/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2009-01-31 10:33:17 UTC
  • mfrom: (24.1.129 mandos)
  • Revision ID: teddy@fukt.bsnet.se-20090131103317-wzqvyr532sjcjt7u
Merge from Björn:

* mandos-ctl: New option "--remove-client".  Only default to listing
              clients if no clients were given on the command line.
* plugins.d/mandos-client.c: Lower kernel log level while bringing up
                             network interface.  New option "--delay"
                             to control the maximum delay to wait for
                             running interface.
* plugins.d/mandos-client.xml (SYNOPSIS, OPTIONS): New option
                                                   "--delay".

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Lines of Context:
mandos
11
11
# and some lines in "main".
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12
# 
13
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# Everything else is
14
 
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
 
14
# Copyright © 2008,2009 Teddy Hogeborn
 
15
# Copyright © 2008,2009 Björn Påhlsson
15
16
# 
16
17
# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
24
25
#     GNU General Public License for more details.
25
26
# 
26
27
# You should have received a copy of the GNU General Public License
27
 
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
28
# along with this program.  If not, see
 
29
# <http://www.gnu.org/licenses/>.
28
30
# 
29
31
# Contact the authors at <mandos@fukt.bsnet.se>.
30
32
# 
31
33
 
32
 
from __future__ import division
 
34
from __future__ import division, with_statement, absolute_import
33
35
 
34
36
import SocketServer
35
37
import socket
36
 
import select
37
 
from optparse import OptionParser
 
38
import optparse
38
39
import datetime
39
40
import errno
40
41
import gnutls.crypto
54
55
import stat
55
56
import logging
56
57
import logging.handlers
 
58
import pwd
 
59
from contextlib import closing
57
60
 
58
61
import dbus
 
62
import dbus.service
59
63
import gobject
60
64
import avahi
61
65
from dbus.mainloop.glib import DBusGMainLoop
62
66
import ctypes
 
67
import ctypes.util
63
68
 
 
69
version = "1.0.5"
64
70
 
65
71
logger = logging.Logger('mandos')
66
 
syslogger = logging.handlers.SysLogHandler\
67
 
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON)
68
 
syslogger.setFormatter(logging.Formatter\
69
 
                        ('%(levelname)s: %(message)s'))
 
72
syslogger = (logging.handlers.SysLogHandler
 
73
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
74
              address = "/dev/log"))
 
75
syslogger.setFormatter(logging.Formatter
 
76
                       ('Mandos: %(levelname)s: %(message)s'))
70
77
logger.addHandler(syslogger)
71
 
del syslogger
72
78
 
 
79
console = logging.StreamHandler()
 
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
 
81
                                       ' %(message)s'))
 
82
logger.addHandler(console)
73
83
 
74
84
class AvahiError(Exception):
75
 
    def __init__(self, value):
 
85
    def __init__(self, value, *args, **kwargs):
76
86
        self.value = value
77
 
    def __str__(self):
78
 
        return repr(self.value)
 
87
        super(AvahiError, self).__init__(value, *args, **kwargs)
 
88
    def __unicode__(self):
 
89
        return unicode(repr(self.value))
79
90
 
80
91
class AvahiServiceError(AvahiError):
81
92
    pass
101
112
                  a sensible number of times
102
113
    """
103
114
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
104
 
                 type = None, port = None, TXT = None, domain = "",
105
 
                 host = "", max_renames = 12):
 
115
                 servicetype = None, port = None, TXT = None,
 
116
                 domain = "", host = "", max_renames = 32768):
106
117
        self.interface = interface
107
118
        self.name = name
108
 
        self.type = type
 
119
        self.type = servicetype
109
120
        self.port = port
110
 
        if TXT is None:
111
 
            self.TXT = []
112
 
        else:
113
 
            self.TXT = TXT
 
121
        self.TXT = TXT if TXT is not None else []
114
122
        self.domain = domain
115
123
        self.host = host
116
124
        self.rename_count = 0
 
125
        self.max_renames = max_renames
117
126
    def rename(self):
118
127
        """Derived from the Avahi example code"""
119
128
        if self.rename_count >= self.max_renames:
120
 
            logger.critical(u"No suitable service name found after %i"
121
 
                            u" retries, exiting.", rename_count)
122
 
            raise AvahiServiceError("Too many renames")
123
 
        name = server.GetAlternativeServiceName(name)
124
 
        logger.error(u"Changing name to %r ...", name)
 
129
            logger.critical(u"No suitable Zeroconf service name found"
 
130
                            u" after %i retries, exiting.",
 
131
                            self.rename_count)
 
132
            raise AvahiServiceError(u"Too many renames")
 
133
        self.name = server.GetAlternativeServiceName(self.name)
 
134
        logger.info(u"Changing Zeroconf service name to %r ...",
 
135
                    str(self.name))
 
136
        syslogger.setFormatter(logging.Formatter
 
137
                               ('Mandos (%s): %%(levelname)s:'
 
138
                                ' %%(message)s' % self.name))
125
139
        self.remove()
126
140
        self.add()
127
141
        self.rename_count += 1
133
147
        """Derived from the Avahi example code"""
134
148
        global group
135
149
        if group is None:
136
 
            group = dbus.Interface\
137
 
                    (bus.get_object(avahi.DBUS_NAME,
 
150
            group = dbus.Interface(bus.get_object
 
151
                                   (avahi.DBUS_NAME,
138
152
                                    server.EntryGroupNew()),
139
 
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
153
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
140
154
            group.connect_to_signal('StateChanged',
141
155
                                    entry_group_state_changed)
142
 
        logger.debug(u"Adding service '%s' of type '%s' ...",
 
156
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
143
157
                     service.name, service.type)
144
158
        group.AddService(
145
159
                self.interface,         # interface
156
170
# End of Avahi example code
157
171
 
158
172
 
159
 
class Client(object):
 
173
def _datetime_to_dbus(dt, variant_level=0):
 
174
    """Convert a UTC datetime.datetime() to a D-Bus type."""
 
175
    return dbus.String(dt.isoformat(), variant_level=variant_level)
 
176
 
 
177
 
 
178
class Client(dbus.service.Object):
160
179
    """A representation of a client host served by this server.
161
180
    Attributes:
162
 
    name:      string; from the config file, used in log messages
 
181
    name:       string; from the config file, used in log messages and
 
182
                        D-Bus identifiers
163
183
    fingerprint: string (40 or 32 hexadecimal digits); used to
164
184
                 uniquely identify the client
165
 
    secret:    bytestring; sent verbatim (over TLS) to client
166
 
    fqdn:      string (FQDN); available for use by the checker command
167
 
    created:   datetime.datetime(); object creation, not client host
168
 
    last_checked_ok: datetime.datetime() or None if not yet checked OK
169
 
    timeout:   datetime.timedelta(); How long from last_checked_ok
170
 
                                     until this client is invalid
171
 
    interval:  datetime.timedelta(); How often to start a new checker
172
 
    stop_hook: If set, called by stop() as stop_hook(self)
173
 
    checker:   subprocess.Popen(); a running checker process used
174
 
                                   to see if the client lives.
175
 
                                   'None' if no process is running.
 
185
    secret:     bytestring; sent verbatim (over TLS) to client
 
186
    host:       string; available for use by the checker command
 
187
    created:    datetime.datetime(); (UTC) object creation
 
188
    last_enabled: datetime.datetime(); (UTC)
 
189
    enabled:    bool()
 
190
    last_checked_ok: datetime.datetime(); (UTC) or None
 
191
    timeout:    datetime.timedelta(); How long from last_checked_ok
 
192
                                      until this client is invalid
 
193
    interval:   datetime.timedelta(); How often to start a new checker
 
194
    disable_hook:  If set, called by disable() as disable_hook(self)
 
195
    checker:    subprocess.Popen(); a running checker process used
 
196
                                    to see if the client lives.
 
197
                                    'None' if no process is running.
176
198
    checker_initiator_tag: a gobject event source tag, or None
177
 
    stop_initiator_tag:    - '' -
 
199
    disable_initiator_tag:    - '' -
178
200
    checker_callback_tag:  - '' -
179
201
    checker_command: string; External command which is run to check if
180
202
                     client lives.  %() expansions are done at
181
203
                     runtime with vars(self) as dict, so that for
182
204
                     instance %(name)s can be used in the command.
183
 
    Private attibutes:
184
 
    _timeout: Real variable for 'timeout'
185
 
    _interval: Real variable for 'interval'
186
 
    _timeout_milliseconds: Used when calling gobject.timeout_add()
187
 
    _interval_milliseconds: - '' -
 
205
    use_dbus: bool(); Whether to provide D-Bus interface and signals
 
206
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
188
207
    """
189
 
    def _set_timeout(self, timeout):
190
 
        "Setter function for 'timeout' attribute"
191
 
        self._timeout = timeout
192
 
        self._timeout_milliseconds = ((self.timeout.days
193
 
                                       * 24 * 60 * 60 * 1000)
194
 
                                      + (self.timeout.seconds * 1000)
195
 
                                      + (self.timeout.microseconds
196
 
                                         // 1000))
197
 
    timeout = property(lambda self: self._timeout,
198
 
                       _set_timeout)
199
 
    del _set_timeout
200
 
    def _set_interval(self, interval):
201
 
        "Setter function for 'interval' attribute"
202
 
        self._interval = interval
203
 
        self._interval_milliseconds = ((self.interval.days
204
 
                                        * 24 * 60 * 60 * 1000)
205
 
                                       + (self.interval.seconds
206
 
                                          * 1000)
207
 
                                       + (self.interval.microseconds
208
 
                                          // 1000))
209
 
    interval = property(lambda self: self._interval,
210
 
                        _set_interval)
211
 
    del _set_interval
212
 
    def __init__(self, name = None, stop_hook=None, config={}):
 
208
    def timeout_milliseconds(self):
 
209
        "Return the 'timeout' attribute in milliseconds"
 
210
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
 
211
                + (self.timeout.seconds * 1000)
 
212
                + (self.timeout.microseconds // 1000))
 
213
    
 
214
    def interval_milliseconds(self):
 
215
        "Return the 'interval' attribute in milliseconds"
 
216
        return ((self.interval.days * 24 * 60 * 60 * 1000)
 
217
                + (self.interval.seconds * 1000)
 
218
                + (self.interval.microseconds // 1000))
 
219
    
 
220
    def __init__(self, name = None, disable_hook=None, config=None,
 
221
                 use_dbus=True):
213
222
        """Note: the 'checker' key in 'config' sets the
214
223
        'checker_command' attribute and *not* the 'checker'
215
224
        attribute."""
216
225
        self.name = name
 
226
        if config is None:
 
227
            config = {}
217
228
        logger.debug(u"Creating client %r", self.name)
 
229
        self.use_dbus = False   # During __init__
218
230
        # Uppercase and remove spaces from fingerprint for later
219
231
        # comparison purposes with return value from the fingerprint()
220
232
        # function
221
 
        self.fingerprint = config["fingerprint"].upper()\
222
 
                           .replace(u" ", u"")
 
233
        self.fingerprint = (config["fingerprint"].upper()
 
234
                            .replace(u" ", u""))
223
235
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
224
236
        if "secret" in config:
225
237
            self.secret = config["secret"].decode(u"base64")
226
238
        elif "secfile" in config:
227
 
            sf = open(config["secfile"])
228
 
            self.secret = sf.read()
229
 
            sf.close()
 
239
            with closing(open(os.path.expanduser
 
240
                              (os.path.expandvars
 
241
                               (config["secfile"])))) as secfile:
 
242
                self.secret = secfile.read()
230
243
        else:
231
244
            raise TypeError(u"No secret or secfile for client %s"
232
245
                            % self.name)
233
 
        self.fqdn = config.get("fqdn", "")
234
 
        self.created = datetime.datetime.now()
 
246
        self.host = config.get("host", "")
 
247
        self.created = datetime.datetime.utcnow()
 
248
        self.enabled = False
 
249
        self.last_enabled = None
235
250
        self.last_checked_ok = None
236
251
        self.timeout = string_to_delta(config["timeout"])
237
252
        self.interval = string_to_delta(config["interval"])
238
 
        self.stop_hook = stop_hook
 
253
        self.disable_hook = disable_hook
239
254
        self.checker = None
240
255
        self.checker_initiator_tag = None
241
 
        self.stop_initiator_tag = None
 
256
        self.disable_initiator_tag = None
242
257
        self.checker_callback_tag = None
243
 
        self.check_command = config["checker"]
244
 
    def start(self):
 
258
        self.checker_command = config["checker"]
 
259
        self.last_connect = None
 
260
        # Only now, when this client is initialized, can it show up on
 
261
        # the D-Bus
 
262
        self.use_dbus = use_dbus
 
263
        if self.use_dbus:
 
264
            self.dbus_object_path = (dbus.ObjectPath
 
265
                                     ("/clients/"
 
266
                                      + self.name.replace(".", "_")))
 
267
            dbus.service.Object.__init__(self, bus,
 
268
                                         self.dbus_object_path)
 
269
    
 
270
    def enable(self):
245
271
        """Start this client's checker and timeout hooks"""
 
272
        self.last_enabled = datetime.datetime.utcnow()
246
273
        # Schedule a new checker to be started an 'interval' from now,
247
274
        # and every interval from then on.
248
 
        self.checker_initiator_tag = gobject.timeout_add\
249
 
                                     (self._interval_milliseconds,
250
 
                                      self.start_checker)
 
275
        self.checker_initiator_tag = (gobject.timeout_add
 
276
                                      (self.interval_milliseconds(),
 
277
                                       self.start_checker))
251
278
        # Also start a new checker *right now*.
252
279
        self.start_checker()
253
 
        # Schedule a stop() when 'timeout' has passed
254
 
        self.stop_initiator_tag = gobject.timeout_add\
255
 
                                  (self._timeout_milliseconds,
256
 
                                   self.stop)
257
 
    def stop(self):
258
 
        """Stop this client.
259
 
        The possibility that a client might be restarted is left open,
260
 
        but not currently used."""
261
 
        # If this client doesn't have a secret, it is already stopped.
262
 
        if self.secret:
263
 
            logger.info(u"Stopping client %s", self.name)
264
 
            self.secret = None
265
 
        else:
 
280
        # Schedule a disable() when 'timeout' has passed
 
281
        self.disable_initiator_tag = (gobject.timeout_add
 
282
                                   (self.timeout_milliseconds(),
 
283
                                    self.disable))
 
284
        self.enabled = True
 
285
        if self.use_dbus:
 
286
            # Emit D-Bus signals
 
287
            self.PropertyChanged(dbus.String(u"enabled"),
 
288
                                 dbus.Boolean(True, variant_level=1))
 
289
            self.PropertyChanged(dbus.String(u"last_enabled"),
 
290
                                 (_datetime_to_dbus(self.last_enabled,
 
291
                                                    variant_level=1)))
 
292
    
 
293
    def disable(self):
 
294
        """Disable this client."""
 
295
        if not getattr(self, "enabled", False):
266
296
            return False
267
 
        if getattr(self, "stop_initiator_tag", False):
268
 
            gobject.source_remove(self.stop_initiator_tag)
269
 
            self.stop_initiator_tag = None
 
297
        logger.info(u"Disabling client %s", self.name)
 
298
        if getattr(self, "disable_initiator_tag", False):
 
299
            gobject.source_remove(self.disable_initiator_tag)
 
300
            self.disable_initiator_tag = None
270
301
        if getattr(self, "checker_initiator_tag", False):
271
302
            gobject.source_remove(self.checker_initiator_tag)
272
303
            self.checker_initiator_tag = None
273
304
        self.stop_checker()
274
 
        if self.stop_hook:
275
 
            self.stop_hook(self)
 
305
        if self.disable_hook:
 
306
            self.disable_hook(self)
 
307
        self.enabled = False
 
308
        if self.use_dbus:
 
309
            # Emit D-Bus signal
 
310
            self.PropertyChanged(dbus.String(u"enabled"),
 
311
                                 dbus.Boolean(False, variant_level=1))
276
312
        # Do not run this again if called by a gobject.timeout_add
277
313
        return False
 
314
    
278
315
    def __del__(self):
279
 
        self.stop_hook = None
280
 
        self.stop()
281
 
    def checker_callback(self, pid, condition):
 
316
        self.disable_hook = None
 
317
        self.disable()
 
318
    
 
319
    def checker_callback(self, pid, condition, command):
282
320
        """The checker has completed, so take appropriate actions."""
283
 
        now = datetime.datetime.now()
284
321
        self.checker_callback_tag = None
285
322
        self.checker = None
286
 
        if os.WIFEXITED(condition) \
287
 
               and (os.WEXITSTATUS(condition) == 0):
288
 
            logger.info(u"Checker for %(name)s succeeded",
289
 
                        vars(self))
290
 
            self.last_checked_ok = now
291
 
            gobject.source_remove(self.stop_initiator_tag)
292
 
            self.stop_initiator_tag = gobject.timeout_add\
293
 
                                      (self._timeout_milliseconds,
294
 
                                       self.stop)
295
 
        elif not os.WIFEXITED(condition):
 
323
        if self.use_dbus:
 
324
            # Emit D-Bus signal
 
325
            self.PropertyChanged(dbus.String(u"checker_running"),
 
326
                                 dbus.Boolean(False, variant_level=1))
 
327
        if os.WIFEXITED(condition):
 
328
            exitstatus = os.WEXITSTATUS(condition)
 
329
            if exitstatus == 0:
 
330
                logger.info(u"Checker for %(name)s succeeded",
 
331
                            vars(self))
 
332
                self.checked_ok()
 
333
            else:
 
334
                logger.info(u"Checker for %(name)s failed",
 
335
                            vars(self))
 
336
            if self.use_dbus:
 
337
                # Emit D-Bus signal
 
338
                self.CheckerCompleted(dbus.Int16(exitstatus),
 
339
                                      dbus.Int64(condition),
 
340
                                      dbus.String(command))
 
341
        else:
296
342
            logger.warning(u"Checker for %(name)s crashed?",
297
343
                           vars(self))
298
 
        else:
299
 
            logger.info(u"Checker for %(name)s failed",
300
 
                        vars(self))
 
344
            if self.use_dbus:
 
345
                # Emit D-Bus signal
 
346
                self.CheckerCompleted(dbus.Int16(-1),
 
347
                                      dbus.Int64(condition),
 
348
                                      dbus.String(command))
 
349
    
 
350
    def checked_ok(self):
 
351
        """Bump up the timeout for this client.
 
352
        This should only be called when the client has been seen,
 
353
        alive and well.
 
354
        """
 
355
        self.last_checked_ok = datetime.datetime.utcnow()
 
356
        gobject.source_remove(self.disable_initiator_tag)
 
357
        self.disable_initiator_tag = (gobject.timeout_add
 
358
                                      (self.timeout_milliseconds(),
 
359
                                       self.disable))
 
360
        if self.use_dbus:
 
361
            # Emit D-Bus signal
 
362
            self.PropertyChanged(
 
363
                dbus.String(u"last_checked_ok"),
 
364
                (_datetime_to_dbus(self.last_checked_ok,
 
365
                                   variant_level=1)))
 
366
    
301
367
    def start_checker(self):
302
368
        """Start a new checker subprocess if one is not running.
303
369
        If a checker already exists, leave it running and do
312
378
        # is as it should be.
313
379
        if self.checker is None:
314
380
            try:
315
 
                # In case check_command has exactly one % operator
316
 
                command = self.check_command % self.fqdn
 
381
                # In case checker_command has exactly one % operator
 
382
                command = self.checker_command % self.host
317
383
            except TypeError:
318
384
                # Escape attributes for the shell
319
385
                escaped_attrs = dict((key, re.escape(str(val)))
320
386
                                     for key, val in
321
387
                                     vars(self).iteritems())
322
388
                try:
323
 
                    command = self.check_command % escaped_attrs
 
389
                    command = self.checker_command % escaped_attrs
324
390
                except TypeError, error:
325
391
                    logger.error(u'Could not format string "%s":'
326
 
                                 u' %s', self.check_command, error)
 
392
                                 u' %s', self.checker_command, error)
327
393
                    return True # Try again later
328
394
            try:
329
395
                logger.info(u"Starting checker %r for %s",
330
396
                            command, self.name)
 
397
                # We don't need to redirect stdout and stderr, since
 
398
                # in normal mode, that is already done by daemon(),
 
399
                # and in debug mode we don't want to.  (Stdin is
 
400
                # always replaced by /dev/null.)
331
401
                self.checker = subprocess.Popen(command,
332
402
                                                close_fds=True,
333
403
                                                shell=True, cwd="/")
334
 
                self.checker_callback_tag = gobject.child_watch_add\
335
 
                                            (self.checker.pid,
336
 
                                             self.checker_callback)
337
 
            except subprocess.OSError, error:
 
404
                if self.use_dbus:
 
405
                    # Emit D-Bus signal
 
406
                    self.CheckerStarted(command)
 
407
                    self.PropertyChanged(
 
408
                        dbus.String("checker_running"),
 
409
                        dbus.Boolean(True, variant_level=1))
 
410
                self.checker_callback_tag = (gobject.child_watch_add
 
411
                                             (self.checker.pid,
 
412
                                              self.checker_callback,
 
413
                                              data=command))
 
414
            except OSError, error:
338
415
                logger.error(u"Failed to start subprocess: %s",
339
416
                             error)
340
417
        # Re-run this periodically if run by gobject.timeout_add
341
418
        return True
 
419
    
342
420
    def stop_checker(self):
343
421
        """Force the checker process, if any, to stop."""
344
422
        if self.checker_callback_tag:
346
424
            self.checker_callback_tag = None
347
425
        if getattr(self, "checker", None) is None:
348
426
            return
349
 
        logger.debug("Stopping checker for %(name)s", vars(self))
 
427
        logger.debug(u"Stopping checker for %(name)s", vars(self))
350
428
        try:
351
429
            os.kill(self.checker.pid, signal.SIGTERM)
352
430
            #os.sleep(0.5)
356
434
            if error.errno != errno.ESRCH: # No such process
357
435
                raise
358
436
        self.checker = None
 
437
        if self.use_dbus:
 
438
            self.PropertyChanged(dbus.String(u"checker_running"),
 
439
                                 dbus.Boolean(False, variant_level=1))
 
440
    
359
441
    def still_valid(self):
360
442
        """Has the timeout not yet passed for this client?"""
361
 
        now = datetime.datetime.now()
 
443
        if not getattr(self, "enabled", False):
 
444
            return False
 
445
        now = datetime.datetime.utcnow()
362
446
        if self.last_checked_ok is None:
363
447
            return now < (self.created + self.timeout)
364
448
        else:
365
449
            return now < (self.last_checked_ok + self.timeout)
 
450
    
 
451
    ## D-Bus methods & signals
 
452
    _interface = u"se.bsnet.fukt.Mandos.Client"
 
453
    
 
454
    # CheckedOK - method
 
455
    CheckedOK = dbus.service.method(_interface)(checked_ok)
 
456
    CheckedOK.__name__ = "CheckedOK"
 
457
    
 
458
    # CheckerCompleted - signal
 
459
    @dbus.service.signal(_interface, signature="nxs")
 
460
    def CheckerCompleted(self, exitcode, waitstatus, command):
 
461
        "D-Bus signal"
 
462
        pass
 
463
    
 
464
    # CheckerStarted - signal
 
465
    @dbus.service.signal(_interface, signature="s")
 
466
    def CheckerStarted(self, command):
 
467
        "D-Bus signal"
 
468
        pass
 
469
    
 
470
    # GetAllProperties - method
 
471
    @dbus.service.method(_interface, out_signature="a{sv}")
 
472
    def GetAllProperties(self):
 
473
        "D-Bus method"
 
474
        return dbus.Dictionary({
 
475
                dbus.String("name"):
 
476
                    dbus.String(self.name, variant_level=1),
 
477
                dbus.String("fingerprint"):
 
478
                    dbus.String(self.fingerprint, variant_level=1),
 
479
                dbus.String("host"):
 
480
                    dbus.String(self.host, variant_level=1),
 
481
                dbus.String("created"):
 
482
                    _datetime_to_dbus(self.created, variant_level=1),
 
483
                dbus.String("last_enabled"):
 
484
                    (_datetime_to_dbus(self.last_enabled,
 
485
                                       variant_level=1)
 
486
                     if self.last_enabled is not None
 
487
                     else dbus.Boolean(False, variant_level=1)),
 
488
                dbus.String("enabled"):
 
489
                    dbus.Boolean(self.enabled, variant_level=1),
 
490
                dbus.String("last_checked_ok"):
 
491
                    (_datetime_to_dbus(self.last_checked_ok,
 
492
                                       variant_level=1)
 
493
                     if self.last_checked_ok is not None
 
494
                     else dbus.Boolean (False, variant_level=1)),
 
495
                dbus.String("timeout"):
 
496
                    dbus.UInt64(self.timeout_milliseconds(),
 
497
                                variant_level=1),
 
498
                dbus.String("interval"):
 
499
                    dbus.UInt64(self.interval_milliseconds(),
 
500
                                variant_level=1),
 
501
                dbus.String("checker"):
 
502
                    dbus.String(self.checker_command,
 
503
                                variant_level=1),
 
504
                dbus.String("checker_running"):
 
505
                    dbus.Boolean(self.checker is not None,
 
506
                                 variant_level=1),
 
507
                dbus.String("object_path"):
 
508
                    dbus.ObjectPath(self.dbus_object_path,
 
509
                                    variant_level=1)
 
510
                }, signature="sv")
 
511
    
 
512
    # IsStillValid - method
 
513
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
 
514
                    (still_valid))
 
515
    IsStillValid.__name__ = "IsStillValid"
 
516
    
 
517
    # PropertyChanged - signal
 
518
    @dbus.service.signal(_interface, signature="sv")
 
519
    def PropertyChanged(self, property, value):
 
520
        "D-Bus signal"
 
521
        pass
 
522
    
 
523
    # SetChecker - method
 
524
    @dbus.service.method(_interface, in_signature="s")
 
525
    def SetChecker(self, checker):
 
526
        "D-Bus setter method"
 
527
        self.checker_command = checker
 
528
        # Emit D-Bus signal
 
529
        self.PropertyChanged(dbus.String(u"checker"),
 
530
                             dbus.String(self.checker_command,
 
531
                                         variant_level=1))
 
532
    
 
533
    # SetHost - method
 
534
    @dbus.service.method(_interface, in_signature="s")
 
535
    def SetHost(self, host):
 
536
        "D-Bus setter method"
 
537
        self.host = host
 
538
        # Emit D-Bus signal
 
539
        self.PropertyChanged(dbus.String(u"host"),
 
540
                             dbus.String(self.host, variant_level=1))
 
541
    
 
542
    # SetInterval - method
 
543
    @dbus.service.method(_interface, in_signature="t")
 
544
    def SetInterval(self, milliseconds):
 
545
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
 
546
        # Emit D-Bus signal
 
547
        self.PropertyChanged(dbus.String(u"interval"),
 
548
                             (dbus.UInt64(self.interval_milliseconds(),
 
549
                                          variant_level=1)))
 
550
    
 
551
    # SetSecret - method
 
552
    @dbus.service.method(_interface, in_signature="ay",
 
553
                         byte_arrays=True)
 
554
    def SetSecret(self, secret):
 
555
        "D-Bus setter method"
 
556
        self.secret = str(secret)
 
557
    
 
558
    # SetTimeout - method
 
559
    @dbus.service.method(_interface, in_signature="t")
 
560
    def SetTimeout(self, milliseconds):
 
561
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
 
562
        # Emit D-Bus signal
 
563
        self.PropertyChanged(dbus.String(u"timeout"),
 
564
                             (dbus.UInt64(self.timeout_milliseconds(),
 
565
                                          variant_level=1)))
 
566
    
 
567
    # Enable - method
 
568
    Enable = dbus.service.method(_interface)(enable)
 
569
    Enable.__name__ = "Enable"
 
570
    
 
571
    # StartChecker - method
 
572
    @dbus.service.method(_interface)
 
573
    def StartChecker(self):
 
574
        "D-Bus method"
 
575
        self.start_checker()
 
576
    
 
577
    # Disable - method
 
578
    @dbus.service.method(_interface)
 
579
    def Disable(self):
 
580
        "D-Bus method"
 
581
        self.disable()
 
582
    
 
583
    # StopChecker - method
 
584
    StopChecker = dbus.service.method(_interface)(stop_checker)
 
585
    StopChecker.__name__ = "StopChecker"
 
586
    
 
587
    del _interface
366
588
 
367
589
 
368
590
def peer_certificate(session):
369
591
    "Return the peer's OpenPGP certificate as a bytestring"
370
592
    # If not an OpenPGP certificate...
371
 
    if gnutls.library.functions.gnutls_certificate_type_get\
372
 
            (session._c_object) \
373
 
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
593
    if (gnutls.library.functions
 
594
        .gnutls_certificate_type_get(session._c_object)
 
595
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
374
596
        # ...do the normal thing
375
597
        return session.peer_certificate
376
 
    list_size = ctypes.c_uint()
377
 
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
378
 
        (session._c_object, ctypes.byref(list_size))
 
598
    list_size = ctypes.c_uint(1)
 
599
    cert_list = (gnutls.library.functions
 
600
                 .gnutls_certificate_get_peers
 
601
                 (session._c_object, ctypes.byref(list_size)))
 
602
    if not bool(cert_list) and list_size.value != 0:
 
603
        raise gnutls.errors.GNUTLSError("error getting peer"
 
604
                                        " certificate")
379
605
    if list_size.value == 0:
380
606
        return None
381
607
    cert = cert_list[0]
385
611
def fingerprint(openpgp):
386
612
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
387
613
    # New GnuTLS "datum" with the OpenPGP public key
388
 
    datum = gnutls.library.types.gnutls_datum_t\
389
 
        (ctypes.cast(ctypes.c_char_p(openpgp),
390
 
                     ctypes.POINTER(ctypes.c_ubyte)),
391
 
         ctypes.c_uint(len(openpgp)))
 
614
    datum = (gnutls.library.types
 
615
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
616
                                         ctypes.POINTER
 
617
                                         (ctypes.c_ubyte)),
 
618
                             ctypes.c_uint(len(openpgp))))
392
619
    # New empty GnuTLS certificate
393
620
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
394
 
    gnutls.library.functions.gnutls_openpgp_crt_init\
395
 
        (ctypes.byref(crt))
 
621
    (gnutls.library.functions
 
622
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
396
623
    # Import the OpenPGP public key into the certificate
397
 
    gnutls.library.functions.gnutls_openpgp_crt_import\
398
 
                    (crt, ctypes.byref(datum),
399
 
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
624
    (gnutls.library.functions
 
625
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
626
                                gnutls.library.constants
 
627
                                .GNUTLS_OPENPGP_FMT_RAW))
 
628
    # Verify the self signature in the key
 
629
    crtverify = ctypes.c_uint()
 
630
    (gnutls.library.functions
 
631
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
 
632
    if crtverify.value != 0:
 
633
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
634
        raise gnutls.errors.CertificateSecurityError("Verify failed")
400
635
    # New buffer for the fingerprint
401
 
    buffer = ctypes.create_string_buffer(20)
402
 
    buffer_length = ctypes.c_size_t()
 
636
    buf = ctypes.create_string_buffer(20)
 
637
    buf_len = ctypes.c_size_t()
403
638
    # Get the fingerprint from the certificate into the buffer
404
 
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
405
 
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
639
    (gnutls.library.functions
 
640
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
641
                                         ctypes.byref(buf_len)))
406
642
    # Deinit the certificate
407
643
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
408
644
    # Convert the buffer to a Python bytestring
409
 
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
645
    fpr = ctypes.string_at(buf, buf_len.value)
410
646
    # Convert the bytestring to hexadecimal notation
411
647
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
412
648
    return hex_fpr
413
649
 
414
650
 
415
 
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
651
class TCP_handler(SocketServer.BaseRequestHandler, object):
416
652
    """A TCP request handler class.
417
653
    Instantiated by IPv6_TCPServer for each request to handle it.
418
654
    Note: This will run in its own forked process."""
419
655
    
420
656
    def handle(self):
421
657
        logger.info(u"TCP connection from: %s",
422
 
                     unicode(self.client_address))
423
 
        session = gnutls.connection.ClientSession\
424
 
                  (self.request, gnutls.connection.X509Credentials())
 
658
                    unicode(self.client_address))
 
659
        session = (gnutls.connection
 
660
                   .ClientSession(self.request,
 
661
                                  gnutls.connection
 
662
                                  .X509Credentials()))
425
663
        
426
664
        line = self.request.makefile().readline()
427
665
        logger.debug(u"Protocol version: %r", line)
440
678
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
441
679
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
442
680
        #                "+DHE-DSS"))
443
 
        priority = "NORMAL"             # Fallback default, since this
444
 
                                        # MUST be set.
445
 
        if self.server.settings["priority"]:
446
 
            priority = self.server.settings["priority"]
447
 
        gnutls.library.functions.gnutls_priority_set_direct\
448
 
            (session._c_object, priority, None);
 
681
        # Use a fallback default, since this MUST be set.
 
682
        priority = self.server.settings.get("priority", "NORMAL")
 
683
        (gnutls.library.functions
 
684
         .gnutls_priority_set_direct(session._c_object,
 
685
                                     priority, None))
449
686
        
450
687
        try:
451
688
            session.handshake()
454
691
            # Do not run session.bye() here: the session is not
455
692
            # established.  Just abandon the request.
456
693
            return
 
694
        logger.debug(u"Handshake succeeded")
457
695
        try:
458
696
            fpr = fingerprint(peer_certificate(session))
459
697
        except (TypeError, gnutls.errors.GNUTLSError), error:
461
699
            session.bye()
462
700
            return
463
701
        logger.debug(u"Fingerprint: %s", fpr)
464
 
        client = None
 
702
        
465
703
        for c in self.server.clients:
466
704
            if c.fingerprint == fpr:
467
705
                client = c
468
706
                break
469
 
        if not client:
 
707
        else:
470
708
            logger.warning(u"Client not found for fingerprint: %s",
471
709
                           fpr)
472
710
            session.bye()
479
717
                           vars(client))
480
718
            session.bye()
481
719
            return
 
720
        ## This won't work here, since we're in a fork.
 
721
        # client.checked_ok()
482
722
        sent_size = 0
483
723
        while sent_size < len(client.secret):
484
724
            sent = session.send(client.secret[sent_size:])
489
729
        session.bye()
490
730
 
491
731
 
492
 
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
732
class IPv6_TCPServer(SocketServer.ForkingMixIn,
 
733
                     SocketServer.TCPServer, object):
493
734
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
494
735
    Attributes:
495
736
        settings:       Server settings
496
737
        clients:        Set() of Client objects
 
738
        enabled:        Boolean; whether this server is activated yet
497
739
    """
498
740
    address_family = socket.AF_INET6
499
741
    def __init__(self, *args, **kwargs):
503
745
        if "clients" in kwargs:
504
746
            self.clients = kwargs["clients"]
505
747
            del kwargs["clients"]
506
 
        return super(type(self), self).__init__(*args, **kwargs)
 
748
        self.enabled = False
 
749
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
507
750
    def server_bind(self):
508
751
        """This overrides the normal server_bind() function
509
752
        to bind to an interface if one was specified, and also NOT to
528
771
                in6addr_any = "::"
529
772
                self.server_address = (in6addr_any,
530
773
                                       self.server_address[1])
531
 
            elif self.server_address[1] is None:
 
774
            elif not self.server_address[1]:
532
775
                self.server_address = (self.server_address[0],
533
776
                                       0)
534
 
            return super(type(self), self).server_bind()
 
777
#                 if self.settings["interface"]:
 
778
#                     self.server_address = (self.server_address[0],
 
779
#                                            0, # port
 
780
#                                            0, # flowinfo
 
781
#                                            if_nametoindex
 
782
#                                            (self.settings
 
783
#                                             ["interface"]))
 
784
            return super(IPv6_TCPServer, self).server_bind()
 
785
    def server_activate(self):
 
786
        if self.enabled:
 
787
            return super(IPv6_TCPServer, self).server_activate()
 
788
    def enable(self):
 
789
        self.enabled = True
535
790
 
536
791
 
537
792
def string_to_delta(interval):
538
793
    """Parse a string and return a datetime.timedelta
539
 
 
 
794
    
540
795
    >>> string_to_delta('7d')
541
796
    datetime.timedelta(7)
542
797
    >>> string_to_delta('60s')
547
802
    datetime.timedelta(1)
548
803
    >>> string_to_delta(u'1w')
549
804
    datetime.timedelta(7)
 
805
    >>> string_to_delta('5m 30s')
 
806
    datetime.timedelta(0, 330)
550
807
    """
551
 
    try:
552
 
        suffix=unicode(interval[-1])
553
 
        value=int(interval[:-1])
554
 
        if suffix == u"d":
555
 
            delta = datetime.timedelta(value)
556
 
        elif suffix == u"s":
557
 
            delta = datetime.timedelta(0, value)
558
 
        elif suffix == u"m":
559
 
            delta = datetime.timedelta(0, 0, 0, 0, value)
560
 
        elif suffix == u"h":
561
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
562
 
        elif suffix == u"w":
563
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
564
 
        else:
 
808
    timevalue = datetime.timedelta(0)
 
809
    for s in interval.split():
 
810
        try:
 
811
            suffix = unicode(s[-1])
 
812
            value = int(s[:-1])
 
813
            if suffix == u"d":
 
814
                delta = datetime.timedelta(value)
 
815
            elif suffix == u"s":
 
816
                delta = datetime.timedelta(0, value)
 
817
            elif suffix == u"m":
 
818
                delta = datetime.timedelta(0, 0, 0, 0, value)
 
819
            elif suffix == u"h":
 
820
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
821
            elif suffix == u"w":
 
822
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
823
            else:
 
824
                raise ValueError
 
825
        except (ValueError, IndexError):
565
826
            raise ValueError
566
 
    except (ValueError, IndexError):
567
 
        raise ValueError
568
 
    return delta
 
827
        timevalue += delta
 
828
    return timevalue
569
829
 
570
830
 
571
831
def server_state_changed(state):
572
832
    """Derived from the Avahi example code"""
573
833
    if state == avahi.SERVER_COLLISION:
574
 
        logger.error(u"Server name collision")
 
834
        logger.error(u"Zeroconf server name collision")
575
835
        service.remove()
576
836
    elif state == avahi.SERVER_RUNNING:
577
837
        service.add()
579
839
 
580
840
def entry_group_state_changed(state, error):
581
841
    """Derived from the Avahi example code"""
582
 
    logger.debug(u"state change: %i", state)
 
842
    logger.debug(u"Avahi state change: %i", state)
583
843
    
584
844
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
585
 
        logger.debug(u"Service established.")
 
845
        logger.debug(u"Zeroconf service established.")
586
846
    elif state == avahi.ENTRY_GROUP_COLLISION:
587
 
        logger.warning(u"Service name collision.")
 
847
        logger.warning(u"Zeroconf service name collision.")
588
848
        service.rename()
589
849
    elif state == avahi.ENTRY_GROUP_FAILURE:
590
 
        logger.critical(u"Error in group state changed %s",
 
850
        logger.critical(u"Avahi: Error in group state changed %s",
591
851
                        unicode(error))
592
 
        raise AvahiGroupError("State changed: %s", str(error))
 
852
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
593
853
 
594
854
def if_nametoindex(interface):
595
855
    """Call the C function if_nametoindex(), or equivalent"""
596
856
    global if_nametoindex
597
857
    try:
598
 
        if "ctypes.util" not in sys.modules:
599
 
            import ctypes.util
600
 
        if_nametoindex = ctypes.cdll.LoadLibrary\
601
 
            (ctypes.util.find_library("c")).if_nametoindex
 
858
        if_nametoindex = (ctypes.cdll.LoadLibrary
 
859
                          (ctypes.util.find_library("c"))
 
860
                          .if_nametoindex)
602
861
    except (OSError, AttributeError):
603
862
        if "struct" not in sys.modules:
604
863
            import struct
607
866
        def if_nametoindex(interface):
608
867
            "Get an interface index the hard way, i.e. using fcntl()"
609
868
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
610
 
            s = socket.socket()
611
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
612
 
                                struct.pack("16s16x", interface))
613
 
            s.close()
 
869
            with closing(socket.socket()) as s:
 
870
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
871
                                    struct.pack("16s16x", interface))
614
872
            interface_index = struct.unpack("I", ifreq[16:20])[0]
615
873
            return interface_index
616
874
    return if_nametoindex(interface)
640
898
 
641
899
 
642
900
def main():
643
 
    global main_loop_started
644
 
    main_loop_started = False
645
 
    
646
 
    parser = OptionParser()
 
901
    parser = optparse.OptionParser(version = "%%prog %s" % version)
647
902
    parser.add_option("-i", "--interface", type="string",
648
903
                      metavar="IF", help="Bind to interface IF")
649
904
    parser.add_option("-a", "--address", type="string",
650
905
                      help="Address to listen for requests on")
651
906
    parser.add_option("-p", "--port", type="int",
652
907
                      help="Port number to receive requests on")
653
 
    parser.add_option("--check", action="store_true", default=False,
 
908
    parser.add_option("--check", action="store_true",
654
909
                      help="Run self-test")
655
 
    parser.add_option("--debug", action="store_true", default=False,
 
910
    parser.add_option("--debug", action="store_true",
656
911
                      help="Debug mode; run in foreground and log to"
657
912
                      " terminal")
658
913
    parser.add_option("--priority", type="string", help="GnuTLS"
663
918
                      default="/etc/mandos", metavar="DIR",
664
919
                      help="Directory to search for configuration"
665
920
                      " files")
666
 
    (options, args) = parser.parse_args()
 
921
    parser.add_option("--no-dbus", action="store_false",
 
922
                      dest="use_dbus",
 
923
                      help="Do not provide D-Bus system bus"
 
924
                      " interface")
 
925
    options = parser.parse_args()[0]
667
926
    
668
927
    if options.check:
669
928
        import doctest
678
937
                        "priority":
679
938
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
680
939
                        "servicename": "Mandos",
 
940
                        "use_dbus": "True",
681
941
                        }
682
942
    
683
943
    # Parse config file for server-global settings
684
944
    server_config = ConfigParser.SafeConfigParser(server_defaults)
685
945
    del server_defaults
686
946
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
687
 
    server_section = "server"
688
947
    # Convert the SafeConfigParser object to a dict
689
 
    server_settings = dict(server_config.items(server_section))
690
 
    # Use getboolean on the boolean config option
691
 
    server_settings["debug"] = server_config.getboolean\
692
 
                               (server_section, "debug")
 
948
    server_settings = server_config.defaults()
 
949
    # Use the appropriate methods on the non-string config options
 
950
    server_settings["debug"] = server_config.getboolean("DEFAULT",
 
951
                                                        "debug")
 
952
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
 
953
                                                           "use_dbus")
 
954
    if server_settings["port"]:
 
955
        server_settings["port"] = server_config.getint("DEFAULT",
 
956
                                                       "port")
693
957
    del server_config
694
958
    
695
959
    # Override the settings from the config file with command line
696
960
    # options, if set.
697
961
    for option in ("interface", "address", "port", "debug",
698
 
                   "priority", "servicename", "configdir"):
 
962
                   "priority", "servicename", "configdir",
 
963
                   "use_dbus"):
699
964
        value = getattr(options, option)
700
965
        if value is not None:
701
966
            server_settings[option] = value
702
967
    del options
703
968
    # Now we have our good server settings in "server_settings"
704
969
    
 
970
    # For convenience
 
971
    debug = server_settings["debug"]
 
972
    use_dbus = server_settings["use_dbus"]
 
973
 
 
974
    def sigsegvhandler(signum, frame):
 
975
        raise RuntimeError('Segmentation fault')
 
976
    
 
977
    if not debug:
 
978
        syslogger.setLevel(logging.WARNING)
 
979
        console.setLevel(logging.WARNING)
 
980
    else:
 
981
        signal.signal(signal.SIGSEGV, sigsegvhandler)
 
982
    
 
983
    if server_settings["servicename"] != "Mandos":
 
984
        syslogger.setFormatter(logging.Formatter
 
985
                               ('Mandos (%s): %%(levelname)s:'
 
986
                                ' %%(message)s'
 
987
                                % server_settings["servicename"]))
 
988
    
705
989
    # Parse config file with clients
706
990
    client_defaults = { "timeout": "1h",
707
991
                        "interval": "5m",
708
 
                        "checker": "fping -q -- %%(fqdn)s",
 
992
                        "checker": "fping -q -- %%(host)s",
 
993
                        "host": "",
709
994
                        }
710
995
    client_config = ConfigParser.SafeConfigParser(client_defaults)
711
996
    client_config.read(os.path.join(server_settings["configdir"],
712
997
                                    "clients.conf"))
713
998
    
 
999
    clients = Set()
 
1000
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
1001
                                 server_settings["port"]),
 
1002
                                TCP_handler,
 
1003
                                settings=server_settings,
 
1004
                                clients=clients)
 
1005
    pidfilename = "/var/run/mandos.pid"
 
1006
    try:
 
1007
        pidfile = open(pidfilename, "w")
 
1008
    except IOError, error:
 
1009
        logger.error("Could not open file %r", pidfilename)
 
1010
    
 
1011
    try:
 
1012
        uid = pwd.getpwnam("_mandos").pw_uid
 
1013
        gid = pwd.getpwnam("_mandos").pw_gid
 
1014
    except KeyError:
 
1015
        try:
 
1016
            uid = pwd.getpwnam("mandos").pw_uid
 
1017
            gid = pwd.getpwnam("mandos").pw_gid
 
1018
        except KeyError:
 
1019
            try:
 
1020
                uid = pwd.getpwnam("nobody").pw_uid
 
1021
                gid = pwd.getpwnam("nogroup").pw_gid
 
1022
            except KeyError:
 
1023
                uid = 65534
 
1024
                gid = 65534
 
1025
    try:
 
1026
        os.setgid(gid)
 
1027
        os.setuid(uid)
 
1028
    except OSError, error:
 
1029
        if error[0] != errno.EPERM:
 
1030
            raise error
 
1031
    
 
1032
    # Enable all possible GnuTLS debugging
 
1033
    if debug:
 
1034
        # "Use a log level over 10 to enable all debugging options."
 
1035
        # - GnuTLS manual
 
1036
        gnutls.library.functions.gnutls_global_set_log_level(11)
 
1037
        
 
1038
        @gnutls.library.types.gnutls_log_func
 
1039
        def debug_gnutls(level, string):
 
1040
            logger.debug("GnuTLS: %s", string[:-1])
 
1041
        
 
1042
        (gnutls.library.functions
 
1043
         .gnutls_global_set_log_function(debug_gnutls))
 
1044
    
714
1045
    global service
715
1046
    service = AvahiService(name = server_settings["servicename"],
716
 
                           type = "_mandos._tcp", );
 
1047
                           servicetype = "_mandos._tcp", )
717
1048
    if server_settings["interface"]:
718
 
        service.interface = if_nametoindex(server_settings["interface"])
 
1049
        service.interface = (if_nametoindex
 
1050
                             (server_settings["interface"]))
719
1051
    
720
1052
    global main_loop
721
1053
    global bus
724
1056
    DBusGMainLoop(set_as_default=True )
725
1057
    main_loop = gobject.MainLoop()
726
1058
    bus = dbus.SystemBus()
727
 
    server = dbus.Interface(
728
 
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
729
 
            avahi.DBUS_INTERFACE_SERVER )
 
1059
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
1060
                                           avahi.DBUS_PATH_SERVER),
 
1061
                            avahi.DBUS_INTERFACE_SERVER)
730
1062
    # End of Avahi example code
731
 
    
732
 
    debug = server_settings["debug"]
733
 
    
734
 
    if debug:
735
 
        console = logging.StreamHandler()
736
 
        # console.setLevel(logging.DEBUG)
737
 
        console.setFormatter(logging.Formatter\
738
 
                             ('%(levelname)s: %(message)s'))
739
 
        logger.addHandler(console)
740
 
        del console
741
 
    
742
 
    clients = Set()
743
 
    def remove_from_clients(client):
744
 
        clients.remove(client)
745
 
        if not clients:
746
 
            logger.critical(u"No clients left, exiting")
747
 
            sys.exit()
 
1063
    if use_dbus:
 
1064
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
748
1065
    
749
1066
    clients.update(Set(Client(name = section,
750
 
                              stop_hook = remove_from_clients,
751
1067
                              config
752
 
                              = dict(client_config.items(section)))
 
1068
                              = dict(client_config.items(section)),
 
1069
                              use_dbus = use_dbus)
753
1070
                       for section in client_config.sections()))
 
1071
    if not clients:
 
1072
        logger.warning(u"No clients defined")
754
1073
    
755
 
    if not debug:
 
1074
    if debug:
 
1075
        # Redirect stdin so all checkers get /dev/null
 
1076
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
1077
        os.dup2(null, sys.stdin.fileno())
 
1078
        if null > 2:
 
1079
            os.close(null)
 
1080
    else:
 
1081
        # No console logging
 
1082
        logger.removeHandler(console)
 
1083
        # Close all input and output, do double fork, etc.
756
1084
        daemon()
757
1085
    
 
1086
    try:
 
1087
        pid = os.getpid()
 
1088
        pidfile.write(str(pid) + "\n")
 
1089
        pidfile.close()
 
1090
        del pidfile
 
1091
    except IOError:
 
1092
        logger.error(u"Could not write to file %r with PID %d",
 
1093
                     pidfilename, pid)
 
1094
    except NameError:
 
1095
        # "pidfile" was never created
 
1096
        pass
 
1097
    del pidfilename
 
1098
    
758
1099
    def cleanup():
759
1100
        "Cleanup function; run on exit"
760
1101
        global group
766
1107
        
767
1108
        while clients:
768
1109
            client = clients.pop()
769
 
            client.stop_hook = None
770
 
            client.stop()
 
1110
            client.disable_hook = None
 
1111
            client.disable()
771
1112
    
772
1113
    atexit.register(cleanup)
773
1114
    
776
1117
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
777
1118
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
778
1119
    
 
1120
    if use_dbus:
 
1121
        class MandosServer(dbus.service.Object):
 
1122
            """A D-Bus proxy object"""
 
1123
            def __init__(self):
 
1124
                dbus.service.Object.__init__(self, bus, "/")
 
1125
            _interface = u"se.bsnet.fukt.Mandos"
 
1126
            
 
1127
            @dbus.service.signal(_interface, signature="oa{sv}")
 
1128
            def ClientAdded(self, objpath, properties):
 
1129
                "D-Bus signal"
 
1130
                pass
 
1131
            
 
1132
            @dbus.service.signal(_interface, signature="os")
 
1133
            def ClientRemoved(self, objpath, name):
 
1134
                "D-Bus signal"
 
1135
                pass
 
1136
            
 
1137
            @dbus.service.method(_interface, out_signature="ao")
 
1138
            def GetAllClients(self):
 
1139
                "D-Bus method"
 
1140
                return dbus.Array(c.dbus_object_path for c in clients)
 
1141
            
 
1142
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
 
1143
            def GetAllClientsWithProperties(self):
 
1144
                "D-Bus method"
 
1145
                return dbus.Dictionary(
 
1146
                    ((c.dbus_object_path, c.GetAllProperties())
 
1147
                     for c in clients),
 
1148
                    signature="oa{sv}")
 
1149
            
 
1150
            @dbus.service.method(_interface, in_signature="o")
 
1151
            def RemoveClient(self, object_path):
 
1152
                "D-Bus method"
 
1153
                for c in clients:
 
1154
                    if c.dbus_object_path == object_path:
 
1155
                        clients.remove(c)
 
1156
                        # Don't signal anything except ClientRemoved
 
1157
                        c.use_dbus = False
 
1158
                        c.disable()
 
1159
                        # Emit D-Bus signal
 
1160
                        self.ClientRemoved(object_path, c.name)
 
1161
                        return
 
1162
                raise KeyError
 
1163
            
 
1164
            del _interface
 
1165
        
 
1166
        mandos_server = MandosServer()
 
1167
    
779
1168
    for client in clients:
780
 
        client.start()
781
 
    
782
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
783
 
                                 server_settings["port"]),
784
 
                                tcp_handler,
785
 
                                settings=server_settings,
786
 
                                clients=clients)
 
1169
        if use_dbus:
 
1170
            # Emit D-Bus signal
 
1171
            mandos_server.ClientAdded(client.dbus_object_path,
 
1172
                                      client.GetAllProperties())
 
1173
        client.enable()
 
1174
    
 
1175
    tcp_server.enable()
 
1176
    tcp_server.server_activate()
 
1177
    
787
1178
    # Find out what port we got
788
1179
    service.port = tcp_server.socket.getsockname()[1]
789
1180
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
803
1194
        
804
1195
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
805
1196
                             lambda *args, **kwargs:
806
 
                             tcp_server.handle_request\
807
 
                             (*args[2:], **kwargs) or True)
 
1197
                             (tcp_server.handle_request
 
1198
                              (*args[2:], **kwargs) or True))
808
1199
        
809
 
        logger.debug("Starting main loop")
810
 
        main_loop_started = True
 
1200
        logger.debug(u"Starting main loop")
811
1201
        main_loop.run()
812
1202
    except AvahiError, error:
813
 
        logger.critical(u"AvahiError: %s" + unicode(error))
 
1203
        logger.critical(u"AvahiError: %s", error)
814
1204
        sys.exit(1)
815
1205
    except KeyboardInterrupt:
816
1206
        if debug: