/mandos/release : revision 237.2.132

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

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#

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# Everything else is

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#

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

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from __future__ import division, with_statement, absolute_import

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import SocketServer as socketserver

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import socket

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import logging

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import logging.handlers

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import pwd

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import contextlib

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from contextlib import closing

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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import multiprocessing

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import dbus

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import dbus.service

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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SO_BINDTODEVICE = None

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version = "1.3.0"

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version = "1.0.11"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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logger = logging.Logger(u'mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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

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u' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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

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u' %(levelname)s:'

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u' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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Attributes:

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

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Used to optionally bind to the specified interface.

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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"""

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

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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

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u" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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

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

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self.name)

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raise AvahiServiceError(u"Too many renames")

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

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

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unicode(self.name))

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syslogger.setFormatter(logging.Formatter

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

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

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException, error:

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

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self.cleanup()

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os._exit(1)

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self.add()

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self.rename_count += 1

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def remove(self):

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

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.group.connect_to_signal('StateChanged',

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self

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.entry_group_state_changed)

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

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self.entry_group_state_changed)

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

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self.name, self.type)

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self.group.AddService(

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self.interface,

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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logger.debug("Zeroconf service established.")

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

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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raise AvahiGroupError(u"State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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self.group = None

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def server_state_changed(self, state):

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

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

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if state == avahi.SERVER_COLLISION:

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logger.error("Zeroconf server name collision")

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

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self.remove()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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self.bus.get_object(avahi.DBUS_NAME,

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avahi.DBUS_PATH_SERVER),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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self.server.connect_to_signal(u"StateChanged",

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self.server_state_changed)

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

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

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Attributes:

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

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

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

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D-Bus identifiers

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

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uniquely identify the client

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

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host: string; available for use by the checker command

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

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last_enabled: datetime.datetime(); (UTC)

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enabled: bool()

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

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

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until this client is invalid

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

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

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

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to see if the client lives.

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'None' if no process is running.

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checker_callback_tag: a gobject event source tag, or None

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checker_command: string; External command which is run to check

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if client lives. %() expansions are done at

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checker_initiator_tag: a gobject event source tag, or None

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disable_initiator_tag: - '' -

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checker_callback_tag: - '' -

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

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client lives. %() expansions are done at

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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uniquely identify the client

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host: string; available for use by the checker command

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

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

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

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last_enabled: datetime.datetime(); (UTC)

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D-Bus identifiers

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

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

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until this client is disabled

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runtime_expansions: Allowed attributes for runtime expansion.

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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def _datetime_to_milliseconds(dt):

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"Convert a datetime.datetime() to milliseconds"

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

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+ (dt.seconds * 1000)

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+ (dt.microseconds // 1000))

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.timeout)

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return self._datetime_to_milliseconds(self.timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return self._timedelta_to_milliseconds(self.approval_delay)

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return self._datetime_to_milliseconds(self.interval)

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

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

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self.name = name

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if config is None:

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config = {}

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

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

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

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.replace(" ", ""))

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

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if "secret" in config:

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

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elif "secfile" in config:

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

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(config["secfile"])),

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"rb") as secfile:

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

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

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

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if u"secret" in config:

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

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elif u"secfile" in config:

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with closing(open(os.path.expanduser

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(os.path.expandvars

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

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self.secret = secfile.read()

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else:

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

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

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% self.name)

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

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

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self.created = datetime.datetime.utcnow()

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self.enabled = False

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self.last_approval_request = None

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self.last_enabled = None

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self.last_checked_ok = None

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

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

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

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

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self.disable_hook = disable_hook

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

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self.checker_callback_tag = None

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self.checker_command = config["checker"]

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self.checker_command = config[u"checker"]

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self.current_checker_command = None

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self.last_connect = None

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self._approved = None

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

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True)

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self.approvals_pending = 0

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self.approval_delay = string_to_delta(

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config["approval_delay"])

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self.approval_duration = string_to_delta(

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config["approval_duration"])

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

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def send_changedstate(self):

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self.changedstate.acquire()

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self.changedstate.notify_all()

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self.changedstate.release()

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def enable(self):

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

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

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

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# Already enabled

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return

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self.send_changedstate()

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self.last_enabled = datetime.datetime.utcnow()

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

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# and every interval from then on.

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self.checker_initiator_tag = (gobject.timeout_add

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(self.interval_milliseconds(),

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self.start_checker))

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# Also start a new checker *right now*.

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self.start_checker()

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

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self.disable_initiator_tag = (gobject.timeout_add

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(self.timeout_milliseconds(),

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self.disable))

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self.enabled = True

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# Also start a new checker *right now*.

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self.start_checker()

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def disable(self, quiet=True):

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def disable(self):

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"""Disable this client."""

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

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return False

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if not quiet:

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self.send_changedstate()

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if not quiet:

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

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

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

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

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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

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

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = None

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self.stop_checker()

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if os.WIFEXITED(condition):

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exitstatus = os.WEXITSTATUS(condition)

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if exitstatus == 0:

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

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

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vars(self))

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self.checked_ok()

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else:

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

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

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vars(self))

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else:

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

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

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vars(self))

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def checked_ok(self):

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(self.timeout_milliseconds(),

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self.disable))

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def need_approval(self):

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self.last_approval_request = datetime.datetime.utcnow()

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def start_checker(self):

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

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# client would inevitably timeout, since no checker would get

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

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

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

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# should be.

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

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# is as it should be.

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

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try:

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if self.checker is not None:

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

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except (AttributeError, OSError), error:

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if (isinstance(error, OSError)

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and error.errno != errno.ECHILD):

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raise error

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else:

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if pid:

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logger.warning("Checker was a zombie")

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

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback(pid, status,

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self.current_checker_command)

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command = self.checker_command % self.host

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except TypeError:

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# Escape attributes for the shell

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escaped_attrs = dict(

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(attr,

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

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errors=

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'replace')))

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for attr in

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self.runtime_expansions)

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escaped_attrs = dict((key,

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re.escape(unicode(str(val),

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errors=

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u'replace')))

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for key, val in

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vars(self).iteritems())

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try:

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419

command = self.checker_command % escaped_attrs

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except TypeError, error:

476

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

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' %s', self.checker_command, error)

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

422

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

478

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return True # Try again later

479

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self.current_checker_command = command

480

425

try:

481

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

426

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

482

427

command, self.name)

483

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

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429

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

486

431

# always replaced by /dev/null.)

487

432

self.checker = subprocess.Popen(command,

488

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close_fds=True,

489

shell=True, cwd="/")

434

shell=True, cwd=u"/")

490

435

self.checker_callback_tag = (gobject.child_watch_add

491

436

(self.checker.pid,

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437

self.checker_callback,

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443

gobject.source_remove(self.checker_callback_tag)

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444

self.checker_callback(pid, status, command)

500

445

except OSError, error:

501

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

446

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

502

447

error)

503

448

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

504

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return True

508

453

if self.checker_callback_tag:

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454

gobject.source_remove(self.checker_callback_tag)

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455

self.checker_callback_tag = None

511

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

456

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

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457

return

513

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

458

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

514

459

try:

515

460

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

516

#time.sleep(0.5)

461

#os.sleep(0.5)

517

462

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

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463

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

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464

except OSError, error:

520

465

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

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raise

522

467

self.checker = None

523

524

def dbus_service_property(dbus_interface, signature="v",

525

access="readwrite", byte_arrays=False):

526

"""Decorators for marking methods of a DBusObjectWithProperties to

527

become properties on the D-Bus.

528

529

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

530

and with one argument by "Set".

531

532

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

533

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

534

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

535

"""

536

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

537

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

538

if byte_arrays and signature != "ay":

539

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

540

" signature %r" % signature)

541

def decorator(func):

542

func._dbus_is_property = True

543

func._dbus_interface = dbus_interface

544

func._dbus_signature = signature

545

func._dbus_access = access

546

func._dbus_name = func.__name__

547

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

548

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

549

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

550

return func

551

return decorator

552

553

554

class DBusPropertyException(dbus.exceptions.DBusException):

555

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

556

"""

557

def __unicode__(self):

558

return unicode(str(self))

559

560

561

class DBusPropertyAccessException(DBusPropertyException):

562

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

563

"""

564

pass

565

566

567

class DBusPropertyNotFound(DBusPropertyException):

568

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

569

"""

570

pass

571

572

573

class DBusObjectWithProperties(dbus.service.Object):

574

"""A D-Bus object with properties.

575

576

Classes inheriting from this can use the dbus_service_property

577

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

578

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

579

"""

580

581

@staticmethod

582

def _is_dbus_property(obj):

583

return getattr(obj, "_dbus_is_property", False)

584

585

def _get_all_dbus_properties(self):

586

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

587

"""

588

return ((prop._dbus_name, prop)

589

for name, prop in

590

inspect.getmembers(self, self._is_dbus_property))

591

592

def _get_dbus_property(self, interface_name, property_name):

593

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

594

property with the specified name and interface.

595

"""

596

for name in (property_name,

597

property_name + "_dbus_property"):

598

prop = getattr(self, name, None)

599

if (prop is None

600

or not self._is_dbus_property(prop)

601

or prop._dbus_name != property_name

602

or (interface_name and prop._dbus_interface

603

and interface_name != prop._dbus_interface)):

604

continue

605

return prop

606

# No such property

607

raise DBusPropertyNotFound(self.dbus_object_path + ":"

608

+ interface_name + "."

609

+ property_name)

610

611

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

612

out_signature="v")

613

def Get(self, interface_name, property_name):

614

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

615

"""

616

prop = self._get_dbus_property(interface_name, property_name)

617

if prop._dbus_access == "write":

618

raise DBusPropertyAccessException(property_name)

619

value = prop()

620

if not hasattr(value, "variant_level"):

621

return value

622

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

623

624

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

625

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

626

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

627

"""

628

prop = self._get_dbus_property(interface_name, property_name)

629

if prop._dbus_access == "read":

630

raise DBusPropertyAccessException(property_name)

631

if prop._dbus_get_args_options["byte_arrays"]:

632

# The byte_arrays option is not supported yet on

633

# signatures other than "ay".

634

if prop._dbus_signature != "ay":

635

raise ValueError

636

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

637

for byte in value))

638

prop(value)

639

640

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

641

out_signature="a{sv}")

642

def GetAll(self, interface_name):

643

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

644

standard.

645

646

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

647

"""

648

all = {}

649

for name, prop in self._get_all_dbus_properties():

650

if (interface_name

651

and interface_name != prop._dbus_interface):

652

# Interface non-empty but did not match

653

continue

654

# Ignore write-only properties

655

if prop._dbus_access == "write":

656

continue

657

value = prop()

658

if not hasattr(value, "variant_level"):

659

all[name] = value

660

continue

661

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

662

value.variant_level+1)

663

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

664

665

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

666

out_signature="s",

667

path_keyword='object_path',

668

connection_keyword='connection')

669

def Introspect(self, object_path, connection):

670

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

671

"""

672

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

673

connection)

674

try:

675

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

676

def make_tag(document, name, prop):

677

e = document.createElement("property")

678

e.setAttribute("name", name)

679

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

680

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

681

return e

682

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

683

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

684

for name, prop

685

in self._get_all_dbus_properties()

686

if prop._dbus_interface

687

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

688

if_tag.appendChild(tag)

689

# Add the names to the return values for the

690

# "org.freedesktop.DBus.Properties" methods

691

if (if_tag.getAttribute("name")

692

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

693

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

694

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

695

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

696

if (arg.getAttribute("direction")

697

== "out"):

698

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

699

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

700

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

701

if (arg.getAttribute("direction")

702

== "out"):

703

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

704

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

705

document.unlink()

706

except (AttributeError, xml.dom.DOMException,

707

xml.parsers.expat.ExpatError), error:

708

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

709

error)

710

return xmlstring

711

712

713

class ClientDBus(Client, DBusObjectWithProperties):

468

469

def still_valid(self):

470

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

471

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

472

return False

473

now = datetime.datetime.utcnow()

474

if self.last_checked_ok is None:

475

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

476

else:

477

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

478

479

480

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

714

481

"""A Client class using D-Bus

715

482

716

483

Attributes:

717

484

dbus_object_path: dbus.ObjectPath

718

485

bus: dbus.SystemBus()

719

486

"""

720

721

runtime_expansions = (Client.runtime_expansions

722

+ ("dbus_object_path",))

723

724

487

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

725

488

726

489

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

727

self._approvals_pending = 0

728

490

self.bus = bus

729

491

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

730

492

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

731

493

# the D-Bus

732

client_object_name = unicode(self.name).translate(

733

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

734

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

735

494

self.dbus_object_path = (dbus.ObjectPath

736

("/clients/" + client_object_name))

737

DBusObjectWithProperties.__init__(self, self.bus,

738

self.dbus_object_path)

739

740

def _get_approvals_pending(self):

741

return self._approvals_pending

742

def _set_approvals_pending(self, value):

743

old_value = self._approvals_pending

744

self._approvals_pending = value

745

bval = bool(value)

746

if (hasattr(self, "dbus_object_path")

747

and bval is not bool(old_value)):

748

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

749

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

750

dbus_bool)

751

752

approvals_pending = property(_get_approvals_pending,

753

_set_approvals_pending)

754

del _get_approvals_pending, _set_approvals_pending

495

(u"/clients/"

496

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

497

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

498

self.dbus_object_path)

755

499

756

500

@staticmethod

757

501

def _datetime_to_dbus(dt, variant_level=0):

760

504

variant_level=variant_level)

761

505

762

506

def enable(self):

763

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

507

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

764

508

r = Client.enable(self)

765

509

if oldstate != self.enabled:

766

510

# Emit D-Bus signals

767

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

511

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

768

512

dbus.Boolean(True, variant_level=1))

769

513

self.PropertyChanged(

770

dbus.String("LastEnabled"),

514

dbus.String(u"last_enabled"),

771

515

self._datetime_to_dbus(self.last_enabled,

772

516

variant_level=1))

773

517

return r

774

518

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:

519

def disable(self, signal = True):

520

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

521

r = Client.disable(self)

522

if signal and oldstate != self.enabled:

779

523

# Emit D-Bus signal

780

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

524

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

781

525

dbus.Boolean(False, variant_level=1))

782

526

return r

783

527

786

530

self.remove_from_connection()

787

531

except LookupError:

788

532

pass

789

if hasattr(DBusObjectWithProperties, "__del__"):

790

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

533

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

534

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

791

535

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

792

536

793

537

def checker_callback(self, pid, condition, command,

795

539

self.checker_callback_tag = None

796

540

self.checker = None

797

541

# Emit D-Bus signal

798

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

542

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

799

543

dbus.Boolean(False, variant_level=1))

800

544

if os.WIFEXITED(condition):

801

545

exitstatus = os.WEXITSTATUS(condition)

816

560

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

817

561

# Emit D-Bus signal

818

562

self.PropertyChanged(

819

dbus.String("LastCheckedOK"),

563

dbus.String(u"last_checked_ok"),

820

564

(self._datetime_to_dbus(self.last_checked_ok,

821

565

variant_level=1)))

822

566

return r

823

567

824

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

825

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

826

# Emit D-Bus signal

827

self.PropertyChanged(

828

dbus.String("LastApprovalRequest"),

829

(self._datetime_to_dbus(self.last_approval_request,

830

variant_level=1)))

831

return r

832

833

568

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

834

569

old_checker = self.checker

835

570

if self.checker is not None:

843

578

# Emit D-Bus signal

844

579

self.CheckerStarted(self.current_checker_command)

845

580

self.PropertyChanged(

846

dbus.String("CheckerRunning"),

581

dbus.String(u"checker_running"),

847

582

dbus.Boolean(True, variant_level=1))

848

583

return r

849

584

850

585

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

851

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

586

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

852

587

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

853

588

if (old_checker is not None

854

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

855

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

589

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

590

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

856

591

dbus.Boolean(False, variant_level=1))

857

592

return r

858

859

def _reset_approved(self):

860

self._approved = None

861

return False

862

863

def approve(self, value=True):

864

self.send_changedstate()

865

self._approved = value

866

gobject.timeout_add(self._timedelta_to_milliseconds

867

(self.approval_duration),

868

self._reset_approved)

869

870

871

## D-Bus methods, signals & properties

872

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

873

874

## Signals

593

594

## D-Bus methods & signals

595

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

596

597

# CheckedOK - method

598

@dbus.service.method(_interface)

599

def CheckedOK(self):

600

return self.checked_ok()

875

601

876

602

# CheckerCompleted - signal

877

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

603

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

878

604

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

879

605

"D-Bus signal"

880

606

pass

881

607

882

608

# CheckerStarted - signal

883

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

609

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

884

610

def CheckerStarted(self, command):

885

611

"D-Bus signal"

886

612

pass

887

613

614

# GetAllProperties - method

615

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

616

def GetAllProperties(self):

617

"D-Bus method"

618

return dbus.Dictionary({

619

dbus.String(u"name"):

620

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

621

dbus.String(u"fingerprint"):

622

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

623

dbus.String(u"host"):

624

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

625

dbus.String(u"created"):

626

self._datetime_to_dbus(self.created,

627

variant_level=1),

628

dbus.String(u"last_enabled"):

629

(self._datetime_to_dbus(self.last_enabled,

630

variant_level=1)

631

if self.last_enabled is not None

632

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

633

dbus.String(u"enabled"):

634

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

635

dbus.String(u"last_checked_ok"):

636

(self._datetime_to_dbus(self.last_checked_ok,

637

variant_level=1)

638

if self.last_checked_ok is not None

639

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

640

dbus.String(u"timeout"):

641

dbus.UInt64(self.timeout_milliseconds(),

642

variant_level=1),

643

dbus.String(u"interval"):

644

dbus.UInt64(self.interval_milliseconds(),

645

variant_level=1),

646

dbus.String(u"checker"):

647

dbus.String(self.checker_command,

648

variant_level=1),

649

dbus.String(u"checker_running"):

650

dbus.Boolean(self.checker is not None,

651

variant_level=1),

652

dbus.String(u"object_path"):

653

dbus.ObjectPath(self.dbus_object_path,

654

variant_level=1)

655

}, signature=u"sv")

656

657

# IsStillValid - method

658

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

659

def IsStillValid(self):

660

return self.still_valid()

661

888

662

# PropertyChanged - signal

889

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

663

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

890

664

def PropertyChanged(self, property, value):

891

665

"D-Bus signal"

892

666

pass

893

667

894

# GotSecret - signal

668

# ReceivedSecret - signal

895

669

@dbus.service.signal(_interface)

896

def GotSecret(self):

897

"""D-Bus signal

898

Is sent after a successful transfer of secret from the Mandos

899

server to mandos-client

900

"""

670

def ReceivedSecret(self):

671

"D-Bus signal"

901

672

pass

902

673

903

674

# Rejected - signal

904

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

905

def Rejected(self, reason):

675

@dbus.service.signal(_interface)

676

def Rejected(self):

906

677

"D-Bus signal"

907

678

pass

908

679

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()

680

# SetChecker - method

681

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

682

def SetChecker(self, checker):

683

"D-Bus setter method"

684

self.checker_command = checker

685

# Emit D-Bus signal

686

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

687

dbus.String(self.checker_command,

688

variant_level=1))

689

690

# SetHost - method

691

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

692

def SetHost(self, host):

693

"D-Bus setter method"

694

self.host = host

695

# Emit D-Bus signal

696

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

697

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

698

699

# SetInterval - method

700

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

701

def SetInterval(self, milliseconds):

702

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

703

# Emit D-Bus signal

704

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

705

(dbus.UInt64(self.interval_milliseconds(),

706

variant_level=1)))

707

708

# SetSecret - method

709

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

710

byte_arrays=True)

711

def SetSecret(self, secret):

712

"D-Bus setter method"

713

self.secret = str(secret)

714

715

# SetTimeout - method

716

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

717

def SetTimeout(self, milliseconds):

718

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

719

# Emit D-Bus signal

720

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

721

(dbus.UInt64(self.timeout_milliseconds(),

722

variant_level=1)))

926

723

927

724

# Enable - method

928

725

@dbus.service.method(_interface)

947

744

def StopChecker(self):

948

745

self.stop_checker()

949

746

950

## Properties

951

952

# ApprovalPending - property

953

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

954

def ApprovalPending_dbus_property(self):

955

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

956

957

# ApprovedByDefault - property

958

@dbus_service_property(_interface, signature="b",

959

access="readwrite")

960

def ApprovedByDefault_dbus_property(self, value=None):

961

if value is None: # get

962

return dbus.Boolean(self.approved_by_default)

963

self.approved_by_default = bool(value)

964

# Emit D-Bus signal

965

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

966

dbus.Boolean(value, variant_level=1))

967

968

# ApprovalDelay - property

969

@dbus_service_property(_interface, signature="t",

970

access="readwrite")

971

def ApprovalDelay_dbus_property(self, value=None):

972

if value is None: # get

973

return dbus.UInt64(self.approval_delay_milliseconds())

974

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

975

# Emit D-Bus signal

976

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

977

dbus.UInt64(value, variant_level=1))

978

979

# ApprovalDuration - property

980

@dbus_service_property(_interface, signature="t",

981

access="readwrite")

982

def ApprovalDuration_dbus_property(self, value=None):

983

if value is None: # get

984

return dbus.UInt64(self._timedelta_to_milliseconds(

985

self.approval_duration))

986

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

987

# Emit D-Bus signal

988

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

989

dbus.UInt64(value, variant_level=1))

990

991

# Name - property

992

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

993

def Name_dbus_property(self):

994

return dbus.String(self.name)

995

996

# Fingerprint - property

997

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

998

def Fingerprint_dbus_property(self):

999

return dbus.String(self.fingerprint)

1000

1001

# Host - property

1002

@dbus_service_property(_interface, signature="s",

1003

access="readwrite")

1004

def Host_dbus_property(self, value=None):

1005

if value is None: # get

1006

return dbus.String(self.host)

1007

self.host = value

1008

# Emit D-Bus signal

1009

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

1010

dbus.String(value, variant_level=1))

1011

1012

# Created - property

1013

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

1014

def Created_dbus_property(self):

1015

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

1016

1017

# LastEnabled - property

1018

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

1019

def LastEnabled_dbus_property(self):

1020

if self.last_enabled is None:

1021

return dbus.String("")

1022

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

1023

1024

# Enabled - property

1025

@dbus_service_property(_interface, signature="b",

1026

access="readwrite")

1027

def Enabled_dbus_property(self, value=None):

1028

if value is None: # get

1029

return dbus.Boolean(self.enabled)

1030

if value:

1031

self.enable()

1032

else:

1033

self.disable()

1034

1035

# LastCheckedOK - property

1036

@dbus_service_property(_interface, signature="s",

1037

access="readwrite")

1038

def LastCheckedOK_dbus_property(self, value=None):

1039

if value is not None:

1040

self.checked_ok()

1041

return

1042

if self.last_checked_ok is None:

1043

return dbus.String("")

1044

return dbus.String(self._datetime_to_dbus(self

1045

.last_checked_ok))

1046

1047

# LastApprovalRequest - property

1048

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

1049

def LastApprovalRequest_dbus_property(self):

1050

if self.last_approval_request is None:

1051

return dbus.String("")

1052

return dbus.String(self.

1053

_datetime_to_dbus(self

1054

.last_approval_request))

1055

1056

# Timeout - property

1057

@dbus_service_property(_interface, signature="t",

1058

access="readwrite")

1059

def Timeout_dbus_property(self, value=None):

1060

if value is None: # get

1061

return dbus.UInt64(self.timeout_milliseconds())

1062

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

1063

# Emit D-Bus signal

1064

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

1065

dbus.UInt64(value, variant_level=1))

1066

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

1067

return

1068

# Reschedule timeout

1069

gobject.source_remove(self.disable_initiator_tag)

1070

self.disable_initiator_tag = None

1071

time_to_die = (self.

1072

_timedelta_to_milliseconds((self

1073

.last_checked_ok

1074

+ self.timeout)

1075

- datetime.datetime

1076

.utcnow()))

1077

if time_to_die <= 0:

1078

# The timeout has passed

1079

self.disable()

1080

else:

1081

self.disable_initiator_tag = (gobject.timeout_add

1082

(time_to_die, self.disable))

1083

1084

# Interval - property

1085

@dbus_service_property(_interface, signature="t",

1086

access="readwrite")

1087

def Interval_dbus_property(self, value=None):

1088

if value is None: # get

1089

return dbus.UInt64(self.interval_milliseconds())

1090

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

1091

# Emit D-Bus signal

1092

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

1093

dbus.UInt64(value, variant_level=1))

1094

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

1095

return

1096

# Reschedule checker run

1097

gobject.source_remove(self.checker_initiator_tag)

1098

self.checker_initiator_tag = (gobject.timeout_add

1099

(value, self.start_checker))

1100

self.start_checker() # Start one now, too

1101

1102

# Checker - property

1103

@dbus_service_property(_interface, signature="s",

1104

access="readwrite")

1105

def Checker_dbus_property(self, value=None):

1106

if value is None: # get

1107

return dbus.String(self.checker_command)

1108

self.checker_command = value

1109

# Emit D-Bus signal

1110

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

1111

dbus.String(self.checker_command,

1112

variant_level=1))

1113

1114

# CheckerRunning - property

1115

@dbus_service_property(_interface, signature="b",

1116

access="readwrite")

1117

def CheckerRunning_dbus_property(self, value=None):

1118

if value is None: # get

1119

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

1120

if value:

1121

self.start_checker()

1122

else:

1123

self.stop_checker()

1124

1125

# ObjectPath - property

1126

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

1127

def ObjectPath_dbus_property(self):

1128

return self.dbus_object_path # is already a dbus.ObjectPath

1129

1130

# Secret = property

1131

@dbus_service_property(_interface, signature="ay",

1132

access="write", byte_arrays=True)

1133

def Secret_dbus_property(self, value):

1134

self.secret = str(value)

1135

1136

747

del _interface

1137

748

1138

749

1139

class ProxyClient(object):

1140

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

1141

self._pipe = child_pipe

1142

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

1143

if not self._pipe.recv():

1144

raise KeyError()

1145

1146

def __getattribute__(self, name):

1147

if(name == '_pipe'):

1148

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

1149

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

1150

data = self._pipe.recv()

1151

if data[0] == 'data':

1152

return data[1]

1153

if data[0] == 'function':

1154

def func(*args, **kwargs):

1155

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

1156

return self._pipe.recv()[1]

1157

return func

1158

1159

def __setattr__(self, name, value):

1160

if(name == '_pipe'):

1161

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

1162

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

1163

1164

1165

750

class ClientHandler(socketserver.BaseRequestHandler, object):

1166

751

"""A class to handle client connections.

1167

752

1169

754

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

1170

755

1171

756

def handle(self):

1172

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

1173

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

1174

unicode(self.client_address))

1175

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

1176

self.server.child_pipe.fileno())

1177

757

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

758

unicode(self.client_address))

759

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

760

# Open IPC pipe to parent process

761

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

1178

762

session = (gnutls.connection

1179

763

.ClientSession(self.request,

1180

764

gnutls.connection

1181

765

.X509Credentials()))

1182

766

767

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

768

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

769

try:

770

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

771

raise RuntimeError

772

except (ValueError, IndexError, RuntimeError), error:

773

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

774

return

775

1183

776

# Note: gnutls.connection.X509Credentials is really a

1184

777

# generic GnuTLS certificate credentials object so long as

1185

778

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

1186

779

# here despite using OpenPGP certificates.

1187

1188

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

1189

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

1190

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

1191

# "+DHE-DSS"))

780

781

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

782

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

783

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

784

# u"+DHE-DSS"))

1192

785

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

1193

786

priority = self.server.gnutls_priority

1194

787

if priority is None:

1195

priority = "NORMAL"

788

priority = u"NORMAL"

1196

789

(gnutls.library.functions

1197

790

.gnutls_priority_set_direct(session._c_object,

1198

791

priority, None))

1199

1200

# Start communication using the Mandos protocol

1201

# Get protocol number

1202

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

1203

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

1204

try:

1205

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

1206

raise RuntimeError

1207

except (ValueError, IndexError, RuntimeError), error:

1208

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

1209

return

1210

1211

# Start GnuTLS connection

792

1212

793

try:

1213

794

session.handshake()

1214

795

except gnutls.errors.GNUTLSError, error:

1215

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

796

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

1216

797

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

1217

798

# established. Just abandon the request.

1218

799

return

1219

logger.debug("Handshake succeeded")

1220

1221

approval_required = False

800

logger.debug(u"Handshake succeeded")

1222

801

try:

1223

try:

1224

fpr = self.fingerprint(self.peer_certificate

1225

(session))

1226

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

1227

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

1228

return

1229

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

1230

1231

try:

1232

client = ProxyClient(child_pipe, fpr,

1233

self.client_address)

1234

except KeyError:

1235

return

1236

1237

if client.approval_delay:

1238

delay = client.approval_delay

1239

client.approvals_pending += 1

1240

approval_required = True

1241

1242

while True:

1243

if not client.enabled:

1244

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

1245

client.name)

1246

if self.server.use_dbus:

1247

# Emit D-Bus signal

1248

client.Rejected("Disabled")

1249

return

1250

1251

if client._approved or not client.approval_delay:

1252

#We are approved or approval is disabled

1253

break

1254

elif client._approved is None:

1255

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

1256

client.name)

1257

if self.server.use_dbus:

1258

# Emit D-Bus signal

1259

client.NeedApproval(

1260

client.approval_delay_milliseconds(),

1261

client.approved_by_default)

1262

else:

1263

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

1264

client.name)

1265

if self.server.use_dbus:

1266

# Emit D-Bus signal

1267

client.Rejected("Denied")

1268

return

1269

1270

#wait until timeout or approved

1271

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

1272

time = datetime.datetime.now()

1273

client.changedstate.acquire()

1274

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

1275

client.changedstate.release()

1276

time2 = datetime.datetime.now()

1277

if (time2 - time) >= delay:

1278

if not client.approved_by_default:

1279

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

1280

" waiting for approval",

1281

client.name)

1282

if self.server.use_dbus:

1283

# Emit D-Bus signal

1284

client.Rejected("Approval timed out")

1285

return

1286

else:

1287

break

1288

else:

1289

delay -= time2 - time

1290

1291

sent_size = 0

1292

while sent_size < len(client.secret):

1293

try:

1294

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

1295

except (gnutls.errors.GNUTLSError), error:

1296

logger.warning("gnutls send failed")

1297

return

1298

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

1299

sent, len(client.secret)

1300

- (sent_size + sent))

1301

sent_size += sent

1302

1303

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

1304

# bump the timeout as if seen

1305

client.checked_ok()

1306

if self.server.use_dbus:

1307

# Emit D-Bus signal

1308

client.GotSecret()

802

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

803

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

804

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

805

session.bye()

806

return

807

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

1309

808

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")

809

for c in self.server.clients:

810

if c.fingerprint == fpr:

811

client = c

812

break

813

else:

814

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

815

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

816

session.bye()

817

return

818

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

819

# possible that the client timed out while establishing

820

# the GnuTLS session.

821

if not client.still_valid():

822

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

823

session.bye()

824

return

825

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

826

sent_size = 0

827

while sent_size < len(client.secret):

828

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

829

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

830

sent, len(client.secret)

831

- (sent_size + sent))

832

sent_size += sent

833

session.bye()

1317

834

1318

835

@staticmethod

1319

836

def peer_certificate(session):

1329

846

.gnutls_certificate_get_peers

1330

847

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

1331

848

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

1332

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

1333

" certificate")

849

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

850

u" certificate")

1334

851

if list_size.value == 0:

1335

852

return None

1336

853

cert = cert_list[0]

1362

879

if crtverify.value != 0:

1363

880

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1364

881

raise (gnutls.errors.CertificateSecurityError

1365

("Verify failed"))

882

(u"Verify failed"))

1366

883

# New buffer for the fingerprint

1367

884

buf = ctypes.create_string_buffer(20)

1368

885

buf_len = ctypes.c_size_t()

1375

892

# Convert the buffer to a Python bytestring

1376

893

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

1377

894

# Convert the bytestring to hexadecimal notation

1378

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

895

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

1379

896

return hex_fpr

1380

897

1381

898

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 """

899

class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):

900

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

1398

901

def process_request(self, request, client_address):

1399

902

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

1400

903

1401

904

This function creates a new pipe in self.pipe

1402

905

"""

1403

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1404

1405

super(MultiprocessingMixInWithPipe,

906

self.pipe = os.pipe()

907

super(ForkingMixInWithPipe,

1406

908

self).process_request(request, client_address)

1407

self.child_pipe.close()

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

909

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

910

self.add_pipe(self.pipe[0])

911

def add_pipe(self, pipe):

1411

912

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

1412

raise NotImplementedError

1413

1414

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

913

os.close(pipe)

914

915

916

class IPv6_TCPServer(ForkingMixInWithPipe,

1415

917

socketserver.TCPServer, object):

1416

918

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

1417

919

1433

935

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

1434

936

if self.interface is not None:

1435

937

if SO_BINDTODEVICE is None:

1436

logger.error("SO_BINDTODEVICE does not exist;"

1437

" cannot bind to interface %s",

938

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

939

u" cannot bind to interface %s",

1438

940

self.interface)

1439

941

else:

1440

942

try:

1441

943

self.socket.setsockopt(socket.SOL_SOCKET,

1442

944

SO_BINDTODEVICE,

1443

945

str(self.interface

1444

+ '\0'))

946

+ u'\0'))

1445

947

except socket.error, error:

1446

948

if error[0] == errno.EPERM:

1447

logger.error("No permission to"

1448

" bind to interface %s",

949

logger.error(u"No permission to"

950

u" bind to interface %s",

1449

951

self.interface)

1450

952

elif error[0] == errno.ENOPROTOOPT:

1451

logger.error("SO_BINDTODEVICE not available;"

1452

" cannot bind to interface %s",

953

logger.error(u"SO_BINDTODEVICE not available;"

954

u" cannot bind to interface %s",

1453

955

self.interface)

1454

956

else:

1455

957

raise

1457

959

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

1458

960

if not self.server_address[0]:

1459

961

if self.address_family == socket.AF_INET6:

1460

any_address = "::" # in6addr_any

962

any_address = u"::" # in6addr_any

1461

963

else:

1462

964

any_address = socket.INADDR_ANY

1463

965

self.server_address = (any_address,

1481

983

clients: set of Client objects

1482

984

gnutls_priority GnuTLS priority string

1483

985

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

986

clients: set of Client objects

987

gnutls_priority GnuTLS priority string

988

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

1484

989

1485

990

Assumes a gobject.MainLoop event loop.

1486

991

"""

1502

1007

return socketserver.TCPServer.server_activate(self)

1503

1008

def enable(self):

1504

1009

self.enabled = True

1505

def add_pipe(self, parent_pipe):

1010

def add_pipe(self, pipe):

1506

1011

# Call "handle_ipc" for both data and EOF events

1507

gobject.io_add_watch(parent_pipe.fileno(),

1508

gobject.IO_IN | gobject.IO_HUP,

1509

functools.partial(self.handle_ipc,

1510

parent_pipe = parent_pipe))

1511

1512

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

1513

client_object=None):

1012

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

1013

self.handle_ipc)

1014

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

1514

1015

condition_names = {

1515

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

1516

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

1016

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

1017

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

1517

1018

# blocking).

1518

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

1519

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

1520

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

1019

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

1020

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

1021

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

1521

1022

# broken, usually for pipes and

1522

1023

# sockets).

1523

1024

}

1525

1026

for cond, name in

1526

1027

condition_names.iteritems()

1527

1028

if cond & condition)

1528

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

1529

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

1530

return False

1531

1532

# Read a request from the child

1533

request = parent_pipe.recv()

1534

command = request[0]

1535

1536

if command == 'init':

1537

fpr = request[1]

1538

address = request[2]

1539

1540

for c in self.clients:

1541

if c.fingerprint == fpr:

1542

client = c

1543

break

1544

else:

1545

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

1546

"dress: %s", fpr, address)

1547

if self.use_dbus:

1548

# Emit D-Bus signal

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

1550

parent_pipe.send(False)

1551

return False

1552

1553

gobject.io_add_watch(parent_pipe.fileno(),

1554

gobject.IO_IN | gobject.IO_HUP,

1555

functools.partial(self.handle_ipc,

1556

parent_pipe = parent_pipe,

1557

client_object = client))

1558

parent_pipe.send(True)

1559

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

1560

return False

1561

if command == 'funcall':

1562

funcname = request[1]

1563

args = request[2]

1564

kwargs = request[3]

1565

1566

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

1567

1568

if command == 'getattr':

1569

attrname = request[1]

1570

if callable(client_object.__getattribute__(attrname)):

1571

parent_pipe.send(('function',))

1572

else:

1573

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

1574

1575

if command == 'setattr':

1576

attrname = request[1]

1577

value = request[2]

1578

setattr(client_object, attrname, value)

1579

1029

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

1030

conditions_string)

1031

1032

# Turn the pipe file descriptor into a Python file object

1033

if source not in file_objects:

1034

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

1035

1036

# Read a line from the file object

1037

cmdline = file_objects[source].readline()

1038

if not cmdline: # Empty line means end of file

1039

# close the IPC pipe

1040

file_objects[source].close()

1041

del file_objects[source]

1042

1043

# Stop calling this function

1044

return False

1045

1046

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

1047

1048

# Parse and act on command

1049

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

1050

1051

if cmd == u"NOTFOUND":

1052

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

1053

args)

1054

if self.use_dbus:

1055

# Emit D-Bus signal

1056

mandos_dbus_service.ClientNotFound(args)

1057

elif cmd == u"INVALID":

1058

for client in self.clients:

1059

if client.name == args:

1060

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

1061

if self.use_dbus:

1062

# Emit D-Bus signal

1063

client.Rejected()

1064

break

1065

else:

1066

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

1067

elif cmd == u"SENDING":

1068

for client in self.clients:

1069

if client.name == args:

1070

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

1071

client.checked_ok()

1072

if self.use_dbus:

1073

# Emit D-Bus signal

1074

client.ReceivedSecret()

1075

break

1076

else:

1077

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

1078

args)

1079

else:

1080

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

1081

1082

# Keep calling this function

1580

1083

return True

1581

1084

1582

1085

1583

1086

def string_to_delta(interval):

1584

1087

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

1585

1088

1586

>>> string_to_delta('7d')

1089

>>> string_to_delta(u'7d')

1587

1090

datetime.timedelta(7)

1588

>>> string_to_delta('60s')

1091

>>> string_to_delta(u'60s')

1589

1092

datetime.timedelta(0, 60)

1590

>>> string_to_delta('60m')

1093

>>> string_to_delta(u'60m')

1591

1094

datetime.timedelta(0, 3600)

1592

>>> string_to_delta('24h')

1095

>>> string_to_delta(u'24h')

1593

1096

datetime.timedelta(1)

1594

>>> string_to_delta('1w')

1097

>>> string_to_delta(u'1w')

1595

1098

datetime.timedelta(7)

1596

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

1099

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

1597

1100

datetime.timedelta(0, 330)

1598

1101

"""

1599

1102

timevalue = datetime.timedelta(0)

1601

1104

try:

1602

1105

suffix = unicode(s[-1])

1603

1106

value = int(s[:-1])

1604

if suffix == "d":

1107

if suffix == u"d":

1605

1108

delta = datetime.timedelta(value)

1606

elif suffix == "s":

1109

elif suffix == u"s":

1607

1110

delta = datetime.timedelta(0, value)

1608

elif suffix == "m":

1111

elif suffix == u"m":

1609

1112

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

1610

elif suffix == "h":

1113

elif suffix == u"h":

1611

1114

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

1612

elif suffix == "w":

1115

elif suffix == u"w":

1613

1116

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

1614

1117

else:

1615

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

1616

except (ValueError, IndexError), e:

1617

raise ValueError(*(e.args))

1118

raise ValueError

1119

except (ValueError, IndexError):

1120

raise ValueError

1618

1121

timevalue += delta

1619

1122

return timevalue

1620

1123

1626

1129

global if_nametoindex

1627

1130

try:

1628

1131

if_nametoindex = (ctypes.cdll.LoadLibrary

1629

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

1132

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

1630

1133

.if_nametoindex)

1631

1134

except (OSError, AttributeError):

1632

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

1135

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

1633

1136

def if_nametoindex(interface):

1634

1137

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

1635

1138

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

1636

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

1139

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

1637

1140

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1638

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

1141

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

1639

1142

interface))

1640

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

1143

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

1641

1144

ifreq[16:20])[0]

1642

1145

return interface_index

1643

1146

return if_nametoindex(interface)

1651

1154

sys.exit()

1652

1155

os.setsid()

1653

1156

if not nochdir:

1654

os.chdir("/")

1157

os.chdir(u"/")

1655

1158

if os.fork():

1656

1159

sys.exit()

1657

1160

if not noclose:

1659

1162

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

1660

1163

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

1661

1164

raise OSError(errno.ENODEV,

1662

"%s not a character device"

1663

% os.path.devnull)

1165

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

1664

1166

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

1665

1167

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

1666

1168

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

1670

1172

1671

1173

def main():

1672

1174

1673

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

1175

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

1674

1176

# Parsing of options, both command line and config file

1675

1177

1676

1178

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

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")

1179

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

1180

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

1181

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

1182

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

1183

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

1184

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

1185

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

1186

help=u"Run self-test")

1187

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

1188

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

1189

u" terminal")

1190

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

1191

u" priority string (see GnuTLS documentation)")

1192

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

1193

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

1194

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

1195

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

1196

help=u"Directory to search for configuration"

1197

u" files")

1198

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

1199

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

1200

u" system bus interface")

1201

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

1202

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

1703

1203

options = parser.parse_args()[0]

1704

1204

1705

1205

if options.check:

1708

1208

sys.exit()

1709

1209

1710

1210

# Default values for config file for server-global settings

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": "",

1211

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

1212

u"address": u"",

1213

u"port": u"",

1214

u"debug": u"False",

1215

u"priority":

1216

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

1217

u"servicename": u"Mandos",

1218

u"use_dbus": u"True",

1219

u"use_ipv6": u"True",

1721

1220

}

1722

1221

1723

1222

# Parse config file for server-global settings

1724

1223

server_config = configparser.SafeConfigParser(server_defaults)

1725

1224

del server_defaults

1726

1225

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

1727

"mandos.conf"))

1226

u"mandos.conf"))

1728

1227

# Convert the SafeConfigParser object to a dict

1729

1228

server_settings = server_config.defaults()

1730

1229

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

1731

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

1732

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

1230

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

1231

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

1733

1232

option)

1734

1233

if server_settings["port"]:

1735

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

1736

"port")

1234

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

1235

u"port")

1737

1236

del server_config

1738

1237

1739

1238

# Override the settings from the config file with command line

1740

1239

# options, if set.

1741

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

1742

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

1743

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

1240

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

1241

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

1242

u"use_dbus", u"use_ipv6"):

1744

1243

value = getattr(options, option)

1745

1244

if value is not None:

1746

1245

server_settings[option] = value

1754

1253

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

1755

1254

1756

1255

# For convenience

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":

1256

debug = server_settings[u"debug"]

1257

use_dbus = server_settings[u"use_dbus"]

1258

use_ipv6 = server_settings[u"use_ipv6"]

1259

1260

if not debug:

1261

syslogger.setLevel(logging.WARNING)

1262

console.setLevel(logging.WARNING)

1263

1264

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

1763

1265

syslogger.setFormatter(logging.Formatter

1764

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

1765

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

1766

% server_settings["servicename"]))

1266

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

1267

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

1268

% server_settings[u"servicename"]))

1767

1269

1768

1270

# Parse config file with clients

1769

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

1770

"interval": "5m",

1771

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

1772

"host": "",

1773

"approval_delay": "0s",

1774

"approval_duration": "1s",

1271

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

1272

u"interval": u"5m",

1273

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

1274

u"host": u"",

1775

1275

}

1776

1276

client_config = configparser.SafeConfigParser(client_defaults)

1777

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

1778

"clients.conf"))

1277

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

1278

u"clients.conf"))

1779

1279

1780

1280

global mandos_dbus_service

1781

1281

mandos_dbus_service = None

1782

1282

1783

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

1784

server_settings["port"]),

1283

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

1284

server_settings[u"port"]),

1785

1285

ClientHandler,

1786

interface=(server_settings["interface"]

1787

or None),

1286

interface=server_settings[u"interface"],

1788

1287

use_ipv6=use_ipv6,

1789

1288

gnutls_priority=

1790

server_settings["priority"],

1289

server_settings[u"priority"],

1791

1290

use_dbus=use_dbus)

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)

1291

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

1292

try:

1293

pidfile = open(pidfilename, u"w")

1294

except IOError:

1295

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

1798

1296

1799

1297

try:

1800

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

1801

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

1298

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

1299

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

1802

1300

except KeyError:

1803

1301

try:

1804

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

1805

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

1302

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

1303

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

1806

1304

except KeyError:

1807

1305

try:

1808

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

1809

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

1306

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

1307

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

1810

1308

except KeyError:

1811

1309

uid = 65534

1812

1310

gid = 65534

1817

1315

if error[0] != errno.EPERM:

1818

1316

raise error

1819

1317

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

1318

# Enable all possible GnuTLS debugging

1828

1319

if debug:

1829

# Enable all possible GnuTLS debugging

1830

1831

1320

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

1832

1321

# - GnuTLS manual

1833

1322

gnutls.library.functions.gnutls_global_set_log_level(11)

1834

1323

1835

1324

@gnutls.library.types.gnutls_log_func

1836

1325

def debug_gnutls(level, string):

1837

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

1326

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

1838

1327

1839

1328

(gnutls.library.functions

1840

1329

.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()

1855

1330

1856

1331

global main_loop

1857

1332

# From the Avahi example code

1860

1335

bus = dbus.SystemBus()

1861

1336

# End of Avahi example code

1862

1337

if use_dbus:

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

1338

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

1871

1339

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1872

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

1873

servicetype = "_mandos._tcp",

1340

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

1341

servicetype = u"_mandos._tcp",

1874

1342

protocol = protocol, bus = bus)

1875

1343

if server_settings["interface"]:

1876

1344

service.interface = (if_nametoindex

1877

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

1878

1879

global multiprocessing_manager

1880

multiprocessing_manager = multiprocessing.Manager()

1345

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

1881

1346

1882

1347

client_class = Client

1883

1348

if use_dbus:

1884

1349

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

1897

1350

tcp_server.clients.update(set(

1898

1351

client_class(name = section,

1899

config= dict(client_config_items(

1900

client_config, section)))

1352

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

1901

1353

for section in client_config.sections()))

1902

1354

if not tcp_server.clients:

1903

logger.warning("No clients defined")

1355

logger.warning(u"No clients defined")

1356

1357

if debug:

1358

# Redirect stdin so all checkers get /dev/null

1359

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

1360

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

1361

if null > 2:

1362

os.close(null)

1363

else:

1364

# No console logging

1365

logger.removeHandler(console)

1366

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

1367

daemon()

1368

1369

try:

1370

with closing(pidfile):

1371

pid = os.getpid()

1372

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

1373

del pidfile

1374

except IOError:

1375

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

1376

pidfilename, pid)

1377

except NameError:

1378

# "pidfile" was never created

1379

pass

1380

del pidfilename

1381

1382

def cleanup():

1383

"Cleanup function; run on exit"

1384

service.cleanup()

1904

1385

1386

while tcp_server.clients:

1387

client = tcp_server.clients.pop()

1388

client.disable_hook = None

1389

client.disable()

1390

1391

atexit.register(cleanup)

1392

1905

1393

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

1919

1394

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

1920

1921

1395

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

1922

1396

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

1923

1397

1925

1399

class MandosDBusService(dbus.service.Object):

1926

1400

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

1927

1401

def __init__(self):

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")

1402

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

1403

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

1404

1405

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

1406

def ClientAdded(self, objpath, properties):

1407

"D-Bus signal"

1408

pass

1409

1410

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

1411

def ClientNotFound(self, fingerprint):

1412

"D-Bus signal"

1413

pass

1414

1415

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

1942

1416

def ClientRemoved(self, objpath, name):

1943

1417

"D-Bus signal"

1944

1418

pass

1945

1419

1946

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

1420

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

1947

1421

def GetAllClients(self):

1948

1422

"D-Bus method"

1949

1423

return dbus.Array(c.dbus_object_path

1950

1424

for c in tcp_server.clients)

1951

1425

1952

1426

@dbus.service.method(_interface,

1953

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

1427

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

1954

1428

def GetAllClientsWithProperties(self):

1955

1429

"D-Bus method"

1956

1430

return dbus.Dictionary(

1957

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

1431

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

1958

1432

for c in tcp_server.clients),

1959

signature="oa{sv}")

1433

signature=u"oa{sv}")

1960

1434

1961

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

1435

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

1962

1436

def RemoveClient(self, object_path):

1963

1437

"D-Bus method"

1964

1438

for c in tcp_server.clients:

1966

1440

tcp_server.clients.remove(c)

1967

1441

c.remove_from_connection()

1968

1442

# Don't signal anything except ClientRemoved

1969

c.disable(quiet=True)

1443

c.disable(signal=False)

1970

1444

# Emit D-Bus signal

1971

1445

self.ClientRemoved(object_path, c.name)

1972

1446

return

1973

raise KeyError(object_path)

1447

raise KeyError

1974

1448

1975

1449

del _interface

1976

1450

1977

1451

mandos_dbus_service = MandosDBusService()

1978

1452

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

1997

1453

for client in tcp_server.clients:

1998

1454

if use_dbus:

1999

1455

# Emit D-Bus signal

2000

mandos_dbus_service.ClientAdded(client.dbus_object_path)

1456

mandos_dbus_service.ClientAdded(client.dbus_object_path,

1457

client.GetAllProperties())

2001

1458

client.enable()

2002

1459

2003

1460

tcp_server.enable()

2006

1463

# Find out what port we got

2007

1464

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

2008

1465

if use_ipv6:

2009

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

1466

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

2010

1467

" flowinfo %d, scope_id %d"

2011

1468

% tcp_server.socket.getsockname())

2012

1469

else: # IPv4

2013

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

1470

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

2014

1471

% tcp_server.socket.getsockname())

2015

1472

2016

1473

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

2020

1477

try:

2021

1478

service.activate()

2022

1479

except dbus.exceptions.DBusException, error:

2023

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

2024

cleanup()

1480

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

2025

1481

sys.exit(1)

2026

1482

# End of Avahi example code

2027

1483

2030

1486

(tcp_server.handle_request

2031

1487

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

2032

1488

2033

logger.debug("Starting main loop")

1489

logger.debug(u"Starting main loop")

2034

1490

main_loop.run()

2035

1491

except AvahiError, error:

2036

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

2037

cleanup()

1492

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

2038

1493

sys.exit(1)

2039

1494

except KeyboardInterrupt:

2040

1495

if debug:

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()

1496

print >> sys.stderr

1497

logger.debug(u"Server received KeyboardInterrupt")

1498

logger.debug(u"Server exiting")

2046

1499

2047

1500

if __name__ == '__main__':

2048

1501

main()