/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2008-09-01 08:29:23 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080901082923-i2liq6t7warmu9xe
* mandos.xml: Enclose "RAM" with <acronym>.
* overview.xml: - '' -

* plugin-runner.xml (DESCRIPTION): Improved wording.
  (PURPOSE): New section.
  (OPTIONS): Improved wording.
  (OVERVIEW, PLUGINS): New section.
  (FALLBACK): New empty placeholder section.

* plugins.d/password-prompt.xml: Enclose "RAM" with <acronym>.

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Lines of Context:
mandos
11
11
# and some lines in "main".
12
12
# 
13
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# Everything else is
14
 
# Copyright © 2008,2009 Teddy Hogeborn
15
 
# Copyright © 2008,2009 Björn Påhlsson
 
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
# 
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
31
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
# 
33
32
 
34
 
from __future__ import division, with_statement, absolute_import
 
33
from __future__ import division
35
34
 
36
35
import SocketServer
37
36
import socket
38
 
import optparse
 
37
import select
 
38
from optparse import OptionParser
39
39
import datetime
40
40
import errno
41
41
import gnutls.crypto
55
55
import stat
56
56
import logging
57
57
import logging.handlers
58
 
import pwd
59
 
from contextlib import closing
60
58
 
61
59
import dbus
62
 
import dbus.service
63
60
import gobject
64
61
import avahi
65
62
from dbus.mainloop.glib import DBusGMainLoop
66
63
import ctypes
67
 
import ctypes.util
68
64
 
69
 
version = "1.0.8"
 
65
version = "1.0"
70
66
 
71
67
logger = logging.Logger('mandos')
72
 
syslogger = (logging.handlers.SysLogHandler
73
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
 
              address = "/dev/log"))
75
 
syslogger.setFormatter(logging.Formatter
76
 
                       ('Mandos [%(process)d]: %(levelname)s:'
77
 
                        ' %(message)s'))
 
68
syslogger = logging.handlers.SysLogHandler\
 
69
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
70
             address = "/dev/log")
 
71
syslogger.setFormatter(logging.Formatter\
 
72
                        ('Mandos: %(levelname)s: %(message)s'))
78
73
logger.addHandler(syslogger)
79
74
 
80
75
console = logging.StreamHandler()
81
 
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
 
                                       ' %(levelname)s: %(message)s'))
 
76
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
 
77
                                       ' %(message)s'))
83
78
logger.addHandler(console)
84
79
 
85
80
class AvahiError(Exception):
86
 
    def __init__(self, value, *args, **kwargs):
 
81
    def __init__(self, value):
87
82
        self.value = value
88
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
89
 
    def __unicode__(self):
90
 
        return unicode(repr(self.value))
 
83
    def __str__(self):
 
84
        return repr(self.value)
91
85
 
92
86
class AvahiServiceError(AvahiError):
93
87
    pass
113
107
                  a sensible number of times
114
108
    """
115
109
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
 
                 servicetype = None, port = None, TXT = None,
117
 
                 domain = "", host = "", max_renames = 32768,
118
 
                 protocol = avahi.PROTO_UNSPEC):
 
110
                 type = None, port = None, TXT = None, domain = "",
 
111
                 host = "", max_renames = 32768):
119
112
        self.interface = interface
120
113
        self.name = name
121
 
        self.type = servicetype
 
114
        self.type = type
122
115
        self.port = port
123
 
        self.TXT = TXT if TXT is not None else []
 
116
        if TXT is None:
 
117
            self.TXT = []
 
118
        else:
 
119
            self.TXT = TXT
124
120
        self.domain = domain
125
121
        self.host = host
126
122
        self.rename_count = 0
127
123
        self.max_renames = max_renames
128
 
        self.protocol = protocol
129
124
    def rename(self):
130
125
        """Derived from the Avahi example code"""
131
126
        if self.rename_count >= self.max_renames:
132
127
            logger.critical(u"No suitable Zeroconf service name found"
133
128
                            u" after %i retries, exiting.",
134
 
                            self.rename_count)
135
 
            raise AvahiServiceError(u"Too many renames")
 
129
                            rename_count)
 
130
            raise AvahiServiceError("Too many renames")
136
131
        self.name = server.GetAlternativeServiceName(self.name)
137
132
        logger.info(u"Changing Zeroconf service name to %r ...",
138
133
                    str(self.name))
139
 
        syslogger.setFormatter(logging.Formatter
140
 
                               ('Mandos (%s) [%%(process)d]:'
141
 
                                ' %%(levelname)s: %%(message)s'
142
 
                                % self.name))
 
134
        syslogger.setFormatter(logging.Formatter\
 
135
                               ('Mandos (%s): %%(levelname)s:'
 
136
                               ' %%(message)s' % self.name))
143
137
        self.remove()
144
138
        self.add()
145
139
        self.rename_count += 1
151
145
        """Derived from the Avahi example code"""
152
146
        global group
153
147
        if group is None:
154
 
            group = dbus.Interface(bus.get_object
155
 
                                   (avahi.DBUS_NAME,
 
148
            group = dbus.Interface\
 
149
                    (bus.get_object(avahi.DBUS_NAME,
156
150
                                    server.EntryGroupNew()),
157
 
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
151
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
158
152
            group.connect_to_signal('StateChanged',
159
153
                                    entry_group_state_changed)
160
154
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
161
155
                     service.name, service.type)
162
156
        group.AddService(
163
157
                self.interface,         # interface
164
 
                self.protocol,          # protocol
 
158
                avahi.PROTO_INET6,      # protocol
165
159
                dbus.UInt32(0),         # flags
166
160
                self.name, self.type,
167
161
                self.domain, self.host,
174
168
# End of Avahi example code
175
169
 
176
170
 
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)
180
 
 
181
 
 
182
171
class Client(object):
183
172
    """A representation of a client host served by this server.
184
173
    Attributes:
185
 
    name:       string; from the config file, used in log messages and
186
 
                        D-Bus identifiers
 
174
    name:      string; from the config file, used in log messages
187
175
    fingerprint: string (40 or 32 hexadecimal digits); used to
188
176
                 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)
199
 
    checker:    subprocess.Popen(); a running checker process used
200
 
                                    to see if the client lives.
201
 
                                    'None' if no process is running.
 
177
    secret:    bytestring; sent verbatim (over TLS) to client
 
178
    host:      string; available for use by the checker command
 
179
    created:   datetime.datetime(); object creation, not client host
 
180
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
181
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
182
                                     until this client is invalid
 
183
    interval:  datetime.timedelta(); How often to start a new checker
 
184
    stop_hook: If set, called by stop() as stop_hook(self)
 
185
    checker:   subprocess.Popen(); a running checker process used
 
186
                                   to see if the client lives.
 
187
                                   'None' if no process is running.
202
188
    checker_initiator_tag: a gobject event source tag, or None
203
 
    disable_initiator_tag:    - '' -
 
189
    stop_initiator_tag:    - '' -
204
190
    checker_callback_tag:  - '' -
205
191
    checker_command: string; External command which is run to check if
206
192
                     client lives.  %() expansions are done at
207
193
                     runtime with vars(self) as dict, so that for
208
194
                     instance %(name)s can be used in the command.
209
 
    current_checker_command: string; current running checker_command
 
195
    Private attibutes:
 
196
    _timeout: Real variable for 'timeout'
 
197
    _interval: Real variable for 'interval'
 
198
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
199
    _interval_milliseconds: - '' -
210
200
    """
211
 
    def timeout_milliseconds(self):
212
 
        "Return the 'timeout' attribute in milliseconds"
213
 
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
214
 
                + (self.timeout.seconds * 1000)
215
 
                + (self.timeout.microseconds // 1000))
216
 
    
217
 
    def interval_milliseconds(self):
218
 
        "Return the 'interval' attribute in milliseconds"
219
 
        return ((self.interval.days * 24 * 60 * 60 * 1000)
220
 
                + (self.interval.seconds * 1000)
221
 
                + (self.interval.microseconds // 1000))
222
 
    
223
 
    def __init__(self, name = None, disable_hook=None, config=None):
 
201
    def _set_timeout(self, timeout):
 
202
        "Setter function for 'timeout' attribute"
 
203
        self._timeout = timeout
 
204
        self._timeout_milliseconds = ((self.timeout.days
 
205
                                       * 24 * 60 * 60 * 1000)
 
206
                                      + (self.timeout.seconds * 1000)
 
207
                                      + (self.timeout.microseconds
 
208
                                         // 1000))
 
209
    timeout = property(lambda self: self._timeout,
 
210
                       _set_timeout)
 
211
    del _set_timeout
 
212
    def _set_interval(self, interval):
 
213
        "Setter function for 'interval' attribute"
 
214
        self._interval = interval
 
215
        self._interval_milliseconds = ((self.interval.days
 
216
                                        * 24 * 60 * 60 * 1000)
 
217
                                       + (self.interval.seconds
 
218
                                          * 1000)
 
219
                                       + (self.interval.microseconds
 
220
                                          // 1000))
 
221
    interval = property(lambda self: self._interval,
 
222
                        _set_interval)
 
223
    del _set_interval
 
224
    def __init__(self, name = None, stop_hook=None, config={}):
224
225
        """Note: the 'checker' key in 'config' sets the
225
226
        'checker_command' attribute and *not* the 'checker'
226
227
        attribute."""
227
228
        self.name = name
228
 
        if config is None:
229
 
            config = {}
230
229
        logger.debug(u"Creating client %r", self.name)
231
230
        # Uppercase and remove spaces from fingerprint for later
232
231
        # comparison purposes with return value from the fingerprint()
233
232
        # function
234
 
        self.fingerprint = (config["fingerprint"].upper()
235
 
                            .replace(u" ", u""))
 
233
        self.fingerprint = config["fingerprint"].upper()\
 
234
                           .replace(u" ", u"")
236
235
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
237
236
        if "secret" in config:
238
237
            self.secret = config["secret"].decode(u"base64")
239
238
        elif "secfile" in config:
240
 
            with closing(open(os.path.expanduser
241
 
                              (os.path.expandvars
242
 
                               (config["secfile"])))) as secfile:
243
 
                self.secret = secfile.read()
 
239
            sf = open(config["secfile"])
 
240
            self.secret = sf.read()
 
241
            sf.close()
244
242
        else:
245
243
            raise TypeError(u"No secret or secfile for client %s"
246
244
                            % self.name)
247
245
        self.host = config.get("host", "")
248
 
        self.created = datetime.datetime.utcnow()
249
 
        self.enabled = False
250
 
        self.last_enabled = None
 
246
        self.created = datetime.datetime.now()
251
247
        self.last_checked_ok = None
252
248
        self.timeout = string_to_delta(config["timeout"])
253
249
        self.interval = string_to_delta(config["interval"])
254
 
        self.disable_hook = disable_hook
 
250
        self.stop_hook = stop_hook
255
251
        self.checker = None
256
252
        self.checker_initiator_tag = None
257
 
        self.disable_initiator_tag = None
 
253
        self.stop_initiator_tag = None
258
254
        self.checker_callback_tag = None
259
 
        self.checker_command = config["checker"]
260
 
        self.current_checker_command = None
261
 
        self.last_connect = None
262
 
    
263
 
    def enable(self):
 
255
        self.check_command = config["checker"]
 
256
    def start(self):
264
257
        """Start this client's checker and timeout hooks"""
265
 
        self.last_enabled = datetime.datetime.utcnow()
266
258
        # Schedule a new checker to be started an 'interval' from now,
267
259
        # and every interval from then on.
268
 
        self.checker_initiator_tag = (gobject.timeout_add
269
 
                                      (self.interval_milliseconds(),
270
 
                                       self.start_checker))
 
260
        self.checker_initiator_tag = gobject.timeout_add\
 
261
                                     (self._interval_milliseconds,
 
262
                                      self.start_checker)
271
263
        # Also start a new checker *right now*.
272
264
        self.start_checker()
273
 
        # Schedule a disable() when 'timeout' has passed
274
 
        self.disable_initiator_tag = (gobject.timeout_add
275
 
                                   (self.timeout_milliseconds(),
276
 
                                    self.disable))
277
 
        self.enabled = True
278
 
    
279
 
    def disable(self):
280
 
        """Disable this client."""
281
 
        if not getattr(self, "enabled", False):
 
265
        # Schedule a stop() when 'timeout' has passed
 
266
        self.stop_initiator_tag = gobject.timeout_add\
 
267
                                  (self._timeout_milliseconds,
 
268
                                   self.stop)
 
269
    def stop(self):
 
270
        """Stop this client.
 
