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Merge from trunk.  Bug fix for initramfs-tools-hook.

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Lines of Context:
mandos
11
11
# and some lines in "main".
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# 
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
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#     GNU General Public License for more details.
25
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# 
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 = "1.0.7"
64
70
 
65
71
logger = logging.Logger('mandos')
66
 
syslogger = logging.handlers.SysLogHandler\
67
 
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
68
 
             address = "/dev/log")
69
 
syslogger.setFormatter(logging.Formatter\
70
 
                        ('Mandos: %(levelname)s: %(message)s'))
 
72
syslogger = (logging.handlers.SysLogHandler
 
73
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
74
              address = "/dev/log"))
 
75
syslogger.setFormatter(logging.Formatter
 
76
                       ('Mandos [%(process)d]: %(levelname)s:'
 
77
                        ' %(message)s'))
71
78
logger.addHandler(syslogger)
72
79
 
 
80
console = logging.StreamHandler()
 
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
 
82
                                       ' %(levelname)s: %(message)s'))
 
83
logger.addHandler(console)
73
84
 
74
85
class AvahiError(Exception):
75
 
    def __init__(self, value):
 
86
    def __init__(self, value, *args, **kwargs):
76
87
        self.value = value
77
 
    def __str__(self):
78
 
        return repr(self.value)
 
88
        super(AvahiError, self).__init__(value, *args, **kwargs)
 
89
    def __unicode__(self):
 
90
        return unicode(repr(self.value))
79
91
 
80
92
class AvahiServiceError(AvahiError):
81
93
    pass
101
113
                  a sensible number of times
102
114
    """
103
115
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
104
 
                 type = None, port = None, TXT = None, domain = "",
105
 
                 host = "", max_renames = 32768):
 
116
                 servicetype = None, port = None, TXT = None,
 
117
                 domain = "", host = "", max_renames = 32768,
 
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)
125
 
        syslogger.setFormatter(logging.Formatter\
 
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
126
140
                               ('Mandos (%s): %%(levelname)s:'
127
 
                               ' %%(message)s' % name))
 
141
                                ' %%(message)s' % self.name))
128
142
        self.remove()
129
143
        self.add()
130
144
        self.rename_count += 1
136
150
        """Derived from the Avahi example code"""
137
151
        global group
138
152
        if group is None:
139
 
            group = dbus.Interface\
140
 
                    (bus.get_object(avahi.DBUS_NAME,
 
153
            group = dbus.Interface(bus.get_object
 
154
                                   (avahi.DBUS_NAME,
141
155
                                    server.EntryGroupNew()),
142
 
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
156
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
143
157
            group.connect_to_signal('StateChanged',
144
158
                                    entry_group_state_changed)
145
 
        logger.debug(u"Adding service '%s' of type '%s' ...",
 
159
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
146
160
                     service.name, service.type)
147
161
        group.AddService(
148
162
                self.interface,         # interface
149
 
                avahi.PROTO_INET6,      # protocol
 
163
                self.protocol,          # protocol
150
164
                dbus.UInt32(0),         # flags
151
165
                self.name, self.type,
152
166
                self.domain, self.host,
159
173
# End of Avahi example code
160
174
 
161
175
 
162
 
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):
163
182
    """A representation of a client host served by this server.
164
183
    Attributes:
165
 
    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
166
186
    fingerprint: string (40 or 32 hexadecimal digits); used to
167
187
                 uniquely identify the client
168
 
    secret:    bytestring; sent verbatim (over TLS) to client
169
 
    host:      string; available for use by the checker command
170
 
    created:   datetime.datetime(); object creation, not client host
171
 
    last_checked_ok: datetime.datetime() or None if not yet checked OK
172
 
    timeout:   datetime.timedelta(); How long from last_checked_ok
173
 
                                     until this client is invalid
174
 
    interval:  datetime.timedelta(); How often to start a new checker
175
 
    stop_hook: If set, called by stop() as stop_hook(self)
176
 
    checker:   subprocess.Popen(); a running checker process used
177
 
                                   to see if the client lives.
178
 
                                   'None' if no process is running.
 
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.
179
201
    checker_initiator_tag: a gobject event source tag, or None
180
 
    stop_initiator_tag:    - '' -
 
202
    disable_initiator_tag:    - '' -
181
203
    checker_callback_tag:  - '' -
182
204
    checker_command: string; External command which is run to check if
183
205
                     client lives.  %() expansions are done at
184
206
                     runtime with vars(self) as dict, so that for
185
207
                     instance %(name)s can be used in the command.
186
 
    Private attibutes:
187
 
    _timeout: Real variable for 'timeout'
188
 
    _interval: Real variable for 'interval'
189
 
    _timeout_milliseconds: Used when calling gobject.timeout_add()
190
 
    _interval_milliseconds: - '' -
 
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
191
211
    """
192
 
    def _set_timeout(self, timeout):
193
 
        "Setter function for 'timeout' attribute"
194
 
        self._timeout = timeout
195
 
        self._timeout_milliseconds = ((self.timeout.days
196
 
                                       * 24 * 60 * 60 * 1000)
197
 
                                      + (self.timeout.seconds * 1000)
198
 
                                      + (self.timeout.microseconds
199
 
                                         // 1000))
200
 
    timeout = property(lambda self: self._timeout,
201
 
                       _set_timeout)
202
 
    del _set_timeout
203
 
    def _set_interval(self, interval):
204
 
        "Setter function for 'interval' attribute"
205
 
        self._interval = interval
206
 
        self._interval_milliseconds = ((self.interval.days
207
 
                                        * 24 * 60 * 60 * 1000)
208
 
                                       + (self.interval.seconds
209
 
                                          * 1000)
210
 
                                       + (self.interval.microseconds
211
 
                                          // 1000))
212
 
    interval = property(lambda self: self._interval,
213
 
                        _set_interval)
214
 
    del _set_interval
215
 
    def __init__(self, name = None, stop_hook=None, config={}):
 
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):
216
226
        """Note: the 'checker' key in 'config' sets the
217
227
        'checker_command' attribute and *not* the 'checker'
218
228
        attribute."""
219
229
        self.name = name
 
230
        if config is None:
 
231
            config = {}
220
232
        logger.debug(u"Creating client %r", self.name)
 
233
        self.use_dbus = False   # During __init__
221
234
        # Uppercase and remove spaces from fingerprint for later
222
235
        # comparison purposes with return value from the fingerprint()
223
236
        # function
224
 
        self.fingerprint = config["fingerprint"].upper()\
225
 
                           .replace(u" ", u"")
 
237
        self.fingerprint = (config["fingerprint"].upper()
 
238
                            .replace(u" ", u""))
226
239
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
227
240
        if "secret" in config:
228
241
            self.secret = config["secret"].decode(u"base64")
229
242
        elif "secfile" in config:
230
 
            sf = open(config["secfile"])
231
 
            self.secret = sf.read()
232
 
            sf.close()
 
243
            with closing(open(os.path.expanduser
 
244
                              (os.path.expandvars
 
245
                               (config["secfile"])))) as secfile:
 
246
                self.secret = secfile.read()
233
247
        else:
234
248
            raise TypeError(u"No secret or secfile for client %s"
235
249
                            % self.name)
236
250
        self.host = config.get("host", "")
237
 
        self.created = datetime.datetime.now()
 
251
        self.created = datetime.datetime.utcnow()
 
252
        self.enabled = False
 
253
        self.last_enabled = None
238
254
        self.last_checked_ok = None
239
255
        self.timeout = string_to_delta(config["timeout"])
240
256
        self.interval = string_to_delta(config["interval"])
241
 
        self.stop_hook = stop_hook
 
257
        self.disable_hook = disable_hook
242
258
        self.checker = None
243
259
        self.checker_initiator_tag = None
244
 
        self.stop_initiator_tag = None
 
260
        self.disable_initiator_tag = None
245
261
        self.checker_callback_tag = None
246
 
        self.check_command = config["checker"]
247
 
    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):
248
276
        """Start this client's checker and timeout hooks"""
 
