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  • Committer: Teddy Hogeborn
  • Date: 2015-03-10 18:52:09 UTC
  • Revision ID: teddy@recompile.se-20150310185209-lxuovbu09zwyk9bx
Automatically determine the number of DH bits in the TLS handshake.

Instead of using a default value of 1024, check the OpenPGP key and
determine an appropriate number of DH bits to use, (using GnuTLS
functions made for this).  Document this new default behavior.

* plugins.d/mandos-client.c (safe_string): New function.
  (init_gnutls_global): If not specified, determine the number of DH
                        bits to use, based on the OpenPGP key.
* plugins.d/mandos-client.xml (OPTIONS): Document this new default of
                                         the --dh-bits option.

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

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Lines of Context:
mandos-monitor
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# 
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# Mandos Monitor - Control and monitor the Mandos server
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# 
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# Copyright © 2009-2013 Teddy Hogeborn
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# Copyright © 2009-2013 Björn Påhlsson
 
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# Copyright © 2009-2014 Teddy Hogeborn
 
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# Copyright © 2009-2014 Björn Påhlsson
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# 
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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import sys
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import os
35
 
import signal
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import datetime
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import locale
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52
 
if sys.version_info[0] == 2:
 
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if sys.version_info.major == 2:
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    str = unicode
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locale.setlocale(locale.LC_ALL, '')
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domain = 'se.recompile'
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server_interface = domain + '.Mandos'
63
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client_interface = domain + '.Mandos.Client'
64
 
version = "1.6.3"
 
63
version = "1.6.9"
65
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66
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def isoformat_to_datetime(iso):
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    "Parse an ISO 8601 date string to a datetime.datetime()"
88
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        self.proxy = proxy_object # Mandos Client proxy object
89
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        self.properties = dict() if properties is None else properties
90
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        self.property_changed_match = (
91
 
            self.proxy.connect_to_signal("PropertyChanged",
92
 
                                         self._property_changed,
93
 
                                         client_interface,
 
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            self.proxy.connect_to_signal("PropertiesChanged",
 
91
                                         self.properties_changed,
 
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                                         dbus.PROPERTIES_IFACE,
94
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                                         byte_arrays=True))
95
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96
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        if properties is None:
101
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102
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        super(MandosClientPropertyCache, self).__init__(**kwargs)
103
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104
 
    def _property_changed(self, property, value):
105
 
        """Helper which takes positional arguments"""
106
 
        return self.property_changed(property=property, value=value)
107
 
    
108
 
    def property_changed(self, property=None, value=None):
109
 
        """This is called whenever we get a PropertyChanged signal
110
 
        It updates the changed property in the "properties" dict.
 
103
    def properties_changed(self, interface, properties, invalidated):
 
104
        """This is called whenever we get a PropertiesChanged signal
 
105
        It updates the changed properties in the "properties" dict.
111
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        """
112
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        # Update properties dict with new value
113
 
        self.properties[property] = value
 
108
        self.properties.update(properties)
114
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115
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    def delete(self):
116
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        self.property_changed_match.remove()
162
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                                         self.rejected,
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                                         client_interface,
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                                         byte_arrays=True))
165
 
        #self.logger('Created client {0}'
166
 
        #            .format(self.properties["Name"]))
 
160
        self.logger('Created client {}'
 
161
                    .format(self.properties["Name"]), level=0)
167
162
    
168
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    def using_timer(self, flag):
169
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        """Call this method with True or False when timer should be
180
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    def checker_completed(self, exitstatus, condition, command):
182
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        if exitstatus == 0:
 
178
            self.logger('Checker for client {} (command "{}")'
 
179
                        ' succeeded'.format(self.properties["Name"],
 
180
                                            command), level=0)
183
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            self.update()
184
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            return
185
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        # Checker failed
186
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        if os.WIFEXITED(condition):
187
 
            self.logger('Checker for client {0} (command "{1}")'
188
 
                        ' failed with exit code {2}'
 
185
            self.logger('Checker for client {} (command "{}") failed'
 
186
                        ' with exit code {}'
189
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                        .format(self.properties["Name"], command,
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                                os.WEXITSTATUS(condition)))
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        elif os.WIFSIGNALED(condition):
192
 
            self.logger('Checker for client {0} (command "{1}") was'
193
 
                        ' killed by signal {2}'
 
190
            self.logger('Checker for client {} (command "{}") was'
 
191
                        ' killed by signal {}'
194
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                        .format(self.properties["Name"], command,
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                                os.WTERMSIG(condition)))
196
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        elif os.WCOREDUMP(condition):
197
 
            self.logger('Checker for client {0} (command "{1}")'
198
 
                        ' dumped core'
199
 
                        .format(self.properties["Name"], command))
 
195
            self.logger('Checker for client {} (command "{}") dumped'
 
196
                        ' core'.format(self.properties["Name"],
 
197
                                       command))
200
198
        else:
201
 
            self.logger('Checker for client {0} completed'
 
199
            self.logger('Checker for client {} completed'
202
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                        ' mysteriously'
203
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                        .format(self.properties["Name"]))
204
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        self.update()
205
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206
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    def checker_started(self, command):
207
 
        """Server signals that a checker started. This could be useful
208
 
           to log in the future. """
209
 
        #self.logger('Client {0} started checker "{1}"'
210
 
        #            .format(self.properties["Name"],
211
 
        #                    str(command)))
212
 
        pass
 
205
        """Server signals that a checker started."""
 
206
        self.logger('Client {} started checker "{}"'
 
207
                    .format(self.properties["Name"],
 
208
                            command), level=0)
213
209
    
214
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    def got_secret(self):
215
 
        self.logger('Client {0} received its secret'
 
211
        self.logger('Client {} received its secret'
216
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                    .format(self.properties["Name"]))
217
213
    
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    def need_approval(self, timeout, default):
219
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        if not default:
220
 
            message = 'Client {0} needs approval within {1} seconds'
 
216
            message = 'Client {} needs approval within {} seconds'
221
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        else:
222
 
            message = 'Client {0} will get its secret in {1} seconds'
 
218
            message = 'Client {} will get its secret in {} seconds'
223
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        self.logger(message.format(self.properties["Name"],
224
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                                   timeout/1000))
225
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    def rejected(self, reason):
227
 
        self.logger('Client {0} was rejected; reason: {1}'
 
223
        self.logger('Client {} was rejected; reason: {}'
228
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                    .format(self.properties["Name"], reason))
229
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    def selectable(self):
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            else:
275
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                timer = datetime.timedelta()
276
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            if self.properties["ApprovedByDefault"]:
277
 
                message = "Approval in {0}. (d)eny?"
 
273
                message = "Approval in {}. (d)eny?"
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            else:
279
 
                message = "Denial in {0}. (a)pprove?"
 
275
                message = "Denial in {}. (a)pprove?"
280
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            message = message.format(str(timer).rsplit(".", 1)[0])
281
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            self.using_timer(True)
282
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        elif self.properties["LastCheckerStatus"] != 0:
290
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                timer = max(expires - datetime.datetime.utcnow(),
291
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                            datetime.timedelta())
292
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            message = ('A checker has failed! Time until client'
293
 
                       ' gets disabled: {0}'
 
289
                       ' gets disabled: {}'
294
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                       .format(str(timer).rsplit(".", 1)[0]))
295
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            self.using_timer(True)
296
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        else:
297
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            message = "enabled"
298
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            self.using_timer(False)
299
 
        self._text = "{0}{1}".format(base, message)
 
295
        self._text = "{}{}".format(base, message)
300
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301
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        if not urwid.supports_unicode():
302
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            self._text = self._text.encode("ascii", "replace")
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        else:
378
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            return key
379
375
    
380
 
    def property_changed(self, property=None, **kwargs):
381
 
        """Call self.update() if old value is not new value.
 
376
    def properties_changed(self, interface, properties, invalidated):
 
377
        """Call self.update() if any properties changed.
382
378
        This overrides the method from MandosClientPropertyCache"""
383
 
        property_name = str(property)
384
 
        old_value = self.properties.get(property_name)
385
 
        super(MandosClientWidget, self).property_changed(
386
 
            property=property, **kwargs)
387
 
        if self.properties.get(property_name) != old_value:
 
379
        old_values = { key: self.properties.get(key)
 
380
                       for key in properties.keys() }
 
381
        super(MandosClientWidget, self).properties_changed(
 
382
            interface, properties, invalidated)
 
383
        if any(old_values[key] != self.properties.get(key)
 
384
               for key in old_values):
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            self.update()
389
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390
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    """This is the entire user interface - the whole screen
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    with boxes, lists of client widgets, etc.
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    """
407
 
    def __init__(self, max_log_length=1000):
 
404
    def __init__(self, max_log_length=1000, log_level=1):
408
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        DBusGMainLoop(set_as_default=True)
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        self.screen = urwid.curses_display.Screen()
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        self.log = []
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        self.max_log_length = max_log_length
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448
        self.log_level = log_level
 
449
        
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        # We keep a reference to the log widget so we can remove it
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        # from the ListWalker without it getting destroyed
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        self.logbox = ConstrainedListBox(self.log)
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        self.main_loop = gobject.MainLoop()
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    def client_not_found(self, fingerprint, address):
470
 
        self.log_message("Client with address {0} and fingerprint"
471
 
                         " {1} could not be found"
 
469
        self.log_message("Client with address {} and fingerprint {}"
 
470
                         " could not be found"
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                         .format(address, fingerprint))
473
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    def rebuild(self):
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            self.uilist.append(self.logbox)
488
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        self.topwidget = urwid.Pile(self.uilist)
489
488
    
490
 
    def log_message(self, message):
 
489
    def log_message(self, message, level=1):
491
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        """Log message formatted with timestamp"""
 
491
        if level < self.log_level:
 
492
            return
492
493
        timestamp = datetime.datetime.now().isoformat()
493
 
        self.log_message_raw(timestamp + ": " + message)
 
494
        self.log_message_raw("{}: {}".format(timestamp, message),
 
495
                             level=level)
494
496
    
495
 
    def log_message_raw(self, markup):
 
497
    def log_message_raw(self, markup, level=1):
496
498
        """Add a log message to the log buffer."""
 
499
        if level < self.log_level:
 
500
            return
497
501
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
498
502
        if (self.max_log_length
499
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            and len(self.log) > self.max_log_length):
506
510
        """Toggle visibility of the log buffer."""
507
511
        self.log_visible = not self.log_visible
508
512
        self.rebuild()
509
 
        #self.log_message("Log visibility changed to: "
510
 
        #                 + str(self.log_visible))
 
513
        self.log_message("Log visibility changed to: {}"
 
514
                         .format(self.log_visible), level=0)
511
515
    
512
516
    def change_log_display(self):
513
517
        """Change type of log display.
518
522
            self.log_wrap = "clip"
519
523
        for textwidget in self.log:
520
524
            textwidget.set_wrap_mode(self.log_wrap)
521
 
        #self.log_message("Wrap mode: " + self.log_wrap)
 
525
        self.log_message("Wrap mode: {}".format(self.log_wrap),
 
526
                         level=0)
522
527
    
523
528
    def find_and_remove_client(self, path, name):
524
529
        """Find a client by its object path and remove it.
529
534
            client = self.clients_dict[path]
530
535
        except KeyError:
531
536
            # not found?
532
 
            self.log_message("Unknown client {0!r} ({1!r}) removed"
 
537
            self.log_message("Unknown client {!r} ({!r}) removed"
533
538
                             .format(name, path))
534
539
            return
535
540
        client.delete()
653
658
            elif key == "window resize":
654
659
                self.size = self.screen.get_cols_rows()
655
660
                self.refresh()
656
 
            elif key == "\f":  # Ctrl-L
 
661
            elif key == "ctrl l":
 
662
                self.screen.clear()
657
663
                self.refresh()
658
664
            elif key == "l" or key == "D":
659
665
                self.toggle_log_display()
671
677
                                            "?: Help",
672
678
                                            "l: Log window toggle",
673
679
                                            "TAB: Switch window",
674
 
                                            "w: Wrap (log)"))))
 
680
                                            "w: Wrap (log lines)",
 
681
                                            "v: Toggle verbose log",
 
682
                                            ))))
675
683
                self.log_message_raw(("bold",
676
684
                                      "  "
677
685
                                      .join(("Clients:",
690
698
                else:
691
699
                    self.topwidget.set_focus(self.logbox)
692
700
                self.refresh()
 
701
            elif key == "v":
 
702
                if self.log_level == 0:
 
703
                    self.log_level = 1
 
704
                    self.log_message("Verbose mode: Off")
 
705
                else:
 
706
                    self.log_level = 0
 
707
                    self.log_message("Verbose mode: On")
693
708
            #elif (key == "end" or key == "meta >" or key == "G"
694
709
            #      or key == ">"):
695
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            #    pass            # xxx end-of-buffer