/mandos/release : revision 237.7.19

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

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#

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# Everything else is

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#

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

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

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

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#

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from __future__ import division, with_statement, absolute_import

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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import socket

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import logging

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import logging.handlers

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import pwd

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from contextlib import closing

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import contextlib

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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import multiprocessing

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import dbus

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import dbus.service

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SO_BINDTODEVICE = None

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version = "1.0.12"

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version = "1.2.3"

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logger = logging.Logger(u'mandos')

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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

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syslogger.setFormatter(logging.Formatter

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

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u' %(message)s'))

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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u' %(levelname)s:'

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u' %(message)s'))

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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Attributes:

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

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Used to optionally bind to the specified interface.

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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"""

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

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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u" after %i retries, exiting.",

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError(u"Too many renames")

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

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

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unicode(self.name))

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raise AvahiServiceError("Too many renames")

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

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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

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

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% self.name))

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self.remove()

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self.add()

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try:

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self.add()

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except dbus.exceptions.DBusException, error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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self.group.connect_to_signal('StateChanged',

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self

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.entry_group_state_changed)

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

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

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self.name, self.type)

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self.group.AddService(

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self.interface,

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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

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logger.debug("Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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

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unicode(error))

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raise AvahiGroupError(u"State changed: %s"

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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self.group = None

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def server_state_changed(self, state):

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

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

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if state == avahi.SERVER_COLLISION:

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

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logger.error("Zeroconf server name collision")

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self.remove()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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self.bus.get_object(avahi.DBUS_NAME,

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avahi.DBUS_PATH_SERVER),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal(u"StateChanged",

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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

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

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

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Attributes:

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D-Bus identifiers

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

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uniquely identify the client

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

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host: string; available for use by the checker command

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

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last_enabled: datetime.datetime(); (UTC)

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enabled: bool()

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

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

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until this client is invalid

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

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

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

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

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

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

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to see if the client lives.

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'None' if no process is running.

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checker_initiator_tag: a gobject event source tag, or None

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disable_initiator_tag: - '' -

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checker_callback_tag: - '' -

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

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client lives. %() expansions are done at

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checker_callback_tag: a gobject event source tag, or None

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checker_command: string; External command which is run to check

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if client lives. %() expansions are done at

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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uniquely identify the client

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host: string; available for use by the checker command

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

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

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

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last_enabled: datetime.datetime(); (UTC)

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D-Bus identifiers

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

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

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until this client is disabled

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runtime_expansions: Allowed attributes for runtime expansion.

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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

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self.name = name

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if config is None:

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config = {}

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

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

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

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

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

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if u"secret" in config:

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

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elif u"secfile" in config:

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with closing(open(os.path.expanduser

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(os.path.expandvars

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

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

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.replace(" ", ""))

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

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if "secret" in config:

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

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elif "secfile" in config:

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

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(config["secfile"])),

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"rb") as secfile:

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self.secret = secfile.read()

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else:

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

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

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% self.name)

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

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

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self.created = datetime.datetime.utcnow()

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self.enabled = False

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self.last_approval_request = None

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self.last_enabled = None

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self.last_checked_ok = None

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

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

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

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

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self.disable_hook = disable_hook

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

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self.checker_callback_tag = None

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self.checker_command = config[u"checker"]

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self.checker_command = config["checker"]

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self.current_checker_command = None

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self.last_connect = None

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self._approved = None

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

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True)

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self.approvals_pending = 0

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self.approval_delay = string_to_delta(

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config["approval_delay"])

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self.approval_duration = string_to_delta(

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config["approval_duration"])

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

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def send_changedstate(self):

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self.changedstate.acquire()

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self.changedstate.notify_all()

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self.changedstate.release()

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def enable(self):

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

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

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

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# Already enabled

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return

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self.send_changedstate()

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self.last_enabled = datetime.datetime.utcnow()

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

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# and every interval from then on.

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self.checker_initiator_tag = (gobject.timeout_add

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(self.interval_milliseconds(),

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self.start_checker))

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# Also start a new checker *right now*.

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self.start_checker()

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

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self.disable_initiator_tag = (gobject.timeout_add

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(self.timeout_milliseconds(),

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self.disable))

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self.enabled = True

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# Also start a new checker *right now*.

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self.start_checker()

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def disable(self):

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def disable(self, quiet=True):

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"""Disable this client."""

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

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return False

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

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

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if not quiet:

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self.send_changedstate()

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if not quiet:

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

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

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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

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

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = None

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self.stop_checker()

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if os.WIFEXITED(condition):

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exitstatus = os.WEXITSTATUS(condition)

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if exitstatus == 0:

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

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

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vars(self))

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self.checked_ok()

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else:

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

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

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vars(self))

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else:

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

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

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vars(self))

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def checked_ok(self):

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(self.timeout_milliseconds(),

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self.disable))

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def need_approval(self):

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self.last_approval_request = datetime.datetime.utcnow()

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def start_checker(self):

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

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# client would inevitably timeout, since no checker would get

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

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

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

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# is as it should be.

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

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# should be.

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

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if self.checker is not None:

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try:

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pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

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except (AttributeError, OSError), error:

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if (isinstance(error, OSError)

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and error.errno != errno.ECHILD):

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raise error

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else:

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if pid:

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

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logger.warning("Checker was a zombie")

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback(pid, status,

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self.current_checker_command)

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command = self.checker_command % self.host

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except TypeError:

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# Escape attributes for the shell

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escaped_attrs = dict((key,

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re.escape(unicode(str(val),

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errors=

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u'replace')))

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for key, val in

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vars(self).iteritems())

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escaped_attrs = dict(

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(attr,

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

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errors=

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'replace')))

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for attr in

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self.runtime_expansions)

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try:

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command = self.checker_command % escaped_attrs

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except TypeError, error:

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

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

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

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' %s', self.checker_command, error)

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return True # Try again later

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self.current_checker_command = command

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try:

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

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

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command, self.name)

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

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

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# always replaced by /dev/null.)

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self.checker = subprocess.Popen(command,

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close_fds=True,

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shell=True, cwd=u"/")

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shell=True, cwd="/")

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self.checker_callback_tag = (gobject.child_watch_add

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(self.checker.pid,

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self.checker_callback,

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback(pid, status, command)

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except OSError, error:

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

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

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error)

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

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return True

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if self.checker_callback_tag:

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback_tag = None

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

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

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return

461

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

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

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try:

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

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#os.sleep(0.5)

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#time.sleep(0.5)

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

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

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except OSError, error:

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

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raise

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self.checker = None

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def still_valid(self):

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

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

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return False

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now = datetime.datetime.utcnow()

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if self.last_checked_ok is None:

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

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else:

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

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

484

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

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def dbus_service_property(dbus_interface, signature="v",

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access="readwrite", byte_arrays=False):

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"""Decorators for marking methods of a DBusObjectWithProperties to

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become properties on the D-Bus.

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

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

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"""

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

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

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if byte_arrays and signature != "ay":

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

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" signature %r" % signature)

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541

def decorator(func):

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func._dbus_is_property = True

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func._dbus_interface = dbus_interface

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func._dbus_signature = signature

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func._dbus_access = access

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func._dbus_name = func.__name__

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

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

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

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

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func._dbus_get_args_options = {'byte_arrays': byte_arrays }

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return func

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return decorator

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@staticmethod

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def _is_dbus_property(obj):

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

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return getattr(obj, "_dbus_is_property", False)

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584

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def _get_all_dbus_properties(self):

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

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property with the specified name and interface.

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595

"""

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for name in (property_name,

551

property_name + u"_dbus_property"):

597

property_name + "_dbus_property"):

552

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prop = getattr(self, name, None)

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if (prop is None

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or not self._is_dbus_property(prop)

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continue

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return prop

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# No such property

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raise DBusPropertyNotFound(self.dbus_object_path + u":"

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+ interface_name + u"."

607

raise DBusPropertyNotFound(self.dbus_object_path + ":"

608

+ interface_name + "."

563

609

+ property_name)

564

610

565

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

566

out_signature=u"v")

611

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

612

out_signature="v")

567

613

def Get(self, interface_name, property_name):

568

614

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

569

615

"""

570

616

prop = self._get_dbus_property(interface_name, property_name)

571

if prop._dbus_access == u"write":

617

if prop._dbus_access == "write":

572

618

raise DBusPropertyAccessException(property_name)

573

619

value = prop()

574

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

620

if not hasattr(value, "variant_level"):

575

621

return value

576

622

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

577

623

578

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

624

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

579

625

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

580

626

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

581

627

"""

582

628

prop = self._get_dbus_property(interface_name, property_name)

583

if prop._dbus_access == u"read":

629

if prop._dbus_access == "read":

584

630

raise DBusPropertyAccessException(property_name)

585

if prop._dbus_get_args_options[u"byte_arrays"]:

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

586

636

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

587

637

for byte in value))

588

638

prop(value)

589

639

590

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

591

out_signature=u"a{sv}")

640

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

641

out_signature="a{sv}")

592

642

def GetAll(self, interface_name):

593

643

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

594

644

standard.

602

652

# Interface non-empty but did not match

603

653

continue

604

654

# Ignore write-only properties

605

if prop._dbus_access == u"write":

655

if prop._dbus_access == "write":

606

656

continue

607

657

value = prop()

608

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

658

if not hasattr(value, "variant_level"):

609

659

all[name] = value

610

660

continue

611

661

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

612

662

value.variant_level+1)

613

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

663

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

614

664

615

665

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

616

out_signature=u"s",

666

out_signature="s",

617

667

path_keyword='object_path',

618

668

connection_keyword='connection')

619

669

def Introspect(self, object_path, connection):

620

670

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

621

671

"""

622

672

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

623

connection)

624

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

625

del xmlstring

626

def make_tag(document, name, prop):

627

e = document.createElement(u"property")

628

e.setAttribute(u"name", name)

629

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

630

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

631

return e

632

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

633

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

634

for name, prop

635

in self._get_all_dbus_properties()

636

if prop._dbus_interface

637

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

638

if_tag.appendChild(tag)

639

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

640

document.unlink()

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)

641

710

return xmlstring

642

711

643

712

648

717

dbus_object_path: dbus.ObjectPath

649

718

bus: dbus.SystemBus()

650

719

"""

720

721

runtime_expansions = (Client.runtime_expansions

722

+ ("dbus_object_path",))

723

651

724

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

652

725

653

726

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

727

self._approvals_pending = 0

654

728

self.bus = bus

655

729

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

656

730

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

657

731

# the D-Bus

732

client_object_name = unicode(self.name).translate(

733

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

734

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

658

735

self.dbus_object_path = (dbus.ObjectPath

659

(u"/clients/"

660

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

736

("/clients/" + client_object_name))

661

737

DBusObjectWithProperties.__init__(self, self.bus,

662

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

663

755

664

756

@staticmethod

665

757

def _datetime_to_dbus(dt, variant_level=0):

668

760

variant_level=variant_level)

669

761

670

762

def enable(self):

671

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

763

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

672

764

r = Client.enable(self)

673

765

if oldstate != self.enabled:

674

766

# Emit D-Bus signals

675

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

767

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

676

768

dbus.Boolean(True, variant_level=1))

677

769

self.PropertyChanged(

678

dbus.String(u"last_enabled"),

770

dbus.String("LastEnabled"),

679

771

self._datetime_to_dbus(self.last_enabled,

680

772

variant_level=1))

681

773

return r

682

774

683

def disable(self, signal = True):

684

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

685

r = Client.disable(self)

686

if signal and oldstate != self.enabled:

775

def disable(self, quiet = False):

776

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

777

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

778

if not quiet and oldstate != self.enabled:

687

779

# Emit D-Bus signal

688

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

780

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

689

781

dbus.Boolean(False, variant_level=1))

690

782

return r

691

783

694

786

self.remove_from_connection()

695

787

except LookupError:

696

788

pass

697

if hasattr(DBusObjectWithProperties, u"__del__"):

789

if hasattr(DBusObjectWithProperties, "__del__"):

698

790

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

699

791

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

700

792

703

795

self.checker_callback_tag = None

704

796

self.checker = None

705

797

# Emit D-Bus signal

706

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

798

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

707

799

dbus.Boolean(False, variant_level=1))

708

800

if os.WIFEXITED(condition):

709

801

exitstatus = os.WEXITSTATUS(condition)

724

816

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

725

817

# Emit D-Bus signal

726

818

self.PropertyChanged(

727

dbus.String(u"last_checked_ok"),

819

dbus.String("LastCheckedOK"),

728

820

(self._datetime_to_dbus(self.last_checked_ok,

729

821

variant_level=1)))

730

822

return r

731

823

824

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

825

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

826

# Emit D-Bus signal

827

self.PropertyChanged(

828

dbus.String("LastApprovalRequest"),

829

(self._datetime_to_dbus(self.last_approval_request,

830

variant_level=1)))

831

return r

832

732

833

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

733

834

old_checker = self.checker

734

835

if self.checker is not None:

742

843

# Emit D-Bus signal

743

844

self.CheckerStarted(self.current_checker_command)

744

845

self.PropertyChanged(

745

dbus.String(u"checker_running"),

846

dbus.String("CheckerRunning"),

746

847

dbus.Boolean(True, variant_level=1))

747

848

return r

748

849

749

850

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

750

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

851

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

751

852

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

752

853

if (old_checker is not None

753

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

754

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

854

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

855

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

755

856

dbus.Boolean(False, variant_level=1))

756

857

return r

757

758

## D-Bus methods & signals

759

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

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

760

875

761

876

# CheckerCompleted - signal

762

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

877

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

763

878

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

764

879

"D-Bus signal"

765

880

pass

766

881

767

882

# CheckerStarted - signal

768

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

883

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

769

884

def CheckerStarted(self, command):

770

885

"D-Bus signal"

771

886

pass

772

887

773

888

# PropertyChanged - signal

774

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

889

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

775

890

def PropertyChanged(self, property, value):

776

891

"D-Bus signal"

777

892

pass

778

893

779

# ReceivedSecret - signal

894

# GotSecret - signal

780

895

@dbus.service.signal(_interface)

781

def ReceivedSecret(self):

782

"D-Bus signal"

896

def GotSecret(self):

897

"""D-Bus signal

898

Is sent after a successful transfer of secret from the Mandos

899

server to mandos-client

900

"""

783

901

pass

784

902

785

903

# Rejected - signal

786

@dbus.service.signal(_interface)

787

def Rejected(self):

904

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

905

def Rejected(self, reason):

788

906

"D-Bus signal"

789

907

pass

790

908

791

# name - property

792

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

793

def name_dbus_property(self):

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()

926

927

# Enable - method

928

@dbus.service.method(_interface)

929

def Enable(self):

930

"D-Bus method"

931

self.enable()

932

933

# StartChecker - method

934

@dbus.service.method(_interface)

935

def StartChecker(self):

936

"D-Bus method"

937

self.start_checker()

938

939

# Disable - method

940

@dbus.service.method(_interface)

941

def Disable(self):

942

"D-Bus method"

943

self.disable()

944

945

# StopChecker - method

946

@dbus.service.method(_interface)

947

def StopChecker(self):

948

self.stop_checker()

949

950

## Properties

951

952

# ApprovalPending - property

953

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

954

def ApprovalPending_dbus_property(self):

955

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

956

957

# ApprovedByDefault - property

958

@dbus_service_property(_interface, signature="b",

959

access="readwrite")

960

def ApprovedByDefault_dbus_property(self, value=None):

961

if value is None: # get

962

return dbus.Boolean(self.approved_by_default)

963

self.approved_by_default = bool(value)

964

# Emit D-Bus signal

965

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

966

dbus.Boolean(value, variant_level=1))

967

968

# ApprovalDelay - property

969

@dbus_service_property(_interface, signature="t",

970

access="readwrite")

971

def ApprovalDelay_dbus_property(self, value=None):

972

if value is None: # get

973

return dbus.UInt64(self.approval_delay_milliseconds())

974

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

975

# Emit D-Bus signal

976

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

977

dbus.UInt64(value, variant_level=1))

978

979

# ApprovalDuration - property

980

@dbus_service_property(_interface, signature="t",

981

access="readwrite")

982

def ApprovalDuration_dbus_property(self, value=None):

983

if value is None: # get

984

return dbus.UInt64(self._timedelta_to_milliseconds(

985

self.approval_duration))

986

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

987

# Emit D-Bus signal

988

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

989

dbus.UInt64(value, variant_level=1))

990

991

# Name - property

992

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

993

def Name_dbus_property(self):

794

994

return dbus.String(self.name)

795

995

796

# fingerprint - property

797

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

798

def fingerprint_dbus_property(self):

996

# Fingerprint - property

997

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

998

def Fingerprint_dbus_property(self):

799

999

return dbus.String(self.fingerprint)

800

1000

801

# host - property

802

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

803

access=u"readwrite")

804

def host_dbus_property(self, value=None):

1001

# Host - property

1002

@dbus_service_property(_interface, signature="s",

1003

access="readwrite")

1004

def Host_dbus_property(self, value=None):

805

1005

if value is None: # get

806

1006

return dbus.String(self.host)

807

1007

self.host = value

808

1008

# Emit D-Bus signal

809

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

1009

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

810

1010

dbus.String(value, variant_level=1))

811

1011

812

# created - property

813

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

814

def created_dbus_property(self):

1012

# Created - property

1013

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

1014

def Created_dbus_property(self):

815

1015

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

816

1016

817

# last_enabled - property

818

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

819

def last_enabled_dbus_property(self):

1017

# LastEnabled - property

1018

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

1019

def LastEnabled_dbus_property(self):

820

1020

if self.last_enabled is None:

821

return dbus.String(u"")

1021

return dbus.String("")

822

1022

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

823

1023

824

# enabled - property

825

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

826

access=u"readwrite")

827

def enabled_dbus_property(self, value=None):

1024

# Enabled - property

1025

@dbus_service_property(_interface, signature="b",

1026

access="readwrite")

1027

def Enabled_dbus_property(self, value=None):

828

1028

if value is None: # get

829

1029

return dbus.Boolean(self.enabled)

830

1030

if value:

832

1032

else:

833

1033

self.disable()

834

1034

835

# last_checked_ok - property

836

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

837

def last_checked_ok_dbus_property(self):

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

838

1042

if self.last_checked_ok is None:

839

return dbus.String(u"")

1043

return dbus.String("")

840

1044

return dbus.String(self._datetime_to_dbus(self

841

1045

.last_checked_ok))

842

1046

843

# timeout - property

844

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

845

access=u"readwrite")

846

def timeout_dbus_property(self, value=None):

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):

847

1060

if value is None: # get

848

1061

return dbus.UInt64(self.timeout_milliseconds())

849

1062

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

850

1063

# Emit D-Bus signal

851

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

1064

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

852

1065

dbus.UInt64(value, variant_level=1))

853

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

1066

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

854

1067

return

855

1068

# Reschedule timeout

856

1069

gobject.source_remove(self.disable_initiator_tag)

868

1081

self.disable_initiator_tag = (gobject.timeout_add

869

1082

(time_to_die, self.disable))

870

1083

871

# interval - property

872

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

873

access=u"readwrite")

874

def interval_dbus_property(self, value=None):

1084

# Interval - property

1085

@dbus_service_property(_interface, signature="t",

1086

access="readwrite")

1087

def Interval_dbus_property(self, value=None):

875

1088

if value is None: # get

876

1089

return dbus.UInt64(self.interval_milliseconds())

877

1090

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

878

1091

# Emit D-Bus signal

879

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

1092

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

880

1093

dbus.UInt64(value, variant_level=1))

881

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

1094

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

882

1095

return

883

1096

# Reschedule checker run

884

1097

gobject.source_remove(self.checker_initiator_tag)

886

1099

(value, self.start_checker))

887

1100

self.start_checker() # Start one now, too

888

1101

889

# checker - property

890

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

891

access=u"readwrite")

892

def checker_dbus_property(self, value=None):

1102

# Checker - property

1103

@dbus_service_property(_interface, signature="s",

1104

access="readwrite")

1105

def Checker_dbus_property(self, value=None):

893

1106

if value is None: # get

894

1107

return dbus.String(self.checker_command)

895

1108

self.checker_command = value

896

1109

# Emit D-Bus signal

897

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

1110

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

898

1111

dbus.String(self.checker_command,

899

1112

variant_level=1))

900

1113

901

# checker_running - property

902

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

903

access=u"readwrite")

904

def checker_running_dbus_property(self, value=None):

1114

# CheckerRunning - property

1115

@dbus_service_property(_interface, signature="b",

1116

access="readwrite")

1117

def CheckerRunning_dbus_property(self, value=None):

905

1118

if value is None: # get

906

1119

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

907

1120

if value:

909

1122

else:

910

1123

self.stop_checker()

911

1124

912

# object_path - property

913

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

914

def object_path_dbus_property(self):

1125

# ObjectPath - property

1126

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

1127

def ObjectPath_dbus_property(self):

915

1128

return self.dbus_object_path # is already a dbus.ObjectPath

916

1129

917

# secret = property xxx

918

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

919

access=u"write", byte_arrays=True)

920

def secret_dbus_property(self, value):

1130

# Secret = property

1131

@dbus_service_property(_interface, signature="ay",

1132

access="write", byte_arrays=True)

1133

def Secret_dbus_property(self, value):

921

1134

self.secret = str(value)

922

1135

923

1136

del _interface

924

1137

925

1138

1139

class ProxyClient(object):

1140

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

1141

self._pipe = child_pipe

1142

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

1143

if not self._pipe.recv():

1144

raise KeyError()

1145

1146

def __getattribute__(self, name):

1147

if(name == '_pipe'):

1148

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

1149

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

1150

data = self._pipe.recv()

1151

if data[0] == 'data':

1152

return data[1]

1153

if data[0] == 'function':

1154

def func(*args, **kwargs):

1155

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

1156

return self._pipe.recv()[1]

1157

return func

1158

1159

def __setattr__(self, name, value):

1160

if(name == '_pipe'):

1161

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

1162

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

1163

1164

926

1165

class ClientHandler(socketserver.BaseRequestHandler, object):

927

1166

"""A class to handle client connections.

928

1167

930

1169

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

931

1170

932

1171

def handle(self):

933

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

934

unicode(self.client_address))

935

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

936

# Open IPC pipe to parent process

937

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

1172

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

1173

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

1174

unicode(self.client_address))

1175

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

1176

self.server.child_pipe.fileno())

1177

938

1178

session = (gnutls.connection

939

1179

.ClientSession(self.request,

940

1180

gnutls.connection

941

1181

.X509Credentials()))

942

943

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

944

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

945

try:

946

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

947

raise RuntimeError

948

except (ValueError, IndexError, RuntimeError), error:

949

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

950

return

951

1182

952

1183

# Note: gnutls.connection.X509Credentials is really a

953

1184

# generic GnuTLS certificate credentials object so long as

954

1185

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

955

1186

# here despite using OpenPGP certificates.

956

957

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

958

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

959

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

960

# u"+DHE-DSS"))

1187

1188

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

1189

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

1190

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

1191

# "+DHE-DSS"))

961

1192

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

962

1193

priority = self.server.gnutls_priority

963

1194

if priority is None:

964

priority = u"NORMAL"

1195

priority = "NORMAL"

965

1196

(gnutls.library.functions

966

1197

.gnutls_priority_set_direct(session._c_object,

967

1198

priority, None))

968

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

969

1212

try:

970

1213

session.handshake()

971

1214

except gnutls.errors.GNUTLSError, error:

972

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

1215

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

973

1216

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

974

1217

# established. Just abandon the request.

975

1218

return

976

logger.debug(u"Handshake succeeded")

1219

logger.debug("Handshake succeeded")

1220

1221

approval_required = False

977

1222

try:

978

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

979

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

980

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

981

session.bye()

982

return

983

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

1223

try:

1224

fpr = self.fingerprint(self.peer_certificate

1225

(session))

1226

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

1227

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

1228

return

1229

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

1230

1231

try:

1232

client = ProxyClient(child_pipe, fpr,

1233

self.client_address)

1234

except KeyError:

1235

return

1236

1237

if client.approval_delay:

1238

delay = client.approval_delay

1239

client.approvals_pending += 1

1240

approval_required = True

1241

1242

while True:

1243

if not client.enabled:

1244

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

1245

client.name)

1246

if self.server.use_dbus:

1247

# Emit D-Bus signal

1248

client.Rejected("Disabled")

1249

return

1250

1251

if client._approved or not client.approval_delay:

1252

#We are approved or approval is disabled

1253

break

1254

elif client._approved is None:

1255

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

1256

client.name)

1257

if self.server.use_dbus:

1258

# Emit D-Bus signal

1259

client.NeedApproval(

1260

client.approval_delay_milliseconds(),

1261

client.approved_by_default)

1262

else:

1263

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

1264

client.name)

1265

if self.server.use_dbus:

1266

# Emit D-Bus signal

1267

client.Rejected("Denied")

1268

return

1269

1270

#wait until timeout or approved

1271

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

1272

time = datetime.datetime.now()

1273

client.changedstate.acquire()

1274

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

1275

client.changedstate.release()

1276

time2 = datetime.datetime.now()

1277

if (time2 - time) >= delay:

1278

if not client.approved_by_default:

1279

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

1280

" waiting for approval",

1281

client.name)

1282

if self.server.use_dbus:

1283

# Emit D-Bus signal

1284

client.Rejected("Approval timed out")

1285

return

1286

else:

1287

break

1288

else:

1289

delay -= time2 - time

1290

1291

sent_size = 0

1292

while sent_size < len(client.secret):

1293

try:

1294

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

1295

except (gnutls.errors.GNUTLSError), error:

1296

logger.warning("gnutls send failed")

1297

return

1298

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

1299

sent, len(client.secret)

1300

- (sent_size + sent))

1301

sent_size += sent

1302

1303

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

1304

# bump the timeout as if seen

1305

client.checked_ok()

1306

if self.server.use_dbus:

1307

# Emit D-Bus signal

1308

client.GotSecret()

984

1309

985

for c in self.server.clients:

986

if c.fingerprint == fpr:

987

client = c

988

break

989

else:

990

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

991

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

992

session.bye()

993

return

994

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

995

# possible that the client timed out while establishing

996

# the GnuTLS session.

997

if not client.still_valid():

998

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

999

session.bye()

1000

return

1001

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

1002

sent_size = 0

1003

while sent_size < len(client.secret):

1004

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

1005

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

1006

sent, len(client.secret)

1007

- (sent_size + sent))

1008

sent_size += sent

1009

session.bye()

1310

finally:

1311

if approval_required:

1312

client.approvals_pending -= 1

1313

try:

1314

session.bye()

1315

except (gnutls.errors.GNUTLSError), error:

1316

logger.warning("GnuTLS bye failed")

1010

1317

1011

1318

@staticmethod

1012

1319

def peer_certificate(session):

1022

1329

.gnutls_certificate_get_peers

1023

1330

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

1024

1331

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

1025

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

1026

u" certificate")

1332

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

1333

" certificate")

1027

1334

if list_size.value == 0:

1028

1335

return None

1029

1336

cert = cert_list[0]

1055

1362

if crtverify.value != 0:

1056

1363

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1057

1364

raise (gnutls.errors.CertificateSecurityError

1058

(u"Verify failed"))

1365

("Verify failed"))

1059

1366

# New buffer for the fingerprint

1060

1367

buf = ctypes.create_string_buffer(20)

1061

1368

buf_len = ctypes.c_size_t()

1068

1375

# Convert the buffer to a Python bytestring

1069

1376

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

1070

1377

# Convert the bytestring to hexadecimal notation

1071

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

1378

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

1072

1379

return hex_fpr

1073

1380

1074

1381

1075

class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):

1076

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

1382

class MultiprocessingMixIn(object):

1383

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

1384

def sub_process_main(self, request, address):

1385

try:

1386

self.finish_request(request, address)

1387

except:

1388

self.handle_error(request, address)

1389

self.close_request(request)

1390

1391

def process_request(self, request, address):

1392

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

1393

multiprocessing.Process(target = self.sub_process_main,

1394

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

1395

1396

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1397

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

1077

1398

def process_request(self, request, client_address):

1078

1399

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

1079

1400

1080

1401

This function creates a new pipe in self.pipe

1081

1402

"""

1082

self.pipe = os.pipe()

1083

super(ForkingMixInWithPipe,

1403

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1404

1405

super(MultiprocessingMixInWithPipe,

1084

1406

self).process_request(request, client_address)

1085

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

1086

self.add_pipe(self.pipe[0])

1087

def add_pipe(self, pipe):

1407

self.child_pipe.close()

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

1088

1411

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

1089

os.close(pipe)

1090

1091

1092

class IPv6_TCPServer(ForkingMixInWithPipe,

1412

raise NotImplementedError

1413

1414

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1093

1415

socketserver.TCPServer, object):

1094

1416

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

1095

1417

1111

1433

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

1112

1434

if self.interface is not None:

1113

1435

if SO_BINDTODEVICE is None:

1114

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

1115

u" cannot bind to interface %s",

1436

logger.error("SO_BINDTODEVICE does not exist;"

1437

" cannot bind to interface %s",

1116

1438

self.interface)

1117

1439

else:

1118

1440

try:

1119

1441

self.socket.setsockopt(socket.SOL_SOCKET,

1120

1442

SO_BINDTODEVICE,

1121

1443

str(self.interface

1122

+ u'\0'))

1444

+ '\0'))

1123

1445

except socket.error, error:

1124

1446

if error[0] == errno.EPERM:

1125

logger.error(u"No permission to"

1126

u" bind to interface %s",

1447

logger.error("No permission to"

1448

" bind to interface %s",

1127

1449

self.interface)

1128

1450

elif error[0] == errno.ENOPROTOOPT:

1129

logger.error(u"SO_BINDTODEVICE not available;"

1130

u" cannot bind to interface %s",

1451

logger.error("SO_BINDTODEVICE not available;"

1452

" cannot bind to interface %s",

1131

1453

self.interface)

1132

1454

else:

1133

1455

raise

1135

1457

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

1136

1458

if not self.server_address[0]:

1137

1459

if self.address_family == socket.AF_INET6:

1138

any_address = u"::" # in6addr_any

1460

any_address = "::" # in6addr_any

1139

1461

else:

1140

1462

any_address = socket.INADDR_ANY

1141

1463

self.server_address = (any_address,

1180

1502

return socketserver.TCPServer.server_activate(self)

1181

1503

def enable(self):

1182

1504

self.enabled = True

1183

def add_pipe(self, pipe):

1505

def add_pipe(self, parent_pipe):

1184

1506

# Call "handle_ipc" for both data and EOF events

1185

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

1186

self.handle_ipc)

1187

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

1507

gobject.io_add_watch(parent_pipe.fileno(),

1508

gobject.IO_IN | gobject.IO_HUP,

1509

functools.partial(self.handle_ipc,

1510

parent_pipe = parent_pipe))

1511

1512

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

1513

client_object=None):

1188

1514

condition_names = {

1189

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

1190

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

1515

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

1516

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

1191

1517

# blocking).

1192

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

1193

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

1194

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

1518

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

1519

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

1520

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

1195

1521

# broken, usually for pipes and

1196

1522

# sockets).

1197

1523

}

1199

1525

for cond, name in

1200

1526

condition_names.iteritems()

1201

1527

if cond & condition)

1202

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

1203

conditions_string)

1204

1205

# Turn the pipe file descriptor into a Python file object

1206

if source not in file_objects:

1207

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

1208

1209

# Read a line from the file object

1210

cmdline = file_objects[source].readline()

1211

if not cmdline: # Empty line means end of file

1212

# close the IPC pipe

1213

file_objects[source].close()

1214

del file_objects[source]

1215

1216

# Stop calling this function

1217

return False

1218

1219

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

1220

1221

# Parse and act on command

1222

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

1223

1224

if cmd == u"NOTFOUND":

1225

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

1226

args)

1227

if self.use_dbus:

1228

# Emit D-Bus signal

1229

mandos_dbus_service.ClientNotFound(args)

1230

elif cmd == u"INVALID":

1231

for client in self.clients:

1232

if client.name == args:

1233

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

1234

if self.use_dbus:

1235

# Emit D-Bus signal

1236

client.Rejected()

1237

break

1238

else:

1239

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

1240

elif cmd == u"SENDING":

1241

for client in self.clients:

1242

if client.name == args:

1243

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

1244

client.checked_ok()

1245

if self.use_dbus:

1246

# Emit D-Bus signal

1247

client.ReceivedSecret()

1248

break

1249

else:

1250

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

1251

args)

1252

else:

1253

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

1254

1255

# Keep calling this function

1528

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

1529

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

1530

return False

1531

1532

# Read a request from the child

1533

request = parent_pipe.recv()

1534

command = request[0]

1535

1536

if command == 'init':

1537

fpr = request[1]

1538

address = request[2]

1539

1540

for c in self.clients:

1541

if c.fingerprint == fpr:

1542

client = c

1543

break

1544

else:

1545

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

1546

"dress: %s", fpr, address)

1547

if self.use_dbus:

1548

# Emit D-Bus signal

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

1550

parent_pipe.send(False)

1551

return False

1552

1553

gobject.io_add_watch(parent_pipe.fileno(),

1554

gobject.IO_IN | gobject.IO_HUP,

1555

functools.partial(self.handle_ipc,

1556

parent_pipe = parent_pipe,

1557

client_object = client))

1558

parent_pipe.send(True)

1559

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

1560

return False

1561

if command == 'funcall':

1562

funcname = request[1]

1563

args = request[2]

1564

kwargs = request[3]

1565

1566

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

1567

1568

if command == 'getattr':

1569

attrname = request[1]

1570

if callable(client_object.__getattribute__(attrname)):

1571

parent_pipe.send(('function',))

1572

else:

1573

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

1574

1575

if command == 'setattr':

1576

attrname = request[1]

1577

value = request[2]

1578

setattr(client_object, attrname, value)

1579

1256

1580

return True

1257

1581

1258

1582

1259

1583

def string_to_delta(interval):

1260

1584

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

1261

1585

1262

>>> string_to_delta(u'7d')

1586

>>> string_to_delta('7d')

1263

1587

datetime.timedelta(7)

1264

>>> string_to_delta(u'60s')

1588

>>> string_to_delta('60s')

1265

1589

datetime.timedelta(0, 60)

1266

>>> string_to_delta(u'60m')

1590

>>> string_to_delta('60m')

1267

1591

datetime.timedelta(0, 3600)

1268

>>> string_to_delta(u'24h')

1592

>>> string_to_delta('24h')

1269

1593

datetime.timedelta(1)

1270

>>> string_to_delta(u'1w')

1594

>>> string_to_delta('1w')

1271

1595

datetime.timedelta(7)

1272

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

1596

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

1273

1597

datetime.timedelta(0, 330)

1274

1598

"""

1275

1599

timevalue = datetime.timedelta(0)

1277

1601

try:

1278

1602

suffix = unicode(s[-1])

1279

1603

value = int(s[:-1])

1280

if suffix == u"d":

1604

if suffix == "d":

1281

1605

delta = datetime.timedelta(value)

1282

elif suffix == u"s":

1606

elif suffix == "s":

1283

1607

delta = datetime.timedelta(0, value)

1284

elif suffix == u"m":

1608

elif suffix == "m":

1285

1609

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

1286

elif suffix == u"h":

1610

elif suffix == "h":

1287

1611

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

1288

elif suffix == u"w":

1612

elif suffix == "w":

1289

1613

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

1290

1614

else:

1291

raise ValueError

1292

except (ValueError, IndexError):

1293

raise ValueError

1615

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

1616

except (ValueError, IndexError), e:

1617

raise ValueError(*(e.args))

1294

1618

timevalue += delta

1295

1619

return timevalue

1296

1620

1302

1626

global if_nametoindex

1303

1627

try:

1304

1628

if_nametoindex = (ctypes.cdll.LoadLibrary

1305

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

1629

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

1306

1630

.if_nametoindex)

1307

1631

except (OSError, AttributeError):

1308

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

1632

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

1309

1633

def if_nametoindex(interface):

1310

1634

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

1311

1635

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

1312

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

1636

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

1313

1637

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1314

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

1638

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

1315

1639

interface))

1316

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

1640

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

1317

1641

ifreq[16:20])[0]

1318

1642

return interface_index

1319

1643

return if_nametoindex(interface)

1327

1651

sys.exit()

1328

1652

os.setsid()

1329

1653

if not nochdir:

1330

os.chdir(u"/")

1654

os.chdir("/")

1331

1655

if os.fork():

1332

1656

sys.exit()

1333

1657

if not noclose:

1335

1659

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

1336

1660

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

1337

1661

raise OSError(errno.ENODEV,

1338

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

1662

"%s not a character device"

1663

% os.path.devnull)

1339

1664

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

1340

1665

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

1341

1666

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

1349

1674

# Parsing of options, both command line and config file

1350

1675

1351

1676

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

1352

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

1353

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

1354

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

1355

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

1356

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

1357

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

1358

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

1359

help=u"Run self-test")

1360

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

1361

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

1362

u" terminal")

1363

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

1364

u" priority string (see GnuTLS documentation)")

1365

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

1366

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

1367

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

1368

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

1369

help=u"Directory to search for configuration"

1370

u" files")

1371

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

1372

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

1373

u" system bus interface")

1374

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

1375

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

1677

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

1678

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

1679

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

1680

help="Address to listen for requests on")

1681

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

1682

help="Port number to receive requests on")

1683

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

1684

help="Run self-test")

1685

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

1686

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

1687

" terminal")

1688

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

1689

help="Debug level for stdout output")

1690

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

1691

" priority string (see GnuTLS documentation)")

1692

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

1693

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

1694

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

1695

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

1696

help="Directory to search for configuration"

1697

" files")

1698

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

1699

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

1700

" system bus interface")

1701

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

1702

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

1376

1703

options = parser.parse_args()[0]

1377

1704

1378

1705

if options.check:

1381

1708

sys.exit()

1382

1709

1383

1710

# Default values for config file for server-global settings

1384

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

1385

u"address": u"",

1386

u"port": u"",

1387

u"debug": u"False",

1388

u"priority":

1389

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

1390

u"servicename": u"Mandos",

1391

u"use_dbus": u"True",

1392

u"use_ipv6": u"True",

1711

server_defaults = { "interface": "",

1712

"address": "",

1713

"port": "",

1714

"debug": "False",

1715

"priority":

1716

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

1717

"servicename": "Mandos",

1718

"use_dbus": "True",

1719

"use_ipv6": "True",

1720

"debuglevel": "",

1393

1721

}

1394

1722

1395

1723

# Parse config file for server-global settings

1396

1724

server_config = configparser.SafeConfigParser(server_defaults)

1397

1725

del server_defaults

1398

1726

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

1399

u"mandos.conf"))

1727

"mandos.conf"))

1400

1728

# Convert the SafeConfigParser object to a dict

1401

1729

server_settings = server_config.defaults()

1402

1730

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

1403

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

1404

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

1731

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

1732

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

1405

1733

option)

1406

1734

if server_settings["port"]:

1407

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

1408

u"port")

1735

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

1736

"port")

1409

1737

del server_config

1410

1738

1411

1739

# Override the settings from the config file with command line

1412

1740

# options, if set.

1413

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

1414

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

1415

u"use_dbus", u"use_ipv6"):

1741

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

1742

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

1743

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

1416

1744

value = getattr(options, option)

1417

1745

if value is not None:

1418

1746

server_settings[option] = value

1426

1754

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

1427

1755

1428

1756

# For convenience

1429

debug = server_settings[u"debug"]

1430

use_dbus = server_settings[u"use_dbus"]

1431

use_ipv6 = server_settings[u"use_ipv6"]

1432

1433

if not debug:

1434

syslogger.setLevel(logging.WARNING)

1435

console.setLevel(logging.WARNING)

1436

1437

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

1757

debug = server_settings["debug"]

1758

debuglevel = server_settings["debuglevel"]

1759

use_dbus = server_settings["use_dbus"]

1760

use_ipv6 = server_settings["use_ipv6"]

1761

1762

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

1438

1763

syslogger.setFormatter(logging.Formatter

1439

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

1440

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

1441

% server_settings[u"servicename"]))

1764

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

1765

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

1766

% server_settings["servicename"]))

1442

1767

1443

1768

# Parse config file with clients

1444

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

1445

u"interval": u"5m",

1446

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

1447

u"host": u"",

1769

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

1770

"interval": "5m",

1771

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

1772

"host": "",

1773

"approval_delay": "0s",

1774

"approval_duration": "1s",

1448

1775

}

1449

1776

client_config = configparser.SafeConfigParser(client_defaults)

1450

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

1451

u"clients.conf"))

1777

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

1778

"clients.conf"))

1452

1779

1453

1780

global mandos_dbus_service

1454

1781

mandos_dbus_service = None

1455

1782

1456

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

1457

server_settings[u"port"]),

1783

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

1784

server_settings["port"]),

1458

1785

ClientHandler,

1459

interface=server_settings[u"interface"],

1786

interface=(server_settings["interface"]

1787

or None),

1460

1788

use_ipv6=use_ipv6,

1461

1789

gnutls_priority=

1462

server_settings[u"priority"],

1790

server_settings["priority"],

1463

1791

use_dbus=use_dbus)

1464

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

1465

try:

1466

pidfile = open(pidfilename, u"w")

1467

except IOError:

1468

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

1792

if not debug:

1793

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

1794

try:

1795

pidfile = open(pidfilename, "w")

1796

except IOError:

1797

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

1469

1798

1470

1799

try:

1471

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

1472

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

1800

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

1801

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

1473

1802

except KeyError:

1474

1803

try:

1475

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

1476

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

1804

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

1805

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

1477

1806

except KeyError:

1478

1807

try:

1479

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

1480

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

1808

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

1809

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

1481

1810

except KeyError:

1482

1811

uid = 65534

1483

1812

gid = 65534

1488

1817

if error[0] != errno.EPERM:

1489

1818

raise error

1490

1819

1491

# Enable all possible GnuTLS debugging

1820

if not debug and not debuglevel:

1821

syslogger.setLevel(logging.WARNING)

1822

console.setLevel(logging.WARNING)

1823

if debuglevel:

1824

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

1825

syslogger.setLevel(level)

1826

console.setLevel(level)

1827

1492

1828

if debug:

1829

# Enable all possible GnuTLS debugging

1830

1493

1831

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

1494

1832

# - GnuTLS manual

1495

1833

gnutls.library.functions.gnutls_global_set_log_level(11)

1496

1834

1497

1835

@gnutls.library.types.gnutls_log_func

1498

1836

def debug_gnutls(level, string):

1499

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

1837

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

1500

1838

1501

1839

(gnutls.library.functions

1502

1840

.gnutls_global_set_log_function(debug_gnutls))

1841

1842

# Redirect stdin so all checkers get /dev/null

1843

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

1844

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

1845

if null > 2:

1846

os.close(null)

1847

else:

1848

# No console logging

1849

logger.removeHandler(console)

1850

1851

# Need to fork before connecting to D-Bus

1852

if not debug:

1853

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

1854

daemon()

1503

1855

1504

1856

global main_loop

1505

1857

# From the Avahi example code

1508

1860

bus = dbus.SystemBus()

1509

1861

# End of Avahi example code

1510

1862

if use_dbus:

1511

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

1863

try:

1864

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

1865

bus, do_not_queue=True)

1866

except dbus.exceptions.NameExistsException, e:

1867

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

1868

use_dbus = False

1869

server_settings["use_dbus"] = False

1870

tcp_server.use_dbus = False

1512

1871

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1513

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

1514

servicetype = u"_mandos._tcp",

1872

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

1873

servicetype = "_mandos._tcp",

1515

1874

protocol = protocol, bus = bus)

1516

1875

if server_settings["interface"]:

1517

1876

service.interface = (if_nametoindex

1518

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

1877

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

1878

1879

global multiprocessing_manager

1880

multiprocessing_manager = multiprocessing.Manager()

1519

1881

1520

1882

client_class = Client

1521

1883

if use_dbus:

1522

1884

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

1885

def client_config_items(config, section):

1886

special_settings = {

1887

"approved_by_default":

1888

lambda: config.getboolean(section,

1889

"approved_by_default"),

1890

}

1891

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

1892

try:

1893

yield (name, special_settings[name]())

1894

except KeyError:

1895

yield (name, value)

1896

1523

1897

tcp_server.clients.update(set(

1524

1898

client_class(name = section,

1525

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

1899

config= dict(client_config_items(

1900

client_config, section)))

1526

1901

for section in client_config.sections()))

1527

1902

if not tcp_server.clients:

1528

logger.warning(u"No clients defined")

1529

1530

if debug:

1531

# Redirect stdin so all checkers get /dev/null

1532

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

1533

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

1534

if null > 2:

1535

os.close(null)

1536

else:

1537

# No console logging

1538

logger.removeHandler(console)

1539

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

1540

daemon()

1541

1542

try:

1543

with closing(pidfile):

1544

pid = os.getpid()

1545

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

1546

del pidfile

1547

except IOError:

1548

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

1549

pidfilename, pid)

1550

except NameError:

1551

# "pidfile" was never created

1552

pass

1553

del pidfilename

1554

1555

def cleanup():

1556

"Cleanup function; run on exit"

1557

service.cleanup()

1903

logger.warning("No clients defined")

1558

1904

1559

while tcp_server.clients:

1560

client = tcp_server.clients.pop()

1561

client.disable_hook = None

1562

client.disable()

1563

1564

atexit.register(cleanup)

1565

1566

1905

if not debug:

1906

try:

1907

with pidfile:

1908

pid = os.getpid()

1909

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

1910

del pidfile

1911

except IOError:

1912

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

1913

pidfilename, pid)

1914

except NameError:

1915

# "pidfile" was never created

1916

pass

1917

del pidfilename

1918

1567

1919

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

1920

1568

1921

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

1569

1922

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

1570

1923

1572

1925

class MandosDBusService(dbus.service.Object):

1573

1926

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

1574

1927

def __init__(self):

1575

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

1576

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

1577

1578

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

1579

def ClientAdded(self, objpath, properties):

1580

"D-Bus signal"

1581

pass

1582

1583

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

1584

def ClientNotFound(self, fingerprint):

1585

"D-Bus signal"

1586

pass

1587

1588

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

1928

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

1929

_interface = "se.bsnet.fukt.Mandos"

1930

1931

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

1932

def ClientAdded(self, objpath):

1933

"D-Bus signal"

1934

pass

1935

1936

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

1937

def ClientNotFound(self, fingerprint, address):

1938

"D-Bus signal"

1939

pass

1940

1941

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

1589

1942

def ClientRemoved(self, objpath, name):

1590

1943

"D-Bus signal"

1591

1944

pass

1592

1945

1593

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

1946

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

1594

1947

def GetAllClients(self):

1595

1948

"D-Bus method"

1596

1949

return dbus.Array(c.dbus_object_path

1597

1950

for c in tcp_server.clients)

1598

1951

1599

1952

@dbus.service.method(_interface,

1600

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

1953

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

1601

1954

def GetAllClientsWithProperties(self):

1602

1955

"D-Bus method"

1603

1956

return dbus.Dictionary(

1604

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

1957

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

1605

1958

for c in tcp_server.clients),

1606

signature=u"oa{sv}")

1959

signature="oa{sv}")

1607

1960

1608

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

1961

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

1609

1962

def RemoveClient(self, object_path):

1610

1963

"D-Bus method"

1611

1964

for c in tcp_server.clients:

1613

1966

tcp_server.clients.remove(c)

1614

1967

c.remove_from_connection()

1615

1968

# Don't signal anything except ClientRemoved

1616

c.disable(signal=False)

1969

c.disable(quiet=True)

1617

1970

# Emit D-Bus signal

1618

1971

self.ClientRemoved(object_path, c.name)

1619

1972

return

1620

raise KeyError

1973

raise KeyError(object_path)

1621

1974

1622

1975

del _interface

1623

1976

1624

1977

mandos_dbus_service = MandosDBusService()

1625

1978

1979

def cleanup():

1980

"Cleanup function; run on exit"

1981

service.cleanup()

1982

1983

while tcp_server.clients:

1984

client = tcp_server.clients.pop()

1985

if use_dbus:

1986

client.remove_from_connection()

1987

client.disable_hook = None

1988

# Don't signal anything except ClientRemoved

1989

client.disable(quiet=True)

1990

if use_dbus:

1991

# Emit D-Bus signal

1992

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

1993

client.name)

1994

1995

atexit.register(cleanup)

1996

1626

1997

for client in tcp_server.clients:

1627

1998

if use_dbus:

1628

1999

# Emit D-Bus signal

1629

mandos_dbus_service.ClientAdded(client.dbus_object_path,

1630

client.GetAll(u""))

2000

mandos_dbus_service.ClientAdded(client.dbus_object_path)

1631

2001

client.enable()

1632

2002

1633

2003

tcp_server.enable()

1636

2006

# Find out what port we got

1637

2007

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

1638

2008

if use_ipv6:

1639

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

2009

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

1640

2010

" flowinfo %d, scope_id %d"

1641

2011

% tcp_server.socket.getsockname())

1642

2012

else: # IPv4

1643

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

2013

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

1644

2014

% tcp_server.socket.getsockname())

1645

2015

1646

2016

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

1650

2020

try:

1651

2021

service.activate()

1652

2022

except dbus.exceptions.DBusException, error:

1653

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

2023

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

2024

cleanup()

1654

2025

sys.exit(1)

1655

2026

# End of Avahi example code

1656

2027

1659

2030

(tcp_server.handle_request

1660

2031

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

1661

2032

1662

logger.debug(u"Starting main loop")

2033

logger.debug("Starting main loop")

1663

2034

main_loop.run()

1664

2035

except AvahiError, error:

1665

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

2036

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

2037

cleanup()

1666

2038

sys.exit(1)

1667

2039

except KeyboardInterrupt:

1668

2040

if debug:

1669

print >> sys.stderr

1670

logger.debug(u"Server received KeyboardInterrupt")

1671

logger.debug(u"Server exiting")

2041

print("", file=sys.stderr)

2042

logger.debug("Server received KeyboardInterrupt")

2043

logger.debug("Server exiting")

2044

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

2045

cleanup()

1672

2046

1673

2047

if __name__ == '__main__':

1674

2048

main()