/mandos/release : revision 237.7.502

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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 = "1.7.19"

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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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247

'--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,

251

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:

214

255

raise PGPError(err)

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return ciphertext

216

257

217

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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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265

'--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,

269

stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

231

272

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

278

class Avahi(object):

279

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

280

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

281

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

282

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

283

PROTO_INET = 0 # avahi-common/address.h

284

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"

287

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):

291

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

292

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

293

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

294

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

296

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

300

SERVER_FAILURE = 4 # avahi-common/defs.h

301

avahi = Avahi()

302

303

236

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class AvahiError(Exception):

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

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self.value = value

250

318

251

319

class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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321

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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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336

server: D-Bus Server

269

337

bus: dbus.SystemBus()

270

338

"""

271

339

272

340

def __init__(self,

273

interface = avahi.IF_UNSPEC,

274

name = None,

275

servicetype = None,

276

port = None,

277

TXT = None,

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domain = "",

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host = "",

280

max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

282

bus = None):

341

interface=avahi.IF_UNSPEC,

342

name=None,

343

servicetype=None,

344

port=None,

345

TXT=None,

346

domain="",

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host="",

348

max_renames=32768,

349

protocol=avahi.PROTO_UNSPEC,

350

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

297

365

298

366

def rename(self, remove=True):

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

300

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if self.rename_count >= self.max_renames:

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388

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"""

326

394

if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

329

397

if self.group is not None:

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398

self.group.Reset()

331

399

332

400

def add(self):

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401

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

334

402

self.remove()

351

419

dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

353

421

self.group.Commit()

354

422

355

423

def entry_group_state_changed(self, state, error):

356

424

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

357

425

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

358

426

359

427

if state == avahi.ENTRY_GROUP_ESTABLISHED:

360

428

logger.debug("Zeroconf service established.")

361

429

elif state == avahi.ENTRY_GROUP_COLLISION:

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433

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

366

434

str(error))

367

435

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

368

436

369

437

def cleanup(self):

370

438

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

371

439

if self.group is not None:

376

444

pass

377

445

self.group = None

378

446

self.remove()

379

447

380

448

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

381

449

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

382

450

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

394

462

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

395

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

478

if error is None:

400

479

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

401

480

else:

402

481

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

403

482

404

483

def activate(self):

405

484

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

406

485

if self.server is None:

417

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(*args, **kwargs)

421

500

syslogger.setFormatter(logging.Formatter(

422

501

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

423

502

.format(self.name)))

424

503

return ret

425

504

426

505

506

# Pretend that we have a GnuTLS module

507

class GnuTLS(object):

508

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

509

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

510

511

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

512

if library is None:

513

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

514

_library = ctypes.cdll.LoadLibrary(library)

515

del library

516

_need_version = b"3.3.0"

517

518

def __init__(self):

519

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

520

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

521

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

522

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

523

.format(self._need_version))

524

525

# Unless otherwise indicated, the constants and types below are

526

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

527

528

# Constants

529

E_SUCCESS = 0

530

E_INTERRUPTED = -52

531

E_AGAIN = -28

532

CRT_OPENPGP = 2

533

CLIENT = 2

534

SHUT_RDWR = 0

535

CRD_CERTIFICATE = 1

536

E_NO_CERTIFICATE_FOUND = -49

537

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

538

539

# Types

540

class session_int(ctypes.Structure):

541

_fields_ = []

542

session_t = ctypes.POINTER(session_int)

543

544

class certificate_credentials_st(ctypes.Structure):

545

_fields_ = []

546

certificate_credentials_t = ctypes.POINTER(

547

certificate_credentials_st)

548

certificate_type_t = ctypes.c_int

549

550

class datum_t(ctypes.Structure):

551

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

552

('size', ctypes.c_uint)]

553

554

class openpgp_crt_int(ctypes.Structure):

555

_fields_ = []

556

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

557

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

558

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

559

credentials_type_t = ctypes.c_int

560

transport_ptr_t = ctypes.c_void_p

561

close_request_t = ctypes.c_int

562

563

# Exceptions

564

class Error(Exception):

565

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

566

# exception might be raised from within GnuTLS.__init__,

567

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

568

# global variable has happened.

569

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

570

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

571

# code is passed, convert it to a string with

572

# gnutls.strerror()

573

self.code = code

574

if message is None and code is not None:

575

message = GnuTLS.strerror(code)

576

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

577

message, *args)

578

579

class CertificateSecurityError(Error):

580

pass

581

582

# Classes

583

class Credentials(object):

584

def __init__(self):

585

self._c_object = gnutls.certificate_credentials_t()

586

gnutls.certificate_allocate_credentials(

587

ctypes.byref(self._c_object))

588

self.type = gnutls.CRD_CERTIFICATE

589

590

def __del__(self):

591

gnutls.certificate_free_credentials(self._c_object)

592

593

class ClientSession(object):

594

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

595

self._c_object = gnutls.session_t()

596

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

597

gnutls.set_default_priority(self._c_object)

598

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

599

gnutls.handshake_set_private_extensions(self._c_object,

600

True)

601

self.socket = socket

602

if credentials is None:

603

credentials = gnutls.Credentials()

604

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

605

ctypes.cast(credentials._c_object,

606

ctypes.c_void_p))

607

self.credentials = credentials

608

609

def __del__(self):

610

gnutls.deinit(self._c_object)

611

612

def handshake(self):

613

return gnutls.handshake(self._c_object)

614

615

def send(self, data):

616

data = bytes(data)

617

data_len = len(data)

618

while data_len > 0:

619

data_len -= gnutls.record_send(self._c_object,

620

data[-data_len:],

621

data_len)

622

623

def bye(self):

624

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

625

626

# Error handling functions

627

def _error_code(result):

628

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

629

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

630

if result >= 0:

631

return result

632

if result == gnutls.E_NO_CERTIFICATE_FOUND:

633

raise gnutls.CertificateSecurityError(code=result)

634

raise gnutls.Error(code=result)

635

636

def _retry_on_error(result, func, arguments):

637

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

638

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

639

while result < 0:

640

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

641

return _error_code(result)

642

result = func(*arguments)

643

return result

644

645

# Unless otherwise indicated, the function declarations below are

646

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

647

648

# Functions

649

priority_set_direct = _library.gnutls_priority_set_direct

650

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

651

ctypes.POINTER(ctypes.c_char_p)]

652

priority_set_direct.restype = _error_code

653

654

init = _library.gnutls_init

655

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

656

init.restype = _error_code

657

658

set_default_priority = _library.gnutls_set_default_priority

659

set_default_priority.argtypes = [session_t]

660

set_default_priority.restype = _error_code

661

662

record_send = _library.gnutls_record_send

663

record_send.argtypes = [session_t, ctypes.c_void_p,

664

ctypes.c_size_t]

665

record_send.restype = ctypes.c_ssize_t

666

record_send.errcheck = _retry_on_error

667

668

certificate_allocate_credentials = (

669

_library.gnutls_certificate_allocate_credentials)

670

certificate_allocate_credentials.argtypes = [

671

ctypes.POINTER(certificate_credentials_t)]

672

certificate_allocate_credentials.restype = _error_code

673

674

certificate_free_credentials = (

675

_library.gnutls_certificate_free_credentials)

676

certificate_free_credentials.argtypes = [

677

certificate_credentials_t]

678

certificate_free_credentials.restype = None

679

680

handshake_set_private_extensions = (

681

_library.gnutls_handshake_set_private_extensions)

682

handshake_set_private_extensions.argtypes = [session_t,

683

ctypes.c_int]

684

handshake_set_private_extensions.restype = None

685

686

credentials_set = _library.gnutls_credentials_set

687

credentials_set.argtypes = [session_t, credentials_type_t,

688

ctypes.c_void_p]

689

credentials_set.restype = _error_code

690

691

strerror = _library.gnutls_strerror

692

strerror.argtypes = [ctypes.c_int]

693

strerror.restype = ctypes.c_char_p

694

695

certificate_type_get = _library.gnutls_certificate_type_get

696

certificate_type_get.argtypes = [session_t]

697

certificate_type_get.restype = _error_code

698

699

certificate_get_peers = _library.gnutls_certificate_get_peers

700

certificate_get_peers.argtypes = [session_t,

701

ctypes.POINTER(ctypes.c_uint)]

702

certificate_get_peers.restype = ctypes.POINTER(datum_t)

703

704

global_set_log_level = _library.gnutls_global_set_log_level

705

global_set_log_level.argtypes = [ctypes.c_int]

706

global_set_log_level.restype = None

707

708

global_set_log_function = _library.gnutls_global_set_log_function

709

global_set_log_function.argtypes = [log_func]

710

global_set_log_function.restype = None

711

712

deinit = _library.gnutls_deinit

713

deinit.argtypes = [session_t]

714

deinit.restype = None

715

716

handshake = _library.gnutls_handshake

717

handshake.argtypes = [session_t]

718

handshake.restype = _error_code

719

handshake.errcheck = _retry_on_error

720

721

transport_set_ptr = _library.gnutls_transport_set_ptr

722

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

723

transport_set_ptr.restype = None

724

725

bye = _library.gnutls_bye

726

bye.argtypes = [session_t, close_request_t]

727

bye.restype = _error_code

728

bye.errcheck = _retry_on_error

729

730

check_version = _library.gnutls_check_version

731

check_version.argtypes = [ctypes.c_char_p]

732

check_version.restype = ctypes.c_char_p

733

734

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

735

736

openpgp_crt_init = _library.gnutls_openpgp_crt_init

737

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

738

openpgp_crt_init.restype = _error_code

739

740

openpgp_crt_import = _library.gnutls_openpgp_crt_import

741

openpgp_crt_import.argtypes = [openpgp_crt_t,

742

ctypes.POINTER(datum_t),

743

openpgp_crt_fmt_t]

744

openpgp_crt_import.restype = _error_code

745

746

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

747

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

748

ctypes.POINTER(ctypes.c_uint)]

749

openpgp_crt_verify_self.restype = _error_code

750

751

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

752

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

753

openpgp_crt_deinit.restype = None

754

755

openpgp_crt_get_fingerprint = (

756

_library.gnutls_openpgp_crt_get_fingerprint)

757

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

758

ctypes.c_void_p,

759

ctypes.POINTER(

760

ctypes.c_size_t)]

761

openpgp_crt_get_fingerprint.restype = _error_code

762

763

# Remove non-public functions

764

del _error_code, _retry_on_error

765

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

766

gnutls = GnuTLS()

767

768

769

def call_pipe(connection, # : multiprocessing.Connection

770

func, *args, **kwargs):

771

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

772

773

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

774

return value on the provided multiprocessing.Connection.

775

"""

776

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

777

connection.close()

778

779

427

780

class Client(object):

428

781

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

429

782

430

783

Attributes:

431

784

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

432

785

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

434

787

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

435

788

to see if the client lives.

436

789

'None' if no process is running.

437

checker_callback_tag: a gobject event source tag, or None

790

checker_callback_tag: a GLib event source tag, or None

438

791

checker_command: string; External command which is run to check

439

792

if client lives. %() expansions are done at

440

793

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

441

794

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

442

checker_initiator_tag: a gobject event source tag, or None

795

checker_initiator_tag: a GLib event source tag, or None

443

796

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

444

797

client_structure: Object describing what attributes a client has

445

798

and is used for storing the client at exit

446

799

current_checker_command: string; current running checker_command

447

disable_initiator_tag: a gobject event source tag, or None

800

disable_initiator_tag: a GLib event source tag, or None

448

801

enabled: bool()

449

802

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

450

803

uniquely identify the client

455

808

last_checker_status: integer between 0 and 255 reflecting exit

456

809

status of last checker. -1 reflects crashed

457

810

checker, -2 means no checker completed yet.

811

last_checker_signal: The signal which killed the last checker, if

812

last_checker_status is -1

458

813

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

459

814

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

460

815

D-Bus identifiers

467

822

disabled, or None

468

823

server_settings: The server_settings dict from main()

469

824

"""

470

825

471

826

runtime_expansions = ("approval_delay", "approval_duration",

472

827

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

473

828

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

484

839

"approved_by_default": "True",

485

840

"enabled": "True",

486

841

}

487

842

488

843

@staticmethod

489

844

def config_parser(config):

490

845

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

497

852

for client_name in config.sections():

498

853

section = dict(config.items(client_name))

499

854

client = settings[client_name] = {}

500

855

501

856

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

502

857

# Reformat values from string types to Python types

503

858

client["approved_by_default"] = config.getboolean(

504

859

client_name, "approved_by_default")

505

860

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

506

861

"enabled")

507

862

508

863

# Uppercase and remove spaces from fingerprint for later

509

864

# comparison purposes with return value from the

510

865

# fingerprint() function

511

866

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

512

867

.replace(" ", ""))

513

868

if "secret" in section:

514

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

869

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

870

.encode("utf-8"),

871

"base64")

515

872

elif "secfile" in section:

516

873

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

517

874

(section["secfile"])),

532

889

client["last_approval_request"] = None

533

890

client["last_checked_ok"] = None

534

891

client["last_checker_status"] = -2

535

892

536

893

return settings

537

538

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

894

895

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

539

896

self.name = name

540

897

if server_settings is None:

541

898

server_settings = {}

543

900

# adding all client settings

544

901

for setting, value in settings.items():

545

902

setattr(self, setting, value)

546

903

547

904

if self.enabled:

548

905

if not hasattr(self, "last_enabled"):

549

906

self.last_enabled = datetime.datetime.utcnow()

553

910

else:

554

911

self.last_enabled = None

555

912

self.expires = None

556

913

557

914

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

558

915

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

559

916

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

560

917

datetime.datetime.utcnow())

561

918

562

919

# attributes specific for this server instance

563

920

self.checker = None

564

921

self.checker_initiator_tag = None

570

927

self.changedstate = multiprocessing_manager.Condition(

571

928

multiprocessing_manager.Lock())

572

929

self.client_structure = [attr

573

for attr in self.__dict__.iterkeys()

930

for attr in self.__dict__.keys()

574

931

if not attr.startswith("_")]

575

932

self.client_structure.append("client_structure")

576

933

577

934

for name, t in inspect.getmembers(

578

935

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

579

936

if not name.startswith("_"):

580

937

self.client_structure.append(name)

581

938

582

939

# Send notice to process children that client state has changed

583

940

def send_changedstate(self):

584

941

with self.changedstate:

585

942

self.changedstate.notify_all()

586

943

587

944

def enable(self):

588

945

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

589

946

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

594

951

self.last_enabled = datetime.datetime.utcnow()

595

952

self.init_checker()

596

953

self.send_changedstate()

597

954

598

955

def disable(self, quiet=True):

599

956

"""Disable this client."""

600

957

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

602

959

if not quiet:

603

960

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

604

961

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

605

gobject.source_remove(self.disable_initiator_tag)

962

GLib.source_remove(self.disable_initiator_tag)

606

963

self.disable_initiator_tag = None

607

964

self.expires = None

608

965

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

609

gobject.source_remove(self.checker_initiator_tag)

966

GLib.source_remove(self.checker_initiator_tag)

610

967

self.checker_initiator_tag = None

611

968

self.stop_checker()

612

969

self.enabled = False

613

970

if not quiet:

614

971

self.send_changedstate()

615

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

972

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

616

973

return False

617

974

618

975

def __del__(self):

619

976

self.disable()

620

977

621

978

def init_checker(self):

622

979

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

623

980

# and every interval from then on.

624

981

if self.checker_initiator_tag is not None:

625

gobject.source_remove(self.checker_initiator_tag)

626

self.checker_initiator_tag = gobject.timeout_add(

982

GLib.source_remove(self.checker_initiator_tag)

983

self.checker_initiator_tag = GLib.timeout_add(

627

984

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

628

985

self.start_checker)

629

986

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

630

987

if self.disable_initiator_tag is not None:

631

gobject.source_remove(self.disable_initiator_tag)

632

self.disable_initiator_tag = gobject.timeout_add(

988

GLib.source_remove(self.disable_initiator_tag)

989

self.disable_initiator_tag = GLib.timeout_add(

633

990

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

634

991

# Also start a new checker *right now*.

635

992

self.start_checker()

636

637

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

993

994

def checker_callback(self, source, condition, connection,

995

command):

638

996

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

639

997

self.checker_callback_tag = None

640

998

self.checker = None

641

if os.WIFEXITED(condition):

642

self.last_checker_status = os.WEXITSTATUS(condition)

999

# Read return code from connection (see call_pipe)

1000

returncode = connection.recv()

1001

connection.close()

1002

1003

if returncode >= 0:

1004

self.last_checker_status = returncode

1005

self.last_checker_signal = None

643

1006

if self.last_checker_status == 0:

644

1007

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

645

1008

vars(self))

648

1011

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

649

1012

else:

650

1013

self.last_checker_status = -1

1014

self.last_checker_signal = -returncode

651

1015

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

652

1016

vars(self))

653

1017

return False

1018

654

1019

def checked_ok(self):

655

1020

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

656

1021

self.last_checked_ok = datetime.datetime.utcnow()

657

1022

self.last_checker_status = 0

1023

self.last_checker_signal = None

658

1024

self.bump_timeout()

659

1025

660

1026

def bump_timeout(self, timeout=None):

661

1027

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

662

1028

if timeout is None:

663

1029

timeout = self.timeout

664

1030

if self.disable_initiator_tag is not None:

665

gobject.source_remove(self.disable_initiator_tag)

1031

GLib.source_remove(self.disable_initiator_tag)

666

1032

self.disable_initiator_tag = None

667

1033

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

668

self.disable_initiator_tag = gobject.timeout_add(

1034

self.disable_initiator_tag = GLib.timeout_add(

669

1035

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

670

1036

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

671

1037

672

1038

def need_approval(self):

673

1039

self.last_approval_request = datetime.datetime.utcnow()

674

1040

675

1041

def start_checker(self):

676

1042

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

677

1043

678

1044

If a checker already exists, leave it running and do

679

1045

nothing."""

680

1046

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

685

1051

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

686

1052

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

687

1053

# 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)

1054

1055

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

1056

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

1057

self.checker.join()

1058

self.checker = None

703

1059

# Start a new checker if needed

704

1060

if self.checker is None:

705

1061

# Escape attributes for the shell

706

1062

escaped_attrs = {

707

1063

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

708

for attr in self.runtime_expansions }

1064

for attr in self.runtime_expansions}

709

1065

try:

710

1066

command = self.checker_command % escaped_attrs

711

1067

except TypeError as error:

714

1070

exc_info=error)

715

1071

return True # Try again later

716

1072

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

1073

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

1074

self.name)

1075

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

1076

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

1077

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

1078

# always replaced by /dev/null.)

1079

# The exception is when not debugging but nevertheless

1080

# running in the foreground; use the previously

1081

# created wnull.

1082

popen_args = {"close_fds": True,

1083

"shell": True,

1084

"cwd": "/"}

1085

if (not self.server_settings["debug"]

1086

and self.server_settings["foreground"]):

1087

popen_args.update({"stdout": wnull,

1088

"stderr": wnull})

1089

pipe = multiprocessing.Pipe(duplex=False)

1090

self.checker = multiprocessing.Process(

1091

target=call_pipe,

1092

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

1093

kwargs=popen_args)

1094

self.checker.start()

1095

self.checker_callback_tag = GLib.io_add_watch(

1096

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

1097

self.checker_callback, pipe[0], command)

1098

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

758

1099

return True

759

1100

760

1101

def stop_checker(self):

761

1102

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

762

1103

if self.checker_callback_tag:

763

gobject.source_remove(self.checker_callback_tag)

1104

GLib.source_remove(self.checker_callback_tag)

764

1105

self.checker_callback_tag = None

765

1106

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

766

1107

return

767

1108

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

1109

self.checker.terminate()

776

1110

self.checker = None

777

1111

778

1112

782

1116

byte_arrays=False):

783

1117

"""Decorators for marking methods of a DBusObjectWithProperties to

784

1118

become properties on the D-Bus.

785

1119

786

1120

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

787

1121

and with one argument by "Set".

788

1122

789

1123

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

790

1124

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

791

1125

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

795

1129

if byte_arrays and signature != "ay":

796

1130

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

797

1131

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

798

1132

799

1133

def decorator(func):

800

1134

func._dbus_is_property = True

801

1135

func._dbus_interface = dbus_interface

804

1138

func._dbus_name = func.__name__

805

1139

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

806

1140

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

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1141

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

808

1142

return func

809

1143

810

1144

return decorator

811

1145

812

1146

813

1147

def dbus_interface_annotations(dbus_interface):

814

1148

"""Decorator for marking functions returning interface annotations

815

1149

816

1150

Usage:

817

1151

818

1152

@dbus_interface_annotations("org.example.Interface")

819

1153

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

820

1154

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

821

1155

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

822

1156

"false"}

823

1157

"""

824

1158

825

1159

def decorator(func):

826

1160

func._dbus_is_interface = True

827

1161

func._dbus_interface = dbus_interface

828

1162

func._dbus_name = dbus_interface

829

1163

return func

830

1164

831

1165

return decorator

832

1166

833

1167

834

1168

def dbus_annotations(annotations):

835

1169

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

836

1170

Usage:

837

1171

838

1172

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

839

1173

"org.freedesktop.DBus.Property."

840

1174

"EmitsChangedSignal": "false"})

842

1176

access="r")

843

1177

def Property_dbus_property(self):

844

1178

return dbus.Boolean(False)

1179

1180

See also the DBusObjectWithAnnotations class.

845

1181

"""

846

1182

847

1183

def decorator(func):

848

1184

func._dbus_annotations = annotations

849

1185

return func

850

1186

851

1187

return decorator

852

1188

853

1189

869

1205

pass

870

1206

871

1207

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.

1208

class DBusObjectWithAnnotations(dbus.service.Object):

1209

"""A D-Bus object with annotations.

1210

1211

Classes inheriting from this can use the dbus_annotations

1212

decorator to add annotations to methods or signals.

878

1213

"""

879

1214

880

1215

@staticmethod

881

1216

def _is_dbus_thing(thing):

882

1217

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

883

1218

884

1219

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

885

1220

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

886

1221

"""

887

1222

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

888

1223

False)

889

1224

890

1225

def _get_all_dbus_things(self, thing):

891

1226

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

892

1227

"""

895

1230

for cls in self.__class__.__mro__

896

1231

for name, athing in

897

1232

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

898

1233

1234

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1235

out_signature="s",

1236

path_keyword='object_path',

1237

connection_keyword='connection')

1238

def Introspect(self, object_path, connection):

1239

"""Overloading of standard D-Bus method.

1240

1241

Inserts annotation tags on methods and signals.

1242

"""

1243

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

1244

connection)

1245

try:

1246

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

1247

1248

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

1249

# Add annotation tags

1250

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

1251

for tag in if_tag.getElementsByTagName(typ):

1252

annots = dict()

1253

for name, prop in (self.

1254

_get_all_dbus_things(typ)):

1255

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

1256

and prop._dbus_interface

1257

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

1258

annots.update(getattr(

1259

prop, "_dbus_annotations", {}))

1260

for name, value in annots.items():

1261

ann_tag = document.createElement(

1262

"annotation")

1263

ann_tag.setAttribute("name", name)

1264

ann_tag.setAttribute("value", value)

1265

tag.appendChild(ann_tag)

1266

# Add interface annotation tags

1267

for annotation, value in dict(

1268

itertools.chain.from_iterable(

1269

annotations().items()

1270

for name, annotations

1271

in self._get_all_dbus_things("interface")

1272

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

1273

)).items():

1274

ann_tag = document.createElement("annotation")

1275

ann_tag.setAttribute("name", annotation)

1276

ann_tag.setAttribute("value", value)

1277

if_tag.appendChild(ann_tag)

1278

# Fix argument name for the Introspect method itself

1279

if (if_tag.getAttribute("name")

1280

== dbus.INTROSPECTABLE_IFACE):

1281

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

1282

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

1283

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

1284

if (arg.getAttribute("direction")

1285

== "out"):

1286

arg.setAttribute("name",

1287

"xml_data")

1288

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

1289

document.unlink()

1290

except (AttributeError, xml.dom.DOMException,

1291

xml.parsers.expat.ExpatError) as error:

1292

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

1293

exc_info=error)

1294

return xmlstring

1295

1296

1297

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1298

"""A D-Bus object with properties.

1299

1300

Classes inheriting from this can use the dbus_service_property

1301

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

1302

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

1303

"""

1304

899

1305

def _get_dbus_property(self, interface_name, property_name):

900

1306

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

901

1307

property with the specified name and interface.

906

1312

if (value._dbus_name == property_name

907

1313

and value._dbus_interface == interface_name):

908

1314

return value.__get__(self)

909

1315

910

1316

# No such property

911

1317

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

912

1318

self.dbus_object_path, interface_name, property_name))

913

1319

1320

@classmethod

1321

def _get_all_interface_names(cls):

1322

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

1323

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

1324

"_dbus_interface", None)

1325

for x in (inspect.getmro(cls))

1326

for attr in dir(x))

1327

if name is not None)

1328

914

1329

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

1330

in_signature="ss",

916

1331

out_signature="v")

924

1339

if not hasattr(value, "variant_level"):

925

1340

return value

926

1341

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

927

1342

928

1343

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

929

1344

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

930

1345

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

942

1357

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

943

1358

for byte in value))

944

1359

prop(value)

945

1360

946

1361

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

1362

in_signature="s",

948

1363

out_signature="a{sv}")

949

1364

def GetAll(self, interface_name):

950

1365

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

951

1366

standard.

952

1367

953

1368

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

954

1369

"""

955

1370

properties = {}

966

1381

properties[name] = value

967

1382

continue

968

1383

properties[name] = type(value)(

969

value, variant_level = value.variant_level + 1)

1384

value, variant_level=value.variant_level + 1)

970

1385

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

971

1386

972

1387

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

973

1388

def PropertiesChanged(self, interface_name, changed_properties,

974

1389

invalidated_properties):

976

1391

standard.

977

1392

"""

978

1393

pass

979

1394

980

1395

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

981

1396

out_signature="s",

982

1397

path_keyword='object_path',

983

1398

connection_keyword='connection')

984

1399

def Introspect(self, object_path, connection):

985

1400

"""Overloading of standard D-Bus method.

986

1401

987

1402

Inserts property tags and interface annotation tags.

988

1403

"""

989

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

990

connection)

1404

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1405

object_path,

1406

connection)

991

1407

try:

992

1408

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

993

1409

994

1410

def make_tag(document, name, prop):

995

1411

e = document.createElement("property")

996

1412

e.setAttribute("name", name)

997

1413

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

998

1414

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

999

1415

return e

1000

1416

1001

1417

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

1002

1418

# Add property tags

1003

1419

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

1006

1422

if prop._dbus_interface

1007

1423

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

1008

1424

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)

1425

# Add annotation tags for properties

1426

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

1427

annots = dict()

1428

for name, prop in self._get_all_dbus_things(

1429

"property"):

1430

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

1431

and prop._dbus_interface

1432

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

1433

annots.update(getattr(

1434

prop, "_dbus_annotations", {}))

1435

for name, value in annots.items():

1436

ann_tag = document.createElement(

1437

"annotation")

1438

ann_tag.setAttribute("name", name)

1439

ann_tag.setAttribute("value", value)

1440

tag.appendChild(ann_tag)

1038

1441

# Add the names to the return values for the

1039

1442

# "org.freedesktop.DBus.Properties" methods

1040

1443

if (if_tag.getAttribute("name")

1059

1462

return xmlstring

1060

1463

1061

1464

1465

try:

1466

dbus.OBJECT_MANAGER_IFACE

1467

except AttributeError:

1468

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

1469

1470

1471

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1472

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

1473

1474

Classes inheriting from this exposes the standard

1475

GetManagedObjects call and the InterfacesAdded and

1476

InterfacesRemoved signals on the standard

1477

"org.freedesktop.DBus.ObjectManager" interface.

1478

1479

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

1480

manually.

1481

"""

1482

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1483

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

1484

def GetManagedObjects(self):

1485

"""This function must be overridden"""

1486

raise NotImplementedError()

1487

1488

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1489

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

1490

def InterfacesAdded(self, object_path, interfaces_and_properties):

1491

pass

1492

1493

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

1494

def InterfacesRemoved(self, object_path, interfaces):

1495

pass

1496

1497

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1498

out_signature="s",

1499

path_keyword='object_path',

1500

connection_keyword='connection')

1501

def Introspect(self, object_path, connection):

1502

"""Overloading of standard D-Bus method.

1503

1504

Override return argument name of GetManagedObjects to be

1505

"objpath_interfaces_and_properties"

1506

"""

1507

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1508

object_path,

1509

connection)

1510

try:

1511

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

1512

1513

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

1514

# Fix argument name for the GetManagedObjects method

1515

if (if_tag.getAttribute("name")

1516

== dbus.OBJECT_MANAGER_IFACE):

1517

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

1518

if (cn.getAttribute("name")

1519

== "GetManagedObjects"):

1520

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

1521

if (arg.getAttribute("direction")

1522

== "out"):

1523

arg.setAttribute(

1524

"name",

1525

"objpath_interfaces"

1526

"_and_properties")

1527

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

1528

document.unlink()

1529

except (AttributeError, xml.dom.DOMException,

1530

xml.parsers.expat.ExpatError) as error:

1531

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

1532

exc_info=error)

1533

return xmlstring

1534

1535

1062

1536

def datetime_to_dbus(dt, variant_level=0):

1063

1537

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

1064

1538

if dt is None:

1065

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

1539

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

1066

1540

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

1067

1541

1068

1542

1071

1545

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

1072

1546

interface names according to the "alt_interface_names" mapping.

1073

1547

Usage:

1074

1548

1075

1549

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

1076

1550

"net.example.AlternateInterface"})

1077

1551

class SampleDBusObject(dbus.service.Object):

1078

1552

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

1079

1553

def SampleDBusMethod():

1080

1554

pass

1081

1555

1082

1556

The above "SampleDBusMethod" on "SampleDBusObject" will be

1083

1557

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

1084

1558

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

1085

1559

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

1086

1560

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

1087

1561

1088

1562

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

1089

1563

(from DBusObjectWithProperties) and interfaces (from the

1090

1564

dbus_interface_annotations decorator).

1091

1565

"""

1092

1566

1093

1567

def wrapper(cls):

1094

1568

for orig_interface_name, alt_interface_name in (

1095

1569

alt_interface_names.items()):

1112

1586

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

1113

1587

# Extract the original non-method undecorated

1114

1588

# function by black magic

1115

nonmethod_func = (dict(

1116

zip(attribute.func_code.co_freevars,

1117

attribute.__closure__))

1118

["func"].cell_contents)

1589

if sys.version_info.major == 2:

1590

nonmethod_func = (dict(

1591

zip(attribute.func_code.co_freevars,

1592

attribute.__closure__))

1593

["func"].cell_contents)

1594

else:

1595

nonmethod_func = (dict(

1596

zip(attribute.__code__.co_freevars,

1597

attribute.__closure__))

1598

["func"].cell_contents)

1119

1599

# Create a new, but exactly alike, function

1120

1600

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

1121

1601

# with the alternate D-Bus interface name

1602

new_function = copy_function(nonmethod_func)

1122

1603

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)))

1604

alt_interface,

1605

attribute._dbus_signature)(new_function))

1130

1606

# Copy annotations, if any

1131

1607

try:

1132

1608

new_function._dbus_annotations = dict(

1133

1609

attribute._dbus_annotations)

1134

1610

except AttributeError:

1135

1611

pass

1612

1136

1613

# Define a creator of a function to call both the

1137

1614

# original and alternate functions, so both the

1138

1615

# original and alternate signals gets sent when

1141

1618

"""This function is a scope container to pass

1142

1619

func1 and func2 to the "call_both" function

1143

1620

outside of its arguments"""

1144

1621

1622

@functools.wraps(func2)

1145

1623

def call_both(*args, **kwargs):

1146

1624

"""This function will emit two D-Bus

1147

1625

signals by calling func1 and func2"""

1148

1626

func1(*args, **kwargs)

1149

1627

func2(*args, **kwargs)

1150

1628

# Make wrapper function look like a D-Bus

1629

# signal

1630

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

1631

if name.startswith("_dbus_"):

1632

setattr(call_both, name, attr)

1633

1151

1634

return call_both

1152

1635

# Create the "call_both" function and add it to

1153

1636

# the class

1163

1646

alt_interface,

1164

1647

attribute._dbus_in_signature,

1165

1648

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)))

1649

(copy_function(attribute)))

1171

1650

# Copy annotations, if any

1172

1651

try:

1173

1652

attr[attrname]._dbus_annotations = dict(

1185

1664

attribute._dbus_access,

1186

1665

attribute._dbus_get_args_options

1187

1666

["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)))

1667

(copy_function(attribute)))

1194

1668

# Copy annotations, if any

1195

1669

try:

1196

1670

attr[attrname]._dbus_annotations = dict(

1205

1679

# to the class.

1206

1680

attr[attrname] = (

1207

1681

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)))

1682

(copy_function(attribute)))

1213

1683

if deprecate:

1214

1684

# Deprecate all alternate interfaces

1215

iname="_AlternateDBusNames_interface_annotation{}"

1685

iname = "_AlternateDBusNames_interface_annotation{}"

1216

1686

for interface_name in interface_names:

1217

1687

1218

1688

@dbus_interface_annotations(interface_name)

1219

1689

def func(self):

1220

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

1221

"true" }

1690

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

1691

"true"}

1222

1692

# Find an unused name

1223

1693

for aname in (iname.format(i)

1224

1694

for i in itertools.count()):

1228

1698

if interface_names:

1229

1699

# Replace the class with a new subclass of it with

1230

1700

# methods, signals, etc. as created above.

1231

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

1232

(cls, ), attr)

1701

if sys.version_info.major == 2:

1702

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

1703

(cls, ), attr)

1704

else:

1705

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

1706

(cls, ), attr)

1233

1707

return cls

1234

1708

1235

1709

return wrapper

1236

1710

1237

1711

1239

1713

"se.bsnet.fukt.Mandos"})

1240

1714

class ClientDBus(Client, DBusObjectWithProperties):

1241

1715

"""A Client class using D-Bus

1242

1716

1243

1717

Attributes:

1244

1718

dbus_object_path: dbus.ObjectPath

1245

1719

bus: dbus.SystemBus()

1246

1720

"""

1247

1721

1248

1722

runtime_expansions = (Client.runtime_expansions

1249

1723

+ ("dbus_object_path", ))

1250

1724

1251

1725

_interface = "se.recompile.Mandos.Client"

1252

1726

1253

1727

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

1254

1255

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

1728

1729

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

1256

1730

self.bus = bus

1257

1731

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

1258

1732

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

1264

1738

"/clients/" + client_object_name)

1265

1739

DBusObjectWithProperties.__init__(self, self.bus,

1266

1740

self.dbus_object_path)

1267

1741

1268

1742

def notifychangeproperty(transform_func, dbus_name,

1269

1743

type_func=lambda x: x,

1270

1744

variant_level=1,

1272

1746

_interface=_interface):

1273

1747

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

1274

1748

its changes to DBus.

1275

1749

1276

1750

transform_fun: Function that takes a value and a variant_level

1277

1751

and transforms it to a D-Bus type.

1278

1752

dbus_name: D-Bus name of the variable

1281

1755

variant_level: D-Bus variant level. Default: 1

1282

1756

"""

1283

1757

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

1284

1758

1285

1759

def setter(self, value):

1286

1760

if hasattr(self, "dbus_object_path"):

1287

1761

if (not hasattr(self, attrname) or

1294

1768

else:

1295

1769

dbus_value = transform_func(

1296

1770

type_func(value),

1297

variant_level = variant_level)

1771

variant_level=variant_level)

1298

1772

self.PropertyChanged(dbus.String(dbus_name),

1299

1773

dbus_value)

1300

1774

self.PropertiesChanged(

1301

1775

_interface,

1302

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

1303

dbus_value }),

1776

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

1777

dbus_value}),

1304

1778

dbus.Array())

1305

1779

setattr(self, attrname, value)

1306

1780

1307

1781

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

1308

1782

1309

1783

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1310

1784

approvals_pending = notifychangeproperty(dbus.Boolean,

1311

1785

"ApprovalPending",

1312

type_func = bool)

1786

type_func=bool)

1313

1787

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

1314

1788

last_enabled = notifychangeproperty(datetime_to_dbus,

1315

1789

"LastEnabled")

1316

1790

checker = notifychangeproperty(

1317

1791

dbus.Boolean, "CheckerRunning",

1318

type_func = lambda checker: checker is not None)

1792

type_func=lambda checker: checker is not None)

1319

1793

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1320

1794

"LastCheckedOK")

1321

1795

last_checker_status = notifychangeproperty(dbus.Int16,

1326

1800

"ApprovedByDefault")

1327

1801

approval_delay = notifychangeproperty(

1328

1802

dbus.UInt64, "ApprovalDelay",

1329

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

1803

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

1330

1804

approval_duration = notifychangeproperty(

1331

1805

dbus.UInt64, "ApprovalDuration",

1332

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

1806

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

1333

1807

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

1334

1808

timeout = notifychangeproperty(

1335

1809

dbus.UInt64, "Timeout",

1336

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

1810

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

1337

1811

extended_timeout = notifychangeproperty(

1338

1812

dbus.UInt64, "ExtendedTimeout",

1339

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

1813

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

1340

1814

interval = notifychangeproperty(

1341

1815

dbus.UInt64, "Interval",

1342

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

1816

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

1343

1817

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

1344

1818

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

1345

1819

invalidate_only=True)

1346

1820

1347

1821

del notifychangeproperty

1348

1822

1349

1823

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

1350

1824

try:

1351

1825

self.remove_from_connection()

1354

1828

if hasattr(DBusObjectWithProperties, "__del__"):

1355

1829

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

1356

1830

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)

1831

1832

def checker_callback(self, source, condition,

1833

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

1834

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

1835

connection, command, *args,

1836

**kwargs)

1837

exitstatus = self.last_checker_status

1838

if exitstatus >= 0:

1364

1839

# Emit D-Bus signal

1365

1840

self.CheckerCompleted(dbus.Int16(exitstatus),

1366

dbus.Int64(condition),

1841

# This is specific to GNU libC

1842

dbus.Int64(exitstatus << 8),

1367

1843

dbus.String(command))

1368

1844

else:

1369

1845

# Emit D-Bus signal

1370

1846

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

1371

dbus.Int64(condition),

1847

dbus.Int64(

1848

# This is specific to GNU libC

1849

(exitstatus << 8)

1850

| self.last_checker_signal),

1372

1851

dbus.String(command))

1373

1374

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

1375

*args, **kwargs)

1376

1852

return ret

1853

1377

1854

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

1378

1855

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

1379

1856

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

1383

1860

# Emit D-Bus signal

1384

1861

self.CheckerStarted(self.current_checker_command)

1385

1862

return r

1386

1863

1387

1864

def _reset_approved(self):

1388

1865

self.approved = None

1389

1866

return False

1390

1867

1391

1868

def approve(self, value=True):

1392

1869

self.approved = value

1393

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

1394

* 1000), self._reset_approved)

1870

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

1871

* 1000), self._reset_approved)

1395

1872

self.send_changedstate()

1396

1397

## D-Bus methods, signals & properties

1398

1399

## Interfaces

1400

1401

## Signals

1402

1873

1874

# D-Bus methods, signals & properties

1875

1876

# Interfaces

1877

1878

# Signals

1879

1403

1880

# CheckerCompleted - signal

1404

1881

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

1405

1882

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

1406

1883

"D-Bus signal"

1407

1884

pass

1408

1885

1409

1886

# CheckerStarted - signal

1410

1887

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

1411

1888

def CheckerStarted(self, command):

1412

1889

"D-Bus signal"

1413

1890

pass

1414

1891

1415

1892

# PropertyChanged - signal

1416

1893

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

1417

1894

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

1418

1895

def PropertyChanged(self, property, value):

1419

1896

"D-Bus signal"

1420

1897

pass

1421

1898

1422

1899

# GotSecret - signal

1423

1900

@dbus.service.signal(_interface)

1424

1901

def GotSecret(self):

1427

1904

server to mandos-client

1428

1905

"""

1429

1906

pass

1430

1907

1431

1908

# Rejected - signal

1432

1909

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

1433

1910

def Rejected(self, reason):

