/mandos/trunk : revision 777

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#!/usr/bin/python

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#!/usr/bin/python2.7

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

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#

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

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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 = "1.6.1"

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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 = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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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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class AvahiError(Exception):

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

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self.value = value

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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logger.info("Local Zeroconf service name"

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" 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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else:

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if error is None:

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

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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):

430

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 ({0}) [%(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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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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def call_pipe(connection, # : multiprocessing.Connection

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func, *args, **kwargs):

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

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

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return value on the provided multiprocessing.Connection.

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"""

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

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connection.close()

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class Client(object):

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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478

checker, -2 means no checker completed yet.

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last_checker_signal: The signal which killed the last checker, if

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last_checker_status is -1

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

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482

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

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D-Bus identifiers

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

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"last_approval_request", "last_checked_ok",

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

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client_defaults = { "timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

461

"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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def timeout_milliseconds(self):

469

"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

477

"Return the 'interval' attribute in milliseconds"

478

return timedelta_to_milliseconds(self.interval)

479

480

def approval_delay_milliseconds(self):

481

return timedelta_to_milliseconds(self.approval_delay)

499

client_defaults = {

500

"timeout": "PT5M",

501

"extended_timeout": "PT15M",

502

"interval": "PT2M",

503

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

504

"host": "",

505

"approval_delay": "PT0S",

506

"approval_duration": "PT1S",

507

"approved_by_default": "True",

508

"enabled": "True",

509

}

482

510

483

511

@staticmethod

484

512

def config_parser(config):

500

528

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

501

529

"enabled")

502

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

503

534

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

504

535

.replace(" ", ""))

505

536

if "secret" in section:

510

541

"rb") as secfile:

511

542

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

512

543

else:

513

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

544

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

514

545

.format(section))

515

546

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

516

547

client["extended_timeout"] = string_to_delta(

533

564

server_settings = {}

534

565

self.server_settings = server_settings

535

566

# adding all client settings

536

for setting, value in settings.iteritems():

567

for setting, value in settings.items():

537

568

setattr(self, setting, value)

538

569

539

570

if self.enabled:

547

578

self.expires = None

548

579

549

580

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

550

# Uppercase and remove spaces from fingerprint for later

551

# comparison purposes with return value from the fingerprint()

552

# function

553

581

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

554

582

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

555

583

datetime.datetime.utcnow())

562

590

self.current_checker_command = None

563

591

self.approved = None

564

592

self.approvals_pending = 0

565

self.changedstate = (multiprocessing_manager

566

.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

569

self.__dict__.iterkeys()

593

self.changedstate = multiprocessing_manager.Condition(

594

multiprocessing_manager.Lock())

595

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

570

597

if not attr.startswith("_")]

571

598

self.client_structure.append("client_structure")

572

599

573

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

574

lambda obj:

575

isinstance(obj,

576

property)):

600

for name, t in inspect.getmembers(

601

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

577

602

if not name.startswith("_"):

578

603

self.client_structure.append(name)

579

604

621

646

# and every interval from then on.

622

647

if self.checker_initiator_tag is not None:

623

648

gobject.source_remove(self.checker_initiator_tag)

624

self.checker_initiator_tag = (gobject.timeout_add

625

(self.interval_milliseconds(),

626

self.start_checker))

649

self.checker_initiator_tag = gobject.timeout_add(

650

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

651

self.start_checker)

627

652

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

628

653

if self.disable_initiator_tag is not None:

629

654

gobject.source_remove(self.disable_initiator_tag)

630

self.disable_initiator_tag = (gobject.timeout_add

631

(self.timeout_milliseconds(),

632

self.disable))

655

self.disable_initiator_tag = gobject.timeout_add(

656

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

633

657

# Also start a new checker *right now*.

634

658

self.start_checker()

635

659

636

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

660

def checker_callback(self, source, condition, connection,

661

command):

637

662

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

638

663

self.checker_callback_tag = None

639

664

self.checker = None

640

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

665

# Read return code from connection (see call_pipe)

666

returncode = connection.recv()

667

connection.close()

668

669

if returncode >= 0:

670

self.last_checker_status = returncode

671

self.last_checker_signal = None

642

672

if self.last_checker_status == 0:

643

673

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

644

674

vars(self))

645

675

self.checked_ok()

646

676

else:

647

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

648

vars(self))

677

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

649

678

else:

650

679

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

651

681

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

652

682

vars(self))

683

return False

653

684

654

685

def checked_ok(self):

655

686

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

656

687

self.last_checked_ok = datetime.datetime.utcnow()

657

688

self.last_checker_status = 0

689

self.last_checker_signal = None

658

690

self.bump_timeout()

659

691

660

692

def bump_timeout(self, timeout=None):

665

697

gobject.source_remove(self.disable_initiator_tag)

666

698

self.disable_initiator_tag = None

667

699

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

700

self.disable_initiator_tag = gobject.timeout_add(

701

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

671

702

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

672

703

673

704

def need_approval(self):

687

718

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

688

719

# should be.

689

720

690

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

691

try:

692

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

693

except (AttributeError, OSError) as error:

694

if (isinstance(error, OSError)

695

and error.errno != errno.ECHILD):

696

raise error

697

else:

698

if pid:

699

logger.warning("Checker was a zombie")

700

gobject.source_remove(self.checker_callback_tag)

701

self.checker_callback(pid, status,

702

self.current_checker_command)

721

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

722

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

723

self.checker.join()

724

self.checker = None

703

725

# Start a new checker if needed

704

726

if self.checker is None:

705

727

# Escape attributes for the shell

706

escaped_attrs = dict(

707

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

708

for attr in

709

self.runtime_expansions)

728

escaped_attrs = {

729

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

730

for attr in self.runtime_expansions }

710

731

try:

711

732

command = self.checker_command % escaped_attrs

712

733

except TypeError as error:

713

734

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

714

self.checker_command, exc_info=error)

715

return True # Try again later

735

self.checker_command,

736

exc_info=error)

737

return True # Try again later

716

738

self.current_checker_command = command

717

try:

718

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

719

command, self.name)

720

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

721

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

722

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

723

# always replaced by /dev/null.)

724

# The exception is when not debugging but nevertheless

725

# running in the foreground; use the previously

726

# created wnull.

727

popen_args = {}

728

if (not self.server_settings["debug"]

729

and self.server_settings["foreground"]):

730

popen_args.update({"stdout": wnull,

731

"stderr": wnull })

732

self.checker = subprocess.Popen(command,

733

close_fds=True,

734

shell=True, cwd="/",

735

**popen_args)

736

except OSError as error:

737

logger.error("Failed to start subprocess",

738

exc_info=error)

739

return True

740

self.checker_callback_tag = (gobject.child_watch_add

741

(self.checker.pid,

742

self.checker_callback,

743

data=command))

744

# The checker may have completed before the gobject

745

# watch was added. Check for this.

746

try:

747

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

748

except OSError as error:

749

if error.errno == errno.ECHILD:

750

# This should never happen

751

logger.error("Child process vanished",

752

exc_info=error)

753

return True

754

raise

755

if pid:

756

gobject.source_remove(self.checker_callback_tag)

757

self.checker_callback(pid, status, command)

739

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

740

self.name)

741

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

742

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

743

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

744

# always replaced by /dev/null.)

745

# The exception is when not debugging but nevertheless

746

# running in the foreground; use the previously

747

# created wnull.

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

751

if (not self.server_settings["debug"]

752

and self.server_settings["foreground"]):

753

popen_args.update({"stdout": wnull,

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

756

self.checker = multiprocessing.Process(

757

target = call_pipe,

758

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

759

kwargs = popen_args)

760

self.checker.start()

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

763

self.checker_callback, pipe[0], command)

758

764

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

759

765

return True

760

766

772

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

767

773

return

768

774

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

769

try:

770

self.checker.terminate()

771

#time.sleep(0.5)

772

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

773

# self.checker.kill()

774

except OSError as error:

775

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

776

raise

775

self.checker.terminate()

777

776

self.checker = None

778

777

779

778

780

def dbus_service_property(dbus_interface, signature="v",

781

access="readwrite", byte_arrays=False):

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

782

783

"""Decorators for marking methods of a DBusObjectWithProperties to

783

784

become properties on the D-Bus.

784

785

793

794

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

794

795

if byte_arrays and signature != "ay":

795

796

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

796

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

797

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

798

797

799

def decorator(func):

798

800

func._dbus_is_property = True

799

801

func._dbus_interface = dbus_interface

804

806

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

805

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

806

808

return func

809

807

810

return decorator

808

811

809

812

818

821

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

819

822

"false"}

820

823

"""

824

821

825

def decorator(func):

822

826

func._dbus_is_interface = True

823

827

func._dbus_interface = dbus_interface

824

828

func._dbus_name = dbus_interface

825

829

return func

830

826

831

return decorator

827

832

828

833

830

835

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

831

836

Usage:

832

837

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

833

841

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

834

842

access="r")

835

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

836

"org.freedesktop.DBus.Property."

837

"EmitsChangedSignal": "false"})

838

843

def Property_dbus_property(self):

839

844

return dbus.Boolean(False)

840

845

"""

846

841

847

def decorator(func):

842

848

func._dbus_annotations = annotations

843

849

return func

850

844

851

return decorator

845

852

846

853

847

854

class DBusPropertyException(dbus.exceptions.DBusException):

848

855

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

849

856

"""

850

def __unicode__(self):

851

return unicode(str(self))

857

pass

852

858

853

859

854

860

class DBusPropertyAccessException(DBusPropertyException):

878

884

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

879

885

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

880

886

"""

881

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

887

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

882

888

False)

883

889

884

890

def _get_all_dbus_things(self, thing):

885

891

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

886

892

"""

887

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

888

name),

893

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

889

894

athing.__get__(self))

890

895

for cls in self.__class__.__mro__

891

896

for name, athing in

892

inspect.getmembers(cls,

893

self._is_dbus_thing(thing)))

897

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

894

898

895

899

def _get_dbus_property(self, interface_name, property_name):

896

900

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

897

901

property with the specified name and interface.

898

902

"""

899

for cls in self.__class__.__mro__:

900

for name, value in (inspect.getmembers

901

(cls,

902

self._is_dbus_thing("property"))):

903

for cls in self.__class__.__mro__:

904

for name, value in inspect.getmembers(

905

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

903

906

if (value._dbus_name == property_name

904

907

and value._dbus_interface == interface_name):

905

908

return value.__get__(self)

906

909

907

910

# No such property

908

raise DBusPropertyNotFound(self.dbus_object_path + ":"

909

+ interface_name + "."

910

+ property_name)

911

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

912

self.dbus_object_path, interface_name, property_name))

911

913

912

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

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

in_signature="ss",

913

916

out_signature="v")

914

917

def Get(self, interface_name, property_name):

915

918

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

933

936

# The byte_arrays option is not supported yet on

934

937

# signatures other than "ay".

935

938

if prop._dbus_signature != "ay":

936

raise ValueError

939

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

940

"'ay' signature {!r}"

941

.format(prop._dbus_signature))

937

942

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

938

943

for byte in value))

939

944

prop(value)

940

945

941

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

946

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

in_signature="s",

942

948

out_signature="a{sv}")

943

949

def GetAll(self, interface_name):

944

950

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

959

965

if not hasattr(value, "variant_level"):

960

966

properties[name] = value

961

967

continue

962

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

963

value.variant_level+1)

968

properties[name] = type(value)(

969

value, variant_level = value.variant_level + 1)

964

970

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

965

971

972

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

973

def PropertiesChanged(self, interface_name, changed_properties,

974

invalidated_properties):

975

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

976

standard.

977

"""

978

pass

979

966

980

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

967

981

out_signature="s",

968

982

path_keyword='object_path',

976

990

connection)

977

991

try:

978

992

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

993

979

994

def make_tag(document, name, prop):

980

995

e = document.createElement("property")

981

996

e.setAttribute("name", name)

982

997

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

983

998

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

984

999

return e

1000

985

1001

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

986

1002

# Add property tags

987

1003

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

999

1015

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

1000

1016

and prop._dbus_interface

1001

1017

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

1002

annots.update(getattr

1003

(prop,

1004

"_dbus_annotations",

1005

{}))

1006

for name, value in annots.iteritems():

1018

annots.update(getattr(

1019

prop, "_dbus_annotations", {}))

1020

for name, value in annots.items():

1007

1021

ann_tag = document.createElement(

1008

1022

"annotation")

1009

1023

ann_tag.setAttribute("name", name)

1012

1026

# Add interface annotation tags

1013

1027

for annotation, value in dict(

1014

1028

itertools.chain.from_iterable(

1015

annotations().iteritems()

1016

for name, annotations in

1017

self._get_all_dbus_things("interface")

1029

annotations().items()

1030

for name, annotations

1031

in self._get_all_dbus_things("interface")

1018

1032

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

1019

)).iteritems():

1033

)).items():

1020

1034

ann_tag = document.createElement("annotation")

1021

1035

ann_tag.setAttribute("name", annotation)

1022

1036

ann_tag.setAttribute("value", value)

1049

1063

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

1050

1064

if dt is None:

1051

1065

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

1052

return dbus.String(dt.isoformat(),

1053

variant_level=variant_level)

1066

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

1054

1067

1055

1068

1056

1069

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1076

1089

(from DBusObjectWithProperties) and interfaces (from the

1077

1090

dbus_interface_annotations decorator).

1078

1091

"""

1092

1079

1093

def wrapper(cls):

1080

1094

for orig_interface_name, alt_interface_name in (

1081

alt_interface_names.iteritems()):

1095

alt_interface_names.items()):

1082

1096

attr = {}

1083

1097

interface_names = set()

1084

1098

# Go though all attributes of the class

1086

1100

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

1087

1101

# with the wrong interface name

1088

1102

if (not hasattr(attribute, "_dbus_interface")

1089

or not attribute._dbus_interface

1090

.startswith(orig_interface_name)):

1103

or not attribute._dbus_interface.startswith(

1104

orig_interface_name)):

1091

1105

continue

1092

1106

# Create an alternate D-Bus interface name based on

1093

1107

# the current name

1094

alt_interface = (attribute._dbus_interface

1095

.replace(orig_interface_name,

1096

alt_interface_name))

1108

alt_interface = attribute._dbus_interface.replace(

1109

orig_interface_name, alt_interface_name)

1097

1110

interface_names.add(alt_interface)

1098

1111

# Is this a D-Bus signal?

1099

1112

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

1100

# Extract the original non-method undecorated

1101

# function by black magic

1102

nonmethod_func = (dict(

1113

if sys.version_info.major == 2:

1114

# Extract the original non-method undecorated

1115

# function by black magic

1116

nonmethod_func = (dict(

1103

1117

zip(attribute.func_code.co_freevars,

1104

attribute.__closure__))["func"]

1105

.cell_contents)

1118

attribute.__closure__))

1119

["func"].cell_contents)

1120

else:

1121

nonmethod_func = attribute

1106

1122

# Create a new, but exactly alike, function

1107

1123

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

1108

1124

# with the alternate D-Bus interface name

1109

new_function = (dbus.service.signal

1110

(alt_interface,

1111

attribute._dbus_signature)

1112

(types.FunctionType(

1113

nonmethod_func.func_code,

1114

nonmethod_func.func_globals,

1115

nonmethod_func.func_name,

1116

nonmethod_func.func_defaults,

1117

nonmethod_func.func_closure)))

1125

if sys.version_info.major == 2:

1126

new_function = types.FunctionType(

1127

nonmethod_func.func_code,

1128

nonmethod_func.func_globals,

1129

nonmethod_func.func_name,

1130

nonmethod_func.func_defaults,

1131

nonmethod_func.func_closure)

1132

else:

1133

new_function = types.FunctionType(

1134

nonmethod_func.__code__,

1135

nonmethod_func.__globals__,

1136

nonmethod_func.__name__,

1137

nonmethod_func.__defaults__,

1138

nonmethod_func.__closure__)

1139

new_function = (dbus.service.signal(

1140

alt_interface,

1141

attribute._dbus_signature)(new_function))

1118

1142

# Copy annotations, if any

1119

1143

try:

1120

new_function._dbus_annotations = (

1121

dict(attribute._dbus_annotations))

1144

new_function._dbus_annotations = dict(

1145

attribute._dbus_annotations)

1122

1146

except AttributeError:

1123

1147

pass

1124

1148

# Define a creator of a function to call both the

1129

1153

"""This function is a scope container to pass

1130

1154

func1 and func2 to the "call_both" function

1131

1155

outside of its arguments"""

1156

1132

1157

def call_both(*args, **kwargs):

1133

1158

"""This function will emit two D-Bus

1134

1159

signals by calling func1 and func2"""

1135

1160

func1(*args, **kwargs)

1136

1161

func2(*args, **kwargs)

1162

1137

1163

return call_both

1138

1164

# Create the "call_both" function and add it to

1139

1165

# the class

1144

1170

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

1145

1171

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

1146

1172

# to the class.

1147

attr[attrname] = (dbus.service.method

1148

(alt_interface,

1149

attribute._dbus_in_signature,

1150

attribute._dbus_out_signature)

1151

(types.FunctionType

1152

(attribute.func_code,

1153

attribute.func_globals,

1154

attribute.func_name,

1155

attribute.func_defaults,

1156

attribute.func_closure)))

1173

attr[attrname] = (

1174

dbus.service.method(

1175

alt_interface,

1176

attribute._dbus_in_signature,

1177

attribute._dbus_out_signature)

1178

(types.FunctionType(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1157

1183

# Copy annotations, if any

1158

1184

try:

1159

attr[attrname]._dbus_annotations = (

1160

dict(attribute._dbus_annotations))

1185

attr[attrname]._dbus_annotations = dict(

1186

attribute._dbus_annotations)

1161

1187

except AttributeError:

1162

1188

pass

1163

1189

# Is this a D-Bus property?

1166

1192

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

1167

1193

# property with the alternate D-Bus interface

1168

1194

# name. Add it to the class.

1169

attr[attrname] = (dbus_service_property

1170

(alt_interface,

1171

attribute._dbus_signature,

1172

attribute._dbus_access,

1173

attribute

1174

._dbus_get_args_options

1175

["byte_arrays"])

1176

(types.FunctionType

1177

(attribute.func_code,

1178

attribute.func_globals,

1179

attribute.func_name,

1180

attribute.func_defaults,

1181

attribute.func_closure)))

1195

attr[attrname] = (dbus_service_property(

1196

alt_interface, attribute._dbus_signature,

1197

attribute._dbus_access,

1198

attribute._dbus_get_args_options

1199

["byte_arrays"])

1200

(types.FunctionType(

1201

attribute.func_code,

1202

attribute.func_globals,

1203

attribute.func_name,

1204

attribute.func_defaults,

1205

attribute.func_closure)))

1182

1206

# Copy annotations, if any

1183

1207

try:

1184

attr[attrname]._dbus_annotations = (

1185

dict(attribute._dbus_annotations))

1208

attr[attrname]._dbus_annotations = dict(

1209

attribute._dbus_annotations)

1186

1210

except AttributeError:

1187

1211

pass

1188

1212

# Is this a D-Bus interface?

1191

1215

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

1192

1216

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

1193

1217

# to the class.

1194

attr[attrname] = (dbus_interface_annotations

1195

(alt_interface)

1196

(types.FunctionType

1197

(attribute.func_code,

1198

attribute.func_globals,

1199

attribute.func_name,

1200

attribute.func_defaults,

1201

attribute.func_closure)))

1218

attr[attrname] = (

1219

dbus_interface_annotations(alt_interface)

1220

(types.FunctionType(attribute.func_code,

1221

attribute.func_globals,

1222

attribute.func_name,

1223

attribute.func_defaults,

1224

attribute.func_closure)))

1202

1225

if deprecate:

1203

1226

# Deprecate all alternate interfaces

1204

iname="_AlternateDBusNames_interface_annotation{0}"

1227

iname="_AlternateDBusNames_interface_annotation{}"

1205

1228

for interface_name in interface_names:

1229

1206

1230

@dbus_interface_annotations(interface_name)

1207

1231

def func(self):

1208

1232

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

1209

"true" }

1233

"true" }

1210

1234

# Find an unused name

1211

1235

for aname in (iname.format(i)

1212

1236

for i in itertools.count()):

1216

1240

if interface_names:

1217

1241

# Replace the class with a new subclass of it with

1218

1242

# methods, signals, etc. as created above.

1219

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

1220

(cls,), attr)

1243

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

1244

(cls, ), attr)

1221

1245

return cls

1246

1222

1247

return wrapper

1223

1248

1224

1249

1225

1250

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

1226

"se.bsnet.fukt.Mandos"})

1251

"se.bsnet.fukt.Mandos"})

1227

1252

class ClientDBus(Client, DBusObjectWithProperties):

1228

1253

"""A Client class using D-Bus

1229

1254

1233

1258

"""

1234

1259

1235

1260

runtime_expansions = (Client.runtime_expansions

1236

+ ("dbus_object_path",))

1261

+ ("dbus_object_path", ))

1262

1263

_interface = "se.recompile.Mandos.Client"

1237

1264

1238

1265

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

1239

1266

1242

1269

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

1243

1270

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

1244

1271

# the D-Bus

1245

client_object_name = unicode(self.name).translate(

1272

client_object_name = str(self.name).translate(

1246

1273

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

1247

1274

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

1248

self.dbus_object_path = (dbus.ObjectPath

1249

("/clients/" + client_object_name))

1275

self.dbus_object_path = dbus.ObjectPath(

1276

"/clients/" + client_object_name)

1250

1277

DBusObjectWithProperties.__init__(self, self.bus,

1251

1278

self.dbus_object_path)

1252

1279

1253

def notifychangeproperty(transform_func,

1254

dbus_name, type_func=lambda x: x,

1255

variant_level=1):

1280

def notifychangeproperty(transform_func, dbus_name,

1281

type_func=lambda x: x,

1282

variant_level=1,

1283

invalidate_only=False,

1284

_interface=_interface):

1256

1285

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

1257

1286

its changes to DBus.

