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removed * [[http://en.tldp.org/HOWTO/Software-Release-Practice-HOWTO/][Software Release Practice HOWTO]]

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mandos
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#     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
28
 
# <http://www.gnu.org/licenses/>.
 
27
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
29
28
# 
30
29
# Contact the authors at <mandos@fukt.bsnet.se>.
31
30
# 
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
 
import pwd
59
57
 
60
58
import dbus
61
59
import gobject
63
61
from dbus.mainloop.glib import DBusGMainLoop
64
62
import ctypes
65
63
 
66
 
version = "1.0"
67
64
 
68
65
logger = logging.Logger('mandos')
69
66
syslogger = logging.handlers.SysLogHandler\
73
70
                        ('Mandos: %(levelname)s: %(message)s'))
74
71
logger.addHandler(syslogger)
75
72
 
76
 
console = logging.StreamHandler()
77
 
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
 
                                       ' %(message)s'))
79
 
logger.addHandler(console)
80
73
 
81
74
class AvahiError(Exception):
82
75
    def __init__(self, value):
121
114
        self.domain = domain
122
115
        self.host = host
123
116
        self.rename_count = 0
124
 
        self.max_renames = max_renames
125
117
    def rename(self):
126
118
        """Derived from the Avahi example code"""
127
119
        if self.rename_count >= self.max_renames:
128
 
            logger.critical(u"No suitable Zeroconf service name found"
129
 
                            u" after %i retries, exiting.",
130
 
                            rename_count)
 
120
            logger.critical(u"No suitable service name found after %i"
 
121
                            u" retries, exiting.", rename_count)
131
122
            raise AvahiServiceError("Too many renames")
132
 
        self.name = server.GetAlternativeServiceName(self.name)
133
 
        logger.info(u"Changing Zeroconf service name to %r ...",
134
 
                    str(self.name))
 
123
        name = server.GetAlternativeServiceName(name)
 
124
        logger.error(u"Changing name to %r ...", name)
135
125
        syslogger.setFormatter(logging.Formatter\
136
126
                               ('Mandos (%s): %%(levelname)s:'
137
 
                               ' %%(message)s' % self.name))
 
127
                               ' %%(message)s' % name))
138
128
        self.remove()
139
129
        self.add()
140
130
        self.rename_count += 1
152
142
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
143
            group.connect_to_signal('StateChanged',
154
144
                                    entry_group_state_changed)
155
 
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
145
        logger.debug(u"Adding service '%s' of type '%s' ...",
156
146
                     service.name, service.type)
157
147
        group.AddService(
158
148
                self.interface,         # interface
341
331
            try:
342
332
                logger.info(u"Starting checker %r for %s",
343
333
                            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.)
348
334
                self.checker = subprocess.Popen(command,
349
335
                                                close_fds=True,
350
336
                                                shell=True, cwd="/")
351
337
                self.checker_callback_tag = gobject.child_watch_add\
352
338
                                            (self.checker.pid,
353
339
                                             self.checker_callback)
354
 
            except OSError, error:
 
340
            except subprocess.OSError, error:
355
341
                logger.error(u"Failed to start subprocess: %s",
356
342
                             error)
357
343
        # Re-run this periodically if run by gobject.timeout_add
414
400
    gnutls.library.functions.gnutls_openpgp_crt_import\
415
401
                    (crt, ctypes.byref(datum),
416
402
                     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")
424
403
    # New buffer for the fingerprint
425
404
    buffer = ctypes.create_string_buffer(20)
426
405
    buffer_length = ctypes.c_size_t()
518
497
    Attributes:
519
498
        settings:       Server settings
520
499
        clients:        Set() of Client objects
521
 
        enabled:        Boolean; whether this server is activated yet
522
500
    """
523
501
    address_family = socket.AF_INET6
524
502
    def __init__(self, *args, **kwargs):
528
506
        if "clients" in kwargs:
529
507
            self.clients = kwargs["clients"]
530
508
            del kwargs["clients"]
531
 
        self.enabled = False
532
509
        return super(type(self), self).__init__(*args, **kwargs)
533
510
    def server_bind(self):
534
511
        """This overrides the normal server_bind() function
565
542
#                                            (self.settings
566
543
#                                             ["interface"]))
567
544
            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
573
545
 
574
546
 
575
547
def string_to_delta(interval):
585
557
    datetime.timedelta(1)
586
558
    >>> string_to_delta(u'1w')
587
559
    datetime.timedelta(7)
588
 
    >>> string_to_delta('5m 30s')
589
 
    datetime.timedelta(0, 330)
590
560
    """
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):
 
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:
609
575
            raise ValueError
610
 
        timevalue += delta
611
 
    return timevalue
 
576
    except (ValueError, IndexError):
 
577
        raise ValueError
 
578
    return delta
612
579
 
613
580
 
614
581
def server_state_changed(state):
615
582
    """Derived from the Avahi example code"""
616
583
    if state == avahi.SERVER_COLLISION:
617
 
        logger.error(u"Zeroconf server name collision")
 
584
        logger.error(u"Server name collision")
618
585
        service.remove()
619
586
    elif state == avahi.SERVER_RUNNING:
620
587
        service.add()
622
589
 
623
590
def entry_group_state_changed(state, error):
624
591
    """Derived from the Avahi example code"""
625
 
    logger.debug(u"Avahi state change: %i", state)
 
592
    logger.debug(u"state change: %i", state)
626
593
    
627
594
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
628
 
        logger.debug(u"Zeroconf service established.")
 
595
        logger.debug(u"Service established.")
629
596
    elif state == avahi.ENTRY_GROUP_COLLISION:
630
 
        logger.warning(u"Zeroconf service name collision.")
 
597
        logger.warning(u"Service name collision.")
631
598
        service.rename()
632
599
    elif state == avahi.ENTRY_GROUP_FAILURE:
633
 
        logger.critical(u"Avahi: Error in group state changed %s",
 
600
        logger.critical(u"Error in group state changed %s",
634
601
                        unicode(error))
635
602
        raise AvahiGroupError("State changed: %s", str(error))
636
603
 
686
653
    global main_loop_started
687
654
    main_loop_started = False
688
655
    
689
 
    parser = OptionParser(version = "%%prog %s" % version)
 
656
    parser = OptionParser()
690
657
    parser.add_option("-i", "--interface", type="string",
691
658
                      metavar="IF", help="Bind to interface IF")
692
659
    parser.add_option("-a", "--address", type="string",
727
694
    server_config = ConfigParser.SafeConfigParser(server_defaults)
728
695
    del server_defaults
729
696
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
697
    server_section = "server"
730
698
    # Convert the SafeConfigParser object to a dict
731
 
    server_settings = server_config.defaults()
 
699
    server_settings = dict(server_config.items(server_section))
732
700
    # Use getboolean on the boolean config option
733
701
    server_settings["debug"] = server_config.getboolean\
734
 
                               ("DEFAULT", "debug")
 
702
                               (server_section, "debug")
735
703
    del server_config
736
704
    
737
705
    # Override the settings from the config file with command line
748
716
    
749
717
    if not debug:
750
718
        syslogger.setLevel(logging.WARNING)
751
 
        console.setLevel(logging.WARNING)
752
719
    
753
720
    if server_settings["servicename"] != "Mandos":
754
721
        syslogger.setFormatter(logging.Formatter\
759
726
    # Parse config file with clients
760
727
    client_defaults = { "timeout": "1h",
761
728
                        "interval": "5m",
762
 
                        "checker": "fping -q -- %(host)s",
763
 
                        "host": "",
 
729
                        "checker": "fping -q -- %%(host)s",
764
730
                        }
765
731
    client_config = ConfigParser.SafeConfigParser(client_defaults)
766
732
    client_config.read(os.path.join(server_settings["configdir"],
767
733
                                    "clients.conf"))
768
734
    
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
 
    
804
735
    global service
805
736
    service = AvahiService(name = server_settings["servicename"],
806
737
                           type = "_mandos._tcp", );
807
738
    if server_settings["interface"]:
808
 
        service.interface = if_nametoindex\
809
 
                            (server_settings["interface"])
 
739
        service.interface = if_nametoindex(server_settings["interface"])
810
740
    
811
741
    global main_loop
812
742
    global bus
815
745
    DBusGMainLoop(set_as_default=True )
816
746
    main_loop = gobject.MainLoop()
817
747
    bus = dbus.SystemBus()
818
 
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
 
                                           avahi.DBUS_PATH_SERVER),
820
 
                            avahi.DBUS_INTERFACE_SERVER)
 
748
    server = dbus.Interface(
 
749
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
750
            avahi.DBUS_INTERFACE_SERVER )
821
751
    # End of Avahi example code
822
752
    
 
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()
823
762
    def remove_from_clients(client):
824
763
        clients.remove(client)
825
764
        if not clients:
835
774
        logger.critical(u"No clients defined")
836
775
        sys.exit(1)
837
776
    
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.
 
777
    if not debug:
848
778
        daemon()
849
779
    
 
780
    pidfilename = "/var/run/mandos/mandos.pid"
 
781
    pid = os.getpid()
850
782
    try:
851
 
        pid = os.getpid()
 
783
        pidfile = open(pidfilename, "w")
852
784
        pidfile.write(str(pid) + "\n")
853
785
        pidfile.close()
854
786
        del pidfile
855
787
    except IOError, err:
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
 
788
        logger.error(u"Could not write %s file with PID %d",
 
789
                     pidfilename, os.getpid())
862
790
    
863
791
    def cleanup():
864
792
        "Cleanup function; run on exit"
884
812
    for client in clients:
885
813
        client.start()
886
814
    
887
 
    tcp_server.enable()
888
 
    tcp_server.server_activate()
889
 
    
 
815
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
816
                                 server_settings["port"]),
 
817
                                tcp_handler,
 
818
                                settings=server_settings,
 
819
                                clients=clients)
890
820
    # Find out what port we got
891
821
    service.port = tcp_server.socket.getsockname()[1]
892
822
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"