/mandos/trunk

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/trunk

« back to all changes in this revision

Viewing changes to mandos

  • 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".

Show diffs side-by-side

added added

removed removed

Lines of Context:
mandos
11
11
# and some lines in "main".
12
12
# 
13
13
# 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
 
64
 
version = "1.0"
 
69
version = "1.0.5"
65
70
 
66
71
logger = logging.Logger('mandos')
67
 
syslogger = logging.handlers.SysLogHandler\
68
 
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
69
 
             address = "/dev/log")
70
 
syslogger.setFormatter(logging.Formatter\
71
 
                        ('Mandos: %(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'))
72
78
logger.addHandler(syslogger)
73
79
 
 
80
console = logging.StreamHandler()
 
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
 
82
                                       ' %(levelname)s: %(message)s'))
 
83
logger.addHandler(console)
74
84
 
75
85
class AvahiError(Exception):
76
 
    def __init__(self, value):
 
86
    def __init__(self, value, *args, **kwargs):
77
87
        self.value = value
78
 
    def __str__(self):
79
 
        return repr(self.value)
 
88
        super(AvahiError, self).__init__(value, *args, **kwargs)
 
89
    def __unicode__(self):
 
90
        return unicode(repr(self.value))
80
91
 
81
92
class AvahiServiceError(AvahiError):
82
93
    pass
102
113
                  a sensible number of times
103
114
    """
104
115
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
105
 
                 type = None, port = None, TXT = None, domain = "",
106
 
                 host = "", max_renames = 32768):
 
116
                 servicetype = None, port = None, TXT = None,
 
117
                 domain = "", host = "", max_renames = 32768):
107
118
        self.interface = interface
108
119
        self.name = name
109
 
        self.type = type
 
120
        self.type = servicetype
110
121
        self.port = port
111
 
        if TXT is None:
112
 
            self.TXT = []
113
 
        else:
114
 
            self.TXT = TXT
 
122
        self.TXT = TXT if TXT is not None else []
115
123
        self.domain = domain
116
124
        self.host = host
117
125
        self.rename_count = 0
 
126
        self.max_renames = max_renames
118
127
    def rename(self):
119
128
        """Derived from the Avahi example code"""
120
129
        if self.rename_count >= self.max_renames:
121
 
            logger.critical(u"No suitable service name found after %i"
122
 
                            u" retries, exiting.", rename_count)
123
 
            raise AvahiServiceError("Too many renames")
124
 
        name = server.GetAlternativeServiceName(name)
125
 
        logger.error(u"Changing name to %r ...", name)
126
 
        syslogger.setFormatter(logging.Formatter\
 
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
127
138
                               ('Mandos (%s): %%(levelname)s:'
128
 
                               ' %%(message)s' % name))
 
139
                                ' %%(message)s' % self.name))
129
140
        self.remove()
130
141
        self.add()
131
142
        self.rename_count += 1
137
148
        """Derived from the Avahi example code"""
138
149
        global group
139
150
        if group is None:
140
 
            group = dbus.Interface\
141
 
                    (bus.get_object(avahi.DBUS_NAME,
 
151
            group = dbus.Interface(bus.get_object
 
152
                                   (avahi.DBUS_NAME,
142
153
                                    server.EntryGroupNew()),
143
 
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
154
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
144
155
            group.connect_to_signal('StateChanged',
145
156
                                    entry_group_state_changed)
146
 
        logger.debug(u"Adding service '%s' of type '%s' ...",
 
157
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
147
158
                     service.name, service.type)
148
159
        group.AddService(
149
160
                self.interface,         # interface
160
171
# End of Avahi example code
161
172
 
162
173
 
163
 
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):
164
180
    """A representation of a client host served by this server.
165
181
    Attributes:
166
 
    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
167
184
    fingerprint: string (40 or 32 hexadecimal digits); used to
168
185
                 uniquely identify the client
169
 
    secret:    bytestring; sent verbatim (over TLS) to client
170
 
    host:      string; available for use by the checker command
171
 
    created:   datetime.datetime(); object creation, not client host
172
 
    last_checked_ok: datetime.datetime() or None if not yet checked OK
173
 
    timeout:   datetime.timedelta(); How long from last_checked_ok
174
 
                                     until this client is invalid
175
 
    interval:  datetime.timedelta(); How often to start a new checker
176
 
    stop_hook: If set, called by stop() as stop_hook(self)
177
 
    checker:   subprocess.Popen(); a running checker process used
178
 
                                   to see if the client lives.
179
 
                                   '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.
180
199
    checker_initiator_tag: a gobject event source tag, or None
181
 
    stop_initiator_tag:    - '' -
 
200
    disable_initiator_tag:    - '' -
182
201
    checker_callback_tag:  - '' -
183
202
    checker_command: string; External command which is run to check if
184
203
                     client lives.  %() expansions are done at
185
204
                     runtime with vars(self) as dict, so that for
186
205
                     instance %(name)s can be used in the command.
187
 
    Private attibutes:
188
 
    _timeout: Real variable for 'timeout'
189
 
    _interval: Real variable for 'interval'
190
 
    _timeout_milliseconds: Used when calling gobject.timeout_add()
191
 
    _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
192
208
    """
193
 
    def _set_timeout(self, timeout):
194
 
        "Setter function for 'timeout' attribute"
195
 
        self._timeout = timeout
196
 
        self._timeout_milliseconds = ((self.timeout.days
197
 
                                       * 24 * 60 * 60 * 1000)
198
 
                                      + (self.timeout.seconds * 1000)
199
 
                                      + (self.timeout.microseconds
200
 
                                         // 1000))
201
 
    timeout = property(lambda self: self._timeout,
202
 
                       _set_timeout)
203
 
    del _set_timeout
204
 
    def _set_interval(self, interval):
205
 
        "Setter function for 'interval' attribute"
206
 
        self._interval = interval
207
 
        self._interval_milliseconds = ((self.interval.days
208
 
                                        * 24 * 60 * 60 * 1000)
209
 
                                       + (self.interval.seconds
210
 
                                          * 1000)
211
 
                                       + (self.interval.microseconds
212
 
                                          // 1000))
213
 
    interval = property(lambda self: self._interval,
214
 
                        _set_interval)
215
 
    del _set_interval
216
 
    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):
217
223
        """Note: the 'checker' key in 'config' sets the
218
224
        'checker_command' attribute and *not* the 'checker'
219
225
        attribute."""
220
226
        self.name = name
 
227
        if config is None:
 
228
            config = {}
221
229
        logger.debug(u"Creating client %r", self.name)
 
230
        self.use_dbus = False   # During __init__
222
231
        # Uppercase and remove spaces from fingerprint for later
223
232
        # comparison purposes with return value from the fingerprint()
224
233
        # function
225
 
        self.fingerprint = config["fingerprint"].upper()\
226
 
                           .replace(u" ", u"")
 
234
        self.fingerprint = (config["fingerprint"].upper()
 
235
                            .replace(u" ", u""))
227
236
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
228
237
        if "secret" in config:
229
238
            self.secret = config["secret"].decode(u"base64")
230
239
        elif "secfile" in config:
231
 
            sf = open(config["secfile"])
232
 
            self.secret = sf.read()
233
 
            sf.close()
 
240
            with closing(open(os.path.expanduser
 
241
                              (os.path.expandvars
 
242
                               (config["secfile"])))) as secfile:
 
243
                self.secret = secfile.read()
234
244
        else:
235
245
            raise TypeError(u"No secret or secfile for client %s"
236
246
                            % self.name)
237
247
        self.host = config.get("host", "")
238
 
        self.created = datetime.datetime.now()
 
248
        self.created = datetime.datetime.utcnow()
 
249
        self.enabled = False
 
250
        self.last_enabled = None
239
251
        self.last_checked_ok = None
240
252
        self.timeout = string_to_delta(config["timeout"])
241
253
        self.interval = string_to_delta(config["interval"])
242
 
        self.stop_hook = stop_hook
 
254
        self.disable_hook = disable_hook
243
255
        self.checker = None
244
256
        self.checker_initiator_tag = None
245
 
        self.stop_initiator_tag = None
 
257
        self.disable_initiator_tag = None
246
258
        self.checker_callback_tag = None
247
 
        self.check_command = config["checker"]
248
 
    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):
249
272
        """Start this client's checker and timeout hooks"""
 
273
        self.last_enabled = datetime.datetime.utcnow()
250
274
        # Schedule a new checker to be started an 'interval' from now,
251
275
        # and every interval from then on.
252
 
        self.checker_initiator_tag = gobject.timeout_add\
253
 
                                     (self._interval_milliseconds,
254
 
                                      self.start_checker)
 
276
        self.checker_initiator_tag = (gobject.timeout_add
 
277
                                      (self.interval_milliseconds(),
 
278
                                       self.start_checker))
255
279
        # Also start a new checker *right now*.
256
280
        self.start_checker()
257
 
        # Schedule a stop() when 'timeout' has passed
258
 
        self.stop_initiator_tag = gobject.timeout_add\
259
 
                                  (self._timeout_milliseconds,
260
 
                                   self.stop)
261
 
    def stop(self):
262
 
        """Stop this client.
263
 
        The possibility that a client might be restarted is left open,
264
 
        but not currently used."""
265
 
        # If this client doesn't have a secret, it is already stopped.
266
 
        if hasattr(self, "secret") and self.secret:
267
 
            logger.info(u"Stopping client %s", self.name)
268
 
            self.secret = None
269
 
        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):
270
297
            return False
271
 
        if getattr(self, "stop_initiator_tag", False):
272
 
            gobject.source_remove(self.stop_initiator_tag)
273
 
            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
274
302
        if getattr(self, "checker_initiator_tag", False):
275
303
            gobject.source_remove(self.checker_initiator_tag)
276
304
            self.checker_initiator_tag = None
277
305
        self.stop_checker()
278
 
        if self.stop_hook:
279
 
            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))
280
313
        # Do not run this again if called by a gobject.timeout_add
281
314
        return False
 
315
    
282
316
    def __del__(self):
283
 
        self.stop_hook = None
284
 
        self.stop()
285
 
    def checker_callback(self, pid, condition):
 
317
        self.disable_hook = None
 
318
        self.disable()
 
319
    
 
320
    def checker_callback(self, pid, condition, command):
286
321
        """The checker has completed, so take appropriate actions."""
287
 
        now = datetime.datetime.now()
288
322
        self.checker_callback_tag = None
289
323
        self.checker = None
290
 
        if os.WIFEXITED(condition) \
291
 
               and (os.WEXITSTATUS(condition) == 0):
292
 
            logger.info(u"Checker for %(name)s succeeded",
293
 
                        vars(self))
294
 
            self.last_checked_ok = now
295
 
            gobject.source_remove(self.stop_initiator_tag)
296
 
            self.stop_initiator_tag = gobject.timeout_add\
297
 
                                      (self._timeout_milliseconds,
298
 
                                       self.stop)
299
 
        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:
300
343
            logger.warning(u"Checker for %(name)s crashed?",
301
344
                           vars(self))
302
 
        else:
303
 
            logger.info(u"Checker for %(name)s failed",
304
 
                        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
    
305
368
    def start_checker(self):
306
369
        """Start a new checker subprocess if one is not running.
307
370
        If a checker already exists, leave it running and do
316
379
        # is as it should be.
317
380
        if self.checker is None:
318
381
            try:
319
 
                # In case check_command has exactly one % operator
320
 
                command = self.check_command % self.host
 
382
                # In case checker_command has exactly one % operator
 
383
                command = self.checker_command % self.host
321
384
            except TypeError:
322
385
                # Escape attributes for the shell
323
386
                escaped_attrs = dict((key, re.escape(str(val)))
324
387
                                     for key, val in
325
388
                                     vars(self).iteritems())
326
389
                try:
327
 
                    command = self.check_command % escaped_attrs
 
390
                    command = self.checker_command % escaped_attrs
328
391
                except TypeError, error:
329
392
                    logger.error(u'Could not format string "%s":'
330
 
                                 u' %s', self.check_command, error)
 
393
                                 u' %s', self.checker_command, error)
331
394
                    return True # Try again later
332
395
            try:
333
396
                logger.info(u"Starting checker %r for %s",
334
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.)
335
402
                self.checker = subprocess.Popen(command,
336
403
                                                close_fds=True,
337
404
                                                shell=True, cwd="/")
338
 
                self.checker_callback_tag = gobject.child_watch_add\
339
 
                                            (self.checker.pid,
340
 
                                             self.checker_callback)
341
 
            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:
342
416
                logger.error(u"Failed to start subprocess: %s",
343
417
                             error)
344
418
        # Re-run this periodically if run by gobject.timeout_add
345
419
        return True
 
420
    
346
421
    def stop_checker(self):
347
422
        """Force the checker process, if any, to stop."""
348
423
        if self.checker_callback_tag:
360
435
            if error.errno != errno.ESRCH: # No such process
361
436
                raise
362
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
    
363
442
    def still_valid(self):
364
443
        """Has the timeout not yet passed for this client?"""
365
 
        now = datetime.datetime.now()
 
444
        if not getattr(self, "enabled", False):
 
445
            return False
 
446
        now = datetime.datetime.utcnow()
366
447
        if self.last_checked_ok is None:
367
448
            return now < (self.created + self.timeout)
368
449
        else:
369
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
370
589
 
371
590
 
372
591
def peer_certificate(session):
373
592
    "Return the peer's OpenPGP certificate as a bytestring"
374
593
    # If not an OpenPGP certificate...
375
 
    if gnutls.library.functions.gnutls_certificate_type_get\
376
 
            (session._c_object) \
377
 
           != 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):
378
597
        # ...do the normal thing
379
598
        return session.peer_certificate
380
 
    list_size = ctypes.c_uint()
381
 
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
382
 
        (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")
383
606
    if list_size.value == 0:
384
607
        return None
385
608
    cert = cert_list[0]
389
612
def fingerprint(openpgp):
390
613
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
391
614
    # New GnuTLS "datum" with the OpenPGP public key
392
 
    datum = gnutls.library.types.gnutls_datum_t\
393
 
        (ctypes.cast(ctypes.c_char_p(openpgp),
394
 
                     ctypes.POINTER(ctypes.c_ubyte)),
395
 
         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))))
396
620
    # New empty GnuTLS certificate
397
621
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
398
 
    gnutls.library.functions.gnutls_openpgp_crt_init\
399
 
        (ctypes.byref(crt))
 
622
    (gnutls.library.functions
 
623
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
400
624
    # Import the OpenPGP public key into the certificate
401
 
    gnutls.library.functions.gnutls_openpgp_crt_import\
402
 
                    (crt, ctypes.byref(datum),
403
 
                     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")
404
636
    # New buffer for the fingerprint
405
 
    buffer = ctypes.create_string_buffer(20)
406
 
    buffer_length = ctypes.c_size_t()
 
637
    buf = ctypes.create_string_buffer(20)
 
638
    buf_len = ctypes.c_size_t()
407
639
    # Get the fingerprint from the certificate into the buffer
408
 
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
409
 
        (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)))
410
643
    # Deinit the certificate
411
644
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
412
645
    # Convert the buffer to a Python bytestring
413
 
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
646
    fpr = ctypes.string_at(buf, buf_len.value)
414
647
    # Convert the bytestring to hexadecimal notation
415
648
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
416
649
    return hex_fpr
417
650
 
418
651
 
419
 
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
652
class TCP_handler(SocketServer.BaseRequestHandler, object):
420
653
    """A TCP request handler class.
421
654
    Instantiated by IPv6_TCPServer for each request to handle it.
422
655
    Note: This will run in its own forked process."""
423
656
    
424
657
    def handle(self):
425
658
        logger.info(u"TCP connection from: %s",
426
 
                     unicode(self.client_address))
427
 
        session = gnutls.connection.ClientSession\
428
 
                  (self.request, gnutls.connection.X509Credentials())
 
659
                    unicode(self.client_address))
 
660
        session = (gnutls.connection
 
661
                   .ClientSession(self.request,
 
662
                                  gnutls.connection
 
663
                                  .X509Credentials()))
429
664
        
430
665
        line = self.request.makefile().readline()
431
666
        logger.debug(u"Protocol version: %r", line)
442
677
        # using OpenPGP certificates.
443
678
        
444
679
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
445
 
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
446
 
        #                "+DHE-DSS"))
447
 
        priority = "NORMAL"             # Fallback default, since this
448
 
                                        # MUST be set.
449
 
        if self.server.settings["priority"]:
450
 
            priority = self.server.settings["priority"]
451
 
        gnutls.library.functions.gnutls_priority_set_direct\
452
 
            (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))
453
687
        
454
688
        try:
455
689
            session.handshake()
458
692
            # Do not run session.bye() here: the session is not
459
693
            # established.  Just abandon the request.
460
694
            return
 
695
        logger.debug(u"Handshake succeeded")
461
696
        try:
462
697
            fpr = fingerprint(peer_certificate(session))
463
698
        except (TypeError, gnutls.errors.GNUTLSError), error:
465
700
            session.bye()
466
701
            return
467
702
        logger.debug(u"Fingerprint: %s", fpr)
468
 
        client = None
 
703
        
469
704
        for c in self.server.clients:
470
705
            if c.fingerprint == fpr:
471
706
                client = c
472
707
                break
473
 
        if not client:
 
708
        else:
474
709
            logger.warning(u"Client not found for fingerprint: %s",
475
710
                           fpr)
476
711
            session.bye()
483
718
                           vars(client))
484
719
            session.bye()
485
720
            return
 
721
        ## This won't work here, since we're in a fork.
 
722
        # client.checked_ok()
486
723
        sent_size = 0
487
724
        while sent_size < len(client.secret):
488
725
            sent = session.send(client.secret[sent_size:])
493
730
        session.bye()
494
731
 
495
732
 
496
 
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
733
class IPv6_TCPServer(SocketServer.ForkingMixIn,
 
734
                     SocketServer.TCPServer, object):
497
735
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
498
736
    Attributes:
499
737
        settings:       Server settings
500
738
        clients:        Set() of Client objects
 
739
        enabled:        Boolean; whether this server is activated yet
501
740
    """
502
741
    address_family = socket.AF_INET6
503
742
    def __init__(self, *args, **kwargs):
507
746
        if "clients" in kwargs:
508
747
            self.clients = kwargs["clients"]
509
748
            del kwargs["clients"]
510
 
        return super(type(self), self).__init__(*args, **kwargs)
 
749
        self.enabled = False
 
750
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
511
751
    def server_bind(self):
512
752
        """This overrides the normal server_bind() function
513
753
        to bind to an interface if one was specified, and also NOT to
525
765
                                 u" bind to interface %s",
526
766
                                 self.settings["interface"])
527
767
                else:
528
 
                    raise error
 
768
                    raise
529
769
        # Only bind(2) the socket if we really need to.
530
770
        if self.server_address[0] or self.server_address[1]:
531
771
            if not self.server_address[0]:
542
782
#                                            if_nametoindex
543
783
#                                            (self.settings
544
784
#                                             ["interface"]))
545
 
            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
546
791
 
547
792
 
548
793
def string_to_delta(interval):
549
794
    """Parse a string and return a datetime.timedelta
550
 
 
 
795
    
551
796
    >>> string_to_delta('7d')
552
797
    datetime.timedelta(7)
553
798
    >>> string_to_delta('60s')
558
803
    datetime.timedelta(1)
559
804
    >>> string_to_delta(u'1w')
560
805
    datetime.timedelta(7)
 
806
    >>> string_to_delta('5m 30s')
 
807
    datetime.timedelta(0, 330)
561
808
    """
562
 
    try:
563
 
        suffix=unicode(interval[-1])
564
 
        value=int(interval[:-1])
565
 
        if suffix == u"d":
566
 
            delta = datetime.timedelta(value)
567
 
        elif suffix == u"s":
568
 
            delta = datetime.timedelta(0, value)
569
 
        elif suffix == u"m":
570
 
            delta = datetime.timedelta(0, 0, 0, 0, value)
571
 
        elif suffix == u"h":
572
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
573
 
        elif suffix == u"w":
574
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
575
 
        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):
576
827
            raise ValueError
577
 
    except (ValueError, IndexError):
578
 
        raise ValueError
579
 
    return delta
 
828
        timevalue += delta
 
829
    return timevalue
580
830
 
581
831
 
582
832
def server_state_changed(state):
583
833
    """Derived from the Avahi example code"""
584
834
    if state == avahi.SERVER_COLLISION:
585
 
        logger.error(u"Server name collision")
 
835
        logger.error(u"Zeroconf server name collision")
586
836
        service.remove()
587
837
    elif state == avahi.SERVER_RUNNING:
588
838
        service.add()
590
840
 
591
841
def entry_group_state_changed(state, error):
592
842
    """Derived from the Avahi example code"""
593
 
    logger.debug(u"state change: %i", state)
 
843
    logger.debug(u"Avahi state change: %i", state)
594
844
    
595
845
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
596
 
        logger.debug(u"Service established.")
 
846
        logger.debug(u"Zeroconf service established.")
597
847
    elif state == avahi.ENTRY_GROUP_COLLISION:
598
 
        logger.warning(u"Service name collision.")
 
848
        logger.warning(u"Zeroconf service name collision.")
599
849
        service.rename()
600
850
    elif state == avahi.ENTRY_GROUP_FAILURE:
601
 
        logger.critical(u"Error in group state changed %s",
 
851
        logger.critical(u"Avahi: Error in group state changed %s",
602
852
                        unicode(error))
603
 
        raise AvahiGroupError("State changed: %s", str(error))
 
853
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
604
854
 
605
855
def if_nametoindex(interface):
606
856
    """Call the C function if_nametoindex(), or equivalent"""
607
857
    global if_nametoindex
608
858
    try:
609
 
        if "ctypes.util" not in sys.modules:
610
 
            import ctypes.util
611
 
        if_nametoindex = ctypes.cdll.LoadLibrary\
612
 
            (ctypes.util.find_library("c")).if_nametoindex
 
859
        if_nametoindex = (ctypes.cdll.LoadLibrary
 
860
                          (ctypes.util.find_library("c"))
 
861
                          .if_nametoindex)
613
862
    except (OSError, AttributeError):
614
863
        if "struct" not in sys.modules:
615
864
            import struct
618
867
        def if_nametoindex(interface):
619
868
            "Get an interface index the hard way, i.e. using fcntl()"
620
869
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
621
 
            s = socket.socket()
622
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
623
 
                                struct.pack("16s16x", interface))
624
 
            s.close()
 
870
            with closing(socket.socket()) as s:
 
871
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
872
                                    struct.pack("16s16x", interface))
625
873
            interface_index = struct.unpack("I", ifreq[16:20])[0]
626
874
            return interface_index
627
875
    return if_nametoindex(interface)
651
899
 
652
900
 
653
901
def main():
654
 
    global main_loop_started
655
 
    main_loop_started = False
656
 
    
657
 
    parser = OptionParser(version = "Mandos server %s" % version)
 
902
    parser = optparse.OptionParser(version = "%%prog %s" % version)
658
903
    parser.add_option("-i", "--interface", type="string",
659
904
                      metavar="IF", help="Bind to interface IF")
660
905
    parser.add_option("-a", "--address", type="string",
661
906
                      help="Address to listen for requests on")
662
907
    parser.add_option("-p", "--port", type="int",
663
908
                      help="Port number to receive requests on")
664
 
    parser.add_option("--check", action="store_true", default=False,
 
909
    parser.add_option("--check", action="store_true",
665
910
                      help="Run self-test")
666
911
    parser.add_option("--debug", action="store_true",
667
912
                      help="Debug mode; run in foreground and log to"
674
919
                      default="/etc/mandos", metavar="DIR",
675
920
                      help="Directory to search for configuration"
676
921
                      " files")
677
 
    (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]
678
927
    
679
928
    if options.check:
680
929
        import doctest
689
938
                        "priority":
690
939
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
691
940
                        "servicename": "Mandos",
 
941
                        "use_dbus": "True",
692
942
                        }
693
943
    
694
944
    # Parse config file for server-global settings
695
945
    server_config = ConfigParser.SafeConfigParser(server_defaults)
696
946
    del server_defaults
697
947
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
698
 
    server_section = "server"
699
948
    # Convert the SafeConfigParser object to a dict
700
 
    server_settings = dict(server_config.items(server_section))
701
 
    # Use getboolean on the boolean config option
702
 
    server_settings["debug"] = server_config.getboolean\
703
 
                               (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")
704
958
    del server_config
705
959
    
706
960
    # Override the settings from the config file with command line
707
961
    # options, if set.
708
962
    for option in ("interface", "address", "port", "debug",
709
 
                   "priority", "servicename", "configdir"):
 
963
                   "priority", "servicename", "configdir",
 
964
                   "use_dbus"):
710
965
        value = getattr(options, option)
711
966
        if value is not None:
712
967
            server_settings[option] = value
713
968
    del options
714
969
    # Now we have our good server settings in "server_settings"
715
970
    
 
971
    # For convenience
716
972
    debug = server_settings["debug"]
 
973
    use_dbus = server_settings["use_dbus"]
717
974
    
718
975
    if not debug:
719
976
        syslogger.setLevel(logging.WARNING)
 
977
        console.setLevel(logging.WARNING)
720
978
    
721
979
    if server_settings["servicename"] != "Mandos":
722
 
        syslogger.setFormatter(logging.Formatter\
 
980
        syslogger.setFormatter(logging.Formatter
723
981
                               ('Mandos (%s): %%(levelname)s:'
724
982
                                ' %%(message)s'
725
983
                                % server_settings["servicename"]))
728
986
    client_defaults = { "timeout": "1h",
729
987
                        "interval": "5m",
730
988
                        "checker": "fping -q -- %%(host)s",
 
989
                        "host": "",
731
990
                        }
732
991
    client_config = ConfigParser.SafeConfigParser(client_defaults)
733
992
    client_config.read(os.path.join(server_settings["configdir"],
734
993
                                    "clients.conf"))
735
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
    
736
1041
    global service
737
1042
    service = AvahiService(name = server_settings["servicename"],
738
 
                           type = "_mandos._tcp", );
 
1043
                           servicetype = "_mandos._tcp", )
739
1044
    if server_settings["interface"]:
740
 
        service.interface = if_nametoindex(server_settings["interface"])
 
1045
        service.interface = (if_nametoindex
 
1046
                             (server_settings["interface"]))
741
1047
    
742
1048
    global main_loop
743
1049
    global bus
746
1052
    DBusGMainLoop(set_as_default=True )
747
1053
    main_loop = gobject.MainLoop()
748
1054
    bus = dbus.SystemBus()
749
 
    server = dbus.Interface(
750
 
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
751
 
            avahi.DBUS_INTERFACE_SERVER )
 
1055
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
1056
                                           avahi.DBUS_PATH_SERVER),
 
1057
                            avahi.DBUS_INTERFACE_SERVER)
752
1058
    # End of Avahi example code
753
 
    
754
 
    if debug:
755
 
        console = logging.StreamHandler()
756
 
        # console.setLevel(logging.DEBUG)
757
 
        console.setFormatter(logging.Formatter\
758
 
                             ('%(levelname)s: %(message)s'))
759
 
        logger.addHandler(console)
760
 
        del console
761
 
    
762
 
    clients = Set()
763
 
    def remove_from_clients(client):
764
 
        clients.remove(client)
765
 
        if not clients:
766
 
            logger.critical(u"No clients left, exiting")
767
 
            sys.exit()
 
1059
    if use_dbus:
 
1060
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
768
1061
    
769
1062
    clients.update(Set(Client(name = section,
770
 
                              stop_hook = remove_from_clients,
771
1063
                              config
772
 
                              = dict(client_config.items(section)))
 
1064
                              = dict(client_config.items(section)),
 
1065
                              use_dbus = use_dbus)
773
1066
                       for section in client_config.sections()))
774
1067
    if not clients:
775
 
        logger.critical(u"No clients defined")
776
 
        sys.exit(1)
 
1068
        logger.warning(u"No clients defined")
777
1069
    
778
 
    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.
779
1080
        daemon()
780
1081
    
781
 
    pidfilename = "/var/run/mandos/mandos.pid"
782
 
    pid = os.getpid()
783
1082
    try:
784
 
        pidfile = open(pidfilename, "w")
 
1083
        pid = os.getpid()
785
1084
        pidfile.write(str(pid) + "\n")
786
1085
        pidfile.close()
787
1086
        del pidfile
788
 
    except IOError, err:
789
 
        logger.error(u"Could not write %s file with PID %d",
790
 
                     pidfilename, os.getpid())
 
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
791
1094
    
792
1095
    def cleanup():
793
1096
        "Cleanup function; run on exit"
800
1103
        
801
1104
        while clients:
802
1105
            client = clients.pop()
803
 
            client.stop_hook = None
804
 
            client.stop()
 
1106
            client.disable_hook = None
 
1107
            client.disable()
805
1108
    
806
1109
    atexit.register(cleanup)
807
1110
    
810
1113
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
811
1114
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
812
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
    
813
1164
    for client in clients:
814
 
        client.start()
815
 
    
816
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
817
 
                                 server_settings["port"]),
818
 
                                tcp_handler,
819
 
                                settings=server_settings,
820
 
                                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
    
821
1174
    # Find out what port we got
822
1175
    service.port = tcp_server.socket.getsockname()[1]
823
1176
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
837
1190
        
838
1191
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
839
1192
                             lambda *args, **kwargs:
840
 
                             tcp_server.handle_request\
841
 
                             (*args[2:], **kwargs) or True)
 
1193
                             (tcp_server.handle_request
 
1194
                              (*args[2:], **kwargs) or True))
842
1195
        
843
1196
        logger.debug(u"Starting main loop")
844
 
        main_loop_started = True
845
1197
        main_loop.run()
846
1198
    except AvahiError, error:
847
 
        logger.critical(u"AvahiError: %s" + unicode(error))
 
1199
        logger.critical(u"AvahiError: %s", error)
848
1200
        sys.exit(1)
849
1201
    except KeyboardInterrupt:
850
1202
        if debug:
851
 
            print
 
1203
            print >> sys.stderr
 
1204
        logger.debug("Server received KeyboardInterrupt")
 
1205
    logger.debug("Server exiting")
852
1206
 
853
1207
if __name__ == '__main__':
854
1208
    main()