/mandos/trunk : revision 466

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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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 optparse

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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 dbus

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import dbus.service

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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return interface_index

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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"""A simple class for OpenPGP symmetric encryption & decryption"""

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def __init__(self):

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self.tempdir = tempfile.mkdtemp(prefix="mandos-")

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self.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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version = "1.2.3"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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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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self.group = None # our entry group

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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logger.critical("No suitable Zeroconf service name found"

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = 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.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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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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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"):

323

logger.info("Local Zeroconf service name collision.")

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return self.rename(remove=False)

325

else:

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

327

self.cleanup()

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os._exit(1)

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except dbus.exceptions.DBusException, error:

172

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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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"""

340

self.remove()

341

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if self.group is None:

342

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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self.group.connect_to_signal('StateChanged',

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self

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.entry_group_state_changed)

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190

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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199

avahi.string_array_to_txt_array(self.TXT))

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200

self.group.Commit()

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361

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def entry_group_state_changed(self, state, error):

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202

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

363

203

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

369

209

self.rename()

370

210

elif state == avahi.ENTRY_GROUP_FAILURE:

371

211

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

372

str(error))

373

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

374

212

unicode(error))

213

raise AvahiGroupError("State changed: %s"

214

% unicode(error))

375

215

def cleanup(self):

376

216

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

377

217

if self.group is not None:

378

try:

379

self.group.Free()

380

except (dbus.exceptions.UnknownMethodException,

381

dbus.exceptions.DBusException):

382

pass

218

self.group.Free()

383

219

self.group = None

384

self.remove()

385

386

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

220

def server_state_changed(self, state):

387

221

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

388

222

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

389

bad_states = {

390

avahi.SERVER_INVALID: "Zeroconf server invalid",

391

avahi.SERVER_REGISTERING: None,

392

avahi.SERVER_COLLISION: "Zeroconf server name collision",

393

avahi.SERVER_FAILURE: "Zeroconf server failure",

394

}

395

if state in bad_states:

396

if bad_states[state] is not None:

397

if error is None:

398

logger.error(bad_states[state])

399

else:

400

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

401

self.cleanup()

223

if state == avahi.SERVER_COLLISION:

224

logger.error("Zeroconf server name collision")

225

self.remove()

402

226

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)

415

else:

416

if error is None:

417

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

418

else:

419

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

420

227

self.add()

421

228

def activate(self):

422

229

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

423

230

if self.server is None:

424

231

self.server = dbus.Interface(

425

232

self.bus.get_object(avahi.DBUS_NAME,

426

avahi.DBUS_PATH_SERVER,

427

follow_name_owner_changes=True),

233

avahi.DBUS_PATH_SERVER),

428

234

avahi.DBUS_INTERFACE_SERVER)

429

235

self.server.connect_to_signal("StateChanged",

430

self.server_state_changed)

236

self.server_state_changed)

431

237

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

432

238

433

239

434

class AvahiServiceToSyslog(AvahiService):

435

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

436

"""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)))

441

return ret

442

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

708

240

class Client(object):

709

241

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

710

242

711

243

Attributes:

712

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

244

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

713

245

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

714

246

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

715

247

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

722

254

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

723

255

checker_initiator_tag: a gobject event source tag, or None

724

256

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

725

client_structure: Object describing what attributes a client has

726

and is used for storing the client at exit

727

257

current_checker_command: string; current running checker_command

258

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

728

259

disable_initiator_tag: a gobject event source tag, or None

729

260

enabled: bool()

730

261

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

733

264

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

734

265

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

735

266

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

736

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

267

last_enabled: datetime.datetime(); (UTC)

742

268

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

743

269

D-Bus identifiers

744

270

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

745

271

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

746

272

until this client is disabled

747

extended_timeout: extra long timeout when secret has been sent

748

273

runtime_expansions: Allowed attributes for runtime expansion.

749

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

750

disabled, or None

751

server_settings: The server_settings dict from main()

752

274

"""

753

275

754

276

runtime_expansions = ("approval_delay", "approval_duration",

755

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

756

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

757

"last_approval_request", "last_checked_ok",

277

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

278

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

758

279

"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

280

771

281

@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):

282

def _timedelta_to_milliseconds(td):

283

"Convert a datetime.timedelta() to milliseconds"

284

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

285

+ (td.seconds * 1000)

286

+ (td.microseconds // 1000))

287

288

def timeout_milliseconds(self):

289

"Return the 'timeout' attribute in milliseconds"

290

return self._timedelta_to_milliseconds(self.timeout)

291

292

def interval_milliseconds(self):

293

"Return the 'interval' attribute in milliseconds"

294

return self._timedelta_to_milliseconds(self.interval)

295

296

def approval_delay_milliseconds(self):

297

return self._timedelta_to_milliseconds(self.approval_delay)

298

299

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

300

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

301

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

302

attribute."""

822

303

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

304

if config is None:

305

config = {}

840

306

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

307

# Uppercase and remove spaces from fingerprint for later

308

# comparison purposes with return value from the fingerprint()

309

# function

310

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

311

.replace(" ", ""))

841

312

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

842

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

843

datetime.datetime.utcnow())

844

845

# attributes specific for this server instance

313

if "secret" in config:

314

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

315

elif "secfile" in config:

316

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

317

(config["secfile"])),

318

"rb") as secfile:

319

self.secret = secfile.read()

320

else:

321

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

322

% self.name)

323

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

324

self.created = datetime.datetime.utcnow()

325

self.enabled = False

326

self.last_approval_request = None

327

self.last_enabled = None

328

self.last_checked_ok = None

329

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

330

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

331

self.disable_hook = disable_hook

846

332

self.checker = None

847

333

self.checker_initiator_tag = None

848

334

self.disable_initiator_tag = None

849

335

self.checker_callback_tag = None

336

self.checker_command = config["checker"]

850

337

self.current_checker_command = None

851

self.approved = None

338

self.last_connect = None

339

self._approved = None

340

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

341

True)

852

342

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()

857

if not attr.startswith("_")]

858

self.client_structure.append("client_structure")

859

860

for name, t in inspect.getmembers(

861

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

862

if not name.startswith("_"):

863

self.client_structure.append(name)

343

self.approval_delay = string_to_delta(

344

config["approval_delay"])

345

self.approval_duration = string_to_delta(

346

config["approval_duration"])

347

self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())

864

348

865

# Send notice to process children that client state has changed

866

349

def send_changedstate(self):

867

with self.changedstate:

868

self.changedstate.notify_all()

869

350

self.changedstate.acquire()

351

self.changedstate.notify_all()

352

self.changedstate.release()

353

870

354

def enable(self):

871

355

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

872

356

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

873

357

# Already enabled

874

358

return

875

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

876

self.enabled = True

359

self.send_changedstate()

877

360

self.last_enabled = datetime.datetime.utcnow()

878

self.init_checker()

879

self.send_changedstate()

361

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

362

# and every interval from then on.

363

self.checker_initiator_tag = (gobject.timeout_add

364

(self.interval_milliseconds(),

365

self.start_checker))

366

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

367

self.disable_initiator_tag = (gobject.timeout_add

368

(self.timeout_milliseconds(),

369

self.disable))

370

self.enabled = True

371

# Also start a new checker *right now*.

372

self.start_checker()

880

373

881

374

def disable(self, quiet=True):

882

375

"""Disable this client."""

883

376

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

884

377

return False

885

378

if not quiet:

379

self.send_changedstate()

380

if not quiet:

886

381

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

887

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

382

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

888

383

gobject.source_remove(self.disable_initiator_tag)

889

384

self.disable_initiator_tag = None

890

self.expires = None

891

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

385

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

892

386

gobject.source_remove(self.checker_initiator_tag)

893

387

self.checker_initiator_tag = None

894

388

self.stop_checker()

389

if self.disable_hook:

390

self.disable_hook(self)

895

391

self.enabled = False

896

if not quiet:

897

self.send_changedstate()

898

392

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

899

393

return False

900

394

901

395

def __del__(self):

396

self.disable_hook = None

902

397

self.disable()

903

398

904

def init_checker(self):

905

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

906

# 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)

912

# 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)

917

# Also start a new checker *right now*.

918

self.start_checker()

919

920

def checker_callback(self, source, condition, connection,

921

command):

399

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

922

400

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

923

401

self.checker_callback_tag = None

924

402

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

932

if self.last_checker_status == 0:

403

if os.WIFEXITED(condition):

404

exitstatus = os.WEXITSTATUS(condition)

405

if exitstatus == 0:

933

406

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

934

407

vars(self))

935

408

self.checked_ok()

936

409

else:

937

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

410

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

411

vars(self))

938

412

else:

939

self.last_checker_status = -1

940

self.last_checker_signal = -returncode

941

413

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

942

414

vars(self))

943

return False

944

415

945

416

def checked_ok(self):

946

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

417

"""Bump up the timeout for this client.

418

419

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

420

alive and well.

421

"""

947

422

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."""

954

if timeout is None:

955

timeout = self.timeout

956

if self.disable_initiator_tag is not None:

957

gobject.source_remove(self.disable_initiator_tag)

958

self.disable_initiator_tag = None

959

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

960

self.disable_initiator_tag = gobject.timeout_add(

961

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

962

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

423

gobject.source_remove(self.disable_initiator_tag)

424

self.disable_initiator_tag = (gobject.timeout_add

425

(self.timeout_milliseconds(),

426

self.disable))

963

427

964

428

def need_approval(self):

965

429

self.last_approval_request = datetime.datetime.utcnow()

970

434

If a checker already exists, leave it running and do

971

435

nothing."""

972

436

# 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

437

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

438

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

439

# client would inevitably timeout, since no checker would get

440

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

977

441

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

978

442

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

979

443

# should be.

980

444

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

445

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

446

try:

447

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

448

except (AttributeError, OSError), error:

449

if (isinstance(error, OSError)

450

and error.errno != errno.ECHILD):

451

raise error

452

else:

453

if pid:

454

logger.warning("Checker was a zombie")

455

gobject.source_remove(self.checker_callback_tag)

456

self.checker_callback(pid, status,

457

self.current_checker_command)

985

458

# Start a new checker if needed

986

459

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

460

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

461

# In case checker_command has exactly one % operator

462

command = self.checker_command % self.host

463

except TypeError:

464

# Escape attributes for the shell

465

escaped_attrs = dict(

466

(attr,

467

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

468

errors=

469

'replace')))

470

for attr in

471

self.runtime_expansions)

472

473

try:

474

command = self.checker_command % escaped_attrs

475

except TypeError, error:

476

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

477

' %s', self.checker_command, error)

478

return True # Try again later

998

479

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)

480

try:

481

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

482

command, self.name)

483

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

484

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

485

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

486

# always replaced by /dev/null.)

487

self.checker = subprocess.Popen(command,

488

close_fds=True,

489

shell=True, cwd="/")

490

self.checker_callback_tag = (gobject.child_watch_add

491

(self.checker.pid,

492

self.checker_callback,

493

data=command))

494

# The checker may have completed before the gobject

495

# watch was added. Check for this.

496

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

497

if pid:

498

gobject.source_remove(self.checker_callback_tag)

499

self.checker_callback(pid, status, command)

500

except OSError, error:

501

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

502

error)

1024

503

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

1025

504

return True

1026

505

1032

511

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

1033

512

return

1034

513

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

1035

self.checker.terminate()

514

try:

515

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

516

#time.sleep(0.5)

517

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

518

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

519

except OSError, error:

520

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

521

raise

1036

522

self.checker = None

1037

523

1038

1039

def dbus_service_property(dbus_interface,

1040

signature="v",

1041

access="readwrite",

1042

byte_arrays=False):

524

def dbus_service_property(dbus_interface, signature="v",

525

access="readwrite", byte_arrays=False):

1043

526

"""Decorators for marking methods of a DBusObjectWithProperties to

1044

527

become properties on the D-Bus.

1045

528

1054

537

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

1055

538

if byte_arrays and signature != "ay":

1056

539

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

1057

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

1058

540

" signature %r" % signature)

1059

541

def decorator(func):

1060

542

func._dbus_is_property = True

1061

543

func._dbus_interface = dbus_interface

1066

548

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

1067

549

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1068

550

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

551

return decorator

1114

552

1115

553

1116

554

class DBusPropertyException(dbus.exceptions.DBusException):

1117

555

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

1118

556

"""

1119

pass

557

def __unicode__(self):

558

return unicode(str(self))

1120

559

1121

560

1122

561

class DBusPropertyAccessException(DBusPropertyException):

1131

570

pass

1132

571

1133

572

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):

573

class DBusObjectWithProperties(dbus.service.Object):

1224

574

"""A D-Bus object with properties.

1225

575

1226

576

Classes inheriting from this can use the dbus_service_property

1227

577

decorator to expose methods as D-Bus properties. It exposes the

1228

578

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

1229

579

"""

1230

580

581

@staticmethod

582

def _is_dbus_property(obj):

583

return getattr(obj, "_dbus_is_property", False)

584

585

def _get_all_dbus_properties(self):

586

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

587

"""

588

return ((prop._dbus_name, prop)

589

for name, prop in

590

inspect.getmembers(self, self._is_dbus_property))

591

1231

592

def _get_dbus_property(self, interface_name, property_name):

1232

593

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

1233

594

property with the specified name and interface.

1234

595

"""

1235

for cls in self.__class__.__mro__:

1236

for name, value in inspect.getmembers(

1237

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

1238

if (value._dbus_name == property_name

1239

and value._dbus_interface == interface_name):

1240

return value.__get__(self)

1241

596

for name in (property_name,

597

property_name + "_dbus_property"):

598

prop = getattr(self, name, None)

599

if (prop is None

600

or not self._is_dbus_property(prop)

601

or prop._dbus_name != property_name

602

or (interface_name and prop._dbus_interface

603

and interface_name != prop._dbus_interface)):

604

continue

605

return prop

1242

606

# 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",

607

raise DBusPropertyNotFound(self.dbus_object_path + ":"

608

+ interface_name + "."

609

+ property_name)

610

611

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

1257

612

out_signature="v")

1258

613

def Get(self, interface_name, property_name):

1259

614

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

1277

632

# The byte_arrays option is not supported yet on

1278

633

# signatures other than "ay".

1279

634

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))

635

raise ValueError

636

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

637

for byte in value))

1285

638

prop(value)

1286

639

1287

@dbus.service.method(dbus.PROPERTIES_IFACE,

1288

in_signature="s",

640

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

1289

641

out_signature="a{sv}")

1290

642

def GetAll(self, interface_name):

1291

643

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

1292

644

standard.

1293

645

1294

646

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

1295

647

"""

1296

properties = {}

1297

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

648

all = {}

649

for name, prop in self._get_all_dbus_properties():

1298

650

if (interface_name

1299

651

and interface_name != prop._dbus_interface):

1300

652

# Interface non-empty but did not match

1304

656

continue

1305

657

value = prop()

1306

658

if not hasattr(value, "variant_level"):

1307

properties[name] = value

659

all[name] = value

1308

660

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

661

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

662

value.variant_level+1)

663

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

1320

664

1321

665

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1322

666

out_signature="s",

1323

667

path_keyword='object_path',

1324

668

connection_keyword='connection')

1325

669

def Introspect(self, object_path, connection):

1326

"""Overloading of standard D-Bus method.

1327

1328

Inserts property tags and interface annotation tags.

670

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

1329

671

"""

1330

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1331

object_path,

1332

connection)

672

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

673

connection)

1333

674

try:

1334

675

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

1335

1336

676

def make_tag(document, name, prop):

1337

677

e = document.createElement("property")

1338

678

e.setAttribute("name", name)

1339

679

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

1340

680

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

1341

681

return e

1342

1343

682

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

1344

# Add property tags

1345

683

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

1346

684

for name, prop

1347

in self._get_all_dbus_things("property")

685

in self._get_all_dbus_properties()

1348

686

if prop._dbus_interface

1349

687

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

1350

688

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

689

# Add the names to the return values for the

1368

690

# "org.freedesktop.DBus.Properties" methods

1369

691

if (if_tag.getAttribute("name")

1382

704

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

1383

705

document.unlink()

1384

706

except (AttributeError, xml.dom.DOMException,

1385

xml.parsers.expat.ExpatError) as error:

1386

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):

1460

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

1461

if dt is None:

1462

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).

1488

"""

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):

1497

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

1498

# with the wrong interface name

1499

if (not hasattr(attribute, "_dbus_interface")

1500

or not attribute._dbus_interface.startswith(

1501

orig_interface_name)):

1502

continue

1503

# Create an alternate D-Bus interface name based on

1504

# the current name

1505

alt_interface = attribute._dbus_interface.replace(

1506

orig_interface_name, alt_interface_name)

1507

interface_names.add(alt_interface)

1508

# Is this a D-Bus signal?

1509

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(

1514

zip(attribute.func_code.co_freevars,

1515

attribute.__closure__))

1516

["func"].cell_contents)

1517

else:

1518

nonmethod_func = attribute

1519

# Create a new, but exactly alike, function

1520

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

1521

# 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

1545

# 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

1549

def fixscope(func1, func2):

1550

"""This function is a scope container to pass

1551

func1 and func2 to the "call_both" function

1552

outside of its arguments"""

1553

1554

@functools.wraps(func2)

1555

def call_both(*args, **kwargs):

1556

"""This function will emit two D-Bus

1557

signals by calling func1 and func2"""

1558

func1(*args, **kwargs)

1559

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

return call_both

1566

# Create the "call_both" function and add it to

1567

# the class

1568

attr[attrname] = fixscope(attribute, new_function)

1569

# Is this a D-Bus method?

1570

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

1571

# Create a new, but exactly alike, function

1572

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

1573

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

1574

# 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

1591

# Is this a D-Bus property?

1592

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

1593

# Create a new, but exactly alike, function

1594

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

1595

# property with the alternate D-Bus interface

1596

# 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"})

707

xml.parsers.expat.ExpatError), error:

708

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

709

error)

710

return xmlstring

711

712

1654

713

class ClientDBus(Client, DBusObjectWithProperties):

1655

714

"""A Client class using D-Bus

1656

715

1660

719

"""

1661

720

1662

721

runtime_expansions = (Client.runtime_expansions

1663

+ ("dbus_object_path", ))

1664

1665

_interface = "se.recompile.Mandos.Client"

722

+ ("dbus_object_path",))

1666

723

1667

724

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

1668

725

1669

726

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

727

self._approvals_pending = 0

1670

728

self.bus = bus

1671

729

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

1672

730

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

1673

731

# the D-Bus

1674

client_object_name = str(self.name).translate(

732

client_object_name = unicode(self.name).translate(

1675

733

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

1676

734

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

1677

self.dbus_object_path = dbus.ObjectPath(

1678

"/clients/" + client_object_name)

735

self.dbus_object_path = (dbus.ObjectPath

736

("/clients/" + client_object_name))

1679

737

DBusObjectWithProperties.__init__(self, self.bus,

1680

738

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):

1687

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

1688

its changes to DBus.

1689

1690

transform_fun: Function that takes a value and a variant_level

1691

and transforms it to a D-Bus type.

1692

dbus_name: D-Bus name of the variable

1693

type_func: Function that transform the value before sending it

1694

to the D-Bus. Default: no transform

1695

variant_level: D-Bus variant level. Default: 1

1696

"""

1697

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

1698

1699

def setter(self, value):

1700

if hasattr(self, "dbus_object_path"):

1701

if (not hasattr(self, attrname) or

1702

type_func(getattr(self, attrname, None))

1703

!= 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())

1719

setattr(self, attrname, value)

1720

1721

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

1722

1723

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1724

approvals_pending = notifychangeproperty(dbus.Boolean,

1725

"ApprovalPending",

1726

type_func = bool)

1727

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

1728

last_enabled = notifychangeproperty(datetime_to_dbus,

1729

"LastEnabled")

1730

checker = notifychangeproperty(

1731

dbus.Boolean, "CheckerRunning",

1732

type_func = lambda checker: checker is not None)

1733

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1734

"LastCheckedOK")

1735

last_checker_status = notifychangeproperty(dbus.Int16,

1736

"LastCheckerStatus")

1737

last_approval_request = notifychangeproperty(

1738

datetime_to_dbus, "LastApprovalRequest")

1739

approved_by_default = notifychangeproperty(dbus.Boolean,

1740

"ApprovedByDefault")

1741

approval_delay = notifychangeproperty(

1742

dbus.UInt64, "ApprovalDelay",

1743

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

1744

approval_duration = notifychangeproperty(

1745

dbus.UInt64, "ApprovalDuration",

1746

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

1747

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

1748

timeout = notifychangeproperty(

1749

dbus.UInt64, "Timeout",

1750

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

1751

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)

1757

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

1758

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

1759

invalidate_only=True)

1760

1761

del notifychangeproperty

739

740

def _get_approvals_pending(self):

741

return self._approvals_pending

742

def _set_approvals_pending(self, value):

743

old_value = self._approvals_pending

744

self._approvals_pending = value

745

bval = bool(value)

746

if (hasattr(self, "dbus_object_path")

747

and bval is not bool(old_value)):

748

dbus_bool = dbus.Boolean(bval, variant_level=1)

749

self.PropertyChanged(dbus.String("ApprovalPending"),

750

dbus_bool)

751

752

approvals_pending = property(_get_approvals_pending,

753

_set_approvals_pending)

754

del _get_approvals_pending, _set_approvals_pending

755

756

@staticmethod

757

def _datetime_to_dbus(dt, variant_level=0):

758

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

759

return dbus.String(dt.isoformat(),

760

variant_level=variant_level)

761

762

def enable(self):

763

oldstate = getattr(self, "enabled", False)

764

r = Client.enable(self)

765

if oldstate != self.enabled:

766

# Emit D-Bus signals

767

self.PropertyChanged(dbus.String("Enabled"),

768

dbus.Boolean(True, variant_level=1))

769

self.PropertyChanged(

770

dbus.String("LastEnabled"),

771

self._datetime_to_dbus(self.last_enabled,

772

variant_level=1))

773

return r

774

775

def disable(self, quiet = False):

776

oldstate = getattr(self, "enabled", False)

777

r = Client.disable(self, quiet=quiet)

778

if not quiet and oldstate != self.enabled:

779

# Emit D-Bus signal

780

self.PropertyChanged(dbus.String("Enabled"),

781

dbus.Boolean(False, variant_level=1))

782

return r

1762

783

1763

784

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

1764

785

try:

1769

790

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

1770

791

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

1771

792

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:

793

def checker_callback(self, pid, condition, command,

794

*args, **kwargs):

795

self.checker_callback_tag = None

796

self.checker = None

797

# Emit D-Bus signal

798

self.PropertyChanged(dbus.String("CheckerRunning"),

799

dbus.Boolean(False, variant_level=1))

800

if os.WIFEXITED(condition):

801

exitstatus = os.WEXITSTATUS(condition)

1779

802

# Emit D-Bus signal

1780

803

self.CheckerCompleted(dbus.Int16(exitstatus),

1781

# This is specific to GNU libC

1782

dbus.Int64(exitstatus << 8),

804

dbus.Int64(condition),

1783

805

dbus.String(command))

1784

806

else:

1785

807

# Emit D-Bus signal

1786

808

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

1787

dbus.Int64(

1788

# This is specific to GNU libC

1789

(exitstatus << 8)

1790

| self.last_checker_signal),

809

dbus.Int64(condition),

1791

810

dbus.String(command))

1792

return ret

811

812

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

813

*args, **kwargs)

814

815

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

816

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

817

# Emit D-Bus signal

818

self.PropertyChanged(

819

dbus.String("LastCheckedOK"),

820

(self._datetime_to_dbus(self.last_checked_ok,

821

variant_level=1)))

822

return r

823

824

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

825

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

826

# Emit D-Bus signal

827

self.PropertyChanged(

828

dbus.String("LastApprovalRequest"),

829

(self._datetime_to_dbus(self.last_approval_request,

830

variant_level=1)))

831

return r

1793

832

1794

833

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

1795

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

834

old_checker = self.checker

835

if self.checker is not None:

836

old_checker_pid = self.checker.pid

837

else:

838

old_checker_pid = None

1796

839

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

1797

840

# Only if new checker process was started

1798

841

if (self.checker is not None

1799

842

and old_checker_pid != self.checker.pid):

1800

843

# Emit D-Bus signal

1801

844

self.CheckerStarted(self.current_checker_command)

845

self.PropertyChanged(

846

dbus.String("CheckerRunning"),

847

dbus.Boolean(True, variant_level=1))

1802

848

return r

1803

849

850

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

851

old_checker = getattr(self, "checker", None)

852

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

853

if (old_checker is not None

854

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

855

self.PropertyChanged(dbus.String("CheckerRunning"),

856

dbus.Boolean(False, variant_level=1))

857

return r

858

1804

859

def _reset_approved(self):

1805

self.approved = None

860

self._approved = None

1806

861

return False

1807

862

1808

863

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

864

self.send_changedstate()

865

self._approved = value

866

gobject.timeout_add(self._timedelta_to_milliseconds

867

(self.approval_duration),

868

self._reset_approved)

869

1813

870

1814

871

## D-Bus methods, signals & properties

1815

1816

## Interfaces

872

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

1817

873

1818

874

## Signals

1819

875

1830

886

pass

1831

887

1832

888

# PropertyChanged - signal

1833

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

1834

889

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

1835

890

def PropertyChanged(self, property, value):

1836

891

"D-Bus signal"

1867

922

# CheckedOK - method

1868

923

@dbus.service.method(_interface)

1869

924

def CheckedOK(self):

1870

self.checked_ok()

925

return self.checked_ok()

1871

926

1872

927

# Enable - method

1873

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

1874

928

@dbus.service.method(_interface)

1875

929

def Enable(self):

1876

930

"D-Bus method"

1877

931

self.enable()

1878

932

1879

933

# StartChecker - method

1880

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

1881

934

@dbus.service.method(_interface)

1882

935

def StartChecker(self):

1883

936

"D-Bus method"

1884

937

self.start_checker()

1885

938

1886

939

# Disable - method

1887

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

1888

940

@dbus.service.method(_interface)

1889

941

def Disable(self):

1890

942

"D-Bus method"

1891

943

self.disable()

1892

944

1893

945

# StopChecker - method

1894

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

1895

946

@dbus.service.method(_interface)

1896

947

def StopChecker(self):

1897

948

self.stop_checker()

1904

955

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

1905

956

1906

957

# ApprovedByDefault - property

1907

@dbus_service_property(_interface,

1908

signature="b",

958

@dbus_service_property(_interface, signature="b",

1909

959

access="readwrite")

1910

960

def ApprovedByDefault_dbus_property(self, value=None):

1911

961

if value is None: # get

1912

962

return dbus.Boolean(self.approved_by_default)

1913

963

self.approved_by_default = bool(value)

964

# Emit D-Bus signal

965

self.PropertyChanged(dbus.String("ApprovedByDefault"),

966

dbus.Boolean(value, variant_level=1))

1914

967

1915

968

# ApprovalDelay - property

1916

@dbus_service_property(_interface,

1917

signature="t",

969

@dbus_service_property(_interface, signature="t",

1918

970

access="readwrite")

1919

971

def ApprovalDelay_dbus_property(self, value=None):

1920

972

if value is None: # get

1921

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

1922

* 1000)

973

return dbus.UInt64(self.approval_delay_milliseconds())

1923

974

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

975

# Emit D-Bus signal

976

self.PropertyChanged(dbus.String("ApprovalDelay"),

977

dbus.UInt64(value, variant_level=1))

1924

978

1925

979

# ApprovalDuration - property

1926

@dbus_service_property(_interface,

1927

signature="t",

980

@dbus_service_property(_interface, signature="t",

1928

981

access="readwrite")

1929

982

def ApprovalDuration_dbus_property(self, value=None):

1930

983

if value is None: # get

1931

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

1932

* 1000)

984

return dbus.UInt64(self._timedelta_to_milliseconds(

985

self.approval_duration))

1933

986

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

987

# Emit D-Bus signal

988

self.PropertyChanged(dbus.String("ApprovalDuration"),

989

dbus.UInt64(value, variant_level=1))

1934

990

1935

991

# Name - property

1936

@dbus_annotations(

1937

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

1938

992

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

1939

993

def Name_dbus_property(self):

1940

994

return dbus.String(self.name)

1941

995

1942

996

# Fingerprint - property

1943

@dbus_annotations(

1944

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

1945

997

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

1946

998

def Fingerprint_dbus_property(self):

1947

999

return dbus.String(self.fingerprint)

1948

1000

1949

1001

# Host - property

1950

@dbus_service_property(_interface,

1951

signature="s",

1002

@dbus_service_property(_interface, signature="s",

1952

1003

access="readwrite")

1953

1004

def Host_dbus_property(self, value=None):

1954

1005

if value is None: # get

1955

1006

return dbus.String(self.host)

1956

self.host = str(value)

1007

self.host = value

1008

# Emit D-Bus signal

1009

self.PropertyChanged(dbus.String("Host"),

1010

dbus.String(value, variant_level=1))

1957

1011

1958

1012

# Created - property

1959

@dbus_annotations(

1960

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

1961

1013

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

1962

1014

def Created_dbus_property(self):

1963

return datetime_to_dbus(self.created)

1015

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

1964

1016

1965

1017

# LastEnabled - property

1966

1018

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

1967

1019

def LastEnabled_dbus_property(self):

1968

return datetime_to_dbus(self.last_enabled)

1020

if self.last_enabled is None:

1021

return dbus.String("")

1022

return dbus.String(self._datetime_to_dbus(self.last_enabled))

1969

1023

1970

1024

# Enabled - property

1971

@dbus_service_property(_interface,

1972

signature="b",

1025

@dbus_service_property(_interface, signature="b",

1973

1026

access="readwrite")

1974

1027

def Enabled_dbus_property(self, value=None):

1975

1028

if value is None: # get

1980

1033

self.disable()

1981

1034

1982

1035

# LastCheckedOK - property

1983

@dbus_service_property(_interface,

1984

signature="s",

1036

@dbus_service_property(_interface, signature="s",

1985

1037

access="readwrite")

1986

1038

def LastCheckedOK_dbus_property(self, value=None):

1987

1039

if value is not None:

1988

1040

self.checked_ok()

1989

1041

return

1990

return datetime_to_dbus(self.last_checked_ok)

1991

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

# Expires - property

1998

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

1999

def Expires_dbus_property(self):

2000

return datetime_to_dbus(self.expires)

1042

if self.last_checked_ok is None:

1043

return dbus.String("")

1044

return dbus.String(self._datetime_to_dbus(self

1045

.last_checked_ok))

2001

1046

2002

1047

# LastApprovalRequest - property

2003

1048

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

2004

1049

def LastApprovalRequest_dbus_property(self):

2005

return datetime_to_dbus(self.last_approval_request)

1050

if self.last_approval_request is None:

1051

return dbus.String("")

1052

return dbus.String(self.

1053

_datetime_to_dbus(self

1054

.last_approval_request))

2006

1055

2007

1056

# Timeout - property

2008

@dbus_service_property(_interface,

2009

signature="t",

1057

@dbus_service_property(_interface, signature="t",

2010

1058

access="readwrite")

2011

1059

def Timeout_dbus_property(self, value=None):

2012

1060

if value is None: # get

2013

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

2014

old_timeout = self.timeout

1061

return dbus.UInt64(self.timeout_milliseconds())

2015

1062

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)

2031

2032

# ExtendedTimeout - property

2033

@dbus_service_property(_interface,

2034

signature="t",

2035

access="readwrite")

2036

def ExtendedTimeout_dbus_property(self, value=None):

2037

if value is None: # get

2038

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

2039

* 1000)

2040

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

1063

# Emit D-Bus signal

1064

self.PropertyChanged(dbus.String("Timeout"),

1065

dbus.UInt64(value, variant_level=1))

1066

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

1067

return

1068

# Reschedule timeout

1069

gobject.source_remove(self.disable_initiator_tag)

1070

self.disable_initiator_tag = None

1071

time_to_die = (self.

1072

_timedelta_to_milliseconds((self

1073

.last_checked_ok

1074

+ self.timeout)

1075

- datetime.datetime

1076

.utcnow()))

1077

if time_to_die <= 0:

1078

# The timeout has passed

1079

self.disable()

1080

else:

1081

self.disable_initiator_tag = (gobject.timeout_add

1082

(time_to_die, self.disable))

2041

1083

2042

1084

# Interval - property

2043

@dbus_service_property(_interface,

2044

signature="t",

1085

@dbus_service_property(_interface, signature="t",

2045

1086

access="readwrite")

2046

1087

def Interval_dbus_property(self, value=None):

2047

1088

if value is None: # get

2048

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

1089

return dbus.UInt64(self.interval_milliseconds())

2049

1090

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

1091

# Emit D-Bus signal

1092

self.PropertyChanged(dbus.String("Interval"),

1093

dbus.UInt64(value, variant_level=1))

2050

1094

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

2051

1095

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

2058

1096

# Reschedule checker run

1097

gobject.source_remove(self.checker_initiator_tag)

1098

self.checker_initiator_tag = (gobject.timeout_add

1099

(value, self.start_checker))

1100

self.start_checker() # Start one now, too

1101

2059

1102

# Checker - property

2060

@dbus_service_property(_interface,

2061

signature="s",

1103

@dbus_service_property(_interface, signature="s",

2062

1104

access="readwrite")

2063

1105

def Checker_dbus_property(self, value=None):

2064

1106

if value is None: # get

2065

1107

return dbus.String(self.checker_command)

2066

self.checker_command = str(value)

1108

self.checker_command = value

1109

# Emit D-Bus signal

1110

self.PropertyChanged(dbus.String("Checker"),

1111

dbus.String(self.checker_command,

1112

variant_level=1))

2067

1113

2068

1114

# CheckerRunning - property

2069

@dbus_service_property(_interface,

2070

signature="b",

1115

@dbus_service_property(_interface, signature="b",

2071

1116

access="readwrite")

2072

1117

def CheckerRunning_dbus_property(self, value=None):

2073

1118

if value is None: # get

2078

1123

self.stop_checker()

2079

1124

2080

1125

# ObjectPath - property

2081

@dbus_annotations(

2082

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

2083

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

2084

1126

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

2085

1127

def ObjectPath_dbus_property(self):

2086

1128

return self.dbus_object_path # is already a dbus.ObjectPath

2087

1129

2088

1130

# 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)

1131

@dbus_service_property(_interface, signature="ay",

1132

access="write", byte_arrays=True)

2096

1133

def Secret_dbus_property(self, value):

2097

self.secret = bytes(value)

1134

self.secret = str(value)

2098

1135

2099

1136

del _interface

2100

1137

2104

1141

self._pipe = child_pipe

2105

1142

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

2106

1143

if not self._pipe.recv():

2107

raise KeyError(fpr)

2108

1144

raise KeyError()

1145

2109

1146

def __getattribute__(self, name):

2110

if name == '_pipe':

1147

if(name == '_pipe'):

2111

1148

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

2112

1149

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

2113

1150

data = self._pipe.recv()

2114

1151

if data[0] == 'data':

2115

1152

return data[1]

2116

1153

if data[0] == 'function':

2117

2118

1154

def func(*args, **kwargs):

2119

1155

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

2120

1156

return self._pipe.recv()[1]

2121

2122

1157

return func

2123

1158

2124

1159

def __setattr__(self, name, value):

2125

if name == '_pipe':

1160

if(name == '_pipe'):

2126

1161

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

2127

1162

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

2128

1163

2136

1171

def handle(self):

2137

1172

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

2138

1173

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

2139

str(self.client_address))

1174

unicode(self.client_address))

2140

1175

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

2141

1176

self.server.child_pipe.fileno())

2142

2143

session = gnutls.ClientSession(self.request)

2144

1177

1178

session = (gnutls.connection

1179

.ClientSession(self.request,

1180

gnutls.connection

1181

.X509Credentials()))

1182

1183

# Note: gnutls.connection.X509Credentials is really a

1184

# generic GnuTLS certificate credentials object so long as

1185

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

1186

# here despite using OpenPGP certificates.

1187

2145

1188

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

2146

1189

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

2147

1190

# "+COMP-NULL", "+CTYPE-OPENPGP",

2150

1193

priority = self.server.gnutls_priority

2151

1194

if priority is None:

2152

1195

priority = "NORMAL"

2153

gnutls.priority_set_direct(session._c_object, priority,

2154

None)

2155

1196

(gnutls.library.functions

1197

.gnutls_priority_set_direct(session._c_object,

1198

priority, None))

1199

2156

1200

# Start communication using the Mandos protocol

2157

1201

# Get protocol number

2158

1202

line = self.request.makefile().readline()

2159

1203

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

2160

1204

try:

2161

1205

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

2162

raise RuntimeError(line)

2163

except (ValueError, IndexError, RuntimeError) as error:

1206

raise RuntimeError

1207

except (ValueError, IndexError, RuntimeError), error:

2164

1208

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

2165

1209

return

2166

1210

2167

1211

# Start GnuTLS connection

2168

1212

try:

2169

1213

session.handshake()

2170

except gnutls.Error as error:

1214

except gnutls.errors.GNUTLSError, error:

2171

1215

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

2172

1216

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

2173

1217

# established. Just abandon the request.

2174

1218

return

2175

1219

logger.debug("Handshake succeeded")

2176

1220

2177

1221

approval_required = False

2178

1222

try:

2179

1223

try:

2180

fpr = self.fingerprint(

2181

self.peer_certificate(session))

2182

except (TypeError, gnutls.Error) as error:

1224

fpr = self.fingerprint(self.peer_certificate

1225

(session))

1226

except (TypeError, gnutls.errors.GNUTLSError), error:

2183

1227

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

2184

1228

return

2185

1229

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

2186

1230

2187

1231

try:

2188

1232

client = ProxyClient(child_pipe, fpr,

2189

1233

self.client_address)

2197

1241

2198

1242

while True:

2199

1243

if not client.enabled:

2200

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

2201

client.name)

1244

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

1245

client.name)

2202

1246

if self.server.use_dbus:

2203

1247

# Emit D-Bus signal

2204

client.Rejected("Disabled")

1248

client.Rejected("Disabled")

2205

1249

return

2206

1250

2207

if client.approved or not client.approval_delay:

1251

if client._approved or not client.approval_delay:

2208

1252

#We are approved or approval is disabled

2209

1253

break

2210

elif client.approved is None:

1254

elif client._approved is None:

2211

1255

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

2212

1256

client.name)

2213

1257

if self.server.use_dbus:

2214

1258

# Emit D-Bus signal

2215

1259

client.NeedApproval(

2216

client.approval_delay.total_seconds()

2217

* 1000, client.approved_by_default)

1260

client.approval_delay_milliseconds(),

1261

client.approved_by_default)

2218

1262

else:

2219

1263

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

2220

1264

client.name)

2224

1268

return

2225

1269

2226

1270

#wait until timeout or approved

1271

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

2227

1272

time = datetime.datetime.now()

2228

1273

client.changedstate.acquire()

2229

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

1274

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

2230

1275

client.changedstate.release()

2231

1276

time2 = datetime.datetime.now()

2232

1277

if (time2 - time) >= delay:

2243

1288

else:

2244

1289

delay -= time2 - time

2245

1290

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

2252

1291

sent_size = 0

1292

while sent_size < len(client.secret):

1293

try:

1294

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

1295

except (gnutls.errors.GNUTLSError), error:

1296

logger.warning("gnutls send failed")

1297

return

1298

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

1299

sent, len(client.secret)

1300

- (sent_size + sent))

1301

sent_size += sent

1302

2253

1303

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

2254

# bump the timeout using extended_timeout

2255

client.bump_timeout(client.extended_timeout)

1304

# bump the timeout as if seen

1305

client.checked_ok()

2256

1306

if self.server.use_dbus:

2257

1307

# Emit D-Bus signal

2258

1308

client.GotSecret()

2262

1312

client.approvals_pending -= 1

2263

1313

try:

2264

1314

session.bye()

2265

except gnutls.Error as error:

2266

logger.warning("GnuTLS bye failed",

2267

exc_info=error)

1315

except (gnutls.errors.GNUTLSError), error:

1316

logger.warning("GnuTLS bye failed")

2268

1317

2269

1318

@staticmethod

2270

1319

def peer_certificate(session):

2271

1320

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

2272

1321

# 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""

1322

if (gnutls.library.functions

1323

.gnutls_certificate_type_get(session._c_object)

1324

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1325

# ...do the normal thing

1326

return session.peer_certificate

2277

1327

list_size = ctypes.c_uint(1)

2278

cert_list = (gnutls.certificate_get_peers

1328

cert_list = (gnutls.library.functions

1329

.gnutls_certificate_get_peers

2279

1330

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

2280

1331

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

2281

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

1332

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

1333

" certificate")

2282

1334

if list_size.value == 0:

2283

1335

return None

2284

1336

cert = cert_list[0]

2288

1340

def fingerprint(openpgp):

2289

1341

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2290

1342

# 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)))

1343

datum = (gnutls.library.types

1344

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

1345

ctypes.POINTER

1346

(ctypes.c_ubyte)),

1347

ctypes.c_uint(len(openpgp))))

2295

1348

# New empty GnuTLS certificate

2296

crt = gnutls.openpgp_crt_t()

2297

gnutls.openpgp_crt_init(ctypes.byref(crt))

1349

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1350

(gnutls.library.functions

1351

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2298

1352

# Import the OpenPGP public key into the certificate

2299

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

2300

gnutls.OPENPGP_FMT_RAW)

1353

(gnutls.library.functions

1354

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

1355

gnutls.library.constants

1356

.GNUTLS_OPENPGP_FMT_RAW))

2301

1357

# Verify the self signature in the key

2302

1358

crtverify = ctypes.c_uint()

2303

gnutls.openpgp_crt_verify_self(crt, 0,

2304

ctypes.byref(crtverify))

1359

(gnutls.library.functions

1360

.gnutls_openpgp_crt_verify_self(crt, 0,

1361

ctypes.byref(crtverify)))

2305

1362

if crtverify.value != 0:

2306

gnutls.openpgp_crt_deinit(crt)

2307

raise gnutls.CertificateSecurityError("Verify failed")

1363

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1364

raise (gnutls.errors.CertificateSecurityError

1365

("Verify failed"))

2308

1366

# New buffer for the fingerprint

2309

1367

buf = ctypes.create_string_buffer(20)

2310

1368

buf_len = ctypes.c_size_t()

2311

1369

# Get the fingerprint from the certificate into the buffer

2312

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

2313

ctypes.byref(buf_len))

1370

(gnutls.library.functions

1371

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

1372

ctypes.byref(buf_len)))

2314

1373

# Deinit the certificate

2315

gnutls.openpgp_crt_deinit(crt)

1374

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2316

1375

# Convert the buffer to a Python bytestring

2317

1376

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

2318

1377

# Convert the bytestring to hexadecimal notation

2319

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

1378

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

2320

1379

return hex_fpr

2321

1380

2322

1381

2323

1382

class MultiprocessingMixIn(object):

2324

1383

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

2325

2326

1384

def sub_process_main(self, request, address):

2327

1385

try:

2328

1386

self.finish_request(request, address)

2329

except Exception:

1387

except:

2330

1388

self.handle_error(request, address)

2331

1389

self.close_request(request)

2332

1390

2333

1391

def process_request(self, request, address):

2334

1392

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

2335

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

2336

args = (request, address))

2337

proc.start()

2338

return proc

2339

1393

multiprocessing.Process(target = self.sub_process_main,

1394

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

2340

1395

2341

1396

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2342

1397

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

2343

2344

1398

def process_request(self, request, client_address):

2345

1399

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

2346

1400

2347

1401

This function creates a new pipe in self.pipe

2348

1402

"""

2349

1403

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2350

2351

proc = MultiprocessingMixIn.process_request(self, request,

2352

client_address)

1404

1405

super(MultiprocessingMixInWithPipe,

1406

self).process_request(request, client_address)

2353

1407

self.child_pipe.close()

2354

self.add_pipe(parent_pipe, proc)

2355

2356

def add_pipe(self, parent_pipe, proc):

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

2357

1411

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

2358

raise NotImplementedError()

2359

1412

raise NotImplementedError

2360

1413

2361

1414

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2362

1415

socketserver.TCPServer, object):

2367

1420

interface: None or a network interface name (string)

2368

1421

use_ipv6: Boolean; to use IPv6 or not

2369

1422

"""

2370

2371

1423

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

"""

1424

interface=None, use_ipv6=True):

2378

1425

self.interface = interface

2379

1426

if use_ipv6:

2380

1427

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

1428

socketserver.TCPServer.__init__(self, server_address,

2408

1429

RequestHandlerClass)

2409

2410

1430

def server_bind(self):

2411

1431

"""This overrides the normal server_bind() function

2412

1432

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

2418

1438

self.interface)

2419

1439

else:

2420

1440

try:

2421

self.socket.setsockopt(

2422

socket.SOL_SOCKET, SO_BINDTODEVICE,

2423

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

2424

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:

1441

self.socket.setsockopt(socket.SOL_SOCKET,

1442

SO_BINDTODEVICE,

1443

str(self.interface

1444

+ '\0'))

1445

except socket.error, error:

1446

if error[0] == errno.EPERM:

1447

logger.error("No permission to"

1448

" bind to interface %s",

1449

self.interface)

1450

elif error[0] == errno.ENOPROTOOPT:

2429

1451

logger.error("SO_BINDTODEVICE not available;"

2430

1452

" cannot bind to interface %s",

2431

1453

self.interface)

2432

elif error.errno == errno.ENODEV:

2433

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

2434

" cannot bind", self.interface)

2435

1454

else:

2436

1455

raise

2437

1456

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

2440

1459

if self.address_family == socket.AF_INET6:

2441

1460

any_address = "::" # in6addr_any

2442

1461

else:

2443

any_address = "0.0.0.0" # INADDR_ANY

1462

any_address = socket.INADDR_ANY

2444

1463

self.server_address = (any_address,

2445

1464

self.server_address[1])

2446

1465

elif not self.server_address[1]:

2447

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

1466

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

1467

0)

2448

1468

# if self.interface:

2449

1469

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

2450

1470

# 0, # port

2464

1484

2465

1485

Assumes a gobject.MainLoop event loop.