1258

1287

1263

1292

to the D-Bus. Default: no transform

1264

1293

variant_level: D-Bus variant level. Default: 1

1265

1294

"""

1266

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

1295

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

1296

1267

1297

def setter(self, value):

1268

1298

if hasattr(self, "dbus_object_path"):

1269

1299

if (not hasattr(self, attrname) or

1270

1300

type_func(getattr(self, attrname, None))

1271

1301

!= type_func(value)):

1272

dbus_value = transform_func(type_func(value),

1273

variant_level

1274

=variant_level)

1275

self.PropertyChanged(dbus.String(dbus_name),

1276

dbus_value)

1302

if invalidate_only:

1303

self.PropertiesChanged(

1304

_interface, dbus.Dictionary(),

1305

dbus.Array((dbus_name, )))

1306

else:

1307

dbus_value = transform_func(

1308

type_func(value),

1309

variant_level = variant_level)

1310

self.PropertyChanged(dbus.String(dbus_name),

1311

dbus_value)

1312

self.PropertiesChanged(

1313

_interface,

1314

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

1315

dbus_value }),

1316

dbus.Array())

1277

1317

setattr(self, attrname, value)

1278

1318

1279

1319

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

1285

1325

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

1286

1326

last_enabled = notifychangeproperty(datetime_to_dbus,

1287

1327

"LastEnabled")

1288

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

1289

type_func = lambda checker:

1290

checker is not None)

1328

checker = notifychangeproperty(

1329

dbus.Boolean, "CheckerRunning",

1330

type_func = lambda checker: checker is not None)

1291

1331

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1292

1332

"LastCheckedOK")

1293

1333

last_checker_status = notifychangeproperty(dbus.Int16,

1296

1336

datetime_to_dbus, "LastApprovalRequest")

1297

1337

approved_by_default = notifychangeproperty(dbus.Boolean,

1298

1338

"ApprovedByDefault")

1299

approval_delay = notifychangeproperty(dbus.UInt64,

1300

"ApprovalDelay",

1301

type_func =

1302

timedelta_to_milliseconds)

1339

approval_delay = notifychangeproperty(

1340

dbus.UInt64, "ApprovalDelay",

1341

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

1303

1342

approval_duration = notifychangeproperty(

1304

1343

dbus.UInt64, "ApprovalDuration",

1305

type_func = timedelta_to_milliseconds)

1344

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

1306

1345

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

1307

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

1308

type_func =

1309

timedelta_to_milliseconds)

1346

timeout = notifychangeproperty(

1347

dbus.UInt64, "Timeout",

1348

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

1310

1349

extended_timeout = notifychangeproperty(

1311

1350

dbus.UInt64, "ExtendedTimeout",

1312

type_func = timedelta_to_milliseconds)

1313

interval = notifychangeproperty(dbus.UInt64,

1314

"Interval",

1315

type_func =

1316

timedelta_to_milliseconds)

1351

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

1352

interval = notifychangeproperty(

1353

dbus.UInt64, "Interval",

1354

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

1317

1355

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

1356

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

1357

invalidate_only=True)

1318

1358

1319

1359

del notifychangeproperty

1320

1360

1327

1367

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

1328

1368

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

1329

1369

1330

def checker_callback(self, pid, condition, command,

1331

*args, **kwargs):

1332

self.checker_callback_tag = None

1333

self.checker = None

1334

if os.WIFEXITED(condition):

1335

exitstatus = os.WEXITSTATUS(condition)

1370

def checker_callback(self, source, condition,

1371

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

1372

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

1373

connection, command, *args,

1374

**kwargs)

1375

exitstatus = self.last_checker_status

1376

if exitstatus >= 0:

1336

1377

# Emit D-Bus signal

1337

1378

self.CheckerCompleted(dbus.Int16(exitstatus),

1338

dbus.Int64(condition),

1379

dbus.Int64(0),

1339

1380

dbus.String(command))

1340

1381

else:

1341

1382

# Emit D-Bus signal

1342

1383

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

1343

dbus.Int64(condition),

1384

dbus.Int64(

1385

self.last_checker_signal),

1344

1386

dbus.String(command))

1345

1346

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

1347

*args, **kwargs)

1387

return ret

1348

1388

1349

1389

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

1350

old_checker = self.checker

1351

if self.checker is not None:

1352

old_checker_pid = self.checker.pid

1353

else:

1354

old_checker_pid = None

1390

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

1355

1391

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

1356

1392

# Only if new checker process was started

1357

1393

if (self.checker is not None

1366

1402

1367

1403

def approve(self, value=True):

1368

1404

self.approved = value

1369

gobject.timeout_add(timedelta_to_milliseconds

1370

(self.approval_duration),

1371

self._reset_approved)

1405

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

1406

* 1000), self._reset_approved)

1372

1407

self.send_changedstate()

1373

1408

1374

1409

## D-Bus methods, signals & properties

1375

_interface = "se.recompile.Mandos.Client"

1376

1410

1377

1411

## Interfaces

1378

1412

1379

@dbus_interface_annotations(_interface)

1380

def _foo(self):

1381

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

1382

"false"}

1383

1384

1413

## Signals

1385

1414

1386

1415

# CheckerCompleted - signal

1396

1425

pass

1397

1426

1398

1427

# PropertyChanged - signal

1428

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

1399

1429

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

1400

1430

def PropertyChanged(self, property, value):

1401

1431

"D-Bus signal"

1465

1495

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

1466

1496

1467

1497

# ApprovedByDefault - property

1468

@dbus_service_property(_interface, signature="b",

1498

@dbus_service_property(_interface,

1499

signature="b",

1469

1500

access="readwrite")

1470

1501

def ApprovedByDefault_dbus_property(self, value=None):

1471

1502

if value is None: # get

1473

1504

self.approved_by_default = bool(value)

1474

1505

1475

1506

# ApprovalDelay - property

1476

@dbus_service_property(_interface, signature="t",

1507

@dbus_service_property(_interface,

1508

signature="t",

1477

1509

access="readwrite")

1478

1510

def ApprovalDelay_dbus_property(self, value=None):

1479

1511

if value is None: # get

1480

return dbus.UInt64(self.approval_delay_milliseconds())

1512

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

1513

* 1000)

1481

1514

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

1482

1515

1483

1516

# ApprovalDuration - property

1484

@dbus_service_property(_interface, signature="t",

1517

@dbus_service_property(_interface,

1518

signature="t",

1485

1519

access="readwrite")

1486

1520

def ApprovalDuration_dbus_property(self, value=None):

1487

1521

if value is None: # get

1488

return dbus.UInt64(timedelta_to_milliseconds(

1489

self.approval_duration))

1522

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

1523

* 1000)

1490

1524

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

1491

1525

1492

1526

# Name - property

1500

1534

return dbus.String(self.fingerprint)

1501

1535

1502

1536

# Host - property

1503

@dbus_service_property(_interface, signature="s",

1537

@dbus_service_property(_interface,

1538

signature="s",

1504

1539

access="readwrite")

1505

1540

def Host_dbus_property(self, value=None):

1506

1541

if value is None: # get

1507

1542

return dbus.String(self.host)

1508

self.host = unicode(value)

1543

self.host = str(value)

1509

1544

1510

1545

# Created - property

1511

1546

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

1518

1553

return datetime_to_dbus(self.last_enabled)

1519

1554

1520

1555

# Enabled - property

1521

@dbus_service_property(_interface, signature="b",

1556

@dbus_service_property(_interface,

1557

signature="b",

1522

1558

access="readwrite")

1523

1559

def Enabled_dbus_property(self, value=None):

1524

1560

if value is None: # get

1529

1565

self.disable()

1530

1566

1531

1567

# LastCheckedOK - property

1532

@dbus_service_property(_interface, signature="s",

1568

@dbus_service_property(_interface,

1569

signature="s",

1533

1570

access="readwrite")

1534

1571

def LastCheckedOK_dbus_property(self, value=None):

1535

1572

if value is not None:

1538

1575

return datetime_to_dbus(self.last_checked_ok)

1539

1576

1540

1577

# LastCheckerStatus - property

1541

@dbus_service_property(_interface, signature="n",

1542

access="read")

1578

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

1543

1579

def LastCheckerStatus_dbus_property(self):

1544

1580

return dbus.Int16(self.last_checker_status)

1545

1581

1554

1590

return datetime_to_dbus(self.last_approval_request)

1555

1591

1556

1592

# Timeout - property

1557

@dbus_service_property(_interface, signature="t",

1593

@dbus_service_property(_interface,

1594

signature="t",

1558

1595

access="readwrite")

1559

1596

def Timeout_dbus_property(self, value=None):

1560

1597

if value is None: # get

1561

return dbus.UInt64(self.timeout_milliseconds())

1598

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

1562

1599

old_timeout = self.timeout

1563

1600

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

1564

1601

# Reschedule disabling

1573

1610

is None):

1574

1611

return

1575

1612

gobject.source_remove(self.disable_initiator_tag)

1576

self.disable_initiator_tag = (

1577

gobject.timeout_add(

1578

timedelta_to_milliseconds(self.expires - now),

1579

self.disable))

1613

self.disable_initiator_tag = gobject.timeout_add(

1614

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

1615

self.disable)

1580

1616

1581

1617

# ExtendedTimeout - property

1582

@dbus_service_property(_interface, signature="t",

1618

@dbus_service_property(_interface,

1619

signature="t",

1583

1620

access="readwrite")

1584

1621

def ExtendedTimeout_dbus_property(self, value=None):

1585

1622

if value is None: # get

1586

return dbus.UInt64(self.extended_timeout_milliseconds())

1623

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

1624

* 1000)

1587

1625

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

1588

1626

1589

1627

# Interval - property

1590

@dbus_service_property(_interface, signature="t",

1628

@dbus_service_property(_interface,

1629

signature="t",

1591

1630

access="readwrite")

1592

1631

def Interval_dbus_property(self, value=None):

1593

1632

if value is None: # get

1594

return dbus.UInt64(self.interval_milliseconds())

1633

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

1595

1634

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

1596

1635

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

1597

1636

return

1598

1637

if self.enabled:

1599

1638

# Reschedule checker run

1600

1639

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

1640

self.checker_initiator_tag = gobject.timeout_add(

1641

value, self.start_checker)

1642

self.start_checker() # Start one now, too

1604

1643

1605

1644

# Checker - property

1606

@dbus_service_property(_interface, signature="s",

1645

@dbus_service_property(_interface,

1646

signature="s",

1607

1647

access="readwrite")

1608

1648

def Checker_dbus_property(self, value=None):

1609

1649

if value is None: # get

1610

1650

return dbus.String(self.checker_command)

1611

self.checker_command = unicode(value)

1651

self.checker_command = str(value)

1612

1652

1613

1653

# CheckerRunning - property

1614

@dbus_service_property(_interface, signature="b",

1654

@dbus_service_property(_interface,

1655

signature="b",

1615

1656

access="readwrite")

1616

1657

def CheckerRunning_dbus_property(self, value=None):

1617

1658

if value is None: # get

1627

1668

return self.dbus_object_path # is already a dbus.ObjectPath

1628

1669

1629

1670

# Secret = property

1630

@dbus_service_property(_interface, signature="ay",

1631

access="write", byte_arrays=True)

1671

@dbus_service_property(_interface,

1672

signature="ay",

1673

access="write",

1674

byte_arrays=True)

1632

1675

def Secret_dbus_property(self, value):

1633

self.secret = str(value)

1676

self.secret = bytes(value)

1634

1677

1635

1678

del _interface

1636

1679

1640

1683

self._pipe = child_pipe

1641

1684

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

1642

1685

if not self._pipe.recv():

1643

raise KeyError()

1686

raise KeyError(fpr)

1644

1687

1645

1688

def __getattribute__(self, name):

1646

1689

if name == '_pipe':

1650

1693

if data[0] == 'data':

1651

1694

return data[1]

1652

1695

if data[0] == 'function':

1696

1653

1697

def func(*args, **kwargs):

1654

1698

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

1655

1699

return self._pipe.recv()[1]

1700

1656

1701

return func

1657

1702

1658

1703

def __setattr__(self, name, value):

1670

1715

def handle(self):

1671

1716

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

1672

1717

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

1673

unicode(self.client_address))

1718

str(self.client_address))

1674

1719

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

1675

1720

self.server.child_pipe.fileno())

1676

1721

1677

session = (gnutls.connection

1678

.ClientSession(self.request,

1679

gnutls.connection

1680

.X509Credentials()))

1722

session = gnutls.connection.ClientSession(

1723

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

1681

1724

1682

1725

# Note: gnutls.connection.X509Credentials is really a

1683

1726

# generic GnuTLS certificate credentials object so long as

1692

1735

priority = self.server.gnutls_priority

1693

1736

if priority is None:

1694

1737

priority = "NORMAL"

1695

(gnutls.library.functions

1696

.gnutls_priority_set_direct(session._c_object,

1697

priority, None))

1738

gnutls.library.functions.gnutls_priority_set_direct(

1739

session._c_object, priority, None)

1698

1740

1699

1741

# Start communication using the Mandos protocol

1700

1742

# Get protocol number

1702

1744

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

1703

1745

try:

1704

1746

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

1705

raise RuntimeError

1747

raise RuntimeError(line)

1706

1748

except (ValueError, IndexError, RuntimeError) as error:

1707

1749

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

1708

1750

return

1720

1762

approval_required = False

1721

1763

try:

1722

1764

try:

1723

fpr = self.fingerprint(self.peer_certificate

1724

(session))

1765

fpr = self.fingerprint(

1766

self.peer_certificate(session))

1725

1767

except (TypeError,

1726

1768

gnutls.errors.GNUTLSError) as error:

1727

1769

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

1742

1784

while True:

1743

1785

if not client.enabled:

1744

1786

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

1745

client.name)

1787

client.name)

1746

1788

if self.server.use_dbus:

1747

1789

# Emit D-Bus signal

1748

1790

client.Rejected("Disabled")

1757

1799

if self.server.use_dbus:

1758

1800

# Emit D-Bus signal

1759

1801

client.NeedApproval(

1760

client.approval_delay_milliseconds(),

1761

client.approved_by_default)

1802

client.approval_delay.total_seconds()

1803

* 1000, client.approved_by_default)

1762

1804

else:

1763

1805

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

1764

1806

client.name)

1770

1812

#wait until timeout or approved

1771

1813

time = datetime.datetime.now()

1772

1814

client.changedstate.acquire()

1773

client.changedstate.wait(

1774

float(timedelta_to_milliseconds(delay)

1775

/ 1000))

1815

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

1776

1816

client.changedstate.release()

1777

1817

time2 = datetime.datetime.now()

1778

1818

if (time2 - time) >= delay:

1797

1837

logger.warning("gnutls send failed",

1798

1838

exc_info=error)

1799

1839

return

1800

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

1801

sent, len(client.secret)

1802

- (sent_size + sent))

1840

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

1841

len(client.secret) - (sent_size

1842

+ sent))

1803

1843

sent_size += sent

1804

1844

1805

1845

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

1822

1862

def peer_certificate(session):

1823

1863

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

1824

1864

# If not an OpenPGP certificate...

1825

if (gnutls.library.functions

1826

.gnutls_certificate_type_get(session._c_object)

1865

if (gnutls.library.functions.gnutls_certificate_type_get(

1866

session._c_object)

1827

1867

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1828

1868

# ...do the normal thing

1829

1869

return session.peer_certificate

1843

1883

def fingerprint(openpgp):

1844

1884

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1845

1885

# New GnuTLS "datum" with the OpenPGP public key

1846

datum = (gnutls.library.types

1847

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

1848

ctypes.POINTER

1849

(ctypes.c_ubyte)),

1850

ctypes.c_uint(len(openpgp))))

1886

datum = gnutls.library.types.gnutls_datum_t(

1887

ctypes.cast(ctypes.c_char_p(openpgp),

1888

ctypes.POINTER(ctypes.c_ubyte)),

1889

ctypes.c_uint(len(openpgp)))

1851

1890

# New empty GnuTLS certificate

1852

1891

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1853

(gnutls.library.functions

1854

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1892

gnutls.library.functions.gnutls_openpgp_crt_init(

1893

ctypes.byref(crt))

1855

1894

# Import the OpenPGP public key into the certificate

1856

(gnutls.library.functions

1857

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

1858

gnutls.library.constants

1859

.GNUTLS_OPENPGP_FMT_RAW))

1895

gnutls.library.functions.gnutls_openpgp_crt_import(

1896

crt, ctypes.byref(datum),

1897

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1860

1898

# Verify the self signature in the key

1861

1899

crtverify = ctypes.c_uint()

1862

(gnutls.library.functions

1863

.gnutls_openpgp_crt_verify_self(crt, 0,

1864

ctypes.byref(crtverify)))

1900

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1901

crt, 0, ctypes.byref(crtverify))

1865

1902

if crtverify.value != 0:

1866

1903

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1867

raise (gnutls.errors.CertificateSecurityError

1868

("Verify failed"))

1904

raise gnutls.errors.CertificateSecurityError(

1905

"Verify failed")

1869

1906

# New buffer for the fingerprint

1870

1907

buf = ctypes.create_string_buffer(20)

1871

1908

buf_len = ctypes.c_size_t()

1872

1909

# Get the fingerprint from the certificate into the buffer

1873

(gnutls.library.functions

1874

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

1875

ctypes.byref(buf_len)))

1910

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1911

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

1876

1912

# Deinit the certificate

1877

1913

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1878

1914

# Convert the buffer to a Python bytestring

1884

1920

1885

1921

class MultiprocessingMixIn(object):

1886

1922

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

1923

1887

1924

def sub_process_main(self, request, address):

1888

1925

try:

1889

1926

self.finish_request(request, address)

1901

1938

1902

1939

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1903

1940

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

1941

1904

1942

def process_request(self, request, client_address):

1905

1943

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

1906

1944

1915

1953

1916

1954

def add_pipe(self, parent_pipe, proc):

1917

1955

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

1918

raise NotImplementedError

1956

raise NotImplementedError()

1919

1957

1920

1958

1921

1959

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1927

1965

interface: None or a network interface name (string)

1928

1966

use_ipv6: Boolean; to use IPv6 or not

1929

1967

"""

1968

1930

1969

def __init__(self, server_address, RequestHandlerClass,

1931

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

1970

interface=None,

1971

use_ipv6=True,

1972

socketfd=None):

1932

1973

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

1933

1974

creating a new one with socket.socket().

1934

1975

"""

1975

2016

self.interface)

1976

2017

else:

1977

2018

try:

1978

self.socket.setsockopt(socket.SOL_SOCKET,

1979

SO_BINDTODEVICE,

1980

str(self.interface + '\0'))

2019

self.socket.setsockopt(

2020

socket.SOL_SOCKET, SO_BINDTODEVICE,

2021

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

1981

2022

except socket.error as error:

1982

2023

if error.errno == errno.EPERM:

1983

2024

logger.error("No permission to bind to"

2001

2042

self.server_address = (any_address,

2002

2043

self.server_address[1])

2003

2044

elif not self.server_address[1]:

2004

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

2005

0)

2045

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

2006

2046

# if self.interface:

2007

2047

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

2008

2048

# 0, # port

2022

2062

2023

2063

Assumes a gobject.MainLoop event loop.

2024

2064

"""

2065

2025

2066

def __init__(self, server_address, RequestHandlerClass,

2026

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

2027

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

2067

interface=None,

2068

use_ipv6=True,

2069

clients=None,

2070

gnutls_priority=None,

2071

use_dbus=True,

2072

socketfd=None):

2028

2073

self.enabled = False

2029

2074

self.clients = clients

2030

2075

if self.clients is None:

2036

2081

interface = interface,

2037

2082

use_ipv6 = use_ipv6,

2038

2083

socketfd = socketfd)

2084

2039

2085

def server_activate(self):

2040

2086

if self.enabled:

2041

2087

return socketserver.TCPServer.server_activate(self)

2045

2091

2046

2092

def add_pipe(self, parent_pipe, proc):

2047

2093

# Call "handle_ipc" for both data and EOF events

2048

gobject.io_add_watch(parent_pipe.fileno(),

2049

gobject.IO_IN | gobject.IO_HUP,

2050

functools.partial(self.handle_ipc,

2051

parent_pipe =

2052

parent_pipe,

2053

proc = proc))

2094

gobject.io_add_watch(

2095

parent_pipe.fileno(),

2096

gobject.IO_IN | gobject.IO_HUP,

2097

functools.partial(self.handle_ipc,

2098

parent_pipe = parent_pipe,

2099

proc = proc))

2054

2100

2055

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

2056

proc = None, client_object=None):

2101

def handle_ipc(self, source, condition,

2102

parent_pipe=None,

2103

proc = None,

2104

client_object=None):

2057

2105

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

2058

2106

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

2059

2107

# Wait for other process to exit

2082

2130

parent_pipe.send(False)

2083

2131

return False

2084

2132

2085

gobject.io_add_watch(parent_pipe.fileno(),

2086

gobject.IO_IN | gobject.IO_HUP,

2087

functools.partial(self.handle_ipc,

2088

parent_pipe =

2089

parent_pipe,

2090

proc = proc,

2091

client_object =

2092

client))

2133

gobject.io_add_watch(

2134

parent_pipe.fileno(),

2135

gobject.IO_IN | gobject.IO_HUP,

2136

functools.partial(self.handle_ipc,

2137

parent_pipe = parent_pipe,

2138

proc = proc,

2139

client_object = client))

2093

2140

parent_pipe.send(True)

2094

2141

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

2095

2142

# same fileno

2101

2148

2102

2149

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

2103

2150

funcname)(*args,

2104

**kwargs)))

2151

**kwargs)))

2105

2152

2106

2153

if command == 'getattr':

2107

2154

attrname = request[1]

2108

if callable(client_object.__getattribute__(attrname)):

2109

parent_pipe.send(('function',))

2155

if isinstance(client_object.__getattribute__(attrname),

2156

collections.Callable):

2157

parent_pipe.send(('function', ))

2110

2158

else:

2111

parent_pipe.send(('data', client_object

2112

.__getattribute__(attrname)))

2159

parent_pipe.send((

2160

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

2113

2161

2114

2162

if command == 'setattr':

2115

2163

attrname = request[1]

2146

2194

# avoid excessive use of external libraries.

2147

2195

2148

2196

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

2149

Token = collections.namedtuple("Token",

2150

("regexp", # To match token; if

2151

# "value" is not None,

2152

# must have a "group"

2153

# containing digits

2154

"value", # datetime.timedelta or

2155

# None

2156

"followers")) # Tokens valid after

2157

# this token

2197

Token = collections.namedtuple("Token", (

2198

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

2199

# a "group" containing digits

2200

"value", # datetime.timedelta or None

2201

"followers")) # Tokens valid after this token

2158

2202

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

2159

2203

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

2160

2204

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

2161

2205

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

2162

2206

datetime.timedelta(seconds=1),

2163

frozenset((token_end,)))

2207

frozenset((token_end, )))

2164

2208

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

2165

2209

datetime.timedelta(minutes=1),

2166

2210

frozenset((token_second, token_end)))

2182

2226

frozenset((token_month, token_end)))

2183

2227

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

2184

2228

datetime.timedelta(weeks=1),

2185

frozenset((token_end,)))

2229

frozenset((token_end, )))

2186

2230

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

2187

2231

frozenset((token_year, token_month,

2188

2232

token_day, token_time,

2189

token_week))),

2233

token_week)))

2190

2234

# Define starting values

2191

2235

value = datetime.timedelta() # Value so far

2192

2236

found_token = None

2193

followers = frozenset(token_duration,) # Following valid tokens

2237

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

2194

2238

s = duration # String left to parse

2195

2239

# Loop until end token is found

2196

2240

while found_token is not token_end:

2213

2257

break

2214

2258

else:

2215

2259

# No currently valid tokens were found

2216

raise ValueError("Invalid RFC 3339 duration")

2260

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

2261

.format(duration))

2217

2262

# End token found

2218

2263

return value

2219

2264

2243

2288

timevalue = datetime.timedelta(0)

2244

2289

for s in interval.split():

2245

2290

try:

2246

suffix = unicode(s[-1])

2291

suffix = s[-1]

2247

2292

value = int(s[:-1])

2248

2293

if suffix == "d":