1434

1911

"D-Bus signal"

1435

1912

pass

1436

1913

1437

1914

# NeedApproval - signal

1438

1915

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

1439

1916

def NeedApproval(self, timeout, default):

1440

1917

"D-Bus signal"

1441

1918

return self.need_approval()

1442

1443

## Methods

1444

1919

1920

# Methods

1921

1445

1922

# Approve - method

1446

1923

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

1447

1924

def Approve(self, value):

1448

1925

self.approve(value)

1449

1926

1450

1927

# CheckedOK - method

1451

1928

@dbus.service.method(_interface)

1452

1929

def CheckedOK(self):

1453

1930

self.checked_ok()

1454

1931

1455

1932

# Enable - method

1933

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

1456

1934

@dbus.service.method(_interface)

1457

1935

def Enable(self):

1458

1936

"D-Bus method"

1459

1937

self.enable()

1460

1938

1461

1939

# StartChecker - method

1940

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

1462

1941

@dbus.service.method(_interface)

1463

1942

def StartChecker(self):

1464

1943

"D-Bus method"

1465

1944

self.start_checker()

1466

1945

1467

1946

# Disable - method

1947

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

1468

1948

@dbus.service.method(_interface)

1469

1949

def Disable(self):

1470

1950

"D-Bus method"

1471

1951

self.disable()

1472

1952

1473

1953

# StopChecker - method

1954

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

1474

1955

@dbus.service.method(_interface)

1475

1956

def StopChecker(self):

1476

1957

self.stop_checker()

1477

1478

## Properties

1479

1958

1959

# Properties

1960

1480

1961

# ApprovalPending - property

1481

1962

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

1482

1963

def ApprovalPending_dbus_property(self):

1483

1964

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

1484

1965

1485

1966

# ApprovedByDefault - property

1486

1967

@dbus_service_property(_interface,

1487

1968

signature="b",

1490

1971

if value is None: # get

1491

1972

return dbus.Boolean(self.approved_by_default)

1492

1973

self.approved_by_default = bool(value)

1493

1974

1494

1975

# ApprovalDelay - property

1495

1976

@dbus_service_property(_interface,

1496

1977

signature="t",

1500

1981

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

1501

1982

* 1000)

1502

1983

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

1503

1984

1504

1985

# ApprovalDuration - property

1505

1986

@dbus_service_property(_interface,

1506

1987

signature="t",

1510

1991

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

1511

1992

* 1000)

1512

1993

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

1513

1994

1514

1995

# Name - property

1996

@dbus_annotations(

1997

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

1515

1998

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

1516

1999

def Name_dbus_property(self):

1517

2000

return dbus.String(self.name)

1518

2001

1519

2002

# Fingerprint - property

2003

@dbus_annotations(

2004

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

1520

2005

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

1521

2006

def Fingerprint_dbus_property(self):

1522

2007

return dbus.String(self.fingerprint)

1523

2008

1524

2009

# Host - property

1525

2010

@dbus_service_property(_interface,

1526

2011

signature="s",

1529

2014

if value is None: # get

1530

2015

return dbus.String(self.host)

1531

2016

self.host = str(value)

1532

2017

1533

2018

# Created - property

2019

@dbus_annotations(

2020

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

1534

2021

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

1535

2022

def Created_dbus_property(self):

1536

2023

return datetime_to_dbus(self.created)

1537

2024

1538

2025

# LastEnabled - property

1539

2026

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

1540

2027

def LastEnabled_dbus_property(self):

1541

2028

return datetime_to_dbus(self.last_enabled)

1542

2029

1543

2030

# Enabled - property

1544

2031

@dbus_service_property(_interface,

1545

2032

signature="b",

1551

2038

self.enable()

1552

2039

else:

1553

2040

self.disable()

1554

2041

1555

2042

# LastCheckedOK - property

1556

2043

@dbus_service_property(_interface,

1557

2044

signature="s",

1561

2048

self.checked_ok()

1562

2049

return

1563

2050

return datetime_to_dbus(self.last_checked_ok)

1564

2051

1565

2052

# LastCheckerStatus - property

1566

2053

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

1567

2054

def LastCheckerStatus_dbus_property(self):

1568

2055

return dbus.Int16(self.last_checker_status)

1569

2056

1570

2057

# Expires - property

1571

2058

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

1572

2059

def Expires_dbus_property(self):

1573

2060

return datetime_to_dbus(self.expires)

1574

2061

1575

2062

# LastApprovalRequest - property

1576

2063

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

1577

2064

def LastApprovalRequest_dbus_property(self):

1578

2065

return datetime_to_dbus(self.last_approval_request)

1579

2066

1580

2067

# Timeout - property

1581

2068

@dbus_service_property(_interface,

1582

2069

signature="t",

1597

2084

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

1598

2085

is None):

1599

2086

return

1600

gobject.source_remove(self.disable_initiator_tag)

1601

self.disable_initiator_tag = gobject.timeout_add(

2087

GLib.source_remove(self.disable_initiator_tag)

2088

self.disable_initiator_tag = GLib.timeout_add(

1602

2089

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

1603

2090

self.disable)

1604

2091

1605

2092

# ExtendedTimeout - property

1606

2093

@dbus_service_property(_interface,

1607

2094

signature="t",

1611

2098

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

1612

2099

* 1000)

1613

2100

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

1614

2101

1615

2102

# Interval - property

1616

2103

@dbus_service_property(_interface,

1617

2104

signature="t",

1624

2111

return

1625

2112

if self.enabled:

1626

2113

# Reschedule checker run

1627

gobject.source_remove(self.checker_initiator_tag)

1628

self.checker_initiator_tag = gobject.timeout_add(

2114

GLib.source_remove(self.checker_initiator_tag)

2115

self.checker_initiator_tag = GLib.timeout_add(

1629

2116

value, self.start_checker)

1630

self.start_checker() # Start one now, too

1631

2117

self.start_checker() # Start one now, too

2118

1632

2119

# Checker - property

1633

2120

@dbus_service_property(_interface,

1634

2121

signature="s",

1637

2124

if value is None: # get

1638

2125

return dbus.String(self.checker_command)

1639

2126

self.checker_command = str(value)

1640

2127

1641

2128

# CheckerRunning - property

1642

2129

@dbus_service_property(_interface,

1643

2130

signature="b",

1649

2136

self.start_checker()

1650

2137

else:

1651

2138

self.stop_checker()

1652

2139

1653

2140

# ObjectPath - property

2141

@dbus_annotations(

2142

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

2143

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

1654

2144

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

1655

2145

def ObjectPath_dbus_property(self):

1656

return self.dbus_object_path # is already a dbus.ObjectPath

1657

2146

return self.dbus_object_path # is already a dbus.ObjectPath

2147

1658

2148

# Secret = property

2149

@dbus_annotations(

2150

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

2151

"invalidates"})

1659

2152

@dbus_service_property(_interface,

1660

2153

signature="ay",

1661

2154

access="write",

1662

2155

byte_arrays=True)

1663

2156

def Secret_dbus_property(self, value):

1664

2157

self.secret = bytes(value)

1665

2158

1666

2159

del _interface

1667

2160

1668

2161

1671

2164

self._pipe = child_pipe

1672

2165

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

1673

2166

if not self._pipe.recv():

1674

raise KeyError()

1675

2167

raise KeyError(fpr)

2168

1676

2169

def __getattribute__(self, name):

1677

2170

if name == '_pipe':

1678

2171

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

1681

2174

if data[0] == 'data':

1682

2175

return data[1]

1683

2176

if data[0] == 'function':

1684

2177

1685

2178

def func(*args, **kwargs):

1686

2179

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

1687

2180

return self._pipe.recv()[1]

1688

2181

1689

2182

return func

1690

2183

1691

2184

def __setattr__(self, name, value):

1692

2185

if name == '_pipe':

1693

2186

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

1696

2189

1697

2190

class ClientHandler(socketserver.BaseRequestHandler, object):

1698

2191

"""A class to handle client connections.

1699

2192

1700

2193

Instantiated once for each connection to handle it.

1701

2194

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

1702

2195

1703

2196

def handle(self):

1704

2197

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

1705

2198

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

1706

2199

str(self.client_address))

1707

2200

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

1708

2201

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"))

2202

2203

session = gnutls.ClientSession(self.request)

2204

2205

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

2206

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

2207

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

2208

# "+DHE-DSS"))

1722

2209

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

1723

2210

priority = self.server.gnutls_priority

1724

2211

if priority is None:

1725

2212

priority = "NORMAL"

1726

gnutls.library.functions.gnutls_priority_set_direct(

1727

session._c_object, priority, None)

1728

2213

gnutls.priority_set_direct(session._c_object,

2214

priority.encode("utf-8"),

2215

None)

2216

1729

2217

# Start communication using the Mandos protocol

1730

2218

# Get protocol number

1731

2219

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

1736

2224

except (ValueError, IndexError, RuntimeError) as error:

1737

2225

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

1738

2226

return

1739

2227

1740

2228

# Start GnuTLS connection

1741

2229

try:

1742

2230

session.handshake()

1743

except gnutls.errors.GNUTLSError as error:

2231

except gnutls.Error as error:

1744

2232

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

1745

2233

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

1746

2234

# established. Just abandon the request.

1747

2235

return

1748

2236

logger.debug("Handshake succeeded")

1749

2237

1750

2238

approval_required = False

1751

2239

try:

1752

2240

try:

1753

2241

fpr = self.fingerprint(

1754

2242

self.peer_certificate(session))

1755

except (TypeError,

1756

gnutls.errors.GNUTLSError) as error:

2243

except (TypeError, gnutls.Error) as error:

1757

2244

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

1758

2245

return

1759

2246

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

1760

2247

1761

2248

try:

1762

2249

client = ProxyClient(child_pipe, fpr,

1763

2250

self.client_address)

1764

2251

except KeyError:

1765

2252

return

1766

2253

1767

2254

if client.approval_delay:

1768

2255

delay = client.approval_delay

1769

2256

client.approvals_pending += 1

1770

2257

approval_required = True

1771

2258

1772

2259

while True:

1773

2260

if not client.enabled:

1774

2261

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

1777

2264

# Emit D-Bus signal

1778

2265

client.Rejected("Disabled")

1779

2266

return

1780

2267

1781

2268

if client.approved or not client.approval_delay:

1782

#We are approved or approval is disabled

2269

# We are approved or approval is disabled

1783

2270

break

1784

2271

elif client.approved is None:

1785

2272

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

1796

2283

# Emit D-Bus signal

1797

2284

client.Rejected("Denied")

1798

2285

return

1799

1800

#wait until timeout or approved

2286

2287

# wait until timeout or approved

1801

2288

time = datetime.datetime.now()

1802

2289

client.changedstate.acquire()

1803

2290

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

1816

2303

break

1817

2304

else:

1818

2305

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

2306

2307

try:

2308

session.send(client.secret)

2309

except gnutls.Error as error:

2310

logger.warning("gnutls send failed",

2311

exc_info=error)

2312

return

2313

1833

2314

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

1834

2315

# bump the timeout using extended_timeout

1835

2316

client.bump_timeout(client.extended_timeout)

1836

2317

if self.server.use_dbus:

1837

2318

# Emit D-Bus signal

1838

2319

client.GotSecret()

1839

2320

1840

2321

finally:

1841

2322

if approval_required:

1842

2323

client.approvals_pending -= 1

1843

2324

try:

1844

2325

session.bye()

1845

except gnutls.errors.GNUTLSError as error:

2326

except gnutls.Error as error:

1846

2327

logger.warning("GnuTLS bye failed",

1847

2328

exc_info=error)

1848

2329

1849

2330

@staticmethod

1850

2331

def peer_certificate(session):

1851

2332

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

1852

2333

# 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

2334

if (gnutls.certificate_type_get(session._c_object)

2335

!= gnutls.CRT_OPENPGP):

2336

# ...return invalid data

2337

return b""

1858

2338

list_size = ctypes.c_uint(1)

1859

cert_list = (gnutls.library.functions

1860

.gnutls_certificate_get_peers

2339

cert_list = (gnutls.certificate_get_peers

1861

2340

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

1862

2341

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

1863

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

1864

" certificate")

2342

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

1865

2343

if list_size.value == 0:

1866

2344

return None

1867

2345

cert = cert_list[0]

1868

2346

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

1869

2347

1870

2348

@staticmethod

1871

2349

def fingerprint(openpgp):

1872

2350

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1873

2351

# New GnuTLS "datum" with the OpenPGP public key

1874

datum = gnutls.library.types.gnutls_datum_t(

2352

datum = gnutls.datum_t(

1875

2353

ctypes.cast(ctypes.c_char_p(openpgp),

1876

2354

ctypes.POINTER(ctypes.c_ubyte)),

1877

2355

ctypes.c_uint(len(openpgp)))

1878

2356

# 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))

2357

crt = gnutls.openpgp_crt_t()

2358

gnutls.openpgp_crt_init(ctypes.byref(crt))

1882

2359

# 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)

2360

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

2361

gnutls.OPENPGP_FMT_RAW)

1886

2362

# Verify the self signature in the key

1887

2363

crtverify = ctypes.c_uint()

1888

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1889

crt, 0, ctypes.byref(crtverify))

2364

gnutls.openpgp_crt_verify_self(crt, 0,

2365

ctypes.byref(crtverify))

1890

2366

if crtverify.value != 0:

1891

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1892

raise gnutls.errors.CertificateSecurityError(

1893

"Verify failed")

2367

gnutls.openpgp_crt_deinit(crt)

2368

raise gnutls.CertificateSecurityError(code

2369

=crtverify.value)

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:

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: