To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 157
- compare with another revision
- download diff
- download tarball
- view history from revision 157
- Committer: Teddy Hogeborn
- Date: 2008-09-04 14:04:09 UTC
- Revision ID: teddy@fukt.bsnet.se-20080904140409-anr3hckg8ew7q60e
* plugin-runner.xml (BUGS): Document the non-recursiveness of the
"--config-file" option.
"--config-file" option.
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- .bzrignore
added
removed
mandos
11
11
# and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
31
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
#
33
32
34
from __future__ import division, with_statement, absolute_import
33
from __future__ import division
35
34
36
35
import SocketServer
37
36
import socket
38
import optparse
37
import select
38
from optparse import OptionParser
39
39
import datetime
40
40
import errno
41
41
import gnutls.crypto
55
55
import stat
56
56
import logging
57
57
import logging.handlers
58
import pwd
59
from contextlib import closing
60
58
61
59
import dbus
62
import dbus.service
63
60
import gobject
64
61
import avahi
65
62
from dbus.mainloop.glib import DBusGMainLoop
66
63
import ctypes
67
import ctypes.util
68
64
69
version = "1.0.5"
65
version = "1.0"
70
66
71
67
logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
68
syslogger = logging.handlers.SysLogHandler\
69
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
70
address = "/dev/log")
71
syslogger.setFormatter(logging.Formatter\
72
('Mandos: %(levelname)s: %(message)s'))
77
73
logger.addHandler(syslogger)
78
74
79
75
console = logging.StreamHandler()
82
78
logger.addHandler(console)
83
79
84
80
class AvahiError(Exception):
85
def __init__(self, value, *args, **kwargs):
81
def __init__(self, value):
86
82
self.value = value
87
super(AvahiError, self).__init__(value, *args, **kwargs)
88
def __unicode__(self):
89
return unicode(repr(self.value))
83
def __str__(self):
84
return repr(self.value)
90
85
91
86
class AvahiServiceError(AvahiError):
92
87
pass
112
107
a sensible number of times
113
108
"""
114
109
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
110
type = None, port = None, TXT = None, domain = "",
111
host = "", max_renames = 32768):
117
112
self.interface = interface
118
113
self.name = name
119
self.type = servicetype
114
self.type = type
120
115
self.port = port
121
self.TXT = TXT if TXT is not None else []
116
if TXT is None:
117
self.TXT = []
118
else:
119
self.TXT = TXT
122
120
self.domain = domain
123
121
self.host = host
124
122
self.rename_count = 0
128
126
if self.rename_count >= self.max_renames:
129
127
logger.critical(u"No suitable Zeroconf service name found"
130
128
u" after %i retries, exiting.",
131
self.rename_count)
132
raise AvahiServiceError(u"Too many renames")
129
rename_count)
130
raise AvahiServiceError("Too many renames")
133
131
self.name = server.GetAlternativeServiceName(self.name)
134
132
logger.info(u"Changing Zeroconf service name to %r ...",
135
133
str(self.name))
136
syslogger.setFormatter(logging.Formatter
134
syslogger.setFormatter(logging.Formatter\
137
135
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
136
' %%(message)s' % self.name))
139
137
self.remove()
140
138
self.add()
141
139
self.rename_count += 1
147
145
"""Derived from the Avahi example code"""
148
146
global group
149
147
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
152
150
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
152
group.connect_to_signal('StateChanged',
155
153
entry_group_state_changed)
156
154
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
170
168
# End of Avahi example code
171
169
172
170
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
171
class Client(object):
179
172
"""A representation of a client host served by this server.
180
173
Attributes:
181
name: string; from the config file, used in log messages and
182
D-Bus identifiers
174
name: string; from the config file, used in log messages
183
175
fingerprint: string (40 or 32 hexadecimal digits); used to
184
176
uniquely identify the client
185
secret: bytestring; sent verbatim (over TLS) to client
186
host: string; available for use by the checker command
187
created: datetime.datetime(); (UTC) object creation
188
last_enabled: datetime.datetime(); (UTC)
189
enabled: bool()
190
last_checked_ok: datetime.datetime(); (UTC) or None
191
timeout: datetime.timedelta(); How long from last_checked_ok
192
until this client is invalid
193
interval: datetime.timedelta(); How often to start a new checker
194
disable_hook: If set, called by disable() as disable_hook(self)
195
checker: subprocess.Popen(); a running checker process used
196
to see if the client lives.
197
'None' if no process is running.
177
secret: bytestring; sent verbatim (over TLS) to client
178
host: string; available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
until this client is invalid
183
interval: datetime.timedelta(); How often to start a new checker
184
stop_hook: If set, called by stop() as stop_hook(self)
185
checker: subprocess.Popen(); a running checker process used
186
to see if the client lives.
187
'None' if no process is running.
198
188
checker_initiator_tag: a gobject event source tag, or None
199
disable_initiator_tag: - '' -
189
stop_initiator_tag: - '' -
200
190
checker_callback_tag: - '' -
201
191
checker_command: string; External command which is run to check if
202
192
client lives. %() expansions are done at
203
193
runtime with vars(self) as dict, so that for
204
194
instance %(name)s can be used in the command.
205
use_dbus: bool(); Whether to provide D-Bus interface and signals
206
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
195
Private attibutes:
196
_timeout: Real variable for 'timeout'
197
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
199
_interval_milliseconds: - '' -
207
200
"""
208
def timeout_milliseconds(self):
209
"Return the 'timeout' attribute in milliseconds"
210
return ((self.timeout.days * 24 * 60 * 60 * 1000)
211
+ (self.timeout.seconds * 1000)
212
+ (self.timeout.microseconds // 1000))
213
214
def interval_milliseconds(self):
215
"Return the 'interval' attribute in milliseconds"
216
return ((self.interval.days * 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds * 1000)
218
+ (self.interval.microseconds // 1000))
219
220
def __init__(self, name = None, disable_hook=None, config=None,
221
use_dbus=True):
201
def _set_timeout(self, timeout):
202
"Setter function for 'timeout' attribute"
203
self._timeout = timeout
204
self._timeout_milliseconds = ((self.timeout.days
205
* 24 * 60 * 60 * 1000)
206
+ (self.timeout.seconds * 1000)
207
+ (self.timeout.microseconds
208
// 1000))
209
timeout = property(lambda self: self._timeout,
210
_set_timeout)
211
del _set_timeout
212
def _set_interval(self, interval):
213
"Setter function for 'interval' attribute"
214
self._interval = interval
215
self._interval_milliseconds = ((self.interval.days
216
* 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds
218
* 1000)
219
+ (self.interval.microseconds
220
// 1000))
221
interval = property(lambda self: self._interval,
222
_set_interval)
223
del _set_interval
224
def __init__(self, name = None, stop_hook=None, config={}):
222
225
"""Note: the 'checker' key in 'config' sets the
223
226
'checker_command' attribute and *not* the 'checker'
224
227
attribute."""
225
228
self.name = name
226
if config is None:
227
config = {}
228
229
logger.debug(u"Creating client %r", self.name)
229
self.use_dbus = False # During __init__
230
230
# Uppercase and remove spaces from fingerprint for later
231
231
# comparison purposes with return value from the fingerprint()
232
232
# function
233
self.fingerprint = (config["fingerprint"].upper()
234
.replace(u" ", u""))
233
self.fingerprint = config["fingerprint"].upper()\
234
.replace(u" ", u"")
235
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
236
if "secret" in config:
237
237
self.secret = config["secret"].decode(u"base64")
238
238
elif "secfile" in config:
239
with closing(open(os.path.expanduser
240
(os.path.expandvars
241
(config["secfile"])))) as secfile:
242
self.secret = secfile.read()
239
sf = open(config["secfile"])
240
self.secret = sf.read()
241
sf.close()
243
242
else:
244
243
raise TypeError(u"No secret or secfile for client %s"
245
244
% self.name)
246
245
self.host = config.get("host", "")
247
self.created = datetime.datetime.utcnow()
248
self.enabled = False
249
self.last_enabled = None
246
self.created = datetime.datetime.now()
250
247
self.last_checked_ok = None
251
248
self.timeout = string_to_delta(config["timeout"])
252
249
self.interval = string_to_delta(config["interval"])
253
self.disable_hook = disable_hook
250
self.stop_hook = stop_hook
254
251
self.checker = None
255
252
self.checker_initiator_tag = None
256
self.disable_initiator_tag = None
253
self.stop_initiator_tag = None
257
254
self.checker_callback_tag = None
258
self.checker_command = config["checker"]
259
self.last_connect = None
260
# Only now, when this client is initialized, can it show up on
261
# the D-Bus
262
self.use_dbus = use_dbus
263
if self.use_dbus:
264
self.dbus_object_path = (dbus.ObjectPath
265
("/clients/"
266
+ self.name.replace(".", "_")))
267
dbus.service.Object.__init__(self, bus,
268
self.dbus_object_path)
269
270
def enable(self):
255
self.check_command = config["checker"]
256
def start(self):
271
257
"""Start this client's checker and timeout hooks"""
272
self.last_enabled = datetime.datetime.utcnow()
273
258
# Schedule a new checker to be started an 'interval' from now,
274
259
# and every interval from then on.
275
self.checker_initiator_tag = (gobject.timeout_add
276
(self.interval_milliseconds(),
277
self.start_checker))
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
self.start_checker)
278
263
# Also start a new checker *right now*.
279
264
self.start_checker()
280
# Schedule a disable() when 'timeout' has passed
281
self.disable_initiator_tag = (gobject.timeout_add
282
(self.timeout_milliseconds(),
283
self.disable))
284
self.enabled = True
285
if self.use_dbus:
286
# Emit D-Bus signals
287
self.PropertyChanged(dbus.String(u"enabled"),
288
dbus.Boolean(True, variant_level=1))
289
self.PropertyChanged(dbus.String(u"last_enabled"),
290
(_datetime_to_dbus(self.last_enabled,
291
variant_level=1)))
292
293
def disable(self):
294
"""Disable this client."""
295
if not getattr(self, "enabled", False):
265
# Schedule a stop() when 'timeout' has passed
266
self.stop_initiator_tag = gobject.timeout_add\
267
(self._timeout_milliseconds,
268
self.stop)
269
def stop(self):
270
"""Stop this client.
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
274
if hasattr(self, "secret") and self.secret:
275
logger.info(u"Stopping client %s", self.name)
276
self.secret = None
277
else:
296
278
return False
297
logger.info(u"Disabling client %s", self.name)
298
if getattr(self, "disable_initiator_tag", False):
299
gobject.source_remove(self.disable_initiator_tag)
300
self.disable_initiator_tag = None
279
if getattr(self, "stop_initiator_tag", False):
280
gobject.source_remove(self.stop_initiator_tag)
281
self.stop_initiator_tag = None
301
282
if getattr(self, "checker_initiator_tag", False):
302
283
gobject.source_remove(self.checker_initiator_tag)
303
284
self.checker_initiator_tag = None
304
285
self.stop_checker()
305
if self.disable_hook:
306
self.disable_hook(self)
307
self.enabled = False
308
if self.use_dbus:
309
# Emit D-Bus signal
310
self.PropertyChanged(dbus.String(u"enabled"),
311
dbus.Boolean(False, variant_level=1))
286
if self.stop_hook:
287
self.stop_hook(self)
312
288
# Do not run this again if called by a gobject.timeout_add
313
289
return False
314
315
290
def __del__(self):
316
self.disable_hook = None
317
self.disable()
318
319
def checker_callback(self, pid, condition, command):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
320
294
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
321
296
self.checker_callback_tag = None
322
297
self.checker = None
323
if self.use_dbus:
324
# Emit D-Bus signal
325
self.PropertyChanged(dbus.String(u"checker_running"),
326
dbus.Boolean(False, variant_level=1))
327
if os.WIFEXITED(condition):
328
exitstatus = os.WEXITSTATUS(condition)
329
if exitstatus == 0:
330
logger.info(u"Checker for %(name)s succeeded",
331
vars(self))
332
self.checked_ok()
333
else:
334
logger.info(u"Checker for %(name)s failed",
335
vars(self))
336
if self.use_dbus:
337
# Emit D-Bus signal
338
self.CheckerCompleted(dbus.Int16(exitstatus),
339
dbus.Int64(condition),
340
dbus.String(command))
341
else:
298
if os.WIFEXITED(condition) \
299
and (os.WEXITSTATUS(condition) == 0):
300
logger.info(u"Checker for %(name)s succeeded",
301
vars(self))
302
self.last_checked_ok = now
303
gobject.source_remove(self.stop_initiator_tag)
304
self.stop_initiator_tag = gobject.timeout_add\
305
(self._timeout_milliseconds,
306
self.stop)
307
elif not os.WIFEXITED(condition):
342
308
logger.warning(u"Checker for %(name)s crashed?",
343
309
vars(self))
344
if self.use_dbus:
345
# Emit D-Bus signal
346
self.CheckerCompleted(dbus.Int16(-1),
347
dbus.Int64(condition),
348
dbus.String(command))
349
350
def checked_ok(self):
351
"""Bump up the timeout for this client.
352
This should only be called when the client has been seen,
353
alive and well.
354
"""
355
self.last_checked_ok = datetime.datetime.utcnow()
356
gobject.source_remove(self.disable_initiator_tag)
357
self.disable_initiator_tag = (gobject.timeout_add
358
(self.timeout_milliseconds(),
359
self.disable))
360
if self.use_dbus:
361
# Emit D-Bus signal
362
self.PropertyChanged(
363
dbus.String(u"last_checked_ok"),
364
(_datetime_to_dbus(self.last_checked_ok,
365
variant_level=1)))
366
310
else:
311
logger.info(u"Checker for %(name)s failed",
312
vars(self))
367
313
def start_checker(self):
368
314
"""Start a new checker subprocess if one is not running.
369
315
If a checker already exists, leave it running and do
378
324
# is as it should be.
379
325
if self.checker is None:
380
326
try:
381
# In case checker_command has exactly one % operator
382
command = self.checker_command % self.host
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.host
383
329
except TypeError:
384
330
# Escape attributes for the shell
385
331
escaped_attrs = dict((key, re.escape(str(val)))
386
332
for key, val in
387
333
vars(self).iteritems())
388
334
try:
389
command = self.checker_command % escaped_attrs
335
command = self.check_command % escaped_attrs
390
336
except TypeError, error:
391
337
logger.error(u'Could not format string "%s":'
392
u' %s', self.checker_command, error)
338
u' %s', self.check_command, error)
393
339
return True # Try again later
394
340
try:
395
341
logger.info(u"Starting checker %r for %s",
401
347
self.checker = subprocess.Popen(command,
402
348
close_fds=True,
403
349
shell=True, cwd="/")
404
if self.use_dbus:
405
# Emit D-Bus signal
406
self.CheckerStarted(command)
407
self.PropertyChanged(
408
dbus.String("checker_running"),
409
dbus.Boolean(True, variant_level=1))
410
self.checker_callback_tag = (gobject.child_watch_add
411
(self.checker.pid,
412
self.checker_callback,
413
data=command))
350
self.checker_callback_tag = gobject.child_watch_add\
351
(self.checker.pid,
352
self.checker_callback)
414
353
except OSError, error:
415
354
logger.error(u"Failed to start subprocess: %s",
416
355
error)
417
356
# Re-run this periodically if run by gobject.timeout_add
418
357
return True
419
420
358
def stop_checker(self):
421
359
"""Force the checker process, if any, to stop."""
422
360
if self.checker_callback_tag:
434
372
if error.errno != errno.ESRCH: # No such process
435
373
raise
436
374
self.checker = None
437
if self.use_dbus:
438
self.PropertyChanged(dbus.String(u"checker_running"),
439
dbus.Boolean(False, variant_level=1))
440
441
375
def still_valid(self):
442
376
"""Has the timeout not yet passed for this client?"""
443
if not getattr(self, "enabled", False):
444
return False
445
now = datetime.datetime.utcnow()
377
now = datetime.datetime.now()
446
378
if self.last_checked_ok is None:
447
379
return now < (self.created + self.timeout)
448
380
else:
449
381
return now < (self.last_checked_ok + self.timeout)
450
451
## D-Bus methods & signals
452
_interface = u"se.bsnet.fukt.Mandos.Client"
453
454
# CheckedOK - method
455
CheckedOK = dbus.service.method(_interface)(checked_ok)
456
CheckedOK.__name__ = "CheckedOK"
457
458
# CheckerCompleted - signal
459
@dbus.service.signal(_interface, signature="nxs")
460
def CheckerCompleted(self, exitcode, waitstatus, command):
461
"D-Bus signal"
462
pass
463
464
# CheckerStarted - signal
465
@dbus.service.signal(_interface, signature="s")
466
def CheckerStarted(self, command):
467
"D-Bus signal"
468
pass
469
470
# GetAllProperties - method
471
@dbus.service.method(_interface, out_signature="a{sv}")
472
def GetAllProperties(self):
473
"D-Bus method"
474
return dbus.Dictionary({
475
dbus.String("name"):
476
dbus.String(self.name, variant_level=1),
477
dbus.String("fingerprint"):
478
dbus.String(self.fingerprint, variant_level=1),
479
dbus.String("host"):
480
dbus.String(self.host, variant_level=1),
481
dbus.String("created"):
482
_datetime_to_dbus(self.created, variant_level=1),
483
dbus.String("last_enabled"):
484
(_datetime_to_dbus(self.last_enabled,
485
variant_level=1)
486
if self.last_enabled is not None
487
else dbus.Boolean(False, variant_level=1)),
488
dbus.String("enabled"):
489
dbus.Boolean(self.enabled, variant_level=1),
490
dbus.String("last_checked_ok"):
491
(_datetime_to_dbus(self.last_checked_ok,
492
variant_level=1)
493
if self.last_checked_ok is not None
494
else dbus.Boolean (False, variant_level=1)),
495
dbus.String("timeout"):
496
dbus.UInt64(self.timeout_milliseconds(),
497
variant_level=1),
498
dbus.String("interval"):
499
dbus.UInt64(self.interval_milliseconds(),
500
variant_level=1),
501
dbus.String("checker"):
502
dbus.String(self.checker_command,
503
variant_level=1),
504
dbus.String("checker_running"):
505
dbus.Boolean(self.checker is not None,
506
variant_level=1),
507
dbus.String("object_path"):
508
dbus.ObjectPath(self.dbus_object_path,
509
variant_level=1)
510
}, signature="sv")
511
512
# IsStillValid - method
513
IsStillValid = (dbus.service.method(_interface, out_signature="b")
514
(still_valid))
515
IsStillValid.__name__ = "IsStillValid"
516
517
# PropertyChanged - signal
518
@dbus.service.signal(_interface, signature="sv")
519
def PropertyChanged(self, property, value):
520
"D-Bus signal"
521
pass
522
523
# SetChecker - method
524
@dbus.service.method(_interface, in_signature="s")
525
def SetChecker(self, checker):
526
"D-Bus setter method"
527
self.checker_command = checker
528
# Emit D-Bus signal
529
self.PropertyChanged(dbus.String(u"checker"),
530
dbus.String(self.checker_command,
531
variant_level=1))
532
533
# SetHost - method
534
@dbus.service.method(_interface, in_signature="s")
535
def SetHost(self, host):
536
"D-Bus setter method"
537
self.host = host
538
# Emit D-Bus signal
539
self.PropertyChanged(dbus.String(u"host"),
540
dbus.String(self.host, variant_level=1))
541
542
# SetInterval - method
543
@dbus.service.method(_interface, in_signature="t")
544
def SetInterval(self, milliseconds):
545
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
546
# Emit D-Bus signal
547
self.PropertyChanged(dbus.String(u"interval"),
548
(dbus.UInt64(self.interval_milliseconds(),
549
variant_level=1)))
550
551
# SetSecret - method
552
@dbus.service.method(_interface, in_signature="ay",
553
byte_arrays=True)
554
def SetSecret(self, secret):
555
"D-Bus setter method"
556
self.secret = str(secret)
557
558
# SetTimeout - method
559
@dbus.service.method(_interface, in_signature="t")
560
def SetTimeout(self, milliseconds):
561
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
562
# Emit D-Bus signal
563
self.PropertyChanged(dbus.String(u"timeout"),
564
(dbus.UInt64(self.timeout_milliseconds(),
565
variant_level=1)))
566
567
# Enable - method
568
Enable = dbus.service.method(_interface)(enable)
569
Enable.__name__ = "Enable"
570
571
# StartChecker - method
572
@dbus.service.method(_interface)
573
def StartChecker(self):
574
"D-Bus method"
575
self.start_checker()
576
577
# Disable - method
578
@dbus.service.method(_interface)
579
def Disable(self):
580
"D-Bus method"
581
self.disable()
582
583
# StopChecker - method
584
StopChecker = dbus.service.method(_interface)(stop_checker)
585
StopChecker.__name__ = "StopChecker"
586
587
del _interface
588
382
589
383
590
384
def peer_certificate(session):
591
385
"Return the peer's OpenPGP certificate as a bytestring"
592
386
# If not an OpenPGP certificate...
593
if (gnutls.library.functions
594
.gnutls_certificate_type_get(session._c_object)
595
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
387
if gnutls.library.functions.gnutls_certificate_type_get\
388
(session._c_object) \
389
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
596
390
# ...do the normal thing
597
391
return session.peer_certificate
598
list_size = ctypes.c_uint(1)
599
cert_list = (gnutls.library.functions
600
.gnutls_certificate_get_peers
601
(session._c_object, ctypes.byref(list_size)))
602
if not bool(cert_list) and list_size.value != 0:
603
raise gnutls.errors.GNUTLSError("error getting peer"
604
" certificate")
392
list_size = ctypes.c_uint()
393
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
394
(session._c_object, ctypes.byref(list_size))
605
395
if list_size.value == 0:
606
396
return None
607
397
cert = cert_list[0]
611
401
def fingerprint(openpgp):
612
402
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
613
403
# New GnuTLS "datum" with the OpenPGP public key
614
datum = (gnutls.library.types
615
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
616
ctypes.POINTER
617
(ctypes.c_ubyte)),
618
ctypes.c_uint(len(openpgp))))
404
datum = gnutls.library.types.gnutls_datum_t\
405
(ctypes.cast(ctypes.c_char_p(openpgp),
406
ctypes.POINTER(ctypes.c_ubyte)),
407
ctypes.c_uint(len(openpgp)))
619
408
# New empty GnuTLS certificate
620
409
crt = gnutls.library.types.gnutls_openpgp_crt_t()
621
(gnutls.library.functions
622
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
410
gnutls.library.functions.gnutls_openpgp_crt_init\
411
(ctypes.byref(crt))
623
412
# Import the OpenPGP public key into the certificate
624
(gnutls.library.functions
625
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
626
gnutls.library.constants
627
.GNUTLS_OPENPGP_FMT_RAW))
413
gnutls.library.functions.gnutls_openpgp_crt_import\
414
(crt, ctypes.byref(datum),
415
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
628
416
# Verify the self signature in the key
629
crtverify = ctypes.c_uint()
630
(gnutls.library.functions
631
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
417
crtverify = ctypes.c_uint();
418
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
419
(crt, 0, ctypes.byref(crtverify))
632
420
if crtverify.value != 0:
633
421
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
634
422
raise gnutls.errors.CertificateSecurityError("Verify failed")
635
423
# New buffer for the fingerprint
636
buf = ctypes.create_string_buffer(20)
637
buf_len = ctypes.c_size_t()
424
buffer = ctypes.create_string_buffer(20)
425
buffer_length = ctypes.c_size_t()
638
426
# Get the fingerprint from the certificate into the buffer
639
(gnutls.library.functions
640
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
641
ctypes.byref(buf_len)))
427
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
428
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
642
429
# Deinit the certificate
643
430
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
644
431
# Convert the buffer to a Python bytestring
645
fpr = ctypes.string_at(buf, buf_len.value)
432
fpr = ctypes.string_at(buffer, buffer_length.value)
646
433
# Convert the bytestring to hexadecimal notation
647
434
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
648
435
return hex_fpr
649
436
650
437
651
class TCP_handler(SocketServer.BaseRequestHandler, object):
438
class tcp_handler(SocketServer.BaseRequestHandler, object):
652
439
"""A TCP request handler class.
653
440
Instantiated by IPv6_TCPServer for each request to handle it.
654
441
Note: This will run in its own forked process."""
655
442
656
443
def handle(self):
657
444
logger.info(u"TCP connection from: %s",
658
unicode(self.client_address))
659
session = (gnutls.connection
660
.ClientSession(self.request,
661
gnutls.connection
662
.X509Credentials()))
445
unicode(self.client_address))
446
session = gnutls.connection.ClientSession\
447
(self.request, gnutls.connection.X509Credentials())
663
448
664
449
line = self.request.makefile().readline()
665
450
logger.debug(u"Protocol version: %r", line)
678
463
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
679
464
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
680
465
# "+DHE-DSS"))
681
# Use a fallback default, since this MUST be set.
682
priority = self.server.settings.get("priority", "NORMAL")
683
(gnutls.library.functions
684
.gnutls_priority_set_direct(session._c_object,
685
priority, None))
466
priority = "NORMAL" # Fallback default, since this
467
# MUST be set.
468
if self.server.settings["priority"]:
469
priority = self.server.settings["priority"]
470
gnutls.library.functions.gnutls_priority_set_direct\
471
(session._c_object, priority, None);
686
472
687
473
try:
688
474
session.handshake()
691
477
# Do not run session.bye() here: the session is not
692
478
# established. Just abandon the request.
693
479
return
694
logger.debug(u"Handshake succeeded")
695
480
try:
696
481
fpr = fingerprint(peer_certificate(session))
697
482
except (TypeError, gnutls.errors.GNUTLSError), error:
699
484
session.bye()
700
485
return
701
486
logger.debug(u"Fingerprint: %s", fpr)
487
client = None
702
488
for c in self.server.clients:
703
489
if c.fingerprint == fpr:
704
490
client = c
705
491
break
706
else:
492
if not client:
707
493
logger.warning(u"Client not found for fingerprint: %s",
708
494
fpr)
709
495
session.bye()
716
502
vars(client))
717
503
session.bye()
718
504
return
719
## This won't work here, since we're in a fork.
720
# client.checked_ok()
721
505
sent_size = 0
722
506
while sent_size < len(client.secret):
723
507
sent = session.send(client.secret[sent_size:])
728
512
session.bye()
729
513
730
514
731
class IPv6_TCPServer(SocketServer.ForkingMixIn,
732
SocketServer.TCPServer, object):
515
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
733
516
"""IPv6 TCP server. Accepts 'None' as address and/or port.
734
517
Attributes:
735
518
settings: Server settings
736
519
clients: Set() of Client objects
737
enabled: Boolean; whether this server is activated yet
738
520
"""
739
521
address_family = socket.AF_INET6
740
522
def __init__(self, *args, **kwargs):
744
526
if "clients" in kwargs:
745
527
self.clients = kwargs["clients"]
746
528
del kwargs["clients"]
747
self.enabled = False
748
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
529
return super(type(self), self).__init__(*args, **kwargs)
749
530
def server_bind(self):
750
531
"""This overrides the normal server_bind() function
751
532
to bind to an interface if one was specified, and also NOT to
780
561
# if_nametoindex
781
562
# (self.settings
782
563
# ["interface"]))
783
return super(IPv6_TCPServer, self).server_bind()
784
def server_activate(self):
785
if self.enabled:
786
return super(IPv6_TCPServer, self).server_activate()
787
def enable(self):
788
self.enabled = True
564
return super(type(self), self).server_bind()
789
565
790
566
791
567
def string_to_delta(interval):
807
583
timevalue = datetime.timedelta(0)
808
584
for s in interval.split():
809
585
try:
810
suffix = unicode(s[-1])
811
value = int(s[:-1])
586
suffix=unicode(s[-1])
587
value=int(s[:-1])
812
588
if suffix == u"d":
813
589
delta = datetime.timedelta(value)
814
590
elif suffix == u"s":
848
624
elif state == avahi.ENTRY_GROUP_FAILURE:
849
625
logger.critical(u"Avahi: Error in group state changed %s",
850
626
unicode(error))
851
raise AvahiGroupError(u"State changed: %s" % unicode(error))
627
raise AvahiGroupError("State changed: %s", str(error))
852
628
853
629
def if_nametoindex(interface):
854
630
"""Call the C function if_nametoindex(), or equivalent"""
855
631
global if_nametoindex
856
632
try:
857
if_nametoindex = (ctypes.cdll.LoadLibrary
858
(ctypes.util.find_library("c"))
859
.if_nametoindex)
633
if "ctypes.util" not in sys.modules:
634
import ctypes.util
635
if_nametoindex = ctypes.cdll.LoadLibrary\
636
(ctypes.util.find_library("c")).if_nametoindex
860
637
except (OSError, AttributeError):
861
638
if "struct" not in sys.modules:
862
639
import struct
865
642
def if_nametoindex(interface):
866
643
"Get an interface index the hard way, i.e. using fcntl()"
867
644
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
868
with closing(socket.socket()) as s:
869
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
870
struct.pack("16s16x", interface))
645
s = socket.socket()
646
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
647
struct.pack("16s16x", interface))
648
s.close()
871
649
interface_index = struct.unpack("I", ifreq[16:20])[0]
872
650
return interface_index
873
651
return if_nametoindex(interface)
897
675
898
676
899
677
def main():
900
parser = optparse.OptionParser(version = "%%prog %s" % version)
678
global main_loop_started
679
main_loop_started = False
680
681
parser = OptionParser(version = "%%prog %s" % version)
901
682
parser.add_option("-i", "--interface", type="string",
902
683
metavar="IF", help="Bind to interface IF")
903
684
parser.add_option("-a", "--address", type="string",
904
685
help="Address to listen for requests on")
905
686
parser.add_option("-p", "--port", type="int",
906
687
help="Port number to receive requests on")
907
parser.add_option("--check", action="store_true",
688
parser.add_option("--check", action="store_true", default=False,
908
689
help="Run self-test")
909
690
parser.add_option("--debug", action="store_true",
910
691
help="Debug mode; run in foreground and log to"
917
698
default="/etc/mandos", metavar="DIR",
918
699
help="Directory to search for configuration"
919
700
" files")
920
parser.add_option("--no-dbus", action="store_false",
921
dest="use_dbus",
922
help="Do not provide D-Bus system bus"
923
" interface")
924
options = parser.parse_args()[0]
701
(options, args) = parser.parse_args()
925
702
926
703
if options.check:
927
704
import doctest
936
713
"priority":
937
714
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
938
715
"servicename": "Mandos",
939
"use_dbus": "True",
940
716
}
941
717
942
718
# Parse config file for server-global settings
945
721
server_config.read(os.path.join(options.configdir, "mandos.conf"))
946
722
# Convert the SafeConfigParser object to a dict
947
723
server_settings = server_config.defaults()
948
# Use the appropriate methods on the non-string config options
949
server_settings["debug"] = server_config.getboolean("DEFAULT",
950
"debug")
951
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
952
"use_dbus")
953
if server_settings["port"]:
954
server_settings["port"] = server_config.getint("DEFAULT",
955
"port")
724
# Use getboolean on the boolean config option
725
server_settings["debug"] = server_config.getboolean\
726
("DEFAULT", "debug")
956
727
del server_config
957
728
958
729
# Override the settings from the config file with command line
959
730
# options, if set.
960
731
for option in ("interface", "address", "port", "debug",
961
"priority", "servicename", "configdir",
962
"use_dbus"):
732
"priority", "servicename", "configdir"):
963
733
value = getattr(options, option)
964
734
if value is not None:
965
735
server_settings[option] = value
966
736
del options
967
737
# Now we have our good server settings in "server_settings"
968
738
969
# For convenience
970
739
debug = server_settings["debug"]
971
use_dbus = server_settings["use_dbus"]
972
740
973
741
if not debug:
974
742
syslogger.setLevel(logging.WARNING)
975
743
console.setLevel(logging.WARNING)
976
744
977
745
if server_settings["servicename"] != "Mandos":
978
syslogger.setFormatter(logging.Formatter
746
syslogger.setFormatter(logging.Formatter\
979
747
('Mandos (%s): %%(levelname)s:'
980
748
' %%(message)s'
981
749
% server_settings["servicename"]))
983
751
# Parse config file with clients
984
752
client_defaults = { "timeout": "1h",
985
753
"interval": "5m",
986
"checker": "fping -q -- %%(host)s",
754
"checker": "fping -q -- %(host)s",
987
755
"host": "",
988
756
}
989
757
client_config = ConfigParser.SafeConfigParser(client_defaults)
990
758
client_config.read(os.path.join(server_settings["configdir"],
991
759
"clients.conf"))
992
760
993
clients = Set()
994
tcp_server = IPv6_TCPServer((server_settings["address"],
995
server_settings["port"]),
996
TCP_handler,
997
settings=server_settings,
998
clients=clients)
999
pidfilename = "/var/run/mandos.pid"
1000
try:
1001
pidfile = open(pidfilename, "w")
1002
except IOError, error:
1003
logger.error("Could not open file %r", pidfilename)
1004
1005
try:
1006
uid = pwd.getpwnam("_mandos").pw_uid
1007
gid = pwd.getpwnam("_mandos").pw_gid
1008
except KeyError:
1009
try:
1010
uid = pwd.getpwnam("mandos").pw_uid
1011
gid = pwd.getpwnam("mandos").pw_gid
1012
except KeyError:
1013
try:
1014
uid = pwd.getpwnam("nobody").pw_uid
1015
gid = pwd.getpwnam("nogroup").pw_gid
1016
except KeyError:
1017
uid = 65534
1018
gid = 65534
1019
try:
1020
os.setuid(uid)
1021
os.setgid(gid)
1022
except OSError, error:
1023
if error[0] != errno.EPERM:
1024
raise error
1025
1026
761
global service
1027
762
service = AvahiService(name = server_settings["servicename"],
1028
servicetype = "_mandos._tcp", )
763
type = "_mandos._tcp", );
1029
764
if server_settings["interface"]:
1030
service.interface = (if_nametoindex
1031
(server_settings["interface"]))
765
service.interface = if_nametoindex\
766
(server_settings["interface"])
1032
767
1033
768
global main_loop
1034
769
global bus
1041
776
avahi.DBUS_PATH_SERVER),
1042
777
avahi.DBUS_INTERFACE_SERVER)
1043
778
# End of Avahi example code
1044
if use_dbus:
1045
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
779
780
clients = Set()
781
def remove_from_clients(client):
782
clients.remove(client)
783
if not clients:
784
logger.critical(u"No clients left, exiting")
785
sys.exit()
1046
786
1047
787
clients.update(Set(Client(name = section,
788
stop_hook = remove_from_clients,
1048
789
config
1049
= dict(client_config.items(section)),
1050
use_dbus = use_dbus)
790
= dict(client_config.items(section)))
1051
791
for section in client_config.sections()))
1052
792
if not clients:
1053
logger.warning(u"No clients defined")
793
logger.critical(u"No clients defined")
794
sys.exit(1)
1054
795
1055
796
if debug:
1056
797
# Redirect stdin so all checkers get /dev/null
1064
805
# Close all input and output, do double fork, etc.
1065
806
daemon()
1066
807
808
pidfilename = "/var/run/mandos/mandos.pid"
809
pid = os.getpid()
1067
810
try:
1068
pid = os.getpid()
811
pidfile = open(pidfilename, "w")
1069
812
pidfile.write(str(pid) + "\n")
1070
813
pidfile.close()
1071
814
del pidfile
1072
except IOError:
1073
logger.error(u"Could not write to file %r with PID %d",
1074
pidfilename, pid)
1075
except NameError:
1076
# "pidfile" was never created
1077
pass
1078
del pidfilename
815
except IOError, err:
816
logger.error(u"Could not write %s file with PID %d",
817
pidfilename, os.getpid())
1079
818
1080
819
def cleanup():
1081
820
"Cleanup function; run on exit"
1088
827
1089
828
while clients:
1090
829
client = clients.pop()
1091
client.disable_hook = None
1092
client.disable()
830
client.stop_hook = None
831
client.stop()
1093
832
1094
833
atexit.register(cleanup)
1095
834
1098
837
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1099
838
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1100
839
1101
if use_dbus:
1102
class MandosServer(dbus.service.Object):
1103
"""A D-Bus proxy object"""
1104
def __init__(self):
1105
dbus.service.Object.__init__(self, bus, "/")
1106
_interface = u"se.bsnet.fukt.Mandos"
1107
1108
@dbus.service.signal(_interface, signature="oa{sv}")
1109
def ClientAdded(self, objpath, properties):
1110
"D-Bus signal"
1111
pass
1112
1113
@dbus.service.signal(_interface, signature="os")
1114
def ClientRemoved(self, objpath, name):
1115
"D-Bus signal"
1116
pass
1117
1118
@dbus.service.method(_interface, out_signature="ao")
1119
def GetAllClients(self):
1120
"D-Bus method"
1121
return dbus.Array(c.dbus_object_path for c in clients)
1122
1123
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1124
def GetAllClientsWithProperties(self):
1125
"D-Bus method"
1126
return dbus.Dictionary(
1127
((c.dbus_object_path, c.GetAllProperties())
1128
for c in clients),
1129
signature="oa{sv}")
1130
1131
@dbus.service.method(_interface, in_signature="o")
1132
def RemoveClient(self, object_path):
1133
"D-Bus method"
1134
for c in clients:
1135
if c.dbus_object_path == object_path:
1136
clients.remove(c)
1137
# Don't signal anything except ClientRemoved
1138
c.use_dbus = False
1139
c.disable()
1140
# Emit D-Bus signal
1141
self.ClientRemoved(object_path, c.name)
1142
return
1143
raise KeyError
1144
1145
del _interface
1146
1147
mandos_server = MandosServer()
1148
1149
840
for client in clients:
1150
if use_dbus:
1151
# Emit D-Bus signal
1152
mandos_server.ClientAdded(client.dbus_object_path,
1153
client.GetAllProperties())
1154
client.enable()
1155
1156
tcp_server.enable()
1157
tcp_server.server_activate()
1158
841
client.start()
842
843
tcp_server = IPv6_TCPServer((server_settings["address"],
844
server_settings["port"]),
845
tcp_handler,
846
settings=server_settings,
847
clients=clients)
1159
848
# Find out what port we got
1160
849
service.port = tcp_server.socket.getsockname()[1]
1161
850
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1175
864
1176
865
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1177
866
lambda *args, **kwargs:
1178
(tcp_server.handle_request
1179
(*args[2:], **kwargs) or True))
867
tcp_server.handle_request\
868
(*args[2:], **kwargs) or True)
1180
869
1181
870
logger.debug(u"Starting main loop")
871
main_loop_started = True
1182
872
main_loop.run()
1183
873
except AvahiError, error:
1184
logger.critical(u"AvahiError: %s", error)
874
logger.critical(u"AvahiError: %s" + unicode(error))
1185
875
sys.exit(1)
1186
876
except KeyboardInterrupt:
1187
877
if debug:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0