/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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# along with this program. If not, see

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# <http://www.gnu.org/licenses/>.

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#

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# Contact the authors at <mandos@fukt.bsnet.se>.

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# Contact the authors at <mandos@recompile.se>.

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#

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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 = "1.3.1"

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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.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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375

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()

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397

elif state == avahi.SERVER_RUNNING:

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self.add()

398

try:

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self.add()

400

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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if error is None:

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

253

413

else:

254

414

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

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255

416

def activate(self):

256

417

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

257

418

if self.server is None:

261

422

follow_name_owner_changes=True),

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423

avahi.DBUS_INTERFACE_SERVER)

263

424

self.server.connect_to_signal("StateChanged",

264

self.server_state_changed)

425

self.server_state_changed)

265

426

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

266

427

267

428

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def _timedelta_to_milliseconds(td):

269

"Convert a datetime.timedelta() to milliseconds"

270

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

271

+ (td.seconds * 1000)

272

+ (td.microseconds // 1000))

273

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

274

448

class Client(object):

275

449

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

276

450

277

451

Attributes:

278

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

452

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

279

453

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

280

454

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

281

455

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

288

462

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

289

463

checker_initiator_tag: a gobject event source tag, or None

290

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

291

467

current_checker_command: string; current running checker_command

292

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

293

468

disable_initiator_tag: a gobject event source tag, or None

294

469

enabled: bool()

295

470

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

298

473

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

299

474

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

300

475

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

301

last_enabled: datetime.datetime(); (UTC)

476

last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

302

482

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

303

483

D-Bus identifiers

304

484

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

305

485

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

306

486

until this client is disabled

307

extended_timeout: extra long timeout when password has been sent

487

extended_timeout: extra long timeout when secret has been sent

308

488

runtime_expansions: Allowed attributes for runtime expansion.

309

489

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

310

490

disabled, or None

491

server_settings: The server_settings dict from main()

311

492

"""

312

493

313

494

runtime_expansions = ("approval_delay", "approval_duration",

314

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

315

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

495

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

496

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

497

"last_approval_request", "last_checked_ok",

316

498

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

317

318

def timeout_milliseconds(self):

319

"Return the 'timeout' attribute in milliseconds"

320

return _timedelta_to_milliseconds(self.timeout)

321

322

def extended_timeout_milliseconds(self):

323

"Return the 'extended_timeout' attribute in milliseconds"

324

return _timedelta_to_milliseconds(self.extended_timeout)

325

326

def interval_milliseconds(self):

327

"Return the 'interval' attribute in milliseconds"

328

return _timedelta_to_milliseconds(self.interval)

329

330

def approval_delay_milliseconds(self):

331

return _timedelta_to_milliseconds(self.approval_delay)

332

333

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

334

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

335

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

336

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):

337

562

self.name = name

338

if config is None:

339

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

340

580

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

341

# Uppercase and remove spaces from fingerprint for later

342

# comparison purposes with return value from the fingerprint()

343

# function

344

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

345

.replace(" ", ""))

346

581

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

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

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

356

% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

582

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

583

datetime.datetime.utcnow())

584

585

# attributes specific for this server instance

367

586

self.checker = None

368

587

self.checker_initiator_tag = None

369

588

self.disable_initiator_tag = None

370

self.expires = None

371

589

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

373

590

self.current_checker_command = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

591

self.approved = None

378

592

self.approvals_pending = 0

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.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)

384

604

605

# Send notice to process children that client state has changed

385

606

def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

607

with self.changedstate:

608

self.changedstate.notify_all()

609

390

610

def enable(self):

391

611

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

392

612

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

393

613

# Already enabled

394

614

return

395

self.send_changedstate()

396

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

397

# and every interval from then on.

398

self.checker_initiator_tag = (gobject.timeout_add

399

(self.interval_milliseconds(),

400

self.start_checker))

401

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

402

615

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

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

406

616

self.enabled = True

407

617

self.last_enabled = datetime.datetime.utcnow()

408

# Also start a new checker *right now*.

409

self.start_checker()

618

self.init_checker()

619

self.send_changedstate()

410

620

411

621

def disable(self, quiet=True):

412

622

"""Disable this client."""

413

623

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

414

624

return False

415

625

if not quiet:

416

self.send_changedstate()

417

if not quiet:

418

626

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

419

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

627

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

420

628

gobject.source_remove(self.disable_initiator_tag)

421

629

self.disable_initiator_tag = None

422

630

self.expires = None

423

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

631

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

424

632

gobject.source_remove(self.checker_initiator_tag)

425

633

self.checker_initiator_tag = None

426

634

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

635

self.enabled = False

636

if not quiet:

637

self.send_changedstate()

430

638

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

431

639

return False

432

640

433

641

def __del__(self):

434

self.disable_hook = None

435

642

self.disable()

436

643

437

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):

438

662

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

439

663

self.checker_callback_tag = None

440

664

self.checker = None

441

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

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:

444

673

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

445

674

vars(self))

446

675

self.checked_ok()

447

676

else:

448

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

449

vars(self))

677

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

450

678

else:

679

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

451

681

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

452

682

vars(self))

453

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

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."""

460

694

if timeout is None:

461

695

timeout = self.timeout

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(_timedelta_to_milliseconds(timeout),

467

self.disable))

696

if self.disable_initiator_tag is not None:

697

gobject.source_remove(self.disable_initiator_tag)

698

self.disable_initiator_tag = None

699

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

700

self.disable_initiator_tag = gobject.timeout_add(

701

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

702

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

468

703

469

704

def need_approval(self):

470

705

self.last_approval_request = datetime.datetime.utcnow()

475

710

If a checker already exists, leave it running and do

476

711

nothing."""

477

712

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

478

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

479

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

480

# client would inevitably timeout, since no checker would get

481

# 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

482

717

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

483

718

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

484

719

# should be.

485

720

486

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

487

try:

488

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

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

493

else:

494

if pid:

495

logger.warning("Checker was a zombie")

496

gobject.source_remove(self.checker_callback_tag)

497

self.checker_callback(pid, status,

498

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

499

725

# Start a new checker if needed

500

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 }

501

731

try:

502

# In case checker_command has exactly one % operator

503

command = self.checker_command % self.host

504

except TypeError:

505

# Escape attributes for the shell

506

escaped_attrs = dict(

507

(attr,

508

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

509

errors=

510

'replace')))

511

for attr in

512

self.runtime_expansions)

513

514

try:

515

command = self.checker_command % escaped_attrs

516

except TypeError as error:

517

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

518

' %s', self.checker_command, error)

519

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

520

738

self.current_checker_command = command

521

try:

522

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

523

command, self.name)

524

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

525

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

526

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

527

# always replaced by /dev/null.)

528

self.checker = subprocess.Popen(command,

529

close_fds=True,

530

shell=True, cwd="/")

531

self.checker_callback_tag = (gobject.child_watch_add

532

(self.checker.pid,

533

self.checker_callback,

534

data=command))

535

# The checker may have completed before the gobject

536

# watch was added. Check for this.

537

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

538

if pid:

539

gobject.source_remove(self.checker_callback_tag)

540

self.checker_callback(pid, status, command)

541

except OSError as error:

542

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

543

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)

544

764

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

545

765

return True

546

766

552

772

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

553

773

return

554

774

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

555

try:

556

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

557

#time.sleep(0.5)

558

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

559

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

560

except OSError as error:

561

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

562

raise

775

self.checker.terminate()

563

776

self.checker = None

564

777

565

778

566

def dbus_service_property(dbus_interface, signature="v",

567

access="readwrite", byte_arrays=False):

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

568

783

"""Decorators for marking methods of a DBusObjectWithProperties to

569

784

become properties on the D-Bus.

570

785

579

794

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

580

795

if byte_arrays and signature != "ay":

581

796

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

582

" signature %r" % signature)

797

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

798

583

799

def decorator(func):

584

800

func._dbus_is_property = True

585

801

func._dbus_interface = dbus_interface

590

806

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

591

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

592

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

593

853

return decorator

594

854

595

855

596

856

class DBusPropertyException(dbus.exceptions.DBusException):

597

857

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

598

858

"""

599

def __unicode__(self):

600

return unicode(str(self))

859

pass

601

860

602

861

603

862

class DBusPropertyAccessException(DBusPropertyException):

612

871

pass

613

872

614

873

615

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):

616

964

"""A D-Bus object with properties.

617

965

618

966

Classes inheriting from this can use the dbus_service_property

620

968

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

621

969

"""

622

970

623

@staticmethod

624

def _is_dbus_property(obj):

625

return getattr(obj, "_dbus_is_property", False)

626

627

def _get_all_dbus_properties(self):

628

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

629

"""

630

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

631

for cls in self.__class__.__mro__

632

for name, prop in inspect.getmembers(cls, self._is_dbus_property))

633

634

971

def _get_dbus_property(self, interface_name, property_name):

635

972

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

636

973

property with the specified name and interface.

637

974

"""

638

for cls in self.__class__.__mro__:

639

for name, value in inspect.getmembers(cls, self._is_dbus_property):

640

if value._dbus_name == property_name and value._dbus_interface == interface_name:

975

for cls in self.__class__.__mro__:

976

for name, value in inspect.getmembers(

977

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

978

if (value._dbus_name == property_name

979

and value._dbus_interface == interface_name):

641

980

return value.__get__(self)

642

981

643

982

# No such property

644

raise DBusPropertyNotFound(self.dbus_object_path + ":"

645

+ interface_name + "."

646

+ property_name)

647

648

649

@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",

650

997

out_signature="v")

651

998

def Get(self, interface_name, property_name):

652

999

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

670

1017

# The byte_arrays option is not supported yet on

671

1018

# signatures other than "ay".

672

1019

if prop._dbus_signature != "ay":

673

raise ValueError

674

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

675

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))

676

1025

prop(value)

677

1026

678

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

1027

@dbus.service.method(dbus.PROPERTIES_IFACE,

1028

in_signature="s",

679

1029

out_signature="a{sv}")

680

1030

def GetAll(self, interface_name):

681

1031

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

683

1033

684

1034

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

685

1035

"""

686

all = {}

687

for name, prop in self._get_all_dbus_properties():

1036

properties = {}

1037

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

688

1038

if (interface_name

689

1039

and interface_name != prop._dbus_interface):

690

1040

# Interface non-empty but did not match

694

1044

continue

695

1045

value = prop()

696

1046

if not hasattr(value, "variant_level"):

697

all[name] = value

1047

properties[name] = value

698

1048

continue

699

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

700

value.variant_level+1)

701

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

702

1060

703

1061

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

704

1062

out_signature="s",

705

1063

path_keyword='object_path',

706

1064

connection_keyword='connection')

707

1065

def Introspect(self, object_path, connection):

708

"""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.

709

1069

"""

710

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

711

connection)

1070

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1071

object_path,

1072

connection)

712

1073

try:

713

1074

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

1075

714

1076

def make_tag(document, name, prop):

715

1077

e = document.createElement("property")

716

1078

e.setAttribute("name", name)

717

1079

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

718

1080

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

719

1081

return e

1082

720

1083

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

1084

# Add property tags

721

1085

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

722

1086

for name, prop

723

in self._get_all_dbus_properties()

1087

in self._get_all_dbus_things("property")

724

1088

if prop._dbus_interface

725

1089

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

726

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)

727

1107

# Add the names to the return values for the

728

1108

# "org.freedesktop.DBus.Properties" methods

729

1109

if (if_tag.getAttribute("name")

744

1124

except (AttributeError, xml.dom.DOMException,

745

1125

xml.parsers.expat.ExpatError) as error:

746

1126

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

747

error)

748

return xmlstring

749

750

751

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):

752

1200

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

753

1201

if dt is None:

754

1202

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

755

return dbus.String(dt.isoformat(),

756

variant_level=variant_level)

757

758

class transitional_dbus_metaclass(DBusObjectWithProperties.__metaclass__):

759

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

760

for attrname, old_dbusobj in inspect.getmembers(bases[0]):

761

new_interface = getattr(old_dbusobj, "_dbus_interface", "").replace("se.bsnet.fukt.", "se.recompile.")

762

if (getattr(old_dbusobj, "_dbus_is_signal", False)

763

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

764

unwrappedfunc = dict(zip(old_dbusobj.func_code.co_freevars,

765

old_dbusobj.__closure__))["func"].cell_contents

766

newfunc = types.FunctionType(unwrappedfunc.func_code,

767

unwrappedfunc.func_globals,

768

unwrappedfunc.func_name,

769

unwrappedfunc.func_defaults,

770

unwrappedfunc.func_closure)

771

new_dbusfunc = dbus.service.signal(

772

new_interface, old_dbusobj._dbus_signature)(newfunc)

773

attr["_transitional_" + attrname] = new_dbusfunc

774

775

def fixscope(func1, func2):

776

def newcall(*args, **kwargs):

777

func1(*args, **kwargs)

778

func2(*args, **kwargs)

779

return newcall

780

781

attr[attrname] = fixscope(old_dbusobj, new_dbusfunc)

782

783

elif (getattr(old_dbusobj, "_dbus_is_method", False)

784

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

785

new_dbusfunc = (dbus.service.method

786

(new_interface,

787

old_dbusobj._dbus_in_signature,

788

old_dbusobj._dbus_out_signature)

789

(types.FunctionType

790

(old_dbusobj.func_code,

791

old_dbusobj.func_globals,

792

old_dbusobj.func_name,

793

old_dbusobj.func_defaults,

794

old_dbusobj.func_closure)))

795

796

attr[attrname] = new_dbusfunc

797

elif (getattr(old_dbusobj, "_dbus_is_property", False)

798

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

799

new_dbusfunc = (dbus_service_property

800

(new_interface,

801

old_dbusobj._dbus_signature,

802

old_dbusobj._dbus_access,

803

old_dbusobj._dbus_get_args_options["byte_arrays"])

804

(types.FunctionType

805

(old_dbusobj.func_code,

806

old_dbusobj.func_globals,

807

old_dbusobj.func_name,

808

old_dbusobj.func_defaults,

809

old_dbusobj.func_closure)))

810

811

attr[attrname] = new_dbusfunc

812

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

813

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).

1228

"""

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):

1237

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

1238

# with the wrong interface name

1239

if (not hasattr(attribute, "_dbus_interface")

1240

or not attribute._dbus_interface.startswith(

1241

orig_interface_name)):

1242

continue

1243

# Create an alternate D-Bus interface name based on

1244

# the current name

1245

alt_interface = attribute._dbus_interface.replace(

1246

orig_interface_name, alt_interface_name)

1247

interface_names.add(alt_interface)

1248

# Is this a D-Bus signal?

1249

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

1250

if sys.version_info.major == 2:

1251

# Extract the original non-method undecorated

1252

# function by black magic

1253

nonmethod_func = (dict(

1254

zip(attribute.func_code.co_freevars,

1255

attribute.__closure__))

1256

["func"].cell_contents)

1257

else:

1258

nonmethod_func = attribute

1259

# Create a new, but exactly alike, function

1260

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

1261

# with the alternate D-Bus interface name

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

1285

# Define a creator of a function to call both the

1286

# original and alternate functions, so both the

1287

# original and alternate signals gets sent when

1288

# the function is called

1289

def fixscope(func1, func2):

1290

"""This function is a scope container to pass

1291

func1 and func2 to the "call_both" function

1292

outside of its arguments"""

1293

1294

@functools.wraps(func2)

1295

def call_both(*args, **kwargs):

1296

"""This function will emit two D-Bus

1297

signals by calling func1 and func2"""

1298

func1(*args, **kwargs)

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

1305

return call_both

1306

# Create the "call_both" function and add it to

1307

# the class

1308

attr[attrname] = fixscope(attribute, new_function)

1309

# Is this a D-Bus method?

1310

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

1311

# Create a new, but exactly alike, function

1312

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

1313

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

1314

# to the class.

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

1331

# Is this a D-Bus property?

1332

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

1333

# Create a new, but exactly alike, function

1334

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

1335

# property with the alternate D-Bus interface

1336

# name. Add it to the class.

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"})

814

1394

class ClientDBus(Client, DBusObjectWithProperties):

815

1395

"""A Client class using D-Bus

816

1396

820

1400

"""

821

1401

822

1402

runtime_expansions = (Client.runtime_expansions

823

+ ("dbus_object_path",))

1403

+ ("dbus_object_path", ))

1404

1405

_interface = "se.recompile.Mandos.Client"

824

1406

825

1407

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

826

1408

827

1409

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

828

self._approvals_pending = 0

829

1410

self.bus = bus

830

1411

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

831

1412

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

832

1413

# the D-Bus

833

client_object_name = unicode(self.name).translate(

1414

client_object_name = str(self.name).translate(

834

1415

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

835

1416

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

836

self.dbus_object_path = (dbus.ObjectPath

837

("/clients/" + client_object_name))

1417

self.dbus_object_path = dbus.ObjectPath(

1418

"/clients/" + client_object_name)

838

1419

DBusObjectWithProperties.__init__(self, self.bus,

839

1420

self.dbus_object_path)

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):

1427

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

1428

its changes to DBus.

840

1429

841

def notifychangeproperty(transform_func,

842

dbus_name, type_func=lambda x: x,

843

variant_level=1):

844

""" Modify a variable so that its a property that announce its

845

changes to DBus.

846

transform_fun: Function that takes a value and transform it to

847

DBus type.

848

dbus_name: DBus name of the variable

1430

transform_fun: Function that takes a value and a variant_level

1431

and transforms it to a D-Bus type.

1432

dbus_name: D-Bus name of the variable

849

1433

type_func: Function that transform the value before sending it

850

to DBus

851

variant_level: DBus variant level. default: 1

1434

to the D-Bus. Default: no transform

1435

variant_level: D-Bus variant level. Default: 1

852

1436

"""

853

real_value = [None,]

1437

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

1438

854

1439

def setter(self, value):

855

old_value = real_value[0]

856

real_value[0] = value

857

1440

if hasattr(self, "dbus_object_path"):

858

if type_func(old_value) != type_func(real_value[0]):

859

dbus_value = transform_func(type_func(real_value[0]),

860

variant_level)

861

self.PropertyChanged(dbus.String(dbus_name),

862

dbus_value)

1441

if (not hasattr(self, attrname) or

1442

type_func(getattr(self, attrname, None))

1443

!= type_func(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())

1459

setattr(self, attrname, value)

863

1460

864

return property(lambda self: real_value[0], setter)

865

1461

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

866

1462

867

1463

expires = notifychangeproperty(datetime_to_dbus, "Expires")

868

1464

approvals_pending = notifychangeproperty(dbus.Boolean,

871

1467

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

872

1468

last_enabled = notifychangeproperty(datetime_to_dbus,

873

1469

"LastEnabled")

874

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

875

type_func = lambda checker: checker is not None)

1470

checker = notifychangeproperty(

1471

dbus.Boolean, "CheckerRunning",

1472

type_func = lambda checker: checker is not None)

876

1473

last_checked_ok = notifychangeproperty(datetime_to_dbus,

877

1474

"LastCheckedOK")

878

last_approval_request = notifychangeproperty(datetime_to_dbus,

879

"LastApprovalRequest")

1475

last_checker_status = notifychangeproperty(dbus.Int16,

1476

"LastCheckerStatus")

1477

last_approval_request = notifychangeproperty(

1478

datetime_to_dbus, "LastApprovalRequest")

880

1479

approved_by_default = notifychangeproperty(dbus.Boolean,

881

1480

"ApprovedByDefault")

882

approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",

883

type_func = _timedelta_to_milliseconds)

884

approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",

885

type_func = _timedelta_to_milliseconds)

1481

approval_delay = notifychangeproperty(

1482

dbus.UInt64, "ApprovalDelay",

1483

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

1484

approval_duration = notifychangeproperty(

1485

dbus.UInt64, "ApprovalDuration",

1486

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

886

1487

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

887

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

888

type_func = _timedelta_to_milliseconds)

889

extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",

890

type_func = _timedelta_to_milliseconds)

891

interval = notifychangeproperty(dbus.UInt16, "Interval",

892

type_func = _timedelta_to_milliseconds)

1488

timeout = notifychangeproperty(

1489

dbus.UInt64, "Timeout",

1490

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

1491

extended_timeout = notifychangeproperty(

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)

893

1497

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

1498

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

1499

invalidate_only=True)

894

1500

895

1501

del notifychangeproperty

896

1502

903

1509

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

904

1510

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

905

1511

906

def checker_callback(self, pid, condition, command,

907

*args, **kwargs):

908

self.checker_callback_tag = None

909

self.checker = None

910

if os.WIFEXITED(condition):

911

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:

912

1519

# Emit D-Bus signal

913

1520

self.CheckerCompleted(dbus.Int16(exitstatus),

914

dbus.Int64(condition),

1521

# This is specific to GNU libC

1522

dbus.Int64(exitstatus << 8),

915

1523

dbus.String(command))

916

1524

else:

917

1525

# Emit D-Bus signal

918

1526

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

919

dbus.Int64(condition),

1527

dbus.Int64(

1528

# This is specific to GNU libC

1529

(exitstatus << 8)

1530

| self.last_checker_signal),

920

1531

dbus.String(command))

921

922

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

923

*args, **kwargs)

1532

return ret

924

1533

925

1534

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

926

old_checker = self.checker

927

if self.checker is not None:

928

old_checker_pid = self.checker.pid

929

else:

930

old_checker_pid = None

1535

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

931

1536

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

932

1537

# Only if new checker process was started

933

1538

if (self.checker is not None

937

1542

return r

938

1543

939

1544

def _reset_approved(self):

940

self._approved = None

1545

self.approved = None

941

1546

return False

942

1547

943

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)

944

1552

self.send_changedstate()

945

self._approved = value

946

gobject.timeout_add(_timedelta_to_milliseconds

947

(self.approval_duration),

948

self._reset_approved)

949

950

1553

951

1554

## D-Bus methods, signals & properties

952

_interface = "se.bsnet.fukt.Mandos.Client"

953

1555

1556

## Interfaces

1557

954

1558

## Signals

955

1559

956

1560

# CheckerCompleted - signal

966

1570

pass

967

1571

968

1572

# PropertyChanged - signal

1573

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

969

1574

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

970

1575

def PropertyChanged(self, property, value):

971

1576

"D-Bus signal"

1005

1610

self.checked_ok()

1006

1611

1007

1612

# Enable - method

1613

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

1008

1614

@dbus.service.method(_interface)

1009

1615

def Enable(self):

1010

1616

"D-Bus method"

1011

1617

self.enable()

1012

1618

1013

1619

# StartChecker - method

1620

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

1014

1621

@dbus.service.method(_interface)

1015

1622

def StartChecker(self):

1016

1623

"D-Bus method"

1017

1624

self.start_checker()

1018

1625

1019

1626

# Disable - method

1627

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

1020

1628

@dbus.service.method(_interface)

1021

1629

def Disable(self):

1022

1630

"D-Bus method"

1023

1631

self.disable()

1024

1632

1025

1633

# StopChecker - method

1634

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

1026

1635

@dbus.service.method(_interface)

1027

1636

def StopChecker(self):

1028

1637

self.stop_checker()

1035

1644

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

1036

1645

1037

1646

# ApprovedByDefault - property

1038

@dbus_service_property(_interface, signature="b",

1647

@dbus_service_property(_interface,

1648

signature="b",

1039

1649

access="readwrite")

1040

1650

def ApprovedByDefault_dbus_property(self, value=None):

1041

1651

if value is None: # get

1043

1653

self.approved_by_default = bool(value)

1044

1654

1045

1655

# ApprovalDelay - property

1046

@dbus_service_property(_interface, signature="t",

1656

@dbus_service_property(_interface,

1657

signature="t",

1047

1658

access="readwrite")

1048

1659

def ApprovalDelay_dbus_property(self, value=None):

1049

1660

if value is None: # get

1050

return dbus.UInt64(self.approval_delay_milliseconds())

1661

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

1662

* 1000)

1051

1663

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

1052

1664

1053

1665

# ApprovalDuration - property

1054

@dbus_service_property(_interface, signature="t",

1666

@dbus_service_property(_interface,

1667

signature="t",

1055

1668

access="readwrite")

1056

1669

def ApprovalDuration_dbus_property(self, value=None):

1057

1670

if value is None: # get

1058

return dbus.UInt64(_timedelta_to_milliseconds(

1059

self.approval_duration))

1671

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

1672

* 1000)

1060

1673

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

1061

1674

1062

1675

# Name - property

1676

@dbus_annotations(

1677

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

1063

1678

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

1064

1679

def Name_dbus_property(self):

1065

1680

return dbus.String(self.name)

1066

1681

1067

1682

# Fingerprint - property

1683

@dbus_annotations(

1684

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

1068

1685

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

1069

1686

def Fingerprint_dbus_property(self):

1070

1687

return dbus.String(self.fingerprint)

1071

1688

1072

1689

# Host - property

1073

@dbus_service_property(_interface, signature="s",

1690

@dbus_service_property(_interface,

1691

signature="s",

1074

1692

access="readwrite")

1075

1693

def Host_dbus_property(self, value=None):

1076

1694

if value is None: # get

1077

1695

return dbus.String(self.host)

1078

self.host = value

1696

self.host = str(value)

1079

1697

1080

1698

# Created - property

1699

@dbus_annotations(

1700

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

1081

1701

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

1082

1702

def Created_dbus_property(self):

1083

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

1703

return datetime_to_dbus(self.created)

1084

1704

1085

1705

# LastEnabled - property

1086

1706

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

1088

1708

return datetime_to_dbus(self.last_enabled)

1089

1709

1090

1710

# Enabled - property

1091

@dbus_service_property(_interface, signature="b",

1711

@dbus_service_property(_interface,

1712

signature="b",

1092

1713

access="readwrite")

1093

1714

def Enabled_dbus_property(self, value=None):

1094

1715

if value is None: # get

1099

1720

self.disable()

1100

1721

1101

1722

# LastCheckedOK - property

1102

@dbus_service_property(_interface, signature="s",

1723

@dbus_service_property(_interface,

1724

signature="s",

1103

1725

access="readwrite")

1104

1726

def LastCheckedOK_dbus_property(self, value=None):

1105

1727

if value is not None:

1107

1729

return

1108

1730

return datetime_to_dbus(self.last_checked_ok)

1109

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

1110

1737

# Expires - property

1111

1738

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

1112

1739

def Expires_dbus_property(self):

1118

1745

return datetime_to_dbus(self.last_approval_request)

1119

1746

1120

1747

# Timeout - property

1121

@dbus_service_property(_interface, signature="t",

1748

@dbus_service_property(_interface,

1749

signature="t",

1122

1750

access="readwrite")

1123

1751

def Timeout_dbus_property(self, value=None):

1124

1752

if value is None: # get

1125

return dbus.UInt64(self.timeout_milliseconds())

1753

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

1754

old_timeout = self.timeout

1126

1755

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

1127

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

1128

return

1129

# Reschedule timeout

1130

gobject.source_remove(self.disable_initiator_tag)

1131

self.disable_initiator_tag = None

1132

self.expires = None

1133

time_to_die = (self.

1134

_timedelta_to_milliseconds((self

1135

.last_checked_ok

1136

+ self.timeout)

1137

- datetime.datetime

1138

.utcnow()))

1139

if time_to_die <= 0:

1140

# The timeout has passed

1141

self.disable()

1142

else:

1143

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

1144

+ datetime.timedelta(milliseconds = time_to_die))

1145

self.disable_initiator_tag = (gobject.timeout_add

1146

(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)

1147

1771

1148

1772

# ExtendedTimeout - property

1149

@dbus_service_property(_interface, signature="t",

1773

@dbus_service_property(_interface,

1774

signature="t",

1150

1775

access="readwrite")

1151

1776

def ExtendedTimeout_dbus_property(self, value=None):

1152

1777

if value is None: # get

1153

return dbus.UInt64(self.extended_timeout_milliseconds())

1778

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

1779

* 1000)

1154

1780

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

1155

1781

1156

1782

# Interval - property

1157

@dbus_service_property(_interface, signature="t",

1783

@dbus_service_property(_interface,

1784

signature="t",

1158

1785

access="readwrite")

1159

1786

def Interval_dbus_property(self, value=None):

1160

1787

if value is None: # get

1161

return dbus.UInt64(self.interval_milliseconds())

1788

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

1162

1789

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

1163

1790

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

1164

1791

return

1165

# Reschedule checker run

1166

gobject.source_remove(self.checker_initiator_tag)

1167

self.checker_initiator_tag = (gobject.timeout_add

1168

(value, self.start_checker))

1169

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

1170

1798

1171

1799

# Checker - property

1172

@dbus_service_property(_interface, signature="s",

1800

@dbus_service_property(_interface,

1801

signature="s",

1173

1802

access="readwrite")

1174

1803

def Checker_dbus_property(self, value=None):

1175

1804

if value is None: # get

1176

1805

return dbus.String(self.checker_command)

1177

self.checker_command = value

1806

self.checker_command = str(value)

1178

1807

1179

1808

# CheckerRunning - property

1180

@dbus_service_property(_interface, signature="b",

1809

@dbus_service_property(_interface,

1810

signature="b",

1181

1811

access="readwrite")

1182

1812

def CheckerRunning_dbus_property(self, value=None):

1183

1813

if value is None: # get

1188

1818

self.stop_checker()

