/mandos/trunk : revision 491

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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try:

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from future_builtins import *

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except ImportError:

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pass

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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try:

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from gi.repository import GObject

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except ImportError:

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import gobject as GObject

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.5"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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self.value = value

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

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**kwargs)

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

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

137

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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

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self.name)

358

if remove:

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self.remove()

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

169

self.remove()

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170

try:

361

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self.add()

362

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except dbus.exceptions.DBusException as error:

363

if (error.get_dbus_name()

364

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

365

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

366

return self.rename(remove=False)

367

else:

368

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

369

self.cleanup()

370

os._exit(1)

371

173

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

174

self.cleanup()

175

os._exit(1)

176

self.rename_count += 1

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def remove(self):

373

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

374

179

if self.entry_group_state_changed_match is not None:

376

181

self.entry_group_state_changed_match = None

377

182

if self.group is not None:

378

183

self.group.Reset()

379

380

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def add(self):

381

185

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

382

186

self.remove()

387

191

avahi.DBUS_INTERFACE_ENTRY_GROUP)

388

192

self.entry_group_state_changed_match = (

389

193

self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

194

'StateChanged', self .entry_group_state_changed))

391

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

392

196

self.name, self.type)

393

197

self.group.AddService(

399

203

dbus.UInt16(self.port),

400

204

avahi.string_array_to_txt_array(self.TXT))

401

205

self.group.Commit()

402

403

206

def entry_group_state_changed(self, state, error):

404

207

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

405

208

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

411

214

self.rename()

412

215

elif state == avahi.ENTRY_GROUP_FAILURE:

413

216

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

414

str(error))

415

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

416

217

unicode(error))

218

raise AvahiGroupError("State changed: %s"

219

% unicode(error))

417

220

def cleanup(self):

418

221

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

419

222

if self.group is not None:

420

223

try:

421

224

self.group.Free()

422

225

except (dbus.exceptions.UnknownMethodException,

423

dbus.exceptions.DBusException):

226

dbus.exceptions.DBusException) as e:

424

227

pass

425

228

self.group = None

426

229

self.remove()

427

428

230

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

429

231

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

430

232

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

431

bad_states = {

432

avahi.SERVER_INVALID: "Zeroconf server invalid",

433

avahi.SERVER_REGISTERING: None,

434

avahi.SERVER_COLLISION: "Zeroconf server name collision",

435

avahi.SERVER_FAILURE: "Zeroconf server failure",

436

}

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:

239

"Zeroconf server failure" }

437

240

if state in bad_states:

438

241

if bad_states[state] is not None:

439

242

if error is None:

442

245

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

443

246

self.cleanup()

444

247

elif state == avahi.SERVER_RUNNING:

445

try:

446

self.add()

447

except dbus.exceptions.DBusException as error:

448

if (error.get_dbus_name()

449

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

450

logger.info("Local Zeroconf service name"

451

" collision.")

452

return self.rename(remove=False)

453

else:

454

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

455

self.cleanup()

456

os._exit(1)

248

self.add()

457

249

else:

458

250

if error is None:

459

251

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

460

252

else:

461

253

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

462

463

254

def activate(self):

464

255

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

465

256

if self.server is None:

469

260

follow_name_owner_changes=True),

470

261

avahi.DBUS_INTERFACE_SERVER)

471

262

self.server.connect_to_signal("StateChanged",

472

self.server_state_changed)

263

self.server_state_changed)

473

264

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

474

265

475

266

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

750

267

class Client(object):

751

268

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

752

269

753

270

Attributes:

754

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

271

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

755

272

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

756

273

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

757

274

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

758

275

to see if the client lives.

759

276

'None' if no process is running.

760

checker_callback_tag: a GObject event source tag, or None

277

checker_callback_tag: a gobject event source tag, or None

761

278

checker_command: string; External command which is run to check

762

279

if client lives. %() expansions are done at

763

280

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

764

281

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

765

checker_initiator_tag: a GObject event source tag, or None

282

checker_initiator_tag: a gobject event source tag, or None

766

283

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

767

client_structure: Object describing what attributes a client has

768

and is used for storing the client at exit

769

284

current_checker_command: string; current running checker_command

770

disable_initiator_tag: a GObject event source tag, or None

285

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

286

disable_initiator_tag: a gobject event source tag, or None

771

287

enabled: bool()

772

288

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

773

289

uniquely identify the client

775

291

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

776

292

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

777

293

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

778

last_checker_status: integer between 0 and 255 reflecting exit

779

status of last checker. -1 reflects crashed

780

checker, -2 means no checker completed yet.

781

last_checker_signal: The signal which killed the last checker, if

782

last_checker_status is -1

783

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

294

last_enabled: datetime.datetime(); (UTC)

784

295

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

785

296

D-Bus identifiers

786

297

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

787

298

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

788

299

until this client is disabled

789

extended_timeout: extra long timeout when secret has been sent

790

300

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()

794

301

"""

795

302

796

303

runtime_expansions = ("approval_delay", "approval_duration",

797

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

798

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

799

"last_approval_request", "last_checked_ok",

304

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

305

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

800

306

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

801

client_defaults = {

802

"timeout": "PT5M",

803

"extended_timeout": "PT15M",

804

"interval": "PT2M",

805

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

806

"host": "",

807

"approval_delay": "PT0S",

808

"approval_duration": "PT1S",

809

"approved_by_default": "True",

810

"enabled": "True",

811

}

812

307

813

308

@staticmethod

814

def config_parser(config):

815

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

816

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

817

with exceptions for any special settings as defined above.

818

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

819

value given the same arguments.

820

"""

821

settings = {}

822

for client_name in config.sections():

823

section = dict(config.items(client_name))

824

client = settings[client_name] = {}

825

826

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

827

# Reformat values from string types to Python types

828

client["approved_by_default"] = config.getboolean(

829

client_name, "approved_by_default")

830

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

831

"enabled")

832

833

# Uppercase and remove spaces from fingerprint for later

834

# comparison purposes with return value from the

835

# fingerprint() function

836

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

837

.replace(" ", ""))

838

if "secret" in section:

839

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

840

.encode("utf-8"),

841

"base64")

842

elif "secfile" in section:

843

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

844

(section["secfile"])),

845

"rb") as secfile:

846

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

847

else:

848

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

849

.format(section))

850

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

851

client["extended_timeout"] = string_to_delta(

852

section["extended_timeout"])

853

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

854

client["approval_delay"] = string_to_delta(

855

section["approval_delay"])

856

client["approval_duration"] = string_to_delta(

857

section["approval_duration"])

858

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

859

client["last_approval_request"] = None

860

client["last_checked_ok"] = None

861

client["last_checker_status"] = -2

862

863

return settings

864

865

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

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."""

866

330

self.name = name

867

if server_settings is None:

868

server_settings = {}

869

self.server_settings = server_settings

870

# adding all client settings

871

for setting, value in settings.items():

872

setattr(self, setting, value)

873

874

if self.enabled:

875

if not hasattr(self, "last_enabled"):

876

self.last_enabled = datetime.datetime.utcnow()

877

if not hasattr(self, "expires"):

878

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

879

+ self.timeout)

880

else:

881

self.last_enabled = None

882

self.expires = None

883

331

if config is None:

332

config = {}

884

333

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(" ", ""))

885

339

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

886

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

887

datetime.datetime.utcnow())

888

889

# attributes specific for this server instance

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

890

359

self.checker = None

891

360

self.checker_initiator_tag = None

892

361

self.disable_initiator_tag = None

893

362

self.checker_callback_tag = None

363

self.checker_command = config["checker"]

894

364

self.current_checker_command = None

895

self.approved = None

365

self.last_connect = None

366

self._approved = None

367

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

368

True)

896

369

self.approvals_pending = 0

897

self.changedstate = multiprocessing_manager.Condition(

898

multiprocessing_manager.Lock())

899

self.client_structure = [attr

900

for attr in self.__dict__.keys()

901

if not attr.startswith("_")]

902

self.client_structure.append("client_structure")

903

904

for name, t in inspect.getmembers(

905

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

906

if not name.startswith("_"):

907

self.client_structure.append(name)

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())

908

375

909

# Send notice to process children that client state has changed

910

376

def send_changedstate(self):

911

with self.changedstate:

912

self.changedstate.notify_all()

913

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

914

381

def enable(self):

915

382

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

916

383

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

917

384

# Already enabled

918

385

return

919

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

920

self.enabled = True

386

self.send_changedstate()

921

387

self.last_enabled = datetime.datetime.utcnow()

922

self.init_checker()

923

self.send_changedstate()

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()

924

400

925

401

def disable(self, quiet=True):

926

402

"""Disable this client."""

927

403

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

928

404

return False

929

405

if not quiet:

406

self.send_changedstate()

407

if not quiet:

930

408

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

931

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

932

GObject.source_remove(self.disable_initiator_tag)

409

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

410

gobject.source_remove(self.disable_initiator_tag)

933

411

self.disable_initiator_tag = None

934

self.expires = None

935

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

936

GObject.source_remove(self.checker_initiator_tag)

412

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

413

gobject.source_remove(self.checker_initiator_tag)

937

414

self.checker_initiator_tag = None

938

415

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

939

418

self.enabled = False

940

if not quiet:

941

self.send_changedstate()

942

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

419

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

943

420

return False

944

421

945

422

def __del__(self):

423

self.disable_hook = None

946

424

self.disable()

947

425

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):

426

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

966

427

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

967

428

self.checker_callback_tag = None

968

429

self.checker = None

969

# Read return code from connection (see call_pipe)

970

returncode = connection.recv()

971

connection.close()

972

973

if returncode >= 0:

974

self.last_checker_status = returncode

975

self.last_checker_signal = None

976

if self.last_checker_status == 0:

430

if os.WIFEXITED(condition):

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

977

433

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

978

434

vars(self))

979

435

self.checked_ok()

980

436

else:

981

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

437

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

438

vars(self))

982

439

else:

983

self.last_checker_status = -1

984

self.last_checker_signal = -returncode

985

440

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

986

441

vars(self))

987

return False

988

442

989

443

def checked_ok(self):

990

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

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

"""

991

449

self.last_checked_ok = datetime.datetime.utcnow()

992

self.last_checker_status = 0

993

self.last_checker_signal = None

994

self.bump_timeout()

995

996

def bump_timeout(self, timeout=None):

997

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

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

450

gobject.source_remove(self.disable_initiator_tag)

451

self.disable_initiator_tag = (gobject.timeout_add

452

(self.timeout_milliseconds(),

453

self.disable))

1007

454

1008

455

def need_approval(self):

1009

456

self.last_approval_request = datetime.datetime.utcnow()

1014

461

If a checker already exists, leave it running and do

1015

462

nothing."""

1016

463

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

1017

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

1018

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

1019

# would inevitably timeout, since no checker would get a

1020

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

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

1021

468

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

1022

469

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

1023

470

# should be.

1024

471

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

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)

1029

485

# Start a new checker if needed

1030

486

if self.checker is None:

1031

# Escape attributes for the shell

1032

escaped_attrs = {

1033

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

1034

for attr in self.runtime_expansions }

1035

487

try:

1036

command = self.checker_command % escaped_attrs

1037

except TypeError as error:

1038

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

1039

self.checker_command,

1040

exc_info=error)

1041

return True # Try again later

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

1042

506

self.current_checker_command = command

1043

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

1044

self.name)

1045

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

1046

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

1047

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

1048

# always replaced by /dev/null.)

1049

# The exception is when not debugging but nevertheless

1050

# running in the foreground; use the previously

1051

# created wnull.

1052

popen_args = { "close_fds": True,

1053

"shell": True,

1054

"cwd": "/" }

1055

if (not self.server_settings["debug"]

1056

and self.server_settings["foreground"]):

1057

popen_args.update({"stdout": wnull,

1058

"stderr": wnull })

1059

pipe = multiprocessing.Pipe(duplex = False)

1060

self.checker = multiprocessing.Process(

1061

target = call_pipe,

1062

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

1063

kwargs = popen_args)

1064

self.checker.start()

1065

self.checker_callback_tag = GObject.io_add_watch(

1066

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

1067

self.checker_callback, pipe[0], command)

1068

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

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

1069

531

return True

1070

532

1071

533

def stop_checker(self):

1072

534

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

1073

535

if self.checker_callback_tag:

1074

GObject.source_remove(self.checker_callback_tag)

536

gobject.source_remove(self.checker_callback_tag)

1075

537

self.checker_callback_tag = None

1076

538

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

1077

539

return

1078

540

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

1079

self.checker.terminate()

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

1080

549

self.checker = None

1081

550

1082

1083

def dbus_service_property(dbus_interface,

1084

signature="v",

1085

access="readwrite",

1086

byte_arrays=False):

551

def dbus_service_property(dbus_interface, signature="v",

552

access="readwrite", byte_arrays=False):

1087

553

"""Decorators for marking methods of a DBusObjectWithProperties to

1088

554

become properties on the D-Bus.

1089

555

1098

564

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

1099

565

if byte_arrays and signature != "ay":

1100

566

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

1101

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

1102

567

" signature %r" % signature)

1103

568

def decorator(func):

1104

569

func._dbus_is_property = True

1105

570

func._dbus_interface = dbus_interface

1110

575

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

1111

576

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1112

577

return func

1113

1114

return decorator

1115

1116

1117

def dbus_interface_annotations(dbus_interface):

1118

"""Decorator for marking functions returning interface annotations

1119

1120

Usage:

1121

1122

@dbus_interface_annotations("org.example.Interface")

1123

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

1124

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

1125

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

1126

"false"}

1127

"""

1128

1129

def decorator(func):

1130

func._dbus_is_interface = True

1131

func._dbus_interface = dbus_interface

1132

func._dbus_name = dbus_interface

1133

return func

1134

1135

return decorator

1136

1137

1138

def dbus_annotations(annotations):

1139

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

1140

Usage:

1141

1142

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

1143

"org.freedesktop.DBus.Property."

1144

"EmitsChangedSignal": "false"})

1145

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

1146

access="r")

1147

def Property_dbus_property(self):

1148

return dbus.Boolean(False)

1149

1150

See also the DBusObjectWithAnnotations class.

1151

"""

1152

1153

def decorator(func):

1154

func._dbus_annotations = annotations

1155

return func

1156

1157

578

return decorator

1158

579

1159

580

1160

581

class DBusPropertyException(dbus.exceptions.DBusException):

1161

582

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

1162

583

"""

1163

pass

584

def __unicode__(self):

585

return unicode(str(self))

1164

586

1165

587

1166

588

class DBusPropertyAccessException(DBusPropertyException):

1175

597

pass

1176

598

1177

599

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):

600

class DBusObjectWithProperties(dbus.service.Object):

1268

601

"""A D-Bus object with properties.

1269

602

1270

603

Classes inheriting from this can use the dbus_service_property

1271

604

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

1272

605

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

1273

606

"""

1274

607

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

1275

619

def _get_dbus_property(self, interface_name, property_name):

1276

620

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

1277

621

property with the specified name and interface.

1278

622

"""

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

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

1286

633

# No such property

1287

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

1288

self.dbus_object_path, interface_name, property_name))

1289

1290

@classmethod

1291

def _get_all_interface_names(cls):

1292

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

1293

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

1294

"_dbus_interface", None)

1295

for x in (inspect.getmro(cls))

1296

for attr in dir(x))

1297

if name is not None)

1298

1299

@dbus.service.method(dbus.PROPERTIES_IFACE,

1300

in_signature="ss",

634

raise DBusPropertyNotFound(self.dbus_object_path + ":"

635

+ interface_name + "."

636

+ property_name)

637

638

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

1301

639

out_signature="v")

1302

640

def Get(self, interface_name, property_name):

1303

641

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

1321

659

# The byte_arrays option is not supported yet on

1322

660

# signatures other than "ay".

1323

661

if prop._dbus_signature != "ay":

1324

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

1325

"'ay' signature {!r}"

1326

.format(prop._dbus_signature))

1327

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

1328

for byte in value))

662

raise ValueError

663

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

664

for byte in value))

1329

665

prop(value)

1330

666

1331

@dbus.service.method(dbus.PROPERTIES_IFACE,

1332

in_signature="s",

667

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

1333

668

out_signature="a{sv}")

1334

669

def GetAll(self, interface_name):

1335

670

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

1336

671

standard.

1337

672

1338

673

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

1339

674

"""

1340

properties = {}

1341

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

675

all = {}

676

for name, prop in self._get_all_dbus_properties():

1342

677

if (interface_name

1343

678

and interface_name != prop._dbus_interface):

1344

679

# Interface non-empty but did not match

1348

683

continue

1349

684

value = prop()

1350

685

if not hasattr(value, "variant_level"):

1351

properties[name] = value

686

all[name] = value

1352

687

continue

1353

properties[name] = type(value)(

1354

value, variant_level = value.variant_level + 1)

1355

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

1356

1357

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

1358

def PropertiesChanged(self, interface_name, changed_properties,

1359

invalidated_properties):

1360

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

1361

standard.

1362

"""

1363

pass

688

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

689

value.variant_level+1)

690

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

1364

691

1365

692

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1366

693

out_signature="s",

1367

694

path_keyword='object_path',

1368

695

connection_keyword='connection')

1369

696

def Introspect(self, object_path, connection):

1370

"""Overloading of standard D-Bus method.

1371

1372

Inserts property tags and interface annotation tags.

697

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

1373

698

"""

1374

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1375

object_path,

1376

connection)

699

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

700

connection)

1377

701

try:

1378

702

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

1379

1380

703

def make_tag(document, name, prop):

1381

704

e = document.createElement("property")

1382

705

e.setAttribute("name", name)

1383

706

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

1384

707

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

1385

708

return e

1386

1387

709

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

1388

# Add property tags

1389

710

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

1390

711

for name, prop

1391

in self._get_all_dbus_things("property")

712

in self._get_all_dbus_properties()

1392

713

if prop._dbus_interface

1393

714

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

1394

715

if_tag.appendChild(tag)

1395

# Add annotation tags for properties

1396

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

1397

annots = dict()

1398

for name, prop in self._get_all_dbus_things(

1399

"property"):

1400

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

1401

and prop._dbus_interface

1402

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

1403

annots.update(getattr(

1404

prop, "_dbus_annotations", {}))

1405

for name, value in annots.items():

1406

ann_tag = document.createElement(

1407

"annotation")

1408

ann_tag.setAttribute("name", name)

1409

ann_tag.setAttribute("value", value)

1410

tag.appendChild(ann_tag)

1411

716

# Add the names to the return values for the

1412

717

# "org.freedesktop.DBus.Properties" methods

1413

718

if (if_tag.getAttribute("name")

1428

733

except (AttributeError, xml.dom.DOMException,

1429

734

xml.parsers.expat.ExpatError) as error:

1430

735

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

1431

exc_info=error)

1432

return xmlstring

1433

1434

try:

1435

dbus.OBJECT_MANAGER_IFACE

1436

except AttributeError:

1437

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

1438

1439

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1440

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

1441

1442

Classes inheriting from this exposes the standard

1443

GetManagedObjects call and the InterfacesAdded and

1444

InterfacesRemoved signals on the standard

1445

"org.freedesktop.DBus.ObjectManager" interface.

1446

1447

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

1448

manually.

1449

"""

1450

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1451

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

1452

def GetManagedObjects(self):

1453

"""This function must be overridden"""

1454

raise NotImplementedError()

1455

1456

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1457

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

1458

def InterfacesAdded(self, object_path, interfaces_and_properties):

1459

pass

1460

1461

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

1462

def InterfacesRemoved(self, object_path, interfaces):

1463

pass

1464

1465

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1466

out_signature = "s",

1467

path_keyword = 'object_path',

1468

connection_keyword = 'connection')

1469

def Introspect(self, object_path, connection):

1470

"""Overloading of standard D-Bus method.

1471

1472

Override return argument name of GetManagedObjects to be

1473

"objpath_interfaces_and_properties"

1474

"""

1475

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1476

object_path,

1477

connection)

1478

try:

1479

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

1480

1481

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

1482

# Fix argument name for the GetManagedObjects method

1483

if (if_tag.getAttribute("name")

1484

== dbus.OBJECT_MANAGER_IFACE):

1485

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

1486

if (cn.getAttribute("name")

1487

== "GetManagedObjects"):

1488

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

1489

if (arg.getAttribute("direction")

1490

== "out"):

1491

arg.setAttribute(

1492

"name",

1493

"objpath_interfaces"

1494

"_and_properties")

1495

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

1496

document.unlink()

1497

except (AttributeError, xml.dom.DOMException,

1498

xml.parsers.expat.ExpatError) as error:

1499

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

1500

exc_info = error)

1501

return xmlstring

1502

1503

def datetime_to_dbus(dt, variant_level=0):

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"})

736

error)

737

return xmlstring

738

739

1679

740

class ClientDBus(Client, DBusObjectWithProperties):

1680

741

"""A Client class using D-Bus

1681

742

1685

746

"""

1686

747

1687

748

runtime_expansions = (Client.runtime_expansions

1688

+ ("dbus_object_path", ))

1689

1690

_interface = "se.recompile.Mandos.Client"

749

+ ("dbus_object_path",))

1691

750

1692

751

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

1693

752

1694

753

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

754

self._approvals_pending = 0

1695

755

self.bus = bus

1696

756

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

1697

757

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

1698

758

# the D-Bus

1699

client_object_name = str(self.name).translate(

759

client_object_name = unicode(self.name).translate(

1700

760

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

1701

761

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

1702

self.dbus_object_path = dbus.ObjectPath(

1703

"/clients/" + client_object_name)

762

self.dbus_object_path = (dbus.ObjectPath

763

("/clients/" + client_object_name))

1704

764

DBusObjectWithProperties.__init__(self, self.bus,

1705

765

self.dbus_object_path)

1706

1707

def notifychangeproperty(transform_func, dbus_name,

1708

type_func=lambda x: x,

1709

variant_level=1,

1710

invalidate_only=False,

1711

_interface=_interface):

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

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

1787

810

1788

811

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

1789

812

try:

1794

817

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

1795

818

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

1796

819

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:

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)

1804

829

# Emit D-Bus signal

1805

830

self.CheckerCompleted(dbus.Int16(exitstatus),

1806

# This is specific to GNU libC

1807

dbus.Int64(exitstatus << 8),

831

dbus.Int64(condition),

1808

832

dbus.String(command))

1809

833

else:

1810

834

# Emit D-Bus signal

1811

835

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

1812

dbus.Int64(

1813

# This is specific to GNU libC

1814

(exitstatus << 8)

1815

| self.last_checker_signal),

836

dbus.Int64(condition),

1816

837

dbus.String(command))

1817

return ret

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

1818

858

1819

859

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

1820

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

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

1821

865

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

1822

866

# Only if new checker process was started

1823

867

if (self.checker is not None

1824

868

and old_checker_pid != self.checker.pid):

1825

869

# Emit D-Bus signal

1826

870

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

1827

874

return r

1828

875

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

1829

885

def _reset_approved(self):

1830

self.approved = None

886

self._approved = None

1831

887

return False

1832

888

1833

889

def approve(self, value=True):

1834

self.approved = value

1835

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

1836

* 1000), self._reset_approved)

1837

890

self.send_changedstate()

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

893

(self.approval_duration),

894

self._reset_approved)

895

1838

896

1839

897

## D-Bus methods, signals & properties

1840

1841

## Interfaces

898

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

1842

899

1843

900

## Signals

1844

901

1855

912

pass

1856

913

1857

914

# PropertyChanged - signal

1858

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

1859

915

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

1860

916

def PropertyChanged(self, property, value):

1861

917

"D-Bus signal"

1895

951

self.checked_ok()

1896

952

1897

953

# Enable - method

1898

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

1899

954

@dbus.service.method(_interface)

1900

955

def Enable(self):

1901

956

"D-Bus method"

1902

957

self.enable()

1903

958

1904

959

# StartChecker - method

1905

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

1906

960

@dbus.service.method(_interface)

1907

961

def StartChecker(self):

1908

962

"D-Bus method"

1909

963

self.start_checker()

1910

964

1911

965

# Disable - method

1912

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

1913

966

@dbus.service.method(_interface)

1914

967

def Disable(self):

1915

968

"D-Bus method"

1916

969

self.disable()

1917

970

1918

971

# StopChecker - method

1919

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

1920

972

@dbus.service.method(_interface)

1921

973

def StopChecker(self):

1922

974

self.stop_checker()

1929

981

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

1930

982

1931

983

# ApprovedByDefault - property

1932

@dbus_service_property(_interface,

1933

signature="b",

984

@dbus_service_property(_interface, signature="b",

1934

985

access="readwrite")

1935

986

def ApprovedByDefault_dbus_property(self, value=None):

1936

987

if value is None: # get

1937

988

return dbus.Boolean(self.approved_by_default)

1938

989

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

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

992

dbus.Boolean(value, variant_level=1))

1939

993

1940

994

# ApprovalDelay - property

1941

@dbus_service_property(_interface,

1942

signature="t",

995

@dbus_service_property(_interface, signature="t",

1943

996

access="readwrite")

1944

997

def ApprovalDelay_dbus_property(self, value=None):

1945

998

if value is None: # get

1946

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

1947

* 1000)

999

return dbus.UInt64(self.approval_delay_milliseconds())

1948

1000

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))

1949

1004

1950

1005

# ApprovalDuration - property

1951

@dbus_service_property(_interface,

1952

signature="t",

1006

@dbus_service_property(_interface, signature="t",

1953

1007

access="readwrite")

1954

1008

def ApprovalDuration_dbus_property(self, value=None):

1955

1009

if value is None: # get

1956

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

1957

* 1000)

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1011

self.approval_duration))

1958

1012

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))

1959

1016

1960

1017

# Name - property

1961

@dbus_annotations(

1962

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

1963

1018

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

1964

1019

def Name_dbus_property(self):

1965

1020

return dbus.String(self.name)

1966

1021

1967

1022

# Fingerprint - property

1968

@dbus_annotations(

1969

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

1970

1023

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

1971

1024

def Fingerprint_dbus_property(self):

1972

1025

return dbus.String(self.fingerprint)

1973

1026

1974

1027

# Host - property

1975

@dbus_service_property(_interface,

1976

signature="s",

1028

@dbus_service_property(_interface, signature="s",

1977

1029

access="readwrite")

1978

1030

def Host_dbus_property(self, value=None):

1979

1031

if value is None: # get

1980

1032

return dbus.String(self.host)

1981

self.host = str(value)

1033

self.host = value

1034

# Emit D-Bus signal

1035

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

1036

dbus.String(value, variant_level=1))

1982

1037

1983

1038

# Created - property

1984

@dbus_annotations(

1985

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

1986

1039

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

1987

1040

def Created_dbus_property(self):

1988

return datetime_to_dbus(self.created)

1041

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

1989

1042

1990

1043

# LastEnabled - property

1991

1044

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

1992

1045

def LastEnabled_dbus_property(self):

1993

return datetime_to_dbus(self.last_enabled)

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

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

1994

1049

1995

1050

# Enabled - property

1996

@dbus_service_property(_interface,

1997

signature="b",

1051

@dbus_service_property(_interface, signature="b",

1998

1052

access="readwrite")

1999

1053

def Enabled_dbus_property(self, value=None):

2000

1054

if value is None: # get

2005

1059

self.disable()

2006

1060

2007

1061

# LastCheckedOK - property

2008

@dbus_service_property(_interface,

2009

signature="s",

1062

@dbus_service_property(_interface, signature="s",

2010

1063

access="readwrite")

2011

1064

def LastCheckedOK_dbus_property(self, value=None):

2012

1065

if value is not None:

2013

1066

self.checked_ok()

2014

1067

return

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)

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))

2026

1072

2027

1073

# LastApprovalRequest - property

2028

1074

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

2029

1075

def LastApprovalRequest_dbus_property(self):

2030

return datetime_to_dbus(self.last_approval_request)

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))

2031

1081

2032

1082

# Timeout - property

2033

@dbus_service_property(_interface,

2034

signature="t",

1083

@dbus_service_property(_interface, signature="t",

2035

1084

access="readwrite")

2036

1085

def Timeout_dbus_property(self, value=None):

2037

1086

if value is None: # get

2038

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

2039

old_timeout = self.timeout

1087

return dbus.UInt64(self.timeout_milliseconds())

2040

1088

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

2041

# Reschedule disabling

2042

if self.enabled:

2043

now = datetime.datetime.utcnow()

2044

self.expires += self.timeout - old_timeout

2045

if self.expires <= now:

2046

# The timeout has passed

2047

self.disable()

2048

else:

2049

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

2050

is None):

2051

return

2052

GObject.source_remove(self.disable_initiator_tag)

2053

self.disable_initiator_tag = GObject.timeout_add(

2054

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

2055

self.disable)

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)

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))

2066

1109

2067

1110

# Interval - property

2068

@dbus_service_property(_interface,

2069

signature="t",

1111

@dbus_service_property(_interface, signature="t",

2070

1112

access="readwrite")

2071

1113

def Interval_dbus_property(self, value=None):

2072

1114

if value is None: # get

2073

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

1115

return dbus.UInt64(self.interval_milliseconds())

2074

1116

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))

2075

1120

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

2076

1121

return

2077

if self.enabled:

2078

# Reschedule checker run

2079

GObject.source_remove(self.checker_initiator_tag)

2080

self.checker_initiator_tag = GObject.timeout_add(

2081

value, self.start_checker)

2082

self.start_checker() # Start one now, too

2083

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

2084

1128

# Checker - property

2085

@dbus_service_property(_interface,

2086

signature="s",

1129

@dbus_service_property(_interface, signature="s",

2087

1130

access="readwrite")

2088

1131

def Checker_dbus_property(self, value=None):

2089

1132

if value is None: # get

2090

1133

return dbus.String(self.checker_command)

2091

self.checker_command = str(value)

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))

2092

1139

2093

1140

# CheckerRunning - property

2094

@dbus_service_property(_interface,

2095

signature="b",

1141

@dbus_service_property(_interface, signature="b",

2096

1142

access="readwrite")

2097

1143

def CheckerRunning_dbus_property(self, value=None):

2098

1144

if value is None: # get

2103

1149

self.stop_checker()

2104

1150

2105

1151

# ObjectPath - property

2106

@dbus_annotations(

2107

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

2108

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

2109

1152

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

2110

1153

def ObjectPath_dbus_property(self):

2111

1154

return self.dbus_object_path # is already a dbus.ObjectPath

2112

1155

2113

1156

# Secret = property

2114

@dbus_annotations(

2115

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

2116

"invalidates"})

2117

@dbus_service_property(_interface,

2118

signature="ay",

2119

access="write",

2120

byte_arrays=True)

1157

@dbus_service_property(_interface, signature="ay",

1158

access="write", byte_arrays=True)

2121

1159

def Secret_dbus_property(self, value):

2122

self.secret = bytes(value)

1160

self.secret = str(value)

2123

1161

2124

1162

del _interface

2125

1163

2129

1167

self._pipe = child_pipe

2130

1168

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

2131

1169

if not self._pipe.recv():

2132

raise KeyError(fpr)

2133

1170

raise KeyError()

1171

2134

1172

def __getattribute__(self, name):

2135

if name == '_pipe':

1173

if(name == '_pipe'):

2136

1174

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

2137

1175

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

2138

1176

data = self._pipe.recv()

2139

1177

if data[0] == 'data':

2140

1178

return data[1]

2141

1179

if data[0] == 'function':

2142

2143

1180

def func(*args, **kwargs):

2144

1181

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

2145

1182

return self._pipe.recv()[1]

2146

2147

1183

return func

2148

1184

2149

1185

def __setattr__(self, name, value):

2150

if name == '_pipe':

1186

if(name == '_pipe'):

2151

1187

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

2152

1188

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

2153

1189

2161

1197

def handle(self):

2162

1198

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

2163

1199

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

2164

str(self.client_address))

1200

unicode(self.client_address))

2165

1201

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

2166

1202

self.server.child_pipe.fileno())

2167

2168

session = gnutls.ClientSession(self.request)

2169

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

2170

1214

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

2171

1215

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

2172

1216

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

2175

1219

priority = self.server.gnutls_priority

2176

1220

if priority is None:

2177

1221

priority = "NORMAL"

2178

gnutls.priority_set_direct(session._c_object, priority,

2179

None)

2180

1222

(gnutls.library.functions

1223

.gnutls_priority_set_direct(session._c_object,

1224

priority, None))

1225

2181

1226

# Start communication using the Mandos protocol

2182

1227

# Get protocol number

2183

1228

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

2184

1229

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

2185

1230

try:

2186

1231

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

2187

raise RuntimeError(line)

1232

raise RuntimeError

2188

1233

except (ValueError, IndexError, RuntimeError) as error:

2189

1234

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

2190

1235

return

2191

1236

2192

1237

# Start GnuTLS connection

2193

1238

try:

2194

1239

session.handshake()

2195

except gnutls.Error as error:

1240

except gnutls.errors.GNUTLSError as error:

2196

1241

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

2197

1242

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

2198

1243

# established. Just abandon the request.

2199

1244

return

2200

1245

logger.debug("Handshake succeeded")

2201

1246

2202

1247

approval_required = False

2203

1248

try:

2204

1249

try:

2205

fpr = self.fingerprint(

2206

self.peer_certificate(session))

2207

except (TypeError, gnutls.Error) as error:

1250

fpr = self.fingerprint(self.peer_certificate

1251

(session))

1252

except (TypeError,

1253

gnutls.errors.GNUTLSError) as error:

2208

1254

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

2209

1255

return

2210

1256

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

2211

1257

2212

1258

try:

2213

1259

client = ProxyClient(child_pipe, fpr,

2214

1260

self.client_address)

2223

1269

while True:

2224

1270

if not client.enabled:

2225

1271

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

2226

client.name)

1272

client.name)

2227

1273

if self.server.use_dbus:

2228

1274

# Emit D-Bus signal

2229

client.Rejected("Disabled")

1275

client.Rejected("Disabled")

2230

1276

return

2231

1277

2232

if client.approved or not client.approval_delay:

1278

if client._approved or not client.approval_delay:

2233

1279

#We are approved or approval is disabled

2234

1280

break

2235

elif client.approved is None:

1281

elif client._approved is None:

2236

1282

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

2237

1283

client.name)

2238

1284

if self.server.use_dbus:

2239

1285

# Emit D-Bus signal

2240

1286

client.NeedApproval(

2241

client.approval_delay.total_seconds()

2242

* 1000, client.approved_by_default)

1287

client.approval_delay_milliseconds(),

1288

client.approved_by_default)

2243

1289

else:

2244

1290

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

2245

1291

client.name)

2249

1295

return

2250

1296

2251

1297

#wait until timeout or approved

1298

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

2252

1299

time = datetime.datetime.now()

2253

1300

client.changedstate.acquire()

2254

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

1301

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

2255

1302

client.changedstate.release()

2256

1303

time2 = datetime.datetime.now()

2257

1304

if (time2 - time) >= delay:

2268

1315

else:

2269

1316

delay -= time2 - time

2270

1317

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

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

2278

1330

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

2279

# bump the timeout using extended_timeout

2280

client.bump_timeout(client.extended_timeout)

1331

# bump the timeout as if seen

1332

client.checked_ok()

2281

1333

if self.server.use_dbus:

2282

1334

# Emit D-Bus signal

2283

1335

client.GotSecret()

2287

1339

client.approvals_pending -= 1

2288

1340

try:

2289

1341

session.bye()

2290

except gnutls.Error as error:

2291

logger.warning("GnuTLS bye failed",

2292

exc_info=error)

1342

except gnutls.errors.GNUTLSError as error:

1343

logger.warning("GnuTLS bye failed")

2293

1344

2294

1345

@staticmethod

2295

1346

def peer_certificate(session):

2296

1347

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

2297

1348

# If not an OpenPGP certificate...

2298

if (gnutls.certificate_type_get(session._c_object)

2299

!= gnutls.CRT_OPENPGP):

2300

# ...return invalid data

2301

return b""

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

2302

1354

list_size = ctypes.c_uint(1)

2303

cert_list = (gnutls.certificate_get_peers

1355

cert_list = (gnutls.library.functions

1356

.gnutls_certificate_get_peers

2304

1357

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

2305

1358

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

2306

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

1359

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

1360

" certificate")

2307

1361

if list_size.value == 0:

2308

1362

return None

2309

1363

cert = cert_list[0]

2313

1367

def fingerprint(openpgp):

2314

1368

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2315

1369

# New GnuTLS "datum" with the OpenPGP public key

2316

datum = gnutls.datum_t(

2317

ctypes.cast(ctypes.c_char_p(openpgp),

2318

ctypes.POINTER(ctypes.c_ubyte)),

2319

ctypes.c_uint(len(openpgp)))

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))))

2320

1375

# New empty GnuTLS certificate

2321

crt = gnutls.openpgp_crt_t()

2322

gnutls.openpgp_crt_init(ctypes.byref(crt))

1376

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1377

(gnutls.library.functions

1378

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2323

1379

# Import the OpenPGP public key into the certificate

2324

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

2325

gnutls.OPENPGP_FMT_RAW)

1380

(gnutls.library.functions

1381

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

1382

gnutls.library.constants

1383

.GNUTLS_OPENPGP_FMT_RAW))

2326

1384

# Verify the self signature in the key

2327

1385

crtverify = ctypes.c_uint()

2328

gnutls.openpgp_crt_verify_self(crt, 0,

2329

ctypes.byref(crtverify))

1386

(gnutls.library.functions

1387

.gnutls_openpgp_crt_verify_self(crt, 0,

1388

ctypes.byref(crtverify)))

2330

1389

if crtverify.value != 0:

2331

gnutls.openpgp_crt_deinit(crt)

2332

raise gnutls.CertificateSecurityError("Verify failed")

1390

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1391

raise (gnutls.errors.CertificateSecurityError

1392

("Verify failed"))

2333

1393

# New buffer for the fingerprint

2334

1394

buf = ctypes.create_string_buffer(20)

2335

1395

buf_len = ctypes.c_size_t()

2336

1396

# Get the fingerprint from the certificate into the buffer

2337

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

2338

ctypes.byref(buf_len))

1397

(gnutls.library.functions

1398

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

1399

ctypes.byref(buf_len)))

2339

1400

# Deinit the certificate

2340

gnutls.openpgp_crt_deinit(crt)

1401

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2341

1402

# Convert the buffer to a Python bytestring

2342

1403

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

2343

1404

# Convert the bytestring to hexadecimal notation

2344

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

1405

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

2345

1406

return hex_fpr

2346

1407

2347

1408

2348

1409

class MultiprocessingMixIn(object):

2349

1410

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

2350

2351

1411

def sub_process_main(self, request, address):

2352

1412

try:

2353

1413

self.finish_request(request, address)

2354

except Exception:

1414

except:

2355

1415

self.handle_error(request, address)

2356

1416

self.close_request(request)

2357

1417

2358

1418

def process_request(self, request, address):

2359

1419

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

2360

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

2361

args = (request, address))

2362

proc.start()

2363

return proc

2364

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

2365

1422

2366

1423

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2367

1424

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

2368

2369

1425

def process_request(self, request, client_address):

2370

1426

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

2371

1427

2372

1428

This function creates a new pipe in self.pipe

2373

1429

"""

2374

1430

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2375

2376

proc = MultiprocessingMixIn.process_request(self, request,

2377

client_address)

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

2378

1434

self.child_pipe.close()

2379

self.add_pipe(parent_pipe, proc)

2380

2381

def add_pipe(self, parent_pipe, proc):

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

2382

1438

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

2383

raise NotImplementedError()

2384

1439

raise NotImplementedError

2385

1440

2386

1441

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2387

1442

socketserver.TCPServer, object):

2392

1447

interface: None or a network interface name (string)

2393

1448

use_ipv6: Boolean; to use IPv6 or not

2394

1449

"""

2395

2396

1450

def __init__(self, server_address, RequestHandlerClass,

2397

interface=None,

2398

use_ipv6=True,

2399

socketfd=None):

2400

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

2401

creating a new one with socket.socket().

2402

"""

1451

interface=None, use_ipv6=True):

2403

1452

self.interface = interface

2404

1453

if use_ipv6:

2405

1454

self.address_family = socket.AF_INET6

2406

if socketfd is not None:

2407

# Save the file descriptor

2408

self.socketfd = socketfd

2409

# Save the original socket.socket() function

2410

self.socket_socket = socket.socket

2411

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

2412

#

2413

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

2414

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

2415

# patching socket.socket.)

2416

#

2417

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

2418

@functools.wraps(socket.socket)

2419

def socket_wrapper(*args, **kwargs):

2420

# Restore original function so subsequent calls are

2421

# not affected.

2422

socket.socket = self.socket_socket

2423

del self.socket_socket

2424

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

2425

# saved file descriptor.

2426

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

2427

# Replace socket.socket() function with wrapper

2428

socket.socket = socket_wrapper

2429

# The socketserver.TCPServer.__init__ will call

2430

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

2431

# socket_wrapper(), if socketfd was set.

2432

1455

socketserver.TCPServer.__init__(self, server_address,

2433

1456

RequestHandlerClass)

2434

2435

1457

def server_bind(self):

2436

1458

"""This overrides the normal server_bind() function

2437

1459

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

2443

1465

self.interface)

2444

1466

else:

2445

1467

try:

2446

self.socket.setsockopt(

2447

socket.SOL_SOCKET, SO_BINDTODEVICE,

2448

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

1468

self.socket.setsockopt(socket.SOL_SOCKET,

1469

SO_BINDTODEVICE,

1470

str(self.interface

1471

+ '\0'))

2449

1472

except socket.error as error:

2450

if error.errno == errno.EPERM:

2451

logger.error("No permission to bind to"

2452

" interface %s", self.interface)

2453

elif error.errno == errno.ENOPROTOOPT:

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:

2454

1478

logger.error("SO_BINDTODEVICE not available;"

2455

1479

" cannot bind to interface %s",

2456

1480

self.interface)

2457

elif error.errno == errno.ENODEV:

2458

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

2459

" cannot bind", self.interface)

2460

1481

else:

2461

1482

raise

2462

1483

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

2465

1486

if self.address_family == socket.AF_INET6:

2466

1487

any_address = "::" # in6addr_any

2467

1488

else:

2468

any_address = "0.0.0.0" # INADDR_ANY

1489

any_address = socket.INADDR_ANY

2469

1490

self.server_address = (any_address,

2470

1491

self.server_address[1])

2471

1492

elif not self.server_address[1]:

2472

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

1493

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

1494

0)

2473

1495

# if self.interface:

2474

1496

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

2475

1497

# 0, # port

2487

1509

gnutls_priority GnuTLS priority string

2488

1510

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

2489

1511

2490

Assumes a GObject.MainLoop event loop.

1512

Assumes a gobject.MainLoop event loop.

2491

1513

"""

2492

2493

1514

def __init__(self, server_address, RequestHandlerClass,

2494

interface=None,

2495

use_ipv6=True,

2496

clients=None,

2497

gnutls_priority=None,

2498

use_dbus=True,

2499

socketfd=None):

1515

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

1516

gnutls_priority=None, use_dbus=True):

2500

1517

self.enabled = False

2501

1518

self.clients = clients

2502

1519

if self.clients is None:

2503

self.clients = {}

1520

self.clients = set()

2504

1521

self.use_dbus = use_dbus

2505

1522

self.gnutls_priority = gnutls_priority

2506

1523

IPv6_TCPServer.__init__(self, server_address,

2507

1524

RequestHandlerClass,

2508

1525

interface = interface,

2509

use_ipv6 = use_ipv6,

2510

socketfd = socketfd)

2511

1526

use_ipv6 = use_ipv6)

2512

1527

def server_activate(self):

2513

1528

if self.enabled:

2514

1529

return socketserver.TCPServer.server_activate(self)

2515

2516

1530

def enable(self):

2517

1531

self.enabled = True

2518

2519

def add_pipe(self, parent_pipe, proc):

1532

def add_pipe(self, parent_pipe):

2520

1533

# Call "handle_ipc" for both data and EOF events

2521

GObject.io_add_watch(

2522

parent_pipe.fileno(),

2523

GObject.IO_IN | GObject.IO_HUP,

2524

functools.partial(self.handle_ipc,

2525

parent_pipe = parent_pipe,

2526

proc = proc))

2527

2528

def handle_ipc(self, source, condition,

2529

parent_pipe=None,

2530

proc = None,

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,

2531

1540

client_object=None):

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()

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):

2536

1557

return False

2537

1558

2538

1559

# Read a request from the child

2543

1564

fpr = request[1]

2544

1565

address = request[2]

2545

1566

2546

for c in self.clients.values():

1567

for c in self.clients:

2547

1568

if c.fingerprint == fpr:

2548

1569

client = c

2549

1570

break

2552

1573

"dress: %s", fpr, address)

2553

1574

if self.use_dbus:

2554

1575

# Emit D-Bus signal

2555

mandos_dbus_service.ClientNotFound(fpr,

2556

address[0])

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

2557

1577

parent_pipe.send(False)

2558

1578

return False

2559

1579

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))

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))

2567

1585

parent_pipe.send(True)

2568

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

2569

# same fileno

1586

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

2570

1587

return False

2571

1588

if command == 'funcall':

2572

1589

funcname = request[1]

2573

1590

args = request[2]

2574

1591

kwargs = request[3]

2575

1592

2576

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

2577

funcname)(*args,

2578

**kwargs)))

2579

1593

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

1594

2580

1595

if command == 'getattr':

2581

1596

attrname = request[1]

2582

if isinstance(client_object.__getattribute__(attrname),

2583

collections.Callable):

2584

parent_pipe.send(('function', ))

1597

if callable(client_object.__getattribute__(attrname)):

1598

parent_pipe.send(('function',))

2585

1599

else:

2586

parent_pipe.send((

2587

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

1600

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

2588

1601

2589

1602

if command == 'setattr':

2590

1603

attrname = request[1]

2591

1604

value = request[2]

2592

1605

setattr(client_object, attrname, value)

2593

1606

2594

1607

return True

2595

1608

2596

1609

2597

def rfc3339_duration_to_delta(duration):

2598

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

2599

2600

>>> rfc3339_duration_to_delta("P7D")

2601

datetime.timedelta(7)

2602

>>> rfc3339_duration_to_delta("PT60S")

2603

datetime.timedelta(0, 60)

2604

>>> rfc3339_duration_to_delta("PT60M")

2605

datetime.timedelta(0, 3600)

2606

>>> rfc3339_duration_to_delta("PT24H")

2607

datetime.timedelta(1)

2608

>>> rfc3339_duration_to_delta("P1W")

2609

datetime.timedelta(7)

2610

>>> rfc3339_duration_to_delta("PT5M30S")

2611

datetime.timedelta(0, 330)

2612

>>> rfc3339_duration_to_delta("P1DT3M20S")

2613

datetime.timedelta(1, 200)

2614

"""

2615

2616

# Parsing an RFC 3339 duration with regular expressions is not

2617

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

2618

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

2619

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

2620

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

2621

# avoid excessive use of external libraries.

2622

2623

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

2624

Token = collections.namedtuple("Token", (

2625

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

2626

# a "group" containing digits

2627

"value", # datetime.timedelta or None

2628

"followers")) # Tokens valid after this token

2629

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

2630

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

2631

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

2632

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

2633

datetime.timedelta(seconds=1),

2634

frozenset((token_end, )))

2635

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

2636

datetime.timedelta(minutes=1),

2637

frozenset((token_second, token_end)))

2638

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

2639

datetime.timedelta(hours=1),

2640

frozenset((token_minute, token_end)))

2641

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

2642

None,

2643

frozenset((token_hour, token_minute,

2644

token_second)))

2645

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

2646

datetime.timedelta(days=1),

2647

frozenset((token_time, token_end)))

2648

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

2649

datetime.timedelta(weeks=4),

2650

frozenset((token_day, token_end)))

2651

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

2652

datetime.timedelta(weeks=52),

2653

frozenset((token_month, token_end)))

2654

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

2655

datetime.timedelta(weeks=1),

2656

frozenset((token_end, )))

2657

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

2658

frozenset((token_year, token_month,

2659

token_day, token_time,

2660

token_week)))

2661

# Define starting values

2662

value = datetime.timedelta() # Value so far

2663

found_token = None

2664

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

2665

s = duration # String left to parse

2666

# Loop until end token is found

2667

while found_token is not token_end:

2668

# Search for any currently valid tokens

2669

for token in followers:

2670

match = token.regexp.match(s)

2671

if match is not None:

2672

# Token found

2673

if token.value is not None:

2674

# Value found, parse digits

2675

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

2676

# Add to value so far

2677

value += factor * token.value

2678

# Strip token from string

2679

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

2680

# Go to found token

2681

found_token = token

2682

# Set valid next tokens

2683

followers = found_token.followers

2684

break

2685

else:

2686

# No currently valid tokens were found

2687

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

2688

.format(duration))

2689

# End token found

2690

return value

2691

2692

2693

1610

def string_to_delta(interval):

2694

1611

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

2695

1612

2706

1623

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

2707

1624

datetime.timedelta(0, 330)

2708

1625

"""

2709

2710

try:

2711

return rfc3339_duration_to_delta(interval)

2712

except ValueError:

2713

pass

2714

2715

1626

timevalue = datetime.timedelta(0)

2716

1627

for s in interval.split():

2717

1628

try:

2718

suffix = s[-1]

1629

suffix = unicode(s[-1])

2719

1630

value = int(s[:-1])

2720

1631

if suffix == "d":

2721

1632

delta = datetime.timedelta(value)

2728

1639

elif suffix == "w":

2729

1640

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

2730

1641

else:

2731

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

2732

except IndexError as e:

1642

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

1643

except (ValueError, IndexError) as e:

2733

1644

raise ValueError(*(e.args))

2734

1645

timevalue += delta

2735

1646

return timevalue

2736

1647

2737

1648

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

2738

1673

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

2739

1674

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

2740

1675

2748

1683

sys.exit()

2749

1684

if not noclose:

2750

1685

# Close all standard open file descriptors

2751

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

1686

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

2752

1687

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

2753

1688

raise OSError(errno.ENODEV,

2754

"{} not a character device"

2755

.format(os.devnull))

1689

"%s not a character device"

1690

% os.path.devnull)

2756

1691

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

2757

1692

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

2758

1693

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

2767

1702

2768

1703

parser = argparse.ArgumentParser()

2769

1704

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

2770

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

1705

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

2771

1706

help="show version number and exit")

2772

1707

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

2773

1708

help="Bind to interface IF")

2779

1714

help="Run self-test")

2780

1715

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

2781

1716

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

2782

" to terminal", default=None)

1717

" to terminal")

2783

1718

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

2784

1719

help="Debug level for stdout output")

2785

1720

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

2792

1727

" files")

2793

1728

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

2794

1729

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

2795

" system bus interface", default=None)

1730

" system bus interface")

2796

1731

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

2797

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

2798

default=None)

2799

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

2800

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

2801

" state", default=None)

2802

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

2803

help="Specify a file descriptor to a network"

2804

" socket to use instead of creating one")

2805

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

2806

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

2807

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

2808

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

2809

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

2810

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

2811

default=None)

2812

1732

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

2813

1733

options = parser.parse_args()

2814

1734

2815

1735

if options.check:

2816

1736

import doctest

2817

fail_count, test_count = doctest.testmod()

2818

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

1737

doctest.testmod()

1738

sys.exit()

2819

1739

2820

1740

# Default values for config file for server-global settings

2821

1741

server_defaults = { "interface": "",

2823

1743

"port": "",

2824

1744

"debug": "False",

2825

1745

"priority":

2826

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

2827

":+SIGN-DSA-SHA256",

1746

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

2828

1747

"servicename": "Mandos",

2829

1748

"use_dbus": "True",

2830

1749

"use_ipv6": "True",

2831

1750

"debuglevel": "",

2832

"restore": "True",

2833

"socket": "",

2834

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

2835

"foreground": "False",

2836

"zeroconf": "True",

2837

}

1751

}

2838

1752

2839

1753

# Parse config file for server-global settings

2840

1754

server_config = configparser.SafeConfigParser(server_defaults)

2841

1755

del server_defaults

2842

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

1756

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

1757

"mandos.conf"))

2843

1758

# Convert the SafeConfigParser object to a dict

2844

1759

server_settings = server_config.defaults()

2845

1760

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

2846

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

1761

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

2847

1762

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

2848

1763

option)

2849

1764

if server_settings["port"]:

2850

1765

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

2851

1766

"port")

2852

if server_settings["socket"]:

2853

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

2854

"socket")

2855

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

2856

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

2857

# happen with a supplied network socket.

2858

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

2859

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

2860

["socket"])

2861

1767

del server_config

2862

1768

2863

1769

# Override the settings from the config file with command line

2864

1770

# options, if set.

2865

1771

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

2866

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

2867

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

2868

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

1772

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

1773

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

2869

1774

value = getattr(options, option)

2870

1775

if value is not None:

2871

1776

server_settings[option] = value

2872

1777

del options

2873

1778

# Force all strings to be unicode

2874

1779

for option in server_settings.keys():

2875

if isinstance(server_settings[option], bytes):

2876

server_settings[option] = (server_settings[option]

2877

.decode("utf-8"))

2878

# Force all boolean options to be boolean

2879

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

2880

"foreground", "zeroconf"):

2881

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

2882

# Debug implies foreground

2883

if server_settings["debug"]:

2884

server_settings["foreground"] = True

1780

if type(server_settings[option]) is str:

1781

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

2885

1782

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

2886

1783

2887

1784

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

2888

1785

2889

if (not server_settings["zeroconf"]

2890

and not (server_settings["port"]

2891

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

2892

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

2893

2894

1786

# For convenience

2895

1787

debug = server_settings["debug"]

2896

1788

debuglevel = server_settings["debuglevel"]

2897

1789

use_dbus = server_settings["use_dbus"]

2898

1790

use_ipv6 = server_settings["use_ipv6"]

2899

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

2900

stored_state_file)

2901

foreground = server_settings["foreground"]

2902

zeroconf = server_settings["zeroconf"]

2903

2904

if debug:

2905

initlogger(debug, logging.DEBUG)

2906

else:

2907

if not debuglevel:

2908

initlogger(debug)

2909

else:

2910

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

2911

initlogger(debug, level)

2912

1791

2913

1792

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

2914

syslogger.setFormatter(

2915

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

2916

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

2917

server_settings["servicename"])))

1793

syslogger.setFormatter(logging.Formatter

1794

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

1795

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

1796

% server_settings["servicename"]))

2918

1797

2919

1798

# Parse config file with clients

2920

client_config = configparser.SafeConfigParser(Client

2921

.client_defaults)

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)

2922

1807

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

2923

1808

"clients.conf"))

2924

1809

2925

1810

global mandos_dbus_service

2926

1811

mandos_dbus_service = None

2927

1812

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

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"

2944

1824

try:

2945

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

2946

except IOError as e:

2947

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

2948

exc_info=e)

1825

pidfile = open(pidfilename, "w")

1826

except IOError:

1827

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

2949

1828

2950

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

2951

("mandos", "mandos"),

2952

("nobody", "nogroup")):

1829

try:

1830

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

1831

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

1832

except KeyError:

2953

1833

try:

2954

uid = pwd.getpwnam(name).pw_uid

2955

gid = pwd.getpwnam(group).pw_gid

2956

break

1834

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

1835

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

2957

1836

except KeyError:

2958

continue

2959

else:

2960

uid = 65534

2961

gid = 65534

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

2962

1843

try:

2963

1844

os.setgid(gid)

2964

1845

os.setuid(uid)

2965

if debug:

2966

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

2967

gid))

2968

1846

except OSError as error:

2969

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

2970

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

2971

if error.errno != errno.EPERM:

2972

raise

1847

if error[0] != errno.EPERM:

1848

raise error

2973

1849

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

2974

1858

if debug:

2975

1859

# Enable all possible GnuTLS debugging

2976

1860

2977

1861

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

2978

1862

# - GnuTLS manual

2979

gnutls.global_set_log_level(11)

1863

gnutls.library.functions.gnutls_global_set_log_level(11)

2980

1864

2981

@gnutls.log_func

1865

@gnutls.library.types.gnutls_log_func

2982

1866

def debug_gnutls(level, string):

2983

1867

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

2984

1868

2985

gnutls.global_set_log_function(debug_gnutls)

1869

(gnutls.library.functions

1870

.gnutls_global_set_log_function(debug_gnutls))

2986

1871

2987

1872

# Redirect stdin so all checkers get /dev/null

2988

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

1873

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

2989

1874

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

2990

1875

if null > 2:

2991

1876

os.close(null)

1877

else:

1878

# No console logging

1879

logger.removeHandler(console)

2992

1880

2993

1881

# Need to fork before connecting to D-Bus

2994

if not foreground:

1882

if not debug:

2995

1883

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

2996

1884

daemon()

2997

1885

2998

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

2999

# need to inform GObject that threads will be used.

3000

GObject.threads_init()

3001

3002

1886

global main_loop

3003

1887

# From the Avahi example code

3004

DBusGMainLoop(set_as_default=True)

3005

main_loop = GObject.MainLoop()

1888

DBusGMainLoop(set_as_default=True )

1889

main_loop = gobject.MainLoop()

3006

1890

bus = dbus.SystemBus()

3007

1891

# End of Avahi example code

3008

1892

if use_dbus:

3009

1893

try:

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)

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")

3018

1898

use_dbus = False

3019

1899

server_settings["use_dbus"] = False

3020

1900

tcp_server.use_dbus = False

3021

if zeroconf:

3022

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3023

service = AvahiServiceToSyslog(

3024

name = server_settings["servicename"],

3025

servicetype = "_mandos._tcp",

3026

protocol = protocol,

3027

bus = bus)

3028

if server_settings["interface"]:

3029

service.interface = if_nametoindex(

3030

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

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"])))

3031

1908

3032

1909

global multiprocessing_manager

3033

1910

multiprocessing_manager = multiprocessing.Manager()

3035

1912

client_class = Client

3036

1913

if use_dbus:

3037

1914

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

3038

3039

client_settings = Client.config_parser(client_config)

3040

old_client_settings = {}

3041

clients_data = {}

3042

3043

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

3044

global wnull

3045

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

3046

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

3047

# mode

3048

if debug or not foreground:

3049

wnull.close()

3050

3051

# Get client data and settings from last running state.

3052

if server_settings["restore"]:

3053

try:

3054

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

3055

if sys.version_info.major == 2:

3056

clients_data, old_client_settings = pickle.load(

3057

stored_state)

3058

else:

3059

bytes_clients_data, bytes_old_client_settings = (

3060

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

3061

### Fix bytes to strings

3062

## clients_data

3063

# .keys()

3064

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

3065

if isinstance(key, bytes)

3066

else key): value

3067

for key, value in

3068

bytes_clients_data.items() }

3069

for key in clients_data:

3070

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

3071

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

3072

for k, v in

3073

clients_data[key].items() }

3074

clients_data[key] = value

3075

# .client_structure

3076

value["client_structure"] = [

3077

(s.decode("utf-8")

3078

if isinstance(s, bytes)

3079

else s) for s in

3080

value["client_structure"] ]

3081

# .name & .host

3082

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

3083

if isinstance(value[k], bytes):

3084

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

3085

## old_client_settings

3086

# .keys

3087

old_client_settings = {

3088

(key.decode("utf-8")

3089

if isinstance(key, bytes)

3090

else key): value

3091

for key, value in

3092

bytes_old_client_settings.items() }

3093

# .host

3094

for value in old_client_settings.values():

3095

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

3096

os.remove(stored_state_path)

3097

except IOError as e:

3098

if e.errno == errno.ENOENT:

3099

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

3100

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

3101

else:

3102

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

3103

exc_info=e)

3104

raise

3105

except EOFError as e:

3106

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

3107

"EOFError:",

3108

exc_info=e)

3109

3110

with PGPEngine() as pgp:

3111

for client_name, client in clients_data.items():

3112

# Skip removed clients

3113

if client_name not in client_settings:

3114

continue

3115

3116

# Decide which value to use after restoring saved state.

3117

# We have three different values: Old config file,

3118

# new config file, and saved state.

3119

# New config value takes precedence if it differs from old

3120

# config value, otherwise use saved state.

3121

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

3122

try:

3123

# For each value in new config, check if it

3124

# differs from the old config value (Except for

3125

# the "secret" attribute)

3126

if (name != "secret"

3127

and (value !=

3128

old_client_settings[client_name][name])):

3129

client[name] = value

3130

except KeyError:

3131

pass

3132

3133

# Clients who has passed its expire date can still be

3134

# enabled if its last checker was successful. A Client

3135

# whose checker succeeded before we stored its state is

3136

# assumed to have successfully run all checkers during

3137

# downtime.

3138

if client["enabled"]:

3139

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

3140

if not client["last_checked_ok"]:

3141

logger.warning(

3142

"disabling client {} - Client never "

3143

"performed a successful checker".format(

3144

client_name))

3145

client["enabled"] = False

3146

elif client["last_checker_status"] != 0:

3147

logger.warning(

3148

"disabling client {} - Client last"

3149

" checker failed with error code"

3150

" {}".format(

3151

client_name,

3152

client["last_checker_status"]))

3153

client["enabled"] = False

3154

else:

3155

client["expires"] = (

3156

datetime.datetime.utcnow()

3157

+ client["timeout"])

3158

logger.debug("Last checker succeeded,"

3159

" keeping {} enabled".format(

3160

client_name))

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):

3161

1922

try:

3162

client["secret"] = pgp.decrypt(

3163

client["encrypted_secret"],

3164

client_settings[client_name]["secret"])

3165

except PGPError:

3166

# If decryption fails, we use secret from new settings

3167

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

3168

client_name))

3169

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

3170

["secret"])

3171

3172

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

3173

for client_name in (set(old_client_settings)

3174

- set(client_settings)):

3175

del clients_data[client_name]

3176

for client_name in (set(client_settings)

3177

- set(old_client_settings)):

3178

clients_data[client_name] = client_settings[client_name]

3179

3180

# Create all client objects

3181

for client_name, client in clients_data.items():

3182

tcp_server.clients[client_name] = client_class(

3183

name = client_name,

3184

settings = client,

3185

server_settings = server_settings)

3186

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()))

3187

1932

if not tcp_server.clients:

3188

1933

logger.warning("No clients defined")

3189

3190

if not foreground:

3191

if pidfile is not None:

3192

pid = os.getpid()

3193

try:

3194

with pidfile:

3195

print(pid, file=pidfile)

3196

except IOError:

3197

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

3198

pidfilename, pid)

3199

del pidfile

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

3200

1947

del pidfilename

3201

1948

1949

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

1950

3202

1951

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

3203

1952

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

3204

1953

3205

1954

if use_dbus:

3206

3207

@alternate_dbus_interfaces(

3208

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

3209

class MandosDBusService(DBusObjectWithObjectManager):

1955

class MandosDBusService(dbus.service.Object):

3210

1956

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

3211

3212

1957

def __init__(self):

3213

1958

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

3214

3215

_interface = "se.recompile.Mandos"

1959

_interface = "se.bsnet.fukt.Mandos"

3216

1960

3217

1961

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

3218

1962

def ClientAdded(self, objpath):

3224

1968

"D-Bus signal"

3225

1969

pass

3226

1970

3227

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

3228

"true"})

3229

1971

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

3230

1972

def ClientRemoved(self, objpath, name):

3231

1973

"D-Bus signal"

3232

1974

pass

3233

1975

3234

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

3235

"true"})

3236

1976

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

3237

1977

def GetAllClients(self):

3238

1978

"D-Bus method"

3239

return dbus.Array(c.dbus_object_path for c in

3240

tcp_server.clients.values())

1979

return dbus.Array(c.dbus_object_path

1980

for c in tcp_server.clients)

3241

1981

3242

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

3243

"true"})

3244

1982

@dbus.service.method(_interface,

3245

1983

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

3246

1984

def GetAllClientsWithProperties(self):

3247

1985

"D-Bus method"

3248

1986

return dbus.Dictionary(

3249

{ c.dbus_object_path: c.GetAll(

3250

"se.recompile.Mandos.Client")

3251

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

1987

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

1988

for c in tcp_server.clients),

3252

1989

signature="oa{sv}")

3253

1990

3254

1991

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

3255

1992

def RemoveClient(self, object_path):

3256

1993

"D-Bus method"

3257

for c in tcp_server.clients.values():

1994

for c in tcp_server.clients:

3258

1995

if c.dbus_object_path == object_path:

3259

del tcp_server.clients[c.name]

1996

tcp_server.clients.remove(c)

3260

1997

c.remove_from_connection()

3261

# Don't signal the disabling

1998

# Don't signal anything except ClientRemoved

3262

1999

c.disable(quiet=True)

3263

# Emit D-Bus signal for removal

3264

self.client_removed_signal(c)

2000

# Emit D-Bus signal

2001

self.ClientRemoved(object_path, c.name)

3265

2002

return

3266

2003

raise KeyError(object_path)

3267

2004

3268

2005

del _interface

3269

3270

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3271

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

3272

def GetManagedObjects(self):

3273

"""D-Bus method"""

3274

return dbus.Dictionary(

3275

{ client.dbus_object_path:

3276

dbus.Dictionary(

3277

{ interface: client.GetAll(interface)

3278

for interface in

3279

client._get_all_interface_names()})

3280

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

3281

3282

def client_added_signal(self, client):

3283

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

3284

if use_dbus:

3285

# New standard signal

3286

self.InterfacesAdded(

3287

client.dbus_object_path,

3288

dbus.Dictionary(

3289

{ interface: client.GetAll(interface)

3290

for interface in

3291

client._get_all_interface_names()}))

3292

# Old signal

3293

self.ClientAdded(client.dbus_object_path)

3294

3295

def client_removed_signal(self, client):

3296

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

3297

if use_dbus:

3298

# New standard signal

3299

self.InterfacesRemoved(

3300

client.dbus_object_path,

3301

client._get_all_interface_names())

3302

# Old signal

3303

self.ClientRemoved(client.dbus_object_path,

3304

client.name)

3305

2006

3306

2007

mandos_dbus_service = MandosDBusService()

3307

2008

3308

2009

def cleanup():

3309

2010

"Cleanup function; run on exit"

3310

if zeroconf:

3311

service.cleanup()

3312

3313

multiprocessing.active_children()

3314

wnull.close()

3315

if not (tcp_server.clients or client_settings):

3316

return

3317

3318

# Store client before exiting. Secrets are encrypted with key

3319

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

3320

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

3321

clients = {}

3322

with PGPEngine() as pgp:

3323

for client in tcp_server.clients.values():

3324

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

3325

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

3326

key)

3327

client_dict = {}

3328

3329

# A list of attributes that can not be pickled

3330

# + secret.

3331

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

3332

"checker", "server_settings" }

3333

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

3334

.Object):

3335

exclude.add(name)

3336

3337

client_dict["encrypted_secret"] = (client

3338

.encrypted_secret)

3339

for attr in client.client_structure:

3340

if attr not in exclude:

3341

client_dict[attr] = getattr(client, attr)

3342

3343

clients[client.name] = client_dict

3344

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

3345

3346

try:

3347

with tempfile.NamedTemporaryFile(

3348

mode='wb',

3349

suffix=".pickle",

3350

prefix='clients-',

3351

dir=os.path.dirname(stored_state_path),

3352

delete=False) as stored_state:

3353

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

3354

protocol = 2)

3355

tempname = stored_state.name

3356

os.rename(tempname, stored_state_path)

3357

except (IOError, OSError) as e:

3358

if not debug:

3359

try:

3360

os.remove(tempname)

3361

except NameError:

3362

pass

3363

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

3364

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

3365

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

3366

else:

3367

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

3368

exc_info=e)

3369

raise

3370

3371

# Delete all clients, and settings from config

2011

service.cleanup()

2012

3372

2013

while tcp_server.clients:

3373

name, client = tcp_server.clients.popitem()

2014

client = tcp_server.clients.pop()

3374

2015

if use_dbus:

3375

2016

client.remove_from_connection()

3376

# Don't signal the disabling

2017

client.disable_hook = None

2018

# Don't signal anything except ClientRemoved

3377

2019

client.disable(quiet=True)

3378

# Emit D-Bus signal for removal

3379

2020

if use_dbus:

3380

mandos_dbus_service.client_removed_signal(client)

3381

client_settings.clear()

2021

# Emit D-Bus signal

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2023

client.name)

3382

2024

3383

2025

atexit.register(cleanup)

3384

2026

3385

for client in tcp_server.clients.values():

2027

for client in tcp_server.clients:

3386

2028

if use_dbus:

3387

# Emit D-Bus signal for adding

3388

mandos_dbus_service.client_added_signal(client)

3389

# Need to initiate checking of clients

3390

if client.enabled:

3391

client.init_checker()

2029

# Emit D-Bus signal

2030

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2031

client.enable()

3392

2032

3393

2033

tcp_server.enable()

3394

2034

tcp_server.server_activate()

3395

2035

3396

2036

# Find out what port we got

3397

if zeroconf:

3398

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

2037

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

3399

2038

if use_ipv6:

3400

2039

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

3401

" flowinfo %d, scope_id %d",

3402

*tcp_server.socket.getsockname())

2040

" flowinfo %d, scope_id %d"

2041

% tcp_server.socket.getsockname())

3403

2042

else: # IPv4

3404

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

3405

*tcp_server.socket.getsockname())

2043

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

2044

% tcp_server.socket.getsockname())

3406

2045

3407

2046

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

3408

2047

3409

2048

try:

3410

if zeroconf:

3411

# From the Avahi example code

3412

try:

3413

service.activate()

3414

except dbus.exceptions.DBusException as error:

3415

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

3416

cleanup()

3417

sys.exit(1)

3418

# End of Avahi example code

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

3419

2057

3420

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

2058

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

3421

2059

lambda *args, **kwargs:

3422

2060

(tcp_server.handle_request

3423

2061

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

3425

2063

logger.debug("Starting main loop")

3426

2064

main_loop.run()

3427

2065

except AvahiError as error:

3428

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

2066

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

3429

2067

cleanup()

3430

2068

sys.exit(1)

3431

2069

except KeyboardInterrupt:

3436

2074

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

3437

2075

cleanup()

3438

2076

3439

3440

2077

if __name__ == '__main__':

3441

2078

main()