/mandos/trunk : revision 505.3.6

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import division, absolute_import, unicode_literals

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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import socket

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import optparse

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import functools

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import cPickle as pickle

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import multiprocessing

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import types

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import dbus

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import dbus.service

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SO_BINDTODEVICE = None

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version = "1.2.3"

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version = "1.4.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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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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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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

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self.name = unicode(self.server

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.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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syslogger.setFormatter(logging.Formatter

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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, error:

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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.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.group.connect_to_signal('StateChanged',

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self

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.entry_group_state_changed)

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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.name, self.type)

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self.group.AddService(

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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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self.group.Free()

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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 = None

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def server_state_changed(self, state):

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self.remove()

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

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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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if state == avahi.SERVER_COLLISION:

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logger.error("Zeroconf server name collision")

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self.remove()

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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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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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avahi.DBUS_PATH_SERVER,

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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

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

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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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class Client(object):

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

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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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extended_timeout: extra long timeout when password has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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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 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 _timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.extended_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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return _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 _timedelta_to_milliseconds(self.approval_delay)

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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.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.extended_timeout = string_to_delta(config

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["extended_timeout"])

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self.interval = string_to_delta(config["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.expires = None

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self.checker_callback_tag = None

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self.checker_command = config["checker"]

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self.current_checker_command = None

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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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self.changedstate = (multiprocessing_manager

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.Condition(multiprocessing_manager

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.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"""

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if getattr(self, "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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# Schedule a disable() when 'timeout' has passed

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

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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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self.last_enabled = datetime.datetime.utcnow()

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# Also start a new checker *right now*.

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self.start_checker()

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if getattr(self, "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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self.expires = None

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

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vars(self))

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def checked_ok(self):

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def checked_ok(self, timeout=None):

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"""Bump up the timeout for this client.

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

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alive and well.

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"""

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if timeout is None:

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timeout = self.timeout

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self.last_checked_ok = datetime.datetime.utcnow()

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gobject.source_remove(self.disable_initiator_tag)

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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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if self.disable_initiator_tag is not None:

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gobject.source_remove(self.disable_initiator_tag)

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

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self.disable_initiator_tag = (gobject.timeout_add

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(_timedelta_to_milliseconds

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(timeout), self.disable))

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

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def need_approval(self):

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self.last_approval_request = datetime.datetime.utcnow()

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

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try:

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

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except (AttributeError, OSError), error:

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except (AttributeError, OSError) as error:

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if (isinstance(error, OSError)

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and error.errno != errno.ECHILD):

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raise error

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'replace')))

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for attr in

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self.runtime_expansions)

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try:

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command = self.checker_command % escaped_attrs

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except TypeError, error:

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except TypeError as error:

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

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' %s', self.checker_command, error)

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return True # Try again later

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if pid:

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback(pid, status, command)

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except OSError, error:

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except OSError as error:

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

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error)

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

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#time.sleep(0.5)

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

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

518

except OSError, error:

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except OSError as error:

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

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raise

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self.checker = None

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def dbus_service_property(dbus_interface, signature="v",

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access="readwrite", byte_arrays=False):

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"""Decorators for marking methods of a DBusObjectWithProperties to

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class DBusObjectWithProperties(dbus.service.Object):

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"""A D-Bus object with properties.

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623

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Classes inheriting from this can use the dbus_service_property

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

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

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def _get_all_dbus_properties(self):

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

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635

"""

587

return ((prop._dbus_name, prop)

636

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

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for cls in self.__class__.__mro__

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for name, prop in

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inspect.getmembers(self, self._is_dbus_property))

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inspect.getmembers(cls, self._is_dbus_property))

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def _get_dbus_property(self, interface_name, property_name):

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

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property with the specified name and interface.

594

644

"""

595

for name in (property_name,

596

property_name + "_dbus_property"):

597

prop = getattr(self, name, None)

598

if (prop is None

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or not self._is_dbus_property(prop)

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or prop._dbus_name != property_name

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or (interface_name and prop._dbus_interface

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and interface_name != prop._dbus_interface)):

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continue

604

return prop

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for cls in self.__class__.__mro__:

646

for name, value in (inspect.getmembers

647

(cls, self._is_dbus_property)):

648

if (value._dbus_name == property_name

649

and value._dbus_interface == interface_name):

650

return value.__get__(self)

651

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# No such property

606

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raise DBusPropertyNotFound(self.dbus_object_path + ":"

607

654

+ interface_name + "."

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688

def GetAll(self, interface_name):

642

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

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690

standard.

644

691

645

692

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

646

693

"""

647

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all = {}

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

704

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document.unlink()

705

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except (AttributeError, xml.dom.DOMException,

706

xml.parsers.expat.ExpatError), error:

753

xml.parsers.expat.ExpatError) as error:

707

754

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

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error)

709

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return xmlstring

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711

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def datetime_to_dbus (dt, variant_level=0):

760

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

761

if dt is None:

762

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

763

return dbus.String(dt.isoformat(),

764

variant_level=variant_level)

765

766

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

767

.__metaclass__):

768

"""Applied to an empty subclass of a D-Bus object, this metaclass

769

will add additional D-Bus attributes matching a certain pattern.

770

"""

771

def __new__(mcs, name, bases, attr):

772

# Go through all the base classes which could have D-Bus

773

# methods, signals, or properties in them

774

for base in (b for b in bases

775

if issubclass(b, dbus.service.Object)):

776

# Go though all attributes of the base class

777

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

778

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

779

# with the wrong interface name

780

if (not hasattr(attribute, "_dbus_interface")

781

or not attribute._dbus_interface

782

.startswith("se.recompile.Mandos")):

783

continue

784

# Create an alternate D-Bus interface name based on

785

# the current name

786

alt_interface = (attribute._dbus_interface

787

.replace("se.recompile.Mandos",

788

"se.bsnet.fukt.Mandos"))

789

# Is this a D-Bus signal?

790

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

791

# Extract the original non-method function by

792

# black magic

793

nonmethod_func = (dict(

794

zip(attribute.func_code.co_freevars,

795

attribute.__closure__))["func"]

796

.cell_contents)

797

# Create a new, but exactly alike, function

798

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

799

# with the alternate D-Bus interface name

800

new_function = (dbus.service.signal

801

(alt_interface,

802

attribute._dbus_signature)

803

(types.FunctionType(

804

nonmethod_func.func_code,

805

nonmethod_func.func_globals,

806

nonmethod_func.func_name,

807

nonmethod_func.func_defaults,

808

nonmethod_func.func_closure)))

809

# Define a creator of a function to call both the

810

# old and new functions, so both the old and new

811

# signals gets sent when the function is called

812

def fixscope(func1, func2):

813

"""This function is a scope container to pass

814

func1 and func2 to the "call_both" function

815

outside of its arguments"""

816

def call_both(*args, **kwargs):

817

"""This function will emit two D-Bus

818

signals by calling func1 and func2"""

819

func1(*args, **kwargs)

820

func2(*args, **kwargs)

821

return call_both

822

# Create the "call_both" function and add it to

823

# the class

824

attr[attrname] = fixscope(attribute,

825

new_function)

826

# Is this a D-Bus method?

827

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

828

# Create a new, but exactly alike, function

829

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

830

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

831

# to the class.

832

attr[attrname] = (dbus.service.method

833

(alt_interface,

834

attribute._dbus_in_signature,

835

attribute._dbus_out_signature)

836

(types.FunctionType

837

(attribute.func_code,

838

attribute.func_globals,

839

attribute.func_name,

840

attribute.func_defaults,

841

attribute.func_closure)))

842

# Is this a D-Bus property?

843

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

844

# Create a new, but exactly alike, function

845

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

846

# property with the alternate D-Bus interface

847

# name. Add it to the class.

848

attr[attrname] = (dbus_service_property

849

(alt_interface,

850

attribute._dbus_signature,

851

attribute._dbus_access,

852

attribute

853

._dbus_get_args_options

854

["byte_arrays"])

855

(types.FunctionType

856

(attribute.func_code,

857

attribute.func_globals,

858

attribute.func_name,

859

attribute.func_defaults,

860

attribute.func_closure)))

861

return type.__new__(mcs, name, bases, attr)

862

712

863

class ClientDBus(Client, DBusObjectWithProperties):

713

864

"""A Client class using D-Bus

714

865

736

887

DBusObjectWithProperties.__init__(self, self.bus,

737

888

self.dbus_object_path)

738

889

739

def _get_approvals_pending(self):

740

return self._approvals_pending

741

def _set_approvals_pending(self, value):

742

old_value = self._approvals_pending

743

self._approvals_pending = value

744

bval = bool(value)

745

if (hasattr(self, "dbus_object_path")

746

and bval is not bool(old_value)):

747

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

748

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

749

dbus_bool)

890

def notifychangeproperty(transform_func,

891

dbus_name, type_func=lambda x: x,

892

variant_level=1):

893

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

894

its changes to DBus.

750

895

751

approvals_pending = property(_get_approvals_pending,

752

_set_approvals_pending)

753

del _get_approvals_pending, _set_approvals_pending

754

755

@staticmethod

756

def _datetime_to_dbus(dt, variant_level=0):

757

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

758

return dbus.String(dt.isoformat(),

759

variant_level=variant_level)

760

761

def enable(self):

762

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

763

r = Client.enable(self)

764

if oldstate != self.enabled:

765

# Emit D-Bus signals

766

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

767

dbus.Boolean(True, variant_level=1))

768

self.PropertyChanged(

769

dbus.String("LastEnabled"),

770

self._datetime_to_dbus(self.last_enabled,

771

variant_level=1))

772

return r

773

774

def disable(self, quiet = False):

775

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

776

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

777

if not quiet and oldstate != self.enabled:

778

# Emit D-Bus signal

779

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

780

dbus.Boolean(False, variant_level=1))

781

return r

896

transform_fun: Function that takes a value and a variant_level

897

and transforms it to a D-Bus type.

898

dbus_name: D-Bus name of the variable

899

type_func: Function that transform the value before sending it

900

to the D-Bus. Default: no transform

901

variant_level: D-Bus variant level. Default: 1

902

"""

903

attrname = "_{0}".format(dbus_name)

904

def setter(self, value):

905

if hasattr(self, "dbus_object_path"):

906

if (not hasattr(self, attrname) or

907

type_func(getattr(self, attrname, None))

908

!= type_func(value)):

909

dbus_value = transform_func(type_func(value),

910

variant_level

911

=variant_level)

912

self.PropertyChanged(dbus.String(dbus_name),

913

dbus_value)

914

setattr(self, attrname, value)

915

916

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

917

918

919

expires = notifychangeproperty(datetime_to_dbus, "Expires")

920

approvals_pending = notifychangeproperty(dbus.Boolean,

921

"ApprovalPending",

922

type_func = bool)

923

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

924

last_enabled = notifychangeproperty(datetime_to_dbus,

925

"LastEnabled")

926

checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",

927

type_func = lambda checker:

928

checker is not None)

929

last_checked_ok = notifychangeproperty(datetime_to_dbus,

930

"LastCheckedOK")

931

last_approval_request = notifychangeproperty(

932

datetime_to_dbus, "LastApprovalRequest")

933

approved_by_default = notifychangeproperty(dbus.Boolean,

934

"ApprovedByDefault")

935

approval_delay = notifychangeproperty(dbus.UInt16,

936

"ApprovalDelay",

937

type_func =

938

_timedelta_to_milliseconds)

939

approval_duration = notifychangeproperty(

940

dbus.UInt16, "ApprovalDuration",

941

type_func = _timedelta_to_milliseconds)

942

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

943

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

944

type_func =

945

_timedelta_to_milliseconds)

946

extended_timeout = notifychangeproperty(

947

dbus.UInt16, "ExtendedTimeout",

948

type_func = _timedelta_to_milliseconds)

949

interval = notifychangeproperty(dbus.UInt16,

950

"Interval",

951

type_func =

952

_timedelta_to_milliseconds)

953

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

954

955

del notifychangeproperty

782

956

783

957

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

784

958

try:

793

967

*args, **kwargs):

794

968

self.checker_callback_tag = None

795

969

self.checker = None

796

# Emit D-Bus signal

797

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

798

dbus.Boolean(False, variant_level=1))

799

970

if os.WIFEXITED(condition):

800

971

exitstatus = os.WEXITSTATUS(condition)

801

972

# Emit D-Bus signal

811

982

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

812

983

*args, **kwargs)

813

984

814

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

815

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

816

# Emit D-Bus signal

817

self.PropertyChanged(

818

dbus.String("LastCheckedOK"),

819

(self._datetime_to_dbus(self.last_checked_ok,

820

variant_level=1)))

821

return r

822

823

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

824

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

825

# Emit D-Bus signal

826

self.PropertyChanged(

827

dbus.String("LastApprovalRequest"),

828

(self._datetime_to_dbus(self.last_approval_request,

829

variant_level=1)))

830

return r

831

832

985

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

833

986

old_checker = self.checker

834

987

if self.checker is not None:

841

994

and old_checker_pid != self.checker.pid):

842

995

# Emit D-Bus signal

843

996

self.CheckerStarted(self.current_checker_command)

844

self.PropertyChanged(

845

dbus.String("CheckerRunning"),

846

dbus.Boolean(True, variant_level=1))

847

997

return r

848

998

849

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

850

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

851

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

852

if (old_checker is not None

853

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

854

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

855

dbus.Boolean(False, variant_level=1))

856

return r

857

858

999

def _reset_approved(self):

859

1000

self._approved = None

860

1001

return False

862

1003

def approve(self, value=True):

863

1004

self.send_changedstate()

864

1005

self._approved = value

865

gobject.timeout_add(self._timedelta_to_milliseconds

1006

gobject.timeout_add(_timedelta_to_milliseconds

866

1007

(self.approval_duration),

867

1008

self._reset_approved)

868

1009

869

1010

870

1011

## D-Bus methods, signals & properties

871

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

1012

_interface = "se.recompile.Mandos.Client"

872

1013

873

1014

## Signals

874

1015

921

1062

# CheckedOK - method

922

1063

@dbus.service.method(_interface)

923

1064

def CheckedOK(self):

924

return self.checked_ok()

1065

self.checked_ok()

925

1066

926

1067

# Enable - method

927

1068

@dbus.service.method(_interface)

960

1101

if value is None: # get

961

1102

return dbus.Boolean(self.approved_by_default)

962

1103

self.approved_by_default = bool(value)

963

# Emit D-Bus signal

964

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

965

dbus.Boolean(value, variant_level=1))

966

1104

967

1105

# ApprovalDelay - property

968

1106

@dbus_service_property(_interface, signature="t",

971

1109

if value is None: # get

972

1110

return dbus.UInt64(self.approval_delay_milliseconds())

973

1111

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

974

# Emit D-Bus signal

975

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

976

dbus.UInt64(value, variant_level=1))

977

1112

978

1113

# ApprovalDuration - property

979

1114

@dbus_service_property(_interface, signature="t",

980

1115

access="readwrite")

981

1116

def ApprovalDuration_dbus_property(self, value=None):

982

1117

if value is None: # get

983

return dbus.UInt64(self._timedelta_to_milliseconds(

1118

return dbus.UInt64(_timedelta_to_milliseconds(

984

1119

self.approval_duration))

985

1120

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

986

# Emit D-Bus signal

987

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

988

dbus.UInt64(value, variant_level=1))

989

1121

990

1122

# Name - property

991

1123

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

1004

1136

if value is None: # get

1005

1137

return dbus.String(self.host)

1006

1138

self.host = value

1007

# Emit D-Bus signal

1008

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

1009

dbus.String(value, variant_level=1))

1010

1139

1011

1140

# Created - property

1012

1141

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

1013

1142

def Created_dbus_property(self):

1014

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

1143

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

1015

1144

1016

1145

# LastEnabled - property

1017

1146

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

1018

1147

def LastEnabled_dbus_property(self):

1019

if self.last_enabled is None:

1020

return dbus.String("")

1021

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

1148

return datetime_to_dbus(self.last_enabled)

1022

1149

1023

1150

# Enabled - property

1024

1151

@dbus_service_property(_interface, signature="b",

1038

1165

if value is not None:

1039

1166

self.checked_ok()

1040

1167

return

1041

if self.last_checked_ok is None:

1042

return dbus.String("")

1043

return dbus.String(self._datetime_to_dbus(self

1044

.last_checked_ok))

1168

return datetime_to_dbus(self.last_checked_ok)

1169

1170

# Expires - property

1171

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

1172

def Expires_dbus_property(self):

1173

return datetime_to_dbus(self.expires)

1045

1174

1046

1175

# LastApprovalRequest - property

1047

1176

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

1048

1177

def LastApprovalRequest_dbus_property(self):

1049

if self.last_approval_request is None:

1050

return dbus.String("")

1051

return dbus.String(self.

1052

_datetime_to_dbus(self

1053

.last_approval_request))

1178

return datetime_to_dbus(self.last_approval_request)

1054

1179

1055

1180

# Timeout - property

1056

1181

@dbus_service_property(_interface, signature="t",

1059

1184

if value is None: # get

1060

1185

return dbus.UInt64(self.timeout_milliseconds())

1061

1186

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

1062

# Emit D-Bus signal

1063

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

1064

dbus.UInt64(value, variant_level=1))

1065

1187

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

1066

1188

return

1067

1189

# Reschedule timeout

1068

1190

gobject.source_remove(self.disable_initiator_tag)

1069

1191

self.disable_initiator_tag = None

1070

time_to_die = (self.

1071

_timedelta_to_milliseconds((self

1072

.last_checked_ok

1073

+ self.timeout)

1074

- datetime.datetime

1075

.utcnow()))

1192

self.expires = None

1193

time_to_die = _timedelta_to_milliseconds((self

1194

.last_checked_ok

1195

+ self.timeout)

1196

- datetime.datetime

1197

.utcnow())

1076

1198

if time_to_die <= 0:

1077

1199

# The timeout has passed

1078

1200

self.disable()

1079

1201

else:

1202

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

1203

+ datetime.timedelta(milliseconds =

1204

time_to_die))

1080

1205

self.disable_initiator_tag = (gobject.timeout_add

1081

1206

(time_to_die, self.disable))

1082

1207

1208

# ExtendedTimeout - property

1209

@dbus_service_property(_interface, signature="t",

1210

access="readwrite")

1211

def ExtendedTimeout_dbus_property(self, value=None):

1212

if value is None: # get

1213

return dbus.UInt64(self.extended_timeout_milliseconds())

1214

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

1215

1083

1216

# Interval - property

1084

1217

@dbus_service_property(_interface, signature="t",

1085

1218

access="readwrite")

1087

1220

if value is None: # get

1088

1221

return dbus.UInt64(self.interval_milliseconds())

1089

1222

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

1090

# Emit D-Bus signal

1091

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

1092

dbus.UInt64(value, variant_level=1))

1093

1223

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

1094

1224

return

1095

1225

# Reschedule checker run

1097

1227

self.checker_initiator_tag = (gobject.timeout_add

1098

1228

(value, self.start_checker))

1099

1229

self.start_checker() # Start one now, too

1100

1230

1101

1231

# Checker - property

1102

1232

@dbus_service_property(_interface, signature="s",

1103

1233

access="readwrite")

1105

1235

if value is None: # get

1106

1236

return dbus.String(self.checker_command)

1107

1237

self.checker_command = value

1108

# Emit D-Bus signal

1109

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

1110

dbus.String(self.checker_command,

1111

variant_level=1))

1112

1238

1113

1239

# CheckerRunning - property

1114

1240

@dbus_service_property(_interface, signature="b",

1141

1267

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

1142

1268

if not self._pipe.recv():

1143

1269

raise KeyError()

1144

1270

1145

1271

def __getattribute__(self, name):

1146

1272

if(name == '_pipe'):

1147

1273

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

1154

1280

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

1155

1281

return self._pipe.recv()[1]

1156

1282

return func

1157

1283

1158

1284

def __setattr__(self, name, value):

1159

1285

if(name == '_pipe'):

1160

1286

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

1161

1287

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

1162

1288

1289

class ClientDBusTransitional(ClientDBus):

1290

__metaclass__ = AlternateDBusNamesMetaclass

1163

1291

1164

1292

class ClientHandler(socketserver.BaseRequestHandler, object):

1165

1293

"""A class to handle client connections.

1173

1301

unicode(self.client_address))

1174

1302

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

1175

1303

self.server.child_pipe.fileno())

1176

1304

1177

1305

session = (gnutls.connection

1178

1306

.ClientSession(self.request,

1179

1307

gnutls.connection

1180

1308

.X509Credentials()))

1181

1309

1182

1310

# Note: gnutls.connection.X509Credentials is really a

1183

1311

# generic GnuTLS certificate credentials object so long as

1184

1312

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

1185

1313

# here despite using OpenPGP certificates.

1186

1314

1187

1315

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

1188

1316

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

1189

1317

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

1195

1323

(gnutls.library.functions

1196

1324

.gnutls_priority_set_direct(session._c_object,

1197

1325

priority, None))

1198

1326

1199

1327

# Start communication using the Mandos protocol

1200

1328

# Get protocol number

1201

1329

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

1203

1331

try:

1204

1332

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

1205

1333

raise RuntimeError

1206

except (ValueError, IndexError, RuntimeError), error:

1334

except (ValueError, IndexError, RuntimeError) as error:

1207

1335

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

1208

1336

return

1209

1337

1210

1338

# Start GnuTLS connection

1211

1339

try:

1212

1340

session.handshake()

1213

except gnutls.errors.GNUTLSError, error:

1341

except gnutls.errors.GNUTLSError as error:

1214

1342

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

1215

1343

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

1216

1344

# established. Just abandon the request.

1217

1345

return

1218

1346

logger.debug("Handshake succeeded")

1219

1347

1220

1348

approval_required = False

1221

1349

try:

1222

1350

try:

1223

1351

fpr = self.fingerprint(self.peer_certificate

1224

1352

(session))

1225

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

1353

except (TypeError,

1354

gnutls.errors.GNUTLSError) as error:

1226

1355

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

1227

1356

return

1228

1357

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

1229

1358

1230

1359

try:

1231

1360

client = ProxyClient(child_pipe, fpr,

1232

1361

self.client_address)

1240

1369

1241

1370

while True:

1242

1371

if not client.enabled:

1243

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

1372

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

1244

1373

client.name)

1245

1374

if self.server.use_dbus:

1246

1375

# Emit D-Bus signal

1247

client.Rejected("Disabled")

1376

client.Rejected("Disabled")

1248

1377

return

1249

1378

1250

1379

if client._approved or not client.approval_delay:

1267

1396

return

1268

1397

1269

1398

#wait until timeout or approved

1270

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

1271

1399

time = datetime.datetime.now()

1272

1400

client.changedstate.acquire()

1273

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

1401

(client.changedstate.wait

1402

(float(client._timedelta_to_milliseconds(delay)

1403

/ 1000)))

1274

1404

client.changedstate.release()

1275

1405

time2 = datetime.datetime.now()

1276

1406

if (time2 - time) >= delay:

1291

1421

while sent_size < len(client.secret):

1292

1422

try:

1293

1423

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

1294

except (gnutls.errors.GNUTLSError), error:

1424

except gnutls.errors.GNUTLSError as error:

1295

1425

logger.warning("gnutls send failed")

1296

1426

return

1297

1427

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

1298

1428

sent, len(client.secret)

1299

1429

- (sent_size + sent))

1300

1430

sent_size += sent

1301

1431

1302

1432

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

1303

# bump the timeout as if seen

1304

client.checked_ok()

1433

# bump the timeout using extended_timeout

1434

client.checked_ok(client.extended_timeout)

1305

1435

if self.server.use_dbus:

1306

1436

# Emit D-Bus signal

1307

1437

client.GotSecret()

1311

1441

client.approvals_pending -= 1

1312

1442

try:

1313

1443

session.bye()

1314

except (gnutls.errors.GNUTLSError), error:

1444

except gnutls.errors.GNUTLSError as error:

1315

1445

logger.warning("GnuTLS bye failed")

1316

1446

1317

1447

@staticmethod

1386

1516

except:

1387

1517

self.handle_error(request, address)

1388

1518

self.close_request(request)

1389

1519

1390

1520

def process_request(self, request, address):

1391

1521

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

1392

multiprocessing.Process(target = self.sub_process_main,

1393

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

1522

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

1523

args = (request,

1524

address))

1525

proc.start()

1526

return proc

1527

1394

1528

1395

1529

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1396

1530

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

1400

1534

This function creates a new pipe in self.pipe

1401

1535

"""

1402

1536

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1403

1404

super(MultiprocessingMixInWithPipe,

1405

self).process_request(request, client_address)

1537

1538

proc = MultiprocessingMixIn.process_request(self, request,

1539

client_address)

1406

1540

self.child_pipe.close()

1407

self.add_pipe(parent_pipe)

1408

1409

def add_pipe(self, parent_pipe):

1541

self.add_pipe(parent_pipe, proc)

1542

1543

def add_pipe(self, parent_pipe, proc):

1410

1544

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

1411

pass

1545

raise NotImplementedError

1546

1412

1547

1413

1548

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1414

1549

socketserver.TCPServer, object):

1441

1576

SO_BINDTODEVICE,

1442

1577

str(self.interface

1443

1578

+ '\0'))

1444

except socket.error, error:

1579

except socket.error as error:

1445

1580

if error[0] == errno.EPERM:

1446

1581

logger.error("No permission to"

1447

1582

" bind to interface %s",

1499

1634

def server_activate(self):

1500

1635

if self.enabled:

1501

1636

return socketserver.TCPServer.server_activate(self)

1637

1502

1638

def enable(self):

1503

1639

self.enabled = True

1504

def add_pipe(self, parent_pipe):

1640

1641

def add_pipe(self, parent_pipe, proc):

1505

1642

# Call "handle_ipc" for both data and EOF events

1506

1643

gobject.io_add_watch(parent_pipe.fileno(),

1507

1644

gobject.IO_IN | gobject.IO_HUP,

1508

1645

functools.partial(self.handle_ipc,

1509

parent_pipe = parent_pipe))

1510

1646

parent_pipe =

1647

parent_pipe,

1648

proc = proc))

1649

1511

1650

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

1512

client_object=None):

1651

proc = None, client_object=None):

1513

1652

condition_names = {

1514

1653

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

1515

1654

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

1524

1663

for cond, name in

1525

1664

condition_names.iteritems()

1526

1665

if cond & condition)

1527

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

1666

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

1528

1667

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

1668

# Wait for other process to exit

1669

proc.join()

1529

1670

return False

1530

1671

1531

1672

# Read a request from the child

1541

1682

client = c

1542

1683

break

1543

1684

else:

1544

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

1545

"dress: %s", fpr, address)

1685

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

1686

"dress: %s", fpr, address)

1546

1687

if self.use_dbus:

1547

1688

# Emit D-Bus signal

1548

mandos_dbus_service.ClientNotFound(fpr, address[0])

1689

mandos_dbus_service.ClientNotFound(fpr,

1690

address[0])

1549

1691

parent_pipe.send(False)

1550

1692

return False

1551

1693

1552

1694

gobject.io_add_watch(parent_pipe.fileno(),

1553

1695

gobject.IO_IN | gobject.IO_HUP,

1554

1696

functools.partial(self.handle_ipc,

1555

parent_pipe = parent_pipe,

1556

client_object = client))

1697

parent_pipe =

1698

parent_pipe,

1699

proc = proc,

1700

client_object =

1701

client))

1557

1702

parent_pipe.send(True)

1558

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

1703

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

1704

# same fileno

1559

1705

return False

1560

1706

if command == 'funcall':

1561

1707

funcname = request[1]

1562

1708

args = request[2]

1563

1709

kwargs = request[3]

1564

1710

1565

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

1566

1711

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

1712

funcname)(*args,

1713

**kwargs)))

1714

1567

1715

if command == 'getattr':

1568

1716

attrname = request[1]

1569

1717

if callable(client_object.__getattribute__(attrname)):

1570

1718

parent_pipe.send(('function',))

1571

1719

else:

1572

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

1720

parent_pipe.send(('data', client_object

1721

.__getattribute__(attrname)))

1573

1722

1574

1723

if command == 'setattr':

1575

1724

attrname = request[1]

1576

1725

value = request[2]

1577

1726

setattr(client_object, attrname, value)

1578

1727

1579

1728

return True

1580

1729

1581

1730

1612

1761

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

1613

1762

else:

1614

1763

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

1615

except (ValueError, IndexError), e:

1616

raise ValueError(e.message)

1764

except (ValueError, IndexError) as e:

1765

raise ValueError(*(e.args))

1617

1766

timevalue += delta

1618

1767

return timevalue

1619

1768

1672

1821

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

1673

1822

# Parsing of options, both command line and config file

1674

1823

1675

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

1676

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

1677

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

1678

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

1679

help="Address to listen for requests on")

1680

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

1681

help="Port number to receive requests on")

1682

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

1683

help="Run self-test")

1684

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

1685

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

1686

" terminal")

1687

parser.add_option("--debuglevel", type="string", metavar="LEVEL",

1688

help="Debug level for stdout output")

1689

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

1690

" priority string (see GnuTLS documentation)")

1691

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

1692

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

1693

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

1694

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

1695

help="Directory to search for configuration"

1696

" files")

1697

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

1698

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

1699

" system bus interface")

1700

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

1701

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

1702

options = parser.parse_args()[0]

1824

parser = argparse.ArgumentParser()

1825

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

1826

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

1827

help="show version number and exit")

1828

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

1829

help="Bind to interface IF")

1830

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

1831

help="Address to listen for requests on")

1832

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

1833

help="Port number to receive requests on")

1834

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

1835

help="Run self-test")

1836

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

1837

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

1838

" to terminal")

1839

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

1840

help="Debug level for stdout output")

1841

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

1842

" priority string (see GnuTLS documentation)")

1843

parser.add_argument("--servicename",

1844

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

1845

parser.add_argument("--configdir",

1846

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

1847

help="Directory to search for configuration"

1848

" files")

1849

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

1850

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

1851

" system bus interface")

1852

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

1853

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

1854

options = parser.parse_args()

1703

1855

1704

1856

if options.check:

1705

1857

import doctest

1757

1909

debuglevel = server_settings["debuglevel"]

1758

1910

use_dbus = server_settings["use_dbus"]

1759

1911

use_ipv6 = server_settings["use_ipv6"]

1760

1912

1761

1913

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

1762

1914

syslogger.setFormatter(logging.Formatter

1763

1915

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

1765

1917

% server_settings["servicename"]))

1766

1918

1767

1919

# Parse config file with clients

1768

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

1769

"interval": "5m",

1920

client_defaults = { "timeout": "5m",

1921

"extended_timeout": "15m",

1922

"interval": "2m",

1770

1923

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

1771

1924

"host": "",

1772

1925

"approval_delay": "0s",

1812

1965

try:

1813

1966

os.setgid(gid)

1814

1967

os.setuid(uid)

1815

except OSError, error:

1968

except OSError as error:

1816

1969

if error[0] != errno.EPERM:

1817

1970

raise error

1818

1971

1823

1976

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

1824

1977

syslogger.setLevel(level)

1825

1978

console.setLevel(level)

1826

1979

1827

1980

if debug:

1828

1981

# Enable all possible GnuTLS debugging

1829

1982

1860

2013

# End of Avahi example code

1861

2014

if use_dbus:

1862

2015

try:

1863

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

2016

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

1864

2017

bus, do_not_queue=True)

1865

except dbus.exceptions.NameExistsException, e:

2018

old_bus_name = (dbus.service.BusName

2019

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

2020

do_not_queue=True))

2021

except dbus.exceptions.NameExistsException as e:

1866

2022

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

1867

2023

use_dbus = False

1868

2024

server_settings["use_dbus"] = False

1880

2036

1881

2037

client_class = Client

1882

2038

if use_dbus:

1883

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

2039

client_class = functools.partial(ClientDBusTransitional,

2040

bus = bus)

1884

2041

def client_config_items(config, section):

1885

2042

special_settings = {

1886

2043

"approved_by_default":

1916

2073

del pidfilename

1917

2074

1918

2075

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

1919

2076

1920

2077

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

1921

2078

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

1922

2079

1925

2082

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

1926

2083

def __init__(self):

1927

2084

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

1928

_interface = "se.bsnet.fukt.Mandos"

2085

_interface = "se.recompile.Mandos"

1929

2086

1930

2087

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

1931

2088

def ClientAdded(self, objpath):

1973

2130

1974

2131

del _interface

1975

2132

1976

mandos_dbus_service = MandosDBusService()

2133

class MandosDBusServiceTransitional(MandosDBusService):

2134

__metaclass__ = AlternateDBusNamesMetaclass

2135

mandos_dbus_service = MandosDBusServiceTransitional()

1977

2136

1978

2137

def cleanup():

1979

2138

"Cleanup function; run on exit"

1980

2139

service.cleanup()

1981

2140

2141

multiprocessing.active_children()

1982

2142

while tcp_server.clients:

1983

2143

client = tcp_server.clients.pop()

1984

2144

if use_dbus:

1988

2148

client.disable(quiet=True)

1989

2149

if use_dbus:

1990

2150

# Emit D-Bus signal

1991

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2151

mandos_dbus_service.ClientRemoved(client

2152

.dbus_object_path,

1992

2153

client.name)

1993

2154

1994

2155

atexit.register(cleanup)

2018

2179

# From the Avahi example code

2019

2180

try:

2020

2181

service.activate()

2021

except dbus.exceptions.DBusException, error:

2182

except dbus.exceptions.DBusException as error:

2022

2183

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

2023

2184

cleanup()

2024

2185

sys.exit(1)

2031

2192

2032

2193

logger.debug("Starting main loop")

2033

2194

main_loop.run()

2034

except AvahiError, error:

2195

except AvahiError as error:

2035

2196

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

2036

2197

cleanup()

2037

2198

sys.exit(1)

2038

2199

except KeyboardInterrupt:

2039

2200

if debug:

2040

print >> sys.stderr

2201

print("", file=sys.stderr)

2041

2202

logger.debug("Server received KeyboardInterrupt")

2042

2203

logger.debug("Server exiting")

2043

2204

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

2044

2205

cleanup()

2045

2206

2207

2046

2208

if __name__ == '__main__':

2047

2209

main()