/mandos/trunk : revision 24.1.183

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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 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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_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_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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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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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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enabled: bool()

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

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

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

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

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to see if the client lives.

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'None' if no process is running.

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checker_initiator_tag: a gobject event source tag, or None

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disable_initiator_tag: - '' -

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checker_callback_tag: - '' -

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

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client lives. %() expansions are done at

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

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

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current_checker_command: string; current running checker_command

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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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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[u"secfile"])),

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

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

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self.disable_initiator_tag = (gobject.timeout_add

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(self.timeout_milliseconds(),

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self.disable))

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self.enabled = True

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self.last_enabled = datetime.datetime.utcnow()

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# Also start a new checker *right now*.

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self.start_checker()

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

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return False

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if not quiet:

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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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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):

453

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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458

"""

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)

463

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

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self.disable_initiator_tag = (gobject.timeout_add

385

(self.timeout_milliseconds(),

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(_timedelta_to_milliseconds(timeout),

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self.disable))

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468

def need_approval(self):

469

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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# 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)

407

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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:

411

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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command = self.checker_command % self.host

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except TypeError:

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# Escape attributes for the shell

422

escaped_attrs = dict((key,

423

re.escape(unicode(str(val),

424

errors=

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u'replace')))

426

for key, val in

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vars(self).iteritems())

505

escaped_attrs = dict(

506

(attr,

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

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errors=

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'replace')))

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for attr in

511

self.runtime_expansions)

512

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try:

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514

command = self.checker_command % escaped_attrs

430

except TypeError, error:

431

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

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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":'

517

' %s', self.checker_command, error)

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return True # Try again later

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self.current_checker_command = command

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520

try:

436

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

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

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command, self.name)

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

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

441

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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,

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shell=True, cwd=u"/")

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shell=True, cwd="/")

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self.checker_callback_tag = (gobject.child_watch_add

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(self.checker.pid,

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self.checker_callback,

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if pid:

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback(pid, status, command)

455

except OSError, error:

456

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

540

except OSError as error:

541

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

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542

error)

458

543

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

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return True

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if self.checker_callback_tag:

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback_tag = None

466

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

551

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

467

552

return

468

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

553

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

469

554

try:

470

555

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

471

556

#time.sleep(0.5)

472

557

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

473

558

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

474

except OSError, error:

559

except OSError as error:

475

560

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

476

561

raise

477

562

self.checker = None

478

563

479

480

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

481

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

564

def dbus_service_property(dbus_interface, signature="v",

565

access="readwrite", byte_arrays=False):

482

566

"""Decorators for marking methods of a DBusObjectWithProperties to

483

567

become properties on the D-Bus.

484

568

491

575

"""

492

576

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

493

577

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

494

if byte_arrays and signature != u"ay":

495

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

496

u" signature %r" % signature)

578

if byte_arrays and signature != "ay":

579

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

580

" signature %r" % signature)

497

581

def decorator(func):

498

582

func._dbus_is_property = True

499

583

func._dbus_interface = dbus_interface

500

584

func._dbus_signature = signature

501

585

func._dbus_access = access

502

586

func._dbus_name = func.__name__

503

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

587

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

504

588

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

505

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

589

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

506

590

return func

507

591

return decorator

508

592

536

620

537

621

@staticmethod

538

622

def _is_dbus_property(obj):

539

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

623

return getattr(obj, "_dbus_is_property", False)

540

624

541

625

def _get_all_dbus_properties(self):

542

626

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

550

634

property with the specified name and interface.

551

635

"""

552

636

for name in (property_name,

553

property_name + u"_dbus_property"):

637

property_name + "_dbus_property"):

554

638

prop = getattr(self, name, None)

555

639

if (prop is None

556

640

or not self._is_dbus_property(prop)

560

644

continue

561

645

return prop

562

646

# No such property

563

raise DBusPropertyNotFound(self.dbus_object_path + u":"

564

+ interface_name + u"."

647

raise DBusPropertyNotFound(self.dbus_object_path + ":"

648

+ interface_name + "."

565

649

+ property_name)

566

650

567

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

568

out_signature=u"v")

651

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

652

out_signature="v")

569

653

def Get(self, interface_name, property_name):

570

654

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

571

655

"""

572

656

prop = self._get_dbus_property(interface_name, property_name)

573

if prop._dbus_access == u"write":

657

if prop._dbus_access == "write":

574

658

raise DBusPropertyAccessException(property_name)

575

659

value = prop()

576

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

660

if not hasattr(value, "variant_level"):

577

661

return value

578

662

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

579

663

580

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

664

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

581

665

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

582

666

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

583

667

"""

584

668

prop = self._get_dbus_property(interface_name, property_name)

585

if prop._dbus_access == u"read":

669

if prop._dbus_access == "read":

586

670

raise DBusPropertyAccessException(property_name)

587

if prop._dbus_get_args_options[u"byte_arrays"]:

671

if prop._dbus_get_args_options["byte_arrays"]:

588

672

# The byte_arrays option is not supported yet on

589

673

# signatures other than "ay".

590

if prop._dbus_signature != u"ay":

674

if prop._dbus_signature != "ay":

591

675

raise ValueError

592

676

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

593

677

for byte in value))

594

678

prop(value)

595

679

596

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

597

out_signature=u"a{sv}")

680

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

681

out_signature="a{sv}")

598

682

def GetAll(self, interface_name):

599

683

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

600

684

standard.

608

692

# Interface non-empty but did not match

609

693

continue

610

694

# Ignore write-only properties

611

if prop._dbus_access == u"write":

695

if prop._dbus_access == "write":

612

696

continue

613

697

value = prop()

614

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

698

if not hasattr(value, "variant_level"):

615

699

all[name] = value

616

700

continue

617

701

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

618

702

value.variant_level+1)

619

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

703

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

620

704

621

705

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

622

out_signature=u"s",

706

out_signature="s",

623

707

path_keyword='object_path',

624

708

connection_keyword='connection')

625

709

def Introspect(self, object_path, connection):

630

714

try:

631

715

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

632

716

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)

717

e = document.createElement("property")

718

e.setAttribute("name", name)

719

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

720

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

637

721

return e

638

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

722

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

639

723

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

640

724

for name, prop

641

725

in self._get_all_dbus_properties()

642

726

if prop._dbus_interface

643

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

727

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

644

728

if_tag.appendChild(tag)

645

729

# Add the names to the return values for the

646

730

# "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")

731

if (if_tag.getAttribute("name")

732

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

733

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

734

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

735

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

736

if (arg.getAttribute("direction")

737

== "out"):

738

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

739

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

740

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

741

if (arg.getAttribute("direction")

742

== "out"):

743

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

744

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

661

745

document.unlink()

662

746

except (AttributeError, xml.dom.DOMException,

663

xml.parsers.expat.ExpatError), error:

664

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

747

xml.parsers.expat.ExpatError) as error:

748

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

665

749

error)

666

750

return xmlstring

667

751

668

752

753

def datetime_to_dbus (dt, variant_level=0):

754

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

755

if dt is None:

756

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

757

return dbus.String(dt.isoformat(),

758

variant_level=variant_level)

759

669

760

class ClientDBus(Client, DBusObjectWithProperties):

670

761

"""A Client class using D-Bus

671

762

673

764

dbus_object_path: dbus.ObjectPath

674

765

bus: dbus.SystemBus()

675

766

"""

767

768

runtime_expansions = (Client.runtime_expansions

769

+ ("dbus_object_path",))

770

676

771

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

677

772

678

773

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

774

self._approvals_pending = 0

679

775

self.bus = bus

680

776

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

681

777

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

682

778

# the D-Bus

779

client_object_name = unicode(self.name).translate(

780

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

781

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

683

782

self.dbus_object_path = (dbus.ObjectPath

684

(u"/clients/"

685

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

783

("/clients/" + client_object_name))

686

784

DBusObjectWithProperties.__init__(self, self.bus,

687

785

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, quiet = False):

709

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

710

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

711

if not quiet 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

786

787

def notifychangeproperty(transform_func,

788

dbus_name, type_func=lambda x: x,

789

variant_level=1):

790

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

791

changes to DBus.

792

transform_fun: Function that takes a value and transform it to

793

DBus type.

794

dbus_name: DBus name of the variable

795

type_func: Function that transform the value before sending it

796

to DBus

797

variant_level: DBus variant level. default: 1

798

"""

799

real_value = [None,]

800

def setter(self, value):

801

old_value = real_value[0]

802

real_value[0] = value

803

if hasattr(self, "dbus_object_path"):

804

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

805

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

806

variant_level)

807

self.PropertyChanged(dbus.String(dbus_name),

808

dbus_value)

809

810

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

811

812

813

expires = notifychangeproperty(datetime_to_dbus, "Expires")

814

approvals_pending = notifychangeproperty(dbus.Boolean,

815

"ApprovalPending",

816

type_func = bool)

817

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

818

last_enabled = notifychangeproperty(datetime_to_dbus,

819

"LastEnabled")

820

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

821

type_func = lambda checker: checker is not None)

822

last_checked_ok = notifychangeproperty(datetime_to_dbus,

823

"LastCheckedOK")

824

last_approval_request = notifychangeproperty(datetime_to_dbus,

825

"LastApprovalRequest")

826

approved_by_default = notifychangeproperty(dbus.Boolean,

827

"ApprovedByDefault")

828

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

829

type_func = _timedelta_to_milliseconds)

830

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

831

type_func = _timedelta_to_milliseconds)

832

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

833

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

834

type_func = _timedelta_to_milliseconds)

835

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

836

type_func = _timedelta_to_milliseconds)

837

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

838

type_func = _timedelta_to_milliseconds)

839

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

840

841

del notifychangeproperty

716

842

717

843

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

718

844

try:

719

845

self.remove_from_connection()

720

846

except LookupError:

721

847

pass

722

if hasattr(DBusObjectWithProperties, u"__del__"):

848

if hasattr(DBusObjectWithProperties, "__del__"):

723

849

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

724

850

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

725

851

727

853

*args, **kwargs):

728

854

self.checker_callback_tag = None

729

855

self.checker = None

730

# Emit D-Bus signal

731

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

732

dbus.Boolean(False, variant_level=1))

733

856

if os.WIFEXITED(condition):

734

857

exitstatus = os.WEXITSTATUS(condition)

735

858

# Emit D-Bus signal

744

867

745

868

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

746

869

*args, **kwargs)

747

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

870

757

871

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

758

872

old_checker = self.checker

759

873

if self.checker is not None:

766

880

and old_checker_pid != self.checker.pid):

767

881

# Emit D-Bus signal

768

882

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

883

return r

884

885

def _reset_approved(self):

886

self._approved = None

887

return False

888

889

def approve(self, value=True):

890

self.send_changedstate()

891

self._approved = value

892

gobject.timeout_add(_timedelta_to_milliseconds

893

(self.approval_duration),

894

self._reset_approved)

895

782

896

783

897

## D-Bus methods, signals & properties

784

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

898

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

785

899

786

900

## Signals

787

901

788

902

# CheckerCompleted - signal

789

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

903

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

790

904

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

791

905

"D-Bus signal"

792

906

pass

793

907

794

908

# CheckerStarted - signal

795

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

909

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

796

910

def CheckerStarted(self, command):

797

911

"D-Bus signal"

798

912

pass

799

913

800

914

# PropertyChanged - signal

801

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

915

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

802

916

def PropertyChanged(self, property, value):

803

917

"D-Bus signal"

804

918

pass

806

920

# GotSecret - signal

807

921

@dbus.service.signal(_interface)

808

922

def GotSecret(self):

809

"D-Bus signal"

923

"""D-Bus signal

924

Is sent after a successful transfer of secret from the Mandos

925

server to mandos-client

926

"""

810

927

pass

811

928

812

929

# Rejected - signal

813

@dbus.service.signal(_interface)

814

def Rejected(self):

930

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

931

def Rejected(self, reason):

815

932

"D-Bus signal"

816

933

pass

817

934

935

# NeedApproval - signal

936

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

937

def NeedApproval(self, timeout, default):

938

"D-Bus signal"

939

return self.need_approval()

940

818

941

## Methods

819

942

943

# Approve - method

944

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

945

def Approve(self, value):

946

self.approve(value)

947

820

948

# CheckedOK - method

821

949

@dbus.service.method(_interface)

822

950

def CheckedOK(self):

823

return self.checked_ok()

951

self.checked_ok()

824

952

825

953

# Enable - method

826

954

@dbus.service.method(_interface)

847

975

848

976

## Properties

849

977

850

# name - property

851

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

852

def name_dbus_property(self):

978

# ApprovalPending - property

979

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

980

def ApprovalPending_dbus_property(self):

981

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

982

983

# ApprovedByDefault - property

984

@dbus_service_property(_interface, signature="b",

985

access="readwrite")

986

def ApprovedByDefault_dbus_property(self, value=None):

987

if value is None: # get

988

return dbus.Boolean(self.approved_by_default)

989

self.approved_by_default = bool(value)

990

991

# ApprovalDelay - property

992

@dbus_service_property(_interface, signature="t",

993

access="readwrite")

994

def ApprovalDelay_dbus_property(self, value=None):

995

if value is None: # get

996

return dbus.UInt64(self.approval_delay_milliseconds())

997

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

998

999

# ApprovalDuration - property

1000

@dbus_service_property(_interface, signature="t",

1001

access="readwrite")

1002

def ApprovalDuration_dbus_property(self, value=None):

1003

if value is None: # get

1004

return dbus.UInt64(_timedelta_to_milliseconds(

1005

self.approval_duration))

1006

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

1007

1008

# Name - property

1009

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

1010

def Name_dbus_property(self):

853

1011

return dbus.String(self.name)

854

1012

855

# fingerprint - property

856

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

857

def fingerprint_dbus_property(self):

1013

# Fingerprint - property

1014

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

1015

def Fingerprint_dbus_property(self):

858

1016

return dbus.String(self.fingerprint)

859

1017

860

# host - property

861

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

862

access=u"readwrite")

863

def host_dbus_property(self, value=None):

1018

# Host - property

1019

@dbus_service_property(_interface, signature="s",

1020

access="readwrite")

1021

def Host_dbus_property(self, value=None):

864

1022

if value is None: # get

865

1023

return dbus.String(self.host)

866

1024

self.host = value

867

# Emit D-Bus signal

868

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

869

dbus.String(value, variant_level=1))

870

871

# created - property

872

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

873

def created_dbus_property(self):

874

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

875

876

# last_enabled - property

877

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

878

def last_enabled_dbus_property(self):

879

if self.last_enabled is None:

880

return dbus.String(u"")

881

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

882

883

# enabled - property

884

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

885

access=u"readwrite")

886

def enabled_dbus_property(self, value=None):

1025

1026

# Created - property

1027

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

1028

def Created_dbus_property(self):

1029

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

1030

1031

# LastEnabled - property

1032

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

1033

def LastEnabled_dbus_property(self):

1034

return datetime_to_dbus(self.last_enabled)

1035

1036

# Enabled - property

1037

@dbus_service_property(_interface, signature="b",

1038

access="readwrite")

1039

def Enabled_dbus_property(self, value=None):

887

1040

if value is None: # get

888

1041

return dbus.Boolean(self.enabled)

889

1042

if value:

891

1044

else:

892

1045

self.disable()

893

1046

894

# last_checked_ok - property

895

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

896

access=u"readwrite")

897

def last_checked_ok_dbus_property(self, value=None):

1047

# LastCheckedOK - property

1048

@dbus_service_property(_interface, signature="s",

1049

access="readwrite")

1050

def LastCheckedOK_dbus_property(self, value=None):

898

1051

if value is not None:

899

1052

self.checked_ok()

900

1053

return

901

if self.last_checked_ok is None:

902

return dbus.String(u"")

903

return dbus.String(self._datetime_to_dbus(self

904

.last_checked_ok))

905

906

# timeout - property

907

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

908

access=u"readwrite")

909

def timeout_dbus_property(self, value=None):

1054

return datetime_to_dbus(self.last_checked_ok)

1055

1056

# Expires - property

1057

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

1058

def Expires_dbus_property(self):

1059

return datetime_to_dbus(self.expires)

1060

1061

# LastApprovalRequest - property

1062

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

1063

def LastApprovalRequest_dbus_property(self):

1064

return datetime_to_dbus(self.last_approval_request)

1065

1066

# Timeout - property

1067

@dbus_service_property(_interface, signature="t",

1068

access="readwrite")

1069

def Timeout_dbus_property(self, value=None):

910

1070

if value is None: # get

911

1071

return dbus.UInt64(self.timeout_milliseconds())

912

1072

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

913

# Emit D-Bus signal

914

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

915

dbus.UInt64(value, variant_level=1))

916

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

1073

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

917

1074

return

918

1075

# Reschedule timeout

919

1076

gobject.source_remove(self.disable_initiator_tag)

920

1077

self.disable_initiator_tag = None

1078

self.expires = None

921

1079

time_to_die = (self.

922

1080

_timedelta_to_milliseconds((self

923

1081

.last_checked_ok

928

1086

# The timeout has passed

929

1087

self.disable()

930

1088

else:

1089

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

1090

+ datetime.timedelta(milliseconds = time_to_die))

931

1091

self.disable_initiator_tag = (gobject.timeout_add

932

1092

(time_to_die, self.disable))

933

934

# interval - property

935

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

936

access=u"readwrite")

937

def interval_dbus_property(self, value=None):

1093

1094

# ExtendedTimeout - property

1095

@dbus_service_property(_interface, signature="t",

1096

access="readwrite")

1097

def ExtendedTimeout_dbus_property(self, value=None):

1098

if value is None: # get

1099

return dbus.UInt64(self.extended_timeout_milliseconds())

1100

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

1101

1102

# Interval - property

1103

@dbus_service_property(_interface, signature="t",

1104

access="readwrite")

1105

def Interval_dbus_property(self, value=None):

938

1106

if value is None: # get

939

1107

return dbus.UInt64(self.interval_milliseconds())

940

1108

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

941

# Emit D-Bus signal

942

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

943

dbus.UInt64(value, variant_level=1))

944

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

1109

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

945

1110

return

946

1111

# Reschedule checker run

947

1112

gobject.source_remove(self.checker_initiator_tag)

949

1114

(value, self.start_checker))

950

1115

self.start_checker() # Start one now, too

951

1116

952

# checker - property

953

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

954

access=u"readwrite")

955

def checker_dbus_property(self, value=None):

1117

# Checker - property

1118

@dbus_service_property(_interface, signature="s",

1119

access="readwrite")

1120

def Checker_dbus_property(self, value=None):

956

1121

if value is None: # get

957

1122

return dbus.String(self.checker_command)

958

1123

self.checker_command = value

959

# Emit D-Bus signal

960

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

961

dbus.String(self.checker_command,

962

variant_level=1))

963

1124

964

# checker_running - property

965

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

966

access=u"readwrite")

967

def checker_running_dbus_property(self, value=None):

1125

# CheckerRunning - property

1126

@dbus_service_property(_interface, signature="b",

1127

access="readwrite")

1128

def CheckerRunning_dbus_property(self, value=None):

968

1129

if value is None: # get

969

1130

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

970

1131

if value:

972

1133

else:

973

1134

self.stop_checker()

974

1135

975

# object_path - property

976

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

977

def object_path_dbus_property(self):

1136

# ObjectPath - property

1137

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

1138

def ObjectPath_dbus_property(self):

978

1139

return self.dbus_object_path # is already a dbus.ObjectPath

979

1140

980

# secret = property

981

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

982

access=u"write", byte_arrays=True)

983

def secret_dbus_property(self, value):

1141

# Secret = property

1142

@dbus_service_property(_interface, signature="ay",

1143

access="write", byte_arrays=True)

1144

def Secret_dbus_property(self, value):

984

1145

self.secret = str(value)

985

1146

986

1147

del _interface

987

1148

988

1149

1150

class ProxyClient(object):

1151

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

1152

self._pipe = child_pipe

1153

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

1154

if not self._pipe.recv():

1155

raise KeyError()

1156

1157

def __getattribute__(self, name):

1158

if(name == '_pipe'):

1159

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

1160

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

1161

data = self._pipe.recv()

1162

if data[0] == 'data':

1163

return data[1]

1164

if data[0] == 'function':

1165

def func(*args, **kwargs):

1166

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

1167

return self._pipe.recv()[1]

1168

return func

1169

1170

def __setattr__(self, name, value):

1171

if(name == '_pipe'):

1172

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

1173

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

1174

1175

989

1176

class ClientHandler(socketserver.BaseRequestHandler, object):

990

1177

"""A class to handle client connections.

991

1178

993

1180

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

994

1181

995

1182

def handle(self):

996

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

997

unicode(self.client_address))

998

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

999

self.server.child_pipe[1].fileno())

1000

# Open IPC pipe to parent process

1001

with contextlib.nested(self.server.child_pipe[1],

1002

self.server.parent_pipe[0]

1003

) as (ipc, ipc_return):

1183

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

1184

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

1185

unicode(self.client_address))

1186

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

1187

self.server.child_pipe.fileno())

1188

1004

1189

session = (gnutls.connection

1005

1190

.ClientSession(self.request,

1006

1191

gnutls.connection

1007

1192

.X509Credentials()))

1008

1009

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

1010

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

1011

try:

1012

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

1013

raise RuntimeError

1014

except (ValueError, IndexError, RuntimeError), error:

1015

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

1016

return

1017

1193

1018

1194

# Note: gnutls.connection.X509Credentials is really a

1019

1195

# generic GnuTLS certificate credentials object so long as

1020

1196

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

1021

1197

# here despite using OpenPGP certificates.

1022

1023

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

1024

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

1025

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

1026

# u"+DHE-DSS"))

1198

1199

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

1200

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

1201

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

1202

# "+DHE-DSS"))

1027

1203

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

1028

1204

priority = self.server.gnutls_priority

1029

1205

if priority is None:

1030

priority = u"NORMAL"

1206

priority = "NORMAL"

1031

1207

(gnutls.library.functions

1032

1208

.gnutls_priority_set_direct(session._c_object,

1033

1209

priority, None))

1034

1210

1211

# Start communication using the Mandos protocol

1212

# Get protocol number

1213

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

1214

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

1215

try:

1216

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

1217

raise RuntimeError

1218

except (ValueError, IndexError, RuntimeError) as error:

1219

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

1220

return

1221

1222

# Start GnuTLS connection

1035

1223

try:

1036

1224

session.handshake()

1037

except gnutls.errors.GNUTLSError, error:

1038

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

1225

except gnutls.errors.GNUTLSError as error:

1226

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

1039

1227

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

1040

1228

# established. Just abandon the request.

1041

1229

return

1042

logger.debug(u"Handshake succeeded")

1230

logger.debug("Handshake succeeded")

1231

1232

approval_required = False

1043

1233

try:

1044

1234

try:

1045

1235

fpr = self.fingerprint(self.peer_certificate

1046

1236

(session))

1047

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

1048

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

1237

except (TypeError,

1238

gnutls.errors.GNUTLSError) as error:

1239

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

1049

1240

return

1050

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

1241

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

1051

1242

1052

for c in self.server.clients:

1053

if c.fingerprint == fpr:

1054

client = c

1243

try:

1244

client = ProxyClient(child_pipe, fpr,

1245

self.client_address)

1246

except KeyError:

1247

return

1248

1249

if client.approval_delay:

1250

delay = client.approval_delay

1251

client.approvals_pending += 1

1252

approval_required = True

1253

1254

while True:

1255

if not client.enabled:

1256

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

1257

client.name)

1258

if self.server.use_dbus:

1259

# Emit D-Bus signal

1260

client.Rejected("Disabled")

1261

return

1262

1263

if client._approved or not client.approval_delay:

1264

#We are approved or approval is disabled

1055

1265

break

1056

else:

1057

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

1058

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

1059

return

1060

# Have to check if client.enabled, since it is

1061

# possible that the client was disabled since the

1062

# GnuTLS session was established.

1063

ipc.write(u"GETATTR enabled %s\n" % fpr)

1064

enabled = pickle.load(ipc_return)

1065

if not enabled:

1066

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

1067

return

1068

# Send "NEED_APPROVAL" here and hang waiting

1069

# for response? Leave timeout to parent process?

1070

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

1266

elif client._approved is None:

1267

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

1268

client.name)

1269

if self.server.use_dbus:

1270

# Emit D-Bus signal

1271

client.NeedApproval(

1272

client.approval_delay_milliseconds(),

1273

client.approved_by_default)

1274

else:

1275

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

1276

client.name)

1277

if self.server.use_dbus:

1278

# Emit D-Bus signal

1279

client.Rejected("Denied")

1280

return

1281

1282

#wait until timeout or approved

1283

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

1284

time = datetime.datetime.now()

1285

client.changedstate.acquire()

1286

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

1287

client.changedstate.release()

1288

time2 = datetime.datetime.now()

1289

if (time2 - time) >= delay:

1290

if not client.approved_by_default:

1291

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

1292

" waiting for approval",

1293

client.name)

1294

if self.server.use_dbus:

1295

# Emit D-Bus signal

1296

client.Rejected("Approval timed out")

1297

return

1298

else:

1299

break

1300

else:

1301

delay -= time2 - time

1302

1071

1303

sent_size = 0

1072

1304

while sent_size < len(client.secret):

1073

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

1074

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

1305

try:

1306

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

1307

except gnutls.errors.GNUTLSError as error:

1308

logger.warning("gnutls send failed")

1309

return

1310

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

1075

1311

sent, len(client.secret)

1076

1312

- (sent_size + sent))

1077

1313

sent_size += sent

1314

1315

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

1316

# bump the timeout as if seen

1317

client.checked_ok(client.extended_timeout)

1318

if self.server.use_dbus:

1319

# Emit D-Bus signal

1320

client.GotSecret()

1321

1078

1322

finally:

1079

session.bye()

1323

if approval_required:

1324

client.approvals_pending -= 1

1325

try:

1326

session.bye()

1327

except gnutls.errors.GNUTLSError as error:

1328

logger.warning("GnuTLS bye failed")

1080

1329

1081

1330

@staticmethod

1082

1331

def peer_certificate(session):

1092

1341

.gnutls_certificate_get_peers

1093

1342

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

1094

1343

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

1095

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

1096

u" certificate")

1344

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

1345

" certificate")

1097

1346

if list_size.value == 0:

1098

1347

return None

1099

1348

cert = cert_list[0]

1125

1374

if crtverify.value != 0:

1126

1375

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1127

1376

raise (gnutls.errors.CertificateSecurityError

1128

(u"Verify failed"))

1377

("Verify failed"))

1129

1378

# New buffer for the fingerprint

1130

1379

buf = ctypes.create_string_buffer(20)

1131

1380

buf_len = ctypes.c_size_t()

1138

1387

# Convert the buffer to a Python bytestring

1139

1388

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

1140

1389

# Convert the bytestring to hexadecimal notation

1141

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

1390

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

1142

1391

return hex_fpr

1143

1392

1144

1393

1145

class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):

1146

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

1394

class MultiprocessingMixIn(object):

1395

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

1396

def sub_process_main(self, request, address):

1397

try:

1398

self.finish_request(request, address)

1399

except:

1400

self.handle_error(request, address)

1401

self.close_request(request)

1402

1403

def process_request(self, request, address):

1404

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

1405

multiprocessing.Process(target = self.sub_process_main,

1406

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

1407

1408

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1409

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

1147

1410

def process_request(self, request, client_address):

1148

1411

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

1149

1412

1150

1413

This function creates a new pipe in self.pipe

1151

1414

"""

1152

# Child writes to child_pipe

1153

self.child_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))

1154

# Parent writes to parent_pipe

1155

self.parent_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))

1156

super(ForkingMixInWithPipes,

1415

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1416

1417

super(MultiprocessingMixInWithPipe,

1157

1418

self).process_request(request, client_address)

1158

# Close unused ends for parent

1159

self.parent_pipe[0].close() # close read end

1160

self.child_pipe[1].close() # close write end

1161

self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])

1162

def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):

1419

self.child_pipe.close()

1420

self.add_pipe(parent_pipe)

1421

1422

def add_pipe(self, parent_pipe):

1163

1423

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

1164

child_pipe_fd.close()

1165

parent_pipe_fd.close()

1166

1167

1168

class IPv6_TCPServer(ForkingMixInWithPipes,

1424

raise NotImplementedError

1425

1426

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1169

1427

socketserver.TCPServer, object):

1170

1428

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

1171

1429

1187

1445

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

1188

1446

if self.interface is not None:

1189

1447

if SO_BINDTODEVICE is None:

1190

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

1191

u" cannot bind to interface %s",

1448

logger.error("SO_BINDTODEVICE does not exist;"

1449

" cannot bind to interface %s",

1192

1450

self.interface)

1193

1451

else:

1194

1452

try:

1195

1453

self.socket.setsockopt(socket.SOL_SOCKET,

1196

1454

SO_BINDTODEVICE,

1197

1455

str(self.interface

1198

+ u'\0'))

1199

except socket.error, error:

1456

+ '\0'))

1457

except socket.error as error:

1200

1458

if error[0] == errno.EPERM:

1201

logger.error(u"No permission to"

1202

u" bind to interface %s",

1459

logger.error("No permission to"

1460

" bind to interface %s",

1203

1461

self.interface)

1204

1462

elif error[0] == errno.ENOPROTOOPT:

1205

logger.error(u"SO_BINDTODEVICE not available;"

1206

u" cannot bind to interface %s",

1463

logger.error("SO_BINDTODEVICE not available;"

1464

" cannot bind to interface %s",

1207

1465

self.interface)

1208

1466

else:

1209

1467

raise

1211

1469

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

1212

1470

if not self.server_address[0]:

1213

1471

if self.address_family == socket.AF_INET6:

1214

any_address = u"::" # in6addr_any

1472

any_address = "::" # in6addr_any

1215

1473

else:

1216

1474

any_address = socket.INADDR_ANY

1217

1475

self.server_address = (any_address,

1256

1514

return socketserver.TCPServer.server_activate(self)

1257

1515

def enable(self):

1258

1516

self.enabled = True

1259

def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):

1517

def add_pipe(self, parent_pipe):

1260

1518

# Call "handle_ipc" for both data and EOF events

1261

gobject.io_add_watch(child_pipe_fd.fileno(),

1519

gobject.io_add_watch(parent_pipe.fileno(),

1262

1520

gobject.IO_IN | gobject.IO_HUP,

1263

1521

functools.partial(self.handle_ipc,

1264

reply = parent_pipe_fd,

1265

sender= child_pipe_fd))

1266

def handle_ipc(self, source, condition, reply=None, sender=None):

1522

parent_pipe = parent_pipe))

1523

1524

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

1525

client_object=None):

1267

1526

condition_names = {

1268

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

1269

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

1527

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

1528

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

1270

1529

# blocking).

1271

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

1272

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

1273

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

1530

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

1531

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

1532

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

1274

1533

# broken, usually for pipes and

1275

1534

# sockets).

1276

1535

}

1278

1537

for cond, name in

1279

1538

condition_names.iteritems()

1280

1539

if cond & condition)

1281

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

1282

conditions_string)

1283

1284

# Read a line from the file object

1285

cmdline = sender.readline()

1286

if not cmdline: # Empty line means end of file

1287

# close the IPC pipes

1288

sender.close()

1289

reply.close()

1290

1291

# Stop calling this function

1292

return False

1293

1294

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

1295

1296

# Parse and act on command

1297

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

1298

1299

if cmd == u"NOTFOUND":

1300

fpr, address = args.split(None, 1)

1301

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

1302

u"dress: %s", fpr, address)

1303

if self.use_dbus:

1304

# Emit D-Bus signal

1305

mandos_dbus_service.ClientNotFound(fpr, address)

1306

elif cmd == u"DISABLED":

1307

for client in self.clients:

1308

if client.name == args:

1309

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

1310

if self.use_dbus:

1311

# Emit D-Bus signal

1312

client.Rejected()

1313

break

1314

else:

1315

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

1316

elif cmd == u"SENDING":

1317

for client in self.clients:

1318

if client.name == args:

1319

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

1320

client.checked_ok()

1321

if self.use_dbus:

1322

# Emit D-Bus signal

1323

client.GotSecret()

1324

break

1325

else:

1326

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

1327

args)

1328

elif cmd == u"GETATTR":

1329

attr_name, fpr = args.split(None, 1)

1330

for client in self.clients:

1331

if client.fingerprint == fpr:

1332

attr_value = getattr(client, attr_name, None)

1333

logger.debug("IPC reply: %r", attr_value)

1334

pickle.dump(attr_value, reply)

1335

break

1336

else:

1337

logger.error(u"Client %s on address %s requesting "

1338

u"attribute %s not found", fpr, address,

1339

attr_name)

1340

pickle.dump(None, reply)

1341

else:

1342

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

1343

1344

# Keep calling this function

1540

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

1541

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

1542

return False

1543

1544

# Read a request from the child

1545

request = parent_pipe.recv()

1546

command = request[0]

1547

1548

if command == 'init':

1549

fpr = request[1]

1550

address = request[2]

1551

1552

for c in self.clients:

1553

if c.fingerprint == fpr:

1554

client = c

1555

break

1556

else:

1557

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

1558

"dress: %s", fpr, address)

1559

if self.use_dbus:

1560

# Emit D-Bus signal

1561

mandos_dbus_service.ClientNotFound(fpr, address[0])

1562

parent_pipe.send(False)

1563

return False

1564

1565

gobject.io_add_watch(parent_pipe.fileno(),

1566

gobject.IO_IN | gobject.IO_HUP,

1567

functools.partial(self.handle_ipc,

1568

parent_pipe = parent_pipe,

1569

client_object = client))

1570

parent_pipe.send(True)

1571

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

1572

return False

1573

if command == 'funcall':

1574

funcname = request[1]

1575

args = request[2]

1576

kwargs = request[3]

1577

1578

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

1579

1580

if command == 'getattr':

1581

attrname = request[1]

1582

if callable(client_object.__getattribute__(attrname)):

1583

parent_pipe.send(('function',))

1584

else:

1585

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

1586

1587

if command == 'setattr':

1588

attrname = request[1]

1589

value = request[2]

1590

setattr(client_object, attrname, value)

1591

1345

1592

return True

1346

1593

1347

1594

1348

1595

def string_to_delta(interval):

1349

1596

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

1350

1597

1351

>>> string_to_delta(u'7d')

1598

>>> string_to_delta('7d')

1352

1599

datetime.timedelta(7)

1353

>>> string_to_delta(u'60s')

1600

>>> string_to_delta('60s')

1354

1601

datetime.timedelta(0, 60)

1355

>>> string_to_delta(u'60m')

1602

>>> string_to_delta('60m')

1356

1603

datetime.timedelta(0, 3600)

1357

>>> string_to_delta(u'24h')

1604

>>> string_to_delta('24h')

1358

1605

datetime.timedelta(1)

1359

>>> string_to_delta(u'1w')

1606

>>> string_to_delta('1w')

1360

1607

datetime.timedelta(7)

1361

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

1608

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

1362

1609

datetime.timedelta(0, 330)

1363

1610

"""

1364

1611

timevalue = datetime.timedelta(0)

1366

1613

try:

1367

1614

suffix = unicode(s[-1])

1368

1615

value = int(s[:-1])

1369

if suffix == u"d":

1616

if suffix == "d":

1370

1617

delta = datetime.timedelta(value)

1371

elif suffix == u"s":

1618

elif suffix == "s":

1372

1619

delta = datetime.timedelta(0, value)

1373

elif suffix == u"m":

1620

elif suffix == "m":

1374

1621

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

1375

elif suffix == u"h":

1622

elif suffix == "h":

1376

1623

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

1377

elif suffix == u"w":

1624

elif suffix == "w":

1378

1625

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

1379

1626

else:

1380

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

1381

except (ValueError, IndexError), e:

1382

raise ValueError(e.message)

1627

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

1628

except (ValueError, IndexError) as e:

1629

raise ValueError(*(e.args))

1383

1630

timevalue += delta

1384

1631

return timevalue

1385

1632

1391

1638

global if_nametoindex

1392

1639

try:

1393

1640

if_nametoindex = (ctypes.cdll.LoadLibrary

1394

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

1641

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

1395

1642

.if_nametoindex)

1396

1643

except (OSError, AttributeError):

1397

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

1644

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

1398

1645

def if_nametoindex(interface):

1399

1646

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

1400

1647

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

1401

1648

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

1402

1649

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1403

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

1650

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

1404

1651

interface))

1405

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

1652

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

1406

1653

ifreq[16:20])[0]

1407

1654

return interface_index

1408

1655

return if_nametoindex(interface)

1416

1663

sys.exit()

1417

1664

os.setsid()

1418

1665

if not nochdir:

1419

os.chdir(u"/")

1666

os.chdir("/")

1420

1667

if os.fork():

1421

1668

sys.exit()

1422

1669

if not noclose:

1424

1671

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

1425

1672

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

1426

1673

raise OSError(errno.ENODEV,

1427

u"%s not a character device"

1674

"%s not a character device"

1428

1675

% os.path.devnull)

1429

1676

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

1430

1677

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

1438

1685

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

1439

1686

# Parsing of options, both command line and config file

1440

1687

1441

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

1442

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

1443

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

1444

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

1445

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

1446

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

1447

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

1448

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

1449

help=u"Run self-test")

1450

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

1451

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

1452

u" terminal")

1453

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

1454

u" priority string (see GnuTLS documentation)")

1455

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

1456

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

1457

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

1458

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

1459

help=u"Directory to search for configuration"

1460

u" files")

1461

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

1462

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

1463

u" system bus interface")

1464

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

1465

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

1466

options = parser.parse_args()[0]

1688

parser = argparse.ArgumentParser()

1689

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

1690

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

1691

help="show version number and exit")

1692

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

1693

help="Bind to interface IF")

1694

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

1695

help="Address to listen for requests on")

1696

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

1697

help="Port number to receive requests on")

1698

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

1699

help="Run self-test")

1700

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

1701

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

1702

" to terminal")

1703

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

1704

help="Debug level for stdout output")

1705

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

1706

" priority string (see GnuTLS documentation)")

1707

parser.add_argument("--servicename",

1708

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

1709

parser.add_argument("--configdir",

1710

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

1711

help="Directory to search for configuration"

1712

" files")

1713

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

1714

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

1715

" system bus interface")

1716

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

1717

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

1718

options = parser.parse_args()

1467

1719

1468

1720

if options.check:

1469

1721

import doctest

1471

1723

sys.exit()

1472

1724

1473

1725

# Default values for config file for server-global settings

1474

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

1475

u"address": u"",

1476

u"port": u"",

1477

u"debug": u"False",

1478

u"priority":

1479

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

1480

u"servicename": u"Mandos",

1481

u"use_dbus": u"True",

1482

u"use_ipv6": u"True",

1726

server_defaults = { "interface": "",

1727

"address": "",

1728

"port": "",

1729

"debug": "False",

1730

"priority":

1731

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

1732

"servicename": "Mandos",

1733

"use_dbus": "True",

1734

"use_ipv6": "True",

1735

"debuglevel": "",

1483

1736

}

1484

1737

1485

1738

# Parse config file for server-global settings

1486

1739

server_config = configparser.SafeConfigParser(server_defaults)

1487

1740

del server_defaults

1488

1741

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

1489

u"mandos.conf"))

1742

"mandos.conf"))

1490

1743

# Convert the SafeConfigParser object to a dict

1491

1744

server_settings = server_config.defaults()

1492

1745

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

1493

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

1494

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

1746

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

1747

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

1495

1748

option)

1496

1749

if server_settings["port"]:

1497

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

1498

u"port")

1750

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

1751

"port")

1499

1752

del server_config

1500

1753

1501

1754

# Override the settings from the config file with command line

1502

1755

# options, if set.

1503

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

1504

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

1505

u"use_dbus", u"use_ipv6"):

1756

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

1757

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

1758

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

1506

1759

value = getattr(options, option)

1507

1760

if value is not None:

1508

1761

server_settings[option] = value

1516

1769

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

1517

1770

1518

1771

# For convenience

1519

debug = server_settings[u"debug"]

1520

use_dbus = server_settings[u"use_dbus"]

1521

use_ipv6 = server_settings[u"use_ipv6"]

1522

1523

if not debug:

1524

syslogger.setLevel(logging.WARNING)

1525

console.setLevel(logging.WARNING)

1526

1527

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

1772

debug = server_settings["debug"]

1773

debuglevel = server_settings["debuglevel"]

1774

use_dbus = server_settings["use_dbus"]

1775

use_ipv6 = server_settings["use_ipv6"]

1776

1777

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

1528

1778

syslogger.setFormatter(logging.Formatter

1529

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

1530

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

1531

% server_settings[u"servicename"]))

1779

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

1780

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

1781

% server_settings["servicename"]))

1532

1782

1533

1783

# Parse config file with clients

1534

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

1535

u"interval": u"5m",

1536

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

1537

u"host": u"",

1784

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

1785

"extended_timeout": "15m",

1786

"interval": "2m",

1787

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

1788

"host": "",

1789

"approval_delay": "0s",

1790

"approval_duration": "1s",

1538

1791

}

1539

1792

client_config = configparser.SafeConfigParser(client_defaults)

1540

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

1541

u"clients.conf"))

1793

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

1794

"clients.conf"))

1542

1795

1543

1796

global mandos_dbus_service

1544

1797

mandos_dbus_service = None

1545

1798

1546

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

1547

server_settings[u"port"]),

1799

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

1800

server_settings["port"]),

1548

1801

ClientHandler,

1549

interface=server_settings[u"interface"],

1802

interface=(server_settings["interface"]

1803

or None),

1550

1804

use_ipv6=use_ipv6,

1551

1805

gnutls_priority=

1552

server_settings[u"priority"],

1806

server_settings["priority"],

1553

1807

use_dbus=use_dbus)

1554

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

1555

try:

1556

pidfile = open(pidfilename, u"w")

1557

except IOError:

1558

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

1808

if not debug:

1809

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

1810

try:

1811

pidfile = open(pidfilename, "w")

1812

except IOError:

1813

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

1559

1814

1560

1815

try:

1561

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

1562

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

1816

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

1817

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

1563

1818

except KeyError:

1564

1819

try:

1565

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

1566

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

1820

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

1821

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

1567

1822

except KeyError:

1568

1823

try:

1569

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

1570

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

1824

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

1825

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

1571

1826

except KeyError:

1572

1827

uid = 65534

1573

1828

gid = 65534

1574

1829

try:

1575

1830

os.setgid(gid)

1576

1831

os.setuid(uid)

1577

except OSError, error:

1832

except OSError as error:

1578

1833

if error[0] != errno.EPERM:

1579

1834

raise error

1580

1835

1581

# Enable all possible GnuTLS debugging

1836

if not debug and not debuglevel:

1837

syslogger.setLevel(logging.WARNING)

1838

console.setLevel(logging.WARNING)

1839

if debuglevel:

1840

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

1841

syslogger.setLevel(level)

1842

console.setLevel(level)

1843

1582

1844

if debug:

1845

# Enable all possible GnuTLS debugging

1846

1583

1847

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

1584

1848

# - GnuTLS manual

1585

1849

gnutls.library.functions.gnutls_global_set_log_level(11)

1586

1850

1587

1851

@gnutls.library.types.gnutls_log_func

1588

1852

def debug_gnutls(level, string):

1589

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

1853

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

1590

1854

1591

1855

(gnutls.library.functions

1592

1856

.gnutls_global_set_log_function(debug_gnutls))

1857

1858

# Redirect stdin so all checkers get /dev/null

1859

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

1860

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

1861

if null > 2:

1862

os.close(null)

1863

else:

1864

# No console logging

1865

logger.removeHandler(console)

1866

1867

# Need to fork before connecting to D-Bus

1868

if not debug:

1869

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

1870

daemon()

1593

1871

1594

1872

global main_loop

1595

1873

# From the Avahi example code

1599

1877

# End of Avahi example code

1600

1878

if use_dbus:

1601

1879

try:

1602

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

1880

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

1603

1881

bus, do_not_queue=True)

1604

except dbus.exceptions.NameExistsException, e:

1605

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

1882

except dbus.exceptions.NameExistsException as e:

1883

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

1606

1884

use_dbus = False

1607

server_settings[u"use_dbus"] = False

1885

server_settings["use_dbus"] = False

1608

1886

tcp_server.use_dbus = False

1609

1887

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1610

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

1611

servicetype = u"_mandos._tcp",

1888

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

1889

servicetype = "_mandos._tcp",

1612

1890

protocol = protocol, bus = bus)

1613

1891

if server_settings["interface"]:

1614

1892

service.interface = (if_nametoindex

1615

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

1893

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

1894

1895

global multiprocessing_manager

1896

multiprocessing_manager = multiprocessing.Manager()

1616

1897

1617

1898

client_class = Client

1618

1899

if use_dbus:

1619

1900

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

1901

def client_config_items(config, section):

1902

special_settings = {

1903

"approved_by_default":

1904

lambda: config.getboolean(section,

1905

"approved_by_default"),

1906

}

1907

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

1908

try:

1909

yield (name, special_settings[name]())

1910

except KeyError:

1911

yield (name, value)

1912

1620

1913

tcp_server.clients.update(set(

1621

1914

client_class(name = section,

1622

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

1915

config= dict(client_config_items(

1916

client_config, section)))

1623

1917

for section in client_config.sections()))

1624

1918

if not tcp_server.clients:

1625

logger.warning(u"No clients defined")

1626

1627

if debug:

1628

# Redirect stdin so all checkers get /dev/null

1629

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

1630

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

1631

if null > 2:

1632

os.close(null)

1633

else:

1634

# No console logging

1635

logger.removeHandler(console)

1636

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

1637

daemon()

1638

1639

try:

1640

with pidfile:

1641

pid = os.getpid()

1642

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

1643

del pidfile

1644

except IOError:

1645

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

1646

pidfilename, pid)

1647

except NameError:

1648

# "pidfile" was never created

1649

pass

1650

del pidfilename

1651

1919

logger.warning("No clients defined")

1920

1652

1921

if not debug:

1922

try:

1923

with pidfile:

1924

pid = os.getpid()

1925

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

1926

del pidfile

1927

except IOError:

1928

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

1929

pidfilename, pid)

1930

except NameError:

1931

# "pidfile" was never created

1932

pass

1933

del pidfilename

1934

1653

1935

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

1936

1654

1937

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

1655

1938

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

1656

1939

1658

1941

class MandosDBusService(dbus.service.Object):

1659

1942

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

1660

1943

def __init__(self):

1661

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

1662

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

1944

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

1945

_interface = "se.bsnet.fukt.Mandos"

1663

1946

1664

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

1947

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

1665

1948

def ClientAdded(self, objpath):

1666

1949

"D-Bus signal"

1667

1950

pass

1668

1951

1669

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

1952

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

1670

1953

def ClientNotFound(self, fingerprint, address):

1671

1954

"D-Bus signal"

1672

1955

pass

1673

1956

1674

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

1957

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

1675

1958

def ClientRemoved(self, objpath, name):

1676

1959

"D-Bus signal"

1677

1960

pass

1678

1961

1679

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

1962

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

1680

1963

def GetAllClients(self):

1681

1964

"D-Bus method"

1682

1965

return dbus.Array(c.dbus_object_path

1683

1966

for c in tcp_server.clients)

1684

1967

1685

1968

@dbus.service.method(_interface,

1686

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

1969

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

1687

1970

def GetAllClientsWithProperties(self):

1688

1971

"D-Bus method"

1689

1972

return dbus.Dictionary(

1690

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

1973

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

1691

1974

for c in tcp_server.clients),

1692

signature=u"oa{sv}")

1975

signature="oa{sv}")

1693

1976

1694

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

1977

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

1695

1978

def RemoveClient(self, object_path):

1696

1979

"D-Bus method"

1697

1980

for c in tcp_server.clients:

1739

2022

# Find out what port we got

1740

2023

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

1741

2024

if use_ipv6:

1742

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

2025

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

1743

2026

" flowinfo %d, scope_id %d"

1744

2027

% tcp_server.socket.getsockname())

1745

2028

else: # IPv4

1746

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

2029

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

1747

2030

% tcp_server.socket.getsockname())

1748

2031

1749

2032

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

1752

2035

# From the Avahi example code

1753

2036

try:

1754

2037

service.activate()

1755

except dbus.exceptions.DBusException, error:

1756

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

2038

except dbus.exceptions.DBusException as error:

2039

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

1757

2040

cleanup()

1758

2041

sys.exit(1)

1759

2042

# End of Avahi example code

1763

2046

(tcp_server.handle_request

1764

2047

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

1765

2048

1766

logger.debug(u"Starting main loop")

2049

logger.debug("Starting main loop")

1767

2050

main_loop.run()

1768

except AvahiError, error:

1769

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

2051

except AvahiError as error:

2052

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

1770

2053

cleanup()

1771

2054

sys.exit(1)

1772

2055

except KeyboardInterrupt:

1773

2056

if debug:

1774

print >> sys.stderr

1775

logger.debug(u"Server received KeyboardInterrupt")

1776

logger.debug(u"Server exiting")

2057

print("", file=sys.stderr)

2058

logger.debug("Server received KeyboardInterrupt")

2059

logger.debug("Server exiting")

1777

2060

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

1778

2061

cleanup()

1779

2062