/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2008-09-17 00:34:09 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080917003409-bxbjsc4o69nx40t6
* .bzr-builddeb/default.conf: New.

* Makefile (install-server): Do not create directories that
                             should already be present in a
                             normal system.
  (install-client-nokey): - '' -  Also specify non-executable
                          mode for "initramfs-tools-hook-conf".

* README: Improved wording.  Use real copyright mark.

* debian/changelog: New.
* debian/compat: - '' -
* debian/control: - '' -
* debian/copyright: - '' -
* debian/mandos-client.README.Debian: - '' -
* debian/mandos-client.dirs: - '' -
* debian/mandos-client.lintian-overrides: - '' -
* debian/mandos-client.postinst: - '' -
* debian/mandos-client.postrm: - '' -
* debian/mandos.dirs: - '' -
* debian/mandos.lintian-overrides: - '' -
* debian/rules: - '' -
* default-mandos: - '' -

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mandos-monitor
1
 
#!/usr/bin/python
2
 
# -*- mode: python; coding: utf-8 -*-
3
 
# 
4
 
# Mandos Monitor - Control and monitor the Mandos server
5
 
# 
6
 
# Copyright © 2009-2011 Teddy Hogeborn
7
 
# Copyright © 2009-2011 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
11
 
# the Free Software Foundation, either version 3 of the License, or
12
 
# (at your option) any later version.
13
 
#
14
 
#     This program is distributed in the hope that it will be useful,
15
 
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
16
 
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17
 
#     GNU General Public License for more details.
18
 
# 
19
 
# You should have received a copy of the GNU General Public License
20
 
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
21
 
# 
22
 
# Contact the authors at <mandos@fukt.bsnet.se>.
23
 
# 
24
 
 
25
 
from __future__ import (division, absolute_import, print_function,
26
 
                        unicode_literals)
27
 
 
28
 
import sys
29
 
import os
30
 
import signal
31
 
 
32
 
import datetime
33
 
 
34
 
import urwid.curses_display
35
 
import urwid
36
 
 
37
 
from dbus.mainloop.glib import DBusGMainLoop
38
 
import gobject
39
 
 
40
 
import dbus
41
 
 
42
 
import UserList
43
 
 
44
 
import locale
45
 
 
46
 
locale.setlocale(locale.LC_ALL, '')
47
 
 
48
 
import logging
49
 
logging.getLogger('dbus.proxies').setLevel(logging.CRITICAL)
50
 
 
51
 
# Some useful constants
52
 
domain = 'se.bsnet.fukt'
53
 
server_interface = domain + '.Mandos'
54
 
client_interface = domain + '.Mandos.Client'
55
 
version = "1.3.1"
56
 
 
57
 
# Always run in monochrome mode
58
 
urwid.curses_display.curses.has_colors = lambda : False
59
 
 
60
 
# Urwid doesn't support blinking, but we want it.  Since we have no
61
 
# use for underline on its own, we make underline also always blink.
62
 
urwid.curses_display.curses.A_UNDERLINE |= (
63
 
    urwid.curses_display.curses.A_BLINK)
64
 
 
65
 
def isoformat_to_datetime(iso):
66
 
    "Parse an ISO 8601 date string to a datetime.datetime()"
67
 
    if not iso:
68
 
        return None
69
 
    d, t = iso.split("T", 1)
70
 
    year, month, day = d.split("-", 2)
71
 
    hour, minute, second = t.split(":", 2)
72
 
    second, fraction = divmod(float(second), 1)
73
 
    return datetime.datetime(int(year),
74
 
                             int(month),
75
 
                             int(day),
76
 
                             int(hour),
77
 
                             int(minute),
78
 
                             int(second),           # Whole seconds
79
 
                             int(fraction*1000000)) # Microseconds
80
 
 
81
 
class MandosClientPropertyCache(object):
82
 
    """This wraps a Mandos Client D-Bus proxy object, caches the
83
 
    properties and calls a hook function when any of them are
84
 
    changed.
85
 
    """
86
 
    def __init__(self, proxy_object=None, *args, **kwargs):
87
 
        self.proxy = proxy_object # Mandos Client proxy object
88
 
        
89
 
        self.properties = dict()
90
 
        self.property_changed_match = (
91
 
            self.proxy.connect_to_signal("PropertyChanged",
92
 
                                         self.property_changed,
93
 
                                         client_interface,
94
 
                                         byte_arrays=True))
95
 
        
96
 
        self.properties.update(
97
 
            self.proxy.GetAll(client_interface,
98
 
                              dbus_interface = dbus.PROPERTIES_IFACE))
99
 
 
100
 
        #XXX This breaks good super behaviour
101
 
#        super(MandosClientPropertyCache, self).__init__(
102
 
#            *args, **kwargs)
103
 
    
104
 
    def property_changed(self, property=None, value=None):
105
 
        """This is called whenever we get a PropertyChanged signal
106
 
        It updates the changed property in the "properties" dict.
107
 
        """
108
 
        # Update properties dict with new value
109
 
        self.properties[property] = value
110
 
    
111
 
    def delete(self, *args, **kwargs):
112
 
        self.property_changed_match.remove()
113
 
        super(MandosClientPropertyCache, self).__init__(
114
 
            *args, **kwargs)
115
 
 
116
 
 
117
 
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
118
 
    """A Mandos Client which is visible on the screen.
119
 
    """
120
 
    
121
 
    def __init__(self, server_proxy_object=None, update_hook=None,
122
 
                 delete_hook=None, logger=None, *args, **kwargs):
123
 
        # Called on update
124
 
        self.update_hook = update_hook
125
 
        # Called on delete
126
 
        self.delete_hook = delete_hook
127
 
        # Mandos Server proxy object
128
 
        self.server_proxy_object = server_proxy_object
129
 
        # Logger
130
 
        self.logger = logger
131
 
        
132
 
        self._update_timer_callback_tag = None
133
 
        self._update_timer_callback_lock = 0
134
 
        self.last_checker_failed = False
135
 
        
136
 
        # The widget shown normally
137
 
        self._text_widget = urwid.Text("")
138
 
        # The widget shown when we have focus
139
 
        self._focus_text_widget = urwid.Text("")
140
 
        super(MandosClientWidget, self).__init__(
141
 
            update_hook=update_hook, delete_hook=delete_hook,
142
 
            *args, **kwargs)
143
 
        self.update()
144
 
        self.opened = False
145
 
        
146
 
        last_checked_ok = isoformat_to_datetime(self.properties
147
 
                                                ["LastCheckedOK"])
148
 
        if last_checked_ok is None:
149
 
            self.last_checker_failed = True
150
 
        else:
151
 
            self.last_checker_failed = ((datetime.datetime.utcnow()
152
 
                                         - last_checked_ok)
153
 
                                        > datetime.timedelta
154
 
                                        (milliseconds=
155
 
                                         self.properties
156
 
                                         ["Interval"]))
157
 
        
158
 
        if self.last_checker_failed:
159
 
            self.using_timer(True)
160
 
        
161
 
        if self.need_approval:
162
 
            self.using_timer(True)
163
 
        
164
 
        self.match_objects = (
165
 
            self.proxy.connect_to_signal("CheckerCompleted",
166
 
                                         self.checker_completed,
167
 
                                         client_interface,
168
 
                                         byte_arrays=True),
169
 
            self.proxy.connect_to_signal("CheckerStarted",
170
 
                                         self.checker_started,
171
 
                                         client_interface,
172
 
                                         byte_arrays=True),
173
 
            self.proxy.connect_to_signal("GotSecret",
174
 
                                         self.got_secret,
175
 
                                         client_interface,
176
 
                                         byte_arrays=True),
177
 
            self.proxy.connect_to_signal("NeedApproval",
178
 
                                         self.need_approval,
179
 
                                         client_interface,
180
 
                                         byte_arrays=True),
181
 
            self.proxy.connect_to_signal("Rejected",
182
 
                                         self.rejected,
183
 
                                         client_interface,
184
 
                                         byte_arrays=True))
185
 
        #self.logger('Created client %s' % (self.properties["Name"]))
186
 
    
187
 
    def property_changed(self, property=None, value=None):
188
 
        super(self, MandosClientWidget).property_changed(property,
189
 
                                                         value)
190
 
        if property == "ApprovalPending":
191
 
            using_timer(bool(value))
192
 
        
193
 
    def using_timer(self, flag):
194
 
        """Call this method with True or False when timer should be
195
 
        activated or deactivated.
196
 
        """
197
 
        old = self._update_timer_callback_lock
198
 
        if flag:
199
 
            self._update_timer_callback_lock += 1
200
 
        else:
201
 
            self._update_timer_callback_lock -= 1
202
 
        if old == 0 and self._update_timer_callback_lock:
203
 
            # Will update the shown timer value every second
204
 
            self._update_timer_callback_tag = (gobject.timeout_add
205
 
                                               (1000,
206
 
                                                self.update_timer))
207
 
        elif old and self._update_timer_callback_lock == 0:
208
 
            gobject.source_remove(self._update_timer_callback_tag)
209
 
            self._update_timer_callback_tag = None
210
 
    
211
 
    def checker_completed(self, exitstatus, condition, command):
212
 
        if exitstatus == 0:
213
 
            if self.last_checker_failed:
214
 
                self.last_checker_failed = False
215
 
                self.using_timer(False)
216
 
            #self.logger('Checker for client %s (command "%s")'
217
 
            #            ' was successful'
218
 
            #            % (self.properties["Name"], command))
219
 
            self.update()
220
 
            return
221
 
        # Checker failed
222
 
        if not self.last_checker_failed:
223
 
            self.last_checker_failed = True
224
 
            self.using_timer(True)
225
 
        if os.WIFEXITED(condition):
226
 
            self.logger('Checker for client %s (command "%s")'
227
 
                        ' failed with exit code %s'
228
 
                        % (self.properties["Name"], command,
229
 
                           os.WEXITSTATUS(condition)))
230
 
        elif os.WIFSIGNALED(condition):
231
 
            self.logger('Checker for client %s (command "%s")'
232
 
                        ' was killed by signal %s'
233
 
                        % (self.properties["Name"], command,
234
 
                           os.WTERMSIG(condition)))
235
 
        elif os.WCOREDUMP(condition):
236
 
            self.logger('Checker for client %s (command "%s")'
237
 
                        ' dumped core'
238
 
                        % (self.properties["Name"], command))
239
 
        else:
240
 
            self.logger('Checker for client %s completed'
241
 
                        ' mysteriously')
242
 
        self.update()
243
 
    
244
 
    def checker_started(self, command):
245
 
        #self.logger('Client %s started checker "%s"'
246
 
        #            % (self.properties["Name"], unicode(command)))
247
 
        pass
248
 
    
249
 
    def got_secret(self):
250
 
        self.last_checker_failed = False
251
 
        self.logger('Client %s received its secret'
252
 
                    % self.properties["Name"])
253
 
    
254
 
    def need_approval(self, timeout, default):
255
 
        if not default:
256
 
            message = 'Client %s needs approval within %s seconds'
257
 
        else:
258
 
            message = 'Client %s will get its secret in %s seconds'
259
 
        self.logger(message
260
 
                    % (self.properties["Name"], timeout/1000))
261
 
        self.using_timer(True)
262
 
    
263
 
    def rejected(self, reason):
264
 
        self.logger('Client %s was rejected; reason: %s'
265
 
                    % (self.properties["Name"], reason))
266
 
    
267
 
    def selectable(self):
268
 
        """Make this a "selectable" widget.
269
 
        This overrides the method from urwid.FlowWidget."""
270
 
        return True
271
 
    
272
 
    def rows(self, maxcolrow, focus=False):
273
 
        """How many rows this widget will occupy might depend on
274
 
        whether we have focus or not.
275
 
        This overrides the method from urwid.FlowWidget"""
276
 
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
277
 
    
278
 
    def current_widget(self, focus=False):
279
 
        if focus or self.opened:
280
 
            return self._focus_widget
281
 
        return self._widget
282
 
    
283
 
    def update(self):
284
 
        "Called when what is visible on the screen should be updated."
285
 
        # How to add standout mode to a style
286
 
        with_standout = { "normal": "standout",
287
 
                          "bold": "bold-standout",
288
 
                          "underline-blink":
289
 
                              "underline-blink-standout",
290
 
                          "bold-underline-blink":
291
 
                              "bold-underline-blink-standout",
292
 
                          }
293
 
 
294
 
        # Rebuild focus and non-focus widgets using current properties
295
 
 
296
 
        # Base part of a client. Name!
297
 
        base = ('%(name)s: '
298
 
                      % {"name": self.properties["Name"]})
299
 
        if not self.properties["Enabled"]:
300
 
            message = "DISABLED"
301
 
        elif self.properties["ApprovalPending"]:
302
 
            timeout = datetime.timedelta(milliseconds
303
 
                                         = self.properties
304
 
                                         ["ApprovalDelay"])
305
 
            last_approval_request = isoformat_to_datetime(
306
 
                self.properties["LastApprovalRequest"])
307
 
            if last_approval_request is not None:
308
 
                timer = timeout - (datetime.datetime.utcnow()
309
 
                                   - last_approval_request)
310
 
            else:
311
 
                timer = datetime.timedelta()
312
 
            if self.properties["ApprovedByDefault"]:
313
 
                message = "Approval in %s. (d)eny?"
314
 
            else:
315
 
                message = "Denial in %s. (a)pprove?"
316
 
            message = message % unicode(timer).rsplit(".", 1)[0]
317
 
        elif self.last_checker_failed:
318
 
            # When checker has failed, print a timer until client expires
319
 
            expires = self.properties["Expires"]
320
 
            if expires == "":
321
 
                timer = datetime.timedelta(0)
322
 
            else:
323
 
                expires = datetime.datetime.strptime(expires,
324
 
                                                     '%Y-%m-%dT%H:%M:%S.%f')
325
 
                timer = expires - datetime.datetime.utcnow()
326
 
            message = ('A checker has failed! Time until client'
327
 
                       ' gets disabled: %s'
328
 
                           % unicode(timer).rsplit(".", 1)[0])
329
 
        else:
330
 
            message = "enabled"
331
 
        self._text = "%s%s" % (base, message)
332
 
            
333
 
        if not urwid.supports_unicode():
334
 
            self._text = self._text.encode("ascii", "replace")
335
 
        textlist = [("normal", self._text)]
336
 
        self._text_widget.set_text(textlist)
337
 
        self._focus_text_widget.set_text([(with_standout[text[0]],
338
 
                                           text[1])
339
 
                                          if isinstance(text, tuple)
340
 
                                          else text
341
 
                                          for text in textlist])
342
 
        self._widget = self._text_widget
343
 
        self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
344
 
                                            "standout")
345
 
        # Run update hook, if any
346
 
        if self.update_hook is not None:
347
 
            self.update_hook()
348
 
    
349
 
    def update_timer(self):
350
 
        """called by gobject. Will indefinitely loop until
351
 
        gobject.source_remove() on tag is called"""
352
 
        self.update()
353
 
        return True             # Keep calling this
354
 
    
355
 
    def delete(self, *args, **kwargs):
356
 
        if self._update_timer_callback_tag is not None:
357
 
            gobject.source_remove(self._update_timer_callback_tag)
358
 
            self._update_timer_callback_tag = None
359
 
        for match in self.match_objects:
360
 
            match.remove()
361
 
        self.match_objects = ()
362
 
        if self.delete_hook is not None:
363
 
            self.delete_hook(self)
364
 
        return super(MandosClientWidget, self).delete(*args, **kwargs)
365
 
    
366
 
    def render(self, maxcolrow, focus=False):
367
 
        """Render differently if we have focus.
368
 
        This overrides the method from urwid.FlowWidget"""
369
 
        return self.current_widget(focus).render(maxcolrow,
370
 
                                                 focus=focus)
371
 
    
372
 
    def keypress(self, maxcolrow, key):
373
 
        """Handle keys.
374
 
        This overrides the method from urwid.FlowWidget"""
375
 
        if key == "+":
376
 
            self.proxy.Enable(dbus_interface = client_interface,
377
 
                              ignore_reply=True)
378
 
        elif key == "-":
379
 
            self.proxy.Disable(dbus_interface = client_interface,
380
 
                               ignore_reply=True)
381
 
        elif key == "a":
382
 
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
383
 
                               dbus_interface = client_interface,
384
 
                               ignore_reply=True)
385
 
        elif key == "d":
386
 
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
387
 
                                  dbus_interface = client_interface,
388
 
                               ignore_reply=True)
389
 
        elif key == "R" or key == "_" or key == "ctrl k":
390
 
            self.server_proxy_object.RemoveClient(self.proxy
391
 
                                                  .object_path,
392
 
                                                  ignore_reply=True)
393
 
        elif key == "s":
394
 
            self.proxy.StartChecker(dbus_interface = client_interface,
395
 
                                    ignore_reply=True)
396
 
        elif key == "S":
397
 
            self.proxy.StopChecker(dbus_interface = client_interface,
398
 
                                   ignore_reply=True)
399
 
        elif key == "C":
400
 
            self.proxy.CheckedOK(dbus_interface = client_interface,
401
 
                                 ignore_reply=True)
402
 
        # xxx
403
 
#         elif key == "p" or key == "=":
404
 
#             self.proxy.pause()
405
 
#         elif key == "u" or key == ":":
406
 
#             self.proxy.unpause()
407
 
#         elif key == "RET":
408
 
#             self.open()
409
 
        else:
410
 
            return key
411
 
    
412
 
    def property_changed(self, property=None, value=None,
413
 
                         *args, **kwargs):
414
 
        """Call self.update() if old value is not new value.
415
 
        This overrides the method from MandosClientPropertyCache"""
416
 
        property_name = unicode(property)
417
 
        old_value = self.properties.get(property_name)
418
 
        super(MandosClientWidget, self).property_changed(
419
 
            property=property, value=value, *args, **kwargs)
420
 
        if self.properties.get(property_name) != old_value:
421
 
            self.update()
422
 
 
423
 
 
424
 
class ConstrainedListBox(urwid.ListBox):
425
 
    """Like a normal urwid.ListBox, but will consume all "up" or
426
 
    "down" key presses, thus not allowing any containing widgets to
427
 
    use them as an excuse to shift focus away from this widget.
428
 
    """
429
 
    def keypress(self, maxcolrow, key):
430
 
        ret = super(ConstrainedListBox, self).keypress(maxcolrow, key)
431
 
        if ret in ("up", "down"):
432
 
            return
433
 
        return ret
434
 
 
435
 
 
436
 
class UserInterface(object):
437
 
    """This is the entire user interface - the whole screen
438
 
    with boxes, lists of client widgets, etc.
439
 
    """
440
 
    def __init__(self, max_log_length=1000):
441
 
        DBusGMainLoop(set_as_default=True)
442
 
        
443
 
        self.screen = urwid.curses_display.Screen()
444
 
        
445
 
        self.screen.register_palette((
446
 
                ("normal",
447
 
                 "default", "default", None),
448
 
                ("bold",
449
 
                 "default", "default", "bold"),
450
 
                ("underline-blink",
451
 
                 "default", "default", "underline"),
452
 
                ("standout",
453
 
                 "default", "default", "standout"),
454
 
                ("bold-underline-blink",
455
 
                 "default", "default", ("bold", "underline")),
456
 
                ("bold-standout",
457
 
                 "default", "default", ("bold", "standout")),
458
 
                ("underline-blink-standout",
459
 
                 "default", "default", ("underline", "standout")),
460
 
                ("bold-underline-blink-standout",
461
 
                 "default", "default", ("bold", "underline",
462
 
                                          "standout")),
463
 
                ))
464
 
        
465
 
        if urwid.supports_unicode():
466
 
            self.divider = "─" # \u2500
467
 
            #self.divider = "━" # \u2501
468
 
        else:
469
 
            #self.divider = "-" # \u002d
470
 
            self.divider = "_" # \u005f
471
 
        
472
 
        self.screen.start()
473
 
        
474
 
        self.size = self.screen.get_cols_rows()
475
 
        
476
 
        self.clients = urwid.SimpleListWalker([])
477
 
        self.clients_dict = {}
478
 
        
479
 
        # We will add Text widgets to this list
480
 
        self.log = []
481
 
        self.max_log_length = max_log_length
482
 
        
483
 
        # We keep a reference to the log widget so we can remove it
484
 
        # from the ListWalker without it getting destroyed
485
 
        self.logbox = ConstrainedListBox(self.log)
486
 
        
487
 
        # This keeps track of whether self.uilist currently has
488
 
        # self.logbox in it or not
489
 
        self.log_visible = True
490
 
        self.log_wrap = "any"
491
 
        
492
 
        self.rebuild()
493
 
        self.log_message_raw(("bold",
494
 
                              "Mandos Monitor version " + version))
495
 
        self.log_message_raw(("bold",
496
 
                              "q: Quit  ?: Help"))
497
 
        
498
 
        self.busname = domain + '.Mandos'
499
 
        self.main_loop = gobject.MainLoop()
500
 
        self.bus = dbus.SystemBus()
501
 
        mandos_dbus_objc = self.bus.get_object(
502
 
            self.busname, "/", follow_name_owner_changes=True)
503
 
        self.mandos_serv = dbus.Interface(mandos_dbus_objc,
504
 
                                          dbus_interface
505
 
                                          = server_interface)
506
 
        try:
507
 
            mandos_clients = (self.mandos_serv
508
 
                              .GetAllClientsWithProperties())
509
 
        except dbus.exceptions.DBusException:
510
 
            mandos_clients = dbus.Dictionary()
511
 
        
512
 
        (self.mandos_serv
513
 
         .connect_to_signal("ClientRemoved",
514
 
                            self.find_and_remove_client,
515
 
                            dbus_interface=server_interface,
516
 
                            byte_arrays=True))
517
 
        (self.mandos_serv
518
 
         .connect_to_signal("ClientAdded",
519
 
                            self.add_new_client,
520
 
                            dbus_interface=server_interface,
521
 
                            byte_arrays=True))
522
 
        (self.mandos_serv
523
 
         .connect_to_signal("ClientNotFound",
524
 
                            self.client_not_found,
525
 
                            dbus_interface=server_interface,
526
 
                            byte_arrays=True))
527
 
        for path, client in mandos_clients.iteritems():
528
 
            client_proxy_object = self.bus.get_object(self.busname,
529
 
                                                      path)
530
 
            self.add_client(MandosClientWidget(server_proxy_object
531
 
                                               =self.mandos_serv,
532
 
                                               proxy_object
533
 
                                               =client_proxy_object,
534
 
                                               properties=client,
535
 
                                               update_hook
536
 
                                               =self.refresh,
537
 
                                               delete_hook
538
 
                                               =self.remove_client,
539
 
                                               logger
540
 
                                               =self.log_message),
541
 
                            path=path)
542
 
    
543
 
    def client_not_found(self, fingerprint, address):
544
 
        self.log_message(("Client with address %s and fingerprint %s"
545
 
                          " could not be found" % (address,
546
 
                                                    fingerprint)))
547
 
    
548
 
    def rebuild(self):
549
 
        """This rebuilds the User Interface.
550
 
        Call this when the widget layout needs to change"""
551
 
        self.uilist = []
552
 
        #self.uilist.append(urwid.ListBox(self.clients))
553
 
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
554
 
                                                          clients),
555
 
                                       #header=urwid.Divider(),
556
 
                                       header=None,
557
 
                                       footer=
558
 
                                       urwid.Divider(div_char=
559
 
                                                     self.divider)))
560
 
        if self.log_visible:
561
 
            self.uilist.append(self.logbox)
562
 
            pass
563
 
        self.topwidget = urwid.Pile(self.uilist)
564
 
    
565
 
    def log_message(self, message):
566
 
        timestamp = datetime.datetime.now().isoformat()
567
 
        self.log_message_raw(timestamp + ": " + message)
568
 
    
569
 
    def log_message_raw(self, markup):
570
 
        """Add a log message to the log buffer."""
571
 
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
572
 
        if (self.max_log_length
573
 
            and len(self.log) > self.max_log_length):
574
 
            del self.log[0:len(self.log)-self.max_log_length-1]
575
 
        self.logbox.set_focus(len(self.logbox.body.contents),
576
 
                              coming_from="above")
577
 
        self.refresh()
578
 
    
579
 
    def toggle_log_display(self):
580
 
        """Toggle visibility of the log buffer."""
581
 
        self.log_visible = not self.log_visible
582
 
        self.rebuild()
583
 
        #self.log_message("Log visibility changed to: "
584
 
        #                 + unicode(self.log_visible))
585
 
    
586
 
    def change_log_display(self):
587
 
        """Change type of log display.
588
 
        Currently, this toggles wrapping of text lines."""
589
 
        if self.log_wrap == "clip":
590
 
            self.log_wrap = "any"
591
 
        else:
592
 
            self.log_wrap = "clip"
593
 
        for textwidget in self.log:
594
 
            textwidget.set_wrap_mode(self.log_wrap)
595
 
        #self.log_message("Wrap mode: " + self.log_wrap)
596
 
    
597
 
    def find_and_remove_client(self, path, name):
598
 
        """Find a client by its object path and remove it.
599
 
        
600
 
        This is connected to the ClientRemoved signal from the
601
 
        Mandos server object."""
602
 
        try:
603
 
            client = self.clients_dict[path]
604
 
        except KeyError:
605
 
            # not found?
606
 
            self.log_message("Unknown client %r (%r) removed", name,
607
 
                             path)
608
 
            return
609
 
        client.delete()
610
 
    
611
 
    def add_new_client(self, path):
612
 
        client_proxy_object = self.bus.get_object(self.busname, path)
613
 
        self.add_client(MandosClientWidget(server_proxy_object
614
 
                                           =self.mandos_serv,
615
 
                                           proxy_object
616
 
                                           =client_proxy_object,
617
 
                                           update_hook
618
 
                                           =self.refresh,
619
 
                                           delete_hook
620
 
                                           =self.remove_client,
621
 
                                           logger
622
 
                                           =self.log_message),
623
 
                        path=path)
624
 
    
625
 
    def add_client(self, client, path=None):
626
 
        self.clients.append(client)
627
 
        if path is None:
628
 
            path = client.proxy.object_path
629
 
        self.clients_dict[path] = client
630
 
        self.clients.sort(None, lambda c: c.properties["Name"])
631
 
        self.refresh()
632
 
    
633
 
    def remove_client(self, client, path=None):
634
 
        self.clients.remove(client)
635
 
        if path is None:
636
 
            path = client.proxy.object_path
637
 
        del self.clients_dict[path]
638
 
        if not self.clients_dict:
639
 
            # Work around bug in Urwid 0.9.8.3 - if a SimpleListWalker
640
 
            # is completely emptied, we need to recreate it.
641
 
            self.clients = urwid.SimpleListWalker([])
642
 
            self.rebuild()
643
 
        self.refresh()
644
 
    
645
 
    def refresh(self):
646
 
        """Redraw the screen"""
647
 
        canvas = self.topwidget.render(self.size, focus=True)
648
 
        self.screen.draw_screen(self.size, canvas)
649
 
    
650
 
    def run(self):
651
 
        """Start the main loop and exit when it's done."""
652
 
        self.refresh()
653
 
        self._input_callback_tag = (gobject.io_add_watch
654
 
                                    (sys.stdin.fileno(),
655
 
                                     gobject.IO_IN,
656
 
                                     self.process_input))
657
 
        self.main_loop.run()
658
 
        # Main loop has finished, we should close everything now
659
 
        gobject.source_remove(self._input_callback_tag)
660
 
        self.screen.stop()
661
 
    
662
 
    def stop(self):
663
 
        self.main_loop.quit()
664
 
    
665
 
    def process_input(self, source, condition):
666
 
        keys = self.screen.get_input()
667
 
        translations = { "ctrl n": "down",      # Emacs
668
 
                         "ctrl p": "up",        # Emacs
669
 
                         "ctrl v": "page down", # Emacs
670
 
                         "meta v": "page up",   # Emacs
671
 
                         " ": "page down",      # less
672
 
                         "f": "page down",      # less
673
 
                         "b": "page up",        # less
674
 
                         "j": "down",           # vi
675
 
                         "k": "up",             # vi
676
 
                         }
677
 
        for key in keys:
678
 
            try:
679
 
                key = translations[key]
680
 
            except KeyError:    # :-)
681
 
                pass
682
 
            
683
 
            if key == "q" or key == "Q":
684
 
                self.stop()
685
 
                break
686
 
            elif key == "window resize":
687
 
                self.size = self.screen.get_cols_rows()
688
 
                self.refresh()
689
 
            elif key == "\f":  # Ctrl-L
690
 
                self.refresh()
691
 
            elif key == "l" or key == "D":
692
 
                self.toggle_log_display()
693
 
                self.refresh()
694
 
            elif key == "w" or key == "i":
695
 
                self.change_log_display()
696
 
                self.refresh()
697
 
            elif key == "?" or key == "f1" or key == "esc":
698
 
                if not self.log_visible:
699
 
                    self.log_visible = True
700
 
                    self.rebuild()
701
 
                self.log_message_raw(("bold",
702
 
                                      "  ".
703
 
                                      join(("q: Quit",
704
 
                                            "?: Help",
705
 
                                            "l: Log window toggle",
706
 
                                            "TAB: Switch window",
707
 
                                            "w: Wrap (log)"))))
708
 
                self.log_message_raw(("bold",
709
 
                                      "  "
710
 
                                      .join(("Clients:",
711
 
                                             "+: Enable",
712
 
                                             "-: Disable",
713
 
                                             "R: Remove",
714
 
                                             "s: Start new checker",
715
 
                                             "S: Stop checker",
716
 
                                             "C: Checker OK",
717
 
                                             "a: Approve",
718
 
                                             "d: Deny"))))
719
 
                self.refresh()
720
 
            elif key == "tab":
721
 
                if self.topwidget.get_focus() is self.logbox:
722
 
                    self.topwidget.set_focus(0)
723
 
                else:
724
 
                    self.topwidget.set_focus(self.logbox)
725
 
                self.refresh()
726
 
            #elif (key == "end" or key == "meta >" or key == "G"
727
 
            #      or key == ">"):
728
 
            #    pass            # xxx end-of-buffer
729
 
            #elif (key == "home" or key == "meta <" or key == "g"
730
 
            #      or key == "<"):
731
 
            #    pass            # xxx beginning-of-buffer
732
 
            #elif key == "ctrl e" or key == "$":
733
 
            #    pass            # xxx move-end-of-line
734
 
            #elif key == "ctrl a" or key == "^":
735
 
            #    pass            # xxx move-beginning-of-line
736
 
            #elif key == "ctrl b" or key == "meta (" or key == "h":
737
 
            #    pass            # xxx left
738
 
            #elif key == "ctrl f" or key == "meta )" or key == "l":
739
 
            #    pass            # xxx right
740
 
            #elif key == "a":
741
 
            #    pass            # scroll up log
742
 
            #elif key == "z":
743
 
            #    pass            # scroll down log
744
 
            elif self.topwidget.selectable():
745
 
                self.topwidget.keypress(self.size, key)
746
 
                self.refresh()
747
 
        return True
748
 
 
749
 
ui = UserInterface()
750
 
try:
751
 
    ui.run()
752
 
except KeyboardInterrupt:
753
 
    ui.screen.stop()
754
 
except Exception, e:
755
 
    ui.log_message(unicode(e))
756
 
    ui.screen.stop()
757
 
    raise