/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2009-02-14 18:07:05 UTC
  • Revision ID: teddy@fukt.bsnet.se-20090214180705-vu6b7j4i2v2hibgg
Use "getconf" to get correct LFS compile and link flags.

* Makefile (GPGME_CFLAGS): Added output of "getconf LFS_CFLAGS".
  (GPGME_LIBS): Added output of "getconf LFS_LIBS" and
                "getconf LFS_LDFLAGS".
* plugins.d/mandos-client.c: Only define "_LARGEFILE_SOURCE" and
                             "_FILE_OFFSET_BITS" if they are not
                             already defined.

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Lines of Context:
mandos
11
11
# and some lines in "main".
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12
# 
13
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# Everything else is
14
 
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
 
14
# Copyright © 2008,2009 Teddy Hogeborn
 
15
# Copyright © 2008,2009 Björn Påhlsson
15
16
# 
16
17
# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
24
25
#     GNU General Public License for more details.
25
26
# 
26
27
# You should have received a copy of the GNU General Public License
27
 
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
28
# along with this program.  If not, see
 
29
# <http://www.gnu.org/licenses/>.
28
30
# 
29
31
# Contact the authors at <mandos@fukt.bsnet.se>.
30
32
# 
31
33
 
32
 
from __future__ import division
 
34
from __future__ import division, with_statement, absolute_import
33
35
 
34
36
import SocketServer
35
37
import socket
36
 
import select
37
 
from optparse import OptionParser
 
38
import optparse
38
39
import datetime
39
40
import errno
40
41
import gnutls.crypto
54
55
import stat
55
56
import logging
56
57
import logging.handlers
 
58
import pwd
 
59
from contextlib import closing
57
60
 
58
61
import dbus
 
62
import dbus.service
59
63
import gobject
60
64
import avahi
61
65
from dbus.mainloop.glib import DBusGMainLoop
62
66
import ctypes
 
67
import ctypes.util
63
68
 
 
69
version = "1.0.6"
64
70
 
65
71
logger = logging.Logger('mandos')
66
 
syslogger = logging.handlers.SysLogHandler\
67
 
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON)
68
 
syslogger.setFormatter(logging.Formatter\
69
 
                        ('%(levelname)s: %(message)s'))
 
72
syslogger = (logging.handlers.SysLogHandler
 
73
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
74
              address = "/dev/log"))
 
75
syslogger.setFormatter(logging.Formatter
 
76
                       ('Mandos [%(process)d]: %(levelname)s:'
 
77
                        ' %(message)s'))
70
78
logger.addHandler(syslogger)
71
 
del syslogger
72
79
 
 
80
console = logging.StreamHandler()
 
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
 
82
                                       ' %(levelname)s: %(message)s'))
 
83
logger.addHandler(console)
73
84
 
74
85
class AvahiError(Exception):
75
 
    def __init__(self, value):
 
86
    def __init__(self, value, *args, **kwargs):
76
87
        self.value = value
77
 
    def __str__(self):
78
 
        return repr(self.value)
 
88
        super(AvahiError, self).__init__(value, *args, **kwargs)
 
89
    def __unicode__(self):
 
90
        return unicode(repr(self.value))
79
91
 
80
92
class AvahiServiceError(AvahiError):
81
93
    pass
101
113
                  a sensible number of times
102
114
    """
103
115
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
104
 
                 type = None, port = None, TXT = None, domain = "",
105
 
                 host = "", max_renames = 12):
 
116
                 servicetype = None, port = None, TXT = None,
 
117
                 domain = "", host = "", max_renames = 32768,
 
118
                 protocol = avahi.PROTO_UNSPEC):
106
119
        self.interface = interface
107
120
        self.name = name
108
 
        self.type = type
 
121
        self.type = servicetype
109
122
        self.port = port
110
 
        if TXT is None:
111
 
            self.TXT = []
112
 
        else:
113
 
            self.TXT = TXT
 
123
        self.TXT = TXT if TXT is not None else []
114
124
        self.domain = domain
115
125
        self.host = host
116
126
        self.rename_count = 0
 
127
        self.max_renames = max_renames
 
128
        self.protocol = protocol
117
129
    def rename(self):
118
130
        """Derived from the Avahi example code"""
119
131
        if self.rename_count >= self.max_renames:
120
 
            logger.critical(u"No suitable service name found after %i"
121
 
                            u" retries, exiting.", rename_count)
122
 
            raise AvahiServiceError("Too many renames")
123
 
        name = server.GetAlternativeServiceName(name)
124
 
        logger.error(u"Changing name to %r ...", name)
 
132
            logger.critical(u"No suitable Zeroconf service name found"
 
133
                            u" after %i retries, exiting.",
 
134
                            self.rename_count)
 
135
            raise AvahiServiceError(u"Too many renames")
 
136
        self.name = server.GetAlternativeServiceName(self.name)
 
137
        logger.info(u"Changing Zeroconf service name to %r ...",
 
138
                    str(self.name))
 
139
        syslogger.setFormatter(logging.Formatter
 
140
                               ('Mandos (%s): %%(levelname)s:'
 
141
                                ' %%(message)s' % self.name))
125
142
        self.remove()
126
143
        self.add()
127
144
        self.rename_count += 1
133
150
        """Derived from the Avahi example code"""
134
151
        global group
135
152
        if group is None:
136
 
            group = dbus.Interface\
137
 
                    (bus.get_object(avahi.DBUS_NAME,
 
153
            group = dbus.Interface(bus.get_object
 
154
                                   (avahi.DBUS_NAME,
138
155
                                    server.EntryGroupNew()),
139
 
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
156
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
140
157
            group.connect_to_signal('StateChanged',
141
158
                                    entry_group_state_changed)
142
 
        logger.debug(u"Adding service '%s' of type '%s' ...",
 
159
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
143
160
                     service.name, service.type)
144
161
        group.AddService(
145
162
                self.interface,         # interface
146
 
                avahi.PROTO_INET6,      # protocol
 
163
                self.protocol,          # protocol
147
164
                dbus.UInt32(0),         # flags
148
165
                self.name, self.type,
149
166
                self.domain, self.host,
156
173
# End of Avahi example code
157
174
 
158
175
 
159
 
class Client(object):
 
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):
160
182
    """A representation of a client host served by this server.
161
183
    Attributes:
162
 
    name:      string; from the config file, used in log messages
 
184
    name:       string; from the config file, used in log messages and
 
185
                        D-Bus identifiers
163
186
    fingerprint: string (40 or 32 hexadecimal digits); used to
164
187
                 uniquely identify the client
165
 
    secret:    bytestring; sent verbatim (over TLS) to client
166
 
    host:      string; available for use by the checker command
167
 
    created:   datetime.datetime(); object creation, not client host
168
 
    last_checked_ok: datetime.datetime() or None if not yet checked OK
169
 
    timeout:   datetime.timedelta(); How long from last_checked_ok
170
 
                                     until this client is invalid
171
 
    interval:  datetime.timedelta(); How often to start a new checker
172
 
    stop_hook: If set, called by stop() as stop_hook(self)
173
 
    checker:   subprocess.Popen(); a running checker process used
174
 
                                   to see if the client lives.
175
 
                                   'None' if no process is running.
 
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.
176
201
    checker_initiator_tag: a gobject event source tag, or None
177
 
    stop_initiator_tag:    - '' -
 
202
    disable_initiator_tag:    - '' -
178
203
    checker_callback_tag:  - '' -
179
204
    checker_command: string; External command which is run to check if
180
205
                     client lives.  %() expansions are done at
181
206
                     runtime with vars(self) as dict, so that for
182
207
                     instance %(name)s can be used in the command.
183
 
    Private attibutes:
184
 
    _timeout: Real variable for 'timeout'
185
 
    _interval: Real variable for 'interval'
186
 
    _timeout_milliseconds: Used when calling gobject.timeout_add()
187
 
    _interval_milliseconds: - '' -
 
208
    current_checker_command: string; current running checker_command
 
209
    use_dbus: bool(); Whether to provide D-Bus interface and signals
 
210
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
188
211
    """
189
 
    def _set_timeout(self, timeout):
190
 
        "Setter function for 'timeout' attribute"
191
 
        self._timeout = timeout
192
 
        self._timeout_milliseconds = ((self.timeout.days
193
 
                                       * 24 * 60 * 60 * 1000)
194
 
                                      + (self.timeout.seconds * 1000)
195
 
                                      + (self.timeout.microseconds
196
 
                                         // 1000))
197
 
    timeout = property(lambda self: self._timeout,
198
 
                       _set_timeout)
199
 
    del _set_timeout
200
 
    def _set_interval(self, interval):
201
 
        "Setter function for 'interval' attribute"
202
 
        self._interval = interval
203
 
        self._interval_milliseconds = ((self.interval.days
204
 
                                        * 24 * 60 * 60 * 1000)
205
 
                                       + (self.interval.seconds
206
 
                                          * 1000)
207
 
                                       + (self.interval.microseconds
208
 
                                          // 1000))
209
 
    interval = property(lambda self: self._interval,
210
 
                        _set_interval)
211
 
    del _set_interval
212
 
    def __init__(self, name = None, stop_hook=None, config={}):
 
212
    def timeout_milliseconds(self):
 
213
        "Return the 'timeout' attribute in milliseconds"
 
214
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
 
215
                + (self.timeout.seconds * 1000)
 
216
                + (self.timeout.microseconds // 1000))
 
217
    
 
218
    def interval_milliseconds(self):
 
219
        "Return the 'interval' attribute in milliseconds"
 
220
        return ((self.interval.days * 24 * 60 * 60 * 1000)
 
221
                + (self.interval.seconds * 1000)
 
222
                + (self.interval.microseconds // 1000))
 
223
    
 
224
    def __init__(self, name = None, disable_hook=None, config=None,
 
225
                 use_dbus=True):
213
226
        """Note: the 'checker' key in 'config' sets the
214
227
        'checker_command' attribute and *not* the 'checker'
215
228
        attribute."""
216
229
        self.name = name
 
230
        if config is None:
 
231
            config = {}
217
232
        logger.debug(u"Creating client %r", self.name)
 
233
        self.use_dbus = False   # During __init__
218
234
        # Uppercase and remove spaces from fingerprint for later
219
235
        # comparison purposes with return value from the fingerprint()
220
236
        # function
221
 
        self.fingerprint = config["fingerprint"].upper()\
222
 
                           .replace(u" ", u"")
 
237
        self.fingerprint = (config["fingerprint"].upper()
 
238
                            .replace(u" ", u""))
223
239
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
224
240
        if "secret" in config:
225
241
            self.secret = config["secret"].decode(u"base64")
226
242
        elif "secfile" in config:
227
 
            sf = open(config["secfile"])
228
 
            self.secret = sf.read()
229
 
            sf.close()
 
243
            with closing(open(os.path.expanduser
 
244
                              (os.path.expandvars
 
245
                               (config["secfile"])))) as secfile:
 
246
                self.secret = secfile.read()
230
247
        else:
231
248
            raise TypeError(u"No secret or secfile for client %s"
232
249
                            % self.name)
233
250
        self.host = config.get("host", "")
234
 
        self.created = datetime.datetime.now()
 
251
        self.created = datetime.datetime.utcnow()
 
252
        self.enabled = False
 
253
        self.last_enabled = None
235
254
        self.last_checked_ok = None
236
255
        self.timeout = string_to_delta(config["timeout"])
237
256
        self.interval = string_to_delta(config["interval"])
238
 
        self.stop_hook = stop_hook
 
257
        self.disable_hook = disable_hook
239
258
        self.checker = None
240
259
        self.checker_initiator_tag = None
241
 
        self.stop_initiator_tag = None
 
260
        self.disable_initiator_tag = None
242
261
        self.checker_callback_tag = None
243
 
        self.check_command = config["checker"]
244
 
    def start(self):
 
262
        self.checker_command = config["checker"]
 
263
        self.current_checker_command = None
 
264
        self.last_connect = None
 
265
        # Only now, when this client is initialized, can it show up on
 
266
        # the D-Bus
 
267
        self.use_dbus = use_dbus
 
268
        if self.use_dbus:
 
269
            self.dbus_object_path = (dbus.ObjectPath
 
270
                                     ("/clients/"
 
271
                                      + self.name.replace(".", "_")))
 
272
            dbus.service.Object.__init__(self, bus,
 
273
                                         self.dbus_object_path)
 
274
    
 
275
    def enable(self):
245
276
        """Start this client's checker and timeout hooks"""
 
277
        self.last_enabled = datetime.datetime.utcnow()
246
278
        # Schedule a new checker to be started an 'interval' from now,
247
279
        # and every interval from then on.
248
 
        self.checker_initiator_tag = gobject.timeout_add\
249
 
                                     (self._interval_milliseconds,
250
 
                                      self.start_checker)
 
280
        self.checker_initiator_tag = (gobject.timeout_add
 
281
                                      (self.interval_milliseconds(),
 
282
                                       self.start_checker))
251
283
        # Also start a new checker *right now*.
252
284
        self.start_checker()
253
 
        # Schedule a stop() when 'timeout' has passed
254
 
        self.stop_initiator_tag = gobject.timeout_add\
255
 
                                  (self._timeout_milliseconds,
256
 
                                   self.stop)
257
 
    def stop(self):
258
 
        """Stop this client.
259
 
        The possibility that a client might be restarted is left open,
260
 
        but not currently used."""
261
 
        # If this client doesn't have a secret, it is already stopped.
262
 
        if hasattr(self, "secret") and self.secret:
263
 
            logger.info(u"Stopping client %s", self.name)
264
 
            self.secret = None
265
 
        else:
 
285
        # Schedule a disable() when 'timeout' has passed
 
286
        self.disable_initiator_tag = (gobject.timeout_add
 
287
                                   (self.timeout_milliseconds(),
 
288
                                    self.disable))
 
289
        self.enabled = True
 
290
        if self.use_dbus:
 
291
            # Emit D-Bus signals
 
292
            self.PropertyChanged(dbus.String(u"enabled"),
 
293
                                 dbus.Boolean(True, variant_level=1))
 
294
            self.PropertyChanged(dbus.String(u"last_enabled"),
 
295
                                 (_datetime_to_dbus(self.last_enabled,
 
296
                                                    variant_level=1)))
 
297
    
 
298
    def disable(self):
 
299
        """Disable this client."""
 
300
        if not getattr(self, "enabled", False):
266
301
            return False
267
 
        if getattr(self, "stop_initiator_tag", False):
268
 
            gobject.source_remove(self.stop_initiator_tag)
269
 
            self.stop_initiator_tag = None
 
302
        logger.info(u"Disabling client %s", self.name)
 
303
        if getattr(self, "disable_initiator_tag", False):
 
304
            gobject.source_remove(self.disable_initiator_tag)
 
305
            self.disable_initiator_tag = None
270
306
        if getattr(self, "checker_initiator_tag", False):
271
307
            gobject.source_remove(self.checker_initiator_tag)
272
308
            self.checker_initiator_tag = None
273
309
        self.stop_checker()
274
 
        if self.stop_hook:
275
 
            self.stop_hook(self)
 
310
        if self.disable_hook:
 
311
            self.disable_hook(self)
 
312
        self.enabled = False
 
313
        if self.use_dbus:
 
314
            # Emit D-Bus signal
 
315
            self.PropertyChanged(dbus.String(u"enabled"),
 
316
                                 dbus.Boolean(False, variant_level=1))
276
317
        # Do not run this again if called by a gobject.timeout_add
277
318
        return False
 
319
    
278
320
    def __del__(self):
279
 
        self.stop_hook = None
280
 
        self.stop()
281
 
    def checker_callback(self, pid, condition):
 
321
        self.disable_hook = None
 
322
        self.disable()
 
323
    
 
324
    def checker_callback(self, pid, condition, command):
282
325
        """The checker has completed, so take appropriate actions."""
283
 
        now = datetime.datetime.now()
284
326
        self.checker_callback_tag = None
285
327
        self.checker = None
286
 
        if os.WIFEXITED(condition) \
287
 
               and (os.WEXITSTATUS(condition) == 0):
288
 
            logger.info(u"Checker for %(name)s succeeded",
289
 
                        vars(self))
290
 
            self.last_checked_ok = now
291
 
            gobject.source_remove(self.stop_initiator_tag)
292
 
            self.stop_initiator_tag = gobject.timeout_add\
293
 
                                      (self._timeout_milliseconds,
294
 
                                       self.stop)
295
 
        elif not os.WIFEXITED(condition):
 
328
        if self.use_dbus:
 
329
            # Emit D-Bus signal
 
330
            self.PropertyChanged(dbus.String(u"checker_running"),
 
331
                                 dbus.Boolean(False, variant_level=1))
 
332
        if os.WIFEXITED(condition):
 
333
            exitstatus = os.WEXITSTATUS(condition)
 
334
            if exitstatus == 0:
 
335
                logger.info(u"Checker for %(name)s succeeded",
 
336
                            vars(self))
 
337
                self.checked_ok()
 
338
            else:
 
339
                logger.info(u"Checker for %(name)s failed",
 
340
                            vars(self))
 
341
            if self.use_dbus:
 
342
                # Emit D-Bus signal
 
343
                self.CheckerCompleted(dbus.Int16(exitstatus),
 
344
                                      dbus.Int64(condition),
 
345
                                      dbus.String(command))
 
346
        else:
296
347
            logger.warning(u"Checker for %(name)s crashed?",
297
348
                           vars(self))
298
 
        else:
299
 
            logger.info(u"Checker for %(name)s failed",
300
 
                        vars(self))
 
349
            if self.use_dbus:
 
350
                # Emit D-Bus signal
 
351
                self.CheckerCompleted(dbus.Int16(-1),
 
352
                                      dbus.Int64(condition),
 
353
                                      dbus.String(command))
 
354
    
 
355
    def checked_ok(self):
 
356
        """Bump up the timeout for this client.
 
357
        This should only be called when the client has been seen,
 
358
        alive and well.
 
359
        """
 
360
        self.last_checked_ok = datetime.datetime.utcnow()
 
361
        gobject.source_remove(self.disable_initiator_tag)
 
362
        self.disable_initiator_tag = (gobject.timeout_add
 
363
                                      (self.timeout_milliseconds(),
 
364
                                       self.disable))
 
365
        if self.use_dbus:
 
366
            # Emit D-Bus signal
 
367
            self.PropertyChanged(
 
368
                dbus.String(u"last_checked_ok"),
 
369
                (_datetime_to_dbus(self.last_checked_ok,
 
370
                                   variant_level=1)))
 
371
    
301
372
    def start_checker(self):
302
373
        """Start a new checker subprocess if one is not running.
303
374
        If a checker already exists, leave it running and do
310
381
        # checkers alone, the checker would have to take more time
311
382
        # than 'timeout' for the client to be declared invalid, which
312
383
        # is as it should be.
 
384
        
 
385
        # If a checker exists, make sure it is not a zombie
 
386
        if self.checker is not None:
 
387
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
388
            if pid:
 
389
                logger.warning("Checker was a zombie")
 
390
                gobject.source_remove(self.checker_callback_tag)
 
391
                self.checker_callback(pid, status,
 
392
                                      self.current_checker_command)
 
393
        # Start a new checker if needed
313
394
        if self.checker is None:
314
395
            try:
315
 
                # In case check_command has exactly one % operator
316
 
                command = self.check_command % self.host
 
396
                # In case checker_command has exactly one % operator
 
397
                command = self.checker_command % self.host
317
398
            except TypeError:
318
399
                # Escape attributes for the shell
319
400
                escaped_attrs = dict((key, re.escape(str(val)))
320
401
                                     for key, val in
321
402
                                     vars(self).iteritems())
322
403
                try:
323
 
                    command = self.check_command % escaped_attrs
 
404
                    command = self.checker_command % escaped_attrs
324
405
                except TypeError, error:
325
406
                    logger.error(u'Could not format string "%s":'
326
 
                                 u' %s', self.check_command, error)
 
407
                                 u' %s', self.checker_command, error)
327
408
                    return True # Try again later
 
409
                self.current_checker_command = command
328
410
            try:
329
411
                logger.info(u"Starting checker %r for %s",
330
412
                            command, self.name)
 
413
                # We don't need to redirect stdout and stderr, since
 
414
                # in normal mode, that is already done by daemon(),
 
415
                # and in debug mode we don't want to.  (Stdin is
 
416
                # always replaced by /dev/null.)
331
417
                self.checker = subprocess.Popen(command,
332
418
                                                close_fds=True,
333
419
                                                shell=True, cwd="/")
334
 
                self.checker_callback_tag = gobject.child_watch_add\
335
 
                                            (self.checker.pid,
336
 
                                             self.checker_callback)
337
 
            except subprocess.OSError, error:
 
420
                if self.use_dbus:
 
421
                    # Emit D-Bus signal
 
422
                    self.CheckerStarted(command)
 
423
                    self.PropertyChanged(
 
424
                        dbus.String("checker_running"),
 
425
                        dbus.Boolean(True, variant_level=1))
 
426
                self.checker_callback_tag = (gobject.child_watch_add
 
427
                                             (self.checker.pid,
 
428
                                              self.checker_callback,
 
429
                                              data=command))
 
430
                # The checker may have completed before the gobject
 
431
                # watch was added.  Check for this.
 
432
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
433
                if pid:
 
434
                    gobject.source_remove(self.checker_callback_tag)
 
435
                    self.checker_callback(pid, status, command)
 
436
            except OSError, error:
338
437
                logger.error(u"Failed to start subprocess: %s",
339
438
                             error)
340
439
        # Re-run this periodically if run by gobject.timeout_add
341
440
        return True
 
441
    
342
442
    def stop_checker(self):
343
443
        """Force the checker process, if any, to stop."""
344
444
        if self.checker_callback_tag:
356
456
            if error.errno != errno.ESRCH: # No such process
357
457
                raise
358
458
        self.checker = None
 
459
        if self.use_dbus:
 
460
            self.PropertyChanged(dbus.String(u"checker_running"),
 
461
                                 dbus.Boolean(False, variant_level=1))
 
462
    
359
463
    def still_valid(self):
360
464
        """Has the timeout not yet passed for this client?"""
361
 
        now = datetime.datetime.now()
 
465
        if not getattr(self, "enabled", False):
 
466
            return False
 
467
        now = datetime.datetime.utcnow()
362
468
        if self.last_checked_ok is None:
363
469
            return now < (self.created + self.timeout)
364
470
        else:
365
471
            return now < (self.last_checked_ok + self.timeout)
 
472
    
 
473
    ## D-Bus methods & signals
 
474
    _interface = u"se.bsnet.fukt.Mandos.Client"
 
475
    
 
476
    # CheckedOK - method
 
477
    CheckedOK = dbus.service.method(_interface)(checked_ok)
 
478
    CheckedOK.__name__ = "CheckedOK"
 
479
    
 
480
    # CheckerCompleted - signal
 
481
    @dbus.service.signal(_interface, signature="nxs")
 
482
    def CheckerCompleted(self, exitcode, waitstatus, command):
 
483
        "D-Bus signal"
 
484
        pass
 
485
    
 
486
    # CheckerStarted - signal
 
487
    @dbus.service.signal(_interface, signature="s")
 
488
    def CheckerStarted(self, command):
 
489
        "D-Bus signal"
 
490
        pass
 
491
    
 
492
    # GetAllProperties - method
 
493
    @dbus.service.method(_interface, out_signature="a{sv}")
 
494
    def GetAllProperties(self):
 
495
        "D-Bus method"
 
496
        return dbus.Dictionary({
 
497
                dbus.String("name"):
 
498
                    dbus.String(self.name, variant_level=1),
 
499
                dbus.String("fingerprint"):
 
500
                    dbus.String(self.fingerprint, variant_level=1),
 
501
                dbus.String("host"):
 
502
                    dbus.String(self.host, variant_level=1),
 
503
                dbus.String("created"):
 
504
                    _datetime_to_dbus(self.created, variant_level=1),
 
505
                dbus.String("last_enabled"):
 
506
                    (_datetime_to_dbus(self.last_enabled,
 
507
                                       variant_level=1)
 
508
                     if self.last_enabled is not None
 
509
                     else dbus.Boolean(False, variant_level=1)),
 
510
                dbus.String("enabled"):
 
511
                    dbus.Boolean(self.enabled, variant_level=1),
 
512
                dbus.String("last_checked_ok"):
 
513
                    (_datetime_to_dbus(self.last_checked_ok,
 
514
                                       variant_level=1)
 
515
                     if self.last_checked_ok is not None
 
516
                     else dbus.Boolean (False, variant_level=1)),
 
517
                dbus.String("timeout"):
 
518
                    dbus.UInt64(self.timeout_milliseconds(),
 
519
                                variant_level=1),
 
520
                dbus.String("interval"):
 
521
                    dbus.UInt64(self.interval_milliseconds(),
 
522
                                variant_level=1),
 
523
                dbus.String("checker"):
 
524
                    dbus.String(self.checker_command,
 
525
                                variant_level=1),
 
526
                dbus.String("checker_running"):
 
527
                    dbus.Boolean(self.checker is not None,
 
528
                                 variant_level=1),
 
529
                dbus.String("object_path"):
 
530
                    dbus.ObjectPath(self.dbus_object_path,
 
531
                                    variant_level=1)
 
532
                }, signature="sv")
 
533
    
 
534
    # IsStillValid - method
 
535
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
 
536
                    (still_valid))
 
537
    IsStillValid.__name__ = "IsStillValid"
 
538
    
 
539
    # PropertyChanged - signal
 
540
    @dbus.service.signal(_interface, signature="sv")
 
541
    def PropertyChanged(self, property, value):
 
542
        "D-Bus signal"
 
543
        pass
 
544
    
 
545
    # SetChecker - method
 
546
    @dbus.service.method(_interface, in_signature="s")
 
547
    def SetChecker(self, checker):
 
548
        "D-Bus setter method"
 
549
        self.checker_command = checker
 
550
        # Emit D-Bus signal
 
551
        self.PropertyChanged(dbus.String(u"checker"),
 
552
                             dbus.String(self.checker_command,
 
553
                                         variant_level=1))
 
554
    
 
555
    # SetHost - method
 
556
    @dbus.service.method(_interface, in_signature="s")
 
557
    def SetHost(self, host):
 
558
        "D-Bus setter method"
 
559
        self.host = host
 
560
        # Emit D-Bus signal
 
561
        self.PropertyChanged(dbus.String(u"host"),
 
562
                             dbus.String(self.host, variant_level=1))
 
563
    
 
564
    # SetInterval - method
 
565
    @dbus.service.method(_interface, in_signature="t")
 
566
    def SetInterval(self, milliseconds):
 
567
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
 
568
        # Emit D-Bus signal
 
569
        self.PropertyChanged(dbus.String(u"interval"),
 
570
                             (dbus.UInt64(self.interval_milliseconds(),
 
571
                                          variant_level=1)))
 
572
    
 
573
    # SetSecret - method
 
574
    @dbus.service.method(_interface, in_signature="ay",
 
575
                         byte_arrays=True)
 
576
    def SetSecret(self, secret):
 
577
        "D-Bus setter method"
 
578
        self.secret = str(secret)
 
579
    
 
580
    # SetTimeout - method
 
581
    @dbus.service.method(_interface, in_signature="t")
 
582
    def SetTimeout(self, milliseconds):
 
583
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
 
584
        # Emit D-Bus signal
 
585
        self.PropertyChanged(dbus.String(u"timeout"),
 
586
                             (dbus.UInt64(self.timeout_milliseconds(),
 
587
                                          variant_level=1)))
 
588
    
 
589
    # Enable - method
 
590
    Enable = dbus.service.method(_interface)(enable)
 
591
    Enable.__name__ = "Enable"
 
592
    
 
593
    # StartChecker - method
 
594
    @dbus.service.method(_interface)
 
595
    def StartChecker(self):
 
596
        "D-Bus method"
 
597
        self.start_checker()
 
598
    
 
599
    # Disable - method
 
600
    @dbus.service.method(_interface)
 
601
    def Disable(self):
 
602
        "D-Bus method"
 
603
        self.disable()
 
604
    
 
605
    # StopChecker - method
 
606
    StopChecker = dbus.service.method(_interface)(stop_checker)
 
607
    StopChecker.__name__ = "StopChecker"
 
608
    
 
609
    del _interface
366
610
 
367
611
 
368
612
def peer_certificate(session):
369
613
    "Return the peer's OpenPGP certificate as a bytestring"
370
614
    # If not an OpenPGP certificate...
371
 
    if gnutls.library.functions.gnutls_certificate_type_get\
372
 
            (session._c_object) \
373
 
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
615
    if (gnutls.library.functions
 
616
        .gnutls_certificate_type_get(session._c_object)
 
617
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
374
618
        # ...do the normal thing
375
619
        return session.peer_certificate
376
 
    list_size = ctypes.c_uint()
377
 
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
378
 
        (session._c_object, ctypes.byref(list_size))
 
620
    list_size = ctypes.c_uint(1)
 
621
    cert_list = (gnutls.library.functions
 
622
                 .gnutls_certificate_get_peers
 
623
                 (session._c_object, ctypes.byref(list_size)))
 
624
    if not bool(cert_list) and list_size.value != 0:
 
625
        raise gnutls.errors.GNUTLSError("error getting peer"
 
626
                                        " certificate")
379
627
    if list_size.value == 0:
380
628
        return None
381
629
    cert = cert_list[0]
385
633
def fingerprint(openpgp):
386
634
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
387
635
    # New GnuTLS "datum" with the OpenPGP public key
388
 
    datum = gnutls.library.types.gnutls_datum_t\
389
 
        (ctypes.cast(ctypes.c_char_p(openpgp),
390
 
                     ctypes.POINTER(ctypes.c_ubyte)),
391
 
         ctypes.c_uint(len(openpgp)))
 
636
    datum = (gnutls.library.types
 
637
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
638
                                         ctypes.POINTER
 
639
                                         (ctypes.c_ubyte)),
 
640
                             ctypes.c_uint(len(openpgp))))
392
641
    # New empty GnuTLS certificate
393
642
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
394
 
    gnutls.library.functions.gnutls_openpgp_crt_init\
395
 
        (ctypes.byref(crt))
 
643
    (gnutls.library.functions
 
644
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
396
645
    # Import the OpenPGP public key into the certificate
397
 
    gnutls.library.functions.gnutls_openpgp_crt_import\
398
 
                    (crt, ctypes.byref(datum),
399
 
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
646
    (gnutls.library.functions
 
647
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
648
                                gnutls.library.constants
 
649
                                .GNUTLS_OPENPGP_FMT_RAW))
 
650
    # Verify the self signature in the key
 
651
    crtverify = ctypes.c_uint()
 
652
    (gnutls.library.functions
 
653
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
 
654
    if crtverify.value != 0:
 
655
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
656
        raise gnutls.errors.CertificateSecurityError("Verify failed")
400
657
    # New buffer for the fingerprint
401
 
    buffer = ctypes.create_string_buffer(20)
402
 
    buffer_length = ctypes.c_size_t()
 
658
    buf = ctypes.create_string_buffer(20)
 
659
    buf_len = ctypes.c_size_t()
403
660
    # Get the fingerprint from the certificate into the buffer
404
 
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
405
 
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
661
    (gnutls.library.functions
 
662
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
663
                                         ctypes.byref(buf_len)))
406
664
    # Deinit the certificate
407
665
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
408
666
    # Convert the buffer to a Python bytestring
409
 
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
667
    fpr = ctypes.string_at(buf, buf_len.value)
410
668
    # Convert the bytestring to hexadecimal notation
411
669
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
412
670
    return hex_fpr
413
671
 
414
672
 
415
 
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
673
class TCP_handler(SocketServer.BaseRequestHandler, object):
416
674
    """A TCP request handler class.
417
675
    Instantiated by IPv6_TCPServer for each request to handle it.
418
676
    Note: This will run in its own forked process."""
419
677
    
420
678
    def handle(self):
421
679
        logger.info(u"TCP connection from: %s",
422
 
                     unicode(self.client_address))
423
 
        session = gnutls.connection.ClientSession\
424
 
                  (self.request, gnutls.connection.X509Credentials())
 
680
                    unicode(self.client_address))
 
681
        session = (gnutls.connection
 
682
                   .ClientSession(self.request,
 
683
                                  gnutls.connection
 
684
                                  .X509Credentials()))
425
685
        
426
686
        line = self.request.makefile().readline()
427
687
        logger.debug(u"Protocol version: %r", line)
438
698
        # using OpenPGP certificates.
439
699
        
440
700
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
441
 
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
442
 
        #                "+DHE-DSS"))
443
 
        priority = "NORMAL"             # Fallback default, since this
444
 
                                        # MUST be set.
445
 
        if self.server.settings["priority"]:
446
 
            priority = self.server.settings["priority"]
447
 
        gnutls.library.functions.gnutls_priority_set_direct\
448
 
            (session._c_object, priority, None);
 
701
        #                     "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
702
        #                     "+DHE-DSS"))
 
703
        # Use a fallback default, since this MUST be set.
 
704
        priority = self.server.settings.get("priority", "NORMAL")
 
705
        (gnutls.library.functions
 
706
         .gnutls_priority_set_direct(session._c_object,
 
707
                                     priority, None))
449
708
        
450
709
        try:
451
710
            session.handshake()
454
713
            # Do not run session.bye() here: the session is not
455
714
            # established.  Just abandon the request.
456
715
            return
 
716
        logger.debug(u"Handshake succeeded")
457
717
        try:
458
718
            fpr = fingerprint(peer_certificate(session))
459
719
        except (TypeError, gnutls.errors.GNUTLSError), error:
461
721
            session.bye()
462
722
            return
463
723
        logger.debug(u"Fingerprint: %s", fpr)
464
 
        client = None
 
724
        
465
725
        for c in self.server.clients:
466
726
            if c.fingerprint == fpr:
467
727
                client = c
468
728
                break
469
 
        if not client:
 
729
        else:
470
730
            logger.warning(u"Client not found for fingerprint: %s",
471
731
                           fpr)
472
732
            session.bye()
479
739
                           vars(client))
480
740
            session.bye()
481
741
            return
 
742
        ## This won't work here, since we're in a fork.
 
743
        # client.checked_ok()
482
744
        sent_size = 0
483
745
        while sent_size < len(client.secret):
484
746
            sent = session.send(client.secret[sent_size:])
489
751
        session.bye()
490
752
 
491
753
 
492
 
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
493
 
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
 
754
class IPv6_TCPServer(SocketServer.ForkingMixIn,
 
755
                     SocketServer.TCPServer, object):
 
756
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
494
757
    Attributes:
495
758
        settings:       Server settings
496
759
        clients:        Set() of Client objects
 
760
        enabled:        Boolean; whether this server is activated yet
497
761
    """
498
762
    address_family = socket.AF_INET6
499
763
    def __init__(self, *args, **kwargs):
503
767
        if "clients" in kwargs:
504
768
            self.clients = kwargs["clients"]
505
769
            del kwargs["clients"]
506
 
        return super(type(self), self).__init__(*args, **kwargs)
 
770
        if "use_ipv6" in kwargs:
 
771
            if not kwargs["use_ipv6"]:
 
772
                self.address_family = socket.AF_INET
 
773
            del kwargs["use_ipv6"]
 
774
        self.enabled = False
 
775
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
507
776
    def server_bind(self):
508
777
        """This overrides the normal server_bind() function
509
778
        to bind to an interface if one was specified, and also NOT to
521
790
                                 u" bind to interface %s",
522
791
                                 self.settings["interface"])
523
792
                else:
524
 
                    raise error
 
793
                    raise
525
794
        # Only bind(2) the socket if we really need to.
526
795
        if self.server_address[0] or self.server_address[1]:
527
796
            if not self.server_address[0]:
528
 
                in6addr_any = "::"
529
 
                self.server_address = (in6addr_any,
 
797
                if self.address_family == socket.AF_INET6:
 
798
                    any_address = "::" # in6addr_any
 
799
                else:
 
800
                    any_address = socket.INADDR_ANY
 
801
                self.server_address = (any_address,
530
802
                                       self.server_address[1])
531
803
            elif not self.server_address[1]:
532
804
                self.server_address = (self.server_address[0],
538
810
#                                            if_nametoindex
539
811
#                                            (self.settings
540
812
#                                             ["interface"]))
541
 
            return super(type(self), self).server_bind()
 
813
            return super(IPv6_TCPServer, self).server_bind()
 
814
    def server_activate(self):
 
815
        if self.enabled:
 
816
            return super(IPv6_TCPServer, self).server_activate()
 
817
    def enable(self):
 
818
        self.enabled = True
542
819
 
543
820
 
544
821
def string_to_delta(interval):
545
822
    """Parse a string and return a datetime.timedelta
546
 
 
 
823
    
547
824
    >>> string_to_delta('7d')
548
825
    datetime.timedelta(7)
549
826
    >>> string_to_delta('60s')
554
831
    datetime.timedelta(1)
555
832
    >>> string_to_delta(u'1w')
556
833
    datetime.timedelta(7)
 
834
    >>> string_to_delta('5m 30s')
 
835
    datetime.timedelta(0, 330)
557
836
    """
558
 
    try:
559
 
        suffix=unicode(interval[-1])
560
 
        value=int(interval[:-1])
561
 
        if suffix == u"d":
562
 
            delta = datetime.timedelta(value)
563
 
        elif suffix == u"s":
564
 
            delta = datetime.timedelta(0, value)
565
 
        elif suffix == u"m":
566
 
            delta = datetime.timedelta(0, 0, 0, 0, value)
567
 
        elif suffix == u"h":
568
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
569
 
        elif suffix == u"w":
570
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
571
 
        else:
 
837
    timevalue = datetime.timedelta(0)
 
838
    for s in interval.split():
 
839
        try:
 
840
            suffix = unicode(s[-1])
 
841
            value = int(s[:-1])
 
842
            if suffix == u"d":
 
843
                delta = datetime.timedelta(value)
 
844
            elif suffix == u"s":
 
845
                delta = datetime.timedelta(0, value)
 
846
            elif suffix == u"m":
 
847
                delta = datetime.timedelta(0, 0, 0, 0, value)
 
848
            elif suffix == u"h":
 
849
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
850
            elif suffix == u"w":
 
851
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
852
            else:
 
853
                raise ValueError
 
854
        except (ValueError, IndexError):
572
855
            raise ValueError
573
 
    except (ValueError, IndexError):
574
 
        raise ValueError
575
 
    return delta
 
856
        timevalue += delta
 
857
    return timevalue
576
858
 
577
859
 
578
860
def server_state_changed(state):
579
861
    """Derived from the Avahi example code"""
580
862
    if state == avahi.SERVER_COLLISION:
581
 
        logger.error(u"Server name collision")
 
863
        logger.error(u"Zeroconf server name collision")
582
864
        service.remove()
583
865
    elif state == avahi.SERVER_RUNNING:
584
866
        service.add()
586
868
 
587
869
def entry_group_state_changed(state, error):
588
870
    """Derived from the Avahi example code"""
589
 
    logger.debug(u"state change: %i", state)
 
871
    logger.debug(u"Avahi state change: %i", state)
590
872
    
591
873
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
592
 
        logger.debug(u"Service established.")
 
874
        logger.debug(u"Zeroconf service established.")
593
875
    elif state == avahi.ENTRY_GROUP_COLLISION:
594
 
        logger.warning(u"Service name collision.")
 
876
        logger.warning(u"Zeroconf service name collision.")
595
877
        service.rename()
596
878
    elif state == avahi.ENTRY_GROUP_FAILURE:
597
 
        logger.critical(u"Error in group state changed %s",
 
879
        logger.critical(u"Avahi: Error in group state changed %s",
598
880
                        unicode(error))
599
 
        raise AvahiGroupError("State changed: %s", str(error))
 
881
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
600
882
 
601
883
def if_nametoindex(interface):
602
884
    """Call the C function if_nametoindex(), or equivalent"""
603
885
    global if_nametoindex
604
886
    try:
605
 
        if "ctypes.util" not in sys.modules:
606
 
            import ctypes.util
607
 
        if_nametoindex = ctypes.cdll.LoadLibrary\
608
 
            (ctypes.util.find_library("c")).if_nametoindex
 
887
        if_nametoindex = (ctypes.cdll.LoadLibrary
 
888
                          (ctypes.util.find_library("c"))
 
889
                          .if_nametoindex)
609
890
    except (OSError, AttributeError):
610
891
        if "struct" not in sys.modules:
611
892
            import struct
614
895
        def if_nametoindex(interface):
615
896
            "Get an interface index the hard way, i.e. using fcntl()"
616
897
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
617
 
            s = socket.socket()
618
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
619
 
                                struct.pack("16s16x", interface))
620
 
            s.close()
 
898
            with closing(socket.socket()) as s:
 
899
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
900
                                    struct.pack("16s16x", interface))
621
901
            interface_index = struct.unpack("I", ifreq[16:20])[0]
622
902
            return interface_index
623
903
    return if_nametoindex(interface)
647
927
 
648
928
 
649
929
def main():
650
 
    global main_loop_started
651
 
    main_loop_started = False
652
 
    
653
 
    parser = OptionParser()
 
930
    parser = optparse.OptionParser(version = "%%prog %s" % version)
654
931
    parser.add_option("-i", "--interface", type="string",
655
932
                      metavar="IF", help="Bind to interface IF")
656
933
    parser.add_option("-a", "--address", type="string",
657
934
                      help="Address to listen for requests on")
658
935
    parser.add_option("-p", "--port", type="int",
659
936
                      help="Port number to receive requests on")
660
 
    parser.add_option("--check", action="store_true", default=False,
 
937
    parser.add_option("--check", action="store_true",
661
938
                      help="Run self-test")
662
939
    parser.add_option("--debug", action="store_true",
663
940
                      help="Debug mode; run in foreground and log to"
670
947
                      default="/etc/mandos", metavar="DIR",
671
948
                      help="Directory to search for configuration"
672
949
                      " files")
673
 
    (options, args) = parser.parse_args()
 
950
    parser.add_option("--no-dbus", action="store_false",
 
951
                      dest="use_dbus",
 
952
                      help="Do not provide D-Bus system bus"
 
953
                      " interface")
 
954
    parser.add_option("--no-ipv6", action="store_false",
 
955
                      dest="use_ipv6", help="Do not use IPv6")
 
956
    options = parser.parse_args()[0]
674
957
    
675
958
    if options.check:
676
959
        import doctest
685
968
                        "priority":
686
969
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
687
970
                        "servicename": "Mandos",
 
971
                        "use_dbus": "True",
 
972
                        "use_ipv6": "True",
688
973
                        }
689
974
    
690
975
    # Parse config file for server-global settings
691
976
    server_config = ConfigParser.SafeConfigParser(server_defaults)
692
977
    del server_defaults
693
978
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
694
 
    server_section = "server"
695
979
    # Convert the SafeConfigParser object to a dict
696
 
    server_settings = dict(server_config.items(server_section))
697
 
    # Use getboolean on the boolean config option
698
 
    server_settings["debug"] = server_config.getboolean\
699
 
                               (server_section, "debug")
 
980
    server_settings = server_config.defaults()
 
981
    # Use the appropriate methods on the non-string config options
 
982
    server_settings["debug"] = server_config.getboolean("DEFAULT",
 
983
                                                        "debug")
 
984
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
 
985
                                                           "use_dbus")
 
986
    server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
 
987
                                                           "use_ipv6")
 
988
    if server_settings["port"]:
 
989
        server_settings["port"] = server_config.getint("DEFAULT",
 
990
                                                       "port")
700
991
    del server_config
701
992
    
702
993
    # Override the settings from the config file with command line
703
994
    # options, if set.
704
995
    for option in ("interface", "address", "port", "debug",
705
 
                   "priority", "servicename", "configdir"):
 
996
                   "priority", "servicename", "configdir",
 
997
                   "use_dbus", "use_ipv6"):
706
998
        value = getattr(options, option)
707
999
        if value is not None:
708
1000
            server_settings[option] = value
709
1001
    del options
710
1002
    # Now we have our good server settings in "server_settings"
711
1003
    
 
1004
    # For convenience
 
1005
    debug = server_settings["debug"]
 
1006
    use_dbus = server_settings["use_dbus"]
 
1007
    use_ipv6 = server_settings["use_ipv6"]
 
1008
    
 
1009
    if not debug:
 
1010
        syslogger.setLevel(logging.WARNING)
 
1011
        console.setLevel(logging.WARNING)
 
1012
    
 
1013
    if server_settings["servicename"] != "Mandos":
 
1014
        syslogger.setFormatter(logging.Formatter
 
1015
                               ('Mandos (%s): %%(levelname)s:'
 
1016
                                ' %%(message)s'
 
1017
                                % server_settings["servicename"]))
 
1018
    
712
1019
    # Parse config file with clients
713
1020
    client_defaults = { "timeout": "1h",
714
1021
                        "interval": "5m",
715
1022
                        "checker": "fping -q -- %%(host)s",
 
1023
                        "host": "",
716
1024
                        }
717
1025
    client_config = ConfigParser.SafeConfigParser(client_defaults)
718
1026
    client_config.read(os.path.join(server_settings["configdir"],
719
1027
                                    "clients.conf"))
720
1028
    
 
1029
    clients = Set()
 
1030
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
1031
                                 server_settings["port"]),
 
1032
                                TCP_handler,
 
1033
                                settings=server_settings,
 
1034
                                clients=clients, use_ipv6=use_ipv6)
 
1035
    pidfilename = "/var/run/mandos.pid"
 
1036
    try:
 
1037
        pidfile = open(pidfilename, "w")
 
1038
    except IOError:
 
1039
        logger.error("Could not open file %r", pidfilename)
 
1040
    
 
1041
    try:
 
1042
        uid = pwd.getpwnam("_mandos").pw_uid
 
1043
        gid = pwd.getpwnam("_mandos").pw_gid
 
1044
    except KeyError:
 
1045
        try:
 
1046
            uid = pwd.getpwnam("mandos").pw_uid
 
1047
            gid = pwd.getpwnam("mandos").pw_gid
 
1048
        except KeyError:
 
1049
            try:
 
1050
                uid = pwd.getpwnam("nobody").pw_uid
 
1051
                gid = pwd.getpwnam("nogroup").pw_gid
 
1052
            except KeyError:
 
1053
                uid = 65534
 
1054
                gid = 65534
 
1055
    try:
 
1056
        os.setgid(gid)
 
1057
        os.setuid(uid)
 
1058
    except OSError, error:
 
1059
        if error[0] != errno.EPERM:
 
1060
            raise error
 
1061
    
 
1062
    # Enable all possible GnuTLS debugging
 
1063
    if debug:
 
1064
        # "Use a log level over 10 to enable all debugging options."
 
1065
        # - GnuTLS manual
 
1066
        gnutls.library.functions.gnutls_global_set_log_level(11)
 
1067
        
 
1068
        @gnutls.library.types.gnutls_log_func
 
1069
        def debug_gnutls(level, string):
 
1070
            logger.debug("GnuTLS: %s", string[:-1])
 
1071
        
 
1072
        (gnutls.library.functions
 
1073
         .gnutls_global_set_log_function(debug_gnutls))
 
1074
    
721
1075
    global service
 
1076
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
722
1077
    service = AvahiService(name = server_settings["servicename"],
723
 
                           type = "_mandos._tcp", );
 
1078
                           servicetype = "_mandos._tcp",
 
1079
                           protocol = protocol)
724
1080
    if server_settings["interface"]:
725
 
        service.interface = if_nametoindex(server_settings["interface"])
 
1081
        service.interface = (if_nametoindex
 
1082
                             (server_settings["interface"]))
726
1083
    
727
1084
    global main_loop
728
1085
    global bus
731
1088
    DBusGMainLoop(set_as_default=True )
732
1089
    main_loop = gobject.MainLoop()
733
1090
    bus = dbus.SystemBus()
734
 
    server = dbus.Interface(
735
 
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
736
 
            avahi.DBUS_INTERFACE_SERVER )
 
1091
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
1092
                                           avahi.DBUS_PATH_SERVER),
 
1093
                            avahi.DBUS_INTERFACE_SERVER)
737
1094
    # End of Avahi example code
738
 
    
739
 
    debug = server_settings["debug"]
740
 
    
741
 
    if debug:
742
 
        console = logging.StreamHandler()
743
 
        # console.setLevel(logging.DEBUG)
744
 
        console.setFormatter(logging.Formatter\
745
 
                             ('%(levelname)s: %(message)s'))
746
 
        logger.addHandler(console)
747
 
        del console
748
 
    
749
 
    clients = Set()
750
 
    def remove_from_clients(client):
751
 
        clients.remove(client)
752
 
        if not clients:
753
 
            logger.critical(u"No clients left, exiting")
754
 
            sys.exit()
 
1095
    if use_dbus:
 
1096
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
755
1097
    
756
1098
    clients.update(Set(Client(name = section,
757
 
                              stop_hook = remove_from_clients,
758
1099
                              config
759
 
                              = dict(client_config.items(section)))
 
1100
                              = dict(client_config.items(section)),
 
1101
                              use_dbus = use_dbus)
760
1102
                       for section in client_config.sections()))
761
1103
    if not clients:
762
 
        logger.critical(u"No clients defined")
763
 
        sys.exit(1)
 
1104
        logger.warning(u"No clients defined")
764
1105
    
765
 
    if not debug:
 
1106
    if debug:
 
1107
        # Redirect stdin so all checkers get /dev/null
 
1108
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
1109
        os.dup2(null, sys.stdin.fileno())
 
1110
        if null > 2:
 
1111
            os.close(null)
 
1112
    else:
 
1113
        # No console logging
 
1114
        logger.removeHandler(console)
 
1115
        # Close all input and output, do double fork, etc.
766
1116
        daemon()
767
1117
    
768
 
    pidfilename = "/var/run/mandos/mandos.pid"
769
 
    pid = os.getpid()
770
1118
    try:
771
 
        pidfile = open(pidfilename, "w")
 
1119
        pid = os.getpid()
772
1120
        pidfile.write(str(pid) + "\n")
773
1121
        pidfile.close()
774
1122
        del pidfile
775
 
    except IOError, err:
776
 
        logger.error(u"Could not write %s file with PID %d",
777
 
                     pidfilename, os.getpid())
 
1123
    except IOError:
 
1124
        logger.error(u"Could not write to file %r with PID %d",
 
1125
                     pidfilename, pid)
 
1126
    except NameError:
 
1127
        # "pidfile" was never created
 
1128
        pass
 
1129
    del pidfilename
778
1130
    
779
1131
    def cleanup():
780
1132
        "Cleanup function; run on exit"
787
1139
        
788
1140
        while clients:
789
1141
            client = clients.pop()
790
 
            client.stop_hook = None
791
 
            client.stop()
 
1142
            client.disable_hook = None
 
1143
            client.disable()
792
1144
    
793
1145
    atexit.register(cleanup)
794
1146
    
797
1149
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
798
1150
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
799
1151
    
 
1152
    if use_dbus:
 
1153
        class MandosServer(dbus.service.Object):
 
1154
            """A D-Bus proxy object"""
 
1155
            def __init__(self):
 
1156
                dbus.service.Object.__init__(self, bus, "/")
 
1157
            _interface = u"se.bsnet.fukt.Mandos"
 
1158
            
 
1159
            @dbus.service.signal(_interface, signature="oa{sv}")
 
1160
            def ClientAdded(self, objpath, properties):
 
1161
                "D-Bus signal"
 
1162
                pass
 
1163
            
 
1164
            @dbus.service.signal(_interface, signature="os")
 
1165
            def ClientRemoved(self, objpath, name):
 
1166
                "D-Bus signal"
 
1167
                pass
 
1168
            
 
1169
            @dbus.service.method(_interface, out_signature="ao")
 
1170
            def GetAllClients(self):
 
1171
                "D-Bus method"
 
1172
                return dbus.Array(c.dbus_object_path for c in clients)
 
1173
            
 
1174
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
 
1175
            def GetAllClientsWithProperties(self):
 
1176
                "D-Bus method"
 
1177
                return dbus.Dictionary(
 
1178
                    ((c.dbus_object_path, c.GetAllProperties())
 
1179
                     for c in clients),
 
1180
                    signature="oa{sv}")
 
1181
            
 
1182
            @dbus.service.method(_interface, in_signature="o")
 
1183
            def RemoveClient(self, object_path):
 
1184
                "D-Bus method"
 
1185
                for c in clients:
 
1186
                    if c.dbus_object_path == object_path:
 
1187
                        clients.remove(c)
 
1188
                        # Don't signal anything except ClientRemoved
 
1189
                        c.use_dbus = False
 
1190
                        c.disable()
 
1191
                        # Emit D-Bus signal
 
1192
                        self.ClientRemoved(object_path, c.name)
 
1193
                        return
 
1194
                raise KeyError
 
1195
            
 
1196
            del _interface
 
1197
        
 
1198
        mandos_server = MandosServer()
 
1199
    
800
1200
    for client in clients:
801
 
        client.start()
802
 
    
803
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
804
 
                                 server_settings["port"]),
805
 
                                tcp_handler,
806
 
                                settings=server_settings,
807
 
                                clients=clients)
 
1201
        if use_dbus:
 
1202
            # Emit D-Bus signal
 
1203
            mandos_server.ClientAdded(client.dbus_object_path,
 
1204
                                      client.GetAllProperties())
 
1205
        client.enable()
 
1206
    
 
1207
    tcp_server.enable()
 
1208
    tcp_server.server_activate()
 
1209
    
808
1210
    # Find out what port we got
809
1211
    service.port = tcp_server.socket.getsockname()[1]
810
 
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
811
 
                u" scope_id %d" % tcp_server.socket.getsockname())
 
1212
    if use_ipv6:
 
1213
        logger.info(u"Now listening on address %r, port %d,"
 
1214
                    " flowinfo %d, scope_id %d"
 
1215
                    % tcp_server.socket.getsockname())
 
1216
    else:                       # IPv4
 
1217
        logger.info(u"Now listening on address %r, port %d"
 
1218
                    % tcp_server.socket.getsockname())
812
1219
    
813
1220
    #service.interface = tcp_server.socket.getsockname()[3]
814
1221
    
824
1231
        
825
1232
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
826
1233
                             lambda *args, **kwargs:
827
 
                             tcp_server.handle_request\
828
 
                             (*args[2:], **kwargs) or True)
 
1234
                             (tcp_server.handle_request
 
1235
                              (*args[2:], **kwargs) or True))
829
1236
        
830
1237
        logger.debug(u"Starting main loop")
831
 
        main_loop_started = True
832
1238
        main_loop.run()
833
1239
    except AvahiError, error:
834
 
        logger.critical(u"AvahiError: %s" + unicode(error))
 
1240
        logger.critical(u"AvahiError: %s", error)
835
1241
        sys.exit(1)
836
1242
    except KeyboardInterrupt:
837
1243
        if debug:
838
 
            print
 
1244
            print >> sys.stderr
 
1245
        logger.debug("Server received KeyboardInterrupt")
 
1246
    logger.debug("Server exiting")
839
1247
 
840
1248
if __name__ == '__main__':
841
1249
    main()