/mandos/release : revision 237.16.4

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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try:

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from future_builtins import *

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except ImportError:

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pass

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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try:

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from gi.repository import GObject

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except ImportError:

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import gobject as GObject

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.5"

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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 copy_function(func):

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"""Make a copy of a function"""

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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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(b":")

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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)

243

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)

257

return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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It is instantiated once, and simulates having an Avahi module."""

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IF_UNSPEC = -1 # avahi-common/address.h

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PROTO_UNSPEC = -1 # avahi-common/address.h

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))

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for s in t), signature="ay")

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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version = "1.4.1"

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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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104

class AvahiError(Exception):

285

105

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

286

106

self.value = value

287

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

288

**kwargs)

289

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

108

def __unicode__(self):

109

return unicode(repr(self.value))

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291

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class AvahiServiceError(AvahiError):

292

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pass

293

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class AvahiGroupError(AvahiError):

296

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pass

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304

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Used to optionally bind to the specified interface.

305

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name: string; Example: 'Mandos'

306

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

307

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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137

"""

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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):

138

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):

331

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self.interface = interface

332

143

self.name = name

333

144

self.type = servicetype

342

153

self.server = None

343

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self.bus = bus

344

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self.entry_group_state_changed_match = None

345

346

def rename(self, remove=True):

156

def rename(self):

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

348

158

if self.rename_count >= self.max_renames:

349

159

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

350

160

" after %i retries, exiting.",

351

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self.rename_count)

352

162

raise AvahiServiceError("Too many renames")

353

self.name = str(

354

self.server.GetAlternativeServiceName(self.name))

355

self.rename_count += 1

163

self.name = unicode(self.server

164

.GetAlternativeServiceName(self.name))

356

165

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

357

166

self.name)

358

if remove:

359

self.remove()

167

syslogger.setFormatter(logging.Formatter

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

169

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

170

% self.name))

171

self.remove()

360

172

try:

361

173

self.add()

362

174

except dbus.exceptions.DBusException as error:

363

if (error.get_dbus_name()

364

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

365

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

366

return self.rename(remove=False)

367

else:

368

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

369

self.cleanup()

370

os._exit(1)

371

175

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

176

self.cleanup()

177

os._exit(1)

178

self.rename_count += 1

372

179

def remove(self):

373

180

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

374

181

if self.entry_group_state_changed_match is not None:

376

183

self.entry_group_state_changed_match = None

377

184

if self.group is not None:

378

185

self.group.Reset()

379

380

186

def add(self):

381

187

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

382

188

self.remove()

387

193

avahi.DBUS_INTERFACE_ENTRY_GROUP)

388

194

self.entry_group_state_changed_match = (

389

195

self.group.connect_to_signal(

390

'StateChanged', self.entry_group_state_changed))

196

'StateChanged', self .entry_group_state_changed))

391

197

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

392

198

self.name, self.type)

393

199

self.group.AddService(

399

205

dbus.UInt16(self.port),

400

206

avahi.string_array_to_txt_array(self.TXT))

401

207

self.group.Commit()

402

403

208

def entry_group_state_changed(self, state, error):

404

209

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

405

210

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

411

216

self.rename()

412

217

elif state == avahi.ENTRY_GROUP_FAILURE:

413

218

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

414

str(error))

415

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

416

219

unicode(error))

220

raise AvahiGroupError("State changed: %s"

221

% unicode(error))

417

222

def cleanup(self):

418

223

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

419

224

if self.group is not None:

420

225

try:

421

226

self.group.Free()

422

227

except (dbus.exceptions.UnknownMethodException,

423

dbus.exceptions.DBusException):

228

dbus.exceptions.DBusException) as e:

424

229

pass

425

230

self.group = None

426

231

self.remove()

427

428

232

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

429

233

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

430

234

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

431

bad_states = {

432

avahi.SERVER_INVALID: "Zeroconf server invalid",

433

avahi.SERVER_REGISTERING: None,

434

avahi.SERVER_COLLISION: "Zeroconf server name collision",

435

avahi.SERVER_FAILURE: "Zeroconf server failure",

436

}

235

bad_states = { avahi.SERVER_INVALID:

236

"Zeroconf server invalid",

237

avahi.SERVER_REGISTERING: None,

238

avahi.SERVER_COLLISION:

239

"Zeroconf server name collision",

240

avahi.SERVER_FAILURE:

241

"Zeroconf server failure" }

437

242

if state in bad_states:

438

243

if bad_states[state] is not None:

439

244

if error is None:

442

247

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

443

248

self.cleanup()

444

249

elif state == avahi.SERVER_RUNNING:

445

try:

446

self.add()

447

except dbus.exceptions.DBusException as error:

448

if (error.get_dbus_name()

449

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

450

logger.info("Local Zeroconf service name"

451

" collision.")

452

return self.rename(remove=False)

453

else:

454

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

455

self.cleanup()

456

os._exit(1)

250

self.add()

457

251

else:

458

252

if error is None:

459

253

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

460

254

else:

461

255

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

462

463

256

def activate(self):

464

257

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

465

258

if self.server is None:

469

262

follow_name_owner_changes=True),

470

263

avahi.DBUS_INTERFACE_SERVER)

471

264

self.server.connect_to_signal("StateChanged",

472

self.server_state_changed)

265

self.server_state_changed)

473

266

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

474

267

475

268

476

class AvahiServiceToSyslog(AvahiService):

477

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

478

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

479

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

480

syslogger.setFormatter(logging.Formatter(

481

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

482

.format(self.name)))

483

return ret

484

485

# Pretend that we have a GnuTLS module

486

class GnuTLS(object):

487

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

488

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

489

490

_library = ctypes.cdll.LoadLibrary(

491

ctypes.util.find_library("gnutls"))

492

_need_version = b"3.3.0"

493

def __init__(self):

494

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

495

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

496

# happens.

497

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

498

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

499

.format(self._need_version))

500

501

# Unless otherwise indicated, the constants and types below are

502

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

503

504

# Constants

505

E_SUCCESS = 0

506

E_INTERRUPTED = -52

507

E_AGAIN = -28

508

CRT_OPENPGP = 2

509

CLIENT = 2

510

SHUT_RDWR = 0

511

CRD_CERTIFICATE = 1

512

E_NO_CERTIFICATE_FOUND = -49

513

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

514

515

# Types

516

class session_int(ctypes.Structure):

517

_fields_ = []

518

session_t = ctypes.POINTER(session_int)

519

class certificate_credentials_st(ctypes.Structure):

520

_fields_ = []

521

certificate_credentials_t = ctypes.POINTER(

522

certificate_credentials_st)

523

certificate_type_t = ctypes.c_int

524

class datum_t(ctypes.Structure):

525

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

526

('size', ctypes.c_uint)]

527

class openpgp_crt_int(ctypes.Structure):

528

_fields_ = []

529

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

530

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

531

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

532

credentials_type_t = ctypes.c_int

533

transport_ptr_t = ctypes.c_void_p

534

close_request_t = ctypes.c_int

535

536

# Exceptions

537

class Error(Exception):

538

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

539

# exception might be raised from within GnuTLS.__init__,

540

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

541

# global variable has happened.

542

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

543

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

544

# code is passed, convert it to a string with

545

# gnutls.strerror()

546

self.code = code

547

if message is None and code is not None:

548

message = GnuTLS.strerror(code)

549

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

550

message, *args)

551

552

class CertificateSecurityError(Error):

553

pass

554

555

# Classes

556

class Credentials(object):

557

def __init__(self):

558

self._c_object = gnutls.certificate_credentials_t()

559

gnutls.certificate_allocate_credentials(

560

ctypes.byref(self._c_object))

561

self.type = gnutls.CRD_CERTIFICATE

562

563

def __del__(self):

564

gnutls.certificate_free_credentials(self._c_object)

565

566

class ClientSession(object):

567

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

568

self._c_object = gnutls.session_t()

569

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

570

gnutls.set_default_priority(self._c_object)

571

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

572

gnutls.handshake_set_private_extensions(self._c_object,

573

True)

574

self.socket = socket

575

if credentials is None:

576

credentials = gnutls.Credentials()

577

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

578

ctypes.cast(credentials._c_object,

579

ctypes.c_void_p))

580

self.credentials = credentials

581

582

def __del__(self):

583

gnutls.deinit(self._c_object)

584

585

def handshake(self):

586

return gnutls.handshake(self._c_object)

587

588

def send(self, data):

589

data = bytes(data)

590

data_len = len(data)

591

while data_len > 0:

592

data_len -= gnutls.record_send(self._c_object,

593

data[-data_len:],

594

data_len)

595

596

def bye(self):

597

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

598

599

# Error handling functions

600

def _error_code(result):

601

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

602

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

603

if result >= 0:

604

return result

605

if result == gnutls.E_NO_CERTIFICATE_FOUND:

606

raise gnutls.CertificateSecurityError(code = result)

607

raise gnutls.Error(code = result)

608

609

def _retry_on_error(result, func, arguments):

610

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

611

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

612

while result < 0:

613

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

614

return _error_code(result)

615

result = func(*arguments)

616

return result

617

618

# Unless otherwise indicated, the function declarations below are

619

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

620

621

# Functions

622

priority_set_direct = _library.gnutls_priority_set_direct

623

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

624

ctypes.POINTER(ctypes.c_char_p)]

625

priority_set_direct.restype = _error_code

626

627

init = _library.gnutls_init

628

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

629

init.restype = _error_code

630

631

set_default_priority = _library.gnutls_set_default_priority

632

set_default_priority.argtypes = [session_t]

633

set_default_priority.restype = _error_code

634

635

record_send = _library.gnutls_record_send

636

record_send.argtypes = [session_t, ctypes.c_void_p,

637

ctypes.c_size_t]

638

record_send.restype = ctypes.c_ssize_t

639

record_send.errcheck = _retry_on_error

640

641

certificate_allocate_credentials = (

642

_library.gnutls_certificate_allocate_credentials)

643

certificate_allocate_credentials.argtypes = [

644

ctypes.POINTER(certificate_credentials_t)]

645

certificate_allocate_credentials.restype = _error_code

646

647

certificate_free_credentials = (

648

_library.gnutls_certificate_free_credentials)

649

certificate_free_credentials.argtypes = [certificate_credentials_t]

650

certificate_free_credentials.restype = None

651

652

handshake_set_private_extensions = (

653

_library.gnutls_handshake_set_private_extensions)

654

handshake_set_private_extensions.argtypes = [session_t,

655

ctypes.c_int]

656

handshake_set_private_extensions.restype = None

657

658

credentials_set = _library.gnutls_credentials_set

659

credentials_set.argtypes = [session_t, credentials_type_t,

660

ctypes.c_void_p]

661

credentials_set.restype = _error_code

662

663

strerror = _library.gnutls_strerror

664

strerror.argtypes = [ctypes.c_int]

665

strerror.restype = ctypes.c_char_p

666

667

certificate_type_get = _library.gnutls_certificate_type_get

668

certificate_type_get.argtypes = [session_t]

669

certificate_type_get.restype = _error_code

670

671

certificate_get_peers = _library.gnutls_certificate_get_peers

672

certificate_get_peers.argtypes = [session_t,

673

ctypes.POINTER(ctypes.c_uint)]

674

certificate_get_peers.restype = ctypes.POINTER(datum_t)

675

676

global_set_log_level = _library.gnutls_global_set_log_level

677

global_set_log_level.argtypes = [ctypes.c_int]

678

global_set_log_level.restype = None

679

680

global_set_log_function = _library.gnutls_global_set_log_function

681

global_set_log_function.argtypes = [log_func]

682

global_set_log_function.restype = None

683

684

deinit = _library.gnutls_deinit

685

deinit.argtypes = [session_t]

686

deinit.restype = None

687

688

handshake = _library.gnutls_handshake

689

handshake.argtypes = [session_t]

690

handshake.restype = _error_code

691

handshake.errcheck = _retry_on_error

692

693

transport_set_ptr = _library.gnutls_transport_set_ptr

694

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

695

transport_set_ptr.restype = None

696

697

bye = _library.gnutls_bye

698

bye.argtypes = [session_t, close_request_t]

699

bye.restype = _error_code

700

bye.errcheck = _retry_on_error

701

702

check_version = _library.gnutls_check_version

703

check_version.argtypes = [ctypes.c_char_p]

704

check_version.restype = ctypes.c_char_p

705

706

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

707

708

openpgp_crt_init = _library.gnutls_openpgp_crt_init

709

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

710

openpgp_crt_init.restype = _error_code

711

712

openpgp_crt_import = _library.gnutls_openpgp_crt_import

713

openpgp_crt_import.argtypes = [openpgp_crt_t,

714

ctypes.POINTER(datum_t),

715

openpgp_crt_fmt_t]

716

openpgp_crt_import.restype = _error_code

717

718

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

719

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

720

ctypes.POINTER(ctypes.c_uint)]

721

openpgp_crt_verify_self.restype = _error_code

722

723

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

724

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

725

openpgp_crt_deinit.restype = None

726

727

openpgp_crt_get_fingerprint = (

728

_library.gnutls_openpgp_crt_get_fingerprint)

729

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

730

ctypes.c_void_p,

731

ctypes.POINTER(

732

ctypes.c_size_t)]

733

openpgp_crt_get_fingerprint.restype = _error_code

734

735

# Remove non-public functions

736

del _error_code, _retry_on_error

737

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

738

gnutls = GnuTLS()

739

740

def call_pipe(connection, # : multiprocessing.Connection

741

func, *args, **kwargs):

742

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

743

744

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

745

return value on the provided multiprocessing.Connection.