1189

1819

1190

1820

# ObjectPath - property

1821

@dbus_annotations(

1822

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

1823

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

1191

1824

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

1192

1825

def ObjectPath_dbus_property(self):

1193

1826

return self.dbus_object_path # is already a dbus.ObjectPath

1194

1827

1195

1828

# Secret = property

1196

@dbus_service_property(_interface, signature="ay",

1197

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)

1198

1836

def Secret_dbus_property(self, value):

1199

self.secret = str(value)

1837

self.secret = bytes(value)

1200

1838

1201

1839

del _interface

1202

1840

1206

1844

self._pipe = child_pipe

1207

1845

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

1208

1846

if not self._pipe.recv():

1209

raise KeyError()

1847

raise KeyError(fpr)

1210

1848

1211

1849

def __getattribute__(self, name):

1212

if(name == '_pipe'):

1850

if name == '_pipe':

1213

1851

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

1214

1852

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

1215

1853

data = self._pipe.recv()

1216

1854

if data[0] == 'data':

1217

1855

return data[1]

1218

1856

if data[0] == 'function':

1857

1219

1858

def func(*args, **kwargs):

1220

1859

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

1221

1860

return self._pipe.recv()[1]

1861

1222

1862

return func

1223

1863

1224

1864

def __setattr__(self, name, value):

1225

if(name == '_pipe'):

1865

if name == '_pipe':

1226

1866

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

1227

1867

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

1228

1868

1229

class ClientDBusTransitional(ClientDBus):

1230

__metaclass__ = transitional_dbus_metaclass

1231

1869

1232

1870

class ClientHandler(socketserver.BaseRequestHandler, object):

1233

1871

"""A class to handle client connections.

1238

1876

def handle(self):

1239

1877

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

1240

1878

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

1241

unicode(self.client_address))

1879

str(self.client_address))

1242

1880

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

1243

1881

self.server.child_pipe.fileno())

1244

1882

1245

session = (gnutls.connection

1246

.ClientSession(self.request,

1247

gnutls.connection

1248

.X509Credentials()))

1883

session = gnutls.connection.ClientSession(

1884

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

1249

1885

1250

1886

# Note: gnutls.connection.X509Credentials is really a

1251

1887

# generic GnuTLS certificate credentials object so long as

1260

1896

priority = self.server.gnutls_priority

1261

1897

if priority is None:

1262

1898

priority = "NORMAL"

1263

(gnutls.library.functions

1264

.gnutls_priority_set_direct(session._c_object,

1265

priority, None))

1899

gnutls.library.functions.gnutls_priority_set_direct(

1900

session._c_object, priority, None)

1266

1901

1267

1902

# Start communication using the Mandos protocol

1268

1903

# Get protocol number

1270

1905

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

1271

1906

try:

1272

1907

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

1273

raise RuntimeError

1908

raise RuntimeError(line)

1274

1909

except (ValueError, IndexError, RuntimeError) as error:

1275

1910

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

1276

1911

return

1288

1923

approval_required = False

1289

1924

try:

1290

1925

try:

1291

fpr = self.fingerprint(self.peer_certificate

1292

(session))

1926

fpr = self.fingerprint(

1927

self.peer_certificate(session))

1293

1928

except (TypeError,

1294

1929

gnutls.errors.GNUTLSError) as error:

1295

1930

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

1310

1945

while True:

1311

1946

if not client.enabled:

1312

1947

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

1313

client.name)

1948

client.name)

1314

1949

if self.server.use_dbus:

1315

1950

# Emit D-Bus signal

1316

client.Rejected("Disabled")

1951

client.Rejected("Disabled")

1317

1952

return

1318

1953

1319

if client._approved or not client.approval_delay:

1954

if client.approved or not client.approval_delay:

1320

1955

#We are approved or approval is disabled

1321

1956

break

1322

elif client._approved is None:

1957

elif client.approved is None:

1323

1958

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

1324

1959

client.name)

1325

1960

if self.server.use_dbus:

1326

1961

# Emit D-Bus signal

1327

1962

client.NeedApproval(

1328

client.approval_delay_milliseconds(),

1329

client.approved_by_default)

1963

client.approval_delay.total_seconds()

1964

* 1000, client.approved_by_default)

1330

1965

else:

1331

1966

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

1332

1967

client.name)

1336

1971

return

1337

1972

1338

1973

#wait until timeout or approved

1339

#x = float(client._timedelta_to_milliseconds(delay))

1340

1974

time = datetime.datetime.now()

1341

1975

client.changedstate.acquire()

1342

client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))

1976

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

1343

1977

client.changedstate.release()

1344

1978

time2 = datetime.datetime.now()

1345

1979

if (time2 - time) >= delay:

1361

1995

try:

1362

1996

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

1363

1997

except gnutls.errors.GNUTLSError as error:

1364

logger.warning("gnutls send failed")

1998

logger.warning("gnutls send failed",

1999

exc_info=error)

1365

2000

return

1366

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

1367

sent, len(client.secret)

1368

- (sent_size + sent))

2001

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

2002

len(client.secret) - (sent_size

2003

+ sent))

1369

2004

sent_size += sent

1370

2005

1371

2006

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

1372

# bump the timeout as if seen

1373

client.checked_ok(client.extended_timeout)

2007

# bump the timeout using extended_timeout

2008

client.bump_timeout(client.extended_timeout)

1374

2009

if self.server.use_dbus:

1375

2010

# Emit D-Bus signal

1376

2011

client.GotSecret()

1381

2016

try:

1382

2017

session.bye()

1383

2018

except gnutls.errors.GNUTLSError as error:

1384

logger.warning("GnuTLS bye failed")

2019

logger.warning("GnuTLS bye failed",

2020

exc_info=error)

1385

2021

1386

2022

@staticmethod

1387

2023

def peer_certificate(session):

1388

2024

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

1389

2025

# If not an OpenPGP certificate...

1390

if (gnutls.library.functions

1391

.gnutls_certificate_type_get(session._c_object)

2026

if (gnutls.library.functions.gnutls_certificate_type_get(

2027

session._c_object)

1392

2028

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1393

2029

# ...do the normal thing

1394

2030

return session.peer_certificate

1408

2044

def fingerprint(openpgp):

1409

2045

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1410

2046

# New GnuTLS "datum" with the OpenPGP public key

1411

datum = (gnutls.library.types

1412

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

1413

ctypes.POINTER

1414

(ctypes.c_ubyte)),

1415

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)))

1416

2051

# New empty GnuTLS certificate

1417

2052

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1418

(gnutls.library.functions

1419

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2053

gnutls.library.functions.gnutls_openpgp_crt_init(

2054

ctypes.byref(crt))

1420

2055

# Import the OpenPGP public key into the certificate

1421

(gnutls.library.functions

1422

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

1423

gnutls.library.constants

1424

.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)

1425

2059

# Verify the self signature in the key

1426

2060

crtverify = ctypes.c_uint()

1427

(gnutls.library.functions

1428

.gnutls_openpgp_crt_verify_self(crt, 0,

1429

ctypes.byref(crtverify)))

2061

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

2062

crt, 0, ctypes.byref(crtverify))

1430

2063

if crtverify.value != 0:

1431

2064

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1432

raise (gnutls.errors.CertificateSecurityError

1433

("Verify failed"))

2065

raise gnutls.errors.CertificateSecurityError(

2066

"Verify failed")

1434

2067

# New buffer for the fingerprint

1435

2068

buf = ctypes.create_string_buffer(20)

1436

2069

buf_len = ctypes.c_size_t()

1437

2070

# Get the fingerprint from the certificate into the buffer

1438

(gnutls.library.functions

1439

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

1440

ctypes.byref(buf_len)))

2071

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

2072

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

1441

2073

# Deinit the certificate

1442

2074

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1443

2075

# Convert the buffer to a Python bytestring

1444

2076

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

1445

2077

# Convert the bytestring to hexadecimal notation

1446

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

2078

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

1447

2079

return hex_fpr

1448

2080

1449

2081

1450

2082

class MultiprocessingMixIn(object):

1451

2083

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

2084

1452

2085

def sub_process_main(self, request, address):

1453

2086

try:

1454

2087

self.finish_request(request, address)

1455

except:

2088

except Exception:

1456

2089

self.handle_error(request, address)

1457

2090

self.close_request(request)

1458

2091

1459

2092

def process_request(self, request, address):

1460

2093

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

1461

multiprocessing.Process(target = self.sub_process_main,

1462

args = (request, address)).start()

2094

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

2095

args = (request, address))

2096

proc.start()

2097

return proc

1463

2098

1464

2099

1465

2100

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1466

2101

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

2102

1467

2103

def process_request(self, request, client_address):

1468

2104

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

1469

2105

1471

2107

"""

1472

2108

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1473

2109

1474

super(MultiprocessingMixInWithPipe,

1475

self).process_request(request, client_address)

2110

proc = MultiprocessingMixIn.process_request(self, request,

2111

client_address)

1476

2112

self.child_pipe.close()

1477

self.add_pipe(parent_pipe)

2113

self.add_pipe(parent_pipe, proc)

1478

2114

1479

def add_pipe(self, parent_pipe):

2115

def add_pipe(self, parent_pipe, proc):

1480

2116

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

1481

raise NotImplementedError

2117

raise NotImplementedError()

1482

2118

1483

2119

1484

2120

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1490

2126

interface: None or a network interface name (string)

1491

2127

use_ipv6: Boolean; to use IPv6 or not

1492

2128

"""

2129

1493

2130

def __init__(self, server_address, RequestHandlerClass,

1494

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

"""

1495

2137

self.interface = interface

1496

2138

if use_ipv6:

1497

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.

1498

2166

socketserver.TCPServer.__init__(self, server_address,

1499

2167

RequestHandlerClass)

2168

1500

2169

def server_bind(self):

1501

2170

"""This overrides the normal server_bind() function

1502

2171

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

1508

2177

self.interface)

1509

2178

else:

1510

2179

try:

1511

self.socket.setsockopt(socket.SOL_SOCKET,

1512

SO_BINDTODEVICE,

1513

str(self.interface

1514

+ '\0'))

2180

self.socket.setsockopt(

2181

socket.SOL_SOCKET, SO_BINDTODEVICE,

2182

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

1515

2183

except socket.error as error:

1516

if error[0] == errno.EPERM:

1517

logger.error("No permission to"

1518

" bind to interface %s",

1519

self.interface)

1520

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:

1521

2188

logger.error("SO_BINDTODEVICE not available;"

1522

2189

" cannot bind to interface %s",

1523

2190

self.interface)

2191

elif error.errno == errno.ENODEV:

2192

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

2193

" cannot bind", self.interface)

1524

2194

else:

1525

2195

raise

1526

2196

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

1529

2199

if self.address_family == socket.AF_INET6:

1530

2200

any_address = "::" # in6addr_any

1531

2201

else:

1532

any_address = socket.INADDR_ANY

2202

any_address = "0.0.0.0" # INADDR_ANY

1533

2203

self.server_address = (any_address,

1534

2204

self.server_address[1])

1535

2205

elif not self.server_address[1]:

1536

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

1537

0)

2206

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

1538

2207

# if self.interface:

1539

2208

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

1540

2209

# 0, # port

1554

2223

1555

2224

Assumes a gobject.MainLoop event loop.

1556

2225

"""

2226

1557

2227

def __init__(self, server_address, RequestHandlerClass,

1558

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

1559

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):

1560

2234

self.enabled = False

1561

2235

self.clients = clients

1562

2236

if self.clients is None:

1563

self.clients = set()

2237

self.clients = {}

1564

2238

self.use_dbus = use_dbus

1565

2239

self.gnutls_priority = gnutls_priority

1566

2240

IPv6_TCPServer.__init__(self, server_address,

1567

2241

RequestHandlerClass,

1568

2242

interface = interface,

1569

use_ipv6 = use_ipv6)

2243

use_ipv6 = use_ipv6,

2244

socketfd = socketfd)

2245

1570

2246

def server_activate(self):

1571

2247

if self.enabled:

1572

2248

return socketserver.TCPServer.server_activate(self)

2249

1573

2250

def enable(self):

1574

2251

self.enabled = True

1575

def add_pipe(self, parent_pipe):

2252

2253

def add_pipe(self, parent_pipe, proc):

1576

2254

# Call "handle_ipc" for both data and EOF events

1577

gobject.io_add_watch(parent_pipe.fileno(),

1578

gobject.IO_IN | gobject.IO_HUP,

1579

functools.partial(self.handle_ipc,

1580

parent_pipe = parent_pipe))

1581

1582

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

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))

2261

2262

def handle_ipc(self, source, condition,

2263

parent_pipe=None,

2264

proc = None,

1583

2265

client_object=None):

1584

condition_names = {

1585

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

1586

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

1587

# blocking).

1588

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

1589

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

1590

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

1591

# broken, usually for pipes and

1592

# sockets).

1593

}

1594

conditions_string = ' | '.join(name

1595

for cond, name in

1596

condition_names.iteritems()

1597

if cond & condition)

1598

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

1599

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

2266

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

2267

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

2268

# Wait for other process to exit

2269

proc.join()

1600

2270

return False

1601

2271

1602

2272

# Read a request from the child

1607

2277

fpr = request[1]

1608

2278

address = request[2]

1609

2279

1610

for c in self.clients:

2280

for c in self.clients.itervalues():

1611

2281

if c.fingerprint == fpr:

1612

2282

client = c

1613

2283

break

1616

2286

"dress: %s", fpr, address)

1617

2287

if self.use_dbus:

1618

2288

# Emit D-Bus signal

1619

mandos_dbus_service.ClientNotFound(fpr, address[0])

2289

mandos_dbus_service.ClientNotFound(fpr,

2290

address[0])

1620

2291

parent_pipe.send(False)

1621

2292

return False

1622

2293

1623

gobject.io_add_watch(parent_pipe.fileno(),

1624

gobject.IO_IN | gobject.IO_HUP,

1625

functools.partial(self.handle_ipc,

1626

parent_pipe = parent_pipe,

1627

client_object = 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))

1628

2301

parent_pipe.send(True)

1629

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

2302

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

2303

# same fileno

1630

2304

return False

1631

2305

if command == 'funcall':

1632

2306

funcname = request[1]

1633

2307

args = request[2]

1634

2308

kwargs = request[3]

1635

2309

1636

parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))

2310

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

2311

funcname)(*args,

2312

**kwargs)))

1637

2313

1638

2314

if command == 'getattr':

1639

2315

attrname = request[1]

1640

if callable(client_object.__getattribute__(attrname)):

1641

parent_pipe.send(('function',))

2316

if isinstance(client_object.__getattribute__(attrname),

2317

collections.Callable):

2318

parent_pipe.send(('function', ))

1642

2319

else:

1643

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

2320

parent_pipe.send((

2321

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

1644

2322

1645

2323

if command == 'setattr':

1646

2324

attrname = request[1]

1650

2328

return True

1651

2329

1652

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

1653

2427

def string_to_delta(interval):

1654

2428

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

1655

2429

1666

2440

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

1667

2441

datetime.timedelta(0, 330)

1668

2442

"""

2443

2444

try:

2445

return rfc3339_duration_to_delta(interval)

2446

except ValueError:

2447

pass

2448

1669

2449

timevalue = datetime.timedelta(0)

1670

2450

for s in interval.split():

1671

2451

try:

1672

suffix = unicode(s[-1])

2452

suffix = s[-1]

1673

2453

value = int(s[:-1])

1674

2454

if suffix == "d":

1675

2455

delta = datetime.timedelta(value)

1682

2462

elif suffix == "w":

1683

2463

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

1684

2464

else:

1685

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

1686

except (ValueError, IndexError) as e:

2465

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

2466

except IndexError as e:

1687

2467

raise ValueError(*(e.args))

1688

2468

timevalue += delta

1689

2469

return timevalue

1690

2470

1691

2471

1692

def if_nametoindex(interface):

1693

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

1694

1695

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

1696

global if_nametoindex

1697

try:

1698

if_nametoindex = (ctypes.cdll.LoadLibrary

1699

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

1700

.if_nametoindex)

1701

except (OSError, AttributeError):

1702

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

1703

def if_nametoindex(interface):

1704

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

1705

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

1706

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

1707

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1708

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

1709

interface))

1710

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

1711

ifreq[16:20])[0]

1712

return interface_index

1713

return if_nametoindex(interface)

1714

1715

1716

2472

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

1717

2473

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

1718

2474

1726

2482

sys.exit()

1727

2483

if not noclose:

1728

2484

# Close all standard open file descriptors

1729

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

2485

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

1730

2486

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

1731

2487

raise OSError(errno.ENODEV,

1732

"%s not a character device"

1733

% os.path.devnull)

2488

"{} not a character device"

2489

.format(os.devnull))

1734

2490

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

1735

2491

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

1736

2492

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

1745

2501

1746

2502

parser = argparse.ArgumentParser()

1747

2503

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

1748

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

2504

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

1749

2505

help="show version number and exit")

1750

2506

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

1751

2507

help="Bind to interface IF")

1757

2513

help="Run self-test")

1758

2514

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

1759

2515

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

1760

" to terminal")

2516

" to terminal", default=None)

1761

2517

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

1762

2518

help="Debug level for stdout output")

1763

2519

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

1770

2526

" files")

1771

2527

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

1772

2528

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

1773

" system bus interface")

2529

" system bus interface", default=None)

1774

2530

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

1775

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

1776

2547

options = parser.parse_args()

1777

2548

1778

2549

if options.check:

1779

2550

import doctest

1780

doctest.testmod()

1781

sys.exit()

2551

fail_count, test_count = doctest.testmod()

2552

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

1782

2553

1783

2554

# Default values for config file for server-global settings

1784

2555

server_defaults = { "interface": "",

1786

2557

"port": "",

1787

2558

"debug": "False",

1788

2559

"priority":

1789

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

2560

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

2561

":+SIGN-DSA-SHA256",

1790

2562

"servicename": "Mandos",

1791

2563

"use_dbus": "True",

1792

2564

"use_ipv6": "True",

1793

2565

"debuglevel": "",

1794

}

2566

"restore": "True",

2567

"socket": "",

2568

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

2569

"foreground": "False",

2570

"zeroconf": "True",

2571

}

1795

2572

1796

2573

# Parse config file for server-global settings

1797

2574

server_config = configparser.SafeConfigParser(server_defaults)

1798

2575

del server_defaults

1799

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

1800

"mandos.conf"))

2576

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

1801

2577

# Convert the SafeConfigParser object to a dict

1802

2578

server_settings = server_config.defaults()

1803

2579

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

1804

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

2580

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

1805

2581

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

1806

2582

option)

1807

2583

if server_settings["port"]:

1808

2584

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

1809

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"])

1810

2595

del server_config

1811

2596

1812

2597

# Override the settings from the config file with command line

1813

2598

# options, if set.

1814

2599

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

1815

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

1816

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

2600

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

2601

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

2602

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

1817

2603

value = getattr(options, option)

1818

2604

if value is not None:

1819

2605

server_settings[option] = value

1820

2606

del options

1821

2607

# Force all strings to be unicode

1822

2608

for option in server_settings.keys():

1823

if type(server_settings[option]) is str:

1824

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

1825

2619

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

1826

2620

1827

2621

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

1828

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

1829

2628

# For convenience

1830

2629

debug = server_settings["debug"]

1831

2630

debuglevel = server_settings["debuglevel"]

1832

2631

use_dbus = server_settings["use_dbus"]

1833

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)

1834

2646

1835

2647

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

1836

syslogger.setFormatter(logging.Formatter

1837

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

1838

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

1839

% server_settings["servicename"]))

2648

syslogger.setFormatter(

2649

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

2650

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

2651

server_settings["servicename"])))

1840

2652

1841

2653

# Parse config file with clients

1842

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

1843

"extended_timeout": "15m",

1844

"interval": "2m",

1845

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

1846

"host": "",

1847

"approval_delay": "0s",

1848

"approval_duration": "1s",

1849

}

1850

client_config = configparser.SafeConfigParser(client_defaults)

2654

client_config = configparser.SafeConfigParser(Client

2655

.client_defaults)

1851

2656

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

1852

2657

"clients.conf"))

1853

2658

1854

2659

global mandos_dbus_service

1855

2660

mandos_dbus_service = None

1856

2661

1857

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

1858

server_settings["port"]),

1859

ClientHandler,

1860

interface=(server_settings["interface"]

1861

or None),

1862

use_ipv6=use_ipv6,

1863

gnutls_priority=

1864

server_settings["priority"],

1865

use_dbus=use_dbus)

1866

if not debug:

1867

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

1868

2678

try:

1869

pidfile = open(pidfilename, "w")

1870

except IOError:

1871

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)

1872

2683

1873

try:

1874

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

1875

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

1876

except KeyError:

2684

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

1877

2685

try:

1878

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

1879

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

2686

uid = pwd.getpwnam(name).pw_uid

2687

gid = pwd.getpwnam(name).pw_gid

2688

break

1880

2689

except KeyError:

1881

try:

1882

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

1883

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

1884

except KeyError:

1885

uid = 65534

1886

gid = 65534

2690

continue

2691

else:

2692

uid = 65534

2693

gid = 65534

1887

2694

try:

1888

2695

os.setgid(gid)

1889

2696

os.setuid(uid)

1890

2697

except OSError as error:

1891

if error[0] != errno.EPERM:

1892

raise error

1893

1894

if not debug and not debuglevel:

1895

syslogger.setLevel(logging.WARNING)

1896

console.setLevel(logging.WARNING)

1897

if debuglevel:

1898

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

1899

syslogger.setLevel(level)

1900

console.setLevel(level)

2698

if error.errno != errno.EPERM:

2699

raise

1901

2700

1902

2701

if debug:

1903

2702

# Enable all possible GnuTLS debugging

1910

2709

def debug_gnutls(level, string):

1911

2710

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

1912

2711

1913

(gnutls.library.functions

1914

.gnutls_global_set_log_function(debug_gnutls))

2712

gnutls.library.functions.gnutls_global_set_log_function(

2713

debug_gnutls)

1915

2714

1916

2715

# Redirect stdin so all checkers get /dev/null

1917

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

2716

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

1918

2717

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

1919

2718

if null > 2:

1920

2719

os.close(null)

1921

else:

1922

# No console logging

1923

logger.removeHandler(console)

1924

2720

1925

2721

# Need to fork before connecting to D-Bus

1926

if not debug:

2722

if not foreground:

1927

2723

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

1928

2724

daemon()

1929

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

1930

2730

global main_loop

1931

2731

# From the Avahi example code

1932

DBusGMainLoop(set_as_default=True )

2732

DBusGMainLoop(set_as_default=True)

1933

2733

main_loop = gobject.MainLoop()

1934

2734

bus = dbus.SystemBus()

1935

2735

# End of Avahi example code

1936

2736

if use_dbus:

1937

2737

try:

1938

bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",

1939

bus, do_not_queue=True)

1940

bus_name2 = dbus.service.BusName("se.recompile.Mandos",

1941

bus, do_not_queue=True)

1942

except dbus.exceptions.NameExistsException as e:

1943

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

2738

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

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)

1944

2746

use_dbus = False

1945

2747

server_settings["use_dbus"] = False

1946

2748

tcp_server.use_dbus = False

1947

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1948

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

1949

servicetype = "_mandos._tcp",

1950

protocol = protocol, bus = bus)

1951

if server_settings["interface"]:

1952

service.interface = (if_nametoindex

1953

(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"))

1954

2759

1955

2760

global multiprocessing_manager

1956

2761

multiprocessing_manager = multiprocessing.Manager()

1957

2762

1958

2763

client_class = Client

1959

2764

if use_dbus:

1960

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

1961

def client_config_items(config, section):

1962

special_settings = {

1963

"approved_by_default":

1964

lambda: config.getboolean(section,

1965

"approved_by_default"),

1966

}

1967

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))

1968

2850

try:

1969

yield (name, special_settings[name]())

1970

except KeyError:

1971

yield (name, value)

1972

1973

tcp_server.clients.update(set(

1974

client_class(name = section,

1975

config= dict(client_config_items(

1976

client_config, section)))

1977

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

1978

2876

if not tcp_server.clients:

1979

2877

logger.warning("No clients defined")

1980

1981

if not debug:

1982

try:

1983

with pidfile:

1984

pid = os.getpid()

1985

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

1986

del pidfile

1987

except IOError:

1988

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

1989

pidfilename, pid)

1990

except NameError:

1991

# "pidfile" was never created

1992

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

1993

2889

del pidfilename

1994

1995

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

1996

2890

1997

2891

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

1998

2892

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

1999

2893

2000

2894

if use_dbus:

2001

class MandosDBusService(dbus.service.Object):

2895

2896

@alternate_dbus_interfaces(

2897

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

2898

class MandosDBusService(DBusObjectWithObjectManager):

2002

2899

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

2900

2003

2901

def __init__(self):

2004

2902

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

2005

_interface = "se.bsnet.fukt.Mandos"

2903

2904

_interface = "se.recompile.Mandos"

2006

2905

2007

2906

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

2008

2907

def ClientAdded(self, objpath):

2014

2913

"D-Bus signal"

2015

2914

pass

2016

2915

2916

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

2917

"true"})

2017

2918

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

2018

2919

def ClientRemoved(self, objpath, name):

2019

2920

"D-Bus signal"

2020

2921

pass

2021

2922

2923

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

2924

"true"})

2022

2925

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

2023

2926

def GetAllClients(self):

2024

2927

"D-Bus method"

2025

return dbus.Array(c.dbus_object_path

2026

for c in tcp_server.clients)

2928

return dbus.Array(c.dbus_object_path for c in

2929

tcp_server.clients.itervalues())

2027

2930

2931

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

2932

"true"})

2028

2933

@dbus.service.method(_interface,

2029

2934

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

2030

2935

def GetAllClientsWithProperties(self):

2031

2936

"D-Bus method"

2032

2937

return dbus.Dictionary(

2033

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

2034

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() },

2035

2941

signature="oa{sv}")

2036

2942

2037

2943

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

2038

2944

def RemoveClient(self, object_path):

2039

2945

"D-Bus method"

2040

for c in tcp_server.clients:

2946

for c in tcp_server.clients.itervalues():

2041

2947

if c.dbus_object_path == object_path:

2042

tcp_server.clients.remove(c)

2948

del tcp_server.clients[c.name]

2043

2949

c.remove_from_connection()

2044

# Don't signal anything except ClientRemoved

2950

# Don't signal the disabling

2045

2951

c.disable(quiet=True)

2046

# Emit D-Bus signal

2047

self.ClientRemoved(object_path, c.name)

2952

# Emit D-Bus signal for removal

2953

self.client_removed_signal(c)

2048

2954

return

2049

2955

raise KeyError(object_path)

2050

2956

2051

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)

2052

2994

2053

class MandosDBusServiceTransitional(MandosDBusService):

2054

__metaclass__ = transitional_dbus_metaclass

2055

mandos_dbus_service = MandosDBusServiceTransitional()

2995

mandos_dbus_service = MandosDBusService()

2056

2996

2057

2997

def cleanup():

2058

2998

"Cleanup function; run on exit"

2059

service.cleanup()

2060

2999

if zeroconf:

3000

service.cleanup()

3001

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

2061

3060

while tcp_server.clients:

2062

client = tcp_server.clients.pop()

3061

name, client = tcp_server.clients.popitem()

2063

3062

if use_dbus:

2064

3063

client.remove_from_connection()

2065

client.disable_hook = None

2066

# Don't signal anything except ClientRemoved

3064

# Don't signal the disabling

2067

3065

client.disable(quiet=True)

2068

if use_dbus:

2069

# Emit D-Bus signal

2070

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2071

client.name)

3066

# Emit D-Bus signal for removal

3067

mandos_dbus_service.client_removed_signal(client)

3068

client_settings.clear()

2072

3069

2073

3070

atexit.register(cleanup)

2074

3071

2075

for client in tcp_server.clients:

3072

for client in tcp_server.clients.itervalues():

2076

3073

if use_dbus:

2077

# Emit D-Bus signal

2078

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2079

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()

2080

3079

2081

3080

tcp_server.enable()

2082

3081

tcp_server.server_activate()

2083

3082

2084

3083

# Find out what port we got

2085

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

3084

if zeroconf:

3085

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

2086

3086

if use_ipv6:

2087

3087

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

2088

" flowinfo %d, scope_id %d"

2089

% tcp_server.socket.getsockname())

3088

" flowinfo %d, scope_id %d",

3089

*tcp_server.socket.getsockname())

2090

3090

else: # IPv4

2091

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

2092

% tcp_server.socket.getsockname())

3091

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

3092

*tcp_server.socket.getsockname())

2093

3093

2094

3094

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

2095

3095

2096

3096

try:

2097

# From the Avahi example code

2098

try:

2099

service.activate()

2100

except dbus.exceptions.DBusException as error:

2101

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

2102

cleanup()

2103

sys.exit(1)

2104

# 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

2105

3106

2106

3107

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

2107

3108

lambda *args, **kwargs:

2111

3112

logger.debug("Starting main loop")

2112

3113

main_loop.run()

2113

3114

except AvahiError as error:

2114

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

3115

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

2115

3116

cleanup()

2116

3117

sys.exit(1)

2117

3118

except KeyboardInterrupt: