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  • Committer: Teddy Hogeborn
  • Date: 2009-04-01 03:37:45 UTC
  • Revision ID: teddy@fukt.bsnet.se-20090401033745-c89k6bij5opdm1rk
* mandos (ClientDBus.__del__): Bug fix: Correct mispasted code, and do
                               not try to call
                               dbus.service.Object.__del__() if it
                               does not exist.
  (ClientDBus.start_checker): Simplify logic.

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Lines of Context:
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# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
 
9
# methods "add" and "remove" in the "AvahiService" class, the
 
10
# "server_state_changed" and "entry_group_state_changed" functions,
 
11
# and some lines in "main".
12
12
13
13
# Everything else is
14
14
# Copyright © 2008,2009 Teddy Hogeborn
33
33
 
34
34
from __future__ import division, with_statement, absolute_import
35
35
 
36
 
import SocketServer as socketserver
 
36
import SocketServer
37
37
import socket
38
38
import optparse
39
39
import datetime
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
 
import ConfigParser as configparser
 
47
import ConfigParser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
 
52
from sets import Set
52
53
import subprocess
53
54
import atexit
54
55
import stat
55
56
import logging
56
57
import logging.handlers
57
58
import pwd
58
 
import contextlib
59
 
import struct
60
 
import fcntl
61
 
import functools
62
 
import cPickle as pickle
63
 
import multiprocessing
 
59
from contextlib import closing
64
60
 
65
61
import dbus
66
62
import dbus.service
69
65
from dbus.mainloop.glib import DBusGMainLoop
70
66
import ctypes
71
67
import ctypes.util
72
 
import xml.dom.minidom
73
 
import inspect
74
 
 
75
 
try:
76
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
 
except AttributeError:
78
 
    try:
79
 
        from IN import SO_BINDTODEVICE
80
 
    except ImportError:
81
 
        SO_BINDTODEVICE = None
82
 
 
83
 
 
84
 
version = "1.0.14"
85
 
 
86
 
#logger = logging.getLogger(u'mandos')
87
 
logger = logging.Logger(u'mandos')
 
68
 
 
69
version = "1.0.8"
 
70
 
 
71
logger = logging.Logger('mandos')
88
72
syslogger = (logging.handlers.SysLogHandler
89
73
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
90
74
              address = "/dev/log"))
91
75
syslogger.setFormatter(logging.Formatter
92
 
                       (u'Mandos [%(process)d]: %(levelname)s:'
93
 
                        u' %(message)s'))
 
76
                       ('Mandos [%(process)d]: %(levelname)s:'
 
77
                        ' %(message)s'))
94
78
logger.addHandler(syslogger)
95
79
 
96
80
console = logging.StreamHandler()
97
 
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
 
                                       u' %(levelname)s:'
99
 
                                       u' %(message)s'))
 
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
 
82
                                       ' %(levelname)s: %(message)s'))
100
83
logger.addHandler(console)
101
84
 
102
85
class AvahiError(Exception):
115
98
 
116
99
class AvahiService(object):
117
100
    """An Avahi (Zeroconf) service.
118
 
    
119
101
    Attributes:
120
102
    interface: integer; avahi.IF_UNSPEC or an interface index.
121
103
               Used to optionally bind to the specified interface.
122
 
    name: string; Example: u'Mandos'
123
 
    type: string; Example: u'_mandos._tcp'.
 
104
    name: string; Example: 'Mandos'
 
105
    type: string; Example: '_mandos._tcp'.
124
106
                  See <http://www.dns-sd.org/ServiceTypes.html>
125
107
    port: integer; what port to announce
126
108
    TXT: list of strings; TXT record for the service
129
111
    max_renames: integer; maximum number of renames
130
112
    rename_count: integer; counter so we only rename after collisions
131
113
                  a sensible number of times
132
 
    group: D-Bus Entry Group
133
 
    server: D-Bus Server
134
 
    bus: dbus.SystemBus()
135
114
    """
136
115
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
137
116
                 servicetype = None, port = None, TXT = None,
138
 
                 domain = u"", host = u"", max_renames = 32768,
139
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
117
                 domain = "", host = "", max_renames = 32768,
 
118
                 protocol = avahi.PROTO_UNSPEC):
140
119
        self.interface = interface
141
120
        self.name = name
142
121
        self.type = servicetype
147
126
        self.rename_count = 0
148
127
        self.max_renames = max_renames
149
128
        self.protocol = protocol
150
 
        self.group = None       # our entry group
151
 
        self.server = None
152
 
        self.bus = bus
153
129
    def rename(self):
154
130
        """Derived from the Avahi example code"""
155
131
        if self.rename_count >= self.max_renames:
157
133
                            u" after %i retries, exiting.",
158
134
                            self.rename_count)
159
135
            raise AvahiServiceError(u"Too many renames")
160
 
        self.name = unicode(self.server.GetAlternativeServiceName(self.name))
 
136
        self.name = server.GetAlternativeServiceName(self.name)
161
137
        logger.info(u"Changing Zeroconf service name to %r ...",
162
 
                    self.name)
 
138
                    str(self.name))
163
139
        syslogger.setFormatter(logging.Formatter
164
 
                               (u'Mandos (%s) [%%(process)d]:'
165
 
                                u' %%(levelname)s: %%(message)s'
 
140
                               ('Mandos (%s) [%%(process)d]:'
 
141
                                ' %%(levelname)s: %%(message)s'
166
142
                                % self.name))
167
143
        self.remove()
168
 
        try:
169
 
            self.add()
170
 
        except dbus.exceptions.DBusException, error:
171
 
            logger.critical(u"DBusException: %s", error)
172
 
            self.cleanup()
173
 
            os._exit(1)
 
144
        self.add()
174
145
        self.rename_count += 1
175
146
    def remove(self):
176
147
        """Derived from the Avahi example code"""
177
 
        if self.group is not None:
178
 
            self.group.Reset()
 
148
        if group is not None:
 
149
            group.Reset()
179
150
    def add(self):
180
151
        """Derived from the Avahi example code"""
181
 
        if self.group is None:
182
 
            self.group = dbus.Interface(
183
 
                self.bus.get_object(avahi.DBUS_NAME,
184
 
                                    self.server.EntryGroupNew()),
185
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
186
 
            self.group.connect_to_signal('StateChanged',
187
 
                                         self
188
 
                                         .entry_group_state_changed)
 
152
        global group
 
153
        if group is None:
 
154
            group = dbus.Interface(bus.get_object
 
155
                                   (avahi.DBUS_NAME,
 
156
                                    server.EntryGroupNew()),
 
157
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
158
            group.connect_to_signal('StateChanged',
 
159
                                    entry_group_state_changed)
189
160
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
190
 
                     self.name, self.type)
191
 
        self.group.AddService(
192
 
            self.interface,
193
 
            self.protocol,
194
 
            dbus.UInt32(0),     # flags
195
 
            self.name, self.type,
196
 
            self.domain, self.host,
197
 
            dbus.UInt16(self.port),
198
 
            avahi.string_array_to_txt_array(self.TXT))
199
 
        self.group.Commit()
200
 
    def entry_group_state_changed(self, state, error):
201
 
        """Derived from the Avahi example code"""
202
 
        logger.debug(u"Avahi entry group state change: %i", state)
203
 
        
204
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
205
 
            logger.debug(u"Zeroconf service established.")
206
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
207
 
            logger.warning(u"Zeroconf service name collision.")
208
 
            self.rename()
209
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
210
 
            logger.critical(u"Avahi: Error in group state changed %s",
211
 
                            unicode(error))
212
 
            raise AvahiGroupError(u"State changed: %s"
213
 
                                  % unicode(error))
214
 
    def cleanup(self):
215
 
        """Derived from the Avahi example code"""
216
 
        if self.group is not None:
217
 
            self.group.Free()
218
 
            self.group = None
219
 
    def server_state_changed(self, state):
220
 
        """Derived from the Avahi example code"""
221
 
        logger.debug(u"Avahi server state change: %i", state)
222
 
        if state == avahi.SERVER_COLLISION:
223
 
            logger.error(u"Zeroconf server name collision")
224
 
            self.remove()
225
 
        elif state == avahi.SERVER_RUNNING:
226
 
            self.add()
227
 
    def activate(self):
228
 
        """Derived from the Avahi example code"""
229
 
        if self.server is None:
230
 
            self.server = dbus.Interface(
231
 
                self.bus.get_object(avahi.DBUS_NAME,
232
 
                                    avahi.DBUS_PATH_SERVER),
233
 
                avahi.DBUS_INTERFACE_SERVER)
234
 
        self.server.connect_to_signal(u"StateChanged",
235
 
                                 self.server_state_changed)
236
 
        self.server_state_changed(self.server.GetState())
 
161
                     service.name, service.type)
 
162
        group.AddService(
 
163
                self.interface,         # interface
 
164
                self.protocol,          # protocol
 
165
                dbus.UInt32(0),         # flags
 
166
                self.name, self.type,
 
167
                self.domain, self.host,
 
168
                dbus.UInt16(self.port),
 
169
                avahi.string_array_to_txt_array(self.TXT))
 
170
        group.Commit()
 
171
 
 
172
# From the Avahi example code:
 
173
group = None                            # our entry group
 
174
# End of Avahi example code
 
175
 
 
176
 
 
177
def _datetime_to_dbus(dt, variant_level=0):
 
178
    """Convert a UTC datetime.datetime() to a D-Bus type."""
 
179
    return dbus.String(dt.isoformat(), variant_level=variant_level)
237
180
 
238
181
 
239
182
class Client(object):
240
183
    """A representation of a client host served by this server.
241
 
    
242
184
    Attributes:
243
 
    _approved:   bool(); 'None' if not yet approved/disapproved
244
 
    approval_delay: datetime.timedelta(); Time to wait for approval
245
 
    approval_duration: datetime.timedelta(); Duration of one approval
 
185
    name:       string; from the config file, used in log messages and
 
186
                        D-Bus identifiers
 
187
    fingerprint: string (40 or 32 hexadecimal digits); used to
 
188
                 uniquely identify the client
 
189
    secret:     bytestring; sent verbatim (over TLS) to client
 
190
    host:       string; available for use by the checker command
 
191
    created:    datetime.datetime(); (UTC) object creation
 
192
    last_enabled: datetime.datetime(); (UTC)
 
193
    enabled:    bool()
 
194
    last_checked_ok: datetime.datetime(); (UTC) or None
 
195
    timeout:    datetime.timedelta(); How long from last_checked_ok
 
196
                                      until this client is invalid
 
197
    interval:   datetime.timedelta(); How often to start a new checker
 
198
    disable_hook:  If set, called by disable() as disable_hook(self)
246
199
    checker:    subprocess.Popen(); a running checker process used
247
200
                                    to see if the client lives.
248
201
                                    'None' if no process is running.
 
202
    checker_initiator_tag: a gobject event source tag, or None
 
203
    disable_initiator_tag:    - '' -
249
204
    checker_callback_tag:  - '' -
250
 
    checker_command: string; External command which is run to check
251
 
                     if client lives.  %() expansions are done at
 
205
    checker_command: string; External command which is run to check if
 
206
                     client lives.  %() expansions are done at
252
207
                     runtime with vars(self) as dict, so that for
253
208
                     instance %(name)s can be used in the command.
254
 
    checker_initiator_tag: a gobject event source tag, or None
255
 
    created:    datetime.datetime(); (UTC) object creation
256
209
    current_checker_command: string; current running checker_command
257
 
    disable_hook:  If set, called by disable() as disable_hook(self)
258
 
    disable_initiator_tag: - '' -
259
 
    enabled:    bool()
260
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
261
 
                 uniquely identify the client
262
 
    host:       string; available for use by the checker command
263
 
    interval:   datetime.timedelta(); How often to start a new checker
264
 
    last_checked_ok: datetime.datetime(); (UTC) or None
265
 
    last_enabled: datetime.datetime(); (UTC)
266
 
    name:       string; from the config file, used in log messages and
267
 
                        D-Bus identifiers
268
 
    secret:     bytestring; sent verbatim (over TLS) to client
269
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
270
 
                                      until this client is disabled
271
 
    runtime_expansions: Allowed attributes for runtime expansion.
272
210
    """
273
 
    
274
 
    runtime_expansions = (u"approval_delay", u"approval_duration",
275
 
                          u"created", u"enabled", u"fingerprint",
276
 
                          u"host", u"interval", u"last_checked_ok",
277
 
                          u"last_enabled", u"name", u"timeout")
278
 
    
279
 
    @staticmethod
280
 
    def _timedelta_to_milliseconds(td):
281
 
        "Convert a datetime.timedelta() to milliseconds"
282
 
        return ((td.days * 24 * 60 * 60 * 1000)
283
 
                + (td.seconds * 1000)
284
 
                + (td.microseconds // 1000))
285
 
    
286
211
    def timeout_milliseconds(self):
287
212
        "Return the 'timeout' attribute in milliseconds"
288
 
        return self._timedelta_to_milliseconds(self.timeout)
 
213
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
 
214
                + (self.timeout.seconds * 1000)
 
215
                + (self.timeout.microseconds // 1000))
289
216
    
290
217
    def interval_milliseconds(self):
291
218
        "Return the 'interval' attribute in milliseconds"
292
 
        return self._timedelta_to_milliseconds(self.interval)
293
 
 
294
 
    def approval_delay_milliseconds(self):
295
 
        return self._timedelta_to_milliseconds(self.approval_delay)
 
219
        return ((self.interval.days * 24 * 60 * 60 * 1000)
 
220
                + (self.interval.seconds * 1000)
 
221
                + (self.interval.microseconds // 1000))
296
222
    
297
223
    def __init__(self, name = None, disable_hook=None, config=None):
298
224
        """Note: the 'checker' key in 'config' sets the
305
231
        # Uppercase and remove spaces from fingerprint for later
306
232
        # comparison purposes with return value from the fingerprint()
307
233
        # function
308
 
        self.fingerprint = (config[u"fingerprint"].upper()
 
234
        self.fingerprint = (config["fingerprint"].upper()
309
235
                            .replace(u" ", u""))
310
236
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
311
 
        if u"secret" in config:
312
 
            self.secret = config[u"secret"].decode(u"base64")
313
 
        elif u"secfile" in config:
314
 
            with open(os.path.expanduser(os.path.expandvars
315
 
                                         (config[u"secfile"])),
316
 
                      "rb") as secfile:
 
237
        if "secret" in config:
 
238
            self.secret = config["secret"].decode(u"base64")
 
239
        elif "secfile" in config:
 
240
            with closing(open(os.path.expanduser
 
241
                              (os.path.expandvars
 
242
                               (config["secfile"])))) as secfile:
317
243
                self.secret = secfile.read()
318
244
        else:
319
245
            raise TypeError(u"No secret or secfile for client %s"
320
246
                            % self.name)
321
 
        self.host = config.get(u"host", u"")
 
247
        self.host = config.get("host", "")
322
248
        self.created = datetime.datetime.utcnow()
323
249
        self.enabled = False
324
250
        self.last_enabled = None
325
251
        self.last_checked_ok = None
326
 
        self.timeout = string_to_delta(config[u"timeout"])
327
 
        self.interval = string_to_delta(config[u"interval"])
 
252
        self.timeout = string_to_delta(config["timeout"])
 
253
        self.interval = string_to_delta(config["interval"])
328
254
        self.disable_hook = disable_hook
329
255
        self.checker = None
330
256
        self.checker_initiator_tag = None
331
257
        self.disable_initiator_tag = None
332
258
        self.checker_callback_tag = None
333
 
        self.checker_command = config[u"checker"]
 
259
        self.checker_command = config["checker"]
334
260
        self.current_checker_command = None
335
261
        self.last_connect = None
336
 
        self._approved = None
337
 
        self.approved_by_default = config.get(u"approved_by_default",
338
 
                                              True)
339
 
        self.approvals_pending = 0
340
 
        self.approval_delay = string_to_delta(
341
 
            config[u"approval_delay"])
342
 
        self.approval_duration = string_to_delta(
343
 
            config[u"approval_duration"])
344
 
        self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
345
262
    
346
 
    def send_changedstate(self):
347
 
        self.changedstate.acquire()
348
 
        self.changedstate.notify_all()
349
 
        self.changedstate.release()
350
 
        
351
263
    def enable(self):
352
264
        """Start this client's checker and timeout hooks"""
353
 
        if getattr(self, u"enabled", False):
354
 
            # Already enabled
355
 
            return
356
 
        self.send_changedstate()
357
265
        self.last_enabled = datetime.datetime.utcnow()
358
266
        # Schedule a new checker to be started an 'interval' from now,
359
267
        # and every interval from then on.
360
268
        self.checker_initiator_tag = (gobject.timeout_add
361
269
                                      (self.interval_milliseconds(),
362
270
                                       self.start_checker))
 
271
        # Also start a new checker *right now*.
 
272
        self.start_checker()
363
273
        # Schedule a disable() when 'timeout' has passed
364
274
        self.disable_initiator_tag = (gobject.timeout_add
365
275
                                   (self.timeout_milliseconds(),
366
276
                                    self.disable))
367
277
        self.enabled = True
368
 
        # Also start a new checker *right now*.
369
 
        self.start_checker()
370
278
    
371
 
    def disable(self, quiet=True):
 
279
    def disable(self):
372
280
        """Disable this client."""
373
281
        if not getattr(self, "enabled", False):
374
282
            return False
375
 
        if not quiet:
376
 
            self.send_changedstate()
377
 
        if not quiet:
378
 
            logger.info(u"Disabling client %s", self.name)
379
 
        if getattr(self, u"disable_initiator_tag", False):
 
283
        logger.info(u"Disabling client %s", self.name)
 
284
        if getattr(self, "disable_initiator_tag", False):
380
285
            gobject.source_remove(self.disable_initiator_tag)
381
286
            self.disable_initiator_tag = None
382
 
        if getattr(self, u"checker_initiator_tag", False):
 
287
        if getattr(self, "checker_initiator_tag", False):
383
288
            gobject.source_remove(self.checker_initiator_tag)
384
289
            self.checker_initiator_tag = None
385
290
        self.stop_checker()
412
317
    
413
318
    def checked_ok(self):
414
319
        """Bump up the timeout for this client.
415
 
        
416
320
        This should only be called when the client has been seen,
417
321
        alive and well.
418
322
        """
424
328
    
425
329
    def start_checker(self):
426
330
        """Start a new checker subprocess if one is not running.
427
 
        
428
331
        If a checker already exists, leave it running and do
429
332
        nothing."""
430
333
        # The reason for not killing a running checker is that if we
433
336
        # client would inevitably timeout, since no checker would get
434
337
        # a chance to run to completion.  If we instead leave running
435
338
        # checkers alone, the checker would have to take more time
436
 
        # than 'timeout' for the client to be disabled, which is as it
437
 
        # should be.
 
339
        # than 'timeout' for the client to be declared invalid, which
 
340
        # is as it should be.
438
341
        
439
342
        # If a checker exists, make sure it is not a zombie
440
 
        try:
 
343
        if self.checker is not None:
441
344
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
442
 
        except (AttributeError, OSError), error:
443
 
            if (isinstance(error, OSError)
444
 
                and error.errno != errno.ECHILD):
445
 
                raise error
446
 
        else:
447
345
            if pid:
448
 
                logger.warning(u"Checker was a zombie")
 
346
                logger.warning("Checker was a zombie")
449
347
                gobject.source_remove(self.checker_callback_tag)
450
348
                self.checker_callback(pid, status,
451
349
                                      self.current_checker_command)
456
354
                command = self.checker_command % self.host
457
355
            except TypeError:
458
356
                # Escape attributes for the shell
459
 
                escaped_attrs = dict(
460
 
                    (attr,
461
 
                     re.escape(unicode(str(getattr(self, attr, u"")),
462
 
                                       errors=
463
 
                                       u'replace')))
464
 
                    for attr in
465
 
                    self.runtime_expansions)
466
 
 
 
357
                escaped_attrs = dict((key, re.escape(str(val)))
 
358
                                     for key, val in
 
359
                                     vars(self).iteritems())
467
360
                try:
468
361
                    command = self.checker_command % escaped_attrs
469
362
                except TypeError, error:
480
373
                # always replaced by /dev/null.)
481
374
                self.checker = subprocess.Popen(command,
482
375
                                                close_fds=True,
483
 
                                                shell=True, cwd=u"/")
 
376
                                                shell=True, cwd="/")
484
377
                self.checker_callback_tag = (gobject.child_watch_add
485
378
                                             (self.checker.pid,
486
379
                                              self.checker_callback,
502
395
        if self.checker_callback_tag:
503
396
            gobject.source_remove(self.checker_callback_tag)
504
397
            self.checker_callback_tag = None
505
 
        if getattr(self, u"checker", None) is None:
 
398
        if getattr(self, "checker", None) is None:
506
399
            return
507
400
        logger.debug(u"Stopping checker for %(name)s", vars(self))
508
401
        try:
509
402
            os.kill(self.checker.pid, signal.SIGTERM)
510
 
            #time.sleep(0.5)
 
403
            #os.sleep(0.5)
511
404
            #if self.checker.poll() is None:
512
405
            #    os.kill(self.checker.pid, signal.SIGKILL)
513
406
        except OSError, error:
514
407
            if error.errno != errno.ESRCH: # No such process
515
408
                raise
516
409
        self.checker = None
517
 
 
518
 
def dbus_service_property(dbus_interface, signature=u"v",
519
 
                          access=u"readwrite", byte_arrays=False):
520
 
    """Decorators for marking methods of a DBusObjectWithProperties to
521
 
    become properties on the D-Bus.
522
 
    
523
 
    The decorated method will be called with no arguments by "Get"
524
 
    and with one argument by "Set".
525
 
    
526
 
    The parameters, where they are supported, are the same as
527
 
    dbus.service.method, except there is only "signature", since the
528
 
    type from Get() and the type sent to Set() is the same.
529
 
    """
530
 
    # Encoding deeply encoded byte arrays is not supported yet by the
531
 
    # "Set" method, so we fail early here:
532
 
    if byte_arrays and signature != u"ay":
533
 
        raise ValueError(u"Byte arrays not supported for non-'ay'"
534
 
                         u" signature %r" % signature)
535
 
    def decorator(func):
536
 
        func._dbus_is_property = True
537
 
        func._dbus_interface = dbus_interface
538
 
        func._dbus_signature = signature
539
 
        func._dbus_access = access
540
 
        func._dbus_name = func.__name__
541
 
        if func._dbus_name.endswith(u"_dbus_property"):
542
 
            func._dbus_name = func._dbus_name[:-14]
543
 
        func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
544
 
        return func
545
 
    return decorator
546
 
 
547
 
 
548
 
class DBusPropertyException(dbus.exceptions.DBusException):
549
 
    """A base class for D-Bus property-related exceptions
550
 
    """
551
 
    def __unicode__(self):
552
 
        return unicode(str(self))
553
 
 
554
 
 
555
 
class DBusPropertyAccessException(DBusPropertyException):
556
 
    """A property's access permissions disallows an operation.
557
 
    """
558
 
    pass
559
 
 
560
 
 
561
 
class DBusPropertyNotFound(DBusPropertyException):
562
 
    """An attempt was made to access a non-existing property.
563
 
    """
564
 
    pass
565
 
 
566
 
 
567
 
class DBusObjectWithProperties(dbus.service.Object):
568
 
    """A D-Bus object with properties.
569
 
 
570
 
    Classes inheriting from this can use the dbus_service_property
571
 
    decorator to expose methods as D-Bus properties.  It exposes the
572
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
573
 
    """
574
 
    
575
 
    @staticmethod
576
 
    def _is_dbus_property(obj):
577
 
        return getattr(obj, u"_dbus_is_property", False)
578
 
    
579
 
    def _get_all_dbus_properties(self):
580
 
        """Returns a generator of (name, attribute) pairs
581
 
        """
582
 
        return ((prop._dbus_name, prop)
583
 
                for name, prop in
584
 
                inspect.getmembers(self, self._is_dbus_property))
585
 
    
586
 
    def _get_dbus_property(self, interface_name, property_name):
587
 
        """Returns a bound method if one exists which is a D-Bus
588
 
        property with the specified name and interface.
589
 
        """
590
 
        for name in (property_name,
591
 
                     property_name + u"_dbus_property"):
592
 
            prop = getattr(self, name, None)
593
 
            if (prop is None
594
 
                or not self._is_dbus_property(prop)
595
 
                or prop._dbus_name != property_name
596
 
                or (interface_name and prop._dbus_interface
597
 
                    and interface_name != prop._dbus_interface)):
598
 
                continue
599
 
            return prop
600
 
        # No such property
601
 
        raise DBusPropertyNotFound(self.dbus_object_path + u":"
602
 
                                   + interface_name + u"."
603
 
                                   + property_name)
604
 
    
605
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
606
 
                         out_signature=u"v")
607
 
    def Get(self, interface_name, property_name):
608
 
        """Standard D-Bus property Get() method, see D-Bus standard.
609
 
        """
610
 
        prop = self._get_dbus_property(interface_name, property_name)
611
 
        if prop._dbus_access == u"write":
612
 
            raise DBusPropertyAccessException(property_name)
613
 
        value = prop()
614
 
        if not hasattr(value, u"variant_level"):
615
 
            return value
616
 
        return type(value)(value, variant_level=value.variant_level+1)
617
 
    
618
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
619
 
    def Set(self, interface_name, property_name, value):
620
 
        """Standard D-Bus property Set() method, see D-Bus standard.
621
 
        """
622
 
        prop = self._get_dbus_property(interface_name, property_name)
623
 
        if prop._dbus_access == u"read":
624
 
            raise DBusPropertyAccessException(property_name)
625
 
        if prop._dbus_get_args_options[u"byte_arrays"]:
626
 
            # The byte_arrays option is not supported yet on
627
 
            # signatures other than "ay".
628
 
            if prop._dbus_signature != u"ay":
629
 
                raise ValueError
630
 
            value = dbus.ByteArray(''.join(unichr(byte)
631
 
                                           for byte in value))
632
 
        prop(value)
633
 
    
634
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
635
 
                         out_signature=u"a{sv}")
636
 
    def GetAll(self, interface_name):
637
 
        """Standard D-Bus property GetAll() method, see D-Bus
638
 
        standard.
639
 
 
640
 
        Note: Will not include properties with access="write".
641
 
        """
642
 
        all = {}
643
 
        for name, prop in self._get_all_dbus_properties():
644
 
            if (interface_name
645
 
                and interface_name != prop._dbus_interface):
646
 
                # Interface non-empty but did not match
647
 
                continue
648
 
            # Ignore write-only properties
649
 
            if prop._dbus_access == u"write":
650
 
                continue
651
 
            value = prop()
652
 
            if not hasattr(value, u"variant_level"):
653
 
                all[name] = value
654
 
                continue
655
 
            all[name] = type(value)(value, variant_level=
656
 
                                    value.variant_level+1)
657
 
        return dbus.Dictionary(all, signature=u"sv")
658
 
    
659
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
660
 
                         out_signature=u"s",
661
 
                         path_keyword='object_path',
662
 
                         connection_keyword='connection')
663
 
    def Introspect(self, object_path, connection):
664
 
        """Standard D-Bus method, overloaded to insert property tags.
665
 
        """
666
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
667
 
                                                   connection)
668
 
        try:
669
 
            document = xml.dom.minidom.parseString(xmlstring)
670
 
            def make_tag(document, name, prop):
671
 
                e = document.createElement(u"property")
672
 
                e.setAttribute(u"name", name)
673
 
                e.setAttribute(u"type", prop._dbus_signature)
674
 
                e.setAttribute(u"access", prop._dbus_access)
675
 
                return e
676
 
            for if_tag in document.getElementsByTagName(u"interface"):
677
 
                for tag in (make_tag(document, name, prop)
678
 
                            for name, prop
679
 
                            in self._get_all_dbus_properties()
680
 
                            if prop._dbus_interface
681
 
                            == if_tag.getAttribute(u"name")):
682
 
                    if_tag.appendChild(tag)
683
 
                # Add the names to the return values for the
684
 
                # "org.freedesktop.DBus.Properties" methods
685
 
                if (if_tag.getAttribute(u"name")
686
 
                    == u"org.freedesktop.DBus.Properties"):
687
 
                    for cn in if_tag.getElementsByTagName(u"method"):
688
 
                        if cn.getAttribute(u"name") == u"Get":
689
 
                            for arg in cn.getElementsByTagName(u"arg"):
690
 
                                if (arg.getAttribute(u"direction")
691
 
                                    == u"out"):
692
 
                                    arg.setAttribute(u"name", u"value")
693
 
                        elif cn.getAttribute(u"name") == u"GetAll":
694
 
                            for arg in cn.getElementsByTagName(u"arg"):
695
 
                                if (arg.getAttribute(u"direction")
696
 
                                    == u"out"):
697
 
                                    arg.setAttribute(u"name", u"props")
698
 
            xmlstring = document.toxml(u"utf-8")
699
 
            document.unlink()
700
 
        except (AttributeError, xml.dom.DOMException,
701
 
                xml.parsers.expat.ExpatError), error:
702
 
            logger.error(u"Failed to override Introspection method",
703
 
                         error)
704
 
        return xmlstring
705
 
 
706
 
 
707
 
class ClientDBus(Client, DBusObjectWithProperties):
 
410
    
 
411
    def still_valid(self):
 
412
        """Has the timeout not yet passed for this client?"""
 
413
        if not getattr(self, "enabled", False):
 
414
            return False
 
415
        now = datetime.datetime.utcnow()
 
416
        if self.last_checked_ok is None:
 
417
            return now < (self.created + self.timeout)
 
418
        else:
 
419
            return now < (self.last_checked_ok + self.timeout)
 
420
 
 
421
 
 
422
class ClientDBus(Client, dbus.service.Object):
708
423
    """A Client class using D-Bus
709
 
    
710
424
    Attributes:
711
 
    dbus_object_path: dbus.ObjectPath
712
 
    bus: dbus.SystemBus()
 
425
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
713
426
    """
714
 
    
715
 
    runtime_expansions = (Client.runtime_expansions
716
 
                          + (u"dbus_object_path",))
717
 
    
718
427
    # dbus.service.Object doesn't use super(), so we can't either.
719
428
    
720
 
    def __init__(self, bus = None, *args, **kwargs):
721
 
        self._approvals_pending = 0
722
 
        self.bus = bus
 
429
    def __init__(self, *args, **kwargs):
723
430
        Client.__init__(self, *args, **kwargs)
724
431
        # Only now, when this client is initialized, can it show up on
725
432
        # the D-Bus
726
 
        client_object_name = unicode(self.name).translate(
727
 
            {ord(u"."): ord(u"_"),
728
 
             ord(u"-"): ord(u"_")})
729
433
        self.dbus_object_path = (dbus.ObjectPath
730
 
                                 (u"/clients/" + client_object_name))
731
 
        DBusObjectWithProperties.__init__(self, self.bus,
732
 
                                          self.dbus_object_path)
733
 
        
734
 
    def _get_approvals_pending(self):
735
 
        return self._approvals_pending
736
 
    def _set_approvals_pending(self, value):
737
 
        old_value = self._approvals_pending
738
 
        self._approvals_pending = value
739
 
        bval = bool(value)
740
 
        if (hasattr(self, "dbus_object_path")
741
 
            and bval is not bool(old_value)):
742
 
            dbus_bool = dbus.Boolean(bval, variant_level=1)
743
 
            self.PropertyChanged(dbus.String(u"ApprovalPending"),
744
 
                                 dbus_bool)
745
 
 
746
 
    approvals_pending = property(_get_approvals_pending,
747
 
                                 _set_approvals_pending)
748
 
    del _get_approvals_pending, _set_approvals_pending
749
 
    
750
 
    @staticmethod
751
 
    def _datetime_to_dbus(dt, variant_level=0):
752
 
        """Convert a UTC datetime.datetime() to a D-Bus type."""
753
 
        return dbus.String(dt.isoformat(),
754
 
                           variant_level=variant_level)
755
 
    
 
434
                                 ("/clients/"
 
435
                                  + self.name.replace(".", "_")))
 
436
        dbus.service.Object.__init__(self, bus,
 
437
                                     self.dbus_object_path)
756
438
    def enable(self):
757
 
        oldstate = getattr(self, u"enabled", False)
 
439
        oldstate = getattr(self, "enabled", False)
758
440
        r = Client.enable(self)
759
441
        if oldstate != self.enabled:
760
442
            # Emit D-Bus signals
761
 
            self.PropertyChanged(dbus.String(u"Enabled"),
 
443
            self.PropertyChanged(dbus.String(u"enabled"),
762
444
                                 dbus.Boolean(True, variant_level=1))
763
 
            self.PropertyChanged(
764
 
                dbus.String(u"LastEnabled"),
765
 
                self._datetime_to_dbus(self.last_enabled,
766
 
                                       variant_level=1))
 
445
            self.PropertyChanged(dbus.String(u"last_enabled"),
 
446
                                 (_datetime_to_dbus(self.last_enabled,
 
447
                                                    variant_level=1)))
767
448
        return r
768
449
    
769
 
    def disable(self, quiet = False):
770
 
        oldstate = getattr(self, u"enabled", False)
771
 
        r = Client.disable(self, quiet=quiet)
772
 
        if not quiet and oldstate != self.enabled:
 
450
    def disable(self, signal = True):
 
451
        oldstate = getattr(self, "enabled", False)
 
452
        r = Client.disable(self)
 
453
        if signal and oldstate != self.enabled:
773
454
            # Emit D-Bus signal
774
 
            self.PropertyChanged(dbus.String(u"Enabled"),
 
455
            self.PropertyChanged(dbus.String(u"enabled"),
775
456
                                 dbus.Boolean(False, variant_level=1))
776
457
        return r
777
458
    
780
461
            self.remove_from_connection()
781
462
        except LookupError:
782
463
            pass
783
 
        if hasattr(DBusObjectWithProperties, u"__del__"):
784
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
 
464
        if hasattr(dbus.service.Object, "__del__"):
 
465
            dbus.service.Object.__del__(self, *args, **kwargs)
785
466
        Client.__del__(self, *args, **kwargs)
786
467
    
787
468
    def checker_callback(self, pid, condition, command,
789
470
        self.checker_callback_tag = None
790
471
        self.checker = None
791
472
        # Emit D-Bus signal
792
 
        self.PropertyChanged(dbus.String(u"CheckerRunning"),
 
473
        self.PropertyChanged(dbus.String(u"checker_running"),
793
474
                             dbus.Boolean(False, variant_level=1))
794
475
        if os.WIFEXITED(condition):
795
476
            exitstatus = os.WEXITSTATUS(condition)
810
491
        r = Client.checked_ok(self, *args, **kwargs)
811
492
        # Emit D-Bus signal
812
493
        self.PropertyChanged(
813
 
            dbus.String(u"LastCheckedOK"),
814
 
            (self._datetime_to_dbus(self.last_checked_ok,
815
 
                                    variant_level=1)))
 
494
            dbus.String(u"last_checked_ok"),
 
495
            (_datetime_to_dbus(self.last_checked_ok,
 
496
                               variant_level=1)))
816
497
        return r
817
498
    
818
499
    def start_checker(self, *args, **kwargs):
828
509
            # Emit D-Bus signal
829
510
            self.CheckerStarted(self.current_checker_command)
830
511
            self.PropertyChanged(
831
 
                dbus.String(u"CheckerRunning"),
 
512
                dbus.String("checker_running"),
832
513
                dbus.Boolean(True, variant_level=1))
833
514
        return r
834
515
    
835
516
    def stop_checker(self, *args, **kwargs):
836
 
        old_checker = getattr(self, u"checker", None)
 
517
        old_checker = getattr(self, "checker", None)
837
518
        r = Client.stop_checker(self, *args, **kwargs)
838
519
        if (old_checker is not None
839
 
            and getattr(self, u"checker", None) is None):
840
 
            self.PropertyChanged(dbus.String(u"CheckerRunning"),
 
520
            and getattr(self, "checker", None) is None):
 
521
            self.PropertyChanged(dbus.String(u"checker_running"),
841
522
                                 dbus.Boolean(False, variant_level=1))
842
523
        return r
843
 
 
844
 
    def _reset_approved(self):
845
 
        self._approved = None
846
 
        return False
847
 
    
848
 
    def approve(self, value=True):
849
 
        self.send_changedstate()
850
 
        self._approved = value
851
 
        gobject.timeout_add(self._timedelta_to_milliseconds
852
 
                            (self.approval_duration),
853
 
                            self._reset_approved)
854
 
    
855
 
    
856
 
    ## D-Bus methods, signals & properties
 
524
    
 
525
    ## D-Bus methods & signals
857
526
    _interface = u"se.bsnet.fukt.Mandos.Client"
858
527
    
859
 
    ## Signals
 
528
    # CheckedOK - method
 
529
    CheckedOK = dbus.service.method(_interface)(checked_ok)
 
530
    CheckedOK.__name__ = "CheckedOK"
860
531
    
861
532
    # CheckerCompleted - signal
862
 
    @dbus.service.signal(_interface, signature=u"nxs")
 
533
    @dbus.service.signal(_interface, signature="nxs")
863
534
    def CheckerCompleted(self, exitcode, waitstatus, command):
864
535
        "D-Bus signal"
865
536
        pass
866
537
    
867
538
    # CheckerStarted - signal
868
 
    @dbus.service.signal(_interface, signature=u"s")
 
539
    @dbus.service.signal(_interface, signature="s")
869
540
    def CheckerStarted(self, command):
870
541
        "D-Bus signal"
871
542
        pass
872
543
    
 
544
    # GetAllProperties - method
 
545
    @dbus.service.method(_interface, out_signature="a{sv}")
 
546
    def GetAllProperties(self):
 
547
        "D-Bus method"
 
548
        return dbus.Dictionary({
 
549
                dbus.String("name"):
 
550
                    dbus.String(self.name, variant_level=1),
 
551
                dbus.String("fingerprint"):
 
552
                    dbus.String(self.fingerprint, variant_level=1),
 
553
                dbus.String("host"):
 
554
                    dbus.String(self.host, variant_level=1),
 
555
                dbus.String("created"):
 
556
                    _datetime_to_dbus(self.created, variant_level=1),
 
557
                dbus.String("last_enabled"):
 
558
                    (_datetime_to_dbus(self.last_enabled,
 
559
                                       variant_level=1)
 
560
                     if self.last_enabled is not None
 
561
                     else dbus.Boolean(False, variant_level=1)),
 
562
                dbus.String("enabled"):
 
563
                    dbus.Boolean(self.enabled, variant_level=1),
 
564
                dbus.String("last_checked_ok"):
 
565
                    (_datetime_to_dbus(self.last_checked_ok,
 
566
                                       variant_level=1)
 
567
                     if self.last_checked_ok is not None
 
568
                     else dbus.Boolean (False, variant_level=1)),
 
569
                dbus.String("timeout"):
 
570
                    dbus.UInt64(self.timeout_milliseconds(),
 
571
                                variant_level=1),
 
572
                dbus.String("interval"):
 
573
                    dbus.UInt64(self.interval_milliseconds(),
 
574
                                variant_level=1),
 
575
                dbus.String("checker"):
 
576
                    dbus.String(self.checker_command,
 
577
                                variant_level=1),
 
578
                dbus.String("checker_running"):
 
579
                    dbus.Boolean(self.checker is not None,
 
580
                                 variant_level=1),
 
581
                dbus.String("object_path"):
 
582
                    dbus.ObjectPath(self.dbus_object_path,
 
583
                                    variant_level=1)
 
584
                }, signature="sv")
 
585
    
 
586
    # IsStillValid - method
 
587
    @dbus.service.method(_interface, out_signature="b")
 
588
    def IsStillValid(self):
 
589
        return self.still_valid()
 
590
    
873
591
    # PropertyChanged - signal
874
 
    @dbus.service.signal(_interface, signature=u"sv")
 
592
    @dbus.service.signal(_interface, signature="sv")
875
593
    def PropertyChanged(self, property, value):
876
594
        "D-Bus signal"
877
595
        pass
878
596
    
879
 
    # GotSecret - signal
 
597
    # ReceivedSecret - signal
880
598
    @dbus.service.signal(_interface)
881
 
    def GotSecret(self):
882
 
        """D-Bus signal
883
 
        Is sent after a successful transfer of secret from the Mandos
884
 
        server to mandos-client
885
 
        """
 
599
    def ReceivedSecret(self):
 
600
        "D-Bus signal"
886
601
        pass
887
602
    
888
603
    # Rejected - signal
889
 
    @dbus.service.signal(_interface, signature=u"s")
890
 
    def Rejected(self, reason):
891
 
        "D-Bus signal"
892
 
        pass
893
 
    
894
 
    # NeedApproval - signal
895
 
    @dbus.service.signal(_interface, signature=u"tb")
896
 
    def NeedApproval(self, timeout, default):
897
 
        "D-Bus signal"
898
 
        pass
899
 
    
900
 
    ## Methods
901
 
 
902
 
    # Approve - method
903
 
    @dbus.service.method(_interface, in_signature=u"b")
904
 
    def Approve(self, value):
905
 
        self.approve(value)
906
 
 
907
 
    # CheckedOK - method
908
 
    @dbus.service.method(_interface)
909
 
    def CheckedOK(self):
910
 
        return self.checked_ok()
 
604
    @dbus.service.signal(_interface)
 
605
    def Rejected(self):
 
606
        "D-Bus signal"
 
607
        pass
 
608
    
 
609
    # SetChecker - method
 
610
    @dbus.service.method(_interface, in_signature="s")
 
611
    def SetChecker(self, checker):
 
612
        "D-Bus setter method"
 
613
        self.checker_command = checker
 
614
        # Emit D-Bus signal
 
615
        self.PropertyChanged(dbus.String(u"checker"),
 
616
                             dbus.String(self.checker_command,
 
617
                                         variant_level=1))
 
618
    
 
619
    # SetHost - method
 
620
    @dbus.service.method(_interface, in_signature="s")
 
621
    def SetHost(self, host):
 
622
        "D-Bus setter method"
 
623
        self.host = host
 
624
        # Emit D-Bus signal
 
625
        self.PropertyChanged(dbus.String(u"host"),
 
626
                             dbus.String(self.host, variant_level=1))
 
627
    
 
628
    # SetInterval - method
 
629
    @dbus.service.method(_interface, in_signature="t")
 
630
    def SetInterval(self, milliseconds):
 
631
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
 
632
        # Emit D-Bus signal
 
633
        self.PropertyChanged(dbus.String(u"interval"),
 
634
                             (dbus.UInt64(self.interval_milliseconds(),
 
635
                                          variant_level=1)))
 
636
    
 
637
    # SetSecret - method
 
638
    @dbus.service.method(_interface, in_signature="ay",
 
639
                         byte_arrays=True)
 
640
    def SetSecret(self, secret):
 
641
        "D-Bus setter method"
 
642
        self.secret = str(secret)
 
643
    
 
644
    # SetTimeout - method
 
645
    @dbus.service.method(_interface, in_signature="t")
 
646
    def SetTimeout(self, milliseconds):
 
647
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
 
648
        # Emit D-Bus signal
 
649
        self.PropertyChanged(dbus.String(u"timeout"),
 
650
                             (dbus.UInt64(self.timeout_milliseconds(),
 
651
                                          variant_level=1)))
911
652
    
912
653
    # Enable - method
913
 
    @dbus.service.method(_interface)
914
 
    def Enable(self):
915
 
        "D-Bus method"
916
 
        self.enable()
 
654
    Enable = dbus.service.method(_interface)(enable)
 
655
    Enable.__name__ = "Enable"
917
656
    
918
657
    # StartChecker - method
919
658
    @dbus.service.method(_interface)
928
667
        self.disable()
929
668
    
930
669
    # StopChecker - method
931
 
    @dbus.service.method(_interface)
932
 
    def StopChecker(self):
933
 
        self.stop_checker()
934
 
    
935
 
    ## Properties
936
 
    
937
 
    # ApprovalPending - property
938
 
    @dbus_service_property(_interface, signature=u"b", access=u"read")
939
 
    def ApprovalPending_dbus_property(self):
940
 
        return dbus.Boolean(bool(self.approvals_pending))
941
 
    
942
 
    # ApprovedByDefault - property
943
 
    @dbus_service_property(_interface, signature=u"b",
944
 
                           access=u"readwrite")
945
 
    def ApprovedByDefault_dbus_property(self, value=None):
946
 
        if value is None:       # get
947
 
            return dbus.Boolean(self.approved_by_default)
948
 
        self.approved_by_default = bool(value)
949
 
        # Emit D-Bus signal
950
 
        self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
951
 
                             dbus.Boolean(value, variant_level=1))
952
 
    
953
 
    # ApprovalDelay - property
954
 
    @dbus_service_property(_interface, signature=u"t",
955
 
                           access=u"readwrite")
956
 
    def ApprovalDelay_dbus_property(self, value=None):
957
 
        if value is None:       # get
958
 
            return dbus.UInt64(self.approval_delay_milliseconds())
959
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
960
 
        # Emit D-Bus signal
961
 
        self.PropertyChanged(dbus.String(u"ApprovalDelay"),
962
 
                             dbus.UInt64(value, variant_level=1))
963
 
    
964
 
    # ApprovalDuration - property
965
 
    @dbus_service_property(_interface, signature=u"t",
966
 
                           access=u"readwrite")
967
 
    def ApprovalDuration_dbus_property(self, value=None):
968
 
        if value is None:       # get
969
 
            return dbus.UInt64(self._timedelta_to_milliseconds(
970
 
                    self.approval_duration))
971
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
972
 
        # Emit D-Bus signal
973
 
        self.PropertyChanged(dbus.String(u"ApprovalDuration"),
974
 
                             dbus.UInt64(value, variant_level=1))
975
 
    
976
 
    # Name - property
977
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
978
 
    def Name_dbus_property(self):
979
 
        return dbus.String(self.name)
980
 
    
981
 
    # Fingerprint - property
982
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
983
 
    def Fingerprint_dbus_property(self):
984
 
        return dbus.String(self.fingerprint)
985
 
    
986
 
    # Host - property
987
 
    @dbus_service_property(_interface, signature=u"s",
988
 
                           access=u"readwrite")
989
 
    def Host_dbus_property(self, value=None):
990
 
        if value is None:       # get
991
 
            return dbus.String(self.host)
992
 
        self.host = value
993
 
        # Emit D-Bus signal
994
 
        self.PropertyChanged(dbus.String(u"Host"),
995
 
                             dbus.String(value, variant_level=1))
996
 
    
997
 
    # Created - property
998
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
999
 
    def Created_dbus_property(self):
1000
 
        return dbus.String(self._datetime_to_dbus(self.created))
1001
 
    
1002
 
    # LastEnabled - property
1003
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
1004
 
    def LastEnabled_dbus_property(self):
1005
 
        if self.last_enabled is None:
1006
 
            return dbus.String(u"")
1007
 
        return dbus.String(self._datetime_to_dbus(self.last_enabled))
1008
 
    
1009
 
    # Enabled - property
1010
 
    @dbus_service_property(_interface, signature=u"b",
1011
 
                           access=u"readwrite")
1012
 
    def Enabled_dbus_property(self, value=None):
1013
 
        if value is None:       # get
1014
 
            return dbus.Boolean(self.enabled)
1015
 
        if value:
1016
 
            self.enable()
1017
 
        else:
1018
 
            self.disable()
1019
 
    
1020
 
    # LastCheckedOK - property
1021
 
    @dbus_service_property(_interface, signature=u"s",
1022
 
                           access=u"readwrite")
1023
 
    def LastCheckedOK_dbus_property(self, value=None):
1024
 
        if value is not None:
1025
 
            self.checked_ok()
1026
 
            return
1027
 
        if self.last_checked_ok is None:
1028
 
            return dbus.String(u"")
1029
 
        return dbus.String(self._datetime_to_dbus(self
1030
 
                                                  .last_checked_ok))
1031
 
    
1032
 
    # Timeout - property
1033
 
    @dbus_service_property(_interface, signature=u"t",
1034
 
                           access=u"readwrite")
1035
 
    def Timeout_dbus_property(self, value=None):
1036
 
        if value is None:       # get
1037
 
            return dbus.UInt64(self.timeout_milliseconds())
1038
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1039
 
        # Emit D-Bus signal
1040
 
        self.PropertyChanged(dbus.String(u"Timeout"),
1041
 
                             dbus.UInt64(value, variant_level=1))
1042
 
        if getattr(self, u"disable_initiator_tag", None) is None:
1043
 
            return
1044
 
        # Reschedule timeout
1045
 
        gobject.source_remove(self.disable_initiator_tag)
1046
 
        self.disable_initiator_tag = None
1047
 
        time_to_die = (self.
1048
 
                       _timedelta_to_milliseconds((self
1049
 
                                                   .last_checked_ok
1050
 
                                                   + self.timeout)
1051
 
                                                  - datetime.datetime
1052
 
                                                  .utcnow()))
1053
 
        if time_to_die <= 0:
1054
 
            # The timeout has passed
1055
 
            self.disable()
1056
 
        else:
1057
 
            self.disable_initiator_tag = (gobject.timeout_add
1058
 
                                          (time_to_die, self.disable))
1059
 
    
1060
 
    # Interval - property
1061
 
    @dbus_service_property(_interface, signature=u"t",
1062
 
                           access=u"readwrite")
1063
 
    def Interval_dbus_property(self, value=None):
1064
 
        if value is None:       # get
1065
 
            return dbus.UInt64(self.interval_milliseconds())
1066
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1067
 
        # Emit D-Bus signal
1068
 
        self.PropertyChanged(dbus.String(u"Interval"),
1069
 
                             dbus.UInt64(value, variant_level=1))
1070
 
        if getattr(self, u"checker_initiator_tag", None) is None:
1071
 
            return
1072
 
        # Reschedule checker run
1073
 
        gobject.source_remove(self.checker_initiator_tag)
1074
 
        self.checker_initiator_tag = (gobject.timeout_add
1075
 
                                      (value, self.start_checker))
1076
 
        self.start_checker()    # Start one now, too
1077
 
 
1078
 
    # Checker - property
1079
 
    @dbus_service_property(_interface, signature=u"s",
1080
 
                           access=u"readwrite")
1081
 
    def Checker_dbus_property(self, value=None):
1082
 
        if value is None:       # get
1083
 
            return dbus.String(self.checker_command)
1084
 
        self.checker_command = value
1085
 
        # Emit D-Bus signal
1086
 
        self.PropertyChanged(dbus.String(u"Checker"),
1087
 
                             dbus.String(self.checker_command,
1088
 
                                         variant_level=1))
1089
 
    
1090
 
    # CheckerRunning - property
1091
 
    @dbus_service_property(_interface, signature=u"b",
1092
 
                           access=u"readwrite")
1093
 
    def CheckerRunning_dbus_property(self, value=None):
1094
 
        if value is None:       # get
1095
 
            return dbus.Boolean(self.checker is not None)
1096
 
        if value:
1097
 
            self.start_checker()
1098
 
        else:
1099
 
            self.stop_checker()
1100
 
    
1101
 
    # ObjectPath - property
1102
 
    @dbus_service_property(_interface, signature=u"o", access=u"read")
1103
 
    def ObjectPath_dbus_property(self):
1104
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1105
 
    
1106
 
    # Secret = property
1107
 
    @dbus_service_property(_interface, signature=u"ay",
1108
 
                           access=u"write", byte_arrays=True)
1109
 
    def Secret_dbus_property(self, value):
1110
 
        self.secret = str(value)
 
670
    StopChecker = dbus.service.method(_interface)(stop_checker)
 
671
    StopChecker.__name__ = "StopChecker"
1111
672
    
1112
673
    del _interface
1113
674
 
1114
675
 
1115
 
class ProxyClient(object):
1116
 
    def __init__(self, child_pipe, fpr, address):
1117
 
        self._pipe = child_pipe
1118
 
        self._pipe.send(('init', fpr, address))
1119
 
        if not self._pipe.recv():
1120
 
            raise KeyError()
1121
 
 
1122
 
    def __getattribute__(self, name):
1123
 
        if(name == '_pipe'):
1124
 
            return super(ProxyClient, self).__getattribute__(name)
1125
 
        self._pipe.send(('getattr', name))
1126
 
        data = self._pipe.recv()
1127
 
        if data[0] == 'data':
1128
 
            return data[1]
1129
 
        if data[0] == 'function':
1130
 
            def func(*args, **kwargs):
1131
 
                self._pipe.send(('funcall', name, args, kwargs))
1132
 
                return self._pipe.recv()[1]
1133
 
            return func
1134
 
 
1135
 
    def __setattr__(self, name, value):
1136
 
        if(name == '_pipe'):
1137
 
            return super(ProxyClient, self).__setattr__(name, value)
1138
 
        self._pipe.send(('setattr', name, value))
1139
 
 
1140
 
 
1141
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1142
 
    """A class to handle client connections.
1143
 
    
1144
 
    Instantiated once for each connection to handle it.
 
676
def peer_certificate(session):
 
677
    "Return the peer's OpenPGP certificate as a bytestring"
 
678
    # If not an OpenPGP certificate...
 
679
    if (gnutls.library.functions
 
680
        .gnutls_certificate_type_get(session._c_object)
 
681
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
682
        # ...do the normal thing
 
683
        return session.peer_certificate
 
684
    list_size = ctypes.c_uint(1)
 
685
    cert_list = (gnutls.library.functions
 
686
                 .gnutls_certificate_get_peers
 
687
                 (session._c_object, ctypes.byref(list_size)))
 
688
    if not bool(cert_list) and list_size.value != 0:
 
689
        raise gnutls.errors.GNUTLSError("error getting peer"
 
690
                                        " certificate")
 
691
    if list_size.value == 0:
 
692
        return None
 
693
    cert = cert_list[0]
 
694
    return ctypes.string_at(cert.data, cert.size)
 
695
 
 
696
 
 
697
def fingerprint(openpgp):
 
698
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
699
    # New GnuTLS "datum" with the OpenPGP public key
 
700
    datum = (gnutls.library.types
 
701
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
702
                                         ctypes.POINTER
 
703
                                         (ctypes.c_ubyte)),
 
704
                             ctypes.c_uint(len(openpgp))))
 
705
    # New empty GnuTLS certificate
 
706
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
707
    (gnutls.library.functions
 
708
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
709
    # Import the OpenPGP public key into the certificate
 
710
    (gnutls.library.functions
 
711
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
712
                                gnutls.library.constants
 
713
                                .GNUTLS_OPENPGP_FMT_RAW))
 
714
    # Verify the self signature in the key
 
715
    crtverify = ctypes.c_uint()
 
716
    (gnutls.library.functions
 
717
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
 
718
    if crtverify.value != 0:
 
719
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
720
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
721
    # New buffer for the fingerprint
 
722
    buf = ctypes.create_string_buffer(20)
 
723
    buf_len = ctypes.c_size_t()
 
724
    # Get the fingerprint from the certificate into the buffer
 
725
    (gnutls.library.functions
 
726
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
727
                                         ctypes.byref(buf_len)))
 
728
    # Deinit the certificate
 
729
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
730
    # Convert the buffer to a Python bytestring
 
731
    fpr = ctypes.string_at(buf, buf_len.value)
 
732
    # Convert the bytestring to hexadecimal notation
 
733
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
734
    return hex_fpr
 
735
 
 
736
 
 
737
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
738
    """A TCP request handler class.
 
739
    Instantiated by IPv6_TCPServer for each request to handle it.
1145
740
    Note: This will run in its own forked process."""
1146
741
    
1147
742
    def handle(self):
1148
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1149
 
            logger.info(u"TCP connection from: %s",
1150
 
                        unicode(self.client_address))
1151
 
            logger.debug(u"Pipe FD: %d",
1152
 
                         self.server.child_pipe.fileno())
1153
 
 
 
743
        logger.info(u"TCP connection from: %s",
 
744
                    unicode(self.client_address))
 
745
        logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
 
746
        # Open IPC pipe to parent process
 
747
        with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
1154
748
            session = (gnutls.connection
1155
749
                       .ClientSession(self.request,
1156
750
                                      gnutls.connection
1157
751
                                      .X509Credentials()))
1158
 
 
 
752
            
 
753
            line = self.request.makefile().readline()
 
754
            logger.debug(u"Protocol version: %r", line)
 
755
            try:
 
756
                if int(line.strip().split()[0]) > 1:
 
757
                    raise RuntimeError
 
758
            except (ValueError, IndexError, RuntimeError), error:
 
759
                logger.error(u"Unknown protocol version: %s", error)
 
760
                return
 
761
            
1159
762
            # Note: gnutls.connection.X509Credentials is really a
1160
763
            # generic GnuTLS certificate credentials object so long as
1161
764
            # no X.509 keys are added to it.  Therefore, we can use it
1162
765
            # here despite using OpenPGP certificates.
1163
 
 
1164
 
            #priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1165
 
            #                      u"+AES-256-CBC", u"+SHA1",
1166
 
            #                      u"+COMP-NULL", u"+CTYPE-OPENPGP",
1167
 
            #                      u"+DHE-DSS"))
 
766
            
 
767
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
 
768
            #                     "+AES-256-CBC", "+SHA1",
 
769
            #                     "+COMP-NULL", "+CTYPE-OPENPGP",
 
770
            #                     "+DHE-DSS"))
1168
771
            # Use a fallback default, since this MUST be set.
1169
 
            priority = self.server.gnutls_priority
1170
 
            if priority is None:
1171
 
                priority = u"NORMAL"
 
772
            priority = self.server.settings.get("priority", "NORMAL")
1172
773
            (gnutls.library.functions
1173
774
             .gnutls_priority_set_direct(session._c_object,
1174
775
                                         priority, None))
1175
 
 
1176
 
            # Start communication using the Mandos protocol
1177
 
            # Get protocol number
1178
 
            line = self.request.makefile().readline()
1179
 
            logger.debug(u"Protocol version: %r", line)
1180
 
            try:
1181
 
                if int(line.strip().split()[0]) > 1:
1182
 
                    raise RuntimeError
1183
 
            except (ValueError, IndexError, RuntimeError), error:
1184
 
                logger.error(u"Unknown protocol version: %s", error)
1185
 
                return
1186
 
 
1187
 
            # Start GnuTLS connection
 
776
            
1188
777
            try:
1189
778
                session.handshake()
1190
779
            except gnutls.errors.GNUTLSError, error:
1193
782
                # established.  Just abandon the request.
1194
783
                return
1195
784
            logger.debug(u"Handshake succeeded")
1196
 
 
1197
 
            approval_required = False
1198
785
            try:
1199
 
                try:
1200
 
                    fpr = self.fingerprint(self.peer_certificate
1201
 
                                           (session))
1202
 
                except (TypeError, gnutls.errors.GNUTLSError), error:
1203
 
                    logger.warning(u"Bad certificate: %s", error)
1204
 
                    return
1205
 
                logger.debug(u"Fingerprint: %s", fpr)
1206
 
 
1207
 
                try:
1208
 
                    client = ProxyClient(child_pipe, fpr,
1209
 
                                         self.client_address)
1210
 
                except KeyError:
1211
 
                    return
1212
 
                
1213
 
                if client.approval_delay:
1214
 
                    delay = client.approval_delay
1215
 
                    client.approvals_pending += 1
1216
 
                    approval_required = True
1217
 
                
1218
 
                while True:
1219
 
                    if not client.enabled:
1220
 
                        logger.warning(u"Client %s is disabled",
1221
 
                                       client.name)
1222
 
                        if self.server.use_dbus:
1223
 
                            # Emit D-Bus signal
1224
 
                            client.Rejected("Disabled")                    
1225
 
                        return
1226
 
                    
1227
 
                    if client._approved or not client.approval_delay:
1228
 
                        #We are approved or approval is disabled
1229
 
                        break
1230
 
                    elif client._approved is None:
1231
 
                        logger.info(u"Client %s needs approval",
1232
 
                                    client.name)
1233
 
                        if self.server.use_dbus:
1234
 
                            # Emit D-Bus signal
1235
 
                            client.NeedApproval(
1236
 
                                client.approval_delay_milliseconds(),
1237
 
                                client.approved_by_default)
1238
 
                    else:
1239
 
                        logger.warning(u"Client %s was not approved",
1240
 
                                       client.name)
1241
 
                        if self.server.use_dbus:
1242
 
                            # Emit D-Bus signal
1243
 
                            client.Rejected("Denied")
1244
 
                        return
1245
 
                    
1246
 
                    #wait until timeout or approved
1247
 
                    #x = float(client._timedelta_to_milliseconds(delay))
1248
 
                    time = datetime.datetime.now()
1249
 
                    client.changedstate.acquire()
1250
 
                    client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1251
 
                    client.changedstate.release()
1252
 
                    time2 = datetime.datetime.now()
1253
 
                    if (time2 - time) >= delay:
1254
 
                        if not client.approved_by_default:
1255
 
                            logger.warning("Client %s timed out while"
1256
 
                                           " waiting for approval",
1257
 
                                           client.name)
1258
 
                            if self.server.use_dbus:
1259
 
                                # Emit D-Bus signal
1260
 
                                client.Rejected("Approval timed out")
1261
 
                            return
1262
 
                        else:
1263
 
                            break
1264
 
                    else:
1265
 
                        delay -= time2 - time
1266
 
                
1267
 
                sent_size = 0
1268
 
                while sent_size < len(client.secret):
1269
 
                    try:
1270
 
                        sent = session.send(client.secret[sent_size:])
1271
 
                    except (gnutls.errors.GNUTLSError), error:
1272
 
                        logger.warning("gnutls send failed")
1273
 
                        return
1274
 
                    logger.debug(u"Sent: %d, remaining: %d",
1275
 
                                 sent, len(client.secret)
1276
 
                                 - (sent_size + sent))
1277
 
                    sent_size += sent
1278
 
 
1279
 
                logger.info(u"Sending secret to %s", client.name)
1280
 
                # bump the timeout as if seen
1281
 
                client.checked_ok()
1282
 
                if self.server.use_dbus:
1283
 
                    # Emit D-Bus signal
1284
 
                    client.GotSecret()
1285
 
            
1286
 
            finally:
1287
 
                if approval_required:
1288
 
                    client.approvals_pending -= 1
1289
 
                try:
1290
 
                    session.bye()
1291
 
                except (gnutls.errors.GNUTLSError), error:
1292
 
                    logger.warning("GnuTLS bye failed")
1293
 
    
1294
 
    @staticmethod
1295
 
    def peer_certificate(session):
1296
 
        "Return the peer's OpenPGP certificate as a bytestring"
1297
 
        # If not an OpenPGP certificate...
1298
 
        if (gnutls.library.functions
1299
 
            .gnutls_certificate_type_get(session._c_object)
1300
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1301
 
            # ...do the normal thing
1302
 
            return session.peer_certificate
1303
 
        list_size = ctypes.c_uint(1)
1304
 
        cert_list = (gnutls.library.functions
1305
 
                     .gnutls_certificate_get_peers
1306
 
                     (session._c_object, ctypes.byref(list_size)))
1307
 
        if not bool(cert_list) and list_size.value != 0:
1308
 
            raise gnutls.errors.GNUTLSError(u"error getting peer"
1309
 
                                            u" certificate")
1310
 
        if list_size.value == 0:
1311
 
            return None
1312
 
        cert = cert_list[0]
1313
 
        return ctypes.string_at(cert.data, cert.size)
1314
 
    
1315
 
    @staticmethod
1316
 
    def fingerprint(openpgp):
1317
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1318
 
        # New GnuTLS "datum" with the OpenPGP public key
1319
 
        datum = (gnutls.library.types
1320
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1321
 
                                             ctypes.POINTER
1322
 
                                             (ctypes.c_ubyte)),
1323
 
                                 ctypes.c_uint(len(openpgp))))
1324
 
        # New empty GnuTLS certificate
1325
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1326
 
        (gnutls.library.functions
1327
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1328
 
        # Import the OpenPGP public key into the certificate
1329
 
        (gnutls.library.functions
1330
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1331
 
                                    gnutls.library.constants
1332
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1333
 
        # Verify the self signature in the key
1334
 
        crtverify = ctypes.c_uint()
1335
 
        (gnutls.library.functions
1336
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1337
 
                                         ctypes.byref(crtverify)))
1338
 
        if crtverify.value != 0:
1339
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1340
 
            raise (gnutls.errors.CertificateSecurityError
1341
 
                   (u"Verify failed"))
1342
 
        # New buffer for the fingerprint
1343
 
        buf = ctypes.create_string_buffer(20)
1344
 
        buf_len = ctypes.c_size_t()
1345
 
        # Get the fingerprint from the certificate into the buffer
1346
 
        (gnutls.library.functions
1347
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1348
 
                                             ctypes.byref(buf_len)))
1349
 
        # Deinit the certificate
1350
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1351
 
        # Convert the buffer to a Python bytestring
1352
 
        fpr = ctypes.string_at(buf, buf_len.value)
1353
 
        # Convert the bytestring to hexadecimal notation
1354
 
        hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1355
 
        return hex_fpr
1356
 
 
1357
 
 
1358
 
class MultiprocessingMixIn(object):
1359
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1360
 
    def sub_process_main(self, request, address):
1361
 
        try:
1362
 
            self.finish_request(request, address)
1363
 
        except:
1364
 
            self.handle_error(request, address)
1365
 
        self.close_request(request)
1366
 
            
1367
 
    def process_request(self, request, address):
1368
 
        """Start a new process to process the request."""
1369
 
        multiprocessing.Process(target = self.sub_process_main,
1370
 
                                args = (request, address)).start()
1371
 
 
1372
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1373
 
    """ adds a pipe to the MixIn """
 
786
                fpr = fingerprint(peer_certificate(session))
 
787
            except (TypeError, gnutls.errors.GNUTLSError), error:
 
788
                logger.warning(u"Bad certificate: %s", error)
 
789
                session.bye()
 
790
                return
 
791
            logger.debug(u"Fingerprint: %s", fpr)
 
792
            
 
793
            for c in self.server.clients:
 
794
                if c.fingerprint == fpr:
 
795
                    client = c
 
796
                    break
 
797
            else:
 
798
                logger.warning(u"Client not found for fingerprint: %s",
 
799
                               fpr)
 
800
                ipc.write("NOTFOUND %s\n" % fpr)
 
801
                session.bye()
 
802
                return
 
803
            # Have to check if client.still_valid(), since it is
 
804
            # possible that the client timed out while establishing
 
805
            # the GnuTLS session.
 
806
            if not client.still_valid():
 
807
                logger.warning(u"Client %(name)s is invalid",
 
808
                               vars(client))
 
809
                ipc.write("INVALID %s\n" % client.name)
 
810
                session.bye()
 
811
                return
 
812
            ipc.write("SENDING %s\n" % client.name)
 
813
            sent_size = 0
 
814
            while sent_size < len(client.secret):
 
815
                sent = session.send(client.secret[sent_size:])
 
816
                logger.debug(u"Sent: %d, remaining: %d",
 
817
                             sent, len(client.secret)
 
818
                             - (sent_size + sent))
 
819
                sent_size += sent
 
820
            session.bye()
 
821
 
 
822
 
 
823
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
 
824
    """Like SocketServer.ForkingMixIn, but also pass a pipe.
 
825
    Assumes a gobject.MainLoop event loop.
 
826
    """
1374
827
    def process_request(self, request, client_address):
1375
 
        """Overrides and wraps the original process_request().
1376
 
        
1377
 
        This function creates a new pipe in self.pipe
 
828
        """This overrides and wraps the original process_request().
 
829
        This function creates a new pipe in self.pipe 
1378
830
        """
1379
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1380
 
 
1381
 
        super(MultiprocessingMixInWithPipe,
 
831
        self.pipe = os.pipe()
 
832
        super(ForkingMixInWithPipe,
1382
833
              self).process_request(request, client_address)
1383
 
        self.child_pipe.close()
1384
 
        self.add_pipe(parent_pipe)
1385
 
 
1386
 
    def add_pipe(self, parent_pipe):
 
834
        os.close(self.pipe[1])  # close write end
 
835
        # Call "handle_ipc" for both data and EOF events
 
836
        gobject.io_add_watch(self.pipe[0],
 
837
                             gobject.IO_IN | gobject.IO_HUP,
 
838
                             self.handle_ipc)
 
839
    def handle_ipc(source, condition):
1387
840
        """Dummy function; override as necessary"""
1388
 
        pass
1389
 
 
1390
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1391
 
                     socketserver.TCPServer, object):
 
841
        os.close(source)
 
842
        return False
 
843
 
 
844
 
 
845
class IPv6_TCPServer(ForkingMixInWithPipe,
 
846
                     SocketServer.TCPServer, object):
1392
847
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1393
 
    
1394
848
    Attributes:
 
849
        settings:       Server settings
 
850
        clients:        Set() of Client objects
1395
851
        enabled:        Boolean; whether this server is activated yet
1396
 
        interface:      None or a network interface name (string)
1397
 
        use_ipv6:       Boolean; to use IPv6 or not
1398
852
    """
1399
 
    def __init__(self, server_address, RequestHandlerClass,
1400
 
                 interface=None, use_ipv6=True):
1401
 
        self.interface = interface
1402
 
        if use_ipv6:
1403
 
            self.address_family = socket.AF_INET6
1404
 
        socketserver.TCPServer.__init__(self, server_address,
1405
 
                                        RequestHandlerClass)
 
853
    address_family = socket.AF_INET6
 
854
    def __init__(self, *args, **kwargs):
 
855
        if "settings" in kwargs:
 
856
            self.settings = kwargs["settings"]
 
857
            del kwargs["settings"]
 
858
        if "clients" in kwargs:
 
859
            self.clients = kwargs["clients"]
 
860
            del kwargs["clients"]
 
861
        if "use_ipv6" in kwargs:
 
862
            if not kwargs["use_ipv6"]:
 
863
                self.address_family = socket.AF_INET
 
864
            del kwargs["use_ipv6"]
 
865
        self.enabled = False
 
866
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1406
867
    def server_bind(self):
1407
868
        """This overrides the normal server_bind() function
1408
869
        to bind to an interface if one was specified, and also NOT to
1409
870
        bind to an address or port if they were not specified."""
1410
 
        if self.interface is not None:
1411
 
            if SO_BINDTODEVICE is None:
1412
 
                logger.error(u"SO_BINDTODEVICE does not exist;"
1413
 
                             u" cannot bind to interface %s",
1414
 
                             self.interface)
1415
 
            else:
1416
 
                try:
1417
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1418
 
                                           SO_BINDTODEVICE,
1419
 
                                           str(self.interface
1420
 
                                               + u'\0'))
1421
 
                except socket.error, error:
1422
 
                    if error[0] == errno.EPERM:
1423
 
                        logger.error(u"No permission to"
1424
 
                                     u" bind to interface %s",
1425
 
                                     self.interface)
1426
 
                    elif error[0] == errno.ENOPROTOOPT:
1427
 
                        logger.error(u"SO_BINDTODEVICE not available;"
1428
 
                                     u" cannot bind to interface %s",
1429
 
                                     self.interface)
1430
 
                    else:
1431
 
                        raise
 
871
        if self.settings["interface"]:
 
872
            # 25 is from /usr/include/asm-i486/socket.h
 
873
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
 
874
            try:
 
875
                self.socket.setsockopt(socket.SOL_SOCKET,
 
876
                                       SO_BINDTODEVICE,
 
877
                                       self.settings["interface"])
 
878
            except socket.error, error:
 
879
                if error[0] == errno.EPERM:
 
880
                    logger.error(u"No permission to"
 
881
                                 u" bind to interface %s",
 
882
                                 self.settings["interface"])
 
883
                else:
 
884
                    raise
1432
885
        # Only bind(2) the socket if we really need to.
1433
886
        if self.server_address[0] or self.server_address[1]:
1434
887
            if not self.server_address[0]:
1435
888
                if self.address_family == socket.AF_INET6:
1436
 
                    any_address = u"::" # in6addr_any
 
889
                    any_address = "::" # in6addr_any
1437
890
                else:
1438
891
                    any_address = socket.INADDR_ANY
1439
892
                self.server_address = (any_address,
1441
894
            elif not self.server_address[1]:
1442
895
                self.server_address = (self.server_address[0],
1443
896
                                       0)
1444
 
#                 if self.interface:
 
897
#                 if self.settings["interface"]:
1445
898
#                     self.server_address = (self.server_address[0],
1446
899
#                                            0, # port
1447
900
#                                            0, # flowinfo
1448
901
#                                            if_nametoindex
1449
 
#                                            (self.interface))
1450
 
            return socketserver.TCPServer.server_bind(self)
1451
 
 
1452
 
 
1453
 
class MandosServer(IPv6_TCPServer):
1454
 
    """Mandos server.
1455
 
    
1456
 
    Attributes:
1457
 
        clients:        set of Client objects
1458
 
        gnutls_priority GnuTLS priority string
1459
 
        use_dbus:       Boolean; to emit D-Bus signals or not
1460
 
    
1461
 
    Assumes a gobject.MainLoop event loop.
1462
 
    """
1463
 
    def __init__(self, server_address, RequestHandlerClass,
1464
 
                 interface=None, use_ipv6=True, clients=None,
1465
 
                 gnutls_priority=None, use_dbus=True):
1466
 
        self.enabled = False
1467
 
        self.clients = clients
1468
 
        if self.clients is None:
1469
 
            self.clients = set()
1470
 
        self.use_dbus = use_dbus
1471
 
        self.gnutls_priority = gnutls_priority
1472
 
        IPv6_TCPServer.__init__(self, server_address,
1473
 
                                RequestHandlerClass,
1474
 
                                interface = interface,
1475
 
                                use_ipv6 = use_ipv6)
 
902
#                                            (self.settings
 
903
#                                             ["interface"]))
 
904
            return super(IPv6_TCPServer, self).server_bind()
1476
905
    def server_activate(self):
1477
906
        if self.enabled:
1478
 
            return socketserver.TCPServer.server_activate(self)
 
907
            return super(IPv6_TCPServer, self).server_activate()
1479
908
    def enable(self):
1480
909
        self.enabled = True
1481
 
    def add_pipe(self, parent_pipe):
1482
 
        # Call "handle_ipc" for both data and EOF events
1483
 
        gobject.io_add_watch(parent_pipe.fileno(),
1484
 
                             gobject.IO_IN | gobject.IO_HUP,
1485
 
                             functools.partial(self.handle_ipc,
1486
 
                                               parent_pipe = parent_pipe))
1487
 
        
1488
 
    def handle_ipc(self, source, condition, parent_pipe=None,
1489
 
                   client_object=None):
 
910
    def handle_ipc(self, source, condition, file_objects={}):
1490
911
        condition_names = {
1491
 
            gobject.IO_IN: u"IN",   # There is data to read.
1492
 
            gobject.IO_OUT: u"OUT", # Data can be written (without
1493
 
                                    # blocking).
1494
 
            gobject.IO_PRI: u"PRI", # There is urgent data to read.
1495
 
            gobject.IO_ERR: u"ERR", # Error condition.
1496
 
            gobject.IO_HUP: u"HUP"  # Hung up (the connection has been
1497
 
                                    # broken, usually for pipes and
1498
 
                                    # sockets).
 
912
            gobject.IO_IN: "IN", # There is data to read.
 
913
            gobject.IO_OUT: "OUT", # Data can be written (without
 
914
                                   # blocking).
 
915
            gobject.IO_PRI: "PRI", # There is urgent data to read.
 
916
            gobject.IO_ERR: "ERR", # Error condition.
 
917
            gobject.IO_HUP: "HUP"  # Hung up (the connection has been
 
918
                                   # broken, usually for pipes and
 
919
                                   # sockets).
1499
920
            }
1500
921
        conditions_string = ' | '.join(name
1501
922
                                       for cond, name in
1502
923
                                       condition_names.iteritems()
1503
924
                                       if cond & condition)
1504
 
        # error or the other end of multiprocessing.Pipe has closed
1505
 
        if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
 
925
        logger.debug("Handling IPC: FD = %d, condition = %s", source,
 
926
                     conditions_string)
 
927
        
 
928
        # Turn the pipe file descriptor into a Python file object
 
929
        if source not in file_objects:
 
930
            file_objects[source] = os.fdopen(source, "r", 1)
 
931
        
 
932
        # Read a line from the file object
 
933
        cmdline = file_objects[source].readline()
 
934
        if not cmdline:             # Empty line means end of file
 
935
            # close the IPC pipe
 
936
            file_objects[source].close()
 
937
            del file_objects[source]
 
938
            
 
939
            # Stop calling this function
1506
940
            return False
1507
941
        
1508
 
        # Read a request from the child
1509
 
        request = parent_pipe.recv()
1510
 
        command = request[0]
 
942
        logger.debug("IPC command: %r\n" % cmdline)
1511
943
        
1512
 
        if command == 'init':
1513
 
            fpr = request[1]
1514
 
            address = request[2]
1515
 
            
1516
 
            for c in self.clients:
1517
 
                if c.fingerprint == fpr:
1518
 
                    client = c
 
944
        # Parse and act on command
 
945
        cmd, args = cmdline.split(None, 1)
 
946
        if cmd == "NOTFOUND":
 
947
            if self.settings["use_dbus"]:
 
948
                # Emit D-Bus signal
 
949
                mandos_dbus_service.ClientNotFound(args)
 
950
        elif cmd == "INVALID":
 
951
            if self.settings["use_dbus"]:
 
952
                for client in self.clients:
 
953
                    if client.name == args:
 
954
                        # Emit D-Bus signal
 
955
                        client.Rejected()
 
956
                        break
 
957
        elif cmd == "SENDING":
 
958
            for client in self.clients:
 
959
                if client.name == args:
 
960
                    client.checked_ok()
 
961
                    if self.settings["use_dbus"]:
 
962
                        # Emit D-Bus signal
 
963
                        client.ReceivedSecret()
1519
964
                    break
1520
 
            else:
1521
 
                logger.warning(u"Client not found for fingerprint: %s, ad"
1522
 
                               u"dress: %s", fpr, address)
1523
 
                if self.use_dbus:
1524
 
                    # Emit D-Bus signal
1525
 
                    mandos_dbus_service.ClientNotFound(fpr, address[0])
1526
 
                parent_pipe.send(False)
1527
 
                return False
1528
 
            
1529
 
            gobject.io_add_watch(parent_pipe.fileno(),
1530
 
                                 gobject.IO_IN | gobject.IO_HUP,
1531
 
                                 functools.partial(self.handle_ipc,
1532
 
                                                   parent_pipe = parent_pipe,
1533
 
                                                   client_object = client))
1534
 
            parent_pipe.send(True)
1535
 
            # remove the old hook in favor of the new above hook on same fileno
1536
 
            return False
1537
 
        if command == 'funcall':
1538
 
            funcname = request[1]
1539
 
            args = request[2]
1540
 
            kwargs = request[3]
1541
 
            
1542
 
            parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1543
 
 
1544
 
        if command == 'getattr':
1545
 
            attrname = request[1]
1546
 
            if callable(client_object.__getattribute__(attrname)):
1547
 
                parent_pipe.send(('function',))
1548
 
            else:
1549
 
                parent_pipe.send(('data', client_object.__getattribute__(attrname)))
 
965
        else:
 
966
            logger.error("Unknown IPC command: %r", cmdline)
1550
967
        
1551
 
        if command == 'setattr':
1552
 
            attrname = request[1]
1553
 
            value = request[2]
1554
 
            setattr(client_object, attrname, value)
1555
 
 
 
968
        # Keep calling this function
1556
969
        return True
1557
970
 
1558
971
 
1559
972
def string_to_delta(interval):
1560
973
    """Parse a string and return a datetime.timedelta
1561
974
    
1562
 
    >>> string_to_delta(u'7d')
 
975
    >>> string_to_delta('7d')
1563
976
    datetime.timedelta(7)
1564
 
    >>> string_to_delta(u'60s')
 
977
    >>> string_to_delta('60s')
1565
978
    datetime.timedelta(0, 60)
1566
 
    >>> string_to_delta(u'60m')
 
979
    >>> string_to_delta('60m')
1567
980
    datetime.timedelta(0, 3600)
1568
 
    >>> string_to_delta(u'24h')
 
981
    >>> string_to_delta('24h')
1569
982
    datetime.timedelta(1)
1570
983
    >>> string_to_delta(u'1w')
1571
984
    datetime.timedelta(7)
1572
 
    >>> string_to_delta(u'5m 30s')
 
985
    >>> string_to_delta('5m 30s')
1573
986
    datetime.timedelta(0, 330)
1574
987
    """
1575
988
    timevalue = datetime.timedelta(0)
1588
1001
            elif suffix == u"w":
1589
1002
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1590
1003
            else:
1591
 
                raise ValueError(u"Unknown suffix %r" % suffix)
1592
 
        except (ValueError, IndexError), e:
1593
 
            raise ValueError(e.message)
 
1004
                raise ValueError
 
1005
        except (ValueError, IndexError):
 
1006
            raise ValueError
1594
1007
        timevalue += delta
1595
1008
    return timevalue
1596
1009
 
1597
1010
 
 
1011
def server_state_changed(state):
 
1012
    """Derived from the Avahi example code"""
 
1013
    if state == avahi.SERVER_COLLISION:
 
1014
        logger.error(u"Zeroconf server name collision")
 
1015
        service.remove()
 
1016
    elif state == avahi.SERVER_RUNNING:
 
1017
        service.add()
 
1018
 
 
1019
 
 
1020
def entry_group_state_changed(state, error):
 
1021
    """Derived from the Avahi example code"""
 
1022
    logger.debug(u"Avahi state change: %i", state)
 
1023
    
 
1024
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
1025
        logger.debug(u"Zeroconf service established.")
 
1026
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
1027
        logger.warning(u"Zeroconf service name collision.")
 
1028
        service.rename()
 
1029
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
1030
        logger.critical(u"Avahi: Error in group state changed %s",
 
1031
                        unicode(error))
 
1032
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
 
1033
 
1598
1034
def if_nametoindex(interface):
1599
 
    """Call the C function if_nametoindex(), or equivalent
1600
 
    
1601
 
    Note: This function cannot accept a unicode string."""
 
1035
    """Call the C function if_nametoindex(), or equivalent"""
1602
1036
    global if_nametoindex
1603
1037
    try:
1604
1038
        if_nametoindex = (ctypes.cdll.LoadLibrary
1605
 
                          (ctypes.util.find_library(u"c"))
 
1039
                          (ctypes.util.find_library("c"))
1606
1040
                          .if_nametoindex)
1607
1041
    except (OSError, AttributeError):
1608
 
        logger.warning(u"Doing if_nametoindex the hard way")
 
1042
        if "struct" not in sys.modules:
 
1043
            import struct
 
1044
        if "fcntl" not in sys.modules:
 
1045
            import fcntl
1609
1046
        def if_nametoindex(interface):
1610
1047
            "Get an interface index the hard way, i.e. using fcntl()"
1611
1048
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1612
 
            with contextlib.closing(socket.socket()) as s:
 
1049
            with closing(socket.socket()) as s:
1613
1050
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1614
 
                                    struct.pack(str(u"16s16x"),
1615
 
                                                interface))
1616
 
            interface_index = struct.unpack(str(u"I"),
1617
 
                                            ifreq[16:20])[0]
 
1051
                                    struct.pack("16s16x", interface))
 
1052
            interface_index = struct.unpack("I", ifreq[16:20])[0]
1618
1053
            return interface_index
1619
1054
    return if_nametoindex(interface)
1620
1055
 
1621
1056
 
1622
1057
def daemon(nochdir = False, noclose = False):
1623
1058
    """See daemon(3).  Standard BSD Unix function.
1624
 
    
1625
1059
    This should really exist as os.daemon, but it doesn't (yet)."""
1626
1060
    if os.fork():
1627
1061
        sys.exit()
1628
1062
    os.setsid()
1629
1063
    if not nochdir:
1630
 
        os.chdir(u"/")
 
1064
        os.chdir("/")
1631
1065
    if os.fork():
1632
1066
        sys.exit()
1633
1067
    if not noclose:
1635
1069
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1636
1070
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1637
1071
            raise OSError(errno.ENODEV,
1638
 
                          u"%s not a character device"
1639
 
                          % os.path.devnull)
 
1072
                          "/dev/null not a character device")
1640
1073
        os.dup2(null, sys.stdin.fileno())
1641
1074
        os.dup2(null, sys.stdout.fileno())
1642
1075
        os.dup2(null, sys.stderr.fileno())
1646
1079
 
1647
1080
def main():
1648
1081
    
1649
 
    ##################################################################
 
1082
    ######################################################################
1650
1083
    # Parsing of options, both command line and config file
1651
1084
    
1652
1085
    parser = optparse.OptionParser(version = "%%prog %s" % version)
1653
 
    parser.add_option("-i", u"--interface", type=u"string",
1654
 
                      metavar="IF", help=u"Bind to interface IF")
1655
 
    parser.add_option("-a", u"--address", type=u"string",
1656
 
                      help=u"Address to listen for requests on")
1657
 
    parser.add_option("-p", u"--port", type=u"int",
1658
 
                      help=u"Port number to receive requests on")
1659
 
    parser.add_option("--check", action=u"store_true",
1660
 
                      help=u"Run self-test")
1661
 
    parser.add_option("--debug", action=u"store_true",
1662
 
                      help=u"Debug mode; run in foreground and log to"
1663
 
                      u" terminal")
1664
 
    parser.add_option("--debuglevel", type=u"string", metavar="Level",
1665
 
                      help=u"Debug level for stdout output")
1666
 
    parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1667
 
                      u" priority string (see GnuTLS documentation)")
1668
 
    parser.add_option("--servicename", type=u"string",
1669
 
                      metavar=u"NAME", help=u"Zeroconf service name")
1670
 
    parser.add_option("--configdir", type=u"string",
1671
 
                      default=u"/etc/mandos", metavar=u"DIR",
1672
 
                      help=u"Directory to search for configuration"
1673
 
                      u" files")
1674
 
    parser.add_option("--no-dbus", action=u"store_false",
1675
 
                      dest=u"use_dbus", help=u"Do not provide D-Bus"
1676
 
                      u" system bus interface")
1677
 
    parser.add_option("--no-ipv6", action=u"store_false",
1678
 
                      dest=u"use_ipv6", help=u"Do not use IPv6")
 
1086
    parser.add_option("-i", "--interface", type="string",
 
1087
                      metavar="IF", help="Bind to interface IF")
 
1088
    parser.add_option("-a", "--address", type="string",
 
1089
                      help="Address to listen for requests on")
 
1090
    parser.add_option("-p", "--port", type="int",
 
1091
                      help="Port number to receive requests on")
 
1092
    parser.add_option("--check", action="store_true",
 
1093
                      help="Run self-test")
 
1094
    parser.add_option("--debug", action="store_true",
 
1095
                      help="Debug mode; run in foreground and log to"
 
1096
                      " terminal")
 
1097
    parser.add_option("--priority", type="string", help="GnuTLS"
 
1098
                      " priority string (see GnuTLS documentation)")
 
1099
    parser.add_option("--servicename", type="string", metavar="NAME",
 
1100
                      help="Zeroconf service name")
 
1101
    parser.add_option("--configdir", type="string",
 
1102
                      default="/etc/mandos", metavar="DIR",
 
1103
                      help="Directory to search for configuration"
 
1104
                      " files")
 
1105
    parser.add_option("--no-dbus", action="store_false",
 
1106
                      dest="use_dbus",
 
1107
                      help="Do not provide D-Bus system bus"
 
1108
                      " interface")
 
1109
    parser.add_option("--no-ipv6", action="store_false",
 
1110
                      dest="use_ipv6", help="Do not use IPv6")
1679
1111
    options = parser.parse_args()[0]
1680
1112
    
1681
1113
    if options.check:
1684
1116
        sys.exit()
1685
1117
    
1686
1118
    # Default values for config file for server-global settings
1687
 
    server_defaults = { u"interface": u"",
1688
 
                        u"address": u"",
1689
 
                        u"port": u"",
1690
 
                        u"debug": u"False",
1691
 
                        u"priority":
1692
 
                        u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1693
 
                        u"servicename": u"Mandos",
1694
 
                        u"use_dbus": u"True",
1695
 
                        u"use_ipv6": u"True",
1696
 
                        u"debuglevel": u"",
 
1119
    server_defaults = { "interface": "",
 
1120
                        "address": "",
 
1121
                        "port": "",
 
1122
                        "debug": "False",
 
1123
                        "priority":
 
1124
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
 
1125
                        "servicename": "Mandos",
 
1126
                        "use_dbus": "True",
 
1127
                        "use_ipv6": "True",
1697
1128
                        }
1698
1129
    
1699
1130
    # Parse config file for server-global settings
1700
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
1131
    server_config = ConfigParser.SafeConfigParser(server_defaults)
1701
1132
    del server_defaults
1702
 
    server_config.read(os.path.join(options.configdir,
1703
 
                                    u"mandos.conf"))
 
1133
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
1704
1134
    # Convert the SafeConfigParser object to a dict
1705
1135
    server_settings = server_config.defaults()
1706
1136
    # Use the appropriate methods on the non-string config options
1707
 
    for option in (u"debug", u"use_dbus", u"use_ipv6"):
1708
 
        server_settings[option] = server_config.getboolean(u"DEFAULT",
1709
 
                                                           option)
 
1137
    server_settings["debug"] = server_config.getboolean("DEFAULT",
 
1138
                                                        "debug")
 
1139
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
 
1140
                                                           "use_dbus")
 
1141
    server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
 
1142
                                                           "use_ipv6")
1710
1143
    if server_settings["port"]:
1711
 
        server_settings["port"] = server_config.getint(u"DEFAULT",
1712
 
                                                       u"port")
 
1144
        server_settings["port"] = server_config.getint("DEFAULT",
 
1145
                                                       "port")
1713
1146
    del server_config
1714
1147
    
1715
1148
    # Override the settings from the config file with command line
1716
1149
    # options, if set.
1717
 
    for option in (u"interface", u"address", u"port", u"debug",
1718
 
                   u"priority", u"servicename", u"configdir",
1719
 
                   u"use_dbus", u"use_ipv6", u"debuglevel"):
 
1150
    for option in ("interface", "address", "port", "debug",
 
1151
                   "priority", "servicename", "configdir",
 
1152
                   "use_dbus", "use_ipv6"):
1720
1153
        value = getattr(options, option)
1721
1154
        if value is not None:
1722
1155
            server_settings[option] = value
1723
1156
    del options
1724
 
    # Force all strings to be unicode
1725
 
    for option in server_settings.keys():
1726
 
        if type(server_settings[option]) is str:
1727
 
            server_settings[option] = unicode(server_settings[option])
1728
1157
    # Now we have our good server settings in "server_settings"
1729
1158
    
1730
1159
    ##################################################################
1731
1160
    
1732
1161
    # For convenience
1733
 
    debug = server_settings[u"debug"]
1734
 
    debuglevel = server_settings[u"debuglevel"]
1735
 
    use_dbus = server_settings[u"use_dbus"]
1736
 
    use_ipv6 = server_settings[u"use_ipv6"]
1737
 
 
1738
 
    if server_settings[u"servicename"] != u"Mandos":
 
1162
    debug = server_settings["debug"]
 
1163
    use_dbus = server_settings["use_dbus"]
 
1164
    use_ipv6 = server_settings["use_ipv6"]
 
1165
    
 
1166
    if not debug:
 
1167
        syslogger.setLevel(logging.WARNING)
 
1168
        console.setLevel(logging.WARNING)
 
1169
    
 
1170
    if server_settings["servicename"] != "Mandos":
1739
1171
        syslogger.setFormatter(logging.Formatter
1740
 
                               (u'Mandos (%s) [%%(process)d]:'
1741
 
                                u' %%(levelname)s: %%(message)s'
1742
 
                                % server_settings[u"servicename"]))
 
1172
                               ('Mandos (%s) [%%(process)d]:'
 
1173
                                ' %%(levelname)s: %%(message)s'
 
1174
                                % server_settings["servicename"]))
1743
1175
    
1744
1176
    # Parse config file with clients
1745
 
    client_defaults = { u"timeout": u"1h",
1746
 
                        u"interval": u"5m",
1747
 
                        u"checker": u"fping -q -- %%(host)s",
1748
 
                        u"host": u"",
1749
 
                        u"approval_delay": u"0s",
1750
 
                        u"approval_duration": u"1s",
 
1177
    client_defaults = { "timeout": "1h",
 
1178
                        "interval": "5m",
 
1179
                        "checker": "fping -q -- %%(host)s",
 
1180
                        "host": "",
1751
1181
                        }
1752
 
    client_config = configparser.SafeConfigParser(client_defaults)
1753
 
    client_config.read(os.path.join(server_settings[u"configdir"],
1754
 
                                    u"clients.conf"))
1755
 
    
 
1182
    client_config = ConfigParser.SafeConfigParser(client_defaults)
 
1183
    client_config.read(os.path.join(server_settings["configdir"],
 
1184
                                    "clients.conf"))
 
1185
 
1756
1186
    global mandos_dbus_service
1757
1187
    mandos_dbus_service = None
1758
1188
    
1759
 
    tcp_server = MandosServer((server_settings[u"address"],
1760
 
                               server_settings[u"port"]),
1761
 
                              ClientHandler,
1762
 
                              interface=(server_settings[u"interface"]
1763
 
                                         or None),
1764
 
                              use_ipv6=use_ipv6,
1765
 
                              gnutls_priority=
1766
 
                              server_settings[u"priority"],
1767
 
                              use_dbus=use_dbus)
1768
 
    if not debug:
1769
 
        pidfilename = u"/var/run/mandos.pid"
1770
 
        try:
1771
 
            pidfile = open(pidfilename, u"w")
1772
 
        except IOError:
1773
 
            logger.error(u"Could not open file %r", pidfilename)
 
1189
    clients = Set()
 
1190
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
1191
                                 server_settings["port"]),
 
1192
                                TCP_handler,
 
1193
                                settings=server_settings,
 
1194
                                clients=clients, use_ipv6=use_ipv6)
 
1195
    pidfilename = "/var/run/mandos.pid"
 
1196
    try:
 
1197
        pidfile = open(pidfilename, "w")
 
1198
    except IOError:
 
1199
        logger.error("Could not open file %r", pidfilename)
1774
1200
    
1775
1201
    try:
1776
 
        uid = pwd.getpwnam(u"_mandos").pw_uid
1777
 
        gid = pwd.getpwnam(u"_mandos").pw_gid
 
1202
        uid = pwd.getpwnam("_mandos").pw_uid
 
1203
        gid = pwd.getpwnam("_mandos").pw_gid
1778
1204
    except KeyError:
1779
1205
        try:
1780
 
            uid = pwd.getpwnam(u"mandos").pw_uid
1781
 
            gid = pwd.getpwnam(u"mandos").pw_gid
 
1206
            uid = pwd.getpwnam("mandos").pw_uid
 
1207
            gid = pwd.getpwnam("mandos").pw_gid
1782
1208
        except KeyError:
1783
1209
            try:
1784
 
                uid = pwd.getpwnam(u"nobody").pw_uid
1785
 
                gid = pwd.getpwnam(u"nobody").pw_gid
 
1210
                uid = pwd.getpwnam("nobody").pw_uid
 
1211
                gid = pwd.getpwnam("nogroup").pw_gid
1786
1212
            except KeyError:
1787
1213
                uid = 65534
1788
1214
                gid = 65534
1793
1219
        if error[0] != errno.EPERM:
1794
1220
            raise error
1795
1221
    
1796
 
    if not debug and not debuglevel:
1797
 
        syslogger.setLevel(logging.WARNING)
1798
 
        console.setLevel(logging.WARNING)
1799
 
    if debuglevel:
1800
 
        level = getattr(logging, debuglevel.upper())
1801
 
        syslogger.setLevel(level)
1802
 
        console.setLevel(level)
1803
 
 
 
1222
    # Enable all possible GnuTLS debugging
1804
1223
    if debug:
1805
 
        # Enable all possible GnuTLS debugging
1806
 
        
1807
1224
        # "Use a log level over 10 to enable all debugging options."
1808
1225
        # - GnuTLS manual
1809
1226
        gnutls.library.functions.gnutls_global_set_log_level(11)
1810
1227
        
1811
1228
        @gnutls.library.types.gnutls_log_func
1812
1229
        def debug_gnutls(level, string):
1813
 
            logger.debug(u"GnuTLS: %s", string[:-1])
 
1230
            logger.debug("GnuTLS: %s", string[:-1])
1814
1231
        
1815
1232
        (gnutls.library.functions
1816
1233
         .gnutls_global_set_log_function(debug_gnutls))
1817
 
        
1818
 
        # Redirect stdin so all checkers get /dev/null
1819
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1820
 
        os.dup2(null, sys.stdin.fileno())
1821
 
        if null > 2:
1822
 
            os.close(null)
1823
 
    else:
1824
 
        # No console logging
1825
 
        logger.removeHandler(console)
1826
1234
    
 
1235
    global service
 
1236
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
 
1237
    service = AvahiService(name = server_settings["servicename"],
 
1238
                           servicetype = "_mandos._tcp",
 
1239
                           protocol = protocol)
 
1240
    if server_settings["interface"]:
 
1241
        service.interface = (if_nametoindex
 
1242
                             (server_settings["interface"]))
1827
1243
    
1828
1244
    global main_loop
 
1245
    global bus
 
1246
    global server
1829
1247
    # From the Avahi example code
1830
1248
    DBusGMainLoop(set_as_default=True )
1831
1249
    main_loop = gobject.MainLoop()
1832
1250
    bus = dbus.SystemBus()
 
1251
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
1252
                                           avahi.DBUS_PATH_SERVER),
 
1253
                            avahi.DBUS_INTERFACE_SERVER)
1833
1254
    # End of Avahi example code
1834
1255
    if use_dbus:
1835
 
        try:
1836
 
            bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1837
 
                                            bus, do_not_queue=True)
1838
 
        except dbus.exceptions.NameExistsException, e:
1839
 
            logger.error(unicode(e) + u", disabling D-Bus")
1840
 
            use_dbus = False
1841
 
            server_settings[u"use_dbus"] = False
1842
 
            tcp_server.use_dbus = False
1843
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1844
 
    service = AvahiService(name = server_settings[u"servicename"],
1845
 
                           servicetype = u"_mandos._tcp",
1846
 
                           protocol = protocol, bus = bus)
1847
 
    if server_settings["interface"]:
1848
 
        service.interface = (if_nametoindex
1849
 
                             (str(server_settings[u"interface"])))
1850
 
 
1851
 
    if not debug:
1852
 
        # Close all input and output, do double fork, etc.
1853
 
        daemon()
1854
 
        
1855
 
    global multiprocessing_manager
1856
 
    multiprocessing_manager = multiprocessing.Manager()
 
1256
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1857
1257
    
1858
1258
    client_class = Client
1859
1259
    if use_dbus:
1860
 
        client_class = functools.partial(ClientDBus, bus = bus)
1861
 
    def client_config_items(config, section):
1862
 
        special_settings = {
1863
 
            "approved_by_default":
1864
 
                lambda: config.getboolean(section,
1865
 
                                          "approved_by_default"),
1866
 
            }
1867
 
        for name, value in config.items(section):
1868
 
            try:
1869
 
                yield (name, special_settings[name]())
1870
 
            except KeyError:
1871
 
                yield (name, value)
1872
 
    
1873
 
    tcp_server.clients.update(set(
 
1260
        client_class = ClientDBus
 
1261
    clients.update(Set(
1874
1262
            client_class(name = section,
1875
 
                         config= dict(client_config_items(
1876
 
                        client_config, section)))
 
1263
                         config= dict(client_config.items(section)))
1877
1264
            for section in client_config.sections()))
1878
 
    if not tcp_server.clients:
 
1265
    if not clients:
1879
1266
        logger.warning(u"No clients defined")
 
1267
    
 
1268
    if debug:
 
1269
        # Redirect stdin so all checkers get /dev/null
 
1270
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
1271
        os.dup2(null, sys.stdin.fileno())
 
1272
        if null > 2:
 
1273
            os.close(null)
 
1274
    else:
 
1275
        # No console logging
 
1276
        logger.removeHandler(console)
 
1277
        # Close all input and output, do double fork, etc.
 
1278
        daemon()
 
1279
    
 
1280
    try:
 
1281
        with closing(pidfile):
 
1282
            pid = os.getpid()
 
1283
            pidfile.write(str(pid) + "\n")
 
1284
        del pidfile
 
1285
    except IOError:
 
1286
        logger.error(u"Could not write to file %r with PID %d",
 
1287
                     pidfilename, pid)
 
1288
    except NameError:
 
1289
        # "pidfile" was never created
 
1290
        pass
 
1291
    del pidfilename
 
1292
    
 
1293
    def cleanup():
 
1294
        "Cleanup function; run on exit"
 
1295
        global group
 
1296
        # From the Avahi example code
 
1297
        if not group is None:
 
1298
            group.Free()
 
1299
            group = None
 
1300
        # End of Avahi example code
1880
1301
        
 
1302
        while clients:
 
1303
            client = clients.pop()
 
1304
            client.disable_hook = None
 
1305
            client.disable()
 
1306
    
 
1307
    atexit.register(cleanup)
 
1308
    
1881
1309
    if not debug:
1882
 
        try:
1883
 
            with pidfile:
1884
 
                pid = os.getpid()
1885
 
                pidfile.write(str(pid) + "\n")
1886
 
            del pidfile
1887
 
        except IOError:
1888
 
            logger.error(u"Could not write to file %r with PID %d",
1889
 
                         pidfilename, pid)
1890
 
        except NameError:
1891
 
            # "pidfile" was never created
1892
 
            pass
1893
 
        del pidfilename
1894
 
        
1895
1310
        signal.signal(signal.SIGINT, signal.SIG_IGN)
1896
 
 
1897
1311
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1898
1312
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1899
1313
    
1901
1315
        class MandosDBusService(dbus.service.Object):
1902
1316
            """A D-Bus proxy object"""
1903
1317
            def __init__(self):
1904
 
                dbus.service.Object.__init__(self, bus, u"/")
 
1318
                dbus.service.Object.__init__(self, bus, "/")
1905
1319
            _interface = u"se.bsnet.fukt.Mandos"
1906
1320
            
1907
 
            @dbus.service.signal(_interface, signature=u"o")
1908
 
            def ClientAdded(self, objpath):
1909
 
                "D-Bus signal"
1910
 
                pass
1911
 
            
1912
 
            @dbus.service.signal(_interface, signature=u"ss")
1913
 
            def ClientNotFound(self, fingerprint, address):
1914
 
                "D-Bus signal"
1915
 
                pass
1916
 
            
1917
 
            @dbus.service.signal(_interface, signature=u"os")
 
1321
            @dbus.service.signal(_interface, signature="oa{sv}")
 
1322
            def ClientAdded(self, objpath, properties):
 
1323
                "D-Bus signal"
 
1324
                pass
 
1325
            
 
1326
            @dbus.service.signal(_interface, signature="s")
 
1327
            def ClientNotFound(self, fingerprint):
 
1328
                "D-Bus signal"
 
1329
                pass
 
1330
            
 
1331
            @dbus.service.signal(_interface, signature="os")
1918
1332
            def ClientRemoved(self, objpath, name):
1919
1333
                "D-Bus signal"
1920
1334
                pass
1921
1335
            
1922
 
            @dbus.service.method(_interface, out_signature=u"ao")
 
1336
            @dbus.service.method(_interface, out_signature="ao")
1923
1337
            def GetAllClients(self):
1924
1338
                "D-Bus method"
1925
 
                return dbus.Array(c.dbus_object_path
1926
 
                                  for c in tcp_server.clients)
 
1339
                return dbus.Array(c.dbus_object_path for c in clients)
1927
1340
            
1928
 
            @dbus.service.method(_interface,
1929
 
                                 out_signature=u"a{oa{sv}}")
 
1341
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
1930
1342
            def GetAllClientsWithProperties(self):
1931
1343
                "D-Bus method"
1932
1344
                return dbus.Dictionary(
1933
 
                    ((c.dbus_object_path, c.GetAll(u""))
1934
 
                     for c in tcp_server.clients),
1935
 
                    signature=u"oa{sv}")
 
1345
                    ((c.dbus_object_path, c.GetAllProperties())
 
1346
                     for c in clients),
 
1347
                    signature="oa{sv}")
1936
1348
            
1937
 
            @dbus.service.method(_interface, in_signature=u"o")
 
1349
            @dbus.service.method(_interface, in_signature="o")
1938
1350
            def RemoveClient(self, object_path):
1939
1351
                "D-Bus method"
1940
 
                for c in tcp_server.clients:
 
1352
                for c in clients:
1941
1353
                    if c.dbus_object_path == object_path:
1942
 
                        tcp_server.clients.remove(c)
 
1354
                        clients.remove(c)
1943
1355
                        c.remove_from_connection()
1944
1356
                        # Don't signal anything except ClientRemoved
1945
 
                        c.disable(quiet=True)
 
1357
                        c.disable(signal=False)
1946
1358
                        # Emit D-Bus signal
1947
1359
                        self.ClientRemoved(object_path, c.name)
1948
1360
                        return
1949
 
                raise KeyError(object_path)
 
1361
                raise KeyError
1950
1362
            
1951
1363
            del _interface
1952
1364
        
1953
1365
        mandos_dbus_service = MandosDBusService()
1954
1366
    
1955
 
    def cleanup():
1956
 
        "Cleanup function; run on exit"
1957
 
        service.cleanup()
1958
 
        
1959
 
        while tcp_server.clients:
1960
 
            client = tcp_server.clients.pop()
1961
 
            if use_dbus:
1962
 
                client.remove_from_connection()
1963
 
            client.disable_hook = None
1964
 
            # Don't signal anything except ClientRemoved
1965
 
            client.disable(quiet=True)
1966
 
            if use_dbus:
1967
 
                # Emit D-Bus signal
1968
 
                mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1969
 
                                                  client.name)
1970
 
    
1971
 
    atexit.register(cleanup)
1972
 
    
1973
 
    for client in tcp_server.clients:
 
1367
    for client in clients:
1974
1368
        if use_dbus:
1975
1369
            # Emit D-Bus signal
1976
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
 
1370
            mandos_dbus_service.ClientAdded(client.dbus_object_path,
 
1371
                                            client.GetAllProperties())
1977
1372
        client.enable()
1978
1373
    
1979
1374
    tcp_server.enable()
1993
1388
    
1994
1389
    try:
1995
1390
        # From the Avahi example code
 
1391
        server.connect_to_signal("StateChanged", server_state_changed)
1996
1392
        try:
1997
 
            service.activate()
 
1393
            server_state_changed(server.GetState())
1998
1394
        except dbus.exceptions.DBusException, error:
1999
1395
            logger.critical(u"DBusException: %s", error)
2000
 
            cleanup()
2001
1396
            sys.exit(1)
2002
1397
        # End of Avahi example code
2003
1398
        
2010
1405
        main_loop.run()
2011
1406
    except AvahiError, error:
2012
1407
        logger.critical(u"AvahiError: %s", error)
2013
 
        cleanup()
2014
1408
        sys.exit(1)
2015
1409
    except KeyboardInterrupt:
2016
1410
        if debug:
2017
1411
            print >> sys.stderr
2018
 
        logger.debug(u"Server received KeyboardInterrupt")
2019
 
    logger.debug(u"Server exiting")
2020
 
    # Must run before the D-Bus bus name gets deregistered
2021
 
    cleanup()
 
1412
        logger.debug("Server received KeyboardInterrupt")
 
1413
    logger.debug("Server exiting")
2022
1414
 
2023
1415
if __name__ == '__main__':
2024
1416
    main()