/mandos/release : revision 237.7.335

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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__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import 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 = "1.4.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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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.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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ctypes.util.find_library("c")).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(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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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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"""Exception if encryption/decryption fails"""

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pass

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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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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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os.rmdir(os.path.join(root, dirname))

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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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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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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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.server = None

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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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syslogger.setFormatter(logging.Formatter

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

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

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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("DBusException: %s", 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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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self .entry_group_state_changed))

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'StateChanged', self.entry_group_state_changed))

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logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(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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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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dbus.exceptions.DBusException):

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pass

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self.group = None

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self.remove()

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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" }

384

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()

249

397

elif state == avahi.SERVER_RUNNING:

250

self.add()

398

try:

399

self.add()

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except dbus.exceptions.DBusException as error:

401

if (error.get_dbus_name()

402

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

403

logger.info("Local Zeroconf service name"

404

" collision.")

405

return self.rename(remove=False)

406

else:

407

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

408

self.cleanup()

409

os._exit(1)

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else:

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411

if error is None:

253

412

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

254

413

else:

255

414

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

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256

416

def activate(self):

257

417

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

258

418

if self.server is None:

262

422

follow_name_owner_changes=True),

263

423

avahi.DBUS_INTERFACE_SERVER)

264

424

self.server.connect_to_signal("StateChanged",

265

self.server_state_changed)

425

self.server_state_changed)

266

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

267

427

268

428

269

def _timedelta_to_milliseconds(td):

270

"Convert a datetime.timedelta() to milliseconds"

271

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

272

+ (td.seconds * 1000)

273

+ (td.microseconds // 1000))

274

429

class AvahiServiceToSyslog(AvahiService):

430

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

431

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

432

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

433

syslogger.setFormatter(logging.Formatter(

434

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

435

.format(self.name)))

436

return ret

437

438

def call_pipe(connection, # : multiprocessing.Connection

439

func, *args, **kwargs):

440

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

441

442

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

443

return value on the provided multiprocessing.Connection.

444

"""

445

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

446

connection.close()

447

275

448

class Client(object):

276

449

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

277

450

278

451

Attributes:

279

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

452

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

280

453

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

281

454

approval_duration: datetime.timedelta(); Duration of one approval

282

455

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

289

462

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

290

463

checker_initiator_tag: a gobject event source tag, or None

291

464

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

465

client_structure: Object describing what attributes a client has

466

and is used for storing the client at exit

292

467

current_checker_command: string; current running checker_command

293

disable_hook: If set, called by disable() as disable_hook(self)

294

468

disable_initiator_tag: a gobject event source tag, or None

295

469

enabled: bool()

296

470

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

299

473

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

300

474

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

301

475

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

302

last_enabled: datetime.datetime(); (UTC)

476

last_checker_status: integer between 0 and 255 reflecting exit

477

status of last checker. -1 reflects crashed

478

checker, -2 means no checker completed yet.

479

last_checker_signal: The signal which killed the last checker, if

480

last_checker_status is -1

481

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

303

482

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

304

483

D-Bus identifiers

305

484

secret: bytestring; sent verbatim (over TLS) to client

306

485

timeout: datetime.timedelta(); How long from last_checked_ok

307

486

until this client is disabled

308

extended_timeout: extra long timeout when password has been sent

487

extended_timeout: extra long timeout when secret has been sent

309

488

runtime_expansions: Allowed attributes for runtime expansion.

310

489

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

311

490

disabled, or None

491

server_settings: The server_settings dict from main()

312

492

"""

313

493

314

494

runtime_expansions = ("approval_delay", "approval_duration",

315

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

316

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

495

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

496

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

497

"last_approval_request", "last_checked_ok",

317

498

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

318

319

def timeout_milliseconds(self):

320

"Return the 'timeout' attribute in milliseconds"

321

return _timedelta_to_milliseconds(self.timeout)

322

323

def extended_timeout_milliseconds(self):

324

"Return the 'extended_timeout' attribute in milliseconds"

325

return _timedelta_to_milliseconds(self.extended_timeout)

326

327

def interval_milliseconds(self):

328

"Return the 'interval' attribute in milliseconds"

329

return _timedelta_to_milliseconds(self.interval)

330

331

def approval_delay_milliseconds(self):

332

return _timedelta_to_milliseconds(self.approval_delay)

333

334

def __init__(self, name = None, disable_hook=None, config=None):

335

"""Note: the 'checker' key in 'config' sets the

336

'checker_command' attribute and *not* the 'checker'

337

attribute."""

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

}

510

511

@staticmethod

512

def config_parser(config):

513

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

514

{ client_name: {setting_name: value, ...}, ...}

515

with exceptions for any special settings as defined above.

516

NOTE: Must be a pure function. Must return the same result

517

value given the same arguments.

518

"""

519

settings = {}

520

for client_name in config.sections():

521

section = dict(config.items(client_name))

522

client = settings[client_name] = {}

523

524

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

525

# Reformat values from string types to Python types

526

client["approved_by_default"] = config.getboolean(

527

client_name, "approved_by_default")

528

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

529

"enabled")

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

534

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

535

.replace(" ", ""))

536

if "secret" in section:

537

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

538

elif "secfile" in section:

539

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

540

(section["secfile"])),

541

"rb") as secfile:

542

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

543

else:

544

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

545

.format(section))

546

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

547

client["extended_timeout"] = string_to_delta(

548

section["extended_timeout"])

549

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

550

client["approval_delay"] = string_to_delta(

551

section["approval_delay"])

552

client["approval_duration"] = string_to_delta(

553

section["approval_duration"])

554

client["checker_command"] = section["checker"]

555

client["last_approval_request"] = None

556

client["last_checked_ok"] = None

557

client["last_checker_status"] = -2

558

559

return settings

560

561

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

338

562

self.name = name

339

if config is None:

340

config = {}

563

if server_settings is None:

564

server_settings = {}

565

self.server_settings = server_settings

566

# adding all client settings

567

for setting, value in settings.items():

568

setattr(self, setting, value)

569

570

if self.enabled:

571

if not hasattr(self, "last_enabled"):

572

self.last_enabled = datetime.datetime.utcnow()

573

if not hasattr(self, "expires"):

574

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

575

+ self.timeout)

576

else:

577

self.last_enabled = None

578

self.expires = None

579

341

580

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

342

# Uppercase and remove spaces from fingerprint for later

343

# comparison purposes with return value from the fingerprint()

344

# function

345

self.fingerprint = (config["fingerprint"].upper()

346

.replace(" ", ""))

347

581

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

348

if "secret" in config:

349

self.secret = config["secret"].decode("base64")

350

elif "secfile" in config:

351

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

352

(config["secfile"])),

353

"rb") as secfile:

354

self.secret = secfile.read()

355

else:

356

raise TypeError("No secret or secfile for client %s"

357

% self.name)

358

self.host = config.get("host", "")

359

self.created = datetime.datetime.utcnow()

360

self.enabled = False

361

self.last_approval_request = None

362

self.last_enabled = None

363

self.last_checked_ok = None

364

self.timeout = string_to_delta(config["timeout"])

365

self.extended_timeout = string_to_delta(config

366

["extended_timeout"])

367

self.interval = string_to_delta(config["interval"])

368

self.disable_hook = disable_hook

582

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

583

datetime.datetime.utcnow())

584

585

# attributes specific for this server instance

369

586

self.checker = None

370

587

self.checker_initiator_tag = None

371

588

self.disable_initiator_tag = None

372

self.expires = None

373

589

self.checker_callback_tag = None

374

self.checker_command = config["checker"]

375

590

self.current_checker_command = None

376

self.last_connect = None

377

self._approved = None

378

self.approved_by_default = config.get("approved_by_default",

379

True)

591

self.approved = None

380

592

self.approvals_pending = 0

381

self.approval_delay = string_to_delta(

382

config["approval_delay"])

383

self.approval_duration = string_to_delta(

384

config["approval_duration"])

385

self.changedstate = (multiprocessing_manager

386

.Condition(multiprocessing_manager

387

.Lock()))

593

self.changedstate = multiprocessing_manager.Condition(

594

multiprocessing_manager.Lock())

595

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

597

if not attr.startswith("_")]

598

self.client_structure.append("client_structure")

599

600

for name, t in inspect.getmembers(

601

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

602

if not name.startswith("_"):

603

self.client_structure.append(name)

388

604

605

# Send notice to process children that client state has changed

389

606

def send_changedstate(self):

390

self.changedstate.acquire()

391

self.changedstate.notify_all()

392

self.changedstate.release()

607

with self.changedstate:

608

self.changedstate.notify_all()

393

609

394

610

def enable(self):

395

611

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

396

612

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

397

613

# Already enabled

398

614

return

399

self.send_changedstate()

400

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

401

# and every interval from then on.

402

self.checker_initiator_tag = (gobject.timeout_add

403

(self.interval_milliseconds(),

404

self.start_checker))

405

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

406

615

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

407

self.disable_initiator_tag = (gobject.timeout_add

408

(self.timeout_milliseconds(),

409

self.disable))

410

616

self.enabled = True

411

617

self.last_enabled = datetime.datetime.utcnow()

412

# Also start a new checker *right now*.

413

self.start_checker()

618

self.init_checker()

619

self.send_changedstate()

414

620

415

621

def disable(self, quiet=True):

416

622

"""Disable this client."""

417

623

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

418

624

return False

419

625

if not quiet:

420

self.send_changedstate()

421

if not quiet:

422

626

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

423

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

627

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

424

628

gobject.source_remove(self.disable_initiator_tag)

425

629

self.disable_initiator_tag = None

426

630

self.expires = None

427

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

631

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

428

632

gobject.source_remove(self.checker_initiator_tag)

429

633

self.checker_initiator_tag = None

430

634

self.stop_checker()

431

if self.disable_hook:

432

self.disable_hook(self)

433

635

self.enabled = False

636

if not quiet:

637

self.send_changedstate()

434

638

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

435

639

return False

436

640

437

641

def __del__(self):

438

self.disable_hook = None

439

642

self.disable()

440

643

441

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

644

def init_checker(self):

645

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

646

# and every interval from then on.

647

if self.checker_initiator_tag is not None:

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

650

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

651

self.start_checker)

652

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

653

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

656

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

657

# Also start a new checker *right now*.

658

self.start_checker()

659

660

def checker_callback(self, source, condition, connection,

661

command):

442

662

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

443

663

self.checker_callback_tag = None

444

664

self.checker = None

445

if os.WIFEXITED(condition):

446

exitstatus = os.WEXITSTATUS(condition)

447

if exitstatus == 0:

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

672

if self.last_checker_status == 0:

448

673

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

449

674

vars(self))

450

675

self.checked_ok()

451

676

else:

452

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

453

vars(self))

677

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

454

678

else:

679

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

455

681

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

456

682

vars(self))

457

458

def checked_ok(self, timeout=None):

459

"""Bump up the timeout for this client.

460

461

This should only be called when the client has been seen,

462

alive and well.

463

"""

683

return False

684

685

def checked_ok(self):

686

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

687

self.last_checked_ok = datetime.datetime.utcnow()

688

self.last_checker_status = 0

689

self.last_checker_signal = None

690

self.bump_timeout()

691

692

def bump_timeout(self, timeout=None):

693

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

464

694

if timeout is None:

465

695

timeout = self.timeout

466

self.last_checked_ok = datetime.datetime.utcnow()

467

696

if self.disable_initiator_tag is not None:

468

697

gobject.source_remove(self.disable_initiator_tag)

698

self.disable_initiator_tag = None

469

699

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

470

self.disable_initiator_tag = (gobject.timeout_add

471

(_timedelta_to_milliseconds

472

(timeout), self.disable))

700

self.disable_initiator_tag = gobject.timeout_add(

701

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

473

702

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

474

703

475

704

def need_approval(self):

481

710

If a checker already exists, leave it running and do

482

711

nothing."""

