/mandos/trunk : revision 474

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

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#

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# Everything else is

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#

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

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

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

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#

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from __future__ import division, with_statement, absolute_import

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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import socket

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import optparse

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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SO_BINDTODEVICE = None

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version = "1.0.14"

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version = "1.3.0"

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#logger = logging.getLogger(u'mandos')

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logger = logging.Logger(u'mandos')

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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

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syslogger.setFormatter(logging.Formatter

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

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u' %(message)s'))

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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u' %(levelname)s:'

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u' %(message)s'))

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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Attributes:

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

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Used to optionally bind to the specified interface.

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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"""

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

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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u" after %i retries, exiting.",

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError(u"Too many renames")

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raise AvahiServiceError("Too many renames")

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

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

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException, error:

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

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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self.group.connect_to_signal('StateChanged',

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self

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.entry_group_state_changed)

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

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

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self.name, self.type)

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self.group.AddService(

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self.interface,

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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

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logger.debug("Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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

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unicode(error))

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raise AvahiGroupError(u"State changed: %s"

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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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(u"Avahi server state change: %i", state)

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

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if state == avahi.SERVER_COLLISION:

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

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logger.error("Zeroconf server name collision")

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self.remove()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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self.bus.get_object(avahi.DBUS_NAME,

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avahi.DBUS_PATH_SERVER),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal(u"StateChanged",

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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

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

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

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Attributes:

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D-Bus identifiers

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

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

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

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

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to see if the client lives.

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'None' if no process is running.

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checker_callback_tag: a gobject event source tag, or None

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checker_command: string; External command which is run to check

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if client lives. %() expansions are done at

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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uniquely identify the client

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

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host: string; available for use by the checker command

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

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

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

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

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last_enabled: datetime.datetime(); (UTC)

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enabled: bool()

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

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D-Bus identifiers

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

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

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until this client is disabled

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

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

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

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to see if the client lives.

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'None' if no process is running.

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checker_initiator_tag: a gobject event source tag, or None

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disable_initiator_tag: - '' -

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checker_callback_tag: - '' -

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

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client lives. %() expansions are done at

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

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

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current_checker_command: string; current running checker_command

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

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

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

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runtime_expansions: Allowed attributes for runtime expansion.

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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self.name = name

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if config is None:

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config = {}

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

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

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

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

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

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if u"secret" in config:

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

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elif u"secfile" in config:

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

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.replace(" ", ""))

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

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if "secret" in config:

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

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elif "secfile" in config:

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

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(config[u"secfile"])),

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(config["secfile"])),

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"rb") as secfile:

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self.secret = secfile.read()

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else:

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

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

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% self.name)

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

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

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self.created = datetime.datetime.utcnow()

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self.enabled = False

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self.last_approval_request = None

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self.last_enabled = None

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self.last_checked_ok = None

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

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

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

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

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self.disable_hook = disable_hook

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

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self.checker_callback_tag = None

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self.checker_command = config[u"checker"]

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self.checker_command = config["checker"]

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self.current_checker_command = None

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self.last_connect = None

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self._approved = None

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

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

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True)

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self.approvals_pending = 0

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self.approval_delay = string_to_delta(

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config[u"approval_delay"])

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config["approval_delay"])

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self.approval_duration = string_to_delta(

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config[u"approval_duration"])

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config["approval_duration"])

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

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def send_changedstate(self):

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def enable(self):

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

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

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

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# Already enabled

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return

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self.send_changedstate()

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if not quiet:

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self.send_changedstate()

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if not quiet:

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

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

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

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

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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

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

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = None

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self.stop_checker()

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if os.WIFEXITED(condition):

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exitstatus = os.WEXITSTATUS(condition)

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if exitstatus == 0:

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

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

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vars(self))

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self.checked_ok()

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else:

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

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

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vars(self))

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else:

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

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

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vars(self))

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def checked_ok(self):

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(self.timeout_milliseconds(),

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self.disable))

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def need_approval(self):

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self.last_approval_request = datetime.datetime.utcnow()

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def start_checker(self):

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

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raise error

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else:

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if pid:

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

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logger.warning("Checker was a zombie")

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback(pid, status,

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self.current_checker_command)

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command = self.checker_command % self.host

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except TypeError:

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# Escape attributes for the shell

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escaped_attrs = dict((key,

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re.escape(unicode(str(val),

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errors=

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u'replace')))

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for key, val in

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vars(self).iteritems())

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escaped_attrs = dict(

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(attr,

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

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errors=

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'replace')))

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for attr in

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self.runtime_expansions)

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try:

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command = self.checker_command % escaped_attrs

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except TypeError, error:

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

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

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

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' %s', self.checker_command, error)

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return True # Try again later

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self.current_checker_command = command

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try:

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

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

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command, self.name)

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

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

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# always replaced by /dev/null.)

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self.checker = subprocess.Popen(command,

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close_fds=True,

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shell=True, cwd=u"/")

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shell=True, cwd="/")

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self.checker_callback_tag = (gobject.child_watch_add

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(self.checker.pid,

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self.checker_callback,

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback(pid, status, command)

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except OSError, error:

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

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

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error)

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

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return True

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if self.checker_callback_tag:

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback_tag = None

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

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

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return

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

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

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try:

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

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#time.sleep(0.5)

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raise

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self.checker = None

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

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

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def dbus_service_property(dbus_interface, signature="v",

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access="readwrite", byte_arrays=False):

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"""Decorators for marking methods of a DBusObjectWithProperties to

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become properties on the D-Bus.

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"""

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

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

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if byte_arrays and signature != u"ay":

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

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u" signature %r" % signature)

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if byte_arrays and signature != "ay":

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

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" signature %r" % signature)

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541

def decorator(func):

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func._dbus_is_property = True

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func._dbus_interface = dbus_interface

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func._dbus_signature = signature

531

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func._dbus_access = access

532

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func._dbus_name = func.__name__

533

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

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

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

535

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

549

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

536

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return func

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return decorator

538

552

566

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581

@staticmethod

568

582

def _is_dbus_property(obj):

569

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

583

return getattr(obj, "_dbus_is_property", False)

570

584

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def _get_all_dbus_properties(self):

572

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

580

594

property with the specified name and interface.

581

595

"""

582

596

for name in (property_name,

583

property_name + u"_dbus_property"):

597

property_name + "_dbus_property"):

584

598

prop = getattr(self, name, None)

585

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if (prop is None

586

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or not self._is_dbus_property(prop)

590

604

continue

591

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return prop

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# No such property

593

raise DBusPropertyNotFound(self.dbus_object_path + u":"

594

+ interface_name + u"."

607

raise DBusPropertyNotFound(self.dbus_object_path + ":"

608

+ interface_name + "."

595

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+ property_name)

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610

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

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out_signature=u"v")

611

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

612

out_signature="v")

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def Get(self, interface_name, property_name):

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614

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

601

615

"""

602

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prop = self._get_dbus_property(interface_name, property_name)

603

if prop._dbus_access == u"write":

617

if prop._dbus_access == "write":

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raise DBusPropertyAccessException(property_name)

605

619

value = prop()

606

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

620

if not hasattr(value, "variant_level"):

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621

return value

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622

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

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623

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

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

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

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

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627

"""

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prop = self._get_dbus_property(interface_name, property_name)

615

if prop._dbus_access == u"read":

629

if prop._dbus_access == "read":

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630

raise DBusPropertyAccessException(property_name)

617

if prop._dbus_get_args_options[u"byte_arrays"]:

631

if prop._dbus_get_args_options["byte_arrays"]:

618

632

# The byte_arrays option is not supported yet on

619

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# signatures other than "ay".

620

if prop._dbus_signature != u"ay":

634

if prop._dbus_signature != "ay":

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raise ValueError

622

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

623

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for byte in value))

624

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prop(value)

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626

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

627

out_signature=u"a{sv}")

640

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

641

out_signature="a{sv}")

628

642

def GetAll(self, interface_name):

629

643

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

630

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standard.

638

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# Interface non-empty but did not match

639

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continue

640

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# Ignore write-only properties

641

if prop._dbus_access == u"write":

655

if prop._dbus_access == "write":

642

656

continue

643

657

value = prop()

644

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

658

if not hasattr(value, "variant_level"):

645

659

all[name] = value

646

660

continue

647

661

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

648

662

value.variant_level+1)

649

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

663

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

650

664

651

665

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

652

out_signature=u"s",

666

out_signature="s",

653

667

path_keyword='object_path',

654

668

connection_keyword='connection')

655

669

def Introspect(self, object_path, connection):

660

674

try:

661

675

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

662

676

def make_tag(document, name, prop):

663

e = document.createElement(u"property")

664

e.setAttribute(u"name", name)

665

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

666

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

677

e = document.createElement("property")

678

e.setAttribute("name", name)

679

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

680

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

667

681

return e

668

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

682

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

669

683

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

670

684

for name, prop

671

685

in self._get_all_dbus_properties()

672

686

if prop._dbus_interface

673

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

687

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

674

688

if_tag.appendChild(tag)

675

689

# Add the names to the return values for the

676

690

# "org.freedesktop.DBus.Properties" methods

677

if (if_tag.getAttribute(u"name")

678

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

679

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

680

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

681

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

682

if (arg.getAttribute(u"direction")

683

== u"out"):

684

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

685

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

686

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

687

if (arg.getAttribute(u"direction")

688

== u"out"):

689

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

690

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

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")

691

705

document.unlink()

692

706

except (AttributeError, xml.dom.DOMException,

693

707

xml.parsers.expat.ExpatError), error:

694

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

708

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

695

709

error)

696

710

return xmlstring

697

711

703

717

dbus_object_path: dbus.ObjectPath

704

718

bus: dbus.SystemBus()

705

719

"""

720

721

runtime_expansions = (Client.runtime_expansions

722

+ ("dbus_object_path",))

723

706

724

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

707

725

708

726

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

711

729

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

712

730

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

713

731

# the D-Bus

732

client_object_name = unicode(self.name).translate(

733

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

734

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

714

735

self.dbus_object_path = (dbus.ObjectPath

715

(u"/clients/"

716

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

736

("/clients/" + client_object_name))

717

737

DBusObjectWithProperties.__init__(self, self.bus,

718

738

self.dbus_object_path)

719

739

726

746

if (hasattr(self, "dbus_object_path")

727

747

and bval is not bool(old_value)):

728

748

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

729

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

749

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

730

750

dbus_bool)

731

751

732

752

approvals_pending = property(_get_approvals_pending,

740

760

variant_level=variant_level)

741

761

742

762

def enable(self):

743

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

763

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

744

764

r = Client.enable(self)

745

765

if oldstate != self.enabled:

746

766

# Emit D-Bus signals

747

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

767

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

748

768

dbus.Boolean(True, variant_level=1))

749

769

self.PropertyChanged(

750

dbus.String(u"LastEnabled"),

770

dbus.String("LastEnabled"),

751

771

self._datetime_to_dbus(self.last_enabled,

752

772

variant_level=1))

753

773

return r

754

774

755

775

def disable(self, quiet = False):

756

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

776

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

757

777

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

758

778

if not quiet and oldstate != self.enabled:

759

779

# Emit D-Bus signal

760

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

780

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

761

781

dbus.Boolean(False, variant_level=1))

762

782

return r

763

783

766

786

self.remove_from_connection()

767

787

except LookupError:

768

788

pass

769

if hasattr(DBusObjectWithProperties, u"__del__"):

789

if hasattr(DBusObjectWithProperties, "__del__"):

770

790

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

771

791

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

772

792

775

795

self.checker_callback_tag = None

776

796

self.checker = None

777

797

# Emit D-Bus signal

778

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

798

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

779

799

dbus.Boolean(False, variant_level=1))

780

800

if os.WIFEXITED(condition):

781

801

exitstatus = os.WEXITSTATUS(condition)

796

816

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

797

817

# Emit D-Bus signal

798

818

self.PropertyChanged(

799

dbus.String(u"LastCheckedOK"),

819

dbus.String("LastCheckedOK"),

800

820

(self._datetime_to_dbus(self.last_checked_ok,

801

821

variant_level=1)))

802

822

return r

803

823

824

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

825

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

826

# Emit D-Bus signal

827

self.PropertyChanged(

828

dbus.String("LastApprovalRequest"),

829

(self._datetime_to_dbus(self.last_approval_request,

830

variant_level=1)))

831

return r

832

804

833

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

805

834

old_checker = self.checker

806

835

if self.checker is not None:

814

843

# Emit D-Bus signal

815

844

self.CheckerStarted(self.current_checker_command)

816

845

self.PropertyChanged(

817

dbus.String(u"CheckerRunning"),

846

dbus.String("CheckerRunning"),

818

847

dbus.Boolean(True, variant_level=1))

819

848

return r

820

849

821

850

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

822

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

851

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

823

852

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

824

853

if (old_checker is not None

825

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

826

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

854

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

855

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

827

856

dbus.Boolean(False, variant_level=1))

828

857

return r

829

858

840

869

841

870

842

871

## D-Bus methods, signals & properties

843

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

872

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

844

873

845

874

## Signals

846

875

847

876

# CheckerCompleted - signal

848

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

877

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

849

878

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

850

879

"D-Bus signal"

851

880

pass

852

881

853

882

# CheckerStarted - signal

854

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

883

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

855

884

def CheckerStarted(self, command):

856

885

"D-Bus signal"

857

886

pass

858

887

859

888

# PropertyChanged - signal

860

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

889

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

861

890

def PropertyChanged(self, property, value):

862

891

"D-Bus signal"

863

892

pass

872

901

pass

873

902

874

903

# Rejected - signal

875

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

904

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

876

905

def Rejected(self, reason):

877

906

"D-Bus signal"

878

907

pass

879

908

880

909

# NeedApproval - signal

881

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

910

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

882

911

def NeedApproval(self, timeout, default):

883

912

"D-Bus signal"

884

pass

913

return self.need_approval()

885

914

886

915

## Methods

887

916

888

917

# Approve - method

889

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

918

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

890

919

def Approve(self, value):

891

920

self.approve(value)

892

921

893

922

# CheckedOK - method

894

923

@dbus.service.method(_interface)

895

924

def CheckedOK(self):

921

950

## Properties

922

951

923

952

# ApprovalPending - property

924

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

953

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

925

954

def ApprovalPending_dbus_property(self):

926

955

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

927

956

928

957

# ApprovedByDefault - property

929

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

930

access=u"readwrite")

958

@dbus_service_property(_interface, signature="b",

959

access="readwrite")

931

960

def ApprovedByDefault_dbus_property(self, value=None):

932

961

if value is None: # get

933

962

return dbus.Boolean(self.approved_by_default)

934

963

self.approved_by_default = bool(value)

935

964

# Emit D-Bus signal

936

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

965

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

937

966

dbus.Boolean(value, variant_level=1))

938

967

939

968

# ApprovalDelay - property

940

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

941

access=u"readwrite")

969

@dbus_service_property(_interface, signature="t",

970

access="readwrite")

942

971

def ApprovalDelay_dbus_property(self, value=None):

943

972

if value is None: # get

944

973

return dbus.UInt64(self.approval_delay_milliseconds())

945

974

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

946

975

# Emit D-Bus signal

947

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

976

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

948

977

dbus.UInt64(value, variant_level=1))

949

978

950

979

# ApprovalDuration - property

951

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

952

access=u"readwrite")

980

@dbus_service_property(_interface, signature="t",

981

access="readwrite")

953

982

def ApprovalDuration_dbus_property(self, value=None):

954

983

if value is None: # get

955

984

return dbus.UInt64(self._timedelta_to_milliseconds(

956

985

self.approval_duration))

957

986

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

958

987

# Emit D-Bus signal

959

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

988

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

960

989

dbus.UInt64(value, variant_level=1))

961

990

962

991

# Name - property

963

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

992

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

964

993

def Name_dbus_property(self):

965

994

return dbus.String(self.name)

966

995

967

996

# Fingerprint - property

968

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

997

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

969

998

def Fingerprint_dbus_property(self):

970

999

return dbus.String(self.fingerprint)

971

1000

972

1001

# Host - property

973

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

974

access=u"readwrite")

1002

@dbus_service_property(_interface, signature="s",

1003

access="readwrite")

975

1004

def Host_dbus_property(self, value=None):

976

1005

if value is None: # get

977

1006

return dbus.String(self.host)

978

1007

self.host = value

979

1008

# Emit D-Bus signal

980

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

1009

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

981

1010

dbus.String(value, variant_level=1))

982

1011

983

1012

# Created - property

984

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

1013

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

985

1014

def Created_dbus_property(self):

986

1015

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

987

1016

988

1017

# LastEnabled - property

989

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

1018

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

990

1019

def LastEnabled_dbus_property(self):

991

1020

if self.last_enabled is None:

992

return dbus.String(u"")

1021

return dbus.String("")

993

1022

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

994

1023

995

1024

# Enabled - property

996

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

997

access=u"readwrite")

1025

@dbus_service_property(_interface, signature="b",

1026

access="readwrite")

998

1027

def Enabled_dbus_property(self, value=None):

999

1028

if value is None: # get

1000

1029

return dbus.Boolean(self.enabled)

1004

1033

self.disable()

1005

1034

1006

1035

# LastCheckedOK - property

1007

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

1008

access=u"readwrite")

1036

@dbus_service_property(_interface, signature="s",

1037

access="readwrite")

1009

1038

def LastCheckedOK_dbus_property(self, value=None):

1010

1039

if value is not None:

1011

1040

self.checked_ok()

1012

1041

return

1013

1042

if self.last_checked_ok is None:

1014

return dbus.String(u"")

1043

return dbus.String("")

1015

1044

return dbus.String(self._datetime_to_dbus(self

1016

1045

.last_checked_ok))

1017

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

1018

1056

# Timeout - property

1019

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

1020

access=u"readwrite")

1057

@dbus_service_property(_interface, signature="t",

1058

access="readwrite")

1021

1059

def Timeout_dbus_property(self, value=None):

1022

1060

if value is None: # get

1023

1061

return dbus.UInt64(self.timeout_milliseconds())

1024

1062

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

1025

1063

# Emit D-Bus signal

1026

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

1064

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

1027

1065

dbus.UInt64(value, variant_level=1))

1028

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

1066

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

1029

1067

return

1030

1068

# Reschedule timeout

1031

1069

gobject.source_remove(self.disable_initiator_tag)

1044

1082

(time_to_die, self.disable))

1045

1083

1046

1084

# Interval - property

1047

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

1048

access=u"readwrite")

1085

@dbus_service_property(_interface, signature="t",

1086

access="readwrite")

1049

1087

def Interval_dbus_property(self, value=None):

1050

1088

if value is None: # get

1051

1089

return dbus.UInt64(self.interval_milliseconds())

1052

1090

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

1053

1091

# Emit D-Bus signal

1054

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

1092

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

1055

1093

dbus.UInt64(value, variant_level=1))

1056

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

1094

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

1057

1095

return

1058

1096

# Reschedule checker run

1059

1097

gobject.source_remove(self.checker_initiator_tag)

1062

1100

self.start_checker() # Start one now, too

1063

1101

1064

1102

# Checker - property

1065

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

1066

access=u"readwrite")

1103

@dbus_service_property(_interface, signature="s",

1104

access="readwrite")

1067

1105

def Checker_dbus_property(self, value=None):

1068

1106

if value is None: # get

1069

1107

return dbus.String(self.checker_command)

1070

1108

self.checker_command = value

1071

1109

# Emit D-Bus signal

1072

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

1110

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

1073

1111

dbus.String(self.checker_command,

1074

1112

variant_level=1))

1075

1113

1076

1114

# CheckerRunning - property

1077

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

1078

access=u"readwrite")

1115

@dbus_service_property(_interface, signature="b",

1116

access="readwrite")

1079

1117

def CheckerRunning_dbus_property(self, value=None):

1080

1118

if value is None: # get

1081

1119

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

1085

1123

self.stop_checker()

1086

1124

1087

1125

# ObjectPath - property

1088

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

1126

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

1089

1127

def ObjectPath_dbus_property(self):

1090

1128

return self.dbus_object_path # is already a dbus.ObjectPath

1091

1129

1092

1130

# Secret = property

1093

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

1094

access=u"write", byte_arrays=True)

1131

@dbus_service_property(_interface, signature="ay",

1132

access="write", byte_arrays=True)

1095

1133

def Secret_dbus_property(self, value):

1096

1134

self.secret = str(value)

1097

1135

1132

1170

1133

1171

def handle(self):

1134

1172

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

1135

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

1173

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

1136

1174

unicode(self.client_address))

1137

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

1175

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

1138

1176

self.server.child_pipe.fileno())

1139

1177

1140

1178

session = (gnutls.connection

1147

1185

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

1148

1186

# here despite using OpenPGP certificates.

1149

1187

1150

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

1151

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

1152

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

1153

# u"+DHE-DSS"))

1188

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

1189

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

1190

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

1191

# "+DHE-DSS"))

1154

1192

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

1155

1193

priority = self.server.gnutls_priority

1156

1194

if priority is None:

1157

priority = u"NORMAL"

1195

priority = "NORMAL"

1158

1196

(gnutls.library.functions

1159

1197

.gnutls_priority_set_direct(session._c_object,

1160

1198

priority, None))

1162

1200

# Start communication using the Mandos protocol

1163

1201

# Get protocol number

1164

1202

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

1165

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

1203

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

1166

1204

try:

1167

1205

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

1168

1206

raise RuntimeError

1169

1207

except (ValueError, IndexError, RuntimeError), error:

1170

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

1208

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

1171

1209

return

1172

1210

1173

1211

# Start GnuTLS connection

1174

1212

try:

1175

1213

session.handshake()

1176

1214

except gnutls.errors.GNUTLSError, error:

1177

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

1215

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

1178

1216

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

1179

1217

# established. Just abandon the request.

1180

1218

return

1181

logger.debug(u"Handshake succeeded")

1219

logger.debug("Handshake succeeded")

1182

1220

1183

1221

approval_required = False

1184

1222

try:

1186

1224

fpr = self.fingerprint(self.peer_certificate

1187

1225

(session))

1188

1226

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

1189

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

1227

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

1190

1228

return

1191

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

1229

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

1192

1230

1193

1231

try:

1194

1232

client = ProxyClient(child_pipe, fpr,

1203

1241

1204

1242

while True:

1205

1243

if not client.enabled:

1206

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

1244

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

1207

1245

client.name)

1208

1246

if self.server.use_dbus:

1209

1247

# Emit D-Bus signal

1214

1252

#We are approved or approval is disabled

1215

1253

break

1216

1254

elif client._approved is None:

1217

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

1255

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

1218

1256

client.name)

1219

1257

if self.server.use_dbus:

1220

1258

# Emit D-Bus signal

1222

1260

client.approval_delay_milliseconds(),

1223

1261

client.approved_by_default)

1224

1262

else:

1225

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

1263

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

1226

1264

client.name)

1227

1265

if self.server.use_dbus:

1228

1266

# Emit D-Bus signal

1243

1281

client.name)

1244

1282

if self.server.use_dbus:

1245

1283

# Emit D-Bus signal

1246

client.Rejected("Timed out")

1284

client.Rejected("Approval timed out")

1247

1285

return

1248

1286

else:

1249

1287

break

1257

1295

except (gnutls.errors.GNUTLSError), error:

1258

1296

logger.warning("gnutls send failed")

1259

1297

return

1260

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

1298

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

1261

1299

sent, len(client.secret)

1262

1300

- (sent_size + sent))

1263

1301

sent_size += sent

1264

1302

1265

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

1303

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

1266

1304

# bump the timeout as if seen

1267

1305

client.checked_ok()

1268

1306

if self.server.use_dbus:

1291

1329

.gnutls_certificate_get_peers

1292

1330

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

1293

1331

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

1294

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

1295

u" certificate")

1332

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

1333

" certificate")

1296

1334

if list_size.value == 0:

1297

1335

return None

1298

1336

cert = cert_list[0]

1324

1362

if crtverify.value != 0:

1325

1363

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1326

1364

raise (gnutls.errors.CertificateSecurityError

1327

(u"Verify failed"))

1365

("Verify failed"))

1328

1366

# New buffer for the fingerprint

1329

1367

buf = ctypes.create_string_buffer(20)

1330

1368

buf_len = ctypes.c_size_t()

1337

1375

# Convert the buffer to a Python bytestring

1338

1376

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

1339

1377

# Convert the bytestring to hexadecimal notation

1340

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

1378

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

1341

1379

return hex_fpr

1342

1380

1343

1381

1371

1409

1372

1410

def add_pipe(self, parent_pipe):

1373

1411

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

1374

pass

1412

raise NotImplementedError

1375

1413

1376

1414

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1377

1415

socketserver.TCPServer, object):

1395

1433

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

1396

1434

if self.interface is not None:

1397

1435

if SO_BINDTODEVICE is None:

1398

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

1399

u" cannot bind to interface %s",

1436

logger.error("SO_BINDTODEVICE does not exist;"

1437

" cannot bind to interface %s",

1400

1438

self.interface)

1401

1439

else:

1402

1440

try:

1403

1441

self.socket.setsockopt(socket.SOL_SOCKET,

1404

1442

SO_BINDTODEVICE,

1405

1443

str(self.interface

1406

+ u'\0'))

1444

+ '\0'))

1407

1445

except socket.error, error:

1408

1446

if error[0] == errno.EPERM:

1409

logger.error(u"No permission to"

1410

u" bind to interface %s",

1447

logger.error("No permission to"

1448

" bind to interface %s",

1411

1449

self.interface)

1412

1450

elif error[0] == errno.ENOPROTOOPT:

1413

logger.error(u"SO_BINDTODEVICE not available;"

1414

u" cannot bind to interface %s",

1451

logger.error("SO_BINDTODEVICE not available;"

1452

" cannot bind to interface %s",

1415

1453

self.interface)

1416

1454

else:

1417

1455

raise

1419

1457

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

1420

1458

if not self.server_address[0]:

1421

1459

if self.address_family == socket.AF_INET6:

1422

any_address = u"::" # in6addr_any

1460

any_address = "::" # in6addr_any

1423

1461

else:

1424

1462

any_address = socket.INADDR_ANY

1425

1463

self.server_address = (any_address,

1474

1512

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

1475

1513

client_object=None):

1476

1514

condition_names = {

1477

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

1478

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

1515

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

1516

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

1479

1517

# blocking).

1480

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

1481

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

1482

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

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

1483

1521

# broken, usually for pipes and

1484

1522

# sockets).

1485

1523

}

1487

1525

for cond, name in

1488

1526

condition_names.iteritems()

1489

1527

if cond & condition)

1490

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

1491

conditions_string)

1492

1493

1528

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

1494

1529

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

1495

1530

return False

1496

1531

1497

1532

# Read a request from the child

1498

1533

request = parent_pipe.recv()

1499

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

1500

1534

command = request[0]

1501

1535

1502

1536

if command == 'init':

1508

1542

client = c

1509

1543

break

1510

1544

else:

1511

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

1512

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

1545

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

1546

"dress: %s", fpr, address)

1513

1547

if self.use_dbus:

1514

1548

# Emit D-Bus signal

1515

mandos_dbus_service.ClientNotFound(fpr, address)

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

1516

1550

parent_pipe.send(False)

1517

1551

return False

1518

1552

1549

1583

def string_to_delta(interval):

1550

1584

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

1551

1585

1552

>>> string_to_delta(u'7d')

1586

>>> string_to_delta('7d')

1553

1587

datetime.timedelta(7)

1554

>>> string_to_delta(u'60s')

1588

>>> string_to_delta('60s')

1555

1589

datetime.timedelta(0, 60)

1556

>>> string_to_delta(u'60m')

1590

>>> string_to_delta('60m')

1557

1591

datetime.timedelta(0, 3600)

1558

>>> string_to_delta(u'24h')

1592

>>> string_to_delta('24h')

1559

1593

datetime.timedelta(1)

1560

>>> string_to_delta(u'1w')

1594

>>> string_to_delta('1w')

1561

1595

datetime.timedelta(7)

1562

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

1596

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

1563

1597

datetime.timedelta(0, 330)

1564

1598

"""

1565

1599

timevalue = datetime.timedelta(0)

1567

1601

try:

1568

1602

suffix = unicode(s[-1])

1569

1603

value = int(s[:-1])

1570

if suffix == u"d":

1604

if suffix == "d":

1571

1605

delta = datetime.timedelta(value)

1572

elif suffix == u"s":

1606

elif suffix == "s":

1573

1607

delta = datetime.timedelta(0, value)

1574

elif suffix == u"m":

1608

elif suffix == "m":

1575

1609

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

1576

elif suffix == u"h":

1610

elif suffix == "h":

1577

1611

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

1578

elif suffix == u"w":

1612

elif suffix == "w":

1579

1613

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

1580

1614

else:

1581

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

1615

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

1582

1616

except (ValueError, IndexError), e:

1583

raise ValueError(e.message)

1617

raise ValueError(*(e.args))

1584

1618

timevalue += delta

1585

1619

return timevalue

1586

1620

1592

1626

global if_nametoindex

1593

1627

try:

1594

1628

if_nametoindex = (ctypes.cdll.LoadLibrary

1595

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

1629

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

1596

1630

.if_nametoindex)

1597

1631

except (OSError, AttributeError):

1598

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

1632

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

1599

1633

def if_nametoindex(interface):

1600

1634

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

1601

1635

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

1602

1636

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

1603

1637

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1604

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

1638

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

1605

1639

interface))

1606

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

1640

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

1607

1641

ifreq[16:20])[0]

1608

1642

return interface_index

1609

1643

return if_nametoindex(interface)

1617

1651

sys.exit()

1618

1652

os.setsid()

1619

1653

if not nochdir:

1620

os.chdir(u"/")

1654

os.chdir("/")

1621

1655

if os.fork():

1622

1656

sys.exit()

1623

1657

if not noclose:

1625

1659

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

1626

1660

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

1627

1661

raise OSError(errno.ENODEV,

1628

u"%s not a character device"

1662

"%s not a character device"

1629

1663

% os.path.devnull)

1630

1664

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

1631

1665

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

1639

1673

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

1640

1674

# Parsing of options, both command line and config file

1641

1675

1642

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

1643

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

1644

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

1645

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

1646

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

1647

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

1648

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

1649

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

1650

help=u"Run self-test")

1651

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

1652

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

1653

u" terminal")

1654

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

1655

help=u"Debug level for stdout output")

1656

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

1657

u" priority string (see GnuTLS documentation)")

1658

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

1659

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

1660

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

1661

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

1662

help=u"Directory to search for configuration"

1663

u" files")

1664

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

1665

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

1666

u" system bus interface")

1667

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

1668

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

1669

options = parser.parse_args()[0]

1676

parser = argparse.ArgumentParser()

1677

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

1678

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

1679

help="show version number and exit")

1680

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

1681

help="Bind to interface IF")

1682

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

1683

help="Address to listen for requests on")

1684

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

1685

help="Port number to receive requests on")

1686

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

1687

help="Run self-test")

1688

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

1689

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

1690

" to terminal")

1691

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

1692

help="Debug level for stdout output")

1693

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

1694

" priority string (see GnuTLS documentation)")

1695

parser.add_argument("--servicename",

1696

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

1697

parser.add_argument("--configdir",

1698

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

1699

help="Directory to search for configuration"

1700

" files")

1701

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

1702

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

1703

" system bus interface")

1704

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

1705

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

1706

options = parser.parse_args()

1670

1707

1671

1708

if options.check:

1672

1709

import doctest

1674

1711

sys.exit()

1675

1712

1676

1713

# Default values for config file for server-global settings

1677

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

1678

u"address": u"",

1679

u"port": u"",

1680

u"debug": u"False",

1681

u"priority":

1682

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

1683

u"servicename": u"Mandos",

1684

u"use_dbus": u"True",

1685

u"use_ipv6": u"True",

1686

u"debuglevel": u"",

1714

server_defaults = { "interface": "",

1715

"address": "",

1716

"port": "",

1717

"debug": "False",

1718

"priority":

1719

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

1720

"servicename": "Mandos",

1721

"use_dbus": "True",

1722

"use_ipv6": "True",

1723

"debuglevel": "",

1687

1724

}

1688

1725

1689

1726

# Parse config file for server-global settings

1690

1727

server_config = configparser.SafeConfigParser(server_defaults)

1691

1728

del server_defaults

1692

1729

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

1693

u"mandos.conf"))

1730

"mandos.conf"))

1694

1731

# Convert the SafeConfigParser object to a dict

1695

1732

server_settings = server_config.defaults()

1696

1733

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

1697

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

1698

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

1734

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

1735

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

1699

1736

option)

1700

1737

if server_settings["port"]:

1701

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

1702

u"port")

1738

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

1739

"port")

1703

1740

del server_config

1704

1741

1705

1742

# Override the settings from the config file with command line

1706

1743

# options, if set.

1707

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

1708

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

1709

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

1744

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

1745

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

1746

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

1710

1747

value = getattr(options, option)

1711

1748

if value is not None:

1712

1749

server_settings[option] = value

1720

1757

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

1721

1758

1722

1759

# For convenience

1723

debug = server_settings[u"debug"]

1724

debuglevel = server_settings[u"debuglevel"]

1725

use_dbus = server_settings[u"use_dbus"]

1726

use_ipv6 = server_settings[u"use_ipv6"]

1760

debug = server_settings["debug"]

1761

debuglevel = server_settings["debuglevel"]

1762

use_dbus = server_settings["use_dbus"]

1763

use_ipv6 = server_settings["use_ipv6"]

1727

1764

1728

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

1765

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

1729

1766

syslogger.setFormatter(logging.Formatter

1730

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

1731

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

1732

% server_settings[u"servicename"]))

1767

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

1768

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

1769

% server_settings["servicename"]))

1733

1770

1734

1771

# Parse config file with clients

1735

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

1736

u"interval": u"5m",

1737

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

1738

u"host": u"",

1739

u"approval_delay": u"0s",

1740

u"approval_duration": u"1s",

1772

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

1773

"interval": "5m",

1774

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

1775

"host": "",

1776

"approval_delay": "0s",

1777

"approval_duration": "1s",

1741

1778

}

1742

1779

client_config = configparser.SafeConfigParser(client_defaults)

1743

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

1744

u"clients.conf"))

1780

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

1781

"clients.conf"))

1745

1782

1746

1783

global mandos_dbus_service

1747

1784

mandos_dbus_service = None

1748

1785

1749

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

1750

server_settings[u"port"]),

1786

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

1787

server_settings["port"]),

1751

1788

ClientHandler,

1752

interface=(server_settings[u"interface"]

1789

interface=(server_settings["interface"]

1753

1790

or None),

1754

1791

use_ipv6=use_ipv6,

1755

1792

gnutls_priority=

1756

server_settings[u"priority"],

1793

server_settings["priority"],

1757

1794

use_dbus=use_dbus)

1758

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

1759

try:

1760

pidfile = open(pidfilename, u"w")

1761

except IOError:

1762

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

1795

if not debug:

1796

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

1797

try:

1798

pidfile = open(pidfilename, "w")

1799

except IOError:

1800

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

1763

1801

1764

1802

try:

1765

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

1766

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

1803

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

1804

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

1767

1805

except KeyError:

1768

1806

try:

1769

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

1770

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

1807

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

1808

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

1771

1809

except KeyError:

1772

1810

try:

1773

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

1774

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

1811

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

1812

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

1775

1813

except KeyError:

1776

1814

uid = 65534

1777

1815

gid = 65534

1799

1837

1800

1838

@gnutls.library.types.gnutls_log_func

1801

1839

def debug_gnutls(level, string):

1802

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

1840

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

1803

1841

1804

1842

(gnutls.library.functions

1805

1843

.gnutls_global_set_log_function(debug_gnutls))

1813

1851

# No console logging

1814

1852

logger.removeHandler(console)

1815

1853

1854

# Need to fork before connecting to D-Bus

1855

if not debug:

1856

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

1857

daemon()

1816

1858

1817

1859

global main_loop

1818

1860

# From the Avahi example code

1822

1864

# End of Avahi example code

1823

1865

if use_dbus:

1824

1866

try:

1825

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

1867

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

1826

1868

bus, do_not_queue=True)

1827

1869

except dbus.exceptions.NameExistsException, e:

1828

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

1870

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

1829

1871

use_dbus = False

1830

server_settings[u"use_dbus"] = False

1872

server_settings["use_dbus"] = False

1831

1873

tcp_server.use_dbus = False

1832

1874

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1833

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

1834

servicetype = u"_mandos._tcp",

1875

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

1876

servicetype = "_mandos._tcp",

1835

1877

protocol = protocol, bus = bus)

1836

1878

if server_settings["interface"]:

1837

1879

service.interface = (if_nametoindex

1838

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

1839

1840

if not debug:

1841

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

1842

daemon()

1843

1880

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

1881

1844

1882

global multiprocessing_manager

1845

1883

multiprocessing_manager = multiprocessing.Manager()

1846

1884

1865

1903

client_config, section)))

1866

1904

for section in client_config.sections()))

1867

1905

if not tcp_server.clients:

1868

logger.warning(u"No clients defined")

1906

logger.warning("No clients defined")

1869

1907

1870

try:

1871

with pidfile:

1872

pid = os.getpid()

1873

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

1874

del pidfile

1875

except IOError:

1876

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

1877

pidfilename, pid)

1878

except NameError:

1879

# "pidfile" was never created

1880

pass

1881

del pidfilename

1882

1883

1908

if not debug:

1909

try:

1910

with pidfile:

1911

pid = os.getpid()

1912

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

1913

del pidfile

1914

except IOError:

1915

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

1916

pidfilename, pid)

1917

except NameError:

1918

# "pidfile" was never created

1919

pass

1920

del pidfilename

1921

1884

1922

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

1923

1885

1924

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

1886

1925

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

1887

1926

1889

1928

class MandosDBusService(dbus.service.Object):

1890

1929

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

1891

1930

def __init__(self):

1892

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

1893

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

1931

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

1932

_interface = "se.bsnet.fukt.Mandos"

1894

1933

1895

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

1934

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

1896

1935

def ClientAdded(self, objpath):

1897

1936

"D-Bus signal"

1898

1937

pass

1899

1938

1900

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

1939

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

1901

1940

def ClientNotFound(self, fingerprint, address):

1902

1941

"D-Bus signal"

1903

1942

pass

1904

1943

1905

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

1944

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

1906

1945

def ClientRemoved(self, objpath, name):

1907

1946

"D-Bus signal"

1908

1947

pass

1909

1948

1910

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

1949

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

1911

1950

def GetAllClients(self):

1912

1951

"D-Bus method"

1913

1952

return dbus.Array(c.dbus_object_path

1914

1953

for c in tcp_server.clients)

1915

1954

1916

1955

@dbus.service.method(_interface,

1917

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

1956

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

1918

1957

def GetAllClientsWithProperties(self):

1919

1958

"D-Bus method"

1920

1959

return dbus.Dictionary(

1921

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

1960

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

1922

1961

for c in tcp_server.clients),

1923

signature=u"oa{sv}")

1962

signature="oa{sv}")

1924

1963

1925

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

1964

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

1926

1965

def RemoveClient(self, object_path):

1927

1966

"D-Bus method"

1928

1967

for c in tcp_server.clients:

1970

2009

# Find out what port we got

1971

2010

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

1972

2011

if use_ipv6:

1973

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

2012

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

1974

2013

" flowinfo %d, scope_id %d"

1975

2014

% tcp_server.socket.getsockname())

1976

2015

else: # IPv4

1977

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

2016

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

1978

2017

% tcp_server.socket.getsockname())

1979

2018

1980

2019

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

1984

2023

try:

1985

2024

service.activate()

1986

2025

except dbus.exceptions.DBusException, error:

1987

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

2026

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

1988

2027

cleanup()

1989

2028

sys.exit(1)

1990

2029

# End of Avahi example code

1994

2033

(tcp_server.handle_request

1995

2034

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

1996

2035

1997

logger.debug(u"Starting main loop")

2036

logger.debug("Starting main loop")

1998

2037

main_loop.run()

1999

2038

except AvahiError, error:

2000

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

2039

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

2001

2040

cleanup()

2002

2041

sys.exit(1)

2003

2042

except KeyboardInterrupt:

2004

2043

if debug:

2005

print >> sys.stderr

2006

logger.debug(u"Server received KeyboardInterrupt")

2007

logger.debug(u"Server exiting")

2044

print("", file=sys.stderr)

2045

logger.debug("Server received KeyboardInterrupt")

2046

logger.debug("Server exiting")

2008

2047

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

2009

2048

cleanup()

2010

2049