/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2009-02-14 18:07:05 UTC
  • Revision ID: teddy@fukt.bsnet.se-20090214180705-vu6b7j4i2v2hibgg
Use "getconf" to get correct LFS compile and link flags.

* Makefile (GPGME_CFLAGS): Added output of "getconf LFS_CFLAGS".
  (GPGME_LIBS): Added output of "getconf LFS_LIBS" and
                "getconf LFS_LDFLAGS".
* plugins.d/mandos-client.c: Only define "_LARGEFILE_SOURCE" and
                             "_FILE_OFFSET_BITS" if they are not
                             already defined.

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Lines of Context:
mandos
11
11
# and some lines in "main".
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# 
13
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# Everything else is
14
 
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
 
14
# Copyright © 2008,2009 Teddy Hogeborn
 
15
# Copyright © 2008,2009 Björn Påhlsson
15
16
# 
16
17
# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
24
25
#     GNU General Public License for more details.
25
26
# 
26
27
# You should have received a copy of the GNU General Public License
27
 
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
28
# along with this program.  If not, see
 
29
# <http://www.gnu.org/licenses/>.
28
30
# 
29
31
# Contact the authors at <mandos@fukt.bsnet.se>.
30
32
# 
31
33
 
32
 
from __future__ import division
 
34
from __future__ import division, with_statement, absolute_import
33
35
 
34
36
import SocketServer
35
37
import socket
36
 
import select
37
 
from optparse import OptionParser
 
38
import optparse
38
39
import datetime
39
40
import errno
40
41
import gnutls.crypto
54
55
import stat
55
56
import logging
56
57
import logging.handlers
 
58
import pwd
 
59
from contextlib import closing
57
60
 
58
61
import dbus
 
62
import dbus.service
59
63
import gobject
60
64
import avahi
61
65
from dbus.mainloop.glib import DBusGMainLoop
62
66
import ctypes
 
67
import ctypes.util
63
68
 
64
 
version = "1.0"
 
69
version = "1.0.6"
65
70
 
66
71
logger = logging.Logger('mandos')
67
 
syslogger = logging.handlers.SysLogHandler\
68
 
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
69
 
             address = "/dev/log")
70
 
syslogger.setFormatter(logging.Formatter\
71
 
                        ('Mandos: %(levelname)s: %(message)s'))
 
72
syslogger = (logging.handlers.SysLogHandler
 
73
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
74
              address = "/dev/log"))
 
75
syslogger.setFormatter(logging.Formatter
 
76
                       ('Mandos [%(process)d]: %(levelname)s:'
 
77
                        ' %(message)s'))
72
78
logger.addHandler(syslogger)
73
79
 
74
80
console = logging.StreamHandler()
75
 
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
76
 
                                       ' %(message)s'))
 
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
 
82
                                       ' %(levelname)s: %(message)s'))
77
83
logger.addHandler(console)
78
84
 
79
85
class AvahiError(Exception):
80
 
    def __init__(self, value):
 
86
    def __init__(self, value, *args, **kwargs):
81
87
        self.value = value
82
 
    def __str__(self):
83
 
        return repr(self.value)
 
88
        super(AvahiError, self).__init__(value, *args, **kwargs)
 
89
    def __unicode__(self):
 
90
        return unicode(repr(self.value))
84
91
 
85
92
class AvahiServiceError(AvahiError):
86
93
    pass
106
113
                  a sensible number of times
107
114
    """
108
115
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
109
 
                 type = None, port = None, TXT = None, domain = "",
110
 
                 host = "", max_renames = 32768):
 
116
                 servicetype = None, port = None, TXT = None,
 
117
                 domain = "", host = "", max_renames = 32768,
 
118
                 protocol = avahi.PROTO_UNSPEC):
111
119
        self.interface = interface
112
120
        self.name = name
113
 
        self.type = type
 
121
        self.type = servicetype
114
122
        self.port = port
115
 
        if TXT is None:
116
 
            self.TXT = []
117
 
        else:
118
 
            self.TXT = TXT
 
123
        self.TXT = TXT if TXT is not None else []
119
124
        self.domain = domain
120
125
        self.host = host
121
126
        self.rename_count = 0
122
127
        self.max_renames = max_renames
 
128
        self.protocol = protocol
123
129
    def rename(self):
124
130
        """Derived from the Avahi example code"""
125
131
        if self.rename_count >= self.max_renames:
126
 
            logger.critical(u"No suitable service name found after %i"
127
 
                            u" retries, exiting.", rename_count)
128
 
            raise AvahiServiceError("Too many renames")
 
132
            logger.critical(u"No suitable Zeroconf service name found"
 
133
                            u" after %i retries, exiting.",
 
134
                            self.rename_count)
 
135
            raise AvahiServiceError(u"Too many renames")
129
136
        self.name = server.GetAlternativeServiceName(self.name)
130
 
        logger.info(u"Changing name to %r ...", str(self.name))
131
 
        syslogger.setFormatter(logging.Formatter\
 
137
        logger.info(u"Changing Zeroconf service name to %r ...",
 
138
                    str(self.name))
 
139
        syslogger.setFormatter(logging.Formatter
132
140
                               ('Mandos (%s): %%(levelname)s:'
133
 
                               ' %%(message)s' % self.name))
 
141
                                ' %%(message)s' % self.name))
134
142
        self.remove()
135
143
        self.add()
136
144
        self.rename_count += 1
142
150
        """Derived from the Avahi example code"""
143
151
        global group
144
152
        if group is None:
145
 
            group = dbus.Interface\
146
 
                    (bus.get_object(avahi.DBUS_NAME,
 
153
            group = dbus.Interface(bus.get_object
 
154
                                   (avahi.DBUS_NAME,
147
155
                                    server.EntryGroupNew()),
148
 
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
156
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
149
157
            group.connect_to_signal('StateChanged',
150
158
                                    entry_group_state_changed)
151
 
        logger.debug(u"Adding service '%s' of type '%s' ...",
 
159
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
152
160
                     service.name, service.type)
153
161
        group.AddService(
154
162
                self.interface,         # interface
155
 
                avahi.PROTO_INET6,      # protocol
 
163
                self.protocol,          # protocol
156
164
                dbus.UInt32(0),         # flags
157
165
                self.name, self.type,
158
166
                self.domain, self.host,
165
173
# End of Avahi example code
166
174
 
167
175
 
168
 
class Client(object):
 
176
def _datetime_to_dbus(dt, variant_level=0):
 
177
    """Convert a UTC datetime.datetime() to a D-Bus type."""
 
178
    return dbus.String(dt.isoformat(), variant_level=variant_level)
 
179
 
 
180
 
 
181
class Client(dbus.service.Object):
169
182
    """A representation of a client host served by this server.
170
183
    Attributes:
171
 
    name:      string; from the config file, used in log messages
 
184
    name:       string; from the config file, used in log messages and
 
185
                        D-Bus identifiers
172
186
    fingerprint: string (40 or 32 hexadecimal digits); used to
173
187
                 uniquely identify the client
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.
 
188
    secret:     bytestring; sent verbatim (over TLS) to client
 
189
    host:       string; available for use by the checker command
 
190
    created:    datetime.datetime(); (UTC) object creation
 
191
    last_enabled: datetime.datetime(); (UTC)
 
192
    enabled:    bool()
 
193
    last_checked_ok: datetime.datetime(); (UTC) or None
 
194
    timeout:    datetime.timedelta(); How long from last_checked_ok
 
195
                                      until this client is invalid
 
196
    interval:   datetime.timedelta(); How often to start a new checker
 
197
    disable_hook:  If set, called by disable() as disable_hook(self)
 
198
    checker:    subprocess.Popen(); a running checker process used
 
199
                                    to see if the client lives.
 
200
                                    'None' if no process is running.
185
201
    checker_initiator_tag: a gobject event source tag, or None
186
 
    stop_initiator_tag:    - '' -
 
202
    disable_initiator_tag:    - '' -
187
203
    checker_callback_tag:  - '' -
188
204
    checker_command: string; External command which is run to check if
189
205
                     client lives.  %() expansions are done at
190
206
                     runtime with vars(self) as dict, so that for
191
207
                     instance %(name)s can be used in the command.
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
    current_checker_command: string; current running checker_command
 
209
    use_dbus: bool(); Whether to provide D-Bus interface and signals
 
210
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
197
211
    """
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={}):
 
212
    def timeout_milliseconds(self):
 
213
        "Return the 'timeout' attribute in milliseconds"
 
214
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
 
215
                + (self.timeout.seconds * 1000)
 
216
                + (self.timeout.microseconds // 1000))
 
217
    
 
218
    def interval_milliseconds(self):
 
219
        "Return the 'interval' attribute in milliseconds"
 
220
        return ((self.interval.days * 24 * 60 * 60 * 1000)
 
221
                + (self.interval.seconds * 1000)
 
222
                + (self.interval.microseconds // 1000))
 
223
    
 
224
    def __init__(self, name = None, disable_hook=None, config=None,
 
225
                 use_dbus=True):
222
226
        """Note: the 'checker' key in 'config' sets the
223
227
        'checker_command' attribute and *not* the 'checker'
224
228
        attribute."""
225
229
        self.name = name
 
230
        if config is None:
 
231
            config = {}
226
232
        logger.debug(u"Creating client %r", self.name)
 
233
        self.use_dbus = False   # During __init__
227
234
        # Uppercase and remove spaces from fingerprint for later
228
235
        # comparison purposes with return value from the fingerprint()
229
236
        # function
230
 
        self.fingerprint = config["fingerprint"].upper()\
231
 
                           .replace(u" ", u"")
 
237
        self.fingerprint = (config["fingerprint"].upper()
 
238
                            .replace(u" ", u""))
232
239
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
233
240
        if "secret" in config:
234
241
            self.secret = config["secret"].decode(u"base64")
235
242
        elif "secfile" in config:
236
 
            sf = open(config["secfile"])
237
 
            self.secret = sf.read()
238
 
            sf.close()
 
243
            with closing(open(os.path.expanduser
 
244
                              (os.path.expandvars
 
245
                               (config["secfile"])))) as secfile:
 
246
                self.secret = secfile.read()
239
247
        else:
240
248
            raise TypeError(u"No secret or secfile for client %s"
241
249
                            % self.name)
242
250
        self.host = config.get("host", "")
243
 
        self.created = datetime.datetime.now()
 
251
        self.created = datetime.datetime.utcnow()
 
252
        self.enabled = False
 
253
        self.last_enabled = None
244
254
        self.last_checked_ok = None
245
255
        self.timeout = string_to_delta(config["timeout"])
246
256
        self.interval = string_to_delta(config["interval"])
247
 
        self.stop_hook = stop_hook
 
257
        self.disable_hook = disable_hook
248
258
        self.checker = None
249
259
        self.checker_initiator_tag = None
250
 
        self.stop_initiator_tag = None
 
260
        self.disable_initiator_tag = None
251
261
        self.checker_callback_tag = None
252
 
        self.check_command = config["checker"]
253
 
    def start(self):
 
262
        self.checker_command = config["checker"]
 
263
        self.current_checker_command = None
 
264
        self.last_connect = None
 
265
        # Only now, when this client is initialized, can it show up on
 
266
        # the D-Bus
 
267
        self.use_dbus = use_dbus
 
268
        if self.use_dbus:
 
269
            self.dbus_object_path = (dbus.ObjectPath
 
270
                                     ("/clients/"
 
271
                                      + self.name.replace(".", "_")))
 
272
            dbus.service.Object.__init__(self, bus,
 
273
                                         self.dbus_object_path)
 
274
    
 
275
    def enable(self):
254
276
        """Start this client's checker and timeout hooks"""
 
277
        self.last_enabled = datetime.datetime.utcnow()
255
278
        # Schedule a new checker to be started an 'interval' from now,
256
279
        # and every interval from then on.
257
 
        self.checker_initiator_tag = gobject.timeout_add\
258
 
                                     (self._interval_milliseconds,
259
 
                                      self.start_checker)
 
280
        self.checker_initiator_tag = (gobject.timeout_add
 
281
                                      (self.interval_milliseconds(),
 
282
                                       self.start_checker))
260
283
        # Also start a new checker *right now*.
261
284
        self.start_checker()
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:
 
285
        # Schedule a disable() when 'timeout' has passed
 
286
        self.disable_initiator_tag = (gobject.timeout_add
 
287
                                   (self.timeout_milliseconds(),
 
288
                                    self.disable))
 
289
        self.enabled = True
 
290
        if self.use_dbus:
 
291
            # Emit D-Bus signals
 
292
            self.PropertyChanged(dbus.String(u"enabled"),
 
293
                                 dbus.Boolean(True, variant_level=1))
 
294
            self.PropertyChanged(dbus.String(u"last_enabled"),
 
295
                                 (_datetime_to_dbus(self.last_enabled,
 
296
                                                    variant_level=1)))
 
297
    
 
298
    def disable(self):
 
299
        """Disable this client."""
 
300
        if not getattr(self, "enabled", False):
275
301
            return False
276
 
        if getattr(self, "stop_initiator_tag", False):
277
 
            gobject.source_remove(self.stop_initiator_tag)
278
 
            self.stop_initiator_tag = None
 
302
        logger.info(u"Disabling client %s", self.name)
 
303
        if getattr(self, "disable_initiator_tag", False):
 
304
            gobject.source_remove(self.disable_initiator_tag)
 
305
            self.disable_initiator_tag = None
279
306
        if getattr(self, "checker_initiator_tag", False):
280
307
            gobject.source_remove(self.checker_initiator_tag)
281
308
            self.checker_initiator_tag = None
282
309
        self.stop_checker()
283
 
        if self.stop_hook:
284
 
            self.stop_hook(self)
 
310
        if self.disable_hook:
 
311
            self.disable_hook(self)
 
312
        self.enabled = False
 
313
        if self.use_dbus:
 
314
            # Emit D-Bus signal
 
315
            self.PropertyChanged(dbus.String(u"enabled"),
 
316
                                 dbus.Boolean(False, variant_level=1))
285
317
        # Do not run this again if called by a gobject.timeout_add
286
318
        return False
 
319
    
287
320
    def __del__(self):
288
 
        self.stop_hook = None
289
 
        self.stop()
290
 
    def checker_callback(self, pid, condition):
 
321
        self.disable_hook = None
 
322
        self.disable()
 
323
    
 
324
    def checker_callback(self, pid, condition, command):
291
325
        """The checker has completed, so take appropriate actions."""
292
 
        now = datetime.datetime.now()
293
326
        self.checker_callback_tag = None
294
327
        self.checker = None
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):
 
328
        if self.use_dbus:
 
329
            # Emit D-Bus signal
 
330
            self.PropertyChanged(dbus.String(u"checker_running"),
 
331
                                 dbus.Boolean(False, variant_level=1))
 
332
        if os.WIFEXITED(condition):
 
333
            exitstatus = os.WEXITSTATUS(condition)
 
334
            if exitstatus == 0:
 
335
                logger.info(u"Checker for %(name)s succeeded",
 
336
                            vars(self))
 
337
                self.checked_ok()
 
338
            else:
 
339
                logger.info(u"Checker for %(name)s failed",
 
340
                            vars(self))
 
341
            if self.use_dbus:
 
342
                # Emit D-Bus signal
 
343
                self.CheckerCompleted(dbus.Int16(exitstatus),
 
344
                                      dbus.Int64(condition),
 
345
                                      dbus.String(command))
 
346
        else:
305
347
            logger.warning(u"Checker for %(name)s crashed?",
306
348
                           vars(self))
307
 
        else:
308
 
            logger.info(u"Checker for %(name)s failed",
309
 
                        vars(self))
 
349
            if self.use_dbus:
 
350
                # Emit D-Bus signal
 
351
                self.CheckerCompleted(dbus.Int16(-1),
 
352
                                      dbus.Int64(condition),
 
353
                                      dbus.String(command))
 
354
    
 
355
    def checked_ok(self):
 
356
        """Bump up the timeout for this client.
 
357
        This should only be called when the client has been seen,
 
358
        alive and well.
 
359
        """
 
360
        self.last_checked_ok = datetime.datetime.utcnow()
 
361
        gobject.source_remove(self.disable_initiator_tag)
 
362
        self.disable_initiator_tag = (gobject.timeout_add
 
363
                                      (self.timeout_milliseconds(),
 
364
                                       self.disable))
 
365
        if self.use_dbus:
 
366
            # Emit D-Bus signal
 
367
            self.PropertyChanged(
 
368
                dbus.String(u"last_checked_ok"),
 
369
                (_datetime_to_dbus(self.last_checked_ok,
 
370
                                   variant_level=1)))
 
371
    
310
372
    def start_checker(self):
311
373
        """Start a new checker subprocess if one is not running.
312
374
        If a checker already exists, leave it running and do
319
381
        # checkers alone, the checker would have to take more time
320
382
        # than 'timeout' for the client to be declared invalid, which
321
383
        # is as it should be.
 
384
        
 
385
        # If a checker exists, make sure it is not a zombie
 
386
        if self.checker is not None:
 
387
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
388
            if pid:
 
389
                logger.warning("Checker was a zombie")
 
390
                gobject.source_remove(self.checker_callback_tag)
 
391
                self.checker_callback(pid, status,
 
392
                                      self.current_checker_command)
 
393
        # Start a new checker if needed
322
394
        if self.checker is None:
323
395
            try:
324
 
                # In case check_command has exactly one % operator
325
 
                command = self.check_command % self.host
 
396
                # In case checker_command has exactly one % operator
 
397
                command = self.checker_command % self.host
326
398
            except TypeError:
327
399
                # Escape attributes for the shell
328
400
                escaped_attrs = dict((key, re.escape(str(val)))
329
401
                                     for key, val in
330
402
                                     vars(self).iteritems())
331
403
                try:
332
 
                    command = self.check_command % escaped_attrs
 
404
                    command = self.checker_command % escaped_attrs
333
405
                except TypeError, error:
334
406
                    logger.error(u'Could not format string "%s":'
335
 
                                 u' %s', self.check_command, error)
 
407
                                 u' %s', self.checker_command, error)
336
408
                    return True # Try again later
 
409
                self.current_checker_command = command
337
410
            try:
338
411
                logger.info(u"Starting checker %r for %s",
339
412
                            command, self.name)
344
417
                self.checker = subprocess.Popen(command,
345
418
                                                close_fds=True,
346
419
                                                shell=True, cwd="/")
347
 
                self.checker_callback_tag = gobject.child_watch_add\
348
 
                                            (self.checker.pid,
349
 
                                             self.checker_callback)
 
420
                if self.use_dbus:
 
421
                    # Emit D-Bus signal
 
422
                    self.CheckerStarted(command)
 
423
                    self.PropertyChanged(
 
424
                        dbus.String("checker_running"),
 
425
                        dbus.Boolean(True, variant_level=1))
 
426
                self.checker_callback_tag = (gobject.child_watch_add
 
427
                                             (self.checker.pid,
 
428
                                              self.checker_callback,
 
429
                                              data=command))
 
430
                # The checker may have completed before the gobject
 
431
                # watch was added.  Check for this.
 
