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

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

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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 © 2009-2015 Teddy Hogeborn
 
7
# Copyright © 2009-2015 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
 
21
# <http://www.gnu.org/licenses/>.
 
22
# 
 
23
# Contact the authors at <mandos@recompile.se>.
 
24
# 
 
25
 
 
26
from __future__ import (division, absolute_import, print_function,
 
27
                        unicode_literals)
 
28
try:
 
29
    from future_builtins import *
 
30
except ImportError:
 
31
    pass
 
32
 
 
33
import sys
 
34
import os
 
35
 
 
36
import datetime
 
37
 
 
38
import urwid.curses_display
 
39
import urwid
 
40
 
 
41
from dbus.mainloop.glib import DBusGMainLoop
 
42
try:
 
43
    import gobject
 
44
except ImportError:
 
45
    from gi.repository import GObject as gobject
 
46
 
 
47
import dbus
 
48
 
 
49
import locale
 
50
 
 
51
if sys.version_info.major == 2:
 
52
    str = unicode
 
53
 
 
54
locale.setlocale(locale.LC_ALL, '')
 
55
 
 
56
import logging
 
57
logging.getLogger('dbus.proxies').setLevel(logging.CRITICAL)
 
58
 
 
59
# Some useful constants
 
60
domain = 'se.recompile'
 
61
server_interface = domain + '.Mandos'
 
62
client_interface = domain + '.Mandos.Client'
 
63
version = "1.7.1"
 
64
 
 
65
try:
 
66
    dbus.OBJECT_MANAGER_IFACE
 
67
except AttributeError:
 
68
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
69
 
 
70
def isoformat_to_datetime(iso):
 
71
    "Parse an ISO 8601 date string to a datetime.datetime()"
 
72
    if not iso:
 
73
        return None
 
74
    d, t = iso.split("T", 1)
 
75
    year, month, day = d.split("-", 2)
 
76
    hour, minute, second = t.split(":", 2)
 
77
    second, fraction = divmod(float(second), 1)
 
78
    return datetime.datetime(int(year),
 
79
                             int(month),
 
80
                             int(day),
 
81
                             int(hour),
 
82
                             int(minute),
 
83
                             int(second),           # Whole seconds
 
84
                             int(fraction*1000000)) # Microseconds
 
85
 
 
86
class MandosClientPropertyCache(object):
 
87
    """This wraps a Mandos Client D-Bus proxy object, caches the
 
88
    properties and calls a hook function when any of them are
 
89
    changed.
 
90
    """
 
91
    def __init__(self, proxy_object=None, properties=None, **kwargs):
 
92
        self.proxy = proxy_object # Mandos Client proxy object
 
93
        self.properties = dict() if properties is None else properties
 
94
        self.property_changed_match = (
 
95
            self.proxy.connect_to_signal("PropertiesChanged",
 
96
                                         self.properties_changed,
 
97
                                         dbus.PROPERTIES_IFACE,
 
98
                                         byte_arrays=True))
 
99
        
 
100
        if properties is None:
 
101
            self.properties.update(
 
102
                self.proxy.GetAll(client_interface,
 
103
                                  dbus_interface
 
104
                                  = dbus.PROPERTIES_IFACE))
 
105
        
 
106
        super(MandosClientPropertyCache, self).__init__(**kwargs)
 
107
    
 
108
    def properties_changed(self, interface, properties, invalidated):
 
109
        """This is called whenever we get a PropertiesChanged signal
 
110
        It updates the changed properties in the "properties" dict.
 
111
        """
 
112
        # Update properties dict with new value
 
113
        if interface == client_interface:
 
114
            self.properties.update(properties)
 
115
    
 
116
    def delete(self):
 
117
        self.property_changed_match.remove()
 
118
 
 
119
 
 
120
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
 
121
    """A Mandos Client which is visible on the screen.
 
122
    """
 
123
    
 
124
    def __init__(self, server_proxy_object=None, update_hook=None,
 
125
                 delete_hook=None, logger=None, **kwargs):
 
126
        # Called on update
 
127
        self.update_hook = update_hook
 
128
        # Called on delete
 
129
        self.delete_hook = delete_hook
 
130
        # Mandos Server proxy object
 
131
        self.server_proxy_object = server_proxy_object
 
132
        # Logger
 
133
        self.logger = logger
 
134
        
 
135
        self._update_timer_callback_tag = None
 
136
        
 
137
        # The widget shown normally
 
138
        self._text_widget = urwid.Text("")
 
139
        # The widget shown when we have focus
 
140
        self._focus_text_widget = urwid.Text("")
 
141
        super(MandosClientWidget, self).__init__(**kwargs)
 
142
        self.update()
 
143
        self.opened = False
 
144
        
 
145
        self.match_objects = (
 
146
            self.proxy.connect_to_signal("CheckerCompleted",
 
147
                                         self.checker_completed,
 
148
                                         client_interface,
 
149
                                         byte_arrays=True),
 
150
            self.proxy.connect_to_signal("CheckerStarted",
 
151
                                         self.checker_started,
 
152
                                         client_interface,
 
153
                                         byte_arrays=True),
 
154
            self.proxy.connect_to_signal("GotSecret",
 
155
                                         self.got_secret,
 
156
                                         client_interface,
 
157
                                         byte_arrays=True),
 
158
            self.proxy.connect_to_signal("NeedApproval",
 
159
                                         self.need_approval,
 
160
                                         client_interface,
 
161
                                         byte_arrays=True),
 
162
            self.proxy.connect_to_signal("Rejected",
 
163
                                         self.rejected,
 
164
                                         client_interface,
 
165
                                         byte_arrays=True))
 
166
        self.logger('Created client {}'
 
167
                    .format(self.properties["Name"]), level=0)
 
168
    
 
169
    def using_timer(self, flag):
 
170
        """Call this method with True or False when timer should be
 
171
        activated or deactivated.
 
172
        """
 
173
        if flag and self._update_timer_callback_tag is None:
 
174
            # Will update the shown timer value every second
 
175
            self._update_timer_callback_tag = (gobject.timeout_add
 
176
                                               (1000,
 
177
                                                self.update_timer))
 
178
        elif not (flag or self._update_timer_callback_tag is None):
 
179
            gobject.source_remove(self._update_timer_callback_tag)
 
180
            self._update_timer_callback_tag = None
 
181
    
 
182
    def checker_completed(self, exitstatus, condition, command):
 
183
        if exitstatus == 0:
 
184
            self.logger('Checker for client {} (command "{}")'
 
185
                        ' succeeded'.format(self.properties["Name"],
 
186
                                            command), level=0)
 
187
            self.update()
 
188
            return
 
189
        # Checker failed
 
190
        if os.WIFEXITED(condition):
 
191
            self.logger('Checker for client {} (command "{}") failed'
 
192
                        ' with exit code {}'
 
193
                        .format(self.properties["Name"], command,
 
194
                                os.WEXITSTATUS(condition)))
 
195
        elif os.WIFSIGNALED(condition):
 
196
            self.logger('Checker for client {} (command "{}") was'
 
197
                        ' killed by signal {}'
 
198
                        .format(self.properties["Name"], command,
 
199
                                os.WTERMSIG(condition)))
 
200
        self.update()
 
201
    
 
202
    def checker_started(self, command):
 
203
        """Server signals that a checker started."""
 
204
        self.logger('Client {} started checker "{}"'
 
205
                    .format(self.properties["Name"],
 
206
                            command), level=0)
 
207
    
 
208
    def got_secret(self):
 
209
        self.logger('Client {} received its secret'
 
210
                    .format(self.properties["Name"]))
 
211
    
 
212
    def need_approval(self, timeout, default):
 
213
        if not default:
 
214
            message = 'Client {} needs approval within {} seconds'
 
215
        else:
 
216
            message = 'Client {} will get its secret in {} seconds'
 
217
        self.logger(message.format(self.properties["Name"],
 
218
                                   timeout/1000))
 
219
    
 
220
    def rejected(self, reason):
 
221
        self.logger('Client {} was rejected; reason: {}'
 
222
                    .format(self.properties["Name"], reason))
 
223
    
 
224
    def selectable(self):
 
225
        """Make this a "selectable" widget.
 
226
        This overrides the method from urwid.FlowWidget."""
 
227
        return True
 
228
    
 
229
    def rows(self, maxcolrow, focus=False):
 
230
        """How many rows this widget will occupy might depend on
 
231
        whether we have focus or not.
 
232
        This overrides the method from urwid.FlowWidget"""
 
233
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
 
234
    
 
235
    def current_widget(self, focus=False):
 
236
        if focus or self.opened:
 
237
            return self._focus_widget
 
238
        return self._widget
 
239
    
 
240
    def update(self):
 
241
        "Called when what is visible on the screen should be updated."
 
242
        # How to add standout mode to a style
 
243
        with_standout = { "normal": "standout",
 
244
                          "bold": "bold-standout",
 
245
                          "underline-blink":
 
246
                              "underline-blink-standout",
 
247
                          "bold-underline-blink":
 
248
                              "bold-underline-blink-standout",
 
249
                          }
 
250
        
 
251
        # Rebuild focus and non-focus widgets using current properties
 
252
        
 
253
        # Base part of a client. Name!
 
254
        base = '{name}: '.format(name=self.properties["Name"])
 
255
        if not self.properties["Enabled"]:
 
256
            message = "DISABLED"
 
257
            self.using_timer(False)
 
258
        elif self.properties["ApprovalPending"]:
 
259
            timeout = datetime.timedelta(milliseconds
 
260
                                         = self.properties
 
261
                                         ["ApprovalDelay"])
 
262
            last_approval_request = isoformat_to_datetime(
 
263
                self.properties["LastApprovalRequest"])
 
264
            if last_approval_request is not None:
 
265
                timer = max(timeout - (datetime.datetime.utcnow()
 
266
                                       - last_approval_request),
 
267
                            datetime.timedelta())
 
268
            else:
 
269
                timer = datetime.timedelta()
 
270
            if self.properties["ApprovedByDefault"]:
 
271
                message = "Approval in {}. (d)eny?"
 
272
            else:
 
273
                message = "Denial in {}. (a)pprove?"
 
274
            message = message.format(str(timer).rsplit(".", 1)[0])
 
275
            self.using_timer(True)
 
276
        elif self.properties["LastCheckerStatus"] != 0:
 
277
            # When checker has failed, show timer until client expires
 
278
            expires = self.properties["Expires"]
 
279
            if expires == "":
 
280
                timer = datetime.timedelta(0)
 
281
            else:
 
282
                expires = (datetime.datetime.strptime
 
283
                           (expires, '%Y-%m-%dT%H:%M:%S.%f'))
 
284
                timer = max(expires - datetime.datetime.utcnow(),
 
285
                            datetime.timedelta())
 
286
            message = ('A checker has failed! Time until client'
 
287
                       ' gets disabled: {}'
 
288
                       .format(str(timer).rsplit(".", 1)[0]))
 
289
            self.using_timer(True)
 
290
        else:
 
291
            message = "enabled"
 
292
            self.using_timer(False)
 
293
        self._text = "{}{}".format(base, message)
 
294
        
 
295
        if not urwid.supports_unicode():
 
296
            self._text = self._text.encode("ascii", "replace")
 
297
        textlist = [("normal", self._text)]
 
298
        self._text_widget.set_text(textlist)
 
299
        self._focus_text_widget.set_text([(with_standout[text[0]],
 
300
                                           text[1])
 
301
                                          if isinstance(text, tuple)
 
302
                                          else text
 
303
                                          for text in textlist])
 
304
        self._widget = self._text_widget
 
305
        self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
 
306
                                            "standout")
 
307
        # Run update hook, if any
 
308
        if self.update_hook is not None:
 
309
            self.update_hook()
 
310
    
 
311
    def update_timer(self):
 
312
        """called by gobject. Will indefinitely loop until
 
313
        gobject.source_remove() on tag is called"""
 
314
        self.update()
 
315
        return True             # Keep calling this
 
316
    
 
317
    def delete(self, **kwargs):
 
318
        if self._update_timer_callback_tag is not None:
 
319
            gobject.source_remove(self._update_timer_callback_tag)
 
320
            self._update_timer_callback_tag = None
 
321
        for match in self.match_objects:
 
322
            match.remove()
 
323
        self.match_objects = ()
 
324
        if self.delete_hook is not None:
 
325
            self.delete_hook(self)
 
326
        return super(MandosClientWidget, self).delete(**kwargs)
 
327
    
 
328
    def render(self, maxcolrow, focus=False):
 
329
        """Render differently if we have focus.
 
330
        This overrides the method from urwid.FlowWidget"""
 
331
        return self.current_widget(focus).render(maxcolrow,
 
332
                                                 focus=focus)
 
333
    
 
334
    def keypress(self, maxcolrow, key):
 
335
        """Handle keys.
 
336
        This overrides the method from urwid.FlowWidget"""
 
337
        if key == "+":
 
338
            self.proxy.Set(client_interface, "Enabled",
 
339
                           dbus.Boolean(True), ignore_reply = True,
 
340
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
341
        elif key == "-":
 
342
            self.proxy.Set(client_interface, "Enabled", False,
 
343
                           ignore_reply = True,
 
344
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
345
        elif key == "a":
 
346
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
 
347
                               dbus_interface = client_interface,
 
348
                               ignore_reply=True)
 
349
        elif key == "d":
 
350
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
 
351
                                  dbus_interface = client_interface,
 
352
                               ignore_reply=True)
 
353
        elif key == "R" or key == "_" or key == "ctrl k":
 
354
            self.server_proxy_object.RemoveClient(self.proxy
 
355
                                                  .object_path,
 
356
                                                  ignore_reply=True)
 
357
        elif key == "s":
 
358
            self.proxy.Set(client_interface, "CheckerRunning",
 
359
                           dbus.Boolean(True), ignore_reply = True,
 
360
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
361
        elif key == "S":
 
362
            self.proxy.Set(client_interface, "CheckerRunning",
 
363
                           dbus.Boolean(False), ignore_reply = True,
 
364
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
365
        elif key == "C":
 
366
            self.proxy.CheckedOK(dbus_interface = client_interface,
 
367
                                 ignore_reply=True)
 
368
        # xxx
 
369
#         elif key == "p" or key == "=":
 
370
#             self.proxy.pause()
 
371
#         elif key == "u" or key == ":":
 
372
#             self.proxy.unpause()
 
373
#         elif key == "RET":
 
374
#             self.open()
 
375
        else:
 
376
            return key
 
377
    
 
378
    def properties_changed(self, interface, properties, invalidated):
 
379
        """Call self.update() if any properties changed.
 
380
        This overrides the method from MandosClientPropertyCache"""
 
381
        old_values = { key: self.properties.get(key)
 
382
                       for key in properties.keys() }
 
383
        super(MandosClientWidget, self).properties_changed(
 
384
            interface, properties, invalidated)
 
385
        if any(old_values[key] != self.properties.get(key)
 
386
               for key in old_values):
 
387
            self.update()
 
388
 
 
389
 
 
390
class ConstrainedListBox(urwid.ListBox):
 
391
    """Like a normal urwid.ListBox, but will consume all "up" or
 
392
    "down" key presses, thus not allowing any containing widgets to
 
393
    use them as an excuse to shift focus away from this widget.
 
394
    """
 
395
    def keypress(self, *args, **kwargs):
 
396
        ret = super(ConstrainedListBox, self).keypress(*args, **kwargs)
 
397
        if ret in ("up", "down"):
 
398
            return
 
399
        return ret
 
400
 
 
401
 
 
402
class UserInterface(object):
 
403
    """This is the entire user interface - the whole screen
 
404
    with boxes, lists of client widgets, etc.
 
405
    """
 
406
    def __init__(self, max_log_length=1000, log_level=1):
 
407
        DBusGMainLoop(set_as_default=True)
 
408
        
 
409
        self.screen = urwid.curses_display.Screen()
 
410
        
 
411
        self.screen.register_palette((
 
412
                ("normal",
 
413
                 "default", "default", None),
 
414
                ("bold",
 
415
                 "bold", "default", "bold"),
 
416
                ("underline-blink",
 
417
                 "underline,blink", "default", "underline,blink"),
 
418
                ("standout",
 
419
                 "standout", "default", "standout"),
 
420
                ("bold-underline-blink",
 
421
                 "bold,underline,blink", "default", "bold,underline,blink"),
 
422
                ("bold-standout",
 
423
                 "bold,standout", "default", "bold,standout"),
 
424
                ("underline-blink-standout",
 
425
                 "underline,blink,standout", "default",
 
426
                 "underline,blink,standout"),
 
427
                ("bold-underline-blink-standout",
 
428
                 "bold,underline,blink,standout", "default",
 
429
                 "bold,underline,blink,standout"),
 
430
                ))
 
431
        
 
432
        if urwid.supports_unicode():
 
433
            self.divider = "─" # \u2500
 
434
            #self.divider = "━" # \u2501
 
435
        else:
 
436
            #self.divider = "-" # \u002d
 
437
            self.divider = "_" # \u005f
 
438
        
 
439
        self.screen.start()
 
440
        
 
441
        self.size = self.screen.get_cols_rows()
 
442
        
 
443
        self.clients = urwid.SimpleListWalker([])
 
444
        self.clients_dict = {}
 
445
        
 
446
        # We will add Text widgets to this list
 
447
        self.log = []
 
448
        self.max_log_length = max_log_length
 
449
        
 
450
        self.log_level = log_level
 
451
        
 
452
        # We keep a reference to the log widget so we can remove it
 
453
        # from the ListWalker without it getting destroyed
 
454
        self.logbox = ConstrainedListBox(self.log)
 
455
        
 
456
        # This keeps track of whether self.uilist currently has
 
457
        # self.logbox in it or not
 
458
        self.log_visible = True
 
459
        self.log_wrap = "any"
 
460
        
 
461
        self.rebuild()
 
462
        self.log_message_raw(("bold",
 
463
                              "Mandos Monitor version " + version))
 
464
        self.log_message_raw(("bold",
 
465
                              "q: Quit  ?: Help"))
 
466
        
 
467
        self.busname = domain + '.Mandos'
 
468
        self.main_loop = gobject.MainLoop()
 
469
    
 
470
    def client_not_found(self, fingerprint, address):
 
471
        self.log_message("Client with address {} and fingerprint {}"
 
472
                         " could not be found"
 
473
                         .format(address, fingerprint))
 
474
    
 
475
    def rebuild(self):
 
476
        """This rebuilds the User Interface.
 
477
        Call this when the widget layout needs to change"""
 
478
        self.uilist = []
 
479
        #self.uilist.append(urwid.ListBox(self.clients))
 
480
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
 
481
                                                          clients),
 
482
                                       #header=urwid.Divider(),
 
483
                                       header=None,
 
484
                                       footer=
 
485
                                       urwid.Divider(div_char=
 
486
                                                     self.divider)))
 
487
        if self.log_visible:
 
488
            self.uilist.append(self.logbox)
 
489
        self.topwidget = urwid.Pile(self.uilist)
 
490
    
 
491
    def log_message(self, message, level=1):
 
492
        """Log message formatted with timestamp"""
 
493
        if level < self.log_level:
 
494
            return
 
495
        timestamp = datetime.datetime.now().isoformat()
 
496
        self.log_message_raw("{}: {}".format(timestamp, message),
 
497
                             level=level)
 
498
    
 
499
    def log_message_raw(self, markup, level=1):
 
500
        """Add a log message to the log buffer."""
 
501
        if level < self.log_level:
 
502
            return
 
503
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
 
504
        if (self.max_log_length
 
505
            and len(self.log) > self.max_log_length):
 
506
            del self.log[0:len(self.log)-self.max_log_length-1]
 
507
        self.logbox.set_focus(len(self.logbox.body.contents),
 
508
                              coming_from="above")
 
509
        self.refresh()
 
510
    
 
511
    def toggle_log_display(self):
 
512
        """Toggle visibility of the log buffer."""
 
513
        self.log_visible = not self.log_visible
 
514
        self.rebuild()
 
515
        self.log_message("Log visibility changed to: {}"
 
516
                         .format(self.log_visible), level=0)
 
517
    
 
518
    def change_log_display(self):
 
519
        """Change type of log display.
 
520
        Currently, this toggles wrapping of text lines."""
 
521
        if self.log_wrap == "clip":
 
522
            self.log_wrap = "any"
 
523
        else:
 
524
            self.log_wrap = "clip"
 
525
        for textwidget in self.log:
 
526
            textwidget.set_wrap_mode(self.log_wrap)
 
527
        self.log_message("Wrap mode: {}".format(self.log_wrap),
 
528
                         level=0)
 
529
    
 
530
    def find_and_remove_client(self, path, interfaces):
 
531
        """Find a client by its object path and remove it.
 
532
        
 
533
        This is connected to the InterfacesRemoved signal from the
 
534
        Mandos server object."""
 
535
        if client_interface not in interfaces:
 
536
            # Not a Mandos client object; ignore
 
537
            return
 
538
        try:
 
539
            client = self.clients_dict[path]
 
540
        except KeyError:
 
541
            # not found?
 
542
            self.log_message("Unknown client {!r} removed"
 
543
                             .format(path))
 
544
            return
 
545
        client.delete()
 
546
    
 
547
    def add_new_client(self, path, ifs_and_props):
 
548
        """Find a client by its object path and remove it.
 
549
        
 
550
        This is connected to the InterfacesAdded signal from the
 
551
        Mandos server object.
 
552
        """
 
553
        if client_interface not in ifs_and_props:
 
554
            # Not a Mandos client object; ignore
 
555
            return
 
556
        client_proxy_object = self.bus.get_object(self.busname, path)
 
557
        self.add_client(MandosClientWidget(server_proxy_object
 
558
                                           =self.mandos_serv,
 
559
                                           proxy_object
 
560
                                           =client_proxy_object,
 
561
                                           update_hook
 
562
                                           =self.refresh,
 
563
                                           delete_hook
 
564
                                           =self.remove_client,
 
565
                                           logger
 
566
                                           =self.log_message,
 
567
                                           properties
 
568
                                           = dict(ifs_and_props[
 
569
                                               client_interface])),
 
570
                        path=path)
 
571
    
 
572
    def add_client(self, client, path=None):
 
573
        self.clients.append(client)
 
574
        if path is None:
 
575
            path = client.proxy.object_path
 
576
        self.clients_dict[path] = client
 
577
        self.clients.sort(key=lambda c: c.properties["Name"])
 
578
        self.refresh()
 
579
    
 
580
    def remove_client(self, client, path=None):
 
581
        self.clients.remove(client)
 
582
        if path is None:
 
583
            path = client.proxy.object_path
 
584
        del self.clients_dict[path]
 
585
        self.refresh()
 
586
    
 
587
    def refresh(self):
 
588
        """Redraw the screen"""
 
589
        canvas = self.topwidget.render(self.size, focus=True)
 
590
        self.screen.draw_screen(self.size, canvas)
 
591
    
 
592
    def run(self):
 
593
        """Start the main loop and exit when it's done."""
 
594
        self.bus = dbus.SystemBus()
 
595
        mandos_dbus_objc = self.bus.get_object(
 
596
            self.busname, "/", follow_name_owner_changes=True)
 
597
        self.mandos_serv = dbus.Interface(mandos_dbus_objc,
 
598
                                          dbus_interface
 
599
                                          = server_interface)
 
600
        try:
 
601
            mandos_clients = (self.mandos_serv
 
602
                              .GetAllClientsWithProperties())
 
603
            if not mandos_clients:
 
604
                self.log_message_raw(("bold", "Note: Server has no clients."))
 
605
        except dbus.exceptions.DBusException:
 
606
            self.log_message_raw(("bold", "Note: No Mandos server running."))
 
607
            mandos_clients = dbus.Dictionary()
 
608
        
 
609
        (self.mandos_serv
 
610
         .connect_to_signal("InterfacesRemoved",
 
611
                            self.find_and_remove_client,
 
612
                            dbus_interface
 
613
                            = dbus.OBJECT_MANAGER_IFACE,
 
614
                            byte_arrays=True))
 
615
        (self.mandos_serv
 
616
         .connect_to_signal("InterfacesAdded",
 
617
                            self.add_new_client,
 
618
                            dbus_interface
 
619
                            = dbus.OBJECT_MANAGER_IFACE,
 
620
                            byte_arrays=True))
 
621
        (self.mandos_serv
 
622
         .connect_to_signal("ClientNotFound",
 
623
                            self.client_not_found,
 
624
                            dbus_interface=server_interface,
 
625
                            byte_arrays=True))
 
626
        for path, client in mandos_clients.items():
 
627
            client_proxy_object = self.bus.get_object(self.busname,
 
628
                                                      path)
 
629
            self.add_client(MandosClientWidget(server_proxy_object
 
630
                                               =self.mandos_serv,
 
631
                                               proxy_object
 
632
                                               =client_proxy_object,
 
633
                                               properties=client,
 
634
                                               update_hook
 
635
                                               =self.refresh,
 
636
                                               delete_hook
 
637
                                               =self.remove_client,
 
638
                                               logger
 
639
                                               =self.log_message),
 
640
                            path=path)
 
641
        
 
642
        self.refresh()
 
643
        self._input_callback_tag = (gobject.io_add_watch
 
644
                                    (sys.stdin.fileno(),
 
645
                                     gobject.IO_IN,
 
646
                                     self.process_input))
 
647
        self.main_loop.run()
 
648
        # Main loop has finished, we should close everything now
 
649
        gobject.source_remove(self._input_callback_tag)
 
650
        self.screen.stop()
 
651
    
 
652
    def stop(self):
 
653
        self.main_loop.quit()
 
654
    
 
655
    def process_input(self, source, condition):
 
656
        keys = self.screen.get_input()
 
657
        translations = { "ctrl n": "down",      # Emacs
 
658
                         "ctrl p": "up",        # Emacs
 
659
                         "ctrl v": "page down", # Emacs
 
660
                         "meta v": "page up",   # Emacs
 
661
                         " ": "page down",      # less
 
662
                         "f": "page down",      # less
 
663
                         "b": "page up",        # less
 
664
                         "j": "down",           # vi
 
665
                         "k": "up",             # vi
 
666
                         }
 
667
        for key in keys:
 
668
            try:
 
669
                key = translations[key]
 
670
            except KeyError:    # :-)
 
671
                pass
 
672
            
 
673
            if key == "q" or key == "Q":
 
674
                self.stop()
 
675
                break
 
676
            elif key == "window resize":
 
677
                self.size = self.screen.get_cols_rows()
 
678
                self.refresh()
 
679
            elif key == "ctrl l":
 
680
                self.screen.clear()
 
681
                self.refresh()
 
682
            elif key == "l" or key == "D":
 
683
                self.toggle_log_display()
 
684
                self.refresh()
 
685
            elif key == "w" or key == "i":
 
686
                self.change_log_display()
 
687
                self.refresh()
 
688
            elif key == "?" or key == "f1" or key == "esc":
 
689
                if not self.log_visible:
 
690
                    self.log_visible = True
 
691
                    self.rebuild()
 
692
                self.log_message_raw(("bold",
 
693
                                      "  ".
 
694
                                      join(("q: Quit",
 
695
                                            "?: Help",
 
696
                                            "l: Log window toggle",
 
697
                                            "TAB: Switch window",
 
698
                                            "w: Wrap (log lines)",
 
699
                                            "v: Toggle verbose log",
 
700
                                            ))))
 
701
                self.log_message_raw(("bold",
 
702
                                      "  "
 
703
                                      .join(("Clients:",
 
704
                                             "+: Enable",
 
705
                                             "-: Disable",
 
706
                                             "R: Remove",
 
707
                                             "s: Start new checker",
 
708
                                             "S: Stop checker",
 
709
                                             "C: Checker OK",
 
710
                                             "a: Approve",
 
711
                                             "d: Deny"))))
 
712
                self.refresh()
 
713
            elif key == "tab":
 
714
                if self.topwidget.get_focus() is self.logbox:
 
715
                    self.topwidget.set_focus(0)
 
716
                else:
 
717
                    self.topwidget.set_focus(self.logbox)
 
718
                self.refresh()
 
719
            elif key == "v":
 
720
                if self.log_level == 0:
 
721
                    self.log_level = 1
 
722
                    self.log_message("Verbose mode: Off")
 
723
                else:
 
724
                    self.log_level = 0
 
725
                    self.log_message("Verbose mode: On")
 
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 as e:
 
755
    ui.log_message(str(e))
 
756
    ui.screen.stop()
 
757
    raise