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  • Committer: Teddy Hogeborn
  • Date: 2008-08-07 21:45:41 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080807214541-pyg8itw6kphz1dy5
* plugbasedclient.c: Renamed to "mandos-client.c".  All users changed.

* plugins.d/mandosclient.c: Renamed to "plugins.d/password-request.c".
                            All users changed.

* plugins.d/passprompt.c: Renamed to "plugins.d/password-prompt.c".
                          All users changed.

* server.conf: Renamed to "mandos.conf".  All users changed.

* server.py: Renamed to "mandos".
  (daemon): Have default values for arguments. Caller changed.

* Makefile (distclean, mostlyclean, maintainer-clean): New aliases for
                                                       "clean".
  (check, run-client, run-server): New.

* network-protocol.txt: New.

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Lines of Context:
mandos
11
11
# and some lines in "main".
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# 
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# Everything else is
14
 
# Copyright © 2008,2009 Teddy Hogeborn
15
 
# Copyright © 2008,2009 Björn Påhlsson
 
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
# 
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
#     GNU General Public License for more details.
26
25
# 
27
26
# You should have received a copy of the GNU General Public License
28
 
# along with this program.  If not, see
29
 
# <http://www.gnu.org/licenses/>.
 
27
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
30
28
# 
31
29
# Contact the authors at <mandos@fukt.bsnet.se>.
32
30
# 
33
31
 
34
 
from __future__ import division, with_statement, absolute_import
 
32
from __future__ import division
35
33
 
36
34
import SocketServer
37
35
import socket
38
 
import optparse
 
36
import select
 
37
from optparse import OptionParser
39
38
import datetime
40
39
import errno
41
40
import gnutls.crypto
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
 
import pwd
59
 
from contextlib import closing
60
57
 
61
58
import dbus
62
 
import dbus.service
63
59
import gobject
64
60
import avahi
65
61
from dbus.mainloop.glib import DBusGMainLoop
66
62
import ctypes
67
 
import ctypes.util
68
63
 
69
 
version = "1.0.5"
70
64
 
71
65
logger = logging.Logger('mandos')
72
 
syslogger = (logging.handlers.SysLogHandler
73
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
 
              address = "/dev/log"))
75
 
syslogger.setFormatter(logging.Formatter
76
 
                       ('Mandos [%(process)d]: %(levelname)s:'
77
 
                        ' %(message)s'))
 
66
syslogger = logging.handlers.SysLogHandler\
 
67
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON)
 
68
syslogger.setFormatter(logging.Formatter\
 
69
                        ('%(levelname)s: %(message)s'))
78
70
logger.addHandler(syslogger)
 
71
del syslogger
79
72
 
80
 
console = logging.StreamHandler()
81
 
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
 
                                       ' %(levelname)s: %(message)s'))
83
 
logger.addHandler(console)
84
73
 
85
74
class AvahiError(Exception):
86
 
    def __init__(self, value, *args, **kwargs):
 
75
    def __init__(self, value):
87
76
        self.value = value
88
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
89
 
    def __unicode__(self):
90
 
        return unicode(repr(self.value))
 
77
    def __str__(self):
 
78
        return repr(self.value)
91
79
 
92
80
class AvahiServiceError(AvahiError):
93
81
    pass
113
101
                  a sensible number of times
114
102
    """
115
103
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
 
                 servicetype = None, port = None, TXT = None,
117
 
                 domain = "", host = "", max_renames = 32768):
 
104
                 type = None, port = None, TXT = None, domain = "",
 
105
                 host = "", max_renames = 12):
118
106
        self.interface = interface
119
107
        self.name = name
120
 
        self.type = servicetype
 
108
        self.type = type
121
109
        self.port = port
122
 
        self.TXT = TXT if TXT is not None else []
 
110
        if TXT is None:
 
111
            self.TXT = []
 
112
        else:
 
113
            self.TXT = TXT
123
114
        self.domain = domain
124
115
        self.host = host
125
116
        self.rename_count = 0
126
 
        self.max_renames = max_renames
127
117
    def rename(self):
128
118
        """Derived from the Avahi example code"""
129
119
        if self.rename_count >= self.max_renames:
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))
 
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)
140
125
        self.remove()
141
126
        self.add()
142
127
        self.rename_count += 1
148
133
        """Derived from the Avahi example code"""
149
134
        global group
150
135
        if group is None:
151
 
            group = dbus.Interface(bus.get_object
152
 
                                   (avahi.DBUS_NAME,
 
136
            group = dbus.Interface\
 
137
                    (bus.get_object(avahi.DBUS_NAME,
153
138
                                    server.EntryGroupNew()),
154
 
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
139
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
155
140
            group.connect_to_signal('StateChanged',
156
141
                                    entry_group_state_changed)
157
 
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
142
        logger.debug(u"Adding service '%s' of type '%s' ...",
158
143
                     service.name, service.type)
159
144
        group.AddService(
160
145
                self.interface,         # interface
171
156
# End of Avahi example code
172
157
 
173
158
 
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):
 
159
class Client(object):
180
160
    """A representation of a client host served by this server.
181
161
    Attributes:
182
 
    name:       string; from the config file, used in log messages and
183
 
                        D-Bus identifiers
 
162
    name:      string; from the config file, used in log messages
184
163
    fingerprint: string (40 or 32 hexadecimal digits); used to
185
164
                 uniquely identify the client
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.
 
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.
199
176
    checker_initiator_tag: a gobject event source tag, or None
200
 
    disable_initiator_tag:    - '' -
 
177
    stop_initiator_tag:    - '' -
201
178
    checker_callback_tag:  - '' -
202
179
    checker_command: string; External command which is run to check if
203
180
                     client lives.  %() expansions are done at
204
181
                     runtime with vars(self) as dict, so that for
205
182
                     instance %(name)s can be used in the command.
206
 
    use_dbus: bool(); Whether to provide D-Bus interface and signals
207
 
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
 
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: - '' -
208
188
    """
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):
 
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={}):
223
213
        """Note: the 'checker' key in 'config' sets the
224
214
        'checker_command' attribute and *not* the 'checker'
225
215
        attribute."""
226
216
        self.name = name
227
 
        if config is None:
228
 
            config = {}
229
217
        logger.debug(u"Creating client %r", self.name)
230
 
        self.use_dbus = False   # During __init__
231
218
        # Uppercase and remove spaces from fingerprint for later
232
219
        # comparison purposes with return value from the fingerprint()
233
220
        # function
234
 
        self.fingerprint = (config["fingerprint"].upper()
235
 
                            .replace(u" ", u""))
 
221
        self.fingerprint = config["fingerprint"].upper()\
 
222
                           .replace(u" ", u"")
236
223
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
237
224
        if "secret" in config:
238
225
            self.secret = config["secret"].decode(u"base64")
239
226
        elif "secfile" in config:
240
 
            with closing(open(os.path.expanduser
241
 
                              (os.path.expandvars
242
 
                               (config["secfile"])))) as secfile:
243
 
                self.secret = secfile.read()
 
227
            sf = open(config["secfile"])
 
228
            self.secret = sf.read()
 
229
            sf.close()
244
230
        else:
245
231
            raise TypeError(u"No secret or secfile for client %s"
246
232
                            % self.name)
247
 
        self.host = config.get("host", "")
248
 
        self.created = datetime.datetime.utcnow()
249
 
        self.enabled = False
250
 
        self.last_enabled = None
 
233
        self.fqdn = config.get("fqdn", "")
 
234
        self.created = datetime.datetime.now()
251
235
        self.last_checked_ok = None
252
236
        self.timeout = string_to_delta(config["timeout"])
253
237
        self.interval = string_to_delta(config["interval"])
254
 
        self.disable_hook = disable_hook
 
238
        self.stop_hook = stop_hook
255
239
        self.checker = None
256
240
        self.checker_initiator_tag = None
257
 
        self.disable_initiator_tag = None
 
241
        self.stop_initiator_tag = None
258
242
        self.checker_callback_tag = None
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):
 
243
        self.check_command = config["checker"]
 
244
    def start(self):
272
245
        """Start this client's checker and timeout hooks"""
273
 
        self.last_enabled = datetime.datetime.utcnow()
274
246
        # Schedule a new checker to be started an 'interval' from now,
275
247
        # and every interval from then on.
276
 
        self.checker_initiator_tag = (gobject.timeout_add
277
 
                                      (self.interval_milliseconds(),
278
 
                                       self.start_checker))
 
248
        self.checker_initiator_tag = gobject.timeout_add\
 
249
                                     (self._interval_milliseconds,
 
250
                                      self.start_checker)
279
251
        # Also start a new checker *right now*.
280
252
        self.start_checker()
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):
 
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:
297
266
            return False
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
 
267
        if getattr(self, "stop_initiator_tag", False):
 
268
            gobject.source_remove(self.stop_initiator_tag)
 
269
            self.stop_initiator_tag = None
302
270
        if getattr(self, "checker_initiator_tag", False):
303
271
            gobject.source_remove(self.checker_initiator_tag)
304
272
            self.checker_initiator_tag = None
305
273
        self.stop_checker()
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))
 
274
        if self.stop_hook:
 
275
            self.stop_hook(self)
313
276
        # Do not run this again if called by a gobject.timeout_add
314
277
        return False
315
 
    
316
278
    def __del__(self):
317
 
        self.disable_hook = None
318
 
        self.disable()
319
 
    
320
 
    def checker_callback(self, pid, condition, command):
 
279
        self.stop_hook = None
 
280
        self.stop()
 
281
    def checker_callback(self, pid, condition):
321
282
        """The checker has completed, so take appropriate actions."""
 
283
        now = datetime.datetime.now()
322
284
        self.checker_callback_tag = None
323
285
        self.checker = None
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:
 
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):
343
296
            logger.warning(u"Checker for %(name)s crashed?",
344
297
                           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
 
    
 
298
        else:
 
299
            logger.info(u"Checker for %(name)s failed",
 
300
                        vars(self))
368
301
    def start_checker(self):
369
302
        """Start a new checker subprocess if one is not running.
370
303
        If a checker already exists, leave it running and do
379
312
        # is as it should be.
380
313
        if self.checker is None:
381
314
            try:
382
 
                # In case checker_command has exactly one % operator
383
 
                command = self.checker_command % self.host
 
315
                # In case check_command has exactly one % operator
 
316
                command = self.check_command % self.fqdn
384
317
            except TypeError:
385
318
                # Escape attributes for the shell
386
319
                escaped_attrs = dict((key, re.escape(str(val)))
387
320
                                     for key, val in
388
321
                                     vars(self).iteritems())
389
322
                try:
390
 
                    command = self.checker_command % escaped_attrs
 
323
                    command = self.check_command % escaped_attrs
391
324
                except TypeError, error:
392
325
                    logger.error(u'Could not format string "%s":'
393
 
                                 u' %s', self.checker_command, error)
 
326
                                 u' %s', self.check_command, error)
394
327
                    return True # Try again later
395
328
            try:
396
329
                logger.info(u"Starting checker %r for %s",
397
330
                            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.)
402
331
                self.checker = subprocess.Popen(command,
403
332
                                                close_fds=True,
404
333
                                                shell=True, cwd="/")
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
 
                # The checker may have completed before the gobject
416
 
                # watch was added.  Check for this.
417
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
418
 
                if pid:
419
 
                    gobject.source_remove(self.checker_callback_tag)
420
 
                    self.checker_callback(pid, status, command)
421
 
            except OSError, error:
 
334
                self.checker_callback_tag = gobject.child_watch_add\
 
335
                                            (self.checker.pid,
 
336
                                             self.checker_callback)
 
337
            except subprocess.OSError, error:
422
338
                logger.error(u"Failed to start subprocess: %s",
423
339
                             error)
424
340
        # Re-run this periodically if run by gobject.timeout_add
425
341
        return True
426
 
    
427
342
    def stop_checker(self):
428
343
        """Force the checker process, if any, to stop."""
429
344
        if self.checker_callback_tag:
431
346
            self.checker_callback_tag = None
432
347
        if getattr(self, "checker", None) is None:
433
348
            return
434
 
        logger.debug(u"Stopping checker for %(name)s", vars(self))
 
349
        logger.debug("Stopping checker for %(name)s", vars(self))
435
350
        try:
436
351
            os.kill(self.checker.pid, signal.SIGTERM)
437
352
            #os.sleep(0.5)
441
356
            if error.errno != errno.ESRCH: # No such process
442
357
                raise
443
358
        self.checker = None
444
 
        if self.use_dbus:
445
 
            self.PropertyChanged(dbus.String(u"checker_running"),
446
 
                                 dbus.Boolean(False, variant_level=1))
447
 
    
448
359
    def still_valid(self):
449
360
        """Has the timeout not yet passed for this client?"""
450
 
        if not getattr(self, "enabled", False):
451
 
            return False
452
 
        now = datetime.datetime.utcnow()
 
361
        now = datetime.datetime.now()
453
362
        if self.last_checked_ok is None:
454
363
            return now < (self.created + self.timeout)
455
364
        else:
456
365
            return now < (self.last_checked_ok + self.timeout)
457
 
    
458
 
    ## D-Bus methods & signals
459
 
    _interface = u"se.bsnet.fukt.Mandos.Client"
460
 
    
461
 
    # CheckedOK - method
462
 
    CheckedOK = dbus.service.method(_interface)(checked_ok)
463
 
    CheckedOK.__name__ = "CheckedOK"
464
 
    
465
 
    # CheckerCompleted - signal
466
 
    @dbus.service.signal(_interface, signature="nxs")
467
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
468
 
        "D-Bus signal"
469
 
        pass
470
 
    
471
 
    # CheckerStarted - signal
472
 
    @dbus.service.signal(_interface, signature="s")
473
 
    def CheckerStarted(self, command):
474
 
        "D-Bus signal"
475
 
        pass
476
 
    
477
 
    # GetAllProperties - method
478
 
    @dbus.service.method(_interface, out_signature="a{sv}")
479
 
    def GetAllProperties(self):
480
 
        "D-Bus method"
481
 
        return dbus.Dictionary({
482
 
                dbus.String("name"):
483
 
                    dbus.String(self.name, variant_level=1),
484
 
                dbus.String("fingerprint"):
485
 
                    dbus.String(self.fingerprint, variant_level=1),
486
 
                dbus.String("host"):
487
 
                    dbus.String(self.host, variant_level=1),
488
 
                dbus.String("created"):
489
 
                    _datetime_to_dbus(self.created, variant_level=1),
490
 
                dbus.String("last_enabled"):
491
 
                    (_datetime_to_dbus(self.last_enabled,
492
 
                                       variant_level=1)
493
 
                     if self.last_enabled is not None
494
 
                     else dbus.Boolean(False, variant_level=1)),
495
 
                dbus.String("enabled"):
496
 
                    dbus.Boolean(self.enabled, variant_level=1),
497
 
                dbus.String("last_checked_ok"):
498
 
                    (_datetime_to_dbus(self.last_checked_ok,
499
 
                                       variant_level=1)
500
 
                     if self.last_checked_ok is not None
501
 
                     else dbus.Boolean (False, variant_level=1)),
502
 
                dbus.String("timeout"):
503
 
                    dbus.UInt64(self.timeout_milliseconds(),
504
 
                                variant_level=1),
505
 
                dbus.String("interval"):
506
 
                    dbus.UInt64(self.interval_milliseconds(),
507
 
                                variant_level=1),
508
 
                dbus.String("checker"):
509
 
                    dbus.String(self.checker_command,
510
 
                                variant_level=1),
511
 
                dbus.String("checker_running"):
512
 
                    dbus.Boolean(self.checker is not None,
513
 
                                 variant_level=1),
514
 
                dbus.String("object_path"):
515
 
                    dbus.ObjectPath(self.dbus_object_path,
516
 
                                    variant_level=1)
517
 
                }, signature="sv")
518
 
    
519
 
    # IsStillValid - method
520
 
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
521
 
                    (still_valid))
522
 
    IsStillValid.__name__ = "IsStillValid"
523
 
    
524
 
    # PropertyChanged - signal
525
 
    @dbus.service.signal(_interface, signature="sv")
526
 
    def PropertyChanged(self, property, value):
527
 
        "D-Bus signal"
528
 
        pass
529
 
    
530
 
    # SetChecker - method
531
 
    @dbus.service.method(_interface, in_signature="s")
532
 
    def SetChecker(self, checker):
533
 
        "D-Bus setter method"
534
 
        self.checker_command = checker
535
 
        # Emit D-Bus signal
536
 
        self.PropertyChanged(dbus.String(u"checker"),
537
 
                             dbus.String(self.checker_command,
538
 
                                         variant_level=1))
539
 
    
540
 
    # SetHost - method
541
 
    @dbus.service.method(_interface, in_signature="s")
542
 
    def SetHost(self, host):
543
 
        "D-Bus setter method"
544
 
        self.host = host
545
 
        # Emit D-Bus signal
546
 
        self.PropertyChanged(dbus.String(u"host"),
547
 
                             dbus.String(self.host, variant_level=1))
548
 
    
549
 
    # SetInterval - method
550
 
    @dbus.service.method(_interface, in_signature="t")
551
 
    def SetInterval(self, milliseconds):
552
 
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
553
 
        # Emit D-Bus signal
554
 
        self.PropertyChanged(dbus.String(u"interval"),
555
 
                             (dbus.UInt64(self.interval_milliseconds(),
556
 
                                          variant_level=1)))
557
 
    
558
 
    # SetSecret - method
559
 
    @dbus.service.method(_interface, in_signature="ay",
560
 
                         byte_arrays=True)
561
 
    def SetSecret(self, secret):
562
 
        "D-Bus setter method"
563
 
        self.secret = str(secret)
564
 
    
565
 
    # SetTimeout - method
566
 
    @dbus.service.method(_interface, in_signature="t")
567
 
    def SetTimeout(self, milliseconds):
568
 
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
569
 
        # Emit D-Bus signal
570
 
        self.PropertyChanged(dbus.String(u"timeout"),
571
 
                             (dbus.UInt64(self.timeout_milliseconds(),
572
 
                                          variant_level=1)))
573
 
    
574
 
    # Enable - method
575
 
    Enable = dbus.service.method(_interface)(enable)
576
 
    Enable.__name__ = "Enable"
577
 
    
578
 
    # StartChecker - method
579
 
    @dbus.service.method(_interface)
580
 
    def StartChecker(self):
581
 
        "D-Bus method"
582
 
        self.start_checker()
583
 
    
584
 
    # Disable - method
585
 
    @dbus.service.method(_interface)
586
 
    def Disable(self):
587
 
        "D-Bus method"
588
 
        self.disable()
589
 
    
590
 
    # StopChecker - method
591
 
    StopChecker = dbus.service.method(_interface)(stop_checker)
592
 
    StopChecker.__name__ = "StopChecker"
593
 
    
594
 
    del _interface
595
366
 
596
367
 
597
368
def peer_certificate(session):
598
369
    "Return the peer's OpenPGP certificate as a bytestring"
599
370
    # If not an OpenPGP certificate...
600
 
    if (gnutls.library.functions
601
 
        .gnutls_certificate_type_get(session._c_object)
602
 
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
371
    if gnutls.library.functions.gnutls_certificate_type_get\
 
372
            (session._c_object) \
 
373
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
603
374
        # ...do the normal thing
604
375
        return session.peer_certificate
605
 
    list_size = ctypes.c_uint(1)
606
 
    cert_list = (gnutls.library.functions
607
 
                 .gnutls_certificate_get_peers
608
 
                 (session._c_object, ctypes.byref(list_size)))
609
 
    if not bool(cert_list) and list_size.value != 0:
610
 
        raise gnutls.errors.GNUTLSError("error getting peer"
611
 
                                        " 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))
612
379
    if list_size.value == 0:
613
380
        return None
614
381
    cert = cert_list[0]
618
385
def fingerprint(openpgp):
619
386
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
620
387
    # New GnuTLS "datum" with the OpenPGP public key
621
 
    datum = (gnutls.library.types
622
 
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
623
 
                                         ctypes.POINTER
624
 
                                         (ctypes.c_ubyte)),
625
 
                             ctypes.c_uint(len(openpgp))))
 
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)))
626
392
    # New empty GnuTLS certificate
627
393
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
628
 
    (gnutls.library.functions
629
 
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
394
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
395
        (ctypes.byref(crt))
630
396
    # Import the OpenPGP public key into the certificate
631
 
    (gnutls.library.functions
632
 
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
633
 
                                gnutls.library.constants
634
 
                                .GNUTLS_OPENPGP_FMT_RAW))
635
 
    # Verify the self signature in the key
636
 
    crtverify = ctypes.c_uint()
637
 
    (gnutls.library.functions
638
 
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
639
 
    if crtverify.value != 0:
640
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
641
 
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
397
    gnutls.library.functions.gnutls_openpgp_crt_import\
 
398
                    (crt, ctypes.byref(datum),
 
399
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
642
400
    # New buffer for the fingerprint
643
 
    buf = ctypes.create_string_buffer(20)
644
 
    buf_len = ctypes.c_size_t()
 
401
    buffer = ctypes.create_string_buffer(20)
 
402
    buffer_length = ctypes.c_size_t()
645
403
    # Get the fingerprint from the certificate into the buffer
646
 
    (gnutls.library.functions
647
 
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
648
 
                                         ctypes.byref(buf_len)))
 
404
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
405
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
649
406
    # Deinit the certificate
650
407
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
651
408
    # Convert the buffer to a Python bytestring
652
 
    fpr = ctypes.string_at(buf, buf_len.value)
 
409
    fpr = ctypes.string_at(buffer, buffer_length.value)
653
410
    # Convert the bytestring to hexadecimal notation
654
411
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
655
412
    return hex_fpr
656
413
 
657
414
 
658
 
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
415
class tcp_handler(SocketServer.BaseRequestHandler, object):
659
416
    """A TCP request handler class.
660
417
    Instantiated by IPv6_TCPServer for each request to handle it.
661
418
    Note: This will run in its own forked process."""
662
419
    
663
420
    def handle(self):
664
421
        logger.info(u"TCP connection from: %s",
665
 
                    unicode(self.client_address))
666
 
        session = (gnutls.connection
667
 
                   .ClientSession(self.request,
668
 
                                  gnutls.connection
669
 
                                  .X509Credentials()))
 
422
                     unicode(self.client_address))
 
423
        session = gnutls.connection.ClientSession\
 
424
                  (self.request, gnutls.connection.X509Credentials())
670
425
        
671
426
        line = self.request.makefile().readline()
672
427
        logger.debug(u"Protocol version: %r", line)
683
438
        # using OpenPGP certificates.
684
439
        
685
440
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
686
 
        #                     "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
687
 
        #                     "+DHE-DSS"))
688
 
        # Use a fallback default, since this MUST be set.
689
 
        priority = self.server.settings.get("priority", "NORMAL")
690
 
        (gnutls.library.functions
691
 
         .gnutls_priority_set_direct(session._c_object,
692
 
                                     priority, None))
 
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);
693
449
        
694
450
        try:
695
451
            session.handshake()
698
454
            # Do not run session.bye() here: the session is not
699
455
            # established.  Just abandon the request.
700
456
            return
701
 
        logger.debug(u"Handshake succeeded")
702
457
        try:
703
458
            fpr = fingerprint(peer_certificate(session))
704
459
        except (TypeError, gnutls.errors.GNUTLSError), error:
706
461
            session.bye()
707
462
            return
708
463
        logger.debug(u"Fingerprint: %s", fpr)
709
 
        
 
464
        client = None
710
465
        for c in self.server.clients:
711
466
            if c.fingerprint == fpr:
712
467
                client = c
713
468
                break
714
 
        else:
 
469
        if not client:
715
470
            logger.warning(u"Client not found for fingerprint: %s",
716
471
                           fpr)
717
472
            session.bye()
724
479
                           vars(client))
725
480
            session.bye()
726
481
            return
727
 
        ## This won't work here, since we're in a fork.
728
 
        # client.checked_ok()
729
482
        sent_size = 0
730
483
        while sent_size < len(client.secret):
731
484
            sent = session.send(client.secret[sent_size:])
736
489
        session.bye()
737
490
 
738
491
 
739
 
class IPv6_TCPServer(SocketServer.ForkingMixIn,
740
 
                     SocketServer.TCPServer, object):
 
492
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
741
493
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
742
494
    Attributes:
743
495
        settings:       Server settings
744
496
        clients:        Set() of Client objects
745
 
        enabled:        Boolean; whether this server is activated yet
746
497
    """
747
498
    address_family = socket.AF_INET6
748
499
    def __init__(self, *args, **kwargs):
752
503
        if "clients" in kwargs:
753
504
            self.clients = kwargs["clients"]
754
505
            del kwargs["clients"]
755
 
        self.enabled = False
756
 
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
 
506
        return super(type(self), self).__init__(*args, **kwargs)
757
507
    def server_bind(self):
758
508
        """This overrides the normal server_bind() function
759
509
        to bind to an interface if one was specified, and also NOT to
771
521
                                 u" bind to interface %s",
772
522
                                 self.settings["interface"])
773
523
                else:
774
 
                    raise
 
524
                    raise error
775
525
        # Only bind(2) the socket if we really need to.
776
526
        if self.server_address[0] or self.server_address[1]:
777
527
            if not self.server_address[0]:
778
528
                in6addr_any = "::"
779
529
                self.server_address = (in6addr_any,
780
530
                                       self.server_address[1])
781
 
            elif not self.server_address[1]:
 
531
            elif self.server_address[1] is None:
782
532
                self.server_address = (self.server_address[0],
783
533
                                       0)
784
 
#                 if self.settings["interface"]:
785
 
#                     self.server_address = (self.server_address[0],
786
 
#                                            0, # port
787
 
#                                            0, # flowinfo
788
 
#                                            if_nametoindex
789
 
#                                            (self.settings
790
 
#                                             ["interface"]))
791
 
            return super(IPv6_TCPServer, self).server_bind()
792
 
    def server_activate(self):
793
 
        if self.enabled:
794
 
            return super(IPv6_TCPServer, self).server_activate()
795
 
    def enable(self):
796
 
        self.enabled = True
 
534
            return super(type(self), self).server_bind()
797
535
 
798
536
 
799
537
def string_to_delta(interval):
800
538
    """Parse a string and return a datetime.timedelta
801
 
    
 
539
 
802
540
    >>> string_to_delta('7d')
803
541
    datetime.timedelta(7)
804
542
    >>> string_to_delta('60s')
809
547
    datetime.timedelta(1)
810
548
    >>> string_to_delta(u'1w')
811
549
    datetime.timedelta(7)
812
 
    >>> string_to_delta('5m 30s')
813
 
    datetime.timedelta(0, 330)
814
550
    """
815
 
    timevalue = datetime.timedelta(0)
816
 
    for s in interval.split():
817
 
        try:
818
 
            suffix = unicode(s[-1])
819
 
            value = int(s[:-1])
820
 
            if suffix == u"d":
821
 
                delta = datetime.timedelta(value)
822
 
            elif suffix == u"s":
823
 
                delta = datetime.timedelta(0, value)
824
 
            elif suffix == u"m":
825
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
826
 
            elif suffix == u"h":
827
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
828
 
            elif suffix == u"w":
829
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
830
 
            else:
831
 
                raise ValueError
832
 
        except (ValueError, IndexError):
 
551
    try:
 
552
        suffix=unicode(interval[-1])
 
553
        value=int(interval[:-1])
 
554
        if suffix == u"d":
 
555
            delta = datetime.timedelta(value)
 
556
        elif suffix == u"s":
 
557
            delta = datetime.timedelta(0, value)
 
558
        elif suffix == u"m":
 
559
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
560
        elif suffix == u"h":
 
561
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
562
        elif suffix == u"w":
 
563
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
564
        else:
833
565
            raise ValueError
834
 
        timevalue += delta
835
 
    return timevalue
 
566
    except (ValueError, IndexError):
 
567
        raise ValueError
 
568
    return delta
836
569
 
837
570
 
838
571
def server_state_changed(state):
839
572
    """Derived from the Avahi example code"""
840
573
    if state == avahi.SERVER_COLLISION:
841
 
        logger.error(u"Zeroconf server name collision")
 
574
        logger.error(u"Server name collision")
842
575
        service.remove()
843
576
    elif state == avahi.SERVER_RUNNING:
844
577
        service.add()
846
579
 
847
580
def entry_group_state_changed(state, error):
848
581
    """Derived from the Avahi example code"""
849
 
    logger.debug(u"Avahi state change: %i", state)
 
582
    logger.debug(u"state change: %i", state)
850
583
    
851
584
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
852
 
        logger.debug(u"Zeroconf service established.")
 
585
        logger.debug(u"Service established.")
853
586
    elif state == avahi.ENTRY_GROUP_COLLISION:
854
 
        logger.warning(u"Zeroconf service name collision.")
 
587
        logger.warning(u"Service name collision.")
855
588
        service.rename()
856
589
    elif state == avahi.ENTRY_GROUP_FAILURE:
857
 
        logger.critical(u"Avahi: Error in group state changed %s",
 
590
        logger.critical(u"Error in group state changed %s",
858
591
                        unicode(error))
859
 
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
 
592
        raise AvahiGroupError("State changed: %s", str(error))
860
593
 
861
594
def if_nametoindex(interface):
862
595
    """Call the C function if_nametoindex(), or equivalent"""
863
596
    global if_nametoindex
864
597
    try:
865
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
866
 
                          (ctypes.util.find_library("c"))
867
 
                          .if_nametoindex)
 
598
        if "ctypes.util" not in sys.modules:
 
599
            import ctypes.util
 
600
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
601
            (ctypes.util.find_library("c")).if_nametoindex
868
602
    except (OSError, AttributeError):
869
603
        if "struct" not in sys.modules:
870
604
            import struct
873
607
        def if_nametoindex(interface):
874
608
            "Get an interface index the hard way, i.e. using fcntl()"
875
609
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
876
 
            with closing(socket.socket()) as s:
877
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
878
 
                                    struct.pack("16s16x", interface))
 
610
            s = socket.socket()
 
611
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
612
                                struct.pack("16s16x", interface))
 
613
            s.close()
879
614
            interface_index = struct.unpack("I", ifreq[16:20])[0]
880
615
            return interface_index
881
616
    return if_nametoindex(interface)
905
640
 
906
641
 
907
642
def main():
908
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
643
    global main_loop_started
 
644
    main_loop_started = False
 
645
    
 
646
    parser = OptionParser()
909
647
    parser.add_option("-i", "--interface", type="string",
910
648
                      metavar="IF", help="Bind to interface IF")
911
649
    parser.add_option("-a", "--address", type="string",
912
650
                      help="Address to listen for requests on")
913
651
    parser.add_option("-p", "--port", type="int",
914
652
                      help="Port number to receive requests on")
915
 
    parser.add_option("--check", action="store_true",
 
653
    parser.add_option("--check", action="store_true", default=False,
916
654
                      help="Run self-test")
917
 
    parser.add_option("--debug", action="store_true",
 
655
    parser.add_option("--debug", action="store_true", default=False,
918
656
                      help="Debug mode; run in foreground and log to"
919
657
                      " terminal")
920
658
    parser.add_option("--priority", type="string", help="GnuTLS"
925
663
                      default="/etc/mandos", metavar="DIR",
926
664
                      help="Directory to search for configuration"
927
665
                      " files")
928
 
    parser.add_option("--no-dbus", action="store_false",
929
 
                      dest="use_dbus",
930
 
                      help="Do not provide D-Bus system bus"
931
 
                      " interface")
932
 
    options = parser.parse_args()[0]
 
666
    (options, args) = parser.parse_args()
933
667
    
934
668
    if options.check:
935
669
        import doctest
944
678
                        "priority":
945
679
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
946
680
                        "servicename": "Mandos",
947
 
                        "use_dbus": "True",
948
681
                        }
949
682
    
950
683
    # Parse config file for server-global settings
951
684
    server_config = ConfigParser.SafeConfigParser(server_defaults)
952
685
    del server_defaults
953
686
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
687
    server_section = "server"
954
688
    # Convert the SafeConfigParser object to a dict
955
 
    server_settings = server_config.defaults()
956
 
    # Use the appropriate methods on the non-string config options
957
 
    server_settings["debug"] = server_config.getboolean("DEFAULT",
958
 
                                                        "debug")
959
 
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
960
 
                                                           "use_dbus")
961
 
    if server_settings["port"]:
962
 
        server_settings["port"] = server_config.getint("DEFAULT",
963
 
                                                       "port")
 
689
    server_settings = dict(server_config.items(server_section))
 
690
    # Use getboolean on the boolean config option
 
691
    server_settings["debug"] = server_config.getboolean\
 
692
                               (server_section, "debug")
964
693
    del server_config
965
694
    
966
695
    # Override the settings from the config file with command line
967
696
    # options, if set.
968
697
    for option in ("interface", "address", "port", "debug",
969
 
                   "priority", "servicename", "configdir",
970
 
                   "use_dbus"):
 
698
                   "priority", "servicename", "configdir"):
971
699
        value = getattr(options, option)
972
700
        if value is not None:
973
701
            server_settings[option] = value
974
702
    del options
975
703
    # Now we have our good server settings in "server_settings"
976
704
    
977
 
    # For convenience
978
 
    debug = server_settings["debug"]
979
 
    use_dbus = server_settings["use_dbus"]
980
 
    
981
 
    if not debug:
982
 
        syslogger.setLevel(logging.WARNING)
983
 
        console.setLevel(logging.WARNING)
984
 
    
985
 
    if server_settings["servicename"] != "Mandos":
986
 
        syslogger.setFormatter(logging.Formatter
987
 
                               ('Mandos (%s): %%(levelname)s:'
988
 
                                ' %%(message)s'
989
 
                                % server_settings["servicename"]))
990
 
    
991
705
    # Parse config file with clients
992
706
    client_defaults = { "timeout": "1h",
993
707
                        "interval": "5m",
994
 
                        "checker": "fping -q -- %%(host)s",
995
 
                        "host": "",
 
708
                        "checker": "fping -q -- %%(fqdn)s",
996
709
                        }
997
710
    client_config = ConfigParser.SafeConfigParser(client_defaults)
998
711
    client_config.read(os.path.join(server_settings["configdir"],
999
712
                                    "clients.conf"))
1000
713
    
1001
 
    clients = Set()
1002
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
1003
 
                                 server_settings["port"]),
1004
 
                                TCP_handler,
1005
 
                                settings=server_settings,
1006
 
                                clients=clients)
1007
 
    pidfilename = "/var/run/mandos.pid"
1008
 
    try:
1009
 
        pidfile = open(pidfilename, "w")
1010
 
    except IOError:
1011
 
        logger.error("Could not open file %r", pidfilename)
1012
 
    
1013
 
    try:
1014
 
        uid = pwd.getpwnam("_mandos").pw_uid
1015
 
        gid = pwd.getpwnam("_mandos").pw_gid
1016
 
    except KeyError:
1017
 
        try:
1018
 
            uid = pwd.getpwnam("mandos").pw_uid
1019
 
            gid = pwd.getpwnam("mandos").pw_gid
1020
 
        except KeyError:
1021
 
            try:
1022
 
                uid = pwd.getpwnam("nobody").pw_uid
1023
 
                gid = pwd.getpwnam("nogroup").pw_gid
1024
 
            except KeyError:
1025
 
                uid = 65534
1026
 
                gid = 65534
1027
 
    try:
1028
 
        os.setgid(gid)
1029
 
        os.setuid(uid)
1030
 
    except OSError, error:
1031
 
        if error[0] != errno.EPERM:
1032
 
            raise error
1033
 
    
1034
 
    # Enable all possible GnuTLS debugging
1035
 
    if debug:
1036
 
        # "Use a log level over 10 to enable all debugging options."
1037
 
        # - GnuTLS manual
1038
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1039
 
        
1040
 
        @gnutls.library.types.gnutls_log_func
1041
 
        def debug_gnutls(level, string):
1042
 
            logger.debug("GnuTLS: %s", string[:-1])
1043
 
        
1044
 
        (gnutls.library.functions
1045
 
         .gnutls_global_set_log_function(debug_gnutls))
1046
 
    
1047
714
    global service
1048
715
    service = AvahiService(name = server_settings["servicename"],
1049
 
                           servicetype = "_mandos._tcp", )
 
716
                           type = "_mandos._tcp", );
1050
717
    if server_settings["interface"]:
1051
 
        service.interface = (if_nametoindex
1052
 
                             (server_settings["interface"]))
 
718
        service.interface = if_nametoindex(server_settings["interface"])
1053
719
    
1054
720
    global main_loop
1055
721
    global bus
1058
724
    DBusGMainLoop(set_as_default=True )
1059
725
    main_loop = gobject.MainLoop()
1060
726
    bus = dbus.SystemBus()
1061
 
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1062
 
                                           avahi.DBUS_PATH_SERVER),
1063
 
                            avahi.DBUS_INTERFACE_SERVER)
 
727
    server = dbus.Interface(
 
728
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
729
            avahi.DBUS_INTERFACE_SERVER )
1064
730
    # End of Avahi example code
1065
 
    if use_dbus:
1066
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
 
731
    
 
732
    debug = server_settings["debug"]
 
733
    
 
734
    if debug:
 
735
        console = logging.StreamHandler()
 
736
        # console.setLevel(logging.DEBUG)
 
737
        console.setFormatter(logging.Formatter\
 
738
                             ('%(levelname)s: %(message)s'))
 
739
        logger.addHandler(console)
 
740
        del console
 
741
    
 
742
    clients = Set()
 
743
    def remove_from_clients(client):
 
744
        clients.remove(client)
 
745
        if not clients:
 
746
            logger.critical(u"No clients left, exiting")
 
747
            sys.exit()
1067
748
    
1068
749
    clients.update(Set(Client(name = section,
 
750
                              stop_hook = remove_from_clients,
1069
751
                              config
1070
 
                              = dict(client_config.items(section)),
1071
 
                              use_dbus = use_dbus)
 
752
                              = dict(client_config.items(section)))
1072
753
                       for section in client_config.sections()))
1073
 
    if not clients:
1074
 
        logger.warning(u"No clients defined")
1075
754
    
1076
 
    if debug:
1077
 
        # Redirect stdin so all checkers get /dev/null
1078
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1079
 
        os.dup2(null, sys.stdin.fileno())
1080
 
        if null > 2:
1081
 
            os.close(null)
1082
 
    else:
1083
 
        # No console logging
1084
 
        logger.removeHandler(console)
1085
 
        # Close all input and output, do double fork, etc.
 
755
    if not debug:
1086
756
        daemon()
1087
757
    
1088
 
    try:
1089
 
        pid = os.getpid()
1090
 
        pidfile.write(str(pid) + "\n")
1091
 
        pidfile.close()
1092
 
        del pidfile
1093
 
    except IOError:
1094
 
        logger.error(u"Could not write to file %r with PID %d",
1095
 
                     pidfilename, pid)
1096
 
    except NameError:
1097
 
        # "pidfile" was never created
1098
 
        pass
1099
 
    del pidfilename
1100
 
    
1101
758
    def cleanup():
1102
759
        "Cleanup function; run on exit"
1103
760
        global group
1109
766
        
1110
767
        while clients:
1111
768
            client = clients.pop()
1112
 
            client.disable_hook = None
1113
 
            client.disable()
 
769
            client.stop_hook = None
 
770
            client.stop()
1114
771
    
1115
772
    atexit.register(cleanup)
1116
773
    
1119
776
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1120
777
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1121
778
    
1122
 
    if use_dbus:
1123
 
        class MandosServer(dbus.service.Object):
1124
 
            """A D-Bus proxy object"""
1125
 
            def __init__(self):
1126
 
                dbus.service.Object.__init__(self, bus, "/")
1127
 
            _interface = u"se.bsnet.fukt.Mandos"
1128
 
            
1129
 
            @dbus.service.signal(_interface, signature="oa{sv}")
1130
 
            def ClientAdded(self, objpath, properties):
1131
 
                "D-Bus signal"
1132
 
                pass
1133
 
            
1134
 
            @dbus.service.signal(_interface, signature="os")
1135
 
            def ClientRemoved(self, objpath, name):
1136
 
                "D-Bus signal"
1137
 
                pass
1138
 
            
1139
 
            @dbus.service.method(_interface, out_signature="ao")
1140
 
            def GetAllClients(self):
1141
 
                "D-Bus method"
1142
 
                return dbus.Array(c.dbus_object_path for c in clients)
1143
 
            
1144
 
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
1145
 
            def GetAllClientsWithProperties(self):
1146
 
                "D-Bus method"
1147
 
                return dbus.Dictionary(
1148
 
                    ((c.dbus_object_path, c.GetAllProperties())
1149
 
                     for c in clients),
1150
 
                    signature="oa{sv}")
1151
 
            
1152
 
            @dbus.service.method(_interface, in_signature="o")
1153
 
            def RemoveClient(self, object_path):
1154
 
                "D-Bus method"
1155
 
                for c in clients:
1156
 
                    if c.dbus_object_path == object_path:
1157
 
                        clients.remove(c)
1158
 
                        # Don't signal anything except ClientRemoved
1159
 
                        c.use_dbus = False
1160
 
                        c.disable()
1161
 
                        # Emit D-Bus signal
1162
 
                        self.ClientRemoved(object_path, c.name)
1163
 
                        return
1164
 
                raise KeyError
1165
 
            
1166
 
            del _interface
1167
 
        
1168
 
        mandos_server = MandosServer()
1169
 
    
1170
779
    for client in clients:
1171
 
        if use_dbus:
1172
 
            # Emit D-Bus signal
1173
 
            mandos_server.ClientAdded(client.dbus_object_path,
1174
 
                                      client.GetAllProperties())
1175
 
        client.enable()
1176
 
    
1177
 
    tcp_server.enable()
1178
 
    tcp_server.server_activate()
1179
 
    
 
780
        client.start()
 
781
    
 
782
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
783
                                 server_settings["port"]),
 
784
                                tcp_handler,
 
785
                                settings=server_settings,
 
786
                                clients=clients)
1180
787
    # Find out what port we got
1181
788
    service.port = tcp_server.socket.getsockname()[1]
1182
789
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1196
803
        
1197
804
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1198
805
                             lambda *args, **kwargs:
1199
 
                             (tcp_server.handle_request
1200
 
                              (*args[2:], **kwargs) or True))
 
806
                             tcp_server.handle_request\
 
807
                             (*args[2:], **kwargs) or True)
1201
808
        
1202
 
        logger.debug(u"Starting main loop")
 
809
        logger.debug("Starting main loop")
 
810
        main_loop_started = True
1203
811
        main_loop.run()
1204
812
    except AvahiError, error:
1205
 
        logger.critical(u"AvahiError: %s", error)
 
813
        logger.critical(u"AvahiError: %s" + unicode(error))
1206
814
        sys.exit(1)
1207
815
    except KeyboardInterrupt:
1208
816
        if debug:
1209
 
            print >> sys.stderr
1210
 
        logger.debug("Server received KeyboardInterrupt")
1211
 
    logger.debug("Server exiting")
 
817
            print
1212
818
 
1213
819
if __name__ == '__main__':
1214
820
    main()