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* mandos (peer_certificate): Handle NULL pointer from
                             "gnutls_certificate_get_peers" slightly
                             better.
  (TCP_handler.handle): Added some extra debug output.

  (MandosServer.GetAllClients,
  MandosServer.GetAllClientsWithProperties,
  MandosServer.RemoveClient): Added doc string.

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mandos
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import SocketServer
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import socket
38
 
from optparse import OptionParser
 
38
import optparse
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import datetime
40
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import errno
41
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import gnutls.crypto
66
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import ctypes
67
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import ctypes.util
68
68
 
69
 
version = "1.0.3"
 
69
version = "1.0.5"
70
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71
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logger = logging.Logger('mandos')
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72
syslogger = (logging.handlers.SysLogHandler
178
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class Client(dbus.service.Object):
179
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    """A representation of a client host served by this server.
180
180
    Attributes:
181
 
    name:       string; from the config file, used in log messages
 
181
    name:       string; from the config file, used in log messages and
 
182
                        D-Bus identifiers
182
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    fingerprint: string (40 or 32 hexadecimal digits); used to
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                 uniquely identify the client
184
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    secret:     bytestring; sent verbatim (over TLS) to client
225
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        if config is None:
226
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            config = {}
227
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        logger.debug(u"Creating client %r", self.name)
228
 
        self.use_dbus = use_dbus
229
 
        if self.use_dbus:
230
 
            self.dbus_object_path = (dbus.ObjectPath
231
 
                                     ("/Mandos/clients/"
232
 
                                      + self.name.replace(".", "_")))
233
 
            dbus.service.Object.__init__(self, bus,
234
 
                                         self.dbus_object_path)
 
229
        self.use_dbus = False   # During __init__
235
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        # Uppercase and remove spaces from fingerprint for later
236
231
        # comparison purposes with return value from the fingerprint()
237
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        # function
261
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        self.disable_initiator_tag = None
262
257
        self.checker_callback_tag = None
263
258
        self.checker_command = config["checker"]
 
259
        self.last_connect = None
 
260
        # Only now, when this client is initialized, can it show up on
 
261
        # the D-Bus
 
262
        self.use_dbus = use_dbus
 
263
        if self.use_dbus:
 
264
            self.dbus_object_path = (dbus.ObjectPath
 
265
                                     ("/clients/"
 
266
                                      + self.name.replace(".", "_")))
 
267
            dbus.service.Object.__init__(self, bus,
 
268
                                         self.dbus_object_path)
264
269
    
265
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    def enable(self):
266
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        """Start this client's checker and timeout hooks"""
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            # Emit D-Bus signal
320
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            self.PropertyChanged(dbus.String(u"checker_running"),
321
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                                 dbus.Boolean(False, variant_level=1))
322
 
        if (os.WIFEXITED(condition)
323
 
            and (os.WEXITSTATUS(condition) == 0)):
324
 
            logger.info(u"Checker for %(name)s succeeded",
325
 
                        vars(self))
 
327
        if os.WIFEXITED(condition):
 
328
            exitstatus = os.WEXITSTATUS(condition)
 
329
            if exitstatus == 0:
 
330
                logger.info(u"Checker for %(name)s succeeded",
 
331
                            vars(self))
 
332
                self.checked_ok()
 
333
            else:
 
334
                logger.info(u"Checker for %(name)s failed",
 
335
                            vars(self))
326
336
            if self.use_dbus:
327
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                # Emit D-Bus signal
328
 
                self.CheckerCompleted(dbus.Boolean(True),
329
 
                                      dbus.UInt16(condition),
 
338
                self.CheckerCompleted(dbus.Int16(exitstatus),
 
339
                                      dbus.Int64(condition),
330
340
                                      dbus.String(command))
331
 
            self.bump_timeout()
332
 
        elif not os.WIFEXITED(condition):
 
341
        else:
333
342
            logger.warning(u"Checker for %(name)s crashed?",
334
343
                           vars(self))
335
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            if self.use_dbus:
336
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                # Emit D-Bus signal
337
 
                self.CheckerCompleted(dbus.Boolean(False),
338
 
                                      dbus.UInt16(condition),
339
 
                                      dbus.String(command))
340
 
        else:
341
 
            logger.info(u"Checker for %(name)s failed",
342
 
                        vars(self))
343
 
            if self.use_dbus:
344
 
                # Emit D-Bus signal
345
 
                self.CheckerCompleted(dbus.Boolean(False),
346
 
                                      dbus.UInt16(condition),
 
346
                self.CheckerCompleted(dbus.Int16(-1),
 
347
                                      dbus.Int64(condition),
347
348
                                      dbus.String(command))
348
349
    
