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  • Committer: Teddy Hogeborn
  • Date: 2017-08-20 14:14:14 UTC
  • Revision ID: teddy@recompile.se-20170820141414-m034xuebg7ccaeui
Add some more restrictions to the systemd service file.

* mandos.service ([Service]/ProtectKernelTunables): New; set to "yes".
  ([Service]/ProtectControlGroups): - '' -

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mandos-monitor
1
 
#!/usr/bin/python3 -bbI
 
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
3
#
4
4
# Mandos Monitor - Control and monitor the Mandos server
5
5
#
6
 
# Copyright © 2009-2019 Teddy Hogeborn
7
 
# Copyright © 2009-2019 Björn Påhlsson
8
 
#
9
 
# This file is part of Mandos.
10
 
#
11
 
# Mandos is free software: you can redistribute it and/or modify it
12
 
# under the terms of the GNU General Public License as published by
 
6
# Copyright © 2009-2017 Teddy Hogeborn
 
7
# Copyright © 2009-2017 Björn Påhlsson
 
8
#
 
9
# This program is free software: you can redistribute it and/or modify
 
10
# it under the terms of the GNU General Public License as published by
13
11
# the Free Software Foundation, either version 3 of the License, or
14
12
# (at your option) any later version.
15
13
#
16
 
#     Mandos is distributed in the hope that it will be useful, but
17
 
#     WITHOUT ANY WARRANTY; without even the implied warranty of
 
14
#     This program is distributed in the hope that it will be useful,
 
15
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
18
16
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19
17
#     GNU General Public License for more details.
20
18
#
21
19
# You should have received a copy of the GNU General Public License
22
 
# along with Mandos.  If not, see <http://www.gnu.org/licenses/>.
 
20
# along with this program.  If not, see
 
21
# <http://www.gnu.org/licenses/>.
23
22
#
24
23
# Contact the authors at <mandos@recompile.se>.
25
24
#
33
32
 
34
33
import sys
35
34
import os
36
 
import warnings
 
35
 
37
36
import datetime
38
 
import locale
39
 
import logging
40
37
 
41
38
import urwid.curses_display
42
39
import urwid
46
43
 
47
44
import dbus
48
45
 
 
46
import locale
 
47
 
 
48
import logging
 
49
 
49
50
if sys.version_info.major == 2:
50
 
    __metaclass__ = type
51
51
    str = unicode
52
52
 
53
 
log = logging.getLogger(os.path.basename(sys.argv[0]))
54
 
logging.basicConfig(level="NOTSET", # Show all messages
55
 
                    format="%(message)s") # Show basic log messages
56
 
 
57
 
logging.captureWarnings(True)   # Show warnings via the logging system
58
 
 
59
 
locale.setlocale(locale.LC_ALL, "")
60
 
 
61
 
logging.getLogger("dbus.proxies").setLevel(logging.CRITICAL)
 
53
locale.setlocale(locale.LC_ALL, '')
 
54
 
 
55
logging.getLogger('dbus.proxies').setLevel(logging.CRITICAL)
62
56
 
63
57
# Some useful constants
64
 
domain = "se.recompile"
65
 
server_interface = domain + ".Mandos"
66
 
client_interface = domain + ".Mandos.Client"
67
 
version = "1.8.11"
 
58
domain = 'se.recompile'
 
59
server_interface = domain + '.Mandos'
 
60
client_interface = domain + '.Mandos.Client'
 
61
version = "1.7.15"
68
62
 
69
63
try:
70
64
    dbus.OBJECT_MANAGER_IFACE
89
83
                             int(fraction*1000000))  # Microseconds
90
84
 
91
85
 
92
 
class MandosClientPropertyCache:
 
86
class MandosClientPropertyCache(object):
93
87
    """This wraps a Mandos Client D-Bus proxy object, caches the
94
88
    properties and calls a hook function when any of them are
95
89
    changed.
127
121
    """
128
122
 
129
123
    def __init__(self, server_proxy_object=None, update_hook=None,
130
 
                 delete_hook=None, **kwargs):
 
124
                 delete_hook=None, logger=None, **kwargs):
131
125
        # Called on update
132
126
        self.update_hook = update_hook
133
127
        # Called on delete
134
128
        self.delete_hook = delete_hook
135
129
        # Mandos Server proxy object
136
130
        self.server_proxy_object = server_proxy_object
 
131
        # Logger
 
132
        self.logger = logger
137
133
 
138
134
        self._update_timer_callback_tag = None
139
135
 
166
162
                                         self.rejected,
167
163
                                         client_interface,
168
164
                                         byte_arrays=True))
169
 
        log.debug("Created client %s", self.properties["Name"])
 
165
        self.logger('Created client {}'
 
166
                    .format(self.properties["Name"]), level=0)
170
167
 
171
168
    def using_timer(self, flag):
172
169
        """Call this method with True or False when timer should be
174
171
        """
175
172
        if flag and self._update_timer_callback_tag is None:
176
173
            # Will update the shown timer value every second
177
 
            self._update_timer_callback_tag = (
178
 
                GLib.timeout_add(1000,
179
 
                                 glib_safely(self.update_timer)))
 
174
            self._update_timer_callback_tag = (GLib.timeout_add
 
175
                                               (1000,
 
176
                                                self.update_timer))
180
177
        elif not (flag or self._update_timer_callback_tag is None):
181
178
            GLib.source_remove(self._update_timer_callback_tag)
182
179
            self._update_timer_callback_tag = None
183
180
 
184
181
    def checker_completed(self, exitstatus, condition, command):
185
182
        if exitstatus == 0:
186
 
            log.debug('Checker for client %s (command "%s")'
187
 
                      " succeeded", self.properties["Name"], command)
 
183
            self.logger('Checker for client {} (command "{}")'
 
184
                        ' succeeded'.format(self.properties["Name"],
 
185
                                            command), level=0)
188
186
            self.update()
189
187
            return
190
188
        # Checker failed
191
189
        if os.WIFEXITED(condition):
192
 
            log.info('Checker for client %s (command "%s") failed'
193
 
                     " with exit code %d", self.properties["Name"],
194
 
                     command, os.WEXITSTATUS(condition))
 
190
            self.logger('Checker for client {} (command "{}") failed'
 
191
                        ' with exit code {}'
 
192
                        .format(self.properties["Name"], command,
 
193
                                os.WEXITSTATUS(condition)))
195
194
        elif os.WIFSIGNALED(condition):
196
 
            log.info('Checker for client %s (command "%s") was'
197
 
                     " killed by signal %d", self.properties["Name"],
198
 
                     command, os.WTERMSIG(condition))
 
195
            self.logger('Checker for client {} (command "{}") was'
 
196
                        ' killed by signal {}'
 
197
                        .format(self.properties["Name"], command,
 
198
                                os.WTERMSIG(condition)))
199
199
        self.update()
200
200
 
201
201
    def checker_started(self, command):
202
202
        """Server signals that a checker started."""
203
 
        log.debug('Client %s started checker "%s"',
204
 
                  self.properties["Name"], command)
 
203
        self.logger('Client {} started checker "{}"'
 
204
                    .format(self.properties["Name"],
 
205
                            command), level=0)
205
206
 
206
207
    def got_secret(self):
207
 
        log.info("Client %s received its secret",
208
 
                 self.properties["Name"])
 
208
        self.logger('Client {} received its secret'
 
209
                    .format(self.properties["Name"]))
209
210
 
210
211
    def need_approval(self, timeout, default):
211
212
        if not default:
212
 
            message = "Client %s needs approval within %f seconds"
 
213
            message = 'Client {} needs approval within {} seconds'
213
214
        else:
214
 
            message = "Client %s will get its secret in %f seconds"
215
 
        log.info(message, self.properties["Name"], timeout/1000)
 
215
            message = 'Client {} will get its secret in {} seconds'
 
216
        self.logger(message.format(self.properties["Name"],
 
217
                                   timeout/1000))
216
218
 
217
219
    def rejected(self, reason):
218
 
        log.info("Client %s was rejected; reason: %s",
219
 
                 self.properties["Name"], reason)
 
220
        self.logger('Client {} was rejected; reason: {}'
 
221
                    .format(self.properties["Name"], reason))
220
222
 
221
223
    def selectable(self):
222
224
        """Make this a "selectable" widget.
248
250
        # Rebuild focus and non-focus widgets using current properties
249
251
 
250
252
        # Base part of a client. Name!
251
 
        base = "{name}: ".format(name=self.properties["Name"])
 
253
        base = '{name}: '.format(name=self.properties["Name"])
252
254
        if not self.properties["Enabled"]:
253
255
            message = "DISABLED"
254
256
            self.using_timer(False)
276
278
                timer = datetime.timedelta(0)
277
279
            else:
278
280
                expires = (datetime.datetime.strptime
279
 
                           (expires, "%Y-%m-%dT%H:%M:%S.%f"))
 
281
                           (expires, '%Y-%m-%dT%H:%M:%S.%f'))
280
282
                timer = max(expires - datetime.datetime.utcnow(),
281
283
                            datetime.timedelta())
282
 
            message = ("A checker has failed! Time until client"
283
 
                       " gets disabled: {}"
 
284
            message = ('A checker has failed! Time until client'
 
285
                       ' gets disabled: {}'
284
286
                       .format(str(timer).rsplit(".", 1)[0]))
285
287
            self.using_timer(True)
286
288
        else:
384
386
            self.update()
385
387
 
386
388
 
387
 
def glib_safely(func, retval=True):
388
 
    def safe_func(*args, **kwargs):
389
 
        try:
390
 
            return func(*args, **kwargs)
391
 
        except Exception:
392
 
            log.exception("")
393
 
            return retval
394
 
    return safe_func
395
 
 
396
 
 
397
389
class ConstrainedListBox(urwid.ListBox):
398
390
    """Like a normal urwid.ListBox, but will consume all "up" or
399
391
    "down" key presses, thus not allowing any containing widgets to
407
399
        return ret
408
400
 
409
401
 
410
 
class UserInterface:
 
402
class UserInterface(object):
411
403
    """This is the entire user interface - the whole screen
412
404
    with boxes, lists of client widgets, etc.
413
405
    """
414
 
    def __init__(self, max_log_length=1000):
 
406
    def __init__(self, max_log_length=1000, log_level=1):
415
407
        DBusGMainLoop(set_as_default=True)
416
408
 
417
409
        self.screen = urwid.curses_display.Screen()
451
443
        self.clients_dict = {}
452
444
 
453
445
        # We will add Text widgets to this list
454
 
        self.log = urwid.SimpleListWalker([])
 
446
        self.log = []
455
447
        self.max_log_length = max_log_length
456
448
 
 
449
        self.log_level = log_level
 
450
 
457
451
        # We keep a reference to the log widget so we can remove it
458
452
        # from the ListWalker without it getting destroyed
459
453
        self.logbox = ConstrainedListBox(self.log)
463
457
        self.log_visible = True
464
458
        self.log_wrap = "any"
465
459
 
466
 
        self.loghandler = UILogHandler(self)
467
 
 
468
460
        self.rebuild()
469
 
        self.add_log_line(("bold",
470
 
                           "Mandos Monitor version " + version))
471
 
        self.add_log_line(("bold", "q: Quit  ?: Help"))
 
461
        self.log_message_raw(("bold",
 
462
                              "Mandos Monitor version " + version))
 
463
        self.log_message_raw(("bold",
 
464
                              "q: Quit  ?: Help"))
472
465
 
473
 
        self.busname = domain + ".Mandos"
 
466
        self.busname = domain + '.Mandos'
474
467
        self.main_loop = GLib.MainLoop()
475
468
 
476
 
    def client_not_found(self, key_id, address):
477
 
        log.info("Client with address %s and key ID %s could"
478
 
                 " not be found", address, key_id)
 
469
    def client_not_found(self, fingerprint, address):
 
470
        self.log_message("Client with address {} and fingerprint {}"
 
471
                         " could not be found"
 
472
                         .format(address, fingerprint))
479
473
 
480
474
    def rebuild(self):
481
475
        """This rebuilds the User Interface.
492
486
            self.uilist.append(self.logbox)
493
487
        self.topwidget = urwid.Pile(self.uilist)
494
488
 
495
 
    def add_log_line(self, markup):
 
489
    def log_message(self, message, level=1):
 
490
        """Log message formatted with timestamp"""
 
491
        if level < self.log_level:
 
492
            return
 
493
        timestamp = datetime.datetime.now().isoformat()
 
494
        self.log_message_raw("{}: {}".format(timestamp, message),
 
495
                             level=level)
 
496
 
 
497
    def log_message_raw(self, markup, level=1):
 
498
        """Add a log message to the log buffer."""
 
499
        if level < self.log_level:
 
500
            return
496
501
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
497
502
        if self.max_log_length:
498
503
            if len(self.log) > self.max_log_length:
499
 
                del self.log[0:(len(self.log) - self.max_log_length)]
500
 
        self.logbox.set_focus(len(self.logbox.body.contents)-1,
 
504
                del self.log[0:len(self.log)-self.max_log_length-1]
 
505
        self.logbox.set_focus(len(self.logbox.body.contents),
501
506
                              coming_from="above")
502
507
        self.refresh()
503
508
 
505
510
        """Toggle visibility of the log buffer."""
506
511
        self.log_visible = not self.log_visible
507
512
        self.rebuild()
508
 
        log.debug("Log visibility changed to: %s", self.log_visible)
 
513
        self.log_message("Log visibility changed to: {}"
 
514
                         .format(self.log_visible), level=0)
509
515
 
510
516
    def change_log_display(self):
511
517
        """Change type of log display.
516
522
            self.log_wrap = "clip"
517
523
        for textwidget in self.log:
518
524
            textwidget.set_wrap_mode(self.log_wrap)
519
 
        log.debug("Wrap mode: %s", self.log_wrap)
 
525
        self.log_message("Wrap mode: {}".format(self.log_wrap),
 
526
                         level=0)
520
527
 
521
528
    def find_and_remove_client(self, path, interfaces):
522
529
        """Find a client by its object path and remove it.
530
537
            client = self.clients_dict[path]
531
538
        except KeyError:
532
539
            # not found?
533
 
            log.warning("Unknown client %s removed", path)
 
540
            self.log_message("Unknown client {!r} removed"
 
541
                             .format(path))
534
542
            return
535
543
        client.delete()
536
544
 
549
557
            proxy_object=client_proxy_object,
550
558
            update_hook=self.refresh,
551
559
            delete_hook=self.remove_client,
 
560
            logger=self.log_message,
552
561
            properties=dict(ifs_and_props[client_interface])),
553
562
                        path=path)
554
563
 
574
583
 
575
584
    def run(self):
576
585
        """Start the main loop and exit when it's done."""
577
 
        log.addHandler(self.loghandler)
578
 
        self.orig_log_propagate = log.propagate
579
 
        log.propagate = False
580
 
        self.orig_log_level = log.level
581
 
        log.setLevel("INFO")
582
586
        self.bus = dbus.SystemBus()
583
587
        mandos_dbus_objc = self.bus.get_object(
584
588
            self.busname, "/", follow_name_owner_changes=True)
588
592
            mandos_clients = (self.mandos_serv
589
593
                              .GetAllClientsWithProperties())
590
594
            if not mandos_clients:
591
 
                log.warning("Note: Server has no clients.")
 
595
                self.log_message_raw(("bold",
 
596
                                      "Note: Server has no clients."))
592
597
        except dbus.exceptions.DBusException:
593
 
            log.warning("Note: No Mandos server running.")
 
598
            self.log_message_raw(("bold",
 
599
                                  "Note: No Mandos server running."))
594
600
            mandos_clients = dbus.Dictionary()
595
601
 
596
602
        (self.mandos_serv
616
622
                proxy_object=client_proxy_object,
617
623
                properties=client,
618
624
                update_hook=self.refresh,
619
 
                delete_hook=self.remove_client),
 
625
                delete_hook=self.remove_client,
 
626
                logger=self.log_message),
620
627
                            path=path)
621
628
 
622
629
        self.refresh()
623
 
        self._input_callback_tag = (
624
 
            GLib.io_add_watch(
625
 
                GLib.IOChannel.unix_new(sys.stdin.fileno()),
626
 
                GLib.PRIORITY_DEFAULT, GLib.IO_IN,
627
 
                glib_safely(self.process_input)))
 
630
        self._input_callback_tag = (GLib.io_add_watch
 
631
                                    (sys.stdin.fileno(),
 
632
                                     GLib.IO_IN,
 
633
                                     self.process_input))
628
634
        self.main_loop.run()
629
635
        # Main loop has finished, we should close everything now
630
636
        GLib.source_remove(self._input_callback_tag)
631
 
        with warnings.catch_warnings():
632
 
            warnings.simplefilter("ignore", BytesWarning)
633
 
            self.screen.stop()
 
637
        self.screen.stop()
634
638
 
635
639
    def stop(self):
636
640
        self.main_loop.quit()
637
 
        log.removeHandler(self.loghandler)
638
 
        log.propagate = self.orig_log_propagate
639
641
 
640
642
    def process_input(self, source, condition):
641
643
        keys = self.screen.get_input()
674
676
                if not self.log_visible:
675
677
                    self.log_visible = True
676
678
                    self.rebuild()
677
 
                self.add_log_line(("bold",
678
 
                                   "  ".join(("q: Quit",
679
 
                                              "?: Help",
680
 
                                              "l: Log window toggle",
681
 
                                              "TAB: Switch window",
682
 
                                              "w: Wrap (log lines)",
683
 
                                              "v: Toggle verbose log",
684
 
                                   ))))
685
 
                self.add_log_line(("bold",
686
 
                                   "  ".join(("Clients:",
687
 
                                              "+: Enable",
688
 
                                              "-: Disable",
689
 
                                              "R: Remove",
690
 
                                              "s: Start new checker",
691
 
                                              "S: Stop checker",
692
 
                                              "C: Checker OK",
693
 
                                              "a: Approve",
694
 
                                              "d: Deny",
695
 
                                   ))))
 
679
                self.log_message_raw(("bold",
 
680
                                      "  ".
 
681
                                      join(("q: Quit",
 
682
                                            "?: Help",
 
683
                                            "l: Log window toggle",
 
684
                                            "TAB: Switch window",
 
685
                                            "w: Wrap (log lines)",
 
686
                                            "v: Toggle verbose log",
 
687
                                            ))))
 
688
                self.log_message_raw(("bold",
 
689
                                      "  "
 
690
                                      .join(("Clients:",
 
691
                                             "+: Enable",
 
692
                                             "-: Disable",
 
693
                                             "R: Remove",
 
694
                                             "s: Start new checker",
 
695
                                             "S: Stop checker",
 
696
                                             "C: Checker OK",
 
697
                                             "a: Approve",
 
698
                                             "d: Deny"))))
696
699
                self.refresh()
697
700
            elif key == "tab":
698
701
                if self.topwidget.get_focus() is self.logbox:
701
704
                    self.topwidget.set_focus(self.logbox)
702
705
                self.refresh()
703
706
            elif key == "v":
704
 
                if log.level < logging.INFO:
705
 
                    log.setLevel(logging.INFO)
706
 
                    log.info("Verbose mode: Off")
 
707
                if self.log_level == 0:
 
708
                    self.log_level = 1
 
709
                    self.log_message("Verbose mode: Off")
707
710
                else:
708
 
                    log.setLevel(logging.NOTSET)
709
 
                    log.info("Verbose mode: On")
 
711
                    self.log_level = 0
 
712
                    self.log_message("Verbose mode: On")
710
713
            # elif (key == "end" or key == "meta >" or key == "G"
711
714
            #       or key == ">"):
712
715
            #     pass            # xxx end-of-buffer
731
734
        return True
732
735
 
733
736
 
734
 
class UILogHandler(logging.Handler):
735
 
    def __init__(self, ui, *args, **kwargs):
736
 
        self.ui = ui
737
 
        super(UILogHandler, self).__init__(*args, **kwargs)
738
 
        self.setFormatter(
739
 
            logging.Formatter("%(asctime)s: %(message)s"))
740
 
    def emit(self, record):
741
 
        msg = self.format(record)
742
 
        if record.levelno > logging.INFO:
743
 
            msg = ("bold", msg)
744
 
        self.ui.add_log_line(msg)
745
 
 
746
 
 
747
737
ui = UserInterface()
748
738
try:
749
739
    ui.run()
750
740
except KeyboardInterrupt:
751
 
    with warnings.catch_warnings():
752
 
        warnings.filterwarnings("ignore", "", BytesWarning)
753
 
        ui.screen.stop()
754
 
except Exception:
755
 
    with warnings.catch_warnings():
756
 
        warnings.filterwarnings("ignore", "", BytesWarning)
757
 
        ui.screen.stop()
 
741
    ui.screen.stop()
 
742
except Exception as e:
 
743
    ui.log_message(str(e))
 
744
    ui.screen.stop()
758
745
    raise