432
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
433
                if pid:
 
434
                    gobject.source_remove(self.checker_callback_tag)
 
435
                    self.checker_callback(pid, status, command)
350
436
            except OSError, error:
351
437
                logger.error(u"Failed to start subprocess: %s",
352
438
                             error)
353
439
        # Re-run this periodically if run by gobject.timeout_add
354
440
        return True
 
441
    
355
442
    def stop_checker(self):
356
443
        """Force the checker process, if any, to stop."""
357
444
        if self.checker_callback_tag:
369
456
            if error.errno != errno.ESRCH: # No such process
370
457
                raise
371
458
        self.checker = None
 
459
        if self.use_dbus:
 
460
            self.PropertyChanged(dbus.String(u"checker_running"),
 
461
                                 dbus.Boolean(False, variant_level=1))
 
462
    
372
463
    def still_valid(self):
373
464
        """Has the timeout not yet passed for this client?"""
374
 
        now = datetime.datetime.now()
 
465
        if not getattr(self, "enabled", False):
 
466
            return False
 
467
        now = datetime.datetime.utcnow()
375
468
        if self.last_checked_ok is None:
376
469
            return now < (self.created + self.timeout)
377
470
        else:
378
471
            return now < (self.last_checked_ok + self.timeout)
 
472
    
 
473
    ## D-Bus methods & signals
 
474
    _interface = u"se.bsnet.fukt.Mandos.Client"
 
475
    
 
476
    # CheckedOK - method
 
477
    CheckedOK = dbus.service.method(_interface)(checked_ok)
 
478
    CheckedOK.__name__ = "CheckedOK"
 
479
    
 
480
    # CheckerCompleted - signal
 
481
    @dbus.service.signal(_interface, signature="nxs")
 
482
    def CheckerCompleted(self, exitcode, waitstatus, command):
 
483
        "D-Bus signal"
 
484
        pass
 
485
    
 
486
    # CheckerStarted - signal
 
487
    @dbus.service.signal(_interface, signature="s")
 
488
    def CheckerStarted(self, command):
 
489
        "D-Bus signal"
 
490
        pass
 
491
    
 
492
    # GetAllProperties - method
 
493
    @dbus.service.method(_interface, out_signature="a{sv}")
 
494
    def GetAllProperties(self):
 
495
        "D-Bus method"
 
496
        return dbus.Dictionary({
 
497
                dbus.String("name"):
 
498
                    dbus.String(self.name, variant_level=1),
 
499
                dbus.String("fingerprint"):
 
500
                    dbus.String(self.fingerprint, variant_level=1),
 
501
                dbus.String("host"):
 
502
                    dbus.String(self.host, variant_level=1),
 
503
                dbus.String("created"):
 
504
                    _datetime_to_dbus(self.created, variant_level=1),
 
505
                dbus.String("last_enabled"):
 
506
                    (_datetime_to_dbus(self.last_enabled,
 
507
                                       variant_level=1)
 
508
                     if self.last_enabled is not None
 
509
                     else dbus.Boolean(False, variant_level=1)),
 
510
                dbus.String("enabled"):
 
511
                    dbus.Boolean(self.enabled, variant_level=1),
 
512
                dbus.String("last_checked_ok"):
 
513
                    (_datetime_to_dbus(self.last_checked_ok,
 
514
                                       variant_level=1)
 
515
                     if self.last_checked_ok is not None
 
516
                     else dbus.Boolean (False, variant_level=1)),
 
517
                dbus.String("timeout"):
 
518
                    dbus.UInt64(self.timeout_milliseconds(),
 
519
                                variant_level=1),
 
520
                dbus.String("interval"):
 
521
                    dbus.UInt64(self.interval_milliseconds(),
 
522
                                variant_level=1),
 
523
                dbus.String("checker"):
 
524
                    dbus.String(self.checker_command,
 
525
                                variant_level=1),
 
526
                dbus.String("checker_running"):
 
527
                    dbus.Boolean(self.checker is not None,
 
528
                                 variant_level=1),
 
529
                dbus.String("object_path"):
 
530
                    dbus.ObjectPath(self.dbus_object_path,
 
531
                                    variant_level=1)
 
532
                }, signature="sv")
 
533
    
 
534
    # IsStillValid - method
 
535
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
 
536
                    (still_valid))
 
537
    IsStillValid.__name__ = "IsStillValid"
 
538
    
 
539
    # PropertyChanged - signal
 
540
    @dbus.service.signal(_interface, signature="sv")
 
541
    def PropertyChanged(self, property, value):
 
542
        "D-Bus signal"
 
543
        pass
 
544
    
 
545
    # SetChecker - method
 
546
    @dbus.service.method(_interface, in_signature="s")
 
547
    def SetChecker(self, checker):
 
548
        "D-Bus setter method"
 
549
        self.checker_command = checker
 
550
        # Emit D-Bus signal
 
551
        self.PropertyChanged(dbus.String(u"checker"),
 
552
                             dbus.String(self.checker_command,
 
553
                                         variant_level=1))
 
554
    
 
555
    # SetHost - method
 
556
    @dbus.service.method(_interface, in_signature="s")
 
557
    def SetHost(self, host):
 
558
        "D-Bus setter method"
 
559
        self.host = host
 
560
        # Emit D-Bus signal
 
561
        self.PropertyChanged(dbus.String(u"host"),
 
562
                             dbus.String(self.host, variant_level=1))
 
563
    
 
564
    # SetInterval - method
 
565
    @dbus.service.method(_interface, in_signature="t")
 
566
    def SetInterval(self, milliseconds):
 
567
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
 
568
        # Emit D-Bus signal
 
569
        self.PropertyChanged(dbus.String(u"interval"),
 
570
                             (dbus.UInt64(self.interval_milliseconds(),
 
571
                                          variant_level=1)))
 
572
    
 
573
    # SetSecret - method
 
574
    @dbus.service.method(_interface, in_signature="ay",
 
575
                         byte_arrays=True)
 
576
    def SetSecret(self, secret):
 
577
        "D-Bus setter method"
 
578
        self.secret = str(secret)
 
579
    
 
580
    # SetTimeout - method
 
581
    @dbus.service.method(_interface, in_signature="t")
 
582
    def SetTimeout(self, milliseconds):
 
583
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
 
584
        # Emit D-Bus signal
 
585
        self.PropertyChanged(dbus.String(u"timeout"),
 
586
                             (dbus.UInt64(self.timeout_milliseconds(),
 
587
                                          variant_level=1)))
 
588
    
 
589
    # Enable - method
 
590
    Enable = dbus.service.method(_interface)(enable)
 
591
    Enable.__name__ = "Enable"
 
592
    
 
593
    # StartChecker - method
 
594
    @dbus.service.method(_interface)
 
595
    def StartChecker(self):
 
596
        "D-Bus method"
 
597
        self.start_checker()
 
598
    
 
599
    # Disable - method
 
600
    @dbus.service.method(_interface)
 
601
    def Disable(self):
 
602
        "D-Bus method"
 
603
        self.disable()
 
604
    
 
605
    # StopChecker - method
 
606
    StopChecker = dbus.service.method(_interface)(stop_checker)
 
607
    StopChecker.__name__ = "StopChecker"
 
608
    
 
609
    del _interface
379
610
 
380
611
 
381
612
def peer_certificate(session):
382
613
    "Return the peer's OpenPGP certificate as a bytestring"
383
614
    # If not an OpenPGP certificate...
384
 
    if gnutls.library.functions.gnutls_certificate_type_get\
385
 
            (session._c_object) \
386
 
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
615
    if (gnutls.library.functions
 
616
        .gnutls_certificate_type_get(session._c_object)
 
617
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
387
618
        # ...do the normal thing
388
619
        return session.peer_certificate
389
 
    list_size = ctypes.c_uint()
390
 
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
391
 
        (session._c_object, ctypes.byref(list_size))
 
620
    list_size = ctypes.c_uint(1)
 
621
    cert_list = (gnutls.library.functions
 
622
                 .gnutls_certificate_get_peers
 
623
                 (session._c_object, ctypes.byref(list_size)))
 
624
    if not bool(cert_list) and list_size.value != 0:
 
625
        raise gnutls.errors.GNUTLSError("error getting peer"
 
626
                                        " certificate")
392
627
    if list_size.value == 0:
393
628
        return None
394
629
    cert = cert_list[0]
398
633
def fingerprint(openpgp):
399
634
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
400
635
    # New GnuTLS "datum" with the OpenPGP public key
401
 
    datum = gnutls.library.types.gnutls_datum_t\
402
 
        (ctypes.cast(ctypes.c_char_p(openpgp),
403
 
                     ctypes.POINTER(ctypes.c_ubyte)),
404
 
         ctypes.c_uint(len(openpgp)))
 
636
    datum = (gnutls.library.types
 
637
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
638
                                         ctypes.POINTER
 
639
                                         (ctypes.c_ubyte)),
 
640
                             ctypes.c_uint(len(openpgp))))
405
641
    # New empty GnuTLS certificate
406
642
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
407
 
    gnutls.library.functions.gnutls_openpgp_crt_init\
408
 
        (ctypes.byref(crt))
 
643
    (gnutls.library.functions
 
644
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
409
645
    # Import the OpenPGP public key into the certificate
410
 
    gnutls.library.functions.gnutls_openpgp_crt_import\
411
 
                    (crt, ctypes.byref(datum),
412
 
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
646
    (gnutls.library.functions
 
647
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
648
                                gnutls.library.constants
 
649
                                .GNUTLS_OPENPGP_FMT_RAW))
413
650
    # Verify the self signature in the key
414
 
    crtverify = ctypes.c_uint();
415
 
    gnutls.library.functions.gnutls_openpgp_crt_verify_self\
416
 
        (crt, ctypes.c_uint(0), ctypes.byref(crtverify))
 
651
    crtverify = ctypes.c_uint()
 
652
    (gnutls.library.functions
 
653
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
417
654
    if crtverify.value != 0:
418
655
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
419
656
        raise gnutls.errors.CertificateSecurityError("Verify failed")
420
657
    # New buffer for the fingerprint
421
 
    buffer = ctypes.create_string_buffer(20)
422
 
    buffer_length = ctypes.c_size_t()
 
658
    buf = ctypes.create_string_buffer(20)
 
659
    buf_len = ctypes.c_size_t()
423
660
    # Get the fingerprint from the certificate into the buffer
424
 
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
425
 
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
661
    (gnutls.library.functions
 
662
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
663
                                         ctypes.byref(buf_len)))
426
664
    # Deinit the certificate
427
665
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
428
666
    # Convert the buffer to a Python bytestring
429
 
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
667
    fpr = ctypes.string_at(buf, buf_len.value)
430
668
    # Convert the bytestring to hexadecimal notation
431
669
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
432
670
    return hex_fpr
433
671
 
434
672
 
435
 
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
673
class TCP_handler(SocketServer.BaseRequestHandler, object):
436
674
    """A TCP request handler class.
437
675
    Instantiated by IPv6_TCPServer for each request to handle it.
438
676
    Note: This will run in its own forked process."""
439
677
    
440
678
    def handle(self):
441
679
        logger.info(u"TCP connection from: %s",
442
 
                     unicode(self.client_address))
443
 
        session = gnutls.connection.ClientSession\
444
 
                  (self.request, gnutls.connection.X509Credentials())
 
680
                    unicode(self.client_address))
 
681
        session = (gnutls.connection
 
682
                   .ClientSession(self.request,
 
683
                                  gnutls.connection
 
684
                                  .X509Credentials()))
445
685
        
446
686
        line = self.request.makefile().readline()
447
687
        logger.debug(u"Protocol version: %r", line)
458
698
        # using OpenPGP certificates.
459
699
        
460
700
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
461
 
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
462
 
        #                "+DHE-DSS"))
463
 
        priority = "NORMAL"             # Fallback default, since this
464
 
                                        # MUST be set.
465
 
        if self.server.settings["priority"]:
466
 
            priority = self.server.settings["priority"]
467
 
        gnutls.library.functions.gnutls_priority_set_direct\
468
 
            (session._c_object, priority, None);
 
701
        #                     "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
702
        #                     "+DHE-DSS"))
 
703
        # Use a fallback default, since this MUST be set.
 
704
        priority = self.server.settings.get("priority", "NORMAL")
 
705
        (gnutls.library.functions
 
706
         .gnutls_priority_set_direct(session._c_object,
 
707
                                     priority, None))
469
708
        
470
709
        try:
471
710
            session.handshake()
474
713
            # Do not run session.bye() here: the session is not
475
714
            # established.  Just abandon the request.
476
715
            return
 
716
        logger.debug(u"Handshake succeeded")
477
717
        try:
478
718
            fpr = fingerprint(peer_certificate(session))
479
719
        except (TypeError, gnutls.errors.GNUTLSError), error:
481
721
            session.bye()
482
722
            return
483
723
        logger.debug(u"Fingerprint: %s", fpr)
484
 
        client = None
 
724
        
485
725
        for c in self.server.clients:
486
726
            if c.fingerprint == fpr:
487
727
                client = c
488
728
                break
489
 
        if not client:
 
729
        else:
490
730
            logger.warning(u"Client not found for fingerprint: %s",
491
731
                           fpr)
492
732
            session.bye()
499
739
                           vars(client))
500
740
            session.bye()
501
741
            return
 
742
        ## This won't work here, since we're in a fork.
 
743
        # client.checked_ok()
502
744
        sent_size = 0
503
745
        while sent_size < len(client.secret):
504
746
            sent = session.send(client.secret[sent_size:])
509
751
        session.bye()
510
752
 
511
753
 
512
 
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
513
 
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
 
754
class IPv6_TCPServer(SocketServer.ForkingMixIn,
 
755
                     SocketServer.TCPServer, object):
 
756
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
514
757
    Attributes:
515
758
        settings:       Server settings
516
759
        clients:        Set() of Client objects
 
760
        enabled:        Boolean; whether this server is activated yet
517
761
    """
518
762
    address_family = socket.AF_INET6
519
763
    def __init__(self, *args, **kwargs):
523
767
        if "clients" in kwargs:
524
768
            self.clients = kwargs["clients"]
525
769
            del kwargs["clients"]
526
 
        return super(type(self), self).__init__(*args, **kwargs)
 
770
        if "use_ipv6" in kwargs:
 
771
            if not kwargs["use_ipv6"]:
 
772
                self.address_family = socket.AF_INET
 
773
            del kwargs["use_ipv6"]
 
774
        self.enabled = False
 
775
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
527
776
    def server_bind(self):
528
777
        """This overrides the normal server_bind() function
529
778
        to bind to an interface if one was specified, and also NOT to
541
790
                                 u" bind to interface %s",
542
791
                                 self.settings["interface"])
543
792
                else:
544
 
                    raise error
 
793
                    raise
545
794
        # Only bind(2) the socket if we really need to.
546
795
        if self.server_address[0] or self.server_address[1]:
547
796
            if not self.server_address[0]:
548
 
                in6addr_any = "::"
549
 
                self.server_address = (in6addr_any,
 
797
                if self.address_family == socket.AF_INET6:
 
798
                    any_address = "::" # in6addr_any
 
799
                else:
 
800
                    any_address = socket.INADDR_ANY
 
801
                self.server_address = (any_address,
550
802
                                       self.server_address[1])
551
803
            elif not self.server_address[1]:
552
804
                self.server_address = (self.server_address[0],
558
810
#                                            if_nametoindex
559
811
#                                            (self.settings
560
812
#                                             ["interface"]))
561
 
            return super(type(self), self).server_bind()
 
813
            return super(IPv6_TCPServer, self).server_bind()
 
814
    def server_activate(self):
 
815
        if self.enabled:
 
816
            return super(IPv6_TCPServer, self).server_activate()
 
817
    def enable(self):
 
818
        self.enabled = True
562
819
 
563
820
 
564
821
def string_to_delta(interval):
565
822
    """Parse a string and return a datetime.timedelta
566
 
 
 
823
    
567
824
    >>> string_to_delta('7d')
568
825
    datetime.timedelta(7)
569
826
    >>> string_to_delta('60s')
580
837
    timevalue = datetime.timedelta(0)
581
838
    for s in interval.split():
582
839
        try:
583
 
            suffix=unicode(s[-1])
584
 
            value=int(s[:-1])
 
840
            suffix = unicode(s[-1])
 
841
            value = int(s[:-1])
585
842
            if suffix == u"d":
586
843
                delta = datetime.timedelta(value)
587
844
            elif suffix == u"s":
603
860
def server_state_changed(state):
604
861
    """Derived from the Avahi example code"""
605
862
    if state == avahi.SERVER_COLLISION:
606
 
        logger.error(u"Server name collision")
 
863
        logger.error(u"Zeroconf server name collision")
607
864
        service.remove()
608
865
    elif state == avahi.SERVER_RUNNING:
609
866
        service.add()
611
868
 
612
869
def entry_group_state_changed(state, error):
613
870
    """Derived from the Avahi example code"""
614
 
    logger.debug(u"state change: %i", state)
 
871
    logger.debug(u"Avahi state change: %i", state)
615
872
    
616
873
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
617
 
        logger.debug(u"Service established.")
 
874
        logger.debug(u"Zeroconf service established.")
618
875
    elif state == avahi.ENTRY_GROUP_COLLISION:
619
 
        logger.warning(u"Service name collision.")
 
876
        logger.warning(u"Zeroconf service name collision.")
620
877
        service.rename()
621
878
    elif state == avahi.ENTRY_GROUP_FAILURE:
622
 
        logger.critical(u"Error in group state changed %s",
 
879
        logger.critical(u"Avahi: Error in group state changed %s",
623
880
                        unicode(error))
624
 
        raise AvahiGroupError("State changed: %s", str(error))
 
881
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
625
882
 
626
883
def if_nametoindex(interface):
627
884
    """Call the C function if_nametoindex(), or equivalent"""
628
885
    global if_nametoindex
629
886
    try:
630
 
        if "ctypes.util" not in sys.modules:
631
 
            import ctypes.util
632
 
        if_nametoindex = ctypes.cdll.LoadLibrary\
633
 
            (ctypes.util.find_library("c")).if_nametoindex
 
887
        if_nametoindex = (ctypes.cdll.LoadLibrary
 
888
                          (ctypes.util.find_library("c"))
 
889
                          .if_nametoindex)
634
890
    except (OSError, AttributeError):
635
891
        if "struct" not in sys.modules:
636
892
            import struct
639
895
        def if_nametoindex(interface):
640
896
            "Get an interface index the hard way, i.e. using fcntl()"
641
897
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
642
 
            s = socket.socket()
643
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
644
 
                                struct.pack("16s16x", interface))
645
 
            s.close()
 
898
            with closing(socket.socket()) as s:
 
899
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
900
                                    struct.pack("16s16x", interface))
646
901
            interface_index = struct.unpack("I", ifreq[16:20])[0]
647
902
            return interface_index
648
903
    return if_nametoindex(interface)
672
927
 
673
928
 
674
929
def main():
675
 
    global main_loop_started
676
 
    main_loop_started = False
677
 
    
678
 
    parser = OptionParser(version = "%%prog %s" % version)
 
930
    parser = optparse.OptionParser(version = "%%prog %s" % version)
679
931
    parser.add_option("-i", "--interface", type="string",
680
932
                      metavar="IF", help="Bind to interface IF")
681
933
    parser.add_option("-a", "--address", type="string",
682
934
                      help="Address to listen for requests on")
683
935
    parser.add_option("-p", "--port", type="int",
684
936
                      help="Port number to receive requests on")
685
 
    parser.add_option("--check", action="store_true", default=False,
 
937
    parser.add_option("--check", action="store_true",
686
938
                      help="Run self-test")
687
939
    parser.add_option("--debug", action="store_true",
688
940
                      help="Debug mode; run in foreground and log to"
695
947
                      default="/etc/mandos", metavar="DIR",
696
948
                      help="Directory to search for configuration"
697
949
                      " files")
698
 
    (options, args) = parser.parse_args()
 
950
    parser.add_option("--no-dbus", action="store_false",
 
951
                      dest="use_dbus",
 
952
                      help="Do not provide D-Bus system bus"
 
953
                      " interface")
 
954
    parser.add_option("--no-ipv6", action="store_false",
 
955
                      dest="use_ipv6", help="Do not use IPv6")
 
956
    options = parser.parse_args()[0]
699
957
    
700
958
    if options.check:
701
959
        import doctest
710
968
                        "priority":
711
969
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
712
970
                        "servicename": "Mandos",
 
971
                        "use_dbus": "True",
 
972
                        "use_ipv6": "True",
713
973
                        }
714
974
    
715
975
    # Parse config file for server-global settings
718
978
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
719
979
    # Convert the SafeConfigParser object to a dict
720
980
    server_settings = server_config.defaults()
721
 
    # Use getboolean on the boolean config option
722
 
    server_settings["debug"] = server_config.getboolean\
723
 
                               ("DEFAULT", "debug")
 
981
    # Use the appropriate methods on the non-string config options
 
982
    server_settings["debug"] = server_config.getboolean("DEFAULT",
 
983
                                                        "debug")
 
984
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
 
985
                                                           "use_dbus")
 
986
    server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
 
987
                                                           "use_ipv6")
 
988
    if server_settings["port"]:
 
989
        server_settings["port"] = server_config.getint("DEFAULT",
 
990
                                                       "port")
724
991
    del server_config
725
992
    
726
993
    # Override the settings from the config file with command line
727
994
    # options, if set.
728
995
    for option in ("interface", "address", "port", "debug",
729
 
                   "priority", "servicename", "configdir"):
 
996
                   "priority", "servicename", "configdir",
 
997
                   "use_dbus", "use_ipv6"):
730
998
        value = getattr(options, option)
731
999
        if value is not None:
732
1000
            server_settings[option] = value
733
1001
    del options
734
1002
    # Now we have our good server settings in "server_settings"
735
1003
    
 
1004
    # For convenience
736
1005
    debug = server_settings["debug"]
 
1006
    use_dbus = server_settings["use_dbus"]
 
1007
    use_ipv6 = server_settings["use_ipv6"]
737
1008
    
738
1009
    if not debug:
739
1010
        syslogger.setLevel(logging.WARNING)
740
1011
        console.setLevel(logging.WARNING)
741
1012
    
742
1013
    if server_settings["servicename"] != "Mandos":
743
 
        syslogger.setFormatter(logging.Formatter\
 
1014
        syslogger.setFormatter(logging.Formatter
744
1015
                               ('Mandos (%s): %%(levelname)s:'
745
1016
                                ' %%(message)s'
746
1017
                                % server_settings["servicename"]))
748
1019
    # Parse config file with clients
749
1020
    client_defaults = { "timeout": "1h",
750
1021
                        "interval": "5m",
751
 
                        "checker": "fping -q -- %(host)s",
 
1022
                        "checker": "fping -q -- %%(host)s",
752
1023
                        "host": "",
753
1024
                        }
754
1025
    client_config = ConfigParser.SafeConfigParser(client_defaults)
755
1026
    client_config.read(os.path.join(server_settings["configdir"],
756
1027
                                    "clients.conf"))
757
1028
    
 
1029
    clients = Set()
 
1030
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
1031
                                 server_settings["port"]),
 
1032
                                TCP_handler,
 
1033
                                settings=server_settings,
 
1034
                                clients=clients, use_ipv6=use_ipv6)
 
1035
    pidfilename = "/var/run/mandos.pid"
 
1036
    try:
 
1037
        pidfile = open(pidfilename, "w")
 
1038
    except IOError:
 
1039
        logger.error("Could not open file %r", pidfilename)
 
1040
    
 
1041
    try:
 
1042
        uid = pwd.getpwnam("_mandos").pw_uid
 
1043
        gid = pwd.getpwnam("_mandos").pw_gid
 
1044
    except KeyError:
 
1045
        try:
 
1046
            uid = pwd.getpwnam("mandos").pw_uid
 
1047
            gid = pwd.getpwnam("mandos").pw_gid
 
1048
        except KeyError:
 
1049
            try:
 
1050
                uid = pwd.getpwnam("nobody").pw_uid
 
1051
                gid = pwd.getpwnam("nogroup").pw_gid
 
1052
            except KeyError:
 
1053
                uid = 65534
 
1054
                gid = 65534
 
1055
    try:
 
1056
        os.setgid(gid)
 
1057
        os.setuid(uid)
 
1058
    except OSError, error:
 
1059
        if error[0] != errno.EPERM:
 
1060
            raise error
 
1061
    
 
1062
    # Enable all possible GnuTLS debugging
 
1063
    if debug:
 
1064
        # "Use a log level over 10 to enable all debugging options."
 
1065
        # - GnuTLS manual
 
1066
        gnutls.library.functions.gnutls_global_set_log_level(11)
 
1067
        
 
1068
        @gnutls.library.types.gnutls_log_func
 
1069
        def debug_gnutls(level, string):
 
1070
            logger.debug("GnuTLS: %s", string[:-1])
 
1071
        
 
1072
        (gnutls.library.functions
 
1073
         .gnutls_global_set_log_function(debug_gnutls))
 
1074
    
758
1075
    global service
 
1076
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
759
1077
    service = AvahiService(name = server_settings["servicename"],
760
 
                           type = "_mandos._tcp", );
 
1078
                           servicetype = "_mandos._tcp",
 
1079
                           protocol = protocol)
761
1080
    if server_settings["interface"]:
762
 
        service.interface = if_nametoindex(server_settings["interface"])
 
1081
        service.interface = (if_nametoindex
 
1082
                             (server_settings["interface"]))
763
1083
    
764
1084
    global main_loop
765
1085
    global bus
768
1088
    DBusGMainLoop(set_as_default=True )
769
1089
    main_loop = gobject.MainLoop()
770
1090
    bus = dbus.SystemBus()
771
 
    server = dbus.Interface(
772
 
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
773
 
            avahi.DBUS_INTERFACE_SERVER )
 
1091
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
1092
                                           avahi.DBUS_PATH_SERVER),
 
1093
                            avahi.DBUS_INTERFACE_SERVER)
774
1094
    # End of Avahi example code
775
 
    
776
 
    clients = Set()
777
 
    def remove_from_clients(client):
778
 
        clients.remove(client)
779
 
        if not clients:
780
 
            logger.critical(u"No clients left, exiting")
781
 
            sys.exit()
 
1095
    if use_dbus:
 
1096
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
782
1097
    
783
1098
    clients.update(Set(Client(name = section,
784
 
                              stop_hook = remove_from_clients,
785
1099
                              config
786
 
                              = dict(client_config.items(section)))
 
1100
                              = dict(client_config.items(section)),
 
1101
                              use_dbus = use_dbus)
787
1102
                       for section in client_config.sections()))
788
1103
    if not clients:
789
 
        logger.critical(u"No clients defined")
790
 
        sys.exit(1)
 
1104
        logger.warning(u"No clients defined")
791
1105
    
792
1106
    if debug:
793
1107
        # Redirect stdin so all checkers get /dev/null
801
1115
        # Close all input and output, do double fork, etc.
802
1116
        daemon()
803
1117
    
804
 
    pidfilename = "/var/run/mandos/mandos.pid"
805
 
    pid = os.getpid()
806
1118
    try:
807
 
        pidfile = open(pidfilename, "w")
 
1119
        pid = os.getpid()
808
1120
        pidfile.write(str(pid) + "\n")
809
1121
        pidfile.close()
810
1122
        del pidfile
811
 
    except IOError, err:
812
 
        logger.error(u"Could not write %s file with PID %d",
813
 
                     pidfilename, os.getpid())
 
1123
    except IOError:
 
1124
        logger.error(u"Could not write to file %r with PID %d",
 
1125
                     pidfilename, pid)
 
1126
    except NameError:
 
1127
        # "pidfile" was never created
 
1128
        pass
 
1129
    del pidfilename
814
1130
    
815
1131
    def cleanup():
816
1132
        "Cleanup function; run on exit"
823
1139
        
824
1140
        while clients:
825
1141
            client = clients.pop()
826
 
            client.stop_hook = None
827
 
            client.stop()
 
1142
            client.disable_hook = None
 
1143
            client.disable()
828
1144
    
829
1145
    atexit.register(cleanup)
830
1146
    
833
1149
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
834
1150
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
835
1151
    
 
1152
    if use_dbus:
 
1153
        class MandosServer(dbus.service.Object):
 
1154
            """A D-Bus proxy object"""
 
1155
            def __init__(self):
 
1156
                dbus.service.Object.__init__(self, bus, "/")
 
1157
            _interface = u"se.bsnet.fukt.Mandos"
 
1158
            
 
1159
            @dbus.service.signal(_interface, signature="oa{sv}")
 
1160
            def ClientAdded(self, objpath, properties):
 
1161
                "D-Bus signal"
 
1162
                pass
 
1163
            
 
1164
            @dbus.service.signal(_interface, signature="os")
 
1165
            def ClientRemoved(self, objpath, name):
 
1166
                "D-Bus signal"
 
1167
                pass
 
1168
            
 
1169
            @dbus.service.method(_interface, out_signature="ao")
 
1170
            def GetAllClients(self):
 
1171
                "D-Bus method"
 
1172
                return dbus.Array(c.dbus_object_path for c in clients)
 
1173
            
 
1174
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
 
1175
            def GetAllClientsWithProperties(self):
 
1176
                "D-Bus method"
 
1177
                return dbus.Dictionary(
 
1178
                    ((c.dbus_object_path, c.GetAllProperties())
 
1179
                     for c in clients),
 
1180
                    signature="oa{sv}")
 
1181
            
 
1182
            @dbus.service.method(_interface, in_signature="o")
 
1183
            def RemoveClient(self, object_path):
 
1184
                "D-Bus method"
 
1185
                for c in clients:
 
1186
                    if c.dbus_object_path == object_path:
 
1187
                        clients.remove(c)
 
1188
                        # Don't signal anything except ClientRemoved
 
1189
                        c.use_dbus = False
 
1190
                        c.disable()
 
1191
                        # Emit D-Bus signal
 
1192
                        self.ClientRemoved(object_path, c.name)
 
1193
                        return
 
1194
                raise KeyError
 
1195
            
 
1196
            del _interface
 
1197
        
 
1198
        mandos_server = MandosServer()
 
1199
    
836
1200
    for client in clients:
837
 
        client.start()
838
 
    
839
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
840
 
                                 server_settings["port"]),
841
 
                                tcp_handler,
842
 
                                settings=server_settings,
843
 
                                clients=clients)
 
1201
        if use_dbus:
 
1202
            # Emit D-Bus signal
 
1203
            mandos_server.ClientAdded(client.dbus_object_path,
 
1204
                                      client.GetAllProperties())
 
1205
        client.enable()
 
1206
    
 
1207
    tcp_server.enable()
 
1208
    tcp_server.server_activate()
 
1209
    
844
1210
    # Find out what port we got
845
1211
    service.port = tcp_server.socket.getsockname()[1]
846
 
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
847
 
                u" scope_id %d" % tcp_server.socket.getsockname())
 
1212
    if use_ipv6:
 
1213
        logger.info(u"Now listening on address %r, port %d,"
 
1214
                    " flowinfo %d, scope_id %d"
 
1215
                    % tcp_server.socket.getsockname())
 
1216
    else:                       # IPv4
 
1217
        logger.info(u"Now listening on address %r, port %d"
 
1218
                    % tcp_server.socket.getsockname())
848
1219
    
849
1220
    #service.interface = tcp_server.socket.getsockname()[3]
850
1221
    
860
1231
        
861
1232
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
862
1233
                             lambda *args, **kwargs:
863
 
                             tcp_server.handle_request\
864
 
                             (*args[2:], **kwargs) or True)
 
1234
                             (tcp_server.handle_request
 
1235
                              (*args[2:], **kwargs) or True))
865
1236
        
866
1237
        logger.debug(u"Starting main loop")
867
 
        main_loop_started = True
868
1238
        main_loop.run()
869
1239
    except AvahiError, error:
870
 
        logger.critical(u"AvahiError: %s" + unicode(error))
 
1240
        logger.critical(u"AvahiError: %s", error)
871
1241
        sys.exit(1)
872
1242
    except KeyboardInterrupt:
873
1243
        if debug:
874
 
            print
 
1244
            print >> sys.stderr
 
1245
        logger.debug("Server received KeyboardInterrupt")
 
1246
    logger.debug("Server exiting")
875
1247
 
876
1248
if __name__ == '__main__':
877
1249
    main()