/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2009-11-19 18:31:28 UTC
  • Revision ID: teddy@fukt.bsnet.se-20091119183128-ttstewh61xmtnil1
* Makefile (LINK_FORTIFY_LD): Bug fix: removed "-fPIE".
* mandos-keygen: Bug fix: Fix quoting for the "--password" option.

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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
83
81
 
84
82
version = "1.0.14"
85
83
 
86
 
#logger = logging.getLogger(u'mandos')
87
84
logger = logging.Logger(u'mandos')
88
85
syslogger = (logging.handlers.SysLogHandler
89
86
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
157
154
                            u" after %i retries, exiting.",
158
155
                            self.rename_count)
159
156
            raise AvahiServiceError(u"Too many renames")
160
 
        self.name = unicode(self.server.GetAlternativeServiceName(self.name))
 
157
        self.name = self.server.GetAlternativeServiceName(self.name)
161
158
        logger.info(u"Changing Zeroconf service name to %r ...",
162
 
                    self.name)
 
159
                    unicode(self.name))
163
160
        syslogger.setFormatter(logging.Formatter
164
161
                               (u'Mandos (%s) [%%(process)d]:'
165
162
                                u' %%(levelname)s: %%(message)s'
245
242
    enabled:    bool()
246
243
    last_checked_ok: datetime.datetime(); (UTC) or None
247
244
    timeout:    datetime.timedelta(); How long from last_checked_ok
248
 
                                      until this client is disabled
 
245
                                      until this client is invalid
249
246
    interval:   datetime.timedelta(); How often to start a new checker
250
247
    disable_hook:  If set, called by disable() as disable_hook(self)
251
248
    checker:    subprocess.Popen(); a running checker process used
259
256
                     runtime with vars(self) as dict, so that for
260
257
                     instance %(name)s can be used in the command.
261
258
    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
259
    """
266
260
    
267
261
    @staticmethod
278
272
    def interval_milliseconds(self):
279
273
        "Return the 'interval' attribute in milliseconds"
280
274
        return self._timedelta_to_milliseconds(self.interval)
281
 
 
282
 
    def approved_delay_milliseconds(self):
283
 
        return self._timedelta_to_milliseconds(self.approved_delay)
284
275
    
285
276
    def __init__(self, name = None, disable_hook=None, config=None):
286
277
        """Note: the 'checker' key in 'config' sets the
299
290
        if u"secret" in config:
300
291
            self.secret = config[u"secret"].decode(u"base64")
301
292
        elif u"secfile" in config:
302
 
            with open(os.path.expanduser(os.path.expandvars
303
 
                                         (config[u"secfile"])),
304
 
                      "rb") as secfile:
 
293
            with closing(open(os.path.expanduser
 
294
                              (os.path.expandvars
 
295
                               (config[u"secfile"])),
 
296
                              "rb")) as secfile:
305
297
                self.secret = secfile.read()
306
298
        else:
307
299
            raise TypeError(u"No secret or secfile for client %s"
321
313
        self.checker_command = config[u"checker"]
322
314
        self.current_checker_command = None
323
315
        self.last_connect = None
324
 
        self._approved = None
325
 
        self.approved_by_default = config.get(u"approved_by_default",
326
 
                                              True)
327
 
        self.approvals_pending = 0
328
 
        self.approved_delay = string_to_delta(
329
 
            config[u"approved_delay"])
330
 
        self.approved_duration = string_to_delta(
331
 
            config[u"approved_duration"])
332
 
        self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
333
316
    
334
 
    def send_changedstate(self):
335
 
        self.changedstate.acquire()
336
 
        self.changedstate.notify_all()
337
 
        self.changedstate.release()
338
 
        
339
317
    def enable(self):
340
318
        """Start this client's checker and timeout hooks"""
341
319
        if getattr(self, u"enabled", False):
342
320
            # Already enabled
343
321
            return
344
 
        self.send_changedstate()
345
322
        self.last_enabled = datetime.datetime.utcnow()
346
323
        # Schedule a new checker to be started an 'interval' from now,
347
324
        # and every interval from then on.
361
338
        if not getattr(self, "enabled", False):
362
339
            return False
363
340
        if not quiet:
364
 
            self.send_changedstate()
365
 
        if not quiet:
366
341
            logger.info(u"Disabling client %s", self.name)
367
342
        if getattr(self, u"disable_initiator_tag", False):
368
343
            gobject.source_remove(self.disable_initiator_tag)
421
396
        # client would inevitably timeout, since no checker would get
422
397
        # a chance to run to completion.  If we instead leave running
423
398
        # checkers alone, the checker would have to take more time
424
 
        # than 'timeout' for the client to be disabled, which is as it
425
 
        # should be.
 
399
        # than 'timeout' for the client to be declared invalid, which
 
400
        # is as it should be.
426
401
        
427
402
        # If a checker exists, make sure it is not a zombie
428
403
        try:
500
475
            if error.errno != errno.ESRCH: # No such process
501
476
                raise
502
477
        self.checker = None
 
478
    
 
479
    def still_valid(self):
 
480
        """Has the timeout not yet passed for this client?"""
 
481
        if not getattr(self, u"enabled", False):
 
482
            return False
 
483
        now = datetime.datetime.utcnow()
 
484
        if self.last_checked_ok is None:
 
485
            return now < (self.created + self.timeout)
 
486
        else:
 
487
            return now < (self.last_checked_ok + self.timeout)
 
488
 
503
489
 
504
490
def dbus_service_property(dbus_interface, signature=u"v",
505
491
                          access=u"readwrite", byte_arrays=False):
513
499
    dbus.service.method, except there is only "signature", since the
514
500
    type from Get() and the type sent to Set() is the same.
515
501
    """
516
 
    # Encoding deeply encoded byte arrays is not supported yet by the
517
 
    # "Set" method, so we fail early here:
518
 
    if byte_arrays and signature != u"ay":
519
 
        raise ValueError(u"Byte arrays not supported for non-'ay'"
520
 
                         u" signature %r" % signature)
521
502
    def decorator(func):
522
503
        func._dbus_is_property = True
523
504
        func._dbus_interface = dbus_interface
609
590
        if prop._dbus_access == u"read":
610
591
            raise DBusPropertyAccessException(property_name)
611
592
        if prop._dbus_get_args_options[u"byte_arrays"]:
612
 
            # The byte_arrays option is not supported yet on
613
 
            # signatures other than "ay".
614
 
            if prop._dbus_signature != u"ay":
615
 
                raise ValueError
616
593
            value = dbus.ByteArray(''.join(unichr(byte)
617
594
                                           for byte in value))
618
595
        prop(value)
700
677
    # dbus.service.Object doesn't use super(), so we can't either.
701
678
    
702
679
    def __init__(self, bus = None, *args, **kwargs):
703
 
        self._approvals_pending = 0
704
680
        self.bus = bus
705
681
        Client.__init__(self, *args, **kwargs)
706
682
        # Only now, when this client is initialized, can it show up on
710
686
                                  + self.name.replace(u".", u"_")))
711
687
        DBusObjectWithProperties.__init__(self, self.bus,
712
688
                                          self.dbus_object_path)
713
 
 
714
 
    def _get_approvals_pending(self):
715
 
        return self._approvals_pending
716
 
    def _set_approvals_pending(self, value):
717
 
        old_value = self._approvals_pending
718
 
        self._approvals_pending = value
719
 
        bval = bool(value)
720
 
        if (hasattr(self, "dbus_object_path")
721
 
            and bval is not bool(old_value)):
722
 
            dbus_bool = dbus.Boolean(bval, variant_level=1)
723
 
            self.PropertyChanged(dbus.String(u"approved_pending"),
724
 
                                 dbus_bool)
725
 
 
726
 
    approvals_pending = property(_get_approvals_pending,
727
 
                                 _set_approvals_pending)
728
 
    del _get_approvals_pending, _set_approvals_pending
729
689
    
730
690
    @staticmethod
731
691
    def _datetime_to_dbus(dt, variant_level=0):
820
780
            self.PropertyChanged(dbus.String(u"checker_running"),
821
781
                                 dbus.Boolean(False, variant_level=1))
822
782
        return r
823
 
 
824
 
    def _reset_approved(self):
825
 
        self._approved = None
826
 
        return False
827
 
    
828
 
    def approve(self, value=True):
829
 
        self.send_changedstate()
830
 
        self._approved = value
831
 
        gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration),
832
 
                            self._reset_approved)
833
 
    
834
 
    
835
 
    ## D-Bus methods, signals & properties
 
783
    
 
784
    ## D-Bus methods & signals
836
785
    _interface = u"se.bsnet.fukt.Mandos.Client"
837
786
    
838
 
    ## Signals
 
787
    # CheckedOK - method
 
788
    @dbus.service.method(_interface)
 
789
    def CheckedOK(self):
 
790
        return self.checked_ok()
839
791
    
840
792
    # CheckerCompleted - signal
841
793
    @dbus.service.signal(_interface, signature=u"nxs")
858
810
    # GotSecret - signal
859
811
    @dbus.service.signal(_interface)
860
812
    def GotSecret(self):
861
 
        """D-Bus signal
862
 
        Is sent after a successful transfer of secret from the Mandos
863
 
        server to mandos-client
864
 
        """
 
813
        "D-Bus signal"
865
814
        pass
866
815
    
867
816
    # Rejected - signal
868
 
    @dbus.service.signal(_interface, signature=u"s")
869
 
    def Rejected(self, reason):
870
 
        "D-Bus signal"
871
 
        pass
872
 
    
873
 
    # NeedApproval - signal
874
 
    @dbus.service.signal(_interface, signature=u"db")
875
 
    def NeedApproval(self, timeout, default):
876
 
        "D-Bus signal"
877
 
        pass
878
 
    
879
 
    ## Methods
880
 
 
881
 
    # Approve - method
882
 
    @dbus.service.method(_interface, in_signature=u"b")
883
 
    def Approve(self, value):
884
 
        self.approve(value)
885
 
 
886
 
    # CheckedOK - method
887
 
    @dbus.service.method(_interface)
888
 
    def CheckedOK(self):
889
 
        return self.checked_ok()
 
817
    @dbus.service.signal(_interface)
 
818
    def Rejected(self):
 
819
        "D-Bus signal"
 
820
        pass
890
821
    
891
822
    # Enable - method
892
823
    @dbus.service.method(_interface)
911
842
    def StopChecker(self):
912
843
        self.stop_checker()
913
844
    
914
 
    ## Properties
915
 
    
916
 
    # approved_pending - property
917
 
    @dbus_service_property(_interface, signature=u"b", access=u"read")
918
 
    def approved_pending_dbus_property(self):
919
 
        return dbus.Boolean(bool(self.approvals_pending))
920
 
    
921
 
    # approved_by_default - property
922
 
    @dbus_service_property(_interface, signature=u"b",
923
 
                           access=u"readwrite")
924
 
    def approved_by_default_dbus_property(self):
925
 
        return dbus.Boolean(self.approved_by_default)
926
 
    
927
 
    # approved_delay - property
928
 
    @dbus_service_property(_interface, signature=u"t",
929
 
                           access=u"readwrite")
930
 
    def approved_delay_dbus_property(self):
931
 
        return dbus.UInt64(self.approved_delay_milliseconds())
932
 
    
933
 
    # approved_duration - property
934
 
    @dbus_service_property(_interface, signature=u"t",
935
 
                           access=u"readwrite")
936
 
    def approved_duration_dbus_property(self):
937
 
        return dbus.UInt64(self._timedelta_to_milliseconds(
938
 
                self.approved_duration))
939
 
    
940
845
    # name - property
941
846
    @dbus_service_property(_interface, signature=u"s", access=u"read")
942
847
    def name_dbus_property(self):
1076
981
    del _interface
1077
982
 
1078
983
 
1079
 
class ProxyClient(object):
1080
 
    def __init__(self, child_pipe, fpr, address):
1081
 
        self._pipe = child_pipe
1082
 
        self._pipe.send(('init', fpr, address))
1083
 
        if not self._pipe.recv():
1084
 
            raise KeyError()
1085
 
 
1086
 
    def __getattribute__(self, name):
1087
 
        if(name == '_pipe'):
1088
 
            return super(ProxyClient, self).__getattribute__(name)
1089
 
        self._pipe.send(('getattr', name))
1090
 
        data = self._pipe.recv()
1091
 
        if data[0] == 'data':
1092
 
            return data[1]
1093
 
        if data[0] == 'function':
1094
 
            def func(*args, **kwargs):
1095
 
                self._pipe.send(('funcall', name, args, kwargs))
1096
 
                return self._pipe.recv()[1]
1097
 
            return func
1098
 
 
1099
 
    def __setattr__(self, name, value):
1100
 
        if(name == '_pipe'):
1101
 
            return super(ProxyClient, self).__setattr__(name, value)
1102
 
        self._pipe.send(('setattr', name, value))
1103
 
 
1104
 
 
1105
984
class ClientHandler(socketserver.BaseRequestHandler, object):
1106
985
    """A class to handle client connections.
1107
986
    
1109
988
    Note: This will run in its own forked process."""
1110
989
    
1111
990
    def handle(self):
1112
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1113
 
            logger.info(u"TCP connection from: %s",
1114
 
                        unicode(self.client_address))
1115
 
            logger.debug(u"Pipe FD: %d",
1116
 
                         self.server.child_pipe.fileno())
1117
 
 
 
991
        logger.info(u"TCP connection from: %s",
 
992
                    unicode(self.client_address))
 
993
        logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
 
994
        # Open IPC pipe to parent process
 
995
        with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1118
996
            session = (gnutls.connection
1119
997
                       .ClientSession(self.request,
1120
998
                                      gnutls.connection
1121
999
                                      .X509Credentials()))
1122
 
 
 
1000
            
 
1001
            line = self.request.makefile().readline()
 
1002
            logger.debug(u"Protocol version: %r", line)
 
1003
            try:
 
1004
                if int(line.strip().split()[0]) > 1:
 
1005
                    raise RuntimeError
 
1006
            except (ValueError, IndexError, RuntimeError), error:
 
1007
                logger.error(u"Unknown protocol version: %s", error)
 
1008
                return
 
1009
            
1123
1010
            # Note: gnutls.connection.X509Credentials is really a
1124
1011
            # generic GnuTLS certificate credentials object so long as
1125
1012
            # no X.509 keys are added to it.  Therefore, we can use it
1126
1013
            # here despite using OpenPGP certificates.
1127
 
 
 
1014
            
1128
1015
            #priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1129
1016
            #                      u"+AES-256-CBC", u"+SHA1",
1130
1017
            #                      u"+COMP-NULL", u"+CTYPE-OPENPGP",
1136
1023
            (gnutls.library.functions
1137
1024
             .gnutls_priority_set_direct(session._c_object,
1138
1025
                                         priority, None))
1139
 
 
1140
 
            # Start communication using the Mandos protocol
1141
 
            # Get protocol number
1142
 
            line = self.request.makefile().readline()
1143
 
            logger.debug(u"Protocol version: %r", line)
1144
 
            try:
1145
 
                if int(line.strip().split()[0]) > 1:
1146
 
                    raise RuntimeError
1147
 
            except (ValueError, IndexError, RuntimeError), error:
1148
 
                logger.error(u"Unknown protocol version: %s", error)
1149
 
                return
1150
 
 
1151
 
            # Start GnuTLS connection
 
1026
            
1152
1027
            try:
1153
1028
                session.handshake()
1154
1029
            except gnutls.errors.GNUTLSError, error:
1157
1032
                # established.  Just abandon the request.
1158
1033
                return
1159
1034
            logger.debug(u"Handshake succeeded")
1160
 
 
1161
 
            approval_required = False
1162
1035
            try:
1163
 
                try:
1164
 
                    fpr = self.fingerprint(self.peer_certificate
1165
 
                                           (session))
1166
 
                except (TypeError, gnutls.errors.GNUTLSError), error:
1167
 
                    logger.warning(u"Bad certificate: %s", error)
1168
 
                    return
1169
 
                logger.debug(u"Fingerprint: %s", fpr)
1170
 
 
1171
 
                try:
1172
 
                    client = ProxyClient(child_pipe, fpr,
1173
 
                                         self.client_address)
1174
 
                except KeyError:
1175
 
                    return
1176
 
                
1177
 
                if client.approved_delay:
1178
 
                    delay = client.approved_delay
1179
 
                    client.approvals_pending += 1
1180
 
                    approval_required = True
1181
 
                
1182
 
                while True:
1183
 
                    if not client.enabled:
1184
 
                        logger.warning(u"Client %s is disabled",
1185
 
                                       client.name)
1186
 
                        if self.server.use_dbus:
1187
 
                            # Emit D-Bus signal
1188
 
                            client.Rejected("Disabled")                    
1189
 
                        return
1190
 
                    
1191
 
                    if client._approved or not client.approved_delay:
1192
 
                        #We are approved or approval is disabled
1193
 
                        break
1194
 
                    elif client._approved is None:
1195
 
                        logger.info(u"Client %s need approval",
1196
 
                                    client.name)
1197
 
                        if self.server.use_dbus:
1198
 
                            # Emit D-Bus signal
1199
 
                            client.NeedApproval(
1200
 
                                client.approved_delay_milliseconds(),
1201
 
                                client.approved_by_default)
1202
 
                    else:
1203
 
                        logger.warning(u"Client %s was not approved",
1204
 
                                       client.name)
1205
 
                        if self.server.use_dbus:
1206
 
                            # Emit D-Bus signal
1207
 
                            client.Rejected("Disapproved")
1208
 
                        return
1209
 
                    
1210
 
                    #wait until timeout or approved
1211
 
                    #x = float(client._timedelta_to_milliseconds(delay))
1212
 
                    time = datetime.datetime.now()
1213
 
                    client.changedstate.acquire()
1214
 
                    client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1215
 
                    client.changedstate.release()
1216
 
                    time2 = datetime.datetime.now()
1217
 
                    if (time2 - time) >= delay:
1218
 
                        if not client.approved_by_default:
1219
 
                            logger.warning("Client %s timed out while"
1220
 
                                           " waiting for approval",
1221
 
                                           client.name)
1222
 
                            if self.server.use_dbus:
1223
 
                                # Emit D-Bus signal
1224
 
                                client.Rejected("Time out")
1225
 
                            return
1226
 
                        else:
1227
 
                            break
1228
 
                    else:
1229
 
                        delay -= time2 - time
1230
 
                
1231
 
                sent_size = 0
1232
 
                while sent_size < len(client.secret):
1233
 
                    try:
1234
 
                        sent = session.send(client.secret[sent_size:])
1235
 
                    except (gnutls.errors.GNUTLSError), error:
1236
 
                        logger.warning("gnutls send failed")
1237
 
                        return
1238
 
                    logger.debug(u"Sent: %d, remaining: %d",
1239
 
                                 sent, len(client.secret)
1240
 
                                 - (sent_size + sent))
1241
 
                    sent_size += sent
1242
 
 
1243
 
                logger.info(u"Sending secret to %s", client.name)
1244
 
                # bump the timeout as if seen
1245
 
                client.checked_ok()
1246
 
                if self.server.use_dbus:
1247
 
                    # Emit D-Bus signal
1248
 
                    client.GotSecret()
 
1036
                fpr = self.fingerprint(self.peer_certificate(session))
 
1037
            except (TypeError, gnutls.errors.GNUTLSError), error:
 
1038
                logger.warning(u"Bad certificate: %s", error)
 
1039
                session.bye()
 
1040
                return
 
1041
            logger.debug(u"Fingerprint: %s", fpr)
1249
1042
            
1250
 
            finally:
1251
 
                if approval_required:
1252
 
                    client.approvals_pending -= 1
1253
 
                try:
1254
 
                    session.bye()
1255
 
                except (gnutls.errors.GNUTLSError), error:
1256
 
                    logger.warning("gnutls bye failed")
 
1043
            for c in self.server.clients:
 
1044
                if c.fingerprint == fpr:
 
1045
                    client = c
 
1046
                    break
 
1047
            else:
 
1048
                ipc.write(u"NOTFOUND %s %s\n"
 
1049
                          % (fpr, unicode(self.client_address)))
 
1050
                session.bye()
 
1051
                return
 
1052
            # Have to check if client.still_valid(), since it is
 
1053
            # possible that the client timed out while establishing
 
1054
            # the GnuTLS session.
 
1055
            if not client.still_valid():
 
1056
                ipc.write(u"INVALID %s\n" % client.name)
 
1057
                session.bye()
 
1058
                return
 
1059
            ipc.write(u"SENDING %s\n" % client.name)
 
1060
            sent_size = 0
 
1061
            while sent_size < len(client.secret):
 
1062
                sent = session.send(client.secret[sent_size:])
 
1063
                logger.debug(u"Sent: %d, remaining: %d",
 
1064
                             sent, len(client.secret)
 
1065
                             - (sent_size + sent))
 
1066
                sent_size += sent
 
1067
            session.bye()
1257
1068
    
1258
1069
    @staticmethod
1259
1070
    def peer_certificate(session):
1319
1130
        return hex_fpr
1320
1131
 
1321
1132
 
1322
 
class MultiprocessingMixIn(object):
1323
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1324
 
    def sub_process_main(self, request, address):
1325
 
        try:
1326
 
            self.finish_request(request, address)
1327
 
        except:
1328
 
            self.handle_error(request, address)
1329
 
        self.close_request(request)
1330
 
            
1331
 
    def process_request(self, request, address):
1332
 
        """Start a new process to process the request."""
1333
 
        multiprocessing.Process(target = self.sub_process_main,
1334
 
                                args = (request, address)).start()
1335
 
 
1336
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1337
 
    """ adds a pipe to the MixIn """
 
1133
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
 
1134
    """Like socketserver.ForkingMixIn, but also pass a pipe."""
1338
1135
    def process_request(self, request, client_address):
1339
1136
        """Overrides and wraps the original process_request().
1340
1137
        
1341
1138
        This function creates a new pipe in self.pipe
1342
1139
        """
1343
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1344
 
 
1345
 
        super(MultiprocessingMixInWithPipe,
 
1140
        self.pipe = os.pipe()
 
1141
        super(ForkingMixInWithPipe,
1346
1142
              self).process_request(request, client_address)
1347
 
        self.child_pipe.close()
1348
 
        self.add_pipe(parent_pipe)
1349
 
 
1350
 
    def add_pipe(self, parent_pipe):
 
1143
        os.close(self.pipe[1])  # close write end
 
1144
        self.add_pipe(self.pipe[0])
 
1145
    def add_pipe(self, pipe):
1351
1146
        """Dummy function; override as necessary"""
1352
 
        pass
1353
 
 
1354
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
 
1147
        os.close(pipe)
 
1148
 
 
1149
 
 
1150
class IPv6_TCPServer(ForkingMixInWithPipe,
1355
1151
                     socketserver.TCPServer, object):
1356
1152
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1357
1153
    
1442
1238
            return socketserver.TCPServer.server_activate(self)
1443
1239
    def enable(self):
1444
1240
        self.enabled = True
1445
 
    def add_pipe(self, parent_pipe):
 
1241
    def add_pipe(self, pipe):
1446
1242
        # Call "handle_ipc" for both data and EOF events
1447
 
        gobject.io_add_watch(parent_pipe.fileno(),
1448
 
                             gobject.IO_IN | gobject.IO_HUP,
1449
 
                             functools.partial(self.handle_ipc,
1450
 
                                               parent_pipe = parent_pipe))
1451
 
        
1452
 
    def handle_ipc(self, source, condition, parent_pipe=None,
1453
 
                   client_object=None):
 
1243
        gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
 
1244
                             self.handle_ipc)
 
1245
    def handle_ipc(self, source, condition, file_objects={}):
1454
1246
        condition_names = {
1455
1247
            gobject.IO_IN: u"IN",   # There is data to read.
1456
1248
            gobject.IO_OUT: u"OUT", # Data can be written (without
1467
1259
                                       if cond & condition)
1468
1260
        logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1469
1261
                     conditions_string)
1470
 
 
1471
 
        # error or the other end of multiprocessing.Pipe has closed
1472
 
        if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1473
 
            return False
1474
 
        
1475
 
        # Read a request from the child
1476
 
        request = parent_pipe.recv()
1477
 
        logger.debug(u"IPC request: %s", repr(request))
1478
 
        command = request[0]
1479
 
        
1480
 
        if command == 'init':
1481
 
            fpr = request[1]
1482
 
            address = request[2]
1483
 
            
1484
 
            for c in self.clients:
1485
 
                if c.fingerprint == fpr:
1486
 
                    client = c
1487
 
                    break
1488
 
            else:
1489
 
                logger.warning(u"Client not found for fingerprint: %s, ad"
1490
 
                               u"dress: %s", fpr, address)
1491
 
                if self.use_dbus:
1492
 
                    # Emit D-Bus signal
1493
 
                    mandos_dbus_service.ClientNotFound(fpr, address)
1494
 
                parent_pipe.send(False)
1495
 
                return False
1496
 
            
1497
 
            gobject.io_add_watch(parent_pipe.fileno(),
1498
 
                                 gobject.IO_IN | gobject.IO_HUP,
1499
 
                                 functools.partial(self.handle_ipc,
1500
 
                                                   parent_pipe = parent_pipe,
1501
 
                                                   client_object = client))
1502
 
            parent_pipe.send(True)
1503
 
            # remove the old hook in favor of the new above hook on same fileno
1504
 
            return False
1505
 
        if command == 'funcall':
1506
 
            funcname = request[1]
1507
 
            args = request[2]
1508
 
            kwargs = request[3]
1509
 
            
1510
 
            parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1511
 
 
1512
 
        if command == 'getattr':
1513
 
            attrname = request[1]
1514
 
            if callable(client_object.__getattribute__(attrname)):
1515
 
                parent_pipe.send(('function',))
1516
 
            else:
1517
 
                parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1518
 
        
1519
 
        if command == 'setattr':
1520
 
            attrname = request[1]
1521
 
            value = request[2]
1522
 
            setattr(client_object, attrname, value)
1523
 
 
 
1262
        
 
1263
        # Turn the pipe file descriptor into a Python file object
 
1264
        if source not in file_objects:
 
1265
            file_objects[source] = os.fdopen(source, u"r", 1)
 
1266
        
 
1267
        # Read a line from the file object
 
1268
        cmdline = file_objects[source].readline()
 
1269
        if not cmdline:             # Empty line means end of file
 
1270
            # close the IPC pipe
 
1271
            file_objects[source].close()
 
1272
            del file_objects[source]
 
1273
            
 
1274
            # Stop calling this function
 
1275
            return False
 
1276
        
 
1277
        logger.debug(u"IPC command: %r", cmdline)
 
1278
        
 
1279
        # Parse and act on command
 
1280
        cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
 
1281
        
 
1282
        if cmd == u"NOTFOUND":
 
1283
            fpr, address = args.split(None, 1)
 
1284
            logger.warning(u"Client not found for fingerprint: %s, ad"
 
1285
                           u"dress: %s", fpr, address)
 
1286
            if self.use_dbus:
 
1287
                # Emit D-Bus signal
 
1288
                mandos_dbus_service.ClientNotFound(fpr, address)
 
1289
        elif cmd == u"INVALID":
 
1290
            for client in self.clients:
 
1291
                if client.name == args:
 
1292
                    logger.warning(u"Client %s is invalid", args)
 
1293
                    if self.use_dbus:
 
1294
                        # Emit D-Bus signal
 
1295
                        client.Rejected()
 
1296
                    break
 
1297
            else:
 
1298
                logger.error(u"Unknown client %s is invalid", args)
 
1299
        elif cmd == u"SENDING":
 
1300
            for client in self.clients:
 
1301
                if client.name == args:
 
1302
                    logger.info(u"Sending secret to %s", client.name)
 
1303
                    client.checked_ok()
 
1304
                    if self.use_dbus:
 
1305
                        # Emit D-Bus signal
 
1306
                        client.GotSecret()
 
1307
                    break
 
1308
            else:
 
1309
                logger.error(u"Sending secret to unknown client %s",
 
1310
                             args)
 
1311
        else:
 
1312
            logger.error(u"Unknown IPC command: %r", cmdline)
 
1313
        
 
1314
        # Keep calling this function
1524
1315
        return True
1525
1316
 
1526
1317
 
1577
1368
        def if_nametoindex(interface):
1578
1369
            "Get an interface index the hard way, i.e. using fcntl()"
1579
1370
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1580
 
            with contextlib.closing(socket.socket()) as s:
 
1371
            with closing(socket.socket()) as s:
1581
1372
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1582
1373
                                    struct.pack(str(u"16s16x"),
1583
1374
                                                interface))
1629
1420
    parser.add_option("--debug", action=u"store_true",
1630
1421
                      help=u"Debug mode; run in foreground and log to"
1631
1422
                      u" terminal")
1632
 
    parser.add_option("--debuglevel", type=u"string", metavar="Level",
1633
 
                      help=u"Debug level for stdout output")
1634
1423
    parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1635
1424
                      u" priority string (see GnuTLS documentation)")
1636
1425
    parser.add_option("--servicename", type=u"string",
1661
1450
                        u"servicename": u"Mandos",
1662
1451
                        u"use_dbus": u"True",
1663
1452
                        u"use_ipv6": u"True",
1664
 
                        u"debuglevel": u"",
1665
1453
                        }
1666
1454
    
1667
1455
    # Parse config file for server-global settings
1684
1472
    # options, if set.
1685
1473
    for option in (u"interface", u"address", u"port", u"debug",
1686
1474
                   u"priority", u"servicename", u"configdir",
1687
 
                   u"use_dbus", u"use_ipv6", u"debuglevel"):
 
1475
                   u"use_dbus", u"use_ipv6"):
1688
1476
        value = getattr(options, option)
1689
1477
        if value is not None:
1690
1478
            server_settings[option] = value
1699
1487
    
1700
1488
    # For convenience
1701
1489
    debug = server_settings[u"debug"]
1702
 
    debuglevel = server_settings[u"debuglevel"]
1703
1490
    use_dbus = server_settings[u"use_dbus"]
1704
1491
    use_ipv6 = server_settings[u"use_ipv6"]
1705
 
 
 
1492
    
 
1493
    if not debug:
 
1494
        syslogger.setLevel(logging.WARNING)
 
1495
        console.setLevel(logging.WARNING)
 
1496
    
1706
1497
    if server_settings[u"servicename"] != u"Mandos":
1707
1498
        syslogger.setFormatter(logging.Formatter
1708
1499
                               (u'Mandos (%s) [%%(process)d]:'
1714
1505
                        u"interval": u"5m",
1715
1506
                        u"checker": u"fping -q -- %%(host)s",
1716
1507
                        u"host": u"",
1717
 
                        u"approved_delay": u"0s",
1718
 
                        u"approved_duration": u"1s",
1719
1508
                        }
1720
1509
    client_config = configparser.SafeConfigParser(client_defaults)
1721
1510
    client_config.read(os.path.join(server_settings[u"configdir"],
1760
1549
            raise error
1761
1550
    
1762
1551
    # Enable all possible GnuTLS debugging
1763
 
 
1764
 
 
1765
 
    if not debug and not debuglevel:
1766
 
        syslogger.setLevel(logging.WARNING)
1767
 
        console.setLevel(logging.WARNING)
1768
 
    if debuglevel:
1769
 
        level = getattr(logging, debuglevel.upper())
1770
 
        syslogger.setLevel(level)
1771
 
        console.setLevel(level)
1772
 
 
1773
1552
    if debug:
1774
1553
        # "Use a log level over 10 to enable all debugging options."
1775
1554
        # - GnuTLS manual
1781
1560
        
1782
1561
        (gnutls.library.functions
1783
1562
         .gnutls_global_set_log_function(debug_gnutls))
1784
 
 
1785
 
        # Redirect stdin so all checkers get /dev/null
1786
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1787
 
        os.dup2(null, sys.stdin.fileno())
1788
 
        if null > 2:
1789
 
            os.close(null)
1790
 
    else:
1791
 
        # No console logging
1792
 
        logger.removeHandler(console)
1793
 
 
1794
1563
    
1795
1564
    global main_loop
1796
1565
    # From the Avahi example code
1814
1583
    if server_settings["interface"]:
1815
1584
        service.interface = (if_nametoindex
1816
1585
                             (str(server_settings[u"interface"])))
1817
 
 
1818
 
    if not debug:
1819
 
        # Close all input and output, do double fork, etc.
1820
 
        daemon()
1821
 
        
1822
 
    global multiprocessing_manager
1823
 
    multiprocessing_manager = multiprocessing.Manager()
1824
1586
    
1825
1587
    client_class = Client
1826
1588
    if use_dbus:
1827
1589
        client_class = functools.partial(ClientDBus, bus = bus)
1828
 
    def client_config_items(config, section):
1829
 
        special_settings = {
1830
 
            "approved_by_default":
1831
 
                lambda: config.getboolean(section,
1832
 
                                          "approved_by_default"),
1833
 
            }
1834
 
        for name, value in config.items(section):
1835
 
            try:
1836
 
                yield (name, special_settings[name]())
1837
 
            except KeyError:
1838
 
                yield (name, value)
1839
 
    
1840
1590
    tcp_server.clients.update(set(
1841
1591
            client_class(name = section,
1842
 
                         config= dict(client_config_items(
1843
 
                        client_config, section)))
 
1592
                         config= dict(client_config.items(section)))
1844
1593
            for section in client_config.sections()))
1845
1594
    if not tcp_server.clients:
1846
1595
        logger.warning(u"No clients defined")
1847
 
        
 
1596
    
 
1597
    if debug:
 
1598
        # Redirect stdin so all checkers get /dev/null
 
1599
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
1600
        os.dup2(null, sys.stdin.fileno())
 
1601
        if null > 2:
 
1602
            os.close(null)
 
1603
    else:
 
1604
        # No console logging
 
1605
        logger.removeHandler(console)
 
1606
        # Close all input and output, do double fork, etc.
 
1607
        daemon()
 
1608
    
1848
1609
    try:
1849
 
        with pidfile:
 
1610
        with closing(pidfile):
1850
1611
            pid = os.getpid()
1851
1612
            pidfile.write(str(pid) + "\n")
1852
1613
        del pidfile
1870
1631
                dbus.service.Object.__init__(self, bus, u"/")
1871
1632
            _interface = u"se.bsnet.fukt.Mandos"
1872
1633
            
1873
 
            @dbus.service.signal(_interface, signature=u"o")
1874
 
            def ClientAdded(self, objpath):
 
1634
            @dbus.service.signal(_interface, signature=u"oa{sv}")
 
1635
            def ClientAdded(self, objpath, properties):
1875
1636
                "D-Bus signal"
1876
1637
                pass
1877
1638
            
1939
1700
    for client in tcp_server.clients:
1940
1701
        if use_dbus:
1941
1702
            # Emit D-Bus signal
1942
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
 
1703
            mandos_dbus_service.ClientAdded(client.dbus_object_path,
 
1704
                                            client.GetAll(u""))
1943
1705
        client.enable()
1944
1706
    
1945
1707
    tcp_server.enable()