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# -*- mode: python; coding: utf-8 -*-
 
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# Mandos Monitor - Control and monitor the Mandos server
 
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# Copyright © 2009-2016 Teddy Hogeborn
 
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# Copyright © 2009-2016 Björn Påhlsson
 
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# This program is free software: you can redistribute it and/or modify
 
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# it under the terms of the GNU General Public License as published by
 
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# the Free Software Foundation, either version 3 of the License, or
 
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# (at your option) any later version.
 
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#     This program is distributed in the hope that it will be useful,
 
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#     but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
17
 
#     GNU General Public License for more details.
 
19
 
# You should have received a copy of the GNU General Public License
 
20
 
# along with this program.  If not, see
 
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# <http://www.gnu.org/licenses/>.
 
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# Contact the authors at <mandos@recompile.se>.
 
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from __future__ import (division, absolute_import, print_function,
 
29
 
    from future_builtins import *
 
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import urwid.curses_display
 
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from dbus.mainloop.glib import DBusGMainLoop
 
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from gi.repository import GLib
 
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if sys.version_info.major == 2:
 
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locale.setlocale(locale.LC_ALL, '')
 
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logging.getLogger('dbus.proxies').setLevel(logging.CRITICAL)
 
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# Some useful constants
 
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domain = 'se.recompile'
 
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server_interface = domain + '.Mandos'
 
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client_interface = domain + '.Mandos.Client'
 
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    dbus.OBJECT_MANAGER_IFACE
 
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except AttributeError:
 
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    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
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def isoformat_to_datetime(iso):
 
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    "Parse an ISO 8601 date string to a datetime.datetime()"
 
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    d, t = iso.split("T", 1)
 
72
 
    year, month, day = d.split("-", 2)
 
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    hour, minute, second = t.split(":", 2)
 
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    second, fraction = divmod(float(second), 1)
 
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    return datetime.datetime(int(year),
 
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                             int(second),           # Whole seconds
 
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                             int(fraction*1000000)) # Microseconds
 
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class MandosClientPropertyCache(object):
 
84
 
    """This wraps a Mandos Client D-Bus proxy object, caches the
 
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    properties and calls a hook function when any of them are
 
88
 
    def __init__(self, proxy_object=None, properties=None, **kwargs):
 
89
 
        self.proxy = proxy_object # Mandos Client proxy object
 
90
 
        self.properties = dict() if properties is None else properties
 
91
 
        self.property_changed_match = (
 
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            self.proxy.connect_to_signal("PropertiesChanged",
 
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                                         self.properties_changed,
 
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                                         dbus.PROPERTIES_IFACE,
 
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        if properties is None:
 
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            self.properties.update(
 
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                self.proxy.GetAll(client_interface,
 
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                                  = dbus.PROPERTIES_IFACE))
 
103
 
        super(MandosClientPropertyCache, self).__init__(**kwargs)
 
105
 
    def properties_changed(self, interface, properties, invalidated):
 
106
 
        """This is called whenever we get a PropertiesChanged signal
 
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        It updates the changed properties in the "properties" dict.
 
109
 
        # Update properties dict with new value
 
110
 
        if interface == client_interface:
 
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            self.properties.update(properties)
 
114
 
        self.property_changed_match.remove()
 
117
 
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
 
118
 
    """A Mandos Client which is visible on the screen.
 
121
 
    def __init__(self, server_proxy_object=None, update_hook=None,
 
122
 
                 delete_hook=None, logger=None, **kwargs):
 
124
 
        self.update_hook = update_hook
 
126
 
        self.delete_hook = delete_hook
 
127
 
        # Mandos Server proxy object
 
128
 
        self.server_proxy_object = server_proxy_object
 
132
 
        self._update_timer_callback_tag = None
 
134
 
        # The widget shown normally
 
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        self._text_widget = urwid.Text("")
 
136
 
        # The widget shown when we have focus
 
137
 
        self._focus_text_widget = urwid.Text("")
 
138
 
        super(MandosClientWidget, self).__init__(**kwargs)
 
142
 
        self.match_objects = (
 
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            self.proxy.connect_to_signal("CheckerCompleted",
 
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                                         self.checker_completed,
 
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            self.proxy.connect_to_signal("CheckerStarted",
 
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                                         self.checker_started,
 
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            self.proxy.connect_to_signal("GotSecret",
 
155
 
            self.proxy.connect_to_signal("NeedApproval",
 
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            self.proxy.connect_to_signal("Rejected",
 
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        self.logger('Created client {}'
 
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                    .format(self.properties["Name"]), level=0)
 
166
 
    def using_timer(self, flag):
 
167
 
        """Call this method with True or False when timer should be
 
168
 
        activated or deactivated.
 
170
 
        if flag and self._update_timer_callback_tag is None:
 
171
 
            # Will update the shown timer value every second
 
172
 
            self._update_timer_callback_tag = (GLib.timeout_add
 
175
 
        elif not (flag or self._update_timer_callback_tag is None):
 
176
 
            GLib.source_remove(self._update_timer_callback_tag)
 
177
 
            self._update_timer_callback_tag = None
 
179
 
    def checker_completed(self, exitstatus, condition, command):
 
181
 
            self.logger('Checker for client {} (command "{}")'
 
182
 
                        ' succeeded'.format(self.properties["Name"],
 
187
 
        if os.WIFEXITED(condition):
 
188
 
            self.logger('Checker for client {} (command "{}") failed'
 
190
 
                        .format(self.properties["Name"], command,
 
191
 
                                os.WEXITSTATUS(condition)))
 
192
 
        elif os.WIFSIGNALED(condition):
 
193
 
            self.logger('Checker for client {} (command "{}") was'
 
194
 
                        ' killed by signal {}'
 
195
 
                        .format(self.properties["Name"], command,
 
196
 
                                os.WTERMSIG(condition)))
 
199
 
    def checker_started(self, command):
 
200
 
        """Server signals that a checker started."""
 
201
 
        self.logger('Client {} started checker "{}"'
 
202
 
                    .format(self.properties["Name"],
 
205
 
    def got_secret(self):
 
206
 
        self.logger('Client {} received its secret'
 
207
 
                    .format(self.properties["Name"]))
 
209
 
    def need_approval(self, timeout, default):
 
211
 
            message = 'Client {} needs approval within {} seconds'
 
213
 
            message = 'Client {} will get its secret in {} seconds'
 
214
 
        self.logger(message.format(self.properties["Name"],
 
217
 
    def rejected(self, reason):
 
218
 
        self.logger('Client {} was rejected; reason: {}'
 
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                    .format(self.properties["Name"], reason))
 
221
 
    def selectable(self):
 
222
 
        """Make this a "selectable" widget.
 
223
 
        This overrides the method from urwid.FlowWidget."""
 
226
 
    def rows(self, maxcolrow, focus=False):
 
227
 
        """How many rows this widget will occupy might depend on
 
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        whether we have focus or not.
 
229
 
        This overrides the method from urwid.FlowWidget"""
 
230
 
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
 
232
 
    def current_widget(self, focus=False):
 
233
 
        if focus or self.opened:
 
234
 
            return self._focus_widget
 
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",
 
243
 
                              "underline-blink-standout",
 
244
 
                          "bold-underline-blink":
 
245
 
                              "bold-underline-blink-standout",
 
248
 
        # Rebuild focus and non-focus widgets using current properties
 
250
 
        # Base part of a client. Name!
 
251
 
        base = '{name}: '.format(name=self.properties["Name"])
 
252
 
        if not self.properties["Enabled"]:
 
254
 
            self.using_timer(False)
 
255
 
        elif self.properties["ApprovalPending"]:
 
256
 
            timeout = datetime.timedelta(milliseconds
 
259
 
            last_approval_request = isoformat_to_datetime(
 
260
 
                self.properties["LastApprovalRequest"])
 
261
 
            if last_approval_request is not None:
 
262
 
                timer = max(timeout - (datetime.datetime.utcnow()
 
263
 
                                       - last_approval_request),
 
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                            datetime.timedelta())
 
266
 
                timer = datetime.timedelta()
 
267
 
            if self.properties["ApprovedByDefault"]:
 
268
 
                message = "Approval in {}. (d)eny?"
 
270
 
                message = "Denial in {}. (a)pprove?"
 
271
 
            message = message.format(str(timer).rsplit(".", 1)[0])
 
272
 
            self.using_timer(True)
 
273
 
        elif self.properties["LastCheckerStatus"] != 0:
 
274
 
            # When checker has failed, show timer until client expires
 
275
 
            expires = self.properties["Expires"]
 
277
 
                timer = datetime.timedelta(0)
 
279
 
                expires = (datetime.datetime.strptime
 
280
 
                           (expires, '%Y-%m-%dT%H:%M:%S.%f'))
 
281
 
                timer = max(expires - datetime.datetime.utcnow(),
 
282
 
                            datetime.timedelta())
 
283
 
            message = ('A checker has failed! Time until client'
 
285
 
                       .format(str(timer).rsplit(".", 1)[0]))
 
286
 
            self.using_timer(True)
 
289
 
            self.using_timer(False)
 
290
 
        self._text = "{}{}".format(base, message)
 
292
 
        if not urwid.supports_unicode():
 
293
 
            self._text = self._text.encode("ascii", "replace")
 
294
 
        textlist = [("normal", self._text)]
 
295
 
        self._text_widget.set_text(textlist)
 
296
 
        self._focus_text_widget.set_text([(with_standout[text[0]],
 
298
 
                                          if isinstance(text, tuple)
 
300
 
                                          for text in textlist])
 
301
 
        self._widget = self._text_widget
 
302
 
        self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
 
304
 
        # Run update hook, if any
 
305
 
        if self.update_hook is not None:
 
308
 
    def update_timer(self):
 
309
 
        """called by GLib. Will indefinitely loop until
 
310
 
        GLib.source_remove() on tag is called
 
313
 
        return True             # Keep calling this
 
315
 
    def delete(self, **kwargs):
 
316
 
        if self._update_timer_callback_tag is not None:
 
317
 
            GLib.source_remove(self._update_timer_callback_tag)
 
318
 
            self._update_timer_callback_tag = None
 
319
 
        for match in self.match_objects:
 
321
 
        self.match_objects = ()
 
322
 
        if self.delete_hook is not None:
 
323
 
            self.delete_hook(self)
 
324
 
        return super(MandosClientWidget, self).delete(**kwargs)
 
326
 
    def render(self, maxcolrow, focus=False):
 
327
 
        """Render differently if we have focus.
 
328
 
        This overrides the method from urwid.FlowWidget"""
 
329
 
        return self.current_widget(focus).render(maxcolrow,
 
332
 
    def keypress(self, maxcolrow, key):
 
334
 
        This overrides the method from urwid.FlowWidget"""
 
336
 
            self.proxy.Set(client_interface, "Enabled",
 
337
 
                           dbus.Boolean(True), ignore_reply = True,
 
338
 
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
340
 
            self.proxy.Set(client_interface, "Enabled", False,
 
342
 
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
344
 
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
 
345
 
                               dbus_interface = client_interface,
 
348
 
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
 
349
 
                                  dbus_interface = client_interface,
 
351
 
        elif key == "R" or key == "_" or key == "ctrl k":
 
352
 
            self.server_proxy_object.RemoveClient(self.proxy
 
356
 
            self.proxy.Set(client_interface, "CheckerRunning",
 
357
 
                           dbus.Boolean(True), ignore_reply = True,
 
358
 
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
360
 
            self.proxy.Set(client_interface, "CheckerRunning",
 
361
 
                           dbus.Boolean(False), ignore_reply = True,
 
362
 
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
364
 
            self.proxy.CheckedOK(dbus_interface = client_interface,
 
367
 
#         elif key == "p" or key == "=":
 
369
 
#         elif key == "u" or key == ":":
 
370
 
#             self.proxy.unpause()
 
376
 
    def properties_changed(self, interface, properties, invalidated):
 
377
 
        """Call self.update() if any properties changed.
 
378
 
        This overrides the method from MandosClientPropertyCache"""
 
379
 
        old_values = { key: self.properties.get(key)
 
380
 
                       for key in properties.keys() }
 
381
 
        super(MandosClientWidget, self).properties_changed(
 
382
 
            interface, properties, invalidated)
 
383
 
        if any(old_values[key] != self.properties.get(key)
 
384
 
               for key in old_values):
 
388
 
class ConstrainedListBox(urwid.ListBox):
 
389
 
    """Like a normal urwid.ListBox, but will consume all "up" or
 
390
 
    "down" key presses, thus not allowing any containing widgets to
 
391
 
    use them as an excuse to shift focus away from this widget.
 
393
 
    def keypress(self, *args, **kwargs):
 
394
 
        ret = super(ConstrainedListBox, self).keypress(*args, **kwargs)
 
395
 
        if ret in ("up", "down"):
 
400
 
class UserInterface(object):
 
401
 
    """This is the entire user interface - the whole screen
 
402
 
    with boxes, lists of client widgets, etc.
 
404
 
    def __init__(self, max_log_length=1000, log_level=1):
 
405
 
        DBusGMainLoop(set_as_default=True)
 
407
 
        self.screen = urwid.curses_display.Screen()
 
409
 
        self.screen.register_palette((
 
411
 
                 "default", "default", None),
 
413
 
                 "bold", "default", "bold"),
 
415
 
                 "underline,blink", "default", "underline,blink"),
 
417
 
                 "standout", "default", "standout"),
 
418
 
                ("bold-underline-blink",
 
419
 
                 "bold,underline,blink", "default", "bold,underline,blink"),
 
421
 
                 "bold,standout", "default", "bold,standout"),
 
422
 
                ("underline-blink-standout",
 
423
 
                 "underline,blink,standout", "default",
 
424
 
                 "underline,blink,standout"),
 
425
 
                ("bold-underline-blink-standout",
 
426
 
                 "bold,underline,blink,standout", "default",
 
427
 
                 "bold,underline,blink,standout"),
 
430
 
        if urwid.supports_unicode():
 
431
 
            self.divider = "─" # \u2500
 
432
 
            #self.divider = "━" # \u2501
 
434
 
            #self.divider = "-" # \u002d
 
435
 
            self.divider = "_" # \u005f
 
439
 
        self.size = self.screen.get_cols_rows()
 
441
 
        self.clients = urwid.SimpleListWalker([])
 
442
 
        self.clients_dict = {}
 
444
 
        # We will add Text widgets to this list
 
446
 
        self.max_log_length = max_log_length
 
448
 
        self.log_level = log_level
 
450
 
        # We keep a reference to the log widget so we can remove it
 
451
 
        # from the ListWalker without it getting destroyed
 
452
 
        self.logbox = ConstrainedListBox(self.log)
 
454
 
        # This keeps track of whether self.uilist currently has
 
455
 
        # self.logbox in it or not
 
456
 
        self.log_visible = True
 
457
 
        self.log_wrap = "any"
 
460
 
        self.log_message_raw(("bold",
 
461
 
                              "Mandos Monitor version " + version))
 
462
 
        self.log_message_raw(("bold",
 
465
 
        self.busname = domain + '.Mandos'
 
466
 
        self.main_loop = GLib.MainLoop()
 
468
 
    def client_not_found(self, fingerprint, address):
 
469
 
        self.log_message("Client with address {} and fingerprint {}"
 
470
 
                         " could not be found"
 
471
 
                         .format(address, fingerprint))
 
474
 
        """This rebuilds the User Interface.
 
475
 
        Call this when the widget layout needs to change"""
 
477
 
        #self.uilist.append(urwid.ListBox(self.clients))
 
478
 
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
 
480
 
                                       #header=urwid.Divider(),
 
483
 
                                       urwid.Divider(div_char=
 
486
 
            self.uilist.append(self.logbox)
 
487
 
        self.topwidget = urwid.Pile(self.uilist)
 
489
 
    def log_message(self, message, level=1):
 
490
 
        """Log message formatted with timestamp"""
 
491
 
        if level < self.log_level:
 
493
 
        timestamp = datetime.datetime.now().isoformat()
 
494
 
        self.log_message_raw("{}: {}".format(timestamp, message),
 
497
 
    def log_message_raw(self, markup, level=1):
 
498
 
        """Add a log message to the log buffer."""
 
499
 
        if level < self.log_level:
 
501
 
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
 
502
 
        if (self.max_log_length
 
503
 
            and len(self.log) > self.max_log_length):
 
504
 
            del self.log[0:len(self.log)-self.max_log_length-1]
 
505
 
        self.logbox.set_focus(len(self.logbox.body.contents),
 
509
 
    def toggle_log_display(self):
 
510
 
        """Toggle visibility of the log buffer."""
 
511
 
        self.log_visible = not self.log_visible
 
513
 
        self.log_message("Log visibility changed to: {}"
 
514
 
                         .format(self.log_visible), level=0)
 
516
 
    def change_log_display(self):
 
517
 
        """Change type of log display.
 
518
 
        Currently, this toggles wrapping of text lines."""
 
519
 
        if self.log_wrap == "clip":
 
520
 
            self.log_wrap = "any"
 
522
 
            self.log_wrap = "clip"
 
523
 
        for textwidget in self.log:
 
524
 
            textwidget.set_wrap_mode(self.log_wrap)
 
525
 
        self.log_message("Wrap mode: {}".format(self.log_wrap),
 
528
 
    def find_and_remove_client(self, path, interfaces):
 
529
 
        """Find a client by its object path and remove it.
 
531
 
        This is connected to the InterfacesRemoved signal from the
 
532
 
        Mandos server object."""
 
533
 
        if client_interface not in interfaces:
 
534
 
            # Not a Mandos client object; ignore
 
537
 
            client = self.clients_dict[path]
 
540
 
            self.log_message("Unknown client {!r} removed"
 
545
 
    def add_new_client(self, path, ifs_and_props):
 
546
 
        """Find a client by its object path and remove it.
 
548
 
        This is connected to the InterfacesAdded signal from the
 
549
 
        Mandos server object.
 
551
 
        if client_interface not in ifs_and_props:
 
552
 
            # Not a Mandos client object; ignore
 
554
 
        client_proxy_object = self.bus.get_object(self.busname, path)
 
555
 
        self.add_client(MandosClientWidget(server_proxy_object
 
558
 
                                           =client_proxy_object,
 
566
 
                                           = dict(ifs_and_props[
 
570
 
    def add_client(self, client, path=None):
 
571
 
        self.clients.append(client)
 
573
 
            path = client.proxy.object_path
 
574
 
        self.clients_dict[path] = client
 
575
 
        self.clients.sort(key=lambda c: c.properties["Name"])
 
578
 
    def remove_client(self, client, path=None):
 
579
 
        self.clients.remove(client)
 
581
 
            path = client.proxy.object_path
 
582
 
        del self.clients_dict[path]
 
586
 
        """Redraw the screen"""
 
587
 
        canvas = self.topwidget.render(self.size, focus=True)
 
588
 
        self.screen.draw_screen(self.size, canvas)
 
591
 
        """Start the main loop and exit when it's done."""
 
592
 
        self.bus = dbus.SystemBus()
 
593
 
        mandos_dbus_objc = self.bus.get_object(
 
594
 
            self.busname, "/", follow_name_owner_changes=True)
 
595
 
        self.mandos_serv = dbus.Interface(mandos_dbus_objc,
 
599
 
            mandos_clients = (self.mandos_serv
 
600
 
                              .GetAllClientsWithProperties())
 
601
 
            if not mandos_clients:
 
602
 
                self.log_message_raw(("bold", "Note: Server has no clients."))
 
603
 
        except dbus.exceptions.DBusException:
 
604
 
            self.log_message_raw(("bold", "Note: No Mandos server running."))
 
605
 
            mandos_clients = dbus.Dictionary()
 
608
 
         .connect_to_signal("InterfacesRemoved",
 
609
 
                            self.find_and_remove_client,
 
611
 
                            = dbus.OBJECT_MANAGER_IFACE,
 
614
 
         .connect_to_signal("InterfacesAdded",
 
617
 
                            = dbus.OBJECT_MANAGER_IFACE,
 
620
 
         .connect_to_signal("ClientNotFound",
 
621
 
                            self.client_not_found,
 
622
 
                            dbus_interface=server_interface,
 
624
 
        for path, client in mandos_clients.items():
 
625
 
            client_proxy_object = self.bus.get_object(self.busname,
 
627
 
            self.add_client(MandosClientWidget(server_proxy_object
 
630
 
                                               =client_proxy_object,
 
641
 
        self._input_callback_tag = (GLib.io_add_watch
 
646
 
        # Main loop has finished, we should close everything now
 
647
 
        GLib.source_remove(self._input_callback_tag)
 
651
 
        self.main_loop.quit()
 
653
 
    def process_input(self, source, condition):
 
654
 
        keys = self.screen.get_input()
 
655
 
        translations = { "ctrl n": "down",      # Emacs
 
656
 
                         "ctrl p": "up",        # Emacs
 
657
 
                         "ctrl v": "page down", # Emacs
 
658
 
                         "meta v": "page up",   # Emacs
 
659
 
                         " ": "page down",      # less
 
660
 
                         "f": "page down",      # less
 
661
 
                         "b": "page up",        # less
 
667
 
                key = translations[key]
 
668
 
            except KeyError:    # :-)
 
671
 
            if key == "q" or key == "Q":
 
674
 
            elif key == "window resize":
 
675
 
                self.size = self.screen.get_cols_rows()
 
677
 
            elif key == "ctrl l":
 
680
 
            elif key == "l" or key == "D":
 
681
 
                self.toggle_log_display()
 
683
 
            elif key == "w" or key == "i":
 
684
 
                self.change_log_display()
 
686
 
            elif key == "?" or key == "f1" or key == "esc":
 
687
 
                if not self.log_visible:
 
688
 
                    self.log_visible = True
 
690
 
                self.log_message_raw(("bold",
 
694
 
                                            "l: Log window toggle",
 
695
 
                                            "TAB: Switch window",
 
696
 
                                            "w: Wrap (log lines)",
 
697
 
                                            "v: Toggle verbose log",
 
699
 
                self.log_message_raw(("bold",
 
705
 
                                             "s: Start new checker",
 
712
 
                if self.topwidget.get_focus() is self.logbox:
 
713
 
                    self.topwidget.set_focus(0)
 
715
 
                    self.topwidget.set_focus(self.logbox)
 
718
 
                if self.log_level == 0:
 
720
 
                    self.log_message("Verbose mode: Off")
 
723
 
                    self.log_message("Verbose mode: On")
 
724
 
            #elif (key == "end" or key == "meta >" or key == "G"
 
726
 
            #    pass            # xxx end-of-buffer
 
727
 
            #elif (key == "home" or key == "meta <" or key == "g"
 
729
 
            #    pass            # xxx beginning-of-buffer
 
730
 
            #elif key == "ctrl e" or key == "$":
 
731
 
            #    pass            # xxx move-end-of-line
 
732
 
            #elif key == "ctrl a" or key == "^":
 
733
 
            #    pass            # xxx move-beginning-of-line
 
734
 
            #elif key == "ctrl b" or key == "meta (" or key == "h":
 
736
 
            #elif key == "ctrl f" or key == "meta )" or key == "l":
 
739
 
            #    pass            # scroll up log
 
741
 
            #    pass            # scroll down log
 
742
 
            elif self.topwidget.selectable():
 
743
 
                self.topwidget.keypress(self.size, key)
 
750
 
except KeyboardInterrupt:
 
752
 
except Exception as e:
 
753
 
    ui.log_message(str(e))