/mandos/trunk : revision 521

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# "AvahiService" class, and some lines in "main".

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#

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# Everything else is

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#

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# This program is free software: you can redistribute it and/or modify

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# it under the terms of the GNU General Public License as published by

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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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 SocketServer as 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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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 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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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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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 cPickle as 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 hashlib

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import dbus

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import dbus.service

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try:

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from gi.repository import GObject

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except ImportError:

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import gobject as GObject

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import 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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import ctypes.util

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import xml.dom.minidom

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import inspect

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import Crypto.Cipher.AES

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.4"

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stored_state_file = "clients.pickle"

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version = "1.4.1"

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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.gpg = "gpg"

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try:

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output = subprocess.check_output(["gpgconf"])

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for line in output.splitlines():

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name, text, path = line.split(":")

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', 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([self.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([self.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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stored_state_path = "/var/lib/mandos/clients.pickle"

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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('%(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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class AvahiError(Exception):

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

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self.value = value

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

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**kwargs)

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

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

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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,

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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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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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self.interface = interface

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self.name = name

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self.type = servicetype

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158

self.server = None

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self.bus = bus

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160

self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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

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163

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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166

self.rename_count)

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raise AvahiServiceError("Too many renames")

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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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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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logger.info("Changing Zeroconf service name to %r ...",

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self.name)

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if remove:

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

177

self.cleanup()

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os._exit(1)

179

self.rename_count += 1

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180

def remove(self):

331

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

332

182

if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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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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361

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def entry_group_state_changed(self, state, error):

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

363

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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str(error))

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raise AvahiGroupError("State changed: {!s}".format(error))

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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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223

def cleanup(self):

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

377

225

if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

381

dbus.exceptions.DBusException):

229

dbus.exceptions.DBusException) as e:

382

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pass

383

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self.group = None

384

232

self.remove()

385

386

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def server_state_changed(self, state, error=None):

387

234

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

388

235

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

389

bad_states = {

390

avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

392

avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

394

}

236

bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

241

avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

395

243

if state in bad_states:

396

244

if bad_states[state] is not None:

397

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if error is None:

400

248

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

401

249

self.cleanup()

402

250

elif state == avahi.SERVER_RUNNING:

403

try:

404

self.add()

405

except dbus.exceptions.DBusException as error:

406

if (error.get_dbus_name()

407

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

408

logger.info("Local Zeroconf service name"

409

" collision.")

410

return self.rename(remove=False)

411

else:

412

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

413

self.cleanup()

414

os._exit(1)

251

self.add()

415

252

else:

416

253

if error is None:

417

254

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

418

255

else:

419

256

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

420

421

257

def activate(self):

422

258

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

423

259

if self.server is None:

427

263

follow_name_owner_changes=True),

428

264

avahi.DBUS_INTERFACE_SERVER)

429

265

self.server.connect_to_signal("StateChanged",

430

self.server_state_changed)

266

self.server_state_changed)

431

267

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

432

268

433

434

269

class AvahiServiceToSyslog(AvahiService):

435

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

270

def rename(self):

436

271

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

437

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

438

syslogger.setFormatter(logging.Formatter(

439

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

440

.format(self.name)))

272

ret = AvahiService.rename(self)

273

syslogger.setFormatter(logging.Formatter

274

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

275

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

276

% self.name))

441

277

return ret

442

278

443

# Pretend that we have a GnuTLS module

444

class GnuTLS(object):

445

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

446

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

447

448

_library = ctypes.cdll.LoadLibrary(

449

ctypes.util.find_library("gnutls"))

450

_need_version = "3.3.0"

451

def __init__(self):

452

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

453

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

454

# happens.

455

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

456

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

457

.format(self._need_version))

458

459

# Unless otherwise indicated, the constants and types below are

460

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

461

462

# Constants

463

E_SUCCESS = 0

464

E_INTERRUPTED = -52

465

E_AGAIN = -28

466

CRT_OPENPGP = 2

467

CLIENT = 2

468

SHUT_RDWR = 0

469

CRD_CERTIFICATE = 1

470

E_NO_CERTIFICATE_FOUND = -49

471

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

472

473

# Types

474

class session_int(ctypes.Structure):

475

_fields_ = []

476

session_t = ctypes.POINTER(session_int)

477

class certificate_credentials_st(ctypes.Structure):

478

_fields_ = []

479

certificate_credentials_t = ctypes.POINTER(

480

certificate_credentials_st)

481

certificate_type_t = ctypes.c_int

482

class datum_t(ctypes.Structure):

483

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

484

('size', ctypes.c_uint)]

485

class openpgp_crt_int(ctypes.Structure):

486

_fields_ = []

487

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

488

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

489

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

490

credentials_type_t = ctypes.c_int #

491

transport_ptr_t = ctypes.c_void_p

492

close_request_t = ctypes.c_int

493

494

# Exceptions

495

class Error(Exception):

496

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

497

# exception might be raised from within GnuTLS.__init__,

498

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

499

# global variable has happened.

500

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

501

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

502

# code is passed, convert it to a string with

503

# gnutls.strerror()

504

self.code = code

505

if message is None and code is not None:

506

message = GnuTLS.strerror(code)

507

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

508

message, *args)

509

510

class CertificateSecurityError(Error):

511

pass

512

513

# Classes

514

class Credentials(object):

515

def __init__(self):

516

self._c_object = gnutls.certificate_credentials_t()

517

gnutls.certificate_allocate_credentials(

518

ctypes.byref(self._c_object))

519

self.type = gnutls.CRD_CERTIFICATE

520

521

def __del__(self):

522

gnutls.certificate_free_credentials(self._c_object)

523

524

class ClientSession(object):

525

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

526

self._c_object = gnutls.session_t()

527

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

528

gnutls.set_default_priority(self._c_object)

529

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

530

gnutls.handshake_set_private_extensions(self._c_object,

531

True)

532

self.socket = socket

533

if credentials is None:

534

credentials = gnutls.Credentials()

535

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

536

ctypes.cast(credentials._c_object,

537

ctypes.c_void_p))

538

self.credentials = credentials

539

540

def __del__(self):

541

gnutls.deinit(self._c_object)

542

543

def handshake(self):

544

return gnutls.handshake(self._c_object)

545

546

def send(self, data):

547

data = bytes(data)

548

data_len = len(data)

549

while data_len > 0:

550

data_len -= gnutls.record_send(self._c_object,

551

data[-data_len:],

552

data_len)

553

554

def bye(self):

555

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

556

557

# Error handling functions

558

def _error_code(result):

559

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

560

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

561

if result >= 0:

562

return result

563

if result == gnutls.E_NO_CERTIFICATE_FOUND:

564

raise gnutls.CertificateSecurityError(code = result)

565

raise gnutls.Error(code = result)

566

567

def _retry_on_error(result, func, arguments):

568

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

569

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

570

while result < 0:

571

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

572

return _error_code(result)

573

result = func(*arguments)

574

return result

575

576

# Unless otherwise indicated, the function declarations below are

577

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

578

579

# Functions

580

priority_set_direct = _library.gnutls_priority_set_direct

581

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

582

ctypes.POINTER(ctypes.c_char_p)]

583

priority_set_direct.restype = _error_code

584

585

init = _library.gnutls_init

586

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

587

init.restype = _error_code

588

589

set_default_priority = _library.gnutls_set_default_priority

590

set_default_priority.argtypes = [session_t]

591

set_default_priority.restype = _error_code

592

593

record_send = _library.gnutls_record_send

594

record_send.argtypes = [session_t, ctypes.c_void_p,

595

ctypes.c_size_t]

596

record_send.restype = ctypes.c_ssize_t

597

record_send.errcheck = _retry_on_error

598

599

certificate_allocate_credentials = (

600

_library.gnutls_certificate_allocate_credentials)

601

certificate_allocate_credentials.argtypes = [

602

ctypes.POINTER(certificate_credentials_t)]

603

certificate_allocate_credentials.restype = _error_code

604

605

certificate_free_credentials = (

606

_library.gnutls_certificate_free_credentials)

607

certificate_free_credentials.argtypes = [certificate_credentials_t]

608

certificate_free_credentials.restype = None

609

610

handshake_set_private_extensions = (

611

_library.gnutls_handshake_set_private_extensions)

612

handshake_set_private_extensions.argtypes = [session_t,

613

ctypes.c_int]

614

handshake_set_private_extensions.restype = None

615

616

credentials_set = _library.gnutls_credentials_set

617

credentials_set.argtypes = [session_t, credentials_type_t,

618

ctypes.c_void_p]

619

credentials_set.restype = _error_code

620

621

strerror = _library.gnutls_strerror

622

strerror.argtypes = [ctypes.c_int]

623

strerror.restype = ctypes.c_char_p

624

625

certificate_type_get = _library.gnutls_certificate_type_get

626

certificate_type_get.argtypes = [session_t]

627

certificate_type_get.restype = _error_code

628

629

certificate_get_peers = _library.gnutls_certificate_get_peers

630

certificate_get_peers.argtypes = [session_t,

631

ctypes.POINTER(ctypes.c_uint)]

632

certificate_get_peers.restype = ctypes.POINTER(datum_t)

633

634

global_set_log_level = _library.gnutls_global_set_log_level

635

global_set_log_level.argtypes = [ctypes.c_int]

636

global_set_log_level.restype = None

637

638

global_set_log_function = _library.gnutls_global_set_log_function

639

global_set_log_function.argtypes = [log_func]

640

global_set_log_function.restype = None

641

642

deinit = _library.gnutls_deinit

643

deinit.argtypes = [session_t]

644

deinit.restype = None

645

646

handshake = _library.gnutls_handshake

647

handshake.argtypes = [session_t]

648

handshake.restype = _error_code

649

handshake.errcheck = _retry_on_error

650

651

transport_set_ptr = _library.gnutls_transport_set_ptr

652

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

653

transport_set_ptr.restype = None

654

655

bye = _library.gnutls_bye

656

bye.argtypes = [session_t, close_request_t]

657

bye.restype = _error_code

658

bye.errcheck = _retry_on_error

659

660

check_version = _library.gnutls_check_version

661

check_version.argtypes = [ctypes.c_char_p]

662

check_version.restype = ctypes.c_char_p

663

664

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

665

666

openpgp_crt_init = _library.gnutls_openpgp_crt_init

667

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

668

openpgp_crt_init.restype = _error_code

669

670

openpgp_crt_import = _library.gnutls_openpgp_crt_import

671

openpgp_crt_import.argtypes = [openpgp_crt_t,

672

ctypes.POINTER(datum_t),

673

openpgp_crt_fmt_t]

674

openpgp_crt_import.restype = _error_code

675

676

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

677

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

678

ctypes.POINTER(ctypes.c_uint)]

679

openpgp_crt_verify_self.restype = _error_code

680

681

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

682

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

683

openpgp_crt_deinit.restype = None

684

685

openpgp_crt_get_fingerprint = (

686

_library.gnutls_openpgp_crt_get_fingerprint)

687

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

688

ctypes.c_void_p,

689

ctypes.POINTER(

690

ctypes.c_size_t)]

691

openpgp_crt_get_fingerprint.restype = _error_code

692

693

# Remove non-public functions

694

del _error_code, _retry_on_error

695

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

696

gnutls = GnuTLS()

697

698

def call_pipe(connection, # : multiprocessing.Connection

699

func, *args, **kwargs):

700

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

701

702

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

703

return value on the provided multiprocessing.Connection.

704

"""

705

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

706

connection.close()

707

279

def _timedelta_to_milliseconds(td):

280

"Convert a datetime.timedelta() to milliseconds"

281

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

282

+ (td.seconds * 1000)

283

+ (td.microseconds // 1000))

284

708

285

class Client(object):

709

286

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

710

287

711

288

Attributes:

712

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

289

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

713

290

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

714

291

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

715

292

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

716

293

to see if the client lives.

717

294

'None' if no process is running.

718

checker_callback_tag: a GObject event source tag, or None

295

checker_callback_tag: a gobject event source tag, or None

719

296

checker_command: string; External command which is run to check

720

297

if client lives. %() expansions are done at

721

298

runtime with vars(self) as dict, so that for

722

299

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

723

checker_initiator_tag: a GObject event source tag, or None

300

checker_initiator_tag: a gobject event source tag, or None

724

301

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

725

302

client_structure: Object describing what attributes a client has

726

303

and is used for storing the client at exit

727

304

current_checker_command: string; current running checker_command

728

disable_initiator_tag: a GObject event source tag, or None

305

disable_initiator_tag: a gobject event source tag, or None

729

306

enabled: bool()

730

307

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

731

308

uniquely identify the client

734

311

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

735

312

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

736

313

last_checker_status: integer between 0 and 255 reflecting exit

737

status of last checker. -1 reflects crashed

738

checker, -2 means no checker completed yet.

739

last_checker_signal: The signal which killed the last checker, if

740

last_checker_status is -1

741

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

314

status of last checker. -1 reflect crashed

315

checker, or None.

316

last_enabled: datetime.datetime(); (UTC)

742

317

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

743

318

D-Bus identifiers

744

319

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

745

320

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

746

321

until this client is disabled

747

extended_timeout: extra long timeout when secret has been sent

322

extended_timeout: extra long timeout when password has been sent

748

323

runtime_expansions: Allowed attributes for runtime expansion.

749

324

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

750

325

disabled, or None

751

server_settings: The server_settings dict from main()

752

326

"""

753

327

754

328

runtime_expansions = ("approval_delay", "approval_duration",

755

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

756

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

757

"last_approval_request", "last_checked_ok",

329

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

330

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

758

331

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

759

client_defaults = {

760

"timeout": "PT5M",

761

"extended_timeout": "PT15M",

762

"interval": "PT2M",

763

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

764

"host": "",

765

"approval_delay": "PT0S",

766

"approval_duration": "PT1S",

767

"approved_by_default": "True",

768

"enabled": "True",

769

}

770

771

@staticmethod

772

def config_parser(config):

773

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

774

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

775

with exceptions for any special settings as defined above.

776

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

777

value given the same arguments.

778

"""

779

settings = {}

780

for client_name in config.sections():

781

section = dict(config.items(client_name))

782

client = settings[client_name] = {}

783

784

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

785

# Reformat values from string types to Python types

786

client["approved_by_default"] = config.getboolean(

787

client_name, "approved_by_default")

788

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

789

"enabled")

790

791

# Uppercase and remove spaces from fingerprint for later

792

# comparison purposes with return value from the

793

# fingerprint() function

794

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

795

.replace(" ", ""))

796

if "secret" in section:

797

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

798

elif "secfile" in section:

799

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

800

(section["secfile"])),

801

"rb") as secfile:

802

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

803

else:

804

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

805

.format(section))

806

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

807

client["extended_timeout"] = string_to_delta(

808

section["extended_timeout"])

809

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

810

client["approval_delay"] = string_to_delta(

811

section["approval_delay"])

812

client["approval_duration"] = string_to_delta(

813

section["approval_duration"])

814

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

815

client["last_approval_request"] = None

816

client["last_checked_ok"] = None

817

client["last_checker_status"] = -2

818

819

return settings

820

821

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

332

333

def timeout_milliseconds(self):

334

"Return the 'timeout' attribute in milliseconds"

335

return _timedelta_to_milliseconds(self.timeout)

336

337

def extended_timeout_milliseconds(self):

338

"Return the 'extended_timeout' attribute in milliseconds"

339

return _timedelta_to_milliseconds(self.extended_timeout)

340

341

def interval_milliseconds(self):

342

"Return the 'interval' attribute in milliseconds"

343

return _timedelta_to_milliseconds(self.interval)

344

345

def approval_delay_milliseconds(self):

346

return _timedelta_to_milliseconds(self.approval_delay)

347

348

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

349

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

350

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

351

attribute."""

822

352

self.name = name

823

if server_settings is None:

824

server_settings = {}

825

self.server_settings = server_settings

826

# adding all client settings

827

for setting, value in settings.items():

828

setattr(self, setting, value)

829

830

if self.enabled:

831

if not hasattr(self, "last_enabled"):

832

self.last_enabled = datetime.datetime.utcnow()

833

if not hasattr(self, "expires"):

834

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

835

+ self.timeout)

836

else:

837

self.last_enabled = None

838

self.expires = None

839

353

if config is None:

354

config = {}

840

355

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

356

# Uppercase and remove spaces from fingerprint for later

357

# comparison purposes with return value from the fingerprint()

358

# function

359

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

360

.replace(" ", ""))

841

361

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

842

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

843

datetime.datetime.utcnow())

844

845

# attributes specific for this server instance

362

if "secret" in config:

363

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

364

elif "secfile" in config:

365

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

366

(config["secfile"])),

367

"rb") as secfile:

368

self.secret = secfile.read()

369

else:

370

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

371

% self.name)

372

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

373

self.created = datetime.datetime.utcnow()

374

self.enabled = True

375

self.last_approval_request = None

376

self.last_enabled = datetime.datetime.utcnow()

377

self.last_checked_ok = None

378

self.last_checker_status = None

379

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

380

self.extended_timeout = string_to_delta(config

381

["extended_timeout"])

382

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

846

383

self.checker = None

847

384

self.checker_initiator_tag = None

848

385

self.disable_initiator_tag = None

386

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

849

387

self.checker_callback_tag = None

388

self.checker_command = config["checker"]

850

389

self.current_checker_command = None

851

self.approved = None

390

self._approved = None

391

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

392

True)

852

393

self.approvals_pending = 0

853

self.changedstate = multiprocessing_manager.Condition(

854

multiprocessing_manager.Lock())

855

self.client_structure = [attr

856

for attr in self.__dict__.iterkeys()

394

self.approval_delay = string_to_delta(

395

config["approval_delay"])

396

self.approval_duration = string_to_delta(

397

config["approval_duration"])

398

self.changedstate = (multiprocessing_manager

399

.Condition(multiprocessing_manager

400

.Lock()))

401

self.client_structure = [attr for attr

402

in self.__dict__.iterkeys()

857

403

if not attr.startswith("_")]

858

404

self.client_structure.append("client_structure")

859

860

for name, t in inspect.getmembers(

861

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

405

406

407

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

408

lambda obj:

409

isinstance(obj,

410

property)):

862

411

if not name.startswith("_"):

863

412

self.client_structure.append(name)

864

413

872

421

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

873

422

# Already enabled

874

423

return

424

self.send_changedstate()

875

425

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

876

426

self.enabled = True

877

427

self.last_enabled = datetime.datetime.utcnow()

878

428

self.init_checker()

879

self.send_changedstate()

880

429

881

430

def disable(self, quiet=True):

882

431

"""Disable this client."""

883

432

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

884

433

return False

885

434

if not quiet:

435

self.send_changedstate()

436

if not quiet:

886

437

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

887

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

888

GObject.source_remove(self.disable_initiator_tag)

438

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

439

gobject.source_remove(self.disable_initiator_tag)

889

440

self.disable_initiator_tag = None

890

441

self.expires = None

891

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

892

GObject.source_remove(self.checker_initiator_tag)

442

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

443

gobject.source_remove(self.checker_initiator_tag)

893

444

self.checker_initiator_tag = None

894

445

self.stop_checker()

895

446

self.enabled = False

896

if not quiet:

897

self.send_changedstate()

898

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

447

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

899

448

return False

900

449

901

450

def __del__(self):

902

451

self.disable()

903

452

904

453

def init_checker(self):

905

454

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

906

455

# and every interval from then on.

907

if self.checker_initiator_tag is not None:

908

GObject.source_remove(self.checker_initiator_tag)

909

self.checker_initiator_tag = GObject.timeout_add(

910

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

911

self.start_checker)

456

self.checker_initiator_tag = (gobject.timeout_add

457

(self.interval_milliseconds(),

458

self.start_checker))

912

459

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

913

if self.disable_initiator_tag is not None:

914

GObject.source_remove(self.disable_initiator_tag)

915

self.disable_initiator_tag = GObject.timeout_add(

916

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

460

self.disable_initiator_tag = (gobject.timeout_add

461

(self.timeout_milliseconds(),

462

self.disable))

917

463

# Also start a new checker *right now*.

918

464

self.start_checker()

919

920

def checker_callback(self, source, condition, connection,

921

command):

465

466

467

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

922

468

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

923

469

self.checker_callback_tag = None

924

470

self.checker = None

925

# Read return code from connection (see call_pipe)

926

returncode = connection.recv()

927

connection.close()

928

929

if returncode >= 0:

930

self.last_checker_status = returncode

931

self.last_checker_signal = None

471

if os.WIFEXITED(condition):

472

self.last_checker_status = os.WEXITSTATUS(condition)

932

473

if self.last_checker_status == 0:

933

474

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

934

475

vars(self))

935

476

self.checked_ok()

936

477

else:

937

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

478

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

479

vars(self))

938

480

else:

939

481

self.last_checker_status = -1

940

self.last_checker_signal = -returncode

941

482

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

942

483

vars(self))

943

return False

944

945

def checked_ok(self):

946

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

947

self.last_checked_ok = datetime.datetime.utcnow()

948

self.last_checker_status = 0

949

self.last_checker_signal = None

950

self.bump_timeout()

951

952

def bump_timeout(self, timeout=None):

953

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

484

485

def checked_ok(self, timeout=None):

486

"""Bump up the timeout for this client.

487

488

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

489

alive and well.

490

"""

954

491

if timeout is None:

955

492

timeout = self.timeout

493

self.last_checked_ok = datetime.datetime.utcnow()

956

494

if self.disable_initiator_tag is not None:

957

GObject.source_remove(self.disable_initiator_tag)

958

self.disable_initiator_tag = None

495

gobject.source_remove(self.disable_initiator_tag)

959

496

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

960

self.disable_initiator_tag = GObject.timeout_add(

961

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

497

self.disable_initiator_tag = (gobject.timeout_add

498

(_timedelta_to_milliseconds

499

(timeout), self.disable))

962

500

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

963

501

964

502

def need_approval(self):

970

508

If a checker already exists, leave it running and do

971

509

nothing."""

972

510

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

973

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

974

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

975

# would inevitably timeout, since no checker would get a

976

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

511

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

512

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

513

# client would inevitably timeout, since no checker would get

514

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

977

515

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

978

516

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

979

517

# should be.

980

518

981

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

982

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

983

self.checker.join()

984

self.checker = None

519

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

520

try:

521

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

522

except (AttributeError, OSError) as error:

523

if (isinstance(error, OSError)

524

and error.errno != errno.ECHILD):

525

raise error

526

else:

527

if pid:

528

logger.warning("Checker was a zombie")

529

gobject.source_remove(self.checker_callback_tag)

530

self.checker_callback(pid, status,

531

self.current_checker_command)

985

532

# Start a new checker if needed

986

533

if self.checker is None:

987

# Escape attributes for the shell

988

escaped_attrs = {

989

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

990

for attr in self.runtime_expansions }

991

534

try:

992

command = self.checker_command % escaped_attrs

993

except TypeError as error:

994

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

995

self.checker_command,

996

exc_info=error)

997

return True # Try again later

535

# In case checker_command has exactly one % operator

536

command = self.checker_command % self.host

537

except TypeError:

538

# Escape attributes for the shell

539

escaped_attrs = dict(

540

(attr,

541

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

542

errors=

543

'replace')))

544

for attr in

545

self.runtime_expansions)

546

547

try:

548

command = self.checker_command % escaped_attrs

549

except TypeError as error:

550

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

551

' %s', self.checker_command, error)

552

return True # Try again later

998

553

self.current_checker_command = command

999

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

1000

self.name)

1001

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

1002

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

1003

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

1004

# always replaced by /dev/null.)

1005

# The exception is when not debugging but nevertheless

1006

# running in the foreground; use the previously

1007

# created wnull.

1008

popen_args = { "close_fds": True,

1009

"shell": True,

1010

"cwd": "/" }

1011

if (not self.server_settings["debug"]

1012

and self.server_settings["foreground"]):

1013

popen_args.update({"stdout": wnull,

1014

"stderr": wnull })

1015

pipe = multiprocessing.Pipe(duplex = False)

1016

self.checker = multiprocessing.Process(

1017

target = call_pipe,

1018

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

1019

kwargs = popen_args)

1020

self.checker.start()

1021

self.checker_callback_tag = GObject.io_add_watch(

1022

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

1023

self.checker_callback, pipe[0], command)

1024

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

554

try:

555

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

556

command, self.name)

557

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

558

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

559

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

560

# always replaced by /dev/null.)

561

self.checker = subprocess.Popen(command,

562

close_fds=True,

563

shell=True, cwd="/")

564

self.checker_callback_tag = (gobject.child_watch_add

565

(self.checker.pid,

566

self.checker_callback,

567

data=command))

568

# The checker may have completed before the gobject

569

# watch was added. Check for this.

570

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

571

if pid:

572

gobject.source_remove(self.checker_callback_tag)

573

self.checker_callback(pid, status, command)

574

except OSError as error:

575

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

576

error)

577

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

1025

578

return True

1026

579

1027

580

def stop_checker(self):

1028

581

"""Force the checker process, if any, to stop."""

1029

582

if self.checker_callback_tag:

1030

GObject.source_remove(self.checker_callback_tag)

583

gobject.source_remove(self.checker_callback_tag)

1031

584

self.checker_callback_tag = None

1032

585

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

1033

586

return

1034

587

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

1035

self.checker.terminate()

588

try:

589

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

590

#time.sleep(0.5)

591

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

592

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

593

except OSError as error:

594

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

595

raise

1036

596

self.checker = None

1037

597

1038

1039

def dbus_service_property(dbus_interface,

1040

signature="v",

1041

access="readwrite",

1042

byte_arrays=False):

598

# Encrypts a client secret and stores it in a varible

599

# encrypted_secret

600

def encrypt_secret(self, key):

601

# Encryption-key need to be of a specific size, so we hash

602

# supplied key

603

hasheng = hashlib.sha256()

604

hasheng.update(key)

605

encryptionkey = hasheng.digest()

606

607

# Create validation hash so we know at decryption if it was

608

# sucessful

609

hasheng = hashlib.sha256()

610

hasheng.update(self.secret)

611

validationhash = hasheng.digest()

612

613

# Encrypt secret

614

iv = os.urandom(Crypto.Cipher.AES.block_size)

615

ciphereng = Crypto.Cipher.AES.new(encryptionkey,

616

Crypto.Cipher.AES.MODE_CFB, iv)

617

ciphertext = ciphereng.encrypt(validationhash+self.secret)

618

self.encrypted_secret = (ciphertext, iv)

619

620

# Decrypt a encrypted client secret

621

def decrypt_secret(self, key):

622

# Decryption-key need to be of a specific size, so we hash

623

# supplied key

624

hasheng = hashlib.sha256()

625

hasheng.update(key)

626

encryptionkey = hasheng.digest()

627

628

# Decrypt encrypted secret

629

ciphertext, iv = self.encrypted_secret

630

ciphereng = Crypto.Cipher.AES.new(encryptionkey,

631

Crypto.Cipher.AES.MODE_CFB, iv)

632

plain = ciphereng.decrypt(ciphertext)

633

634

# Validate decrypted secret to know if it was succesful

635

hasheng = hashlib.sha256()

636

validationhash = plain[:hasheng.digest_size]

637

secret = plain[hasheng.digest_size:]

638

hasheng.update(secret)

639

640

# If validation fails, we use key as new secret. Otherwise, we

641

# use the decrypted secret

642

if hasheng.digest() == validationhash:

643

self.secret = secret

644

else:

645

self.secret = key

646

del self.encrypted_secret

647

648

649

def dbus_service_property(dbus_interface, signature="v",

650

access="readwrite", byte_arrays=False):

1043

651

"""Decorators for marking methods of a DBusObjectWithProperties to

1044

652

become properties on the D-Bus.

1045

653

1054

662

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

1055

663

if byte_arrays and signature != "ay":

1056

664

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

1057

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

1058

665

" signature %r" % signature)

1059

666

def decorator(func):

1060

667

func._dbus_is_property = True

1061

668

func._dbus_interface = dbus_interface

1066

673

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

1067

674

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1068

675

return func

1069

1070

return decorator

1071

1072

1073

def dbus_interface_annotations(dbus_interface):

1074

"""Decorator for marking functions returning interface annotations

1075

1076

Usage:

1077

1078

@dbus_interface_annotations("org.example.Interface")

1079

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

1080

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

1081

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

1082

"false"}

1083

"""

1084

1085

def decorator(func):

1086

func._dbus_is_interface = True

1087

func._dbus_interface = dbus_interface

1088

func._dbus_name = dbus_interface

1089

return func

1090

1091

return decorator

1092

1093

1094

def dbus_annotations(annotations):

1095

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

1096

Usage:

1097

1098

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

1099

"org.freedesktop.DBus.Property."

1100

"EmitsChangedSignal": "false"})

1101

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

1102

access="r")

1103

def Property_dbus_property(self):

1104

return dbus.Boolean(False)

1105

1106

See also the DBusObjectWithAnnotations class.

1107

"""

1108

1109

def decorator(func):

1110

func._dbus_annotations = annotations

1111

return func

1112

1113

676

return decorator

1114

677

1115

678

1116

679

class DBusPropertyException(dbus.exceptions.DBusException):

1117

680

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

1118

681

"""

1119

pass

682

def __unicode__(self):

683

return unicode(str(self))

1120

684

1121

685

1122

686

class DBusPropertyAccessException(DBusPropertyException):

1131

695

pass

1132

696

1133

697

1134

class DBusObjectWithAnnotations(dbus.service.Object):

1135

"""A D-Bus object with annotations.

1136

1137

Classes inheriting from this can use the dbus_annotations

1138

decorator to add annotations to methods or signals.

1139

"""

1140

1141

@staticmethod

1142

def _is_dbus_thing(thing):

1143

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

1144

1145

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

1146

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

1147

"""

1148

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

1149

False)

1150

1151

def _get_all_dbus_things(self, thing):

1152

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

1153

"""

1154

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

1155

athing.__get__(self))

1156

for cls in self.__class__.__mro__

1157

for name, athing in

1158

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

1159

1160

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1161

out_signature = "s",

1162

path_keyword = 'object_path',

1163

connection_keyword = 'connection')

1164

def Introspect(self, object_path, connection):

1165

"""Overloading of standard D-Bus method.

1166

1167

Inserts annotation tags on methods and signals.

1168

"""

1169

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

1170

connection)

1171

try:

1172

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

1173

1174

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

1175

# Add annotation tags

1176

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

1177

for tag in if_tag.getElementsByTagName(typ):

1178

annots = dict()

1179

for name, prop in (self.

1180

_get_all_dbus_things(typ)):

1181

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

1182

and prop._dbus_interface

1183

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

1184

annots.update(getattr(

1185

prop, "_dbus_annotations", {}))

1186

for name, value in annots.items():

1187

ann_tag = document.createElement(

1188

"annotation")

1189

ann_tag.setAttribute("name", name)

1190

ann_tag.setAttribute("value", value)

1191

tag.appendChild(ann_tag)

1192

# Add interface annotation tags

1193

for annotation, value in dict(

1194

itertools.chain.from_iterable(

1195

annotations().items()

1196

for name, annotations

1197

in self._get_all_dbus_things("interface")

1198

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

1199

)).items():

1200

ann_tag = document.createElement("annotation")

1201

ann_tag.setAttribute("name", annotation)

1202

ann_tag.setAttribute("value", value)

1203

if_tag.appendChild(ann_tag)

1204

# Fix argument name for the Introspect method itself

1205

if (if_tag.getAttribute("name")

1206

== dbus.INTROSPECTABLE_IFACE):

1207

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

1208

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

1209

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

1210

if (arg.getAttribute("direction")

1211

== "out"):

1212

arg.setAttribute("name",

1213

"xml_data")

1214

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

1215

document.unlink()

1216

except (AttributeError, xml.dom.DOMException,

1217

xml.parsers.expat.ExpatError) as error:

1218

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

1219

exc_info=error)

1220

return xmlstring

1221

1222

1223

class DBusObjectWithProperties(DBusObjectWithAnnotations):

698

class DBusObjectWithProperties(dbus.service.Object):

1224

699

"""A D-Bus object with properties.

1225

700

1226

701

Classes inheriting from this can use the dbus_service_property

1228

703

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

1229

704

"""

1230

705

706

@staticmethod

707

def _is_dbus_property(obj):

708

return getattr(obj, "_dbus_is_property", False)

709

710

def _get_all_dbus_properties(self):

711

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

712

"""

713

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

714

for cls in self.__class__.__mro__

715

for name, prop in

716

inspect.getmembers(cls, self._is_dbus_property))

717

1231

718

def _get_dbus_property(self, interface_name, property_name):

1232

719

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

1233

720

property with the specified name and interface.

1234

721

"""

1235

for cls in self.__class__.__mro__:

1236

for name, value in inspect.getmembers(

1237

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

722

for cls in self.__class__.__mro__:

723

for name, value in (inspect.getmembers

724

(cls, self._is_dbus_property)):

1238

725

if (value._dbus_name == property_name

1239

726

and value._dbus_interface == interface_name):

1240

727

return value.__get__(self)

1241

728

1242

729

# No such property

1243

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

1244

self.dbus_object_path, interface_name, property_name))

1245

1246

@classmethod

1247

def _get_all_interface_names(cls):

1248

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

1249

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

1250

"_dbus_interface", None)

1251

for x in (inspect.getmro(cls))

1252

for attr in dir(x))

1253

if name is not None)

1254

1255

@dbus.service.method(dbus.PROPERTIES_IFACE,

1256

in_signature="ss",

730

raise DBusPropertyNotFound(self.dbus_object_path + ":"

731

+ interface_name + "."

732

+ property_name)

733

734

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

1257

735

out_signature="v")

1258

736

def Get(self, interface_name, property_name):

1259

737

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

1277

755

# The byte_arrays option is not supported yet on

1278

756

# signatures other than "ay".

1279

757

if prop._dbus_signature != "ay":

1280

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

1281

"'ay' signature {!r}"

1282

.format(prop._dbus_signature))

1283

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

1284

for byte in value))

758

raise ValueError

759

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

760

for byte in value))

1285

761

prop(value)

1286

762

1287

@dbus.service.method(dbus.PROPERTIES_IFACE,

1288

in_signature="s",

763

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

1289

764

out_signature="a{sv}")

1290

765

def GetAll(self, interface_name):

1291

766

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

1293

768

1294

769

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

1295

770

"""

1296

properties = {}

1297

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

771

all = {}

772

for name, prop in self._get_all_dbus_properties():

1298

773

if (interface_name

1299

774

and interface_name != prop._dbus_interface):

1300

775

# Interface non-empty but did not match

1304

779

continue

1305

780

value = prop()

1306

781

if not hasattr(value, "variant_level"):

1307

properties[name] = value

782

all[name] = value

1308

783

continue

1309

properties[name] = type(value)(

1310

value, variant_level = value.variant_level + 1)

1311

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

1312

1313

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

1314

def PropertiesChanged(self, interface_name, changed_properties,

1315

invalidated_properties):

1316

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

1317

standard.

1318

"""

1319

pass

784

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

785

value.variant_level+1)

786

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

1320

787

1321

788

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1322

789

out_signature="s",

1323

790

path_keyword='object_path',

1324

791

connection_keyword='connection')

1325

792

def Introspect(self, object_path, connection):

1326

"""Overloading of standard D-Bus method.

1327

1328

Inserts property tags and interface annotation tags.

793

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

1329

794

"""

1330

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1331

object_path,

1332

connection)

795

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

796

connection)

1333

797

try:

1334

798

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

1335

1336

799

def make_tag(document, name, prop):

1337

800

e = document.createElement("property")

1338

801

e.setAttribute("name", name)

1339

802

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

1340

803

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

1341

804

return e

1342

1343

805

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

1344

# Add property tags

1345

806

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

1346

807

for name, prop

1347

in self._get_all_dbus_things("property")

808

in self._get_all_dbus_properties()

1348

809

if prop._dbus_interface

1349

810

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

1350

811

if_tag.appendChild(tag)

1351

# Add annotation tags for properties

1352

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

1353

annots = dict()

1354

for name, prop in self._get_all_dbus_things(

1355

"property"):

1356

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

1357

and prop._dbus_interface

1358

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

1359

annots.update(getattr(

1360

prop, "_dbus_annotations", {}))

1361

for name, value in annots.items():

1362

ann_tag = document.createElement(

1363

"annotation")

1364

ann_tag.setAttribute("name", name)

1365

ann_tag.setAttribute("value", value)

1366

tag.appendChild(ann_tag)

1367

812

# Add the names to the return values for the

1368

813

# "org.freedesktop.DBus.Properties" methods

1369

814

if (if_tag.getAttribute("name")

1384

829

except (AttributeError, xml.dom.DOMException,

1385

830

xml.parsers.expat.ExpatError) as error:

1386

831

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

1387

exc_info=error)

1388

return xmlstring

1389

1390

try:

1391

dbus.OBJECT_MANAGER_IFACE

1392

except AttributeError:

1393

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

1394

1395

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1396

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

1397

1398

Classes inheriting from this exposes the standard

1399

GetManagedObjects call and the InterfacesAdded and

1400

InterfacesRemoved signals on the standard

1401

"org.freedesktop.DBus.ObjectManager" interface.

1402

1403

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

1404

manually.

1405

"""

1406

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1407

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

1408

def GetManagedObjects(self):

1409

"""This function must be overridden"""

1410

raise NotImplementedError()

1411

1412

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1413

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

1414

def InterfacesAdded(self, object_path, interfaces_and_properties):

1415

pass

1416

1417

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

1418

def InterfacesRemoved(self, object_path, interfaces):

1419

pass

1420

1421

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1422

out_signature = "s",

1423

path_keyword = 'object_path',

1424

connection_keyword = 'connection')

1425

def Introspect(self, object_path, connection):

1426

"""Overloading of standard D-Bus method.

1427

1428

Override return argument name of GetManagedObjects to be

1429

"objpath_interfaces_and_properties"

1430

"""

1431

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1432

object_path,

1433

connection)

1434

try:

1435

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

1436

1437

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

1438

# Fix argument name for the GetManagedObjects method

1439

if (if_tag.getAttribute("name")

1440

== dbus.OBJECT_MANAGER_IFACE):

1441

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

1442

if (cn.getAttribute("name")

1443

== "GetManagedObjects"):

1444

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

1445

if (arg.getAttribute("direction")

1446

== "out"):

1447

arg.setAttribute(

1448

"name",

1449

"objpath_interfaces"

1450

"_and_properties")

1451

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

1452

document.unlink()

1453

except (AttributeError, xml.dom.DOMException,

1454

xml.parsers.expat.ExpatError) as error:

1455

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

1456

exc_info = error)

1457

return xmlstring

1458

1459

def datetime_to_dbus(dt, variant_level=0):

832

error)

833

return xmlstring

834

835

836

def datetime_to_dbus (dt, variant_level=0):

1460

837

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

1461

838

if dt is None:

1462

839

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

1463

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

1464

1465

1466

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1467

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

1468

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

1469

interface names according to the "alt_interface_names" mapping.

1470

Usage:

1471

1472

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

1473

"net.example.AlternateInterface"})

1474

class SampleDBusObject(dbus.service.Object):

1475

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

1476

def SampleDBusMethod():

1477

pass

1478

1479

The above "SampleDBusMethod" on "SampleDBusObject" will be

1480

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

1481

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

1482

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

1483

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

1484

1485

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

1486

(from DBusObjectWithProperties) and interfaces (from the

1487

dbus_interface_annotations decorator).

840

return dbus.String(dt.isoformat(),

841

variant_level=variant_level)

842

843

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

844

.__metaclass__):

845

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

846

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

1488

847

"""

1489

1490

def wrapper(cls):

1491

for orig_interface_name, alt_interface_name in (

1492

alt_interface_names.items()):

1493

attr = {}

1494

interface_names = set()

1495

# Go though all attributes of the class

1496

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

848

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

849

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

850

# methods, signals, or properties in them

851

for base in (b for b in bases

852

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

853

# Go though all attributes of the base class

854

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

1497

855

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

1498

856

# with the wrong interface name

1499

857

if (not hasattr(attribute, "_dbus_interface")

1500

or not attribute._dbus_interface.startswith(

1501

orig_interface_name)):

858

or not attribute._dbus_interface

859

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

1502

860

continue

1503

861

# Create an alternate D-Bus interface name based on

1504

862

# the current name

1505

alt_interface = attribute._dbus_interface.replace(

1506

orig_interface_name, alt_interface_name)

1507

interface_names.add(alt_interface)

863

alt_interface = (attribute._dbus_interface

864

.replace("se.recompile.Mandos",

865

"se.bsnet.fukt.Mandos"))

1508

866

# Is this a D-Bus signal?

1509

867

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

1510

if sys.version_info.major == 2:

1511

# Extract the original non-method undecorated

1512

# function by black magic

1513

nonmethod_func = (dict(

868

# Extract the original non-method function by

869

# black magic

870

nonmethod_func = (dict(

1514

871

zip(attribute.func_code.co_freevars,

1515

attribute.__closure__))

1516

["func"].cell_contents)

1517

else:

1518

nonmethod_func = attribute

872

attribute.__closure__))["func"]

873

.cell_contents)

1519

874

# Create a new, but exactly alike, function

1520

875

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

1521

876

# with the alternate D-Bus interface name

1522

if sys.version_info.major == 2:

1523

new_function = types.FunctionType(

1524

nonmethod_func.func_code,

1525

nonmethod_func.func_globals,

1526

nonmethod_func.func_name,

1527

nonmethod_func.func_defaults,

1528

nonmethod_func.func_closure)

1529

else:

1530

new_function = types.FunctionType(

1531

nonmethod_func.__code__,

1532

nonmethod_func.__globals__,

1533

nonmethod_func.__name__,

1534

nonmethod_func.__defaults__,

1535

nonmethod_func.__closure__)

1536

new_function = (dbus.service.signal(

1537

alt_interface,

1538

attribute._dbus_signature)(new_function))

1539

# Copy annotations, if any

1540

try:

1541

new_function._dbus_annotations = dict(

1542

attribute._dbus_annotations)

1543

except AttributeError:

1544

pass

877

new_function = (dbus.service.signal

878

(alt_interface,

879

attribute._dbus_signature)

880

(types.FunctionType(

881

nonmethod_func.func_code,

882

nonmethod_func.func_globals,

883

nonmethod_func.func_name,

884

nonmethod_func.func_defaults,

885

nonmethod_func.func_closure)))

1545

886

# Define a creator of a function to call both the

1546

# original and alternate functions, so both the

1547

# original and alternate signals gets sent when

1548

# the function is called

887

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

888

# signals gets sent when the function is called

1549

889

def fixscope(func1, func2):

1550

890

"""This function is a scope container to pass

1551

891

func1 and func2 to the "call_both" function

1552

892

outside of its arguments"""

1553

1554

@functools.wraps(func2)

1555

893

def call_both(*args, **kwargs):

1556

894

"""This function will emit two D-Bus

1557

895

signals by calling func1 and func2"""

1558

896

func1(*args, **kwargs)

1559

897

func2(*args, **kwargs)

1560

# Make wrapper function look like a D-Bus signal

1561

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

1562

if name.startswith("_dbus_"):

1563

setattr(call_both, name, attr)

1564

1565

898

return call_both

1566

899

# Create the "call_both" function and add it to

1567

900

# the class

1568

attr[attrname] = fixscope(attribute, new_function)

901

attr[attrname] = fixscope(attribute,

902

new_function)

1569

903

# Is this a D-Bus method?

1570

904

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

1571

905

# Create a new, but exactly alike, function

1572

906

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

1573

907

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

1574

908

# to the class.

1575

attr[attrname] = (

1576

dbus.service.method(

1577

alt_interface,

1578

attribute._dbus_in_signature,

1579

attribute._dbus_out_signature)

1580

(types.FunctionType(attribute.func_code,

1581

attribute.func_globals,

1582

attribute.func_name,

1583

attribute.func_defaults,

1584

attribute.func_closure)))

1585

# Copy annotations, if any

1586

try:

1587

attr[attrname]._dbus_annotations = dict(

1588

attribute._dbus_annotations)

1589

except AttributeError:

1590

pass

909

attr[attrname] = (dbus.service.method

910

(alt_interface,

911

attribute._dbus_in_signature,

912

attribute._dbus_out_signature)

913

(types.FunctionType

914

(attribute.func_code,

915

attribute.func_globals,

916

attribute.func_name,

917

attribute.func_defaults,

918

attribute.func_closure)))

1591

919

# Is this a D-Bus property?

1592

920

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

1593

921

# Create a new, but exactly alike, function

1594

922

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

1595

923

# property with the alternate D-Bus interface

1596

924

# name. Add it to the class.

1597

attr[attrname] = (dbus_service_property(

1598

alt_interface, attribute._dbus_signature,

1599

attribute._dbus_access,

1600

attribute._dbus_get_args_options

1601

["byte_arrays"])

1602

(types.FunctionType(

1603

attribute.func_code,

1604

attribute.func_globals,

1605

attribute.func_name,

1606

attribute.func_defaults,

1607

attribute.func_closure)))

1608

# Copy annotations, if any

1609

try:

1610

attr[attrname]._dbus_annotations = dict(

1611

attribute._dbus_annotations)

1612

except AttributeError:

1613

pass

1614

# Is this a D-Bus interface?

1615

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

1616

# Create a new, but exactly alike, function

1617

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

1618

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

1619

# to the class.

1620

attr[attrname] = (

1621

dbus_interface_annotations(alt_interface)

1622

(types.FunctionType(attribute.func_code,

1623

attribute.func_globals,

1624

attribute.func_name,

1625

attribute.func_defaults,

1626

attribute.func_closure)))

1627

if deprecate:

1628

# Deprecate all alternate interfaces

1629

iname="_AlternateDBusNames_interface_annotation{}"

1630

for interface_name in interface_names:

1631

1632

@dbus_interface_annotations(interface_name)

1633

def func(self):

1634

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

1635

"true" }

1636

# Find an unused name

1637

for aname in (iname.format(i)

1638

for i in itertools.count()):

1639

if aname not in attr:

1640

attr[aname] = func

1641

break

1642

if interface_names:

1643

# Replace the class with a new subclass of it with

1644

# methods, signals, etc. as created above.

1645

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

1646

(cls, ), attr)

1647

return cls

1648

1649

return wrapper

1650

1651

1652

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

1653

"se.bsnet.fukt.Mandos"})

925

attr[attrname] = (dbus_service_property

926

(alt_interface,

927

attribute._dbus_signature,

928

attribute._dbus_access,

929

attribute

930

._dbus_get_args_options

931

["byte_arrays"])

932

(types.FunctionType

933

(attribute.func_code,

934

attribute.func_globals,

935

attribute.func_name,

936

attribute.func_defaults,

937

attribute.func_closure)))

938

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

939

1654

940

class ClientDBus(Client, DBusObjectWithProperties):

1655

941

"""A Client class using D-Bus

1656

942

1660

946

"""

1661

947

1662

948

runtime_expansions = (Client.runtime_expansions

1663

+ ("dbus_object_path", ))

1664

1665

_interface = "se.recompile.Mandos.Client"

949

+ ("dbus_object_path",))

1666

950

1667

951

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

1668

952

1669

953

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

1670

954

self.bus = bus

955

self._approvals_pending = 0

1671

956

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

957

self.add_to_dbus()

958

959

def add_to_dbus(self):

1672

960

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

1673

961

# the D-Bus

1674

client_object_name = str(self.name).translate(

962

client_object_name = unicode(self.name).translate(

1675

963

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

1676

964

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

1677

self.dbus_object_path = dbus.ObjectPath(

1678

"/clients/" + client_object_name)

965

self.dbus_object_path = (dbus.ObjectPath

966

("/clients/" + client_object_name))

1679

967

DBusObjectWithProperties.__init__(self, self.bus,

1680

968

self.dbus_object_path)

1681

1682

def notifychangeproperty(transform_func, dbus_name,

1683

type_func=lambda x: x,

1684

variant_level=1,

1685

invalidate_only=False,

1686

_interface=_interface):

969

970

def notifychangeproperty(transform_func,

971

dbus_name, type_func=lambda x: x,

972

variant_level=1):

1687

973

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

1688

974

its changes to DBus.

1689

975

1690

976

transform_fun: Function that takes a value and a variant_level

1691

977

and transforms it to a D-Bus type.

1692

978

dbus_name: D-Bus name of the variable

1694

980

to the D-Bus. Default: no transform

1695

981

variant_level: D-Bus variant level. Default: 1

1696

982

"""

1697

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

1698

983

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

1699

984

def setter(self, value):

1700

985

if hasattr(self, "dbus_object_path"):

1701

986

if (not hasattr(self, attrname) or

1702

987

type_func(getattr(self, attrname, None))

1703

988

!= type_func(value)):

1704

if invalidate_only:

1705

self.PropertiesChanged(

1706

_interface, dbus.Dictionary(),

1707

dbus.Array((dbus_name, )))

1708

else:

1709

dbus_value = transform_func(

1710

type_func(value),

1711

variant_level = variant_level)

1712

self.PropertyChanged(dbus.String(dbus_name),

1713

dbus_value)

1714

self.PropertiesChanged(

1715

_interface,

1716

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

1717

dbus_value }),

1718

dbus.Array())

989

dbus_value = transform_func(type_func(value),

990

variant_level

991

=variant_level)

992

self.PropertyChanged(dbus.String(dbus_name),

993

dbus_value)

1719

994

setattr(self, attrname, value)

1720

995

1721

996

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

1722

997

998

1723

999

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1724

1000

approvals_pending = notifychangeproperty(dbus.Boolean,

1725

1001

"ApprovalPending",

1727

1003

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

1728

1004

last_enabled = notifychangeproperty(datetime_to_dbus,

1729

1005

"LastEnabled")

1730

checker = notifychangeproperty(

1731

dbus.Boolean, "CheckerRunning",

1732

type_func = lambda checker: checker is not None)

1006

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

1007

type_func = lambda checker:

1008

checker is not None)

1733

1009

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1734

1010

"LastCheckedOK")

1735

last_checker_status = notifychangeproperty(dbus.Int16,

1736

"LastCheckerStatus")

1737

1011

last_approval_request = notifychangeproperty(

1738

1012

datetime_to_dbus, "LastApprovalRequest")

1739

1013

approved_by_default = notifychangeproperty(dbus.Boolean,

1740

1014

"ApprovedByDefault")

1741

approval_delay = notifychangeproperty(

1742

dbus.UInt64, "ApprovalDelay",

1743

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

1015

approval_delay = notifychangeproperty(dbus.UInt16,

1016

"ApprovalDelay",

1017

type_func =

1018

_timedelta_to_milliseconds)

1744

1019

approval_duration = notifychangeproperty(

1745

dbus.UInt64, "ApprovalDuration",

1746

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

1020

dbus.UInt16, "ApprovalDuration",

1021

type_func = _timedelta_to_milliseconds)

1747

1022

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

1748

timeout = notifychangeproperty(

1749

dbus.UInt64, "Timeout",

1750

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

1023

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

1024

type_func =

1025

_timedelta_to_milliseconds)

1751

1026

extended_timeout = notifychangeproperty(

1752

dbus.UInt64, "ExtendedTimeout",

1753

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

1754

interval = notifychangeproperty(

1755

dbus.UInt64, "Interval",

1756

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

1027

dbus.UInt16, "ExtendedTimeout",

1028

type_func = _timedelta_to_milliseconds)

1029

interval = notifychangeproperty(dbus.UInt16,

1030

"Interval",

1031

type_func =

1032

_timedelta_to_milliseconds)

1757

1033

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

1758

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

1759

invalidate_only=True)

1760

1034

1761

1035

del notifychangeproperty

1762

1036

1769

1043

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

1770

1044

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

1771

1045

1772

def checker_callback(self, source, condition,

1773

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

1774

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

1775

connection, command, *args,

1776

**kwargs)

1777

exitstatus = self.last_checker_status

1778

if exitstatus >= 0:

1046

def checker_callback(self, pid, condition, command,

1047

*args, **kwargs):

1048

self.checker_callback_tag = None

1049

self.checker = None

1050

if os.WIFEXITED(condition):

1051

exitstatus = os.WEXITSTATUS(condition)

1779

1052

# Emit D-Bus signal

1780

1053

self.CheckerCompleted(dbus.Int16(exitstatus),

1781

# This is specific to GNU libC

1782

dbus.Int64(exitstatus << 8),

1054

dbus.Int64(condition),

1783

1055

dbus.String(command))

1784

1056

else:

1785

1057

# Emit D-Bus signal

1786

1058

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

1787

dbus.Int64(

1788

# This is specific to GNU libC

1789

(exitstatus << 8)

1790

| self.last_checker_signal),

1059

dbus.Int64(condition),

1791

1060

dbus.String(command))

1792

return ret

1061

1062

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

1063

*args, **kwargs)

1793

1064

1794

1065

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

1795

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

1066

old_checker = self.checker

1067

if self.checker is not None:

1068

old_checker_pid = self.checker.pid

1069

else:

1070

old_checker_pid = None

1796

1071

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

1797

1072

# Only if new checker process was started

1798

1073

if (self.checker is not None

1802

1077

return r

1803

1078

1804

1079

def _reset_approved(self):

1805

self.approved = None

1080

self._approved = None

1806

1081

return False

1807

1082

1808

1083

def approve(self, value=True):

1809

self.approved = value

1810

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

1811

* 1000), self._reset_approved)

1812

1084

self.send_changedstate()

1085

self._approved = value

1086

gobject.timeout_add(_timedelta_to_milliseconds

1087

(self.approval_duration),

1088

self._reset_approved)

1089

1813

1090

1814

1091

## D-Bus methods, signals & properties

1815

1816

## Interfaces

1092

_interface = "se.recompile.Mandos.Client"

1817

1093

1818

1094

## Signals

1819

1095

1830

1106

pass

1831

1107

1832

1108

# PropertyChanged - signal

1833

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

1834

1109

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

1835

1110

def PropertyChanged(self, property, value):

1836

1111

"D-Bus signal"

1870

1145

self.checked_ok()

1871

1146

1872

1147

# Enable - method

1873

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

1874

1148

@dbus.service.method(_interface)

1875

1149

def Enable(self):

1876

1150

"D-Bus method"

1877

1151

self.enable()

1878

1152

1879

1153

# StartChecker - method

1880

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

1881

1154

@dbus.service.method(_interface)

1882

1155

def StartChecker(self):

1883

1156

"D-Bus method"

1884

1157

self.start_checker()

1885

1158

1886

1159

# Disable - method

1887

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

1888

1160

@dbus.service.method(_interface)

1889

1161

def Disable(self):

1890

1162

"D-Bus method"

1891

1163

self.disable()

1892

1164

1893

1165

# StopChecker - method

1894

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

1895

1166

@dbus.service.method(_interface)

1896

1167

def StopChecker(self):

1897

1168

self.stop_checker()

1904

1175

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

1905

1176

1906

1177

# ApprovedByDefault - property

1907

@dbus_service_property(_interface,

1908

signature="b",

1178

@dbus_service_property(_interface, signature="b",

1909

1179

access="readwrite")

1910

1180

def ApprovedByDefault_dbus_property(self, value=None):

1911

1181

if value is None: # get

1913

1183

self.approved_by_default = bool(value)

1914

1184

1915

1185

# ApprovalDelay - property

1916

@dbus_service_property(_interface,

1917

signature="t",

1186

@dbus_service_property(_interface, signature="t",

1918

1187

access="readwrite")

1919

1188

def ApprovalDelay_dbus_property(self, value=None):

1920

1189

if value is None: # get

1921

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

1922

* 1000)

1190

return dbus.UInt64(self.approval_delay_milliseconds())

1923

1191

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

1924

1192

1925

1193

# ApprovalDuration - property

1926

@dbus_service_property(_interface,

1927

signature="t",

1194

@dbus_service_property(_interface, signature="t",

1928

1195

access="readwrite")

1929

1196

def ApprovalDuration_dbus_property(self, value=None):

1930

1197

if value is None: # get

1931

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

1932

* 1000)

1198

return dbus.UInt64(_timedelta_to_milliseconds(

1199

self.approval_duration))

1933

1200

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

1934

1201

1935

1202

# Name - property

1936

@dbus_annotations(

1937

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

1938

1203

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

1939

1204

def Name_dbus_property(self):

1940

1205

return dbus.String(self.name)

1941

1206

1942

1207

# Fingerprint - property

1943

@dbus_annotations(

1944

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

1945

1208

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

1946

1209

def Fingerprint_dbus_property(self):

1947

1210

return dbus.String(self.fingerprint)

1948

1211

1949

1212

# Host - property

1950

@dbus_service_property(_interface,

1951

signature="s",

1213

@dbus_service_property(_interface, signature="s",

1952

1214

access="readwrite")

1953

1215

def Host_dbus_property(self, value=None):

1954

1216

if value is None: # get

1955

1217

return dbus.String(self.host)

1956

self.host = str(value)

1218

self.host = value

1957

1219

1958

1220

# Created - property

1959

@dbus_annotations(

1960

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

1961

1221

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

1962

1222

def Created_dbus_property(self):

1963

return datetime_to_dbus(self.created)

1223

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

1964

1224

1965

1225

# LastEnabled - property

1966

1226

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

1968

1228

return datetime_to_dbus(self.last_enabled)

1969

1229

1970

1230

# Enabled - property

1971

@dbus_service_property(_interface,

1972

signature="b",

1231

@dbus_service_property(_interface, signature="b",

1973

1232

access="readwrite")

1974

1233

def Enabled_dbus_property(self, value=None):

1975

1234

if value is None: # get

1980

1239

self.disable()

1981

1240

1982

1241

# LastCheckedOK - property

1983

@dbus_service_property(_interface,

1984

signature="s",

1242

@dbus_service_property(_interface, signature="s",

1985

1243

access="readwrite")

1986

1244

def LastCheckedOK_dbus_property(self, value=None):

1987

1245

if value is not None:

1989

1247

return

1990

1248

return datetime_to_dbus(self.last_checked_ok)

1991

1249

1992

# LastCheckerStatus - property

1993

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

1994

def LastCheckerStatus_dbus_property(self):

1995

return dbus.Int16(self.last_checker_status)

1996

1997

1250

# Expires - property

1998

1251

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

1999

1252

def Expires_dbus_property(self):

2005

1258

return datetime_to_dbus(self.last_approval_request)

2006

1259

2007

1260

# Timeout - property

2008

@dbus_service_property(_interface,

2009

signature="t",

1261

@dbus_service_property(_interface, signature="t",

2010

1262

access="readwrite")

2011

1263

def Timeout_dbus_property(self, value=None):

2012

1264

if value is None: # get

2013

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

2014

old_timeout = self.timeout

1265

return dbus.UInt64(self.timeout_milliseconds())

2015

1266

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

2016

# Reschedule disabling

2017

if self.enabled:

2018

now = datetime.datetime.utcnow()

2019

self.expires += self.timeout - old_timeout

2020

if self.expires <= now:

2021

# The timeout has passed

2022

self.disable()

2023

else:

2024

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

2025

is None):

2026

return

2027

GObject.source_remove(self.disable_initiator_tag)

2028

self.disable_initiator_tag = GObject.timeout_add(

2029

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

2030

self.disable)

1267

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

1268

return

1269

# Reschedule timeout

1270

gobject.source_remove(self.disable_initiator_tag)

1271

self.disable_initiator_tag = None

1272

self.expires = None

1273

time_to_die = _timedelta_to_milliseconds((self

1274

.last_checked_ok

1275

+ self.timeout)

1276

- datetime.datetime

1277

.utcnow())

1278

if time_to_die <= 0:

1279

# The timeout has passed

1280

self.disable()

1281

else:

1282

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

1283

+ datetime.timedelta(milliseconds =

1284

time_to_die))

1285

self.disable_initiator_tag = (gobject.timeout_add

1286

(time_to_die, self.disable))

2031

1287

2032

1288

# ExtendedTimeout - property

2033

@dbus_service_property(_interface,

2034

signature="t",

1289

@dbus_service_property(_interface, signature="t",

2035

1290

access="readwrite")

2036

1291

def ExtendedTimeout_dbus_property(self, value=None):

2037

1292

if value is None: # get

2038

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

2039

* 1000)

1293

return dbus.UInt64(self.extended_timeout_milliseconds())

2040

1294

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

2041

1295

2042

1296

# Interval - property

2043

@dbus_service_property(_interface,

2044

signature="t",

1297

@dbus_service_property(_interface, signature="t",

2045

1298

access="readwrite")

2046

1299

def Interval_dbus_property(self, value=None):

2047

1300

if value is None: # get

2048

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

1301

return dbus.UInt64(self.interval_milliseconds())

2049

1302

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

2050

1303

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

2051

1304

return

2052

if self.enabled:

2053

# Reschedule checker run

2054

GObject.source_remove(self.checker_initiator_tag)

2055

self.checker_initiator_tag = GObject.timeout_add(

2056

value, self.start_checker)

2057

self.start_checker() # Start one now, too

1305

# Reschedule checker run

1306

gobject.source_remove(self.checker_initiator_tag)

1307

self.checker_initiator_tag = (gobject.timeout_add

1308

(value, self.start_checker))

1309

self.start_checker() # Start one now, too

2058

1310

2059

1311

# Checker - property

2060

@dbus_service_property(_interface,

2061

signature="s",

1312

@dbus_service_property(_interface, signature="s",

2062

1313

access="readwrite")

2063

1314

def Checker_dbus_property(self, value=None):

2064

1315

if value is None: # get

2065

1316

return dbus.String(self.checker_command)

2066

self.checker_command = str(value)

1317

self.checker_command = value

2067

1318

2068

1319

# CheckerRunning - property

2069

@dbus_service_property(_interface,

2070

signature="b",

1320

@dbus_service_property(_interface, signature="b",

2071

1321

access="readwrite")

2072

1322

def CheckerRunning_dbus_property(self, value=None):

2073

1323

if value is None: # get

2078

1328

self.stop_checker()

2079

1329

2080

1330

# ObjectPath - property

2081

@dbus_annotations(

2082

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

2083

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

2084

1331

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

2085

1332

def ObjectPath_dbus_property(self):

2086

1333

return self.dbus_object_path # is already a dbus.ObjectPath

2087

1334

2088

1335

# Secret = property

2089

@dbus_annotations(

2090

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

2091

"invalidates"})

2092

@dbus_service_property(_interface,

2093

signature="ay",

2094

access="write",

2095

byte_arrays=True)

1336

@dbus_service_property(_interface, signature="ay",

1337

access="write", byte_arrays=True)

2096

1338

def Secret_dbus_property(self, value):

2097

self.secret = bytes(value)

1339

self.secret = str(value)

2098

1340

2099

1341

del _interface

2100

1342

2104

1346

self._pipe = child_pipe

2105

1347

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

2106

1348

if not self._pipe.recv():

2107

raise KeyError(fpr)

1349

raise KeyError()

2108

1350

2109

1351

def __getattribute__(self, name):

2110

if name == '_pipe':

1352

if(name == '_pipe'):

2111

1353

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

2112

1354

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

2113

1355

data = self._pipe.recv()

2114

1356

if data[0] == 'data':

2115

1357

return data[1]

2116

1358

if data[0] == 'function':

2117

2118

1359

def func(*args, **kwargs):

2119

1360

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

2120

1361

return self._pipe.recv()[1]

2121

2122

1362

return func

2123

1363

2124

1364

def __setattr__(self, name, value):

2125

if name == '_pipe':

1365

if(name == '_pipe'):

2126

1366

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

2127

1367

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

2128

1368

1369

class ClientDBusTransitional(ClientDBus):

1370

__metaclass__ = AlternateDBusNamesMetaclass

2129

1371

2130

1372

class ClientHandler(socketserver.BaseRequestHandler, object):

2131

1373

"""A class to handle client connections.

2136

1378

def handle(self):

2137

1379

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

2138

1380

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

2139

str(self.client_address))

1381

unicode(self.client_address))

2140

1382

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

2141

1383

self.server.child_pipe.fileno())

2142

1384

2143

session = gnutls.ClientSession(self.request)

1385

session = (gnutls.connection

1386

.ClientSession(self.request,

1387

gnutls.connection

1388

.X509Credentials()))

1389

1390

# Note: gnutls.connection.X509Credentials is really a

1391

# generic GnuTLS certificate credentials object so long as

1392

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

1393

# here despite using OpenPGP certificates.

2144

1394

2145

1395

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

2146

1396

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

2150

1400

priority = self.server.gnutls_priority

2151

1401

if priority is None:

2152

1402

priority = "NORMAL"

2153

gnutls.priority_set_direct(session._c_object, priority,

2154

None)

1403

(gnutls.library.functions

1404

.gnutls_priority_set_direct(session._c_object,

1405

priority, None))

2155

1406

2156

1407

# Start communication using the Mandos protocol

2157

1408

# Get protocol number

2159

1410

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

2160

1411

try:

2161

1412

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

2162

raise RuntimeError(line)

1413

raise RuntimeError

2163

1414

except (ValueError, IndexError, RuntimeError) as error:

2164

1415

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

2165

1416

return

2167

1418

# Start GnuTLS connection

2168

1419

try:

2169

1420

session.handshake()

2170

except gnutls.Error as error:

1421

except gnutls.errors.GNUTLSError as error:

2171

1422

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

2172

1423

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

2173

1424

# established. Just abandon the request.

2177

1428

approval_required = False

2178

1429

try:

2179

1430

try:

2180

fpr = self.fingerprint(

2181

self.peer_certificate(session))

2182

except (TypeError, gnutls.Error) as error:

1431

fpr = self.fingerprint(self.peer_certificate

1432

(session))

1433

except (TypeError,

1434

gnutls.errors.GNUTLSError) as error:

2183

1435

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

2184

1436

return

2185

1437

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

2198

1450

while True:

2199

1451

if not client.enabled:

2200

1452

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

2201

client.name)

1453

client.name)

2202

1454

if self.server.use_dbus:

2203

1455

# Emit D-Bus signal

2204

1456

client.Rejected("Disabled")

2205

1457

return

2206

1458

2207

if client.approved or not client.approval_delay:

1459

if client._approved or not client.approval_delay:

2208

1460

#We are approved or approval is disabled

2209

1461

break

2210

elif client.approved is None:

1462

elif client._approved is None:

2211

1463

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

2212

1464

client.name)

2213

1465

if self.server.use_dbus:

2214

1466

# Emit D-Bus signal

2215

1467

client.NeedApproval(

2216

client.approval_delay.total_seconds()

2217

* 1000, client.approved_by_default)

1468

client.approval_delay_milliseconds(),

1469

client.approved_by_default)

2218

1470

else:

2219

1471

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

2220

1472

client.name)

2226

1478

#wait until timeout or approved

2227

1479

time = datetime.datetime.now()

2228

1480

client.changedstate.acquire()

2229

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

1481

(client.changedstate.wait

1482

(float(client._timedelta_to_milliseconds(delay)

1483

/ 1000)))

2230

1484

client.changedstate.release()

2231

1485

time2 = datetime.datetime.now()

2232

1486

if (time2 - time) >= delay:

2243

1497

else:

2244

1498

delay -= time2 - time

2245

1499

2246

try:

2247

session.send(client.secret)

2248

except gnutls.Error as error:

2249

logger.warning("gnutls send failed",

2250

exc_info = error)

2251

return

1500

sent_size = 0

1501

while sent_size < len(client.secret):

1502

try:

1503

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

1504

except gnutls.errors.GNUTLSError as error:

1505

logger.warning("gnutls send failed")

1506

return

1507

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

1508

sent, len(client.secret)

1509

- (sent_size + sent))

1510

sent_size += sent

2252

1511

2253

1512

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

2254

1513

# bump the timeout using extended_timeout

2255

client.bump_timeout(client.extended_timeout)

1514

client.checked_ok(client.extended_timeout)

2256

1515

if self.server.use_dbus:

2257

1516

# Emit D-Bus signal

2258

1517

client.GotSecret()

2262

1521

client.approvals_pending -= 1

2263

1522

try:

2264

1523

session.bye()

2265

except gnutls.Error as error:

2266

logger.warning("GnuTLS bye failed",

2267

exc_info=error)

1524

except gnutls.errors.GNUTLSError as error:

1525

logger.warning("GnuTLS bye failed")

2268

1526

2269

1527

@staticmethod

2270

1528

def peer_certificate(session):

2271

1529

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

2272

1530

# If not an OpenPGP certificate...

2273

if (gnutls.certificate_type_get(session._c_object)

2274

!= gnutls.CRT_OPENPGP):

2275

# ...return invalid data

2276

return b""

1531

if (gnutls.library.functions

1532

.gnutls_certificate_type_get(session._c_object)

1533

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1534

# ...do the normal thing

1535

return session.peer_certificate

2277

1536

list_size = ctypes.c_uint(1)

2278

cert_list = (gnutls.certificate_get_peers

1537

cert_list = (gnutls.library.functions

1538

.gnutls_certificate_get_peers

2279

1539

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

2280

1540

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

2281

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

1541

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

1542

" certificate")

2282

1543

if list_size.value == 0:

2283

1544

return None

2284

1545

cert = cert_list[0]

2288

1549

def fingerprint(openpgp):

2289

1550

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2290

1551

# New GnuTLS "datum" with the OpenPGP public key

2291

datum = gnutls.datum_t(

2292

ctypes.cast(ctypes.c_char_p(openpgp),

2293

ctypes.POINTER(ctypes.c_ubyte)),

2294

ctypes.c_uint(len(openpgp)))

1552

datum = (gnutls.library.types

1553

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

1554

ctypes.POINTER

1555

(ctypes.c_ubyte)),

1556

ctypes.c_uint(len(openpgp))))

2295

1557

# New empty GnuTLS certificate

2296

crt = gnutls.openpgp_crt_t()

2297

gnutls.openpgp_crt_init(ctypes.byref(crt))

1558

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1559

(gnutls.library.functions

1560

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2298

1561

# Import the OpenPGP public key into the certificate

2299

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

2300

gnutls.OPENPGP_FMT_RAW)

1562

(gnutls.library.functions

1563

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

1564

gnutls.library.constants

1565

.GNUTLS_OPENPGP_FMT_RAW))

2301

1566

# Verify the self signature in the key

2302

1567

crtverify = ctypes.c_uint()

2303

gnutls.openpgp_crt_verify_self(crt, 0,

2304

ctypes.byref(crtverify))

1568

(gnutls.library.functions

1569

.gnutls_openpgp_crt_verify_self(crt, 0,

1570

ctypes.byref(crtverify)))

2305

1571

if crtverify.value != 0:

2306

gnutls.openpgp_crt_deinit(crt)

2307

raise gnutls.CertificateSecurityError("Verify failed")

1572

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1573

raise (gnutls.errors.CertificateSecurityError

1574

("Verify failed"))

2308

1575

# New buffer for the fingerprint

2309

1576

buf = ctypes.create_string_buffer(20)

2310

1577

buf_len = ctypes.c_size_t()

2311

1578

# Get the fingerprint from the certificate into the buffer

2312

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

2313

ctypes.byref(buf_len))

1579

(gnutls.library.functions

1580

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

1581

ctypes.byref(buf_len)))

2314

1582

# Deinit the certificate

2315

gnutls.openpgp_crt_deinit(crt)

1583

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2316

1584

# Convert the buffer to a Python bytestring

2317

1585

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

2318

1586

# Convert the bytestring to hexadecimal notation

2319

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

1587

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

2320

1588

return hex_fpr

2321

1589

2322

1590

2323

1591

class MultiprocessingMixIn(object):

2324

1592

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

2325

2326

1593

def sub_process_main(self, request, address):

2327

1594

try:

2328

1595

self.finish_request(request, address)

2329

except Exception:

1596

except:

2330

1597

self.handle_error(request, address)

2331

1598

self.close_request(request)

2332

1599

2333

1600

def process_request(self, request, address):

2334

1601

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

2335

1602

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

2336

args = (request, address))

1603

args = (request,

1604

address))

2337

1605

proc.start()

2338

1606

return proc

2339

1607

2340

1608

2341

1609

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2342

1610

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

2343

2344

1611

def process_request(self, request, client_address):

2345

1612

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

2346

1613

2355

1622

2356

1623

def add_pipe(self, parent_pipe, proc):

2357

1624

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

2358

raise NotImplementedError()

1625

raise NotImplementedError

2359

1626

2360

1627

2361

1628

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2367

1634

interface: None or a network interface name (string)

2368

1635

use_ipv6: Boolean; to use IPv6 or not

2369

1636

"""

2370

2371

1637

def __init__(self, server_address, RequestHandlerClass,

2372

interface=None,

2373

use_ipv6=True,

2374

socketfd=None):

2375

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

2376

creating a new one with socket.socket().

2377

"""

1638

interface=None, use_ipv6=True):

2378

1639

self.interface = interface

2379

1640

if use_ipv6:

2380

1641

self.address_family = socket.AF_INET6

2381

if socketfd is not None:

2382

# Save the file descriptor

2383

self.socketfd = socketfd

2384

# Save the original socket.socket() function

2385

self.socket_socket = socket.socket

2386

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

2387

#

2388

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

2389

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

2390

# patching socket.socket.)

2391

#

2392

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

2393

@functools.wraps(socket.socket)

2394

def socket_wrapper(*args, **kwargs):

2395

# Restore original function so subsequent calls are

2396

# not affected.

2397

socket.socket = self.socket_socket

2398

del self.socket_socket

2399

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

2400

# saved file descriptor.

2401

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

2402

# Replace socket.socket() function with wrapper

2403

socket.socket = socket_wrapper

2404

# The socketserver.TCPServer.__init__ will call

2405

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

2406

# socket_wrapper(), if socketfd was set.

2407

1642

socketserver.TCPServer.__init__(self, server_address,

2408

1643

RequestHandlerClass)

2409

2410

1644

def server_bind(self):

2411

1645

"""This overrides the normal server_bind() function

2412

1646

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

2418

1652

self.interface)

2419

1653

else:

2420

1654

try:

2421

self.socket.setsockopt(

2422

socket.SOL_SOCKET, SO_BINDTODEVICE,

2423

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

1655

self.socket.setsockopt(socket.SOL_SOCKET,

1656

SO_BINDTODEVICE,

1657

str(self.interface

1658

+ '\0'))

2424

1659

except socket.error as error:

2425

if error.errno == errno.EPERM:

2426

logger.error("No permission to bind to"

2427

" interface %s", self.interface)

2428

elif error.errno == errno.ENOPROTOOPT:

1660

if error[0] == errno.EPERM:

1661

logger.error("No permission to"

1662

" bind to interface %s",

1663

self.interface)

1664

elif error[0] == errno.ENOPROTOOPT:

2429

1665

logger.error("SO_BINDTODEVICE not available;"

2430

1666

" cannot bind to interface %s",

2431

1667

self.interface)

2432

elif error.errno == errno.ENODEV:

2433

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

2434

" cannot bind", self.interface)

2435

1668

else:

2436

1669

raise

2437

1670

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

2440

1673

if self.address_family == socket.AF_INET6:

2441

1674

any_address = "::" # in6addr_any

2442

1675

else:

2443

any_address = "0.0.0.0" # INADDR_ANY

1676

any_address = socket.INADDR_ANY

2444

1677

self.server_address = (any_address,

2445

1678

self.server_address[1])

2446

1679

elif not self.server_address[1]:

2447

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

1680

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

1681

0)

2448

1682

# if self.interface:

2449

1683

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

2450

1684

# 0, # port

2462

1696

gnutls_priority GnuTLS priority string

2463

1697

use_dbus: Boolean; to emit D-Bus signals or not

2464

1698

2465

Assumes a GObject.MainLoop event loop.

1699

Assumes a gobject.MainLoop event loop.

2466

1700

"""

2467

2468

1701

def __init__(self, server_address, RequestHandlerClass,

2469

interface=None,

2470

use_ipv6=True,

2471

clients=None,

2472

gnutls_priority=None,

2473

use_dbus=True,

2474

socketfd=None):

1702

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

1703

gnutls_priority=None, use_dbus=True):

2475

1704

self.enabled = False

2476

1705

self.clients = clients

2477

1706

if self.clients is None:

2481

1710

IPv6_TCPServer.__init__(self, server_address,

2482

1711

RequestHandlerClass,

2483

1712

interface = interface,

2484

use_ipv6 = use_ipv6,

2485

socketfd = socketfd)

2486

1713

use_ipv6 = use_ipv6)

2487

1714

def server_activate(self):

2488

1715

if self.enabled:

2489

1716

return socketserver.TCPServer.server_activate(self)

2493

1720

2494

1721

def add_pipe(self, parent_pipe, proc):

2495

1722

# Call "handle_ipc" for both data and EOF events

2496

GObject.io_add_watch(

2497

parent_pipe.fileno(),

2498

GObject.IO_IN | GObject.IO_HUP,

2499

functools.partial(self.handle_ipc,

2500

parent_pipe = parent_pipe,

2501

proc = proc))

1723

gobject.io_add_watch(parent_pipe.fileno(),

1724

gobject.IO_IN | gobject.IO_HUP,

1725

functools.partial(self.handle_ipc,

1726

parent_pipe =

1727

parent_pipe,

1728

proc = proc))

2502

1729

2503

def handle_ipc(self, source, condition,

2504

parent_pipe=None,

2505

proc = None,

2506

client_object=None):

1730

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

1731

proc = None, client_object=None):

1732

condition_names = {

1733

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

1734

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

1735

# blocking).

1736

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

1737

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

1738

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

1739

# broken, usually for pipes and

1740

# sockets).

1741

}

1742

conditions_string = ' | '.join(name

1743

for cond, name in

1744

condition_names.iteritems()

1745

if cond & condition)

2507

1746

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

2508

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

1747

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

2509

1748

# Wait for other process to exit

2510

1749

proc.join()

2511

1750

return False

2532

1771

parent_pipe.send(False)

2533

1772

return False

2534

1773

2535

GObject.io_add_watch(

2536

parent_pipe.fileno(),

2537

GObject.IO_IN | GObject.IO_HUP,

2538

functools.partial(self.handle_ipc,

2539

parent_pipe = parent_pipe,

2540

proc = proc,

2541

client_object = client))

1774

gobject.io_add_watch(parent_pipe.fileno(),

1775

gobject.IO_IN | gobject.IO_HUP,

1776

functools.partial(self.handle_ipc,

1777

parent_pipe =

1778

parent_pipe,

1779

proc = proc,

1780

client_object =

1781

client))

2542

1782

parent_pipe.send(True)

2543

1783

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

2544

1784

# same fileno

2550

1790

2551

1791

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

2552

1792

funcname)(*args,

2553

**kwargs)))

1793

**kwargs)))

2554

1794

2555

1795

if command == 'getattr':

2556

1796

attrname = request[1]

2557

if isinstance(client_object.__getattribute__(attrname),

2558

collections.Callable):

2559

parent_pipe.send(('function', ))

1797

if callable(client_object.__getattribute__(attrname)):

1798

parent_pipe.send(('function',))

2560

1799

else:

2561

parent_pipe.send((

2562

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

1800

parent_pipe.send(('data', client_object

1801

.__getattribute__(attrname)))

2563

1802

2564

1803

if command == 'setattr':

2565

1804

attrname = request[1]

2569

1808

return True

2570

1809

2571

1810

2572

def rfc3339_duration_to_delta(duration):

2573

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

2574

2575

>>> rfc3339_duration_to_delta("P7D")

2576

datetime.timedelta(7)

2577

>>> rfc3339_duration_to_delta("PT60S")

2578

datetime.timedelta(0, 60)

2579

>>> rfc3339_duration_to_delta("PT60M")

2580

datetime.timedelta(0, 3600)

2581

>>> rfc3339_duration_to_delta("PT24H")

2582

datetime.timedelta(1)

2583

>>> rfc3339_duration_to_delta("P1W")

2584

datetime.timedelta(7)

2585

>>> rfc3339_duration_to_delta("PT5M30S")

2586

datetime.timedelta(0, 330)

2587

>>> rfc3339_duration_to_delta("P1DT3M20S")

2588

datetime.timedelta(1, 200)

2589

"""

2590

2591

# Parsing an RFC 3339 duration with regular expressions is not

2592

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

2593

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

2594

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

2595

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

2596

# avoid excessive use of external libraries.

2597

2598

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

2599

Token = collections.namedtuple("Token", (

2600

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

2601

# a "group" containing digits

2602

"value", # datetime.timedelta or None

2603

"followers")) # Tokens valid after this token

2604

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

2605

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

2606

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

2607

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

2608

datetime.timedelta(seconds=1),

2609

frozenset((token_end, )))

2610

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

2611

datetime.timedelta(minutes=1),

2612

frozenset((token_second, token_end)))

2613

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

2614

datetime.timedelta(hours=1),

2615

frozenset((token_minute, token_end)))

2616

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

2617

None,

2618

frozenset((token_hour, token_minute,

2619

token_second)))

2620

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

2621

datetime.timedelta(days=1),

2622

frozenset((token_time, token_end)))

2623

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

2624

datetime.timedelta(weeks=4),

2625

frozenset((token_day, token_end)))

2626

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

2627

datetime.timedelta(weeks=52),

2628

frozenset((token_month, token_end)))

2629

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

2630

datetime.timedelta(weeks=1),

2631

frozenset((token_end, )))

2632

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

2633

frozenset((token_year, token_month,

2634

token_day, token_time,

2635

token_week)))

2636

# Define starting values

2637

value = datetime.timedelta() # Value so far

2638

found_token = None

2639

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

2640

s = duration # String left to parse

2641

# Loop until end token is found

2642

while found_token is not token_end:

2643

# Search for any currently valid tokens

2644

for token in followers:

2645

match = token.regexp.match(s)

2646

if match is not None:

2647

# Token found

2648

if token.value is not None:

2649

# Value found, parse digits

2650

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

2651

# Add to value so far

2652

value += factor * token.value

2653

# Strip token from string

2654

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

2655

# Go to found token

2656

found_token = token

2657

# Set valid next tokens

2658

followers = found_token.followers

2659

break

2660

else:

2661

# No currently valid tokens were found

2662

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

2663

.format(duration))

2664

# End token found

2665

return value

2666

2667

2668

1811

def string_to_delta(interval):

2669

1812

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

2670

1813

2681

1824

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

2682

1825

datetime.timedelta(0, 330)

2683

1826

"""

2684

2685

try:

2686

return rfc3339_duration_to_delta(interval)

2687

except ValueError:

2688

pass

2689

2690

1827

timevalue = datetime.timedelta(0)

2691

1828

for s in interval.split():

2692

1829

try:

2693

suffix = s[-1]

1830

suffix = unicode(s[-1])

2694

1831

value = int(s[:-1])

2695

1832

if suffix == "d":

2696

1833

delta = datetime.timedelta(value)

2703

1840

elif suffix == "w":

2704

1841

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

2705

1842

else:

2706

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

2707

except IndexError as e:

1843

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

1844

except (ValueError, IndexError) as e:

2708

1845

raise ValueError(*(e.args))

2709

1846

timevalue += delta

2710

1847

return timevalue

2711

1848

2712

1849

1850

def if_nametoindex(interface):

1851

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

1852

1853

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

1854

global if_nametoindex

1855

try:

1856

if_nametoindex = (ctypes.cdll.LoadLibrary

1857

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

1858

.if_nametoindex)

1859

except (OSError, AttributeError):

1860

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

1861

def if_nametoindex(interface):

1862

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

1863

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

1864

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

1865

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1866

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

1867

interface))

1868

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

1869

ifreq[16:20])[0]

1870

return interface_index

1871

return if_nametoindex(interface)

1872

1873

2713

1874

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

2714

1875

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

2715

1876

2723

1884

sys.exit()

2724

1885

if not noclose:

2725

1886

# Close all standard open file descriptors

2726

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

1887

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

2727

1888

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

2728

1889

raise OSError(errno.ENODEV,

2729

"{} not a character device"

2730

.format(os.devnull))

1890

"%s not a character device"

1891

% os.path.devnull)

2731

1892

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

2732

1893

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

2733

1894

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

2742

1903

2743

1904

parser = argparse.ArgumentParser()

2744

1905

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

2745

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

1906

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

2746

1907

help="show version number and exit")

2747

1908

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

2748

1909

help="Bind to interface IF")

2754

1915

help="Run self-test")

2755

1916

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

2756

1917

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

2757

" to terminal", default=None)

1918

" to terminal")

2758

1919

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

2759

1920

help="Debug level for stdout output")

2760

1921

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

2767

1928

" files")

2768

1929

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

2769

1930

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

2770

" system bus interface", default=None)

1931

" system bus interface")

2771

1932

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

2772

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

2773

default=None)

1933

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

2774

1934

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

2775

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

2776

" state", default=None)

2777

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

2778

help="Specify a file descriptor to a network"

2779

" socket to use instead of creating one")

2780

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

2781

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

2782

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

2783

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

2784

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

2785

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

2786

default=None)

2787

1935

dest="restore",

1936

help="Do not restore stored state",

1937

default=True)

1938

2788

1939

options = parser.parse_args()

2789

1940

2790

1941

if options.check:

2791

1942

import doctest

2792

fail_count, test_count = doctest.testmod()

2793

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

1943

doctest.testmod()

1944

sys.exit()

2794

1945

2795

1946

# Default values for config file for server-global settings

2796

1947

server_defaults = { "interface": "",

2798

1949

"port": "",

2799

1950

"debug": "False",

2800

1951

"priority":

2801

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

2802

":+SIGN-DSA-SHA256",

1952

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

2803

1953

"servicename": "Mandos",

2804

1954

"use_dbus": "True",

2805

1955

"use_ipv6": "True",

2806

1956

"debuglevel": "",

2807

"restore": "True",

2808

"socket": "",

2809

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

2810

"foreground": "False",

2811

"zeroconf": "True",

2812

}

1957

}

2813

1958

2814

1959

# Parse config file for server-global settings

2815

1960

server_config = configparser.SafeConfigParser(server_defaults)

2816

1961

del server_defaults

2817

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

1962

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

1963

"mandos.conf"))

2818

1964

# Convert the SafeConfigParser object to a dict

2819

1965

server_settings = server_config.defaults()

2820

1966

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

2821

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

1967

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

2822

1968

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

2823

1969

option)

2824

1970

if server_settings["port"]:

2825

1971

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

2826

1972

"port")

2827

if server_settings["socket"]:

2828

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

2829

"socket")

2830

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

2831

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

2832

# happen with a supplied network socket.

2833

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

2834

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

2835

["socket"])

2836

1973

del server_config

2837

1974

2838

1975

# Override the settings from the config file with command line

2839

1976

# options, if set.

2840

1977

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

2841

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

2842

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

2843

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

1978

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

1979

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

2844

1980

value = getattr(options, option)

2845

1981

if value is not None:

2846

1982

server_settings[option] = value

2847

1983

del options

2848

1984

# Force all strings to be unicode

2849

1985

for option in server_settings.keys():

2850

if isinstance(server_settings[option], bytes):

2851

server_settings[option] = (server_settings[option]

2852

.decode("utf-8"))

2853

# Force all boolean options to be boolean

2854

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

2855

"foreground", "zeroconf"):

2856

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

2857

# Debug implies foreground

2858

if server_settings["debug"]:

2859

server_settings["foreground"] = True

1986

if type(server_settings[option]) is str:

1987

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

2860

1988

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

2861

1989

2862

1990

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

2863

1991

2864

if (not server_settings["zeroconf"]

2865

and not (server_settings["port"]

2866

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

2867

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

2868

2869

1992

# For convenience

2870

1993

debug = server_settings["debug"]

2871

1994

debuglevel = server_settings["debuglevel"]

2872

1995

use_dbus = server_settings["use_dbus"]

2873

1996

use_ipv6 = server_settings["use_ipv6"]

2874

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

2875

stored_state_file)

2876

foreground = server_settings["foreground"]

2877

zeroconf = server_settings["zeroconf"]

2878

2879

if debug:

2880

initlogger(debug, logging.DEBUG)

2881

else:

2882

if not debuglevel:

2883

initlogger(debug)

2884

else:

2885

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

2886

initlogger(debug, level)

2887

1997

2888

1998

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

2889

syslogger.setFormatter(

2890

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

2891

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

2892

server_settings["servicename"])))

1999

syslogger.setFormatter(logging.Formatter

2000

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

2001

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

2002

% server_settings["servicename"]))

2893

2003

2894

2004

# Parse config file with clients

2895

client_config = configparser.SafeConfigParser(Client

2896

.client_defaults)

2005

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

2006

"extended_timeout": "15m",

2007

"interval": "2m",

2008

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

2009

"host": "",

2010

"approval_delay": "0s",

2011

"approval_duration": "1s",

2012

}

2013

client_config = configparser.SafeConfigParser(client_defaults)

2897

2014

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

2898

2015

"clients.conf"))

2899

2016

2900

2017

global mandos_dbus_service

2901

2018

mandos_dbus_service = None

2902

2019

2903

socketfd = None

2904

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

2905

socketfd = server_settings["socket"]

2906

tcp_server = MandosServer(

2907

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

2908

ClientHandler,

2909

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

2910

use_ipv6=use_ipv6,

2911

gnutls_priority=server_settings["priority"],

2912

use_dbus=use_dbus,

2913

socketfd=socketfd)

2914

if not foreground:

2915

pidfilename = "/run/mandos.pid"

2916

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

2917

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

2918

pidfile = None

2020

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

2021

server_settings["port"]),

2022

ClientHandler,

2023

interface=(server_settings["interface"]

2024

or None),

2025

use_ipv6=use_ipv6,

2026

gnutls_priority=

2027

server_settings["priority"],

2028

use_dbus=use_dbus)

2029

if not debug:

2030

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

2919

2031

try:

2920

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

2921

except IOError as e:

2922

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

2923

exc_info=e)

2032

pidfile = open(pidfilename, "w")

2033

except IOError:

2034

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

2924

2035

2925

for name, group in (("_mandos", "_mandos"),

2926

("mandos", "mandos"),

2927

("nobody", "nogroup")):

2036

try:

2037

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

2038

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

2039

except KeyError:

2928

2040

try:

2929

uid = pwd.getpwnam(name).pw_uid

2930

gid = pwd.getpwnam(group).pw_gid

2931

break

2041

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

2042

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

2932

2043

except KeyError:

2933

continue

2934

else:

2935

uid = 65534

2936

gid = 65534

2044

try:

2045

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

2046

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

2047

except KeyError:

2048

uid = 65534

2049

gid = 65534

2937

2050

try:

2938

2051

os.setgid(gid)

2939

2052

os.setuid(uid)

2940

2053

except OSError as error:

2941

if error.errno != errno.EPERM:

2942

raise

2054

if error[0] != errno.EPERM:

2055

raise error

2056

2057

if not debug and not debuglevel:

2058

logger.setLevel(logging.WARNING)

2059

if debuglevel:

2060

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

2061

logger.setLevel(level)

2943

2062

2944

2063

if debug:

2064

logger.setLevel(logging.DEBUG)

2945

2065

# Enable all possible GnuTLS debugging

2946

2066

2947

2067

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

2948

2068

# - GnuTLS manual

2949

gnutls.global_set_log_level(11)

2069

gnutls.library.functions.gnutls_global_set_log_level(11)

2950

2070

2951

@gnutls.log_func

2071

@gnutls.library.types.gnutls_log_func

2952

2072

def debug_gnutls(level, string):

2953

2073

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

2954

2074

2955

gnutls.global_set_log_function(debug_gnutls)

2075

(gnutls.library.functions

2076

.gnutls_global_set_log_function(debug_gnutls))

2956

2077

2957

2078

# Redirect stdin so all checkers get /dev/null

2958

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

2079

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

2959

2080

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

2960

2081

if null > 2:

2961

2082

os.close(null)

2083

else:

2084

# No console logging

2085

logger.removeHandler(console)

2962

2086

2963

2087

# Need to fork before connecting to D-Bus

2964

if not foreground:

2088

if not debug:

2965

2089

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

2966

2090

daemon()

2967

2091

2968

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

2969

# need to inform GObject that threads will be used.

2970

GObject.threads_init()

2971

2972

2092

global main_loop

2973

2093

# From the Avahi example code

2974

DBusGMainLoop(set_as_default=True)

2975

main_loop = GObject.MainLoop()

2094

DBusGMainLoop(set_as_default=True )

2095

main_loop = gobject.MainLoop()

2976

2096

bus = dbus.SystemBus()

2977

2097

# End of Avahi example code

2978

2098

if use_dbus:

2979

2099

try:

2980

2100

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

2981

bus,

2982

do_not_queue=True)

2983

old_bus_name = dbus.service.BusName(

2984

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

2985

do_not_queue=True)

2986

except dbus.exceptions.DBusException as e:

2987

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

2101

bus, do_not_queue=True)

2102

old_bus_name = (dbus.service.BusName

2103

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

2104

do_not_queue=True))

2105

except dbus.exceptions.NameExistsException as e:

2106

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

2988

2107

use_dbus = False

2989

2108

server_settings["use_dbus"] = False

2990

2109

tcp_server.use_dbus = False

2991

if zeroconf:

2992

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2993

service = AvahiServiceToSyslog(

2994

name = server_settings["servicename"],

2995

servicetype = "_mandos._tcp",

2996

protocol = protocol,

2997

bus = bus)

2998

if server_settings["interface"]:

2999

service.interface = if_nametoindex(

3000

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

2110

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2111

service = AvahiServiceToSyslog(name =

2112

server_settings["servicename"],

2113

servicetype = "_mandos._tcp",

2114

protocol = protocol, bus = bus)

2115

if server_settings["interface"]:

2116

service.interface = (if_nametoindex

2117

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

3001

2118

3002

2119

global multiprocessing_manager

3003

2120

multiprocessing_manager = multiprocessing.Manager()

3004

2121

3005

2122

client_class = Client

3006

2123

if use_dbus:

3007

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

3008

3009

client_settings = Client.config_parser(client_config)

2124

client_class = functools.partial(ClientDBusTransitional,

2125

bus = bus)

2126

2127

special_settings = {

2128

# Some settings need to be accessd by special methods;

2129

# booleans need .getboolean(), etc. Here is a list of them:

2130

"approved_by_default":

2131

lambda section:

2132

client_config.getboolean(section, "approved_by_default"),

2133

}

2134

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

2135

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

2136

# with exceptions for any special settings as defined above

2137

client_settings = dict((clientname,

2138

dict((setting,

2139

(value if

2140

setting not in special_settings

2141

else special_settings[setting]

2142

(clientname)))

2143

for setting, value

2144

in client_config.items(clientname)))

2145

for clientname in client_config.sections())

2146

3010

2147

old_client_settings = {}

3011

clients_data = {}

3012

3013

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

3014

global wnull

3015

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

3016

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

3017

# mode

3018

if debug or not foreground:

3019

wnull.close()

3020

3021

# Get client data and settings from last running state.

2148

clients_data = []

2149

2150

# Get client data and settings from last running state.

3022

2151

if server_settings["restore"]:

3023

2152

try:

3024

2153

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

3025

clients_data, old_client_settings = pickle.load(

3026

stored_state)

2154

clients_data, old_client_settings = (

2155

pickle.load(stored_state))

3027

2156

os.remove(stored_state_path)

3028

2157

except IOError as e:

3029

if e.errno == errno.ENOENT:

3030

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

3031

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

3032

else:

3033

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

3034

exc_info=e)

2158

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

2159

.format(e))

2160

if e.errno != errno.ENOENT:

3035

2161

raise

3036

except EOFError as e:

3037

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

3038

"EOFError:",

3039

exc_info=e)

3040

3041

with PGPEngine() as pgp:

3042

for client_name, client in clients_data.items():

3043

# Skip removed clients

3044

if client_name not in client_settings:

