/mandos/release

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  • Committer: Teddy Hogeborn
  • Date: 2008-09-13 19:20:50 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080913192050-gxuo0jv4o25jn848
* TODO: Minor changes.

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mandos
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#     GNU General Public License for more details.
25
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# 
26
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# You should have received a copy of the GNU General Public License
27
 
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
27
# along with this program.  If not, see
 
28
# <http://www.gnu.org/licenses/>.
28
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# 
29
30
# Contact the authors at <mandos@fukt.bsnet.se>.
30
31
# 
54
55
import stat
55
56
import logging
56
57
import logging.handlers
 
58
import pwd
57
59
 
58
60
import dbus
59
61
import gobject
119
121
        self.domain = domain
120
122
        self.host = host
121
123
        self.rename_count = 0
 
124
        self.max_renames = max_renames
122
125
    def rename(self):
123
126
        """Derived from the Avahi example code"""
124
127
        if self.rename_count >= self.max_renames:
125
 
            logger.critical(u"No suitable service name found after %i"
126
 
                            u" retries, exiting.", rename_count)
 
128
            logger.critical(u"No suitable Zeroconf service name found"
 
129
                            u" after %i retries, exiting.",
 
130
                            rename_count)
127
131
            raise AvahiServiceError("Too many renames")
128
 
        name = server.GetAlternativeServiceName(name)
129
 
        logger.error(u"Changing name to %r ...", name)
 
132
        self.name = server.GetAlternativeServiceName(self.name)
 
133
        logger.info(u"Changing Zeroconf service name to %r ...",
 
134
                    str(self.name))
130
135
        syslogger.setFormatter(logging.Formatter\
131
136
                               ('Mandos (%s): %%(levelname)s:'
132
 
                               ' %%(message)s' % name))
 
137
                               ' %%(message)s' % self.name))
133
138
        self.remove()
134
139
        self.add()
135
140
        self.rename_count += 1
147
152
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
148
153
            group.connect_to_signal('StateChanged',
149
154
                                    entry_group_state_changed)
150
 
        logger.debug(u"Adding service '%s' of type '%s' ...",
 
155
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
151
156
                     service.name, service.type)
152
157
        group.AddService(
153
158
                self.interface,         # interface
336
341
            try:
337
342
                logger.info(u"Starting checker %r for %s",
338
343
                            command, self.name)
 
344
                # We don't need to redirect stdout and stderr, since
 
345
                # in normal mode, that is already done by daemon(),
 
346
                # and in debug mode we don't want to.  (Stdin is
 
347
                # always replaced by /dev/null.)
339
348
                self.checker = subprocess.Popen(command,
340
349
                                                close_fds=True,
341
350
                                                shell=True, cwd="/")
342
351
                self.checker_callback_tag = gobject.child_watch_add\
343
352
                                            (self.checker.pid,
344
353
                                             self.checker_callback)
345
 
            except subprocess.OSError, error:
 
354
            except OSError, error:
346
355
                logger.error(u"Failed to start subprocess: %s",
347
356
                             error)
348
357
        # Re-run this periodically if run by gobject.timeout_add
405
414
    gnutls.library.functions.gnutls_openpgp_crt_import\
406
415
                    (crt, ctypes.byref(datum),
407
416
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
417
    # Verify the self signature in the key
 
418
    crtverify = ctypes.c_uint();
 
419
    gnutls.library.functions.gnutls_openpgp_crt_verify_self\
 
420
        (crt, 0, ctypes.byref(crtverify))
 
421
    if crtverify.value != 0:
 
422
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
423
        raise gnutls.errors.CertificateSecurityError("Verify failed")
408
424
    # New buffer for the fingerprint
409
425
    buffer = ctypes.create_string_buffer(20)
410
426
    buffer_length = ctypes.c_size_t()
502
518
    Attributes:
503
519
        settings:       Server settings
504
520
        clients:        Set() of Client objects
 
521
        enabled:        Boolean; whether this server is activated yet
505
522
    """
506
523
    address_family = socket.AF_INET6
507
524
    def __init__(self, *args, **kwargs):
511
528
        if "clients" in kwargs:
512
529
            self.clients = kwargs["clients"]
513
530
            del kwargs["clients"]
 
531
        self.enabled = False
514
532
        return super(type(self), self).__init__(*args, **kwargs)
515
533
    def server_bind(self):
516
534
        """This overrides the normal server_bind() function
547
565
#                                            (self.settings
548
566
#                                             ["interface"]))
549
567
            return super(type(self), self).server_bind()
 
568
    def server_activate(self):
 
569
        if self.enabled:
 
570
            return super(type(self), self).server_activate()
 
571
    def enable(self):
 
572
        self.enabled = True
550
573
 
551
574
 
552
575
def string_to_delta(interval):
562
585
    datetime.timedelta(1)
563
586
    >>> string_to_delta(u'1w')
564
587
    datetime.timedelta(7)
 
588
    >>> string_to_delta('5m 30s')
 
589
    datetime.timedelta(0, 330)
565
590
    """
566
 
    try:
567
 
        suffix=unicode(interval[-1])
568
 
        value=int(interval[:-1])
569
 
        if suffix == u"d":
570
 
            delta = datetime.timedelta(value)
571
 
        elif suffix == u"s":
572
 
            delta = datetime.timedelta(0, value)
573
 
        elif suffix == u"m":
574
 
            delta = datetime.timedelta(0, 0, 0, 0, value)
575
 
        elif suffix == u"h":
576
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
577
 
        elif suffix == u"w":
578
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
579
 
        else:
 
591
    timevalue = datetime.timedelta(0)
 
592
    for s in interval.split():
 
593
        try:
 
594
            suffix=unicode(s[-1])
 
595
            value=int(s[:-1])
 
596
            if suffix == u"d":
 
597
                delta = datetime.timedelta(value)
 
598
            elif suffix == u"s":
 
599
                delta = datetime.timedelta(0, value)
 
600
            elif suffix == u"m":
 
601
                delta = datetime.timedelta(0, 0, 0, 0, value)
 
602
            elif suffix == u"h":
 
603
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
604
            elif suffix == u"w":
 
605
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
606
            else:
 
607
                raise ValueError
 
608
        except (ValueError, IndexError):
580
609
            raise ValueError
581
 
    except (ValueError, IndexError):
582
 
        raise ValueError
583
 
    return delta
 
610
        timevalue += delta
 
611
    return timevalue
584
612
 
585
613
 
586
614
def server_state_changed(state):
587
615
    """Derived from the Avahi example code"""
588
616
    if state == avahi.SERVER_COLLISION:
589
 
        logger.error(u"Server name collision")
 
617
        logger.error(u"Zeroconf server name collision")
590
618
        service.remove()
591
619
    elif state == avahi.SERVER_RUNNING:
592
620
        service.add()
594
622
 
595
623
def entry_group_state_changed(state, error):
596
624
    """Derived from the Avahi example code"""
597
 
    logger.debug(u"state change: %i", state)
 
625
    logger.debug(u"Avahi state change: %i", state)
598
626
    
599
627
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
600
 
        logger.debug(u"Service established.")
 
628
        logger.debug(u"Zeroconf service established.")
601
629
    elif state == avahi.ENTRY_GROUP_COLLISION:
602
 
        logger.warning(u"Service name collision.")
 
630
        logger.warning(u"Zeroconf service name collision.")
603
631
        service.rename()
604
632
    elif state == avahi.ENTRY_GROUP_FAILURE:
605
 
        logger.critical(u"Error in group state changed %s",
 
633
        logger.critical(u"Avahi: Error in group state changed %s",
606
634
                        unicode(error))
607
635
        raise AvahiGroupError("State changed: %s", str(error))
608
636
 
699
727
    server_config = ConfigParser.SafeConfigParser(server_defaults)
700
728
    del server_defaults
701
729
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
702
 
    server_section = "server"
703
730
    # Convert the SafeConfigParser object to a dict
704
 
    server_settings = dict(server_config.items(server_section))
 
731
    server_settings = server_config.defaults()
705
732
    # Use getboolean on the boolean config option
706
733
    server_settings["debug"] = server_config.getboolean\
707
 
                               (server_section, "debug")
 
734
                               ("DEFAULT", "debug")
708
735
    del server_config
709
736
    
710
737
    # Override the settings from the config file with command line
732
759
    # Parse config file with clients
733
760
    client_defaults = { "timeout": "1h",
734
761
                        "interval": "5m",
735
 
                        "checker": "fping -q -- %%(host)s",
 
762
                        "checker": "fping -q -- %(host)s",
 
763
                        "host": "",
736
764
                        }
737
765
    client_config = ConfigParser.SafeConfigParser(client_defaults)
738
766
    client_config.read(os.path.join(server_settings["configdir"],
739
767
                                    "clients.conf"))
740
768
    
 
769
    clients = Set()
 
770
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
771
                                 server_settings["port"]),
 
772
                                tcp_handler,
 
773
                                settings=server_settings,
 
774
                                clients=clients)
 
775
    pidfilename = "/var/run/mandos.pid"
 
776
    try:
 
777
        pidfile = open(pidfilename, "w")
 
778
    except IOError, error:
 
779
        logger.error("Could not open file %r", pidfilename)
 
780
    
 
781
    uid = 65534
 
782
    gid = 65534
 
783
    try:
 
784
        uid = pwd.getpwnam("mandos").pw_uid
 
785
    except KeyError:
 
786
        try:
 
787
            uid = pwd.getpwnam("nobody").pw_uid
 
788
        except KeyError:
 
789
            pass
 
790
    try:
 
791
        gid = pwd.getpwnam("mandos").pw_gid
 
792
    except KeyError:
 
793
        try:
 
794
            gid = pwd.getpwnam("nogroup").pw_gid
 
795
        except KeyError:
 
796
            pass
 
797
    try:
 
798
        os.setuid(uid)
 
799
        os.setgid(gid)
 
800
    except OSError, error:
 
801
        if error[0] != errno.EPERM:
 
802
            raise error
 
803
    
741
804
    global service
742
805
    service = AvahiService(name = server_settings["servicename"],
743
806
                           type = "_mandos._tcp", );
744
807
    if server_settings["interface"]:
745
 
        service.interface = if_nametoindex(server_settings["interface"])
 
808
        service.interface = if_nametoindex\
 
809
                            (server_settings["interface"])
746
810
    
747
811
    global main_loop
748
812
    global bus
751
815
    DBusGMainLoop(set_as_default=True )
752
816
    main_loop = gobject.MainLoop()
753
817
    bus = dbus.SystemBus()
754
 
    server = dbus.Interface(
755
 
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
756
 
            avahi.DBUS_INTERFACE_SERVER )
 
818
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
819
                                           avahi.DBUS_PATH_SERVER),
 
820
                            avahi.DBUS_INTERFACE_SERVER)
757
821
    # End of Avahi example code
758
822
    
759
 
    clients = Set()
760
823
    def remove_from_clients(client):
761
824
        clients.remove(client)
762
825
        if not clients:
772
835
        logger.critical(u"No clients defined")
773
836
        sys.exit(1)
774
837
    
775
 
    if not debug:
 
838
    if debug:
 
839
        # Redirect stdin so all checkers get /dev/null
 
840
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
841
        os.dup2(null, sys.stdin.fileno())
 
842
        if null > 2:
 
843
            os.close(null)
 
844
    else:
 
845
        # No console logging
776
846
        logger.removeHandler(console)
 
847
        # Close all input and output, do double fork, etc.
777
848
        daemon()
778
849
    
779
 
    pidfilename = "/var/run/mandos/mandos.pid"
780
 
    pid = os.getpid()
781
850
    try:
782
 
        pidfile = open(pidfilename, "w")
 
851
        pid = os.getpid()
783
852
        pidfile.write(str(pid) + "\n")
784
853
        pidfile.close()
785
854
        del pidfile
786
855
    except IOError, err:
787
 
        logger.error(u"Could not write %s file with PID %d",
788
 
                     pidfilename, os.getpid())
 
856
        logger.error(u"Could not write to file %r with PID %d",
 
857
                     pidfilename, pid)
 
858
    except NameError:
 
859
        # "pidfile" was never created
 
860
        pass
 
861
    del pidfilename
789
862
    
790
863
    def cleanup():
791
864
        "Cleanup function; run on exit"
811
884
    for client in clients:
812
885
        client.start()
813
886
    
814
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
815
 
                                 server_settings["port"]),
816
 
                                tcp_handler,
817
 
                                settings=server_settings,
818
 
                                clients=clients)
 
887
    tcp_server.enable()
 
888
    tcp_server.server_activate()
 
889
    
819
890
    # Find out what port we got
820
891
    service.port = tcp_server.socket.getsockname()[1]
821
892
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"