/mandos/trunk

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/trunk

« back to all changes in this revision

Viewing changes to mandos

  • Committer: Teddy Hogeborn
  • Date: 2008-09-13 15:36:18 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080913153618-atp386q2bqj0ku99
* Makefile (install-client-nokey): Do "&&" instead of ";" to catch
                                   errors.

* README: Kill the straight quotes.  Add copyright notice.

* overview.xml: Improved wording.

Show diffs side-by-side

added added

removed removed

Lines of Context:
mandos
24
24
#     GNU General Public License for more details.
25
25
# 
26
26
# 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
29
# 
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
61
63
from dbus.mainloop.glib import DBusGMainLoop
62
64
import ctypes
63
65
 
 
66
version = "1.0"
64
67
 
65
68
logger = logging.Logger('mandos')
66
69
syslogger = logging.handlers.SysLogHandler\
70
73
                        ('Mandos: %(levelname)s: %(message)s'))
71
74
logger.addHandler(syslogger)
72
75
 
 
76
console = logging.StreamHandler()
 
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
 
78
                                       ' %(message)s'))
 
79
logger.addHandler(console)
73
80
 
74
81
class AvahiError(Exception):
75
82
    def __init__(self, value):
114
121
        self.domain = domain
115
122
        self.host = host
116
123
        self.rename_count = 0
 
124
        self.max_renames = max_renames
117
125
    def rename(self):
118
126
        """Derived from the Avahi example code"""
119
127
        if self.rename_count >= self.max_renames:
120
 
            logger.critical(u"No suitable service name found after %i"
121
 
                            u" retries, exiting.", rename_count)
 
128
            logger.critical(u"No suitable Zeroconf service name found"
 
129
                            u" after %i retries, exiting.",
 
130
                            rename_count)
122
131
            raise AvahiServiceError("Too many renames")
123
 
        name = server.GetAlternativeServiceName(name)
124
 
        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))
125
135
        syslogger.setFormatter(logging.Formatter\
126
136
                               ('Mandos (%s): %%(levelname)s:'
127
 
                               ' %%(message)s' % name))
 
137
                               ' %%(message)s' % self.name))
128
138
        self.remove()
129
139
        self.add()
130
140
        self.rename_count += 1
142
152
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
143
153
            group.connect_to_signal('StateChanged',
144
154
                                    entry_group_state_changed)
145
 
        logger.debug(u"Adding service '%s' of type '%s' ...",
 
155
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
146
156
                     service.name, service.type)
147
157
        group.AddService(
148
158
                self.interface,         # interface
331
341
            try:
332
342
                logger.info(u"Starting checker %r for %s",
333
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.)
334
348
                self.checker = subprocess.Popen(command,
335
349
                                                close_fds=True,
336
350
                                                shell=True, cwd="/")
337
351
                self.checker_callback_tag = gobject.child_watch_add\
338
352
                                            (self.checker.pid,
339
353
                                             self.checker_callback)
340
 
            except subprocess.OSError, error:
 
354
            except OSError, error:
341
355
                logger.error(u"Failed to start subprocess: %s",
342
356
                             error)
343
357
        # Re-run this periodically if run by gobject.timeout_add
400
414
    gnutls.library.functions.gnutls_openpgp_crt_import\
401
415
                    (crt, ctypes.byref(datum),
402
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")
403
424
    # New buffer for the fingerprint
404
425
    buffer = ctypes.create_string_buffer(20)
405
426
    buffer_length = ctypes.c_size_t()
497
518
    Attributes:
498
519
        settings:       Server settings
499
520
        clients:        Set() of Client objects
 
521
        enabled:        Boolean; whether this server is activated yet
500
522
    """
501
523
    address_family = socket.AF_INET6
502
524
    def __init__(self, *args, **kwargs):
506
528
        if "clients" in kwargs:
507
529
            self.clients = kwargs["clients"]
508
530
            del kwargs["clients"]
 
531
        self.enabled = False
509
532
        return super(type(self), self).__init__(*args, **kwargs)
510
533
    def server_bind(self):
511
534
        """This overrides the normal server_bind() function
542
565
#                                            (self.settings
543
566
#                                             ["interface"]))
544
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
545
573
 
546
574
 
547
575
def string_to_delta(interval):
557
585
    datetime.timedelta(1)
558
586
    >>> string_to_delta(u'1w')
559
587
    datetime.timedelta(7)
 
588
    >>> string_to_delta('5m 30s')
 
589
    datetime.timedelta(0, 330)
560
590
    """
561
 
    try:
562
 
        suffix=unicode(interval[-1])
563
 
        value=int(interval[:-1])
564
 
        if suffix == u"d":
565
 
            delta = datetime.timedelta(value)
566
 
        elif suffix == u"s":
567
 
            delta = datetime.timedelta(0, value)
568
 
        elif suffix == u"m":
569
 
            delta = datetime.timedelta(0, 0, 0, 0, value)
570
 
        elif suffix == u"h":
571
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
572
 
        elif suffix == u"w":
573
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
574
 
        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):
575
609
            raise ValueError
576
 
    except (ValueError, IndexError):
577
 
        raise ValueError
578
 
    return delta
 
610
        timevalue += delta
 
611
    return timevalue
579
612
 
580
613
 
581
614
def server_state_changed(state):
582
615
    """Derived from the Avahi example code"""
583
616
    if state == avahi.SERVER_COLLISION:
584
 
        logger.error(u"Server name collision")
 
617
        logger.error(u"Zeroconf server name collision")
585
618
        service.remove()
586
619
    elif state == avahi.SERVER_RUNNING:
587
620
        service.add()
589
622
 
590
623
def entry_group_state_changed(state, error):
591
624
    """Derived from the Avahi example code"""
592
 
    logger.debug(u"state change: %i", state)
 
625
    logger.debug(u"Avahi state change: %i", state)
593
626
    
594
627
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
595
 
        logger.debug(u"Service established.")
 
628
        logger.debug(u"Zeroconf service established.")
596
629
    elif state == avahi.ENTRY_GROUP_COLLISION:
597
 
        logger.warning(u"Service name collision.")
 
630
        logger.warning(u"Zeroconf service name collision.")
598
631
        service.rename()
599
632
    elif state == avahi.ENTRY_GROUP_FAILURE:
600
 
        logger.critical(u"Error in group state changed %s",
 
633
        logger.critical(u"Avahi: Error in group state changed %s",
601
634
                        unicode(error))
602
635
        raise AvahiGroupError("State changed: %s", str(error))
603
636
 
653
686
    global main_loop_started
654
687
    main_loop_started = False
655
688
    
656
 
    parser = OptionParser()
 
689
    parser = OptionParser(version = "%%prog %s" % version)
657
690
    parser.add_option("-i", "--interface", type="string",
658
691
                      metavar="IF", help="Bind to interface IF")
659
692
    parser.add_option("-a", "--address", type="string",
694
727
    server_config = ConfigParser.SafeConfigParser(server_defaults)
695
728
    del server_defaults
696
729
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
697
 
    server_section = "server"
698
730
    # Convert the SafeConfigParser object to a dict
699
 
    server_settings = dict(server_config.items(server_section))
 
731
    server_settings = server_config.defaults()
700
732
    # Use getboolean on the boolean config option
701
733
    server_settings["debug"] = server_config.getboolean\
702
 
                               (server_section, "debug")
 
734
                               ("DEFAULT", "debug")
703
735
    del server_config
704
736
    
705
737
    # Override the settings from the config file with command line
716
748
    
717
749
    if not debug:
718
750
        syslogger.setLevel(logging.WARNING)
 
751
        console.setLevel(logging.WARNING)
719
752
    
720
753
    if server_settings["servicename"] != "Mandos":
721
754
        syslogger.setFormatter(logging.Formatter\
726
759
    # Parse config file with clients
727
760
    client_defaults = { "timeout": "1h",
728
761
                        "interval": "5m",
729
 
                        "checker": "fping -q -- %%(host)s",
 
762
                        "checker": "fping -q -- %(host)s",
 
763
                        "host": "",
730
764
                        }
731
765
    client_config = ConfigParser.SafeConfigParser(client_defaults)
732
766
    client_config.read(os.path.join(server_settings["configdir"],
733
767
                                    "clients.conf"))
734
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
    
735
804
    global service
736
805
    service = AvahiService(name = server_settings["servicename"],
737
806
                           type = "_mandos._tcp", );
738
807
    if server_settings["interface"]:
739
 
        service.interface = if_nametoindex(server_settings["interface"])
 
808
        service.interface = if_nametoindex\
 
809
                            (server_settings["interface"])
740
810
    
741
811
    global main_loop
742
812
    global bus
745
815
    DBusGMainLoop(set_as_default=True )
746
816
    main_loop = gobject.MainLoop()
747
817
    bus = dbus.SystemBus()
748
 
    server = dbus.Interface(
749
 
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
750
 
            avahi.DBUS_INTERFACE_SERVER )
 
818
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
819
                                           avahi.DBUS_PATH_SERVER),
 
820
                            avahi.DBUS_INTERFACE_SERVER)
751
821
    # End of Avahi example code
752
822
    
753
 
    if debug:
754
 
        console = logging.StreamHandler()
755
 
        # console.setLevel(logging.DEBUG)
756
 
        console.setFormatter(logging.Formatter\
757
 
                             ('%(levelname)s: %(message)s'))
758
 
        logger.addHandler(console)
759
 
        del console
760
 
    
761
 
    clients = Set()
762
823
    def remove_from_clients(client):
763
824
        clients.remove(client)
764
825
        if not clients:
774
835
        logger.critical(u"No clients defined")
775
836
        sys.exit(1)
776
837
    
777
 
    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
 
846
        logger.removeHandler(console)
 
847
        # Close all input and output, do double fork, etc.
778
848
        daemon()
779
849
    
780
 
    pidfilename = "/var/run/mandos/mandos.pid"
781
 
    pid = os.getpid()
782
850
    try:
783
 
        pidfile = open(pidfilename, "w")
 
851
        pid = os.getpid()
784
852
        pidfile.write(str(pid) + "\n")
785
853
        pidfile.close()
786
854
        del pidfile
787
855
    except IOError, err:
788
 
        logger.error(u"Could not write %s file with PID %d",
789
 
                     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
790
862
    
791
863
    def cleanup():
792
864
        "Cleanup function; run on exit"
812
884
    for client in clients:
813
885
        client.start()
814
886
    
815
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
816
 
                                 server_settings["port"]),
817
 
                                tcp_handler,
818
 
                                settings=server_settings,
819
 
                                clients=clients)
 
887
    tcp_server.enable()
 
888
    tcp_server.server_activate()
 
889
    
820
890
    # Find out what port we got
821
891
    service.port = tcp_server.socket.getsockname()[1]
822
892
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"