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- Committer: Teddy Hogeborn
- Date: 2009-02-05 03:37:06 UTC
- Revision ID: teddy@fukt.bsnet.se-20090205033706-unwxpqdwzgv84lux
* plugin-runner.c (main): Bug fix: Do setgid before setuid.
- 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", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
13
13
# Everything else is
14
14
# Copyright © 2008,2009 Teddy Hogeborn
33
33
34
34
from __future__ import division, with_statement, absolute_import
35
35
36
import SocketServer as socketserver
36
import SocketServer
37
37
import socket
38
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 as configparser
47
import ConfigParser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
52
53
import subprocess
53
54
import atexit
54
55
import stat
56
57
import logging.handlers
57
58
import pwd
58
59
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
62
60
63
61
import dbus
64
62
import dbus.service
68
66
import ctypes
69
67
import ctypes.util
70
68
71
try:
72
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
73
except AttributeError:
74
try:
75
from IN import SO_BINDTODEVICE
76
except ImportError:
77
SO_BINDTODEVICE = None
78
79
80
version = "1.0.11"
81
82
logger = logging.Logger(u'mandos')
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
83
72
syslogger = (logging.handlers.SysLogHandler
84
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
85
74
address = "/dev/log"))
86
75
syslogger.setFormatter(logging.Formatter
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
u' %(message)s'))
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
89
78
logger.addHandler(syslogger)
90
79
91
80
console = logging.StreamHandler()
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
95
83
logger.addHandler(console)
96
84
97
85
class AvahiError(Exception):
110
98
111
99
class AvahiService(object):
112
100
"""An Avahi (Zeroconf) service.
113
114
101
Attributes:
115
102
interface: integer; avahi.IF_UNSPEC or an interface index.
116
103
Used to optionally bind to the specified interface.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
104
name: string; Example: 'Mandos'
105
type: string; Example: '_mandos._tcp'.
119
106
See <http://www.dns-sd.org/ServiceTypes.html>
120
107
port: integer; what port to announce
121
108
TXT: list of strings; TXT record for the service
124
111
max_renames: integer; maximum number of renames
125
112
rename_count: integer; counter so we only rename after collisions
126
113
a sensible number of times
127
group: D-Bus Entry Group
128
server: D-Bus Server
129
bus: dbus.SystemBus()
130
114
"""
131
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
132
116
servicetype = None, port = None, TXT = None,
133
domain = u"", host = u"", max_renames = 32768,
134
protocol = avahi.PROTO_UNSPEC, bus = None):
117
domain = "", host = "", max_renames = 32768):
135
118
self.interface = interface
136
119
self.name = name
137
120
self.type = servicetype
141
124
self.host = host
142
125
self.rename_count = 0
143
126
self.max_renames = max_renames
144
self.protocol = protocol
145
self.group = None # our entry group
146
self.server = None
147
self.bus = bus
148
127
def rename(self):
149
128
"""Derived from the Avahi example code"""
150
129
if self.rename_count >= self.max_renames:
152
131
u" after %i retries, exiting.",
153
132
self.rename_count)
154
133
raise AvahiServiceError(u"Too many renames")
155
self.name = self.server.GetAlternativeServiceName(self.name)
134
self.name = server.GetAlternativeServiceName(self.name)
156
135
logger.info(u"Changing Zeroconf service name to %r ...",
157
unicode(self.name))
136
str(self.name))
158
137
syslogger.setFormatter(logging.Formatter
159
(u'Mandos (%s) [%%(process)d]:'
160
u' %%(levelname)s: %%(message)s'
161
% self.name))
138
('Mandos (%s): %%(levelname)s:'
139
' %%(message)s' % self.name))
162
140
self.remove()
163
141
self.add()
164
142
self.rename_count += 1
165
143
def remove(self):
166
144
"""Derived from the Avahi example code"""
167
if self.group is not None:
168
self.group.Reset()
145
if group is not None:
146
group.Reset()
169
147
def add(self):
170
148
"""Derived from the Avahi example code"""
171
if self.group is None:
172
self.group = dbus.Interface(
173
self.bus.get_object(avahi.DBUS_NAME,
174
self.server.EntryGroupNew()),
175
avahi.DBUS_INTERFACE_ENTRY_GROUP)
176
self.group.connect_to_signal('StateChanged',
177
self.entry_group_state_changed)
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)
178
157
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
179
self.name, self.type)
180
self.group.AddService(
181
self.interface,
182
self.protocol,
183
dbus.UInt32(0), # flags
184
self.name, self.type,
185
self.domain, self.host,
186
dbus.UInt16(self.port),
187
avahi.string_array_to_txt_array(self.TXT))
188
self.group.Commit()
189
def entry_group_state_changed(self, state, error):
190
"""Derived from the Avahi example code"""
191
logger.debug(u"Avahi state change: %i", state)
192
193
if state == avahi.ENTRY_GROUP_ESTABLISHED:
194
logger.debug(u"Zeroconf service established.")
195
elif state == avahi.ENTRY_GROUP_COLLISION:
196
logger.warning(u"Zeroconf service name collision.")
197
self.rename()
198
elif state == avahi.ENTRY_GROUP_FAILURE:
199
logger.critical(u"Avahi: Error in group state changed %s",
200
unicode(error))
201
raise AvahiGroupError(u"State changed: %s"
202
% unicode(error))
203
def cleanup(self):
204
"""Derived from the Avahi example code"""
205
if self.group is not None:
206
self.group.Free()
207
self.group = None
208
def server_state_changed(self, state):
209
"""Derived from the Avahi example code"""
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
212
self.remove()
213
elif state == avahi.SERVER_RUNNING:
214
self.add()
215
def activate(self):
216
"""Derived from the Avahi example code"""
217
if self.server is None:
218
self.server = dbus.Interface(
219
self.bus.get_object(avahi.DBUS_NAME,
220
avahi.DBUS_PATH_SERVER),
221
avahi.DBUS_INTERFACE_SERVER)
222
self.server.connect_to_signal(u"StateChanged",
223
self.server_state_changed)
224
self.server_state_changed(self.server.GetState())
225
226
227
class Client(object):
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):
228
180
"""A representation of a client host served by this server.
229
230
181
Attributes:
231
182
name: string; from the config file, used in log messages and
232
183
D-Bus identifiers
252
203
client lives. %() expansions are done at
253
204
runtime with vars(self) as dict, so that for
254
205
instance %(name)s can be used in the command.
255
current_checker_command: string; current running checker_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
256
208
"""
257
258
@staticmethod
259
def _datetime_to_milliseconds(dt):
260
"Convert a datetime.datetime() to milliseconds"
261
return ((dt.days * 24 * 60 * 60 * 1000)
262
+ (dt.seconds * 1000)
263
+ (dt.microseconds // 1000))
264
265
209
def timeout_milliseconds(self):
266
210
"Return the 'timeout' attribute in milliseconds"
267
return self._datetime_to_milliseconds(self.timeout)
211
return ((self.timeout.days * 24 * 60 * 60 * 1000)
212
+ (self.timeout.seconds * 1000)
213
+ (self.timeout.microseconds // 1000))
268
214
269
215
def interval_milliseconds(self):
270
216
"Return the 'interval' attribute in milliseconds"
271
return self._datetime_to_milliseconds(self.interval)
217
return ((self.interval.days * 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds * 1000)
219
+ (self.interval.microseconds // 1000))
272
220
273
def __init__(self, name = None, disable_hook=None, config=None):
221
def __init__(self, name = None, disable_hook=None, config=None,
222
use_dbus=True):
274
223
"""Note: the 'checker' key in 'config' sets the
275
224
'checker_command' attribute and *not* the 'checker'
276
225
attribute."""
278
227
if config is None:
279
228
config = {}
280
229
logger.debug(u"Creating client %r", self.name)
230
self.use_dbus = False # During __init__
281
231
# Uppercase and remove spaces from fingerprint for later
282
232
# comparison purposes with return value from the fingerprint()
283
233
# function
284
self.fingerprint = (config[u"fingerprint"].upper()
234
self.fingerprint = (config["fingerprint"].upper()
285
235
.replace(u" ", u""))
286
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
287
if u"secret" in config:
288
self.secret = config[u"secret"].decode(u"base64")
289
elif u"secfile" in config:
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
290
240
with closing(open(os.path.expanduser
291
241
(os.path.expandvars
292
(config[u"secfile"])))) as secfile:
242
(config["secfile"])))) as secfile:
293
243
self.secret = secfile.read()
294
244
else:
295
245
raise TypeError(u"No secret or secfile for client %s"
296
246
% self.name)
297
self.host = config.get(u"host", u"")
247
self.host = config.get("host", "")
298
248
self.created = datetime.datetime.utcnow()
299
249
self.enabled = False
300
250
self.last_enabled = None
301
251
self.last_checked_ok = None
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
304
254
self.disable_hook = disable_hook
305
255
self.checker = None
306
256
self.checker_initiator_tag = None
307
257
self.disable_initiator_tag = None
308
258
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
310
self.current_checker_command = None
259
self.checker_command = config["checker"]
311
260
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)
312
270
313
271
def enable(self):
314
272
"""Start this client's checker and timeout hooks"""
315
if getattr(self, u"enabled", False):
316
# Already enabled
317
return
318
273
self.last_enabled = datetime.datetime.utcnow()
319
274
# Schedule a new checker to be started an 'interval' from now,
320
275
# and every interval from then on.
328
283
(self.timeout_milliseconds(),
329
284
self.disable))
330
285
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)))
331
293
332
294
def disable(self):
333
295
"""Disable this client."""
334
296
if not getattr(self, "enabled", False):
335
297
return False
336
298
logger.info(u"Disabling client %s", self.name)
337
if getattr(self, u"disable_initiator_tag", False):
299
if getattr(self, "disable_initiator_tag", False):
338
300
gobject.source_remove(self.disable_initiator_tag)
339
301
self.disable_initiator_tag = None
340
if getattr(self, u"checker_initiator_tag", False):
302
if getattr(self, "checker_initiator_tag", False):
341
303
gobject.source_remove(self.checker_initiator_tag)
342
304
self.checker_initiator_tag = None
343
305
self.stop_checker()
344
306
if self.disable_hook:
345
307
self.disable_hook(self)
346
308
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))
347
313
# Do not run this again if called by a gobject.timeout_add
348
314
return False
349
315
355
321
"""The checker has completed, so take appropriate actions."""
356
322
self.checker_callback_tag = None
357
323
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))
358
328
if os.WIFEXITED(condition):
359
329
exitstatus = os.WEXITSTATUS(condition)
360
330
if exitstatus == 0:
364
334
else:
365
335
logger.info(u"Checker for %(name)s failed",
366
336
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))
367
342
else:
368
343
logger.warning(u"Checker for %(name)s crashed?",
369
344
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))
370
350
371
351
def checked_ok(self):
372
352
"""Bump up the timeout for this client.
373
374
353
This should only be called when the client has been seen,
375
354
alive and well.
376
355
"""
379
358
self.disable_initiator_tag = (gobject.timeout_add
380
359
(self.timeout_milliseconds(),
381
360
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)))
382
367
383
368
def start_checker(self):
384
369
"""Start a new checker subprocess if one is not running.
385
386
370
If a checker already exists, leave it running and do
387
371
nothing."""
388
372
# The reason for not killing a running checker is that if we
393
377
# checkers alone, the checker would have to take more time
394
378
# than 'timeout' for the client to be declared invalid, which
395
379
# 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
406
380
if self.checker is None:
407
381
try:
408
382
# In case checker_command has exactly one % operator
409
383
command = self.checker_command % self.host
410
384
except TypeError:
411
385
# Escape attributes for the shell
412
escaped_attrs = dict((key,
413
re.escape(unicode(str(val),
414
errors=
415
u'replace')))
386
escaped_attrs = dict((key, re.escape(str(val)))
416
387
for key, val in
417
388
vars(self).iteritems())
418
389
try:
421
392
logger.error(u'Could not format string "%s":'
422
393
u' %s', self.checker_command, error)
423
394
return True # Try again later
424
self.current_checker_command = command
425
395
try:
426
396
logger.info(u"Starting checker %r for %s",
427
397
command, self.name)
431
401
# always replaced by /dev/null.)
432
402
self.checker = subprocess.Popen(command,
433
403
close_fds=True,
434
shell=True, cwd=u"/")
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))
435
411
self.checker_callback_tag = (gobject.child_watch_add
436
412
(self.checker.pid,
437
413
self.checker_callback,
438
414
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)
445
415
except OSError, error:
446
416
logger.error(u"Failed to start subprocess: %s",
447
417
error)
453
423
if self.checker_callback_tag:
454
424
gobject.source_remove(self.checker_callback_tag)
455
425
self.checker_callback_tag = None
456
if getattr(self, u"checker", None) is None:
426
if getattr(self, "checker", None) is None:
457
427
return
458
428
logger.debug(u"Stopping checker for %(name)s", vars(self))
459
429
try:
465
435
if error.errno != errno.ESRCH: # No such process
466
436
raise
467
437
self.checker = None
438
if self.use_dbus:
439
self.PropertyChanged(dbus.String(u"checker_running"),
440
dbus.Boolean(False, variant_level=1))
468
441
469
442
def still_valid(self):
470
443
"""Has the timeout not yet passed for this client?"""
471
if not getattr(self, u"enabled", False):
444
if not getattr(self, "enabled", False):
472
445
return False
473
446
now = datetime.datetime.utcnow()
474
447
if self.last_checked_ok is None:
475
448
return now < (self.created + self.timeout)
476
449
else:
477
450
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
593
451
594
452
## D-Bus methods & signals
595
453
_interface = u"se.bsnet.fukt.Mandos.Client"
596
454
597
455
# CheckedOK - method
598
@dbus.service.method(_interface)
599
def CheckedOK(self):
600
return self.checked_ok()
456
CheckedOK = dbus.service.method(_interface)(checked_ok)
457
CheckedOK.__name__ = "CheckedOK"
601
458
602
459
# CheckerCompleted - signal
603
@dbus.service.signal(_interface, signature=u"nxs")
460
@dbus.service.signal(_interface, signature="nxs")
604
461
def CheckerCompleted(self, exitcode, waitstatus, command):
605
462
"D-Bus signal"
606
463
pass
607
464
608
465
# CheckerStarted - signal
609
@dbus.service.signal(_interface, signature=u"s")
466
@dbus.service.signal(_interface, signature="s")
610
467
def CheckerStarted(self, command):
611
468
"D-Bus signal"
612
469
pass
613
470
614
471
# GetAllProperties - method
615
@dbus.service.method(_interface, out_signature=u"a{sv}")
472
@dbus.service.method(_interface, out_signature="a{sv}")
616
473
def GetAllProperties(self):
617
474
"D-Bus method"
618
475
return dbus.Dictionary({
619
dbus.String(u"name"):
476
dbus.String("name"):
620
477
dbus.String(self.name, variant_level=1),
621
dbus.String(u"fingerprint"):
478
dbus.String("fingerprint"):
622
479
dbus.String(self.fingerprint, variant_level=1),
623
dbus.String(u"host"):
480
dbus.String("host"):
624
481
dbus.String(self.host, 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)
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)
631
487
if self.last_enabled is not None
632
488
else dbus.Boolean(False, variant_level=1)),
633
dbus.String(u"enabled"):
489
dbus.String("enabled"):
634
490
dbus.Boolean(self.enabled, variant_level=1),
635
dbus.String(u"last_checked_ok"):
636
(self._datetime_to_dbus(self.last_checked_ok,
637
variant_level=1)
491
dbus.String("last_checked_ok"):
492
(_datetime_to_dbus(self.last_checked_ok,
493
variant_level=1)
638
494
if self.last_checked_ok is not None
639
495
else dbus.Boolean (False, variant_level=1)),
640
dbus.String(u"timeout"):
496
dbus.String("timeout"):
641
497
dbus.UInt64(self.timeout_milliseconds(),
642
498
variant_level=1),
643
dbus.String(u"interval"):
499
dbus.String("interval"):
644
500
dbus.UInt64(self.interval_milliseconds(),
645
501
variant_level=1),
646
dbus.String(u"checker"):
502
dbus.String("checker"):
647
503
dbus.String(self.checker_command,
648
504
variant_level=1),
649
dbus.String(u"checker_running"):
505
dbus.String("checker_running"):
650
506
dbus.Boolean(self.checker is not None,
651
507
variant_level=1),
652
dbus.String(u"object_path"):
508
dbus.String("object_path"):
653
509
dbus.ObjectPath(self.dbus_object_path,
654
510
variant_level=1)
655
}, signature=u"sv")
511
}, signature="sv")
656
512
657
513
# IsStillValid - method
658
@dbus.service.method(_interface, out_signature=u"b")
659
def IsStillValid(self):
660
return self.still_valid()
514
IsStillValid = (dbus.service.method(_interface, out_signature="b")
515
(still_valid))
516
IsStillValid.__name__ = "IsStillValid"
661
517
662
518
# PropertyChanged - signal
663
@dbus.service.signal(_interface, signature=u"sv")
519
@dbus.service.signal(_interface, signature="sv")
664
520
def PropertyChanged(self, property, value):
665
521
"D-Bus signal"
666
522
pass
667
523
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
680
524
# SetChecker - method
681
@dbus.service.method(_interface, in_signature=u"s")
525
@dbus.service.method(_interface, in_signature="s")
682
526
def SetChecker(self, checker):
683
527
"D-Bus setter method"
684
528
self.checker_command = checker
688
532
variant_level=1))
689
533
690
534
# SetHost - method
691
@dbus.service.method(_interface, in_signature=u"s")
535
@dbus.service.method(_interface, in_signature="s")
692
536
def SetHost(self, host):
693
537
"D-Bus setter method"
694
538
self.host = host
697
541
dbus.String(self.host, variant_level=1))
698
542
699
543
# SetInterval - method
700
@dbus.service.method(_interface, in_signature=u"t")
544
@dbus.service.method(_interface, in_signature="t")
701
545
def SetInterval(self, milliseconds):
702
546
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
703
547
# Emit D-Bus signal
706
550
variant_level=1)))
707
551
708
552
# SetSecret - method
709
@dbus.service.method(_interface, in_signature=u"ay",
553
@dbus.service.method(_interface, in_signature="ay",
710
554
byte_arrays=True)
711
555
def SetSecret(self, secret):
712
556
"D-Bus setter method"
713
557
self.secret = str(secret)
714
558
715
559
# SetTimeout - method
716
@dbus.service.method(_interface, in_signature=u"t")
560
@dbus.service.method(_interface, in_signature="t")
717
561
def SetTimeout(self, milliseconds):
718
562
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
719
563
# Emit D-Bus signal
722
566
variant_level=1)))
723
567
724
568
# Enable - method
725
@dbus.service.method(_interface)
726
def Enable(self):
727
"D-Bus method"
728
self.enable()
569
Enable = dbus.service.method(_interface)(enable)
570
Enable.__name__ = "Enable"
729
571
730
572
# StartChecker - method
731
573
@dbus.service.method(_interface)
740
582
self.disable()
741
583
742
584
# StopChecker - method
743
@dbus.service.method(_interface)
744
def StopChecker(self):
745
self.stop_checker()
585
StopChecker = dbus.service.method(_interface)(stop_checker)
586
StopChecker.__name__ = "StopChecker"
746
587
747
588
del _interface
748
589
749
590
750
class ClientHandler(socketserver.BaseRequestHandler, object):
751
"""A class to handle client connections.
752
753
Instantiated once for each connection to handle it.
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.
754
655
Note: This will run in its own forked process."""
755
656
756
657
def handle(self):
757
658
logger.info(u"TCP connection from: %s",
758
659
unicode(self.client_address))
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
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.
920
736
Attributes:
737
settings: Server settings
738
clients: Set() of Client objects
921
739
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
924
740
"""
925
def __init__(self, server_address, RequestHandlerClass,
926
interface=None, use_ipv6=True):
927
self.interface = interface
928
if use_ipv6:
929
self.address_family = socket.AF_INET6
930
socketserver.TCPServer.__init__(self, server_address,
931
RequestHandlerClass)
741
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)
932
751
def server_bind(self):
933
752
"""This overrides the normal server_bind() function
934
753
to bind to an interface if one was specified, and also NOT to
935
754
bind to an address or port if they were not specified."""
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
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
958
769
# Only bind(2) the socket if we really need to.
959
770
if self.server_address[0] or self.server_address[1]:
960
771
if not self.server_address[0]:
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,
772
in6addr_any = "::"
773
self.server_address = (in6addr_any,
966
774
self.server_address[1])
967
775
elif not self.server_address[1]:
968
776
self.server_address = (self.server_address[0],
969
777
0)
970
# if self.interface:
778
# if self.settings["interface"]:
971
779
# self.server_address = (self.server_address[0],
972
780
# 0, # port
973
781
# 0, # flowinfo
974
782
# if_nametoindex
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)
783
# (self.settings
784
# ["interface"]))
785
return super(IPv6_TCPServer, self).server_bind()
1005
786
def server_activate(self):
1006
787
if self.enabled:
1007
return socketserver.TCPServer.server_activate(self)
788
return super(IPv6_TCPServer, self).server_activate()
1008
789
def enable(self):
1009
790
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
1084
791
1085
792
1086
793
def string_to_delta(interval):
1087
794
"""Parse a string and return a datetime.timedelta
1088
795
1089
>>> string_to_delta(u'7d')
796
>>> string_to_delta('7d')
1090
797
datetime.timedelta(7)
1091
>>> string_to_delta(u'60s')
798
>>> string_to_delta('60s')
1092
799
datetime.timedelta(0, 60)
1093
>>> string_to_delta(u'60m')
800
>>> string_to_delta('60m')
1094
801
datetime.timedelta(0, 3600)
1095
>>> string_to_delta(u'24h')
802
>>> string_to_delta('24h')
1096
803
datetime.timedelta(1)
1097
804
>>> string_to_delta(u'1w')
1098
805
datetime.timedelta(7)
1099
>>> string_to_delta(u'5m 30s')
806
>>> string_to_delta('5m 30s')
1100
807
datetime.timedelta(0, 330)
1101
808
"""
1102
809
timevalue = datetime.timedelta(0)
1122
829
return timevalue
1123
830
1124
831
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
1125
855
def if_nametoindex(interface):
1126
"""Call the C function if_nametoindex(), or equivalent
1127
1128
Note: This function cannot accept a unicode string."""
856
"""Call the C function if_nametoindex(), or equivalent"""
1129
857
global if_nametoindex
1130
858
try:
1131
859
if_nametoindex = (ctypes.cdll.LoadLibrary
1132
(ctypes.util.find_library(u"c"))
860
(ctypes.util.find_library("c"))
1133
861
.if_nametoindex)
1134
862
except (OSError, AttributeError):
1135
logger.warning(u"Doing if_nametoindex the hard way")
863
if "struct" not in sys.modules:
864
import struct
865
if "fcntl" not in sys.modules:
866
import fcntl
1136
867
def if_nametoindex(interface):
1137
868
"Get an interface index the hard way, i.e. using fcntl()"
1138
869
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1139
870
with closing(socket.socket()) as s:
1140
871
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1141
struct.pack(str(u"16s16x"),
1142
interface))
1143
interface_index = struct.unpack(str(u"I"),
1144
ifreq[16:20])[0]
872
struct.pack("16s16x", interface))
873
interface_index = struct.unpack("I", ifreq[16:20])[0]
1145
874
return interface_index
1146
875
return if_nametoindex(interface)
1147
876
1148
877
1149
878
def daemon(nochdir = False, noclose = False):
1150
879
"""See daemon(3). Standard BSD Unix function.
1151
1152
880
This should really exist as os.daemon, but it doesn't (yet)."""
1153
881
if os.fork():
1154
882
sys.exit()
1155
883
os.setsid()
1156
884
if not nochdir:
1157
os.chdir(u"/")
885
os.chdir("/")
1158
886
if os.fork():
1159
887
sys.exit()
1160
888
if not noclose:
1162
890
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1163
891
if not stat.S_ISCHR(os.fstat(null).st_mode):
1164
892
raise OSError(errno.ENODEV,
1165
u"/dev/null not a character device")
893
"/dev/null not a character device")
1166
894
os.dup2(null, sys.stdin.fileno())
1167
895
os.dup2(null, sys.stdout.fileno())
1168
896
os.dup2(null, sys.stderr.fileno())
1171
899
1172
900
1173
901
def main():
1174
1175
######################################################################
1176
# Parsing of options, both command line and config file
1177
1178
902
parser = optparse.OptionParser(version = "%%prog %s" % version)
1179
parser.add_option("-i", u"--interface", type=u"string",
1180
metavar="IF", help=u"Bind to interface IF")
1181
parser.add_option("-a", u"--address", type=u"string",
1182
help=u"Address to listen for requests on")
1183
parser.add_option("-p", u"--port", type=u"int",
1184
help=u"Port number to receive requests on")
1185
parser.add_option("--check", action=u"store_true",
1186
help=u"Run self-test")
1187
parser.add_option("--debug", action=u"store_true",
1188
help=u"Debug mode; run in foreground and log to"
1189
u" terminal")
1190
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1191
u" priority string (see GnuTLS documentation)")
1192
parser.add_option("--servicename", type=u"string",
1193
metavar=u"NAME", help=u"Zeroconf service name")
1194
parser.add_option("--configdir", type=u"string",
1195
default=u"/etc/mandos", metavar=u"DIR",
1196
help=u"Directory to search for configuration"
1197
u" files")
1198
parser.add_option("--no-dbus", action=u"store_false",
1199
dest=u"use_dbus", help=u"Do not provide D-Bus"
1200
u" system bus interface")
1201
parser.add_option("--no-ipv6", action=u"store_false",
1202
dest=u"use_ipv6", help=u"Do not use IPv6")
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")
1203
926
options = parser.parse_args()[0]
1204
927
1205
928
if options.check:
1208
931
sys.exit()
1209
932
1210
933
# Default values for config file for server-global settings
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",
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",
1220
942
}
1221
943
1222
944
# Parse config file for server-global settings
1223
server_config = configparser.SafeConfigParser(server_defaults)
945
server_config = ConfigParser.SafeConfigParser(server_defaults)
1224
946
del server_defaults
1225
server_config.read(os.path.join(options.configdir,
1226
u"mandos.conf"))
947
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1227
948
# Convert the SafeConfigParser object to a dict
1228
949
server_settings = server_config.defaults()
1229
950
# Use the appropriate methods on the non-string config options
1230
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1231
server_settings[option] = server_config.getboolean(u"DEFAULT",
1232
option)
951
server_settings["debug"] = server_config.getboolean("DEFAULT",
952
"debug")
953
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
954
"use_dbus")
1233
955
if server_settings["port"]:
1234
server_settings["port"] = server_config.getint(u"DEFAULT",
1235
u"port")
956
server_settings["port"] = server_config.getint("DEFAULT",
957
"port")
1236
958
del server_config
1237
959
1238
960
# Override the settings from the config file with command line
1239
961
# options, if set.
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"):
962
for option in ("interface", "address", "port", "debug",
963
"priority", "servicename", "configdir",
964
"use_dbus"):
1243
965
value = getattr(options, option)
1244
966
if value is not None:
1245
967
server_settings[option] = value
1246
968
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])
1251
969
# Now we have our good server settings in "server_settings"
1252
970
1253
##################################################################
1254
1255
971
# For convenience
1256
debug = server_settings[u"debug"]
1257
use_dbus = server_settings[u"use_dbus"]
1258
use_ipv6 = server_settings[u"use_ipv6"]
972
debug = server_settings["debug"]
973
use_dbus = server_settings["use_dbus"]
1259
974
1260
975
if not debug:
1261
976
syslogger.setLevel(logging.WARNING)
1262
977
console.setLevel(logging.WARNING)
1263
978
1264
if server_settings[u"servicename"] != u"Mandos":
979
if server_settings["servicename"] != "Mandos":
1265
980
syslogger.setFormatter(logging.Formatter
1266
(u'Mandos (%s) [%%(process)d]:'
1267
u' %%(levelname)s: %%(message)s'
1268
% server_settings[u"servicename"]))
981
('Mandos (%s): %%(levelname)s:'
982
' %%(message)s'
983
% server_settings["servicename"]))
1269
984
1270
985
# Parse config file with clients
1271
client_defaults = { u"timeout": u"1h",
1272
u"interval": u"5m",
1273
u"checker": u"fping -q -- %%(host)s",
1274
u"host": u"",
986
client_defaults = { "timeout": "1h",
987
"interval": "5m",
988
"checker": "fping -q -- %%(host)s",
989
"host": "",
1275
990
}
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"
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"
1292
1002
try:
1293
pidfile = open(pidfilename, u"w")
1003
pidfile = open(pidfilename, "w")
1294
1004
except IOError:
1295
logger.error(u"Could not open file %r", pidfilename)
1005
logger.error("Could not open file %r", pidfilename)
1296
1006
1297
1007
try:
1298
uid = pwd.getpwnam(u"_mandos").pw_uid
1299
gid = pwd.getpwnam(u"_mandos").pw_gid
1008
uid = pwd.getpwnam("_mandos").pw_uid
1009
gid = pwd.getpwnam("_mandos").pw_gid
1300
1010
except KeyError:
1301
1011
try:
1302
uid = pwd.getpwnam(u"mandos").pw_uid
1303
gid = pwd.getpwnam(u"mandos").pw_gid
1012
uid = pwd.getpwnam("mandos").pw_uid
1013
gid = pwd.getpwnam("mandos").pw_gid
1304
1014
except KeyError:
1305
1015
try:
1306
uid = pwd.getpwnam(u"nobody").pw_uid
1307
gid = pwd.getpwnam(u"nobody").pw_gid
1016
uid = pwd.getpwnam("nobody").pw_uid
1017
gid = pwd.getpwnam("nogroup").pw_gid
1308
1018
except KeyError:
1309
1019
uid = 65534
1310
1020
gid = 65534
1323
1033
1324
1034
@gnutls.library.types.gnutls_log_func
1325
1035
def debug_gnutls(level, string):
1326
logger.debug(u"GnuTLS: %s", string[:-1])
1036
logger.debug("GnuTLS: %s", string[:-1])
1327
1037
1328
1038
(gnutls.library.functions
1329
1039
.gnutls_global_set_log_function(debug_gnutls))
1330
1040
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
1331
1048
global main_loop
1049
global bus
1050
global server
1332
1051
# From the Avahi example code
1333
1052
DBusGMainLoop(set_as_default=True )
1334
1053
main_loop = gobject.MainLoop()
1335
1054
bus = dbus.SystemBus()
1055
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1056
avahi.DBUS_PATH_SERVER),
1057
avahi.DBUS_INTERFACE_SERVER)
1336
1058
# End of Avahi example code
1337
1059
if use_dbus:
1338
1060
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"])))
1346
1061
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:
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:
1355
1068
logger.warning(u"No clients defined")
1356
1069
1357
1070
if debug:
1367
1080
daemon()
1368
1081
1369
1082
try:
1370
with closing(pidfile):
1371
pid = os.getpid()
1372
pidfile.write(str(pid) + "\n")
1083
pid = os.getpid()
1084
pidfile.write(str(pid) + "\n")
1085
pidfile.close()
1373
1086
del pidfile
1374
1087
except IOError:
1375
1088
logger.error(u"Could not write to file %r with PID %d",
1381
1094
1382
1095
def cleanup():
1383
1096
"Cleanup function; run on exit"
1384
service.cleanup()
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
1385
1103
1386
while tcp_server.clients:
1387
client = tcp_server.clients.pop()
1104
while clients:
1105
client = clients.pop()
1388
1106
client.disable_hook = None
1389
1107
client.disable()
1390
1108
1396
1114
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1397
1115
1398
1116
if use_dbus:
1399
class MandosDBusService(dbus.service.Object):
1117
class MandosServer(dbus.service.Object):
1400
1118
"""A D-Bus proxy object"""
1401
1119
def __init__(self):
1402
dbus.service.Object.__init__(self, bus, u"/")
1120
dbus.service.Object.__init__(self, bus, "/")
1403
1121
_interface = u"se.bsnet.fukt.Mandos"
1404
1122
1405
@dbus.service.signal(_interface, signature=u"oa{sv}")
1123
@dbus.service.signal(_interface, signature="oa{sv}")
1406
1124
def ClientAdded(self, objpath, properties):
1407
1125
"D-Bus signal"
1408
1126
pass
1409
1127
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")
1128
@dbus.service.signal(_interface, signature="os")
1416
1129
def ClientRemoved(self, objpath, name):
1417
1130
"D-Bus signal"
1418
1131
pass
1419
1132
1420
@dbus.service.method(_interface, out_signature=u"ao")
1133
@dbus.service.method(_interface, out_signature="ao")
1421
1134
def GetAllClients(self):
1422
1135
"D-Bus method"
1423
return dbus.Array(c.dbus_object_path
1424
for c in tcp_server.clients)
1136
return dbus.Array(c.dbus_object_path for c in clients)
1425
1137
1426
@dbus.service.method(_interface,
1427
out_signature=u"a{oa{sv}}")
1138
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1428
1139
def GetAllClientsWithProperties(self):
1429
1140
"D-Bus method"
1430
1141
return dbus.Dictionary(
1431
1142
((c.dbus_object_path, c.GetAllProperties())
1432
for c in tcp_server.clients),
1433
signature=u"oa{sv}")
1143
for c in clients),
1144
signature="oa{sv}")
1434
1145
1435
@dbus.service.method(_interface, in_signature=u"o")
1146
@dbus.service.method(_interface, in_signature="o")
1436
1147
def RemoveClient(self, object_path):
1437
1148
"D-Bus method"
1438
for c in tcp_server.clients:
1149
for c in clients:
1439
1150
if c.dbus_object_path == object_path:
1440
tcp_server.clients.remove(c)
1441
c.remove_from_connection()
1151
clients.remove(c)
1442
1152
# Don't signal anything except ClientRemoved
1443
c.disable(signal=False)
1153
c.use_dbus = False
1154
c.disable()
1444
1155
# Emit D-Bus signal
1445
1156
self.ClientRemoved(object_path, c.name)
1446
1157
return
1448
1159
1449
1160
del _interface
1450
1161
1451
mandos_dbus_service = MandosDBusService()
1162
mandos_server = MandosServer()
1452
1163
1453
for client in tcp_server.clients:
1164
for client in clients:
1454
1165
if use_dbus:
1455
1166
# Emit D-Bus signal
1456
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1457
client.GetAllProperties())
1167
mandos_server.ClientAdded(client.dbus_object_path,
1168
client.GetAllProperties())
1458
1169
client.enable()
1459
1170
1460
1171
tcp_server.enable()
1462
1173
1463
1174
# Find out what port we got
1464
1175
service.port = tcp_server.socket.getsockname()[1]
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())
1176
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1177
u" scope_id %d" % tcp_server.socket.getsockname())
1472
1178
1473
1179
#service.interface = tcp_server.socket.getsockname()[3]
1474
1180
1475
1181
try:
1476
1182
# From the Avahi example code
1183
server.connect_to_signal("StateChanged", server_state_changed)
1477
1184
try:
1478
service.activate()
1185
server_state_changed(server.GetState())
1479
1186
except dbus.exceptions.DBusException, error:
1480
1187
logger.critical(u"DBusException: %s", error)
1481
1188
sys.exit(1)
1494
1201
except KeyboardInterrupt:
1495
1202
if debug:
1496
1203
print >> sys.stderr
1497
logger.debug(u"Server received KeyboardInterrupt")
1498
logger.debug(u"Server exiting")
1204
logger.debug("Server received KeyboardInterrupt")
1205
logger.debug("Server exiting")
1499
1206
1500
1207
if __name__ == '__main__':
1501
1208
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0