483

712

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

484

# did that, then if a checker (for some reason) started

485

# running slowly and taking more than 'interval' time, the

486

# client would inevitably timeout, since no checker would get

487

# a chance to run to completion. If we instead leave running

713

# did that, and if a checker (for some reason) started running

714

# slowly and taking more than 'interval' time, then the client

715

# would inevitably timeout, since no checker would get a

716

# chance to run to completion. If we instead leave running

488

717

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

489

718

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

490

719

# should be.

491

720

492

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

493

try:

494

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

495

except (AttributeError, OSError) as error:

496

if (isinstance(error, OSError)

497

and error.errno != errno.ECHILD):

498

raise error

499

else:

500

if pid:

501

logger.warning("Checker was a zombie")

502

gobject.source_remove(self.checker_callback_tag)

503

self.checker_callback(pid, status,

504

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

505

725

# Start a new checker if needed

506

726

if self.checker is None:

727

# Escape attributes for the shell

728

escaped_attrs = {

729

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

730

for attr in self.runtime_expansions }

507

731

try:

508

# In case checker_command has exactly one % operator

509

command = self.checker_command % self.host

510

except TypeError:

511

# Escape attributes for the shell

512

escaped_attrs = dict(

513

(attr,

514

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

515

errors=

516

'replace')))

517

for attr in

518

self.runtime_expansions)

519

520

try:

521

command = self.checker_command % escaped_attrs

522

except TypeError as error:

523

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

524

' %s', self.checker_command, error)

525

return True # Try again later

732

command = self.checker_command % escaped_attrs

733

except TypeError as error:

734

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

735

self.checker_command,

736

exc_info=error)

737

return True # Try again later

526

738

self.current_checker_command = command

527

try:

528

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

529

command, self.name)

530

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

531

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

532

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

533

# always replaced by /dev/null.)

534

self.checker = subprocess.Popen(command,

535

close_fds=True,

536

shell=True, cwd="/")

537

self.checker_callback_tag = (gobject.child_watch_add

538

(self.checker.pid,

539

self.checker_callback,

540

data=command))

541

# The checker may have completed before the gobject

542

# watch was added. Check for this.

543

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

544

if pid:

545

gobject.source_remove(self.checker_callback_tag)

546

self.checker_callback(pid, status, command)

547

except OSError as error:

548

logger.error("Failed to start subprocess: %s",

549

error)

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)

550

764

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

551

765

return True

552

766

558

772

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

559

773

return

560

774

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

561

try:

562

os.kill(self.checker.pid, signal.SIGTERM)

563

#time.sleep(0.5)

564

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

565

# os.kill(self.checker.pid, signal.SIGKILL)

566

except OSError as error:

567

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

568

raise

775

self.checker.terminate()

569

776

self.checker = None

570

777

571

778

572

def dbus_service_property(dbus_interface, signature="v",

573

access="readwrite", byte_arrays=False):

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

574

783

"""Decorators for marking methods of a DBusObjectWithProperties to

575

784

become properties on the D-Bus.

576

785

585

794

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

586

795

if byte_arrays and signature != "ay":

587

796

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

588

" signature %r" % signature)

797

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

798

589

799

def decorator(func):

590

800

func._dbus_is_property = True

591

801

func._dbus_interface = dbus_interface

596

806

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

597

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

598

808

return func

809

810

return decorator

811

812

813

def dbus_interface_annotations(dbus_interface):

814

"""Decorator for marking functions returning interface annotations

815

816

Usage:

817

818

@dbus_interface_annotations("org.example.Interface")

819

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

820

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

821

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

822

"false"}

823

"""

824

825

def decorator(func):

826

func._dbus_is_interface = True

827

func._dbus_interface = dbus_interface

828

func._dbus_name = dbus_interface

829

return func

830

831

return decorator

832

833

834

def dbus_annotations(annotations):

835

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

836

Usage:

837

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

841

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

842

access="r")

843

def Property_dbus_property(self):

844

return dbus.Boolean(False)

845

846

See also the DBusObjectWithAnnotations class.

847

"""

848

849

def decorator(func):

850

func._dbus_annotations = annotations

851

return func

852

599

853

return decorator

600

854

601

855

602

856

class DBusPropertyException(dbus.exceptions.DBusException):

603

857

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

604

858

"""

605

def __unicode__(self):

606

return unicode(str(self))

859

pass

607

860

608

861

609

862

class DBusPropertyAccessException(DBusPropertyException):

618

871

pass

619

872

620

873

621

class DBusObjectWithProperties(dbus.service.Object):

874

class DBusObjectWithAnnotations(dbus.service.Object):

875

"""A D-Bus object with annotations.

876

877

Classes inheriting from this can use the dbus_annotations

878

decorator to add annotations to methods or signals.

879

"""

880

881

@staticmethod

882

def _is_dbus_thing(thing):

883

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

884

885

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

886

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

887

"""

888

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

889

False)

890

891

def _get_all_dbus_things(self, thing):

892

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

893

"""

894

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

895

athing.__get__(self))

896

for cls in self.__class__.__mro__

897

for name, athing in

898

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

899

900

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

901

out_signature = "s",

902

path_keyword = 'object_path',

903

connection_keyword = 'connection')

904

def Introspect(self, object_path, connection):

905

"""Overloading of standard D-Bus method.

906

907

Inserts annotation tags on methods and signals.

908

"""

909

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

910

connection)

911

try:

912

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

913

914

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

915

# Add annotation tags

916

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

917

for tag in if_tag.getElementsByTagName(typ):

918

annots = dict()

919

for name, prop in (self.

920

_get_all_dbus_things(typ)):

921

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

922

and prop._dbus_interface

923

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

924

annots.update(getattr(

925

prop, "_dbus_annotations", {}))

926

for name, value in annots.items():

927

ann_tag = document.createElement(

928

"annotation")

929

ann_tag.setAttribute("name", name)

930

ann_tag.setAttribute("value", value)

931

tag.appendChild(ann_tag)

932

# Add interface annotation tags

933

for annotation, value in dict(

934

itertools.chain.from_iterable(

935

annotations().items()

936

for name, annotations

937

in self._get_all_dbus_things("interface")

938

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

939

)).items():

940

ann_tag = document.createElement("annotation")

941

ann_tag.setAttribute("name", annotation)

942

ann_tag.setAttribute("value", value)

943

if_tag.appendChild(ann_tag)

944

# Fix argument name for the Introspect method itself

945

if (if_tag.getAttribute("name")

946

== dbus.INTROSPECTABLE_IFACE):

947

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

948

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

949

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

950

if (arg.getAttribute("direction")

951

== "out"):

952

arg.setAttribute("name",

953

"xml_data")

954

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

955

document.unlink()

956

except (AttributeError, xml.dom.DOMException,

957

xml.parsers.expat.ExpatError) as error:

958

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

959

exc_info=error)

960

return xmlstring

961

962

963

class DBusObjectWithProperties(DBusObjectWithAnnotations):

622

964

"""A D-Bus object with properties.

623

965

624

966

Classes inheriting from this can use the dbus_service_property

626

968

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

627

969

"""

628

970

629

@staticmethod

630

def _is_dbus_property(obj):

631

return getattr(obj, "_dbus_is_property", False)

632

633

def _get_all_dbus_properties(self):

634

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

635

"""

636

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

637

for cls in self.__class__.__mro__

638

for name, prop in

639

inspect.getmembers(cls, self._is_dbus_property))

640

641

971

def _get_dbus_property(self, interface_name, property_name):

642

972

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

643

973

property with the specified name and interface.

644

974

"""

645

for cls in self.__class__.__mro__:

646

for name, value in (inspect.getmembers

647

(cls, self._is_dbus_property)):

975

for cls in self.__class__.__mro__:

976

for name, value in inspect.getmembers(

977

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

648

978

if (value._dbus_name == property_name

649

979

and value._dbus_interface == interface_name):

650

980

return value.__get__(self)

651

981

652

982

# No such property

653

raise DBusPropertyNotFound(self.dbus_object_path + ":"

654

+ interface_name + "."

655

+ property_name)

656

657

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

983

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

984

self.dbus_object_path, interface_name, property_name))

985

986

@classmethod

987

def _get_all_interface_names(cls):

988

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

989

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

990

"_dbus_interface", None)

991

for x in (inspect.getmro(cls))

992

for attr in dir(x))

993

if name is not None)

994

995

@dbus.service.method(dbus.PROPERTIES_IFACE,

996

in_signature="ss",

658

997

out_signature="v")

659

998

def Get(self, interface_name, property_name):

660

999

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

678

1017

# The byte_arrays option is not supported yet on

679

1018

# signatures other than "ay".

680

1019

if prop._dbus_signature != "ay":

681

raise ValueError

682

value = dbus.ByteArray(''.join(unichr(byte)

683

for byte in value))

1020

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

1021

"'ay' signature {!r}"

1022

.format(prop._dbus_signature))

1023

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

1024

for byte in value))

684

1025

prop(value)

685

1026

686

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

1027

@dbus.service.method(dbus.PROPERTIES_IFACE,

1028

in_signature="s",

687

1029

out_signature="a{sv}")

688

1030

def GetAll(self, interface_name):

689

1031

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

691

1033

692

1034

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

693

1035

"""

694

all = {}

695

for name, prop in self._get_all_dbus_properties():

1036

properties = {}

1037

for name, prop in self._get_all_dbus_things("property"):

696

1038

if (interface_name

697

1039

and interface_name != prop._dbus_interface):

698

1040

# Interface non-empty but did not match

702

1044

continue

703

1045

value = prop()

704

1046

if not hasattr(value, "variant_level"):

705

all[name] = value

1047

properties[name] = value

706

1048

continue

707

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

708

value.variant_level+1)

709

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

1049

properties[name] = type(value)(

1050

value, variant_level = value.variant_level + 1)

1051

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

1052

1053

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

1054

def PropertiesChanged(self, interface_name, changed_properties,

1055

invalidated_properties):

1056

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

1057

standard.

1058

"""

1059

pass

710

1060

711

1061

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

712

1062

out_signature="s",

713

1063

path_keyword='object_path',

714

1064

connection_keyword='connection')

715

1065

def Introspect(self, object_path, connection):

716

"""Standard D-Bus method, overloaded to insert property tags.

1066

"""Overloading of standard D-Bus method.

1067

1068

Inserts property tags and interface annotation tags.

717

1069

"""

718

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

719

connection)

1070

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1071

object_path,

1072

connection)

720

1073

try:

721

1074

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

1075

722

1076

def make_tag(document, name, prop):

723

1077

e = document.createElement("property")

724

1078

e.setAttribute("name", name)

725

1079

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

726

1080

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

727

1081

return e

1082

728

1083

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

1084

# Add property tags

729

1085

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

730

1086

for name, prop

731

in self._get_all_dbus_properties()

1087

in self._get_all_dbus_things("property")

732

1088

if prop._dbus_interface

733

1089

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

734

1090

if_tag.appendChild(tag)

1091

# Add annotation tags for properties

1092

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

1093

annots = dict()

1094

for name, prop in self._get_all_dbus_things(

1095

"property"):

1096

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

1097

and prop._dbus_interface

1098

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

1099

annots.update(getattr(

1100

prop, "_dbus_annotations", {}))

1101

for name, value in annots.items():

1102

ann_tag = document.createElement(

1103

"annotation")

1104

ann_tag.setAttribute("name", name)

1105

ann_tag.setAttribute("value", value)

1106

tag.appendChild(ann_tag)

735

1107

# Add the names to the return values for the

736

1108

# "org.freedesktop.DBus.Properties" methods

737

1109

if (if_tag.getAttribute("name")

752

1124

except (AttributeError, xml.dom.DOMException,

753

1125

xml.parsers.expat.ExpatError) as error:

754

1126

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

755

error)

756

return xmlstring

757

758

759

def datetime_to_dbus (dt, variant_level=0):

1127

exc_info=error)

1128

return xmlstring

1129

1130

try:

1131

dbus.OBJECT_MANAGER_IFACE

1132

except AttributeError:

1133

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

1134

1135

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1136

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

1137

1138

Classes inheriting from this exposes the standard

1139

GetManagedObjects call and the InterfacesAdded and

1140

InterfacesRemoved signals on the standard

1141

"org.freedesktop.DBus.ObjectManager" interface.

1142

1143

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

1144

manually.

1145

"""

1146

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1147

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

1148

def GetManagedObjects(self):

1149

"""This function must be overridden"""

1150

raise NotImplementedError()

1151

1152

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1153

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

1154

def InterfacesAdded(self, object_path, interfaces_and_properties):

1155

pass

1156

1157

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

1158

def InterfacesRemoved(self, object_path, interfaces):

1159

pass

1160

1161

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1162

out_signature = "s",

1163

path_keyword = 'object_path',

1164

connection_keyword = 'connection')

1165

def Introspect(self, object_path, connection):

1166

"""Overloading of standard D-Bus method.

1167

1168

Override return argument name of GetManagedObjects to be

1169

"objpath_interfaces_and_properties"

1170

"""

1171

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1172

object_path,

1173

connection)

1174

try:

1175

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

1176

1177

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

1178

# Fix argument name for the GetManagedObjects method

1179

if (if_tag.getAttribute("name")

1180

== dbus.OBJECT_MANAGER_IFACE):

1181

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

1182

if (cn.getAttribute("name")

1183

== "GetManagedObjects"):

1184

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

1185

if (arg.getAttribute("direction")

1186

== "out"):

1187

arg.setAttribute(

1188

"name",

1189

"objpath_interfaces"

1190

"_and_properties")

1191

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

1192

document.unlink()

1193

except (AttributeError, xml.dom.DOMException,

1194

xml.parsers.expat.ExpatError) as error:

1195

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

1196

exc_info = error)

1197

return xmlstring

1198

1199

def datetime_to_dbus(dt, variant_level=0):

760

1200

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

761

1201

if dt is None:

762

1202

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

763

return dbus.String(dt.isoformat(),

764

variant_level=variant_level)

765

766

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

767

.__metaclass__):

768

"""Applied to an empty subclass of a D-Bus object, this metaclass

769

will add additional D-Bus attributes matching a certain pattern.

1203

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

1204

1205

1206

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1207

"""A class decorator; applied to a subclass of

1208

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

1209

interface names according to the "alt_interface_names" mapping.

1210

Usage:

1211

1212

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

1213

"net.example.AlternateInterface"})

1214

class SampleDBusObject(dbus.service.Object):

1215

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

1216

def SampleDBusMethod():

1217

pass

1218

1219

The above "SampleDBusMethod" on "SampleDBusObject" will be

1220

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

1221

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

1222

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

1223

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

1224

1225

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

1226

(from DBusObjectWithProperties) and interfaces (from the

1227

dbus_interface_annotations decorator).

770

1228

"""

771

def __new__(mcs, name, bases, attr):

772

# Go through all the base classes which could have D-Bus

773

# methods, signals, or properties in them

774

for base in (b for b in bases

775

if issubclass(b, dbus.service.Object)):

776

# Go though all attributes of the base class

777

for attrname, attribute in inspect.getmembers(base):

1229

1230

def wrapper(cls):

1231

for orig_interface_name, alt_interface_name in (

1232

alt_interface_names.items()):

1233

attr = {}

1234

interface_names = set()

1235

# Go though all attributes of the class

1236

for attrname, attribute in inspect.getmembers(cls):

778

1237

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

779

1238

# with the wrong interface name

780

1239

if (not hasattr(attribute, "_dbus_interface")

781

or not attribute._dbus_interface

782

.startswith("se.recompile.Mandos")):

1240

or not attribute._dbus_interface.startswith(

1241

orig_interface_name)):

783

1242

continue

784

1243

# Create an alternate D-Bus interface name based on

785

1244

# the current name

786

alt_interface = (attribute._dbus_interface

787

.replace("se.recompile.Mandos",

788

"se.bsnet.fukt.Mandos"))

1245

alt_interface = attribute._dbus_interface.replace(

1246

orig_interface_name, alt_interface_name)

1247

interface_names.add(alt_interface)

789

1248

# Is this a D-Bus signal?

790

1249

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

791

# Extract the original non-method function by

792

# black magic

793

nonmethod_func = (dict(

1250

if sys.version_info.major == 2:

1251

# Extract the original non-method undecorated

1252

# function by black magic

1253

nonmethod_func = (dict(

794

1254

zip(attribute.func_code.co_freevars,

795

attribute.__closure__))["func"]

796

.cell_contents)

1255

attribute.__closure__))

1256

["func"].cell_contents)

1257

else:

1258

nonmethod_func = attribute

797

1259

# Create a new, but exactly alike, function

798

1260

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

799

1261

# with the alternate D-Bus interface name

800

new_function = (dbus.service.signal

801

(alt_interface,

802

attribute._dbus_signature)

803

(types.FunctionType(

804

nonmethod_func.func_code,

805

nonmethod_func.func_globals,

806

nonmethod_func.func_name,

807

nonmethod_func.func_defaults,

808

nonmethod_func.func_closure)))

1262

if sys.version_info.major == 2:

1263

new_function = types.FunctionType(

1264

nonmethod_func.func_code,

1265

nonmethod_func.func_globals,

1266

nonmethod_func.func_name,

1267

nonmethod_func.func_defaults,

1268

nonmethod_func.func_closure)

1269

else:

1270

new_function = types.FunctionType(

1271

nonmethod_func.__code__,

1272

nonmethod_func.__globals__,

1273

nonmethod_func.__name__,

1274

nonmethod_func.__defaults__,

1275

nonmethod_func.__closure__)

1276

new_function = (dbus.service.signal(

1277

alt_interface,

1278

attribute._dbus_signature)(new_function))

1279

# Copy annotations, if any

1280

try:

1281

new_function._dbus_annotations = dict(

1282

attribute._dbus_annotations)

1283

except AttributeError:

1284

pass

809

1285

# Define a creator of a function to call both the

810

# old and new functions, so both the old and new

811

# signals gets sent when the function is called

1286

# original and alternate functions, so both the

1287

# original and alternate signals gets sent when

1288

# the function is called

812

1289

def fixscope(func1, func2):

813

1290

"""This function is a scope container to pass

814

1291

func1 and func2 to the "call_both" function

815

1292

outside of its arguments"""

1293

1294

@functools.wraps(func2)

816

1295

def call_both(*args, **kwargs):

817

1296

"""This function will emit two D-Bus

818

1297

signals by calling func1 and func2"""

819

1298

func1(*args, **kwargs)

820

1299

func2(*args, **kwargs)

1300

# Make wrapper function look like a D-Bus signal

1301

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

1302

if name.startswith("_dbus_"):

1303

setattr(call_both, name, attr)

1304

821

1305

return call_both

822

1306

# Create the "call_both" function and add it to

823

1307

# the class

824

attr[attrname] = fixscope(attribute,

825

new_function)

1308

attr[attrname] = fixscope(attribute, new_function)

826

1309

# Is this a D-Bus method?

827

1310

elif getattr(attribute, "_dbus_is_method", False):

828

1311

# Create a new, but exactly alike, function

829

1312

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

830

1313

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

831

1314

# to the class.

832

attr[attrname] = (dbus.service.method

833

(alt_interface,

834

attribute._dbus_in_signature,

835

attribute._dbus_out_signature)

836

(types.FunctionType

837

(attribute.func_code,

838

attribute.func_globals,

839

attribute.func_name,

840

attribute.func_defaults,

841

attribute.func_closure)))

1315

attr[attrname] = (

1316

dbus.service.method(

1317

alt_interface,

1318

attribute._dbus_in_signature,

1319

attribute._dbus_out_signature)

1320

(types.FunctionType(attribute.func_code,

1321

attribute.func_globals,

1322

attribute.func_name,

1323

attribute.func_defaults,

1324

attribute.func_closure)))

1325

# Copy annotations, if any

1326

try:

1327

attr[attrname]._dbus_annotations = dict(

1328

attribute._dbus_annotations)

1329

except AttributeError:

1330

pass

842

1331

# Is this a D-Bus property?

843

1332

elif getattr(attribute, "_dbus_is_property", False):

844

1333

# Create a new, but exactly alike, function

845

1334

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

846

1335

# property with the alternate D-Bus interface

847

1336

# name. Add it to the class.

848

attr[attrname] = (dbus_service_property

849

(alt_interface,

850

attribute._dbus_signature,

851

attribute._dbus_access,

852

attribute

853

._dbus_get_args_options

854

["byte_arrays"])

855

(types.FunctionType

856

(attribute.func_code,

857

attribute.func_globals,

858

attribute.func_name,

859

attribute.func_defaults,

860

attribute.func_closure)))

861

return type.__new__(mcs, name, bases, attr)

862

1337

attr[attrname] = (dbus_service_property(

1338

alt_interface, attribute._dbus_signature,

1339

attribute._dbus_access,

1340

attribute._dbus_get_args_options

1341

["byte_arrays"])

1342

(types.FunctionType(

1343

attribute.func_code,

1344

attribute.func_globals,

1345

attribute.func_name,

1346

attribute.func_defaults,

1347

attribute.func_closure)))

1348

# Copy annotations, if any

1349

try:

1350

attr[attrname]._dbus_annotations = dict(

1351

attribute._dbus_annotations)

1352

except AttributeError:

1353

pass

1354

# Is this a D-Bus interface?

1355

elif getattr(attribute, "_dbus_is_interface", False):

1356

# Create a new, but exactly alike, function

1357

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

1358

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

1359

# to the class.

1360

attr[attrname] = (

1361

dbus_interface_annotations(alt_interface)

1362

(types.FunctionType(attribute.func_code,

1363

attribute.func_globals,

1364

attribute.func_name,

1365

attribute.func_defaults,

1366

attribute.func_closure)))

1367

if deprecate:

1368

# Deprecate all alternate interfaces

1369

iname="_AlternateDBusNames_interface_annotation{}"

1370

for interface_name in interface_names:

1371

1372

@dbus_interface_annotations(interface_name)

1373

def func(self):

1374

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

1375

"true" }

1376

# Find an unused name

1377

for aname in (iname.format(i)

1378

for i in itertools.count()):

1379

if aname not in attr:

1380

attr[aname] = func

1381

break

1382

if interface_names:

1383

# Replace the class with a new subclass of it with

1384

# methods, signals, etc. as created above.

1385

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

1386

(cls, ), attr)

1387

return cls

1388

1389

return wrapper

1390

1391

1392

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

1393

"se.bsnet.fukt.Mandos"})

863

1394

class ClientDBus(Client, DBusObjectWithProperties):

864

1395

"""A Client class using D-Bus

865

1396

869

1400

"""

870

1401

871

1402

runtime_expansions = (Client.runtime_expansions

872

+ ("dbus_object_path",))

1403

+ ("dbus_object_path", ))

1404

1405

_interface = "se.recompile.Mandos.Client"

873

1406

874

1407

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

875

1408

876

1409

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

877

self._approvals_pending = 0

878

1410

self.bus = bus

879

1411

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

880

1412

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

881

1413

# the D-Bus

882

client_object_name = unicode(self.name).translate(

1414

client_object_name = str(self.name).translate(

883

1415

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

884

1416

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

885

self.dbus_object_path = (dbus.ObjectPath

886

("/clients/" + client_object_name))

1417

self.dbus_object_path = dbus.ObjectPath(

1418

"/clients/" + client_object_name)

887

1419

DBusObjectWithProperties.__init__(self, self.bus,

888

1420

self.dbus_object_path)

889

890

def notifychangeproperty(transform_func,

891

dbus_name, type_func=lambda x: x,

892

variant_level=1):

1421

1422

def notifychangeproperty(transform_func, dbus_name,

1423

type_func=lambda x: x,

1424

variant_level=1,

1425

invalidate_only=False,

1426

_interface=_interface):

893

1427

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

894

1428

its changes to DBus.

895

1429

896

1430

transform_fun: Function that takes a value and a variant_level

897

1431

and transforms it to a D-Bus type.

898

1432

dbus_name: D-Bus name of the variable

900

1434

to the D-Bus. Default: no transform

901

1435

variant_level: D-Bus variant level. Default: 1

902

1436

"""

903

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

1437

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

1438

904

1439

def setter(self, value):

905

1440

if hasattr(self, "dbus_object_path"):

906

1441

if (not hasattr(self, attrname) or

907

1442

type_func(getattr(self, attrname, None))

908

1443

!= type_func(value)):

909

dbus_value = transform_func(type_func(value),

910

variant_level

911

=variant_level)

912

self.PropertyChanged(dbus.String(dbus_name),

913

dbus_value)

1444

if invalidate_only:

1445

self.PropertiesChanged(

1446

_interface, dbus.Dictionary(),

1447

dbus.Array((dbus_name, )))

1448

else:

1449

dbus_value = transform_func(

1450

type_func(value),

1451

variant_level = variant_level)

1452

self.PropertyChanged(dbus.String(dbus_name),

1453

dbus_value)

1454

self.PropertiesChanged(

1455

_interface,

1456

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

1457

dbus_value }),

1458

dbus.Array())

914

1459

setattr(self, attrname, value)

915

1460

916

1461

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

917

1462

918

919

1463

expires = notifychangeproperty(datetime_to_dbus, "Expires")

920

1464

approvals_pending = notifychangeproperty(dbus.Boolean,

921

1465

"ApprovalPending",

923

1467

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

924

1468

last_enabled = notifychangeproperty(datetime_to_dbus,

925

1469

"LastEnabled")

926

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

927

type_func = lambda checker:

928

checker is not None)

1470

checker = notifychangeproperty(

1471

dbus.Boolean, "CheckerRunning",

1472

type_func = lambda checker: checker is not None)

929

1473

last_checked_ok = notifychangeproperty(datetime_to_dbus,

930

1474

"LastCheckedOK")

1475

last_checker_status = notifychangeproperty(dbus.Int16,

1476

"LastCheckerStatus")

931

1477

last_approval_request = notifychangeproperty(

932

1478

datetime_to_dbus, "LastApprovalRequest")

933

1479

approved_by_default = notifychangeproperty(dbus.Boolean,

934

1480

"ApprovedByDefault")

935

approval_delay = notifychangeproperty(dbus.UInt16,

936

"ApprovalDelay",

937

type_func =

938

_timedelta_to_milliseconds)

1481

approval_delay = notifychangeproperty(

1482

dbus.UInt64, "ApprovalDelay",

1483

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

939

1484

approval_duration = notifychangeproperty(

940

dbus.UInt16, "ApprovalDuration",

941

type_func = _timedelta_to_milliseconds)

1485

dbus.UInt64, "ApprovalDuration",

1486

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

942

1487

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

943

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

944

type_func =

945

_timedelta_to_milliseconds)

1488

timeout = notifychangeproperty(

1489

dbus.UInt64, "Timeout",

1490

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

946

1491

extended_timeout = notifychangeproperty(

947

dbus.UInt16, "ExtendedTimeout",

948

type_func = _timedelta_to_milliseconds)

949

interval = notifychangeproperty(dbus.UInt16,

950

"Interval",

951

type_func =

952

_timedelta_to_milliseconds)

1492

dbus.UInt64, "ExtendedTimeout",

1493

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

1494

interval = notifychangeproperty(

1495

dbus.UInt64, "Interval",

1496

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

953

1497

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

1498

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

1499

invalidate_only=True)

954

1500

955

1501

del notifychangeproperty

956

1502

963

1509

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

964

1510

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

965

1511

966

def checker_callback(self, pid, condition, command,

967

*args, **kwargs):

968

self.checker_callback_tag = None

969

self.checker = None

970

if os.WIFEXITED(condition):

971

exitstatus = os.WEXITSTATUS(condition)

1512

def checker_callback(self, source, condition,

1513

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

1514

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

1515

connection, command, *args,

1516

**kwargs)

1517

exitstatus = self.last_checker_status

1518

if exitstatus >= 0:

972

1519

# Emit D-Bus signal

973

1520

self.CheckerCompleted(dbus.Int16(exitstatus),

974

dbus.Int64(condition),

1521

# This is specific to GNU libC

1522

dbus.Int64(exitstatus << 8),

975

1523

dbus.String(command))

976

1524

else:

977

1525

# Emit D-Bus signal

978

1526

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

979

dbus.Int64(condition),

1527

dbus.Int64(

1528

# This is specific to GNU libC

1529

(exitstatus << 8)

1530

| self.last_checker_signal),

980

1531

dbus.String(command))

981

982

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

983

*args, **kwargs)

1532

return ret

984

1533

985

1534

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

986

old_checker = self.checker

987

if self.checker is not None:

988

old_checker_pid = self.checker.pid

989

else:

990

old_checker_pid = None

1535

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

991

1536

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

992

1537

# Only if new checker process was started

993

1538

if (self.checker is not None

997

1542

return r

998

1543

999

1544

def _reset_approved(self):

1000

self._approved = None

1545

self.approved = None

1001

1546

return False

1002

1547

1003

1548

def approve(self, value=True):

1549

self.approved = value

1550

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

1551

* 1000), self._reset_approved)

1004

1552

self.send_changedstate()

1005

self._approved = value

1006

gobject.timeout_add(_timedelta_to_milliseconds

1007

(self.approval_duration),

1008

self._reset_approved)

1009

1010

1553

1011

1554

## D-Bus methods, signals & properties

1012

_interface = "se.recompile.Mandos.Client"

1555

1556

## Interfaces

1013

1557

1014

1558

## Signals

1015

1559

1026

1570

pass

1027

1571

1028

1572

# PropertyChanged - signal

1573

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

1029

1574

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

1030

1575

def PropertyChanged(self, property, value):

1031

1576

"D-Bus signal"

1065

1610

self.checked_ok()

1066

1611

1067

1612

# Enable - method

1613

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

1068

1614

@dbus.service.method(_interface)

1069

1615

def Enable(self):

1070

1616

"D-Bus method"

1071

1617

self.enable()

1072

1618

1073

1619

# StartChecker - method

1620

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

1074

1621

@dbus.service.method(_interface)

1075

1622

def StartChecker(self):

1076

1623

"D-Bus method"

1077

1624

self.start_checker()

1078

1625

1079

1626

# Disable - method

1627

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

1080

1628

@dbus.service.method(_interface)

1081

1629

def Disable(self):

1082

1630

"D-Bus method"

1083

1631

self.disable()

1084

1632

1085

1633

# StopChecker - method

1634

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

1086

1635

@dbus.service.method(_interface)

1087

1636

def StopChecker(self):

1088

1637

self.stop_checker()

1095

1644

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

1096

1645

1097

1646

# ApprovedByDefault - property

1098

@dbus_service_property(_interface, signature="b",

1647

@dbus_service_property(_interface,

1648

signature="b",

1099

1649

access="readwrite")

1100

1650

def ApprovedByDefault_dbus_property(self, value=None):

1101

1651

if value is None: # get

1103

1653

self.approved_by_default = bool(value)

1104

1654

1105

1655

# ApprovalDelay - property

1106

@dbus_service_property(_interface, signature="t",

1656

@dbus_service_property(_interface,

1657

signature="t",

1107

1658

access="readwrite")

1108

1659

def ApprovalDelay_dbus_property(self, value=None):

1109

1660

if value is None: # get

1110

return dbus.UInt64(self.approval_delay_milliseconds())

1661

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

1662

* 1000)

1111

1663

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

1112

1664

1113

1665

# ApprovalDuration - property

1114

@dbus_service_property(_interface, signature="t",

1666

@dbus_service_property(_interface,

1667

signature="t",

1115

1668

access="readwrite")

1116

1669

def ApprovalDuration_dbus_property(self, value=None):

1117

1670

if value is None: # get

1118

return dbus.UInt64(_timedelta_to_milliseconds(

1119

self.approval_duration))

1671

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

1672

* 1000)

1120

1673

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

1121

1674

1122

1675

# Name - property

1676

@dbus_annotations(

1677

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

1123

1678

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

1124

1679

def Name_dbus_property(self):

1125

1680

return dbus.String(self.name)

1126

1681

1127

1682

# Fingerprint - property

1683

@dbus_annotations(

1684

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

1128

1685

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

1129

1686

def Fingerprint_dbus_property(self):

1130

1687

return dbus.String(self.fingerprint)

1131

1688

1132

1689

# Host - property

1133

@dbus_service_property(_interface, signature="s",

1690

@dbus_service_property(_interface,

1691

signature="s",

1134

1692

access="readwrite")

1135

1693

def Host_dbus_property(self, value=None):

1136

1694

if value is None: # get

1137

1695

return dbus.String(self.host)

1138

self.host = value

1696

self.host = str(value)

1139

1697

1140

1698

# Created - property

1699

@dbus_annotations(

1700

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

1141

1701

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

1142

1702

def Created_dbus_property(self):

1143

return dbus.String(datetime_to_dbus(self.created))

1703

return datetime_to_dbus(self.created)

1144

1704

1145

1705

# LastEnabled - property

1146

1706

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

1148

1708

return datetime_to_dbus(self.last_enabled)

1149

1709

1150

1710

# Enabled - property

1151

@dbus_service_property(_interface, signature="b",

1711

@dbus_service_property(_interface,

1712

signature="b",

1152

1713

access="readwrite")

1153

1714

def Enabled_dbus_property(self, value=None):

1154

1715

if value is None: # get

1159

1720

self.disable()

1160

1721

1161

1722

# LastCheckedOK - property

1162

@dbus_service_property(_interface, signature="s",

1723

@dbus_service_property(_interface,

1724

signature="s",

1163

1725

access="readwrite")

1164

1726

def LastCheckedOK_dbus_property(self, value=None):

1165

1727

if value is not None:

1167

1729

return

1168

1730

return datetime_to_dbus(self.last_checked_ok)

1169

1731

1732

# LastCheckerStatus - property

1733

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

1734

def LastCheckerStatus_dbus_property(self):

1735

return dbus.Int16(self.last_checker_status)

1736

1170

1737

# Expires - property

1171

1738

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

1172

1739

def Expires_dbus_property(self):

1178

1745

return datetime_to_dbus(self.last_approval_request)

1179

1746

1180

1747

# Timeout - property

1181

@dbus_service_property(_interface, signature="t",

1748

@dbus_service_property(_interface,

1749

signature="t",

1182

1750

access="readwrite")

1183

1751

def Timeout_dbus_property(self, value=None):

1184

1752

if value is None: # get

1185

return dbus.UInt64(self.timeout_milliseconds())

1753

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

1754

old_timeout = self.timeout

1186

1755

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

1187

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

1188

return

1189

# Reschedule timeout

1190

gobject.source_remove(self.disable_initiator_tag)

1191

self.disable_initiator_tag = None

1192

self.expires = None

1193

time_to_die = _timedelta_to_milliseconds((self

1194

.last_checked_ok

1195

+ self.timeout)

1196

- datetime.datetime

1197

.utcnow())

1198

if time_to_die <= 0:

1199

# The timeout has passed

1200

self.disable()

1201

else:

1202

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

1203

+ datetime.timedelta(milliseconds =

1204

time_to_die))

1205

self.disable_initiator_tag = (gobject.timeout_add

1206

(time_to_die, self.disable))

1756

# Reschedule disabling

1757

if self.enabled:

1758

now = datetime.datetime.utcnow()

1759

self.expires += self.timeout - old_timeout

1760

if self.expires <= now:

1761

# The timeout has passed

1762

self.disable()

1763

else:

1764

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

1765

is None):

1766

return

1767

gobject.source_remove(self.disable_initiator_tag)

1768

self.disable_initiator_tag = gobject.timeout_add(

1769

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

1770

self.disable)

1207

1771

1208

1772

# ExtendedTimeout - property

1209

@dbus_service_property(_interface, signature="t",

1773

@dbus_service_property(_interface,

1774

signature="t",

1210

1775

access="readwrite")

1211

1776

def ExtendedTimeout_dbus_property(self, value=None):

1212

1777

if value is None: # get

1213

return dbus.UInt64(self.extended_timeout_milliseconds())

1778

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

1779

* 1000)

1214

1780

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

1215

1781

1216

1782

# Interval - property

1217

@dbus_service_property(_interface, signature="t",

1783

@dbus_service_property(_interface,

1784

signature="t",

1218

1785

access="readwrite")

1219

1786

def Interval_dbus_property(self, value=None):

1220

1787

if value is None: # get

1221

return dbus.UInt64(self.interval_milliseconds())

1788

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

1222

1789

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

1223

1790

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

1224

1791

return

1225

# Reschedule checker run

1226

gobject.source_remove(self.checker_initiator_tag)

1227

self.checker_initiator_tag = (gobject.timeout_add

1228

(value, self.start_checker))

1229

self.start_checker() # Start one now, too

1792

if self.enabled:

1793

# Reschedule checker run

1794

gobject.source_remove(self.checker_initiator_tag)

1795

self.checker_initiator_tag = gobject.timeout_add(

1796

value, self.start_checker)

1797

self.start_checker() # Start one now, too

1230

1798

1231

1799

# Checker - property

1232

@dbus_service_property(_interface, signature="s",

1800

@dbus_service_property(_interface,

1801

signature="s",

1233

1802

access="readwrite")

1234

1803

def Checker_dbus_property(self, value=None):

1235

1804

if value is None: # get

1236

1805

return dbus.String(self.checker_command)

1237

self.checker_command = value

1806

self.checker_command = str(value)

1238

1807

1239

1808

# CheckerRunning - property

1240

@dbus_service_property(_interface, signature="b",

1809

@dbus_service_property(_interface,

1810

signature="b",

1241

1811

access="readwrite")

1242

1812

def CheckerRunning_dbus_property(self, value=None):

1243

1813

if value is None: # get

1248

1818

self.stop_checker()

1249

1819

1250

1820

# ObjectPath - property

1821

@dbus_annotations(

1822

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

1823

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

1251

1824

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

1252

1825

def ObjectPath_dbus_property(self):

1253

1826

return self.dbus_object_path # is already a dbus.ObjectPath

1254

1827

1255

1828

# Secret = property

1256

@dbus_service_property(_interface, signature="ay",

1257

access="write", byte_arrays=True)

1829

@dbus_annotations(

1830

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

1831

"invalidates"})

1832

@dbus_service_property(_interface,

1833

signature="ay",

1834

access="write",

1835

byte_arrays=True)

1258

1836

def Secret_dbus_property(self, value):

1259

self.secret = str(value)

1837

self.secret = bytes(value)

1260

1838

1261

1839

del _interface

1262

1840

1266

1844

self._pipe = child_pipe

1267

1845

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

1268

1846

if not self._pipe.recv():

1269

raise KeyError()

1847

raise KeyError(fpr)

1270

1848

1271

1849

def __getattribute__(self, name):

1272

if(name == '_pipe'):

1850

if name == '_pipe':

1273

1851

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

1274

1852

self._pipe.send(('getattr', name))

1275

1853

data = self._pipe.recv()

1276

1854

if data[0] == 'data':

1277

1855

return data[1]

1278

1856

if data[0] == 'function':

1857

1279

1858

def func(*args, **kwargs):

1280

1859

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

1281

1860

return self._pipe.recv()[1]

1861

1282

1862

return func

1283

1863

1284

1864

def __setattr__(self, name, value):

1285

if(name == '_pipe'):

1865

if name == '_pipe':

1286

1866

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

1287

1867

self._pipe.send(('setattr', name, value))

1288

1868

1289

class ClientDBusTransitional(ClientDBus):

1290

__metaclass__ = AlternateDBusNamesMetaclass

1291

1869

1292

1870

class ClientHandler(socketserver.BaseRequestHandler, object):

1293

1871

"""A class to handle client connections.

1298

1876

def handle(self):

1299

1877

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

1300

1878

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

1301

unicode(self.client_address))

1879

str(self.client_address))

1302

1880

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

1303

1881

self.server.child_pipe.fileno())

1304

1882

1305

session = (gnutls.connection

1306

.ClientSession(self.request,

1307

gnutls.connection

1308

.X509Credentials()))

1883

session = gnutls.connection.ClientSession(

1884

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

1309

1885

1310

1886

# Note: gnutls.connection.X509Credentials is really a

1311

1887

# generic GnuTLS certificate credentials object so long as

1320

1896

priority = self.server.gnutls_priority

1321

1897

if priority is None:

1322

1898

priority = "NORMAL"

1323

(gnutls.library.functions

1324

.gnutls_priority_set_direct(session._c_object,

1325

priority, None))

1899

gnutls.library.functions.gnutls_priority_set_direct(

1900

session._c_object, priority, None)

1326

1901

1327

1902

# Start communication using the Mandos protocol

1328

1903

# Get protocol number

1330

1905

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

1331

1906

try:

1332

1907

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

1333

raise RuntimeError

1908

raise RuntimeError(line)

1334

1909

except (ValueError, IndexError, RuntimeError) as error:

1335

1910

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

1336

1911

return

1348

1923

approval_required = False

1349

1924

try:

1350

1925

try:

1351

fpr = self.fingerprint(self.peer_certificate

1352

(session))

1926

fpr = self.fingerprint(

1927

self.peer_certificate(session))

1353

1928

except (TypeError,

1354

1929

gnutls.errors.GNUTLSError) as error:

1355

1930

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

1370

1945

while True:

1371

1946

if not client.enabled:

1372

1947

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

1373

client.name)

1948

client.name)

1374

1949

if self.server.use_dbus:

1375

1950

# Emit D-Bus signal

1376

1951

client.Rejected("Disabled")

1377

1952

return

1378

1953

1379

if client._approved or not client.approval_delay:

1954

if client.approved or not client.approval_delay:

1380

1955

#We are approved or approval is disabled

1381

1956

break

1382

elif client._approved is None:

1957

elif client.approved is None:

1383

1958

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

1384

1959

client.name)

1385

1960

if self.server.use_dbus:

1386

1961

# Emit D-Bus signal

1387

1962

client.NeedApproval(

1388

client.approval_delay_milliseconds(),

1389

client.approved_by_default)

1963

client.approval_delay.total_seconds()

1964

* 1000, client.approved_by_default)

1390

1965

else:

1391

1966

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

1392

1967

client.name)

1398

1973

#wait until timeout or approved

1399

1974

time = datetime.datetime.now()

1400

1975

client.changedstate.acquire()

1401

(client.changedstate.wait

1402

(float(client._timedelta_to_milliseconds(delay)

1403

/ 1000)))

1976

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

1404

1977

client.changedstate.release()

1405

1978

time2 = datetime.datetime.now()

1406

1979

if (time2 - time) >= delay:

1422

1995

try:

1423

1996

sent = session.send(client.secret[sent_size:])

1424

1997

except gnutls.errors.GNUTLSError as error:

1425

logger.warning("gnutls send failed")

1998

logger.warning("gnutls send failed",

1999

exc_info=error)

1426

2000

return

1427

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

1428

sent, len(client.secret)

1429

- (sent_size + sent))

2001

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

2002

len(client.secret) - (sent_size

2003

+ sent))

1430

2004

sent_size += sent

1431

2005

1432

2006

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

1433

2007

# bump the timeout using extended_timeout

1434

client.checked_ok(client.extended_timeout)

2008

client.bump_timeout(client.extended_timeout)

1435

2009

if self.server.use_dbus:

1436

2010

# Emit D-Bus signal

1437

2011

client.GotSecret()

1442

2016

try:

1443

2017

session.bye()

1444

2018

except gnutls.errors.GNUTLSError as error:

1445

logger.warning("GnuTLS bye failed")

2019

logger.warning("GnuTLS bye failed",

2020

exc_info=error)

1446

2021

1447

2022

@staticmethod

1448

2023

def peer_certificate(session):

1449

2024

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

1450

2025

# If not an OpenPGP certificate...

1451

if (gnutls.library.functions

1452

.gnutls_certificate_type_get(session._c_object)

2026

if (gnutls.library.functions.gnutls_certificate_type_get(

2027

session._c_object)

1453

2028

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1454

2029

# ...do the normal thing

1455

2030

return session.peer_certificate

1469

2044

def fingerprint(openpgp):

1470

2045

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1471

2046

# New GnuTLS "datum" with the OpenPGP public key

1472

datum = (gnutls.library.types

1473

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

1474

ctypes.POINTER

1475

(ctypes.c_ubyte)),

1476

ctypes.c_uint(len(openpgp))))

2047

datum = gnutls.library.types.gnutls_datum_t(

2048

ctypes.cast(ctypes.c_char_p(openpgp),

2049

ctypes.POINTER(ctypes.c_ubyte)),

2050

ctypes.c_uint(len(openpgp)))

1477

2051

# New empty GnuTLS certificate

1478

2052

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1479

(gnutls.library.functions

1480

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2053

gnutls.library.functions.gnutls_openpgp_crt_init(

2054

ctypes.byref(crt))

1481

2055

# Import the OpenPGP public key into the certificate

1482

(gnutls.library.functions

1483

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

1484

gnutls.library.constants

1485

.GNUTLS_OPENPGP_FMT_RAW))

2056

gnutls.library.functions.gnutls_openpgp_crt_import(

2057

crt, ctypes.byref(datum),

2058

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1486

2059

# Verify the self signature in the key

1487

2060

crtverify = ctypes.c_uint()

1488

(gnutls.library.functions

1489

.gnutls_openpgp_crt_verify_self(crt, 0,

1490

ctypes.byref(crtverify)))

2061

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

2062

crt, 0, ctypes.byref(crtverify))

1491

2063

if crtverify.value != 0:

1492

2064

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1493

raise (gnutls.errors.CertificateSecurityError

1494

("Verify failed"))

2065

raise gnutls.errors.CertificateSecurityError(

2066

"Verify failed")

1495

2067

# New buffer for the fingerprint

1496

2068

buf = ctypes.create_string_buffer(20)

1497

2069

buf_len = ctypes.c_size_t()

1498

2070

# Get the fingerprint from the certificate into the buffer

1499

(gnutls.library.functions

1500

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

1501

ctypes.byref(buf_len)))

2071

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

2072

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

1502

2073

# Deinit the certificate

1503

2074

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1504

2075

# Convert the buffer to a Python bytestring

1505

2076

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

1506

2077

# Convert the bytestring to hexadecimal notation

1507

hex_fpr = ''.join("%02X" % ord(char) for char in fpr)

2078

hex_fpr = binascii.hexlify(fpr).upper()

1508

2079

return hex_fpr

1509

2080

1510

2081

1511

2082

class MultiprocessingMixIn(object):

1512

2083

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

2084

1513

2085

def sub_process_main(self, request, address):

1514

2086

try:

1515

2087

self.finish_request(request, address)

1516

except:

2088

except Exception:

1517

2089

self.handle_error(request, address)

1518

2090

self.close_request(request)

1519

2091

1520

2092

def process_request(self, request, address):

1521

2093

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

1522

2094

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

1523

args = (request,

1524

address))

2095

args = (request, address))

1525

2096

proc.start()

1526

2097

return proc

1527

2098

1528

2099

1529

2100

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1530

2101

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

2102

1531

2103

def process_request(self, request, client_address):

1532

2104

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

1533

2105

1542

2114

1543

2115

def add_pipe(self, parent_pipe, proc):

1544

2116

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

1545

raise NotImplementedError

2117

raise NotImplementedError()

1546

2118

1547

2119

1548

2120

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1554

2126

interface: None or a network interface name (string)

1555

2127

use_ipv6: Boolean; to use IPv6 or not

1556

2128

"""

2129

1557

2130

def __init__(self, server_address, RequestHandlerClass,

1558

interface=None, use_ipv6=True):

2131

interface=None,

2132

use_ipv6=True,

2133

socketfd=None):

2134

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

2135

creating a new one with socket.socket().

2136

"""

1559

2137

self.interface = interface

1560

2138

if use_ipv6:

1561

2139

self.address_family = socket.AF_INET6

2140

if socketfd is not None:

2141

# Save the file descriptor

2142

self.socketfd = socketfd

2143

# Save the original socket.socket() function

2144

self.socket_socket = socket.socket

2145

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

2146

#

2147

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

2148

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

2149

# patching socket.socket.)

2150

#

2151

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

2152

@functools.wraps(socket.socket)

2153

def socket_wrapper(*args, **kwargs):

2154

# Restore original function so subsequent calls are

2155

# not affected.

2156

socket.socket = self.socket_socket

2157

del self.socket_socket

2158

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

2159

# saved file descriptor.

2160

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

2161

# Replace socket.socket() function with wrapper

2162

socket.socket = socket_wrapper

2163

# The socketserver.TCPServer.__init__ will call

2164

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

2165

# socket_wrapper(), if socketfd was set.

1562

2166

socketserver.TCPServer.__init__(self, server_address,

1563

2167

RequestHandlerClass)

2168

1564

2169

def server_bind(self):

1565

2170

"""This overrides the normal server_bind() function

1566

2171

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

1572

2177

self.interface)

1573

2178

else:

1574

2179

try:

1575

self.socket.setsockopt(socket.SOL_SOCKET,

1576

SO_BINDTODEVICE,

1577

str(self.interface

1578

+ '\0'))

2180

self.socket.setsockopt(

2181

socket.SOL_SOCKET, SO_BINDTODEVICE,

2182

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

1579

2183

except socket.error as error:

1580

if error[0] == errno.EPERM:

1581

logger.error("No permission to"

1582

" bind to interface %s",

1583

self.interface)

1584

elif error[0] == errno.ENOPROTOOPT:

2184

if error.errno == errno.EPERM:

2185

logger.error("No permission to bind to"

2186

" interface %s", self.interface)

2187

elif error.errno == errno.ENOPROTOOPT:

1585

2188

logger.error("SO_BINDTODEVICE not available;"

1586

2189

" cannot bind to interface %s",

1587

2190

self.interface)

2191

elif error.errno == errno.ENODEV:

2192

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

2193

" cannot bind", self.interface)

1588

2194

else:

1589

2195

raise

1590

2196

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

1593

2199

if self.address_family == socket.AF_INET6:

1594

2200

any_address = "::" # in6addr_any

1595

2201

else:

1596

any_address = socket.INADDR_ANY

2202

any_address = "0.0.0.0" # INADDR_ANY

1597

2203

self.server_address = (any_address,

1598

2204

self.server_address[1])

1599

2205

elif not self.server_address[1]:

1600

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

1601

0)

2206

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

1602

2207

# if self.interface:

1603

2208

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

1604

2209

# 0, # port

1618

2223

1619

2224

Assumes a gobject.MainLoop event loop.

1620

2225

"""

2226

1621

2227

def __init__(self, server_address, RequestHandlerClass,

1622

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

1623

gnutls_priority=None, use_dbus=True):

2228

interface=None,

2229

use_ipv6=True,

2230

clients=None,

2231

gnutls_priority=None,

2232

use_dbus=True,

2233

socketfd=None):

1624

2234

self.enabled = False

1625

2235

self.clients = clients

1626

2236

if self.clients is None:

1627

self.clients = set()

2237

self.clients = {}

1628

2238

self.use_dbus = use_dbus

1629

2239

self.gnutls_priority = gnutls_priority

1630

2240

IPv6_TCPServer.__init__(self, server_address,

1631

2241

RequestHandlerClass,

1632

2242

interface = interface,

1633

use_ipv6 = use_ipv6)

2243

use_ipv6 = use_ipv6,

2244

socketfd = socketfd)

2245

1634

2246

def server_activate(self):

1635

2247

if self.enabled:

1636

2248

return socketserver.TCPServer.server_activate(self)

1640

2252

1641

2253

def add_pipe(self, parent_pipe, proc):

1642

2254

# Call "handle_ipc" for both data and EOF events

1643

gobject.io_add_watch(parent_pipe.fileno(),

1644

gobject.IO_IN | gobject.IO_HUP,

1645

functools.partial(self.handle_ipc,

1646

parent_pipe =

1647

parent_pipe,

1648

proc = proc))

2255

gobject.io_add_watch(

2256

parent_pipe.fileno(),

2257

gobject.IO_IN | gobject.IO_HUP,

2258

functools.partial(self.handle_ipc,

2259

parent_pipe = parent_pipe,

2260

proc = proc))

1649

2261

1650

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

1651

proc = None, client_object=None):

1652

condition_names = {

1653

gobject.IO_IN: "IN", # There is data to read.

1654

gobject.IO_OUT: "OUT", # Data can be written (without

1655

# blocking).

1656

gobject.IO_PRI: "PRI", # There is urgent data to read.

1657

gobject.IO_ERR: "ERR", # Error condition.

1658

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1659

# broken, usually for pipes and

1660

# sockets).

1661

}

1662

conditions_string = ' | '.join(name

1663

for cond, name in

1664

condition_names.iteritems()

1665

if cond & condition)

2262

def handle_ipc(self, source, condition,

2263

parent_pipe=None,

2264

proc = None,

2265

client_object=None):

1666

2266

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

1667

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

2267

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

1668

2268

# Wait for other process to exit

1669

2269

proc.join()

1670

2270

return False

1677

2277

fpr = request[1]

1678

2278

address = request[2]

1679

2279

1680

for c in self.clients:

2280

for c in self.clients.itervalues():

1681

2281

if c.fingerprint == fpr:

1682

2282

client = c

1683

2283

break

1691

2291

parent_pipe.send(False)

1692

2292

return False

1693

2293

1694

gobject.io_add_watch(parent_pipe.fileno(),

1695

gobject.IO_IN | gobject.IO_HUP,

1696

functools.partial(self.handle_ipc,

1697

parent_pipe =

1698

parent_pipe,

1699

proc = proc,

1700

client_object =

1701

client))

2294

gobject.io_add_watch(

2295

parent_pipe.fileno(),

2296

gobject.IO_IN | gobject.IO_HUP,

2297

functools.partial(self.handle_ipc,

2298

parent_pipe = parent_pipe,

2299

proc = proc,

2300

client_object = client))

1702

2301

parent_pipe.send(True)

1703

2302

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

1704

2303

# same fileno

1710

2309

1711

2310

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

1712

2311

funcname)(*args,

1713

**kwargs)))

2312

**kwargs)))

1714

2313

1715

2314

if command == 'getattr':

1716

2315

attrname = request[1]

1717

if callable(client_object.__getattribute__(attrname)):

1718

parent_pipe.send(('function',))

2316

if isinstance(client_object.__getattribute__(attrname),

2317

collections.Callable):

2318

parent_pipe.send(('function', ))

1719

2319

else:

1720

parent_pipe.send(('data', client_object

1721

.__getattribute__(attrname)))

2320

parent_pipe.send((

2321

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

1722

2322

1723

2323

if command == 'setattr':

1724

2324

attrname = request[1]

1728

2328

return True

1729

2329

1730

2330

2331

def rfc3339_duration_to_delta(duration):

2332

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

2333

2334

>>> rfc3339_duration_to_delta("P7D")

2335

datetime.timedelta(7)

2336

>>> rfc3339_duration_to_delta("PT60S")

2337

datetime.timedelta(0, 60)

2338

>>> rfc3339_duration_to_delta("PT60M")

2339

datetime.timedelta(0, 3600)

2340

>>> rfc3339_duration_to_delta("PT24H")

2341

datetime.timedelta(1)

2342

>>> rfc3339_duration_to_delta("P1W")

2343

datetime.timedelta(7)

2344

>>> rfc3339_duration_to_delta("PT5M30S")

2345

datetime.timedelta(0, 330)

2346

>>> rfc3339_duration_to_delta("P1DT3M20S")

2347

datetime.timedelta(1, 200)

2348

"""

2349

2350

# Parsing an RFC 3339 duration with regular expressions is not

2351

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

2352

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

2353

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

2354

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

2355

# avoid excessive use of external libraries.

2356

2357

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

2358

Token = collections.namedtuple("Token", (

2359

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

2360

# a "group" containing digits

2361

"value", # datetime.timedelta or None

2362

"followers")) # Tokens valid after this token

2363

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

2364

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

2365

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

2366

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

2367

datetime.timedelta(seconds=1),

2368

frozenset((token_end, )))

2369

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

2370

datetime.timedelta(minutes=1),

2371

frozenset((token_second, token_end)))

2372

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

2373

datetime.timedelta(hours=1),

2374

frozenset((token_minute, token_end)))

2375

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

2376

None,

2377

frozenset((token_hour, token_minute,

2378

token_second)))

2379

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

2380

datetime.timedelta(days=1),

2381

frozenset((token_time, token_end)))

2382

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

2383

datetime.timedelta(weeks=4),

2384

frozenset((token_day, token_end)))

2385

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

2386

datetime.timedelta(weeks=52),

2387

frozenset((token_month, token_end)))

2388

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

2389

datetime.timedelta(weeks=1),

2390

frozenset((token_end, )))

2391

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

2392

frozenset((token_year, token_month,

2393

token_day, token_time,

2394

token_week)))

2395

# Define starting values

2396

value = datetime.timedelta() # Value so far

2397

found_token = None

2398

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

2399

s = duration # String left to parse

2400

# Loop until end token is found

2401

while found_token is not token_end:

2402

# Search for any currently valid tokens

2403

for token in followers:

2404

match = token.regexp.match(s)

2405

if match is not None:

2406

# Token found

2407

if token.value is not None:

2408

# Value found, parse digits

2409

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

2410

# Add to value so far

2411

value += factor * token.value

2412

# Strip token from string

2413

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

2414

# Go to found token

2415

found_token = token

2416

# Set valid next tokens

2417

followers = found_token.followers

2418

break

2419

else:

2420

# No currently valid tokens were found

2421

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

2422

.format(duration))

2423

# End token found

2424

return value

2425

2426

1731

2427

def string_to_delta(interval):

1732

2428

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

1733

2429

1744

2440

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

1745

2441

datetime.timedelta(0, 330)

1746

2442

"""

2443

2444

try:

2445

return rfc3339_duration_to_delta(interval)

2446

except ValueError:

2447

pass

2448

1747

2449

timevalue = datetime.timedelta(0)

1748

2450

for s in interval.split():

1749

2451

try:

1750

suffix = unicode(s[-1])

2452

suffix = s[-1]

1751

2453

value = int(s[:-1])

1752

2454

if suffix == "d":

1753

2455

delta = datetime.timedelta(value)

1760

2462

elif suffix == "w":

1761

2463

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

1762

2464

else:

1763

raise ValueError("Unknown suffix %r" % suffix)

1764

except (ValueError, IndexError) as e:

2465

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

2466

except IndexError as e:

1765

2467

raise ValueError(*(e.args))

1766

2468

timevalue += delta

1767

2469

return timevalue

1768

2470

1769

2471

1770

def if_nametoindex(interface):

1771

"""Call the C function if_nametoindex(), or equivalent

1772

1773

Note: This function cannot accept a unicode string."""

1774

global if_nametoindex

1775

try:

1776

if_nametoindex = (ctypes.cdll.LoadLibrary

1777

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

1778

.if_nametoindex)

1779

except (OSError, AttributeError):

1780

logger.warning("Doing if_nametoindex the hard way")

1781

def if_nametoindex(interface):

1782

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

1783

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

1784

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

1785

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1786

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

1787

interface))

1788

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

1789

ifreq[16:20])[0]

1790

return interface_index

1791

return if_nametoindex(interface)

1792

1793

1794

2472

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

1795

2473

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

1796

2474

1804

2482

sys.exit()

1805

2483

if not noclose:

1806

2484

# Close all standard open file descriptors

1807

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

2485

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

1808

2486

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

1809

2487

raise OSError(errno.ENODEV,

1810

"%s not a character device"

1811

% os.path.devnull)

2488

"{} not a character device"

2489

.format(os.devnull))

1812

2490

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

1813

2491

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

1814

2492

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

1823

2501

1824

2502

parser = argparse.ArgumentParser()

1825

2503

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

1826

version = "%%(prog)s %s" % version,

2504

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

1827

2505

help="show version number and exit")

1828

2506

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

1829

2507

help="Bind to interface IF")

1835

2513

help="Run self-test")

1836

2514

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

1837

2515

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

1838

" to terminal")

2516

" to terminal", default=None)

1839

2517

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

1840

2518

help="Debug level for stdout output")

1841

2519

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

1848

2526

" files")

1849

2527

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

1850

2528

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

1851

" system bus interface")

2529

" system bus interface", default=None)

1852

2530

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

1853

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

2531

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

2532

default=None)

2533

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

2534

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

2535

" state", default=None)

2536

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

2537

help="Specify a file descriptor to a network"

2538

" socket to use instead of creating one")

2539

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

2540

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

2541

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

2542

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

2543

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

2544

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

2545

default=None)

2546

1854

2547

options = parser.parse_args()

1855

2548

1856

2549

if options.check:

1857

2550

import doctest

1858

doctest.testmod()

1859

sys.exit()

2551

fail_count, test_count = doctest.testmod()

2552

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

1860

2553

1861

2554

# Default values for config file for server-global settings

1862

2555

server_defaults = { "interface": "",

1864

2557

"port": "",

1865

2558

"debug": "False",

1866

2559

"priority":

1867

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

2560

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

2561

":+SIGN-DSA-SHA256",

1868

2562

"servicename": "Mandos",

1869

2563

"use_dbus": "True",

1870

2564

"use_ipv6": "True",

1871

2565

"debuglevel": "",

1872

}

2566

"restore": "True",

2567

"socket": "",

2568

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

2569

"foreground": "False",

2570

"zeroconf": "True",

2571

}

1873

2572

1874

2573

# Parse config file for server-global settings

1875

2574

server_config = configparser.SafeConfigParser(server_defaults)

1876

2575

del server_defaults

1877

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

1878

"mandos.conf"))

2576

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

1879

2577

# Convert the SafeConfigParser object to a dict

1880

2578

server_settings = server_config.defaults()

1881

2579

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

1882

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

2580

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

1883

2581

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

1884

2582

option)

1885

2583

if server_settings["port"]:

1886

2584

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

1887

2585

"port")

2586

if server_settings["socket"]:

2587

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

2588

"socket")

2589

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

2590

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

2591

# happen with a supplied network socket.

2592

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

2593

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

2594

["socket"])

1888

2595

del server_config

1889

2596

1890

2597

# Override the settings from the config file with command line

1891

2598

# options, if set.

1892

2599

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

1893

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

1894

"use_dbus", "use_ipv6", "debuglevel"):

2600

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

2601

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

2602

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

1895

2603

value = getattr(options, option)

1896

2604

if value is not None:

1897

2605

server_settings[option] = value

1898

2606

del options

1899

2607

# Force all strings to be unicode

1900

2608

for option in server_settings.keys():

1901

if type(server_settings[option]) is str:

1902

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

2609

if isinstance(server_settings[option], bytes):

2610

server_settings[option] = (server_settings[option]

2611

.decode("utf-8"))

2612

# Force all boolean options to be boolean

2613

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

2614

"foreground", "zeroconf"):

2615

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

2616

# Debug implies foreground

2617

if server_settings["debug"]:

2618

server_settings["foreground"] = True

1903

2619

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

1904

2620

1905

2621

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

1906

2622

2623

if (not server_settings["zeroconf"]

2624

and not (server_settings["port"]

2625

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

2626

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

2627

1907

2628

# For convenience

1908

2629

debug = server_settings["debug"]

1909

2630

debuglevel = server_settings["debuglevel"]

1910

2631

use_dbus = server_settings["use_dbus"]

1911

2632

use_ipv6 = server_settings["use_ipv6"]

2633

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

2634

stored_state_file)

2635

foreground = server_settings["foreground"]

2636

zeroconf = server_settings["zeroconf"]

2637

2638

if debug:

2639

initlogger(debug, logging.DEBUG)

2640

else:

2641

if not debuglevel:

2642

initlogger(debug)

2643

else:

2644

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

2645

initlogger(debug, level)

1912

2646

1913

2647

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

1914

syslogger.setFormatter(logging.Formatter

1915

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

1916

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

1917

% server_settings["servicename"]))

2648

syslogger.setFormatter(

2649

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

2650

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

2651

server_settings["servicename"])))

1918

2652

1919

2653

# Parse config file with clients

1920

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

1921

"extended_timeout": "15m",

1922

"interval": "2m",

1923

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

1924

"host": "",

1925

"approval_delay": "0s",

1926

"approval_duration": "1s",

1927

}

1928

client_config = configparser.SafeConfigParser(client_defaults)

2654

client_config = configparser.SafeConfigParser(Client

2655

.client_defaults)

1929

2656

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

1930

2657

"clients.conf"))

1931

2658

1932

2659

global mandos_dbus_service

1933

2660

mandos_dbus_service = None

1934

2661

1935

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

1936

server_settings["port"]),

1937

ClientHandler,

1938

interface=(server_settings["interface"]

1939

or None),

1940

use_ipv6=use_ipv6,

1941

gnutls_priority=

1942

server_settings["priority"],

1943

use_dbus=use_dbus)

1944

if not debug:

1945

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

2662

socketfd = None

2663

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

2664

socketfd = server_settings["socket"]

2665

tcp_server = MandosServer(

2666

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

2667

ClientHandler,

2668

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

2669

use_ipv6=use_ipv6,

2670

gnutls_priority=server_settings["priority"],

2671

use_dbus=use_dbus,

2672

socketfd=socketfd)

2673

if not foreground:

2674

pidfilename = "/run/mandos.pid"

2675

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

2676

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

2677

pidfile = None

1946

2678

try:

1947

pidfile = open(pidfilename, "w")

1948

except IOError:

1949

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

2679

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

2680

except IOError as e:

2681

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

2682

exc_info=e)

1950

2683

1951

try:

1952

uid = pwd.getpwnam("_mandos").pw_uid

1953

gid = pwd.getpwnam("_mandos").pw_gid

1954

except KeyError:

2684

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

1955

2685

try:

1956

uid = pwd.getpwnam("mandos").pw_uid

1957

gid = pwd.getpwnam("mandos").pw_gid

2686

uid = pwd.getpwnam(name).pw_uid

2687

gid = pwd.getpwnam(name).pw_gid

2688

break

1958

2689

except KeyError:

1959

try:

1960

uid = pwd.getpwnam("nobody").pw_uid

1961

gid = pwd.getpwnam("nobody").pw_gid

1962

except KeyError:

1963

uid = 65534

1964

gid = 65534

2690

continue

2691

else:

2692

uid = 65534

2693

gid = 65534

1965

2694

try:

1966

2695

os.setgid(gid)

1967

2696

os.setuid(uid)

1968

2697

except OSError as error:

1969

if error[0] != errno.EPERM:

1970

raise error

1971

1972

if not debug and not debuglevel:

1973

syslogger.setLevel(logging.WARNING)

1974

console.setLevel(logging.WARNING)

1975

if debuglevel:

1976

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

1977

syslogger.setLevel(level)

1978

console.setLevel(level)

2698

if error.errno != errno.EPERM:

2699

raise

1979

2700

1980

2701

if debug:

1981

2702

# Enable all possible GnuTLS debugging

1988

2709

def debug_gnutls(level, string):

1989

2710

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

1990

2711

1991

(gnutls.library.functions

1992

.gnutls_global_set_log_function(debug_gnutls))

2712

gnutls.library.functions.gnutls_global_set_log_function(

2713

debug_gnutls)

1993

2714

1994

2715

# Redirect stdin so all checkers get /dev/null

1995

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

2716

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

1996

2717

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

1997

2718

if null > 2:

1998

2719

os.close(null)

1999

else:

2000

# No console logging

2001

logger.removeHandler(console)

2002

2720

2003

2721

# Need to fork before connecting to D-Bus

2004

if not debug:

2722

if not foreground:

2005

2723

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

2006

2724

daemon()

2007

2725

2726

# multiprocessing will use threads, so before we use gobject we

2727

# need to inform gobject that threads will be used.

2728

gobject.threads_init()

2729

2008

2730

global main_loop

2009

2731

# From the Avahi example code

2010

DBusGMainLoop(set_as_default=True )

2732

DBusGMainLoop(set_as_default=True)

2011

2733

main_loop = gobject.MainLoop()

2012

2734

bus = dbus.SystemBus()

2013

2735

# End of Avahi example code

2014

2736

if use_dbus:

2015

2737

try:

2016

2738

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

2017

bus, do_not_queue=True)

2018

old_bus_name = (dbus.service.BusName

2019

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

2020

do_not_queue=True))

2021

except dbus.exceptions.NameExistsException as e:

2022

logger.error(unicode(e) + ", disabling D-Bus")

2739

bus,

2740

do_not_queue=True)

2741

old_bus_name = dbus.service.BusName(

2742

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

2743

do_not_queue=True)

2744

except dbus.exceptions.DBusException as e:

2745

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

2023

2746

use_dbus = False

2024

2747

server_settings["use_dbus"] = False

2025

2748

tcp_server.use_dbus = False

2026

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2027

service = AvahiService(name = server_settings["servicename"],

2028

servicetype = "_mandos._tcp",

2029

protocol = protocol, bus = bus)

2030

if server_settings["interface"]:

2031

service.interface = (if_nametoindex

2032

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

2749

if zeroconf:

2750

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2751

service = AvahiServiceToSyslog(

2752

name = server_settings["servicename"],

2753

servicetype = "_mandos._tcp",

2754

protocol = protocol,

2755

bus = bus)

2756

if server_settings["interface"]:

2757

service.interface = if_nametoindex(

2758

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

2033

2759

2034

2760

global multiprocessing_manager

2035

2761

multiprocessing_manager = multiprocessing.Manager()

2036

2762

2037

2763

client_class = Client

2038

2764

if use_dbus:

2039

client_class = functools.partial(ClientDBusTransitional,

2040

bus = bus)

2041

def client_config_items(config, section):

2042

special_settings = {

2043

"approved_by_default":

2044

lambda: config.getboolean(section,

2045

"approved_by_default"),

2046

}

2047

for name, value in config.items(section):

2765

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

2766

2767

client_settings = Client.config_parser(client_config)

2768

old_client_settings = {}

2769

clients_data = {}

2770

2771

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

2772

global wnull

2773

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

2774

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

2775

# mode

2776

if debug or not foreground:

2777

wnull.close()

2778

2779

# Get client data and settings from last running state.

2780

if server_settings["restore"]:

2781

try:

2782

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

2783

clients_data, old_client_settings = pickle.load(

2784

stored_state)

2785

os.remove(stored_state_path)

2786

except IOError as e:

2787

if e.errno == errno.ENOENT:

2788

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

2789

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

2790

else:

2791

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

2792

exc_info=e)

2793

raise

2794

except EOFError as e:

2795

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

2796

"EOFError:",

2797

exc_info=e)

2798

2799

with PGPEngine() as pgp:

2800

for client_name, client in clients_data.items():

2801

# Skip removed clients

2802

if client_name not in client_settings:

2803

continue

2804

2805

# Decide which value to use after restoring saved state.

2806

# We have three different values: Old config file,

2807

# new config file, and saved state.

2808

# New config value takes precedence if it differs from old

2809

# config value, otherwise use saved state.

2810

for name, value in client_settings[client_name].items():

2811

try:

2812

# For each value in new config, check if it

2813

# differs from the old config value (Except for

2814

# the "secret" attribute)

2815

if (name != "secret"

2816

and (value !=

2817

old_client_settings[client_name][name])):

2818

client[name] = value

2819

except KeyError:

2820

pass

2821

2822

# Clients who has passed its expire date can still be

2823

# enabled if its last checker was successful. A Client

2824

# whose checker succeeded before we stored its state is

2825

# assumed to have successfully run all checkers during

2826

# downtime.

2827

if client["enabled"]:

2828

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

2829

if not client["last_checked_ok"]:

2830

logger.warning(

2831

"disabling client {} - Client never "

2832

"performed a successful checker".format(

2833

client_name))

2834

client["enabled"] = False

2835

elif client["last_checker_status"] != 0:

2836

logger.warning(

2837

"disabling client {} - Client last"

2838

" checker failed with error code"

2839

" {}".format(

2840

client_name,

2841

client["last_checker_status"]))

2842

client["enabled"] = False

2843

else:

2844

client["expires"] = (

2845

datetime.datetime.utcnow()

2846

+ client["timeout"])

2847

logger.debug("Last checker succeeded,"

2848

" keeping {} enabled".format(

2849

client_name))

2048

2850

try:

2049

yield (name, special_settings[name]())

2050

except KeyError:

2051

yield (name, value)

2052

2053

tcp_server.clients.update(set(

2054

client_class(name = section,

2055

config= dict(client_config_items(

2056

client_config, section)))

2057

for section in client_config.sections()))

2851

client["secret"] = pgp.decrypt(

2852

client["encrypted_secret"],

2853

client_settings[client_name]["secret"])

2854

except PGPError:

2855

# If decryption fails, we use secret from new settings

2856

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

2857

client_name))

2858

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

2859

["secret"])

2860

2861

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

2862

for client_name in (set(old_client_settings)

2863

- set(client_settings)):

2864

del clients_data[client_name]

2865

for client_name in (set(client_settings)

2866

- set(old_client_settings)):

2867

clients_data[client_name] = client_settings[client_name]

2868

2869

# Create all client objects

2870

for client_name, client in clients_data.items():

2871

tcp_server.clients[client_name] = client_class(

2872

name = client_name,

2873

settings = client,

2874

server_settings = server_settings)

2875

2058

2876

if not tcp_server.clients:

2059

2877

logger.warning("No clients defined")

2060

2061

if not debug:

2062

try:

2063

with pidfile:

2064

pid = os.getpid()

2065

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

2066

del pidfile

2067

except IOError:

2068

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

2069

pidfilename, pid)

2070

except NameError:

2071

# "pidfile" was never created

2072

pass

2878

2879

if not foreground:

2880

if pidfile is not None:

2881

pid = os.getpid()

2882

try:

2883

with pidfile:

2884

print(pid, file=pidfile)

2885

except IOError:

2886

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

2887

pidfilename, pid)

2888

del pidfile

2073

2889

del pidfilename

2074

2075

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

2076

2890

2077

2891

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

2078

2892

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

2079

2893

2080

2894

if use_dbus:

2081

class MandosDBusService(dbus.service.Object):

2895

2896

@alternate_dbus_interfaces(

2897

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

2898

class MandosDBusService(DBusObjectWithObjectManager):

2082

2899

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

2900

2083

2901

def __init__(self):

2084

2902

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

2903

2085

2904

_interface = "se.recompile.Mandos"

2086

2905

2087

2906

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

2094

2913

"D-Bus signal"

2095

2914

pass

2096

2915

2916

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

2917

"true"})

2097

2918

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

2098

2919

def ClientRemoved(self, objpath, name):

2099

2920

"D-Bus signal"

2100

2921

pass

2101

2922

2923

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

2924

"true"})

2102

2925

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

2103

2926

def GetAllClients(self):

2104

2927

"D-Bus method"

2105

return dbus.Array(c.dbus_object_path

2106

for c in tcp_server.clients)

2928

return dbus.Array(c.dbus_object_path for c in

2929

tcp_server.clients.itervalues())

2107

2930

2931

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

2932

"true"})

2108

2933

@dbus.service.method(_interface,

2109

2934

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

2110

2935

def GetAllClientsWithProperties(self):

2111

2936

"D-Bus method"

2112

2937

return dbus.Dictionary(

2113

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

2114

for c in tcp_server.clients),

2938

{ c.dbus_object_path: c.GetAll(

2939

"se.recompile.Mandos.Client")

2940

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

2115

2941

signature="oa{sv}")

2116

2942

2117

2943

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

2118

2944

def RemoveClient(self, object_path):

2119

2945

"D-Bus method"

2120

for c in tcp_server.clients:

2946

for c in tcp_server.clients.itervalues():

2121

2947

if c.dbus_object_path == object_path:

2122

tcp_server.clients.remove(c)

2948

del tcp_server.clients[c.name]

2123

2949

c.remove_from_connection()

2124

# Don't signal anything except ClientRemoved

2950

# Don't signal the disabling

2125

2951

c.disable(quiet=True)

2126

# Emit D-Bus signal

2127

self.ClientRemoved(object_path, c.name)

2952

# Emit D-Bus signal for removal

2953

self.client_removed_signal(c)

2128

2954

return

2129

2955

raise KeyError(object_path)

2130

2956

2131

2957

del _interface

2958

2959

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

2960

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

2961

def GetManagedObjects(self):

2962

"""D-Bus method"""

2963

return dbus.Dictionary(

2964

{ client.dbus_object_path:

2965

dbus.Dictionary(

2966

{ interface: client.GetAll(interface)

2967

for interface in

2968

client._get_all_interface_names()})

2969

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

2970

2971

def client_added_signal(self, client):

2972

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

2973

if use_dbus:

2974

# New standard signal

2975

self.InterfacesAdded(

2976

client.dbus_object_path,

2977

dbus.Dictionary(

2978

{ interface: client.GetAll(interface)

2979

for interface in

2980

client._get_all_interface_names()}))

2981

# Old signal

2982

self.ClientAdded(client.dbus_object_path)

2983

2984

def client_removed_signal(self, client):

2985

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

2986

if use_dbus:

2987

# New standard signal

2988

self.InterfacesRemoved(

2989

client.dbus_object_path,

2990

client._get_all_interface_names())

2991

# Old signal

2992

self.ClientRemoved(client.dbus_object_path,

2993

client.name)

2132

2994

2133

class MandosDBusServiceTransitional(MandosDBusService):

2134

__metaclass__ = AlternateDBusNamesMetaclass

2135

mandos_dbus_service = MandosDBusServiceTransitional()

2995

mandos_dbus_service = MandosDBusService()

2136

2996

2137

2997

def cleanup():

2138

2998

"Cleanup function; run on exit"

2139

service.cleanup()

2999

if zeroconf:

3000

service.cleanup()

2140

3001

2141

3002

multiprocessing.active_children()

3003

wnull.close()

3004

if not (tcp_server.clients or client_settings):

3005

return

3006

3007

# Store client before exiting. Secrets are encrypted with key

3008

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

3009

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

3010

clients = {}

3011

with PGPEngine() as pgp:

3012

for client in tcp_server.clients.itervalues():

3013

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

3014

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

3015

key)

3016

client_dict = {}

3017

3018

# A list of attributes that can not be pickled

3019

# + secret.

3020

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

3021

"checker", "server_settings" }

3022

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

3023

.Object):

3024

exclude.add(name)

3025

3026

client_dict["encrypted_secret"] = (client

3027

.encrypted_secret)

3028

for attr in client.client_structure:

3029

if attr not in exclude:

3030

client_dict[attr] = getattr(client, attr)

3031

3032

clients[client.name] = client_dict

3033

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

3034

3035

try:

3036

with tempfile.NamedTemporaryFile(

3037

mode='wb',

3038

suffix=".pickle",

3039

prefix='clients-',

3040

dir=os.path.dirname(stored_state_path),

3041

delete=False) as stored_state:

3042

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

3043

tempname = stored_state.name

3044

os.rename(tempname, stored_state_path)

3045

except (IOError, OSError) as e:

3046

if not debug:

3047

try:

3048

os.remove(tempname)

3049

except NameError:

3050

pass

3051

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

3052

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

3053

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

3054

else:

3055

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

3056

exc_info=e)

3057

raise

3058

3059

# Delete all clients, and settings from config

2142

3060

while tcp_server.clients:

2143

client = tcp_server.clients.pop()

3061

name, client = tcp_server.clients.popitem()

2144

3062

if use_dbus:

2145

3063

client.remove_from_connection()

2146

client.disable_hook = None

2147

# Don't signal anything except ClientRemoved

3064

# Don't signal the disabling

2148

3065

client.disable(quiet=True)

2149

if use_dbus:

2150

# Emit D-Bus signal

2151

mandos_dbus_service.ClientRemoved(client

2152

.dbus_object_path,

2153

client.name)

3066

# Emit D-Bus signal for removal

3067

mandos_dbus_service.client_removed_signal(client)

3068

client_settings.clear()

2154

3069

2155

3070

atexit.register(cleanup)

2156

3071

2157

for client in tcp_server.clients:

3072

for client in tcp_server.clients.itervalues():

2158

3073

if use_dbus:

2159

# Emit D-Bus signal

2160

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2161

client.enable()

3074

# Emit D-Bus signal for adding

3075

mandos_dbus_service.client_added_signal(client)

3076

# Need to initiate checking of clients

3077

if client.enabled:

3078

client.init_checker()

2162

3079

2163

3080

tcp_server.enable()

2164

3081

tcp_server.server_activate()

2165

3082

2166

3083

# Find out what port we got

2167

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

3084

if zeroconf:

3085

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

2168

3086

if use_ipv6:

2169

3087

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

2170

" flowinfo %d, scope_id %d"

2171

% tcp_server.socket.getsockname())

3088

" flowinfo %d, scope_id %d",

3089

*tcp_server.socket.getsockname())

2172

3090

else: # IPv4

2173

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

2174

% tcp_server.socket.getsockname())

3091

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

3092

*tcp_server.socket.getsockname())

2175

3093

2176

3094

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

2177

3095

2178

3096

try:

2179

# From the Avahi example code

2180

try:

2181

service.activate()

2182

except dbus.exceptions.DBusException as error:

2183

logger.critical("DBusException: %s", error)

2184

cleanup()

2185

sys.exit(1)

2186

# End of Avahi example code

3097

if zeroconf:

3098

# From the Avahi example code

3099

try:

3100

service.activate()

3101

except dbus.exceptions.DBusException as error:

3102

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

3103

cleanup()

3104

sys.exit(1)

3105

# End of Avahi example code

2187

3106

2188

3107

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

2189

3108

lambda *args, **kwargs:

2193

3112

logger.debug("Starting main loop")

2194

3113

main_loop.run()

2195

3114

except AvahiError as error:

2196

logger.critical("AvahiError: %s", error)

3115

logger.critical("Avahi Error", exc_info=error)

2197

3116

cleanup()

2198

3117

sys.exit(1)

2199

3118

except KeyboardInterrupt: