/mandos/trunk : revision 923

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#!/usr/bin/python2.7

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#!/usr/bin/python

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# -*- mode: python; coding: utf-8 -*-

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#

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#

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# Mandos server - give out binary blobs to connecting clients.

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#

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#

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# This program is partly derived from an example program for an Avahi

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# service publisher, downloaded from

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# <http://avahi.org/wiki/PythonPublishExample>. This includes the

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# methods "add", "remove", "server_state_changed",

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# "entry_group_state_changed", "cleanup", and "activate" in the

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

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#

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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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#

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# This file is part of Mandos.

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#

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

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

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# the Free Software Foundation, either version 3 of the License, or

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# (at your option) any later version.

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#

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# This program is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# Mandos is distributed in the hope that it will be useful, but

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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# You should have received a copy of the GNU General Public License

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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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# along with Mandos. If not, see <http://www.gnu.org/licenses/>.

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#

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

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#

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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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from future_builtins import *

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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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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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try:

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import ConfigParser as configparser

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except ImportError:

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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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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import avahi

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from gi.repository import GLib

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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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import xml.dom.minidom

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import inspect

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# Try to find the value of SO_BINDTODEVICE:

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try:

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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and

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# newer, and it is also the most natural place for it:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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# In Python 2.7 it seems to have been removed entirely.

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# Try running the C preprocessor:

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try:

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cc = subprocess.Popen(["cc", "--language=c", "-E",

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]

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SO_BINDTODEVICE = int(stdout.splitlines()[-1])

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except (OSError, ValueError, IndexError):

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# No value found

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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 = "1.6.9"

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version = "1.7.16"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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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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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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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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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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'--home', self.tempdir,

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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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'--quiet']

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

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

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

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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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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# 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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.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(['gpg', '--symmetric',

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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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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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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(['gpg', '--decrypt',

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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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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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class AvahiError(Exception):

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

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self.value = value

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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Attributes:

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interface: integer; avahi.IF_UNSPEC or an interface index.

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Used to optionally bind to the specified interface.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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interface=avahi.IF_UNSPEC,

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name=None,

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servicetype=None,

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port=None,

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TXT=None,

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domain="",

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host="",

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max_renames=32768,

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protocol=avahi.PROTO_UNSPEC,

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bus=None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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self.cleanup()

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os._exit(1)

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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359

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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logger.debug("Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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str(error))

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

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436

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def cleanup(self):

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

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if self.group is not None:

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pass

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self.group = None

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self.remove()

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380

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

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

382

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

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

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463

self.cleanup()

396

464

elif state == avahi.SERVER_RUNNING:

397

self.add()

465

try:

466

self.add()

467

except dbus.exceptions.DBusException as error:

468

if (error.get_dbus_name()

469

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

470

logger.info("Local Zeroconf service name"

471

" collision.")

472

return self.rename(remove=False)

473

else:

474

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

475

self.cleanup()

476

os._exit(1)

398

477

else:

399

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if error is None:

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

401

480

else:

402

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

403

482

404

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def activate(self):

405

484

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

406

485

if self.server is None:

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496

class AvahiServiceToSyslog(AvahiService):

418

497

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

419

498

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

420

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

499

ret = super(AvahiServiceToSyslog, self).rename(self, *args,

500

**kwargs)

421

501

syslogger.setFormatter(logging.Formatter(

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

423

503

.format(self.name)))

424

504

return ret

425

505

426

506

507

# Pretend that we have a GnuTLS module

508

class GnuTLS(object):

509

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

510

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

511

512

library = ctypes.util.find_library("gnutls")

513

if library is None:

514

library = ctypes.util.find_library("gnutls-deb0")

515

_library = ctypes.cdll.LoadLibrary(library)

516

del library

517

_need_version = b"3.3.0"

518

519

def __init__(self):

520

# Need to use "self" here, since this method is called before

521

# the assignment to the "gnutls" global variable happens.

522

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

523

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

524

.format(self._need_version))

525

526

# Unless otherwise indicated, the constants and types below are

527

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

528

529

# Constants

530

E_SUCCESS = 0

531

E_INTERRUPTED = -52

532

E_AGAIN = -28

533

CRT_OPENPGP = 2

534

CLIENT = 2

535

SHUT_RDWR = 0

536

CRD_CERTIFICATE = 1

537

E_NO_CERTIFICATE_FOUND = -49

538

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

539

540

# Types

541

class session_int(ctypes.Structure):

542

_fields_ = []

543

session_t = ctypes.POINTER(session_int)

544

545

class certificate_credentials_st(ctypes.Structure):

546

_fields_ = []

547

certificate_credentials_t = ctypes.POINTER(

548

certificate_credentials_st)

549

certificate_type_t = ctypes.c_int

550

551

class datum_t(ctypes.Structure):

552

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

553

('size', ctypes.c_uint)]

554

555

class openpgp_crt_int(ctypes.Structure):

556

_fields_ = []

557

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

558

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

559

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

560

credentials_type_t = ctypes.c_int

561

transport_ptr_t = ctypes.c_void_p

562

close_request_t = ctypes.c_int

563

564

# Exceptions

565

class Error(Exception):

566

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

567

# exception might be raised from within GnuTLS.__init__,

568

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

569

# global variable has happened.

570

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

571

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

572

# code is passed, convert it to a string with

573

# gnutls.strerror()

574

self.code = code

575

if message is None and code is not None:

576

message = GnuTLS.strerror(code)

577

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

578

message, *args)

579

580

class CertificateSecurityError(Error):

581

pass

582

583

# Classes

584

class Credentials(object):

585

def __init__(self):

586

self._c_object = gnutls.certificate_credentials_t()

587

gnutls.certificate_allocate_credentials(

588

ctypes.byref(self._c_object))

589

self.type = gnutls.CRD_CERTIFICATE

590

591

def __del__(self):

592

gnutls.certificate_free_credentials(self._c_object)

593

594

class ClientSession(object):

595

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

596

self._c_object = gnutls.session_t()

597

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

598

gnutls.set_default_priority(self._c_object)

599

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

600

gnutls.handshake_set_private_extensions(self._c_object,

601

True)

602

self.socket = socket

603

if credentials is None:

604

credentials = gnutls.Credentials()

605

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

606

ctypes.cast(credentials._c_object,

607

ctypes.c_void_p))

608

self.credentials = credentials

609

610

def __del__(self):

611

gnutls.deinit(self._c_object)

612

613

def handshake(self):

614

return gnutls.handshake(self._c_object)

615

616

def send(self, data):

617

data = bytes(data)

618

data_len = len(data)

619

while data_len > 0:

620

data_len -= gnutls.record_send(self._c_object,

621

data[-data_len:],

622

data_len)

623

624

def bye(self):

625

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

626

627

# Error handling functions

628

def _error_code(result):

629

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

630

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

631

if result >= 0:

632

return result

633

if result == gnutls.E_NO_CERTIFICATE_FOUND:

634

raise gnutls.CertificateSecurityError(code=result)

635

raise gnutls.Error(code=result)

636

637

def _retry_on_error(result, func, arguments):

638

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

639

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

640

while result < 0:

641

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

642

return _error_code(result)

643

result = func(*arguments)

644

return result

645

646

# Unless otherwise indicated, the function declarations below are

647

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

648

649

# Functions

650

priority_set_direct = _library.gnutls_priority_set_direct

651

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

652

ctypes.POINTER(ctypes.c_char_p)]

653

priority_set_direct.restype = _error_code

654

655

init = _library.gnutls_init

656

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

657

init.restype = _error_code

658

659

set_default_priority = _library.gnutls_set_default_priority

660

set_default_priority.argtypes = [session_t]

661

set_default_priority.restype = _error_code

662

663

record_send = _library.gnutls_record_send

664

record_send.argtypes = [session_t, ctypes.c_void_p,

665

ctypes.c_size_t]

666

record_send.restype = ctypes.c_ssize_t

667

record_send.errcheck = _retry_on_error

668

669

certificate_allocate_credentials = (

670

_library.gnutls_certificate_allocate_credentials)

671

certificate_allocate_credentials.argtypes = [

672

ctypes.POINTER(certificate_credentials_t)]

673

certificate_allocate_credentials.restype = _error_code

674

675

certificate_free_credentials = (

676

_library.gnutls_certificate_free_credentials)

677

certificate_free_credentials.argtypes = [

678

certificate_credentials_t]

679

certificate_free_credentials.restype = None

680

681

handshake_set_private_extensions = (

682

_library.gnutls_handshake_set_private_extensions)

683

handshake_set_private_extensions.argtypes = [session_t,

684

ctypes.c_int]

685

handshake_set_private_extensions.restype = None

686

687

credentials_set = _library.gnutls_credentials_set

688

credentials_set.argtypes = [session_t, credentials_type_t,

689

ctypes.c_void_p]

690

credentials_set.restype = _error_code

691

692

strerror = _library.gnutls_strerror

693

strerror.argtypes = [ctypes.c_int]

694

strerror.restype = ctypes.c_char_p

695

696

certificate_type_get = _library.gnutls_certificate_type_get

697

certificate_type_get.argtypes = [session_t]

698

certificate_type_get.restype = _error_code

699

700

certificate_get_peers = _library.gnutls_certificate_get_peers

701

certificate_get_peers.argtypes = [session_t,

702

ctypes.POINTER(ctypes.c_uint)]

703

certificate_get_peers.restype = ctypes.POINTER(datum_t)

704

705

global_set_log_level = _library.gnutls_global_set_log_level

706

global_set_log_level.argtypes = [ctypes.c_int]

707

global_set_log_level.restype = None

708

709

global_set_log_function = _library.gnutls_global_set_log_function

710

global_set_log_function.argtypes = [log_func]

711

global_set_log_function.restype = None

712

713

deinit = _library.gnutls_deinit

714

deinit.argtypes = [session_t]

715

deinit.restype = None

716

717

handshake = _library.gnutls_handshake

718

handshake.argtypes = [session_t]

719

handshake.restype = _error_code

720

handshake.errcheck = _retry_on_error

721

722

transport_set_ptr = _library.gnutls_transport_set_ptr

723

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

724

transport_set_ptr.restype = None

725

726

bye = _library.gnutls_bye

727

bye.argtypes = [session_t, close_request_t]

728

bye.restype = _error_code

729

bye.errcheck = _retry_on_error

730

731

check_version = _library.gnutls_check_version

732

check_version.argtypes = [ctypes.c_char_p]

733

check_version.restype = ctypes.c_char_p

734

735

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

736

737

openpgp_crt_init = _library.gnutls_openpgp_crt_init

738

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

739

openpgp_crt_init.restype = _error_code

740

741

openpgp_crt_import = _library.gnutls_openpgp_crt_import

742

openpgp_crt_import.argtypes = [openpgp_crt_t,

743

ctypes.POINTER(datum_t),

744

openpgp_crt_fmt_t]

745

openpgp_crt_import.restype = _error_code

746

747

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

748

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

749

ctypes.POINTER(ctypes.c_uint)]

750

openpgp_crt_verify_self.restype = _error_code

751

752

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

753

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

754

openpgp_crt_deinit.restype = None

755

756

openpgp_crt_get_fingerprint = (

757

_library.gnutls_openpgp_crt_get_fingerprint)

758

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

759

ctypes.c_void_p,

760

ctypes.POINTER(

761

ctypes.c_size_t)]

762

openpgp_crt_get_fingerprint.restype = _error_code

763

764

# Remove non-public functions

765

del _error_code, _retry_on_error

766

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

767

gnutls = GnuTLS()

768

769

770

def call_pipe(connection, # : multiprocessing.Connection

771

func, *args, **kwargs):

772

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

773

774

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

775

return value on the provided multiprocessing.Connection.

776

"""

777

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

778

connection.close()

779

780

427

781

class Client(object):

428

782

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

429

783

430

784

Attributes:

431

785

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

432

786

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

434

788

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

435

789

to see if the client lives.

436

790

'None' if no process is running.

437

checker_callback_tag: a gobject event source tag, or None

791

checker_callback_tag: a GLib event source tag, or None

438

792

checker_command: string; External command which is run to check

439

793

if client lives. %() expansions are done at

440

794

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

441

795

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

442

checker_initiator_tag: a gobject event source tag, or None

796

checker_initiator_tag: a GLib event source tag, or None

443

797

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

444

798

client_structure: Object describing what attributes a client has

445

799

and is used for storing the client at exit

446

800

current_checker_command: string; current running checker_command

447

disable_initiator_tag: a gobject event source tag, or None

801

disable_initiator_tag: a GLib event source tag, or None

448

802

enabled: bool()

449

803

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

450

804

uniquely identify the client

455

809

last_checker_status: integer between 0 and 255 reflecting exit

456

810

status of last checker. -1 reflects crashed

457

811

checker, -2 means no checker completed yet.

812

last_checker_signal: The signal which killed the last checker, if

813

last_checker_status is -1

458

814

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

459

815

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

460

816

D-Bus identifiers

467

823

disabled, or None

468

824

server_settings: The server_settings dict from main()

469

825

"""

470

826

471

827

runtime_expansions = ("approval_delay", "approval_duration",

472

828

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

473

829

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

484

840

"approved_by_default": "True",

485

841

"enabled": "True",

486

842

}

487

843

488

844

@staticmethod

489

845

def config_parser(config):

490

846

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

497

853

for client_name in config.sections():

498

854

section = dict(config.items(client_name))

499

855

client = settings[client_name] = {}

500

856

501

857

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

502

858

# Reformat values from string types to Python types

503

859

client["approved_by_default"] = config.getboolean(

504

860

client_name, "approved_by_default")

505

861

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

506

862

"enabled")

507

863

508

864

# Uppercase and remove spaces from fingerprint for later

509

865

# comparison purposes with return value from the

510

866

# fingerprint() function

511

867

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

512

868

.replace(" ", ""))

513

869

if "secret" in section:

514

client["secret"] = section["secret"].decode("base64")

870

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

871

.encode("utf-8"),

872

"base64")

515

873

elif "secfile" in section:

516

874

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

517

875

(section["secfile"])),

532

890

client["last_approval_request"] = None

533

891

client["last_checked_ok"] = None

534

892

client["last_checker_status"] = -2

535

893

536

894

return settings

537

538

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

895

896

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

539

897

self.name = name

540

898

if server_settings is None:

541

899

server_settings = {}

543

901

# adding all client settings

544

902

for setting, value in settings.items():

545

903

setattr(self, setting, value)

546

904

547

905

if self.enabled:

548

906

if not hasattr(self, "last_enabled"):

549

907

self.last_enabled = datetime.datetime.utcnow()

553

911

else:

554

912

self.last_enabled = None

555

913

self.expires = None

556

914

557

915

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

558

916

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

559

917

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

560

918

datetime.datetime.utcnow())

561

919

562

920

# attributes specific for this server instance

563

921

self.checker = None

564

922

self.checker_initiator_tag = None

570

928

self.changedstate = multiprocessing_manager.Condition(

571

929

multiprocessing_manager.Lock())

572

930

self.client_structure = [attr

573

for attr in self.__dict__.iterkeys()

931

for attr in self.__dict__.keys()

574

932

if not attr.startswith("_")]

575

933

self.client_structure.append("client_structure")

576

934

577

935

for name, t in inspect.getmembers(

578

936

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

579

937

if not name.startswith("_"):

580

938

self.client_structure.append(name)

581

939

582

940

# Send notice to process children that client state has changed

583

941

def send_changedstate(self):

584

942

with self.changedstate:

585

943

self.changedstate.notify_all()

586

944

587

945

def enable(self):

588

946

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

589

947

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

594

952

self.last_enabled = datetime.datetime.utcnow()

595

953

self.init_checker()

596

954

self.send_changedstate()

597

955

598

956

def disable(self, quiet=True):

599

957

"""Disable this client."""

600

958

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

602

960

if not quiet:

603

961

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

604

962

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

605

gobject.source_remove(self.disable_initiator_tag)

963

GLib.source_remove(self.disable_initiator_tag)

606

964

self.disable_initiator_tag = None

607

965

self.expires = None

608

966

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

609

gobject.source_remove(self.checker_initiator_tag)

967

GLib.source_remove(self.checker_initiator_tag)

610

968

self.checker_initiator_tag = None

611

969

self.stop_checker()

612

970

self.enabled = False

613

971

if not quiet:

614

972

self.send_changedstate()

615

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

973

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

616

974

return False

617

975

618

976

def __del__(self):

619

977

self.disable()

620

978

621

979

def init_checker(self):

622

980

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

623

981

# and every interval from then on.

624

982

if self.checker_initiator_tag is not None:

625

gobject.source_remove(self.checker_initiator_tag)

626

self.checker_initiator_tag = gobject.timeout_add(

983

GLib.source_remove(self.checker_initiator_tag)

984

self.checker_initiator_tag = GLib.timeout_add(

627

985

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

628

986

self.start_checker)

629

987

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

630

988

if self.disable_initiator_tag is not None:

631

gobject.source_remove(self.disable_initiator_tag)

632

self.disable_initiator_tag = gobject.timeout_add(

989

GLib.source_remove(self.disable_initiator_tag)

990

self.disable_initiator_tag = GLib.timeout_add(

633

991

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

634

992

# Also start a new checker *right now*.

635

993

self.start_checker()

636

637

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

994

995

def checker_callback(self, source, condition, connection,

996

command):

638

997

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

639

998

self.checker_callback_tag = None

640

999

self.checker = None

641

if os.WIFEXITED(condition):

642

self.last_checker_status = os.WEXITSTATUS(condition)

1000

# Read return code from connection (see call_pipe)

1001

returncode = connection.recv()

1002

connection.close()

1003

1004

if returncode >= 0:

1005

self.last_checker_status = returncode

1006

self.last_checker_signal = None

643

1007

if self.last_checker_status == 0:

644

1008

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

645

1009

vars(self))

648

1012

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

649

1013

else:

650

1014

self.last_checker_status = -1

1015

self.last_checker_signal = -returncode

651

1016

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

652

1017

vars(self))

653

1018

return False

1019

654

1020

def checked_ok(self):

655

1021

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

656

1022

self.last_checked_ok = datetime.datetime.utcnow()

657

1023

self.last_checker_status = 0

1024

self.last_checker_signal = None

658

1025

self.bump_timeout()

659

1026

660

1027

def bump_timeout(self, timeout=None):

661

1028

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

662

1029

if timeout is None:

663

1030

timeout = self.timeout

664

1031

if self.disable_initiator_tag is not None:

665

gobject.source_remove(self.disable_initiator_tag)

1032

GLib.source_remove(self.disable_initiator_tag)

666

1033

self.disable_initiator_tag = None

667

1034

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

668

self.disable_initiator_tag = gobject.timeout_add(

1035

self.disable_initiator_tag = GLib.timeout_add(

669

1036

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

670

1037

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

671

1038

672

1039

def need_approval(self):

673

1040

self.last_approval_request = datetime.datetime.utcnow()

674

1041

675

1042

def start_checker(self):

676

1043

"""Start a new checker subprocess if one is not running.

677

1044

678

1045

If a checker already exists, leave it running and do

679

1046

nothing."""

680

1047

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

685

1052

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

686

1053

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

687

1054

# should be.

688

689

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

690

try:

691

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

692

except AttributeError:

693

pass

694

except OSError as error:

695

if error.errno != errno.ECHILD:

696

raise

697

else:

698

if pid:

699

logger.warning("Checker was a zombie")

700

gobject.source_remove(self.checker_callback_tag)

701

self.checker_callback(pid, status,

702

self.current_checker_command)

1055

1056

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

1057

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

1058

self.checker.join()

1059

self.checker = None

703

1060

# Start a new checker if needed

704

1061

if self.checker is None:

705

1062

# Escape attributes for the shell

706

1063

escaped_attrs = {

707

1064

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

708

for attr in self.runtime_expansions }

1065

for attr in self.runtime_expansions}

709

1066

try:

710

1067

command = self.checker_command % escaped_attrs

711

1068

except TypeError as error:

714

1071

exc_info=error)

715

1072

return True # Try again later

716

1073

self.current_checker_command = command

717

try:

718

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

719

self.name)

720

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

721

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

722

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

723

# always replaced by /dev/null.)

724

# The exception is when not debugging but nevertheless

725

# running in the foreground; use the previously

726

# created wnull.

727

popen_args = {}

728

if (not self.server_settings["debug"]

729

and self.server_settings["foreground"]):

730

popen_args.update({"stdout": wnull,

731

"stderr": wnull })

732

self.checker = subprocess.Popen(command,

733

close_fds=True,

734

shell=True,

735

cwd="/",

736

**popen_args)

737

except OSError as error:

738

logger.error("Failed to start subprocess",

739

exc_info=error)

740

return True

741

self.checker_callback_tag = gobject.child_watch_add(

742

self.checker.pid, self.checker_callback, data=command)

743

# The checker may have completed before the gobject

744

# watch was added. Check for this.

745

try:

746

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

747

except OSError as error:

748

if error.errno == errno.ECHILD:

749

# This should never happen

750

logger.error("Child process vanished",

751

exc_info=error)

752

return True

753

raise

754

if pid:

755

gobject.source_remove(self.checker_callback_tag)

756

self.checker_callback(pid, status, command)

757

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

1074

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

1075

self.name)

1076

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

1077

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

1078

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

1079

# always replaced by /dev/null.)

1080

# The exception is when not debugging but nevertheless

1081

# running in the foreground; use the previously

1082

# created wnull.

1083

popen_args = {"close_fds": True,

1084

"shell": True,

1085

"cwd": "/"}

1086

if (not self.server_settings["debug"]

1087

and self.server_settings["foreground"]):

1088

popen_args.update({"stdout": wnull,

1089

"stderr": wnull})

1090

pipe = multiprocessing.Pipe(duplex=False)

1091

self.checker = multiprocessing.Process(

1092

target=call_pipe,

1093

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

1094

kwargs=popen_args)

1095

self.checker.start()

1096

self.checker_callback_tag = GLib.io_add_watch(

1097

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

1098

self.checker_callback, pipe[0], command)

1099

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

758

1100

return True

759

1101

760

1102

def stop_checker(self):

761

1103

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

762

1104

if self.checker_callback_tag:

763

gobject.source_remove(self.checker_callback_tag)

1105

GLib.source_remove(self.checker_callback_tag)

764

1106

self.checker_callback_tag = None

765

1107

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

766

1108

return

767

1109

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

768

try:

769

self.checker.terminate()

770

#time.sleep(0.5)

771

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

772

# self.checker.kill()

773

except OSError as error:

774

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

775

raise

1110

self.checker.terminate()

776

1111

self.checker = None

777

1112

778

1113

782

1117

byte_arrays=False):

783

1118

"""Decorators for marking methods of a DBusObjectWithProperties to

784

1119

become properties on the D-Bus.

785

1120

786

1121

The decorated method will be called with no arguments by "Get"

787

1122

and with one argument by "Set".

788

1123

789

1124

The parameters, where they are supported, are the same as

790

1125

dbus.service.method, except there is only "signature", since the

791

1126

type from Get() and the type sent to Set() is the same.

795

1130

if byte_arrays and signature != "ay":

796

1131

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

797

1132

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

798

1133

799

1134

def decorator(func):

800

1135

func._dbus_is_property = True

801

1136

func._dbus_interface = dbus_interface

804

1139

func._dbus_name = func.__name__

805

1140

if func._dbus_name.endswith("_dbus_property"):

806

1141

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

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1142

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

808

1143

return func

809

1144

810

1145

return decorator

811

1146

812

1147

813

1148

def dbus_interface_annotations(dbus_interface):

814

1149

"""Decorator for marking functions returning interface annotations

815

1150

816

1151

Usage:

817

1152

818

1153

@dbus_interface_annotations("org.example.Interface")

819

1154

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

820

1155

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

821

1156

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

822

1157

"false"}

823

1158

"""

824

1159

825

1160

def decorator(func):

826

1161

func._dbus_is_interface = True

827

1162

func._dbus_interface = dbus_interface

828

1163

func._dbus_name = dbus_interface

829

1164

return func

830

1165

831

1166

return decorator

832

1167

833

1168

834

1169

def dbus_annotations(annotations):

835

1170

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

836

1171

Usage:

837

1172

838

1173

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

839

1174

"org.freedesktop.DBus.Property."

840

1175

"EmitsChangedSignal": "false"})

842

1177

access="r")

843

1178

def Property_dbus_property(self):

844

1179

return dbus.Boolean(False)

1180

1181

See also the DBusObjectWithAnnotations class.

845

1182

"""

846

1183

847

1184

def decorator(func):

848

1185

func._dbus_annotations = annotations

849

1186

return func

850

1187

851

1188

return decorator

852

1189

853

1190

869

1206

pass

870

1207

871

1208

872

class DBusObjectWithProperties(dbus.service.Object):

873

"""A D-Bus object with properties.

874

875

Classes inheriting from this can use the dbus_service_property

876

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

877

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

1209

class DBusObjectWithAnnotations(dbus.service.Object):

1210

"""A D-Bus object with annotations.

1211

1212

Classes inheriting from this can use the dbus_annotations

1213

decorator to add annotations to methods or signals.

878

1214

"""

879

1215

880

1216

@staticmethod

881

1217

def _is_dbus_thing(thing):

882

1218

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

883

1219

884

1220

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

885

1221

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

886

1222

"""

887

1223

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

888

1224

False)

889

1225

890

1226

def _get_all_dbus_things(self, thing):

891

1227

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

892

1228

"""

895

1231

for cls in self.__class__.__mro__

896

1232

for name, athing in

897

1233

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

898

1234

1235

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1236

out_signature="s",

1237

path_keyword='object_path',

1238

connection_keyword='connection')

1239

def Introspect(self, object_path, connection):

1240

"""Overloading of standard D-Bus method.

1241

1242

Inserts annotation tags on methods and signals.

1243

"""

1244

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

1245

connection)

1246

try:

1247

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

1248

1249

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

1250

# Add annotation tags

1251

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

1252

for tag in if_tag.getElementsByTagName(typ):

1253

annots = dict()

1254

for name, prop in (self.

1255

_get_all_dbus_things(typ)):

1256

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

1257

and prop._dbus_interface

1258

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

1259

annots.update(getattr(

1260

prop, "_dbus_annotations", {}))

1261

for name, value in annots.items():

1262

ann_tag = document.createElement(

1263

"annotation")

1264

ann_tag.setAttribute("name", name)

1265

ann_tag.setAttribute("value", value)

1266

tag.appendChild(ann_tag)

1267

# Add interface annotation tags

1268

for annotation, value in dict(

1269

itertools.chain.from_iterable(

1270

annotations().items()

1271

for name, annotations

1272

in self._get_all_dbus_things("interface")

1273

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

1274

)).items():

1275

ann_tag = document.createElement("annotation")

1276

ann_tag.setAttribute("name", annotation)

1277

ann_tag.setAttribute("value", value)

1278

if_tag.appendChild(ann_tag)

1279

# Fix argument name for the Introspect method itself

1280

if (if_tag.getAttribute("name")

1281

== dbus.INTROSPECTABLE_IFACE):

1282

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

1283

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

1284

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

1285

if (arg.getAttribute("direction")

1286

== "out"):

1287

arg.setAttribute("name",

1288

"xml_data")

1289

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

1290

document.unlink()

1291

except (AttributeError, xml.dom.DOMException,

1292

xml.parsers.expat.ExpatError) as error:

1293

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

1294

exc_info=error)

1295

return xmlstring

1296

1297

1298

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1299

"""A D-Bus object with properties.

1300

1301

Classes inheriting from this can use the dbus_service_property

1302

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

1303

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

1304

"""

1305

899

1306

def _get_dbus_property(self, interface_name, property_name):

900

1307

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

901

1308

property with the specified name and interface.

906

1313

if (value._dbus_name == property_name

907

1314

and value._dbus_interface == interface_name):

908

1315

return value.__get__(self)

909

1316

910

1317

# No such property

911

1318

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

912

1319

self.dbus_object_path, interface_name, property_name))

913

1320

1321

@classmethod

1322

def _get_all_interface_names(cls):

1323

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

1324

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

1325

"_dbus_interface", None)

1326

for x in (inspect.getmro(cls))

1327

for attr in dir(x))

1328

if name is not None)

1329

914

1330

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

1331

in_signature="ss",

916

1332

out_signature="v")

924

1340

if not hasattr(value, "variant_level"):

925

1341

return value

926

1342

return type(value)(value, variant_level=value.variant_level+1)

927

1343

928

1344

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")

929

1345

def Set(self, interface_name, property_name, value):

930

1346

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

942

1358

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

943

1359

for byte in value))

944

1360

prop(value)

945

1361

946

1362

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

1363

in_signature="s",

948

1364

out_signature="a{sv}")

949

1365

def GetAll(self, interface_name):

950

1366

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

951

1367

standard.

952

1368

953

1369

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

954

1370

"""

955

1371

properties = {}

966

1382

properties[name] = value

967

1383

continue

968

1384

properties[name] = type(value)(

969

value, variant_level = value.variant_level + 1)

1385

value, variant_level=value.variant_level + 1)

970

1386

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

971

1387

972

1388

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

973

1389

def PropertiesChanged(self, interface_name, changed_properties,

974

1390

invalidated_properties):

976

1392

standard.

977

1393

"""

978

1394

pass

979

1395

980

1396

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

981

1397

out_signature="s",

982

1398

path_keyword='object_path',

983

1399

connection_keyword='connection')

984

1400

def Introspect(self, object_path, connection):

985

1401

"""Overloading of standard D-Bus method.

986

1402

987

1403

Inserts property tags and interface annotation tags.

988

1404

"""

989

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

990

connection)

1405

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1406

object_path,

1407

connection)

991

1408

try:

992

1409

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

993

1410

994

1411

def make_tag(document, name, prop):

995

1412

e = document.createElement("property")

996

1413

e.setAttribute("name", name)

997

1414

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

998

1415

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

999

1416

return e

1000

1417

1001

1418

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

1002

1419

# Add property tags

1003

1420

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

1006

1423

if prop._dbus_interface

1007

1424

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

1008

1425

if_tag.appendChild(tag)

1009

# Add annotation tags

1010

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

1011

for tag in if_tag.getElementsByTagName(typ):

1012

annots = dict()

1013

for name, prop in (self.

1014

_get_all_dbus_things(typ)):

1015

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

1016

and prop._dbus_interface

1017

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

1018

annots.update(getattr(

1019

prop, "_dbus_annotations", {}))

1020

for name, value in annots.items():

1021

ann_tag = document.createElement(

1022

"annotation")

1023

ann_tag.setAttribute("name", name)

1024

ann_tag.setAttribute("value", value)

1025

tag.appendChild(ann_tag)

1026

# Add interface annotation tags

1027

for annotation, value in dict(

1028

itertools.chain.from_iterable(

1029

annotations().items()

1030

for name, annotations

1031

in self._get_all_dbus_things("interface")

1032

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

1033

)).items():

1034

ann_tag = document.createElement("annotation")

1035

ann_tag.setAttribute("name", annotation)

1036

ann_tag.setAttribute("value", value)

1037

if_tag.appendChild(ann_tag)

1426

# Add annotation tags for properties

1427

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

1428

annots = dict()

1429

for name, prop in self._get_all_dbus_things(

1430

"property"):

1431

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

1432

and prop._dbus_interface

1433

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

1434

annots.update(getattr(

1435

prop, "_dbus_annotations", {}))

1436

for name, value in annots.items():

1437

ann_tag = document.createElement(

1438

"annotation")

1439

ann_tag.setAttribute("name", name)

1440

ann_tag.setAttribute("value", value)

1441

tag.appendChild(ann_tag)

1038

1442

# Add the names to the return values for the

1039

1443

# "org.freedesktop.DBus.Properties" methods

1040

1444

if (if_tag.getAttribute("name")

1059

1463

return xmlstring

1060

1464

1061

1465

1466

try:

1467

dbus.OBJECT_MANAGER_IFACE

1468

except AttributeError:

1469

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

1470

1471

1472

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1473

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

1474

1475

Classes inheriting from this exposes the standard

1476

GetManagedObjects call and the InterfacesAdded and

1477

InterfacesRemoved signals on the standard

1478

"org.freedesktop.DBus.ObjectManager" interface.

1479

1480

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

1481

manually.

1482

"""

1483

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1484

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

1485

def GetManagedObjects(self):

1486

"""This function must be overridden"""

1487

raise NotImplementedError()

1488

1489

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1490

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

1491

def InterfacesAdded(self, object_path, interfaces_and_properties):

1492

pass

1493

1494

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

1495

def InterfacesRemoved(self, object_path, interfaces):

1496

pass

1497

1498

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1499

out_signature="s",

1500

path_keyword='object_path',

1501

connection_keyword='connection')

1502

def Introspect(self, object_path, connection):

1503

"""Overloading of standard D-Bus method.

1504

1505

Override return argument name of GetManagedObjects to be

1506

"objpath_interfaces_and_properties"

1507

"""

1508

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1509

object_path,

1510

connection)

1511

try:

1512

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

1513

1514

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

1515

# Fix argument name for the GetManagedObjects method

1516

if (if_tag.getAttribute("name")

1517

== dbus.OBJECT_MANAGER_IFACE):

1518

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

1519

if (cn.getAttribute("name")

1520

== "GetManagedObjects"):

1521

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

1522

if (arg.getAttribute("direction")

1523

== "out"):

1524

arg.setAttribute(

1525

"name",

1526

"objpath_interfaces"

1527

"_and_properties")

1528

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

1529

document.unlink()

1530

except (AttributeError, xml.dom.DOMException,

1531

xml.parsers.expat.ExpatError) as error:

1532

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

1533

exc_info=error)

1534

return xmlstring

1535

1536

1062

1537

def datetime_to_dbus(dt, variant_level=0):

1063

1538

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

1064

1539

if dt is None:

1065

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

1540

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

1066

1541

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

1067

1542

1068

1543

1071

1546

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

1072

1547

interface names according to the "alt_interface_names" mapping.

1073

1548

Usage:

1074

1549

1075

1550

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

1076

1551

"net.example.AlternateInterface"})

1077

1552

class SampleDBusObject(dbus.service.Object):

1078

1553

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

1079

1554

def SampleDBusMethod():

1080

1555

pass

1081

1556

1082

1557

The above "SampleDBusMethod" on "SampleDBusObject" will be

1083

1558

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

1084

1559

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

1085

1560

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

1086

1561

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

1087

1562

1088

1563

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

1089

1564

(from DBusObjectWithProperties) and interfaces (from the

1090

1565

dbus_interface_annotations decorator).

1091

1566

"""

1092

1567

1093

1568

def wrapper(cls):

1094

1569

for orig_interface_name, alt_interface_name in (

1095

1570

alt_interface_names.items()):

1112

1587

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

1113

1588

# Extract the original non-method undecorated

1114

1589

# function by black magic

1115

nonmethod_func = (dict(

1116

zip(attribute.func_code.co_freevars,

1117

attribute.__closure__))

1118

["func"].cell_contents)

1590

if sys.version_info.major == 2:

1591

nonmethod_func = (dict(

1592

zip(attribute.func_code.co_freevars,

1593

attribute.__closure__))

1594

["func"].cell_contents)

1595

else:

1596

nonmethod_func = (dict(

1597

zip(attribute.__code__.co_freevars,

1598

attribute.__closure__))

1599

["func"].cell_contents)

1119

1600

# Create a new, but exactly alike, function

1120

1601

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

1121

1602

# with the alternate D-Bus interface name

1603

new_function = copy_function(nonmethod_func)

1122

1604

new_function = (dbus.service.signal(

1123

alt_interface, attribute._dbus_signature)

1124

(types.FunctionType(

1125

nonmethod_func.func_code,

1126

nonmethod_func.func_globals,

1127

nonmethod_func.func_name,

1128

nonmethod_func.func_defaults,

1129

nonmethod_func.func_closure)))

1605

alt_interface,

1606

attribute._dbus_signature)(new_function))

1130

1607

# Copy annotations, if any

1131

1608

try:

1132

1609

new_function._dbus_annotations = dict(

1133

1610

attribute._dbus_annotations)

1134

1611

except AttributeError:

1135

1612

pass

1613

1136

1614

# Define a creator of a function to call both the

1137

1615

# original and alternate functions, so both the

1138

1616

# original and alternate signals gets sent when

1141

1619

"""This function is a scope container to pass

1142

1620

func1 and func2 to the "call_both" function

1143

1621

outside of its arguments"""

1144

1622

1623

@functools.wraps(func2)

1145

1624

def call_both(*args, **kwargs):

1146

1625

"""This function will emit two D-Bus

1147

1626

signals by calling func1 and func2"""

1148

1627

func1(*args, **kwargs)

1149

1628

func2(*args, **kwargs)

1150

1629

# Make wrapper function look like a D-Bus

1630

# signal

1631

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

1632

if name.startswith("_dbus_"):

1633

setattr(call_both, name, attr)

1634

1151

1635

return call_both

1152

1636

# Create the "call_both" function and add it to

1153

1637

# the class

1163

1647

alt_interface,

1164

1648

attribute._dbus_in_signature,

1165

1649

attribute._dbus_out_signature)

1166

(types.FunctionType(attribute.func_code,

1167

attribute.func_globals,

1168

attribute.func_name,

1169

attribute.func_defaults,

1170

attribute.func_closure)))

1650

(copy_function(attribute)))

1171

1651

# Copy annotations, if any

1172

1652

try:

1173

1653

attr[attrname]._dbus_annotations = dict(

1185

1665

attribute._dbus_access,

1186

1666

attribute._dbus_get_args_options

1187

1667

["byte_arrays"])

1188

(types.FunctionType(

1189

attribute.func_code,

1190

attribute.func_globals,

1191

attribute.func_name,

1192

attribute.func_defaults,

1193

attribute.func_closure)))

1668

(copy_function(attribute)))

1194

1669

# Copy annotations, if any

1195

1670

try:

1196

1671

attr[attrname]._dbus_annotations = dict(

1205

1680

# to the class.

1206

1681

attr[attrname] = (

1207

1682

dbus_interface_annotations(alt_interface)

1208

(types.FunctionType(attribute.func_code,

1209

attribute.func_globals,

1210

attribute.func_name,

1211

attribute.func_defaults,

1212

attribute.func_closure)))

1683

(copy_function(attribute)))

1213

1684

if deprecate:

1214

1685

# Deprecate all alternate interfaces

1215

iname="_AlternateDBusNames_interface_annotation{}"

1686

iname = "_AlternateDBusNames_interface_annotation{}"

1216

1687

for interface_name in interface_names:

1217

1688

1218

1689

@dbus_interface_annotations(interface_name)

1219

1690

def func(self):

1220

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

1221

"true" }

1691

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

1692

"true"}

1222

1693

# Find an unused name

1223

1694

for aname in (iname.format(i)

1224

1695

for i in itertools.count()):

1228

1699

if interface_names:

1229

1700

# Replace the class with a new subclass of it with

1230

1701

# methods, signals, etc. as created above.

1231

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

1232

(cls, ), attr)

1702

if sys.version_info.major == 2:

1703

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

1704

(cls, ), attr)

1705

else:

1706

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

1707

(cls, ), attr)

1233

1708

return cls

1234

1709

1235

1710

return wrapper

1236

1711

1237

1712

1239

1714

"se.bsnet.fukt.Mandos"})

1240

1715

class ClientDBus(Client, DBusObjectWithProperties):

1241

1716

"""A Client class using D-Bus

1242

1717

1243

1718

Attributes:

1244

1719

dbus_object_path: dbus.ObjectPath

1245

1720

bus: dbus.SystemBus()

1246

1721

"""

1247

1722

1248

1723

runtime_expansions = (Client.runtime_expansions

1249

1724

+ ("dbus_object_path", ))

1250

1725

1251

1726

_interface = "se.recompile.Mandos.Client"

1252

1727

1253

1728

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

1254

1255

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

1729

1730

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

1256

1731

self.bus = bus

1257

1732

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

1258

1733

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

1264

1739

"/clients/" + client_object_name)

1265

1740

DBusObjectWithProperties.__init__(self, self.bus,

1266

1741

self.dbus_object_path)

1267

1742

1268

1743

def notifychangeproperty(transform_func, dbus_name,

1269

1744

type_func=lambda x: x,

1270

1745

variant_level=1,

1272

1747

_interface=_interface):

1273

1748

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

1274

1749

its changes to DBus.

1275

1750

1276

1751

transform_fun: Function that takes a value and a variant_level

1277

1752

and transforms it to a D-Bus type.

1278

1753

dbus_name: D-Bus name of the variable

1281

1756

variant_level: D-Bus variant level. Default: 1

1282

1757

"""

1283

1758

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

1284

1759

1285

1760

def setter(self, value):

1286

1761

if hasattr(self, "dbus_object_path"):

1287

1762

if (not hasattr(self, attrname) or

1294

1769

else:

1295

1770

dbus_value = transform_func(

1296

1771

type_func(value),

1297

variant_level = variant_level)

1772

variant_level=variant_level)

1298

1773

self.PropertyChanged(dbus.String(dbus_name),

1299

1774

dbus_value)

1300

1775

self.PropertiesChanged(

1301

1776

_interface,

1302

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

1303

dbus_value }),

1777

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

1778

dbus_value}),

1304

1779

dbus.Array())

1305

1780

setattr(self, attrname, value)

1306

1781

1307

1782

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

1308

1783

1309

1784

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1310

1785

approvals_pending = notifychangeproperty(dbus.Boolean,

1311

1786

"ApprovalPending",

1312

type_func = bool)

1787

type_func=bool)

1313

1788

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

1314

1789

last_enabled = notifychangeproperty(datetime_to_dbus,

1315

1790

"LastEnabled")

1316

1791

checker = notifychangeproperty(

1317

1792

dbus.Boolean, "CheckerRunning",

1318

type_func = lambda checker: checker is not None)

1793

type_func=lambda checker: checker is not None)

1319

1794

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1320

1795

"LastCheckedOK")

1321

1796

last_checker_status = notifychangeproperty(dbus.Int16,

1326

1801

"ApprovedByDefault")

1327

1802

approval_delay = notifychangeproperty(

1328

1803

dbus.UInt64, "ApprovalDelay",

1329

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

1804

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

1330

1805

approval_duration = notifychangeproperty(

1331

1806

dbus.UInt64, "ApprovalDuration",

1332

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

1807

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

1333

1808

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

1334

1809

timeout = notifychangeproperty(

1335

1810

dbus.UInt64, "Timeout",

1336

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

1811

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

1337

1812

extended_timeout = notifychangeproperty(

1338

1813

dbus.UInt64, "ExtendedTimeout",

1339

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

1814

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

1340

1815

interval = notifychangeproperty(

1341

1816

dbus.UInt64, "Interval",

1342

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

1817

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

1343

1818

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

1344

1819

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

1345

1820

invalidate_only=True)

1346

1821

1347

1822

del notifychangeproperty

1348

1823

1349

1824

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

1350

1825

try:

1351

1826

self.remove_from_connection()

1354

1829

if hasattr(DBusObjectWithProperties, "__del__"):

1355

1830

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

1356

1831

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

1357

1358

def checker_callback(self, pid, condition, command,

1359

*args, **kwargs):

1360

self.checker_callback_tag = None

1361

self.checker = None

1362

if os.WIFEXITED(condition):

1363

exitstatus = os.WEXITSTATUS(condition)

1832

1833

def checker_callback(self, source, condition,

1834

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

1835

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

1836

connection, command, *args,

1837

**kwargs)

1838

exitstatus = self.last_checker_status

1839

if exitstatus >= 0:

1364

1840

# Emit D-Bus signal

1365

1841

self.CheckerCompleted(dbus.Int16(exitstatus),

1366

dbus.Int64(condition),

1842

# This is specific to GNU libC

1843

dbus.Int64(exitstatus << 8),

1367

1844

dbus.String(command))

1368

1845

else:

1369

1846

# Emit D-Bus signal

1370

1847

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

1371

dbus.Int64(condition),

1848

dbus.Int64(

1849

# This is specific to GNU libC

1850

(exitstatus << 8)

1851

| self.last_checker_signal),

1372

1852

dbus.String(command))

1373

1374

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

1375

*args, **kwargs)

1376

1853

return ret

1854

1377

1855

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

1378

1856

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

1379

1857

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

1383

1861

# Emit D-Bus signal

1384

1862

self.CheckerStarted(self.current_checker_command)

1385

1863

return r

1386

1864

1387

1865

def _reset_approved(self):

1388

1866

self.approved = None

1389

1867

return False

1390

1868

1391

1869

def approve(self, value=True):

1392

1870

self.approved = value

1393

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

1394

* 1000), self._reset_approved)

1871

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

1872

* 1000), self._reset_approved)

1395

1873

self.send_changedstate()

1396

1397

## D-Bus methods, signals & properties

1398

1399

## Interfaces

1400

1401

## Signals

1402

1874

1875

# D-Bus methods, signals & properties

1876

1877

# Interfaces

1878

1879

# Signals

1880

1403

1881

# CheckerCompleted - signal

1404

1882

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

1405

1883

def CheckerCompleted(self, exitcode, waitstatus, command):

1406

1884

"D-Bus signal"

1407

1885

pass

1408

1886

1409

1887

# CheckerStarted - signal

1410

1888

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

1411

1889

def CheckerStarted(self, command):

1412

1890

"D-Bus signal"

1413

1891

pass

1414

1892

1415

1893

# PropertyChanged - signal

1416

1894

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

1417

1895

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

1418

1896

def PropertyChanged(self, property, value):

1419

1897

"D-Bus signal"

1420

1898

pass

1421

1899

1422

1900

# GotSecret - signal

1423

1901

@dbus.service.signal(_interface)

1424

1902

def GotSecret(self):

1427

1905

server to mandos-client

1428

1906

"""

1429

1907

pass

1430

1908

1431

1909

# Rejected - signal

1432

1910

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

1433

1911

def Rejected(self, reason):

1434

1912

"D-Bus signal"

1435

1913

pass

1436

1914

1437

1915

# NeedApproval - signal

1438

1916

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

1439

1917

def NeedApproval(self, timeout, default):

1440

1918

"D-Bus signal"

1441

1919

return self.need_approval()

1442

1443

## Methods

1444

1920

1921

# Methods

1922

1445

1923

# Approve - method

1446

1924

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

1447

1925

def Approve(self, value):

1448

1926

self.approve(value)

1449

1927

1450

1928

# CheckedOK - method

1451

1929

@dbus.service.method(_interface)

1452

1930

def CheckedOK(self):

1453

1931

self.checked_ok()

1454

1932

1455

1933

# Enable - method

1934

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

1456

1935

@dbus.service.method(_interface)

1457

1936

def Enable(self):

1458

1937

"D-Bus method"

1459

1938

self.enable()

1460

1939

1461

1940

# StartChecker - method

1941

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

1462

1942

@dbus.service.method(_interface)

1463

1943

def StartChecker(self):

1464

1944

"D-Bus method"

1465

1945

self.start_checker()

1466

1946

1467

1947

# Disable - method

1948

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

1468

1949

@dbus.service.method(_interface)

1469

1950

def Disable(self):

1470

1951

"D-Bus method"

1471

1952

self.disable()

1472

1953

1473

1954

# StopChecker - method

1955

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

1474

1956

@dbus.service.method(_interface)

1475

1957

def StopChecker(self):

1476

1958

self.stop_checker()

1477

1478

## Properties

1479

1959

1960

# Properties

1961

1480

1962

# ApprovalPending - property

1481

1963

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

1482

1964

def ApprovalPending_dbus_property(self):

1483

1965

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

1484

1966

1485

1967

# ApprovedByDefault - property

1486

1968

@dbus_service_property(_interface,

1487

1969

signature="b",

1490

1972

if value is None: # get

1491

1973

return dbus.Boolean(self.approved_by_default)

1492

1974

self.approved_by_default = bool(value)

1493

1975

1494

1976

# ApprovalDelay - property

1495

1977

@dbus_service_property(_interface,

1496

1978

signature="t",

1500

1982

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

1501

1983

* 1000)

1502

1984

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

1503

1985

1504

1986

# ApprovalDuration - property

1505

1987

@dbus_service_property(_interface,

1506

1988

signature="t",

1510

1992

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

1511

1993

* 1000)

1512

1994

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

1513

1995

1514

1996

# Name - property

1997

@dbus_annotations(

1998

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

1515

1999

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

1516

2000

def Name_dbus_property(self):

1517

2001

return dbus.String(self.name)

1518

2002

1519

2003

# Fingerprint - property

2004

@dbus_annotations(

2005

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

1520

2006

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

1521

2007

def Fingerprint_dbus_property(self):

1522

2008

return dbus.String(self.fingerprint)

1523

2009

1524

2010

# Host - property

1525

2011

@dbus_service_property(_interface,

1526

2012

signature="s",

1529

2015

if value is None: # get

1530

2016

return dbus.String(self.host)

1531

2017

self.host = str(value)

1532

2018

1533

2019

# Created - property

2020

@dbus_annotations(

2021

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

1534

2022

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

1535

2023

def Created_dbus_property(self):

1536

2024

return datetime_to_dbus(self.created)

1537

2025

1538

2026

# LastEnabled - property

1539

2027

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

1540

2028

def LastEnabled_dbus_property(self):

1541

2029

return datetime_to_dbus(self.last_enabled)

1542

2030

1543

2031

# Enabled - property

1544

2032

@dbus_service_property(_interface,

1545

2033

signature="b",

1551

2039

self.enable()

1552

2040

else:

1553

2041

self.disable()

1554

2042

1555

2043

# LastCheckedOK - property

1556

2044

@dbus_service_property(_interface,

1557

2045

signature="s",

1561

2049

self.checked_ok()

1562

2050

return

1563

2051

return datetime_to_dbus(self.last_checked_ok)

1564

2052

1565

2053

# LastCheckerStatus - property

1566

2054

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

1567

2055

def LastCheckerStatus_dbus_property(self):

1568

2056

return dbus.Int16(self.last_checker_status)

1569

2057

1570

2058

# Expires - property

1571

2059

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

1572

2060

def Expires_dbus_property(self):

1573

2061

return datetime_to_dbus(self.expires)

1574

2062

1575

2063

# LastApprovalRequest - property

1576

2064

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

1577

2065

def LastApprovalRequest_dbus_property(self):

1578

2066

return datetime_to_dbus(self.last_approval_request)

1579

2067

1580

2068

# Timeout - property

1581

2069

@dbus_service_property(_interface,

1582

2070

signature="t",

1597

2085

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

1598

2086

is None):

1599

2087

return

1600

gobject.source_remove(self.disable_initiator_tag)

1601

self.disable_initiator_tag = gobject.timeout_add(

2088

GLib.source_remove(self.disable_initiator_tag)

2089

self.disable_initiator_tag = GLib.timeout_add(

1602

2090

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

1603

2091

self.disable)

1604

2092

1605

2093

# ExtendedTimeout - property

1606

2094

@dbus_service_property(_interface,

1607

2095

signature="t",

1611

2099

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

1612

2100

* 1000)

1613

2101

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

1614

2102

1615

2103

# Interval - property

1616

2104

@dbus_service_property(_interface,

1617

2105

signature="t",

1624

2112

return

1625

2113

if self.enabled:

1626

2114

# Reschedule checker run

1627

gobject.source_remove(self.checker_initiator_tag)

1628

self.checker_initiator_tag = gobject.timeout_add(

2115

GLib.source_remove(self.checker_initiator_tag)

2116

self.checker_initiator_tag = GLib.timeout_add(

1629

2117

value, self.start_checker)

1630

self.start_checker() # Start one now, too

1631

2118

self.start_checker() # Start one now, too

2119

1632

2120

# Checker - property

1633

2121

@dbus_service_property(_interface,

1634

2122

signature="s",

1637

2125

if value is None: # get

1638

2126

return dbus.String(self.checker_command)

1639

2127

self.checker_command = str(value)

1640

2128

1641

2129

# CheckerRunning - property

1642

2130

@dbus_service_property(_interface,

1643

2131

signature="b",

1649

2137

self.start_checker()

1650

2138

else:

1651

2139

self.stop_checker()

1652

2140

1653

2141

# ObjectPath - property

2142

@dbus_annotations(

2143

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

2144

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

1654

2145

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

1655

2146

def ObjectPath_dbus_property(self):

1656

return self.dbus_object_path # is already a dbus.ObjectPath

1657

2147

return self.dbus_object_path # is already a dbus.ObjectPath

2148

1658

2149

# Secret = property

2150

@dbus_annotations(

2151

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

2152

"invalidates"})

1659

2153

@dbus_service_property(_interface,

1660

2154

signature="ay",

1661

2155

access="write",

1662

2156

byte_arrays=True)

1663

2157

def Secret_dbus_property(self, value):

1664

2158

self.secret = bytes(value)

1665

2159

1666

2160

del _interface

1667

2161

1668

2162

1671

2165

self._pipe = child_pipe

1672

2166

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

1673

2167

if not self._pipe.recv():

1674

raise KeyError()

1675

2168

raise KeyError(fpr)

2169

1676

2170

def __getattribute__(self, name):

1677

2171

if name == '_pipe':

1678

2172

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

1681

2175

if data[0] == 'data':

1682

2176

return data[1]

1683

2177

if data[0] == 'function':

1684

2178

1685

2179

def func(*args, **kwargs):

1686

2180

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

1687

2181

return self._pipe.recv()[1]

1688

2182

1689

2183

return func

1690

2184

1691

2185

def __setattr__(self, name, value):

1692

2186

if name == '_pipe':

1693

2187

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

1696

2190

1697

2191

class ClientHandler(socketserver.BaseRequestHandler, object):

1698

2192

"""A class to handle client connections.

1699

2193

1700

2194

Instantiated once for each connection to handle it.

1701

2195

Note: This will run in its own forked process."""

1702

2196

1703

2197

def handle(self):

1704

2198

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

1705

2199

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

1706

2200

str(self.client_address))

1707

2201

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

1708

2202

self.server.child_pipe.fileno())

1709

1710

session = gnutls.connection.ClientSession(

1711

self.request, gnutls.connection .X509Credentials())

1712

1713

# Note: gnutls.connection.X509Credentials is really a

1714

# generic GnuTLS certificate credentials object so long as

1715

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

1716

# here despite using OpenPGP certificates.

1717

1718

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

1719

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

1720

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

1721

# "+DHE-DSS"))

2203

2204

session = gnutls.ClientSession(self.request)

2205

2206

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

2207

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

2208

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

2209

# "+DHE-DSS"))

1722

2210

# Use a fallback default, since this MUST be set.

1723

2211

priority = self.server.gnutls_priority

1724

2212

if priority is None:

1725

2213

priority = "NORMAL"

1726

gnutls.library.functions.gnutls_priority_set_direct(

1727

session._c_object, priority, None)

1728

2214

gnutls.priority_set_direct(session._c_object,

2215

priority.encode("utf-8"),

2216

None)

2217

1729

2218

# Start communication using the Mandos protocol

1730

2219

# Get protocol number

1731

2220

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

1736

2225

except (ValueError, IndexError, RuntimeError) as error:

1737

2226

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

1738

2227

return

1739

2228

1740

2229

# Start GnuTLS connection

1741

2230

try:

1742

2231

session.handshake()

1743

except gnutls.errors.GNUTLSError as error:

2232

except gnutls.Error as error:

1744

2233

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

1745

2234

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

1746

2235

# established. Just abandon the request.

1747

2236

return

1748

2237

logger.debug("Handshake succeeded")

1749

2238

1750

2239

approval_required = False

1751

2240

try:

1752

2241

try:

1753

2242

fpr = self.fingerprint(

1754

2243

self.peer_certificate(session))

1755

except (TypeError,

1756

gnutls.errors.GNUTLSError) as error:

2244

except (TypeError, gnutls.Error) as error:

1757

2245

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

1758

2246

return

1759

2247

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

1760

2248

1761

2249

try:

1762

2250

client = ProxyClient(child_pipe, fpr,

1763

2251

self.client_address)

1764

2252

except KeyError:

1765

2253

return

1766

2254

1767

2255

if client.approval_delay:

1768

2256

delay = client.approval_delay

1769

2257

client.approvals_pending += 1

1770

2258

approval_required = True

1771

2259

1772

2260

while True:

1773

2261

if not client.enabled:

1774

2262

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

1777

2265

# Emit D-Bus signal

1778

2266

client.Rejected("Disabled")

1779

2267

return

1780

2268

1781

2269

if client.approved or not client.approval_delay:

1782

#We are approved or approval is disabled

2270

# We are approved or approval is disabled

1783

2271

break

1784

2272

elif client.approved is None:

1785

2273

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

1796

2284

# Emit D-Bus signal

1797

2285

client.Rejected("Denied")

1798

2286

return

1799

1800

#wait until timeout or approved

2287

2288

# wait until timeout or approved

1801

2289

time = datetime.datetime.now()

1802

2290

client.changedstate.acquire()

1803

2291

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

1816

2304

break

1817

2305

else:

1818

2306

delay -= time2 - time

1819

1820

sent_size = 0

1821

while sent_size < len(client.secret):

1822

try:

1823

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

1824

except gnutls.errors.GNUTLSError as error:

1825

logger.warning("gnutls send failed",

1826

exc_info=error)

1827

return

1828

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

1829

len(client.secret) - (sent_size

1830

+ sent))

1831

sent_size += sent

1832

2307

2308

try:

2309

session.send(client.secret)

2310

except gnutls.Error as error:

2311

logger.warning("gnutls send failed",

2312

exc_info=error)

2313

return

2314

1833

2315

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

1834

2316

# bump the timeout using extended_timeout

1835

2317

client.bump_timeout(client.extended_timeout)

1836

2318

if self.server.use_dbus:

1837

2319

# Emit D-Bus signal

1838

2320

client.GotSecret()

1839

2321

1840

2322

finally:

1841

2323

if approval_required:

1842

2324

client.approvals_pending -= 1

1843

2325

try:

1844

2326

session.bye()

1845

except gnutls.errors.GNUTLSError as error:

2327

except gnutls.Error as error:

1846

2328

logger.warning("GnuTLS bye failed",

1847

2329

exc_info=error)

1848

2330

1849

2331

@staticmethod

1850

2332

def peer_certificate(session):

1851

2333

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

1852

2334

# If not an OpenPGP certificate...

1853

if (gnutls.library.functions.gnutls_certificate_type_get(

1854

session._c_object)

1855

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1856

# ...do the normal thing

1857

return session.peer_certificate

2335

if (gnutls.certificate_type_get(session._c_object)

2336

!= gnutls.CRT_OPENPGP):

2337

# ...return invalid data

2338

return b""

1858

2339

list_size = ctypes.c_uint(1)

1859

cert_list = (gnutls.library.functions

1860

.gnutls_certificate_get_peers

2340

cert_list = (gnutls.certificate_get_peers

1861

2341

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

1862

2342

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

1863

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

1864

" certificate")

2343

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

1865

2344

if list_size.value == 0:

1866

2345

return None

1867

2346

cert = cert_list[0]

1868

2347

return ctypes.string_at(cert.data, cert.size)

1869

2348

1870

2349

@staticmethod

1871

2350

def fingerprint(openpgp):

1872

2351

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1873

2352

# New GnuTLS "datum" with the OpenPGP public key

1874

datum = gnutls.library.types.gnutls_datum_t(

2353

datum = gnutls.datum_t(

1875

2354

ctypes.cast(ctypes.c_char_p(openpgp),

1876

2355

ctypes.POINTER(ctypes.c_ubyte)),

1877

2356

ctypes.c_uint(len(openpgp)))

1878

2357

# New empty GnuTLS certificate

1879

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1880

gnutls.library.functions.gnutls_openpgp_crt_init(

1881

ctypes.byref(crt))

2358

crt = gnutls.openpgp_crt_t()

2359

gnutls.openpgp_crt_init(ctypes.byref(crt))

1882

2360

# Import the OpenPGP public key into the certificate

1883

gnutls.library.functions.gnutls_openpgp_crt_import(

1884

crt, ctypes.byref(datum),

1885

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2361

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

2362

gnutls.OPENPGP_FMT_RAW)

1886

2363

# Verify the self signature in the key

1887

2364

crtverify = ctypes.c_uint()

1888

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1889

crt, 0, ctypes.byref(crtverify))

2365

gnutls.openpgp_crt_verify_self(crt, 0,

2366

ctypes.byref(crtverify))

1890

2367

if crtverify.value != 0:

1891

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1892

raise gnutls.errors.CertificateSecurityError(

1893

"Verify failed")

2368

gnutls.openpgp_crt_deinit(crt)

2369

raise gnutls.CertificateSecurityError("Verify failed")

1894

2370

# New buffer for the fingerprint

1895

2371

buf = ctypes.create_string_buffer(20)

1896

2372

buf_len = ctypes.c_size_t()

1897

2373

# Get the fingerprint from the certificate into the buffer

1898

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1899

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

2374

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

2375

ctypes.byref(buf_len))

1900

2376

# Deinit the certificate

1901

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2377

gnutls.openpgp_crt_deinit(crt)

1902

2378

# Convert the buffer to a Python bytestring

1903

2379

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

1904

2380

# Convert the bytestring to hexadecimal notation

1908

2384

1909

2385

class MultiprocessingMixIn(object):

1910

2386

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

1911

2387

1912

2388

def sub_process_main(self, request, address):

1913

2389

try:

1914

2390

self.finish_request(request, address)

1915

2391

except Exception:

1916

2392

self.handle_error(request, address)

1917

2393

self.close_request(request)

1918

2394

1919

2395

def process_request(self, request, address):

1920

2396

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

1921

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

1922

args = (request, address))

2397

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

2398

args=(request, address))

1923

2399

proc.start()

1924

2400

return proc

1925

2401

1926

2402

1927

2403

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1928

2404

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

1929

2405

1930

2406

def process_request(self, request, client_address):

1931

2407

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

1932

2408

1933

2409

This function creates a new pipe in self.pipe

1934

2410

"""

1935

2411

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1936

2412

1937

2413

proc = MultiprocessingMixIn.process_request(self, request,

1938

2414

client_address)

1939

2415

self.child_pipe.close()

1940

2416

self.add_pipe(parent_pipe, proc)

1941

2417

1942

2418

def add_pipe(self, parent_pipe, proc):

1943

2419

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

1944

2420

raise NotImplementedError()

1947

2423

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1948

2424

socketserver.TCPServer, object):

1949

2425

"""IPv6-capable TCP server. Accepts 'None' as address and/or port

1950

2426

1951

2427

Attributes:

1952

2428

enabled: Boolean; whether this server is activated yet

1953

2429

interface: None or a network interface name (string)

1954

2430

use_ipv6: Boolean; to use IPv6 or not

1955

2431

"""

1956

2432

1957

2433

def __init__(self, server_address, RequestHandlerClass,

1958

2434

interface=None,

1959

2435

use_ipv6=True,

1969

2445

self.socketfd = socketfd

1970

2446

# Save the original socket.socket() function

1971

2447

self.socket_socket = socket.socket

2448

1972

2449

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

1973

#

2450

#

1974

2451

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

1975

2452

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

1976

2453

# patching socket.socket.)

1977

#

2454

#

1978

2455

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

1979

2456

@functools.wraps(socket.socket)

1980

2457

def socket_wrapper(*args, **kwargs):

1992

2469

# socket_wrapper(), if socketfd was set.

1993

2470

socketserver.TCPServer.__init__(self, server_address,

1994

2471

RequestHandlerClass)

1995

2472

1996

2473

def server_bind(self):

1997

2474

"""This overrides the normal server_bind() function

1998

2475

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

1999

2476

bind to an address or port if they were not specified."""

2477

global SO_BINDTODEVICE

2000

2478

if self.interface is not None:

2001

2479

if SO_BINDTODEVICE is None:

2002

logger.error("SO_BINDTODEVICE does not exist;"

2003

" cannot bind to interface %s",

2004

self.interface)

2005

else:

2006

try:

2007

self.socket.setsockopt(

2008

socket.SOL_SOCKET, SO_BINDTODEVICE,

2009

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

2010

except socket.error as error:

2011

if error.errno == errno.EPERM:

2012

logger.error("No permission to bind to"

2013

" interface %s", self.interface)

2014

elif error.errno == errno.ENOPROTOOPT:

2015

logger.error("SO_BINDTODEVICE not available;"

2016

" cannot bind to interface %s",

2017

self.interface)

2018

elif error.errno == errno.ENODEV:

2019

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

2020

" cannot bind", self.interface)

2021

else:

2022

raise

2480

# Fall back to a hard-coded value which seems to be

2481

# common enough.

2482

logger.warning("SO_BINDTODEVICE not found, trying 25")

2483

SO_BINDTODEVICE = 25

2484

try:

2485

self.socket.setsockopt(

2486

socket.SOL_SOCKET, SO_BINDTODEVICE,

2487

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

2488

except socket.error as error:

2489

if error.errno == errno.EPERM:

2490

logger.error("No permission to bind to"

2491

" interface %s", self.interface)

2492

elif error.errno == errno.ENOPROTOOPT:

2493

logger.error("SO_BINDTODEVICE not available;"

2494

" cannot bind to interface %s",

2495

self.interface)

2496

elif error.errno == errno.ENODEV:

2497

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

2498

" cannot bind", self.interface)

2499

else:

2500

raise

2023

2501

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

2024

2502

if self.server_address[0] or self.server_address[1]:

2025

2503

if not self.server_address[0]:

2026

2504

if self.address_family == socket.AF_INET6:

2027

any_address = "::" # in6addr_any

2505

any_address = "::" # in6addr_any

2028

2506

else:

2029

any_address = "0.0.0.0" # INADDR_ANY

2507

any_address = "0.0.0.0" # INADDR_ANY

2030

2508

self.server_address = (any_address,

2031

2509

self.server_address[1])

2032

2510

elif not self.server_address[1]:

2042

2520

2043

2521

class MandosServer(IPv6_TCPServer):

2044

2522

"""Mandos server.

2045

2523

2046

2524

Attributes:

2047

2525

clients: set of Client objects

2048

2526

gnutls_priority GnuTLS priority string

2049

2527

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

2050

2051

Assumes a gobject.MainLoop event loop.

2528

2529

Assumes a GLib.MainLoop event loop.

2052

2530

"""

2053

2531

2054

2532

def __init__(self, server_address, RequestHandlerClass,

2055

2533

interface=None,

2056

2534

use_ipv6=True,

2066

2544

self.gnutls_priority = gnutls_priority

2067

2545

IPv6_TCPServer.__init__(self, server_address,

2068

2546

RequestHandlerClass,

2069

interface = interface,

2070

use_ipv6 = use_ipv6,

2071

socketfd = socketfd)

2072

2547

interface=interface,

2548

use_ipv6=use_ipv6,

2549

socketfd=socketfd)

2550

2073

2551

def server_activate(self):

2074

2552

if self.enabled:

2075

2553

return socketserver.TCPServer.server_activate(self)

2076

2554

2077

2555

def enable(self):

2078

2556

self.enabled = True

2079

2557

2080

2558

def add_pipe(self, parent_pipe, proc):

2081

2559

# Call "handle_ipc" for both data and EOF events

2082

gobject.io_add_watch(

2560

GLib.io_add_watch(

2083

2561

parent_pipe.fileno(),

2084

gobject.IO_IN | gobject.IO_HUP,

2562

GLib.IO_IN | GLib.IO_HUP,

2085

2563

functools.partial(self.handle_ipc,

2086

parent_pipe = parent_pipe,

2087

proc = proc))

2088

2564

parent_pipe=parent_pipe,

2565

proc=proc))

2566

2089

2567

def handle_ipc(self, source, condition,

2090

2568

parent_pipe=None,

2091

proc = None,

2569

proc=None,

2092

2570

client_object=None):

2093

2571

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

2094

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

2572

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

2095

2573

# Wait for other process to exit

2096

2574

proc.join()

2097

2575

return False

2098

2576

2099

2577

# Read a request from the child

2100

2578

request = parent_pipe.recv()

2101

2579

command = request[0]

2102

2580

2103

2581

if command == 'init':

2104

fpr = request[1]

2582

fpr = request[1].decode("ascii")

2105

2583

address = request[2]

2106

2107

for c in self.clients.itervalues():

2584

2585

for c in self.clients.values():

2108

2586

if c.fingerprint == fpr:

2109

2587

client = c

2110

2588

break

2117

2595

address[0])

2118

2596

parent_pipe.send(False)

2119

2597

return False

2120

2121

gobject.io_add_watch(

2598

2599

GLib.io_add_watch(

2122

2600

parent_pipe.fileno(),

2123

gobject.IO_IN | gobject.IO_HUP,

2601

GLib.IO_IN | GLib.IO_HUP,

2124

2602

functools.partial(self.handle_ipc,

2125

parent_pipe = parent_pipe,

2126

proc = proc,

2127

client_object = client))

2603

parent_pipe=parent_pipe,

2604

proc=proc,

2605

client_object=client))

2128

2606

parent_pipe.send(True)

2129

2607

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

2130

2608

# same fileno

2133

2611

funcname = request[1]

2134

2612

args = request[2]

2135

2613

kwargs = request[3]

2136

2614

2137

2615

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

2138

2616

funcname)(*args,

2139

2617

**kwargs)))

2140

2618

2141

2619

if command == 'getattr':

2142

2620

attrname = request[1]

2143

if callable(client_object.__getattribute__(attrname)):

2621

if isinstance(client_object.__getattribute__(attrname),

2622

collections.Callable):

2144

2623

parent_pipe.send(('function', ))

2145

2624

else:

2146

2625

parent_pipe.send((

2147

2626

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

2148

2627

2149

2628

if command == 'setattr':

2150

2629

attrname = request[1]

2151

2630

value = request[2]

2152

2631

setattr(client_object, attrname, value)

2153

2632

2154

2633

return True

2155

2634

2156

2635

2157

2636

def rfc3339_duration_to_delta(duration):

2158

2637

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

2159

2638

2160

2639

>>> rfc3339_duration_to_delta("P7D")

2161

2640

datetime.timedelta(7)

2162

2641

>>> rfc3339_duration_to_delta("PT60S")

2172

2651

>>> rfc3339_duration_to_delta("P1DT3M20S")

2173

2652

datetime.timedelta(1, 200)

2174

2653

"""

2175

2654

2176

2655

# Parsing an RFC 3339 duration with regular expressions is not

2177

2656

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

2178

2657

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

2179

2658

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

2180

2659

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

2181

2660

# avoid excessive use of external libraries.

2182

2661

2183

2662

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

2184

Token = collections.namedtuple("Token",

2185

("regexp", # To match token; if

2186

# "value" is not None,

2187

# must have a "group"

2188

# containing digits

2189

"value", # datetime.timedelta or

2190

# None

2191

"followers")) # Tokens valid after

2192

# this token

2193

2663

Token = collections.namedtuple("Token", (

2194

2664

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

2195

2665

# a "group" containing digits

2227

2697

frozenset((token_year, token_month,

2228

2698

token_day, token_time,

2229

2699

token_week)))

2230

# Define starting values

2231

value = datetime.timedelta() # Value so far

2700

# Define starting values:

2701

# Value so far

2702

value = datetime.timedelta()

2232

2703

found_token = None

2233

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

2234

s = duration # String left to parse

2704

# Following valid tokens

2705

followers = frozenset((token_duration, ))

2706

# String left to parse

2707

s = duration

2235

2708

# Loop until end token is found

2236

2709

while found_token is not token_end:

2237

2710

# Search for any currently valid tokens

2253

2726

break

2254

2727

else:

2255

2728

# No currently valid tokens were found

2256

raise ValueError("Invalid RFC 3339 duration")

2729

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

2730

.format(duration))

2257

2731

# End token found

2258

2732

return value

2259

2733

2260

2734

2261

2735

def string_to_delta(interval):

2262

2736

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

2263

2737

2264

2738

>>> string_to_delta('7d')

2265

2739

datetime.timedelta(7)

2266

2740

>>> string_to_delta('60s')

2274

2748

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

2275

2749

datetime.timedelta(0, 330)

2276

2750

"""

2277

2751

2278

2752

try:

2279

2753

return rfc3339_duration_to_delta(interval)

2280

2754

except ValueError:

2281

2755

pass

2282

2756

2283

2757

timevalue = datetime.timedelta(0)

2284

2758

for s in interval.split():

2285

2759

try:

2303

2777

return timevalue

2304

2778

2305

2779

2306

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

2780

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

2307

2781

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

2308

2782

2309

2783

This should really exist as os.daemon, but it doesn't (yet)."""

2310

2784

if os.fork():

2311

2785

sys.exit()

2329

2803

2330

2804

2331

2805

def main():

2332

2806

2333

2807

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

2334

2808

# Parsing of options, both command line and config file

2335

2809

2336

2810

parser = argparse.ArgumentParser()

2337

2811

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

2338

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

2812

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

2339

2813

help="show version number and exit")

2340

2814

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

2341

2815

help="Bind to interface IF")

2377

2851

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

2378

2852

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

2379

2853

default=None)

2380

2854

2381

2855

options = parser.parse_args()

2382

2856

2383

2857

if options.check:

2384

2858

import doctest

2385

2859

fail_count, test_count = doctest.testmod()

2386

2860

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

2387

2861

2388

2862

# Default values for config file for server-global settings

2389

server_defaults = { "interface": "",

2390

"address": "",

2391

"port": "",

2392

"debug": "False",

2393

"priority":

2394

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

2395

":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2396

"servicename": "Mandos",

2397

"use_dbus": "True",

2398

"use_ipv6": "True",

2399

"debuglevel": "",

2400

"restore": "True",

2401

"socket": "",

2402

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

2403

"foreground": "False",

2404

"zeroconf": "True",

2405

}

2406

2863

server_defaults = {"interface": "",

2864

"address": "",

2865

"port": "",

2866

"debug": "False",

2867

"priority":

2868

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

2869

":+SIGN-DSA-SHA256",

2870

"servicename": "Mandos",

2871

"use_dbus": "True",

2872

"use_ipv6": "True",

2873

"debuglevel": "",

2874

"restore": "True",

2875

"socket": "",

2876

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

2877

"foreground": "False",

2878

"zeroconf": "True",

2879

}

2880

2407

2881

# Parse config file for server-global settings

2408

2882

server_config = configparser.SafeConfigParser(server_defaults)

2409

2883

del server_defaults

2411

2885

# Convert the SafeConfigParser object to a dict

2412

2886

server_settings = server_config.defaults()

2413

2887

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

2414

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

2888

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

2889

"foreground", "zeroconf"):

2415

2890

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

2416

2891

option)

2417

2892

if server_settings["port"]:

2427

2902

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

2428

2903

["socket"])

2429

2904

del server_config

2430

2905

2431

2906

# Override the settings from the config file with command line

2432

2907

# options, if set.

2433

2908

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

2451

2926

if server_settings["debug"]:

2452

2927

server_settings["foreground"] = True

2453

2928

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

2454

2929

2455

2930

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

2456

2931

2457

2932

if (not server_settings["zeroconf"]

2458

2933

and not (server_settings["port"]

2459

2934

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

2460

2935

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

2461

2936

2462

2937

# For convenience

2463

2938

debug = server_settings["debug"]

2464

2939

debuglevel = server_settings["debuglevel"]

2468

2943

stored_state_file)

2469

2944

foreground = server_settings["foreground"]

2470

2945

zeroconf = server_settings["zeroconf"]

2471

2946

2472

2947

if debug:

2473

2948

initlogger(debug, logging.DEBUG)

2474

2949

else:

2477

2952

else:

2478

2953

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

2479

2954

initlogger(debug, level)

2480

2955

2481

2956

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

2482

2957

syslogger.setFormatter(

2483

2958

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

2484

2959

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

2485

2960

server_settings["servicename"])))

2486

2961

2487

2962

# Parse config file with clients

2488

2963

client_config = configparser.SafeConfigParser(Client

2489

2964

.client_defaults)

2490

2965

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

2491

2966

"clients.conf"))

2492

2967

2493

2968

global mandos_dbus_service

2494

2969

mandos_dbus_service = None

2495

2970

2496

2971

socketfd = None

2497

2972

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

2498

2973

socketfd = server_settings["socket"]

2510

2985

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

2511

2986

pidfile = None

2512

2987

try:

2513

pidfile = open(pidfilename, "w")

2988

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

2514

2989

except IOError as e:

2515

2990

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

2516

2991

exc_info=e)

2517

2518

for name in ("_mandos", "mandos", "nobody"):

2992

2993

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

2994

("mandos", "mandos"),

2995

("nobody", "nogroup")):

2519

2996

try:

2520

2997

uid = pwd.getpwnam(name).pw_uid

2521

gid = pwd.getpwnam(name).pw_gid

2998

gid = pwd.getpwnam(group).pw_gid

2522

2999

break

2523

3000

except KeyError:

2524

3001

continue

2528

3005

try:

2529

3006

os.setgid(gid)

2530

3007

os.setuid(uid)

3008

if debug:

3009

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

3010

gid))

2531

3011

except OSError as error:

3012

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

3013

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

2532

3014

if error.errno != errno.EPERM:

2533

3015

raise

2534

3016

2535

3017

if debug:

2536

3018

# Enable all possible GnuTLS debugging

2537

3019

2538

3020

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

2539

3021

# - GnuTLS manual

2540

gnutls.library.functions.gnutls_global_set_log_level(11)

2541

2542

@gnutls.library.types.gnutls_log_func

3022

gnutls.global_set_log_level(11)

3023

3024

@gnutls.log_func

2543

3025

def debug_gnutls(level, string):

2544

3026

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

2545

2546

gnutls.library.functions.gnutls_global_set_log_function(

2547

debug_gnutls)

2548

3027

3028

gnutls.global_set_log_function(debug_gnutls)

3029

2549

3030

# Redirect stdin so all checkers get /dev/null

2550

3031

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

2551

3032

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

2552

3033

if null > 2:

2553

3034

os.close(null)

2554

3035

2555

3036

# Need to fork before connecting to D-Bus

2556

3037

if not foreground:

2557

3038

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

2558

3039

daemon()

2559

2560

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

2561

# need to inform gobject that threads will be used.

2562

gobject.threads_init()

2563

3040

3041

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

3042

# to inform GLib that threads will be used.

3043

GLib.threads_init()

3044

2564

3045

global main_loop

2565

3046

# From the Avahi example code

2566

3047

DBusGMainLoop(set_as_default=True)

2567

main_loop = gobject.MainLoop()

3048

main_loop = GLib.MainLoop()

2568

3049

bus = dbus.SystemBus()

2569

3050

# End of Avahi example code

2570

3051

if use_dbus:

2575

3056

old_bus_name = dbus.service.BusName(

2576

3057

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

2577

3058

do_not_queue=True)

2578

except dbus.exceptions.NameExistsException as e:

3059

except dbus.exceptions.DBusException as e:

2579

3060

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

2580

3061

use_dbus = False

2581

3062

server_settings["use_dbus"] = False

2583

3064

if zeroconf:

2584

3065

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2585

3066

service = AvahiServiceToSyslog(

2586

name = server_settings["servicename"],

2587

servicetype = "_mandos._tcp",

2588

protocol = protocol,

2589

bus = bus)

3067

name=server_settings["servicename"],

3068

servicetype="_mandos._tcp",

3069

protocol=protocol,

3070

bus=bus)

2590

3071

if server_settings["interface"]:

2591

3072

service.interface = if_nametoindex(

2592

3073

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

2593

3074

2594

3075

global multiprocessing_manager

2595

3076

multiprocessing_manager = multiprocessing.Manager()

2596

3077

2597

3078

client_class = Client

2598

3079

if use_dbus:

2599

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

2600

3080

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

3081

2601

3082

client_settings = Client.config_parser(client_config)

2602

3083

old_client_settings = {}

2603

3084

clients_data = {}

2604

3085

2605

3086

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

2606

3087

global wnull

2607

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

3088

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

2608

3089

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

2609

3090

# mode

2610

3091

if debug or not foreground:

2611

3092

wnull.close()

2612

3093

2613

3094

# Get client data and settings from last running state.

2614

3095

if server_settings["restore"]:

2615

3096

try:

2616

3097

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

2617

clients_data, old_client_settings = pickle.load(

2618

stored_state)

3098

if sys.version_info.major == 2:

3099

clients_data, old_client_settings = pickle.load(

3100

stored_state)

3101

else:

3102

bytes_clients_data, bytes_old_client_settings = (

3103

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

3104

# Fix bytes to strings

3105

# clients_data

3106

# .keys()

3107

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

3108

if isinstance(key, bytes)

3109

else key): value

3110

for key, value in

3111

bytes_clients_data.items()}

3112

del bytes_clients_data

3113

for key in clients_data:

3114

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

3115

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

3116

for k, v in

3117

clients_data[key].items()}

3118

clients_data[key] = value

3119

# .client_structure

3120

value["client_structure"] = [

3121

(s.decode("utf-8")

3122

if isinstance(s, bytes)

3123

else s) for s in

3124

value["client_structure"]]

3125

# .name & .host

3126

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

3127

if isinstance(value[k], bytes):

3128

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

3129

# old_client_settings

3130

# .keys()

3131

old_client_settings = {

3132

(key.decode("utf-8")

3133

if isinstance(key, bytes)

3134

else key): value

3135

for key, value in

3136

bytes_old_client_settings.items()}

3137

del bytes_old_client_settings

3138

# .host

3139

for value in old_client_settings.values():

3140

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

3141

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

3142

.decode("utf-8"))

2619

3143

os.remove(stored_state_path)

2620

3144

except IOError as e:

2621

3145

if e.errno == errno.ENOENT:

2629

3153

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

2630

3154

"EOFError:",

2631

3155

exc_info=e)

2632

3156

2633

3157

with PGPEngine() as pgp:

2634

3158

for client_name, client in clients_data.items():

2635

3159

# Skip removed clients

2636

3160

if client_name not in client_settings:

2637

3161

continue

2638

3162

2639

3163

# Decide which value to use after restoring saved state.

2640

3164

# We have three different values: Old config file,

2641

3165

# new config file, and saved state.

2652

3176

client[name] = value

2653

3177

except KeyError:

2654

3178

pass

2655

3179

2656

3180

# Clients who has passed its expire date can still be

2657

# enabled if its last checker was successful. Clients

3181

# enabled if its last checker was successful. A Client

2658

3182

# whose checker succeeded before we stored its state is

2659

3183

# assumed to have successfully run all checkers during

2660

3184

# downtime.

2691

3215

client_name))

2692

3216

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

2693

3217

["secret"])

2694

3218

2695

3219

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

2696

3220

for client_name in (set(old_client_settings)

2697

3221

- set(client_settings)):

2699

3223

for client_name in (set(client_settings)

2700

3224

- set(old_client_settings)):

2701

3225

clients_data[client_name] = client_settings[client_name]

2702

3226

2703

3227

# Create all client objects

2704

3228

for client_name, client in clients_data.items():

2705

3229

tcp_server.clients[client_name] = client_class(

2706

name = client_name,

2707

settings = client,

2708

server_settings = server_settings)

2709

3230

name=client_name,

3231

settings=client,

3232

server_settings=server_settings)

3233

2710

3234

if not tcp_server.clients:

2711

3235

logger.warning("No clients defined")

2712

3236

2713

3237

if not foreground:

2714

3238

if pidfile is not None:

3239

pid = os.getpid()

2715

3240

try:

2716

3241

with pidfile:

2717

pid = os.getpid()

2718

pidfile.write("{}\n".format(pid).encode("utf-8"))

3242

print(pid, file=pidfile)

2719

3243

except IOError:

2720

3244

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

2721

3245

pidfilename, pid)

2722

3246

del pidfile

2723

3247

del pidfilename

2724

2725

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

2726

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

2727

3248

3249

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

3250

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3251

lambda: main_loop.quit() and False)

3252

2728

3253

if use_dbus:

2729

3254

2730

3255

@alternate_dbus_interfaces(

2731

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

2732

class MandosDBusService(DBusObjectWithProperties):

3256

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

3257

class MandosDBusService(DBusObjectWithObjectManager):

2733

3258

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

2734

3259

2735

3260

def __init__(self):

2736

3261

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

2737

3262

2738

3263

_interface = "se.recompile.Mandos"

2739

2740

@dbus_interface_annotations(_interface)

2741

def _foo(self):

2742

return {

2743

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

2744

"false" }

2745

3264

2746

3265

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

2747

3266

def ClientAdded(self, objpath):

2748

3267

"D-Bus signal"

2749

3268

pass

2750

3269

2751

3270

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

2752

3271

def ClientNotFound(self, fingerprint, address):

2753

3272

"D-Bus signal"

2754

3273

pass

2755

3274

3275

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

3276

"true"})

2756

3277

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

2757

3278

def ClientRemoved(self, objpath, name):

2758

3279

"D-Bus signal"

2759

3280

pass

2760

3281

3282

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

3283

"true"})

2761

3284

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

2762

3285

def GetAllClients(self):

2763

3286

"D-Bus method"

2764

3287

return dbus.Array(c.dbus_object_path for c in

2765

tcp_server.clients.itervalues())

2766

3288

tcp_server.clients.values())

3289

3290

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

3291

"true"})

2767

3292

@dbus.service.method(_interface,

2768

3293

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

2769

3294

def GetAllClientsWithProperties(self):

2770

3295

"D-Bus method"

2771

3296

return dbus.Dictionary(

2772

{ c.dbus_object_path: c.GetAll("")

2773

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

3297

{c.dbus_object_path: c.GetAll(

3298

"se.recompile.Mandos.Client")

3299

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

2774

3300

signature="oa{sv}")

2775

3301

2776

3302

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

2777

3303

def RemoveClient(self, object_path):

2778

3304

"D-Bus method"

2779

for c in tcp_server.clients.itervalues():

3305

for c in tcp_server.clients.values():

2780

3306

if c.dbus_object_path == object_path:

2781

3307

del tcp_server.clients[c.name]

2782

3308

c.remove_from_connection()

2783

# Don't signal anything except ClientRemoved

3309

# Don't signal the disabling

2784

3310

c.disable(quiet=True)

2785

# Emit D-Bus signal

2786

self.ClientRemoved(object_path, c.name)

3311

# Emit D-Bus signal for removal

3312

self.client_removed_signal(c)

2787

3313

return

2788

3314

raise KeyError(object_path)

2789

3315

2790

3316

del _interface

2791

3317

3318

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3319

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

3320

def GetManagedObjects(self):

3321

"""D-Bus method"""

3322

return dbus.Dictionary(

3323

{client.dbus_object_path:

3324

dbus.Dictionary(

3325

{interface: client.GetAll(interface)

3326

for interface in

3327

client._get_all_interface_names()})

3328

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

3329

3330

def client_added_signal(self, client):

3331

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

3332

if use_dbus:

3333

# New standard signal

3334

self.InterfacesAdded(

3335

client.dbus_object_path,

3336

dbus.Dictionary(

3337

{interface: client.GetAll(interface)

3338

for interface in

3339

client._get_all_interface_names()}))

3340

# Old signal

3341

self.ClientAdded(client.dbus_object_path)

3342

3343

def client_removed_signal(self, client):

3344

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

3345

if use_dbus:

3346

# New standard signal

3347

self.InterfacesRemoved(

3348

client.dbus_object_path,

3349

client._get_all_interface_names())

3350

# Old signal

3351

self.ClientRemoved(client.dbus_object_path,

3352

client.name)

3353

2792

3354

mandos_dbus_service = MandosDBusService()

2793

3355

3356

# Save modules to variables to exempt the modules from being

3357

# unloaded before the function registered with atexit() is run.

3358

mp = multiprocessing

3359

wn = wnull

3360

2794

3361

def cleanup():

2795

3362

"Cleanup function; run on exit"

2796

3363

if zeroconf:

2797

3364

service.cleanup()

2798

2799

multiprocessing.active_children()

2800

wnull.close()

3365

3366

mp.active_children()

3367

wn.close()

2801

3368

if not (tcp_server.clients or client_settings):

2802

3369

return

2803

3370

2804

3371

# Store client before exiting. Secrets are encrypted with key

2805

3372

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

2806

3373

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

2807

3374

clients = {}

2808

3375

with PGPEngine() as pgp:

2809

for client in tcp_server.clients.itervalues():

3376

for client in tcp_server.clients.values():

2810

3377

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

2811

3378

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

2812

3379

key)

2813

3380

client_dict = {}

2814

3381

2815

3382

# A list of attributes that can not be pickled

2816

3383

# + secret.

2817

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

2818

"checker", "server_settings" }

3384

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

3385

"checker", "server_settings"}

2819

3386

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

2820

3387

.Object):

2821

3388

exclude.add(name)

2822

3389

2823

3390

client_dict["encrypted_secret"] = (client

2824

3391

.encrypted_secret)

2825

3392

for attr in client.client_structure:

2826

3393

if attr not in exclude:

2827

3394

client_dict[attr] = getattr(client, attr)

2828

3395

2829

3396

clients[client.name] = client_dict

2830

3397

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

2831

3398

2832

3399

try:

2833

3400

with tempfile.NamedTemporaryFile(

2834

3401

mode='wb',

2836

3403

prefix='clients-',

2837

3404

dir=os.path.dirname(stored_state_path),

2838

3405

delete=False) as stored_state:

2839

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

3406

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

3407

protocol=2)

2840

3408

tempname = stored_state.name

2841

3409

os.rename(tempname, stored_state_path)

2842

3410

except (IOError, OSError) as e:

2852

3420

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

2853

3421

exc_info=e)

2854

3422

raise

2855

3423

2856

3424

# Delete all clients, and settings from config

2857

3425

while tcp_server.clients:

2858

3426

name, client = tcp_server.clients.popitem()

2859

3427

if use_dbus:

2860

3428

client.remove_from_connection()

2861

# Don't signal anything except ClientRemoved

3429

# Don't signal the disabling

2862

3430

client.disable(quiet=True)

3431

# Emit D-Bus signal for removal

2863

3432

if use_dbus:

2864

# Emit D-Bus signal

2865

mandos_dbus_service.ClientRemoved(

2866

client.dbus_object_path, client.name)

3433

mandos_dbus_service.client_removed_signal(client)

2867

3434

client_settings.clear()

2868

3435

2869

3436

atexit.register(cleanup)

2870

2871

for client in tcp_server.clients.itervalues():

3437

3438

for client in tcp_server.clients.values():

2872

3439

if use_dbus:

2873

# Emit D-Bus signal

2874

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3440

# Emit D-Bus signal for adding

3441

mandos_dbus_service.client_added_signal(client)

2875

3442

# Need to initiate checking of clients

2876

3443

if client.enabled:

2877

3444

client.init_checker()

2878

3445

2879

3446

tcp_server.enable()

2880

3447

tcp_server.server_activate()

2881

3448

2882

3449

# Find out what port we got

2883

3450

if zeroconf:

2884

3451

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

2889

3456

else: # IPv4

2890

3457

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

2891

3458

*tcp_server.socket.getsockname())

2892

2893

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

2894

3459

3460

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

3461

2895

3462

try:

2896

3463

if zeroconf:

2897

3464

# From the Avahi example code

2902

3469

cleanup()

2903

3470

sys.exit(1)

2904

3471

# End of Avahi example code

2905

2906

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

2907

lambda *args, **kwargs:

2908

(tcp_server.handle_request

2909

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

2910

3472

3473

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

3474

lambda *args, **kwargs:

3475

(tcp_server.handle_request

3476

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

3477

2911

3478

logger.debug("Starting main loop")

2912

3479

main_loop.run()

2913

3480

except AvahiError as error: