/mandos/trunk : revision 441

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

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#

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# Everything else is

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#

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

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from __future__ import division, with_statement, absolute_import

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import SocketServer as socketserver

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import socket

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import argparse

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import optparse

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import datetime

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import errno

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import gnutls.crypto

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SO_BINDTODEVICE = None

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version = "1.3.1"

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version = "1.0.14"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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#logger = logging.getLogger(u'mandos')

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logger = logging.Logger(u'mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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

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u' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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

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u' %(levelname)s:'

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u' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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Attributes:

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interface: integer; avahi.IF_UNSPEC or an interface index.

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Used to optionally bind to the specified interface.

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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"""

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

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.group = None # our entry group

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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

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u" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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except dbus.exceptions.DBusException, error:

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logger.critical(u"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.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self .entry_group_state_changed))

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

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self.group.connect_to_signal('StateChanged',

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self

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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.name, self.type)

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self.group.AddService(

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self.interface,

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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logger.debug("Zeroconf service established.")

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

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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raise AvahiGroupError(u"State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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pass

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self.group.Free()

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self.group = None

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self.remove()

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

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def server_state_changed(self, state):

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

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

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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else:

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

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self.cleanup()

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

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if state == avahi.SERVER_COLLISION:

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

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self.remove()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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else:

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if error is None:

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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avahi.DBUS_PATH_SERVER,

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follow_name_owner_changes=True),

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avahi.DBUS_PATH_SERVER),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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self.server.connect_to_signal(u"StateChanged",

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self.server_state_changed)

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

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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_callback_tag: - '' -

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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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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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disable_initiator_tag: - '' -

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enabled: bool()

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

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uniquely identify the client

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host: string; available for use by the checker command

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

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

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

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last_enabled: datetime.datetime(); (UTC)

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

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

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until this client is disabled

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extended_timeout: extra long timeout when password has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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runtime_expansions = (u"approval_delay", u"approval_duration",

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

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

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

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@staticmethod

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def _timedelta_to_milliseconds(td):

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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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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return self._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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self.name = name

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if config is None:

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config = {}

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

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

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

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.replace(" ", ""))

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

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if "secret" in config:

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

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elif "secfile" in config:

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

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

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

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if u"secret" in config:

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

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elif u"secfile" in config:

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

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(config["secfile"])),

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(config[u"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("No secret or secfile for client %s"

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

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% self.name)

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

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

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self.created = datetime.datetime.utcnow()

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self.enabled = False

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self.last_approval_request = None

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self.last_enabled = None

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self.last_checked_ok = None

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

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

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

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

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

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self.disable_hook = disable_hook

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

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self.expires = None

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self.checker_callback_tag = None

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self.checker_command = config["checker"]

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self.checker_command = config[u"checker"]

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self.current_checker_command = None

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self.last_connect = None

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self._approved = None

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

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self.approved_by_default = config.get(u"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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config[u"approval_delay"])

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self.approval_duration = string_to_delta(

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config["approval_duration"])

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config[u"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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def enable(self):

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

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

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

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# Already enabled

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return

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self.send_changedstate()

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(self.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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if not quiet:

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self.send_changedstate()

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if not quiet:

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

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

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

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

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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self.expires = None

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

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

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = None

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self.stop_checker()

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if os.WIFEXITED(condition):

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exitstatus = os.WEXITSTATUS(condition)

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if exitstatus == 0:

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

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

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

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vars(self))

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else:

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

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

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vars(self))

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def checked_ok(self, timeout=None):

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def checked_ok(self):

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"""Bump up the timeout for this client.

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

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alive and well.

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"""

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if timeout is None:

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timeout = self.timeout

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self.last_checked_ok = datetime.datetime.utcnow()

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gobject.source_remove(self.disable_initiator_tag)

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

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self.disable_initiator_tag = (gobject.timeout_add

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(self._timedelta_to_milliseconds(timeout),

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(self.timeout_milliseconds(),

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self.disable))

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def need_approval(self):

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self.last_approval_request = datetime.datetime.utcnow()

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def start_checker(self):

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

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# 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) as error:

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except (AttributeError, OSError), error:

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if (isinstance(error, OSError)

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and error.errno != errno.ECHILD):

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raise error

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else:

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if pid:

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logger.warning("Checker was a zombie")

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logger.warning(u"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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# Escape attributes for the shell

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escaped_attrs = dict(

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(attr,

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

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

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errors=

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'replace')))

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u'replace')))

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for attr in

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self.runtime_expansions)

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try:

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command = self.checker_command % escaped_attrs

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except TypeError as error:

517

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

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' %s', self.checker_command, error)

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except TypeError, error:

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

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u' %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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474

try:

522

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

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

523

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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(),

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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="/")

483

shell=True, cwd=u"/")

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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)

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except OSError as error:

542

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

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except OSError, error:

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

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error)

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

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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

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

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

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return

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

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

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try:

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509

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

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#time.sleep(0.5)

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

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

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except OSError as error:

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except OSError, error:

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

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raise

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self.checker = None

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def dbus_service_property(dbus_interface, signature="v",

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access="readwrite", byte_arrays=False):

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

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

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"""Decorators for marking methods of a DBusObjectWithProperties to

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become properties on the D-Bus.

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"""

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

578

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

579

if byte_arrays and signature != "ay":

580

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

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" signature %r" % signature)

532

if byte_arrays and signature != u"ay":

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

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u" signature %r" % signature)

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535

def decorator(func):

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func._dbus_is_property = True

584

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func._dbus_interface = dbus_interface

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func._dbus_signature = signature

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func._dbus_access = access

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func._dbus_name = func.__name__

588

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

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

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542

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

590

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

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

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return func

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return decorator

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621

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@staticmethod

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def _is_dbus_property(obj):

624

return getattr(obj, "_dbus_is_property", False)

577

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

625

578

626

579

def _get_all_dbus_properties(self):

627

580

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

635

588

property with the specified name and interface.

636

589

"""

637

590

for name in (property_name,

638

property_name + "_dbus_property"):

591

property_name + u"_dbus_property"):

639

592

prop = getattr(self, name, None)

640

593

if (prop is None

641

594

or not self._is_dbus_property(prop)

645

598

continue

646

599

return prop

647

600

# No such property

648

raise DBusPropertyNotFound(self.dbus_object_path + ":"

649

+ interface_name + "."

601

raise DBusPropertyNotFound(self.dbus_object_path + u":"

602

+ interface_name + u"."

650

603

+ property_name)

651

604

652

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

653

out_signature="v")

605

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

606

out_signature=u"v")

654

607

def Get(self, interface_name, property_name):

655

608

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

656

609

"""

657

610

prop = self._get_dbus_property(interface_name, property_name)

658

if prop._dbus_access == "write":

611

if prop._dbus_access == u"write":

659

612

raise DBusPropertyAccessException(property_name)

660

613

value = prop()

661

if not hasattr(value, "variant_level"):

614

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

662

615

return value

663

616

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

664

617

665

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

618

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

666

619

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

667

620

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

668

621

"""

669

622

prop = self._get_dbus_property(interface_name, property_name)

670

if prop._dbus_access == "read":

623

if prop._dbus_access == u"read":

671

624

raise DBusPropertyAccessException(property_name)

672

if prop._dbus_get_args_options["byte_arrays"]:

625

if prop._dbus_get_args_options[u"byte_arrays"]:

673

626

# The byte_arrays option is not supported yet on

674

627

# signatures other than "ay".

675

if prop._dbus_signature != "ay":

628

if prop._dbus_signature != u"ay":

676

629

raise ValueError

677

630

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

678

631

for byte in value))

679

632

prop(value)

680

633

681

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

682

out_signature="a{sv}")

634

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

635

out_signature=u"a{sv}")

683

636

def GetAll(self, interface_name):

684

637

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

685

638

standard.

693

646

# Interface non-empty but did not match

694

647

continue

695

648

# Ignore write-only properties

696

if prop._dbus_access == "write":

649

if prop._dbus_access == u"write":

697

650

continue

698

651

value = prop()

699

if not hasattr(value, "variant_level"):

652

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

700

653

all[name] = value

701

654

continue

702

655

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

703

656

value.variant_level+1)

704

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

657

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

705

658

706

659

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

707

out_signature="s",

660

out_signature=u"s",

708

661

path_keyword='object_path',

709

662

connection_keyword='connection')

710

663

def Introspect(self, object_path, connection):

715

668

try:

716

669

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

717

670

def make_tag(document, name, prop):

718

e = document.createElement("property")

719

e.setAttribute("name", name)

720

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

721

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

671

e = document.createElement(u"property")

672

e.setAttribute(u"name", name)

673

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

674

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

722

675

return e

723

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

676

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

724

677

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

725

678

for name, prop

726

679

in self._get_all_dbus_properties()

727

680

if prop._dbus_interface

728

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

681

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

729

682

if_tag.appendChild(tag)

730

683

# Add the names to the return values for the

731

684

# "org.freedesktop.DBus.Properties" methods

732

if (if_tag.getAttribute("name")

733

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

734

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

735

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

736

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

737

if (arg.getAttribute("direction")

738

== "out"):

739

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

740

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

741

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

742

if (arg.getAttribute("direction")

743

== "out"):

744

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

745

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

685

if (if_tag.getAttribute(u"name")

686

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

687

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

688

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

689

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

690

if (arg.getAttribute(u"direction")

691

== u"out"):

692

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

693

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

694

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

695

if (arg.getAttribute(u"direction")

696

== u"out"):

697

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

698

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

746

699

document.unlink()

747

700

except (AttributeError, xml.dom.DOMException,

748

xml.parsers.expat.ExpatError) as error:

749

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

701

xml.parsers.expat.ExpatError), error:

702

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

750

703

error)

751

704

return xmlstring

752

705

760

713

"""

761

714

762

715

runtime_expansions = (Client.runtime_expansions

763

+ ("dbus_object_path",))

716

+ (u"dbus_object_path",))

764

717

765

718

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

766

719

771

724

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

772

725

# the D-Bus

773

726

client_object_name = unicode(self.name).translate(

774

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

775

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

727

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

728

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

776

729

self.dbus_object_path = (dbus.ObjectPath

777

("/clients/" + client_object_name))

730

(u"/clients/" + client_object_name))

778

731

DBusObjectWithProperties.__init__(self, self.bus,

779

732

self.dbus_object_path)

780

def _set_expires(self, value):

781

old_value = getattr(self, "_expires", None)

782

self._expires = value

783

if hasattr(self, "dbus_object_path") and old_value != value:

784

dbus_time = (self._datetime_to_dbus(self._expires,

785

variant_level=1))

786

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

787

dbus_time)

788

expires = property(lambda self: self._expires, _set_expires)

789

del _set_expires

790

733

791

734

def _get_approvals_pending(self):

792

735

return self._approvals_pending

797

740

if (hasattr(self, "dbus_object_path")

798

741

and bval is not bool(old_value)):

799

742

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

800

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

743

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

801

744

dbus_bool)

802

745

803

746

approvals_pending = property(_get_approvals_pending,

807

750

@staticmethod

808

751

def _datetime_to_dbus(dt, variant_level=0):

809

752

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

810

if dt is None:

811

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

812

753

return dbus.String(dt.isoformat(),

813

754

variant_level=variant_level)

814

755

815

756

def enable(self):

816

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

757

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

817

758

r = Client.enable(self)

818

759

if oldstate != self.enabled:

819

760

# Emit D-Bus signals

820

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

761

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

821

762

dbus.Boolean(True, variant_level=1))

822

763

self.PropertyChanged(

823

dbus.String("LastEnabled"),

764

dbus.String(u"LastEnabled"),

824

765

self._datetime_to_dbus(self.last_enabled,

825

766

variant_level=1))

826

767

return r

827

768

828

769

def disable(self, quiet = False):

829

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

770

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

830

771

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

831

772

if not quiet and oldstate != self.enabled:

832

773

# Emit D-Bus signal

833

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

774

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

834

775

dbus.Boolean(False, variant_level=1))

835

776

return r

836

777

839

780

self.remove_from_connection()

840

781

except LookupError:

841

782

pass

842

if hasattr(DBusObjectWithProperties, "__del__"):

783

if hasattr(DBusObjectWithProperties, u"__del__"):

843

784

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

844

785

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

845

786

848

789

self.checker_callback_tag = None

849

790

self.checker = None

850

791

# Emit D-Bus signal

851

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

792

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

852

793

dbus.Boolean(False, variant_level=1))

853

794

if os.WIFEXITED(condition):

854

795

exitstatus = os.WEXITSTATUS(condition)

866

807

*args, **kwargs)

867

808

868

809

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

869

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

810

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

870

811

# Emit D-Bus signal

871

812

self.PropertyChanged(

872

dbus.String("LastCheckedOK"),

813

dbus.String(u"LastCheckedOK"),

873

814

(self._datetime_to_dbus(self.last_checked_ok,

874

815

variant_level=1)))

875

876

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

877

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

878

# Emit D-Bus signal

879

self.PropertyChanged(

880

dbus.String("LastApprovalRequest"),

881

(self._datetime_to_dbus(self.last_approval_request,

882

variant_level=1)))

883

816

return r

884

817

885

818

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

895

828

# Emit D-Bus signal

896

829

self.CheckerStarted(self.current_checker_command)

897

830

self.PropertyChanged(

898

dbus.String("CheckerRunning"),

831

dbus.String(u"CheckerRunning"),

899

832

dbus.Boolean(True, variant_level=1))

900

833

return r

901

834

902

835

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

903

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

836

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

904

837

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

905

838

if (old_checker is not None

906

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

907

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

839

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

840

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

908

841

dbus.Boolean(False, variant_level=1))

909

842

return r

910

843

921

854

922

855

923

856

## D-Bus methods, signals & properties

924

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

857

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

925

858

926

859

## Signals

927

860

928

861

# CheckerCompleted - signal

929

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

862

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

930

863

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

931

864

"D-Bus signal"

932

865

pass

933

866

934

867

# CheckerStarted - signal

935

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

868

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

936

869

def CheckerStarted(self, command):

937

870

"D-Bus signal"

938

871

pass

939

872

940

873

# PropertyChanged - signal

941

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

874

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

942

875

def PropertyChanged(self, property, value):

943

876

"D-Bus signal"

944

877

pass

953

886

pass

954

887

955

888

# Rejected - signal

956

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

889

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

957

890

def Rejected(self, reason):

958

891

"D-Bus signal"

959

892

pass

960

893

961

894

# NeedApproval - signal

962

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

895

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

963

896

def NeedApproval(self, timeout, default):

964

897

"D-Bus signal"

965

return self.need_approval()

898

pass

966

899

967

900

## Methods

968

901

969

902

# Approve - method

970

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

903

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

971

904

def Approve(self, value):

972

905

self.approve(value)

973

906

974

907

# CheckedOK - method

975

908

@dbus.service.method(_interface)

976

909

def CheckedOK(self):

977

self.checked_ok()

910

return self.checked_ok()

978

911

979

912

# Enable - method

980

913

@dbus.service.method(_interface)

1002

935

## Properties

1003

936

1004

937

# ApprovalPending - property

1005

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

938

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

1006

939

def ApprovalPending_dbus_property(self):

1007

940

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

1008

941

1009

942

# ApprovedByDefault - property

1010

@dbus_service_property(_interface, signature="b",

1011

access="readwrite")

943

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

944

access=u"readwrite")

1012

945

def ApprovedByDefault_dbus_property(self, value=None):

1013

946

if value is None: # get

1014

947

return dbus.Boolean(self.approved_by_default)

1015

old_value = self.approved_by_default

1016

948

self.approved_by_default = bool(value)

1017

949

# Emit D-Bus signal

1018

if old_value != self.approved_by_default:

1019

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

1020

dbus.Boolean(value, variant_level=1))

950

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

951

dbus.Boolean(value, variant_level=1))

1021

952

1022

953

# ApprovalDelay - property

1023

@dbus_service_property(_interface, signature="t",

1024

access="readwrite")

954

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

955

access=u"readwrite")

1025

956

def ApprovalDelay_dbus_property(self, value=None):

1026

957

if value is None: # get

1027

958

return dbus.UInt64(self.approval_delay_milliseconds())

1028

old_value = self.approval_delay

1029

959

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

1030

960

# Emit D-Bus signal

1031

if old_value != self.approval_delay:

1032

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

1033

dbus.UInt64(value, variant_level=1))

961

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

962

dbus.UInt64(value, variant_level=1))

1034

963

1035

964

# ApprovalDuration - property

1036

@dbus_service_property(_interface, signature="t",

1037

access="readwrite")

965

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

966

access=u"readwrite")

1038

967

def ApprovalDuration_dbus_property(self, value=None):

1039

968

if value is None: # get

1040

969

return dbus.UInt64(self._timedelta_to_milliseconds(

1041

970

self.approval_duration))

1042

old_value = self.approval_duration

1043

971

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

1044

972

# Emit D-Bus signal

1045

if old_value != self.approval_duration:

1046

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

1047

dbus.UInt64(value, variant_level=1))

973

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

974

dbus.UInt64(value, variant_level=1))

1048

975

1049

976

# Name - property

1050

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

977

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

1051

978

def Name_dbus_property(self):

1052

979

return dbus.String(self.name)

1053

980

1054

981

# Fingerprint - property

1055

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

982

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

1056

983

def Fingerprint_dbus_property(self):

1057

984

return dbus.String(self.fingerprint)

1058

985

1059

986

# Host - property

1060

@dbus_service_property(_interface, signature="s",

1061

access="readwrite")

987

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

988

access=u"readwrite")

1062

989

def Host_dbus_property(self, value=None):

1063

990

if value is None: # get

1064

991

return dbus.String(self.host)

1065

old_value = self.host

1066

992

self.host = value

1067

993

# Emit D-Bus signal

1068

if old_value != self.host:

1069

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

1070

dbus.String(value, variant_level=1))

994

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

995

dbus.String(value, variant_level=1))

1071

996

1072

997

# Created - property

1073

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

998

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

1074

999

def Created_dbus_property(self):

1075

1000

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

1076

1001

1077

1002

# LastEnabled - property

1078

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

1003

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

1079

1004

def LastEnabled_dbus_property(self):

1080

return self._datetime_to_dbus(self.last_enabled)

1005

if self.last_enabled is None:

1006

return dbus.String(u"")

1007

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

1081

1008

1082

1009

# Enabled - property

1083

@dbus_service_property(_interface, signature="b",

1084

access="readwrite")

1010

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

1011

access=u"readwrite")

1085

1012

def Enabled_dbus_property(self, value=None):

1086

1013

if value is None: # get

1087

1014

return dbus.Boolean(self.enabled)

1091

1018

self.disable()

1092

1019

1093

1020

# LastCheckedOK - property

1094

@dbus_service_property(_interface, signature="s",

1095

access="readwrite")

1021

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

1022

access=u"readwrite")

1096

1023

def LastCheckedOK_dbus_property(self, value=None):

1097

1024

if value is not None:

1098

1025

self.checked_ok()

1099

1026

return

1100

return self._datetime_to_dbus(self.last_checked_ok)

1101

1102

# Expires - property

1103

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

1104

def Expires_dbus_property(self):

1105

return self._datetime_to_dbus(self.expires)

1106

1107

# LastApprovalRequest - property

1108

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

1109

def LastApprovalRequest_dbus_property(self):

1110

return self._datetime_to_dbus(self.last_approval_request)

1027

if self.last_checked_ok is None:

1028

return dbus.String(u"")

1029

return dbus.String(self._datetime_to_dbus(self

1030

.last_checked_ok))

1111

1031

1112

1032

# Timeout - property

1113

@dbus_service_property(_interface, signature="t",

1114

access="readwrite")

1033

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

1034

access=u"readwrite")

1115

1035

def Timeout_dbus_property(self, value=None):

1116

1036

if value is None: # get

1117

1037

return dbus.UInt64(self.timeout_milliseconds())

1118

old_value = self.timeout

1119

1038

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

1120

1039

# Emit D-Bus signal

1121

if old_value != self.timeout:

1122

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

1123

dbus.UInt64(value, variant_level=1))

1124

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

1040

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

1041

dbus.UInt64(value, variant_level=1))

1042

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

1125

1043

return

1126

1044

# Reschedule timeout

1127

1045

gobject.source_remove(self.disable_initiator_tag)

1128

1046

self.disable_initiator_tag = None

1129

self.expires = None

1130

1047

time_to_die = (self.

1131

1048

_timedelta_to_milliseconds((self

1132

1049

.last_checked_ok

1137

1054

# The timeout has passed

1138

1055

self.disable()

1139

1056

else:

1140

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

1141

+ datetime.timedelta(milliseconds = time_to_die))

1142

1057

self.disable_initiator_tag = (gobject.timeout_add

1143

1058

(time_to_die, self.disable))

1144

1145

# ExtendedTimeout - property

1146

@dbus_service_property(_interface, signature="t",

1147

access="readwrite")

1148

def ExtendedTimeout_dbus_property(self, value=None):

1149

if value is None: # get

1150

return dbus.UInt64(self.extended_timeout_milliseconds())

1151

old_value = self.extended_timeout

1152

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

1153

# Emit D-Bus signal

1154

if old_value != self.extended_timeout:

1155

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

1156

dbus.UInt64(value, variant_level=1))

1157

1059

1158

1060

# Interval - property

1159

@dbus_service_property(_interface, signature="t",

1160

access="readwrite")

1061

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

1062

access=u"readwrite")

1161

1063

def Interval_dbus_property(self, value=None):

1162

1064

if value is None: # get

1163

1065

return dbus.UInt64(self.interval_milliseconds())

1164

old_value = self.interval

1165

1066

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

1166

1067

# Emit D-Bus signal

1167

if old_value != self.interval:

1168

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

1169

dbus.UInt64(value, variant_level=1))

1170

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

1068

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

1069

dbus.UInt64(value, variant_level=1))

1070

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

1171

1071

return

1172

1072

# Reschedule checker run

1173

1073

gobject.source_remove(self.checker_initiator_tag)

1176

1076

self.start_checker() # Start one now, too

1177

1077

1178

1078

# Checker - property

1179

@dbus_service_property(_interface, signature="s",

1180

access="readwrite")

1079

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

1080

access=u"readwrite")

1181

1081

def Checker_dbus_property(self, value=None):

1182

1082

if value is None: # get

1183

1083

return dbus.String(self.checker_command)

1184

old_value = self.checker_command

1185

1084

self.checker_command = value

1186

1085

# Emit D-Bus signal

1187

if old_value != self.checker_command:

1188

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

1189

dbus.String(self.checker_command,

1190

variant_level=1))

1086

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

1087

dbus.String(self.checker_command,

1088

variant_level=1))

1191

1089

1192

1090

# CheckerRunning - property

1193

@dbus_service_property(_interface, signature="b",

1194

access="readwrite")

1091

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

1092

access=u"readwrite")

1195

1093

def CheckerRunning_dbus_property(self, value=None):

1196

1094

if value is None: # get

1197

1095

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

1201

1099

self.stop_checker()

1202

1100

1203

1101

# ObjectPath - property

1204

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

1102

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

1205

1103

def ObjectPath_dbus_property(self):

1206

1104

return self.dbus_object_path # is already a dbus.ObjectPath

1207

1105

1208

1106

# Secret = property

1209

@dbus_service_property(_interface, signature="ay",

1210

access="write", byte_arrays=True)

1107

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

1108

access=u"write", byte_arrays=True)

1211

1109

def Secret_dbus_property(self, value):

1212

1110

self.secret = str(value)

1213

1111

1248

1146

1249

1147

def handle(self):

1250

1148

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

1251

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

1149

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

1252

1150

unicode(self.client_address))

1253

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

1151

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

1254

1152

self.server.child_pipe.fileno())

1255

1153

1256

1154

session = (gnutls.connection

1263

1161

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

1264

1162

# here despite using OpenPGP certificates.

1265

1163

1266

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

1267

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

1268

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

1269

# "+DHE-DSS"))

1164

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

1165

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

1166

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

1167

# u"+DHE-DSS"))

1270

1168

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

1271

1169

priority = self.server.gnutls_priority

1272

1170

if priority is None:

1273

priority = "NORMAL"

1171

priority = u"NORMAL"

1274

1172

(gnutls.library.functions

1275

1173

.gnutls_priority_set_direct(session._c_object,

1276

1174

priority, None))

1278

1176

# Start communication using the Mandos protocol

1279

1177

# Get protocol number

1280

1178

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

1281

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

1179

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

1282

1180

try:

1283

1181

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

1284

1182

raise RuntimeError

1285

except (ValueError, IndexError, RuntimeError) as error:

1286

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

1183

except (ValueError, IndexError, RuntimeError), error:

1184

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

1287

1185

return

1288

1186

1289

1187

# Start GnuTLS connection

1290

1188

try:

1291

1189

session.handshake()

1292

except gnutls.errors.GNUTLSError as error:

1293

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

1190

except gnutls.errors.GNUTLSError, error:

1191

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

1294

1192

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

1295

1193

# established. Just abandon the request.

1296

1194

return

1297

logger.debug("Handshake succeeded")

1195

logger.debug(u"Handshake succeeded")

1298

1196

1299

1197

approval_required = False

1300

1198

try:

1301

1199

try:

1302

1200

fpr = self.fingerprint(self.peer_certificate

1303

1201

(session))

1304

except (TypeError,

1305

gnutls.errors.GNUTLSError) as error:

1306

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

1202

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

1203

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

1307

1204

return

1308

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

1205

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

1309

1206

1310

1207

try:

1311

1208

client = ProxyClient(child_pipe, fpr,

1320

1217

1321

1218

while True:

1322

1219

if not client.enabled:

1323

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

1220

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

1324

1221

client.name)

1325

1222

if self.server.use_dbus:

1326

1223

# Emit D-Bus signal

1331

1228

#We are approved or approval is disabled

1332

1229

break

1333

1230

elif client._approved is None:

1334

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

1231

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

1335

1232

client.name)

1336

1233

if self.server.use_dbus:

1337

1234

# Emit D-Bus signal

1339

1236

client.approval_delay_milliseconds(),

1340

1237

client.approved_by_default)

1341

1238

else:

1342

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

1239

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

1343

1240

client.name)

1344

1241

if self.server.use_dbus:

1345

1242

# Emit D-Bus signal

1371

1268

while sent_size < len(client.secret):

1372

1269

try:

1373

1270

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

1374

except gnutls.errors.GNUTLSError as error:

1271

except (gnutls.errors.GNUTLSError), error:

1375

1272

logger.warning("gnutls send failed")

1376

1273

return

1377

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

1274

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

1378

1275

sent, len(client.secret)

1379

1276

- (sent_size + sent))

1380

1277

sent_size += sent

1381

1278

1382

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

1279

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

1383

1280

# bump the timeout as if seen

1384

client.checked_ok(client.extended_timeout)

1281

client.checked_ok()

1385

1282

if self.server.use_dbus:

1386

1283

# Emit D-Bus signal

1387

1284

client.GotSecret()

1391

1288

client.approvals_pending -= 1

1392

1289

try:

1393

1290

session.bye()

1394

except gnutls.errors.GNUTLSError as error:

1291

except (gnutls.errors.GNUTLSError), error:

1395

1292

logger.warning("GnuTLS bye failed")

1396

1293

1397

1294

@staticmethod

1408

1305

.gnutls_certificate_get_peers

1409

1306

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

1410

1307

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

1411

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

1412

" certificate")

1308

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

1309

u" certificate")

1413

1310

if list_size.value == 0:

1414

1311

return None

1415

1312

cert = cert_list[0]

1441

1338

if crtverify.value != 0:

1442

1339

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1443

1340

raise (gnutls.errors.CertificateSecurityError

1444

("Verify failed"))

1341

(u"Verify failed"))

1445

1342

# New buffer for the fingerprint

1446

1343

buf = ctypes.create_string_buffer(20)

1447

1344

buf_len = ctypes.c_size_t()

1454

1351

# Convert the buffer to a Python bytestring

1455

1352

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

1456

1353

# Convert the bytestring to hexadecimal notation

1457

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

1354

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

1458

1355

return hex_fpr

1459

1356

1460

1357

1488

1385

1489

1386

def add_pipe(self, parent_pipe):

1490

1387

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

1491

raise NotImplementedError

1388

pass

1492

1389

1493

1390

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1494

1391

socketserver.TCPServer, object):

1512

1409

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

1513

1410

if self.interface is not None:

1514

1411

if SO_BINDTODEVICE is None:

1515

logger.error("SO_BINDTODEVICE does not exist;"

1516

" cannot bind to interface %s",

1412

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

1413

u" cannot bind to interface %s",

1517

1414

self.interface)

1518

1415

else:

1519

1416

try:

1520

1417

self.socket.setsockopt(socket.SOL_SOCKET,

1521

1418

SO_BINDTODEVICE,

1522

1419

str(self.interface

1523

+ '\0'))

1524

except socket.error as error:

1420

+ u'\0'))

1421

except socket.error, error:

1525

1422

if error[0] == errno.EPERM:

1526

logger.error("No permission to"

1527

" bind to interface %s",

1423

logger.error(u"No permission to"

1424

u" bind to interface %s",

1528

1425

self.interface)

1529

1426

elif error[0] == errno.ENOPROTOOPT:

1530

logger.error("SO_BINDTODEVICE not available;"

1531

" cannot bind to interface %s",

1427

logger.error(u"SO_BINDTODEVICE not available;"

1428

u" cannot bind to interface %s",

1532

1429

self.interface)

1533

1430

else:

1534

1431

raise

1536

1433

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

1537

1434

if not self.server_address[0]:

1538

1435

if self.address_family == socket.AF_INET6:

1539

any_address = "::" # in6addr_any

1436

any_address = u"::" # in6addr_any

1540

1437

else:

1541

1438

any_address = socket.INADDR_ANY

1542

1439

self.server_address = (any_address,

1591

1488

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

1592

1489

client_object=None):

1593

1490

condition_names = {

1594

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

1595

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

1491

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

1492

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

1596

1493

# blocking).

1597

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

1598

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

1599

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

1494

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

1495

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

1496

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

1600

1497

# broken, usually for pipes and

1601

1498

# sockets).

1602

1499

}

1621

1518

client = c

1622

1519

break

1623

1520

else:

1624

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

1625

"dress: %s", fpr, address)

1521

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

1522

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

1626

1523

if self.use_dbus:

1627

1524

# Emit D-Bus signal

1628

1525

mandos_dbus_service.ClientNotFound(fpr, address[0])

1662

1559

def string_to_delta(interval):

1663

1560

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

1664

1561

1665

>>> string_to_delta('7d')

1562

>>> string_to_delta(u'7d')

1666

1563

datetime.timedelta(7)

1667

>>> string_to_delta('60s')

1564

>>> string_to_delta(u'60s')

1668

1565

datetime.timedelta(0, 60)

1669

>>> string_to_delta('60m')

1566

>>> string_to_delta(u'60m')

1670

1567

datetime.timedelta(0, 3600)

1671

>>> string_to_delta('24h')

1568

>>> string_to_delta(u'24h')

1672

1569

datetime.timedelta(1)

1673

>>> string_to_delta('1w')

1570

>>> string_to_delta(u'1w')

1674

1571

datetime.timedelta(7)

1675

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

1572

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

1676

1573

datetime.timedelta(0, 330)

1677

1574

"""

1678

1575

timevalue = datetime.timedelta(0)

1680

1577

try:

1681

1578

suffix = unicode(s[-1])

1682

1579

value = int(s[:-1])

1683

if suffix == "d":

1580

if suffix == u"d":

1684

1581

delta = datetime.timedelta(value)

1685

elif suffix == "s":

1582

elif suffix == u"s":

1686

1583

delta = datetime.timedelta(0, value)

1687

elif suffix == "m":

1584

elif suffix == u"m":

1688

1585

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

1689

elif suffix == "h":

1586

elif suffix == u"h":

1690

1587

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

1691

elif suffix == "w":

1588

elif suffix == u"w":

1692

1589

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

1693

1590

else:

1694

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

1695

except (ValueError, IndexError) as e:

1696

raise ValueError(*(e.args))

1591

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

1592

except (ValueError, IndexError), e:

1593

raise ValueError(e.message)

1697

1594

timevalue += delta

1698

1595

return timevalue

1699

1596

1705

1602

global if_nametoindex

1706

1603

try:

1707

1604

if_nametoindex = (ctypes.cdll.LoadLibrary

1708

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

1605

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

1709

1606

.if_nametoindex)

1710

1607

except (OSError, AttributeError):

1711

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

1608

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

1712

1609

def if_nametoindex(interface):

1713

1610

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

1714

1611

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

1715

1612

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

1716

1613

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1717

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

1614

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

1718

1615

interface))

1719

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

1616

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

1720

1617

ifreq[16:20])[0]

1721

1618

return interface_index

1722

1619

return if_nametoindex(interface)

1730

1627

sys.exit()

1731

1628

os.setsid()

1732

1629

if not nochdir:

1733

os.chdir("/")

1630

os.chdir(u"/")

1734

1631

if os.fork():

1735

1632

sys.exit()

1736

1633

if not noclose:

1738

1635

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

1739

1636

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

1740

1637

raise OSError(errno.ENODEV,

1741

"%s not a character device"

1638

u"%s not a character device"

1742

1639

% os.path.devnull)

1743

1640

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

1744

1641

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

1752

1649

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

1753

1650

# Parsing of options, both command line and config file

1754

1651

1755

parser = argparse.ArgumentParser()

1756

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

1757

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

1758

help="show version number and exit")

1759

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

1760

help="Bind to interface IF")

1761

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

1762

help="Address to listen for requests on")

1763

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

1764

help="Port number to receive requests on")

1765

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

1766

help="Run self-test")

1767

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

1768

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

1769

" to terminal")

1770

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

1771

help="Debug level for stdout output")

1772

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

1773

" priority string (see GnuTLS documentation)")

1774

parser.add_argument("--servicename",

1775

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

1776

parser.add_argument("--configdir",

1777

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

1778

help="Directory to search for configuration"

1779

" files")

1780

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

1781

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

1782

" system bus interface")

1783

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

1784

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

1785

options = parser.parse_args()

1652

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

1653

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

1654

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

1655

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

1656

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

1657

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

1658

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

1659

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

1660

help=u"Run self-test")

1661

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

1662

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

1663

u" terminal")

1664

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

1665

help=u"Debug level for stdout output")

1666

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

1667

u" priority string (see GnuTLS documentation)")

1668

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

1669

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

1670

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

1671

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

1672

help=u"Directory to search for configuration"

1673

u" files")

1674

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

1675

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

1676

u" system bus interface")

1677

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

1678

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

1679

options = parser.parse_args()[0]

1786

1680

1787

1681

if options.check:

1788

1682

import doctest

1790

1684

sys.exit()

1791

1685

1792

1686

# Default values for config file for server-global settings

1793

server_defaults = { "interface": "",

1794

"address": "",

1795

"port": "",

1796

"debug": "False",

1797

"priority":

1798

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

1799

"servicename": "Mandos",

1800

"use_dbus": "True",

1801

"use_ipv6": "True",

1802

"debuglevel": "",

1687

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

1688

u"address": u"",

1689

u"port": u"",

1690

u"debug": u"False",

1691

u"priority":

1692

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

1693

u"servicename": u"Mandos",

1694

u"use_dbus": u"True",

1695

u"use_ipv6": u"True",

1696

u"debuglevel": u"",

1803

1697

}

1804

1698

1805

1699

# Parse config file for server-global settings

1806

1700

server_config = configparser.SafeConfigParser(server_defaults)

1807

1701

del server_defaults

1808

1702

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

1809

"mandos.conf"))

1703

u"mandos.conf"))

1810

1704

# Convert the SafeConfigParser object to a dict

1811

1705

server_settings = server_config.defaults()

1812

1706

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

1813

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

1814

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

1707

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

1708

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

1815

1709

option)

1816

1710

if server_settings["port"]:

1817

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

1818

"port")

1711

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

1712

u"port")

1819

1713

del server_config

1820

1714

1821

1715

# Override the settings from the config file with command line

1822

1716

# options, if set.

1823

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

1824

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

1825

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

1717

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

1718

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

1719

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

1826

1720

value = getattr(options, option)

1827

1721

if value is not None:

1828

1722

server_settings[option] = value

1836

1730

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

1837

1731

1838

1732

# For convenience

1839

debug = server_settings["debug"]

1840

debuglevel = server_settings["debuglevel"]

1841

use_dbus = server_settings["use_dbus"]

1842

use_ipv6 = server_settings["use_ipv6"]

1733

debug = server_settings[u"debug"]

1734

debuglevel = server_settings[u"debuglevel"]

1735

use_dbus = server_settings[u"use_dbus"]

1736

use_ipv6 = server_settings[u"use_ipv6"]

1843

1737

1844

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

1738

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

1845

1739

syslogger.setFormatter(logging.Formatter

1846

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

1847

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

1848

% server_settings["servicename"]))

1740

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

1741

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

1742

% server_settings[u"servicename"]))

1849

1743

1850

1744

# Parse config file with clients

1851

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

1852

"extended_timeout": "15m",

1853

"interval": "2m",

1854

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

1855

"host": "",

1856

"approval_delay": "0s",

1857

"approval_duration": "1s",

1745

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

1746

u"interval": u"5m",

1747

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

1748

u"host": u"",

1749

u"approval_delay": u"0s",

1750

u"approval_duration": u"1s",

1858

1751

}

1859

1752

client_config = configparser.SafeConfigParser(client_defaults)

1860

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

1861

"clients.conf"))

1753

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

1754

u"clients.conf"))

1862

1755

1863

1756

global mandos_dbus_service

1864

1757

mandos_dbus_service = None

1865

1758

1866

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

1867

server_settings["port"]),

1759

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

1760

server_settings[u"port"]),

1868

1761

ClientHandler,

1869

interface=(server_settings["interface"]

1762

interface=(server_settings[u"interface"]

1870

1763

or None),

1871

1764

use_ipv6=use_ipv6,

1872

1765

gnutls_priority=

1873

server_settings["priority"],

1766

server_settings[u"priority"],

1874

1767

use_dbus=use_dbus)

1875

1768

if not debug:

1876

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

1769

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

1877

1770

try:

1878

pidfile = open(pidfilename, "w")

1771

pidfile = open(pidfilename, u"w")

1879

1772

except IOError:

1880

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

1773

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

1881

1774

1882

1775

try:

1883

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

1884

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

1776

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

1777

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

1885

1778

except KeyError:

1886

1779

try:

1887

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

1888

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

1780

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

1781

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

1889

1782

except KeyError:

1890

1783

try:

1891

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

1892

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

1784

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

1785

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

1893

1786

except KeyError:

1894

1787

uid = 65534

1895

1788

gid = 65534

1896

1789

try:

1897

1790

os.setgid(gid)

1898

1791

os.setuid(uid)

1899

except OSError as error:

1792

except OSError, error:

1900

1793

if error[0] != errno.EPERM:

1901

1794

raise error

1902

1795

1917

1810

1918

1811

@gnutls.library.types.gnutls_log_func

1919

1812

def debug_gnutls(level, string):

1920

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

1813

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

1921

1814

1922

1815

(gnutls.library.functions

1923

1816

.gnutls_global_set_log_function(debug_gnutls))

1931

1824

# No console logging

1932

1825

logger.removeHandler(console)

1933

1826

1934

# Need to fork before connecting to D-Bus

1935

if not debug:

1936

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

1937

daemon()

1938

1827

1939

1828

global main_loop

1940

1829

# From the Avahi example code

1944

1833

# End of Avahi example code

1945

1834

if use_dbus:

1946

1835

try:

1947

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

1836

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

1948

1837

bus, do_not_queue=True)

1949

except dbus.exceptions.NameExistsException as e:

1950

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

1838

except dbus.exceptions.NameExistsException, e:

1839

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

1951

1840

use_dbus = False

1952

server_settings["use_dbus"] = False

1841

server_settings[u"use_dbus"] = False

1953

1842

tcp_server.use_dbus = False

1954

1843

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1955

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

1956

servicetype = "_mandos._tcp",

1844

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

1845

servicetype = u"_mandos._tcp",

1957

1846

protocol = protocol, bus = bus)

1958

1847

if server_settings["interface"]:

1959

1848

service.interface = (if_nametoindex

1960

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

1961

1849

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

1850

1851

if not debug:

1852

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

1853

daemon()

1854

1962

1855

global multiprocessing_manager

1963

1856

multiprocessing_manager = multiprocessing.Manager()

1964

1857

1983

1876

client_config, section)))

1984

1877

for section in client_config.sections()))

1985

1878

if not tcp_server.clients:

1986

logger.warning("No clients defined")

1879

logger.warning(u"No clients defined")

1987

1880

1988

1881

if not debug:

1989

1882

try:

1990

1883

with pidfile:

1991

1884

pid = os.getpid()

1992

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

1885

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

1993

1886

del pidfile

1994

1887

except IOError:

1995

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

1888

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

1996

1889

pidfilename, pid)

1997

1890

except NameError:

1998

1891

# "pidfile" was never created

2008

1901

class MandosDBusService(dbus.service.Object):

2009

1902

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

2010

1903

def __init__(self):

2011

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

2012

_interface = "se.bsnet.fukt.Mandos"

1904

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

1905

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

2013

1906

2014

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

1907

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

2015

1908

def ClientAdded(self, objpath):

2016

1909

"D-Bus signal"

2017

1910

pass

2018

1911

2019

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

1912

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

2020

1913

def ClientNotFound(self, fingerprint, address):

2021

1914

"D-Bus signal"

2022

1915

pass

2023

1916

2024

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

1917

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

2025

1918

def ClientRemoved(self, objpath, name):

2026

1919

"D-Bus signal"

2027

1920

pass

2028

1921

2029

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

1922

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

2030

1923

def GetAllClients(self):

2031

1924

"D-Bus method"

2032

1925

return dbus.Array(c.dbus_object_path

2033

1926

for c in tcp_server.clients)

2034

1927

2035

1928

@dbus.service.method(_interface,

2036

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

1929

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

2037

1930

def GetAllClientsWithProperties(self):

2038

1931

"D-Bus method"

2039

1932

return dbus.Dictionary(

2040

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

1933

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

2041

1934

for c in tcp_server.clients),

2042

signature="oa{sv}")

1935

signature=u"oa{sv}")

2043

1936

2044

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

1937

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

2045

1938

def RemoveClient(self, object_path):

2046

1939

"D-Bus method"

2047

1940

for c in tcp_server.clients:

2089

1982

# Find out what port we got

2090

1983

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

2091

1984

if use_ipv6:

2092

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

1985

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

2093

1986

" flowinfo %d, scope_id %d"

2094

1987

% tcp_server.socket.getsockname())

2095

1988

else: # IPv4

2096

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

1989

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

2097

1990

% tcp_server.socket.getsockname())

2098

1991

2099

1992

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

2102

1995

# From the Avahi example code

2103

1996

try:

2104

1997

service.activate()

2105

except dbus.exceptions.DBusException as error:

2106

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

1998

except dbus.exceptions.DBusException, error:

1999

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

2107

2000

cleanup()

2108

2001

sys.exit(1)

2109

2002

# End of Avahi example code

2113

2006

(tcp_server.handle_request

2114

2007

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

2115

2008

2116

logger.debug("Starting main loop")

2009

logger.debug(u"Starting main loop")

2117

2010

main_loop.run()

2118

except AvahiError as error:

2119

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

2011

except AvahiError, error:

2012

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

2120

2013

cleanup()

2121

2014

sys.exit(1)

2122

2015

except KeyboardInterrupt:

2123

2016

if debug:

2124

print("", file=sys.stderr)

2125

logger.debug("Server received KeyboardInterrupt")

2126

logger.debug("Server exiting")

2017

print >> sys.stderr

2018

logger.debug(u"Server received KeyboardInterrupt")

2019

logger.debug(u"Server exiting")

2127

2020

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

2128

2021

cleanup()

2129

2022