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mandos
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from dbus.mainloop.glib import DBusGMainLoop
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import ctypes
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64
 
version = "1.0"
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66
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logger = logging.Logger('mandos')
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syslogger = logging.handlers.SysLogHandler\
68
 
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
69
 
             address = "/dev/log")
 
67
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON)
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syslogger.setFormatter(logging.Formatter\
71
 
                        ('Mandos: %(levelname)s: %(message)s'))
 
69
                        ('%(levelname)s: %(message)s'))
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logger.addHandler(syslogger)
 
71
del syslogger
73
72
 
74
 
console = logging.StreamHandler()
75
 
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
76
 
                                       ' %(message)s'))
77
 
logger.addHandler(console)
78
73
 
79
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class AvahiError(Exception):
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    def __init__(self, value):
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    """
108
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    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
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                 type = None, port = None, TXT = None, domain = "",
110
 
                 host = "", max_renames = 32768):
 
105
                 host = "", max_renames = 12):
111
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        self.interface = interface
112
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        self.name = name
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        self.type = type
119
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        self.domain = domain
120
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        self.host = host
121
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        self.rename_count = 0
122
 
        self.max_renames = max_renames
123
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    def rename(self):
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        """Derived from the Avahi example code"""
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        if self.rename_count >= self.max_renames:
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            logger.critical(u"No suitable service name found after %i"
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                            u" retries, exiting.", rename_count)
128
122
            raise AvahiServiceError("Too many renames")
129
 
        self.name = server.GetAlternativeServiceName(self.name)
130
 
        logger.info(u"Changing name to %r ...", str(self.name))
131
 
        syslogger.setFormatter(logging.Formatter\
132
 
                               ('Mandos (%s): %%(levelname)s:'
133
 
                               ' %%(message)s' % self.name))
 
123
        name = server.GetAlternativeServiceName(name)
 
124
        logger.error(u"Changing name to %r ...", name)
134
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        self.remove()
135
126
        self.add()
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        self.rename_count += 1
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    fingerprint: string (40 or 32 hexadecimal digits); used to
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                 uniquely identify the client
174
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    secret:    bytestring; sent verbatim (over TLS) to client
175
 
    host:      string; available for use by the checker command
 
166
    fqdn:      string (FQDN); available for use by the checker command
176
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    created:   datetime.datetime(); object creation, not client host
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168
    last_checked_ok: datetime.datetime() or None if not yet checked OK
178
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    timeout:   datetime.timedelta(); How long from last_checked_ok
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        else:
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            raise TypeError(u"No secret or secfile for client %s"
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                            % self.name)
242
 
        self.host = config.get("host", "")
 
233
        self.fqdn = config.get("fqdn", "")
243
234
        self.created = datetime.datetime.now()
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        self.last_checked_ok = None
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        self.timeout = string_to_delta(config["timeout"])
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        The possibility that a client might be restarted is left open,
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        but not currently used."""
270
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        # If this client doesn't have a secret, it is already stopped.
271
 
        if hasattr(self, "secret") and self.secret:
 
262
        if self.secret:
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            logger.info(u"Stopping client %s", self.name)
273
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            self.secret = None
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        else:
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        if self.checker is None:
323
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            try:
324
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                # In case check_command has exactly one % operator
325
 
                command = self.check_command % self.host
 
316
                command = self.check_command % self.fqdn
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            except TypeError:
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                # Escape attributes for the shell
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                escaped_attrs = dict((key, re.escape(str(val)))
337
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            try:
338
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                logger.info(u"Starting checker %r for %s",
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                            command, self.name)
340
 
                # We don't need to redirect stdout and stderr, since
341
 
                # in normal mode, that is already done by daemon(),
342
 
                # and in debug mode we don't want to.  (Stdin is
343
 
                # always replaced by /dev/null.)
344
331
                self.checker = subprocess.Popen(command,
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                                                close_fds=True,
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                                                shell=True, cwd="/")
347
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                self.checker_callback_tag = gobject.child_watch_add\
348
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                                            (self.checker.pid,
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                                             self.checker_callback)
350
 
            except OSError, error:
 
337
            except subprocess.OSError, error:
351
338
                logger.error(u"Failed to start subprocess: %s",
352
339
                             error)
353
340
        # Re-run this periodically if run by gobject.timeout_add
359
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            self.checker_callback_tag = None
360
347
        if getattr(self, "checker", None) is None:
361
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            return
362
 
        logger.debug(u"Stopping checker for %(name)s", vars(self))
 
349
        logger.debug("Stopping checker for %(name)s", vars(self))
363
350
        try:
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            os.kill(self.checker.pid, signal.SIGTERM)
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352
            #os.sleep(0.5)
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397
    gnutls.library.functions.gnutls_openpgp_crt_import\
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                    (crt, ctypes.byref(datum),
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                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
413
 
    # Verify the self signature in the key
414
 
    crtverify = ctypes.c_uint();
415
 
    gnutls.library.functions.gnutls_openpgp_crt_verify_self\
416
 
        (crt, ctypes.c_uint(0), ctypes.byref(crtverify))
417
 
    if crtverify.value != 0:
418
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
419
 
        raise gnutls.errors.CertificateSecurityError("Verify failed")
420
400
    # New buffer for the fingerprint
421
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    buffer = ctypes.create_string_buffer(20)
422
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    buffer_length = ctypes.c_size_t()
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528
                in6addr_any = "::"
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                self.server_address = (in6addr_any,
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                                       self.server_address[1])
551
 
            elif not self.server_address[1]:
 
531
            elif self.server_address[1] is None:
552
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                self.server_address = (self.server_address[0],
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                                       0)
554
 
#                 if self.settings["interface"]:
555
 
#                     self.server_address = (self.server_address[0],
556
 
#                                            0, # port
557
 
#                                            0, # flowinfo
558
 
#                                            if_nametoindex
559
 
#                                            (self.settings
560
 
#                                             ["interface"]))
561
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            return super(type(self), self).server_bind()
562
535
 
563
536
 
574
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    datetime.timedelta(1)
575
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    >>> string_to_delta(u'1w')
576
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    datetime.timedelta(7)
577
 
    >>> string_to_delta('5m 30s')
578
 
    datetime.timedelta(0, 330)
579
550
    """
580
 
    timevalue = datetime.timedelta(0)
581
 
    for s in interval.split():
582
 
        try:
583
 
            suffix=unicode(s[-1])
584
 
            value=int(s[:-1])
585
 
            if suffix == u"d":
586
 
                delta = datetime.timedelta(value)
587
 
            elif suffix == u"s":
588
 
                delta = datetime.timedelta(0, value)
589
 
            elif suffix == u"m":
590
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
591
 
            elif suffix == u"h":
592
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
593
 
            elif suffix == u"w":
594
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
595
 
            else:
596
 
                raise ValueError
597
 
        except (ValueError, IndexError):
 
551
    try:
 
552
        suffix=unicode(interval[-1])
 
553
        value=int(interval[:-1])
 
554
        if suffix == u"d":
 
555
            delta = datetime.timedelta(value)
 
556
        elif suffix == u"s":
 
557
            delta = datetime.timedelta(0, value)
 
558
        elif suffix == u"m":
 
559
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
560
        elif suffix == u"h":
 
561
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
562
        elif suffix == u"w":
 
563
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
564
        else:
598
565
            raise ValueError
599
 
        timevalue += delta
600
 
    return timevalue
 
566
    except (ValueError, IndexError):
 
567
        raise ValueError
 
568
    return delta
601
569
 
602
570
 
603
571
def server_state_changed(state):
675
643
    global main_loop_started
676
644
    main_loop_started = False
677
645
    
678
 
    parser = OptionParser(version = "%%prog %s" % version)
 
646
    parser = OptionParser()
679
647
    parser.add_option("-i", "--interface", type="string",
680
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                      metavar="IF", help="Bind to interface IF")
681
649
    parser.add_option("-a", "--address", type="string",
684
652
                      help="Port number to receive requests on")
685
653
    parser.add_option("--check", action="store_true", default=False,
686
654
                      help="Run self-test")
687
 
    parser.add_option("--debug", action="store_true",
 
655
    parser.add_option("--debug", action="store_true", default=False,
688
656
                      help="Debug mode; run in foreground and log to"
689
657
                      " terminal")
690
658
    parser.add_option("--priority", type="string", help="GnuTLS"
716
684
    server_config = ConfigParser.SafeConfigParser(server_defaults)
717
685
    del server_defaults
718
686
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
687
    server_section = "server"
719
688
    # Convert the SafeConfigParser object to a dict
720
 
    server_settings = server_config.defaults()
 
689
    server_settings = dict(server_config.items(server_section))
721
690
    # Use getboolean on the boolean config option
722
691
    server_settings["debug"] = server_config.getboolean\
723
 
                               ("DEFAULT", "debug")
 
692
                               (server_section, "debug")
724
693
    del server_config
725
694
    
726
695
    # Override the settings from the config file with command line
733
702
    del options
734
703
    # Now we have our good server settings in "server_settings"
735
704
    
736
 
    debug = server_settings["debug"]
737
 
    
738
 
    if not debug:
739
 
        syslogger.setLevel(logging.WARNING)
740
 
        console.setLevel(logging.WARNING)
741
 
    
742
 
    if server_settings["servicename"] != "Mandos":
743
 
        syslogger.setFormatter(logging.Formatter\
744
 
                               ('Mandos (%s): %%(levelname)s:'
745
 
                                ' %%(message)s'
746
 
                                % server_settings["servicename"]))
747
 
    
748
705
    # Parse config file with clients
749
706
    client_defaults = { "timeout": "1h",
750
707
                        "interval": "5m",
751
 
                        "checker": "fping -q -- %(host)s",
752
 
                        "host": "",
 
708
                        "checker": "fping -q -- %%(fqdn)s",
753
709
                        }
754
710
    client_config = ConfigParser.SafeConfigParser(client_defaults)
755
711
    client_config.read(os.path.join(server_settings["configdir"],
773
729
            avahi.DBUS_INTERFACE_SERVER )
774
730
    # End of Avahi example code
775
731
    
 
732
    debug = server_settings["debug"]
 
733
    
 
734
    if debug:
 
735
        console = logging.StreamHandler()
 
736
        # console.setLevel(logging.DEBUG)
 
737
        console.setFormatter(logging.Formatter\
 
738
                             ('%(levelname)s: %(message)s'))
 
739
        logger.addHandler(console)
 
740
        del console
 
741
    
776
742
    clients = Set()
777
743
    def remove_from_clients(client):
778
744
        clients.remove(client)
785
751
                              config
786
752
                              = dict(client_config.items(section)))
787
753
                       for section in client_config.sections()))
788
 
    if not clients:
789
 
        logger.critical(u"No clients defined")
790
 
        sys.exit(1)
791
754
    
792
 
    if debug:
793
 
        # Redirect stdin so all checkers get /dev/null
794
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
795
 
        os.dup2(null, sys.stdin.fileno())
796
 
        if null > 2:
797
 
            os.close(null)
798
 
    else:
799
 
        # No console logging
800
 
        logger.removeHandler(console)
801
 
        # Close all input and output, do double fork, etc.
 
755
    if not debug:
802
756
        daemon()
803
757
    
804
 
    pidfilename = "/var/run/mandos/mandos.pid"
805
 
    pid = os.getpid()
806
 
    try:
807
 
        pidfile = open(pidfilename, "w")
808
 
        pidfile.write(str(pid) + "\n")
809
 
        pidfile.close()
810
 
        del pidfile
811
 
    except IOError, err:
812
 
        logger.error(u"Could not write %s file with PID %d",
813
 
                     pidfilename, os.getpid())
814
 
    
815
758
    def cleanup():
816
759
        "Cleanup function; run on exit"
817
760
        global group
863
806
                             tcp_server.handle_request\
864
807
                             (*args[2:], **kwargs) or True)
865
808
        
866
 
        logger.debug(u"Starting main loop")
 
809
        logger.debug("Starting main loop")
867
810
        main_loop_started = True
868
811
        main_loop.run()
869
812
    except AvahiError, error: