/mandos/trunk : revision 829

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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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 socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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try:

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from gi.repository import GObject

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except ImportError:

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import gobject as GObject

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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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version = "1.3.0"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.5"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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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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class AvahiError(Exception):

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

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self.value = value

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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357

self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

358

if remove:

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self.remove()

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try:

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self.add()

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362

except dbus.exceptions.DBusException as error:

173

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

174

self.cleanup()

175

os._exit(1)

176

self.rename_count += 1

363

if (error.get_dbus_name()

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

365

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

366

return self.rename(remove=False)

367

else:

368

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

369

self.cleanup()

370

os._exit(1)

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def remove(self):

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

179

374

if self.entry_group_state_changed_match is not None:

181

376

self.entry_group_state_changed_match = None

182

377

if self.group is not None:

183

378

self.group.Reset()

379

184

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def add(self):

185

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

186

382

self.remove()

191

387

avahi.DBUS_INTERFACE_ENTRY_GROUP)

192

388

self.entry_group_state_changed_match = (

193

389

self.group.connect_to_signal(

194

'StateChanged', self .entry_group_state_changed))

390

'StateChanged', self.entry_group_state_changed))

195

391

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

196

392

self.name, self.type)

197

393

self.group.AddService(

203

399

dbus.UInt16(self.port),

204

400

avahi.string_array_to_txt_array(self.TXT))

205

401

self.group.Commit()

402

206

403

def entry_group_state_changed(self, state, error):

207

404

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

208

405

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

214

411

self.rename()

215

412

elif state == avahi.ENTRY_GROUP_FAILURE:

216

413

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

217

unicode(error))

218

raise AvahiGroupError("State changed: %s"

219

% unicode(error))

414

str(error))

415

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

416

220

417

def cleanup(self):

221

418

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

222

419

if self.group is not None:

223

420

try:

224

421

self.group.Free()

225

422

except (dbus.exceptions.UnknownMethodException,

226

dbus.exceptions.DBusException) as e:

423

dbus.exceptions.DBusException):

227

424

pass

228

425

self.group = None

229

426

self.remove()

427

230

428

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

231

429

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

232

430

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

233

bad_states = { avahi.SERVER_INVALID:

234

"Zeroconf server invalid",

235

avahi.SERVER_REGISTERING: None,

236

avahi.SERVER_COLLISION:

237

"Zeroconf server name collision",

238

avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

431

bad_states = {

432

avahi.SERVER_INVALID: "Zeroconf server invalid",

433

avahi.SERVER_REGISTERING: None,

434

avahi.SERVER_COLLISION: "Zeroconf server name collision",

435

avahi.SERVER_FAILURE: "Zeroconf server failure",

436

}

240

437

if state in bad_states:

241

438

if bad_states[state] is not None:

242

439

if error is None:

245

442

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

246

443

self.cleanup()

247

444

elif state == avahi.SERVER_RUNNING:

248

self.add()

445

try:

446

self.add()

447

except dbus.exceptions.DBusException as error:

448

if (error.get_dbus_name()

449

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

450

logger.info("Local Zeroconf service name"

451

" collision.")

452

return self.rename(remove=False)

453

else:

454

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

455

self.cleanup()

456

os._exit(1)

249

457

else:

250

458

if error is None:

251

459

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

252

460

else:

253

461

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

462

254

463

def activate(self):

255

464

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

256

465

if self.server is None:

260

469

follow_name_owner_changes=True),

261

470

avahi.DBUS_INTERFACE_SERVER)

262

471

self.server.connect_to_signal("StateChanged",

263

self.server_state_changed)

472

self.server_state_changed)

264

473

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

265

474

266

475

476

class AvahiServiceToSyslog(AvahiService):

477

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

478

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

479

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

480

syslogger.setFormatter(logging.Formatter(

481

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

482

.format(self.name)))

483

return ret

484

485

# Pretend that we have a GnuTLS module

486

class GnuTLS(object):

487

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

488

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

489

490

_library = ctypes.cdll.LoadLibrary(

491

ctypes.util.find_library("gnutls"))

492

_need_version = b"3.3.0"

493

def __init__(self):

494

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

495

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

496

# happens.

497

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

498

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

499

.format(self._need_version))

500

501

# Unless otherwise indicated, the constants and types below are

502

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

503

504

# Constants

505

E_SUCCESS = 0

506

E_INTERRUPTED = -52

507

E_AGAIN = -28

508

CRT_OPENPGP = 2

509

CLIENT = 2

510

SHUT_RDWR = 0

511

CRD_CERTIFICATE = 1

512

E_NO_CERTIFICATE_FOUND = -49

513

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

514

515

# Types

516

class session_int(ctypes.Structure):

517

_fields_ = []

518

session_t = ctypes.POINTER(session_int)

519

class certificate_credentials_st(ctypes.Structure):

520

_fields_ = []

521

certificate_credentials_t = ctypes.POINTER(

522

certificate_credentials_st)

523

certificate_type_t = ctypes.c_int

524

class datum_t(ctypes.Structure):

525

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

526

('size', ctypes.c_uint)]

527

class openpgp_crt_int(ctypes.Structure):

528

_fields_ = []

529

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

530

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

531

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

532

credentials_type_t = ctypes.c_int

533

transport_ptr_t = ctypes.c_void_p

534

close_request_t = ctypes.c_int

535

536

# Exceptions

537

class Error(Exception):

538

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

539

# exception might be raised from within GnuTLS.__init__,

540

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

541

# global variable has happened.

542

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

543

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

544

# code is passed, convert it to a string with

545

# gnutls.strerror()

546

self.code = code

547

if message is None and code is not None:

548

message = GnuTLS.strerror(code)

549

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

550

message, *args)

551

552

class CertificateSecurityError(Error):

553

pass

554

555

# Classes

556

class Credentials(object):

557

def __init__(self):

558

self._c_object = gnutls.certificate_credentials_t()

559

gnutls.certificate_allocate_credentials(

560

ctypes.byref(self._c_object))

561

self.type = gnutls.CRD_CERTIFICATE

562

563

def __del__(self):

564

gnutls.certificate_free_credentials(self._c_object)

565

566

class ClientSession(object):

567

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

568

self._c_object = gnutls.session_t()

569

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

570

gnutls.set_default_priority(self._c_object)

571

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

572

gnutls.handshake_set_private_extensions(self._c_object,

573

True)

574

self.socket = socket

575

if credentials is None:

576

credentials = gnutls.Credentials()

577

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

578

ctypes.cast(credentials._c_object,

579

ctypes.c_void_p))

580

self.credentials = credentials

581

582

def __del__(self):

583

gnutls.deinit(self._c_object)

584

585

def handshake(self):

586

return gnutls.handshake(self._c_object)

587

588

def send(self, data):

589

data = bytes(data)

590

data_len = len(data)

591

while data_len > 0:

592

data_len -= gnutls.record_send(self._c_object,

593

data[-data_len:],

594

data_len)

595

596

def bye(self):

597

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

598

599

# Error handling functions

600

def _error_code(result):

601

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

602

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

603

if result >= 0:

604

return result

605

if result == gnutls.E_NO_CERTIFICATE_FOUND:

606

raise gnutls.CertificateSecurityError(code = result)

607

raise gnutls.Error(code = result)

608

609

def _retry_on_error(result, func, arguments):

610

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

611

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

612

while result < 0:

613

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

614

return _error_code(result)

615

result = func(*arguments)

616

return result

617

618

# Unless otherwise indicated, the function declarations below are

619

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

620

621

# Functions

622

priority_set_direct = _library.gnutls_priority_set_direct

623

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

624

ctypes.POINTER(ctypes.c_char_p)]

625

priority_set_direct.restype = _error_code

626

627

init = _library.gnutls_init

628

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

629

init.restype = _error_code

630

631

set_default_priority = _library.gnutls_set_default_priority

632

set_default_priority.argtypes = [session_t]

633

set_default_priority.restype = _error_code

634

635

record_send = _library.gnutls_record_send

636

record_send.argtypes = [session_t, ctypes.c_void_p,

637

ctypes.c_size_t]

638

record_send.restype = ctypes.c_ssize_t

639

record_send.errcheck = _retry_on_error

640

641

certificate_allocate_credentials = (

642

_library.gnutls_certificate_allocate_credentials)

643

certificate_allocate_credentials.argtypes = [

644

ctypes.POINTER(certificate_credentials_t)]

645

certificate_allocate_credentials.restype = _error_code

646

647

certificate_free_credentials = (

648

_library.gnutls_certificate_free_credentials)

649

certificate_free_credentials.argtypes = [certificate_credentials_t]

650

certificate_free_credentials.restype = None

651

652

handshake_set_private_extensions = (

653

_library.gnutls_handshake_set_private_extensions)

654

handshake_set_private_extensions.argtypes = [session_t,

655

ctypes.c_int]

656

handshake_set_private_extensions.restype = None

657

658

credentials_set = _library.gnutls_credentials_set

659

credentials_set.argtypes = [session_t, credentials_type_t,

660

ctypes.c_void_p]

661

credentials_set.restype = _error_code

662

663

strerror = _library.gnutls_strerror

664

strerror.argtypes = [ctypes.c_int]

665

strerror.restype = ctypes.c_char_p

666

667

certificate_type_get = _library.gnutls_certificate_type_get

668

certificate_type_get.argtypes = [session_t]

669

certificate_type_get.restype = _error_code

670

671

certificate_get_peers = _library.gnutls_certificate_get_peers

672

certificate_get_peers.argtypes = [session_t,

673

ctypes.POINTER(ctypes.c_uint)]

674

certificate_get_peers.restype = ctypes.POINTER(datum_t)

675

676

global_set_log_level = _library.gnutls_global_set_log_level

677

global_set_log_level.argtypes = [ctypes.c_int]

678

global_set_log_level.restype = None

679

680

global_set_log_function = _library.gnutls_global_set_log_function

681

global_set_log_function.argtypes = [log_func]

682

global_set_log_function.restype = None

683

684

deinit = _library.gnutls_deinit

685

deinit.argtypes = [session_t]

686

deinit.restype = None

687

688

handshake = _library.gnutls_handshake

689

handshake.argtypes = [session_t]

690

handshake.restype = _error_code

691

handshake.errcheck = _retry_on_error

692

693

transport_set_ptr = _library.gnutls_transport_set_ptr

694

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

695

transport_set_ptr.restype = None

696

697

bye = _library.gnutls_bye

698

bye.argtypes = [session_t, close_request_t]

699

bye.restype = _error_code

700

bye.errcheck = _retry_on_error

701

702

check_version = _library.gnutls_check_version

703

check_version.argtypes = [ctypes.c_char_p]

704

check_version.restype = ctypes.c_char_p

705

706

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

707

708

openpgp_crt_init = _library.gnutls_openpgp_crt_init

709

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

710

openpgp_crt_init.restype = _error_code

711

712

openpgp_crt_import = _library.gnutls_openpgp_crt_import

713

openpgp_crt_import.argtypes = [openpgp_crt_t,

714

ctypes.POINTER(datum_t),

715

openpgp_crt_fmt_t]

716

openpgp_crt_import.restype = _error_code

717

718

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

719

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

720

ctypes.POINTER(ctypes.c_uint)]

721

openpgp_crt_verify_self.restype = _error_code

722

723

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

724

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

725

openpgp_crt_deinit.restype = None

726

727

openpgp_crt_get_fingerprint = (

728

_library.gnutls_openpgp_crt_get_fingerprint)

729

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

730

ctypes.c_void_p,

731

ctypes.POINTER(

732

ctypes.c_size_t)]

733

openpgp_crt_get_fingerprint.restype = _error_code

734

735

# Remove non-public functions

736

del _error_code, _retry_on_error

737

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

738

gnutls = GnuTLS()

739

740

def call_pipe(connection, # : multiprocessing.Connection

741

func, *args, **kwargs):

742

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

743

744

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

745

return value on the provided multiprocessing.Connection.

746

"""

747

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

748

connection.close()

749

267

750

class Client(object):

268

751

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

269

752

270

753

Attributes:

271

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

754

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

272

755

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

273

756

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

274

757

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

275

758

to see if the client lives.

276

759

'None' if no process is running.

277

checker_callback_tag: a gobject event source tag, or None

760

checker_callback_tag: a GObject event source tag, or None

278

761

checker_command: string; External command which is run to check

279

762

if client lives. %() expansions are done at

280

763

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

281

764

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

282

checker_initiator_tag: a gobject event source tag, or None

765

checker_initiator_tag: a GObject event source tag, or None

283

766

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

767

client_structure: Object describing what attributes a client has

768

and is used for storing the client at exit

284

769

current_checker_command: string; current running checker_command

285

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

286

disable_initiator_tag: a gobject event source tag, or None

770

disable_initiator_tag: a GObject event source tag, or None

287

771

enabled: bool()

288

772

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

289

773

uniquely identify the client

291

775

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

292

776

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

293

777

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

294

last_enabled: datetime.datetime(); (UTC)

778

last_checker_status: integer between 0 and 255 reflecting exit

779

status of last checker. -1 reflects crashed

780

checker, -2 means no checker completed yet.

781

last_checker_signal: The signal which killed the last checker, if

782

last_checker_status is -1

783

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

295

784

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

296

785

D-Bus identifiers

297

786

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

298

787

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

299

788

until this client is disabled

789

extended_timeout: extra long timeout when secret has been sent

300

790

runtime_expansions: Allowed attributes for runtime expansion.

791

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

792

disabled, or None

793

server_settings: The server_settings dict from main()

301

794

"""

302

795

303

796

runtime_expansions = ("approval_delay", "approval_duration",

304

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

305

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

797

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

798

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

799

"last_approval_request", "last_checked_ok",

306

800

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

801

client_defaults = {

802

"timeout": "PT5M",

803

"extended_timeout": "PT15M",

804

"interval": "PT2M",

805

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

806

"host": "",

807

"approval_delay": "PT0S",

808

"approval_duration": "PT1S",

809

"approved_by_default": "True",

810

"enabled": "True",

811

}

307

812

308

813

@staticmethod

309

def _timedelta_to_milliseconds(td):

310

"Convert a datetime.timedelta() to milliseconds"

311

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

312

+ (td.seconds * 1000)

313

+ (td.microseconds // 1000))

314

315

def timeout_milliseconds(self):

316

"Return the 'timeout' attribute in milliseconds"

317

return self._timedelta_to_milliseconds(self.timeout)

318

319

def interval_milliseconds(self):

320

"Return the 'interval' attribute in milliseconds"

321

return self._timedelta_to_milliseconds(self.interval)

322

323

def approval_delay_milliseconds(self):

324

return self._timedelta_to_milliseconds(self.approval_delay)

325

326

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

327

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

328

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

329

attribute."""

814

def config_parser(config):

815

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

816

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

817

with exceptions for any special settings as defined above.

818

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

819

value given the same arguments.

820

"""

821

settings = {}

822

for client_name in config.sections():

823

section = dict(config.items(client_name))

824

client = settings[client_name] = {}

825

826

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

827

# Reformat values from string types to Python types

828

client["approved_by_default"] = config.getboolean(

829

client_name, "approved_by_default")

830

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

831

"enabled")

832

833

# Uppercase and remove spaces from fingerprint for later

834

# comparison purposes with return value from the

835

# fingerprint() function

836

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

837

.replace(" ", ""))

838

if "secret" in section:

839

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

840

.encode("utf-8"),

841

"base64")

842

elif "secfile" in section:

843

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

844

(section["secfile"])),

845

"rb") as secfile:

846

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

847

else:

848

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

849

.format(section))

850

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

851

client["extended_timeout"] = string_to_delta(

852

section["extended_timeout"])

853

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

854

client["approval_delay"] = string_to_delta(

855

section["approval_delay"])

856

client["approval_duration"] = string_to_delta(

857

section["approval_duration"])

858

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

859

client["last_approval_request"] = None

860

client["last_checked_ok"] = None

861

client["last_checker_status"] = -2

862

863

return settings

864

865

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

330

866

self.name = name

331

if config is None:

332

config = {}

867

if server_settings is None:

868

server_settings = {}

869

self.server_settings = server_settings

870

# adding all client settings

871

for setting, value in settings.items():

872

setattr(self, setting, value)

873

874

if self.enabled:

875

if not hasattr(self, "last_enabled"):

876

self.last_enabled = datetime.datetime.utcnow()

877

if not hasattr(self, "expires"):

878

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

879

+ self.timeout)

880

else:

881

self.last_enabled = None

882

self.expires = None

883

333

884

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

334

# Uppercase and remove spaces from fingerprint for later

335

# comparison purposes with return value from the fingerprint()

336

# function

337

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

338

.replace(" ", ""))

339

885

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

340

if "secret" in config:

341

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

342

elif "secfile" in config:

343

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

344

(config["secfile"])),

345

"rb") as secfile:

346

self.secret = secfile.read()

347

else:

348

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

349

% self.name)

350

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

351

self.created = datetime.datetime.utcnow()

352

self.enabled = False

353

self.last_approval_request = None

354

self.last_enabled = None

355

self.last_checked_ok = None

356

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

357

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

358

self.disable_hook = disable_hook

886

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

887

datetime.datetime.utcnow())

888

889

# attributes specific for this server instance

359

890

self.checker = None

360

891

self.checker_initiator_tag = None

361

892

self.disable_initiator_tag = None

362

893

self.checker_callback_tag = None

363

self.checker_command = config["checker"]

364

894

self.current_checker_command = None

365

self.last_connect = None

366

self._approved = None

367

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

368

True)

895

self.approved = None

369

896

self.approvals_pending = 0

370

self.approval_delay = string_to_delta(

371

config["approval_delay"])

372

self.approval_duration = string_to_delta(

373

config["approval_duration"])

374

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

897

self.changedstate = multiprocessing_manager.Condition(

898

multiprocessing_manager.Lock())

899

self.client_structure = [attr

900

for attr in self.__dict__.keys()

901

if not attr.startswith("_")]

902

self.client_structure.append("client_structure")

903

904

for name, t in inspect.getmembers(

905

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

906

if not name.startswith("_"):

907

self.client_structure.append(name)

375

908

909

# Send notice to process children that client state has changed

376

910

def send_changedstate(self):

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

911

with self.changedstate:

912

self.changedstate.notify_all()

913

381

914

def enable(self):

382

915

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

383

916

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

384

917

# Already enabled

385

918

return

386

self.send_changedstate()

919

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

920

self.enabled = True

387

921

self.last_enabled = datetime.datetime.utcnow()

388

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

389

# and every interval from then on.

390

self.checker_initiator_tag = (gobject.timeout_add

391

(self.interval_milliseconds(),

392

self.start_checker))

393

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

394

self.disable_initiator_tag = (gobject.timeout_add

395

(self.timeout_milliseconds(),

396

self.disable))

397

self.enabled = True

398

# Also start a new checker *right now*.

399

self.start_checker()

922

self.init_checker()

923

self.send_changedstate()

400

924

401

925

def disable(self, quiet=True):

402

926

"""Disable this client."""

403

927

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

404

928

return False

405

929

if not quiet:

406

self.send_changedstate()

407

if not quiet:

408

930

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

409

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

410

gobject.source_remove(self.disable_initiator_tag)

931

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

932

GObject.source_remove(self.disable_initiator_tag)

411

933

self.disable_initiator_tag = None

412

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

413

gobject.source_remove(self.checker_initiator_tag)

934

self.expires = None

935

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

936

GObject.source_remove(self.checker_initiator_tag)

414

937

self.checker_initiator_tag = None

415

938

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

418

939

self.enabled = False

419

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

940

if not quiet:

941

self.send_changedstate()

942

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

420

943

return False

421

944

422

945

def __del__(self):

423

self.disable_hook = None

424

946

self.disable()

425

947

426

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

948

def init_checker(self):

949

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

950

# and every interval from then on.

951

if self.checker_initiator_tag is not None:

952

GObject.source_remove(self.checker_initiator_tag)

953

self.checker_initiator_tag = GObject.timeout_add(

954

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

955

self.start_checker)

956

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

957

if self.disable_initiator_tag is not None:

958

GObject.source_remove(self.disable_initiator_tag)

959

self.disable_initiator_tag = GObject.timeout_add(

960

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

961

# Also start a new checker *right now*.

962

self.start_checker()

963

964

def checker_callback(self, source, condition, connection,

965

command):

427

966

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

428

967

self.checker_callback_tag = None

429

968

self.checker = None

430

if os.WIFEXITED(condition):

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

969

# Read return code from connection (see call_pipe)

970

returncode = connection.recv()

971

connection.close()

972

973

if returncode >= 0:

974

self.last_checker_status = returncode

975

self.last_checker_signal = None

976

if self.last_checker_status == 0:

433

977

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

434

978

vars(self))

435

979

self.checked_ok()

436

980

else:

437

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

438

vars(self))

981

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

439

982

else:

983

self.last_checker_status = -1

984

self.last_checker_signal = -returncode

440

985

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

441

986

vars(self))

987

return False

442

988

443

989

def checked_ok(self):

444

"""Bump up the timeout for this client.

445

446

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

447

alive and well.

448

"""

990

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

449

991

self.last_checked_ok = datetime.datetime.utcnow()

450

gobject.source_remove(self.disable_initiator_tag)

451

self.disable_initiator_tag = (gobject.timeout_add

452

(self.timeout_milliseconds(),

453

self.disable))

992

self.last_checker_status = 0

993

self.last_checker_signal = None

994

self.bump_timeout()

995

996

def bump_timeout(self, timeout=None):

997

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

998

if timeout is None:

999

timeout = self.timeout

1000

if self.disable_initiator_tag is not None:

1001

GObject.source_remove(self.disable_initiator_tag)

1002

self.disable_initiator_tag = None

1003

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

1004

self.disable_initiator_tag = GObject.timeout_add(

1005

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

1006

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

454

1007

455

1008

def need_approval(self):

456

1009

self.last_approval_request = datetime.datetime.utcnow()

461

1014

If a checker already exists, leave it running and do

462

1015

nothing."""

463

1016

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

464

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

465

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

466

# client would inevitably timeout, since no checker would get

467

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

1017

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

1018

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

1019

# would inevitably timeout, since no checker would get a

1020

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

468

1021

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

469

1022

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

470

1023

# should be.

471

1024

472

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

473

try:

474

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

475

except (AttributeError, OSError) as error:

476

if (isinstance(error, OSError)

477

and error.errno != errno.ECHILD):

478

raise error

479

else:

480

if pid:

481

logger.warning("Checker was a zombie")

482

gobject.source_remove(self.checker_callback_tag)

483

self.checker_callback(pid, status,

484

self.current_checker_command)

1025

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

1026

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

1027

self.checker.join()

1028

self.checker = None

485

1029

# Start a new checker if needed

486

1030

if self.checker is None:

1031

# Escape attributes for the shell

1032

escaped_attrs = {

1033

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

1034

for attr in self.runtime_expansions }

487

1035

try:

488

# In case checker_command has exactly one % operator

489

command = self.checker_command % self.host

490

except TypeError:

491

# Escape attributes for the shell

492

escaped_attrs = dict(

493

(attr,

494

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

495

errors=

496

'replace')))

497

for attr in

498

self.runtime_expansions)

499

500

try:

501

command = self.checker_command % escaped_attrs

502

except TypeError as error:

503

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

504

' %s', self.checker_command, error)

505

return True # Try again later

1036

command = self.checker_command % escaped_attrs

1037

except TypeError as error:

1038

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

1039

self.checker_command,

1040

exc_info=error)

1041

return True # Try again later

506

1042

self.current_checker_command = command

507

try:

508

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

509

command, self.name)

510

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

511

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

512

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

513

# always replaced by /dev/null.)

514

self.checker = subprocess.Popen(command,

515

close_fds=True,

516

shell=True, cwd="/")

517

self.checker_callback_tag = (gobject.child_watch_add

518

(self.checker.pid,

519

self.checker_callback,

520

data=command))

521

# The checker may have completed before the gobject

522

# watch was added. Check for this.

523

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

524

if pid:

525

gobject.source_remove(self.checker_callback_tag)

526

self.checker_callback(pid, status, command)

527

except OSError as error:

528

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

529

error)

530

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

1043

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

1044

self.name)

1045

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

1046

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

1047

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

1048

# always replaced by /dev/null.)

1049

# The exception is when not debugging but nevertheless

1050

# running in the foreground; use the previously

1051

# created wnull.

1052

popen_args = { "close_fds": True,

1053

"shell": True,

1054

"cwd": "/" }

1055

if (not self.server_settings["debug"]

1056

and self.server_settings["foreground"]):

1057

popen_args.update({"stdout": wnull,

1058

"stderr": wnull })

1059

pipe = multiprocessing.Pipe(duplex = False)

1060

self.checker = multiprocessing.Process(

1061

target = call_pipe,

1062

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

1063

kwargs = popen_args)

1064

self.checker.start()

1065

self.checker_callback_tag = GObject.io_add_watch(

1066

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

1067

self.checker_callback, pipe[0], command)

1068

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

531

1069

return True

532

1070

533

1071

def stop_checker(self):

534

1072

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

535

1073

if self.checker_callback_tag:

536

gobject.source_remove(self.checker_callback_tag)

1074

GObject.source_remove(self.checker_callback_tag)

537

1075

self.checker_callback_tag = None

538

1076

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

539

1077

return

540

1078

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

541

try:

542

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

543

#time.sleep(0.5)

544

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

545

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

546

except OSError as error:

547

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

548

raise

1079

self.checker.terminate()

549

1080

self.checker = None

550

1081

551

def dbus_service_property(dbus_interface, signature="v",

552

access="readwrite", byte_arrays=False):

1082

1083

def dbus_service_property(dbus_interface,

1084

signature="v",

1085

access="readwrite",

1086

byte_arrays=False):

553

1087

"""Decorators for marking methods of a DBusObjectWithProperties to

554

1088

become properties on the D-Bus.

555

1089

564

1098

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

565

1099

if byte_arrays and signature != "ay":

566

1100

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

567

" signature %r" % signature)

1101

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

1102

568

1103

def decorator(func):

569

1104

func._dbus_is_property = True

570

1105

func._dbus_interface = dbus_interface

575

1110

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

576

1111

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

577

1112

return func

1113

1114

return decorator

1115

1116

1117

def dbus_interface_annotations(dbus_interface):

1118

"""Decorator for marking functions returning interface annotations

1119

1120

Usage:

1121

1122

@dbus_interface_annotations("org.example.Interface")

1123

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

1124

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

1125

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

1126

"false"}

1127

"""

1128

1129

def decorator(func):

1130

func._dbus_is_interface = True

1131

func._dbus_interface = dbus_interface

1132

func._dbus_name = dbus_interface

1133

return func

1134

1135

return decorator

1136

1137

1138

def dbus_annotations(annotations):

1139

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

1140

Usage:

1141

1142

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

1143

"org.freedesktop.DBus.Property."

1144

"EmitsChangedSignal": "false"})

1145

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

1146

access="r")

1147

def Property_dbus_property(self):

1148

return dbus.Boolean(False)

1149

1150

See also the DBusObjectWithAnnotations class.

1151

"""

1152

1153

def decorator(func):

1154

func._dbus_annotations = annotations

1155

return func

1156

578

1157

return decorator

579

1158

580

1159

581

1160

class DBusPropertyException(dbus.exceptions.DBusException):

582

1161

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

583

1162

"""

584

def __unicode__(self):

585

return unicode(str(self))

1163

pass

586

1164

587

1165

588

1166

class DBusPropertyAccessException(DBusPropertyException):

597

1175

pass

598

1176

599

1177

600

class DBusObjectWithProperties(dbus.service.Object):

1178

class DBusObjectWithAnnotations(dbus.service.Object):

1179

"""A D-Bus object with annotations.

1180

1181

Classes inheriting from this can use the dbus_annotations

1182

decorator to add annotations to methods or signals.

1183

"""

1184

1185

@staticmethod

1186

def _is_dbus_thing(thing):

1187

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

1188

1189

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

1190

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

1191

"""

1192

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

1193

False)

1194

1195

def _get_all_dbus_things(self, thing):

1196

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

1197

"""

1198

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

1199

athing.__get__(self))

1200

for cls in self.__class__.__mro__

1201

for name, athing in

1202

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

1203

1204

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1205

out_signature = "s",

1206

path_keyword = 'object_path',

1207

connection_keyword = 'connection')

1208

def Introspect(self, object_path, connection):

1209

"""Overloading of standard D-Bus method.

1210

1211

Inserts annotation tags on methods and signals.

1212

"""

1213

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

1214

connection)

1215

try:

1216

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

1217

1218

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

1219

# Add annotation tags

1220

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

1221

for tag in if_tag.getElementsByTagName(typ):

1222

annots = dict()

1223

for name, prop in (self.

1224

_get_all_dbus_things(typ)):

1225

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

1226

and prop._dbus_interface

1227

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

1228

annots.update(getattr(

1229

prop, "_dbus_annotations", {}))

1230

for name, value in annots.items():

1231

ann_tag = document.createElement(

1232

"annotation")

1233

ann_tag.setAttribute("name", name)

1234

ann_tag.setAttribute("value", value)

1235

tag.appendChild(ann_tag)

1236

# Add interface annotation tags

1237

for annotation, value in dict(

1238

itertools.chain.from_iterable(

1239

annotations().items()

1240

for name, annotations

1241

in self._get_all_dbus_things("interface")

1242

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

1243

)).items():

1244

ann_tag = document.createElement("annotation")

1245

ann_tag.setAttribute("name", annotation)

1246

ann_tag.setAttribute("value", value)

1247

if_tag.appendChild(ann_tag)

1248

# Fix argument name for the Introspect method itself

1249

if (if_tag.getAttribute("name")

1250

== dbus.INTROSPECTABLE_IFACE):

1251

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

1252

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

1253

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

1254

if (arg.getAttribute("direction")

1255

== "out"):

1256

arg.setAttribute("name",

1257

"xml_data")

1258

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

1259

document.unlink()

1260

except (AttributeError, xml.dom.DOMException,

1261

xml.parsers.expat.ExpatError) as error:

1262

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

1263

exc_info=error)

1264

return xmlstring

1265

1266

1267

class DBusObjectWithProperties(DBusObjectWithAnnotations):

601

1268

"""A D-Bus object with properties.

602

1269

603

1270

Classes inheriting from this can use the dbus_service_property

604

1271

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

605

1272

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

606

1273

"""

607

1274

608

@staticmethod

609

def _is_dbus_property(obj):

610

return getattr(obj, "_dbus_is_property", False)

611

612

def _get_all_dbus_properties(self):

613

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

614

"""

615

return ((prop._dbus_name, prop)

616

for name, prop in

617

inspect.getmembers(self, self._is_dbus_property))

618

619

1275

def _get_dbus_property(self, interface_name, property_name):

620

1276

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

621

1277

property with the specified name and interface.

622

1278

"""

623

for name in (property_name,

624

property_name + "_dbus_property"):

625

prop = getattr(self, name, None)

626

if (prop is None

627

or not self._is_dbus_property(prop)

628

or prop._dbus_name != property_name

629

or (interface_name and prop._dbus_interface

630

and interface_name != prop._dbus_interface)):

631

continue

632

return prop

1279

for cls in self.__class__.__mro__:

1280

for name, value in inspect.getmembers(

1281

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

1282

if (value._dbus_name == property_name

1283

and value._dbus_interface == interface_name):

1284

return value.__get__(self)

1285

633

1286

# No such property

634

raise DBusPropertyNotFound(self.dbus_object_path + ":"

635

+ interface_name + "."

636

+ property_name)

637

638

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

1287

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

1288

self.dbus_object_path, interface_name, property_name))

1289

1290

@classmethod

1291

def _get_all_interface_names(cls):

1292

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

1293

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

1294

"_dbus_interface", None)

1295

for x in (inspect.getmro(cls))

1296

for attr in dir(x))

1297

if name is not None)

1298

1299

@dbus.service.method(dbus.PROPERTIES_IFACE,

1300

in_signature="ss",

639

1301

out_signature="v")

640

1302

def Get(self, interface_name, property_name):

641

1303

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

659

1321

# The byte_arrays option is not supported yet on

660

1322

# signatures other than "ay".

661

1323

if prop._dbus_signature != "ay":

662

raise ValueError

663

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

664

for byte in value))

1324

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

1325

"'ay' signature {!r}"

1326

.format(prop._dbus_signature))

1327

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

1328

for byte in value))

665

1329

prop(value)

666

1330

667

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

1331

@dbus.service.method(dbus.PROPERTIES_IFACE,

1332

in_signature="s",

668

1333

out_signature="a{sv}")

669

1334

def GetAll(self, interface_name):

670

1335

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

671

1336

standard.

672

1337

673

1338

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

674

1339

"""

675

all = {}

676

for name, prop in self._get_all_dbus_properties():

1340

properties = {}

1341

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

677

1342

if (interface_name

678

1343

and interface_name != prop._dbus_interface):

679

1344

# Interface non-empty but did not match

683

1348

continue

684

1349

value = prop()

685

1350

if not hasattr(value, "variant_level"):

686

all[name] = value

1351

properties[name] = value

687

1352

continue

688

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

689

value.variant_level+1)

690

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

1353

properties[name] = type(value)(

1354

value, variant_level = value.variant_level + 1)

1355

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

1356

1357

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

1358

def PropertiesChanged(self, interface_name, changed_properties,

1359

invalidated_properties):

1360

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

1361

standard.

1362

"""

1363

pass

691

1364

692

1365

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

693

1366

out_signature="s",

694

1367

path_keyword='object_path',

695

1368

connection_keyword='connection')

696

1369

def Introspect(self, object_path, connection):

697

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

1370

"""Overloading of standard D-Bus method.

1371

1372

Inserts property tags and interface annotation tags.

698

1373

"""

699

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

700

connection)

1374

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1375

object_path,

1376

connection)

701

1377

try:

702

1378

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

1379

703

1380

def make_tag(document, name, prop):

704

1381

e = document.createElement("property")

705

1382

e.setAttribute("name", name)

706

1383

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

707

1384

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

708

1385

return e

1386

709

1387

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

1388

# Add property tags

710

1389

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

711

1390

for name, prop

712

in self._get_all_dbus_properties()

1391

in self._get_all_dbus_things("property")

713

1392

if prop._dbus_interface

714

1393

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

715

1394

if_tag.appendChild(tag)

1395

# Add annotation tags for properties

1396

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

1397

annots = dict()

1398

for name, prop in self._get_all_dbus_things(

1399

"property"):

1400

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

1401

and prop._dbus_interface

1402

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

1403

annots.update(getattr(

1404

prop, "_dbus_annotations", {}))

1405

for name, value in annots.items():

1406

ann_tag = document.createElement(

1407

"annotation")

1408

ann_tag.setAttribute("name", name)

1409

ann_tag.setAttribute("value", value)

1410

tag.appendChild(ann_tag)

716

1411

# Add the names to the return values for the

717

1412

# "org.freedesktop.DBus.Properties" methods

718

1413

if (if_tag.getAttribute("name")

733

1428

except (AttributeError, xml.dom.DOMException,

734

1429

xml.parsers.expat.ExpatError) as error:

735

1430

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

736

error)

737

return xmlstring

738

739

1431

exc_info=error)

1432

return xmlstring

1433

1434

try:

1435

dbus.OBJECT_MANAGER_IFACE

1436

except AttributeError:

1437

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

1438

1439

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1440

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

1441

1442

Classes inheriting from this exposes the standard

1443

GetManagedObjects call and the InterfacesAdded and

1444

InterfacesRemoved signals on the standard

1445

"org.freedesktop.DBus.ObjectManager" interface.

1446

1447

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

1448

manually.

1449

"""

1450

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1451

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

1452

def GetManagedObjects(self):

1453

"""This function must be overridden"""

1454

raise NotImplementedError()

1455

1456

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1457

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

1458

def InterfacesAdded(self, object_path, interfaces_and_properties):

1459

pass

1460

1461

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

1462

def InterfacesRemoved(self, object_path, interfaces):

1463

pass

1464

1465

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1466

out_signature = "s",

1467

path_keyword = 'object_path',

1468

connection_keyword = 'connection')

1469

def Introspect(self, object_path, connection):

1470

"""Overloading of standard D-Bus method.

1471

1472

Override return argument name of GetManagedObjects to be

1473

"objpath_interfaces_and_properties"

1474

"""

1475

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1476

object_path,

1477

connection)

1478

try:

1479

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

1480

1481

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

1482

# Fix argument name for the GetManagedObjects method

1483

if (if_tag.getAttribute("name")

1484

== dbus.OBJECT_MANAGER_IFACE):

1485

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

1486

if (cn.getAttribute("name")

1487

== "GetManagedObjects"):

1488

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

1489

if (arg.getAttribute("direction")

1490

== "out"):

1491

arg.setAttribute(

1492

"name",

1493

"objpath_interfaces"

1494

"_and_properties")

1495

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

1496

document.unlink()

1497

except (AttributeError, xml.dom.DOMException,

1498

xml.parsers.expat.ExpatError) as error:

1499

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

1500

exc_info = error)

1501

return xmlstring

1502

1503

def datetime_to_dbus(dt, variant_level=0):

1504

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

1505

if dt is None:

1506

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

1507

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

1508

1509

1510

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1511

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

1512

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

1513

interface names according to the "alt_interface_names" mapping.

1514

Usage:

1515

1516

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

1517

"net.example.AlternateInterface"})

1518

class SampleDBusObject(dbus.service.Object):

1519

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

1520

def SampleDBusMethod():

1521

pass

1522

1523

The above "SampleDBusMethod" on "SampleDBusObject" will be

1524

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

1525

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

1526

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

1527

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

1528

1529

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

1530

(from DBusObjectWithProperties) and interfaces (from the

1531

dbus_interface_annotations decorator).

1532

"""

1533

1534

def wrapper(cls):

1535

for orig_interface_name, alt_interface_name in (

1536

alt_interface_names.items()):

1537

attr = {}

1538

interface_names = set()

1539

# Go though all attributes of the class

1540

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

1541

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

1542

# with the wrong interface name

1543

if (not hasattr(attribute, "_dbus_interface")

1544

or not attribute._dbus_interface.startswith(

1545

orig_interface_name)):

1546

continue

1547

# Create an alternate D-Bus interface name based on

1548

# the current name

1549

alt_interface = attribute._dbus_interface.replace(

1550

orig_interface_name, alt_interface_name)

1551

interface_names.add(alt_interface)

1552

# Is this a D-Bus signal?

1553

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

1554

# Extract the original non-method undecorated

1555

# function by black magic

1556

if sys.version_info.major == 2:

1557

nonmethod_func = (dict(

1558

zip(attribute.func_code.co_freevars,

1559

attribute.__closure__))

1560

["func"].cell_contents)

1561

else:

1562

nonmethod_func = (dict(

1563

zip(attribute.__code__.co_freevars,

1564

attribute.__closure__))

1565

["func"].cell_contents)

1566

# Create a new, but exactly alike, function

1567

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

1568

# with the alternate D-Bus interface name

1569

new_function = copy_function(nonmethod_func)

1570

new_function = (dbus.service.signal(

1571

alt_interface,

1572

attribute._dbus_signature)(new_function))

1573

# Copy annotations, if any

1574

try:

1575

new_function._dbus_annotations = dict(

1576

attribute._dbus_annotations)

1577

except AttributeError:

1578

pass

1579

# Define a creator of a function to call both the

1580

# original and alternate functions, so both the

1581

# original and alternate signals gets sent when

1582

# the function is called

1583

def fixscope(func1, func2):

1584

"""This function is a scope container to pass

1585

func1 and func2 to the "call_both" function

1586

outside of its arguments"""

1587

1588

@functools.wraps(func2)

1589

def call_both(*args, **kwargs):

1590

"""This function will emit two D-Bus

1591

signals by calling func1 and func2"""

1592

func1(*args, **kwargs)

1593

func2(*args, **kwargs)

1594

# Make wrapper function look like a D-Bus signal

1595

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

1596

if name.startswith("_dbus_"):

1597

setattr(call_both, name, attr)

1598

1599

return call_both

1600

# Create the "call_both" function and add it to

1601

# the class

1602

attr[attrname] = fixscope(attribute, new_function)

1603

# Is this a D-Bus method?

1604

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

1605

# Create a new, but exactly alike, function

1606

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

1607

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

1608

# to the class.

1609

attr[attrname] = (

1610

dbus.service.method(

1611

alt_interface,

1612

attribute._dbus_in_signature,

1613

attribute._dbus_out_signature)

1614

(copy_function(attribute)))

1615

# Copy annotations, if any

1616

try:

1617

attr[attrname]._dbus_annotations = dict(

1618

attribute._dbus_annotations)

1619

except AttributeError:

1620

pass

1621

# Is this a D-Bus property?

1622

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

1623

# Create a new, but exactly alike, function

1624

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

1625

# property with the alternate D-Bus interface

1626

# name. Add it to the class.

1627

attr[attrname] = (dbus_service_property(

1628

alt_interface, attribute._dbus_signature,

1629

attribute._dbus_access,

1630

attribute._dbus_get_args_options

1631

["byte_arrays"])

1632

(copy_function(attribute)))

1633

# Copy annotations, if any

1634

try:

1635

attr[attrname]._dbus_annotations = dict(

1636

attribute._dbus_annotations)

1637

except AttributeError:

1638

pass

1639

# Is this a D-Bus interface?

1640

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

1641

# Create a new, but exactly alike, function

1642

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

1643

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

1644

# to the class.

1645

attr[attrname] = (

1646

dbus_interface_annotations(alt_interface)

1647

(copy_function(attribute)))

1648

if deprecate:

1649

# Deprecate all alternate interfaces

1650

iname="_AlternateDBusNames_interface_annotation{}"

1651

for interface_name in interface_names:

1652

1653

@dbus_interface_annotations(interface_name)

1654

def func(self):

1655

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

1656

"true" }

1657

# Find an unused name

1658

for aname in (iname.format(i)

1659

for i in itertools.count()):

1660

if aname not in attr:

1661

attr[aname] = func

1662

break

1663

if interface_names:

1664

# Replace the class with a new subclass of it with

1665

# methods, signals, etc. as created above.

1666

if sys.version_info.major == 2:

1667

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

1668

(cls, ), attr)

1669

else:

1670

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

1671

(cls, ), attr)

1672

return cls

1673

1674

return wrapper

1675

1676

1677

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

1678

"se.bsnet.fukt.Mandos"})

740

1679

class ClientDBus(Client, DBusObjectWithProperties):

741

1680

"""A Client class using D-Bus

742

1681

746

1685

"""

747

1686

748

1687

runtime_expansions = (Client.runtime_expansions

749

+ ("dbus_object_path",))

1688

+ ("dbus_object_path", ))

1689

1690

_interface = "se.recompile.Mandos.Client"

750

1691

751

1692

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

752

1693

753

1694

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

754

self._approvals_pending = 0

755

1695

self.bus = bus

756

1696

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

757

1697

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

758

1698

# the D-Bus

759

client_object_name = unicode(self.name).translate(

1699

client_object_name = str(self.name).translate(

760

1700

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

761

1701

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

762

self.dbus_object_path = (dbus.ObjectPath

763

("/clients/" + client_object_name))

1702

self.dbus_object_path = dbus.ObjectPath(

1703

"/clients/" + client_object_name)

764

1704

DBusObjectWithProperties.__init__(self, self.bus,

765

1705

self.dbus_object_path)

766

767

def _get_approvals_pending(self):

768

return self._approvals_pending

769

def _set_approvals_pending(self, value):

770

old_value = self._approvals_pending

771

self._approvals_pending = value

772

bval = bool(value)

773

if (hasattr(self, "dbus_object_path")

774

and bval is not bool(old_value)):

775

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

776

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

777

dbus_bool)

778

779

approvals_pending = property(_get_approvals_pending,

780

_set_approvals_pending)

781

del _get_approvals_pending, _set_approvals_pending

782

783

@staticmethod

784

def _datetime_to_dbus(dt, variant_level=0):

785

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

786

return dbus.String(dt.isoformat(),

787

variant_level=variant_level)

788

789

def enable(self):

790

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

791

r = Client.enable(self)

792

if oldstate != self.enabled:

793

# Emit D-Bus signals

794

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

795

dbus.Boolean(True, variant_level=1))

796

self.PropertyChanged(

797

dbus.String("LastEnabled"),

798

self._datetime_to_dbus(self.last_enabled,

799

variant_level=1))

800

return r

801

802

def disable(self, quiet = False):

803

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

804

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

805

if not quiet and oldstate != self.enabled:

806

# Emit D-Bus signal

807

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

808

dbus.Boolean(False, variant_level=1))

809

return r

1706

1707

def notifychangeproperty(transform_func, dbus_name,

1708

type_func=lambda x: x,

1709

variant_level=1,

1710

invalidate_only=False,

1711

_interface=_interface):

1712

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

1713

its changes to DBus.

1714

1715

transform_fun: Function that takes a value and a variant_level

1716

and transforms it to a D-Bus type.

1717

dbus_name: D-Bus name of the variable

1718

type_func: Function that transform the value before sending it

1719

to the D-Bus. Default: no transform

1720

variant_level: D-Bus variant level. Default: 1

1721

"""

1722

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

1723

1724

def setter(self, value):

1725

if hasattr(self, "dbus_object_path"):

1726

if (not hasattr(self, attrname) or

1727

type_func(getattr(self, attrname, None))

1728

!= type_func(value)):

1729

if invalidate_only:

1730

self.PropertiesChanged(

1731

_interface, dbus.Dictionary(),

1732

dbus.Array((dbus_name, )))

1733

else:

1734

dbus_value = transform_func(

1735

type_func(value),

1736

variant_level = variant_level)

1737

self.PropertyChanged(dbus.String(dbus_name),

1738

dbus_value)

1739

self.PropertiesChanged(

1740

_interface,

1741

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

1742

dbus_value }),

1743

dbus.Array())

1744

setattr(self, attrname, value)

1745

1746

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

1747

1748

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1749

approvals_pending = notifychangeproperty(dbus.Boolean,

1750

"ApprovalPending",

1751

type_func = bool)

1752

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

1753

last_enabled = notifychangeproperty(datetime_to_dbus,

1754

"LastEnabled")

1755

checker = notifychangeproperty(

1756

dbus.Boolean, "CheckerRunning",

1757

type_func = lambda checker: checker is not None)

1758

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1759

"LastCheckedOK")

1760

last_checker_status = notifychangeproperty(dbus.Int16,

1761

"LastCheckerStatus")

1762

last_approval_request = notifychangeproperty(

1763

datetime_to_dbus, "LastApprovalRequest")

1764

approved_by_default = notifychangeproperty(dbus.Boolean,

1765

"ApprovedByDefault")

1766

approval_delay = notifychangeproperty(

1767

dbus.UInt64, "ApprovalDelay",

1768

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

1769

approval_duration = notifychangeproperty(

1770

dbus.UInt64, "ApprovalDuration",

1771

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

1772

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

1773

timeout = notifychangeproperty(

1774

dbus.UInt64, "Timeout",

1775

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

1776

extended_timeout = notifychangeproperty(

1777

dbus.UInt64, "ExtendedTimeout",

1778

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

1779

interval = notifychangeproperty(

1780

dbus.UInt64, "Interval",

1781

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

1782

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

1783

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

1784

invalidate_only=True)

1785

1786

del notifychangeproperty

810

1787

811

1788

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

812

1789

try:

817

1794

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

818

1795

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

819

1796

820

def checker_callback(self, pid, condition, command,

821

*args, **kwargs):

822

self.checker_callback_tag = None

823

self.checker = None

824

# Emit D-Bus signal

825

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

826

dbus.Boolean(False, variant_level=1))

827

if os.WIFEXITED(condition):

828

exitstatus = os.WEXITSTATUS(condition)

1797

def checker_callback(self, source, condition,

1798

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

1799

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

1800

connection, command, *args,

1801

**kwargs)

1802

exitstatus = self.last_checker_status

1803

if exitstatus >= 0:

829

1804

# Emit D-Bus signal

830

1805

self.CheckerCompleted(dbus.Int16(exitstatus),

831

dbus.Int64(condition),

1806

# This is specific to GNU libC

1807

dbus.Int64(exitstatus << 8),

832

1808

dbus.String(command))

833

1809

else:

834

1810

# Emit D-Bus signal

835

1811

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

836

dbus.Int64(condition),

1812

dbus.Int64(

1813

# This is specific to GNU libC

1814

(exitstatus << 8)

1815

| self.last_checker_signal),

837

1816

dbus.String(command))

838

839

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

840

*args, **kwargs)

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastCheckedOK"),

847

(self._datetime_to_dbus(self.last_checked_ok,

848

variant_level=1)))

849

850

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

851

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

852

# Emit D-Bus signal

853

self.PropertyChanged(

854

dbus.String("LastApprovalRequest"),

855

(self._datetime_to_dbus(self.last_approval_request,

856

variant_level=1)))

857

return r

1817

return ret

858

1818

859

1819

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

860

old_checker = self.checker

861

if self.checker is not None:

862

old_checker_pid = self.checker.pid

863

else:

864

old_checker_pid = None

1820

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

865

1821

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

866

1822

# Only if new checker process was started

867

1823

if (self.checker is not None

868

1824

and old_checker_pid != self.checker.pid):

869

1825

# Emit D-Bus signal

870

1826

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

874

1827

return r

875

1828

876

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

877

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

878

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

879

if (old_checker is not None

880

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

881

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

882

dbus.Boolean(False, variant_level=1))

883

return r

884

885

1829

def _reset_approved(self):

886

self._approved = None

1830

self.approved = None

887

1831

return False

888

1832

889

1833

def approve(self, value=True):

1834

self.approved = value

1835

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

1836

* 1000), self._reset_approved)

890

1837

self.send_changedstate()

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

893

(self.approval_duration),

894

self._reset_approved)

895

896

1838

897

1839

## D-Bus methods, signals & properties

898

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

1840

1841

## Interfaces

899

1842

900

1843

## Signals

901

1844

912

1855

pass

913

1856

914

1857

# PropertyChanged - signal

1858

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

915

1859

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

916

1860

def PropertyChanged(self, property, value):

917

1861

"D-Bus signal"

951

1895

self.checked_ok()

952

1896

953

1897

# Enable - method

1898

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

954

1899

@dbus.service.method(_interface)

955

1900

def Enable(self):

956

1901

"D-Bus method"

957

1902

self.enable()

958

1903

959

1904

# StartChecker - method

1905

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

960

1906

@dbus.service.method(_interface)

961

1907

def StartChecker(self):

962

1908

"D-Bus method"

963

1909

self.start_checker()

964

1910

965

1911

# Disable - method

1912

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

966

1913

@dbus.service.method(_interface)

967

1914

def Disable(self):

968

1915

"D-Bus method"

969

1916

self.disable()

970

1917

971

1918

# StopChecker - method

1919

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

972

1920

@dbus.service.method(_interface)

973

1921

def StopChecker(self):

974

1922

self.stop_checker()

981

1929

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

982

1930

983

1931

# ApprovedByDefault - property

984

@dbus_service_property(_interface, signature="b",

1932

@dbus_service_property(_interface,

1933

signature="b",

985

1934

access="readwrite")

986

1935

def ApprovedByDefault_dbus_property(self, value=None):

987

1936

if value is None: # get

988

1937

return dbus.Boolean(self.approved_by_default)

989

1938

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

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

992

dbus.Boolean(value, variant_level=1))

993

1939

994

1940

# ApprovalDelay - property

995

@dbus_service_property(_interface, signature="t",

1941

@dbus_service_property(_interface,

1942

signature="t",

996

1943

access="readwrite")

997

1944

def ApprovalDelay_dbus_property(self, value=None):

998

1945

if value is None: # get

999

return dbus.UInt64(self.approval_delay_milliseconds())

1946

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

1947

* 1000)

1000

1948

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

1001

# Emit D-Bus signal

1002

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

1003

dbus.UInt64(value, variant_level=1))

1004

1949

1005

1950

# ApprovalDuration - property

1006

@dbus_service_property(_interface, signature="t",

1951

@dbus_service_property(_interface,

1952

signature="t",

1007

1953

access="readwrite")

1008

1954

def ApprovalDuration_dbus_property(self, value=None):

1009

1955

if value is None: # get

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1011

self.approval_duration))

1956

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

1957

* 1000)

1012

1958

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

1013

# Emit D-Bus signal

1014

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

1015

dbus.UInt64(value, variant_level=1))

1016

1959

1017

1960

# Name - property

1961

@dbus_annotations(

1962

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

1018

1963

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

1019

1964

def Name_dbus_property(self):

1020

1965

return dbus.String(self.name)

1021

1966

1022

1967

# Fingerprint - property

1968

@dbus_annotations(

1969

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

1023

1970

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

1024

1971

def Fingerprint_dbus_property(self):

1025

1972

return dbus.String(self.fingerprint)

1026

1973

1027

1974

# Host - property

1028

@dbus_service_property(_interface, signature="s",

1975

@dbus_service_property(_interface,

1976

signature="s",

1029

1977

access="readwrite")

1030

1978

def Host_dbus_property(self, value=None):

1031

1979

if value is None: # get

1032

1980

return dbus.String(self.host)

1033

self.host = value

1034

# Emit D-Bus signal

1035

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

1036

dbus.String(value, variant_level=1))

1981

self.host = str(value)

1037

1982

1038

1983

# Created - property

1984

@dbus_annotations(

1985

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

1039

1986

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

1040

1987

def Created_dbus_property(self):

1041

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

1988

return datetime_to_dbus(self.created)

1042

1989

1043

1990

# LastEnabled - property

1044

1991

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

1045

1992

def LastEnabled_dbus_property(self):

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

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

1993

return datetime_to_dbus(self.last_enabled)

1049

1994

1050

1995

# Enabled - property

1051

@dbus_service_property(_interface, signature="b",

1996

@dbus_service_property(_interface,

1997

signature="b",

1052

1998

access="readwrite")

1053

1999

def Enabled_dbus_property(self, value=None):

1054

2000

if value is None: # get

1059

2005

self.disable()

1060

2006

1061

2007

# LastCheckedOK - property

1062

@dbus_service_property(_interface, signature="s",

2008

@dbus_service_property(_interface,

2009

signature="s",

1063

2010

access="readwrite")

1064

2011

def LastCheckedOK_dbus_property(self, value=None):

1065

2012

if value is not None:

1066

2013

self.checked_ok()

1067

2014

return

1068

if self.last_checked_ok is None:

1069

return dbus.String("")

1070

return dbus.String(self._datetime_to_dbus(self

1071

.last_checked_ok))

2015

return datetime_to_dbus(self.last_checked_ok)

2016

2017

# LastCheckerStatus - property

2018

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

2019

def LastCheckerStatus_dbus_property(self):

2020

return dbus.Int16(self.last_checker_status)

2021

2022

# Expires - property

2023

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

2024

def Expires_dbus_property(self):

2025

return datetime_to_dbus(self.expires)

1072

2026

1073

2027

# LastApprovalRequest - property

1074

2028

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

1075

2029

def LastApprovalRequest_dbus_property(self):

1076

if self.last_approval_request is None:

1077

return dbus.String("")

1078

return dbus.String(self.

1079

_datetime_to_dbus(self

1080

.last_approval_request))

2030

return datetime_to_dbus(self.last_approval_request)

1081

2031

1082

2032

# Timeout - property

1083

@dbus_service_property(_interface, signature="t",

2033

@dbus_service_property(_interface,

2034

signature="t",

1084

2035

access="readwrite")

1085

2036

def Timeout_dbus_property(self, value=None):

1086

2037

if value is None: # get

1087

return dbus.UInt64(self.timeout_milliseconds())

2038

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

2039

old_timeout = self.timeout

1088

2040

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

1089

# Emit D-Bus signal

1090

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

1091

dbus.UInt64(value, variant_level=1))

1092

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

1093

return

1094

# Reschedule timeout

1095

gobject.source_remove(self.disable_initiator_tag)

1096

self.disable_initiator_tag = None

1097

time_to_die = (self.

1098

_timedelta_to_milliseconds((self

1099

.last_checked_ok

1100

+ self.timeout)

1101

- datetime.datetime

1102

.utcnow()))

1103

if time_to_die <= 0:

1104

# The timeout has passed

1105

self.disable()

1106

else:

1107

self.disable_initiator_tag = (gobject.timeout_add

1108

(time_to_die, self.disable))

2041

# Reschedule disabling

2042

if self.enabled:

2043

now = datetime.datetime.utcnow()

2044

self.expires += self.timeout - old_timeout

2045

if self.expires <= now:

2046

# The timeout has passed

2047

self.disable()

2048

else:

2049

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

2050

is None):

2051

return

2052

GObject.source_remove(self.disable_initiator_tag)

2053

self.disable_initiator_tag = GObject.timeout_add(

2054

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

2055

self.disable)

2056

2057

# ExtendedTimeout - property

2058

@dbus_service_property(_interface,

2059

signature="t",

2060

access="readwrite")

2061

def ExtendedTimeout_dbus_property(self, value=None):

2062

if value is None: # get

2063

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

2064

* 1000)

2065

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

1109

2066

1110

2067

# Interval - property

1111

@dbus_service_property(_interface, signature="t",

2068

@dbus_service_property(_interface,

2069

signature="t",

1112

2070

access="readwrite")

1113

2071

def Interval_dbus_property(self, value=None):

1114

2072

if value is None: # get

1115

return dbus.UInt64(self.interval_milliseconds())

2073

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

1116

2074

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

1117

# Emit D-Bus signal

1118

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

1119

dbus.UInt64(value, variant_level=1))

1120

2075

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

1121

2076

return

1122

# Reschedule checker run

1123

gobject.source_remove(self.checker_initiator_tag)

1124

self.checker_initiator_tag = (gobject.timeout_add

1125

(value, self.start_checker))

1126

self.start_checker() # Start one now, too

1127

2077

if self.enabled:

2078

# Reschedule checker run

2079

GObject.source_remove(self.checker_initiator_tag)

2080

self.checker_initiator_tag = GObject.timeout_add(

2081

value, self.start_checker)

2082

self.start_checker() # Start one now, too

2083

1128

2084

# Checker - property

1129

@dbus_service_property(_interface, signature="s",

2085

@dbus_service_property(_interface,

2086

signature="s",

1130

2087

access="readwrite")

1131

2088

def Checker_dbus_property(self, value=None):

1132

2089

if value is None: # get

1133

2090

return dbus.String(self.checker_command)

1134

self.checker_command = value

1135

# Emit D-Bus signal

1136

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

1137

dbus.String(self.checker_command,

1138

variant_level=1))

2091

self.checker_command = str(value)

1139

2092

1140

2093

# CheckerRunning - property

1141

@dbus_service_property(_interface, signature="b",

2094

@dbus_service_property(_interface,

2095

signature="b",

1142

2096

access="readwrite")

1143

2097

def CheckerRunning_dbus_property(self, value=None):

1144

2098

if value is None: # get

1149

2103

self.stop_checker()

1150

2104

1151

2105

# ObjectPath - property

2106

@dbus_annotations(

2107

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

2108

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

1152

2109

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

1153

2110

def ObjectPath_dbus_property(self):

1154

2111

return self.dbus_object_path # is already a dbus.ObjectPath

1155

2112

1156

2113

# Secret = property

1157

@dbus_service_property(_interface, signature="ay",

1158

access="write", byte_arrays=True)

2114

@dbus_annotations(

2115

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

2116

"invalidates"})

2117

@dbus_service_property(_interface,

2118

signature="ay",

2119

access="write",

2120

byte_arrays=True)

1159

2121

def Secret_dbus_property(self, value):

1160

self.secret = str(value)

2122

self.secret = bytes(value)

1161

2123

1162

2124

del _interface

1163

2125

1167

2129

self._pipe = child_pipe

1168

2130

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

1169

2131

if not self._pipe.recv():

1170

raise KeyError()

1171

2132

raise KeyError(fpr)

2133

1172

2134

def __getattribute__(self, name):

1173

if(name == '_pipe'):

2135

if name == '_pipe':

1174

2136

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

1175

2137

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

1176

2138

data = self._pipe.recv()

1177

2139

if data[0] == 'data':

1178

2140

return data[1]

1179

2141

if data[0] == 'function':

2142

1180

2143

def func(*args, **kwargs):

1181

2144

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

1182

2145

return self._pipe.recv()[1]

2146

1183

2147

return func

1184

2148

1185

2149

def __setattr__(self, name, value):

1186

if(name == '_pipe'):

2150

if name == '_pipe':

1187

2151

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

1188

2152

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

1189

2153

1197

2161

def handle(self):

1198

2162

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

1199

2163

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

1200

unicode(self.client_address))

2164

str(self.client_address))

1201

2165

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

1202

2166

self.server.child_pipe.fileno())

1203

1204

session = (gnutls.connection

1205

.ClientSession(self.request,

1206

gnutls.connection

1207

.X509Credentials()))

1208

1209

# Note: gnutls.connection.X509Credentials is really a

1210

# generic GnuTLS certificate credentials object so long as

1211

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

1212

# here despite using OpenPGP certificates.

1213

2167

2168

session = gnutls.ClientSession(self.request)

2169

1214

2170

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

1215

2171

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

1216

2172

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

1219

2175

priority = self.server.gnutls_priority

1220

2176

if priority is None:

1221

2177

priority = "NORMAL"

1222

(gnutls.library.functions

1223

.gnutls_priority_set_direct(session._c_object,

1224

priority, None))

1225

2178

gnutls.priority_set_direct(session._c_object, priority,

2179

None)

2180

1226

2181

# Start communication using the Mandos protocol

1227

2182

# Get protocol number

1228

2183

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

1229

2184

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

1230

2185

try:

1231

2186

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

1232

raise RuntimeError

2187

raise RuntimeError(line)

1233

2188

except (ValueError, IndexError, RuntimeError) as error:

1234

2189

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

1235

2190

return

1236

2191

1237

2192

# Start GnuTLS connection

1238

2193

try:

1239

2194

session.handshake()

1240

except gnutls.errors.GNUTLSError as error:

2195

except gnutls.Error as error:

1241

2196

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

1242

2197

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

1243

2198

# established. Just abandon the request.

1244

2199

return

1245

2200

logger.debug("Handshake succeeded")

1246

2201

1247

2202

approval_required = False

1248

2203

try:

1249

2204

try:

1250

fpr = self.fingerprint(self.peer_certificate

1251

(session))

1252

except (TypeError,

1253

gnutls.errors.GNUTLSError) as error:

2205

fpr = self.fingerprint(

2206

self.peer_certificate(session))

2207

except (TypeError, gnutls.Error) as error:

1254

2208

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

1255

2209

return

1256

2210

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

1257

2211

1258

2212

try:

1259

2213

client = ProxyClient(child_pipe, fpr,

1260

2214

self.client_address)

1269

2223

while True:

1270

2224

if not client.enabled:

1271

2225

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

1272

client.name)

2226

client.name)

1273

2227

if self.server.use_dbus:

1274

2228

# Emit D-Bus signal

1275

client.Rejected("Disabled")

2229

client.Rejected("Disabled")

1276

2230

return

1277

2231

1278

if client._approved or not client.approval_delay:

2232

if client.approved or not client.approval_delay:

1279

2233

#We are approved or approval is disabled

1280

2234

break

1281

elif client._approved is None:

2235

elif client.approved is None:

1282

2236

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

1283

2237

client.name)

1284

2238

if self.server.use_dbus:

1285

2239

# Emit D-Bus signal

1286

2240

client.NeedApproval(

1287

client.approval_delay_milliseconds(),

1288

client.approved_by_default)

2241

client.approval_delay.total_seconds()

2242

* 1000, client.approved_by_default)

1289

2243

else:

1290

2244

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

1291

2245

client.name)

1295

2249

return

1296

2250

1297

2251

#wait until timeout or approved

1298

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

1299

2252

time = datetime.datetime.now()

1300

2253

client.changedstate.acquire()

1301

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

2254

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

1302

2255

client.changedstate.release()

1303

2256

time2 = datetime.datetime.now()

1304

2257

if (time2 - time) >= delay:

1315

2268

else:

1316

2269

delay -= time2 - time

1317

2270

1318

sent_size = 0

1319

while sent_size < len(client.secret):

1320

try:

1321

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

1322

except gnutls.errors.GNUTLSError as error:

1323

logger.warning("gnutls send failed")

1324

return

1325

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

1326

sent, len(client.secret)

1327

- (sent_size + sent))

1328

sent_size += sent

1329

2271

try:

2272

session.send(client.secret)

2273

except gnutls.Error as error:

2274

logger.warning("gnutls send failed",

2275

exc_info = error)

2276

return

2277

1330

2278

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

1331

# bump the timeout as if seen

1332

client.checked_ok()

2279

# bump the timeout using extended_timeout

2280

client.bump_timeout(client.extended_timeout)

1333

2281

if self.server.use_dbus:

1334

2282

# Emit D-Bus signal

1335

2283

client.GotSecret()

1339

2287

client.approvals_pending -= 1

1340

2288

try:

1341

2289

session.bye()

1342

except gnutls.errors.GNUTLSError as error:

1343

logger.warning("GnuTLS bye failed")

2290

except gnutls.Error as error:

2291

logger.warning("GnuTLS bye failed",

2292

exc_info=error)

1344

2293

1345

2294

@staticmethod

1346

2295

def peer_certificate(session):

1347

2296

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

1348

2297

# If not an OpenPGP certificate...

1349

if (gnutls.library.functions

1350

.gnutls_certificate_type_get(session._c_object)

1351

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1352

# ...do the normal thing

1353

return session.peer_certificate

2298

if (gnutls.certificate_type_get(session._c_object)

2299

!= gnutls.CRT_OPENPGP):

2300

# ...return invalid data

2301

return b""

1354

2302

list_size = ctypes.c_uint(1)

1355

cert_list = (gnutls.library.functions

1356

.gnutls_certificate_get_peers

2303

cert_list = (gnutls.certificate_get_peers

1357

2304

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

1358

2305

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

1359

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

1360

" certificate")

2306

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

1361

2307

if list_size.value == 0:

1362

2308

return None

1363

2309

cert = cert_list[0]

1367

2313

def fingerprint(openpgp):

1368

2314

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1369

2315

# New GnuTLS "datum" with the OpenPGP public key

1370

datum = (gnutls.library.types

1371

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

1372

ctypes.POINTER

1373

(ctypes.c_ubyte)),

1374

ctypes.c_uint(len(openpgp))))

2316

datum = gnutls.datum_t(

2317

ctypes.cast(ctypes.c_char_p(openpgp),

2318

ctypes.POINTER(ctypes.c_ubyte)),

2319

ctypes.c_uint(len(openpgp)))

1375

2320

# New empty GnuTLS certificate

1376

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1377

(gnutls.library.functions

1378

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2321

crt = gnutls.openpgp_crt_t()

2322

gnutls.openpgp_crt_init(ctypes.byref(crt))

1379

2323

# Import the OpenPGP public key into the certificate

1380

(gnutls.library.functions

1381

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

1382

gnutls.library.constants

1383

.GNUTLS_OPENPGP_FMT_RAW))

2324

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

2325

gnutls.OPENPGP_FMT_RAW)

1384

2326

# Verify the self signature in the key

1385

2327

crtverify = ctypes.c_uint()

1386

(gnutls.library.functions

1387

.gnutls_openpgp_crt_verify_self(crt, 0,

1388

ctypes.byref(crtverify)))

2328

gnutls.openpgp_crt_verify_self(crt, 0,

2329

ctypes.byref(crtverify))

1389

2330

if crtverify.value != 0:

1390

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1391

raise (gnutls.errors.CertificateSecurityError

1392

("Verify failed"))

2331

gnutls.openpgp_crt_deinit(crt)

2332

raise gnutls.CertificateSecurityError("Verify failed")

1393

2333

# New buffer for the fingerprint

1394

2334

buf = ctypes.create_string_buffer(20)

1395

2335

buf_len = ctypes.c_size_t()

1396

2336

# Get the fingerprint from the certificate into the buffer

1397

(gnutls.library.functions

1398

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

1399

ctypes.byref(buf_len)))

2337

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

2338

ctypes.byref(buf_len))

1400

2339

# Deinit the certificate

1401

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2340

gnutls.openpgp_crt_deinit(crt)

1402

2341

# Convert the buffer to a Python bytestring

1403

2342

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

1404

2343

# Convert the bytestring to hexadecimal notation

1405

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

2344

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

1406

2345

return hex_fpr

1407

2346

1408

2347

1409

2348

class MultiprocessingMixIn(object):

1410

2349

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

2350

1411

2351

def sub_process_main(self, request, address):

1412

2352

try:

1413

2353

self.finish_request(request, address)

1414

except:

2354

except Exception:

1415

2355

self.handle_error(request, address)

1416

2356

self.close_request(request)

1417

2357

1418

2358

def process_request(self, request, address):

1419

2359

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

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

2360

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

2361

args = (request, address))

2362

proc.start()

2363

return proc

2364

1422

2365

1423

2366

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1424

2367

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

2368

1425

2369

def process_request(self, request, client_address):

1426

2370

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

1427

2371

1428

2372

This function creates a new pipe in self.pipe

1429

2373

"""

1430

2374

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

2375

2376

proc = MultiprocessingMixIn.process_request(self, request,

2377

client_address)

1434

2378

self.child_pipe.close()

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

2379

self.add_pipe(parent_pipe, proc)

2380

2381

def add_pipe(self, parent_pipe, proc):

1438

2382

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

1439

raise NotImplementedError

2383

raise NotImplementedError()

2384

1440

2385

1441

2386

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1442

2387

socketserver.TCPServer, object):

1447

2392

interface: None or a network interface name (string)

1448

2393

use_ipv6: Boolean; to use IPv6 or not

1449

2394

"""

2395

1450

2396

def __init__(self, server_address, RequestHandlerClass,

1451

interface=None, use_ipv6=True):

2397

interface=None,

2398

use_ipv6=True,

2399

socketfd=None):

2400

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

2401

creating a new one with socket.socket().

2402

"""

1452

2403

self.interface = interface

1453

2404

if use_ipv6:

1454

2405

self.address_family = socket.AF_INET6

2406

if socketfd is not None:

2407

# Save the file descriptor

2408

self.socketfd = socketfd

2409

# Save the original socket.socket() function

2410

self.socket_socket = socket.socket

2411

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

2412

#

2413

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

2414

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

2415

# patching socket.socket.)

2416

#

2417

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

2418

@functools.wraps(socket.socket)

2419

def socket_wrapper(*args, **kwargs):

2420

# Restore original function so subsequent calls are

2421

# not affected.

2422

socket.socket = self.socket_socket

2423

del self.socket_socket

2424

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

2425

# saved file descriptor.

2426

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

2427

# Replace socket.socket() function with wrapper

2428

socket.socket = socket_wrapper

2429

# The socketserver.TCPServer.__init__ will call

2430

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

2431

# socket_wrapper(), if socketfd was set.

1455

2432

socketserver.TCPServer.__init__(self, server_address,

1456

2433

RequestHandlerClass)

2434

1457

2435

def server_bind(self):

1458

2436

"""This overrides the normal server_bind() function

1459

2437

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

1465

2443

self.interface)

1466

2444

else:

1467

2445

try:

1468

self.socket.setsockopt(socket.SOL_SOCKET,

1469

SO_BINDTODEVICE,

1470

str(self.interface

1471

+ '\0'))

2446

self.socket.setsockopt(

2447

socket.SOL_SOCKET, SO_BINDTODEVICE,

2448

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

1472

2449

except socket.error as error:

1473

if error[0] == errno.EPERM:

1474

logger.error("No permission to"

1475

" bind to interface %s",

1476

self.interface)

1477

elif error[0] == errno.ENOPROTOOPT:

2450

if error.errno == errno.EPERM:

2451

logger.error("No permission to bind to"

2452

" interface %s", self.interface)

2453

elif error.errno == errno.ENOPROTOOPT:

1478

2454

logger.error("SO_BINDTODEVICE not available;"

1479

2455

" cannot bind to interface %s",

1480

2456

self.interface)

2457

elif error.errno == errno.ENODEV:

2458

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

2459

" cannot bind", self.interface)

1481

2460

else:

1482

2461

raise

1483

2462

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

1486

2465

if self.address_family == socket.AF_INET6:

1487

2466

any_address = "::" # in6addr_any

1488

2467

else:

1489

any_address = socket.INADDR_ANY

2468

any_address = "0.0.0.0" # INADDR_ANY

1490

2469

self.server_address = (any_address,

1491

2470

self.server_address[1])

1492

2471

elif not self.server_address[1]:

1493

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

1494

0)

2472

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

1495

2473

# if self.interface:

1496

2474

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

1497

2475

# 0, # port

1509

2487

gnutls_priority GnuTLS priority string

1510

2488

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

1511

2489

1512

Assumes a gobject.MainLoop event loop.

2490

Assumes a GObject.MainLoop event loop.

1513

2491

"""

2492

1514

2493

def __init__(self, server_address, RequestHandlerClass,

1515

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

1516

gnutls_priority=None, use_dbus=True):

2494

interface=None,

2495

use_ipv6=True,

2496

clients=None,

2497

gnutls_priority=None,

2498

use_dbus=True,

2499

socketfd=None):

1517

2500

self.enabled = False

1518

2501

self.clients = clients

1519

2502

if self.clients is None:

1520

self.clients = set()

2503

self.clients = {}

1521

2504

self.use_dbus = use_dbus

1522

2505

self.gnutls_priority = gnutls_priority

1523

2506

IPv6_TCPServer.__init__(self, server_address,

1524

2507

RequestHandlerClass,

1525

2508

interface = interface,

1526

use_ipv6 = use_ipv6)

2509

use_ipv6 = use_ipv6,

2510

socketfd = socketfd)

2511

1527

2512

def server_activate(self):

1528

2513

if self.enabled:

1529

2514

return socketserver.TCPServer.server_activate(self)

2515

1530

2516

def enable(self):

1531

2517

self.enabled = True

1532

def add_pipe(self, parent_pipe):

2518

2519

def add_pipe(self, parent_pipe, proc):

1533

2520

# Call "handle_ipc" for both data and EOF events

1534

gobject.io_add_watch(parent_pipe.fileno(),

1535

gobject.IO_IN | gobject.IO_HUP,

1536

functools.partial(self.handle_ipc,

1537

parent_pipe = parent_pipe))

1538

1539

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

2521

GObject.io_add_watch(

2522

parent_pipe.fileno(),

2523

GObject.IO_IN | GObject.IO_HUP,

2524

functools.partial(self.handle_ipc,

2525

parent_pipe = parent_pipe,

2526

proc = proc))

2527

2528

def handle_ipc(self, source, condition,

2529

parent_pipe=None,

2530

proc = None,

1540

2531

client_object=None):

1541

condition_names = {

1542

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

1543

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

1544

# blocking).

1545

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

1546

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

1547

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

1548

# broken, usually for pipes and

1549

# sockets).

1550

}

1551

conditions_string = ' | '.join(name

1552

for cond, name in

1553

condition_names.iteritems()

1554

if cond & condition)

1555

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

1556

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

2532

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

2533

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

2534

# Wait for other process to exit

2535

proc.join()

1557

2536

return False

1558

2537

1559

2538

# Read a request from the child

1564

2543

fpr = request[1]

1565

2544

address = request[2]

1566

2545

1567

for c in self.clients:

2546

for c in self.clients.values():

1568

2547

if c.fingerprint == fpr:

1569

2548

client = c

1570

2549

break

1573

2552

"dress: %s", fpr, address)

1574

2553

if self.use_dbus:

1575

2554

# Emit D-Bus signal

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

2555

mandos_dbus_service.ClientNotFound(fpr,

2556

address[0])

1577

2557

parent_pipe.send(False)

1578

2558

return False

1579

2559

1580

gobject.io_add_watch(parent_pipe.fileno(),

1581

gobject.IO_IN | gobject.IO_HUP,

1582

functools.partial(self.handle_ipc,

1583

parent_pipe = parent_pipe,

1584

client_object = client))

2560

GObject.io_add_watch(

2561

parent_pipe.fileno(),

2562

GObject.IO_IN | GObject.IO_HUP,

2563

functools.partial(self.handle_ipc,

2564

parent_pipe = parent_pipe,

2565

proc = proc,

2566

client_object = client))

1585

2567

parent_pipe.send(True)

1586

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

2568

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

2569

# same fileno

1587

2570

return False

1588

2571

if command == 'funcall':

1589

2572

funcname = request[1]

1590

2573

args = request[2]

1591

2574

kwargs = request[3]

1592

2575

1593

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

1594

2576

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

2577

funcname)(*args,

2578

**kwargs)))

2579

1595

2580

if command == 'getattr':

1596

2581

attrname = request[1]

1597

if callable(client_object.__getattribute__(attrname)):

1598

parent_pipe.send(('function',))

2582

if isinstance(client_object.__getattribute__(attrname),

2583

collections.Callable):

2584

parent_pipe.send(('function', ))

1599

2585

else:

1600

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

2586

parent_pipe.send((

2587

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

1601

2588

1602

2589

if command == 'setattr':

1603

2590

attrname = request[1]

1604

2591

value = request[2]

1605

2592

setattr(client_object, attrname, value)

1606

2593

1607

2594

return True

1608

2595

1609

2596

2597

def rfc3339_duration_to_delta(duration):

2598

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

2599

2600

>>> rfc3339_duration_to_delta("P7D")

2601

datetime.timedelta(7)

2602

>>> rfc3339_duration_to_delta("PT60S")

2603

datetime.timedelta(0, 60)

2604

>>> rfc3339_duration_to_delta("PT60M")

2605

datetime.timedelta(0, 3600)

2606

>>> rfc3339_duration_to_delta("PT24H")

2607

datetime.timedelta(1)

2608

>>> rfc3339_duration_to_delta("P1W")

2609

datetime.timedelta(7)

2610

>>> rfc3339_duration_to_delta("PT5M30S")

2611

datetime.timedelta(0, 330)

2612

>>> rfc3339_duration_to_delta("P1DT3M20S")

2613

datetime.timedelta(1, 200)

2614

"""

2615

2616

# Parsing an RFC 3339 duration with regular expressions is not

2617

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

2618

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

2619

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

2620

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

2621

# avoid excessive use of external libraries.

2622

2623

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

2624

Token = collections.namedtuple("Token", (

2625

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

2626

# a "group" containing digits

2627

"value", # datetime.timedelta or None

2628

"followers")) # Tokens valid after this token

2629

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

2630

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

2631

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

2632

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

2633

datetime.timedelta(seconds=1),

2634

frozenset((token_end, )))

2635

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

2636

datetime.timedelta(minutes=1),

2637

frozenset((token_second, token_end)))

2638

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

2639

datetime.timedelta(hours=1),

2640

frozenset((token_minute, token_end)))

2641

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

2642

None,

2643

frozenset((token_hour, token_minute,

2644

token_second)))

2645

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

2646

datetime.timedelta(days=1),

2647

frozenset((token_time, token_end)))

2648

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

2649

datetime.timedelta(weeks=4),

2650

frozenset((token_day, token_end)))

2651

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

2652

datetime.timedelta(weeks=52),

2653

frozenset((token_month, token_end)))

2654

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

2655

datetime.timedelta(weeks=1),

2656

frozenset((token_end, )))

2657

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

2658

frozenset((token_year, token_month,

2659

token_day, token_time,

2660

token_week)))

2661

# Define starting values

2662

value = datetime.timedelta() # Value so far

2663

found_token = None

2664

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

2665

s = duration # String left to parse

2666

# Loop until end token is found

2667

while found_token is not token_end:

2668

# Search for any currently valid tokens

2669

for token in followers:

2670

match = token.regexp.match(s)

2671

if match is not None:

2672

# Token found

2673

if token.value is not None:

2674

# Value found, parse digits

2675

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

2676

# Add to value so far

2677

value += factor * token.value

2678

# Strip token from string

2679

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

2680

# Go to found token

2681

found_token = token

2682

# Set valid next tokens

2683

followers = found_token.followers

2684

break

2685

else:

2686

# No currently valid tokens were found

2687

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

2688

.format(duration))

2689

# End token found

2690

return value

2691

2692

1610

2693

def string_to_delta(interval):

1611

2694

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

1612

2695

1623

2706

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

1624

2707

datetime.timedelta(0, 330)

1625

2708

"""

2709

2710

try:

2711

return rfc3339_duration_to_delta(interval)

2712

except ValueError:

2713

pass

2714

1626

2715

timevalue = datetime.timedelta(0)

1627

2716

for s in interval.split():

1628

2717

try:

1629

suffix = unicode(s[-1])

2718

suffix = s[-1]

1630

2719

value = int(s[:-1])

1631

2720

if suffix == "d":

1632

2721

delta = datetime.timedelta(value)

1639

2728

elif suffix == "w":

1640

2729

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

1641

2730

else:

1642

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

1643

except (ValueError, IndexError) as e:

2731

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

2732

except IndexError as e:

1644

2733

raise ValueError(*(e.args))

1645

2734

timevalue += delta

1646

2735

return timevalue

1647

2736

1648

2737

1649

def if_nametoindex(interface):

1650

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

1651

1652

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

1653

global if_nametoindex

1654

try:

1655

if_nametoindex = (ctypes.cdll.LoadLibrary

1656

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

1657

.if_nametoindex)

1658

except (OSError, AttributeError):

1659

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

1660

def if_nametoindex(interface):

1661

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

1662

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

1663

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

1664

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1665

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

1666

interface))

1667

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

1668

ifreq[16:20])[0]

1669

return interface_index

1670

return if_nametoindex(interface)

1671

1672

1673

2738

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

1674

2739

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

1675

2740

1683

2748

sys.exit()

1684

2749

if not noclose:

1685

2750

# Close all standard open file descriptors

1686

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

2751

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

1687

2752

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

1688

2753

raise OSError(errno.ENODEV,

1689

"%s not a character device"

1690

% os.path.devnull)

2754

"{} not a character device"

2755

.format(os.devnull))

1691

2756

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

1692

2757

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

1693

2758

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

1702

2767

1703

2768

parser = argparse.ArgumentParser()

1704

2769

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

1705

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

2770

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

1706

2771

help="show version number and exit")

1707

2772

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

1708

2773

help="Bind to interface IF")

1714

2779

help="Run self-test")

1715

2780

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

1716

2781

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

1717

" to terminal")

2782

" to terminal", default=None)

1718

2783

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

1719

2784

help="Debug level for stdout output")

1720

2785

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

1727

2792

" files")

1728

2793

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

1729

2794

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

1730

" system bus interface")

2795

" system bus interface", default=None)

1731

2796

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

1732

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

2797

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

2798

default=None)

2799

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

2800

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

2801

" state", default=None)

2802

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

2803

help="Specify a file descriptor to a network"

2804

" socket to use instead of creating one")

2805

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

2806

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

2807

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

2808

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

2809

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

2810

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

2811

default=None)

2812

1733

2813

options = parser.parse_args()

1734

2814

1735

2815

if options.check:

1736

2816

import doctest

1737

doctest.testmod()

1738

sys.exit()

2817

fail_count, test_count = doctest.testmod()

2818

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

1739

2819

1740

2820

# Default values for config file for server-global settings

1741

2821

server_defaults = { "interface": "",

1743

2823

"port": "",

1744

2824

"debug": "False",

1745

2825

"priority":

1746

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

2826

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

2827

":+SIGN-DSA-SHA256",

1747

2828

"servicename": "Mandos",

1748

2829

"use_dbus": "True",

1749

2830

"use_ipv6": "True",

1750

2831

"debuglevel": "",

1751

}

2832

"restore": "True",

2833

"socket": "",

2834

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

2835

"foreground": "False",

2836

"zeroconf": "True",

2837

}

1752

2838

1753

2839

# Parse config file for server-global settings

1754

2840

server_config = configparser.SafeConfigParser(server_defaults)

1755

2841

del server_defaults

1756

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

1757

"mandos.conf"))

2842

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

1758

2843

# Convert the SafeConfigParser object to a dict

1759

2844

server_settings = server_config.defaults()

1760

2845

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

1761

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

2846

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

1762

2847

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

1763

2848

option)

1764

2849

if server_settings["port"]:

1765

2850

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

1766

2851

"port")

2852

if server_settings["socket"]:

2853

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

2854

"socket")

2855

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

2856

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

2857

# happen with a supplied network socket.

2858

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

2859

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

2860

["socket"])

1767

2861

del server_config

1768

2862

1769

2863

# Override the settings from the config file with command line

1770

2864

# options, if set.

1771

2865

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

1772

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

1773

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

2866

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

2867

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

2868

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

1774

2869

value = getattr(options, option)

1775

2870

if value is not None:

1776

2871

server_settings[option] = value

1777

2872

del options

1778

2873

# Force all strings to be unicode

1779

2874

for option in server_settings.keys():

1780

if type(server_settings[option]) is str:

1781

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

2875

if isinstance(server_settings[option], bytes):

2876

server_settings[option] = (server_settings[option]

2877

.decode("utf-8"))

2878

# Force all boolean options to be boolean

2879

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

2880

"foreground", "zeroconf"):

2881

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

2882

# Debug implies foreground

2883

if server_settings["debug"]:

2884

server_settings["foreground"] = True

1782

2885

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

1783

2886

1784

2887

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

1785

2888

2889

if (not server_settings["zeroconf"]

2890

and not (server_settings["port"]

2891

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

2892

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

2893

1786

2894

# For convenience

1787

2895

debug = server_settings["debug"]

1788

2896

debuglevel = server_settings["debuglevel"]

1789

2897

use_dbus = server_settings["use_dbus"]

1790

2898

use_ipv6 = server_settings["use_ipv6"]

1791

2899

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

2900

stored_state_file)

2901

foreground = server_settings["foreground"]

2902

zeroconf = server_settings["zeroconf"]

2903

2904

if debug:

2905

initlogger(debug, logging.DEBUG)

2906

else:

2907

if not debuglevel:

2908

initlogger(debug)

2909

else:

2910

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

2911

initlogger(debug, level)

2912

1792

2913

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

1793

syslogger.setFormatter(logging.Formatter

1794

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

1795

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

1796

% server_settings["servicename"]))

2914

syslogger.setFormatter(

2915

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

2916

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

2917

server_settings["servicename"])))

1797

2918

1798

2919

# Parse config file with clients

1799

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

1800

"interval": "5m",

1801

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

1802

"host": "",

1803

"approval_delay": "0s",

1804

"approval_duration": "1s",

1805

}

1806

client_config = configparser.SafeConfigParser(client_defaults)

2920

client_config = configparser.SafeConfigParser(Client

2921

.client_defaults)

1807

2922

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

1808

2923

"clients.conf"))

1809

2924

1810

2925

global mandos_dbus_service

1811

2926

mandos_dbus_service = None

1812

2927

1813

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

1814

server_settings["port"]),

1815

ClientHandler,

1816

interface=(server_settings["interface"]

1817

or None),

1818

use_ipv6=use_ipv6,

1819

gnutls_priority=

1820

server_settings["priority"],

1821

use_dbus=use_dbus)

1822

if not debug:

1823

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

2928

socketfd = None

2929

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

2930

socketfd = server_settings["socket"]

2931

tcp_server = MandosServer(

2932

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

2933

ClientHandler,

2934

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

2935

use_ipv6=use_ipv6,

2936

gnutls_priority=server_settings["priority"],

2937

use_dbus=use_dbus,

2938

socketfd=socketfd)

2939

if not foreground:

2940

pidfilename = "/run/mandos.pid"

2941

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

2942

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

2943

pidfile = None

1824

2944

try:

1825

pidfile = open(pidfilename, "w")

1826

except IOError:

1827

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

2945

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

2946

except IOError as e:

2947

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

2948

exc_info=e)

1828

2949

1829

try:

1830

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

1831

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

1832

except KeyError:

2950

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

2951

("mandos", "mandos"),

2952

("nobody", "nogroup")):

1833

2953

try:

1834

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

1835

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

2954

uid = pwd.getpwnam(name).pw_uid

2955

gid = pwd.getpwnam(group).pw_gid

2956

break

1836

2957

except KeyError:

1837

try:

1838

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

1839

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

1840

except KeyError:

1841

uid = 65534

1842

gid = 65534

2958

continue

2959

else:

2960

uid = 65534

2961

gid = 65534

1843

2962

try:

1844

2963

os.setgid(gid)

1845

2964

os.setuid(uid)

2965

if debug:

2966

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

2967

gid))

1846

2968

except OSError as error:

1847

if error[0] != errno.EPERM:

1848

raise error

2969

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

2970

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

2971

if error.errno != errno.EPERM:

2972

raise

1849

2973

1850

if not debug and not debuglevel:

1851

syslogger.setLevel(logging.WARNING)

1852

console.setLevel(logging.WARNING)

1853

if debuglevel:

1854

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

1855

syslogger.setLevel(level)

1856

console.setLevel(level)

1857

1858

2974

if debug:

1859

2975

# Enable all possible GnuTLS debugging

1860

2976

1861

2977

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

1862

2978

# - GnuTLS manual

1863

gnutls.library.functions.gnutls_global_set_log_level(11)

2979

gnutls.global_set_log_level(11)

1864

2980

1865

@gnutls.library.types.gnutls_log_func

2981

@gnutls.log_func

1866

2982

def debug_gnutls(level, string):

1867

2983

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

1868

2984

1869

(gnutls.library.functions

1870

.gnutls_global_set_log_function(debug_gnutls))

2985

gnutls.global_set_log_function(debug_gnutls)

1871

2986

1872

2987

# Redirect stdin so all checkers get /dev/null

1873

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

2988

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

1874

2989

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

1875

2990

if null > 2:

1876

2991

os.close(null)

1877

else:

1878

# No console logging

1879

logger.removeHandler(console)

1880

2992

1881

2993

# Need to fork before connecting to D-Bus

1882

if not debug:

2994

if not foreground:

1883

2995

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

1884

2996

daemon()

1885

2997

2998

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

2999

# need to inform GObject that threads will be used.

3000

GObject.threads_init()

3001

1886

3002

global main_loop

1887

3003

# From the Avahi example code

1888

DBusGMainLoop(set_as_default=True )

1889

main_loop = gobject.MainLoop()

3004

DBusGMainLoop(set_as_default=True)

3005

main_loop = GObject.MainLoop()

1890

3006

bus = dbus.SystemBus()

1891

3007

# End of Avahi example code

1892

3008

if use_dbus:

1893

3009

try:

1894

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

1895

bus, do_not_queue=True)

1896

except dbus.exceptions.NameExistsException as e:

1897

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

3010

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

3011

bus,

3012

do_not_queue=True)

3013

old_bus_name = dbus.service.BusName(

3014

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

3015

do_not_queue=True)

3016

except dbus.exceptions.DBusException as e:

3017

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

1898

3018

use_dbus = False

1899

3019

server_settings["use_dbus"] = False

1900

3020

tcp_server.use_dbus = False

1901

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1902

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

1903

servicetype = "_mandos._tcp",

1904

protocol = protocol, bus = bus)

1905

if server_settings["interface"]:

1906

service.interface = (if_nametoindex

1907

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

3021

if zeroconf:

3022

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3023

service = AvahiServiceToSyslog(

3024

name = server_settings["servicename"],

3025

servicetype = "_mandos._tcp",

3026

protocol = protocol,

3027

bus = bus)

3028

if server_settings["interface"]:

3029

service.interface = if_nametoindex(

3030

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

1908

3031

1909

3032

global multiprocessing_manager

1910

3033

multiprocessing_manager = multiprocessing.Manager()

1912

3035

client_class = Client

1913

3036

if use_dbus:

1914

3037

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

1915

def client_config_items(config, section):

1916

special_settings = {

1917

"approved_by_default":

1918

lambda: config.getboolean(section,

1919

"approved_by_default"),

1920

}

1921

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

3038

3039

client_settings = Client.config_parser(client_config)

3040

old_client_settings = {}

3041

clients_data = {}

3042

3043

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

3044

global wnull

3045

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

3046

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

3047

# mode

3048

if debug or not foreground:

3049

wnull.close()

3050

3051

# Get client data and settings from last running state.

3052

if server_settings["restore"]:

3053

try:

3054

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

3055

if sys.version_info.major == 2:

3056

clients_data, old_client_settings = pickle.load(

3057

stored_state)

3058

else:

3059

bytes_clients_data, bytes_old_client_settings = (

3060

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

3061

### Fix bytes to strings

3062

## clients_data

3063

# .keys()

3064

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

3065

if isinstance(key, bytes)

3066

else key): value

3067

for key, value in

3068

bytes_clients_data.items() }

3069

del bytes_clients_data

3070

for key in clients_data:

3071

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

3072

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

3073

for k, v in

3074

clients_data[key].items() }

3075

clients_data[key] = value

3076

# .client_structure

3077

value["client_structure"] = [

3078

(s.decode("utf-8")

3079

if isinstance(s, bytes)

3080

else s) for s in

3081

value["client_structure"] ]

3082

# .name & .host

3083

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

3084

if isinstance(value[k], bytes):

3085

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

3086

## old_client_settings

3087

# .keys()

3088

old_client_settings = {

3089

(key.decode("utf-8")

3090

if isinstance(key, bytes)

3091

else key): value

3092

for key, value in

3093

bytes_old_client_settings.items() }

3094

del bytes_old_client_settings

3095

# .host

3096

for value in old_client_settings.values():

3097

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

3098

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

3099

.decode("utf-8"))

3100

os.remove(stored_state_path)

3101

except IOError as e:

3102

if e.errno == errno.ENOENT:

3103

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

3104

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

3105

else:

3106

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

3107

exc_info=e)

3108

raise

3109

except EOFError as e:

3110

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

3111

"EOFError:",

3112

exc_info=e)

3113

3114

with PGPEngine() as pgp:

3115

for client_name, client in clients_data.items():

3116

# Skip removed clients

3117

if client_name not in client_settings:

3118

continue

3119

3120

# Decide which value to use after restoring saved state.

3121

# We have three different values: Old config file,

3122

# new config file, and saved state.

3123

# New config value takes precedence if it differs from old

3124

# config value, otherwise use saved state.

3125

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

3126

try:

3127

# For each value in new config, check if it

3128

# differs from the old config value (Except for

3129

# the "secret" attribute)

3130

if (name != "secret"

3131

and (value !=

3132

old_client_settings[client_name][name])):

3133

client[name] = value

3134

except KeyError:

3135

pass

3136

3137

# Clients who has passed its expire date can still be

3138

# enabled if its last checker was successful. A Client

3139

# whose checker succeeded before we stored its state is

3140

# assumed to have successfully run all checkers during

3141

# downtime.

3142

if client["enabled"]:

3143

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

3144

if not client["last_checked_ok"]:

3145

logger.warning(

3146

"disabling client {} - Client never "

3147

"performed a successful checker".format(

3148

client_name))

3149

client["enabled"] = False

3150

elif client["last_checker_status"] != 0:

3151

logger.warning(

3152

"disabling client {} - Client last"

3153

" checker failed with error code"

3154

" {}".format(

3155

client_name,

3156

client["last_checker_status"]))

3157

client["enabled"] = False

3158

else:

3159

client["expires"] = (

3160

datetime.datetime.utcnow()

3161

+ client["timeout"])

3162

logger.debug("Last checker succeeded,"

3163

" keeping {} enabled".format(

3164

client_name))

1922

3165

try:

1923

yield (name, special_settings[name]())

1924

except KeyError:

1925

yield (name, value)

1926

1927

tcp_server.clients.update(set(

1928

client_class(name = section,

1929

config= dict(client_config_items(

1930

client_config, section)))

1931

for section in client_config.sections()))

3166

client["secret"] = pgp.decrypt(

3167

client["encrypted_secret"],

3168

client_settings[client_name]["secret"])

3169

except PGPError:

3170

# If decryption fails, we use secret from new settings

3171

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

3172

client_name))

3173

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

3174

["secret"])

3175

3176

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

3177

for client_name in (set(old_client_settings)

3178

- set(client_settings)):

3179

del clients_data[client_name]

3180

for client_name in (set(client_settings)

3181

- set(old_client_settings)):

3182

clients_data[client_name] = client_settings[client_name]

3183

3184

# Create all client objects

3185

for client_name, client in clients_data.items():

3186

tcp_server.clients[client_name] = client_class(

3187

name = client_name,

3188

settings = client,

3189

server_settings = server_settings)

3190

1932

3191

if not tcp_server.clients:

1933

3192

logger.warning("No clients defined")

1934

1935

if not debug:

1936

try:

1937

with pidfile:

1938

pid = os.getpid()

1939

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

1940

del pidfile

1941

except IOError:

1942

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

1943

pidfilename, pid)

1944

except NameError:

1945

# "pidfile" was never created

1946

pass

3193

3194

if not foreground:

3195

if pidfile is not None:

3196

pid = os.getpid()

3197

try:

3198

with pidfile:

3199

print(pid, file=pidfile)

3200

except IOError:

3201

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

3202

pidfilename, pid)

3203

del pidfile

1947

3204

del pidfilename

1948

1949

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

1950

3205

1951

3206

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

1952

3207

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

1953

3208

1954

3209

if use_dbus:

1955

class MandosDBusService(dbus.service.Object):

3210

3211

@alternate_dbus_interfaces(

3212

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

3213

class MandosDBusService(DBusObjectWithObjectManager):

1956

3214

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

3215

1957

3216

def __init__(self):

1958

3217

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

1959

_interface = "se.bsnet.fukt.Mandos"

3218

3219

_interface = "se.recompile.Mandos"

1960

3220

1961

3221

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

1962

3222

def ClientAdded(self, objpath):

1968

3228

"D-Bus signal"

1969

3229

pass

1970

3230

3231

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

3232

"true"})

1971

3233

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

1972

3234

def ClientRemoved(self, objpath, name):

1973

3235

"D-Bus signal"

1974

3236

pass

1975

3237

3238

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

3239

"true"})

1976

3240

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

1977

3241

def GetAllClients(self):

1978

3242

"D-Bus method"

1979

return dbus.Array(c.dbus_object_path

1980

for c in tcp_server.clients)

3243

return dbus.Array(c.dbus_object_path for c in

3244

tcp_server.clients.values())

1981

3245

3246

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

3247

"true"})

1982

3248

@dbus.service.method(_interface,

1983

3249

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

1984

3250

def GetAllClientsWithProperties(self):

1985

3251

"D-Bus method"

1986

3252

return dbus.Dictionary(

1987

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

1988

for c in tcp_server.clients),

3253

{ c.dbus_object_path: c.GetAll(

3254

"se.recompile.Mandos.Client")

3255

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

1989

3256

signature="oa{sv}")

1990

3257

1991

3258

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

1992

3259

def RemoveClient(self, object_path):

1993

3260

"D-Bus method"

1994

for c in tcp_server.clients:

3261

for c in tcp_server.clients.values():

1995

3262

if c.dbus_object_path == object_path:

1996

tcp_server.clients.remove(c)

3263

del tcp_server.clients[c.name]

1997

3264

c.remove_from_connection()

1998

# Don't signal anything except ClientRemoved

3265

# Don't signal the disabling

1999

3266

c.disable(quiet=True)

2000

# Emit D-Bus signal

2001

self.ClientRemoved(object_path, c.name)

3267

# Emit D-Bus signal for removal

3268

self.client_removed_signal(c)

2002

3269

return

2003

3270

raise KeyError(object_path)

2004

3271

2005

3272

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)

2006

3309

2007

3310

mandos_dbus_service = MandosDBusService()

2008

3311

2009

3312

def cleanup():

2010

3313

"Cleanup function; run on exit"

2011

service.cleanup()

2012

3314

if zeroconf:

3315

service.cleanup()

3316

3317

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

2013

3376

while tcp_server.clients:

2014

client = tcp_server.clients.pop()

3377

name, client = tcp_server.clients.popitem()

2015

3378

if use_dbus:

2016

3379

client.remove_from_connection()

2017

client.disable_hook = None

2018

# Don't signal anything except ClientRemoved

3380

# Don't signal the disabling

2019

3381

client.disable(quiet=True)

3382

# Emit D-Bus signal for removal

2020

3383

if use_dbus:

2021

# Emit D-Bus signal

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2023

client.name)

3384

mandos_dbus_service.client_removed_signal(client)

3385

client_settings.clear()

2024

3386

2025

3387

atexit.register(cleanup)

2026

3388

2027

for client in tcp_server.clients:

3389

for client in tcp_server.clients.values():

2028

3390

if use_dbus:

2029

# Emit D-Bus signal

2030

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2031

client.enable()

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()

2032

3396

2033

3397

tcp_server.enable()

2034

3398

tcp_server.server_activate()

2035

3399

2036

3400

# Find out what port we got

2037

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

3401

if zeroconf:

3402

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

2038

3403

if use_ipv6:

2039

3404

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

2040

" flowinfo %d, scope_id %d"

2041

% tcp_server.socket.getsockname())

3405

" flowinfo %d, scope_id %d",

3406

*tcp_server.socket.getsockname())

2042

3407

else: # IPv4

2043

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

2044

% tcp_server.socket.getsockname())

3408

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

3409

*tcp_server.socket.getsockname())

2045

3410

2046

3411

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

2047

3412

2048

3413

try:

2049

# From the Avahi example code

2050

try:

2051

service.activate()

2052

except dbus.exceptions.DBusException as error:

2053

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

2054

cleanup()

2055

sys.exit(1)

2056

# End of Avahi example code

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

2057

3423

2058

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

3424

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

2059

3425

lambda *args, **kwargs:

2060

3426

(tcp_server.handle_request

2061

3427

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

2063

3429

logger.debug("Starting main loop")

2064

3430

main_loop.run()

2065

3431

except AvahiError as error:

2066

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

3432

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

2067

3433

cleanup()

2068

3434

sys.exit(1)

2069

3435

except KeyboardInterrupt:

2074

3440

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

2075

3441

cleanup()

2076

3442

3443

2077

3444

if __name__ == '__main__':

2078

3445

main()