/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2010-09-12 03:00:40 UTC
  • Revision ID: teddy@fukt.bsnet.se-20100912030040-b0uopyennste9fdh
Documentation changes:

* DBUS-API: New file documenting the server D-Bus interface.

* clients.conf: Add examples of new approval settings.

* debian/mandos.docs: Added "DBUS-API".

* mandos-clients.conf.xml (OPTIONS): Added "approved_by_default",
                                     "approval_delay", and
                                     "approval_duration".
* mandos.xml (D-BUS INTERFACE): Refer to the "DBUS-API" file.
  (BUGS): Remove mention of lack of a remote query interface.

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Lines of Context:
mandos
55
55
import logging
56
56
import logging.handlers
57
57
import pwd
58
 
from contextlib import closing
 
58
import contextlib
59
59
import struct
60
60
import fcntl
61
61
import functools
 
62
import cPickle as pickle
 
63
import multiprocessing
62
64
 
63
65
import dbus
64
66
import dbus.service
67
69
from dbus.mainloop.glib import DBusGMainLoop
68
70
import ctypes
69
71
import ctypes.util
 
72
import xml.dom.minidom
 
73
import inspect
70
74
 
71
75
try:
72
76
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
81
        SO_BINDTODEVICE = None
78
82
 
79
83
 
80
 
version = "1.0.11"
 
84
version = "1.0.14"
81
85
 
 
86
#logger = logging.getLogger(u'mandos')
82
87
logger = logging.Logger(u'mandos')
83
88
syslogger = (logging.handlers.SysLogHandler
84
89
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
152
157
                            u" after %i retries, exiting.",
153
158
                            self.rename_count)
154
159
            raise AvahiServiceError(u"Too many renames")
155
 
        self.name = self.server.GetAlternativeServiceName(self.name)
 
160
        self.name = unicode(self.server.GetAlternativeServiceName(self.name))
156
161
        logger.info(u"Changing Zeroconf service name to %r ...",
157
 
                    unicode(self.name))
 
162
                    self.name)
158
163
        syslogger.setFormatter(logging.Formatter
159
164
                               (u'Mandos (%s) [%%(process)d]:'
160
165
                                u' %%(levelname)s: %%(message)s'
161
166
                                % self.name))
162
167
        self.remove()
163
 
        self.add()
 
168
        try:
 
169
            self.add()
 
170
        except dbus.exceptions.DBusException, error:
 
171
            logger.critical(u"DBusException: %s", error)
 
172
            self.cleanup()
 
173
            os._exit(1)
164
174
        self.rename_count += 1
165
175
    def remove(self):
166
176
        """Derived from the Avahi example code"""
174
184
                                    self.server.EntryGroupNew()),
175
185
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
176
186
            self.group.connect_to_signal('StateChanged',
177
 
                                         self.entry_group_state_changed)
 
187
                                         self
 
188
                                         .entry_group_state_changed)
178
189
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
179
190
                     self.name, self.type)
180
191
        self.group.AddService(
188
199
        self.group.Commit()
189
200
    def entry_group_state_changed(self, state, error):
190
201
        """Derived from the Avahi example code"""
191
 
        logger.debug(u"Avahi state change: %i", state)
 
202
        logger.debug(u"Avahi entry group state change: %i", state)
192
203
        
193
204
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
194
205
            logger.debug(u"Zeroconf service established.")
207
218
            self.group = None
208
219
    def server_state_changed(self, state):
209
220
        """Derived from the Avahi example code"""
 
221
        logger.debug(u"Avahi server state change: %i", state)
210
222
        if state == avahi.SERVER_COLLISION:
211
223
            logger.error(u"Zeroconf server name collision")
212
224
            self.remove()
239
251
    enabled:    bool()
240
252
    last_checked_ok: datetime.datetime(); (UTC) or None
241
253
    timeout:    datetime.timedelta(); How long from last_checked_ok
242
 
                                      until this client is invalid
 
254
                                      until this client is disabled
243
255
    interval:   datetime.timedelta(); How often to start a new checker
244
256
    disable_hook:  If set, called by disable() as disable_hook(self)
245
257
    checker:    subprocess.Popen(); a running checker process used
246
258
                                    to see if the client lives.
247
259
                                    'None' if no process is running.
248
260
    checker_initiator_tag: a gobject event source tag, or None
249
 
    disable_initiator_tag:    - '' -
 
261
    disable_initiator_tag: - '' -
250
262
    checker_callback_tag:  - '' -
251
263
    checker_command: string; External command which is run to check if
252
264
                     client lives.  %() expansions are done at
253
265
                     runtime with vars(self) as dict, so that for
254
266
                     instance %(name)s can be used in the command.
255
267
    current_checker_command: string; current running checker_command
 
268
    approval_delay: datetime.timedelta(); Time to wait for approval
 
269
    _approved:   bool(); 'None' if not yet approved/disapproved
 
270
    approval_duration: datetime.timedelta(); Duration of one approval
256
271
    """
257
272
    
258
273
    @staticmethod
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))
 
274
    def _timedelta_to_milliseconds(td):
 
275
        "Convert a datetime.timedelta() to milliseconds"
 
276
        return ((td.days * 24 * 60 * 60 * 1000)
 
277
                + (td.seconds * 1000)
 
278
                + (td.microseconds // 1000))
264
279
    
265
280
    def timeout_milliseconds(self):
266
281
        "Return the 'timeout' attribute in milliseconds"
267
 
        return self._datetime_to_milliseconds(self.timeout)
 
282
        return self._timedelta_to_milliseconds(self.timeout)
268
283
    
269
284
    def interval_milliseconds(self):
270
285
        "Return the 'interval' attribute in milliseconds"
271
 
        return self._datetime_to_milliseconds(self.interval)
 
286
        return self._timedelta_to_milliseconds(self.interval)
 
287
 
 
288
    def approval_delay_milliseconds(self):
 
289
        return self._timedelta_to_milliseconds(self.approval_delay)
272
290
    
273
291
    def __init__(self, name = None, disable_hook=None, config=None):
274
292
        """Note: the 'checker' key in 'config' sets the
287
305
        if u"secret" in config:
288
306
            self.secret = config[u"secret"].decode(u"base64")
289
307
        elif u"secfile" in config:
290
 
            with closing(open(os.path.expanduser
291
 
                              (os.path.expandvars
292
 
                               (config[u"secfile"])))) as secfile:
 
308
            with open(os.path.expanduser(os.path.expandvars
 
309
                                         (config[u"secfile"])),
 
310
                      "rb") as secfile:
293
311
                self.secret = secfile.read()
294
312
        else:
295
313
            raise TypeError(u"No secret or secfile for client %s"
309
327
        self.checker_command = config[u"checker"]
310
328
        self.current_checker_command = None
311
329
        self.last_connect = None
 
330
        self._approved = None
 
331
        self.approved_by_default = config.get(u"approved_by_default",
 
332
                                              True)
 
333
        self.approvals_pending = 0
 
334
        self.approval_delay = string_to_delta(
 
335
            config[u"approval_delay"])
 
336
        self.approval_duration = string_to_delta(
 
337
            config[u"approval_duration"])
 
338
        self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
312
339
    
 
340
    def send_changedstate(self):
 
341
        self.changedstate.acquire()
 
342
        self.changedstate.notify_all()
 
343
        self.changedstate.release()
 
344
        
313
345
    def enable(self):
314
346
        """Start this client's checker and timeout hooks"""
315
347
        if getattr(self, u"enabled", False):
316
348
            # Already enabled
317
349
            return
 
350
        self.send_changedstate()
318
351
        self.last_enabled = datetime.datetime.utcnow()
319
352
        # Schedule a new checker to be started an 'interval' from now,
320
353
        # and every interval from then on.
321
354
        self.checker_initiator_tag = (gobject.timeout_add
322
355
                                      (self.interval_milliseconds(),
323
356
                                       self.start_checker))
324
 
        # Also start a new checker *right now*.
325
 
        self.start_checker()
326
357
        # Schedule a disable() when 'timeout' has passed
327
358
        self.disable_initiator_tag = (gobject.timeout_add
328
359
                                   (self.timeout_milliseconds(),
329
360
                                    self.disable))
330
361
        self.enabled = True
 
362
        # Also start a new checker *right now*.
 
363
        self.start_checker()
331
364
    
332
 
    def disable(self):
 
365
    def disable(self, quiet=True):
333
366
        """Disable this client."""
334
367
        if not getattr(self, "enabled", False):
335
368
            return False
336
 
        logger.info(u"Disabling client %s", self.name)
 
369
        if not quiet:
 
370
            self.send_changedstate()
 
371
        if not quiet:
 
372
            logger.info(u"Disabling client %s", self.name)
337
373
        if getattr(self, u"disable_initiator_tag", False):
338
374
            gobject.source_remove(self.disable_initiator_tag)
339
375
            self.disable_initiator_tag = None
391
427
        # client would inevitably timeout, since no checker would get
392
428
        # a chance to run to completion.  If we instead leave running
393
429
        # checkers alone, the checker would have to take more time
394
 
        # than 'timeout' for the client to be declared invalid, which
395
 
        # is as it should be.
 
430
        # than 'timeout' for the client to be disabled, which is as it
 
431
        # should be.
396
432
        
397
433
        # If a checker exists, make sure it is not a zombie
398
 
        if self.checker is not None:
 
434
        try:
399
435
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
436
        except (AttributeError, OSError), error:
 
437
            if (isinstance(error, OSError)
 
438
                and error.errno != errno.ECHILD):
 
439
                raise error
 
440
        else:
400
441
            if pid:
401
442
                logger.warning(u"Checker was a zombie")
402
443
                gobject.source_remove(self.checker_callback_tag)
458
499
        logger.debug(u"Stopping checker for %(name)s", vars(self))
459
500
        try:
460
501
            os.kill(self.checker.pid, signal.SIGTERM)
461
 
            #os.sleep(0.5)
 
502
            #time.sleep(0.5)
462
503
            #if self.checker.poll() is None:
463
504
            #    os.kill(self.checker.pid, signal.SIGKILL)
464
505
        except OSError, error:
465
506
            if error.errno != errno.ESRCH: # No such process
466
507
                raise
467
508
        self.checker = None
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):
 
509
 
 
510
def dbus_service_property(dbus_interface, signature=u"v",
 
511
                          access=u"readwrite", byte_arrays=False):
 
512
    """Decorators for marking methods of a DBusObjectWithProperties to
 
513
    become properties on the D-Bus.
 
514
    
 
515
    The decorated method will be called with no arguments by "Get"
 
516
    and with one argument by "Set".
 
517
    
 
518
    The parameters, where they are supported, are the same as
 
519
    dbus.service.method, except there is only "signature", since the
 
520
    type from Get() and the type sent to Set() is the same.
 
521
    """
 
522
    # Encoding deeply encoded byte arrays is not supported yet by the
 
523
    # "Set" method, so we fail early here:
 
524
    if byte_arrays and signature != u"ay":
 
525
        raise ValueError(u"Byte arrays not supported for non-'ay'"
 
526
                         u" signature %r" % signature)
 
527
    def decorator(func):
 
528
        func._dbus_is_property = True
 
529
        func._dbus_interface = dbus_interface
 
530
        func._dbus_signature = signature
 
531
        func._dbus_access = access
 
532
        func._dbus_name = func.__name__
 
533
        if func._dbus_name.endswith(u"_dbus_property"):
 
534
            func._dbus_name = func._dbus_name[:-14]
 
535
        func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
 
536
        return func
 
537
    return decorator
 
538
 
 
539
 
 
540
class DBusPropertyException(dbus.exceptions.DBusException):
 
541
    """A base class for D-Bus property-related exceptions
 
542
    """
 
543
    def __unicode__(self):
 
544
        return unicode(str(self))
 
545
 
 
546
 
 
547
class DBusPropertyAccessException(DBusPropertyException):
 
548
    """A property's access permissions disallows an operation.
 
549
    """
 
550
    pass
 
551
 
 
552
 
 
553
class DBusPropertyNotFound(DBusPropertyException):
 
554
    """An attempt was made to access a non-existing property.
 
555
    """
 
556
    pass
 
557
 
 
558
 
 
559
class DBusObjectWithProperties(dbus.service.Object):
 
560
    """A D-Bus object with properties.
 
561
 
 
562
    Classes inheriting from this can use the dbus_service_property
 
563
    decorator to expose methods as D-Bus properties.  It exposes the
 
564
    standard Get(), Set(), and GetAll() methods on the D-Bus.
 
565
    """
 
566
    
 
567
    @staticmethod
 
568
    def _is_dbus_property(obj):
 
569
        return getattr(obj, u"_dbus_is_property", False)
 
570
    
 
571
    def _get_all_dbus_properties(self):
 
572
        """Returns a generator of (name, attribute) pairs
 
573
        """
 
574
        return ((prop._dbus_name, prop)
 
575
                for name, prop in
 
576
                inspect.getmembers(self, self._is_dbus_property))
 
577
    
 
578
    def _get_dbus_property(self, interface_name, property_name):
 
579
        """Returns a bound method if one exists which is a D-Bus
 
580
        property with the specified name and interface.
 
581
        """
 
582
        for name in (property_name,
 
583
                     property_name + u"_dbus_property"):
 
584
            prop = getattr(self, name, None)
 
585
            if (prop is None
 
586
                or not self._is_dbus_property(prop)
 
587
                or prop._dbus_name != property_name
 
588
                or (interface_name and prop._dbus_interface
 
589
                    and interface_name != prop._dbus_interface)):
 
590
                continue
 
591
            return prop
 
592
        # No such property
 
593
        raise DBusPropertyNotFound(self.dbus_object_path + u":"
 
594
                                   + interface_name + u"."
 
595
                                   + property_name)
 
596
    
 
597
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
 
598
                         out_signature=u"v")
 
599
    def Get(self, interface_name, property_name):
 
600
        """Standard D-Bus property Get() method, see D-Bus standard.
 
601
        """
 
602
        prop = self._get_dbus_property(interface_name, property_name)
 
603
        if prop._dbus_access == u"write":
 
604
            raise DBusPropertyAccessException(property_name)
 
605
        value = prop()
 
606
        if not hasattr(value, u"variant_level"):
 
607
            return value
 
608
        return type(value)(value, variant_level=value.variant_level+1)
 
609
    
 
610
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
 
611
    def Set(self, interface_name, property_name, value):
 
612
        """Standard D-Bus property Set() method, see D-Bus standard.
 
613
        """
 
614
        prop = self._get_dbus_property(interface_name, property_name)
 
615
        if prop._dbus_access == u"read":
 
616
            raise DBusPropertyAccessException(property_name)
 
617
        if prop._dbus_get_args_options[u"byte_arrays"]:
 
618
            # The byte_arrays option is not supported yet on
 
619
            # signatures other than "ay".
 
620
            if prop._dbus_signature != u"ay":
 
621
                raise ValueError
 
622
            value = dbus.ByteArray(''.join(unichr(byte)
 
623
                                           for byte in value))
 
624
        prop(value)
 
625
    
 
626
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
 
627
                         out_signature=u"a{sv}")
 
628
    def GetAll(self, interface_name):
 
629
        """Standard D-Bus property GetAll() method, see D-Bus
 
630
        standard.
 
631
 
 
632
        Note: Will not include properties with access="write".
 
633
        """
 
634
        all = {}
 
635
        for name, prop in self._get_all_dbus_properties():
 
636
            if (interface_name
 
637
                and interface_name != prop._dbus_interface):
 
638
                # Interface non-empty but did not match
 
639
                continue
 
640
            # Ignore write-only properties
 
641
            if prop._dbus_access == u"write":
 
642
                continue
 
643
            value = prop()
 
644
            if not hasattr(value, u"variant_level"):
 
645
                all[name] = value
 
646
                continue
 
647
            all[name] = type(value)(value, variant_level=
 
648
                                    value.variant_level+1)
 
649
        return dbus.Dictionary(all, signature=u"sv")
 
650
    
 
651
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
652
                         out_signature=u"s",
 
653
                         path_keyword='object_path',
 
654
                         connection_keyword='connection')
 
655
    def Introspect(self, object_path, connection):
 
656
        """Standard D-Bus method, overloaded to insert property tags.
 
657
        """
 
658
        xmlstring = dbus.service.Object.Introspect(self, object_path,
 
659
                                                   connection)
 
660
        try:
 
661
            document = xml.dom.minidom.parseString(xmlstring)
 
662
            def make_tag(document, name, prop):
 
663
                e = document.createElement(u"property")
 
664
                e.setAttribute(u"name", name)
 
665
                e.setAttribute(u"type", prop._dbus_signature)
 
666
                e.setAttribute(u"access", prop._dbus_access)
 
667
                return e
 
668
            for if_tag in document.getElementsByTagName(u"interface"):
 
669
                for tag in (make_tag(document, name, prop)
 
670
                            for name, prop
 
671
                            in self._get_all_dbus_properties()
 
672
                            if prop._dbus_interface
 
673
                            == if_tag.getAttribute(u"name")):
 
674
                    if_tag.appendChild(tag)
 
675
                # Add the names to the return values for the
 
676
                # "org.freedesktop.DBus.Properties" methods
 
677
                if (if_tag.getAttribute(u"name")
 
678
                    == u"org.freedesktop.DBus.Properties"):
 
679
                    for cn in if_tag.getElementsByTagName(u"method"):
 
680
                        if cn.getAttribute(u"name") == u"Get":
 
681
                            for arg in cn.getElementsByTagName(u"arg"):
 
682
                                if (arg.getAttribute(u"direction")
 
683
                                    == u"out"):
 
684
                                    arg.setAttribute(u"name", u"value")
 
685
                        elif cn.getAttribute(u"name") == u"GetAll":
 
686
                            for arg in cn.getElementsByTagName(u"arg"):
 
687
                                if (arg.getAttribute(u"direction")
 
688
                                    == u"out"):
 
689
                                    arg.setAttribute(u"name", u"props")
 
690
            xmlstring = document.toxml(u"utf-8")
 
691
            document.unlink()
 
692
        except (AttributeError, xml.dom.DOMException,
 
693
                xml.parsers.expat.ExpatError), error:
 
694
            logger.error(u"Failed to override Introspection method",
 
695
                         error)
 
696
        return xmlstring
 
697
 
 
698
 
 
699
class ClientDBus(Client, DBusObjectWithProperties):
481
700
    """A Client class using D-Bus
482
701
    
483
702
    Attributes:
487
706
    # dbus.service.Object doesn't use super(), so we can't either.
488
707
    
489
708
    def __init__(self, bus = None, *args, **kwargs):
 
709
        self._approvals_pending = 0
490
710
        self.bus = bus
491
711
        Client.__init__(self, *args, **kwargs)
492
712
        # Only now, when this client is initialized, can it show up on
494
714
        self.dbus_object_path = (dbus.ObjectPath
495
715
                                 (u"/clients/"
496
716
                                  + self.name.replace(u".", u"_")))
497
 
        dbus.service.Object.__init__(self, self.bus,
498
 
                                     self.dbus_object_path)
 
717
        DBusObjectWithProperties.__init__(self, self.bus,
 
718
                                          self.dbus_object_path)
 
719
        
 
720
    def _get_approvals_pending(self):
 
721
        return self._approvals_pending
 
722
    def _set_approvals_pending(self, value):
 
723
        old_value = self._approvals_pending
 
724
        self._approvals_pending = value
 
725
        bval = bool(value)
 
726
        if (hasattr(self, "dbus_object_path")
 
727
            and bval is not bool(old_value)):
 
728
            dbus_bool = dbus.Boolean(bval, variant_level=1)
 
729
            self.PropertyChanged(dbus.String(u"ApprovalPending"),
 
730
                                 dbus_bool)
 
731
 
 
732
    approvals_pending = property(_get_approvals_pending,
 
733
                                 _set_approvals_pending)
 
734
    del _get_approvals_pending, _set_approvals_pending
499
735
    
500
736
    @staticmethod
501
737
    def _datetime_to_dbus(dt, variant_level=0):
508
744
        r = Client.enable(self)
509
745
        if oldstate != self.enabled:
510
746
            # Emit D-Bus signals
511
 
            self.PropertyChanged(dbus.String(u"enabled"),
 
747
            self.PropertyChanged(dbus.String(u"Enabled"),
512
748
                                 dbus.Boolean(True, variant_level=1))
513
749
            self.PropertyChanged(
514
 
                dbus.String(u"last_enabled"),
 
750
                dbus.String(u"LastEnabled"),
515
751
                self._datetime_to_dbus(self.last_enabled,
516
752
                                       variant_level=1))
517
753
        return r
518
754
    
519
 
    def disable(self, signal = True):
 
755
    def disable(self, quiet = False):
520
756
        oldstate = getattr(self, u"enabled", False)
521
 
        r = Client.disable(self)
522
 
        if signal and oldstate != self.enabled:
 
757
        r = Client.disable(self, quiet=quiet)
 
758
        if not quiet and oldstate != self.enabled:
523
759
            # Emit D-Bus signal
524
 
            self.PropertyChanged(dbus.String(u"enabled"),
 
760
            self.PropertyChanged(dbus.String(u"Enabled"),
525
761
                                 dbus.Boolean(False, variant_level=1))
526
762
        return r
527
763
    
530
766
            self.remove_from_connection()
531
767
        except LookupError:
532
768
            pass
533
 
        if hasattr(dbus.service.Object, u"__del__"):
534
 
            dbus.service.Object.__del__(self, *args, **kwargs)
 
769
        if hasattr(DBusObjectWithProperties, u"__del__"):
 
770
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
535
771
        Client.__del__(self, *args, **kwargs)
536
772
    
537
773
    def checker_callback(self, pid, condition, command,
539
775
        self.checker_callback_tag = None
540
776
        self.checker = None
541
777
        # Emit D-Bus signal
542
 
        self.PropertyChanged(dbus.String(u"checker_running"),
 
778
        self.PropertyChanged(dbus.String(u"CheckerRunning"),
543
779
                             dbus.Boolean(False, variant_level=1))
544
780
        if os.WIFEXITED(condition):
545
781
            exitstatus = os.WEXITSTATUS(condition)
560
796
        r = Client.checked_ok(self, *args, **kwargs)
561
797
        # Emit D-Bus signal
562
798
        self.PropertyChanged(
563
 
            dbus.String(u"last_checked_ok"),
 
799
            dbus.String(u"LastCheckedOK"),
564
800
            (self._datetime_to_dbus(self.last_checked_ok,
565
801
                                    variant_level=1)))
566
802
        return r
578
814
            # Emit D-Bus signal
579
815
            self.CheckerStarted(self.current_checker_command)
580
816
            self.PropertyChanged(
581
 
                dbus.String(u"checker_running"),
 
817
                dbus.String(u"CheckerRunning"),
582
818
                dbus.Boolean(True, variant_level=1))
583
819
        return r
584
820
    
587
823
        r = Client.stop_checker(self, *args, **kwargs)
588
824
        if (old_checker is not None
589
825
            and getattr(self, u"checker", None) is None):
590
 
            self.PropertyChanged(dbus.String(u"checker_running"),
 
826
            self.PropertyChanged(dbus.String(u"CheckerRunning"),
591
827
                                 dbus.Boolean(False, variant_level=1))
592
828
        return r
593
 
    
594
 
    ## D-Bus methods & signals
 
829
 
 
830
    def _reset_approved(self):
 
831
        self._approved = None
 
832
        return False
 
833
    
 
834
    def approve(self, value=True):
 
835
        self.send_changedstate()
 
836
        self._approved = value
 
837
        gobject.timeout_add(self._timedelta_to_milliseconds
 
838
                            (self.approval_duration),
 
839
                            self._reset_approved)
 
840
    
 
841
    
 
842
    ## D-Bus methods, signals & properties
595
843
    _interface = u"se.bsnet.fukt.Mandos.Client"
596
844
    
597
 
    # CheckedOK - method
598
 
    @dbus.service.method(_interface)
599
 
    def CheckedOK(self):
600
 
        return self.checked_ok()
 
845
    ## Signals
601
846
    
602
847
    # CheckerCompleted - signal
603
848
    @dbus.service.signal(_interface, signature=u"nxs")
611
856
        "D-Bus signal"
612
857
        pass
613
858
    
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
 
    
662
859
    # PropertyChanged - signal
663
860
    @dbus.service.signal(_interface, signature=u"sv")
664
861
    def PropertyChanged(self, property, value):
665
862
        "D-Bus signal"
666
863
        pass
667
864
    
668
 
    # ReceivedSecret - signal
 
865
    # GotSecret - signal
669
866
    @dbus.service.signal(_interface)
670
 
    def ReceivedSecret(self):
671
 
        "D-Bus signal"
 
867
    def GotSecret(self):
 
868
        """D-Bus signal
 
869
        Is sent after a successful transfer of secret from the Mandos
 
870
        server to mandos-client
 
871
        """
672
872
        pass
673
873
    
674
874
    # Rejected - signal
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)))
 
875
    @dbus.service.signal(_interface, signature=u"s")
 
876
    def Rejected(self, reason):
 
877
        "D-Bus signal"
 
878
        pass
 
879
    
 
880
    # NeedApproval - signal
 
881
    @dbus.service.signal(_interface, signature=u"tb")
 
882
    def NeedApproval(self, timeout, default):
 
883
        "D-Bus signal"
 
884
        pass
 
885
    
 
886
    ## Methods
 
887
 
 
888
    # Approve - method
 
889
    @dbus.service.method(_interface, in_signature=u"b")
 
890
    def Approve(self, value):
 
891
        self.approve(value)
 
892
 
 
893
    # CheckedOK - method
 
894
    @dbus.service.method(_interface)
 
895
    def CheckedOK(self):
 
896
        return self.checked_ok()
723
897
    
724
898
    # Enable - method
725
899
    @dbus.service.method(_interface)
744
918
    def StopChecker(self):
745
919
        self.stop_checker()
746
920
    
 
921
    ## Properties
 
922
    
 
923
    # ApprovalPending - property
 
924
    @dbus_service_property(_interface, signature=u"b", access=u"read")
 
925
    def ApprovalPending_dbus_property(self):
 
926
        return dbus.Boolean(bool(self.approvals_pending))
 
927
    
 
928
    # ApprovedByDefault - property
 
929
    @dbus_service_property(_interface, signature=u"b",
 
930
                           access=u"readwrite")
 
931
    def ApprovedByDefault_dbus_property(self, value=None):
 
932
        if value is None:       # get
 
933
            return dbus.Boolean(self.approved_by_default)
 
934
        self.approved_by_default = bool(value)
 
935
        # Emit D-Bus signal
 
936
        self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
 
937
                             dbus.Boolean(value, variant_level=1))
 
938
    
 
939
    # ApprovalDelay - property
 
940
    @dbus_service_property(_interface, signature=u"t",
 
941
                           access=u"readwrite")
 
942
    def ApprovalDelay_dbus_property(self, value=None):
 
943
        if value is None:       # get
 
944
            return dbus.UInt64(self.approval_delay_milliseconds())
 
945
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
 
946
        # Emit D-Bus signal
 
947
        self.PropertyChanged(dbus.String(u"ApprovalDelay"),
 
948
                             dbus.UInt64(value, variant_level=1))
 
949
    
 
950
    # ApprovalDuration - property
 
951
    @dbus_service_property(_interface, signature=u"t",
 
952
                           access=u"readwrite")
 
953
    def ApprovalDuration_dbus_property(self, value=None):
 
954
        if value is None:       # get
 
955
            return dbus.UInt64(self._timedelta_to_milliseconds(
 
956
                    self.approval_duration))
 
957
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
 
958
        # Emit D-Bus signal
 
959
        self.PropertyChanged(dbus.String(u"ApprovalDuration"),
 
960
                             dbus.UInt64(value, variant_level=1))
 
961
    
 
962
    # Name - property
 
963
    @dbus_service_property(_interface, signature=u"s", access=u"read")
 
964
    def Name_dbus_property(self):
 
965
        return dbus.String(self.name)
 
966
    
 
967
    # Fingerprint - property
 
968
    @dbus_service_property(_interface, signature=u"s", access=u"read")
 
969
    def Fingerprint_dbus_property(self):
 
970
        return dbus.String(self.fingerprint)
 
971
    
 
972
    # Host - property
 
973
    @dbus_service_property(_interface, signature=u"s",
 
974
                           access=u"readwrite")
 
975
    def Host_dbus_property(self, value=None):
 
976
        if value is None:       # get
 
977
            return dbus.String(self.host)
 
978
        self.host = value
 
979
        # Emit D-Bus signal
 
980
        self.PropertyChanged(dbus.String(u"Host"),
 
981
                             dbus.String(value, variant_level=1))
 
982
    
 
983
    # Created - property
 
984
    @dbus_service_property(_interface, signature=u"s", access=u"read")
 
985
    def Created_dbus_property(self):
 
986
        return dbus.String(self._datetime_to_dbus(self.created))
 
987
    
 
988
    # LastEnabled - property
 
989
    @dbus_service_property(_interface, signature=u"s", access=u"read")
 
990
    def LastEnabled_dbus_property(self):
 
991
        if self.last_enabled is None:
 
992
            return dbus.String(u"")
 
993
        return dbus.String(self._datetime_to_dbus(self.last_enabled))
 
994
    
 
995
    # Enabled - property
 
996
    @dbus_service_property(_interface, signature=u"b",
 
997
                           access=u"readwrite")
 
998
    def Enabled_dbus_property(self, value=None):
 
999
        if value is None:       # get
 
1000
            return dbus.Boolean(self.enabled)
 
1001
        if value:
 
1002
            self.enable()
 
1003
        else:
 
1004
            self.disable()
 
1005
    
 
1006
    # LastCheckedOK - property
 
1007
    @dbus_service_property(_interface, signature=u"s",
 
1008
                           access=u"readwrite")
 
1009
    def LastCheckedOK_dbus_property(self, value=None):
 
1010
        if value is not None:
 
1011
            self.checked_ok()
 
1012
            return
 
1013
        if self.last_checked_ok is None:
 
1014
            return dbus.String(u"")
 
1015
        return dbus.String(self._datetime_to_dbus(self
 
1016
                                                  .last_checked_ok))
 
1017
    
 
1018
    # Timeout - property
 
1019
    @dbus_service_property(_interface, signature=u"t",
 
1020
                           access=u"readwrite")
 
1021
    def Timeout_dbus_property(self, value=None):
 
1022
        if value is None:       # get
 
1023
            return dbus.UInt64(self.timeout_milliseconds())
 
1024
        self.timeout = datetime.timedelta(0, 0, 0, value)
 
1025
        # Emit D-Bus signal
 
1026
        self.PropertyChanged(dbus.String(u"Timeout"),
 
1027
                             dbus.UInt64(value, variant_level=1))
 
1028
        if getattr(self, u"disable_initiator_tag", None) is None:
 
1029
            return
 
1030
        # Reschedule timeout
 
1031
        gobject.source_remove(self.disable_initiator_tag)
 
1032
        self.disable_initiator_tag = None
 
1033
        time_to_die = (self.
 
1034
                       _timedelta_to_milliseconds((self
 
1035
                                                   .last_checked_ok
 
1036
                                                   + self.timeout)
 
1037
                                                  - datetime.datetime
 
1038
                                                  .utcnow()))
 
1039
        if time_to_die <= 0:
 
1040
            # The timeout has passed
 
1041
            self.disable()
 
1042
        else:
 
1043
            self.disable_initiator_tag = (gobject.timeout_add
 
1044
                                          (time_to_die, self.disable))
 
1045
    
 
1046
    # Interval - property
 
1047
    @dbus_service_property(_interface, signature=u"t",
 
1048
                           access=u"readwrite")
 
1049
    def Interval_dbus_property(self, value=None):
 
1050
        if value is None:       # get
 
1051
            return dbus.UInt64(self.interval_milliseconds())
 
1052
        self.interval = datetime.timedelta(0, 0, 0, value)
 
1053
        # Emit D-Bus signal
 
1054
        self.PropertyChanged(dbus.String(u"Interval"),
 
1055
                             dbus.UInt64(value, variant_level=1))
 
1056
        if getattr(self, u"checker_initiator_tag", None) is None:
 
1057
            return
 
1058
        # Reschedule checker run
 
1059
        gobject.source_remove(self.checker_initiator_tag)
 
1060
        self.checker_initiator_tag = (gobject.timeout_add
 
1061
                                      (value, self.start_checker))
 
1062
        self.start_checker()    # Start one now, too
 
1063
 
 
1064
    # Checker - property
 
1065
    @dbus_service_property(_interface, signature=u"s",
 
1066
                           access=u"readwrite")
 
1067
    def Checker_dbus_property(self, value=None):
 
1068
        if value is None:       # get
 
1069
            return dbus.String(self.checker_command)
 
1070
        self.checker_command = value
 
1071
        # Emit D-Bus signal
 
1072
        self.PropertyChanged(dbus.String(u"Checker"),
 
1073
                             dbus.String(self.checker_command,
 
1074
                                         variant_level=1))
 
1075
    
 
1076
    # CheckerRunning - property
 
1077
    @dbus_service_property(_interface, signature=u"b",
 
1078
                           access=u"readwrite")
 
1079
    def CheckerRunning_dbus_property(self, value=None):
 
1080
        if value is None:       # get
 
1081
            return dbus.Boolean(self.checker is not None)
 
1082
        if value:
 
1083
            self.start_checker()
 
1084
        else:
 
1085
            self.stop_checker()
 
1086
    
 
1087
    # ObjectPath - property
 
1088
    @dbus_service_property(_interface, signature=u"o", access=u"read")
 
1089
    def ObjectPath_dbus_property(self):
 
1090
        return self.dbus_object_path # is already a dbus.ObjectPath
 
1091
    
 
1092
    # Secret = property
 
1093
    @dbus_service_property(_interface, signature=u"ay",
 
1094
                           access=u"write", byte_arrays=True)
 
1095
    def Secret_dbus_property(self, value):
 
1096
        self.secret = str(value)
 
1097
    
747
1098
    del _interface
748
1099
 
749
1100
 
 
1101
class ProxyClient(object):
 
1102
    def __init__(self, child_pipe, fpr, address):
 
1103
        self._pipe = child_pipe
 
1104
        self._pipe.send(('init', fpr, address))
 
1105
        if not self._pipe.recv():
 
1106
            raise KeyError()
 
1107
 
 
1108
    def __getattribute__(self, name):
 
1109
        if(name == '_pipe'):
 
1110
            return super(ProxyClient, self).__getattribute__(name)
 
1111
        self._pipe.send(('getattr', name))
 
1112
        data = self._pipe.recv()
 
1113
        if data[0] == 'data':
 
1114
            return data[1]
 
1115
        if data[0] == 'function':
 
1116
            def func(*args, **kwargs):
 
1117
                self._pipe.send(('funcall', name, args, kwargs))
 
1118
                return self._pipe.recv()[1]
 
1119
            return func
 
1120
 
 
1121
    def __setattr__(self, name, value):
 
1122
        if(name == '_pipe'):
 
1123
            return super(ProxyClient, self).__setattr__(name, value)
 
1124
        self._pipe.send(('setattr', name, value))
 
1125
 
 
1126
 
750
1127
class ClientHandler(socketserver.BaseRequestHandler, object):
751
1128
    """A class to handle client connections.
752
1129
    
754
1131
    Note: This will run in its own forked process."""
755
1132
    
756
1133
    def handle(self):
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:
 
1134
        with contextlib.closing(self.server.child_pipe) as child_pipe:
 
1135
            logger.info(u"TCP connection from: %s",
 
1136
                        unicode(self.client_address))
 
1137
            logger.debug(u"Pipe FD: %d",
 
1138
                         self.server.child_pipe.fileno())
 
1139
 
762
1140
            session = (gnutls.connection
763
1141
                       .ClientSession(self.request,
764
1142
                                      gnutls.connection
765
1143
                                      .X509Credentials()))
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
 
            
 
1144
 
776
1145
            # Note: gnutls.connection.X509Credentials is really a
777
1146
            # generic GnuTLS certificate credentials object so long as
778
1147
            # no X.509 keys are added to it.  Therefore, we can use it
779
1148
            # here despite using OpenPGP certificates.
780
 
            
 
1149
 
781
1150
            #priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
782
1151
            #                      u"+AES-256-CBC", u"+SHA1",
783
1152
            #                      u"+COMP-NULL", u"+CTYPE-OPENPGP",
789
1158
            (gnutls.library.functions
790
1159
             .gnutls_priority_set_direct(session._c_object,
791
1160
                                         priority, None))
792
 
            
 
1161
 
 
1162
            # Start communication using the Mandos protocol
 
1163
            # Get protocol number
 
1164
            line = self.request.makefile().readline()
 
1165
            logger.debug(u"Protocol version: %r", line)
 
1166
            try:
 
1167
                if int(line.strip().split()[0]) > 1:
 
1168
                    raise RuntimeError
 
1169
            except (ValueError, IndexError, RuntimeError), error:
 
1170
                logger.error(u"Unknown protocol version: %s", error)
 
1171
                return
 
1172
 
 
1173
            # Start GnuTLS connection
793
1174
            try:
794
1175
                session.handshake()
795
1176
            except gnutls.errors.GNUTLSError, error:
798
1179
                # established.  Just abandon the request.
799
1180
                return
800
1181
            logger.debug(u"Handshake succeeded")
 
1182
 
 
1183
            approval_required = False
801
1184
            try:
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)
 
1185
                try:
 
1186
                    fpr = self.fingerprint(self.peer_certificate
 
1187
                                           (session))
 
1188
                except (TypeError, gnutls.errors.GNUTLSError), error:
 
1189
                    logger.warning(u"Bad certificate: %s", error)
 
1190
                    return
 
1191
                logger.debug(u"Fingerprint: %s", fpr)
 
1192
 
 
1193
                try:
 
1194
                    client = ProxyClient(child_pipe, fpr,
 
1195
                                         self.client_address)
 
1196
                except KeyError:
 
1197
                    return
 
1198
                
 
1199
                if client.approval_delay:
 
1200
                    delay = client.approval_delay
 
1201
                    client.approvals_pending += 1
 
1202
                    approval_required = True
 
1203
                
 
1204
                while True:
 
1205
                    if not client.enabled:
 
1206
                        logger.warning(u"Client %s is disabled",
 
1207
                                       client.name)
 
1208
                        if self.server.use_dbus:
 
1209
                            # Emit D-Bus signal
 
1210
                            client.Rejected("Disabled")                    
 
1211
                        return
 
1212
                    
 
1213
                    if client._approved or not client.approval_delay:
 
1214
                        #We are approved or approval is disabled
 
1215
                        break
 
1216
                    elif client._approved is None:
 
1217
                        logger.info(u"Client %s needs approval",
 
1218
                                    client.name)
 
1219
                        if self.server.use_dbus:
 
1220
                            # Emit D-Bus signal
 
1221
                            client.NeedApproval(
 
1222
                                client.approval_delay_milliseconds(),
 
1223
                                client.approved_by_default)
 
1224
                    else:
 
1225
                        logger.warning(u"Client %s was not approved",
 
1226
                                       client.name)
 
1227
                        if self.server.use_dbus:
 
1228
                            # Emit D-Bus signal
 
1229
                            client.Rejected("Denied")
 
1230
                        return
 
1231
                    
 
1232
                    #wait until timeout or approved
 
1233
                    #x = float(client._timedelta_to_milliseconds(delay))
 
1234
                    time = datetime.datetime.now()
 
1235
                    client.changedstate.acquire()
 
1236
                    client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
 
1237
                    client.changedstate.release()
 
1238
                    time2 = datetime.datetime.now()
 
1239
                    if (time2 - time) >= delay:
 
1240
                        if not client.approved_by_default:
 
1241
                            logger.warning("Client %s timed out while"
 
1242
                                           " waiting for approval",
 
1243
                                           client.name)
 
1244
                            if self.server.use_dbus:
 
1245
                                # Emit D-Bus signal
 
1246
                                client.Rejected("Timed out")
 
1247
                            return
 
1248
                        else:
 
1249
                            break
 
1250
                    else:
 
1251
                        delay -= time2 - time
 
1252
                
 
1253
                sent_size = 0
 
1254
                while sent_size < len(client.secret):
 
1255
                    try:
 
1256
                        sent = session.send(client.secret[sent_size:])
 
1257
                    except (gnutls.errors.GNUTLSError), error:
 
1258
                        logger.warning("gnutls send failed")
 
1259
                        return
 
1260
                    logger.debug(u"Sent: %d, remaining: %d",
 
1261
                                 sent, len(client.secret)
 
1262
                                 - (sent_size + sent))
 
1263
                    sent_size += sent
 
1264
 
 
1265
                logger.info(u"Sending secret to %s", client.name)
 
1266
                # bump the timeout as if seen
 
1267
                client.checked_ok()
 
1268
                if self.server.use_dbus:
 
1269
                    # Emit D-Bus signal
 
1270
                    client.GotSecret()
808
1271
            
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\n" % fpr)
815
 
                session.bye()
816
 
                return
817
 
            # Have to check if client.still_valid(), since it is
818
 
            # possible that the client timed out while establishing
819
 
            # the GnuTLS session.
820
 
            if not client.still_valid():
821
 
                ipc.write(u"INVALID %s\n" % client.name)
822
 
                session.bye()
823
 
                return
824
 
            ipc.write(u"SENDING %s\n" % client.name)
825
 
            sent_size = 0
826
 
            while sent_size < len(client.secret):
827
 
                sent = session.send(client.secret[sent_size:])
828
 
                logger.debug(u"Sent: %d, remaining: %d",
829
 
                             sent, len(client.secret)
830
 
                             - (sent_size + sent))
831
 
                sent_size += sent
832
 
            session.bye()
 
1272
            finally:
 
1273
                if approval_required:
 
1274
                    client.approvals_pending -= 1
 
1275
                try:
 
1276
                    session.bye()
 
1277
                except (gnutls.errors.GNUTLSError), error:
 
1278
                    logger.warning("GnuTLS bye failed")
833
1279
    
834
1280
    @staticmethod
835
1281
    def peer_certificate(session):
895
1341
        return hex_fpr
896
1342
 
897
1343
 
898
 
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
899
 
    """Like socketserver.ForkingMixIn, but also pass a pipe."""
 
1344
class MultiprocessingMixIn(object):
 
1345
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
 
1346
    def sub_process_main(self, request, address):
 
1347
        try:
 
1348
            self.finish_request(request, address)
 
1349
        except:
 
1350
            self.handle_error(request, address)
 
1351
        self.close_request(request)
 
1352
            
 
1353
    def process_request(self, request, address):
 
1354
        """Start a new process to process the request."""
 
1355
        multiprocessing.Process(target = self.sub_process_main,
 
1356
                                args = (request, address)).start()
 
1357
 
 
1358
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
 
1359
    """ adds a pipe to the MixIn """
900
1360
    def process_request(self, request, client_address):
901
1361
        """Overrides and wraps the original process_request().
902
1362
        
903
 
        This function creates a new pipe in self.pipe 
 
1363
        This function creates a new pipe in self.pipe
904
1364
        """
905
 
        self.pipe = os.pipe()
906
 
        super(ForkingMixInWithPipe,
 
1365
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
 
1366
 
 
1367
        super(MultiprocessingMixInWithPipe,
907
1368
              self).process_request(request, client_address)
908
 
        os.close(self.pipe[1])  # close write end
909
 
        self.add_pipe(self.pipe[0])
910
 
    def add_pipe(self, pipe):
 
1369
        self.child_pipe.close()
 
1370
        self.add_pipe(parent_pipe)
 
1371
 
 
1372
    def add_pipe(self, parent_pipe):
911
1373
        """Dummy function; override as necessary"""
912
 
        os.close(pipe)
913
 
 
914
 
 
915
 
class IPv6_TCPServer(ForkingMixInWithPipe,
 
1374
        pass
 
1375
 
 
1376
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
916
1377
                     socketserver.TCPServer, object):
917
1378
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
918
1379
    
982
1443
        clients:        set of Client objects
983
1444
        gnutls_priority GnuTLS priority string
984
1445
        use_dbus:       Boolean; to emit D-Bus signals or not
985
 
        clients:        set of Client objects
986
 
        gnutls_priority GnuTLS priority string
987
 
        use_dbus:       Boolean; to emit D-Bus signals or not
988
1446
    
989
1447
    Assumes a gobject.MainLoop event loop.
990
1448
    """
1006
1464
            return socketserver.TCPServer.server_activate(self)
1007
1465
    def enable(self):
1008
1466
        self.enabled = True
1009
 
    def add_pipe(self, pipe):
 
1467
    def add_pipe(self, parent_pipe):
1010
1468
        # Call "handle_ipc" for both data and EOF events
1011
 
        gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1012
 
                             self.handle_ipc)
1013
 
    def handle_ipc(self, source, condition, file_objects={}):
 
1469
        gobject.io_add_watch(parent_pipe.fileno(),
 
1470
                             gobject.IO_IN | gobject.IO_HUP,
 
1471
                             functools.partial(self.handle_ipc,
 
1472
                                               parent_pipe = parent_pipe))
 
1473
        
 
1474
    def handle_ipc(self, source, condition, parent_pipe=None,
 
1475
                   client_object=None):
1014
1476
        condition_names = {
1015
1477
            gobject.IO_IN: u"IN",   # There is data to read.
1016
1478
            gobject.IO_OUT: u"OUT", # Data can be written (without
1027
1489
                                       if cond & condition)
1028
1490
        logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1029
1491
                     conditions_string)
1030
 
        
1031
 
        # Turn the pipe file descriptor into a Python file object
1032
 
        if source not in file_objects:
1033
 
            file_objects[source] = os.fdopen(source, u"r", 1)
1034
 
        
1035
 
        # Read a line from the file object
1036
 
        cmdline = file_objects[source].readline()
1037
 
        if not cmdline:             # Empty line means end of file
1038
 
            # close the IPC pipe
1039
 
            file_objects[source].close()
1040
 
            del file_objects[source]
1041
 
            
1042
 
            # Stop calling this function
1043
 
            return False
1044
 
        
1045
 
        logger.debug(u"IPC command: %r", cmdline)
1046
 
        
1047
 
        # Parse and act on command
1048
 
        cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1049
 
        
1050
 
        if cmd == u"NOTFOUND":
1051
 
            logger.warning(u"Client not found for fingerprint: %s",
1052
 
                           args)
1053
 
            if self.use_dbus:
1054
 
                # Emit D-Bus signal
1055
 
                mandos_dbus_service.ClientNotFound(args)
1056
 
        elif cmd == u"INVALID":
1057
 
            for client in self.clients:
1058
 
                if client.name == args:
1059
 
                    logger.warning(u"Client %s is invalid", args)
1060
 
                    if self.use_dbus:
1061
 
                        # Emit D-Bus signal
1062
 
                        client.Rejected()
1063
 
                    break
1064
 
            else:
1065
 
                logger.error(u"Unknown client %s is invalid", args)
1066
 
        elif cmd == u"SENDING":
1067
 
            for client in self.clients:
1068
 
                if client.name == args:
1069
 
                    logger.info(u"Sending secret to %s", client.name)
1070
 
                    client.checked_ok()
1071
 
                    if self.use_dbus:
1072
 
                        # Emit D-Bus signal
1073
 
                        client.ReceivedSecret()
1074
 
                    break
1075
 
            else:
1076
 
                logger.error(u"Sending secret to unknown client %s",
1077
 
                             args)
1078
 
        else:
1079
 
            logger.error(u"Unknown IPC command: %r", cmdline)
1080
 
        
1081
 
        # Keep calling this function
 
1492
 
 
1493
        # error or the other end of multiprocessing.Pipe has closed
 
1494
        if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
 
1495
            return False
 
1496
        
 
1497
        # Read a request from the child
 
1498
        request = parent_pipe.recv()
 
1499
        logger.debug(u"IPC request: %s", repr(request))
 
1500
        command = request[0]
 
1501
        
 
1502
        if command == 'init':
 
1503
            fpr = request[1]
 
1504
            address = request[2]
 
1505
            
 
1506
            for c in self.clients:
 
1507
                if c.fingerprint == fpr:
 
1508
                    client = c
 
1509
                    break
 
1510
            else:
 
1511
                logger.warning(u"Client not found for fingerprint: %s, ad"
 
1512
                               u"dress: %s", fpr, address)
 
1513
                if self.use_dbus:
 
1514
                    # Emit D-Bus signal
 
1515
                    mandos_dbus_service.ClientNotFound(fpr, address)
 
1516
                parent_pipe.send(False)
 
1517
                return False
 
1518
            
 
1519
            gobject.io_add_watch(parent_pipe.fileno(),
 
1520
                                 gobject.IO_IN | gobject.IO_HUP,
 
1521
                                 functools.partial(self.handle_ipc,
 
1522
                                                   parent_pipe = parent_pipe,
 
1523
                                                   client_object = client))
 
1524
            parent_pipe.send(True)
 
1525
            # remove the old hook in favor of the new above hook on same fileno
 
1526
            return False
 
1527
        if command == 'funcall':
 
1528
            funcname = request[1]
 
1529
            args = request[2]
 
1530
            kwargs = request[3]
 
1531
            
 
1532
            parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
 
1533
 
 
1534
        if command == 'getattr':
 
1535
            attrname = request[1]
 
1536
            if callable(client_object.__getattribute__(attrname)):
 
1537
                parent_pipe.send(('function',))
 
1538
            else:
 
1539
                parent_pipe.send(('data', client_object.__getattribute__(attrname)))
 
1540
        
 
1541
        if command == 'setattr':
 
1542
            attrname = request[1]
 
1543
            value = request[2]
 
1544
            setattr(client_object, attrname, value)
 
1545
 
1082
1546
        return True
1083
1547
 
1084
1548
 
1114
1578
            elif suffix == u"w":
1115
1579
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1116
1580
            else:
1117
 
                raise ValueError
1118
 
        except (ValueError, IndexError):
1119
 
            raise ValueError
 
1581
                raise ValueError(u"Unknown suffix %r" % suffix)
 
1582
        except (ValueError, IndexError), e:
 
1583
            raise ValueError(e.message)
1120
1584
        timevalue += delta
1121
1585
    return timevalue
1122
1586
 
1135
1599
        def if_nametoindex(interface):
1136
1600
            "Get an interface index the hard way, i.e. using fcntl()"
1137
1601
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1138
 
            with closing(socket.socket()) as s:
 
1602
            with contextlib.closing(socket.socket()) as s:
1139
1603
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1140
1604
                                    struct.pack(str(u"16s16x"),
1141
1605
                                                interface))
1161
1625
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1162
1626
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1163
1627
            raise OSError(errno.ENODEV,
1164
 
                          u"/dev/null not a character device")
 
1628
                          u"%s not a character device"
 
1629
                          % os.path.devnull)
1165
1630
        os.dup2(null, sys.stdin.fileno())
1166
1631
        os.dup2(null, sys.stdout.fileno())
1167
1632
        os.dup2(null, sys.stderr.fileno())
1171
1636
 
1172
1637
def main():
1173
1638
    
1174
 
    ######################################################################
 
1639
    ##################################################################
1175
1640
    # Parsing of options, both command line and config file
1176
1641
    
1177
1642
    parser = optparse.OptionParser(version = "%%prog %s" % version)
1186
1651
    parser.add_option("--debug", action=u"store_true",
1187
1652
                      help=u"Debug mode; run in foreground and log to"
1188
1653
                      u" terminal")
 
1654
    parser.add_option("--debuglevel", type=u"string", metavar="Level",
 
1655
                      help=u"Debug level for stdout output")
1189
1656
    parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1190
1657
                      u" priority string (see GnuTLS documentation)")
1191
1658
    parser.add_option("--servicename", type=u"string",
1216
1683
                        u"servicename": u"Mandos",
1217
1684
                        u"use_dbus": u"True",
1218
1685
                        u"use_ipv6": u"True",
 
1686
                        u"debuglevel": u"",
1219
1687
                        }
1220
1688
    
1221
1689
    # Parse config file for server-global settings
1238
1706
    # options, if set.
1239
1707
    for option in (u"interface", u"address", u"port", u"debug",
1240
1708
                   u"priority", u"servicename", u"configdir",
1241
 
                   u"use_dbus", u"use_ipv6"):
 
1709
                   u"use_dbus", u"use_ipv6", u"debuglevel"):
1242
1710
        value = getattr(options, option)
1243
1711
        if value is not None:
1244
1712
            server_settings[option] = value
1253
1721
    
1254
1722
    # For convenience
1255
1723
    debug = server_settings[u"debug"]
 
1724
    debuglevel = server_settings[u"debuglevel"]
1256
1725
    use_dbus = server_settings[u"use_dbus"]
1257
1726
    use_ipv6 = server_settings[u"use_ipv6"]
1258
 
    
1259
 
    if not debug:
1260
 
        syslogger.setLevel(logging.WARNING)
1261
 
        console.setLevel(logging.WARNING)
1262
 
    
 
1727
 
1263
1728
    if server_settings[u"servicename"] != u"Mandos":
1264
1729
        syslogger.setFormatter(logging.Formatter
1265
1730
                               (u'Mandos (%s) [%%(process)d]:'
1271
1736
                        u"interval": u"5m",
1272
1737
                        u"checker": u"fping -q -- %%(host)s",
1273
1738
                        u"host": u"",
 
1739
                        u"approval_delay": u"0s",
 
1740
                        u"approval_duration": u"1s",
1274
1741
                        }
1275
1742
    client_config = configparser.SafeConfigParser(client_defaults)
1276
1743
    client_config.read(os.path.join(server_settings[u"configdir"],
1282
1749
    tcp_server = MandosServer((server_settings[u"address"],
1283
1750
                               server_settings[u"port"]),
1284
1751
                              ClientHandler,
1285
 
                              interface=server_settings[u"interface"],
 
1752
                              interface=(server_settings[u"interface"]
 
1753
                                         or None),
1286
1754
                              use_ipv6=use_ipv6,
1287
1755
                              gnutls_priority=
1288
1756
                              server_settings[u"priority"],
1314
1782
        if error[0] != errno.EPERM:
1315
1783
            raise error
1316
1784
    
1317
 
    # Enable all possible GnuTLS debugging
 
1785
    if not debug and not debuglevel:
 
1786
        syslogger.setLevel(logging.WARNING)
 
1787
        console.setLevel(logging.WARNING)
 
1788
    if debuglevel:
 
1789
        level = getattr(logging, debuglevel.upper())
 
1790
        syslogger.setLevel(level)
 
1791
        console.setLevel(level)
 
1792
 
1318
1793
    if debug:
 
1794
        # Enable all possible GnuTLS debugging
 
1795
        
1319
1796
        # "Use a log level over 10 to enable all debugging options."
1320
1797
        # - GnuTLS manual
1321
1798
        gnutls.library.functions.gnutls_global_set_log_level(11)
1326
1803
        
1327
1804
        (gnutls.library.functions
1328
1805
         .gnutls_global_set_log_function(debug_gnutls))
 
1806
        
 
1807
        # Redirect stdin so all checkers get /dev/null
 
1808
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
1809
        os.dup2(null, sys.stdin.fileno())
 
1810
        if null > 2:
 
1811
            os.close(null)
 
1812
    else:
 
1813
        # No console logging
 
1814
        logger.removeHandler(console)
 
1815
    
1329
1816
    
1330
1817
    global main_loop
1331
1818
    # From the Avahi example code
1334
1821
    bus = dbus.SystemBus()
1335
1822
    # End of Avahi example code
1336
1823
    if use_dbus:
1337
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
 
1824
        try:
 
1825
            bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
 
1826
                                            bus, do_not_queue=True)
 
1827
        except dbus.exceptions.NameExistsException, e:
 
1828
            logger.error(unicode(e) + u", disabling D-Bus")
 
1829
            use_dbus = False
 
1830
            server_settings[u"use_dbus"] = False
 
1831
            tcp_server.use_dbus = False
1338
1832
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1339
1833
    service = AvahiService(name = server_settings[u"servicename"],
1340
1834
                           servicetype = u"_mandos._tcp",
1342
1836
    if server_settings["interface"]:
1343
1837
        service.interface = (if_nametoindex
1344
1838
                             (str(server_settings[u"interface"])))
 
1839
 
 
1840
    if not debug:
 
1841
        # Close all input and output, do double fork, etc.
 
1842
        daemon()
 
1843
        
 
1844
    global multiprocessing_manager
 
1845
    multiprocessing_manager = multiprocessing.Manager()
1345
1846
    
1346
1847
    client_class = Client
1347
1848
    if use_dbus:
1348
1849
        client_class = functools.partial(ClientDBus, bus = bus)
 
1850
    def client_config_items(config, section):
 
1851
        special_settings = {
 
1852
            "approved_by_default":
 
1853
                lambda: config.getboolean(section,
 
1854
                                          "approved_by_default"),
 
1855
            }
 
1856
        for name, value in config.items(section):
 
1857
            try:
 
1858
                yield (name, special_settings[name]())
 
1859
            except KeyError:
 
1860
                yield (name, value)
 
1861
    
1349
1862
    tcp_server.clients.update(set(
1350
1863
            client_class(name = section,
1351
 
                         config= dict(client_config.items(section)))
 
1864
                         config= dict(client_config_items(
 
1865
                        client_config, section)))
1352
1866
            for section in client_config.sections()))
1353
1867
    if not tcp_server.clients:
1354
1868
        logger.warning(u"No clients defined")
1355
 
    
1356
 
    if debug:
1357
 
        # Redirect stdin so all checkers get /dev/null
1358
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1359
 
        os.dup2(null, sys.stdin.fileno())
1360
 
        if null > 2:
1361
 
            os.close(null)
1362
 
    else:
1363
 
        # No console logging
1364
 
        logger.removeHandler(console)
1365
 
        # Close all input and output, do double fork, etc.
1366
 
        daemon()
1367
 
    
 
1869
        
1368
1870
    try:
1369
 
        with closing(pidfile):
 
1871
        with pidfile:
1370
1872
            pid = os.getpid()
1371
1873
            pidfile.write(str(pid) + "\n")
1372
1874
        del pidfile
1378
1880
        pass
1379
1881
    del pidfilename
1380
1882
    
1381
 
    def cleanup():
1382
 
        "Cleanup function; run on exit"
1383
 
        service.cleanup()
1384
 
        
1385
 
        while tcp_server.clients:
1386
 
            client = tcp_server.clients.pop()
1387
 
            client.disable_hook = None
1388
 
            client.disable()
1389
 
    
1390
 
    atexit.register(cleanup)
1391
 
    
1392
1883
    if not debug:
1393
1884
        signal.signal(signal.SIGINT, signal.SIG_IGN)
1394
1885
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1401
1892
                dbus.service.Object.__init__(self, bus, u"/")
1402
1893
            _interface = u"se.bsnet.fukt.Mandos"
1403
1894
            
1404
 
            @dbus.service.signal(_interface, signature=u"oa{sv}")
1405
 
            def ClientAdded(self, objpath, properties):
 
1895
            @dbus.service.signal(_interface, signature=u"o")
 
1896
            def ClientAdded(self, objpath):
1406
1897
                "D-Bus signal"
1407
1898
                pass
1408
1899
            
1409
 
            @dbus.service.signal(_interface, signature=u"s")
1410
 
            def ClientNotFound(self, fingerprint):
 
1900
            @dbus.service.signal(_interface, signature=u"ss")
 
1901
            def ClientNotFound(self, fingerprint, address):
1411
1902
                "D-Bus signal"
1412
1903
                pass
1413
1904
            
1427
1918
            def GetAllClientsWithProperties(self):
1428
1919
                "D-Bus method"
1429
1920
                return dbus.Dictionary(
1430
 
                    ((c.dbus_object_path, c.GetAllProperties())
 
1921
                    ((c.dbus_object_path, c.GetAll(u""))
1431
1922
                     for c in tcp_server.clients),
1432
1923
                    signature=u"oa{sv}")
1433
1924
            
1439
1930
                        tcp_server.clients.remove(c)
1440
1931
                        c.remove_from_connection()
1441
1932
                        # Don't signal anything except ClientRemoved
1442
 
                        c.disable(signal=False)
 
1933
                        c.disable(quiet=True)
1443
1934
                        # Emit D-Bus signal
1444
1935
                        self.ClientRemoved(object_path, c.name)
1445
1936
                        return
1446
 
                raise KeyError
 
1937
                raise KeyError(object_path)
1447
1938
            
1448
1939
            del _interface
1449
1940
        
1450
1941
        mandos_dbus_service = MandosDBusService()
1451
1942
    
 
1943
    def cleanup():
 
1944
        "Cleanup function; run on exit"
 
1945
        service.cleanup()
 
1946
        
 
1947
        while tcp_server.clients:
 
1948
            client = tcp_server.clients.pop()
 
1949
            if use_dbus:
 
1950
                client.remove_from_connection()
 
1951
            client.disable_hook = None
 
1952
            # Don't signal anything except ClientRemoved
 
1953
            client.disable(quiet=True)
 
1954
            if use_dbus:
 
1955
                # Emit D-Bus signal
 
1956
                mandos_dbus_service.ClientRemoved(client.dbus_object_path,
 
1957
                                                  client.name)
 
1958
    
 
1959
    atexit.register(cleanup)
 
1960
    
1452
1961
    for client in tcp_server.clients:
1453
1962
        if use_dbus:
1454
1963
            # Emit D-Bus signal
1455
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path,
1456
 
                                            client.GetAllProperties())
 
1964
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
1457
1965
        client.enable()
1458
1966
    
1459
1967
    tcp_server.enable()
1477
1985
            service.activate()
1478
1986
        except dbus.exceptions.DBusException, error:
1479
1987
            logger.critical(u"DBusException: %s", error)
 
1988
            cleanup()
1480
1989
            sys.exit(1)
1481
1990
        # End of Avahi example code
1482
1991
        
1489
1998
        main_loop.run()
1490
1999
    except AvahiError, error:
1491
2000
        logger.critical(u"AvahiError: %s", error)
 
2001
        cleanup()
1492
2002
        sys.exit(1)
1493
2003
    except KeyboardInterrupt:
1494
2004
        if debug:
1495
2005
            print >> sys.stderr
1496
2006
        logger.debug(u"Server received KeyboardInterrupt")
1497
2007
    logger.debug(u"Server exiting")
 
2008
    # Must run before the D-Bus bus name gets deregistered
 
2009
    cleanup()
1498
2010
 
1499
2011
if __name__ == '__main__':
1500
2012
    main()