/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2009-08-30 03:10:29 UTC
  • Revision ID: teddy@fukt.bsnet.se-20090830031029-cj8po3rc4g1cux1d
* mandos: White-space fixes only.
* mandos-ctl: - '' -
* plugin-runner.c: - '' -
* plugins.d/askpass-fifo.c: - '' -
* plugins.d/mandos-client.c: - '' -
* plugins.d/password-prompt.c: - '' -

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import logging
56
56
import logging.handlers
57
57
import pwd
58
 
import contextlib
 
58
from contextlib import closing
59
59
import struct
60
60
import fcntl
61
61
import functools
62
 
import cPickle as pickle
63
 
import multiprocessing
64
62
 
65
63
import dbus
66
64
import dbus.service
69
67
from dbus.mainloop.glib import DBusGMainLoop
70
68
import ctypes
71
69
import ctypes.util
72
 
import xml.dom.minidom
73
 
import inspect
74
70
 
75
71
try:
76
72
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
81
77
        SO_BINDTODEVICE = None
82
78
 
83
79
 
84
 
version = "1.0.14"
 
80
version = "1.0.11"
85
81
 
86
 
#logger = logging.getLogger(u'mandos')
87
82
logger = logging.Logger(u'mandos')
88
83
syslogger = (logging.handlers.SysLogHandler
89
84
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
179
174
                                    self.server.EntryGroupNew()),
180
175
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
181
176
            self.group.connect_to_signal('StateChanged',
182
 
                                         self
183
 
                                         .entry_group_state_changed)
 
177
                                         self.entry_group_state_changed)
184
178
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
185
179
                     self.name, self.type)
186
180
        self.group.AddService(
245
239
    enabled:    bool()
246
240
    last_checked_ok: datetime.datetime(); (UTC) or None
247
241
    timeout:    datetime.timedelta(); How long from last_checked_ok
248
 
                                      until this client is disabled
 
242
                                      until this client is invalid
249
243
    interval:   datetime.timedelta(); How often to start a new checker
250
244
    disable_hook:  If set, called by disable() as disable_hook(self)
251
245
    checker:    subprocess.Popen(); a running checker process used
252
246
                                    to see if the client lives.
253
247
                                    'None' if no process is running.
254
248
    checker_initiator_tag: a gobject event source tag, or None
255
 
    disable_initiator_tag: - '' -
 
249
    disable_initiator_tag:    - '' -
256
250
    checker_callback_tag:  - '' -
257
251
    checker_command: string; External command which is run to check if
258
252
                     client lives.  %() expansions are done at
259
253
                     runtime with vars(self) as dict, so that for
260
254
                     instance %(name)s can be used in the command.
261
255
    current_checker_command: string; current running checker_command
262
 
    approved_delay: datetime.timedelta(); Time to wait for approval
263
 
    _approved:   bool(); 'None' if not yet approved/disapproved
264
 
    approved_duration: datetime.timedelta(); Duration of one approval
265
256
    """
266
257
    
267
258
    @staticmethod
268
 
    def _timedelta_to_milliseconds(td):
269
 
        "Convert a datetime.timedelta() to milliseconds"
270
 
        return ((td.days * 24 * 60 * 60 * 1000)
271
 
                + (td.seconds * 1000)
272
 
                + (td.microseconds // 1000))
 
259
    def _datetime_to_milliseconds(dt):
 
260
        "Convert a datetime.datetime() to milliseconds"
 
261
        return ((dt.days * 24 * 60 * 60 * 1000)
 
262
                + (dt.seconds * 1000)
 
263
                + (dt.microseconds // 1000))
273
264
    
274
265
    def timeout_milliseconds(self):
275
266
        "Return the 'timeout' attribute in milliseconds"
276
 
        return self._timedelta_to_milliseconds(self.timeout)
 
267
        return self._datetime_to_milliseconds(self.timeout)
277
268
    
278
269
    def interval_milliseconds(self):
279
270
        "Return the 'interval' attribute in milliseconds"
280
 
        return self._timedelta_to_milliseconds(self.interval)
281
 
 
282
 
    def approved_delay_milliseconds(self):
283
 
        return self._timedelta_to_milliseconds(self.approved_delay)
 
271
        return self._datetime_to_milliseconds(self.interval)
284
272
    
285
273
    def __init__(self, name = None, disable_hook=None, config=None):
286
274
        """Note: the 'checker' key in 'config' sets the
299
287
        if u"secret" in config:
300
288
            self.secret = config[u"secret"].decode(u"base64")
301
289
        elif u"secfile" in config:
302
 
            with open(os.path.expanduser(os.path.expandvars
303
 
                                         (config[u"secfile"])),
304
 
                      "rb") as secfile:
 
290
            with closing(open(os.path.expanduser
 
291
                              (os.path.expandvars
 
292
                               (config[u"secfile"])))) as secfile:
305
293
                self.secret = secfile.read()
306
294
        else:
307
 
            #XXX Need to allow secret on demand!
308
295
            raise TypeError(u"No secret or secfile for client %s"
309
296
                            % self.name)
310
297
        self.host = config.get(u"host", u"")
322
309
        self.checker_command = config[u"checker"]
323
310
        self.current_checker_command = None
324
311
        self.last_connect = None
325
 
        self._approved = None
326
 
        self.approved_by_default = config.get(u"approved_by_default",
327
 
                                              True)
328
 
        self.approvals_pending = 0
329
 
        self.approved_delay = string_to_delta(
330
 
            config[u"approved_delay"])
331
 
        self.approved_duration = string_to_delta(
332
 
            config[u"approved_duration"])
333
 
        self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
334
312
    
335
 
    def send_changedstate(self):
336
 
        self.changedstate.acquire()
337
 
        self.changedstate.notify_all()
338
 
        self.changedstate.release()
339
 
        
340
313
    def enable(self):
341
314
        """Start this client's checker and timeout hooks"""
342
315
        if getattr(self, u"enabled", False):
343
316
            # Already enabled
344
317
            return
345
 
        self.send_changedstate()
346
318
        self.last_enabled = datetime.datetime.utcnow()
347
319
        # Schedule a new checker to be started an 'interval' from now,
348
320
        # and every interval from then on.
349
321
        self.checker_initiator_tag = (gobject.timeout_add
350
322
                                      (self.interval_milliseconds(),
351
323
                                       self.start_checker))
 
324
        # Also start a new checker *right now*.
 
325
        self.start_checker()
352
326
        # Schedule a disable() when 'timeout' has passed
353
327
        self.disable_initiator_tag = (gobject.timeout_add
354
328
                                   (self.timeout_milliseconds(),
355
329
                                    self.disable))
356
330
        self.enabled = True
357
 
        # Also start a new checker *right now*.
358
 
        self.start_checker()
359
331
    
360
 
    def disable(self, quiet=True):
 
332
    def disable(self):
361
333
        """Disable this client."""
362
334
        if not getattr(self, "enabled", False):
363
335
            return False
364
 
        if not quiet:
365
 
            self.send_changedstate()
366
 
        if not quiet:
367
 
            logger.info(u"Disabling client %s", self.name)
 
336
        logger.info(u"Disabling client %s", self.name)
368
337
        if getattr(self, u"disable_initiator_tag", False):
369
338
            gobject.source_remove(self.disable_initiator_tag)
370
339
            self.disable_initiator_tag = None
422
391
        # client would inevitably timeout, since no checker would get
423
392
        # a chance to run to completion.  If we instead leave running
424
393
        # checkers alone, the checker would have to take more time
425
 
        # than 'timeout' for the client to be disabled, which is as it
426
 
        # should be.
 
394
        # than 'timeout' for the client to be declared invalid, which
 
395
        # is as it should be.
427
396
        
428
397
        # If a checker exists, make sure it is not a zombie
429
 
        try:
 
398
        if self.checker is not None:
430
399
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
431
 
        except (AttributeError, OSError), error:
432
 
            if (isinstance(error, OSError)
433
 
                and error.errno != errno.ECHILD):
434
 
                raise error
435
 
        else:
436
400
            if pid:
437
401
                logger.warning(u"Checker was a zombie")
438
402
                gobject.source_remove(self.checker_callback_tag)
494
458
        logger.debug(u"Stopping checker for %(name)s", vars(self))
495
459
        try:
496
460
            os.kill(self.checker.pid, signal.SIGTERM)
497
 
            #time.sleep(0.5)
 
461
            #os.sleep(0.5)
498
462
            #if self.checker.poll() is None:
499
463
            #    os.kill(self.checker.pid, signal.SIGKILL)
500
464
        except OSError, error:
501
465
            if error.errno != errno.ESRCH: # No such process
502
466
                raise
503
467
        self.checker = None
504
 
 
505
 
def dbus_service_property(dbus_interface, signature=u"v",
506
 
                          access=u"readwrite", byte_arrays=False):
507
 
    """Decorators for marking methods of a DBusObjectWithProperties to
508
 
    become properties on the D-Bus.
509
 
    
510
 
    The decorated method will be called with no arguments by "Get"
511
 
    and with one argument by "Set".
512
 
    
513
 
    The parameters, where they are supported, are the same as
514
 
    dbus.service.method, except there is only "signature", since the
515
 
    type from Get() and the type sent to Set() is the same.
516
 
    """
517
 
    # Encoding deeply encoded byte arrays is not supported yet by the
518
 
    # "Set" method, so we fail early here:
519
 
    if byte_arrays and signature != u"ay":
520
 
        raise ValueError(u"Byte arrays not supported for non-'ay'"
521
 
                         u" signature %r" % signature)
522
 
    def decorator(func):
523
 
        func._dbus_is_property = True
524
 
        func._dbus_interface = dbus_interface
525
 
        func._dbus_signature = signature
526
 
        func._dbus_access = access
527
 
        func._dbus_name = func.__name__
528
 
        if func._dbus_name.endswith(u"_dbus_property"):
529
 
            func._dbus_name = func._dbus_name[:-14]
530
 
        func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
531
 
        return func
532
 
    return decorator
533
 
 
534
 
 
535
 
class DBusPropertyException(dbus.exceptions.DBusException):
536
 
    """A base class for D-Bus property-related exceptions
537
 
    """
538
 
    def __unicode__(self):
539
 
        return unicode(str(self))
540
 
 
541
 
 
542
 
class DBusPropertyAccessException(DBusPropertyException):
543
 
    """A property's access permissions disallows an operation.
544
 
    """
545
 
    pass
546
 
 
547
 
 
548
 
class DBusPropertyNotFound(DBusPropertyException):
549
 
    """An attempt was made to access a non-existing property.
550
 
    """
551
 
    pass
552
 
 
553
 
 
554
 
class DBusObjectWithProperties(dbus.service.Object):
555
 
    """A D-Bus object with properties.
556
 
 
557
 
    Classes inheriting from this can use the dbus_service_property
558
 
    decorator to expose methods as D-Bus properties.  It exposes the
559
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
560
 
    """
561
 
    
562
 
    @staticmethod
563
 
    def _is_dbus_property(obj):
564
 
        return getattr(obj, u"_dbus_is_property", False)
565
 
    
566
 
    def _get_all_dbus_properties(self):
567
 
        """Returns a generator of (name, attribute) pairs
568
 
        """
569
 
        return ((prop._dbus_name, prop)
570
 
                for name, prop in
571
 
                inspect.getmembers(self, self._is_dbus_property))
572
 
    
573
 
    def _get_dbus_property(self, interface_name, property_name):
574
 
        """Returns a bound method if one exists which is a D-Bus
575
 
        property with the specified name and interface.
576
 
        """
577
 
        for name in (property_name,
578
 
                     property_name + u"_dbus_property"):
579
 
            prop = getattr(self, name, None)
580
 
            if (prop is None
581
 
                or not self._is_dbus_property(prop)
582
 
                or prop._dbus_name != property_name
583
 
                or (interface_name and prop._dbus_interface
584
 
                    and interface_name != prop._dbus_interface)):
585
 
                continue
586
 
            return prop
587
 
        # No such property
588
 
        raise DBusPropertyNotFound(self.dbus_object_path + u":"
589
 
                                   + interface_name + u"."
590
 
                                   + property_name)
591
 
    
592
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
593
 
                         out_signature=u"v")
594
 
    def Get(self, interface_name, property_name):
595
 
        """Standard D-Bus property Get() method, see D-Bus standard.
596
 
        """
597
 
        prop = self._get_dbus_property(interface_name, property_name)
598
 
        if prop._dbus_access == u"write":
599
 
            raise DBusPropertyAccessException(property_name)
600
 
        value = prop()
601
 
        if not hasattr(value, u"variant_level"):
602
 
            return value
603
 
        return type(value)(value, variant_level=value.variant_level+1)
604
 
    
605
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
606
 
    def Set(self, interface_name, property_name, value):
607
 
        """Standard D-Bus property Set() method, see D-Bus standard.
608
 
        """
609
 
        prop = self._get_dbus_property(interface_name, property_name)
610
 
        if prop._dbus_access == u"read":
611
 
            raise DBusPropertyAccessException(property_name)
612
 
        if prop._dbus_get_args_options[u"byte_arrays"]:
613
 
            # The byte_arrays option is not supported yet on
614
 
            # signatures other than "ay".
615
 
            if prop._dbus_signature != u"ay":
616
 
                raise ValueError
617
 
            value = dbus.ByteArray(''.join(unichr(byte)
618
 
                                           for byte in value))
619
 
        prop(value)
620
 
    
621
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
622
 
                         out_signature=u"a{sv}")
623
 
    def GetAll(self, interface_name):
624
 
        """Standard D-Bus property GetAll() method, see D-Bus
625
 
        standard.
626
 
 
627
 
        Note: Will not include properties with access="write".
628
 
        """
629
 
        all = {}
630
 
        for name, prop in self._get_all_dbus_properties():
631
 
            if (interface_name
632
 
                and interface_name != prop._dbus_interface):
633
 
                # Interface non-empty but did not match
634
 
                continue
635
 
            # Ignore write-only properties
636
 
            if prop._dbus_access == u"write":
637
 
                continue
638
 
            value = prop()
639
 
            if not hasattr(value, u"variant_level"):
640
 
                all[name] = value
641
 
                continue
642
 
            all[name] = type(value)(value, variant_level=
643
 
                                    value.variant_level+1)
644
 
        return dbus.Dictionary(all, signature=u"sv")
645
 
    
646
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
647
 
                         out_signature=u"s",
648
 
                         path_keyword='object_path',
649
 
                         connection_keyword='connection')
650
 
    def Introspect(self, object_path, connection):
651
 
        """Standard D-Bus method, overloaded to insert property tags.
652
 
        """
653
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
654
 
                                                   connection)
655
 
        try:
656
 
            document = xml.dom.minidom.parseString(xmlstring)
657
 
            def make_tag(document, name, prop):
658
 
                e = document.createElement(u"property")
659
 
                e.setAttribute(u"name", name)
660
 
                e.setAttribute(u"type", prop._dbus_signature)
661
 
                e.setAttribute(u"access", prop._dbus_access)
662
 
                return e
663
 
            for if_tag in document.getElementsByTagName(u"interface"):
664
 
                for tag in (make_tag(document, name, prop)
665
 
                            for name, prop
666
 
                            in self._get_all_dbus_properties()
667
 
                            if prop._dbus_interface
668
 
                            == if_tag.getAttribute(u"name")):
669
 
                    if_tag.appendChild(tag)
670
 
                # Add the names to the return values for the
671
 
                # "org.freedesktop.DBus.Properties" methods
672
 
                if (if_tag.getAttribute(u"name")
673
 
                    == u"org.freedesktop.DBus.Properties"):
674
 
                    for cn in if_tag.getElementsByTagName(u"method"):
675
 
                        if cn.getAttribute(u"name") == u"Get":
676
 
                            for arg in cn.getElementsByTagName(u"arg"):
677
 
                                if (arg.getAttribute(u"direction")
678
 
                                    == u"out"):
679
 
                                    arg.setAttribute(u"name", u"value")
680
 
                        elif cn.getAttribute(u"name") == u"GetAll":
681
 
                            for arg in cn.getElementsByTagName(u"arg"):
682
 
                                if (arg.getAttribute(u"direction")
683
 
                                    == u"out"):
684
 
                                    arg.setAttribute(u"name", u"props")
685
 
            xmlstring = document.toxml(u"utf-8")
686
 
            document.unlink()
687
 
        except (AttributeError, xml.dom.DOMException,
688
 
                xml.parsers.expat.ExpatError), error:
689
 
            logger.error(u"Failed to override Introspection method",
690
 
                         error)
691
 
        return xmlstring
692
 
 
693
 
 
694
 
class ClientDBus(Client, DBusObjectWithProperties):
 
468
    
 
469
    def still_valid(self):
 
470
        """Has the timeout not yet passed for this client?"""
 
471
        if not getattr(self, u"enabled", False):
 
472
            return False
 
473
        now = datetime.datetime.utcnow()
 
474
        if self.last_checked_ok is None:
 
475
            return now < (self.created + self.timeout)
 
476
        else:
 
477
            return now < (self.last_checked_ok + self.timeout)
 
478
 
 
479
 
 
480
class ClientDBus(Client, dbus.service.Object):
695
481
    """A Client class using D-Bus
696
482
    
697
483
    Attributes:
701
487
    # dbus.service.Object doesn't use super(), so we can't either.
702
488
    
703
489
    def __init__(self, bus = None, *args, **kwargs):
704
 
        self._approvals_pending = 0
705
490
        self.bus = bus
706
491
        Client.__init__(self, *args, **kwargs)
707
492
        # Only now, when this client is initialized, can it show up on
709
494
        self.dbus_object_path = (dbus.ObjectPath
710
495
                                 (u"/clients/"
711
496
                                  + self.name.replace(u".", u"_")))
712
 
        DBusObjectWithProperties.__init__(self, self.bus,
713
 
                                          self.dbus_object_path)
714
 
 
715
 
    #Could possible return a bool(self._approvals_pending),
716
 
    #but this could mess up approvals_pending += 1 XXX 
717
 
    def _get_approvals_pending(self):
718
 
        return self._approvals_pending
719
 
    def _set_approvals_pending(self, value):
720
 
        old_value = self._approvals_pending
721
 
        self._approvals_pending = value
722
 
        bval = bool(value)
723
 
        if (hasattr(self, "dbus_object_path")
724
 
            and bval is not bool(old_value)):
725
 
            dbus_bool = dbus.Boolean(bval, variant_level=1)
726
 
            self.PropertyChanged(dbus.String(u"approved_pending"),
727
 
                                 dbus_bool)
728
 
 
729
 
    approvals_pending = property(_get_approvals_pending,
730
 
                                 _set_approvals_pending)
731
 
    del _get_approvals_pending, _set_approvals_pending
 
497
        dbus.service.Object.__init__(self, self.bus,
 
498
                                     self.dbus_object_path)
732
499
    
733
500
    @staticmethod
734
501
    def _datetime_to_dbus(dt, variant_level=0):
749
516
                                       variant_level=1))
750
517
        return r
751
518
    
752
 
    def disable(self, quiet = False):
 
519
    def disable(self, signal = True):
753
520
        oldstate = getattr(self, u"enabled", False)
754
 
        r = Client.disable(self, quiet=quiet)
755
 
        if not quiet and oldstate != self.enabled:
 
521
        r = Client.disable(self)
 
522
        if signal and oldstate != self.enabled:
756
523
            # Emit D-Bus signal
757
524
            self.PropertyChanged(dbus.String(u"enabled"),
758
525
                                 dbus.Boolean(False, variant_level=1))
763
530
            self.remove_from_connection()
764
531
        except LookupError:
765
532
            pass
766
 
        if hasattr(DBusObjectWithProperties, u"__del__"):
767
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
 
533
        if hasattr(dbus.service.Object, u"__del__"):
 
534
            dbus.service.Object.__del__(self, *args, **kwargs)
768
535
        Client.__del__(self, *args, **kwargs)
769
536
    
770
537
    def checker_callback(self, pid, condition, command,
823
590
            self.PropertyChanged(dbus.String(u"checker_running"),
824
591
                                 dbus.Boolean(False, variant_level=1))
825
592
        return r
826
 
 
827
 
    def _reset_approved(self):
828
 
        self._approved = None
829
 
        return False
830
 
    
831
 
    def approve(self, value=True):
832
 
        self.send_changedstate()
833
 
        self._approved = value
834
 
        gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration),
835
 
                            self._reset_approved)
836
 
    
837
 
    
838
 
    ## D-Bus methods, signals & properties
 
593
    
 
594
    ## D-Bus methods & signals
839
595
    _interface = u"se.bsnet.fukt.Mandos.Client"
840
596
    
841
 
    ## Signals
 
597
    # CheckedOK - method
 
598
    @dbus.service.method(_interface)
 
599
    def CheckedOK(self):
 
600
        return self.checked_ok()
842
601
    
843
602
    # CheckerCompleted - signal
844
603
    @dbus.service.signal(_interface, signature=u"nxs")
852
611
        "D-Bus signal"
853
612
        pass
854
613
    
 
614
    # GetAllProperties - method
 
615
    @dbus.service.method(_interface, out_signature=u"a{sv}")
 
616
    def GetAllProperties(self):
 
617
        "D-Bus method"
 
618
        return dbus.Dictionary({
 
619
                dbus.String(u"name"):
 
620
                    dbus.String(self.name, variant_level=1),
 
621
                dbus.String(u"fingerprint"):
 
622
                    dbus.String(self.fingerprint, variant_level=1),
 
623
                dbus.String(u"host"):
 
624
                    dbus.String(self.host, variant_level=1),
 
625
                dbus.String(u"created"):
 
626
                    self._datetime_to_dbus(self.created,
 
627
                                           variant_level=1),
 
628
                dbus.String(u"last_enabled"):
 
629
                    (self._datetime_to_dbus(self.last_enabled,
 
630
                                            variant_level=1)
 
631
                     if self.last_enabled is not None
 
632
                     else dbus.Boolean(False, variant_level=1)),
 
633
                dbus.String(u"enabled"):
 
634
                    dbus.Boolean(self.enabled, variant_level=1),
 
635
                dbus.String(u"last_checked_ok"):
 
636
                    (self._datetime_to_dbus(self.last_checked_ok,
 
637
                                            variant_level=1)
 
638
                     if self.last_checked_ok is not None
 
639
                     else dbus.Boolean (False, variant_level=1)),
 
640
                dbus.String(u"timeout"):
 
641
                    dbus.UInt64(self.timeout_milliseconds(),
 
642
                                variant_level=1),
 
643
                dbus.String(u"interval"):
 
644
                    dbus.UInt64(self.interval_milliseconds(),
 
645
                                variant_level=1),
 
646
                dbus.String(u"checker"):
 
647
                    dbus.String(self.checker_command,
 
648
                                variant_level=1),
 
649
                dbus.String(u"checker_running"):
 
650
                    dbus.Boolean(self.checker is not None,
 
651
                                 variant_level=1),
 
652
                dbus.String(u"object_path"):
 
653
                    dbus.ObjectPath(self.dbus_object_path,
 
654
                                    variant_level=1)
 
655
                }, signature=u"sv")
 
656
    
 
657
    # IsStillValid - method
 
658
    @dbus.service.method(_interface, out_signature=u"b")
 
659
    def IsStillValid(self):
 
660
        return self.still_valid()
 
661
    
855
662
    # PropertyChanged - signal
856
663
    @dbus.service.signal(_interface, signature=u"sv")
857
664
    def PropertyChanged(self, property, value):
858
665
        "D-Bus signal"
859
666
        pass
860
667
    
861
 
    # GotSecret - signal
862
 
    # XXXTEDDY Is sent after succesfull transfer of secret from mandos-server to mandos-client
 
668
    # ReceivedSecret - signal
863
669
    @dbus.service.signal(_interface)
864
 
    def GotSecret(self):
 
670
    def ReceivedSecret(self):
865
671
        "D-Bus signal"
866
672
        pass
867
673
    
868
674
    # Rejected - signal
869
 
    @dbus.service.signal(_interface, signature=u"s")
870
 
    def Rejected(self, reason):
871
 
        "D-Bus signal"
872
 
        pass
873
 
    
874
 
    # NeedApproval - signal
875
 
    @dbus.service.signal(_interface, signature=u"db")
876
 
    def NeedApproval(self, timeout, default):
877
 
        "D-Bus signal"
878
 
        pass
879
 
    
880
 
    ## Methods
881
 
 
882
 
    # Approve - method
883
 
    @dbus.service.method(_interface, in_signature=u"b")
884
 
    def Approve(self, value):
885
 
        self.approve(value)
886
 
 
887
 
    # CheckedOK - method
888
 
    @dbus.service.method(_interface)
889
 
    def CheckedOK(self):
890
 
        return self.checked_ok()
 
675
    @dbus.service.signal(_interface)
 
676
    def Rejected(self):
 
677
        "D-Bus signal"
 
678
        pass
 
679
    
 
680
    # SetChecker - method
 
681
    @dbus.service.method(_interface, in_signature=u"s")
 
682
    def SetChecker(self, checker):
 
683
        "D-Bus setter method"
 
684
        self.checker_command = checker
 
685
        # Emit D-Bus signal
 
686
        self.PropertyChanged(dbus.String(u"checker"),
 
687
                             dbus.String(self.checker_command,
 
688
                                         variant_level=1))
 
689
    
 
690
    # SetHost - method
 
691
    @dbus.service.method(_interface, in_signature=u"s")
 
692
    def SetHost(self, host):
 
693
        "D-Bus setter method"
 
694
        self.host = host
 
695
        # Emit D-Bus signal
 
696
        self.PropertyChanged(dbus.String(u"host"),
 
697
                             dbus.String(self.host, variant_level=1))
 
698
    
 
699
    # SetInterval - method
 
700
    @dbus.service.method(_interface, in_signature=u"t")
 
701
    def SetInterval(self, milliseconds):
 
702
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
 
703
        # Emit D-Bus signal
 
704
        self.PropertyChanged(dbus.String(u"interval"),
 
705
                             (dbus.UInt64(self.interval_milliseconds(),
 
706
                                          variant_level=1)))
 
707
    
 
708
    # SetSecret - method
 
709
    @dbus.service.method(_interface, in_signature=u"ay",
 
710
                         byte_arrays=True)
 
711
    def SetSecret(self, secret):
 
712
        "D-Bus setter method"
 
713
        self.secret = str(secret)
 
714
    
 
715
    # SetTimeout - method
 
716
    @dbus.service.method(_interface, in_signature=u"t")
 
717
    def SetTimeout(self, milliseconds):
 
718
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
 
719
        # Emit D-Bus signal
 
720
        self.PropertyChanged(dbus.String(u"timeout"),
 
721
                             (dbus.UInt64(self.timeout_milliseconds(),
 
722
                                          variant_level=1)))
891
723
    
892
724
    # Enable - method
893
725
    @dbus.service.method(_interface)
912
744
    def StopChecker(self):
913
745
        self.stop_checker()
914
746
    
915
 
    ## Properties
916
 
    
917
 
    # approved_pending - property
918
 
    @dbus_service_property(_interface, signature=u"b", access=u"read")
919
 
    def approved_pending_dbus_property(self):
920
 
        return dbus.Boolean(bool(self.approvals_pending))
921
 
    
922
 
    # approved_by_default - property
923
 
    @dbus_service_property(_interface, signature=u"b",
924
 
                           access=u"readwrite")
925
 
    def approved_by_default_dbus_property(self):
926
 
        return dbus.Boolean(self.approved_by_default)
927
 
    
928
 
    # approved_delay - property
929
 
    @dbus_service_property(_interface, signature=u"t",
930
 
                           access=u"readwrite")
931
 
    def approved_delay_dbus_property(self):
932
 
        return dbus.UInt64(self.approved_delay_milliseconds())
933
 
    
934
 
    # approved_duration - property
935
 
    @dbus_service_property(_interface, signature=u"t",
936
 
                           access=u"readwrite")
937
 
    def approved_duration_dbus_property(self):
938
 
        return dbus.UInt64(self._timedelta_to_milliseconds(
939
 
                self.approved_duration))
940
 
    
941
 
    # name - property
942
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
943
 
    def name_dbus_property(self):
944
 
        return dbus.String(self.name)
945
 
    
946
 
    # fingerprint - property
947
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
948
 
    def fingerprint_dbus_property(self):
949
 
        return dbus.String(self.fingerprint)
950
 
    
951
 
    # host - property
952
 
    @dbus_service_property(_interface, signature=u"s",
953
 
                           access=u"readwrite")
954
 
    def host_dbus_property(self, value=None):
955
 
        if value is None:       # get
956
 
            return dbus.String(self.host)
957
 
        self.host = value
958
 
        # Emit D-Bus signal
959
 
        self.PropertyChanged(dbus.String(u"host"),
960
 
                             dbus.String(value, variant_level=1))
961
 
    
962
 
    # created - property
963
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
964
 
    def created_dbus_property(self):
965
 
        return dbus.String(self._datetime_to_dbus(self.created))
966
 
    
967
 
    # last_enabled - property
968
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
969
 
    def last_enabled_dbus_property(self):
970
 
        if self.last_enabled is None:
971
 
            return dbus.String(u"")
972
 
        return dbus.String(self._datetime_to_dbus(self.last_enabled))
973
 
    
974
 
    # enabled - property
975
 
    @dbus_service_property(_interface, signature=u"b",
976
 
                           access=u"readwrite")
977
 
    def enabled_dbus_property(self, value=None):
978
 
        if value is None:       # get
979
 
            return dbus.Boolean(self.enabled)
980
 
        if value:
981
 
            self.enable()
982
 
        else:
983
 
            self.disable()
984
 
    
985
 
    # last_checked_ok - property
986
 
    @dbus_service_property(_interface, signature=u"s",
987
 
                           access=u"readwrite")
988
 
    def last_checked_ok_dbus_property(self, value=None):
989
 
        if value is not None:
990
 
            self.checked_ok()
991
 
            return
992
 
        if self.last_checked_ok is None:
993
 
            return dbus.String(u"")
994
 
        return dbus.String(self._datetime_to_dbus(self
995
 
                                                  .last_checked_ok))
996
 
    
997
 
    # timeout - property
998
 
    @dbus_service_property(_interface, signature=u"t",
999
 
                           access=u"readwrite")
1000
 
    def timeout_dbus_property(self, value=None):
1001
 
        if value is None:       # get
1002
 
            return dbus.UInt64(self.timeout_milliseconds())
1003
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1004
 
        # Emit D-Bus signal
1005
 
        self.PropertyChanged(dbus.String(u"timeout"),
1006
 
                             dbus.UInt64(value, variant_level=1))
1007
 
        if getattr(self, u"disable_initiator_tag", None) is None:
1008
 
            return
1009
 
        # Reschedule timeout
1010
 
        gobject.source_remove(self.disable_initiator_tag)
1011
 
        self.disable_initiator_tag = None
1012
 
        time_to_die = (self.
1013
 
                       _timedelta_to_milliseconds((self
1014
 
                                                   .last_checked_ok
1015
 
                                                   + self.timeout)
1016
 
                                                  - datetime.datetime
1017
 
                                                  .utcnow()))
1018
 
        if time_to_die <= 0:
1019
 
            # The timeout has passed
1020
 
            self.disable()
1021
 
        else:
1022
 
            self.disable_initiator_tag = (gobject.timeout_add
1023
 
                                          (time_to_die, self.disable))
1024
 
    
1025
 
    # interval - property
1026
 
    @dbus_service_property(_interface, signature=u"t",
1027
 
                           access=u"readwrite")
1028
 
    def interval_dbus_property(self, value=None):
1029
 
        if value is None:       # get
1030
 
            return dbus.UInt64(self.interval_milliseconds())
1031
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1032
 
        # Emit D-Bus signal
1033
 
        self.PropertyChanged(dbus.String(u"interval"),
1034
 
                             dbus.UInt64(value, variant_level=1))
1035
 
        if getattr(self, u"checker_initiator_tag", None) is None:
1036
 
            return
1037
 
        # Reschedule checker run
1038
 
        gobject.source_remove(self.checker_initiator_tag)
1039
 
        self.checker_initiator_tag = (gobject.timeout_add
1040
 
                                      (value, self.start_checker))
1041
 
        self.start_checker()    # Start one now, too
1042
 
 
1043
 
    # checker - property
1044
 
    @dbus_service_property(_interface, signature=u"s",
1045
 
                           access=u"readwrite")
1046
 
    def checker_dbus_property(self, value=None):
1047
 
        if value is None:       # get
1048
 
            return dbus.String(self.checker_command)
1049
 
        self.checker_command = value
1050
 
        # Emit D-Bus signal
1051
 
        self.PropertyChanged(dbus.String(u"checker"),
1052
 
                             dbus.String(self.checker_command,
1053
 
                                         variant_level=1))
1054
 
    
1055
 
    # checker_running - property
1056
 
    @dbus_service_property(_interface, signature=u"b",
1057
 
                           access=u"readwrite")
1058
 
    def checker_running_dbus_property(self, value=None):
1059
 
        if value is None:       # get
1060
 
            return dbus.Boolean(self.checker is not None)
1061
 
        if value:
1062
 
            self.start_checker()
1063
 
        else:
1064
 
            self.stop_checker()
1065
 
    
1066
 
    # object_path - property
1067
 
    @dbus_service_property(_interface, signature=u"o", access=u"read")
1068
 
    def object_path_dbus_property(self):
1069
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1070
 
    
1071
 
    # secret = property
1072
 
    @dbus_service_property(_interface, signature=u"ay",
1073
 
                           access=u"write", byte_arrays=True)
1074
 
    def secret_dbus_property(self, value):
1075
 
        self.secret = str(value)
1076
 
    
1077
747
    del _interface
1078
748
 
1079
749
 
1080
 
class ProxyClient(object):
1081
 
    def __init__(self, child_pipe, fpr, address):
1082
 
        self._pipe = child_pipe
1083
 
        self._pipe.send(('init', fpr, address))
1084
 
        if not self._pipe.recv():
1085
 
            raise KeyError()
1086
 
 
1087
 
    def __getattribute__(self, name):
1088
 
        if(name == '_pipe'):
1089
 
            return super(ProxyClient, self).__getattribute__(name)
1090
 
        self._pipe.send(('getattr', name))
1091
 
        data = self._pipe.recv()
1092
 
        if data[0] == 'data':
1093
 
            return data[1]
1094
 
        if data[0] == 'function':
1095
 
            def func(*args, **kwargs):
1096
 
                self._pipe.send(('funcall', name, args, kwargs))
1097
 
                return self._pipe.recv()[1]
1098
 
            return func
1099
 
 
1100
 
    def __setattr__(self, name, value):
1101
 
        if(name == '_pipe'):
1102
 
            return super(ProxyClient, self).__setattr__(name, value)
1103
 
        self._pipe.send(('setattr', name, value))
1104
 
 
1105
 
 
1106
750
class ClientHandler(socketserver.BaseRequestHandler, object):
1107
751
    """A class to handle client connections.
1108
752
    
1110
754
    Note: This will run in its own forked process."""
1111
755
    
1112
756
    def handle(self):
1113
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1114
 
            logger.info(u"TCP connection from: %s",
1115
 
                        unicode(self.client_address))
1116
 
            logger.debug(u"Pipe FD: %d",
1117
 
                         self.server.child_pipe.fileno())
1118
 
 
 
757
        logger.info(u"TCP connection from: %s",
 
758
                    unicode(self.client_address))
 
759
        logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
 
760
        # Open IPC pipe to parent process
 
761
        with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1119
762
            session = (gnutls.connection
1120
763
                       .ClientSession(self.request,
1121
764
                                      gnutls.connection
1122
765
                                      .X509Credentials()))
1123
 
 
 
766
            
 
767
            line = self.request.makefile().readline()
 
768
            logger.debug(u"Protocol version: %r", line)
 
769
            try:
 
770
                if int(line.strip().split()[0]) > 1:
 
771
                    raise RuntimeError
 
772
            except (ValueError, IndexError, RuntimeError), error:
 
773
                logger.error(u"Unknown protocol version: %s", error)
 
774
                return
 
775
            
1124
776
            # Note: gnutls.connection.X509Credentials is really a
1125
777
            # generic GnuTLS certificate credentials object so long as
1126
778
            # no X.509 keys are added to it.  Therefore, we can use it
1127
779
            # here despite using OpenPGP certificates.
1128
 
 
 
780
            
1129
781
            #priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1130
782
            #                      u"+AES-256-CBC", u"+SHA1",
1131
783
            #                      u"+COMP-NULL", u"+CTYPE-OPENPGP",
1137
789
            (gnutls.library.functions
1138
790
             .gnutls_priority_set_direct(session._c_object,
1139
791
                                         priority, None))
1140
 
 
1141
 
            # Start communication using the Mandos protocol
1142
 
            # Get protocol number
1143
 
            line = self.request.makefile().readline()
1144
 
            logger.debug(u"Protocol version: %r", line)
1145
 
            try:
1146
 
                if int(line.strip().split()[0]) > 1:
1147
 
                    raise RuntimeError
1148
 
            except (ValueError, IndexError, RuntimeError), error:
1149
 
                logger.error(u"Unknown protocol version: %s", error)
1150
 
                return
1151
 
 
1152
 
            # Start GnuTLS connection
 
792
            
1153
793
            try:
1154
794
                session.handshake()
1155
795
            except gnutls.errors.GNUTLSError, error:
1158
798
                # established.  Just abandon the request.
1159
799
                return
1160
800
            logger.debug(u"Handshake succeeded")
1161
 
 
1162
 
            approval_required = False
1163
801
            try:
1164
 
                try:
1165
 
                    fpr = self.fingerprint(self.peer_certificate
1166
 
                                           (session))
1167
 
                except (TypeError, gnutls.errors.GNUTLSError), error:
1168
 
                    logger.warning(u"Bad certificate: %s", error)
1169
 
                    return
1170
 
                logger.debug(u"Fingerprint: %s", fpr)
1171
 
 
1172
 
                try:
1173
 
                    client = ProxyClient(child_pipe, fpr,
1174
 
                                         self.client_address)
1175
 
                except KeyError:
1176
 
                    return
1177
 
                
1178
 
                if client.approved_delay:
1179
 
                    delay = client.approved_delay
1180
 
                    client.approvals_pending += 1
1181
 
                    approval_required = True
1182
 
                
1183
 
                while True:
1184
 
                    if not client.enabled:
1185
 
                        logger.warning(u"Client %s is disabled",
1186
 
                                       client.name)
1187
 
                        if self.server.use_dbus:
1188
 
                            # Emit D-Bus signal
1189
 
                            client.Rejected("Disabled")                    
1190
 
                        return
1191
 
                    
1192
 
                    if client._approved or not client.approved_delay:
1193
 
                        #We are approved or approval is disabled
1194
 
                        break
1195
 
                    elif client._approved is None:
1196
 
                        logger.info(u"Client %s need approval",
1197
 
                                    client.name)
1198
 
                        if self.server.use_dbus:
1199
 
                            # Emit D-Bus signal
1200
 
                            client.NeedApproval(
1201
 
                                client.approved_delay_milliseconds(),
1202
 
                                client.approved_by_default)
1203
 
                    else:
1204
 
                        logger.warning(u"Client %s was not approved",
1205
 
                                       client.name)
1206
 
                        if self.server.use_dbus:
1207
 
                            # Emit D-Bus signal
1208
 
                            client.Rejected("Disapproved")
1209
 
                        return
1210
 
                    
1211
 
                    #wait until timeout or approved
1212
 
                    #x = float(client._timedelta_to_milliseconds(delay))
1213
 
                    time = datetime.datetime.now()
1214
 
                    client.changedstate.acquire()
1215
 
                    client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1216
 
                    client.changedstate.release()
1217
 
                    time2 = datetime.datetime.now()
1218
 
                    if (time2 - time) >= delay:
1219
 
                        if not client.approved_by_default:
1220
 
                            logger.warning("Client %s timed out while"
1221
 
                                           " waiting for approval",
1222
 
                                           client.name)
1223
 
                            if self.server.use_dbus:
1224
 
                                # Emit D-Bus signal
1225
 
                                client.Rejected("Time out")
1226
 
                            return
1227
 
                        else:
1228
 
                            break
1229
 
                    else:
1230
 
                        delay -= time2 - time
1231
 
                
1232
 
                sent_size = 0
1233
 
                while sent_size < len(client.secret):
1234
 
                    # XXX handle session exception
1235
 
                    sent = session.send(client.secret[sent_size:])
1236
 
                    logger.debug(u"Sent: %d, remaining: %d",
1237
 
                                 sent, len(client.secret)
1238
 
                                 - (sent_size + sent))
1239
 
                    sent_size += sent
1240
 
 
1241
 
                logger.info(u"Sending secret to %s", client.name)
1242
 
                # bump the timeout as if seen
1243
 
                client.checked_ok()
1244
 
                if self.server.use_dbus:
1245
 
                    # Emit D-Bus signal
1246
 
                    client.GotSecret()
 
802
                fpr = self.fingerprint(self.peer_certificate(session))
 
803
            except (TypeError, gnutls.errors.GNUTLSError), error:
 
804
                logger.warning(u"Bad certificate: %s", error)
 
805
                session.bye()
 
806
                return
 
807
            logger.debug(u"Fingerprint: %s", fpr)
1247
808
            
1248
 
            finally:
1249
 
                if approval_required:
1250
 
                    client.approvals_pending -= 1
1251
 
                session.bye()
 
809
            for c in self.server.clients:
 
810
                if c.fingerprint == fpr:
 
811
                    client = c
 
812
                    break
 
813
            else:
 
814
                ipc.write(u"NOTFOUND %s %s\n"
 
815
                          % (fpr, unicode(self.client_address)))
 
816
                session.bye()
 
817
                return
 
818
            # Have to check if client.still_valid(), since it is
 
819
            # possible that the client timed out while establishing
 
820
            # the GnuTLS session.
 
821
            if not client.still_valid():
 
822
                ipc.write(u"INVALID %s\n" % client.name)
 
823
                session.bye()
 
824
                return
 
825
            ipc.write(u"SENDING %s\n" % client.name)
 
826
            sent_size = 0
 
827
            while sent_size < len(client.secret):
 
828
                sent = session.send(client.secret[sent_size:])
 
829
                logger.debug(u"Sent: %d, remaining: %d",
 
830
                             sent, len(client.secret)
 
831
                             - (sent_size + sent))
 
832
                sent_size += sent
 
833
            session.bye()
1252
834
    
1253
835
    @staticmethod
1254
836
    def peer_certificate(session):
1314
896
        return hex_fpr
1315
897
 
1316
898
 
1317
 
class MultiprocessingMixIn(object):
1318
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1319
 
    def sub_process_main(self, request, address):
1320
 
        try:
1321
 
            self.finish_request(request, address)
1322
 
        except:
1323
 
            self.handle_error(request, address)
1324
 
        self.close_request(request)
1325
 
            
1326
 
    def process_request(self, request, address):
1327
 
        """Start a new process to process the request."""
1328
 
        multiprocessing.Process(target = self.sub_process_main,
1329
 
                                args = (request, address)).start()
1330
 
 
1331
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1332
 
    """ adds a pipe to the MixIn """
 
899
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
 
900
    """Like socketserver.ForkingMixIn, but also pass a pipe."""
1333
901
    def process_request(self, request, client_address):
1334
902
        """Overrides and wraps the original process_request().
1335
903
        
1336
904
        This function creates a new pipe in self.pipe
1337
905
        """
1338
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1339
 
 
1340
 
        super(MultiprocessingMixInWithPipe,
 
906
        self.pipe = os.pipe()
 
907
        super(ForkingMixInWithPipe,
1341
908
              self).process_request(request, client_address)
1342
 
        self.child_pipe.close()
1343
 
        self.add_pipe(parent_pipe)
1344
 
 
1345
 
    def add_pipe(self, parent_pipe):
 
909
        os.close(self.pipe[1])  # close write end
 
910
        self.add_pipe(self.pipe[0])
 
911
    def add_pipe(self, pipe):
1346
912
        """Dummy function; override as necessary"""
1347
 
        pass
1348
 
 
1349
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
 
913
        os.close(pipe)
 
914
 
 
915
 
 
916
class IPv6_TCPServer(ForkingMixInWithPipe,
1350
917
                     socketserver.TCPServer, object):
1351
918
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1352
919
    
1416
983
        clients:        set of Client objects
1417
984
        gnutls_priority GnuTLS priority string
1418
985
        use_dbus:       Boolean; to emit D-Bus signals or not
 
986
        clients:        set of Client objects
 
987
        gnutls_priority GnuTLS priority string
 
988
        use_dbus:       Boolean; to emit D-Bus signals or not
1419
989
    
1420
990
    Assumes a gobject.MainLoop event loop.
1421
991
    """
1437
1007
            return socketserver.TCPServer.server_activate(self)
1438
1008
    def enable(self):
1439
1009
        self.enabled = True
1440
 
    def add_pipe(self, parent_pipe):
 
1010
    def add_pipe(self, pipe):
1441
1011
        # Call "handle_ipc" for both data and EOF events
1442
 
        gobject.io_add_watch(parent_pipe.fileno(),
1443
 
                             gobject.IO_IN | gobject.IO_HUP,
1444
 
                             functools.partial(self.handle_ipc,
1445
 
                                               parent_pipe = parent_pipe))
1446
 
        
1447
 
    def handle_ipc(self, source, condition, parent_pipe=None,
1448
 
                   client_object=None):
 
1012
        gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
 
1013
                             self.handle_ipc)
 
1014
    def handle_ipc(self, source, condition, file_objects={}):
1449
1015
        condition_names = {
1450
1016
            gobject.IO_IN: u"IN",   # There is data to read.
1451
1017
            gobject.IO_OUT: u"OUT", # Data can be written (without
1462
1028
                                       if cond & condition)
1463
1029
        logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1464
1030
                     conditions_string)
1465
 
 
1466
 
        # XXXTEDDY error or the other end of multiprocessing.Pipe has closed
1467
 
        if condition & gobject.IO_HUP or condition & gobject.IO_ERR:
1468
 
            return False
1469
 
        
1470
 
        # Read a request from the child
1471
 
        request = parent_pipe.recv()
1472
 
        logger.debug(u"IPC request: %s", repr(request))
1473
 
        command = request[0]
1474
 
        
1475
 
        if command == 'init':
1476
 
            fpr = request[1]
1477
 
            address = request[2]
1478
 
            
1479
 
            for c in self.clients:
1480
 
                if c.fingerprint == fpr:
1481
 
                    client = c
1482
 
                    break
1483
 
            else:
1484
 
                logger.warning(u"Client not found for fingerprint: %s, ad"
1485
 
                               u"dress: %s", fpr, address)
1486
 
                if self.use_dbus:
1487
 
                    # Emit D-Bus signal
1488
 
                    mandos_dbus_service.ClientNotFound(fpr, address)
1489
 
                parent_pipe.send(False)
1490
 
                return False
1491
 
            
1492
 
            gobject.io_add_watch(parent_pipe.fileno(),
1493
 
                                 gobject.IO_IN | gobject.IO_HUP,
1494
 
                                 functools.partial(self.handle_ipc,
1495
 
                                                   parent_pipe = parent_pipe,
1496
 
                                                   client_object = client))
1497
 
            parent_pipe.send(True)
1498
 
            # remove the old hook in favor of the new above hook on same fileno
1499
 
            return False
1500
 
        if command == 'funcall':
1501
 
            funcname = request[1]
1502
 
            args = request[2]
1503
 
            kwargs = request[3]
1504
 
            
1505
 
            parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1506
 
 
1507
 
        if command == 'getattr':
1508
 
            attrname = request[1]
1509
 
            if callable(client_object.__getattribute__(attrname)):
1510
 
                parent_pipe.send(('function',))
1511
 
            else:
1512
 
                parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1513
 
        
1514
 
        if command == 'setattr':
1515
 
            attrname = request[1]
1516
 
            value = request[2]
1517
 
            setattr(client_object, attrname, value)
1518
 
 
 
1031
        
 
1032
        # Turn the pipe file descriptor into a Python file object
 
1033
        if source not in file_objects:
 
1034
            file_objects[source] = os.fdopen(source, u"r", 1)
 
1035
        
 
1036
        # Read a line from the file object
 
1037
        cmdline = file_objects[source].readline()
 
1038
        if not cmdline:             # Empty line means end of file
 
1039
            # close the IPC pipe
 
1040
            file_objects[source].close()
 
1041
            del file_objects[source]
 
1042
            
 
1043
            # Stop calling this function
 
1044
            return False
 
1045
        
 
1046
        logger.debug(u"IPC command: %r", cmdline)
 
1047
        
 
1048
        # Parse and act on command
 
1049
        cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
 
1050
        
 
1051
        if cmd == u"NOTFOUND":
 
1052
            logger.warning(u"Client not found for fingerprint: %s",
 
1053
                           args)
 
1054
            if self.use_dbus:
 
1055
                # Emit D-Bus signal
 
1056
                mandos_dbus_service.ClientNotFound(args)
 
1057
        elif cmd == u"INVALID":
 
1058
            for client in self.clients:
 
1059
                if client.name == args:
 
1060
                    logger.warning(u"Client %s is invalid", args)
 
1061
                    if self.use_dbus:
 
1062
                        # Emit D-Bus signal
 
1063
                        client.Rejected()
 
1064
                    break
 
1065
            else:
 
1066
                logger.error(u"Unknown client %s is invalid", args)
 
1067
        elif cmd == u"SENDING":
 
1068
            for client in self.clients:
 
1069
                if client.name == args:
 
1070
                    logger.info(u"Sending secret to %s", client.name)
 
1071
                    client.checked_ok()
 
1072
                    if self.use_dbus:
 
1073
                        # Emit D-Bus signal
 
1074
                        client.ReceivedSecret()
 
1075
                    break
 
1076
            else:
 
1077
                logger.error(u"Sending secret to unknown client %s",
 
1078
                             args)
 
1079
        else:
 
1080
            logger.error(u"Unknown IPC command: %r", cmdline)
 
1081
        
 
1082
        # Keep calling this function
1519
1083
        return True
1520
1084
 
1521
1085
 
1551
1115
            elif suffix == u"w":
1552
1116
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1553
1117
            else:
1554
 
                raise ValueError(u"Unknown suffix %r" % suffix)
1555
 
        except (ValueError, IndexError), e:
1556
 
            raise ValueError(e.message)
 
1118
                raise ValueError
 
1119
        except (ValueError, IndexError):
 
1120
            raise ValueError
1557
1121
        timevalue += delta
1558
1122
    return timevalue
1559
1123
 
1572
1136
        def if_nametoindex(interface):
1573
1137
            "Get an interface index the hard way, i.e. using fcntl()"
1574
1138
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1575
 
            with contextlib.closing(socket.socket()) as s:
 
1139
            with closing(socket.socket()) as s:
1576
1140
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1577
1141
                                    struct.pack(str(u"16s16x"),
1578
1142
                                                interface))
1598
1162
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1599
1163
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1600
1164
            raise OSError(errno.ENODEV,
1601
 
                          u"%s not a character device"
1602
 
                          % os.path.devnull)
 
1165
                          u"/dev/null not a character device")
1603
1166
        os.dup2(null, sys.stdin.fileno())
1604
1167
        os.dup2(null, sys.stdout.fileno())
1605
1168
        os.dup2(null, sys.stderr.fileno())
1609
1172
 
1610
1173
def main():
1611
1174
    
1612
 
    ##################################################################
 
1175
    ######################################################################
1613
1176
    # Parsing of options, both command line and config file
1614
1177
    
1615
1178
    parser = optparse.OptionParser(version = "%%prog %s" % version)
1709
1272
                        u"interval": u"5m",
1710
1273
                        u"checker": u"fping -q -- %%(host)s",
1711
1274
                        u"host": u"",
1712
 
                        u"approved_delay": u"0s",
1713
 
                        u"approved_duration": u"1s",
1714
1275
                        }
1715
1276
    client_config = configparser.SafeConfigParser(client_defaults)
1716
1277
    client_config.read(os.path.join(server_settings[u"configdir"],
1774
1335
    bus = dbus.SystemBus()
1775
1336
    # End of Avahi example code
1776
1337
    if use_dbus:
1777
 
        try:
1778
 
            bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1779
 
                                            bus, do_not_queue=True)
1780
 
        except dbus.exceptions.NameExistsException, e:
1781
 
            logger.error(unicode(e) + u", disabling D-Bus")
1782
 
            use_dbus = False
1783
 
            server_settings[u"use_dbus"] = False
1784
 
            tcp_server.use_dbus = False
 
1338
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1785
1339
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1786
1340
    service = AvahiService(name = server_settings[u"servicename"],
1787
1341
                           servicetype = u"_mandos._tcp",
1789
1343
    if server_settings["interface"]:
1790
1344
        service.interface = (if_nametoindex
1791
1345
                             (str(server_settings[u"interface"])))
1792
 
 
1793
 
    global multiprocessing_manager
1794
 
    multiprocessing_manager = multiprocessing.Manager()
1795
1346
    
1796
1347
    client_class = Client
1797
1348
    if use_dbus:
1798
1349
        client_class = functools.partial(ClientDBus, bus = bus)
1799
 
    def client_config_items(config, section):
1800
 
        special_settings = {
1801
 
            "approved_by_default":
1802
 
                lambda: config.getboolean(section,
1803
 
                                          "approved_by_default"),
1804
 
            }
1805
 
        for name, value in config.items(section):
1806
 
            try:
1807
 
                yield (name, special_settings[name]())
1808
 
            except KeyError:
1809
 
                yield (name, value)
1810
 
    
1811
1350
    tcp_server.clients.update(set(
1812
1351
            client_class(name = section,
1813
 
                         config= dict(client_config_items(
1814
 
                        client_config, section)))
 
1352
                         config= dict(client_config.items(section)))
1815
1353
            for section in client_config.sections()))
1816
1354
    if not tcp_server.clients:
1817
1355
        logger.warning(u"No clients defined")
1829
1367
        daemon()
1830
1368
    
1831
1369
    try:
1832
 
        with pidfile:
 
1370
        with closing(pidfile):
1833
1371
            pid = os.getpid()
1834
1372
            pidfile.write(str(pid) + "\n")
1835
1373
        del pidfile
1841
1379
        pass
1842
1380
    del pidfilename
1843
1381
    
 
1382
    def cleanup():
 
1383
        "Cleanup function; run on exit"
 
1384
        service.cleanup()
 
1385
        
 
1386
        while tcp_server.clients:
 
1387
            client = tcp_server.clients.pop()
 
1388
            client.disable_hook = None
 
1389
            client.disable()
 
1390
    
 
1391
    atexit.register(cleanup)
 
1392
    
1844
1393
    if not debug:
1845
1394
        signal.signal(signal.SIGINT, signal.SIG_IGN)
1846
1395
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1853
1402
                dbus.service.Object.__init__(self, bus, u"/")
1854
1403
            _interface = u"se.bsnet.fukt.Mandos"
1855
1404
            
1856
 
            @dbus.service.signal(_interface, signature=u"o")
1857
 
            def ClientAdded(self, objpath):
 
1405
            @dbus.service.signal(_interface, signature=u"oa{sv}")
 
1406
            def ClientAdded(self, objpath, properties):
1858
1407
                "D-Bus signal"
1859
1408
                pass
1860
1409
            
1861
 
            @dbus.service.signal(_interface, signature=u"ss")
1862
 
            def ClientNotFound(self, fingerprint, address):
 
1410
            @dbus.service.signal(_interface, signature=u"s")
 
1411
            def ClientNotFound(self, fingerprint):
1863
1412
                "D-Bus signal"
1864
1413
                pass
1865
1414
            
1879
1428
            def GetAllClientsWithProperties(self):
1880
1429
                "D-Bus method"
1881
1430
                return dbus.Dictionary(
1882
 
                    ((c.dbus_object_path, c.GetAll(u""))
 
1431
                    ((c.dbus_object_path, c.GetAllProperties())
1883
1432
                     for c in tcp_server.clients),
1884
1433
                    signature=u"oa{sv}")
1885
1434
            
1891
1440
                        tcp_server.clients.remove(c)
1892
1441
                        c.remove_from_connection()
1893
1442
                        # Don't signal anything except ClientRemoved
1894
 
                        c.disable(quiet=True)
 
1443
                        c.disable(signal=False)
1895
1444
                        # Emit D-Bus signal
1896
1445
                        self.ClientRemoved(object_path, c.name)
1897
1446
                        return
1898
 
                raise KeyError(object_path)
 
1447
                raise KeyError
1899
1448
            
1900
1449
            del _interface
1901
1450
        
1902
1451
        mandos_dbus_service = MandosDBusService()
1903
1452
    
1904
 
    def cleanup():
1905
 
        "Cleanup function; run on exit"
1906
 
        service.cleanup()
1907
 
        
1908
 
        while tcp_server.clients:
1909
 
            client = tcp_server.clients.pop()
1910
 
            if use_dbus:
1911
 
                client.remove_from_connection()
1912
 
            client.disable_hook = None
1913
 
            # Don't signal anything except ClientRemoved
1914
 
            client.disable(quiet=True)
1915
 
            if use_dbus:
1916
 
                # Emit D-Bus signal
1917
 
                mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1918
 
                                                  client.name)
1919
 
    
1920
 
    atexit.register(cleanup)
1921
 
    
1922
1453
    for client in tcp_server.clients:
1923
1454
        if use_dbus:
1924
1455
            # Emit D-Bus signal
1925
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
 
1456
            mandos_dbus_service.ClientAdded(client.dbus_object_path,
 
1457
                                            client.GetAllProperties())
1926
1458
        client.enable()
1927
1459
    
1928
1460
    tcp_server.enable()
1946
1478
            service.activate()
1947
1479
        except dbus.exceptions.DBusException, error:
1948
1480
            logger.critical(u"DBusException: %s", error)
1949
 
            cleanup()
1950
1481
            sys.exit(1)
1951
1482
        # End of Avahi example code
1952
1483
        
1959
1490
        main_loop.run()
1960
1491
    except AvahiError, error:
1961
1492
        logger.critical(u"AvahiError: %s", error)
1962
 
        cleanup()
1963
1493
        sys.exit(1)
1964
1494
    except KeyboardInterrupt:
1965
1495
        if debug:
1966
1496
            print >> sys.stderr
1967
1497
        logger.debug(u"Server received KeyboardInterrupt")
1968
1498
    logger.debug(u"Server exiting")
1969
 
    # Must run before the D-Bus bus name gets deregistered
1970
 
    cleanup()
1971
1499
 
1972
1500
if __name__ == '__main__':
1973
1501
    main()