/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2009-01-04 21:54:55 UTC
  • Revision ID: teddy@fukt.bsnet.se-20090104215455-o5q1zdrlxzr1wmn1
* README: Update copyright year; add "2009".
* debian/copyright: - '' -
* mandos: - '' -
* mandos-clients.conf.xml: - '' -
* mandos-keygen: - '' -
* mandos-keygen.xml: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
* plugin-runner.c: - '' -
* plugin-runner.xml: - '' -
* plugins.d/askpass-fifo.c: - '' -
* plugins.d/askpass-fifo.xml: - '' -
* plugins.d/mandos-client.c: - '' -
* plugins.d/mandos-client.xml: - '' -
* plugins.d/password-prompt.c: - '' -
* plugins.d/password-prompt.xml: - '' -
* plugins.d/splashy.c: - '' -
* plugins.d/splashy.xml: - '' -
* plugins.d/usplash.c: - '' -
* plugins.d/usplash.xml: - '' -

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Lines of Context:
mandos
6
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", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
 
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".
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 as socketserver
 
36
import SocketServer
37
37
import socket
38
 
import optparse
 
38
from optparse import OptionParser
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 as configparser
 
47
import ConfigParser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
 
52
from sets import Set
52
53
import subprocess
53
54
import atexit
54
55
import stat
56
57
import logging.handlers
57
58
import pwd
58
59
from contextlib import closing
59
 
import struct
60
 
import fcntl
61
 
import functools
62
60
 
63
61
import dbus
64
62
import dbus.service
68
66
import ctypes
69
67
import ctypes.util
70
68
 
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 = "1.0.8"
81
 
 
82
 
logger = logging.Logger(u'mandos')
 
69
version = "1.0.2"
 
70
 
 
71
logger = logging.Logger('mandos')
83
72
syslogger = (logging.handlers.SysLogHandler
84
73
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
85
74
              address = "/dev/log"))
86
75
syslogger.setFormatter(logging.Formatter
87
 
                       (u'Mandos [%(process)d]: %(levelname)s:'
88
 
                        u' %(message)s'))
 
76
                       ('Mandos: %(levelname)s: %(message)s'))
89
77
logger.addHandler(syslogger)
90
78
 
91
79
console = logging.StreamHandler()
92
 
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
 
                                       u' %(levelname)s:'
94
 
                                       u' %(message)s'))
 
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
 
81
                                       ' %(message)s'))
95
82
logger.addHandler(console)
96
83
 
97
84
class AvahiError(Exception):
110
97
 
111
98
class AvahiService(object):
112
99
    """An Avahi (Zeroconf) service.
113
 
    
114
100
    Attributes:
115
101
    interface: integer; avahi.IF_UNSPEC or an interface index.
116
102
               Used to optionally bind to the specified interface.
117
 
    name: string; Example: u'Mandos'
118
 
    type: string; Example: u'_mandos._tcp'.
 
103
    name: string; Example: 'Mandos'
 
104
    type: string; Example: '_mandos._tcp'.
119
105
                  See <http://www.dns-sd.org/ServiceTypes.html>
120
106
    port: integer; what port to announce
121
107
    TXT: list of strings; TXT record for the service
124
110
    max_renames: integer; maximum number of renames
125
111
    rename_count: integer; counter so we only rename after collisions
126
112
                  a sensible number of times
127
 
    group: D-Bus Entry Group
128
 
    server: D-Bus Server
129
 
    bus: dbus.SystemBus()
130
113
    """
131
114
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
132
115
                 servicetype = None, port = None, TXT = None,
133
 
                 domain = u"", host = u"", max_renames = 32768,
134
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
116
                 domain = "", host = "", max_renames = 32768):
135
117
        self.interface = interface
136
118
        self.name = name
137
119
        self.type = servicetype
141
123
        self.host = host
142
124
        self.rename_count = 0
143
125
        self.max_renames = max_renames
144
 
        self.protocol = protocol
145
 
        self.group = None       # our entry group
146
 
        self.server = None
147
 
        self.bus = bus
148
126
    def rename(self):
149
127
        """Derived from the Avahi example code"""
150
128
        if self.rename_count >= self.max_renames:
152
130
                            u" after %i retries, exiting.",
153
131
                            self.rename_count)
154
132
            raise AvahiServiceError(u"Too many renames")
155
 
        self.name = self.server.GetAlternativeServiceName(self.name)
 
133
        self.name = server.GetAlternativeServiceName(self.name)
156
134
        logger.info(u"Changing Zeroconf service name to %r ...",
157
 
                    unicode(self.name))
 
135
                    str(self.name))
158
136
        syslogger.setFormatter(logging.Formatter
159
 
                               (u'Mandos (%s) [%%(process)d]:'
160
 
                                u' %%(levelname)s: %%(message)s'
161
 
                                % self.name))
 
137
                               ('Mandos (%s): %%(levelname)s:'
 
138
                                ' %%(message)s' % self.name))
162
139
        self.remove()
163
140
        self.add()
164
141
        self.rename_count += 1
165
142
    def remove(self):
166
143
        """Derived from the Avahi example code"""
167
 
        if self.group is not None:
168
 
            self.group.Reset()
 
144
        if group is not None:
 
145
            group.Reset()
169
146
    def add(self):
170
147
        """Derived from the Avahi example code"""
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)
 
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)
178
156
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
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):
 
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):
228
179
    """A representation of a client host served by this server.
229
 
    
230
180
    Attributes:
231
 
    name:       string; from the config file, used in log messages and
232
 
                        D-Bus identifiers
 
181
    name:       string; from the config file, used in log messages
233
182
    fingerprint: string (40 or 32 hexadecimal digits); used to
234
183
                 uniquely identify the client
235
184
    secret:     bytestring; sent verbatim (over TLS) to client
252
201
                     client lives.  %() expansions are done at
253
202
                     runtime with vars(self) as dict, so that for
254
203
                     instance %(name)s can be used in the command.
255
 
    current_checker_command: string; current running checker_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
256
206
    """
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
 
    
265
207
    def timeout_milliseconds(self):
266
208
        "Return the 'timeout' attribute in milliseconds"
267
 
        return self._datetime_to_milliseconds(self.timeout)
 
209
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
 
210
                + (self.timeout.seconds * 1000)
 
211
                + (self.timeout.microseconds // 1000))
268
212
    
269
213
    def interval_milliseconds(self):
270
214
        "Return the 'interval' attribute in milliseconds"
271
 
        return self._datetime_to_milliseconds(self.interval)
 
215
        return ((self.interval.days * 24 * 60 * 60 * 1000)
 
216
                + (self.interval.seconds * 1000)
 
217
                + (self.interval.microseconds // 1000))
272
218
    
273
 
    def __init__(self, name = None, disable_hook=None, config=None):
 
219
    def __init__(self, name = None, disable_hook=None, config=None,
 
220
                 use_dbus=True):
274
221
        """Note: the 'checker' key in 'config' sets the
275
222
        'checker_command' attribute and *not* the 'checker'
276
223
        attribute."""
278
225
        if config is None:
279
226
            config = {}
280
227
        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)
281
235
        # Uppercase and remove spaces from fingerprint for later
282
236
        # comparison purposes with return value from the fingerprint()
283
237
        # function
284
 
        self.fingerprint = (config[u"fingerprint"].upper()
 
238
        self.fingerprint = (config["fingerprint"].upper()
285
239
                            .replace(u" ", u""))
286
240
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
287
 
        if u"secret" in config:
288
 
            self.secret = config[u"secret"].decode(u"base64")
289
 
        elif u"secfile" in config:
 
241
        if "secret" in config:
 
242
            self.secret = config["secret"].decode(u"base64")
 
243
        elif "secfile" in config:
290
244
            with closing(open(os.path.expanduser
291
245
                              (os.path.expandvars
292
 
                               (config[u"secfile"])))) as secfile:
 
246
                               (config["secfile"])))) as secfile:
293
247
                self.secret = secfile.read()
294
248
        else:
295
249
            raise TypeError(u"No secret or secfile for client %s"
296
250
                            % self.name)
297
 
        self.host = config.get(u"host", u"")
 
251
        self.host = config.get("host", "")
298
252
        self.created = datetime.datetime.utcnow()
299
253
        self.enabled = False
300
254
        self.last_enabled = None
301
255
        self.last_checked_ok = None
302
 
        self.timeout = string_to_delta(config[u"timeout"])
303
 
        self.interval = string_to_delta(config[u"interval"])
 
256
        self.timeout = string_to_delta(config["timeout"])
 
257
        self.interval = string_to_delta(config["interval"])
304
258
        self.disable_hook = disable_hook
305
259
        self.checker = None
306
260
        self.checker_initiator_tag = None
307
261
        self.disable_initiator_tag = None
308
262
        self.checker_callback_tag = None
309
 
        self.checker_command = config[u"checker"]
310
 
        self.current_checker_command = None
311
 
        self.last_connect = None
 
263
        self.checker_command = config["checker"]
312
264
    
313
265
    def enable(self):
314
266
        """Start this client's checker and timeout hooks"""
325
277
                                   (self.timeout_milliseconds(),
326
278
                                    self.disable))
327
279
        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)))
328
287
    
329
288
    def disable(self):
330
289
        """Disable this client."""
331
290
        if not getattr(self, "enabled", False):
332
291
            return False
333
292
        logger.info(u"Disabling client %s", self.name)
334
 
        if getattr(self, u"disable_initiator_tag", False):
 
293
        if getattr(self, "disable_initiator_tag", False):
335
294
            gobject.source_remove(self.disable_initiator_tag)
336
295
            self.disable_initiator_tag = None
337
 
        if getattr(self, u"checker_initiator_tag", False):
 
296
        if getattr(self, "checker_initiator_tag", False):
338
297
            gobject.source_remove(self.checker_initiator_tag)
339
298
            self.checker_initiator_tag = None
340
299
        self.stop_checker()
341
300
        if self.disable_hook:
342
301
            self.disable_hook(self)
343
302
        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))
344
307
        # Do not run this again if called by a gobject.timeout_add
345
308
        return False
346
309
    
352
315
        """The checker has completed, so take appropriate actions."""
353
316
        self.checker_callback_tag = None
354
317
        self.checker = None
355
 
        if os.WIFEXITED(condition):
356
 
            exitstatus = os.WEXITSTATUS(condition)
357
 
            if exitstatus == 0:
358
 
                logger.info(u"Checker for %(name)s succeeded",
359
 
                            vars(self))
360
 
                self.checked_ok()
361
 
            else:
362
 
                logger.info(u"Checker for %(name)s failed",
363
 
                            vars(self))
364
 
        else:
 
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):
365
333
            logger.warning(u"Checker for %(name)s crashed?",
366
334
                           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))
367
348
    
368
 
    def checked_ok(self):
 
349
    def bump_timeout(self):
369
350
        """Bump up the timeout for this client.
370
 
        
371
351
        This should only be called when the client has been seen,
372
352
        alive and well.
373
353
        """
376
356
        self.disable_initiator_tag = (gobject.timeout_add
377
357
                                      (self.timeout_milliseconds(),
378
358
                                       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)))
379
365
    
380
366
    def start_checker(self):
381
367
        """Start a new checker subprocess if one is not running.
382
 
        
383
368
        If a checker already exists, leave it running and do
384
369
        nothing."""
385
370
        # The reason for not killing a running checker is that if we
390
375
        # checkers alone, the checker would have to take more time
391
376
        # than 'timeout' for the client to be declared invalid, which
392
377
        # is as it should be.
393
 
        
394
 
        # If a checker exists, make sure it is not a zombie
395
 
        if self.checker is not None:
396
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
397
 
            if pid:
398
 
                logger.warning(u"Checker was a zombie")
399
 
                gobject.source_remove(self.checker_callback_tag)
400
 
                self.checker_callback(pid, status,
401
 
                                      self.current_checker_command)
402
 
        # Start a new checker if needed
403
378
        if self.checker is None:
404
379
            try:
405
380
                # In case checker_command has exactly one % operator
406
381
                command = self.checker_command % self.host
407
382
            except TypeError:
408
383
                # Escape attributes for the shell
409
 
                escaped_attrs = dict((key,
410
 
                                      re.escape(unicode(str(val),
411
 
                                                        errors=
412
 
                                                        u'replace')))
 
384
                escaped_attrs = dict((key, re.escape(str(val)))
413
385
                                     for key, val in
414
386
                                     vars(self).iteritems())
415
387
                try:
418
390
                    logger.error(u'Could not format string "%s":'
419
391
                                 u' %s', self.checker_command, error)
420
392
                    return True # Try again later
421
 
            self.current_checker_command = command
422
393
            try:
423
394
                logger.info(u"Starting checker %r for %s",
424
395
                            command, self.name)
428
399
                # always replaced by /dev/null.)
429
400
                self.checker = subprocess.Popen(command,
430
401
                                                close_fds=True,
431
 
                                                shell=True, cwd=u"/")
 
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))
432
409
                self.checker_callback_tag = (gobject.child_watch_add
433
410
                                             (self.checker.pid,
434
411
                                              self.checker_callback,
435
412
                                              data=command))
436
 
                # The checker may have completed before the gobject
437
 
                # watch was added.  Check for this.
438
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
439
 
                if pid:
440
 
                    gobject.source_remove(self.checker_callback_tag)
441
 
                    self.checker_callback(pid, status, command)
442
413
            except OSError, error:
443
414
                logger.error(u"Failed to start subprocess: %s",
444
415
                             error)
450
421
        if self.checker_callback_tag:
451
422
            gobject.source_remove(self.checker_callback_tag)
452
423
            self.checker_callback_tag = None
453
 
        if getattr(self, u"checker", None) is None:
 
424
        if getattr(self, "checker", None) is None:
454
425
            return
455
426
        logger.debug(u"Stopping checker for %(name)s", vars(self))
456
427
        try:
462
433
            if error.errno != errno.ESRCH: # No such process
463
434
                raise
464
435
        self.checker = None
 
436
        if self.use_dbus:
 
437
            self.PropertyChanged(dbus.String(u"checker_running"),
 
438
                                 dbus.Boolean(False, variant_level=1))
465
439
    
466
440
    def still_valid(self):
467
441
        """Has the timeout not yet passed for this client?"""
468
 
        if not getattr(self, u"enabled", False):
 
442
        if not getattr(self, "enabled", False):
469
443
            return False
470
444
        now = datetime.datetime.utcnow()
471
445
        if self.last_checked_ok is None:
472
446
            return now < (self.created + self.timeout)
473
447
        else:
474
448
            return now < (self.last_checked_ok + self.timeout)
475
 
 
476
 
 
477
 
class ClientDBus(Client, dbus.service.Object):
478
 
    """A Client class using D-Bus
479
 
    
480
 
    Attributes:
481
 
    dbus_object_path: dbus.ObjectPath
482
 
    bus: dbus.SystemBus()
483
 
    """
484
 
    # dbus.service.Object doesn't use super(), so we can't either.
485
 
    
486
 
    def __init__(self, bus = None, *args, **kwargs):
487
 
        self.bus = bus
488
 
        Client.__init__(self, *args, **kwargs)
489
 
        # Only now, when this client is initialized, can it show up on
490
 
        # the D-Bus
491
 
        self.dbus_object_path = (dbus.ObjectPath
492
 
                                 (u"/clients/"
493
 
                                  + self.name.replace(u".", u"_")))
494
 
        dbus.service.Object.__init__(self, self.bus,
495
 
                                     self.dbus_object_path)
496
 
    
497
 
    @staticmethod
498
 
    def _datetime_to_dbus(dt, variant_level=0):
499
 
        """Convert a UTC datetime.datetime() to a D-Bus type."""
500
 
        return dbus.String(dt.isoformat(),
501
 
                           variant_level=variant_level)
502
 
    
503
 
    def enable(self):
504
 
        oldstate = getattr(self, u"enabled", False)
505
 
        r = Client.enable(self)
506
 
        if oldstate != self.enabled:
507
 
            # Emit D-Bus signals
508
 
            self.PropertyChanged(dbus.String(u"enabled"),
509
 
                                 dbus.Boolean(True, variant_level=1))
510
 
            self.PropertyChanged(
511
 
                dbus.String(u"last_enabled"),
512
 
                self._datetime_to_dbus(self.last_enabled,
513
 
                                       variant_level=1))
514
 
        return r
515
 
    
516
 
    def disable(self, signal = True):
517
 
        oldstate = getattr(self, u"enabled", False)
518
 
        r = Client.disable(self)
519
 
        if signal and oldstate != self.enabled:
520
 
            # Emit D-Bus signal
521
 
            self.PropertyChanged(dbus.String(u"enabled"),
522
 
                                 dbus.Boolean(False, variant_level=1))
523
 
        return r
524
 
    
525
 
    def __del__(self, *args, **kwargs):
526
 
        try:
527
 
            self.remove_from_connection()
528
 
        except LookupError:
529
 
            pass
530
 
        if hasattr(dbus.service.Object, u"__del__"):
531
 
            dbus.service.Object.__del__(self, *args, **kwargs)
532
 
        Client.__del__(self, *args, **kwargs)
533
 
    
534
 
    def checker_callback(self, pid, condition, command,
535
 
                         *args, **kwargs):
536
 
        self.checker_callback_tag = None
537
 
        self.checker = None
538
 
        # Emit D-Bus signal
539
 
        self.PropertyChanged(dbus.String(u"checker_running"),
540
 
                             dbus.Boolean(False, variant_level=1))
541
 
        if os.WIFEXITED(condition):
542
 
            exitstatus = os.WEXITSTATUS(condition)
543
 
            # Emit D-Bus signal
544
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
545
 
                                  dbus.Int64(condition),
546
 
                                  dbus.String(command))
547
 
        else:
548
 
            # Emit D-Bus signal
549
 
            self.CheckerCompleted(dbus.Int16(-1),
550
 
                                  dbus.Int64(condition),
551
 
                                  dbus.String(command))
552
 
        
553
 
        return Client.checker_callback(self, pid, condition, command,
554
 
                                       *args, **kwargs)
555
 
    
556
 
    def checked_ok(self, *args, **kwargs):
557
 
        r = Client.checked_ok(self, *args, **kwargs)
558
 
        # Emit D-Bus signal
559
 
        self.PropertyChanged(
560
 
            dbus.String(u"last_checked_ok"),
561
 
            (self._datetime_to_dbus(self.last_checked_ok,
562
 
                                    variant_level=1)))
563
 
        return r
564
 
    
565
 
    def start_checker(self, *args, **kwargs):
566
 
        old_checker = self.checker
567
 
        if self.checker is not None:
568
 
            old_checker_pid = self.checker.pid
569
 
        else:
570
 
            old_checker_pid = None
571
 
        r = Client.start_checker(self, *args, **kwargs)
572
 
        # Only if new checker process was started
573
 
        if (self.checker is not None
574
 
            and old_checker_pid != self.checker.pid):
575
 
            # Emit D-Bus signal
576
 
            self.CheckerStarted(self.current_checker_command)
577
 
            self.PropertyChanged(
578
 
                dbus.String(u"checker_running"),
579
 
                dbus.Boolean(True, variant_level=1))
580
 
        return r
581
 
    
582
 
    def stop_checker(self, *args, **kwargs):
583
 
        old_checker = getattr(self, u"checker", None)
584
 
        r = Client.stop_checker(self, *args, **kwargs)
585
 
        if (old_checker is not None
586
 
            and getattr(self, u"checker", None) is None):
587
 
            self.PropertyChanged(dbus.String(u"checker_running"),
588
 
                                 dbus.Boolean(False, variant_level=1))
589
 
        return r
590
449
    
591
450
    ## D-Bus methods & signals
592
 
    _interface = u"se.bsnet.fukt.Mandos.Client"
 
451
    _interface = u"org.mandos_system.Mandos.Client"
593
452
    
594
 
    # CheckedOK - method
595
 
    @dbus.service.method(_interface)
596
 
    def CheckedOK(self):
597
 
        return self.checked_ok()
 
453
    # BumpTimeout - method
 
454
    BumpTimeout = dbus.service.method(_interface)(bump_timeout)
 
455
    BumpTimeout.__name__ = "BumpTimeout"
598
456
    
599
457
    # CheckerCompleted - signal
600
 
    @dbus.service.signal(_interface, signature=u"nxs")
601
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
 
458
    @dbus.service.signal(_interface, signature="bqs")
 
459
    def CheckerCompleted(self, success, condition, command):
602
460
        "D-Bus signal"
603
461
        pass
604
462
    
605
463
    # CheckerStarted - signal
606
 
    @dbus.service.signal(_interface, signature=u"s")
 
464
    @dbus.service.signal(_interface, signature="s")
607
465
    def CheckerStarted(self, command):
608
466
        "D-Bus signal"
609
467
        pass
610
468
    
611
469
    # GetAllProperties - method
612
 
    @dbus.service.method(_interface, out_signature=u"a{sv}")
 
470
    @dbus.service.method(_interface, out_signature="a{sv}")
613
471
    def GetAllProperties(self):
614
472
        "D-Bus method"
615
473
        return dbus.Dictionary({
616
 
                dbus.String(u"name"):
 
474
                dbus.String("name"):
617
475
                    dbus.String(self.name, variant_level=1),
618
 
                dbus.String(u"fingerprint"):
 
476
                dbus.String("fingerprint"):
619
477
                    dbus.String(self.fingerprint, variant_level=1),
620
 
                dbus.String(u"host"):
 
478
                dbus.String("host"):
621
479
                    dbus.String(self.host, variant_level=1),
622
 
                dbus.String(u"created"):
623
 
                    self._datetime_to_dbus(self.created,
624
 
                                           variant_level=1),
625
 
                dbus.String(u"last_enabled"):
626
 
                    (self._datetime_to_dbus(self.last_enabled,
627
 
                                            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)
628
485
                     if self.last_enabled is not None
629
486
                     else dbus.Boolean(False, variant_level=1)),
630
 
                dbus.String(u"enabled"):
 
487
                dbus.String("enabled"):
631
488
                    dbus.Boolean(self.enabled, variant_level=1),
632
 
                dbus.String(u"last_checked_ok"):
633
 
                    (self._datetime_to_dbus(self.last_checked_ok,
634
 
                                            variant_level=1)
 
489
                dbus.String("last_checked_ok"):
 
490
                    (_datetime_to_dbus(self.last_checked_ok,
 
491
                                       variant_level=1)
635
492
                     if self.last_checked_ok is not None
636
493
                     else dbus.Boolean (False, variant_level=1)),
637
 
                dbus.String(u"timeout"):
 
494
                dbus.String("timeout"):
638
495
                    dbus.UInt64(self.timeout_milliseconds(),
639
496
                                variant_level=1),
640
 
                dbus.String(u"interval"):
 
497
                dbus.String("interval"):
641
498
                    dbus.UInt64(self.interval_milliseconds(),
642
499
                                variant_level=1),
643
 
                dbus.String(u"checker"):
 
500
                dbus.String("checker"):
644
501
                    dbus.String(self.checker_command,
645
502
                                variant_level=1),
646
 
                dbus.String(u"checker_running"):
 
503
                dbus.String("checker_running"):
647
504
                    dbus.Boolean(self.checker is not None,
648
505
                                 variant_level=1),
649
 
                dbus.String(u"object_path"):
650
 
                    dbus.ObjectPath(self.dbus_object_path,
651
 
                                    variant_level=1)
652
 
                }, signature=u"sv")
 
506
                }, signature="sv")
653
507
    
654
508
    # IsStillValid - method
655
 
    @dbus.service.method(_interface, out_signature=u"b")
656
 
    def IsStillValid(self):
657
 
        return self.still_valid()
 
509
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
 
510
                    (still_valid))
 
511
    IsStillValid.__name__ = "IsStillValid"
658
512
    
659
513
    # PropertyChanged - signal
660
 
    @dbus.service.signal(_interface, signature=u"sv")
 
514
    @dbus.service.signal(_interface, signature="sv")
661
515
    def PropertyChanged(self, property, value):
662
516
        "D-Bus signal"
663
517
        pass
664
518
    
665
 
    # ReceivedSecret - signal
666
 
    @dbus.service.signal(_interface)
667
 
    def ReceivedSecret(self):
668
 
        "D-Bus signal"
669
 
        pass
670
 
    
671
 
    # Rejected - signal
672
 
    @dbus.service.signal(_interface)
673
 
    def Rejected(self):
674
 
        "D-Bus signal"
675
 
        pass
676
 
    
677
519
    # SetChecker - method
678
 
    @dbus.service.method(_interface, in_signature=u"s")
 
520
    @dbus.service.method(_interface, in_signature="s")
679
521
    def SetChecker(self, checker):
680
522
        "D-Bus setter method"
681
523
        self.checker_command = checker
685
527
                                         variant_level=1))
686
528
    
687
529
    # SetHost - method
688
 
    @dbus.service.method(_interface, in_signature=u"s")
 
530
    @dbus.service.method(_interface, in_signature="s")
689
531
    def SetHost(self, host):
690
532
        "D-Bus setter method"
691
533
        self.host = host
694
536
                             dbus.String(self.host, variant_level=1))
695
537
    
696
538
    # SetInterval - method
697
 
    @dbus.service.method(_interface, in_signature=u"t")
 
539
    @dbus.service.method(_interface, in_signature="t")
698
540
    def SetInterval(self, milliseconds):
699
541
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
700
542
        # Emit D-Bus signal
703
545
                                          variant_level=1)))
704
546
    
705
547
    # SetSecret - method
706
 
    @dbus.service.method(_interface, in_signature=u"ay",
 
548
    @dbus.service.method(_interface, in_signature="ay",
707
549
                         byte_arrays=True)
708
550
    def SetSecret(self, secret):
709
551
        "D-Bus setter method"
710
552
        self.secret = str(secret)
711
553
    
712
554
    # SetTimeout - method
713
 
    @dbus.service.method(_interface, in_signature=u"t")
 
555
    @dbus.service.method(_interface, in_signature="t")
714
556
    def SetTimeout(self, milliseconds):
715
557
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
716
558
        # Emit D-Bus signal
719
561
                                          variant_level=1)))
720
562
    
721
563
    # Enable - method
722
 
    @dbus.service.method(_interface)
723
 
    def Enable(self):
724
 
        "D-Bus method"
725
 
        self.enable()
 
564
    Enable = dbus.service.method(_interface)(enable)
 
565
    Enable.__name__ = "Enable"
726
566
    
727
567
    # StartChecker - method
728
568
    @dbus.service.method(_interface)
737
577
        self.disable()
738
578
    
739
579
    # StopChecker - method
740
 
    @dbus.service.method(_interface)
741
 
    def StopChecker(self):
742
 
        self.stop_checker()
 
580
    StopChecker = dbus.service.method(_interface)(stop_checker)
 
581
    StopChecker.__name__ = "StopChecker"
743
582
    
744
583
    del _interface
745
584
 
746
585
 
747
 
class ClientHandler(socketserver.BaseRequestHandler, object):
748
 
    """A class to handle client connections.
749
 
    
750
 
    Instantiated once for each connection to handle it.
 
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.
751
647
    Note: This will run in its own forked process."""
752
648
    
753
649
    def handle(self):
754
650
        logger.info(u"TCP connection from: %s",
755
651
                    unicode(self.client_address))
756
 
        logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
757
 
        # Open IPC pipe to parent process
758
 
        with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
759
 
            session = (gnutls.connection
760
 
                       .ClientSession(self.request,
761
 
                                      gnutls.connection
762
 
                                      .X509Credentials()))
763
 
            
764
 
            line = self.request.makefile().readline()
765
 
            logger.debug(u"Protocol version: %r", line)
766
 
            try:
767
 
                if int(line.strip().split()[0]) > 1:
768
 
                    raise RuntimeError
769
 
            except (ValueError, IndexError, RuntimeError), error:
770
 
                logger.error(u"Unknown protocol version: %s", error)
771
 
                return
772
 
            
773
 
            # Note: gnutls.connection.X509Credentials is really a
774
 
            # generic GnuTLS certificate credentials object so long as
775
 
            # no X.509 keys are added to it.  Therefore, we can use it
776
 
            # here despite using OpenPGP certificates.
777
 
            
778
 
            #priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
779
 
            #                      u"+AES-256-CBC", u"+SHA1",
780
 
            #                      u"+COMP-NULL", u"+CTYPE-OPENPGP",
781
 
            #                      u"+DHE-DSS"))
782
 
            # Use a fallback default, since this MUST be set.
783
 
            priority = self.server.gnutls_priority
784
 
            if priority is None:
785
 
                priority = u"NORMAL"
786
 
            (gnutls.library.functions
787
 
             .gnutls_priority_set_direct(session._c_object,
788
 
                                         priority, None))
789
 
            
790
 
            try:
791
 
                session.handshake()
792
 
            except gnutls.errors.GNUTLSError, error:
793
 
                logger.warning(u"Handshake failed: %s", error)
794
 
                # Do not run session.bye() here: the session is not
795
 
                # established.  Just abandon the request.
796
 
                return
797
 
            logger.debug(u"Handshake succeeded")
798
 
            try:
799
 
                fpr = self.fingerprint(self.peer_certificate(session))
800
 
            except (TypeError, gnutls.errors.GNUTLSError), error:
801
 
                logger.warning(u"Bad certificate: %s", error)
802
 
                session.bye()
803
 
                return
804
 
            logger.debug(u"Fingerprint: %s", fpr)
805
 
            
806
 
            for c in self.server.clients:
807
 
                if c.fingerprint == fpr:
808
 
                    client = c
809
 
                    break
810
 
            else:
811
 
                ipc.write(u"NOTFOUND %s\n" % fpr)
812
 
                session.bye()
813
 
                return
814
 
            # Have to check if client.still_valid(), since it is
815
 
            # possible that the client timed out while establishing
816
 
            # the GnuTLS session.
817
 
            if not client.still_valid():
818
 
                ipc.write(u"INVALID %s\n" % client.name)
819
 
                session.bye()
820
 
                return
821
 
            ipc.write(u"SENDING %s\n" % client.name)
822
 
            sent_size = 0
823
 
            while sent_size < len(client.secret):
824
 
                sent = session.send(client.secret[sent_size:])
825
 
                logger.debug(u"Sent: %d, remaining: %d",
826
 
                             sent, len(client.secret)
827
 
                             - (sent_size + sent))
828
 
                sent_size += sent
829
 
            session.bye()
830
 
    
831
 
    @staticmethod
832
 
    def peer_certificate(session):
833
 
        "Return the peer's OpenPGP certificate as a bytestring"
834
 
        # If not an OpenPGP certificate...
835
 
        if (gnutls.library.functions
836
 
            .gnutls_certificate_type_get(session._c_object)
837
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
838
 
            # ...do the normal thing
839
 
            return session.peer_certificate
840
 
        list_size = ctypes.c_uint(1)
841
 
        cert_list = (gnutls.library.functions
842
 
                     .gnutls_certificate_get_peers
843
 
                     (session._c_object, ctypes.byref(list_size)))
844
 
        if not bool(cert_list) and list_size.value != 0:
845
 
            raise gnutls.errors.GNUTLSError(u"error getting peer"
846
 
                                            u" certificate")
847
 
        if list_size.value == 0:
848
 
            return None
849
 
        cert = cert_list[0]
850
 
        return ctypes.string_at(cert.data, cert.size)
851
 
    
852
 
    @staticmethod
853
 
    def fingerprint(openpgp):
854
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
855
 
        # New GnuTLS "datum" with the OpenPGP public key
856
 
        datum = (gnutls.library.types
857
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
858
 
                                             ctypes.POINTER
859
 
                                             (ctypes.c_ubyte)),
860
 
                                 ctypes.c_uint(len(openpgp))))
861
 
        # New empty GnuTLS certificate
862
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
863
 
        (gnutls.library.functions
864
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
865
 
        # Import the OpenPGP public key into the certificate
866
 
        (gnutls.library.functions
867
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
868
 
                                    gnutls.library.constants
869
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
870
 
        # Verify the self signature in the key
871
 
        crtverify = ctypes.c_uint()
872
 
        (gnutls.library.functions
873
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
874
 
                                         ctypes.byref(crtverify)))
875
 
        if crtverify.value != 0:
876
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
877
 
            raise (gnutls.errors.CertificateSecurityError
878
 
                   (u"Verify failed"))
879
 
        # New buffer for the fingerprint
880
 
        buf = ctypes.create_string_buffer(20)
881
 
        buf_len = ctypes.c_size_t()
882
 
        # Get the fingerprint from the certificate into the buffer
883
 
        (gnutls.library.functions
884
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
885
 
                                             ctypes.byref(buf_len)))
886
 
        # Deinit the certificate
887
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
888
 
        # Convert the buffer to a Python bytestring
889
 
        fpr = ctypes.string_at(buf, buf_len.value)
890
 
        # Convert the bytestring to hexadecimal notation
891
 
        hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
892
 
        return hex_fpr
893
 
 
894
 
 
895
 
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
896
 
    """Like socketserver.ForkingMixIn, but also pass a pipe."""
897
 
    def process_request(self, request, client_address):
898
 
        """Overrides and wraps the original process_request().
899
 
        
900
 
        This function creates a new pipe in self.pipe 
901
 
        """
902
 
        self.pipe = os.pipe()
903
 
        super(ForkingMixInWithPipe,
904
 
              self).process_request(request, client_address)
905
 
        os.close(self.pipe[1])  # close write end
906
 
        self.add_pipe(self.pipe[0])
907
 
    def add_pipe(self, pipe):
908
 
        """Dummy function; override as necessary"""
909
 
        os.close(pipe)
910
 
 
911
 
 
912
 
class IPv6_TCPServer(ForkingMixInWithPipe,
913
 
                     socketserver.TCPServer, object):
914
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
915
 
    
 
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.
916
726
    Attributes:
 
727
        settings:       Server settings
 
728
        clients:        Set() of Client objects
917
729
        enabled:        Boolean; whether this server is activated yet
918
 
        interface:      None or a network interface name (string)
919
 
        use_ipv6:       Boolean; to use IPv6 or not
920
730
    """
921
 
    def __init__(self, server_address, RequestHandlerClass,
922
 
                 interface=None, use_ipv6=True):
923
 
        self.interface = interface
924
 
        if use_ipv6:
925
 
            self.address_family = socket.AF_INET6
926
 
        socketserver.TCPServer.__init__(self, server_address,
927
 
                                        RequestHandlerClass)
 
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)
928
741
    def server_bind(self):
929
742
        """This overrides the normal server_bind() function
930
743
        to bind to an interface if one was specified, and also NOT to
931
744
        bind to an address or port if they were not specified."""
932
 
        if self.interface is not None:
933
 
            if SO_BINDTODEVICE is None:
934
 
                logger.error(u"SO_BINDTODEVICE does not exist;"
935
 
                             u" cannot bind to interface %s",
936
 
                             self.interface)
937
 
            else:
938
 
                try:
939
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
940
 
                                           SO_BINDTODEVICE,
941
 
                                           str(self.interface
942
 
                                               + u'\0'))
943
 
                except socket.error, error:
944
 
                    if error[0] == errno.EPERM:
945
 
                        logger.error(u"No permission to"
946
 
                                     u" bind to interface %s",
947
 
                                     self.interface)
948
 
                    elif error[0] == errno.ENOPROTOOPT:
949
 
                        logger.error(u"SO_BINDTODEVICE not available;"
950
 
                                     u" cannot bind to interface %s",
951
 
                                     self.interface)
952
 
                    else:
953
 
                        raise
 
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
954
759
        # Only bind(2) the socket if we really need to.
955
760
        if self.server_address[0] or self.server_address[1]:
956
761
            if not self.server_address[0]:
957
 
                if self.address_family == socket.AF_INET6:
958
 
                    any_address = u"::" # in6addr_any
959
 
                else:
960
 
                    any_address = socket.INADDR_ANY
961
 
                self.server_address = (any_address,
 
762
                in6addr_any = "::"
 
763
                self.server_address = (in6addr_any,
962
764
                                       self.server_address[1])
963
765
            elif not self.server_address[1]:
964
766
                self.server_address = (self.server_address[0],
965
767
                                       0)
966
 
#                 if self.interface:
 
768
#                 if self.settings["interface"]:
967
769
#                     self.server_address = (self.server_address[0],
968
770
#                                            0, # port
969
771
#                                            0, # flowinfo
970
772
#                                            if_nametoindex
971
 
#                                            (self.interface))
972
 
            return socketserver.TCPServer.server_bind(self)
973
 
 
974
 
 
975
 
class MandosServer(IPv6_TCPServer):
976
 
    """Mandos server.
977
 
    
978
 
    Attributes:
979
 
        clients:        set of Client objects
980
 
        gnutls_priority GnuTLS priority string
981
 
        use_dbus:       Boolean; to emit D-Bus signals or not
982
 
        clients:        set of Client objects
983
 
        gnutls_priority GnuTLS priority string
984
 
        use_dbus:       Boolean; to emit D-Bus signals or not
985
 
    
986
 
    Assumes a gobject.MainLoop event loop.
987
 
    """
988
 
    def __init__(self, server_address, RequestHandlerClass,
989
 
                 interface=None, use_ipv6=True, clients=None,
990
 
                 gnutls_priority=None, use_dbus=True):
991
 
        self.enabled = False
992
 
        self.clients = clients
993
 
        self.use_dbus = use_dbus
994
 
        self.gnutls_priority = gnutls_priority
995
 
        IPv6_TCPServer.__init__(self, server_address,
996
 
                                RequestHandlerClass,
997
 
                                interface = interface,
998
 
                                use_ipv6 = use_ipv6)
 
773
#                                            (self.settings
 
774
#                                             ["interface"]))
 
775
            return super(IPv6_TCPServer, self).server_bind()
999
776
    def server_activate(self):
1000
777
        if self.enabled:
1001
 
            return socketserver.TCPServer.server_activate(self)
 
778
            return super(IPv6_TCPServer, self).server_activate()
1002
779
    def enable(self):
1003
780
        self.enabled = True
1004
 
    def add_pipe(self, pipe):
1005
 
        # Call "handle_ipc" for both data and EOF events
1006
 
        gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1007
 
                             self.handle_ipc)
1008
 
    def handle_ipc(self, source, condition, file_objects={}):
1009
 
        condition_names = {
1010
 
            gobject.IO_IN: u"IN",   # There is data to read.
1011
 
            gobject.IO_OUT: u"OUT", # Data can be written (without
1012
 
                                    # blocking).
1013
 
            gobject.IO_PRI: u"PRI", # There is urgent data to read.
1014
 
            gobject.IO_ERR: u"ERR", # Error condition.
1015
 
            gobject.IO_HUP: u"HUP"  # Hung up (the connection has been
1016
 
                                    # broken, usually for pipes and
1017
 
                                    # sockets).
1018
 
            }
1019
 
        conditions_string = ' | '.join(name
1020
 
                                       for cond, name in
1021
 
                                       condition_names.iteritems()
1022
 
                                       if cond & condition)
1023
 
        logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1024
 
                     conditions_string)
1025
 
        
1026
 
        # Turn the pipe file descriptor into a Python file object
1027
 
        if source not in file_objects:
1028
 
            file_objects[source] = os.fdopen(source, u"r", 1)
1029
 
        
1030
 
        # Read a line from the file object
1031
 
        cmdline = file_objects[source].readline()
1032
 
        if not cmdline:             # Empty line means end of file
1033
 
            # close the IPC pipe
1034
 
            file_objects[source].close()
1035
 
            del file_objects[source]
1036
 
            
1037
 
            # Stop calling this function
1038
 
            return False
1039
 
        
1040
 
        logger.debug(u"IPC command: %r", cmdline)
1041
 
        
1042
 
        # Parse and act on command
1043
 
        cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1044
 
        
1045
 
        if cmd == u"NOTFOUND":
1046
 
            logger.warning(u"Client not found for fingerprint: %s",
1047
 
                           args)
1048
 
            if self.use_dbus:
1049
 
                # Emit D-Bus signal
1050
 
                mandos_dbus_service.ClientNotFound(args)
1051
 
        elif cmd == u"INVALID":
1052
 
            for client in self.clients:
1053
 
                if client.name == args:
1054
 
                    logger.warning(u"Client %s is invalid", args)
1055
 
                    if self.use_dbus:
1056
 
                        # Emit D-Bus signal
1057
 
                        client.Rejected()
1058
 
                    break
1059
 
            else:
1060
 
                logger.error(u"Unknown client %s is invalid", args)
1061
 
        elif cmd == u"SENDING":
1062
 
            for client in self.clients:
1063
 
                if client.name == args:
1064
 
                    logger.info(u"Sending secret to %s", client.name)
1065
 
                    client.checked_ok()
1066
 
                    if self.use_dbus:
1067
 
                        # Emit D-Bus signal
1068
 
                        client.ReceivedSecret()
1069
 
                    break
1070
 
            else:
1071
 
                logger.error(u"Sending secret to unknown client %s",
1072
 
                             args)
1073
 
        else:
1074
 
            logger.error(u"Unknown IPC command: %r", cmdline)
1075
 
        
1076
 
        # Keep calling this function
1077
 
        return True
1078
781
 
1079
782
 
1080
783
def string_to_delta(interval):
1081
784
    """Parse a string and return a datetime.timedelta
1082
 
    
1083
 
    >>> string_to_delta(u'7d')
 
785
 
 
786
    >>> string_to_delta('7d')
1084
787
    datetime.timedelta(7)
1085
 
    >>> string_to_delta(u'60s')
 
788
    >>> string_to_delta('60s')
1086
789
    datetime.timedelta(0, 60)
1087
 
    >>> string_to_delta(u'60m')
 
790
    >>> string_to_delta('60m')
1088
791
    datetime.timedelta(0, 3600)
1089
 
    >>> string_to_delta(u'24h')
 
792
    >>> string_to_delta('24h')
1090
793
    datetime.timedelta(1)
1091
794
    >>> string_to_delta(u'1w')
1092
795
    datetime.timedelta(7)
1093
 
    >>> string_to_delta(u'5m 30s')
 
796
    >>> string_to_delta('5m 30s')
1094
797
    datetime.timedelta(0, 330)
1095
798
    """
1096
799
    timevalue = datetime.timedelta(0)
1116
819
    return timevalue
1117
820
 
1118
821
 
 
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
 
1119
845
def if_nametoindex(interface):
1120
 
    """Call the C function if_nametoindex(), or equivalent
1121
 
    
1122
 
    Note: This function cannot accept a unicode string."""
 
846
    """Call the C function if_nametoindex(), or equivalent"""
1123
847
    global if_nametoindex
1124
848
    try:
1125
849
        if_nametoindex = (ctypes.cdll.LoadLibrary
1126
 
                          (ctypes.util.find_library(u"c"))
 
850
                          (ctypes.util.find_library("c"))
1127
851
                          .if_nametoindex)
1128
852
    except (OSError, AttributeError):
1129
 
        logger.warning(u"Doing if_nametoindex the hard way")
 
853
        if "struct" not in sys.modules:
 
854
            import struct
 
855
        if "fcntl" not in sys.modules:
 
856
            import fcntl
1130
857
        def if_nametoindex(interface):
1131
858
            "Get an interface index the hard way, i.e. using fcntl()"
1132
859
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1133
860
            with closing(socket.socket()) as s:
1134
861
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1135
 
                                    struct.pack(str(u"16s16x"),
1136
 
                                                interface))
1137
 
            interface_index = struct.unpack(str(u"I"),
1138
 
                                            ifreq[16:20])[0]
 
862
                                    struct.pack("16s16x", interface))
 
863
            interface_index = struct.unpack("I", ifreq[16:20])[0]
1139
864
            return interface_index
1140
865
    return if_nametoindex(interface)
1141
866
 
1142
867
 
1143
868
def daemon(nochdir = False, noclose = False):
1144
869
    """See daemon(3).  Standard BSD Unix function.
1145
 
    
1146
870
    This should really exist as os.daemon, but it doesn't (yet)."""
1147
871
    if os.fork():
1148
872
        sys.exit()
1149
873
    os.setsid()
1150
874
    if not nochdir:
1151
 
        os.chdir(u"/")
 
875
        os.chdir("/")
1152
876
    if os.fork():
1153
877
        sys.exit()
1154
878
    if not noclose:
1156
880
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1157
881
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1158
882
            raise OSError(errno.ENODEV,
1159
 
                          u"/dev/null not a character device")
 
883
                          "/dev/null not a character device")
1160
884
        os.dup2(null, sys.stdin.fileno())
1161
885
        os.dup2(null, sys.stdout.fileno())
1162
886
        os.dup2(null, sys.stderr.fileno())
1165
889
 
1166
890
 
1167
891
def main():
1168
 
    
1169
 
    ######################################################################
1170
 
    # Parsing of options, both command line and config file
1171
 
    
1172
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
1173
 
    parser.add_option("-i", u"--interface", type=u"string",
1174
 
                      metavar="IF", help=u"Bind to interface IF")
1175
 
    parser.add_option("-a", u"--address", type=u"string",
1176
 
                      help=u"Address to listen for requests on")
1177
 
    parser.add_option("-p", u"--port", type=u"int",
1178
 
                      help=u"Port number to receive requests on")
1179
 
    parser.add_option("--check", action=u"store_true",
1180
 
                      help=u"Run self-test")
1181
 
    parser.add_option("--debug", action=u"store_true",
1182
 
                      help=u"Debug mode; run in foreground and log to"
1183
 
                      u" terminal")
1184
 
    parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1185
 
                      u" priority string (see GnuTLS documentation)")
1186
 
    parser.add_option("--servicename", type=u"string",
1187
 
                      metavar=u"NAME", help=u"Zeroconf service name")
1188
 
    parser.add_option("--configdir", type=u"string",
1189
 
                      default=u"/etc/mandos", metavar=u"DIR",
1190
 
                      help=u"Directory to search for configuration"
1191
 
                      u" files")
1192
 
    parser.add_option("--no-dbus", action=u"store_false",
1193
 
                      dest=u"use_dbus", help=u"Do not provide D-Bus"
1194
 
                      u" system bus interface")
1195
 
    parser.add_option("--no-ipv6", action=u"store_false",
1196
 
                      dest=u"use_ipv6", help=u"Do not use IPv6")
 
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")
1197
916
    options = parser.parse_args()[0]
1198
917
    
1199
918
    if options.check:
1202
921
        sys.exit()
1203
922
    
1204
923
    # Default values for config file for server-global settings
1205
 
    server_defaults = { u"interface": u"",
1206
 
                        u"address": u"",
1207
 
                        u"port": u"",
1208
 
                        u"debug": u"False",
1209
 
                        u"priority":
1210
 
                        u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1211
 
                        u"servicename": u"Mandos",
1212
 
                        u"use_dbus": u"True",
1213
 
                        u"use_ipv6": u"True",
 
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",
1214
932
                        }
1215
933
    
1216
934
    # Parse config file for server-global settings
1217
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
935
    server_config = ConfigParser.SafeConfigParser(server_defaults)
1218
936
    del server_defaults
1219
 
    server_config.read(os.path.join(options.configdir,
1220
 
                                    u"mandos.conf"))
 
937
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
1221
938
    # Convert the SafeConfigParser object to a dict
1222
939
    server_settings = server_config.defaults()
1223
 
    # Use the appropriate methods on the non-string config options
1224
 
    for option in (u"debug", u"use_dbus", u"use_ipv6"):
1225
 
        server_settings[option] = server_config.getboolean(u"DEFAULT",
1226
 
                                                           option)
1227
 
    if server_settings["port"]:
1228
 
        server_settings["port"] = server_config.getint(u"DEFAULT",
1229
 
                                                       u"port")
 
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"))
1230
945
    del server_config
1231
946
    
1232
947
    # Override the settings from the config file with command line
1233
948
    # options, if set.
1234
 
    for option in (u"interface", u"address", u"port", u"debug",
1235
 
                   u"priority", u"servicename", u"configdir",
1236
 
                   u"use_dbus", u"use_ipv6"):
 
949
    for option in ("interface", "address", "port", "debug",
 
950
                   "priority", "servicename", "configdir",
 
951
                   "use_dbus"):
1237
952
        value = getattr(options, option)
1238
953
        if value is not None:
1239
954
            server_settings[option] = value
1240
955
    del options
1241
 
    # Force all strings to be unicode
1242
 
    for option in server_settings.keys():
1243
 
        if type(server_settings[option]) is str:
1244
 
            server_settings[option] = unicode(server_settings[option])
1245
956
    # Now we have our good server settings in "server_settings"
1246
957
    
1247
 
    ##################################################################
1248
 
    
1249
958
    # For convenience
1250
 
    debug = server_settings[u"debug"]
1251
 
    use_dbus = server_settings[u"use_dbus"]
1252
 
    use_ipv6 = server_settings[u"use_ipv6"]
 
959
    debug = server_settings["debug"]
 
960
    use_dbus = server_settings["use_dbus"]
1253
961
    
1254
962
    if not debug:
1255
963
        syslogger.setLevel(logging.WARNING)
1256
964
        console.setLevel(logging.WARNING)
1257
965
    
1258
 
    if server_settings[u"servicename"] != u"Mandos":
 
966
    if server_settings["servicename"] != "Mandos":
1259
967
        syslogger.setFormatter(logging.Formatter
1260
 
                               (u'Mandos (%s) [%%(process)d]:'
1261
 
                                u' %%(levelname)s: %%(message)s'
1262
 
                                % server_settings[u"servicename"]))
 
968
                               ('Mandos (%s): %%(levelname)s:'
 
969
                                ' %%(message)s'
 
970
                                % server_settings["servicename"]))
1263
971
    
1264
972
    # Parse config file with clients
1265
 
    client_defaults = { u"timeout": u"1h",
1266
 
                        u"interval": u"5m",
1267
 
                        u"checker": u"fping -q -- %%(host)s",
1268
 
                        u"host": u"",
 
973
    client_defaults = { "timeout": "1h",
 
974
                        "interval": "5m",
 
975
                        "checker": "fping -q -- %(host)s",
 
976
                        "host": "",
1269
977
                        }
1270
 
    client_config = configparser.SafeConfigParser(client_defaults)
1271
 
    client_config.read(os.path.join(server_settings[u"configdir"],
1272
 
                                    u"clients.conf"))
1273
 
    
1274
 
    global mandos_dbus_service
1275
 
    mandos_dbus_service = None
1276
 
    
1277
 
    clients = set()
1278
 
    tcp_server = MandosServer((server_settings[u"address"],
1279
 
                               server_settings[u"port"]),
1280
 
                              ClientHandler,
1281
 
                              interface=server_settings[u"interface"],
1282
 
                              use_ipv6=use_ipv6,
1283
 
                              clients=clients,
1284
 
                              gnutls_priority=
1285
 
                              server_settings[u"priority"],
1286
 
                              use_dbus=use_dbus)
1287
 
    pidfilename = u"/var/run/mandos.pid"
1288
 
    try:
1289
 
        pidfile = open(pidfilename, u"w")
1290
 
    except IOError:
1291
 
        logger.error(u"Could not open file %r", pidfilename)
1292
 
    
1293
 
    try:
1294
 
        uid = pwd.getpwnam(u"_mandos").pw_uid
1295
 
        gid = pwd.getpwnam(u"_mandos").pw_gid
 
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
1296
996
    except KeyError:
1297
997
        try:
1298
 
            uid = pwd.getpwnam(u"mandos").pw_uid
1299
 
            gid = pwd.getpwnam(u"mandos").pw_gid
 
998
            uid = pwd.getpwnam("mandos").pw_uid
1300
999
        except KeyError:
1301
1000
            try:
1302
 
                uid = pwd.getpwnam(u"nobody").pw_uid
1303
 
                gid = pwd.getpwnam(u"nobody").pw_gid
 
1001
                uid = pwd.getpwnam("nobody").pw_uid
1304
1002
            except KeyError:
1305
1003
                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:
1306
1013
                gid = 65534
1307
1014
    try:
 
1015
        os.setuid(uid)
1308
1016
        os.setgid(gid)
1309
 
        os.setuid(uid)
1310
1017
    except OSError, error:
1311
1018
        if error[0] != errno.EPERM:
1312
1019
            raise error
1313
1020
    
1314
 
    # Enable all possible GnuTLS debugging
1315
 
    if debug:
1316
 
        # "Use a log level over 10 to enable all debugging options."
1317
 
        # - GnuTLS manual
1318
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1319
 
        
1320
 
        @gnutls.library.types.gnutls_log_func
1321
 
        def debug_gnutls(level, string):
1322
 
            logger.debug(u"GnuTLS: %s", string[:-1])
1323
 
        
1324
 
        (gnutls.library.functions
1325
 
         .gnutls_global_set_log_function(debug_gnutls))
 
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"]))
1326
1027
    
1327
1028
    global main_loop
 
1029
    global bus
 
1030
    global server
1328
1031
    # From the Avahi example code
1329
1032
    DBusGMainLoop(set_as_default=True )
1330
1033
    main_loop = gobject.MainLoop()
1331
1034
    bus = dbus.SystemBus()
 
1035
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
1036
                                           avahi.DBUS_PATH_SERVER),
 
1037
                            avahi.DBUS_INTERFACE_SERVER)
1332
1038
    # End of Avahi example code
1333
1039
    if use_dbus:
1334
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1335
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1336
 
    service = AvahiService(name = server_settings[u"servicename"],
1337
 
                           servicetype = u"_mandos._tcp",
1338
 
                           protocol = protocol, bus = bus)
1339
 
    if server_settings["interface"]:
1340
 
        service.interface = (if_nametoindex
1341
 
                             (str(server_settings[u"interface"])))
 
1040
        bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
 
1041
                                        bus)
1342
1042
    
1343
 
    client_class = Client
1344
 
    if use_dbus:
1345
 
        client_class = functools.partial(ClientDBus, bus = bus)
1346
 
    clients.update(set(
1347
 
            client_class(name = section,
1348
 
                         config= dict(client_config.items(section)))
1349
 
            for section in client_config.sections()))
 
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()))
1350
1048
    if not clients:
1351
1049
        logger.warning(u"No clients defined")
1352
1050
    
1363
1061
        daemon()
1364
1062
    
1365
1063
    try:
1366
 
        with closing(pidfile):
1367
 
            pid = os.getpid()
1368
 
            pidfile.write(str(pid) + "\n")
 
1064
        pid = os.getpid()
 
1065
        pidfile.write(str(pid) + "\n")
 
1066
        pidfile.close()
1369
1067
        del pidfile
1370
1068
    except IOError:
1371
1069
        logger.error(u"Could not write to file %r with PID %d",
1377
1075
    
1378
1076
    def cleanup():
1379
1077
        "Cleanup function; run on exit"
1380
 
        service.cleanup()
 
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
1381
1084
        
1382
1085
        while clients:
1383
1086
            client = clients.pop()
1392
1095
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1393
1096
    
1394
1097
    if use_dbus:
1395
 
        class MandosDBusService(dbus.service.Object):
 
1098
        class MandosServer(dbus.service.Object):
1396
1099
            """A D-Bus proxy object"""
1397
1100
            def __init__(self):
1398
 
                dbus.service.Object.__init__(self, bus, u"/")
1399
 
            _interface = u"se.bsnet.fukt.Mandos"
1400
 
            
1401
 
            @dbus.service.signal(_interface, signature=u"oa{sv}")
 
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
1106
            def ClientAdded(self, objpath, properties):
1403
1107
                "D-Bus signal"
1404
1108
                pass
1405
 
            
1406
 
            @dbus.service.signal(_interface, signature=u"s")
1407
 
            def ClientNotFound(self, fingerprint):
1408
 
                "D-Bus signal"
1409
 
                pass
1410
 
            
1411
 
            @dbus.service.signal(_interface, signature=u"os")
1412
 
            def ClientRemoved(self, objpath, name):
1413
 
                "D-Bus signal"
1414
 
                pass
1415
 
            
1416
 
            @dbus.service.method(_interface, out_signature=u"ao")
 
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")
1417
1116
            def GetAllClients(self):
1418
 
                "D-Bus method"
1419
1117
                return dbus.Array(c.dbus_object_path for c in clients)
1420
 
            
1421
 
            @dbus.service.method(_interface,
1422
 
                                 out_signature=u"a{oa{sv}}")
 
1118
 
 
1119
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
1423
1120
            def GetAllClientsWithProperties(self):
1424
 
                "D-Bus method"
1425
1121
                return dbus.Dictionary(
1426
1122
                    ((c.dbus_object_path, c.GetAllProperties())
1427
1123
                     for c in clients),
1428
 
                    signature=u"oa{sv}")
1429
 
            
1430
 
            @dbus.service.method(_interface, in_signature=u"o")
 
1124
                    signature="oa{sv}")
 
1125
 
 
1126
            @dbus.service.method(_interface, in_signature="o")
1431
1127
            def RemoveClient(self, object_path):
1432
 
                "D-Bus method"
1433
1128
                for c in clients:
1434
1129
                    if c.dbus_object_path == object_path:
1435
1130
                        clients.remove(c)
1436
 
                        c.remove_from_connection()
1437
1131
                        # Don't signal anything except ClientRemoved
1438
 
                        c.disable(signal=False)
 
1132
                        c.use_dbus = False
 
1133
                        c.disable()
1439
1134
                        # Emit D-Bus signal
1440
 
                        self.ClientRemoved(object_path, c.name)
 
1135
                        self.ClientRemoved(object_path)
1441
1136
                        return
1442
1137
                raise KeyError
1443
 
            
 
1138
            @dbus.service.method(_interface)
 
1139
            def Quit(self):
 
1140
                main_loop.quit()
 
1141
 
1444
1142
            del _interface
1445
 
        
1446
 
        mandos_dbus_service = MandosDBusService()
 
1143
    
 
1144
        mandos_server = MandosServer()
1447
1145
    
1448
1146
    for client in clients:
1449
1147
        if use_dbus:
1450
1148
            # Emit D-Bus signal
1451
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path,
1452
 
                                            client.GetAllProperties())
 
1149
            mandos_server.ClientAdded(client.dbus_object_path,
 
1150
                                      client.GetAllProperties())
1453
1151
        client.enable()
1454
1152
    
1455
1153
    tcp_server.enable()
1457
1155
    
1458
1156
    # Find out what port we got
1459
1157
    service.port = tcp_server.socket.getsockname()[1]
1460
 
    if use_ipv6:
1461
 
        logger.info(u"Now listening on address %r, port %d,"
1462
 
                    " flowinfo %d, scope_id %d"
1463
 
                    % tcp_server.socket.getsockname())
1464
 
    else:                       # IPv4
1465
 
        logger.info(u"Now listening on address %r, port %d"
1466
 
                    % tcp_server.socket.getsockname())
 
1158
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
1159
                u" scope_id %d" % tcp_server.socket.getsockname())
1467
1160
    
1468
1161
    #service.interface = tcp_server.socket.getsockname()[3]
1469
1162
    
1470
1163
    try:
1471
1164
        # From the Avahi example code
 
1165
        server.connect_to_signal("StateChanged", server_state_changed)
1472
1166
        try:
1473
 
            service.activate()
 
1167
            server_state_changed(server.GetState())
1474
1168
        except dbus.exceptions.DBusException, error:
1475
1169
            logger.critical(u"DBusException: %s", error)
1476
1170
            sys.exit(1)
1488
1182
        sys.exit(1)
1489
1183
    except KeyboardInterrupt:
1490
1184
        if debug:
1491
 
            print >> sys.stderr
1492
 
        logger.debug(u"Server received KeyboardInterrupt")
1493
 
    logger.debug(u"Server exiting")
 
1185
            print
1494
1186
 
1495
1187
if __name__ == '__main__':
1496
1188
    main()