/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2010-09-12 03:00:40 UTC
  • Revision ID: teddy@fukt.bsnet.se-20100912030040-b0uopyennste9fdh
Documentation changes:

* DBUS-API: New file documenting the server D-Bus interface.

* clients.conf: Add examples of new approval settings.

* debian/mandos.docs: Added "DBUS-API".

* mandos-clients.conf.xml (OPTIONS): Added "approved_by_default",
                                     "approval_delay", and
                                     "approval_duration".
* mandos.xml (D-BUS INTERFACE): Refer to the "DBUS-API" file.
  (BUGS): Remove mention of lack of a remote query interface.

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Lines of Context:
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" 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
38
import optparse
39
39
import datetime
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
56
55
import logging
57
56
import logging.handlers
58
57
import pwd
59
 
from contextlib import closing
 
58
import contextlib
 
59
import struct
 
60
import fcntl
 
61
import functools
 
62
import cPickle as pickle
 
63
import multiprocessing
60
64
 
61
65
import dbus
62
66
import dbus.service
65
69
from dbus.mainloop.glib import DBusGMainLoop
66
70
import ctypes
67
71
import ctypes.util
68
 
 
69
 
version = "1.0.5"
70
 
 
71
 
logger = logging.Logger('mandos')
 
72
import xml.dom.minidom
 
73
import inspect
 
74
 
 
75
try:
 
76
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
 
77
except AttributeError:
 
78
    try:
 
79
        from IN import SO_BINDTODEVICE
 
80
    except ImportError:
 
81
        SO_BINDTODEVICE = None
 
82
 
 
83
 
 
84
version = "1.0.14"
 
85
 
 
86
#logger = logging.getLogger(u'mandos')
 
87
logger = logging.Logger(u'mandos')
72
88
syslogger = (logging.handlers.SysLogHandler
73
89
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
90
              address = "/dev/log"))
75
91
syslogger.setFormatter(logging.Formatter
76
 
                       ('Mandos [%(process)d]: %(levelname)s:'
77
 
                        ' %(message)s'))
 
92
                       (u'Mandos [%(process)d]: %(levelname)s:'
 
93
                        u' %(message)s'))
78
94
logger.addHandler(syslogger)
79
95
 
80
96
console = logging.StreamHandler()
81
 
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
 
                                       ' %(levelname)s: %(message)s'))
 
97
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
 
98
                                       u' %(levelname)s:'
 
99
                                       u' %(message)s'))
83
100
logger.addHandler(console)
84
101
 
85
102
class AvahiError(Exception):
98
115
 
99
116
class AvahiService(object):
100
117
    """An Avahi (Zeroconf) service.
 
118
    
101
119
    Attributes:
102
120
    interface: integer; avahi.IF_UNSPEC or an interface index.
103
121
               Used to optionally bind to the specified interface.
104
 
    name: string; Example: 'Mandos'
105
 
    type: string; Example: '_mandos._tcp'.
 
122
    name: string; Example: u'Mandos'
 
123
    type: string; Example: u'_mandos._tcp'.
106
124
                  See <http://www.dns-sd.org/ServiceTypes.html>
107
125
    port: integer; what port to announce
108
126
    TXT: list of strings; TXT record for the service
111
129
    max_renames: integer; maximum number of renames
112
130
    rename_count: integer; counter so we only rename after collisions
113
131
                  a sensible number of times
 
132
    group: D-Bus Entry Group
 
133
    server: D-Bus Server
 
134
    bus: dbus.SystemBus()
114
135
    """
115
136
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
137
                 servicetype = None, port = None, TXT = None,
117
 
                 domain = "", host = "", max_renames = 32768):
 
138
                 domain = u"", host = u"", max_renames = 32768,
 
139
                 protocol = avahi.PROTO_UNSPEC, bus = None):
118
140
        self.interface = interface
119
141
        self.name = name
120
142
        self.type = servicetype
124
146
        self.host = host
125
147
        self.rename_count = 0
126
148
        self.max_renames = max_renames
 
149
        self.protocol = protocol
 
150
        self.group = None       # our entry group
 
151
        self.server = None
 
152
        self.bus = bus
127
153
    def rename(self):
128
154
        """Derived from the Avahi example code"""
129
155
        if self.rename_count >= self.max_renames:
131
157
                            u" after %i retries, exiting.",
132
158
                            self.rename_count)
133
159
            raise AvahiServiceError(u"Too many renames")
134
 
        self.name = server.GetAlternativeServiceName(self.name)
 
160
        self.name = unicode(self.server.GetAlternativeServiceName(self.name))
135
161
        logger.info(u"Changing Zeroconf service name to %r ...",
136
 
                    str(self.name))
 
162
                    self.name)
137
163
        syslogger.setFormatter(logging.Formatter
138
 
                               ('Mandos (%s): %%(levelname)s:'
139
 
                                ' %%(message)s' % self.name))
 
164
                               (u'Mandos (%s) [%%(process)d]:'
 
165
                                u' %%(levelname)s: %%(message)s'
 
166
                                % self.name))
140
167
        self.remove()
141
 
        self.add()
 
168
        try:
 
169
            self.add()
 
170
        except dbus.exceptions.DBusException, error:
 
171
            logger.critical(u"DBusException: %s", error)
 
172
            self.cleanup()
 
173
            os._exit(1)
142
174
        self.rename_count += 1
143
175
    def remove(self):
144
176
        """Derived from the Avahi example code"""
145
 
        if group is not None:
146
 
            group.Reset()
 
177
        if self.group is not None:
 
178
            self.group.Reset()
147
179
    def add(self):
148
180
        """Derived from the Avahi example code"""
149
 
        global group
150
 
        if group is None:
151
 
            group = dbus.Interface(bus.get_object
152
 
                                   (avahi.DBUS_NAME,
153
 
                                    server.EntryGroupNew()),
154
 
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
155
 
            group.connect_to_signal('StateChanged',
156
 
                                    entry_group_state_changed)
 
181
        if self.group is None:
 
182
            self.group = dbus.Interface(
 
183
                self.bus.get_object(avahi.DBUS_NAME,
 
184
                                    self.server.EntryGroupNew()),
 
185
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
186
            self.group.connect_to_signal('StateChanged',
 
187
                                         self
 
188
                                         .entry_group_state_changed)
157
189
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
158
 
                     service.name, service.type)
159
 
        group.AddService(
160
 
                self.interface,         # interface
161
 
                avahi.PROTO_INET6,      # protocol
162
 
                dbus.UInt32(0),         # flags
163
 
                self.name, self.type,
164
 
                self.domain, self.host,
165
 
                dbus.UInt16(self.port),
166
 
                avahi.string_array_to_txt_array(self.TXT))
167
 
        group.Commit()
168
 
 
169
 
# From the Avahi example code:
170
 
group = None                            # our entry group
171
 
# End of Avahi example code
172
 
 
173
 
 
174
 
def _datetime_to_dbus(dt, variant_level=0):
175
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
176
 
    return dbus.String(dt.isoformat(), variant_level=variant_level)
177
 
 
178
 
 
179
 
class Client(dbus.service.Object):
 
190
                     self.name, self.type)
 
191
        self.group.AddService(
 
192
            self.interface,
 
193
            self.protocol,
 
194
            dbus.UInt32(0),     # flags
 
195
            self.name, self.type,
 
196
            self.domain, self.host,
 
197
            dbus.UInt16(self.port),
 
198
            avahi.string_array_to_txt_array(self.TXT))
 
199
        self.group.Commit()
 
200
    def entry_group_state_changed(self, state, error):
 
201
        """Derived from the Avahi example code"""
 
202
        logger.debug(u"Avahi entry group state change: %i", state)
 
203
        
 
204
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
205
            logger.debug(u"Zeroconf service established.")
 
206
        elif state == avahi.ENTRY_GROUP_COLLISION:
 
207
            logger.warning(u"Zeroconf service name collision.")
 
208
            self.rename()
 
209
        elif state == avahi.ENTRY_GROUP_FAILURE:
 
210
            logger.critical(u"Avahi: Error in group state changed %s",
 
211
                            unicode(error))
 
212
            raise AvahiGroupError(u"State changed: %s"
 
213
                                  % unicode(error))
 
214
    def cleanup(self):
 
215
        """Derived from the Avahi example code"""
 
216
        if self.group is not None:
 
217
            self.group.Free()
 
218
            self.group = None
 
219
    def server_state_changed(self, state):
 
220
        """Derived from the Avahi example code"""
 
221
        logger.debug(u"Avahi server state change: %i", state)
 
222
        if state == avahi.SERVER_COLLISION:
 
223
            logger.error(u"Zeroconf server name collision")
 
224
            self.remove()
 
225
        elif state == avahi.SERVER_RUNNING:
 
226
            self.add()
 
227
    def activate(self):
 
228
        """Derived from the Avahi example code"""
 
229
        if self.server is None:
 
230
            self.server = dbus.Interface(
 
231
                self.bus.get_object(avahi.DBUS_NAME,
 
232
                                    avahi.DBUS_PATH_SERVER),
 
233
                avahi.DBUS_INTERFACE_SERVER)
 
234
        self.server.connect_to_signal(u"StateChanged",
 
235
                                 self.server_state_changed)
 
236
        self.server_state_changed(self.server.GetState())
 
237
 
 
238
 
 
239
class Client(object):
180
240
    """A representation of a client host served by this server.
 
241
    
181
242
    Attributes:
182
243
    name:       string; from the config file, used in log messages and
183
244
                        D-Bus identifiers
190
251
    enabled:    bool()
191
252
    last_checked_ok: datetime.datetime(); (UTC) or None
192
253
    timeout:    datetime.timedelta(); How long from last_checked_ok
193
 
                                      until this client is invalid
 
254
                                      until this client is disabled
194
255
    interval:   datetime.timedelta(); How often to start a new checker
195
256
    disable_hook:  If set, called by disable() as disable_hook(self)
196
257
    checker:    subprocess.Popen(); a running checker process used
197
258
                                    to see if the client lives.
198
259
                                    'None' if no process is running.
199
260
    checker_initiator_tag: a gobject event source tag, or None
200
 
    disable_initiator_tag:    - '' -
 
261
    disable_initiator_tag: - '' -
201
262
    checker_callback_tag:  - '' -
202
263
    checker_command: string; External command which is run to check if
203
264
                     client lives.  %() expansions are done at
204
265
                     runtime with vars(self) as dict, so that for
205
266
                     instance %(name)s can be used in the command.
206
 
    use_dbus: bool(); Whether to provide D-Bus interface and signals
207
 
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
 
267
    current_checker_command: string; current running checker_command
 
268
    approval_delay: datetime.timedelta(); Time to wait for approval
 
269
    _approved:   bool(); 'None' if not yet approved/disapproved
 
270
    approval_duration: datetime.timedelta(); Duration of one approval
208
271
    """
 
272
    
 
273
    @staticmethod
 
274
    def _timedelta_to_milliseconds(td):
 
275
        "Convert a datetime.timedelta() to milliseconds"
 
276
        return ((td.days * 24 * 60 * 60 * 1000)
 
277
                + (td.seconds * 1000)
 
278
                + (td.microseconds // 1000))
 
279
    
209
280
    def timeout_milliseconds(self):
210
281
        "Return the 'timeout' attribute in milliseconds"
211
 
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
212
 
                + (self.timeout.seconds * 1000)
213
 
                + (self.timeout.microseconds // 1000))
 
282
        return self._timedelta_to_milliseconds(self.timeout)
214
283
    
215
284
    def interval_milliseconds(self):
216
285
        "Return the 'interval' attribute in milliseconds"
217
 
        return ((self.interval.days * 24 * 60 * 60 * 1000)
218
 
                + (self.interval.seconds * 1000)
219
 
                + (self.interval.microseconds // 1000))
 
286
        return self._timedelta_to_milliseconds(self.interval)
 
287
 
 
288
    def approval_delay_milliseconds(self):
 
289
        return self._timedelta_to_milliseconds(self.approval_delay)
220
290
    
221
 
    def __init__(self, name = None, disable_hook=None, config=None,
222
 
                 use_dbus=True):
 
291
    def __init__(self, name = None, disable_hook=None, config=None):
223
292
        """Note: the 'checker' key in 'config' sets the
224
293
        'checker_command' attribute and *not* the 'checker'
225
294
        attribute."""
227
296
        if config is None:
228
297
            config = {}
229
298
        logger.debug(u"Creating client %r", self.name)
230
 
        self.use_dbus = False   # During __init__
231
299
        # Uppercase and remove spaces from fingerprint for later
232
300
        # comparison purposes with return value from the fingerprint()
233
301
        # function
234
 
        self.fingerprint = (config["fingerprint"].upper()
 
302
        self.fingerprint = (config[u"fingerprint"].upper()
235
303
                            .replace(u" ", u""))
236
304
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
237
 
        if "secret" in config:
238
 
            self.secret = config["secret"].decode(u"base64")
239
 
        elif "secfile" in config:
240
 
            with closing(open(os.path.expanduser
241
 
                              (os.path.expandvars
242
 
                               (config["secfile"])))) as secfile:
 
305
        if u"secret" in config:
 
306
            self.secret = config[u"secret"].decode(u"base64")
 
307
        elif u"secfile" in config:
 
308
            with open(os.path.expanduser(os.path.expandvars
 
309
                                         (config[u"secfile"])),
 
310
                      "rb") as secfile:
243
311
                self.secret = secfile.read()
244
312
        else:
245
313
            raise TypeError(u"No secret or secfile for client %s"
246
314
                            % self.name)
247
 
        self.host = config.get("host", "")
 
315
        self.host = config.get(u"host", u"")
248
316
        self.created = datetime.datetime.utcnow()
249
317
        self.enabled = False
250
318
        self.last_enabled = None
251
319
        self.last_checked_ok = None
252
 
        self.timeout = string_to_delta(config["timeout"])
253
 
        self.interval = string_to_delta(config["interval"])
 
320
        self.timeout = string_to_delta(config[u"timeout"])
 
321
        self.interval = string_to_delta(config[u"interval"])
254
322
        self.disable_hook = disable_hook
255
323
        self.checker = None
256
324
        self.checker_initiator_tag = None
257
325
        self.disable_initiator_tag = None
258
326
        self.checker_callback_tag = None
259
 
        self.checker_command = config["checker"]
 
327
        self.checker_command = config[u"checker"]
 
328
        self.current_checker_command = None
260
329
        self.last_connect = None
261
 
        # Only now, when this client is initialized, can it show up on
262
 
        # the D-Bus
263
 
        self.use_dbus = use_dbus
264
 
        if self.use_dbus:
265
 
            self.dbus_object_path = (dbus.ObjectPath
266
 
                                     ("/clients/"
267
 
                                      + self.name.replace(".", "_")))
268
 
            dbus.service.Object.__init__(self, bus,
269
 
                                         self.dbus_object_path)
 
330
        self._approved = None
 
331
        self.approved_by_default = config.get(u"approved_by_default",
 
332
                                              True)
 
333
        self.approvals_pending = 0
 
334
        self.approval_delay = string_to_delta(
 
335
            config[u"approval_delay"])
 
336
        self.approval_duration = string_to_delta(
 
337
            config[u"approval_duration"])
 
338
        self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
270
339
    
 
340
    def send_changedstate(self):
 
341
        self.changedstate.acquire()
 
342
        self.changedstate.notify_all()
 
343
        self.changedstate.release()
 
344
        
271
345
    def enable(self):
272
346
        """Start this client's checker and timeout hooks"""
 
347
        if getattr(self, u"enabled", False):
 
348
            # Already enabled
 
349
            return
 
350
        self.send_changedstate()
273
351
        self.last_enabled = datetime.datetime.utcnow()
274
352
        # Schedule a new checker to be started an 'interval' from now,
275
353
        # and every interval from then on.
276
354
        self.checker_initiator_tag = (gobject.timeout_add
277
355
                                      (self.interval_milliseconds(),
278
356
                                       self.start_checker))
279
 
        # Also start a new checker *right now*.
280
 
        self.start_checker()
281
357
        # Schedule a disable() when 'timeout' has passed
282
358
        self.disable_initiator_tag = (gobject.timeout_add
283
359
                                   (self.timeout_milliseconds(),
284
360
                                    self.disable))
285
361
        self.enabled = True
286
 
        if self.use_dbus:
287
 
            # Emit D-Bus signals
288
 
            self.PropertyChanged(dbus.String(u"enabled"),
289
 
                                 dbus.Boolean(True, variant_level=1))
290
 
            self.PropertyChanged(dbus.String(u"last_enabled"),
291
 
                                 (_datetime_to_dbus(self.last_enabled,
292
 
                                                    variant_level=1)))
 
362
        # Also start a new checker *right now*.
 
363
        self.start_checker()
293
364
    
294
 
    def disable(self):
 
365
    def disable(self, quiet=True):
295
366
        """Disable this client."""
296
367
        if not getattr(self, "enabled", False):
297
368
            return False
298
 
        logger.info(u"Disabling client %s", self.name)
299
 
        if getattr(self, "disable_initiator_tag", False):
 
369
        if not quiet:
 
370
            self.send_changedstate()
 
371
        if not quiet:
 
372
            logger.info(u"Disabling client %s", self.name)
 
373
        if getattr(self, u"disable_initiator_tag", False):
300
374
            gobject.source_remove(self.disable_initiator_tag)
301
375
            self.disable_initiator_tag = None
302
 
        if getattr(self, "checker_initiator_tag", False):
 
376
        if getattr(self, u"checker_initiator_tag", False):
303
377
            gobject.source_remove(self.checker_initiator_tag)
304
378
            self.checker_initiator_tag = None
305
379
        self.stop_checker()
306
380
        if self.disable_hook:
307
381
            self.disable_hook(self)
308
382
        self.enabled = False
309
 
        if self.use_dbus:
310
 
            # Emit D-Bus signal
311
 
            self.PropertyChanged(dbus.String(u"enabled"),
312
 
                                 dbus.Boolean(False, variant_level=1))
313
383
        # Do not run this again if called by a gobject.timeout_add
314
384
        return False
315
385
    
321
391
        """The checker has completed, so take appropriate actions."""
322
392
        self.checker_callback_tag = None
323
393
        self.checker = None
324
 
        if self.use_dbus:
325
 
            # Emit D-Bus signal
326
 
            self.PropertyChanged(dbus.String(u"checker_running"),
327
 
                                 dbus.Boolean(False, variant_level=1))
328
394
        if os.WIFEXITED(condition):
329
395
            exitstatus = os.WEXITSTATUS(condition)
330
396
            if exitstatus == 0:
334
400
            else:
335
401
                logger.info(u"Checker for %(name)s failed",
336
402
                            vars(self))
337
 
            if self.use_dbus:
338
 
                # Emit D-Bus signal
339
 
                self.CheckerCompleted(dbus.Int16(exitstatus),
340
 
                                      dbus.Int64(condition),
341
 
                                      dbus.String(command))
342
403
        else:
343
404
            logger.warning(u"Checker for %(name)s crashed?",
344
405
                           vars(self))
345
 
            if self.use_dbus:
346
 
                # Emit D-Bus signal
347
 
                self.CheckerCompleted(dbus.Int16(-1),
348
 
                                      dbus.Int64(condition),
349
 
                                      dbus.String(command))
350
406
    
351
407
    def checked_ok(self):
352
408
        """Bump up the timeout for this client.
 
409
        
353
410
        This should only be called when the client has been seen,
354
411
        alive and well.
355
412
        """
358
415
        self.disable_initiator_tag = (gobject.timeout_add
359
416
                                      (self.timeout_milliseconds(),
360
417
                                       self.disable))
361
 
        if self.use_dbus:
362
 
            # Emit D-Bus signal
363
 
            self.PropertyChanged(
364
 
                dbus.String(u"last_checked_ok"),
365
 
                (_datetime_to_dbus(self.last_checked_ok,
366
 
                                   variant_level=1)))
367
418
    
368
419
    def start_checker(self):
369
420
        """Start a new checker subprocess if one is not running.
 
421
        
370
422
        If a checker already exists, leave it running and do
371
423
        nothing."""
372
424
        # The reason for not killing a running checker is that if we
375
427
        # client would inevitably timeout, since no checker would get
376
428
        # a chance to run to completion.  If we instead leave running
377
429
        # checkers alone, the checker would have to take more time
378
 
        # than 'timeout' for the client to be declared invalid, which
379
 
        # is as it should be.
 
430
        # than 'timeout' for the client to be disabled, which is as it
 
431
        # should be.
 
432
        
 
433
        # If a checker exists, make sure it is not a zombie
 
434
        try:
 
435
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
436
        except (AttributeError, OSError), error:
 
437
            if (isinstance(error, OSError)
 
438
                and error.errno != errno.ECHILD):
 
439
                raise error
 
440
        else:
 
441
            if pid:
 
442
                logger.warning(u"Checker was a zombie")
 
443
                gobject.source_remove(self.checker_callback_tag)
 
444
                self.checker_callback(pid, status,
 
445
                                      self.current_checker_command)
 
446
        # Start a new checker if needed
380
447
        if self.checker is None:
381
448
            try:
382
449
                # In case checker_command has exactly one % operator
383
450
                command = self.checker_command % self.host
384
451
            except TypeError:
385
452
                # Escape attributes for the shell
386
 
                escaped_attrs = dict((key, re.escape(str(val)))
 
453
                escaped_attrs = dict((key,
 
454
                                      re.escape(unicode(str(val),
 
455
                                                        errors=
 
456
                                                        u'replace')))
387
457
                                     for key, val in
388
458
                                     vars(self).iteritems())
389
459
                try:
392
462
                    logger.error(u'Could not format string "%s":'
393
463
                                 u' %s', self.checker_command, error)
394
464
                    return True # Try again later
 
465
            self.current_checker_command = command
395
466
            try:
396
467
                logger.info(u"Starting checker %r for %s",
397
468
                            command, self.name)
401
472
                # always replaced by /dev/null.)
402
473
                self.checker = subprocess.Popen(command,
403
474
                                                close_fds=True,
404
 
                                                shell=True, cwd="/")
405
 
                if self.use_dbus:
406
 
                    # Emit D-Bus signal
407
 
                    self.CheckerStarted(command)
408
 
                    self.PropertyChanged(
409
 
                        dbus.String("checker_running"),
410
 
                        dbus.Boolean(True, variant_level=1))
 
475
                                                shell=True, cwd=u"/")
411
476
                self.checker_callback_tag = (gobject.child_watch_add
412
477
                                             (self.checker.pid,
413
478
                                              self.checker_callback,
414
479
                                              data=command))
 
480
                # The checker may have completed before the gobject
 
481
                # watch was added.  Check for this.
 
482
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
483
                if pid:
 
484
                    gobject.source_remove(self.checker_callback_tag)
 
485
                    self.checker_callback(pid, status, command)
415
486
            except OSError, error:
416
487
                logger.error(u"Failed to start subprocess: %s",
417
488
                             error)
423
494
        if self.checker_callback_tag:
424
495
            gobject.source_remove(self.checker_callback_tag)
425
496
            self.checker_callback_tag = None
426
 
        if getattr(self, "checker", None) is None:
 
497
        if getattr(self, u"checker", None) is None:
427
498
            return
428
499
        logger.debug(u"Stopping checker for %(name)s", vars(self))
429
500
        try:
430
501
            os.kill(self.checker.pid, signal.SIGTERM)
431
 
            #os.sleep(0.5)
 
502
            #time.sleep(0.5)
432
503
            #if self.checker.poll() is None:
433
504
            #    os.kill(self.checker.pid, signal.SIGKILL)
434
505
        except OSError, error:
435
506
            if error.errno != errno.ESRCH: # No such process
436
507
                raise
437
508
        self.checker = None
438
 
        if self.use_dbus:
439
 
            self.PropertyChanged(dbus.String(u"checker_running"),
440
 
                                 dbus.Boolean(False, variant_level=1))
441
 
    
442
 
    def still_valid(self):
443
 
        """Has the timeout not yet passed for this client?"""
444
 
        if not getattr(self, "enabled", False):
445
 
            return False
446
 
        now = datetime.datetime.utcnow()
447
 
        if self.last_checked_ok is None:
448
 
            return now < (self.created + self.timeout)
449
 
        else:
450
 
            return now < (self.last_checked_ok + self.timeout)
451
 
    
452
 
    ## D-Bus methods & signals
 
509
 
 
510
def dbus_service_property(dbus_interface, signature=u"v",
 
511
                          access=u"readwrite", byte_arrays=False):
 
512
    """Decorators for marking methods of a DBusObjectWithProperties to
 
513
    become properties on the D-Bus.
 
514
    
 
515
    The decorated method will be called with no arguments by "Get"
 
516
    and with one argument by "Set".
 
517
    
 
518
    The parameters, where they are supported, are the same as
 
519
    dbus.service.method, except there is only "signature", since the
 
520
    type from Get() and the type sent to Set() is the same.
 
521
    """
 
522
    # Encoding deeply encoded byte arrays is not supported yet by the
 
523
    # "Set" method, so we fail early here:
 
524
    if byte_arrays and signature != u"ay":
 
525
        raise ValueError(u"Byte arrays not supported for non-'ay'"
 
526
                         u" signature %r" % signature)
 
527
    def decorator(func):
 
528
        func._dbus_is_property = True
 
529
        func._dbus_interface = dbus_interface
 
530
        func._dbus_signature = signature
 
531
        func._dbus_access = access
 
532
        func._dbus_name = func.__name__
 
533
        if func._dbus_name.endswith(u"_dbus_property"):
 
534
            func._dbus_name = func._dbus_name[:-14]
 
535
        func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
 
536
        return func
 
537
    return decorator
 
538
 
 
539
 
 
540
class DBusPropertyException(dbus.exceptions.DBusException):
 
541
    """A base class for D-Bus property-related exceptions
 
542
    """
 
543
    def __unicode__(self):
 
544
        return unicode(str(self))
 
545
 
 
546
 
 
547
class DBusPropertyAccessException(DBusPropertyException):
 
548
    """A property's access permissions disallows an operation.
 
549
    """
 
550
    pass
 
551
 
 
552
 
 
553
class DBusPropertyNotFound(DBusPropertyException):
 
554
    """An attempt was made to access a non-existing property.
 
555
    """
 
556
    pass
 
557
 
 
558
 
 
559
class DBusObjectWithProperties(dbus.service.Object):
 
560
    """A D-Bus object with properties.
 
561
 
 
562
    Classes inheriting from this can use the dbus_service_property
 
563
    decorator to expose methods as D-Bus properties.  It exposes the
 
564
    standard Get(), Set(), and GetAll() methods on the D-Bus.
 
565
    """
 
566
    
 
567
    @staticmethod
 
568
    def _is_dbus_property(obj):
 
569
        return getattr(obj, u"_dbus_is_property", False)
 
570
    
 
571
    def _get_all_dbus_properties(self):
 
572
        """Returns a generator of (name, attribute) pairs
 
573
        """
 
574
        return ((prop._dbus_name, prop)
 
575
                for name, prop in
 
576
                inspect.getmembers(self, self._is_dbus_property))
 
577
    
 
578
    def _get_dbus_property(self, interface_name, property_name):
 
579
        """Returns a bound method if one exists which is a D-Bus
 
580
        property with the specified name and interface.
 
581
        """
 
582
        for name in (property_name,
 
583
                     property_name + u"_dbus_property"):
 
584
            prop = getattr(self, name, None)
 
585
            if (prop is None
 
586
                or not self._is_dbus_property(prop)
 
587
                or prop._dbus_name != property_name
 
588
                or (interface_name and prop._dbus_interface
 
589
                    and interface_name != prop._dbus_interface)):
 
590
                continue
 
591
            return prop
 
592
        # No such property
 
593
        raise DBusPropertyNotFound(self.dbus_object_path + u":"
 
594
                                   + interface_name + u"."
 
595
                                   + property_name)
 
596
    
 
597
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
 
598
                         out_signature=u"v")
 
599
    def Get(self, interface_name, property_name):
 
600
        """Standard D-Bus property Get() method, see D-Bus standard.
 
601
        """
 
602
        prop = self._get_dbus_property(interface_name, property_name)
 
603
        if prop._dbus_access == u"write":
 
604
            raise DBusPropertyAccessException(property_name)
 
605
        value = prop()
 
606
        if not hasattr(value, u"variant_level"):
 
607
            return value
 
608
        return type(value)(value, variant_level=value.variant_level+1)
 
609
    
 
610
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
 
611
    def Set(self, interface_name, property_name, value):
 
612
        """Standard D-Bus property Set() method, see D-Bus standard.
 
613
        """
 
614
        prop = self._get_dbus_property(interface_name, property_name)
 
615
        if prop._dbus_access == u"read":
 
616
            raise DBusPropertyAccessException(property_name)
 
617
        if prop._dbus_get_args_options[u"byte_arrays"]:
 
618
            # The byte_arrays option is not supported yet on
 
619
            # signatures other than "ay".
 
620
            if prop._dbus_signature != u"ay":
 
621
                raise ValueError
 
622
            value = dbus.ByteArray(''.join(unichr(byte)
 
623
                                           for byte in value))
 
624
        prop(value)
 
625
    
 
626
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
 
627
                         out_signature=u"a{sv}")
 
628
    def GetAll(self, interface_name):
 
629
        """Standard D-Bus property GetAll() method, see D-Bus
 
630
        standard.
 
631
 
 
632
        Note: Will not include properties with access="write".
 
633
        """
 
634
        all = {}
 
635
        for name, prop in self._get_all_dbus_properties():
 
636
            if (interface_name
 
637
                and interface_name != prop._dbus_interface):
 
638
                # Interface non-empty but did not match
 
639
                continue
 
640
            # Ignore write-only properties
 
641
            if prop._dbus_access == u"write":
 
642
                continue
 
643
            value = prop()
 
644
            if not hasattr(value, u"variant_level"):
 
645
                all[name] = value
 
646
                continue
 
647
            all[name] = type(value)(value, variant_level=
 
648
                                    value.variant_level+1)
 
649
        return dbus.Dictionary(all, signature=u"sv")
 
650
    
 
651
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
652
                         out_signature=u"s",
 
653
                         path_keyword='object_path',
 
654
                         connection_keyword='connection')
 
655
    def Introspect(self, object_path, connection):
 
656
        """Standard D-Bus method, overloaded to insert property tags.
 
657
        """
 
658
        xmlstring = dbus.service.Object.Introspect(self, object_path,
 
659
                                                   connection)
 
660
        try:
 
661
            document = xml.dom.minidom.parseString(xmlstring)
 
662
            def make_tag(document, name, prop):
 
663
                e = document.createElement(u"property")
 
664
                e.setAttribute(u"name", name)
 
665
                e.setAttribute(u"type", prop._dbus_signature)
 
666
                e.setAttribute(u"access", prop._dbus_access)
 
667
                return e
 
668
            for if_tag in document.getElementsByTagName(u"interface"):
 
669
                for tag in (make_tag(document, name, prop)
 
670
                            for name, prop
 
671
                            in self._get_all_dbus_properties()
 
672
                            if prop._dbus_interface
 
673
                            == if_tag.getAttribute(u"name")):
 
674
                    if_tag.appendChild(tag)
 
675
                # Add the names to the return values for the
 
676
                # "org.freedesktop.DBus.Properties" methods
 
677
                if (if_tag.getAttribute(u"name")
 
678
                    == u"org.freedesktop.DBus.Properties"):
 
679
                    for cn in if_tag.getElementsByTagName(u"method"):
 
680
                        if cn.getAttribute(u"name") == u"Get":
 
681
                            for arg in cn.getElementsByTagName(u"arg"):
 
682
                                if (arg.getAttribute(u"direction")
 
683
                                    == u"out"):
 
684
                                    arg.setAttribute(u"name", u"value")
 
685
                        elif cn.getAttribute(u"name") == u"GetAll":
 
686
                            for arg in cn.getElementsByTagName(u"arg"):
 
687
                                if (arg.getAttribute(u"direction")
 
688
                                    == u"out"):
 
689
                                    arg.setAttribute(u"name", u"props")
 
690
            xmlstring = document.toxml(u"utf-8")
 
691
            document.unlink()
 
692
        except (AttributeError, xml.dom.DOMException,
 
693
                xml.parsers.expat.ExpatError), error:
 
694
            logger.error(u"Failed to override Introspection method",
 
695
                         error)
 
696
        return xmlstring
 
697
 
 
698
 
 
699
class ClientDBus(Client, DBusObjectWithProperties):
 
700
    """A Client class using D-Bus
 
701
    
 
702
    Attributes:
 
703
    dbus_object_path: dbus.ObjectPath
 
704
    bus: dbus.SystemBus()
 
705
    """
 
706
    # dbus.service.Object doesn't use super(), so we can't either.
 
707
    
 
708
    def __init__(self, bus = None, *args, **kwargs):
 
709
        self._approvals_pending = 0
 
710
        self.bus = bus
 
711
        Client.__init__(self, *args, **kwargs)
 
712
        # Only now, when this client is initialized, can it show up on
 
713
        # the D-Bus
 
714
        self.dbus_object_path = (dbus.ObjectPath
 
715
                                 (u"/clients/"
 
716
                                  + self.name.replace(u".", u"_")))
 
717
        DBusObjectWithProperties.__init__(self, self.bus,
 
718
                                          self.dbus_object_path)
 
719
        
 
720
    def _get_approvals_pending(self):
 
721
        return self._approvals_pending
 
722
    def _set_approvals_pending(self, value):
 
723
        old_value = self._approvals_pending
 
724
        self._approvals_pending = value
 
725
        bval = bool(value)
 
726
        if (hasattr(self, "dbus_object_path")
 
727
            and bval is not bool(old_value)):
 
728
            dbus_bool = dbus.Boolean(bval, variant_level=1)
 
729
            self.PropertyChanged(dbus.String(u"ApprovalPending"),
 
730
                                 dbus_bool)
 
731
 
 
732
    approvals_pending = property(_get_approvals_pending,
 
733
                                 _set_approvals_pending)
 
734
    del _get_approvals_pending, _set_approvals_pending
 
735
    
 
736
    @staticmethod
 
737
    def _datetime_to_dbus(dt, variant_level=0):
 
738
        """Convert a UTC datetime.datetime() to a D-Bus type."""
 
739
        return dbus.String(dt.isoformat(),
 
740
                           variant_level=variant_level)
 
741
    
 
742
    def enable(self):
 
743
        oldstate = getattr(self, u"enabled", False)
 
744
        r = Client.enable(self)
 
745
        if oldstate != self.enabled:
 
746
            # Emit D-Bus signals
 
747
            self.PropertyChanged(dbus.String(u"Enabled"),
 
748
                                 dbus.Boolean(True, variant_level=1))
 
749
            self.PropertyChanged(
 
750
                dbus.String(u"LastEnabled"),
 
751
                self._datetime_to_dbus(self.last_enabled,
 
752
                                       variant_level=1))
 
753
        return r
 
754
    
 
755
    def disable(self, quiet = False):
 
756
        oldstate = getattr(self, u"enabled", False)
 
757
        r = Client.disable(self, quiet=quiet)
 
758
        if not quiet and oldstate != self.enabled:
 
759
            # Emit D-Bus signal
 
760
            self.PropertyChanged(dbus.String(u"Enabled"),
 
761
                                 dbus.Boolean(False, variant_level=1))
 
762
        return r
 
763
    
 
764
    def __del__(self, *args, **kwargs):
 
765
        try:
 
766
            self.remove_from_connection()
 
767
        except LookupError:
 
768
            pass
 
769
        if hasattr(DBusObjectWithProperties, u"__del__"):
 
770
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
 
771
        Client.__del__(self, *args, **kwargs)
 
772
    
 
773
    def checker_callback(self, pid, condition, command,
 
774
                         *args, **kwargs):
 
775
        self.checker_callback_tag = None
 
776
        self.checker = None
 
777
        # Emit D-Bus signal
 
778
        self.PropertyChanged(dbus.String(u"CheckerRunning"),
 
779
                             dbus.Boolean(False, variant_level=1))
 
780
        if os.WIFEXITED(condition):
 
781
            exitstatus = os.WEXITSTATUS(condition)
 
782
            # Emit D-Bus signal
 
783
            self.CheckerCompleted(dbus.Int16(exitstatus),
 
784
                                  dbus.Int64(condition),
 
785
                                  dbus.String(command))
 
786
        else:
 
787
            # Emit D-Bus signal
 
788
            self.CheckerCompleted(dbus.Int16(-1),
 
789
                                  dbus.Int64(condition),
 
790
                                  dbus.String(command))
 
791
        
 
792
        return Client.checker_callback(self, pid, condition, command,
 
793
                                       *args, **kwargs)
 
794
    
 
795
    def checked_ok(self, *args, **kwargs):
 
796
        r = Client.checked_ok(self, *args, **kwargs)
 
797
        # Emit D-Bus signal
 
798
        self.PropertyChanged(
 
799
            dbus.String(u"LastCheckedOK"),
 
800
            (self._datetime_to_dbus(self.last_checked_ok,
 
801
                                    variant_level=1)))
 
802
        return r
 
803
    
 
804
    def start_checker(self, *args, **kwargs):
 
805
        old_checker = self.checker
 
806
        if self.checker is not None:
 
807
            old_checker_pid = self.checker.pid
 
808
        else:
 
809
            old_checker_pid = None
 
810
        r = Client.start_checker(self, *args, **kwargs)
 
811
        # Only if new checker process was started
 
812
        if (self.checker is not None
 
813
            and old_checker_pid != self.checker.pid):
 
814
            # Emit D-Bus signal
 
815
            self.CheckerStarted(self.current_checker_command)
 
816
            self.PropertyChanged(
 
817
                dbus.String(u"CheckerRunning"),
 
818
                dbus.Boolean(True, variant_level=1))
 
819
        return r
 
820
    
 
821
    def stop_checker(self, *args, **kwargs):
 
822
        old_checker = getattr(self, u"checker", None)
 
823
        r = Client.stop_checker(self, *args, **kwargs)
 
824
        if (old_checker is not None
 
825
            and getattr(self, u"checker", None) is None):
 
826
            self.PropertyChanged(dbus.String(u"CheckerRunning"),
 
827
                                 dbus.Boolean(False, variant_level=1))
 
828
        return r
 
829
 
 
830
    def _reset_approved(self):
 
831
        self._approved = None
 
832
        return False
 
833
    
 
834
    def approve(self, value=True):
 
835
        self.send_changedstate()
 
836
        self._approved = value
 
837
        gobject.timeout_add(self._timedelta_to_milliseconds
 
838
                            (self.approval_duration),
 
839
                            self._reset_approved)
 
840
    
 
841
    
 
842
    ## D-Bus methods, signals & properties
453
843
    _interface = u"se.bsnet.fukt.Mandos.Client"
454
844
    
455
 
    # CheckedOK - method
456
 
    CheckedOK = dbus.service.method(_interface)(checked_ok)
457
 
    CheckedOK.__name__ = "CheckedOK"
 
845
    ## Signals
458
846
    
459
847
    # CheckerCompleted - signal
460
 
    @dbus.service.signal(_interface, signature="nxs")
 
848
    @dbus.service.signal(_interface, signature=u"nxs")
461
849
    def CheckerCompleted(self, exitcode, waitstatus, command):
462
850
        "D-Bus signal"
463
851
        pass
464
852
    
465
853
    # CheckerStarted - signal
466
 
    @dbus.service.signal(_interface, signature="s")
 
854
    @dbus.service.signal(_interface, signature=u"s")
467
855
    def CheckerStarted(self, command):
468
856
        "D-Bus signal"
469
857
        pass
470
858
    
471
 
    # GetAllProperties - method
472
 
    @dbus.service.method(_interface, out_signature="a{sv}")
473
 
    def GetAllProperties(self):
474
 
        "D-Bus method"
475
 
        return dbus.Dictionary({
476
 
                dbus.String("name"):
477
 
                    dbus.String(self.name, variant_level=1),
478
 
                dbus.String("fingerprint"):
479
 
                    dbus.String(self.fingerprint, variant_level=1),
480
 
                dbus.String("host"):
481
 
                    dbus.String(self.host, variant_level=1),
482
 
                dbus.String("created"):
483
 
                    _datetime_to_dbus(self.created, variant_level=1),
484
 
                dbus.String("last_enabled"):
485
 
                    (_datetime_to_dbus(self.last_enabled,
486
 
                                       variant_level=1)
487
 
                     if self.last_enabled is not None
488
 
                     else dbus.Boolean(False, variant_level=1)),
489
 
                dbus.String("enabled"):
490
 
                    dbus.Boolean(self.enabled, variant_level=1),
491
 
                dbus.String("last_checked_ok"):
492
 
                    (_datetime_to_dbus(self.last_checked_ok,
493
 
                                       variant_level=1)
494
 
                     if self.last_checked_ok is not None
495
 
                     else dbus.Boolean (False, variant_level=1)),
496
 
                dbus.String("timeout"):
497
 
                    dbus.UInt64(self.timeout_milliseconds(),
498
 
                                variant_level=1),
499
 
                dbus.String("interval"):
500
 
                    dbus.UInt64(self.interval_milliseconds(),
501
 
                                variant_level=1),
502
 
                dbus.String("checker"):
503
 
                    dbus.String(self.checker_command,
504
 
                                variant_level=1),
505
 
                dbus.String("checker_running"):
506
 
                    dbus.Boolean(self.checker is not None,
507
 
                                 variant_level=1),
508
 
                dbus.String("object_path"):
509
 
                    dbus.ObjectPath(self.dbus_object_path,
510
 
                                    variant_level=1)
511
 
                }, signature="sv")
512
 
    
513
 
    # IsStillValid - method
514
 
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
515
 
                    (still_valid))
516
 
    IsStillValid.__name__ = "IsStillValid"
517
 
    
518
859
    # PropertyChanged - signal
519
 
    @dbus.service.signal(_interface, signature="sv")
 
860
    @dbus.service.signal(_interface, signature=u"sv")
520
861
    def PropertyChanged(self, property, value):
521
862
        "D-Bus signal"
522
863
        pass
523
864
    
524
 
    # SetChecker - method
525
 
    @dbus.service.method(_interface, in_signature="s")
526
 
    def SetChecker(self, checker):
527
 
        "D-Bus setter method"
528
 
        self.checker_command = checker
529
 
        # Emit D-Bus signal
530
 
        self.PropertyChanged(dbus.String(u"checker"),
531
 
                             dbus.String(self.checker_command,
532
 
                                         variant_level=1))
533
 
    
534
 
    # SetHost - method
535
 
    @dbus.service.method(_interface, in_signature="s")
536
 
    def SetHost(self, host):
537
 
        "D-Bus setter method"
538
 
        self.host = host
539
 
        # Emit D-Bus signal
540
 
        self.PropertyChanged(dbus.String(u"host"),
541
 
                             dbus.String(self.host, variant_level=1))
542
 
    
543
 
    # SetInterval - method
544
 
    @dbus.service.method(_interface, in_signature="t")
545
 
    def SetInterval(self, milliseconds):
546
 
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
547
 
        # Emit D-Bus signal
548
 
        self.PropertyChanged(dbus.String(u"interval"),
549
 
                             (dbus.UInt64(self.interval_milliseconds(),
550
 
                                          variant_level=1)))
551
 
    
552
 
    # SetSecret - method
553
 
    @dbus.service.method(_interface, in_signature="ay",
554
 
                         byte_arrays=True)
555
 
    def SetSecret(self, secret):
556
 
        "D-Bus setter method"
557
 
        self.secret = str(secret)
558
 
    
559
 
    # SetTimeout - method
560
 
    @dbus.service.method(_interface, in_signature="t")
561
 
    def SetTimeout(self, milliseconds):
562
 
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
563
 
        # Emit D-Bus signal
564
 
        self.PropertyChanged(dbus.String(u"timeout"),
565
 
                             (dbus.UInt64(self.timeout_milliseconds(),
566
 
                                          variant_level=1)))
 
865
    # GotSecret - signal
 
866
    @dbus.service.signal(_interface)
 
867
    def GotSecret(self):
 
868
        """D-Bus signal
 
869
        Is sent after a successful transfer of secret from the Mandos
 
870
        server to mandos-client
 
871
        """
 
872
        pass
 
873
    
 
874
    # Rejected - signal
 
875
    @dbus.service.signal(_interface, signature=u"s")
 
876
    def Rejected(self, reason):
 
877
        "D-Bus signal"
 
878
        pass
 
879
    
 
880
    # NeedApproval - signal
 
881
    @dbus.service.signal(_interface, signature=u"tb")
 
882
    def NeedApproval(self, timeout, default):
 
883
        "D-Bus signal"
 
884
        pass
 
885
    
 
886
    ## Methods
 
887
 
 
888
    # Approve - method
 
889
    @dbus.service.method(_interface, in_signature=u"b")
 
890
    def Approve(self, value):
 
891
        self.approve(value)
 
892
 
 
893
    # CheckedOK - method
 
894
    @dbus.service.method(_interface)
 
895
    def CheckedOK(self):
 
896
        return self.checked_ok()
567
897
    
568
898
    # Enable - method
569
 
    Enable = dbus.service.method(_interface)(enable)
570
 
    Enable.__name__ = "Enable"
 
899
    @dbus.service.method(_interface)
 
900
    def Enable(self):
 
901
        "D-Bus method"
 
902
        self.enable()
571
903
    
572
904
    # StartChecker - method
573
905
    @dbus.service.method(_interface)
582
914
        self.disable()
583
915
    
584
916
    # StopChecker - method
585
 
    StopChecker = dbus.service.method(_interface)(stop_checker)
586
 
    StopChecker.__name__ = "StopChecker"
 
917
    @dbus.service.method(_interface)
 
918
    def StopChecker(self):
 
919
        self.stop_checker()
 
920
    
 
921
    ## Properties
 
922
    
 
923
    # ApprovalPending - property
 
924
    @dbus_service_property(_interface, signature=u"b", access=u"read")
 
925
    def ApprovalPending_dbus_property(self):
 
926
        return dbus.Boolean(bool(self.approvals_pending))
 
927
    
 
928
    # ApprovedByDefault - property
 
929
    @dbus_service_property(_interface, signature=u"b",
 
930
                           access=u"readwrite")
 
931
    def ApprovedByDefault_dbus_property(self, value=None):
 
932
        if value is None:       # get
 
933
            return dbus.Boolean(self.approved_by_default)
 
934
        self.approved_by_default = bool(value)
 
935
        # Emit D-Bus signal
 
936
        self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
 
937
                             dbus.Boolean(value, variant_level=1))
 
938
    
 
939
    # ApprovalDelay - property
 
940
    @dbus_service_property(_interface, signature=u"t",
 
941
                           access=u"readwrite")
 
942
    def ApprovalDelay_dbus_property(self, value=None):
 
943
        if value is None:       # get
 
944
            return dbus.UInt64(self.approval_delay_milliseconds())
 
945
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
 
946
        # Emit D-Bus signal
 
947
        self.PropertyChanged(dbus.String(u"ApprovalDelay"),
 
948
                             dbus.UInt64(value, variant_level=1))
 
949
    
 
950
    # ApprovalDuration - property
 
951
    @dbus_service_property(_interface, signature=u"t",
 
952
                           access=u"readwrite")
 
953
    def ApprovalDuration_dbus_property(self, value=None):
 
954
        if value is None:       # get
 
955
            return dbus.UInt64(self._timedelta_to_milliseconds(
 
956
                    self.approval_duration))
 
957
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
 
958
        # Emit D-Bus signal
 
959
        self.PropertyChanged(dbus.String(u"ApprovalDuration"),
 
960
                             dbus.UInt64(value, variant_level=1))
 
961
    
 
962
    # Name - property
 
963
    @dbus_service_property(_interface, signature=u"s", access=u"read")
 
964
    def Name_dbus_property(self):
 
965
        return dbus.String(self.name)
 
966
    
 
967
    # Fingerprint - property
 
968
    @dbus_service_property(_interface, signature=u"s", access=u"read")
 
969
    def Fingerprint_dbus_property(self):
 
970
        return dbus.String(self.fingerprint)
 
971
    
 
972
    # Host - property
 
973
    @dbus_service_property(_interface, signature=u"s",
 
974
                           access=u"readwrite")
 
975
    def Host_dbus_property(self, value=None):
 
976
        if value is None:       # get
 
977
            return dbus.String(self.host)
 
978
        self.host = value
 
979
        # Emit D-Bus signal
 
980
        self.PropertyChanged(dbus.String(u"Host"),
 
981
                             dbus.String(value, variant_level=1))
 
982
    
 
983
    # Created - property
 
984
    @dbus_service_property(_interface, signature=u"s", access=u"read")
 
985
    def Created_dbus_property(self):
 
986
        return dbus.String(self._datetime_to_dbus(self.created))
 
987
    
 
988
    # LastEnabled - property
 
989
    @dbus_service_property(_interface, signature=u"s", access=u"read")
 
990
    def LastEnabled_dbus_property(self):
 
991
        if self.last_enabled is None:
 
992
            return dbus.String(u"")
 
993
        return dbus.String(self._datetime_to_dbus(self.last_enabled))
 
994
    
 
995
    # Enabled - property
 
996
    @dbus_service_property(_interface, signature=u"b",
 
997
                           access=u"readwrite")
 
998
    def Enabled_dbus_property(self, value=None):
 
999
        if value is None:       # get
 
1000
            return dbus.Boolean(self.enabled)
 
1001
        if value:
 
1002
            self.enable()
 
1003
        else:
 
1004
            self.disable()
 
1005
    
 
1006
    # LastCheckedOK - property
 
1007
    @dbus_service_property(_interface, signature=u"s",
 
1008
                           access=u"readwrite")
 
1009
    def LastCheckedOK_dbus_property(self, value=None):
 
1010
        if value is not None:
 
1011
            self.checked_ok()
 
1012
            return
 
1013
        if self.last_checked_ok is None:
 
1014
            return dbus.String(u"")
 
1015
        return dbus.String(self._datetime_to_dbus(self
 
1016
                                                  .last_checked_ok))
 
1017
    
 
1018
    # Timeout - property
 
1019
    @dbus_service_property(_interface, signature=u"t",
 
1020
                           access=u"readwrite")
 
1021
    def Timeout_dbus_property(self, value=None):
 
1022
        if value is None:       # get
 
1023
            return dbus.UInt64(self.timeout_milliseconds())
 
1024
        self.timeout = datetime.timedelta(0, 0, 0, value)
 
1025
        # Emit D-Bus signal
 
1026
        self.PropertyChanged(dbus.String(u"Timeout"),
 
1027
                             dbus.UInt64(value, variant_level=1))
 
1028
        if getattr(self, u"disable_initiator_tag", None) is None:
 
1029
            return
 
1030
        # Reschedule timeout
 
1031
        gobject.source_remove(self.disable_initiator_tag)
 
1032
        self.disable_initiator_tag = None
 
1033
        time_to_die = (self.
 
1034
                       _timedelta_to_milliseconds((self
 
1035
                                                   .last_checked_ok
 
1036
                                                   + self.timeout)
 
1037
                                                  - datetime.datetime
 
1038
                                                  .utcnow()))
 
1039
        if time_to_die <= 0:
 
1040
            # The timeout has passed
 
1041
            self.disable()
 
1042
        else:
 
1043
            self.disable_initiator_tag = (gobject.timeout_add
 
1044
                                          (time_to_die, self.disable))
 
1045
    
 
1046
    # Interval - property
 
1047
    @dbus_service_property(_interface, signature=u"t",
 
1048
                           access=u"readwrite")
 
1049
    def Interval_dbus_property(self, value=None):
 
1050
        if value is None:       # get
 
1051
            return dbus.UInt64(self.interval_milliseconds())
 
1052
        self.interval = datetime.timedelta(0, 0, 0, value)
 
1053
        # Emit D-Bus signal
 
1054
        self.PropertyChanged(dbus.String(u"Interval"),
 
1055
                             dbus.UInt64(value, variant_level=1))
 
1056
        if getattr(self, u"checker_initiator_tag", None) is None:
 
1057
            return
 
1058
        # Reschedule checker run
 
1059
        gobject.source_remove(self.checker_initiator_tag)
 
1060
        self.checker_initiator_tag = (gobject.timeout_add
 
1061
                                      (value, self.start_checker))
 
1062
        self.start_checker()    # Start one now, too
 
1063
 
 
1064
    # Checker - property
 
1065
    @dbus_service_property(_interface, signature=u"s",
 
1066
                           access=u"readwrite")
 
1067
    def Checker_dbus_property(self, value=None):
 
1068
        if value is None:       # get
 
1069
            return dbus.String(self.checker_command)
 
1070
        self.checker_command = value
 
1071
        # Emit D-Bus signal
 
1072
        self.PropertyChanged(dbus.String(u"Checker"),
 
1073
                             dbus.String(self.checker_command,
 
1074
                                         variant_level=1))
 
1075
    
 
1076
    # CheckerRunning - property
 
1077
    @dbus_service_property(_interface, signature=u"b",
 
1078
                           access=u"readwrite")
 
1079
    def CheckerRunning_dbus_property(self, value=None):
 
1080
        if value is None:       # get
 
1081
            return dbus.Boolean(self.checker is not None)
 
1082
        if value:
 
1083
            self.start_checker()
 
1084
        else:
 
1085
            self.stop_checker()
 
1086
    
 
1087
    # ObjectPath - property
 
1088
    @dbus_service_property(_interface, signature=u"o", access=u"read")
 
1089
    def ObjectPath_dbus_property(self):
 
1090
        return self.dbus_object_path # is already a dbus.ObjectPath
 
1091
    
 
1092
    # Secret = property
 
1093
    @dbus_service_property(_interface, signature=u"ay",
 
1094
                           access=u"write", byte_arrays=True)
 
1095
    def Secret_dbus_property(self, value):
 
1096
        self.secret = str(value)
587
1097
    
588
1098
    del _interface
589
1099
 
590
1100
 
591
 
def peer_certificate(session):
592
 
    "Return the peer's OpenPGP certificate as a bytestring"
593
 
    # If not an OpenPGP certificate...
594
 
    if (gnutls.library.functions
595
 
        .gnutls_certificate_type_get(session._c_object)
596
 
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
597
 
        # ...do the normal thing
598
 
        return session.peer_certificate
599
 
    list_size = ctypes.c_uint(1)
600
 
    cert_list = (gnutls.library.functions
601
 
                 .gnutls_certificate_get_peers
602
 
                 (session._c_object, ctypes.byref(list_size)))
603
 
    if not bool(cert_list) and list_size.value != 0:
604
 
        raise gnutls.errors.GNUTLSError("error getting peer"
605
 
                                        " certificate")
606
 
    if list_size.value == 0:
607
 
        return None
608
 
    cert = cert_list[0]
609
 
    return ctypes.string_at(cert.data, cert.size)
610
 
 
611
 
 
612
 
def fingerprint(openpgp):
613
 
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
614
 
    # New GnuTLS "datum" with the OpenPGP public key
615
 
    datum = (gnutls.library.types
616
 
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
617
 
                                         ctypes.POINTER
618
 
                                         (ctypes.c_ubyte)),
619
 
                             ctypes.c_uint(len(openpgp))))
620
 
    # New empty GnuTLS certificate
621
 
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
622
 
    (gnutls.library.functions
623
 
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
624
 
    # Import the OpenPGP public key into the certificate
625
 
    (gnutls.library.functions
626
 
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
627
 
                                gnutls.library.constants
628
 
                                .GNUTLS_OPENPGP_FMT_RAW))
629
 
    # Verify the self signature in the key
630
 
    crtverify = ctypes.c_uint()
631
 
    (gnutls.library.functions
632
 
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
633
 
    if crtverify.value != 0:
634
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
635
 
        raise gnutls.errors.CertificateSecurityError("Verify failed")
636
 
    # New buffer for the fingerprint
637
 
    buf = ctypes.create_string_buffer(20)
638
 
    buf_len = ctypes.c_size_t()
639
 
    # Get the fingerprint from the certificate into the buffer
640
 
    (gnutls.library.functions
641
 
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
642
 
                                         ctypes.byref(buf_len)))
643
 
    # Deinit the certificate
644
 
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
645
 
    # Convert the buffer to a Python bytestring
646
 
    fpr = ctypes.string_at(buf, buf_len.value)
647
 
    # Convert the bytestring to hexadecimal notation
648
 
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
649
 
    return hex_fpr
650
 
 
651
 
 
652
 
class TCP_handler(SocketServer.BaseRequestHandler, object):
653
 
    """A TCP request handler class.
654
 
    Instantiated by IPv6_TCPServer for each request to handle it.
 
1101
class ProxyClient(object):
 
1102
    def __init__(self, child_pipe, fpr, address):
 
1103
        self._pipe = child_pipe
 
1104
        self._pipe.send(('init', fpr, address))
 
1105
        if not self._pipe.recv():
 
1106
            raise KeyError()
 
1107
 
 
1108
    def __getattribute__(self, name):
 
1109
        if(name == '_pipe'):
 
1110
            return super(ProxyClient, self).__getattribute__(name)
 
1111
        self._pipe.send(('getattr', name))
 
1112
        data = self._pipe.recv()
 
1113
        if data[0] == 'data':
 
1114
            return data[1]
 
1115
        if data[0] == 'function':
 
1116
            def func(*args, **kwargs):
 
1117
                self._pipe.send(('funcall', name, args, kwargs))
 
1118
                return self._pipe.recv()[1]
 
1119
            return func
 
1120
 
 
1121
    def __setattr__(self, name, value):
 
1122
        if(name == '_pipe'):
 
1123
            return super(ProxyClient, self).__setattr__(name, value)
 
1124
        self._pipe.send(('setattr', name, value))
 
1125
 
 
1126
 
 
1127
class ClientHandler(socketserver.BaseRequestHandler, object):
 
1128
    """A class to handle client connections.
 
1129
    
 
1130
    Instantiated once for each connection to handle it.
655
1131
    Note: This will run in its own forked process."""
656
1132
    
657
1133
    def handle(self):
658
 
        logger.info(u"TCP connection from: %s",
659
 
                    unicode(self.client_address))
660
 
        session = (gnutls.connection
661
 
                   .ClientSession(self.request,
662
 
                                  gnutls.connection
663
 
                                  .X509Credentials()))
664
 
        
665
 
        line = self.request.makefile().readline()
666
 
        logger.debug(u"Protocol version: %r", line)
667
 
        try:
668
 
            if int(line.strip().split()[0]) > 1:
669
 
                raise RuntimeError
670
 
        except (ValueError, IndexError, RuntimeError), error:
671
 
            logger.error(u"Unknown protocol version: %s", error)
672
 
            return
673
 
        
674
 
        # Note: gnutls.connection.X509Credentials is really a generic
675
 
        # GnuTLS certificate credentials object so long as no X.509
676
 
        # keys are added to it.  Therefore, we can use it here despite
677
 
        # using OpenPGP certificates.
678
 
        
679
 
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
680
 
        #                     "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
681
 
        #                     "+DHE-DSS"))
682
 
        # Use a fallback default, since this MUST be set.
683
 
        priority = self.server.settings.get("priority", "NORMAL")
684
 
        (gnutls.library.functions
685
 
         .gnutls_priority_set_direct(session._c_object,
686
 
                                     priority, None))
687
 
        
688
 
        try:
689
 
            session.handshake()
690
 
        except gnutls.errors.GNUTLSError, error:
691
 
            logger.warning(u"Handshake failed: %s", error)
692
 
            # Do not run session.bye() here: the session is not
693
 
            # established.  Just abandon the request.
694
 
            return
695
 
        logger.debug(u"Handshake succeeded")
696
 
        try:
697
 
            fpr = fingerprint(peer_certificate(session))
698
 
        except (TypeError, gnutls.errors.GNUTLSError), error:
699
 
            logger.warning(u"Bad certificate: %s", error)
700
 
            session.bye()
701
 
            return
702
 
        logger.debug(u"Fingerprint: %s", fpr)
703
 
        
704
 
        for c in self.server.clients:
705
 
            if c.fingerprint == fpr:
706
 
                client = c
707
 
                break
708
 
        else:
709
 
            logger.warning(u"Client not found for fingerprint: %s",
710
 
                           fpr)
711
 
            session.bye()
712
 
            return
713
 
        # Have to check if client.still_valid(), since it is possible
714
 
        # that the client timed out while establishing the GnuTLS
715
 
        # session.
716
 
        if not client.still_valid():
717
 
            logger.warning(u"Client %(name)s is invalid",
718
 
                           vars(client))
719
 
            session.bye()
720
 
            return
721
 
        ## This won't work here, since we're in a fork.
722
 
        # client.checked_ok()
723
 
        sent_size = 0
724
 
        while sent_size < len(client.secret):
725
 
            sent = session.send(client.secret[sent_size:])
726
 
            logger.debug(u"Sent: %d, remaining: %d",
727
 
                         sent, len(client.secret)
728
 
                         - (sent_size + sent))
729
 
            sent_size += sent
730
 
        session.bye()
731
 
 
732
 
 
733
 
class IPv6_TCPServer(SocketServer.ForkingMixIn,
734
 
                     SocketServer.TCPServer, object):
735
 
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
 
1134
        with contextlib.closing(self.server.child_pipe) as child_pipe:
 
1135
            logger.info(u"TCP connection from: %s",
 
1136
                        unicode(self.client_address))
 
1137
            logger.debug(u"Pipe FD: %d",
 
1138
                         self.server.child_pipe.fileno())
 
1139
 
 
1140
            session = (gnutls.connection
 
1141
                       .ClientSession(self.request,
 
1142
                                      gnutls.connection
 
1143
                                      .X509Credentials()))
 
1144
 
 
1145
            # Note: gnutls.connection.X509Credentials is really a
 
1146
            # generic GnuTLS certificate credentials object so long as
 
1147
            # no X.509 keys are added to it.  Therefore, we can use it
 
1148
            # here despite using OpenPGP certificates.
 
1149
 
 
1150
            #priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
 
1151
            #                      u"+AES-256-CBC", u"+SHA1",
 
1152
            #                      u"+COMP-NULL", u"+CTYPE-OPENPGP",
 
1153
            #                      u"+DHE-DSS"))
 
1154
            # Use a fallback default, since this MUST be set.
 
1155
            priority = self.server.gnutls_priority
 
1156
            if priority is None:
 
1157
                priority = u"NORMAL"
 
1158
            (gnutls.library.functions
 
1159
             .gnutls_priority_set_direct(session._c_object,
 
1160
                                         priority, None))
 
1161
 
 
1162
            # Start communication using the Mandos protocol
 
1163
            # Get protocol number
 
1164
            line = self.request.makefile().readline()
 
1165
            logger.debug(u"Protocol version: %r", line)
 
1166
            try:
 
1167
                if int(line.strip().split()[0]) > 1:
 
1168
                    raise RuntimeError
 
1169
            except (ValueError, IndexError, RuntimeError), error:
 
1170
                logger.error(u"Unknown protocol version: %s", error)
 
1171
                return
 
1172
 
 
1173
            # Start GnuTLS connection
 
1174
            try:
 
1175
                session.handshake()
 
1176
            except gnutls.errors.GNUTLSError, error:
 
1177
                logger.warning(u"Handshake failed: %s", error)
 
1178
                # Do not run session.bye() here: the session is not
 
1179
                # established.  Just abandon the request.
 
1180
                return
 
1181
            logger.debug(u"Handshake succeeded")
 
1182
 
 
1183
            approval_required = False
 
1184
            try:
 
1185
                try:
 
1186
                    fpr = self.fingerprint(self.peer_certificate
 
1187
                                           (session))
 
1188
                except (TypeError, gnutls.errors.GNUTLSError), error:
 
1189
                    logger.warning(u"Bad certificate: %s", error)
 
1190
                    return
 
1191
                logger.debug(u"Fingerprint: %s", fpr)
 
1192
 
 
1193
                try:
 
1194
                    client = ProxyClient(child_pipe, fpr,
 
1195
                                         self.client_address)
 
1196
                except KeyError:
 
1197
                    return
 
1198
                
 
1199
                if client.approval_delay:
 
1200
                    delay = client.approval_delay
 
1201
                    client.approvals_pending += 1
 
1202
                    approval_required = True
 
1203
                
 
1204
                while True:
 
1205
                    if not client.enabled:
 
1206
                        logger.warning(u"Client %s is disabled",
 
1207
                                       client.name)
 
1208
                        if self.server.use_dbus:
 
1209
                            # Emit D-Bus signal
 
1210
                            client.Rejected("Disabled")                    
 
1211
                        return
 
1212
                    
 
1213
                    if client._approved or not client.approval_delay:
 
1214
                        #We are approved or approval is disabled
 
1215
                        break
 
1216
                    elif client._approved is None:
 
1217
                        logger.info(u"Client %s needs approval",
 
1218
                                    client.name)
 
1219
                        if self.server.use_dbus:
 
1220
                            # Emit D-Bus signal
 
1221
                            client.NeedApproval(
 
1222
                                client.approval_delay_milliseconds(),
 
1223
                                client.approved_by_default)
 
1224
                    else:
 
1225
                        logger.warning(u"Client %s was not approved",
 
1226
                                       client.name)
 
1227
                        if self.server.use_dbus:
 
1228
                            # Emit D-Bus signal
 
1229
                            client.Rejected("Denied")
 
1230
                        return
 
1231
                    
 
1232
                    #wait until timeout or approved
 
1233
                    #x = float(client._timedelta_to_milliseconds(delay))
 
1234
                    time = datetime.datetime.now()
 
1235
                    client.changedstate.acquire()
 
1236
                    client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
 
1237
                    client.changedstate.release()
 
1238
                    time2 = datetime.datetime.now()
 
1239
                    if (time2 - time) >= delay:
 
1240
                        if not client.approved_by_default:
 
1241
                            logger.warning("Client %s timed out while"
 
1242
                                           " waiting for approval",
 
1243
                                           client.name)
 
1244
                            if self.server.use_dbus:
 
1245
                                # Emit D-Bus signal
 
1246
                                client.Rejected("Timed out")
 
1247
                            return
 
1248
                        else:
 
1249
                            break
 
1250
                    else:
 
1251
                        delay -= time2 - time
 
1252
                
 
1253
                sent_size = 0
 
1254
                while sent_size < len(client.secret):
 
1255
                    try:
 
1256
                        sent = session.send(client.secret[sent_size:])
 
1257
                    except (gnutls.errors.GNUTLSError), error:
 
1258
                        logger.warning("gnutls send failed")
 
1259
                        return
 
1260
                    logger.debug(u"Sent: %d, remaining: %d",
 
1261
                                 sent, len(client.secret)
 
1262
                                 - (sent_size + sent))
 
1263
                    sent_size += sent
 
1264
 
 
1265
                logger.info(u"Sending secret to %s", client.name)
 
1266
                # bump the timeout as if seen
 
1267
                client.checked_ok()
 
1268
                if self.server.use_dbus:
 
1269
                    # Emit D-Bus signal
 
1270
                    client.GotSecret()
 
1271
            
 
1272
            finally:
 
1273
                if approval_required:
 
1274
                    client.approvals_pending -= 1
 
1275
                try:
 
1276
                    session.bye()
 
1277
                except (gnutls.errors.GNUTLSError), error:
 
1278
                    logger.warning("GnuTLS bye failed")
 
1279
    
 
1280
    @staticmethod
 
1281
    def peer_certificate(session):
 
1282
        "Return the peer's OpenPGP certificate as a bytestring"
 
1283
        # If not an OpenPGP certificate...
 
1284
        if (gnutls.library.functions
 
1285
            .gnutls_certificate_type_get(session._c_object)
 
1286
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
1287
            # ...do the normal thing
 
1288
            return session.peer_certificate
 
1289
        list_size = ctypes.c_uint(1)
 
1290
        cert_list = (gnutls.library.functions
 
1291
                     .gnutls_certificate_get_peers
 
1292
                     (session._c_object, ctypes.byref(list_size)))
 
1293
        if not bool(cert_list) and list_size.value != 0:
 
1294
            raise gnutls.errors.GNUTLSError(u"error getting peer"
 
1295
                                            u" certificate")
 
1296
        if list_size.value == 0:
 
1297
            return None
 
1298
        cert = cert_list[0]
 
1299
        return ctypes.string_at(cert.data, cert.size)
 
1300
    
 
1301
    @staticmethod
 
1302
    def fingerprint(openpgp):
 
1303
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
 
1304
        # New GnuTLS "datum" with the OpenPGP public key
 
1305
        datum = (gnutls.library.types
 
1306
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
1307
                                             ctypes.POINTER
 
1308
                                             (ctypes.c_ubyte)),
 
1309
                                 ctypes.c_uint(len(openpgp))))
 
1310
        # New empty GnuTLS certificate
 
1311
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
1312
        (gnutls.library.functions
 
1313
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
1314
        # Import the OpenPGP public key into the certificate
 
1315
        (gnutls.library.functions
 
1316
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
1317
                                    gnutls.library.constants
 
1318
                                    .GNUTLS_OPENPGP_FMT_RAW))
 
1319
        # Verify the self signature in the key
 
1320
        crtverify = ctypes.c_uint()
 
1321
        (gnutls.library.functions
 
1322
         .gnutls_openpgp_crt_verify_self(crt, 0,
 
1323
                                         ctypes.byref(crtverify)))
 
1324
        if crtverify.value != 0:
 
1325
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
1326
            raise (gnutls.errors.CertificateSecurityError
 
1327
                   (u"Verify failed"))
 
1328
        # New buffer for the fingerprint
 
1329
        buf = ctypes.create_string_buffer(20)
 
1330
        buf_len = ctypes.c_size_t()
 
1331
        # Get the fingerprint from the certificate into the buffer
 
1332
        (gnutls.library.functions
 
1333
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
1334
                                             ctypes.byref(buf_len)))
 
1335
        # Deinit the certificate
 
1336
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
1337
        # Convert the buffer to a Python bytestring
 
1338
        fpr = ctypes.string_at(buf, buf_len.value)
 
1339
        # Convert the bytestring to hexadecimal notation
 
1340
        hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
1341
        return hex_fpr
 
1342
 
 
1343
 
 
1344
class MultiprocessingMixIn(object):
 
1345
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
 
1346
    def sub_process_main(self, request, address):
 
1347
        try:
 
1348
            self.finish_request(request, address)
 
1349
        except:
 
1350
            self.handle_error(request, address)
 
1351
        self.close_request(request)
 
1352
            
 
1353
    def process_request(self, request, address):
 
1354
        """Start a new process to process the request."""
 
1355
        multiprocessing.Process(target = self.sub_process_main,
 
1356
                                args = (request, address)).start()
 
1357
 
 
1358
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
 
1359
    """ adds a pipe to the MixIn """
 
1360
    def process_request(self, request, client_address):
 
1361
        """Overrides and wraps the original process_request().
 
1362
        
 
1363
        This function creates a new pipe in self.pipe
 
1364
        """
 
1365
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
 
1366
 
 
1367
        super(MultiprocessingMixInWithPipe,
 
1368
              self).process_request(request, client_address)
 
1369
        self.child_pipe.close()
 
1370
        self.add_pipe(parent_pipe)
 
1371
 
 
1372
    def add_pipe(self, parent_pipe):
 
1373
        """Dummy function; override as necessary"""
 
1374
        pass
 
1375
 
 
1376
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
 
1377
                     socketserver.TCPServer, object):
 
1378
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
 
1379
    
736
1380
    Attributes:
737
 
        settings:       Server settings
738
 
        clients:        Set() of Client objects
739
1381
        enabled:        Boolean; whether this server is activated yet
 
1382
        interface:      None or a network interface name (string)
 
1383
        use_ipv6:       Boolean; to use IPv6 or not
740
1384
    """
741
 
    address_family = socket.AF_INET6
742
 
    def __init__(self, *args, **kwargs):
743
 
        if "settings" in kwargs:
744
 
            self.settings = kwargs["settings"]
745
 
            del kwargs["settings"]
746
 
        if "clients" in kwargs:
747
 
            self.clients = kwargs["clients"]
748
 
            del kwargs["clients"]
749
 
        self.enabled = False
750
 
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
 
1385
    def __init__(self, server_address, RequestHandlerClass,
 
1386
                 interface=None, use_ipv6=True):
 
1387
        self.interface = interface
 
1388
        if use_ipv6:
 
1389
            self.address_family = socket.AF_INET6
 
1390
        socketserver.TCPServer.__init__(self, server_address,
 
1391
                                        RequestHandlerClass)
751
1392
    def server_bind(self):
752
1393
        """This overrides the normal server_bind() function
753
1394
        to bind to an interface if one was specified, and also NOT to
754
1395
        bind to an address or port if they were not specified."""
755
 
        if self.settings["interface"]:
756
 
            # 25 is from /usr/include/asm-i486/socket.h
757
 
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
758
 
            try:
759
 
                self.socket.setsockopt(socket.SOL_SOCKET,
760
 
                                       SO_BINDTODEVICE,
761
 
                                       self.settings["interface"])
762
 
            except socket.error, error:
763
 
                if error[0] == errno.EPERM:
764
 
                    logger.error(u"No permission to"
765
 
                                 u" bind to interface %s",
766
 
                                 self.settings["interface"])
767
 
                else:
768
 
                    raise
 
1396
        if self.interface is not None:
 
1397
            if SO_BINDTODEVICE is None:
 
1398
                logger.error(u"SO_BINDTODEVICE does not exist;"
 
1399
                             u" cannot bind to interface %s",
 
1400
                             self.interface)
 
1401
            else:
 
1402
                try:
 
1403
                    self.socket.setsockopt(socket.SOL_SOCKET,
 
1404
                                           SO_BINDTODEVICE,
 
1405
                                           str(self.interface
 
1406
                                               + u'\0'))
 
1407
                except socket.error, error:
 
1408
                    if error[0] == errno.EPERM:
 
1409
                        logger.error(u"No permission to"
 
1410
                                     u" bind to interface %s",
 
1411
                                     self.interface)
 
1412
                    elif error[0] == errno.ENOPROTOOPT:
 
1413
                        logger.error(u"SO_BINDTODEVICE not available;"
 
1414
                                     u" cannot bind to interface %s",
 
1415
                                     self.interface)
 
1416
                    else:
 
1417
                        raise
769
1418
        # Only bind(2) the socket if we really need to.
770
1419
        if self.server_address[0] or self.server_address[1]:
771
1420
            if not self.server_address[0]:
772
 
                in6addr_any = "::"
773
 
                self.server_address = (in6addr_any,
 
1421
                if self.address_family == socket.AF_INET6:
 
1422
                    any_address = u"::" # in6addr_any
 
1423
                else:
 
1424
                    any_address = socket.INADDR_ANY
 
1425
                self.server_address = (any_address,
774
1426
                                       self.server_address[1])
775
1427
            elif not self.server_address[1]:
776
1428
                self.server_address = (self.server_address[0],
777
1429
                                       0)
778
 
#                 if self.settings["interface"]:
 
1430
#                 if self.interface:
779
1431
#                     self.server_address = (self.server_address[0],
780
1432
#                                            0, # port
781
1433
#                                            0, # flowinfo
782
1434
#                                            if_nametoindex
783
 
#                                            (self.settings
784
 
#                                             ["interface"]))
785
 
            return super(IPv6_TCPServer, self).server_bind()
 
1435
#                                            (self.interface))
 
1436
            return socketserver.TCPServer.server_bind(self)
 
1437
 
 
1438
 
 
1439
class MandosServer(IPv6_TCPServer):
 
1440
    """Mandos server.
 
1441
    
 
1442
    Attributes:
 
1443
        clients:        set of Client objects
 
1444
        gnutls_priority GnuTLS priority string
 
1445
        use_dbus:       Boolean; to emit D-Bus signals or not
 
1446
    
 
1447
    Assumes a gobject.MainLoop event loop.
 
1448
    """
 
1449
    def __init__(self, server_address, RequestHandlerClass,
 
1450
                 interface=None, use_ipv6=True, clients=None,
 
1451
                 gnutls_priority=None, use_dbus=True):
 
1452
        self.enabled = False
 
1453
        self.clients = clients
 
1454
        if self.clients is None:
 
1455
            self.clients = set()
 
1456
        self.use_dbus = use_dbus
 
1457
        self.gnutls_priority = gnutls_priority
 
1458
        IPv6_TCPServer.__init__(self, server_address,
 
1459
                                RequestHandlerClass,
 
1460
                                interface = interface,
 
1461
                                use_ipv6 = use_ipv6)
786
1462
    def server_activate(self):
787
1463
        if self.enabled:
788
 
            return super(IPv6_TCPServer, self).server_activate()
 
1464
            return socketserver.TCPServer.server_activate(self)
789
1465
    def enable(self):
790
1466
        self.enabled = True
 
1467
    def add_pipe(self, parent_pipe):
 
1468
        # Call "handle_ipc" for both data and EOF events
 
1469
        gobject.io_add_watch(parent_pipe.fileno(),
 
1470
                             gobject.IO_IN | gobject.IO_HUP,
 
1471
                             functools.partial(self.handle_ipc,
 
1472
                                               parent_pipe = parent_pipe))
 
1473
        
 
1474
    def handle_ipc(self, source, condition, parent_pipe=None,
 
1475
                   client_object=None):
 
1476
        condition_names = {
 
1477
            gobject.IO_IN: u"IN",   # There is data to read.
 
1478
            gobject.IO_OUT: u"OUT", # Data can be written (without
 
1479
                                    # blocking).
 
1480
            gobject.IO_PRI: u"PRI", # There is urgent data to read.
 
1481
            gobject.IO_ERR: u"ERR", # Error condition.
 
1482
            gobject.IO_HUP: u"HUP"  # Hung up (the connection has been
 
1483
                                    # broken, usually for pipes and
 
1484
                                    # sockets).
 
1485
            }
 
1486
        conditions_string = ' | '.join(name
 
1487
                                       for cond, name in
 
1488
                                       condition_names.iteritems()
 
1489
                                       if cond & condition)
 
1490
        logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
 
1491
                     conditions_string)
 
1492
 
 
1493
        # error or the other end of multiprocessing.Pipe has closed
 
1494
        if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
 
1495
            return False
 
1496
        
 
1497
        # Read a request from the child
 
1498
        request = parent_pipe.recv()
 
1499
        logger.debug(u"IPC request: %s", repr(request))
 
1500
        command = request[0]
 
1501
        
 
1502
        if command == 'init':
 
1503
            fpr = request[1]
 
1504
            address = request[2]
 
1505
            
 
1506
            for c in self.clients:
 
1507
                if c.fingerprint == fpr:
 
1508
                    client = c
 
1509
                    break
 
1510
            else:
 
1511
                logger.warning(u"Client not found for fingerprint: %s, ad"
 
1512
                               u"dress: %s", fpr, address)
 
1513
                if self.use_dbus:
 
1514
                    # Emit D-Bus signal
 
1515
                    mandos_dbus_service.ClientNotFound(fpr, address)
 
1516
                parent_pipe.send(False)
 
1517
                return False
 
1518
            
 
1519
            gobject.io_add_watch(parent_pipe.fileno(),
 
1520
                                 gobject.IO_IN | gobject.IO_HUP,
 
1521
                                 functools.partial(self.handle_ipc,
 
1522
                                                   parent_pipe = parent_pipe,
 
1523
                                                   client_object = client))
 
1524
            parent_pipe.send(True)
 
1525
            # remove the old hook in favor of the new above hook on same fileno
 
1526
            return False
 
1527
        if command == 'funcall':
 
1528
            funcname = request[1]
 
1529
            args = request[2]
 
1530
            kwargs = request[3]
 
1531
            
 
1532
            parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
 
1533
 
 
1534
        if command == 'getattr':
 
1535
            attrname = request[1]
 
1536
            if callable(client_object.__getattribute__(attrname)):
 
1537
                parent_pipe.send(('function',))
 
1538
            else:
 
1539
                parent_pipe.send(('data', client_object.__getattribute__(attrname)))
 
1540
        
 
1541
        if command == 'setattr':
 
1542
            attrname = request[1]
 
1543
            value = request[2]
 
1544
            setattr(client_object, attrname, value)
 
1545
 
 
1546
        return True
791
1547
 
792
1548
 
793
1549
def string_to_delta(interval):
794
1550
    """Parse a string and return a datetime.timedelta
795
1551
    
796
 
    >>> string_to_delta('7d')
 
1552
    >>> string_to_delta(u'7d')
797
1553
    datetime.timedelta(7)
798
 
    >>> string_to_delta('60s')
 
1554
    >>> string_to_delta(u'60s')
799
1555
    datetime.timedelta(0, 60)
800
 
    >>> string_to_delta('60m')
 
1556
    >>> string_to_delta(u'60m')
801
1557
    datetime.timedelta(0, 3600)
802
 
    >>> string_to_delta('24h')
 
1558
    >>> string_to_delta(u'24h')
803
1559
    datetime.timedelta(1)
804
1560
    >>> string_to_delta(u'1w')
805
1561
    datetime.timedelta(7)
806
 
    >>> string_to_delta('5m 30s')
 