3045

continue

3046

3047

# Decide which value to use after restoring saved state.

3048

# We have three different values: Old config file,

3049

# new config file, and saved state.

3050

# New config value takes precedence if it differs from old

3051

# config value, otherwise use saved state.

3052

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

3053

try:

3054

# For each value in new config, check if it

3055

# differs from the old config value (Except for

3056

# the "secret" attribute)

3057

if (name != "secret"

3058

and (value !=

3059

old_client_settings[client_name][name])):

3060

client[name] = value

3061

except KeyError:

3062

pass

3063

3064

# Clients who has passed its expire date can still be

3065

# enabled if its last checker was successful. A Client

3066

# whose checker succeeded before we stored its state is

3067

# assumed to have successfully run all checkers during

3068

# downtime.

3069

if client["enabled"]:

3070

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

3071

if not client["last_checked_ok"]:

3072

logger.warning(

3073

"disabling client {} - Client never "

3074

"performed a successful checker".format(

3075

client_name))

3076

client["enabled"] = False

3077

elif client["last_checker_status"] != 0:

3078

logger.warning(

3079

"disabling client {} - Client last"

3080

" checker failed with error code"

3081

" {}".format(

3082

client_name,

3083

client["last_checker_status"]))

3084

client["enabled"] = False

3085

else:

3086

client["expires"] = (

3087

datetime.datetime.utcnow()

3088

+ client["timeout"])

3089

logger.debug("Last checker succeeded,"

3090

" keeping {} enabled".format(

3091

client_name))

2162

2163

for client in clients_data:

2164

client_name = client["name"]

2165

2166

# Decide which value to use after restoring saved state.

2167

# We have three different values: Old config file,

2168

# new config file, and saved state.

2169

# New config value takes precedence if it differs from old

2170

# config value, otherwise use saved state.

2171

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

3092

2172

try:

3093

client["secret"] = pgp.decrypt(

3094

client["encrypted_secret"],

3095

client_settings[client_name]["secret"])

3096

except PGPError:

3097

# If decryption fails, we use secret from new settings

3098

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

3099

client_name))

3100

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

3101

["secret"])

3102

3103

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

3104

for client_name in (set(old_client_settings)

3105

- set(client_settings)):

3106

del clients_data[client_name]

3107

for client_name in (set(client_settings)

3108

- set(old_client_settings)):

3109

clients_data[client_name] = client_settings[client_name]

3110

3111

# Create all client objects

3112

for client_name, client in clients_data.items():

3113

tcp_server.clients[client_name] = client_class(

3114

name = client_name,

3115

settings = client,

3116

server_settings = server_settings)

2173

# For each value in new config, check if it differs

2174

# from the old config value (Except for the "secret"

2175

# attribute)

2176

if (name != "secret" and

2177

value != old_client_settings[client_name][name]):

2178

setattr(client, name, value)

2179

except KeyError:

2180

pass

2181

2182

# Clients who has passed its expire date, can still be enabled

2183

# if its last checker was sucessful. Clients who checkers

2184

# failed before we stored it state is asumed to had failed

2185

# checker during downtime.

2186

if client["enabled"] and client["last_checked_ok"]:

2187

if ((datetime.datetime.utcnow()

2188

- client["last_checked_ok"]) > client["interval"]):

2189

if client["last_checker_status"] != 0:

2190

client["enabled"] = False

2191

else:

2192

client["expires"] = (datetime.datetime.utcnow()

2193

+ client["timeout"])

2194

2195

client["changedstate"] = (multiprocessing_manager

2196

.Condition(multiprocessing_manager

2197

.Lock()))

2198

if use_dbus:

2199

new_client = ClientDBusTransitional.__new__(

2200

ClientDBusTransitional)

2201

tcp_server.clients[client_name] = new_client

2202

new_client.bus = bus

2203

for name, value in client.iteritems():

2204

setattr(new_client, name, value)

2205

new_client._approvals_pending = 0

2206

new_client.add_to_dbus()

2207

else:

2208

tcp_server.clients[client_name] = Client.__new__(Client)

2209

for name, value in client.iteritems():

2210

setattr(tcp_server.clients[client_name], name, value)

2211

2212

tcp_server.clients[client_name].decrypt_secret(

2213

client_settings[client_name]["secret"])

2214

2215

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

2216

for clientname in set(old_client_settings) - set(client_settings):

2217

del tcp_server.clients[clientname]

2218

for clientname in set(client_settings) - set(old_client_settings):

2219

tcp_server.clients[clientname] = client_class(name

2220

= clientname,

2221

config =

2222

client_settings

2223

[clientname])

3117

2224

3118

2225

if not tcp_server.clients:

3119

2226

logger.warning("No clients defined")

3120

3121

if not foreground:

3122

if pidfile is not None:

3123

pid = os.getpid()

3124

try:

3125

with pidfile:

3126

print(pid, file=pidfile)

3127

except IOError:

3128

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

3129

pidfilename, pid)

3130

del pidfile

2227

2228

if not debug:

2229

try:

2230

with pidfile:

2231

pid = os.getpid()

2232

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

2233

del pidfile

2234

except IOError:

2235

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

2236

pidfilename, pid)

2237

except NameError:

2238

# "pidfile" was never created

2239

pass

3131

2240

del pidfilename

2241

2242

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

3132

2243

3133

2244

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

3134

2245

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

3135

2246

3136

2247

if use_dbus:

3137

3138

@alternate_dbus_interfaces(

3139

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

3140

class MandosDBusService(DBusObjectWithObjectManager):

2248

class MandosDBusService(dbus.service.Object):

3141

2249

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

3142

3143

2250

def __init__(self):

3144

2251

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

3145

3146

2252

_interface = "se.recompile.Mandos"

3147

2253

3148

2254

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

3155

2261

"D-Bus signal"

3156

2262

pass

3157

2263

3158

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

3159

"true"})

3160

2264

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

3161

2265

def ClientRemoved(self, objpath, name):

3162

2266

"D-Bus signal"

3163

2267

pass

3164

2268

3165

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

3166

"true"})

3167

2269

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

3168

2270

def GetAllClients(self):

3169

2271

"D-Bus method"

3170

return dbus.Array(c.dbus_object_path for c in

2272

return dbus.Array(c.dbus_object_path

2273

for c in

3171

2274

tcp_server.clients.itervalues())

3172

2275

3173

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

3174

"true"})

3175

2276

@dbus.service.method(_interface,

3176

2277

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

3177

2278

def GetAllClientsWithProperties(self):

3178

2279

"D-Bus method"

3179

2280

return dbus.Dictionary(

3180

{ c.dbus_object_path: c.GetAll(

3181

"se.recompile.Mandos.Client")

3182

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

2281

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

2282

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

3183

2283

signature="oa{sv}")

3184

2284

3185

2285

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

3189

2289

if c.dbus_object_path == object_path:

3190

2290

del tcp_server.clients[c.name]

3191

2291

c.remove_from_connection()

3192

# Don't signal the disabling

2292

# Don't signal anything except ClientRemoved

3193

2293

c.disable(quiet=True)

3194

# Emit D-Bus signal for removal

3195

self.client_removed_signal(c)

2294

# Emit D-Bus signal

2295

self.ClientRemoved(object_path, c.name)

3196

2296

return

3197

2297

raise KeyError(object_path)

3198

2298

3199

2299

del _interface

3200

3201

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3202

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

3203

def GetManagedObjects(self):

3204

"""D-Bus method"""

3205

return dbus.Dictionary(

3206

{ client.dbus_object_path:

3207

dbus.Dictionary(

3208

{ interface: client.GetAll(interface)

3209

for interface in

3210

client._get_all_interface_names()})

3211

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

3212

3213

def client_added_signal(self, client):

3214

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

3215

if use_dbus:

3216

# New standard signal

3217

self.InterfacesAdded(

3218

client.dbus_object_path,

3219

dbus.Dictionary(

3220

{ interface: client.GetAll(interface)

3221

for interface in

3222

client._get_all_interface_names()}))

3223

# Old signal

3224

self.ClientAdded(client.dbus_object_path)

3225

3226

def client_removed_signal(self, client):

3227

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

3228

if use_dbus:

3229

# New standard signal

3230

self.InterfacesRemoved(

3231

client.dbus_object_path,

3232

client._get_all_interface_names())

3233

# Old signal

3234

self.ClientRemoved(client.dbus_object_path,

3235

client.name)

3236

2300

3237

mandos_dbus_service = MandosDBusService()

2301

class MandosDBusServiceTransitional(MandosDBusService):

2302

__metaclass__ = AlternateDBusNamesMetaclass

2303

mandos_dbus_service = MandosDBusServiceTransitional()

3238

2304

3239

2305

def cleanup():

3240

2306

"Cleanup function; run on exit"

3241

if zeroconf:

3242

service.cleanup()

2307

service.cleanup()

3243

2308

3244

2309

multiprocessing.active_children()

3245

wnull.close()

3246

2310

if not (tcp_server.clients or client_settings):

3247

2311

return

3248

2312

3249

2313

# Store client before exiting. Secrets are encrypted with key

3250

2314

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

3251

2315

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

3252

clients = {}

3253

with PGPEngine() as pgp:

3254

for client in tcp_server.clients.itervalues():

3255

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

3256

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

3257

key)

3258

client_dict = {}

3259

3260

# A list of attributes that can not be pickled

3261

# + secret.

3262

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

3263

"checker", "server_settings" }

3264

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

3265

.Object):

3266

exclude.add(name)

3267

3268

client_dict["encrypted_secret"] = (client

3269

.encrypted_secret)

3270

for attr in client.client_structure:

3271

if attr not in exclude:

3272

client_dict[attr] = getattr(client, attr)

3273

3274

clients[client.name] = client_dict

3275

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

3276

2316

clients = []

2317

for client in tcp_server.clients.itervalues():

2318

client.encrypt_secret(

2319

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

2320

2321

client_dict = {}

2322

2323

# A list of attributes that will not be stored when

2324

# shutting down.

2325

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

2326

for name, typ in inspect.getmembers(dbus.service.Object):

2327

exclude.add(name)

2328

2329

client_dict["encrypted_secret"] = client.encrypted_secret

2330

for attr in client.client_structure:

2331

if attr not in exclude:

2332

client_dict[attr] = getattr(client, attr)

2333

2334

clients.append(client_dict)

2335

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

2336

3277

2337

try:

3278

with tempfile.NamedTemporaryFile(

3279

mode='wb',

3280

suffix=".pickle",

3281

prefix='clients-',

3282

dir=os.path.dirname(stored_state_path),

3283

delete=False) as stored_state:

2338

with os.fdopen(os.open(stored_state_path,

2339

os.O_CREAT|os.O_WRONLY|os.O_TRUNC,

2340

stat.S_IRUSR | stat.S_IWUSR),

2341

"wb") as stored_state:

3284

2342

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

3285

tempname = stored_state.name

3286

os.rename(tempname, stored_state_path)

3287

except (IOError, OSError) as e:

3288

if not debug:

3289

try:

3290

os.remove(tempname)

3291

except NameError:

3292

pass

3293

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

3294

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

3295

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

3296

else:

3297

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

3298

exc_info=e)

2343

except IOError as e:

2344

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

2345

.format(e))

2346

if e.errno != errno.ENOENT:

3299

2347

raise

3300

2348

3301

2349

# Delete all clients, and settings from config

3302

2350

while tcp_server.clients:

3303

2351

name, client = tcp_server.clients.popitem()

3304

2352

if use_dbus:

3305

2353

client.remove_from_connection()

3306

# Don't signal the disabling

2354

# Don't signal anything except ClientRemoved

3307

2355

client.disable(quiet=True)

3308

# Emit D-Bus signal for removal

3309

2356

if use_dbus:

3310

mandos_dbus_service.client_removed_signal(client)

2357

# Emit D-Bus signal

2358

mandos_dbus_service.ClientRemoved(client

2359

.dbus_object_path,

2360

client.name)

3311

2361

client_settings.clear()

3312

2362

3313

2363

atexit.register(cleanup)

3314

2364

3315

2365

for client in tcp_server.clients.itervalues():

3316

2366

if use_dbus:

3317

# Emit D-Bus signal for adding

3318

mandos_dbus_service.client_added_signal(client)

2367

# Emit D-Bus signal

2368

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3319

2369

# Need to initiate checking of clients

3320

2370

if client.enabled:

3321

2371

client.init_checker()

2372

3322

2373

3323

2374

tcp_server.enable()

3324

2375

tcp_server.server_activate()

3325

2376

3326

2377

# Find out what port we got

3327

if zeroconf:

3328

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

2378

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

3329

2379

if use_ipv6:

3330

2380

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

3331

" flowinfo %d, scope_id %d",

3332

*tcp_server.socket.getsockname())

2381

" flowinfo %d, scope_id %d"

2382

% tcp_server.socket.getsockname())

3333

2383

else: # IPv4

3334

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

3335

*tcp_server.socket.getsockname())

2384

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

2385

% tcp_server.socket.getsockname())

3336

2386

3337

2387

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

3338

2388

3339

2389

try:

3340

if zeroconf:

3341

# From the Avahi example code

3342

try:

3343

service.activate()

3344

except dbus.exceptions.DBusException as error:

3345

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

3346

cleanup()

3347

sys.exit(1)

3348

# End of Avahi example code

2390

# From the Avahi example code

2391

try:

2392

service.activate()

2393

except dbus.exceptions.DBusException as error:

2394

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

2395

cleanup()

2396

sys.exit(1)

2397

# End of Avahi example code

3349

2398

3350

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

2399

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

3351

2400

lambda *args, **kwargs:

3352

2401

(tcp_server.handle_request

3353

2402

(*args[2:], **kwargs) or True))

3355

2404

logger.debug("Starting main loop")

3356

2405

main_loop.run()

3357

2406

except AvahiError as error:

3358

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

2407

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

3359

2408

cleanup()

3360

2409

sys.exit(1)

3361

2410

except KeyboardInterrupt: