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  • Committer: Teddy Hogeborn
  • Date: 2008-08-17 22:42:28 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080817224228-nhor2yuv230if01i
* Makefile (DOCBOOKTOMAN): Use the local manpages/docbook.xsl file, do
                           not rely on a stylesheet declaration.

* mandos.xml: Removed <?xml-stylesheet>.  New entity "&OVERVIEW;"
              refers to "overview.xml". Changed all single quotes to
              double quotes for consistency.
  (DESCRIPTION): Use the term "TLS" and not "GnuTLS" for the protocol.
                 Refer to the "OVERVIEW" section for reason for IPv6
                 link-local addresses.
  (PURPOSE): Shortened a lot.  Refer to "OVERVIEW" section for details.
  (OVERVIEW): New section.  Include &OVERVIEW; and add a paragraph
              about what the role of this program is.
  (SECURITY/CLIENTS): Refer to the "CHECKING" section for details on
                      checking.
  (SEE ALSO): Changed from an <itemizedlist> to a <variablelist>.
              Added a short text for each entry.  Removed reference to
              plugin-runner(8mandos).  Add reference to RFC 4291 and
              RFC 4346.

* overview.xml: New file, containing a single <para>.  The idea is to
                use this in all the man pages.

* plugins.d/password-request.c: Updated comments about spurious
                                warnings.

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Lines of Context:
mandos
11
11
# and some lines in "main".
12
12
# 
13
13
# Everything else is
14
 
# Copyright © 2008,2009 Teddy Hogeborn
15
 
# Copyright © 2008,2009 Björn Påhlsson
 
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
# 
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
#     GNU General Public License for more details.
26
25
# 
27
26
# You should have received a copy of the GNU General Public License
28
 
# along with this program.  If not, see
29
 
# <http://www.gnu.org/licenses/>.
 
27
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
30
28
# 
31
29
# Contact the authors at <mandos@fukt.bsnet.se>.
32
30
# 
33
31
 
34
 
from __future__ import division, with_statement, absolute_import
 
32
from __future__ import division
35
33
 
36
34
import SocketServer
37
35
import socket
38
 
import optparse
 
36
import select
 
37
from optparse import OptionParser
39
38
import datetime
40
39
import errno
41
40
import gnutls.crypto
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
 
import pwd
59
 
from contextlib import closing
60
57
 
61
58
import dbus
62
 
import dbus.service
63
59
import gobject
64
60
import avahi
65
61
from dbus.mainloop.glib import DBusGMainLoop
66
62
import ctypes
67
 
import ctypes.util
68
63
 
69
 
version = "1.0.5"
 
64
version = "1.0"
70
65
 
71
66
logger = logging.Logger('mandos')
72
 
syslogger = (logging.handlers.SysLogHandler
73
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
 
              address = "/dev/log"))
75
 
syslogger.setFormatter(logging.Formatter
76
 
                       ('Mandos [%(process)d]: %(levelname)s:'
77
 
                        ' %(message)s'))
 
67
syslogger = logging.handlers.SysLogHandler\
 
68
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
69
             address = "/dev/log")
 
70
syslogger.setFormatter(logging.Formatter\
 
71
                        ('Mandos: %(levelname)s: %(message)s'))
78
72
logger.addHandler(syslogger)
79
73
 
80
74
console = logging.StreamHandler()
81
 
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
 
                                       ' %(levelname)s: %(message)s'))
 
75
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
 
76
                                       ' %(message)s'))
83
77
logger.addHandler(console)
84
78
 
85
79
class AvahiError(Exception):
86
 
    def __init__(self, value, *args, **kwargs):
 
80
    def __init__(self, value):
87
81
        self.value = value
88
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
89
 
    def __unicode__(self):
90
 
        return unicode(repr(self.value))
 
82
    def __str__(self):
 
83
        return repr(self.value)
91
84
 
92
85
class AvahiServiceError(AvahiError):
93
86
    pass
113
106
                  a sensible number of times
114
107
    """
115
108
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
 
                 servicetype = None, port = None, TXT = None,
117
 
                 domain = "", host = "", max_renames = 32768):
 
109
                 type = None, port = None, TXT = None, domain = "",
 
110
                 host = "", max_renames = 32768):
118
111
        self.interface = interface
119
112
        self.name = name
120
 
        self.type = servicetype
 
113
        self.type = type
121
114
        self.port = port
122
 
        self.TXT = TXT if TXT is not None else []
 
115
        if TXT is None:
 
116
            self.TXT = []
 
117
        else:
 
118
            self.TXT = TXT
123
119
        self.domain = domain
124
120
        self.host = host
125
121
        self.rename_count = 0
127
123
    def rename(self):
128
124
        """Derived from the Avahi example code"""
129
125
        if self.rename_count >= self.max_renames:
130
 
            logger.critical(u"No suitable Zeroconf service name found"
131
 
                            u" after %i retries, exiting.",
132
 
                            self.rename_count)
133
 
            raise AvahiServiceError(u"Too many renames")
 
126
            logger.critical(u"No suitable service name found after %i"
 
127
                            u" retries, exiting.", rename_count)
 
128
            raise AvahiServiceError("Too many renames")
134
129
        self.name = server.GetAlternativeServiceName(self.name)
135
 
        logger.info(u"Changing Zeroconf service name to %r ...",
136
 
                    str(self.name))
137
 
        syslogger.setFormatter(logging.Formatter
 
130
        logger.info(u"Changing name to %r ...", str(self.name))
 
131
        syslogger.setFormatter(logging.Formatter\
138
132
                               ('Mandos (%s): %%(levelname)s:'
139
 
                                ' %%(message)s' % self.name))
 
133
                               ' %%(message)s' % self.name))
140
134
        self.remove()
141
135
        self.add()
142
136
        self.rename_count += 1
148
142
        """Derived from the Avahi example code"""
149
143
        global group
150
144
        if group is None:
151
 
            group = dbus.Interface(bus.get_object
152
 
                                   (avahi.DBUS_NAME,
 
145
            group = dbus.Interface\
 
146
                    (bus.get_object(avahi.DBUS_NAME,
153
147
                                    server.EntryGroupNew()),
154
 
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
148
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
155
149
            group.connect_to_signal('StateChanged',
156
150
                                    entry_group_state_changed)
157
 
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
151
        logger.debug(u"Adding service '%s' of type '%s' ...",
158
152
                     service.name, service.type)
159
153
        group.AddService(
160
154
                self.interface,         # interface
171
165
# End of Avahi example code
172
166
 
173
167
 
174
 
def _datetime_to_dbus(dt, variant_level=0):
175
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
176
 
    return dbus.String(dt.isoformat(), variant_level=variant_level)
177
 
 
178
 
 
179
 
class Client(dbus.service.Object):
 
168
class Client(object):
180
169
    """A representation of a client host served by this server.
181
170
    Attributes:
182
 
    name:       string; from the config file, used in log messages and
183
 
                        D-Bus identifiers
 
171
    name:      string; from the config file, used in log messages
184
172
    fingerprint: string (40 or 32 hexadecimal digits); used to
185
173
                 uniquely identify the client
186
 
    secret:     bytestring; sent verbatim (over TLS) to client
187
 
    host:       string; available for use by the checker command
188
 
    created:    datetime.datetime(); (UTC) object creation
189
 
    last_enabled: datetime.datetime(); (UTC)
190
 
    enabled:    bool()
191
 
    last_checked_ok: datetime.datetime(); (UTC) or None
192
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
193
 
                                      until this client is invalid
194
 
    interval:   datetime.timedelta(); How often to start a new checker
195
 
    disable_hook:  If set, called by disable() as disable_hook(self)
196
 
    checker:    subprocess.Popen(); a running checker process used
197
 
                                    to see if the client lives.
198
 
                                    'None' if no process is running.
 
174
    secret:    bytestring; sent verbatim (over TLS) to client
 
175
    host:      string; available for use by the checker command
 
176
    created:   datetime.datetime(); object creation, not client host
 
177
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
178
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
179
                                     until this client is invalid
 
180
    interval:  datetime.timedelta(); How often to start a new checker
 
181
    stop_hook: If set, called by stop() as stop_hook(self)
 
182
    checker:   subprocess.Popen(); a running checker process used
 
183
                                   to see if the client lives.
 
184
                                   'None' if no process is running.
199
185
    checker_initiator_tag: a gobject event source tag, or None
200
 
    disable_initiator_tag:    - '' -
 
186
    stop_initiator_tag:    - '' -
201
187
    checker_callback_tag:  - '' -
202
188
    checker_command: string; External command which is run to check if
203
189
                     client lives.  %() expansions are done at
204
190
                     runtime with vars(self) as dict, so that for
205
191
                     instance %(name)s can be used in the command.
206
 
    use_dbus: bool(); Whether to provide D-Bus interface and signals
207
 
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
 
192
    Private attibutes:
 
193
    _timeout: Real variable for 'timeout'
 
194
    _interval: Real variable for 'interval'
 
195
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
196
    _interval_milliseconds: - '' -
208
197
    """
209
 
    def timeout_milliseconds(self):
210
 
        "Return the 'timeout' attribute in milliseconds"
211
 
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
212
 
                + (self.timeout.seconds * 1000)
213
 
                + (self.timeout.microseconds // 1000))
214
 
    
215
 
    def interval_milliseconds(self):
216
 
        "Return the 'interval' attribute in milliseconds"
217
 
        return ((self.interval.days * 24 * 60 * 60 * 1000)
218
 
                + (self.interval.seconds * 1000)
219
 
                + (self.interval.microseconds // 1000))
220
 
    
221
 
    def __init__(self, name = None, disable_hook=None, config=None,
222
 
                 use_dbus=True):
 
198
    def _set_timeout(self, timeout):
 
199
        "Setter function for 'timeout' attribute"
 
200
        self._timeout = timeout
 
201
        self._timeout_milliseconds = ((self.timeout.days
 
202
                                       * 24 * 60 * 60 * 1000)
 
203
                                      + (self.timeout.seconds * 1000)
 
204
                                      + (self.timeout.microseconds
 
205
                                         // 1000))
 
206
    timeout = property(lambda self: self._timeout,
 
207
                       _set_timeout)
 
208
    del _set_timeout
 
209
    def _set_interval(self, interval):
 
210
        "Setter function for 'interval' attribute"
 
211
        self._interval = interval
 
212
        self._interval_milliseconds = ((self.interval.days
 
213
                                        * 24 * 60 * 60 * 1000)
 
214
                                       + (self.interval.seconds
 
215
                                          * 1000)
 
216
                                       + (self.interval.microseconds
 
217
                                          // 1000))
 
218
    interval = property(lambda self: self._interval,
 
219
                        _set_interval)
 
220
    del _set_interval
 
221
    def __init__(self, name = None, stop_hook=None, config={}):
223
222
        """Note: the 'checker' key in 'config' sets the
224
223
        'checker_command' attribute and *not* the 'checker'
225
224
        attribute."""
226
225
        self.name = name
227
 
        if config is None:
228
 
            config = {}
229
226
        logger.debug(u"Creating client %r", self.name)
230
 
        self.use_dbus = False   # During __init__
231
227
        # Uppercase and remove spaces from fingerprint for later
232
228
        # comparison purposes with return value from the fingerprint()
233
229
        # function
234
 
        self.fingerprint = (config["fingerprint"].upper()
235
 
                            .replace(u" ", u""))
 
230
        self.fingerprint = config["fingerprint"].upper()\
 
231
                           .replace(u" ", u"")
236
232
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
237
233
        if "secret" in config:
238
234
            self.secret = config["secret"].decode(u"base64")
239
235
        elif "secfile" in config:
240
 
            with closing(open(os.path.expanduser
241
 
                              (os.path.expandvars
242
 
                               (config["secfile"])))) as secfile:
243
 
                self.secret = secfile.read()
 
236
            sf = open(config["secfile"])
 
237
            self.secret = sf.read()
 
238
            sf.close()
244
239
        else:
245
240
            raise TypeError(u"No secret or secfile for client %s"
246
241
                            % self.name)
247
242
        self.host = config.get("host", "")
248
 
        self.created = datetime.datetime.utcnow()
249
 
        self.enabled = False
250
 
        self.last_enabled = None
 
243
        self.created = datetime.datetime.now()
251
244
        self.last_checked_ok = None
252
245
        self.timeout = string_to_delta(config["timeout"])
253
246
        self.interval = string_to_delta(config["interval"])
254
 
        self.disable_hook = disable_hook
 
247
        self.stop_hook = stop_hook
255
248
        self.checker = None
256
249
        self.checker_initiator_tag = None
257
 
        self.disable_initiator_tag = None
 
250
        self.stop_initiator_tag = None
258
251
        self.checker_callback_tag = None
259
 
        self.checker_command = config["checker"]
260
 
        self.last_connect = None
261
 
        # Only now, when this client is initialized, can it show up on
262
 
        # the D-Bus
263
 
        self.use_dbus = use_dbus
264
 
        if self.use_dbus:
265
 
            self.dbus_object_path = (dbus.ObjectPath
266
 
                                     ("/clients/"
267
 
                                      + self.name.replace(".", "_")))
268
 
            dbus.service.Object.__init__(self, bus,
269
 
                                         self.dbus_object_path)
270
 
    
271
 
    def enable(self):
 
252
        self.check_command = config["checker"]
 
253
    def start(self):
272
254
        """Start this client's checker and timeout hooks"""
273
 
        self.last_enabled = datetime.datetime.utcnow()
274
255
        # Schedule a new checker to be started an 'interval' from now,
275
256
        # and every interval from then on.
276
 
        self.checker_initiator_tag = (gobject.timeout_add
277
 
                                      (self.interval_milliseconds(),
278
 
                                       self.start_checker))
 
257
        self.checker_initiator_tag = gobject.timeout_add\
 
258
                                     (self._interval_milliseconds,
 
259
                                      self.start_checker)
279
260
        # Also start a new checker *right now*.
280
261
        self.start_checker()
281
 
        # Schedule a disable() when 'timeout' has passed
282
 
        self.disable_initiator_tag = (gobject.timeout_add
283
 
                                   (self.timeout_milliseconds(),
284
 
                                    self.disable))
285
 
        self.enabled = True
286
 
        if self.use_dbus:
287
 
            # Emit D-Bus signals
288
 
            self.PropertyChanged(dbus.String(u"enabled"),
289
 
                                 dbus.Boolean(True, variant_level=1))
290
 
            self.PropertyChanged(dbus.String(u"last_enabled"),
291
 
                                 (_datetime_to_dbus(self.last_enabled,
292
 
                                                    variant_level=1)))
293
 
    
294
 
    def disable(self):
295
 
        """Disable this client."""
296
 
        if not getattr(self, "enabled", False):
 
262
        # Schedule a stop() when 'timeout' has passed
 
263
        self.stop_initiator_tag = gobject.timeout_add\
 
264
                                  (self._timeout_milliseconds,
 
265
                                   self.stop)
 
266
    def stop(self):
 
267
        """Stop this client.
 
268
        The possibility that a client might be restarted is left open,
 
269
        but not currently used."""
 
270
        # If this client doesn't have a secret, it is already stopped.
 
271
        if hasattr(self, "secret") and self.secret:
 
272
            logger.info(u"Stopping client %s", self.name)
 
273
            self.secret = None
 
274
        else:
297
275
            return False
298
 
        logger.info(u"Disabling client %s", self.name)
299
 
        if getattr(self, "disable_initiator_tag", False):
300
 
            gobject.source_remove(self.disable_initiator_tag)
301
 
            self.disable_initiator_tag = None
 
276
        if getattr(self, "stop_initiator_tag", False):
 
277
            gobject.source_remove(self.stop_initiator_tag)
 
278
            self.stop_initiator_tag = None
302
279
        if getattr(self, "checker_initiator_tag", False):
303
280
            gobject.source_remove(self.checker_initiator_tag)
304
281
            self.checker_initiator_tag = None
305
282
        self.stop_checker()
306
 
        if self.disable_hook:
307
 
            self.disable_hook(self)
308
 
        self.enabled = False
309
 
        if self.use_dbus:
310
 
            # Emit D-Bus signal
311
 
            self.PropertyChanged(dbus.String(u"enabled"),
312
 
                                 dbus.Boolean(False, variant_level=1))
 
283
        if self.stop_hook:
 
284
            self.stop_hook(self)
313
285
        # Do not run this again if called by a gobject.timeout_add
314
286
        return False
315
 
    
316
287
    def __del__(self):
317
 
        self.disable_hook = None
318
 
        self.disable()
319
 
    
320
 
    def checker_callback(self, pid, condition, command):
 
288
        self.stop_hook = None
 
289
        self.stop()
 
290
    def checker_callback(self, pid, condition):
321
291
        """The checker has completed, so take appropriate actions."""
 
292
        now = datetime.datetime.now()
322
293
        self.checker_callback_tag = None
323
294
        self.checker = None
324
 
        if self.use_dbus:
325
 
            # Emit D-Bus signal
326
 
            self.PropertyChanged(dbus.String(u"checker_running"),
327
 
                                 dbus.Boolean(False, variant_level=1))
328
 
        if os.WIFEXITED(condition):
329
 
            exitstatus = os.WEXITSTATUS(condition)
330
 
            if exitstatus == 0:
331
 
                logger.info(u"Checker for %(name)s succeeded",
332
 
                            vars(self))
333
 
                self.checked_ok()
334
 
            else:
335
 
                logger.info(u"Checker for %(name)s failed",
336
 
                            vars(self))
337
 
            if self.use_dbus:
338
 
                # Emit D-Bus signal
339
 
                self.CheckerCompleted(dbus.Int16(exitstatus),
340
 
                                      dbus.Int64(condition),
341
 
                                      dbus.String(command))
342
 
        else:
 
295
        if os.WIFEXITED(condition) \
 
296
               and (os.WEXITSTATUS(condition) == 0):
 
297
            logger.info(u"Checker for %(name)s succeeded",
 
298
                        vars(self))
 
299
            self.last_checked_ok = now
 
300
            gobject.source_remove(self.stop_initiator_tag)
 
301
            self.stop_initiator_tag = gobject.timeout_add\
 
302
                                      (self._timeout_milliseconds,
 
303
                                       self.stop)
 
304
        elif not os.WIFEXITED(condition):
343
305
            logger.warning(u"Checker for %(name)s crashed?",
344
306
                           vars(self))
345
 
            if self.use_dbus:
346
 
                # Emit D-Bus signal
347
 
                self.CheckerCompleted(dbus.Int16(-1),
348
 
                                      dbus.Int64(condition),
349
 
                                      dbus.String(command))
350
 
    
351
 
    def checked_ok(self):
352
 
        """Bump up the timeout for this client.
353
 
        This should only be called when the client has been seen,
354
 
        alive and well.
355
 
        """
356
 
        self.last_checked_ok = datetime.datetime.utcnow()
357
 
        gobject.source_remove(self.disable_initiator_tag)
358
 
        self.disable_initiator_tag = (gobject.timeout_add
359
 
                                      (self.timeout_milliseconds(),
360
 
                                       self.disable))
361
 
        if self.use_dbus:
362
 
            # Emit D-Bus signal
363
 
            self.PropertyChanged(
364
 
                dbus.String(u"last_checked_ok"),
365
 
                (_datetime_to_dbus(self.last_checked_ok,
366
 
                                   variant_level=1)))
367
 
    
 
307
        else:
 
308
            logger.info(u"Checker for %(name)s failed",
 
309
                        vars(self))
368
310
    def start_checker(self):
369
311
        """Start a new checker subprocess if one is not running.
370
312
        If a checker already exists, leave it running and do
379
321
        # is as it should be.
380
322
        if self.checker is None:
381
323
            try:
382
 
                # In case checker_command has exactly one % operator
383
 
                command = self.checker_command % self.host
 
324
                # In case check_command has exactly one % operator
 
325
                command = self.check_command % self.host
384
326
            except TypeError:
385
327
                # Escape attributes for the shell
386
328
                escaped_attrs = dict((key, re.escape(str(val)))
387
329
                                     for key, val in
388
330
                                     vars(self).iteritems())
389
331
                try:
390
 
                    command = self.checker_command % escaped_attrs
 
332
                    command = self.check_command % escaped_attrs
391
333
                except TypeError, error:
392
334
                    logger.error(u'Could not format string "%s":'
393
 
                                 u' %s', self.checker_command, error)
 
335
                                 u' %s', self.check_command, error)
394
336
                    return True # Try again later
395
337
            try:
396
338
                logger.info(u"Starting checker %r for %s",
397
339
                            command, self.name)
398
 
                # We don't need to redirect stdout and stderr, since
399
 
                # in normal mode, that is already done by daemon(),
400
 
                # and in debug mode we don't want to.  (Stdin is
401
 
                # always replaced by /dev/null.)
402
340
                self.checker = subprocess.Popen(command,
403
341
                                                close_fds=True,
404
342
                                                shell=True, cwd="/")
405
 
                if self.use_dbus:
406
 
                    # Emit D-Bus signal
407
 
                    self.CheckerStarted(command)
408
 
                    self.PropertyChanged(
409
 
                        dbus.String("checker_running"),
410
 
                        dbus.Boolean(True, variant_level=1))
411
 
                self.checker_callback_tag = (gobject.child_watch_add
412
 
                                             (self.checker.pid,
413
 
                                              self.checker_callback,
414
 
                                              data=command))
415
 
            except OSError, error:
 
343
                self.checker_callback_tag = gobject.child_watch_add\
 
344
                                            (self.checker.pid,
 
345
                                             self.checker_callback)
 
346
            except subprocess.OSError, error:
416
347
                logger.error(u"Failed to start subprocess: %s",
417
348
                             error)
418
349
        # Re-run this periodically if run by gobject.timeout_add
419
350
        return True
420
 
    
421
351
    def stop_checker(self):
422
352
        """Force the checker process, if any, to stop."""
423
353
        if self.checker_callback_tag:
435
365
            if error.errno != errno.ESRCH: # No such process
436
366
                raise
437
367
        self.checker = None
438
 
        if self.use_dbus:
439
 
            self.PropertyChanged(dbus.String(u"checker_running"),
440
 
                                 dbus.Boolean(False, variant_level=1))
441
 
    
442
368
    def still_valid(self):
443
369
        """Has the timeout not yet passed for this client?"""
444
 
        if not getattr(self, "enabled", False):
445
 
            return False
446
 
        now = datetime.datetime.utcnow()
 
370
        now = datetime.datetime.now()
447
371
        if self.last_checked_ok is None:
448
372
            return now < (self.created + self.timeout)
449
373
        else:
450
374
            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
589
375
 
590
376
 
591
377
def peer_certificate(session):
592
378
    "Return the peer's OpenPGP certificate as a bytestring"
593
379
    # If not an OpenPGP certificate...
594
 
    if (gnutls.library.functions
595
 
        .gnutls_certificate_type_get(session._c_object)
596
 
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
380
    if gnutls.library.functions.gnutls_certificate_type_get\
 
381
            (session._c_object) \
 
382
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
597
383
        # ...do the normal thing
598
384
        return session.peer_certificate
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")
 
385
    list_size = ctypes.c_uint()
 
386
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
387
        (session._c_object, ctypes.byref(list_size))
606
388
    if list_size.value == 0:
607
389
        return None
608
390
    cert = cert_list[0]
612
394
def fingerprint(openpgp):
613
395
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
614
396
    # New GnuTLS "datum" with the OpenPGP public key
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))))
 
397
    datum = gnutls.library.types.gnutls_datum_t\
 
398
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
399
                     ctypes.POINTER(ctypes.c_ubyte)),
 
400
         ctypes.c_uint(len(openpgp)))
620
401
    # New empty GnuTLS certificate
621
402
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
622
 
    (gnutls.library.functions
623
 
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
403
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
404
        (ctypes.byref(crt))
624
405
    # Import the OpenPGP public key into the certificate
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")
 
406
    gnutls.library.functions.gnutls_openpgp_crt_import\
 
407
                    (crt, ctypes.byref(datum),
 
408
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
636
409
    # New buffer for the fingerprint
637
 
    buf = ctypes.create_string_buffer(20)
638
 
    buf_len = ctypes.c_size_t()
 
410
    buffer = ctypes.create_string_buffer(20)
 
411
    buffer_length = ctypes.c_size_t()
639
412
    # Get the fingerprint from the certificate into the buffer
640
 
    (gnutls.library.functions
641
 
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
642
 
                                         ctypes.byref(buf_len)))
 
413
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
414
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
643
415
    # Deinit the certificate
644
416
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
645
417
    # Convert the buffer to a Python bytestring
646
 
    fpr = ctypes.string_at(buf, buf_len.value)
 
418
    fpr = ctypes.string_at(buffer, buffer_length.value)
647
419
    # Convert the bytestring to hexadecimal notation
648
420
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
649
421
    return hex_fpr
650
422
 
651
423
 
652
 
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
424
class tcp_handler(SocketServer.BaseRequestHandler, object):
653
425
    """A TCP request handler class.
654
426
    Instantiated by IPv6_TCPServer for each request to handle it.
655
427
    Note: This will run in its own forked process."""
656
428
    
657
429
    def handle(self):
658
430
        logger.info(u"TCP connection from: %s",
659
 
                    unicode(self.client_address))
660
 
        session = (gnutls.connection
661
 
                   .ClientSession(self.request,
662
 
                                  gnutls.connection
663
 
                                  .X509Credentials()))
 
431
                     unicode(self.client_address))
 
432
        session = gnutls.connection.ClientSession\
 
433
                  (self.request, gnutls.connection.X509Credentials())
664
434
        
665
435
        line = self.request.makefile().readline()
666
436
        logger.debug(u"Protocol version: %r", line)
677
447
        # using OpenPGP certificates.
678
448
        
679
449
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
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))
 
450
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
451
        #                "+DHE-DSS"))
 
452
        priority = "NORMAL"             # Fallback default, since this
 
453
                                        # MUST be set.
 
454
        if self.server.settings["priority"]:
 
455
            priority = self.server.settings["priority"]
 
456
        gnutls.library.functions.gnutls_priority_set_direct\
 
457
            (session._c_object, priority, None);
687
458
        
688
459
        try:
689
460
            session.handshake()
692
463
            # Do not run session.bye() here: the session is not
693
464
            # established.  Just abandon the request.
694
465
            return
695
 
        logger.debug(u"Handshake succeeded")
696
466
        try:
697
467
            fpr = fingerprint(peer_certificate(session))
698
468
        except (TypeError, gnutls.errors.GNUTLSError), error:
700
470
            session.bye()
701
471
            return
702
472
        logger.debug(u"Fingerprint: %s", fpr)
703
 
        
 
473
        client = None
704
474
        for c in self.server.clients:
705
475
            if c.fingerprint == fpr:
706
476
                client = c
707
477
                break
708
 
        else:
 
478
        if not client:
709
479
            logger.warning(u"Client not found for fingerprint: %s",
710
480
                           fpr)
711
481
            session.bye()
718
488
                           vars(client))
719
489
            session.bye()
720
490
            return
721
 
        ## This won't work here, since we're in a fork.
722
 
        # client.checked_ok()
723
491
        sent_size = 0
724
492
        while sent_size < len(client.secret):
725
493
            sent = session.send(client.secret[sent_size:])
730
498
        session.bye()
731
499
 
732
500
 
733
 
class IPv6_TCPServer(SocketServer.ForkingMixIn,
734
 
                     SocketServer.TCPServer, object):
 
501
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
735
502
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
736
503
    Attributes:
737
504
        settings:       Server settings
738
505
        clients:        Set() of Client objects
739
 
        enabled:        Boolean; whether this server is activated yet
740
506
    """
741
507
    address_family = socket.AF_INET6
742
508
    def __init__(self, *args, **kwargs):
746
512
        if "clients" in kwargs:
747
513
            self.clients = kwargs["clients"]
748
514
            del kwargs["clients"]
749
 
        self.enabled = False
750
 
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
 
515
        return super(type(self), self).__init__(*args, **kwargs)
751
516
    def server_bind(self):
752
517
        """This overrides the normal server_bind() function
753
518
        to bind to an interface if one was specified, and also NOT to
765
530
                                 u" bind to interface %s",
766
531
                                 self.settings["interface"])
767
532
                else:
768
 
                    raise
 
533
                    raise error
769
534
        # Only bind(2) the socket if we really need to.
770
535
        if self.server_address[0] or self.server_address[1]:
771
536
            if not self.server_address[0]:
782
547
#                                            if_nametoindex
783
548
#                                            (self.settings
784
549
#                                             ["interface"]))
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
 
550
            return super(type(self), self).server_bind()
791
551
 
792
552
 
793
553
def string_to_delta(interval):
794
554
    """Parse a string and return a datetime.timedelta
795
 
    
 
555
 
796
556
    >>> string_to_delta('7d')
797
557
    datetime.timedelta(7)
798
558
    >>> string_to_delta('60s')
803
563
    datetime.timedelta(1)
804
564
    >>> string_to_delta(u'1w')
805
565
    datetime.timedelta(7)
806
 
    >>> string_to_delta('5m 30s')
807
 
    datetime.timedelta(0, 330)
808
566
    """
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):
 
567
    try:
 
568
        suffix=unicode(interval[-1])
 
569
        value=int(interval[:-1])
 
570
        if suffix == u"d":
 
571
            delta = datetime.timedelta(value)
 
572
        elif suffix == u"s":
 
573
            delta = datetime.timedelta(0, value)
 
574
        elif suffix == u"m":
 
575
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
576
        elif suffix == u"h":
 
577
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
578
        elif suffix == u"w":
 
579
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
580
        else:
827
581
            raise ValueError
828
 
        timevalue += delta
829
 
    return timevalue
 
582
    except (ValueError, IndexError):
 
583
        raise ValueError
 
584
    return delta
830
585
 
831
586
 
832
587
def server_state_changed(state):
833
588
    """Derived from the Avahi example code"""
834
589
    if state == avahi.SERVER_COLLISION:
835
 
        logger.error(u"Zeroconf server name collision")
 
590
        logger.error(u"Server name collision")
836
591
        service.remove()
837
592
    elif state == avahi.SERVER_RUNNING:
838
593
        service.add()
840
595
 
841
596
def entry_group_state_changed(state, error):
842
597
    """Derived from the Avahi example code"""
843
 
    logger.debug(u"Avahi state change: %i", state)
 
598
    logger.debug(u"state change: %i", state)
844
599
    
845
600
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
846
 
        logger.debug(u"Zeroconf service established.")
 
601
        logger.debug(u"Service established.")
847
602
    elif state == avahi.ENTRY_GROUP_COLLISION:
848
 
        logger.warning(u"Zeroconf service name collision.")
 
603
        logger.warning(u"Service name collision.")
849
604
        service.rename()
850
605
    elif state == avahi.ENTRY_GROUP_FAILURE:
851
 
        logger.critical(u"Avahi: Error in group state changed %s",
 
606
        logger.critical(u"Error in group state changed %s",
852
607
                        unicode(error))
853
 
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
 
608
        raise AvahiGroupError("State changed: %s", str(error))
854
609
 
855
610
def if_nametoindex(interface):
856
611
    """Call the C function if_nametoindex(), or equivalent"""
857
612
    global if_nametoindex
858
613
    try:
859
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
860
 
                          (ctypes.util.find_library("c"))
861
 
                          .if_nametoindex)
 
614
        if "ctypes.util" not in sys.modules:
 
615
            import ctypes.util
 
616
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
617
            (ctypes.util.find_library("c")).if_nametoindex
862
618
    except (OSError, AttributeError):
863
619
        if "struct" not in sys.modules:
864
620
            import struct
867
623
        def if_nametoindex(interface):
868
624
            "Get an interface index the hard way, i.e. using fcntl()"
869
625
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
870
 
            with closing(socket.socket()) as s:
871
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
872
 
                                    struct.pack("16s16x", interface))
 
626
            s = socket.socket()
 
627
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
628
                                struct.pack("16s16x", interface))
 
629
            s.close()
873
630
            interface_index = struct.unpack("I", ifreq[16:20])[0]
874
631
            return interface_index
875
632
    return if_nametoindex(interface)
899
656
 
900
657
 
901
658
def main():
902
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
659
    global main_loop_started
 
660
    main_loop_started = False
 
661
    
 
662
    parser = OptionParser(version = "%%prog %s" % version)
903
663
    parser.add_option("-i", "--interface", type="string",
904
664
                      metavar="IF", help="Bind to interface IF")
905
665
    parser.add_option("-a", "--address", type="string",
906
666
                      help="Address to listen for requests on")
907
667
    parser.add_option("-p", "--port", type="int",
908
668
                      help="Port number to receive requests on")
909
 
    parser.add_option("--check", action="store_true",
 
669
    parser.add_option("--check", action="store_true", default=False,
910
670
                      help="Run self-test")
911
671
    parser.add_option("--debug", action="store_true",
912
672
                      help="Debug mode; run in foreground and log to"
919
679
                      default="/etc/mandos", metavar="DIR",
920
680
                      help="Directory to search for configuration"
921
681
                      " files")
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]
 
682
    (options, args) = parser.parse_args()
927
683
    
928
684
    if options.check:
929
685
        import doctest
938
694
                        "priority":
939
695
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
940
696
                        "servicename": "Mandos",
941
 
                        "use_dbus": "True",
942
697
                        }
943
698
    
944
699
    # Parse config file for server-global settings
945
700
    server_config = ConfigParser.SafeConfigParser(server_defaults)
946
701
    del server_defaults
947
702
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
703
    server_section = "server"
948
704
    # Convert the SafeConfigParser object to a dict
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")
 
705
    server_settings = dict(server_config.items(server_section))
 
706
    # Use getboolean on the boolean config option
 
707
    server_settings["debug"] = server_config.getboolean\
 
708
                               (server_section, "debug")
958
709
    del server_config
959
710
    
960
711
    # Override the settings from the config file with command line
961
712
    # options, if set.
962
713
    for option in ("interface", "address", "port", "debug",
963
 
                   "priority", "servicename", "configdir",
964
 
                   "use_dbus"):
 
714
                   "priority", "servicename", "configdir"):
965
715
        value = getattr(options, option)
966
716
        if value is not None:
967
717
            server_settings[option] = value
968
718
    del options
969
719
    # Now we have our good server settings in "server_settings"
970
720
    
971
 
    # For convenience
972
721
    debug = server_settings["debug"]
973
 
    use_dbus = server_settings["use_dbus"]
974
722
    
975
723
    if not debug:
976
724
        syslogger.setLevel(logging.WARNING)
977
725
        console.setLevel(logging.WARNING)
978
726
    
979
727
    if server_settings["servicename"] != "Mandos":
980
 
        syslogger.setFormatter(logging.Formatter
 
728
        syslogger.setFormatter(logging.Formatter\
981
729
                               ('Mandos (%s): %%(levelname)s:'
982
730
                                ' %%(message)s'
983
731
                                % server_settings["servicename"]))
986
734
    client_defaults = { "timeout": "1h",
987
735
                        "interval": "5m",
988
736
                        "checker": "fping -q -- %%(host)s",
989
 
                        "host": "",
990
737
                        }
991
738
    client_config = ConfigParser.SafeConfigParser(client_defaults)
992
739
    client_config.read(os.path.join(server_settings["configdir"],
993
740
                                    "clients.conf"))
994
741
    
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
 
    
1041
742
    global service
1042
743
    service = AvahiService(name = server_settings["servicename"],
1043
 
                           servicetype = "_mandos._tcp", )
 
744
                           type = "_mandos._tcp", );
1044
745
    if server_settings["interface"]:
1045
 
        service.interface = (if_nametoindex
1046
 
                             (server_settings["interface"]))
 
746
        service.interface = if_nametoindex(server_settings["interface"])
1047
747
    
1048
748
    global main_loop
1049
749
    global bus
1052
752
    DBusGMainLoop(set_as_default=True )
1053
753
    main_loop = gobject.MainLoop()
1054
754
    bus = dbus.SystemBus()
1055
 
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1056
 
                                           avahi.DBUS_PATH_SERVER),
1057
 
                            avahi.DBUS_INTERFACE_SERVER)
 
755
    server = dbus.Interface(
 
756
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
757
            avahi.DBUS_INTERFACE_SERVER )
1058
758
    # End of Avahi example code
1059
 
    if use_dbus:
1060
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
 
759
    
 
760
    clients = Set()
 
761
    def remove_from_clients(client):
 
762
        clients.remove(client)
 
763
        if not clients:
 
764
            logger.critical(u"No clients left, exiting")
 
765
            sys.exit()
1061
766
    
1062
767
    clients.update(Set(Client(name = section,
 
768
                              stop_hook = remove_from_clients,
1063
769
                              config
1064
 
                              = dict(client_config.items(section)),
1065
 
                              use_dbus = use_dbus)
 
770
                              = dict(client_config.items(section)))
1066
771
                       for section in client_config.sections()))
1067
772
    if not clients:
1068
 
        logger.warning(u"No clients defined")
 
773
        logger.critical(u"No clients defined")
 
774
        sys.exit(1)
1069
775
    
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
 
776
    if not debug:
1078
777
        logger.removeHandler(console)
1079
 
        # Close all input and output, do double fork, etc.
1080
778
        daemon()
1081
779
    
 
780
    pidfilename = "/var/run/mandos/mandos.pid"
 
781
    pid = os.getpid()
1082
782
    try:
1083
 
        pid = os.getpid()
 
783
        pidfile = open(pidfilename, "w")
1084
784
        pidfile.write(str(pid) + "\n")
1085
785
        pidfile.close()
1086
786
        del pidfile
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
 
787
    except IOError, err:
 
788
        logger.error(u"Could not write %s file with PID %d",
 
789
                     pidfilename, os.getpid())
1094
790
    
1095
791
    def cleanup():
1096
792
        "Cleanup function; run on exit"
1103
799
        
1104
800
        while clients:
1105
801
            client = clients.pop()
1106
 
            client.disable_hook = None
1107
 
            client.disable()
 
802
            client.stop_hook = None
 
803
            client.stop()
1108
804
    
1109
805
    atexit.register(cleanup)
1110
806
    
1113
809
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1114
810
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1115
811
    
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
 
    
1164
812
    for client in 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
 
    
 
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)
1174
820
    # Find out what port we got
1175
821
    service.port = tcp_server.socket.getsockname()[1]
1176
822
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1190
836
        
1191
837
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1192
838
                             lambda *args, **kwargs:
1193
 
                             (tcp_server.handle_request
1194
 
                              (*args[2:], **kwargs) or True))
 
839
                             tcp_server.handle_request\
 
840
                             (*args[2:], **kwargs) or True)
1195
841
        
1196
842
        logger.debug(u"Starting main loop")
 
843
        main_loop_started = True
1197
844
        main_loop.run()
1198
845
    except AvahiError, error:
1199
 
        logger.critical(u"AvahiError: %s", error)
 
846
        logger.critical(u"AvahiError: %s" + unicode(error))
1200
847
        sys.exit(1)
1201
848
    except KeyboardInterrupt:
1202
849
        if debug:
1203
 
            print >> sys.stderr
1204
 
        logger.debug("Server received KeyboardInterrupt")
1205
 
    logger.debug("Server exiting")
 
850
            print
1206
851
 
1207
852
if __name__ == '__main__':
1208
853
    main()