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Lines of Context:
mandos
11
11
# and some lines in "main".
12
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 = "1.0.5"
 
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,
118
 
                 protocol = avahi.PROTO_UNSPEC):
 
109
                 type = None, port = None, TXT = None, domain = "",
 
110
                 host = "", max_renames = 32768):
119
111
        self.interface = interface
120
112
        self.name = name
121
 
        self.type = servicetype
 
113
        self.type = type
122
114
        self.port = port
123
 
        self.TXT = TXT if TXT is not None else []
 
115
        if TXT is None:
 
116
            self.TXT = []
 
117
        else:
 
118
            self.TXT = TXT
124
119
        self.domain = domain
125
120
        self.host = host
126
121
        self.rename_count = 0
127
122
        self.max_renames = max_renames
128
 
        self.protocol = protocol
129
123
    def rename(self):
130
124
        """Derived from the Avahi example code"""
131
125
        if self.rename_count >= self.max_renames:
132
 
            logger.critical(u"No suitable Zeroconf service name found"
133
 
                            u" after %i retries, exiting.",
134
 
                            self.rename_count)
135
 
            raise AvahiServiceError(u"Too many renames")
 
126
            logger.critical(u"No suitable service name found after %i"
 
127
                            u" retries, exiting.", rename_count)
 
128
            raise AvahiServiceError("Too many renames")
136
129
        self.name = server.GetAlternativeServiceName(self.name)
137
 
        logger.info(u"Changing Zeroconf service name to %r ...",
138
 
                    str(self.name))
139
 
        syslogger.setFormatter(logging.Formatter
 
130
        logger.info(u"Changing name to %r ...", str(self.name))
 
131
        syslogger.setFormatter(logging.Formatter\
140
132
                               ('Mandos (%s): %%(levelname)s:'
141
 
                                ' %%(message)s' % self.name))
 
133
                               ' %%(message)s' % self.name))
142
134
        self.remove()
143
135
        self.add()
144
136
        self.rename_count += 1
150
142
        """Derived from the Avahi example code"""
151
143
        global group
152
144
        if group is None:
153
 
            group = dbus.Interface(bus.get_object
154
 
                                   (avahi.DBUS_NAME,
 
145
            group = dbus.Interface\
 
146
                    (bus.get_object(avahi.DBUS_NAME,
155
147
                                    server.EntryGroupNew()),
156
 
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
148
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
149
            group.connect_to_signal('StateChanged',
158
150
                                    entry_group_state_changed)
159
 
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
151
        logger.debug(u"Adding service '%s' of type '%s' ...",
160
152
                     service.name, service.type)
161
153
        group.AddService(
162
154
                self.interface,         # interface
163
 
                self.protocol,          # protocol
 
155
                avahi.PROTO_INET6,      # protocol
164
156
                dbus.UInt32(0),         # flags
165
157
                self.name, self.type,
166
158
                self.domain, self.host,
173
165
# End of Avahi example code
174
166
 
175
167
 
176
 
def _datetime_to_dbus(dt, variant_level=0):
177
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
178
 
    return dbus.String(dt.isoformat(), variant_level=variant_level)
179
 
 
180
 
 
181
 
class Client(dbus.service.Object):
 
168
class Client(object):
182
169
    """A representation of a client host served by this server.
183
170
    Attributes:
184
 
    name:       string; from the config file, used in log messages and
185
 
                        D-Bus identifiers
 
171
    name:      string; from the config file, used in log messages
186
172
    fingerprint: string (40 or 32 hexadecimal digits); used to
187
173
                 uniquely identify the client
188
 
    secret:     bytestring; sent verbatim (over TLS) to client
189
 
    host:       string; available for use by the checker command
190
 
    created:    datetime.datetime(); (UTC) object creation
191
 
    last_enabled: datetime.datetime(); (UTC)
192
 
    enabled:    bool()
193
 
    last_checked_ok: datetime.datetime(); (UTC) or None
194
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
195
 
                                      until this client is invalid
196
 
    interval:   datetime.timedelta(); How often to start a new checker
197
 
    disable_hook:  If set, called by disable() as disable_hook(self)
198
 
    checker:    subprocess.Popen(); a running checker process used
199
 
                                    to see if the client lives.
200
 
                                    'None' if no process is running.
 
174
    secret:    bytestring; sent verbatim (over TLS) to client
 
175
    host:      string; available for use by the checker command
 
176
    created:   datetime.datetime(); object creation, not client host
 
177
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
178
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
179
                                     until this client is invalid
 
180
    interval:  datetime.timedelta(); How often to start a new checker
 
181
    stop_hook: If set, called by stop() as stop_hook(self)
 
182
    checker:   subprocess.Popen(); a running checker process used
 
183
                                   to see if the client lives.
 
184
                                   'None' if no process is running.
201
185
    checker_initiator_tag: a gobject event source tag, or None
202
 
    disable_initiator_tag:    - '' -
 
186
    stop_initiator_tag:    - '' -
203
187
    checker_callback_tag:  - '' -
204
188
    checker_command: string; External command which is run to check if
205
189
                     client lives.  %() expansions are done at
206
190
                     runtime with vars(self) as dict, so that for
207
191
                     instance %(name)s can be used in the command.
208
 
    use_dbus: bool(); Whether to provide D-Bus interface and signals
209
 
    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: - '' -
210
197
    """
211
 
    def timeout_milliseconds(self):
212
 
        "Return the 'timeout' attribute in milliseconds"
213
 
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
214
 
                + (self.timeout.seconds * 1000)
215
 
                + (self.timeout.microseconds // 1000))
216
 
    
217
 
    def interval_milliseconds(self):
218
 
        "Return the 'interval' attribute in milliseconds"
219
 
        return ((self.interval.days * 24 * 60 * 60 * 1000)
220
 
                + (self.interval.seconds * 1000)
221
 
                + (self.interval.microseconds // 1000))
222
 
    
223
 
    def __init__(self, name = None, disable_hook=None, config=None,
224
 
                 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={}):
225
222
        """Note: the 'checker' key in 'config' sets the
226
223
        'checker_command' attribute and *not* the 'checker'
227
224
        attribute."""
228
225
        self.name = name
229
 
        if config is None:
230
 
            config = {}
231
226
        logger.debug(u"Creating client %r", self.name)
232
 
        self.use_dbus = False   # During __init__
233
227
        # Uppercase and remove spaces from fingerprint for later
234
228
        # comparison purposes with return value from the fingerprint()
235
229
        # function
236
 
        self.fingerprint = (config["fingerprint"].upper()
237
 
                            .replace(u" ", u""))
 
230
        self.fingerprint = config["fingerprint"].upper()\
 
231
                           .replace(u" ", u"")
238
232
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
239
233
        if "secret" in config:
240
234
            self.secret = config["secret"].decode(u"base64")
241
235
        elif "secfile" in config:
242
 
            with closing(open(os.path.expanduser
243
 
                              (os.path.expandvars
244
 
                               (config["secfile"])))) as secfile:
245
 
                self.secret = secfile.read()
 
236
            sf = open(config["secfile"])
 
237
            self.secret = sf.read()
 
238
            sf.close()
246
239
        else:
247
240
            raise TypeError(u"No secret or secfile for client %s"
248
241
                            % self.name)
249
242
        self.host = config.get("host", "")
250
 
        self.created = datetime.datetime.utcnow()
251
 
        self.enabled = False
252
 
        self.last_enabled = None
 
243
        self.created = datetime.datetime.now()
253
244
        self.last_checked_ok = None
254
245
        self.timeout = string_to_delta(config["timeout"])
255
246
        self.interval = string_to_delta(config["interval"])
256
 
        self.disable_hook = disable_hook
 
247
        self.stop_hook = stop_hook
257
248
        self.checker = None
258
249
        self.checker_initiator_tag = None
259
 
        self.disable_initiator_tag = None
 
250
        self.stop_initiator_tag = None
260
251
        self.checker_callback_tag = None
261
 
        self.checker_command = config["checker"]
262
 
        self.last_connect = None
263
 
        # Only now, when this client is initialized, can it show up on
264
 
        # the D-Bus
265
 
        self.use_dbus = use_dbus
266
 
        if self.use_dbus:
267
 
            self.dbus_object_path = (dbus.ObjectPath
268
 
                                     ("/clients/"
269
 
                                      + self.name.replace(".", "_")))
270
 
            dbus.service.Object.__init__(self, bus,
271
 
                                         self.dbus_object_path)
272
 
    
273
 
    def enable(self):
 
252
        self.check_command = config["checker"]
 
253
    def start(self):
274
254
        """Start this client's checker and timeout hooks"""
275
 
        self.last_enabled = datetime.datetime.utcnow()
276
255
        # Schedule a new checker to be started an 'interval' from now,
277
256
        # and every interval from then on.
278
 
        self.checker_initiator_tag = (gobject.timeout_add
279
 
                                      (self.interval_milliseconds(),
280
 
                                       self.start_checker))
 
257
        self.checker_initiator_tag = gobject.timeout_add\
 
258
                                     (self._interval_milliseconds,
 
259
                                      self.start_checker)
281
260
        # Also start a new checker *right now*.
282
261
        self.start_checker()
283
 
        # Schedule a disable() when 'timeout' has passed
284
 
        self.disable_initiator_tag = (gobject.timeout_add
285
 
                                   (self.timeout_milliseconds(),
286
 
                                    self.disable))
287
 
        self.enabled = True
288
 
        if self.use_dbus:
289
 
            # Emit D-Bus signals
290
 
            self.PropertyChanged(dbus.String(u"enabled"),
291
 
                                 dbus.Boolean(True, variant_level=1))
292
 
            self.PropertyChanged(dbus.String(u"last_enabled"),
293
 
                                 (_datetime_to_dbus(self.last_enabled,
294
 
                                                    variant_level=1)))
295
 
    
296
 
    def disable(self):
297
 
        """Disable this client."""
298
 
        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:
299
275
            return False
300
 
        logger.info(u"Disabling client %s", self.name)
301
 
        if getattr(self, "disable_initiator_tag", False):
302
 
            gobject.source_remove(self.disable_initiator_tag)
303
 
            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
304
279
        if getattr(self, "checker_initiator_tag", False):
305
280
            gobject.source_remove(self.checker_initiator_tag)
306
281
            self.checker_initiator_tag = None
307
282
        self.stop_checker()
308
 
        if self.disable_hook:
309
 
            self.disable_hook(self)
310
 
        self.enabled = False
311
 
        if self.use_dbus:
312
 
            # Emit D-Bus signal
313
 
            self.PropertyChanged(dbus.String(u"enabled"),
314
 
                                 dbus.Boolean(False, variant_level=1))
 
283
        if self.stop_hook:
 
284
            self.stop_hook(self)
315
285
        # Do not run this again if called by a gobject.timeout_add
316
286
        return False
317
 
    
318
287
    def __del__(self):
319
 
        self.disable_hook = None
320
 
        self.disable()
321
 
    
322
 
    def checker_callback(self, pid, condition, command):
 
288
        self.stop_hook = None
 
289
        self.stop()
 
290
    def checker_callback(self, pid, condition):
323
291
        """The checker has completed, so take appropriate actions."""
 
292
        now = datetime.datetime.now()
324
293
        self.checker_callback_tag = None
325
294
        self.checker = None
326
 
        if self.use_dbus:
327
 
            # Emit D-Bus signal
328
 
            self.PropertyChanged(dbus.String(u"checker_running"),
329
 
                                 dbus.Boolean(False, variant_level=1))
330
 
        if os.WIFEXITED(condition):
331
 
            exitstatus = os.WEXITSTATUS(condition)
332
 
            if exitstatus == 0:
333
 
                logger.info(u"Checker for %(name)s succeeded",
334
 
                            vars(self))
335
 
                self.checked_ok()
336
 
            else:
337
 
                logger.info(u"Checker for %(name)s failed",
338
 
                            vars(self))
339
 
            if self.use_dbus:
340
 
                # Emit D-Bus signal
341
 
                self.CheckerCompleted(dbus.Int16(exitstatus),
342
 
                                      dbus.Int64(condition),
343
 
                                      dbus.String(command))
344
 
        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):
345
305
            logger.warning(u"Checker for %(name)s crashed?",
346
306
                           vars(self))
347
 
            if self.use_dbus:
348
 
                # Emit D-Bus signal
349
 
                self.CheckerCompleted(dbus.Int16(-1),
350
 
                                      dbus.Int64(condition),
351
 
                                      dbus.String(command))
352
 
    
353
 
    def checked_ok(self):
354
 
        """Bump up the timeout for this client.
355
 
        This should only be called when the client has been seen,
356
 
        alive and well.
357
 
        """
358
 
        self.last_checked_ok = datetime.datetime.utcnow()
359
 
        gobject.source_remove(self.disable_initiator_tag)
360
 
        self.disable_initiator_tag = (gobject.timeout_add
361
 
                                      (self.timeout_milliseconds(),
362
 
                                       self.disable))
363
 
        if self.use_dbus:
364
 
            # Emit D-Bus signal
365
 
            self.PropertyChanged(
366
 
                dbus.String(u"last_checked_ok"),
367
 
                (_datetime_to_dbus(self.last_checked_ok,
368
 
                                   variant_level=1)))
369
 
    
 
307
        else:
 
308
            logger.info(u"Checker for %(name)s failed",
 
309
                        vars(self))
370
310
    def start_checker(self):
371
311
        """Start a new checker subprocess if one is not running.
372
312
        If a checker already exists, leave it running and do
381
321
        # is as it should be.
382
322
        if self.checker is None:
383
323
            try:
384
 
                # In case checker_command has exactly one % operator
385
 
                command = self.checker_command % self.host
 
324
                # In case check_command has exactly one % operator
 
325
                command = self.check_command % self.host
386
326
            except TypeError:
387
327
                # Escape attributes for the shell
388
328
                escaped_attrs = dict((key, re.escape(str(val)))
389
329
                                     for key, val in
390
330
                                     vars(self).iteritems())
391
331
                try:
392
 
                    command = self.checker_command % escaped_attrs
 
332
                    command = self.check_command % escaped_attrs
393
333
                except TypeError, error:
394
334
                    logger.error(u'Could not format string "%s":'
395
 
                                 u' %s', self.checker_command, error)
 
335
                                 u' %s', self.check_command, error)
396
336
                    return True # Try again later
397
337
            try:
398
338
                logger.info(u"Starting checker %r for %s",
399
339
                            command, self.name)
400
 
                # We don't need to redirect stdout and stderr, since
401
 
                # in normal mode, that is already done by daemon(),
402
 
                # and in debug mode we don't want to.  (Stdin is
403
 
                # always replaced by /dev/null.)
404
340
                self.checker = subprocess.Popen(command,
405
341
                                                close_fds=True,
406
342
                                                shell=True, cwd="/")
407
 
                if self.use_dbus:
408
 
                    # Emit D-Bus signal
409
 
                    self.CheckerStarted(command)
410
 
                    self.PropertyChanged(
411
 
                        dbus.String("checker_running"),
412
 
                        dbus.Boolean(True, variant_level=1))
413
 
                self.checker_callback_tag = (gobject.child_watch_add
414
 
                                             (self.checker.pid,
415
 
                                              self.checker_callback,
416
 
                                              data=command))
417
 
                # The checker may have completed before the gobject
418
 
                # watch was added.  Check for this.
419
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
420
 
                if pid:
421
 
                    gobject.source_remove(self.checker_callback_tag)
422
 
                    self.checker_callback(pid, status, command)
423
 
            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:
424
347
                logger.error(u"Failed to start subprocess: %s",
425
348
                             error)
426
349
        # Re-run this periodically if run by gobject.timeout_add
427
350
        return True
428
 
    
429
351
    def stop_checker(self):
430
352
        """Force the checker process, if any, to stop."""
431
353
        if self.checker_callback_tag:
443
365
            if error.errno != errno.ESRCH: # No such process
444
366
                raise
445
367
        self.checker = None
446
 
        if self.use_dbus:
447
 
            self.PropertyChanged(dbus.String(u"checker_running"),
448
 
                                 dbus.Boolean(False, variant_level=1))
449
 
    
450
368
    def still_valid(self):
451
369
        """Has the timeout not yet passed for this client?"""
452
 
        if not getattr(self, "enabled", False):
453
 
            return False
454
 
        now = datetime.datetime.utcnow()
 
370
        now = datetime.datetime.now()
455
371
        if self.last_checked_ok is None:
456
372
            return now < (self.created + self.timeout)
457
373
        else:
458
374
            return now < (self.last_checked_ok + self.timeout)
459
 
    
460
 
    ## D-Bus methods & signals
461
 
    _interface = u"se.bsnet.fukt.Mandos.Client"
462
 
    
463
 
    # CheckedOK - method
464
 
    CheckedOK = dbus.service.method(_interface)(checked_ok)
465
 
    CheckedOK.__name__ = "CheckedOK"
466
 
    
467
 
    # CheckerCompleted - signal
468
 
    @dbus.service.signal(_interface, signature="nxs")
469
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
470
 
        "D-Bus signal"
471
 
        pass
472
 
    
473
 
    # CheckerStarted - signal
474
 
    @dbus.service.signal(_interface, signature="s")
475
 
    def CheckerStarted(self, command):
476
 
        "D-Bus signal"
477
 
        pass
478
 
    
479
 
    # GetAllProperties - method
480
 
    @dbus.service.method(_interface, out_signature="a{sv}")
481
 
    def GetAllProperties(self):
482
 
        "D-Bus method"
483
 
        return dbus.Dictionary({
484
 
                dbus.String("name"):
485
 
                    dbus.String(self.name, variant_level=1),
486
 
                dbus.String("fingerprint"):
487
 
                    dbus.String(self.fingerprint, variant_level=1),
488
 
                dbus.String("host"):
489
 
                    dbus.String(self.host, variant_level=1),
490
 
                dbus.String("created"):
491
 
                    _datetime_to_dbus(self.created, variant_level=1),
492
 
                dbus.String("last_enabled"):
493
 
                    (_datetime_to_dbus(self.last_enabled,
494
 
                                       variant_level=1)
495
 
                     if self.last_enabled is not None
496
 
                     else dbus.Boolean(False, variant_level=1)),
497
 
                dbus.String("enabled"):
498
 
                    dbus.Boolean(self.enabled, variant_level=1),
499
 
                dbus.String("last_checked_ok"):
500
 
                    (_datetime_to_dbus(self.last_checked_ok,
501
 
                                       variant_level=1)
502
 
                     if self.last_checked_ok is not None
503
 
                     else dbus.Boolean (False, variant_level=1)),
504
 
                dbus.String("timeout"):
505
 
                    dbus.UInt64(self.timeout_milliseconds(),
506
 
                                variant_level=1),
507
 
                dbus.String("interval"):
508
 
                    dbus.UInt64(self.interval_milliseconds(),
509
 
                                variant_level=1),
510
 
                dbus.String("checker"):
511
 
                    dbus.String(self.checker_command,
512
 
                                variant_level=1),
513
 
                dbus.String("checker_running"):
514
 
                    dbus.Boolean(self.checker is not None,
515
 
                                 variant_level=1),
516
 
                dbus.String("object_path"):
517
 
                    dbus.ObjectPath(self.dbus_object_path,
518
 
                                    variant_level=1)
519
 
                }, signature="sv")
520
 
    
521
 
    # IsStillValid - method
522
 
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
523
 
                    (still_valid))
524
 
    IsStillValid.__name__ = "IsStillValid"
525
 
    
526
 
    # PropertyChanged - signal
527
 
    @dbus.service.signal(_interface, signature="sv")
528
 
    def PropertyChanged(self, property, value):
529
 
        "D-Bus signal"
530
 
        pass
531
 
    
532
 
    # SetChecker - method
533
 
    @dbus.service.method(_interface, in_signature="s")
534
 
    def SetChecker(self, checker):
535
 
        "D-Bus setter method"
536
 
        self.checker_command = checker
537
 
        # Emit D-Bus signal
538
 
        self.PropertyChanged(dbus.String(u"checker"),
539
 
                             dbus.String(self.checker_command,
540
 
                                         variant_level=1))
541
 
    
542
 
    # SetHost - method
543
 
    @dbus.service.method(_interface, in_signature="s")
544
 
    def SetHost(self, host):
545
 
        "D-Bus setter method"
546
 
        self.host = host
547
 
        # Emit D-Bus signal
548
 
        self.PropertyChanged(dbus.String(u"host"),
549
 
                             dbus.String(self.host, variant_level=1))
550
 
    
551
 
    # SetInterval - method
552
 
    @dbus.service.method(_interface, in_signature="t")
553
 
    def SetInterval(self, milliseconds):
554
 
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
555
 
        # Emit D-Bus signal
556
 
        self.PropertyChanged(dbus.String(u"interval"),
557
 
                             (dbus.UInt64(self.interval_milliseconds(),
558
 
                                          variant_level=1)))
559
 
    
560
 
    # SetSecret - method
561
 
    @dbus.service.method(_interface, in_signature="ay",
562
 
                         byte_arrays=True)
563
 
    def SetSecret(self, secret):
564
 
        "D-Bus setter method"
565
 
        self.secret = str(secret)
566
 
    
567
 
    # SetTimeout - method
568
 
    @dbus.service.method(_interface, in_signature="t")
569
 
    def SetTimeout(self, milliseconds):
570
 
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
571
 
        # Emit D-Bus signal
572
 
        self.PropertyChanged(dbus.String(u"timeout"),
573
 
                             (dbus.UInt64(self.timeout_milliseconds(),
574
 
                                          variant_level=1)))
575
 
    
576
 
    # Enable - method
577
 
    Enable = dbus.service.method(_interface)(enable)
578
 
    Enable.__name__ = "Enable"
579
 
    
580
 
    # StartChecker - method
581
 
    @dbus.service.method(_interface)
582
 
    def StartChecker(self):
583
 
        "D-Bus method"
584
 
        self.start_checker()
585
 
    
586
 
    # Disable - method
587
 
    @dbus.service.method(_interface)
588
 
    def Disable(self):
589
 
        "D-Bus method"
590
 
        self.disable()
591
 
    
592
 
    # StopChecker - method
593
 
    StopChecker = dbus.service.method(_interface)(stop_checker)
594
 
    StopChecker.__name__ = "StopChecker"
595
 
    
596
 
    del _interface
597
375
 
598
376
 
599
377
def peer_certificate(session):
600
378
    "Return the peer's OpenPGP certificate as a bytestring"
601
379
    # If not an OpenPGP certificate...
602
 
    if (gnutls.library.functions
603
 
        .gnutls_certificate_type_get(session._c_object)
604
 
        != 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:
605
383
        # ...do the normal thing
606
384
        return session.peer_certificate
607
 
    list_size = ctypes.c_uint(1)
608
 
    cert_list = (gnutls.library.functions
609
 
                 .gnutls_certificate_get_peers
610
 
                 (session._c_object, ctypes.byref(list_size)))
611
 
    if not bool(cert_list) and list_size.value != 0:
612
 
        raise gnutls.errors.GNUTLSError("error getting peer"
613
 
                                        " 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))
614
388
    if list_size.value == 0:
615
389
        return None
616
390
    cert = cert_list[0]
620
394
def fingerprint(openpgp):
621
395
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
622
396
    # New GnuTLS "datum" with the OpenPGP public key
623
 
    datum = (gnutls.library.types
624
 
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
625
 
                                         ctypes.POINTER
626
 
                                         (ctypes.c_ubyte)),
627
 
                             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)))
628
401
    # New empty GnuTLS certificate
629
402
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
630
 
    (gnutls.library.functions
631
 
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
403
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
404
        (ctypes.byref(crt))
632
405
    # Import the OpenPGP public key into the certificate
633
 
    (gnutls.library.functions
634
 
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
635
 
                                gnutls.library.constants
636
 
                                .GNUTLS_OPENPGP_FMT_RAW))
637
 
    # Verify the self signature in the key
638
 
    crtverify = ctypes.c_uint()
639
 
    (gnutls.library.functions
640
 
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
641
 
    if crtverify.value != 0:
642
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
643
 
        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)
644
409
    # New buffer for the fingerprint
645
 
    buf = ctypes.create_string_buffer(20)
646
 
    buf_len = ctypes.c_size_t()
 
410
    buffer = ctypes.create_string_buffer(20)
 
411
    buffer_length = ctypes.c_size_t()
647
412
    # Get the fingerprint from the certificate into the buffer
648
 
    (gnutls.library.functions
649
 
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
650
 
                                         ctypes.byref(buf_len)))
 
413
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
414
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
651
415
    # Deinit the certificate
652
416
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
653
417
    # Convert the buffer to a Python bytestring
654
 
    fpr = ctypes.string_at(buf, buf_len.value)
 
418
    fpr = ctypes.string_at(buffer, buffer_length.value)
655
419
    # Convert the bytestring to hexadecimal notation
656
420
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
657
421
    return hex_fpr
658
422
 
659
423
 
660
 
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
424
class tcp_handler(SocketServer.BaseRequestHandler, object):
661
425
    """A TCP request handler class.
662
426
    Instantiated by IPv6_TCPServer for each request to handle it.
663
427
    Note: This will run in its own forked process."""
664
428
    
665
429
    def handle(self):
666
430
        logger.info(u"TCP connection from: %s",
667
 
                    unicode(self.client_address))
668
 
        session = (gnutls.connection
669
 
                   .ClientSession(self.request,
670
 
                                  gnutls.connection
671
 
                                  .X509Credentials()))
 
431
                     unicode(self.client_address))
 
432
        session = gnutls.connection.ClientSession\
 
433
                  (self.request, gnutls.connection.X509Credentials())
672
434
        
673
435
        line = self.request.makefile().readline()
674
436
        logger.debug(u"Protocol version: %r", line)
685
447
        # using OpenPGP certificates.
686
448
        
687
449
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
688
 
        #                     "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
689
 
        #                     "+DHE-DSS"))
690
 
        # Use a fallback default, since this MUST be set.
691
 
        priority = self.server.settings.get("priority", "NORMAL")
692
 
        (gnutls.library.functions
693
 
         .gnutls_priority_set_direct(session._c_object,
694
 
                                     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);
695
458
        
696
459
        try:
697
460
            session.handshake()
700
463
            # Do not run session.bye() here: the session is not
701
464
            # established.  Just abandon the request.
702
465
            return
703
 
        logger.debug(u"Handshake succeeded")
704
466
        try:
705
467
            fpr = fingerprint(peer_certificate(session))
706
468
        except (TypeError, gnutls.errors.GNUTLSError), error:
708
470
            session.bye()
709
471
            return
710
472
        logger.debug(u"Fingerprint: %s", fpr)
711
 
        
 
473
        client = None
712
474
        for c in self.server.clients:
713
475
            if c.fingerprint == fpr:
714
476
                client = c
715
477
                break
716
 
        else:
 
478
        if not client:
717
479
            logger.warning(u"Client not found for fingerprint: %s",
718
480
                           fpr)
719
481
            session.bye()
726
488
                           vars(client))
727
489
            session.bye()
728
490
            return
729
 
        ## This won't work here, since we're in a fork.
730
 
        # client.checked_ok()
731
491
        sent_size = 0
732
492
        while sent_size < len(client.secret):
733
493
            sent = session.send(client.secret[sent_size:])
738
498
        session.bye()
739
499
 
740
500
 
741
 
class IPv6_TCPServer(SocketServer.ForkingMixIn,
742
 
                     SocketServer.TCPServer, object):
743
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port.
 
501
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
502
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
744
503
    Attributes:
745
504
        settings:       Server settings
746
505
        clients:        Set() of Client objects
747
 
        enabled:        Boolean; whether this server is activated yet
748
506
    """
749
507
    address_family = socket.AF_INET6
750
508
    def __init__(self, *args, **kwargs):
754
512
        if "clients" in kwargs:
755
513
            self.clients = kwargs["clients"]
756
514
            del kwargs["clients"]
757
 
        if "use_ipv6" in kwargs:
758
 
            if not kwargs["use_ipv6"]:
759
 
                self.address_family = socket.AF_INET
760
 
            del kwargs["use_ipv6"]
761
 
        self.enabled = False
762
 
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
 
515
        return super(type(self), self).__init__(*args, **kwargs)
763
516
    def server_bind(self):
764
517
        """This overrides the normal server_bind() function
765
518
        to bind to an interface if one was specified, and also NOT to
777
530
                                 u" bind to interface %s",
778
531
                                 self.settings["interface"])
779
532
                else:
780
 
                    raise
 
533
                    raise error
781
534
        # Only bind(2) the socket if we really need to.
782
535
        if self.server_address[0] or self.server_address[1]:
783
536
            if not self.server_address[0]:
784
 
                if self.address_family == socket.AF_INET6:
785
 
                    any_address = "::" # in6addr_any
786
 
                else:
787
 
                    any_address = socket.INADDR_ANY
788
 
                self.server_address = (any_address,
 
537
                in6addr_any = "::"
 
538
                self.server_address = (in6addr_any,
789
539
                                       self.server_address[1])
790
540
            elif not self.server_address[1]:
791
541
                self.server_address = (self.server_address[0],
797
547
#                                            if_nametoindex
798
548
#                                            (self.settings
799
549
#                                             ["interface"]))
800
 
            return super(IPv6_TCPServer, self).server_bind()
801
 
    def server_activate(self):
802
 
        if self.enabled:
803
 
            return super(IPv6_TCPServer, self).server_activate()
804
 
    def enable(self):
805
 
        self.enabled = True
 
550
            return super(type(self), self).server_bind()
806
551
 
807
552
 
808
553
def string_to_delta(interval):
809
554
    """Parse a string and return a datetime.timedelta
810
 
    
 
555
 
811
556
    >>> string_to_delta('7d')
812
557
    datetime.timedelta(7)
813
558
    >>> string_to_delta('60s')
818
563
    datetime.timedelta(1)
819
564
    >>> string_to_delta(u'1w')
820
565
    datetime.timedelta(7)
821
 
    >>> string_to_delta('5m 30s')
822
 
    datetime.timedelta(0, 330)
823
566
    """
824
 
    timevalue = datetime.timedelta(0)
825
 
    for s in interval.split():
826
 
        try:
827
 
            suffix = unicode(s[-1])
828
 
            value = int(s[:-1])
829
 
            if suffix == u"d":
830
 
                delta = datetime.timedelta(value)
831
 
            elif suffix == u"s":
832
 
                delta = datetime.timedelta(0, value)
833
 
            elif suffix == u"m":
834
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
835
 
            elif suffix == u"h":
836
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
837
 
            elif suffix == u"w":
838
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
839
 
            else:
840
 
                raise ValueError
841
 
        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:
842
581
            raise ValueError
843
 
        timevalue += delta
844
 
    return timevalue
 
582
    except (ValueError, IndexError):
 
583
        raise ValueError
 
584
    return delta
845
585
 
846
586
 
847
587
def server_state_changed(state):
848
588
    """Derived from the Avahi example code"""
849
589
    if state == avahi.SERVER_COLLISION:
850
 
        logger.error(u"Zeroconf server name collision")
 
590
        logger.error(u"Server name collision")
851
591
        service.remove()
852
592
    elif state == avahi.SERVER_RUNNING:
853
593
        service.add()
855
595
 
856
596
def entry_group_state_changed(state, error):
857
597
    """Derived from the Avahi example code"""
858
 
    logger.debug(u"Avahi state change: %i", state)
 
598
    logger.debug(u"state change: %i", state)
859
599
    
860
600
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
861
 
        logger.debug(u"Zeroconf service established.")
 
601
        logger.debug(u"Service established.")
862
602
    elif state == avahi.ENTRY_GROUP_COLLISION:
863
 
        logger.warning(u"Zeroconf service name collision.")
 
603
        logger.warning(u"Service name collision.")
864
604
        service.rename()
865
605
    elif state == avahi.ENTRY_GROUP_FAILURE:
866
 
        logger.critical(u"Avahi: Error in group state changed %s",
 
606
        logger.critical(u"Error in group state changed %s",
867
607
                        unicode(error))
868
 
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
 
608
        raise AvahiGroupError("State changed: %s", str(error))
869
609
 
870
610
def if_nametoindex(interface):
871
611
    """Call the C function if_nametoindex(), or equivalent"""
872
612
    global if_nametoindex
873
613
    try:
874
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
875
 
                          (ctypes.util.find_library("c"))
876
 
                          .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
877
618
    except (OSError, AttributeError):
878
619
        if "struct" not in sys.modules:
879
620
            import struct
882
623
        def if_nametoindex(interface):
883
624
            "Get an interface index the hard way, i.e. using fcntl()"
884
625
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
885
 
            with closing(socket.socket()) as s:
886
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
887
 
                                    struct.pack("16s16x", interface))
 
626
            s = socket.socket()
 
627
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
628
                                struct.pack("16s16x", interface))
 
629
            s.close()
888
630
            interface_index = struct.unpack("I", ifreq[16:20])[0]
889
631
            return interface_index
890
632
    return if_nametoindex(interface)
914
656
 
915
657
 
916
658
def main():
917
 
    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)
918
663
    parser.add_option("-i", "--interface", type="string",
919
664
                      metavar="IF", help="Bind to interface IF")
920
665
    parser.add_option("-a", "--address", type="string",
921
666
                      help="Address to listen for requests on")
922
667
    parser.add_option("-p", "--port", type="int",
923
668
                      help="Port number to receive requests on")
924
 
    parser.add_option("--check", action="store_true",
 
669
    parser.add_option("--check", action="store_true", default=False,
925
670
                      help="Run self-test")
926
671
    parser.add_option("--debug", action="store_true",
927
672
                      help="Debug mode; run in foreground and log to"
934
679
                      default="/etc/mandos", metavar="DIR",
935
680
                      help="Directory to search for configuration"
936
681
                      " files")
937
 
    parser.add_option("--no-dbus", action="store_false",
938
 
                      dest="use_dbus",
939
 
                      help="Do not provide D-Bus system bus"
940
 
                      " interface")
941
 
    parser.add_option("--no-ipv6", action="store_false",
942
 
                      dest="use_ipv6", help="Do not use IPv6")
943
 
    options = parser.parse_args()[0]
 
682
    (options, args) = parser.parse_args()
944
683
    
945
684
    if options.check:
946
685
        import doctest
955
694
                        "priority":
956
695
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
957
696
                        "servicename": "Mandos",
958
 
                        "use_dbus": "True",
959
 
                        "use_ipv6": "True",
960
697
                        }
961
698
    
962
699
    # Parse config file for server-global settings
963
700
    server_config = ConfigParser.SafeConfigParser(server_defaults)
964
701
    del server_defaults
965
702
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
703
    server_section = "server"
966
704
    # Convert the SafeConfigParser object to a dict
967
 
    server_settings = server_config.defaults()
968
 
    # Use the appropriate methods on the non-string config options
969
 
    server_settings["debug"] = server_config.getboolean("DEFAULT",
970
 
                                                        "debug")
971
 
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
972
 
                                                           "use_dbus")
973
 
    server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
974
 
                                                           "use_ipv6")
975
 
    if server_settings["port"]:
976
 
        server_settings["port"] = server_config.getint("DEFAULT",
977
 
                                                       "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")
978
709
    del server_config
979
710
    
980
711
    # Override the settings from the config file with command line
981
712
    # options, if set.
982
713
    for option in ("interface", "address", "port", "debug",
983
 
                   "priority", "servicename", "configdir",
984
 
                   "use_dbus", "use_ipv6"):
 
714
                   "priority", "servicename", "configdir"):
985
715
        value = getattr(options, option)
986
716
        if value is not None:
987
717
            server_settings[option] = value
988
718
    del options
989
719
    # Now we have our good server settings in "server_settings"
990
720
    
991
 
    # For convenience
992
721
    debug = server_settings["debug"]
993
 
    use_dbus = server_settings["use_dbus"]
994
 
    use_ipv6 = server_settings["use_ipv6"]
995
722
    
996
723
    if not debug:
997
724
        syslogger.setLevel(logging.WARNING)
998
725
        console.setLevel(logging.WARNING)
999
726
    
1000
727
    if server_settings["servicename"] != "Mandos":
1001
 
        syslogger.setFormatter(logging.Formatter
 
728
        syslogger.setFormatter(logging.Formatter\
1002
729
                               ('Mandos (%s): %%(levelname)s:'
1003
730
                                ' %%(message)s'
1004
731
                                % server_settings["servicename"]))
1007
734
    client_defaults = { "timeout": "1h",
1008
735
                        "interval": "5m",
1009
736
                        "checker": "fping -q -- %%(host)s",
1010
 
                        "host": "",
1011
737
                        }
1012
738
    client_config = ConfigParser.SafeConfigParser(client_defaults)
1013
739
    client_config.read(os.path.join(server_settings["configdir"],
1014
740
                                    "clients.conf"))
1015
741
    
1016
 
    clients = Set()
1017
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
1018
 
                                 server_settings["port"]),
1019
 
                                TCP_handler,
1020
 
                                settings=server_settings,
1021
 
                                clients=clients, use_ipv6=use_ipv6)
1022
 
    pidfilename = "/var/run/mandos.pid"
1023
 
    try:
1024
 
        pidfile = open(pidfilename, "w")
1025
 
    except IOError:
1026
 
        logger.error("Could not open file %r", pidfilename)
1027
 
    
1028
 
    try:
1029
 
        uid = pwd.getpwnam("_mandos").pw_uid
1030
 
        gid = pwd.getpwnam("_mandos").pw_gid
1031
 
    except KeyError:
1032
 
        try:
1033
 
            uid = pwd.getpwnam("mandos").pw_uid
1034
 
            gid = pwd.getpwnam("mandos").pw_gid
1035
 
        except KeyError:
1036
 
            try:
1037
 
                uid = pwd.getpwnam("nobody").pw_uid
1038
 
                gid = pwd.getpwnam("nogroup").pw_gid
1039
 
            except KeyError:
1040
 
                uid = 65534
1041
 
                gid = 65534
1042
 
    try:
1043
 
        os.setgid(gid)
1044
 
        os.setuid(uid)
1045
 
    except OSError, error:
1046
 
        if error[0] != errno.EPERM:
1047
 
            raise error
1048
 
    
1049
 
    # Enable all possible GnuTLS debugging
1050
 
    if debug:
1051
 
        # "Use a log level over 10 to enable all debugging options."
1052
 
        # - GnuTLS manual
1053
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1054
 
        
1055
 
        @gnutls.library.types.gnutls_log_func
1056
 
        def debug_gnutls(level, string):
1057
 
            logger.debug("GnuTLS: %s", string[:-1])
1058
 
        
1059
 
        (gnutls.library.functions
1060
 
         .gnutls_global_set_log_function(debug_gnutls))
1061
 
    
1062
742
    global service
1063
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1064
743
    service = AvahiService(name = server_settings["servicename"],
1065
 
                           servicetype = "_mandos._tcp",
1066
 
                           protocol = protocol)
 
744
                           type = "_mandos._tcp", );
1067
745
    if server_settings["interface"]:
1068
 
        service.interface = (if_nametoindex
1069
 
                             (server_settings["interface"]))
 
746
        service.interface = if_nametoindex(server_settings["interface"])
1070
747
    
1071
748
    global main_loop
1072
749
    global bus
1075
752
    DBusGMainLoop(set_as_default=True )
1076
753
    main_loop = gobject.MainLoop()
1077
754
    bus = dbus.SystemBus()
1078
 
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1079
 
                                           avahi.DBUS_PATH_SERVER),
1080
 
                            avahi.DBUS_INTERFACE_SERVER)
 
755
    server = dbus.Interface(
 
756
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
757
            avahi.DBUS_INTERFACE_SERVER )
1081
758
    # End of Avahi example code
1082
 
    if use_dbus:
1083
 
        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()
1084
766
    
1085
767
    clients.update(Set(Client(name = section,
 
768
                              stop_hook = remove_from_clients,
1086
769
                              config
1087
 
                              = dict(client_config.items(section)),
1088
 
                              use_dbus = use_dbus)
 
770
                              = dict(client_config.items(section)))
1089
771
                       for section in client_config.sections()))
1090
772
    if not clients:
1091
 
        logger.warning(u"No clients defined")
 
773
        logger.critical(u"No clients defined")
 
774
        sys.exit(1)
1092
775
    
1093
 
    if debug:
1094
 
        # Redirect stdin so all checkers get /dev/null
1095
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1096
 
        os.dup2(null, sys.stdin.fileno())
1097
 
        if null > 2:
1098
 
            os.close(null)
1099
 
    else:
1100
 
        # No console logging
 
776
    if not debug:
1101
777
        logger.removeHandler(console)
1102
 
        # Close all input and output, do double fork, etc.
1103
778
        daemon()
1104
779
    
 
780
    pidfilename = "/var/run/mandos/mandos.pid"
 
781
    pid = os.getpid()
1105
782
    try:
1106
 
        pid = os.getpid()
 
783
        pidfile = open(pidfilename, "w")
1107
784
        pidfile.write(str(pid) + "\n")
1108
785
        pidfile.close()
1109
786
        del pidfile
1110
 
    except IOError:
1111
 
        logger.error(u"Could not write to file %r with PID %d",
1112
 
                     pidfilename, pid)
1113
 
    except NameError:
1114
 
        # "pidfile" was never created
1115
 
        pass
1116
 
    del pidfilename
 
787
    except IOError, err:
 
788
        logger.error(u"Could not write %s file with PID %d",
 
789
                     pidfilename, os.getpid())
1117
790
    
1118
791
    def cleanup():
1119
792
        "Cleanup function; run on exit"
1126
799
        
1127
800
        while clients:
1128
801
            client = clients.pop()
1129
 
            client.disable_hook = None
1130
 
            client.disable()
 
802
            client.stop_hook = None
 
803
            client.stop()
1131
804
    
1132
805
    atexit.register(cleanup)
1133
806
    
1136
809
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1137
810
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1138
811
    
1139
 
    if use_dbus:
1140
 
        class MandosServer(dbus.service.Object):
1141
 
            """A D-Bus proxy object"""
1142
 
            def __init__(self):
1143
 
                dbus.service.Object.__init__(self, bus, "/")
1144
 
            _interface = u"se.bsnet.fukt.Mandos"
1145
 
            
1146
 
            @dbus.service.signal(_interface, signature="oa{sv}")
1147
 
            def ClientAdded(self, objpath, properties):
1148
 
                "D-Bus signal"
1149
 
                pass
1150
 
            
1151
 
            @dbus.service.signal(_interface, signature="os")
1152
 
            def ClientRemoved(self, objpath, name):
1153
 
                "D-Bus signal"
1154
 
                pass
1155
 
            
1156
 
            @dbus.service.method(_interface, out_signature="ao")
1157
 
            def GetAllClients(self):
1158
 
                "D-Bus method"
1159
 
                return dbus.Array(c.dbus_object_path for c in clients)
1160
 
            
1161
 
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
1162
 
            def GetAllClientsWithProperties(self):
1163
 
                "D-Bus method"
1164
 
                return dbus.Dictionary(
1165
 
                    ((c.dbus_object_path, c.GetAllProperties())
1166
 
                     for c in clients),
1167
 
                    signature="oa{sv}")
1168
 
            
1169
 
            @dbus.service.method(_interface, in_signature="o")
1170
 
            def RemoveClient(self, object_path):
1171
 
                "D-Bus method"
1172
 
                for c in clients:
1173
 
                    if c.dbus_object_path == object_path:
1174
 
                        clients.remove(c)
1175
 
                        # Don't signal anything except ClientRemoved
1176
 
                        c.use_dbus = False
1177
 
                        c.disable()
1178
 
                        # Emit D-Bus signal
1179
 
                        self.ClientRemoved(object_path, c.name)
1180
 
                        return
1181
 
                raise KeyError
1182
 
            
1183
 
            del _interface
1184
 
        
1185
 
        mandos_server = MandosServer()
1186
 
    
1187
812
    for client in clients:
1188
 
        if use_dbus:
1189
 
            # Emit D-Bus signal
1190
 
            mandos_server.ClientAdded(client.dbus_object_path,
1191
 
                                      client.GetAllProperties())
1192
 
        client.enable()
1193
 
    
1194
 
    tcp_server.enable()
1195
 
    tcp_server.server_activate()
1196
 
    
 
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)
1197
820
    # Find out what port we got
1198
821
    service.port = tcp_server.socket.getsockname()[1]
1199
 
    if use_ipv6:
1200
 
        logger.info(u"Now listening on address %r, port %d,"
1201
 
                    " flowinfo %d, scope_id %d"
1202
 
                    % tcp_server.socket.getsockname())
1203
 
    else:                       # IPv4
1204
 
        logger.info(u"Now listening on address %r, port %d"
1205
 
                    % tcp_server.socket.getsockname())
 
822
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
823
                u" scope_id %d" % tcp_server.socket.getsockname())
1206
824
    
1207
825
    #service.interface = tcp_server.socket.getsockname()[3]
1208
826
    
1218
836
        
1219
837
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1220
838
                             lambda *args, **kwargs:
1221
 
                             (tcp_server.handle_request
1222
 
                              (*args[2:], **kwargs) or True))
 
839
                             tcp_server.handle_request\
 
840
                             (*args[2:], **kwargs) or True)
1223
841
        
1224
842
        logger.debug(u"Starting main loop")
 
843
        main_loop_started = True
1225
844
        main_loop.run()
1226
845
    except AvahiError, error:
1227
 
        logger.critical(u"AvahiError: %s", error)
 
846
        logger.critical(u"AvahiError: %s" + unicode(error))
1228
847
        sys.exit(1)
1229
848
    except KeyboardInterrupt:
1230
849
        if debug:
1231
 
            print >> sys.stderr
1232
 
        logger.debug("Server received KeyboardInterrupt")
1233
 
    logger.debug("Server exiting")
 
850
            print
1234
851
 
1235
852
if __name__ == '__main__':
1236
853
    main()