/mandos/release : revision 237.7.370

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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try:

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from gi.repository import GObject

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except ImportError:

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import gobject as GObject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.3"

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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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class AvahiError(Exception):

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

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self.value = value

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server.GetAlternativeServiceName(self.name))

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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def remove(self):

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

179

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self .entry_group_state_changed))

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'StateChanged', self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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self.rename()

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370

elif state == avahi.ENTRY_GROUP_FAILURE:

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371

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

372

str(error))

373

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

374

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375

def cleanup(self):

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376

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

222

377

if self.group is not None:

223

378

try:

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379

self.group.Free()

225

380

except (dbus.exceptions.UnknownMethodException,

226

dbus.exceptions.DBusException) as e:

381

dbus.exceptions.DBusException):

227

382

pass

228

383

self.group = None

229

384

self.remove()

385

230

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

231

387

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

232

388

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

233

bad_states = { avahi.SERVER_INVALID:

234

"Zeroconf server invalid",

235

avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

238

avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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

}

240

395

if state in bad_states:

241

396

if bad_states[state] is not None:

242

397

if error is None:

245

400

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

246

401

self.cleanup()

247

402

elif state == avahi.SERVER_RUNNING:

248

self.add()

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)

249

415

else:

250

416

if error is None:

251

417

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

252

418

else:

253

419

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

420

254

421

def activate(self):

255

422

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

256

423

if self.server is None:

260

427

follow_name_owner_changes=True),

261

428

avahi.DBUS_INTERFACE_SERVER)

262

429

self.server.connect_to_signal("StateChanged",

263

self.server_state_changed)

430

self.server_state_changed)

264

431

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

265

432

266

433

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

267

708

class Client(object):

268

709

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

269

710

270

711

Attributes:

271

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

712

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

272

713

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

273

714

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

274

715

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

275

716

to see if the client lives.

276

717

'None' if no process is running.

277

checker_callback_tag: a gobject event source tag, or None

718

checker_callback_tag: a GObject event source tag, or None

278

719

checker_command: string; External command which is run to check

279

720

if client lives. %() expansions are done at

280

721

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

281

722

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

282

checker_initiator_tag: a gobject event source tag, or None

723

checker_initiator_tag: a GObject event source tag, or None

283

724

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

284

727

current_checker_command: string; current running checker_command

285

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

286

disable_initiator_tag: a gobject event source tag, or None

728

disable_initiator_tag: a GObject event source tag, or None

287

729

enabled: bool()

288

730

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

289

731

uniquely identify the client

291

733

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

292

734

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

293

735

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

294

last_enabled: datetime.datetime(); (UTC)

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

295

742

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

296

743

D-Bus identifiers

297

744

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

298

745

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

299

746

until this client is disabled

300

extended_timeout: extra long timeout when password has been sent

747

extended_timeout: extra long timeout when secret has been sent

301

748

runtime_expansions: Allowed attributes for runtime expansion.

302

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

749

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

303

750

disabled, or None

751

server_settings: The server_settings dict from main()

304

752

"""

305

753

306

754

runtime_expansions = ("approval_delay", "approval_duration",

307

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

308

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

755

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

756

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

757

"last_approval_request", "last_checked_ok",

309

758

"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

}

310

770

311

771

@staticmethod

312

def _timedelta_to_milliseconds(td):

313

"Convert a datetime.timedelta() to milliseconds"

314

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

315

+ (td.seconds * 1000)

316

+ (td.microseconds // 1000))

317

318

def timeout_milliseconds(self):

319

"Return the 'timeout' attribute in milliseconds"

320

return self._timedelta_to_milliseconds(self.timeout)

321

322

def extended_timeout_milliseconds(self):

323

"Return the 'extended_timeout' attribute in milliseconds"

324

return self._timedelta_to_milliseconds(self.extended_timeout)

325

326

def interval_milliseconds(self):

327

"Return the 'interval' attribute in milliseconds"

328

return self._timedelta_to_milliseconds(self.interval)

329

330

def approval_delay_milliseconds(self):

331

return self._timedelta_to_milliseconds(self.approval_delay)

332

333

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

334

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

335

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

336

attribute."""

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):

337

822

self.name = name

338

if config is None:

339

config = {}

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

340

840

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

341

# Uppercase and remove spaces from fingerprint for later

342

# comparison purposes with return value from the fingerprint()

343

# function

344

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

345

.replace(" ", ""))

346

841

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

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

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

356

% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

842

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

843

datetime.datetime.utcnow())

844

845

# attributes specific for this server instance

367

846

self.checker = None

368

847

self.checker_initiator_tag = None

369

848

self.disable_initiator_tag = None

370

self.expires = None

371

849

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

373

850

self.current_checker_command = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

851

self.approved = None

378

852

self.approvals_pending = 0

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

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

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)

384

864

865

# Send notice to process children that client state has changed

385

866

def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

867

with self.changedstate:

868

self.changedstate.notify_all()

869

390

870

def enable(self):

391

871

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

392

872

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

393

873

# Already enabled

394

874

return

395

self.send_changedstate()

875

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

876

self.enabled = True

396

877

self.last_enabled = datetime.datetime.utcnow()

397

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

398

# and every interval from then on.

399

self.checker_initiator_tag = (gobject.timeout_add

400

(self.interval_milliseconds(),

401

self.start_checker))

402

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

403

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

404

self.disable_initiator_tag = (gobject.timeout_add

405

(self.timeout_milliseconds(),

406

self.disable))

407

self.enabled = True

408

# Also start a new checker *right now*.

409

self.start_checker()

878

self.init_checker()

879

self.send_changedstate()

410

880

411

881

def disable(self, quiet=True):

412

882

"""Disable this client."""

413

883

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

414

884

return False

415

885

if not quiet:

416

self.send_changedstate()

417

if not quiet:

418

886

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

419

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

420

gobject.source_remove(self.disable_initiator_tag)

887

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

888

GObject.source_remove(self.disable_initiator_tag)

421

889

self.disable_initiator_tag = None

422

890

self.expires = None

423

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

424

gobject.source_remove(self.checker_initiator_tag)

891

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

892

GObject.source_remove(self.checker_initiator_tag)

425

893

self.checker_initiator_tag = None

426

894

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

895

self.enabled = False

430

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

896

if not quiet:

897

self.send_changedstate()

898

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

431

899

return False

432

900

433

901

def __del__(self):

434

self.disable_hook = None

435

902

self.disable()

436

903

437

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

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):

438

922

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

439

923

self.checker_callback_tag = None

440

924

self.checker = None

441

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

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:

444

933

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

445

934

vars(self))

446

935

self.checked_ok()

447

936

else:

448

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

449

vars(self))

937

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

450

938

else:

939

self.last_checker_status = -1

940

self.last_checker_signal = -returncode

451

941

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

452

942

vars(self))

453

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

943

return False

944

945

def checked_ok(self):

946

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

947

self.last_checked_ok = datetime.datetime.utcnow()

948

self.last_checker_status = 0

949

self.last_checker_signal = None

950

self.bump_timeout()

951

952

def bump_timeout(self, timeout=None):

953

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

460

954

if timeout is None:

461

955

timeout = self.timeout

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(self._timedelta_to_milliseconds(timeout),

467

self.disable))

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

468

963

469

964

def need_approval(self):

470

965

self.last_approval_request = datetime.datetime.utcnow()

475

970

If a checker already exists, leave it running and do

476

971

nothing."""

477

972

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

478

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

479

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

480

# client would inevitably timeout, since no checker would get

481

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

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

482

977

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

483

978

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

484

979

# should be.

485

980

486

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

487

try:

488

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

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

493

else:

494

if pid:

495

logger.warning("Checker was a zombie")

496

gobject.source_remove(self.checker_callback_tag)

497

self.checker_callback(pid, status,

498

self.current_checker_command)

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

499

985

# Start a new checker if needed

500

986

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 }

501

991

try:

502

# In case checker_command has exactly one % operator

503

command = self.checker_command % self.host

504

except TypeError:

505

# Escape attributes for the shell

506

escaped_attrs = dict(

507

(attr,

508

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

509

errors=

510

'replace')))

511

for attr in

512

self.runtime_expansions)

513

514

try:

515

command = self.checker_command % escaped_attrs

516

except TypeError as error:

517

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

518

' %s', self.checker_command, error)

519

return True # Try again later

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

520

998

self.current_checker_command = command

521

try:

522

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

523

command, self.name)

524

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

525

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

526

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

527

# always replaced by /dev/null.)

528

self.checker = subprocess.Popen(command,

529

close_fds=True,

530

shell=True, cwd="/")

531

self.checker_callback_tag = (gobject.child_watch_add

532

(self.checker.pid,

533

self.checker_callback,

534

data=command))

535

# The checker may have completed before the gobject

536

# watch was added. Check for this.

537

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

538

if pid:

539

gobject.source_remove(self.checker_callback_tag)

540

self.checker_callback(pid, status, command)

541

except OSError as error:

542

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

543

error)

544

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

999

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

1000

self.name)

1001

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

1002

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

1003

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

1004

# always replaced by /dev/null.)

1005

# The exception is when not debugging but nevertheless

1006

# running in the foreground; use the previously

1007

# created wnull.

1008

popen_args = { "close_fds": True,

1009

"shell": True,

1010

"cwd": "/" }

1011

if (not self.server_settings["debug"]

1012

and self.server_settings["foreground"]):

1013

popen_args.update({"stdout": wnull,

1014

"stderr": wnull })

1015

pipe = multiprocessing.Pipe(duplex = False)

1016

self.checker = multiprocessing.Process(

1017

target = call_pipe,

1018

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

1019

kwargs = popen_args)

1020

self.checker.start()

1021

self.checker_callback_tag = GObject.io_add_watch(

1022

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

1023

self.checker_callback, pipe[0], command)

1024

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

545

1025

return True

546

1026

547

1027

def stop_checker(self):

548

1028

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

549

1029

if self.checker_callback_tag:

550

gobject.source_remove(self.checker_callback_tag)

1030

GObject.source_remove(self.checker_callback_tag)

551

1031

self.checker_callback_tag = None

552

1032

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

553

1033

return

554

1034

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

555

try:

556

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

557

#time.sleep(0.5)

558

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

559

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

560

except OSError as error:

561

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

562

raise

1035

self.checker.terminate()

563

1036

self.checker = None

564

1037

565

def dbus_service_property(dbus_interface, signature="v",

566

access="readwrite", byte_arrays=False):

1038

1039

def dbus_service_property(dbus_interface,

1040

signature="v",

1041

access="readwrite",

1042

byte_arrays=False):

567

1043

"""Decorators for marking methods of a DBusObjectWithProperties to

568

1044

become properties on the D-Bus.

569

1045

578

1054

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

579

1055

if byte_arrays and signature != "ay":

580

1056

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

581

" signature %r" % signature)

1057

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

1058

582

1059

def decorator(func):

583

1060

func._dbus_is_property = True

584

1061

func._dbus_interface = dbus_interface

589

1066

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

590

1067

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

591

1068

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

592

1113

return decorator

593

1114

594

1115

595

1116

class DBusPropertyException(dbus.exceptions.DBusException):

596

1117

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

597

1118

"""

598

def __unicode__(self):

599

return unicode(str(self))

1119

pass

600

1120

601

1121

602

1122

class DBusPropertyAccessException(DBusPropertyException):

611

1131

pass

612

1132

613

1133

614

class DBusObjectWithProperties(dbus.service.Object):

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):

615

1224

"""A D-Bus object with properties.

616

1225

617

1226

Classes inheriting from this can use the dbus_service_property

618

1227

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

619

1228

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

620

1229

"""

621

1230

622

@staticmethod

623

def _is_dbus_property(obj):

624

return getattr(obj, "_dbus_is_property", False)

625

626

def _get_all_dbus_properties(self):

627

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

628

"""

629

return ((prop._dbus_name, prop)

630

for name, prop in

631

inspect.getmembers(self, self._is_dbus_property))

632

633

1231

def _get_dbus_property(self, interface_name, property_name):

634

1232

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

635

1233

property with the specified name and interface.

636

1234

"""

637

for name in (property_name,

638

property_name + "_dbus_property"):

639

prop = getattr(self, name, None)

640

if (prop is None

641

or not self._is_dbus_property(prop)

642

or prop._dbus_name != property_name

643

or (interface_name and prop._dbus_interface

644

and interface_name != prop._dbus_interface)):

645

continue

646

return prop

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

647

1242

# No such property

648

raise DBusPropertyNotFound(self.dbus_object_path + ":"

649

+ interface_name + "."

650

+ property_name)

651

652

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

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",

653

1257

out_signature="v")

654

1258

def Get(self, interface_name, property_name):

655

1259

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

673

1277

# The byte_arrays option is not supported yet on

674

1278

# signatures other than "ay".

675

1279

if prop._dbus_signature != "ay":

676

raise ValueError

677

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

678

for byte in value))

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))

679

1285

prop(value)

680

1286

681

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

1287

@dbus.service.method(dbus.PROPERTIES_IFACE,

1288

in_signature="s",

682

1289

out_signature="a{sv}")

683

1290

def GetAll(self, interface_name):

684

1291

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

685

1292

standard.

686

1293

687

1294

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

688

1295

"""

689

all = {}

690

for name, prop in self._get_all_dbus_properties():

1296

properties = {}

1297

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

691

1298

if (interface_name

692

1299

and interface_name != prop._dbus_interface):

693

1300

# Interface non-empty but did not match

697

1304

continue

698

1305

value = prop()

699

1306

if not hasattr(value, "variant_level"):

700

all[name] = value

1307

properties[name] = value

701

1308

continue

702

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

703

value.variant_level+1)

704

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

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

705

1320

706

1321

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

707

1322

out_signature="s",

708

1323

path_keyword='object_path',

709

1324

connection_keyword='connection')

710

1325

def Introspect(self, object_path, connection):

711

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

1326

"""Overloading of standard D-Bus method.

1327

1328

Inserts property tags and interface annotation tags.

712

1329

"""

713

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

714

connection)

1330

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1331

object_path,

1332

connection)

715

1333

try:

716

1334

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

1335

717

1336

def make_tag(document, name, prop):

718

1337

e = document.createElement("property")

719

1338

e.setAttribute("name", name)

720

1339

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

721

1340

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

722

1341

return e

1342

723

1343

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

1344

# Add property tags

724

1345

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

725

1346

for name, prop

726

in self._get_all_dbus_properties()

1347

in self._get_all_dbus_things("property")

727

1348

if prop._dbus_interface

728

1349

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

729

1350

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)

730

1367

# Add the names to the return values for the

731

1368

# "org.freedesktop.DBus.Properties" methods

732

1369

if (if_tag.getAttribute("name")

747

1384

except (AttributeError, xml.dom.DOMException,

748

1385

xml.parsers.expat.ExpatError) as error:

749

1386

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

750

error)

751

return xmlstring

752

753

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"})

754

1654

class ClientDBus(Client, DBusObjectWithProperties):

755

1655

"""A Client class using D-Bus

756

1656

760

1660

"""

761

1661

762

1662

runtime_expansions = (Client.runtime_expansions

763

+ ("dbus_object_path",))

1663

+ ("dbus_object_path", ))

1664

1665

_interface = "se.recompile.Mandos.Client"

764

1666

765

1667

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

766

1668

767

1669

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

768

self._approvals_pending = 0

769

1670

self.bus = bus

770

1671

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

771

1672

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

772

1673

# the D-Bus

773

client_object_name = unicode(self.name).translate(

1674

client_object_name = str(self.name).translate(

774

1675

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

775

1676

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

776

self.dbus_object_path = (dbus.ObjectPath

777

("/clients/" + client_object_name))

1677

self.dbus_object_path = dbus.ObjectPath(

1678

"/clients/" + client_object_name)

778

1679

DBusObjectWithProperties.__init__(self, self.bus,

779

1680

self.dbus_object_path)

780

def _set_expires(self, value):

781

old_value = getattr(self, "_expires", None)

782

self._expires = value

783

if hasattr(self, "dbus_object_path") and old_value != value:

784

dbus_time = (self._datetime_to_dbus(self._expires,

785

variant_level=1))

786

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

787

dbus_time)

788

expires = property(lambda self: self._expires, _set_expires)

789

del _set_expires

790

791

def _get_approvals_pending(self):

792

return self._approvals_pending

793

def _set_approvals_pending(self, value):

794

old_value = self._approvals_pending

795

self._approvals_pending = value

796

bval = bool(value)

797

if (hasattr(self, "dbus_object_path")

798

and bval is not bool(old_value)):

799

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

800

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

801

dbus_bool)

802

803

approvals_pending = property(_get_approvals_pending,

804

_set_approvals_pending)

805

del _get_approvals_pending, _set_approvals_pending

806

807

@staticmethod

808

def _datetime_to_dbus(dt, variant_level=0):

809

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

810

if dt is None:

811

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

812

return dbus.String(dt.isoformat(),

813

variant_level=variant_level)

814

815

def enable(self):

816

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

817

r = Client.enable(self)

818

if oldstate != self.enabled:

819

# Emit D-Bus signals

820

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

821

dbus.Boolean(True, variant_level=1))

822

self.PropertyChanged(

823

dbus.String("LastEnabled"),

824

self._datetime_to_dbus(self.last_enabled,

825

variant_level=1))

826

return r

827

828

def disable(self, quiet = False):

829

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

830

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

831

if not quiet and oldstate != self.enabled:

832

# Emit D-Bus signal

833

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

834

dbus.Boolean(False, variant_level=1))

835

return r

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

836

1762

837

1763

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

838

1764

try:

843

1769

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

844

1770

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

845

1771

846

def checker_callback(self, pid, condition, command,

847

*args, **kwargs):

848

self.checker_callback_tag = None

849

self.checker = None

850

# Emit D-Bus signal

851

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

852

dbus.Boolean(False, variant_level=1))

853

if os.WIFEXITED(condition):

854

exitstatus = os.WEXITSTATUS(condition)

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:

855

1779

# Emit D-Bus signal

856

1780

self.CheckerCompleted(dbus.Int16(exitstatus),

857

dbus.Int64(condition),

1781

# This is specific to GNU libC

1782

dbus.Int64(exitstatus << 8),

858

1783

dbus.String(command))

859

1784

else:

860

1785

# Emit D-Bus signal

861

1786

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

862

dbus.Int64(condition),

1787

dbus.Int64(

1788

# This is specific to GNU libC

1789

(exitstatus << 8)

1790

| self.last_checker_signal),

863

1791

dbus.String(command))

864

865

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

866

*args, **kwargs)

867

868

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

869

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

870

# Emit D-Bus signal

871

self.PropertyChanged(

872

dbus.String("LastCheckedOK"),

873

(self._datetime_to_dbus(self.last_checked_ok,

874

variant_level=1)))

875

876

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

877

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

878

# Emit D-Bus signal

879

self.PropertyChanged(

880

dbus.String("LastApprovalRequest"),

881

(self._datetime_to_dbus(self.last_approval_request,

882

variant_level=1)))

883

return r

1792

return ret

884

1793

885

1794

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

886

old_checker = self.checker

887

if self.checker is not None:

888

old_checker_pid = self.checker.pid

889

else:

890

old_checker_pid = None

1795

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

891

1796

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

892

1797

# Only if new checker process was started

893

1798

if (self.checker is not None

894

1799

and old_checker_pid != self.checker.pid):

895

1800

# Emit D-Bus signal

896

1801

self.CheckerStarted(self.current_checker_command)

897

self.PropertyChanged(

898

dbus.String("CheckerRunning"),

899

dbus.Boolean(True, variant_level=1))

900

1802

return r

901

1803

902

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

903

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

904

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

905

if (old_checker is not None

906

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

907

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

908

dbus.Boolean(False, variant_level=1))

909

return r

910

911

1804

def _reset_approved(self):

912

self._approved = None

1805

self.approved = None

913

1806

return False

914

1807

915

1808

def approve(self, value=True):

1809

self.approved = value

1810

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

1811

* 1000), self._reset_approved)

916

1812

self.send_changedstate()

917

self._approved = value

918

gobject.timeout_add(self._timedelta_to_milliseconds

919

(self.approval_duration),

920

self._reset_approved)

921

922

1813

923

1814

## D-Bus methods, signals & properties

924

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

1815

1816

## Interfaces

925

1817

926

1818

## Signals

927

1819

938

1830

pass

939

1831

940

1832

# PropertyChanged - signal

1833

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

941

1834

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

942

1835

def PropertyChanged(self, property, value):

943

1836

"D-Bus signal"

977

1870

self.checked_ok()

978

1871

979

1872

# Enable - method

1873

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

980

1874

@dbus.service.method(_interface)

981

1875

def Enable(self):

982

1876

"D-Bus method"

983

1877

self.enable()

984

1878

985

1879

# StartChecker - method

1880

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

986

1881

@dbus.service.method(_interface)

987

1882

def StartChecker(self):

988

1883

"D-Bus method"

989

1884

self.start_checker()

990

1885

991

1886

# Disable - method

1887

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

992

1888

@dbus.service.method(_interface)

993

1889

def Disable(self):

994

1890

"D-Bus method"

995

1891

self.disable()

996

1892

997

1893

# StopChecker - method

1894

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

998

1895

@dbus.service.method(_interface)

999

1896

def StopChecker(self):

1000

1897

self.stop_checker()

1007

1904

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

1008

1905

1009

1906

# ApprovedByDefault - property

1010

@dbus_service_property(_interface, signature="b",

1907

@dbus_service_property(_interface,

1908

signature="b",

1011

1909

access="readwrite")

1012

1910

def ApprovedByDefault_dbus_property(self, value=None):

1013

1911

if value is None: # get

1014

1912

return dbus.Boolean(self.approved_by_default)

1015

old_value = self.approved_by_default

1016

1913

self.approved_by_default = bool(value)

1017

# Emit D-Bus signal

1018

if old_value != self.approved_by_default:

1019

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

1020

dbus.Boolean(value, variant_level=1))

1021

1914

1022

1915

# ApprovalDelay - property

1023

@dbus_service_property(_interface, signature="t",

1916

@dbus_service_property(_interface,

1917

signature="t",

1024

1918

access="readwrite")

1025

1919

def ApprovalDelay_dbus_property(self, value=None):

1026

1920

if value is None: # get

1027

return dbus.UInt64(self.approval_delay_milliseconds())

1028

old_value = self.approval_delay

1921

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

1922

* 1000)

1029

1923

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

1030

# Emit D-Bus signal

1031

if old_value != self.approval_delay:

1032

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

1033

dbus.UInt64(value, variant_level=1))

1034

1924

1035

1925

# ApprovalDuration - property

1036

@dbus_service_property(_interface, signature="t",

1926

@dbus_service_property(_interface,

1927

signature="t",

1037

1928

access="readwrite")

1038

1929

def ApprovalDuration_dbus_property(self, value=None):

1039

1930

if value is None: # get

1040

return dbus.UInt64(self._timedelta_to_milliseconds(

1041

self.approval_duration))

1042

old_value = self.approval_duration

1931

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

1932

* 1000)

1043

1933

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

1044

# Emit D-Bus signal

1045

if old_value != self.approval_duration:

1046

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

1047

dbus.UInt64(value, variant_level=1))

1048

1934

1049

1935

# Name - property

1936

@dbus_annotations(

1937

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

1050

1938

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

1051

1939

def Name_dbus_property(self):

1052

1940

return dbus.String(self.name)

1053

1941

1054

1942

# Fingerprint - property

1943

@dbus_annotations(

1944

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

1055

1945

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

1056

1946

def Fingerprint_dbus_property(self):

1057

1947

return dbus.String(self.fingerprint)

1058

1948

1059

1949

# Host - property

1060

@dbus_service_property(_interface, signature="s",

1950

@dbus_service_property(_interface,

1951

signature="s",

1061

1952

access="readwrite")

1062

1953

def Host_dbus_property(self, value=None):

1063

1954

if value is None: # get

1064

1955

return dbus.String(self.host)

1065

old_value = self.host

1066

self.host = value

1067

# Emit D-Bus signal

1068

if old_value != self.host:

1069

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

1070

dbus.String(value, variant_level=1))

1956

self.host = str(value)

1071

1957

1072

1958

# Created - property

1959

@dbus_annotations(

1960

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

1073

1961

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

1074

1962

def Created_dbus_property(self):

1075

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

1963

return datetime_to_dbus(self.created)

1076

1964

1077

1965

# LastEnabled - property

1078

1966

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

1079

1967

def LastEnabled_dbus_property(self):

1080

return self._datetime_to_dbus(self.last_enabled)

1968

return datetime_to_dbus(self.last_enabled)

1081

1969

1082

1970

# Enabled - property

1083

@dbus_service_property(_interface, signature="b",

1971

@dbus_service_property(_interface,

1972

signature="b",

1084

1973

access="readwrite")

1085

1974

def Enabled_dbus_property(self, value=None):

1086

1975

if value is None: # get

1091

1980

self.disable()

1092

1981

1093

1982

# LastCheckedOK - property

1094

@dbus_service_property(_interface, signature="s",

1983

@dbus_service_property(_interface,

1984

signature="s",

1095

1985

access="readwrite")

1096

1986

def LastCheckedOK_dbus_property(self, value=None):

1097

1987

if value is not None:

1098

1988

self.checked_ok()

1099

1989

return

1100

return self._datetime_to_dbus(self.last_checked_ok)

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)

1101

1996

1102

1997

# Expires - property

1103

1998

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

1104

1999

def Expires_dbus_property(self):

1105

return self._datetime_to_dbus(self.expires)

2000

return datetime_to_dbus(self.expires)

1106

2001

1107

2002

# LastApprovalRequest - property

1108

2003

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

1109

2004

def LastApprovalRequest_dbus_property(self):

1110

return self._datetime_to_dbus(self.last_approval_request)

2005

return datetime_to_dbus(self.last_approval_request)

1111

2006

1112

2007

# Timeout - property

1113

@dbus_service_property(_interface, signature="t",

2008

@dbus_service_property(_interface,

2009

signature="t",

1114

2010

access="readwrite")

1115

2011

def Timeout_dbus_property(self, value=None):

1116

2012

if value is None: # get

1117

return dbus.UInt64(self.timeout_milliseconds())

1118

old_value = self.timeout

2013

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

2014

old_timeout = self.timeout

1119

2015

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

1120

# Emit D-Bus signal

1121

if old_value != self.timeout:

1122

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

1123

dbus.UInt64(value, variant_level=1))

1124

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

1125

return

1126

# Reschedule timeout

1127

gobject.source_remove(self.disable_initiator_tag)

1128

self.disable_initiator_tag = None

1129

self.expires = None

1130

time_to_die = (self.

1131

_timedelta_to_milliseconds((self

1132

.last_checked_ok

1133

+ self.timeout)

1134

- datetime.datetime

1135

.utcnow()))

1136

if time_to_die <= 0:

1137

# The timeout has passed

1138

self.disable()

1139

else:

1140

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

1141

+ datetime.timedelta(milliseconds = time_to_die))

1142

self.disable_initiator_tag = (gobject.timeout_add

1143

(time_to_die, self.disable))

1144

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

1145

2032

# ExtendedTimeout - property

1146

@dbus_service_property(_interface, signature="t",

2033

@dbus_service_property(_interface,

2034

signature="t",

1147

2035

access="readwrite")

1148

2036

def ExtendedTimeout_dbus_property(self, value=None):

1149

2037

if value is None: # get

1150

return dbus.UInt64(self.extended_timeout_milliseconds())

1151

old_value = self.extended_timeout

2038

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

2039

* 1000)

1152

2040

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

1153

# Emit D-Bus signal

1154

if old_value != self.extended_timeout:

1155

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

1156

dbus.UInt64(value, variant_level=1))

1157

2041

1158

2042

# Interval - property

1159

@dbus_service_property(_interface, signature="t",

2043

@dbus_service_property(_interface,

2044

signature="t",

1160

2045

access="readwrite")

1161

2046

def Interval_dbus_property(self, value=None):

1162

2047

if value is None: # get

1163

return dbus.UInt64(self.interval_milliseconds())

1164

old_value = self.interval

2048

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

1165

2049

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

1166

# Emit D-Bus signal

1167

if old_value != self.interval:

1168

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

1169

dbus.UInt64(value, variant_level=1))

1170

2050

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

1171

2051

return

1172

# Reschedule checker run

1173

gobject.source_remove(self.checker_initiator_tag)

1174

self.checker_initiator_tag = (gobject.timeout_add

1175

(value, self.start_checker))

1176

self.start_checker() # Start one now, too

1177

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

1178

2059

# Checker - property

1179

@dbus_service_property(_interface, signature="s",

2060

@dbus_service_property(_interface,

2061

signature="s",

1180

2062

access="readwrite")

1181

2063

def Checker_dbus_property(self, value=None):

1182

2064

if value is None: # get

1183

2065

return dbus.String(self.checker_command)

1184

old_value = self.checker_command

1185

self.checker_command = value

1186

# Emit D-Bus signal

1187

if old_value != self.checker_command:

1188

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

1189

dbus.String(self.checker_command,

1190

variant_level=1))

2066

self.checker_command = str(value)

1191

2067

1192

2068

# CheckerRunning - property

1193

@dbus_service_property(_interface, signature="b",

2069

@dbus_service_property(_interface,

2070

signature="b",

1194

2071

access="readwrite")

1195

2072

def CheckerRunning_dbus_property(self, value=None):

1196

2073

if value is None: # get

1201

2078

self.stop_checker()

1202

2079

1203

2080

# ObjectPath - property

2081

@dbus_annotations(

2082

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

2083

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

1204

2084

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

1205

2085

def ObjectPath_dbus_property(self):

1206

2086

return self.dbus_object_path # is already a dbus.ObjectPath

1207

2087

1208

2088

# Secret = property

1209

@dbus_service_property(_interface, signature="ay",

1210

access="write", byte_arrays=True)

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)

1211

2096

def Secret_dbus_property(self, value):

1212

self.secret = str(value)

2097

self.secret = bytes(value)

1213

2098

1214

2099

del _interface

1215

2100

1219

2104

self._pipe = child_pipe

1220

2105

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

1221

2106

if not self._pipe.recv():

1222

raise KeyError()

1223

2107

raise KeyError(fpr)

2108

1224

2109

def __getattribute__(self, name):

1225

if(name == '_pipe'):

2110

if name == '_pipe':

1226

2111

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

1227

2112

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

1228

2113

data = self._pipe.recv()

1229

2114

if data[0] == 'data':

1230

2115

return data[1]

1231

2116

if data[0] == 'function':

2117

1232

2118

def func(*args, **kwargs):

1233

2119

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

1234

2120

return self._pipe.recv()[1]

2121

1235

2122

return func

1236

2123

1237

2124

def __setattr__(self, name, value):

1238

if(name == '_pipe'):

2125

if name == '_pipe':

1239

2126

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

1240

2127

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

1241

2128

1249

2136

def handle(self):

1250

2137

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

1251

2138

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

1252

unicode(self.client_address))

2139

str(self.client_address))

1253

2140

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

1254

2141

self.server.child_pipe.fileno())

1255

1256

session = (gnutls.connection

1257

.ClientSession(self.request,

1258

gnutls.connection

1259

.X509Credentials()))

1260

1261

# Note: gnutls.connection.X509Credentials is really a

1262

# generic GnuTLS certificate credentials object so long as

1263

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

1264

# here despite using OpenPGP certificates.

1265

2142

2143

session = gnutls.ClientSession(self.request)

2144

1266

2145

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

1267

2146

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

1268

2147

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

1271

2150

priority = self.server.gnutls_priority

1272

2151

if priority is None:

1273

2152

priority = "NORMAL"

1274

(gnutls.library.functions

1275

.gnutls_priority_set_direct(session._c_object,

1276

priority, None))

1277

2153

gnutls.priority_set_direct(session._c_object, priority,

2154

None)

2155

1278

2156

# Start communication using the Mandos protocol

1279

2157

# Get protocol number

1280

2158

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

1281

2159

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

1282

2160

try:

1283

2161

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

1284

raise RuntimeError

2162

raise RuntimeError(line)

1285

2163

except (ValueError, IndexError, RuntimeError) as error:

1286

2164

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

1287

2165

return

1288

2166

1289

2167

# Start GnuTLS connection

1290

2168

try:

1291

2169

session.handshake()

1292

except gnutls.errors.GNUTLSError as error:

2170

except gnutls.Error as error:

1293

2171

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

1294

2172

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

1295

2173

# established. Just abandon the request.

1296

2174

return

1297

2175

logger.debug("Handshake succeeded")

1298

2176

1299

2177

approval_required = False

1300

2178

try:

1301

2179

try:

1302

fpr = self.fingerprint(self.peer_certificate

1303

(session))

1304

except (TypeError,

1305

gnutls.errors.GNUTLSError) as error:

2180

fpr = self.fingerprint(

2181

self.peer_certificate(session))

2182

except (TypeError, gnutls.Error) as error:

1306

2183

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

1307

2184

return

1308

2185

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

1309

2186

1310

2187

try:

1311

2188

client = ProxyClient(child_pipe, fpr,

1312

2189

self.client_address)

1321

2198

while True:

1322

2199

if not client.enabled:

1323

2200

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

1324

client.name)

2201

client.name)

1325

2202

if self.server.use_dbus:

1326

2203

# Emit D-Bus signal

1327

client.Rejected("Disabled")

2204

client.Rejected("Disabled")

1328

2205

return

1329

2206

1330

if client._approved or not client.approval_delay:

2207

if client.approved or not client.approval_delay:

1331

2208

#We are approved or approval is disabled

1332

2209

break

1333

elif client._approved is None:

2210

elif client.approved is None:

1334

2211

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

1335

2212

client.name)

1336

2213

if self.server.use_dbus:

1337

2214

# Emit D-Bus signal

1338

2215

client.NeedApproval(

1339

client.approval_delay_milliseconds(),

1340

client.approved_by_default)

2216

client.approval_delay.total_seconds()

2217

* 1000, client.approved_by_default)

1341

2218

else:

1342

2219

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

1343

2220

client.name)

1347

2224

return

1348

2225

1349

2226

#wait until timeout or approved

1350

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

1351

2227

time = datetime.datetime.now()

1352

2228

client.changedstate.acquire()

1353

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

2229

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

1354

2230

client.changedstate.release()

1355

2231

time2 = datetime.datetime.now()

1356

2232

if (time2 - time) >= delay:

1367

2243

else:

1368

2244

delay -= time2 - time

1369

2245

1370

sent_size = 0

1371

while sent_size < len(client.secret):

1372

try:

1373

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

1374

except gnutls.errors.GNUTLSError as error:

1375

logger.warning("gnutls send failed")

1376

return

1377

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

1378

sent, len(client.secret)

1379

- (sent_size + sent))

1380

sent_size += sent

1381

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

1382

2253

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

1383

# bump the timeout as if seen

1384

client.checked_ok(client.extended_timeout)

2254

# bump the timeout using extended_timeout

2255

client.bump_timeout(client.extended_timeout)

1385

2256

if self.server.use_dbus:

1386

2257

# Emit D-Bus signal

1387

2258

client.GotSecret()

1391

2262

client.approvals_pending -= 1

1392

2263

try:

1393

2264

session.bye()

1394

except gnutls.errors.GNUTLSError as error:

1395

logger.warning("GnuTLS bye failed")

2265

except gnutls.Error as error:

2266

logger.warning("GnuTLS bye failed",

2267

exc_info=error)

1396

2268

1397

2269

@staticmethod

1398

2270

def peer_certificate(session):

1399

2271

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

1400

2272

# If not an OpenPGP certificate...

1401

if (gnutls.library.functions

1402

.gnutls_certificate_type_get(session._c_object)

1403

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1404

# ...do the normal thing

1405

return session.peer_certificate

2273

if (gnutls.certificate_type_get(session._c_object)

2274

!= gnutls.CRT_OPENPGP):

2275

# ...return invalid data

2276

return b""

1406

2277

list_size = ctypes.c_uint(1)

1407

cert_list = (gnutls.library.functions

1408

.gnutls_certificate_get_peers

2278

cert_list = (gnutls.certificate_get_peers

1409

2279

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

1410

2280

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

1411

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

1412

" certificate")

2281

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

1413

2282

if list_size.value == 0:

1414

2283

return None

1415

2284

cert = cert_list[0]

1419

2288

def fingerprint(openpgp):

1420

2289

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1421

2290

# New GnuTLS "datum" with the OpenPGP public key

1422

datum = (gnutls.library.types

1423

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

1424

ctypes.POINTER

1425

(ctypes.c_ubyte)),

1426

ctypes.c_uint(len(openpgp))))

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)))

1427

2295

# New empty GnuTLS certificate

1428

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1429

(gnutls.library.functions

1430

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2296

crt = gnutls.openpgp_crt_t()

2297

gnutls.openpgp_crt_init(ctypes.byref(crt))

1431

2298

# Import the OpenPGP public key into the certificate

1432

(gnutls.library.functions

1433

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

1434

gnutls.library.constants

1435

.GNUTLS_OPENPGP_FMT_RAW))

2299

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

2300

gnutls.OPENPGP_FMT_RAW)

1436

2301

# Verify the self signature in the key

1437

2302

crtverify = ctypes.c_uint()

1438

(gnutls.library.functions

1439

.gnutls_openpgp_crt_verify_self(crt, 0,

1440

ctypes.byref(crtverify)))

2303

gnutls.openpgp_crt_verify_self(crt, 0,

2304

ctypes.byref(crtverify))

1441

2305

if crtverify.value != 0:

1442

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1443

raise (gnutls.errors.CertificateSecurityError

1444

("Verify failed"))

2306

gnutls.openpgp_crt_deinit(crt)

2307

raise gnutls.CertificateSecurityError("Verify failed")

1445

2308

# New buffer for the fingerprint

1446

2309

buf = ctypes.create_string_buffer(20)

1447

2310

buf_len = ctypes.c_size_t()

1448

2311

# Get the fingerprint from the certificate into the buffer

1449

(gnutls.library.functions

1450

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

1451

ctypes.byref(buf_len)))

2312

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

2313

ctypes.byref(buf_len))

1452

2314

# Deinit the certificate

1453

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2315

gnutls.openpgp_crt_deinit(crt)

1454

2316

# Convert the buffer to a Python bytestring

1455

2317

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

1456

2318

# Convert the bytestring to hexadecimal notation

1457

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

2319

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

1458

2320

return hex_fpr

1459

2321

1460

2322

1461

2323

class MultiprocessingMixIn(object):

1462

2324

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

2325

1463

2326

def sub_process_main(self, request, address):

1464

2327

try:

1465

2328

self.finish_request(request, address)

1466

except:

2329

except Exception:

1467

2330

self.handle_error(request, address)

1468

2331

self.close_request(request)

1469

2332

1470

2333

def process_request(self, request, address):

1471

2334

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

1472

multiprocessing.Process(target = self.sub_process_main,

1473

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

2335

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

2336

args = (request, address))

2337

proc.start()

2338

return proc

2339

1474

2340

1475

2341

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1476

2342

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

2343

1477

2344

def process_request(self, request, client_address):

1478

2345

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

1479

2346

1480

2347

This function creates a new pipe in self.pipe

1481

2348

"""

1482

2349

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1483

1484

super(MultiprocessingMixInWithPipe,

1485

self).process_request(request, client_address)

2350

2351

proc = MultiprocessingMixIn.process_request(self, request,

2352

client_address)

1486

2353

self.child_pipe.close()

1487

self.add_pipe(parent_pipe)

1488

1489

def add_pipe(self, parent_pipe):

2354

self.add_pipe(parent_pipe, proc)

2355

2356

def add_pipe(self, parent_pipe, proc):

1490

2357

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

1491

raise NotImplementedError

2358

raise NotImplementedError()

2359

1492

2360

1493

2361

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1494

2362

socketserver.TCPServer, object):

1499

2367

interface: None or a network interface name (string)

1500

2368

use_ipv6: Boolean; to use IPv6 or not

1501

2369

"""

2370

1502

2371

def __init__(self, server_address, RequestHandlerClass,

1503

interface=None, use_ipv6=True):

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

"""

1504

2378

self.interface = interface

1505

2379

if use_ipv6:

1506

2380

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.

1507

2407

socketserver.TCPServer.__init__(self, server_address,

1508

2408

RequestHandlerClass)

2409

1509

2410

def server_bind(self):

1510

2411

"""This overrides the normal server_bind() function

1511

2412

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

1517

2418

self.interface)

1518

2419

else:

1519

2420

try:

1520

self.socket.setsockopt(socket.SOL_SOCKET,

1521

SO_BINDTODEVICE,

1522

str(self.interface

1523

+ '\0'))

2421

self.socket.setsockopt(

2422

socket.SOL_SOCKET, SO_BINDTODEVICE,

2423

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

1524

2424

except socket.error as error:

1525

if error[0] == errno.EPERM:

1526

logger.error("No permission to"

1527

" bind to interface %s",

1528

self.interface)

1529

elif error[0] == errno.ENOPROTOOPT:

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:

1530

2429

logger.error("SO_BINDTODEVICE not available;"

1531

2430

" cannot bind to interface %s",

1532

2431

self.interface)

2432

elif error.errno == errno.ENODEV:

2433

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

2434

" cannot bind", self.interface)

1533

2435

else:

1534

2436

raise

1535

2437

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

1538

2440

if self.address_family == socket.AF_INET6:

1539

2441

any_address = "::" # in6addr_any

1540

2442

else:

1541

any_address = socket.INADDR_ANY

2443

any_address = "0.0.0.0" # INADDR_ANY

1542

2444

self.server_address = (any_address,

1543

2445

self.server_address[1])

1544

2446

elif not self.server_address[1]:

1545

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

1546

0)

2447

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

1547

2448

# if self.interface:

1548

2449

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

1549

2450

# 0, # port

1561

2462

gnutls_priority GnuTLS priority string

1562

2463

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

1563

2464

1564

Assumes a gobject.MainLoop event loop.

2465

Assumes a GObject.MainLoop event loop.

1565

2466

"""

2467

1566

2468

def __init__(self, server_address, RequestHandlerClass,

1567

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

1568

gnutls_priority=None, use_dbus=True):

2469

interface=None,

2470

use_ipv6=True,

2471

clients=None,

2472

gnutls_priority=None,

2473

use_dbus=True,

2474

socketfd=None):

1569

2475

self.enabled = False

1570

2476

self.clients = clients

1571

2477

if self.clients is None:

1572

self.clients = set()

2478

self.clients = {}

1573

2479

self.use_dbus = use_dbus

1574

2480

self.gnutls_priority = gnutls_priority

1575

2481

IPv6_TCPServer.__init__(self, server_address,

1576

2482

RequestHandlerClass,

1577

2483

interface = interface,

1578

use_ipv6 = use_ipv6)

2484

use_ipv6 = use_ipv6,

2485

socketfd = socketfd)

2486

1579

2487

def server_activate(self):

1580

2488

if self.enabled:

1581

2489

return socketserver.TCPServer.server_activate(self)

2490

1582

2491

def enable(self):

1583

2492

self.enabled = True

1584

def add_pipe(self, parent_pipe):

2493

2494

def add_pipe(self, parent_pipe, proc):

1585

2495

# Call "handle_ipc" for both data and EOF events

1586

gobject.io_add_watch(parent_pipe.fileno(),

1587

gobject.IO_IN | gobject.IO_HUP,

1588

functools.partial(self.handle_ipc,

1589

parent_pipe = parent_pipe))

1590

1591

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

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,

1592

2506

client_object=None):

1593

condition_names = {

1594

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

1595

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

1596

# blocking).

1597

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

1598

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

1599

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

1600

# broken, usually for pipes and

1601

# sockets).

1602

}

1603

conditions_string = ' | '.join(name

1604

for cond, name in

1605

condition_names.iteritems()

1606

if cond & condition)

1607

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

1608

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

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()

1609

2511

return False

1610

2512

1611

2513

# Read a request from the child

1616

2518

fpr = request[1]

1617

2519

address = request[2]

1618

2520

1619

for c in self.clients:

2521

for c in self.clients.itervalues():

1620

2522

if c.fingerprint == fpr:

1621

2523

client = c

1622

2524

break

1625

2527

"dress: %s", fpr, address)

1626

2528

if self.use_dbus:

1627

2529

# Emit D-Bus signal

1628

mandos_dbus_service.ClientNotFound(fpr, address[0])

2530

mandos_dbus_service.ClientNotFound(fpr,

2531

address[0])

1629

2532

parent_pipe.send(False)

1630

2533

return False

1631

2534

1632

gobject.io_add_watch(parent_pipe.fileno(),

1633

gobject.IO_IN | gobject.IO_HUP,

1634

functools.partial(self.handle_ipc,

1635

parent_pipe = parent_pipe,

1636

client_object = client))

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))

1637

2542

parent_pipe.send(True)

1638

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

2543

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

2544

# same fileno

1639

2545

return False

1640

2546

if command == 'funcall':

1641

2547

funcname = request[1]

1642

2548

args = request[2]

1643

2549

kwargs = request[3]

1644

2550

1645

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

1646

2551

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

2552

funcname)(*args,

2553

**kwargs)))

2554

1647

2555

if command == 'getattr':

1648

2556

attrname = request[1]

1649

if callable(client_object.__getattribute__(attrname)):

1650

parent_pipe.send(('function',))

2557

if isinstance(client_object.__getattribute__(attrname),

2558

collections.Callable):

2559

parent_pipe.send(('function', ))

1651

2560

else:

1652

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

2561

parent_pipe.send((

2562

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

1653

2563

1654

2564

if command == 'setattr':

1655

2565

attrname = request[1]

1656

2566

value = request[2]

1657

2567

setattr(client_object, attrname, value)

1658

2568

1659

2569

return True

1660

2570

1661

2571

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

1662

2668

def string_to_delta(interval):

1663

2669

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

1664

2670

1675

2681

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

1676

2682

datetime.timedelta(0, 330)

1677

2683

"""

2684

2685

try:

2686

return rfc3339_duration_to_delta(interval)

2687

except ValueError:

2688

pass

2689

1678

2690

timevalue = datetime.timedelta(0)

1679

2691

for s in interval.split():

1680

2692

try:

1681

suffix = unicode(s[-1])

2693

suffix = s[-1]

1682

2694

value = int(s[:-1])

1683

2695

if suffix == "d":

1684

2696

delta = datetime.timedelta(value)

1691

2703

elif suffix == "w":

1692

2704

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

1693

2705

else:

1694

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

1695

except (ValueError, IndexError) as e:

2706

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

2707

except IndexError as e:

1696

2708

raise ValueError(*(e.args))

1697

2709

timevalue += delta

1698

2710

return timevalue

1699

2711

1700

2712

1701

def if_nametoindex(interface):

1702

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

1703

1704

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

1705

global if_nametoindex

1706

try:

1707

if_nametoindex = (ctypes.cdll.LoadLibrary

1708

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

1709

.if_nametoindex)

1710

except (OSError, AttributeError):

1711

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

1712

def if_nametoindex(interface):

1713

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

1714

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

1715

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

1716

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1717

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

1718

interface))

1719

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

1720

ifreq[16:20])[0]

1721

return interface_index

1722

return if_nametoindex(interface)

1723

1724

1725

2713

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

1726

2714

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

1727

2715

1735

2723

sys.exit()

1736

2724

if not noclose:

1737

2725

# Close all standard open file descriptors

1738

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

2726

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

1739

2727

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

1740

2728

raise OSError(errno.ENODEV,

1741

"%s not a character device"

1742

% os.path.devnull)

2729

"{} not a character device"

2730

.format(os.devnull))

1743

2731

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

1744

2732

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

1745

2733

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

1754

2742

1755

2743

parser = argparse.ArgumentParser()

1756

2744

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

1757

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

2745

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

1758

2746

help="show version number and exit")

1759

2747

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

1760

2748

help="Bind to interface IF")

1766

2754

help="Run self-test")

1767

2755

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

1768

2756

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

1769

" to terminal")

2757

" to terminal", default=None)

1770

2758

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

1771

2759

help="Debug level for stdout output")

1772

2760

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

1779

2767

" files")

1780

2768

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

1781

2769

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

1782

" system bus interface")

2770

" system bus interface", default=None)

1783

2771

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

1784

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

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

1785

2788

options = parser.parse_args()

1786

2789

1787

2790

if options.check:

1788

2791

import doctest

1789

doctest.testmod()

1790

sys.exit()

2792

fail_count, test_count = doctest.testmod()

2793

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

1791

2794

1792

2795

# Default values for config file for server-global settings

1793

2796

server_defaults = { "interface": "",

1795

2798

"port": "",

1796

2799

"debug": "False",

1797

2800

"priority":

1798

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

2801

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

2802

":+SIGN-DSA-SHA256",

1799

2803

"servicename": "Mandos",

1800

2804

"use_dbus": "True",

1801

2805

"use_ipv6": "True",

1802

2806

"debuglevel": "",

1803

}

2807

"restore": "True",

2808

"socket": "",

2809

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

2810

"foreground": "False",

2811

"zeroconf": "True",

2812

}

1804

2813

1805

2814

# Parse config file for server-global settings

1806

2815

server_config = configparser.SafeConfigParser(server_defaults)

1807

2816

del server_defaults

1808

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

1809

"mandos.conf"))

2817

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

1810

2818

# Convert the SafeConfigParser object to a dict

1811

2819

server_settings = server_config.defaults()

1812

2820

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

1813

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

2821

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

1814

2822

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

1815

2823

option)

1816

2824

if server_settings["port"]:

1817

2825

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

1818

2826

"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"])

1819

2836

del server_config

1820

2837

1821

2838

# Override the settings from the config file with command line

1822

2839

# options, if set.

1823

2840

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

1824

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

1825

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

2841

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

2842

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

2843

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

1826

2844

value = getattr(options, option)

1827

2845

if value is not None:

1828

2846

server_settings[option] = value

1829

2847

del options

1830

2848

# Force all strings to be unicode

1831

2849

for option in server_settings.keys():

1832

if type(server_settings[option]) is str:

1833

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

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

1834

2860

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

1835

2861

1836

2862

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

1837

2863

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

1838

2869

# For convenience

1839

2870

debug = server_settings["debug"]

1840

2871

debuglevel = server_settings["debuglevel"]

1841

2872

use_dbus = server_settings["use_dbus"]

1842

2873

use_ipv6 = server_settings["use_ipv6"]

1843

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

1844

2888

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

1845

syslogger.setFormatter(logging.Formatter

1846

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

1847

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

1848

% server_settings["servicename"]))

2889

syslogger.setFormatter(

2890

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

2891

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

2892

server_settings["servicename"])))

1849

2893

1850

2894

# Parse config file with clients

1851

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

1852

"extended_timeout": "15m",

1853

"interval": "2m",

1854

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

1855

"host": "",

1856

"approval_delay": "0s",

1857

"approval_duration": "1s",

1858

}

1859

client_config = configparser.SafeConfigParser(client_defaults)

2895

client_config = configparser.SafeConfigParser(Client

2896

.client_defaults)

1860

2897

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

1861

2898

"clients.conf"))

1862

2899

1863

2900

global mandos_dbus_service

1864

2901

mandos_dbus_service = None

1865

2902

1866

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

1867

server_settings["port"]),

1868

ClientHandler,

1869

interface=(server_settings["interface"]

1870

or None),

1871

use_ipv6=use_ipv6,

1872

gnutls_priority=

1873

server_settings["priority"],

1874

use_dbus=use_dbus)

1875

if not debug:

1876

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

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

1877

2919

try:

1878

pidfile = open(pidfilename, "w")

1879

except IOError:

1880

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

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)

1881

2924

1882

try:

1883

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

1884

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

1885

except KeyError:

2925

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

2926

("mandos", "mandos"),

2927

("nobody", "nogroup")):

1886

2928

try:

1887

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

1888

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

2929

uid = pwd.getpwnam(name).pw_uid

2930

gid = pwd.getpwnam(group).pw_gid

2931

break

1889

2932

except KeyError:

1890

try:

1891

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

1892

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

1893

except KeyError:

1894

uid = 65534

1895

gid = 65534

2933

continue

2934

else:

2935

uid = 65534

2936

gid = 65534

1896

2937

try:

1897

2938

os.setgid(gid)

1898

2939

os.setuid(uid)

1899

2940

except OSError as error:

1900

if error[0] != errno.EPERM:

1901

raise error

2941

if error.errno != errno.EPERM:

2942

raise

1902

2943

1903

if not debug and not debuglevel:

1904

syslogger.setLevel(logging.WARNING)

1905

console.setLevel(logging.WARNING)

1906

if debuglevel:

1907

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

1908

syslogger.setLevel(level)

1909

console.setLevel(level)

1910

1911

2944

if debug:

1912

2945

# Enable all possible GnuTLS debugging

1913

2946

1914

2947

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

1915

2948

# - GnuTLS manual

1916

gnutls.library.functions.gnutls_global_set_log_level(11)

2949

gnutls.global_set_log_level(11)

1917

2950

1918

@gnutls.library.types.gnutls_log_func

2951

@gnutls.log_func

1919

2952

def debug_gnutls(level, string):

1920

2953

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

1921

2954

1922

(gnutls.library.functions

1923

.gnutls_global_set_log_function(debug_gnutls))

2955

gnutls.global_set_log_function(debug_gnutls)

1924

2956

1925

2957

# Redirect stdin so all checkers get /dev/null

1926

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

2958

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

1927

2959

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

1928

2960

if null > 2:

1929

2961

os.close(null)

1930

else:

1931

# No console logging

1932

logger.removeHandler(console)

1933

2962

1934

2963

# Need to fork before connecting to D-Bus

1935

if not debug:

2964

if not foreground:

1936

2965

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

1937

2966

daemon()

1938

2967

2968

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

2969

# need to inform GObject that threads will be used.

2970

GObject.threads_init()

2971

1939

2972

global main_loop

1940

2973

# From the Avahi example code

1941

DBusGMainLoop(set_as_default=True )

1942

main_loop = gobject.MainLoop()

2974

DBusGMainLoop(set_as_default=True)

2975

main_loop = GObject.MainLoop()

1943

2976

bus = dbus.SystemBus()

1944

2977

# End of Avahi example code

1945

2978

if use_dbus:

1946

2979

try:

1947

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

1948

bus, do_not_queue=True)

1949

except dbus.exceptions.NameExistsException as e:

1950

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

2980

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

2981

bus,

2982

do_not_queue=True)

2983

old_bus_name = dbus.service.BusName(

2984

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

2985

do_not_queue=True)

2986

except dbus.exceptions.DBusException as e:

2987

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

1951

2988

use_dbus = False

1952

2989

server_settings["use_dbus"] = False

1953

2990

tcp_server.use_dbus = False

1954

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1955

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

1956

servicetype = "_mandos._tcp",

1957

protocol = protocol, bus = bus)

1958

if server_settings["interface"]:

1959

service.interface = (if_nametoindex

1960

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

2991

if zeroconf:

2992

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2993

service = AvahiServiceToSyslog(

2994

name = server_settings["servicename"],

2995

servicetype = "_mandos._tcp",

2996

protocol = protocol,

2997

bus = bus)

2998

if server_settings["interface"]:

2999

service.interface = if_nametoindex(

3000

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

1961

3001

1962

3002

global multiprocessing_manager

1963

3003

multiprocessing_manager = multiprocessing.Manager()

1965

3005

client_class = Client

1966

3006

if use_dbus:

1967

3007

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

1968

def client_config_items(config, section):

1969

special_settings = {

1970

"approved_by_default":

1971

lambda: config.getboolean(section,

1972

"approved_by_default"),

1973

}

1974

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

3008

3009

client_settings = Client.config_parser(client_config)

3010

old_client_settings = {}

3011

clients_data = {}

3012

3013

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

3014

global wnull

3015

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

3016

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

3017

# mode

3018

if debug or not foreground:

3019

wnull.close()

3020

3021

# Get client data and settings from last running state.

3022

if server_settings["restore"]:

3023

try:

3024

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

3025

clients_data, old_client_settings = pickle.load(

3026

stored_state)

3027

os.remove(stored_state_path)

3028

except IOError as e:

3029

if e.errno == errno.ENOENT:

3030

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

3031

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

3032

else:

3033

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

3034

exc_info=e)

3035

raise

3036

except EOFError as e:

3037

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

3038

"EOFError:",

3039

exc_info=e)

3040

3041

with PGPEngine() as pgp:

3042

for client_name, client in clients_data.items():

3043

# Skip removed clients

3044

if client_name not in client_settings:

3045

continue

3046

3047

# Decide which value to use after restoring saved state.

3048

# We have three different values: Old config file,

3049

# new config file, and saved state.

3050

# New config value takes precedence if it differs from old

3051

# config value, otherwise use saved state.

3052

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

3053

try:

3054

# For each value in new config, check if it

3055

# differs from the old config value (Except for

3056

# the "secret" attribute)

3057

if (name != "secret"

3058

and (value !=

3059

old_client_settings[client_name][name])):

3060

client[name] = value

3061

except KeyError:

3062

pass

3063

3064

# Clients who has passed its expire date can still be

3065

# enabled if its last checker was successful. A Client

3066

# whose checker succeeded before we stored its state is

3067

# assumed to have successfully run all checkers during

3068

# downtime.

3069

if client["enabled"]:

3070

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

3071

if not client["last_checked_ok"]:

3072

logger.warning(

3073

"disabling client {} - Client never "

3074

"performed a successful checker".format(

3075

client_name))

3076

client["enabled"] = False

3077

elif client["last_checker_status"] != 0:

3078

logger.warning(

3079

"disabling client {} - Client last"

3080

" checker failed with error code"

3081

" {}".format(

3082

client_name,

3083

client["last_checker_status"]))

3084

client["enabled"] = False

3085

else:

3086

client["expires"] = (

3087

datetime.datetime.utcnow()

3088

+ client["timeout"])

3089

logger.debug("Last checker succeeded,"

3090

" keeping {} enabled".format(

3091

client_name))

1975

3092

try:

1976

yield (name, special_settings[name]())

1977

except KeyError:

1978

yield (name, value)

1979

1980

tcp_server.clients.update(set(

1981

client_class(name = section,

1982

config= dict(client_config_items(

1983

client_config, section)))

1984

for section in client_config.sections()))

3093

client["secret"] = pgp.decrypt(

3094

client["encrypted_secret"],

3095

client_settings[client_name]["secret"])

3096

except PGPError:

3097

# If decryption fails, we use secret from new settings

3098

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

3099

client_name))

3100

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

3101

["secret"])

3102

3103

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

3104

for client_name in (set(old_client_settings)

3105

- set(client_settings)):

3106

del clients_data[client_name]

3107

for client_name in (set(client_settings)

3108

- set(old_client_settings)):

3109

clients_data[client_name] = client_settings[client_name]

3110

3111

# Create all client objects

3112

for client_name, client in clients_data.items():

3113

tcp_server.clients[client_name] = client_class(

3114

name = client_name,

3115

settings = client,

3116

server_settings = server_settings)

3117

1985

3118

if not tcp_server.clients:

1986

3119

logger.warning("No clients defined")

1987

1988

if not debug:

1989

try:

1990

with pidfile:

1991

pid = os.getpid()

1992

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

1993

del pidfile

1994

except IOError:

1995

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

1996

pidfilename, pid)

1997

except NameError:

1998

# "pidfile" was never created

1999

pass

3120

3121

if not foreground:

3122

if pidfile is not None:

3123

pid = os.getpid()

3124

try:

3125

with pidfile:

3126

print(pid, file=pidfile)

3127

except IOError:

3128

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

3129

pidfilename, pid)

3130

del pidfile

2000

3131

del pidfilename

2001

2002

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

2003

3132

2004

3133

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

2005

3134

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

2006

3135

2007

3136

if use_dbus:

2008

class MandosDBusService(dbus.service.Object):

3137

3138

@alternate_dbus_interfaces(

3139

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

3140

class MandosDBusService(DBusObjectWithObjectManager):

2009

3141

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

3142

2010

3143

def __init__(self):

2011

3144

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

2012

_interface = "se.bsnet.fukt.Mandos"

3145

3146

_interface = "se.recompile.Mandos"

2013

3147

2014

3148

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

2015

3149

def ClientAdded(self, objpath):

2021

3155

"D-Bus signal"

2022

3156

pass

2023

3157

3158

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

3159

"true"})

2024

3160

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

2025

3161

def ClientRemoved(self, objpath, name):

2026

3162

"D-Bus signal"

2027

3163

pass

2028

3164

3165

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

3166

"true"})

2029

3167

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

2030

3168

def GetAllClients(self):

2031

3169

"D-Bus method"

2032

return dbus.Array(c.dbus_object_path

2033

for c in tcp_server.clients)

3170

return dbus.Array(c.dbus_object_path for c in

3171

tcp_server.clients.itervalues())

2034

3172

3173

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

3174

"true"})

2035

3175

@dbus.service.method(_interface,

2036

3176

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

2037

3177

def GetAllClientsWithProperties(self):

2038

3178

"D-Bus method"

2039

3179

return dbus.Dictionary(

2040

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

2041

for c in tcp_server.clients),

3180

{ c.dbus_object_path: c.GetAll(

3181

"se.recompile.Mandos.Client")

3182

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

2042

3183

signature="oa{sv}")

2043

3184

2044

3185

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

2045

3186

def RemoveClient(self, object_path):

2046

3187

"D-Bus method"

2047

for c in tcp_server.clients:

3188

for c in tcp_server.clients.itervalues():

2048

3189

if c.dbus_object_path == object_path:

2049

tcp_server.clients.remove(c)

3190

del tcp_server.clients[c.name]

2050

3191

c.remove_from_connection()

2051

# Don't signal anything except ClientRemoved

3192

# Don't signal the disabling

2052

3193

c.disable(quiet=True)

2053

# Emit D-Bus signal

2054

self.ClientRemoved(object_path, c.name)

3194

# Emit D-Bus signal for removal

3195

self.client_removed_signal(c)

2055

3196

return

2056

3197

raise KeyError(object_path)

2057

3198

2058

3199

del _interface

3200

3201

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3202

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

3203

def GetManagedObjects(self):

3204

"""D-Bus method"""

3205

return dbus.Dictionary(

3206

{ client.dbus_object_path:

3207

dbus.Dictionary(

3208

{ interface: client.GetAll(interface)

3209

for interface in

3210

client._get_all_interface_names()})

3211

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

3212

3213

def client_added_signal(self, client):

3214

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

3215

if use_dbus:

3216

# New standard signal

3217

self.InterfacesAdded(

3218

client.dbus_object_path,

3219

dbus.Dictionary(

3220

{ interface: client.GetAll(interface)

3221

for interface in

3222

client._get_all_interface_names()}))

3223

# Old signal

3224

self.ClientAdded(client.dbus_object_path)

3225

3226

def client_removed_signal(self, client):

3227

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

3228

if use_dbus:

3229

# New standard signal

3230

self.InterfacesRemoved(

3231

client.dbus_object_path,

3232

client._get_all_interface_names())

3233

# Old signal

3234

self.ClientRemoved(client.dbus_object_path,

3235

client.name)

2059

3236

2060

3237

mandos_dbus_service = MandosDBusService()

2061

3238

2062

3239

def cleanup():

2063

3240

"Cleanup function; run on exit"

2064

service.cleanup()

2065

3241

if zeroconf:

3242

service.cleanup()

3243

3244

multiprocessing.active_children()

3245

wnull.close()

3246

if not (tcp_server.clients or client_settings):

3247

return

3248

3249

# Store client before exiting. Secrets are encrypted with key

3250

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

3251

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

3252

clients = {}

3253

with PGPEngine() as pgp:

3254

for client in tcp_server.clients.itervalues():

3255

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

3256

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

3257

key)

3258

client_dict = {}

3259

3260

# A list of attributes that can not be pickled

3261

# + secret.

3262

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

3263

"checker", "server_settings" }

3264

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

3265

.Object):

3266

exclude.add(name)

3267

3268

client_dict["encrypted_secret"] = (client

3269

.encrypted_secret)

3270

for attr in client.client_structure:

3271

if attr not in exclude:

3272

client_dict[attr] = getattr(client, attr)

3273

3274

clients[client.name] = client_dict

3275

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

3276

3277

try:

3278

with tempfile.NamedTemporaryFile(

3279

mode='wb',

3280

suffix=".pickle",

3281

prefix='clients-',

3282

dir=os.path.dirname(stored_state_path),

3283

delete=False) as stored_state:

3284

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

3285

tempname = stored_state.name

3286

os.rename(tempname, stored_state_path)

3287

except (IOError, OSError) as e:

3288

if not debug:

3289

try:

3290

os.remove(tempname)

3291

except NameError:

3292

pass

3293

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

3294

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

3295

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

3296

else:

3297

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

3298

exc_info=e)

3299

raise

3300

3301

# Delete all clients, and settings from config

2066

3302

while tcp_server.clients:

2067

client = tcp_server.clients.pop()

3303

name, client = tcp_server.clients.popitem()

2068

3304

if use_dbus:

2069

3305

client.remove_from_connection()

2070

client.disable_hook = None

2071

# Don't signal anything except ClientRemoved

3306

# Don't signal the disabling

2072

3307

client.disable(quiet=True)

3308

# Emit D-Bus signal for removal

2073

3309

if use_dbus:

2074

# Emit D-Bus signal

2075

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2076

client.name)

3310

mandos_dbus_service.client_removed_signal(client)

3311

client_settings.clear()

2077

3312

2078

3313

atexit.register(cleanup)

2079

3314

2080

for client in tcp_server.clients:

3315

for client in tcp_server.clients.itervalues():

2081

3316

if use_dbus:

2082

# Emit D-Bus signal

2083

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2084

client.enable()

3317

# Emit D-Bus signal for adding

3318

mandos_dbus_service.client_added_signal(client)

3319

# Need to initiate checking of clients

3320

if client.enabled:

3321

client.init_checker()

2085

3322

2086

3323

tcp_server.enable()

2087

3324

tcp_server.server_activate()

2088

3325

2089

3326

# Find out what port we got

2090

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

3327

if zeroconf:

3328

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

2091

3329

if use_ipv6:

2092

3330

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

2093

" flowinfo %d, scope_id %d"

2094

% tcp_server.socket.getsockname())

3331

" flowinfo %d, scope_id %d",

3332

*tcp_server.socket.getsockname())

2095

3333

else: # IPv4

2096

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

2097

% tcp_server.socket.getsockname())

3334

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

3335

*tcp_server.socket.getsockname())

2098

3336

2099

3337

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

2100

3338

2101

3339

try:

2102

# From the Avahi example code

2103

try:

2104

service.activate()

2105

except dbus.exceptions.DBusException as error:

2106

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

2107

cleanup()

2108

sys.exit(1)

2109

# End of Avahi example code

3340

if zeroconf:

3341

# From the Avahi example code

3342

try:

3343

service.activate()

3344

except dbus.exceptions.DBusException as error:

3345

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

3346

cleanup()

3347

sys.exit(1)

3348

# End of Avahi example code

2110

3349

2111

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

3350

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

2112

3351

lambda *args, **kwargs:

2113

3352

(tcp_server.handle_request

2114

3353

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

2116

3355

logger.debug("Starting main loop")

2117

3356

main_loop.run()

2118

3357

except AvahiError as error:

2119

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

3358

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

2120

3359

cleanup()

2121

3360

sys.exit(1)

2122

3361

except KeyboardInterrupt:

2127

3366

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

2128

3367

cleanup()

2129

3368

3369

2130

3370

if __name__ == '__main__':

2131

3371

main()