271
        The possibility that a client might be restarted is left open,
 
272
        but not currently used."""
 
273
        # If this client doesn't have a secret, it is already stopped.
 
274
        if hasattr(self, "secret") and self.secret:
 
275
            logger.info(u"Stopping client %s", self.name)
 
276
            self.secret = None
 
277
        else:
282
278
            return False
283
 
        logger.info(u"Disabling client %s", self.name)
284
 
        if getattr(self, "disable_initiator_tag", False):
285
 
            gobject.source_remove(self.disable_initiator_tag)
286
 
            self.disable_initiator_tag = None
 
279
        if getattr(self, "stop_initiator_tag", False):
 
280
            gobject.source_remove(self.stop_initiator_tag)
 
281
            self.stop_initiator_tag = None
287
282
        if getattr(self, "checker_initiator_tag", False):
288
283
            gobject.source_remove(self.checker_initiator_tag)
289
284
            self.checker_initiator_tag = None
290
285
        self.stop_checker()
291
 
        if self.disable_hook:
292
 
            self.disable_hook(self)
293
 
        self.enabled = False
 
286
        if self.stop_hook:
 
287
            self.stop_hook(self)
294
288
        # Do not run this again if called by a gobject.timeout_add
295
289
        return False
296
 
    
297
290
    def __del__(self):
298
 
        self.disable_hook = None
299
 
        self.disable()
300
 
    
301
 
    def checker_callback(self, pid, condition, command):
 
291
        self.stop_hook = None
 
292
        self.stop()
 
293
    def checker_callback(self, pid, condition):
302
294
        """The checker has completed, so take appropriate actions."""
 
295
        now = datetime.datetime.now()
303
296
        self.checker_callback_tag = None
304
297
        self.checker = None
305
 
        if os.WIFEXITED(condition):
306
 
            exitstatus = os.WEXITSTATUS(condition)
307
 
            if exitstatus == 0:
308
 
                logger.info(u"Checker for %(name)s succeeded",
309
 
                            vars(self))
310
 
                self.checked_ok()
311
 
            else:
312
 
                logger.info(u"Checker for %(name)s failed",
313
 
                            vars(self))
314
 
        else:
 
298
        if os.WIFEXITED(condition) \
 
299
               and (os.WEXITSTATUS(condition) == 0):
 
300
            logger.info(u"Checker for %(name)s succeeded",
 
301
                        vars(self))
 
302
            self.last_checked_ok = now
 
303
            gobject.source_remove(self.stop_initiator_tag)
 
304
            self.stop_initiator_tag = gobject.timeout_add\
 
305
                                      (self._timeout_milliseconds,
 
306
                                       self.stop)
 
307
        elif not os.WIFEXITED(condition):
315
308
            logger.warning(u"Checker for %(name)s crashed?",
316
309
                           vars(self))
317
 
    
318
 
    def checked_ok(self):
319
 
        """Bump up the timeout for this client.
320
 
        This should only be called when the client has been seen,
321
 
        alive and well.
322
 
        """
323
 
        self.last_checked_ok = datetime.datetime.utcnow()
324
 
        gobject.source_remove(self.disable_initiator_tag)
325
 
        self.disable_initiator_tag = (gobject.timeout_add
326
 
                                      (self.timeout_milliseconds(),
327
 
                                       self.disable))
328
 
    
 
310
        else:
 
311
            logger.info(u"Checker for %(name)s failed",
 
312
                        vars(self))
329
313
    def start_checker(self):
330
314
        """Start a new checker subprocess if one is not running.
331
315
        If a checker already exists, leave it running and do
338
322
        # checkers alone, the checker would have to take more time
339
323
        # than 'timeout' for the client to be declared invalid, which
340
324
        # is as it should be.
341
 
        
342
 
        # If a checker exists, make sure it is not a zombie
343
 
        if self.checker is not None:
344
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
345
 
            if pid:
346
 
                logger.warning("Checker was a zombie")
347
 
                gobject.source_remove(self.checker_callback_tag)
348
 
                self.checker_callback(pid, status,
349
 
                                      self.current_checker_command)
350
 
        # Start a new checker if needed
351
325
        if self.checker is None:
352
326
            try:
353
 
                # In case checker_command has exactly one % operator
354
 
                command = self.checker_command % self.host
 
327
                # In case check_command has exactly one % operator
 
328
                command = self.check_command % self.host
355
329
            except TypeError:
356
330
                # Escape attributes for the shell
357
331
                escaped_attrs = dict((key, re.escape(str(val)))
358
332
                                     for key, val in
359
333
                                     vars(self).iteritems())
360
334
                try:
361
 
                    command = self.checker_command % escaped_attrs
 
335
                    command = self.check_command % escaped_attrs
362
336
                except TypeError, error:
363
337
                    logger.error(u'Could not format string "%s":'
364
 
                                 u' %s', self.checker_command, error)
 
338
                                 u' %s', self.check_command, error)
365
339
                    return True # Try again later
366
 
            self.current_checker_command = command
367
340
            try:
368
341
                logger.info(u"Starting checker %r for %s",
369
342
                            command, self.name)
374
347
                self.checker = subprocess.Popen(command,
375
348
                                                close_fds=True,
376
349
                                                shell=True, cwd="/")
377
 
                self.checker_callback_tag = (gobject.child_watch_add
378
 
                                             (self.checker.pid,
379
 
                                              self.checker_callback,
380
 
                                              data=command))
381
 
                # The checker may have completed before the gobject
382
 
                # watch was added.  Check for this.
383
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
384
 
                if pid:
385
 
                    gobject.source_remove(self.checker_callback_tag)
386
 
                    self.checker_callback(pid, status, command)
 
350
                self.checker_callback_tag = gobject.child_watch_add\
 
351
                                            (self.checker.pid,
 
352
                                             self.checker_callback)
387
353
            except OSError, error:
388
354
                logger.error(u"Failed to start subprocess: %s",
389
355
                             error)
390
356
        # Re-run this periodically if run by gobject.timeout_add
391
357
        return True
392
 
    
393
358
    def stop_checker(self):
394
359
        """Force the checker process, if any, to stop."""
395
360
        if self.checker_callback_tag:
407
372
            if error.errno != errno.ESRCH: # No such process
408
373
                raise
409
374
        self.checker = None
410
 