746

"""

747

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

748

connection.close()

749

269

def _timedelta_to_milliseconds(td):

270

"Convert a datetime.timedelta() to milliseconds"

271

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

272

+ (td.seconds * 1000)

273

+ (td.microseconds // 1000))

274

750

275

class Client(object):

751

276

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

752

277

753

278

Attributes:

754

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

279

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

755

280

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

756

281

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

757

282

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

758

283

to see if the client lives.

759

284

'None' if no process is running.

760

checker_callback_tag: a GObject event source tag, or None

285

checker_callback_tag: a gobject event source tag, or None

761

286

checker_command: string; External command which is run to check

762

287

if client lives. %() expansions are done at

763

288

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

764

289

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

765

checker_initiator_tag: a GObject event source tag, or None

290

checker_initiator_tag: a gobject event source tag, or None

766

291

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

767

client_structure: Object describing what attributes a client has

768

and is used for storing the client at exit

769

292

current_checker_command: string; current running checker_command

770

disable_initiator_tag: a GObject event source tag, or None

293

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

294

disable_initiator_tag: a gobject event source tag, or None

771

295

enabled: bool()

772

296

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

773

297

uniquely identify the client

775

299

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

776

300

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

777

301

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

778

last_checker_status: integer between 0 and 255 reflecting exit

779

status of last checker. -1 reflects crashed

780

checker, -2 means no checker completed yet.

781

last_checker_signal: The signal which killed the last checker, if

782

last_checker_status is -1

783

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

302

last_enabled: datetime.datetime(); (UTC)

784

303

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

785

304

D-Bus identifiers

786

305

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

787

306

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

788

307

until this client is disabled

789

extended_timeout: extra long timeout when secret has been sent

308

extended_timeout: extra long timeout when password has been sent

790

309

runtime_expansions: Allowed attributes for runtime expansion.

791

310

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

792

311

disabled, or None

793

server_settings: The server_settings dict from main()

794

312

"""

795

313

796

314

runtime_expansions = ("approval_delay", "approval_duration",

797

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

798

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

799

"last_approval_request", "last_checked_ok",

315

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

316

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

800

317

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

801

client_defaults = {

802

"timeout": "PT5M",

803

"extended_timeout": "PT15M",

804

"interval": "PT2M",

805

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

806

"host": "",

807

"approval_delay": "PT0S",

808

"approval_duration": "PT1S",

809

"approved_by_default": "True",

810

"enabled": "True",

811

}

812

813

@staticmethod

814

def config_parser(config):

815

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

816

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

817

with exceptions for any special settings as defined above.

818

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

819

value given the same arguments.

820

"""

821

settings = {}

822

for client_name in config.sections():

823

section = dict(config.items(client_name))

824

client = settings[client_name] = {}

825

826

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

827

# Reformat values from string types to Python types

828

client["approved_by_default"] = config.getboolean(

829

client_name, "approved_by_default")

830

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

831

"enabled")

832

833

# Uppercase and remove spaces from fingerprint for later

834

# comparison purposes with return value from the

835

# fingerprint() function

836

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

837

.replace(" ", ""))

838

if "secret" in section:

839

client["secret"] = codecs.decode(section["secret"]

840

.encode("utf-8"),

841

"base64")

842

elif "secfile" in section:

843

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

844

(section["secfile"])),

845

"rb") as secfile:

846

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

847

else:

848

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

849

.format(section))

850

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

851

client["extended_timeout"] = string_to_delta(

852

section["extended_timeout"])

853

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

854

client["approval_delay"] = string_to_delta(

855

section["approval_delay"])

856

client["approval_duration"] = string_to_delta(

857

section["approval_duration"])

858

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

859

client["last_approval_request"] = None

860

client["last_checked_ok"] = None

861

client["last_checker_status"] = -2

862

863

return settings

864

865

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

318

319

def timeout_milliseconds(self):

320

"Return the 'timeout' attribute in milliseconds"

321

return _timedelta_to_milliseconds(self.timeout)

322

323

def extended_timeout_milliseconds(self):

324

"Return the 'extended_timeout' attribute in milliseconds"

325

return _timedelta_to_milliseconds(self.extended_timeout)

326

327

def interval_milliseconds(self):

328

"Return the 'interval' attribute in milliseconds"

329

return _timedelta_to_milliseconds(self.interval)

330

331

def approval_delay_milliseconds(self):

332

return _timedelta_to_milliseconds(self.approval_delay)

333

334

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

335

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

336

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

337

attribute."""

866

338

self.name = name

867

if server_settings is None:

868

server_settings = {}

869

self.server_settings = server_settings

870

# adding all client settings

871

for setting, value in settings.items():

872

setattr(self, setting, value)

873

874

if self.enabled:

875

if not hasattr(self, "last_enabled"):

876

self.last_enabled = datetime.datetime.utcnow()

877

if not hasattr(self, "expires"):

878

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

879

+ self.timeout)

880

else:

881

self.last_enabled = None

882

self.expires = None

883

339

if config is None:

340

config = {}

884

341

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

342

# Uppercase and remove spaces from fingerprint for later

343

# comparison purposes with return value from the fingerprint()

344

# function

345

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

346

.replace(" ", ""))

885

347

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

886

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

887

datetime.datetime.utcnow())

888

889

# attributes specific for this server instance

348

if "secret" in config:

349

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

350

elif "secfile" in config:

351

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

352

(config["secfile"])),

353

"rb") as secfile:

354

self.secret = secfile.read()

355

else:

356

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

357

% self.name)

358

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

359

self.created = datetime.datetime.utcnow()

360

self.enabled = False

361

self.last_approval_request = None

362

self.last_enabled = None

363

self.last_checked_ok = None

364

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

365

self.extended_timeout = string_to_delta(config

366

["extended_timeout"])

367

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

368

self.disable_hook = disable_hook

890

369

self.checker = None

891

370

self.checker_initiator_tag = None

892

371

self.disable_initiator_tag = None

372

self.expires = None

893

373

self.checker_callback_tag = None

374

self.checker_command = config["checker"]

894

375

self.current_checker_command = None

895

self.approved = None

376

self.last_connect = None

377

self._approved = None

378

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

379

True)

896

380

self.approvals_pending = 0

897

self.changedstate = multiprocessing_manager.Condition(

898

multiprocessing_manager.Lock())

899

self.client_structure = [attr

900

for attr in self.__dict__.keys()

901

if not attr.startswith("_")]

902

self.client_structure.append("client_structure")

903

904

for name, t in inspect.getmembers(

905

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

906

if not name.startswith("_"):

907

self.client_structure.append(name)

381

self.approval_delay = string_to_delta(

382

config["approval_delay"])

383

self.approval_duration = string_to_delta(

384

config["approval_duration"])

385

self.changedstate = (multiprocessing_manager

386

.Condition(multiprocessing_manager

387

.Lock()))

908

388

909

# Send notice to process children that client state has changed

910

389

def send_changedstate(self):

911

with self.changedstate:

912

self.changedstate.notify_all()

390

self.changedstate.acquire()

391

self.changedstate.notify_all()

392

self.changedstate.release()

913

393

914

394

def enable(self):

915

395

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

916

396

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

917

397

# Already enabled

918

398

return

399

self.send_changedstate()

400

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

401

# and every interval from then on.

402

self.checker_initiator_tag = (gobject.timeout_add

403

(self.interval_milliseconds(),

404

self.start_checker))

405

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

919

406

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

407

self.disable_initiator_tag = (gobject.timeout_add

408

(self.timeout_milliseconds(),

409

self.disable))

920

410

self.enabled = True

921

411

self.last_enabled = datetime.datetime.utcnow()

922

self.init_checker()

923

self.send_changedstate()

412

# Also start a new checker *right now*.

413

self.start_checker()

924

414

925

415

def disable(self, quiet=True):

926

416

"""Disable this client."""

927

417

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

928

418

return False

929

419

if not quiet:

420

self.send_changedstate()

421

if not quiet:

930

422

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

931

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

932

GObject.source_remove(self.disable_initiator_tag)

423

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

424

gobject.source_remove(self.disable_initiator_tag)

933

425

self.disable_initiator_tag = None

934

426

self.expires = None

935

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

936

GObject.source_remove(self.checker_initiator_tag)

427

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

428

gobject.source_remove(self.checker_initiator_tag)

937

429

self.checker_initiator_tag = None

938

430

self.stop_checker()

431

if self.disable_hook:

432

self.disable_hook(self)

939

433

self.enabled = False

940

if not quiet:

941

self.send_changedstate()

942

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

434

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

943

435

return False

944

436

945

437

def __del__(self):

438

self.disable_hook = None

946

439

self.disable()

947

440

948

def init_checker(self):

949

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

950

# and every interval from then on.

951

if self.checker_initiator_tag is not None:

952

GObject.source_remove(self.checker_initiator_tag)

953

self.checker_initiator_tag = GObject.timeout_add(

954

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

955

self.start_checker)

956

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

957

if self.disable_initiator_tag is not None:

958

GObject.source_remove(self.disable_initiator_tag)

959

self.disable_initiator_tag = GObject.timeout_add(

960

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

961

# Also start a new checker *right now*.

962

self.start_checker()

963

964

def checker_callback(self, source, condition, connection,

965

command):

441

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

966

442

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

967

443

self.checker_callback_tag = None

968

444

self.checker = None

969

# Read return code from connection (see call_pipe)

970

returncode = connection.recv()

971

connection.close()

972

973

if returncode >= 0:

974

self.last_checker_status = returncode

975

self.last_checker_signal = None

976

if self.last_checker_status == 0:

445

if os.WIFEXITED(condition):

446

exitstatus = os.WEXITSTATUS(condition)

447

if exitstatus == 0:

977

448

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

978

449

vars(self))

979

450

self.checked_ok()

980

451

else:

981

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

452

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

453

vars(self))

982

454

else:

983

self.last_checker_status = -1

984

self.last_checker_signal = -returncode

985

455

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

986

456

vars(self))

987

return False

988

989

def checked_ok(self):

990

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

991

self.last_checked_ok = datetime.datetime.utcnow()

992

self.last_checker_status = 0

993

self.last_checker_signal = None

994

self.bump_timeout()

995

996

def bump_timeout(self, timeout=None):

997

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

457

458

def checked_ok(self, timeout=None):

459

"""Bump up the timeout for this client.

460

461

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

462

alive and well.

463

"""

998

464

if timeout is None:

999

465

timeout = self.timeout

466

self.last_checked_ok = datetime.datetime.utcnow()

1000

467

if self.disable_initiator_tag is not None:

1001

GObject.source_remove(self.disable_initiator_tag)

1002

self.disable_initiator_tag = None

468

gobject.source_remove(self.disable_initiator_tag)

1003

469

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

1004

self.disable_initiator_tag = GObject.timeout_add(

1005

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

470

self.disable_initiator_tag = (gobject.timeout_add

471

(_timedelta_to_milliseconds

472

(timeout), self.disable))

1006

473

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

1007

474

1008

475

def need_approval(self):

1014

481

If a checker already exists, leave it running and do

1015

482

nothing."""

1016

483

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

1017

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

1018

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

1019

# would inevitably timeout, since no checker would get a

1020

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

484

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

485

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

486

# client would inevitably timeout, since no checker would get

487

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

1021

488

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

1022

489

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

1023

490

# should be.

1024

491

1025

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

1026

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

1027

self.checker.join()

1028

self.checker = None

492

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

493

try:

494

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

495

except (AttributeError, OSError) as error:

496

if (isinstance(error, OSError)

497

and error.errno != errno.ECHILD):

498

raise error

499

else:

500

if pid:

501

logger.warning("Checker was a zombie")

502

gobject.source_remove(self.checker_callback_tag)

503

self.checker_callback(pid, status,

504

self.current_checker_command)

1029

505

# Start a new checker if needed

1030

506

if self.checker is None:

1031

# Escape attributes for the shell

1032

escaped_attrs = {

1033

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

1034

for attr in self.runtime_expansions }

1035

507

try:

1036

command = self.checker_command % escaped_attrs

1037

except TypeError as error:

1038

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

1039

self.checker_command,

1040

exc_info=error)

1041

return True # Try again later

508

# In case checker_command has exactly one % operator

509

command = self.checker_command % self.host

510

except TypeError:

511

# Escape attributes for the shell

512

escaped_attrs = dict(

513

(attr,

514

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

515

errors=

516

'replace')))

517

for attr in

518

self.runtime_expansions)

519

520

try:

521

command = self.checker_command % escaped_attrs

522

except TypeError as error:

523

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

524

' %s', self.checker_command, error)

525

return True # Try again later

1042

526

self.current_checker_command = command

1043

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

1044

self.name)

1045

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

1046

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

1047

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

1048

# always replaced by /dev/null.)

1049

# The exception is when not debugging but nevertheless

1050

# running in the foreground; use the previously

1051

# created wnull.

1052

popen_args = { "close_fds": True,

1053

"shell": True,

1054

"cwd": "/" }

1055

if (not self.server_settings["debug"]

1056

and self.server_settings["foreground"]):

1057

popen_args.update({"stdout": wnull,

1058

"stderr": wnull })

1059

pipe = multiprocessing.Pipe(duplex = False)

1060

self.checker = multiprocessing.Process(

1061

target = call_pipe,

1062

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

1063

kwargs = popen_args)

1064

self.checker.start()

1065

self.checker_callback_tag = GObject.io_add_watch(

1066

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

1067

self.checker_callback, pipe[0], command)

1068

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

527

try:

528

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

529

command, self.name)

530

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

531

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

532

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

533

# always replaced by /dev/null.)

534

self.checker = subprocess.Popen(command,

535

close_fds=True,

536

shell=True, cwd="/")

537

self.checker_callback_tag = (gobject.child_watch_add

538

(self.checker.pid,

539

self.checker_callback,

540

data=command))

541

# The checker may have completed before the gobject

542

# watch was added. Check for this.

543

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

544

if pid:

545

gobject.source_remove(self.checker_callback_tag)

546

self.checker_callback(pid, status, command)

547

except OSError as error:

548

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

549

error)

550

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

1069

551

return True

1070

552

1071

553

def stop_checker(self):

1072

554

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

1073

555

if self.checker_callback_tag:

1074

GObject.source_remove(self.checker_callback_tag)

556

gobject.source_remove(self.checker_callback_tag)

1075

557

self.checker_callback_tag = None

1076

558

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

1077

559

return

1078

560

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

1079

self.checker.terminate()

561

try:

562

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

563

#time.sleep(0.5)

564

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

565

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

566

except OSError as error:

567

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

568

raise

1080

569

self.checker = None

1081

570

1082

571

1083

def dbus_service_property(dbus_interface,

1084

signature="v",

1085

access="readwrite",

1086

byte_arrays=False):

572

def dbus_service_property(dbus_interface, signature="v",

573

access="readwrite", byte_arrays=False):

1087

574

"""Decorators for marking methods of a DBusObjectWithProperties to

1088

575

become properties on the D-Bus.

1089

576

1098

585

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

1099

586

if byte_arrays and signature != "ay":

1100

587

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

1101

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

1102

588

" signature %r" % signature)

1103

589

def decorator(func):

1104

590

func._dbus_is_property = True

1105

591

func._dbus_interface = dbus_interface

1110

596

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

1111

597

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1112

598

return func

1113

1114

return decorator

1115

1116

1117

def dbus_interface_annotations(dbus_interface):

1118

"""Decorator for marking functions returning interface annotations

1119

1120

Usage:

1121

1122

@dbus_interface_annotations("org.example.Interface")

1123

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

1124

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

1125

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

1126

"false"}

1127

"""

1128

1129

def decorator(func):

1130

func._dbus_is_interface = True

1131

func._dbus_interface = dbus_interface

1132

func._dbus_name = dbus_interface

1133

return func

1134

1135

return decorator

1136

1137

1138

def dbus_annotations(annotations):

1139

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

1140

Usage:

1141

1142

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

1143

"org.freedesktop.DBus.Property."

1144

"EmitsChangedSignal": "false"})

1145

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

1146

access="r")

1147

def Property_dbus_property(self):

1148

return dbus.Boolean(False)

1149

1150

See also the DBusObjectWithAnnotations class.

1151

"""

1152

1153

def decorator(func):

1154

func._dbus_annotations = annotations

1155

return func

1156

1157

599

return decorator

1158

600

1159

601

1160

602

class DBusPropertyException(dbus.exceptions.DBusException):

1161

603

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

1162

604

"""

1163

pass

605

def __unicode__(self):

606

return unicode(str(self))

1164

607

1165

608

1166

609

class DBusPropertyAccessException(DBusPropertyException):

1175

618

pass

1176

619

1177

620

1178

class DBusObjectWithAnnotations(dbus.service.Object):

1179

"""A D-Bus object with annotations.

1180

1181

Classes inheriting from this can use the dbus_annotations

1182

decorator to add annotations to methods or signals.

1183

"""

1184

1185

@staticmethod

1186

def _is_dbus_thing(thing):

1187

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

1188

1189

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

1190

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

1191

"""

1192

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

1193

False)

1194

1195

def _get_all_dbus_things(self, thing):

1196

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

1197

"""

1198

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

1199

athing.__get__(self))

1200

for cls in self.__class__.__mro__

1201

for name, athing in

1202

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

1203

1204

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1205

out_signature = "s",

1206

path_keyword = 'object_path',

1207

connection_keyword = 'connection')

1208

def Introspect(self, object_path, connection):

1209

"""Overloading of standard D-Bus method.

1210

1211

Inserts annotation tags on methods and signals.

1212

"""

1213

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

1214

connection)

1215

try:

1216

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

1217

1218

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

1219

# Add annotation tags

1220

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

1221

for tag in if_tag.getElementsByTagName(typ):

1222

annots = dict()

1223

for name, prop in (self.

1224

_get_all_dbus_things(typ)):

1225

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

1226

and prop._dbus_interface

1227

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

1228

annots.update(getattr(

1229

prop, "_dbus_annotations", {}))

1230

for name, value in annots.items():

1231

ann_tag = document.createElement(

1232

"annotation")

1233

ann_tag.setAttribute("name", name)

1234

ann_tag.setAttribute("value", value)

1235

tag.appendChild(ann_tag)

1236

# Add interface annotation tags

1237

for annotation, value in dict(

1238

itertools.chain.from_iterable(

1239

annotations().items()

1240

for name, annotations

1241

in self._get_all_dbus_things("interface")

1242

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

1243

)).items():

1244

ann_tag = document.createElement("annotation")

1245

ann_tag.setAttribute("name", annotation)

1246

ann_tag.setAttribute("value", value)

1247

if_tag.appendChild(ann_tag)

1248

# Fix argument name for the Introspect method itself

1249

if (if_tag.getAttribute("name")

1250

== dbus.INTROSPECTABLE_IFACE):

1251

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

1252

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

1253

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

1254

if (arg.getAttribute("direction")

1255

== "out"):

1256

arg.setAttribute("name",

1257

"xml_data")

1258

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

1259

document.unlink()

1260

except (AttributeError, xml.dom.DOMException,

1261

xml.parsers.expat.ExpatError) as error:

1262

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

1263

exc_info=error)

1264

return xmlstring

1265

1266

1267

class DBusObjectWithProperties(DBusObjectWithAnnotations):

621

class DBusObjectWithProperties(dbus.service.Object):

1268

622

"""A D-Bus object with properties.

1269

623

1270

624

Classes inheriting from this can use the dbus_service_property

1272

626

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

1273

627

"""

1274

628

629

@staticmethod

630

def _is_dbus_property(obj):

631

return getattr(obj, "_dbus_is_property", False)

632

633

def _get_all_dbus_properties(self):

634

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

635

"""

636

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

637

for cls in self.__class__.__mro__

638

for name, prop in

639

inspect.getmembers(cls, self._is_dbus_property))

640

1275

641

def _get_dbus_property(self, interface_name, property_name):

1276

642

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

1277

643

property with the specified name and interface.

1278

644

"""

1279

for cls in self.__class__.__mro__:

1280

for name, value in inspect.getmembers(

1281

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

645

for cls in self.__class__.__mro__:

646

for name, value in (inspect.getmembers

647

(cls, self._is_dbus_property)):

1282

648

if (value._dbus_name == property_name

1283

649

and value._dbus_interface == interface_name):

1284

650

return value.__get__(self)

1285

651

1286

652

# No such property

1287

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

1288

self.dbus_object_path, interface_name, property_name))

1289

1290

@classmethod

1291

def _get_all_interface_names(cls):

1292

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

1293

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

1294

"_dbus_interface", None)

1295

for x in (inspect.getmro(cls))

1296

for attr in dir(x))

1297

if name is not None)

1298

1299

@dbus.service.method(dbus.PROPERTIES_IFACE,

1300

in_signature="ss",

653

raise DBusPropertyNotFound(self.dbus_object_path + ":"

654

+ interface_name + "."

655

+ property_name)

656

657

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

1301

658

out_signature="v")

1302

659

def Get(self, interface_name, property_name):

1303

660

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

1321

678

# The byte_arrays option is not supported yet on

1322

679

# signatures other than "ay".

1323

680

if prop._dbus_signature != "ay":

1324

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

1325

"'ay' signature {!r}"

1326

.format(prop._dbus_signature))

1327

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

1328

for byte in value))

681

raise ValueError

682

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

683

for byte in value))

1329

684

prop(value)

1330

685

1331

@dbus.service.method(dbus.PROPERTIES_IFACE,

1332

in_signature="s",

686

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

1333

687

out_signature="a{sv}")

1334

688

def GetAll(self, interface_name):

1335

689

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

1337

691

1338

692

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

1339

693

"""

1340

properties = {}

1341

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

694

all = {}

695

for name, prop in self._get_all_dbus_properties():

1342

696

if (interface_name

1343

697

and interface_name != prop._dbus_interface):

1344

698

# Interface non-empty but did not match

1348

702

continue

1349

703

value = prop()

1350

704

if not hasattr(value, "variant_level"):

1351

properties[name] = value

705

all[name] = value

1352

706

continue

1353

properties[name] = type(value)(

1354

value, variant_level = value.variant_level + 1)

1355

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

1356

1357

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

1358

def PropertiesChanged(self, interface_name, changed_properties,

1359

invalidated_properties):

1360

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

1361

standard.

1362

"""

1363

pass

707

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

708

value.variant_level+1)

709

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

1364

710

1365

711

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1366

712

out_signature="s",

1367

713

path_keyword='object_path',

1368

714

connection_keyword='connection')

1369

715

def Introspect(self, object_path, connection):

1370

"""Overloading of standard D-Bus method.

1371

1372

Inserts property tags and interface annotation tags.

716

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

1373

717

"""

1374

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1375

object_path,

1376

connection)

718

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

719

connection)

1377

720

try:

1378

721

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

1379

1380

722

def make_tag(document, name, prop):

1381

723

e = document.createElement("property")

1382

724

e.setAttribute("name", name)

1383

725

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

1384

726

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

1385

727

return e

1386

1387

728

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

1388

# Add property tags

1389

729

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

1390

730

for name, prop

1391

in self._get_all_dbus_things("property")

731

in self._get_all_dbus_properties()

1392

732

if prop._dbus_interface

1393

733

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

1394

734

if_tag.appendChild(tag)

1395

# Add annotation tags for properties

1396

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

1397

annots = dict()

1398

for name, prop in self._get_all_dbus_things(

1399

"property"):

1400

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

1401

and prop._dbus_interface

1402

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

1403

annots.update(getattr(

1404

prop, "_dbus_annotations", {}))

1405

for name, value in annots.items():

1406

ann_tag = document.createElement(

1407

"annotation")

1408

ann_tag.setAttribute("name", name)

1409

ann_tag.setAttribute("value", value)

1410

tag.appendChild(ann_tag)

1411

735

# Add the names to the return values for the

1412

736

# "org.freedesktop.DBus.Properties" methods

1413

737

if (if_tag.getAttribute("name")

1428

752

except (AttributeError, xml.dom.DOMException,

1429

753

xml.parsers.expat.ExpatError) as error:

1430

754

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

1431

exc_info=error)

1432

return xmlstring

1433

1434

try:

1435

dbus.OBJECT_MANAGER_IFACE

1436

except AttributeError:

1437

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

1438

1439

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1440

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

1441

1442

Classes inheriting from this exposes the standard

1443

GetManagedObjects call and the InterfacesAdded and

1444

InterfacesRemoved signals on the standard

1445

"org.freedesktop.DBus.ObjectManager" interface.

1446

1447

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

1448

manually.

1449

"""

1450

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1451

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

1452

def GetManagedObjects(self):

1453

"""This function must be overridden"""

1454

raise NotImplementedError()

1455

1456

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1457

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

1458

def InterfacesAdded(self, object_path, interfaces_and_properties):

1459

pass

1460

1461

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

1462

def InterfacesRemoved(self, object_path, interfaces):

1463

pass

1464

1465

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1466

out_signature = "s",

1467

path_keyword = 'object_path',

1468

connection_keyword = 'connection')

1469

def Introspect(self, object_path, connection):

1470

"""Overloading of standard D-Bus method.

1471

1472

Override return argument name of GetManagedObjects to be

1473

"objpath_interfaces_and_properties"

1474

"""

1475

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1476

object_path,

1477

connection)

1478

try:

1479

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

1480

1481

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

1482

# Fix argument name for the GetManagedObjects method

1483

if (if_tag.getAttribute("name")

1484

== dbus.OBJECT_MANAGER_IFACE):

1485

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

1486

if (cn.getAttribute("name")

1487

== "GetManagedObjects"):

1488

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

1489

if (arg.getAttribute("direction")

1490

== "out"):

1491

arg.setAttribute(

1492

"name",

1493

"objpath_interfaces"

1494

"_and_properties")

1495

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

1496

document.unlink()

1497

except (AttributeError, xml.dom.DOMException,

1498

xml.parsers.expat.ExpatError) as error:

1499

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

1500

exc_info = error)

1501

return xmlstring

1502

1503

def datetime_to_dbus(dt, variant_level=0):

755

error)

756

return xmlstring

757

758

759

def datetime_to_dbus (dt, variant_level=0):

1504

760

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

1505

761

if dt is None:

1506

762

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

1507

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

1508

1509

1510

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1511

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

1512

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

1513

interface names according to the "alt_interface_names" mapping.

1514

Usage:

1515

1516

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

1517

"net.example.AlternateInterface"})

1518

class SampleDBusObject(dbus.service.Object):

1519

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

1520

def SampleDBusMethod():

1521

pass

1522

1523

The above "SampleDBusMethod" on "SampleDBusObject" will be

1524

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

1525

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

1526

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

1527

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

1528

1529

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

1530

(from DBusObjectWithProperties) and interfaces (from the

1531

dbus_interface_annotations decorator).

763

return dbus.String(dt.isoformat(),

764

variant_level=variant_level)

765

766

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

767

.__metaclass__):

768

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

769

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

1532

770

"""

1533

1534

def wrapper(cls):

1535

for orig_interface_name, alt_interface_name in (

1536

alt_interface_names.items()):

1537

attr = {}

1538

interface_names = set()

1539

# Go though all attributes of the class

1540

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

771

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

772

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

773

# methods, signals, or properties in them

774

for base in (b for b in bases

775

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

776

# Go though all attributes of the base class

777

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

1541

778

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

1542

779

# with the wrong interface name

1543

780

if (not hasattr(attribute, "_dbus_interface")

1544

or not attribute._dbus_interface.startswith(

1545

orig_interface_name)):

781

or not attribute._dbus_interface

782

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

1546

783

continue

1547

784

# Create an alternate D-Bus interface name based on

1548

785

# the current name

1549

alt_interface = attribute._dbus_interface.replace(

1550

orig_interface_name, alt_interface_name)

1551

interface_names.add(alt_interface)

786

alt_interface = (attribute._dbus_interface

787

.replace("se.recompile.Mandos",

788

"se.bsnet.fukt.Mandos"))

1552

789

# Is this a D-Bus signal?

1553

790

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

1554

# Extract the original non-method undecorated

1555

# function by black magic

1556

if sys.version_info.major == 2:

1557

nonmethod_func = (dict(

791

# Extract the original non-method function by

792

# black magic

793

nonmethod_func = (dict(

1558

794

zip(attribute.func_code.co_freevars,

1559

attribute.__closure__))

1560

["func"].cell_contents)

1561

else:

1562

nonmethod_func = (dict(

1563

zip(attribute.__code__.co_freevars,

1564

attribute.__closure__))

1565

["func"].cell_contents)

795

attribute.__closure__))["func"]

796

.cell_contents)

1566

797

# Create a new, but exactly alike, function

1567

798

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

1568

799

# with the alternate D-Bus interface name

1569

new_function = copy_function(nonmethod_func)

1570

new_function = (dbus.service.signal(

1571

alt_interface,

1572

attribute._dbus_signature)(new_function))

1573

# Copy annotations, if any

1574

try:

1575

new_function._dbus_annotations = dict(

1576

attribute._dbus_annotations)

1577

except AttributeError:

1578

pass

800

new_function = (dbus.service.signal

801

(alt_interface,

802

attribute._dbus_signature)

803

(types.FunctionType(

804

nonmethod_func.func_code,

805

nonmethod_func.func_globals,

806

nonmethod_func.func_name,

807

nonmethod_func.func_defaults,

808

nonmethod_func.func_closure)))

1579

809

# Define a creator of a function to call both the

1580

# original and alternate functions, so both the

1581

# original and alternate signals gets sent when

1582

# the function is called

810

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

811

# signals gets sent when the function is called

1583

812

def fixscope(func1, func2):

1584

813

"""This function is a scope container to pass

1585

814

func1 and func2 to the "call_both" function

1586

815

outside of its arguments"""

1587

1588

@functools.wraps(func2)

1589

816

def call_both(*args, **kwargs):

1590

817

"""This function will emit two D-Bus

1591

818

signals by calling func1 and func2"""

1592

819

func1(*args, **kwargs)

1593

820

func2(*args, **kwargs)

1594

# Make wrapper function look like a D-Bus signal

1595

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

1596

if name.startswith("_dbus_"):

1597

setattr(call_both, name, attr)

1598

1599

821

return call_both

1600

822

# Create the "call_both" function and add it to

1601

823

# the class

1602

attr[attrname] = fixscope(attribute, new_function)

824

attr[attrname] = fixscope(attribute,

825

new_function)

1603

826

# Is this a D-Bus method?

1604

827

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

1605

828

# Create a new, but exactly alike, function

1606

829

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

1607

830

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

1608

831

# to the class.

1609

attr[attrname] = (

1610

dbus.service.method(

1611

alt_interface,

1612

attribute._dbus_in_signature,

1613

attribute._dbus_out_signature)

1614

(copy_function(attribute)))

1615

# Copy annotations, if any

1616

try:

1617

attr[attrname]._dbus_annotations = dict(

1618

attribute._dbus_annotations)

1619

except AttributeError:

1620

pass

832

attr[attrname] = (dbus.service.method

833

(alt_interface,

834

attribute._dbus_in_signature,

835

attribute._dbus_out_signature)

836

(types.FunctionType

837

(attribute.func_code,

838

attribute.func_globals,

839

attribute.func_name,

840

attribute.func_defaults,

841

attribute.func_closure)))

1621

842

# Is this a D-Bus property?

1622

843

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

1623

844

# Create a new, but exactly alike, function

1624

845

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

1625

846

# property with the alternate D-Bus interface

1626

847

# name. Add it to the class.

1627

attr[attrname] = (dbus_service_property(

1628

alt_interface, attribute._dbus_signature,

1629

attribute._dbus_access,

1630

attribute._dbus_get_args_options

1631

["byte_arrays"])

1632

(copy_function(attribute)))

1633

# Copy annotations, if any

1634

try:

1635

attr[attrname]._dbus_annotations = dict(

1636

attribute._dbus_annotations)

1637

except AttributeError:

1638

pass

1639

# Is this a D-Bus interface?

1640

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

1641

# Create a new, but exactly alike, function

1642

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

1643

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

1644

# to the class.

1645

attr[attrname] = (

1646

dbus_interface_annotations(alt_interface)

1647

(copy_function(attribute)))

1648

if deprecate:

1649

# Deprecate all alternate interfaces

1650

iname="_AlternateDBusNames_interface_annotation{}"

1651

for interface_name in interface_names:

1652

1653

@dbus_interface_annotations(interface_name)

1654

def func(self):

1655

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

1656

"true" }

1657

# Find an unused name

1658

for aname in (iname.format(i)

1659

for i in itertools.count()):

1660

if aname not in attr:

1661

attr[aname] = func

1662

break

1663

if interface_names:

1664

# Replace the class with a new subclass of it with

1665

# methods, signals, etc. as created above.

1666

if sys.version_info.major == 2:

1667

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

1668

(cls, ), attr)

1669

else:

1670

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

1671

(cls, ), attr)

1672

return cls

1673

1674

return wrapper

1675

1676

1677

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

1678

"se.bsnet.fukt.Mandos"})

848

attr[attrname] = (dbus_service_property

849

(alt_interface,

850

attribute._dbus_signature,

851

attribute._dbus_access,

852

attribute

853

._dbus_get_args_options

854

["byte_arrays"])

855

(types.FunctionType

856

(attribute.func_code,

857

attribute.func_globals,

858

attribute.func_name,

859

attribute.func_defaults,

860

attribute.func_closure)))

861

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

862

1679

863

class ClientDBus(Client, DBusObjectWithProperties):

1680

864

"""A Client class using D-Bus

1681

865

1685

869

"""

1686

870

1687

871

runtime_expansions = (Client.runtime_expansions

1688

+ ("dbus_object_path", ))

1689

1690

_interface = "se.recompile.Mandos.Client"

872

+ ("dbus_object_path",))

1691

873

1692

874

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

1693

875

1694

876

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

877

self._approvals_pending = 0

1695

878

self.bus = bus

1696

879

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

1697

880

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

1698

881

# the D-Bus

1699

client_object_name = str(self.name).translate(

882

client_object_name = unicode(self.name).translate(

1700

883

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

1701

884

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

1702

self.dbus_object_path = dbus.ObjectPath(

1703

"/clients/" + client_object_name)

885

self.dbus_object_path = (dbus.ObjectPath

886

("/clients/" + client_object_name))

1704

887

DBusObjectWithProperties.__init__(self, self.bus,

1705

888

self.dbus_object_path)

1706

1707

def notifychangeproperty(transform_func, dbus_name,

1708

type_func=lambda x: x,

1709

variant_level=1,

1710

invalidate_only=False,

1711

_interface=_interface):

889

890

def notifychangeproperty(transform_func,

891

dbus_name, type_func=lambda x: x,

892

variant_level=1):

1712

893

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

1713

894

its changes to DBus.

1714

895

1715

896

transform_fun: Function that takes a value and a variant_level

1716

897

and transforms it to a D-Bus type.

1717

898

dbus_name: D-Bus name of the variable

1719

900

to the D-Bus. Default: no transform

1720

901

variant_level: D-Bus variant level. Default: 1

1721

902

"""

1722

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

1723

903

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

1724

904

def setter(self, value):

1725

905

if hasattr(self, "dbus_object_path"):

1726

906

if (not hasattr(self, attrname) or

1727

907

type_func(getattr(self, attrname, None))

1728

908

!= type_func(value)):

1729

if invalidate_only:

1730

self.PropertiesChanged(

1731

_interface, dbus.Dictionary(),

1732

dbus.Array((dbus_name, )))

1733

else:

1734

dbus_value = transform_func(

1735

type_func(value),

1736

variant_level = variant_level)

1737

self.PropertyChanged(dbus.String(dbus_name),

1738

dbus_value)

1739

self.PropertiesChanged(

1740

_interface,

1741

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

1742

dbus_value }),

1743

dbus.Array())

909

dbus_value = transform_func(type_func(value),

910

variant_level

911

=variant_level)

912

self.PropertyChanged(dbus.String(dbus_name),

913

dbus_value)

1744

914

setattr(self, attrname, value)

1745

915

1746

916

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

1747

917

918

1748

919

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1749

920

approvals_pending = notifychangeproperty(dbus.Boolean,

1750

921

"ApprovalPending",

1752

923

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

1753

924

last_enabled = notifychangeproperty(datetime_to_dbus,

1754

925

"LastEnabled")

1755

checker = notifychangeproperty(

1756

dbus.Boolean, "CheckerRunning",

1757

type_func = lambda checker: checker is not None)

926

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

927

type_func = lambda checker:

928

checker is not None)

1758

929

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1759

930

"LastCheckedOK")

1760

last_checker_status = notifychangeproperty(dbus.Int16,

1761

"LastCheckerStatus")

1762

931

last_approval_request = notifychangeproperty(

1763

932

datetime_to_dbus, "LastApprovalRequest")

1764

933

approved_by_default = notifychangeproperty(dbus.Boolean,

1765

934

"ApprovedByDefault")

1766

approval_delay = notifychangeproperty(

1767

dbus.UInt64, "ApprovalDelay",

1768

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

935

approval_delay = notifychangeproperty(dbus.UInt16,

936

"ApprovalDelay",

937

type_func =

938

_timedelta_to_milliseconds)

1769

939

approval_duration = notifychangeproperty(

1770

dbus.UInt64, "ApprovalDuration",

1771

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

940

dbus.UInt16, "ApprovalDuration",

941

type_func = _timedelta_to_milliseconds)

1772

942

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

1773

timeout = notifychangeproperty(

1774

dbus.UInt64, "Timeout",

1775

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

943

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

944

type_func =

945

_timedelta_to_milliseconds)

1776

946

extended_timeout = notifychangeproperty(

1777

dbus.UInt64, "ExtendedTimeout",

1778

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

1779

interval = notifychangeproperty(

1780

dbus.UInt64, "Interval",

1781

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

947

dbus.UInt16, "ExtendedTimeout",

948

type_func = _timedelta_to_milliseconds)

949

interval = notifychangeproperty(dbus.UInt16,

950

"Interval",

951

type_func =

952

_timedelta_to_milliseconds)

1782

953

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

1783

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

1784

invalidate_only=True)

1785

954

1786

955

del notifychangeproperty

1787

956

1794

963

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

1795

964

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

1796

965

1797

def checker_callback(self, source, condition,

1798

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

1799

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

1800

connection, command, *args,

1801

**kwargs)

1802

exitstatus = self.last_checker_status

1803

if exitstatus >= 0:

966

def checker_callback(self, pid, condition, command,

967

*args, **kwargs):

968

self.checker_callback_tag = None

969

self.checker = None

970

if os.WIFEXITED(condition):

971

exitstatus = os.WEXITSTATUS(condition)

1804

972

# Emit D-Bus signal

1805

973

self.CheckerCompleted(dbus.Int16(exitstatus),

1806

# This is specific to GNU libC

1807

dbus.Int64(exitstatus << 8),

974

dbus.Int64(condition),

1808

975

dbus.String(command))

1809

976

else:

1810

977

# Emit D-Bus signal

1811

978

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

1812

dbus.Int64(

1813

# This is specific to GNU libC

1814

(exitstatus << 8)

1815

| self.last_checker_signal),

979

dbus.Int64(condition),

1816

980

dbus.String(command))

1817

return ret

981

982

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

983

*args, **kwargs)

1818

984

1819

985

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

1820

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

986

old_checker = self.checker

987

if self.checker is not None:

988

old_checker_pid = self.checker.pid

989

else:

990

old_checker_pid = None

1821

991

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

1822

992

# Only if new checker process was started

1823

993

if (self.checker is not None

1827

997

return r

1828

998

1829

999

def _reset_approved(self):

1830

self.approved = None

1000

self._approved = None

1831

1001

return False

1832

1002

1833

1003

def approve(self, value=True):

1834

self.approved = value

1835

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

1836

* 1000), self._reset_approved)

1837

1004

self.send_changedstate()

1005

self._approved = value

1006

gobject.timeout_add(_timedelta_to_milliseconds

1007

(self.approval_duration),

1008

self._reset_approved)

1009

1838

1010

1839

1011

## D-Bus methods, signals & properties

1840

1841

## Interfaces

1012

_interface = "se.recompile.Mandos.Client"

1842

1013

1843

1014

## Signals

1844

1015

1855

1026

pass

1856

1027

1857

1028

# PropertyChanged - signal

1858

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

1859

1029

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

1860

1030

def PropertyChanged(self, property, value):

1861

1031

"D-Bus signal"

1895

1065

self.checked_ok()

1896

1066

1897

1067

# Enable - method

1898

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

1899

1068

@dbus.service.method(_interface)

1900

1069

def Enable(self):

1901

1070

"D-Bus method"

1902

1071

self.enable()

1903

1072

1904

1073

# StartChecker - method

1905

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

1906

1074

@dbus.service.method(_interface)

1907

1075

def StartChecker(self):

1908

1076

"D-Bus method"

1909

1077

self.start_checker()

1910

1078

1911

1079

# Disable - method

1912

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

1913

1080

@dbus.service.method(_interface)

1914

1081

def Disable(self):

1915

1082

"D-Bus method"

1916

1083

self.disable()

1917

1084

1918

1085

# StopChecker - method

1919

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

1920

1086

@dbus.service.method(_interface)

1921

1087

def StopChecker(self):

1922

1088

self.stop_checker()

1929

1095

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

1930

1096

1931

1097

# ApprovedByDefault - property

1932

@dbus_service_property(_interface,

1933

signature="b",

1098

@dbus_service_property(_interface, signature="b",

1934

1099

access="readwrite")

1935

1100

def ApprovedByDefault_dbus_property(self, value=None):

1936

1101

if value is None: # get

1938

1103

self.approved_by_default = bool(value)

1939

1104

1940

1105

# ApprovalDelay - property

1941

@dbus_service_property(_interface,

1942

signature="t",

1106

@dbus_service_property(_interface, signature="t",

1943

1107

access="readwrite")

1944

1108

def ApprovalDelay_dbus_property(self, value=None):

1945

1109

if value is None: # get

1946

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

1947

* 1000)

1110

return dbus.UInt64(self.approval_delay_milliseconds())

1948

1111

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

1949

1112

1950

1113

# ApprovalDuration - property

1951

@dbus_service_property(_interface,

1952

signature="t",

1114

@dbus_service_property(_interface, signature="t",

1953

1115

access="readwrite")

1954

1116

def ApprovalDuration_dbus_property(self, value=None):

1955

1117

if value is None: # get

1956

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

1957

* 1000)

1118

return dbus.UInt64(_timedelta_to_milliseconds(

1119

self.approval_duration))

1958

1120

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

1959

1121

1960

1122

# Name - property

1961

@dbus_annotations(

1962

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

1963

1123

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

1964

1124

def Name_dbus_property(self):

1965

1125

return dbus.String(self.name)

1966

1126

1967

1127

# Fingerprint - property

1968

@dbus_annotations(

1969

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

1970

1128

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

1971

1129

def Fingerprint_dbus_property(self):

1972

1130

return dbus.String(self.fingerprint)

1973

1131

1974

1132

# Host - property

1975

@dbus_service_property(_interface,

1976

signature="s",

1133

@dbus_service_property(_interface, signature="s",

1977

1134

access="readwrite")

1978

1135

def Host_dbus_property(self, value=None):

1979

1136

if value is None: # get

1980

1137

return dbus.String(self.host)

1981

self.host = str(value)

1138

self.host = value

1982

1139

1983

1140

# Created - property

1984

@dbus_annotations(

1985

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

1986

1141

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

1987

1142

def Created_dbus_property(self):

1988

return datetime_to_dbus(self.created)

1143

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

1989

1144

1990

1145

# LastEnabled - property

1991

1146

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

1993

1148

return datetime_to_dbus(self.last_enabled)

1994

1149

1995

1150

# Enabled - property

1996

@dbus_service_property(_interface,

1997

signature="b",

1151

@dbus_service_property(_interface, signature="b",

1998

1152

access="readwrite")

1999

1153

def Enabled_dbus_property(self, value=None):

2000

1154

if value is None: # get

2005

1159

self.disable()

2006

1160

2007

1161

# LastCheckedOK - property

2008

@dbus_service_property(_interface,

2009

signature="s",

1162

@dbus_service_property(_interface, signature="s",

2010

1163

access="readwrite")

2011

1164

def LastCheckedOK_dbus_property(self, value=None):

2012

1165

if value is not None:

2014

1167

return

2015

1168

return datetime_to_dbus(self.last_checked_ok)

2016

1169

2017

# LastCheckerStatus - property

2018

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

2019

def LastCheckerStatus_dbus_property(self):

2020

return dbus.Int16(self.last_checker_status)

2021

2022

1170

# Expires - property

2023

1171

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

2024

1172

def Expires_dbus_property(self):

2030

1178

return datetime_to_dbus(self.last_approval_request)

2031

1179

2032

1180

# Timeout - property

2033

@dbus_service_property(_interface,

2034

signature="t",

1181

@dbus_service_property(_interface, signature="t",

2035

1182

access="readwrite")

2036

1183

def Timeout_dbus_property(self, value=None):

2037

1184

if value is None: # get

2038

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

2039

old_timeout = self.timeout

1185

return dbus.UInt64(self.timeout_milliseconds())

2040

1186

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

2041

# Reschedule disabling

2042

if self.enabled:

2043

now = datetime.datetime.utcnow()

2044

self.expires += self.timeout - old_timeout

2045

if self.expires <= now:

2046

# The timeout has passed

2047

self.disable()

2048

else:

2049

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

2050

is None):

2051

return

2052

GObject.source_remove(self.disable_initiator_tag)

2053

self.disable_initiator_tag = GObject.timeout_add(

2054

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

2055

self.disable)

1187

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

1188

return

1189

# Reschedule timeout

1190

gobject.source_remove(self.disable_initiator_tag)

1191

self.disable_initiator_tag = None

1192

self.expires = None

1193

time_to_die = _timedelta_to_milliseconds((self

1194

.last_checked_ok

1195

+ self.timeout)

1196

- datetime.datetime

1197

.utcnow())

1198

if time_to_die <= 0:

1199

# The timeout has passed

1200

self.disable()

1201

else:

1202

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

1203

+ datetime.timedelta(milliseconds =

1204

time_to_die))

1205

self.disable_initiator_tag = (gobject.timeout_add

1206

(time_to_die, self.disable))

2056

1207

2057

1208

# ExtendedTimeout - property

2058

@dbus_service_property(_interface,

2059

signature="t",

1209

@dbus_service_property(_interface, signature="t",

2060

1210

access="readwrite")

2061

1211

def ExtendedTimeout_dbus_property(self, value=None):

2062

1212

if value is None: # get

2063

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

2064

* 1000)

1213

return dbus.UInt64(self.extended_timeout_milliseconds())

2065

1214

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

2066

1215

2067

1216

# Interval - property

2068

@dbus_service_property(_interface,

2069

signature="t",

1217

@dbus_service_property(_interface, signature="t",

2070

1218

access="readwrite")

2071

1219

def Interval_dbus_property(self, value=None):

2072

1220

if value is None: # get

2073

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

1221

return dbus.UInt64(self.interval_milliseconds())

2074

1222

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

2075

1223

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

2076

1224

return

2077

if self.enabled:

2078

# Reschedule checker run

2079

GObject.source_remove(self.checker_initiator_tag)

2080

self.checker_initiator_tag = GObject.timeout_add(

2081

value, self.start_checker)

2082

self.start_checker() # Start one now, too

1225

# Reschedule checker run

1226

gobject.source_remove(self.checker_initiator_tag)

1227

self.checker_initiator_tag = (gobject.timeout_add

1228

(value, self.start_checker))

1229

self.start_checker() # Start one now, too

2083

1230

2084

1231

# Checker - property

2085

@dbus_service_property(_interface,

2086

signature="s",

1232

@dbus_service_property(_interface, signature="s",

2087

1233

access="readwrite")

2088

1234

def Checker_dbus_property(self, value=None):

2089

1235

if value is None: # get

2090

1236

return dbus.String(self.checker_command)

2091

self.checker_command = str(value)

1237

self.checker_command = value

2092

1238

2093

1239

# CheckerRunning - property

2094

@dbus_service_property(_interface,

2095

signature="b",

1240

@dbus_service_property(_interface, signature="b",

2096

1241

access="readwrite")

2097

1242

def CheckerRunning_dbus_property(self, value=None):

2098

1243

if value is None: # get

2103

1248

self.stop_checker()

2104

1249

2105

1250

# ObjectPath - property

2106

@dbus_annotations(

2107

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

2108

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

2109

1251

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

2110

1252

def ObjectPath_dbus_property(self):

2111

1253

return self.dbus_object_path # is already a dbus.ObjectPath

2112

1254

2113

1255

# Secret = property

2114

@dbus_annotations(

2115

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

2116

"invalidates"})

2117

@dbus_service_property(_interface,

2118

signature="ay",

2119

access="write",

2120

byte_arrays=True)

1256

@dbus_service_property(_interface, signature="ay",

1257

access="write", byte_arrays=True)

2121

1258

def Secret_dbus_property(self, value):

2122

self.secret = bytes(value)

1259

self.secret = str(value)

2123

1260

2124

1261

del _interface

2125

1262

2129

1266

self._pipe = child_pipe

2130

1267

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

2131

1268

if not self._pipe.recv():

2132

raise KeyError(fpr)

1269

raise KeyError()

2133

1270

2134

1271

def __getattribute__(self, name):

2135

if name == '_pipe':

1272

if(name == '_pipe'):

2136

1273

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

2137

1274

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

2138

1275

data = self._pipe.recv()

2139

1276

if data[0] == 'data':

2140

1277

return data[1]

2141

1278

if data[0] == 'function':

2142

2143

1279

def func(*args, **kwargs):

2144

1280

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

2145

1281

return self._pipe.recv()[1]

2146

2147

1282

return func

2148

1283

2149

1284

def __setattr__(self, name, value):

2150

if name == '_pipe':

1285

if(name == '_pipe'):

2151

1286

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

2152

1287

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

2153

1288

1289

class ClientDBusTransitional(ClientDBus):

1290

__metaclass__ = AlternateDBusNamesMetaclass

2154

1291

2155

1292

class ClientHandler(socketserver.BaseRequestHandler, object):

2156

1293

"""A class to handle client connections.

2161

1298

def handle(self):

2162

1299

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

2163

1300

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

2164

str(self.client_address))

1301

unicode(self.client_address))

2165

1302

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

2166

1303

self.server.child_pipe.fileno())

2167

1304

2168

session = gnutls.ClientSession(self.request)

1305

session = (gnutls.connection

1306

.ClientSession(self.request,

1307

gnutls.connection

1308

.X509Credentials()))

1309

1310

# Note: gnutls.connection.X509Credentials is really a

1311

# generic GnuTLS certificate credentials object so long as

1312

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

1313

# here despite using OpenPGP certificates.

2169

1314

2170

1315

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

2171

1316

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

2175

1320

priority = self.server.gnutls_priority

2176

1321

if priority is None:

2177

1322

priority = "NORMAL"

2178

gnutls.priority_set_direct(session._c_object, priority,

2179

None)

1323

(gnutls.library.functions

1324

.gnutls_priority_set_direct(session._c_object,

1325

priority, None))

2180

1326

2181

1327

# Start communication using the Mandos protocol

2182

1328

# Get protocol number

2184

1330

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

2185

1331

try:

2186

1332

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

2187

raise RuntimeError(line)

1333

raise RuntimeError

2188

1334

except (ValueError, IndexError, RuntimeError) as error:

2189

1335

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

2190

1336

return

2192

1338

# Start GnuTLS connection

2193

1339

try:

2194

1340

session.handshake()

2195

except gnutls.Error as error:

1341

except gnutls.errors.GNUTLSError as error:

2196

1342

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

2197

1343

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

2198

1344

# established. Just abandon the request.

2202

1348

approval_required = False

2203

1349

try:

2204

1350

try:

2205

fpr = self.fingerprint(

2206

self.peer_certificate(session))

2207

except (TypeError, gnutls.Error) as error:

1351

fpr = self.fingerprint(self.peer_certificate

1352

(session))

1353

except (TypeError,

1354

gnutls.errors.GNUTLSError) as error:

2208

1355

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

2209

1356

return

2210

1357

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

2223

1370

while True:

2224

1371

if not client.enabled:

2225

1372

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

2226

client.name)

1373

client.name)

2227

1374

if self.server.use_dbus:

2228

1375

# Emit D-Bus signal

2229

1376

client.Rejected("Disabled")

2230

1377

return

2231

1378

2232

if client.approved or not client.approval_delay:

1379

if client._approved or not client.approval_delay:

2233

1380

#We are approved or approval is disabled

2234

1381

break

2235

elif client.approved is None:

1382

elif client._approved is None:

2236

1383

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

2237

1384

client.name)

2238

1385

if self.server.use_dbus:

2239

1386

# Emit D-Bus signal

2240

1387

client.NeedApproval(

2241

client.approval_delay.total_seconds()

2242

* 1000, client.approved_by_default)

1388

client.approval_delay_milliseconds(),

1389

client.approved_by_default)

2243

1390

else:

2244

1391

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

2245

1392

client.name)

2251

1398

#wait until timeout or approved

2252

1399

time = datetime.datetime.now()

2253

1400

client.changedstate.acquire()

2254

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

1401

(client.changedstate.wait

1402

(float(client._timedelta_to_milliseconds(delay)

1403

/ 1000)))

2255

1404

client.changedstate.release()

2256

1405

time2 = datetime.datetime.now()

2257

1406

if (time2 - time) >= delay:

2268

1417

else:

2269

1418

delay -= time2 - time

2270

1419

2271

try:

2272

session.send(client.secret)

2273

except gnutls.Error as error:

2274

logger.warning("gnutls send failed",

2275

exc_info = error)

2276

return

1420

sent_size = 0

1421

while sent_size < len(client.secret):

1422

try:

1423

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

1424

except gnutls.errors.GNUTLSError as error:

1425

logger.warning("gnutls send failed")

1426

return

1427

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

1428

sent, len(client.secret)

1429

- (sent_size + sent))

1430

sent_size += sent

2277

1431

2278

1432

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

2279

1433

# bump the timeout using extended_timeout

2280

client.bump_timeout(client.extended_timeout)

1434

client.checked_ok(client.extended_timeout)

2281

1435

if self.server.use_dbus:

2282

1436

# Emit D-Bus signal

2283

1437

client.GotSecret()

2287

1441

client.approvals_pending -= 1

2288

1442

try:

2289

1443

session.bye()

2290

except gnutls.Error as error:

2291

logger.warning("GnuTLS bye failed",

2292

exc_info=error)

1444

except gnutls.errors.GNUTLSError as error:

1445

logger.warning("GnuTLS bye failed")

2293

1446

2294

1447

@staticmethod

2295

1448

def peer_certificate(session):

2296

1449

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

2297

1450

# If not an OpenPGP certificate...

2298

if (gnutls.certificate_type_get(session._c_object)

2299

!= gnutls.CRT_OPENPGP):

2300

# ...return invalid data

2301

return b""

1451

if (gnutls.library.functions

1452

.gnutls_certificate_type_get(session._c_object)

1453

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1454

# ...do the normal thing

1455

return session.peer_certificate

2302

1456

list_size = ctypes.c_uint(1)

2303

cert_list = (gnutls.certificate_get_peers

1457

cert_list = (gnutls.library.functions

1458

.gnutls_certificate_get_peers

2304

1459

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

2305

1460

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

2306

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

1461

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

1462

" certificate")

2307

1463

if list_size.value == 0:

2308

1464

return None

2309

1465

cert = cert_list[0]

2313

1469

def fingerprint(openpgp):

2314

1470

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2315

1471

# New GnuTLS "datum" with the OpenPGP public key

2316

datum = gnutls.datum_t(

2317

ctypes.cast(ctypes.c_char_p(openpgp),

2318

ctypes.POINTER(ctypes.c_ubyte)),

2319

ctypes.c_uint(len(openpgp)))

1472

datum = (gnutls.library.types

1473

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

1474

ctypes.POINTER

1475

(ctypes.c_ubyte)),

1476

ctypes.c_uint(len(openpgp))))

2320

1477

# New empty GnuTLS certificate

2321

crt = gnutls.openpgp_crt_t()

2322

gnutls.openpgp_crt_init(ctypes.byref(crt))

1478

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1479

(gnutls.library.functions

1480

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2323

1481

# Import the OpenPGP public key into the certificate

2324

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

2325

gnutls.OPENPGP_FMT_RAW)

1482

(gnutls.library.functions

1483

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

1484

gnutls.library.constants

1485

.GNUTLS_OPENPGP_FMT_RAW))

2326

1486

# Verify the self signature in the key

2327

1487

crtverify = ctypes.c_uint()

2328

gnutls.openpgp_crt_verify_self(crt, 0,

2329

ctypes.byref(crtverify))

1488

(gnutls.library.functions

1489

.gnutls_openpgp_crt_verify_self(crt, 0,

1490

ctypes.byref(crtverify)))

2330

1491

if crtverify.value != 0:

2331

gnutls.openpgp_crt_deinit(crt)

2332

raise gnutls.CertificateSecurityError("Verify failed")

1492

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1493

raise (gnutls.errors.CertificateSecurityError

1494

("Verify failed"))

2333

1495

# New buffer for the fingerprint

2334

1496

buf = ctypes.create_string_buffer(20)

2335

1497

buf_len = ctypes.c_size_t()

2336

1498

# Get the fingerprint from the certificate into the buffer

2337

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

2338

ctypes.byref(buf_len))

1499

(gnutls.library.functions

1500

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

1501

ctypes.byref(buf_len)))

2339

1502

# Deinit the certificate

2340

gnutls.openpgp_crt_deinit(crt)

1503

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2341

1504

# Convert the buffer to a Python bytestring

2342

1505

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

2343

1506

# Convert the bytestring to hexadecimal notation

2344

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

1507

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

2345

1508

return hex_fpr

2346

1509

2347

1510

2348

1511

class MultiprocessingMixIn(object):

2349

1512

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

2350

2351

1513

def sub_process_main(self, request, address):

2352

1514

try:

2353

1515

self.finish_request(request, address)

2354

except Exception:

1516

except:

2355

1517

self.handle_error(request, address)

2356

1518

self.close_request(request)

2357

1519

2358

1520

def process_request(self, request, address):

2359

1521

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

2360

1522

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

2361

args = (request, address))

1523

args = (request,

1524

address))

2362

1525

proc.start()

2363

1526

return proc

2364

1527

2365

1528

2366

1529

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2367

1530

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

2368

2369

1531

def process_request(self, request, client_address):

2370

1532

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

2371

1533

2380

1542

2381

1543

def add_pipe(self, parent_pipe, proc):

2382

1544

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

2383

raise NotImplementedError()

1545

raise NotImplementedError

2384

1546

2385

1547

2386

1548

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2392

1554

interface: None or a network interface name (string)

2393

1555

use_ipv6: Boolean; to use IPv6 or not

2394

1556

"""

2395

2396

1557

def __init__(self, server_address, RequestHandlerClass,

2397

interface=None,

2398

use_ipv6=True,

2399

socketfd=None):

2400

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

2401

creating a new one with socket.socket().

2402

"""

1558

interface=None, use_ipv6=True):

2403

1559

self.interface = interface

2404

1560

if use_ipv6:

2405

1561

self.address_family = socket.AF_INET6

2406

if socketfd is not None:

2407

# Save the file descriptor

2408

self.socketfd = socketfd

2409

# Save the original socket.socket() function

2410

self.socket_socket = socket.socket

2411

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

2412

#

2413

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

2414

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

2415

# patching socket.socket.)

2416

#

2417

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

2418

@functools.wraps(socket.socket)

2419

def socket_wrapper(*args, **kwargs):

2420

# Restore original function so subsequent calls are

2421

# not affected.

2422

socket.socket = self.socket_socket

2423

del self.socket_socket

2424

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

2425

# saved file descriptor.

2426

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

2427

# Replace socket.socket() function with wrapper

2428

socket.socket = socket_wrapper

2429

# The socketserver.TCPServer.__init__ will call

2430

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

2431

# socket_wrapper(), if socketfd was set.

2432

1562

socketserver.TCPServer.__init__(self, server_address,

2433

1563

RequestHandlerClass)

2434

2435

1564

def server_bind(self):

2436

1565

"""This overrides the normal server_bind() function

2437

1566

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

2443

1572

self.interface)

2444

1573

else:

2445

1574

try:

2446

self.socket.setsockopt(

2447

socket.SOL_SOCKET, SO_BINDTODEVICE,

2448

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

1575

self.socket.setsockopt(socket.SOL_SOCKET,

1576

SO_BINDTODEVICE,

1577

str(self.interface

1578

+ '\0'))

2449

1579

except socket.error as error:

2450

if error.errno == errno.EPERM:

2451

logger.error("No permission to bind to"

2452

" interface %s", self.interface)

2453

elif error.errno == errno.ENOPROTOOPT:

1580

if error[0] == errno.EPERM:

1581

logger.error("No permission to"

1582

" bind to interface %s",

1583

self.interface)

1584

elif error[0] == errno.ENOPROTOOPT:

2454

1585

logger.error("SO_BINDTODEVICE not available;"

2455

1586

" cannot bind to interface %s",

2456

1587

self.interface)

2457

elif error.errno == errno.ENODEV:

2458

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

2459

" cannot bind", self.interface)

2460

1588

else:

2461

1589

raise

2462

1590

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

2465

1593

if self.address_family == socket.AF_INET6:

2466

1594

any_address = "::" # in6addr_any

2467

1595

else:

2468

any_address = "0.0.0.0" # INADDR_ANY

1596

any_address = socket.INADDR_ANY

2469

1597

self.server_address = (any_address,

2470

1598

self.server_address[1])

2471

1599

elif not self.server_address[1]:

2472

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

1600

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

1601

0)

2473

1602

# if self.interface:

2474

1603

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

2475

1604

# 0, # port

2487

1616

gnutls_priority GnuTLS priority string

2488

1617

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

2489

1618

2490

Assumes a GObject.MainLoop event loop.

1619

Assumes a gobject.MainLoop event loop.

2491

1620

"""

2492

2493

1621

def __init__(self, server_address, RequestHandlerClass,

2494

interface=None,

2495

use_ipv6=True,

2496

clients=None,

2497

gnutls_priority=None,

2498

use_dbus=True,

2499

socketfd=None):

1622

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

1623

gnutls_priority=None, use_dbus=True):

2500

1624

self.enabled = False

2501

1625

self.clients = clients

2502

1626

if self.clients is None:

2503

self.clients = {}

1627

self.clients = set()

2504

1628

self.use_dbus = use_dbus

2505

1629

self.gnutls_priority = gnutls_priority

2506

1630

IPv6_TCPServer.__init__(self, server_address,

2507

1631

RequestHandlerClass,

2508

1632

interface = interface,

2509

use_ipv6 = use_ipv6,

2510

socketfd = socketfd)

2511

1633

use_ipv6 = use_ipv6)

2512

1634

def server_activate(self):

2513

1635

if self.enabled:

2514

1636

return socketserver.TCPServer.server_activate(self)

2518

1640

2519

1641

def add_pipe(self, parent_pipe, proc):

2520

1642

# Call "handle_ipc" for both data and EOF events

2521

GObject.io_add_watch(

2522

parent_pipe.fileno(),

2523

GObject.IO_IN | GObject.IO_HUP,

2524

functools.partial(self.handle_ipc,

2525

parent_pipe = parent_pipe,

2526

proc = proc))

1643

gobject.io_add_watch(parent_pipe.fileno(),

1644

gobject.IO_IN | gobject.IO_HUP,

1645

functools.partial(self.handle_ipc,

1646

parent_pipe =

1647

parent_pipe,

1648

proc = proc))

2527

1649

2528

def handle_ipc(self, source, condition,

2529

parent_pipe=None,

2530

proc = None,

2531

client_object=None):

1650

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

1651

proc = None, client_object=None):

1652

condition_names = {

1653

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

1654

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

1655

# blocking).

1656

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

1657

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

1658

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

1659

# broken, usually for pipes and

1660

# sockets).

1661

}

1662

conditions_string = ' | '.join(name

1663

for cond, name in

1664

condition_names.iteritems()

1665

if cond & condition)

2532

1666

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

2533

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

1667

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

2534

1668

# Wait for other process to exit

2535

1669

proc.join()

2536

1670

return False

2543

1677

fpr = request[1]

2544

1678

address = request[2]

2545

1679

2546

for c in self.clients.values():

1680

for c in self.clients:

2547

1681

if c.fingerprint == fpr:

2548

1682

client = c

2549

1683

break

2557

1691

parent_pipe.send(False)

2558

1692

return False

2559

1693

2560

GObject.io_add_watch(

2561

parent_pipe.fileno(),

2562

GObject.IO_IN | GObject.IO_HUP,

2563

functools.partial(self.handle_ipc,

2564

parent_pipe = parent_pipe,

2565

proc = proc,

2566

client_object = client))

1694

gobject.io_add_watch(parent_pipe.fileno(),

1695

gobject.IO_IN | gobject.IO_HUP,

1696

functools.partial(self.handle_ipc,

1697

parent_pipe =

1698

parent_pipe,

1699

proc = proc,

1700

client_object =

1701

client))

2567

1702

parent_pipe.send(True)

2568

1703

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

2569

1704

# same fileno

2575

1710

2576

1711

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

2577

1712

funcname)(*args,

2578

**kwargs)))

1713

**kwargs)))

2579

1714

2580

1715

if command == 'getattr':

2581

1716

attrname = request[1]

2582

if isinstance(client_object.__getattribute__(attrname),

2583

collections.Callable):

2584

parent_pipe.send(('function', ))

1717

if callable(client_object.__getattribute__(attrname)):

1718

parent_pipe.send(('function',))

2585

1719

else:

2586

parent_pipe.send((

2587

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

1720

parent_pipe.send(('data', client_object

1721

.__getattribute__(attrname)))

2588

1722

2589

1723

if command == 'setattr':

2590

1724

attrname = request[1]

2594

1728

return True

2595

1729

2596

1730

2597

def rfc3339_duration_to_delta(duration):

2598

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

2599

2600

>>> rfc3339_duration_to_delta("P7D")

2601

datetime.timedelta(7)

2602

>>> rfc3339_duration_to_delta("PT60S")

2603

datetime.timedelta(0, 60)

2604

>>> rfc3339_duration_to_delta("PT60M")

2605

datetime.timedelta(0, 3600)

2606

>>> rfc3339_duration_to_delta("PT24H")

2607

datetime.timedelta(1)

2608

>>> rfc3339_duration_to_delta("P1W")

2609

datetime.timedelta(7)

2610

>>> rfc3339_duration_to_delta("PT5M30S")

2611

datetime.timedelta(0, 330)

2612

>>> rfc3339_duration_to_delta("P1DT3M20S")

2613

datetime.timedelta(1, 200)

2614

"""

2615

2616

# Parsing an RFC 3339 duration with regular expressions is not

2617

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

2618

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

2619

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

2620

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

2621

# avoid excessive use of external libraries.

2622

2623

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

2624

Token = collections.namedtuple("Token", (

2625

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

2626

# a "group" containing digits

2627

"value", # datetime.timedelta or None

2628

"followers")) # Tokens valid after this token

2629

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

2630

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

2631

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

2632

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

2633

datetime.timedelta(seconds=1),

2634

frozenset((token_end, )))

2635

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

2636

datetime.timedelta(minutes=1),

2637

frozenset((token_second, token_end)))

2638

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

2639

datetime.timedelta(hours=1),

2640

frozenset((token_minute, token_end)))

2641

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

2642

None,

2643

frozenset((token_hour, token_minute,

2644

token_second)))

2645

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

2646

datetime.timedelta(days=1),

2647

frozenset((token_time, token_end)))

2648

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

2649

datetime.timedelta(weeks=4),

2650

frozenset((token_day, token_end)))

2651

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

2652

datetime.timedelta(weeks=52),

2653

frozenset((token_month, token_end)))

2654

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

2655

datetime.timedelta(weeks=1),

2656

frozenset((token_end, )))

2657

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

2658

frozenset((token_year, token_month,

2659

token_day, token_time,

2660

token_week)))

2661

# Define starting values

2662

value = datetime.timedelta() # Value so far

2663

found_token = None

2664

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

2665

s = duration # String left to parse

2666

# Loop until end token is found

2667

while found_token is not token_end:

2668

# Search for any currently valid tokens

2669

for token in followers:

2670

match = token.regexp.match(s)

2671

if match is not None:

2672

# Token found

2673

if token.value is not None:

2674

# Value found, parse digits

2675

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

2676

# Add to value so far

2677

value += factor * token.value

2678

# Strip token from string

2679

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

2680

# Go to found token

2681

found_token = token

2682

# Set valid next tokens

2683

followers = found_token.followers

2684

break

2685

else:

2686

# No currently valid tokens were found

2687

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

2688

.format(duration))

2689

# End token found

2690

return value

2691

2692

2693

1731

def string_to_delta(interval):

2694

1732

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

2695

1733

2706

1744

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

2707

1745

datetime.timedelta(0, 330)

2708

1746

"""

2709

2710

try:

2711

return rfc3339_duration_to_delta(interval)

2712

except ValueError:

2713

pass

2714

2715

1747

timevalue = datetime.timedelta(0)

2716

1748

for s in interval.split():

2717

1749

try:

2718

suffix = s[-1]

1750

suffix = unicode(s[-1])

2719

1751

value = int(s[:-1])

2720

1752

if suffix == "d":

2721

1753

delta = datetime.timedelta(value)

2728

1760

elif suffix == "w":

2729

1761

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

2730

1762

else:

2731

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

2732

except IndexError as e:

1763

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

1764

except (ValueError, IndexError) as e:

2733

1765

raise ValueError(*(e.args))

2734

1766

timevalue += delta

2735

1767

return timevalue

2736

1768

2737

1769

1770

def if_nametoindex(interface):

1771

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

1772

1773

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

1774

global if_nametoindex

1775

try:

1776

if_nametoindex = (ctypes.cdll.LoadLibrary

1777

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

1778

.if_nametoindex)

1779

except (OSError, AttributeError):

1780

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

1781

def if_nametoindex(interface):

1782

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

1783

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

1784

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

1785

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1786

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

1787

interface))

1788

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

1789

ifreq[16:20])[0]

1790

return interface_index

1791

return if_nametoindex(interface)

1792

1793

2738

1794

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

2739

1795

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

2740

1796

2748

1804

sys.exit()

2749

1805

if not noclose:

2750

1806

# Close all standard open file descriptors

2751

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

1807

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

2752

1808

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

2753

1809

raise OSError(errno.ENODEV,

2754

"{} not a character device"

2755

.format(os.devnull))

1810

"%s not a character device"

1811

% os.path.devnull)

2756

1812

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

2757

1813

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

2758

1814

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

2767

1823

2768

1824

parser = argparse.ArgumentParser()

2769

1825

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

2770

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

1826

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

2771

1827

help="show version number and exit")

2772

1828

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

2773

1829

help="Bind to interface IF")

2779

1835

help="Run self-test")

2780

1836

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

2781

1837

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

2782

" to terminal", default=None)

1838

" to terminal")

2783

1839

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

2784

1840

help="Debug level for stdout output")

2785

1841

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

2792

1848

" files")

2793

1849

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

2794

1850

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

2795

" system bus interface", default=None)

1851

" system bus interface")

2796

1852

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

2797

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

2798

default=None)

2799

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

2800

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

2801

" state", default=None)

2802

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

2803

help="Specify a file descriptor to a network"

2804

" socket to use instead of creating one")

2805

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

2806

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

2807

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

2808

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

2809

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

2810

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

2811

default=None)

2812

1853

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

2813

1854

options = parser.parse_args()

2814

1855

2815

1856

if options.check:

2816

1857

import doctest

2817

fail_count, test_count = doctest.testmod()

2818

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

1858

doctest.testmod()

1859

sys.exit()

2819

1860

2820

1861

# Default values for config file for server-global settings

2821

1862

server_defaults = { "interface": "",

2823

1864

"port": "",

2824

1865

"debug": "False",

2825

1866

"priority":

2826

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

2827

":+SIGN-DSA-SHA256",

1867

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

2828

1868

"servicename": "Mandos",

2829

1869

"use_dbus": "True",

2830

1870

"use_ipv6": "True",

2831

1871

"debuglevel": "",

2832

"restore": "True",

2833

"socket": "",

2834

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

2835

"foreground": "False",

2836

"zeroconf": "True",

2837

}

1872

}

2838

1873

2839

1874

# Parse config file for server-global settings

2840

1875

server_config = configparser.SafeConfigParser(server_defaults)

2841

1876

del server_defaults

2842

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

1877

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

1878

"mandos.conf"))

2843

1879

# Convert the SafeConfigParser object to a dict

2844

1880

server_settings = server_config.defaults()

2845

1881

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

2846

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

1882

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

2847

1883

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

2848

1884

option)

2849

1885

if server_settings["port"]:

2850

1886

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

2851

1887

"port")

2852

if server_settings["socket"]:

2853

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

2854

"socket")

2855

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

2856

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

2857

# happen with a supplied network socket.

2858

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

2859

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

2860

["socket"])

2861

1888

del server_config

2862

1889

2863

1890

# Override the settings from the config file with command line

2864

1891

# options, if set.

2865

1892

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

2866

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

2867

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

2868

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

1893

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

1894

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

2869

1895

value = getattr(options, option)

2870

1896

if value is not None:

2871

1897

server_settings[option] = value

2872

1898

del options

2873

1899

# Force all strings to be unicode

2874

1900

for option in server_settings.keys():

2875

if isinstance(server_settings[option], bytes):

2876

server_settings[option] = (server_settings[option]

2877

.decode("utf-8"))

2878

# Force all boolean options to be boolean

2879

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

2880

"foreground", "zeroconf"):

2881

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

2882

# Debug implies foreground

2883

if server_settings["debug"]:

2884

server_settings["foreground"] = True

1901

if type(server_settings[option]) is str:

1902

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

2885

1903

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

2886

1904

2887

1905

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

2888

1906

2889

if (not server_settings["zeroconf"]

2890

and not (server_settings["port"]

2891

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

2892

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

2893

2894

1907

# For convenience

2895

1908

debug = server_settings["debug"]

2896

1909

debuglevel = server_settings["debuglevel"]

2897

1910

use_dbus = server_settings["use_dbus"]

2898

1911

use_ipv6 = server_settings["use_ipv6"]

2899

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

2900

stored_state_file)

2901

foreground = server_settings["foreground"]

2902

zeroconf = server_settings["zeroconf"]

2903

2904

if debug:

2905

initlogger(debug, logging.DEBUG)

2906

else:

2907

if not debuglevel:

2908

initlogger(debug)

2909

else:

2910

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

2911

initlogger(debug, level)

2912

1912

2913

1913

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

2914

syslogger.setFormatter(

2915

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

2916

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

2917

server_settings["servicename"])))

1914

syslogger.setFormatter(logging.Formatter

1915

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

1916

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

1917

% server_settings["servicename"]))

2918

1918

2919

1919

# Parse config file with clients

2920

client_config = configparser.SafeConfigParser(Client

2921

.client_defaults)

1920

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

1921

"extended_timeout": "15m",

1922

"interval": "2m",

1923

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

1924

"host": "",

1925

"approval_delay": "0s",

1926

"approval_duration": "1s",

1927

}

1928

client_config = configparser.SafeConfigParser(client_defaults)

2922

1929

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

2923

1930

"clients.conf"))

2924

1931

2925

1932

global mandos_dbus_service

2926

1933

mandos_dbus_service = None

2927

1934

2928

socketfd = None

2929

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

2930

socketfd = server_settings["socket"]

2931

tcp_server = MandosServer(

2932

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

2933

ClientHandler,

2934

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

2935

use_ipv6=use_ipv6,

2936

gnutls_priority=server_settings["priority"],

2937

use_dbus=use_dbus,

2938

socketfd=socketfd)

2939

if not foreground:

2940

pidfilename = "/run/mandos.pid"

2941

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

2942

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

2943

pidfile = None

1935

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

1936

server_settings["port"]),

1937

ClientHandler,

1938

interface=(server_settings["interface"]

1939

or None),

1940

use_ipv6=use_ipv6,

1941

gnutls_priority=

1942

server_settings["priority"],

1943

use_dbus=use_dbus)

1944

if not debug:

1945

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

2944

1946

try:

2945

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

2946

except IOError as e:

2947

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

2948

exc_info=e)

1947

pidfile = open(pidfilename, "w")

1948

except IOError:

1949

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

2949

1950

2950

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

2951

("mandos", "mandos"),

2952

("nobody", "nogroup")):

1951

try:

1952

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

1953

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

1954

except KeyError:

2953

1955

try:

2954

uid = pwd.getpwnam(name).pw_uid

2955

gid = pwd.getpwnam(group).pw_gid

2956

break

1956

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

1957

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

2957

1958

except KeyError:

2958

continue

2959

else:

2960

uid = 65534

2961

gid = 65534

1959

try:

1960

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

1961

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

1962

except KeyError:

1963

uid = 65534

1964

gid = 65534

2962

1965

try:

2963

1966

os.setgid(gid)

2964

1967

os.setuid(uid)

2965

if debug:

2966

logger.debug("Did setuid/setgid to {}:{}".format(uid,

2967

gid))

2968

1968

except OSError as error:

2969

logger.warning("Failed to setuid/setgid to {}:{}: {}"

2970

.format(uid, gid, os.strerror(error.errno)))

2971

if error.errno != errno.EPERM:

2972

raise

1969

if error[0] != errno.EPERM:

1970

raise error

1971

1972

if not debug and not debuglevel:

1973

syslogger.setLevel(logging.WARNING)

1974

console.setLevel(logging.WARNING)

1975

if debuglevel:

1976

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

1977

syslogger.setLevel(level)

1978

console.setLevel(level)

2973

1979

2974

1980

if debug:

2975

1981

# Enable all possible GnuTLS debugging

2976

1982

2977

1983

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

2978

1984

# - GnuTLS manual

2979

gnutls.global_set_log_level(11)

1985

gnutls.library.functions.gnutls_global_set_log_level(11)

2980

1986

2981

@gnutls.log_func

1987

@gnutls.library.types.gnutls_log_func

2982

1988

def debug_gnutls(level, string):

2983

1989

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

2984

1990

2985

gnutls.global_set_log_function(debug_gnutls)

1991

(gnutls.library.functions

1992

.gnutls_global_set_log_function(debug_gnutls))

2986

1993

2987

1994

# Redirect stdin so all checkers get /dev/null

2988

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

1995

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

2989

1996

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

2990

1997

if null > 2:

2991

1998

os.close(null)

1999

else:

2000

# No console logging

2001

logger.removeHandler(console)

2992

2002

2993

2003

# Need to fork before connecting to D-Bus

2994

if not foreground:

2004

if not debug:

2995

2005

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

2996

2006

daemon()

2997

2007

2998

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

2999

# need to inform GObject that threads will be used.

3000

GObject.threads_init()

3001

3002

2008

global main_loop

3003

2009

# From the Avahi example code

3004

DBusGMainLoop(set_as_default=True)

3005

main_loop = GObject.MainLoop()

2010

DBusGMainLoop(set_as_default=True )

2011

main_loop = gobject.MainLoop()

3006

2012

bus = dbus.SystemBus()

3007

2013

# End of Avahi example code

3008

2014

if use_dbus:

3009

2015

try:

3010

2016

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

3011

bus,

3012

do_not_queue=True)

3013

old_bus_name = dbus.service.BusName(

3014

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

3015

do_not_queue=True)

3016

except dbus.exceptions.DBusException as e:

3017

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

2017

bus, do_not_queue=True)

2018

old_bus_name = (dbus.service.BusName

2019

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

2020

do_not_queue=True))

2021

except dbus.exceptions.NameExistsException as e:

2022

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

3018

2023

use_dbus = False

3019

2024

server_settings["use_dbus"] = False

3020

2025

tcp_server.use_dbus = False

3021

if zeroconf:

3022

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3023

service = AvahiServiceToSyslog(

3024

name = server_settings["servicename"],

3025

servicetype = "_mandos._tcp",

3026

protocol = protocol,

3027

bus = bus)

3028

if server_settings["interface"]:

3029

service.interface = if_nametoindex(

3030

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

2026

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2027

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

2028

servicetype = "_mandos._tcp",

2029

protocol = protocol, bus = bus)

2030

if server_settings["interface"]:

2031

service.interface = (if_nametoindex

2032

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

3031

2033

3032

2034

global multiprocessing_manager

3033

2035

multiprocessing_manager = multiprocessing.Manager()

3034

2036

3035

2037

client_class = Client

3036

2038

if use_dbus:

3037

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

3038

3039

client_settings = Client.config_parser(client_config)

3040

old_client_settings = {}

3041

clients_data = {}

3042

3043

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

3044

global wnull

3045

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

3046

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

3047

# mode

3048

if debug or not foreground:

3049

wnull.close()

3050

3051

# Get client data and settings from last running state.

3052

if server_settings["restore"]:

3053

try:

3054

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

3055

if sys.version_info.major == 2:

3056

clients_data, old_client_settings = pickle.load(

3057

stored_state)

3058

else:

3059

bytes_clients_data, bytes_old_client_settings = (

3060

pickle.load(stored_state, encoding = "bytes"))

3061

### Fix bytes to strings

3062

## clients_data

3063

# .keys()

3064

clients_data = { (key.decode("utf-8")

3065

if isinstance(key, bytes)

3066

else key): value

3067

for key, value in

3068

bytes_clients_data.items() }

3069

del bytes_clients_data

3070

for key in clients_data:

3071

value = { (k.decode("utf-8")

3072

if isinstance(k, bytes) else k): v

3073

for k, v in

3074

clients_data[key].items() }

3075

clients_data[key] = value

3076

# .client_structure

3077

value["client_structure"] = [

3078

(s.decode("utf-8")

3079

if isinstance(s, bytes)

3080

else s) for s in

3081

value["client_structure"] ]

3082

# .name & .host

3083

for k in ("name", "host"):

3084

if isinstance(value[k], bytes):

3085

value[k] = value[k].decode("utf-8")

3086

## old_client_settings

3087

# .keys()

3088

old_client_settings = {

3089

(key.decode("utf-8")

3090

if isinstance(key, bytes)

3091

else key): value

3092

for key, value in

3093

bytes_old_client_settings.items() }

3094

del bytes_old_client_settings

3095

# .host

3096

for value in old_client_settings.values():

3097

if isinstance(value["host"], bytes):

3098

value["host"] = (value["host"]

3099

.decode("utf-8"))

3100

os.remove(stored_state_path)

3101

except IOError as e:

3102

if e.errno == errno.ENOENT:

3103

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

3104

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

3105

else:

3106

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

3107

exc_info=e)

3108

raise

3109

except EOFError as e:

3110

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

3111

"EOFError:",

3112

exc_info=e)

3113

3114

with PGPEngine() as pgp:

3115

for client_name, client in clients_data.items():

3116

# Skip removed clients

3117

if client_name not in client_settings:

3118

continue

3119

3120

# Decide which value to use after restoring saved state.

3121

# We have three different values: Old config file,

3122

# new config file, and saved state.

3123

# New config value takes precedence if it differs from old

3124

# config value, otherwise use saved state.

3125

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

3126

try:

3127

# For each value in new config, check if it

3128

# differs from the old config value (Except for

3129

# the "secret" attribute)

3130

if (name != "secret"

3131

and (value !=

3132

old_client_settings[client_name][name])):

3133

client[name] = value

3134

except KeyError:

3135

pass

3136

3137

# Clients who has passed its expire date can still be

3138

# enabled if its last checker was successful. A Client

3139

# whose checker succeeded before we stored its state is

3140

# assumed to have successfully run all checkers during

3141

# downtime.

3142

if client["enabled"]:

3143

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

3144

if not client["last_checked_ok"]:

3145

logger.warning(

3146

"disabling client {} - Client never "

3147

"performed a successful checker".format(

3148

client_name))

3149

client["enabled"] = False

3150

elif client["last_checker_status"] != 0:

3151

logger.warning(

3152

"disabling client {} - Client last"

3153

" checker failed with error code"

3154

" {}".format(

3155

client_name,

3156

client["last_checker_status"]))

3157

client["enabled"] = False

3158

else:

3159

client["expires"] = (

3160

datetime.datetime.utcnow()

3161

+ client["timeout"])

3162

logger.debug("Last checker succeeded,"

3163

" keeping {} enabled".format(

3164

client_name))

2039

client_class = functools.partial(ClientDBusTransitional,

2040

bus = bus)

2041

def client_config_items(config, section):

2042

special_settings = {

2043

"approved_by_default":

2044

lambda: config.getboolean(section,

2045

"approved_by_default"),

2046

}

2047

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

3165

2048

try:

3166

client["secret"] = pgp.decrypt(

3167

client["encrypted_secret"],

3168

client_settings[client_name]["secret"])

3169

except PGPError:

3170

# If decryption fails, we use secret from new settings

3171

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

3172

client_name))

3173

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

3174

["secret"])

3175

3176

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

3177

for client_name in (set(old_client_settings)

3178

- set(client_settings)):

3179

del clients_data[client_name]

3180

for client_name in (set(client_settings)

3181

- set(old_client_settings)):

3182

clients_data[client_name] = client_settings[client_name]

3183

3184

# Create all client objects

3185

for client_name, client in clients_data.items():

3186

tcp_server.clients[client_name] = client_class(

3187

name = client_name,

3188

settings = client,

3189

server_settings = server_settings)

3190

2049

yield (name, special_settings[name]())

2050

except KeyError:

2051

yield (name, value)

2052

2053

tcp_server.clients.update(set(

2054

client_class(name = section,

2055

config= dict(client_config_items(

2056

client_config, section)))

2057

for section in client_config.sections()))

3191

2058

if not tcp_server.clients:

3192

2059

logger.warning("No clients defined")

3193

3194

if not foreground:

3195

if pidfile is not None:

3196

pid = os.getpid()

3197

try:

3198

with pidfile:

3199

print(pid, file=pidfile)

3200

except IOError:

3201

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

3202

pidfilename, pid)

3203

del pidfile

2060

2061

if not debug:

2062

try:

2063

with pidfile:

2064

pid = os.getpid()

2065

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

2066

del pidfile

2067

except IOError:

2068

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

2069

pidfilename, pid)

2070

except NameError:

2071

# "pidfile" was never created

2072

pass

3204

2073

del pidfilename

2074

2075

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

3205

2076

3206

2077

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

3207

2078

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

3208

2079

3209

2080

if use_dbus:

3210

3211

@alternate_dbus_interfaces(

3212

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

3213

class MandosDBusService(DBusObjectWithObjectManager):

2081

class MandosDBusService(dbus.service.Object):

3214

2082

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

3215

3216

2083

def __init__(self):

3217

2084

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

3218

3219

2085

_interface = "se.recompile.Mandos"

3220

2086

3221

2087

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

3228

2094

"D-Bus signal"

3229

2095

pass

3230

2096

3231

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

3232

"true"})

3233

2097

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

3234

2098

def ClientRemoved(self, objpath, name):

3235

2099

"D-Bus signal"

3236

2100

pass

3237

2101

3238

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

3239

"true"})

3240

2102

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

3241

2103

def GetAllClients(self):

3242

2104

"D-Bus method"

3243

return dbus.Array(c.dbus_object_path for c in

3244

tcp_server.clients.values())

2105

return dbus.Array(c.dbus_object_path

2106

for c in tcp_server.clients)

3245

2107

3246

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

3247

"true"})

3248

2108

@dbus.service.method(_interface,

3249

2109

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

3250

2110

def GetAllClientsWithProperties(self):

3251

2111

"D-Bus method"

3252

2112

return dbus.Dictionary(

3253

{ c.dbus_object_path: c.GetAll(

3254

"se.recompile.Mandos.Client")

3255

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

2113

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

2114

for c in tcp_server.clients),

3256

2115

signature="oa{sv}")

3257

2116

3258

2117

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

3259

2118

def RemoveClient(self, object_path):

3260

2119

"D-Bus method"

3261

for c in tcp_server.clients.values():

2120

for c in tcp_server.clients:

3262

2121

if c.dbus_object_path == object_path:

3263

del tcp_server.clients[c.name]

2122

tcp_server.clients.remove(c)

3264

2123

c.remove_from_connection()

3265

# Don't signal the disabling

2124

# Don't signal anything except ClientRemoved

3266

2125

c.disable(quiet=True)

3267

# Emit D-Bus signal for removal

3268

self.client_removed_signal(c)

2126

# Emit D-Bus signal

2127

self.ClientRemoved(object_path, c.name)

3269

2128

return

3270

2129

raise KeyError(object_path)

3271

2130

3272

2131

del _interface

3273

3274

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3275

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

3276

def GetManagedObjects(self):

3277

"""D-Bus method"""

3278

return dbus.Dictionary(

3279

{ client.dbus_object_path:

3280

dbus.Dictionary(

3281

{ interface: client.GetAll(interface)

3282

for interface in

3283

client._get_all_interface_names()})

3284

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

3285

3286

def client_added_signal(self, client):

3287

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

3288

if use_dbus:

3289

# New standard signal

3290

self.InterfacesAdded(

3291

client.dbus_object_path,

3292

dbus.Dictionary(

3293

{ interface: client.GetAll(interface)

3294

for interface in

3295

client._get_all_interface_names()}))

3296

# Old signal

3297

self.ClientAdded(client.dbus_object_path)

3298

3299

def client_removed_signal(self, client):

3300

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

3301

if use_dbus:

3302

# New standard signal

3303

self.InterfacesRemoved(

3304

client.dbus_object_path,

3305

client._get_all_interface_names())

3306

# Old signal

3307

self.ClientRemoved(client.dbus_object_path,

3308

client.name)

3309

2132

3310

mandos_dbus_service = MandosDBusService()

2133

class MandosDBusServiceTransitional(MandosDBusService):

2134

__metaclass__ = AlternateDBusNamesMetaclass

2135

mandos_dbus_service = MandosDBusServiceTransitional()

3311

2136

3312

2137

def cleanup():

3313

2138

"Cleanup function; run on exit"

3314

if zeroconf:

3315

service.cleanup()

2139

service.cleanup()

3316

2140

3317

2141

multiprocessing.active_children()

3318

wnull.close()

3319

if not (tcp_server.clients or client_settings):

3320

return

3321

3322

# Store client before exiting. Secrets are encrypted with key

3323

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

3324

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

3325

clients = {}

3326

with PGPEngine() as pgp:

3327

for client in tcp_server.clients.values():

3328

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

3329

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

3330

key)

3331

client_dict = {}

3332

3333

# A list of attributes that can not be pickled

3334

# + secret.

3335

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

3336

"checker", "server_settings" }

3337

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

3338

.Object):

3339

exclude.add(name)

3340

3341

client_dict["encrypted_secret"] = (client

3342

.encrypted_secret)

3343

for attr in client.client_structure:

3344

if attr not in exclude:

3345

client_dict[attr] = getattr(client, attr)

3346

3347

clients[client.name] = client_dict

3348

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

3349

3350

try:

3351

with tempfile.NamedTemporaryFile(

3352

mode='wb',

3353

suffix=".pickle",

3354

prefix='clients-',

3355

dir=os.path.dirname(stored_state_path),

3356

delete=False) as stored_state:

3357

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

3358

protocol = 2)

3359

tempname = stored_state.name

3360

os.rename(tempname, stored_state_path)

3361

except (IOError, OSError) as e:

3362

if not debug:

3363

try:

3364

os.remove(tempname)

3365

except NameError:

3366

pass

3367

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

3368

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

3369

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

3370

else:

3371

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

3372

exc_info=e)

3373

raise

3374

3375

# Delete all clients, and settings from config

3376

2142

while tcp_server.clients:

3377

name, client = tcp_server.clients.popitem()

2143

client = tcp_server.clients.pop()

3378

2144

if use_dbus:

3379

2145

client.remove_from_connection()

3380

# Don't signal the disabling

2146

client.disable_hook = None

2147

# Don't signal anything except ClientRemoved

3381

2148

client.disable(quiet=True)

3382

# Emit D-Bus signal for removal

3383

2149

if use_dbus:

3384

mandos_dbus_service.client_removed_signal(client)

3385

client_settings.clear()

2150

# Emit D-Bus signal

2151

mandos_dbus_service.ClientRemoved(client

2152

.dbus_object_path,

2153

client.name)

3386

2154

3387

2155

atexit.register(cleanup)

3388

2156

3389

for client in tcp_server.clients.values():

2157

for client in tcp_server.clients:

3390

2158

if use_dbus:

3391

# Emit D-Bus signal for adding

3392

mandos_dbus_service.client_added_signal(client)

3393

# Need to initiate checking of clients

3394

if client.enabled:

3395

client.init_checker()

2159

# Emit D-Bus signal

2160

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2161

client.enable()

3396

2162

3397

2163

tcp_server.enable()

3398

2164

tcp_server.server_activate()

3399

2165

3400

2166

# Find out what port we got

3401

if zeroconf:

3402

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

2167

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

3403

2168

if use_ipv6:

3404

2169

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

3405

" flowinfo %d, scope_id %d",

3406

*tcp_server.socket.getsockname())

2170

" flowinfo %d, scope_id %d"

2171

% tcp_server.socket.getsockname())

3407

2172

else: # IPv4

3408

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

3409

*tcp_server.socket.getsockname())

2173

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

2174

% tcp_server.socket.getsockname())

3410

2175

3411

2176

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

3412

2177

3413

2178

try:

3414

if zeroconf:

3415

# From the Avahi example code

3416

try:

3417

service.activate()

3418

except dbus.exceptions.DBusException as error:

3419

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

3420

cleanup()

3421

sys.exit(1)

3422

# End of Avahi example code

2179

# From the Avahi example code

2180

try:

2181

service.activate()

2182

except dbus.exceptions.DBusException as error:

2183

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

2184

cleanup()

2185

sys.exit(1)

2186

# End of Avahi example code

3423

2187

3424

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

2188

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

3425

2189

lambda *args, **kwargs:

3426

2190

(tcp_server.handle_request

3427

2191

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

3429

2193

logger.debug("Starting main loop")

3430

2194

main_loop.run()

3431

2195

except AvahiError as error:

3432

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

2196

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

3433

2197

cleanup()

3434

2198

sys.exit(1)

3435

2199

except KeyboardInterrupt: