/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2008-08-16 03:29:08 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080816032908-ihw7c05r2mnyk389
Add feature to specify custom environment variables for plugins.

* plugin-runner.c (plugin): New members "environ" and "envc" to
                            contain possible custom environment.
  (getplugin): Return NULL on failure instead of doing exit(); all
               callers changed.
  (add_to_char_array): New helper function for "add_argument" and
                       "add_environment".
  (addargument): Renamed to "add_argument".  Return bool.  Call
                 "add_to_char_array" to actually do things.
  (add_environment): New; analogous to "add_argument".
  (addcustomargument): Renamed to "add_to_argv" to avoid confusion
                       with "add_argument".
  (main): New options "--global-envs" and "--envs-for" to specify
          custom environment for plugins.  Print environment for
          plugins in debug mode.  Use asprintf instead of strcpy and
          strcat.  Use execve() for plugins with custom environments.
          Free environment for plugin when freeing plugin list.

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Lines of Context:
mandos
11
11
# and some lines in "main".
12
12
# 
13
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# Everything else is
14
 
# Copyright © 2008,2009 Teddy Hogeborn
15
 
# Copyright © 2008,2009 Björn Påhlsson
 
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
# 
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
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"
 
64
version = "1.0"
70
65
 
71
66
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'))
 
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'))
78
72
logger.addHandler(syslogger)
79
73
 
80
74
console = logging.StreamHandler()
81
 
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
 
                                       ' %(levelname)s: %(message)s'))
 
75
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
 
76
                                       ' %(message)s'))
83
77
logger.addHandler(console)
84
78
 
85
79
class AvahiError(Exception):
86
 
    def __init__(self, value, *args, **kwargs):
 
80
    def __init__(self, value):
87
81
        self.value = value
88
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
89
 
    def __unicode__(self):
90
 
        return unicode(repr(self.value))
 
82
    def __str__(self):
 
83
        return repr(self.value)
91
84
 
92
85
class AvahiServiceError(AvahiError):
93
86
    pass
113
106
                  a sensible number of times
114
107
    """
115
108
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
 
                 servicetype = None, port = None, TXT = None,
117
 
                 domain = "", host = "", max_renames = 32768):
 
109
                 type = None, port = None, TXT = None, domain = "",
 
110
                 host = "", max_renames = 32768):
118
111
        self.interface = interface
119
112
        self.name = name
120
 
        self.type = servicetype
 
113
        self.type = type
121
114
        self.port = port
122
 
        self.TXT = TXT if TXT is not None else []
 
115
        if TXT is None:
 
116
            self.TXT = []
 
117
        else:
 
118
            self.TXT = TXT
123
119
        self.domain = domain
124
120
        self.host = host
125
121
        self.rename_count = 0
127
123
    def rename(self):
128
124
        """Derived from the Avahi example code"""
129
125
        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")
 
126
            logger.critical(u"No suitable service name found after %i"
 
127
                            u" retries, exiting.", rename_count)
 
128
            raise AvahiServiceError("Too many renames")
134
129
        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
 
130
        logger.info(u"Changing name to %r ...", str(self.name))
 
131
        syslogger.setFormatter(logging.Formatter\
138
132
                               ('Mandos (%s): %%(levelname)s:'
139
 
                                ' %%(message)s' % self.name))
 
133
                               ' %%(message)s' % self.name))
140
134
        self.remove()
141
135
        self.add()
142
136
        self.rename_count += 1
148
142
        """Derived from the Avahi example code"""
149
143
        global group
150
144
        if group is None:
151
 
            group = dbus.Interface(bus.get_object
152
 
                                   (avahi.DBUS_NAME,
 
145
            group = dbus.Interface\
 
146
                    (bus.get_object(avahi.DBUS_NAME,
153
147
                                    server.EntryGroupNew()),
154
 
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
148
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
155
149
            group.connect_to_signal('StateChanged',
156
150
                                    entry_group_state_changed)
157
 
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
151
        logger.debug(u"Adding service '%s' of type '%s' ...",
158
152
                     service.name, service.type)
159
153
        group.AddService(
160
154
                self.interface,         # interface
171
165
# End of Avahi example code
172
166
 
173
167
 
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):
 
168
class Client(object):
180
169
    """A representation of a client host served by this server.
181
170
    Attributes:
182
 
    name:       string; from the config file, used in log messages and
183
 
                        D-Bus identifiers
 
171
    name:      string; from the config file, used in log messages
184
172
    fingerprint: string (40 or 32 hexadecimal digits); used to
185
173
                 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.
 
