/mandos/trunk : revision 481

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# along with this program. If not, see

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# <http://www.gnu.org/licenses/>.

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#

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# Contact the authors at <mandos@recompile.se>.

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

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#

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from __future__ import (division, absolute_import, print_function,

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import functools

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import cPickle as pickle

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import multiprocessing

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import types

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import hashlib

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import dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import Crypto.Cipher.AES

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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SO_BINDTODEVICE = None

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version = "1.4.1"

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logger = logging.getLogger()

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stored_state_path = "/var/lib/mandos/clients.pickle"

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version = "1.3.0"

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

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

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' [%(process)d]:'

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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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def __init__(self, value, *args, **kwargs):

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self.value = value

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self.group = None # our entry group

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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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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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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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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('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 as error:

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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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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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self.group.connect_to_signal('StateChanged',

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self

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.entry_group_state_changed)

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

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self.name, self.type)

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self.group.AddService(

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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pass

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self.group.Free()

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self.group = None

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self.remove()

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def server_state_changed(self, state, error=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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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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else:

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logger.error(bad_states[state] + ": %r", error)

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self.cleanup()

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if state == avahi.SERVER_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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else:

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if error is None:

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logger.debug("Unknown state: %r", state)

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else:

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logger.debug("Unknown state: %r: %r", state, error)

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def activate(self):

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

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if self.server is None:

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self.server = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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avahi.DBUS_PATH_SERVER,

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follow_name_owner_changes=True),

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avahi.DBUS_PATH_SERVER),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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"""Add the new name to the syslog messages"""

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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return ret

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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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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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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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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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_checker_status: integer between 0 and 255 reflecting exit status

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of last checker. -1 reflect crashed checker,

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or None.

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last_enabled: datetime.datetime(); (UTC)

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name: string; from the config file, used in log messages and

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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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extended_timeout: extra long timeout when password has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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expires: datetime.datetime(); time (UTC) when a client will be

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disabled, or None

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.extended_timeout)

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return self._timedelta_to_milliseconds(self.timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.interval)

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return self._timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return _timedelta_to_milliseconds(self.approval_delay)

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return self._timedelta_to_milliseconds(self.approval_delay)

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

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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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'checker_command' attribute and *not* the 'checker'

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attribute."""

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% self.name)

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

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self.created = datetime.datetime.utcnow()

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self.enabled = True

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self.enabled = False

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self.last_approval_request = None

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self.last_enabled = datetime.datetime.utcnow()

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self.last_enabled = None

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self.last_checked_ok = None

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self.last_checker_status = None

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

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self.extended_timeout = string_to_delta(config

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["extended_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.expires = datetime.datetime.utcnow() + self.timeout

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self.checker_callback_tag = None

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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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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

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.Condition(multiprocessing_manager

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.Lock()))

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self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]

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self.client_structure.append("client_structure")

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for name, t in inspect.getmembers(type(self),

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lambda obj: isinstance(obj, property)):

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if not name.startswith("_"):

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self.client_structure.append(name)

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

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# Send notice to process children that client state has changed

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def send_changedstate(self):

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with self.changedstate:

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self.changedstate.notify_all()

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self.changedstate.acquire()

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self.changedstate.notify_all()

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self.changedstate.release()

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def enable(self):

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

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

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# Already enabled

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return

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self.send_changedstate()

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self.expires = datetime.datetime.utcnow() + self.timeout

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self.last_enabled = datetime.datetime.utcnow()

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

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# and every interval from then on.

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self.checker_initiator_tag = (gobject.timeout_add

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(self.interval_milliseconds(),

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self.start_checker))

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

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self.disable_initiator_tag = (gobject.timeout_add

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(self.timeout_milliseconds(),

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self.disable))

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self.enabled = True

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self.last_enabled = datetime.datetime.utcnow()

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self.init_checker()

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# Also start a new checker *right now*.

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self.start_checker()

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def disable(self, quiet=True):

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"""Disable this client."""

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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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self.expires = None

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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 self.disable_hook:

390

self.disable_hook(self)

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self.enabled = False

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# Do not run this again if called by a gobject.timeout_add

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return False

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446

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def __del__(self):

396

self.disable_hook = None

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self.disable()

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def init_checker(self):

450

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

451

# and every interval from then on.

452

self.checker_initiator_tag = (gobject.timeout_add

453

(self.interval_milliseconds(),

454

self.start_checker))

455

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

456

self.disable_initiator_tag = (gobject.timeout_add

457

(self.timeout_milliseconds(),

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self.disable))

459

# Also start a new checker *right now*.

460

self.start_checker()

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462

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def checker_callback(self, pid, condition, command):

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"""The checker has completed, so take appropriate actions."""

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self.checker_callback_tag = None

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self.checker = None

467

403

if os.WIFEXITED(condition):

468

self.last_checker_status = os.WEXITSTATUS(condition)

469

if self.last_checker_status == 0:

404

exitstatus = os.WEXITSTATUS(condition)

405

if exitstatus == 0:

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

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vars(self))

476

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else:

477

self.last_checker_status = -1

478

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

479

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vars(self))

480

415

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def checked_ok(self, timeout=None):

416

def checked_ok(self):

482

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"""Bump up the timeout for this client.

483

418

484

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This should only be called when the client has been seen,

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alive and well.

486

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"""

487

if timeout is None:

488

timeout = self.timeout

489

422

self.last_checked_ok = datetime.datetime.utcnow()

490

if self.disable_initiator_tag is not None:

491

gobject.source_remove(self.disable_initiator_tag)

492

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

493

self.disable_initiator_tag = (gobject.timeout_add

494

(_timedelta_to_milliseconds

495

(timeout), self.disable))

496

self.expires = datetime.datetime.utcnow() + timeout

423

gobject.source_remove(self.disable_initiator_tag)

424

self.disable_initiator_tag = (gobject.timeout_add

425

(self.timeout_milliseconds(),

426

self.disable))

497

427

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def need_approval(self):

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self.last_approval_request = datetime.datetime.utcnow()

515

445

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

516

446

try:

517

447

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

518

except (AttributeError, OSError) as error:

448

except (AttributeError, OSError), error:

519

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if (isinstance(error, OSError)

520

450

and error.errno != errno.ECHILD):

521

451

raise error

539

469

'replace')))

540

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for attr in

541

471

self.runtime_expansions)

542

472

543

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try:

544

474

command = self.checker_command % escaped_attrs

545

except TypeError as error:

475

except TypeError, error:

546

476

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

547

477

' %s', self.checker_command, error)

548

478

return True # Try again later

567

497

if pid:

568

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback(pid, status, command)

570

except OSError as error:

500

except OSError, error:

571

501

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

572

502

error)

573

503

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

586

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#time.sleep(0.5)

587

517

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

588

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

589

except OSError as error:

519

except OSError, error:

590

520

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

591

521

raise

592

522

self.checker = None

593

523

594

# Encrypts a client secret and stores it in a varible encrypted_secret

595

def encrypt_secret(self, key):

596

# Encryption-key need to be of a specific size, so we hash inputed key

597

hasheng = hashlib.sha256()

598

hasheng.update(key)

599

encryptionkey = hasheng.digest()

600

601

# Create validation hash so we know at decryption if it was sucessful

602

hasheng = hashlib.sha256()

603

hasheng.update(self.secret)

604

validationhash = hasheng.digest()

605

606

# Encrypt secret

607

iv = os.urandom(Crypto.Cipher.AES.block_size)

608

ciphereng = Crypto.Cipher.AES.new(encryptionkey,

609

Crypto.Cipher.AES.MODE_CFB, iv)

610

ciphertext = ciphereng.encrypt(validationhash+self.secret)

611

self.encrypted_secret = (ciphertext, iv)

612

613

# Decrypt a encrypted client secret

614

def decrypt_secret(self, key):

615

# Decryption-key need to be of a specific size, so we hash inputed key

616

hasheng = hashlib.sha256()

617

hasheng.update(key)

618

encryptionkey = hasheng.digest()

619

620

# Decrypt encrypted secret

621

ciphertext, iv = self.encrypted_secret

622

ciphereng = Crypto.Cipher.AES.new(encryptionkey,

623

Crypto.Cipher.AES.MODE_CFB, iv)

624

plain = ciphereng.decrypt(ciphertext)

625

626

# Validate decrypted secret to know if it was succesful

627

hasheng = hashlib.sha256()

628

validationhash = plain[:hasheng.digest_size]

629

secret = plain[hasheng.digest_size:]

630

hasheng.update(secret)

631

632

# if validation fails, we use key as new secret. Otherwhise, we use

633

# the decrypted secret

634

if hasheng.digest() == validationhash:

635

self.secret = secret

636

else:

637

self.secret = key

638

del self.encrypted_secret

639

640

641

524

def dbus_service_property(dbus_interface, signature="v",

642

525

access="readwrite", byte_arrays=False):

643

526

"""Decorators for marking methods of a DBusObjectWithProperties to

689

572

690

573

class DBusObjectWithProperties(dbus.service.Object):

691

574

"""A D-Bus object with properties.

692

575

693

576

Classes inheriting from this can use the dbus_service_property

694

577

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

695

578

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

702

585

def _get_all_dbus_properties(self):

703

586

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

704

587

"""

705

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

706

for cls in self.__class__.__mro__

588

return ((prop._dbus_name, prop)

707

589

for name, prop in

708

inspect.getmembers(cls, self._is_dbus_property))

590

inspect.getmembers(self, self._is_dbus_property))

709

591

710

592

def _get_dbus_property(self, interface_name, property_name):

711

593

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

712

594

property with the specified name and interface.

713

595

"""

714

for cls in self.__class__.__mro__:

715

for name, value in (inspect.getmembers

716

(cls, self._is_dbus_property)):

717

if (value._dbus_name == property_name

718

and value._dbus_interface == interface_name):

719

return value.__get__(self)

720

596

for name in (property_name,

597

property_name + "_dbus_property"):

598

prop = getattr(self, name, None)

599

if (prop is None

600

or not self._is_dbus_property(prop)

601

or prop._dbus_name != property_name

602

or (interface_name and prop._dbus_interface

603

and interface_name != prop._dbus_interface)):

604

continue

605

return prop

721

606

# No such property

722

607

raise DBusPropertyNotFound(self.dbus_object_path + ":"

723

608

+ interface_name + "."

757

642

def GetAll(self, interface_name):

758

643

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

759

644

standard.

760

645

761

646

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

762

647

"""

763

648

all = {}

819

704

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

820

705

document.unlink()

821

706

except (AttributeError, xml.dom.DOMException,

822

xml.parsers.expat.ExpatError) as error:

707

xml.parsers.expat.ExpatError), error:

823

708

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

824

709

error)

825

710

return xmlstring

826

711

827

712

828

def datetime_to_dbus (dt, variant_level=0):

829

"""Convert a UTC datetime.datetime() to a D-Bus type."""

830

if dt is None:

831

return dbus.String("", variant_level = variant_level)

832

return dbus.String(dt.isoformat(),

833

variant_level=variant_level)

834

835

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

836

.__metaclass__):

837

"""Applied to an empty subclass of a D-Bus object, this metaclass

838

will add additional D-Bus attributes matching a certain pattern.

839

"""

840

def __new__(mcs, name, bases, attr):

841

# Go through all the base classes which could have D-Bus

842

# methods, signals, or properties in them

843

for base in (b for b in bases

844

if issubclass(b, dbus.service.Object)):

845

# Go though all attributes of the base class

846

for attrname, attribute in inspect.getmembers(base):

847

# Ignore non-D-Bus attributes, and D-Bus attributes

848

# with the wrong interface name

849

if (not hasattr(attribute, "_dbus_interface")

850

or not attribute._dbus_interface

851

.startswith("se.recompile.Mandos")):

852

continue

853

# Create an alternate D-Bus interface name based on

854

# the current name

855

alt_interface = (attribute._dbus_interface

856

.replace("se.recompile.Mandos",

857

"se.bsnet.fukt.Mandos"))

858

# Is this a D-Bus signal?

859

if getattr(attribute, "_dbus_is_signal", False):

860

# Extract the original non-method function by

861

# black magic

862

nonmethod_func = (dict(

863

zip(attribute.func_code.co_freevars,

864

attribute.__closure__))["func"]

865

.cell_contents)

866

# Create a new, but exactly alike, function

867

# object, and decorate it to be a new D-Bus signal

868

# with the alternate D-Bus interface name

869

new_function = (dbus.service.signal

870

(alt_interface,

871

attribute._dbus_signature)

872

(types.FunctionType(

873

nonmethod_func.func_code,

874

nonmethod_func.func_globals,

875

nonmethod_func.func_name,

876

nonmethod_func.func_defaults,

877

nonmethod_func.func_closure)))

878

# Define a creator of a function to call both the

879

# old and new functions, so both the old and new

880

# signals gets sent when the function is called

881

def fixscope(func1, func2):

882

"""This function is a scope container to pass

883

func1 and func2 to the "call_both" function

884

outside of its arguments"""

885

def call_both(*args, **kwargs):

886

"""This function will emit two D-Bus

887

signals by calling func1 and func2"""

888

func1(*args, **kwargs)

889

func2(*args, **kwargs)

890

return call_both

891

# Create the "call_both" function and add it to

892

# the class

893

attr[attrname] = fixscope(attribute,

894

new_function)

895

# Is this a D-Bus method?

896

elif getattr(attribute, "_dbus_is_method", False):

897

# Create a new, but exactly alike, function

898

# object. Decorate it to be a new D-Bus method

899

# with the alternate D-Bus interface name. Add it

900

# to the class.

901

attr[attrname] = (dbus.service.method

902

(alt_interface,

903

attribute._dbus_in_signature,

904

attribute._dbus_out_signature)

905

(types.FunctionType

906

(attribute.func_code,

907

attribute.func_globals,

908

attribute.func_name,

909

attribute.func_defaults,

910

attribute.func_closure)))

911

# Is this a D-Bus property?

912

elif getattr(attribute, "_dbus_is_property", False):

913

# Create a new, but exactly alike, function

914

# object, and decorate it to be a new D-Bus

915

# property with the alternate D-Bus interface

916

# name. Add it to the class.

917

attr[attrname] = (dbus_service_property

918

(alt_interface,

919

attribute._dbus_signature,

920

attribute._dbus_access,

921

attribute

922

._dbus_get_args_options

923

["byte_arrays"])

924

(types.FunctionType

925

(attribute.func_code,

926

attribute.func_globals,

927

attribute.func_name,

928

attribute.func_defaults,

929

attribute.func_closure)))

930

return type.__new__(mcs, name, bases, attr)

931

932

713

class ClientDBus(Client, DBusObjectWithProperties):

933

714

"""A Client class using D-Bus

934

715

943

724

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

944

725

945

726

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

727

self._approvals_pending = 0

946

728

self.bus = bus

947

729

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

948

949

self._approvals_pending = 0

950

730

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

951

731

# the D-Bus

952

732

client_object_name = unicode(self.name).translate(

957

737

DBusObjectWithProperties.__init__(self, self.bus,

958

738

self.dbus_object_path)

959

739

960

def notifychangeproperty(transform_func,

961

dbus_name, type_func=lambda x: x,

962

variant_level=1):

963

""" Modify a variable so that it's a property which announces

964

its changes to DBus.

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)

965

751

966

transform_fun: Function that takes a value and a variant_level

967

and transforms it to a D-Bus type.

968

dbus_name: D-Bus name of the variable

969

type_func: Function that transform the value before sending it

970

to the D-Bus. Default: no transform

971

variant_level: D-Bus variant level. Default: 1

972

"""

973

attrname = "_{0}".format(dbus_name)

974

def setter(self, value):

975

if hasattr(self, "dbus_object_path"):

976

if (not hasattr(self, attrname) or

977

type_func(getattr(self, attrname, None))

978

!= type_func(value)):

979

dbus_value = transform_func(type_func(value),

980

variant_level

981

=variant_level)

982

self.PropertyChanged(dbus.String(dbus_name),

983

dbus_value)

984

setattr(self, attrname, value)

985

986

return property(lambda self: getattr(self, attrname), setter)

987

988

989

expires = notifychangeproperty(datetime_to_dbus, "Expires")

990

approvals_pending = notifychangeproperty(dbus.Boolean,

991

"ApprovalPending",

992

type_func = bool)

993

enabled = notifychangeproperty(dbus.Boolean, "Enabled")

994

last_enabled = notifychangeproperty(datetime_to_dbus,

995

"LastEnabled")

996

checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",

997

type_func = lambda checker:

998

checker is not None)

999

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1000

"LastCheckedOK")

1001

last_approval_request = notifychangeproperty(

1002

datetime_to_dbus, "LastApprovalRequest")

1003

approved_by_default = notifychangeproperty(dbus.Boolean,

1004

"ApprovedByDefault")

1005

approval_delay = notifychangeproperty(dbus.UInt16,

1006

"ApprovalDelay",

1007

type_func =

1008

_timedelta_to_milliseconds)

1009

approval_duration = notifychangeproperty(

1010

dbus.UInt16, "ApprovalDuration",

1011

type_func = _timedelta_to_milliseconds)

1012

host = notifychangeproperty(dbus.String, "Host")

1013

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

1014

type_func =

1015

_timedelta_to_milliseconds)

1016

extended_timeout = notifychangeproperty(

1017

dbus.UInt16, "ExtendedTimeout",

1018

type_func = _timedelta_to_milliseconds)

1019

interval = notifychangeproperty(dbus.UInt16,

1020

"Interval",

1021

type_func =

1022

_timedelta_to_milliseconds)

1023

checker_command = notifychangeproperty(dbus.String, "Checker")

1024

1025

del notifychangeproperty

752

approvals_pending = property(_get_approvals_pending,

753

_set_approvals_pending)

754

del _get_approvals_pending, _set_approvals_pending

755

756

@staticmethod

757

def _datetime_to_dbus(dt, variant_level=0):

758

"""Convert a UTC datetime.datetime() to a D-Bus type."""

759

return dbus.String(dt.isoformat(),

760

variant_level=variant_level)

761

762

def enable(self):

763

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

764

r = Client.enable(self)

765

if oldstate != self.enabled:

766

# Emit D-Bus signals

767

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

768

dbus.Boolean(True, variant_level=1))

769

self.PropertyChanged(

770

dbus.String("LastEnabled"),

771

self._datetime_to_dbus(self.last_enabled,

772

variant_level=1))

773

return r

774

775

def disable(self, quiet = False):

776

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

777

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

778

if not quiet and oldstate != self.enabled:

779

# Emit D-Bus signal

780

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

781

dbus.Boolean(False, variant_level=1))

782

return r

1026

783

1027

784

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

1028

785

try:

1037

794

*args, **kwargs):

1038

795

self.checker_callback_tag = None

1039

796

self.checker = None

797

# Emit D-Bus signal

798

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

799

dbus.Boolean(False, variant_level=1))

1040

800

if os.WIFEXITED(condition):

1041

801

exitstatus = os.WEXITSTATUS(condition)

1042

802

# Emit D-Bus signal

1052

812

return Client.checker_callback(self, pid, condition, command,

1053

813

*args, **kwargs)

1054

814

815

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

816

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

817

# Emit D-Bus signal

818

self.PropertyChanged(

819

dbus.String("LastCheckedOK"),

820

(self._datetime_to_dbus(self.last_checked_ok,

821

variant_level=1)))

822

return r

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

1055

833

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

1056

834

old_checker = self.checker

1057

835

if self.checker is not None:

1064

842

and old_checker_pid != self.checker.pid):

1065

843

# Emit D-Bus signal

1066

844

self.CheckerStarted(self.current_checker_command)

845

self.PropertyChanged(

846

dbus.String("CheckerRunning"),

847

dbus.Boolean(True, variant_level=1))

1067

848

return r

1068

849

850

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

851

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

852

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

853

if (old_checker is not None

854

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

855

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

856

dbus.Boolean(False, variant_level=1))

857

return r

858

1069

859

def _reset_approved(self):

1070

860

self._approved = None

1071

861

return False

1073

863

def approve(self, value=True):

1074

864

self.send_changedstate()

1075

865

self._approved = value

1076

gobject.timeout_add(_timedelta_to_milliseconds

866

gobject.timeout_add(self._timedelta_to_milliseconds

1077

867

(self.approval_duration),

1078

868

self._reset_approved)

1079

869

1080

870

1081

871

## D-Bus methods, signals & properties

1082

_interface = "se.recompile.Mandos.Client"

872

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

1083

873

1084

874

## Signals

1085

875

1132

922

# CheckedOK - method

1133

923

@dbus.service.method(_interface)

1134

924

def CheckedOK(self):

1135

self.checked_ok()

925

return self.checked_ok()

1136

926

1137

927

# Enable - method

1138

928

@dbus.service.method(_interface)

1171

961

if value is None: # get

1172

962

return dbus.Boolean(self.approved_by_default)

1173

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))

1174

967

1175

968

# ApprovalDelay - property

1176

969

@dbus_service_property(_interface, signature="t",

1179

972

if value is None: # get

1180

973

return dbus.UInt64(self.approval_delay_milliseconds())

1181

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))

1182

978

1183

979

# ApprovalDuration - property

1184

980

@dbus_service_property(_interface, signature="t",

1185

981

access="readwrite")

1186

982

def ApprovalDuration_dbus_property(self, value=None):

1187

983

if value is None: # get

1188

return dbus.UInt64(_timedelta_to_milliseconds(

984

return dbus.UInt64(self._timedelta_to_milliseconds(

1189

985

self.approval_duration))

1190

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))

1191

990

1192

991

# Name - property

1193

992

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

1206

1005

if value is None: # get

1207

1006

return dbus.String(self.host)

1208

1007

self.host = value

1008

# Emit D-Bus signal

1009

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

1010

dbus.String(value, variant_level=1))

1209

1011

1210

1012

# Created - property

1211

1013

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

1212

1014

def Created_dbus_property(self):

1213

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

1015

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

1214

1016

1215

1017

# LastEnabled - property

1216

1018

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

1217

1019

def LastEnabled_dbus_property(self):

1218

return datetime_to_dbus(self.last_enabled)

1020

if self.last_enabled is None:

1021

return dbus.String("")

1022

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

1219

1023

1220

1024

# Enabled - property

1221

1025

@dbus_service_property(_interface, signature="b",

1235

1039

if value is not None:

1236

1040

self.checked_ok()

1237

1041

return

1238

return datetime_to_dbus(self.last_checked_ok)

1239

1240

# Expires - property

1241

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

1242

def Expires_dbus_property(self):

1243

return datetime_to_dbus(self.expires)

1042

if self.last_checked_ok is None:

1043

return dbus.String("")

1044

return dbus.String(self._datetime_to_dbus(self

1045

.last_checked_ok))

1244

1046

1245

1047

# LastApprovalRequest - property

1246

1048

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

1247

1049

def LastApprovalRequest_dbus_property(self):

1248

return datetime_to_dbus(self.last_approval_request)

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))

1249

1055

1250

1056

# Timeout - property

1251

1057

@dbus_service_property(_interface, signature="t",

1254

1060

if value is None: # get

1255

1061

return dbus.UInt64(self.timeout_milliseconds())

1256

1062

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

1063

# Emit D-Bus signal

1064

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

1065

dbus.UInt64(value, variant_level=1))

1257

1066

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

1258

1067

return

1259

1068

# Reschedule timeout

1260

1069

gobject.source_remove(self.disable_initiator_tag)

1261

1070

self.disable_initiator_tag = None

1262

self.expires = None

1263

time_to_die = _timedelta_to_milliseconds((self

1264

.last_checked_ok

1265

+ self.timeout)

1266

- datetime.datetime

1267

.utcnow())

1071

time_to_die = (self.

1072

_timedelta_to_milliseconds((self

1073

.last_checked_ok

1074

+ self.timeout)

1075

- datetime.datetime

1076

.utcnow()))

1268

1077

if time_to_die <= 0:

1269

1078

# The timeout has passed

1270

1079

self.disable()

1271

1080

else:

1272

self.expires = (datetime.datetime.utcnow()

1273

+ datetime.timedelta(milliseconds =

1274

time_to_die))

1275

1081

self.disable_initiator_tag = (gobject.timeout_add

1276

1082

(time_to_die, self.disable))

1277

1083

1278

# ExtendedTimeout - property

1279

@dbus_service_property(_interface, signature="t",

1280

access="readwrite")

1281

def ExtendedTimeout_dbus_property(self, value=None):

1282

if value is None: # get

1283

return dbus.UInt64(self.extended_timeout_milliseconds())

1284

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

1285

1286

1084

# Interval - property

1287

1085

@dbus_service_property(_interface, signature="t",

1288

1086

access="readwrite")

1290

1088

if value is None: # get

1291

1089

return dbus.UInt64(self.interval_milliseconds())

1292

1090

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

1091

# Emit D-Bus signal

1092

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

1093

dbus.UInt64(value, variant_level=1))

1293

1094

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

1294

1095

return

1295

1096

# Reschedule checker run

1297

1098

self.checker_initiator_tag = (gobject.timeout_add

1298

1099

(value, self.start_checker))

1299

1100

self.start_checker() # Start one now, too

1300

1101

1301

1102

# Checker - property

1302

1103

@dbus_service_property(_interface, signature="s",

1303

1104

access="readwrite")

1305

1106

if value is None: # get

1306

1107

return dbus.String(self.checker_command)

1307

1108

self.checker_command = value

1109

# Emit D-Bus signal

1110

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

1111

dbus.String(self.checker_command,

1112

variant_level=1))

1308

1113

1309

1114

# CheckerRunning - property

1310

1115

@dbus_service_property(_interface, signature="b",

1337

1142

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

1338

1143

if not self._pipe.recv():

1339

1144

raise KeyError()

1340

1145

1341

1146

def __getattribute__(self, name):

1342

1147

if(name == '_pipe'):

1343

1148

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

1350

1155

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

1351

1156

return self._pipe.recv()[1]

1352

1157

return func

1353

1158

1354

1159

def __setattr__(self, name, value):

1355

1160

if(name == '_pipe'):

1356

1161

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

1357

1162

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

1358

1163

1359

class ClientDBusTransitional(ClientDBus):

1360

__metaclass__ = AlternateDBusNamesMetaclass

1361

1164

1362

1165

class ClientHandler(socketserver.BaseRequestHandler, object):

1363

1166

"""A class to handle client connections.

1371

1174

unicode(self.client_address))

1372

1175

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

1373

1176

self.server.child_pipe.fileno())

1374

1177

1375

1178

session = (gnutls.connection

1376

1179

.ClientSession(self.request,

1377

1180

gnutls.connection

1378

1181

.X509Credentials()))

1379

1182

1380

1183

# Note: gnutls.connection.X509Credentials is really a

1381

1184

# generic GnuTLS certificate credentials object so long as

1382

1185

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

1383

1186

# here despite using OpenPGP certificates.

1384

1187

1385

1188

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

1386

1189

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

1387

1190

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

1393

1196

(gnutls.library.functions

1394

1197

.gnutls_priority_set_direct(session._c_object,

1395

1198

priority, None))

1396

1199

1397

1200

# Start communication using the Mandos protocol

1398

1201

# Get protocol number

1399

1202

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

1401

1204

try:

1402

1205

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

1403

1206

raise RuntimeError

1404

except (ValueError, IndexError, RuntimeError) as error:

1207

except (ValueError, IndexError, RuntimeError), error:

1405

1208

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

1406

1209

return

1407

1210

1408

1211

# Start GnuTLS connection

1409

1212

try:

1410

1213

session.handshake()

1411

except gnutls.errors.GNUTLSError as error:

1214

except gnutls.errors.GNUTLSError, error:

1412

1215

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

1413

1216

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

1414

1217

# established. Just abandon the request.

1415

1218

return

1416

1219

logger.debug("Handshake succeeded")

1417

1220

1418

1221

approval_required = False

1419

1222

try:

1420

1223

try:

1421

1224

fpr = self.fingerprint(self.peer_certificate

1422

1225

(session))

1423

except (TypeError,

1424

gnutls.errors.GNUTLSError) as error:

1226

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

1425

1227

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

1426

1228

return

1427

1229

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

1428

1230

1429

1231

try:

1430

1232

client = ProxyClient(child_pipe, fpr,

1431

1233

self.client_address)

1439

1241

1440

1242

while True:

1441

1243

if not client.enabled:

1442

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

1244

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

1443

1245

client.name)

1444

1246

if self.server.use_dbus:

1445

1247

# Emit D-Bus signal

1446

client.Rejected("Disabled")

1248

client.Rejected("Disabled")

1447

1249

return

1448

1250

1449

1251

if client._approved or not client.approval_delay:

1466

1268

return

1467

1269

1468

1270

#wait until timeout or approved

1271

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

1469

1272

time = datetime.datetime.now()

1470

1273

client.changedstate.acquire()

1471

(client.changedstate.wait

1472

(float(client._timedelta_to_milliseconds(delay)

1473

/ 1000)))

1274

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

1474

1275

client.changedstate.release()

1475

1276

time2 = datetime.datetime.now()

1476

1277

if (time2 - time) >= delay:

1491

1292

while sent_size < len(client.secret):

1492

1293

try:

1493

1294

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

1494

except gnutls.errors.GNUTLSError as error:

1295

except (gnutls.errors.GNUTLSError), error:

1495

1296

logger.warning("gnutls send failed")

1496

1297

return

1497

1298

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

1498

1299

sent, len(client.secret)

1499

1300

- (sent_size + sent))

1500

1301

sent_size += sent

1501

1302

1502

1303

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

1503

# bump the timeout using extended_timeout

1504

client.checked_ok(client.extended_timeout)

1304

# bump the timeout as if seen

1305

client.checked_ok()

1505

1306

if self.server.use_dbus:

1506

1307

# Emit D-Bus signal

1507

1308

client.GotSecret()

1511

1312

client.approvals_pending -= 1

1512

1313

try:

1513

1314

session.bye()

1514

except gnutls.errors.GNUTLSError as error:

1315

except (gnutls.errors.GNUTLSError), error:

1515

1316

logger.warning("GnuTLS bye failed")

1516

1317

1517

1318

@staticmethod

1586

1387

except:

1587

1388

self.handle_error(request, address)

1588

1389

self.close_request(request)

1589

1390

1590

1391

def process_request(self, request, address):

1591

1392

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

1592

proc = multiprocessing.Process(target = self.sub_process_main,

1593

args = (request,

1594

address))

1595

proc.start()

1596

return proc

1597

1393

multiprocessing.Process(target = self.sub_process_main,

1394

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

1598

1395

1599

1396

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1600

1397

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

1604

1401

This function creates a new pipe in self.pipe

1605

1402

"""

1606

1403

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1607

1608

proc = MultiprocessingMixIn.process_request(self, request,

1609

client_address)

1404

1405

super(MultiprocessingMixInWithPipe,

1406

self).process_request(request, client_address)

1610

1407

self.child_pipe.close()

1611

self.add_pipe(parent_pipe, proc)

1612

1613

def add_pipe(self, parent_pipe, proc):

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

1614

1411

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

1615

1412

raise NotImplementedError

1616

1413

1617

1618

1414

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1619

1415

socketserver.TCPServer, object):

1620

1416

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

1646

1442

SO_BINDTODEVICE,

1647

1443

str(self.interface

1648

1444

+ '\0'))

1649

except socket.error as error:

1445

except socket.error, error:

1650

1446

if error[0] == errno.EPERM:

1651

1447

logger.error("No permission to"

1652

1448

" bind to interface %s",

1694

1490

self.enabled = False

1695

1491

self.clients = clients

1696

1492

if self.clients is None:

1697

self.clients = {}

1493

self.clients = set()

1698

1494

self.use_dbus = use_dbus

1699

1495

self.gnutls_priority = gnutls_priority

1700

1496

IPv6_TCPServer.__init__(self, server_address,

1704

1500

def server_activate(self):

1705

1501

if self.enabled:

1706

1502

return socketserver.TCPServer.server_activate(self)

1707

1708

1503

def enable(self):

1709

1504

self.enabled = True

1710

1711

def add_pipe(self, parent_pipe, proc):

1505

def add_pipe(self, parent_pipe):

1712

1506

# Call "handle_ipc" for both data and EOF events

1713

1507

gobject.io_add_watch(parent_pipe.fileno(),

1714

1508

gobject.IO_IN | gobject.IO_HUP,

1715

1509

functools.partial(self.handle_ipc,

1716

parent_pipe =

1717

parent_pipe,

1718

proc = proc))

1719

1510

parent_pipe = parent_pipe))

1511

1720

1512

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

1721

proc = None, client_object=None):

1513

client_object=None):

1722

1514

condition_names = {

1723

1515

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

1724

1516

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

1733

1525

for cond, name in

1734

1526

condition_names.iteritems()

1735

1527

if cond & condition)

1736

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

1528

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

1737

1529

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

1738

# Wait for other process to exit

1739

proc.join()

1740

1530

return False

1741

1531

1742

1532

# Read a request from the child

1747

1537

fpr = request[1]

1748

1538

address = request[2]

1749

1539

1750

for c in self.clients.itervalues():

1540

for c in self.clients:

1751

1541

if c.fingerprint == fpr:

1752

1542

client = c

1753

1543

break

1754

1544

else:

1755

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

1756

"dress: %s", fpr, address)

1545

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

1546

"dress: %s", fpr, address)

1757

1547

if self.use_dbus:

1758

1548

# Emit D-Bus signal

1759

mandos_dbus_service.ClientNotFound(fpr,

1760

address[0])

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

1761

1550

parent_pipe.send(False)

1762

1551

return False

1763

1552

1764

1553

gobject.io_add_watch(parent_pipe.fileno(),

1765

1554

gobject.IO_IN | gobject.IO_HUP,

1766

1555

functools.partial(self.handle_ipc,

1767

parent_pipe =

1768

parent_pipe,

1769

proc = proc,

1770

client_object =

1771

client))

1556

parent_pipe = parent_pipe,

1557

client_object = client))

1772

1558

parent_pipe.send(True)

1773

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

1774

# same fileno

1559

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

1775

1560

return False

1776

1561

if command == 'funcall':

1777

1562

funcname = request[1]

1778

1563

args = request[2]

1779

1564

kwargs = request[3]

1780

1565

1781

parent_pipe.send(('data', getattr(client_object,

1782

funcname)(*args,

1783

**kwargs)))

1784

1566

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

1567

1785

1568

if command == 'getattr':

1786

1569

attrname = request[1]

1787

1570

if callable(client_object.__getattribute__(attrname)):

1788

1571

parent_pipe.send(('function',))

1789

1572

else:

1790

parent_pipe.send(('data', client_object

1791

.__getattribute__(attrname)))

1573

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

1792

1574

1793

1575

if command == 'setattr':

1794

1576

attrname = request[1]

1795

1577

value = request[2]

1796

1578

setattr(client_object, attrname, value)

1797

1579

1798

1580

return True

1799

1581

1800

1582

1831

1613

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

1832

1614

else:

1833

1615

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

1834

except (ValueError, IndexError) as e:

1616

except (ValueError, IndexError), e:

1835

1617

raise ValueError(*(e.args))

1836

1618

timevalue += delta

1837

1619

return timevalue

1921

1703

" system bus interface")

1922

1704

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

1923

1705

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

1924

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

1925

dest="restore", help="Do not restore stored state",

1926

default=True)

1927

1928

1706

options = parser.parse_args()

1929

1707

1930

1708

if options.check:

1965

1743

# options, if set.

1966

1744

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

1967

1745

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

1968

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

1746

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

1969

1747

value = getattr(options, option)

1970

1748

if value is not None:

1971

1749

server_settings[option] = value

1983

1761

debuglevel = server_settings["debuglevel"]

1984

1762

use_dbus = server_settings["use_dbus"]

1985

1763

use_ipv6 = server_settings["use_ipv6"]

1986

1764

1987

1765

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

1988

1766

syslogger.setFormatter(logging.Formatter

1989

1767

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

1991

1769

% server_settings["servicename"]))

1992

1770

1993

1771

# Parse config file with clients

1994

client_defaults = { "timeout": "5m",

1995

"extended_timeout": "15m",

1996

"interval": "2m",

1772

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

1773

"interval": "5m",

1997

1774

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

1998

1775

"host": "",

1999

1776

"approval_delay": "0s",

2039

1816

try:

2040

1817

os.setgid(gid)

2041

1818

os.setuid(uid)

2042

except OSError as error:

1819

except OSError, error:

2043

1820

if error[0] != errno.EPERM:

2044

1821

raise error

2045

1822

2046

1823

if not debug and not debuglevel:

2047

logger.setLevel(logging.WARNING)

1824

syslogger.setLevel(logging.WARNING)

1825

console.setLevel(logging.WARNING)

2048

1826

if debuglevel:

2049

1827

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

2050

logger.setLevel(level)

2051

1828

syslogger.setLevel(level)

1829

console.setLevel(level)

1830

2052

1831

if debug:

2053

logger.setLevel(logging.DEBUG)

2054

1832

# Enable all possible GnuTLS debugging

2055

1833

2056

1834

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

2086

1864

# End of Avahi example code

2087

1865

if use_dbus:

2088

1866

try:

2089

bus_name = dbus.service.BusName("se.recompile.Mandos",

1867

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

2090

1868

bus, do_not_queue=True)

2091

old_bus_name = (dbus.service.BusName

2092

("se.bsnet.fukt.Mandos", bus,

2093

do_not_queue=True))

2094

except dbus.exceptions.NameExistsException as e:

1869

except dbus.exceptions.NameExistsException, e:

2095

1870

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

2096

1871

use_dbus = False

2097

1872

server_settings["use_dbus"] = False

2098

1873

tcp_server.use_dbus = False

2099

1874

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2100

service = AvahiServiceToSyslog(name =

2101

server_settings["servicename"],

2102

servicetype = "_mandos._tcp",

2103

protocol = protocol, bus = bus)

1875

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

1876

servicetype = "_mandos._tcp",

1877

protocol = protocol, bus = bus)

2104

1878

if server_settings["interface"]:

2105

1879

service.interface = (if_nametoindex

2106

1880

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

2110

1884

2111

1885

client_class = Client

2112

1886

if use_dbus:

2113

client_class = functools.partial(ClientDBusTransitional,

2114

bus = bus)

2115

2116

special_settings = {

2117

# Some settings need to be accessd by special methods;

2118

# booleans need .getboolean(), etc. Here is a list of them:

2119

"approved_by_default":

2120

lambda section:

2121

client_config.getboolean(section, "approved_by_default"),

2122

}

2123

# Construct a new dict of client settings of this form:

2124

# { client_name: {setting_name: value, ...}, ...}

2125

# with exceptions for any special settings as defined above

2126

client_settings = dict((clientname,

2127

dict((setting,

2128

(value if setting not in special_settings

2129

else special_settings[setting](clientname)))

2130

for setting, value in client_config.items(clientname)))

2131

for clientname in client_config.sections())

2132

2133

old_client_settings = {}

2134

clients_data = []

2135

2136

# Get client data and settings from last running state.

2137

if server_settings["restore"]:

2138

try:

2139

with open(stored_state_path, "rb") as stored_state:

2140

clients_data, old_client_settings = pickle.load(stored_state)

2141

os.remove(stored_state_path)

2142

except IOError as e:

2143

logger.warning("Could not load persistant state: {0}".format(e))

2144

if e.errno != errno.ENOENT:

2145

raise

2146

2147

for client in clients_data:

2148

client_name = client["name"]

2149

2150

# Decide which value to use after restoring saved state.

2151

# We have three different values: Old config file,

2152

# new config file, and saved state.

2153

# New config value takes precedence if it differs from old

2154

# config value, otherwise use saved state.

2155

for name, value in client_settings[client_name].items():

1887

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

1888

def client_config_items(config, section):

1889

special_settings = {

1890

"approved_by_default":

1891

lambda: config.getboolean(section,

1892

"approved_by_default"),

1893

}

1894

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

2156

1895

try:

2157

# For each value in new config, check if it differs

2158

# from the old config value (Except for the "secret"

2159

# attribute)

2160

if name != "secret" and value != old_client_settings[client_name][name]:

2161

setattr(client, name, value)

1896

yield (name, special_settings[name]())

2162

1897

except KeyError:

2163

pass

2164

2165

# Clients who has passed its expire date, can still be enabled if its

2166

# last checker was sucessful. Clients who checkers failed before we

2167

# stored it state is asumed to had failed checker during downtime.

2168

if client["enabled"] and client["last_checked_ok"]:

2169

if ((datetime.datetime.utcnow() - client["last_checked_ok"])

2170

> client["interval"]):

2171

if client["last_checker_status"] != 0:

2172

client["enabled"] = False

2173

else:

2174

client["expires"] = datetime.datetime.utcnow() + client["timeout"]

2175

2176

client["changedstate"] = (multiprocessing_manager

2177

.Condition(multiprocessing_manager

2178

.Lock()))

2179

if use_dbus:

2180

new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)

2181

tcp_server.clients[client_name] = new_client

2182

new_client.bus = bus

2183

for name, value in client.iteritems():

2184

setattr(new_client, name, value)

2185

client_object_name = unicode(client_name).translate(

2186

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

2187

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

2188

new_client.dbus_object_path = (dbus.ObjectPath

2189

("/clients/" + client_object_name))

2190

DBusObjectWithProperties.__init__(new_client,

2191

new_client.bus,

2192

new_client.dbus_object_path)

2193

else:

2194

tcp_server.clients[client_name] = Client.__new__(Client)

2195

for name, value in client.iteritems():

2196

setattr(tcp_server.clients[client_name], name, value)

2197

2198

tcp_server.clients[client_name].decrypt_secret(

2199

client_settings[client_name]["secret"])

2200

2201

# Create/remove clients based on new changes made to config

2202

for clientname in set(old_client_settings) - set(client_settings):

2203

del tcp_server.clients[clientname]

2204

for clientname in set(client_settings) - set(old_client_settings):

2205

tcp_server.clients[clientname] = (client_class(name = clientname,

2206

config =

2207

client_settings

2208

[clientname]))

1898

yield (name, value)

2209

1899

2210

1900

tcp_server.clients.update(set(

1901

client_class(name = section,

1902

config= dict(client_config_items(

1903

client_config, section)))

1904

for section in client_config.sections()))

2211

1905

if not tcp_server.clients:

2212

1906

logger.warning("No clients defined")

2213

1907

2226

1920

del pidfilename

2227

1921

2228

1922

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

2229

1923

2230

1924

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

2231

1925

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

2232

1926

2235

1929

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

2236

1930

def __init__(self):

2237

1931

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

2238

_interface = "se.recompile.Mandos"

1932

_interface = "se.bsnet.fukt.Mandos"

2239

1933

2240

1934

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

2241

1935

def ClientAdded(self, objpath):

2256

1950

def GetAllClients(self):

2257

1951

"D-Bus method"

2258

1952

return dbus.Array(c.dbus_object_path

2259

for c in

2260

tcp_server.clients.itervalues())

1953

for c in tcp_server.clients)

2261

1954

2262

1955

@dbus.service.method(_interface,

2263

1956

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

2265

1958

"D-Bus method"

2266

1959

return dbus.Dictionary(

2267

1960

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

2268

for c in tcp_server.clients.itervalues()),

1961

for c in tcp_server.clients),

2269

1962

signature="oa{sv}")

2270

1963

2271

1964

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

2272

1965

def RemoveClient(self, object_path):

2273

1966

"D-Bus method"

2274

for c in tcp_server.clients.itervalues():

1967

for c in tcp_server.clients:

2275

1968

if c.dbus_object_path == object_path:

2276

del tcp_server.clients[c.name]

1969

tcp_server.clients.remove(c)

2277

1970

c.remove_from_connection()

2278

1971

# Don't signal anything except ClientRemoved

2279

1972

c.disable(quiet=True)

2284

1977

2285

1978

del _interface

2286

1979

2287

class MandosDBusServiceTransitional(MandosDBusService):

2288

__metaclass__ = AlternateDBusNamesMetaclass

2289

mandos_dbus_service = MandosDBusServiceTransitional()

1980

mandos_dbus_service = MandosDBusService()

2290

1981

2291

1982

def cleanup():

2292

1983

"Cleanup function; run on exit"

2293

1984

service.cleanup()

2294

1985

2295

multiprocessing.active_children()

2296

if not (tcp_server.clients or client_settings):

2297

return

2298

2299

# Store client before exiting. Secrets are encrypted with key based

2300

# on what config file has. If config file is removed/edited, old

2301

# secret will thus be unrecovable.

2302

clients = []

2303

for client in tcp_server.clients.itervalues():

2304

client.encrypt_secret(client_settings[client.name]["secret"])

2305

2306

client_dict = {}

2307

2308

# A list of attributes that will not be stored when shuting down.

2309

exclude = set(("bus", "changedstate", "secret"))

2310

for name, typ in inspect.getmembers(dbus.service.Object):

2311

exclude.add(name)

2312

2313

client_dict["encrypted_secret"] = client.encrypted_secret

2314

for attr in client.client_structure:

2315

if attr not in exclude:

2316

client_dict[attr] = getattr(client, attr)

2317

2318

clients.append(client_dict)

2319

del client_settings[client.name]["secret"]

2320

2321

try:

2322

with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:

2323

pickle.dump((clients, client_settings), stored_state)

2324

except IOError as e:

2325

logger.warning("Could not save persistant state: {0}".format(e))

2326

if e.errno != errno.ENOENT:

2327

raise

2328

2329

# Delete all clients, and settings from config

2330

1986

while tcp_server.clients:

2331

name, client = tcp_server.clients.popitem()

1987

client = tcp_server.clients.pop()

2332

1988

if use_dbus:

2333

1989

client.remove_from_connection()

1990

client.disable_hook = None

2334

1991

# Don't signal anything except ClientRemoved

2335

1992

client.disable(quiet=True)

2336

1993

if use_dbus:

2337

1994

# Emit D-Bus signal

2338

mandos_dbus_service.ClientRemoved(client

2339

.dbus_object_path,

1995

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2340

1996

client.name)

2341

client_settings.clear()

2342

1997

2343

1998

atexit.register(cleanup)

2344

1999

2345

for client in tcp_server.clients.itervalues():

2000

for client in tcp_server.clients:

2346

2001

if use_dbus:

2347

2002

# Emit D-Bus signal

2348

2003

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2349

# Need to initiate checking of clients

2350

if client.enabled:

2351

client.init_checker()

2352

2004

client.enable()

2353

2005

2354

2006

tcp_server.enable()

2355

2007

tcp_server.server_activate()

2370

2022

# From the Avahi example code

2371

2023

try:

2372

2024

service.activate()

2373

except dbus.exceptions.DBusException as error:

2025

except dbus.exceptions.DBusException, error:

2374

2026

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

2375

2027

cleanup()

2376

2028

sys.exit(1)

2383

2035

2384

2036

logger.debug("Starting main loop")

2385

2037

main_loop.run()

2386

except AvahiError as error:

2038

except AvahiError, error:

2387

2039

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

2388

2040

cleanup()

2389

2041

sys.exit(1)

2395

2047

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

2396

2048

cleanup()

2397

2049

2398

2399

2050

if __name__ == '__main__':

2400

2051

main()