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Added manual pages for:
      clients.conf
      mandos.conf
      mandos
      mandos-client
      password-prompt
      password-request

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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 © 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 = "1.0.7"
70
64
 
71
65
logger = logging.Logger('mandos')
72
 
syslogger = (logging.handlers.SysLogHandler
73
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
 
              address = "/dev/log"))
75
 
syslogger.setFormatter(logging.Formatter
76
 
                       ('Mandos [%(process)d]: %(levelname)s:'
77
 
                        ' %(message)s'))
 
66
syslogger = logging.handlers.SysLogHandler\
 
67
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON)
 
68
syslogger.setFormatter(logging.Formatter\
 
69
                        ('%(levelname)s: %(message)s'))
78
70
logger.addHandler(syslogger)
 
71
del syslogger
79
72
 
80
 
console = logging.StreamHandler()
81
 
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
 
                                       ' %(levelname)s: %(message)s'))
83
 
logger.addHandler(console)
84
73
 
85
74
class AvahiError(Exception):
86
 
    def __init__(self, value, *args, **kwargs):
 
75
    def __init__(self, value):
87
76
        self.value = value
88
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
89
 
    def __unicode__(self):
90
 
        return unicode(repr(self.value))
 
77
    def __str__(self):
 
78
        return repr(self.value)
91
79
 
92
80
class AvahiServiceError(AvahiError):
93
81
    pass
113
101
                  a sensible number of times
114
102
    """
115
103
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
 
                 servicetype = None, port = None, TXT = None,
117
 
                 domain = "", host = "", max_renames = 32768,
118
 
                 protocol = avahi.PROTO_UNSPEC):
 
104
                 type = None, port = None, TXT = None, domain = "",
 
105
                 host = "", max_renames = 12):
119
106
        self.interface = interface
120
107
        self.name = name
121
 
        self.type = servicetype
 
108
        self.type = type
122
109
        self.port = port
123
 
        self.TXT = TXT if TXT is not None else []
 
110
        if TXT is None:
 
111
            self.TXT = []
 
112
        else:
 
113
            self.TXT = TXT
124
114
        self.domain = domain
125
115
        self.host = host
126
116
        self.rename_count = 0
127
 
        self.max_renames = max_renames
128
 
        self.protocol = protocol
129
117
    def rename(self):
130
118
        """Derived from the Avahi example code"""
131
119
        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")
136
 
        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
140
 
                               ('Mandos (%s): %%(levelname)s:'
141
 
                                ' %%(message)s' % self.name))
 
120
            logger.critical(u"No suitable service name found after %i"
 
121
                            u" retries, exiting.", rename_count)
 
122
            raise AvahiServiceError("Too many renames")
 
123
        name = server.GetAlternativeServiceName(name)
 
124
        logger.error(u"Changing name to %r ...", name)
142
125
        self.remove()
143
126
        self.add()
144
127
        self.rename_count += 1
150
133
        """Derived from the Avahi example code"""
151
134
        global group
152
135
        if group is None:
153
 
            group = dbus.Interface(bus.get_object
154
 
                                   (avahi.DBUS_NAME,
 
136
            group = dbus.Interface\
 
137
                    (bus.get_object(avahi.DBUS_NAME,
155
138
                                    server.EntryGroupNew()),
156
 
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
139
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
140
            group.connect_to_signal('StateChanged',
158
141
                                    entry_group_state_changed)
159
 
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
142
        logger.debug(u"Adding service '%s' of type '%s' ...",
160
143
                     service.name, service.type)
161
144
        group.AddService(
162
145
                self.interface,         # interface
163
 
                self.protocol,          # protocol
 
146
                avahi.PROTO_INET6,      # protocol
164
147
                dbus.UInt32(0),         # flags
165
148
                self.name, self.type,
166
149
                self.domain, self.host,
173
156
# End of Avahi example code
174
157
 
175
158
 
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):
 
159
class Client(object):
182
160
    """A representation of a client host served by this server.
183
161
    Attributes:
184
 
    name:       string; from the config file, used in log messages and
185
 
                        D-Bus identifiers
 
162
    name:      string; from the config file, used in log messages
186
163
    fingerprint: string (40 or 32 hexadecimal digits); used to
187
164
                 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.
 
165
    secret:    bytestring; sent verbatim (over TLS) to client
 
166
    fqdn:      string (FQDN); available for use by the checker command
 
167
    created:   datetime.datetime(); object creation, not client host
 
168
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
169
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
170
                                     until this client is invalid
 
171
    interval:  datetime.timedelta(); How often to start a new checker
 
172
    stop_hook: If set, called by stop() as stop_hook(self)
 
173
    checker:   subprocess.Popen(); a running checker process used
 
174
                                   to see if the client lives.
 
175
                                   'None' if no process is running.
201
176
    checker_initiator_tag: a gobject event source tag, or None
202
 
    disable_initiator_tag:    - '' -
 
177
    stop_initiator_tag:    - '' -
203
178
    checker_callback_tag:  - '' -
204
179
    checker_command: string; External command which is run to check if
205
180
                     client lives.  %() expansions are done at
206
181
                     runtime with vars(self) as dict, so that for
207
182
                     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
 
183
    Private attibutes:
 
184
    _timeout: Real variable for 'timeout'
 
185
    _interval: Real variable for 'interval'
 
186
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
187
    _interval_milliseconds: - '' -
211
188
    """
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):
 
189
    def _set_timeout(self, timeout):
 
190
        "Setter function for 'timeout' attribute"
 
191
        self._timeout = timeout
 
192
        self._timeout_milliseconds = ((self.timeout.days
 
193
                                       * 24 * 60 * 60 * 1000)
 
194
                                      + (self.timeout.seconds * 1000)
 
195
                                      + (self.timeout.microseconds
 
196
                                         // 1000))
 
197
    timeout = property(lambda self: self._timeout,
 
198
                       _set_timeout)
 
199
    del _set_timeout
 
200
    def _set_interval(self, interval):
 
201
        "Setter function for 'interval' attribute"
 
202
        self._interval = interval
 
203
        self._interval_milliseconds = ((self.interval.days
 
204
                                        * 24 * 60 * 60 * 1000)
 
205
                                       + (self.interval.seconds
 
206
                                          * 1000)
 
207
                                       + (self.interval.microseconds
 
208
                                          // 1000))
 
209
    interval = property(lambda self: self._interval,
 
210
                        _set_interval)
 
211
    del _set_interval
 
212
    def __init__(self, name = None, stop_hook=None, config={}):
226
213
        """Note: the 'checker' key in 'config' sets the
227
214
        'checker_command' attribute and *not* the 'checker'
228
215
        attribute."""
229
216
        self.name = name
230
 
        if config is None:
231
 
            config = {}
232
217
        logger.debug(u"Creating client %r", self.name)
233
 
        self.use_dbus = False   # During __init__
234
218
        # Uppercase and remove spaces from fingerprint for later
235
219
        # comparison purposes with return value from the fingerprint()
236
220
        # function
237
 
        self.fingerprint = (config["fingerprint"].upper()
238
 
                            .replace(u" ", u""))
 
221
        self.fingerprint = config["fingerprint"].upper()\
 
222
                           .replace(u" ", u"")
239
223
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
240
224
        if "secret" in config:
241
225
            self.secret = config["secret"].decode(u"base64")
242
226
        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()
 
227
            sf = open(config["secfile"])
 
228
            self.secret = sf.read()
 
229
            sf.close()
247
230
        else:
248
231
            raise TypeError(u"No secret or secfile for client %s"
249
232
                            % self.name)
250
 
        self.host = config.get("host", "")
251
 
        self.created = datetime.datetime.utcnow()
252
 
        self.enabled = False
253
 
        self.last_enabled = None
 
233
        self.fqdn = config.get("fqdn", "")
 
234
        self.created = datetime.datetime.now()
254
235
        self.last_checked_ok = None
255
236
        self.timeout = string_to_delta(config["timeout"])
256
237
        self.interval = string_to_delta(config["interval"])
257
 
        self.disable_hook = disable_hook
 
238
        self.stop_hook = stop_hook
258
239
        self.checker = None
259
240
        self.checker_initiator_tag = None
260
 
        self.disable_initiator_tag = None
 
241
        self.stop_initiator_tag = None
261
242
        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):
 
243
        self.check_command = config["checker"]
 
244
    def start(self):
276
245
        """Start this client's checker and timeout hooks"""
277
 
        self.last_enabled = datetime.datetime.utcnow()
278
246
        # Schedule a new checker to be started an 'interval' from now,
279
247
        # and every interval from then on.
280
 
        self.checker_initiator_tag = (gobject.timeout_add
281
 
                                      (self.interval_milliseconds(),
282
 
                                       self.start_checker))
 
248
        self.checker_initiator_tag = gobject.timeout_add\
 
249
                                     (self._interval_milliseconds,
 
250
                                      self.start_checker)
283
251
        # Also start a new checker *right now*.
284
252
        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):
 
253
        # Schedule a stop() when 'timeout' has passed
 
254
        self.stop_initiator_tag = gobject.timeout_add\
 
255
                                  (self._timeout_milliseconds,
 
256
                                   self.stop)
 
257
    def stop(self):
 
258
        """Stop this client.
 
259
        The possibility that a client might be restarted is left open,
 
260
        but not currently used."""
 
261
        # If this client doesn't have a secret, it is already stopped.
 
262
        if self.secret:
 
263
            logger.info(u"Stopping client %s", self.name)
 
264
            self.secret = None
 
265
        else:
301
266
            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
 
267
        if getattr(self, "stop_initiator_tag", False):
 
268
            gobject.source_remove(self.stop_initiator_tag)
 
269
            self.stop_initiator_tag = None
306
270
        if getattr(self, "checker_initiator_tag", False):
307
271
            gobject.source_remove(self.checker_initiator_tag)
308
272
            self.checker_initiator_tag = None
309
273
        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))
 
274
        if self.stop_hook:
 
275
            self.stop_hook(self)
317
276
        # Do not run this again if called by a gobject.timeout_add
318
277
        return False
319
 
    
320
278
    def __del__(self):
321
 
        self.disable_hook = None
322
 
        self.disable()
323
 
    
324
 
    def checker_callback(self, pid, condition, command):
 
279
        self.stop_hook = None
 
280
        self.stop()
 
281
    def checker_callback(self, pid, condition):
325
282
        """The checker has completed, so take appropriate actions."""
 
283
        now = datetime.datetime.now()
326
284
        self.checker_callback_tag = None
327
285
        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:
 
286
        if os.WIFEXITED(condition) \
 
287
               and (os.WEXITSTATUS(condition) == 0):
 
288
            logger.info(u"Checker for %(name)s succeeded",
 
289
                        vars(self))
 
290
            self.last_checked_ok = now
 
291
            gobject.source_remove(self.stop_initiator_tag)
 
292
            self.stop_initiator_tag = gobject.timeout_add\
 
293
                                      (self._timeout_milliseconds,
 
294
                                       self.stop)
 
295
        elif not os.WIFEXITED(condition):
347
296
            logger.warning(u"Checker for %(name)s crashed?",
348
297
                           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
 
    
 
298
        else:
 
299
            logger.info(u"Checker for %(name)s failed",
 
300
                        vars(self))
372
301
    def start_checker(self):
373
302
        """Start a new checker subprocess if one is not running.
374
303
        If a checker already exists, leave it running and do
381
310
        # checkers alone, the checker would have to take more time
382
311
        # than 'timeout' for the client to be declared invalid, which
383
312
        # 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
313
        if self.checker is None:
395
314
            try:
396
 
                # In case checker_command has exactly one % operator
397
 
                command = self.checker_command % self.host
 
315
                # In case check_command has exactly one % operator
 
316
                command = self.check_command % self.fqdn
398
317
            except TypeError:
399
318
                # Escape attributes for the shell
400
319
                escaped_attrs = dict((key, re.escape(str(val)))
401
320
                                     for key, val in
402
321
                                     vars(self).iteritems())
403
322
                try:
404
 
                    command = self.checker_command % escaped_attrs
 
323
                    command = self.check_command % escaped_attrs
405
324
                except TypeError, error:
406
325
                    logger.error(u'Could not format string "%s":'
407
 
                                 u' %s', self.checker_command, error)
 
326
                                 u' %s', self.check_command, error)
408
327
                    return True # Try again later
409
 
                self.current_checker_command = command
410
328
            try:
411
329
                logger.info(u"Starting checker %r for %s",
412
330
                            command, self.name)
413
 
                # We don't need to redirect stdout and stderr, since
414
 
                # in normal mode, that is already done by daemon(),
415
 
                # and in debug mode we don't want to.  (Stdin is
416
 
                # always replaced by /dev/null.)
417
331
                self.checker = subprocess.Popen(command,
418
332
                                                close_fds=True,
419
333
                                                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)
436
 
            except OSError, error:
 
334
                self.checker_callback_tag = gobject.child_watch_add\
 
335
                                            (self.checker.pid,
 
336
                                             self.checker_callback)
 
337
            except subprocess.OSError, error:
437
338
                logger.error(u"Failed to start subprocess: %s",
438
339
                             error)
439
340
        # Re-run this periodically if run by gobject.timeout_add
440
341
        return True
441
 
    
442
342
    def stop_checker(self):
443
343
        """Force the checker process, if any, to stop."""
444
344
        if self.checker_callback_tag:
446
346
            self.checker_callback_tag = None
447
347
        if getattr(self, "checker", None) is None:
448
348
            return
449
 
        logger.debug(u"Stopping checker for %(name)s", vars(self))
 
349
        logger.debug("Stopping checker for %(name)s", vars(self))
450
350
        try:
451
351
            os.kill(self.checker.pid, signal.SIGTERM)
452
352
            #os.sleep(0.5)
456
356
            if error.errno != errno.ESRCH: # No such process
457
357
                raise
458
358
        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
359
    def still_valid(self):
464
360
        """Has the timeout not yet passed for this client?"""
465
 
        if not getattr(self, "enabled", False):
466
 
            return False
467
 
        now = datetime.datetime.utcnow()
 
361
        now = datetime.datetime.now()
468
362
        if self.last_checked_ok is None:
469
363
            return now < (self.created + self.timeout)
470
364
        else:
471
365
            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
366
 
611
367
 
612
368
def peer_certificate(session):
613
369
    "Return the peer's OpenPGP certificate as a bytestring"
614
370
    # 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):
 
371
    if gnutls.library.functions.gnutls_certificate_type_get\
 
372
            (session._c_object) \
 
373
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
618
374
        # ...do the normal thing
619
375
        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")
 
376
    list_size = ctypes.c_uint()
 
377
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
378
        (session._c_object, ctypes.byref(list_size))
627
379
    if list_size.value == 0:
628
380
        return None
629
381
    cert = cert_list[0]
633
385
def fingerprint(openpgp):
634
386
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
635
387
    # 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))))
 
388
    datum = gnutls.library.types.gnutls_datum_t\
 
389
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
390
                     ctypes.POINTER(ctypes.c_ubyte)),
 
391
         ctypes.c_uint(len(openpgp)))
641
392
    # New empty GnuTLS certificate
642
393
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
643
 
    (gnutls.library.functions
644
 
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
394
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
395
        (ctypes.byref(crt))
645
396
    # 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))
650
 
    # 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:
655
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
656
 
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
397
    gnutls.library.functions.gnutls_openpgp_crt_import\
 
398
                    (crt, ctypes.byref(datum),
 
399
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
657
400
    # New buffer for the fingerprint
658
 
    buf = ctypes.create_string_buffer(20)
659
 
    buf_len = ctypes.c_size_t()
 
401
    buffer = ctypes.create_string_buffer(20)
 
402
    buffer_length = ctypes.c_size_t()
660
403
    # 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)))
 
404
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
405
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
664
406
    # Deinit the certificate
665
407
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
666
408
    # Convert the buffer to a Python bytestring
667
 
    fpr = ctypes.string_at(buf, buf_len.value)
 
409
    fpr = ctypes.string_at(buffer, buffer_length.value)
668
410
    # Convert the bytestring to hexadecimal notation
669
411
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
670
412
    return hex_fpr
671
413
 
672
414
 
673
 
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
415
class tcp_handler(SocketServer.BaseRequestHandler, object):
674
416
    """A TCP request handler class.
675
417
    Instantiated by IPv6_TCPServer for each request to handle it.
676
418
    Note: This will run in its own forked process."""
677
419
    
678
420
    def handle(self):
679
421
        logger.info(u"TCP connection from: %s",
680
 
                    unicode(self.client_address))
681
 
        session = (gnutls.connection
682
 
                   .ClientSession(self.request,
683
 
                                  gnutls.connection
684
 
                                  .X509Credentials()))
 
422
                     unicode(self.client_address))
 
423
        session = gnutls.connection.ClientSession\
 
424
                  (self.request, gnutls.connection.X509Credentials())
685
425
        
686
426
        line = self.request.makefile().readline()
687
427
        logger.debug(u"Protocol version: %r", line)
698
438
        # using OpenPGP certificates.
699
439
        
700
440
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
701
 
        #                     "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
702
 
        #                     "+DHE-DSS"))
703
 
        # Use a fallback default, since this MUST be set.
704
 
        priority = self.server.settings.get("priority", "NORMAL")
705
 
        (gnutls.library.functions
706
 
         .gnutls_priority_set_direct(session._c_object,
707
 
                                     priority, None))
 
441
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
442
        #                "+DHE-DSS"))
 
443
        priority = "NORMAL"             # Fallback default, since this
 
444
                                        # MUST be set.
 
445
        if self.server.settings["priority"]:
 
446
            priority = self.server.settings["priority"]
 
447
        gnutls.library.functions.gnutls_priority_set_direct\
 
448
            (session._c_object, priority, None);
708
449
        
709
450
        try:
710
451
            session.handshake()
713
454
            # Do not run session.bye() here: the session is not
714
455
            # established.  Just abandon the request.
715
456
            return
716
 
        logger.debug(u"Handshake succeeded")
717
457
        try:
718
458
            fpr = fingerprint(peer_certificate(session))
719
459
        except (TypeError, gnutls.errors.GNUTLSError), error:
721
461
            session.bye()
722
462
            return
723
463
        logger.debug(u"Fingerprint: %s", fpr)
724
 
        
 
464
        client = None
725
465
        for c in self.server.clients:
726
466
            if c.fingerprint == fpr:
727
467
                client = c
728
468
                break
729
 
        else:
 
469
        if not client:
730
470
            logger.warning(u"Client not found for fingerprint: %s",
731
471
                           fpr)
732
472
            session.bye()
739
479
                           vars(client))
740
480
            session.bye()
741
481
            return
742
 
        ## This won't work here, since we're in a fork.
743
 
        # client.checked_ok()
744
482
        sent_size = 0
745
483
        while sent_size < len(client.secret):
746
484
            sent = session.send(client.secret[sent_size:])
751
489
        session.bye()
752
490
 
753
491
 
754
 
class IPv6_TCPServer(SocketServer.ForkingMixIn,
755
 
                     SocketServer.TCPServer, object):
756
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
 
492
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
493
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
757
494
    Attributes:
758
495
        settings:       Server settings
759
496
        clients:        Set() of Client objects
760
 
        enabled:        Boolean; whether this server is activated yet
761
497
    """
762
498
    address_family = socket.AF_INET6
763
499
    def __init__(self, *args, **kwargs):
767
503
        if "clients" in kwargs:
768
504
            self.clients = kwargs["clients"]
769
505
            del kwargs["clients"]
770
 
        if "use_ipv6" in kwargs:
771
 
            if not kwargs["use_ipv6"]:
772
 
                self.address_family = socket.AF_INET
773
 
            del kwargs["use_ipv6"]
774
 
        self.enabled = False
775
 
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
 
506
        return super(type(self), self).__init__(*args, **kwargs)
776
507
    def server_bind(self):
777
508
        """This overrides the normal server_bind() function
778
509
        to bind to an interface if one was specified, and also NOT to
790
521
                                 u" bind to interface %s",
791
522
                                 self.settings["interface"])
792
523
                else:
793
 
                    raise
 
524
                    raise error
794
525
        # Only bind(2) the socket if we really need to.
795
526
        if self.server_address[0] or self.server_address[1]:
796
527
            if not self.server_address[0]:
797
 
                if self.address_family == socket.AF_INET6:
798
 
                    any_address = "::" # in6addr_any
799
 
                else:
800
 
                    any_address = socket.INADDR_ANY
801
 
                self.server_address = (any_address,
 
528
                in6addr_any = "::"
 
529
                self.server_address = (in6addr_any,
802
530
                                       self.server_address[1])
803
531
            elif not self.server_address[1]:
804
532
                self.server_address = (self.server_address[0],
810
538
#                                            if_nametoindex
811
539
#                                            (self.settings
812
540
#                                             ["interface"]))
813
 
            return super(IPv6_TCPServer, self).server_bind()
814
 
    def server_activate(self):
815
 
        if self.enabled:
816
 
            return super(IPv6_TCPServer, self).server_activate()
817
 
    def enable(self):
818
 
        self.enabled = True
 
541
            return super(type(self), self).server_bind()
819
542
 
820
543
 
821
544
def string_to_delta(interval):
822
545
    """Parse a string and return a datetime.timedelta
823
 
    
 
546
 
824
547
    >>> string_to_delta('7d')
825
548
    datetime.timedelta(7)
826
549
    >>> string_to_delta('60s')
831
554
    datetime.timedelta(1)
832
555
    >>> string_to_delta(u'1w')
833
556
    datetime.timedelta(7)
834
 
    >>> string_to_delta('5m 30s')
835
 
    datetime.timedelta(0, 330)
836
557
    """
837
 
    timevalue = datetime.timedelta(0)
838
 
    for s in interval.split():
839
 
        try:
840
 
            suffix = unicode(s[-1])
841
 
            value = int(s[:-1])
842
 
            if suffix == u"d":
843
 
                delta = datetime.timedelta(value)
844
 
            elif suffix == u"s":
845
 
                delta = datetime.timedelta(0, value)
846
 
            elif suffix == u"m":
847
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
848
 
            elif suffix == u"h":
849
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
850
 
            elif suffix == u"w":
851
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
852
 
            else:
853
 
                raise ValueError
854
 
        except (ValueError, IndexError):
 
558
    try:
 
559
        suffix=unicode(interval[-1])
 
560
        value=int(interval[:-1])
 
561
        if suffix == u"d":
 
562
            delta = datetime.timedelta(value)
 
563
        elif suffix == u"s":
 
564
            delta = datetime.timedelta(0, value)
 
565
        elif suffix == u"m":
 
566
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
567
        elif suffix == u"h":
 
568
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
569
        elif suffix == u"w":
 
570
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
571
        else:
855
572
            raise ValueError
856
 
        timevalue += delta
857
 
    return timevalue
 
573
    except (ValueError, IndexError):
 
574
        raise ValueError
 
575
    return delta
858
576
 
859
577
 
860
578
def server_state_changed(state):
861
579
    """Derived from the Avahi example code"""
862
580
    if state == avahi.SERVER_COLLISION:
863
 
        logger.error(u"Zeroconf server name collision")
 
581
        logger.error(u"Server name collision")
864
582
        service.remove()
865
583
    elif state == avahi.SERVER_RUNNING:
866
584
        service.add()
868
586
 
869
587
def entry_group_state_changed(state, error):
870
588
    """Derived from the Avahi example code"""
871
 
    logger.debug(u"Avahi state change: %i", state)
 
589
    logger.debug(u"state change: %i", state)
872
590
    
873
591
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
874
 
        logger.debug(u"Zeroconf service established.")
 
592
        logger.debug(u"Service established.")
875
593
    elif state == avahi.ENTRY_GROUP_COLLISION:
876
 
        logger.warning(u"Zeroconf service name collision.")
 
594
        logger.warning(u"Service name collision.")
877
595
        service.rename()
878
596
    elif state == avahi.ENTRY_GROUP_FAILURE:
879
 
        logger.critical(u"Avahi: Error in group state changed %s",
 
597
        logger.critical(u"Error in group state changed %s",
880
598
                        unicode(error))
881
 
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
 
599
        raise AvahiGroupError("State changed: %s", str(error))
882
600
 
883
601
def if_nametoindex(interface):
884
602
    """Call the C function if_nametoindex(), or equivalent"""
885
603
    global if_nametoindex
886
604
    try:
887
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
888
 
                          (ctypes.util.find_library("c"))
889
 
                          .if_nametoindex)
 
605
        if "ctypes.util" not in sys.modules:
 
606
            import ctypes.util
 
607
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
608
            (ctypes.util.find_library("c")).if_nametoindex
890
609
    except (OSError, AttributeError):
891
610
        if "struct" not in sys.modules:
892
611
            import struct
895
614
        def if_nametoindex(interface):
896
615
            "Get an interface index the hard way, i.e. using fcntl()"
897
616
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
898
 
            with closing(socket.socket()) as s:
899
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
900
 
                                    struct.pack("16s16x", interface))
 
617
            s = socket.socket()
 
618
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
619
                                struct.pack("16s16x", interface))
 
620
            s.close()
901
621
            interface_index = struct.unpack("I", ifreq[16:20])[0]
902
622
            return interface_index
903
623
    return if_nametoindex(interface)
927
647
 
928
648
 
929
649
def main():
930
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
650
    global main_loop_started
 
651
    main_loop_started = False
 
652
    
 
653
    parser = OptionParser()
931
654
    parser.add_option("-i", "--interface", type="string",
932
655
                      metavar="IF", help="Bind to interface IF")
933
656
    parser.add_option("-a", "--address", type="string",
934
657
                      help="Address to listen for requests on")
935
658
    parser.add_option("-p", "--port", type="int",
936
659
                      help="Port number to receive requests on")
937
 
    parser.add_option("--check", action="store_true",
 
660
    parser.add_option("--check", action="store_true", default=False,
938
661
                      help="Run self-test")
939
662
    parser.add_option("--debug", action="store_true",
940
663
                      help="Debug mode; run in foreground and log to"
947
670
                      default="/etc/mandos", metavar="DIR",
948
671
                      help="Directory to search for configuration"
949
672
                      " files")
950
 
    parser.add_option("--no-dbus", action="store_false",
951
 
                      dest="use_dbus",
952
 
                      help=optparse.SUPPRESS_HELP) # XXX: Not done yet
953
 
    parser.add_option("--no-ipv6", action="store_false",
954
 
                      dest="use_ipv6", help="Do not use IPv6")
955
 
    options = parser.parse_args()[0]
 
673
    (options, args) = parser.parse_args()
956
674
    
957
675
    if options.check:
958
676
        import doctest
967
685
                        "priority":
968
686
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
969
687
                        "servicename": "Mandos",
970
 
                        "use_dbus": "True",
971
 
                        "use_ipv6": "True",
972
688
                        }
973
689
    
974
690
    # Parse config file for server-global settings
975
691
    server_config = ConfigParser.SafeConfigParser(server_defaults)
976
692
    del server_defaults
977
693
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
694
    server_section = "server"
978
695
    # Convert the SafeConfigParser object to a dict
979
 
    server_settings = server_config.defaults()
980
 
    # Use the appropriate methods on the non-string config options
981
 
    server_settings["debug"] = server_config.getboolean("DEFAULT",
982
 
                                                        "debug")
983
 
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
984
 
                                                           "use_dbus")
985
 
    server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
986
 
                                                           "use_ipv6")
987
 
    if server_settings["port"]:
988
 
        server_settings["port"] = server_config.getint("DEFAULT",
989
 
                                                       "port")
 
696
    server_settings = dict(server_config.items(server_section))
 
697
    # Use getboolean on the boolean config option
 
698
    server_settings["debug"] = server_config.getboolean\
 
699
                               (server_section, "debug")
990
700
    del server_config
991
701
    
992
702
    # Override the settings from the config file with command line
993
703
    # options, if set.
994
704
    for option in ("interface", "address", "port", "debug",
995
 
                   "priority", "servicename", "configdir",
996
 
                   "use_dbus", "use_ipv6"):
 
705
                   "priority", "servicename", "configdir"):
997
706
        value = getattr(options, option)
998
707
        if value is not None:
999
708
            server_settings[option] = value
1000
709
    del options
1001
710
    # Now we have our good server settings in "server_settings"
1002
711
    
1003
 
    # For convenience
1004
 
    debug = server_settings["debug"]
1005
 
    use_dbus = server_settings["use_dbus"]
1006
 
    use_dbus = False            # XXX: Not done yet
1007
 
    use_ipv6 = server_settings["use_ipv6"]
1008
 
    
1009
 
    if not debug:
1010
 
        syslogger.setLevel(logging.WARNING)
1011
 
        console.setLevel(logging.WARNING)
1012
 
    
1013
 
    if server_settings["servicename"] != "Mandos":
1014
 
        syslogger.setFormatter(logging.Formatter
1015
 
                               ('Mandos (%s): %%(levelname)s:'
1016
 
                                ' %%(message)s'
1017
 
                                % server_settings["servicename"]))
1018
 
    
1019
712
    # Parse config file with clients
1020
713
    client_defaults = { "timeout": "1h",
1021
714
                        "interval": "5m",
1022
 
                        "checker": "fping -q -- %%(host)s",
1023
 
                        "host": "",
 
715
                        "checker": "fping -q -- %%(fqdn)s",
1024
716
                        }
1025
717
    client_config = ConfigParser.SafeConfigParser(client_defaults)
1026
718
    client_config.read(os.path.join(server_settings["configdir"],
1027
719
                                    "clients.conf"))
1028
720
    
1029
 
    clients = Set()
1030
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
1031
 
                                 server_settings["port"]),
1032
 
                                TCP_handler,
1033
 
                                settings=server_settings,
1034
 
                                clients=clients, use_ipv6=use_ipv6)
1035
 
    pidfilename = "/var/run/mandos.pid"
1036
 
    try:
1037
 
        pidfile = open(pidfilename, "w")
1038
 
    except IOError:
1039
 
        logger.error("Could not open file %r", pidfilename)
1040
 
    
1041
 
    try:
1042
 
        uid = pwd.getpwnam("_mandos").pw_uid
1043
 
        gid = pwd.getpwnam("_mandos").pw_gid
1044
 
    except KeyError:
1045
 
        try:
1046
 
            uid = pwd.getpwnam("mandos").pw_uid
1047
 
            gid = pwd.getpwnam("mandos").pw_gid
1048
 
        except KeyError:
1049
 
            try:
1050
 
                uid = pwd.getpwnam("nobody").pw_uid
1051
 
                gid = pwd.getpwnam("nogroup").pw_gid
1052
 
            except KeyError:
1053
 
                uid = 65534
1054
 
                gid = 65534
1055
 
    try:
1056
 
        os.setgid(gid)
1057
 
        os.setuid(uid)
1058
 
    except OSError, error:
1059
 
        if error[0] != errno.EPERM:
1060
 
            raise error
1061
 
    
1062
 
    # Enable all possible GnuTLS debugging
1063
 
    if debug:
1064
 
        # "Use a log level over 10 to enable all debugging options."
1065
 
        # - GnuTLS manual
1066
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1067
 
        
1068
 
        @gnutls.library.types.gnutls_log_func
1069
 
        def debug_gnutls(level, string):
1070
 
            logger.debug("GnuTLS: %s", string[:-1])
1071
 
        
1072
 
        (gnutls.library.functions
1073
 
         .gnutls_global_set_log_function(debug_gnutls))
1074
 
    
1075
721
    global service
1076
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1077
722
    service = AvahiService(name = server_settings["servicename"],
1078
 
                           servicetype = "_mandos._tcp",
1079
 
                           protocol = protocol)
 
723
                           type = "_mandos._tcp", );
1080
724
    if server_settings["interface"]:
1081
 
        service.interface = (if_nametoindex
1082
 
                             (server_settings["interface"]))
 
725
        service.interface = if_nametoindex(server_settings["interface"])
1083
726
    
1084
727
    global main_loop
1085
728
    global bus
1088
731
    DBusGMainLoop(set_as_default=True )
1089
732
    main_loop = gobject.MainLoop()
1090
733
    bus = dbus.SystemBus()
1091
 
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1092
 
                                           avahi.DBUS_PATH_SERVER),
1093
 
                            avahi.DBUS_INTERFACE_SERVER)
 
734
    server = dbus.Interface(
 
735
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
736
            avahi.DBUS_INTERFACE_SERVER )
1094
737
    # End of Avahi example code
1095
 
    if use_dbus:
1096
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
 
738
    
 
739
    debug = server_settings["debug"]
 
740
    
 
741
    if debug:
 
742
        console = logging.StreamHandler()
 
743
        # console.setLevel(logging.DEBUG)
 
744
        console.setFormatter(logging.Formatter\
 
745
                             ('%(levelname)s: %(message)s'))
 
746
        logger.addHandler(console)
 
747
        del console
 
748
    
 
749
    clients = Set()
 
750
    def remove_from_clients(client):
 
751
        clients.remove(client)
 
752
        if not clients:
 
753
            logger.critical(u"No clients left, exiting")
 
754
            sys.exit()
1097
755
    
1098
756
    clients.update(Set(Client(name = section,
 
757
                              stop_hook = remove_from_clients,
1099
758
                              config
1100
 
                              = dict(client_config.items(section)),
1101
 
                              use_dbus = use_dbus)
 
759
                              = dict(client_config.items(section)))
1102
760
                       for section in client_config.sections()))
1103
 
    if not clients:
1104
 
        logger.warning(u"No clients defined")
1105
761
    
1106
 
    if debug:
1107
 
        # Redirect stdin so all checkers get /dev/null
1108
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1109
 
        os.dup2(null, sys.stdin.fileno())
1110
 
        if null > 2:
1111
 
            os.close(null)
1112
 
    else:
1113
 
        # No console logging
1114
 
        logger.removeHandler(console)
1115
 
        # Close all input and output, do double fork, etc.
 
762
    if not debug:
1116
763
        daemon()
1117
764
    
1118
 
    try:
1119
 
        pid = os.getpid()
1120
 
        pidfile.write(str(pid) + "\n")
1121
 
        pidfile.close()
1122
 
        del pidfile
1123
 
    except IOError:
1124
 
        logger.error(u"Could not write to file %r with PID %d",
1125
 
                     pidfilename, pid)
1126
 
    except NameError:
1127
 
        # "pidfile" was never created
1128
 
        pass
1129
 
    del pidfilename
1130
 
    
1131
765
    def cleanup():
1132
766
        "Cleanup function; run on exit"
1133
767
        global group
1139
773
        
1140
774
        while clients:
1141
775
            client = clients.pop()
1142
 
            client.disable_hook = None
1143
 
            client.disable()
 
776
            client.stop_hook = None
 
777
            client.stop()
1144
778
    
1145
779
    atexit.register(cleanup)
1146
780
    
1149
783
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1150
784
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1151
785
    
1152
 
    if use_dbus:
1153
 
        class MandosServer(dbus.service.Object):
1154
 
            """A D-Bus proxy object"""
1155
 
            def __init__(self):
1156
 
                dbus.service.Object.__init__(self, bus, "/")
1157
 
            _interface = u"se.bsnet.fukt.Mandos"
1158
 
            
1159
 
            @dbus.service.signal(_interface, signature="oa{sv}")
1160
 
            def ClientAdded(self, objpath, properties):
1161
 
                "D-Bus signal"
1162
 
                pass
1163
 
            
1164
 
            @dbus.service.signal(_interface, signature="os")
1165
 
            def ClientRemoved(self, objpath, name):
1166
 
                "D-Bus signal"
1167
 
                pass
1168
 
            
1169
 
            @dbus.service.method(_interface, out_signature="ao")
1170
 
            def GetAllClients(self):
1171
 
                "D-Bus method"
1172
 
                return dbus.Array(c.dbus_object_path for c in clients)
1173
 
            
1174
 
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
1175
 
            def GetAllClientsWithProperties(self):
1176
 
                "D-Bus method"
1177
 
                return dbus.Dictionary(
1178
 
                    ((c.dbus_object_path, c.GetAllProperties())
1179
 
                     for c in clients),
1180
 
                    signature="oa{sv}")
1181
 
            
1182
 
            @dbus.service.method(_interface, in_signature="o")
1183
 
            def RemoveClient(self, object_path):
1184
 
                "D-Bus method"
1185
 
                for c in clients:
1186
 
                    if c.dbus_object_path == object_path:
1187
 
                        clients.remove(c)
1188
 
                        # Don't signal anything except ClientRemoved
1189
 
                        c.use_dbus = False
1190
 
                        c.disable()
1191
 
                        # Emit D-Bus signal
1192
 
                        self.ClientRemoved(object_path, c.name)
1193
 
                        return
1194
 
                raise KeyError
1195
 
            
1196
 
            del _interface
1197
 
        
1198
 
        mandos_server = MandosServer()
1199
 
    
1200
786
    for client in clients:
1201
 
        if use_dbus:
1202
 
            # Emit D-Bus signal
1203
 
            mandos_server.ClientAdded(client.dbus_object_path,
1204
 
                                      client.GetAllProperties())
1205
 
        client.enable()
1206
 
    
1207
 
    tcp_server.enable()
1208
 
    tcp_server.server_activate()
1209
 
    
 
787
        client.start()
 
788
    
 
789
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
790
                                 server_settings["port"]),
 
791
                                tcp_handler,
 
792
                                settings=server_settings,
 
793
                                clients=clients)
1210
794
    # Find out what port we got
1211
795
    service.port = tcp_server.socket.getsockname()[1]
1212
 
    if use_ipv6:
1213
 
        logger.info(u"Now listening on address %r, port %d,"
1214
 
                    " flowinfo %d, scope_id %d"
1215
 
                    % tcp_server.socket.getsockname())
1216
 
    else:                       # IPv4
1217
 
        logger.info(u"Now listening on address %r, port %d"
1218
 
                    % tcp_server.socket.getsockname())
 
796
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
797
                u" scope_id %d" % tcp_server.socket.getsockname())
1219
798
    
1220
799
    #service.interface = tcp_server.socket.getsockname()[3]
1221
800
    
1231
810
        
1232
811
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1233
812
                             lambda *args, **kwargs:
1234
 
                             (tcp_server.handle_request
1235
 
                              (*args[2:], **kwargs) or True))
 
813
                             tcp_server.handle_request\
 
814
                             (*args[2:], **kwargs) or True)
1236
815
        
1237
 
        logger.debug(u"Starting main loop")
 
816
        logger.debug("Starting main loop")
 
817
        main_loop_started = True
1238
818
        main_loop.run()
1239
819
    except AvahiError, error:
1240
 
        logger.critical(u"AvahiError: %s", error)
 
820
        logger.critical(u"AvahiError: %s" + unicode(error))
1241
821
        sys.exit(1)
1242
822
    except KeyboardInterrupt:
1243
823
        if debug:
1244
 
            print >> sys.stderr
1245
 
        logger.debug("Server received KeyboardInterrupt")
1246
 
    logger.debug("Server exiting")
 
824
            print
1247
825
 
1248
826
if __name__ == '__main__':
1249
827
    main()