/mandos/trunk : revision 482

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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 = "1.3.0"

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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.group is not None:

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self.group.Reset()

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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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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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def add(self):

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

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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.remove()

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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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follow_name_owner_changes=True),

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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.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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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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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]:

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logger.error(bad_states[state])

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

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

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Attributes:

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D-Bus identifiers

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

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

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

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

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to see if the client lives.

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'None' if no process is running.

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checker_callback_tag: a gobject event source tag, or None

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checker_command: string; External command which is run to check

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if client lives. %() expansions are done at

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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uniquely identify the client

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

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host: string; available for use by the checker command

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

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

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

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

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last_enabled: datetime.datetime(); (UTC)

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enabled: bool()

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

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D-Bus identifiers

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

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

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until this client is disabled

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

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

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

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to see if the client lives.

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'None' if no process is running.

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checker_initiator_tag: a gobject event source tag, or None

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disable_initiator_tag: - '' -

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checker_callback_tag: - '' -

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

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client lives. %() expansions are done at

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

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

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current_checker_command: string; current running checker_command

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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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runtime_expansions: Allowed attributes for runtime expansion.

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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(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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469

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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command = self.checker_command % self.host

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except TypeError:

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# Escape attributes for the shell

453

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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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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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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499

try:

467

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

500

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,

475

shell=True, cwd=u"/")

508

shell=True, cwd="/")

476

509

self.checker_callback_tag = (gobject.child_watch_add

477

510

(self.checker.pid,

478

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self.checker_callback,

483

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if pid:

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gobject.source_remove(self.checker_callback_tag)

485

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self.checker_callback(pid, status, command)

486

except OSError, error:

487

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

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except OSError as error:

520

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

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521

error)

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522

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

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return True

494

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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

497

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

530

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

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531

return

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

532

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

500

533

try:

501

534

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

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#time.sleep(0.5)

503

536

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

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

505

except OSError, error:

538

except OSError as error:

506

539

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

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raise

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541

self.checker = None

509

542

510

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

511

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

543

def dbus_service_property(dbus_interface, signature="v",

544

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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547

521

554

"""

522

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

523

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

524

if byte_arrays and signature != u"ay":

525

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

526

u" signature %r" % signature)

557

if byte_arrays and signature != "ay":

558

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

559

" signature %r" % signature)

527

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def decorator(func):

528

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func._dbus_is_property = True

529

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func._dbus_interface = dbus_interface

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func._dbus_signature = signature

531

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func._dbus_access = access

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func._dbus_name = func.__name__

533

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

566

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

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567

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

535

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

568

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

536

569

return func

537

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return decorator

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571

566

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567

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@staticmethod

568

601

def _is_dbus_property(obj):

569

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

602

return getattr(obj, "_dbus_is_property", False)

570

603

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604

def _get_all_dbus_properties(self):

572

605

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

580

613

property with the specified name and interface.

581

614

"""

582

615

for name in (property_name,

583

property_name + u"_dbus_property"):

616

property_name + "_dbus_property"):

584

617

prop = getattr(self, name, None)

585

618

if (prop is None

586

619

or not self._is_dbus_property(prop)

590

623

continue

591

624

return prop

592

625

# No such property

593

raise DBusPropertyNotFound(self.dbus_object_path + u":"

594

+ interface_name + u"."

626

raise DBusPropertyNotFound(self.dbus_object_path + ":"

627

+ interface_name + "."

595

628

+ property_name)

596

629

597

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

598

out_signature=u"v")

630

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

631

out_signature="v")

599

632

def Get(self, interface_name, property_name):

600

633

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

601

634

"""

602

635

prop = self._get_dbus_property(interface_name, property_name)

603

if prop._dbus_access == u"write":

636

if prop._dbus_access == "write":

604

637

raise DBusPropertyAccessException(property_name)

605

638

value = prop()

606

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

639

if not hasattr(value, "variant_level"):

607

640

return value

608

641

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

609

642

610

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

643

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

611

644

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

612

645

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

613

646

"""

614

647

prop = self._get_dbus_property(interface_name, property_name)

615

if prop._dbus_access == u"read":

648

if prop._dbus_access == "read":

616

649

raise DBusPropertyAccessException(property_name)

617

if prop._dbus_get_args_options[u"byte_arrays"]:

650

if prop._dbus_get_args_options["byte_arrays"]:

618

651

# The byte_arrays option is not supported yet on

619

652

# signatures other than "ay".

620

if prop._dbus_signature != u"ay":

653

if prop._dbus_signature != "ay":

621

654

raise ValueError

622

655

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

623

656

for byte in value))

624

657

prop(value)

625

658

626

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

627

out_signature=u"a{sv}")

659

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

660

out_signature="a{sv}")

628

661

def GetAll(self, interface_name):

629

662

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

630

663

standard.

638

671

# Interface non-empty but did not match

639

672

continue

640

673

# Ignore write-only properties

641

if prop._dbus_access == u"write":

674

if prop._dbus_access == "write":

642

675

continue

643

676

value = prop()

644

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

677

if not hasattr(value, "variant_level"):

645

678

all[name] = value

646

679

continue

647

680

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

648

681

value.variant_level+1)

649

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

682

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

650

683

651

684

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

652

out_signature=u"s",

685

out_signature="s",

653

686

path_keyword='object_path',

654

687

connection_keyword='connection')

655

688

def Introspect(self, object_path, connection):

660

693

try:

661

694

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

662

695

def make_tag(document, name, prop):

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)

696

e = document.createElement("property")

697

e.setAttribute("name", name)

698

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

699

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

667

700

return e

668

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

701

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

669

702

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

670

703

for name, prop

671

704

in self._get_all_dbus_properties()

672

705

if prop._dbus_interface

673

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

706

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

674

707

if_tag.appendChild(tag)

675

708

# Add the names to the return values for the

676

709

# "org.freedesktop.DBus.Properties" methods

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")

710

if (if_tag.getAttribute("name")

711

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

712

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

713

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

714

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

715

if (arg.getAttribute("direction")

716

== "out"):

717

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

718

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

719

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

720

if (arg.getAttribute("direction")

721

== "out"):

722

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

723

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

691

724

document.unlink()

692

725

except (AttributeError, xml.dom.DOMException,

693

xml.parsers.expat.ExpatError), error:

694

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

726

xml.parsers.expat.ExpatError) as error:

727

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

695

728

error)

696

729

return xmlstring

697

730

703

736

dbus_object_path: dbus.ObjectPath

704

737

bus: dbus.SystemBus()

705

738

"""

739

740

runtime_expansions = (Client.runtime_expansions

741

+ ("dbus_object_path",))

742

706

743

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

707

744

708

745

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

711

748

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

712

749

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

713

750

# the D-Bus

751

client_object_name = unicode(self.name).translate(

752

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

753

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

714

754

self.dbus_object_path = (dbus.ObjectPath

715

(u"/clients/"

716

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

755

("/clients/" + client_object_name))

717

756

DBusObjectWithProperties.__init__(self, self.bus,

718

757

self.dbus_object_path)

719

758

726

765

if (hasattr(self, "dbus_object_path")

727

766

and bval is not bool(old_value)):

728

767

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

729

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

768

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

730

769

dbus_bool)

731

770

732

771

approvals_pending = property(_get_approvals_pending,

740

779

variant_level=variant_level)

741

780

742

781

def enable(self):

743

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

782

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

744

783

r = Client.enable(self)

745

784

if oldstate != self.enabled:

746

785

# Emit D-Bus signals

747

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

786

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

748

787

dbus.Boolean(True, variant_level=1))

749

788

self.PropertyChanged(

750

dbus.String(u"LastEnabled"),

789

dbus.String("LastEnabled"),

751

790

self._datetime_to_dbus(self.last_enabled,

752

791

variant_level=1))

753

792

return r

754

793

755

794

def disable(self, quiet = False):

756

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

795

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

757

796

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

758

797

if not quiet and oldstate != self.enabled:

759

798

# Emit D-Bus signal

760

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

799

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

761

800

dbus.Boolean(False, variant_level=1))

762

801

return r

763

802

766

805

self.remove_from_connection()

767

806

except LookupError:

768

807

pass

769

if hasattr(DBusObjectWithProperties, u"__del__"):

808

if hasattr(DBusObjectWithProperties, "__del__"):

770

809

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

771

810

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

772

811

775

814

self.checker_callback_tag = None

776

815

self.checker = None

777

816

# Emit D-Bus signal

778

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

817

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

779

818

dbus.Boolean(False, variant_level=1))

780

819

if os.WIFEXITED(condition):

781

820

exitstatus = os.WEXITSTATUS(condition)

793

832

*args, **kwargs)

794

833

795

834

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

796

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

835

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

797

836

# Emit D-Bus signal

798

837

self.PropertyChanged(

799

dbus.String(u"LastCheckedOK"),

838

dbus.String("LastCheckedOK"),

800

839

(self._datetime_to_dbus(self.last_checked_ok,

801

840

variant_level=1)))

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastApprovalRequest"),

847

(self._datetime_to_dbus(self.last_approval_request,

848

variant_level=1)))

802

849

return r

803

850

804

851

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

814

861

# Emit D-Bus signal

815

862

self.CheckerStarted(self.current_checker_command)

816

863

self.PropertyChanged(

817

dbus.String(u"CheckerRunning"),

864

dbus.String("CheckerRunning"),

818

865

dbus.Boolean(True, variant_level=1))

819

866

return r

820

867

821

868

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

822

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

869

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

823

870

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

824

871

if (old_checker is not None

825

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

826

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

872

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

873

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

827

874

dbus.Boolean(False, variant_level=1))

828

875

return r

829

876

840

887

841

888

842

889

## D-Bus methods, signals & properties

843

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

890

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

844

891

845

892

## Signals

846

893

847

894

# CheckerCompleted - signal

848

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

895

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

849

896

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

850

897

"D-Bus signal"

851

898

pass

852

899

853

900

# CheckerStarted - signal

854

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

901

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

855

902

def CheckerStarted(self, command):

856

903

"D-Bus signal"

857

904

pass

858

905

859

906

# PropertyChanged - signal

860

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

907

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

861

908

def PropertyChanged(self, property, value):

862

909

"D-Bus signal"

863

910

pass

872

919

pass

873

920

874

921

# Rejected - signal

875

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

922

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

876

923

def Rejected(self, reason):

877

924

"D-Bus signal"

878

925

pass

879

926

880

927

# NeedApproval - signal

881

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

928

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

882

929

def NeedApproval(self, timeout, default):

883

930

"D-Bus signal"

884

pass

931

return self.need_approval()

885

932

886

933

## Methods

887

934

888

935

# Approve - method

889

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

936

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

890

937

def Approve(self, value):

891

938

self.approve(value)

892

939

893

940

# CheckedOK - method

894

941

@dbus.service.method(_interface)

895

942

def CheckedOK(self):

896

return self.checked_ok()

943

self.checked_ok()

897

944

898

945

# Enable - method

899

946

@dbus.service.method(_interface)

921

968

## Properties

922

969

923

970

# ApprovalPending - property

924

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

971

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

925

972

def ApprovalPending_dbus_property(self):

926

973

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

927

974

928

975

# ApprovedByDefault - property

929

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

930

access=u"readwrite")

976

@dbus_service_property(_interface, signature="b",

977

access="readwrite")

931

978

def ApprovedByDefault_dbus_property(self, value=None):

932

979

if value is None: # get

933

980

return dbus.Boolean(self.approved_by_default)

934

981

self.approved_by_default = bool(value)

935

982

# Emit D-Bus signal

936

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

983

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

937

984

dbus.Boolean(value, variant_level=1))

938

985

939

986

# ApprovalDelay - property

940

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

941

access=u"readwrite")

987

@dbus_service_property(_interface, signature="t",

988

access="readwrite")

942

989

def ApprovalDelay_dbus_property(self, value=None):

943

990

if value is None: # get

944

991

return dbus.UInt64(self.approval_delay_milliseconds())

945

992

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

946

993

# Emit D-Bus signal

947

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

994

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

948

995

dbus.UInt64(value, variant_level=1))

949

996

950

997

# ApprovalDuration - property

951

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

952

access=u"readwrite")

998

@dbus_service_property(_interface, signature="t",

999

access="readwrite")

953

1000

def ApprovalDuration_dbus_property(self, value=None):

954

1001

if value is None: # get

955

1002

return dbus.UInt64(self._timedelta_to_milliseconds(

956

1003

self.approval_duration))

957

1004

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

958

1005

# Emit D-Bus signal

959

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

1006

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

960

1007

dbus.UInt64(value, variant_level=1))

961

1008

962

1009

# Name - property

963

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

1010

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

964

1011

def Name_dbus_property(self):

965

1012

return dbus.String(self.name)

966

1013

967

1014

# Fingerprint - property

968

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

1015

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

969

1016

def Fingerprint_dbus_property(self):

970

1017

return dbus.String(self.fingerprint)

971

1018

972

1019

# Host - property

973

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

974

access=u"readwrite")

1020

@dbus_service_property(_interface, signature="s",

1021

access="readwrite")

975

1022

def Host_dbus_property(self, value=None):

976

1023

if value is None: # get

977

1024

return dbus.String(self.host)

978

1025

self.host = value

979

1026

# Emit D-Bus signal

980

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

1027

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

981

1028

dbus.String(value, variant_level=1))

982

1029

983

1030

# Created - property

984

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

1031

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

985

1032

def Created_dbus_property(self):

986

1033

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

987

1034

988

1035

# LastEnabled - property

989

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

1036

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

990

1037

def LastEnabled_dbus_property(self):

991

1038

if self.last_enabled is None:

992

return dbus.String(u"")

1039

return dbus.String("")

993

1040

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

994

1041

995

1042

# Enabled - property

996

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

997

access=u"readwrite")

1043

@dbus_service_property(_interface, signature="b",

1044

access="readwrite")

998

1045

def Enabled_dbus_property(self, value=None):

999

1046

if value is None: # get

1000

1047

return dbus.Boolean(self.enabled)

1004

1051

self.disable()

1005

1052

1006

1053

# LastCheckedOK - property

1007

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

1008

access=u"readwrite")

1054

@dbus_service_property(_interface, signature="s",

1055

access="readwrite")

1009

1056

def LastCheckedOK_dbus_property(self, value=None):

1010

1057

if value is not None:

1011

1058

self.checked_ok()

1012

1059

return

1013

1060

if self.last_checked_ok is None:

1014

return dbus.String(u"")

1061

return dbus.String("")

1015

1062

return dbus.String(self._datetime_to_dbus(self

1016

1063

.last_checked_ok))

1017

1064

1065

# LastApprovalRequest - property

1066

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

1067

def LastApprovalRequest_dbus_property(self):

1068

if self.last_approval_request is None:

1069

return dbus.String("")

1070

return dbus.String(self.

1071

_datetime_to_dbus(self

1072

.last_approval_request))

1073

1018

1074

# Timeout - property

1019

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

1020

access=u"readwrite")

1075

@dbus_service_property(_interface, signature="t",

1076

access="readwrite")

1021

1077

def Timeout_dbus_property(self, value=None):

1022

1078

if value is None: # get

1023

1079

return dbus.UInt64(self.timeout_milliseconds())

1024

1080

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

1025

1081

# Emit D-Bus signal

1026

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

1082

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

1027

1083

dbus.UInt64(value, variant_level=1))

1028

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

1084

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

1029

1085

return

1030

1086

# Reschedule timeout

1031

1087

gobject.source_remove(self.disable_initiator_tag)

1044

1100

(time_to_die, self.disable))

1045

1101

1046

1102

# Interval - property

1047

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

1048

access=u"readwrite")

1103

@dbus_service_property(_interface, signature="t",

1104

access="readwrite")

1049

1105

def Interval_dbus_property(self, value=None):

1050

1106

if value is None: # get

1051

1107

return dbus.UInt64(self.interval_milliseconds())

1052

1108

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

1053

1109

# Emit D-Bus signal

1054

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

1110

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

1055

1111

dbus.UInt64(value, variant_level=1))

1056

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

1112

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

1057

1113

return

1058

1114

# Reschedule checker run

1059

1115

gobject.source_remove(self.checker_initiator_tag)

1062

1118

self.start_checker() # Start one now, too

1063

1119

1064

1120

# Checker - property

1065

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

1066

access=u"readwrite")

1121

@dbus_service_property(_interface, signature="s",

1122

access="readwrite")

1067

1123

def Checker_dbus_property(self, value=None):

1068

1124

if value is None: # get

1069

1125

return dbus.String(self.checker_command)

1070

1126

self.checker_command = value

1071

1127

# Emit D-Bus signal

1072

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

1128

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

1073

1129

dbus.String(self.checker_command,

1074

1130

variant_level=1))

1075

1131

1076

1132

# CheckerRunning - property

1077

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

1078

access=u"readwrite")

1133

@dbus_service_property(_interface, signature="b",

1134

access="readwrite")

1079

1135

def CheckerRunning_dbus_property(self, value=None):

1080

1136

if value is None: # get

1081

1137

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

1085

1141

self.stop_checker()

1086

1142

1087

1143

# ObjectPath - property

1088

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

1144

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

1089

1145

def ObjectPath_dbus_property(self):

1090

1146

return self.dbus_object_path # is already a dbus.ObjectPath

1091

1147

1092

1148

# Secret = property

1093

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

1094

access=u"write", byte_arrays=True)

1149

@dbus_service_property(_interface, signature="ay",

1150

access="write", byte_arrays=True)

1095

1151

def Secret_dbus_property(self, value):

1096

1152

self.secret = str(value)

1097

1153

1132

1188

1133

1189

def handle(self):

1134

1190

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

1135

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

1191

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

1136

1192

unicode(self.client_address))

1137

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

1193

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

1138

1194

self.server.child_pipe.fileno())

1139

1195

1140

1196

session = (gnutls.connection

1147

1203

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

1148

1204

# here despite using OpenPGP certificates.

1149

1205

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"))

1206

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

1207

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

1208

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

1209

# "+DHE-DSS"))

1154

1210

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

1155

1211

priority = self.server.gnutls_priority

1156

1212

if priority is None:

1157

priority = u"NORMAL"

1213

priority = "NORMAL"

1158

1214

(gnutls.library.functions

1159

1215

.gnutls_priority_set_direct(session._c_object,

1160

1216

priority, None))

1162

1218

# Start communication using the Mandos protocol

1163

1219

# Get protocol number

1164

1220

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

1165

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

1221

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

1166

1222

try:

1167

1223

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

1168

1224

raise RuntimeError

1169

except (ValueError, IndexError, RuntimeError), error:

1170

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

1225

except (ValueError, IndexError, RuntimeError) as error:

1226

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

1171

1227

return

1172

1228

1173

1229

# Start GnuTLS connection

1174

1230

try:

1175

1231

session.handshake()

1176

except gnutls.errors.GNUTLSError, error:

1177

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

1232

except gnutls.errors.GNUTLSError as error:

1233

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

1178

1234

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

1179

1235

# established. Just abandon the request.

1180

1236

return

1181

logger.debug(u"Handshake succeeded")

1237

logger.debug("Handshake succeeded")

1182

1238

1183

1239

approval_required = False

1184

1240

try:

1185

1241

try:

1186

1242

fpr = self.fingerprint(self.peer_certificate

1187

1243

(session))

1188

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

1189

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

1244

except (TypeError,

1245

gnutls.errors.GNUTLSError) as error:

1246

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

1190

1247

return

1191

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

1248

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

1192

1249

1193

1250

try:

1194

1251

client = ProxyClient(child_pipe, fpr,

1203

1260

1204

1261

while True:

1205

1262

if not client.enabled:

1206

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

1263

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

1207

1264

client.name)

1208

1265

if self.server.use_dbus:

1209

1266

# Emit D-Bus signal

1214

1271

#We are approved or approval is disabled

1215

1272

break

1216

1273

elif client._approved is None:

1217

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

1274

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

1218

1275

client.name)

1219

1276

if self.server.use_dbus:

1220

1277

# Emit D-Bus signal

1222

1279

client.approval_delay_milliseconds(),

1223

1280

client.approved_by_default)

1224

1281

else:

1225

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

1282

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

1226

1283

client.name)

1227

1284

if self.server.use_dbus:

1228

1285

# Emit D-Bus signal

1243

1300

client.name)

1244

1301

if self.server.use_dbus:

1245

1302

# Emit D-Bus signal

1246

client.Rejected("Timed out")

1303

client.Rejected("Approval timed out")

1247

1304

return

1248

1305

else:

1249

1306

break

1254

1311

while sent_size < len(client.secret):

1255

1312

try:

1256

1313

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

1257

except (gnutls.errors.GNUTLSError), error:

1314

except gnutls.errors.GNUTLSError as error:

1258

1315

logger.warning("gnutls send failed")

1259

1316

return

1260

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

1317

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

1261

1318

sent, len(client.secret)

1262

1319

- (sent_size + sent))

1263

1320

sent_size += sent

1264

1321

1265

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

1322

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

1266

1323

# bump the timeout as if seen

1267

1324

client.checked_ok()

1268

1325

if self.server.use_dbus:

1274

1331

client.approvals_pending -= 1

1275

1332

try:

1276

1333

session.bye()

1277

except (gnutls.errors.GNUTLSError), error:

1334

except gnutls.errors.GNUTLSError as error:

1278

1335

logger.warning("GnuTLS bye failed")

1279

1336

1280

1337

@staticmethod

1291

1348

.gnutls_certificate_get_peers

1292

1349

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

1293

1350

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

1294

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

1295

u" certificate")

1351

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

1352

" certificate")

1296

1353

if list_size.value == 0:

1297

1354

return None

1298

1355

cert = cert_list[0]

1324

1381

if crtverify.value != 0:

1325

1382

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1326

1383

raise (gnutls.errors.CertificateSecurityError

1327

(u"Verify failed"))

1384

("Verify failed"))

1328

1385

# New buffer for the fingerprint

1329

1386

buf = ctypes.create_string_buffer(20)

1330

1387

buf_len = ctypes.c_size_t()

1337

1394

# Convert the buffer to a Python bytestring

1338

1395

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

1339

1396

# Convert the bytestring to hexadecimal notation

1340

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

1397

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

1341

1398

return hex_fpr

1342

1399

1343

1400

1371

1428

1372

1429

def add_pipe(self, parent_pipe):

1373

1430

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

1374

pass

1431

raise NotImplementedError

1375

1432

1376

1433

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1377

1434

socketserver.TCPServer, object):

1395

1452

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

1396

1453

if self.interface is not None:

1397

1454

if SO_BINDTODEVICE is None:

1398

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

1399

u" cannot bind to interface %s",

1455

logger.error("SO_BINDTODEVICE does not exist;"

1456

" cannot bind to interface %s",

1400

1457

self.interface)

1401

1458

else:

1402

1459

try:

1403

1460

self.socket.setsockopt(socket.SOL_SOCKET,

1404

1461

SO_BINDTODEVICE,

1405

1462

str(self.interface

1406

+ u'\0'))

1407

except socket.error, error:

1463

+ '\0'))

1464

except socket.error as error:

1408

1465

if error[0] == errno.EPERM:

1409

logger.error(u"No permission to"

1410

u" bind to interface %s",

1466

logger.error("No permission to"

1467

" bind to interface %s",

1411

1468

self.interface)

1412

1469

elif error[0] == errno.ENOPROTOOPT:

1413

logger.error(u"SO_BINDTODEVICE not available;"

1414

u" cannot bind to interface %s",

1470

logger.error("SO_BINDTODEVICE not available;"

1471

" cannot bind to interface %s",

1415

1472

self.interface)

1416

1473

else:

1417

1474

raise

1419

1476

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

1420

1477

if not self.server_address[0]:

1421

1478

if self.address_family == socket.AF_INET6:

1422

any_address = u"::" # in6addr_any

1479

any_address = "::" # in6addr_any

1423

1480

else:

1424

1481

any_address = socket.INADDR_ANY

1425

1482

self.server_address = (any_address,

1474

1531

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

1475

1532

client_object=None):

1476

1533

condition_names = {

1477

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

1478

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

1534

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

1535

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

1479

1536

# blocking).

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

1537

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

1538

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

1539

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

1483

1540

# broken, usually for pipes and

1484

1541

# sockets).

1485

1542

}

1487

1544

for cond, name in

1488

1545

condition_names.iteritems()

1489

1546

if cond & condition)

1490

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

1491

conditions_string)

1492

1493

1547

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

1494

1548

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

1495

1549

return False

1496

1550

1497

1551

# Read a request from the child

1498

1552

request = parent_pipe.recv()

1499

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

1500

1553

command = request[0]

1501

1554

1502

1555

if command == 'init':

1508

1561

client = c

1509

1562

break

1510

1563

else:

1511

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

1512

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

1564

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

1565

"dress: %s", fpr, address)

1513

1566

if self.use_dbus:

1514

1567

# Emit D-Bus signal

1515

mandos_dbus_service.ClientNotFound(fpr, address)

1568

mandos_dbus_service.ClientNotFound(fpr, address[0])

1516

1569

parent_pipe.send(False)

1517

1570

return False

1518

1571

1549

1602

def string_to_delta(interval):

1550

1603

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

1551

1604

1552

>>> string_to_delta(u'7d')

1605

>>> string_to_delta('7d')

1553

1606

datetime.timedelta(7)

1554

>>> string_to_delta(u'60s')

1607

>>> string_to_delta('60s')

1555

1608

datetime.timedelta(0, 60)

1556

>>> string_to_delta(u'60m')

1609

>>> string_to_delta('60m')

1557

1610

datetime.timedelta(0, 3600)

1558

>>> string_to_delta(u'24h')

1611

>>> string_to_delta('24h')

1559

1612

datetime.timedelta(1)

1560

>>> string_to_delta(u'1w')

1613

>>> string_to_delta('1w')

1561

1614

datetime.timedelta(7)

1562

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

1615

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

1563

1616

datetime.timedelta(0, 330)

1564

1617

"""

1565

1618

timevalue = datetime.timedelta(0)

1567

1620

try:

1568

1621

suffix = unicode(s[-1])

1569

1622

value = int(s[:-1])

1570

if suffix == u"d":

1623

if suffix == "d":

1571

1624

delta = datetime.timedelta(value)

1572

elif suffix == u"s":

1625

elif suffix == "s":

1573

1626

delta = datetime.timedelta(0, value)

1574

elif suffix == u"m":

1627

elif suffix == "m":

1575

1628

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

1576

elif suffix == u"h":

1629

elif suffix == "h":

1577

1630

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

1578

elif suffix == u"w":

1631

elif suffix == "w":

1579

1632

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

1580

1633

else:

1581

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

1582

except (ValueError, IndexError), e:

1583

raise ValueError(e.message)

1634

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

1635

except (ValueError, IndexError) as e:

1636

raise ValueError(*(e.args))

1584

1637

timevalue += delta

1585

1638

return timevalue

1586

1639

1592

1645

global if_nametoindex

1593

1646

try:

1594

1647

if_nametoindex = (ctypes.cdll.LoadLibrary

1595

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

1648

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

1596

1649

.if_nametoindex)

1597

1650

except (OSError, AttributeError):

1598

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

1651

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

1599

1652

def if_nametoindex(interface):

1600

1653

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

1601

1654

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

1602

1655

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

1603

1656

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1604

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

1657

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

1605

1658

interface))

1606

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

1659

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

1607

1660

ifreq[16:20])[0]

1608

1661

return interface_index

1609

1662

return if_nametoindex(interface)

1617

1670

sys.exit()

1618

1671

os.setsid()

1619

1672

if not nochdir:

1620

os.chdir(u"/")

1673

os.chdir("/")

1621

1674

if os.fork():

1622

1675

sys.exit()

1623

1676

if not noclose:

1625

1678

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

1626

1679

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

1627

1680

raise OSError(errno.ENODEV,

1628

u"%s not a character device"

1681

"%s not a character device"

1629

1682

% os.path.devnull)

1630

1683

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

1631

1684

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

1639

1692

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

1640

1693

# Parsing of options, both command line and config file

1641

1694

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]

1695

parser = argparse.ArgumentParser()

1696

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

1697

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

1698

help="show version number and exit")

1699

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

1700

help="Bind to interface IF")

1701

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

1702

help="Address to listen for requests on")

1703

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

1704

help="Port number to receive requests on")

1705

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

1706

help="Run self-test")

1707

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

1708

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

1709

" to terminal")

1710

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

1711

help="Debug level for stdout output")

1712

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

1713

" priority string (see GnuTLS documentation)")

1714

parser.add_argument("--servicename",

1715

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

1716

parser.add_argument("--configdir",

1717

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

1718

help="Directory to search for configuration"

1719

" files")

1720

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

1721

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

1722

" system bus interface")

1723

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

1724

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

1725

options = parser.parse_args()

1670

1726

1671

1727

if options.check:

1672

1728

import doctest

1674

1730

sys.exit()

1675

1731

1676

1732

# Default values for config file for server-global settings

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"",

1733

server_defaults = { "interface": "",

1734

"address": "",

1735

"port": "",

1736

"debug": "False",

1737

"priority":

1738

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

1739

"servicename": "Mandos",

1740

"use_dbus": "True",

1741

"use_ipv6": "True",

1742

"debuglevel": "",

1687

1743

}

1688

1744

1689

1745

# Parse config file for server-global settings

1690

1746

server_config = configparser.SafeConfigParser(server_defaults)

1691

1747

del server_defaults

1692

1748

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

1693

u"mandos.conf"))

1749

"mandos.conf"))

1694

1750

# Convert the SafeConfigParser object to a dict

1695

1751

server_settings = server_config.defaults()

1696

1752

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

1697

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

1698

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

1753

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

1754

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

1699

1755

option)

1700

1756

if server_settings["port"]:

1701

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

1702

u"port")

1757

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

1758

"port")

1703

1759

del server_config

1704

1760

1705

1761

# Override the settings from the config file with command line

1706

1762

# options, if set.

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"):

1763

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

1764

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

1765

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

1710

1766

value = getattr(options, option)

1711

1767

if value is not None:

1712

1768

server_settings[option] = value

1720

1776

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

1721

1777

1722

1778

# For convenience

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"]

1779

debug = server_settings["debug"]

1780

debuglevel = server_settings["debuglevel"]

1781

use_dbus = server_settings["use_dbus"]

1782

use_ipv6 = server_settings["use_ipv6"]

1727

1783

1728

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

1784

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

1729

1785

syslogger.setFormatter(logging.Formatter

1730

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

1731

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

1732

% server_settings[u"servicename"]))

1786

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

1787

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

1788

% server_settings["servicename"]))

1733

1789

1734

1790

# Parse config file with clients

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",

1791

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

1792

"interval": "5m",

1793

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

1794

"host": "",

1795

"approval_delay": "0s",

1796

"approval_duration": "1s",

1741

1797

}

1742

1798

client_config = configparser.SafeConfigParser(client_defaults)

1743

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

1744

u"clients.conf"))

1799

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

1800

"clients.conf"))

1745

1801

1746

1802

global mandos_dbus_service

1747

1803

mandos_dbus_service = None

1748

1804

1749

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

1750

server_settings[u"port"]),

1805

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

1806

server_settings["port"]),

1751

1807

ClientHandler,

1752

interface=(server_settings[u"interface"]

1808

interface=(server_settings["interface"]

1753

1809

or None),

1754

1810

use_ipv6=use_ipv6,

1755

1811

gnutls_priority=

1756

server_settings[u"priority"],

1812

server_settings["priority"],

1757

1813

use_dbus=use_dbus)

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)

1814

if not debug:

1815

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

1816

try:

1817

pidfile = open(pidfilename, "w")

1818

except IOError:

1819

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

1763

1820

1764

1821

try:

1765

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

1766

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

1822

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

1823

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

1767

1824

except KeyError:

1768

1825

try:

1769

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

1770

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

1826

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

1827

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

1771

1828

except KeyError:

1772

1829

try:

1773

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

1774

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

1830

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

1831

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

1775

1832

except KeyError:

1776

1833

uid = 65534

1777

1834

gid = 65534

1778

1835

try:

1779

1836

os.setgid(gid)

1780

1837

os.setuid(uid)

1781

except OSError, error:

1838

except OSError as error:

1782

1839

if error[0] != errno.EPERM:

1783

1840

raise error

1784

1841

1799

1856

1800

1857

@gnutls.library.types.gnutls_log_func

1801

1858

def debug_gnutls(level, string):

1802

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

1859

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

1803

1860

1804

1861

(gnutls.library.functions

1805

1862

.gnutls_global_set_log_function(debug_gnutls))

1813

1870

# No console logging

1814

1871

logger.removeHandler(console)

1815

1872

1873

# Need to fork before connecting to D-Bus

1874

if not debug:

1875

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

1876

daemon()

1816

1877

1817

1878

global main_loop

1818

1879

# From the Avahi example code

1822

1883

# End of Avahi example code

1823

1884

if use_dbus:

1824

1885

try:

1825

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

1886

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

1826

1887

bus, do_not_queue=True)

1827

except dbus.exceptions.NameExistsException, e:

1828

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

1888

except dbus.exceptions.NameExistsException as e:

1889

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

1829

1890

use_dbus = False

1830

server_settings[u"use_dbus"] = False

1891

server_settings["use_dbus"] = False

1831

1892

tcp_server.use_dbus = False

1832

1893

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1833

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

1834

servicetype = u"_mandos._tcp",

1894

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

1895

servicetype = "_mandos._tcp",

1835

1896

protocol = protocol, bus = bus)

1836

1897

if server_settings["interface"]:

1837

1898

service.interface = (if_nametoindex

1838

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

1839

1840

if not debug:

1841

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

1842

daemon()

1843

1899

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

1900

1844

1901

global multiprocessing_manager

1845

1902

multiprocessing_manager = multiprocessing.Manager()

1846

1903

1865

1922

client_config, section)))

1866

1923

for section in client_config.sections()))

1867

1924

if not tcp_server.clients:

1868

logger.warning(u"No clients defined")

1925

logger.warning("No clients defined")

1869

1926

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

1883

1927

if not debug:

1928

try:

1929

with pidfile:

1930

pid = os.getpid()

1931

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

1932

del pidfile

1933

except IOError:

1934

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

1935

pidfilename, pid)

1936

except NameError:

1937

# "pidfile" was never created

1938

pass

1939

del pidfilename

1940

1884

1941

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

1942

1885

1943

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

1886

1944

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

1887

1945

1889

1947

class MandosDBusService(dbus.service.Object):

1890

1948

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

1891

1949

def __init__(self):

1892

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

1893

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

1950

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

1951

_interface = "se.bsnet.fukt.Mandos"

1894

1952

1895

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

1953

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

1896

1954

def ClientAdded(self, objpath):

1897

1955

"D-Bus signal"

1898

1956

pass

1899

1957

1900

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

1958

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

1901

1959

def ClientNotFound(self, fingerprint, address):

1902

1960

"D-Bus signal"

1903

1961

pass

1904

1962

1905

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

1963

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

1906

1964

def ClientRemoved(self, objpath, name):

1907

1965

"D-Bus signal"

1908

1966

pass

1909

1967

1910

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

1968

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

1911

1969

def GetAllClients(self):

1912

1970

"D-Bus method"

1913

1971

return dbus.Array(c.dbus_object_path

1914

1972

for c in tcp_server.clients)

1915

1973

1916

1974

@dbus.service.method(_interface,

1917

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

1975

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

1918

1976

def GetAllClientsWithProperties(self):

1919

1977

"D-Bus method"

1920

1978

return dbus.Dictionary(

1921

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

1979

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

1922

1980

for c in tcp_server.clients),

1923

signature=u"oa{sv}")

1981

signature="oa{sv}")

1924

1982

1925

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

1983

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

1926

1984

def RemoveClient(self, object_path):

1927

1985

"D-Bus method"

1928

1986

for c in tcp_server.clients:

1970

2028

# Find out what port we got

1971

2029

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

1972

2030

if use_ipv6:

1973

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

2031

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

1974

2032

" flowinfo %d, scope_id %d"

1975

2033

% tcp_server.socket.getsockname())

1976

2034

else: # IPv4

1977

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

2035

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

1978

2036

% tcp_server.socket.getsockname())

1979

2037

1980

2038

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

1983

2041

# From the Avahi example code

1984

2042

try:

1985

2043

service.activate()

1986

except dbus.exceptions.DBusException, error:

1987

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

2044

except dbus.exceptions.DBusException as error:

2045

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

1988

2046

cleanup()

1989

2047

sys.exit(1)

1990

2048

# End of Avahi example code

1994

2052

(tcp_server.handle_request

1995

2053

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

1996

2054

1997

logger.debug(u"Starting main loop")

2055

logger.debug("Starting main loop")

1998

2056

main_loop.run()

1999

except AvahiError, error:

2000

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

2057

except AvahiError as error:

2058

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

2001

2059

cleanup()

2002

2060

sys.exit(1)

2003

2061

except KeyboardInterrupt:

2004

2062

if debug:

2005

print >> sys.stderr

2006

logger.debug(u"Server received KeyboardInterrupt")

2007

logger.debug(u"Server exiting")

2063

print("", file=sys.stderr)

2064

logger.debug("Server received KeyboardInterrupt")

2065

logger.debug("Server exiting")

2008

2066

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

2009

2067

cleanup()

2010

2068