/mandos/release : revision 237.7.350

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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 errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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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 = "1.7.1"

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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"""

158

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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"""

180

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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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324

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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358

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"""

223

366

if self.group is not None:

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367

try:

225

368

self.group.Free()

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369

except (dbus.exceptions.UnknownMethodException,

227

dbus.exceptions.DBusException) as e:

370

dbus.exceptions.DBusException):

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371

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):

232

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

233

377

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

234

bad_states = { avahi.SERVER_INVALID:

235

"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" }

378

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",

382

avahi.SERVER_FAILURE: "Zeroconf server failure",

383

}

241

384

if state in bad_states:

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385

if bad_states[state] is not None:

243

386

if error is None:

246

389

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

247

390

self.cleanup()

248

391

elif state == avahi.SERVER_RUNNING:

249

self.add()

392

try:

393

self.add()

394

except dbus.exceptions.DBusException as error:

395

if (error.get_dbus_name()

396

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

397

logger.info("Local Zeroconf service name"

398

" collision.")

399

return self.rename(remove=False)

400

else:

401

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

402

self.cleanup()

403

os._exit(1)

250

404

else:

251

405

if error is None:

252

406

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

253

407

else:

254

408

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

409

255

410

def activate(self):

256

411

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

257

412

if self.server is None:

261

416

follow_name_owner_changes=True),

262

417

avahi.DBUS_INTERFACE_SERVER)

263

418

self.server.connect_to_signal("StateChanged",

264

self.server_state_changed)

419

self.server_state_changed)

265

420

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

266

421

267

422

268

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

423

class AvahiServiceToSyslog(AvahiService):

424

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

425

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

426

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

427

syslogger.setFormatter(logging.Formatter(

428

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

429

.format(self.name)))

430

return ret

431

432

# Pretend that we have a GnuTLS module

433

class GnuTLS(object):

434

"""This isn't so much a class as it is a module-like namespace.

435

It is instantiated once, and simulates having a GnuTLS module."""

436

437

_library = ctypes.cdll.LoadLibrary(

438

ctypes.util.find_library("gnutls"))

439

_need_version = "3.3.0"

440

def __init__(self):

441

# Need to use class name "GnuTLS" here, since this method is

442

# called before the assignment to the "gnutls" global variable

443

# happens.

444

if GnuTLS.check_version(self._need_version) is None:

445

raise GnuTLS.Error("Needs GnuTLS {} or later"

446

.format(self._need_version))

447

448

# Unless otherwise indicated, the constants and types below are

449

# all from the gnutls/gnutls.h C header file.

450

451

# Constants

452

E_SUCCESS = 0

453

E_INTERRUPTED = -52

454

E_AGAIN = -28

455

CRT_OPENPGP = 2

456

CLIENT = 2

457

SHUT_RDWR = 0

458

CRD_CERTIFICATE = 1

459

E_NO_CERTIFICATE_FOUND = -49

460

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

461

462

# Types

463

class session_int(ctypes.Structure):

464

_fields_ = []

465

session_t = ctypes.POINTER(session_int)

466

class certificate_credentials_st(ctypes.Structure):

467

_fields_ = []

468

certificate_credentials_t = ctypes.POINTER(

469

certificate_credentials_st)

470

certificate_type_t = ctypes.c_int

471

class datum_t(ctypes.Structure):

472

_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),

473

('size', ctypes.c_uint)]

474

class openpgp_crt_int(ctypes.Structure):

475

_fields_ = []

476

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

477

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

478

log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)

479

credentials_type_t = ctypes.c_int #

480

transport_ptr_t = ctypes.c_void_p

481

close_request_t = ctypes.c_int

482

483

# Exceptions

484

class Error(Exception):

485

# We need to use the class name "GnuTLS" here, since this

486

# exception might be raised from within GnuTLS.__init__,

487

# which is called before the assignment to the "gnutls"

488

# global variable has happened.

489

def __init__(self, message = None, code = None, args=()):

490

# Default usage is by a message string, but if a return

491

# code is passed, convert it to a string with

492

# gnutls.strerror()

493

self.code = code

494

if message is None and code is not None:

495

message = GnuTLS.strerror(code)

496

return super(GnuTLS.Error, self).__init__(

497

message, *args)

498

499

class CertificateSecurityError(Error):

500

pass

501

502

# Classes

503

class Credentials(object):

504

def __init__(self):

505

self._c_object = gnutls.certificate_credentials_t()

506

gnutls.certificate_allocate_credentials(

507

ctypes.byref(self._c_object))

508

self.type = gnutls.CRD_CERTIFICATE

509

510

def __del__(self):

511

gnutls.certificate_free_credentials(self._c_object)

512

513

class ClientSession(object):

514

def __init__(self, socket, credentials = None):

515

self._c_object = gnutls.session_t()

516

gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)

517

gnutls.set_default_priority(self._c_object)

518

gnutls.transport_set_ptr(self._c_object, socket.fileno())

519

gnutls.handshake_set_private_extensions(self._c_object,

520

True)

521

self.socket = socket

522

if credentials is None:

523

credentials = gnutls.Credentials()

524

gnutls.credentials_set(self._c_object, credentials.type,

525

ctypes.cast(credentials._c_object,

526

ctypes.c_void_p))

527

self.credentials = credentials

528

529

def __del__(self):

530

gnutls.deinit(self._c_object)

531

532

def handshake(self):

533

return gnutls.handshake(self._c_object)

534

535

def send(self, data):

536

data = bytes(data)

537

data_len = len(data)

538

while data_len > 0:

539

data_len -= gnutls.record_send(self._c_object,

540

data[-data_len:],

541

data_len)

542

543

def bye(self):

544

return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)

545

546

# Error handling functions

547

def _error_code(result):

548

"""A function to raise exceptions on errors, suitable

549

for the 'restype' attribute on ctypes functions"""

550

if result >= 0:

551

return result

552

if result == gnutls.E_NO_CERTIFICATE_FOUND:

553

raise gnutls.CertificateSecurityError(code = result)

554

raise gnutls.Error(code = result)

555

556

def _retry_on_error(result, func, arguments):

557

"""A function to retry on some errors, suitable

558

for the 'errcheck' attribute on ctypes functions"""

559

while result < 0:

560

if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):

561

return _error_code(result)

562

result = func(*arguments)

563

return result

564

565

# Unless otherwise indicated, the function declarations below are

566

# all from the gnutls/gnutls.h C header file.

567

568

# Functions

569

priority_set_direct = _library.gnutls_priority_set_direct

570

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

571

ctypes.POINTER(ctypes.c_char_p)]

572

priority_set_direct.restype = _error_code

573

574

init = _library.gnutls_init

575

init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]

576

init.restype = _error_code

577

578

set_default_priority = _library.gnutls_set_default_priority

579

set_default_priority.argtypes = [session_t]

580

set_default_priority.restype = _error_code

581

582

record_send = _library.gnutls_record_send

583

record_send.argtypes = [session_t, ctypes.c_void_p,

584

ctypes.c_size_t]

585

record_send.restype = ctypes.c_ssize_t

586

record_send.errcheck = _retry_on_error

587

588

certificate_allocate_credentials = (

589

_library.gnutls_certificate_allocate_credentials)

590

certificate_allocate_credentials.argtypes = [

591

ctypes.POINTER(certificate_credentials_t)]

592

certificate_allocate_credentials.restype = _error_code

593

594

certificate_free_credentials = (

595

_library.gnutls_certificate_free_credentials)

596

certificate_free_credentials.argtypes = [certificate_credentials_t]

597

certificate_free_credentials.restype = None

598

599

handshake_set_private_extensions = (

600

_library.gnutls_handshake_set_private_extensions)

601

handshake_set_private_extensions.argtypes = [session_t,

602

ctypes.c_int]

603

handshake_set_private_extensions.restype = None

604

605

credentials_set = _library.gnutls_credentials_set

606

credentials_set.argtypes = [session_t, credentials_type_t,

607

ctypes.c_void_p]

608

credentials_set.restype = _error_code

609

610

strerror = _library.gnutls_strerror

611

strerror.argtypes = [ctypes.c_int]

612

strerror.restype = ctypes.c_char_p

613

614

certificate_type_get = _library.gnutls_certificate_type_get

615

certificate_type_get.argtypes = [session_t]

616

certificate_type_get.restype = _error_code

617

618

certificate_get_peers = _library.gnutls_certificate_get_peers

619

certificate_get_peers.argtypes = [session_t,

620

ctypes.POINTER(ctypes.c_uint)]

621

certificate_get_peers.restype = ctypes.POINTER(datum_t)

622

623

global_set_log_level = _library.gnutls_global_set_log_level

624

global_set_log_level.argtypes = [ctypes.c_int]

625

global_set_log_level.restype = None

626

627

global_set_log_function = _library.gnutls_global_set_log_function

628

global_set_log_function.argtypes = [log_func]

629

global_set_log_function.restype = None

630

631

deinit = _library.gnutls_deinit

632

deinit.argtypes = [session_t]

633

deinit.restype = None

634

635

handshake = _library.gnutls_handshake

636

handshake.argtypes = [session_t]

637

handshake.restype = _error_code

638

handshake.errcheck = _retry_on_error

639

640

transport_set_ptr = _library.gnutls_transport_set_ptr

641

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

642

transport_set_ptr.restype = None

643

644

bye = _library.gnutls_bye

645

bye.argtypes = [session_t, close_request_t]

646

bye.restype = _error_code

647

bye.errcheck = _retry_on_error

648

649

check_version = _library.gnutls_check_version

650

check_version.argtypes = [ctypes.c_char_p]

651

check_version.restype = ctypes.c_char_p

652

653

# All the function declarations below are from gnutls/openpgp.h

654

655

openpgp_crt_init = _library.gnutls_openpgp_crt_init

656

openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]

657

openpgp_crt_init.restype = _error_code

658

659

openpgp_crt_import = _library.gnutls_openpgp_crt_import

660

openpgp_crt_import.argtypes = [openpgp_crt_t,

661

ctypes.POINTER(datum_t),

662

openpgp_crt_fmt_t]

663

openpgp_crt_import.restype = _error_code

664

665

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

666

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

667

ctypes.POINTER(ctypes.c_uint)]

668

openpgp_crt_verify_self.restype = _error_code

669

670

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

671

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

672

openpgp_crt_deinit.restype = None

673

674

openpgp_crt_get_fingerprint = (

675

_library.gnutls_openpgp_crt_get_fingerprint)

676

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

677

ctypes.c_void_p,

678

ctypes.POINTER(

679

ctypes.c_size_t)]

680

openpgp_crt_get_fingerprint.restype = _error_code

681

682

# Remove non-public functions

683

del _error_code, _retry_on_error

684

# Create the global "gnutls" object, simulating a module

685

gnutls = GnuTLS()

686

687

def call_pipe(connection, # : multiprocessing.Connection

688

func, *args, **kwargs):

689

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

690

691

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

692

return value on the provided multiprocessing.Connection.

693

"""

694

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

695

connection.close()

696

274

697

class Client(object):

275

698

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

276

699

277

700

Attributes:

278

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

701

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

279

702

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

280

703

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

281

704

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

288

711

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

289

712

checker_initiator_tag: a gobject event source tag, or None

290

713

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

714

client_structure: Object describing what attributes a client has

715

and is used for storing the client at exit

291

716

current_checker_command: string; current running checker_command

292

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

293

717

disable_initiator_tag: a gobject event source tag, or None

294

718

enabled: bool()

295

719

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

298

722

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

299

723

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

300

724

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

301

last_enabled: datetime.datetime(); (UTC)

725

last_checker_status: integer between 0 and 255 reflecting exit

726

status of last checker. -1 reflects crashed

727

checker, -2 means no checker completed yet.

728

last_checker_signal: The signal which killed the last checker, if

729

last_checker_status is -1

730

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

302

731

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

303

732

D-Bus identifiers

304

733

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

305

734

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

306

735

until this client is disabled

307

extended_timeout: extra long timeout when password has been sent

736

extended_timeout: extra long timeout when secret has been sent

308

737

runtime_expansions: Allowed attributes for runtime expansion.

309

738

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

310

739

disabled, or None

740

server_settings: The server_settings dict from main()

311

741

"""

312

742

313

743

runtime_expansions = ("approval_delay", "approval_duration",

314

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

315

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

744

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

745

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

746

"last_approval_request", "last_checked_ok",

316

747

"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."""

748

client_defaults = {

749

"timeout": "PT5M",

750

"extended_timeout": "PT15M",

751

"interval": "PT2M",

752

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

753

"host": "",

754

"approval_delay": "PT0S",

755

"approval_duration": "PT1S",

756

"approved_by_default": "True",

757

"enabled": "True",

758

}

759

760

@staticmethod

761

def config_parser(config):

762

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

763

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

764

with exceptions for any special settings as defined above.

765

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

766

value given the same arguments.

767

"""

768

settings = {}

769

for client_name in config.sections():

770

section = dict(config.items(client_name))

771

client = settings[client_name] = {}

772

773

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

774

# Reformat values from string types to Python types

775

client["approved_by_default"] = config.getboolean(

776

client_name, "approved_by_default")

777

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

778

"enabled")

779

780

# Uppercase and remove spaces from fingerprint for later

781

# comparison purposes with return value from the

782

# fingerprint() function

783

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

784

.replace(" ", ""))

785

if "secret" in section:

786

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

787

elif "secfile" in section:

788

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

789

(section["secfile"])),

790

"rb") as secfile:

791

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

792

else:

793

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

794

.format(section))

795

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

796

client["extended_timeout"] = string_to_delta(

797

section["extended_timeout"])

798

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

799

client["approval_delay"] = string_to_delta(

800

section["approval_delay"])

801

client["approval_duration"] = string_to_delta(

802

section["approval_duration"])

803

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

804

client["last_approval_request"] = None

805

client["last_checked_ok"] = None

806

client["last_checker_status"] = -2

807

808

return settings

809

810

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

337

811

self.name = name

338

if config is None:

339

config = {}

812

if server_settings is None:

813

server_settings = {}

814

self.server_settings = server_settings

815

# adding all client settings

816

for setting, value in settings.items():

817

setattr(self, setting, value)

818

819

if self.enabled:

820

if not hasattr(self, "last_enabled"):

821

self.last_enabled = datetime.datetime.utcnow()

822

if not hasattr(self, "expires"):

823

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

824

+ self.timeout)

825

else:

826

self.last_enabled = None

827

self.expires = None

828

340

829

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

830

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

831

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

832

datetime.datetime.utcnow())

833

834

# attributes specific for this server instance

367

835

self.checker = None

368

836

self.checker_initiator_tag = None

369

837

self.disable_initiator_tag = None

370

self.expires = None

371

838

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

373

839

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)

840

self.approved = None

378

841

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())

842

self.changedstate = multiprocessing_manager.Condition(

843

multiprocessing_manager.Lock())

844

self.client_structure = [attr

845

for attr in self.__dict__.iterkeys()

846

if not attr.startswith("_")]

847

self.client_structure.append("client_structure")

848

849

for name, t in inspect.getmembers(

850

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

851

if not name.startswith("_"):

852

self.client_structure.append(name)

384

853

854

# Send notice to process children that client state has changed

385

855

def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

856

with self.changedstate:

857

self.changedstate.notify_all()

858

390

859

def enable(self):

391

860

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

392

861

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

393

862

# Already enabled

394

863

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

864

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

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

406

865

self.enabled = True

407

866

self.last_enabled = datetime.datetime.utcnow()

408

# Also start a new checker *right now*.

409

self.start_checker()

867

self.init_checker()

868

self.send_changedstate()

410

869

411

870

def disable(self, quiet=True):

412

871

"""Disable this client."""

413

872

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

414

873

return False

415

874

if not quiet:

416

self.send_changedstate()

417

if not quiet:

418

875

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

419

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

876

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

420

877

gobject.source_remove(self.disable_initiator_tag)

421

878

self.disable_initiator_tag = None

422

879

self.expires = None

423

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

880

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

424

881

gobject.source_remove(self.checker_initiator_tag)

425

882

self.checker_initiator_tag = None

426

883

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

884

self.enabled = False

885

if not quiet:

886

self.send_changedstate()

430

887

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

431

888

return False

432

889

433

890

def __del__(self):

434

self.disable_hook = None

435

891

self.disable()

436

892

437

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

893

def init_checker(self):

894

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

895

# and every interval from then on.

896

if self.checker_initiator_tag is not None:

897

gobject.source_remove(self.checker_initiator_tag)

898

self.checker_initiator_tag = gobject.timeout_add(

899

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

900

self.start_checker)

901

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

902

if self.disable_initiator_tag is not None:

903

gobject.source_remove(self.disable_initiator_tag)

904

self.disable_initiator_tag = gobject.timeout_add(

905

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

906

# Also start a new checker *right now*.

907

self.start_checker()

908

909

def checker_callback(self, source, condition, connection,

910

command):

438

911

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

439

912

self.checker_callback_tag = None

440

913

self.checker = None

441

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

914

# Read return code from connection (see call_pipe)

915

returncode = connection.recv()

916

connection.close()

917

918

if returncode >= 0:

919

self.last_checker_status = returncode

920

self.last_checker_signal = None

921

if self.last_checker_status == 0:

444

922

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

445

923

vars(self))

446

924

self.checked_ok()

447

925

else:

448

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

449

vars(self))

926

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

450

927

else:

928

self.last_checker_status = -1

929

self.last_checker_signal = -returncode

451

930

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

452

931

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

"""

932

return False

933

934

def checked_ok(self):

935

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

936

self.last_checked_ok = datetime.datetime.utcnow()

937

self.last_checker_status = 0

938

self.last_checker_signal = None

939

self.bump_timeout()

940

941

def bump_timeout(self, timeout=None):

942

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

460

943

if timeout is None:

461

944

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))

945

if self.disable_initiator_tag is not None:

946

gobject.source_remove(self.disable_initiator_tag)

947

self.disable_initiator_tag = None

948

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

949

self.disable_initiator_tag = gobject.timeout_add(

950

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

951

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

468

952

469

953

def need_approval(self):

470

954

self.last_approval_request = datetime.datetime.utcnow()

475

959

If a checker already exists, leave it running and do

476

960

nothing."""

477

961

# 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

962

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

963

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

964

# would inevitably timeout, since no checker would get a

965

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

482

966

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

483

967

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

484

968

# should be.

485

969

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)

970

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

971

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

972

self.checker.join()

973

self.checker = None

499

974

# Start a new checker if needed

500

975

if self.checker is None:

976

# Escape attributes for the shell

977

escaped_attrs = {

978

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

979

for attr in self.runtime_expansions }

501

980

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

981

command = self.checker_command % escaped_attrs

982

except TypeError as error:

983

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

984

self.checker_command,

985

exc_info=error)

986

return True # Try again later

520

987

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)

988

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

989

self.name)

990

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

991

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

992

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

993

# always replaced by /dev/null.)

994

# The exception is when not debugging but nevertheless

995

# running in the foreground; use the previously

996

# created wnull.

997

popen_args = { "close_fds": True,

998

"shell": True,

999

"cwd": "/" }

1000

if (not self.server_settings["debug"]

1001

and self.server_settings["foreground"]):

1002

popen_args.update({"stdout": wnull,

1003

"stderr": wnull })

1004

pipe = multiprocessing.Pipe(duplex = False)

1005

self.checker = multiprocessing.Process(

1006

target = call_pipe,

1007

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

1008

kwargs = popen_args)

1009

self.checker.start()

1010

self.checker_callback_tag = gobject.io_add_watch(

1011

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

1012

self.checker_callback, pipe[0], command)

544

1013

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

545

1014

return True

546

1015

552

1021

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

553

1022

return

554

1023

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

1024

self.checker.terminate()

563

1025

self.checker = None

564

1026

565

1027

566

def dbus_service_property(dbus_interface, signature="v",

567

access="readwrite", byte_arrays=False):

1028

def dbus_service_property(dbus_interface,

1029

signature="v",

1030

access="readwrite",

1031

byte_arrays=False):

568

1032

"""Decorators for marking methods of a DBusObjectWithProperties to

569

1033

become properties on the D-Bus.

570

1034

579

1043

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

580

1044

if byte_arrays and signature != "ay":

581

1045

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

582

" signature %r" % signature)

1046

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

1047

583

1048

def decorator(func):

584

1049

func._dbus_is_property = True

585

1050

func._dbus_interface = dbus_interface

590

1055

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

591

1056

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

592

1057

return func

1058

1059

return decorator

1060

1061

1062

def dbus_interface_annotations(dbus_interface):

1063

"""Decorator for marking functions returning interface annotations

1064

1065

Usage:

1066

1067

@dbus_interface_annotations("org.example.Interface")

1068

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

1069

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

1070

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

1071

"false"}

1072

"""

1073

1074

def decorator(func):

1075

func._dbus_is_interface = True

1076

func._dbus_interface = dbus_interface

1077

func._dbus_name = dbus_interface

1078

return func

1079

1080

return decorator

1081

1082

1083

def dbus_annotations(annotations):

1084

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

1085

Usage:

1086

1087

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

1088

"org.freedesktop.DBus.Property."

1089

"EmitsChangedSignal": "false"})

1090

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

1091

access="r")

1092

def Property_dbus_property(self):

1093

return dbus.Boolean(False)

1094

1095

See also the DBusObjectWithAnnotations class.

1096

"""

1097

1098

def decorator(func):

1099

func._dbus_annotations = annotations

1100

return func

1101

593

1102

return decorator

594

1103

595

1104

596

1105

class DBusPropertyException(dbus.exceptions.DBusException):

597

1106

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

598

1107

"""

599

def __unicode__(self):

600

return unicode(str(self))

1108

pass

601

1109

602

1110

603

1111

class DBusPropertyAccessException(DBusPropertyException):

612

1120

pass

613

1121

614

1122

615

class DBusObjectWithProperties(dbus.service.Object):

1123

class DBusObjectWithAnnotations(dbus.service.Object):

1124

"""A D-Bus object with annotations.

1125

1126

Classes inheriting from this can use the dbus_annotations

1127

decorator to add annotations to methods or signals.

1128

"""

1129

1130

@staticmethod

1131

def _is_dbus_thing(thing):

1132

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

1133

1134

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

1135

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

1136

"""

1137

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

1138

False)

1139

1140

def _get_all_dbus_things(self, thing):

1141

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

1142

"""

1143

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

1144

athing.__get__(self))

1145

for cls in self.__class__.__mro__

1146

for name, athing in

1147

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

1148

1149

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1150

out_signature = "s",

1151

path_keyword = 'object_path',

1152

connection_keyword = 'connection')

1153

def Introspect(self, object_path, connection):

1154

"""Overloading of standard D-Bus method.

1155

1156

Inserts annotation tags on methods and signals.

1157

"""

1158

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

1159

connection)

1160

try:

1161

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

1162

1163

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

1164

# Add annotation tags

1165

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

1166

for tag in if_tag.getElementsByTagName(typ):

1167

annots = dict()

1168

for name, prop in (self.

1169

_get_all_dbus_things(typ)):

1170

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

1171

and prop._dbus_interface

1172

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

1173

annots.update(getattr(

1174

prop, "_dbus_annotations", {}))

1175

for name, value in annots.items():

1176

ann_tag = document.createElement(

1177

"annotation")

1178

ann_tag.setAttribute("name", name)

1179

ann_tag.setAttribute("value", value)

1180

tag.appendChild(ann_tag)

1181

# Add interface annotation tags

1182

for annotation, value in dict(

1183

itertools.chain.from_iterable(

1184

annotations().items()

1185

for name, annotations

1186

in self._get_all_dbus_things("interface")

1187

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

1188

)).items():

1189

ann_tag = document.createElement("annotation")

1190

ann_tag.setAttribute("name", annotation)

1191

ann_tag.setAttribute("value", value)

1192

if_tag.appendChild(ann_tag)

1193

# Fix argument name for the Introspect method itself

1194

if (if_tag.getAttribute("name")

1195

== dbus.INTROSPECTABLE_IFACE):

1196

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

1197

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

1198

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

1199

if (arg.getAttribute("direction")

1200

== "out"):

1201

arg.setAttribute("name",

1202

"xml_data")

1203

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

1204

document.unlink()

1205

except (AttributeError, xml.dom.DOMException,

1206

xml.parsers.expat.ExpatError) as error:

1207

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

1208

exc_info=error)

1209

return xmlstring

1210

1211

1212

class DBusObjectWithProperties(DBusObjectWithAnnotations):

616

1213

"""A D-Bus object with properties.

617

1214

618

1215

Classes inheriting from this can use the dbus_service_property

620

1217

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

621

1218

"""

622

1219

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

1220

def _get_dbus_property(self, interface_name, property_name):

635

1221

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

636

1222

property with the specified name and interface.

637

1223

"""

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:

1224

for cls in self.__class__.__mro__:

1225

for name, value in inspect.getmembers(

1226

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

1227

if (value._dbus_name == property_name

1228

and value._dbus_interface == interface_name):

641

1229

return value.__get__(self)

642

1230

643

1231

# No such property

644

raise DBusPropertyNotFound(self.dbus_object_path + ":"

645

+ interface_name + "."

646

+ property_name)

647

648

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

1232

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

1233

self.dbus_object_path, interface_name, property_name))

1234

1235

@classmethod

1236

def _get_all_interface_names(cls):

1237

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

1238

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

1239

"_dbus_interface", None)

1240

for x in (inspect.getmro(cls))

1241

for attr in dir(x))

1242

if name is not None)

1243

1244

@dbus.service.method(dbus.PROPERTIES_IFACE,

1245

in_signature="ss",

649

1246

out_signature="v")

650

1247

def Get(self, interface_name, property_name):

651

1248

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

669

1266

# The byte_arrays option is not supported yet on

670

1267

# signatures other than "ay".

671

1268

if prop._dbus_signature != "ay":

672

raise ValueError

673

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

674

for byte in value))

1269

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

1270

"'ay' signature {!r}"

1271

.format(prop._dbus_signature))

1272

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

1273

for byte in value))

675

1274

prop(value)

676

1275

677

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

1276

@dbus.service.method(dbus.PROPERTIES_IFACE,

1277

in_signature="s",

678

1278

out_signature="a{sv}")

679

1279

def GetAll(self, interface_name):

680

1280

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

682

1282

683

1283

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

684

1284

"""

685

all = {}

686

for name, prop in self._get_all_dbus_properties():

1285

properties = {}

1286

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

687

1287

if (interface_name

688

1288

and interface_name != prop._dbus_interface):

689

1289

# Interface non-empty but did not match

693

1293

continue

694

1294

value = prop()

695

1295

if not hasattr(value, "variant_level"):

696

all[name] = value

1296

properties[name] = value

697

1297

continue

698

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

699

value.variant_level+1)

700

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

1298

properties[name] = type(value)(

1299

value, variant_level = value.variant_level + 1)

1300

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

1301

1302

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

1303

def PropertiesChanged(self, interface_name, changed_properties,

1304

invalidated_properties):

1305

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

1306

standard.

1307

"""

1308

pass

701

1309

702

1310

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

703

1311

out_signature="s",

704

1312

path_keyword='object_path',

705

1313

connection_keyword='connection')

706

1314

def Introspect(self, object_path, connection):

707

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

1315

"""Overloading of standard D-Bus method.

1316

1317

Inserts property tags and interface annotation tags.

708

1318

"""

709

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

710

connection)

1319

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1320

object_path,

1321

connection)

711

1322

try:

712

1323

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

1324

713

1325

def make_tag(document, name, prop):

714

1326

e = document.createElement("property")

715

1327

e.setAttribute("name", name)

716

1328

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

717

1329

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

718

1330

return e

1331

719

1332

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

1333

# Add property tags

720

1334

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

721

1335

for name, prop

722

in self._get_all_dbus_properties()

1336

in self._get_all_dbus_things("property")

723

1337

if prop._dbus_interface

724

1338

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

725

1339

if_tag.appendChild(tag)

1340

# Add annotation tags for properties

1341

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

1342

annots = dict()

1343

for name, prop in self._get_all_dbus_things(

1344

"property"):

1345

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

1346

and prop._dbus_interface

1347

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

1348

annots.update(getattr(

1349

prop, "_dbus_annotations", {}))

1350

for name, value in annots.items():

1351

ann_tag = document.createElement(

1352

"annotation")

1353

ann_tag.setAttribute("name", name)

1354

ann_tag.setAttribute("value", value)

1355

tag.appendChild(ann_tag)

726

1356

# Add the names to the return values for the

727

1357

# "org.freedesktop.DBus.Properties" methods

728

1358

if (if_tag.getAttribute("name")

743

1373

except (AttributeError, xml.dom.DOMException,

744

1374

xml.parsers.expat.ExpatError) as error:

745

1375

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

746

error)

747

return xmlstring

748

749

750

def datetime_to_dbus (dt, variant_level=0):

1376

exc_info=error)

1377

return xmlstring

1378

1379

try:

1380

dbus.OBJECT_MANAGER_IFACE

1381

except AttributeError:

1382

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

1383

1384

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1385

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

1386

1387

Classes inheriting from this exposes the standard

1388

GetManagedObjects call and the InterfacesAdded and

1389

InterfacesRemoved signals on the standard

1390

"org.freedesktop.DBus.ObjectManager" interface.

1391

1392

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

1393

manually.

1394

"""

1395

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1396

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

1397

def GetManagedObjects(self):

1398

"""This function must be overridden"""

1399

raise NotImplementedError()

1400

1401

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1402

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

1403

def InterfacesAdded(self, object_path, interfaces_and_properties):

1404

pass

1405

1406

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

1407

def InterfacesRemoved(self, object_path, interfaces):

1408

pass

1409

1410

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1411

out_signature = "s",

1412

path_keyword = 'object_path',

1413

connection_keyword = 'connection')

1414

def Introspect(self, object_path, connection):

1415

"""Overloading of standard D-Bus method.

1416

1417

Override return argument name of GetManagedObjects to be

1418

"objpath_interfaces_and_properties"

1419

"""

1420

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1421

object_path,

1422

connection)

1423

try:

1424

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

1425

1426

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

1427

# Fix argument name for the GetManagedObjects method

1428

if (if_tag.getAttribute("name")

1429

== dbus.OBJECT_MANAGER_IFACE):

1430

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

1431

if (cn.getAttribute("name")

1432

== "GetManagedObjects"):

1433

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

1434

if (arg.getAttribute("direction")

1435

== "out"):

1436

arg.setAttribute(

1437

"name",

1438

"objpath_interfaces"

1439

"_and_properties")

1440

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

1441

document.unlink()

1442

except (AttributeError, xml.dom.DOMException,

1443

xml.parsers.expat.ExpatError) as error:

1444

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

1445

exc_info = error)

1446

return xmlstring

1447

1448

def datetime_to_dbus(dt, variant_level=0):

751

1449

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

752

1450

if dt is None:

753

1451

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

754

return dbus.String(dt.isoformat(),

755

variant_level=variant_level)

756

757

class transitional_dbus_metaclass(DBusObjectWithProperties.__metaclass__):

758

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

759

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

760

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

761

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

762

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

763

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

764

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

765

newfunc = types.FunctionType(unwrappedfunc.func_code,

766

unwrappedfunc.func_globals,

767

unwrappedfunc.func_name,

768

unwrappedfunc.func_defaults,

769

unwrappedfunc.func_closure)

770

new_dbusfunc = dbus.service.signal(

771

new_interface, old_dbusobj._dbus_signature)(newfunc)

772

attr["_transitional_" + attrname] = new_dbusfunc

773

774

def fixscope(func1, func2):

775

def newcall(*args, **kwargs):

776

func1(*args, **kwargs)

777

func2(*args, **kwargs)

778

return newcall

779

780

attr[attrname] = fixscope(old_dbusobj, new_dbusfunc)

781

782

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

783

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

784

new_dbusfunc = (dbus.service.method

785

(new_interface,

786

old_dbusobj._dbus_in_signature,

787

old_dbusobj._dbus_out_signature)

788

(types.FunctionType

789

(old_dbusobj.func_code,

790

old_dbusobj.func_globals,

791

old_dbusobj.func_name,

792

old_dbusobj.func_defaults,

793

old_dbusobj.func_closure)))

794

795

attr[attrname] = new_dbusfunc

796

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

797

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

798

new_dbusfunc = (dbus_service_property

799

(new_interface,

800

old_dbusobj._dbus_signature,

801

old_dbusobj._dbus_access,

802

old_dbusobj._dbus_get_args_options["byte_arrays"])

803

(types.FunctionType

804

(old_dbusobj.func_code,

805

old_dbusobj.func_globals,

806

old_dbusobj.func_name,

807

old_dbusobj.func_defaults,

808

old_dbusobj.func_closure)))

809

810

attr[attrname] = new_dbusfunc

811

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

812

1452

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

1453

1454

1455

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1456

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

1457

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

1458

interface names according to the "alt_interface_names" mapping.

1459

Usage:

1460

1461

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

1462

"net.example.AlternateInterface"})

1463

class SampleDBusObject(dbus.service.Object):

1464

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

1465

def SampleDBusMethod():

1466

pass

1467

1468

The above "SampleDBusMethod" on "SampleDBusObject" will be

1469

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

1470

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

1471

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

1472

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

1473

1474

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

1475

(from DBusObjectWithProperties) and interfaces (from the

1476

dbus_interface_annotations decorator).

1477

"""

1478

1479

def wrapper(cls):

1480

for orig_interface_name, alt_interface_name in (

1481

alt_interface_names.items()):

1482

attr = {}

1483

interface_names = set()

1484

# Go though all attributes of the class

1485

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

1486

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

1487

# with the wrong interface name

1488

if (not hasattr(attribute, "_dbus_interface")

1489

or not attribute._dbus_interface.startswith(

1490

orig_interface_name)):

1491

continue

1492

# Create an alternate D-Bus interface name based on

1493

# the current name

1494

alt_interface = attribute._dbus_interface.replace(

1495

orig_interface_name, alt_interface_name)

1496

interface_names.add(alt_interface)

1497

# Is this a D-Bus signal?

1498

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

1499

if sys.version_info.major == 2:

1500

# Extract the original non-method undecorated

1501

# function by black magic

1502

nonmethod_func = (dict(

1503

zip(attribute.func_code.co_freevars,

1504

attribute.__closure__))

1505

["func"].cell_contents)

1506

else:

1507

nonmethod_func = attribute

1508

# Create a new, but exactly alike, function

1509

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

1510

# with the alternate D-Bus interface name

1511

if sys.version_info.major == 2:

1512

new_function = types.FunctionType(

1513

nonmethod_func.func_code,

1514

nonmethod_func.func_globals,

1515

nonmethod_func.func_name,

1516

nonmethod_func.func_defaults,

1517

nonmethod_func.func_closure)

1518

else:

1519

new_function = types.FunctionType(

1520

nonmethod_func.__code__,

1521

nonmethod_func.__globals__,

1522

nonmethod_func.__name__,

1523

nonmethod_func.__defaults__,

1524

nonmethod_func.__closure__)

1525

new_function = (dbus.service.signal(

1526

alt_interface,

1527

attribute._dbus_signature)(new_function))

1528

# Copy annotations, if any

1529

try:

1530

new_function._dbus_annotations = dict(

1531

attribute._dbus_annotations)

1532

except AttributeError:

1533

pass

1534

# Define a creator of a function to call both the

1535

# original and alternate functions, so both the

1536

# original and alternate signals gets sent when

1537

# the function is called

1538

def fixscope(func1, func2):

1539

"""This function is a scope container to pass

1540

func1 and func2 to the "call_both" function

1541

outside of its arguments"""

1542

1543

@functools.wraps(func2)

1544

def call_both(*args, **kwargs):

1545

"""This function will emit two D-Bus

1546

signals by calling func1 and func2"""

1547

func1(*args, **kwargs)

1548

func2(*args, **kwargs)

1549

# Make wrapper function look like a D-Bus signal

1550

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

1551

if name.startswith("_dbus_"):

1552

setattr(call_both, name, attr)

1553

1554

return call_both

1555

# Create the "call_both" function and add it to

1556

# the class

1557

attr[attrname] = fixscope(attribute, new_function)

1558

# Is this a D-Bus method?

1559

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

1560

# Create a new, but exactly alike, function

1561

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

1562

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

1563

# to the class.

1564

attr[attrname] = (

1565

dbus.service.method(

1566

alt_interface,

1567

attribute._dbus_in_signature,

1568

attribute._dbus_out_signature)

1569

(types.FunctionType(attribute.func_code,

1570

attribute.func_globals,

1571

attribute.func_name,

1572

attribute.func_defaults,

1573

attribute.func_closure)))

1574

# Copy annotations, if any

1575

try:

1576

attr[attrname]._dbus_annotations = dict(

1577

attribute._dbus_annotations)

1578

except AttributeError:

1579

pass

1580

# Is this a D-Bus property?

1581

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

1582

# Create a new, but exactly alike, function

1583

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

1584

# property with the alternate D-Bus interface

1585

# name. Add it to the class.

1586

attr[attrname] = (dbus_service_property(

1587

alt_interface, attribute._dbus_signature,

1588

attribute._dbus_access,

1589

attribute._dbus_get_args_options

1590

["byte_arrays"])

1591

(types.FunctionType(

1592

attribute.func_code,

1593

attribute.func_globals,

1594

attribute.func_name,

1595

attribute.func_defaults,

1596

attribute.func_closure)))

1597

# Copy annotations, if any

1598

try:

1599

attr[attrname]._dbus_annotations = dict(

1600

attribute._dbus_annotations)

1601

except AttributeError:

1602

pass

1603

# Is this a D-Bus interface?

1604

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

1605

# Create a new, but exactly alike, function

1606

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

1607

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

1608

# to the class.

1609

attr[attrname] = (

1610

dbus_interface_annotations(alt_interface)

1611

(types.FunctionType(attribute.func_code,

1612

attribute.func_globals,

1613

attribute.func_name,

1614

attribute.func_defaults,

1615

attribute.func_closure)))

1616

if deprecate:

1617

# Deprecate all alternate interfaces

1618

iname="_AlternateDBusNames_interface_annotation{}"

1619

for interface_name in interface_names:

1620

1621

@dbus_interface_annotations(interface_name)

1622

def func(self):

1623

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

1624

"true" }

1625

# Find an unused name

1626

for aname in (iname.format(i)

1627

for i in itertools.count()):

1628

if aname not in attr:

1629

attr[aname] = func

1630

break

1631

if interface_names:

1632

# Replace the class with a new subclass of it with

1633

# methods, signals, etc. as created above.

1634

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

1635

(cls, ), attr)

1636

return cls

1637

1638

return wrapper

1639

1640

1641

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

1642

"se.bsnet.fukt.Mandos"})

813

1643

class ClientDBus(Client, DBusObjectWithProperties):

814

1644

"""A Client class using D-Bus

815

1645

819

1649

"""

820

1650

821

1651

runtime_expansions = (Client.runtime_expansions

822

+ ("dbus_object_path",))

1652

+ ("dbus_object_path", ))

1653

1654

_interface = "se.recompile.Mandos.Client"

823

1655

824

1656

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

825

1657

826

1658

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

827

self._approvals_pending = 0

828

1659

self.bus = bus

829

1660

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

830

1661

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

831

1662

# the D-Bus

832

client_object_name = unicode(self.name).translate(

1663

client_object_name = str(self.name).translate(

833

1664

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

834

1665

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

835

self.dbus_object_path = (dbus.ObjectPath

836

("/clients/" + client_object_name))

1666

self.dbus_object_path = dbus.ObjectPath(

1667

"/clients/" + client_object_name)

837

1668

DBusObjectWithProperties.__init__(self, self.bus,

838

1669

self.dbus_object_path)

1670

1671

def notifychangeproperty(transform_func, dbus_name,

1672

type_func=lambda x: x,

1673

variant_level=1,

1674

invalidate_only=False,

1675

_interface=_interface):

1676

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

1677

its changes to DBus.

839

1678

840

def notifychangeproperty(transform_func,

841

dbus_name, type_func=lambda x: x,

842

variant_level=1):

843

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

844

changes to DBus.

845

transform_fun: Function that takes a value and transform it to

846

DBus type.

847

dbus_name: DBus name of the variable

1679

transform_fun: Function that takes a value and a variant_level

1680

and transforms it to a D-Bus type.

1681

dbus_name: D-Bus name of the variable

848

1682

type_func: Function that transform the value before sending it

849

to DBus

850

variant_level: DBus variant level. default: 1

1683

to the D-Bus. Default: no transform

1684

variant_level: D-Bus variant level. Default: 1

851

1685

"""

852

real_value = [None,]

1686

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

1687

853

1688

def setter(self, value):

854

old_value = real_value[0]

855

real_value[0] = value

856

1689

if hasattr(self, "dbus_object_path"):

857

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

858

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

859

variant_level)

860

self.PropertyChanged(dbus.String(dbus_name),

861

dbus_value)

1690

if (not hasattr(self, attrname) or

1691

type_func(getattr(self, attrname, None))

1692

!= type_func(value)):

1693

if invalidate_only:

1694

self.PropertiesChanged(

1695

_interface, dbus.Dictionary(),

1696

dbus.Array((dbus_name, )))

1697

else:

1698

dbus_value = transform_func(

1699

type_func(value),

1700

variant_level = variant_level)

1701

self.PropertyChanged(dbus.String(dbus_name),

1702

dbus_value)

1703

self.PropertiesChanged(

1704

_interface,

1705

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

1706

dbus_value }),

1707

dbus.Array())

1708

setattr(self, attrname, value)

862

1709

863

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

864

1710

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

865

1711

866

1712

expires = notifychangeproperty(datetime_to_dbus, "Expires")

867

1713

approvals_pending = notifychangeproperty(dbus.Boolean,

870

1716

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

871

1717

last_enabled = notifychangeproperty(datetime_to_dbus,

872

1718

"LastEnabled")

873

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

874

type_func = lambda checker: checker is not None)

1719

checker = notifychangeproperty(

1720

dbus.Boolean, "CheckerRunning",

1721

type_func = lambda checker: checker is not None)

875

1722

last_checked_ok = notifychangeproperty(datetime_to_dbus,

876

1723

"LastCheckedOK")

877

last_approval_request = notifychangeproperty(datetime_to_dbus,

878

"LastApprovalRequest")

1724

last_checker_status = notifychangeproperty(dbus.Int16,

1725

"LastCheckerStatus")

1726

last_approval_request = notifychangeproperty(

1727

datetime_to_dbus, "LastApprovalRequest")

879

1728

approved_by_default = notifychangeproperty(dbus.Boolean,

880

1729

"ApprovedByDefault")

881

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

882

type_func = _timedelta_to_milliseconds)

883

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

884

type_func = _timedelta_to_milliseconds)

1730

approval_delay = notifychangeproperty(

1731

dbus.UInt64, "ApprovalDelay",

1732

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

1733

approval_duration = notifychangeproperty(

1734

dbus.UInt64, "ApprovalDuration",

1735

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

885

1736

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

886

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

887

type_func = _timedelta_to_milliseconds)

888

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

889

type_func = _timedelta_to_milliseconds)

890

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

891

type_func = _timedelta_to_milliseconds)

1737

timeout = notifychangeproperty(

1738

dbus.UInt64, "Timeout",

1739

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

1740

extended_timeout = notifychangeproperty(

1741

dbus.UInt64, "ExtendedTimeout",

1742

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

1743

interval = notifychangeproperty(

1744

dbus.UInt64, "Interval",

1745

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

892

1746

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

1747

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

1748

invalidate_only=True)

893

1749

894

1750

del notifychangeproperty

895

1751

902

1758

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

903

1759

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

904

1760

905

def checker_callback(self, pid, condition, command,

906

*args, **kwargs):

907

self.checker_callback_tag = None

908

self.checker = None

909

if os.WIFEXITED(condition):

910

exitstatus = os.WEXITSTATUS(condition)

1761

def checker_callback(self, source, condition,

1762

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

1763

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

1764

connection, command, *args,

1765

**kwargs)

1766

exitstatus = self.last_checker_status

1767

if exitstatus >= 0:

911

1768

# Emit D-Bus signal

912

1769

self.CheckerCompleted(dbus.Int16(exitstatus),

913

dbus.Int64(condition),

1770

# This is specific to GNU libC

1771

dbus.Int64(exitstatus << 8),

914

1772

dbus.String(command))

915

1773

else:

916

1774

# Emit D-Bus signal

917

1775

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

918

dbus.Int64(condition),

1776

dbus.Int64(

1777

# This is specific to GNU libC

1778

(exitstatus << 8)

1779

| self.last_checker_signal),

919

1780

dbus.String(command))

920

921

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

922

*args, **kwargs)

1781

return ret

923

1782

924

1783

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

925

old_checker = self.checker

926

if self.checker is not None:

927

old_checker_pid = self.checker.pid

928

else:

929

old_checker_pid = None

1784

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

930

1785

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

931

1786

# Only if new checker process was started

932

1787

if (self.checker is not None

936

1791

return r

937

1792

938

1793

def _reset_approved(self):

939

self._approved = None

1794

self.approved = None

940

1795

return False

941

1796

942

1797

def approve(self, value=True):

1798

self.approved = value

1799

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

1800

* 1000), self._reset_approved)

943

1801

self.send_changedstate()

944

self._approved = value

945

gobject.timeout_add(_timedelta_to_milliseconds

946

(self.approval_duration),

947

self._reset_approved)

948

949

1802

950

1803

## D-Bus methods, signals & properties

951

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

1804

1805

## Interfaces

952

1806

953

1807

## Signals

954

1808

965

1819

pass

966

1820

967

1821

# PropertyChanged - signal

1822

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

968

1823

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

969

1824

def PropertyChanged(self, property, value):

970

1825

"D-Bus signal"

1004

1859

self.checked_ok()

1005

1860

1006

1861

# Enable - method

1862

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

1007

1863

@dbus.service.method(_interface)

1008

1864

def Enable(self):

1009

1865

"D-Bus method"

1010

1866

self.enable()

1011

1867

1012

1868

# StartChecker - method

1869

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

1013

1870

@dbus.service.method(_interface)

1014

1871

def StartChecker(self):

1015

1872

"D-Bus method"

1016

1873

self.start_checker()

1017

1874

1018

1875

# Disable - method

1876

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

1019

1877

@dbus.service.method(_interface)

1020

1878

def Disable(self):

1021

1879

"D-Bus method"

1022

1880

self.disable()

1023

1881

1024

1882

# StopChecker - method

1883

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

1025

1884

@dbus.service.method(_interface)

1026

1885

def StopChecker(self):

1027

1886

self.stop_checker()

1034

1893

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

1035

1894

1036

1895

# ApprovedByDefault - property

1037

@dbus_service_property(_interface, signature="b",

1896

@dbus_service_property(_interface,

1897

signature="b",

1038

1898

access="readwrite")

1039

1899

def ApprovedByDefault_dbus_property(self, value=None):

1040

1900

if value is None: # get

1042

1902

self.approved_by_default = bool(value)

1043

1903

1044

1904

# ApprovalDelay - property

1045

@dbus_service_property(_interface, signature="t",

1905

@dbus_service_property(_interface,

1906

signature="t",

1046

1907

access="readwrite")

1047

1908

def ApprovalDelay_dbus_property(self, value=None):

1048

1909

if value is None: # get

1049

return dbus.UInt64(self.approval_delay_milliseconds())

1910

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

1911

* 1000)

1050

1912

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

1051

1913

1052

1914

# ApprovalDuration - property

1053

@dbus_service_property(_interface, signature="t",

1915

@dbus_service_property(_interface,

1916

signature="t",

1054

1917

access="readwrite")

1055

1918

def ApprovalDuration_dbus_property(self, value=None):

1056

1919

if value is None: # get

1057

return dbus.UInt64(_timedelta_to_milliseconds(

1058

self.approval_duration))

1920

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

1921

* 1000)

1059

1922

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

1060

1923

1061

1924

# Name - property

1925

@dbus_annotations(

1926

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

1062

1927

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

1063

1928

def Name_dbus_property(self):

1064

1929

return dbus.String(self.name)

1065

1930

1066

1931

# Fingerprint - property

1932

@dbus_annotations(

1933

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

1067

1934

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

1068

1935

def Fingerprint_dbus_property(self):

1069

1936

return dbus.String(self.fingerprint)

1070

1937

1071

1938

# Host - property

1072

@dbus_service_property(_interface, signature="s",

1939

@dbus_service_property(_interface,

1940

signature="s",

1073

1941

access="readwrite")

1074

1942

def Host_dbus_property(self, value=None):

1075

1943

if value is None: # get

1076

1944

return dbus.String(self.host)

1077

self.host = value

1945

self.host = str(value)

1078

1946

1079

1947

# Created - property

1948

@dbus_annotations(

1949

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

1080

1950

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

1081

1951

def Created_dbus_property(self):

1082

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

1952

return datetime_to_dbus(self.created)

1083

1953

1084

1954

# LastEnabled - property

1085

1955

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

1087

1957

return datetime_to_dbus(self.last_enabled)

1088

1958

1089

1959

# Enabled - property

1090

@dbus_service_property(_interface, signature="b",

1960

@dbus_service_property(_interface,

1961

signature="b",

1091

1962

access="readwrite")

1092

1963

def Enabled_dbus_property(self, value=None):

1093

1964

if value is None: # get

1098

1969

self.disable()

1099

1970

1100

1971

# LastCheckedOK - property

1101

@dbus_service_property(_interface, signature="s",

1972

@dbus_service_property(_interface,

1973

signature="s",

1102

1974

access="readwrite")

1103

1975

def LastCheckedOK_dbus_property(self, value=None):

1104

1976

if value is not None:

1106

1978

return

1107

1979

return datetime_to_dbus(self.last_checked_ok)

1108

1980

1981

# LastCheckerStatus - property

1982

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

1983

def LastCheckerStatus_dbus_property(self):

1984

return dbus.Int16(self.last_checker_status)

1985

1109

1986

# Expires - property

1110

1987

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

1111

1988

def Expires_dbus_property(self):

1117

1994

return datetime_to_dbus(self.last_approval_request)

1118

1995

1119

1996

# Timeout - property

1120

@dbus_service_property(_interface, signature="t",

1997

@dbus_service_property(_interface,

1998

signature="t",

1121

1999

access="readwrite")

1122

2000

def Timeout_dbus_property(self, value=None):

1123

2001

if value is None: # get

1124

return dbus.UInt64(self.timeout_milliseconds())

2002

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

2003

old_timeout = self.timeout

1125

2004

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

1126

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

1127

return

1128

# Reschedule timeout

1129

gobject.source_remove(self.disable_initiator_tag)

1130

self.disable_initiator_tag = None

1131

self.expires = None

1132

time_to_die = (self.

1133

_timedelta_to_milliseconds((self

1134

.last_checked_ok

1135

+ self.timeout)

1136

- datetime.datetime

1137

.utcnow()))

1138

if time_to_die <= 0:

1139

# The timeout has passed

1140

self.disable()

1141

else:

1142

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

1143

+ datetime.timedelta(milliseconds = time_to_die))

1144

self.disable_initiator_tag = (gobject.timeout_add

1145

(time_to_die, self.disable))

2005

# Reschedule disabling

2006

if self.enabled:

2007

now = datetime.datetime.utcnow()

2008

self.expires += self.timeout - old_timeout

2009

if self.expires <= now:

2010

# The timeout has passed

2011

self.disable()

2012

else:

2013

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

2014

is None):

2015

return

2016

gobject.source_remove(self.disable_initiator_tag)

2017

self.disable_initiator_tag = gobject.timeout_add(

2018

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

2019

self.disable)

1146

2020

1147

2021

# ExtendedTimeout - property

1148

@dbus_service_property(_interface, signature="t",

2022

@dbus_service_property(_interface,

2023

signature="t",

1149

2024

access="readwrite")

1150

2025

def ExtendedTimeout_dbus_property(self, value=None):

1151

2026

if value is None: # get

1152

return dbus.UInt64(self.extended_timeout_milliseconds())

2027

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

2028

* 1000)

1153

2029

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

1154

2030

1155

2031

# Interval - property

1156

@dbus_service_property(_interface, signature="t",

2032

@dbus_service_property(_interface,

2033

signature="t",

1157

2034

access="readwrite")

1158

2035

def Interval_dbus_property(self, value=None):

1159

2036

if value is None: # get

1160

return dbus.UInt64(self.interval_milliseconds())

2037

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

1161

2038

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

1162

2039

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

1163

2040

return

1164

# Reschedule checker run

1165

gobject.source_remove(self.checker_initiator_tag)

1166

self.checker_initiator_tag = (gobject.timeout_add

1167

(value, self.start_checker))

1168

self.start_checker() # Start one now, too

2041

if self.enabled:

2042

# Reschedule checker run

2043

gobject.source_remove(self.checker_initiator_tag)

2044

self.checker_initiator_tag = gobject.timeout_add(

2045

value, self.start_checker)

2046

self.start_checker() # Start one now, too

1169

2047

1170

2048

# Checker - property

1171

@dbus_service_property(_interface, signature="s",

2049

@dbus_service_property(_interface,

2050

signature="s",

1172

2051

access="readwrite")

1173

2052

def Checker_dbus_property(self, value=None):

1174

2053

if value is None: # get

1175

2054

return dbus.String(self.checker_command)

1176

self.checker_command = value

2055

self.checker_command = str(value)

1177

2056

1178

2057

# CheckerRunning - property

1179

@dbus_service_property(_interface, signature="b",

2058

@dbus_service_property(_interface,

2059

signature="b",

1180

2060

access="readwrite")

1181

2061

def CheckerRunning_dbus_property(self, value=None):

1182

2062

if value is None: # get

1187

2067

self.stop_checker()

1188

2068

1189

2069

# ObjectPath - property

2070

@dbus_annotations(

2071

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

2072

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

1190

2073

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

1191

2074

def ObjectPath_dbus_property(self):

1192

2075

return self.dbus_object_path # is already a dbus.ObjectPath

1193

2076

1194

2077

# Secret = property

1195

@dbus_service_property(_interface, signature="ay",

1196

access="write", byte_arrays=True)

2078

@dbus_annotations(

2079

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

2080

"invalidates"})

2081

@dbus_service_property(_interface,

2082

signature="ay",

2083

access="write",

2084

byte_arrays=True)

1197

2085

def Secret_dbus_property(self, value):

1198

self.secret = str(value)

2086

self.secret = bytes(value)

1199

2087

1200

2088

del _interface

1201

2089

1205

2093

self._pipe = child_pipe

1206

2094

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

1207

2095

if not self._pipe.recv():

1208

raise KeyError()

2096

raise KeyError(fpr)

1209

2097

1210

2098

def __getattribute__(self, name):

1211

if(name == '_pipe'):

2099

if name == '_pipe':

1212

2100

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

1213

2101

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

1214

2102

data = self._pipe.recv()

1215

2103

if data[0] == 'data':

1216

2104

return data[1]

1217

2105

if data[0] == 'function':

2106

1218

2107

def func(*args, **kwargs):

1219

2108

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

1220

2109

return self._pipe.recv()[1]

2110

1221

2111

return func

1222

2112

1223

2113

def __setattr__(self, name, value):

1224

if(name == '_pipe'):

2114

if name == '_pipe':

1225

2115

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

1226

2116

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

1227

2117

1228

class ClientDBusTransitional(ClientDBus):

1229

__metaclass__ = transitional_dbus_metaclass

1230

2118

1231

2119

class ClientHandler(socketserver.BaseRequestHandler, object):

1232

2120

"""A class to handle client connections.

1237

2125

def handle(self):

1238

2126

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

1239

2127

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

1240

unicode(self.client_address))

2128

str(self.client_address))

1241

2129

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

1242

2130

self.server.child_pipe.fileno())

1243

2131

1244

session = (gnutls.connection

1245

.ClientSession(self.request,

1246

gnutls.connection

1247

.X509Credentials()))

1248

1249

# Note: gnutls.connection.X509Credentials is really a

1250

# generic GnuTLS certificate credentials object so long as

1251

# no X.509 keys are added to it. Therefore, we can use it

1252

# here despite using OpenPGP certificates.

2132

session = gnutls.ClientSession(self.request)

1253

2133

1254

2134

#priority = ':'.join(("NONE", "+VERS-TLS1.1",

1255

2135

# "+AES-256-CBC", "+SHA1",

1259

2139

priority = self.server.gnutls_priority

1260

2140

if priority is None:

1261

2141

priority = "NORMAL"

1262

(gnutls.library.functions

1263

.gnutls_priority_set_direct(session._c_object,

1264

priority, None))

2142

gnutls.priority_set_direct(session._c_object, priority,

2143

None)

1265

2144

1266

2145

# Start communication using the Mandos protocol

1267

2146

# Get protocol number

1269

2148

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

1270

2149

try:

1271

2150

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

1272

raise RuntimeError

2151

raise RuntimeError(line)

1273

2152

except (ValueError, IndexError, RuntimeError) as error:

1274

2153

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

1275

2154

return

1277

2156

# Start GnuTLS connection

1278

2157

try:

1279

2158

session.handshake()

1280

except gnutls.errors.GNUTLSError as error:

2159

except gnutls.Error as error:

1281

2160

logger.warning("Handshake failed: %s", error)

1282

2161

# Do not run session.bye() here: the session is not

1283

2162

# established. Just abandon the request.

1287

2166

approval_required = False

1288

2167

try:

1289

2168

try:

1290

fpr = self.fingerprint(self.peer_certificate

1291

(session))

1292

except (TypeError,

1293

gnutls.errors.GNUTLSError) as error:

2169

fpr = self.fingerprint(

2170

self.peer_certificate(session))

2171

except (TypeError, gnutls.Error) as error:

1294

2172

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

1295

2173

return

1296

2174

logger.debug("Fingerprint: %s", fpr)

1309

2187

while True:

1310

2188

if not client.enabled:

1311

2189

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

1312

client.name)

2190

client.name)

1313

2191

if self.server.use_dbus:

1314

2192

# Emit D-Bus signal

1315

client.Rejected("Disabled")

2193

client.Rejected("Disabled")

1316

2194

return

1317

2195

1318

if client._approved or not client.approval_delay:

2196

if client.approved or not client.approval_delay:

1319

2197

#We are approved or approval is disabled

1320

2198

break

1321

elif client._approved is None:

2199

elif client.approved is None:

1322

2200

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

1323

2201

client.name)

1324

2202

if self.server.use_dbus:

1325

2203

# Emit D-Bus signal

1326

2204

client.NeedApproval(

1327

client.approval_delay_milliseconds(),

1328

client.approved_by_default)

2205

client.approval_delay.total_seconds()

2206

* 1000, client.approved_by_default)

1329

2207

else:

1330

2208

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

1331

2209

client.name)

1335

2213

return

1336

2214

1337

2215

#wait until timeout or approved

1338

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

1339

2216

time = datetime.datetime.now()

1340

2217

client.changedstate.acquire()

1341

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

2218

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

1342

2219

client.changedstate.release()

1343

2220

time2 = datetime.datetime.now()

1344

2221

if (time2 - time) >= delay:

1355

2232

else:

1356

2233

delay -= time2 - time

1357

2234

1358

sent_size = 0

1359

while sent_size < len(client.secret):

1360

try:

1361

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

1362

except gnutls.errors.GNUTLSError as error:

1363

logger.warning("gnutls send failed")

1364

return

1365

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

1366

sent, len(client.secret)

1367

- (sent_size + sent))

1368

sent_size += sent

2235

try:

2236

session.send(client.secret)

2237

except gnutls.Error as error:

2238

logger.warning("gnutls send failed",

2239

exc_info = error)

2240

return

1369

2241

1370

2242

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

1371

# bump the timeout as if seen

1372

client.checked_ok(client.extended_timeout)

2243

# bump the timeout using extended_timeout

2244

client.bump_timeout(client.extended_timeout)

1373

2245

if self.server.use_dbus:

1374

2246

# Emit D-Bus signal

1375

2247

client.GotSecret()

1379

2251

client.approvals_pending -= 1

1380

2252

try:

1381

2253

session.bye()

1382

except gnutls.errors.GNUTLSError as error:

1383

logger.warning("GnuTLS bye failed")

2254

except gnutls.Error as error:

2255

logger.warning("GnuTLS bye failed",

2256

exc_info=error)

1384

2257

1385

2258

@staticmethod

1386

2259

def peer_certificate(session):

1387

2260

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

1388

2261

# If not an OpenPGP certificate...

1389

if (gnutls.library.functions

1390

.gnutls_certificate_type_get(session._c_object)

1391

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1392

# ...do the normal thing

1393

return session.peer_certificate

2262

if (gnutls.certificate_type_get(session._c_object)

2263

!= gnutls.CRT_OPENPGP):

2264

# ...return invalid data

2265

return b""

1394

2266

list_size = ctypes.c_uint(1)

1395

cert_list = (gnutls.library.functions

1396

.gnutls_certificate_get_peers

2267

cert_list = (gnutls.certificate_get_peers

1397

2268

(session._c_object, ctypes.byref(list_size)))

1398

2269

if not bool(cert_list) and list_size.value != 0:

1399

raise gnutls.errors.GNUTLSError("error getting peer"

1400

" certificate")

2270

raise gnutls.Error("error getting peer certificate")

1401

2271

if list_size.value == 0:

1402

2272

return None

1403

2273

cert = cert_list[0]

1407

2277

def fingerprint(openpgp):

1408

2278

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1409

2279

# New GnuTLS "datum" with the OpenPGP public key

1410

datum = (gnutls.library.types

1411

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

1412

ctypes.POINTER

1413

(ctypes.c_ubyte)),

1414

ctypes.c_uint(len(openpgp))))

2280

datum = gnutls.datum_t(

2281

ctypes.cast(ctypes.c_char_p(openpgp),

2282

ctypes.POINTER(ctypes.c_ubyte)),

2283

ctypes.c_uint(len(openpgp)))

1415

2284

# New empty GnuTLS certificate

1416

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1417

(gnutls.library.functions

1418

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2285

crt = gnutls.openpgp_crt_t()

2286

gnutls.openpgp_crt_init(ctypes.byref(crt))

1419

2287

# Import the OpenPGP public key into the certificate

1420

(gnutls.library.functions

1421

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

1422

gnutls.library.constants

1423

.GNUTLS_OPENPGP_FMT_RAW))

2288

gnutls.openpgp_crt_import(crt, ctypes.byref(datum),

2289

gnutls.OPENPGP_FMT_RAW)

1424

2290

# Verify the self signature in the key

1425

2291

crtverify = ctypes.c_uint()

1426

(gnutls.library.functions

1427

.gnutls_openpgp_crt_verify_self(crt, 0,

1428

ctypes.byref(crtverify)))

2292

gnutls.openpgp_crt_verify_self(crt, 0,

2293

ctypes.byref(crtverify))

1429

2294

if crtverify.value != 0:

1430

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1431

raise (gnutls.errors.CertificateSecurityError

1432

("Verify failed"))

2295

gnutls.openpgp_crt_deinit(crt)

2296

raise gnutls.CertificateSecurityError("Verify failed")

1433

2297

# New buffer for the fingerprint

1434

2298

buf = ctypes.create_string_buffer(20)

1435

2299

buf_len = ctypes.c_size_t()

1436

2300

# Get the fingerprint from the certificate into the buffer

1437

(gnutls.library.functions

1438

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

1439

ctypes.byref(buf_len)))

2301

gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

2302

ctypes.byref(buf_len))

1440

2303

# Deinit the certificate

1441

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2304

gnutls.openpgp_crt_deinit(crt)

1442

2305

# Convert the buffer to a Python bytestring

1443

2306

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

1444

2307

# Convert the bytestring to hexadecimal notation

1445

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

2308

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

1446

2309

return hex_fpr

1447

2310

1448

2311

1449

2312

class MultiprocessingMixIn(object):

1450

2313

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

2314

1451

2315

def sub_process_main(self, request, address):

1452

2316

try:

1453

2317

self.finish_request(request, address)

1454

except:

2318

except Exception:

1455

2319

self.handle_error(request, address)

1456

2320

self.close_request(request)

1457

2321

1458

2322

def process_request(self, request, address):

1459

2323

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

1460

multiprocessing.Process(target = self.sub_process_main,

1461

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

2324

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

2325

args = (request, address))

2326

proc.start()

2327

return proc

1462

2328

1463

2329

1464

2330

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1465

2331

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

2332

1466

2333

def process_request(self, request, client_address):

1467

2334

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

1468

2335

1470

2337

"""

1471

2338

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1472

2339

1473

super(MultiprocessingMixInWithPipe,

1474

self).process_request(request, client_address)

2340

proc = MultiprocessingMixIn.process_request(self, request,

2341

client_address)

1475

2342

self.child_pipe.close()

1476

self.add_pipe(parent_pipe)

2343

self.add_pipe(parent_pipe, proc)

1477

2344

1478

def add_pipe(self, parent_pipe):

2345

def add_pipe(self, parent_pipe, proc):

1479

2346

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

1480

raise NotImplementedError

2347

raise NotImplementedError()

1481

2348

1482

2349

1483

2350

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1489

2356

interface: None or a network interface name (string)

1490

2357

use_ipv6: Boolean; to use IPv6 or not

1491

2358

"""

2359

1492

2360

def __init__(self, server_address, RequestHandlerClass,

1493

interface=None, use_ipv6=True):

2361

interface=None,

2362

use_ipv6=True,

2363

socketfd=None):

2364

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

2365

creating a new one with socket.socket().

2366

"""

1494

2367

self.interface = interface

1495

2368

if use_ipv6:

1496

2369

self.address_family = socket.AF_INET6

2370

if socketfd is not None:

2371

# Save the file descriptor

2372

self.socketfd = socketfd

2373

# Save the original socket.socket() function

2374

self.socket_socket = socket.socket

2375

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

2376

#

2377

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

2378

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

2379

# patching socket.socket.)

2380

#

2381

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

2382

@functools.wraps(socket.socket)

2383

def socket_wrapper(*args, **kwargs):

2384

# Restore original function so subsequent calls are

2385

# not affected.

2386

socket.socket = self.socket_socket

2387

del self.socket_socket

2388

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

2389

# saved file descriptor.

2390

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

2391

# Replace socket.socket() function with wrapper

2392

socket.socket = socket_wrapper

2393

# The socketserver.TCPServer.__init__ will call

2394

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

2395

# socket_wrapper(), if socketfd was set.

1497

2396

socketserver.TCPServer.__init__(self, server_address,

1498

2397

RequestHandlerClass)

2398

1499

2399

def server_bind(self):

1500

2400

"""This overrides the normal server_bind() function

1501

2401

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

1507

2407

self.interface)

1508

2408

else:

1509

2409

try:

1510

self.socket.setsockopt(socket.SOL_SOCKET,

1511

SO_BINDTODEVICE,

1512

str(self.interface

1513

+ '\0'))

2410

self.socket.setsockopt(

2411

socket.SOL_SOCKET, SO_BINDTODEVICE,

2412

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

1514

2413

except socket.error as error:

1515

if error[0] == errno.EPERM:

1516

logger.error("No permission to"

1517

" bind to interface %s",

1518

self.interface)

1519

elif error[0] == errno.ENOPROTOOPT:

2414

if error.errno == errno.EPERM:

2415

logger.error("No permission to bind to"

2416

" interface %s", self.interface)

2417

elif error.errno == errno.ENOPROTOOPT:

1520

2418

logger.error("SO_BINDTODEVICE not available;"

1521

2419

" cannot bind to interface %s",

1522

2420

self.interface)

2421

elif error.errno == errno.ENODEV:

2422

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

2423

" cannot bind", self.interface)

1523

2424

else:

1524

2425

raise

1525

2426

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

1528

2429

if self.address_family == socket.AF_INET6:

1529

2430

any_address = "::" # in6addr_any

1530

2431

else:

1531

any_address = socket.INADDR_ANY

2432

any_address = "0.0.0.0" # INADDR_ANY

1532

2433

self.server_address = (any_address,

1533

2434

self.server_address[1])

1534

2435

elif not self.server_address[1]:

1535

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

1536

0)

2436

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

1537

2437

# if self.interface:

1538

2438

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

1539

2439

# 0, # port

1553

2453

1554

2454

Assumes a gobject.MainLoop event loop.

1555

2455

"""

2456

1556

2457

def __init__(self, server_address, RequestHandlerClass,

1557

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

1558

gnutls_priority=None, use_dbus=True):

2458

interface=None,

2459

use_ipv6=True,

2460

clients=None,

2461

gnutls_priority=None,

2462

use_dbus=True,

2463

socketfd=None):

1559

2464

self.enabled = False

1560

2465

self.clients = clients

1561

2466

if self.clients is None:

1562

self.clients = set()

2467

self.clients = {}

1563

2468

self.use_dbus = use_dbus

1564

2469

self.gnutls_priority = gnutls_priority

1565

2470

IPv6_TCPServer.__init__(self, server_address,

1566

2471

RequestHandlerClass,

1567

2472

interface = interface,

1568

use_ipv6 = use_ipv6)

2473

use_ipv6 = use_ipv6,

2474

socketfd = socketfd)

2475

1569

2476

def server_activate(self):

1570

2477

if self.enabled:

1571

2478

return socketserver.TCPServer.server_activate(self)

2479

1572

2480

def enable(self):

1573

2481

self.enabled = True

1574

def add_pipe(self, parent_pipe):

2482

2483

def add_pipe(self, parent_pipe, proc):

1575

2484

# Call "handle_ipc" for both data and EOF events

1576

gobject.io_add_watch(parent_pipe.fileno(),

1577

gobject.IO_IN | gobject.IO_HUP,

1578

functools.partial(self.handle_ipc,

1579

parent_pipe = parent_pipe))

1580

1581

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

2485

gobject.io_add_watch(

2486

parent_pipe.fileno(),

2487

gobject.IO_IN | gobject.IO_HUP,

2488

functools.partial(self.handle_ipc,

2489

parent_pipe = parent_pipe,

2490

proc = proc))

2491

2492

def handle_ipc(self, source, condition,

2493

parent_pipe=None,

2494

proc = None,

1582

2495

client_object=None):

1583

condition_names = {

1584

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

1585

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

1586

# blocking).

1587

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

1588

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

1589

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

1590

# broken, usually for pipes and

1591

# sockets).

1592

}

1593

conditions_string = ' | '.join(name

1594

for cond, name in

1595

condition_names.iteritems()

1596

if cond & condition)

1597

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

1598

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

2496

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

2497

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

2498

# Wait for other process to exit

2499

proc.join()

1599

2500

return False

1600

2501

1601

2502

# Read a request from the child

1606

2507

fpr = request[1]

1607

2508

address = request[2]

1608

2509

1609

for c in self.clients:

2510

for c in self.clients.itervalues():

1610

2511

if c.fingerprint == fpr:

1611

2512

client = c

1612

2513

break

1615

2516

"dress: %s", fpr, address)

1616

2517

if self.use_dbus:

1617

2518

# Emit D-Bus signal

1618

mandos_dbus_service.ClientNotFound(fpr, address[0])

2519

mandos_dbus_service.ClientNotFound(fpr,

2520

address[0])

1619

2521

parent_pipe.send(False)

1620

2522

return False

1621

2523

1622

gobject.io_add_watch(parent_pipe.fileno(),

1623

gobject.IO_IN | gobject.IO_HUP,

1624

functools.partial(self.handle_ipc,

1625

parent_pipe = parent_pipe,

1626

client_object = client))

2524

gobject.io_add_watch(

2525

parent_pipe.fileno(),

2526

gobject.IO_IN | gobject.IO_HUP,

2527

functools.partial(self.handle_ipc,

2528

parent_pipe = parent_pipe,

2529

proc = proc,

2530

client_object = client))

1627

2531

parent_pipe.send(True)

1628

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

2532

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

2533

# same fileno

1629

2534

return False

1630

2535

if command == 'funcall':

1631

2536

funcname = request[1]

1632

2537

args = request[2]

1633

2538

kwargs = request[3]

1634

2539

1635

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

2540

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

2541

funcname)(*args,

2542

**kwargs)))

1636

2543

1637

2544

if command == 'getattr':

1638

2545

attrname = request[1]

1639

if callable(client_object.__getattribute__(attrname)):

1640

parent_pipe.send(('function',))

2546

if isinstance(client_object.__getattribute__(attrname),

2547

collections.Callable):

2548

parent_pipe.send(('function', ))

1641

2549

else:

1642

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

2550

parent_pipe.send((

2551

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

1643

2552

1644

2553

if command == 'setattr':

1645

2554

attrname = request[1]

1649

2558

return True

1650

2559

1651

2560

2561

def rfc3339_duration_to_delta(duration):

2562

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

2563

2564

>>> rfc3339_duration_to_delta("P7D")

2565

datetime.timedelta(7)

2566

>>> rfc3339_duration_to_delta("PT60S")

2567

datetime.timedelta(0, 60)

2568

>>> rfc3339_duration_to_delta("PT60M")

2569

datetime.timedelta(0, 3600)

2570

>>> rfc3339_duration_to_delta("PT24H")

2571

datetime.timedelta(1)

2572

>>> rfc3339_duration_to_delta("P1W")

2573

datetime.timedelta(7)

2574

>>> rfc3339_duration_to_delta("PT5M30S")

2575

datetime.timedelta(0, 330)

2576

>>> rfc3339_duration_to_delta("P1DT3M20S")

2577

datetime.timedelta(1, 200)

2578

"""

2579

2580

# Parsing an RFC 3339 duration with regular expressions is not

2581

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

2582

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

2583

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

2584

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

2585

# avoid excessive use of external libraries.

2586

2587

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

2588

Token = collections.namedtuple("Token", (

2589

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

2590

# a "group" containing digits

2591

"value", # datetime.timedelta or None

2592

"followers")) # Tokens valid after this token

2593

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

2594

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

2595

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

2596

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

2597

datetime.timedelta(seconds=1),

2598

frozenset((token_end, )))

2599

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

2600

datetime.timedelta(minutes=1),

2601

frozenset((token_second, token_end)))

2602

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

2603

datetime.timedelta(hours=1),

2604

frozenset((token_minute, token_end)))

2605

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

2606

None,

2607

frozenset((token_hour, token_minute,

2608

token_second)))

2609

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

2610

datetime.timedelta(days=1),

2611

frozenset((token_time, token_end)))

2612

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

2613

datetime.timedelta(weeks=4),

2614

frozenset((token_day, token_end)))

2615

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

2616

datetime.timedelta(weeks=52),

2617

frozenset((token_month, token_end)))

2618

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

2619

datetime.timedelta(weeks=1),

2620

frozenset((token_end, )))

2621

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

2622

frozenset((token_year, token_month,

2623

token_day, token_time,

2624

token_week)))

2625

# Define starting values

2626

value = datetime.timedelta() # Value so far

2627

found_token = None

2628

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

2629

s = duration # String left to parse

2630

# Loop until end token is found

2631

while found_token is not token_end:

2632

# Search for any currently valid tokens

2633

for token in followers:

2634

match = token.regexp.match(s)

2635

if match is not None:

2636

# Token found

2637

if token.value is not None:

2638

# Value found, parse digits

2639

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

2640

# Add to value so far

2641

value += factor * token.value

2642

# Strip token from string

2643

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

2644

# Go to found token

2645

found_token = token

2646

# Set valid next tokens

2647

followers = found_token.followers

2648

break

2649

else:

2650

# No currently valid tokens were found

2651

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

2652

.format(duration))

2653

# End token found

2654

return value

2655

2656

1652

2657

def string_to_delta(interval):

1653

2658

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

1654

2659

1665

2670

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

1666

2671

datetime.timedelta(0, 330)

1667

2672

"""

2673

2674

try:

2675

return rfc3339_duration_to_delta(interval)

2676

except ValueError:

2677

pass

2678

1668

2679

timevalue = datetime.timedelta(0)

1669

2680

for s in interval.split():

1670

2681

try:

1671

suffix = unicode(s[-1])

2682

suffix = s[-1]

1672

2683

value = int(s[:-1])

1673

2684

if suffix == "d":

1674

2685

delta = datetime.timedelta(value)

1681

2692

elif suffix == "w":

1682

2693

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

1683

2694

else:

1684

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

1685

except (ValueError, IndexError) as e:

2695

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

2696

except IndexError as e:

1686

2697

raise ValueError(*(e.args))

1687

2698

timevalue += delta

1688

2699

return timevalue

1689

2700

1690

2701

1691

def if_nametoindex(interface):

1692

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

1693

1694

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

1695

global if_nametoindex

1696

try:

1697

if_nametoindex = (ctypes.cdll.LoadLibrary

1698

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

1699

.if_nametoindex)

1700

except (OSError, AttributeError):

1701

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

1702

def if_nametoindex(interface):

1703

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

1704

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

1705

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

1706

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1707

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

1708

interface))

1709

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

1710

ifreq[16:20])[0]

1711

return interface_index

1712

return if_nametoindex(interface)

1713

1714

1715

2702

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

1716

2703

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

1717

2704

1725

2712

sys.exit()

1726

2713

if not noclose:

1727

2714

# Close all standard open file descriptors

1728

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

2715

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

1729

2716

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

1730

2717

raise OSError(errno.ENODEV,

1731

"%s not a character device"

1732

% os.path.devnull)

2718

"{} not a character device"

2719

.format(os.devnull))

1733

2720

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

1734

2721

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

1735

2722

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

1744

2731

1745

2732

parser = argparse.ArgumentParser()

1746

2733

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

1747

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

2734

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

1748

2735

help="show version number and exit")

1749

2736

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

1750

2737

help="Bind to interface IF")

1756

2743

help="Run self-test")

1757

2744

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

1758

2745

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

1759

" to terminal")

2746

" to terminal", default=None)

1760

2747

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

1761

2748

help="Debug level for stdout output")

1762

2749

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

1769

2756

" files")

1770

2757

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

1771

2758

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

1772

" system bus interface")

2759

" system bus interface", default=None)

1773

2760

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

1774

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

2761

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

2762

default=None)

2763

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

2764

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

2765

" state", default=None)

2766

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

2767

help="Specify a file descriptor to a network"

2768

" socket to use instead of creating one")

2769

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

2770

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

2771

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

2772

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

2773

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

2774

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

2775

default=None)

2776

1775

2777

options = parser.parse_args()

1776

2778

1777

2779

if options.check:

1778

2780

import doctest

1779

doctest.testmod()

1780

sys.exit()

2781

fail_count, test_count = doctest.testmod()

2782

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

1781

2783

1782

2784

# Default values for config file for server-global settings

1783

2785

server_defaults = { "interface": "",

1785

2787

"port": "",

1786

2788

"debug": "False",

1787

2789

"priority":

1788

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

2790

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

2791

":+SIGN-DSA-SHA256",

1789

2792

"servicename": "Mandos",

1790

2793

"use_dbus": "True",

1791

2794

"use_ipv6": "True",

1792

2795

"debuglevel": "",

1793

}

2796

"restore": "True",

2797

"socket": "",

2798

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

2799

"foreground": "False",

2800

"zeroconf": "True",

2801

}

1794

2802

1795

2803

# Parse config file for server-global settings

1796

2804

server_config = configparser.SafeConfigParser(server_defaults)

1797

2805

del server_defaults

1798

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

1799

"mandos.conf"))

2806

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

1800

2807

# Convert the SafeConfigParser object to a dict

1801

2808

server_settings = server_config.defaults()

1802

2809

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

1803

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

2810

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

1804

2811

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

1805

2812

option)

1806

2813

if server_settings["port"]:

1807

2814

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

1808

2815

"port")

2816

if server_settings["socket"]:

2817

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

2818

"socket")

2819

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

2820

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

2821

# happen with a supplied network socket.

2822

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

2823

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

2824

["socket"])

1809

2825

del server_config

1810

2826

1811

2827

# Override the settings from the config file with command line

1812

2828

# options, if set.

1813

2829

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

1814

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

1815

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

2830

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

2831

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

2832

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

1816

2833

value = getattr(options, option)

1817

2834

if value is not None:

1818

2835

server_settings[option] = value

1819

2836

del options

1820

2837

# Force all strings to be unicode

1821

2838

for option in server_settings.keys():

1822

if type(server_settings[option]) is str:

1823

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

2839

if isinstance(server_settings[option], bytes):

2840

server_settings[option] = (server_settings[option]

2841

.decode("utf-8"))

2842

# Force all boolean options to be boolean

2843

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

2844

"foreground", "zeroconf"):

2845

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

2846

# Debug implies foreground

2847

if server_settings["debug"]:

2848

server_settings["foreground"] = True

1824

2849

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

1825

2850

1826

2851

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

1827

2852

2853

if (not server_settings["zeroconf"]

2854

and not (server_settings["port"]

2855

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

2856

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

2857

1828

2858

# For convenience

1829

2859

debug = server_settings["debug"]

1830

2860

debuglevel = server_settings["debuglevel"]

1831

2861

use_dbus = server_settings["use_dbus"]

1832

2862

use_ipv6 = server_settings["use_ipv6"]

2863

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

2864

stored_state_file)

2865

foreground = server_settings["foreground"]

2866

zeroconf = server_settings["zeroconf"]

2867

2868

if debug:

2869

initlogger(debug, logging.DEBUG)

2870

else:

2871

if not debuglevel:

2872

initlogger(debug)

2873

else:

2874

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

2875

initlogger(debug, level)

1833

2876

1834

2877

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

1835

syslogger.setFormatter(logging.Formatter

1836

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

1837

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

1838

% server_settings["servicename"]))

2878

syslogger.setFormatter(

2879

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

2880

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

2881

server_settings["servicename"])))

1839

2882

1840

2883

# Parse config file with clients

1841

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

1842

"extended_timeout": "15m",

1843

"interval": "2m",

1844

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

1845

"host": "",

1846

"approval_delay": "0s",

1847

"approval_duration": "1s",

1848

}

1849

client_config = configparser.SafeConfigParser(client_defaults)

2884

client_config = configparser.SafeConfigParser(Client

2885

.client_defaults)

1850

2886

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

1851

2887

"clients.conf"))

1852

2888

1853

2889

global mandos_dbus_service

1854

2890

mandos_dbus_service = None

1855

2891

1856

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

1857

server_settings["port"]),

1858

ClientHandler,

1859

interface=(server_settings["interface"]

1860

or None),

1861

use_ipv6=use_ipv6,

1862

gnutls_priority=

1863

server_settings["priority"],

1864

use_dbus=use_dbus)

1865

if not debug:

1866

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

2892

socketfd = None

2893

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

2894

socketfd = server_settings["socket"]

2895

tcp_server = MandosServer(

2896

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

2897

ClientHandler,

2898

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

2899

use_ipv6=use_ipv6,

2900

gnutls_priority=server_settings["priority"],

2901

use_dbus=use_dbus,

2902

socketfd=socketfd)

2903

if not foreground:

2904

pidfilename = "/run/mandos.pid"

2905

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

2906

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

2907

pidfile = None

1867

2908

try:

1868

pidfile = open(pidfilename, "w")

1869

except IOError:

1870

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

2909

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

2910

except IOError as e:

2911

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

2912

exc_info=e)

1871

2913

1872

try:

1873

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

1874

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

1875

except KeyError:

2914

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

1876

2915

try:

1877

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

1878

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

2916

uid = pwd.getpwnam(name).pw_uid

2917

gid = pwd.getpwnam(name).pw_gid

2918

break

1879

2919

except KeyError:

1880

try:

1881

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

1882

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

1883

except KeyError:

1884

uid = 65534

1885

gid = 65534

2920

continue

2921

else:

2922

uid = 65534

2923

gid = 65534

1886

2924

try:

1887

2925

os.setgid(gid)

1888

2926

os.setuid(uid)

1889

2927

except OSError as error:

1890

if error[0] != errno.EPERM:

1891

raise error

1892

1893

if not debug and not debuglevel:

1894

syslogger.setLevel(logging.WARNING)

1895

console.setLevel(logging.WARNING)

1896

if debuglevel:

1897

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

1898

syslogger.setLevel(level)

1899

console.setLevel(level)

2928

if error.errno != errno.EPERM:

2929

raise

1900

2930

1901

2931

if debug:

1902

2932

# Enable all possible GnuTLS debugging

1903

2933

1904

2934

# "Use a log level over 10 to enable all debugging options."

1905

2935

# - GnuTLS manual

1906

gnutls.library.functions.gnutls_global_set_log_level(11)

2936

gnutls.global_set_log_level(11)

1907

2937

1908

@gnutls.library.types.gnutls_log_func

2938

@gnutls.log_func

1909

2939

def debug_gnutls(level, string):

1910

2940

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

1911

2941

1912

(gnutls.library.functions

1913

.gnutls_global_set_log_function(debug_gnutls))

2942

gnutls.global_set_log_function(debug_gnutls)

1914

2943

1915

2944

# Redirect stdin so all checkers get /dev/null

1916

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

2945

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

1917

2946

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

1918

2947

if null > 2:

1919

2948

os.close(null)

1920

else:

1921

# No console logging

1922

logger.removeHandler(console)

1923

2949

1924

2950

# Need to fork before connecting to D-Bus

1925

if not debug:

2951

if not foreground:

1926

2952

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

1927

2953

daemon()

1928

2954

2955

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

2956

# need to inform gobject that threads will be used.

2957

gobject.threads_init()

2958

1929

2959

global main_loop

1930

2960

# From the Avahi example code

1931

DBusGMainLoop(set_as_default=True )

2961

DBusGMainLoop(set_as_default=True)

1932

2962

main_loop = gobject.MainLoop()

1933

2963

bus = dbus.SystemBus()

1934

2964

# End of Avahi example code

1935

2965

if use_dbus:

1936

2966

try:

1937

2967

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

1938

bus, do_not_queue=True)

1939

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

1940

bus, do_not_queue=True)

1941

except dbus.exceptions.NameExistsException as e:

1942

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

2968

bus,

2969

do_not_queue=True)

2970

old_bus_name = dbus.service.BusName(

2971

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

2972

do_not_queue=True)

2973

except dbus.exceptions.DBusException as e:

2974

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

1943

2975

use_dbus = False

1944

2976

server_settings["use_dbus"] = False

1945

2977

tcp_server.use_dbus = False

1946

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1947

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

1948

servicetype = "_mandos._tcp",

1949

protocol = protocol, bus = bus)

1950

if server_settings["interface"]:

1951

service.interface = (if_nametoindex

1952

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

2978

if zeroconf:

2979

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2980

service = AvahiServiceToSyslog(

2981

name = server_settings["servicename"],

2982

servicetype = "_mandos._tcp",

2983

protocol = protocol,

2984

bus = bus)

2985

if server_settings["interface"]:

2986

service.interface = if_nametoindex(

2987

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

1953

2988

1954

2989

global multiprocessing_manager

1955

2990

multiprocessing_manager = multiprocessing.Manager()

1956

2991

1957

2992

client_class = Client

1958

2993

if use_dbus:

1959

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

1960

def client_config_items(config, section):

1961

special_settings = {

1962

"approved_by_default":

1963

lambda: config.getboolean(section,

1964

"approved_by_default"),

1965

}

1966

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

2994

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

2995

2996

client_settings = Client.config_parser(client_config)

2997

old_client_settings = {}

2998

clients_data = {}

2999

3000

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

3001

global wnull

3002

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

3003

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

3004

# mode

3005

if debug or not foreground:

3006

wnull.close()

3007

3008

# Get client data and settings from last running state.

3009

if server_settings["restore"]:

3010

try:

3011

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

3012

clients_data, old_client_settings = pickle.load(

3013

stored_state)

3014

os.remove(stored_state_path)

3015

except IOError as e:

3016

if e.errno == errno.ENOENT:

3017

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

3018

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

3019

else:

3020

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

3021

exc_info=e)

3022

raise

3023

except EOFError as e:

3024

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

3025

"EOFError:",

3026

exc_info=e)

3027

3028

with PGPEngine() as pgp:

3029

for client_name, client in clients_data.items():

3030

# Skip removed clients

3031

if client_name not in client_settings:

3032

continue

3033

3034

# Decide which value to use after restoring saved state.

3035

# We have three different values: Old config file,

3036

# new config file, and saved state.

3037

# New config value takes precedence if it differs from old

3038

# config value, otherwise use saved state.

3039

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

3040

try:

3041

# For each value in new config, check if it

3042

# differs from the old config value (Except for

3043

# the "secret" attribute)

3044

if (name != "secret"

3045

and (value !=

3046

old_client_settings[client_name][name])):

3047

client[name] = value

3048

except KeyError:

3049

pass

3050

3051

# Clients who has passed its expire date can still be

3052

# enabled if its last checker was successful. A Client

3053

# whose checker succeeded before we stored its state is

3054

# assumed to have successfully run all checkers during

3055

# downtime.

3056

if client["enabled"]:

3057

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

3058

if not client["last_checked_ok"]:

3059

logger.warning(

3060

"disabling client {} - Client never "

3061

"performed a successful checker".format(

3062

client_name))

3063

client["enabled"] = False

3064

elif client["last_checker_status"] != 0:

3065

logger.warning(

3066

"disabling client {} - Client last"

3067

" checker failed with error code"

3068

" {}".format(

3069

client_name,

3070

client["last_checker_status"]))

3071

client["enabled"] = False

3072

else:

3073

client["expires"] = (

3074

datetime.datetime.utcnow()

3075

+ client["timeout"])

3076

logger.debug("Last checker succeeded,"

3077

" keeping {} enabled".format(

3078

client_name))

1967

3079

try:

1968

yield (name, special_settings[name]())

1969

except KeyError:

1970

yield (name, value)

1971

1972

tcp_server.clients.update(set(

1973

client_class(name = section,

1974

config= dict(client_config_items(

1975

client_config, section)))

1976

for section in client_config.sections()))

3080

client["secret"] = pgp.decrypt(

3081

client["encrypted_secret"],

3082

client_settings[client_name]["secret"])

3083

except PGPError:

3084

# If decryption fails, we use secret from new settings

3085

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

3086

client_name))

3087

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

3088

["secret"])

3089

3090

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

3091

for client_name in (set(old_client_settings)

3092

- set(client_settings)):

3093

del clients_data[client_name]

3094

for client_name in (set(client_settings)

3095

- set(old_client_settings)):

3096

clients_data[client_name] = client_settings[client_name]

3097

3098

# Create all client objects

3099

for client_name, client in clients_data.items():

3100

tcp_server.clients[client_name] = client_class(

3101

name = client_name,

3102

settings = client,

3103

server_settings = server_settings)

3104

1977

3105

if not tcp_server.clients:

1978

3106

logger.warning("No clients defined")

1979

1980

if not debug:

1981

try:

1982

with pidfile:

1983

pid = os.getpid()

1984

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

1985

del pidfile

1986

except IOError:

1987

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

1988

pidfilename, pid)

1989

except NameError:

1990

# "pidfile" was never created

1991

pass

3107

3108

if not foreground:

3109

if pidfile is not None:

3110

pid = os.getpid()

3111

try:

3112

with pidfile:

3113

print(pid, file=pidfile)

3114

except IOError:

3115

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

3116

pidfilename, pid)

3117

del pidfile

1992

3118

del pidfilename

1993

1994

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

1995

3119

1996

3120

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

1997

3121

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

1998

3122

1999

3123

if use_dbus:

2000

class MandosDBusService(dbus.service.Object):

3124

3125

@alternate_dbus_interfaces(

3126

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

3127

class MandosDBusService(DBusObjectWithObjectManager):

2001

3128

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

3129

2002

3130

def __init__(self):

2003

3131

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

2004

_interface = "se.bsnet.fukt.Mandos"

3132

3133

_interface = "se.recompile.Mandos"

2005

3134

2006

3135

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

2007

3136

def ClientAdded(self, objpath):

2013

3142

"D-Bus signal"

2014

3143

pass

2015

3144

3145

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

3146

"true"})

2016

3147

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

2017

3148

def ClientRemoved(self, objpath, name):

2018

3149

"D-Bus signal"

2019

3150

pass

2020

3151

3152

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

3153

"true"})

2021

3154

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

2022

3155

def GetAllClients(self):

2023

3156

"D-Bus method"

2024

return dbus.Array(c.dbus_object_path

2025

for c in tcp_server.clients)

3157

return dbus.Array(c.dbus_object_path for c in

3158

tcp_server.clients.itervalues())

2026

3159

3160

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

3161

"true"})

2027

3162

@dbus.service.method(_interface,

2028

3163

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

2029

3164

def GetAllClientsWithProperties(self):

2030

3165

"D-Bus method"

2031

3166

return dbus.Dictionary(

2032

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

2033

for c in tcp_server.clients),

3167

{ c.dbus_object_path: c.GetAll(

3168

"se.recompile.Mandos.Client")

3169

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

2034

3170

signature="oa{sv}")

2035

3171

2036

3172

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

2037

3173

def RemoveClient(self, object_path):

2038

3174

"D-Bus method"

2039

for c in tcp_server.clients:

3175

for c in tcp_server.clients.itervalues():

2040

3176

if c.dbus_object_path == object_path:

2041

tcp_server.clients.remove(c)

3177

del tcp_server.clients[c.name]

2042

3178

c.remove_from_connection()

2043

# Don't signal anything except ClientRemoved

3179

# Don't signal the disabling

2044

3180

c.disable(quiet=True)

2045

# Emit D-Bus signal

2046

self.ClientRemoved(object_path, c.name)

3181

# Emit D-Bus signal for removal

3182

self.client_removed_signal(c)

2047

3183

return

2048

3184

raise KeyError(object_path)

2049

3185

2050

3186

del _interface

3187

3188

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3189

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

3190

def GetManagedObjects(self):

3191

"""D-Bus method"""

3192

return dbus.Dictionary(

3193

{ client.dbus_object_path:

3194

dbus.Dictionary(

3195

{ interface: client.GetAll(interface)

3196

for interface in

3197

client._get_all_interface_names()})

3198

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

3199

3200

def client_added_signal(self, client):

3201

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

3202

if use_dbus:

3203

# New standard signal

3204

self.InterfacesAdded(

3205

client.dbus_object_path,

3206

dbus.Dictionary(

3207

{ interface: client.GetAll(interface)

3208

for interface in

3209

client._get_all_interface_names()}))

3210

# Old signal

3211

self.ClientAdded(client.dbus_object_path)

3212

3213

def client_removed_signal(self, client):

3214

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

3215

if use_dbus:

3216

# New standard signal

3217

self.InterfacesRemoved(

3218

client.dbus_object_path,

3219

client._get_all_interface_names())

3220

# Old signal

3221

self.ClientRemoved(client.dbus_object_path,

3222

client.name)

2051

3223

2052

class MandosDBusServiceTransitional(MandosDBusService):

2053

__metaclass__ = transitional_dbus_metaclass

2054

mandos_dbus_service = MandosDBusServiceTransitional()

3224

mandos_dbus_service = MandosDBusService()

2055

3225

2056

3226

def cleanup():

2057

3227

"Cleanup function; run on exit"

2058

service.cleanup()

2059

3228

if zeroconf:

3229

service.cleanup()

3230

3231

multiprocessing.active_children()

3232

wnull.close()

3233

if not (tcp_server.clients or client_settings):

3234

return

3235

3236

# Store client before exiting. Secrets are encrypted with key

3237

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

3238

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

3239

clients = {}

3240

with PGPEngine() as pgp:

3241

for client in tcp_server.clients.itervalues():

3242

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

3243

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

3244

key)

3245

client_dict = {}

3246

3247

# A list of attributes that can not be pickled

3248

# + secret.

3249

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

3250

"checker", "server_settings" }

3251

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

3252

.Object):

3253

exclude.add(name)

3254

3255

client_dict["encrypted_secret"] = (client

3256

.encrypted_secret)

3257

for attr in client.client_structure:

3258

if attr not in exclude:

3259

client_dict[attr] = getattr(client, attr)

3260

3261

clients[client.name] = client_dict

3262

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

3263

3264

try:

3265

with tempfile.NamedTemporaryFile(

3266

mode='wb',

3267

suffix=".pickle",

3268

prefix='clients-',

3269

dir=os.path.dirname(stored_state_path),

3270

delete=False) as stored_state:

3271

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

3272

tempname = stored_state.name

3273

os.rename(tempname, stored_state_path)

3274

except (IOError, OSError) as e:

3275

if not debug:

3276

try:

3277

os.remove(tempname)

3278

except NameError:

3279

pass

3280

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

3281

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

3282

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

3283

else:

3284

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

3285

exc_info=e)

3286

raise

3287

3288

# Delete all clients, and settings from config

2060

3289

while tcp_server.clients:

2061

client = tcp_server.clients.pop()

3290

name, client = tcp_server.clients.popitem()

2062

3291

if use_dbus:

2063

3292

client.remove_from_connection()

2064

client.disable_hook = None

2065

# Don't signal anything except ClientRemoved

3293

# Don't signal the disabling

2066

3294

client.disable(quiet=True)

3295

# Emit D-Bus signal for removal

2067

3296

if use_dbus:

2068

# Emit D-Bus signal

2069

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2070

client.name)

3297

mandos_dbus_service.client_removed_signal(client)

3298

client_settings.clear()

2071

3299

2072

3300

atexit.register(cleanup)

2073

3301

2074

for client in tcp_server.clients:

3302

for client in tcp_server.clients.itervalues():

2075

3303

if use_dbus:

2076

# Emit D-Bus signal

2077

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2078

client.enable()

3304

# Emit D-Bus signal for adding

3305

mandos_dbus_service.client_added_signal(client)

3306

# Need to initiate checking of clients

3307

if client.enabled:

3308

client.init_checker()

2079

3309

2080

3310

tcp_server.enable()

2081

3311

tcp_server.server_activate()

2082

3312

2083

3313

# Find out what port we got

2084

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

3314

if zeroconf:

3315

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

2085

3316

if use_ipv6:

2086

3317

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

2087

" flowinfo %d, scope_id %d"

2088

% tcp_server.socket.getsockname())

3318

" flowinfo %d, scope_id %d",

3319

*tcp_server.socket.getsockname())

2089

3320

else: # IPv4

2090

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

2091

% tcp_server.socket.getsockname())

3321

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

3322

*tcp_server.socket.getsockname())

2092

3323

2093

3324

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

2094

3325

2095

3326

try:

2096

# From the Avahi example code

2097

try:

2098

service.activate()

2099

except dbus.exceptions.DBusException as error:

2100

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

2101

cleanup()

2102

sys.exit(1)

2103

# End of Avahi example code

3327

if zeroconf:

3328

# From the Avahi example code

3329

try:

3330

service.activate()

3331

except dbus.exceptions.DBusException as error:

3332

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

3333

cleanup()

3334

sys.exit(1)

3335

# End of Avahi example code

2104

3336

2105

3337

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

2106

3338

lambda *args, **kwargs:

2110

3342

logger.debug("Starting main loop")

2111

3343

main_loop.run()

2112

3344

except AvahiError as error:

2113

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

3345

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

2114

3346

cleanup()

2115

3347

sys.exit(1)

2116

3348

except KeyboardInterrupt: