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  • Committer: teddy at recompile
  • Date: 2020-11-30 16:25:32 UTC
  • Revision ID: teddy@recompile.se-20201130162532-b73s2tsihw3so6pw
Update Debian Policy version to 4.5.1; no other changes necessary.

* debian/control (Standards-Version): Change to "4.5.1".

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Lines of Context:
mandos-monitor
 
1
#!/usr/bin/python3 -bbI
 
2
# -*- mode: python; coding: utf-8 -*-
 
3
#
 
4
# Mandos Monitor - Control and monitor the Mandos server
 
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
 
13
# the Free Software Foundation, either version 3 of the License, or
 
14
# (at your option) any later version.
 
15
#
 
16
#     Mandos is distributed in the hope that it will be useful, but
 
17
#     WITHOUT ANY WARRANTY; without even the implied warranty of
 
18
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
19
#     GNU General Public License for more details.
 
20
#
 
21
# You should have received a copy of the GNU General Public License
 
22
# along with Mandos.  If not, see <http://www.gnu.org/licenses/>.
 
23
#
 
24
# Contact the authors at <mandos@recompile.se>.
 
25
#
 
26
 
 
27
from __future__ import (division, absolute_import, print_function,
 
28
                        unicode_literals)
 
29
try:
 
30
    from future_builtins import *
 
31
except ImportError:
 
32
    pass
 
33
 
 
34
import sys
 
35
import os
 
36
import warnings
 
37
import datetime
 
38
import locale
 
39
import logging
 
40
 
 
41
import urwid.curses_display
 
42
import urwid
 
43
 
 
44
from dbus.mainloop.glib import DBusGMainLoop
 
45
from gi.repository import GLib
 
46
 
 
47
import dbus
 
48
 
 
49
if sys.version_info.major == 2:
 
50
    __metaclass__ = type
 
51
    str = unicode
 
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)
 
62
 
 
63
# Some useful constants
 
64
domain = "se.recompile"
 
65
server_interface = domain + ".Mandos"
 
66
client_interface = domain + ".Mandos.Client"
 
67
version = "1.8.12"
 
68
 
 
69
try:
 
70
    dbus.OBJECT_MANAGER_IFACE
 
71
except AttributeError:
 
72
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
73
 
 
74
 
 
75
def isoformat_to_datetime(iso):
 
76
    "Parse an ISO 8601 date string to a datetime.datetime()"
 
77
    if not iso:
 
78
        return None
 
79
    d, t = iso.split("T", 1)
 
80
    year, month, day = d.split("-", 2)
 
81
    hour, minute, second = t.split(":", 2)
 
82
    second, fraction = divmod(float(second), 1)
 
83
    return datetime.datetime(int(year),
 
84
                             int(month),
 
85
                             int(day),
 
86
                             int(hour),
 
87
                             int(minute),
 
88
                             int(second),            # Whole seconds
 
89
                             int(fraction*1000000))  # Microseconds
 
90
 
 
91
 
 
92
class MandosClientPropertyCache:
 
93
    """This wraps a Mandos Client D-Bus proxy object, caches the
 
94
    properties and calls a hook function when any of them are
 
95
    changed.
 
96
    """
 
97
    def __init__(self, proxy_object=None, properties=None, **kwargs):
 
98
        self.proxy = proxy_object  # Mandos Client proxy object
 
99
        self.properties = dict() if properties is None else properties
 
100
        self.property_changed_match = (
 
101
            self.proxy.connect_to_signal("PropertiesChanged",
 
102
                                         self.properties_changed,
 
103
                                         dbus.PROPERTIES_IFACE,
 
104
                                         byte_arrays=True))
 
105
 
 
106
        if properties is None:
 
107
            self.properties.update(self.proxy.GetAll(
 
108
                client_interface,
 
109
                dbus_interface=dbus.PROPERTIES_IFACE))
 
110
 
 
111
        super(MandosClientPropertyCache, self).__init__(**kwargs)
 
112
 
 
113
    def properties_changed(self, interface, properties, invalidated):
 
114
        """This is called whenever we get a PropertiesChanged signal
 
115
        It updates the changed properties in the "properties" dict.
 
116
        """
 
117
        # Update properties dict with new value
 
118
        if interface == client_interface:
 
119
            self.properties.update(properties)
 
120
 
 
121
    def delete(self):
 
122
        self.property_changed_match.remove()
 
123
 
 
124
 
 
125
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
 
126
    """A Mandos Client which is visible on the screen.
 
127
    """
 
128
 
 
129
    def __init__(self, server_proxy_object=None, update_hook=None,
 
130
                 delete_hook=None, **kwargs):
 
131
        # Called on update
 
132
        self.update_hook = update_hook
 
133
        # Called on delete
 
134
        self.delete_hook = delete_hook
 
135
        # Mandos Server proxy object
 
136
        self.server_proxy_object = server_proxy_object
 
137
 
 
138
        self._update_timer_callback_tag = None
 
139
 
 
140
        # The widget shown normally
 
141
        self._text_widget = urwid.Text("")
 
142
        # The widget shown when we have focus
 
143
        self._focus_text_widget = urwid.Text("")
 
144
        super(MandosClientWidget, self).__init__(**kwargs)
 
145
        self.update()
 
146
        self.opened = False
 
147
 
 
148
        self.match_objects = (
 
149
            self.proxy.connect_to_signal("CheckerCompleted",
 
150
                                         self.checker_completed,
 
151
                                         client_interface,
 
152
                                         byte_arrays=True),
 
153
            self.proxy.connect_to_signal("CheckerStarted",
 
154
                                         self.checker_started,
 
155
                                         client_interface,
 
156
                                         byte_arrays=True),
 
157
            self.proxy.connect_to_signal("GotSecret",
 
158
                                         self.got_secret,
 
159
                                         client_interface,
 
160
                                         byte_arrays=True),
 
161
            self.proxy.connect_to_signal("NeedApproval",
 
162
                                         self.need_approval,
 
163
                                         client_interface,
 
164
                                         byte_arrays=True),
 
165
            self.proxy.connect_to_signal("Rejected",
 
166
                                         self.rejected,
 
167
                                         client_interface,
 
168
                                         byte_arrays=True))
 
169
        log.debug("Created client %s", self.properties["Name"])
 
170
 
 
171
    def using_timer(self, flag):
 
172
        """Call this method with True or False when timer should be
 
173
        activated or deactivated.
 
174
        """
 
175
        if flag and self._update_timer_callback_tag is None:
 
176
            # 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)))
 
180
        elif not (flag or self._update_timer_callback_tag is None):
 
181
            GLib.source_remove(self._update_timer_callback_tag)
 
182
            self._update_timer_callback_tag = None
 
183
 
 
184
    def checker_completed(self, exitstatus, condition, command):
 
185
        if exitstatus == 0:
 
186
            log.debug('Checker for client %s (command "%s")'
 
187
                      " succeeded", self.properties["Name"], command)
 
188
            self.update()
 
189
            return
 
190
        # Checker failed
 
191
        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))
 
195
        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))
 
199
        self.update()
 
200
 
 
201
    def checker_started(self, command):
 
202
        """Server signals that a checker started."""
 
203
        log.debug('Client %s started checker "%s"',
 
204
                  self.properties["Name"], command)
 
205
 
 
206
    def got_secret(self):
 
207
        log.info("Client %s received its secret",
 
208
                 self.properties["Name"])
 
209
 
 
210
    def need_approval(self, timeout, default):
 
211
        if not default:
 
212
            message = "Client %s needs approval within %f seconds"
 
213
        else:
 
214
            message = "Client %s will get its secret in %f seconds"
 
215
        log.info(message, self.properties["Name"], timeout/1000)
 
216
 
 
217
    def rejected(self, reason):
 
218
        log.info("Client %s was rejected; reason: %s",
 
219
                 self.properties["Name"], reason)
 
220
 
 
221
    def selectable(self):
 
222
        """Make this a "selectable" widget.
 
223
        This overrides the method from urwid.FlowWidget."""
 
224
        return True
 
225
 
 
226
    def rows(self, maxcolrow, focus=False):
 
227
        """How many rows this widget will occupy might depend on
 
228
        whether we have focus or not.
 
229
        This overrides the method from urwid.FlowWidget"""
 
230
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
 
231
 
 
232
    def current_widget(self, focus=False):
 
233
        if focus or self.opened:
 
234
            return self._focus_widget
 
235
        return self._widget
 
236
 
 
237
    def update(self):
 
238
        "Called when what is visible on the screen should be updated."
 
239
        # How to add standout mode to a style
 
240
        with_standout = {"normal": "standout",
 
241
                         "bold": "bold-standout",
 
242
                         "underline-blink":
 
243
                         "underline-blink-standout",
 
244
                         "bold-underline-blink":
 
245
                         "bold-underline-blink-standout",
 
246
                         }
 
247
 
 
248
        # Rebuild focus and non-focus widgets using current properties
 
249
 
 
250
        # Base part of a client. Name!
 
251
        base = "{name}: ".format(name=self.properties["Name"])
 
252
        if not self.properties["Enabled"]:
 
253
            message = "DISABLED"
 
254
            self.using_timer(False)
 
255
        elif self.properties["ApprovalPending"]:
 
256
            timeout = datetime.timedelta(
 
257
                milliseconds=self.properties["ApprovalDelay"])
 
258
            last_approval_request = isoformat_to_datetime(
 
259
                self.properties["LastApprovalRequest"])
 
260
            if last_approval_request is not None:
 
261
                timer = max(timeout - (datetime.datetime.utcnow()
 
262
                                       - last_approval_request),
 
263
                            datetime.timedelta())
 
264
            else:
 
265
                timer = datetime.timedelta()
 
266
            if self.properties["ApprovedByDefault"]:
 
267
                message = "Approval in {}. (d)eny?"
 
268
            else:
 
269
                message = "Denial in {}. (a)pprove?"
 
270
            message = message.format(str(timer).rsplit(".", 1)[0])
 
271
            self.using_timer(True)
 
272
        elif self.properties["LastCheckerStatus"] != 0:
 
273
            # When checker has failed, show timer until client expires
 
274
            expires = self.properties["Expires"]
 
275
            if expires == "":
 
276
                timer = datetime.timedelta(0)
 
277
            else:
 
278
                expires = (datetime.datetime.strptime
 
279
                           (expires, "%Y-%m-%dT%H:%M:%S.%f"))
 
280
                timer = max(expires - datetime.datetime.utcnow(),
 
281
                            datetime.timedelta())
 
282
            message = ("A checker has failed! Time until client"
 
283
                       " gets disabled: {}"
 
284
                       .format(str(timer).rsplit(".", 1)[0]))
 
285
            self.using_timer(True)
 
286
        else:
 
287
            message = "enabled"
 
288
            self.using_timer(False)
 
289
        self._text = "{}{}".format(base, message)
 
290
 
 
291
        if not urwid.supports_unicode():
 
292
            self._text = self._text.encode("ascii", "replace")
 
293
        textlist = [("normal", self._text)]
 
294
        self._text_widget.set_text(textlist)
 
295
        self._focus_text_widget.set_text([(with_standout[text[0]],
 
296
                                           text[1])
 
297
                                          if isinstance(text, tuple)
 
298
                                          else text
 
299
                                          for text in textlist])
 
300
        self._widget = self._text_widget
 
301
        self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
 
302
                                            "standout")
 
303
        # Run update hook, if any
 
304
        if self.update_hook is not None:
 
305
            self.update_hook()
 
306
 
 
307
    def update_timer(self):
 
308
        """called by GLib. Will indefinitely loop until
 
309
        GLib.source_remove() on tag is called
 
310
        """
 
311
        self.update()
 
312
        return True             # Keep calling this
 
313
 
 
314
    def delete(self, **kwargs):
 
315
        if self._update_timer_callback_tag is not None:
 
316
            GLib.source_remove(self._update_timer_callback_tag)
 
317
            self._update_timer_callback_tag = None
 
318
        for match in self.match_objects:
 
319
            match.remove()
 
320
        self.match_objects = ()
 
321
        if self.delete_hook is not None:
 
322
            self.delete_hook(self)
 
323
        return super(MandosClientWidget, self).delete(**kwargs)
 
324
 
 
325
    def render(self, maxcolrow, focus=False):
 
326
        """Render differently if we have focus.
 
327
        This overrides the method from urwid.FlowWidget"""
 
328
        return self.current_widget(focus).render(maxcolrow,
 
329
                                                 focus=focus)
 
330
 
 
331
    def keypress(self, maxcolrow, key):
 
332
        """Handle keys.
 
333
        This overrides the method from urwid.FlowWidget"""
 
334
        if key == "+":
 
335
            self.proxy.Set(client_interface, "Enabled",
 
336
                           dbus.Boolean(True), ignore_reply=True,
 
337
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
338
        elif key == "-":
 
339
            self.proxy.Set(client_interface, "Enabled", False,
 
340
                           ignore_reply=True,
 
341
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
342
        elif key == "a":
 
343
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
 
344
                               dbus_interface=client_interface,
 
345
                               ignore_reply=True)
 
346
        elif key == "d":
 
347
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
 
348
                               dbus_interface=client_interface,
 
349
                               ignore_reply=True)
 
350
        elif key == "R" or key == "_" or key == "ctrl k":
 
351
            self.server_proxy_object.RemoveClient(self.proxy
 
352
                                                  .object_path,
 
353
                                                  ignore_reply=True)
 
354
        elif key == "s":
 
355
            self.proxy.Set(client_interface, "CheckerRunning",
 
356
                           dbus.Boolean(True), ignore_reply=True,
 
357
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
358
        elif key == "S":
 
359
            self.proxy.Set(client_interface, "CheckerRunning",
 
360
                           dbus.Boolean(False), ignore_reply=True,
 
361
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
362
        elif key == "C":
 
363
            self.proxy.CheckedOK(dbus_interface=client_interface,
 
364
                                 ignore_reply=True)
 
365
        # xxx
 
366
#         elif key == "p" or key == "=":
 
367
#             self.proxy.pause()
 
368
#         elif key == "u" or key == ":":
 
369
#             self.proxy.unpause()
 
370
#         elif key == "RET":
 
371
#             self.open()
 
372
        else:
 
373
            return key
 
374
 
 
375
    def properties_changed(self, interface, properties, invalidated):
 
376
        """Call self.update() if any properties changed.
 
377
        This overrides the method from MandosClientPropertyCache"""
 
378
        old_values = {key: self.properties.get(key)
 
379
                      for key in properties.keys()}
 
380
        super(MandosClientWidget, self).properties_changed(
 
381
            interface, properties, invalidated)
 
382
        if any(old_values[key] != self.properties.get(key)
 
383
               for key in old_values):
 
384
            self.update()
 
385
 
 
386
 
 
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
class ConstrainedListBox(urwid.ListBox):
 
398
    """Like a normal urwid.ListBox, but will consume all "up" or
 
399
    "down" key presses, thus not allowing any containing widgets to
 
400
    use them as an excuse to shift focus away from this widget.
 
401
    """
 
402
    def keypress(self, *args, **kwargs):
 
403
        ret = (super(ConstrainedListBox, self)
 
404
               .keypress(*args, **kwargs))
 
405
        if ret in ("up", "down"):
 
406
            return
 
407
        return ret
 
408
 
 
409
 
 
410
class UserInterface:
 
411
    """This is the entire user interface - the whole screen
 
412
    with boxes, lists of client widgets, etc.
 
413
    """
 
414
    def __init__(self, max_log_length=1000):
 
415
        DBusGMainLoop(set_as_default=True)
 
416
 
 
417
        self.screen = urwid.curses_display.Screen()
 
418
 
 
419
        self.screen.register_palette((
 
420
                ("normal",
 
421
                 "default", "default", None),
 
422
                ("bold",
 
423
                 "bold", "default", "bold"),
 
424
                ("underline-blink",
 
425
                 "underline,blink", "default", "underline,blink"),
 
426
                ("standout",
 
427
                 "standout", "default", "standout"),
 
428
                ("bold-underline-blink",
 
429
                 "bold,underline,blink", "default",
 
430
                 "bold,underline,blink"),
 
431
                ("bold-standout",
 
432
                 "bold,standout", "default", "bold,standout"),
 
433
                ("underline-blink-standout",
 
434
                 "underline,blink,standout", "default",
 
435
                 "underline,blink,standout"),
 
436
                ("bold-underline-blink-standout",
 
437
                 "bold,underline,blink,standout", "default",
 
438
                 "bold,underline,blink,standout"),
 
439
                ))
 
440
 
 
441
        if urwid.supports_unicode():
 
442
            self.divider = "─"  # \u2500
 
443
        else:
 
444
            self.divider = "_"  # \u005f
 
445
 
 
446
        self.screen.start()
 
447
 
 
448
        self.size = self.screen.get_cols_rows()
 
449
 
 
450
        self.clients = urwid.SimpleListWalker([])
 
451
        self.clients_dict = {}
 
452
 
 
453
        # We will add Text widgets to this list
 
454
        self.log = urwid.SimpleListWalker([])
 
455
        self.max_log_length = max_log_length
 
456
 
 
457
        # We keep a reference to the log widget so we can remove it
 
458
        # from the ListWalker without it getting destroyed
 
459
        self.logbox = ConstrainedListBox(self.log)
 
460
 
 
461
        # This keeps track of whether self.uilist currently has
 
462
        # self.logbox in it or not
 
463
        self.log_visible = True
 
464
        self.log_wrap = "any"
 
465
 
 
466
        self.loghandler = UILogHandler(self)
 
467
 
 
468
        self.rebuild()
 
469
        self.add_log_line(("bold",
 
470
                           "Mandos Monitor version " + version))
 
471
        self.add_log_line(("bold", "q: Quit  ?: Help"))
 
472
 
 
473
        self.busname = domain + ".Mandos"
 
474
        self.main_loop = GLib.MainLoop()
 
475
 
 
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)
 
479
 
 
480
    def rebuild(self):
 
481
        """This rebuilds the User Interface.
 
482
        Call this when the widget layout needs to change"""
 
483
        self.uilist = []
 
484
        # self.uilist.append(urwid.ListBox(self.clients))
 
485
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
 
486
                                                          clients),
 
487
                                       # header=urwid.Divider(),
 
488
                                       header=None,
 
489
                                       footer=urwid.Divider(
 
490
                                           div_char=self.divider)))
 
491
        if self.log_visible:
 
492
            self.uilist.append(self.logbox)
 
493
        self.topwidget = urwid.Pile(self.uilist)
 
494
 
 
495
    def add_log_line(self, markup):
 
496
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
 
497
        if self.max_log_length:
 
498
            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,
 
501
                              coming_from="above")
 
502
        self.refresh()
 
503
 
 
504
    def toggle_log_display(self):
 
505
        """Toggle visibility of the log buffer."""
 
506
        self.log_visible = not self.log_visible
 
507
        self.rebuild()
 
508
        log.debug("Log visibility changed to: %s", self.log_visible)
 
509
 
 
510
    def change_log_display(self):
 
511
        """Change type of log display.
 
512
        Currently, this toggles wrapping of text lines."""
 
513
        if self.log_wrap == "clip":
 
514
            self.log_wrap = "any"
 
515
        else:
 
516
            self.log_wrap = "clip"
 
517
        for textwidget in self.log:
 
518
            textwidget.set_wrap_mode(self.log_wrap)
 
519
        log.debug("Wrap mode: %s", self.log_wrap)
 
520
 
 
521
    def find_and_remove_client(self, path, interfaces):
 
522
        """Find a client by its object path and remove it.
 
523
 
 
524
        This is connected to the InterfacesRemoved signal from the
 
525
        Mandos server object."""
 
526
        if client_interface not in interfaces:
 
527
            # Not a Mandos client object; ignore
 
528
            return
 
529
        try:
 
530
            client = self.clients_dict[path]
 
531
        except KeyError:
 
532
            # not found?
 
533
            log.warning("Unknown client %s removed", path)
 
534
            return
 
535
        client.delete()
 
536
 
 
537
    def add_new_client(self, path, ifs_and_props):
 
538
        """Find a client by its object path and remove it.
 
539
 
 
540
        This is connected to the InterfacesAdded signal from the
 
541
        Mandos server object.
 
542
        """
 
543
        if client_interface not in ifs_and_props:
 
544
            # Not a Mandos client object; ignore
 
545
            return
 
546
        client_proxy_object = self.bus.get_object(self.busname, path)
 
547
        self.add_client(MandosClientWidget(
 
548
            server_proxy_object=self.mandos_serv,
 
549
            proxy_object=client_proxy_object,
 
550
            update_hook=self.refresh,
 
551
            delete_hook=self.remove_client,
 
552
            properties=dict(ifs_and_props[client_interface])),
 
553
                        path=path)
 
554
 
 
555
    def add_client(self, client, path=None):
 
556
        self.clients.append(client)
 
557
        if path is None:
 
558
            path = client.proxy.object_path
 
559
        self.clients_dict[path] = client
 
560
        self.clients.sort(key=lambda c: c.properties["Name"])
 
561
        self.refresh()
 
562
 
 
563
    def remove_client(self, client, path=None):
 
564
        self.clients.remove(client)
 
565
        if path is None:
 
566
            path = client.proxy.object_path
 
567
        del self.clients_dict[path]
 
568
        self.refresh()
 
569
 
 
570
    def refresh(self):
 
571
        """Redraw the screen"""
 
572
        canvas = self.topwidget.render(self.size, focus=True)
 
573
        self.screen.draw_screen(self.size, canvas)
 
574
 
 
575
    def run(self):
 
576
        """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
        self.bus = dbus.SystemBus()
 
583
        mandos_dbus_objc = self.bus.get_object(
 
584
            self.busname, "/", follow_name_owner_changes=True)
 
585
        self.mandos_serv = dbus.Interface(
 
586
            mandos_dbus_objc, dbus_interface=server_interface)
 
587
        try:
 
588
            mandos_clients = (self.mandos_serv
 
589
                              .GetAllClientsWithProperties())
 
590
            if not mandos_clients:
 
591
                log.warning("Note: Server has no clients.")
 
592
        except dbus.exceptions.DBusException:
 
593
            log.warning("Note: No Mandos server running.")
 
594
            mandos_clients = dbus.Dictionary()
 
595
 
 
596
        (self.mandos_serv
 
597
         .connect_to_signal("InterfacesRemoved",
 
598
                            self.find_and_remove_client,
 
599
                            dbus_interface=dbus.OBJECT_MANAGER_IFACE,
 
600
                            byte_arrays=True))
 
601
        (self.mandos_serv
 
602
         .connect_to_signal("InterfacesAdded",
 
603
                            self.add_new_client,
 
604
                            dbus_interface=dbus.OBJECT_MANAGER_IFACE,
 
605
                            byte_arrays=True))
 
606
        (self.mandos_serv
 
607
         .connect_to_signal("ClientNotFound",
 
608
                            self.client_not_found,
 
609
                            dbus_interface=server_interface,
 
610
                            byte_arrays=True))
 
611
        for path, client in mandos_clients.items():
 
612
            client_proxy_object = self.bus.get_object(self.busname,
 
613
                                                      path)
 
614
            self.add_client(MandosClientWidget(
 
615
                server_proxy_object=self.mandos_serv,
 
616
                proxy_object=client_proxy_object,
 
617
                properties=client,
 
618
                update_hook=self.refresh,
 
619
                delete_hook=self.remove_client),
 
620
                            path=path)
 
621
 
 
622
        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)))
 
628
        self.main_loop.run()
 
629
        # Main loop has finished, we should close everything now
 
630
        GLib.source_remove(self._input_callback_tag)
 
631
        with warnings.catch_warnings():
 
632
            warnings.simplefilter("ignore", BytesWarning)
 
633
            self.screen.stop()
 
634
 
 
635
    def stop(self):
 
636
        self.main_loop.quit()
 
637
        log.removeHandler(self.loghandler)
 
638
        log.propagate = self.orig_log_propagate
 
639
 
 
640
    def process_input(self, source, condition):
 
641
        keys = self.screen.get_input()
 
642
        translations = {"ctrl n": "down",       # Emacs
 
643
                        "ctrl p": "up",         # Emacs
 
644
                        "ctrl v": "page down",  # Emacs
 
645
                        "meta v": "page up",    # Emacs
 
646
                        " ": "page down",       # less
 
647
                        "f": "page down",       # less
 
648
                        "b": "page up",         # less
 
649
                        "j": "down",            # vi
 
650
                        "k": "up",              # vi
 
651
                        }
 
652
        for key in keys:
 
653
            try:
 
654
                key = translations[key]
 
655
            except KeyError:    # :-)
 
656
                pass
 
657
 
 
658
            if key == "q" or key == "Q":
 
659
                self.stop()
 
660
                break
 
661
            elif key == "window resize":
 
662
                self.size = self.screen.get_cols_rows()
 
663
                self.refresh()
 
664
            elif key == "ctrl l":
 
665
                self.screen.clear()
 
666
                self.refresh()
 
667
            elif key == "l" or key == "D":
 
668
                self.toggle_log_display()
 
669
                self.refresh()
 
670
            elif key == "w" or key == "i":
 
671
                self.change_log_display()
 
672
                self.refresh()
 
673
            elif key == "?" or key == "f1" or key == "esc":
 
674
                if not self.log_visible:
 
675
                    self.log_visible = True
 
676
                    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
                                   ))))
 
696
                self.refresh()
 
697
            elif key == "tab":
 
698
                if self.topwidget.get_focus() is self.logbox:
 
699
                    self.topwidget.set_focus(0)
 
700
                else:
 
701
                    self.topwidget.set_focus(self.logbox)
 
702
                self.refresh()
 
703
            elif key == "v":
 
704
                if log.level < logging.INFO:
 
705
                    log.setLevel(logging.INFO)
 
706
                    log.info("Verbose mode: Off")
 
707
                else:
 
708
                    log.setLevel(logging.NOTSET)
 
709
                    log.info("Verbose mode: On")
 
710
            # elif (key == "end" or key == "meta >" or key == "G"
 
711
            #       or key == ">"):
 
712
            #     pass            # xxx end-of-buffer
 
713
            # elif (key == "home" or key == "meta <" or key == "g"
 
714
            #       or key == "<"):
 
715
            #     pass            # xxx beginning-of-buffer
 
716
            # elif key == "ctrl e" or key == "$":
 
717
            #     pass            # xxx move-end-of-line
 
718
            # elif key == "ctrl a" or key == "^":
 
719
            #     pass            # xxx move-beginning-of-line
 
720
            # elif key == "ctrl b" or key == "meta (" or key == "h":
 
721
            #     pass            # xxx left
 
722
            # elif key == "ctrl f" or key == "meta )" or key == "l":
 
723
            #     pass            # xxx right
 
724
            # elif key == "a":
 
725
            #     pass            # scroll up log
 
726
            # elif key == "z":
 
727
            #     pass            # scroll down log
 
728
            elif self.topwidget.selectable():
 
729
                self.topwidget.keypress(self.size, key)
 
730
                self.refresh()
 
731
        return True
 
732
 
 
733
 
 
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
ui = UserInterface()
 
748
try:
 
749
    ui.run()
 
750
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()
 
758
    raise