2249

2294

delta = datetime.timedelta(value)

2256

2301

elif suffix == "w":

2257

2302

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

2258

2303

else:

2259

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

2260

.format(suffix))

2261

except (ValueError, IndexError) as e:

2304

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

2305

except IndexError as e:

2262

2306

raise ValueError(*(e.args))

2263

2307

timevalue += delta

2264

2308

return timevalue

2280

2324

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

2281

2325

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

2282

2326

raise OSError(errno.ENODEV,

2283

"{0} not a character device"

2327

"{} not a character device"

2284

2328

.format(os.devnull))

2285

2329

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

2286

2330

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

2296

2340

2297

2341

parser = argparse.ArgumentParser()

2298

2342

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

2299

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

2343

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

2300

2344

help="show version number and exit")

2301

2345

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

2302

2346

help="Bind to interface IF")

2335

2379

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

2336

2380

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

2337

2381

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

2382

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

2383

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

2384

default=None)

2338

2385

2339

2386

options = parser.parse_args()

2340

2387

2341

2388

if options.check:

2342

2389

import doctest

2343

doctest.testmod()

2344

sys.exit()

2390

fail_count, test_count = doctest.testmod()

2391

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

2345

2392

2346

2393

# Default values for config file for server-global settings

2347

2394

server_defaults = { "interface": "",

2349

2396

"port": "",

2350

2397

"debug": "False",

2351

2398

"priority":

2352

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

2399

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

2400

":+SIGN-DSA-SHA256",

2353

2401

"servicename": "Mandos",

2354

2402

"use_dbus": "True",

2355

2403

"use_ipv6": "True",

2358

2406

"socket": "",

2359

2407

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

2360

2408

"foreground": "False",

2361

}

2409

"zeroconf": "True",

2410

}

2362

2411

2363

2412

# Parse config file for server-global settings

2364

2413

server_config = configparser.SafeConfigParser(server_defaults)

2365

2414

del server_defaults

2366

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

2367

"mandos.conf"))

2415

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

2368

2416

# Convert the SafeConfigParser object to a dict

2369

2417

server_settings = server_config.defaults()

2370

2418

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

2388

2436

# Override the settings from the config file with command line

2389

2437

# options, if set.

2390

2438

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

2391

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

2392

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

2393

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

2439

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

2440

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

2441

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

2394

2442

value = getattr(options, option)

2395

2443

if value is not None:

2396

2444

server_settings[option] = value

2397

2445

del options

2398

2446

# Force all strings to be unicode

2399

2447

for option in server_settings.keys():

2400

if type(server_settings[option]) is str:

2401

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

2448

if isinstance(server_settings[option], bytes):

2449

server_settings[option] = (server_settings[option]

2450

.decode("utf-8"))

2402

2451

# Force all boolean options to be boolean

2403

2452

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

2404

"foreground"):

2453

"foreground", "zeroconf"):

2405

2454

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

2406

2455

# Debug implies foreground

2407

2456

if server_settings["debug"]:

2410

2459

2411

2460

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

2412

2461

2462

if (not server_settings["zeroconf"]

2463

and not (server_settings["port"]

2464

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

2465

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

2466

2413

2467

# For convenience

2414

2468

debug = server_settings["debug"]

2415

2469

debuglevel = server_settings["debuglevel"]

2418

2472

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

2419

2473

stored_state_file)

2420

2474

foreground = server_settings["foreground"]

2475

zeroconf = server_settings["zeroconf"]

2421

2476

2422

2477

if debug:

2423

2478

initlogger(debug, logging.DEBUG)

2429

2484

initlogger(debug, level)

2430

2485

2431

2486

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

2432

syslogger.setFormatter(logging.Formatter

2433

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

2434

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

2435

.format(server_settings

2436

["servicename"])))

2487

syslogger.setFormatter(

2488

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

2489

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

2490

server_settings["servicename"])))

2437

2491

2438

2492

# Parse config file with clients

2439

2493

client_config = configparser.SafeConfigParser(Client

2444

2498

global mandos_dbus_service

2445

2499

mandos_dbus_service = None

2446

2500

2447

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

2448

server_settings["port"]),

2449

ClientHandler,

2450

interface=(server_settings["interface"]

2451

or None),

2452

use_ipv6=use_ipv6,

2453

gnutls_priority=

2454

server_settings["priority"],

2455

use_dbus=use_dbus,

2456

socketfd=(server_settings["socket"]

2457

or None))

2501

socketfd = None

2502

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

2503

socketfd = server_settings["socket"]

2504

tcp_server = MandosServer(

2505

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

2506

ClientHandler,

2507

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

2508

use_ipv6=use_ipv6,

2509

gnutls_priority=server_settings["priority"],

2510

use_dbus=use_dbus,

2511

socketfd=socketfd)

2458

2512

if not foreground:

2459

2513

pidfilename = "/run/mandos.pid"

2514

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

2515

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

2460

2516

pidfile = None

2461

2517

try:

2462

pidfile = open(pidfilename, "w")

2518

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

2463

2519

except IOError as e:

2464

2520

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

2465

2521

exc_info=e)

2479

2535

os.setuid(uid)

2480

2536

except OSError as error:

2481

2537

if error.errno != errno.EPERM:

2482

raise error

2538

raise

2483

2539

2484

2540

if debug:

2485

2541

# Enable all possible GnuTLS debugging

2492

2548

def debug_gnutls(level, string):

2493

2549

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

2494

2550

2495

(gnutls.library.functions

2496

.gnutls_global_set_log_function(debug_gnutls))

2551

gnutls.library.functions.gnutls_global_set_log_function(

2552

debug_gnutls)

2497

2553

2498

2554

# Redirect stdin so all checkers get /dev/null

2499

2555

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

2519

2575

if use_dbus:

2520

2576

try:

2521

2577

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

2522

bus, do_not_queue=True)

2523

old_bus_name = (dbus.service.BusName

2524

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

2525

do_not_queue=True))

2526

except dbus.exceptions.NameExistsException as e:

2578

bus,

2579

do_not_queue=True)

2580

old_bus_name = dbus.service.BusName(

2581

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

2582

do_not_queue=True)

2583

except dbus.exceptions.DBusException as e:

2527

2584

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

2528

2585

use_dbus = False

2529

2586

server_settings["use_dbus"] = False

2530

2587

tcp_server.use_dbus = False

2531

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2532

service = AvahiServiceToSyslog(name =

2533

server_settings["servicename"],

2534

servicetype = "_mandos._tcp",

2535

protocol = protocol, bus = bus)

2536

if server_settings["interface"]:

2537

service.interface = (if_nametoindex

2538

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

2588

if zeroconf:

2589

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2590

service = AvahiServiceToSyslog(

2591

name = server_settings["servicename"],

2592

servicetype = "_mandos._tcp",

2593

protocol = protocol,

2594

bus = bus)

2595

if server_settings["interface"]:

2596

service.interface = if_nametoindex(

2597

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

2539

2598

2540

2599

global multiprocessing_manager

2541

2600

multiprocessing_manager = multiprocessing.Manager()

2560

2619

if server_settings["restore"]:

2561

2620

try:

2562

2621

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

2563

clients_data, old_client_settings = (pickle.load

2564

(stored_state))

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

2565

2624

os.remove(stored_state_path)

2566

2625

except IOError as e:

2567

2626

if e.errno == errno.ENOENT:

2568

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

2569

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

2627

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

2628

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

2570

2629

else:

2571

2630

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

2572

2631

exc_info=e)

2573

2632

raise

2574

2633

except EOFError as e:

2575

2634

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

2576

"EOFError:", exc_info=e)

2635

"EOFError:",

2636

exc_info=e)

2577

2637

2578

2638

with PGPEngine() as pgp:

2579

for client_name, client in clients_data.iteritems():

2639

for client_name, client in clients_data.items():

2580

2640

# Skip removed clients

2581

2641

if client_name not in client_settings:

