/mandos/trunk : revision 423

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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 = "1.3.0"

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

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Attributes:

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_approved: bool(); 'None' if not yet approved/disapproved

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approval_delay: datetime.timedelta(); Time to wait for approval

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approval_duration: datetime.timedelta(); Duration of one approval

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D-Bus identifiers

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

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uniquely identify the client

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

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host: string; available for use by the checker command

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created: datetime.datetime(); (UTC) object creation

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last_enabled: datetime.datetime(); (UTC)

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enabled: bool()

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

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

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until this client is disabled

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

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

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

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to see if the client lives.

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'None' if no process is running.

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checker_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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checker_initiator_tag: a gobject event source tag, or None

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disable_initiator_tag: - '' -

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checker_callback_tag: - '' -

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

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client lives. %() expansions are done at

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

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

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checker_initiator_tag: a gobject event source tag, or None

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created: datetime.datetime(); (UTC) object creation

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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uniquely identify the client

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host: string; available for use by the checker command

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

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

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

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last_enabled: datetime.datetime(); (UTC)

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D-Bus identifiers

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

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

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until this client is disabled

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runtime_expansions: Allowed attributes for runtime expansion.

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approval_delay: datetime.timedelta(); Time to wait for approval

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_approved: bool(); 'None' if not yet approved/disapproved

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approval_duration: datetime.timedelta(); Duration of one approval

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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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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to 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.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.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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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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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):

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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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command = self.checker_command % self.host

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except TypeError:

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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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errors=

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'replace')))

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for attr in

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self.runtime_expansions)

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escaped_attrs = dict((key,

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re.escape(unicode(str(val),

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errors=

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u'replace')))

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for key, val in

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vars(self).iteritems())

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try:

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command = self.checker_command % escaped_attrs

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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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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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464

return True # Try again later

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self.current_checker_command = command

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466

try:

508

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

467

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

509

468

command, self.name)

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

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470

# 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,

516

shell=True, cwd="/")

475

shell=True, cwd=u"/")

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self.checker_callback_tag = (gobject.child_watch_add

518

477

(self.checker.pid,

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self.checker_callback,

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483

if pid:

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gobject.source_remove(self.checker_callback_tag)

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485

self.checker_callback(pid, status, command)

527

except OSError as error:

528

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

486

except OSError, error:

487

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

538

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

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

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return

540

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

499

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

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try:

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501

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)

546

except OSError as error:

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except OSError, error:

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506

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

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raise

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self.checker = None

550

509

551

def dbus_service_property(dbus_interface, signature="v",

552

access="readwrite", byte_arrays=False):

510

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

511

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

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512

"""Decorators for marking methods of a DBusObjectWithProperties to

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become properties on the D-Bus.

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514

562

521

"""

563

522

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

564

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

565

if byte_arrays and signature != "ay":

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

567

" signature %r" % signature)

524

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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527

def decorator(func):

569

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func._dbus_is_property = True

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func._dbus_interface = dbus_interface

571

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func._dbus_signature = signature

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531

func._dbus_access = access

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532

func._dbus_name = func.__name__

574

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

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

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534

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

576

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

535

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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607

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567

@staticmethod

609

568

def _is_dbus_property(obj):

610

return getattr(obj, "_dbus_is_property", False)

569

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

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570

612

571

def _get_all_dbus_properties(self):

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572

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

621

580

property with the specified name and interface.

622

581

"""

623

582

for name in (property_name,

624

property_name + "_dbus_property"):

583

property_name + u"_dbus_property"):

625

584

prop = getattr(self, name, None)

626

585

if (prop is None

627

586

or not self._is_dbus_property(prop)

631

590

continue

632

591

return prop

633

592

# No such property

634

raise DBusPropertyNotFound(self.dbus_object_path + ":"

635

+ interface_name + "."

593

raise DBusPropertyNotFound(self.dbus_object_path + u":"

594

+ interface_name + u"."

636

595

+ property_name)

637

596

638

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

639

out_signature="v")

597

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

598

out_signature=u"v")

640

599

def Get(self, interface_name, property_name):

641

600

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

642

601

"""

643

602

prop = self._get_dbus_property(interface_name, property_name)

644

if prop._dbus_access == "write":

603

if prop._dbus_access == u"write":

645

604

raise DBusPropertyAccessException(property_name)

646

605

value = prop()

647

if not hasattr(value, "variant_level"):

606

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

648

607

return value

649

608

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

650

609

651

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

610

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

652

611

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

653

612

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

654

613

"""

655

614

prop = self._get_dbus_property(interface_name, property_name)

656

if prop._dbus_access == "read":

615

if prop._dbus_access == u"read":

657

616

raise DBusPropertyAccessException(property_name)

658

if prop._dbus_get_args_options["byte_arrays"]:

617

if prop._dbus_get_args_options[u"byte_arrays"]:

659

618

# The byte_arrays option is not supported yet on

660

619

# signatures other than "ay".

661

if prop._dbus_signature != "ay":

620

if prop._dbus_signature != u"ay":

662

621

raise ValueError

663

622

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

664

623

for byte in value))

665

624

prop(value)

666

625

667

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

668

out_signature="a{sv}")

626

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

627

out_signature=u"a{sv}")

669

628

def GetAll(self, interface_name):

670

629

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

671

630

standard.

679

638

# Interface non-empty but did not match

680

639

continue

681

640

# Ignore write-only properties

682

if prop._dbus_access == "write":

641

if prop._dbus_access == u"write":

683

642

continue

684

643

value = prop()

685

if not hasattr(value, "variant_level"):

644

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

686

645

all[name] = value

687

646

continue

688

647

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

689

648

value.variant_level+1)

690

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

649

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

691

650

692

651

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

693

out_signature="s",

652

out_signature=u"s",

694

653

path_keyword='object_path',

695

654

connection_keyword='connection')

696

655

def Introspect(self, object_path, connection):

701

660

try:

702

661

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

703

662

def make_tag(document, name, prop):

704

e = document.createElement("property")

705

e.setAttribute("name", name)

706

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

707

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

663

e = document.createElement(u"property")

664

e.setAttribute(u"name", name)

665

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

666

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

708

667

return e

709

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

668

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

710

669

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

711

670

for name, prop

712

671

in self._get_all_dbus_properties()

713

672

if prop._dbus_interface

714

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

673

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

715

674

if_tag.appendChild(tag)

716

675

# Add the names to the return values for the

717

676

# "org.freedesktop.DBus.Properties" methods

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")

677

if (if_tag.getAttribute(u"name")

678

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

679

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

680

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

681

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

682

if (arg.getAttribute(u"direction")

683

== u"out"):

684

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

685

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

686

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

687

if (arg.getAttribute(u"direction")

688

== u"out"):

689

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

690

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

732

691

document.unlink()

733

692

except (AttributeError, xml.dom.DOMException,

734

xml.parsers.expat.ExpatError) as error:

735

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

693

xml.parsers.expat.ExpatError), error:

694

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

736

695

error)

737

696

return xmlstring

738

697

744

703

dbus_object_path: dbus.ObjectPath

745

704

bus: dbus.SystemBus()

746

705

"""

747

748

runtime_expansions = (Client.runtime_expansions

749

+ ("dbus_object_path",))

750

751

706

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

752

707

753

708

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

756

711

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

757

712

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

758

713

# the D-Bus

759

client_object_name = unicode(self.name).translate(

760

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

761

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

762

714

self.dbus_object_path = (dbus.ObjectPath

763

("/clients/" + client_object_name))

715

(u"/clients/"

716

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

764

717

DBusObjectWithProperties.__init__(self, self.bus,

765

718

self.dbus_object_path)

766

719

773

726

if (hasattr(self, "dbus_object_path")

774

727

and bval is not bool(old_value)):

775

728

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

776

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

729

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

777

730

dbus_bool)

778

731

779

732

approvals_pending = property(_get_approvals_pending,

787

740

variant_level=variant_level)

788

741

789

742

def enable(self):

790

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

743

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

791

744

r = Client.enable(self)

792

745

if oldstate != self.enabled:

793

746

# Emit D-Bus signals

794

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

747

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

795

748

dbus.Boolean(True, variant_level=1))

796

749

self.PropertyChanged(

797

dbus.String("LastEnabled"),

750

dbus.String(u"LastEnabled"),

798

751

self._datetime_to_dbus(self.last_enabled,

799

752

variant_level=1))

800

753

return r

801

754

802

755

def disable(self, quiet = False):

803

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

756

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

804

757

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

805

758

if not quiet and oldstate != self.enabled:

806

759

# Emit D-Bus signal

807

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

760

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

808

761

dbus.Boolean(False, variant_level=1))

809

762

return r

810

763

813

766

self.remove_from_connection()

814

767

except LookupError:

815

768

pass

816

if hasattr(DBusObjectWithProperties, "__del__"):

769

if hasattr(DBusObjectWithProperties, u"__del__"):

817

770

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

818

771

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

819

772

822

775

self.checker_callback_tag = None

823

776

self.checker = None

824

777

# Emit D-Bus signal

825

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

778

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

826

779

dbus.Boolean(False, variant_level=1))

827

780

if os.WIFEXITED(condition):

828

781

exitstatus = os.WEXITSTATUS(condition)

840

793

*args, **kwargs)

841

794

842

795

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

843

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

796

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

844

797

# Emit D-Bus signal

845

798

self.PropertyChanged(

846

dbus.String("LastCheckedOK"),

799

dbus.String(u"LastCheckedOK"),

847

800

(self._datetime_to_dbus(self.last_checked_ok,

848

801

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)))

857

802

return r

858

803

859

804

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

869

814

# Emit D-Bus signal

870

815

self.CheckerStarted(self.current_checker_command)

871

816

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

817

dbus.String(u"CheckerRunning"),

873

818

dbus.Boolean(True, variant_level=1))

874

819

return r

875

820

876

821

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

877

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

822

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

878

823

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

879

824

if (old_checker is not None

880

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

881

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

825

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

826

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

882

827

dbus.Boolean(False, variant_level=1))

883

828

return r

884

829

895

840

896

841

897

842

## D-Bus methods, signals & properties

898

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

843

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

899

844

900

845

## Signals

901

846

902

847

# CheckerCompleted - signal

903

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

848

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

904

849

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

905

850

"D-Bus signal"

906

851

pass

907

852

908

853

# CheckerStarted - signal

909

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

854

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

910

855

def CheckerStarted(self, command):

911

856

"D-Bus signal"

912

857

pass

913

858

914

859

# PropertyChanged - signal

915

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

860

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

916

861

def PropertyChanged(self, property, value):

917

862

"D-Bus signal"

918

863

pass

927

872

pass

928

873

929

874

# Rejected - signal

930

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

875

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

931

876

def Rejected(self, reason):

932

877

"D-Bus signal"

933

878

pass

934

879

935

880

# NeedApproval - signal

936

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

881

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

937

882

def NeedApproval(self, timeout, default):

938

883

"D-Bus signal"

939

return self.need_approval()

884

pass

940

885

941

886

## Methods

942

887

943

888

# Approve - method

944

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

889

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

945

890

def Approve(self, value):

946

891

self.approve(value)

947

892

948

893

# CheckedOK - method

949

894

@dbus.service.method(_interface)

950

895

def CheckedOK(self):

951

self.checked_ok()

896

return self.checked_ok()

952

897

953

898

# Enable - method

954

899

@dbus.service.method(_interface)

976

921

## Properties

977

922

978

923

# ApprovalPending - property

979

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

924

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

980

925

def ApprovalPending_dbus_property(self):

981

926

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

982

927

983

928

# ApprovedByDefault - property

984

@dbus_service_property(_interface, signature="b",

985

access="readwrite")

929

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

930

access=u"readwrite")

986

931

def ApprovedByDefault_dbus_property(self, value=None):

987

932

if value is None: # get

988

933

return dbus.Boolean(self.approved_by_default)

989

934

self.approved_by_default = bool(value)

990

935

# Emit D-Bus signal

991

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

936

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

992

937

dbus.Boolean(value, variant_level=1))

993

938

994

939

# ApprovalDelay - property

995

@dbus_service_property(_interface, signature="t",

996

access="readwrite")

940

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

941

access=u"readwrite")

997

942

def ApprovalDelay_dbus_property(self, value=None):

998

943

if value is None: # get

999

944

return dbus.UInt64(self.approval_delay_milliseconds())

1000

945

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

1001

946

# Emit D-Bus signal

1002

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

947

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

1003

948

dbus.UInt64(value, variant_level=1))

1004

949

1005

950

# ApprovalDuration - property

1006

@dbus_service_property(_interface, signature="t",

1007

access="readwrite")

951

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

952

access=u"readwrite")

1008

953

def ApprovalDuration_dbus_property(self, value=None):

1009

954

if value is None: # get

1010

955

return dbus.UInt64(self._timedelta_to_milliseconds(

1011

956

self.approval_duration))

1012

957

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

1013

958

# Emit D-Bus signal

1014

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

959

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

1015

960

dbus.UInt64(value, variant_level=1))

1016

961

1017

962

# Name - property

1018

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

963

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

1019

964

def Name_dbus_property(self):

1020

965

return dbus.String(self.name)

1021

966

1022

967

# Fingerprint - property

1023

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

968

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

1024

969

def Fingerprint_dbus_property(self):

1025

970

return dbus.String(self.fingerprint)

1026

971

1027

972

# Host - property

1028

@dbus_service_property(_interface, signature="s",

1029

access="readwrite")

973

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

974

access=u"readwrite")

1030

975

def Host_dbus_property(self, value=None):

1031

976

if value is None: # get

1032

977

return dbus.String(self.host)

1033

978

self.host = value

1034

979

# Emit D-Bus signal

1035

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

980

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

1036

981

dbus.String(value, variant_level=1))

1037

982

1038

983

# Created - property

1039

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

984

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

1040

985

def Created_dbus_property(self):

1041

986

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

1042

987

1043

988

# LastEnabled - property

1044

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

989

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

1045

990

def LastEnabled_dbus_property(self):

1046

991

if self.last_enabled is None:

1047

return dbus.String("")

992

return dbus.String(u"")

1048

993

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

1049

994

1050

995

# Enabled - property

1051

@dbus_service_property(_interface, signature="b",

1052

access="readwrite")

996

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

997

access=u"readwrite")

1053

998

def Enabled_dbus_property(self, value=None):

1054

999

if value is None: # get

1055

1000

return dbus.Boolean(self.enabled)

1059

1004

self.disable()

1060

1005

1061

1006

# LastCheckedOK - property

1062

@dbus_service_property(_interface, signature="s",

1063

access="readwrite")

1007

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

1008

access=u"readwrite")

1064

1009

def LastCheckedOK_dbus_property(self, value=None):

1065

1010

if value is not None:

1066

1011

self.checked_ok()

1067

1012

return

1068

1013

if self.last_checked_ok is None:

1069

return dbus.String("")

1014

return dbus.String(u"")

1070

1015

return dbus.String(self._datetime_to_dbus(self

1071

1016

.last_checked_ok))

1072

1017

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

1082

1018

# Timeout - property

1083

@dbus_service_property(_interface, signature="t",

1084

access="readwrite")

1019

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

1020

access=u"readwrite")

1085

1021

def Timeout_dbus_property(self, value=None):

1086

1022

if value is None: # get

1087

1023

return dbus.UInt64(self.timeout_milliseconds())

1088

1024

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

1089

1025

# Emit D-Bus signal

1090

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

1026

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

1091

1027

dbus.UInt64(value, variant_level=1))

1092

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

1028

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

1093

1029

return

1094

1030

# Reschedule timeout

1095

1031

gobject.source_remove(self.disable_initiator_tag)

1108

1044

(time_to_die, self.disable))

1109

1045

1110

1046

# Interval - property

1111

@dbus_service_property(_interface, signature="t",

1112

access="readwrite")

1047

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

1048

access=u"readwrite")

1113

1049

def Interval_dbus_property(self, value=None):

1114

1050

if value is None: # get

1115

1051

return dbus.UInt64(self.interval_milliseconds())

1116

1052

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

1117

1053

# Emit D-Bus signal

1118

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

1054

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

1119

1055

dbus.UInt64(value, variant_level=1))

1120

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

1056

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

1121

1057

return

1122

1058

# Reschedule checker run

1123

1059

gobject.source_remove(self.checker_initiator_tag)

1126

1062

self.start_checker() # Start one now, too

1127

1063

1128

1064

# Checker - property

1129

@dbus_service_property(_interface, signature="s",

1130

access="readwrite")

1065

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

1066

access=u"readwrite")

1131

1067

def Checker_dbus_property(self, value=None):

1132

1068

if value is None: # get

1133

1069

return dbus.String(self.checker_command)

1134

1070

self.checker_command = value

1135

1071

# Emit D-Bus signal

1136

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

1072

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

1137

1073

dbus.String(self.checker_command,

1138

1074

variant_level=1))

1139

1075

1140

1076

# CheckerRunning - property

1141

@dbus_service_property(_interface, signature="b",

1142

access="readwrite")

1077

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

1078

access=u"readwrite")

1143

1079

def CheckerRunning_dbus_property(self, value=None):

1144

1080

if value is None: # get

1145

1081

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

1149

1085

self.stop_checker()

1150

1086

1151

1087

# ObjectPath - property

1152

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

1088

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

1153

1089

def ObjectPath_dbus_property(self):

1154

1090

return self.dbus_object_path # is already a dbus.ObjectPath

1155

1091

1156

1092

# Secret = property

1157

@dbus_service_property(_interface, signature="ay",

1158

access="write", byte_arrays=True)

1093

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

1094

access=u"write", byte_arrays=True)

1159

1095

def Secret_dbus_property(self, value):

1160

1096

self.secret = str(value)

1161

1097

1196

1132

1197

1133

def handle(self):

1198

1134

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

1199

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

1135

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

1200

1136

unicode(self.client_address))

1201

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

1137

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

1202

1138

self.server.child_pipe.fileno())

1203

1139

1204

1140

session = (gnutls.connection

1211

1147

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

1212

1148

# here despite using OpenPGP certificates.

1213

1149

1214

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

1215

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

1216

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

1217

# "+DHE-DSS"))

1150

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

1151

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

1152

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

1153

# u"+DHE-DSS"))

1218

1154

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

1219

1155

priority = self.server.gnutls_priority

1220

1156

if priority is None:

1221

priority = "NORMAL"

1157

priority = u"NORMAL"

1222

1158

(gnutls.library.functions

1223

1159

.gnutls_priority_set_direct(session._c_object,

1224

1160

priority, None))

1226

1162

# Start communication using the Mandos protocol

1227

1163

# Get protocol number

1228

1164

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

1229

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

1165

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

1230

1166

try:

1231

1167

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

1232

1168

raise RuntimeError

1233

except (ValueError, IndexError, RuntimeError) as error:

1234

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

1169

except (ValueError, IndexError, RuntimeError), error:

1170

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

1235

1171

return

1236

1172

1237

1173

# Start GnuTLS connection

1238

1174

try:

1239

1175

session.handshake()

1240

except gnutls.errors.GNUTLSError as error:

1241

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

1176

except gnutls.errors.GNUTLSError, error:

1177

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

1242

1178

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

1243

1179

# established. Just abandon the request.

1244

1180

return

1245

logger.debug("Handshake succeeded")

1181

logger.debug(u"Handshake succeeded")

1246

1182

1247

1183

approval_required = False

1248

1184

try:

1249

1185

try:

1250

1186

fpr = self.fingerprint(self.peer_certificate

1251

1187

(session))

1252

except (TypeError,

1253

gnutls.errors.GNUTLSError) as error:

1254

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

1188

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

1189

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

1255

1190

return

1256

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

1191

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

1257

1192

1258

1193

try:

1259

1194

client = ProxyClient(child_pipe, fpr,

1268

1203

1269

1204

while True:

1270

1205

if not client.enabled:

1271

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

1206

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

1272

1207

client.name)

1273

1208

if self.server.use_dbus:

1274

1209

# Emit D-Bus signal

1279

1214

#We are approved or approval is disabled

1280

1215

break

1281

1216

elif client._approved is None:

1282

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

1217

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

1283

1218

client.name)

1284

1219

if self.server.use_dbus:

1285

1220

# Emit D-Bus signal

1287

1222

client.approval_delay_milliseconds(),

1288

1223

client.approved_by_default)

1289

1224

else:

1290

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

1225

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

1291

1226

client.name)

1292

1227

if self.server.use_dbus:

1293

1228

# Emit D-Bus signal

1308

1243

client.name)

1309

1244

if self.server.use_dbus:

1310

1245

# Emit D-Bus signal

1311

client.Rejected("Approval timed out")

1246

client.Rejected("Timed out")

1312

1247

return

1313

1248

else:

1314

1249

break

1319

1254

while sent_size < len(client.secret):

1320

1255

try:

1321

1256

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

1322

except gnutls.errors.GNUTLSError as error:

1257

except (gnutls.errors.GNUTLSError), error:

1323

1258

logger.warning("gnutls send failed")

1324

1259

return

1325

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

1260

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

1326

1261

sent, len(client.secret)

1327

1262

- (sent_size + sent))

1328

1263

sent_size += sent

1329

1264

1330

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

1265

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

1331

1266

# bump the timeout as if seen

1332

1267

client.checked_ok()

1333

1268

if self.server.use_dbus:

1339

1274

client.approvals_pending -= 1

1340

1275

try:

1341

1276

session.bye()

1342

except gnutls.errors.GNUTLSError as error:

1277

except (gnutls.errors.GNUTLSError), error:

1343

1278

logger.warning("GnuTLS bye failed")

1344

1279

1345

1280

@staticmethod

1356

1291

.gnutls_certificate_get_peers

1357

1292

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

1358

1293

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

1359

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

1360

" certificate")

1294

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

1295

u" certificate")

1361

1296

if list_size.value == 0:

1362

1297

return None

1363

1298

cert = cert_list[0]

1389

1324

if crtverify.value != 0:

1390

1325

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1391

1326

raise (gnutls.errors.CertificateSecurityError

1392

("Verify failed"))

1327

(u"Verify failed"))

1393

1328

# New buffer for the fingerprint

1394

1329

buf = ctypes.create_string_buffer(20)

1395

1330

buf_len = ctypes.c_size_t()

1402

1337

# Convert the buffer to a Python bytestring

1403

1338

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

1404

1339

# Convert the bytestring to hexadecimal notation

1405

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

1340

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

1406

1341

return hex_fpr

1407

1342

1408

1343

1436

1371

1437

1372

def add_pipe(self, parent_pipe):

1438

1373

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

1439

raise NotImplementedError

1374

pass

1440

1375

1441

1376

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1442

1377

socketserver.TCPServer, object):

1460

1395

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

1461

1396

if self.interface is not None:

1462

1397

if SO_BINDTODEVICE is None:

1463

logger.error("SO_BINDTODEVICE does not exist;"

1464

" cannot bind to interface %s",

1398

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

1399

u" cannot bind to interface %s",

1465

1400

self.interface)

1466

1401

else:

1467

1402

try:

1468

1403

self.socket.setsockopt(socket.SOL_SOCKET,

1469

1404

SO_BINDTODEVICE,

1470

1405

str(self.interface

1471

+ '\0'))

1472

except socket.error as error:

1406

+ u'\0'))

1407

except socket.error, error:

1473

1408

if error[0] == errno.EPERM:

1474

logger.error("No permission to"

1475

" bind to interface %s",

1409

logger.error(u"No permission to"

1410

u" bind to interface %s",

1476

1411

self.interface)

1477

1412

elif error[0] == errno.ENOPROTOOPT:

1478

logger.error("SO_BINDTODEVICE not available;"

1479

" cannot bind to interface %s",

1413

logger.error(u"SO_BINDTODEVICE not available;"

1414

u" cannot bind to interface %s",

1480

1415

self.interface)

1481

1416

else:

1482

1417

raise

1484

1419

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

1485

1420

if not self.server_address[0]:

1486

1421

if self.address_family == socket.AF_INET6:

1487

any_address = "::" # in6addr_any

1422

any_address = u"::" # in6addr_any

1488

1423

else:

1489

1424

any_address = socket.INADDR_ANY

1490

1425

self.server_address = (any_address,

1539

1474

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

1540

1475

client_object=None):

1541

1476

condition_names = {

1542

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

1543

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

1477

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

1478

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

1544

1479

# blocking).

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

1480

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

1481

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

1482

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

1548

1483

# broken, usually for pipes and

1549

1484

# sockets).

1550

1485

}

1552

1487

for cond, name in

1553

1488

condition_names.iteritems()

1554

1489

if cond & condition)

1490

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

1491

conditions_string)

1492

1555

1493

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

1556

1494

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

1557

1495

return False

1558

1496

1559

1497

# Read a request from the child

1560

1498

request = parent_pipe.recv()

1499

logger.debug(u"IPC request: %s", repr(request))

1561

1500

command = request[0]

1562

1501

1563

1502

if command == 'init':

1569

1508

client = c

1570

1509

break

1571

1510

else:

1572

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

1573

"dress: %s", fpr, address)

1511

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

1512

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

1574

1513

if self.use_dbus:

1575

1514

# Emit D-Bus signal

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

1515

mandos_dbus_service.ClientNotFound(fpr, address)

1577

1516

parent_pipe.send(False)

1578

1517

return False

1579

1518

1610

1549

def string_to_delta(interval):

1611

1550

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

1612

1551

1613

>>> string_to_delta('7d')

1552

>>> string_to_delta(u'7d')

1614

1553

datetime.timedelta(7)

1615

>>> string_to_delta('60s')

1554

>>> string_to_delta(u'60s')

1616

1555

datetime.timedelta(0, 60)

1617

>>> string_to_delta('60m')

1556

>>> string_to_delta(u'60m')

1618

1557

datetime.timedelta(0, 3600)

1619

>>> string_to_delta('24h')

1558

>>> string_to_delta(u'24h')

1620

1559

datetime.timedelta(1)

1621

>>> string_to_delta('1w')

1560

>>> string_to_delta(u'1w')

1622

1561

datetime.timedelta(7)

1623

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

1562

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

1624

1563

datetime.timedelta(0, 330)

1625

1564

"""

1626

1565

timevalue = datetime.timedelta(0)

1628

1567

try:

1629

1568

suffix = unicode(s[-1])

1630

1569

value = int(s[:-1])

1631

if suffix == "d":

1570

if suffix == u"d":

1632

1571

delta = datetime.timedelta(value)

1633

elif suffix == "s":

1572

elif suffix == u"s":

1634

1573

delta = datetime.timedelta(0, value)

1635

elif suffix == "m":

1574

elif suffix == u"m":

1636

1575

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

1637

elif suffix == "h":

1576

elif suffix == u"h":

1638

1577

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

1639

elif suffix == "w":

1578

elif suffix == u"w":

1640

1579

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

1641

1580

else:

1642

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

1643

except (ValueError, IndexError) as e:

1644

raise ValueError(*(e.args))

1581

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

1582

except (ValueError, IndexError), e:

1583

raise ValueError(e.message)

1645

1584

timevalue += delta

1646

1585

return timevalue

1647

1586

1653

1592

global if_nametoindex

1654

1593

try:

1655

1594

if_nametoindex = (ctypes.cdll.LoadLibrary

1656

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

1595

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

1657

1596

.if_nametoindex)

1658

1597

except (OSError, AttributeError):

1659

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

1598

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

1660

1599

def if_nametoindex(interface):

1661

1600

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

1662

1601

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

1663

1602

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

1664

1603

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1665

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

1604

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

1666

1605

interface))

1667

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

1606

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

1668

1607

ifreq[16:20])[0]

1669

1608

return interface_index

1670

1609

return if_nametoindex(interface)

1678

1617

sys.exit()

1679

1618

os.setsid()

1680

1619

if not nochdir:

1681

os.chdir("/")

1620

os.chdir(u"/")

1682

1621

if os.fork():

1683

1622

sys.exit()

1684

1623

if not noclose:

1686

1625

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

1687

1626

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

1688

1627

raise OSError(errno.ENODEV,

1689

"%s not a character device"

1628

u"%s not a character device"

1690

1629

% os.path.devnull)

1691

1630

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

1692

1631

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

1700

1639

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

1701

1640

# Parsing of options, both command line and config file

1702

1641

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()

1642

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

1643

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

1644

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

1645

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

1646

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

1647

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

1648

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

1649

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

1650

help=u"Run self-test")

1651

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

1652

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

1653

u" terminal")

1654

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

1655

help=u"Debug level for stdout output")

1656

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

1657

u" priority string (see GnuTLS documentation)")

1658

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

1659

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

1660

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

1661

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

1662

help=u"Directory to search for configuration"

1663

u" files")

1664

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

1665

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

1666

u" system bus interface")

1667

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

1668

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

1669

options = parser.parse_args()[0]

1734

1670

1735

1671

if options.check:

1736

1672

import doctest

1738

1674

sys.exit()

1739

1675

1740

1676

# Default values for config file for server-global settings

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": "",

1677

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

1678

u"address": u"",

1679

u"port": u"",

1680

u"debug": u"False",

1681

u"priority":

1682

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

1683

u"servicename": u"Mandos",

1684

u"use_dbus": u"True",

1685

u"use_ipv6": u"True",

1686

u"debuglevel": u"",

1751

1687

}

1752

1688

1753

1689

# Parse config file for server-global settings

1754

1690

server_config = configparser.SafeConfigParser(server_defaults)

1755

1691

del server_defaults

1756

1692

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

1757

"mandos.conf"))

1693

u"mandos.conf"))

1758

1694

# Convert the SafeConfigParser object to a dict

1759

1695

server_settings = server_config.defaults()

1760

1696

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

1761

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

1762

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

1697

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

1698

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

1763

1699

option)

1764

1700

if server_settings["port"]:

1765

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

1766

"port")

1701

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

1702

u"port")

1767

1703

del server_config

1768

1704

1769

1705

# Override the settings from the config file with command line

1770

1706

# options, if set.

1771

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

1772

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

1773

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

1707

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

1708

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

1709

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

1774

1710

value = getattr(options, option)

1775

1711

if value is not None:

1776

1712

server_settings[option] = value

1784

1720

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

1785

1721

1786

1722

# For convenience

1787

debug = server_settings["debug"]

1788

debuglevel = server_settings["debuglevel"]

1789

use_dbus = server_settings["use_dbus"]

1790

use_ipv6 = server_settings["use_ipv6"]

1723

debug = server_settings[u"debug"]

1724

debuglevel = server_settings[u"debuglevel"]

1725

use_dbus = server_settings[u"use_dbus"]

1726

use_ipv6 = server_settings[u"use_ipv6"]

1791

1727

1792

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

1728

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

1793

1729

syslogger.setFormatter(logging.Formatter

1794

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

1795

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

1796

% server_settings["servicename"]))

1730

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

1731

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

1732

% server_settings[u"servicename"]))

1797

1733

1798

1734

# Parse config file with clients

1799

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

1800

"interval": "5m",

1801

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

1802

"host": "",

1803

"approval_delay": "0s",

1804

"approval_duration": "1s",

1735

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

1736

u"interval": u"5m",

1737

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

1738

u"host": u"",

1739

u"approval_delay": u"0s",

1740

u"approval_duration": u"1s",

1805

1741

}

1806

1742

client_config = configparser.SafeConfigParser(client_defaults)

1807

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

1808

"clients.conf"))

1743

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

1744

u"clients.conf"))

1809

1745

1810

1746

global mandos_dbus_service

1811

1747

mandos_dbus_service = None

1812

1748

1813

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

1814

server_settings["port"]),

1749

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

1750

server_settings[u"port"]),

1815

1751

ClientHandler,

1816

interface=(server_settings["interface"]

1752

interface=(server_settings[u"interface"]

1817

1753

or None),

1818

1754

use_ipv6=use_ipv6,

1819

1755

gnutls_priority=

1820

server_settings["priority"],

1756

server_settings[u"priority"],

1821

1757

use_dbus=use_dbus)

1822

if not debug:

1823

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

1824

try:

1825

pidfile = open(pidfilename, "w")

1826

except IOError:

1827

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

1758

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

1759

try:

1760

pidfile = open(pidfilename, u"w")

1761

except IOError:

1762

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

1828

1763

1829

1764

try:

1830

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

1831

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

1765

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

1766

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

1832

1767

except KeyError:

1833

1768

try:

1834

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

1835

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

1769

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

1770

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

1836

1771

except KeyError:

1837

1772

try:

1838

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

1839

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

1773

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

1774

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

1840

1775

except KeyError:

1841

1776

uid = 65534

1842

1777

gid = 65534

1843

1778

try:

1844

1779

os.setgid(gid)

1845

1780

os.setuid(uid)

1846

except OSError as error:

1781

except OSError, error:

1847

1782

if error[0] != errno.EPERM:

1848

1783

raise error

1849

1784

1864

1799

1865

1800

@gnutls.library.types.gnutls_log_func

1866

1801

def debug_gnutls(level, string):

1867

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

1802

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

1868

1803

1869

1804

(gnutls.library.functions

1870

1805

.gnutls_global_set_log_function(debug_gnutls))

1878

1813

# No console logging

1879

1814

logger.removeHandler(console)

1880

1815

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()

1885

1816

1886

1817

global main_loop

1887

1818

# From the Avahi example code

1891

1822

# End of Avahi example code

1892

1823

if use_dbus:

1893

1824

try:

1894

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

1825

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

1895

1826

bus, do_not_queue=True)

1896

except dbus.exceptions.NameExistsException as e:

1897

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

1827

except dbus.exceptions.NameExistsException, e:

1828

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

1898

1829

use_dbus = False

1899

server_settings["use_dbus"] = False

1830

server_settings[u"use_dbus"] = False

1900

1831

tcp_server.use_dbus = False

1901

1832

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1902

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

1903

servicetype = "_mandos._tcp",

1833

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

1834

servicetype = u"_mandos._tcp",

1904

1835

protocol = protocol, bus = bus)

1905

1836

if server_settings["interface"]:

1906

1837

service.interface = (if_nametoindex

1907

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

1908

1838

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

1839

1840

if not debug:

1841

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

1842

daemon()

1843

1909

1844

global multiprocessing_manager

1910

1845

multiprocessing_manager = multiprocessing.Manager()

1911

1846

1930

1865

client_config, section)))

1931

1866

for section in client_config.sections()))

1932

1867

if not tcp_server.clients:

1933

logger.warning("No clients defined")

1868

logger.warning(u"No clients defined")

1934

1869

1870

try:

1871

with pidfile:

1872

pid = os.getpid()

1873

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

1874

del pidfile

1875

except IOError:

1876

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

1877

pidfilename, pid)

1878

except NameError:

1879

# "pidfile" was never created

1880

pass

1881

del pidfilename

1882

1935

1883

if not debug:

1936

try:

1937

with pidfile:

1938

pid = os.getpid()

1939

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

1940

del pidfile

1941

except IOError:

1942

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

1943

pidfilename, pid)

1944

except NameError:

1945

# "pidfile" was never created

1946

pass

1947

del pidfilename

1948

1949

1884

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

1950

1951

1885

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

1952

1886

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

1953

1887

1955

1889

class MandosDBusService(dbus.service.Object):

1956

1890

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

1957

1891

def __init__(self):

1958

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

1959

_interface = "se.bsnet.fukt.Mandos"

1892

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

1893

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

1960

1894

1961

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

1895

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

1962

1896

def ClientAdded(self, objpath):

1963

1897

"D-Bus signal"

1964

1898

pass

1965

1899

1966

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

1900

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

1967

1901

def ClientNotFound(self, fingerprint, address):

1968

1902

"D-Bus signal"

1969

1903

pass

1970

1904

1971

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

1905

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

1972

1906

def ClientRemoved(self, objpath, name):

1973

1907

"D-Bus signal"

1974

1908

pass

1975

1909

1976

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

1910

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

1977

1911

def GetAllClients(self):

1978

1912

"D-Bus method"

1979

1913

return dbus.Array(c.dbus_object_path

1980

1914

for c in tcp_server.clients)

1981

1915

1982

1916

@dbus.service.method(_interface,

1983

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

1917

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

1984

1918

def GetAllClientsWithProperties(self):

1985

1919

"D-Bus method"

1986

1920

return dbus.Dictionary(

1987

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

1921

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

1988

1922

for c in tcp_server.clients),

1989

signature="oa{sv}")

1923

signature=u"oa{sv}")

1990

1924

1991

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

1925

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

1992

1926

def RemoveClient(self, object_path):

1993

1927

"D-Bus method"

1994

1928

for c in tcp_server.clients:

2036

1970

# Find out what port we got

2037

1971

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

2038

1972

if use_ipv6:

2039

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

1973

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

2040

1974

" flowinfo %d, scope_id %d"

2041

1975

% tcp_server.socket.getsockname())

2042

1976

else: # IPv4

2043

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

1977

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

2044

1978

% tcp_server.socket.getsockname())

2045

1979

2046

1980

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

2049

1983

# From the Avahi example code

2050

1984

try:

2051

1985

service.activate()

2052

except dbus.exceptions.DBusException as error:

2053

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

1986

except dbus.exceptions.DBusException, error:

1987

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

2054

1988

cleanup()

2055

1989

sys.exit(1)

2056

1990

# End of Avahi example code

2060

1994

(tcp_server.handle_request

2061

1995

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

2062

1996

2063

logger.debug("Starting main loop")

1997

logger.debug(u"Starting main loop")

2064

1998

main_loop.run()

2065

except AvahiError as error:

2066

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

1999

except AvahiError, error:

2000

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

2067

2001

cleanup()

2068

2002

sys.exit(1)

2069

2003

except KeyboardInterrupt:

2070

2004

if debug:

2071

print("", file=sys.stderr)

2072

logger.debug("Server received KeyboardInterrupt")

2073

logger.debug("Server exiting")

2005

print >> sys.stderr

2006

logger.debug(u"Server received KeyboardInterrupt")

2007

logger.debug(u"Server exiting")

2074

2008

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

2075

2009

cleanup()

2076

2010