277
        self.last_enabled = datetime.datetime.utcnow()
249
278
        # Schedule a new checker to be started an 'interval' from now,
250
279
        # and every interval from then on.
251
 
        self.checker_initiator_tag = gobject.timeout_add\
252
 
                                     (self._interval_milliseconds,
253
 
                                      self.start_checker)
 
280
        self.checker_initiator_tag = (gobject.timeout_add
 
281
                                      (self.interval_milliseconds(),
 
282
                                       self.start_checker))
254
283
        # Also start a new checker *right now*.
255
284
        self.start_checker()
256
 
        # Schedule a stop() when 'timeout' has passed
257
 
        self.stop_initiator_tag = gobject.timeout_add\
258
 
                                  (self._timeout_milliseconds,
259
 
                                   self.stop)
260
 
    def stop(self):
261
 
        """Stop this client.
262
 
        The possibility that a client might be restarted is left open,
263
 
        but not currently used."""
264
 
        # If this client doesn't have a secret, it is already stopped.
265
 
        if hasattr(self, "secret") and self.secret:
266
 
            logger.info(u"Stopping client %s", self.name)
267
 
            self.secret = None
268
 
        else:
 
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):
269
301
            return False
270
 
        if getattr(self, "stop_initiator_tag", False):
271
 
            gobject.source_remove(self.stop_initiator_tag)
272
 
            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
273
306
        if getattr(self, "checker_initiator_tag", False):
274
307
            gobject.source_remove(self.checker_initiator_tag)
275
308
            self.checker_initiator_tag = None
276
309
        self.stop_checker()
277
 
        if self.stop_hook:
278
 
            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))
279
317
        # Do not run this again if called by a gobject.timeout_add
280
318
        return False
 
319
    
281
320
    def __del__(self):
282
 
        self.stop_hook = None
283
 
        self.stop()
284
 
    def checker_callback(self, pid, condition):
 
321
        self.disable_hook = None
 
322
        self.disable()
 
323
    
 
324
    def checker_callback(self, pid, condition, command):
285
325
        """The checker has completed, so take appropriate actions."""
286
 
        now = datetime.datetime.now()
287
326
        self.checker_callback_tag = None
288
327
        self.checker = None
289
 
        if os.WIFEXITED(condition) \
290
 
               and (os.WEXITSTATUS(condition) == 0):
291
 
            logger.info(u"Checker for %(name)s succeeded",
292
 
                        vars(self))
293
 
            self.last_checked_ok = now
294
 
            gobject.source_remove(self.stop_initiator_tag)
295
 
            self.stop_initiator_tag = gobject.timeout_add\
296
 
                                      (self._timeout_milliseconds,
297
 
                                       self.stop)
298
 
        elif not os.WIFEXITED(condition):
 
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:
299
347
            logger.warning(u"Checker for %(name)s crashed?",
300
348
                           vars(self))
301
 
        else:
302
 
            logger.info(u"Checker for %(name)s failed",
303
 
                        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
    
304
372
    def start_checker(self):
305
373
        """Start a new checker subprocess if one is not running.
306
374
        If a checker already exists, leave it running and do
313
381
        # checkers alone, the checker would have to take more time
314
382
        # than 'timeout' for the client to be declared invalid, which
315
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
316
394
        if self.checker is None:
317
395
            try:
318
 
                # In case check_command has exactly one % operator
319
 
                command = self.check_command % self.host
 
396
                # In case checker_command has exactly one % operator
 
397
                command = self.checker_command % self.host
320
398
            except TypeError:
321
399
                # Escape attributes for the shell
322
400
                escaped_attrs = dict((key, re.escape(str(val)))
323
401
                                     for key, val in
324
402
                                     vars(self).iteritems())
325
403
                try:
326
 
                    command = self.check_command % escaped_attrs
 
404
                    command = self.checker_command % escaped_attrs
327
405
                except TypeError, error:
328
406
                    logger.error(u'Could not format string "%s":'
329
 
                                 u' %s', self.check_command, error)
 
407
                                 u' %s', self.checker_command, error)
330
408
                    return True # Try again later
 
409
                self.current_checker_command = command
331
410
            try:
332
411
                logger.info(u"Starting checker %r for %s",
333
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.)
334
417
                self.checker = subprocess.Popen(command,
335
418
                                                close_fds=True,
336
419
                                                shell=True, cwd="/")
337
 
                self.checker_callback_tag = gobject.child_watch_add\
338
 
                                            (self.checker.pid,
339
 
                                             self.checker_callback)
340
 
            except subprocess.OSError, error:
 
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:
341
437
                logger.error(u"Failed to start subprocess: %s",
342
438
                             error)
343
439
        # Re-run this periodically if run by gobject.timeout_add
344
440
        return True
 
441
    
345
442
    def stop_checker(self):
346
443
        """Force the checker process, if any, to stop."""
347
444
        if self.checker_callback_tag:
359
456
            if error.errno != errno.ESRCH: # No such process
360
457
                raise
361
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
    
362
463
    def still_valid(self):
363
464
        """Has the timeout not yet passed for this client?"""
364
 
        now = datetime.datetime.now()
 
465
        if not getattr(self, "enabled", False):
 
466
            return False
 
467
        now = datetime.datetime.utcnow()
365
468
        if self.last_checked_ok is None:
366
469
            return now < (self.created + self.timeout)
367
470
        else:
368
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
369
610
 
370
611
 
371
612
def peer_certificate(session):
372
613
    "Return the peer's OpenPGP certificate as a bytestring"
373
614
    # If not an OpenPGP certificate...
374
 
    if gnutls.library.functions.gnutls_certificate_type_get\
375
 
            (session._c_object) \
376
 
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
615
    if (gnutls.library.functions
 
616
        .gnutls_certificate_type_get(session._c_object)
 
617
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
377
618
        # ...do the normal thing
378
619
        return session.peer_certificate
379
 
    list_size = ctypes.c_uint()
380
 
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
381
 
        (session._c_object, ctypes.byref(list_size))
 
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")
382
627
    if list_size.value == 0:
383
628
        return None
384
629
    cert = cert_list[0]
388
633
def fingerprint(openpgp):
389
634
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
390
635
    # New GnuTLS "datum" with the OpenPGP public key
391
 
    datum = gnutls.library.types.gnutls_datum_t\
392
 
        (ctypes.cast(ctypes.c_char_p(openpgp),
393
 
                     ctypes.POINTER(ctypes.c_ubyte)),
394
 
         ctypes.c_uint(len(openpgp)))
 
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))))
395
641
    # New empty GnuTLS certificate
396
642
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
397
 
    gnutls.library.functions.gnutls_openpgp_crt_init\
398
 
        (ctypes.byref(crt))
 
643
    (gnutls.library.functions
 
644
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
399
645
    # Import the OpenPGP public key into the certificate
400
 
    gnutls.library.functions.gnutls_openpgp_crt_import\
401
 
                    (crt, ctypes.byref(datum),
402
 
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
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")
403
657
    # New buffer for the fingerprint
404
 
    buffer = ctypes.create_string_buffer(20)
405
 
    buffer_length = ctypes.c_size_t()
 
658
    buf = ctypes.create_string_buffer(20)
 
659
    buf_len = ctypes.c_size_t()
406
660
    # Get the fingerprint from the certificate into the buffer
407
 
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
408
 
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
661
    (gnutls.library.functions
 
662
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
663
                                         ctypes.byref(buf_len)))
409
664
    # Deinit the certificate
410
665
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
411
666
    # Convert the buffer to a Python bytestring
412
 
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
667
    fpr = ctypes.string_at(buf, buf_len.value)
413
668
    # Convert the bytestring to hexadecimal notation
414
669
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
415
670
    return hex_fpr
416
671
 
417
672
 
418
 
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
673
class TCP_handler(SocketServer.BaseRequestHandler, object):
419
674
    """A TCP request handler class.
420
675
    Instantiated by IPv6_TCPServer for each request to handle it.
421
676
    Note: This will run in its own forked process."""
422
677
    
423
678
    def handle(self):
424
679
        logger.info(u"TCP connection from: %s",
425
 
                     unicode(self.client_address))
426
 
        session = gnutls.connection.ClientSession\
427
 
                  (self.request, gnutls.connection.X509Credentials())
 
680
                    unicode(self.client_address))
 
681
        session = (gnutls.connection
 
682
                   .ClientSession(self.request,
 
683
                                  gnutls.connection
 
684
                                  .X509Credentials()))
428
685
        
429
686
        line = self.request.makefile().readline()
430
687
        logger.debug(u"Protocol version: %r", line)
441
698
        # using OpenPGP certificates.
442
699
        
443
700
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
444
 
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
445
 
        #                "+DHE-DSS"))
446
 
        priority = "NORMAL"             # Fallback default, since this
447
 
                                        # MUST be set.
448
 
        if self.server.settings["priority"]:
449
 
            priority = self.server.settings["priority"]
450
 
        gnutls.library.functions.gnutls_priority_set_direct\
451
 
            (session._c_object, priority, None);
 
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))
452
708
        
453
709
        try:
454
710
            session.handshake()
457
713
            # Do not run session.bye() here: the session is not
458
714
            # established.  Just abandon the request.
459
715
            return
 
716
        logger.debug(u"Handshake succeeded")
460
717
        try:
461
718
            fpr = fingerprint(peer_certificate(session))
462
719
        except (TypeError, gnutls.errors.GNUTLSError), error:
464
721
            session.bye()
465
722
            return
466
723
        logger.debug(u"Fingerprint: %s", fpr)
467
 
        client = None
 
724
        
468
725
        for c in self.server.clients:
469
726
            if c.fingerprint == fpr:
470
727
                client = c
471
728
                break
472
 
        if not client:
 
729
        else:
473
730
            logger.warning(u"Client not found for fingerprint: %s",
474
731
                           fpr)
475
732
            session.bye()
482
739
                           vars(client))
483
740
            session.bye()
484
741
            return
 
742
        ## This won't work here, since we're in a fork.
 
743
        # client.checked_ok()
485
744
        sent_size = 0
486
745
        while sent_size < len(client.secret):
487
746
            sent = session.send(client.secret[sent_size:])
492
751
        session.bye()
493
752
 
494
753
 
495
 
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
496
 
    """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
497
757
    Attributes:
498
758
        settings:       Server settings
499
759
        clients:        Set() of Client objects
 
760
        enabled:        Boolean; whether this server is activated yet
500
761
    """
501
762
    address_family = socket.AF_INET6
502
763
    def __init__(self, *args, **kwargs):
506
767
        if "clients" in kwargs:
507
768
            self.clients = kwargs["clients"]
508
769
            del kwargs["clients"]
509
 
        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)
510
776
    def server_bind(self):
511
777
        """This overrides the normal server_bind() function
512
778
        to bind to an interface if one was specified, and also NOT to
524
790
                                 u" bind to interface %s",
525
791
                                 self.settings["interface"])
526
792
                else:
527
 
                    raise error
 
793
                    raise
528
794
        # Only bind(2) the socket if we really need to.
529
795
        if self.server_address[0] or self.server_address[1]:
530
796
            if not self.server_address[0]:
531
 
                in6addr_any = "::"
532
 
                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,
533
802
                                       self.server_address[1])
534
803
            elif not self.server_address[1]:
535
804
                self.server_address = (self.server_address[0],
541
810
#                                            if_nametoindex
542
811
#                                            (self.settings
543
812
#                                             ["interface"]))
544
 
            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
545
819
 
546
820
 
547
821
def string_to_delta(interval):
548
822
    """Parse a string and return a datetime.timedelta
549
 
 
 
823
    
550
824
    >>> string_to_delta('7d')
551
825
    datetime.timedelta(7)
552
826
    >>> string_to_delta('60s')
557
831
    datetime.timedelta(1)
558
832
    >>> string_to_delta(u'1w')
559
833
    datetime.timedelta(7)
 
834
    >>> string_to_delta('5m 30s')
 
835
    datetime.timedelta(0, 330)
560
836
    """
561
 
    try:
562
 
        suffix=unicode(interval[-1])
563
 
        value=int(interval[:-1])
564
 
        if suffix == u"d":
565
 
            delta = datetime.timedelta(value)
566
 
        elif suffix == u"s":
567
 
            delta = datetime.timedelta(0, value)
568
 
        elif suffix == u"m":
569
 
            delta = datetime.timedelta(0, 0, 0, 0, value)
570
 
        elif suffix == u"h":
571
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
572
 
        elif suffix == u"w":
573
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
574
 
        else:
 
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):
575
855
            raise ValueError
576
 
    except (ValueError, IndexError):
577
 
        raise ValueError
578
 
    return delta
 
856
        timevalue += delta
 
857
    return timevalue
579
858
 
580
859
 
581
860
def server_state_changed(state):
582
861
    """Derived from the Avahi example code"""
583
862
    if state == avahi.SERVER_COLLISION:
584
 
        logger.error(u"Server name collision")
 
863
        logger.error(u"Zeroconf server name collision")
585
864
        service.remove()
586
865
    elif state == avahi.SERVER_RUNNING:
587
866
        service.add()
589
868
 
590
869
def entry_group_state_changed(state, error):
591
870
    """Derived from the Avahi example code"""
592
 
    logger.debug(u"state change: %i", state)
 
871
    logger.debug(u"Avahi state change: %i", state)
593
872
    
594
873
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
595
 
        logger.debug(u"Service established.")
 
874
        logger.debug(u"Zeroconf service established.")
596
875
    elif state == avahi.ENTRY_GROUP_COLLISION:
597
 
        logger.warning(u"Service name collision.")
 
876
        logger.warning(u"Zeroconf service name collision.")
598
877
        service.rename()
599
878
    elif state == avahi.ENTRY_GROUP_FAILURE:
600
 
        logger.critical(u"Error in group state changed %s",
 
879
        logger.critical(u"Avahi: Error in group state changed %s",
601
880
                        unicode(error))
602
 
        raise AvahiGroupError("State changed: %s", str(error))
 
881
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
603
882
 
604
883
def if_nametoindex(interface):
605
884
    """Call the C function if_nametoindex(), or equivalent"""
606
885
    global if_nametoindex
607
886
    try:
608
 
        if "ctypes.util" not in sys.modules:
609
 
            import ctypes.util
610
 
        if_nametoindex = ctypes.cdll.LoadLibrary\
611
 
            (ctypes.util.find_library("c")).if_nametoindex
 
887
        if_nametoindex = (ctypes.cdll.LoadLibrary
 
888
                          (ctypes.util.find_library("c"))
 
889
                          .if_nametoindex)
612
890
    except (OSError, AttributeError):
613
891
        if "struct" not in sys.modules:
614
892
            import struct
617
895
        def if_nametoindex(interface):
618
896
            "Get an interface index the hard way, i.e. using fcntl()"
619
897
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
620
 
            s = socket.socket()
621
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
622
 
                                struct.pack("16s16x", interface))
623
 
            s.close()
 
898
            with closing(socket.socket()) as s:
 
899
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
900
                                    struct.pack("16s16x", interface))
624
901
            interface_index = struct.unpack("I", ifreq[16:20])[0]
625
902
            return interface_index
626
903
    return if_nametoindex(interface)
650
927
 
651
928
 
652
929
def main():
653
 
    global main_loop_started
654
 
    main_loop_started = False
655
 
    
656
 
    parser = OptionParser()
 
930
    parser = optparse.OptionParser(version = "%%prog %s" % version)
657
931
    parser.add_option("-i", "--interface", type="string",
658
932
                      metavar="IF", help="Bind to interface IF")
659
933
    parser.add_option("-a", "--address", type="string",
660
934
                      help="Address to listen for requests on")
661
935
    parser.add_option("-p", "--port", type="int",
662
936
                      help="Port number to receive requests on")
663
 
    parser.add_option("--check", action="store_true", default=False,
 
937
    parser.add_option("--check", action="store_true",
664
938
                      help="Run self-test")
665
939
    parser.add_option("--debug", action="store_true",
666
940
                      help="Debug mode; run in foreground and log to"
673
947
                      default="/etc/mandos", metavar="DIR",
674
948
                      help="Directory to search for configuration"
675
949
                      " files")
676
 
    (options, args) = parser.parse_args()
 
950
    parser.add_option("--no-dbus", action="store_false",
 
951
                      dest="use_dbus",
 
952
                      help=optparse.SUPPRESS_HELP) # XXX: Not done yet
 
953
    parser.add_option("--no-ipv6", action="store_false",
 
954
                      dest="use_ipv6", help="Do not use IPv6")
 
955
    options = parser.parse_args()[0]
677
956
    
678
957
    if options.check:
679
958
        import doctest
688
967
                        "priority":
689
968
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
690
969
                        "servicename": "Mandos",
 
970
                        "use_dbus": "True",
 
971
                        "use_ipv6": "True",
691
972
                        }
692
973
    
693
974
    # Parse config file for server-global settings
694
975
    server_config = ConfigParser.SafeConfigParser(server_defaults)
695
976
    del server_defaults
696
977
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
697
 
    server_section = "server"
698
978
    # Convert the SafeConfigParser object to a dict
699
 
    server_settings = dict(server_config.items(server_section))
700
 
    # Use getboolean on the boolean config option
701
 
    server_settings["debug"] = server_config.getboolean\
702
 
                               (server_section, "debug")
 
979
    server_settings = server_config.defaults()
 
980
    # Use the appropriate methods on the non-string config options
 
981
    server_settings["debug"] = server_config.getboolean("DEFAULT",
 
982
                                                        "debug")
 
983
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
 
984
                                                           "use_dbus")
 
985
    server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
 
986
                                                           "use_ipv6")
 
987
    if server_settings["port"]:
 
988
        server_settings["port"] = server_config.getint("DEFAULT",
 
989
                                                       "port")
703
990
    del server_config
704
991
    
705
992
    # Override the settings from the config file with command line
706
993
    # options, if set.
707
994
    for option in ("interface", "address", "port", "debug",
708
 
                   "priority", "servicename", "configdir"):
 
995
                   "priority", "servicename", "configdir",
 
996
                   "use_dbus", "use_ipv6"):
709
997
        value = getattr(options, option)
710
998
        if value is not None:
711
999
            server_settings[option] = value
712
1000
    del options
713
1001
    # Now we have our good server settings in "server_settings"
714
1002
    
 
1003
    # For convenience
715
1004
    debug = server_settings["debug"]
 
1005
    use_dbus = server_settings["use_dbus"]
 
1006
    use_dbus = False            # XXX: Not done yet
 
1007
    use_ipv6 = server_settings["use_ipv6"]
716
1008
    
717
1009
    if not debug:
718
1010
        syslogger.setLevel(logging.WARNING)
 
1011
        console.setLevel(logging.WARNING)
719
1012
    
720
1013
    if server_settings["servicename"] != "Mandos":
721
 
        syslogger.setFormatter(logging.Formatter\
 
1014
        syslogger.setFormatter(logging.Formatter
722
1015
                               ('Mandos (%s): %%(levelname)s:'
723
1016
                                ' %%(message)s'
724
1017
                                % server_settings["servicename"]))
727
1020
    client_defaults = { "timeout": "1h",
728
1021
                        "interval": "5m",
729
1022
                        "checker": "fping -q -- %%(host)s",
 
1023
                        "host": "",
730
1024
                        }
731
1025
    client_config = ConfigParser.SafeConfigParser(client_defaults)
732
1026
    client_config.read(os.path.join(server_settings["configdir"],
733
1027
                                    "clients.conf"))
734
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
    
735
1075
    global service
 
1076
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
736
1077
    service = AvahiService(name = server_settings["servicename"],
737
 
                           type = "_mandos._tcp", );
 
1078
                           servicetype = "_mandos._tcp",
 
1079
                           protocol = protocol)
738
1080
    if server_settings["interface"]:
739
 
        service.interface = if_nametoindex(server_settings["interface"])
 
1081
        service.interface = (if_nametoindex
 
1082
                             (server_settings["interface"]))
740
1083
    
741
1084
    global main_loop
742
1085
    global bus
745
1088
    DBusGMainLoop(set_as_default=True )
746
1089
    main_loop = gobject.MainLoop()
747
1090
    bus = dbus.SystemBus()
748
 
    server = dbus.Interface(
749
 
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
750
 
            avahi.DBUS_INTERFACE_SERVER )
 
1091
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
1092
                                           avahi.DBUS_PATH_SERVER),
 
1093
                            avahi.DBUS_INTERFACE_SERVER)
751
1094
    # End of Avahi example code
752
 
    
753
 
    if debug:
754
 
        console = logging.StreamHandler()
755
 
        # console.setLevel(logging.DEBUG)
756
 
        console.setFormatter(logging.Formatter\
757
 
                             ('%(levelname)s: %(message)s'))
758
 
        logger.addHandler(console)
759
 
        del console
760
 
    
761
 
    clients = Set()
762
 
    def remove_from_clients(client):
763
 
        clients.remove(client)
764
 
        if not clients:
765
 
            logger.critical(u"No clients left, exiting")
766
 
            sys.exit()
 
1095
    if use_dbus:
 
1096
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
767
1097
    
768
1098
    clients.update(Set(Client(name = section,
769
 
                              stop_hook = remove_from_clients,
770
1099
                              config
771
 
                              = dict(client_config.items(section)))
 
1100
                              = dict(client_config.items(section)),
 
1101
                              use_dbus = use_dbus)
772
1102
                       for section in client_config.sections()))
773
1103
    if not clients:
774
 
        logger.critical(u"No clients defined")
775
 
        sys.exit(1)
 
1104
        logger.warning(u"No clients defined")
776
1105
    
777
 
    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.
778
1116
        daemon()
779
1117
    
780
 
    pidfilename = "/var/run/mandos/mandos.pid"
781
 
    pid = os.getpid()
782
1118
    try:
783
 
        pidfile = open(pidfilename, "w")
 
1119
        pid = os.getpid()
784
1120
        pidfile.write(str(pid) + "\n")
785
1121
        pidfile.close()
786
1122
        del pidfile
787
 
    except IOError, err:
788
 
        logger.error(u"Could not write %s file with PID %d",
789
 
                     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
790
1130
    
791
1131
    def cleanup():
792
1132
        "Cleanup function; run on exit"
799
1139
        
800
1140
        while clients:
801
1141
            client = clients.pop()
802
 
            client.stop_hook = None
803
 
            client.stop()
 
1142
            client.disable_hook = None
 
1143
            client.disable()
804
1144
    
805
1145
    atexit.register(cleanup)
806
1146
    
809
1149
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
810
1150
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
811
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
    
812
1200
    for client in clients:
813
 
        client.start()
814
 
    
815
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
816
 
                                 server_settings["port"]),
817
 
                                tcp_handler,
818
 
                                settings=server_settings,
819
 
                                clients=clients)
 
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
    
820
1210
    # Find out what port we got
821
1211
    service.port = tcp_server.socket.getsockname()[1]
822
 
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
823
 
                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())
824
1219
    
825
1220
    #service.interface = tcp_server.socket.getsockname()[3]
826
1221
    
836
1231
        
837
1232
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
838
1233
                             lambda *args, **kwargs:
839
 
                             tcp_server.handle_request\
840
 
                             (*args[2:], **kwargs) or True)
 
1234
                             (tcp_server.handle_request
 
1235
                              (*args[2:], **kwargs) or True))
841
1236
        
842
1237
        logger.debug(u"Starting main loop")
843
 
        main_loop_started = True
844
1238
        main_loop.run()
845
1239
    except AvahiError, error:
846
 
        logger.critical(u"AvahiError: %s" + unicode(error))
 
1240
        logger.critical(u"AvahiError: %s", error)
847
1241
        sys.exit(1)
848
1242
    except KeyboardInterrupt:
849
1243
        if debug:
850
 
            print
 
1244
            print >> sys.stderr
 
1245
        logger.debug("Server received KeyboardInterrupt")
 
1246
    logger.debug("Server exiting")
851
1247
 
852
1248
if __name__ == '__main__':
853
1249
    main()