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- Committer: Teddy Hogeborn
- Date: 2009-09-05 01:46:42 UTC
- mto: (24.1.139 mandos) (237.12.2 mandos-persistent) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 264.
- Revision ID: teddy@fukt.bsnet.se-20090905014642-36108sqop1ci0z0m
* plugins.d/mandos-client.c (start_mandos_communication): Check
"quit_now"
throughout.
Always close
socket and
deinit GnuTLS
properly.
(browse_callback): Return immediately if "quit_now" is set.
"quit_now"
throughout.
Always close
socket and
deinit GnuTLS
properly.
(browse_callback): Return immediately if "quit_now" is set.
- files modified:
- INSTALL
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" 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
57
56
import logging.handlers
58
57
import pwd
59
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
60
62
61
63
import dbus
62
64
import dbus.service
66
68
import ctypes
67
69
import ctypes.util
68
70
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
71
try:
72
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
73
except AttributeError:
74
try:
75
from IN import SO_BINDTODEVICE
76
except ImportError:
77
SO_BINDTODEVICE = None
78
79
80
version = "1.0.11"
81
82
logger = logging.Logger(u'mandos')
72
83
syslogger = (logging.handlers.SysLogHandler
73
84
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
85
address = "/dev/log"))
75
86
syslogger.setFormatter(logging.Formatter
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
u' %(message)s'))
78
89
logger.addHandler(syslogger)
79
90
80
91
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
83
95
logger.addHandler(console)
84
96
85
97
class AvahiError(Exception):
98
110
99
111
class AvahiService(object):
100
112
"""An Avahi (Zeroconf) service.
113
101
114
Attributes:
102
115
interface: integer; avahi.IF_UNSPEC or an interface index.
103
116
Used to optionally bind to the specified interface.
104
name: string; Example: 'Mandos'
105
type: string; Example: '_mandos._tcp'.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
106
119
See <http://www.dns-sd.org/ServiceTypes.html>
107
120
port: integer; what port to announce
108
121
TXT: list of strings; TXT record for the service
111
124
max_renames: integer; maximum number of renames
112
125
rename_count: integer; counter so we only rename after collisions
113
126
a sensible number of times
127
group: D-Bus Entry Group
128
server: D-Bus Server
129
bus: dbus.SystemBus()
114
130
"""
115
131
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
132
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768):
133
domain = u"", host = u"", max_renames = 32768,
134
protocol = avahi.PROTO_UNSPEC, bus = None):
118
135
self.interface = interface
119
136
self.name = name
120
137
self.type = servicetype
124
141
self.host = host
125
142
self.rename_count = 0
126
143
self.max_renames = max_renames
144
self.protocol = protocol
145
self.group = None # our entry group
146
self.server = None
147
self.bus = bus
127
148
def rename(self):
128
149
"""Derived from the Avahi example code"""
129
150
if self.rename_count >= self.max_renames:
131
152
u" after %i retries, exiting.",
132
153
self.rename_count)
133
154
raise AvahiServiceError(u"Too many renames")
134
self.name = server.GetAlternativeServiceName(self.name)
155
self.name = self.server.GetAlternativeServiceName(self.name)
135
156
logger.info(u"Changing Zeroconf service name to %r ...",
136
str(self.name))
157
unicode(self.name))
137
158
syslogger.setFormatter(logging.Formatter
138
('Mandos (%s): %%(levelname)s:'
139
' %%(message)s' % self.name))
159
(u'Mandos (%s) [%%(process)d]:'
160
u' %%(levelname)s: %%(message)s'
161
% self.name))
140
162
self.remove()
141
163
self.add()
142
164
self.rename_count += 1
143
165
def remove(self):
144
166
"""Derived from the Avahi example code"""
145
if group is not None:
146
group.Reset()
167
if self.group is not None:
168
self.group.Reset()
147
169
def add(self):
148
170
"""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)
171
if self.group is None:
172
self.group = dbus.Interface(
173
self.bus.get_object(avahi.DBUS_NAME,
174
self.server.EntryGroupNew()),
175
avahi.DBUS_INTERFACE_ENTRY_GROUP)
176
self.group.connect_to_signal('StateChanged',
177
self.entry_group_state_changed)
157
178
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):
179
self.name, self.type)
180
self.group.AddService(
181
self.interface,
182
self.protocol,
183
dbus.UInt32(0), # flags
184
self.name, self.type,
185
self.domain, self.host,
186
dbus.UInt16(self.port),
187
avahi.string_array_to_txt_array(self.TXT))
188
self.group.Commit()
189
def entry_group_state_changed(self, state, error):
190
"""Derived from the Avahi example code"""
191
logger.debug(u"Avahi state change: %i", state)
192
193
if state == avahi.ENTRY_GROUP_ESTABLISHED:
194
logger.debug(u"Zeroconf service established.")
195
elif state == avahi.ENTRY_GROUP_COLLISION:
196
logger.warning(u"Zeroconf service name collision.")
197
self.rename()
198
elif state == avahi.ENTRY_GROUP_FAILURE:
199
logger.critical(u"Avahi: Error in group state changed %s",
200
unicode(error))
201
raise AvahiGroupError(u"State changed: %s"
202
% unicode(error))
203
def cleanup(self):
204
"""Derived from the Avahi example code"""
205
if self.group is not None:
206
self.group.Free()
207
self.group = None
208
def server_state_changed(self, state):
209
"""Derived from the Avahi example code"""
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
212
self.remove()
213
elif state == avahi.SERVER_RUNNING:
214
self.add()
215
def activate(self):
216
"""Derived from the Avahi example code"""
217
if self.server is None:
218
self.server = dbus.Interface(
219
self.bus.get_object(avahi.DBUS_NAME,
220
avahi.DBUS_PATH_SERVER),
221
avahi.DBUS_INTERFACE_SERVER)
222
self.server.connect_to_signal(u"StateChanged",
223
self.server_state_changed)
224
self.server_state_changed(self.server.GetState())
225
226
227
class Client(object):
180
228
"""A representation of a client host served by this server.
229
181
230
Attributes:
182
231
name: string; from the config file, used in log messages and
183
232
D-Bus identifiers
203
252
client lives. %() expansions are done at
204
253
runtime with vars(self) as dict, so that for
205
254
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
255
current_checker_command: string; current running checker_command
208
256
"""
257
258
@staticmethod
259
def _datetime_to_milliseconds(dt):
260
"Convert a datetime.datetime() to milliseconds"
261
return ((dt.days * 24 * 60 * 60 * 1000)
262
+ (dt.seconds * 1000)
263
+ (dt.microseconds // 1000))
264
209
265
def timeout_milliseconds(self):
210
266
"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))
267
return self._datetime_to_milliseconds(self.timeout)
214
268
215
269
def interval_milliseconds(self):
216
270
"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))
271
return self._datetime_to_milliseconds(self.interval)
220
272
221
def __init__(self, name = None, disable_hook=None, config=None,
222
use_dbus=True):
273
def __init__(self, name = None, disable_hook=None, config=None):
223
274
"""Note: the 'checker' key in 'config' sets the
224
275
'checker_command' attribute and *not* the 'checker'
225
276
attribute."""
227
278
if config is None:
228
279
config = {}
229
280
logger.debug(u"Creating client %r", self.name)
230
self.use_dbus = False # During __init__
231
281
# Uppercase and remove spaces from fingerprint for later
232
282
# comparison purposes with return value from the fingerprint()
233
283
# function
234
self.fingerprint = (config["fingerprint"].upper()
284
self.fingerprint = (config[u"fingerprint"].upper()
235
285
.replace(u" ", u""))
236
286
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:
287
if u"secret" in config:
288
self.secret = config[u"secret"].decode(u"base64")
289
elif u"secfile" in config:
240
290
with closing(open(os.path.expanduser
241
291
(os.path.expandvars
242
(config["secfile"])))) as secfile:
292
(config[u"secfile"])))) as secfile:
243
293
self.secret = secfile.read()
244
294
else:
245
295
raise TypeError(u"No secret or secfile for client %s"
246
296
% self.name)
247
self.host = config.get("host", "")
297
self.host = config.get(u"host", u"")
248
298
self.created = datetime.datetime.utcnow()
249
299
self.enabled = False
250
300
self.last_enabled = None
251
301
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
254
304
self.disable_hook = disable_hook
255
305
self.checker = None
256
306
self.checker_initiator_tag = None
257
307
self.disable_initiator_tag = None
258
308
self.checker_callback_tag = None
259
self.checker_command = config["checker"]
309
self.checker_command = config[u"checker"]
310
self.current_checker_command = None
260
311
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)
270
312
271
313
def enable(self):
272
314
"""Start this client's checker and timeout hooks"""
315
if getattr(self, u"enabled", False):
316
# Already enabled
317
return
273
318
self.last_enabled = datetime.datetime.utcnow()
274
319
# Schedule a new checker to be started an 'interval' from now,
275
320
# and every interval from then on.
283
328
(self.timeout_milliseconds(),
284
329
self.disable))
285
330
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)))
293
331
294
332
def disable(self):
295
333
"""Disable this client."""
296
334
if not getattr(self, "enabled", False):
297
335
return False
298
336
logger.info(u"Disabling client %s", self.name)
299
if getattr(self, "disable_initiator_tag", False):
337
if getattr(self, u"disable_initiator_tag", False):
300
338
gobject.source_remove(self.disable_initiator_tag)
301
339
self.disable_initiator_tag = None
302
if getattr(self, "checker_initiator_tag", False):
340
if getattr(self, u"checker_initiator_tag", False):
303
341
gobject.source_remove(self.checker_initiator_tag)
304
342
self.checker_initiator_tag = None
305
343
self.stop_checker()
306
344
if self.disable_hook:
307
345
self.disable_hook(self)
308
346
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
347
# Do not run this again if called by a gobject.timeout_add
314
348
return False
315
349
321
355
"""The checker has completed, so take appropriate actions."""
322
356
self.checker_callback_tag = None
323
357
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
358
if os.WIFEXITED(condition):
329
359
exitstatus = os.WEXITSTATUS(condition)
330
360
if exitstatus == 0:
334
364
else:
335
365
logger.info(u"Checker for %(name)s failed",
336
366
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
367
else:
343
368
logger.warning(u"Checker for %(name)s crashed?",
344
369
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
370
351
371
def checked_ok(self):
352
372
"""Bump up the timeout for this client.
373
353
374
This should only be called when the client has been seen,
354
375
alive and well.
355
376
"""
358
379
self.disable_initiator_tag = (gobject.timeout_add
359
380
(self.timeout_milliseconds(),
360
381
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
382
368
383
def start_checker(self):
369
384
"""Start a new checker subprocess if one is not running.
385
370
386
If a checker already exists, leave it running and do
371
387
nothing."""
372
388
# The reason for not killing a running checker is that if we
377
393
# checkers alone, the checker would have to take more time
378
394
# than 'timeout' for the client to be declared invalid, which
379
395
# is as it should be.
396
397
# If a checker exists, make sure it is not a zombie
398
if self.checker is not None:
399
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
400
if pid:
401
logger.warning(u"Checker was a zombie")
402
gobject.source_remove(self.checker_callback_tag)
403
self.checker_callback(pid, status,
404
self.current_checker_command)
405
# Start a new checker if needed
380
406
if self.checker is None:
381
407
try:
382
408
# In case checker_command has exactly one % operator
383
409
command = self.checker_command % self.host
384
410
except TypeError:
385
411
# Escape attributes for the shell
386
escaped_attrs = dict((key, re.escape(str(val)))
412
escaped_attrs = dict((key,
413
re.escape(unicode(str(val),
414
errors=
415
u'replace')))
387
416
for key, val in
388
417
vars(self).iteritems())
389
418
try:
392
421
logger.error(u'Could not format string "%s":'
393
422
u' %s', self.checker_command, error)
394
423
return True # Try again later
424
self.current_checker_command = command
395
425
try:
396
426
logger.info(u"Starting checker %r for %s",
397
427
command, self.name)
401
431
# always replaced by /dev/null.)
402
432
self.checker = subprocess.Popen(command,
403
433
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))
434
shell=True, cwd=u"/")
411
435
self.checker_callback_tag = (gobject.child_watch_add
412
436
(self.checker.pid,
413
437
self.checker_callback,
414
438
data=command))
439
# The checker may have completed before the gobject
440
# watch was added. Check for this.
441
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
442
if pid:
443
gobject.source_remove(self.checker_callback_tag)
444
self.checker_callback(pid, status, command)
415
445
except OSError, error:
416
446
logger.error(u"Failed to start subprocess: %s",
417
447
error)
423
453
if self.checker_callback_tag:
424
454
gobject.source_remove(self.checker_callback_tag)
425
455
self.checker_callback_tag = None
426
if getattr(self, "checker", None) is None:
456
if getattr(self, u"checker", None) is None:
427
457
return
428
458
logger.debug(u"Stopping checker for %(name)s", vars(self))
429
459
try:
435
465
if error.errno != errno.ESRCH: # No such process
436
466
raise
437
467
self.checker = None
438
if self.use_dbus:
439
self.PropertyChanged(dbus.String(u"checker_running"),
440
dbus.Boolean(False, variant_level=1))
441
468
442
469
def still_valid(self):
443
470
"""Has the timeout not yet passed for this client?"""
444
if not getattr(self, "enabled", False):
471
if not getattr(self, u"enabled", False):
445
472
return False
446
473
now = datetime.datetime.utcnow()
447
474
if self.last_checked_ok is None:
448
475
return now < (self.created + self.timeout)
449
476
else:
450
477
return now < (self.last_checked_ok + self.timeout)
478
479
480
class ClientDBus(Client, dbus.service.Object):
481
"""A Client class using D-Bus
482
483
Attributes:
484
dbus_object_path: dbus.ObjectPath
485
bus: dbus.SystemBus()
486
"""
487
# dbus.service.Object doesn't use super(), so we can't either.
488
489
def __init__(self, bus = None, *args, **kwargs):
490
self.bus = bus
491
Client.__init__(self, *args, **kwargs)
492
# Only now, when this client is initialized, can it show up on
493
# the D-Bus
494
self.dbus_object_path = (dbus.ObjectPath
495
(u"/clients/"
496
+ self.name.replace(u".", u"_")))
497
dbus.service.Object.__init__(self, self.bus,
498
self.dbus_object_path)
499
500
@staticmethod
501
def _datetime_to_dbus(dt, variant_level=0):
502
"""Convert a UTC datetime.datetime() to a D-Bus type."""
503
return dbus.String(dt.isoformat(),
504
variant_level=variant_level)
505
506
def enable(self):
507
oldstate = getattr(self, u"enabled", False)
508
r = Client.enable(self)
509
if oldstate != self.enabled:
510
# Emit D-Bus signals
511
self.PropertyChanged(dbus.String(u"enabled"),
512
dbus.Boolean(True, variant_level=1))
513
self.PropertyChanged(
514
dbus.String(u"last_enabled"),
515
self._datetime_to_dbus(self.last_enabled,
516
variant_level=1))
517
return r
518
519
def disable(self, signal = True):
520
oldstate = getattr(self, u"enabled", False)
521
r = Client.disable(self)
522
if signal and oldstate != self.enabled:
523
# Emit D-Bus signal
524
self.PropertyChanged(dbus.String(u"enabled"),
525
dbus.Boolean(False, variant_level=1))
526
return r
527
528
def __del__(self, *args, **kwargs):
529
try:
530
self.remove_from_connection()
531
except LookupError:
532
pass
533
if hasattr(dbus.service.Object, u"__del__"):
534
dbus.service.Object.__del__(self, *args, **kwargs)
535
Client.__del__(self, *args, **kwargs)
536
537
def checker_callback(self, pid, condition, command,
538
*args, **kwargs):
539
self.checker_callback_tag = None
540
self.checker = None
541
# Emit D-Bus signal
542
self.PropertyChanged(dbus.String(u"checker_running"),
543
dbus.Boolean(False, variant_level=1))
544
if os.WIFEXITED(condition):
545
exitstatus = os.WEXITSTATUS(condition)
546
# Emit D-Bus signal
547
self.CheckerCompleted(dbus.Int16(exitstatus),
548
dbus.Int64(condition),
549
dbus.String(command))
550
else:
551
# Emit D-Bus signal
552
self.CheckerCompleted(dbus.Int16(-1),
553
dbus.Int64(condition),
554
dbus.String(command))
555
556
return Client.checker_callback(self, pid, condition, command,
557
*args, **kwargs)
558
559
def checked_ok(self, *args, **kwargs):
560
r = Client.checked_ok(self, *args, **kwargs)
561
# Emit D-Bus signal
562
self.PropertyChanged(
563
dbus.String(u"last_checked_ok"),
564
(self._datetime_to_dbus(self.last_checked_ok,
565
variant_level=1)))
566
return r
567
568
def start_checker(self, *args, **kwargs):
569
old_checker = self.checker
570
if self.checker is not None:
571
old_checker_pid = self.checker.pid
572
else:
573
old_checker_pid = None
574
r = Client.start_checker(self, *args, **kwargs)
575
# Only if new checker process was started
576
if (self.checker is not None
577
and old_checker_pid != self.checker.pid):
578
# Emit D-Bus signal
579
self.CheckerStarted(self.current_checker_command)
580
self.PropertyChanged(
581
dbus.String(u"checker_running"),
582
dbus.Boolean(True, variant_level=1))
583
return r
584
585
def stop_checker(self, *args, **kwargs):
586
old_checker = getattr(self, u"checker", None)
587
r = Client.stop_checker(self, *args, **kwargs)
588
if (old_checker is not None
589
and getattr(self, u"checker", None) is None):
590
self.PropertyChanged(dbus.String(u"checker_running"),
591
dbus.Boolean(False, variant_level=1))
592
return r
451
593
452
594
## D-Bus methods & signals
453
595
_interface = u"se.bsnet.fukt.Mandos.Client"
454
596
455
597
# CheckedOK - method
456
CheckedOK = dbus.service.method(_interface)(checked_ok)
457
CheckedOK.__name__ = "CheckedOK"
598
@dbus.service.method(_interface)
599
def CheckedOK(self):
600
return self.checked_ok()
458
601
459
602
# CheckerCompleted - signal
460
@dbus.service.signal(_interface, signature="nxs")
603
@dbus.service.signal(_interface, signature=u"nxs")
461
604
def CheckerCompleted(self, exitcode, waitstatus, command):
462
605
"D-Bus signal"
463
606
pass
464
607
465
608
# CheckerStarted - signal
466
@dbus.service.signal(_interface, signature="s")
609
@dbus.service.signal(_interface, signature=u"s")
467
610
def CheckerStarted(self, command):
468
611
"D-Bus signal"
469
612
pass
470
613
471
614
# GetAllProperties - method
472
@dbus.service.method(_interface, out_signature="a{sv}")
615
@dbus.service.method(_interface, out_signature=u"a{sv}")
473
616
def GetAllProperties(self):
474
617
"D-Bus method"
475
618
return dbus.Dictionary({
476
dbus.String("name"):
619
dbus.String(u"name"):
477
620
dbus.String(self.name, variant_level=1),
478
dbus.String("fingerprint"):
621
dbus.String(u"fingerprint"):
479
622
dbus.String(self.fingerprint, variant_level=1),
480
dbus.String("host"):
623
dbus.String(u"host"):
481
624
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)
625
dbus.String(u"created"):
626
self._datetime_to_dbus(self.created,
627
variant_level=1),
628
dbus.String(u"last_enabled"):
629
(self._datetime_to_dbus(self.last_enabled,
630
variant_level=1)
487
631
if self.last_enabled is not None
488
632
else dbus.Boolean(False, variant_level=1)),
489
dbus.String("enabled"):
633
dbus.String(u"enabled"):
490
634
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)
635
dbus.String(u"last_checked_ok"):
636
(self._datetime_to_dbus(self.last_checked_ok,
637
variant_level=1)
494
638
if self.last_checked_ok is not None
495
639
else dbus.Boolean (False, variant_level=1)),
496
dbus.String("timeout"):
640
dbus.String(u"timeout"):
497
641
dbus.UInt64(self.timeout_milliseconds(),
498
642
variant_level=1),
499
dbus.String("interval"):
643
dbus.String(u"interval"):
500
644
dbus.UInt64(self.interval_milliseconds(),
501
645
variant_level=1),
502
dbus.String("checker"):
646
dbus.String(u"checker"):
503
647
dbus.String(self.checker_command,
504
648
variant_level=1),
505
dbus.String("checker_running"):
649
dbus.String(u"checker_running"):
506
650
dbus.Boolean(self.checker is not None,
507
651
variant_level=1),
508
dbus.String("object_path"):
652
dbus.String(u"object_path"):
509
653
dbus.ObjectPath(self.dbus_object_path,
510
654
variant_level=1)
511
}, signature="sv")
655
}, signature=u"sv")
512
656
513
657
# IsStillValid - method
514
IsStillValid = (dbus.service.method(_interface, out_signature="b")
515
(still_valid))
516
IsStillValid.__name__ = "IsStillValid"
658
@dbus.service.method(_interface, out_signature=u"b")
659
def IsStillValid(self):
660
return self.still_valid()
517
661
518
662
# PropertyChanged - signal
519
@dbus.service.signal(_interface, signature="sv")
663
@dbus.service.signal(_interface, signature=u"sv")
520
664
def PropertyChanged(self, property, value):
521
665
"D-Bus signal"
522
666
pass
523
667
668
# ReceivedSecret - signal
669
@dbus.service.signal(_interface)
670
def ReceivedSecret(self):
671
"D-Bus signal"
672
pass
673
674
# Rejected - signal
675
@dbus.service.signal(_interface)
676
def Rejected(self):
677
"D-Bus signal"
678
pass
679
524
680
# SetChecker - method
525
@dbus.service.method(_interface, in_signature="s")
681
@dbus.service.method(_interface, in_signature=u"s")
526
682
def SetChecker(self, checker):
527
683
"D-Bus setter method"
528
684
self.checker_command = checker
532
688
variant_level=1))
533
689
534
690
# SetHost - method
535
@dbus.service.method(_interface, in_signature="s")
691
@dbus.service.method(_interface, in_signature=u"s")
536
692
def SetHost(self, host):
537
693
"D-Bus setter method"
538
694
self.host = host
541
697
dbus.String(self.host, variant_level=1))
542
698
543
699
# SetInterval - method
544
@dbus.service.method(_interface, in_signature="t")
700
@dbus.service.method(_interface, in_signature=u"t")
545
701
def SetInterval(self, milliseconds):
546
702
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
547
703
# Emit D-Bus signal
550
706
variant_level=1)))
551
707
552
708
# SetSecret - method
553
@dbus.service.method(_interface, in_signature="ay",
709
@dbus.service.method(_interface, in_signature=u"ay",
554
710
byte_arrays=True)
555
711
def SetSecret(self, secret):
556
712
"D-Bus setter method"
557
713
self.secret = str(secret)
558
714
559
715
# SetTimeout - method
560
@dbus.service.method(_interface, in_signature="t")
716
@dbus.service.method(_interface, in_signature=u"t")
561
717
def SetTimeout(self, milliseconds):
562
718
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
563
719
# Emit D-Bus signal
566
722
variant_level=1)))
567
723
568
724
# Enable - method
569
Enable = dbus.service.method(_interface)(enable)
570
Enable.__name__ = "Enable"
725
@dbus.service.method(_interface)
726
def Enable(self):
727
"D-Bus method"
728
self.enable()
571
729
572
730
# StartChecker - method
573
731
@dbus.service.method(_interface)
582
740
self.disable()
583
741
584
742
# StopChecker - method
585
StopChecker = dbus.service.method(_interface)(stop_checker)
586
StopChecker.__name__ = "StopChecker"
743
@dbus.service.method(_interface)
744
def StopChecker(self):
745
self.stop_checker()
587
746
588
747
del _interface
589
748
590
749
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.
750
class ClientHandler(socketserver.BaseRequestHandler, object):
751
"""A class to handle client connections.
752
753
Instantiated once for each connection to handle it.
655
754
Note: This will run in its own forked process."""
656
755
657
756
def handle(self):
658
757
logger.info(u"TCP connection from: %s",
659
758
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.
759
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
760
# Open IPC pipe to parent process
761
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
762
session = (gnutls.connection
763
.ClientSession(self.request,
764
gnutls.connection
765
.X509Credentials()))
766
767
line = self.request.makefile().readline()
768
logger.debug(u"Protocol version: %r", line)
769
try:
770
if int(line.strip().split()[0]) > 1:
771
raise RuntimeError
772
except (ValueError, IndexError, RuntimeError), error:
773
logger.error(u"Unknown protocol version: %s", error)
774
return
775
776
# Note: gnutls.connection.X509Credentials is really a
777
# generic GnuTLS certificate credentials object so long as
778
# no X.509 keys are added to it. Therefore, we can use it
779
# here despite using OpenPGP certificates.
780
781
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
782
# u"+AES-256-CBC", u"+SHA1",
783
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
784
# u"+DHE-DSS"))
785
# Use a fallback default, since this MUST be set.
786
priority = self.server.gnutls_priority
787
if priority is None:
788
priority = u"NORMAL"
789
(gnutls.library.functions
790
.gnutls_priority_set_direct(session._c_object,
791
priority, None))
792
793
try:
794
session.handshake()
795
except gnutls.errors.GNUTLSError, error:
796
logger.warning(u"Handshake failed: %s", error)
797
# Do not run session.bye() here: the session is not
798
# established. Just abandon the request.
799
return
800
logger.debug(u"Handshake succeeded")
801
try:
802
fpr = self.fingerprint(self.peer_certificate(session))
803
except (TypeError, gnutls.errors.GNUTLSError), error:
804
logger.warning(u"Bad certificate: %s", error)
805
session.bye()
806
return
807
logger.debug(u"Fingerprint: %s", fpr)
808
809
for c in self.server.clients:
810
if c.fingerprint == fpr:
811
client = c
812
break
813
else:
814
ipc.write(u"NOTFOUND %s %s\n"
815
% (fpr, unicode(self.client_address)))
816
session.bye()
817
return
818
# Have to check if client.still_valid(), since it is
819
# possible that the client timed out while establishing
820
# the GnuTLS session.
821
if not client.still_valid():
822
ipc.write(u"INVALID %s\n" % client.name)
823
session.bye()
824
return
825
ipc.write(u"SENDING %s\n" % client.name)
826
sent_size = 0
827
while sent_size < len(client.secret):
828
sent = session.send(client.secret[sent_size:])
829
logger.debug(u"Sent: %d, remaining: %d",
830
sent, len(client.secret)
831
- (sent_size + sent))
832
sent_size += sent
833
session.bye()
834
835
@staticmethod
836
def peer_certificate(session):
837
"Return the peer's OpenPGP certificate as a bytestring"
838
# If not an OpenPGP certificate...
839
if (gnutls.library.functions
840
.gnutls_certificate_type_get(session._c_object)
841
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
842
# ...do the normal thing
843
return session.peer_certificate
844
list_size = ctypes.c_uint(1)
845
cert_list = (gnutls.library.functions
846
.gnutls_certificate_get_peers
847
(session._c_object, ctypes.byref(list_size)))
848
if not bool(cert_list) and list_size.value != 0:
849
raise gnutls.errors.GNUTLSError(u"error getting peer"
850
u" certificate")
851
if list_size.value == 0:
852
return None
853
cert = cert_list[0]
854
return ctypes.string_at(cert.data, cert.size)
855
856
@staticmethod
857
def fingerprint(openpgp):
858
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
859
# New GnuTLS "datum" with the OpenPGP public key
860
datum = (gnutls.library.types
861
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
862
ctypes.POINTER
863
(ctypes.c_ubyte)),
864
ctypes.c_uint(len(openpgp))))
865
# New empty GnuTLS certificate
866
crt = gnutls.library.types.gnutls_openpgp_crt_t()
867
(gnutls.library.functions
868
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
869
# Import the OpenPGP public key into the certificate
870
(gnutls.library.functions
871
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
872
gnutls.library.constants
873
.GNUTLS_OPENPGP_FMT_RAW))
874
# Verify the self signature in the key
875
crtverify = ctypes.c_uint()
876
(gnutls.library.functions
877
.gnutls_openpgp_crt_verify_self(crt, 0,
878
ctypes.byref(crtverify)))
879
if crtverify.value != 0:
880
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
881
raise (gnutls.errors.CertificateSecurityError
882
(u"Verify failed"))
883
# New buffer for the fingerprint
884
buf = ctypes.create_string_buffer(20)
885
buf_len = ctypes.c_size_t()
886
# Get the fingerprint from the certificate into the buffer
887
(gnutls.library.functions
888
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
889
ctypes.byref(buf_len)))
890
# Deinit the certificate
891
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
892
# Convert the buffer to a Python bytestring
893
fpr = ctypes.string_at(buf, buf_len.value)
894
# Convert the bytestring to hexadecimal notation
895
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
896
return hex_fpr
897
898
899
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
900
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
901
def process_request(self, request, client_address):
902
"""Overrides and wraps the original process_request().
903
904
This function creates a new pipe in self.pipe
905
"""
906
self.pipe = os.pipe()
907
super(ForkingMixInWithPipe,
908
self).process_request(request, client_address)
909
os.close(self.pipe[1]) # close write end
910
self.add_pipe(self.pipe[0])
911
def add_pipe(self, pipe):
912
"""Dummy function; override as necessary"""
913
os.close(pipe)
914
915
916
class IPv6_TCPServer(ForkingMixInWithPipe,
917
socketserver.TCPServer, object):
918
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
919
736
920
Attributes:
737
settings: Server settings
738
clients: Set() of Client objects
739
921
enabled: Boolean; whether this server is activated yet
922
interface: None or a network interface name (string)
923
use_ipv6: Boolean; to use IPv6 or not
740
924
"""
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)
925
def __init__(self, server_address, RequestHandlerClass,
926
interface=None, use_ipv6=True):
927
self.interface = interface
928
if use_ipv6:
929
self.address_family = socket.AF_INET6
930
socketserver.TCPServer.__init__(self, server_address,
931
RequestHandlerClass)
751
932
def server_bind(self):
752
933
"""This overrides the normal server_bind() function
753
934
to bind to an interface if one was specified, and also NOT to
754
935
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
936
if self.interface is not None:
937
if SO_BINDTODEVICE is None:
938
logger.error(u"SO_BINDTODEVICE does not exist;"
939
u" cannot bind to interface %s",
940
self.interface)
941
else:
942
try:
943
self.socket.setsockopt(socket.SOL_SOCKET,
944
SO_BINDTODEVICE,
945
str(self.interface
946
+ u'\0'))
947
except socket.error, error:
948
if error[0] == errno.EPERM:
949
logger.error(u"No permission to"
950
u" bind to interface %s",
951
self.interface)
952
elif error[0] == errno.ENOPROTOOPT:
953
logger.error(u"SO_BINDTODEVICE not available;"
954
u" cannot bind to interface %s",
955
self.interface)
956
else:
957
raise
769
958
# Only bind(2) the socket if we really need to.
770
959
if self.server_address[0] or self.server_address[1]:
771
960
if not self.server_address[0]:
772
in6addr_any = "::"
773
self.server_address = (in6addr_any,
961
if self.address_family == socket.AF_INET6:
962
any_address = u"::" # in6addr_any
963
else:
964
any_address = socket.INADDR_ANY
965
self.server_address = (any_address,
774
966
self.server_address[1])
775
967
elif not self.server_address[1]:
776
968
self.server_address = (self.server_address[0],
777
969
0)
778
# if self.settings["interface"]:
970
# if self.interface:
779
971
# self.server_address = (self.server_address[0],
780
972
# 0, # port
781
973
# 0, # flowinfo
782
974
# if_nametoindex
783
# (self.settings
784
# ["interface"]))
785
return super(IPv6_TCPServer, self).server_bind()
975
# (self.interface))
976
return socketserver.TCPServer.server_bind(self)
977
978
979
class MandosServer(IPv6_TCPServer):
980
"""Mandos server.
981
982
Attributes:
983
clients: set of Client objects
984
gnutls_priority GnuTLS priority string
985
use_dbus: Boolean; to emit D-Bus signals or not
986
clients: set of Client objects
987
gnutls_priority GnuTLS priority string
988
use_dbus: Boolean; to emit D-Bus signals or not
989
990
Assumes a gobject.MainLoop event loop.
991
"""
992
def __init__(self, server_address, RequestHandlerClass,
993
interface=None, use_ipv6=True, clients=None,
994
gnutls_priority=None, use_dbus=True):
995
self.enabled = False
996
self.clients = clients
997
if self.clients is None:
998
self.clients = set()
999
self.use_dbus = use_dbus
1000
self.gnutls_priority = gnutls_priority
1001
IPv6_TCPServer.__init__(self, server_address,
1002
RequestHandlerClass,
1003
interface = interface,
1004
use_ipv6 = use_ipv6)
786
1005
def server_activate(self):
787
1006
if self.enabled:
788
return super(IPv6_TCPServer, self).server_activate()
1007
return socketserver.TCPServer.server_activate(self)
789
1008
def enable(self):
790
1009
self.enabled = True
1010
def add_pipe(self, pipe):
1011
# Call "handle_ipc" for both data and EOF events
1012
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1013
self.handle_ipc)
1014
def handle_ipc(self, source, condition, file_objects={}):
1015
condition_names = {
1016
gobject.IO_IN: u"IN", # There is data to read.
1017
gobject.IO_OUT: u"OUT", # Data can be written (without
1018
# blocking).
1019
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1020
gobject.IO_ERR: u"ERR", # Error condition.
1021
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1022
# broken, usually for pipes and
1023
# sockets).
1024
}
1025
conditions_string = ' | '.join(name
1026
for cond, name in
1027
condition_names.iteritems()
1028
if cond & condition)
1029
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1030
conditions_string)
1031
1032
# Turn the pipe file descriptor into a Python file object
1033
if source not in file_objects:
1034
file_objects[source] = os.fdopen(source, u"r", 1)
1035
1036
# Read a line from the file object
1037
cmdline = file_objects[source].readline()
1038
if not cmdline: # Empty line means end of file
1039
# close the IPC pipe
1040
file_objects[source].close()
1041
del file_objects[source]
1042
1043
# Stop calling this function
1044
return False
1045
1046
logger.debug(u"IPC command: %r", cmdline)
1047
1048
# Parse and act on command
1049
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1050
1051
if cmd == u"NOTFOUND":
1052
logger.warning(u"Client not found for fingerprint: %s",
1053
args)
1054
if self.use_dbus:
1055
# Emit D-Bus signal
1056
mandos_dbus_service.ClientNotFound(args)
1057
elif cmd == u"INVALID":
1058
for client in self.clients:
1059
if client.name == args:
1060
logger.warning(u"Client %s is invalid", args)
1061
if self.use_dbus:
1062
# Emit D-Bus signal
1063
client.Rejected()
1064
break
1065
else:
1066
logger.error(u"Unknown client %s is invalid", args)
1067
elif cmd == u"SENDING":
1068
for client in self.clients:
1069
if client.name == args:
1070
logger.info(u"Sending secret to %s", client.name)
1071
client.checked_ok()
1072
if self.use_dbus:
1073
# Emit D-Bus signal
1074
client.ReceivedSecret()
1075
break
1076
else:
1077
logger.error(u"Sending secret to unknown client %s",
1078
args)
1079
else:
1080
logger.error(u"Unknown IPC command: %r", cmdline)
1081
1082
# Keep calling this function
1083
return True
791
1084
792
1085
793
1086
def string_to_delta(interval):
794
1087
"""Parse a string and return a datetime.timedelta
795
1088
796
>>> string_to_delta('7d')
1089
>>> string_to_delta(u'7d')
797
1090
datetime.timedelta(7)
798
>>> string_to_delta('60s')
1091
>>> string_to_delta(u'60s')
799
1092
datetime.timedelta(0, 60)
800
>>> string_to_delta('60m')
1093
>>> string_to_delta(u'60m')
801
1094
datetime.timedelta(0, 3600)
802
>>> string_to_delta('24h')
1095
>>> string_to_delta(u'24h')
803
1096
datetime.timedelta(1)
804
1097
>>> string_to_delta(u'1w')
805
1098
datetime.timedelta(7)
806
>>> string_to_delta('5m 30s')
1099
>>> string_to_delta(u'5m 30s')
807
1100
datetime.timedelta(0, 330)
808
1101
"""
809
1102
timevalue = datetime.timedelta(0)
829
1122
return timevalue
830
1123
831
1124
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
1125
def if_nametoindex(interface):
856
"""Call the C function if_nametoindex(), or equivalent"""
1126
"""Call the C function if_nametoindex(), or equivalent
1127
1128
Note: This function cannot accept a unicode string."""
857
1129
global if_nametoindex
858
1130
try:
859
1131
if_nametoindex = (ctypes.cdll.LoadLibrary
860
(ctypes.util.find_library("c"))
1132
(ctypes.util.find_library(u"c"))
861
1133
.if_nametoindex)
862
1134
except (OSError, AttributeError):
863
if "struct" not in sys.modules:
864
import struct
865
if "fcntl" not in sys.modules:
866
import fcntl
1135
logger.warning(u"Doing if_nametoindex the hard way")
867
1136
def if_nametoindex(interface):
868
1137
"Get an interface index the hard way, i.e. using fcntl()"
869
1138
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
870
1139
with closing(socket.socket()) as s:
871
1140
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
872
struct.pack("16s16x", interface))
873
interface_index = struct.unpack("I", ifreq[16:20])[0]
1141
struct.pack(str(u"16s16x"),
1142
interface))
1143
interface_index = struct.unpack(str(u"I"),
1144
ifreq[16:20])[0]
874
1145
return interface_index
875
1146
return if_nametoindex(interface)
876
1147
877
1148
878
1149
def daemon(nochdir = False, noclose = False):
879
1150
"""See daemon(3). Standard BSD Unix function.
1151
880
1152
This should really exist as os.daemon, but it doesn't (yet)."""
881
1153
if os.fork():
882
1154
sys.exit()
883
1155
os.setsid()
884
1156
if not nochdir:
885
os.chdir("/")
1157
os.chdir(u"/")
886
1158
if os.fork():
887
1159
sys.exit()
888
1160
if not noclose:
890
1162
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
891
1163
if not stat.S_ISCHR(os.fstat(null).st_mode):
892
1164
raise OSError(errno.ENODEV,
893
"/dev/null not a character device")
1165
u"/dev/null not a character device")
894
1166
os.dup2(null, sys.stdin.fileno())
895
1167
os.dup2(null, sys.stdout.fileno())
896
1168
os.dup2(null, sys.stderr.fileno())
899
1171
900
1172
901
1173
def main():
1174
1175
######################################################################
1176
# Parsing of options, both command line and config file
1177
902
1178
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")
1179
parser.add_option("-i", u"--interface", type=u"string",
1180
metavar="IF", help=u"Bind to interface IF")
1181
parser.add_option("-a", u"--address", type=u"string",
1182
help=u"Address to listen for requests on")
1183
parser.add_option("-p", u"--port", type=u"int",
1184
help=u"Port number to receive requests on")
1185
parser.add_option("--check", action=u"store_true",
1186
help=u"Run self-test")
1187
parser.add_option("--debug", action=u"store_true",
1188
help=u"Debug mode; run in foreground and log to"
1189
u" terminal")
1190
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1191
u" priority string (see GnuTLS documentation)")
1192
parser.add_option("--servicename", type=u"string",
1193
metavar=u"NAME", help=u"Zeroconf service name")
1194
parser.add_option("--configdir", type=u"string",
1195
default=u"/etc/mandos", metavar=u"DIR",
1196
help=u"Directory to search for configuration"
1197
u" files")
1198
parser.add_option("--no-dbus", action=u"store_false",
1199
dest=u"use_dbus", help=u"Do not provide D-Bus"
1200
u" system bus interface")
1201
parser.add_option("--no-ipv6", action=u"store_false",
1202
dest=u"use_ipv6", help=u"Do not use IPv6")
926
1203
options = parser.parse_args()[0]
927
1204
928
1205
if options.check:
931
1208
sys.exit()
932
1209
933
1210
# 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",
1211
server_defaults = { u"interface": u"",
1212
u"address": u"",
1213
u"port": u"",
1214
u"debug": u"False",
1215
u"priority":
1216
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1217
u"servicename": u"Mandos",
1218
u"use_dbus": u"True",
1219
u"use_ipv6": u"True",
942
1220
}
943
1221
944
1222
# Parse config file for server-global settings
945
server_config = ConfigParser.SafeConfigParser(server_defaults)
1223
server_config = configparser.SafeConfigParser(server_defaults)
946
1224
del server_defaults
947
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1225
server_config.read(os.path.join(options.configdir,
1226
u"mandos.conf"))
948
1227
# Convert the SafeConfigParser object to a dict
949
1228
server_settings = server_config.defaults()
950
1229
# 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")
1230
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1231
server_settings[option] = server_config.getboolean(u"DEFAULT",
1232
option)
955
1233
if server_settings["port"]:
956
server_settings["port"] = server_config.getint("DEFAULT",
957
"port")
1234
server_settings["port"] = server_config.getint(u"DEFAULT",
1235
u"port")
958
1236
del server_config
959
1237
960
1238
# Override the settings from the config file with command line
961
1239
# options, if set.
962
for option in ("interface", "address", "port", "debug",
963
"priority", "servicename", "configdir",
964
"use_dbus"):
1240
for option in (u"interface", u"address", u"port", u"debug",
1241
u"priority", u"servicename", u"configdir",
1242
u"use_dbus", u"use_ipv6"):
965
1243
value = getattr(options, option)
966
1244
if value is not None:
967
1245
server_settings[option] = value
968
1246
del options
1247
# Force all strings to be unicode
1248
for option in server_settings.keys():
1249
if type(server_settings[option]) is str:
1250
server_settings[option] = unicode(server_settings[option])
969
1251
# Now we have our good server settings in "server_settings"
970
1252
1253
##################################################################
1254
971
1255
# For convenience
972
debug = server_settings["debug"]
973
use_dbus = server_settings["use_dbus"]
1256
debug = server_settings[u"debug"]
1257
use_dbus = server_settings[u"use_dbus"]
1258
use_ipv6 = server_settings[u"use_ipv6"]
974
1259
975
1260
if not debug:
976
1261
syslogger.setLevel(logging.WARNING)
977
1262
console.setLevel(logging.WARNING)
978
1263
979
if server_settings["servicename"] != "Mandos":
1264
if server_settings[u"servicename"] != u"Mandos":
980
1265
syslogger.setFormatter(logging.Formatter
981
('Mandos (%s): %%(levelname)s:'
982
' %%(message)s'
983
% server_settings["servicename"]))
1266
(u'Mandos (%s) [%%(process)d]:'
1267
u' %%(levelname)s: %%(message)s'
1268
% server_settings[u"servicename"]))
984
1269
985
1270
# Parse config file with clients
986
client_defaults = { "timeout": "1h",
987
"interval": "5m",
988
"checker": "fping -q -- %%(host)s",
989
"host": "",
1271
client_defaults = { u"timeout": u"1h",
1272
u"interval": u"5m",
1273
u"checker": u"fping -q -- %%(host)s",
1274
u"host": u"",
990
1275
}
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"
1276
client_config = configparser.SafeConfigParser(client_defaults)
1277
client_config.read(os.path.join(server_settings[u"configdir"],
1278
u"clients.conf"))
1279
1280
global mandos_dbus_service
1281
mandos_dbus_service = None
1282
1283
tcp_server = MandosServer((server_settings[u"address"],
1284
server_settings[u"port"]),
1285
ClientHandler,
1286
interface=server_settings[u"interface"],
1287
use_ipv6=use_ipv6,
1288
gnutls_priority=
1289
server_settings[u"priority"],
1290
use_dbus=use_dbus)
1291
pidfilename = u"/var/run/mandos.pid"
1002
1292
try:
1003
pidfile = open(pidfilename, "w")
1293
pidfile = open(pidfilename, u"w")
1004
1294
except IOError:
1005
logger.error("Could not open file %r", pidfilename)
1295
logger.error(u"Could not open file %r", pidfilename)
1006
1296
1007
1297
try:
1008
uid = pwd.getpwnam("_mandos").pw_uid
1009
gid = pwd.getpwnam("_mandos").pw_gid
1298
uid = pwd.getpwnam(u"_mandos").pw_uid
1299
gid = pwd.getpwnam(u"_mandos").pw_gid
1010
1300
except KeyError:
1011
1301
try:
1012
uid = pwd.getpwnam("mandos").pw_uid
1013
gid = pwd.getpwnam("mandos").pw_gid
1302
uid = pwd.getpwnam(u"mandos").pw_uid
1303
gid = pwd.getpwnam(u"mandos").pw_gid
1014
1304
except KeyError:
1015
1305
try:
1016
uid = pwd.getpwnam("nobody").pw_uid
1017
gid = pwd.getpwnam("nogroup").pw_gid
1306
uid = pwd.getpwnam(u"nobody").pw_uid
1307
gid = pwd.getpwnam(u"nobody").pw_gid
1018
1308
except KeyError:
1019
1309
uid = 65534
1020
1310
gid = 65534
1033
1323
1034
1324
@gnutls.library.types.gnutls_log_func
1035
1325
def debug_gnutls(level, string):
1036
logger.debug("GnuTLS: %s", string[:-1])
1326
logger.debug(u"GnuTLS: %s", string[:-1])
1037
1327
1038
1328
(gnutls.library.functions
1039
1329
.gnutls_global_set_log_function(debug_gnutls))
1040
1330
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
1048
1331
global main_loop
1049
global bus
1050
global server
1051
1332
# From the Avahi example code
1052
1333
DBusGMainLoop(set_as_default=True )
1053
1334
main_loop = gobject.MainLoop()
1054
1335
bus = dbus.SystemBus()
1055
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1056
avahi.DBUS_PATH_SERVER),
1057
avahi.DBUS_INTERFACE_SERVER)
1058
1336
# End of Avahi example code
1059
1337
if use_dbus:
1060
1338
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1339
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1340
service = AvahiService(name = server_settings[u"servicename"],
1341
servicetype = u"_mandos._tcp",
1342
protocol = protocol, bus = bus)
1343
if server_settings["interface"]:
1344
service.interface = (if_nametoindex
1345
(str(server_settings[u"interface"])))
1061
1346
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:
1347
client_class = Client
1348
if use_dbus:
1349
client_class = functools.partial(ClientDBus, bus = bus)
1350
tcp_server.clients.update(set(
1351
client_class(name = section,
1352
config= dict(client_config.items(section)))
1353
for section in client_config.sections()))
1354
if not tcp_server.clients:
1068
1355
logger.warning(u"No clients defined")
1069
1356
1070
1357
if debug:
1080
1367
daemon()
1081
1368
1082
1369
try:
1083
pid = os.getpid()
1084
pidfile.write(str(pid) + "\n")
1085
pidfile.close()
1370
with closing(pidfile):
1371
pid = os.getpid()
1372
pidfile.write(str(pid) + "\n")
1086
1373
del pidfile
1087
1374
except IOError:
1088
1375
logger.error(u"Could not write to file %r with PID %d",
1094
1381
1095
1382
def cleanup():
1096
1383
"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
1384
service.cleanup()
1103
1385
1104
while clients:
1105
client = clients.pop()
1386
while tcp_server.clients:
1387
client = tcp_server.clients.pop()
1106
1388
client.disable_hook = None
1107
1389
client.disable()
1108
1390
1114
1396
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1115
1397
1116
1398
if use_dbus:
1117
class MandosServer(dbus.service.Object):
1399
class MandosDBusService(dbus.service.Object):
1118
1400
"""A D-Bus proxy object"""
1119
1401
def __init__(self):
1120
dbus.service.Object.__init__(self, bus, "/")
1402
dbus.service.Object.__init__(self, bus, u"/")
1121
1403
_interface = u"se.bsnet.fukt.Mandos"
1122
1404
1123
@dbus.service.signal(_interface, signature="oa{sv}")
1405
@dbus.service.signal(_interface, signature=u"oa{sv}")
1124
1406
def ClientAdded(self, objpath, properties):
1125
1407
"D-Bus signal"
1126
1408
pass
1127
1409
1128
@dbus.service.signal(_interface, signature="os")
1410
@dbus.service.signal(_interface, signature=u"s")
1411
def ClientNotFound(self, fingerprint):
1412
"D-Bus signal"
1413
pass
1414
1415
@dbus.service.signal(_interface, signature=u"os")
1129
1416
def ClientRemoved(self, objpath, name):
1130
1417
"D-Bus signal"
1131
1418
pass
1132
1419
1133
@dbus.service.method(_interface, out_signature="ao")
1420
@dbus.service.method(_interface, out_signature=u"ao")
1134
1421
def GetAllClients(self):
1135
1422
"D-Bus method"
1136
return dbus.Array(c.dbus_object_path for c in clients)
1423
return dbus.Array(c.dbus_object_path
1424
for c in tcp_server.clients)
1137
1425
1138
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1426
@dbus.service.method(_interface,
1427
out_signature=u"a{oa{sv}}")
1139
1428
def GetAllClientsWithProperties(self):
1140
1429
"D-Bus method"
1141
1430
return dbus.Dictionary(
1142
1431
((c.dbus_object_path, c.GetAllProperties())
1143
for c in clients),
1144
signature="oa{sv}")
1432
for c in tcp_server.clients),
1433
signature=u"oa{sv}")
1145
1434
1146
@dbus.service.method(_interface, in_signature="o")
1435
@dbus.service.method(_interface, in_signature=u"o")
1147
1436
def RemoveClient(self, object_path):
1148
1437
"D-Bus method"
1149
for c in clients:
1438
for c in tcp_server.clients:
1150
1439
if c.dbus_object_path == object_path:
1151
clients.remove(c)
1440
tcp_server.clients.remove(c)
1441
c.remove_from_connection()
1152
1442
# Don't signal anything except ClientRemoved
1153
c.use_dbus = False
1154
c.disable()
1443
c.disable(signal=False)
1155
1444
# Emit D-Bus signal
1156
1445
self.ClientRemoved(object_path, c.name)
1157
1446
return
1159
1448
1160
1449
del _interface
1161
1450
1162
mandos_server = MandosServer()
1451
mandos_dbus_service = MandosDBusService()
1163
1452
1164
for client in clients:
1453
for client in tcp_server.clients:
1165
1454
if use_dbus:
1166
1455
# Emit D-Bus signal
1167
mandos_server.ClientAdded(client.dbus_object_path,
1168
client.GetAllProperties())
1456
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1457
client.GetAllProperties())
1169
1458
client.enable()
1170
1459
1171
1460
tcp_server.enable()
1173
1462
1174
1463
# Find out what port we got
1175
1464
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())
1465
if use_ipv6:
1466
logger.info(u"Now listening on address %r, port %d,"
1467
" flowinfo %d, scope_id %d"
1468
% tcp_server.socket.getsockname())
1469
else: # IPv4
1470
logger.info(u"Now listening on address %r, port %d"
1471
% tcp_server.socket.getsockname())
1178
1472
1179
1473
#service.interface = tcp_server.socket.getsockname()[3]
1180
1474
1181
1475
try:
1182
1476
# From the Avahi example code
1183
server.connect_to_signal("StateChanged", server_state_changed)
1184
1477
try:
1185
server_state_changed(server.GetState())
1478
service.activate()
1186
1479
except dbus.exceptions.DBusException, error:
1187
1480
logger.critical(u"DBusException: %s", error)
1188
1481
sys.exit(1)
1201
1494
except KeyboardInterrupt:
1202
1495
if debug:
1203
1496
print >> sys.stderr
1204
logger.debug("Server received KeyboardInterrupt")
1205
logger.debug("Server exiting")
1497
logger.debug(u"Server received KeyboardInterrupt")
1498
logger.debug(u"Server exiting")
1206
1499
1207
1500
if __name__ == '__main__':
1208
1501
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0