    
411
375
    def still_valid(self):
412
376
        """Has the timeout not yet passed for this client?"""
413
 
        if not getattr(self, "enabled", False):
414
 
            return False
415
 
        now = datetime.datetime.utcnow()
 
377
        now = datetime.datetime.now()
416
378
        if self.last_checked_ok is None:
417
379
            return now < (self.created + self.timeout)
418
380
        else:
419
381
            return now < (self.last_checked_ok + self.timeout)
420
382
 
421
383
 
422
 
class ClientDBus(Client, dbus.service.Object):
423
 
    """A Client class using D-Bus
424
 
    Attributes:
425
 
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
426
 
    """
427
 
    # dbus.service.Object doesn't use super(), so we can't either.
428
 
    
429
 
    def __init__(self, *args, **kwargs):
430
 
        Client.__init__(self, *args, **kwargs)
431
 
        # Only now, when this client is initialized, can it show up on
432
 
        # the D-Bus
433
 
        self.dbus_object_path = (dbus.ObjectPath
434
 
                                 ("/clients/"
435
 
                                  + self.name.replace(".", "_")))
436
 
        dbus.service.Object.__init__(self, bus,
437
 
                                     self.dbus_object_path)
438
 
    def enable(self):
439
 
        oldstate = getattr(self, "enabled", False)
440
 
        r = Client.enable(self)
441
 
        if oldstate != self.enabled:
442
 
            # Emit D-Bus signals
443
 
            self.PropertyChanged(dbus.String(u"enabled"),
444
 
                                 dbus.Boolean(True, variant_level=1))
445
 
            self.PropertyChanged(dbus.String(u"last_enabled"),
446
 
                                 (_datetime_to_dbus(self.last_enabled,
447
 
                                                    variant_level=1)))
448
 
        return r
449
 
    
450
 
    def disable(self, signal = True):
451
 
        oldstate = getattr(self, "enabled", False)
452
 
        r = Client.disable(self)
453
 
        if signal and oldstate != self.enabled:
454
 
            # Emit D-Bus signal
455
 
            self.PropertyChanged(dbus.String(u"enabled"),
456
 
                                 dbus.Boolean(False, variant_level=1))
457
 
        return r
458
 
    
459
 
    def __del__(self, *args, **kwargs):
460
 
        try:
461
 
            self.remove_from_connection()
462
 
        except LookupError:
463
 
            pass
464
 
        if hasattr(dbus.service.Object, "__del__"):
465
 
            dbus.service.Object.__del__(self, *args, **kwargs)
466
 
        Client.__del__(self, *args, **kwargs)
467
 
    
468
 
    def checker_callback(self, pid, condition, command,
469
 
                         *args, **kwargs):
470
 
        self.checker_callback_tag = None
471
 
        self.checker = None
472
 
        # Emit D-Bus signal
473
 
        self.PropertyChanged(dbus.String(u"checker_running"),
474
 
                             dbus.Boolean(False, variant_level=1))
475
 
        if os.WIFEXITED(condition):
476
 
            exitstatus = os.WEXITSTATUS(condition)
477
 
            # Emit D-Bus signal
478
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
479
 
                                  dbus.Int64(condition),
480
 
                                  dbus.String(command))
481
 
        else:
482
 
            # Emit D-Bus signal
483
 
            self.CheckerCompleted(dbus.Int16(-1),
484
 
                                  dbus.Int64(condition),
485
 
                                  dbus.String(command))
486
 
        
487
 
        return Client.checker_callback(self, pid, condition, command,
488
 
                                       *args, **kwargs)
489
 
    
490
 
    def checked_ok(self, *args, **kwargs):
491
 
        r = Client.checked_ok(self, *args, **kwargs)
492
 
        # Emit D-Bus signal
493
 
        self.PropertyChanged(
494
 
            dbus.String(u"last_checked_ok"),
495
 
            (_datetime_to_dbus(self.last_checked_ok,
496
 
                               variant_level=1)))
497
 
        return r
498
 
    
499
 
    def start_checker(self, *args, **kwargs):
500
 
        old_checker = self.checker
501
 
        if self.checker is not None:
502
 
            old_checker_pid = self.checker.pid
503
 
        else:
504
 
            old_checker_pid = None
505
 
        r = Client.start_checker(self, *args, **kwargs)
506
 
        # Only if new checker process was started
507
 
        if (self.checker is not None
508
 
            and old_checker_pid != self.checker.pid):
509
 
            # Emit D-Bus signal
510
 
            self.CheckerStarted(self.current_checker_command)
511
 
            self.PropertyChanged(
512
 
                dbus.String("checker_running"),
513
 
                dbus.Boolean(True, variant_level=1))
514
 
        return r
515
 
    
516
 
    def stop_checker(self, *args, **kwargs):
517
 
        old_checker = getattr(self, "checker", None)
518
 
        r = Client.stop_checker(self, *args, **kwargs)
519
 
        if (old_checker is not None
520
 
            and getattr(self, "checker", None) is None):
521
 
            self.PropertyChanged(dbus.String(u"checker_running"),
522
 
                                 dbus.Boolean(False, variant_level=1))
523
 
        return r
524
 
    
525
 
    ## D-Bus methods & signals
526
 
    _interface = u"se.bsnet.fukt.Mandos.Client"
527
 
    
528
 
    # CheckedOK - method
529
 
    CheckedOK = dbus.service.method(_interface)(checked_ok)
530
 
    CheckedOK.__name__ = "CheckedOK"
531
 
    
532
 
    # CheckerCompleted - signal
533
 
    @dbus.service.signal(_interface, signature="nxs")
534
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
535
 
        "D-Bus signal"
536
 
        pass
537
 
    
538
 
    # CheckerStarted - signal
539
 
    @dbus.service.signal(_interface, signature="s")
540
 
    def CheckerStarted(self, command):
541
 
        "D-Bus signal"
542
 
        pass
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
 
    
591
 
    # PropertyChanged - signal
592
 
    @dbus.service.signal(_interface, signature="sv")
593
 
    def PropertyChanged(self, property, value):
594
 
        "D-Bus signal"
595
 
        pass
596
 
    
597
 
    # ReceivedSecret - signal
598
 
    @dbus.service.signal(_interface)
599
 
    def ReceivedSecret(self):
600
 
        "D-Bus signal"
601
 
        pass
602
 
    
603
 
    # Rejected - signal
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)))
652
 
    
653
 
    # Enable - method
654
 
    Enable = dbus.service.method(_interface)(enable)
655
 
    Enable.__name__ = "Enable"
656
 
    
657
 
    # StartChecker - method
658
 
    @dbus.service.method(_interface)
659
 
    def StartChecker(self):
660
 
        "D-Bus method"
661
 
        self.start_checker()
662
 
    
663
 
    # Disable - method
664
 
    @dbus.service.method(_interface)
665
 
    def Disable(self):
666
 
        "D-Bus method"
667
 
        self.disable()
668
 
    
669
 
    # StopChecker - method
670
 
    StopChecker = dbus.service.method(_interface)(stop_checker)
671
 
    StopChecker.__name__ = "StopChecker"
672
 
    
673
 
    del _interface
674
 
 
675
 
 
676
384
def peer_certificate(session):
677
385
    "Return the peer's OpenPGP certificate as a bytestring"
678
386
    # 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):
 
387
    if gnutls.library.functions.gnutls_certificate_type_get\
 
388
            (session._c_object) \
 
389
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
682
390
        # ...do the normal thing
683
391
        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")
 
392
    list_size = ctypes.c_uint()
 
393
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
394
        (session._c_object, ctypes.byref(list_size))
691
395
    if list_size.value == 0:
692
396
        return None
693
397
    cert = cert_list[0]
697
401
def fingerprint(openpgp):
698
402
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
699
403
    # 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))))
 
404
    datum = gnutls.library.types.gnutls_datum_t\
 
405
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
406
                     ctypes.POINTER(ctypes.c_ubyte)),
 
407
         ctypes.c_uint(len(openpgp)))
705
408
    # New empty GnuTLS certificate
706
409
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
707
 
    (gnutls.library.functions
708
 
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
410
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
411
        (ctypes.byref(crt))
709
412
    # 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))
 
413
    gnutls.library.functions.gnutls_openpgp_crt_import\
 
414
                    (crt, ctypes.byref(datum),
 
415
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
714
416
    # 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)))
 
417
    crtverify = ctypes.c_uint();
 
418
    gnutls.library.functions.gnutls_openpgp_crt_verify_self\
 
419
        (crt, 0, ctypes.byref(crtverify))
718
420
    if crtverify.value != 0:
719
421
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
720
422
        raise gnutls.errors.CertificateSecurityError("Verify failed")
721
423
    # New buffer for the fingerprint
722
 
    buf = ctypes.create_string_buffer(20)
723
 
    buf_len = ctypes.c_size_t()
 
424
    buffer = ctypes.create_string_buffer(20)
 
425
    buffer_length = ctypes.c_size_t()
724
426
    # 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)))
 
427
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
428
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
728
429
    # Deinit the certificate
729
430
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
730
431
    # Convert the buffer to a Python bytestring
731
 
    fpr = ctypes.string_at(buf, buf_len.value)
 
432
    fpr = ctypes.string_at(buffer, buffer_length.value)
732
433
    # Convert the bytestring to hexadecimal notation
733
434
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
734
435
    return hex_fpr
735
436
 
736
437
 
737
 
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
438
class tcp_handler(SocketServer.BaseRequestHandler, object):
738
439
    """A TCP request handler class.
739
440
    Instantiated by IPv6_TCPServer for each request to handle it.
740
441
    Note: This will run in its own forked process."""
741
442
    
742
443
    def handle(self):
743
444
        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:
748
 
            session = (gnutls.connection
749
 
                       .ClientSession(self.request,
750
 
                                      gnutls.connection
751
 
                                      .X509Credentials()))
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
 
            
762
 
            # Note: gnutls.connection.X509Credentials is really a
763
 
            # generic GnuTLS certificate credentials object so long as
764
 
            # no X.509 keys are added to it.  Therefore, we can use it
765
 
            # here despite using OpenPGP certificates.
766
 
            
767
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
768
 
            #                     "+AES-256-CBC", "+SHA1",
769
 
            #                     "+COMP-NULL", "+CTYPE-OPENPGP",
770
 
            #                     "+DHE-DSS"))
771
 
            # Use a fallback default, since this MUST be set.
772
 
            priority = self.server.settings.get("priority", "NORMAL")
773
 
            (gnutls.library.functions
774
 
             .gnutls_priority_set_direct(session._c_object,
775
 
                                         priority, None))
776
 
            
777
 
            try:
778
 
                session.handshake()
779
 
            except gnutls.errors.GNUTLSError, error:
780
 
                logger.warning(u"Handshake failed: %s", error)
781
 
                # Do not run session.bye() here: the session is not
782
 
                # established.  Just abandon the request.
783
 
                return
784
 
            logger.debug(u"Handshake succeeded")
785
 
            try:
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
 
    """
827
 
    def process_request(self, request, client_address):
828
 
        """This overrides and wraps the original process_request().
829
 
        This function creates a new pipe in self.pipe 
830
 
        """
831
 
        self.pipe = os.pipe()
832
 
        super(ForkingMixInWithPipe,
833
 
              self).process_request(request, client_address)
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):
840
 
        """Dummy function; override as necessary"""
841
 
        os.close(source)
842
 
        return False
843
 
 
844
 
 
845
 
class IPv6_TCPServer(ForkingMixInWithPipe,
846
 
                     SocketServer.TCPServer, object):
847
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
 
445
                     unicode(self.client_address))
 
446
        session = gnutls.connection.ClientSession\
 
447
                  (self.request, gnutls.connection.X509Credentials())
 
448
        
 
449
        line = self.request.makefile().readline()
 
450
        logger.debug(u"Protocol version: %r", line)
 
451
        try:
 
452
            if int(line.strip().split()[0]) > 1:
 
453
                raise RuntimeError
 
454
        except (ValueError, IndexError, RuntimeError), error:
 
455
            logger.error(u"Unknown protocol version: %s", error)
 
456
            return
 
457
        
 
458
        # Note: gnutls.connection.X509Credentials is really a generic
 
459
        # GnuTLS certificate credentials object so long as no X.509
 
460
        # keys are added to it.  Therefore, we can use it here despite
 
461
        # using OpenPGP certificates.
 
462
        
 
463
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
464
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
465
        #                "+DHE-DSS"))
 
466
        priority = "NORMAL"             # Fallback default, since this
 
467
                                        # MUST be set.
 
468
        if self.server.settings["priority"]:
 
469
            priority = self.server.settings["priority"]
 
470
        gnutls.library.functions.gnutls_priority_set_direct\
 
471
            (session._c_object, priority, None);
 
472
        
 
473
        try:
 
474
            session.handshake()
 
475
        except gnutls.errors.GNUTLSError, error:
 
476
            logger.warning(u"Handshake failed: %s", error)
 
477
            # Do not run session.bye() here: the session is not
 
478
            # established.  Just abandon the request.
 
479
            return
 
480
        try:
 
481
            fpr = fingerprint(peer_certificate(session))
 
482
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
483
            logger.warning(u"Bad certificate: %s", error)
 
484
            session.bye()
 
485
            return
 
486
        logger.debug(u"Fingerprint: %s", fpr)
 
487
        client = None
 
488
        for c in self.server.clients:
 
489
            if c.fingerprint == fpr:
 
490
                client = c
 
491
                break
 
492
        if not client:
 
493
            logger.warning(u"Client not found for fingerprint: %s",
 
494
                           fpr)
 
495
            session.bye()
 
496
            return
 
497
        # Have to check if client.still_valid(), since it is possible
 
498
        # that the client timed out while establishing the GnuTLS
 
499
        # session.
 
500
        if not client.still_valid():
 
501
            logger.warning(u"Client %(name)s is invalid",
 
502
                           vars(client))
 
503
            session.bye()
 
504
            return
 
505
        sent_size = 0
 
506
        while sent_size < len(client.secret):
 
507
            sent = session.send(client.secret[sent_size:])
 
508
            logger.debug(u"Sent: %d, remaining: %d",
 
509
                         sent, len(client.secret)
 
510
                         - (sent_size + sent))
 
511
            sent_size += sent
 
512
        session.bye()
 
513
 
 
514
 
 
515
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
516
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
848
517
    Attributes:
849
518
        settings:       Server settings
850
519
        clients:        Set() of Client objects
851
 
        enabled:        Boolean; whether this server is activated yet
852
520
    """
853
521
    address_family = socket.AF_INET6
854
522
    def __init__(self, *args, **kwargs):
858
526
        if "clients" in kwargs:
859
527
            self.clients = kwargs["clients"]
860
528
            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)
 
529
        return super(type(self), self).__init__(*args, **kwargs)
867
530
    def server_bind(self):
868
531
        """This overrides the normal server_bind() function
869
532
        to bind to an interface if one was specified, and also NOT to
881
544
                                 u" bind to interface %s",
882
545
                                 self.settings["interface"])
883
546
                else:
884
 
                    raise
 
547
                    raise error
885
548
        # Only bind(2) the socket if we really need to.
886
549
        if self.server_address[0] or self.server_address[1]:
887
550
            if not self.server_address[0]:
888
 
                if self.address_family == socket.AF_INET6:
889
 
                    any_address = "::" # in6addr_any
890
 
                else:
891
 
                    any_address = socket.INADDR_ANY
892
 
                self.server_address = (any_address,
 
551
                in6addr_any = "::"
 
552
                self.server_address = (in6addr_any,
893
553
                                       self.server_address[1])
894
554
            elif not self.server_address[1]:
895
555
                self.server_address = (self.server_address[0],
901
561
#                                            if_nametoindex
902
562
#                                            (self.settings
903
563
#                                             ["interface"]))
904
 
            return super(IPv6_TCPServer, self).server_bind()
905
 
    def server_activate(self):
906
 
        if self.enabled:
907
 
            return super(IPv6_TCPServer, self).server_activate()
908
 
    def enable(self):
909
 
        self.enabled = True
910
 
    def handle_ipc(self, source, condition, file_objects={}):
911
 
        condition_names = {
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).
920
 
            }
921
 
        conditions_string = ' | '.join(name
922
 
                                       for cond, name in
923
 
                                       condition_names.iteritems()
924
 
                                       if cond & condition)
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
940
 
            return False
941
 
        
942
 
        logger.debug("IPC command: %r\n" % cmdline)
943
 
        
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()
964
 
                    break
965
 
        else:
966
 
            logger.error("Unknown IPC command: %r", cmdline)
967
 
        
968
 
        # Keep calling this function
969
 
        return True
 
564
            return super(type(self), self).server_bind()
970
565
 
971
566
 
972
567
def string_to_delta(interval):
973
568
    """Parse a string and return a datetime.timedelta
974
 
    
 
569
 
975
570
    >>> string_to_delta('7d')
976
571
    datetime.timedelta(7)
977
572
    >>> string_to_delta('60s')
988
583
    timevalue = datetime.timedelta(0)
989
584
    for s in interval.split():
990
585
        try:
991
 
            suffix = unicode(s[-1])
992
 
            value = int(s[:-1])
 
586
            suffix=unicode(s[-1])
 
587
            value=int(s[:-1])
993
588
            if suffix == u"d":
994
589
                delta = datetime.timedelta(value)
995
590
            elif suffix == u"s":
1029
624
    elif state == avahi.ENTRY_GROUP_FAILURE:
1030
625
        logger.critical(u"Avahi: Error in group state changed %s",
1031
626
                        unicode(error))
1032
 
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
 
627
        raise AvahiGroupError("State changed: %s", str(error))
1033
628
 
1034
629
def if_nametoindex(interface):
1035
630
    """Call the C function if_nametoindex(), or equivalent"""
1036
631
    global if_nametoindex
1037
632
    try:
1038
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
1039
 
                          (ctypes.util.find_library("c"))
1040
 
                          .if_nametoindex)
 
633
        if "ctypes.util" not in sys.modules:
 
634
            import ctypes.util
 
635
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
636
            (ctypes.util.find_library("c")).if_nametoindex
1041
637
    except (OSError, AttributeError):
1042
638
        if "struct" not in sys.modules:
1043
639
            import struct
1046
642
        def if_nametoindex(interface):
1047
643
            "Get an interface index the hard way, i.e. using fcntl()"
1048
644
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1049
 
            with closing(socket.socket()) as s:
1050
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1051
 
                                    struct.pack("16s16x", interface))
 
645
            s = socket.socket()
 
646
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
647
                                struct.pack("16s16x", interface))
 
648
            s.close()
1052
649
            interface_index = struct.unpack("I", ifreq[16:20])[0]
1053
650
            return interface_index
1054
651
    return if_nametoindex(interface)
1078
675
 
1079
676
 
1080
677
def main():
1081
 
    
1082
 
    ######################################################################
1083
 
    # Parsing of options, both command line and config file
1084
 
    
1085
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
678
    global main_loop_started
 
679
    main_loop_started = False
 
680
    
 
681
    parser = OptionParser(version = "%%prog %s" % version)
1086
682
    parser.add_option("-i", "--interface", type="string",
1087
683
                      metavar="IF", help="Bind to interface IF")
1088
684
    parser.add_option("-a", "--address", type="string",
1089
685
                      help="Address to listen for requests on")
1090
686
    parser.add_option("-p", "--port", type="int",
1091
687
                      help="Port number to receive requests on")
1092
 
    parser.add_option("--check", action="store_true",
 
688
    parser.add_option("--check", action="store_true", default=False,
1093
689
                      help="Run self-test")
1094
690
    parser.add_option("--debug", action="store_true",
1095
691
                      help="Debug mode; run in foreground and log to"
1102
698
                      default="/etc/mandos", metavar="DIR",
1103
699
                      help="Directory to search for configuration"
1104
700
                      " 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")
1111
 
    options = parser.parse_args()[0]
 
701
    (options, args) = parser.parse_args()
1112
702
    
1113
703
    if options.check:
1114
704
        import doctest
1123
713
                        "priority":
1124
714
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1125
715
                        "servicename": "Mandos",
1126
 
                        "use_dbus": "True",
1127
 
                        "use_ipv6": "True",
1128
716
                        }
1129
717
    
1130
718
    # Parse config file for server-global settings
1133
721
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
1134
722
    # Convert the SafeConfigParser object to a dict
1135
723
    server_settings = server_config.defaults()
1136
 
    # Use the appropriate methods on the non-string config options
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")
1143
 
    if server_settings["port"]:
1144
 
        server_settings["port"] = server_config.getint("DEFAULT",
1145
 
                                                       "port")
 
724
    # Use getboolean on the boolean config option
 
725
    server_settings["debug"] = server_config.getboolean\
 
726
                               ("DEFAULT", "debug")
1146
727
    del server_config
1147
728
    
1148
729
    # Override the settings from the config file with command line
1149
730
    # options, if set.
1150
731
    for option in ("interface", "address", "port", "debug",
1151
 
                   "priority", "servicename", "configdir",
1152
 
                   "use_dbus", "use_ipv6"):
 
732
                   "priority", "servicename", "configdir"):
1153
733
        value = getattr(options, option)
1154
734
        if value is not None:
1155
735
            server_settings[option] = value
1156
736
    del options
1157
737
    # Now we have our good server settings in "server_settings"
1158
738
    
1159
 
    ##################################################################
1160
 
    
1161
 
    # For convenience
1162
739
    debug = server_settings["debug"]
1163
 
    use_dbus = server_settings["use_dbus"]
1164
 
    use_ipv6 = server_settings["use_ipv6"]
1165
740
    
1166
741
    if not debug:
1167
742
        syslogger.setLevel(logging.WARNING)
1168
743
        console.setLevel(logging.WARNING)
1169
744
    
1170
745
    if server_settings["servicename"] != "Mandos":
1171
 
        syslogger.setFormatter(logging.Formatter
1172
 
                               ('Mandos (%s) [%%(process)d]:'
1173
 
                                ' %%(levelname)s: %%(message)s'
 
746
        syslogger.setFormatter(logging.Formatter\
 
747
                               ('Mandos (%s): %%(levelname)s:'
 
748
                                ' %%(message)s'
1174
749
                                % server_settings["servicename"]))
1175
750
    
1176
751
    # Parse config file with clients
1177
752
    client_defaults = { "timeout": "1h",
1178
753
                        "interval": "5m",
1179
 
                        "checker": "fping -q -- %%(host)s",
 
754
                        "checker": "fping -q -- %(host)s",
1180
755
                        "host": "",
1181
756
                        }
1182
757
    client_config = ConfigParser.SafeConfigParser(client_defaults)
1183
758
    client_config.read(os.path.join(server_settings["configdir"],
1184
759
                                    "clients.conf"))
1185
 
 
1186
 
    global mandos_dbus_service
1187
 
    mandos_dbus_service = None
1188
 
    
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)
1200
 
    
1201
 
    try:
1202
 
        uid = pwd.getpwnam("_mandos").pw_uid
1203
 
        gid = pwd.getpwnam("_mandos").pw_gid
1204
 
    except KeyError:
1205
 
        try:
1206
 
            uid = pwd.getpwnam("mandos").pw_uid
1207
 
            gid = pwd.getpwnam("mandos").pw_gid
1208
 
        except KeyError:
1209
 
            try:
1210
 
                uid = pwd.getpwnam("nobody").pw_uid
1211
 
                gid = pwd.getpwnam("nogroup").pw_gid
1212
 
            except KeyError:
1213
 
                uid = 65534
1214
 
                gid = 65534
1215
 
    try:
1216
 
        os.setgid(gid)
1217
 
        os.setuid(uid)
1218
 
    except OSError, error:
1219
 
        if error[0] != errno.EPERM:
1220
 
            raise error
1221
 
    
1222
 
    # Enable all possible GnuTLS debugging
1223
 
    if debug:
1224
 
        # "Use a log level over 10 to enable all debugging options."
1225
 
        # - GnuTLS manual
1226
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1227
 
        
1228
 
        @gnutls.library.types.gnutls_log_func
1229
 
        def debug_gnutls(level, string):
1230
 
            logger.debug("GnuTLS: %s", string[:-1])
1231
 
        
1232
 
        (gnutls.library.functions
1233
 
         .gnutls_global_set_log_function(debug_gnutls))
1234
760
    
1235
761
    global service
1236
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1237
762
    service = AvahiService(name = server_settings["servicename"],
1238
 
                           servicetype = "_mandos._tcp",
1239
 
                           protocol = protocol)
 
763
                           type = "_mandos._tcp", );
1240
764
    if server_settings["interface"]:
1241
 
        service.interface = (if_nametoindex
1242
 
                             (server_settings["interface"]))
 
765
        service.interface = if_nametoindex\
 
766
                            (server_settings["interface"])
1243
767
    
1244
768
    global main_loop
1245
769
    global bus
1252
776
                                           avahi.DBUS_PATH_SERVER),
1253
777
                            avahi.DBUS_INTERFACE_SERVER)
1254
778
    # End of Avahi example code
1255
 
    if use_dbus:
1256
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1257
 
    
1258
 
    client_class = Client
1259
 
    if use_dbus:
1260
 
        client_class = ClientDBus
1261
 
    clients.update(Set(
1262
 
            client_class(name = section,
1263
 
                         config= dict(client_config.items(section)))
1264
 
            for section in client_config.sections()))
 
779
    
 
780
    clients = Set()
 
781
    def remove_from_clients(client):
 
782
        clients.remove(client)
 
783
        if not clients:
 
784
            logger.critical(u"No clients left, exiting")
 
785
            sys.exit()
 
786
    
 
787
    clients.update(Set(Client(name = section,
 
788
                              stop_hook = remove_from_clients,
 
789
                              config
 
790
                              = dict(client_config.items(section)))
 
791
                       for section in client_config.sections()))
1265
792
    if not clients:
1266
 
        logger.warning(u"No clients defined")
 
793
        logger.critical(u"No clients defined")
 
794
        sys.exit(1)
1267
795
    
1268
796
    if debug:
1269
797
        # Redirect stdin so all checkers get /dev/null
1277
805
        # Close all input and output, do double fork, etc.
1278
806
        daemon()
1279
807
    
 
808
    pidfilename = "/var/run/mandos/mandos.pid"
 
809
    pid = os.getpid()
1280
810
    try:
1281
 
        with closing(pidfile):
1282
 
            pid = os.getpid()
1283
 
            pidfile.write(str(pid) + "\n")
 
811
        pidfile = open(pidfilename, "w")
 
812
        pidfile.write(str(pid) + "\n")
 
813
        pidfile.close()
1284
814
        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
 
815
    except IOError, err:
 
816
        logger.error(u"Could not write %s file with PID %d",
 
817
                     pidfilename, os.getpid())
1292
818
    
1293
819
    def cleanup():
1294
820
        "Cleanup function; run on exit"
1301
827
        
1302
828
        while clients:
1303
829
            client = clients.pop()
1304
 
            client.disable_hook = None
1305
 
            client.disable()
 
830
            client.stop_hook = None
 
831
            client.stop()
1306
832
    
1307
833
    atexit.register(cleanup)
1308
834
    
1311
837
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1312
838
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1313
839
    
1314
 
    if use_dbus:
1315
 
        class MandosDBusService(dbus.service.Object):
1316
 
            """A D-Bus proxy object"""
1317
 
            def __init__(self):
1318
 
                dbus.service.Object.__init__(self, bus, "/")
1319
 
            _interface = u"se.bsnet.fukt.Mandos"
1320
 
            
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")
1332
 
            def ClientRemoved(self, objpath, name):
1333
 
                "D-Bus signal"
1334
 
                pass
1335
 
            
1336
 
            @dbus.service.method(_interface, out_signature="ao")
1337
 
            def GetAllClients(self):
1338
 
                "D-Bus method"
1339
 
                return dbus.Array(c.dbus_object_path for c in clients)
1340
 
            
1341
 
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
1342
 
            def GetAllClientsWithProperties(self):
1343
 
                "D-Bus method"
1344
 
                return dbus.Dictionary(
1345
 
                    ((c.dbus_object_path, c.GetAllProperties())
1346
 
                     for c in clients),
1347
 
                    signature="oa{sv}")
1348
 
            
1349
 
            @dbus.service.method(_interface, in_signature="o")
1350
 
            def RemoveClient(self, object_path):
1351
 
                "D-Bus method"
1352
 
                for c in clients:
1353
 
                    if c.dbus_object_path == object_path:
1354
 
                        clients.remove(c)
1355
 
                        c.remove_from_connection()
1356
 
                        # Don't signal anything except ClientRemoved
1357
 
                        c.disable(signal=False)
1358
 
                        # Emit D-Bus signal
1359
 
                        self.ClientRemoved(object_path, c.name)
1360
 
                        return
1361
 
                raise KeyError
1362
 
            
1363
 
            del _interface
1364
 
        
1365
 
        mandos_dbus_service = MandosDBusService()
1366
 
    
1367
840
    for client in clients:
1368
 
        if use_dbus:
1369
 
            # Emit D-Bus signal
1370
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path,
1371
 
                                            client.GetAllProperties())
1372
 
        client.enable()
1373
 
    
1374
 
    tcp_server.enable()
1375
 
    tcp_server.server_activate()
1376
 
    
 
841
        client.start()
 
842
    
 
843
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
844
                                 server_settings["port"]),
 
845
                                tcp_handler,
 
846
                                settings=server_settings,
 
847
                                clients=clients)
1377
848
    # Find out what port we got
1378
849
    service.port = tcp_server.socket.getsockname()[1]
1379
 
    if use_ipv6:
1380
 
        logger.info(u"Now listening on address %r, port %d,"
1381
 
                    " flowinfo %d, scope_id %d"
1382
 
                    % tcp_server.socket.getsockname())
1383
 
    else:                       # IPv4
1384
 
        logger.info(u"Now listening on address %r, port %d"
1385
 
                    % tcp_server.socket.getsockname())
 
850
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
851
                u" scope_id %d" % tcp_server.socket.getsockname())
1386
852
    
1387
853
    #service.interface = tcp_server.socket.getsockname()[3]
1388
854
    
1398
864
        
1399
865
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1400
866
                             lambda *args, **kwargs:
1401
 
                             (tcp_server.handle_request
1402
 
                              (*args[2:], **kwargs) or True))
 
867
                             tcp_server.handle_request\
 
868
                             (*args[2:], **kwargs) or True)
1403
869
        
1404
870
        logger.debug(u"Starting main loop")
 
871
        main_loop_started = True
1405
872
        main_loop.run()
1406
873
    except AvahiError, error:
1407
 
        logger.critical(u"AvahiError: %s", error)
 
874
        logger.critical(u"AvahiError: %s" + unicode(error))
1408
875
        sys.exit(1)
1409
876
    except KeyboardInterrupt:
1410
877
        if debug:
1411
 
            print >> sys.stderr
1412
 
        logger.debug("Server received KeyboardInterrupt")
1413
 
    logger.debug("Server exiting")
 
878
            print
1414
879
 
1415
880
if __name__ == '__main__':
1416
881
    main()