/mandos/trunk : revision 491

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

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#

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# Everything else is

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#

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

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

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

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#

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from __future__ import division, with_statement, absolute_import

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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import socket

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import optparse

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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SO_BINDTODEVICE = None

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version = "1.0.14"

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version = "1.3.1"

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

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logger = logging.Logger(u'mandos')

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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

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syslogger.setFormatter(logging.Formatter

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

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u' %(message)s'))

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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u' %(levelname)s:'

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u' %(message)s'))

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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Attributes:

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

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Used to optionally bind to the specified interface.

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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"""

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

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.group = None # our entry group

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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u" after %i retries, exiting.",

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError(u"Too many renames")

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raise AvahiServiceError("Too many renames")

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

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

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException, error:

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

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except dbus.exceptions.DBusException as error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.group.connect_to_signal('StateChanged',

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self

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.entry_group_state_changed)

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

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self .entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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self.interface,

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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

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logger.debug("Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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

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unicode(error))

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raise AvahiGroupError(u"State changed: %s"

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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self.group.Free()

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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pass

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self.group = None

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def server_state_changed(self, state):

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self.remove()

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

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

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

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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else:

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

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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else:

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if error is None:

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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avahi.DBUS_PATH_SERVER),

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avahi.DBUS_PATH_SERVER,

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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal(u"StateChanged",

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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

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

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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: - '' -

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checker_callback_tag: a gobject event source tag, or None

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checker_command: string; External command which is run to check

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if client lives. %() expansions are done at

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

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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: - '' -

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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uniquely identify the client

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host: string; available for use by the checker command

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

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

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

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last_enabled: datetime.datetime(); (UTC)

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runtime_expansions: Allowed attributes for runtime expansion.

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"""

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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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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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@staticmethod

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def _timedelta_to_milliseconds(td):

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self.name = name

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if config is None:

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config = {}

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

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

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

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

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

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if u"secret" in config:

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

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elif u"secfile" in config:

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

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.replace(" ", ""))

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

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if "secret" in config:

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

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elif "secfile" in config:

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

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(config[u"secfile"])),

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(config["secfile"])),

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"rb") as secfile:

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self.secret = secfile.read()

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else:

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

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

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% self.name)

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

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

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self.created = datetime.datetime.utcnow()

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self.enabled = False

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self.last_approval_request = None

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self.last_enabled = None

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self.last_checked_ok = None

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

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

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

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

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self.disable_hook = disable_hook

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

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self.checker_callback_tag = None

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self.checker_command = config[u"checker"]

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self.checker_command = config["checker"]

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self.current_checker_command = None

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self.last_connect = None

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self._approved = None

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

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

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True)

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self.approvals_pending = 0

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self.approval_delay = string_to_delta(

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config[u"approval_delay"])

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config["approval_delay"])

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self.approval_duration = string_to_delta(

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config[u"approval_duration"])

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config["approval_duration"])

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

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def send_changedstate(self):

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def enable(self):

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

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

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

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# Already enabled

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return

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self.send_changedstate()

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

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

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

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

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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

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

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = None

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self.stop_checker()

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if os.WIFEXITED(condition):

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exitstatus = os.WEXITSTATUS(condition)

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if exitstatus == 0:

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

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

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vars(self))

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self.checked_ok()

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else:

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

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

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vars(self))

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else:

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

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

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vars(self))

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def checked_ok(self):

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(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), error:

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except (AttributeError, OSError) as error:

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if (isinstance(error, OSError)

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477

and error.errno != errno.ECHILD):

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raise error

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else:

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if pid:

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

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logger.warning("Checker was a zombie")

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback(pid, status,

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self.current_checker_command)

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# 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, u"")),

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

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errors=

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u'replace')))

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'replace')))

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for attr in

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self.runtime_expansions)

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try:

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command = self.checker_command % escaped_attrs

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except TypeError, error:

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

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

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except TypeError as error:

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

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' %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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try:

475

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

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

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command, self.name)

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

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

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# always replaced by /dev/null.)

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self.checker = subprocess.Popen(command,

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close_fds=True,

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shell=True, cwd=u"/")

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shell=True, cwd="/")

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self.checker_callback_tag = (gobject.child_watch_add

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(self.checker.pid,

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self.checker_callback,

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if pid:

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback(pid, status, command)

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except OSError, error:

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

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except OSError as error:

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

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error)

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

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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, u"checker", None) is None:

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

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return

507

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

540

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

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541

try:

509

542

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)

513

except OSError, error:

546

except OSError as error:

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547

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=u"v",

519

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

551

def dbus_service_property(dbus_interface, signature="v",

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access="readwrite", byte_arrays=False):

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"""Decorators for marking methods of a DBusObjectWithProperties to

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become properties on the D-Bus.

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555

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"""

530

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

531

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

532

if byte_arrays and signature != u"ay":

533

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

534

u" signature %r" % signature)

565

if byte_arrays and signature != "ay":

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

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" signature %r" % signature)

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def decorator(func):

536

569

func._dbus_is_property = True

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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__

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

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

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

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

576

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

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return func

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return decorator

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579

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@staticmethod

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def _is_dbus_property(obj):

577

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

610

return getattr(obj, "_dbus_is_property", False)

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def _get_all_dbus_properties(self):

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613

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

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621

property with the specified name and interface.

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"""

590

623

for name in (property_name,

591

property_name + u"_dbus_property"):

624

property_name + "_dbus_property"):

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prop = getattr(self, name, None)

593

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if (prop is None

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or not self._is_dbus_property(prop)

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631

continue

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return prop

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# No such property

601

raise DBusPropertyNotFound(self.dbus_object_path + u":"

602

+ interface_name + u"."

634

raise DBusPropertyNotFound(self.dbus_object_path + ":"

635

+ interface_name + "."

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+ property_name)

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

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out_signature=u"v")

638

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

639

out_signature="v")

607

640

def Get(self, interface_name, property_name):

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641

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

609

642

"""

610

643

prop = self._get_dbus_property(interface_name, property_name)

611

if prop._dbus_access == u"write":

644

if prop._dbus_access == "write":

612

645

raise DBusPropertyAccessException(property_name)

613

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value = prop()

614

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

647

if not hasattr(value, "variant_level"):

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return value

616

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

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650

618

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

651

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

619

652

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

620

653

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

621

654

"""

622

655

prop = self._get_dbus_property(interface_name, property_name)

623

if prop._dbus_access == u"read":

656

if prop._dbus_access == "read":

624

657

raise DBusPropertyAccessException(property_name)

625

if prop._dbus_get_args_options[u"byte_arrays"]:

658

if prop._dbus_get_args_options["byte_arrays"]:

626

659

# The byte_arrays option is not supported yet on

627

660

# signatures other than "ay".

628

if prop._dbus_signature != u"ay":

661

if prop._dbus_signature != "ay":

629

662

raise ValueError

630

663

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

631

664

for byte in value))

632

665

prop(value)

633

666

634

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

635

out_signature=u"a{sv}")

667

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

668

out_signature="a{sv}")

636

669

def GetAll(self, interface_name):

637

670

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

638

671

standard.

646

679

# Interface non-empty but did not match

647

680

continue

648

681

# Ignore write-only properties

649

if prop._dbus_access == u"write":

682

if prop._dbus_access == "write":

650

683

continue

651

684

value = prop()

652

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

685

if not hasattr(value, "variant_level"):

653

686

all[name] = value

654

687

continue

655

688

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

656

689

value.variant_level+1)

657

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

690

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

658

691

659

692

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

660

out_signature=u"s",

693

out_signature="s",

661

694

path_keyword='object_path',

662

695

connection_keyword='connection')

663

696

def Introspect(self, object_path, connection):

668

701

try:

669

702

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

670

703

def make_tag(document, name, prop):

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)

704

e = document.createElement("property")

705

e.setAttribute("name", name)

706

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

707

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

675

708

return e

676

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

709

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

677

710

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

678

711

for name, prop

679

712

in self._get_all_dbus_properties()

680

713

if prop._dbus_interface

681

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

714

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

682

715

if_tag.appendChild(tag)

683

716

# Add the names to the return values for the

684

717

# "org.freedesktop.DBus.Properties" methods

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")

718

if (if_tag.getAttribute("name")

719

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

720

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

721

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

722

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

723

if (arg.getAttribute("direction")

724

== "out"):

725

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

726

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

727

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

728

if (arg.getAttribute("direction")

729

== "out"):

730

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

731

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

699

732

document.unlink()

700

733

except (AttributeError, xml.dom.DOMException,

701

xml.parsers.expat.ExpatError), error:

702

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

734

xml.parsers.expat.ExpatError) as error:

735

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

703

736

error)

704

737

return xmlstring

705

738

713

746

"""

714

747

715

748

runtime_expansions = (Client.runtime_expansions

716

+ (u"dbus_object_path",))

749

+ ("dbus_object_path",))

717

750

718

751

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

719

752

724

757

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

725

758

# the D-Bus

726

759

client_object_name = unicode(self.name).translate(

727

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

728

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

760

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

761

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

729

762

self.dbus_object_path = (dbus.ObjectPath

730

(u"/clients/" + client_object_name))

763

("/clients/" + client_object_name))

731

764

DBusObjectWithProperties.__init__(self, self.bus,

732

765

self.dbus_object_path)

733

766

740

773

if (hasattr(self, "dbus_object_path")

741

774

and bval is not bool(old_value)):

742

775

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

743

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

776

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

744

777

dbus_bool)

745

778

746

779

approvals_pending = property(_get_approvals_pending,

754

787

variant_level=variant_level)

755

788

756

789

def enable(self):

757

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

790

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

758

791

r = Client.enable(self)

759

792

if oldstate != self.enabled:

760

793

# Emit D-Bus signals

761

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

794

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

762

795

dbus.Boolean(True, variant_level=1))

763

796

self.PropertyChanged(

764

dbus.String(u"LastEnabled"),

797

dbus.String("LastEnabled"),

765

798

self._datetime_to_dbus(self.last_enabled,

766

799

variant_level=1))

767

800

return r

768

801

769

802

def disable(self, quiet = False):

770

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

803

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

771

804

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

772

805

if not quiet and oldstate != self.enabled:

773

806

# Emit D-Bus signal

774

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

807

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

775

808

dbus.Boolean(False, variant_level=1))

776

809

return r

777

810

780

813

self.remove_from_connection()

781

814

except LookupError:

782

815

pass

783

if hasattr(DBusObjectWithProperties, u"__del__"):

816

if hasattr(DBusObjectWithProperties, "__del__"):

784

817

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

785

818

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

786

819

789

822

self.checker_callback_tag = None

790

823

self.checker = None

791

824

# Emit D-Bus signal

792

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

825

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

793

826

dbus.Boolean(False, variant_level=1))

794

827

if os.WIFEXITED(condition):

795

828

exitstatus = os.WEXITSTATUS(condition)

807

840

*args, **kwargs)

808

841

809

842

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

810

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

843

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

811

844

# Emit D-Bus signal

812

845

self.PropertyChanged(

813

dbus.String(u"LastCheckedOK"),

846

dbus.String("LastCheckedOK"),

814

847

(self._datetime_to_dbus(self.last_checked_ok,

815

848

variant_level=1)))

849

850

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

851

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

852

# Emit D-Bus signal

853

self.PropertyChanged(

854

dbus.String("LastApprovalRequest"),

855

(self._datetime_to_dbus(self.last_approval_request,

856

variant_level=1)))

816

857

return r

817

858

818

859

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

828

869

# Emit D-Bus signal

829

870

self.CheckerStarted(self.current_checker_command)

830

871

self.PropertyChanged(

831

dbus.String(u"CheckerRunning"),

872

dbus.String("CheckerRunning"),

832

873

dbus.Boolean(True, variant_level=1))

833

874

return r

834

875

835

876

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

836

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

877

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

837

878

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

838

879

if (old_checker is not None

839

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

840

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

880

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

881

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

841

882

dbus.Boolean(False, variant_level=1))

842

883

return r

843

884

854

895

855

896

856

897

## D-Bus methods, signals & properties

857

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

898

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

858

899

859

900

## Signals

860

901

861

902

# CheckerCompleted - signal

862

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

903

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

863

904

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

864

905

"D-Bus signal"

865

906

pass

866

907

867

908

# CheckerStarted - signal

868

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

909

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

869

910

def CheckerStarted(self, command):

870

911

"D-Bus signal"

871

912

pass

872

913

873

914

# PropertyChanged - signal

874

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

915

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

875

916

def PropertyChanged(self, property, value):

876

917

"D-Bus signal"

877

918

pass

886

927

pass

887

928

888

929

# Rejected - signal

889

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

930

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

890

931

def Rejected(self, reason):

891

932

"D-Bus signal"

892

933

pass

893

934

894

935

# NeedApproval - signal

895

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

936

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

896

937

def NeedApproval(self, timeout, default):

897

938

"D-Bus signal"

898

pass

939

return self.need_approval()

899

940

900

941

## Methods

901

942

902

943

# Approve - method

903

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

944

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

904

945

def Approve(self, value):

905

946

self.approve(value)

906

947

907

948

# CheckedOK - method

908

949

@dbus.service.method(_interface)

909

950

def CheckedOK(self):

910

return self.checked_ok()

951

self.checked_ok()

911

952

912

953

# Enable - method

913

954

@dbus.service.method(_interface)

935

976

## Properties

936

977

937

978

# ApprovalPending - property

938

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

979

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

939

980

def ApprovalPending_dbus_property(self):

940

981

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

941

982

942

983

# ApprovedByDefault - property

943

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

944

access=u"readwrite")

984

@dbus_service_property(_interface, signature="b",

985

access="readwrite")

945

986

def ApprovedByDefault_dbus_property(self, value=None):

946

987

if value is None: # get

947

988

return dbus.Boolean(self.approved_by_default)

948

989

self.approved_by_default = bool(value)

949

990

# Emit D-Bus signal

950

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

991

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

951

992

dbus.Boolean(value, variant_level=1))

952

993

953

994

# ApprovalDelay - property

954

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

955

access=u"readwrite")

995

@dbus_service_property(_interface, signature="t",

996

access="readwrite")

956

997

def ApprovalDelay_dbus_property(self, value=None):

957

998

if value is None: # get

958

999

return dbus.UInt64(self.approval_delay_milliseconds())

959

1000

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

960

1001

# Emit D-Bus signal

961

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

1002

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

962

1003

dbus.UInt64(value, variant_level=1))

963

1004

964

1005

# ApprovalDuration - property

965

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

966

access=u"readwrite")

1006

@dbus_service_property(_interface, signature="t",

1007

access="readwrite")

967

1008

def ApprovalDuration_dbus_property(self, value=None):

968

1009

if value is None: # get

969

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

970

1011

self.approval_duration))

971

1012

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

972

1013

# Emit D-Bus signal

973

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

1014

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

974

1015

dbus.UInt64(value, variant_level=1))

975

1016

976

1017

# Name - property

977

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

1018

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

978

1019

def Name_dbus_property(self):

979

1020

return dbus.String(self.name)

980

1021

981

1022

# Fingerprint - property

982

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

1023

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

983

1024

def Fingerprint_dbus_property(self):

984

1025

return dbus.String(self.fingerprint)

985

1026

986

1027

# Host - property

987

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

988

access=u"readwrite")

1028

@dbus_service_property(_interface, signature="s",

1029

access="readwrite")

989

1030

def Host_dbus_property(self, value=None):

990

1031

if value is None: # get

991

1032

return dbus.String(self.host)

992

1033

self.host = value

993

1034

# Emit D-Bus signal

994

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

1035

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

995

1036

dbus.String(value, variant_level=1))

996

1037

997

1038

# Created - property

998

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

1039

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

999

1040

def Created_dbus_property(self):

1000

1041

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

1001

1042

1002

1043

# LastEnabled - property

1003

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

1044

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

1004

1045

def LastEnabled_dbus_property(self):

1005

1046

if self.last_enabled is None:

1006

return dbus.String(u"")

1047

return dbus.String("")

1007

1048

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

1008

1049

1009

1050

# Enabled - property

1010

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

1011

access=u"readwrite")

1051

@dbus_service_property(_interface, signature="b",

1052

access="readwrite")

1012

1053

def Enabled_dbus_property(self, value=None):

1013

1054

if value is None: # get

1014

1055

return dbus.Boolean(self.enabled)

1018

1059

self.disable()

1019

1060

1020

1061

# LastCheckedOK - property

1021

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

1022

access=u"readwrite")

1062

@dbus_service_property(_interface, signature="s",

1063

access="readwrite")

1023

1064

def LastCheckedOK_dbus_property(self, value=None):

1024

1065

if value is not None:

1025

1066

self.checked_ok()

1026

1067

return

1027

1068

if self.last_checked_ok is None:

1028

return dbus.String(u"")

1069

return dbus.String("")

1029

1070

return dbus.String(self._datetime_to_dbus(self

1030

1071

.last_checked_ok))

1031

1072

1073

# LastApprovalRequest - property

1074

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

1075

def LastApprovalRequest_dbus_property(self):

1076

if self.last_approval_request is None:

1077

return dbus.String("")

1078

return dbus.String(self.

1079

_datetime_to_dbus(self

1080

.last_approval_request))

1081

1032

1082

# Timeout - property

1033

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

1034

access=u"readwrite")

1083

@dbus_service_property(_interface, signature="t",

1084

access="readwrite")

1035

1085

def Timeout_dbus_property(self, value=None):

1036

1086

if value is None: # get

1037

1087

return dbus.UInt64(self.timeout_milliseconds())

1038

1088

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

1039

1089

# Emit D-Bus signal

1040

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

1090

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

1041

1091

dbus.UInt64(value, variant_level=1))

1042

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

1092

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

1043

1093

return

1044

1094

# Reschedule timeout

1045

1095

gobject.source_remove(self.disable_initiator_tag)

1058

1108

(time_to_die, self.disable))

1059

1109

1060

1110

# Interval - property

1061

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

1062

access=u"readwrite")

1111

@dbus_service_property(_interface, signature="t",

1112

access="readwrite")

1063

1113

def Interval_dbus_property(self, value=None):

1064

1114

if value is None: # get

1065

1115

return dbus.UInt64(self.interval_milliseconds())

1066

1116

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

1067

1117

# Emit D-Bus signal

1068

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

1118

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

1069

1119

dbus.UInt64(value, variant_level=1))

1070

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

1120

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

1071

1121

return

1072

1122

# Reschedule checker run

1073

1123

gobject.source_remove(self.checker_initiator_tag)

1076

1126

self.start_checker() # Start one now, too

1077

1127

1078

1128

# Checker - property

1079

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

1080

access=u"readwrite")

1129

@dbus_service_property(_interface, signature="s",

1130

access="readwrite")

1081

1131

def Checker_dbus_property(self, value=None):

1082

1132

if value is None: # get

1083

1133

return dbus.String(self.checker_command)

1084

1134

self.checker_command = value

1085

1135

# Emit D-Bus signal

1086

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

1136

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

1087

1137

dbus.String(self.checker_command,

1088

1138

variant_level=1))

1089

1139

1090

1140

# CheckerRunning - property

1091

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

1092

access=u"readwrite")

1141

@dbus_service_property(_interface, signature="b",

1142

access="readwrite")

1093

1143

def CheckerRunning_dbus_property(self, value=None):

1094

1144

if value is None: # get

1095

1145

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

1099

1149

self.stop_checker()

1100

1150

1101

1151

# ObjectPath - property

1102

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

1152

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

1103

1153

def ObjectPath_dbus_property(self):

1104

1154

return self.dbus_object_path # is already a dbus.ObjectPath

1105

1155

1106

1156

# Secret = property

1107

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

1108

access=u"write", byte_arrays=True)

1157

@dbus_service_property(_interface, signature="ay",

1158

access="write", byte_arrays=True)

1109

1159

def Secret_dbus_property(self, value):

1110

1160

self.secret = str(value)

1111

1161

1146

1196

1147

1197

def handle(self):

1148

1198

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

1149

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

1199

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

1150

1200

unicode(self.client_address))

1151

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

1201

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

1152

1202

self.server.child_pipe.fileno())

1153

1203

1154

1204

session = (gnutls.connection

1161

1211

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

1162

1212

# here despite using OpenPGP certificates.

1163

1213

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"))

1214

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

1215

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

1216

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

1217

# "+DHE-DSS"))

1168

1218

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

1169

1219

priority = self.server.gnutls_priority

1170

1220

if priority is None:

1171

priority = u"NORMAL"

1221

priority = "NORMAL"

1172

1222

(gnutls.library.functions

1173

1223

.gnutls_priority_set_direct(session._c_object,

1174

1224

priority, None))

1176

1226

# Start communication using the Mandos protocol

1177

1227

# Get protocol number

1178

1228

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

1179

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

1229

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

1180

1230

try:

1181

1231

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

1182

1232

raise RuntimeError

1183

except (ValueError, IndexError, RuntimeError), error:

1184

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

1233

except (ValueError, IndexError, RuntimeError) as error:

1234

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

1185

1235

return

1186

1236

1187

1237

# Start GnuTLS connection

1188

1238

try:

1189

1239

session.handshake()

1190

except gnutls.errors.GNUTLSError, error:

1191

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

1240

except gnutls.errors.GNUTLSError as error:

1241

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

1192

1242

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

1193

1243

# established. Just abandon the request.

1194

1244

return

1195

logger.debug(u"Handshake succeeded")

1245

logger.debug("Handshake succeeded")

1196

1246

1197

1247

approval_required = False

1198

1248

try:

1199

1249

try:

1200

1250

fpr = self.fingerprint(self.peer_certificate

1201

1251

(session))

1202

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

1203

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

1252

except (TypeError,

1253

gnutls.errors.GNUTLSError) as error:

1254

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

1204

1255

return

1205

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

1256

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

1206

1257

1207

1258

try:

1208

1259

client = ProxyClient(child_pipe, fpr,

1217

1268

1218

1269

while True:

1219

1270

if not client.enabled:

1220

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

1271

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

1221

1272

client.name)

1222

1273

if self.server.use_dbus:

1223

1274

# Emit D-Bus signal

1228

1279

#We are approved or approval is disabled

1229

1280

break

1230

1281

elif client._approved is None:

1231

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

1282

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

1232

1283

client.name)

1233

1284

if self.server.use_dbus:

1234

1285

# Emit D-Bus signal

1236

1287

client.approval_delay_milliseconds(),

1237

1288

client.approved_by_default)

1238

1289

else:

1239

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

1290

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

1240

1291

client.name)

1241

1292

if self.server.use_dbus:

1242

1293

# Emit D-Bus signal

1268

1319

while sent_size < len(client.secret):

1269

1320

try:

1270

1321

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

1271

except (gnutls.errors.GNUTLSError), error:

1322

except gnutls.errors.GNUTLSError as error:

1272

1323

logger.warning("gnutls send failed")

1273

1324

return

1274

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

1325

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

1275

1326

sent, len(client.secret)

1276

1327

- (sent_size + sent))

1277

1328

sent_size += sent

1278

1329

1279

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

1330

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

1280

1331

# bump the timeout as if seen

1281

1332

client.checked_ok()

1282

1333

if self.server.use_dbus:

1288

1339

client.approvals_pending -= 1

1289

1340

try:

1290

1341

session.bye()

1291

except (gnutls.errors.GNUTLSError), error:

1342

except gnutls.errors.GNUTLSError as error:

1292

1343

logger.warning("GnuTLS bye failed")

1293

1344

1294

1345

@staticmethod

1305

1356

.gnutls_certificate_get_peers

1306

1357

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

1307

1358

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

1308

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

1309

u" certificate")

1359

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

1360

" certificate")

1310

1361

if list_size.value == 0:

1311

1362

return None

1312

1363

cert = cert_list[0]

1338

1389

if crtverify.value != 0:

1339

1390

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1340

1391

raise (gnutls.errors.CertificateSecurityError

1341

(u"Verify failed"))

1392

("Verify failed"))

1342

1393

# New buffer for the fingerprint

1343

1394

buf = ctypes.create_string_buffer(20)

1344

1395

buf_len = ctypes.c_size_t()

1351

1402

# Convert the buffer to a Python bytestring

1352

1403

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

1353

1404

# Convert the bytestring to hexadecimal notation

1354

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

1405

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

1355

1406

return hex_fpr

1356

1407

1357

1408

1385

1436

1386

1437

def add_pipe(self, parent_pipe):

1387

1438

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

1388

pass

1439

raise NotImplementedError

1389

1440

1390

1441

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1391

1442

socketserver.TCPServer, object):

1409

1460

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

1410

1461

if self.interface is not None:

1411

1462

if SO_BINDTODEVICE is None:

1412

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

1413

u" cannot bind to interface %s",

1463

logger.error("SO_BINDTODEVICE does not exist;"

1464

" cannot bind to interface %s",

1414

1465

self.interface)

1415

1466

else:

1416

1467

try:

1417

1468

self.socket.setsockopt(socket.SOL_SOCKET,

1418

1469

SO_BINDTODEVICE,

1419

1470

str(self.interface

1420

+ u'\0'))

1421

except socket.error, error:

1471

+ '\0'))

1472

except socket.error as error:

1422

1473

if error[0] == errno.EPERM:

1423

logger.error(u"No permission to"

1424

u" bind to interface %s",

1474

logger.error("No permission to"

1475

" bind to interface %s",

1425

1476

self.interface)

1426

1477

elif error[0] == errno.ENOPROTOOPT:

1427

logger.error(u"SO_BINDTODEVICE not available;"

1428

u" cannot bind to interface %s",

1478

logger.error("SO_BINDTODEVICE not available;"

1479

" cannot bind to interface %s",

1429

1480

self.interface)

1430

1481

else:

1431

1482

raise

1433

1484

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

1434

1485

if not self.server_address[0]:

1435

1486

if self.address_family == socket.AF_INET6:

1436

any_address = u"::" # in6addr_any

1487

any_address = "::" # in6addr_any

1437

1488

else:

1438

1489

any_address = socket.INADDR_ANY

1439

1490

self.server_address = (any_address,

1488

1539

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

1489

1540

client_object=None):

1490

1541

condition_names = {

1491

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

1492

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

1542

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

1543

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

1493

1544

# blocking).

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

1545

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

1546

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

1547

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

1497

1548

# broken, usually for pipes and

1498

1549

# sockets).

1499

1550

}

1518

1569

client = c

1519

1570

break

1520

1571

else:

1521

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

1522

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

1572

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

1573

"dress: %s", fpr, address)

1523

1574

if self.use_dbus:

1524

1575

# Emit D-Bus signal

1525

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

1559

1610

def string_to_delta(interval):

1560

1611

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

1561

1612

1562

>>> string_to_delta(u'7d')

1613

>>> string_to_delta('7d')

1563

1614

datetime.timedelta(7)

1564

>>> string_to_delta(u'60s')

1615

>>> string_to_delta('60s')

1565

1616

datetime.timedelta(0, 60)

1566

>>> string_to_delta(u'60m')

1617

>>> string_to_delta('60m')

1567

1618

datetime.timedelta(0, 3600)

1568

>>> string_to_delta(u'24h')

1619

>>> string_to_delta('24h')

1569

1620

datetime.timedelta(1)

1570

>>> string_to_delta(u'1w')

1621

>>> string_to_delta('1w')

1571

1622

datetime.timedelta(7)

1572

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

1623

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

1573

1624

datetime.timedelta(0, 330)

1574

1625

"""

1575

1626

timevalue = datetime.timedelta(0)

1577

1628

try:

1578

1629

suffix = unicode(s[-1])

1579

1630

value = int(s[:-1])

1580

if suffix == u"d":

1631

if suffix == "d":

1581

1632

delta = datetime.timedelta(value)

1582

elif suffix == u"s":

1633

elif suffix == "s":

1583

1634

delta = datetime.timedelta(0, value)

1584

elif suffix == u"m":

1635

elif suffix == "m":

1585

1636

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

1586

elif suffix == u"h":

1637

elif suffix == "h":

1587

1638

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

1588

elif suffix == u"w":

1639

elif suffix == "w":

1589

1640

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

1590

1641

else:

1591

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

1592

except (ValueError, IndexError), e:

1593

raise ValueError(e.message)

1642

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

1643

except (ValueError, IndexError) as e:

1644

raise ValueError(*(e.args))

1594

1645

timevalue += delta

1595

1646

return timevalue

1596

1647

1602

1653

global if_nametoindex

1603

1654

try:

1604

1655

if_nametoindex = (ctypes.cdll.LoadLibrary

1605

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

1656

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

1606

1657

.if_nametoindex)

1607

1658

except (OSError, AttributeError):

1608

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

1659

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

1609

1660

def if_nametoindex(interface):

1610

1661

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

1611

1662

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

1612

1663

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

1613

1664

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1614

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

1665

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

1615

1666

interface))

1616

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

1667

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

1617

1668

ifreq[16:20])[0]

1618

1669

return interface_index

1619

1670

return if_nametoindex(interface)

1627

1678

sys.exit()

1628

1679

os.setsid()

1629

1680

if not nochdir:

1630

os.chdir(u"/")

1681

os.chdir("/")

1631

1682

if os.fork():

1632

1683

sys.exit()

1633

1684

if not noclose:

1635

1686

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

1636

1687

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

1637

1688

raise OSError(errno.ENODEV,

1638

u"%s not a character device"

1689

"%s not a character device"

1639

1690

% os.path.devnull)

1640

1691

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

1641

1692

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

1649

1700

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

1650

1701

# Parsing of options, both command line and config file

1651

1702

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]

1703

parser = argparse.ArgumentParser()

1704

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

1705

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

1706

help="show version number and exit")

1707

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

1708

help="Bind to interface IF")

1709

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

1710

help="Address to listen for requests on")

1711

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

1712

help="Port number to receive requests on")

1713

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

1714

help="Run self-test")

1715

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

1716

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

1717

" to terminal")

1718

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

1719

help="Debug level for stdout output")

1720

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

1721

" priority string (see GnuTLS documentation)")

1722

parser.add_argument("--servicename",

1723

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

1724

parser.add_argument("--configdir",

1725

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

1726

help="Directory to search for configuration"

1727

" files")

1728

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

1729

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

1730

" system bus interface")

1731

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

1732

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

1733

options = parser.parse_args()

1680

1734

1681

1735

if options.check:

1682

1736

import doctest

1684

1738

sys.exit()

1685

1739

1686

1740

# Default values for config file for server-global settings

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"",

1741

server_defaults = { "interface": "",

1742

"address": "",

1743

"port": "",

1744

"debug": "False",

1745

"priority":

1746

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

1747

"servicename": "Mandos",

1748

"use_dbus": "True",

1749

"use_ipv6": "True",

1750

"debuglevel": "",

1697

1751

}

1698

1752

1699

1753

# Parse config file for server-global settings

1700

1754

server_config = configparser.SafeConfigParser(server_defaults)

1701

1755

del server_defaults

1702

1756

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

1703

u"mandos.conf"))

1757

"mandos.conf"))

1704

1758

# Convert the SafeConfigParser object to a dict

1705

1759

server_settings = server_config.defaults()

1706

1760

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

1707

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

1708

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

1761

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

1762

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

1709

1763

option)

1710

1764

if server_settings["port"]:

1711

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

1712

u"port")

1765

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

1766

"port")

1713

1767

del server_config

1714

1768

1715

1769

# Override the settings from the config file with command line

1716

1770

# options, if set.

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"):

1771

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

1772

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

1773

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

1720

1774

value = getattr(options, option)

1721

1775

if value is not None:

1722

1776

server_settings[option] = value

1730

1784

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

1731

1785

1732

1786

# For convenience

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"]

1787

debug = server_settings["debug"]

1788

debuglevel = server_settings["debuglevel"]

1789

use_dbus = server_settings["use_dbus"]

1790

use_ipv6 = server_settings["use_ipv6"]

1737

1791

1738

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

1792

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

1739

1793

syslogger.setFormatter(logging.Formatter

1740

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

1741

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

1742

% server_settings[u"servicename"]))

1794

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

1795

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

1796

% server_settings["servicename"]))

1743

1797

1744

1798

# Parse config file with clients

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",

1799

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

1800

"interval": "5m",

1801

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

1802

"host": "",

1803

"approval_delay": "0s",

1804

"approval_duration": "1s",

1751

1805

}

1752

1806

client_config = configparser.SafeConfigParser(client_defaults)

1753

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

1754

u"clients.conf"))

1807

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

1808

"clients.conf"))

1755

1809

1756

1810

global mandos_dbus_service

1757

1811

mandos_dbus_service = None

1758

1812

1759

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

1760

server_settings[u"port"]),

1813

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

1814

server_settings["port"]),

1761

1815

ClientHandler,

1762

interface=(server_settings[u"interface"]

1816

interface=(server_settings["interface"]

1763

1817

or None),

1764

1818

use_ipv6=use_ipv6,

1765

1819

gnutls_priority=

1766

server_settings[u"priority"],

1820

server_settings["priority"],

1767

1821

use_dbus=use_dbus)

1768

1822

if not debug:

1769

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

1823

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

1770

1824

try:

1771

pidfile = open(pidfilename, u"w")

1825

pidfile = open(pidfilename, "w")

1772

1826

except IOError:

1773

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

1827

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

1774

1828

1775

1829

try:

1776

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

1777

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

1830

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

1831

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

1778

1832

except KeyError:

1779

1833

try:

1780

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

1781

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

1834

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

1835

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

1782

1836

except KeyError:

1783

1837

try:

1784

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

1785

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

1838

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

1839

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

1786

1840

except KeyError:

1787

1841

uid = 65534

1788

1842

gid = 65534

1789

1843

try:

1790

1844

os.setgid(gid)

1791

1845

os.setuid(uid)

1792

except OSError, error:

1846

except OSError as error:

1793

1847

if error[0] != errno.EPERM:

1794

1848

raise error

1795

1849

1810

1864

1811

1865

@gnutls.library.types.gnutls_log_func

1812

1866

def debug_gnutls(level, string):

1813

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

1867

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

1814

1868

1815

1869

(gnutls.library.functions

1816

1870

.gnutls_global_set_log_function(debug_gnutls))

1824

1878

# No console logging

1825

1879

logger.removeHandler(console)

1826

1880

1881

# Need to fork before connecting to D-Bus

1882

if not debug:

1883

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

1884

daemon()

1827

1885

1828

1886

global main_loop

1829

1887

# From the Avahi example code

1833

1891

# End of Avahi example code

1834

1892

if use_dbus:

1835

1893

try:

1836

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

1894

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

1837

1895

bus, do_not_queue=True)

1838

except dbus.exceptions.NameExistsException, e:

1839

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

1896

except dbus.exceptions.NameExistsException as e:

1897

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

1840

1898

use_dbus = False

1841

server_settings[u"use_dbus"] = False

1899

server_settings["use_dbus"] = False

1842

1900

tcp_server.use_dbus = False

1843

1901

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1844

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

1845

servicetype = u"_mandos._tcp",

1902

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

1903

servicetype = "_mandos._tcp",

1846

1904

protocol = protocol, bus = bus)

1847

1905

if server_settings["interface"]:

1848

1906

service.interface = (if_nametoindex

1849

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

1850

1851

if not debug:

1852

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

1853

daemon()

1854

1907

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

1908

1855

1909

global multiprocessing_manager

1856

1910

multiprocessing_manager = multiprocessing.Manager()

1857

1911

1876

1930

client_config, section)))

1877

1931

for section in client_config.sections()))

1878

1932

if not tcp_server.clients:

1879

logger.warning(u"No clients defined")

1933

logger.warning("No clients defined")

1880

1934

1881

1935

if not debug:

1882

1936

try:

1883

1937

with pidfile:

1884

1938

pid = os.getpid()

1885

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

1939

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

1886

1940

del pidfile

1887

1941

except IOError:

1888

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

1942

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

1889

1943

pidfilename, pid)

1890

1944

except NameError:

1891

1945

# "pidfile" was never created

1901

1955

class MandosDBusService(dbus.service.Object):

1902

1956

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

1903

1957

def __init__(self):

1904

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

1905

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

1958

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

1959

_interface = "se.bsnet.fukt.Mandos"

1906

1960

1907

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

1961

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

1908

1962

def ClientAdded(self, objpath):

1909

1963

"D-Bus signal"

1910

1964

pass

1911

1965

1912

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

1966

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

1913

1967

def ClientNotFound(self, fingerprint, address):

1914

1968

"D-Bus signal"

1915

1969

pass

1916

1970

1917

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

1971

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

1918

1972

def ClientRemoved(self, objpath, name):

1919

1973

"D-Bus signal"

1920

1974

pass

1921

1975

1922

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

1976

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

1923

1977

def GetAllClients(self):

1924

1978

"D-Bus method"

1925

1979

return dbus.Array(c.dbus_object_path

1926

1980

for c in tcp_server.clients)

1927

1981

1928

1982

@dbus.service.method(_interface,

1929

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

1983

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

1930

1984

def GetAllClientsWithProperties(self):

1931

1985

"D-Bus method"

1932

1986

return dbus.Dictionary(

1933

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

1987

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

1934

1988

for c in tcp_server.clients),

1935

signature=u"oa{sv}")

1989

signature="oa{sv}")

1936

1990

1937

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

1991

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

1938

1992

def RemoveClient(self, object_path):

1939

1993

"D-Bus method"

1940

1994

for c in tcp_server.clients:

1982

2036

# Find out what port we got

1983

2037

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

1984

2038

if use_ipv6:

1985

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

2039

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

1986

2040

" flowinfo %d, scope_id %d"

1987

2041

% tcp_server.socket.getsockname())

1988

2042

else: # IPv4

1989

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

2043

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

1990

2044

% tcp_server.socket.getsockname())

1991

2045

1992

2046

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

1995

2049

# From the Avahi example code

1996

2050

try:

1997

2051

service.activate()

1998

except dbus.exceptions.DBusException, error:

1999

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

2052

except dbus.exceptions.DBusException as error:

2053

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

2000

2054

cleanup()

2001

2055

sys.exit(1)

2002

2056

# End of Avahi example code

2006

2060

(tcp_server.handle_request

2007

2061

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

2008

2062

2009

logger.debug(u"Starting main loop")

2063

logger.debug("Starting main loop")

2010

2064

main_loop.run()

2011

except AvahiError, error:

2012

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

2065

except AvahiError as error:

2066

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

2013

2067

cleanup()

2014

2068

sys.exit(1)

2015

2069

except KeyboardInterrupt:

2016

2070

if debug:

2017

print >> sys.stderr

2018

logger.debug(u"Server received KeyboardInterrupt")

2019

logger.debug(u"Server exiting")

2071

print("", file=sys.stderr)

2072

logger.debug("Server received KeyboardInterrupt")

2073

logger.debug("Server exiting")

2020

2074

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

2021

2075

cleanup()

2022

2076