1562
    >>> string_to_delta(u'5m 30s')
807
1563
    datetime.timedelta(0, 330)
808
1564
    """
809
1565
    timevalue = datetime.timedelta(0)
822
1578
            elif suffix == u"w":
823
1579
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
824
1580
            else:
825
 
                raise ValueError
826
 
        except (ValueError, IndexError):
827
 
            raise ValueError
 
1581
                raise ValueError(u"Unknown suffix %r" % suffix)
 
1582
        except (ValueError, IndexError), e:
 
1583
            raise ValueError(e.message)
828
1584
        timevalue += delta
829
1585
    return timevalue
830
1586
 
831
1587
 
832
 
def server_state_changed(state):
833
 
    """Derived from the Avahi example code"""
834
 
    if state == avahi.SERVER_COLLISION:
835
 
        logger.error(u"Zeroconf server name collision")
836
 
        service.remove()
837
 
    elif state == avahi.SERVER_RUNNING:
838
 
        service.add()
839
 
 
840
 
 
841
 
def entry_group_state_changed(state, error):
842
 
    """Derived from the Avahi example code"""
843
 
    logger.debug(u"Avahi state change: %i", state)
844
 
    
845
 
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
846
 
        logger.debug(u"Zeroconf service established.")
847
 
    elif state == avahi.ENTRY_GROUP_COLLISION:
848
 
        logger.warning(u"Zeroconf service name collision.")
849
 
        service.rename()
850
 
    elif state == avahi.ENTRY_GROUP_FAILURE:
851
 
        logger.critical(u"Avahi: Error in group state changed %s",
852
 
                        unicode(error))
853
 
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
854
 
 
855
1588
def if_nametoindex(interface):
856
 
    """Call the C function if_nametoindex(), or equivalent"""
 
1589
    """Call the C function if_nametoindex(), or equivalent
 
1590
    
 
1591
    Note: This function cannot accept a unicode string."""
857
1592
    global if_nametoindex
858
1593
    try:
859
1594
        if_nametoindex = (ctypes.cdll.LoadLibrary
860
 
                          (ctypes.util.find_library("c"))
 
1595
                          (ctypes.util.find_library(u"c"))
861
1596
                          .if_nametoindex)
862
1597
    except (OSError, AttributeError):
863
 
        if "struct" not in sys.modules:
864
 
            import struct
865
 
        if "fcntl" not in sys.modules:
866
 
            import fcntl
 
1598
        logger.warning(u"Doing if_nametoindex the hard way")
867
1599
        def if_nametoindex(interface):
868
1600
            "Get an interface index the hard way, i.e. using fcntl()"
869
1601
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
870
 
            with closing(socket.socket()) as s:
 
1602
            with contextlib.closing(socket.socket()) as s:
871
1603
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
872
 
                                    struct.pack("16s16x", interface))
873
 
            interface_index = struct.unpack("I", ifreq[16:20])[0]
 
1604
                                    struct.pack(str(u"16s16x"),
 
1605
                                                interface))
 
1606
            interface_index = struct.unpack(str(u"I"),
 
1607
                                            ifreq[16:20])[0]
874
1608
            return interface_index
875
1609
    return if_nametoindex(interface)
876
1610
 
877
1611
 
878
1612
def daemon(nochdir = False, noclose = False):
879
1613
    """See daemon(3).  Standard BSD Unix function.
 
1614
    
880
1615
    This should really exist as os.daemon, but it doesn't (yet)."""
881
1616
    if os.fork():
882
1617
        sys.exit()
883
1618
    os.setsid()
884
1619
    if not nochdir:
885
 
        os.chdir("/")
 
1620
        os.chdir(u"/")
886
1621
    if os.fork():
887
1622
        sys.exit()
888
1623
    if not noclose:
890
1625
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
891
1626
        if not stat.S_ISCHR(os.fstat(null).st_mode):
892
1627
            raise OSError(errno.ENODEV,
893
 
                          "/dev/null not a character device")
 
1628
                          u"%s not a character device"
 
1629
                          % os.path.devnull)
894
1630
        os.dup2(null, sys.stdin.fileno())
895
1631
        os.dup2(null, sys.stdout.fileno())
896
1632
        os.dup2(null, sys.stderr.fileno())
899
1635
 
900
1636
 
901
1637
def main():
 
1638
    
 
1639
    ##################################################################
 
1640
    # Parsing of options, both command line and config file
 
1641
    
902
1642
    parser = optparse.OptionParser(version = "%%prog %s" % version)
903
 
    parser.add_option("-i", "--interface", type="string",
904
 
                      metavar="IF", help="Bind to interface IF")
905
 
    parser.add_option("-a", "--address", type="string",
906
 
                      help="Address to listen for requests on")
907
 
    parser.add_option("-p", "--port", type="int",
908
 
                      help="Port number to receive requests on")
909
 
    parser.add_option("--check", action="store_true",
910
 
                      help="Run self-test")
911
 
    parser.add_option("--debug", action="store_true",
912
 
                      help="Debug mode; run in foreground and log to"
913
 
                      " terminal")
914
 
    parser.add_option("--priority", type="string", help="GnuTLS"
915
 
                      " priority string (see GnuTLS documentation)")
916
 
    parser.add_option("--servicename", type="string", metavar="NAME",
917
 
                      help="Zeroconf service name")
918
 
    parser.add_option("--configdir", type="string",
919
 
                      default="/etc/mandos", metavar="DIR",
920
 
                      help="Directory to search for configuration"
921
 
                      " files")
922
 
    parser.add_option("--no-dbus", action="store_false",
923
 
                      dest="use_dbus",
924
 
                      help="Do not provide D-Bus system bus"
925
 
                      " interface")
 
1643
    parser.add_option("-i", u"--interface", type=u"string",
 
1644
                      metavar="IF", help=u"Bind to interface IF")
 
1645
    parser.add_option("-a", u"--address", type=u"string",
 
1646
                      help=u"Address to listen for requests on")
 
1647
    parser.add_option("-p", u"--port", type=u"int",
 
1648
                      help=u"Port number to receive requests on")
 
1649
    parser.add_option("--check", action=u"store_true",
 
1650
                      help=u"Run self-test")
 
1651
    parser.add_option("--debug", action=u"store_true",
 
1652
                      help=u"Debug mode; run in foreground and log to"
 
1653
                      u" terminal")
 
1654
    parser.add_option("--debuglevel", type=u"string", metavar="Level",
 
1655
                      help=u"Debug level for stdout output")
 
1656
    parser.add_option("--priority", type=u"string", help=u"GnuTLS"
 
1657
                      u" priority string (see GnuTLS documentation)")
 
1658
    parser.add_option("--servicename", type=u"string",
 
1659
                      metavar=u"NAME", help=u"Zeroconf service name")
 
1660
    parser.add_option("--configdir", type=u"string",
 
1661
                      default=u"/etc/mandos", metavar=u"DIR",
 
1662
                      help=u"Directory to search for configuration"
 
1663
                      u" files")
 
1664
    parser.add_option("--no-dbus", action=u"store_false",
 
1665
                      dest=u"use_dbus", help=u"Do not provide D-Bus"
 
1666
                      u" system bus interface")
 
1667
    parser.add_option("--no-ipv6", action=u"store_false",
 
1668
                      dest=u"use_ipv6", help=u"Do not use IPv6")
926
1669
    options = parser.parse_args()[0]
927
1670
    
928
1671
    if options.check:
931
1674
        sys.exit()
932
1675
    
933
1676
    # Default values for config file for server-global settings
934
 
    server_defaults = { "interface": "",
935
 
                        "address": "",
936
 
                        "port": "",
937
 
                        "debug": "False",
938
 
                        "priority":
939
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
940
 
                        "servicename": "Mandos",
941
 
                        "use_dbus": "True",
 
1677
    server_defaults = { u"interface": u"",
 
1678
                        u"address": u"",
 
1679
                        u"port": u"",
 
1680
                        u"debug": u"False",
 
1681
                        u"priority":
 
1682
                        u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
 
1683
                        u"servicename": u"Mandos",
 
1684
                        u"use_dbus": u"True",
 
1685
                        u"use_ipv6": u"True",
 
1686
                        u"debuglevel": u"",
942
1687
                        }
943
1688
    
944
1689
    # Parse config file for server-global settings
945
 
    server_config = ConfigParser.SafeConfigParser(server_defaults)
 
1690
    server_config = configparser.SafeConfigParser(server_defaults)
946
1691
    del server_defaults
947
 
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
1692
    server_config.read(os.path.join(options.configdir,
 
1693
                                    u"mandos.conf"))
948
1694
    # Convert the SafeConfigParser object to a dict
949
1695
    server_settings = server_config.defaults()
950
1696
    # Use the appropriate methods on the non-string config options
951
 
    server_settings["debug"] = server_config.getboolean("DEFAULT",
952
 
                                                        "debug")
953
 
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
954
 
                                                           "use_dbus")
 
1697
    for option in (u"debug", u"use_dbus", u"use_ipv6"):
 
1698
        server_settings[option] = server_config.getboolean(u"DEFAULT",
 
1699
                                                           option)
955
1700
    if server_settings["port"]:
956
 
        server_settings["port"] = server_config.getint("DEFAULT",
957
 
                                                       "port")
 
1701
        server_settings["port"] = server_config.getint(u"DEFAULT",
 
1702
                                                       u"port")
958
1703
    del server_config
959
1704
    
960
1705
    # Override the settings from the config file with command line
961
1706
    # options, if set.
962
 
    for option in ("interface", "address", "port", "debug",
963
 
                   "priority", "servicename", "configdir",
964
 
                   "use_dbus"):
 
1707
    for option in (u"interface", u"address", u"port", u"debug",
 
1708
                   u"priority", u"servicename", u"configdir",
 
1709
                   u"use_dbus", u"use_ipv6", u"debuglevel"):
965
1710
        value = getattr(options, option)
966
1711
        if value is not None:
967
1712
            server_settings[option] = value
968
1713
    del options
 
1714
    # Force all strings to be unicode
 
1715
    for option in server_settings.keys():
 
1716
        if type(server_settings[option]) is str:
 
1717
            server_settings[option] = unicode(server_settings[option])
969
1718
    # Now we have our good server settings in "server_settings"
970
1719
    
 
1720
    ##################################################################
 
1721
    
971
1722
    # For convenience
972
 
    debug = server_settings["debug"]
973
 
    use_dbus = server_settings["use_dbus"]
974
 
    
975
 
    if not debug:
976
 
        syslogger.setLevel(logging.WARNING)
977
 
        console.setLevel(logging.WARNING)
978
 
    
979
 
    if server_settings["servicename"] != "Mandos":
 
1723
    debug = server_settings[u"debug"]
 
1724
    debuglevel = server_settings[u"debuglevel"]
 
1725
    use_dbus = server_settings[u"use_dbus"]
 
1726
    use_ipv6 = server_settings[u"use_ipv6"]
 
1727
 
 
1728
    if server_settings[u"servicename"] != u"Mandos":
980
1729
        syslogger.setFormatter(logging.Formatter
981
 
                               ('Mandos (%s): %%(levelname)s:'
982
 
                                ' %%(message)s'
983
 
                                % server_settings["servicename"]))
 
1730
                               (u'Mandos (%s) [%%(process)d]:'
 
1731
                                u' %%(levelname)s: %%(message)s'
 
1732
                                % server_settings[u"servicename"]))
984
1733
    
985
1734
    # Parse config file with clients
986
 
    client_defaults = { "timeout": "1h",
987
 
                        "interval": "5m",
988
 
                        "checker": "fping -q -- %%(host)s",
989
 
                        "host": "",
 
1735
    client_defaults = { u"timeout": u"1h",
 
1736
                        u"interval": u"5m",
 
1737
                        u"checker": u"fping -q -- %%(host)s",
 
1738
                        u"host": u"",
 
1739
                        u"approval_delay": u"0s",
 
1740
                        u"approval_duration": u"1s",
990
1741
                        }
991
 
    client_config = ConfigParser.SafeConfigParser(client_defaults)
992
 
    client_config.read(os.path.join(server_settings["configdir"],
993
 
                                    "clients.conf"))
994
 
    
995
 
    clients = Set()
996
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
997
 
                                 server_settings["port"]),
998
 
                                TCP_handler,
999
 
                                settings=server_settings,
1000
 
                                clients=clients)
1001
 
    pidfilename = "/var/run/mandos.pid"
 
1742
    client_config = configparser.SafeConfigParser(client_defaults)
 
1743
    client_config.read(os.path.join(server_settings[u"configdir"],
 
1744
                                    u"clients.conf"))
 
1745
    
 
1746
    global mandos_dbus_service
 
1747
    mandos_dbus_service = None
 
1748
    
 
1749
    tcp_server = MandosServer((server_settings[u"address"],
 
1750
                               server_settings[u"port"]),
 
1751
                              ClientHandler,
 
1752
                              interface=(server_settings[u"interface"]
 
1753
                                         or None),
 
1754
                              use_ipv6=use_ipv6,
 
1755
                              gnutls_priority=
 
1756
                              server_settings[u"priority"],
 
1757
                              use_dbus=use_dbus)
 
1758
    pidfilename = u"/var/run/mandos.pid"
1002
1759
    try:
1003
 
        pidfile = open(pidfilename, "w")
 
1760
        pidfile = open(pidfilename, u"w")
1004
1761
    except IOError:
1005
 
        logger.error("Could not open file %r", pidfilename)
 
1762
        logger.error(u"Could not open file %r", pidfilename)
1006
1763
    
1007
1764
    try:
1008
 
        uid = pwd.getpwnam("_mandos").pw_uid
1009
 
        gid = pwd.getpwnam("_mandos").pw_gid
 
1765
        uid = pwd.getpwnam(u"_mandos").pw_uid
 
1766
        gid = pwd.getpwnam(u"_mandos").pw_gid
1010
1767
    except KeyError:
1011
1768
        try:
1012
 
            uid = pwd.getpwnam("mandos").pw_uid
1013
 
            gid = pwd.getpwnam("mandos").pw_gid
 
1769
            uid = pwd.getpwnam(u"mandos").pw_uid
 
1770
            gid = pwd.getpwnam(u"mandos").pw_gid
1014
1771
        except KeyError:
1015
1772
            try:
1016
 
                uid = pwd.getpwnam("nobody").pw_uid
1017
 
                gid = pwd.getpwnam("nogroup").pw_gid
 
1773
                uid = pwd.getpwnam(u"nobody").pw_uid
 
1774
                gid = pwd.getpwnam(u"nobody").pw_gid
1018
1775
            except KeyError:
1019
1776
                uid = 65534
1020
1777
                gid = 65534
1025
1782
        if error[0] != errno.EPERM:
1026
1783
            raise error
1027
1784
    
1028
 
    # Enable all possible GnuTLS debugging
 
1785
    if not debug and not debuglevel:
 
1786
        syslogger.setLevel(logging.WARNING)
 
1787
        console.setLevel(logging.WARNING)
 
1788
    if debuglevel:
 
1789
        level = getattr(logging, debuglevel.upper())
 
1790
        syslogger.setLevel(level)
 
1791
        console.setLevel(level)
 
1792
 
1029
1793
    if debug:
 
1794
        # Enable all possible GnuTLS debugging
 
1795
        
1030
1796
        # "Use a log level over 10 to enable all debugging options."
1031
1797
        # - GnuTLS manual
1032
1798
        gnutls.library.functions.gnutls_global_set_log_level(11)
1033
1799
        
1034
1800
        @gnutls.library.types.gnutls_log_func
1035
1801
        def debug_gnutls(level, string):
1036
 
            logger.debug("GnuTLS: %s", string[:-1])
 
1802
            logger.debug(u"GnuTLS: %s", string[:-1])
1037
1803
        
1038
1804
        (gnutls.library.functions
1039
1805
         .gnutls_global_set_log_function(debug_gnutls))
 
1806
        
 
1807
        # Redirect stdin so all checkers get /dev/null
 
1808
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
1809
        os.dup2(null, sys.stdin.fileno())
 
1810
        if null > 2:
 
1811
            os.close(null)
 
1812
    else:
 
1813
        # No console logging
 
1814
        logger.removeHandler(console)
1040
1815
    
1041
 
    global service
1042
 
    service = AvahiService(name = server_settings["servicename"],
1043
 
                           servicetype = "_mandos._tcp", )
1044
 
    if server_settings["interface"]:
1045
 
        service.interface = (if_nametoindex
1046
 
                             (server_settings["interface"]))
1047
1816
    
1048
1817
    global main_loop
1049
 
    global bus
1050
 
    global server
1051
1818
    # From the Avahi example code
1052
1819
    DBusGMainLoop(set_as_default=True )
1053
1820
    main_loop = gobject.MainLoop()
1054
1821
    bus = dbus.SystemBus()
1055
 
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1056
 
                                           avahi.DBUS_PATH_SERVER),
1057
 
                            avahi.DBUS_INTERFACE_SERVER)
1058
1822
    # End of Avahi example code
1059
1823
    if use_dbus:
1060
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1061
 
    
1062
 
    clients.update(Set(Client(name = section,
1063
 
                              config
1064
 
                              = dict(client_config.items(section)),
1065
 
                              use_dbus = use_dbus)
1066
 
                       for section in client_config.sections()))
1067
 
    if not clients:
1068
 
        logger.warning(u"No clients defined")
1069
 
    
1070
 
    if debug:
1071
 
        # Redirect stdin so all checkers get /dev/null
1072
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1073
 
        os.dup2(null, sys.stdin.fileno())
1074
 
        if null > 2:
1075
 
            os.close(null)
1076
 
    else:
1077
 
        # No console logging
1078
 
        logger.removeHandler(console)
 
1824
        try:
 
1825
            bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
 
1826
                                            bus, do_not_queue=True)
 
1827
        except dbus.exceptions.NameExistsException, e:
 
1828
            logger.error(unicode(e) + u", disabling D-Bus")
 
1829
            use_dbus = False
 
1830
            server_settings[u"use_dbus"] = False
 
1831
            tcp_server.use_dbus = False
 
1832
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
 
1833
    service = AvahiService(name = server_settings[u"servicename"],
 
1834
                           servicetype = u"_mandos._tcp",
 
1835
                           protocol = protocol, bus = bus)
 
1836
    if server_settings["interface"]:
 
1837
        service.interface = (if_nametoindex
 
1838
                             (str(server_settings[u"interface"])))
 
1839
 
 
1840
    if not debug:
1079
1841
        # Close all input and output, do double fork, etc.
1080
1842
        daemon()
1081
 
    
 
1843
        
 
1844
    global multiprocessing_manager
 
1845
    multiprocessing_manager = multiprocessing.Manager()
 
1846
    
 
1847
    client_class = Client
 
1848
    if use_dbus:
 
1849
        client_class = functools.partial(ClientDBus, bus = bus)
 
1850
    def client_config_items(config, section):
 
1851
        special_settings = {
 
1852
            "approved_by_default":
 
1853
                lambda: config.getboolean(section,
 
1854
                                          "approved_by_default"),
 
1855
            }
 
1856
        for name, value in config.items(section):
 
1857
            try:
 
1858
                yield (name, special_settings[name]())
 
1859
            except KeyError:
 
1860
                yield (name, value)
 
1861
    
 
1862
    tcp_server.clients.update(set(
 
1863
            client_class(name = section,
 
1864
                         config= dict(client_config_items(
 
1865
                        client_config, section)))
 
1866
            for section in client_config.sections()))
 
1867
    if not tcp_server.clients:
 
1868
        logger.warning(u"No clients defined")
 
1869
        
1082
1870
    try:
1083
 
        pid = os.getpid()
1084
 
        pidfile.write(str(pid) + "\n")
1085
 
        pidfile.close()
 
1871
        with pidfile:
 
1872
            pid = os.getpid()
 
1873
            pidfile.write(str(pid) + "\n")
1086
1874
        del pidfile
1087
1875
    except IOError:
1088
1876
        logger.error(u"Could not write to file %r with PID %d",
1092
1880
        pass
1093
1881
    del pidfilename
1094
1882
    
1095
 
    def cleanup():
1096
 
        "Cleanup function; run on exit"
1097
 
        global group
1098
 
        # From the Avahi example code
1099
 
        if not group is None:
1100
 
            group.Free()
1101
 
            group = None
1102
 
        # End of Avahi example code
1103
 
        
1104
 
        while clients:
1105
 
            client = clients.pop()
1106
 
            client.disable_hook = None
1107
 
            client.disable()
1108
 
    
1109
 
    atexit.register(cleanup)
1110
 
    
1111
1883
    if not debug:
1112
1884
        signal.signal(signal.SIGINT, signal.SIG_IGN)
1113
1885
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1114
1886
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1115
1887
    
1116
1888
    if use_dbus:
1117
 
        class MandosServer(dbus.service.Object):
 
1889
        class MandosDBusService(dbus.service.Object):
1118
1890
            """A D-Bus proxy object"""
1119
1891
            def __init__(self):
1120
 
                dbus.service.Object.__init__(self, bus, "/")
 
1892
                dbus.service.Object.__init__(self, bus, u"/")
1121
1893
            _interface = u"se.bsnet.fukt.Mandos"
1122
1894
            
1123
 
            @dbus.service.signal(_interface, signature="oa{sv}")
1124
 
            def ClientAdded(self, objpath, properties):
1125
 
                "D-Bus signal"
1126
 
                pass
1127
 
            
1128
 
            @dbus.service.signal(_interface, signature="os")
 
1895
            @dbus.service.signal(_interface, signature=u"o")
 
1896
            def ClientAdded(self, objpath):
 
1897
                "D-Bus signal"
 
1898
                pass
 
1899
            
 
1900
            @dbus.service.signal(_interface, signature=u"ss")
 
1901
            def ClientNotFound(self, fingerprint, address):
 
1902
                "D-Bus signal"
 
1903
                pass
 
1904
            
 
1905
            @dbus.service.signal(_interface, signature=u"os")
1129
1906
            def ClientRemoved(self, objpath, name):
1130
1907
                "D-Bus signal"
1131
1908
                pass
1132
1909
            
1133
 
            @dbus.service.method(_interface, out_signature="ao")
 
1910
            @dbus.service.method(_interface, out_signature=u"ao")
1134
1911
            def GetAllClients(self):
1135
1912
                "D-Bus method"
1136
 
                return dbus.Array(c.dbus_object_path for c in clients)
 
1913
                return dbus.Array(c.dbus_object_path
 
1914
                                  for c in tcp_server.clients)
1137
1915
            
1138
 
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
 
1916
            @dbus.service.method(_interface,
 
1917
                                 out_signature=u"a{oa{sv}}")
1139
1918
            def GetAllClientsWithProperties(self):
1140
1919
                "D-Bus method"
1141
1920
                return dbus.Dictionary(
1142
 
                    ((c.dbus_object_path, c.GetAllProperties())
1143
 
                     for c in clients),
1144
 
                    signature="oa{sv}")
 
1921
                    ((c.dbus_object_path, c.GetAll(u""))
 
1922
                     for c in tcp_server.clients),
 
1923
                    signature=u"oa{sv}")
1145
1924
            
1146
 
            @dbus.service.method(_interface, in_signature="o")
 
1925
            @dbus.service.method(_interface, in_signature=u"o")
1147
1926
            def RemoveClient(self, object_path):
1148
1927
                "D-Bus method"
1149
 
                for c in clients:
 
1928
                for c in tcp_server.clients:
1150
1929
                    if c.dbus_object_path == object_path:
1151
 
                        clients.remove(c)
 
1930
                        tcp_server.clients.remove(c)
 
1931
                        c.remove_from_connection()
1152
1932
                        # Don't signal anything except ClientRemoved
1153
 
                        c.use_dbus = False
1154
 
                        c.disable()
 
1933
                        c.disable(quiet=True)
1155
1934
                        # Emit D-Bus signal
1156
1935
                        self.ClientRemoved(object_path, c.name)
1157
1936
                        return
1158
 
                raise KeyError
 
1937
                raise KeyError(object_path)
1159
1938
            
1160
1939
            del _interface
1161
1940
        
1162
 
        mandos_server = MandosServer()
1163
 
    
1164
 
    for client in clients:
 
1941
        mandos_dbus_service = MandosDBusService()
 
1942
    
 
1943
    def cleanup():
 
1944
        "Cleanup function; run on exit"
 
1945
        service.cleanup()
 
1946
        
 
1947
        while tcp_server.clients:
 
1948
            client = tcp_server.clients.pop()
 
1949
            if use_dbus:
 
1950
                client.remove_from_connection()
 
1951
            client.disable_hook = None
 
1952
            # Don't signal anything except ClientRemoved
 
1953
            client.disable(quiet=True)
 
1954
            if use_dbus:
 
1955
                # Emit D-Bus signal
 
1956
                mandos_dbus_service.ClientRemoved(client.dbus_object_path,
 
1957
                                                  client.name)
 
1958
    
 
1959
    atexit.register(cleanup)
 
1960
    
 
1961
    for client in tcp_server.clients:
1165
1962
        if use_dbus:
1166
1963
            # Emit D-Bus signal
1167
 
            mandos_server.ClientAdded(client.dbus_object_path,
1168
 
                                      client.GetAllProperties())
 
1964
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
1169
1965
        client.enable()
1170
1966
    
1171
1967
    tcp_server.enable()
1173
1969
    
1174
1970
    # Find out what port we got
1175
1971
    service.port = tcp_server.socket.getsockname()[1]
1176
 
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1177
 
                u" scope_id %d" % tcp_server.socket.getsockname())
 
1972
    if use_ipv6:
 
1973
        logger.info(u"Now listening on address %r, port %d,"
 
1974
                    " flowinfo %d, scope_id %d"
 
1975
                    % tcp_server.socket.getsockname())
 
1976
    else:                       # IPv4
 
1977
        logger.info(u"Now listening on address %r, port %d"
 
1978
                    % tcp_server.socket.getsockname())
1178
1979
    
1179
1980
    #service.interface = tcp_server.socket.getsockname()[3]
1180
1981
    
1181
1982
    try:
1182
1983
        # From the Avahi example code
1183
 
        server.connect_to_signal("StateChanged", server_state_changed)
1184
1984
        try:
1185
 
            server_state_changed(server.GetState())
 
1985
            service.activate()
1186
1986
        except dbus.exceptions.DBusException, error:
1187
1987
            logger.critical(u"DBusException: %s", error)
 
1988
            cleanup()
1188
1989
            sys.exit(1)
1189
1990
        # End of Avahi example code
1190
1991
        
1197
1998
        main_loop.run()
1198
1999
    except AvahiError, error:
1199
2000
        logger.critical(u"AvahiError: %s", error)
 
2001
        cleanup()
1200
2002
        sys.exit(1)
1201
2003
    except KeyboardInterrupt:
1202
2004
        if debug:
1203
2005
            print >> sys.stderr
1204
 
        logger.debug("Server received KeyboardInterrupt")
1205
 
    logger.debug("Server exiting")
 
2006
        logger.debug(u"Server received KeyboardInterrupt")
 
2007
    logger.debug(u"Server exiting")
 
2008
    # Must run before the D-Bus bus name gets deregistered
 
2009
    cleanup()
1206
2010
 
1207
2011
if __name__ == '__main__':
1208
2012
    main()