2582

2642

continue

2591

2651

# For each value in new config, check if it

2592

2652

# differs from the old config value (Except for

2593

2653

# the "secret" attribute)

2594

if (name != "secret" and

2595

value != old_client_settings[client_name]

2596

[name]):

2654

if (name != "secret"

2655

and (value !=

2656

old_client_settings[client_name][name])):

2597

2657

client[name] = value

2598

2658

except KeyError:

2599

2659

pass

2600

2660

2601

2661

# Clients who has passed its expire date can still be

2602

# enabled if its last checker was successful. Clients

2662

# enabled if its last checker was successful. A Client

2603

2663

# whose checker succeeded before we stored its state is

2604

2664

# assumed to have successfully run all checkers during

2605

2665

# downtime.

2607

2667

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

2608

2668

if not client["last_checked_ok"]:

2609

2669

logger.warning(

2610

"disabling client {0} - Client never "

2611

"performed a successful checker"

2612

.format(client_name))

2670

"disabling client {} - Client never "

2671

"performed a successful checker".format(

2672

client_name))

2613

2673

client["enabled"] = False

2614

2674

elif client["last_checker_status"] != 0:

2615

2675

logger.warning(

2616

"disabling client {0} - Client "

2617

"last checker failed with error code {1}"

2618

.format(client_name,

2619

client["last_checker_status"]))

2676

"disabling client {} - Client last"

2677

" checker failed with error code"

2678

" {}".format(

2679

client_name,

2680

client["last_checker_status"]))

2620

2681

client["enabled"] = False

2621

2682

else:

2622

client["expires"] = (datetime.datetime

2623

.utcnow()

2624

+ client["timeout"])

2683

client["expires"] = (

2684

datetime.datetime.utcnow()

2685

+ client["timeout"])

2625

2686

logger.debug("Last checker succeeded,"

2626

" keeping {0} enabled"

2627

.format(client_name))

2687

" keeping {} enabled".format(

2688

client_name))

2628

2689

try:

2629

client["secret"] = (

2630

pgp.decrypt(client["encrypted_secret"],

2631

client_settings[client_name]

2632

["secret"]))

2690

client["secret"] = pgp.decrypt(

2691

client["encrypted_secret"],

2692

client_settings[client_name]["secret"])

2633

2693

except PGPError:

2634

2694

# If decryption fails, we use secret from new settings

2635

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

2636

.format(client_name))

2637

client["secret"] = (

2638

client_settings[client_name]["secret"])

2695

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

2696

client_name))

2697

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

2698

["secret"])

2639

2699

2640

2700

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

2641

2701

for client_name in (set(old_client_settings)

2646

2706

clients_data[client_name] = client_settings[client_name]

2647

2707

2648

2708

# Create all client objects

2649

for client_name, client in clients_data.iteritems():

2709

for client_name, client in clients_data.items():

2650

2710

tcp_server.clients[client_name] = client_class(

2651

name = client_name, settings = client,

2711

name = client_name,

2712

settings = client,

2652

2713

server_settings = server_settings)

2653

2714

2654

2715

if not tcp_server.clients:

2656

2717

2657

2718

if not foreground:

2658

2719

if pidfile is not None:

2720

pid = os.getpid()

2659

2721

try:

2660

2722

with pidfile:

2661

pid = os.getpid()

2662

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

2723

print(pid, file=pidfile)

2663

2724

except IOError:

2664

2725

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

2665

2726

pidfilename, pid)

2670

2731

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

2671

2732

2672

2733

if use_dbus:

2673

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

2674

"se.bsnet.fukt.Mandos"})

2734

2735

@alternate_dbus_interfaces(

2736

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

2675

2737

class MandosDBusService(DBusObjectWithProperties):

2676

2738

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

2739

2677

2740

def __init__(self):

2678

2741

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

2742

2679

2743

_interface = "se.recompile.Mandos"

2680

2744

2681

2745

@dbus_interface_annotations(_interface)

2682

2746

def _foo(self):

2683

return { "org.freedesktop.DBus.Property"

2684

".EmitsChangedSignal":

2685

"false"}

2747

return {

2748

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

2749

"false" }

2686

2750

2687

2751

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

2688

2752

def ClientAdded(self, objpath):

2702

2766

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

2703

2767

def GetAllClients(self):

2704

2768

"D-Bus method"

2705

return dbus.Array(c.dbus_object_path

2706

for c in

2769

return dbus.Array(c.dbus_object_path for c in

2707

2770

tcp_server.clients.itervalues())

2708

2771

2709

2772

@dbus.service.method(_interface,

2711

2774

def GetAllClientsWithProperties(self):

2712

2775

"D-Bus method"

2713

2776

return dbus.Dictionary(

2714

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

2715

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

2777

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

2778

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

2716

2779

signature="oa{sv}")

2717

2780

2718

2781

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

2735

2798

2736

2799

def cleanup():

2737

2800

"Cleanup function; run on exit"

2738

service.cleanup()

2801

if zeroconf:

2802

service.cleanup()

2739

2803

2740

2804

multiprocessing.active_children()

2741

2805

wnull.close()

2755

2819

2756

2820

# A list of attributes that can not be pickled

2757

2821

# + secret.

2758

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

2759

"checker", "server_settings"))

2760

for name, typ in (inspect.getmembers

2761

(dbus.service.Object)):

2822

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

2823

"checker", "server_settings" }

2824

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

2825

.Object):

2762

2826

exclude.add(name)

2763

2827

2764

2828

client_dict["encrypted_secret"] = (client

2771

2835

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

2772

2836

2773

2837

try:

2774

with (tempfile.NamedTemporaryFile

2775

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

2776

dir=os.path.dirname(stored_state_path),

2777

delete=False)) as stored_state:

2838

with tempfile.NamedTemporaryFile(

2839

mode='wb',

2840

suffix=".pickle",

2841

prefix='clients-',

2842

dir=os.path.dirname(stored_state_path),

2843

delete=False) as stored_state:

2778

2844

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

2779

tempname=stored_state.name

2845

tempname = stored_state.name

2780

2846

os.rename(tempname, stored_state_path)

2781

2847

except (IOError, OSError) as e:

2782

2848

if not debug:

2785

2851

except NameError:

2786

2852

pass

2787

2853

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

2788

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

2854

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

2789

2855

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

2790

2856

else:

2791

2857

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

2792

2858

exc_info=e)

2793

raise e

2859

raise

2794

2860

2795

2861

# Delete all clients, and settings from config

2796

2862

while tcp_server.clients:

2801

2867

client.disable(quiet=True)

2802

2868

if use_dbus:

2803

2869

# Emit D-Bus signal

2804

mandos_dbus_service.ClientRemoved(client

2805

.dbus_object_path,

2806

client.name)

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

2807

2872

client_settings.clear()

2808

2873

2809

2874

atexit.register(cleanup)

2820

2885

tcp_server.server_activate()

2821

2886

2822

2887

# Find out what port we got

2823

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

2888

if zeroconf:

2889

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

2824

2890

if use_ipv6:

2825

2891

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

2826

2892

" flowinfo %d, scope_id %d",

2832

2898

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

2833

2899

2834

2900

try:

2835

# From the Avahi example code

2836

try:

2837

service.activate()

2838

except dbus.exceptions.DBusException as error:

2839

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

2840

cleanup()

2841

sys.exit(1)

2842

# End of Avahi example code

2901

if zeroconf:

2902

# From the Avahi example code

2903

try:

2904

service.activate()

2905

except dbus.exceptions.DBusException as error:

2906

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

2907

cleanup()

2908

sys.exit(1)

2909

# End of Avahi example code

2843

2910

2844

2911

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

2845

2912

lambda *args, **kwargs:

2860

2927

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

2861

2928

cleanup()

2862

2929

2930

2863

2931

if __name__ == '__main__':

2864

2932

main()