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  • Committer: Teddy Hogeborn
  • Date: 2009-02-07 04:50:39 UTC
  • Revision ID: teddy@fukt.bsnet.se-20090207045039-xkr6b80vtqwqrq8l
* Makefile (install-client-nokey): Move "initramfs-tools-script" from
                                   "/scripts/local-top/mandos" to
                                   "/scripts/init-premount/mandos".
  (uninstall-client): - '' -
* debian/mandos-client.dirs: - '' -
* initramfs-tools-script (PREREQ): Added "udev".

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Lines of Context:
mandos
11
11
# and some lines in "main".
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12
# 
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
 
 
69
version = "1.0.5"
64
70
 
65
71
logger = logging.Logger('mandos')
66
 
syslogger = logging.handlers.SysLogHandler\
67
 
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
68
 
             address = "/dev/log")
69
 
syslogger.setFormatter(logging.Formatter\
70
 
                        ('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'))
71
78
logger.addHandler(syslogger)
72
79
 
 
80
console = logging.StreamHandler()
 
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
 
82
                                       ' %(levelname)s: %(message)s'))
 
83
logger.addHandler(console)
73
84
 
74
85
class AvahiError(Exception):
75
 
    def __init__(self, value):
 
86
    def __init__(self, value, *args, **kwargs):
76
87
        self.value = value
77
 
    def __str__(self):
78
 
        return repr(self.value)
 
88
        super(AvahiError, self).__init__(value, *args, **kwargs)
 
89
    def __unicode__(self):
 
90
        return unicode(repr(self.value))
79
91
 
80
92
class AvahiServiceError(AvahiError):
81
93
    pass
101
113
                  a sensible number of times
102
114
    """
103
115
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
104
 
                 type = None, port = None, TXT = None, domain = "",
105
 
                 host = "", max_renames = 32768):
 
116
                 servicetype = None, port = None, TXT = None,
 
117
                 domain = "", host = "", max_renames = 32768):
106
118
        self.interface = interface
107
119
        self.name = name
108
 
        self.type = type
 
120
        self.type = servicetype
109
121
        self.port = port
110
 
        if TXT is None:
111
 
            self.TXT = []
112
 
        else:
113
 
            self.TXT = TXT
 
122
        self.TXT = TXT if TXT is not None else []
114
123
        self.domain = domain
115
124
        self.host = host
116
125
        self.rename_count = 0
 
126
        self.max_renames = max_renames
117
127
    def rename(self):
118
128
        """Derived from the Avahi example code"""
119
129
        if self.rename_count >= self.max_renames:
120
 
            logger.critical(u"No suitable service name found after %i"
121
 
                            u" retries, exiting.", rename_count)
122
 
            raise AvahiServiceError("Too many renames")
123
 
        name = server.GetAlternativeServiceName(name)
124
 
        logger.error(u"Changing name to %r ...", name)
125
 
        syslogger.setFormatter(logging.Formatter\
 
130
            logger.critical(u"No suitable Zeroconf service name found"
 
131
                            u" after %i retries, exiting.",
 
132
                            self.rename_count)
 
133
            raise AvahiServiceError(u"Too many renames")
 
134
        self.name = server.GetAlternativeServiceName(self.name)
 
135
        logger.info(u"Changing Zeroconf service name to %r ...",
 
136
                    str(self.name))
 
137
        syslogger.setFormatter(logging.Formatter
126
138
                               ('Mandos (%s): %%(levelname)s:'
127
 
                               ' %%(message)s' % name))
 
139
                                ' %%(message)s' % self.name))
128
140
        self.remove()
129
141
        self.add()
130
142
        self.rename_count += 1
136
148
        """Derived from the Avahi example code"""
137
149
        global group
138
150
        if group is None:
139
 
            group = dbus.Interface\
140
 
                    (bus.get_object(avahi.DBUS_NAME,
 
151
            group = dbus.Interface(bus.get_object
 
152
                                   (avahi.DBUS_NAME,
141
153
                                    server.EntryGroupNew()),
142
 
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
154
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
143
155
            group.connect_to_signal('StateChanged',
144
156
                                    entry_group_state_changed)
145
 
        logger.debug(u"Adding service '%s' of type '%s' ...",
 
157
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
146
158
                     service.name, service.type)
147
159
        group.AddService(
148
160
                self.interface,         # interface
159
171
# End of Avahi example code
160
172
 
161
173
 
162
 
class Client(object):
 
174
def _datetime_to_dbus(dt, variant_level=0):
 
175
    """Convert a UTC datetime.datetime() to a D-Bus type."""
 
176
    return dbus.String(dt.isoformat(), variant_level=variant_level)
 
177
 
 
178
 
 
179
class Client(dbus.service.Object):
163
180
    """A representation of a client host served by this server.
164
181
    Attributes:
165
 
    name:      string; from the config file, used in log messages
 
182
    name:       string; from the config file, used in log messages and
 
183
                        D-Bus identifiers
166
184
    fingerprint: string (40 or 32 hexadecimal digits); used to
167
185
                 uniquely identify the client
168
 
    secret:    bytestring; sent verbatim (over TLS) to client
169
 
    host:      string; available for use by the checker command
170
 
    created:   datetime.datetime(); object creation, not client host
171
 
    last_checked_ok: datetime.datetime() or None if not yet checked OK
172
 
    timeout:   datetime.timedelta(); How long from last_checked_ok
173
 
                                     until this client is invalid
174
 
    interval:  datetime.timedelta(); How often to start a new checker
175
 
    stop_hook: If set, called by stop() as stop_hook(self)
176
 
    checker:   subprocess.Popen(); a running checker process used
177
 
                                   to see if the client lives.
178
 
                                   'None' if no process is running.
 
186
    secret:     bytestring; sent verbatim (over TLS) to client
 
187
    host:       string; available for use by the checker command
 
188
    created:    datetime.datetime(); (UTC) object creation
 
189
    last_enabled: datetime.datetime(); (UTC)
 
190
    enabled:    bool()
 
191
    last_checked_ok: datetime.datetime(); (UTC) or None
 
192
    timeout:    datetime.timedelta(); How long from last_checked_ok
 
193
                                      until this client is invalid
 
194
    interval:   datetime.timedelta(); How often to start a new checker
 
195
    disable_hook:  If set, called by disable() as disable_hook(self)
 
196
    checker:    subprocess.Popen(); a running checker process used
 
197
                                    to see if the client lives.
 
198
                                    'None' if no process is running.
179
199
    checker_initiator_tag: a gobject event source tag, or None
180
 
    stop_initiator_tag:    - '' -
 
200
    disable_initiator_tag:    - '' -
181
201
    checker_callback_tag:  - '' -
182
202
    checker_command: string; External command which is run to check if
183
203
                     client lives.  %() expansions are done at
184
204
                     runtime with vars(self) as dict, so that for
185
205
                     instance %(name)s can be used in the command.
186
 
    Private attibutes:
187
 
    _timeout: Real variable for 'timeout'
188
 
    _interval: Real variable for 'interval'
189
 
    _timeout_milliseconds: Used when calling gobject.timeout_add()
190
 
    _interval_milliseconds: - '' -
 
206
    use_dbus: bool(); Whether to provide D-Bus interface and signals
 
207
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
191
208
    """
192
 
    def _set_timeout(self, timeout):
193
 
        "Setter function for 'timeout' attribute"
194
 
        self._timeout = timeout
195
 
        self._timeout_milliseconds = ((self.timeout.days
196
 
                                       * 24 * 60 * 60 * 1000)
197
 
                                      + (self.timeout.seconds * 1000)
198
 
                                      + (self.timeout.microseconds
199
 
                                         // 1000))
200
 
    timeout = property(lambda self: self._timeout,
201
 
                       _set_timeout)
202
 
    del _set_timeout
203
 
    def _set_interval(self, interval):
204
 
        "Setter function for 'interval' attribute"
205
 
        self._interval = interval
206
 
        self._interval_milliseconds = ((self.interval.days
207
 
                                        * 24 * 60 * 60 * 1000)
208
 
                                       + (self.interval.seconds
209
 
                                          * 1000)
210
 
                                       + (self.interval.microseconds
211
 
                                          // 1000))
212
 
    interval = property(lambda self: self._interval,
213
 
                        _set_interval)
214
 
    del _set_interval
215
 
    def __init__(self, name = None, stop_hook=None, config={}):
 
209
    def timeout_milliseconds(self):
 
210
        "Return the 'timeout' attribute in milliseconds"
 
211
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
 
212
                + (self.timeout.seconds * 1000)
 
213
                + (self.timeout.microseconds // 1000))
 
214
    
 
215
    def interval_milliseconds(self):
 
216
        "Return the 'interval' attribute in milliseconds"
 
217
        return ((self.interval.days * 24 * 60 * 60 * 1000)
 
218
                + (self.interval.seconds * 1000)
 
219
                + (self.interval.microseconds // 1000))
 
220
    
 
221
    def __init__(self, name = None, disable_hook=None, config=None,
 
222
                 use_dbus=True):
216
223
        """Note: the 'checker' key in 'config' sets the
217
224
        'checker_command' attribute and *not* the 'checker'
218
225
        attribute."""
219
226
        self.name = name
 
227
        if config is None:
 
228
            config = {}
220
229
        logger.debug(u"Creating client %r", self.name)
 
230
        self.use_dbus = False   # During __init__
221
231
        # Uppercase and remove spaces from fingerprint for later
222
232
        # comparison purposes with return value from the fingerprint()
223
233
        # function
224
 
        self.fingerprint = config["fingerprint"].upper()\
225
 
                           .replace(u" ", u"")
 
234
        self.fingerprint = (config["fingerprint"].upper()
 
235
                            .replace(u" ", u""))
226
236
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
227
237
        if "secret" in config:
228
238
            self.secret = config["secret"].decode(u"base64")
229
239
        elif "secfile" in config:
230
 
            sf = open(config["secfile"])
231
 
            self.secret = sf.read()
232
 
            sf.close()
 
240
            with closing(open(os.path.expanduser
 
241
                              (os.path.expandvars
 
242
                               (config["secfile"])))) as secfile:
 
243
                self.secret = secfile.read()
233
244
        else:
234
245
            raise TypeError(u"No secret or secfile for client %s"
235
246
                            % self.name)
236
247
        self.host = config.get("host", "")
237
 
        self.created = datetime.datetime.now()
 
248
        self.created = datetime.datetime.utcnow()
 
249
        self.enabled = False
 
250
        self.last_enabled = None
238
251
        self.last_checked_ok = None
239
252
        self.timeout = string_to_delta(config["timeout"])
240
253
        self.interval = string_to_delta(config["interval"])
241
 
        self.stop_hook = stop_hook
 
254
        self.disable_hook = disable_hook
242
255
        self.checker = None
243
256
        self.checker_initiator_tag = None
244
 
        self.stop_initiator_tag = None
 
257
        self.disable_initiator_tag = None
245
258
        self.checker_callback_tag = None
246
 
        self.check_command = config["checker"]
247
 
    def start(self):
 
259
        self.checker_command = config["checker"]
 
260
        self.last_connect = None
 
261
        # Only now, when this client is initialized, can it show up on
 
262
        # the D-Bus
 
263
        self.use_dbus = use_dbus
 
264
        if self.use_dbus:
 
265
            self.dbus_object_path = (dbus.ObjectPath
 
266
                                     ("/clients/"
 
267
                                      + self.name.replace(".", "_")))
 
268
            dbus.service.Object.__init__(self, bus,
 
269
                                         self.dbus_object_path)
 
270
    
 
271
    def enable(self):
248
272
        """Start this client's checker and timeout hooks"""
 
273
        self.last_enabled = datetime.datetime.utcnow()
249
274
        # Schedule a new checker to be started an 'interval' from now,
250
275
        # and every interval from then on.
251
 
        self.checker_initiator_tag = gobject.timeout_add\
252
 
                                     (self._interval_milliseconds,
253
 
                                      self.start_checker)
 
276
        self.checker_initiator_tag = (gobject.timeout_add
 
277
                                      (self.interval_milliseconds(),
 
278
                                       self.start_checker))
254
279
        # Also start a new checker *right now*.
255
280
        self.start_checker()
256
 
        # Schedule a stop() when 'timeout' has passed
257
 
        self.stop_initiator_tag = gobject.timeout_add\
258
 
                                  (self._timeout_milliseconds,
259
 
                                   self.stop)
260
 
    def stop(self):
261
 
        """Stop this client.
262
 
        The possibility that a client might be restarted is left open,
263
 
        but not currently used."""
264
 
        # If this client doesn't have a secret, it is already stopped.
265
 
        if hasattr(self, "secret") and self.secret:
266
 
            logger.info(u"Stopping client %s", self.name)
267
 
            self.secret = None
268
 
        else:
 
281
        # Schedule a disable() when 'timeout' has passed
 
282
        self.disable_initiator_tag = (gobject.timeout_add
 
283
                                   (self.timeout_milliseconds(),
 
284
                                    self.disable))
 
285
        self.enabled = True
 
286
        if self.use_dbus:
 
287
            # Emit D-Bus signals
 
288
            self.PropertyChanged(dbus.String(u"enabled"),
 
289
                                 dbus.Boolean(True, variant_level=1))
 
290
            self.PropertyChanged(dbus.String(u"last_enabled"),
 
291
                                 (_datetime_to_dbus(self.last_enabled,
 
292
                                                    variant_level=1)))
 
293
    
 
294
    def disable(self):
 
295
        """Disable this client."""
 
296
        if not getattr(self, "enabled", False):
269
297
            return False
270
 
        if getattr(self, "stop_initiator_tag", False):
271
 
            gobject.source_remove(self.stop_initiator_tag)
272
 
            self.stop_initiator_tag = None
 
298
        logger.info(u"Disabling client %s", self.name)
 
299
        if getattr(self, "disable_initiator_tag", False):
 
300
            gobject.source_remove(self.disable_initiator_tag)
 
301
            self.disable_initiator_tag = None
273
302
        if getattr(self, "checker_initiator_tag", False):
274
303
            gobject.source_remove(self.checker_initiator_tag)
275
304
            self.checker_initiator_tag = None
276
305
        self.stop_checker()
277
 
        if self.stop_hook:
278
 
            self.stop_hook(self)
 
306
        if self.disable_hook:
 
307
            self.disable_hook(self)
 
308
        self.enabled = False
 
309
        if self.use_dbus:
 
310
            # Emit D-Bus signal
 
311
            self.PropertyChanged(dbus.String(u"enabled"),
 
312
                                 dbus.Boolean(False, variant_level=1))
279
313
        # Do not run this again if called by a gobject.timeout_add
280
314
        return False
 
315
    
281
316
    def __del__(self):
282
 
        self.stop_hook = None
283
 
        self.stop()
284
 
    def checker_callback(self, pid, condition):
 
317
        self.disable_hook = None
 
318
        self.disable()
 
319
    
 
320
    def checker_callback(self, pid, condition, command):
285
321
        """The checker has completed, so take appropriate actions."""
286
 
        now = datetime.datetime.now()
287
322
        self.checker_callback_tag = None
288
323
        self.checker = None
289
 
        if os.WIFEXITED(condition) \
290
 
               and (os.WEXITSTATUS(condition) == 0):
291
 
            logger.info(u"Checker for %(name)s succeeded",
292
 
                        vars(self))
293
 
            self.last_checked_ok = now
294
 
            gobject.source_remove(self.stop_initiator_tag)
295
 
            self.stop_initiator_tag = gobject.timeout_add\
296
 
                                      (self._timeout_milliseconds,
297
 
                                       self.stop)
298
 
        elif not os.WIFEXITED(condition):
 
324
        if self.use_dbus:
 
325
            # Emit D-Bus signal
 
326
            self.PropertyChanged(dbus.String(u"checker_running"),
 
327
                                 dbus.Boolean(False, variant_level=1))
 
328
        if os.WIFEXITED(condition):
 
329
            exitstatus = os.WEXITSTATUS(condition)
 
330
            if exitstatus == 0:
 
331
                logger.info(u"Checker for %(name)s succeeded",
 
332
                            vars(self))
 
333
                self.checked_ok()
 
334
            else:
 
335
                logger.info(u"Checker for %(name)s failed",
 
336
                            vars(self))
 
337
            if self.use_dbus:
 
338
                # Emit D-Bus signal
 
339
                self.CheckerCompleted(dbus.Int16(exitstatus),
 
340
                                      dbus.Int64(condition),
 
341
                                      dbus.String(command))
 
342
        else:
299
343
            logger.warning(u"Checker for %(name)s crashed?",
300
344
                           vars(self))
301
 
        else:
302
 
            logger.info(u"Checker for %(name)s failed",
303
 
                        vars(self))
 
345
            if self.use_dbus:
 
346
                # Emit D-Bus signal
 
347
                self.CheckerCompleted(dbus.Int16(-1),
 
348
                                      dbus.Int64(condition),
 
349
                                      dbus.String(command))
 
350
    
 
351
    def checked_ok(self):
 
352
        """Bump up the timeout for this client.
 
353
        This should only be called when the client has been seen,
 
354
        alive and well.
 
355
        """
 
356
        self.last_checked_ok = datetime.datetime.utcnow()
 
357
        gobject.source_remove(self.disable_initiator_tag)
 
358
        self.disable_initiator_tag = (gobject.timeout_add
 
359
                                      (self.timeout_milliseconds(),
 
360
                                       self.disable))
 
361
        if self.use_dbus:
 
362
            # Emit D-Bus signal
 
363
            self.PropertyChanged(
 
364
                dbus.String(u"last_checked_ok"),
 
365
                (_datetime_to_dbus(self.last_checked_ok,
 
366
                                   variant_level=1)))
 
367
    
304
368
    def start_checker(self):
305
369
        """Start a new checker subprocess if one is not running.
306
370
        If a checker already exists, leave it running and do
315
379
        # is as it should be.
316
380
        if self.checker is None:
317
381
            try:
318
 
                # In case check_command has exactly one % operator
319
 
                command = self.check_command % self.host
 
382
                # In case checker_command has exactly one % operator
 
383
                command = self.checker_command % self.host
320
384
            except TypeError:
321
385
                # Escape attributes for the shell
322
386
                escaped_attrs = dict((key, re.escape(str(val)))
323
387
                                     for key, val in
324
388
                                     vars(self).iteritems())
325
389
                try:
326
 
                    command = self.check_command % escaped_attrs
 
390
                    command = self.checker_command % escaped_attrs
327
391
                except TypeError, error:
328
392
                    logger.error(u'Could not format string "%s":'
329
 
                                 u' %s', self.check_command, error)
 
393
                                 u' %s', self.checker_command, error)
330
394
                    return True # Try again later
331
395
            try:
332
396
                logger.info(u"Starting checker %r for %s",
333
397
                            command, self.name)
 
398
                # We don't need to redirect stdout and stderr, since
 
399
                # in normal mode, that is already done by daemon(),
 
400
                # and in debug mode we don't want to.  (Stdin is
 
401
                # always replaced by /dev/null.)
334
402
                self.checker = subprocess.Popen(command,
335
403
                                                close_fds=True,
336
404
                                                shell=True, cwd="/")
337
 
                self.checker_callback_tag = gobject.child_watch_add\
338
 
                                            (self.checker.pid,
339
 
                                             self.checker_callback)
340
 
            except subprocess.OSError, error:
 
405
                if self.use_dbus:
 
406
                    # Emit D-Bus signal
 
407
                    self.CheckerStarted(command)
 
408
                    self.PropertyChanged(
 
409
                        dbus.String("checker_running"),
 
410
                        dbus.Boolean(True, variant_level=1))
 
411
                self.checker_callback_tag = (gobject.child_watch_add
 
412
                                             (self.checker.pid,
 
413
                                              self.checker_callback,
 
414
                                              data=command))
 
415
            except OSError, error:
341
416
                logger.error(u"Failed to start subprocess: %s",
342
417
                             error)
343
418
        # Re-run this periodically if run by gobject.timeout_add
344
419
        return True
 
420
    
345
421
    def stop_checker(self):
346
422
        """Force the checker process, if any, to stop."""
347
423
        if self.checker_callback_tag:
359
435
            if error.errno != errno.ESRCH: # No such process
360
436
                raise
361
437
        self.checker = None
 
438
        if self.use_dbus:
 
439
            self.PropertyChanged(dbus.String(u"checker_running"),
 
440
                                 dbus.Boolean(False, variant_level=1))
 
441
    
362
442
    def still_valid(self):
363
443
        """Has the timeout not yet passed for this client?"""
364
 
        now = datetime.datetime.now()
 
444
        if not getattr(self, "enabled", False):
 
445
            return False
 
446
        now = datetime.datetime.utcnow()
365
447
        if self.last_checked_ok is None:
366
448
            return now < (self.created + self.timeout)
367
449
        else:
368
450
            return now < (self.last_checked_ok + self.timeout)
 
451
    
 
452
    ## D-Bus methods & signals
 
453
    _interface = u"se.bsnet.fukt.Mandos.Client"
 
454
    
 
455
    # CheckedOK - method
 
456
    CheckedOK = dbus.service.method(_interface)(checked_ok)
 
457
    CheckedOK.__name__ = "CheckedOK"
 
458
    
 
459
    # CheckerCompleted - signal
 
460
    @dbus.service.signal(_interface, signature="nxs")
 
461
    def CheckerCompleted(self, exitcode, waitstatus, command):
 
462
        "D-Bus signal"
 
463
        pass
 
464
    
 
465
    # CheckerStarted - signal
 
466
    @dbus.service.signal(_interface, signature="s")
 
467
    def CheckerStarted(self, command):
 
468
        "D-Bus signal"
 
469
        pass
 
470
    
 
471
    # GetAllProperties - method
 
472
    @dbus.service.method(_interface, out_signature="a{sv}")
 
473
    def GetAllProperties(self):
 
474
        "D-Bus method"
 
475
        return dbus.Dictionary({
 
476
                dbus.String("name"):
 
477
                    dbus.String(self.name, variant_level=1),
 
478
                dbus.String("fingerprint"):
 
479
                    dbus.String(self.fingerprint, variant_level=1),
 
480
                dbus.String("host"):
 
481
                    dbus.String(self.host, variant_level=1),
 
482
                dbus.String("created"):
 
483
                    _datetime_to_dbus(self.created, variant_level=1),
 
484
                dbus.String("last_enabled"):
 
485
                    (_datetime_to_dbus(self.last_enabled,
 
486
                                       variant_level=1)
 
487
                     if self.last_enabled is not None
 
488
                     else dbus.Boolean(False, variant_level=1)),
 
489
                dbus.String("enabled"):
 
490
                    dbus.Boolean(self.enabled, variant_level=1),
 
491
                dbus.String("last_checked_ok"):
 
492
                    (_datetime_to_dbus(self.last_checked_ok,
 
493
                                       variant_level=1)
 
494
                     if self.last_checked_ok is not None
 
495
                     else dbus.Boolean (False, variant_level=1)),
 
496
                dbus.String("timeout"):
 
497
                    dbus.UInt64(self.timeout_milliseconds(),
 
498
                                variant_level=1),
 
499
                dbus.String("interval"):
 
500
                    dbus.UInt64(self.interval_milliseconds(),
 
501
                                variant_level=1),
 
502
                dbus.String("checker"):
 
503
                    dbus.String(self.checker_command,
 
504
                                variant_level=1),
 
505
                dbus.String("checker_running"):
 
506
                    dbus.Boolean(self.checker is not None,
 
507
                                 variant_level=1),
 
508
                dbus.String("object_path"):
 
509
                    dbus.ObjectPath(self.dbus_object_path,
 
510
                                    variant_level=1)
 
511
                }, signature="sv")
 
512
    
 
513
    # IsStillValid - method
 
514
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
 
515
                    (still_valid))
 
516
    IsStillValid.__name__ = "IsStillValid"
 
517
    
 
518
    # PropertyChanged - signal
 
519
    @dbus.service.signal(_interface, signature="sv")
 
520
    def PropertyChanged(self, property, value):
 
521
        "D-Bus signal"
 
522
        pass
 
523
    
 
524
    # SetChecker - method
 
525
    @dbus.service.method(_interface, in_signature="s")
 
526
    def SetChecker(self, checker):
 
527
        "D-Bus setter method"
 
528
        self.checker_command = checker
 
529
        # Emit D-Bus signal
 
530
        self.PropertyChanged(dbus.String(u"checker"),
 
531
                             dbus.String(self.checker_command,
 
532
                                         variant_level=1))
 
533
    
 
534
    # SetHost - method
 
535
    @dbus.service.method(_interface, in_signature="s")
 
536
    def SetHost(self, host):
 
537
        "D-Bus setter method"
 
538
        self.host = host
 
539
        # Emit D-Bus signal
 
540
        self.PropertyChanged(dbus.String(u"host"),
 
541
                             dbus.String(self.host, variant_level=1))
 
542
    
 
543
    # SetInterval - method
 
544
    @dbus.service.method(_interface, in_signature="t")
 
545
    def SetInterval(self, milliseconds):
 
546
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
 
547
        # Emit D-Bus signal
 
548
        self.PropertyChanged(dbus.String(u"interval"),
 
549
                             (dbus.UInt64(self.interval_milliseconds(),
 
550
                                          variant_level=1)))
 
551
    
 
552
    # SetSecret - method
 
553
    @dbus.service.method(_interface, in_signature="ay",
 
554
                         byte_arrays=True)
 
555
    def SetSecret(self, secret):
 
556
        "D-Bus setter method"
 
557
        self.secret = str(secret)
 
558
    
 
559
    # SetTimeout - method
 
560
    @dbus.service.method(_interface, in_signature="t")
 
561
    def SetTimeout(self, milliseconds):
 
562
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
 
563
        # Emit D-Bus signal
 
564
        self.PropertyChanged(dbus.String(u"timeout"),
 
565
                             (dbus.UInt64(self.timeout_milliseconds(),
 
566
                                          variant_level=1)))
 
567
    
 
568
    # Enable - method
 
569
    Enable = dbus.service.method(_interface)(enable)
 
570
    Enable.__name__ = "Enable"
 
571
    
 
572
    # StartChecker - method
 
573
    @dbus.service.method(_interface)
 
574
    def StartChecker(self):
 
575
        "D-Bus method"
 
576
        self.start_checker()
 
577
    
 
578
    # Disable - method
 
579
    @dbus.service.method(_interface)
 
580
    def Disable(self):
 
581
        "D-Bus method"
 
582
        self.disable()
 
583
    
 
584
    # StopChecker - method
 
585
    StopChecker = dbus.service.method(_interface)(stop_checker)
 
586
    StopChecker.__name__ = "StopChecker"
 
587
    
 
588
    del _interface
369
589
 
370
590
 
371
591
def peer_certificate(session):
372
592
    "Return the peer's OpenPGP certificate as a bytestring"
373
593
    # If not an OpenPGP certificate...
374
 
    if gnutls.library.functions.gnutls_certificate_type_get\
375
 
            (session._c_object) \
376
 
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
594
    if (gnutls.library.functions
 
595
        .gnutls_certificate_type_get(session._c_object)
 
596
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
377
597
        # ...do the normal thing
378
598
        return session.peer_certificate
379
 
    list_size = ctypes.c_uint()
380
 
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
381
 
        (session._c_object, ctypes.byref(list_size))
 
599
    list_size = ctypes.c_uint(1)
 
600
    cert_list = (gnutls.library.functions
 
601
                 .gnutls_certificate_get_peers
 
602
                 (session._c_object, ctypes.byref(list_size)))
 
603
    if not bool(cert_list) and list_size.value != 0:
 
604
        raise gnutls.errors.GNUTLSError("error getting peer"
 
605
                                        " certificate")
382
606
    if list_size.value == 0:
383
607
        return None
384
608
    cert = cert_list[0]
388
612
def fingerprint(openpgp):
389
613
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
390
614
    # New GnuTLS "datum" with the OpenPGP public key
391
 
    datum = gnutls.library.types.gnutls_datum_t\
392
 
        (ctypes.cast(ctypes.c_char_p(openpgp),
393
 
                     ctypes.POINTER(ctypes.c_ubyte)),
394
 
         ctypes.c_uint(len(openpgp)))
 
615
    datum = (gnutls.library.types
 
616
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
617
                                         ctypes.POINTER
 
618
                                         (ctypes.c_ubyte)),
 
619
                             ctypes.c_uint(len(openpgp))))
395
620
    # New empty GnuTLS certificate
396
621
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
397
 
    gnutls.library.functions.gnutls_openpgp_crt_init\
398
 
        (ctypes.byref(crt))
 
622
    (gnutls.library.functions
 
623
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
399
624
    # Import the OpenPGP public key into the certificate
400
 
    gnutls.library.functions.gnutls_openpgp_crt_import\
401
 
                    (crt, ctypes.byref(datum),
402
 
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
625
    (gnutls.library.functions
 
626
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
627
                                gnutls.library.constants
 
628
                                .GNUTLS_OPENPGP_FMT_RAW))
 
629
    # Verify the self signature in the key
 
630
    crtverify = ctypes.c_uint()
 
631
    (gnutls.library.functions
 
632
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
 
633
    if crtverify.value != 0:
 
634
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
635
        raise gnutls.errors.CertificateSecurityError("Verify failed")
403
636
    # New buffer for the fingerprint
404
 
    buffer = ctypes.create_string_buffer(20)
405
 
    buffer_length = ctypes.c_size_t()
 
637
    buf = ctypes.create_string_buffer(20)
 
638
    buf_len = ctypes.c_size_t()
406
639
    # Get the fingerprint from the certificate into the buffer
407
 
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
408
 
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
640
    (gnutls.library.functions
 
641
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
642
                                         ctypes.byref(buf_len)))
409
643
    # Deinit the certificate
410
644
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
411
645
    # Convert the buffer to a Python bytestring
412
 
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
646
    fpr = ctypes.string_at(buf, buf_len.value)
413
647
    # Convert the bytestring to hexadecimal notation
414
648
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
415
649
    return hex_fpr
416
650
 
417
651
 
418
 
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
652
class TCP_handler(SocketServer.BaseRequestHandler, object):
419
653
    """A TCP request handler class.
420
654
    Instantiated by IPv6_TCPServer for each request to handle it.
421
655
    Note: This will run in its own forked process."""
422
656
    
423
657
    def handle(self):
424
658
        logger.info(u"TCP connection from: %s",
425
 
                     unicode(self.client_address))
426
 
        session = gnutls.connection.ClientSession\
427
 
                  (self.request, gnutls.connection.X509Credentials())
 
659
                    unicode(self.client_address))
 
660
        session = (gnutls.connection
 
661
                   .ClientSession(self.request,
 
662
                                  gnutls.connection
 
663
                                  .X509Credentials()))
428
664
        
429
665
        line = self.request.makefile().readline()
430
666
        logger.debug(u"Protocol version: %r", line)
441
677
        # using OpenPGP certificates.
442
678
        
443
679
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
444
 
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
445
 
        #                "+DHE-DSS"))
446
 
        priority = "NORMAL"             # Fallback default, since this
447
 
                                        # MUST be set.
448
 
        if self.server.settings["priority"]:
449
 
            priority = self.server.settings["priority"]
450
 
        gnutls.library.functions.gnutls_priority_set_direct\
451
 
            (session._c_object, priority, None);
 
680
        #                     "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
681
        #                     "+DHE-DSS"))
 
682
        # Use a fallback default, since this MUST be set.
 
683
        priority = self.server.settings.get("priority", "NORMAL")
 
684
        (gnutls.library.functions
 
685
         .gnutls_priority_set_direct(session._c_object,
 
686
                                     priority, None))
452
687
        
453
688
        try:
454
689
            session.handshake()
457
692
            # Do not run session.bye() here: the session is not
458
693
            # established.  Just abandon the request.
459
694
            return
 
695
        logger.debug(u"Handshake succeeded")
460
696
        try:
461
697
            fpr = fingerprint(peer_certificate(session))
462
698
        except (TypeError, gnutls.errors.GNUTLSError), error:
464
700
            session.bye()
465
701
            return
466
702
        logger.debug(u"Fingerprint: %s", fpr)
467
 
        client = None
 
703
        
468
704
        for c in self.server.clients:
469
705
            if c.fingerprint == fpr:
470
706
                client = c
471
707
                break
472
 
        if not client:
 
708
        else:
473
709
            logger.warning(u"Client not found for fingerprint: %s",
474
710
                           fpr)
475
711
            session.bye()
482
718
                           vars(client))
483
719
            session.bye()
484
720
            return
 
721
        ## This won't work here, since we're in a fork.
 
722
        # client.checked_ok()
485
723
        sent_size = 0
486
724
        while sent_size < len(client.secret):
487
725
            sent = session.send(client.secret[sent_size:])
492
730
        session.bye()
493
731
 
494
732
 
495
 
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
733
class IPv6_TCPServer(SocketServer.ForkingMixIn,
 
734
                     SocketServer.TCPServer, object):
496
735
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
497
736
    Attributes:
498
737
        settings:       Server settings
499
738
        clients:        Set() of Client objects
 
739
        enabled:        Boolean; whether this server is activated yet
500
740
    """
501
741
    address_family = socket.AF_INET6
502
742
    def __init__(self, *args, **kwargs):
506
746
        if "clients" in kwargs:
507
747
            self.clients = kwargs["clients"]
508
748
            del kwargs["clients"]
509
 
        return super(type(self), self).__init__(*args, **kwargs)
 
749
        self.enabled = False
 
750
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
510
751
    def server_bind(self):
511
752
        """This overrides the normal server_bind() function
512
753
        to bind to an interface if one was specified, and also NOT to
524
765
                                 u" bind to interface %s",
525
766
                                 self.settings["interface"])
526
767
                else:
527
 
                    raise error
 
768
                    raise
528
769
        # Only bind(2) the socket if we really need to.
529
770
        if self.server_address[0] or self.server_address[1]:
530
771
            if not self.server_address[0]:
541
782
#                                            if_nametoindex
542
783
#                                            (self.settings
543
784
#                                             ["interface"]))
544
 
            return super(type(self), self).server_bind()
 
785
            return super(IPv6_TCPServer, self).server_bind()
 
786
    def server_activate(self):
 
787
        if self.enabled:
 
788
            return super(IPv6_TCPServer, self).server_activate()
 
789
    def enable(self):
 
790
        self.enabled = True
545
791
 
546
792
 
547
793
def string_to_delta(interval):
548
794
    """Parse a string and return a datetime.timedelta
549
 
 
 
795
    
550
796
    >>> string_to_delta('7d')
551
797
    datetime.timedelta(7)
552
798
    >>> string_to_delta('60s')
557
803
    datetime.timedelta(1)
558
804
    >>> string_to_delta(u'1w')
559
805
    datetime.timedelta(7)
 
806
    >>> string_to_delta('5m 30s')
 
807
    datetime.timedelta(0, 330)
560
808
    """
561
 
    try:
562
 
        suffix=unicode(interval[-1])
563
 
        value=int(interval[:-1])
564
 
        if suffix == u"d":
565
 
            delta = datetime.timedelta(value)
566
 
        elif suffix == u"s":
567
 
            delta = datetime.timedelta(0, value)
568
 
        elif suffix == u"m":
569
 
            delta = datetime.timedelta(0, 0, 0, 0, value)
570
 
        elif suffix == u"h":
571
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
572
 
        elif suffix == u"w":
573
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
574
 
        else:
 
809
    timevalue = datetime.timedelta(0)
 
810
    for s in interval.split():
 
811
        try:
 
812
            suffix = unicode(s[-1])
 
813
            value = int(s[:-1])
 
814
            if suffix == u"d":
 
815
                delta = datetime.timedelta(value)
 
816
            elif suffix == u"s":
 
817
                delta = datetime.timedelta(0, value)
 
818
            elif suffix == u"m":
 
819
                delta = datetime.timedelta(0, 0, 0, 0, value)
 
820
            elif suffix == u"h":
 
821
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
822
            elif suffix == u"w":
 
823
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
824
            else:
 
825
                raise ValueError
 
826
        except (ValueError, IndexError):
575
827
            raise ValueError
576
 
    except (ValueError, IndexError):
577
 
        raise ValueError
578
 
    return delta
 
828
        timevalue += delta
 
829
    return timevalue
579
830
 
580
831
 
581
832
def server_state_changed(state):
582
833
    """Derived from the Avahi example code"""
583
834
    if state == avahi.SERVER_COLLISION:
584
 
        logger.error(u"Server name collision")
 
835
        logger.error(u"Zeroconf server name collision")
585
836
        service.remove()
586
837
    elif state == avahi.SERVER_RUNNING:
587
838
        service.add()
589
840
 
590
841
def entry_group_state_changed(state, error):
591
842
    """Derived from the Avahi example code"""
592
 
    logger.debug(u"state change: %i", state)
 
843
    logger.debug(u"Avahi state change: %i", state)
593
844
    
594
845
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
595
 
        logger.debug(u"Service established.")
 
846
        logger.debug(u"Zeroconf service established.")
596
847
    elif state == avahi.ENTRY_GROUP_COLLISION:
597
 
        logger.warning(u"Service name collision.")
 
848
        logger.warning(u"Zeroconf service name collision.")
598
849
        service.rename()
599
850
    elif state == avahi.ENTRY_GROUP_FAILURE:
600
 
        logger.critical(u"Error in group state changed %s",
 
851
        logger.critical(u"Avahi: Error in group state changed %s",
601
852
                        unicode(error))
602
 
        raise AvahiGroupError("State changed: %s", str(error))
 
853
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
603
854
 
604
855
def if_nametoindex(interface):
605
856
    """Call the C function if_nametoindex(), or equivalent"""
606
857
    global if_nametoindex
607
858
    try:
608
 
        if "ctypes.util" not in sys.modules:
609
 
            import ctypes.util
610
 
        if_nametoindex = ctypes.cdll.LoadLibrary\
611
 
            (ctypes.util.find_library("c")).if_nametoindex
 
859
        if_nametoindex = (ctypes.cdll.LoadLibrary
 
860
                          (ctypes.util.find_library("c"))
 
861
                          .if_nametoindex)
612
862
    except (OSError, AttributeError):
613
863
        if "struct" not in sys.modules:
614
864
            import struct
617
867
        def if_nametoindex(interface):
618
868
            "Get an interface index the hard way, i.e. using fcntl()"
619
869
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
620
 
            s = socket.socket()
621
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
622
 
                                struct.pack("16s16x", interface))
623
 
            s.close()
 
870
            with closing(socket.socket()) as s:
 
871
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
872
                                    struct.pack("16s16x", interface))
624
873
            interface_index = struct.unpack("I", ifreq[16:20])[0]
625
874
            return interface_index
626
875
    return if_nametoindex(interface)
650
899
 
651
900
 
652
901
def main():
653
 
    global main_loop_started
654
 
    main_loop_started = False
655
 
    
656
 
    parser = OptionParser()
 
902
    parser = optparse.OptionParser(version = "%%prog %s" % version)
657
903
    parser.add_option("-i", "--interface", type="string",
658
904
                      metavar="IF", help="Bind to interface IF")
659
905
    parser.add_option("-a", "--address", type="string",
660
906
                      help="Address to listen for requests on")
661
907
    parser.add_option("-p", "--port", type="int",
662
908
                      help="Port number to receive requests on")
663
 
    parser.add_option("--check", action="store_true", default=False,
 
909
    parser.add_option("--check", action="store_true",
664
910
                      help="Run self-test")
665
911
    parser.add_option("--debug", action="store_true",
666
912
                      help="Debug mode; run in foreground and log to"
673
919
                      default="/etc/mandos", metavar="DIR",
674
920
                      help="Directory to search for configuration"
675
921
                      " files")
676
 
    (options, args) = parser.parse_args()
 
922
    parser.add_option("--no-dbus", action="store_false",
 
923
                      dest="use_dbus",
 
924
                      help="Do not provide D-Bus system bus"
 
925
                      " interface")
 
926
    options = parser.parse_args()[0]
677
927
    
678
928
    if options.check:
679
929
        import doctest
688
938
                        "priority":
689
939
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
690
940
                        "servicename": "Mandos",
 
941
                        "use_dbus": "True",
691
942
                        }
692
943
    
693
944
    # Parse config file for server-global settings
694
945
    server_config = ConfigParser.SafeConfigParser(server_defaults)
695
946
    del server_defaults
696
947
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
697
 
    server_section = "server"
698
948
    # Convert the SafeConfigParser object to a dict
699
 
    server_settings = dict(server_config.items(server_section))
700
 
    # Use getboolean on the boolean config option
701
 
    server_settings["debug"] = server_config.getboolean\
702
 
                               (server_section, "debug")
 
949
    server_settings = server_config.defaults()
 
950
    # Use the appropriate methods on the non-string config options
 
951
    server_settings["debug"] = server_config.getboolean("DEFAULT",
 
952
                                                        "debug")
 
953
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
 
954
                                                           "use_dbus")
 
955
    if server_settings["port"]:
 
956
        server_settings["port"] = server_config.getint("DEFAULT",
 
957
                                                       "port")
703
958
    del server_config
704
959
    
705
960
    # Override the settings from the config file with command line
706
961
    # options, if set.
707
962
    for option in ("interface", "address", "port", "debug",
708
 
                   "priority", "servicename", "configdir"):
 
963
                   "priority", "servicename", "configdir",
 
964
                   "use_dbus"):
709
965
        value = getattr(options, option)
710
966
        if value is not None:
711
967
            server_settings[option] = value
712
968
    del options
713
969
    # Now we have our good server settings in "server_settings"
714
970
    
 
971
    # For convenience
715
972
    debug = server_settings["debug"]
 
973
    use_dbus = server_settings["use_dbus"]
716
974
    
717
975
    if not debug:
718
976
        syslogger.setLevel(logging.WARNING)
 
977
        console.setLevel(logging.WARNING)
719
978
    
720
979
    if server_settings["servicename"] != "Mandos":
721
 
        syslogger.setFormatter(logging.Formatter\
 
980
        syslogger.setFormatter(logging.Formatter
722
981
                               ('Mandos (%s): %%(levelname)s:'
723
982
                                ' %%(message)s'
724
983
                                % server_settings["servicename"]))
727
986
    client_defaults = { "timeout": "1h",
728
987
                        "interval": "5m",
729
988
                        "checker": "fping -q -- %%(host)s",
 
989
                        "host": "",
730
990
                        }
731
991
    client_config = ConfigParser.SafeConfigParser(client_defaults)
732
992
    client_config.read(os.path.join(server_settings["configdir"],
733
993
                                    "clients.conf"))
734
994
    
 
995
    clients = Set()
 
996
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
997
                                 server_settings["port"]),
 
998
                                TCP_handler,
 
999
                                settings=server_settings,
 
1000
                                clients=clients)
 
1001
    pidfilename = "/var/run/mandos.pid"
 
1002
    try:
 
1003
        pidfile = open(pidfilename, "w")
 
1004
    except IOError:
 
1005
        logger.error("Could not open file %r", pidfilename)
 
1006
    
 
1007
    try:
 
1008
        uid = pwd.getpwnam("_mandos").pw_uid
 
1009
        gid = pwd.getpwnam("_mandos").pw_gid
 
1010
    except KeyError:
 
1011
        try:
 
1012
            uid = pwd.getpwnam("mandos").pw_uid
 
1013
            gid = pwd.getpwnam("mandos").pw_gid
 
1014
        except KeyError:
 
1015
            try:
 
1016
                uid = pwd.getpwnam("nobody").pw_uid
 
1017
                gid = pwd.getpwnam("nogroup").pw_gid
 
1018
            except KeyError:
 
1019
                uid = 65534
 
1020
                gid = 65534
 
1021
    try:
 
1022
        os.setgid(gid)
 
1023
        os.setuid(uid)
 
1024
    except OSError, error:
 
1025
        if error[0] != errno.EPERM:
 
1026
            raise error
 
1027
    
 
1028
    # Enable all possible GnuTLS debugging
 
1029
    if debug:
 
1030
        # "Use a log level over 10 to enable all debugging options."
 
1031
        # - GnuTLS manual
 
1032
        gnutls.library.functions.gnutls_global_set_log_level(11)
 
1033
        
 
1034
        @gnutls.library.types.gnutls_log_func
 
1035
        def debug_gnutls(level, string):
 
1036
            logger.debug("GnuTLS: %s", string[:-1])
 
1037
        
 
1038
        (gnutls.library.functions
 
1039
         .gnutls_global_set_log_function(debug_gnutls))
 
1040
    
735
1041
    global service
736
1042
    service = AvahiService(name = server_settings["servicename"],
737
 
                           type = "_mandos._tcp", );
 
1043
                           servicetype = "_mandos._tcp", )
738
1044
    if server_settings["interface"]:
739
 
        service.interface = if_nametoindex(server_settings["interface"])
 
1045
        service.interface = (if_nametoindex
 
1046
                             (server_settings["interface"]))
740
1047
    
741
1048
    global main_loop
742
1049
    global bus
745
1052
    DBusGMainLoop(set_as_default=True )
746
1053
    main_loop = gobject.MainLoop()
747
1054
    bus = dbus.SystemBus()
748
 
    server = dbus.Interface(
749
 
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
750
 
            avahi.DBUS_INTERFACE_SERVER )
 
1055
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
1056
                                           avahi.DBUS_PATH_SERVER),
 
1057
                            avahi.DBUS_INTERFACE_SERVER)
751
1058
    # End of Avahi example code
752
 
    
753
 
    if debug:
754
 
        console = logging.StreamHandler()
755
 
        # console.setLevel(logging.DEBUG)
756
 
        console.setFormatter(logging.Formatter\
757
 
                             ('%(levelname)s: %(message)s'))
758
 
        logger.addHandler(console)
759
 
        del console
760
 
    
761
 
    clients = Set()
762
 
    def remove_from_clients(client):
763
 
        clients.remove(client)
764
 
        if not clients:
765
 
            logger.critical(u"No clients left, exiting")
766
 
            sys.exit()
 
1059
    if use_dbus:
 
1060
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
767
1061
    
768
1062
    clients.update(Set(Client(name = section,
769
 
                              stop_hook = remove_from_clients,
770
1063
                              config
771
 
                              = dict(client_config.items(section)))
 
1064
                              = dict(client_config.items(section)),
 
1065
                              use_dbus = use_dbus)
772
1066
                       for section in client_config.sections()))
773
1067
    if not clients:
774
 
        logger.critical(u"No clients defined")
775
 
        sys.exit(1)
 
1068
        logger.warning(u"No clients defined")
776
1069
    
777
 
    if not debug:
 
1070
    if debug:
 
1071
        # Redirect stdin so all checkers get /dev/null
 
1072
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
1073
        os.dup2(null, sys.stdin.fileno())
 
1074
        if null > 2:
 
1075
            os.close(null)
 
1076
    else:
 
1077
        # No console logging
 
1078
        logger.removeHandler(console)
 
1079
        # Close all input and output, do double fork, etc.
778
1080
        daemon()
779
1081
    
780
 
    pidfilename = "/var/run/mandos/mandos.pid"
781
 
    pid = os.getpid()
782
1082
    try:
783
 
        pidfile = open(pidfilename, "w")
 
1083
        pid = os.getpid()
784
1084
        pidfile.write(str(pid) + "\n")
785
1085
        pidfile.close()
786
1086
        del pidfile
787
 
    except IOError, err:
788
 
        logger.error(u"Could not write %s file with PID %d",
789
 
                     pidfilename, os.getpid())
 
1087
    except IOError:
 
1088
        logger.error(u"Could not write to file %r with PID %d",
 
1089
                     pidfilename, pid)
 
1090
    except NameError:
 
1091
        # "pidfile" was never created
 
1092
        pass
 
1093
    del pidfilename
790
1094
    
791
1095
    def cleanup():
792
1096
        "Cleanup function; run on exit"
799
1103
        
800
1104
        while clients:
801
1105
            client = clients.pop()
802
 
            client.stop_hook = None
803
 
            client.stop()
 
1106
            client.disable_hook = None
 
1107
            client.disable()
804
1108
    
805
1109
    atexit.register(cleanup)
806
1110
    
809
1113
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
810
1114
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
811
1115
    
 
1116
    if use_dbus:
 
1117
        class MandosServer(dbus.service.Object):
 
1118
            """A D-Bus proxy object"""
 
1119
            def __init__(self):
 
1120
                dbus.service.Object.__init__(self, bus, "/")
 
1121
            _interface = u"se.bsnet.fukt.Mandos"
 
1122
            
 
1123
            @dbus.service.signal(_interface, signature="oa{sv}")
 
1124
            def ClientAdded(self, objpath, properties):
 
1125
                "D-Bus signal"
 
1126
                pass
 
1127
            
 
1128
            @dbus.service.signal(_interface, signature="os")
 
1129
            def ClientRemoved(self, objpath, name):
 
1130
                "D-Bus signal"
 
1131
                pass
 
1132
            
 
1133
            @dbus.service.method(_interface, out_signature="ao")
 
1134
            def GetAllClients(self):
 
1135
                "D-Bus method"
 
1136
                return dbus.Array(c.dbus_object_path for c in clients)
 
1137
            
 
1138
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
 
1139
            def GetAllClientsWithProperties(self):
 
1140
                "D-Bus method"
 
1141
                return dbus.Dictionary(
 
1142
                    ((c.dbus_object_path, c.GetAllProperties())
 
1143
                     for c in clients),
 
1144
                    signature="oa{sv}")
 
1145
            
 
1146
            @dbus.service.method(_interface, in_signature="o")
 
1147
            def RemoveClient(self, object_path):
 
1148
                "D-Bus method"
 
1149
                for c in clients:
 
1150
                    if c.dbus_object_path == object_path:
 
1151
                        clients.remove(c)
 
1152
                        # Don't signal anything except ClientRemoved
 
1153
                        c.use_dbus = False
 
1154
                        c.disable()
 
1155
                        # Emit D-Bus signal
 
1156
                        self.ClientRemoved(object_path, c.name)
 
1157
                        return
 
1158
                raise KeyError
 
1159
            
 
1160
            del _interface
 
1161
        
 
1162
        mandos_server = MandosServer()
 
1163
    
812
1164
    for client in clients:
813
 
        client.start()
814
 
    
815
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
816
 
                                 server_settings["port"]),
817
 
                                tcp_handler,
818
 
                                settings=server_settings,
819
 
                                clients=clients)
 
1165
        if use_dbus:
 
1166
            # Emit D-Bus signal
 
1167
            mandos_server.ClientAdded(client.dbus_object_path,
 
1168
                                      client.GetAllProperties())
 
1169
        client.enable()
 
1170
    
 
1171
    tcp_server.enable()
 
1172
    tcp_server.server_activate()
 
1173
    
820
1174
    # Find out what port we got
821
1175
    service.port = tcp_server.socket.getsockname()[1]
822
1176
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
836
1190
        
837
1191
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
838
1192
                             lambda *args, **kwargs:
839
 
                             tcp_server.handle_request\
840
 
                             (*args[2:], **kwargs) or True)
 
1193
                             (tcp_server.handle_request
 
1194
                              (*args[2:], **kwargs) or True))
841
1195
        
842
1196
        logger.debug(u"Starting main loop")
843
 
        main_loop_started = True
844
1197
        main_loop.run()
845
1198
    except AvahiError, error:
846
 
        logger.critical(u"AvahiError: %s" + unicode(error))
 
1199
        logger.critical(u"AvahiError: %s", error)
847
1200
        sys.exit(1)
848
1201
    except KeyboardInterrupt:
849
1202
        if debug:
850
 
            print
 
1203
            print >> sys.stderr
 
1204
        logger.debug("Server received KeyboardInterrupt")
 
1205
    logger.debug("Server exiting")
851
1206
 
852
1207
if __name__ == '__main__':
853
1208
    main()