/mandos/release : revision 237.2.141

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

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#

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# Everything else is

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#

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

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from __future__ import division, with_statement, absolute_import

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import SocketServer as socketserver

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import socket

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import argparse

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import optparse

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import datetime

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import errno

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import gnutls.crypto

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import logging

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import logging.handlers

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import pwd

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import contextlib

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from contextlib import closing

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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import multiprocessing

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import dbus

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import dbus.service

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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:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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SO_BINDTODEVICE = None

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version = "1.3.1"

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version = "1.0.12"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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logger = logging.Logger(u'mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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

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u' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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

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u' %(levelname)s:'

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u' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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"""

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

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.group = None # our entry group

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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

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u" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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

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

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self.name)

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raise AvahiServiceError(u"Too many renames")

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

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

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unicode(self.name))

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syslogger.setFormatter(logging.Formatter

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

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

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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self.cleanup()

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os._exit(1)

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self.add()

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self .entry_group_state_changed))

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

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self.group.connect_to_signal('StateChanged',

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self.entry_group_state_changed)

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

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self.name, self.type)

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self.group.AddService(

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self.interface,

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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logger.debug("Zeroconf service established.")

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logger.debug(u"Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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logger.warning(u"Zeroconf service name collision.")

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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raise AvahiGroupError(u"State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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pass

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self.group.Free()

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self.group = None

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self.remove()

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

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def server_state_changed(self, state):

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

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

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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else:

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

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self.cleanup()

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if state == avahi.SERVER_COLLISION:

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logger.error(u"Zeroconf server name collision")

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self.remove()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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else:

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if error is None:

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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avahi.DBUS_PATH_SERVER,

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follow_name_owner_changes=True),

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avahi.DBUS_PATH_SERVER),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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self.server.connect_to_signal(u"StateChanged",

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self.server_state_changed)

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

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

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Attributes:

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

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

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

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D-Bus identifiers

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

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uniquely identify the client

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

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host: string; available for use by the checker command

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

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last_enabled: datetime.datetime(); (UTC)

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enabled: bool()

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

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

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until this client is invalid

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

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

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

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to see if the client lives.

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'None' if no process is running.

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checker_callback_tag: a gobject event source tag, or None

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checker_command: string; External command which is run to check

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if client lives. %() expansions are done at

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checker_initiator_tag: a gobject event source tag, or None

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disable_initiator_tag: - '' -

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checker_callback_tag: - '' -

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checker_command: string; External command which is run to check if

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client lives. %() expansions are done at

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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uniquely identify the client

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host: string; available for use by the checker command

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

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

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

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last_enabled: datetime.datetime(); (UTC)

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D-Bus identifiers

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

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

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until this client is disabled

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runtime_expansions: Allowed attributes for runtime expansion.

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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def _datetime_to_milliseconds(dt):

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"Convert a datetime.datetime() to milliseconds"

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

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+ (dt.seconds * 1000)

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+ (dt.microseconds // 1000))

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.timeout)

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return self._datetime_to_milliseconds(self.timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return self._timedelta_to_milliseconds(self.approval_delay)

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return self._datetime_to_milliseconds(self.interval)

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

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

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self.name = name

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if config is None:

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config = {}

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

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

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

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.replace(" ", ""))

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

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if "secret" in config:

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

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elif "secfile" in config:

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

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(config["secfile"])),

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"rb") as secfile:

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

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.replace(u" ", u""))

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

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if u"secret" in config:

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

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elif u"secfile" in config:

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with closing(open(os.path.expanduser

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(os.path.expandvars

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(config[u"secfile"])))) as secfile:

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self.secret = secfile.read()

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else:

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

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

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% self.name)

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

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

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self.created = datetime.datetime.utcnow()

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self.enabled = False

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self.last_approval_request = None

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self.last_enabled = None

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self.last_checked_ok = None

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

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

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

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

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self.disable_hook = disable_hook

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

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self.checker_callback_tag = None

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self.checker_command = config["checker"]

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self.checker_command = config[u"checker"]

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self.current_checker_command = None

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self.last_connect = None

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self._approved = None

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

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True)

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self.approvals_pending = 0

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self.approval_delay = string_to_delta(

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config["approval_delay"])

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self.approval_duration = string_to_delta(

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config["approval_duration"])

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

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def send_changedstate(self):

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self.changedstate.acquire()

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self.changedstate.notify_all()

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self.changedstate.release()

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def enable(self):

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

383

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

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

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# Already enabled

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return

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self.send_changedstate()

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self.last_enabled = datetime.datetime.utcnow()

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

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# and every interval from then on.

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self.checker_initiator_tag = (gobject.timeout_add

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(self.interval_milliseconds(),

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self.start_checker))

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# Also start a new checker *right now*.

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self.start_checker()

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

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self.disable_initiator_tag = (gobject.timeout_add

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(self.timeout_milliseconds(),

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self.disable))

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self.enabled = True

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# Also start a new checker *right now*.

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self.start_checker()

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def disable(self, quiet=True):

332

def disable(self):

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"""Disable this client."""

403

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

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return False

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if not quiet:

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self.send_changedstate()

407

if not quiet:

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

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

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

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

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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

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

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = None

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self.stop_checker()

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if os.WIFEXITED(condition):

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exitstatus = os.WEXITSTATUS(condition)

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360

if exitstatus == 0:

433

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

361

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

434

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vars(self))

435

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self.checked_ok()

436

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else:

437

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

365

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

438

366

vars(self))

439

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else:

440

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

368

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

441

369

vars(self))

442

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443

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def checked_ok(self):

452

380

(self.timeout_milliseconds(),

453

381

self.disable))

454

382

455

def need_approval(self):

456

self.last_approval_request = datetime.datetime.utcnow()

457

458

383

def start_checker(self):

459

384

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

460

385

466

391

# client would inevitably timeout, since no checker would get

467

392

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

468

393

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

469

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

470

# should be.

394

# than 'timeout' for the client to be declared invalid, which

395

# is as it should be.

471

396

472

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

473

try:

398

if self.checker is not None:

474

399

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

475

except (AttributeError, OSError) as error:

476

if (isinstance(error, OSError)

477

and error.errno != errno.ECHILD):

478

raise error

479

else:

480

400

if pid:

481

logger.warning("Checker was a zombie")

401

logger.warning(u"Checker was a zombie")

482

402

gobject.source_remove(self.checker_callback_tag)

483

403

self.checker_callback(pid, status,

484

404

self.current_checker_command)

489

409

command = self.checker_command % self.host

490

410

except TypeError:

491

411

# Escape attributes for the shell

492

escaped_attrs = dict(

493

(attr,

494

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

495

errors=

496

'replace')))

497

for attr in

498

self.runtime_expansions)

499

412

escaped_attrs = dict((key,

413

re.escape(unicode(str(val),

414

errors=

415

u'replace')))

416

for key, val in

417

vars(self).iteritems())

500

418

try:

501

419

command = self.checker_command % escaped_attrs

502

except TypeError as error:

503

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

504

' %s', self.checker_command, error)

420

except TypeError, error:

421

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

422

u' %s', self.checker_command, error)

505

423

return True # Try again later

506

424

self.current_checker_command = command

507

425

try:

508

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

426

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

509

427

command, self.name)

510

428

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

511

429

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

513

431

# always replaced by /dev/null.)

514

432

self.checker = subprocess.Popen(command,

515

433

close_fds=True,

516

shell=True, cwd="/")

434

shell=True, cwd=u"/")

517

435

self.checker_callback_tag = (gobject.child_watch_add

518

436

(self.checker.pid,

519

437

self.checker_callback,

524

442

if pid:

525

443

gobject.source_remove(self.checker_callback_tag)

526

444

self.checker_callback(pid, status, command)

527

except OSError as error:

528

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

445

except OSError, error:

446

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

529

447

error)

530

448

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

531

449

return True

535

453

if self.checker_callback_tag:

536

454

gobject.source_remove(self.checker_callback_tag)

537

455

self.checker_callback_tag = None

538

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

456

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

539

457

return

540

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

458

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

541

459

try:

542

460

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

543

#time.sleep(0.5)

461

#os.sleep(0.5)

544

462

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

545

463

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

546

except OSError as error:

464

except OSError, error:

547

465

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

548

466

raise

549

467

self.checker = None

550

551

def dbus_service_property(dbus_interface, signature="v",

552

access="readwrite", byte_arrays=False):

553

"""Decorators for marking methods of a DBusObjectWithProperties to

554

become properties on the D-Bus.

555

556

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

557

and with one argument by "Set".

558

559

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

560

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

561

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

562

"""

563

# Encoding deeply encoded byte arrays is not supported yet by the

564

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

565

if byte_arrays and signature != "ay":

566

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

567

" signature %r" % signature)

568

def decorator(func):

569

func._dbus_is_property = True

570

func._dbus_interface = dbus_interface

571

func._dbus_signature = signature

572

func._dbus_access = access

573

func._dbus_name = func.__name__

574

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

575

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

576

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

577

return func

578

return decorator

579

580

581

class DBusPropertyException(dbus.exceptions.DBusException):

582

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

583

"""

584

def __unicode__(self):

585

return unicode(str(self))

586

587

588

class DBusPropertyAccessException(DBusPropertyException):

589

"""A property's access permissions disallows an operation.

590

"""

591

pass

592

593

594

class DBusPropertyNotFound(DBusPropertyException):

595

"""An attempt was made to access a non-existing property.

596

"""

597

pass

598

599

600

class DBusObjectWithProperties(dbus.service.Object):

601

"""A D-Bus object with properties.

602

603

Classes inheriting from this can use the dbus_service_property

604

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

605

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

606

"""

607

608

@staticmethod

609

def _is_dbus_property(obj):

610

return getattr(obj, "_dbus_is_property", False)

611

612

def _get_all_dbus_properties(self):

613

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

614

"""

615

return ((prop._dbus_name, prop)

616

for name, prop in

617

inspect.getmembers(self, self._is_dbus_property))

618

619

def _get_dbus_property(self, interface_name, property_name):

620

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

621

property with the specified name and interface.

622

"""

623

for name in (property_name,

624

property_name + "_dbus_property"):

625

prop = getattr(self, name, None)

626

if (prop is None

627

or not self._is_dbus_property(prop)

628

or prop._dbus_name != property_name

629

or (interface_name and prop._dbus_interface

630

and interface_name != prop._dbus_interface)):

631

continue

632

return prop

633

# No such property

634

raise DBusPropertyNotFound(self.dbus_object_path + ":"

635

+ interface_name + "."

636

+ property_name)

637

638

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

639

out_signature="v")

640

def Get(self, interface_name, property_name):

641

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

642

"""

643

prop = self._get_dbus_property(interface_name, property_name)

644

if prop._dbus_access == "write":

645

raise DBusPropertyAccessException(property_name)

646

value = prop()

647

if not hasattr(value, "variant_level"):

648

return value

649

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

650

651

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

652

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

653

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

654

"""

655

prop = self._get_dbus_property(interface_name, property_name)

656

if prop._dbus_access == "read":

657

raise DBusPropertyAccessException(property_name)

658

if prop._dbus_get_args_options["byte_arrays"]:

659

# The byte_arrays option is not supported yet on

660

# signatures other than "ay".

661

if prop._dbus_signature != "ay":

662

raise ValueError

663

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

664

for byte in value))

665

prop(value)

666

667

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

668

out_signature="a{sv}")

669

def GetAll(self, interface_name):

670

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

671

standard.

672

673

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

674

"""

675

all = {}

676

for name, prop in self._get_all_dbus_properties():

677

if (interface_name

678

and interface_name != prop._dbus_interface):

679

# Interface non-empty but did not match

680

continue

681

# Ignore write-only properties

682

if prop._dbus_access == "write":

683

continue

684

value = prop()

685

if not hasattr(value, "variant_level"):

686

all[name] = value

687

continue

688

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

689

value.variant_level+1)

690

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

691

692

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

693

out_signature="s",

694

path_keyword='object_path',

695

connection_keyword='connection')

696

def Introspect(self, object_path, connection):

697

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

698

"""

699

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

700

connection)

701

try:

702

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

703

def make_tag(document, name, prop):

704

e = document.createElement("property")

705

e.setAttribute("name", name)

706

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

707

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

708

return e

709

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

710

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

711

for name, prop

712

in self._get_all_dbus_properties()

713

if prop._dbus_interface

714

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

715

if_tag.appendChild(tag)

716

# Add the names to the return values for the

717

# "org.freedesktop.DBus.Properties" methods

718

if (if_tag.getAttribute("name")

719

== "org.freedesktop.DBus.Properties"):

720

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

721

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

722

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

723

if (arg.getAttribute("direction")

724

== "out"):

725

arg.setAttribute("name", "value")

726

elif cn.getAttribute("name") == "GetAll":

727

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

728

if (arg.getAttribute("direction")

729

== "out"):

730

arg.setAttribute("name", "props")

731

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

732

document.unlink()

733

except (AttributeError, xml.dom.DOMException,

734

xml.parsers.expat.ExpatError) as error:

735

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

736

error)

737

return xmlstring

738

739

740

class ClientDBus(Client, DBusObjectWithProperties):

468

469

def still_valid(self):

470

"""Has the timeout not yet passed for this client?"""

471

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

472

return False

473

now = datetime.datetime.utcnow()

474

if self.last_checked_ok is None:

475

return now < (self.created + self.timeout)

476

else:

477

return now < (self.last_checked_ok + self.timeout)

478

479

480

class ClientDBus(Client, dbus.service.Object):

741

481

"""A Client class using D-Bus

742

482

743

483

Attributes:

744

484

dbus_object_path: dbus.ObjectPath

745

485

bus: dbus.SystemBus()

746

486

"""

747

748

runtime_expansions = (Client.runtime_expansions

749

+ ("dbus_object_path",))

750

751

487

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

752

488

753

489

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

754

self._approvals_pending = 0

755

490

self.bus = bus

756

491

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

757

492

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

758

493

# the D-Bus

759

client_object_name = unicode(self.name).translate(

760

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

761

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

762

494

self.dbus_object_path = (dbus.ObjectPath

763

("/clients/" + client_object_name))

764

DBusObjectWithProperties.__init__(self, self.bus,

765

self.dbus_object_path)

766

767

def _get_approvals_pending(self):

768

return self._approvals_pending

769

def _set_approvals_pending(self, value):

770

old_value = self._approvals_pending

771

self._approvals_pending = value

772

bval = bool(value)

773

if (hasattr(self, "dbus_object_path")

774

and bval is not bool(old_value)):

775

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

776

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

777

dbus_bool)

778

779

approvals_pending = property(_get_approvals_pending,

780

_set_approvals_pending)

781

del _get_approvals_pending, _set_approvals_pending

495

(u"/clients/"

496

+ self.name.replace(u".", u"_")))

497

dbus.service.Object.__init__(self, self.bus,

498

self.dbus_object_path)

782

499

783

500

@staticmethod

784

501

def _datetime_to_dbus(dt, variant_level=0):

787

504

variant_level=variant_level)

788

505

789

506

def enable(self):

790

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

507

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

791

508

r = Client.enable(self)

792

509

if oldstate != self.enabled:

793

510

# Emit D-Bus signals

794

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

511

self.PropertyChanged(dbus.String(u"enabled"),

795

512

dbus.Boolean(True, variant_level=1))

796

513

self.PropertyChanged(

797

dbus.String("LastEnabled"),

514

dbus.String(u"last_enabled"),

798

515

self._datetime_to_dbus(self.last_enabled,

799

516

variant_level=1))

800

517

return r

801

518

802

def disable(self, quiet = False):

803

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

804

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

805

if not quiet and oldstate != self.enabled:

519

def disable(self, signal = True):

520

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

521

r = Client.disable(self)

522

if signal and oldstate != self.enabled:

806

523

# Emit D-Bus signal

807

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

524

self.PropertyChanged(dbus.String(u"enabled"),

808

525

dbus.Boolean(False, variant_level=1))

809

526

return r

810

527

813

530

self.remove_from_connection()

814

531

except LookupError:

815

532

pass

816

if hasattr(DBusObjectWithProperties, "__del__"):

817

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

533

if hasattr(dbus.service.Object, u"__del__"):

534

dbus.service.Object.__del__(self, *args, **kwargs)

818

535

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

819

536

820

537

def checker_callback(self, pid, condition, command,

822

539

self.checker_callback_tag = None

823

540

self.checker = None

824

541

# Emit D-Bus signal

825

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

542

self.PropertyChanged(dbus.String(u"checker_running"),

826

543

dbus.Boolean(False, variant_level=1))

827

544

if os.WIFEXITED(condition):

828

545

exitstatus = os.WEXITSTATUS(condition)

840

557

*args, **kwargs)

841

558

842

559

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

843

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

560

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

844

561

# Emit D-Bus signal

845

562

self.PropertyChanged(

846

dbus.String("LastCheckedOK"),

563

dbus.String(u"last_checked_ok"),

847

564

(self._datetime_to_dbus(self.last_checked_ok,

848

565

variant_level=1)))

849

850

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

851

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

852

# Emit D-Bus signal

853

self.PropertyChanged(

854

dbus.String("LastApprovalRequest"),

855

(self._datetime_to_dbus(self.last_approval_request,

856

variant_level=1)))

857

566

return r

858

567

859

568

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

869

578

# Emit D-Bus signal

870

579

self.CheckerStarted(self.current_checker_command)

871

580

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

581

dbus.String(u"checker_running"),

873

582

dbus.Boolean(True, variant_level=1))

874

583

return r

875

584

876

585

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

877

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

586

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

878

587

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

879

588

if (old_checker is not None

880

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

881

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

589

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

590

self.PropertyChanged(dbus.String(u"checker_running"),

882

591

dbus.Boolean(False, variant_level=1))

883

592

return r

884

885

def _reset_approved(self):

886

self._approved = None

887

return False

888

889

def approve(self, value=True):

890

self.send_changedstate()

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

893

(self.approval_duration),

894

self._reset_approved)

895

896

897

## D-Bus methods, signals & properties

898

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

899

900

## Signals

593

594

## D-Bus methods & signals

595

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

596

597

# CheckedOK - method

598

@dbus.service.method(_interface)

599

def CheckedOK(self):

600

return self.checked_ok()

901

601

902

602

# CheckerCompleted - signal

903

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

603

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

904

604

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

905

605

"D-Bus signal"

906

606

pass

907

607

908

608

# CheckerStarted - signal

909

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

609

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

910

610

def CheckerStarted(self, command):

911

611

"D-Bus signal"

912

612

pass

913

613

614

# GetAllProperties - method

615

@dbus.service.method(_interface, out_signature=u"a{sv}")

616

def GetAllProperties(self):

617

"D-Bus method"

618

return dbus.Dictionary({

619

dbus.String(u"name"):

620

dbus.String(self.name, variant_level=1),

621

dbus.String(u"fingerprint"):

622

dbus.String(self.fingerprint, variant_level=1),

623

dbus.String(u"host"):

624

dbus.String(self.host, variant_level=1),

625

dbus.String(u"created"):

626

self._datetime_to_dbus(self.created,

627

variant_level=1),

628

dbus.String(u"last_enabled"):

629

(self._datetime_to_dbus(self.last_enabled,

630

variant_level=1)

631

if self.last_enabled is not None

632

else dbus.Boolean(False, variant_level=1)),

633

dbus.String(u"enabled"):

634

dbus.Boolean(self.enabled, variant_level=1),

635

dbus.String(u"last_checked_ok"):

636

(self._datetime_to_dbus(self.last_checked_ok,

637

variant_level=1)

638

if self.last_checked_ok is not None

639

else dbus.Boolean (False, variant_level=1)),

640

dbus.String(u"timeout"):

641

dbus.UInt64(self.timeout_milliseconds(),

642

variant_level=1),

643

dbus.String(u"interval"):

644

dbus.UInt64(self.interval_milliseconds(),

645

variant_level=1),

646

dbus.String(u"checker"):

647

dbus.String(self.checker_command,

648

variant_level=1),

649

dbus.String(u"checker_running"):

650

dbus.Boolean(self.checker is not None,

651

variant_level=1),

652

dbus.String(u"object_path"):

653

dbus.ObjectPath(self.dbus_object_path,

654

variant_level=1)

655

}, signature=u"sv")

656

657

# IsStillValid - method

658

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

659

def IsStillValid(self):

660

return self.still_valid()

661

914

662

# PropertyChanged - signal

915

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

663

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

916

664

def PropertyChanged(self, property, value):

917

665

"D-Bus signal"

918

666

pass

919

667

920

# GotSecret - signal

668

# ReceivedSecret - signal

921

669

@dbus.service.signal(_interface)

922

def GotSecret(self):

923

"""D-Bus signal

924

Is sent after a successful transfer of secret from the Mandos

925

server to mandos-client

926

"""

670

def ReceivedSecret(self):

671

"D-Bus signal"

927

672

pass

928

673

929

674

# Rejected - signal

930

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

931

def Rejected(self, reason):

675

@dbus.service.signal(_interface)

676

def Rejected(self):

932

677

"D-Bus signal"

933

678

pass

934

679

935

# NeedApproval - signal

936

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

937

def NeedApproval(self, timeout, default):

938

"D-Bus signal"

939

return self.need_approval()

940

941

## Methods

942

943

# Approve - method

944

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

945

def Approve(self, value):

946

self.approve(value)

947

948

# CheckedOK - method

949

@dbus.service.method(_interface)

950

def CheckedOK(self):

951

self.checked_ok()

680

# SetChecker - method

681

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

682

def SetChecker(self, checker):

683

"D-Bus setter method"

684

self.checker_command = checker

685

# Emit D-Bus signal

686

self.PropertyChanged(dbus.String(u"checker"),

687

dbus.String(self.checker_command,

688

variant_level=1))

689

690

# SetHost - method

691

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

692

def SetHost(self, host):

693

"D-Bus setter method"

694

self.host = host

695

# Emit D-Bus signal

696

self.PropertyChanged(dbus.String(u"host"),

697

dbus.String(self.host, variant_level=1))

698

699

# SetInterval - method

700

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

701

def SetInterval(self, milliseconds):

702

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

703

# Emit D-Bus signal

704

self.PropertyChanged(dbus.String(u"interval"),

705

(dbus.UInt64(self.interval_milliseconds(),

706

variant_level=1)))

707

708

# SetSecret - method

709

@dbus.service.method(_interface, in_signature=u"ay",

710

byte_arrays=True)

711

def SetSecret(self, secret):

712

"D-Bus setter method"

713

self.secret = str(secret)

714

715

# SetTimeout - method

716

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

717

def SetTimeout(self, milliseconds):

718

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

719

# Emit D-Bus signal

720

self.PropertyChanged(dbus.String(u"timeout"),

721

(dbus.UInt64(self.timeout_milliseconds(),

722

variant_level=1)))

952

723

953

724

# Enable - method

954

725

@dbus.service.method(_interface)

973

744

def StopChecker(self):

974

745

self.stop_checker()

975

746

976

## Properties

977

978

# ApprovalPending - property

979

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

980

def ApprovalPending_dbus_property(self):

981

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

982

983

# ApprovedByDefault - property

984

@dbus_service_property(_interface, signature="b",

985

access="readwrite")

986

def ApprovedByDefault_dbus_property(self, value=None):

987

if value is None: # get

988

return dbus.Boolean(self.approved_by_default)

989

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

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

992

dbus.Boolean(value, variant_level=1))

993

994

# ApprovalDelay - property

995

@dbus_service_property(_interface, signature="t",

996

access="readwrite")

997

def ApprovalDelay_dbus_property(self, value=None):

998

if value is None: # get

999

return dbus.UInt64(self.approval_delay_milliseconds())

1000

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

1001

# Emit D-Bus signal

1002

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

1003

dbus.UInt64(value, variant_level=1))

1004

1005

# ApprovalDuration - property

1006

@dbus_service_property(_interface, signature="t",

1007

access="readwrite")

1008

def ApprovalDuration_dbus_property(self, value=None):

1009

if value is None: # get

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1011

self.approval_duration))

1012

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

1013

# Emit D-Bus signal

1014

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

1015

dbus.UInt64(value, variant_level=1))

1016

1017

# Name - property

1018

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

1019

def Name_dbus_property(self):

1020

return dbus.String(self.name)

1021

1022

# Fingerprint - property

1023

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

1024

def Fingerprint_dbus_property(self):

1025

return dbus.String(self.fingerprint)

1026

1027

# Host - property

1028

@dbus_service_property(_interface, signature="s",

1029

access="readwrite")

1030

def Host_dbus_property(self, value=None):

1031

if value is None: # get

1032

return dbus.String(self.host)

1033

self.host = value

1034

# Emit D-Bus signal

1035

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

1036

dbus.String(value, variant_level=1))

1037

1038

# Created - property

1039

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

1040

def Created_dbus_property(self):

1041

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

1042

1043

# LastEnabled - property

1044

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

1045

def LastEnabled_dbus_property(self):

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

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

1049

1050

# Enabled - property

1051

@dbus_service_property(_interface, signature="b",

1052

access="readwrite")

1053

def Enabled_dbus_property(self, value=None):

1054

if value is None: # get

1055

return dbus.Boolean(self.enabled)

1056

if value:

1057

self.enable()

1058

else:

1059

self.disable()

1060

1061

# LastCheckedOK - property

1062

@dbus_service_property(_interface, signature="s",

1063

access="readwrite")

1064

def LastCheckedOK_dbus_property(self, value=None):

1065

if value is not None:

1066

self.checked_ok()

1067

return

1068

if self.last_checked_ok is None:

1069

return dbus.String("")

1070

return dbus.String(self._datetime_to_dbus(self

1071

.last_checked_ok))

1072

1073

# LastApprovalRequest - property

1074

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

1075

def LastApprovalRequest_dbus_property(self):

1076

if self.last_approval_request is None:

1077

return dbus.String("")

1078

return dbus.String(self.

1079

_datetime_to_dbus(self

1080

.last_approval_request))

1081

1082

# Timeout - property

1083

@dbus_service_property(_interface, signature="t",

1084

access="readwrite")

1085

def Timeout_dbus_property(self, value=None):

1086

if value is None: # get

1087

return dbus.UInt64(self.timeout_milliseconds())

1088

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

1089

# Emit D-Bus signal

1090

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

1091

dbus.UInt64(value, variant_level=1))

1092

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

1093

return

1094

# Reschedule timeout

1095

gobject.source_remove(self.disable_initiator_tag)

1096

self.disable_initiator_tag = None

1097

time_to_die = (self.

1098

_timedelta_to_milliseconds((self

1099

.last_checked_ok

1100

+ self.timeout)

1101

- datetime.datetime

1102

.utcnow()))

1103

if time_to_die <= 0:

1104

# The timeout has passed

1105

self.disable()

1106

else:

1107

self.disable_initiator_tag = (gobject.timeout_add

1108

(time_to_die, self.disable))

1109

1110

# Interval - property

1111

@dbus_service_property(_interface, signature="t",

1112

access="readwrite")

1113

def Interval_dbus_property(self, value=None):

1114

if value is None: # get

1115

return dbus.UInt64(self.interval_milliseconds())

1116

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

1117

# Emit D-Bus signal

1118

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

1119

dbus.UInt64(value, variant_level=1))

1120

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

1121

return

1122

# Reschedule checker run

1123

gobject.source_remove(self.checker_initiator_tag)

1124

self.checker_initiator_tag = (gobject.timeout_add

1125

(value, self.start_checker))

1126

self.start_checker() # Start one now, too

1127

1128

# Checker - property

1129

@dbus_service_property(_interface, signature="s",

1130

access="readwrite")

1131

def Checker_dbus_property(self, value=None):

1132

if value is None: # get

1133

return dbus.String(self.checker_command)

1134

self.checker_command = value

1135

# Emit D-Bus signal

1136

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

1137

dbus.String(self.checker_command,

1138

variant_level=1))

1139

1140

# CheckerRunning - property

1141

@dbus_service_property(_interface, signature="b",

1142

access="readwrite")

1143

def CheckerRunning_dbus_property(self, value=None):

1144

if value is None: # get

1145

return dbus.Boolean(self.checker is not None)

1146

if value:

1147

self.start_checker()

1148

else:

1149

self.stop_checker()

1150

1151

# ObjectPath - property

1152

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

1153

def ObjectPath_dbus_property(self):

1154

return self.dbus_object_path # is already a dbus.ObjectPath

1155

1156

# Secret = property

1157

@dbus_service_property(_interface, signature="ay",

1158

access="write", byte_arrays=True)

1159

def Secret_dbus_property(self, value):

1160

self.secret = str(value)

1161

1162

747

del _interface

1163

748

1164

749

1165

class ProxyClient(object):

1166

def __init__(self, child_pipe, fpr, address):

1167

self._pipe = child_pipe

1168

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

1169

if not self._pipe.recv():

1170

raise KeyError()

1171

1172

def __getattribute__(self, name):

1173

if(name == '_pipe'):

1174

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

1175

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

1176

data = self._pipe.recv()

1177

if data[0] == 'data':

1178

return data[1]

1179

if data[0] == 'function':

1180

def func(*args, **kwargs):

1181

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

1182

return self._pipe.recv()[1]

1183

return func

1184

1185

def __setattr__(self, name, value):

1186

if(name == '_pipe'):

1187

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

1188

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

1189

1190

1191

750

class ClientHandler(socketserver.BaseRequestHandler, object):

1192

751

"""A class to handle client connections.

1193

752

1195

754

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

1196

755

1197

756

def handle(self):

1198

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

1199

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

1200

unicode(self.client_address))

1201

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

1202

self.server.child_pipe.fileno())

1203

757

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

758

unicode(self.client_address))

759

logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])

760

# Open IPC pipe to parent process

761

with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:

1204

762

session = (gnutls.connection

1205

763

.ClientSession(self.request,

1206

764

gnutls.connection

1207

765

.X509Credentials()))

1208

766

767

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

768

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

769

try:

770

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

771

raise RuntimeError

772

except (ValueError, IndexError, RuntimeError), error:

773

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

774

return

775

1209

776

# Note: gnutls.connection.X509Credentials is really a

1210

777

# generic GnuTLS certificate credentials object so long as

1211

778

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

1212

779

# here despite using OpenPGP certificates.

1213

1214

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

1215

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

1216

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

1217

# "+DHE-DSS"))

780

781

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

782

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

783

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

784

# u"+DHE-DSS"))

1218

785

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

1219

786

priority = self.server.gnutls_priority

1220

787

if priority is None:

1221

priority = "NORMAL"

788

priority = u"NORMAL"

1222

789

(gnutls.library.functions

1223

790

.gnutls_priority_set_direct(session._c_object,

1224

791

priority, None))

1225

1226

# Start communication using the Mandos protocol

1227

# Get protocol number

1228

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

1229

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

1230

try:

1231

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

1232

raise RuntimeError

1233

except (ValueError, IndexError, RuntimeError) as error:

1234

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

1235

return

1236

1237

# Start GnuTLS connection

792

1238

793

try:

1239

794

session.handshake()

1240

except gnutls.errors.GNUTLSError as error:

1241

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

795

except gnutls.errors.GNUTLSError, error:

796

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

1242

797

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

1243

798

# established. Just abandon the request.

1244

799

return

1245

logger.debug("Handshake succeeded")

1246

1247

approval_required = False

800

logger.debug(u"Handshake succeeded")

1248

801

try:

1249

try:

1250

fpr = self.fingerprint(self.peer_certificate

1251

(session))

1252

except (TypeError,

1253

gnutls.errors.GNUTLSError) as error:

1254

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

1255

return

1256

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

1257

1258

try:

1259

client = ProxyClient(child_pipe, fpr,

1260

self.client_address)

1261

except KeyError:

1262

return

1263

1264

if client.approval_delay:

1265

delay = client.approval_delay

1266

client.approvals_pending += 1

1267

approval_required = True

1268

1269

while True:

1270

if not client.enabled:

1271

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

1272

client.name)

1273

if self.server.use_dbus:

1274

# Emit D-Bus signal

1275

client.Rejected("Disabled")

1276

return

1277

1278

if client._approved or not client.approval_delay:

1279

#We are approved or approval is disabled

1280

break

1281

elif client._approved is None:

1282

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

1283

client.name)

1284

if self.server.use_dbus:

1285

# Emit D-Bus signal

1286

client.NeedApproval(

1287

client.approval_delay_milliseconds(),

1288

client.approved_by_default)

1289

else:

1290

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

1291

client.name)

1292

if self.server.use_dbus:

1293

# Emit D-Bus signal

1294

client.Rejected("Denied")

1295

return

1296

1297

#wait until timeout or approved

1298

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

1299

time = datetime.datetime.now()

1300

client.changedstate.acquire()

1301

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

1302

client.changedstate.release()

1303

time2 = datetime.datetime.now()

1304

if (time2 - time) >= delay:

1305

if not client.approved_by_default:

1306

logger.warning("Client %s timed out while"

1307

" waiting for approval",

1308

client.name)

1309

if self.server.use_dbus:

1310

# Emit D-Bus signal

1311

client.Rejected("Approval timed out")

1312

return

1313

else:

1314

break

1315

else:

1316

delay -= time2 - time

1317

1318

sent_size = 0

1319

while sent_size < len(client.secret):

1320

try:

1321

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

1322

except gnutls.errors.GNUTLSError as error:

1323

logger.warning("gnutls send failed")

1324

return

1325

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

1326

sent, len(client.secret)

1327

- (sent_size + sent))

1328

sent_size += sent

1329

1330

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

1331

# bump the timeout as if seen

1332

client.checked_ok()

1333

if self.server.use_dbus:

1334

# Emit D-Bus signal

1335

client.GotSecret()

802

fpr = self.fingerprint(self.peer_certificate(session))

803

except (TypeError, gnutls.errors.GNUTLSError), error:

804

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

805

session.bye()

806

return

807

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

1336

808

1337

finally:

1338

if approval_required:

1339

client.approvals_pending -= 1

1340

try:

1341

session.bye()

1342

except gnutls.errors.GNUTLSError as error:

1343

logger.warning("GnuTLS bye failed")

809

for c in self.server.clients:

810

if c.fingerprint == fpr:

811

client = c

812

break

813

else:

814

ipc.write(u"NOTFOUND %s %s\n"

815

% (fpr, unicode(self.client_address)))

816

session.bye()

817

return

818

# Have to check if client.still_valid(), since it is

819

# possible that the client timed out while establishing

820

# the GnuTLS session.

821

if not client.still_valid():

822

ipc.write(u"INVALID %s\n" % client.name)

823

session.bye()

824

return

825

ipc.write(u"SENDING %s\n" % client.name)

826

sent_size = 0

827

while sent_size < len(client.secret):

828

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

829

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

830

sent, len(client.secret)

831

- (sent_size + sent))

832

sent_size += sent

833

session.bye()

1344

834

1345

835

@staticmethod

1346

836

def peer_certificate(session):

1356

846

.gnutls_certificate_get_peers

1357

847

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

1358

848

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

1359

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

1360

" certificate")

849

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

850

u" certificate")

1361

851

if list_size.value == 0:

1362

852

return None

1363

853

cert = cert_list[0]

1389

879

if crtverify.value != 0:

1390

880

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1391

881

raise (gnutls.errors.CertificateSecurityError

1392

("Verify failed"))

882

(u"Verify failed"))

1393

883

# New buffer for the fingerprint

1394

884

buf = ctypes.create_string_buffer(20)

1395

885

buf_len = ctypes.c_size_t()

1402

892

# Convert the buffer to a Python bytestring

1403

893

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

1404

894

# Convert the bytestring to hexadecimal notation

1405

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

895

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

1406

896

return hex_fpr

1407

897

1408

898

1409

class MultiprocessingMixIn(object):

1410

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

1411

def sub_process_main(self, request, address):

1412

try:

1413

self.finish_request(request, address)

1414

except:

1415

self.handle_error(request, address)

1416

self.close_request(request)

1417

1418

def process_request(self, request, address):

1419

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

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

1422

1423

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1424

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

899

class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):

900

"""Like socketserver.ForkingMixIn, but also pass a pipe."""

1425

901

def process_request(self, request, client_address):

1426

902

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

1427

903

1428

904

This function creates a new pipe in self.pipe

1429

905

"""

1430

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1431

1432

super(MultiprocessingMixInWithPipe,

906

self.pipe = os.pipe()

907

super(ForkingMixInWithPipe,

1433

908

self).process_request(request, client_address)

1434

self.child_pipe.close()

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

909

os.close(self.pipe[1]) # close write end

910

self.add_pipe(self.pipe[0])

911

def add_pipe(self, pipe):

1438

912

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

1439

raise NotImplementedError

1440

1441

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

913

os.close(pipe)

914

915

916

class IPv6_TCPServer(ForkingMixInWithPipe,

1442

917

socketserver.TCPServer, object):

1443

918

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

1444

919

1460

935

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

1461

936

if self.interface is not None:

1462

937

if SO_BINDTODEVICE is None:

1463

logger.error("SO_BINDTODEVICE does not exist;"

1464

" cannot bind to interface %s",

938

logger.error(u"SO_BINDTODEVICE does not exist;"

939

u" cannot bind to interface %s",

1465

940

self.interface)

1466

941

else:

1467

942

try:

1468

943

self.socket.setsockopt(socket.SOL_SOCKET,

1469

944

SO_BINDTODEVICE,

1470

945

str(self.interface

1471

+ '\0'))

1472

except socket.error as error:

946

+ u'\0'))

947

except socket.error, error:

1473

948

if error[0] == errno.EPERM:

1474

logger.error("No permission to"

1475

" bind to interface %s",

949

logger.error(u"No permission to"

950

u" bind to interface %s",

1476

951

self.interface)

1477

952

elif error[0] == errno.ENOPROTOOPT:

1478

logger.error("SO_BINDTODEVICE not available;"

1479

" cannot bind to interface %s",

953

logger.error(u"SO_BINDTODEVICE not available;"

954

u" cannot bind to interface %s",

1480

955

self.interface)

1481

956

else:

1482

957

raise

1484

959

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

1485

960

if not self.server_address[0]:

1486

961

if self.address_family == socket.AF_INET6:

1487

any_address = "::" # in6addr_any

962

any_address = u"::" # in6addr_any

1488

963

else:

1489

964

any_address = socket.INADDR_ANY

1490

965

self.server_address = (any_address,

1529

1004

return socketserver.TCPServer.server_activate(self)

1530

1005

def enable(self):

1531

1006

self.enabled = True

1532

def add_pipe(self, parent_pipe):

1007

def add_pipe(self, pipe):

1533

1008

# Call "handle_ipc" for both data and EOF events

1534

gobject.io_add_watch(parent_pipe.fileno(),

1535

gobject.IO_IN | gobject.IO_HUP,

1536

functools.partial(self.handle_ipc,

1537

parent_pipe = parent_pipe))

1538

1539

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

1540

client_object=None):

1009

gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,

1010

self.handle_ipc)

1011

def handle_ipc(self, source, condition, file_objects={}):

1541

1012

condition_names = {

1542

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

1543

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

1013

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

1014

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

1544

1015

# blocking).

1545

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

1546

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

1547

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

1016

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

1017

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

1018

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

1548

1019

# broken, usually for pipes and

1549

1020

# sockets).

1550

1021

}

1552

1023

for cond, name in

1553

1024

condition_names.iteritems()

1554

1025

if cond & condition)

1555

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

1556

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

1557

return False

1558

1559

# Read a request from the child

1560

request = parent_pipe.recv()

1561

command = request[0]

1562

1563

if command == 'init':

1564

fpr = request[1]

1565

address = request[2]

1566

1567

for c in self.clients:

1568

if c.fingerprint == fpr:

1569

client = c

1570

break

1571

else:

1572

logger.info("Client not found for fingerprint: %s, ad"

1573

"dress: %s", fpr, address)

1574

if self.use_dbus:

1575

# Emit D-Bus signal

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

1577

parent_pipe.send(False)

1578

return False

1579

1580

gobject.io_add_watch(parent_pipe.fileno(),

1581

gobject.IO_IN | gobject.IO_HUP,

1582

functools.partial(self.handle_ipc,

1583

parent_pipe = parent_pipe,

1584

client_object = client))

1585

parent_pipe.send(True)

1586

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

1587

return False

1588

if command == 'funcall':

1589

funcname = request[1]

1590

args = request[2]

1591

kwargs = request[3]

1592

1593

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

1594

1595

if command == 'getattr':

1596

attrname = request[1]

1597

if callable(client_object.__getattribute__(attrname)):

1598

parent_pipe.send(('function',))

1599

else:

1600

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

1601

1602

if command == 'setattr':

1603

attrname = request[1]

1604

value = request[2]

1605

setattr(client_object, attrname, value)

1606

1026

logger.debug(u"Handling IPC: FD = %d, condition = %s", source,

1027

conditions_string)

1028

1029

# Turn the pipe file descriptor into a Python file object

1030

if source not in file_objects:

1031

file_objects[source] = os.fdopen(source, u"r", 1)

1032

1033

# Read a line from the file object

1034

cmdline = file_objects[source].readline()

1035

if not cmdline: # Empty line means end of file

1036

# close the IPC pipe

1037

file_objects[source].close()

1038

del file_objects[source]

1039

1040

# Stop calling this function

1041

return False

1042

1043

logger.debug(u"IPC command: %r", cmdline)

1044

1045

# Parse and act on command

1046

cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)

1047

1048

if cmd == u"NOTFOUND":

1049

logger.warning(u"Client not found for fingerprint: %s",

1050

args)

1051

if self.use_dbus:

1052

# Emit D-Bus signal

1053

mandos_dbus_service.ClientNotFound(args)

1054

elif cmd == u"INVALID":

1055

for client in self.clients:

1056

if client.name == args:

1057

logger.warning(u"Client %s is invalid", args)

1058

if self.use_dbus:

1059

# Emit D-Bus signal

1060

client.Rejected()

1061

break

1062

else:

1063

logger.error(u"Unknown client %s is invalid", args)

1064

elif cmd == u"SENDING":

1065

for client in self.clients:

1066

if client.name == args:

1067

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

1068

client.checked_ok()

1069

if self.use_dbus:

1070

# Emit D-Bus signal

1071

client.ReceivedSecret()

1072

break

1073

else:

1074

logger.error(u"Sending secret to unknown client %s",

1075

args)

1076

else:

1077

logger.error(u"Unknown IPC command: %r", cmdline)

1078

1079

# Keep calling this function

1607

1080

return True

1608

1081

1609

1082

1610

1083

def string_to_delta(interval):

1611

1084

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

1612

1085

1613

>>> string_to_delta('7d')

1086

>>> string_to_delta(u'7d')

1614

1087

datetime.timedelta(7)

1615

>>> string_to_delta('60s')

1088

>>> string_to_delta(u'60s')

1616

1089

datetime.timedelta(0, 60)

1617

>>> string_to_delta('60m')

1090

>>> string_to_delta(u'60m')

1618

1091

datetime.timedelta(0, 3600)

1619

>>> string_to_delta('24h')

1092

>>> string_to_delta(u'24h')

1620

1093

datetime.timedelta(1)

1621

>>> string_to_delta('1w')

1094

>>> string_to_delta(u'1w')

1622

1095

datetime.timedelta(7)

1623

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

1096

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

1624

1097

datetime.timedelta(0, 330)

1625

1098

"""

1626

1099

timevalue = datetime.timedelta(0)

1628

1101

try:

1629

1102

suffix = unicode(s[-1])

1630

1103

value = int(s[:-1])

1631

if suffix == "d":

1104

if suffix == u"d":

1632

1105

delta = datetime.timedelta(value)

1633

elif suffix == "s":

1106

elif suffix == u"s":

1634

1107

delta = datetime.timedelta(0, value)

1635

elif suffix == "m":

1108

elif suffix == u"m":

1636

1109

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

1637

elif suffix == "h":

1110

elif suffix == u"h":

1638

1111

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

1639

elif suffix == "w":

1112

elif suffix == u"w":

1640

1113

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

1641

1114

else:

1642

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

1643

except (ValueError, IndexError) as e:

1644

raise ValueError(*(e.args))

1115

raise ValueError

1116

except (ValueError, IndexError):

1117

raise ValueError

1645

1118

timevalue += delta

1646

1119

return timevalue

1647

1120

1653

1126

global if_nametoindex

1654

1127

try:

1655

1128

if_nametoindex = (ctypes.cdll.LoadLibrary

1656

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

1129

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

1657

1130

.if_nametoindex)

1658

1131

except (OSError, AttributeError):

1659

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

1132

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

1660

1133

def if_nametoindex(interface):

1661

1134

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

1662

1135

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

1663

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

1136

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

1664

1137

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1665

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

1138

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

1666

1139

interface))

1667

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

1140

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

1668

1141

ifreq[16:20])[0]

1669

1142

return interface_index

1670

1143

return if_nametoindex(interface)

1678

1151

sys.exit()

1679

1152

os.setsid()

1680

1153

if not nochdir:

1681

os.chdir("/")

1154

os.chdir(u"/")

1682

1155

if os.fork():

1683

1156

sys.exit()

1684

1157

if not noclose:

1686

1159

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

1687

1160

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

1688

1161

raise OSError(errno.ENODEV,

1689

"%s not a character device"

1690

% os.path.devnull)

1162

u"/dev/null not a character device")

1691

1163

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

1692

1164

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

1693

1165

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

1697

1169

1698

1170

def main():

1699

1171

1700

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

1172

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

1701

1173

# Parsing of options, both command line and config file

1702

1174

1703

parser = argparse.ArgumentParser()

1704

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

1705

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

1706

help="show version number and exit")

1707

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

1708

help="Bind to interface IF")

1709

parser.add_argument("-a", "--address",

1710

help="Address to listen for requests on")

1711

parser.add_argument("-p", "--port", type=int,

1712

help="Port number to receive requests on")

1713

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

1714

help="Run self-test")

1715

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

1716

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

1717

" to terminal")

1718

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

1719

help="Debug level for stdout output")

1720

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

1721

" priority string (see GnuTLS documentation)")

1722

parser.add_argument("--servicename",

1723

metavar="NAME", help="Zeroconf service name")

1724

parser.add_argument("--configdir",

1725

default="/etc/mandos", metavar="DIR",

1726

help="Directory to search for configuration"

1727

" files")

1728

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

1729

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

1730

" system bus interface")

1731

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

1732

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

1733

options = parser.parse_args()

1175

parser = optparse.OptionParser(version = "%%prog %s" % version)

1176

parser.add_option("-i", u"--interface", type=u"string",

1177

metavar="IF", help=u"Bind to interface IF")

1178

parser.add_option("-a", u"--address", type=u"string",

1179

help=u"Address to listen for requests on")

1180

parser.add_option("-p", u"--port", type=u"int",

1181

help=u"Port number to receive requests on")

1182

parser.add_option("--check", action=u"store_true",

1183

help=u"Run self-test")

1184

parser.add_option("--debug", action=u"store_true",

1185

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

1186

u" terminal")

1187

parser.add_option("--priority", type=u"string", help=u"GnuTLS"

1188

u" priority string (see GnuTLS documentation)")

1189

parser.add_option("--servicename", type=u"string",

1190

metavar=u"NAME", help=u"Zeroconf service name")

1191

parser.add_option("--configdir", type=u"string",

1192

default=u"/etc/mandos", metavar=u"DIR",

1193

help=u"Directory to search for configuration"

1194

u" files")

1195

parser.add_option("--no-dbus", action=u"store_false",

1196

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

1197

u" system bus interface")

1198

parser.add_option("--no-ipv6", action=u"store_false",

1199

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

1200

options = parser.parse_args()[0]

1734

1201

1735

1202

if options.check:

1736

1203

import doctest

1738

1205

sys.exit()

1739

1206

1740

1207

# Default values for config file for server-global settings

1741

server_defaults = { "interface": "",

1742

"address": "",

1743

"port": "",

1744

"debug": "False",

1745

"priority":

1746

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

1747

"servicename": "Mandos",

1748

"use_dbus": "True",

1749

"use_ipv6": "True",

1750

"debuglevel": "",

1208

server_defaults = { u"interface": u"",

1209

u"address": u"",

1210

u"port": u"",

1211

u"debug": u"False",

1212

u"priority":

1213

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

1214

u"servicename": u"Mandos",

1215

u"use_dbus": u"True",

1216

u"use_ipv6": u"True",

1751

1217

}

1752

1218

1753

1219

# Parse config file for server-global settings

1754

1220

server_config = configparser.SafeConfigParser(server_defaults)

1755

1221

del server_defaults

1756

1222

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

1757

"mandos.conf"))

1223

u"mandos.conf"))

1758

1224

# Convert the SafeConfigParser object to a dict

1759

1225

server_settings = server_config.defaults()

1760

1226

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

1761

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

1762

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

1227

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

1228

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

1763

1229

option)

1764

1230

if server_settings["port"]:

1765

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

1766

"port")

1231

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

1232

u"port")

1767

1233

del server_config

1768

1234

1769

1235

# Override the settings from the config file with command line

1770

1236

# options, if set.

1771

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

1772

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

1773

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

1237

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

1238

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

1239

u"use_dbus", u"use_ipv6"):

1774

1240

value = getattr(options, option)

1775

1241

if value is not None:

1776

1242

server_settings[option] = value

1784

1250

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

1785

1251

1786

1252

# For convenience

1787

debug = server_settings["debug"]

1788

debuglevel = server_settings["debuglevel"]

1789

use_dbus = server_settings["use_dbus"]

1790

use_ipv6 = server_settings["use_ipv6"]

1791

1792

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

1253

debug = server_settings[u"debug"]

1254

use_dbus = server_settings[u"use_dbus"]

1255

use_ipv6 = server_settings[u"use_ipv6"]

1256

1257

if not debug:

1258

syslogger.setLevel(logging.WARNING)

1259

console.setLevel(logging.WARNING)

1260

1261

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

1793

1262

syslogger.setFormatter(logging.Formatter

1794

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

1795

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

1796

% server_settings["servicename"]))

1263

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

1264

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

1265

% server_settings[u"servicename"]))

1797

1266

1798

1267

# Parse config file with clients

1799

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

1800

"interval": "5m",

1801

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

1802

"host": "",

1803

"approval_delay": "0s",

1804

"approval_duration": "1s",

1268

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

1269

u"interval": u"5m",

1270

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

1271

u"host": u"",

1805

1272

}

1806

1273

client_config = configparser.SafeConfigParser(client_defaults)

1807

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

1808

"clients.conf"))

1274

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

1275

u"clients.conf"))

1809

1276

1810

1277

global mandos_dbus_service

1811

1278

mandos_dbus_service = None

1812

1279

1813

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

1814

server_settings["port"]),

1280

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

1281

server_settings[u"port"]),

1815

1282

ClientHandler,

1816

interface=(server_settings["interface"]

1817

or None),

1283

interface=server_settings[u"interface"],

1818

1284

use_ipv6=use_ipv6,

1819

1285

gnutls_priority=

1820

server_settings["priority"],

1286

server_settings[u"priority"],

1821

1287

use_dbus=use_dbus)

1822

if not debug:

1823

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

1824

try:

1825

pidfile = open(pidfilename, "w")

1826

except IOError:

1827

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

1288

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

1289

try:

1290

pidfile = open(pidfilename, u"w")

1291

except IOError:

1292

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

1828

1293

1829

1294

try:

1830

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

1831

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

1295

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

1296

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

1832

1297

except KeyError:

1833

1298

try:

1834

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

1835

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

1299

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

1300

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

1836

1301

except KeyError:

1837

1302

try:

1838

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

1839

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

1303

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

1304

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

1840

1305

except KeyError:

1841

1306

uid = 65534

1842

1307

gid = 65534

1843

1308

try:

1844

1309

os.setgid(gid)

1845

1310

os.setuid(uid)

1846

except OSError as error:

1311

except OSError, error:

1847

1312

if error[0] != errno.EPERM:

1848

1313

raise error

1849

1314

1850

if not debug and not debuglevel:

1851

syslogger.setLevel(logging.WARNING)

1852

console.setLevel(logging.WARNING)

1853

if debuglevel:

1854

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

1855

syslogger.setLevel(level)

1856

console.setLevel(level)

1857

1315

# Enable all possible GnuTLS debugging

1858

1316

if debug:

1859

# Enable all possible GnuTLS debugging

1860

1861

1317

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

1862

1318

# - GnuTLS manual

1863

1319

gnutls.library.functions.gnutls_global_set_log_level(11)

1864

1320

1865

1321

@gnutls.library.types.gnutls_log_func

1866

1322

def debug_gnutls(level, string):

1867

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

1323

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

1868

1324

1869

1325

(gnutls.library.functions

1870

1326

.gnutls_global_set_log_function(debug_gnutls))

1871

1872

# Redirect stdin so all checkers get /dev/null

1873

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

1874

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

1875

if null > 2:

1876

os.close(null)

1877

else:

1878

# No console logging

1879

logger.removeHandler(console)

1880

1881

# Need to fork before connecting to D-Bus

1882

if not debug:

1883

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

1884

daemon()

1885

1327

1886

1328

global main_loop

1887

1329

# From the Avahi example code

1890

1332

bus = dbus.SystemBus()

1891

1333

# End of Avahi example code

1892

1334

if use_dbus:

1893

try:

1894

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

1895

bus, do_not_queue=True)

1896

except dbus.exceptions.NameExistsException as e:

1897

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

1898

use_dbus = False

1899

server_settings["use_dbus"] = False

1900

tcp_server.use_dbus = False

1335

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

1901

1336

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1902

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

1903

servicetype = "_mandos._tcp",

1337

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

1338

servicetype = u"_mandos._tcp",

1904

1339

protocol = protocol, bus = bus)

1905

1340

if server_settings["interface"]:

1906

1341

service.interface = (if_nametoindex

1907

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

1908

1909

global multiprocessing_manager

1910

multiprocessing_manager = multiprocessing.Manager()

1342

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

1911

1343

1912

1344

client_class = Client

1913

1345

if use_dbus:

1914

1346

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

1915

def client_config_items(config, section):

1916

special_settings = {

1917

"approved_by_default":

1918

lambda: config.getboolean(section,

1919

"approved_by_default"),

1920

}

1921

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

1922

try:

1923

yield (name, special_settings[name]())

1924

except KeyError:

1925

yield (name, value)

1926

1927

1347

tcp_server.clients.update(set(

1928

1348

client_class(name = section,

1929

config= dict(client_config_items(

1930

client_config, section)))

1349

config= dict(client_config.items(section)))

1931

1350

for section in client_config.sections()))

1932

1351

if not tcp_server.clients:

1933

logger.warning("No clients defined")

1352

logger.warning(u"No clients defined")

1353

1354

if debug:

1355

# Redirect stdin so all checkers get /dev/null

1356

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

1357

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

1358

if null > 2:

1359

os.close(null)

1360

else:

1361

# No console logging

1362

logger.removeHandler(console)

1363

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

1364

daemon()

1365

1366

try:

1367

with closing(pidfile):

1368

pid = os.getpid()

1369

pidfile.write(str(pid) + "\n")

1370

del pidfile

1371

except IOError:

1372

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

1373

pidfilename, pid)

1374

except NameError:

1375

# "pidfile" was never created

1376

pass

1377

del pidfilename

1378

1379

def cleanup():

1380

"Cleanup function; run on exit"

1381

service.cleanup()

1934

1382

1383

while tcp_server.clients:

1384

client = tcp_server.clients.pop()

1385

client.disable_hook = None

1386

client.disable()

1387

1388

atexit.register(cleanup)

1389

1935

1390

if not debug:

1936

try:

1937

with pidfile:

1938

pid = os.getpid()

1939

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

1940

del pidfile

1941

except IOError:

1942

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

1943

pidfilename, pid)

1944

except NameError:

1945

# "pidfile" was never created

1946

pass

1947

del pidfilename

1948

1949

1391

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

1950

1951

1392

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

1952

1393

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

1953

1394

1955

1396

class MandosDBusService(dbus.service.Object):

1956

1397

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

1957

1398

def __init__(self):

1958

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

1959

_interface = "se.bsnet.fukt.Mandos"

1960

1961

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

1962

def ClientAdded(self, objpath):

1963

"D-Bus signal"

1964

pass

1965

1966

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

1967

def ClientNotFound(self, fingerprint, address):

1968

"D-Bus signal"

1969

pass

1970

1971

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

1399

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

1400

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

1401

1402

@dbus.service.signal(_interface, signature=u"oa{sv}")

1403

def ClientAdded(self, objpath, properties):

1404

"D-Bus signal"

1405

pass

1406

1407

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

1408

def ClientNotFound(self, fingerprint):

1409

"D-Bus signal"

1410

pass

1411

1412

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

1972

1413

def ClientRemoved(self, objpath, name):

1973

1414

"D-Bus signal"

1974

1415

pass

1975

1416

1976

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

1417

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

1977

1418

def GetAllClients(self):

1978

1419

"D-Bus method"

1979

1420

return dbus.Array(c.dbus_object_path

1980

1421

for c in tcp_server.clients)

1981

1422

1982

1423

@dbus.service.method(_interface,

1983

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

1424

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

1984

1425

def GetAllClientsWithProperties(self):

1985

1426

"D-Bus method"

1986

1427

return dbus.Dictionary(

1987

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

1428

((c.dbus_object_path, c.GetAllProperties())

1988

1429

for c in tcp_server.clients),

1989

signature="oa{sv}")

1430

signature=u"oa{sv}")

1990

1431

1991

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

1432

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

1992

1433

def RemoveClient(self, object_path):

1993

1434

"D-Bus method"

1994

1435

for c in tcp_server.clients:

1996

1437

tcp_server.clients.remove(c)

1997

1438

c.remove_from_connection()

1998

1439

# Don't signal anything except ClientRemoved

1999

c.disable(quiet=True)

1440

c.disable(signal=False)

2000

1441

# Emit D-Bus signal

2001

1442

self.ClientRemoved(object_path, c.name)

2002

1443

return

2003

raise KeyError(object_path)

1444

raise KeyError

2004

1445

2005

1446

del _interface

2006

1447

2007

1448

mandos_dbus_service = MandosDBusService()

2008

1449

2009

def cleanup():

2010

"Cleanup function; run on exit"

2011

service.cleanup()

2012

2013

while tcp_server.clients:

2014

client = tcp_server.clients.pop()

2015

if use_dbus:

2016

client.remove_from_connection()

2017

client.disable_hook = None

2018

# Don't signal anything except ClientRemoved

2019

client.disable(quiet=True)

2020

if use_dbus:

2021

# Emit D-Bus signal

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2023

client.name)

2024

2025

atexit.register(cleanup)

2026

2027

1450

for client in tcp_server.clients:

2028

1451

if use_dbus:

2029

1452

# Emit D-Bus signal

2030

mandos_dbus_service.ClientAdded(client.dbus_object_path)

1453

mandos_dbus_service.ClientAdded(client.dbus_object_path,

1454

client.GetAllProperties())

2031

1455

client.enable()

2032

1456

2033

1457

tcp_server.enable()

2036

1460

# Find out what port we got

2037

1461

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

2038

1462

if use_ipv6:

2039

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

1463

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

2040

1464

" flowinfo %d, scope_id %d"

2041

1465

% tcp_server.socket.getsockname())

2042

1466

else: # IPv4

2043

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

1467

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

2044

1468

% tcp_server.socket.getsockname())

2045

1469

2046

1470

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

2049

1473

# From the Avahi example code

2050

1474

try:

2051

1475

service.activate()

2052

except dbus.exceptions.DBusException as error:

2053

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

2054

cleanup()

1476

except dbus.exceptions.DBusException, error:

1477

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

2055

1478

sys.exit(1)

2056

1479

# End of Avahi example code

2057

1480

2060

1483

(tcp_server.handle_request

2061

1484

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

2062

1485

2063

logger.debug("Starting main loop")

1486

logger.debug(u"Starting main loop")

2064

1487

main_loop.run()

2065

except AvahiError as error:

2066

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

2067

cleanup()

1488

except AvahiError, error:

1489

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

2068

1490

sys.exit(1)

2069

1491

except KeyboardInterrupt:

2070

1492

if debug:

2071

print("", file=sys.stderr)

2072

logger.debug("Server received KeyboardInterrupt")

2073

logger.debug("Server exiting")

2074

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

2075

cleanup()

1493

print >> sys.stderr

1494

logger.debug(u"Server received KeyboardInterrupt")

1495

logger.debug(u"Server exiting")

2076

1496

2077

1497

if __name__ == '__main__':

2078

1498

main()