349
 
    def bump_timeout(self):
 
350
    def checked_ok(self):
350
351
        """Bump up the timeout for this client.
351
352
        This should only be called when the client has been seen,
352
353
        alive and well.
448
449
            return now < (self.last_checked_ok + self.timeout)
449
450
    
450
451
    ## D-Bus methods & signals
451
 
    _interface = u"org.mandos_system.Mandos.Client"
 
452
    _interface = u"se.bsnet.fukt.Mandos.Client"
452
453
    
453
 
    # BumpTimeout - method
454
 
    BumpTimeout = dbus.service.method(_interface)(bump_timeout)
455
 
    BumpTimeout.__name__ = "BumpTimeout"
 
454
    # CheckedOK - method
 
455
    CheckedOK = dbus.service.method(_interface)(checked_ok)
 
456
    CheckedOK.__name__ = "CheckedOK"
456
457
    
457
458
    # CheckerCompleted - signal
458
 
    @dbus.service.signal(_interface, signature="bqs")
459
 
    def CheckerCompleted(self, success, condition, command):
 
459
    @dbus.service.signal(_interface, signature="nxs")
 
460
    def CheckerCompleted(self, exitcode, waitstatus, command):
460
461
        "D-Bus signal"
461
462
        pass
462
463
    
503
504
                dbus.String("checker_running"):
504
505
                    dbus.Boolean(self.checker is not None,
505
506
                                 variant_level=1),
 
507
                dbus.String("object_path"):
 
508
                    dbus.ObjectPath(self.dbus_object_path,
 
509
                                    variant_level=1)
506
510
                }, signature="sv")
507
511
    
508
512
    # IsStillValid - method
591
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        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
592
596
        # ...do the normal thing
593
597
        return session.peer_certificate
594
 
    list_size = ctypes.c_uint()
 
598
    list_size = ctypes.c_uint(1)
595
599
    cert_list = (gnutls.library.functions
596
600
                 .gnutls_certificate_get_peers
597
601
                 (session._c_object, ctypes.byref(list_size)))
 
602
    if not bool(cert_list) and list_size.value != 0:
 
603
        raise gnutls.errors.GNUTLSError("error getting peer"
 
604
                                        " certificate")
598
605
    if list_size.value == 0:
599
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        return None
600
607
    cert = cert_list[0]
684
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            # Do not run session.bye() here: the session is not
685
692
            # established.  Just abandon the request.
686
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            return
 
694
        logger.debug(u"Handshake succeeded")
687
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        try:
688
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            fpr = fingerprint(peer_certificate(session))
689
697
        except (TypeError, gnutls.errors.GNUTLSError), error:
709
717
            session.bye()
710
718
            return
711
719
        ## This won't work here, since we're in a fork.
712
 
        # client.bump_timeout()
 
720
        # client.checked_ok()
713
721
        sent_size = 0
714
722
        while sent_size < len(client.secret):
715
723
            sent = session.send(client.secret[sent_size:])
889
897
 
890
898
 
891
899
def main():
892
 
    parser = OptionParser(version = "%%prog %s" % version)
 
900
    parser = optparse.OptionParser(version = "%%prog %s" % version)
893
901
    parser.add_option("-i", "--interface", type="string",
894
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                      metavar="IF", help="Bind to interface IF")
895
903
    parser.add_option("-a", "--address", type="string",
937
945
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
938
946
    # Convert the SafeConfigParser object to a dict
939
947
    server_settings = server_config.defaults()
940
 
    # Use getboolean on the boolean config options
941
 
    server_settings["debug"] = (server_config.getboolean
942
 
                                ("DEFAULT", "debug"))
943
 
    server_settings["use_dbus"] = (server_config.getboolean
944
 
                                   ("DEFAULT", "use_dbus"))
 
948
    # Use the appropriate methods on the non-string config options
 
949
    server_settings["debug"] = server_config.getboolean("DEFAULT",
 
950
                                                        "debug")
 
951
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
 
952
                                                           "use_dbus")
 
953
    if server_settings["port"]:
 
954
        server_settings["port"] = server_config.getint("DEFAULT",
 
955
                                                       "port")
945
956
    del server_config
946
957
    
947
958
    # Override the settings from the config file with command line
972
983
    # Parse config file with clients
973
984
    client_defaults = { "timeout": "1h",
974
985
                        "interval": "5m",
975
 
                        "checker": "fping -q -- %(host)s",
 
986
                        "checker": "fping -q -- %%(host)s",
976
987
                        "host": "",
977
988
                        }
978
989
    client_config = ConfigParser.SafeConfigParser(client_defaults)
993
1004
    
994
1005
    try:
995
1006
        uid = pwd.getpwnam("_mandos").pw_uid
 
1007
        gid = pwd.getpwnam("_mandos").pw_gid
996
1008
    except KeyError:
997
1009
        try:
998
1010
            uid = pwd.getpwnam("mandos").pw_uid
 
1011
            gid = pwd.getpwnam("mandos").pw_gid
999
1012
        except KeyError:
1000
1013
            try:
1001
1014
                uid = pwd.getpwnam("nobody").pw_uid
 
1015
                gid = pwd.getpwnam("nogroup").pw_gid
1002
1016
            except KeyError:
1003
1017
                uid = 65534
1004
 
    try:
1005
 
        gid = pwd.getpwnam("_mandos").pw_gid
1006
 
    except KeyError:
1007
 
        try:
1008
 
            gid = pwd.getpwnam("mandos").pw_gid
1009
 
        except KeyError:
1010
 
            try:
1011
 
                gid = pwd.getpwnam("nogroup").pw_gid
1012
 
            except KeyError:
1013
1018
                gid = 65534
1014
1019
    try:
1015
1020
        os.setuid(uid)
1037
1042
                            avahi.DBUS_INTERFACE_SERVER)
1038
1043
    # End of Avahi example code
1039
1044
    if use_dbus:
1040
 
        bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
1041
 
                                        bus)
 
1045
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1042
1046
    
1043
1047
    clients.update(Set(Client(name = section,
1044
1048
                              config
1098
1102
        class MandosServer(dbus.service.Object):
1099
1103
            """A D-Bus proxy object"""
1100
1104
            def __init__(self):
1101
 
                dbus.service.Object.__init__(self, bus,
1102
 
                                             "/Mandos")
1103
 
            _interface = u"org.mandos_system.Mandos"
1104
 
 
 
1105
                dbus.service.Object.__init__(self, bus, "/")
 
1106
            _interface = u"se.bsnet.fukt.Mandos"
 
1107
            
1105
1108
            @dbus.service.signal(_interface, signature="oa{sv}")
1106
1109
            def ClientAdded(self, objpath, properties):
1107
1110
                "D-Bus signal"
1108
1111
                pass
1109
 
 
1110
 
            @dbus.service.signal(_interface, signature="o")
1111
 
            def ClientRemoved(self, objpath):
 
1112
            
 
1113
            @dbus.service.signal(_interface, signature="os")
 
1114
            def ClientRemoved(self, objpath, name):
1112
1115
                "D-Bus signal"
1113
1116
                pass
1114
 
 
 
1117
            
1115
1118
            @dbus.service.method(_interface, out_signature="ao")
1116
1119
            def GetAllClients(self):
 
1120
                "D-Bus method"
1117
1121
                return dbus.Array(c.dbus_object_path for c in clients)
1118
 
 
 
1122
            
1119
1123
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
1120
1124
            def GetAllClientsWithProperties(self):
 
1125
                "D-Bus method"
1121
1126
                return dbus.Dictionary(
1122
1127
                    ((c.dbus_object_path, c.GetAllProperties())
1123
1128
                     for c in clients),
1124
1129
                    signature="oa{sv}")
1125
 
 
 
1130
            
1126
1131
            @dbus.service.method(_interface, in_signature="o")
1127
1132
            def RemoveClient(self, object_path):
 
1133
                "D-Bus method"
1128
1134
                for c in clients:
1129
1135
                    if c.dbus_object_path == object_path:
1130
1136
                        clients.remove(c)
1132
1138
                        c.use_dbus = False
1133
1139
                        c.disable()
1134
1140
                        # Emit D-Bus signal
1135
 
                        self.ClientRemoved(object_path)
 
1141
                        self.ClientRemoved(object_path, c.name)
1136
1142
                        return
1137
1143
                raise KeyError
1138
 
            @dbus.service.method(_interface)
1139
 
            def Quit(self):
1140
 
                main_loop.quit()
1141
 
 
 
1144
            
1142
1145
            del _interface
1143
 
    
 
1146
        
1144
1147
        mandos_server = MandosServer()
1145
1148
    
1146
1149
    for client in clients: