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mandos
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6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add" and "remove" in the "AvahiService" class, the
10
 
# "server_state_changed" and "entry_group_state_changed" functions,
11
 
# and some lines in "main".
 
9
# methods "add", "remove", "server_state_changed",
 
10
# "entry_group_state_changed", "cleanup", and "activate" in the
 
11
# "AvahiService" class, and some lines in "main".
12
12
# 
13
13
# Everything else is
14
14
# Copyright © 2008,2009 Teddy Hogeborn
33
33
 
34
34
from __future__ import division, with_statement, absolute_import
35
35
 
36
 
import SocketServer
 
36
import SocketServer as socketserver
37
37
import socket
38
 
from optparse import OptionParser
 
38
import optparse
39
39
import datetime
40
40
import errno
41
41
import gnutls.crypto
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
 
import ConfigParser
 
47
import ConfigParser as configparser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
 
from sets import Set
53
52
import subprocess
54
53
import atexit
55
54
import stat
57
56
import logging.handlers
58
57
import pwd
59
58
from contextlib import closing
 
59
import struct
 
60
import fcntl
 
61
import functools
60
62
 
61
63
import dbus
62
64
import dbus.service
66
68
import ctypes
67
69
import ctypes.util
68
70
 
69
 
version = "1.0.2"
70
 
 
71
 
logger = logging.Logger('mandos')
 
71
try:
 
72
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
 
73
except AttributeError:
 
74
    try:
 
75
        from IN import SO_BINDTODEVICE
 
76
    except ImportError:
 
77
        SO_BINDTODEVICE = None
 
78
 
 
79
 
 
80
version = "1.0.11"
 
81
 
 
82
logger = logging.Logger(u'mandos')
72
83
syslogger = (logging.handlers.SysLogHandler
73
84
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
85
              address = "/dev/log"))
75
86
syslogger.setFormatter(logging.Formatter
76
 
                       ('Mandos: %(levelname)s: %(message)s'))
 
87
                       (u'Mandos [%(process)d]: %(levelname)s:'
 
88
                        u' %(message)s'))
77
89
logger.addHandler(syslogger)
78
90
 
79
91
console = logging.StreamHandler()
80
 
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
 
                                       ' %(message)s'))
 
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
 
93
                                       u' %(levelname)s:'
 
94
                                       u' %(message)s'))
82
95
logger.addHandler(console)
83
96
 
84
97
class AvahiError(Exception):
97
110
 
98
111
class AvahiService(object):
99
112
    """An Avahi (Zeroconf) service.
 
113
    
100
114
    Attributes:
101
115
    interface: integer; avahi.IF_UNSPEC or an interface index.
102
116
               Used to optionally bind to the specified interface.
103
 
    name: string; Example: 'Mandos'
104
 
    type: string; Example: '_mandos._tcp'.
 
117
    name: string; Example: u'Mandos'
 
118
    type: string; Example: u'_mandos._tcp'.
105
119
                  See <http://www.dns-sd.org/ServiceTypes.html>
106
120
    port: integer; what port to announce
107
121
    TXT: list of strings; TXT record for the service
110
124
    max_renames: integer; maximum number of renames
111
125
    rename_count: integer; counter so we only rename after collisions
112
126
                  a sensible number of times
 
127
    group: D-Bus Entry Group
 
128
    server: D-Bus Server
 
129
    bus: dbus.SystemBus()
113
130
    """
114
131
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
132
                 servicetype = None, port = None, TXT = None,
116
 
                 domain = "", host = "", max_renames = 32768):
 
133
                 domain = u"", host = u"", max_renames = 32768,
 
134
                 protocol = avahi.PROTO_UNSPEC, bus = None):
117
135
        self.interface = interface
118
136
        self.name = name
119
137
        self.type = servicetype
123
141
        self.host = host
124
142
        self.rename_count = 0
125
143
        self.max_renames = max_renames
 
144
        self.protocol = protocol
 
145
        self.group = None       # our entry group
 
146
        self.server = None
 
147
        self.bus = bus
126
148
    def rename(self):
127
149
        """Derived from the Avahi example code"""
128
150
        if self.rename_count >= self.max_renames:
130
152
                            u" after %i retries, exiting.",
131
153
                            self.rename_count)
132
154
            raise AvahiServiceError(u"Too many renames")
133
 
        self.name = server.GetAlternativeServiceName(self.name)
 
155
        self.name = self.server.GetAlternativeServiceName(self.name)
134
156
        logger.info(u"Changing Zeroconf service name to %r ...",
135
 
                    str(self.name))
 
157
                    unicode(self.name))
136
158
        syslogger.setFormatter(logging.Formatter
137
 
                               ('Mandos (%s): %%(levelname)s:'
138
 
                                ' %%(message)s' % self.name))
 
159
                               (u'Mandos (%s) [%%(process)d]:'
 
160
                                u' %%(levelname)s: %%(message)s'
 
161
                                % self.name))
139
162
        self.remove()
140
163
        self.add()
141
164
        self.rename_count += 1
142
165
    def remove(self):
143
166
        """Derived from the Avahi example code"""
144
 
        if group is not None:
145
 
            group.Reset()
 
167
        if self.group is not None:
 
168
            self.group.Reset()
146
169
    def add(self):
147
170
        """Derived from the Avahi example code"""
148
 
        global group
149
 
        if group is None:
150
 
            group = dbus.Interface(bus.get_object
151
 
                                   (avahi.DBUS_NAME,
152
 
                                    server.EntryGroupNew()),
153
 
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
 
            group.connect_to_signal('StateChanged',
155
 
                                    entry_group_state_changed)
 
171
        if self.group is None:
 
172
            self.group = dbus.Interface(
 
173
                self.bus.get_object(avahi.DBUS_NAME,
 
174
                                    self.server.EntryGroupNew()),
 
175
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
176
            self.group.connect_to_signal('StateChanged',
 
177
                                         self.entry_group_state_changed)
156
178
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
 
                     service.name, service.type)
158
 
        group.AddService(
159
 
                self.interface,         # interface
160
 
                avahi.PROTO_INET6,      # protocol
161
 
                dbus.UInt32(0),         # flags
162
 
                self.name, self.type,
163
 
                self.domain, self.host,
164
 
                dbus.UInt16(self.port),
165
 
                avahi.string_array_to_txt_array(self.TXT))
166
 
        group.Commit()
167
 
 
168
 
# From the Avahi example code:
169
 
group = None                            # our entry group
170
 
# End of Avahi example code
171
 
 
172
 
 
173
 
def _datetime_to_dbus(dt, variant_level=0):
174
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
175
 
    return dbus.String(dt.isoformat(), variant_level=variant_level)
176
 
 
177
 
 
178
 
class Client(dbus.service.Object):
 
179
                     self.name, self.type)
 
180
        self.group.AddService(
 
181
            self.interface,
 
182
            self.protocol,
 
183
            dbus.UInt32(0),     # flags
 
184
            self.name, self.type,
 
185
            self.domain, self.host,
 
186
            dbus.UInt16(self.port),
 
187
            avahi.string_array_to_txt_array(self.TXT))
 
188
        self.group.Commit()
 
189
    def entry_group_state_changed(self, state, error):
 
190
        """Derived from the Avahi example code"""
 
191
        logger.debug(u"Avahi state change: %i", state)
 
192
        
 
193
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
194
            logger.debug(u"Zeroconf service established.")
 
195
        elif state == avahi.ENTRY_GROUP_COLLISION:
 
196
            logger.warning(u"Zeroconf service name collision.")
 
197
            self.rename()
 
198
        elif state == avahi.ENTRY_GROUP_FAILURE:
 
199
            logger.critical(u"Avahi: Error in group state changed %s",
 
200
                            unicode(error))
 
201
            raise AvahiGroupError(u"State changed: %s"
 
202
                                  % unicode(error))
 
203
    def cleanup(self):
 
204
        """Derived from the Avahi example code"""
 
205
        if self.group is not None:
 
206
            self.group.Free()
 
207
            self.group = None
 
208
    def server_state_changed(self, state):
 
209
        """Derived from the Avahi example code"""
 
210
        if state == avahi.SERVER_COLLISION:
 
211
            logger.error(u"Zeroconf server name collision")
 
212
            self.remove()
 
213
        elif state == avahi.SERVER_RUNNING:
 
214
            self.add()
 
215
    def activate(self):
 
216
        """Derived from the Avahi example code"""
 
217
        if self.server is None:
 
218
            self.server = dbus.Interface(
 
219
                self.bus.get_object(avahi.DBUS_NAME,
 
220
                                    avahi.DBUS_PATH_SERVER),
 
221
                avahi.DBUS_INTERFACE_SERVER)
 
222
        self.server.connect_to_signal(u"StateChanged",
 
223
                                 self.server_state_changed)
 
224
        self.server_state_changed(self.server.GetState())
 
225
 
 
226
 
 
227
class Client(object):
179
228
    """A representation of a client host served by this server.
 
229
    
180
230
    Attributes:
181
 
    name:       string; from the config file, used in log messages
 
231
    name:       string; from the config file, used in log messages and
 
232
                        D-Bus identifiers
182
233
    fingerprint: string (40 or 32 hexadecimal digits); used to
183
234
                 uniquely identify the client
184
235
    secret:     bytestring; sent verbatim (over TLS) to client
201
252
                     client lives.  %() expansions are done at
202
253
                     runtime with vars(self) as dict, so that for
203
254
                     instance %(name)s can be used in the command.
204
 
    use_dbus: bool(); Whether to provide D-Bus interface and signals
205
 
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
 
255
    current_checker_command: string; current running checker_command
206
256
    """
 
257
    
 
258
    @staticmethod
 
259
    def _datetime_to_milliseconds(dt):
 
260
        "Convert a datetime.datetime() to milliseconds"
 
261
        return ((dt.days * 24 * 60 * 60 * 1000)
 
262
                + (dt.seconds * 1000)
 
263
                + (dt.microseconds // 1000))
 
264
    
207
265
    def timeout_milliseconds(self):
208
266
        "Return the 'timeout' attribute in milliseconds"
209
 
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
210
 
                + (self.timeout.seconds * 1000)
211
 
                + (self.timeout.microseconds // 1000))
 
267
        return self._datetime_to_milliseconds(self.timeout)
212
268
    
213
269
    def interval_milliseconds(self):
214
270
        "Return the 'interval' attribute in milliseconds"
215
 
        return ((self.interval.days * 24 * 60 * 60 * 1000)
216
 
                + (self.interval.seconds * 1000)
217
 
                + (self.interval.microseconds // 1000))
 
271
        return self._datetime_to_milliseconds(self.interval)
218
272
    
219
 
    def __init__(self, name = None, disable_hook=None, config=None,
220
 
                 use_dbus=True):
 
273
    def __init__(self, name = None, disable_hook=None, config=None):
221
274
        """Note: the 'checker' key in 'config' sets the
222
275
        'checker_command' attribute and *not* the 'checker'
223
276
        attribute."""
225
278
        if config is None:
226
279
            config = {}
227
280
        logger.debug(u"Creating client %r", self.name)
228
 
        self.use_dbus = use_dbus
229
 
        if self.use_dbus:
230
 
            self.dbus_object_path = (dbus.ObjectPath
231
 
                                     ("/Mandos/clients/"
232
 
                                      + self.name.replace(".", "_")))
233
 
            dbus.service.Object.__init__(self, bus,
234
 
                                         self.dbus_object_path)
235
281
        # Uppercase and remove spaces from fingerprint for later
236
282
        # comparison purposes with return value from the fingerprint()
237
283
        # function
238
 
        self.fingerprint = (config["fingerprint"].upper()
 
284
        self.fingerprint = (config[u"fingerprint"].upper()
239
285
                            .replace(u" ", u""))
240
286
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
241
 
        if "secret" in config:
242
 
            self.secret = config["secret"].decode(u"base64")
243
 
        elif "secfile" in config:
 
287
        if u"secret" in config:
 
288
            self.secret = config[u"secret"].decode(u"base64")
 
289
        elif u"secfile" in config:
244
290
            with closing(open(os.path.expanduser
245
291
                              (os.path.expandvars
246
 
                               (config["secfile"])))) as secfile:
 
292
                               (config[u"secfile"])))) as secfile:
247
293
                self.secret = secfile.read()
248
294
        else:
249
295
            raise TypeError(u"No secret or secfile for client %s"
250
296
                            % self.name)
251
 
        self.host = config.get("host", "")
 
297
        self.host = config.get(u"host", u"")
252
298
        self.created = datetime.datetime.utcnow()
253
299
        self.enabled = False
254
300
        self.last_enabled = None
255
301
        self.last_checked_ok = None
256
 
        self.timeout = string_to_delta(config["timeout"])
257
 
        self.interval = string_to_delta(config["interval"])
 
302
        self.timeout = string_to_delta(config[u"timeout"])
 
303
        self.interval = string_to_delta(config[u"interval"])
258
304
        self.disable_hook = disable_hook
259
305
        self.checker = None
260
306
        self.checker_initiator_tag = None
261
307
        self.disable_initiator_tag = None
262
308
        self.checker_callback_tag = None
263
 
        self.checker_command = config["checker"]
 
309
        self.checker_command = config[u"checker"]
 
310
        self.current_checker_command = None
 
311
        self.last_connect = None
264
312
    
265
313
    def enable(self):
266
314
        """Start this client's checker and timeout hooks"""
 
315
        if getattr(self, u"enabled", False):
 
316
            # Already enabled
 
317
            return
267
318
        self.last_enabled = datetime.datetime.utcnow()
268
319
        # Schedule a new checker to be started an 'interval' from now,
269
320
        # and every interval from then on.
277
328
                                   (self.timeout_milliseconds(),
278
329
                                    self.disable))
279
330
        self.enabled = True
280
 
        if self.use_dbus:
281
 
            # Emit D-Bus signals
282
 
            self.PropertyChanged(dbus.String(u"enabled"),
283
 
                                 dbus.Boolean(True, variant_level=1))
284
 
            self.PropertyChanged(dbus.String(u"last_enabled"),
285
 
                                 (_datetime_to_dbus(self.last_enabled,
286
 
                                                    variant_level=1)))
287
331
    
288
332
    def disable(self):
289
333
        """Disable this client."""
290
334
        if not getattr(self, "enabled", False):
291
335
            return False
292
336
        logger.info(u"Disabling client %s", self.name)
293
 
        if getattr(self, "disable_initiator_tag", False):
 
337
        if getattr(self, u"disable_initiator_tag", False):
294
338
            gobject.source_remove(self.disable_initiator_tag)
295
339
            self.disable_initiator_tag = None
296
 
        if getattr(self, "checker_initiator_tag", False):
 
340
        if getattr(self, u"checker_initiator_tag", False):
297
341
            gobject.source_remove(self.checker_initiator_tag)
298
342
            self.checker_initiator_tag = None
299
343
        self.stop_checker()
300
344
        if self.disable_hook:
301
345
            self.disable_hook(self)
302
346
        self.enabled = False
303
 
        if self.use_dbus:
304
 
            # Emit D-Bus signal
305
 
            self.PropertyChanged(dbus.String(u"enabled"),
306
 
                                 dbus.Boolean(False, variant_level=1))
307
347
        # Do not run this again if called by a gobject.timeout_add
308
348
        return False
309
349
    
315
355
        """The checker has completed, so take appropriate actions."""
316
356
        self.checker_callback_tag = None
317
357
        self.checker = None
318
 
        if self.use_dbus:
319
 
            # Emit D-Bus signal
320
 
            self.PropertyChanged(dbus.String(u"checker_running"),
321
 
                                 dbus.Boolean(False, variant_level=1))
322
 
        if (os.WIFEXITED(condition)
323
 
            and (os.WEXITSTATUS(condition) == 0)):
324
 
            logger.info(u"Checker for %(name)s succeeded",
325
 
                        vars(self))
326
 
            if self.use_dbus:
327
 
                # Emit D-Bus signal
328
 
                self.CheckerCompleted(dbus.Boolean(True),
329
 
                                      dbus.UInt16(condition),
330
 
                                      dbus.String(command))
331
 
            self.bump_timeout()
332
 
        elif not os.WIFEXITED(condition):
 
358
        if os.WIFEXITED(condition):
 
359
            exitstatus = os.WEXITSTATUS(condition)
 
360
            if exitstatus == 0:
 
361
                logger.info(u"Checker for %(name)s succeeded",
 
362
                            vars(self))
 
363
                self.checked_ok()
 
364
            else:
 
365
                logger.info(u"Checker for %(name)s failed",
 
366
                            vars(self))
 
367
        else:
333
368
            logger.warning(u"Checker for %(name)s crashed?",
334
369
                           vars(self))
335
 
            if self.use_dbus:
336
 
                # Emit D-Bus signal
337
 
                self.CheckerCompleted(dbus.Boolean(False),
338
 
                                      dbus.UInt16(condition),
339
 
                                      dbus.String(command))
340
 
        else:
341
 
            logger.info(u"Checker for %(name)s failed",
342
 
                        vars(self))
343
 
            if self.use_dbus:
344
 
                # Emit D-Bus signal
345
 
                self.CheckerCompleted(dbus.Boolean(False),
346
 
                                      dbus.UInt16(condition),
347
 
                                      dbus.String(command))
348
370
    
349
 
    def bump_timeout(self):
 
371
    def checked_ok(self):
350
372
        """Bump up the timeout for this client.
 
373
        
351
374
        This should only be called when the client has been seen,
352
375
        alive and well.
353
376
        """
356
379
        self.disable_initiator_tag = (gobject.timeout_add
357
380
                                      (self.timeout_milliseconds(),
358
381
                                       self.disable))
359
 
        if self.use_dbus:
360
 
            # Emit D-Bus signal
361
 
            self.PropertyChanged(
362
 
                dbus.String(u"last_checked_ok"),
363
 
                (_datetime_to_dbus(self.last_checked_ok,
364
 
                                   variant_level=1)))
365
382
    
366
383
    def start_checker(self):
367
384
        """Start a new checker subprocess if one is not running.
 
385
        
368
386
        If a checker already exists, leave it running and do
369
387
        nothing."""
370
388
        # The reason for not killing a running checker is that if we
375
393
        # checkers alone, the checker would have to take more time
376
394
        # than 'timeout' for the client to be declared invalid, which
377
395
        # is as it should be.
 
396
        
 
397
        # If a checker exists, make sure it is not a zombie
 
398
        if self.checker is not None:
 
399
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
400
            if pid:
 
401
                logger.warning(u"Checker was a zombie")
 
402
                gobject.source_remove(self.checker_callback_tag)
 
403
                self.checker_callback(pid, status,
 
404
                                      self.current_checker_command)
 
405
        # Start a new checker if needed
378
406
        if self.checker is None:
379
407
            try:
380
408
                # In case checker_command has exactly one % operator
381
409
                command = self.checker_command % self.host
382
410
            except TypeError:
383
411
                # Escape attributes for the shell
384
 
                escaped_attrs = dict((key, re.escape(str(val)))
 
412
                escaped_attrs = dict((key,
 
413
                                      re.escape(unicode(str(val),
 
414
                                                        errors=
 
415
                                                        u'replace')))
385
416
                                     for key, val in
386
417
                                     vars(self).iteritems())
387
418
                try:
390
421
                    logger.error(u'Could not format string "%s":'
391
422
                                 u' %s', self.checker_command, error)
392
423
                    return True # Try again later
 
424
            self.current_checker_command = command
393
425
            try:
394
426
                logger.info(u"Starting checker %r for %s",
395
427
                            command, self.name)
399
431
                # always replaced by /dev/null.)
400
432
                self.checker = subprocess.Popen(command,
401
433
                                                close_fds=True,
402
 
                                                shell=True, cwd="/")
403
 
                if self.use_dbus:
404
 
                    # Emit D-Bus signal
405
 
                    self.CheckerStarted(command)
406
 
                    self.PropertyChanged(
407
 
                        dbus.String("checker_running"),
408
 
                        dbus.Boolean(True, variant_level=1))
 
434
                                                shell=True, cwd=u"/")
409
435
                self.checker_callback_tag = (gobject.child_watch_add
410
436
                                             (self.checker.pid,
411
437
                                              self.checker_callback,
412
438
                                              data=command))
 
439
                # The checker may have completed before the gobject
 
440
                # watch was added.  Check for this.
 
441
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
442
                if pid:
 
443
                    gobject.source_remove(self.checker_callback_tag)
 
444
                    self.checker_callback(pid, status, command)
413
445
            except OSError, error:
414
446
                logger.error(u"Failed to start subprocess: %s",
415
447
                             error)
421
453
        if self.checker_callback_tag:
422
454
            gobject.source_remove(self.checker_callback_tag)
423
455
            self.checker_callback_tag = None
424
 
        if getattr(self, "checker", None) is None:
 
456
        if getattr(self, u"checker", None) is None:
425
457
            return
426
458
        logger.debug(u"Stopping checker for %(name)s", vars(self))
427
459
        try:
433
465
            if error.errno != errno.ESRCH: # No such process
434
466
                raise
435
467
        self.checker = None
436
 
        if self.use_dbus:
437
 
            self.PropertyChanged(dbus.String(u"checker_running"),
438
 
                                 dbus.Boolean(False, variant_level=1))
439
468
    
440
469
    def still_valid(self):
441
470
        """Has the timeout not yet passed for this client?"""
442
 
        if not getattr(self, "enabled", False):
 
471
        if not getattr(self, u"enabled", False):
443
472
            return False
444
473
        now = datetime.datetime.utcnow()
445
474
        if self.last_checked_ok is None:
446
475
            return now < (self.created + self.timeout)
447
476
        else:
448
477
            return now < (self.last_checked_ok + self.timeout)
 
478
 
 
479
 
 
480
class ClientDBus(Client, dbus.service.Object):
 
481
    """A Client class using D-Bus
 
482
    
 
483
    Attributes:
 
484
    dbus_object_path: dbus.ObjectPath
 
485
    bus: dbus.SystemBus()
 
486
    """
 
487
    # dbus.service.Object doesn't use super(), so we can't either.
 
488
    
 
489
    def __init__(self, bus = None, *args, **kwargs):
 
490
        self.bus = bus
 
491
        Client.__init__(self, *args, **kwargs)
 
492
        # Only now, when this client is initialized, can it show up on
 
493
        # the D-Bus
 
494
        self.dbus_object_path = (dbus.ObjectPath
 
495
                                 (u"/clients/"
 
496
                                  + self.name.replace(u".", u"_")))
 
497
        dbus.service.Object.__init__(self, self.bus,
 
498
                                     self.dbus_object_path)
 
499
    
 
500
    @staticmethod
 
501
    def _datetime_to_dbus(dt, variant_level=0):
 
502
        """Convert a UTC datetime.datetime() to a D-Bus type."""
 
503
        return dbus.String(dt.isoformat(),
 
504
                           variant_level=variant_level)
 
505
    
 
506
    def enable(self):
 
507
        oldstate = getattr(self, u"enabled", False)
 
508
        r = Client.enable(self)
 
509
        if oldstate != self.enabled:
 
510
            # Emit D-Bus signals
 
511
            self.PropertyChanged(dbus.String(u"enabled"),
 
512
                                 dbus.Boolean(True, variant_level=1))
 
513
            self.PropertyChanged(
 
514
                dbus.String(u"last_enabled"),
 
515
                self._datetime_to_dbus(self.last_enabled,
 
516
                                       variant_level=1))
 
517
        return r
 
518
    
 
519
    def disable(self, signal = True):
 
520
        oldstate = getattr(self, u"enabled", False)
 
521
        r = Client.disable(self)
 
522
        if signal and oldstate != self.enabled:
 
523
            # Emit D-Bus signal
 
524
            self.PropertyChanged(dbus.String(u"enabled"),
 
525
                                 dbus.Boolean(False, variant_level=1))
 
526
        return r
 
527
    
 
528
    def __del__(self, *args, **kwargs):
 
529
        try:
 
530
            self.remove_from_connection()
 
531
        except LookupError:
 
532
            pass
 
533
        if hasattr(dbus.service.Object, u"__del__"):
 
534
            dbus.service.Object.__del__(self, *args, **kwargs)
 
535
        Client.__del__(self, *args, **kwargs)
 
536
    
 
537
    def checker_callback(self, pid, condition, command,
 
538
                         *args, **kwargs):
 
539
        self.checker_callback_tag = None
 
540
        self.checker = None
 
541
        # Emit D-Bus signal
 
542
        self.PropertyChanged(dbus.String(u"checker_running"),
 
543
                             dbus.Boolean(False, variant_level=1))
 
544
        if os.WIFEXITED(condition):
 
545
            exitstatus = os.WEXITSTATUS(condition)
 
546
            # Emit D-Bus signal
 
547
            self.CheckerCompleted(dbus.Int16(exitstatus),
 
548
                                  dbus.Int64(condition),
 
549
                                  dbus.String(command))
 
550
        else:
 
551
            # Emit D-Bus signal
 
552
            self.CheckerCompleted(dbus.Int16(-1),
 
553
                                  dbus.Int64(condition),
 
554
                                  dbus.String(command))
 
555
        
 
556
        return Client.checker_callback(self, pid, condition, command,
 
557
                                       *args, **kwargs)
 
558
    
 
559
    def checked_ok(self, *args, **kwargs):
 
560
        r = Client.checked_ok(self, *args, **kwargs)
 
561
        # Emit D-Bus signal
 
562
        self.PropertyChanged(
 
563
            dbus.String(u"last_checked_ok"),
 
564
            (self._datetime_to_dbus(self.last_checked_ok,
 
565
                                    variant_level=1)))
 
566
        return r
 
567
    
 
568
    def start_checker(self, *args, **kwargs):
 
569
        old_checker = self.checker
 
570
        if self.checker is not None:
 
571
            old_checker_pid = self.checker.pid
 
572
        else:
 
573
            old_checker_pid = None
 
574
        r = Client.start_checker(self, *args, **kwargs)
 
575
        # Only if new checker process was started
 
576
        if (self.checker is not None
 
577
            and old_checker_pid != self.checker.pid):
 
578
            # Emit D-Bus signal
 
579
            self.CheckerStarted(self.current_checker_command)
 
580
            self.PropertyChanged(
 
581
                dbus.String(u"checker_running"),
 
582
                dbus.Boolean(True, variant_level=1))
 
583
        return r
 
584
    
 
585
    def stop_checker(self, *args, **kwargs):
 
586
        old_checker = getattr(self, u"checker", None)
 
587
        r = Client.stop_checker(self, *args, **kwargs)
 
588
        if (old_checker is not None
 
589
            and getattr(self, u"checker", None) is None):
 
590
            self.PropertyChanged(dbus.String(u"checker_running"),
 
591
                                 dbus.Boolean(False, variant_level=1))
 
592
        return r
449
593
    
450
594
    ## D-Bus methods & signals
451
 
    _interface = u"org.mandos_system.Mandos.Client"
 
595
    _interface = u"se.bsnet.fukt.Mandos.Client"
452
596
    
453
 
    # BumpTimeout - method
454
 
    BumpTimeout = dbus.service.method(_interface)(bump_timeout)
455
 
    BumpTimeout.__name__ = "BumpTimeout"
 
597
    # CheckedOK - method
 
598
    @dbus.service.method(_interface)
 
599
    def CheckedOK(self):
 
600
        return self.checked_ok()
456
601
    
457
602
    # CheckerCompleted - signal
458
 
    @dbus.service.signal(_interface, signature="bqs")
459
 
    def CheckerCompleted(self, success, condition, command):
 
603
    @dbus.service.signal(_interface, signature=u"nxs")
 
604
    def CheckerCompleted(self, exitcode, waitstatus, command):
460
605
        "D-Bus signal"
461
606
        pass
462
607
    
463
608
    # CheckerStarted - signal
464
 
    @dbus.service.signal(_interface, signature="s")
 
609
    @dbus.service.signal(_interface, signature=u"s")
465
610
    def CheckerStarted(self, command):
466
611
        "D-Bus signal"
467
612
        pass
468
613
    
469
614
    # GetAllProperties - method
470
 
    @dbus.service.method(_interface, out_signature="a{sv}")
 
615
    @dbus.service.method(_interface, out_signature=u"a{sv}")
471
616
    def GetAllProperties(self):
472
617
        "D-Bus method"
473
618
        return dbus.Dictionary({
474
 
                dbus.String("name"):
 
619
                dbus.String(u"name"):
475
620
                    dbus.String(self.name, variant_level=1),
476
 
                dbus.String("fingerprint"):
 
621
                dbus.String(u"fingerprint"):
477
622
                    dbus.String(self.fingerprint, variant_level=1),
478
 
                dbus.String("host"):
 
623
                dbus.String(u"host"):
479
624
                    dbus.String(self.host, variant_level=1),
480
 
                dbus.String("created"):
481
 
                    _datetime_to_dbus(self.created, variant_level=1),
482
 
                dbus.String("last_enabled"):
483
 
                    (_datetime_to_dbus(self.last_enabled,
484
 
                                       variant_level=1)
 
625
                dbus.String(u"created"):
 
626
                    self._datetime_to_dbus(self.created,
 
627
                                           variant_level=1),
 
628
                dbus.String(u"last_enabled"):
 
629
                    (self._datetime_to_dbus(self.last_enabled,
 
630
                                            variant_level=1)
485
631
                     if self.last_enabled is not None
486
632
                     else dbus.Boolean(False, variant_level=1)),
487
 
                dbus.String("enabled"):
 
633
                dbus.String(u"enabled"):
488
634
                    dbus.Boolean(self.enabled, variant_level=1),
489
 
                dbus.String("last_checked_ok"):
490
 
                    (_datetime_to_dbus(self.last_checked_ok,
491
 
                                       variant_level=1)
 
635
                dbus.String(u"last_checked_ok"):
 
636
                    (self._datetime_to_dbus(self.last_checked_ok,
 
637
                                            variant_level=1)
492
638
                     if self.last_checked_ok is not None
493
639
                     else dbus.Boolean (False, variant_level=1)),
494
 
                dbus.String("timeout"):
 
640
                dbus.String(u"timeout"):
495
641
                    dbus.UInt64(self.timeout_milliseconds(),
496
642
                                variant_level=1),
497
 
                dbus.String("interval"):
 
643
                dbus.String(u"interval"):
498
644
                    dbus.UInt64(self.interval_milliseconds(),
499
645
                                variant_level=1),
500
 
                dbus.String("checker"):
 
646
                dbus.String(u"checker"):
501
647
                    dbus.String(self.checker_command,
502
648
                                variant_level=1),
503
 
                dbus.String("checker_running"):
 
649
                dbus.String(u"checker_running"):
504
650
                    dbus.Boolean(self.checker is not None,
505
651
                                 variant_level=1),
506
 
                }, signature="sv")
 
652
                dbus.String(u"object_path"):
 
653
                    dbus.ObjectPath(self.dbus_object_path,
 
654
                                    variant_level=1)
 
655
                }, signature=u"sv")
507
656
    
508
657
    # IsStillValid - method
509
 
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
510
 
                    (still_valid))
511
 
    IsStillValid.__name__ = "IsStillValid"
 
658
    @dbus.service.method(_interface, out_signature=u"b")
 
659
    def IsStillValid(self):
 
660
        return self.still_valid()
512
661
    
513
662
    # PropertyChanged - signal
514
 
    @dbus.service.signal(_interface, signature="sv")
 
663
    @dbus.service.signal(_interface, signature=u"sv")
515
664
    def PropertyChanged(self, property, value):
516
665
        "D-Bus signal"
517
666
        pass
518
667
    
 
668
    # ReceivedSecret - signal
 
669
    @dbus.service.signal(_interface)
 
670
    def ReceivedSecret(self):
 
671
        "D-Bus signal"
 
672
        pass
 
673
    
 
674
    # Rejected - signal
 
675
    @dbus.service.signal(_interface)
 
676
    def Rejected(self):
 
677
        "D-Bus signal"
 
678
        pass
 
679
    
519
680
    # SetChecker - method
520
 
    @dbus.service.method(_interface, in_signature="s")
 
681
    @dbus.service.method(_interface, in_signature=u"s")
521
682
    def SetChecker(self, checker):
522
683
        "D-Bus setter method"
523
684
        self.checker_command = checker
527
688
                                         variant_level=1))
528
689
    
529
690
    # SetHost - method
530
 
    @dbus.service.method(_interface, in_signature="s")
 
691
    @dbus.service.method(_interface, in_signature=u"s")
531
692
    def SetHost(self, host):
532
693
        "D-Bus setter method"
533
694
        self.host = host
536
697
                             dbus.String(self.host, variant_level=1))
537
698
    
538
699
    # SetInterval - method
539
 
    @dbus.service.method(_interface, in_signature="t")
 
700
    @dbus.service.method(_interface, in_signature=u"t")
540
701
    def SetInterval(self, milliseconds):
541
702
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
542
703
        # Emit D-Bus signal
545
706
                                          variant_level=1)))
546
707
    
547
708
    # SetSecret - method
548
 
    @dbus.service.method(_interface, in_signature="ay",
 
709
    @dbus.service.method(_interface, in_signature=u"ay",
549
710
                         byte_arrays=True)
550
711
    def SetSecret(self, secret):
551
712
        "D-Bus setter method"
552
713
        self.secret = str(secret)
553
714
    
554
715
    # SetTimeout - method
555
 
    @dbus.service.method(_interface, in_signature="t")
 
716
    @dbus.service.method(_interface, in_signature=u"t")
556
717
    def SetTimeout(self, milliseconds):
557
718
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
558
719
        # Emit D-Bus signal
561
722
                                          variant_level=1)))
562
723
    
563
724
    # Enable - method
564
 
    Enable = dbus.service.method(_interface)(enable)
565
 
    Enable.__name__ = "Enable"
 
725
    @dbus.service.method(_interface)
 
726
    def Enable(self):
 
727
        "D-Bus method"
 
728
        self.enable()
566
729
    
567
730
    # StartChecker - method
568
731
    @dbus.service.method(_interface)
577
740
        self.disable()
578
741
    
579
742
    # StopChecker - method
580
 
    StopChecker = dbus.service.method(_interface)(stop_checker)
581
 
    StopChecker.__name__ = "StopChecker"
 
743
    @dbus.service.method(_interface)
 
744
    def StopChecker(self):
 
745
        self.stop_checker()
582
746
    
583
747
    del _interface
584
748
 
585
749
 
586
 
def peer_certificate(session):
587
 
    "Return the peer's OpenPGP certificate as a bytestring"
588
 
    # If not an OpenPGP certificate...
589
 
    if (gnutls.library.functions
590
 
        .gnutls_certificate_type_get(session._c_object)
591
 
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
592
 
        # ...do the normal thing
593
 
        return session.peer_certificate
594
 
    list_size = ctypes.c_uint()
595
 
    cert_list = (gnutls.library.functions
596
 
                 .gnutls_certificate_get_peers
597
 
                 (session._c_object, ctypes.byref(list_size)))
598
 
    if list_size.value == 0:
599
 
        return None
600
 
    cert = cert_list[0]
601
 
    return ctypes.string_at(cert.data, cert.size)
602
 
 
603
 
 
604
 
def fingerprint(openpgp):
605
 
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
606
 
    # New GnuTLS "datum" with the OpenPGP public key
607
 
    datum = (gnutls.library.types
608
 
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
609
 
                                         ctypes.POINTER
610
 
                                         (ctypes.c_ubyte)),
611
 
                             ctypes.c_uint(len(openpgp))))
612
 
    # New empty GnuTLS certificate
613
 
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
614
 
    (gnutls.library.functions
615
 
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
616
 
    # Import the OpenPGP public key into the certificate
617
 
    (gnutls.library.functions
618
 
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
619
 
                                gnutls.library.constants
620
 
                                .GNUTLS_OPENPGP_FMT_RAW))
621
 
    # Verify the self signature in the key
622
 
    crtverify = ctypes.c_uint()
623
 
    (gnutls.library.functions
624
 
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
625
 
    if crtverify.value != 0:
626
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
627
 
        raise gnutls.errors.CertificateSecurityError("Verify failed")
628
 
    # New buffer for the fingerprint
629
 
    buf = ctypes.create_string_buffer(20)
630
 
    buf_len = ctypes.c_size_t()
631
 
    # Get the fingerprint from the certificate into the buffer
632
 
    (gnutls.library.functions
633
 
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
634
 
                                         ctypes.byref(buf_len)))
635
 
    # Deinit the certificate
636
 
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
637
 
    # Convert the buffer to a Python bytestring
638
 
    fpr = ctypes.string_at(buf, buf_len.value)
639
 
    # Convert the bytestring to hexadecimal notation
640
 
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
641
 
    return hex_fpr
642
 
 
643
 
 
644
 
class TCP_handler(SocketServer.BaseRequestHandler, object):
645
 
    """A TCP request handler class.
646
 
    Instantiated by IPv6_TCPServer for each request to handle it.
 
750
class ClientHandler(socketserver.BaseRequestHandler, object):
 
751
    """A class to handle client connections.
 
752
    
 
753
    Instantiated once for each connection to handle it.
647
754
    Note: This will run in its own forked process."""
648
755
    
649
756
    def handle(self):
650
757
        logger.info(u"TCP connection from: %s",
651
758
                    unicode(self.client_address))
652
 
        session = (gnutls.connection
653
 
                   .ClientSession(self.request,
654
 
                                  gnutls.connection
655
 
                                  .X509Credentials()))
656
 
        
657
 
        line = self.request.makefile().readline()
658
 
        logger.debug(u"Protocol version: %r", line)
659
 
        try:
660
 
            if int(line.strip().split()[0]) > 1:
661
 
                raise RuntimeError
662
 
        except (ValueError, IndexError, RuntimeError), error:
663
 
            logger.error(u"Unknown protocol version: %s", error)
664
 
            return
665
 
        
666
 
        # Note: gnutls.connection.X509Credentials is really a generic
667
 
        # GnuTLS certificate credentials object so long as no X.509
668
 
        # keys are added to it.  Therefore, we can use it here despite
669
 
        # using OpenPGP certificates.
670
 
        
671
 
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
672
 
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
673
 
        #                "+DHE-DSS"))
674
 
        # Use a fallback default, since this MUST be set.
675
 
        priority = self.server.settings.get("priority", "NORMAL")
676
 
        (gnutls.library.functions
677
 
         .gnutls_priority_set_direct(session._c_object,
678
 
                                     priority, None))
679
 
        
680
 
        try:
681
 
            session.handshake()
682
 
        except gnutls.errors.GNUTLSError, error:
683
 
            logger.warning(u"Handshake failed: %s", error)
684
 
            # Do not run session.bye() here: the session is not
685
 
            # established.  Just abandon the request.
686
 
            return
687
 
        try:
688
 
            fpr = fingerprint(peer_certificate(session))
689
 
        except (TypeError, gnutls.errors.GNUTLSError), error:
690
 
            logger.warning(u"Bad certificate: %s", error)
691
 
            session.bye()
692
 
            return
693
 
        logger.debug(u"Fingerprint: %s", fpr)
694
 
        for c in self.server.clients:
695
 
            if c.fingerprint == fpr:
696
 
                client = c
697
 
                break
698
 
        else:
699
 
            logger.warning(u"Client not found for fingerprint: %s",
700
 
                           fpr)
701
 
            session.bye()
702
 
            return
703
 
        # Have to check if client.still_valid(), since it is possible
704
 
        # that the client timed out while establishing the GnuTLS
705
 
        # session.
706
 
        if not client.still_valid():
707
 
            logger.warning(u"Client %(name)s is invalid",
708
 
                           vars(client))
709
 
            session.bye()
710
 
            return
711
 
        ## This won't work here, since we're in a fork.
712
 
        # client.bump_timeout()
713
 
        sent_size = 0
714
 
        while sent_size < len(client.secret):
715
 
            sent = session.send(client.secret[sent_size:])
716
 
            logger.debug(u"Sent: %d, remaining: %d",
717
 
                         sent, len(client.secret)
718
 
                         - (sent_size + sent))
719
 
            sent_size += sent
720
 
        session.bye()
721
 
 
722
 
 
723
 
class IPv6_TCPServer(SocketServer.ForkingMixIn,
724
 
                     SocketServer.TCPServer, object):
725
 
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
 
759
        logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
 
760
        # Open IPC pipe to parent process
 
761
        with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
 
762
            session = (gnutls.connection
 
763
                       .ClientSession(self.request,
 
764
                                      gnutls.connection
 
765
                                      .X509Credentials()))
 
766
            
 
767
            line = self.request.makefile().readline()
 
768
            logger.debug(u"Protocol version: %r", line)
 
769
            try:
 
770
                if int(line.strip().split()[0]) > 1:
 
771
                    raise RuntimeError
 
772
            except (ValueError, IndexError, RuntimeError), error:
 
773
                logger.error(u"Unknown protocol version: %s", error)
 
774
                return
 
775
            
 
776
            # Note: gnutls.connection.X509Credentials is really a
 
777
            # generic GnuTLS certificate credentials object so long as
 
778
            # no X.509 keys are added to it.  Therefore, we can use it
 
779
            # here despite using OpenPGP certificates.
 
780
            
 
781
            #priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
 
782
            #                      u"+AES-256-CBC", u"+SHA1",
 
783
            #                      u"+COMP-NULL", u"+CTYPE-OPENPGP",
 
784
            #                      u"+DHE-DSS"))
 
785
            # Use a fallback default, since this MUST be set.
 
786
            priority = self.server.gnutls_priority
 
787
            if priority is None:
 
788
                priority = u"NORMAL"
 
789
            (gnutls.library.functions
 
790
             .gnutls_priority_set_direct(session._c_object,
 
791
                                         priority, None))
 
792
            
 
793
            try:
 
794
                session.handshake()
 
795
            except gnutls.errors.GNUTLSError, error:
 
796
                logger.warning(u"Handshake failed: %s", error)
 
797
                # Do not run session.bye() here: the session is not
 
798
                # established.  Just abandon the request.
 
799
                return
 
800
            logger.debug(u"Handshake succeeded")
 
801
            try:
 
802
                fpr = self.fingerprint(self.peer_certificate(session))
 
803
            except (TypeError, gnutls.errors.GNUTLSError), error:
 
804
                logger.warning(u"Bad certificate: %s", error)
 
805
                session.bye()
 
806
                return
 
807
            logger.debug(u"Fingerprint: %s", fpr)
 
808
            
 
809
            for c in self.server.clients:
 
810
                if c.fingerprint == fpr:
 
811
                    client = c
 
812
                    break
 
813
            else:
 
814
                ipc.write(u"NOTFOUND %s %s\n"
 
815
                          % (fpr, unicode(self.client_address)))
 
816
                session.bye()
 
817
                return
 
818
            # Have to check if client.still_valid(), since it is
 
819
            # possible that the client timed out while establishing
 
820
            # the GnuTLS session.
 
821
            if not client.still_valid():
 
822
                ipc.write(u"INVALID %s\n" % client.name)
 
823
                session.bye()
 
824
                return
 
825
            ipc.write(u"SENDING %s\n" % client.name)
 
826
            sent_size = 0
 
827
            while sent_size < len(client.secret):
 
828
                sent = session.send(client.secret[sent_size:])
 
829
                logger.debug(u"Sent: %d, remaining: %d",
 
830
                             sent, len(client.secret)
 
831
                             - (sent_size + sent))
 
832
                sent_size += sent
 
833
            session.bye()
 
834
    
 
835
    @staticmethod
 
836
    def peer_certificate(session):
 
837
        "Return the peer's OpenPGP certificate as a bytestring"
 
838
        # If not an OpenPGP certificate...
 
839
        if (gnutls.library.functions
 
840
            .gnutls_certificate_type_get(session._c_object)
 
841
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
842
            # ...do the normal thing
 
843
            return session.peer_certificate
 
844
        list_size = ctypes.c_uint(1)
 
845
        cert_list = (gnutls.library.functions
 
846
                     .gnutls_certificate_get_peers
 
847
                     (session._c_object, ctypes.byref(list_size)))
 
848
        if not bool(cert_list) and list_size.value != 0:
 
849
            raise gnutls.errors.GNUTLSError(u"error getting peer"
 
850
                                            u" certificate")
 
851
        if list_size.value == 0:
 
852
            return None
 
853
        cert = cert_list[0]
 
854
        return ctypes.string_at(cert.data, cert.size)
 
855
    
 
856
    @staticmethod
 
857
    def fingerprint(openpgp):
 
858
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
 
859
        # New GnuTLS "datum" with the OpenPGP public key
 
860
        datum = (gnutls.library.types
 
861
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
862
                                             ctypes.POINTER
 
863
                                             (ctypes.c_ubyte)),
 
864
                                 ctypes.c_uint(len(openpgp))))
 
865
        # New empty GnuTLS certificate
 
866
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
867
        (gnutls.library.functions
 
868
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
869
        # Import the OpenPGP public key into the certificate
 
870
        (gnutls.library.functions
 
871
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
872
                                    gnutls.library.constants
 
873
                                    .GNUTLS_OPENPGP_FMT_RAW))
 
874
        # Verify the self signature in the key
 
875
        crtverify = ctypes.c_uint()
 
876
        (gnutls.library.functions
 
877
         .gnutls_openpgp_crt_verify_self(crt, 0,
 
878
                                         ctypes.byref(crtverify)))
 
879
        if crtverify.value != 0:
 
880
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
881
            raise (gnutls.errors.CertificateSecurityError
 
882
                   (u"Verify failed"))
 
883
        # New buffer for the fingerprint
 
884
        buf = ctypes.create_string_buffer(20)
 
885
        buf_len = ctypes.c_size_t()
 
886
        # Get the fingerprint from the certificate into the buffer
 
887
        (gnutls.library.functions
 
888
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
889
                                             ctypes.byref(buf_len)))
 
890
        # Deinit the certificate
 
891
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
892
        # Convert the buffer to a Python bytestring
 
893
        fpr = ctypes.string_at(buf, buf_len.value)
 
894
        # Convert the bytestring to hexadecimal notation
 
895
        hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
896
        return hex_fpr
 
897
 
 
898
 
 
899
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
 
900
    """Like socketserver.ForkingMixIn, but also pass a pipe."""
 
901
    def process_request(self, request, client_address):
 
902
        """Overrides and wraps the original process_request().
 
903
        
 
904
        This function creates a new pipe in self.pipe
 
905
        """
 
906
        self.pipe = os.pipe()
 
907
        super(ForkingMixInWithPipe,
 
908
              self).process_request(request, client_address)
 
909
        os.close(self.pipe[1])  # close write end
 
910
        self.add_pipe(self.pipe[0])
 
911
    def add_pipe(self, pipe):
 
912
        """Dummy function; override as necessary"""
 
913
        os.close(pipe)
 
914
 
 
915
 
 
916
class IPv6_TCPServer(ForkingMixInWithPipe,
 
917
                     socketserver.TCPServer, object):
 
918
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
 
919
    
726
920
    Attributes:
727
 
        settings:       Server settings
728
 
        clients:        Set() of Client objects
729
921
        enabled:        Boolean; whether this server is activated yet
 
922
        interface:      None or a network interface name (string)
 
923
        use_ipv6:       Boolean; to use IPv6 or not
730
924
    """
731
 
    address_family = socket.AF_INET6
732
 
    def __init__(self, *args, **kwargs):
733
 
        if "settings" in kwargs:
734
 
            self.settings = kwargs["settings"]
735
 
            del kwargs["settings"]
736
 
        if "clients" in kwargs:
737
 
            self.clients = kwargs["clients"]
738
 
            del kwargs["clients"]
739
 
        self.enabled = False
740
 
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
 
925
    def __init__(self, server_address, RequestHandlerClass,
 
926
                 interface=None, use_ipv6=True):
 
927
        self.interface = interface
 
928
        if use_ipv6:
 
929
            self.address_family = socket.AF_INET6
 
930
        socketserver.TCPServer.__init__(self, server_address,
 
931
                                        RequestHandlerClass)
741
932
    def server_bind(self):
742
933
        """This overrides the normal server_bind() function
743
934
        to bind to an interface if one was specified, and also NOT to
744
935
        bind to an address or port if they were not specified."""
745
 
        if self.settings["interface"]:
746
 
            # 25 is from /usr/include/asm-i486/socket.h
747
 
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
748
 
            try:
749
 
                self.socket.setsockopt(socket.SOL_SOCKET,
750
 
                                       SO_BINDTODEVICE,
751
 
                                       self.settings["interface"])
752
 
            except socket.error, error:
753
 
                if error[0] == errno.EPERM:
754
 
                    logger.error(u"No permission to"
755
 
                                 u" bind to interface %s",
756
 
                                 self.settings["interface"])
757
 
                else:
758
 
                    raise error
 
936
        if self.interface is not None:
 
937
            if SO_BINDTODEVICE is None:
 
938
                logger.error(u"SO_BINDTODEVICE does not exist;"
 
939
                             u" cannot bind to interface %s",
 
940
                             self.interface)
 
941
            else:
 
942
                try:
 
943
                    self.socket.setsockopt(socket.SOL_SOCKET,
 
944
                                           SO_BINDTODEVICE,
 
945
                                           str(self.interface
 
946
                                               + u'\0'))
 
947
                except socket.error, error:
 
948
                    if error[0] == errno.EPERM:
 
949
                        logger.error(u"No permission to"
 
950
                                     u" bind to interface %s",
 
951
                                     self.interface)
 
952
                    elif error[0] == errno.ENOPROTOOPT:
 
953
                        logger.error(u"SO_BINDTODEVICE not available;"
 
954
                                     u" cannot bind to interface %s",
 
955
                                     self.interface)
 
956
                    else:
 
957
                        raise
759
958
        # Only bind(2) the socket if we really need to.
760
959
        if self.server_address[0] or self.server_address[1]:
761
960
            if not self.server_address[0]:
762
 
                in6addr_any = "::"
763
 
                self.server_address = (in6addr_any,
 
961
                if self.address_family == socket.AF_INET6:
 
962
                    any_address = u"::" # in6addr_any
 
963
                else:
 
964
                    any_address = socket.INADDR_ANY
 
965
                self.server_address = (any_address,
764
966
                                       self.server_address[1])
765
967
            elif not self.server_address[1]:
766
968
                self.server_address = (self.server_address[0],
767
969
                                       0)
768
 
#                 if self.settings["interface"]:
 
970
#                 if self.interface:
769
971
#                     self.server_address = (self.server_address[0],
770
972
#                                            0, # port
771
973
#                                            0, # flowinfo
772
974
#                                            if_nametoindex
773
 
#                                            (self.settings
774
 
#                                             ["interface"]))
775
 
            return super(IPv6_TCPServer, self).server_bind()
 
975
#                                            (self.interface))
 
976
            return socketserver.TCPServer.server_bind(self)
 
977
 
 
978
 
 
979
class MandosServer(IPv6_TCPServer):
 
980
    """Mandos server.
 
981
    
 
982
    Attributes:
 
983
        clients:        set of Client objects
 
984
        gnutls_priority GnuTLS priority string
 
985
        use_dbus:       Boolean; to emit D-Bus signals or not
 
986
        clients:        set of Client objects
 
987
        gnutls_priority GnuTLS priority string
 
988
        use_dbus:       Boolean; to emit D-Bus signals or not
 
989
    
 
990
    Assumes a gobject.MainLoop event loop.
 
991
    """
 
992
    def __init__(self, server_address, RequestHandlerClass,
 
993
                 interface=None, use_ipv6=True, clients=None,
 
994
                 gnutls_priority=None, use_dbus=True):
 
995
        self.enabled = False
 
996
        self.clients = clients
 
997
        if self.clients is None:
 
998
            self.clients = set()
 
999
        self.use_dbus = use_dbus
 
1000
        self.gnutls_priority = gnutls_priority
 
1001
        IPv6_TCPServer.__init__(self, server_address,
 
1002
                                RequestHandlerClass,
 
1003
                                interface = interface,
 
1004
                                use_ipv6 = use_ipv6)
776
1005
    def server_activate(self):
777
1006
        if self.enabled:
778
 
            return super(IPv6_TCPServer, self).server_activate()
 
1007
            return socketserver.TCPServer.server_activate(self)
779
1008
    def enable(self):
780
1009
        self.enabled = True
 
1010
    def add_pipe(self, pipe):
 
1011
        # Call "handle_ipc" for both data and EOF events
 
1012
        gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
 
1013
                             self.handle_ipc)
 
1014
    def handle_ipc(self, source, condition, file_objects={}):
 
1015
        condition_names = {
 
1016
            gobject.IO_IN: u"IN",   # There is data to read.
 
1017
            gobject.IO_OUT: u"OUT", # Data can be written (without
 
1018
                                    # blocking).
 
1019
            gobject.IO_PRI: u"PRI", # There is urgent data to read.
 
1020
            gobject.IO_ERR: u"ERR", # Error condition.
 
1021
            gobject.IO_HUP: u"HUP"  # Hung up (the connection has been
 
1022
                                    # broken, usually for pipes and
 
1023
                                    # sockets).
 
1024
            }
 
1025
        conditions_string = ' | '.join(name
 
1026
                                       for cond, name in
 
1027
                                       condition_names.iteritems()
 
1028
                                       if cond & condition)
 
1029
        logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
 
1030
                     conditions_string)
 
1031
        
 
1032
        # Turn the pipe file descriptor into a Python file object
 
1033
        if source not in file_objects:
 
1034
            file_objects[source] = os.fdopen(source, u"r", 1)
 
1035
        
 
1036
        # Read a line from the file object
 
1037
        cmdline = file_objects[source].readline()
 
1038
        if not cmdline:             # Empty line means end of file
 
1039
            # close the IPC pipe
 
1040
            file_objects[source].close()
 
1041
            del file_objects[source]
 
1042
            
 
1043
            # Stop calling this function
 
1044
            return False
 
1045
        
 
1046
        logger.debug(u"IPC command: %r", cmdline)
 
1047
        
 
1048
        # Parse and act on command
 
1049
        cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
 
1050
        
 
1051
        if cmd == u"NOTFOUND":
 
1052
            logger.warning(u"Client not found for fingerprint: %s",
 
1053
                           args)
 
1054
            if self.use_dbus:
 
1055
                # Emit D-Bus signal
 
1056
                mandos_dbus_service.ClientNotFound(args)
 
1057
        elif cmd == u"INVALID":
 
1058
            for client in self.clients:
 
1059
                if client.name == args:
 
1060
                    logger.warning(u"Client %s is invalid", args)
 
1061
                    if self.use_dbus:
 
1062
                        # Emit D-Bus signal
 
1063
                        client.Rejected()
 
1064
                    break
 
1065
            else:
 
1066
                logger.error(u"Unknown client %s is invalid", args)
 
1067
        elif cmd == u"SENDING":
 
1068
            for client in self.clients:
 
1069
                if client.name == args:
 
1070
                    logger.info(u"Sending secret to %s", client.name)
 
1071
                    client.checked_ok()
 
1072
                    if self.use_dbus:
 
1073
                        # Emit D-Bus signal
 
1074
                        client.ReceivedSecret()
 
1075
                    break
 
1076
            else:
 
1077
                logger.error(u"Sending secret to unknown client %s",
 
1078
                             args)
 
1079
        else:
 
1080
            logger.error(u"Unknown IPC command: %r", cmdline)
 
1081
        
 
1082
        # Keep calling this function
 
1083
        return True
781
1084
 
782
1085
 
783
1086
def string_to_delta(interval):
784
1087
    """Parse a string and return a datetime.timedelta
785
 
 
786
 
    >>> string_to_delta('7d')
 
1088
    
 
1089
    >>> string_to_delta(u'7d')
787
1090
    datetime.timedelta(7)
788
 
    >>> string_to_delta('60s')
 
1091
    >>> string_to_delta(u'60s')
789
1092
    datetime.timedelta(0, 60)
790
 
    >>> string_to_delta('60m')
 
1093
    >>> string_to_delta(u'60m')
791
1094
    datetime.timedelta(0, 3600)
792
 
    >>> string_to_delta('24h')
 
1095
    >>> string_to_delta(u'24h')
793
1096
    datetime.timedelta(1)
794
1097
    >>> string_to_delta(u'1w')
795
1098
    datetime.timedelta(7)
796
 
    >>> string_to_delta('5m 30s')
 
1099
    >>> string_to_delta(u'5m 30s')
797
1100
    datetime.timedelta(0, 330)
798
1101
    """
799
1102
    timevalue = datetime.timedelta(0)
819
1122
    return timevalue
820
1123
 
821
1124
 
822
 
def server_state_changed(state):
823
 
    """Derived from the Avahi example code"""
824
 
    if state == avahi.SERVER_COLLISION:
825
 
        logger.error(u"Zeroconf server name collision")
826
 
        service.remove()
827
 
    elif state == avahi.SERVER_RUNNING:
828
 
        service.add()
829
 
 
830
 
 
831
 
def entry_group_state_changed(state, error):
832
 
    """Derived from the Avahi example code"""
833
 
    logger.debug(u"Avahi state change: %i", state)
834
 
    
835
 
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
836
 
        logger.debug(u"Zeroconf service established.")
837
 
    elif state == avahi.ENTRY_GROUP_COLLISION:
838
 
        logger.warning(u"Zeroconf service name collision.")
839
 
        service.rename()
840
 
    elif state == avahi.ENTRY_GROUP_FAILURE:
841
 
        logger.critical(u"Avahi: Error in group state changed %s",
842
 
                        unicode(error))
843
 
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
844
 
 
845
1125
def if_nametoindex(interface):
846
 
    """Call the C function if_nametoindex(), or equivalent"""
 
1126
    """Call the C function if_nametoindex(), or equivalent
 
1127
    
 
1128
    Note: This function cannot accept a unicode string."""
847
1129
    global if_nametoindex
848
1130
    try:
849
1131
        if_nametoindex = (ctypes.cdll.LoadLibrary
850
 
                          (ctypes.util.find_library("c"))
 
1132
                          (ctypes.util.find_library(u"c"))
851
1133
                          .if_nametoindex)
852
1134
    except (OSError, AttributeError):
853
 
        if "struct" not in sys.modules:
854
 
            import struct
855
 
        if "fcntl" not in sys.modules:
856
 
            import fcntl
 
1135
        logger.warning(u"Doing if_nametoindex the hard way")
857
1136
        def if_nametoindex(interface):
858
1137
            "Get an interface index the hard way, i.e. using fcntl()"
859
1138
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
860
1139
            with closing(socket.socket()) as s:
861
1140
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
862
 
                                    struct.pack("16s16x", interface))
863
 
            interface_index = struct.unpack("I", ifreq[16:20])[0]
 
1141
                                    struct.pack(str(u"16s16x"),
 
1142
                                                interface))
 
1143
            interface_index = struct.unpack(str(u"I"),
 
1144
                                            ifreq[16:20])[0]
864
1145
            return interface_index
865
1146
    return if_nametoindex(interface)
866
1147
 
867
1148
 
868
1149
def daemon(nochdir = False, noclose = False):
869
1150
    """See daemon(3).  Standard BSD Unix function.
 
1151
    
870
1152
    This should really exist as os.daemon, but it doesn't (yet)."""
871
1153
    if os.fork():
872
1154
        sys.exit()
873
1155
    os.setsid()
874
1156
    if not nochdir:
875
 
        os.chdir("/")
 
1157
        os.chdir(u"/")
876
1158
    if os.fork():
877
1159
        sys.exit()
878
1160
    if not noclose:
880
1162
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
881
1163
        if not stat.S_ISCHR(os.fstat(null).st_mode):
882
1164
            raise OSError(errno.ENODEV,
883
 
                          "/dev/null not a character device")
 
1165
                          u"/dev/null not a character device")
884
1166
        os.dup2(null, sys.stdin.fileno())
885
1167
        os.dup2(null, sys.stdout.fileno())
886
1168
        os.dup2(null, sys.stderr.fileno())
889
1171
 
890
1172
 
891
1173
def main():
892
 
    parser = OptionParser(version = "%%prog %s" % version)
893
 
    parser.add_option("-i", "--interface", type="string",
894
 
                      metavar="IF", help="Bind to interface IF")
895
 
    parser.add_option("-a", "--address", type="string",
896
 
                      help="Address to listen for requests on")
897
 
    parser.add_option("-p", "--port", type="int",
898
 
                      help="Port number to receive requests on")
899
 
    parser.add_option("--check", action="store_true",
900
 
                      help="Run self-test")
901
 
    parser.add_option("--debug", action="store_true",
902
 
                      help="Debug mode; run in foreground and log to"
903
 
                      " terminal")
904
 
    parser.add_option("--priority", type="string", help="GnuTLS"
905
 
                      " priority string (see GnuTLS documentation)")
906
 
    parser.add_option("--servicename", type="string", metavar="NAME",
907
 
                      help="Zeroconf service name")
908
 
    parser.add_option("--configdir", type="string",
909
 
                      default="/etc/mandos", metavar="DIR",
910
 
                      help="Directory to search for configuration"
911
 
                      " files")
912
 
    parser.add_option("--no-dbus", action="store_false",
913
 
                      dest="use_dbus",
914
 
                      help="Do not provide D-Bus system bus"
915
 
                      " interface")
 
1174
    
 
1175
    ######################################################################
 
1176
    # Parsing of options, both command line and config file
 
1177
    
 
1178
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
1179
    parser.add_option("-i", u"--interface", type=u"string",
 
1180
                      metavar="IF", help=u"Bind to interface IF")
 
1181
    parser.add_option("-a", u"--address", type=u"string",
 
1182
                      help=u"Address to listen for requests on")
 
1183
    parser.add_option("-p", u"--port", type=u"int",
 
1184
                      help=u"Port number to receive requests on")
 
1185
    parser.add_option("--check", action=u"store_true",
 
1186
                      help=u"Run self-test")
 
1187
    parser.add_option("--debug", action=u"store_true",
 
1188
                      help=u"Debug mode; run in foreground and log to"
 
1189
                      u" terminal")
 
1190
    parser.add_option("--priority", type=u"string", help=u"GnuTLS"
 
1191
                      u" priority string (see GnuTLS documentation)")
 
1192
    parser.add_option("--servicename", type=u"string",
 
1193
                      metavar=u"NAME", help=u"Zeroconf service name")
 
1194
    parser.add_option("--configdir", type=u"string",
 
1195
                      default=u"/etc/mandos", metavar=u"DIR",
 
1196
                      help=u"Directory to search for configuration"
 
1197
                      u" files")
 
1198
    parser.add_option("--no-dbus", action=u"store_false",
 
1199
                      dest=u"use_dbus", help=u"Do not provide D-Bus"
 
1200
                      u" system bus interface")
 
1201
    parser.add_option("--no-ipv6", action=u"store_false",
 
1202
                      dest=u"use_ipv6", help=u"Do not use IPv6")
916
1203
    options = parser.parse_args()[0]
917
1204
    
918
1205
    if options.check:
921
1208
        sys.exit()
922
1209
    
923
1210
    # Default values for config file for server-global settings
924
 
    server_defaults = { "interface": "",
925
 
                        "address": "",
926
 
                        "port": "",
927
 
                        "debug": "False",
928
 
                        "priority":
929
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
930
 
                        "servicename": "Mandos",
931
 
                        "use_dbus": "True",
 
1211
    server_defaults = { u"interface": u"",
 
1212
                        u"address": u"",
 
1213
                        u"port": u"",
 
1214
                        u"debug": u"False",
 
1215
                        u"priority":
 
1216
                        u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
 
1217
                        u"servicename": u"Mandos",
 
1218
                        u"use_dbus": u"True",
 
1219
                        u"use_ipv6": u"True",
932
1220
                        }
933
1221
    
934
1222
    # Parse config file for server-global settings
935
 
    server_config = ConfigParser.SafeConfigParser(server_defaults)
 
1223
    server_config = configparser.SafeConfigParser(server_defaults)
936
1224
    del server_defaults
937
 
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
1225
    server_config.read(os.path.join(options.configdir,
 
1226
                                    u"mandos.conf"))
938
1227
    # Convert the SafeConfigParser object to a dict
939
1228
    server_settings = server_config.defaults()
940
 
    # Use getboolean on the boolean config options
941
 
    server_settings["debug"] = (server_config.getboolean
942
 
                                ("DEFAULT", "debug"))
943
 
    server_settings["use_dbus"] = (server_config.getboolean
944
 
                                   ("DEFAULT", "use_dbus"))
 
1229
    # Use the appropriate methods on the non-string config options
 
1230
    for option in (u"debug", u"use_dbus", u"use_ipv6"):
 
1231
        server_settings[option] = server_config.getboolean(u"DEFAULT",
 
1232
                                                           option)
 
1233
    if server_settings["port"]:
 
1234
        server_settings["port"] = server_config.getint(u"DEFAULT",
 
1235
                                                       u"port")
945
1236
    del server_config
946
1237
    
947
1238
    # Override the settings from the config file with command line
948
1239
    # options, if set.
949
 
    for option in ("interface", "address", "port", "debug",
950
 
                   "priority", "servicename", "configdir",
951
 
                   "use_dbus"):
 
1240
    for option in (u"interface", u"address", u"port", u"debug",
 
1241
                   u"priority", u"servicename", u"configdir",
 
1242
                   u"use_dbus", u"use_ipv6"):
952
1243
        value = getattr(options, option)
953
1244
        if value is not None:
954
1245
            server_settings[option] = value
955
1246
    del options
 
1247
    # Force all strings to be unicode
 
1248
    for option in server_settings.keys():
 
1249
        if type(server_settings[option]) is str:
 
1250
            server_settings[option] = unicode(server_settings[option])
956
1251
    # Now we have our good server settings in "server_settings"
957
1252
    
 
1253
    ##################################################################
 
1254
    
958
1255
    # For convenience
959
 
    debug = server_settings["debug"]
960
 
    use_dbus = server_settings["use_dbus"]
 
1256
    debug = server_settings[u"debug"]
 
1257
    use_dbus = server_settings[u"use_dbus"]
 
1258
    use_ipv6 = server_settings[u"use_ipv6"]
961
1259
    
962
1260
    if not debug:
963
1261
        syslogger.setLevel(logging.WARNING)
964
1262
        console.setLevel(logging.WARNING)
965
1263
    
966
 
    if server_settings["servicename"] != "Mandos":
 
1264
    if server_settings[u"servicename"] != u"Mandos":
967
1265
        syslogger.setFormatter(logging.Formatter
968
 
                               ('Mandos (%s): %%(levelname)s:'
969
 
                                ' %%(message)s'
970
 
                                % server_settings["servicename"]))
 
1266
                               (u'Mandos (%s) [%%(process)d]:'
 
1267
                                u' %%(levelname)s: %%(message)s'
 
1268
                                % server_settings[u"servicename"]))
971
1269
    
972
1270
    # Parse config file with clients
973
 
    client_defaults = { "timeout": "1h",
974
 
                        "interval": "5m",
975
 
                        "checker": "fping -q -- %(host)s",
976
 
                        "host": "",
 
1271
    client_defaults = { u"timeout": u"1h",
 
1272
                        u"interval": u"5m",
 
1273
                        u"checker": u"fping -q -- %%(host)s",
 
1274
                        u"host": u"",
977
1275
                        }
978
 
    client_config = ConfigParser.SafeConfigParser(client_defaults)
979
 
    client_config.read(os.path.join(server_settings["configdir"],
980
 
                                    "clients.conf"))
981
 
    
982
 
    clients = Set()
983
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
984
 
                                 server_settings["port"]),
985
 
                                TCP_handler,
986
 
                                settings=server_settings,
987
 
                                clients=clients)
988
 
    pidfilename = "/var/run/mandos.pid"
989
 
    try:
990
 
        pidfile = open(pidfilename, "w")
991
 
    except IOError, error:
992
 
        logger.error("Could not open file %r", pidfilename)
993
 
    
994
 
    try:
995
 
        uid = pwd.getpwnam("_mandos").pw_uid
 
1276
    client_config = configparser.SafeConfigParser(client_defaults)
 
1277
    client_config.read(os.path.join(server_settings[u"configdir"],
 
1278
                                    u"clients.conf"))
 
1279
    
 
1280
    global mandos_dbus_service
 
1281
    mandos_dbus_service = None
 
1282
    
 
1283
    tcp_server = MandosServer((server_settings[u"address"],
 
1284
                               server_settings[u"port"]),
 
1285
                              ClientHandler,
 
1286
                              interface=server_settings[u"interface"],
 
1287
                              use_ipv6=use_ipv6,
 
1288
                              gnutls_priority=
 
1289
                              server_settings[u"priority"],
 
1290
                              use_dbus=use_dbus)
 
1291
    pidfilename = u"/var/run/mandos.pid"
 
1292
    try:
 
1293
        pidfile = open(pidfilename, u"w")
 
1294
    except IOError:
 
1295
        logger.error(u"Could not open file %r", pidfilename)
 
1296
    
 
1297
    try:
 
1298
        uid = pwd.getpwnam(u"_mandos").pw_uid
 
1299
        gid = pwd.getpwnam(u"_mandos").pw_gid
996
1300
    except KeyError:
997
1301
        try:
998
 
            uid = pwd.getpwnam("mandos").pw_uid
 
1302
            uid = pwd.getpwnam(u"mandos").pw_uid
 
1303
            gid = pwd.getpwnam(u"mandos").pw_gid
999
1304
        except KeyError:
1000
1305
            try:
1001
 
                uid = pwd.getpwnam("nobody").pw_uid
 
1306
                uid = pwd.getpwnam(u"nobody").pw_uid
 
1307
                gid = pwd.getpwnam(u"nobody").pw_gid
1002
1308
            except KeyError:
1003
1309
                uid = 65534
1004
 
    try:
1005
 
        gid = pwd.getpwnam("_mandos").pw_gid
1006
 
    except KeyError:
1007
 
        try:
1008
 
            gid = pwd.getpwnam("mandos").pw_gid
1009
 
        except KeyError:
1010
 
            try:
1011
 
                gid = pwd.getpwnam("nogroup").pw_gid
1012
 
            except KeyError:
1013
1310
                gid = 65534
1014
1311
    try:
 
1312
        os.setgid(gid)
1015
1313
        os.setuid(uid)
1016
 
        os.setgid(gid)
1017
1314
    except OSError, error:
1018
1315
        if error[0] != errno.EPERM:
1019
1316
            raise error
1020
1317
    
1021
 
    global service
1022
 
    service = AvahiService(name = server_settings["servicename"],
1023
 
                           servicetype = "_mandos._tcp", )
1024
 
    if server_settings["interface"]:
1025
 
        service.interface = (if_nametoindex
1026
 
                             (server_settings["interface"]))
 
1318
    # Enable all possible GnuTLS debugging
 
1319
    if debug:
 
1320
        # "Use a log level over 10 to enable all debugging options."
 
1321
        # - GnuTLS manual
 
1322
        gnutls.library.functions.gnutls_global_set_log_level(11)
 
1323
        
 
1324
        @gnutls.library.types.gnutls_log_func
 
1325
        def debug_gnutls(level, string):
 
1326
            logger.debug(u"GnuTLS: %s", string[:-1])
 
1327
        
 
1328
        (gnutls.library.functions
 
1329
         .gnutls_global_set_log_function(debug_gnutls))
1027
1330
    
1028
1331
    global main_loop
1029
 
    global bus
1030
 
    global server
1031
1332
    # From the Avahi example code
1032
1333
    DBusGMainLoop(set_as_default=True )
1033
1334
    main_loop = gobject.MainLoop()
1034
1335
    bus = dbus.SystemBus()
1035
 
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1036
 
                                           avahi.DBUS_PATH_SERVER),
1037
 
                            avahi.DBUS_INTERFACE_SERVER)
1038
1336
    # End of Avahi example code
1039
1337
    if use_dbus:
1040
 
        bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
1041
 
                                        bus)
 
1338
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
 
1339
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
 
1340
    service = AvahiService(name = server_settings[u"servicename"],
 
1341
                           servicetype = u"_mandos._tcp",
 
1342
                           protocol = protocol, bus = bus)
 
1343
    if server_settings["interface"]:
 
1344
        service.interface = (if_nametoindex
 
1345
                             (str(server_settings[u"interface"])))
1042
1346
    
1043
 
    clients.update(Set(Client(name = section,
1044
 
                              config
1045
 
                              = dict(client_config.items(section)),
1046
 
                              use_dbus = use_dbus)
1047
 
                       for section in client_config.sections()))
1048
 
    if not clients:
 
1347
    client_class = Client
 
1348
    if use_dbus:
 
1349
        client_class = functools.partial(ClientDBus, bus = bus)
 
1350
    tcp_server.clients.update(set(
 
1351
            client_class(name = section,
 
1352
                         config= dict(client_config.items(section)))
 
1353
            for section in client_config.sections()))
 
1354
    if not tcp_server.clients:
1049
1355
        logger.warning(u"No clients defined")
1050
1356
    
1051
1357
    if debug:
1061
1367
        daemon()
1062
1368
    
1063
1369
    try:
1064
 
        pid = os.getpid()
1065
 
        pidfile.write(str(pid) + "\n")
1066
 
        pidfile.close()
 
1370
        with closing(pidfile):
 
1371
            pid = os.getpid()
 
1372
            pidfile.write(str(pid) + "\n")
1067
1373
        del pidfile
1068
1374
    except IOError:
1069
1375
        logger.error(u"Could not write to file %r with PID %d",
1075
1381
    
1076
1382
    def cleanup():
1077
1383
        "Cleanup function; run on exit"
1078
 
        global group
1079
 
        # From the Avahi example code
1080
 
        if not group is None:
1081
 
            group.Free()
1082
 
            group = None
1083
 
        # End of Avahi example code
 
1384
        service.cleanup()
1084
1385
        
1085
 
        while clients:
1086
 
            client = clients.pop()
 
1386
        while tcp_server.clients:
 
1387
            client = tcp_server.clients.pop()
1087
1388
            client.disable_hook = None
1088
1389
            client.disable()
1089
1390
    
1095
1396
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1096
1397
    
1097
1398
    if use_dbus:
1098
 
        class MandosServer(dbus.service.Object):
 
1399
        class MandosDBusService(dbus.service.Object):
1099
1400
            """A D-Bus proxy object"""
1100
1401
            def __init__(self):
1101
 
                dbus.service.Object.__init__(self, bus,
1102
 
                                             "/Mandos")
1103
 
            _interface = u"org.mandos_system.Mandos"
1104
 
 
1105
 
            @dbus.service.signal(_interface, signature="oa{sv}")
 
1402
                dbus.service.Object.__init__(self, bus, u"/")
 
1403
            _interface = u"se.bsnet.fukt.Mandos"
 
1404
            
 
1405
            @dbus.service.signal(_interface, signature=u"oa{sv}")
1106
1406
            def ClientAdded(self, objpath, properties):
1107
1407
                "D-Bus signal"
1108
1408
                pass
1109
 
 
1110
 
            @dbus.service.signal(_interface, signature="o")
1111
 
            def ClientRemoved(self, objpath):
1112
 
                "D-Bus signal"
1113
 
                pass
1114
 
 
1115
 
            @dbus.service.method(_interface, out_signature="ao")
 
1409
            
 
1410
            @dbus.service.signal(_interface, signature=u"s")
 
1411
            def ClientNotFound(self, fingerprint):
 
1412
                "D-Bus signal"
 
1413
                pass
 
1414
            
 
1415
            @dbus.service.signal(_interface, signature=u"os")
 
1416
            def ClientRemoved(self, objpath, name):
 
1417
                "D-Bus signal"
 
1418
                pass
 
1419
            
 
1420
            @dbus.service.method(_interface, out_signature=u"ao")
1116
1421
            def GetAllClients(self):
1117
 
                return dbus.Array(c.dbus_object_path for c in clients)
1118
 
 
1119
 
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
 
1422
                "D-Bus method"
 
1423
                return dbus.Array(c.dbus_object_path
 
1424
                                  for c in tcp_server.clients)
 
1425
            
 
1426
            @dbus.service.method(_interface,
 
1427
                                 out_signature=u"a{oa{sv}}")
1120
1428
            def GetAllClientsWithProperties(self):
 
1429
                "D-Bus method"
1121
1430
                return dbus.Dictionary(
1122
1431
                    ((c.dbus_object_path, c.GetAllProperties())
1123
 
                     for c in clients),
1124
 
                    signature="oa{sv}")
1125
 
 
1126
 
            @dbus.service.method(_interface, in_signature="o")
 
1432
                     for c in tcp_server.clients),
 
1433
                    signature=u"oa{sv}")
 
1434
            
 
1435
            @dbus.service.method(_interface, in_signature=u"o")
1127
1436
            def RemoveClient(self, object_path):
1128
 
                for c in clients:
 
1437
                "D-Bus method"
 
1438
                for c in tcp_server.clients:
1129
1439
                    if c.dbus_object_path == object_path:
1130
 
                        clients.remove(c)
 
1440
                        tcp_server.clients.remove(c)
 
1441
                        c.remove_from_connection()
1131
1442
                        # Don't signal anything except ClientRemoved
1132
 
                        c.use_dbus = False
1133
 
                        c.disable()
 
1443
                        c.disable(signal=False)
1134
1444
                        # Emit D-Bus signal
1135
 
                        self.ClientRemoved(object_path)
 
1445
                        self.ClientRemoved(object_path, c.name)
1136
1446
                        return
1137
1447
                raise KeyError
1138
 
            @dbus.service.method(_interface)
1139
 
            def Quit(self):
1140
 
                main_loop.quit()
1141
 
 
 
1448
            
1142
1449
            del _interface
1143
 
    
1144
 
        mandos_server = MandosServer()
1145
 
    
1146
 
    for client in clients:
 
1450
        
 
1451
        mandos_dbus_service = MandosDBusService()
 
1452
    
 
1453
    for client in tcp_server.clients:
1147
1454
        if use_dbus:
1148
1455
            # Emit D-Bus signal
1149
 
            mandos_server.ClientAdded(client.dbus_object_path,
1150
 
                                      client.GetAllProperties())
 
1456
            mandos_dbus_service.ClientAdded(client.dbus_object_path,
 
1457
                                            client.GetAllProperties())
1151
1458
        client.enable()
1152
1459
    
1153
1460
    tcp_server.enable()
1155
1462
    
1156
1463
    # Find out what port we got
1157
1464
    service.port = tcp_server.socket.getsockname()[1]
1158
 
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1159
 
                u" scope_id %d" % tcp_server.socket.getsockname())
 
1465
    if use_ipv6:
 
1466
        logger.info(u"Now listening on address %r, port %d,"
 
1467
                    " flowinfo %d, scope_id %d"
 
1468
                    % tcp_server.socket.getsockname())
 
1469
    else:                       # IPv4
 
1470
        logger.info(u"Now listening on address %r, port %d"
 
1471
                    % tcp_server.socket.getsockname())
1160
1472
    
1161
1473
    #service.interface = tcp_server.socket.getsockname()[3]
1162
1474
    
1163
1475
    try:
1164
1476
        # From the Avahi example code
1165
 
        server.connect_to_signal("StateChanged", server_state_changed)
1166
1477
        try:
1167
 
            server_state_changed(server.GetState())
 
1478
            service.activate()
1168
1479
        except dbus.exceptions.DBusException, error:
1169
1480
            logger.critical(u"DBusException: %s", error)
1170
1481
            sys.exit(1)
1182
1493
        sys.exit(1)
1183
1494
    except KeyboardInterrupt:
1184
1495
        if debug:
1185
 
            print
 
1496
            print >> sys.stderr
 
1497
        logger.debug(u"Server received KeyboardInterrupt")
 
1498
    logger.debug(u"Server exiting")
1186
1499
 
1187
1500
if __name__ == '__main__':
1188
1501
    main()