/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-monitor

  • Committer: Teddy Hogeborn
  • Date: 2015-03-10 18:03:38 UTC
  • Revision ID: teddy@recompile.se-20150310180338-pcxw6r2qmw9k6br9
Add ":!RSA" to GnuTLS priority string, to disallow non-DHE kx.

If Mandos was somehow made to use a non-ephemeral Diffie-Hellman key
exchange algorithm in the TLS handshake, any saved network traffic
could then be decrypted later if the Mandos client key was obtained.
By default, Mandos uses ephemeral DH key exchanges which does not have
this problem, but a non-ephemeral key exchange algorithm was still
enabled by default.  The simplest solution is to simply turn that off,
which ensures that Mandos will always use ephemeral DH key exchanges.

There is a "PFS" priority string specifier, but we can't use it because:

1. Security-wise, it is a mix between "NORMAL" and "SECURE128" - it
   enables a lot more algorithms than "SECURE256".

2. It is only available since GnuTLS 3.2.4.

Thanks to Andreas Fischer <af@bantuX.org> for reporting this issue.

Show diffs side-by-side

added added

removed removed

Lines of Context:
3
3
4
4
# Mandos Monitor - Control and monitor the Mandos server
5
5
6
 
# Copyright © 2009-2016 Teddy Hogeborn
7
 
# Copyright © 2009-2016 Björn Påhlsson
 
6
# Copyright © 2009-2014 Teddy Hogeborn
 
7
# Copyright © 2009-2014 Björn Påhlsson
8
8
9
9
# This program is free software: you can redistribute it and/or modify
10
10
# it under the terms of the GNU General Public License as published by
40
40
 
41
41
from dbus.mainloop.glib import DBusGMainLoop
42
42
try:
43
 
    from gi.repository import GObject
 
43
    import gobject
44
44
except ImportError:
45
 
    import gobject as GObject
 
45
    from gi.repository import GObject as gobject
46
46
 
47
47
import dbus
48
48
 
60
60
domain = 'se.recompile'
61
61
server_interface = domain + '.Mandos'
62
62
client_interface = domain + '.Mandos.Client'
63
 
version = "1.7.5"
64
 
 
65
 
try:
66
 
    dbus.OBJECT_MANAGER_IFACE
67
 
except AttributeError:
68
 
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
63
version = "1.6.9"
69
64
 
70
65
def isoformat_to_datetime(iso):
71
66
    "Parse an ISO 8601 date string to a datetime.datetime()"
110
105
        It updates the changed properties in the "properties" dict.
111
106
        """
112
107
        # Update properties dict with new value
113
 
        if interface == client_interface:
114
 
            self.properties.update(properties)
 
108
        self.properties.update(properties)
115
109
    
116
110
    def delete(self):
117
111
        self.property_changed_match.remove()
172
166
        """
173
167
        if flag and self._update_timer_callback_tag is None:
174
168
            # Will update the shown timer value every second
175
 
            self._update_timer_callback_tag = (GObject.timeout_add
 
169
            self._update_timer_callback_tag = (gobject.timeout_add
176
170
                                               (1000,
177
171
                                                self.update_timer))
178
172
        elif not (flag or self._update_timer_callback_tag is None):
179
 
            GObject.source_remove(self._update_timer_callback_tag)
 
173
            gobject.source_remove(self._update_timer_callback_tag)
180
174
            self._update_timer_callback_tag = None
181
175
    
182
176
    def checker_completed(self, exitstatus, condition, command):
197
191
                        ' killed by signal {}'
198
192
                        .format(self.properties["Name"], command,
199
193
                                os.WTERMSIG(condition)))
 
194
        elif os.WCOREDUMP(condition):
 
195
            self.logger('Checker for client {} (command "{}") dumped'
 
196
                        ' core'.format(self.properties["Name"],
 
197
                                       command))
 
198
        else:
 
199
            self.logger('Checker for client {} completed'
 
200
                        ' mysteriously'
 
201
                        .format(self.properties["Name"]))
200
202
        self.update()
201
203
    
202
204
    def checker_started(self, command):
309
311
            self.update_hook()
310
312
    
311
313
    def update_timer(self):
312
 
        """called by GObject. Will indefinitely loop until
313
 
        GObject.source_remove() on tag is called"""
 
314
        """called by gobject. Will indefinitely loop until
 
315
        gobject.source_remove() on tag is called"""
314
316
        self.update()
315
317
        return True             # Keep calling this
316
318
    
317
319
    def delete(self, **kwargs):
318
320
        if self._update_timer_callback_tag is not None:
319
 
            GObject.source_remove(self._update_timer_callback_tag)
 
321
            gobject.source_remove(self._update_timer_callback_tag)
320
322
            self._update_timer_callback_tag = None
321
323
        for match in self.match_objects:
322
324
            match.remove()
335
337
        """Handle keys.
336
338
        This overrides the method from urwid.FlowWidget"""
337
339
        if key == "+":
338
 
            self.proxy.Set(client_interface, "Enabled",
339
 
                           dbus.Boolean(True), ignore_reply = True,
340
 
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
340
            self.proxy.Enable(dbus_interface = client_interface,
 
341
                              ignore_reply=True)
341
342
        elif key == "-":
342
 
            self.proxy.Set(client_interface, "Enabled", False,
343
 
                           ignore_reply = True,
344
 
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
343
            self.proxy.Disable(dbus_interface = client_interface,
 
344
                               ignore_reply=True)
345
345
        elif key == "a":
346
346
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
347
347
                               dbus_interface = client_interface,
355
355
                                                  .object_path,
356
356
                                                  ignore_reply=True)
357
357
        elif key == "s":
358
 
            self.proxy.Set(client_interface, "CheckerRunning",
359
 
                           dbus.Boolean(True), ignore_reply = True,
360
 
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
358
            self.proxy.StartChecker(dbus_interface = client_interface,
 
359
                                    ignore_reply=True)
361
360
        elif key == "S":
362
 
            self.proxy.Set(client_interface, "CheckerRunning",
363
 
                           dbus.Boolean(False), ignore_reply = True,
364
 
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
361
            self.proxy.StopChecker(dbus_interface = client_interface,
 
362
                                   ignore_reply=True)
365
363
        elif key == "C":
366
364
            self.proxy.CheckedOK(dbus_interface = client_interface,
367
365
                                 ignore_reply=True)
465
463
                              "q: Quit  ?: Help"))
466
464
        
467
465
        self.busname = domain + '.Mandos'
468
 
        self.main_loop = GObject.MainLoop()
 
466
        self.main_loop = gobject.MainLoop()
469
467
    
470
468
    def client_not_found(self, fingerprint, address):
471
469
        self.log_message("Client with address {} and fingerprint {}"
527
525
        self.log_message("Wrap mode: {}".format(self.log_wrap),
528
526
                         level=0)
529
527
    
530
 
    def find_and_remove_client(self, path, interfaces):
 
528
    def find_and_remove_client(self, path, name):
531
529
        """Find a client by its object path and remove it.
532
530
        
533
 
        This is connected to the InterfacesRemoved signal from the
 
531
        This is connected to the ClientRemoved signal from the
534
532
        Mandos server object."""
535
 
        if client_interface not in interfaces:
536
 
            # Not a Mandos client object; ignore
537
 
            return
538
533
        try:
539
534
            client = self.clients_dict[path]
540
535
        except KeyError:
541
536
            # not found?
542
 
            self.log_message("Unknown client {!r} removed"
543
 
                             .format(path))
 
537
            self.log_message("Unknown client {!r} ({!r}) removed"
 
538
                             .format(name, path))
544
539
            return
545
540
        client.delete()
546
541
    
547
 
    def add_new_client(self, path, ifs_and_props):
548
 
        """Find a client by its object path and remove it.
549
 
        
550
 
        This is connected to the InterfacesAdded signal from the
551
 
        Mandos server object.
552
 
        """
553
 
        if client_interface not in ifs_and_props:
554
 
            # Not a Mandos client object; ignore
555
 
            return
 
542
    def add_new_client(self, path):
556
543
        client_proxy_object = self.bus.get_object(self.busname, path)
557
544
        self.add_client(MandosClientWidget(server_proxy_object
558
545
                                           =self.mandos_serv,
563
550
                                           delete_hook
564
551
                                           =self.remove_client,
565
552
                                           logger
566
 
                                           =self.log_message,
567
 
                                           properties
568
 
                                           = dict(ifs_and_props[
569
 
                                               client_interface])),
 
553
                                           =self.log_message),
570
554
                        path=path)
571
555
    
572
556
    def add_client(self, client, path=None):
607
591
            mandos_clients = dbus.Dictionary()
608
592
        
609
593
        (self.mandos_serv
610
 
         .connect_to_signal("InterfacesRemoved",
 
594
         .connect_to_signal("ClientRemoved",
611
595
                            self.find_and_remove_client,
612
 
                            dbus_interface
613
 
                            = dbus.OBJECT_MANAGER_IFACE,
 
596
                            dbus_interface=server_interface,
614
597
                            byte_arrays=True))
615
598
        (self.mandos_serv
616
 
         .connect_to_signal("InterfacesAdded",
 
599
         .connect_to_signal("ClientAdded",
617
600
                            self.add_new_client,
618
 
                            dbus_interface
619
 
                            = dbus.OBJECT_MANAGER_IFACE,
 
601
                            dbus_interface=server_interface,
620
602
                            byte_arrays=True))
621
603
        (self.mandos_serv
622
604
         .connect_to_signal("ClientNotFound",
640
622
                            path=path)
641
623
        
642
624
        self.refresh()
643
 
        self._input_callback_tag = (GObject.io_add_watch
 
625
        self._input_callback_tag = (gobject.io_add_watch
644
626
                                    (sys.stdin.fileno(),
645
 
                                     GObject.IO_IN,
 
627
                                     gobject.IO_IN,
646
628
                                     self.process_input))
647
629
        self.main_loop.run()
648
630
        # Main loop has finished, we should close everything now
649
 
        GObject.source_remove(self._input_callback_tag)
 
631
        gobject.source_remove(self._input_callback_tag)
650
632
        self.screen.stop()
651
633
    
652
634
    def stop(self):