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Lines of Context:
mandos
11
11
# and some lines in "main".
12
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# 
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 = "1.0.8"
 
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,
118
 
                 protocol = avahi.PROTO_UNSPEC):
 
109
                 type = None, port = None, TXT = None, domain = "",
 
110
                 host = "", max_renames = 32768):
119
111
        self.interface = interface
120
112
        self.name = name
121
 
        self.type = servicetype
 
113
        self.type = type
122
114
        self.port = port
123
 
        self.TXT = TXT if TXT is not None else []
 
115
        if TXT is None:
 
116
            self.TXT = []
 
117
        else:
 
118
            self.TXT = TXT
124
119
        self.domain = domain
125
120
        self.host = host
126
121
        self.rename_count = 0
127
122
        self.max_renames = max_renames
128
 
        self.protocol = protocol
129
123
    def rename(self):
130
124
        """Derived from the Avahi example code"""
131
125
        if self.rename_count >= self.max_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")
 
126
            logger.critical(u"No suitable service name found after %i"
 
127
                            u" retries, exiting.", rename_count)
 
128
            raise AvahiServiceError("Too many renames")
136
129
        self.name = server.GetAlternativeServiceName(self.name)
137
 
        logger.info(u"Changing Zeroconf service name to %r ...",
138
 
                    str(self.name))
139
 
        syslogger.setFormatter(logging.Formatter
 
130
        logger.info(u"Changing name to %r ...", str(self.name))
 
131
        syslogger.setFormatter(logging.Formatter\
140
132
                               ('Mandos (%s): %%(levelname)s:'
141
 
                                ' %%(message)s' % self.name))
 
133
                               ' %%(message)s' % self.name))
142
134
        self.remove()
143
135
        self.add()
144
136
        self.rename_count += 1
150
142
        """Derived from the Avahi example code"""
151
143
        global group
152
144
        if group is None:
153
 
            group = dbus.Interface(bus.get_object
154
 
                                   (avahi.DBUS_NAME,
 
145
            group = dbus.Interface\
 
146
                    (bus.get_object(avahi.DBUS_NAME,
155
147
                                    server.EntryGroupNew()),
156
 
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
148
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
149
            group.connect_to_signal('StateChanged',
158
150
                                    entry_group_state_changed)
159
 
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
151
        logger.debug(u"Adding service '%s' of type '%s' ...",
160
152
                     service.name, service.type)
161
153
        group.AddService(
162
154
                self.interface,         # interface
163
 
                self.protocol,          # protocol
 
155
                avahi.PROTO_INET6,      # protocol
164
156
                dbus.UInt32(0),         # flags
165
157
                self.name, self.type,
166
158
                self.domain, self.host,
173
165
# End of Avahi example code
174
166
 
175
167
 
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):
 
168
class Client(object):
182
169
    """A representation of a client host served by this server.
183
170
    Attributes:
184
 
    name:       string; from the config file, used in log messages and
185
 
                        D-Bus identifiers
 
171
    name:      string; from the config file, used in log messages
186
172
    fingerprint: string (40 or 32 hexadecimal digits); used to
187
173
                 uniquely identify the client
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.
 
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.
201
185
    checker_initiator_tag: a gobject event source tag, or None
202
 
    disable_initiator_tag:    - '' -
 
186
    stop_initiator_tag:    - '' -
203
187
    checker_callback_tag:  - '' -
204
188
    checker_command: string; External command which is run to check if
205
189
                     client lives.  %() expansions are done at
206
190
                     runtime with vars(self) as dict, so that for
207
191
                     instance %(name)s can be used in the command.
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
 
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: - '' -
211
197
    """
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):
 
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={}):
226
222
        """Note: the 'checker' key in 'config' sets the
227
223
        'checker_command' attribute and *not* the 'checker'
228
224
        attribute."""
229
225
        self.name = name
230
 
        if config is None:
231
 
            config = {}
232
226
        logger.debug(u"Creating client %r", self.name)
233
 
        self.use_dbus = False   # During __init__
234
227
        # Uppercase and remove spaces from fingerprint for later
235
228
        # comparison purposes with return value from the fingerprint()
236
229
        # function
237
 
        self.fingerprint = (config["fingerprint"].upper()
238
 
                            .replace(u" ", u""))
 
230
        self.fingerprint = config["fingerprint"].upper()\
 
231
                           .replace(u" ", u"")
239
232
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
240
233
        if "secret" in config:
241
234
            self.secret = config["secret"].decode(u"base64")
242
235
        elif "secfile" in config:
243
 
            with closing(open(os.path.expanduser
244
 
                              (os.path.expandvars
245
 
                               (config["secfile"])))) as secfile:
246
 
                self.secret = secfile.read()
 
236
            sf = open(config["secfile"])
 
237
            self.secret = sf.read()
 
238
            sf.close()
247
239
        else:
248
240
            raise TypeError(u"No secret or secfile for client %s"
249
241
                            % self.name)
250
242
        self.host = config.get("host", "")
251
 
        self.created = datetime.datetime.utcnow()
252
 
        self.enabled = False
253
 
        self.last_enabled = None
 
243
        self.created = datetime.datetime.now()
254
244
        self.last_checked_ok = None
255
245
        self.timeout = string_to_delta(config["timeout"])
256
246
        self.interval = string_to_delta(config["interval"])
257
 
        self.disable_hook = disable_hook
 
247
        self.stop_hook = stop_hook
258
248
        self.checker = None
259
249
        self.checker_initiator_tag = None
260
 
        self.disable_initiator_tag = None
 
250
        self.stop_initiator_tag = None
261
251
        self.checker_callback_tag = None
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):
 
252
        self.check_command = config["checker"]
 
253
    def start(self):
276
254
        """Start this client's checker and timeout hooks"""
277
 
        self.last_enabled = datetime.datetime.utcnow()
278
255
        # Schedule a new checker to be started an 'interval' from now,
279
256
        # and every interval from then on.
280
 
        self.checker_initiator_tag = (gobject.timeout_add
281
 
                                      (self.interval_milliseconds(),
282
 
                                       self.start_checker))
 
257
        self.checker_initiator_tag = gobject.timeout_add\
 
258
                                     (self._interval_milliseconds,
 
259
                                      self.start_checker)
283
260
        # Also start a new checker *right now*.
284
261
        self.start_checker()
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):
 
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:
301
275
            return False
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
 
276
        if getattr(self, "stop_initiator_tag", False):
 
277
            gobject.source_remove(self.stop_initiator_tag)
 
278
            self.stop_initiator_tag = None
306
279
        if getattr(self, "checker_initiator_tag", False):
307
280
            gobject.source_remove(self.checker_initiator_tag)
308
281
            self.checker_initiator_tag = None
309
282
        self.stop_checker()
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))
 
283
        if self.stop_hook:
 
284
            self.stop_hook(self)
317
285
        # Do not run this again if called by a gobject.timeout_add
318
286
        return False
319
 
    
320
287
    def __del__(self):
321
 
        self.disable_hook = None
322
 
        self.disable()
323
 
    
324
 
    def checker_callback(self, pid, condition, command):
 
288
        self.stop_hook = None
 
289
        self.stop()
 
290
    def checker_callback(self, pid, condition):
325
291
        """The checker has completed, so take appropriate actions."""
 
292
        now = datetime.datetime.now()
326
293
        self.checker_callback_tag = None
327
294
        self.checker = None
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:
 
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):
347
305
            logger.warning(u"Checker for %(name)s crashed?",
348
306
                           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
 
    
 
307
        else:
 
308
            logger.info(u"Checker for %(name)s failed",
 
309
                        vars(self))
372
310
    def start_checker(self):
373
311
        """Start a new checker subprocess if one is not running.
374
312
        If a checker already exists, leave it running and do
381
319
        # checkers alone, the checker would have to take more time
382
320
        # than 'timeout' for the client to be declared invalid, which
383
321
        # 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
394
322
        if self.checker is None:
395
323
            try:
396
 
                # In case checker_command has exactly one % operator
397
 
                command = self.checker_command % self.host
 
324
                # In case check_command has exactly one % operator
 
325
                command = self.check_command % self.host
398
326
            except TypeError:
399
327
                # Escape attributes for the shell
400
328
                escaped_attrs = dict((key, re.escape(str(val)))
401
329
                                     for key, val in
402
330
                                     vars(self).iteritems())
403
331
                try:
404
 
                    command = self.checker_command % escaped_attrs
 
332
                    command = self.check_command % escaped_attrs
405
333
                except TypeError, error:
406
334
                    logger.error(u'Could not format string "%s":'
407
 
                                 u' %s', self.checker_command, error)
 
335
                                 u' %s', self.check_command, error)
408
336
                    return True # Try again later
409
 
                self.current_checker_command = command
410
337
            try:
411
338
                logger.info(u"Starting checker %r for %s",
412
339
                            command, self.name)
417
344
                self.checker = subprocess.Popen(command,
418
345
                                                close_fds=True,
419
346
                                                shell=True, cwd="/")
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)
 
347
                self.checker_callback_tag = gobject.child_watch_add\
 
348
                                            (self.checker.pid,
 
349
                                             self.checker_callback)
436
350
            except OSError, error:
437
351
                logger.error(u"Failed to start subprocess: %s",
438
352
                             error)
439
353
        # Re-run this periodically if run by gobject.timeout_add
440
354
        return True
441
 
    
442
355
    def stop_checker(self):
443
356
        """Force the checker process, if any, to stop."""
444
357
        if self.checker_callback_tag:
456
369
            if error.errno != errno.ESRCH: # No such process
457
370
                raise
458
371
        self.checker = None
459
 
        if self.use_dbus:
460
 
            self.PropertyChanged(dbus.String(u"checker_running"),
461
 
                                 dbus.Boolean(False, variant_level=1))
462
 
    
463
372
    def still_valid(self):
464
373
        """Has the timeout not yet passed for this client?"""
465
 
        if not getattr(self, "enabled", False):
466
 
            return False
467
 
        now = datetime.datetime.utcnow()
 
374
        now = datetime.datetime.now()
468
375
        if self.last_checked_ok is None:
469
376
            return now < (self.created + self.timeout)
470
377
        else:
471
378
            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
610
379
 
611
380
 
612
381
def peer_certificate(session):
613
382
    "Return the peer's OpenPGP certificate as a bytestring"
614
383
    # If not an OpenPGP certificate...
615
 
    if (gnutls.library.functions
616
 
        .gnutls_certificate_type_get(session._c_object)
617
 
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
384
    if gnutls.library.functions.gnutls_certificate_type_get\
 
385
            (session._c_object) \
 
386
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
618
387
        # ...do the normal thing
619
388
        return session.peer_certificate
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")
 
389
    list_size = ctypes.c_uint()
 
390
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
391
        (session._c_object, ctypes.byref(list_size))
627
392
    if list_size.value == 0:
628
393
        return None
629
394
    cert = cert_list[0]
633
398
def fingerprint(openpgp):
634
399
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
635
400
    # New GnuTLS "datum" with the OpenPGP public key
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))))
 
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)))
641
405
    # New empty GnuTLS certificate
642
406
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
643
 
    (gnutls.library.functions
644
 
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
407
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
408
        (ctypes.byref(crt))
645
409
    # Import the OpenPGP public key into the certificate
646
 
    (gnutls.library.functions
647
 
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
648
 
                                gnutls.library.constants
649
 
                                .GNUTLS_OPENPGP_FMT_RAW))
 
410
    gnutls.library.functions.gnutls_openpgp_crt_import\
 
411
                    (crt, ctypes.byref(datum),
 
412
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
650
413
    # Verify the self signature in the key
651
 
    crtverify = ctypes.c_uint()
652
 
    (gnutls.library.functions
653
 
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
654
 
    if crtverify.value != 0:
 
414
    crtverify = ctypes.c_uint();
 
415
    gnutls.library.functions.gnutls_openpgp_crt_verify_self\
 
416
        (crt, ctypes.c_uint(0), ctypes.byref(crtverify))
 
417
    if crtverify != 0:
655
418
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
656
419
        raise gnutls.errors.CertificateSecurityError("Verify failed")
657
420
    # New buffer for the fingerprint
658
 
    buf = ctypes.create_string_buffer(20)
659
 
    buf_len = ctypes.c_size_t()
 
421
    buffer = ctypes.create_string_buffer(20)
 
422
    buffer_length = ctypes.c_size_t()
660
423
    # Get the fingerprint from the certificate into the buffer
661
 
    (gnutls.library.functions
662
 
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
663
 
                                         ctypes.byref(buf_len)))
 
424
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
425
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
664
426
    # Deinit the certificate
665
427
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
666
428
    # Convert the buffer to a Python bytestring
667
 
    fpr = ctypes.string_at(buf, buf_len.value)
 
429
    fpr = ctypes.string_at(buffer, buffer_length.value)
668
430
    # Convert the bytestring to hexadecimal notation
669
431
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
670
432
    return hex_fpr
671
433
 
672
434
 
673
 
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
435
class tcp_handler(SocketServer.BaseRequestHandler, object):
674
436
    """A TCP request handler class.
675
437
    Instantiated by IPv6_TCPServer for each request to handle it.
676
438
    Note: This will run in its own forked process."""
677
439
    
678
440
    def handle(self):
679
441
        logger.info(u"TCP connection from: %s",
680
 
                    unicode(self.client_address))
681
 
        logger.debug(u"Pipe: %d", self.server.pipe[1])
682
 
        # Open IPC pipe to parent process
683
 
        with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
684
 
            session = (gnutls.connection
685
 
                       .ClientSession(self.request,
686
 
                                      gnutls.connection
687
 
                                      .X509Credentials()))
688
 
            
689
 
            line = self.request.makefile().readline()
690
 
            logger.debug(u"Protocol version: %r", line)
691
 
            try:
692
 
                if int(line.strip().split()[0]) > 1:
693
 
                    raise RuntimeError
694
 
            except (ValueError, IndexError, RuntimeError), error:
695
 
                logger.error(u"Unknown protocol version: %s", error)
696
 
                return
697
 
            
698
 
            # Note: gnutls.connection.X509Credentials is really a
699
 
            # generic GnuTLS certificate credentials object so long as
700
 
            # no X.509 keys are added to it.  Therefore, we can use it
701
 
            # here despite using OpenPGP certificates.
702
 
            
703
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
704
 
            #                     "+AES-256-CBC", "+SHA1",
705
 
            #                     "+COMP-NULL", "+CTYPE-OPENPGP",
706
 
            #                     "+DHE-DSS"))
707
 
            # Use a fallback default, since this MUST be set.
708
 
            priority = self.server.settings.get("priority", "NORMAL")
709
 
            (gnutls.library.functions
710
 
             .gnutls_priority_set_direct(session._c_object,
711
 
                                         priority, None))
712
 
            
713
 
            try:
714
 
                session.handshake()
715
 
            except gnutls.errors.GNUTLSError, error:
716
 
                logger.warning(u"Handshake failed: %s", error)
717
 
                # Do not run session.bye() here: the session is not
718
 
                # established.  Just abandon the request.
719
 
                return
720
 
            logger.debug(u"Handshake succeeded")
721
 
            try:
722
 
                fpr = fingerprint(peer_certificate(session))
723
 
            except (TypeError, gnutls.errors.GNUTLSError), error:
724
 
                logger.warning(u"Bad certificate: %s", error)
725
 
                session.bye()
726
 
                return
727
 
            logger.debug(u"Fingerprint: %s", fpr)
728
 
            
729
 
            for c in self.server.clients:
730
 
                if c.fingerprint == fpr:
731
 
                    client = c
732
 
                    break
733
 
            else:
734
 
                logger.warning(u"Client not found for fingerprint: %s",
735
 
                               fpr)
736
 
                ipc.write("NOTFOUND %s\n" % fpr)
737
 
                session.bye()
738
 
                return
739
 
            # Have to check if client.still_valid(), since it is
740
 
            # possible that the client timed out while establishing
741
 
            # the GnuTLS session.
742
 
            if not client.still_valid():
743
 
                logger.warning(u"Client %(name)s is invalid",
744
 
                               vars(client))
745
 
                ipc.write("INVALID %s\n" % client.name)
746
 
                session.bye()
747
 
                return
748
 
            ipc.write("SENDING %s\n" % client.name)
749
 
            sent_size = 0
750
 
            while sent_size < len(client.secret):
751
 
                sent = session.send(client.secret[sent_size:])
752
 
                logger.debug(u"Sent: %d, remaining: %d",
753
 
                             sent, len(client.secret)
754
 
                             - (sent_size + sent))
755
 
                sent_size += sent
756
 
            session.bye()
757
 
 
758
 
 
759
 
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
760
 
    """Like SocketServer.ForkingMixIn, but also pass a pipe.
761
 
    Assumes a gobject.MainLoop event loop.
762
 
    """
763
 
    def process_request(self, request, client_address):
764
 
        """This overrides and wraps the original process_request().
765
 
        This function creates a new pipe in self.pipe 
766
 
        """
767
 
        self.pipe = os.pipe()
768
 
        super(ForkingMixInWithPipe,
769
 
              self).process_request(request, client_address)
770
 
        os.close(self.pipe[1])  # close write end
771
 
        # Call "handle_ipc" for both data and EOF events
772
 
        gobject.io_add_watch(self.pipe[0],
773
 
                             gobject.IO_IN | gobject.IO_HUP,
774
 
                             self.handle_ipc)
775
 
    def handle_ipc(source, condition):
776
 
        """Dummy function; override as necessary"""
777
 
        os.close(source)
778
 
        return False
779
 
 
780
 
 
781
 
class IPv6_TCPServer(ForkingMixInWithPipe,
782
 
                     SocketServer.TCPServer, object):
783
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
 
442
                     unicode(self.client_address))
 
443
        session = gnutls.connection.ClientSession\
 
444
                  (self.request, gnutls.connection.X509Credentials())
 
445
        
 
446
        line = self.request.makefile().readline()
 
447
        logger.debug(u"Protocol version: %r", line)
 
448
        try:
 
449
            if int(line.strip().split()[0]) > 1:
 
450
                raise RuntimeError
 
451
        except (ValueError, IndexError, RuntimeError), error:
 
452
            logger.error(u"Unknown protocol version: %s", error)
 
453
            return
 
454
        
 
455
        # Note: gnutls.connection.X509Credentials is really a generic
 
456
        # GnuTLS certificate credentials object so long as no X.509
 
457
        # keys are added to it.  Therefore, we can use it here despite
 
458
        # using OpenPGP certificates.
 
459
        
 
460
        #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);
 
469
        
 
470
        try:
 
471
            session.handshake()
 
472
        except gnutls.errors.GNUTLSError, error:
 
473
            logger.warning(u"Handshake failed: %s", error)
 
474
            # Do not run session.bye() here: the session is not
 
475
            # established.  Just abandon the request.
 
476
            return
 
477
        try:
 
478
            fpr = fingerprint(peer_certificate(session))
 
479
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
480
            logger.warning(u"Bad certificate: %s", error)
 
481
            session.bye()
 
482
            return
 
483
        logger.debug(u"Fingerprint: %s", fpr)
 
484
        client = None
 
485
        for c in self.server.clients:
 
486
            if c.fingerprint == fpr:
 
487
                client = c
 
488
                break
 
489
        if not client:
 
490
            logger.warning(u"Client not found for fingerprint: %s",
 
491
                           fpr)
 
492
            session.bye()
 
493
            return
 
494
        # Have to check if client.still_valid(), since it is possible
 
495
        # that the client timed out while establishing the GnuTLS
 
496
        # session.
 
497
        if not client.still_valid():
 
498
            logger.warning(u"Client %(name)s is invalid",
 
499
                           vars(client))
 
500
            session.bye()
 
501
            return
 
502
        sent_size = 0
 
503
        while sent_size < len(client.secret):
 
504
            sent = session.send(client.secret[sent_size:])
 
505
            logger.debug(u"Sent: %d, remaining: %d",
 
506
                         sent, len(client.secret)
 
507
                         - (sent_size + sent))
 
508
            sent_size += sent
 
509
        session.bye()
 
510
 
 
511
 
 
512
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
513
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
784
514
    Attributes:
785
515
        settings:       Server settings
786
516
        clients:        Set() of Client objects
787
 
        enabled:        Boolean; whether this server is activated yet
788
517
    """
789
518
    address_family = socket.AF_INET6
790
519
    def __init__(self, *args, **kwargs):
794
523
        if "clients" in kwargs:
795
524
            self.clients = kwargs["clients"]
796
525
            del kwargs["clients"]
797
 
        if "use_ipv6" in kwargs:
798
 
            if not kwargs["use_ipv6"]:
799
 
                self.address_family = socket.AF_INET
800
 
            del kwargs["use_ipv6"]
801
 
        self.enabled = False
802
 
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
 
526
        return super(type(self), self).__init__(*args, **kwargs)
803
527
    def server_bind(self):
804
528
        """This overrides the normal server_bind() function
805
529
        to bind to an interface if one was specified, and also NOT to
817
541
                                 u" bind to interface %s",
818
542
                                 self.settings["interface"])
819
543
                else:
820
 
                    raise
 
544
                    raise error
821
545
        # Only bind(2) the socket if we really need to.
822
546
        if self.server_address[0] or self.server_address[1]:
823
547
            if not self.server_address[0]:
824
 
                if self.address_family == socket.AF_INET6:
825
 
                    any_address = "::" # in6addr_any
826
 
                else:
827
 
                    any_address = socket.INADDR_ANY
828
 
                self.server_address = (any_address,
 
548
                in6addr_any = "::"
 
549
                self.server_address = (in6addr_any,
829
550
                                       self.server_address[1])
830
551
            elif not self.server_address[1]:
831
552
                self.server_address = (self.server_address[0],
837
558
#                                            if_nametoindex
838
559
#                                            (self.settings
839
560
#                                             ["interface"]))
840
 
            return super(IPv6_TCPServer, self).server_bind()
841
 
    def server_activate(self):
842
 
        if self.enabled:
843
 
            return super(IPv6_TCPServer, self).server_activate()
844
 
    def enable(self):
845
 
        self.enabled = True
846
 
    def handle_ipc(self, source, condition, file_objects={}):
847
 
        logger.debug("Handling IPC: %r : %r", source, condition)
848
 
        
849
 
        # Turn a file descriptor into a Python file object
850
 
        if source not in file_objects:
851
 
            file_objects[source] = os.fdopen(source, "r", 1)
852
 
        
853
 
        # Read a line from the file object
854
 
        cmdline = file_objects[source].readline()
855
 
        if not cmdline:             # Empty line means end of file
856
 
            # close the IPC pipe
857
 
            logger.debug("Closing: %r", source)
858
 
            file_objects[source].close()
859
 
            del file_objects[source]
860
 
 
861
 
            # Stop calling this function
862
 
            return False
863
 
        
864
 
        logger.debug("IPC command: %r\n" % cmdline)
865
 
        
866
 
        # Parse and act on command
867
 
        cmd, args = cmdline.split(None, 1)
868
 
        if cmd == "NOTFOUND":
869
 
            pass                # xxx
870
 
        elif cmd == "INVALID":
871
 
            pass                # xxx
872
 
        elif cmd == "SENDING":
873
 
            pass                # xxx
874
 
            # client.checked_ok()
875
 
        else:
876
 
            logger.error("Unknown IPC command: %r", cmdline)
877
 
        
878
 
        # Keep calling this function
879
 
        return True
 
561
            return super(type(self), self).server_bind()
880
562
 
881
563
 
882
564
def string_to_delta(interval):
883
565
    """Parse a string and return a datetime.timedelta
884
 
    
 
566
 
885
567
    >>> string_to_delta('7d')
886
568
    datetime.timedelta(7)
887
569
    >>> string_to_delta('60s')
898
580
    timevalue = datetime.timedelta(0)
899
581
    for s in interval.split():
900
582
        try:
901
 
            suffix = unicode(s[-1])
902
 
            value = int(s[:-1])
 
583
            suffix=unicode(s[-1])
 
584
            value=int(s[:-1])
903
585
            if suffix == u"d":
904
586
                delta = datetime.timedelta(value)
905
587
            elif suffix == u"s":
921
603
def server_state_changed(state):
922
604
    """Derived from the Avahi example code"""
923
605
    if state == avahi.SERVER_COLLISION:
924
 
        logger.error(u"Zeroconf server name collision")
 
606
        logger.error(u"Server name collision")
925
607
        service.remove()
926
608
    elif state == avahi.SERVER_RUNNING:
927
609
        service.add()
929
611
 
930
612
def entry_group_state_changed(state, error):
931
613
    """Derived from the Avahi example code"""
932
 
    logger.debug(u"Avahi state change: %i", state)
 
614
    logger.debug(u"state change: %i", state)
933
615
    
934
616
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
935
 
        logger.debug(u"Zeroconf service established.")
 
617
        logger.debug(u"Service established.")
936
618
    elif state == avahi.ENTRY_GROUP_COLLISION:
937
 
        logger.warning(u"Zeroconf service name collision.")
 
619
        logger.warning(u"Service name collision.")
938
620
        service.rename()
939
621
    elif state == avahi.ENTRY_GROUP_FAILURE:
940
 
        logger.critical(u"Avahi: Error in group state changed %s",
 
622
        logger.critical(u"Error in group state changed %s",
941
623
                        unicode(error))
942
 
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
 
624
        raise AvahiGroupError("State changed: %s", str(error))
943
625
 
944
626
def if_nametoindex(interface):
945
627
    """Call the C function if_nametoindex(), or equivalent"""
946
628
    global if_nametoindex
947
629
    try:
948
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
949
 
                          (ctypes.util.find_library("c"))
950
 
                          .if_nametoindex)
 
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
951
634
    except (OSError, AttributeError):
952
635
        if "struct" not in sys.modules:
953
636
            import struct
956
639
        def if_nametoindex(interface):
957
640
            "Get an interface index the hard way, i.e. using fcntl()"
958
641
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
959
 
            with closing(socket.socket()) as s:
960
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
961
 
                                    struct.pack("16s16x", interface))
 
642
            s = socket.socket()
 
643
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
644
                                struct.pack("16s16x", interface))
 
645
            s.close()
962
646
            interface_index = struct.unpack("I", ifreq[16:20])[0]
963
647
            return interface_index
964
648
    return if_nametoindex(interface)
988
672
 
989
673
 
990
674
def main():
991
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
675
    global main_loop_started
 
676
    main_loop_started = False
 
677
    
 
678
    parser = OptionParser(version = "%%prog %s" % version)
992
679
    parser.add_option("-i", "--interface", type="string",
993
680
                      metavar="IF", help="Bind to interface IF")
994
681
    parser.add_option("-a", "--address", type="string",
995
682
                      help="Address to listen for requests on")
996
683
    parser.add_option("-p", "--port", type="int",
997
684
                      help="Port number to receive requests on")
998
 
    parser.add_option("--check", action="store_true",
 
685
    parser.add_option("--check", action="store_true", default=False,
999
686
                      help="Run self-test")
1000
687
    parser.add_option("--debug", action="store_true",
1001
688
                      help="Debug mode; run in foreground and log to"
1008
695
                      default="/etc/mandos", metavar="DIR",
1009
696
                      help="Directory to search for configuration"
1010
697
                      " files")
1011
 
    parser.add_option("--no-dbus", action="store_false",
1012
 
                      dest="use_dbus",
1013
 
                      help="Do not provide D-Bus system bus"
1014
 
                      " interface")
1015
 
    parser.add_option("--no-ipv6", action="store_false",
1016
 
                      dest="use_ipv6", help="Do not use IPv6")
1017
 
    options = parser.parse_args()[0]
 
698
    (options, args) = parser.parse_args()
1018
699
    
1019
700
    if options.check:
1020
701
        import doctest
1029
710
                        "priority":
1030
711
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1031
712
                        "servicename": "Mandos",
1032
 
                        "use_dbus": "True",
1033
 
                        "use_ipv6": "True",
1034
713
                        }
1035
714
    
1036
715
    # Parse config file for server-global settings
1039
718
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
1040
719
    # Convert the SafeConfigParser object to a dict
1041
720
    server_settings = server_config.defaults()
1042
 
    # Use the appropriate methods on the non-string config options
1043
 
    server_settings["debug"] = server_config.getboolean("DEFAULT",
1044
 
                                                        "debug")
1045
 
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
1046
 
                                                           "use_dbus")
1047
 
    server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
1048
 
                                                           "use_ipv6")
1049
 
    if server_settings["port"]:
1050
 
        server_settings["port"] = server_config.getint("DEFAULT",
1051
 
                                                       "port")
 
721
    # Use getboolean on the boolean config option
 
722
    server_settings["debug"] = server_config.getboolean\
 
723
                               ("DEFAULT", "debug")
1052
724
    del server_config
1053
725
    
1054
726
    # Override the settings from the config file with command line
1055
727
    # options, if set.
1056
728
    for option in ("interface", "address", "port", "debug",
1057
 
                   "priority", "servicename", "configdir",
1058
 
                   "use_dbus", "use_ipv6"):
 
729
                   "priority", "servicename", "configdir"):
1059
730
        value = getattr(options, option)
1060
731
        if value is not None:
1061
732
            server_settings[option] = value
1062
733
    del options
1063
734
    # Now we have our good server settings in "server_settings"
1064
735
    
1065
 
    # For convenience
1066
736
    debug = server_settings["debug"]
1067
 
    use_dbus = server_settings["use_dbus"]
1068
 
    use_ipv6 = server_settings["use_ipv6"]
1069
737
    
1070
738
    if not debug:
1071
739
        syslogger.setLevel(logging.WARNING)
1072
740
        console.setLevel(logging.WARNING)
1073
741
    
1074
742
    if server_settings["servicename"] != "Mandos":
1075
 
        syslogger.setFormatter(logging.Formatter
 
743
        syslogger.setFormatter(logging.Formatter\
1076
744
                               ('Mandos (%s): %%(levelname)s:'
1077
745
                                ' %%(message)s'
1078
746
                                % server_settings["servicename"]))
1080
748
    # Parse config file with clients
1081
749
    client_defaults = { "timeout": "1h",
1082
750
                        "interval": "5m",
1083
 
                        "checker": "fping -q -- %%(host)s",
 
751
                        "checker": "fping -q -- %(host)s",
1084
752
                        "host": "",
1085
753
                        }
1086
754
    client_config = ConfigParser.SafeConfigParser(client_defaults)
1087
755
    client_config.read(os.path.join(server_settings["configdir"],
1088
756
                                    "clients.conf"))
1089
757
    
1090
 
    clients = Set()
1091
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
1092
 
                                 server_settings["port"]),
1093
 
                                TCP_handler,
1094
 
                                settings=server_settings,
1095
 
                                clients=clients, use_ipv6=use_ipv6)
1096
 
    pidfilename = "/var/run/mandos.pid"
1097
 
    try:
1098
 
        pidfile = open(pidfilename, "w")
1099
 
    except IOError:
1100
 
        logger.error("Could not open file %r", pidfilename)
1101
 
    
1102
 
    try:
1103
 
        uid = pwd.getpwnam("_mandos").pw_uid
1104
 
        gid = pwd.getpwnam("_mandos").pw_gid
1105
 
    except KeyError:
1106
 
        try:
1107
 
            uid = pwd.getpwnam("mandos").pw_uid
1108
 
            gid = pwd.getpwnam("mandos").pw_gid
1109
 
        except KeyError:
1110
 
            try:
1111
 
                uid = pwd.getpwnam("nobody").pw_uid
1112
 
                gid = pwd.getpwnam("nogroup").pw_gid
1113
 
            except KeyError:
1114
 
                uid = 65534
1115
 
                gid = 65534
1116
 
    try:
1117
 
        os.setgid(gid)
1118
 
        os.setuid(uid)
1119
 
    except OSError, error:
1120
 
        if error[0] != errno.EPERM:
1121
 
            raise error
1122
 
    
1123
 
    # Enable all possible GnuTLS debugging
1124
 
    if debug:
1125
 
        # "Use a log level over 10 to enable all debugging options."
1126
 
        # - GnuTLS manual
1127
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1128
 
        
1129
 
        @gnutls.library.types.gnutls_log_func
1130
 
        def debug_gnutls(level, string):
1131
 
            logger.debug("GnuTLS: %s", string[:-1])
1132
 
        
1133
 
        (gnutls.library.functions
1134
 
         .gnutls_global_set_log_function(debug_gnutls))
1135
 
    
1136
758
    global service
1137
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1138
759
    service = AvahiService(name = server_settings["servicename"],
1139
 
                           servicetype = "_mandos._tcp",
1140
 
                           protocol = protocol)
 
760
                           type = "_mandos._tcp", );
1141
761
    if server_settings["interface"]:
1142
 
        service.interface = (if_nametoindex
1143
 
                             (server_settings["interface"]))
 
762
        service.interface = if_nametoindex(server_settings["interface"])
1144
763
    
1145
764
    global main_loop
1146
765
    global bus
1149
768
    DBusGMainLoop(set_as_default=True )
1150
769
    main_loop = gobject.MainLoop()
1151
770
    bus = dbus.SystemBus()
1152
 
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1153
 
                                           avahi.DBUS_PATH_SERVER),
1154
 
                            avahi.DBUS_INTERFACE_SERVER)
 
771
    server = dbus.Interface(
 
772
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
773
            avahi.DBUS_INTERFACE_SERVER )
1155
774
    # End of Avahi example code
1156
 
    if use_dbus:
1157
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
 
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()
1158
782
    
1159
783
    clients.update(Set(Client(name = section,
 
784
                              stop_hook = remove_from_clients,
1160
785
                              config
1161
 
                              = dict(client_config.items(section)),
1162
 
                              use_dbus = use_dbus)
 
786
                              = dict(client_config.items(section)))
1163
787
                       for section in client_config.sections()))
1164
788
    if not clients:
1165
 
        logger.warning(u"No clients defined")
 
789
        logger.critical(u"No clients defined")
 
790
        sys.exit(1)
1166
791
    
1167
792
    if debug:
1168
793
        # Redirect stdin so all checkers get /dev/null
1176
801
        # Close all input and output, do double fork, etc.
1177
802
        daemon()
1178
803
    
 
804
    pidfilename = "/var/run/mandos/mandos.pid"
 
805
    pid = os.getpid()
1179
806
    try:
1180
 
        pid = os.getpid()
 
807
        pidfile = open(pidfilename, "w")
1181
808
        pidfile.write(str(pid) + "\n")
1182
809
        pidfile.close()
1183
810
        del pidfile
1184
 
    except IOError:
1185
 
        logger.error(u"Could not write to file %r with PID %d",
1186
 
                     pidfilename, pid)
1187
 
    except NameError:
1188
 
        # "pidfile" was never created
1189
 
        pass
1190
 
    del pidfilename
 
811
    except IOError, err:
 
812
        logger.error(u"Could not write %s file with PID %d",
 
813
                     pidfilename, os.getpid())
1191
814
    
1192
815
    def cleanup():
1193
816
        "Cleanup function; run on exit"
1200
823
        
1201
824
        while clients:
1202
825
            client = clients.pop()
1203
 
            client.disable_hook = None
1204
 
            client.disable()
 
826
            client.stop_hook = None
 
827
            client.stop()
1205
828
    
1206
829
    atexit.register(cleanup)
1207
830
    
1210
833
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1211
834
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1212
835
    
1213
 
    if use_dbus:
1214
 
        class MandosServer(dbus.service.Object):
1215
 
            """A D-Bus proxy object"""
1216
 
            def __init__(self):
1217
 
                dbus.service.Object.__init__(self, bus, "/")
1218
 
            _interface = u"se.bsnet.fukt.Mandos"
1219
 
            
1220
 
            @dbus.service.signal(_interface, signature="oa{sv}")
1221
 
            def ClientAdded(self, objpath, properties):
1222
 
                "D-Bus signal"
1223
 
                pass
1224
 
            
1225
 
            @dbus.service.signal(_interface, signature="os")
1226
 
            def ClientRemoved(self, objpath, name):
1227
 
                "D-Bus signal"
1228
 
                pass
1229
 
            
1230
 
            @dbus.service.method(_interface, out_signature="ao")
1231
 
            def GetAllClients(self):
1232
 
                "D-Bus method"
1233
 
                return dbus.Array(c.dbus_object_path for c in clients)
1234
 
            
1235
 
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
1236
 
            def GetAllClientsWithProperties(self):
1237
 
                "D-Bus method"
1238
 
                return dbus.Dictionary(
1239
 
                    ((c.dbus_object_path, c.GetAllProperties())
1240
 
                     for c in clients),
1241
 
                    signature="oa{sv}")
1242
 
            
1243
 
            @dbus.service.method(_interface, in_signature="o")
1244
 
            def RemoveClient(self, object_path):
1245
 
                "D-Bus method"
1246
 
                for c in clients:
1247
 
                    if c.dbus_object_path == object_path:
1248
 
                        clients.remove(c)
1249
 
                        # Don't signal anything except ClientRemoved
1250
 
                        c.use_dbus = False
1251
 
                        c.disable()
1252
 
                        # Emit D-Bus signal
1253
 
                        self.ClientRemoved(object_path, c.name)
1254
 
                        return
1255
 
                raise KeyError
1256
 
            
1257
 
            del _interface
1258
 
        
1259
 
        mandos_server = MandosServer()
1260
 
    
1261
836
    for client in clients:
1262
 
        if use_dbus:
1263
 
            # Emit D-Bus signal
1264
 
            mandos_server.ClientAdded(client.dbus_object_path,
1265
 
                                      client.GetAllProperties())
1266
 
        client.enable()
1267
 
    
1268
 
    tcp_server.enable()
1269
 
    tcp_server.server_activate()
1270
 
    
 
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)
1271
844
    # Find out what port we got
1272
845
    service.port = tcp_server.socket.getsockname()[1]
1273
 
    if use_ipv6:
1274
 
        logger.info(u"Now listening on address %r, port %d,"
1275
 
                    " flowinfo %d, scope_id %d"
1276
 
                    % tcp_server.socket.getsockname())
1277
 
    else:                       # IPv4
1278
 
        logger.info(u"Now listening on address %r, port %d"
1279
 
                    % tcp_server.socket.getsockname())
 
846
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
847
                u" scope_id %d" % tcp_server.socket.getsockname())
1280
848
    
1281
849
    #service.interface = tcp_server.socket.getsockname()[3]
1282
850
    
1292
860
        
1293
861
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1294
862
                             lambda *args, **kwargs:
1295
 
                             (tcp_server.handle_request
1296
 
                              (*args[2:], **kwargs) or True))
 
863
                             tcp_server.handle_request\
 
864
                             (*args[2:], **kwargs) or True)
1297
865
        
1298
866
        logger.debug(u"Starting main loop")
 
867
        main_loop_started = True
1299
868
        main_loop.run()
1300
869
    except AvahiError, error:
1301
 
        logger.critical(u"AvahiError: %s", error)
 
870
        logger.critical(u"AvahiError: %s" + unicode(error))
1302
871
        sys.exit(1)
1303
872
    except KeyboardInterrupt:
1304
873
        if debug:
1305
 
            print >> sys.stderr
1306
 
        logger.debug("Server received KeyboardInterrupt")
1307
 
    logger.debug("Server exiting")
 
874
            print
1308
875
 
1309
876
if __name__ == '__main__':
1310
877
    main()