/mandos/trunk : revision 502.1.1

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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, with_statement, absolute_import

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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 logging

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import logging.handlers

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import pwd

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from contextlib import closing

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import contextlib

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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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SO_BINDTODEVICE = None

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version = "1.0.14"

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version = "1.3.1"

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logger = logging.Logger(u'mandos')

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

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u' %(message)s'))

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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u' %(levelname)s:'

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u' %(message)s'))

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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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: u'_mandos._tcp'.

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type: string; Example: '_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 = u"", host = u"", max_renames = 32768,

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.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(u"No suitable Zeroconf service name found"

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u" after %i retries, exiting.",

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError(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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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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syslogger.setFormatter(logging.Formatter

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

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

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

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

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% self.name))

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self.remove()

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self.add()

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

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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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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(u"Avahi state change: %i", state)

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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

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logger.debug("Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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

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

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unicode(error))

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raise AvahiGroupError(u"State changed: %s"

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raise AvahiGroupError("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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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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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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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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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(u"StateChanged",

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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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Attributes:

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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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_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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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_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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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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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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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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@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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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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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 _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.name = name

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if config is None:

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config = {}

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

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logger.debug("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[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"])),

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"rb")) as secfile:

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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.secret = secfile.read()

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else:

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

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

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% self.name)

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

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

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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[u"timeout"])

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

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

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self.extended_timeout = string_to_delta(config["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[u"checker"]

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self.checker_command = config["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"""

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

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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.last_enabled = datetime.datetime.utcnow()

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self.send_changedstate()

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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.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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def disable(self):

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def disable(self, quiet=True):

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"""Disable this client."""

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

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return 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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if not quiet:

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self.send_changedstate()

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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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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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

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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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self.stop_checker()

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if os.WIFEXITED(condition):

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exitstatus = os.WEXITSTATUS(condition)

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if exitstatus == 0:

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

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

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vars(self))

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self.checked_ok()

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else:

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

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

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vars(self))

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else:

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

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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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"""

459

if timeout is None:

460

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

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self.disable_initiator_tag = (gobject.timeout_add

384

(self.timeout_milliseconds(),

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(_timedelta_to_milliseconds(timeout),

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self.disable))

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def need_approval(self):

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self.last_approval_request = datetime.datetime.utcnow()

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def start_checker(self):

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

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# client would inevitably timeout, since no checker would get

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

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

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

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# is as it should be.

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

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# should be.

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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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else:

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if pid:

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

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logger.warning("Checker was a zombie")

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback(pid, status,

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self.current_checker_command)

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502

command = self.checker_command % self.host

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except TypeError:

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# Escape attributes for the shell

421

escaped_attrs = dict((key,

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re.escape(unicode(str(val),

423

errors=

424

u'replace')))

425

for key, val in

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vars(self).iteritems())

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escaped_attrs = dict(

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(attr,

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

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errors=

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'replace')))

510

for attr in

511

self.runtime_expansions)

512

427

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try:

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514

command = self.checker_command % escaped_attrs

429

except TypeError, error:

430

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

431

u' %s', self.checker_command, 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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519

self.current_checker_command = command

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520

try:

435

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

521

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

436

522

command, self.name)

437

523

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

438

524

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

440

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# always replaced by /dev/null.)

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self.checker = subprocess.Popen(command,

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close_fds=True,

443

shell=True, cwd=u"/")

529

shell=True, cwd="/")

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self.checker_callback_tag = (gobject.child_watch_add

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531

(self.checker.pid,

446

532

self.checker_callback,

451

537

if pid:

452

538

gobject.source_remove(self.checker_callback_tag)

453

539

self.checker_callback(pid, status, command)

454

except OSError, error:

455

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

540

except OSError as error:

541

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

456

542

error)

457

543

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

458

544

return True

462

548

if self.checker_callback_tag:

463

549

gobject.source_remove(self.checker_callback_tag)

464

550

self.checker_callback_tag = None

465

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

551

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

466

552

return

467

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

553

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

468

554

try:

469

555

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

470

#os.sleep(0.5)

556

#time.sleep(0.5)

471

557

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

472

558

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

473

except OSError, error:

559

except OSError as error:

474

560

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

475

561

raise

476

562

self.checker = None

477

478

def still_valid(self):

479

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

480

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

481

return False

482

now = datetime.datetime.utcnow()

483

if self.last_checked_ok is None:

484

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

485

else:

486

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

487

488

489

def dbus_service_property(dbus_interface, signature=u"v",

490

access=u"readwrite", byte_arrays=False):

563

564

565

def dbus_service_property(dbus_interface, signature="v",

566

access="readwrite", byte_arrays=False):

491

567

"""Decorators for marking methods of a DBusObjectWithProperties to

492

568

become properties on the D-Bus.

493

569

498

574

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

499

575

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

500

576

"""

577

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

578

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

579

if byte_arrays and signature != "ay":

580

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

581

" signature %r" % signature)

501

582

def decorator(func):

502

583

func._dbus_is_property = True

503

584

func._dbus_interface = dbus_interface

504

585

func._dbus_signature = signature

505

586

func._dbus_access = access

506

587

func._dbus_name = func.__name__

507

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

588

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

508

589

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

509

func._dbus_get_args_options = {u'byte_arrays': byte_arrays }

590

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

510

591

return func

511

592

return decorator

512

593

532

613

533

614

class DBusObjectWithProperties(dbus.service.Object):

534

615

"""A D-Bus object with properties.

535

616

536

617

Classes inheriting from this can use the dbus_service_property

537

618

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

538

619

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

540

621

541

622

@staticmethod

542

623

def _is_dbus_property(obj):

543

return getattr(obj, u"_dbus_is_property", False)

624

return getattr(obj, "_dbus_is_property", False)

544

625

545

626

def _get_all_dbus_properties(self):

546

627

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

554

635

property with the specified name and interface.

555

636

"""

556

637

for name in (property_name,

557

property_name + u"_dbus_property"):

638

property_name + "_dbus_property"):

558

639

prop = getattr(self, name, None)

559

640

if (prop is None

560

641

or not self._is_dbus_property(prop)

564

645

continue

565

646

return prop

566

647

# No such property

567

raise DBusPropertyNotFound(self.dbus_object_path + u":"

568

+ interface_name + u"."

648

raise DBusPropertyNotFound(self.dbus_object_path + ":"

649

+ interface_name + "."

569

650

+ property_name)

570

651

571

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

572

out_signature=u"v")

652

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

653

out_signature="v")

573

654

def Get(self, interface_name, property_name):

574

655

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

575

656

"""

576

657

prop = self._get_dbus_property(interface_name, property_name)

577

if prop._dbus_access == u"write":

658

if prop._dbus_access == "write":

578

659

raise DBusPropertyAccessException(property_name)

579

660

value = prop()

580

if not hasattr(value, u"variant_level"):

661

if not hasattr(value, "variant_level"):

581

662

return value

582

663

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

583

664

584

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

665

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

585

666

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

586

667

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

587

668

"""

588

669

prop = self._get_dbus_property(interface_name, property_name)

589

if prop._dbus_access == u"read":

670

if prop._dbus_access == "read":

590

671

raise DBusPropertyAccessException(property_name)

591

if prop._dbus_get_args_options[u"byte_arrays"]:

672

if prop._dbus_get_args_options["byte_arrays"]:

673

# The byte_arrays option is not supported yet on

674

# signatures other than "ay".

675

if prop._dbus_signature != "ay":

676

raise ValueError

592

677

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

593

678

for byte in value))

594

679

prop(value)

595

680

596

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

597

out_signature=u"a{sv}")

681

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

682

out_signature="a{sv}")

598

683

def GetAll(self, interface_name):

599

684

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

600

685

standard.

601

686

602

687

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

603

688

"""

604

689

all = {}

608

693

# Interface non-empty but did not match

609

694

continue

610

695

# Ignore write-only properties

611

if prop._dbus_access == u"write":

696

if prop._dbus_access == "write":

612

697

continue

613

698

value = prop()

614

if not hasattr(value, u"variant_level"):

699

if not hasattr(value, "variant_level"):

615

700

all[name] = value

616

701

continue

617

702

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

618

703

value.variant_level+1)

619

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

704

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

620

705

621

706

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

622

out_signature=u"s",

707

out_signature="s",

623

708

path_keyword='object_path',

624

709

connection_keyword='connection')

625

710

def Introspect(self, object_path, connection):

630

715

try:

631

716

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

632

717

def make_tag(document, name, prop):

633

e = document.createElement(u"property")

634

e.setAttribute(u"name", name)

635

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

636

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

718

e = document.createElement("property")

719

e.setAttribute("name", name)

720

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

721

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

637

722

return e

638

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

723

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

639

724

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

640

725

for name, prop

641

726

in self._get_all_dbus_properties()

642

727

if prop._dbus_interface

643

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

728

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

644

729

if_tag.appendChild(tag)

645

730

# Add the names to the return values for the

646

731

# "org.freedesktop.DBus.Properties" methods

647

if (if_tag.getAttribute(u"name")

648

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

649

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

650

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

651

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

652

if (arg.getAttribute(u"direction")

653

== u"out"):

654

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

655

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

656

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

657

if (arg.getAttribute(u"direction")

658

== u"out"):

659

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

660

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

732

if (if_tag.getAttribute("name")

733

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

734

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

735

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

736

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

737

if (arg.getAttribute("direction")

738

== "out"):

739

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

740

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

741

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

742

if (arg.getAttribute("direction")

743

== "out"):

744

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

745

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

661

746

document.unlink()

662

747

except (AttributeError, xml.dom.DOMException,

663

xml.parsers.expat.ExpatError), error:

664

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

748

xml.parsers.expat.ExpatError) as error:

749

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

665

750

error)

666

751

return xmlstring

667

752

668

753

754

def datetime_to_dbus (dt, variant_level=0):

755

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

756

if dt is None:

757

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

758

return dbus.String(dt.isoformat(),

759

variant_level=variant_level)

760

761

669

762

class ClientDBus(Client, DBusObjectWithProperties):

670

763

"""A Client class using D-Bus

671

764

673

766

dbus_object_path: dbus.ObjectPath

674

767

bus: dbus.SystemBus()

675

768

"""

769

770

runtime_expansions = (Client.runtime_expansions

771

+ ("dbus_object_path",))

772

676

773

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

677

774

678

775

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

776

self._approvals_pending = 0

679

777

self.bus = bus

680

778

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

681

779

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

682

780

# the D-Bus

781

client_object_name = unicode(self.name).translate(

782

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

783

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

683

784

self.dbus_object_path = (dbus.ObjectPath

684

(u"/clients/"

685

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

785

("/clients/" + client_object_name))

686

786

DBusObjectWithProperties.__init__(self, self.bus,

687

787

self.dbus_object_path)

688

689

@staticmethod

690

def _datetime_to_dbus(dt, variant_level=0):

691

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

692

return dbus.String(dt.isoformat(),

693

variant_level=variant_level)

694

695

def enable(self):

696

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

697

r = Client.enable(self)

698

if oldstate != self.enabled:

699

# Emit D-Bus signals

700

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

701

dbus.Boolean(True, variant_level=1))

702

self.PropertyChanged(

703

dbus.String(u"last_enabled"),

704

self._datetime_to_dbus(self.last_enabled,

705

variant_level=1))

706

return r

707

708

def disable(self, signal = True):

709

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

710

r = Client.disable(self)

711

if signal and oldstate != self.enabled:

712

# Emit D-Bus signal

713

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

714

dbus.Boolean(False, variant_level=1))

715

return r

788

789

def notifychangeproperty(transform_func,

790

dbus_name, type_func=lambda x: x,

791

variant_level=1):

792

""" Modify a variable so that its a property that announce its

793

changes to DBus.

794

transform_fun: Function that takes a value and transform it to

795

DBus type.

796

dbus_name: DBus name of the variable

797

type_func: Function that transform the value before sending it

798

to DBus

799

variant_level: DBus variant level. default: 1

800

"""

801

real_value = [None,]

802

def setter(self, value):

803

old_value = real_value[0]

804

real_value[0] = value

805

if hasattr(self, "dbus_object_path"):

806

if type_func(old_value) != type_func(real_value[0]):

807

dbus_value = transform_func(type_func(real_value[0]),

808

variant_level)

809

self.PropertyChanged(dbus.String(dbus_name),

810

dbus_value)

811

812

return property(lambda self: real_value[0], setter)

813

814

815

expires = notifychangeproperty(datetime_to_dbus, "Expires")

816

approvals_pending = notifychangeproperty(dbus.Boolean,

817

"ApprovalPending",

818

type_func = bool)

819

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

820

last_enabled = notifychangeproperty(datetime_to_dbus,

821

"LastEnabled")

822

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

823

type_func = lambda checker: checker is not None)

824

last_checked_ok = notifychangeproperty(datetime_to_dbus,

825

"LastCheckedOK")

826

last_approval_request = notifychangeproperty(datetime_to_dbus,

827

"LastApprovalRequest")

828

approved_by_default = notifychangeproperty(dbus.Boolean,

829

"ApprovedByDefault")

830

approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",

831

type_func = _timedelta_to_milliseconds)

832

approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",

833

type_func = _timedelta_to_milliseconds)

834

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

835

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

836

type_func = _timedelta_to_milliseconds)

837

extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",

838

type_func = _timedelta_to_milliseconds)

839

interval = notifychangeproperty(dbus.UInt16, "Interval",

840

type_func = _timedelta_to_milliseconds)

841

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

842

843

del notifychangeproperty

716

844

717

845

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

718

846

try:

719

847

self.remove_from_connection()

720

848

except LookupError:

721

849

pass

722

if hasattr(DBusObjectWithProperties, u"__del__"):

850

if hasattr(DBusObjectWithProperties, "__del__"):

723

851

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

724

852

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

725

853

727

855

*args, **kwargs):

728

856

self.checker_callback_tag = None

729

857

self.checker = None

730

# Emit D-Bus signal

731

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

732

dbus.Boolean(False, variant_level=1))

733

858

if os.WIFEXITED(condition):

734

859

exitstatus = os.WEXITSTATUS(condition)

735

860

# Emit D-Bus signal

745

870

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

746

871

*args, **kwargs)

747

872

748

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

749

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

750

# Emit D-Bus signal

751

self.PropertyChanged(

752

dbus.String(u"last_checked_ok"),

753

(self._datetime_to_dbus(self.last_checked_ok,

754

variant_level=1)))

755

return r

756

757

873

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

758

874

old_checker = self.checker

759

875

if self.checker is not None:

766

882

and old_checker_pid != self.checker.pid):

767

883

# Emit D-Bus signal

768

884

self.CheckerStarted(self.current_checker_command)

769

self.PropertyChanged(

770

dbus.String(u"checker_running"),

771

dbus.Boolean(True, variant_level=1))

772

return r

773

774

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

775

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

776

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

777

if (old_checker is not None

778

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

779

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

780

dbus.Boolean(False, variant_level=1))

781

return r

782

783

## D-Bus methods & signals

784

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

785

786

# CheckedOK - method

787

@dbus.service.method(_interface)

788

def CheckedOK(self):

789

return self.checked_ok()

885

return r

886

887

def _reset_approved(self):

888

self._approved = None

889

return False

890

891

def approve(self, value=True):

892

self.send_changedstate()

893

self._approved = value

894

gobject.timeout_add(_timedelta_to_milliseconds

895

(self.approval_duration),

896

self._reset_approved)

897

898

899

## D-Bus methods, signals & properties

900

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

901

902

## Signals

790

903

791

904

# CheckerCompleted - signal

792

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

905

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

793

906

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

794

907

"D-Bus signal"

795

908

pass

796

909

797

910

# CheckerStarted - signal

798

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

911

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

799

912

def CheckerStarted(self, command):

800

913

"D-Bus signal"

801

914

pass

802

915

803

916

# PropertyChanged - signal

804

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

917

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

805

918

def PropertyChanged(self, property, value):

806

919

"D-Bus signal"

807

920

pass

809

922

# GotSecret - signal

810

923

@dbus.service.signal(_interface)

811

924

def GotSecret(self):

812

"D-Bus signal"

925

"""D-Bus signal

926

Is sent after a successful transfer of secret from the Mandos

927

server to mandos-client

928

"""

813

929

pass

814

930

815

931

# Rejected - signal

816

@dbus.service.signal(_interface)

817

def Rejected(self):

932

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

933

def Rejected(self, reason):

818

934

"D-Bus signal"

819

935

pass

820

936

937

# NeedApproval - signal

938

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

939

def NeedApproval(self, timeout, default):

940

"D-Bus signal"

941

return self.need_approval()

942

943

## Methods

944

945

# Approve - method

946

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

947

def Approve(self, value):

948

self.approve(value)

949

950

# CheckedOK - method

951

@dbus.service.method(_interface)

952

def CheckedOK(self):

953

self.checked_ok()

954

821

955

# Enable - method

822

956

@dbus.service.method(_interface)

823

957

def Enable(self):

841

975

def StopChecker(self):

842

976

self.stop_checker()

843

977

844

# name - property

845

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

846

def name_dbus_property(self):

978

## Properties

979

980

# ApprovalPending - property

981

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

982

def ApprovalPending_dbus_property(self):

983

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

984

985

# ApprovedByDefault - property

986

@dbus_service_property(_interface, signature="b",

987

access="readwrite")

988

def ApprovedByDefault_dbus_property(self, value=None):

989

if value is None: # get

990

return dbus.Boolean(self.approved_by_default)

991

self.approved_by_default = bool(value)

992

993

# ApprovalDelay - property

994

@dbus_service_property(_interface, signature="t",

995

access="readwrite")

996

def ApprovalDelay_dbus_property(self, value=None):

997

if value is None: # get

998

return dbus.UInt64(self.approval_delay_milliseconds())

999

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

1000

1001

# ApprovalDuration - property

1002

@dbus_service_property(_interface, signature="t",

1003

access="readwrite")

1004

def ApprovalDuration_dbus_property(self, value=None):

1005

if value is None: # get

1006

return dbus.UInt64(_timedelta_to_milliseconds(

1007

self.approval_duration))

1008

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

1009

1010

# Name - property

1011

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

1012

def Name_dbus_property(self):

847

1013

return dbus.String(self.name)

848

1014

849

# fingerprint - property

850

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

851

def fingerprint_dbus_property(self):

1015

# Fingerprint - property

1016

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

1017

def Fingerprint_dbus_property(self):

852

1018

return dbus.String(self.fingerprint)

853

1019

854

# host - property

855

@dbus_service_property(_interface, signature=u"s",

856

access=u"readwrite")

857

def host_dbus_property(self, value=None):

1020

# Host - property

1021

@dbus_service_property(_interface, signature="s",

1022

access="readwrite")

1023

def Host_dbus_property(self, value=None):

858

1024

if value is None: # get

859

1025

return dbus.String(self.host)

860

1026

self.host = value

861

# Emit D-Bus signal

862

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

863

dbus.String(value, variant_level=1))

864

865

# created - property

866

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

867

def created_dbus_property(self):

868

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

869

870

# last_enabled - property

871

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

872

def last_enabled_dbus_property(self):

873

if self.last_enabled is None:

874

return dbus.String(u"")

875

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

876

877

# enabled - property

878

@dbus_service_property(_interface, signature=u"b",

879

access=u"readwrite")

880

def enabled_dbus_property(self, value=None):

1027

1028

# Created - property

1029

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

1030

def Created_dbus_property(self):

1031

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

1032

1033

# LastEnabled - property

1034

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

1035

def LastEnabled_dbus_property(self):

1036

return datetime_to_dbus(self.last_enabled)

1037

1038

# Enabled - property

1039

@dbus_service_property(_interface, signature="b",

1040

access="readwrite")

1041

def Enabled_dbus_property(self, value=None):

881

1042

if value is None: # get

882

1043

return dbus.Boolean(self.enabled)

883

1044

if value:

885

1046

else:

886

1047

self.disable()

887

1048

888

# last_checked_ok - property

889

@dbus_service_property(_interface, signature=u"s",

890

access=u"readwrite")

891

def last_checked_ok_dbus_property(self, value=None):

1049

# LastCheckedOK - property

1050

@dbus_service_property(_interface, signature="s",

1051

access="readwrite")

1052

def LastCheckedOK_dbus_property(self, value=None):

892

1053

if value is not None:

893

1054

self.checked_ok()

894

1055

return

895

if self.last_checked_ok is None:

896

return dbus.String(u"")

897

return dbus.String(self._datetime_to_dbus(self

898

.last_checked_ok))

899

900

# timeout - property

901

@dbus_service_property(_interface, signature=u"t",

902

access=u"readwrite")

903

def timeout_dbus_property(self, value=None):

1056

return datetime_to_dbus(self.last_checked_ok)

1057

1058

# Expires - property

1059

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

1060

def Expires_dbus_property(self):

1061

return datetime_to_dbus(self.expires)

1062

1063

# LastApprovalRequest - property

1064

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

1065

def LastApprovalRequest_dbus_property(self):

1066

return datetime_to_dbus(self.last_approval_request)

1067

1068

# Timeout - property

1069

@dbus_service_property(_interface, signature="t",

1070

access="readwrite")

1071

def Timeout_dbus_property(self, value=None):

904

1072

if value is None: # get

905

1073

return dbus.UInt64(self.timeout_milliseconds())

906

1074

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

907

# Emit D-Bus signal

908

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

909

dbus.UInt64(value, variant_level=1))

910

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

1075

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

911

1076

return

912

1077

# Reschedule timeout

913

1078

gobject.source_remove(self.disable_initiator_tag)

914

1079

self.disable_initiator_tag = None

1080

self.expires = None

915

1081

time_to_die = (self.

916

1082

_timedelta_to_milliseconds((self

917

1083

.last_checked_ok

922

1088

# The timeout has passed

923

1089

self.disable()

924

1090

else:

1091

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

1092

+ datetime.timedelta(milliseconds = time_to_die))

925

1093

self.disable_initiator_tag = (gobject.timeout_add

926

1094

(time_to_die, self.disable))

927

1095

928

# interval - property

929

@dbus_service_property(_interface, signature=u"t",

930

access=u"readwrite")

931

def interval_dbus_property(self, value=None):

1096

# ExtendedTimeout - property

1097

@dbus_service_property(_interface, signature="t",

1098

access="readwrite")

1099

def ExtendedTimeout_dbus_property(self, value=None):

1100

if value is None: # get

1101

return dbus.UInt64(self.extended_timeout_milliseconds())

1102

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

1103

1104

# Interval - property

1105

@dbus_service_property(_interface, signature="t",

1106

access="readwrite")

1107

def Interval_dbus_property(self, value=None):

932

1108

if value is None: # get

933

1109

return dbus.UInt64(self.interval_milliseconds())

934

1110

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

935

# Emit D-Bus signal

936

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

937

dbus.UInt64(value, variant_level=1))

938

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

1111

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

939

1112

return

940

1113

# Reschedule checker run

941

1114

gobject.source_remove(self.checker_initiator_tag)

942

1115

self.checker_initiator_tag = (gobject.timeout_add

943

1116

(value, self.start_checker))

944

1117

self.start_checker() # Start one now, too

945

946

# checker - property

947

@dbus_service_property(_interface, signature=u"s",

948

access=u"readwrite")

949

def checker_dbus_property(self, value=None):

1118

1119

# Checker - property

1120

@dbus_service_property(_interface, signature="s",

1121

access="readwrite")

1122

def Checker_dbus_property(self, value=None):

950

1123

if value is None: # get

951

1124

return dbus.String(self.checker_command)

952

1125

self.checker_command = value

953

# Emit D-Bus signal

954

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

955

dbus.String(self.checker_command,

956

variant_level=1))

957

1126

958

# checker_running - property

959

@dbus_service_property(_interface, signature=u"b",

960

access=u"readwrite")

961

def checker_running_dbus_property(self, value=None):

1127

# CheckerRunning - property

1128

@dbus_service_property(_interface, signature="b",

1129

access="readwrite")

1130

def CheckerRunning_dbus_property(self, value=None):

962

1131

if value is None: # get

963

1132

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

964

1133

if value:

966

1135

else:

967

1136

self.stop_checker()

968

1137

969

# object_path - property

970

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

971

def object_path_dbus_property(self):

1138

# ObjectPath - property

1139

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

1140

def ObjectPath_dbus_property(self):

972

1141

return self.dbus_object_path # is already a dbus.ObjectPath

973

1142

974

# secret = property

975

@dbus_service_property(_interface, signature=u"ay",

976

access=u"write", byte_arrays=True)

977

def secret_dbus_property(self, value):

1143

# Secret = property

1144

@dbus_service_property(_interface, signature="ay",

1145

access="write", byte_arrays=True)

1146

def Secret_dbus_property(self, value):

978

1147

self.secret = str(value)

979

1148

980

1149

del _interface

981

1150

982

1151

1152

class ProxyClient(object):

1153

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

1154

self._pipe = child_pipe

1155

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

1156

if not self._pipe.recv():

1157

raise KeyError()

1158

1159

def __getattribute__(self, name):

1160

if(name == '_pipe'):

1161

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

1162

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

1163

data = self._pipe.recv()

1164

if data[0] == 'data':

1165

return data[1]

1166

if data[0] == 'function':

1167

def func(*args, **kwargs):

1168

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

1169

return self._pipe.recv()[1]

1170

return func

1171

1172

def __setattr__(self, name, value):

1173

if(name == '_pipe'):

1174

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

1175

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

1176

1177

983

1178

class ClientHandler(socketserver.BaseRequestHandler, object):

984

1179

"""A class to handle client connections.

985

1180

987

1182

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

988

1183

989

1184

def handle(self):

990

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

991

unicode(self.client_address))

992

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

993

# Open IPC pipe to parent process

994

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

1185

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

1186

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

1187

unicode(self.client_address))

1188

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

1189

self.server.child_pipe.fileno())

1190

995

1191

session = (gnutls.connection

996

1192

.ClientSession(self.request,

997

1193

gnutls.connection

998

1194

.X509Credentials()))

999

1195

1000

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

1001

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

1002

try:

1003

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

1004

raise RuntimeError

1005

except (ValueError, IndexError, RuntimeError), error:

1006

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

1007

return

1008

1009

1196

# Note: gnutls.connection.X509Credentials is really a

1010

1197

# generic GnuTLS certificate credentials object so long as

1011

1198

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

1012

1199

# here despite using OpenPGP certificates.

1013

1200

1014

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

1015

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

1016

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

1017

# u"+DHE-DSS"))

1201

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

1202

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

1203

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

1204

# "+DHE-DSS"))

1018

1205

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

1019

1206

priority = self.server.gnutls_priority

1020

1207

if priority is None:

1021

priority = u"NORMAL"

1208

priority = "NORMAL"

1022

1209

(gnutls.library.functions

1023

1210

.gnutls_priority_set_direct(session._c_object,

1024

1211

priority, None))

1025

1212

1213

# Start communication using the Mandos protocol

1214

# Get protocol number

1215

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

1216

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

1217

try:

1218

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

1219

raise RuntimeError

1220

except (ValueError, IndexError, RuntimeError) as error:

1221

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

1222

return

1223

1224

# Start GnuTLS connection

1026

1225

try:

1027

1226

session.handshake()

1028

except gnutls.errors.GNUTLSError, error:

1029

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

1227

except gnutls.errors.GNUTLSError as error:

1228

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

1030

1229

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

1031

1230

# established. Just abandon the request.

1032

1231

return

1033

logger.debug(u"Handshake succeeded")

1232

logger.debug("Handshake succeeded")

1233

1234

approval_required = False

1034

1235

try:

1035

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

1036

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

1037

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

1038

session.bye()

1039

return

1040

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

1236

try:

1237

fpr = self.fingerprint(self.peer_certificate

1238

(session))

1239

except (TypeError,

1240

gnutls.errors.GNUTLSError) as error:

1241

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

1242

return

1243

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

1244

1245

try:

1246

client = ProxyClient(child_pipe, fpr,

1247

self.client_address)

1248

except KeyError:

1249

return

1250

1251

if client.approval_delay:

1252

delay = client.approval_delay

1253

client.approvals_pending += 1

1254

approval_required = True

1255

1256

while True:

1257

if not client.enabled:

1258

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

1259

client.name)

1260

if self.server.use_dbus:

1261

# Emit D-Bus signal

1262

client.Rejected("Disabled")

1263

return

1264

1265

if client._approved or not client.approval_delay:

1266

#We are approved or approval is disabled

1267

break

1268

elif client._approved is None:

1269

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

1270

client.name)

1271

if self.server.use_dbus:

1272

# Emit D-Bus signal

1273

client.NeedApproval(

1274

client.approval_delay_milliseconds(),

1275

client.approved_by_default)

1276

else:

1277

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

1278

client.name)

1279

if self.server.use_dbus:

1280

# Emit D-Bus signal

1281

client.Rejected("Denied")

1282

return

1283

1284

#wait until timeout or approved

1285

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

1286

time = datetime.datetime.now()

1287

client.changedstate.acquire()

1288

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

1289

client.changedstate.release()

1290

time2 = datetime.datetime.now()

1291

if (time2 - time) >= delay:

1292

if not client.approved_by_default:

1293

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

1294

" waiting for approval",

1295

client.name)

1296

if self.server.use_dbus:

1297

# Emit D-Bus signal

1298

client.Rejected("Approval timed out")

1299

return

1300

else:

1301

break

1302

else:

1303

delay -= time2 - time

1304

1305

sent_size = 0

1306

while sent_size < len(client.secret):

1307

try:

1308

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

1309

except gnutls.errors.GNUTLSError as error:

1310

logger.warning("gnutls send failed")

1311

return

1312

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

1313

sent, len(client.secret)

1314

- (sent_size + sent))

1315

sent_size += sent

1316

1317

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

1318

# bump the timeout as if seen

1319

client.checked_ok(client.extended_timeout)

1320

if self.server.use_dbus:

1321

# Emit D-Bus signal

1322

client.GotSecret()

1041

1323

1042

for c in self.server.clients:

1043

if c.fingerprint == fpr:

1044

client = c

1045

break

1046

else:

1047

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

1048

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

1049

session.bye()

1050

return

1051

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

1052

# possible that the client timed out while establishing

1053

# the GnuTLS session.

1054

if not client.still_valid():

1055

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

1056

session.bye()

1057

return

1058

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

1059

sent_size = 0

1060

while sent_size < len(client.secret):

1061

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

1062

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

1063

sent, len(client.secret)

1064

- (sent_size + sent))

1065

sent_size += sent

1066

session.bye()

1324

finally:

1325

if approval_required:

1326

client.approvals_pending -= 1

1327

try:

1328

session.bye()

1329

except gnutls.errors.GNUTLSError as error:

1330

logger.warning("GnuTLS bye failed")

1067

1331

1068

1332

@staticmethod

1069

1333

def peer_certificate(session):

1079

1343

.gnutls_certificate_get_peers

1080

1344

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

1081

1345

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

1082

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

1083

u" certificate")

1346

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

1347

" certificate")

1084

1348

if list_size.value == 0:

1085

1349

return None

1086

1350

cert = cert_list[0]

1112

1376

if crtverify.value != 0:

1113

1377

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1114

1378

raise (gnutls.errors.CertificateSecurityError

1115

(u"Verify failed"))

1379

("Verify failed"))

1116

1380

# New buffer for the fingerprint

1117

1381

buf = ctypes.create_string_buffer(20)

1118

1382

buf_len = ctypes.c_size_t()

1125

1389

# Convert the buffer to a Python bytestring

1126

1390

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

1127

1391

# Convert the bytestring to hexadecimal notation

1128

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

1392

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

1129

1393

return hex_fpr

1130

1394

1131

1395

1132

class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):

1133

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

1396

class MultiprocessingMixIn(object):

1397

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

1398

def sub_process_main(self, request, address):

1399

try:

1400

self.finish_request(request, address)

1401

except:

1402

self.handle_error(request, address)

1403

self.close_request(request)

1404

1405

def process_request(self, request, address):

1406

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

1407

multiprocessing.Process(target = self.sub_process_main,

1408

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

1409

1410

1411

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1412

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

1134

1413

def process_request(self, request, client_address):

1135

1414

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

1136

1415

1137

1416

This function creates a new pipe in self.pipe

1138

1417

"""

1139

self.pipe = os.pipe()

1140

super(ForkingMixInWithPipe,

1418

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1419

1420

super(MultiprocessingMixInWithPipe,

1141

1421

self).process_request(request, client_address)

1142

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

1143

self.add_pipe(self.pipe[0])

1144

def add_pipe(self, pipe):

1422

self.child_pipe.close()

1423

self.add_pipe(parent_pipe)

1424

1425

def add_pipe(self, parent_pipe):

1145

1426

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

1146

os.close(pipe)

1147

1148

1149

class IPv6_TCPServer(ForkingMixInWithPipe,

1427

raise NotImplementedError

1428

1429

1430

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1150

1431

socketserver.TCPServer, object):

1151

1432

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

1152

1433

1168

1449

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

1169

1450

if self.interface is not None:

1170

1451

if SO_BINDTODEVICE is None:

1171

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

1172

u" cannot bind to interface %s",

1452

logger.error("SO_BINDTODEVICE does not exist;"

1453

" cannot bind to interface %s",

1173

1454

self.interface)

1174

1455

else:

1175

1456

try:

1176

1457

self.socket.setsockopt(socket.SOL_SOCKET,

1177

1458

SO_BINDTODEVICE,

1178

1459

str(self.interface

1179

+ u'\0'))

1180

except socket.error, error:

1460

+ '\0'))

1461

except socket.error as error:

1181

1462

if error[0] == errno.EPERM:

1182

logger.error(u"No permission to"

1183

u" bind to interface %s",

1463

logger.error("No permission to"

1464

" bind to interface %s",

1184

1465

self.interface)

1185

1466

elif error[0] == errno.ENOPROTOOPT:

1186

logger.error(u"SO_BINDTODEVICE not available;"

1187

u" cannot bind to interface %s",

1467

logger.error("SO_BINDTODEVICE not available;"

1468

" cannot bind to interface %s",

1188

1469

self.interface)

1189

1470

else:

1190

1471

raise

1192

1473

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

1193

1474

if not self.server_address[0]:

1194

1475

if self.address_family == socket.AF_INET6:

1195

any_address = u"::" # in6addr_any

1476

any_address = "::" # in6addr_any

1196

1477

else:

1197

1478

any_address = socket.INADDR_ANY

1198

1479

self.server_address = (any_address,

1237

1518

return socketserver.TCPServer.server_activate(self)

1238

1519

def enable(self):

1239

1520

self.enabled = True

1240

def add_pipe(self, pipe):

1521

def add_pipe(self, parent_pipe):

1241

1522

# Call "handle_ipc" for both data and EOF events

1242

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

1243

self.handle_ipc)

1244

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

1523

gobject.io_add_watch(parent_pipe.fileno(),

1524

gobject.IO_IN | gobject.IO_HUP,

1525

functools.partial(self.handle_ipc,

1526

parent_pipe = parent_pipe))

1527

1528

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

1529

client_object=None):

1245

1530

condition_names = {

1246

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

1247

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

1531

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

1532

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

1248

1533

# blocking).

1249

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

1250

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

1251

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

1534

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

1535

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

1536

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

1252

1537

# broken, usually for pipes and

1253

1538

# sockets).

1254

1539

}

1256

1541

for cond, name in

1257

1542

condition_names.iteritems()

1258

1543

if cond & condition)

1259

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

1260

conditions_string)

1261

1262

# Turn the pipe file descriptor into a Python file object

1263

if source not in file_objects:

1264

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

1265

1266

# Read a line from the file object

1267

cmdline = file_objects[source].readline()

1268

if not cmdline: # Empty line means end of file

1269

# close the IPC pipe

1270

file_objects[source].close()

1271

del file_objects[source]

1272

1273

# Stop calling this function

1274

return False

1275

1276

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

1277

1278

# Parse and act on command

1279

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

1280

1281

if cmd == u"NOTFOUND":

1282

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

1283

args)

1284

if self.use_dbus:

1285

# Emit D-Bus signal

1286

mandos_dbus_service.ClientNotFound(args)

1287

elif cmd == u"INVALID":

1288

for client in self.clients:

1289

if client.name == args:

1290

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

1291

if self.use_dbus:

1292

# Emit D-Bus signal

1293

client.Rejected()

1294

break

1295

else:

1296

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

1297

elif cmd == u"SENDING":

1298

for client in self.clients:

1299

if client.name == args:

1300

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

1301

client.checked_ok()

1302

if self.use_dbus:

1303

# Emit D-Bus signal

1304

client.GotSecret()

1305

break

1306

else:

1307

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

1308

args)

1309

else:

1310

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

1311

1312

# Keep calling this function

1544

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

1545

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

1546

return False

1547

1548

# Read a request from the child

1549

request = parent_pipe.recv()

1550

command = request[0]

1551

1552

if command == 'init':

1553

fpr = request[1]

1554

address = request[2]

1555

1556

for c in self.clients:

1557

if c.fingerprint == fpr:

1558

client = c

1559

break

1560

else:

1561

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

1562

"dress: %s", fpr, address)

1563

if self.use_dbus:

1564

# Emit D-Bus signal

1565

mandos_dbus_service.ClientNotFound(fpr, address[0])

1566

parent_pipe.send(False)

1567

return False

1568

1569

gobject.io_add_watch(parent_pipe.fileno(),

1570

gobject.IO_IN | gobject.IO_HUP,

1571

functools.partial(self.handle_ipc,

1572

parent_pipe = parent_pipe,

1573

client_object = client))

1574

parent_pipe.send(True)

1575

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

1576

return False

1577

if command == 'funcall':

1578

funcname = request[1]

1579

args = request[2]

1580

kwargs = request[3]

1581

1582

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

1583

1584

if command == 'getattr':

1585

attrname = request[1]

1586

if callable(client_object.__getattribute__(attrname)):

1587

parent_pipe.send(('function',))

1588

else:

1589

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

1590

1591

if command == 'setattr':

1592

attrname = request[1]

1593

value = request[2]

1594

setattr(client_object, attrname, value)

1595

1313

1596

return True

1314

1597

1315

1598

1316

1599

def string_to_delta(interval):

1317

1600

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

1318

1601

1319

>>> string_to_delta(u'7d')

1602

>>> string_to_delta('7d')

1320

1603

datetime.timedelta(7)

1321

>>> string_to_delta(u'60s')

1604

>>> string_to_delta('60s')

1322

1605

datetime.timedelta(0, 60)

1323

>>> string_to_delta(u'60m')

1606

>>> string_to_delta('60m')

1324

1607

datetime.timedelta(0, 3600)

1325

>>> string_to_delta(u'24h')

1608

>>> string_to_delta('24h')

1326

1609

datetime.timedelta(1)

1327

>>> string_to_delta(u'1w')

1610

>>> string_to_delta('1w')

1328

1611

datetime.timedelta(7)

1329

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

1612

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

1330

1613

datetime.timedelta(0, 330)

1331

1614

"""

1332

1615

timevalue = datetime.timedelta(0)

1334

1617

try:

1335

1618

suffix = unicode(s[-1])

1336

1619

value = int(s[:-1])

1337

if suffix == u"d":

1620

if suffix == "d":

1338

1621

delta = datetime.timedelta(value)

1339

elif suffix == u"s":

1622

elif suffix == "s":

1340

1623

delta = datetime.timedelta(0, value)

1341

elif suffix == u"m":

1624

elif suffix == "m":

1342

1625

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

1343

elif suffix == u"h":

1626

elif suffix == "h":

1344

1627

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

1345

elif suffix == u"w":

1628

elif suffix == "w":

1346

1629

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

1347

1630

else:

1348

raise ValueError

1349

except (ValueError, IndexError):

1350

raise ValueError

1631

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

1632

except (ValueError, IndexError) as e:

1633

raise ValueError(*(e.args))

1351

1634

timevalue += delta

1352

1635

return timevalue

1353

1636

1359

1642

global if_nametoindex

1360

1643

try:

1361

1644

if_nametoindex = (ctypes.cdll.LoadLibrary

1362

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

1645

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

1363

1646

.if_nametoindex)

1364

1647

except (OSError, AttributeError):

1365

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

1648

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

1366

1649

def if_nametoindex(interface):

1367

1650

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

1368

1651

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

1369

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

1652

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

1370

1653

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1371

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

1654

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

1372

1655

interface))

1373

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

1656

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

1374

1657

ifreq[16:20])[0]

1375

1658

return interface_index

1376

1659

return if_nametoindex(interface)

1384

1667

sys.exit()

1385

1668

os.setsid()

1386

1669

if not nochdir:

1387

os.chdir(u"/")

1670

os.chdir("/")

1388

1671

if os.fork():

1389

1672

sys.exit()

1390

1673

if not noclose:

1392

1675

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

1393

1676

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

1394

1677

raise OSError(errno.ENODEV,

1395

u"%s not a character device"

1678

"%s not a character device"

1396

1679

% os.path.devnull)

1397

1680

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

1398

1681

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

1406

1689

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

1407

1690

# Parsing of options, both command line and config file

1408

1691

1409

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

1410

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

1411

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

1412

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

1413

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

1414

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

1415

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

1416

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

1417

help=u"Run self-test")

1418

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

1419

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

1420

u" terminal")

1421

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

1422

u" priority string (see GnuTLS documentation)")

1423

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

1424

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

1425

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

1426

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

1427

help=u"Directory to search for configuration"

1428

u" files")

1429

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

1430

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

1431

u" system bus interface")

1432

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

1433

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

1434

options = parser.parse_args()[0]

1692

parser = argparse.ArgumentParser()

1693

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

1694

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

1695

help="show version number and exit")

1696

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

1697

help="Bind to interface IF")

1698

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

1699

help="Address to listen for requests on")

1700

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

1701

help="Port number to receive requests on")

1702

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

1703

help="Run self-test")

1704

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

1705

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

1706

" to terminal")

1707

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

1708

help="Debug level for stdout output")

1709

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

1710

" priority string (see GnuTLS documentation)")

1711

parser.add_argument("--servicename",

1712

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

1713

parser.add_argument("--configdir",

1714

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

1715

help="Directory to search for configuration"

1716

" files")

1717

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

1718

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

1719

" system bus interface")

1720

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

1721

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

1722

options = parser.parse_args()

1435

1723

1436

1724

if options.check:

1437

1725

import doctest

1439

1727

sys.exit()

1440

1728

1441

1729

# Default values for config file for server-global settings

1442

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

1443

u"address": u"",

1444

u"port": u"",

1445

u"debug": u"False",

1446

u"priority":

1447

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

1448

u"servicename": u"Mandos",

1449

u"use_dbus": u"True",

1450

u"use_ipv6": u"True",

1730

server_defaults = { "interface": "",

1731

"address": "",

1732

"port": "",

1733

"debug": "False",

1734

"priority":

1735

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

1736

"servicename": "Mandos",

1737

"use_dbus": "True",

1738

"use_ipv6": "True",

1739

"debuglevel": "",

1451

1740

}

1452

1741

1453

1742

# Parse config file for server-global settings

1454

1743

server_config = configparser.SafeConfigParser(server_defaults)

1455

1744

del server_defaults

1456

1745

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

1457

u"mandos.conf"))

1746

"mandos.conf"))

1458

1747

# Convert the SafeConfigParser object to a dict

1459

1748

server_settings = server_config.defaults()

1460

1749

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

1461

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

1462

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

1750

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

1751

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

1463

1752

option)

1464

1753

if server_settings["port"]:

1465

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

1466

u"port")

1754

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

1755

"port")

1467

1756

del server_config

1468

1757

1469

1758

# Override the settings from the config file with command line

1470

1759

# options, if set.

1471

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

1472

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

1473

u"use_dbus", u"use_ipv6"):

1760

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

1761

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

1762

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

1474

1763

value = getattr(options, option)

1475

1764

if value is not None:

1476

1765

server_settings[option] = value

1484

1773

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

1485

1774

1486

1775

# For convenience

1487

debug = server_settings[u"debug"]

1488

use_dbus = server_settings[u"use_dbus"]

1489

use_ipv6 = server_settings[u"use_ipv6"]

1490

1491

if not debug:

1492

syslogger.setLevel(logging.WARNING)

1493

console.setLevel(logging.WARNING)

1494

1495

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

1776

debug = server_settings["debug"]

1777

debuglevel = server_settings["debuglevel"]

1778

use_dbus = server_settings["use_dbus"]

1779

use_ipv6 = server_settings["use_ipv6"]

1780

1781

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

1496

1782

syslogger.setFormatter(logging.Formatter

1497

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

1498

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

1499

% server_settings[u"servicename"]))

1783

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

1784

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

1785

% server_settings["servicename"]))

1500

1786

1501

1787

# Parse config file with clients

1502

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

1503

u"interval": u"5m",

1504

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

1505

u"host": u"",

1788

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

1789

"extended_timeout": "15m",

1790

"interval": "2m",

1791

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

1792

"host": "",

1793

"approval_delay": "0s",

1794

"approval_duration": "1s",

1506

1795

}

1507

1796

client_config = configparser.SafeConfigParser(client_defaults)

1508

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

1509

u"clients.conf"))

1797

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

1798

"clients.conf"))

1510

1799

1511

1800

global mandos_dbus_service

1512

1801

mandos_dbus_service = None

1513

1802

1514

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

1515

server_settings[u"port"]),

1803

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

1804

server_settings["port"]),

1516

1805

ClientHandler,

1517

interface=server_settings[u"interface"],

1806

interface=(server_settings["interface"]

1807

or None),

1518

1808

use_ipv6=use_ipv6,

1519

1809

gnutls_priority=

1520

server_settings[u"priority"],

1810

server_settings["priority"],

1521

1811

use_dbus=use_dbus)

1522

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

1523

try:

1524

pidfile = open(pidfilename, u"w")

1525

except IOError:

1526

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

1812

if not debug:

1813

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

1814

try:

1815

pidfile = open(pidfilename, "w")

1816

except IOError:

1817

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

1527

1818

1528

1819

try:

1529

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

1530

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

1820

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

1821

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

1531

1822

except KeyError:

1532

1823

try:

1533

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

1534

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

1824

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

1825

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

1535

1826

except KeyError:

1536

1827

try:

1537

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

1538

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

1828

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

1829

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

1539

1830

except KeyError:

1540

1831

uid = 65534

1541

1832

gid = 65534

1542

1833

try:

1543

1834

os.setgid(gid)

1544

1835

os.setuid(uid)

1545

except OSError, error:

1836

except OSError as error:

1546

1837

if error[0] != errno.EPERM:

1547

1838

raise error

1548

1839

1549

# Enable all possible GnuTLS debugging

1840

if not debug and not debuglevel:

1841

syslogger.setLevel(logging.WARNING)

1842

console.setLevel(logging.WARNING)

1843

if debuglevel:

1844

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

1845

syslogger.setLevel(level)

1846

console.setLevel(level)

1847

1550

1848

if debug:

1849

# Enable all possible GnuTLS debugging

1850

1551

1851

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

1552

1852

# - GnuTLS manual

1553

1853

gnutls.library.functions.gnutls_global_set_log_level(11)

1554

1854

1555

1855

@gnutls.library.types.gnutls_log_func

1556

1856

def debug_gnutls(level, string):

1557

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

1857

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

1558

1858

1559

1859

(gnutls.library.functions

1560

1860

.gnutls_global_set_log_function(debug_gnutls))

1861

1862

# Redirect stdin so all checkers get /dev/null

1863

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

1864

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

1865

if null > 2:

1866

os.close(null)

1867

else:

1868

# No console logging

1869

logger.removeHandler(console)

1870

1871

# Need to fork before connecting to D-Bus

1872

if not debug:

1873

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

1874

daemon()

1561

1875

1562

1876

global main_loop

1563

1877

# From the Avahi example code

1566

1880

bus = dbus.SystemBus()

1567

1881

# End of Avahi example code

1568

1882

if use_dbus:

1569

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

1883

try:

1884

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

1885

bus, do_not_queue=True)

1886

except dbus.exceptions.NameExistsException as e:

1887

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

1888

use_dbus = False

1889

server_settings["use_dbus"] = False

1890

tcp_server.use_dbus = False

1570

1891

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1571

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

1572

servicetype = u"_mandos._tcp",

1892

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

1893

servicetype = "_mandos._tcp",

1573

1894

protocol = protocol, bus = bus)

1574

1895

if server_settings["interface"]:

1575

1896

service.interface = (if_nametoindex

1576

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

1897

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

1898

1899

global multiprocessing_manager

1900

multiprocessing_manager = multiprocessing.Manager()

1577

1901

1578

1902

client_class = Client

1579

1903

if use_dbus:

1580

1904

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

1905

def client_config_items(config, section):

1906

special_settings = {

1907

"approved_by_default":

1908

lambda: config.getboolean(section,

1909

"approved_by_default"),

1910

}

1911

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

1912

try:

1913

yield (name, special_settings[name]())

1914

except KeyError:

1915

yield (name, value)

1916

1581

1917

tcp_server.clients.update(set(

1582

1918

client_class(name = section,

1583

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

1919

config= dict(client_config_items(

1920

client_config, section)))

1584

1921

for section in client_config.sections()))

1585

1922

if not tcp_server.clients:

1586

logger.warning(u"No clients defined")

1587

1588

if debug:

1589

# Redirect stdin so all checkers get /dev/null

1590

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

1591

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

1592

if null > 2:

1593

os.close(null)

1594

else:

1595

# No console logging

1596

logger.removeHandler(console)

1597

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

1598

daemon()

1599

1600

try:

1601

with closing(pidfile):

1602

pid = os.getpid()

1603

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

1604

del pidfile

1605

except IOError:

1606

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

1607

pidfilename, pid)

1608

except NameError:

1609

# "pidfile" was never created

1610

pass

1611

del pidfilename

1612

1613

def cleanup():

1614

"Cleanup function; run on exit"

1615

service.cleanup()

1923

logger.warning("No clients defined")

1616

1924

1617

while tcp_server.clients:

1618

client = tcp_server.clients.pop()

1619

client.disable_hook = None

1620

client.disable()

1621

1622

atexit.register(cleanup)

1623

1624

1925

if not debug:

1926

try:

1927

with pidfile:

1928

pid = os.getpid()

1929

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

1930

del pidfile

1931

except IOError:

1932

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

1933

pidfilename, pid)

1934

except NameError:

1935

# "pidfile" was never created

1936

pass

1937

del pidfilename

1938

1625

1939

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

1940

1626

1941

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

1627

1942

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

1628

1943

1630

1945

class MandosDBusService(dbus.service.Object):

1631

1946

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

1632

1947

def __init__(self):

1633

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

1634

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

1635

1636

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

1637

def ClientAdded(self, objpath, properties):

1638

"D-Bus signal"

1639

pass

1640

1641

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

1642

def ClientNotFound(self, fingerprint):

1643

"D-Bus signal"

1644

pass

1645

1646

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

1948

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

1949

_interface = "se.bsnet.fukt.Mandos"

1950

1951

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

1952

def ClientAdded(self, objpath):

1953

"D-Bus signal"

1954

pass

1955

1956

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

1957

def ClientNotFound(self, fingerprint, address):

1958

"D-Bus signal"

1959

pass

1960

1961

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

1647

1962

def ClientRemoved(self, objpath, name):

1648

1963

"D-Bus signal"

1649

1964

pass

1650

1965

1651

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

1966

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

1652

1967

def GetAllClients(self):

1653

1968

"D-Bus method"

1654

1969

return dbus.Array(c.dbus_object_path

1655

1970

for c in tcp_server.clients)

1656

1971

1657

1972

@dbus.service.method(_interface,

1658

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

1973

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

1659

1974

def GetAllClientsWithProperties(self):

1660

1975

"D-Bus method"

1661

1976

return dbus.Dictionary(

1662

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

1977

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

1663

1978

for c in tcp_server.clients),

1664

signature=u"oa{sv}")

1979

signature="oa{sv}")

1665

1980

1666

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

1981

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

1667

1982

def RemoveClient(self, object_path):

1668

1983

"D-Bus method"

1669

1984

for c in tcp_server.clients:

1671

1986

tcp_server.clients.remove(c)

1672

1987

c.remove_from_connection()

1673

1988

# Don't signal anything except ClientRemoved

1674

c.disable(signal=False)

1989

c.disable(quiet=True)

1675

1990

# Emit D-Bus signal

1676

1991

self.ClientRemoved(object_path, c.name)

1677

1992

return

1678

raise KeyError

1993

raise KeyError(object_path)

1679

1994

1680

1995

del _interface

1681

1996

1682

1997

mandos_dbus_service = MandosDBusService()

1683

1998

1999

def cleanup():

2000

"Cleanup function; run on exit"

2001

service.cleanup()

2002

2003

while tcp_server.clients:

2004

client = tcp_server.clients.pop()

2005

if use_dbus:

2006

client.remove_from_connection()

2007

client.disable_hook = None

2008

# Don't signal anything except ClientRemoved

2009

client.disable(quiet=True)

2010

if use_dbus:

2011

# Emit D-Bus signal

2012

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2013

client.name)

2014

2015

atexit.register(cleanup)

2016

1684

2017

for client in tcp_server.clients:

1685

2018

if use_dbus:

1686

2019

# Emit D-Bus signal

1687

mandos_dbus_service.ClientAdded(client.dbus_object_path,

1688

client.GetAll(u""))

2020

mandos_dbus_service.ClientAdded(client.dbus_object_path)

1689

2021

client.enable()

1690

2022

1691

2023

tcp_server.enable()

1694

2026

# Find out what port we got

1695

2027

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

1696

2028

if use_ipv6:

1697

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

2029

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

1698

2030

" flowinfo %d, scope_id %d"

1699

2031

% tcp_server.socket.getsockname())

1700

2032

else: # IPv4

1701

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

2033

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

1702

2034

% tcp_server.socket.getsockname())

1703

2035

1704

2036

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

1707

2039

# From the Avahi example code

1708

2040

try:

1709

2041

service.activate()

1710

except dbus.exceptions.DBusException, error:

1711

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

2042

except dbus.exceptions.DBusException as error:

2043

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

2044

cleanup()

1712

2045

sys.exit(1)

1713

2046

# End of Avahi example code

1714

2047

1717

2050

(tcp_server.handle_request

1718

2051

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

1719

2052

1720

logger.debug(u"Starting main loop")

2053

logger.debug("Starting main loop")

1721

2054

main_loop.run()

1722

except AvahiError, error:

1723

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

2055

except AvahiError as error:

2056

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

2057

cleanup()

1724

2058

sys.exit(1)

1725

2059

except KeyboardInterrupt:

1726

2060

if debug:

1727

print >> sys.stderr

1728

logger.debug(u"Server received KeyboardInterrupt")

1729

logger.debug(u"Server exiting")

2061

print("", file=sys.stderr)

2062

logger.debug("Server received KeyboardInterrupt")

2063

logger.debug("Server exiting")

2064

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

2065

cleanup()

2066

1730

2067

1731

2068

if __name__ == '__main__':

1732

2069

main()