174
    secret:    bytestring; sent verbatim (over TLS) to client
 
175
    host:      string; available for use by the checker command
 
176
    created:   datetime.datetime(); object creation, not client host
 
177
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
178
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
179
                                     until this client is invalid
 
180
    interval:  datetime.timedelta(); How often to start a new checker
 
181
    stop_hook: If set, called by stop() as stop_hook(self)
 
182
    checker:   subprocess.Popen(); a running checker process used
 
183
                                   to see if the client lives.
 
184
                                   'None' if no process is running.
199
185
    checker_initiator_tag: a gobject event source tag, or None
200
 
    disable_initiator_tag:    - '' -
 
186
    stop_initiator_tag:    - '' -
201
187
    checker_callback_tag:  - '' -
202
188
    checker_command: string; External command which is run to check if
203
189
                     client lives.  %() expansions are done at
204
190
                     runtime with vars(self) as dict, so that for
205
191
                     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
 
192
    Private attibutes:
 
193
    _timeout: Real variable for 'timeout'
 
194
    _interval: Real variable for 'interval'
 
195
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
196
    _interval_milliseconds: - '' -
208
197
    """
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):
 
198
    def _set_timeout(self, timeout):
 
199
        "Setter function for 'timeout' attribute"
 
200
        self._timeout = timeout
 
201
        self._timeout_milliseconds = ((self.timeout.days
 
202
                                       * 24 * 60 * 60 * 1000)
 
203
                                      + (self.timeout.seconds * 1000)
 
204
                                      + (self.timeout.microseconds
 
205
                                         // 1000))
 
206
    timeout = property(lambda self: self._timeout,
 
207
                       _set_timeout)
 
208
    del _set_timeout
 
209
    def _set_interval(self, interval):
 
210
        "Setter function for 'interval' attribute"
 
211
        self._interval = interval
 
212
        self._interval_milliseconds = ((self.interval.days
 
213
                                        * 24 * 60 * 60 * 1000)
 
214
                                       + (self.interval.seconds
 
215
                                          * 1000)
 
216
                                       + (self.interval.microseconds
 
217
                                          // 1000))
 
218
    interval = property(lambda self: self._interval,
 
219
                        _set_interval)
 
220
    del _set_interval
 
221
    def __init__(self, name = None, stop_hook=None, config={}):
223
222
        """Note: the 'checker' key in 'config' sets the
224
223
        'checker_command' attribute and *not* the 'checker'
225
224
        attribute."""
226
225
        self.name = name
227
 
        if config is None:
228
 
            config = {}
229
226
        logger.debug(u"Creating client %r", self.name)
230
 
        self.use_dbus = False   # During __init__
231
227
        # Uppercase and remove spaces from fingerprint for later
232
228
        # comparison purposes with return value from the fingerprint()
233
229
        # function
234
 
        self.fingerprint = (config["fingerprint"].upper()
235
 
                            .replace(u" ", u""))
 
230
        self.fingerprint = config["fingerprint"].upper()\
 
231
                           .replace(u" ", u"")
236
232
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
237
233
        if "secret" in config:
238
234
            self.secret = config["secret"].decode(u"base64")
239
235
        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()
 
236
            sf = open(config["secfile"])
 
237
            self.secret = sf.read()
 
238
            sf.close()
244
239
        else:
245
240
            raise TypeError(u"No secret or secfile for client %s"
246
241
                            % self.name)
247
242
        self.host = config.get("host", "")
248
 
        self.created = datetime.datetime.utcnow()
249
 
        self.enabled = False
250
 
        self.last_enabled = None
 
243
        self.created = datetime.datetime.now()
251
244
        self.last_checked_ok = None
252
245
        self.timeout = string_to_delta(config["timeout"])
253
246
        self.interval = string_to_delta(config["interval"])
254
 
        self.disable_hook = disable_hook
 
247
        self.stop_hook = stop_hook
255
248
        self.checker = None
256
249
        self.checker_initiator_tag = None
257
 
        self.disable_initiator_tag = None
 
250
        self.stop_initiator_tag = None
258
251
        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):
 
252
        self.check_command = config["checker"]
 
253
    def start(self):
272
254
        """Start this client's checker and timeout hooks"""
273
 
        self.last_enabled = datetime.datetime.utcnow()
274
255
        # Schedule a new checker to be started an 'interval' from now,
275
256
        # and every interval from then on.
276
 
        self.checker_initiator_tag = (gobject.timeout_add
277
 
                                      (self.interval_milliseconds(),
278
 
                                       self.start_checker))
 
257
        self.checker_initiator_tag = gobject.timeout_add\
 
258
                                     (self._interval_milliseconds,
 
259
                                      self.start_checker)
279
260
        # Also start a new checker *right now*.
280
261
        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):
 
262
        # Schedule a stop() when 'timeout' has passed
 
263
        self.stop_initiator_tag = gobject.timeout_add\
 
264
                                  (self._timeout_milliseconds,
 
265
                                   self.stop)
 
266
    def stop(self):
 
267
        """Stop this client.
 
268
        The possibility that a client might be restarted is left open,
 
269
        but not currently used."""
 
270
        # If this client doesn't have a secret, it is already stopped.
 
271
        if hasattr(self, "secret") and self.secret:
 
272
            logger.info(u"Stopping client %s", self.name)
 
273
            self.secret = None
 
274
        else:
297
275
            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
 
276
        if getattr(self, "stop_initiator_tag", False):
 
277
            gobject.source_remove(self.stop_initiator_tag)
 
278
            self.stop_initiator_tag = None
302
279
        if getattr(self, "checker_initiator_tag", False):
303
280
            gobject.source_remove(self.checker_initiator_tag)
304
281
            self.checker_initiator_tag = None
305
282
        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))
 
283
        if self.stop_hook:
 
284
            self.stop_hook(self)
313
285
        # Do not run this again if called by a gobject.timeout_add
314
286
        return False
315
 
    
316
287
    def __del__(self):
317
 
        self.disable_hook = None
318
 
        self.disable()
319
 
    
320
 
    def checker_callback(self, pid, condition, command):
 
288
        self.stop_hook = None
 
289
        self.stop()
 
290
    def checker_callback(self, pid, condition):
321
291
        """The checker has completed, so take appropriate actions."""
 
292
        now = datetime.datetime.now()
322
293
        self.checker_callback_tag = None
323
294
        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:
 
295
        if os.WIFEXITED(condition) \
 
296
               and (os.WEXITSTATUS(condition) == 0):
 
297
            logger.info(u"Checker for %(name)s succeeded",
 
298
                        vars(self))
 
299
            self.last_checked_ok = now
 
300
            gobject.source_remove(self.stop_initiator_tag)
 
301
            self.stop_initiator_tag = gobject.timeout_add\
 
302
                                      (self._timeout_milliseconds,
 
303
                                       self.stop)
 
304
        elif not os.WIFEXITED(condition):
343
305
            logger.warning(u"Checker for %(name)s crashed?",
344
306
                           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
 
    
 
307
        else:
 
308
            logger.info(u"Checker for %(name)s failed",
 
309
                        vars(self))
368
310
    def start_checker(self):
369
311
        """Start a new checker subprocess if one is not running.
370
312
        If a checker already exists, leave it running and do
379
321
        # is as it should be.
380
322
        if self.checker is None:
381
323
            try:
382
 
                # In case checker_command has exactly one % operator
383
 
                command = self.checker_command % self.host
 
324
                # In case check_command has exactly one % operator
 
325
                command = self.check_command % self.host
384
326
            except TypeError:
385
327
                # Escape attributes for the shell
386
328
                escaped_attrs = dict((key, re.escape(str(val)))
387
329
                                     for key, val in
388
330
                                     vars(self).iteritems())
389
331
                try:
390
 
                    command = self.checker_command % escaped_attrs
 
332
                    command = self.check_command % escaped_attrs
391
333
                except TypeError, error:
392
334
                    logger.error(u'Could not format string "%s":'
393
 
                                 u' %s', self.checker_command, error)
 
335
                                 u' %s', self.check_command, error)
394
336
                    return True # Try again later
395
337
            try:
396
338
                logger.info(u"Starting checker %r for %s",
397
339
                            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
340
                self.checker = subprocess.Popen(command,
403
341
                                                close_fds=True,
404
342
                                                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:
 
343
                self.checker_callback_tag = gobject.child_watch_add\
 
344
                                            (self.checker.pid,
 
345
                                             self.checker_callback)
 
346
            except subprocess.OSError, error:
422
347
                logger.error(u"Failed to start subprocess: %s",
423
348
                             error)
424
349
        # Re-run this periodically if run by gobject.timeout_add
425
350
        return True
426
 
    
427
351
    def stop_checker(self):
428
352
        """Force the checker process, if any, to stop."""
429
353
        if self.checker_callback_tag:
441
365
            if error.errno != errno.ESRCH: # No such process
442
366
                raise
443
367
        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
368
    def still_valid(self):
449
369
        """Has the timeout not yet passed for this client?"""
450
 
        if not getattr(self, "enabled", False):
451
 
            return False
452
 
        now = datetime.datetime.utcnow()
 
370
        now = datetime.datetime.now()
453
371
        if self.last_checked_ok is None:
454
372
            return now < (self.created + self.timeout)
455
373
        else:
456
374
            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
375
 
596
376
 
597
377
def peer_certificate(session):
598
378
    "Return the peer's OpenPGP certificate as a bytestring"
599
379
    # 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):
 
380
    if gnutls.library.functions.gnutls_certificate_type_get\
 
381
            (session._c_object) \
 
382
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
603
383
        # ...do the normal thing
604
384
        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")
 
385
    list_size = ctypes.c_uint()
 
386
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
387
        (session._c_object, ctypes.byref(list_size))
612
388
    if list_size.value == 0:
613
389
        return None
614
390
    cert = cert_list[0]
618
394
def fingerprint(openpgp):
619
395
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
620
396
    # 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))))
 
397
    datum = gnutls.library.types.gnutls_datum_t\
 
398
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
399
                     ctypes.POINTER(ctypes.c_ubyte)),
 
400
         ctypes.c_uint(len(openpgp)))
626
401
    # New empty GnuTLS certificate
627
402
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
628
 
    (gnutls.library.functions
629
 
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
403
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
404
        (ctypes.byref(crt))
630
405
    # 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")
 
406
    gnutls.library.functions.gnutls_openpgp_crt_import\
 
407
                    (crt, ctypes.byref(datum),
 
408
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
642
409
    # New buffer for the fingerprint
643
 
    buf = ctypes.create_string_buffer(20)
644
 
    buf_len = ctypes.c_size_t()
 
410
    buffer = ctypes.create_string_buffer(20)
 
411
    buffer_length = ctypes.c_size_t()
645
412
    # 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)))
 
413
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
414
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
649
415
    # Deinit the certificate
650
416
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
651
417
    # Convert the buffer to a Python bytestring
652
 
    fpr = ctypes.string_at(buf, buf_len.value)
 
418
    fpr = ctypes.string_at(buffer, buffer_length.value)
653
419
    # Convert the bytestring to hexadecimal notation
654
420
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
655
421
    return hex_fpr
656
422
 
657
423
 
658
 
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
424
class tcp_handler(SocketServer.BaseRequestHandler, object):
659
425
    """A TCP request handler class.
660
426
    Instantiated by IPv6_TCPServer for each request to handle it.
661
427
    Note: This will run in its own forked process."""
662
428
    
663
429
    def handle(self):
664
430
        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()))
 
431
                     unicode(self.client_address))
 
432
        session = gnutls.connection.ClientSession\
 
433
                  (self.request, gnutls.connection.X509Credentials())
670
434
        
671
435
        line = self.request.makefile().readline()
672
436
        logger.debug(u"Protocol version: %r", line)
683
447
        # using OpenPGP certificates.
684
448
        
685
449
        #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))
 
450
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
451
        #                "+DHE-DSS"))
 
452
        priority = "NORMAL"             # Fallback default, since this
 
453
                                        # MUST be set.
 
454
        if self.server.settings["priority"]:
 
455
            priority = self.server.settings["priority"]
 
456
        gnutls.library.functions.gnutls_priority_set_direct\
 
457
            (session._c_object, priority, None);
693
458
        
694
459
        try:
695
460
            session.handshake()
698
463
            # Do not run session.bye() here: the session is not
699
464
            # established.  Just abandon the request.
700
465
            return
701
 
        logger.debug(u"Handshake succeeded")
702
466
        try:
703
467
            fpr = fingerprint(peer_certificate(session))
704
468
        except (TypeError, gnutls.errors.GNUTLSError), error:
706
470
            session.bye()
707
471
            return
708
472
        logger.debug(u"Fingerprint: %s", fpr)
709
 
        
 
473
        client = None
710
474
        for c in self.server.clients:
711
475
            if c.fingerprint == fpr:
712
476
                client = c
713
477
                break
714
 
        else:
 
478
        if not client:
715
479
            logger.warning(u"Client not found for fingerprint: %s",
716
480
                           fpr)
717
481
            session.bye()
724
488
                           vars(client))
725
489
            session.bye()
726
490
            return
727
 
        ## This won't work here, since we're in a fork.
728
 
        # client.checked_ok()
729
491
        sent_size = 0
730
492
        while sent_size < len(client.secret):
731
493
            sent = session.send(client.secret[sent_size:])
736
498
        session.bye()
737
499
 
738
500
 
739
 
class IPv6_TCPServer(SocketServer.ForkingMixIn,
740
 
                     SocketServer.TCPServer, object):
 
501
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
741
502
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
742
503
    Attributes:
743
504
        settings:       Server settings
744
505
        clients:        Set() of Client objects
745
 
        enabled:        Boolean; whether this server is activated yet
746
506
    """
747
507
    address_family = socket.AF_INET6
748
508
    def __init__(self, *args, **kwargs):
752
512
        if "clients" in kwargs:
753
513
            self.clients = kwargs["clients"]
754
514
            del kwargs["clients"]
755
 
        self.enabled = False
756
 
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
 
515
        return super(type(self), self).__init__(*args, **kwargs)
757
516
    def server_bind(self):
758
517
        """This overrides the normal server_bind() function
759
518
        to bind to an interface if one was specified, and also NOT to
771
530
                                 u" bind to interface %s",
772
531
                                 self.settings["interface"])
773
532
                else:
774
 
                    raise
 
533
                    raise error
775
534
        # Only bind(2) the socket if we really need to.
776
535
        if self.server_address[0] or self.server_address[1]:
777
536
            if not self.server_address[0]:
788
547
#                                            if_nametoindex
789
548
#                                            (self.settings
790
549
#                                             ["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
 
550
            return super(type(self), self).server_bind()
797
551
 
798
552
 
799
553
def string_to_delta(interval):
800
554
    """Parse a string and return a datetime.timedelta
801
 
    
 
555
 
802
556
    >>> string_to_delta('7d')
803
557
    datetime.timedelta(7)
804
558
    >>> string_to_delta('60s')
809
563
    datetime.timedelta(1)
810
564
    >>> string_to_delta(u'1w')
811
565
    datetime.timedelta(7)
812
 
    >>> string_to_delta('5m 30s')
813
 
    datetime.timedelta(0, 330)
814
566
    """
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):
 
567
    try:
 
568
        suffix=unicode(interval[-1])
 
569
        value=int(interval[:-1])
 
570
        if suffix == u"d":
 
571
            delta = datetime.timedelta(value)
 
572
        elif suffix == u"s":
 
573
            delta = datetime.timedelta(0, value)
 
574
        elif suffix == u"m":
 
575
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
576
        elif suffix == u"h":
 
577
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
578
        elif suffix == u"w":
 
579
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
580
        else:
833
581
            raise ValueError
834
 
        timevalue += delta
835
 
    return timevalue
 
582
    except (ValueError, IndexError):
 
583
        raise ValueError
 
584
    return delta
836
585
 
837
586
 
838
587
def server_state_changed(state):
839
588
    """Derived from the Avahi example code"""
840
589
    if state == avahi.SERVER_COLLISION:
841
 
        logger.error(u"Zeroconf server name collision")
 
590
        logger.error(u"Server name collision")
842
591
        service.remove()
843
592
    elif state == avahi.SERVER_RUNNING:
844
593
        service.add()
846
595
 
847
596
def entry_group_state_changed(state, error):
848
597
    """Derived from the Avahi example code"""
849
 
    logger.debug(u"Avahi state change: %i", state)
 
598
    logger.debug(u"state change: %i", state)
850
599
    
851
600
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
852
 
        logger.debug(u"Zeroconf service established.")
 
601
        logger.debug(u"Service established.")
853
602
    elif state == avahi.ENTRY_GROUP_COLLISION:
854
 
        logger.warning(u"Zeroconf service name collision.")
 
603
        logger.warning(u"Service name collision.")
855
604
        service.rename()
856
605
    elif state == avahi.ENTRY_GROUP_FAILURE:
857
 
        logger.critical(u"Avahi: Error in group state changed %s",
 
606
        logger.critical(u"Error in group state changed %s",
858
607
                        unicode(error))
859
 
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
 
608
        raise AvahiGroupError("State changed: %s", str(error))
860
609
 
861
610
def if_nametoindex(interface):
862
611
    """Call the C function if_nametoindex(), or equivalent"""
863
612
    global if_nametoindex
864
613
    try:
865
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
866
 
                          (ctypes.util.find_library("c"))
867
 
                          .if_nametoindex)
 
614
        if "ctypes.util" not in sys.modules:
 
615
            import ctypes.util
 
616
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
617
            (ctypes.util.find_library("c")).if_nametoindex
868
618
    except (OSError, AttributeError):
869
619
        if "struct" not in sys.modules:
870
620
            import struct
873
623
        def if_nametoindex(interface):
874
624
            "Get an interface index the hard way, i.e. using fcntl()"
875
625
            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))
 
626
            s = socket.socket()
 
627
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
628
                                struct.pack("16s16x", interface))
 
629
            s.close()
879
630
            interface_index = struct.unpack("I", ifreq[16:20])[0]
880
631
            return interface_index
881
632
    return if_nametoindex(interface)
905
656
 
906
657
 
907
658
def main():
908
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
659
    global main_loop_started
 
660
    main_loop_started = False
 
661
    
 
662
    parser = OptionParser(version = "%%prog %s" % version)
909
663
    parser.add_option("-i", "--interface", type="string",
910
664
                      metavar="IF", help="Bind to interface IF")
911
665
    parser.add_option("-a", "--address", type="string",
912
666
                      help="Address to listen for requests on")
913
667
    parser.add_option("-p", "--port", type="int",
914
668
                      help="Port number to receive requests on")
915
 
    parser.add_option("--check", action="store_true",
 
669
    parser.add_option("--check", action="store_true", default=False,
916
670
                      help="Run self-test")
917
671
    parser.add_option("--debug", action="store_true",
918
672
                      help="Debug mode; run in foreground and log to"
925
679
                      default="/etc/mandos", metavar="DIR",
926
680
                      help="Directory to search for configuration"
927
681
                      " 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]
 
682
    (options, args) = parser.parse_args()
933
683
    
934
684
    if options.check:
935
685
        import doctest
944
694
                        "priority":
945
695
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
946
696
                        "servicename": "Mandos",
947
 
                        "use_dbus": "True",
948
697
                        }
949
698
    
950
699
    # Parse config file for server-global settings
951
700
    server_config = ConfigParser.SafeConfigParser(server_defaults)
952
701
    del server_defaults
953
702
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
703
    server_section = "server"
954
704
    # 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")
 
705
    server_settings = dict(server_config.items(server_section))
 
706
    # Use getboolean on the boolean config option
 
707
    server_settings["debug"] = server_config.getboolean\
 
708
                               (server_section, "debug")
964
709
    del server_config
965
710
    
966
711
    # Override the settings from the config file with command line
967
712
    # options, if set.
968
713
    for option in ("interface", "address", "port", "debug",
969
 
                   "priority", "servicename", "configdir",
970
 
                   "use_dbus"):
 
714
                   "priority", "servicename", "configdir"):
971
715
        value = getattr(options, option)
972
716
        if value is not None:
973
717
            server_settings[option] = value
974
718
    del options
975
719
    # Now we have our good server settings in "server_settings"
976
720
    
977
 
    # For convenience
978
721
    debug = server_settings["debug"]
979
 
    use_dbus = server_settings["use_dbus"]
980
722
    
981
723
    if not debug:
982
724
        syslogger.setLevel(logging.WARNING)
983
725
        console.setLevel(logging.WARNING)
984
726
    
985
727
    if server_settings["servicename"] != "Mandos":
986
 
        syslogger.setFormatter(logging.Formatter
 
728
        syslogger.setFormatter(logging.Formatter\
987
729
                               ('Mandos (%s): %%(levelname)s:'
988
730
                                ' %%(message)s'
989
731
                                % server_settings["servicename"]))
992
734
    client_defaults = { "timeout": "1h",
993
735
                        "interval": "5m",
994
736
                        "checker": "fping -q -- %%(host)s",
995
 
                        "host": "",
996
737
                        }
997
738
    client_config = ConfigParser.SafeConfigParser(client_defaults)
998
739
    client_config.read(os.path.join(server_settings["configdir"],
999
740
                                    "clients.conf"))
1000
741
    
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
742
    global service
1048
743
    service = AvahiService(name = server_settings["servicename"],
1049
 
                           servicetype = "_mandos._tcp", )
 
744
                           type = "_mandos._tcp", );
1050
745
    if server_settings["interface"]:
1051
 
        service.interface = (if_nametoindex
1052
 
                             (server_settings["interface"]))
 
746
        service.interface = if_nametoindex(server_settings["interface"])
1053
747
    
1054
748
    global main_loop
1055
749
    global bus
1058
752
    DBusGMainLoop(set_as_default=True )
1059
753
    main_loop = gobject.MainLoop()
1060
754
    bus = dbus.SystemBus()
1061
 
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1062
 
                                           avahi.DBUS_PATH_SERVER),
1063
 
                            avahi.DBUS_INTERFACE_SERVER)
 
755
    server = dbus.Interface(
 
756
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
757
            avahi.DBUS_INTERFACE_SERVER )
1064
758
    # End of Avahi example code
1065
 
    if use_dbus:
1066
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
 
759
    
 
760
    clients = Set()
 
761
    def remove_from_clients(client):
 
762
        clients.remove(client)
 
763
        if not clients:
 
764
            logger.critical(u"No clients left, exiting")
 
765
            sys.exit()
1067
766
    
1068
767
    clients.update(Set(Client(name = section,
 
768
                              stop_hook = remove_from_clients,
1069
769
                              config
1070
 
                              = dict(client_config.items(section)),
1071
 
                              use_dbus = use_dbus)
 
770
                              = dict(client_config.items(section)))
1072
771
                       for section in client_config.sections()))
1073
772
    if not clients:
1074
 
        logger.warning(u"No clients defined")
 
773
        logger.critical(u"No clients defined")
 
774
        sys.exit(1)
1075
775
    
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
 
776
    if not debug:
1084
777
        logger.removeHandler(console)
1085
 
        # Close all input and output, do double fork, etc.
1086
778
        daemon()
1087
779
    
 
780
    pidfilename = "/var/run/mandos/mandos.pid"
 
781
    pid = os.getpid()
1088
782
    try:
1089
 
        pid = os.getpid()
 
783
        pidfile = open(pidfilename, "w")
1090
784
        pidfile.write(str(pid) + "\n")
1091
785
        pidfile.close()
1092
786
        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
 
787
    except IOError, err:
 
788
        logger.error(u"Could not write %s file with PID %d",
 
789
                     pidfilename, os.getpid())
1100
790
    
1101
791
    def cleanup():
1102
792
        "Cleanup function; run on exit"
1109
799
        
1110
800
        while clients:
1111
801
            client = clients.pop()
1112
 
            client.disable_hook = None
1113
 
            client.disable()
 
802
            client.stop_hook = None
 
803
            client.stop()
1114
804
    
1115
805
    atexit.register(cleanup)
1116
806
    
1119
809
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1120
810
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1121
811
    
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
812
    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
 
    
 
813
        client.start()
 
814
    
 
815
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
816
                                 server_settings["port"]),
 
817
                                tcp_handler,
 
818
                                settings=server_settings,
 
819
                                clients=clients)
1180
820
    # Find out what port we got
1181
821
    service.port = tcp_server.socket.getsockname()[1]
1182
822
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1196
836
        
1197
837
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1198
838
                             lambda *args, **kwargs:
1199
 
                             (tcp_server.handle_request
1200
 
                              (*args[2:], **kwargs) or True))
 
839
                             tcp_server.handle_request\
 
840
                             (*args[2:], **kwargs) or True)
1201
841
        
1202
842
        logger.debug(u"Starting main loop")
 
843
        main_loop_started = True
1203
844
        main_loop.run()
1204
845
    except AvahiError, error:
1205
 
        logger.critical(u"AvahiError: %s", error)
 
846
        logger.critical(u"AvahiError: %s" + unicode(error))
1206
847
        sys.exit(1)
1207
848
    except KeyboardInterrupt:
1208
849
        if debug:
1209
 
            print >> sys.stderr
1210
 
        logger.debug("Server received KeyboardInterrupt")
1211
 
    logger.debug("Server exiting")
 
850
            print
1212
851
 
1213
852
if __name__ == '__main__':
1214
853
    main()