2466

1486

"""

2467

2468

1487

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):

1488

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

1489

gnutls_priority=None, use_dbus=True):

2475

1490

self.enabled = False

2476

1491

self.clients = clients

2477

1492

if self.clients is None:

2478

self.clients = {}

1493

self.clients = set()

2479

1494

self.use_dbus = use_dbus

2480

1495

self.gnutls_priority = gnutls_priority

2481

1496

IPv6_TCPServer.__init__(self, server_address,

2482

1497

RequestHandlerClass,

2483

1498

interface = interface,

2484

use_ipv6 = use_ipv6,

2485

socketfd = socketfd)

2486

1499

use_ipv6 = use_ipv6)

2487

1500

def server_activate(self):

2488

1501

if self.enabled:

2489

1502

return socketserver.TCPServer.server_activate(self)

2490

2491

1503

def enable(self):

2492

1504

self.enabled = True

2493

2494

def add_pipe(self, parent_pipe, proc):

1505

def add_pipe(self, parent_pipe):

2495

1506

# 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))

2502

2503

def handle_ipc(self, source, condition,

2504

parent_pipe=None,

2505

proc = None,

1507

gobject.io_add_watch(parent_pipe.fileno(),

1508

gobject.IO_IN | gobject.IO_HUP,

1509

functools.partial(self.handle_ipc,

1510

parent_pipe = parent_pipe))

1511

1512

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

2506

1513

client_object=None):

2507

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

2508

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

2509

# Wait for other process to exit

2510

proc.join()

1514

condition_names = {

1515

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

1516

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

1517

# blocking).

1518

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

1519

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

1520

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

1521

# broken, usually for pipes and

1522

# sockets).

1523

}

1524

conditions_string = ' | '.join(name

1525

for cond, name in

1526

condition_names.iteritems()

1527

if cond & condition)

1528

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

1529

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

2511

1530

return False

2512

1531

2513

1532

# Read a request from the child

2518

1537

fpr = request[1]

2519

1538

address = request[2]

2520

1539

2521

for c in self.clients.itervalues():

1540

for c in self.clients:

2522

1541

if c.fingerprint == fpr:

2523

1542

client = c

2524

1543

break

2525

1544

else:

2526

logger.info("Client not found for fingerprint: %s, ad"

2527

"dress: %s", fpr, address)

1545

logger.warning("Client not found for fingerprint: %s, ad"

1546

"dress: %s", fpr, address)

2528

1547

if self.use_dbus:

2529

1548

# Emit D-Bus signal

2530

mandos_dbus_service.ClientNotFound(fpr,

2531

address[0])

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

2532

1550

parent_pipe.send(False)

2533

1551

return False

2534

1552

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))

1553

gobject.io_add_watch(parent_pipe.fileno(),

1554

gobject.IO_IN | gobject.IO_HUP,

1555

functools.partial(self.handle_ipc,

1556

parent_pipe = parent_pipe,

1557

client_object = client))

2542

1558

parent_pipe.send(True)

2543

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

2544

# same fileno

1559

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

2545

1560

return False

2546

1561

if command == 'funcall':

2547

1562

funcname = request[1]

2548

1563

args = request[2]

2549

1564

kwargs = request[3]

2550

1565

2551

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

2552

funcname)(*args,

2553

**kwargs)))

2554

1566

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

1567

2555

1568

if command == 'getattr':

2556

1569

attrname = request[1]

2557

if isinstance(client_object.__getattribute__(attrname),

2558

collections.Callable):

2559

parent_pipe.send(('function', ))

1570

if callable(client_object.__getattribute__(attrname)):

1571

parent_pipe.send(('function',))

2560

1572

else:

2561

parent_pipe.send((

2562

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

1573

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

2563

1574

2564

1575

if command == 'setattr':

2565

1576

attrname = request[1]

2566

1577

value = request[2]

2567

1578

setattr(client_object, attrname, value)

2568

1579

2569

1580

return True

2570

1581

2571

1582

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

1583

def string_to_delta(interval):

2669

1584

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

2670

1585

2681

1596

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

2682

1597

datetime.timedelta(0, 330)

2683

1598

"""

2684

2685

try:

2686

return rfc3339_duration_to_delta(interval)

2687

except ValueError:

2688

pass

2689

2690

1599

timevalue = datetime.timedelta(0)

2691

1600

for s in interval.split():

2692

1601

try:

2693

suffix = s[-1]

1602

suffix = unicode(s[-1])

2694

1603

value = int(s[:-1])

2695

1604

if suffix == "d":

2696

1605

delta = datetime.timedelta(value)

2703

1612

elif suffix == "w":

2704

1613

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

2705

1614

else:

2706

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

2707

except IndexError as e:

1615

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

1616

except (ValueError, IndexError), e:

2708

1617

raise ValueError(*(e.args))

2709

1618

timevalue += delta

2710

1619

return timevalue

2711

1620

2712

1621

1622

def if_nametoindex(interface):

1623

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

1624

1625

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

1626

global if_nametoindex

1627

try:

1628

if_nametoindex = (ctypes.cdll.LoadLibrary

1629

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

1630

.if_nametoindex)

1631

except (OSError, AttributeError):

1632

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

1633

def if_nametoindex(interface):

1634

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

1635

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

1636

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

1637

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1638

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

1639

interface))

1640

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

1641

ifreq[16:20])[0]

1642

return interface_index

1643

return if_nametoindex(interface)

1644

1645

2713

1646

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

2714

1647

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

2715

1648

2723

1656

sys.exit()

2724

1657

if not noclose:

2725

1658

# Close all standard open file descriptors

2726

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

1659

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

2727

1660

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

2728

1661

raise OSError(errno.ENODEV,

2729

"{} not a character device"

2730

.format(os.devnull))

1662

"%s not a character device"

1663

% os.path.devnull)

2731

1664

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

2732

1665

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

2733

1666

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

2740

1673

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

2741

1674

# Parsing of options, both command line and config file

2742

1675

2743

parser = argparse.ArgumentParser()

2744

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

2745

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

2746

help="show version number and exit")

2747

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

2748

help="Bind to interface IF")

2749

parser.add_argument("-a", "--address",

2750

help="Address to listen for requests on")

2751

parser.add_argument("-p", "--port", type=int,

2752

help="Port number to receive requests on")

2753

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

2754

help="Run self-test")

2755

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

2756

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

2757

" to terminal", default=None)

2758

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

2759

help="Debug level for stdout output")

2760

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

2761

" priority string (see GnuTLS documentation)")

2762

parser.add_argument("--servicename",

2763

metavar="NAME", help="Zeroconf service name")

2764

parser.add_argument("--configdir",

2765

default="/etc/mandos", metavar="DIR",

2766

help="Directory to search for configuration"

2767

" files")

2768

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

2769

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

2770

" system bus interface", default=None)

2771

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

2772

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

2773

default=None)

2774

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

2788

options = parser.parse_args()

1676

parser = optparse.OptionParser(version = "%%prog %s" % version)

1677

parser.add_option("-i", "--interface", type="string",

1678

metavar="IF", help="Bind to interface IF")

1679

parser.add_option("-a", "--address", type="string",

1680

help="Address to listen for requests on")

1681

parser.add_option("-p", "--port", type="int",

1682

help="Port number to receive requests on")

1683

parser.add_option("--check", action="store_true",

1684

help="Run self-test")

1685

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

1686

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

1687

" terminal")

1688

parser.add_option("--debuglevel", type="string", metavar="LEVEL",

1689

help="Debug level for stdout output")

1690

parser.add_option("--priority", type="string", help="GnuTLS"

1691

" priority string (see GnuTLS documentation)")

1692

parser.add_option("--servicename", type="string",

1693

metavar="NAME", help="Zeroconf service name")

1694

parser.add_option("--configdir", type="string",

1695

default="/etc/mandos", metavar="DIR",

1696

help="Directory to search for configuration"

1697

" files")

1698

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

1699

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

1700

" system bus interface")

1701

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

1702

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

1703

options = parser.parse_args()[0]

2789

1704

2790

1705

if options.check:

2791

1706

import doctest

2792

fail_count, test_count = doctest.testmod()

2793

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

1707

doctest.testmod()

1708

sys.exit()

2794

1709

2795

1710

# Default values for config file for server-global settings

2796

1711

server_defaults = { "interface": "",

2798

1713

"port": "",

2799

1714

"debug": "False",

2800

1715

"priority":

2801

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

2802

":+SIGN-DSA-SHA256",

1716

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

2803

1717

"servicename": "Mandos",

2804

1718

"use_dbus": "True",

2805

1719

"use_ipv6": "True",

2806

1720

"debuglevel": "",

2807

"restore": "True",

2808

"socket": "",

2809

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

2810

"foreground": "False",

2811

"zeroconf": "True",

2812

}

1721

}

2813

1722

2814

1723

# Parse config file for server-global settings

2815

1724

server_config = configparser.SafeConfigParser(server_defaults)

2816

1725

del server_defaults

2817

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

1726

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

1727

"mandos.conf"))

2818

1728

# Convert the SafeConfigParser object to a dict

2819

1729

server_settings = server_config.defaults()

2820

1730

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

2821

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

1731

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

2822

1732

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

2823

1733

option)

2824

1734

if server_settings["port"]:

2825

1735

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

2826

1736

"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

1737

del server_config

2837

1738

2838

1739

# Override the settings from the config file with command line

2839

1740

# options, if set.

2840

1741

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

2841

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

2842

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

2843

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

1742

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

1743

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

2844

1744

value = getattr(options, option)

2845

1745

if value is not None:

2846

1746

server_settings[option] = value

2847

1747

del options

2848

1748

# Force all strings to be unicode

2849

1749

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

1750

if type(server_settings[option]) is str:

1751

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

2860

1752

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

2861

1753

2862

1754

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

2863

1755

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

1756

# For convenience

2870

1757

debug = server_settings["debug"]

2871

1758

debuglevel = server_settings["debuglevel"]

2872

1759

use_dbus = server_settings["use_dbus"]

2873

1760

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

1761

2888

1762

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

2889

syslogger.setFormatter(

2890

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

2891

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

2892

server_settings["servicename"])))

1763

syslogger.setFormatter(logging.Formatter

1764

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

1765

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

1766

% server_settings["servicename"]))

2893

1767

2894

1768

# Parse config file with clients

2895

client_config = configparser.SafeConfigParser(Client

2896

.client_defaults)

1769

client_defaults = { "timeout": "1h",

1770

"interval": "5m",

1771

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

1772

"host": "",

1773

"approval_delay": "0s",

1774

"approval_duration": "1s",

1775

}

1776

client_config = configparser.SafeConfigParser(client_defaults)

2897

1777

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

2898

1778

"clients.conf"))

2899

1779

2900

1780

global mandos_dbus_service

2901

1781

mandos_dbus_service = None

2902

1782

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

1783

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

1784

server_settings["port"]),

1785

ClientHandler,

1786

interface=(server_settings["interface"]

1787

or None),

1788

use_ipv6=use_ipv6,

1789

gnutls_priority=

1790

server_settings["priority"],

1791

use_dbus=use_dbus)

1792

if not debug:

1793

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

2919

1794

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)

1795

pidfile = open(pidfilename, "w")

1796

except IOError:

1797

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

2924

1798

2925

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

1799

try:

1800

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

1801

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

1802

except KeyError:

2926

1803

try:

2927

uid = pwd.getpwnam(name).pw_uid

2928

gid = pwd.getpwnam(name).pw_gid

2929

break

1804

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

1805

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

2930

1806

except KeyError:

2931

continue

2932

else:

2933

uid = 65534

2934

gid = 65534

1807

try:

1808

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

1809

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

1810

except KeyError:

1811

uid = 65534

1812

gid = 65534

2935

1813

try:

2936

1814

os.setgid(gid)

2937

1815

os.setuid(uid)

2938

except OSError as error:

2939

if error.errno != errno.EPERM:

2940

raise

1816

except OSError, error:

1817

if error[0] != errno.EPERM:

1818

raise error

2941

1819

1820

if not debug and not debuglevel:

1821

syslogger.setLevel(logging.WARNING)

1822

console.setLevel(logging.WARNING)

1823

if debuglevel:

1824

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

1825

syslogger.setLevel(level)

1826

console.setLevel(level)

1827

2942

1828

if debug:

2943

1829

# Enable all possible GnuTLS debugging

2944

1830

2945

1831

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

2946

1832

# - GnuTLS manual

2947

gnutls.global_set_log_level(11)

1833

gnutls.library.functions.gnutls_global_set_log_level(11)

2948

1834

2949

@gnutls.log_func

1835

@gnutls.library.types.gnutls_log_func

2950

1836

def debug_gnutls(level, string):

2951

1837

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

2952

1838

2953

gnutls.global_set_log_function(debug_gnutls)

1839

(gnutls.library.functions

1840

.gnutls_global_set_log_function(debug_gnutls))

2954

1841

2955

1842

# Redirect stdin so all checkers get /dev/null

2956

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

1843

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

2957

1844

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

2958

1845

if null > 2:

2959

1846

os.close(null)

1847

else:

1848

# No console logging

1849

logger.removeHandler(console)

2960

1850

2961

1851

# Need to fork before connecting to D-Bus

2962

if not foreground:

1852

if not debug:

2963

1853

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

2964

1854

daemon()

2965

1855

2966

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

2967

# need to inform gobject that threads will be used.

2968

gobject.threads_init()

2969

2970

1856

global main_loop

2971

1857

# From the Avahi example code

2972

DBusGMainLoop(set_as_default=True)

1858

DBusGMainLoop(set_as_default=True )

2973

1859

main_loop = gobject.MainLoop()

2974

1860

bus = dbus.SystemBus()

2975

1861

# End of Avahi example code

2976

1862

if use_dbus:

2977

1863

try:

2978

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

2979

bus,

2980

do_not_queue=True)

2981

old_bus_name = dbus.service.BusName(

2982

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

2983

do_not_queue=True)

2984

except dbus.exceptions.DBusException as e:

2985

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

1864

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

1865

bus, do_not_queue=True)

1866

except dbus.exceptions.NameExistsException, e:

1867

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

2986

1868

use_dbus = False

2987

1869

server_settings["use_dbus"] = False

2988

1870

tcp_server.use_dbus = False

2989

if zeroconf:

2990

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2991

service = AvahiServiceToSyslog(

2992

name = server_settings["servicename"],

2993

servicetype = "_mandos._tcp",

2994

protocol = protocol,

2995

bus = bus)

2996

if server_settings["interface"]:

2997

service.interface = if_nametoindex(

2998

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

1871

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1872

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

1873

servicetype = "_mandos._tcp",

1874

protocol = protocol, bus = bus)

1875

if server_settings["interface"]:

1876

service.interface = (if_nametoindex

1877

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

2999

1878

3000

1879

global multiprocessing_manager

3001

1880

multiprocessing_manager = multiprocessing.Manager()

3003

1882

client_class = Client

3004

1883

if use_dbus:

3005

1884

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

3006

3007

client_settings = Client.config_parser(client_config)

3008

old_client_settings = {}

3009

clients_data = {}

3010

3011

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

3012

global wnull

3013

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

3014

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

3015

# mode

3016

if debug or not foreground:

3017

wnull.close()

3018

3019

# Get client data and settings from last running state.

3020

if server_settings["restore"]:

3021

try:

3022

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

3023

clients_data, old_client_settings = pickle.load(

3024

stored_state)

3025

os.remove(stored_state_path)

3026

except IOError as e:

3027

if e.errno == errno.ENOENT:

3028

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

3029

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

3030

else:

3031

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

3032

exc_info=e)

3033

raise

3034

except EOFError as e:

3035

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

3036

"EOFError:",

3037

exc_info=e)

3038

3039

with PGPEngine() as pgp:

3040

for client_name, client in clients_data.items():

3041

# Skip removed clients

3042

if client_name not in client_settings:

3043

continue

3044

3045

# Decide which value to use after restoring saved state.

3046

# We have three different values: Old config file,

3047

# new config file, and saved state.

3048

# New config value takes precedence if it differs from old

3049

# config value, otherwise use saved state.

3050

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

3051

try:

3052

# For each value in new config, check if it

3053

# differs from the old config value (Except for

3054

# the "secret" attribute)

3055

if (name != "secret"

3056

and (value !=

3057

old_client_settings[client_name][name])):

3058

client[name] = value

3059

except KeyError:

3060

pass

3061

3062

# Clients who has passed its expire date can still be

3063

# enabled if its last checker was successful. A Client

3064

# whose checker succeeded before we stored its state is

3065

# assumed to have successfully run all checkers during

3066

# downtime.

3067

if client["enabled"]:

3068

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

3069

if not client["last_checked_ok"]:

3070

logger.warning(

3071

"disabling client {} - Client never "

3072

"performed a successful checker".format(

3073

client_name))

3074

client["enabled"] = False

3075

elif client["last_checker_status"] != 0:

3076

logger.warning(

3077

"disabling client {} - Client last"

3078

" checker failed with error code"

3079

" {}".format(

3080

client_name,

3081

client["last_checker_status"]))

3082

client["enabled"] = False

3083

else:

3084

client["expires"] = (

3085

datetime.datetime.utcnow()

3086

+ client["timeout"])

3087

logger.debug("Last checker succeeded,"

3088

" keeping {} enabled".format(

3089

client_name))

1885

def client_config_items(config, section):

1886

special_settings = {

1887

"approved_by_default":

1888

lambda: config.getboolean(section,

1889

"approved_by_default"),

1890

}

1891

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

3090

1892

try:

3091

client["secret"] = pgp.decrypt(

3092

client["encrypted_secret"],

3093

client_settings[client_name]["secret"])

3094

except PGPError:

3095

# If decryption fails, we use secret from new settings

3096

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

3097

client_name))

3098

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

3099

["secret"])

3100

3101

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

3102

for client_name in (set(old_client_settings)

3103

- set(client_settings)):

3104

del clients_data[client_name]

3105

for client_name in (set(client_settings)

3106

- set(old_client_settings)):

3107

clients_data[client_name] = client_settings[client_name]

3108

3109

# Create all client objects

3110

for client_name, client in clients_data.items():

3111

tcp_server.clients[client_name] = client_class(

3112

name = client_name,

3113

settings = client,

3114

server_settings = server_settings)

3115

1893

yield (name, special_settings[name]())

1894

except KeyError:

1895

yield (name, value)

1896

1897

tcp_server.clients.update(set(

1898

client_class(name = section,

1899

config= dict(client_config_items(

1900

client_config, section)))

1901

for section in client_config.sections()))

3116

1902

if not tcp_server.clients:

3117

1903

logger.warning("No clients defined")

3118

3119

if not foreground:

3120

if pidfile is not None:

3121

pid = os.getpid()

3122

try:

3123

with pidfile:

3124

print(pid, file=pidfile)

3125

except IOError:

3126

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

3127

pidfilename, pid)

3128

del pidfile

1904

1905

if not debug:

1906

try:

1907

with pidfile:

1908

pid = os.getpid()

1909

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

1910

del pidfile

1911

except IOError:

1912

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

1913

pidfilename, pid)

1914

except NameError:

1915

# "pidfile" was never created

1916

pass

3129

1917

del pidfilename

3130

1918

1919

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

1920

3131

1921

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

3132

1922

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

3133

1923

3134

1924

if use_dbus:

3135

3136

@alternate_dbus_interfaces(

3137

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

3138

class MandosDBusService(DBusObjectWithObjectManager):

1925

class MandosDBusService(dbus.service.Object):

3139

1926

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

3140

3141

1927

def __init__(self):

3142

1928

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

3143

3144

_interface = "se.recompile.Mandos"

1929

_interface = "se.bsnet.fukt.Mandos"

3145

1930

3146

1931

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

3147

1932

def ClientAdded(self, objpath):

3153

1938

"D-Bus signal"

3154

1939

pass

3155

1940

3156

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

3157

"true"})

3158

1941

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

3159

1942

def ClientRemoved(self, objpath, name):

3160

1943

"D-Bus signal"

3161

1944

pass

3162

1945

3163

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

3164

"true"})

3165

1946

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

3166

1947

def GetAllClients(self):

3167

1948

"D-Bus method"

3168

return dbus.Array(c.dbus_object_path for c in

3169

tcp_server.clients.itervalues())

1949

return dbus.Array(c.dbus_object_path

1950

for c in tcp_server.clients)

3170

1951

3171

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

3172

"true"})

3173

1952

@dbus.service.method(_interface,

3174

1953

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

3175

1954

def GetAllClientsWithProperties(self):

3176

1955

"D-Bus method"

3177

1956

return dbus.Dictionary(

3178

{ c.dbus_object_path: c.GetAll(

3179

"se.recompile.Mandos.Client")

3180

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

1957

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

1958

for c in tcp_server.clients),

3181

1959

signature="oa{sv}")

3182

1960

3183

1961

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

3184

1962

def RemoveClient(self, object_path):

3185

1963

"D-Bus method"

3186

for c in tcp_server.clients.itervalues():

1964

for c in tcp_server.clients:

3187

1965

if c.dbus_object_path == object_path:

3188

del tcp_server.clients[c.name]

1966

tcp_server.clients.remove(c)

3189

1967

c.remove_from_connection()

3190

# Don't signal the disabling

1968

# Don't signal anything except ClientRemoved

3191

1969

c.disable(quiet=True)

3192

# Emit D-Bus signal for removal

3193

self.client_removed_signal(c)

1970

# Emit D-Bus signal

1971

self.ClientRemoved(object_path, c.name)

3194

1972

return

3195

1973

raise KeyError(object_path)

3196

1974

3197

1975

del _interface

3198

3199

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3200

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

3201

def GetManagedObjects(self):

3202

"""D-Bus method"""

3203

return dbus.Dictionary(

3204

{ client.dbus_object_path:

3205

dbus.Dictionary(

3206

{ interface: client.GetAll(interface)

3207

for interface in

3208

client._get_all_interface_names()})

3209

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

3210

3211

def client_added_signal(self, client):

3212

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

3213

if use_dbus:

3214

# New standard signal

3215

self.InterfacesAdded(

3216

client.dbus_object_path,

3217

dbus.Dictionary(

3218

{ interface: client.GetAll(interface)

3219

for interface in

3220

client._get_all_interface_names()}))

3221

# Old signal

3222

self.ClientAdded(client.dbus_object_path)

3223

3224

def client_removed_signal(self, client):

3225

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

3226

if use_dbus:

3227

# New standard signal

3228

self.InterfacesRemoved(

3229

client.dbus_object_path,

3230

client._get_all_interface_names())

3231

# Old signal

3232

self.ClientRemoved(client.dbus_object_path,

3233

client.name)

3234

1976

3235

1977

mandos_dbus_service = MandosDBusService()

3236

1978

3237

1979

def cleanup():

3238

1980

"Cleanup function; run on exit"

3239

if zeroconf:

3240

service.cleanup()

3241

3242

multiprocessing.active_children()

3243

wnull.close()

3244

if not (tcp_server.clients or client_settings):

3245

return

3246

3247

# Store client before exiting. Secrets are encrypted with key

3248

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

3249

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

3250

clients = {}

3251

with PGPEngine() as pgp:

3252

for client in tcp_server.clients.itervalues():

3253

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

3254

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

3255

key)

3256

client_dict = {}

3257

3258

# A list of attributes that can not be pickled

3259

# + secret.

3260

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

3261

"checker", "server_settings" }

3262

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

3263

.Object):

3264

exclude.add(name)

3265

3266

client_dict["encrypted_secret"] = (client

3267

.encrypted_secret)

3268

for attr in client.client_structure:

3269

if attr not in exclude:

3270

client_dict[attr] = getattr(client, attr)

3271

3272

clients[client.name] = client_dict

3273

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

3274

3275

try:

3276

with tempfile.NamedTemporaryFile(

3277

mode='wb',

3278

suffix=".pickle",

3279

prefix='clients-',

3280

dir=os.path.dirname(stored_state_path),

3281

delete=False) as stored_state:

3282

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

3283

tempname = stored_state.name

3284

os.rename(tempname, stored_state_path)

3285

except (IOError, OSError) as e:

3286

if not debug:

3287

try:

3288

os.remove(tempname)

3289

except NameError:

3290

pass

3291

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

3292

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

3293

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

3294

else:

3295

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

3296

exc_info=e)

3297

raise

3298

3299

# Delete all clients, and settings from config

1981

service.cleanup()

1982

3300

1983

while tcp_server.clients:

3301

name, client = tcp_server.clients.popitem()

1984

client = tcp_server.clients.pop()

3302

1985

if use_dbus:

3303

1986

client.remove_from_connection()

3304

# Don't signal the disabling

1987

client.disable_hook = None

1988

# Don't signal anything except ClientRemoved

3305

1989

client.disable(quiet=True)

3306

# Emit D-Bus signal for removal

3307

1990

if use_dbus:

3308

mandos_dbus_service.client_removed_signal(client)

3309

client_settings.clear()

1991

# Emit D-Bus signal

1992

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

1993

client.name)

3310

1994

3311

1995

atexit.register(cleanup)

3312

1996

3313

for client in tcp_server.clients.itervalues():

1997

for client in tcp_server.clients:

3314

1998

if use_dbus:

3315

# Emit D-Bus signal for adding

3316

mandos_dbus_service.client_added_signal(client)

3317

# Need to initiate checking of clients

3318

if client.enabled:

3319

client.init_checker()

1999

# Emit D-Bus signal

2000

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2001

client.enable()

3320

2002

3321

2003

tcp_server.enable()

3322

2004

tcp_server.server_activate()

3323

2005

3324

2006

# Find out what port we got

3325

if zeroconf:

3326

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

2007

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

3327

2008

if use_ipv6:

3328

2009

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

3329

" flowinfo %d, scope_id %d",

3330

*tcp_server.socket.getsockname())

2010

" flowinfo %d, scope_id %d"

2011

% tcp_server.socket.getsockname())

3331

2012

else: # IPv4

3332

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

3333

*tcp_server.socket.getsockname())

2013

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

2014

% tcp_server.socket.getsockname())

3334

2015

3335

2016

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

3336

2017

3337

2018

try:

3338

if zeroconf:

3339

# From the Avahi example code

3340

try:

3341

service.activate()

3342

except dbus.exceptions.DBusException as error:

3343

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

3344

cleanup()

3345

sys.exit(1)

3346

# End of Avahi example code

2019

# From the Avahi example code

2020

try:

2021

service.activate()

2022

except dbus.exceptions.DBusException, error:

2023

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

2024

cleanup()

2025

sys.exit(1)

2026

# End of Avahi example code

3347

2027

3348

2028

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

3349

2029

lambda *args, **kwargs:

3352

2032

3353

2033

logger.debug("Starting main loop")

3354

2034

main_loop.run()

3355

except AvahiError as error:

3356

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

2035

except AvahiError, error:

2036

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

3357

2037

cleanup()

3358

2038

sys.exit(1)

3359

2039

except KeyboardInterrupt:

3364

2044

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

3365

2045

cleanup()

3366

2046

3367

3368

2047

if __name__ == '__main__':

3369

2048

main()