/mandos/release : revision 237.7.19

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

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#

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# Everything else is

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#

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

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

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

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#

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from __future__ import division, with_statement, absolute_import

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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import socket

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SO_BINDTODEVICE = None

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version = "1.0.14"

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version = "1.2.3"

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logger = logging.Logger(u'mandos')

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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

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syslogger.setFormatter(logging.Formatter

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

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u' %(message)s'))

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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u' %(levelname)s:'

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u' %(message)s'))

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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Attributes:

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

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Used to optionally bind to the specified interface.

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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"""

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

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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u" after %i retries, exiting.",

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError(u"Too many renames")

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

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

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unicode(self.name))

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raise AvahiServiceError("Too many renames")

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

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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

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

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% self.name))

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self.remove()

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self.add()

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try:

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self.add()

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except dbus.exceptions.DBusException, error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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self.group.connect_to_signal('StateChanged',

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self

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.entry_group_state_changed)

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

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

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self.name, self.type)

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self.group.AddService(

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self.interface,

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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

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logger.debug("Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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

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unicode(error))

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raise AvahiGroupError(u"State changed: %s"

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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self.group = None

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def server_state_changed(self, state):

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

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

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if state == avahi.SERVER_COLLISION:

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

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logger.error("Zeroconf server name collision")

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self.remove()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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self.bus.get_object(avahi.DBUS_NAME,

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avahi.DBUS_PATH_SERVER),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal(u"StateChanged",

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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

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

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

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Attributes:

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D-Bus identifiers

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

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

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approved_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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"Return the 'interval' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.interval)

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def approved_delay_milliseconds(self):

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return self._timedelta_to_milliseconds(self.approved_delay)

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def approval_delay_milliseconds(self):

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return self._timedelta_to_milliseconds(self.approval_delay)

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

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

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self.name = name

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if config is None:

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config = {}

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

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

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

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

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

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if u"secret" in config:

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

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elif u"secfile" in config:

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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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#XXX Need to allow secret on demand!

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

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

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% self.name)

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

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

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self.created = datetime.datetime.utcnow()

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self.enabled = False

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self.last_approval_request = None

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self.last_enabled = None

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self.last_checked_ok = None

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

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

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

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

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self.disable_hook = disable_hook

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

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self.checker_callback_tag = None

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self.checker_command = config[u"checker"]

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self.checker_command = config["checker"]

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self.current_checker_command = None

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self.last_connect = None

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self._approved = None

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

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True)

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self.approvals_pending = 0

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self._approved = None

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

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False)

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self.approved_delay = string_to_delta(

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config[u"approved_delay"])

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self.approved_duration = string_to_delta(

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config[u"approved_duration"])

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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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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:

456

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

493

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

513

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):

524

def dbus_service_property(dbus_interface, signature="v",

525

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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528

515

535

"""

516

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

517

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

518

if byte_arrays and signature != u"ay":

519

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

520

u" signature %r" % signature)

538

if byte_arrays and signature != "ay":

539

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

540

" signature %r" % signature)

521

541

def decorator(func):

522

542

func._dbus_is_property = True

523

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func._dbus_interface = dbus_interface

524

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func._dbus_signature = signature

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func._dbus_access = access

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func._dbus_name = func.__name__

527

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

547

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

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

529

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

549

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

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return func

531

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return decorator

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560

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581

@staticmethod

562

582

def _is_dbus_property(obj):

563

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

583

return getattr(obj, "_dbus_is_property", False)

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584

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def _get_all_dbus_properties(self):

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

574

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property with the specified name and interface.

575

595

"""

576

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for name in (property_name,

577

property_name + u"_dbus_property"):

597

property_name + "_dbus_property"):

578

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prop = getattr(self, name, None)

579

599

if (prop is None

580

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or not self._is_dbus_property(prop)

584

604

continue

585

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return prop

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606

# No such property

587

raise DBusPropertyNotFound(self.dbus_object_path + u":"

588

+ interface_name + u"."

607

raise DBusPropertyNotFound(self.dbus_object_path + ":"

608

+ interface_name + "."

589

609

+ property_name)

590

610

591

@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")

593

613

def Get(self, interface_name, property_name):

594

614

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

595

615

"""

596

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prop = self._get_dbus_property(interface_name, property_name)

597

if prop._dbus_access == u"write":

617

if prop._dbus_access == "write":

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618

raise DBusPropertyAccessException(property_name)

599

619

value = prop()

600

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

620

if not hasattr(value, "variant_level"):

601

621

return value

602

622

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

603

623

604

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

624

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

605

625

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

606

626

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

607

627

"""

608

628

prop = self._get_dbus_property(interface_name, property_name)

609

if prop._dbus_access == u"read":

629

if prop._dbus_access == "read":

610

630

raise DBusPropertyAccessException(property_name)

611

if prop._dbus_get_args_options[u"byte_arrays"]:

631

if prop._dbus_get_args_options["byte_arrays"]:

612

632

# The byte_arrays option is not supported yet on

613

633

# signatures other than "ay".

614

if prop._dbus_signature != u"ay":

634

if prop._dbus_signature != "ay":

615

635

raise ValueError

616

636

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

617

637

for byte in value))

618

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prop(value)

619

639

620

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

621

out_signature=u"a{sv}")

640

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

641

out_signature="a{sv}")

622

642

def GetAll(self, interface_name):

623

643

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

624

644

standard.

632

652

# Interface non-empty but did not match

633

653

continue

634

654

# Ignore write-only properties

635

if prop._dbus_access == u"write":

655

if prop._dbus_access == "write":

636

656

continue

637

657

value = prop()

638

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

658

if not hasattr(value, "variant_level"):

639

659

all[name] = value

640

660

continue

641

661

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

642

662

value.variant_level+1)

643

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

663

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

644

664

645

665

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

646

out_signature=u"s",

666

out_signature="s",

647

667

path_keyword='object_path',

648

668

connection_keyword='connection')

649

669

def Introspect(self, object_path, connection):

654

674

try:

655

675

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

656

676

def make_tag(document, name, prop):

657

e = document.createElement(u"property")

658

e.setAttribute(u"name", name)

659

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

660

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)

661

681

return e

662

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

682

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

663

683

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

664

684

for name, prop

665

685

in self._get_all_dbus_properties()

666

686

if prop._dbus_interface

667

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

687

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

668

688

if_tag.appendChild(tag)

669

689

# Add the names to the return values for the

670

690

# "org.freedesktop.DBus.Properties" methods

671

if (if_tag.getAttribute(u"name")

672

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

673

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

674

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

675

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

676

if (arg.getAttribute(u"direction")

677

== u"out"):

678

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

679

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

680

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

681

if (arg.getAttribute(u"direction")

682

== u"out"):

683

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

684

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")

685

705

document.unlink()

686

706

except (AttributeError, xml.dom.DOMException,

687

707

xml.parsers.expat.ExpatError), error:

688

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

708

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

689

709

error)

690

710

return xmlstring

691

711

697

717

dbus_object_path: dbus.ObjectPath

698

718

bus: dbus.SystemBus()

699

719

"""

720

721

runtime_expansions = (Client.runtime_expansions

722

+ ("dbus_object_path",))

723

700

724

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

701

725

702

726

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

727

self._approvals_pending = 0

703

728

self.bus = bus

704

729

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

705

730

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

706

731

# the D-Bus

732

client_object_name = unicode(self.name).translate(

733

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

734

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

707

735

self.dbus_object_path = (dbus.ObjectPath

708

(u"/clients/"

709

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

736

("/clients/" + client_object_name))

710

737

DBusObjectWithProperties.__init__(self, self.bus,

711

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

712

755

713

756

@staticmethod

714

757

def _datetime_to_dbus(dt, variant_level=0):

717

760

variant_level=variant_level)

718

761

719

762

def enable(self):

720

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

763

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

721

764

r = Client.enable(self)

722

765

if oldstate != self.enabled:

723

766

# Emit D-Bus signals

724

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

767

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

725

768

dbus.Boolean(True, variant_level=1))

726

769

self.PropertyChanged(

727

dbus.String(u"last_enabled"),

770

dbus.String("LastEnabled"),

728

771

self._datetime_to_dbus(self.last_enabled,

729

772

variant_level=1))

730

773

return r

731

774

732

775

def disable(self, quiet = False):

733

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

776

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

734

777

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

735

778

if not quiet and oldstate != self.enabled:

736

779

# Emit D-Bus signal

737

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

780

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

738

781

dbus.Boolean(False, variant_level=1))

739

782

return r

740

783

743

786

self.remove_from_connection()

744

787

except LookupError:

745

788

pass

746

if hasattr(DBusObjectWithProperties, u"__del__"):

789

if hasattr(DBusObjectWithProperties, "__del__"):

747

790

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

748

791

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

749

792

752

795

self.checker_callback_tag = None

753

796

self.checker = None

754

797

# Emit D-Bus signal

755

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

798

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

756

799

dbus.Boolean(False, variant_level=1))

757

800

if os.WIFEXITED(condition):

758

801

exitstatus = os.WEXITSTATUS(condition)

773

816

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

774

817

# Emit D-Bus signal

775

818

self.PropertyChanged(

776

dbus.String(u"last_checked_ok"),

819

dbus.String("LastCheckedOK"),

777

820

(self._datetime_to_dbus(self.last_checked_ok,

778

821

variant_level=1)))

779

822

return r

780

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

781

833

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

782

834

old_checker = self.checker

783

835

if self.checker is not None:

791

843

# Emit D-Bus signal

792

844

self.CheckerStarted(self.current_checker_command)

793

845

self.PropertyChanged(

794

dbus.String(u"checker_running"),

846

dbus.String("CheckerRunning"),

795

847

dbus.Boolean(True, variant_level=1))

796

848

return r

797

849

798

850

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

799

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

851

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

800

852

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

801

853

if (old_checker is not None

802

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

803

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

854

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

855

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

804

856

dbus.Boolean(False, variant_level=1))

805

857

return r

806

858

809

861

return False

810

862

811

863

def approve(self, value=True):

864

self.send_changedstate()

812

865

self._approved = value

813

gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration, self._reset_approved))

814

815

def approved_pending(self):

816

return self.approvals_pending > 0

817

866

gobject.timeout_add(self._timedelta_to_milliseconds

867

(self.approval_duration),

868

self._reset_approved)

869

818

870

819

871

## D-Bus methods, signals & properties

820

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

872

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

821

873

822

874

## Signals

823

875

824

876

# CheckerCompleted - signal

825

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

877

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

826

878

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

827

879

"D-Bus signal"

828

880

pass

829

881

830

882

# CheckerStarted - signal

831

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

883

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

832

884

def CheckerStarted(self, command):

833

885

"D-Bus signal"

834

886

pass

835

887

836

888

# PropertyChanged - signal

837

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

889

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

838

890

def PropertyChanged(self, property, value):

839

891

"D-Bus signal"

840

892

pass

841

893

842

894

# GotSecret - signal

843

# Is sent after succesfull transfer of secret from mandos-server to mandos-client

844

895

@dbus.service.signal(_interface)

845

896

def GotSecret(self):

846

"D-Bus signal"

897

"""D-Bus signal

898

Is sent after a successful transfer of secret from the Mandos

899

server to mandos-client

900

"""

847

901

pass

848

902

849

903

# Rejected - signal

850

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

904

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

851

905

def Rejected(self, reason):

852

906

"D-Bus signal"

853

907

pass

854

908

855

909

# NeedApproval - signal

856

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

910

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

857

911

def NeedApproval(self, timeout, default):

858

912

"D-Bus signal"

859

pass

913

return self.need_approval()

860

914

861

915

## Methods

862

916

863

917

# Approve - method

864

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

918

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

865

919

def Approve(self, value):

866

920

self.approve(value)

867

921

868

922

# CheckedOK - method

869

923

@dbus.service.method(_interface)

870

924

def CheckedOK(self):

895

949

896

950

## Properties

897

951

898

# approved_pending - property

899

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

900

def approved_pending_dbus_property(self):

901

return dbus.Boolean(self.approved_pending())

902

903

# approved_by_default - property

904

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

905

access=u"readwrite")

906

def approved_by_default_dbus_property(self):

907

return dbus.Boolean(self.approved_by_default)

908

909

# approved_delay - property

910

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

911

access=u"readwrite")

912

def approved_delay_dbus_property(self):

913

return dbus.UInt64(self.approved_delay_milliseconds())

914

915

# approved_duration - property

916

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

917

access=u"readwrite")

918

def approved_duration_dbus_property(self):

919

return dbus.UInt64(self._timedelta_to_milliseconds(

920

self.approved_duration))

921

922

# name - property

923

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

924

def name_dbus_property(self):

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):

925

994

return dbus.String(self.name)

926

995

927

# fingerprint - property

928

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

929

def fingerprint_dbus_property(self):

996

# Fingerprint - property

997

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

998

def Fingerprint_dbus_property(self):

930

999

return dbus.String(self.fingerprint)

931

1000

932

# host - property

933

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

934

access=u"readwrite")

935

def host_dbus_property(self, value=None):

1001

# Host - property

1002

@dbus_service_property(_interface, signature="s",

1003

access="readwrite")

1004

def Host_dbus_property(self, value=None):

936

1005

if value is None: # get

937

1006

return dbus.String(self.host)

938

1007

self.host = value

939

1008

# Emit D-Bus signal

940

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

1009

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

941

1010

dbus.String(value, variant_level=1))

942

1011

943

# created - property

944

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

945

def created_dbus_property(self):

1012

# Created - property

1013

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

1014

def Created_dbus_property(self):

946

1015

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

947

1016

948

# last_enabled - property

949

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

950

def last_enabled_dbus_property(self):

1017

# LastEnabled - property

1018

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

1019

def LastEnabled_dbus_property(self):

951

1020

if self.last_enabled is None:

952

return dbus.String(u"")

1021

return dbus.String("")

953

1022

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

954

1023

955

# enabled - property

956

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

957

access=u"readwrite")

958

def enabled_dbus_property(self, value=None):

1024

# Enabled - property

1025

@dbus_service_property(_interface, signature="b",

1026

access="readwrite")

1027

def Enabled_dbus_property(self, value=None):

959

1028

if value is None: # get

960

1029

return dbus.Boolean(self.enabled)

961

1030

if value:

963

1032

else:

964

1033

self.disable()

965

1034

966

# last_checked_ok - property

967

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

968

access=u"readwrite")

969

def last_checked_ok_dbus_property(self, value=None):

1035

# LastCheckedOK - property

1036

@dbus_service_property(_interface, signature="s",

1037

access="readwrite")

1038

def LastCheckedOK_dbus_property(self, value=None):

970

1039

if value is not None:

971

1040

self.checked_ok()

972

1041

return

973

1042

if self.last_checked_ok is None:

974

return dbus.String(u"")

1043

return dbus.String("")

975

1044

return dbus.String(self._datetime_to_dbus(self

976

1045

.last_checked_ok))

977

1046

978

# timeout - property

979

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

980

access=u"readwrite")

981

def timeout_dbus_property(self, value=None):

1047

# LastApprovalRequest - property

1048

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

1049

def LastApprovalRequest_dbus_property(self):

1050

if self.last_approval_request is None:

1051

return dbus.String("")

1052

return dbus.String(self.

1053

_datetime_to_dbus(self

1054

.last_approval_request))

1055

1056

# Timeout - property

1057

@dbus_service_property(_interface, signature="t",

1058

access="readwrite")

1059

def Timeout_dbus_property(self, value=None):

982

1060

if value is None: # get

983

1061

return dbus.UInt64(self.timeout_milliseconds())

984

1062

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

985

1063

# Emit D-Bus signal

986

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

1064

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

987

1065

dbus.UInt64(value, variant_level=1))

988

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

1066

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

989

1067

return

990

1068

# Reschedule timeout

991

1069

gobject.source_remove(self.disable_initiator_tag)

1003

1081

self.disable_initiator_tag = (gobject.timeout_add

1004

1082

(time_to_die, self.disable))

1005

1083

1006

# interval - property

1007

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

1008

access=u"readwrite")

1009

def interval_dbus_property(self, value=None):

1084

# Interval - property

1085

@dbus_service_property(_interface, signature="t",

1086

access="readwrite")

1087

def Interval_dbus_property(self, value=None):

1010

1088

if value is None: # get

1011

1089

return dbus.UInt64(self.interval_milliseconds())

1012

1090

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

1013

1091

# Emit D-Bus signal

1014

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

1092

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

1015

1093

dbus.UInt64(value, variant_level=1))

1016

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

1094

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

1017

1095

return

1018

1096

# Reschedule checker run

1019

1097

gobject.source_remove(self.checker_initiator_tag)

1021

1099

(value, self.start_checker))

1022

1100

self.start_checker() # Start one now, too

1023

1101

1024

# checker - property

1025

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

1026

access=u"readwrite")

1027

def checker_dbus_property(self, value=None):

1102

# Checker - property

1103

@dbus_service_property(_interface, signature="s",

1104

access="readwrite")

1105

def Checker_dbus_property(self, value=None):

1028

1106

if value is None: # get

1029

1107

return dbus.String(self.checker_command)

1030

1108

self.checker_command = value

1031

1109

# Emit D-Bus signal

1032

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

1110

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

1033

1111

dbus.String(self.checker_command,

1034

1112

variant_level=1))

1035

1113

1036

# checker_running - property

1037

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

1038

access=u"readwrite")

1039

def checker_running_dbus_property(self, value=None):

1114

# CheckerRunning - property

1115

@dbus_service_property(_interface, signature="b",

1116

access="readwrite")

1117

def CheckerRunning_dbus_property(self, value=None):

1040

1118

if value is None: # get

1041

1119

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

1042

1120

if value:

1044

1122

else:

1045

1123

self.stop_checker()

1046

1124

1047

# object_path - property

1048

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

1049

def object_path_dbus_property(self):

1125

# ObjectPath - property

1126

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

1127

def ObjectPath_dbus_property(self):

1050

1128

return self.dbus_object_path # is already a dbus.ObjectPath

1051

1129

1052

# secret = property

1053

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

1054

access=u"write", byte_arrays=True)

1055

def secret_dbus_property(self, value):

1130

# Secret = property

1131

@dbus_service_property(_interface, signature="ay",

1132

access="write", byte_arrays=True)

1133

def Secret_dbus_property(self, value):

1056

1134

self.secret = str(value)

1057

1135

1058

1136

del _interface

1092

1170

1093

1171

def handle(self):

1094

1172

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

1095

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

1173

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

1096

1174

unicode(self.client_address))

1097

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

1175

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

1098

1176

self.server.child_pipe.fileno())

1099

1177

1100

1178

session = (gnutls.connection

1107

1185

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

1108

1186

# here despite using OpenPGP certificates.

1109

1187

1110

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

1111

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

1112

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

1113

# u"+DHE-DSS"))

1188

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

1189

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

1190

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

1191

# "+DHE-DSS"))

1114

1192

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

1115

1193

priority = self.server.gnutls_priority

1116

1194

if priority is None:

1117

priority = u"NORMAL"

1195

priority = "NORMAL"

1118

1196

(gnutls.library.functions

1119

1197

.gnutls_priority_set_direct(session._c_object,

1120

1198

priority, None))

1122

1200

# Start communication using the Mandos protocol

1123

1201

# Get protocol number

1124

1202

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

1125

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

1203

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

1126

1204

try:

1127

1205

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

1128

1206

raise RuntimeError

1129

1207

except (ValueError, IndexError, RuntimeError), error:

1130

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

1208

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

1131

1209

return

1132

1210

1133

1211

# Start GnuTLS connection

1134

1212

try:

1135

1213

session.handshake()

1136

1214

except gnutls.errors.GNUTLSError, error:

1137

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

1215

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

1138

1216

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

1139

1217

# established. Just abandon the request.

1140

1218

return

1141

logger.debug(u"Handshake succeeded")

1219

logger.debug("Handshake succeeded")

1142

1220

1143

1221

approval_required = False

1144

1222

try:

1146

1224

fpr = self.fingerprint(self.peer_certificate

1147

1225

(session))

1148

1226

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

1149

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

1227

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

1150

1228

return

1151

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

1229

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

1152

1230

1153

1231

try:

1154

1232

client = ProxyClient(child_pipe, fpr,

1156

1234

except KeyError:

1157

1235

return

1158

1236

1159

if client.approved_delay:

1160

delay = client.approved_delay

1237

if client.approval_delay:

1238

delay = client.approval_delay

1161

1239

client.approvals_pending += 1

1162

1240

approval_required = True

1163

1241

1164

1242

while True:

1165

1243

if not client.enabled:

1166

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

1244

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

1167

1245

client.name)

1168

1246

if self.server.use_dbus:

1169

1247

# Emit D-Bus signal

1170

1248

client.Rejected("Disabled")

1171

1249

return

1172

1250

1173

if client._approved or not client.approved_delay:

1251

if client._approved or not client.approval_delay:

1174

1252

#We are approved or approval is disabled

1175

1253

break

1176

1254

elif client._approved is None:

1177

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

1255

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

1178

1256

client.name)

1179

1257

if self.server.use_dbus:

1180

1258

# Emit D-Bus signal

1181

1259

client.NeedApproval(

1182

client.approved_delay_milliseconds(),

1260

client.approval_delay_milliseconds(),

1183

1261

client.approved_by_default)

1184

1262

else:

1185

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

1263

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

1186

1264

client.name)

1187

1265

if self.server.use_dbus:

1188

1266

# Emit D-Bus signal

1189

client.Rejected("Disapproved")

1267

client.Rejected("Denied")

1190

1268

return

1191

1269

1192

1270

#wait until timeout or approved

1203

1281

client.name)

1204

1282

if self.server.use_dbus:

1205

1283

# Emit D-Bus signal

1206

client.Rejected("Time out")

1284

client.Rejected("Approval timed out")

1207

1285

return

1208

1286

else:

1209

1287

break

1212

1290

1213

1291

sent_size = 0

1214

1292

while sent_size < len(client.secret):

1215

# XXX handle session exception

1216

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

1217

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

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",

1218

1299

sent, len(client.secret)

1219

1300

- (sent_size + sent))

1220

1301

sent_size += sent

1221

1302

1222

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

1303

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

1223

1304

# bump the timeout as if seen

1224

1305

client.checked_ok()

1225

1306

if self.server.use_dbus:

1229

1310

finally:

1230

1311

if approval_required:

1231

1312

client.approvals_pending -= 1

1232

session.bye()

1313

try:

1314

session.bye()

1315

except (gnutls.errors.GNUTLSError), error:

1316

logger.warning("GnuTLS bye failed")

1233

1317

1234

1318

@staticmethod

1235

1319

def peer_certificate(session):

1245

1329

.gnutls_certificate_get_peers

1246

1330

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

1247

1331

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

1248

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

1249

u" certificate")

1332

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

1333

" certificate")

1250

1334

if list_size.value == 0:

1251

1335

return None

1252

1336

cert = cert_list[0]

1278

1362

if crtverify.value != 0:

1279

1363

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1280

1364

raise (gnutls.errors.CertificateSecurityError

1281

(u"Verify failed"))

1365

("Verify failed"))

1282

1366

# New buffer for the fingerprint

1283

1367

buf = ctypes.create_string_buffer(20)

1284

1368

buf_len = ctypes.c_size_t()

1291

1375

# Convert the buffer to a Python bytestring

1292

1376

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

1293

1377

# Convert the bytestring to hexadecimal notation

1294

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

1378

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

1295

1379

return hex_fpr

1296

1380

1297

1381

1322

1406

self).process_request(request, client_address)

1323

1407

self.child_pipe.close()

1324

1408

self.add_pipe(parent_pipe)

1325

1409

1326

1410

def add_pipe(self, parent_pipe):

1327

1411

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

1328

pass

1412

raise NotImplementedError

1329

1413

1330

1414

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1331

1415

socketserver.TCPServer, object):

1349

1433

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

1350

1434

if self.interface is not None:

1351

1435

if SO_BINDTODEVICE is None:

1352

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

1353

u" cannot bind to interface %s",

1436

logger.error("SO_BINDTODEVICE does not exist;"

1437

" cannot bind to interface %s",

1354

1438

self.interface)

1355

1439

else:

1356

1440

try:

1357

1441

self.socket.setsockopt(socket.SOL_SOCKET,

1358

1442

SO_BINDTODEVICE,

1359

1443

str(self.interface

1360

+ u'\0'))

1444

+ '\0'))

1361

1445

except socket.error, error:

1362

1446

if error[0] == errno.EPERM:

1363

logger.error(u"No permission to"

1364

u" bind to interface %s",

1447

logger.error("No permission to"

1448

" bind to interface %s",

1365

1449

self.interface)

1366

1450

elif error[0] == errno.ENOPROTOOPT:

1367

logger.error(u"SO_BINDTODEVICE not available;"

1368

u" cannot bind to interface %s",

1451

logger.error("SO_BINDTODEVICE not available;"

1452

" cannot bind to interface %s",

1369

1453

self.interface)

1370

1454

else:

1371

1455

raise

1373

1457

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

1374

1458

if not self.server_address[0]:

1375

1459

if self.address_family == socket.AF_INET6:

1376

any_address = u"::" # in6addr_any

1460

any_address = "::" # in6addr_any

1377

1461

else:

1378

1462

any_address = socket.INADDR_ANY

1379

1463

self.server_address = (any_address,

1428

1512

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

1429

1513

client_object=None):

1430

1514

condition_names = {

1431

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

1432

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

1433

1517

# blocking).

1434

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

1435

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

1436

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

1437

1521

# broken, usually for pipes and

1438

1522

# sockets).

1439

1523

}

1441

1525

for cond, name in

1442

1526

condition_names.iteritems()

1443

1527

if cond & condition)

1444

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

1445

conditions_string)

1446

1447

1528

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

1448

if condition & gobject.IO_HUP or condition & gobject.IO_ERR:

1529

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

1449

1530

return False

1450

1531

1451

1532

# Read a request from the child

1452

1533

request = parent_pipe.recv()

1453

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

1454

1534

command = request[0]

1455

1535

1456

1536

if command == 'init':

1462

1542

client = c

1463

1543

break

1464

1544

else:

1465

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

1466

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

1545

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

1546

"dress: %s", fpr, address)

1467

1547

if self.use_dbus:

1468

1548

# Emit D-Bus signal

1469

mandos_dbus_service.ClientNotFound(fpr, address)

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

1470

1550

parent_pipe.send(False)

1471

1551

return False

1472

1552

1491

1571

parent_pipe.send(('function',))

1492

1572

else:

1493

1573

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

1494

1574

1495

1575

if command == 'setattr':

1496

1576

attrname = request[1]

1497

1577

value = request[2]

1498

1578

setattr(client_object, attrname, value)

1499

1579

1500

1580

return True

1501

1581

1502

1582

1503

1583

def string_to_delta(interval):

1504

1584

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

1505

1585

1506

>>> string_to_delta(u'7d')

1586

>>> string_to_delta('7d')

1507

1587

datetime.timedelta(7)

1508

>>> string_to_delta(u'60s')

1588

>>> string_to_delta('60s')

1509

1589

datetime.timedelta(0, 60)

1510

>>> string_to_delta(u'60m')

1590

>>> string_to_delta('60m')

1511

1591

datetime.timedelta(0, 3600)

1512

>>> string_to_delta(u'24h')

1592

>>> string_to_delta('24h')

1513

1593

datetime.timedelta(1)

1514

>>> string_to_delta(u'1w')

1594

>>> string_to_delta('1w')

1515

1595

datetime.timedelta(7)

1516

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

1596

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

1517

1597

datetime.timedelta(0, 330)

1518

1598

"""

1519

1599

timevalue = datetime.timedelta(0)

1521

1601

try:

1522

1602

suffix = unicode(s[-1])

1523

1603

value = int(s[:-1])

1524

if suffix == u"d":

1604

if suffix == "d":

1525

1605

delta = datetime.timedelta(value)

1526

elif suffix == u"s":

1606

elif suffix == "s":

1527

1607

delta = datetime.timedelta(0, value)

1528

elif suffix == u"m":

1608

elif suffix == "m":

1529

1609

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

1530

elif suffix == u"h":

1610

elif suffix == "h":

1531

1611

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

1532

elif suffix == u"w":

1612

elif suffix == "w":

1533

1613

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

1534

1614

else:

1535

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

1615

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

1536

1616

except (ValueError, IndexError), e:

1537

raise ValueError(e.message)

1617

raise ValueError(*(e.args))

1538

1618

timevalue += delta

1539

1619

return timevalue

1540

1620

1546

1626

global if_nametoindex

1547

1627

try:

1548

1628

if_nametoindex = (ctypes.cdll.LoadLibrary

1549

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

1629

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

1550

1630

.if_nametoindex)

1551

1631

except (OSError, AttributeError):

1552

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

1632

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

1553

1633

def if_nametoindex(interface):

1554

1634

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

1555

1635

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

1556

1636

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

1557

1637

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1558

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

1638

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

1559

1639

interface))

1560

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

1640

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

1561

1641

ifreq[16:20])[0]

1562

1642

return interface_index

1563

1643

return if_nametoindex(interface)

1571

1651

sys.exit()

1572

1652

os.setsid()

1573

1653

if not nochdir:

1574

os.chdir(u"/")

1654

os.chdir("/")

1575

1655

if os.fork():

1576

1656

sys.exit()

1577

1657

if not noclose:

1579

1659

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

1580

1660

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

1581

1661

raise OSError(errno.ENODEV,

1582

u"%s not a character device"

1662

"%s not a character device"

1583

1663

% os.path.devnull)

1584

1664

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

1585

1665

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

1594

1674

# Parsing of options, both command line and config file

1595

1675

1596

1676

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

1597

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

1598

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

1599

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

1600

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

1601

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

1602

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

1603

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

1604

help=u"Run self-test")

1605

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

1606

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

1607

u" terminal")

1608

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

1609

u" priority string (see GnuTLS documentation)")

1610

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

1611

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

1612

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

1613

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

1614

help=u"Directory to search for configuration"

1615

u" files")

1616

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

1617

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

1618

u" system bus interface")

1619

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

1620

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

1677

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

1678

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

1679

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

1680

help="Address to listen for requests on")

1681

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

1682

help="Port number to receive requests on")

1683

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

1684

help="Run self-test")

1685

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

1686

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

1687

" terminal")

1688

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

1689

help="Debug level for stdout output")

1690

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

1691

" priority string (see GnuTLS documentation)")

1692

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

1693

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

1694

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

1695

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

1696

help="Directory to search for configuration"

1697

" files")

1698

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

1699

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

1700

" system bus interface")

1701

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

1702

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

1621

1703

options = parser.parse_args()[0]

1622

1704

1623

1705

if options.check:

1626

1708

sys.exit()

1627

1709

1628

1710

# Default values for config file for server-global settings

1629

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

1630

u"address": u"",

1631

u"port": u"",

1632

u"debug": u"False",

1633

u"priority":

1634

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

1635

u"servicename": u"Mandos",

1636

u"use_dbus": u"True",

1637

u"use_ipv6": u"True",

1711

server_defaults = { "interface": "",

1712

"address": "",

1713

"port": "",

1714

"debug": "False",

1715

"priority":

1716

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

1717

"servicename": "Mandos",

1718

"use_dbus": "True",

1719

"use_ipv6": "True",

1720

"debuglevel": "",

1638

1721

}

1639

1722

1640

1723

# Parse config file for server-global settings

1641

1724

server_config = configparser.SafeConfigParser(server_defaults)

1642

1725

del server_defaults

1643

1726

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

1644

u"mandos.conf"))

1727

"mandos.conf"))

1645

1728

# Convert the SafeConfigParser object to a dict

1646

1729

server_settings = server_config.defaults()

1647

1730

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

1648

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

1649

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

1731

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

1732

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

1650

1733

option)

1651

1734

if server_settings["port"]:

1652

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

1653

u"port")

1735

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

1736

"port")

1654

1737

del server_config

1655

1738

1656

1739

# Override the settings from the config file with command line

1657

1740

# options, if set.

1658

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

1659

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

1660

u"use_dbus", u"use_ipv6"):

1741

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

1742

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

1743

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

1661

1744

value = getattr(options, option)

1662

1745

if value is not None:

1663

1746

server_settings[option] = value

1671

1754

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

1672

1755

1673

1756

# For convenience

1674

debug = server_settings[u"debug"]

1675

use_dbus = server_settings[u"use_dbus"]

1676

use_ipv6 = server_settings[u"use_ipv6"]

1677

1678

if not debug:

1679

syslogger.setLevel(logging.WARNING)

1680

console.setLevel(logging.WARNING)

1681

1682

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

1757

debug = server_settings["debug"]

1758

debuglevel = server_settings["debuglevel"]

1759

use_dbus = server_settings["use_dbus"]

1760

use_ipv6 = server_settings["use_ipv6"]

1761

1762

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

1683

1763

syslogger.setFormatter(logging.Formatter

1684

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

1685

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

1686

% server_settings[u"servicename"]))

1764

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

1765

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

1766

% server_settings["servicename"]))

1687

1767

1688

1768

# Parse config file with clients

1689

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

1690

u"interval": u"5m",

1691

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

1692

u"host": u"",

1693

u"approved_delay": u"5m",

1694

u"approved_duration": u"1s",

1769

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

1770

"interval": "5m",

1771

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

1772

"host": "",

1773

"approval_delay": "0s",

1774

"approval_duration": "1s",

1695

1775

}

1696

1776

client_config = configparser.SafeConfigParser(client_defaults)

1697

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

1698

u"clients.conf"))

1777

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

1778

"clients.conf"))

1699

1779

1700

1780

global mandos_dbus_service

1701

1781

mandos_dbus_service = None

1702

1782

1703

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

1704

server_settings[u"port"]),

1783

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

1784

server_settings["port"]),

1705

1785

ClientHandler,

1706

interface=server_settings[u"interface"],

1786

interface=(server_settings["interface"]

1787

or None),

1707

1788

use_ipv6=use_ipv6,

1708

1789

gnutls_priority=

1709

server_settings[u"priority"],

1790

server_settings["priority"],

1710

1791

use_dbus=use_dbus)

1711

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

1712

try:

1713

pidfile = open(pidfilename, u"w")

1714

except IOError:

1715

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

1792

if not debug:

1793

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

1794

try:

1795

pidfile = open(pidfilename, "w")

1796

except IOError:

1797

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

1716

1798

1717

1799

try:

1718

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

1719

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

1800

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

1801

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

1720

1802

except KeyError:

1721

1803

try:

1722

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

1723

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

1804

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

1805

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

1724

1806

except KeyError:

1725

1807

try:

1726

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

1727

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

1808

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

1809

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

1728

1810

except KeyError:

1729

1811

uid = 65534

1730

1812

gid = 65534

1735

1817

if error[0] != errno.EPERM:

1736

1818

raise error

1737

1819

1738

# Enable all possible GnuTLS debugging

1820

if not debug and not debuglevel:

1821

syslogger.setLevel(logging.WARNING)

1822

console.setLevel(logging.WARNING)

1823

if debuglevel:

1824

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

1825

syslogger.setLevel(level)

1826

console.setLevel(level)

1827

1739

1828

if debug:

1829

# Enable all possible GnuTLS debugging

1830

1740

1831

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

1741

1832

# - GnuTLS manual

1742

1833

gnutls.library.functions.gnutls_global_set_log_level(11)

1743

1834

1744

1835

@gnutls.library.types.gnutls_log_func

1745

1836

def debug_gnutls(level, string):

1746

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

1837

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

1747

1838

1748

1839

(gnutls.library.functions

1749

1840

.gnutls_global_set_log_function(debug_gnutls))

1841

1842

# Redirect stdin so all checkers get /dev/null

1843

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

1844

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

1845

if null > 2:

1846

os.close(null)

1847

else:

1848

# No console logging

1849

logger.removeHandler(console)

1850

1851

# Need to fork before connecting to D-Bus

1852

if not debug:

1853

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

1854

daemon()

1750

1855

1751

1856

global main_loop

1752

1857

# From the Avahi example code

1756

1861

# End of Avahi example code

1757

1862

if use_dbus:

1758

1863

try:

1759

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

1864

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

1760

1865

bus, do_not_queue=True)

1761

1866

except dbus.exceptions.NameExistsException, e:

1762

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

1867

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

1763

1868

use_dbus = False

1764

server_settings[u"use_dbus"] = False

1869

server_settings["use_dbus"] = False

1765

1870

tcp_server.use_dbus = False

1766

1871

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1767

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

1768

servicetype = u"_mandos._tcp",

1872

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

1873

servicetype = "_mandos._tcp",

1769

1874

protocol = protocol, bus = bus)

1770

1875

if server_settings["interface"]:

1771

1876

service.interface = (if_nametoindex

1772

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

1773

1877

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

1878

1774

1879

global multiprocessing_manager

1775

1880

multiprocessing_manager = multiprocessing.Manager()

1776

1881

1795

1900

client_config, section)))

1796

1901

for section in client_config.sections()))

1797

1902

if not tcp_server.clients:

1798

logger.warning(u"No clients defined")

1799

1800

if debug:

1801

# Redirect stdin so all checkers get /dev/null

1802

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

1803

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

1804

if null > 2:

1805

os.close(null)

1806

else:

1807

# No console logging

1808

logger.removeHandler(console)

1809

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

1810

daemon()

1811

1812

try:

1813

with pidfile:

1814

pid = os.getpid()

1815

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

1816

del pidfile

1817

except IOError:

1818

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

1819

pidfilename, pid)

1820

except NameError:

1821

# "pidfile" was never created

1822

pass

1823

del pidfilename

1824

1903

logger.warning("No clients defined")

1904

1825

1905

if not debug:

1906

try:

1907

with pidfile:

1908

pid = os.getpid()

1909

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

1910

del pidfile

1911

except IOError:

1912

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

1913

pidfilename, pid)

1914

except NameError:

1915

# "pidfile" was never created

1916

pass

1917

del pidfilename

1918

1826

1919

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

1920

1827

1921

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

1828

1922

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

1829

1923

1831

1925

class MandosDBusService(dbus.service.Object):

1832

1926

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

1833

1927

def __init__(self):

1834

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

1835

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

1928

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

1929

_interface = "se.bsnet.fukt.Mandos"

1836

1930

1837

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

1931

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

1838

1932

def ClientAdded(self, objpath):

1839

1933

"D-Bus signal"

1840

1934

pass

1841

1935

1842

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

1936

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

1843

1937

def ClientNotFound(self, fingerprint, address):

1844

1938

"D-Bus signal"

1845

1939

pass

1846

1940

1847

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

1941

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

1848

1942

def ClientRemoved(self, objpath, name):

1849

1943

"D-Bus signal"

1850

1944

pass

1851

1945

1852

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

1946

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

1853

1947

def GetAllClients(self):

1854

1948

"D-Bus method"

1855

1949

return dbus.Array(c.dbus_object_path

1856

1950

for c in tcp_server.clients)

1857

1951

1858

1952

@dbus.service.method(_interface,

1859

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

1953

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

1860

1954

def GetAllClientsWithProperties(self):

1861

1955

"D-Bus method"

1862

1956

return dbus.Dictionary(

1863

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

1957

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

1864

1958

for c in tcp_server.clients),

1865

signature=u"oa{sv}")

1959

signature="oa{sv}")

1866

1960

1867

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

1961

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

1868

1962

def RemoveClient(self, object_path):

1869

1963

"D-Bus method"

1870

1964

for c in tcp_server.clients:

1912

2006

# Find out what port we got

1913

2007

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

1914

2008

if use_ipv6:

1915

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

2009

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

1916

2010

" flowinfo %d, scope_id %d"

1917

2011

% tcp_server.socket.getsockname())

1918

2012

else: # IPv4

1919

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

2013

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

1920

2014

% tcp_server.socket.getsockname())

1921

2015

1922

2016

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

1926

2020

try:

1927

2021

service.activate()

1928

2022

except dbus.exceptions.DBusException, error:

1929

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

2023

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

1930

2024

cleanup()

1931

2025

sys.exit(1)

1932

2026

# End of Avahi example code

1936

2030

(tcp_server.handle_request

1937

2031

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

1938

2032

1939

logger.debug(u"Starting main loop")

2033

logger.debug("Starting main loop")

1940

2034

main_loop.run()

1941

2035

except AvahiError, error:

1942

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

2036

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

1943

2037

cleanup()

1944

2038

sys.exit(1)

1945

2039

except KeyboardInterrupt:

1946

2040

if debug:

1947

print >> sys.stderr

1948

logger.debug(u"Server received KeyboardInterrupt")

1949

logger.debug(u"Server exiting")

2041

print("", file=sys.stderr)

2042

logger.debug("Server received KeyboardInterrupt")

2043

logger.debug("Server exiting")

1950

2044

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

1951

2045

cleanup()

1952

2046