/mandos/trunk : revision 474

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

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#

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# Everything else is

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#

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

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

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

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#

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from __future__ import division, with_statement, absolute_import

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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import socket

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import optparse

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import logging

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import logging.handlers

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import pwd

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from contextlib import closing

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import contextlib

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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import multiprocessing

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import dbus

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import dbus.service

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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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.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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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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u" after %i retries, exiting.",

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError(u"Too many renames")

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

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

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unicode(self.name))

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raise AvahiServiceError("Too many renames")

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

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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

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

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% self.name))

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self.remove()

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self.add()

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try:

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self.add()

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except dbus.exceptions.DBusException, 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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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.entry_group_state_changed)

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

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self

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.entry_group_state_changed)

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

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self.name, self.type)

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self.group.AddService(

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self.interface,

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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

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logger.debug("Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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

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unicode(error))

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raise AvahiGroupError(u"State changed: %s"

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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self.group = 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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if state == avahi.SERVER_COLLISION:

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

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logger.error("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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self.bus.get_object(avahi.DBUS_NAME,

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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(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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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 invalid

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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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_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_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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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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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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"""

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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 _datetime_to_milliseconds(dt):

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"Convert a datetime.datetime() to milliseconds"

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return ((dt.days * 24 * 60 * 60 * 1000)

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+ (dt.seconds * 1000)

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+ (dt.microseconds // 1000))

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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return ((td.days * 24 * 60 * 60 * 1000)

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return self._datetime_to_milliseconds(self.timeout)

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return self._timedelta_to_milliseconds(self.timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return self._datetime_to_milliseconds(self.interval)

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return self._timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return self._timedelta_to_milliseconds(self.approval_delay)

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def __init__(self, name = None, disable_hook=None, config=None):

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"""Note: the 'checker' key in 'config' sets the

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self.name = name

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if config is None:

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config = {}

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

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

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

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

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

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if u"secret" in config:

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

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elif u"secfile" in config:

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with closing(open(os.path.expanduser

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(os.path.expandvars

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(config[u"secfile"])))) as secfile:

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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["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("approved_by_default",

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True)

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self.approvals_pending = 0

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self.approval_delay = string_to_delta(

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config["approval_delay"])

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self.approval_duration = string_to_delta(

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config["approval_duration"])

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

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def send_changedstate(self):

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self.changedstate.acquire()

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self.changedstate.notify_all()

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self.changedstate.release()

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def enable(self):

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

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

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

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# Already enabled

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return

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self.send_changedstate()

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self.last_enabled = datetime.datetime.utcnow()

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# Schedule a new checker to be started an 'interval' from now,

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# and every interval from then on.

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self.checker_initiator_tag = (gobject.timeout_add

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(self.interval_milliseconds(),

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self.start_checker))

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# Also start a new checker *right now*.

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self.start_checker()

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

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self.disable_initiator_tag = (gobject.timeout_add

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(self.timeout_milliseconds(),

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self.disable))

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self.enabled = True

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# Also start a new checker *right now*.

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self.start_checker()

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def disable(self):

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def disable(self, quiet=True):

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"""Disable this client."""

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

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return 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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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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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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# client would inevitably timeout, since no checker would get

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# a chance to run to completion. If we instead leave running

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# checkers alone, the checker would have to take more time

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# than 'timeout' for the client to be declared invalid, which

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# is as it should be.

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# than 'timeout' for the client to be disabled, which is as it

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# should be.

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# If a checker exists, make sure it is not a zombie

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if self.checker is not None:

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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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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(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

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

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' %s', self.checker_command, error)

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return True # Try again later

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self.current_checker_command = command

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try:

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

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

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command, self.name)

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

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

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# always replaced by /dev/null.)

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self.checker = subprocess.Popen(command,

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close_fds=True,

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shell=True, cwd=u"/")

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shell=True, cwd="/")

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self.checker_callback_tag = (gobject.child_watch_add

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(self.checker.pid,

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self.checker_callback,

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback(pid, status, command)

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except OSError, error:

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

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

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error)

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

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return True

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if self.checker_callback_tag:

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback_tag = None

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

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

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return

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

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

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try:

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

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#os.sleep(0.5)

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#time.sleep(0.5)

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

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

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except OSError, error:

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

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raise

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self.checker = None

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def still_valid(self):

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"""Has the timeout not yet passed for this client?"""

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

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return False

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now = datetime.datetime.utcnow()

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if self.last_checked_ok is None:

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return now < (self.created + self.timeout)

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else:

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return now < (self.last_checked_ok + self.timeout)

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class ClientDBus(Client, dbus.service.Object):

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def dbus_service_property(dbus_interface, signature="v",

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access="readwrite", byte_arrays=False):

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"""Decorators for marking methods of a DBusObjectWithProperties to

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become properties on the D-Bus.

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The decorated method will be called with no arguments by "Get"

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and with one argument by "Set".

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The parameters, where they are supported, are the same as

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dbus.service.method, except there is only "signature", since the

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type from Get() and the type sent to Set() is the same.

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"""

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

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

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if byte_arrays and signature != "ay":

539

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

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" signature %r" % signature)

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def decorator(func):

542

func._dbus_is_property = True

543

func._dbus_interface = dbus_interface

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func._dbus_signature = signature

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func._dbus_access = access

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func._dbus_name = func.__name__

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

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

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func._dbus_get_args_options = {'byte_arrays': byte_arrays }

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return func

551

return decorator

552

553

554

class DBusPropertyException(dbus.exceptions.DBusException):

555

"""A base class for D-Bus property-related exceptions

556

"""

557

def __unicode__(self):

558

return unicode(str(self))

559

560

561

class DBusPropertyAccessException(DBusPropertyException):

562

"""A property's access permissions disallows an operation.

563

"""

564

pass

565

566

567

class DBusPropertyNotFound(DBusPropertyException):

568

"""An attempt was made to access a non-existing property.

569

"""

570

pass

571

572

573

class DBusObjectWithProperties(dbus.service.Object):

574

"""A D-Bus object with properties.

575

576

Classes inheriting from this can use the dbus_service_property

577

decorator to expose methods as D-Bus properties. It exposes the

578

standard Get(), Set(), and GetAll() methods on the D-Bus.

579

"""

580

581

@staticmethod

582

def _is_dbus_property(obj):

583

return getattr(obj, "_dbus_is_property", False)

584

585

def _get_all_dbus_properties(self):

586

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

587

"""

588

return ((prop._dbus_name, prop)

589

for name, prop in

590

inspect.getmembers(self, self._is_dbus_property))

591

592

def _get_dbus_property(self, interface_name, property_name):

593

"""Returns a bound method if one exists which is a D-Bus

594

property with the specified name and interface.

595

"""

596

for name in (property_name,

597

property_name + "_dbus_property"):

598

prop = getattr(self, name, None)

599

if (prop is None

600

or not self._is_dbus_property(prop)

601

or prop._dbus_name != property_name

602

or (interface_name and prop._dbus_interface

603

and interface_name != prop._dbus_interface)):

604

continue

605

return prop

606

# No such property

607

raise DBusPropertyNotFound(self.dbus_object_path + ":"

608

+ interface_name + "."

609

+ property_name)

610

611

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

612

out_signature="v")

613

def Get(self, interface_name, property_name):

614

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

615

"""

616

prop = self._get_dbus_property(interface_name, property_name)

617

if prop._dbus_access == "write":

618

raise DBusPropertyAccessException(property_name)

619

value = prop()

620

if not hasattr(value, "variant_level"):

621

return value

622

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

623

624

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

625

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

626

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

627

"""

628

prop = self._get_dbus_property(interface_name, property_name)

629

if prop._dbus_access == "read":

630

raise DBusPropertyAccessException(property_name)

631

if prop._dbus_get_args_options["byte_arrays"]:

632

# The byte_arrays option is not supported yet on

633

# signatures other than "ay".

634

if prop._dbus_signature != "ay":

635

raise ValueError

636

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

637

for byte in value))

638

prop(value)

639

640

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

641

out_signature="a{sv}")

642

def GetAll(self, interface_name):

643

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

644

standard.

645

646

Note: Will not include properties with access="write".

647

"""

648

all = {}

649

for name, prop in self._get_all_dbus_properties():

650

if (interface_name

651

and interface_name != prop._dbus_interface):

652

# Interface non-empty but did not match

653

continue

654

# Ignore write-only properties

655

if prop._dbus_access == "write":

656

continue

657

value = prop()

658

if not hasattr(value, "variant_level"):

659

all[name] = value

660

continue

661

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

662

value.variant_level+1)

663

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

664

665

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

666

out_signature="s",

667

path_keyword='object_path',

668

connection_keyword='connection')

669

def Introspect(self, object_path, connection):

670

"""Standard D-Bus method, overloaded to insert property tags.

671

"""

672

xmlstring = dbus.service.Object.Introspect(self, object_path,

673

connection)

674

try:

675

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

676

def make_tag(document, name, prop):

677

e = document.createElement("property")

678

e.setAttribute("name", name)

679

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

680

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

681

return e

682

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

683

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

684

for name, prop

685

in self._get_all_dbus_properties()

686

if prop._dbus_interface

687

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

688

if_tag.appendChild(tag)

689

# Add the names to the return values for the

690

# "org.freedesktop.DBus.Properties" methods

691

if (if_tag.getAttribute("name")

692

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

693

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

694

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

695

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

696

if (arg.getAttribute("direction")

697

== "out"):

698

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

699

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

700

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

701

if (arg.getAttribute("direction")

702

== "out"):

703

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

704

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

705

document.unlink()

706

except (AttributeError, xml.dom.DOMException,

707

xml.parsers.expat.ExpatError), error:

708

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

709

error)

710

return xmlstring

711

712

713

class ClientDBus(Client, DBusObjectWithProperties):

481

714

"""A Client class using D-Bus

482

715

483

716

Attributes:

484

717

dbus_object_path: dbus.ObjectPath

485

718

bus: dbus.SystemBus()

486

719

"""

720

721

runtime_expansions = (Client.runtime_expansions

722

+ ("dbus_object_path",))

723

487

724

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

488

725

489

726

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

727

self._approvals_pending = 0

490

728

self.bus = bus

491

729

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

492

730

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

493

731

# the D-Bus

732

client_object_name = unicode(self.name).translate(

733

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

734

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

494

735

self.dbus_object_path = (dbus.ObjectPath

495

(u"/clients/"

496

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

497

dbus.service.Object.__init__(self, self.bus,

498

self.dbus_object_path)

736

("/clients/" + client_object_name))

737

DBusObjectWithProperties.__init__(self, self.bus,

738

self.dbus_object_path)

739

740

def _get_approvals_pending(self):

741

return self._approvals_pending

742

def _set_approvals_pending(self, value):

743

old_value = self._approvals_pending

744

self._approvals_pending = value

745

bval = bool(value)

746

if (hasattr(self, "dbus_object_path")

747

and bval is not bool(old_value)):

748

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

749

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

750

dbus_bool)

751

752

approvals_pending = property(_get_approvals_pending,

753

_set_approvals_pending)

754

del _get_approvals_pending, _set_approvals_pending

499

755

500

756

@staticmethod

501

757

def _datetime_to_dbus(dt, variant_level=0):

504

760

variant_level=variant_level)

505

761

506

762

def enable(self):

507

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

763

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

508

764

r = Client.enable(self)

509

765

if oldstate != self.enabled:

510

766

# Emit D-Bus signals

511

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

767

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

512

768

dbus.Boolean(True, variant_level=1))

513

769

self.PropertyChanged(

514

dbus.String(u"last_enabled"),

770

dbus.String("LastEnabled"),

515

771

self._datetime_to_dbus(self.last_enabled,

516

772

variant_level=1))

517

773

return r

518

774

519

def disable(self, signal = True):

520

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

521

r = Client.disable(self)

522

if signal and oldstate != self.enabled:

775

def disable(self, quiet = False):

776

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

777

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

778

if not quiet and oldstate != self.enabled:

523

779

# Emit D-Bus signal

524

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

780

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

525

781

dbus.Boolean(False, variant_level=1))

526

782

return r

527

783

530

786

self.remove_from_connection()

531

787

except LookupError:

532

788

pass

533

if hasattr(dbus.service.Object, u"__del__"):

534

dbus.service.Object.__del__(self, *args, **kwargs)

789

if hasattr(DBusObjectWithProperties, "__del__"):

790

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

535

791

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

536

792

537

793

def checker_callback(self, pid, condition, command,

539

795

self.checker_callback_tag = None

540

796

self.checker = None

541

797

# Emit D-Bus signal

542

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

798

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

543

799

dbus.Boolean(False, variant_level=1))

544

800

if os.WIFEXITED(condition):

545

801

exitstatus = os.WEXITSTATUS(condition)

560

816

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

561

817

# Emit D-Bus signal

562

818

self.PropertyChanged(

563

dbus.String(u"last_checked_ok"),

819

dbus.String("LastCheckedOK"),

564

820

(self._datetime_to_dbus(self.last_checked_ok,

565

821

variant_level=1)))

566

822

return r

567

823

824

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

825

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

826

# Emit D-Bus signal

827

self.PropertyChanged(

828

dbus.String("LastApprovalRequest"),

829

(self._datetime_to_dbus(self.last_approval_request,

830

variant_level=1)))

831

return r

832

568

833

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

569

834

old_checker = self.checker

570

835

if self.checker is not None:

578

843

# Emit D-Bus signal

579

844

self.CheckerStarted(self.current_checker_command)

580

845

self.PropertyChanged(

581

dbus.String(u"checker_running"),

846

dbus.String("CheckerRunning"),

582

847

dbus.Boolean(True, variant_level=1))

583

848

return r

584

849

585

850

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

586

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

851

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

587

852

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

588

853

if (old_checker is not None

589

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

590

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

854

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

855

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

591

856

dbus.Boolean(False, variant_level=1))

592

857

return r

593

594

## D-Bus methods & signals

595

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

596

597

# CheckedOK - method

598

@dbus.service.method(_interface)

599

def CheckedOK(self):

600

return self.checked_ok()

858

859

def _reset_approved(self):

860

self._approved = None

861

return False

862

863

def approve(self, value=True):

864

self.send_changedstate()

865

self._approved = value

866

gobject.timeout_add(self._timedelta_to_milliseconds

867

(self.approval_duration),

868

self._reset_approved)

869

870

871

## D-Bus methods, signals & properties

872

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

873

874

## Signals

601

875

602

876

# CheckerCompleted - signal

603

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

877

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

604

878

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

605

879

"D-Bus signal"

606

880

pass

607

881

608

882

# CheckerStarted - signal

609

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

883

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

610

884

def CheckerStarted(self, command):

611

885

"D-Bus signal"

612

886

pass

613

887

614

# GetAllProperties - method

615

@dbus.service.method(_interface, out_signature=u"a{sv}")

616

def GetAllProperties(self):

617

"D-Bus method"

618

return dbus.Dictionary({

619

dbus.String(u"name"):

620

dbus.String(self.name, variant_level=1),

621

dbus.String(u"fingerprint"):

622

dbus.String(self.fingerprint, variant_level=1),

623

dbus.String(u"host"):

624

dbus.String(self.host, variant_level=1),

625

dbus.String(u"created"):

626

self._datetime_to_dbus(self.created,

627

variant_level=1),

628

dbus.String(u"last_enabled"):

629

(self._datetime_to_dbus(self.last_enabled,

630

variant_level=1)

631

if self.last_enabled is not None

632

else dbus.Boolean(False, variant_level=1)),

633

dbus.String(u"enabled"):

634

dbus.Boolean(self.enabled, variant_level=1),

635

dbus.String(u"last_checked_ok"):

636

(self._datetime_to_dbus(self.last_checked_ok,

637

variant_level=1)

638

if self.last_checked_ok is not None

639

else dbus.Boolean (False, variant_level=1)),

640

dbus.String(u"timeout"):

641

dbus.UInt64(self.timeout_milliseconds(),

642

variant_level=1),

643

dbus.String(u"interval"):

644

dbus.UInt64(self.interval_milliseconds(),

645

variant_level=1),

646

dbus.String(u"checker"):

647

dbus.String(self.checker_command,

648

variant_level=1),

649

dbus.String(u"checker_running"):

650

dbus.Boolean(self.checker is not None,

651

variant_level=1),

652

dbus.String(u"object_path"):

653

dbus.ObjectPath(self.dbus_object_path,

654

variant_level=1)

655

}, signature=u"sv")

656

657

# IsStillValid - method

658

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

659

def IsStillValid(self):

660

return self.still_valid()

661

662

888

# PropertyChanged - signal

663

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

889

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

664

890

def PropertyChanged(self, property, value):

665

891

"D-Bus signal"

666

892

pass

667

893

668

# ReceivedSecret - signal

894

# GotSecret - signal

669

895

@dbus.service.signal(_interface)

670

def ReceivedSecret(self):

671

"D-Bus signal"

896

def GotSecret(self):

897

"""D-Bus signal

898

Is sent after a successful transfer of secret from the Mandos

899

server to mandos-client

900

"""

672

901

pass

673

902

674

903

# Rejected - signal

675

@dbus.service.signal(_interface)

676

def Rejected(self):

904

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

905

def Rejected(self, reason):

677

906

"D-Bus signal"

678

907

pass

679

908

680

# SetChecker - method

681

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

682

def SetChecker(self, checker):

683

"D-Bus setter method"

684

self.checker_command = checker

685

# Emit D-Bus signal

686

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

687

dbus.String(self.checker_command,

688

variant_level=1))

689

690

# SetHost - method

691

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

692

def SetHost(self, host):

693

"D-Bus setter method"

694

self.host = host

695

# Emit D-Bus signal

696

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

697

dbus.String(self.host, variant_level=1))

698

699

# SetInterval - method

700

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

701

def SetInterval(self, milliseconds):

702

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

703

# Emit D-Bus signal

704

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

705

(dbus.UInt64(self.interval_milliseconds(),

706

variant_level=1)))

707

708

# SetSecret - method

709

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

710

byte_arrays=True)

711

def SetSecret(self, secret):

712

"D-Bus setter method"

713

self.secret = str(secret)

714

715

# SetTimeout - method

716

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

717

def SetTimeout(self, milliseconds):

718

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

719

# Emit D-Bus signal

720

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

721

(dbus.UInt64(self.timeout_milliseconds(),

722

variant_level=1)))

909

# NeedApproval - signal

910

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

911

def NeedApproval(self, timeout, default):

912

"D-Bus signal"

913

return self.need_approval()

914

915

## Methods

916

917

# Approve - method

918

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

919

def Approve(self, value):

920

self.approve(value)

921

922

# CheckedOK - method

923

@dbus.service.method(_interface)

924

def CheckedOK(self):

925

return self.checked_ok()

723

926

724

927

# Enable - method

725

928

@dbus.service.method(_interface)

744

947

def StopChecker(self):

745

948

self.stop_checker()

746

949

950

## Properties

951

952

# ApprovalPending - property

953

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

954

def ApprovalPending_dbus_property(self):

955

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

956

957

# ApprovedByDefault - property

958

@dbus_service_property(_interface, signature="b",

959

access="readwrite")

960

def ApprovedByDefault_dbus_property(self, value=None):

961

if value is None: # get

962

return dbus.Boolean(self.approved_by_default)

963

self.approved_by_default = bool(value)

964

# Emit D-Bus signal

965

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

966

dbus.Boolean(value, variant_level=1))

967

968

# ApprovalDelay - property

969

@dbus_service_property(_interface, signature="t",

970

access="readwrite")

971

def ApprovalDelay_dbus_property(self, value=None):

972

if value is None: # get

973

return dbus.UInt64(self.approval_delay_milliseconds())

974

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

975

# Emit D-Bus signal

976

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

977

dbus.UInt64(value, variant_level=1))

978

979

# ApprovalDuration - property

980

@dbus_service_property(_interface, signature="t",

981

access="readwrite")

982

def ApprovalDuration_dbus_property(self, value=None):

983

if value is None: # get

984

return dbus.UInt64(self._timedelta_to_milliseconds(

985

self.approval_duration))

986

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

987

# Emit D-Bus signal

988

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

989

dbus.UInt64(value, variant_level=1))

990

991

# Name - property

992

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

993

def Name_dbus_property(self):

994

return dbus.String(self.name)

995

996

# Fingerprint - property

997

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

998

def Fingerprint_dbus_property(self):

999

return dbus.String(self.fingerprint)

1000

1001

# Host - property

1002

@dbus_service_property(_interface, signature="s",

1003

access="readwrite")

1004

def Host_dbus_property(self, value=None):

1005

if value is None: # get

1006

return dbus.String(self.host)

1007

self.host = value

1008

# Emit D-Bus signal

1009

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

1010

dbus.String(value, variant_level=1))

1011

1012

# Created - property

1013

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

1014

def Created_dbus_property(self):

1015

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

1016

1017

# LastEnabled - property

1018

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

1019

def LastEnabled_dbus_property(self):

1020

if self.last_enabled is None:

1021

return dbus.String("")

1022

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

1023

1024

# Enabled - property

1025

@dbus_service_property(_interface, signature="b",

1026

access="readwrite")

1027

def Enabled_dbus_property(self, value=None):

1028

if value is None: # get

1029

return dbus.Boolean(self.enabled)

1030

if value:

1031

self.enable()

1032

else:

1033

self.disable()

1034

1035

# LastCheckedOK - property

1036

@dbus_service_property(_interface, signature="s",

1037

access="readwrite")

1038

def LastCheckedOK_dbus_property(self, value=None):

1039

if value is not None:

1040

self.checked_ok()

1041

return

1042

if self.last_checked_ok is None:

1043

return dbus.String("")

1044

return dbus.String(self._datetime_to_dbus(self

1045

.last_checked_ok))

1046

1047

# LastApprovalRequest - property

1048

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

1049

def LastApprovalRequest_dbus_property(self):

1050

if self.last_approval_request is None:

1051

return dbus.String("")

1052

return dbus.String(self.

1053

_datetime_to_dbus(self

1054

.last_approval_request))

1055

1056

# Timeout - property

1057

@dbus_service_property(_interface, signature="t",

1058

access="readwrite")

1059

def Timeout_dbus_property(self, value=None):

1060

if value is None: # get

1061

return dbus.UInt64(self.timeout_milliseconds())

1062

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

1063

# Emit D-Bus signal

1064

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

1065

dbus.UInt64(value, variant_level=1))

1066

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

1067

return

1068

# Reschedule timeout

1069

gobject.source_remove(self.disable_initiator_tag)

1070

self.disable_initiator_tag = None

1071

time_to_die = (self.

1072

_timedelta_to_milliseconds((self

1073

.last_checked_ok

1074

+ self.timeout)

1075

- datetime.datetime

1076

.utcnow()))

1077

if time_to_die <= 0:

1078

# The timeout has passed

1079

self.disable()

1080

else:

1081

self.disable_initiator_tag = (gobject.timeout_add

1082

(time_to_die, self.disable))

1083

1084

# Interval - property

1085

@dbus_service_property(_interface, signature="t",

1086

access="readwrite")

1087

def Interval_dbus_property(self, value=None):

1088

if value is None: # get

1089

return dbus.UInt64(self.interval_milliseconds())

1090

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

1091

# Emit D-Bus signal

1092

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

1093

dbus.UInt64(value, variant_level=1))

1094

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

1095

return

1096

# Reschedule checker run

1097

gobject.source_remove(self.checker_initiator_tag)

1098

self.checker_initiator_tag = (gobject.timeout_add

1099

(value, self.start_checker))

1100

self.start_checker() # Start one now, too

1101

1102

# Checker - property

1103

@dbus_service_property(_interface, signature="s",

1104

access="readwrite")

1105

def Checker_dbus_property(self, value=None):

1106

if value is None: # get

1107

return dbus.String(self.checker_command)

1108

self.checker_command = value

1109

# Emit D-Bus signal

1110

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

1111

dbus.String(self.checker_command,

1112

variant_level=1))

1113

1114

# CheckerRunning - property

1115

@dbus_service_property(_interface, signature="b",

1116

access="readwrite")

1117

def CheckerRunning_dbus_property(self, value=None):

1118

if value is None: # get

1119

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

1120

if value:

1121

self.start_checker()

1122

else:

1123

self.stop_checker()

1124

1125

# ObjectPath - property

1126

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

1127

def ObjectPath_dbus_property(self):

1128

return self.dbus_object_path # is already a dbus.ObjectPath

1129

1130

# Secret = property

1131

@dbus_service_property(_interface, signature="ay",

1132

access="write", byte_arrays=True)

1133

def Secret_dbus_property(self, value):

1134

self.secret = str(value)

1135

747

1136

del _interface

748

1137

749

1138

1139

class ProxyClient(object):

1140

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

1141

self._pipe = child_pipe

1142

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

1143

if not self._pipe.recv():

1144

raise KeyError()

1145

1146

def __getattribute__(self, name):

1147

if(name == '_pipe'):

1148

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

1149

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

1150

data = self._pipe.recv()

1151

if data[0] == 'data':

1152

return data[1]

1153

if data[0] == 'function':

1154

def func(*args, **kwargs):

1155

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

1156

return self._pipe.recv()[1]

1157

return func

1158

1159

def __setattr__(self, name, value):

1160

if(name == '_pipe'):

1161

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

1162

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

1163

1164

750

1165

class ClientHandler(socketserver.BaseRequestHandler, object):

751

1166

"""A class to handle client connections.

752

1167

754

1169

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

755

1170

756

1171

def handle(self):

757

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

758

unicode(self.client_address))

759

logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])

760

# Open IPC pipe to parent process

761

with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:

1172

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

1173

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

1174

unicode(self.client_address))

1175

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

1176

self.server.child_pipe.fileno())

1177

762

1178

session = (gnutls.connection

763

1179

.ClientSession(self.request,

764

1180

gnutls.connection

765

1181

.X509Credentials()))

766

767

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

768

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

769

try:

770

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

771

raise RuntimeError

772

except (ValueError, IndexError, RuntimeError), error:

773

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

774

return

775

1182

776

1183

# Note: gnutls.connection.X509Credentials is really a

777

1184

# generic GnuTLS certificate credentials object so long as

778

1185

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

779

1186

# here despite using OpenPGP certificates.

780

781

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

782

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

783

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

784

# u"+DHE-DSS"))

1187

1188

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

1189

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

1190

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

1191

# "+DHE-DSS"))

785

1192

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

786

1193

priority = self.server.gnutls_priority

787

1194

if priority is None:

788

priority = u"NORMAL"

1195

priority = "NORMAL"

789

1196

(gnutls.library.functions

790

1197

.gnutls_priority_set_direct(session._c_object,

791

1198

priority, None))

792

1199

1200

# Start communication using the Mandos protocol

1201

# Get protocol number

1202

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

1203

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

1204

try:

1205

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

1206

raise RuntimeError

1207

except (ValueError, IndexError, RuntimeError), error:

1208

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

1209

return

1210

1211

# Start GnuTLS connection

793

1212

try:

794

1213

session.handshake()

795

1214

except gnutls.errors.GNUTLSError, error:

796

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

1215

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

797

1216

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

798

1217

# established. Just abandon the request.

799

1218

return

800

logger.debug(u"Handshake succeeded")

1219

logger.debug("Handshake succeeded")

1220

1221

approval_required = False

801

1222

try:

802

fpr = self.fingerprint(self.peer_certificate(session))

803

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

804

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

805

session.bye()

806

return

807

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

1223

try:

1224

fpr = self.fingerprint(self.peer_certificate

1225

(session))

1226

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

1227

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

1228

return

1229

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

1230

1231

try:

1232

client = ProxyClient(child_pipe, fpr,

1233

self.client_address)

1234

except KeyError:

1235

return

1236

1237

if client.approval_delay:

1238

delay = client.approval_delay

1239

client.approvals_pending += 1

1240

approval_required = True

1241

1242

while True:

1243

if not client.enabled:

1244

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

1245

client.name)

1246

if self.server.use_dbus:

1247

# Emit D-Bus signal

1248

client.Rejected("Disabled")

1249

return

1250

1251

if client._approved or not client.approval_delay:

1252

#We are approved or approval is disabled

1253

break

1254

elif client._approved is None:

1255

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

1256

client.name)

1257

if self.server.use_dbus:

1258

# Emit D-Bus signal

1259

client.NeedApproval(

1260

client.approval_delay_milliseconds(),

1261

client.approved_by_default)

1262

else:

1263

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

1264

client.name)

1265

if self.server.use_dbus:

1266

# Emit D-Bus signal

1267

client.Rejected("Denied")

1268

return

1269

1270

#wait until timeout or approved

1271

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

1272

time = datetime.datetime.now()

1273

client.changedstate.acquire()

1274

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

1275

client.changedstate.release()

1276

time2 = datetime.datetime.now()

1277

if (time2 - time) >= delay:

1278

if not client.approved_by_default:

1279

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

1280

" waiting for approval",

1281

client.name)

1282

if self.server.use_dbus:

1283

# Emit D-Bus signal

1284

client.Rejected("Approval timed out")

1285

return

1286

else:

1287

break

1288

else:

1289

delay -= time2 - time

1290

1291

sent_size = 0

1292

while sent_size < len(client.secret):

1293

try:

1294

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

1295

except (gnutls.errors.GNUTLSError), error:

1296

logger.warning("gnutls send failed")

1297

return

1298

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

1299

sent, len(client.secret)

1300

- (sent_size + sent))

1301

sent_size += sent

1302

1303

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

1304

# bump the timeout as if seen

1305

client.checked_ok()

1306

if self.server.use_dbus:

1307

# Emit D-Bus signal

1308

client.GotSecret()

808

1309

809

for c in self.server.clients:

810

if c.fingerprint == fpr:

811

client = c

812

break

813

else:

814

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

815

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

816

session.bye()

817

return

818

# Have to check if client.still_valid(), since it is

819

# possible that the client timed out while establishing

820

# the GnuTLS session.

821

if not client.still_valid():

822

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

823

session.bye()

824

return

825

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

826

sent_size = 0

827

while sent_size < len(client.secret):

828

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

829

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

830

sent, len(client.secret)

831

- (sent_size + sent))

832

sent_size += sent

833

session.bye()

1310

finally:

1311

if approval_required:

1312

client.approvals_pending -= 1

1313

try:

1314

session.bye()

1315

except (gnutls.errors.GNUTLSError), error:

1316

logger.warning("GnuTLS bye failed")

834

1317

835

1318

@staticmethod

836

1319

def peer_certificate(session):

846

1329

.gnutls_certificate_get_peers

847

1330

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

848

1331

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

849

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

850

u" certificate")

1332

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

1333

" certificate")

851

1334

if list_size.value == 0:

852

1335

return None

853

1336

cert = cert_list[0]

879

1362

if crtverify.value != 0:

880

1363

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

881

1364

raise (gnutls.errors.CertificateSecurityError

882

(u"Verify failed"))

1365

("Verify failed"))

883

1366

# New buffer for the fingerprint

884

1367

buf = ctypes.create_string_buffer(20)

885

1368

buf_len = ctypes.c_size_t()

892

1375

# Convert the buffer to a Python bytestring

893

1376

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

894

1377

# Convert the bytestring to hexadecimal notation

895

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

1378

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

896

1379

return hex_fpr

897

1380

898

1381

899

class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):

900

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

1382

class MultiprocessingMixIn(object):

1383

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

1384

def sub_process_main(self, request, address):

1385

try:

1386

self.finish_request(request, address)

1387

except:

1388

self.handle_error(request, address)

1389

self.close_request(request)

1390

1391

def process_request(self, request, address):

1392

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

1393

multiprocessing.Process(target = self.sub_process_main,

1394

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

1395

1396

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1397

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

901

1398

def process_request(self, request, client_address):

902

1399

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

903

1400

904

1401

This function creates a new pipe in self.pipe

905

1402

"""

906

self.pipe = os.pipe()

907

super(ForkingMixInWithPipe,

1403

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1404

1405

super(MultiprocessingMixInWithPipe,

908

1406

self).process_request(request, client_address)

909

os.close(self.pipe[1]) # close write end

910

self.add_pipe(self.pipe[0])

911

def add_pipe(self, pipe):

1407

self.child_pipe.close()

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

912

1411

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

913

os.close(pipe)

914

915

916

class IPv6_TCPServer(ForkingMixInWithPipe,

1412

raise NotImplementedError

1413

1414

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

917

1415

socketserver.TCPServer, object):

918

1416

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

919

1417

935

1433

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

936

1434

if self.interface is not None:

937

1435

if SO_BINDTODEVICE is None:

938

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

939

u" cannot bind to interface %s",

1436

logger.error("SO_BINDTODEVICE does not exist;"

1437

" cannot bind to interface %s",

940

1438

self.interface)

941

1439

else:

942

1440

try:

943

1441

self.socket.setsockopt(socket.SOL_SOCKET,

944

1442

SO_BINDTODEVICE,

945

1443

str(self.interface

946

+ u'\0'))

1444

+ '\0'))

947

1445

except socket.error, error:

948

1446

if error[0] == errno.EPERM:

949

logger.error(u"No permission to"

950

u" bind to interface %s",

1447

logger.error("No permission to"

1448

" bind to interface %s",

951

1449

self.interface)

952

1450

elif error[0] == errno.ENOPROTOOPT:

953

logger.error(u"SO_BINDTODEVICE not available;"

954

u" cannot bind to interface %s",

1451

logger.error("SO_BINDTODEVICE not available;"

1452

" cannot bind to interface %s",

955

1453

self.interface)

956

1454

else:

957

1455

raise

959

1457

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

960

1458

if not self.server_address[0]:

961

1459

if self.address_family == socket.AF_INET6:

962

any_address = u"::" # in6addr_any

1460

any_address = "::" # in6addr_any

963

1461

else:

964

1462

any_address = socket.INADDR_ANY

965

1463

self.server_address = (any_address,

983

1481

clients: set of Client objects

984

1482

gnutls_priority GnuTLS priority string

985

1483

use_dbus: Boolean; to emit D-Bus signals or not

986

clients: set of Client objects

987

gnutls_priority GnuTLS priority string

988

use_dbus: Boolean; to emit D-Bus signals or not

989

1484

990

1485

Assumes a gobject.MainLoop event loop.

991

1486

"""

1007

1502

return socketserver.TCPServer.server_activate(self)

1008

1503

def enable(self):

1009

1504

self.enabled = True

1010

def add_pipe(self, pipe):

1505

def add_pipe(self, parent_pipe):

1011

1506

# Call "handle_ipc" for both data and EOF events

1012

gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,

1013

self.handle_ipc)

1014

def handle_ipc(self, source, condition, file_objects={}):

1507

gobject.io_add_watch(parent_pipe.fileno(),

1508

gobject.IO_IN | gobject.IO_HUP,

1509

functools.partial(self.handle_ipc,

1510

parent_pipe = parent_pipe))

1511

1512

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

1513

client_object=None):

1015

1514

condition_names = {

1016

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

1017

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

1515

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

1516

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

1018

1517

# blocking).

1019

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

1020

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

1021

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

1518

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

1519

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

1520

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

1022

1521

# broken, usually for pipes and

1023

1522

# sockets).

1024

1523

}

1026

1525

for cond, name in

1027

1526

condition_names.iteritems()

1028

1527

if cond & condition)

1029

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

1030

conditions_string)

1031

1032

# Turn the pipe file descriptor into a Python file object

1033

if source not in file_objects:

1034

file_objects[source] = os.fdopen(source, u"r", 1)

1035

1036

# Read a line from the file object

1037

cmdline = file_objects[source].readline()

1038

if not cmdline: # Empty line means end of file

1039

# close the IPC pipe

1040

file_objects[source].close()

1041

del file_objects[source]

1042

1043

# Stop calling this function

1044

return False

1045

1046

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

1047

1048

# Parse and act on command

1049

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

1050

1051

if cmd == u"NOTFOUND":

1052

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

1053

args)

1054

if self.use_dbus:

1055

# Emit D-Bus signal

1056

mandos_dbus_service.ClientNotFound(args)

1057

elif cmd == u"INVALID":

1058

for client in self.clients:

1059

if client.name == args:

1060

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

1061

if self.use_dbus:

1062

# Emit D-Bus signal

1063

client.Rejected()

1064

break

1065

else:

1066

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

1067

elif cmd == u"SENDING":

1068

for client in self.clients:

1069

if client.name == args:

1070

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

1071

client.checked_ok()

1072

if self.use_dbus:

1073

# Emit D-Bus signal

1074

client.ReceivedSecret()

1075

break

1076

else:

1077

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

1078

args)

1079

else:

1080

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

1081

1082

# Keep calling this function

1528

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

1529

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

1530

return False

1531

1532

# Read a request from the child

1533

request = parent_pipe.recv()

1534

command = request[0]

1535

1536

if command == 'init':

1537

fpr = request[1]

1538

address = request[2]

1539

1540

for c in self.clients:

1541

if c.fingerprint == fpr:

1542

client = c

1543

break

1544

else:

1545

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

1546

"dress: %s", fpr, address)

1547

if self.use_dbus:

1548

# Emit D-Bus signal

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

1550

parent_pipe.send(False)

1551

return False

1552

1553

gobject.io_add_watch(parent_pipe.fileno(),

1554

gobject.IO_IN | gobject.IO_HUP,

1555

functools.partial(self.handle_ipc,

1556

parent_pipe = parent_pipe,

1557

client_object = client))

1558

parent_pipe.send(True)

1559

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

1560

return False

1561

if command == 'funcall':

1562

funcname = request[1]

1563

args = request[2]

1564

kwargs = request[3]

1565

1566

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

1567

1568

if command == 'getattr':

1569

attrname = request[1]

1570

if callable(client_object.__getattribute__(attrname)):

1571

parent_pipe.send(('function',))

1572

else:

1573

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

1574

1575

if command == 'setattr':

1576

attrname = request[1]

1577

value = request[2]

1578

setattr(client_object, attrname, value)

1579

1083

1580

return True

1084

1581

1085

1582

1086

1583

def string_to_delta(interval):

1087

1584

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

1088

1585

1089

>>> string_to_delta(u'7d')

1586

>>> string_to_delta('7d')

1090

1587

datetime.timedelta(7)

1091

>>> string_to_delta(u'60s')

1588

>>> string_to_delta('60s')

1092

1589

datetime.timedelta(0, 60)

1093

>>> string_to_delta(u'60m')

1590

>>> string_to_delta('60m')

1094

1591

datetime.timedelta(0, 3600)

1095

>>> string_to_delta(u'24h')

1592

>>> string_to_delta('24h')

1096

1593

datetime.timedelta(1)

1097

>>> string_to_delta(u'1w')

1594

>>> string_to_delta('1w')

1098

1595

datetime.timedelta(7)

1099

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

1596

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

1100

1597

datetime.timedelta(0, 330)

1101

1598

"""

1102

1599

timevalue = datetime.timedelta(0)

1104

1601

try:

1105

1602

suffix = unicode(s[-1])

1106

1603

value = int(s[:-1])

1107

if suffix == u"d":

1604

if suffix == "d":

1108

1605

delta = datetime.timedelta(value)

1109

elif suffix == u"s":

1606

elif suffix == "s":

1110

1607

delta = datetime.timedelta(0, value)

1111

elif suffix == u"m":

1608

elif suffix == "m":

1112

1609

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

1113

elif suffix == u"h":

1610

elif suffix == "h":

1114

1611

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

1115

elif suffix == u"w":

1612

elif suffix == "w":

1116

1613

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

1117

1614

else:

1118

raise ValueError

1119

except (ValueError, IndexError):

1120

raise ValueError

1615

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

1616

except (ValueError, IndexError), e:

1617

raise ValueError(*(e.args))

1121

1618

timevalue += delta

1122

1619

return timevalue

1123

1620

1129

1626

global if_nametoindex

1130

1627

try:

1131

1628

if_nametoindex = (ctypes.cdll.LoadLibrary

1132

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

1629

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

1133

1630

.if_nametoindex)

1134

1631

except (OSError, AttributeError):

1135

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

1632

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

1136

1633

def if_nametoindex(interface):

1137

1634

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

1138

1635

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

1139

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

1636

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

1140

1637

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1141

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

1638

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

1142

1639

interface))

1143

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

1640

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

1144

1641

ifreq[16:20])[0]

1145

1642

return interface_index

1146

1643

return if_nametoindex(interface)

1154

1651

sys.exit()

1155

1652

os.setsid()

1156

1653

if not nochdir:

1157

os.chdir(u"/")

1654

os.chdir("/")

1158

1655

if os.fork():

1159

1656

sys.exit()

1160

1657

if not noclose:

1162

1659

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

1163

1660

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

1164

1661

raise OSError(errno.ENODEV,

1165

u"/dev/null not a character device")

1662

"%s not a character device"

1663

% os.path.devnull)

1166

1664

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

1167

1665

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

1168

1666

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

1172

1670

1173

1671

def main():

1174

1672

1175

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

1673

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

1176

1674

# Parsing of options, both command line and config file

1177

1675

1178

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

1179

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

1180

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

1181

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

1182

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

1183

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

1184

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

1185

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

1186

help=u"Run self-test")

1187

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

1188

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

1189

u" terminal")

1190

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

1191

u" priority string (see GnuTLS documentation)")

1192

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

1193

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

1194

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

1195

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

1196

help=u"Directory to search for configuration"

1197

u" files")

1198

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

1199

dest=u"use_dbus",

1200

help=optparse.SUPPRESS_HELP) # XXX: Not done yet

1201

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

1202

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

1203

options = parser.parse_args()[0]

1676

parser = argparse.ArgumentParser()

1677

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

1678

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

1679

help="show version number and exit")

1680

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

1681

help="Bind to interface IF")

1682

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

1683

help="Address to listen for requests on")

1684

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

1685

help="Port number to receive requests on")

1686

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

1687

help="Run self-test")

1688

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

1689

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

1690

" to terminal")

1691

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

1692

help="Debug level for stdout output")

1693

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

1694

" priority string (see GnuTLS documentation)")

1695

parser.add_argument("--servicename",

1696

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

1697

parser.add_argument("--configdir",

1698

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

1699

help="Directory to search for configuration"

1700

" files")

1701

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

1702

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

1703

" system bus interface")

1704

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

1705

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

1706

options = parser.parse_args()

1204

1707

1205

1708

if options.check:

1206

1709

import doctest

1208

1711

sys.exit()

1209

1712

1210

1713

# Default values for config file for server-global settings

1211

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

1212

u"address": u"",

1213

u"port": u"",

1214

u"debug": u"False",

1215

u"priority":

1216

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

1217

u"servicename": u"Mandos",

1218

u"use_dbus": u"True",

1219

u"use_ipv6": u"True",

1714

server_defaults = { "interface": "",

1715

"address": "",

1716

"port": "",

1717

"debug": "False",

1718

"priority":

1719

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

1720

"servicename": "Mandos",

1721

"use_dbus": "True",

1722

"use_ipv6": "True",

1723

"debuglevel": "",

1220

1724

}

1221

1725

1222

1726

# Parse config file for server-global settings

1223

1727

server_config = configparser.SafeConfigParser(server_defaults)

1224

1728

del server_defaults

1225

1729

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

1226

u"mandos.conf"))

1730

"mandos.conf"))

1227

1731

# Convert the SafeConfigParser object to a dict

1228

1732

server_settings = server_config.defaults()

1229

1733

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

1230

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

1231

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

1734

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

1735

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

1232

1736

option)

1233

1737

if server_settings["port"]:

1234

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

1235

u"port")

1738

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

1739

"port")

1236

1740

del server_config

1237

1741

1238

1742

# Override the settings from the config file with command line

1239

1743

# options, if set.

1240

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

1241

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

1242

u"use_dbus", u"use_ipv6"):

1744

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

1745

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

1746

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

1243

1747

value = getattr(options, option)

1244

1748

if value is not None:

1245

1749

server_settings[option] = value

1253

1757

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

1254

1758

1255

1759

# For convenience

1256

debug = server_settings[u"debug"]

1257

use_dbus = server_settings[u"use_dbus"]

1258

use_dbus = False # XXX: Not done yet

1259

use_ipv6 = server_settings[u"use_ipv6"]

1260

1261

if not debug:

1262

syslogger.setLevel(logging.WARNING)

1263

console.setLevel(logging.WARNING)

1264

1265

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

1760

debug = server_settings["debug"]

1761

debuglevel = server_settings["debuglevel"]

1762

use_dbus = server_settings["use_dbus"]

1763

use_ipv6 = server_settings["use_ipv6"]

1764

1765

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

1266

1766

syslogger.setFormatter(logging.Formatter

1267

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

1268

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

1269

% server_settings[u"servicename"]))

1767

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

1768

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

1769

% server_settings["servicename"]))

1270

1770

1271

1771

# Parse config file with clients

1272

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

1273

u"interval": u"5m",

1274

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

1275

u"host": u"",

1772

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

1773

"interval": "5m",

1774

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

1775

"host": "",

1776

"approval_delay": "0s",

1777

"approval_duration": "1s",

1276

1778

}

1277

1779

client_config = configparser.SafeConfigParser(client_defaults)

1278

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

1279

u"clients.conf"))

1780

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

1781

"clients.conf"))

1280

1782

1281

1783

global mandos_dbus_service

1282

1784

mandos_dbus_service = None

1283

1785

1284

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

1285

server_settings[u"port"]),

1786

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

1787

server_settings["port"]),

1286

1788

ClientHandler,

1287

interface=server_settings[u"interface"],

1789

interface=(server_settings["interface"]

1790

or None),

1288

1791

use_ipv6=use_ipv6,

1289

1792

gnutls_priority=

1290

server_settings[u"priority"],

1793

server_settings["priority"],

1291

1794

use_dbus=use_dbus)

1292

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

1293

try:

1294

pidfile = open(pidfilename, u"w")

1295

except IOError:

1296

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

1795

if not debug:

1796

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

1797

try:

1798

pidfile = open(pidfilename, "w")

1799

except IOError:

1800

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

1297

1801

1298

1802

try:

1299

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

1300

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

1803

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

1804

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

1301

1805

except KeyError:

1302

1806

try:

1303

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

1304

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

1807

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

1808

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

1305

1809

except KeyError:

1306

1810

try:

1307

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

1308

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

1811

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

1812

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

1309

1813

except KeyError:

1310

1814

uid = 65534

1311

1815

gid = 65534

1316

1820

if error[0] != errno.EPERM:

1317

1821

raise error

1318

1822

1319

# Enable all possible GnuTLS debugging

1823

if not debug and not debuglevel:

1824

syslogger.setLevel(logging.WARNING)

1825

console.setLevel(logging.WARNING)

1826

if debuglevel:

1827

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

1828

syslogger.setLevel(level)

1829

console.setLevel(level)

1830

1320

1831

if debug:

1832

# Enable all possible GnuTLS debugging

1833

1321

1834

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

1322

1835

# - GnuTLS manual

1323

1836

gnutls.library.functions.gnutls_global_set_log_level(11)

1324

1837

1325

1838

@gnutls.library.types.gnutls_log_func

1326

1839

def debug_gnutls(level, string):

1327

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

1840

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

1328

1841

1329

1842

(gnutls.library.functions

1330

1843

.gnutls_global_set_log_function(debug_gnutls))

1844

1845

# Redirect stdin so all checkers get /dev/null

1846

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

1847

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

1848

if null > 2:

1849

os.close(null)

1850

else:

1851

# No console logging

1852

logger.removeHandler(console)

1853

1854

# Need to fork before connecting to D-Bus

1855

if not debug:

1856

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

1857

daemon()

1331

1858

1332

1859

global main_loop

1333

1860

# From the Avahi example code

1336

1863

bus = dbus.SystemBus()

1337

1864

# End of Avahi example code

1338

1865

if use_dbus:

1339

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

1866

try:

1867

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

1868

bus, do_not_queue=True)

1869

except dbus.exceptions.NameExistsException, e:

1870

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

1871

use_dbus = False

1872

server_settings["use_dbus"] = False

1873

tcp_server.use_dbus = False

1340

1874

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1341

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

1342

servicetype = u"_mandos._tcp",

1875

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

1876

servicetype = "_mandos._tcp",

1343

1877

protocol = protocol, bus = bus)

1344

1878

if server_settings["interface"]:

1345

1879

service.interface = (if_nametoindex

1346

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

1880

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

1881

1882

global multiprocessing_manager

1883

multiprocessing_manager = multiprocessing.Manager()

1347

1884

1348

1885

client_class = Client

1349

1886

if use_dbus:

1350

1887

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

1888

def client_config_items(config, section):

1889

special_settings = {

1890

"approved_by_default":

1891

lambda: config.getboolean(section,

1892

"approved_by_default"),

1893

}

1894

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

1895

try:

1896

yield (name, special_settings[name]())

1897

except KeyError:

1898

yield (name, value)

1899

1351

1900

tcp_server.clients.update(set(

1352

1901

client_class(name = section,

1353

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

1902

config= dict(client_config_items(

1903

client_config, section)))

1354

1904

for section in client_config.sections()))

1355

1905

if not tcp_server.clients:

1356

logger.warning(u"No clients defined")

1357

1358

if debug:

1359

# Redirect stdin so all checkers get /dev/null

1360

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

1361

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

1362

if null > 2:

1363

os.close(null)

1364

else:

1365

# No console logging

1366

logger.removeHandler(console)

1367

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

1368

daemon()

1369

1370

try:

1371

with closing(pidfile):

1372

pid = os.getpid()

1373

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

1374

del pidfile

1375

except IOError:

1376

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

1377

pidfilename, pid)

1378

except NameError:

1379

# "pidfile" was never created

1380

pass

1381

del pidfilename

1382

1383

def cleanup():

1384

"Cleanup function; run on exit"

1385

service.cleanup()

1906

logger.warning("No clients defined")

1386

1907

1387

while tcp_server.clients:

1388

client = tcp_server.clients.pop()

1389

client.disable_hook = None

1390

client.disable()

1391

1392

atexit.register(cleanup)

1393

1394

1908

if not debug:

1909

try:

1910

with pidfile:

1911

pid = os.getpid()

1912

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

1913

del pidfile

1914

except IOError:

1915

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

1916

pidfilename, pid)

1917

except NameError:

1918

# "pidfile" was never created

1919

pass

1920

del pidfilename

1921

1395

1922

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

1923

1396

1924

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

1397

1925

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

1398

1926

1400

1928

class MandosDBusService(dbus.service.Object):

1401

1929

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

1402

1930

def __init__(self):

1403

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

1404

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

1405

1406

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

1407

def ClientAdded(self, objpath, properties):

1408

"D-Bus signal"

1409

pass

1410

1411

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

1412

def ClientNotFound(self, fingerprint):

1413

"D-Bus signal"

1414

pass

1415

1416

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

1931

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

1932

_interface = "se.bsnet.fukt.Mandos"

1933

1934

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

1935

def ClientAdded(self, objpath):

1936

"D-Bus signal"

1937

pass

1938

1939

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

1940

def ClientNotFound(self, fingerprint, address):

1941

"D-Bus signal"

1942

pass

1943

1944

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

1417

1945

def ClientRemoved(self, objpath, name):

1418

1946

"D-Bus signal"

1419

1947

pass

1420

1948

1421

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

1949

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

1422

1950

def GetAllClients(self):

1423

1951

"D-Bus method"

1424

1952

return dbus.Array(c.dbus_object_path

1425

1953

for c in tcp_server.clients)

1426

1954

1427

1955

@dbus.service.method(_interface,

1428

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

1956

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

1429

1957

def GetAllClientsWithProperties(self):

1430

1958

"D-Bus method"

1431

1959

return dbus.Dictionary(

1432

((c.dbus_object_path, c.GetAllProperties())

1960

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

1433

1961

for c in tcp_server.clients),

1434

signature=u"oa{sv}")

1962

signature="oa{sv}")

1435

1963

1436

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

1964

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

1437

1965

def RemoveClient(self, object_path):

1438

1966

"D-Bus method"

1439

1967

for c in tcp_server.clients:

1441

1969

tcp_server.clients.remove(c)

1442

1970

c.remove_from_connection()

1443

1971

# Don't signal anything except ClientRemoved

1444

c.disable(signal=False)

1972

c.disable(quiet=True)

1445

1973

# Emit D-Bus signal

1446

1974

self.ClientRemoved(object_path, c.name)

1447

1975

return

1448

raise KeyError

1976

raise KeyError(object_path)

1449

1977

1450

1978

del _interface

1451

1979

1452

1980

mandos_dbus_service = MandosDBusService()

1453

1981

1982

def cleanup():

1983

"Cleanup function; run on exit"

1984

service.cleanup()

1985

1986

while tcp_server.clients:

1987

client = tcp_server.clients.pop()

1988

if use_dbus:

1989

client.remove_from_connection()

1990

client.disable_hook = None

1991

# Don't signal anything except ClientRemoved

1992

client.disable(quiet=True)

1993

if use_dbus:

1994

# Emit D-Bus signal

1995

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

1996

client.name)

1997

1998

atexit.register(cleanup)

1999

1454

2000

for client in tcp_server.clients:

1455

2001

if use_dbus:

1456

2002

# Emit D-Bus signal

1457

mandos_dbus_service.ClientAdded(client.dbus_object_path,

1458

client.GetAllProperties())

2003

mandos_dbus_service.ClientAdded(client.dbus_object_path)

1459

2004

client.enable()

1460

2005

1461

2006

tcp_server.enable()

1464

2009

# Find out what port we got

1465

2010

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

1466

2011

if use_ipv6:

1467

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

2012

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

1468

2013

" flowinfo %d, scope_id %d"

1469

2014

% tcp_server.socket.getsockname())

1470

2015

else: # IPv4

1471

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

2016

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

1472

2017

% tcp_server.socket.getsockname())

1473

2018

1474

2019

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

1478

2023

try:

1479

2024

service.activate()

1480

2025

except dbus.exceptions.DBusException, error:

1481

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

2026

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

2027

cleanup()

1482

2028

sys.exit(1)

1483

2029

# End of Avahi example code

1484

2030

1487

2033

(tcp_server.handle_request

1488

2034

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

1489

2035

1490

logger.debug(u"Starting main loop")

2036

logger.debug("Starting main loop")

1491

2037

main_loop.run()

1492

2038

except AvahiError, error:

1493

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

2039

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

2040

cleanup()

1494

2041

sys.exit(1)

1495

2042

except KeyboardInterrupt:

1496

2043

if debug:

1497

print >> sys.stderr

1498

logger.debug(u"Server received KeyboardInterrupt")

1499

logger.debug(u"Server exiting")

2044

print("", file=sys.stderr)

2045

logger.debug("Server received KeyboardInterrupt")

2046

logger.debug("Server exiting")

2047

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

2048

cleanup()

1500

2049

1501

2050

if __name__ == '__main__':

1502

2051

main()