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  • Committer: Teddy Hogeborn
  • Date: 2016-02-28 10:59:18 UTC
  • Revision ID: teddy@recompile.se-20160228105918-tb8pt2p5j0tkcls3
Handle GnuTLS errors and partial sends in gnutls "module".

* mandos (GnuTLS.E_INTERRUPTED, GnuTLS.E_AGAIN): New.
  (GnuTLS.Error): Set error code as "code" attribute.
  (GnuTLS.ClientSession.send): Handle partial sends with a loop.
  (GnuTLS._retry_on_error): New function.
  (GnuTLS.record_send, GnuTLS.handshake, GnuTLS.bye): Set "errcheck"
                                                      attribute to
                                                    "_retry_on_error".
  (ClientHandler.handle): Remove loop for handling partial sends;
                          GnuTLS.ClientSession.send() will do that.

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Lines of Context:
mandos-monitor
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3
# 
4
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# Mandos Monitor - Control and monitor the Mandos server
5
5
# 
6
 
# Copyright © 2009-2012 Teddy Hogeborn
7
 
# Copyright © 2009-2012 Björn Påhlsson
 
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# Copyright © 2009-2015 Teddy Hogeborn
 
7
# Copyright © 2009-2015 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
25
25
 
26
26
from __future__ import (division, absolute_import, print_function,
27
27
                        unicode_literals)
28
 
 
29
 
from future_builtins import *
 
28
try:
 
29
    from future_builtins import *
 
30
except ImportError:
 
31
    pass
30
32
 
31
33
import sys
32
34
import os
33
 
import signal
34
35
 
35
36
import datetime
36
37
 
38
39
import urwid
39
40
 
40
41
from dbus.mainloop.glib import DBusGMainLoop
41
 
import gobject
 
42
try:
 
43
    import gobject
 
44
except ImportError:
 
45
    from gi.repository import GObject as gobject
42
46
 
43
47
import dbus
44
48
 
45
 
import UserList
46
 
 
47
49
import locale
48
50
 
 
51
if sys.version_info.major == 2:
 
52
    str = unicode
 
53
 
49
54
locale.setlocale(locale.LC_ALL, '')
50
55
 
51
56
import logging
55
60
domain = 'se.recompile'
56
61
server_interface = domain + '.Mandos'
57
62
client_interface = domain + '.Mandos.Client'
58
 
version = "1.6.0"
59
 
 
60
 
# Always run in monochrome mode
61
 
urwid.curses_display.curses.has_colors = lambda : False
62
 
 
63
 
# Urwid doesn't support blinking, but we want it.  Since we have no
64
 
# use for underline on its own, we make underline also always blink.
65
 
urwid.curses_display.curses.A_UNDERLINE |= (
66
 
    urwid.curses_display.curses.A_BLINK)
 
63
version = "1.7.1"
 
64
 
 
65
try:
 
66
    dbus.OBJECT_MANAGER_IFACE
 
67
except AttributeError:
 
68
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
67
69
 
68
70
def isoformat_to_datetime(iso):
69
71
    "Parse an ISO 8601 date string to a datetime.datetime()"
90
92
        self.proxy = proxy_object # Mandos Client proxy object
91
93
        self.properties = dict() if properties is None else properties
92
94
        self.property_changed_match = (
93
 
            self.proxy.connect_to_signal("PropertyChanged",
94
 
                                         self._property_changed,
95
 
                                         client_interface,
 
95
            self.proxy.connect_to_signal("PropertiesChanged",
 
96
                                         self.properties_changed,
 
97
                                         dbus.PROPERTIES_IFACE,
96
98
                                         byte_arrays=True))
97
99
        
98
100
        if properties is None:
103
105
        
104
106
        super(MandosClientPropertyCache, self).__init__(**kwargs)
105
107
    
106
 
    def _property_changed(self, property, value):
107
 
        """Helper which takes positional arguments"""
108
 
        return self.property_changed(property=property, value=value)
109
 
    
110
 
    def property_changed(self, property=None, value=None):
111
 
        """This is called whenever we get a PropertyChanged signal
112
 
        It updates the changed property in the "properties" dict.
 
108
    def properties_changed(self, interface, properties, invalidated):
 
109
        """This is called whenever we get a PropertiesChanged signal
 
110
        It updates the changed properties in the "properties" dict.
113
111
        """
114
112
        # Update properties dict with new value
115
 
        self.properties[property] = value
 
113
        if interface == client_interface:
 
114
            self.properties.update(properties)
116
115
    
117
116
    def delete(self):
118
117
        self.property_changed_match.remove()
164
163
                                         self.rejected,
165
164
                                         client_interface,
166
165
                                         byte_arrays=True))
167
 
        #self.logger('Created client {0}'
168
 
        #            .format(self.properties["Name"]))
 
166
        self.logger('Created client {}'
 
167
                    .format(self.properties["Name"]), level=0)
169
168
    
170
169
    def using_timer(self, flag):
171
170
        """Call this method with True or False when timer should be
182
181
    
183
182
    def checker_completed(self, exitstatus, condition, command):
184
183
        if exitstatus == 0:
 
184
            self.logger('Checker for client {} (command "{}")'
 
185
                        ' succeeded'.format(self.properties["Name"],
 
186
                                            command), level=0)
185
187
            self.update()
186
188
            return
187
189
        # Checker failed
188
190
        if os.WIFEXITED(condition):
189
 
            self.logger('Checker for client {0} (command "{1}")'
190
 
                        ' failed with exit code {2}'
 
191
            self.logger('Checker for client {} (command "{}") failed'
 
192
                        ' with exit code {}'
191
193
                        .format(self.properties["Name"], command,
192
194
                                os.WEXITSTATUS(condition)))
193
195
        elif os.WIFSIGNALED(condition):
194
 
            self.logger('Checker for client {0} (command "{1}") was'
195
 
                        ' killed by signal {2}'
 
196
            self.logger('Checker for client {} (command "{}") was'
 
197
                        ' killed by signal {}'
196
198
                        .format(self.properties["Name"], command,
197
199
                                os.WTERMSIG(condition)))
198
 
        elif os.WCOREDUMP(condition):
199
 
            self.logger('Checker for client {0} (command "{1}")'
200
 
                        ' dumped core'
201
 
                        .format(self.properties["Name"], command))
202
 
        else:
203
 
            self.logger('Checker for client {0} completed'
204
 
                        ' mysteriously'
205
 
                        .format(self.properties["Name"]))
206
200
        self.update()
207
201
    
208
202
    def checker_started(self, command):
209
 
        """Server signals that a checker started. This could be useful
210
 
           to log in the future. """
211
 
        #self.logger('Client {0} started checker "{1}"'
212
 
        #            .format(self.properties["Name"],
213
 
        #                    unicode(command)))
214
 
        pass
 
203
        """Server signals that a checker started."""
 
204
        self.logger('Client {} started checker "{}"'
 
205
                    .format(self.properties["Name"],
 
206
                            command), level=0)
215
207
    
216
208
    def got_secret(self):
217
 
        self.logger('Client {0} received its secret'
 
209
        self.logger('Client {} received its secret'
218
210
                    .format(self.properties["Name"]))
219
211
    
220
212
    def need_approval(self, timeout, default):
221
213
        if not default:
222
 
            message = 'Client {0} needs approval within {1} seconds'
 
214
            message = 'Client {} needs approval within {} seconds'
223
215
        else:
224
 
            message = 'Client {0} will get its secret in {1} seconds'
 
216
            message = 'Client {} will get its secret in {} seconds'
225
217
        self.logger(message.format(self.properties["Name"],
226
218
                                   timeout/1000))
227
219
    
228
220
    def rejected(self, reason):
229
 
        self.logger('Client {0} was rejected; reason: {1}'
 
221
        self.logger('Client {} was rejected; reason: {}'
230
222
                    .format(self.properties["Name"], reason))
231
223
    
232
224
    def selectable(self):
276
268
            else:
277
269
                timer = datetime.timedelta()
278
270
            if self.properties["ApprovedByDefault"]:
279
 
                message = "Approval in {0}. (d)eny?"
 
271
                message = "Approval in {}. (d)eny?"
280
272
            else:
281
 
                message = "Denial in {0}. (a)pprove?"
282
 
            message = message.format(unicode(timer).rsplit(".", 1)[0])
 
273
                message = "Denial in {}. (a)pprove?"
 
274
            message = message.format(str(timer).rsplit(".", 1)[0])
283
275
            self.using_timer(True)
284
276
        elif self.properties["LastCheckerStatus"] != 0:
285
277
            # When checker has failed, show timer until client expires
292
284
                timer = max(expires - datetime.datetime.utcnow(),
293
285
                            datetime.timedelta())
294
286
            message = ('A checker has failed! Time until client'
295
 
                       ' gets disabled: {0}'
296
 
                       .format(unicode(timer).rsplit(".", 1)[0]))
 
287
                       ' gets disabled: {}'
 
288
                       .format(str(timer).rsplit(".", 1)[0]))
297
289
            self.using_timer(True)
298
290
        else:
299
291
            message = "enabled"
300
292
            self.using_timer(False)
301
 
        self._text = "{0}{1}".format(base, message)
 
293
        self._text = "{}{}".format(base, message)
302
294
        
303
295
        if not urwid.supports_unicode():
304
296
            self._text = self._text.encode("ascii", "replace")
343
335
        """Handle keys.
344
336
        This overrides the method from urwid.FlowWidget"""
345
337
        if key == "+":
346
 
            self.proxy.Enable(dbus_interface = client_interface,
347
 
                              ignore_reply=True)
 
338
            self.proxy.Set(client_interface, "Enabled",
 
339
                           dbus.Boolean(True), ignore_reply = True,
 
340
                           dbus_interface = dbus.PROPERTIES_IFACE)
348
341
        elif key == "-":
349
 
            self.proxy.Disable(dbus_interface = client_interface,
350
 
                               ignore_reply=True)
 
342
            self.proxy.Set(client_interface, "Enabled", False,
 
343
                           ignore_reply = True,
 
344
                           dbus_interface = dbus.PROPERTIES_IFACE)
351
345
        elif key == "a":
352
346
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
353
347
                               dbus_interface = client_interface,
361
355
                                                  .object_path,
362
356
                                                  ignore_reply=True)
363
357
        elif key == "s":
364
 
            self.proxy.StartChecker(dbus_interface = client_interface,
365
 
                                    ignore_reply=True)
 
358
            self.proxy.Set(client_interface, "CheckerRunning",
 
359
                           dbus.Boolean(True), ignore_reply = True,
 
360
                           dbus_interface = dbus.PROPERTIES_IFACE)
366
361
        elif key == "S":
367
 
            self.proxy.StopChecker(dbus_interface = client_interface,
368
 
                                   ignore_reply=True)
 
362
            self.proxy.Set(client_interface, "CheckerRunning",
 
363
                           dbus.Boolean(False), ignore_reply = True,
 
364
                           dbus_interface = dbus.PROPERTIES_IFACE)
369
365
        elif key == "C":
370
366
            self.proxy.CheckedOK(dbus_interface = client_interface,
371
367
                                 ignore_reply=True)
379
375
        else:
380
376
            return key
381
377
    
382
 
    def property_changed(self, property=None, **kwargs):
383
 
        """Call self.update() if old value is not new value.
 
378
    def properties_changed(self, interface, properties, invalidated):
 
379
        """Call self.update() if any properties changed.
384
380
        This overrides the method from MandosClientPropertyCache"""
385
 
        property_name = unicode(property)
386
 
        old_value = self.properties.get(property_name)
387
 
        super(MandosClientWidget, self).property_changed(
388
 
            property=property, **kwargs)
389
 
        if self.properties.get(property_name) != old_value:
 
381
        old_values = { key: self.properties.get(key)
 
382
                       for key in properties.keys() }
 
383
        super(MandosClientWidget, self).properties_changed(
 
384
            interface, properties, invalidated)
 
385
        if any(old_values[key] != self.properties.get(key)
 
386
               for key in old_values):
390
387
            self.update()
391
388
 
392
389
 
406
403
    """This is the entire user interface - the whole screen
407
404
    with boxes, lists of client widgets, etc.
408
405
    """
409
 
    def __init__(self, max_log_length=1000):
 
406
    def __init__(self, max_log_length=1000, log_level=1):
410
407
        DBusGMainLoop(set_as_default=True)
411
408
        
412
409
        self.screen = urwid.curses_display.Screen()
415
412
                ("normal",
416
413
                 "default", "default", None),
417
414
                ("bold",
418
 
                 "default", "default", "bold"),
 
415
                 "bold", "default", "bold"),
419
416
                ("underline-blink",
420
 
                 "default", "default", "underline"),
 
417
                 "underline,blink", "default", "underline,blink"),
421
418
                ("standout",
422
 
                 "default", "default", "standout"),
 
419
                 "standout", "default", "standout"),
423
420
                ("bold-underline-blink",
424
 
                 "default", "default", ("bold", "underline")),
 
421
                 "bold,underline,blink", "default", "bold,underline,blink"),
425
422
                ("bold-standout",
426
 
                 "default", "default", ("bold", "standout")),
 
423
                 "bold,standout", "default", "bold,standout"),
427
424
                ("underline-blink-standout",
428
 
                 "default", "default", ("underline", "standout")),
 
425
                 "underline,blink,standout", "default",
 
426
                 "underline,blink,standout"),
429
427
                ("bold-underline-blink-standout",
430
 
                 "default", "default", ("bold", "underline",
431
 
                                          "standout")),
 
428
                 "bold,underline,blink,standout", "default",
 
429
                 "bold,underline,blink,standout"),
432
430
                ))
433
431
        
434
432
        if urwid.supports_unicode():
449
447
        self.log = []
450
448
        self.max_log_length = max_log_length
451
449
        
 
450
        self.log_level = log_level
 
451
        
452
452
        # We keep a reference to the log widget so we can remove it
453
453
        # from the ListWalker without it getting destroyed
454
454
        self.logbox = ConstrainedListBox(self.log)
468
468
        self.main_loop = gobject.MainLoop()
469
469
    
470
470
    def client_not_found(self, fingerprint, address):
471
 
        self.log_message("Client with address {0} and fingerprint"
472
 
                         " {1} could not be found"
 
471
        self.log_message("Client with address {} and fingerprint {}"
 
472
                         " could not be found"
473
473
                         .format(address, fingerprint))
474
474
    
475
475
    def rebuild(self):
488
488
            self.uilist.append(self.logbox)
489
489
        self.topwidget = urwid.Pile(self.uilist)
490
490
    
491
 
    def log_message(self, message):
 
491
    def log_message(self, message, level=1):
 
492
        """Log message formatted with timestamp"""
 
493
        if level < self.log_level:
 
494
            return
492
495
        timestamp = datetime.datetime.now().isoformat()
493
 
        self.log_message_raw(timestamp + ": " + message)
 
496
        self.log_message_raw("{}: {}".format(timestamp, message),
 
497
                             level=level)
494
498
    
495
 
    def log_message_raw(self, markup):
 
499
    def log_message_raw(self, markup, level=1):
496
500
        """Add a log message to the log buffer."""
 
501
        if level < self.log_level:
 
502
            return
497
503
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
498
504
        if (self.max_log_length
499
505
            and len(self.log) > self.max_log_length):
506
512
        """Toggle visibility of the log buffer."""
507
513
        self.log_visible = not self.log_visible
508
514
        self.rebuild()
509
 
        #self.log_message("Log visibility changed to: "
510
 
        #                 + unicode(self.log_visible))
 
515
        self.log_message("Log visibility changed to: {}"
 
516
                         .format(self.log_visible), level=0)
511
517
    
512
518
    def change_log_display(self):
513
519
        """Change type of log display.
518
524
            self.log_wrap = "clip"
519
525
        for textwidget in self.log:
520
526
            textwidget.set_wrap_mode(self.log_wrap)
521
 
        #self.log_message("Wrap mode: " + self.log_wrap)
 
527
        self.log_message("Wrap mode: {}".format(self.log_wrap),
 
528
                         level=0)
522
529
    
523
 
    def find_and_remove_client(self, path, name):
 
530
    def find_and_remove_client(self, path, interfaces):
524
531
        """Find a client by its object path and remove it.
525
532
        
526
 
        This is connected to the ClientRemoved signal from the
 
533
        This is connected to the InterfacesRemoved signal from the
527
534
        Mandos server object."""
 
535
        if client_interface not in interfaces:
 
536
            # Not a Mandos client object; ignore
 
537
            return
528
538
        try:
529
539
            client = self.clients_dict[path]
530
540
        except KeyError:
531
541
            # not found?
532
 
            self.log_message("Unknown client {0!r} ({1!r}) removed"
533
 
                             .format(name, path))
 
542
            self.log_message("Unknown client {!r} removed"
 
543
                             .format(path))
534
544
            return
535
545
        client.delete()
536
546
    
537
 
    def add_new_client(self, path):
 
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
538
556
        client_proxy_object = self.bus.get_object(self.busname, path)
539
557
        self.add_client(MandosClientWidget(server_proxy_object
540
558
                                           =self.mandos_serv,
545
563
                                           delete_hook
546
564
                                           =self.remove_client,
547
565
                                           logger
548
 
                                           =self.log_message),
 
566
                                           =self.log_message,
 
567
                                           properties
 
568
                                           = dict(ifs_and_props[
 
569
                                               client_interface])),
549
570
                        path=path)
550
571
    
551
572
    def add_client(self, client, path=None):
553
574
        if path is None:
554
575
            path = client.proxy.object_path
555
576
        self.clients_dict[path] = client
556
 
        self.clients.sort(None, lambda c: c.properties["Name"])
 
577
        self.clients.sort(key=lambda c: c.properties["Name"])
557
578
        self.refresh()
558
579
    
559
580
    def remove_client(self, client, path=None):
561
582
        if path is None:
562
583
            path = client.proxy.object_path
563
584
        del self.clients_dict[path]
564
 
        if not self.clients_dict:
565
 
            # Work around bug in Urwid 0.9.8.3 - if a SimpleListWalker
566
 
            # is completely emptied, we need to recreate it.
567
 
            self.clients = urwid.SimpleListWalker([])
568
 
            self.rebuild()
569
585
        self.refresh()
570
586
    
571
587
    def refresh(self):
584
600
        try:
585
601
            mandos_clients = (self.mandos_serv
586
602
                              .GetAllClientsWithProperties())
 
603
            if not mandos_clients:
 
604
                self.log_message_raw(("bold", "Note: Server has no clients."))
587
605
        except dbus.exceptions.DBusException:
 
606
            self.log_message_raw(("bold", "Note: No Mandos server running."))
588
607
            mandos_clients = dbus.Dictionary()
589
608
        
590
609
        (self.mandos_serv
591
 
         .connect_to_signal("ClientRemoved",
 
610
         .connect_to_signal("InterfacesRemoved",
592
611
                            self.find_and_remove_client,
593
 
                            dbus_interface=server_interface,
 
612
                            dbus_interface
 
613
                            = dbus.OBJECT_MANAGER_IFACE,
594
614
                            byte_arrays=True))
595
615
        (self.mandos_serv
596
 
         .connect_to_signal("ClientAdded",
 
616
         .connect_to_signal("InterfacesAdded",
597
617
                            self.add_new_client,
598
 
                            dbus_interface=server_interface,
 
618
                            dbus_interface
 
619
                            = dbus.OBJECT_MANAGER_IFACE,
599
620
                            byte_arrays=True))
600
621
        (self.mandos_serv
601
622
         .connect_to_signal("ClientNotFound",
602
623
                            self.client_not_found,
603
624
                            dbus_interface=server_interface,
604
625
                            byte_arrays=True))
605
 
        for path, client in mandos_clients.iteritems():
 
626
        for path, client in mandos_clients.items():
606
627
            client_proxy_object = self.bus.get_object(self.busname,
607
628
                                                      path)
608
629
            self.add_client(MandosClientWidget(server_proxy_object
655
676
            elif key == "window resize":
656
677
                self.size = self.screen.get_cols_rows()
657
678
                self.refresh()
658
 
            elif key == "\f":  # Ctrl-L
 
679
            elif key == "ctrl l":
 
680
                self.screen.clear()
659
681
                self.refresh()
660
682
            elif key == "l" or key == "D":
661
683
                self.toggle_log_display()
673
695
                                            "?: Help",
674
696
                                            "l: Log window toggle",
675
697
                                            "TAB: Switch window",
676
 
                                            "w: Wrap (log)"))))
 
698
                                            "w: Wrap (log lines)",
 
699
                                            "v: Toggle verbose log",
 
700
                                            ))))
677
701
                self.log_message_raw(("bold",
678
702
                                      "  "
679
703
                                      .join(("Clients:",
692
716
                else:
693
717
                    self.topwidget.set_focus(self.logbox)
694
718
                self.refresh()
 
719
            elif key == "v":
 
720
                if self.log_level == 0:
 
721
                    self.log_level = 1
 
722
                    self.log_message("Verbose mode: Off")
 
723
                else:
 
724
                    self.log_level = 0
 
725
                    self.log_message("Verbose mode: On")
695
726
            #elif (key == "end" or key == "meta >" or key == "G"
696
727
            #      or key == ">"):
697
728
            #    pass            # xxx end-of-buffer
720
751
    ui.run()
721
752
except KeyboardInterrupt:
722
753
    ui.screen.stop()
723
 
except Exception, e:
724
 
    ui.log_message(unicode(e))
 
754
except Exception as e:
 
755
    ui.log_message(str(e))
725
756
    ui.screen.stop()
726
757
    raise