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- Committer: Teddy Hogeborn
- Date: 2009-04-17 01:16:37 UTC
- Revision ID: teddy@fukt.bsnet.se-20090417011637-bcqjpm7fskm4370v
Code cleanup and one bug fix.
* mandos (Client.enable): Bug fix: Do not enable if already enabled.
(MandosServer.__init__): Create empty set of clients if none passed.
(main): Do not create clients set; do not pass a clients set to
MandosServer. Use tcp_server.clients throughout.
* mandos (Client.enable): Bug fix: Do not enable if already enabled.
(MandosServer.__init__): Create empty set of clients if none passed.
(main): Do not create clients set; do not pass a clients set to
MandosServer. Use tcp_server.clients throughout.
- files modified:
- INSTALL
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
14
# Copyright © 2008,2009 Teddy Hogeborn
33
33
34
34
from __future__ import division, with_statement, absolute_import
35
35
36
import SocketServer
36
import SocketServer as socketserver
37
37
import socket
38
38
import optparse
39
39
import datetime
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
import ConfigParser
47
import ConfigParser as configparser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
53
52
import subprocess
54
53
import atexit
55
54
import stat
57
56
import logging.handlers
58
57
import pwd
59
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
60
62
61
63
import dbus
62
64
import dbus.service
66
68
import ctypes
67
69
import ctypes.util
68
70
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
71
try:
72
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
73
except AttributeError:
74
try:
75
from IN import SO_BINDTODEVICE
76
except ImportError:
77
SO_BINDTODEVICE = None
78
79
80
version = "1.0.8"
81
82
logger = logging.Logger(u'mandos')
72
83
syslogger = (logging.handlers.SysLogHandler
73
84
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
85
address = "/dev/log"))
75
86
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
u' %(message)s'))
77
89
logger.addHandler(syslogger)
78
90
79
91
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
82
95
logger.addHandler(console)
83
96
84
97
class AvahiError(Exception):
97
110
98
111
class AvahiService(object):
99
112
"""An Avahi (Zeroconf) service.
113
100
114
Attributes:
101
115
interface: integer; avahi.IF_UNSPEC or an interface index.
102
116
Used to optionally bind to the specified interface.
103
name: string; Example: 'Mandos'
104
type: string; Example: '_mandos._tcp'.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
105
119
See <http://www.dns-sd.org/ServiceTypes.html>
106
120
port: integer; what port to announce
107
121
TXT: list of strings; TXT record for the service
110
124
max_renames: integer; maximum number of renames
111
125
rename_count: integer; counter so we only rename after collisions
112
126
a sensible number of times
127
group: D-Bus Entry Group
128
server: D-Bus Server
129
bus: dbus.SystemBus()
113
130
"""
114
131
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
132
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
133
domain = u"", host = u"", max_renames = 32768,
134
protocol = avahi.PROTO_UNSPEC, bus = None):
117
135
self.interface = interface
118
136
self.name = name
119
137
self.type = servicetype
123
141
self.host = host
124
142
self.rename_count = 0
125
143
self.max_renames = max_renames
144
self.protocol = protocol
145
self.group = None # our entry group
146
self.server = None
147
self.bus = bus
126
148
def rename(self):
127
149
"""Derived from the Avahi example code"""
128
150
if self.rename_count >= self.max_renames:
130
152
u" after %i retries, exiting.",
131
153
self.rename_count)
132
154
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
155
self.name = self.server.GetAlternativeServiceName(self.name)
134
156
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
157
unicode(self.name))
136
158
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
159
(u'Mandos (%s) [%%(process)d]:'
160
u' %%(levelname)s: %%(message)s'
161
% self.name))
139
162
self.remove()
140
163
self.add()
141
164
self.rename_count += 1
142
165
def remove(self):
143
166
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
167
if self.group is not None:
168
self.group.Reset()
146
169
def add(self):
147
170
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
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)
156
178
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
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):
179
228
"""A representation of a client host served by this server.
229
180
230
Attributes:
181
231
name: string; from the config file, used in log messages and
182
232
D-Bus identifiers
202
252
client lives. %() expansions are done at
203
253
runtime with vars(self) as dict, so that for
204
254
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
255
current_checker_command: string; current running checker_command
207
256
"""
257
258
@staticmethod
259
def _datetime_to_milliseconds(dt):
260
"Convert a datetime.datetime() to milliseconds"
261
return ((dt.days * 24 * 60 * 60 * 1000)
262
+ (dt.seconds * 1000)
263
+ (dt.microseconds // 1000))
264
208
265
def timeout_milliseconds(self):
209
266
"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))
267
return self._datetime_to_milliseconds(self.timeout)
213
268
214
269
def interval_milliseconds(self):
215
270
"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))
271
return self._datetime_to_milliseconds(self.interval)
219
272
220
def __init__(self, name = None, disable_hook=None, config=None,
221
use_dbus=True):
273
def __init__(self, name = None, disable_hook=None, config=None):
222
274
"""Note: the 'checker' key in 'config' sets the
223
275
'checker_command' attribute and *not* the 'checker'
224
276
attribute."""
226
278
if config is None:
227
279
config = {}
228
280
logger.debug(u"Creating client %r", self.name)
229
self.use_dbus = False # During __init__
230
281
# Uppercase and remove spaces from fingerprint for later
231
282
# comparison purposes with return value from the fingerprint()
232
283
# function
233
self.fingerprint = (config["fingerprint"].upper()
284
self.fingerprint = (config[u"fingerprint"].upper()
234
285
.replace(u" ", u""))
235
286
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
238
elif "secfile" in config:
287
if u"secret" in config:
288
self.secret = config[u"secret"].decode(u"base64")
289
elif u"secfile" in config:
239
290
with closing(open(os.path.expanduser
240
291
(os.path.expandvars
241
(config["secfile"])))) as secfile:
292
(config[u"secfile"])))) as secfile:
242
293
self.secret = secfile.read()
243
294
else:
244
295
raise TypeError(u"No secret or secfile for client %s"
245
296
% self.name)
246
self.host = config.get("host", "")
297
self.host = config.get(u"host", u"")
247
298
self.created = datetime.datetime.utcnow()
248
299
self.enabled = False
249
300
self.last_enabled = None
250
301
self.last_checked_ok = None
251
self.timeout = string_to_delta(config["timeout"])
252
self.interval = string_to_delta(config["interval"])
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
253
304
self.disable_hook = disable_hook
254
305
self.checker = None
255
306
self.checker_initiator_tag = None
256
307
self.disable_initiator_tag = None
257
308
self.checker_callback_tag = None
258
self.checker_command = config["checker"]
309
self.checker_command = config[u"checker"]
310
self.current_checker_command = None
259
311
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
312
270
313
def enable(self):
271
314
"""Start this client's checker and timeout hooks"""
315
if getattr(self, u"enabled", False):
316
# Already enabled
317
return
272
318
self.last_enabled = datetime.datetime.utcnow()
273
319
# Schedule a new checker to be started an 'interval' from now,
274
320
# and every interval from then on.
282
328
(self.timeout_milliseconds(),
283
329
self.disable))
284
330
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
331
293
332
def disable(self):
294
333
"""Disable this client."""
295
334
if not getattr(self, "enabled", False):
296
335
return False
297
336
logger.info(u"Disabling client %s", self.name)
298
if getattr(self, "disable_initiator_tag", False):
337
if getattr(self, u"disable_initiator_tag", False):
299
338
gobject.source_remove(self.disable_initiator_tag)
300
339
self.disable_initiator_tag = None
301
if getattr(self, "checker_initiator_tag", False):
340
if getattr(self, u"checker_initiator_tag", False):
302
341
gobject.source_remove(self.checker_initiator_tag)
303
342
self.checker_initiator_tag = None
304
343
self.stop_checker()
305
344
if self.disable_hook:
306
345
self.disable_hook(self)
307
346
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))
312
347
# Do not run this again if called by a gobject.timeout_add
313
348
return False
314
349
320
355
"""The checker has completed, so take appropriate actions."""
321
356
self.checker_callback_tag = None
322
357
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
358
if os.WIFEXITED(condition):
328
359
exitstatus = os.WEXITSTATUS(condition)
329
360
if exitstatus == 0:
333
364
else:
334
365
logger.info(u"Checker for %(name)s failed",
335
366
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
367
else:
342
368
logger.warning(u"Checker for %(name)s crashed?",
343
369
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
370
350
371
def checked_ok(self):
351
372
"""Bump up the timeout for this client.
373
352
374
This should only be called when the client has been seen,
353
375
alive and well.
354
376
"""
357
379
self.disable_initiator_tag = (gobject.timeout_add
358
380
(self.timeout_milliseconds(),
359
381
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
382
367
383
def start_checker(self):
368
384
"""Start a new checker subprocess if one is not running.
385
369
386
If a checker already exists, leave it running and do
370
387
nothing."""
371
388
# The reason for not killing a running checker is that if we
376
393
# checkers alone, the checker would have to take more time
377
394
# than 'timeout' for the client to be declared invalid, which
378
395
# is as it should be.
396
397
# If a checker exists, make sure it is not a zombie
398
if self.checker is not None:
399
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
400
if pid:
401
logger.warning(u"Checker was a zombie")
402
gobject.source_remove(self.checker_callback_tag)
403
self.checker_callback(pid, status,
404
self.current_checker_command)
405
# Start a new checker if needed
379
406
if self.checker is None:
380
407
try:
381
408
# In case checker_command has exactly one % operator
382
409
command = self.checker_command % self.host
383
410
except TypeError:
384
411
# Escape attributes for the shell
385
escaped_attrs = dict((key, re.escape(str(val)))
412
escaped_attrs = dict((key,
413
re.escape(unicode(str(val),
414
errors=
415
u'replace')))
386
416
for key, val in
387
417
vars(self).iteritems())
388
418
try:
391
421
logger.error(u'Could not format string "%s":'
392
422
u' %s', self.checker_command, error)
393
423
return True # Try again later
424
self.current_checker_command = command
394
425
try:
395
426
logger.info(u"Starting checker %r for %s",
396
427
command, self.name)
400
431
# always replaced by /dev/null.)
401
432
self.checker = subprocess.Popen(command,
402
433
close_fds=True,
403
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))
434
shell=True, cwd=u"/")
410
435
self.checker_callback_tag = (gobject.child_watch_add
411
436
(self.checker.pid,
412
437
self.checker_callback,
413
438
data=command))
439
# The checker may have completed before the gobject
440
# watch was added. Check for this.
441
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
442
if pid:
443
gobject.source_remove(self.checker_callback_tag)
444
self.checker_callback(pid, status, command)
414
445
except OSError, error:
415
446
logger.error(u"Failed to start subprocess: %s",
416
447
error)
422
453
if self.checker_callback_tag:
423
454
gobject.source_remove(self.checker_callback_tag)
424
455
self.checker_callback_tag = None
425
if getattr(self, "checker", None) is None:
456
if getattr(self, u"checker", None) is None:
426
457
return
427
458
logger.debug(u"Stopping checker for %(name)s", vars(self))
428
459
try:
434
465
if error.errno != errno.ESRCH: # No such process
435
466
raise
436
467
self.checker = None
437
if self.use_dbus:
438
self.PropertyChanged(dbus.String(u"checker_running"),
439
dbus.Boolean(False, variant_level=1))
440
468
441
469
def still_valid(self):
442
470
"""Has the timeout not yet passed for this client?"""
443
if not getattr(self, "enabled", False):
471
if not getattr(self, u"enabled", False):
444
472
return False
445
473
now = datetime.datetime.utcnow()
446
474
if self.last_checked_ok is None:
447
475
return now < (self.created + self.timeout)
448
476
else:
449
477
return now < (self.last_checked_ok + self.timeout)
478
479
480
class ClientDBus(Client, dbus.service.Object):
481
"""A Client class using D-Bus
482
483
Attributes:
484
dbus_object_path: dbus.ObjectPath
485
bus: dbus.SystemBus()
486
"""
487
# dbus.service.Object doesn't use super(), so we can't either.
488
489
def __init__(self, bus = None, *args, **kwargs):
490
self.bus = bus
491
Client.__init__(self, *args, **kwargs)
492
# Only now, when this client is initialized, can it show up on
493
# the D-Bus
494
self.dbus_object_path = (dbus.ObjectPath
495
(u"/clients/"
496
+ self.name.replace(u".", u"_")))
497
dbus.service.Object.__init__(self, self.bus,
498
self.dbus_object_path)
499
500
@staticmethod
501
def _datetime_to_dbus(dt, variant_level=0):
502
"""Convert a UTC datetime.datetime() to a D-Bus type."""
503
return dbus.String(dt.isoformat(),
504
variant_level=variant_level)
505
506
def enable(self):
507
oldstate = getattr(self, u"enabled", False)
508
r = Client.enable(self)
509
if oldstate != self.enabled:
510
# Emit D-Bus signals
511
self.PropertyChanged(dbus.String(u"enabled"),
512
dbus.Boolean(True, variant_level=1))
513
self.PropertyChanged(
514
dbus.String(u"last_enabled"),
515
self._datetime_to_dbus(self.last_enabled,
516
variant_level=1))
517
return r
518
519
def disable(self, signal = True):
520
oldstate = getattr(self, u"enabled", False)
521
r = Client.disable(self)
522
if signal and oldstate != self.enabled:
523
# Emit D-Bus signal
524
self.PropertyChanged(dbus.String(u"enabled"),
525
dbus.Boolean(False, variant_level=1))
526
return r
527
528
def __del__(self, *args, **kwargs):
529
try:
530
self.remove_from_connection()
531
except LookupError:
532
pass
533
if hasattr(dbus.service.Object, u"__del__"):
534
dbus.service.Object.__del__(self, *args, **kwargs)
535
Client.__del__(self, *args, **kwargs)
536
537
def checker_callback(self, pid, condition, command,
538
*args, **kwargs):
539
self.checker_callback_tag = None
540
self.checker = None
541
# Emit D-Bus signal
542
self.PropertyChanged(dbus.String(u"checker_running"),
543
dbus.Boolean(False, variant_level=1))
544
if os.WIFEXITED(condition):
545
exitstatus = os.WEXITSTATUS(condition)
546
# Emit D-Bus signal
547
self.CheckerCompleted(dbus.Int16(exitstatus),
548
dbus.Int64(condition),
549
dbus.String(command))
550
else:
551
# Emit D-Bus signal
552
self.CheckerCompleted(dbus.Int16(-1),
553
dbus.Int64(condition),
554
dbus.String(command))
555
556
return Client.checker_callback(self, pid, condition, command,
557
*args, **kwargs)
558
559
def checked_ok(self, *args, **kwargs):
560
r = Client.checked_ok(self, *args, **kwargs)
561
# Emit D-Bus signal
562
self.PropertyChanged(
563
dbus.String(u"last_checked_ok"),
564
(self._datetime_to_dbus(self.last_checked_ok,
565
variant_level=1)))
566
return r
567
568
def start_checker(self, *args, **kwargs):
569
old_checker = self.checker
570
if self.checker is not None:
571
old_checker_pid = self.checker.pid
572
else:
573
old_checker_pid = None
574
r = Client.start_checker(self, *args, **kwargs)
575
# Only if new checker process was started
576
if (self.checker is not None
577
and old_checker_pid != self.checker.pid):
578
# Emit D-Bus signal
579
self.CheckerStarted(self.current_checker_command)
580
self.PropertyChanged(
581
dbus.String(u"checker_running"),
582
dbus.Boolean(True, variant_level=1))
583
return r
584
585
def stop_checker(self, *args, **kwargs):
586
old_checker = getattr(self, u"checker", None)
587
r = Client.stop_checker(self, *args, **kwargs)
588
if (old_checker is not None
589
and getattr(self, u"checker", None) is None):
590
self.PropertyChanged(dbus.String(u"checker_running"),
591
dbus.Boolean(False, variant_level=1))
592
return r
450
593
451
594
## D-Bus methods & signals
452
595
_interface = u"se.bsnet.fukt.Mandos.Client"
453
596
454
597
# CheckedOK - method
455
CheckedOK = dbus.service.method(_interface)(checked_ok)
456
CheckedOK.__name__ = "CheckedOK"
598
@dbus.service.method(_interface)
599
def CheckedOK(self):
600
return self.checked_ok()
457
601
458
602
# CheckerCompleted - signal
459
@dbus.service.signal(_interface, signature="nxs")
603
@dbus.service.signal(_interface, signature=u"nxs")
460
604
def CheckerCompleted(self, exitcode, waitstatus, command):
461
605
"D-Bus signal"
462
606
pass
463
607
464
608
# CheckerStarted - signal
465
@dbus.service.signal(_interface, signature="s")
609
@dbus.service.signal(_interface, signature=u"s")
466
610
def CheckerStarted(self, command):
467
611
"D-Bus signal"
468
612
pass
469
613
470
614
# GetAllProperties - method
471
@dbus.service.method(_interface, out_signature="a{sv}")
615
@dbus.service.method(_interface, out_signature=u"a{sv}")
472
616
def GetAllProperties(self):
473
617
"D-Bus method"
474
618
return dbus.Dictionary({
475
dbus.String("name"):
619
dbus.String(u"name"):
476
620
dbus.String(self.name, variant_level=1),
477
dbus.String("fingerprint"):
621
dbus.String(u"fingerprint"):
478
622
dbus.String(self.fingerprint, variant_level=1),
479
dbus.String("host"):
623
dbus.String(u"host"):
480
624
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)
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)
486
631
if self.last_enabled is not None
487
632
else dbus.Boolean(False, variant_level=1)),
488
dbus.String("enabled"):
633
dbus.String(u"enabled"):
489
634
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)
635
dbus.String(u"last_checked_ok"):
636
(self._datetime_to_dbus(self.last_checked_ok,
637
variant_level=1)
493
638
if self.last_checked_ok is not None
494
639
else dbus.Boolean (False, variant_level=1)),
495
dbus.String("timeout"):
640
dbus.String(u"timeout"):
496
641
dbus.UInt64(self.timeout_milliseconds(),
497
642
variant_level=1),
498
dbus.String("interval"):
643
dbus.String(u"interval"):
499
644
dbus.UInt64(self.interval_milliseconds(),
500
645
variant_level=1),
501
dbus.String("checker"):
646
dbus.String(u"checker"):
502
647
dbus.String(self.checker_command,
503
648
variant_level=1),
504
dbus.String("checker_running"):
649
dbus.String(u"checker_running"):
505
650
dbus.Boolean(self.checker is not None,
506
651
variant_level=1),
507
dbus.String("object_path"):
652
dbus.String(u"object_path"):
508
653
dbus.ObjectPath(self.dbus_object_path,
509
654
variant_level=1)
510
}, signature="sv")
655
}, signature=u"sv")
511
656
512
657
# IsStillValid - method
513
IsStillValid = (dbus.service.method(_interface, out_signature="b")
514
(still_valid))
515
IsStillValid.__name__ = "IsStillValid"
658
@dbus.service.method(_interface, out_signature=u"b")
659
def IsStillValid(self):
660
return self.still_valid()
516
661
517
662
# PropertyChanged - signal
518
@dbus.service.signal(_interface, signature="sv")
663
@dbus.service.signal(_interface, signature=u"sv")
519
664
def PropertyChanged(self, property, value):
520
665
"D-Bus signal"
521
666
pass
522
667
668
# ReceivedSecret - signal
669
@dbus.service.signal(_interface)
670
def ReceivedSecret(self):
671
"D-Bus signal"
672
pass
673
674
# Rejected - signal
675
@dbus.service.signal(_interface)
676
def Rejected(self):
677
"D-Bus signal"
678
pass
679
523
680
# SetChecker - method
524
@dbus.service.method(_interface, in_signature="s")
681
@dbus.service.method(_interface, in_signature=u"s")
525
682
def SetChecker(self, checker):
526
683
"D-Bus setter method"
527
684
self.checker_command = checker
531
688
variant_level=1))
532
689
533
690
# SetHost - method
534
@dbus.service.method(_interface, in_signature="s")
691
@dbus.service.method(_interface, in_signature=u"s")
535
692
def SetHost(self, host):
536
693
"D-Bus setter method"
537
694
self.host = host
540
697
dbus.String(self.host, variant_level=1))
541
698
542
699
# SetInterval - method
543
@dbus.service.method(_interface, in_signature="t")
700
@dbus.service.method(_interface, in_signature=u"t")
544
701
def SetInterval(self, milliseconds):
545
702
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
546
703
# Emit D-Bus signal
549
706
variant_level=1)))
550
707
551
708
# SetSecret - method
552
@dbus.service.method(_interface, in_signature="ay",
709
@dbus.service.method(_interface, in_signature=u"ay",
553
710
byte_arrays=True)
554
711
def SetSecret(self, secret):
555
712
"D-Bus setter method"
556
713
self.secret = str(secret)
557
714
558
715
# SetTimeout - method
559
@dbus.service.method(_interface, in_signature="t")
716
@dbus.service.method(_interface, in_signature=u"t")
560
717
def SetTimeout(self, milliseconds):
561
718
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
562
719
# Emit D-Bus signal
565
722
variant_level=1)))
566
723
567
724
# Enable - method
568
Enable = dbus.service.method(_interface)(enable)
569
Enable.__name__ = "Enable"
725
@dbus.service.method(_interface)
726
def Enable(self):
727
"D-Bus method"
728
self.enable()
570
729
571
730
# StartChecker - method
572
731
@dbus.service.method(_interface)
581
740
self.disable()
582
741
583
742
# StopChecker - method
584
StopChecker = dbus.service.method(_interface)(stop_checker)
585
StopChecker.__name__ = "StopChecker"
743
@dbus.service.method(_interface)
744
def StopChecker(self):
745
self.stop_checker()
586
746
587
747
del _interface
588
748
589
749
590
def peer_certificate(session):
591
"Return the peer's OpenPGP certificate as a bytestring"
592
# 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):
596
# ...do the normal thing
597
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")
605
if list_size.value == 0:
606
return None
607
cert = cert_list[0]
608
return ctypes.string_at(cert.data, cert.size)
609
610
611
def fingerprint(openpgp):
612
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
613
# 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))))
619
# New empty GnuTLS certificate
620
crt = gnutls.library.types.gnutls_openpgp_crt_t()
621
(gnutls.library.functions
622
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
623
# 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))
628
# 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)))
632
if crtverify.value != 0:
633
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
634
raise gnutls.errors.CertificateSecurityError("Verify failed")
635
# New buffer for the fingerprint
636
buf = ctypes.create_string_buffer(20)
637
buf_len = ctypes.c_size_t()
638
# 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)))
642
# Deinit the certificate
643
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
644
# Convert the buffer to a Python bytestring
645
fpr = ctypes.string_at(buf, buf_len.value)
646
# Convert the bytestring to hexadecimal notation
647
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
648
return hex_fpr
649
650
651
class TCP_handler(SocketServer.BaseRequestHandler, object):
652
"""A TCP request handler class.
653
Instantiated by IPv6_TCPServer for each request to handle it.
750
class ClientHandler(socketserver.BaseRequestHandler, object):
751
"""A class to handle client connections.
752
753
Instantiated once for each connection to handle it.
654
754
Note: This will run in its own forked process."""
655
755
656
756
def handle(self):
657
757
logger.info(u"TCP connection from: %s",
658
758
unicode(self.client_address))
659
session = (gnutls.connection
660
.ClientSession(self.request,
661
gnutls.connection
662
.X509Credentials()))
663
664
line = self.request.makefile().readline()
665
logger.debug(u"Protocol version: %r", line)
666
try:
667
if int(line.strip().split()[0]) > 1:
668
raise RuntimeError
669
except (ValueError, IndexError, RuntimeError), error:
670
logger.error(u"Unknown protocol version: %s", error)
671
return
672
673
# Note: gnutls.connection.X509Credentials is really a generic
674
# GnuTLS certificate credentials object so long as no X.509
675
# keys are added to it. Therefore, we can use it here despite
676
# using OpenPGP certificates.
677
678
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
679
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
680
# "+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))
686
687
try:
688
session.handshake()
689
except gnutls.errors.GNUTLSError, error:
690
logger.warning(u"Handshake failed: %s", error)
691
# Do not run session.bye() here: the session is not
692
# established. Just abandon the request.
693
return
694
logger.debug(u"Handshake succeeded")
695
try:
696
fpr = fingerprint(peer_certificate(session))
697
except (TypeError, gnutls.errors.GNUTLSError), error:
698
logger.warning(u"Bad certificate: %s", error)
699
session.bye()
700
return
701
logger.debug(u"Fingerprint: %s", fpr)
702
for c in self.server.clients:
703
if c.fingerprint == fpr:
704
client = c
705
break
706
else:
707
logger.warning(u"Client not found for fingerprint: %s",
708
fpr)
709
session.bye()
710
return
711
# Have to check if client.still_valid(), since it is possible
712
# that the client timed out while establishing the GnuTLS
713
# session.
714
if not client.still_valid():
715
logger.warning(u"Client %(name)s is invalid",
716
vars(client))
717
session.bye()
718
return
719
## This won't work here, since we're in a fork.
720
# client.checked_ok()
721
sent_size = 0
722
while sent_size < len(client.secret):
723
sent = session.send(client.secret[sent_size:])
724
logger.debug(u"Sent: %d, remaining: %d",
725
sent, len(client.secret)
726
- (sent_size + sent))
727
sent_size += sent
728
session.bye()
729
730
731
class IPv6_TCPServer(SocketServer.ForkingMixIn,
732
SocketServer.TCPServer, object):
733
"""IPv6 TCP server. Accepts 'None' as address and/or port.
759
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
760
# Open IPC pipe to parent process
761
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
762
session = (gnutls.connection
763
.ClientSession(self.request,
764
gnutls.connection
765
.X509Credentials()))
766
767
line = self.request.makefile().readline()
768
logger.debug(u"Protocol version: %r", line)
769
try:
770
if int(line.strip().split()[0]) > 1:
771
raise RuntimeError
772
except (ValueError, IndexError, RuntimeError), error:
773
logger.error(u"Unknown protocol version: %s", error)
774
return
775
776
# Note: gnutls.connection.X509Credentials is really a
777
# generic GnuTLS certificate credentials object so long as
778
# no X.509 keys are added to it. Therefore, we can use it
779
# here despite using OpenPGP certificates.
780
781
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
782
# u"+AES-256-CBC", u"+SHA1",
783
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
784
# u"+DHE-DSS"))
785
# Use a fallback default, since this MUST be set.
786
priority = self.server.gnutls_priority
787
if priority is None:
788
priority = u"NORMAL"
789
(gnutls.library.functions
790
.gnutls_priority_set_direct(session._c_object,
791
priority, None))
792
793
try:
794
session.handshake()
795
except gnutls.errors.GNUTLSError, error:
796
logger.warning(u"Handshake failed: %s", error)
797
# Do not run session.bye() here: the session is not
798
# established. Just abandon the request.
799
return
800
logger.debug(u"Handshake succeeded")
801
try:
802
fpr = self.fingerprint(self.peer_certificate(session))
803
except (TypeError, gnutls.errors.GNUTLSError), error:
804
logger.warning(u"Bad certificate: %s", error)
805
session.bye()
806
return
807
logger.debug(u"Fingerprint: %s", fpr)
808
809
for c in self.server.clients:
810
if c.fingerprint == fpr:
811
client = c
812
break
813
else:
814
ipc.write(u"NOTFOUND %s\n" % fpr)
815
session.bye()
816
return
817
# Have to check if client.still_valid(), since it is
818
# possible that the client timed out while establishing
819
# the GnuTLS session.
820
if not client.still_valid():
821
ipc.write(u"INVALID %s\n" % client.name)
822
session.bye()
823
return
824
ipc.write(u"SENDING %s\n" % client.name)
825
sent_size = 0
826
while sent_size < len(client.secret):
827
sent = session.send(client.secret[sent_size:])
828
logger.debug(u"Sent: %d, remaining: %d",
829
sent, len(client.secret)
830
- (sent_size + sent))
831
sent_size += sent
832
session.bye()
833
834
@staticmethod
835
def peer_certificate(session):
836
"Return the peer's OpenPGP certificate as a bytestring"
837
# If not an OpenPGP certificate...
838
if (gnutls.library.functions
839
.gnutls_certificate_type_get(session._c_object)
840
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
841
# ...do the normal thing
842
return session.peer_certificate
843
list_size = ctypes.c_uint(1)
844
cert_list = (gnutls.library.functions
845
.gnutls_certificate_get_peers
846
(session._c_object, ctypes.byref(list_size)))
847
if not bool(cert_list) and list_size.value != 0:
848
raise gnutls.errors.GNUTLSError(u"error getting peer"
849
u" certificate")
850
if list_size.value == 0:
851
return None
852
cert = cert_list[0]
853
return ctypes.string_at(cert.data, cert.size)
854
855
@staticmethod
856
def fingerprint(openpgp):
857
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
858
# New GnuTLS "datum" with the OpenPGP public key
859
datum = (gnutls.library.types
860
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
861
ctypes.POINTER
862
(ctypes.c_ubyte)),
863
ctypes.c_uint(len(openpgp))))
864
# New empty GnuTLS certificate
865
crt = gnutls.library.types.gnutls_openpgp_crt_t()
866
(gnutls.library.functions
867
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
868
# Import the OpenPGP public key into the certificate
869
(gnutls.library.functions
870
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
871
gnutls.library.constants
872
.GNUTLS_OPENPGP_FMT_RAW))
873
# Verify the self signature in the key
874
crtverify = ctypes.c_uint()
875
(gnutls.library.functions
876
.gnutls_openpgp_crt_verify_self(crt, 0,
877
ctypes.byref(crtverify)))
878
if crtverify.value != 0:
879
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
880
raise (gnutls.errors.CertificateSecurityError
881
(u"Verify failed"))
882
# New buffer for the fingerprint
883
buf = ctypes.create_string_buffer(20)
884
buf_len = ctypes.c_size_t()
885
# Get the fingerprint from the certificate into the buffer
886
(gnutls.library.functions
887
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
888
ctypes.byref(buf_len)))
889
# Deinit the certificate
890
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
891
# Convert the buffer to a Python bytestring
892
fpr = ctypes.string_at(buf, buf_len.value)
893
# Convert the bytestring to hexadecimal notation
894
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
895
return hex_fpr
896
897
898
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
899
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
900
def process_request(self, request, client_address):
901
"""Overrides and wraps the original process_request().
902
903
This function creates a new pipe in self.pipe
904
"""
905
self.pipe = os.pipe()
906
super(ForkingMixInWithPipe,
907
self).process_request(request, client_address)
908
os.close(self.pipe[1]) # close write end
909
self.add_pipe(self.pipe[0])
910
def add_pipe(self, pipe):
911
"""Dummy function; override as necessary"""
912
os.close(pipe)
913
914
915
class IPv6_TCPServer(ForkingMixInWithPipe,
916
socketserver.TCPServer, object):
917
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
918
734
919
Attributes:
735
settings: Server settings
736
clients: Set() of Client objects
737
920
enabled: Boolean; whether this server is activated yet
921
interface: None or a network interface name (string)
922
use_ipv6: Boolean; to use IPv6 or not
738
923
"""
739
address_family = socket.AF_INET6
740
def __init__(self, *args, **kwargs):
741
if "settings" in kwargs:
742
self.settings = kwargs["settings"]
743
del kwargs["settings"]
744
if "clients" in kwargs:
745
self.clients = kwargs["clients"]
746
del kwargs["clients"]
747
self.enabled = False
748
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
924
def __init__(self, server_address, RequestHandlerClass,
925
interface=None, use_ipv6=True):
926
self.interface = interface
927
if use_ipv6:
928
self.address_family = socket.AF_INET6
929
socketserver.TCPServer.__init__(self, server_address,
930
RequestHandlerClass)
749
931
def server_bind(self):
750
932
"""This overrides the normal server_bind() function
751
933
to bind to an interface if one was specified, and also NOT to
752
934
bind to an address or port if they were not specified."""
753
if self.settings["interface"]:
754
# 25 is from /usr/include/asm-i486/socket.h
755
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
756
try:
757
self.socket.setsockopt(socket.SOL_SOCKET,
758
SO_BINDTODEVICE,
759
self.settings["interface"])
760
except socket.error, error:
761
if error[0] == errno.EPERM:
762
logger.error(u"No permission to"
763
u" bind to interface %s",
764
self.settings["interface"])
765
else:
766
raise error
935
if self.interface is not None:
936
if SO_BINDTODEVICE is None:
937
logger.error(u"SO_BINDTODEVICE does not exist;"
938
u" cannot bind to interface %s",
939
self.interface)
940
else:
941
try:
942
self.socket.setsockopt(socket.SOL_SOCKET,
943
SO_BINDTODEVICE,
944
str(self.interface
945
+ u'\0'))
946
except socket.error, error:
947
if error[0] == errno.EPERM:
948
logger.error(u"No permission to"
949
u" bind to interface %s",
950
self.interface)
951
elif error[0] == errno.ENOPROTOOPT:
952
logger.error(u"SO_BINDTODEVICE not available;"
953
u" cannot bind to interface %s",
954
self.interface)
955
else:
956
raise
767
957
# Only bind(2) the socket if we really need to.
768
958
if self.server_address[0] or self.server_address[1]:
769
959
if not self.server_address[0]:
770
in6addr_any = "::"
771
self.server_address = (in6addr_any,
960
if self.address_family == socket.AF_INET6:
961
any_address = u"::" # in6addr_any
962
else:
963
any_address = socket.INADDR_ANY
964
self.server_address = (any_address,
772
965
self.server_address[1])
773
966
elif not self.server_address[1]:
774
967
self.server_address = (self.server_address[0],
775
968
0)
776
# if self.settings["interface"]:
969
# if self.interface:
777
970
# self.server_address = (self.server_address[0],
778
971
# 0, # port
779
972
# 0, # flowinfo
780
973
# if_nametoindex
781
# (self.settings
782
# ["interface"]))
783
return super(IPv6_TCPServer, self).server_bind()
974
# (self.interface))
975
return socketserver.TCPServer.server_bind(self)
976
977
978
class MandosServer(IPv6_TCPServer):
979
"""Mandos server.
980
981
Attributes:
982
clients: set of Client objects
983
gnutls_priority GnuTLS priority string
984
use_dbus: Boolean; to emit D-Bus signals or not
985
clients: set of Client objects
986
gnutls_priority GnuTLS priority string
987
use_dbus: Boolean; to emit D-Bus signals or not
988
989
Assumes a gobject.MainLoop event loop.
990
"""
991
def __init__(self, server_address, RequestHandlerClass,
992
interface=None, use_ipv6=True, clients=None,
993
gnutls_priority=None, use_dbus=True):
994
self.enabled = False
995
self.clients = clients
996
if self.clients is None:
997
self.clients = set()
998
self.use_dbus = use_dbus
999
self.gnutls_priority = gnutls_priority
1000
IPv6_TCPServer.__init__(self, server_address,
1001
RequestHandlerClass,
1002
interface = interface,
1003
use_ipv6 = use_ipv6)
784
1004
def server_activate(self):
785
1005
if self.enabled:
786
return super(IPv6_TCPServer, self).server_activate()
1006
return socketserver.TCPServer.server_activate(self)
787
1007
def enable(self):
788
1008
self.enabled = True
1009
def add_pipe(self, pipe):
1010
# Call "handle_ipc" for both data and EOF events
1011
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1012
self.handle_ipc)
1013
def handle_ipc(self, source, condition, file_objects={}):
1014
condition_names = {
1015
gobject.IO_IN: u"IN", # There is data to read.
1016
gobject.IO_OUT: u"OUT", # Data can be written (without
1017
# blocking).
1018
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1019
gobject.IO_ERR: u"ERR", # Error condition.
1020
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1021
# broken, usually for pipes and
1022
# sockets).
1023
}
1024
conditions_string = ' | '.join(name
1025
for cond, name in
1026
condition_names.iteritems()
1027
if cond & condition)
1028
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1029
conditions_string)
1030
1031
# Turn the pipe file descriptor into a Python file object
1032
if source not in file_objects:
1033
file_objects[source] = os.fdopen(source, u"r", 1)
1034
1035
# Read a line from the file object
1036
cmdline = file_objects[source].readline()
1037
if not cmdline: # Empty line means end of file
1038
# close the IPC pipe
1039
file_objects[source].close()
1040
del file_objects[source]
1041
1042
# Stop calling this function
1043
return False
1044
1045
logger.debug(u"IPC command: %r", cmdline)
1046
1047
# Parse and act on command
1048
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1049
1050
if cmd == u"NOTFOUND":
1051
logger.warning(u"Client not found for fingerprint: %s",
1052
args)
1053
if self.use_dbus:
1054
# Emit D-Bus signal
1055
mandos_dbus_service.ClientNotFound(args)
1056
elif cmd == u"INVALID":
1057
for client in self.clients:
1058
if client.name == args:
1059
logger.warning(u"Client %s is invalid", args)
1060
if self.use_dbus:
1061
# Emit D-Bus signal
1062
client.Rejected()
1063
break
1064
else:
1065
logger.error(u"Unknown client %s is invalid", args)
1066
elif cmd == u"SENDING":
1067
for client in self.clients:
1068
if client.name == args:
1069
logger.info(u"Sending secret to %s", client.name)
1070
client.checked_ok()
1071
if self.use_dbus:
1072
# Emit D-Bus signal
1073
client.ReceivedSecret()
1074
break
1075
else:
1076
logger.error(u"Sending secret to unknown client %s",
1077
args)
1078
else:
1079
logger.error(u"Unknown IPC command: %r", cmdline)
1080
1081
# Keep calling this function
1082
return True
789
1083
790
1084
791
1085
def string_to_delta(interval):
792
1086
"""Parse a string and return a datetime.timedelta
793
794
>>> string_to_delta('7d')
1087
1088
>>> string_to_delta(u'7d')
795
1089
datetime.timedelta(7)
796
>>> string_to_delta('60s')
1090
>>> string_to_delta(u'60s')
797
1091
datetime.timedelta(0, 60)
798
>>> string_to_delta('60m')
1092
>>> string_to_delta(u'60m')
799
1093
datetime.timedelta(0, 3600)
800
>>> string_to_delta('24h')
1094
>>> string_to_delta(u'24h')
801
1095
datetime.timedelta(1)
802
1096
>>> string_to_delta(u'1w')
803
1097
datetime.timedelta(7)
804
>>> string_to_delta('5m 30s')
1098
>>> string_to_delta(u'5m 30s')
805
1099
datetime.timedelta(0, 330)
806
1100
"""
807
1101
timevalue = datetime.timedelta(0)
827
1121
return timevalue
828
1122
829
1123
830
def server_state_changed(state):
831
"""Derived from the Avahi example code"""
832
if state == avahi.SERVER_COLLISION:
833
logger.error(u"Zeroconf server name collision")
834
service.remove()
835
elif state == avahi.SERVER_RUNNING:
836
service.add()
837
838
839
def entry_group_state_changed(state, error):
840
"""Derived from the Avahi example code"""
841
logger.debug(u"Avahi state change: %i", state)
842
843
if state == avahi.ENTRY_GROUP_ESTABLISHED:
844
logger.debug(u"Zeroconf service established.")
845
elif state == avahi.ENTRY_GROUP_COLLISION:
846
logger.warning(u"Zeroconf service name collision.")
847
service.rename()
848
elif state == avahi.ENTRY_GROUP_FAILURE:
849
logger.critical(u"Avahi: Error in group state changed %s",
850
unicode(error))
851
raise AvahiGroupError(u"State changed: %s" % unicode(error))
852
853
1124
def if_nametoindex(interface):
854
"""Call the C function if_nametoindex(), or equivalent"""
1125
"""Call the C function if_nametoindex(), or equivalent
1126
1127
Note: This function cannot accept a unicode string."""
855
1128
global if_nametoindex
856
1129
try:
857
1130
if_nametoindex = (ctypes.cdll.LoadLibrary
858
(ctypes.util.find_library("c"))
1131
(ctypes.util.find_library(u"c"))
859
1132
.if_nametoindex)
860
1133
except (OSError, AttributeError):
861
if "struct" not in sys.modules:
862
import struct
863
if "fcntl" not in sys.modules:
864
import fcntl
1134
logger.warning(u"Doing if_nametoindex the hard way")
865
1135
def if_nametoindex(interface):
866
1136
"Get an interface index the hard way, i.e. using fcntl()"
867
1137
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
868
1138
with closing(socket.socket()) as s:
869
1139
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
870
struct.pack("16s16x", interface))
871
interface_index = struct.unpack("I", ifreq[16:20])[0]
1140
struct.pack(str(u"16s16x"),
1141
interface))
1142
interface_index = struct.unpack(str(u"I"),
1143
ifreq[16:20])[0]
872
1144
return interface_index
873
1145
return if_nametoindex(interface)
874
1146
875
1147
876
1148
def daemon(nochdir = False, noclose = False):
877
1149
"""See daemon(3). Standard BSD Unix function.
1150
878
1151
This should really exist as os.daemon, but it doesn't (yet)."""
879
1152
if os.fork():
880
1153
sys.exit()
881
1154
os.setsid()
882
1155
if not nochdir:
883
os.chdir("/")
1156
os.chdir(u"/")
884
1157
if os.fork():
885
1158
sys.exit()
886
1159
if not noclose:
888
1161
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
889
1162
if not stat.S_ISCHR(os.fstat(null).st_mode):
890
1163
raise OSError(errno.ENODEV,
891
"/dev/null not a character device")
1164
u"/dev/null not a character device")
892
1165
os.dup2(null, sys.stdin.fileno())
893
1166
os.dup2(null, sys.stdout.fileno())
894
1167
os.dup2(null, sys.stderr.fileno())
897
1170
898
1171
899
1172
def main():
1173
1174
######################################################################
1175
# Parsing of options, both command line and config file
1176
900
1177
parser = optparse.OptionParser(version = "%%prog %s" % version)
901
parser.add_option("-i", "--interface", type="string",
902
metavar="IF", help="Bind to interface IF")
903
parser.add_option("-a", "--address", type="string",
904
help="Address to listen for requests on")
905
parser.add_option("-p", "--port", type="int",
906
help="Port number to receive requests on")
907
parser.add_option("--check", action="store_true",
908
help="Run self-test")
909
parser.add_option("--debug", action="store_true",
910
help="Debug mode; run in foreground and log to"
911
" terminal")
912
parser.add_option("--priority", type="string", help="GnuTLS"
913
" priority string (see GnuTLS documentation)")
914
parser.add_option("--servicename", type="string", metavar="NAME",
915
help="Zeroconf service name")
916
parser.add_option("--configdir", type="string",
917
default="/etc/mandos", metavar="DIR",
918
help="Directory to search for configuration"
919
" 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")
1178
parser.add_option("-i", u"--interface", type=u"string",
1179
metavar="IF", help=u"Bind to interface IF")
1180
parser.add_option("-a", u"--address", type=u"string",
1181
help=u"Address to listen for requests on")
1182
parser.add_option("-p", u"--port", type=u"int",
1183
help=u"Port number to receive requests on")
1184
parser.add_option("--check", action=u"store_true",
1185
help=u"Run self-test")
1186
parser.add_option("--debug", action=u"store_true",
1187
help=u"Debug mode; run in foreground and log to"
1188
u" terminal")
1189
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1190
u" priority string (see GnuTLS documentation)")
1191
parser.add_option("--servicename", type=u"string",
1192
metavar=u"NAME", help=u"Zeroconf service name")
1193
parser.add_option("--configdir", type=u"string",
1194
default=u"/etc/mandos", metavar=u"DIR",
1195
help=u"Directory to search for configuration"
1196
u" files")
1197
parser.add_option("--no-dbus", action=u"store_false",
1198
dest=u"use_dbus", help=u"Do not provide D-Bus"
1199
u" system bus interface")
1200
parser.add_option("--no-ipv6", action=u"store_false",
1201
dest=u"use_ipv6", help=u"Do not use IPv6")
924
1202
options = parser.parse_args()[0]
925
1203
926
1204
if options.check:
929
1207
sys.exit()
930
1208
931
1209
# Default values for config file for server-global settings
932
server_defaults = { "interface": "",
933
"address": "",
934
"port": "",
935
"debug": "False",
936
"priority":
937
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
938
"servicename": "Mandos",
939
"use_dbus": "True",
1210
server_defaults = { u"interface": u"",
1211
u"address": u"",
1212
u"port": u"",
1213
u"debug": u"False",
1214
u"priority":
1215
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1216
u"servicename": u"Mandos",
1217
u"use_dbus": u"True",
1218
u"use_ipv6": u"True",
940
1219
}
941
1220
942
1221
# Parse config file for server-global settings
943
server_config = ConfigParser.SafeConfigParser(server_defaults)
1222
server_config = configparser.SafeConfigParser(server_defaults)
944
1223
del server_defaults
945
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1224
server_config.read(os.path.join(options.configdir,
1225
u"mandos.conf"))
946
1226
# Convert the SafeConfigParser object to a dict
947
1227
server_settings = server_config.defaults()
948
1228
# 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")
1229
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1230
server_settings[option] = server_config.getboolean(u"DEFAULT",
1231
option)
953
1232
if server_settings["port"]:
954
server_settings["port"] = server_config.getint("DEFAULT",
955
"port")
1233
server_settings["port"] = server_config.getint(u"DEFAULT",
1234
u"port")
956
1235
del server_config
957
1236
958
1237
# Override the settings from the config file with command line
959
1238
# options, if set.
960
for option in ("interface", "address", "port", "debug",
961
"priority", "servicename", "configdir",
962
"use_dbus"):
1239
for option in (u"interface", u"address", u"port", u"debug",
1240
u"priority", u"servicename", u"configdir",
1241
u"use_dbus", u"use_ipv6"):
963
1242
value = getattr(options, option)
964
1243
if value is not None:
965
1244
server_settings[option] = value
966
1245
del options
1246
# Force all strings to be unicode
1247
for option in server_settings.keys():
1248
if type(server_settings[option]) is str:
1249
server_settings[option] = unicode(server_settings[option])
967
1250
# Now we have our good server settings in "server_settings"
968
1251
1252
##################################################################
1253
969
1254
# For convenience
970
debug = server_settings["debug"]
971
use_dbus = server_settings["use_dbus"]
1255
debug = server_settings[u"debug"]
1256
use_dbus = server_settings[u"use_dbus"]
1257
use_ipv6 = server_settings[u"use_ipv6"]
972
1258
973
1259
if not debug:
974
1260
syslogger.setLevel(logging.WARNING)
975
1261
console.setLevel(logging.WARNING)
976
1262
977
if server_settings["servicename"] != "Mandos":
1263
if server_settings[u"servicename"] != u"Mandos":
978
1264
syslogger.setFormatter(logging.Formatter
979
('Mandos (%s): %%(levelname)s:'
980
' %%(message)s'
981
% server_settings["servicename"]))
1265
(u'Mandos (%s) [%%(process)d]:'
1266
u' %%(levelname)s: %%(message)s'
1267
% server_settings[u"servicename"]))
982
1268
983
1269
# Parse config file with clients
984
client_defaults = { "timeout": "1h",
985
"interval": "5m",
986
"checker": "fping -q -- %%(host)s",
987
"host": "",
1270
client_defaults = { u"timeout": u"1h",
1271
u"interval": u"5m",
1272
u"checker": u"fping -q -- %%(host)s",
1273
u"host": u"",
988
1274
}
989
client_config = ConfigParser.SafeConfigParser(client_defaults)
990
client_config.read(os.path.join(server_settings["configdir"],
991
"clients.conf"))
992
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
1275
client_config = configparser.SafeConfigParser(client_defaults)
1276
client_config.read(os.path.join(server_settings[u"configdir"],
1277
u"clients.conf"))
1278
1279
global mandos_dbus_service
1280
mandos_dbus_service = None
1281
1282
tcp_server = MandosServer((server_settings[u"address"],
1283
server_settings[u"port"]),
1284
ClientHandler,
1285
interface=server_settings[u"interface"],
1286
use_ipv6=use_ipv6,
1287
gnutls_priority=
1288
server_settings[u"priority"],
1289
use_dbus=use_dbus)
1290
pidfilename = u"/var/run/mandos.pid"
1291
try:
1292
pidfile = open(pidfilename, u"w")
1293
except IOError:
1294
logger.error(u"Could not open file %r", pidfilename)
1295
1296
try:
1297
uid = pwd.getpwnam(u"_mandos").pw_uid
1298
gid = pwd.getpwnam(u"_mandos").pw_gid
1008
1299
except KeyError:
1009
1300
try:
1010
uid = pwd.getpwnam("mandos").pw_uid
1011
gid = pwd.getpwnam("mandos").pw_gid
1301
uid = pwd.getpwnam(u"mandos").pw_uid
1302
gid = pwd.getpwnam(u"mandos").pw_gid
1012
1303
except KeyError:
1013
1304
try:
1014
uid = pwd.getpwnam("nobody").pw_uid
1015
gid = pwd.getpwnam("nogroup").pw_gid
1305
uid = pwd.getpwnam(u"nobody").pw_uid
1306
gid = pwd.getpwnam(u"nobody").pw_gid
1016
1307
except KeyError:
1017
1308
uid = 65534
1018
1309
gid = 65534
1019
1310
try:
1311
os.setgid(gid)
1020
1312
os.setuid(uid)
1021
os.setgid(gid)
1022
1313
except OSError, error:
1023
1314
if error[0] != errno.EPERM:
1024
1315
raise error
1025
1316
1026
global service
1027
service = AvahiService(name = server_settings["servicename"],
1028
servicetype = "_mandos._tcp", )
1029
if server_settings["interface"]:
1030
service.interface = (if_nametoindex
1031
(server_settings["interface"]))
1317
# Enable all possible GnuTLS debugging
1318
if debug:
1319
# "Use a log level over 10 to enable all debugging options."
1320
# - GnuTLS manual
1321
gnutls.library.functions.gnutls_global_set_log_level(11)
1322
1323
@gnutls.library.types.gnutls_log_func
1324
def debug_gnutls(level, string):
1325
logger.debug(u"GnuTLS: %s", string[:-1])
1326
1327
(gnutls.library.functions
1328
.gnutls_global_set_log_function(debug_gnutls))
1032
1329
1033
1330
global main_loop
1034
global bus
1035
global server
1036
1331
# From the Avahi example code
1037
1332
DBusGMainLoop(set_as_default=True )
1038
1333
main_loop = gobject.MainLoop()
1039
1334
bus = dbus.SystemBus()
1040
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1041
avahi.DBUS_PATH_SERVER),
1042
avahi.DBUS_INTERFACE_SERVER)
1043
1335
# End of Avahi example code
1044
1336
if use_dbus:
1045
1337
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1338
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1339
service = AvahiService(name = server_settings[u"servicename"],
1340
servicetype = u"_mandos._tcp",
1341
protocol = protocol, bus = bus)
1342
if server_settings["interface"]:
1343
service.interface = (if_nametoindex
1344
(str(server_settings[u"interface"])))
1046
1345
1047
clients.update(Set(Client(name = section,
1048
config
1049
= dict(client_config.items(section)),
1050
use_dbus = use_dbus)
1051
for section in client_config.sections()))
1052
if not clients:
1346
client_class = Client
1347
if use_dbus:
1348
client_class = functools.partial(ClientDBus, bus = bus)
1349
tcp_server.clients.update(set(
1350
client_class(name = section,
1351
config= dict(client_config.items(section)))
1352
for section in client_config.sections()))
1353
if not tcp_server.clients:
1053
1354
logger.warning(u"No clients defined")
1054
1355
1055
1356
if debug:
1065
1366
daemon()
1066
1367
1067
1368
try:
1068
pid = os.getpid()
1069
pidfile.write(str(pid) + "\n")
1070
pidfile.close()
1369
with closing(pidfile):
1370
pid = os.getpid()
1371
pidfile.write(str(pid) + "\n")
1071
1372
del pidfile
1072
1373
except IOError:
1073
1374
logger.error(u"Could not write to file %r with PID %d",
1079
1380
1080
1381
def cleanup():
1081
1382
"Cleanup function; run on exit"
1082
global group
1083
# From the Avahi example code
1084
if not group is None:
1085
group.Free()
1086
group = None
1087
# End of Avahi example code
1383
service.cleanup()
1088
1384
1089
while clients:
1090
client = clients.pop()
1385
while tcp_server.clients:
1386
client = tcp_server.clients.pop()
1091
1387
client.disable_hook = None
1092
1388
client.disable()
1093
1389
1099
1395
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1100
1396
1101
1397
if use_dbus:
1102
class MandosServer(dbus.service.Object):
1398
class MandosDBusService(dbus.service.Object):
1103
1399
"""A D-Bus proxy object"""
1104
1400
def __init__(self):
1105
dbus.service.Object.__init__(self, bus, "/")
1401
dbus.service.Object.__init__(self, bus, u"/")
1106
1402
_interface = u"se.bsnet.fukt.Mandos"
1107
1403
1108
@dbus.service.signal(_interface, signature="oa{sv}")
1404
@dbus.service.signal(_interface, signature=u"oa{sv}")
1109
1405
def ClientAdded(self, objpath, properties):
1110
1406
"D-Bus signal"
1111
1407
pass
1112
1408
1113
@dbus.service.signal(_interface, signature="os")
1409
@dbus.service.signal(_interface, signature=u"s")
1410
def ClientNotFound(self, fingerprint):
1411
"D-Bus signal"
1412
pass
1413
1414
@dbus.service.signal(_interface, signature=u"os")
1114
1415
def ClientRemoved(self, objpath, name):
1115
1416
"D-Bus signal"
1116
1417
pass
1117
1418
1118
@dbus.service.method(_interface, out_signature="ao")
1419
@dbus.service.method(_interface, out_signature=u"ao")
1119
1420
def GetAllClients(self):
1120
1421
"D-Bus method"
1121
return dbus.Array(c.dbus_object_path for c in clients)
1422
return dbus.Array(c.dbus_object_path
1423
for c in tcp_server.clients)
1122
1424
1123
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1425
@dbus.service.method(_interface,
1426
out_signature=u"a{oa{sv}}")
1124
1427
def GetAllClientsWithProperties(self):
1125
1428
"D-Bus method"
1126
1429
return dbus.Dictionary(
1127
1430
((c.dbus_object_path, c.GetAllProperties())
1128
for c in clients),
1129
signature="oa{sv}")
1431
for c in tcp_server.clients),
1432
signature=u"oa{sv}")
1130
1433
1131
@dbus.service.method(_interface, in_signature="o")
1434
@dbus.service.method(_interface, in_signature=u"o")
1132
1435
def RemoveClient(self, object_path):
1133
1436
"D-Bus method"
1134
for c in clients:
1437
for c in tcp_server.clients:
1135
1438
if c.dbus_object_path == object_path:
1136
clients.remove(c)
1439
tcp_server.clients.remove(c)
1440
c.remove_from_connection()
1137
1441
# Don't signal anything except ClientRemoved
1138
c.use_dbus = False
1139
c.disable()
1442
c.disable(signal=False)
1140
1443
# Emit D-Bus signal
1141
1444
self.ClientRemoved(object_path, c.name)
1142
1445
return
1144
1447
1145
1448
del _interface
1146
1449
1147
mandos_server = MandosServer()
1450
mandos_dbus_service = MandosDBusService()
1148
1451
1149
for client in clients:
1452
for client in tcp_server.clients:
1150
1453
if use_dbus:
1151
1454
# Emit D-Bus signal
1152
mandos_server.ClientAdded(client.dbus_object_path,
1153
client.GetAllProperties())
1455
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1456
client.GetAllProperties())
1154
1457
client.enable()
1155
1458
1156
1459
tcp_server.enable()
1158
1461
1159
1462
# Find out what port we got
1160
1463
service.port = tcp_server.socket.getsockname()[1]
1161
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1162
u" scope_id %d" % tcp_server.socket.getsockname())
1464
if use_ipv6:
1465
logger.info(u"Now listening on address %r, port %d,"
1466
" flowinfo %d, scope_id %d"
1467
% tcp_server.socket.getsockname())
1468
else: # IPv4
1469
logger.info(u"Now listening on address %r, port %d"
1470
% tcp_server.socket.getsockname())
1163
1471
1164
1472
#service.interface = tcp_server.socket.getsockname()[3]
1165
1473
1166
1474
try:
1167
1475
# From the Avahi example code
1168
server.connect_to_signal("StateChanged", server_state_changed)
1169
1476
try:
1170
server_state_changed(server.GetState())
1477
service.activate()
1171
1478
except dbus.exceptions.DBusException, error:
1172
1479
logger.critical(u"DBusException: %s", error)
1173
1480
sys.exit(1)
1185
1492
sys.exit(1)
1186
1493
except KeyboardInterrupt:
1187
1494
if debug:
1188
print
1495
print >> sys.stderr
1496
logger.debug(u"Server received KeyboardInterrupt")
1497
logger.debug(u"Server exiting")
1189
1498
1190
1499
if __name__ == '__main__':
1191
1500
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0