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  • Committer: Teddy Hogeborn
  • Date: 2009-02-07 04:50:39 UTC
  • Revision ID: teddy@fukt.bsnet.se-20090207045039-xkr6b80vtqwqrq8l
* Makefile (install-client-nokey): Move "initramfs-tools-script" from
                                   "/scripts/local-top/mandos" to
                                   "/scripts/init-premount/mandos".
  (uninstall-client): - '' -
* debian/mandos-client.dirs: - '' -
* initramfs-tools-script (PREREQ): Added "udev".

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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 [%(process)d]: %(levelname)s:'
 
77
                        ' %(message)s'))
70
78
logger.addHandler(syslogger)
71
 
del syslogger
72
79
 
 
80
console = logging.StreamHandler()
 
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
 
82
                                       ' %(levelname)s: %(message)s'))
 
83
logger.addHandler(console)
73
84
 
74
85
class AvahiError(Exception):
75
 
    def __init__(self, value):
 
86
    def __init__(self, value, *args, **kwargs):
76
87
        self.value = value
77
 
    def __str__(self):
78
 
        return repr(self.value)
 
88
        super(AvahiError, self).__init__(value, *args, **kwargs)
 
89
    def __unicode__(self):
 
90
        return unicode(repr(self.value))
79
91
 
80
92
class AvahiServiceError(AvahiError):
81
93
    pass
101
113
                  a sensible number of times
102
114
    """
103
115
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
104
 
                 type = None, port = None, TXT = None, domain = "",
105
 
                 host = "", max_renames = 12):
 
116
                 servicetype = None, port = None, TXT = None,
 
117
                 domain = "", host = "", max_renames = 32768):
106
118
        self.interface = interface
107
119
        self.name = name
108
 
        self.type = type
 
120
        self.type = servicetype
109
121
        self.port = port
110
 
        if TXT is None:
111
 
            self.TXT = []
112
 
        else:
113
 
            self.TXT = TXT
 
122
        self.TXT = TXT if TXT is not None else []
114
123
        self.domain = domain
115
124
        self.host = host
116
125
        self.rename_count = 0
 
126
        self.max_renames = max_renames
117
127
    def rename(self):
118
128
        """Derived from the Avahi example code"""
119
129
        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)
 
130
            logger.critical(u"No suitable Zeroconf service name found"
 
131
                            u" after %i retries, exiting.",
 
132
                            self.rename_count)
 
133
            raise AvahiServiceError(u"Too many renames")
 
134
        self.name = server.GetAlternativeServiceName(self.name)
 
135
        logger.info(u"Changing Zeroconf service name to %r ...",
 
136
                    str(self.name))
 
137
        syslogger.setFormatter(logging.Formatter
 
138
                               ('Mandos (%s): %%(levelname)s:'
 
139
                                ' %%(message)s' % self.name))
125
140
        self.remove()
126
141
        self.add()
127
142
        self.rename_count += 1
133
148
        """Derived from the Avahi example code"""
134
149
        global group
135
150
        if group is None:
136
 
            group = dbus.Interface\
137
 
                    (bus.get_object(avahi.DBUS_NAME,
 
151
            group = dbus.Interface(bus.get_object
 
152
                                   (avahi.DBUS_NAME,
138
153
                                    server.EntryGroupNew()),
139
 
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
154
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
140
155
            group.connect_to_signal('StateChanged',
141
156
                                    entry_group_state_changed)
142
 
        logger.debug(u"Adding service '%s' of type '%s' ...",
 
157
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
143
158
                     service.name, service.type)
144
159
        group.AddService(
145
160
                self.interface,         # interface
156
171
# End of Avahi example code
157
172
 
158
173
 
159
 
class Client(object):
 
174
def _datetime_to_dbus(dt, variant_level=0):
 
175
    """Convert a UTC datetime.datetime() to a D-Bus type."""
 
176
    return dbus.String(dt.isoformat(), variant_level=variant_level)
 
177
 
 
178
 
 
179
class Client(dbus.service.Object):
160
180
    """A representation of a client host served by this server.
161
181
    Attributes:
162
 
    name:      string; from the config file, used in log messages
 
182
    name:       string; from the config file, used in log messages and
 
183
                        D-Bus identifiers
163
184
    fingerprint: string (40 or 32 hexadecimal digits); used to
164
185
                 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.
 
186
    secret:     bytestring; sent verbatim (over TLS) to client
 
187
    host:       string; available for use by the checker command
 
188
    created:    datetime.datetime(); (UTC) object creation
 
189
    last_enabled: datetime.datetime(); (UTC)
 
190
    enabled:    bool()
 
191
    last_checked_ok: datetime.datetime(); (UTC) or None
 
192
    timeout:    datetime.timedelta(); How long from last_checked_ok
 
193
                                      until this client is invalid
 
194
    interval:   datetime.timedelta(); How often to start a new checker
 
195
    disable_hook:  If set, called by disable() as disable_hook(self)
 
196
    checker:    subprocess.Popen(); a running checker process used
 
197
                                    to see if the client lives.
 
198
                                    'None' if no process is running.
176
199
    checker_initiator_tag: a gobject event source tag, or None
177
 
    stop_initiator_tag:    - '' -
 
200
    disable_initiator_tag:    - '' -
178
201
    checker_callback_tag:  - '' -
179
202
    checker_command: string; External command which is run to check if
180
203
                     client lives.  %() expansions are done at
181
204
                     runtime with vars(self) as dict, so that for
182
205
                     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: - '' -
 
206
    use_dbus: bool(); Whether to provide D-Bus interface and signals
 
207
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
188
208
    """
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={}):
 
209
    def timeout_milliseconds(self):
 
210
        "Return the 'timeout' attribute in milliseconds"
 
211
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
 
212
                + (self.timeout.seconds * 1000)
 
213
                + (self.timeout.microseconds // 1000))
 
214
    
 
215
    def interval_milliseconds(self):
 
216
        "Return the 'interval' attribute in milliseconds"
 
217
        return ((self.interval.days * 24 * 60 * 60 * 1000)
 
218
                + (self.interval.seconds * 1000)
 
219
                + (self.interval.microseconds // 1000))
 
220
    
 
221
    def __init__(self, name = None, disable_hook=None, config=None,
 
222
                 use_dbus=True):
213
223
        """Note: the 'checker' key in 'config' sets the
214
224
        'checker_command' attribute and *not* the 'checker'
215
225
        attribute."""
216
226
        self.name = name
 
227
        if config is None:
 
228
            config = {}
217
229
        logger.debug(u"Creating client %r", self.name)
 
230
        self.use_dbus = False   # During __init__
218
231
        # Uppercase and remove spaces from fingerprint for later
219
232
        # comparison purposes with return value from the fingerprint()
220
233
        # function
221
 
        self.fingerprint = config["fingerprint"].upper()\
222
 
                           .replace(u" ", u"")
 
234
        self.fingerprint = (config["fingerprint"].upper()
 
235
                            .replace(u" ", u""))
223
236
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
224
237
        if "secret" in config:
225
238
            self.secret = config["secret"].decode(u"base64")
226
239
        elif "secfile" in config:
227
 
            sf = open(config["secfile"])
228
 
            self.secret = sf.read()
229
 
            sf.close()
 
240
            with closing(open(os.path.expanduser
 
241
                              (os.path.expandvars
 
242
                               (config["secfile"])))) as secfile:
 
243
                self.secret = secfile.read()
230
244
        else:
231
245
            raise TypeError(u"No secret or secfile for client %s"
232
246
                            % self.name)
233
 
        self.fqdn = config.get("fqdn", "")
234
 
        self.created = datetime.datetime.now()
 
247
        self.host = config.get("host", "")
 
248
        self.created = datetime.datetime.utcnow()
 
249
        self.enabled = False
 
250
        self.last_enabled = None
235
251
        self.last_checked_ok = None
236
252
        self.timeout = string_to_delta(config["timeout"])
237
253
        self.interval = string_to_delta(config["interval"])
238
 
        self.stop_hook = stop_hook
 
254
        self.disable_hook = disable_hook
239
255
        self.checker = None
240
256
        self.checker_initiator_tag = None
241
 
        self.stop_initiator_tag = None
 
257
        self.disable_initiator_tag = None
242
258
        self.checker_callback_tag = None
243
 
        self.check_command = config["checker"]
244
 
    def start(self):
 
259
        self.checker_command = config["checker"]
 
260
        self.last_connect = None
 
261
        # Only now, when this client is initialized, can it show up on
 
262
        # the D-Bus
 
263
        self.use_dbus = use_dbus
 
264
        if self.use_dbus:
 
265
            self.dbus_object_path = (dbus.ObjectPath
 
266
                                     ("/clients/"
 
267
                                      + self.name.replace(".", "_")))
 
268
            dbus.service.Object.__init__(self, bus,
 
269
                                         self.dbus_object_path)
 
270
    
 
271
    def enable(self):
245
272
        """Start this client's checker and timeout hooks"""
 
273
        self.last_enabled = datetime.datetime.utcnow()
246
274
        # Schedule a new checker to be started an 'interval' from now,
247
275
        # and every interval from then on.
248
 
        self.checker_initiator_tag = gobject.timeout_add\
249
 
                                     (self._interval_milliseconds,
250
 
                                      self.start_checker)
 
276
        self.checker_initiator_tag = (gobject.timeout_add
 
277
                                      (self.interval_milliseconds(),
 
278
                                       self.start_checker))
251
279
        # Also start a new checker *right now*.
252
280
        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:
 
281
        # Schedule a disable() when 'timeout' has passed
 
282
        self.disable_initiator_tag = (gobject.timeout_add
 
283
                                   (self.timeout_milliseconds(),
 
284
                                    self.disable))
 
285
        self.enabled = True
 
286
        if self.use_dbus:
 
287
            # Emit D-Bus signals
 
288
            self.PropertyChanged(dbus.String(u"enabled"),
 
289
                                 dbus.Boolean(True, variant_level=1))
 
290
            self.PropertyChanged(dbus.String(u"last_enabled"),
 
291
                                 (_datetime_to_dbus(self.last_enabled,
 
292
                                                    variant_level=1)))
 
293
    
 
294
    def disable(self):
 
295
        """Disable this client."""
 
296
        if not getattr(self, "enabled", False):
266
297
            return False
267
 
        if getattr(self, "stop_initiator_tag", False):
268
 
            gobject.source_remove(self.stop_initiator_tag)
269
 
            self.stop_initiator_tag = None
 
298
        logger.info(u"Disabling client %s", self.name)
 
299
        if getattr(self, "disable_initiator_tag", False):
 
300
            gobject.source_remove(self.disable_initiator_tag)
 
301
            self.disable_initiator_tag = None
270
302
        if getattr(self, "checker_initiator_tag", False):
271
303
            gobject.source_remove(self.checker_initiator_tag)
272
304
            self.checker_initiator_tag = None
273
305
        self.stop_checker()
274
 
        if self.stop_hook:
275
 
            self.stop_hook(self)
 
306
        if self.disable_hook:
 
307
            self.disable_hook(self)
 
308
        self.enabled = False
 
309
        if self.use_dbus:
 
310
            # Emit D-Bus signal
 
311
            self.PropertyChanged(dbus.String(u"enabled"),
 
312
                                 dbus.Boolean(False, variant_level=1))
276
313
        # Do not run this again if called by a gobject.timeout_add
277
314
        return False
 
315
    
278
316
    def __del__(self):
279
 
        self.stop_hook = None
280
 
        self.stop()
281
 
    def checker_callback(self, pid, condition):
 
317
        self.disable_hook = None
 
318
        self.disable()
 
319
    
 
320
    def checker_callback(self, pid, condition, command):
282
321
        """The checker has completed, so take appropriate actions."""
283
 
        now = datetime.datetime.now()
284
322
        self.checker_callback_tag = None
285
323
        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):
 
324
        if self.use_dbus:
 
325
            # Emit D-Bus signal
 
326
            self.PropertyChanged(dbus.String(u"checker_running"),
 
327
                                 dbus.Boolean(False, variant_level=1))
 
328
        if os.WIFEXITED(condition):
 
329
            exitstatus = os.WEXITSTATUS(condition)
 
330
            if exitstatus == 0:
 
331
                logger.info(u"Checker for %(name)s succeeded",
 
332
                            vars(self))
 
333
                self.checked_ok()
 
334
            else:
 
335
                logger.info(u"Checker for %(name)s failed",
 
336
                            vars(self))
 
337
            if self.use_dbus:
 
338
                # Emit D-Bus signal
 
339
                self.CheckerCompleted(dbus.Int16(exitstatus),
 
340
                                      dbus.Int64(condition),
 
341
                                      dbus.String(command))
 
342
        else:
296
343
            logger.warning(u"Checker for %(name)s crashed?",
297
344
                           vars(self))
298
 
        else:
299
 
            logger.info(u"Checker for %(name)s failed",
300
 
                        vars(self))
 
345
            if self.use_dbus:
 
346
                # Emit D-Bus signal
 
347
                self.CheckerCompleted(dbus.Int16(-1),
 
348
                                      dbus.Int64(condition),
 
349
                                      dbus.String(command))
 
350
    
 
351
    def checked_ok(self):
 
352
        """Bump up the timeout for this client.
 
353
        This should only be called when the client has been seen,
 
354
        alive and well.
 
355
        """
 
356
        self.last_checked_ok = datetime.datetime.utcnow()
 
357
        gobject.source_remove(self.disable_initiator_tag)
 
358
        self.disable_initiator_tag = (gobject.timeout_add
 
359
                                      (self.timeout_milliseconds(),
 
360
                                       self.disable))
 
361
        if self.use_dbus:
 
362
            # Emit D-Bus signal
 
363
            self.PropertyChanged(
 
364
                dbus.String(u"last_checked_ok"),
 
365
                (_datetime_to_dbus(self.last_checked_ok,
 
366
                                   variant_level=1)))
 
367
    
301
368
    def start_checker(self):
302
369
        """Start a new checker subprocess if one is not running.
303
370
        If a checker already exists, leave it running and do
312
379
        # is as it should be.
313
380
        if self.checker is None:
314
381
            try:
315
 
                # In case check_command has exactly one % operator
316
 
                command = self.check_command % self.fqdn
 
382
                # In case checker_command has exactly one % operator
 
383
                command = self.checker_command % self.host
317
384
            except TypeError:
318
385
                # Escape attributes for the shell
319
386
                escaped_attrs = dict((key, re.escape(str(val)))
320
387
                                     for key, val in
321
388
                                     vars(self).iteritems())
322
389
                try:
323
 
                    command = self.check_command % escaped_attrs
 
390
                    command = self.checker_command % escaped_attrs
324
391
                except TypeError, error:
325
392
                    logger.error(u'Could not format string "%s":'
326
 
                                 u' %s', self.check_command, error)
 
393
                                 u' %s', self.checker_command, error)
327
394
                    return True # Try again later
328
395
            try:
329
396
                logger.info(u"Starting checker %r for %s",
330
397
                            command, self.name)
 
398
                # We don't need to redirect stdout and stderr, since
 
399
                # in normal mode, that is already done by daemon(),
 
400
                # and in debug mode we don't want to.  (Stdin is
 
401
                # always replaced by /dev/null.)
331
402
                self.checker = subprocess.Popen(command,
332
403
                                                close_fds=True,
333
404
                                                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:
 
405
                if self.use_dbus:
 
406
                    # Emit D-Bus signal
 
407
                    self.CheckerStarted(command)
 
408
                    self.PropertyChanged(
 
409
                        dbus.String("checker_running"),
 
410
                        dbus.Boolean(True, variant_level=1))
 
411
                self.checker_callback_tag = (gobject.child_watch_add
 
412
                                             (self.checker.pid,
 
413
                                              self.checker_callback,
 
414
                                              data=command))
 
415
            except OSError, error:
338
416
                logger.error(u"Failed to start subprocess: %s",
339
417
                             error)
340
418
        # Re-run this periodically if run by gobject.timeout_add
341
419
        return True
 
420
    
342
421
    def stop_checker(self):
343
422
        """Force the checker process, if any, to stop."""
344
423
        if self.checker_callback_tag:
346
425
            self.checker_callback_tag = None
347
426
        if getattr(self, "checker", None) is None:
348
427
            return
349
 
        logger.debug("Stopping checker for %(name)s", vars(self))
 
428
        logger.debug(u"Stopping checker for %(name)s", vars(self))
350
429
        try:
351
430
            os.kill(self.checker.pid, signal.SIGTERM)
352
431
            #os.sleep(0.5)
356
435
            if error.errno != errno.ESRCH: # No such process
357
436
                raise
358
437
        self.checker = None
 
438
        if self.use_dbus:
 
439
            self.PropertyChanged(dbus.String(u"checker_running"),
 
440
                                 dbus.Boolean(False, variant_level=1))
 
441
    
359
442
    def still_valid(self):
360
443
        """Has the timeout not yet passed for this client?"""
361
 
        now = datetime.datetime.now()
 
444
        if not getattr(self, "enabled", False):
 
445
            return False
 
446
        now = datetime.datetime.utcnow()
362
447
        if self.last_checked_ok is None:
363
448
            return now < (self.created + self.timeout)
364
449
        else:
365
450
            return now < (self.last_checked_ok + self.timeout)
 
451
    
 
452
    ## D-Bus methods & signals
 
453
    _interface = u"se.bsnet.fukt.Mandos.Client"
 
454
    
 
455
    # CheckedOK - method
 
456
    CheckedOK = dbus.service.method(_interface)(checked_ok)
 
457
    CheckedOK.__name__ = "CheckedOK"
 
458
    
 
459
    # CheckerCompleted - signal
 
460
    @dbus.service.signal(_interface, signature="nxs")
 
461
    def CheckerCompleted(self, exitcode, waitstatus, command):
 
462
        "D-Bus signal"
 
463
        pass
 
464
    
 
465
    # CheckerStarted - signal
 
466
    @dbus.service.signal(_interface, signature="s")
 
467
    def CheckerStarted(self, command):
 
468
        "D-Bus signal"
 
469
        pass
 
470
    
 
471
    # GetAllProperties - method
 
472
    @dbus.service.method(_interface, out_signature="a{sv}")
 
473
    def GetAllProperties(self):
 
474
        "D-Bus method"
 
475
        return dbus.Dictionary({
 
476
                dbus.String("name"):
 
477
                    dbus.String(self.name, variant_level=1),
 
478
                dbus.String("fingerprint"):
 
479
                    dbus.String(self.fingerprint, variant_level=1),
 
480
                dbus.String("host"):
 
481
                    dbus.String(self.host, variant_level=1),
 
482
                dbus.String("created"):
 
483
                    _datetime_to_dbus(self.created, variant_level=1),
 
484
                dbus.String("last_enabled"):
 
485
                    (_datetime_to_dbus(self.last_enabled,
 
486
                                       variant_level=1)
 
487
                     if self.last_enabled is not None
 
488
                     else dbus.Boolean(False, variant_level=1)),
 
489
                dbus.String("enabled"):
 
490
                    dbus.Boolean(self.enabled, variant_level=1),
 
491
                dbus.String("last_checked_ok"):
 
492
                    (_datetime_to_dbus(self.last_checked_ok,
 
493
                                       variant_level=1)
 
494
                     if self.last_checked_ok is not None
 
495
                     else dbus.Boolean (False, variant_level=1)),
 
496
                dbus.String("timeout"):
 
497
                    dbus.UInt64(self.timeout_milliseconds(),
 
498
                                variant_level=1),
 
499
                dbus.String("interval"):
 
500
                    dbus.UInt64(self.interval_milliseconds(),
 
501
                                variant_level=1),
 
502
                dbus.String("checker"):
 
503
                    dbus.String(self.checker_command,
 
504
                                variant_level=1),
 
505
                dbus.String("checker_running"):
 
506
                    dbus.Boolean(self.checker is not None,
 
507
                                 variant_level=1),
 
508
                dbus.String("object_path"):
 
509
                    dbus.ObjectPath(self.dbus_object_path,
 
510
                                    variant_level=1)
 
511
                }, signature="sv")
 
512
    
 
513
    # IsStillValid - method
 
514
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
 
515
                    (still_valid))
 
516
    IsStillValid.__name__ = "IsStillValid"
 
517
    
 
518
    # PropertyChanged - signal
 
519
    @dbus.service.signal(_interface, signature="sv")
 
520
    def PropertyChanged(self, property, value):
 
521
        "D-Bus signal"
 
522
        pass
 
523
    
 
524
    # SetChecker - method
 
525
    @dbus.service.method(_interface, in_signature="s")
 
526
    def SetChecker(self, checker):
 
527
        "D-Bus setter method"
 
528
        self.checker_command = checker
 
529
        # Emit D-Bus signal
 
530
        self.PropertyChanged(dbus.String(u"checker"),
 
531
                             dbus.String(self.checker_command,
 
532
                                         variant_level=1))
 
533
    
 
534
    # SetHost - method
 
535
    @dbus.service.method(_interface, in_signature="s")
 
536
    def SetHost(self, host):
 
537
        "D-Bus setter method"
 
538
        self.host = host
 
539
        # Emit D-Bus signal
 
540
        self.PropertyChanged(dbus.String(u"host"),
 
541
                             dbus.String(self.host, variant_level=1))
 
542
    
 
543
    # SetInterval - method
 
544
    @dbus.service.method(_interface, in_signature="t")
 
545
    def SetInterval(self, milliseconds):
 
546
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
 
547
        # Emit D-Bus signal
 
548
        self.PropertyChanged(dbus.String(u"interval"),
 
549
                             (dbus.UInt64(self.interval_milliseconds(),
 
550
                                          variant_level=1)))
 
551
    
 
552
    # SetSecret - method
 
553
    @dbus.service.method(_interface, in_signature="ay",
 
554
                         byte_arrays=True)
 
555
    def SetSecret(self, secret):
 
556
        "D-Bus setter method"
 
557
        self.secret = str(secret)
 
558
    
 
559
    # SetTimeout - method
 
560
    @dbus.service.method(_interface, in_signature="t")
 
561
    def SetTimeout(self, milliseconds):
 
562
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
 
563
        # Emit D-Bus signal
 
564
        self.PropertyChanged(dbus.String(u"timeout"),
 
565
                             (dbus.UInt64(self.timeout_milliseconds(),
 
566
                                          variant_level=1)))
 
567
    
 
568
    # Enable - method
 
569
    Enable = dbus.service.method(_interface)(enable)
 
570
    Enable.__name__ = "Enable"
 
571
    
 
572
    # StartChecker - method
 
573
    @dbus.service.method(_interface)
 
574
    def StartChecker(self):
 
575
        "D-Bus method"
 
576
        self.start_checker()
 
577
    
 
578
    # Disable - method
 
579
    @dbus.service.method(_interface)
 
580
    def Disable(self):
 
581
        "D-Bus method"
 
582
        self.disable()
 
583
    
 
584
    # StopChecker - method
 
585
    StopChecker = dbus.service.method(_interface)(stop_checker)
 
586
    StopChecker.__name__ = "StopChecker"
 
587
    
 
588
    del _interface
366
589
 
367
590
 
368
591
def peer_certificate(session):
369
592
    "Return the peer's OpenPGP certificate as a bytestring"
370
593
    # 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:
 
594
    if (gnutls.library.functions
 
595
        .gnutls_certificate_type_get(session._c_object)
 
596
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
374
597
        # ...do the normal thing
375
598
        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))
 
599
    list_size = ctypes.c_uint(1)
 
600
    cert_list = (gnutls.library.functions
 
601
                 .gnutls_certificate_get_peers
 
602
                 (session._c_object, ctypes.byref(list_size)))
 
603
    if not bool(cert_list) and list_size.value != 0:
 
604
        raise gnutls.errors.GNUTLSError("error getting peer"
 
605
                                        " certificate")
379
606
    if list_size.value == 0:
380
607
        return None
381
608
    cert = cert_list[0]
385
612
def fingerprint(openpgp):
386
613
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
387
614
    # 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)))
 
615
    datum = (gnutls.library.types
 
616
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
617
                                         ctypes.POINTER
 
618
                                         (ctypes.c_ubyte)),
 
619
                             ctypes.c_uint(len(openpgp))))
392
620
    # New empty GnuTLS certificate
393
621
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
394
 
    gnutls.library.functions.gnutls_openpgp_crt_init\
395
 
        (ctypes.byref(crt))
 
622
    (gnutls.library.functions
 
623
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
396
624
    # 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)
 
625
    (gnutls.library.functions
 
626
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
627
                                gnutls.library.constants
 
628
                                .GNUTLS_OPENPGP_FMT_RAW))
 
629
    # Verify the self signature in the key
 
630
    crtverify = ctypes.c_uint()
 
631
    (gnutls.library.functions
 
632
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
 
633
    if crtverify.value != 0:
 
634
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
635
        raise gnutls.errors.CertificateSecurityError("Verify failed")
400
636
    # New buffer for the fingerprint
401
 
    buffer = ctypes.create_string_buffer(20)
402
 
    buffer_length = ctypes.c_size_t()
 
637
    buf = ctypes.create_string_buffer(20)
 
638
    buf_len = ctypes.c_size_t()
403
639
    # 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))
 
640
    (gnutls.library.functions
 
641
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
642
                                         ctypes.byref(buf_len)))
406
643
    # Deinit the certificate
407
644
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
408
645
    # Convert the buffer to a Python bytestring
409
 
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
646
    fpr = ctypes.string_at(buf, buf_len.value)
410
647
    # Convert the bytestring to hexadecimal notation
411
648
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
412
649
    return hex_fpr
413
650
 
414
651
 
415
 
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
652
class TCP_handler(SocketServer.BaseRequestHandler, object):
416
653
    """A TCP request handler class.
417
654
    Instantiated by IPv6_TCPServer for each request to handle it.
418
655
    Note: This will run in its own forked process."""
419
656
    
420
657
    def handle(self):
421
658
        logger.info(u"TCP connection from: %s",
422
 
                     unicode(self.client_address))
423
 
        session = gnutls.connection.ClientSession\
424
 
                  (self.request, gnutls.connection.X509Credentials())
 
659
                    unicode(self.client_address))
 
660
        session = (gnutls.connection
 
661
                   .ClientSession(self.request,
 
662
                                  gnutls.connection
 
663
                                  .X509Credentials()))
425
664
        
426
665
        line = self.request.makefile().readline()
427
666
        logger.debug(u"Protocol version: %r", line)
438
677
        # using OpenPGP certificates.
439
678
        
440
679
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
441
 
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
442
 
        #                "+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);
 
680
        #                     "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
681
        #                     "+DHE-DSS"))
 
682
        # Use a fallback default, since this MUST be set.
 
683
        priority = self.server.settings.get("priority", "NORMAL")
 
684
        (gnutls.library.functions
 
685
         .gnutls_priority_set_direct(session._c_object,
 
686
                                     priority, None))
449
687
        
450
688
        try:
451
689
            session.handshake()
454
692
            # Do not run session.bye() here: the session is not
455
693
            # established.  Just abandon the request.
456
694
            return
 
695
        logger.debug(u"Handshake succeeded")
457
696
        try:
458
697
            fpr = fingerprint(peer_certificate(session))
459
698
        except (TypeError, gnutls.errors.GNUTLSError), error:
461
700
            session.bye()
462
701
            return
463
702
        logger.debug(u"Fingerprint: %s", fpr)
464
 
        client = None
 
703
        
465
704
        for c in self.server.clients:
466
705
            if c.fingerprint == fpr:
467
706
                client = c
468
707
                break
469
 
        if not client:
 
708
        else:
470
709
            logger.warning(u"Client not found for fingerprint: %s",
471
710
                           fpr)
472
711
            session.bye()
479
718
                           vars(client))
480
719
            session.bye()
481
720
            return
 
721
        ## This won't work here, since we're in a fork.
 
722
        # client.checked_ok()
482
723
        sent_size = 0
483
724
        while sent_size < len(client.secret):
484
725
            sent = session.send(client.secret[sent_size:])
489
730
        session.bye()
490
731
 
491
732
 
492
 
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
733
class IPv6_TCPServer(SocketServer.ForkingMixIn,
 
734
                     SocketServer.TCPServer, object):
493
735
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
494
736
    Attributes:
495
737
        settings:       Server settings
496
738
        clients:        Set() of Client objects
 
739
        enabled:        Boolean; whether this server is activated yet
497
740
    """
498
741
    address_family = socket.AF_INET6
499
742
    def __init__(self, *args, **kwargs):
503
746
        if "clients" in kwargs:
504
747
            self.clients = kwargs["clients"]
505
748
            del kwargs["clients"]
506
 
        return super(type(self), self).__init__(*args, **kwargs)
 
749
        self.enabled = False
 
750
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
507
751
    def server_bind(self):
508
752
        """This overrides the normal server_bind() function
509
753
        to bind to an interface if one was specified, and also NOT to
521
765
                                 u" bind to interface %s",
522
766
                                 self.settings["interface"])
523
767
                else:
524
 
                    raise error
 
768
                    raise
525
769
        # Only bind(2) the socket if we really need to.
526
770
        if self.server_address[0] or self.server_address[1]:
527
771
            if not self.server_address[0]:
538
782
#                                            if_nametoindex
539
783
#                                            (self.settings
540
784
#                                             ["interface"]))
541
 
            return super(type(self), self).server_bind()
 
785
            return super(IPv6_TCPServer, self).server_bind()
 
786
    def server_activate(self):
 
787
        if self.enabled:
 
788
            return super(IPv6_TCPServer, self).server_activate()
 
789
    def enable(self):
 
790
        self.enabled = True
542
791
 
543
792
 
544
793
def string_to_delta(interval):
545
794
    """Parse a string and return a datetime.timedelta
546
 
 
 
795
    
547
796
    >>> string_to_delta('7d')
548
797
    datetime.timedelta(7)
549
798
    >>> string_to_delta('60s')
554
803
    datetime.timedelta(1)
555
804
    >>> string_to_delta(u'1w')
556
805
    datetime.timedelta(7)
 
806
    >>> string_to_delta('5m 30s')
 
807
    datetime.timedelta(0, 330)
557
808
    """
558
 
    try:
559
 
        suffix=unicode(interval[-1])
560
 
        value=int(interval[:-1])
561
 
        if suffix == u"d":
562
 
            delta = datetime.timedelta(value)
563
 
        elif suffix == u"s":
564
 
            delta = datetime.timedelta(0, value)
565
 
        elif suffix == u"m":
566
 
            delta = datetime.timedelta(0, 0, 0, 0, value)
567
 
        elif suffix == u"h":
568
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
569
 
        elif suffix == u"w":
570
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
571
 
        else:
 
809
    timevalue = datetime.timedelta(0)
 
810
    for s in interval.split():
 
811
        try:
 
812
            suffix = unicode(s[-1])
 
813
            value = int(s[:-1])
 
814
            if suffix == u"d":
 
815
                delta = datetime.timedelta(value)
 
816
            elif suffix == u"s":
 
817
                delta = datetime.timedelta(0, value)
 
818
            elif suffix == u"m":
 
819
                delta = datetime.timedelta(0, 0, 0, 0, value)
 
820
            elif suffix == u"h":
 
821
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
822
            elif suffix == u"w":
 
823
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
824
            else:
 
825
                raise ValueError
 
826
        except (ValueError, IndexError):
572
827
            raise ValueError
573
 
    except (ValueError, IndexError):
574
 
        raise ValueError
575
 
    return delta
 
828
        timevalue += delta
 
829
    return timevalue
576
830
 
577
831
 
578
832
def server_state_changed(state):
579
833
    """Derived from the Avahi example code"""
580
834
    if state == avahi.SERVER_COLLISION:
581
 
        logger.error(u"Server name collision")
 
835
        logger.error(u"Zeroconf server name collision")
582
836
        service.remove()
583
837
    elif state == avahi.SERVER_RUNNING:
584
838
        service.add()
586
840
 
587
841
def entry_group_state_changed(state, error):
588
842
    """Derived from the Avahi example code"""
589
 
    logger.debug(u"state change: %i", state)
 
843
    logger.debug(u"Avahi state change: %i", state)
590
844
    
591
845
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
592
 
        logger.debug(u"Service established.")
 
846
        logger.debug(u"Zeroconf service established.")
593
847
    elif state == avahi.ENTRY_GROUP_COLLISION:
594
 
        logger.warning(u"Service name collision.")
 
848
        logger.warning(u"Zeroconf service name collision.")
595
849
        service.rename()
596
850
    elif state == avahi.ENTRY_GROUP_FAILURE:
597
 
        logger.critical(u"Error in group state changed %s",
 
851
        logger.critical(u"Avahi: Error in group state changed %s",
598
852
                        unicode(error))
599
 
        raise AvahiGroupError("State changed: %s", str(error))
 
853
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
600
854
 
601
855
def if_nametoindex(interface):
602
856
    """Call the C function if_nametoindex(), or equivalent"""
603
857
    global if_nametoindex
604
858
    try:
605
 
        if "ctypes.util" not in sys.modules:
606
 
            import ctypes.util
607
 
        if_nametoindex = ctypes.cdll.LoadLibrary\
608
 
            (ctypes.util.find_library("c")).if_nametoindex
 
859
        if_nametoindex = (ctypes.cdll.LoadLibrary
 
860
                          (ctypes.util.find_library("c"))
 
861
                          .if_nametoindex)
609
862
    except (OSError, AttributeError):
610
863
        if "struct" not in sys.modules:
611
864
            import struct
614
867
        def if_nametoindex(interface):
615
868
            "Get an interface index the hard way, i.e. using fcntl()"
616
869
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
617
 
            s = socket.socket()
618
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
619
 
                                struct.pack("16s16x", interface))
620
 
            s.close()
 
870
            with closing(socket.socket()) as s:
 
871
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
872
                                    struct.pack("16s16x", interface))
621
873
            interface_index = struct.unpack("I", ifreq[16:20])[0]
622
874
            return interface_index
623
875
    return if_nametoindex(interface)
647
899
 
648
900
 
649
901
def main():
650
 
    global main_loop_started
651
 
    main_loop_started = False
652
 
    
653
 
    parser = OptionParser()
 
902
    parser = optparse.OptionParser(version = "%%prog %s" % version)
654
903
    parser.add_option("-i", "--interface", type="string",
655
904
                      metavar="IF", help="Bind to interface IF")
656
905
    parser.add_option("-a", "--address", type="string",
657
906
                      help="Address to listen for requests on")
658
907
    parser.add_option("-p", "--port", type="int",
659
908
                      help="Port number to receive requests on")
660
 
    parser.add_option("--check", action="store_true", default=False,
 
909
    parser.add_option("--check", action="store_true",
661
910
                      help="Run self-test")
662
911
    parser.add_option("--debug", action="store_true",
663
912
                      help="Debug mode; run in foreground and log to"
670
919
                      default="/etc/mandos", metavar="DIR",
671
920
                      help="Directory to search for configuration"
672
921
                      " files")
673
 
    (options, args) = parser.parse_args()
 
922
    parser.add_option("--no-dbus", action="store_false",
 
923
                      dest="use_dbus",
 
924
                      help="Do not provide D-Bus system bus"
 
925
                      " interface")
 
926
    options = parser.parse_args()[0]
674
927
    
675
928
    if options.check:
676
929
        import doctest
685
938
                        "priority":
686
939
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
687
940
                        "servicename": "Mandos",
 
941
                        "use_dbus": "True",
688
942
                        }
689
943
    
690
944
    # Parse config file for server-global settings
691
945
    server_config = ConfigParser.SafeConfigParser(server_defaults)
692
946
    del server_defaults
693
947
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
694
 
    server_section = "server"
695
948
    # Convert the SafeConfigParser object to a dict
696
 
    server_settings = dict(server_config.items(server_section))
697
 
    # Use getboolean on the boolean config option
698
 
    server_settings["debug"] = server_config.getboolean\
699
 
                               (server_section, "debug")
 
949
    server_settings = server_config.defaults()
 
950
    # Use the appropriate methods on the non-string config options
 
951
    server_settings["debug"] = server_config.getboolean("DEFAULT",
 
952
                                                        "debug")
 
953
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
 
954
                                                           "use_dbus")
 
955
    if server_settings["port"]:
 
956
        server_settings["port"] = server_config.getint("DEFAULT",
 
957
                                                       "port")
700
958
    del server_config
701
959
    
702
960
    # Override the settings from the config file with command line
703
961
    # options, if set.
704
962
    for option in ("interface", "address", "port", "debug",
705
 
                   "priority", "servicename", "configdir"):
 
963
                   "priority", "servicename", "configdir",
 
964
                   "use_dbus"):
706
965
        value = getattr(options, option)
707
966
        if value is not None:
708
967
            server_settings[option] = value
709
968
    del options
710
969
    # Now we have our good server settings in "server_settings"
711
970
    
 
971
    # For convenience
 
972
    debug = server_settings["debug"]
 
973
    use_dbus = server_settings["use_dbus"]
 
974
    
 
975
    if not debug:
 
976
        syslogger.setLevel(logging.WARNING)
 
977
        console.setLevel(logging.WARNING)
 
978
    
 
979
    if server_settings["servicename"] != "Mandos":
 
980
        syslogger.setFormatter(logging.Formatter
 
981
                               ('Mandos (%s): %%(levelname)s:'
 
982
                                ' %%(message)s'
 
983
                                % server_settings["servicename"]))
 
984
    
712
985
    # Parse config file with clients
713
986
    client_defaults = { "timeout": "1h",
714
987
                        "interval": "5m",
715
 
                        "checker": "fping -q -- %%(fqdn)s",
 
988
                        "checker": "fping -q -- %%(host)s",
 
989
                        "host": "",
716
990
                        }
717
991
    client_config = ConfigParser.SafeConfigParser(client_defaults)
718
992
    client_config.read(os.path.join(server_settings["configdir"],
719
993
                                    "clients.conf"))
720
994
    
 
995
    clients = Set()
 
996
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
997
                                 server_settings["port"]),
 
998
                                TCP_handler,
 
999
                                settings=server_settings,
 
1000
                                clients=clients)
 
1001
    pidfilename = "/var/run/mandos.pid"
 
1002
    try:
 
1003
        pidfile = open(pidfilename, "w")
 
1004
    except IOError:
 
1005
        logger.error("Could not open file %r", pidfilename)
 
1006
    
 
1007
    try:
 
1008
        uid = pwd.getpwnam("_mandos").pw_uid
 
1009
        gid = pwd.getpwnam("_mandos").pw_gid
 
1010
    except KeyError:
 
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("nobody").pw_uid
 
1017
                gid = pwd.getpwnam("nogroup").pw_gid
 
1018
            except KeyError:
 
1019
                uid = 65534
 
1020
                gid = 65534
 
1021
    try:
 
1022
        os.setgid(gid)
 
1023
        os.setuid(uid)
 
1024
    except OSError, error:
 
1025
        if error[0] != errno.EPERM:
 
1026
            raise error
 
1027
    
 
1028
    # Enable all possible GnuTLS debugging
 
1029
    if debug:
 
1030
        # "Use a log level over 10 to enable all debugging options."
 
1031
        # - GnuTLS manual
 
1032
        gnutls.library.functions.gnutls_global_set_log_level(11)
 
1033
        
 
1034
        @gnutls.library.types.gnutls_log_func
 
1035
        def debug_gnutls(level, string):
 
1036
            logger.debug("GnuTLS: %s", string[:-1])
 
1037
        
 
1038
        (gnutls.library.functions
 
1039
         .gnutls_global_set_log_function(debug_gnutls))
 
1040
    
721
1041
    global service
722
1042
    service = AvahiService(name = server_settings["servicename"],
723
 
                           type = "_mandos._tcp", );
 
1043
                           servicetype = "_mandos._tcp", )
724
1044
    if server_settings["interface"]:
725
 
        service.interface = if_nametoindex(server_settings["interface"])
 
1045
        service.interface = (if_nametoindex
 
1046
                             (server_settings["interface"]))
726
1047
    
727
1048
    global main_loop
728
1049
    global bus
731
1052
    DBusGMainLoop(set_as_default=True )
732
1053
    main_loop = gobject.MainLoop()
733
1054
    bus = dbus.SystemBus()
734
 
    server = dbus.Interface(
735
 
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
736
 
            avahi.DBUS_INTERFACE_SERVER )
 
1055
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
1056
                                           avahi.DBUS_PATH_SERVER),
 
1057
                            avahi.DBUS_INTERFACE_SERVER)
737
1058
    # End of Avahi example code
738
 
    
739
 
    debug = server_settings["debug"]
740
 
    
741
 
    if debug:
742
 
        console = logging.StreamHandler()
743
 
        # console.setLevel(logging.DEBUG)
744
 
        console.setFormatter(logging.Formatter\
745
 
                             ('%(levelname)s: %(message)s'))
746
 
        logger.addHandler(console)
747
 
        del console
748
 
    
749
 
    clients = Set()
750
 
    def remove_from_clients(client):
751
 
        clients.remove(client)
752
 
        if not clients:
753
 
            logger.critical(u"No clients left, exiting")
754
 
            sys.exit()
 
1059
    if use_dbus:
 
1060
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
755
1061
    
756
1062
    clients.update(Set(Client(name = section,
757
 
                              stop_hook = remove_from_clients,
758
1063
                              config
759
 
                              = dict(client_config.items(section)))
 
1064
                              = dict(client_config.items(section)),
 
1065
                              use_dbus = use_dbus)
760
1066
                       for section in client_config.sections()))
 
1067
    if not clients:
 
1068
        logger.warning(u"No clients defined")
761
1069
    
762
 
    if not debug:
 
1070
    if debug:
 
1071
        # Redirect stdin so all checkers get /dev/null
 
1072
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
1073
        os.dup2(null, sys.stdin.fileno())
 
1074
        if null > 2:
 
1075
            os.close(null)
 
1076
    else:
 
1077
        # No console logging
 
1078
        logger.removeHandler(console)
 
1079
        # Close all input and output, do double fork, etc.
763
1080
        daemon()
764
1081
    
 
1082
    try:
 
1083
        pid = os.getpid()
 
1084
        pidfile.write(str(pid) + "\n")
 
1085
        pidfile.close()
 
1086
        del pidfile
 
1087
    except IOError:
 
1088
        logger.error(u"Could not write to file %r with PID %d",
 
1089
                     pidfilename, pid)
 
1090
    except NameError:
 
1091
        # "pidfile" was never created
 
1092
        pass
 
1093
    del pidfilename
 
1094
    
765
1095
    def cleanup():
766
1096
        "Cleanup function; run on exit"
767
1097
        global group
773
1103
        
774
1104
        while clients:
775
1105
            client = clients.pop()
776
 
            client.stop_hook = None
777
 
            client.stop()
 
1106
            client.disable_hook = None
 
1107
            client.disable()
778
1108
    
779
1109
    atexit.register(cleanup)
780
1110
    
783
1113
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
784
1114
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
785
1115
    
 
1116
    if use_dbus:
 
1117
        class MandosServer(dbus.service.Object):
 
1118
            """A D-Bus proxy object"""
 
1119
            def __init__(self):
 
1120
                dbus.service.Object.__init__(self, bus, "/")
 
1121
            _interface = u"se.bsnet.fukt.Mandos"
 
1122
            
 
1123
            @dbus.service.signal(_interface, signature="oa{sv}")
 
1124
            def ClientAdded(self, objpath, properties):
 
1125
                "D-Bus signal"
 
1126
                pass
 
1127
            
 
1128
            @dbus.service.signal(_interface, signature="os")
 
1129
            def ClientRemoved(self, objpath, name):
 
1130
                "D-Bus signal"
 
1131
                pass
 
1132
            
 
1133
            @dbus.service.method(_interface, out_signature="ao")
 
1134
            def GetAllClients(self):
 
1135
                "D-Bus method"
 
1136
                return dbus.Array(c.dbus_object_path for c in clients)
 
1137
            
 
1138
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
 
1139
            def GetAllClientsWithProperties(self):
 
1140
                "D-Bus method"
 
1141
                return dbus.Dictionary(
 
1142
                    ((c.dbus_object_path, c.GetAllProperties())
 
1143
                     for c in clients),
 
1144
                    signature="oa{sv}")
 
1145
            
 
1146
            @dbus.service.method(_interface, in_signature="o")
 
1147
            def RemoveClient(self, object_path):
 
1148
                "D-Bus method"
 
1149
                for c in clients:
 
1150
                    if c.dbus_object_path == object_path:
 
1151
                        clients.remove(c)
 
1152
                        # Don't signal anything except ClientRemoved
 
1153
                        c.use_dbus = False
 
1154
                        c.disable()
 
1155
                        # Emit D-Bus signal
 
1156
                        self.ClientRemoved(object_path, c.name)
 
1157
                        return
 
1158
                raise KeyError
 
1159
            
 
1160
            del _interface
 
1161
        
 
1162
        mandos_server = MandosServer()
 
1163
    
786
1164
    for client in clients:
787
 
        client.start()
788
 
    
789
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
790
 
                                 server_settings["port"]),
791
 
                                tcp_handler,
792
 
                                settings=server_settings,
793
 
                                clients=clients)
 
1165
        if use_dbus:
 
1166
            # Emit D-Bus signal
 
1167
            mandos_server.ClientAdded(client.dbus_object_path,
 
1168
                                      client.GetAllProperties())
 
1169
        client.enable()
 
1170
    
 
1171
    tcp_server.enable()
 
1172
    tcp_server.server_activate()
 
1173
    
794
1174
    # Find out what port we got
795
1175
    service.port = tcp_server.socket.getsockname()[1]
796
1176
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
810
1190
        
811
1191
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
812
1192
                             lambda *args, **kwargs:
813
 
                             tcp_server.handle_request\
814
 
                             (*args[2:], **kwargs) or True)
 
1193
                             (tcp_server.handle_request
 
1194
                              (*args[2:], **kwargs) or True))
815
1195
        
816
 
        logger.debug("Starting main loop")
817
 
        main_loop_started = True
 
1196
        logger.debug(u"Starting main loop")
818
1197
        main_loop.run()
819
1198
    except AvahiError, error:
820
 
        logger.critical(u"AvahiError: %s" + unicode(error))
 
1199
        logger.critical(u"AvahiError: %s", error)
821
1200
        sys.exit(1)
822
1201
    except KeyboardInterrupt:
823
1202
        if debug:
824
 
            print
 
1203
            print >> sys.stderr
 
1204
        logger.debug("Server received KeyboardInterrupt")
 
1205
    logger.debug("Server exiting")
825
1206
 
826
1207
if __name__ == '__main__':
827
1208
    main()