/mandos/trunk : revision 505.3.10

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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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from gi.repository import GLib

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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 = "1.7.7"

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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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# Only GPG version 1 has the --no-use-agent option.

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if self.gpg == "gpg" or self.gpg.endswith("/gpg"):

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self.gnupgargs.append("--no-use-agent")

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def __enter__(self):

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return self

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def __exit__(self, exc_type, exc_value, traceback):

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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for root, dirs, files in os.walk(self.tempdir,

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topdown = False):

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for filename in files:

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os.remove(os.path.join(root, filename))

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for dirname in dirs:

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os.rmdir(os.path.join(root, dirname))

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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# Passphrase can not be empty and can not contain newlines or

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# NUL bytes. So we prefix it and hex encode it.

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encoded = b"mandos" + binascii.hexlify(password)

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if len(encoded) > 2048:

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# GnuPG can't handle long passwords, so encode differently

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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

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.replace(b"\n", b"\\n")

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.replace(b"\0", b"\\x00"))

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen([self.gpg, '--symmetric',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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ciphertext, err = proc.communicate(input = data)

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen([self.gpg, '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input = data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# 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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class AvahiError(Exception):

284

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

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self.value = value

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

287

**kwargs)

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

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

156

def rename(self):

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

347

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if self.rename_count >= self.max_renames:

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

349

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" after %i retries, exiting.",

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self.rename_count)

351

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raise AvahiServiceError("Too many renames")

352

self.name = str(

353

self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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166

self.name)

357

if remove:

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self.remove()

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

171

self.remove()

359

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try:

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173

self.add()

361

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except dbus.exceptions.DBusException as error:

362

if (error.get_dbus_name()

363

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

364

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

365

return self.rename(remove=False)

366

else:

367

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

368

self.cleanup()

369

os._exit(1)

370

175

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

176

self.cleanup()

177

os._exit(1)

178

self.rename_count += 1

371

179

def remove(self):

372

180

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

373

181

if self.entry_group_state_changed_match is not None:

375

183

self.entry_group_state_changed_match = None

376

184

if self.group is not None:

377

185

self.group.Reset()

378

379

186

def add(self):

380

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

381

188

self.remove()

386

193

avahi.DBUS_INTERFACE_ENTRY_GROUP)

387

194

self.entry_group_state_changed_match = (

388

195

self.group.connect_to_signal(

389

'StateChanged', self.entry_group_state_changed))

196

'StateChanged', self .entry_group_state_changed))

390

197

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

391

198

self.name, self.type)

392

199

self.group.AddService(

398

205

dbus.UInt16(self.port),

399

206

avahi.string_array_to_txt_array(self.TXT))

400

207

self.group.Commit()

401

402

208

def entry_group_state_changed(self, state, error):

403

209

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

404

210

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

410

216

self.rename()

411

217

elif state == avahi.ENTRY_GROUP_FAILURE:

412

218

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

413

str(error))

414

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

415

219

unicode(error))

220

raise AvahiGroupError("State changed: %s"

221

% unicode(error))

416

222

def cleanup(self):

417

223

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

418

224

if self.group is not None:

419

225

try:

420

226

self.group.Free()

421

227

except (dbus.exceptions.UnknownMethodException,

422

dbus.exceptions.DBusException):

228

dbus.exceptions.DBusException) as e:

423

229

pass

424

230

self.group = None

425

231

self.remove()

426

427

232

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

428

233

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

429

234

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

430

bad_states = {

431

avahi.SERVER_INVALID: "Zeroconf server invalid",

432

avahi.SERVER_REGISTERING: None,

433

avahi.SERVER_COLLISION: "Zeroconf server name collision",

434

avahi.SERVER_FAILURE: "Zeroconf server failure",

435

}

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" }

436

242

if state in bad_states:

437

243

if bad_states[state] is not None:

438

244

if error is None:

441

247

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

442

248

self.cleanup()

443

249

elif state == avahi.SERVER_RUNNING:

444

try:

445

self.add()

446

except dbus.exceptions.DBusException as error:

447

if (error.get_dbus_name()

448

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

449

logger.info("Local Zeroconf service name"

450

" collision.")

451

return self.rename(remove=False)

452

else:

453

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

454

self.cleanup()

455

os._exit(1)

250

self.add()

456

251

else:

457

252

if error is None:

458

253

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

459

254

else:

460

255

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

461

462

256

def activate(self):

463

257

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

464

258

if self.server is None:

468

262

follow_name_owner_changes=True),

469

263

avahi.DBUS_INTERFACE_SERVER)

470

264

self.server.connect_to_signal("StateChanged",

471

self.server_state_changed)

265

self.server_state_changed)

472

266

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

473

267

474

268

475

class AvahiServiceToSyslog(AvahiService):

476

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

477

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

478

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

479

syslogger.setFormatter(logging.Formatter(

480

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

481

.format(self.name)))

482

return ret

483

484

# Pretend that we have a GnuTLS module

485

class GnuTLS(object):

486

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

487

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

488

489

_library = ctypes.cdll.LoadLibrary(

490

ctypes.util.find_library("gnutls"))

491

_need_version = b"3.3.0"

492

def __init__(self):

493

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

494

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

495

# happens.

496

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

497

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

498

.format(self._need_version))

499

500

# Unless otherwise indicated, the constants and types below are

501

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

502

503

# Constants

504

E_SUCCESS = 0

505

E_INTERRUPTED = -52

506

E_AGAIN = -28

507

CRT_OPENPGP = 2

508

CLIENT = 2

509

SHUT_RDWR = 0

510

CRD_CERTIFICATE = 1

511

E_NO_CERTIFICATE_FOUND = -49

512

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

513

514

# Types

515

class session_int(ctypes.Structure):

516

_fields_ = []

517

session_t = ctypes.POINTER(session_int)

518

class certificate_credentials_st(ctypes.Structure):

519

_fields_ = []

520

certificate_credentials_t = ctypes.POINTER(

521

certificate_credentials_st)

522

certificate_type_t = ctypes.c_int

523

class datum_t(ctypes.Structure):

524

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

525

('size', ctypes.c_uint)]

526

class openpgp_crt_int(ctypes.Structure):

527

_fields_ = []

528

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

529

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

530

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

531

credentials_type_t = ctypes.c_int

532

transport_ptr_t = ctypes.c_void_p

533

close_request_t = ctypes.c_int

534

535

# Exceptions

536

class Error(Exception):

537

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

538

# exception might be raised from within GnuTLS.__init__,

539

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

540

# global variable has happened.

541

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

542

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

543

# code is passed, convert it to a string with

544

# gnutls.strerror()

545

self.code = code

546

if message is None and code is not None:

547

message = GnuTLS.strerror(code)

548

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

549

message, *args)

550

551

class CertificateSecurityError(Error):

552

pass

553

554

# Classes

555

class Credentials(object):

556

def __init__(self):

557

self._c_object = gnutls.certificate_credentials_t()

558

gnutls.certificate_allocate_credentials(

559

ctypes.byref(self._c_object))

560

self.type = gnutls.CRD_CERTIFICATE

561

562

def __del__(self):

563

gnutls.certificate_free_credentials(self._c_object)

564

565

class ClientSession(object):

566

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

567

self._c_object = gnutls.session_t()

568

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

569

gnutls.set_default_priority(self._c_object)

570

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

571

gnutls.handshake_set_private_extensions(self._c_object,

572

True)

573

self.socket = socket

574

if credentials is None:

575

credentials = gnutls.Credentials()

576

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

577

ctypes.cast(credentials._c_object,

578

ctypes.c_void_p))

579

self.credentials = credentials

580

581

def __del__(self):

582

gnutls.deinit(self._c_object)

583

584

def handshake(self):

585

return gnutls.handshake(self._c_object)

586

587

def send(self, data):

588

data = bytes(data)

589

data_len = len(data)

590

while data_len > 0:

591

data_len -= gnutls.record_send(self._c_object,

592

data[-data_len:],

593

data_len)

594

595

def bye(self):

596

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

597

598

# Error handling functions

599

def _error_code(result):

600

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

601

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

602

if result >= 0:

603

return result

604

if result == gnutls.E_NO_CERTIFICATE_FOUND:

605

raise gnutls.CertificateSecurityError(code = result)

606

raise gnutls.Error(code = result)

607

608

def _retry_on_error(result, func, arguments):

609

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

610

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

611

while result < 0:

612

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

613

return _error_code(result)

614

result = func(*arguments)

615

return result

616

617

# Unless otherwise indicated, the function declarations below are

618

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

619

620

# Functions

621

priority_set_direct = _library.gnutls_priority_set_direct

622

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

623

ctypes.POINTER(ctypes.c_char_p)]

624

priority_set_direct.restype = _error_code

625

626

init = _library.gnutls_init

627

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

628

init.restype = _error_code

629

630

set_default_priority = _library.gnutls_set_default_priority

631

set_default_priority.argtypes = [session_t]

632

set_default_priority.restype = _error_code

633

634

record_send = _library.gnutls_record_send

635

record_send.argtypes = [session_t, ctypes.c_void_p,

636

ctypes.c_size_t]

637

record_send.restype = ctypes.c_ssize_t

638

record_send.errcheck = _retry_on_error

639

640

certificate_allocate_credentials = (

641

_library.gnutls_certificate_allocate_credentials)

642

certificate_allocate_credentials.argtypes = [

643

ctypes.POINTER(certificate_credentials_t)]

644

certificate_allocate_credentials.restype = _error_code

645

646

certificate_free_credentials = (

647

_library.gnutls_certificate_free_credentials)

648

certificate_free_credentials.argtypes = [certificate_credentials_t]

649

certificate_free_credentials.restype = None

650

651

handshake_set_private_extensions = (

652

_library.gnutls_handshake_set_private_extensions)

653

handshake_set_private_extensions.argtypes = [session_t,

654

ctypes.c_int]

655

handshake_set_private_extensions.restype = None

656

657

credentials_set = _library.gnutls_credentials_set

658

credentials_set.argtypes = [session_t, credentials_type_t,

659

ctypes.c_void_p]

660

credentials_set.restype = _error_code

661

662

strerror = _library.gnutls_strerror

663

strerror.argtypes = [ctypes.c_int]

664

strerror.restype = ctypes.c_char_p

665

666

certificate_type_get = _library.gnutls_certificate_type_get

667

certificate_type_get.argtypes = [session_t]

668

certificate_type_get.restype = _error_code

669

670

certificate_get_peers = _library.gnutls_certificate_get_peers

671

certificate_get_peers.argtypes = [session_t,

672

ctypes.POINTER(ctypes.c_uint)]

673

certificate_get_peers.restype = ctypes.POINTER(datum_t)

674

675

global_set_log_level = _library.gnutls_global_set_log_level

676

global_set_log_level.argtypes = [ctypes.c_int]

677

global_set_log_level.restype = None

678

679

global_set_log_function = _library.gnutls_global_set_log_function

680

global_set_log_function.argtypes = [log_func]

681

global_set_log_function.restype = None

682

683

deinit = _library.gnutls_deinit

684

deinit.argtypes = [session_t]

685

deinit.restype = None

686

687

handshake = _library.gnutls_handshake

688

handshake.argtypes = [session_t]

689

handshake.restype = _error_code

690

handshake.errcheck = _retry_on_error

691

692

transport_set_ptr = _library.gnutls_transport_set_ptr

693

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

694

transport_set_ptr.restype = None

695

696

bye = _library.gnutls_bye

697

bye.argtypes = [session_t, close_request_t]

698

bye.restype = _error_code

699

bye.errcheck = _retry_on_error

700

701

check_version = _library.gnutls_check_version

702

check_version.argtypes = [ctypes.c_char_p]

703

check_version.restype = ctypes.c_char_p

704

705

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

706

707

openpgp_crt_init = _library.gnutls_openpgp_crt_init

708

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

709

openpgp_crt_init.restype = _error_code

710

711

openpgp_crt_import = _library.gnutls_openpgp_crt_import

712

openpgp_crt_import.argtypes = [openpgp_crt_t,

713

ctypes.POINTER(datum_t),

714

openpgp_crt_fmt_t]

715

openpgp_crt_import.restype = _error_code

716

717

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

718

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

719

ctypes.POINTER(ctypes.c_uint)]

720

openpgp_crt_verify_self.restype = _error_code

721

722

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

723

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

724

openpgp_crt_deinit.restype = None

725

726

openpgp_crt_get_fingerprint = (

727

_library.gnutls_openpgp_crt_get_fingerprint)

728

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

729

ctypes.c_void_p,

730

ctypes.POINTER(

731

ctypes.c_size_t)]

732

openpgp_crt_get_fingerprint.restype = _error_code

733

734

# Remove non-public functions

735

del _error_code, _retry_on_error

736

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

737

gnutls = GnuTLS()

738

739

def call_pipe(connection, # : multiprocessing.Connection

740

func, *args, **kwargs):

741

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

742

743

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

744

return value on the provided multiprocessing.Connection.

745

"""

746

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

747

connection.close()

748

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

749

275

class Client(object):

750

276

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

751

277

752

278

Attributes:

753

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

279

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

754

280

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

755

281

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

756

282

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

757

283

to see if the client lives.

758

284

'None' if no process is running.

759

checker_callback_tag: a GLib event source tag, or None

285

checker_callback_tag: a gobject event source tag, or None

760

286

checker_command: string; External command which is run to check

761

287

if client lives. %() expansions are done at

762

288

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

763

289

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

764

checker_initiator_tag: a GLib event source tag, or None

290

checker_initiator_tag: a gobject event source tag, or None

765

291

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

766

client_structure: Object describing what attributes a client has

767

and is used for storing the client at exit

768

292

current_checker_command: string; current running checker_command

769

disable_initiator_tag: a GLib 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

770

295

enabled: bool()

771

296

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

772

297

uniquely identify the client

774

299

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

775

300

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

776

301

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

777

last_checker_status: integer between 0 and 255 reflecting exit

778

status of last checker. -1 reflects crashed

779

checker, -2 means no checker completed yet.

780

last_checker_signal: The signal which killed the last checker, if

781

last_checker_status is -1

782

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

302

last_enabled: datetime.datetime(); (UTC)

783

303

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

784

304

D-Bus identifiers

785

305

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

786

306

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

787

307

until this client is disabled

788

extended_timeout: extra long timeout when secret has been sent

308

extended_timeout: extra long timeout when password has been sent

789

309

runtime_expansions: Allowed attributes for runtime expansion.

790

310

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

791

311

disabled, or None

792

server_settings: The server_settings dict from main()

793

312

"""

794

313

795

314

runtime_expansions = ("approval_delay", "approval_duration",

796

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

797

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

798

"last_approval_request", "last_checked_ok",

315

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

316

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

799

317

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

800

client_defaults = {

801

"timeout": "PT5M",

802

"extended_timeout": "PT15M",

803

"interval": "PT2M",

804

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

805

"host": "",

806

"approval_delay": "PT0S",

807

"approval_duration": "PT1S",

808

"approved_by_default": "True",

809

"enabled": "True",

810

}

811

812

@staticmethod

813

def config_parser(config):

814

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

815

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

816

with exceptions for any special settings as defined above.

817

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

818

value given the same arguments.

819

"""

820

settings = {}

821

for client_name in config.sections():

822

section = dict(config.items(client_name))

823

client = settings[client_name] = {}

824

825

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

826

# Reformat values from string types to Python types

827

client["approved_by_default"] = config.getboolean(

828

client_name, "approved_by_default")

829

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

830

"enabled")

831

832

# Uppercase and remove spaces from fingerprint for later

833

# comparison purposes with return value from the

834

# fingerprint() function

835

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

836

.replace(" ", ""))

837

if "secret" in section:

838

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

839

.encode("utf-8"),

840

"base64")

841

elif "secfile" in section:

842

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

843

(section["secfile"])),

844

"rb") as secfile:

845

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

846

else:

847

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

848

.format(section))

849

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

850

client["extended_timeout"] = string_to_delta(

851

section["extended_timeout"])

852

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

853

client["approval_delay"] = string_to_delta(

854

section["approval_delay"])

855

client["approval_duration"] = string_to_delta(

856

section["approval_duration"])

857

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

858

client["last_approval_request"] = None

859

client["last_checked_ok"] = None

860

client["last_checker_status"] = -2

861

862

return settings

863

864

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."""

865

338

self.name = name

866

if server_settings is None:

867

server_settings = {}

868

self.server_settings = server_settings

869

# adding all client settings

870

for setting, value in settings.items():

871

setattr(self, setting, value)

872

873

if self.enabled:

874

if not hasattr(self, "last_enabled"):

875

self.last_enabled = datetime.datetime.utcnow()

876

if not hasattr(self, "expires"):

877

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

878

+ self.timeout)

879

else:

880

self.last_enabled = None

881

self.expires = None

882

339

if config is None:

340

config = {}

883

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(" ", ""))

884

347

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

885

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

886

datetime.datetime.utcnow())

887

888

# 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

889

369

self.checker = None

890

370

self.checker_initiator_tag = None

891

371

self.disable_initiator_tag = None

372

self.expires = None

892

373

self.checker_callback_tag = None

374

self.checker_command = config["checker"]

893

375

self.current_checker_command = None

894

self.approved = None

376

self.last_connect = None

377

self._approved = None

378

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

379

True)

895

380

self.approvals_pending = 0

896

self.changedstate = multiprocessing_manager.Condition(

897

multiprocessing_manager.Lock())

898

self.client_structure = [attr

899

for attr in self.__dict__.keys()

900

if not attr.startswith("_")]

901

self.client_structure.append("client_structure")

902

903

for name, t in inspect.getmembers(

904

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

905

if not name.startswith("_"):

906

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()))

907

388

908

# Send notice to process children that client state has changed

909

389

def send_changedstate(self):

910

with self.changedstate:

911

self.changedstate.notify_all()

390

self.changedstate.acquire()

391

self.changedstate.notify_all()

392

self.changedstate.release()

912

393

913

394

def enable(self):

914

395

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

915

396

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

916

397

# Already enabled

917

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

918

406

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

407

self.disable_initiator_tag = (gobject.timeout_add

408

(self.timeout_milliseconds(),

409

self.disable))

919

410

self.enabled = True

920

411

self.last_enabled = datetime.datetime.utcnow()

921

self.init_checker()

922

self.send_changedstate()

412

# Also start a new checker *right now*.

413

self.start_checker()

923

414

924

415

def disable(self, quiet=True):

925

416

"""Disable this client."""

926

417

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

927

418

return False

928

419

if not quiet:

420

self.send_changedstate()

421

if not quiet:

929

422

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

930

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

931

GLib.source_remove(self.disable_initiator_tag)

423

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

424

gobject.source_remove(self.disable_initiator_tag)

932

425

self.disable_initiator_tag = None

933

426

self.expires = None

934

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

935

GLib.source_remove(self.checker_initiator_tag)

427

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

428

gobject.source_remove(self.checker_initiator_tag)

936

429

self.checker_initiator_tag = None

937

430

self.stop_checker()

431

if self.disable_hook:

432

self.disable_hook(self)

938

433

self.enabled = False

939

if not quiet:

940

self.send_changedstate()

941

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

434

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

942

435

return False

943

436

944

437

def __del__(self):

438

self.disable_hook = None

945

439

self.disable()

946

440

947

def init_checker(self):

948

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

949

# and every interval from then on.

950

if self.checker_initiator_tag is not None:

951

GLib.source_remove(self.checker_initiator_tag)

952

self.checker_initiator_tag = GLib.timeout_add(

953

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

954

self.start_checker)

955

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

956

if self.disable_initiator_tag is not None:

957

GLib.source_remove(self.disable_initiator_tag)

958

self.disable_initiator_tag = GLib.timeout_add(

959

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

960

# Also start a new checker *right now*.

961

self.start_checker()

962

963

def checker_callback(self, source, condition, connection,

964

command):

441

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

965

442

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

966

443

self.checker_callback_tag = None

967

444

self.checker = None

968

# Read return code from connection (see call_pipe)

969

returncode = connection.recv()

970

connection.close()

971

972

if returncode >= 0:

973

self.last_checker_status = returncode

974

self.last_checker_signal = None

975

if self.last_checker_status == 0:

445

if os.WIFEXITED(condition):

446

exitstatus = os.WEXITSTATUS(condition)

447

if exitstatus == 0:

976

448

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

977

449

vars(self))

978

450

self.checked_ok()

979

451

else:

980

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

452

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

453

vars(self))

981

454

else:

982

self.last_checker_status = -1

983

self.last_checker_signal = -returncode

984

455

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

985

456

vars(self))

986

return False

987

988

def checked_ok(self):

989

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

990

self.last_checked_ok = datetime.datetime.utcnow()

991

self.last_checker_status = 0

992

self.last_checker_signal = None

993

self.bump_timeout()

994

995

def bump_timeout(self, timeout=None):

996

"""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

"""

997

464

if timeout is None:

998

465

timeout = self.timeout

466

self.last_checked_ok = datetime.datetime.utcnow()

999

467

if self.disable_initiator_tag is not None:

1000

GLib.source_remove(self.disable_initiator_tag)

1001

self.disable_initiator_tag = None

468

gobject.source_remove(self.disable_initiator_tag)

1002

469

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

1003

self.disable_initiator_tag = GLib.timeout_add(

1004

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

470

self.disable_initiator_tag = (gobject.timeout_add

471

(_timedelta_to_milliseconds

472

(timeout), self.disable))

1005

473

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

1006

474

1007

475

def need_approval(self):

1013

481

If a checker already exists, leave it running and do

1014

482

nothing."""

1015

483

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

1016

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

1017

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

1018

# would inevitably timeout, since no checker would get a

1019

# 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

1020

488

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

1021

489

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

1022

490

# should be.

1023

491

1024

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

1025

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

1026

self.checker.join()

1027

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)

1028

505

# Start a new checker if needed

1029

506

if self.checker is None:

1030

# Escape attributes for the shell

1031

escaped_attrs = {

1032

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

1033

for attr in self.runtime_expansions }

1034

507

try:

1035

command = self.checker_command % escaped_attrs

1036

except TypeError as error:

1037

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

1038

self.checker_command,

1039

exc_info=error)

1040

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

1041

526

self.current_checker_command = command

1042

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

1043

self.name)

1044

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

1045

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

1046

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

1047

# always replaced by /dev/null.)

1048

# The exception is when not debugging but nevertheless

1049

# running in the foreground; use the previously

1050

# created wnull.

1051

popen_args = { "close_fds": True,

1052

"shell": True,

1053

"cwd": "/" }

1054

if (not self.server_settings["debug"]

1055

and self.server_settings["foreground"]):

1056

popen_args.update({"stdout": wnull,

1057

"stderr": wnull })

1058

pipe = multiprocessing.Pipe(duplex = False)

1059

self.checker = multiprocessing.Process(

1060

target = call_pipe,

1061

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

1062

kwargs = popen_args)

1063

self.checker.start()

1064

self.checker_callback_tag = GLib.io_add_watch(

1065

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

1066

self.checker_callback, pipe[0], command)

1067

# Re-run this periodically if run by GLib.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

1068

551

return True

1069

552

1070

553

def stop_checker(self):

1071

554

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

1072

555

if self.checker_callback_tag:

1073

GLib.source_remove(self.checker_callback_tag)

556

gobject.source_remove(self.checker_callback_tag)

1074

557

self.checker_callback_tag = None

1075

558

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

1076

559

return

1077

560

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

1078

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

1079

569

self.checker = None

1080

570

1081

571

1082

def dbus_service_property(dbus_interface,

1083

signature="v",

1084

access="readwrite",

1085

byte_arrays=False):

572

def dbus_service_property(dbus_interface, signature="v",

573

access="readwrite", byte_arrays=False):

1086

574

"""Decorators for marking methods of a DBusObjectWithProperties to

1087

575

become properties on the D-Bus.

1088

576

1097

585

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

1098

586

if byte_arrays and signature != "ay":

1099

587

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

1100

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

1101

588

" signature %r" % signature)

1102

589

def decorator(func):

1103

590

func._dbus_is_property = True

1104

591

func._dbus_interface = dbus_interface

1109

596

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

1110

597

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1111

598

return func

1112

1113

return decorator

1114

1115

1116

def dbus_interface_annotations(dbus_interface):

1117

"""Decorator for marking functions returning interface annotations

1118

1119

Usage:

1120

1121

@dbus_interface_annotations("org.example.Interface")

1122

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

1123

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

1124

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

1125

"false"}

1126

"""

1127

1128

def decorator(func):

1129

func._dbus_is_interface = True

1130

func._dbus_interface = dbus_interface

1131

func._dbus_name = dbus_interface

1132

return func

1133

1134

return decorator

1135

1136

1137

def dbus_annotations(annotations):

1138

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

1139

Usage:

1140

1141

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

1142

"org.freedesktop.DBus.Property."

1143

"EmitsChangedSignal": "false"})

1144

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

1145

access="r")

1146

def Property_dbus_property(self):

1147

return dbus.Boolean(False)

1148

1149

See also the DBusObjectWithAnnotations class.

1150

"""

1151

1152

def decorator(func):

1153

func._dbus_annotations = annotations

1154

return func

1155

1156

599

return decorator

1157

600

1158

601

1159

602

class DBusPropertyException(dbus.exceptions.DBusException):

1160

603

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

1161

604

"""

1162

pass

605

def __unicode__(self):

606

return unicode(str(self))

1163

607

1164

608

1165

609

class DBusPropertyAccessException(DBusPropertyException):

1174

618

pass

1175

619

1176

620

1177

class DBusObjectWithAnnotations(dbus.service.Object):

1178

"""A D-Bus object with annotations.

1179

1180

Classes inheriting from this can use the dbus_annotations

1181

decorator to add annotations to methods or signals.

1182

"""

1183

1184

@staticmethod

1185

def _is_dbus_thing(thing):

1186

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

1187

1188

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

1189

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

1190

"""

1191

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

1192

False)

1193

1194

def _get_all_dbus_things(self, thing):

1195

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

1196

"""

1197

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

1198

athing.__get__(self))

1199

for cls in self.__class__.__mro__

1200

for name, athing in

1201

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

1202

1203

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1204

out_signature = "s",

1205

path_keyword = 'object_path',

1206

connection_keyword = 'connection')

1207

def Introspect(self, object_path, connection):

1208

"""Overloading of standard D-Bus method.

1209

1210

Inserts annotation tags on methods and signals.

1211

"""

1212

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

1213

connection)

1214

try:

1215

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

1216

1217

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

1218

# Add annotation tags

1219

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

1220

for tag in if_tag.getElementsByTagName(typ):

1221

annots = dict()

1222

for name, prop in (self.

1223

_get_all_dbus_things(typ)):

1224

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

1225

and prop._dbus_interface

1226

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

1227

annots.update(getattr(

1228

prop, "_dbus_annotations", {}))

1229

for name, value in annots.items():

1230

ann_tag = document.createElement(

1231

"annotation")

1232

ann_tag.setAttribute("name", name)

1233

ann_tag.setAttribute("value", value)

1234

tag.appendChild(ann_tag)

1235

# Add interface annotation tags

1236

for annotation, value in dict(

1237

itertools.chain.from_iterable(

1238

annotations().items()

1239

for name, annotations

1240

in self._get_all_dbus_things("interface")

1241

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

1242

)).items():

1243

ann_tag = document.createElement("annotation")

1244

ann_tag.setAttribute("name", annotation)

1245

ann_tag.setAttribute("value", value)

1246

if_tag.appendChild(ann_tag)

1247

# Fix argument name for the Introspect method itself

1248

if (if_tag.getAttribute("name")

1249

== dbus.INTROSPECTABLE_IFACE):

1250

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

1251

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

1252

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

1253

if (arg.getAttribute("direction")

1254

== "out"):

1255

arg.setAttribute("name",

1256

"xml_data")

1257

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

1258

document.unlink()

1259

except (AttributeError, xml.dom.DOMException,

1260

xml.parsers.expat.ExpatError) as error:

1261

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

1262

exc_info=error)

1263

return xmlstring

1264

1265

1266

class DBusObjectWithProperties(DBusObjectWithAnnotations):

621

class DBusObjectWithProperties(dbus.service.Object):

1267

622

"""A D-Bus object with properties.

1268

623

1269

624

Classes inheriting from this can use the dbus_service_property

1271

626

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

1272

627

"""

1273

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

1274

641

def _get_dbus_property(self, interface_name, property_name):

1275

642

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

1276

643

property with the specified name and interface.

1277

644

"""

1278

for cls in self.__class__.__mro__:

1279

for name, value in inspect.getmembers(

1280

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)):

1281

648

if (value._dbus_name == property_name

1282

649

and value._dbus_interface == interface_name):

1283

650

return value.__get__(self)

1284

651

1285

652

# No such property

1286

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

1287

self.dbus_object_path, interface_name, property_name))

1288

1289

@classmethod

1290

def _get_all_interface_names(cls):

1291

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

1292

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

1293

"_dbus_interface", None)

1294

for x in (inspect.getmro(cls))

1295

for attr in dir(x))

1296

if name is not None)

1297

1298

@dbus.service.method(dbus.PROPERTIES_IFACE,

1299

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",

1300

658

out_signature="v")

1301

659

def Get(self, interface_name, property_name):

1302

660

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

1320

678

# The byte_arrays option is not supported yet on

1321

679

# signatures other than "ay".

1322

680

if prop._dbus_signature != "ay":

1323

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

1324

"'ay' signature {!r}"

1325

.format(prop._dbus_signature))

1326

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

1327

for byte in value))

681

raise ValueError

682

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

683

for byte in value))

1328

684

prop(value)

1329

685

1330

@dbus.service.method(dbus.PROPERTIES_IFACE,

1331

in_signature="s",

686

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

1332

687

out_signature="a{sv}")

1333

688

def GetAll(self, interface_name):

1334

689

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

1336

691

1337

692

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

1338

693

"""

1339

properties = {}

1340

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

694

all = {}

695

for name, prop in self._get_all_dbus_properties():

1341

696

if (interface_name

1342

697

and interface_name != prop._dbus_interface):

1343

698

# Interface non-empty but did not match

1347

702

continue

1348

703

value = prop()

1349

704

if not hasattr(value, "variant_level"):

1350

properties[name] = value

705

all[name] = value

1351

706

continue

1352

properties[name] = type(value)(

1353

value, variant_level = value.variant_level + 1)

1354

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

1355

1356

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

1357

def PropertiesChanged(self, interface_name, changed_properties,

1358

invalidated_properties):

1359

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

1360

standard.

1361

"""

1362

pass

707

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

708

value.variant_level+1)

709

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

1363

710

1364

711

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1365

712

out_signature="s",

1366

713

path_keyword='object_path',

1367

714

connection_keyword='connection')

1368

715

def Introspect(self, object_path, connection):

1369

"""Overloading of standard D-Bus method.

1370

1371

Inserts property tags and interface annotation tags.

716

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

1372

717

"""

1373

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1374

object_path,

1375

connection)

718

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

719

connection)

1376

720

try:

1377

721

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

1378

1379

722

def make_tag(document, name, prop):

1380

723

e = document.createElement("property")

1381

724

e.setAttribute("name", name)

1382

725

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

1383

726

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

1384

727

return e

1385

1386

728

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

1387

# Add property tags

1388

729

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

1389

730

for name, prop

1390

in self._get_all_dbus_things("property")

731

in self._get_all_dbus_properties()

1391

732

if prop._dbus_interface

1392

733

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

1393

734

if_tag.appendChild(tag)

1394

# Add annotation tags for properties

1395

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

1396

annots = dict()

1397

for name, prop in self._get_all_dbus_things(

1398

"property"):

1399

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

1400

and prop._dbus_interface

1401

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

1402

annots.update(getattr(

1403

prop, "_dbus_annotations", {}))

1404

for name, value in annots.items():

1405

ann_tag = document.createElement(

1406

"annotation")

1407

ann_tag.setAttribute("name", name)

1408

ann_tag.setAttribute("value", value)

1409

tag.appendChild(ann_tag)

1410

735

# Add the names to the return values for the

1411

736

# "org.freedesktop.DBus.Properties" methods

1412

737

if (if_tag.getAttribute("name")

1427

752

except (AttributeError, xml.dom.DOMException,

1428

753

xml.parsers.expat.ExpatError) as error:

1429

754

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

1430

exc_info=error)

1431

return xmlstring

1432

1433

try:

1434

dbus.OBJECT_MANAGER_IFACE

1435

except AttributeError:

1436

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

1437

1438

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1439

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

1440

1441

Classes inheriting from this exposes the standard

1442

GetManagedObjects call and the InterfacesAdded and

1443

InterfacesRemoved signals on the standard

1444

"org.freedesktop.DBus.ObjectManager" interface.

1445

1446

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

1447

manually.

1448

"""

1449

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1450

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

1451

def GetManagedObjects(self):

1452

"""This function must be overridden"""

1453

raise NotImplementedError()

1454

1455

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1456

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

1457

def InterfacesAdded(self, object_path, interfaces_and_properties):

1458

pass

1459

1460

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

1461

def InterfacesRemoved(self, object_path, interfaces):

1462

pass

1463

1464

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1465

out_signature = "s",

1466

path_keyword = 'object_path',

1467

connection_keyword = 'connection')

1468

def Introspect(self, object_path, connection):

1469

"""Overloading of standard D-Bus method.

1470

1471

Override return argument name of GetManagedObjects to be

1472

"objpath_interfaces_and_properties"

1473

"""

1474

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1475

object_path,

1476

connection)

1477

try:

1478

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

1479

1480

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

1481

# Fix argument name for the GetManagedObjects method

1482

if (if_tag.getAttribute("name")

1483

== dbus.OBJECT_MANAGER_IFACE):

1484

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

1485

if (cn.getAttribute("name")

1486

== "GetManagedObjects"):

1487

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

1488

if (arg.getAttribute("direction")

1489

== "out"):

1490

arg.setAttribute(

1491

"name",

1492

"objpath_interfaces"

1493

"_and_properties")

1494

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

1495

document.unlink()

1496

except (AttributeError, xml.dom.DOMException,

1497

xml.parsers.expat.ExpatError) as error:

1498

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

1499

exc_info = error)

1500

return xmlstring

1501

1502

def datetime_to_dbus(dt, variant_level=0):

755

error)

756

return xmlstring

757

758

759

def datetime_to_dbus (dt, variant_level=0):

1503

760

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

1504

761

if dt is None:

1505

762

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

1506

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

1507

1508

1509

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1510

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

1511

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

1512

interface names according to the "alt_interface_names" mapping.

1513

Usage:

1514

1515

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

1516

"net.example.AlternateInterface"})

1517

class SampleDBusObject(dbus.service.Object):

1518

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

1519

def SampleDBusMethod():

1520

pass

1521

1522

The above "SampleDBusMethod" on "SampleDBusObject" will be

1523

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

1524

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

1525

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

1526

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

1527

1528

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

1529

(from DBusObjectWithProperties) and interfaces (from the

1530

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.

1531

770

"""

1532

1533

def wrapper(cls):

1534

for orig_interface_name, alt_interface_name in (

1535

alt_interface_names.items()):

1536

attr = {}

1537

interface_names = set()

1538

# Go though all attributes of the class

1539

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):

1540

778

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

1541

779

# with the wrong interface name

1542

780

if (not hasattr(attribute, "_dbus_interface")

1543

or not attribute._dbus_interface.startswith(

1544

orig_interface_name)):

781

or not attribute._dbus_interface

782

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

1545

783

continue

1546

784

# Create an alternate D-Bus interface name based on

1547

785

# the current name

1548

alt_interface = attribute._dbus_interface.replace(

1549

orig_interface_name, alt_interface_name)

1550

interface_names.add(alt_interface)

786

alt_interface = (attribute._dbus_interface

787

.replace("se.recompile.Mandos",

788

"se.bsnet.fukt.Mandos"))

1551

789

# Is this a D-Bus signal?

1552

790

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

1553

# Extract the original non-method undecorated

1554

# function by black magic

1555

if sys.version_info.major == 2:

1556

nonmethod_func = (dict(

791

# Extract the original non-method function by

792

# black magic

793

nonmethod_func = (dict(

1557

794

zip(attribute.func_code.co_freevars,

1558

attribute.__closure__))

1559

["func"].cell_contents)

1560

else:

1561

nonmethod_func = (dict(

1562

zip(attribute.__code__.co_freevars,

1563

attribute.__closure__))

1564

["func"].cell_contents)

795

attribute.__closure__))["func"]

796

.cell_contents)

1565

797

# Create a new, but exactly alike, function

1566

798

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

1567

799

# with the alternate D-Bus interface name

1568

new_function = copy_function(nonmethod_func)

1569

new_function = (dbus.service.signal(

1570

alt_interface,

1571

attribute._dbus_signature)(new_function))

1572

# Copy annotations, if any

1573

try:

1574

new_function._dbus_annotations = dict(

1575

attribute._dbus_annotations)

1576

except AttributeError:

1577

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)))

1578

809

# Define a creator of a function to call both the

1579

# original and alternate functions, so both the

1580

# original and alternate signals gets sent when

1581

# the function is called

810

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

811

# signals gets sent when the function is called

1582

812

def fixscope(func1, func2):

1583

813

"""This function is a scope container to pass

1584

814

func1 and func2 to the "call_both" function

1585

815

outside of its arguments"""

1586

1587

@functools.wraps(func2)

1588

816

def call_both(*args, **kwargs):

1589

817

"""This function will emit two D-Bus

1590

818

signals by calling func1 and func2"""

1591

819

func1(*args, **kwargs)

1592

820

func2(*args, **kwargs)

1593

# Make wrapper function look like a D-Bus signal

1594

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

1595

if name.startswith("_dbus_"):

1596

setattr(call_both, name, attr)

1597

1598

821

return call_both

1599

822

# Create the "call_both" function and add it to

1600

823

# the class

1601

attr[attrname] = fixscope(attribute, new_function)

824

attr[attrname] = fixscope(attribute,

825

new_function)

1602

826

# Is this a D-Bus method?

1603

827

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

1604

828

# Create a new, but exactly alike, function

1605

829

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

1606

830

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

1607

831

# to the class.

1608

attr[attrname] = (

1609

dbus.service.method(

1610

alt_interface,

1611

attribute._dbus_in_signature,

1612

attribute._dbus_out_signature)

1613

(copy_function(attribute)))

1614

# Copy annotations, if any

1615

try:

1616

attr[attrname]._dbus_annotations = dict(

1617

attribute._dbus_annotations)

1618

except AttributeError:

1619

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)))

1620

842

# Is this a D-Bus property?

1621

843

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

1622

844

# Create a new, but exactly alike, function

1623

845

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

1624

846

# property with the alternate D-Bus interface

1625

847

# name. Add it to the class.

1626

attr[attrname] = (dbus_service_property(

1627

alt_interface, attribute._dbus_signature,

1628

attribute._dbus_access,

1629

attribute._dbus_get_args_options

1630

["byte_arrays"])

1631

(copy_function(attribute)))

1632

# Copy annotations, if any

1633

try:

1634

attr[attrname]._dbus_annotations = dict(

1635

attribute._dbus_annotations)

1636

except AttributeError:

1637

pass

1638

# Is this a D-Bus interface?

1639

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

1640

# Create a new, but exactly alike, function

1641

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

1642

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

1643

# to the class.

1644

attr[attrname] = (

1645

dbus_interface_annotations(alt_interface)

1646

(copy_function(attribute)))

1647

if deprecate:

1648

# Deprecate all alternate interfaces

1649

iname="_AlternateDBusNames_interface_annotation{}"

1650

for interface_name in interface_names:

1651

1652

@dbus_interface_annotations(interface_name)

1653

def func(self):

1654

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

1655

"true" }

1656

# Find an unused name

1657

for aname in (iname.format(i)

1658

for i in itertools.count()):

1659

if aname not in attr:

1660

attr[aname] = func

1661

break

1662

if interface_names:

1663

# Replace the class with a new subclass of it with

1664

# methods, signals, etc. as created above.

1665

if sys.version_info.major == 2:

1666

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

1667

(cls, ), attr)

1668

else:

1669

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

1670

(cls, ), attr)

1671

return cls

1672

1673

return wrapper

1674

1675

1676

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

1677

"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

1678

863

class ClientDBus(Client, DBusObjectWithProperties):

1679

864

"""A Client class using D-Bus

1680

865

1684

869

"""

1685

870

1686

871

runtime_expansions = (Client.runtime_expansions

1687

+ ("dbus_object_path", ))

1688

1689

_interface = "se.recompile.Mandos.Client"

872

+ ("dbus_object_path",))

1690

873

1691

874

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

1692

875

1693

876

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

877

self._approvals_pending = 0

1694

878

self.bus = bus

1695

879

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

1696

880

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

1697

881

# the D-Bus

1698

client_object_name = str(self.name).translate(

882

client_object_name = unicode(self.name).translate(

1699

883

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

1700

884

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

1701

self.dbus_object_path = dbus.ObjectPath(

1702

"/clients/" + client_object_name)

885

self.dbus_object_path = (dbus.ObjectPath

886

("/clients/" + client_object_name))

1703

887

DBusObjectWithProperties.__init__(self, self.bus,

1704

888

self.dbus_object_path)

1705

1706

def notifychangeproperty(transform_func, dbus_name,

1707

type_func=lambda x: x,

1708

variant_level=1,

1709

invalidate_only=False,

1710

_interface=_interface):

889

890

def notifychangeproperty(transform_func,

891

dbus_name, type_func=lambda x: x,

892

variant_level=1):

1711

893

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

1712

894

its changes to DBus.

1713

895

1714

896

transform_fun: Function that takes a value and a variant_level

1715

897

and transforms it to a D-Bus type.

1716

898

dbus_name: D-Bus name of the variable

1718

900

to the D-Bus. Default: no transform

1719

901

variant_level: D-Bus variant level. Default: 1

1720

902

"""

1721

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

1722

903

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

1723

904

def setter(self, value):

1724

905

if hasattr(self, "dbus_object_path"):

1725

906

if (not hasattr(self, attrname) or

1726

907

type_func(getattr(self, attrname, None))

1727

908

!= type_func(value)):

1728

if invalidate_only:

1729

self.PropertiesChanged(

1730

_interface, dbus.Dictionary(),

1731

dbus.Array((dbus_name, )))

1732

else:

1733

dbus_value = transform_func(

1734

type_func(value),

1735

variant_level = variant_level)

1736

self.PropertyChanged(dbus.String(dbus_name),

1737

dbus_value)

1738

self.PropertiesChanged(

1739

_interface,

1740

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

1741

dbus_value }),

1742

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)

1743

914

setattr(self, attrname, value)

1744

915

1745

916

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

1746

917

918

1747

919

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1748

920

approvals_pending = notifychangeproperty(dbus.Boolean,

1749

921

"ApprovalPending",

1751

923

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

1752

924

last_enabled = notifychangeproperty(datetime_to_dbus,

1753

925

"LastEnabled")

1754

checker = notifychangeproperty(

1755

dbus.Boolean, "CheckerRunning",

1756

type_func = lambda checker: checker is not None)

926

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

927

type_func = lambda checker:

928

checker is not None)

1757

929

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1758

930

"LastCheckedOK")

1759

last_checker_status = notifychangeproperty(dbus.Int16,

1760

"LastCheckerStatus")

1761

931

last_approval_request = notifychangeproperty(

1762

932

datetime_to_dbus, "LastApprovalRequest")

1763

933

approved_by_default = notifychangeproperty(dbus.Boolean,

1764

934

"ApprovedByDefault")

1765

approval_delay = notifychangeproperty(

1766

dbus.UInt64, "ApprovalDelay",

1767

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

935

approval_delay = notifychangeproperty(dbus.UInt16,

936

"ApprovalDelay",

937

type_func =

938

_timedelta_to_milliseconds)

1768

939

approval_duration = notifychangeproperty(

1769

dbus.UInt64, "ApprovalDuration",

1770

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

940

dbus.UInt16, "ApprovalDuration",

941

type_func = _timedelta_to_milliseconds)

1771

942

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

1772

timeout = notifychangeproperty(

1773

dbus.UInt64, "Timeout",

1774

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

943

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

944

type_func =

945

_timedelta_to_milliseconds)

1775

946

extended_timeout = notifychangeproperty(

1776

dbus.UInt64, "ExtendedTimeout",

1777

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

1778

interval = notifychangeproperty(

1779

dbus.UInt64, "Interval",

1780

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)

1781

953

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

1782

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

1783

invalidate_only=True)

1784

954

1785

955

del notifychangeproperty

1786

956

1793

963

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

1794

964

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

1795

965

1796

def checker_callback(self, source, condition,

1797

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

1798

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

1799

connection, command, *args,

1800

**kwargs)

1801

exitstatus = self.last_checker_status

1802

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)

1803

972

# Emit D-Bus signal

1804

973

self.CheckerCompleted(dbus.Int16(exitstatus),

1805

# This is specific to GNU libC

1806

dbus.Int64(exitstatus << 8),

974

dbus.Int64(condition),

1807

975

dbus.String(command))

1808

976

else:

1809

977

# Emit D-Bus signal

1810

978

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

1811

dbus.Int64(

1812

# This is specific to GNU libC

1813

(exitstatus << 8)

1814

| self.last_checker_signal),

979

dbus.Int64(condition),

1815

980

dbus.String(command))

1816

return ret

981

982

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

983

*args, **kwargs)

1817

984

1818

985

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

1819

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

1820

991

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

1821

992

# Only if new checker process was started

1822

993

if (self.checker is not None

1826

997

return r

1827

998

1828

999

def _reset_approved(self):

1829

self.approved = None

1000

self._approved = None

1830

1001

return False

1831

1002

1832

1003

def approve(self, value=True):

1833

self.approved = value

1834

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

1835

* 1000), self._reset_approved)

1836

1004

self.send_changedstate()

1005

self._approved = value

1006

gobject.timeout_add(_timedelta_to_milliseconds

1007

(self.approval_duration),

1008

self._reset_approved)

1009

1837

1010

1838

1011

## D-Bus methods, signals & properties

1839

1840

## Interfaces

1012

_interface = "se.recompile.Mandos.Client"

1841

1013

1842

1014

## Signals

1843

1015

1854

1026

pass

1855

1027

1856

1028

# PropertyChanged - signal

1857

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

1858

1029

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

1859

1030

def PropertyChanged(self, property, value):

1860

1031

"D-Bus signal"

1894

1065

self.checked_ok()

1895

1066

1896

1067

# Enable - method

1897

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

1898

1068

@dbus.service.method(_interface)

1899

1069

def Enable(self):

1900

1070

"D-Bus method"

1901

1071

self.enable()

1902

1072

1903

1073

# StartChecker - method

1904

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

1905

1074

@dbus.service.method(_interface)

1906

1075

def StartChecker(self):

1907

1076

"D-Bus method"

1908

1077

self.start_checker()

1909

1078

1910

1079

# Disable - method

1911

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

1912

1080

@dbus.service.method(_interface)

1913

1081

def Disable(self):

1914

1082

"D-Bus method"

1915

1083

self.disable()

1916

1084

1917

1085

# StopChecker - method

1918

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

1919

1086

@dbus.service.method(_interface)

1920

1087

def StopChecker(self):

1921

1088

self.stop_checker()

1928

1095

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

1929

1096

1930

1097

# ApprovedByDefault - property

1931

@dbus_service_property(_interface,

1932

signature="b",

1098

@dbus_service_property(_interface, signature="b",

1933

1099

access="readwrite")

1934

1100

def ApprovedByDefault_dbus_property(self, value=None):

1935

1101

if value is None: # get

1937

1103

self.approved_by_default = bool(value)

1938

1104

1939

1105

# ApprovalDelay - property

1940

@dbus_service_property(_interface,

1941

signature="t",

1106

@dbus_service_property(_interface, signature="t",

1942

1107

access="readwrite")

1943

1108

def ApprovalDelay_dbus_property(self, value=None):

1944

1109

if value is None: # get

1945

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

1946

* 1000)

1110

return dbus.UInt64(self.approval_delay_milliseconds())

1947

1111

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

1948

1112

1949

1113

# ApprovalDuration - property

1950

@dbus_service_property(_interface,

1951

signature="t",

1114

@dbus_service_property(_interface, signature="t",

1952

1115

access="readwrite")

1953

1116

def ApprovalDuration_dbus_property(self, value=None):

1954

1117

if value is None: # get

1955

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

1956

* 1000)

1118

return dbus.UInt64(_timedelta_to_milliseconds(

1119

self.approval_duration))

1957

1120

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

1958

1121

1959

1122

# Name - property

1960

@dbus_annotations(

1961

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

1962

1123

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

1963

1124

def Name_dbus_property(self):

1964

1125

return dbus.String(self.name)

1965

1126

1966

1127

# Fingerprint - property

1967

@dbus_annotations(

1968

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

1969

1128

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

1970

1129

def Fingerprint_dbus_property(self):

1971

1130

return dbus.String(self.fingerprint)

1972

1131

1973

1132

# Host - property

1974

@dbus_service_property(_interface,

1975

signature="s",

1133

@dbus_service_property(_interface, signature="s",

1976

1134

access="readwrite")

1977

1135

def Host_dbus_property(self, value=None):

1978

1136

if value is None: # get

1979

1137

return dbus.String(self.host)

1980

self.host = str(value)

1138

self.host = value

1981

1139

1982

1140

# Created - property

1983

@dbus_annotations(

1984

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

1985

1141

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

1986

1142

def Created_dbus_property(self):

1987

return datetime_to_dbus(self.created)

1143

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

1988

1144

1989

1145

# LastEnabled - property

1990

1146

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

1992

1148

return datetime_to_dbus(self.last_enabled)

1993

1149

1994

1150

# Enabled - property

1995

@dbus_service_property(_interface,

1996

signature="b",

1151

@dbus_service_property(_interface, signature="b",

1997

1152

access="readwrite")

1998

1153

def Enabled_dbus_property(self, value=None):

1999

1154

if value is None: # get

2004

1159

self.disable()

2005

1160

2006

1161

# LastCheckedOK - property

2007

@dbus_service_property(_interface,

2008

signature="s",

1162

@dbus_service_property(_interface, signature="s",

2009

1163

access="readwrite")

2010

1164

def LastCheckedOK_dbus_property(self, value=None):

2011

1165

if value is not None:

2013

1167

return

2014

1168

return datetime_to_dbus(self.last_checked_ok)

2015

1169

2016

# LastCheckerStatus - property

2017

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

2018

def LastCheckerStatus_dbus_property(self):

2019

return dbus.Int16(self.last_checker_status)

2020

2021

1170

# Expires - property

2022

1171

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

2023

1172

def Expires_dbus_property(self):

2029

1178

return datetime_to_dbus(self.last_approval_request)

2030

1179

2031

1180

# Timeout - property

2032

@dbus_service_property(_interface,

2033

signature="t",

1181

@dbus_service_property(_interface, signature="t",

2034

1182

access="readwrite")

2035

1183

def Timeout_dbus_property(self, value=None):

2036

1184

if value is None: # get

2037

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

2038

old_timeout = self.timeout

1185

return dbus.UInt64(self.timeout_milliseconds())

2039

1186

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

2040

# Reschedule disabling

2041

if self.enabled:

2042

now = datetime.datetime.utcnow()

2043

self.expires += self.timeout - old_timeout

2044

if self.expires <= now:

2045

# The timeout has passed

2046

self.disable()

2047

else:

2048

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

2049

is None):

2050

return

2051

GLib.source_remove(self.disable_initiator_tag)

2052

self.disable_initiator_tag = GLib.timeout_add(

2053

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

2054

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))

2055

1207

2056

1208

# ExtendedTimeout - property

2057

@dbus_service_property(_interface,

2058

signature="t",

1209

@dbus_service_property(_interface, signature="t",

2059

1210

access="readwrite")

2060

1211

def ExtendedTimeout_dbus_property(self, value=None):

2061

1212

if value is None: # get

2062

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

2063

* 1000)

1213

return dbus.UInt64(self.extended_timeout_milliseconds())

2064

1214

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

2065

1215

2066

1216

# Interval - property

2067

@dbus_service_property(_interface,

2068

signature="t",

1217

@dbus_service_property(_interface, signature="t",

2069

1218

access="readwrite")

2070

1219

def Interval_dbus_property(self, value=None):

2071

1220

if value is None: # get

2072

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

1221

return dbus.UInt64(self.interval_milliseconds())

2073

1222

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

2074

1223

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

2075

1224

return

2076

if self.enabled:

2077

# Reschedule checker run

2078

GLib.source_remove(self.checker_initiator_tag)

2079

self.checker_initiator_tag = GLib.timeout_add(

2080

value, self.start_checker)

2081

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

2082

1230

2083

1231

# Checker - property

2084

@dbus_service_property(_interface,

2085

signature="s",

1232

@dbus_service_property(_interface, signature="s",

2086

1233

access="readwrite")

2087

1234

def Checker_dbus_property(self, value=None):

2088

1235

if value is None: # get

2089

1236

return dbus.String(self.checker_command)

2090

self.checker_command = str(value)

1237

self.checker_command = value

2091

1238

2092

1239

# CheckerRunning - property

2093

@dbus_service_property(_interface,

2094

signature="b",

1240

@dbus_service_property(_interface, signature="b",

2095

1241

access="readwrite")

2096

1242

def CheckerRunning_dbus_property(self, value=None):

2097

1243

if value is None: # get

2102

1248

self.stop_checker()

2103

1249

2104

1250

# ObjectPath - property

2105

@dbus_annotations(

2106

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

2107

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

2108

1251

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

2109

1252

def ObjectPath_dbus_property(self):

2110

1253

return self.dbus_object_path # is already a dbus.ObjectPath

2111

1254

2112

1255

# Secret = property

2113

@dbus_annotations(

2114

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

2115

"invalidates"})

2116

@dbus_service_property(_interface,

2117

signature="ay",

2118

access="write",

2119

byte_arrays=True)

1256

@dbus_service_property(_interface, signature="ay",

1257

access="write", byte_arrays=True)

2120

1258

def Secret_dbus_property(self, value):

2121

self.secret = bytes(value)

1259

self.secret = str(value)

2122

1260

2123

1261

del _interface

2124

1262

2128

1266

self._pipe = child_pipe

2129

1267

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

2130

1268

if not self._pipe.recv():

2131

raise KeyError(fpr)

1269

raise KeyError()

2132

1270

2133

1271

def __getattribute__(self, name):

2134

if name == '_pipe':

1272

if(name == '_pipe'):

2135

1273

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

2136

1274

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

2137

1275

data = self._pipe.recv()

2138

1276

if data[0] == 'data':

2139

1277

return data[1]

2140

1278

if data[0] == 'function':

2141

2142

1279

def func(*args, **kwargs):

2143

1280

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

2144

1281

return self._pipe.recv()[1]

2145

2146

1282

return func

2147

1283

2148

1284

def __setattr__(self, name, value):

2149

if name == '_pipe':

1285

if(name == '_pipe'):

2150

1286

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

2151

1287

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

2152

1288

1289

class ClientDBusTransitional(ClientDBus):

1290

__metaclass__ = AlternateDBusNamesMetaclass

2153

1291

2154

1292

class ClientHandler(socketserver.BaseRequestHandler, object):

2155

1293

"""A class to handle client connections.

2160

1298

def handle(self):

2161

1299

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

2162

1300

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

2163

str(self.client_address))

1301

unicode(self.client_address))

2164

1302

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

2165

1303

self.server.child_pipe.fileno())

2166

1304

2167

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.

2168

1314

2169

1315

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

2170

1316

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

2174

1320

priority = self.server.gnutls_priority

2175

1321

if priority is None:

2176

1322

priority = "NORMAL"

2177

gnutls.priority_set_direct(session._c_object, priority,

2178

None)

1323

(gnutls.library.functions

1324

.gnutls_priority_set_direct(session._c_object,

1325

priority, None))

2179

1326

2180

1327

# Start communication using the Mandos protocol

2181

1328

# Get protocol number

2183

1330

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

2184

1331

try:

2185

1332

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

2186

raise RuntimeError(line)

1333

raise RuntimeError

2187

1334

except (ValueError, IndexError, RuntimeError) as error:

2188

1335

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

2189

1336

return

2191

1338

# Start GnuTLS connection

2192

1339

try:

2193

1340

session.handshake()

2194

except gnutls.Error as error:

1341

except gnutls.errors.GNUTLSError as error:

2195

1342

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

2196

1343

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

2197

1344

# established. Just abandon the request.

2201

1348

approval_required = False

2202

1349

try:

2203

1350

try:

2204

fpr = self.fingerprint(

2205

self.peer_certificate(session))

2206

except (TypeError, gnutls.Error) as error:

1351

fpr = self.fingerprint(self.peer_certificate

1352

(session))

1353

except (TypeError,

1354

gnutls.errors.GNUTLSError) as error:

2207

1355

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

2208

1356

return

2209

1357

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

2222

1370

while True:

2223

1371

if not client.enabled:

2224

1372

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

2225

client.name)

1373

client.name)

2226

1374

if self.server.use_dbus:

2227

1375

# Emit D-Bus signal

2228

1376

client.Rejected("Disabled")

2229

1377

return

2230

1378

2231

if client.approved or not client.approval_delay:

1379

if client._approved or not client.approval_delay:

2232

1380

#We are approved or approval is disabled

2233

1381

break

2234

elif client.approved is None:

1382

elif client._approved is None:

2235

1383

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

2236

1384

client.name)

2237

1385

if self.server.use_dbus:

2238

1386

# Emit D-Bus signal

2239

1387

client.NeedApproval(

2240

client.approval_delay.total_seconds()

2241

* 1000, client.approved_by_default)

1388

client.approval_delay_milliseconds(),

1389

client.approved_by_default)

2242

1390

else:

2243

1391

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

2244

1392

client.name)

2250

1398

#wait until timeout or approved

2251

1399

time = datetime.datetime.now()

2252

1400

client.changedstate.acquire()

2253

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

1401

(client.changedstate.wait

1402

(float(client._timedelta_to_milliseconds(delay)

1403

/ 1000)))

2254

1404

client.changedstate.release()

2255

1405

time2 = datetime.datetime.now()

2256

1406

if (time2 - time) >= delay:

2267

1417

else:

2268

1418

delay -= time2 - time

2269

1419

2270

try:

2271

session.send(client.secret)

2272

except gnutls.Error as error:

2273

logger.warning("gnutls send failed",

2274

exc_info = error)

2275

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

2276

1431

2277

1432

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

2278

1433

# bump the timeout using extended_timeout

2279

client.bump_timeout(client.extended_timeout)

1434

client.checked_ok(client.extended_timeout)

2280

1435

if self.server.use_dbus:

2281

1436

# Emit D-Bus signal

2282

1437

client.GotSecret()

2286

1441

client.approvals_pending -= 1

2287

1442

try:

2288

1443

session.bye()

2289

except gnutls.Error as error:

2290

logger.warning("GnuTLS bye failed",

2291

exc_info=error)

1444

except gnutls.errors.GNUTLSError as error:

1445

logger.warning("GnuTLS bye failed")

2292

1446

2293

1447

@staticmethod

2294

1448

def peer_certificate(session):

2295

1449

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

2296

1450

# If not an OpenPGP certificate...

2297

if (gnutls.certificate_type_get(session._c_object)

2298

!= gnutls.CRT_OPENPGP):

2299

# ...return invalid data

2300

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

2301

1456

list_size = ctypes.c_uint(1)

2302

cert_list = (gnutls.certificate_get_peers

1457

cert_list = (gnutls.library.functions

1458

.gnutls_certificate_get_peers

2303

1459

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

2304

1460

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

2305

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

1461

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

1462

" certificate")

2306

1463

if list_size.value == 0:

2307

1464

return None

2308

1465

cert = cert_list[0]

2312

1469

def fingerprint(openpgp):

2313

1470

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2314

1471

# New GnuTLS "datum" with the OpenPGP public key

2315

datum = gnutls.datum_t(

2316

ctypes.cast(ctypes.c_char_p(openpgp),

2317

ctypes.POINTER(ctypes.c_ubyte)),

2318

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))))

2319

1477

# New empty GnuTLS certificate

2320

crt = gnutls.openpgp_crt_t()

2321

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)))

2322

1481

# Import the OpenPGP public key into the certificate

2323

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

2324

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))

2325

1486

# Verify the self signature in the key

2326

1487

crtverify = ctypes.c_uint()

2327

gnutls.openpgp_crt_verify_self(crt, 0,

2328

ctypes.byref(crtverify))

1488

(gnutls.library.functions

1489

.gnutls_openpgp_crt_verify_self(crt, 0,

1490

ctypes.byref(crtverify)))

2329

1491

if crtverify.value != 0:

2330

gnutls.openpgp_crt_deinit(crt)

2331

raise gnutls.CertificateSecurityError("Verify failed")

1492

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1493

raise (gnutls.errors.CertificateSecurityError

1494

("Verify failed"))

2332

1495

# New buffer for the fingerprint

2333

1496

buf = ctypes.create_string_buffer(20)

2334

1497

buf_len = ctypes.c_size_t()

2335

1498

# Get the fingerprint from the certificate into the buffer

2336

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

2337

ctypes.byref(buf_len))

1499

(gnutls.library.functions

1500

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

1501

ctypes.byref(buf_len)))

2338

1502

# Deinit the certificate

2339

gnutls.openpgp_crt_deinit(crt)

1503

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2340

1504

# Convert the buffer to a Python bytestring

2341

1505

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

2342

1506

# Convert the bytestring to hexadecimal notation

2343

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

1507

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

2344

1508

return hex_fpr

2345

1509

2346

1510

2347

1511

class MultiprocessingMixIn(object):

2348

1512

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

2349

2350

1513

def sub_process_main(self, request, address):

2351

1514

try:

2352

1515

self.finish_request(request, address)

2353

except Exception:

1516

except:

2354

1517

self.handle_error(request, address)

2355

1518

self.close_request(request)

2356

1519

2357

1520

def process_request(self, request, address):

2358

1521

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

2359

1522

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

2360

args = (request, address))

1523

args = (request,

1524

address))

2361

1525

proc.start()

2362

1526

return proc

2363

1527

2364

1528

2365

1529

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2366

1530

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

2367

2368

1531

def process_request(self, request, client_address):

2369

1532

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

2370

1533

2379

1542

2380

1543

def add_pipe(self, parent_pipe, proc):

2381

1544

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

2382

raise NotImplementedError()

1545

raise NotImplementedError

2383

1546

2384

1547

2385

1548

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2391

1554

interface: None or a network interface name (string)

2392

1555

use_ipv6: Boolean; to use IPv6 or not

2393

1556

"""

2394

2395

1557

def __init__(self, server_address, RequestHandlerClass,

2396

interface=None,

2397

use_ipv6=True,

2398

socketfd=None):

2399

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

2400

creating a new one with socket.socket().

2401

"""

1558

interface=None, use_ipv6=True):

2402

1559

self.interface = interface

2403

1560

if use_ipv6:

2404

1561

self.address_family = socket.AF_INET6

2405

if socketfd is not None:

2406

# Save the file descriptor

2407

self.socketfd = socketfd

2408

# Save the original socket.socket() function

2409

self.socket_socket = socket.socket

2410

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

2411

#

2412

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

2413

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

2414

# patching socket.socket.)

2415

#

2416

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

2417

@functools.wraps(socket.socket)

2418

def socket_wrapper(*args, **kwargs):

2419

# Restore original function so subsequent calls are

2420

# not affected.

2421

socket.socket = self.socket_socket

2422

del self.socket_socket

2423

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

2424

# saved file descriptor.

2425

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

2426

# Replace socket.socket() function with wrapper

2427

socket.socket = socket_wrapper

2428

# The socketserver.TCPServer.__init__ will call

2429

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

2430

# socket_wrapper(), if socketfd was set.

2431

1562

socketserver.TCPServer.__init__(self, server_address,

2432

1563

RequestHandlerClass)

2433

2434

1564

def server_bind(self):

2435

1565

"""This overrides the normal server_bind() function

2436

1566

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

2442

1572

self.interface)

2443

1573

else:

2444

1574

try:

2445

self.socket.setsockopt(

2446

socket.SOL_SOCKET, SO_BINDTODEVICE,

2447

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

1575

self.socket.setsockopt(socket.SOL_SOCKET,

1576

SO_BINDTODEVICE,

1577

str(self.interface

1578

+ '\0'))

2448

1579

except socket.error as error:

2449

if error.errno == errno.EPERM:

2450

logger.error("No permission to bind to"

2451

" interface %s", self.interface)

2452

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:

2453

1585

logger.error("SO_BINDTODEVICE not available;"

2454

1586

" cannot bind to interface %s",

2455

1587

self.interface)

2456

elif error.errno == errno.ENODEV:

2457

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

2458

" cannot bind", self.interface)

2459

1588

else:

2460

1589

raise

2461

1590

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

2464

1593

if self.address_family == socket.AF_INET6:

2465

1594

any_address = "::" # in6addr_any

2466

1595

else:

2467

any_address = "0.0.0.0" # INADDR_ANY

1596

any_address = socket.INADDR_ANY

2468

1597

self.server_address = (any_address,

2469

1598

self.server_address[1])

2470

1599

elif not self.server_address[1]:

2471

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

1600

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

1601

0)

2472

1602

# if self.interface:

2473

1603

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

2474

1604

# 0, # port

2486

1616

gnutls_priority GnuTLS priority string

2487

1617

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

2488

1618

2489

Assumes a GLib.MainLoop event loop.

1619

Assumes a gobject.MainLoop event loop.

2490

1620

"""

2491

2492

1621

def __init__(self, server_address, RequestHandlerClass,

2493

interface=None,

2494

use_ipv6=True,

2495

clients=None,

2496

gnutls_priority=None,

2497

use_dbus=True,

2498

socketfd=None):

1622

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

1623

gnutls_priority=None, use_dbus=True):

2499

1624

self.enabled = False

2500

1625

self.clients = clients

2501

1626

if self.clients is None:

2502

self.clients = {}

1627

self.clients = set()

2503

1628

self.use_dbus = use_dbus

2504

1629

self.gnutls_priority = gnutls_priority

2505

1630

IPv6_TCPServer.__init__(self, server_address,

2506

1631

RequestHandlerClass,

2507

1632

interface = interface,

2508

use_ipv6 = use_ipv6,

2509

socketfd = socketfd)

2510

1633

use_ipv6 = use_ipv6)

2511

1634

def server_activate(self):

2512

1635

if self.enabled:

2513

1636

return socketserver.TCPServer.server_activate(self)

2517

1640

2518

1641

def add_pipe(self, parent_pipe, proc):

2519

1642

# Call "handle_ipc" for both data and EOF events

2520

GLib.io_add_watch(

2521

parent_pipe.fileno(),

2522

GLib.IO_IN | GLib.IO_HUP,

2523

functools.partial(self.handle_ipc,

2524

parent_pipe = parent_pipe,

2525

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))

2526

1649

2527

def handle_ipc(self, source, condition,

2528

parent_pipe=None,

2529

proc = None,

2530

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)

2531

1666

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

2532

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

1667

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

2533

1668

# Wait for other process to exit

2534

1669

proc.join()

2535

1670

return False

2542

1677

fpr = request[1]

2543

1678

address = request[2]

2544

1679

2545

for c in self.clients.values():

1680

for c in self.clients:

2546

1681

if c.fingerprint == fpr:

2547

1682

client = c

2548

1683

break

2556

1691

parent_pipe.send(False)

2557

1692

return False

2558

1693

2559

GLib.io_add_watch(

2560

parent_pipe.fileno(),

2561

GLib.IO_IN | GLib.IO_HUP,

2562

functools.partial(self.handle_ipc,

2563

parent_pipe = parent_pipe,

2564

proc = proc,

2565

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))

2566

1702

parent_pipe.send(True)

2567

1703

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

2568

1704

# same fileno

2574

1710

2575

1711

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

2576

1712

funcname)(*args,

2577

**kwargs)))

1713

**kwargs)))

2578

1714

2579

1715

if command == 'getattr':

2580

1716

attrname = request[1]

2581

if isinstance(client_object.__getattribute__(attrname),

2582

collections.Callable):

2583

parent_pipe.send(('function', ))

1717

if callable(client_object.__getattribute__(attrname)):

1718

parent_pipe.send(('function',))

2584

1719

else:

2585

parent_pipe.send((

2586

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

1720

parent_pipe.send(('data', client_object

1721

.__getattribute__(attrname)))

2587

1722

2588

1723

if command == 'setattr':

2589

1724

attrname = request[1]

2593

1728

return True

2594

1729

2595

1730

2596

def rfc3339_duration_to_delta(duration):

2597

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

2598

2599

>>> rfc3339_duration_to_delta("P7D")

2600

datetime.timedelta(7)

2601

>>> rfc3339_duration_to_delta("PT60S")

2602

datetime.timedelta(0, 60)

2603

>>> rfc3339_duration_to_delta("PT60M")

2604

datetime.timedelta(0, 3600)

2605

>>> rfc3339_duration_to_delta("PT24H")

2606

datetime.timedelta(1)

2607

>>> rfc3339_duration_to_delta("P1W")

2608

datetime.timedelta(7)

2609

>>> rfc3339_duration_to_delta("PT5M30S")

2610

datetime.timedelta(0, 330)

2611

>>> rfc3339_duration_to_delta("P1DT3M20S")

2612

datetime.timedelta(1, 200)

2613

"""

2614

2615

# Parsing an RFC 3339 duration with regular expressions is not

2616

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

2617

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

2618

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

2619

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

2620

# avoid excessive use of external libraries.

2621

2622

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

2623

Token = collections.namedtuple("Token", (

2624

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

2625

# a "group" containing digits

2626

"value", # datetime.timedelta or None

2627

"followers")) # Tokens valid after this token

2628

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

2629

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

2630

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

2631

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

2632

datetime.timedelta(seconds=1),

2633

frozenset((token_end, )))

2634

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

2635

datetime.timedelta(minutes=1),

2636

frozenset((token_second, token_end)))

2637

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

2638

datetime.timedelta(hours=1),

2639

frozenset((token_minute, token_end)))

2640

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

2641

None,

2642

frozenset((token_hour, token_minute,

2643

token_second)))

2644

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

2645

datetime.timedelta(days=1),

2646

frozenset((token_time, token_end)))

2647

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

2648

datetime.timedelta(weeks=4),

2649

frozenset((token_day, token_end)))

2650

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

2651

datetime.timedelta(weeks=52),

2652

frozenset((token_month, token_end)))

2653

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

2654

datetime.timedelta(weeks=1),

2655

frozenset((token_end, )))

2656

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

2657

frozenset((token_year, token_month,

2658

token_day, token_time,

2659

token_week)))

2660

# Define starting values

2661

value = datetime.timedelta() # Value so far

2662

found_token = None

2663

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

2664

s = duration # String left to parse

2665

# Loop until end token is found

2666

while found_token is not token_end:

2667

# Search for any currently valid tokens

2668

for token in followers:

2669

match = token.regexp.match(s)

2670

if match is not None:

2671

# Token found

2672

if token.value is not None:

2673

# Value found, parse digits

2674

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

2675

# Add to value so far

2676

value += factor * token.value

2677

# Strip token from string

2678

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

2679

# Go to found token

2680

found_token = token

2681

# Set valid next tokens

2682

followers = found_token.followers

2683

break

2684

else:

2685

# No currently valid tokens were found

2686

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

2687

.format(duration))

2688

# End token found

2689

return value

2690

2691

2692

1731

def string_to_delta(interval):

2693

1732

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

2694

1733

2705

1744

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

2706

1745

datetime.timedelta(0, 330)

2707

1746

"""

2708

2709

try:

2710

return rfc3339_duration_to_delta(interval)

2711

except ValueError:

2712

pass

2713

2714

1747

timevalue = datetime.timedelta(0)

2715

1748

for s in interval.split():

2716

1749

try:

2717

suffix = s[-1]

1750

suffix = unicode(s[-1])

2718

1751

value = int(s[:-1])

2719

1752

if suffix == "d":

2720

1753

delta = datetime.timedelta(value)

2727

1760

elif suffix == "w":

2728

1761

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

2729

1762

else:

2730

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

2731

except IndexError as e:

1763

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

1764

except (ValueError, IndexError) as e:

2732

1765

raise ValueError(*(e.args))

2733

1766

timevalue += delta

2734

1767

return timevalue

2735

1768

2736

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

2737

1794

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

2738

1795

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

2739

1796

2747

1804

sys.exit()

2748

1805

if not noclose:

2749

1806

# Close all standard open file descriptors

2750

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

1807

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

2751

1808

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

2752

1809

raise OSError(errno.ENODEV,

2753

"{} not a character device"

2754

.format(os.devnull))

1810

"%s not a character device"

1811

% os.path.devnull)

2755

1812

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

2756

1813

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

2757

1814

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

2766

1823

2767

1824

parser = argparse.ArgumentParser()

2768

1825

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

2769

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

1826

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

2770

1827

help="show version number and exit")

2771

1828

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

2772

1829

help="Bind to interface IF")

2778

1835

help="Run self-test")

2779

1836

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

2780

1837

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

2781

" to terminal", default=None)

1838

" to terminal")

2782

1839

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

2783

1840

help="Debug level for stdout output")

2784

1841

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

2791

1848

" files")

2792

1849

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

2793

1850

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

2794

" system bus interface", default=None)

1851

" system bus interface")

2795

1852

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

2796

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

2797

default=None)

2798

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

2799

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

2800

" state", default=None)

2801

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

2802

help="Specify a file descriptor to a network"

2803

" socket to use instead of creating one")

2804

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

2805

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

2806

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

2807

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

2808

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

2809

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

2810

default=None)

2811

1853

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

2812

1854

options = parser.parse_args()

2813

1855

2814

1856

if options.check:

2815

1857

import doctest

2816

fail_count, test_count = doctest.testmod()

2817

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

1858

doctest.testmod()

1859

sys.exit()

2818

1860

2819

1861

# Default values for config file for server-global settings

2820

1862

server_defaults = { "interface": "",

2822

1864

"port": "",

2823

1865

"debug": "False",

2824

1866

"priority":

2825

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

2826

":+SIGN-DSA-SHA256",

1867

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

2827

1868

"servicename": "Mandos",

2828

1869

"use_dbus": "True",

2829

1870

"use_ipv6": "True",

2830

1871

"debuglevel": "",

2831

"restore": "True",

2832

"socket": "",

2833

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

2834

"foreground": "False",

2835

"zeroconf": "True",

2836

}

1872

}

2837

1873

2838

1874

# Parse config file for server-global settings

2839

1875

server_config = configparser.SafeConfigParser(server_defaults)

2840

1876

del server_defaults

2841

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

1877

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

1878

"mandos.conf"))

2842

1879

# Convert the SafeConfigParser object to a dict

2843

1880

server_settings = server_config.defaults()

2844

1881

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

2845

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

1882

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

2846

1883

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

2847

1884

option)

2848

1885

if server_settings["port"]:

2849

1886

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

2850

1887

"port")

2851

if server_settings["socket"]:

2852

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

2853

"socket")

2854

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

2855

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

2856

# happen with a supplied network socket.

2857

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

2858

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

2859

["socket"])

2860

1888

del server_config

2861

1889

2862

1890

# Override the settings from the config file with command line

2863

1891

# options, if set.

2864

1892

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

2865

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

2866

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

2867

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

1893

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

1894

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

2868

1895

value = getattr(options, option)

2869

1896

if value is not None:

2870

1897

server_settings[option] = value

2871

1898

del options

2872

1899

# Force all strings to be unicode

2873

1900

for option in server_settings.keys():

2874

if isinstance(server_settings[option], bytes):

2875

server_settings[option] = (server_settings[option]

2876

.decode("utf-8"))

2877

# Force all boolean options to be boolean

2878

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

2879

"foreground", "zeroconf"):

2880

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

2881

# Debug implies foreground

2882

if server_settings["debug"]:

2883

server_settings["foreground"] = True

1901

if type(server_settings[option]) is str:

1902

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

2884

1903

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

2885

1904

2886

1905

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

2887

1906

2888

if (not server_settings["zeroconf"]

2889

and not (server_settings["port"]

2890

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

2891

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

2892

2893

1907

# For convenience

2894

1908

debug = server_settings["debug"]

2895

1909

debuglevel = server_settings["debuglevel"]

2896

1910

use_dbus = server_settings["use_dbus"]

2897

1911

use_ipv6 = server_settings["use_ipv6"]

2898

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

2899

stored_state_file)

2900

foreground = server_settings["foreground"]

2901

zeroconf = server_settings["zeroconf"]

2902

2903

if debug:

2904

initlogger(debug, logging.DEBUG)

2905

else:

2906

if not debuglevel:

2907

initlogger(debug)

2908

else:

2909

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

2910

initlogger(debug, level)

2911

1912

2912

1913

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

2913

syslogger.setFormatter(

2914

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

2915

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

2916

server_settings["servicename"])))

1914

syslogger.setFormatter(logging.Formatter

1915

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

1916

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

1917

% server_settings["servicename"]))

2917

1918

2918

1919

# Parse config file with clients

2919

client_config = configparser.SafeConfigParser(Client

2920

.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)

2921

1929

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

2922

1930

"clients.conf"))

2923

1931

2924

1932

global mandos_dbus_service

2925

1933

mandos_dbus_service = None

2926

1934

2927

socketfd = None

2928

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

2929

socketfd = server_settings["socket"]

2930

tcp_server = MandosServer(

2931

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

2932

ClientHandler,

2933

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

2934

use_ipv6=use_ipv6,

2935

gnutls_priority=server_settings["priority"],

2936

use_dbus=use_dbus,

2937

socketfd=socketfd)

2938

if not foreground:

2939

pidfilename = "/run/mandos.pid"

2940

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

2941

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

2942

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"

2943

1946

try:

2944

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

2945

except IOError as e:

2946

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

2947

exc_info=e)

1947

pidfile = open(pidfilename, "w")

1948

except IOError:

1949

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

2948

1950

2949

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

2950

("mandos", "mandos"),

2951

("nobody", "nogroup")):

1951

try:

1952

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

1953

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

1954

except KeyError:

2952

1955

try:

2953

uid = pwd.getpwnam(name).pw_uid

2954

gid = pwd.getpwnam(group).pw_gid

2955

break

1956

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

1957

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

2956

1958

except KeyError:

2957

continue

2958

else:

2959

uid = 65534

2960

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

2961

1965

try:

2962

1966

os.setgid(gid)

2963

1967

os.setuid(uid)

2964

if debug:

2965

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

2966

gid))

2967

1968

except OSError as error:

2968

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

2969

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

2970

if error.errno != errno.EPERM:

2971

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)

2972

1979

2973

1980

if debug:

2974

1981

# Enable all possible GnuTLS debugging

2975

1982

2976

1983

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

2977

1984

# - GnuTLS manual

2978

gnutls.global_set_log_level(11)

1985

gnutls.library.functions.gnutls_global_set_log_level(11)

2979

1986

2980

@gnutls.log_func

1987

@gnutls.library.types.gnutls_log_func

2981

1988

def debug_gnutls(level, string):

2982

1989

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

2983

1990

2984

gnutls.global_set_log_function(debug_gnutls)

1991

(gnutls.library.functions

1992

.gnutls_global_set_log_function(debug_gnutls))

2985

1993

2986

1994

# Redirect stdin so all checkers get /dev/null

2987

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

1995

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

2988

1996

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

2989

1997

if null > 2:

2990

1998

os.close(null)

1999

else:

2000

# No console logging

2001

logger.removeHandler(console)

2991

2002

2992

2003

# Need to fork before connecting to D-Bus

2993

if not foreground:

2004

if not debug:

2994

2005

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

2995

2006

daemon()

2996

2007

2997

# multiprocessing will use threads, so before we use GLib we need

2998

# to inform GLib that threads will be used.

2999

GLib.threads_init()

3000

3001

2008

global main_loop

3002

2009

# From the Avahi example code

3003

DBusGMainLoop(set_as_default=True)

3004

main_loop = GLib.MainLoop()

2010

DBusGMainLoop(set_as_default=True )

2011

main_loop = gobject.MainLoop()

3005

2012

bus = dbus.SystemBus()

3006

2013

# End of Avahi example code

3007

2014

if use_dbus:

3008

2015

try:

3009

2016

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

3010

bus,

3011

do_not_queue=True)

3012

old_bus_name = dbus.service.BusName(

3013

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

3014

do_not_queue=True)

3015

except dbus.exceptions.DBusException as e:

3016

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")

3017

2023

use_dbus = False

3018

2024

server_settings["use_dbus"] = False

3019

2025

tcp_server.use_dbus = False

3020

if zeroconf:

3021

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3022

service = AvahiServiceToSyslog(

3023

name = server_settings["servicename"],

3024

servicetype = "_mandos._tcp",

3025

protocol = protocol,

3026

bus = bus)

3027

if server_settings["interface"]:

3028

service.interface = if_nametoindex(

3029

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"])))

3030

2033

3031

2034

global multiprocessing_manager

3032

2035

multiprocessing_manager = multiprocessing.Manager()

3033

2036

3034

2037

client_class = Client

3035

2038

if use_dbus:

3036

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

3037

3038

client_settings = Client.config_parser(client_config)

3039

old_client_settings = {}

3040

clients_data = {}

3041

3042

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

3043

global wnull

3044

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

3045

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

3046

# mode

3047

if debug or not foreground:

3048

wnull.close()

3049

3050

# Get client data and settings from last running state.

3051

if server_settings["restore"]:

3052

try:

3053

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

3054

if sys.version_info.major == 2:

3055

clients_data, old_client_settings = pickle.load(

3056

stored_state)

3057

else:

3058

bytes_clients_data, bytes_old_client_settings = (

3059

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

3060

### Fix bytes to strings

3061

## clients_data

3062

# .keys()

3063

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

3064

if isinstance(key, bytes)

3065

else key): value

3066

for key, value in

3067

bytes_clients_data.items() }

3068

del bytes_clients_data

3069

for key in clients_data:

3070

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

3071

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

3072

for k, v in

3073

clients_data[key].items() }

3074

clients_data[key] = value

3075

# .client_structure

3076

value["client_structure"] = [

3077

(s.decode("utf-8")

3078

if isinstance(s, bytes)

3079

else s) for s in

3080

value["client_structure"] ]

3081

# .name & .host

3082

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

3083

if isinstance(value[k], bytes):

3084

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

3085

## old_client_settings

3086

# .keys()

3087

old_client_settings = {

3088

(key.decode("utf-8")

3089

if isinstance(key, bytes)

3090

else key): value

3091

for key, value in

3092

bytes_old_client_settings.items() }

3093

del bytes_old_client_settings

3094

# .host

3095

for value in old_client_settings.values():

3096

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

3097

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

3098

.decode("utf-8"))

3099

os.remove(stored_state_path)

3100

except IOError as e:

3101

if e.errno == errno.ENOENT:

3102

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

3103

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

3104

else:

3105

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

3106

exc_info=e)

3107

raise

3108

except EOFError as e:

3109

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

3110

"EOFError:",

3111

exc_info=e)

3112

3113

with PGPEngine() as pgp:

3114

for client_name, client in clients_data.items():

3115

# Skip removed clients

3116

if client_name not in client_settings:

3117

continue

3118

3119

# Decide which value to use after restoring saved state.

3120

# We have three different values: Old config file,

3121

# new config file, and saved state.

3122

# New config value takes precedence if it differs from old

3123

# config value, otherwise use saved state.

3124

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

3125

try:

3126

# For each value in new config, check if it

3127

# differs from the old config value (Except for

3128

# the "secret" attribute)

3129

if (name != "secret"

3130

and (value !=

3131

old_client_settings[client_name][name])):

3132

client[name] = value

3133

except KeyError:

3134

pass

3135

3136

# Clients who has passed its expire date can still be

3137

# enabled if its last checker was successful. A Client

3138

# whose checker succeeded before we stored its state is

3139

# assumed to have successfully run all checkers during

3140

# downtime.

3141

if client["enabled"]:

3142

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

3143

if not client["last_checked_ok"]:

3144

logger.warning(

3145

"disabling client {} - Client never "

3146

"performed a successful checker".format(

3147

client_name))

3148

client["enabled"] = False

3149

elif client["last_checker_status"] != 0:

3150

logger.warning(

3151

"disabling client {} - Client last"

3152

" checker failed with error code"

3153

" {}".format(

3154

client_name,

3155

client["last_checker_status"]))

3156

client["enabled"] = False

3157

else:

3158

client["expires"] = (

3159

datetime.datetime.utcnow()

3160

+ client["timeout"])

3161

logger.debug("Last checker succeeded,"

3162

" keeping {} enabled".format(

3163

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):

3164

2048

try:

3165

client["secret"] = pgp.decrypt(

3166

client["encrypted_secret"],

3167

client_settings[client_name]["secret"])

3168

except PGPError:

3169

# If decryption fails, we use secret from new settings

3170

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

3171

client_name))

3172

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

3173

["secret"])

3174

3175

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

3176

for client_name in (set(old_client_settings)

3177

- set(client_settings)):

3178

del clients_data[client_name]

3179

for client_name in (set(client_settings)

3180

- set(old_client_settings)):

3181

clients_data[client_name] = client_settings[client_name]

3182

3183

# Create all client objects

3184

for client_name, client in clients_data.items():

3185

tcp_server.clients[client_name] = client_class(

3186

name = client_name,

3187

settings = client,

3188

server_settings = server_settings)

3189

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()))

3190

2058

if not tcp_server.clients:

3191

2059

logger.warning("No clients defined")

3192

3193

if not foreground:

3194

if pidfile is not None:

3195

pid = os.getpid()

3196

try:

3197

with pidfile:

3198

print(pid, file=pidfile)

3199

except IOError:

3200

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

3201

pidfilename, pid)

3202

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

3203

2073

del pidfilename

2074

2075

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

3204

2076

3205

for termsig in (signal.SIGHUP, signal.SIGTERM):

3206

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3207

lambda: main_loop.quit() and False)

2077

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

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

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

3425

lambda *args, **kwargs:

3426

(tcp_server.handle_request

3427

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

2188

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

2189

lambda *args, **kwargs:

2190

(tcp_server.handle_request

2191

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

3428

2192

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: