/mandos/trunk : revision 24.1.142

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

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#

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# Everything else is

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#

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

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from __future__ import division, with_statement, absolute_import

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import SocketServer as socketserver

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import socket

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import argparse

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import optparse

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import datetime

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import errno

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import gnutls.crypto

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import logging

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import logging.handlers

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import pwd

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import contextlib

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from contextlib import closing

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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 = "1.3.0"

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version = "1.0.12"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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logger = logging.Logger(u'mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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

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u' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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

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u' %(levelname)s:'

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u' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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Attributes:

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

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Used to optionally bind to the specified interface.

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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"""

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

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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

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u" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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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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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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syslogger.setFormatter(logging.Formatter

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

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

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException, 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.add()

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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.group.connect_to_signal('StateChanged',

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

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self.name, self.type)

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self.group.AddService(

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self.interface,

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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logger.debug("Zeroconf service established.")

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

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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raise AvahiGroupError(u"State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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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("Zeroconf server name collision")

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

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self.remove()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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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("StateChanged",

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self.server.connect_to_signal(u"StateChanged",

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self.server_state_changed)

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

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

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Attributes:

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

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

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

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D-Bus identifiers

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

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uniquely identify the client

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

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host: string; available for use by the checker command

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

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last_enabled: datetime.datetime(); (UTC)

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enabled: bool()

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

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

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until this client is 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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checker: subprocess.Popen(); a running checker process used

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to see if the client lives.

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'None' if no process is running.

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checker_callback_tag: a gobject event source tag, or None

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checker_command: string; External command which is run to check

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if client lives. %() expansions are done at

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checker_initiator_tag: a gobject event source tag, or None

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disable_initiator_tag: - '' -

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checker_callback_tag: - '' -

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

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client lives. %() expansions are done at

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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uniquely identify the client

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host: string; available for use by the checker command

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

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

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

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last_enabled: datetime.datetime(); (UTC)

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D-Bus identifiers

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

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

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until this client is disabled

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runtime_expansions: Allowed attributes for runtime expansion.

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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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 _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 timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.timeout)

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return self._datetime_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._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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return self._datetime_to_milliseconds(self.interval)

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

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

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

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.replace(" ", ""))

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

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if "secret" in config:

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

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elif "secfile" in config:

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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.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.secret = secfile.read()

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else:

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

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

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% self.name)

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

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

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self.created = datetime.datetime.utcnow()

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self.enabled = False

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self.last_approval_request = None

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self.last_enabled = None

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self.last_checked_ok = None

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

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

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

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

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self.disable_hook = disable_hook

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

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self.checker_callback_tag = None

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self.checker_command = config["checker"]

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self.checker_command = config[u"checker"]

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self.current_checker_command = None

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self.last_connect = None

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self._approved = None

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

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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, "enabled", False):

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

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# Already enabled

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return

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self.send_changedstate()

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self.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, quiet=True):

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def disable(self):

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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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if not quiet:

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self.send_changedstate()

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if not quiet:

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

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

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

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

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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

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

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = None

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self.stop_checker()

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if os.WIFEXITED(condition):

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exitstatus = os.WEXITSTATUS(condition)

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if exitstatus == 0:

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

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

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vars(self))

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self.checked_ok()

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else:

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

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

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vars(self))

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else:

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

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

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vars(self))

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def checked_ok(self):

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(self.timeout_milliseconds(),

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self.disable))

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def need_approval(self):

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self.last_approval_request = datetime.datetime.utcnow()

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def start_checker(self):

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

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# 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 disabled, which is as it

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# should be.

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

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try:

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if self.checker is not None:

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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("Checker was a zombie")

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

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback(pid, status,

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self.current_checker_command)

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command = self.checker_command % self.host

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except TypeError:

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# Escape attributes for the shell

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escaped_attrs = dict(

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(attr,

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

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errors=

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'replace')))

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for attr in

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self.runtime_expansions)

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escaped_attrs = dict((key,

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re.escape(unicode(str(val),

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errors=

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u'replace')))

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for key, val in

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vars(self).iteritems())

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try:

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command = self.checker_command % escaped_attrs

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421

except TypeError, error:

476

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

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' %s', self.checker_command, error)

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

423

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

478

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return True # Try again later

479

425

self.current_checker_command = command

480

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try:

481

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

427

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

482

428

command, self.name)

483

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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(),

486

432

# always replaced by /dev/null.)

487

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self.checker = subprocess.Popen(command,

488

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close_fds=True,

489

shell=True, cwd="/")

435

shell=True, cwd=u"/")

490

436

self.checker_callback_tag = (gobject.child_watch_add

491

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(self.checker.pid,

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self.checker_callback,

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444

gobject.source_remove(self.checker_callback_tag)

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445

self.checker_callback(pid, status, command)

500

446

except OSError, error:

501

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

447

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

502

448

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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454

if self.checker_callback_tag:

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455

gobject.source_remove(self.checker_callback_tag)

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456

self.checker_callback_tag = None

511

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

457

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

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458

return

513

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

459

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

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460

try:

515

461

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

516

#time.sleep(0.5)

462

#os.sleep(0.5)

517

463

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

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

519

465

except OSError, error:

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466

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

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raise

522

468

self.checker = None

523

524

def dbus_service_property(dbus_interface, signature="v",

525

access="readwrite", byte_arrays=False):

526

"""Decorators for marking methods of a DBusObjectWithProperties to

527

become properties on the D-Bus.

528

529

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

530

and with one argument by "Set".

531

532

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

533

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

534

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

535

"""

536

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

537

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

538

if byte_arrays and signature != "ay":

539

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

540

" signature %r" % signature)

541

def decorator(func):

542

func._dbus_is_property = True

543

func._dbus_interface = dbus_interface

544

func._dbus_signature = signature

545

func._dbus_access = access

546

func._dbus_name = func.__name__

547

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

548

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

549

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

550

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):

469

470

def still_valid(self):

471

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

472

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

473

return False

474

now = datetime.datetime.utcnow()

475

if self.last_checked_ok is None:

476

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

477

else:

478

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

479

480

481

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

714

482

"""A Client class using D-Bus

715

483

716

484

Attributes:

717

485

dbus_object_path: dbus.ObjectPath

718

486

bus: dbus.SystemBus()

719

487

"""

720

721

runtime_expansions = (Client.runtime_expansions

722

+ ("dbus_object_path",))

723

724

488

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

725

489

726

490

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

727

self._approvals_pending = 0

728

491

self.bus = bus

729

492

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

730

493

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

731

494

# the D-Bus

732

client_object_name = unicode(self.name).translate(

733

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

734

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

735

495

self.dbus_object_path = (dbus.ObjectPath

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

496

(u"/clients/"

497

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

498

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

499

self.dbus_object_path)

755

500

756

501

@staticmethod

757

502

def _datetime_to_dbus(dt, variant_level=0):

760

505

variant_level=variant_level)

761

506

762

507

def enable(self):

763

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

508

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

764

509

r = Client.enable(self)

765

510

if oldstate != self.enabled:

766

511

# Emit D-Bus signals

767

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

512

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

768

513

dbus.Boolean(True, variant_level=1))

769

514

self.PropertyChanged(

770

dbus.String("LastEnabled"),

515

dbus.String(u"last_enabled"),

771

516

self._datetime_to_dbus(self.last_enabled,

772

517

variant_level=1))

773

518

return r

774

519

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:

520

def disable(self, signal = True):

521

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

522

r = Client.disable(self)

523

if signal and oldstate != self.enabled:

779

524

# Emit D-Bus signal

780

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

525

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

781

526

dbus.Boolean(False, variant_level=1))

782

527

return r

783

528

786

531

self.remove_from_connection()

787

532

except LookupError:

788

533

pass

789

if hasattr(DBusObjectWithProperties, "__del__"):

790

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

534

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

535

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

791

536

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

792

537

793

538

def checker_callback(self, pid, condition, command,

795

540

self.checker_callback_tag = None

796

541

self.checker = None

797

542

# Emit D-Bus signal

798

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

543

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

799

544

dbus.Boolean(False, variant_level=1))

800

545

if os.WIFEXITED(condition):

801

546

exitstatus = os.WEXITSTATUS(condition)

816

561

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

817

562

# Emit D-Bus signal

818

563

self.PropertyChanged(

819

dbus.String("LastCheckedOK"),

564

dbus.String(u"last_checked_ok"),

820

565

(self._datetime_to_dbus(self.last_checked_ok,

821

566

variant_level=1)))

822

567

return r

823

568

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

833

569

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

834

570

old_checker = self.checker

835

571

if self.checker is not None:

843

579

# Emit D-Bus signal

844

580

self.CheckerStarted(self.current_checker_command)

845

581

self.PropertyChanged(

846

dbus.String("CheckerRunning"),

582

dbus.String(u"checker_running"),

847

583

dbus.Boolean(True, variant_level=1))

848

584

return r

849

585

850

586

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

851

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

587

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

852

588

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

853

589

if (old_checker is not None

854

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

855

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

590

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

591

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

856

592

dbus.Boolean(False, variant_level=1))

857

593

return r

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

594

595

## D-Bus methods & signals

596

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

597

598

# CheckedOK - method

599

@dbus.service.method(_interface)

600

def CheckedOK(self):

601

return self.checked_ok()

875

602

876

603

# CheckerCompleted - signal

877

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

604

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

878

605

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

879

606

"D-Bus signal"

880

607

pass

881

608

882

609

# CheckerStarted - signal

883

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

610

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

884

611

def CheckerStarted(self, command):

885

612

"D-Bus signal"

886

613

pass

887

614

615

# GetAllProperties - method

616

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

617

def GetAllProperties(self):

618

"D-Bus method"

619

return dbus.Dictionary({

620

dbus.String(u"name"):

621

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

622

dbus.String(u"fingerprint"):

623

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

624

dbus.String(u"host"):

625

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

626

dbus.String(u"created"):

627

self._datetime_to_dbus(self.created,

628

variant_level=1),

629

dbus.String(u"last_enabled"):

630

(self._datetime_to_dbus(self.last_enabled,

631

variant_level=1)

632

if self.last_enabled is not None

633

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

634

dbus.String(u"enabled"):

635

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

636

dbus.String(u"last_checked_ok"):

637

(self._datetime_to_dbus(self.last_checked_ok,

638

variant_level=1)

639

if self.last_checked_ok is not None

640

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

641

dbus.String(u"timeout"):

642

dbus.UInt64(self.timeout_milliseconds(),

643

variant_level=1),

644

dbus.String(u"interval"):

645

dbus.UInt64(self.interval_milliseconds(),

646

variant_level=1),

647

dbus.String(u"checker"):

648

dbus.String(self.checker_command,

649

variant_level=1),

650

dbus.String(u"checker_running"):

651

dbus.Boolean(self.checker is not None,

652

variant_level=1),

653

dbus.String(u"object_path"):

654

dbus.ObjectPath(self.dbus_object_path,

655

variant_level=1)

656

}, signature=u"sv")

657

658

# IsStillValid - method

659

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

660

def IsStillValid(self):

661

return self.still_valid()

662

888

663

# PropertyChanged - signal

889

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

664

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

890

665

def PropertyChanged(self, property, value):

891

666

"D-Bus signal"

892

667

pass

893

668

894

# GotSecret - signal

669

# ReceivedSecret - signal

895

670

@dbus.service.signal(_interface)

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

"""

671

def ReceivedSecret(self):

672

"D-Bus signal"

901

673

pass

902

674

903

675

# Rejected - signal

904

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

905

def Rejected(self, reason):

676

@dbus.service.signal(_interface)

677

def Rejected(self):

906

678

"D-Bus signal"

907

679

pass

908

680

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()

681

# SetChecker - method

682

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

683

def SetChecker(self, checker):

684

"D-Bus setter method"

685

self.checker_command = checker

686

# Emit D-Bus signal

687

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

688

dbus.String(self.checker_command,

689

variant_level=1))

690

691

# SetHost - method

692

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

693

def SetHost(self, host):

694

"D-Bus setter method"

695

self.host = host

696

# Emit D-Bus signal

697

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

698

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

699

700

# SetInterval - method

701

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

702

def SetInterval(self, milliseconds):

703

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

704

# Emit D-Bus signal

705

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

706

(dbus.UInt64(self

707

.interval_milliseconds(),

708

variant_level=1)))

709

710

# SetSecret - method

711

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

712

byte_arrays=True)

713

def SetSecret(self, secret):

714

"D-Bus setter method"

715

self.secret = str(secret)

716

717

# SetTimeout - method

718

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

719

def SetTimeout(self, milliseconds):

720

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

721

# Emit D-Bus signal

722

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

723

(dbus.UInt64(self.timeout_milliseconds(),

724

variant_level=1)))

926

725

927

726

# Enable - method

928

727

@dbus.service.method(_interface)

947

746

def StopChecker(self):

948

747

self.stop_checker()

949

748

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

1136

749

del _interface

1137

750

1138

751

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

1165

752

class ClientHandler(socketserver.BaseRequestHandler, object):

1166

753

"""A class to handle client connections.

1167

754

1169

756

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

1170

757

1171

758

def handle(self):

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

759

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

760

unicode(self.client_address))

761

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

762

# Open IPC pipe to parent process

763

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

1178

764

session = (gnutls.connection

1179

765

.ClientSession(self.request,

1180

766

gnutls.connection

1181

767

.X509Credentials()))

1182

768

769

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

770

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

771

try:

772

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

773

raise RuntimeError

774

except (ValueError, IndexError, RuntimeError), error:

775

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

776

return

777

1183

778

# Note: gnutls.connection.X509Credentials is really a

1184

779

# generic GnuTLS certificate credentials object so long as

1185

780

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

1186

781

# here despite using OpenPGP certificates.

1187

1188

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

1189

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

1190

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

1191

# "+DHE-DSS"))

782

783

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

784

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

785

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

786

# u"+DHE-DSS"))

1192

787

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

1193

788

priority = self.server.gnutls_priority

1194

789

if priority is None:

1195

priority = "NORMAL"

790

priority = u"NORMAL"

1196

791

(gnutls.library.functions

1197

792

.gnutls_priority_set_direct(session._c_object,

1198

793

priority, None))

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

794

1212

795

try:

1213

796

session.handshake()

1214

797

except gnutls.errors.GNUTLSError, error:

1215

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

798

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

1216

799

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

1217

800

# established. Just abandon the request.

1218

801

return

1219

logger.debug("Handshake succeeded")

1220

1221

approval_required = False

802

logger.debug(u"Handshake succeeded")

1222

803

try:

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()

804

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

805

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

806

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

807

session.bye()

808

return

809

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

1309

810

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")

811

for c in self.server.clients:

812

if c.fingerprint == fpr:

813

client = c

814

break

815

else:

816

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

817

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

818

session.bye()

819

return

820

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

821

# possible that the client timed out while establishing

822

# the GnuTLS session.

823

if not client.still_valid():

824

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

825

session.bye()

826

return

827

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

828

sent_size = 0

829

while sent_size < len(client.secret):

830

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

831

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

832

sent, len(client.secret)

833

- (sent_size + sent))

834

sent_size += sent

835

session.bye()

1317

836

1318

837

@staticmethod

1319

838

def peer_certificate(session):

1329

848

.gnutls_certificate_get_peers

1330

849

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

1331

850

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

1332

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

1333

" certificate")

851

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

852

u" certificate")

1334

853

if list_size.value == 0:

1335

854

return None

1336

855

cert = cert_list[0]

1362

881

if crtverify.value != 0:

1363

882

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1364

883

raise (gnutls.errors.CertificateSecurityError

1365

("Verify failed"))

884

(u"Verify failed"))

1366

885

# New buffer for the fingerprint

1367

886

buf = ctypes.create_string_buffer(20)

1368

887

buf_len = ctypes.c_size_t()

1375

894

# Convert the buffer to a Python bytestring

1376

895

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

1377

896

# Convert the bytestring to hexadecimal notation

1378

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

897

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

1379

898

return hex_fpr

1380

899

1381

900

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

class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):

902

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

1398

903

def process_request(self, request, client_address):

1399

904

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

1400

905

1401

906

This function creates a new pipe in self.pipe

1402

907

"""

1403

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1404

1405

super(MultiprocessingMixInWithPipe,

908

self.pipe = os.pipe()

909

super(ForkingMixInWithPipe,

1406

910

self).process_request(request, client_address)

1407

self.child_pipe.close()

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

911

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

912

self.add_pipe(self.pipe[0])

913

def add_pipe(self, pipe):

1411

914

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

1412

raise NotImplementedError

1413

1414

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

915

os.close(pipe)

916

917

918

class IPv6_TCPServer(ForkingMixInWithPipe,

1415

919

socketserver.TCPServer, object):

1416

920

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

1417

921

1433

937

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

1434

938

if self.interface is not None:

1435

939

if SO_BINDTODEVICE is None:

1436

logger.error("SO_BINDTODEVICE does not exist;"

1437

" cannot bind to interface %s",

940

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

941

u" cannot bind to interface %s",

1438

942

self.interface)

1439

943

else:

1440

944

try:

1441

945

self.socket.setsockopt(socket.SOL_SOCKET,

1442

946

SO_BINDTODEVICE,

1443

947

str(self.interface

1444

+ '\0'))

948

+ u'\0'))

1445

949

except socket.error, error:

1446

950

if error[0] == errno.EPERM:

1447

logger.error("No permission to"

1448

" bind to interface %s",

951

logger.error(u"No permission to"

952

u" bind to interface %s",

1449

953

self.interface)

1450

954

elif error[0] == errno.ENOPROTOOPT:

1451

logger.error("SO_BINDTODEVICE not available;"

1452

" cannot bind to interface %s",

955

logger.error(u"SO_BINDTODEVICE not available;"

956

u" cannot bind to interface %s",

1453

957

self.interface)

1454

958

else:

1455

959

raise

1457

961

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

1458

962

if not self.server_address[0]:

1459

963

if self.address_family == socket.AF_INET6:

1460

any_address = "::" # in6addr_any

964

any_address = u"::" # in6addr_any

1461

965

else:

1462

966

any_address = socket.INADDR_ANY

1463

967

self.server_address = (any_address,

1502

1006

return socketserver.TCPServer.server_activate(self)

1503

1007

def enable(self):

1504

1008

self.enabled = True

1505

def add_pipe(self, parent_pipe):

1009

def add_pipe(self, pipe):

1506

1010

# Call "handle_ipc" for both data and EOF events

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):

1011

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

1012

self.handle_ipc)

1013

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

1514

1014

condition_names = {

1515

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

1516

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

1015

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

1016

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

1517

1017

# blocking).

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

1018

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

1019

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

1020

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

1521

1021

# broken, usually for pipes and

1522

1022

# sockets).

1523

1023

}

1525

1025

for cond, name in

1526

1026

condition_names.iteritems()

1527

1027

if cond & condition)

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

1028

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

1029

conditions_string)

1030

1031

# Turn the pipe file descriptor into a Python file object

1032

if source not in file_objects:

1033

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

1034

1035

# Read a line from the file object

1036

cmdline = file_objects[source].readline()

1037

if not cmdline: # Empty line means end of file

1038

# close the IPC pipe

1039

file_objects[source].close()

1040

del file_objects[source]

1041

1042

# Stop calling this function

1043

return False

1044

1045

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

1046

1047

# Parse and act on command

1048

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

1049

1050

if cmd == u"NOTFOUND":

1051

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

1052

args)

1053

if self.use_dbus:

1054

# Emit D-Bus signal

1055

mandos_dbus_service.ClientNotFound(args)

1056

elif cmd == u"INVALID":

1057

for client in self.clients:

1058

if client.name == args:

1059

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

1060

if self.use_dbus:

1061

# Emit D-Bus signal

1062

client.Rejected()

1063

break

1064

else:

1065

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

1066

elif cmd == u"SENDING":

1067

for client in self.clients:

1068

if client.name == args:

1069

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

1070

client.checked_ok()

1071

if self.use_dbus:

1072

# Emit D-Bus signal

1073

client.ReceivedSecret()

1074

break

1075

else:

1076

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

1077

args)

1078

else:

1079

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

1080

1081

# Keep calling this function

1580

1082

return True

1581

1083

1582

1084

1583

1085

def string_to_delta(interval):

1584

1086

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

1585

1087

1586

>>> string_to_delta('7d')

1088

>>> string_to_delta(u'7d')

1587

1089

datetime.timedelta(7)

1588

>>> string_to_delta('60s')

1090

>>> string_to_delta(u'60s')

1589

1091

datetime.timedelta(0, 60)

1590

>>> string_to_delta('60m')

1092

>>> string_to_delta(u'60m')

1591

1093

datetime.timedelta(0, 3600)

1592

>>> string_to_delta('24h')

1094

>>> string_to_delta(u'24h')

1593

1095

datetime.timedelta(1)

1594

>>> string_to_delta('1w')

1096

>>> string_to_delta(u'1w')

1595

1097

datetime.timedelta(7)

1596

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

1098

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

1597

1099

datetime.timedelta(0, 330)

1598

1100

"""

1599

1101

timevalue = datetime.timedelta(0)

1601

1103

try:

1602

1104

suffix = unicode(s[-1])

1603

1105

value = int(s[:-1])

1604

if suffix == "d":

1106

if suffix == u"d":

1605

1107

delta = datetime.timedelta(value)

1606

elif suffix == "s":

1108

elif suffix == u"s":

1607

1109

delta = datetime.timedelta(0, value)

1608

elif suffix == "m":

1110

elif suffix == u"m":

1609

1111

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

1610

elif suffix == "h":

1112

elif suffix == u"h":

1611

1113

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

1612

elif suffix == "w":

1114

elif suffix == u"w":

1613

1115

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

1614

1116

else:

1615

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

1616

except (ValueError, IndexError), e:

1617

raise ValueError(*(e.args))

1117

raise ValueError

1118

except (ValueError, IndexError):

1119

raise ValueError

1618

1120

timevalue += delta

1619

1121

return timevalue

1620

1122

1626

1128

global if_nametoindex

1627

1129

try:

1628

1130

if_nametoindex = (ctypes.cdll.LoadLibrary

1629

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

1131

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

1630

1132

.if_nametoindex)

1631

1133

except (OSError, AttributeError):

1632

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

1134

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

1633

1135

def if_nametoindex(interface):

1634

1136

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

1635

1137

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

1636

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

1138

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

1637

1139

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1638

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

1140

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

1639

1141

interface))

1640

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

1142

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

1641

1143

ifreq[16:20])[0]

1642

1144

return interface_index

1643

1145

return if_nametoindex(interface)

1651

1153

sys.exit()

1652

1154

os.setsid()

1653

1155

if not nochdir:

1654

os.chdir("/")

1156

os.chdir(u"/")

1655

1157

if os.fork():

1656

1158

sys.exit()

1657

1159

if not noclose:

1659

1161

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

1660

1162

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

1661

1163

raise OSError(errno.ENODEV,

1662

"%s not a character device"

1663

% os.path.devnull)

1164

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

1664

1165

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

1665

1166

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

1666

1167

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

1673

1174

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

1674

1175

# Parsing of options, both command line and config file

1675

1176

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()

1177

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

1178

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

1179

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

1180

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

1181

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

1182

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

1183

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

1184

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

1185

help=u"Run self-test")

1186

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

1187

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

1188

u" terminal")

1189

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

1190

u" priority string (see GnuTLS documentation)")

1191

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

1192

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

1193

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

1194

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

1195

help=u"Directory to search for configuration"

1196

u" files")

1197

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

1198

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

1199

u" system bus interface")

1200

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

1201

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

1202

options = parser.parse_args()[0]

1707

1203

1708

1204

if options.check:

1709

1205

import doctest

1711

1207

sys.exit()

1712

1208

1713

1209

# Default values for config file for server-global settings

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": "",

1210

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

1211

u"address": u"",

1212

u"port": u"",

1213

u"debug": u"False",

1214

u"priority":

1215

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

1216

u"servicename": u"Mandos",

1217

u"use_dbus": u"True",

1218

u"use_ipv6": u"True",

1724

1219

}

1725

1220

1726

1221

# Parse config file for server-global settings

1727

1222

server_config = configparser.SafeConfigParser(server_defaults)

1728

1223

del server_defaults

1729

1224

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

1730

"mandos.conf"))

1225

u"mandos.conf"))

1731

1226

# Convert the SafeConfigParser object to a dict

1732

1227

server_settings = server_config.defaults()

1733

1228

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

1734

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

1735

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

1229

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

1230

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

1736

1231

option)

1737

1232

if server_settings["port"]:

1738

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

1739

"port")

1233

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

1234

u"port")

1740

1235

del server_config

1741

1236

1742

1237

# Override the settings from the config file with command line

1743

1238

# options, if set.

1744

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

1745

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

1746

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

1239

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

1240

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

1241

u"use_dbus", u"use_ipv6"):

1747

1242

value = getattr(options, option)

1748

1243

if value is not None:

1749

1244

server_settings[option] = value

1757

1252

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

1758

1253

1759

1254

# For convenience

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":

1255

debug = server_settings[u"debug"]

1256

use_dbus = server_settings[u"use_dbus"]

1257

use_ipv6 = server_settings[u"use_ipv6"]

1258

1259

if not debug:

1260

syslogger.setLevel(logging.WARNING)

1261

console.setLevel(logging.WARNING)

1262

1263

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

1766

1264

syslogger.setFormatter(logging.Formatter

1767

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

1768

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

1769

% server_settings["servicename"]))

1265

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

1266

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

1267

% server_settings[u"servicename"]))

1770

1268

1771

1269

# Parse config file with clients

1772

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

1773

"interval": "5m",

1774

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

1775

"host": "",

1776

"approval_delay": "0s",

1777

"approval_duration": "1s",

1270

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

1271

u"interval": u"5m",

1272

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

1273

u"host": u"",

1778

1274

}

1779

1275

client_config = configparser.SafeConfigParser(client_defaults)

1780

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

1781

"clients.conf"))

1276

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

1277

u"clients.conf"))

1782

1278

1783

1279

global mandos_dbus_service

1784

1280

mandos_dbus_service = None

1785

1281

1786

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

1787

server_settings["port"]),

1282

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

1283

server_settings[u"port"]),

1788

1284

ClientHandler,

1789

interface=(server_settings["interface"]

1790

or None),

1285

interface=server_settings[u"interface"],

1791

1286

use_ipv6=use_ipv6,

1792

1287

gnutls_priority=

1793

server_settings["priority"],

1288

server_settings[u"priority"],

1794

1289

use_dbus=use_dbus)

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)

1290

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

1291

try:

1292

pidfile = open(pidfilename, u"w")

1293

except IOError:

1294

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

1801

1295

1802

1296

try:

1803

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

1804

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

1297

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

1298

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

1805

1299

except KeyError:

1806

1300

try:

1807

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

1808

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

1301

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

1302

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

1809

1303

except KeyError:

1810

1304

try:

1811

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

1812

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

1305

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

1306

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

1813

1307

except KeyError:

1814

1308

uid = 65534

1815

1309

gid = 65534

1820

1314

if error[0] != errno.EPERM:

1821

1315

raise error

1822

1316

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

1317

# Enable all possible GnuTLS debugging

1831

1318

if debug:

1832

# Enable all possible GnuTLS debugging

1833

1834

1319

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

1835

1320

# - GnuTLS manual

1836

1321

gnutls.library.functions.gnutls_global_set_log_level(11)

1837

1322

1838

1323

@gnutls.library.types.gnutls_log_func

1839

1324

def debug_gnutls(level, string):

1840

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

1325

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

1841

1326

1842

1327

(gnutls.library.functions

1843

1328

.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()

1858

1329

1859

1330

global main_loop

1860

1331

# From the Avahi example code

1863

1334

bus = dbus.SystemBus()

1864

1335

# End of Avahi example code

1865

1336

if use_dbus:

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

1337

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

1874

1338

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1875

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

1876

servicetype = "_mandos._tcp",

1339

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

1340

servicetype = u"_mandos._tcp",

1877

1341

protocol = protocol, bus = bus)

1878

1342

if server_settings["interface"]:

1879

1343

service.interface = (if_nametoindex

1880

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

1881

1882

global multiprocessing_manager

1883

multiprocessing_manager = multiprocessing.Manager()

1344

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

1884

1345

1885

1346

client_class = Client

1886

1347

if use_dbus:

1887

1348

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

1900

1349

tcp_server.clients.update(set(

1901

1350

client_class(name = section,

1902

config= dict(client_config_items(

1903

client_config, section)))

1351

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

1904

1352

for section in client_config.sections()))

1905

1353

if not tcp_server.clients:

1906

logger.warning("No clients defined")

1354

logger.warning(u"No clients defined")

1355

1356

if debug:

1357

# Redirect stdin so all checkers get /dev/null

1358

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

1359

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

1360

if null > 2:

1361

os.close(null)

1362

else:

1363

# No console logging

1364

logger.removeHandler(console)

1365

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

1366

daemon()

1367

1368

try:

1369

with closing(pidfile):

1370

pid = os.getpid()

1371

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

1372

del pidfile

1373

except IOError:

1374

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

1375

pidfilename, pid)

1376

except NameError:

1377

# "pidfile" was never created

1378

pass

1379

del pidfilename

1380

1381

def cleanup():

1382

"Cleanup function; run on exit"

1383

service.cleanup()

1907

1384

1385

while tcp_server.clients:

1386

client = tcp_server.clients.pop()

1387

client.disable_hook = None

1388

client.disable()

1389

1390

atexit.register(cleanup)

1391

1908

1392

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

1922

1393

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

1923

1924

1394

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

1925

1395

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

1926

1396

1928

1398

class MandosDBusService(dbus.service.Object):

1929

1399

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

1930

1400

def __init__(self):

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")

1401

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

1402

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

1403

1404

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

1405

def ClientAdded(self, objpath, properties):

1406

"D-Bus signal"

1407

pass

1408

1409

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

1410

def ClientNotFound(self, fingerprint):

1411

"D-Bus signal"

1412

pass

1413

1414

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

1945

1415

def ClientRemoved(self, objpath, name):

1946

1416

"D-Bus signal"

1947

1417

pass

1948

1418

1949

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

1419

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

1950

1420

def GetAllClients(self):

1951

1421

"D-Bus method"

1952

1422

return dbus.Array(c.dbus_object_path

1953

1423

for c in tcp_server.clients)

1954

1424

1955

1425

@dbus.service.method(_interface,

1956

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

1426

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

1957

1427

def GetAllClientsWithProperties(self):

1958

1428

"D-Bus method"

1959

1429

return dbus.Dictionary(

1960

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

1430

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

1961

1431

for c in tcp_server.clients),

1962

signature="oa{sv}")

1432

signature=u"oa{sv}")

1963

1433

1964

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

1434

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

1965

1435

def RemoveClient(self, object_path):

1966

1436

"D-Bus method"

1967

1437

for c in tcp_server.clients:

1969

1439

tcp_server.clients.remove(c)

1970

1440

c.remove_from_connection()

1971

1441

# Don't signal anything except ClientRemoved

1972

c.disable(quiet=True)

1442

c.disable(signal=False)

1973

1443

# Emit D-Bus signal

1974

1444

self.ClientRemoved(object_path, c.name)

1975

1445

return

1976

raise KeyError(object_path)

1446

raise KeyError

1977

1447

1978

1448

del _interface

1979

1449

1980

1450

mandos_dbus_service = MandosDBusService()

1981

1451

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

2000

1452

for client in tcp_server.clients:

2001

1453

if use_dbus:

2002

1454

# Emit D-Bus signal

2003

mandos_dbus_service.ClientAdded(client.dbus_object_path)

1455

mandos_dbus_service.ClientAdded(client.dbus_object_path,

1456

client.GetAllProperties())

2004

1457

client.enable()

2005

1458

2006

1459

tcp_server.enable()

2009

1462

# Find out what port we got

2010

1463

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

2011

1464

if use_ipv6:

2012

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

1465

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

2013

1466

" flowinfo %d, scope_id %d"

2014

1467

% tcp_server.socket.getsockname())

2015

1468

else: # IPv4

2016

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

1469

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

2017

1470

% tcp_server.socket.getsockname())

2018

1471

2019

1472

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

2023

1476

try:

2024

1477

service.activate()

2025

1478

except dbus.exceptions.DBusException, error:

2026

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

2027

cleanup()

1479

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

2028

1480

sys.exit(1)

2029

1481

# End of Avahi example code

2030

1482

2033

1485

(tcp_server.handle_request

2034

1486

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

2035

1487

2036

logger.debug("Starting main loop")

1488

logger.debug(u"Starting main loop")

2037

1489

main_loop.run()

2038

1490

except AvahiError, error:

2039

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

2040

cleanup()

1491

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

2041

1492

sys.exit(1)

2042

1493

except KeyboardInterrupt:

2043

1494

if debug:

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()

1495

print >> sys.stderr

1496

logger.debug(u"Server received KeyboardInterrupt")

1497

logger.debug(u"Server exiting")

2049

1498

2050

1499

if __name__ == '__main__':

2051

1500

main()