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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 [%(process)d]: %(levelname)s:'
77
' %(message)s'))
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
u' %(message)s'))
78
89
logger.addHandler(syslogger)
79
90
80
91
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
83
95
logger.addHandler(console)
84
96
85
97
class AvahiError(Exception):
98
110
99
111
class AvahiService(object):
100
112
"""An Avahi (Zeroconf) service.
113
101
114
Attributes:
102
115
interface: integer; avahi.IF_UNSPEC or an interface index.
103
116
Used to optionally bind to the specified interface.
104
name: string; Example: 'Mandos'
105
type: string; Example: '_mandos._tcp'.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
106
119
See <http://www.dns-sd.org/ServiceTypes.html>
107
120
port: integer; what port to announce
108
121
TXT: list of strings; TXT record for the service
111
124
max_renames: integer; maximum number of renames
112
125
rename_count: integer; counter so we only rename after collisions
113
126
a sensible number of times
127
group: D-Bus Entry Group
128
server: D-Bus Server
129
bus: dbus.SystemBus()
114
130
"""
115
131
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
132
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768):
133
domain = u"", host = u"", max_renames = 32768,
134
protocol = avahi.PROTO_UNSPEC, bus = None):
118
135
self.interface = interface
119
136
self.name = name
120
137
self.type = servicetype
124
141
self.host = host
125
142
self.rename_count = 0
126
143
self.max_renames = max_renames
144
self.protocol = protocol
145
self.group = None # our entry group
146
self.server = None
147
self.bus = bus
127
148
def rename(self):
128
149
"""Derived from the Avahi example code"""
129
150
if self.rename_count >= self.max_renames:
131
152
u" after %i retries, exiting.",
132
153
self.rename_count)
133
154
raise AvahiServiceError(u"Too many renames")
134
self.name = server.GetAlternativeServiceName(self.name)
155
self.name = self.server.GetAlternativeServiceName(self.name)
135
156
logger.info(u"Changing Zeroconf service name to %r ...",
136
str(self.name))
157
unicode(self.name))
137
158
syslogger.setFormatter(logging.Formatter
138
('Mandos (%s): %%(levelname)s:'
139
' %%(message)s' % self.name))
159
(u'Mandos (%s) [%%(process)d]:'
160
u' %%(levelname)s: %%(message)s'
161
% self.name))
140
162
self.remove()
141
163
self.add()
142
164
self.rename_count += 1
143
165
def remove(self):
144
166
"""Derived from the Avahi example code"""
145
if group is not None:
146
group.Reset()
167
if self.group is not None:
168
self.group.Reset()
147
169
def add(self):
148
170
"""Derived from the Avahi example code"""
149
global group
150
if group is None:
151
group = dbus.Interface(bus.get_object
152
(avahi.DBUS_NAME,
153
server.EntryGroupNew()),
154
avahi.DBUS_INTERFACE_ENTRY_GROUP)
155
group.connect_to_signal('StateChanged',
156
entry_group_state_changed)
171
if self.group is None:
172
self.group = dbus.Interface(
173
self.bus.get_object(avahi.DBUS_NAME,
174
self.server.EntryGroupNew()),
175
avahi.DBUS_INTERFACE_ENTRY_GROUP)
176
self.group.connect_to_signal('StateChanged',
177
self.entry_group_state_changed)
157
178
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
158
service.name, service.type)
159
group.AddService(
160
self.interface, # interface
161
avahi.PROTO_INET6, # protocol
162
dbus.UInt32(0), # flags
163
self.name, self.type,
164
self.domain, self.host,
165
dbus.UInt16(self.port),
166
avahi.string_array_to_txt_array(self.TXT))
167
group.Commit()
168
169
# From the Avahi example code:
170
group = None # our entry group
171
# End of Avahi example code
172
173
174
def _datetime_to_dbus(dt, variant_level=0):
175
"""Convert a UTC datetime.datetime() to a D-Bus type."""
176
return dbus.String(dt.isoformat(), variant_level=variant_level)
177
178
179
class Client(dbus.service.Object):
179
self.name, self.type)
180
self.group.AddService(
181
self.interface,
182
self.protocol,
183
dbus.UInt32(0), # flags
184
self.name, self.type,
185
self.domain, self.host,
186
dbus.UInt16(self.port),
187
avahi.string_array_to_txt_array(self.TXT))
188
self.group.Commit()
189
def entry_group_state_changed(self, state, error):
190
"""Derived from the Avahi example code"""
191
logger.debug(u"Avahi state change: %i", state)
192
193
if state == avahi.ENTRY_GROUP_ESTABLISHED:
194
logger.debug(u"Zeroconf service established.")
195
elif state == avahi.ENTRY_GROUP_COLLISION:
196
logger.warning(u"Zeroconf service name collision.")
197
self.rename()
198
elif state == avahi.ENTRY_GROUP_FAILURE:
199
logger.critical(u"Avahi: Error in group state changed %s",
200
unicode(error))
201
raise AvahiGroupError(u"State changed: %s"
202
% unicode(error))
203
def cleanup(self):
204
"""Derived from the Avahi example code"""
205
if self.group is not None:
206
self.group.Free()
207
self.group = None
208
def server_state_changed(self, state):
209
"""Derived from the Avahi example code"""
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
212
self.remove()
213
elif state == avahi.SERVER_RUNNING:
214
self.add()
215
def activate(self):
216
"""Derived from the Avahi example code"""
217
if self.server is None:
218
self.server = dbus.Interface(
219
self.bus.get_object(avahi.DBUS_NAME,
220
avahi.DBUS_PATH_SERVER),
221
avahi.DBUS_INTERFACE_SERVER)
222
self.server.connect_to_signal(u"StateChanged",
223
self.server_state_changed)
224
self.server_state_changed(self.server.GetState())
225
226
227
class Client(object):
180
228
"""A representation of a client host served by this server.
229
181
230
Attributes:
182
231
name: string; from the config file, used in log messages and
183
232
D-Bus identifiers
203
252
client lives. %() expansions are done at
204
253
runtime with vars(self) as dict, so that for
205
254
instance %(name)s can be used in the command.
206
use_dbus: bool(); Whether to provide D-Bus interface and signals
207
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
255
current_checker_command: string; current running checker_command
208
256
"""
257
258
@staticmethod
259
def _datetime_to_milliseconds(dt):
260
"Convert a datetime.datetime() to milliseconds"
261
return ((dt.days * 24 * 60 * 60 * 1000)
262
+ (dt.seconds * 1000)
263
+ (dt.microseconds // 1000))
264
209
265
def timeout_milliseconds(self):
210
266
"Return the 'timeout' attribute in milliseconds"
211
return ((self.timeout.days * 24 * 60 * 60 * 1000)
212
+ (self.timeout.seconds * 1000)
213
+ (self.timeout.microseconds // 1000))
267
return self._datetime_to_milliseconds(self.timeout)
214
268
215
269
def interval_milliseconds(self):
216
270
"Return the 'interval' attribute in milliseconds"
217
return ((self.interval.days * 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds * 1000)
219
+ (self.interval.microseconds // 1000))
271
return self._datetime_to_milliseconds(self.interval)
220
272
221
def __init__(self, name = None, disable_hook=None, config=None,
222
use_dbus=True):
273
def __init__(self, name = None, disable_hook=None, config=None):
223
274
"""Note: the 'checker' key in 'config' sets the
224
275
'checker_command' attribute and *not* the 'checker'
225
276
attribute."""
227
278
if config is None:
228
279
config = {}
229
280
logger.debug(u"Creating client %r", self.name)
230
self.use_dbus = False # During __init__
231
281
# Uppercase and remove spaces from fingerprint for later
232
282
# comparison purposes with return value from the fingerprint()
233
283
# function
234
self.fingerprint = (config["fingerprint"].upper()
284
self.fingerprint = (config[u"fingerprint"].upper()
235
285
.replace(u" ", u""))
236
286
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
287
if u"secret" in config:
288
self.secret = config[u"secret"].decode(u"base64")
289
elif u"secfile" in config:
240
290
with closing(open(os.path.expanduser
241
291
(os.path.expandvars
242
(config["secfile"])))) as secfile:
292
(config[u"secfile"])))) as secfile:
243
293
self.secret = secfile.read()
244
294
else:
245
295
raise TypeError(u"No secret or secfile for client %s"
246
296
% self.name)
247
self.host = config.get("host", "")
297
self.host = config.get(u"host", u"")
248
298
self.created = datetime.datetime.utcnow()
249
299
self.enabled = False
250
300
self.last_enabled = None
251
301
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
254
304
self.disable_hook = disable_hook
255
305
self.checker = None
256
306
self.checker_initiator_tag = None
257
307
self.disable_initiator_tag = None
258
308
self.checker_callback_tag = None
259
self.checker_command = config["checker"]
309
self.checker_command = config[u"checker"]
310
self.current_checker_command = None
260
311
self.last_connect = None
261
# Only now, when this client is initialized, can it show up on
262
# the D-Bus
263
self.use_dbus = use_dbus
264
if self.use_dbus:
265
self.dbus_object_path = (dbus.ObjectPath
266
("/clients/"
267
+ self.name.replace(".", "_")))
268
dbus.service.Object.__init__(self, bus,
269
self.dbus_object_path)
270
312
271
313
def enable(self):
272
314
"""Start this client's checker and timeout hooks"""
315
if getattr(self, u"enabled", False):
316
# Already enabled
317
return
273
318
self.last_enabled = datetime.datetime.utcnow()
274
319
# Schedule a new checker to be started an 'interval' from now,
275
320
# and every interval from then on.
283
328
(self.timeout_milliseconds(),
284
329
self.disable))
285
330
self.enabled = True
286
if self.use_dbus:
287
# Emit D-Bus signals
288
self.PropertyChanged(dbus.String(u"enabled"),
289
dbus.Boolean(True, variant_level=1))
290
self.PropertyChanged(dbus.String(u"last_enabled"),
291
(_datetime_to_dbus(self.last_enabled,
292
variant_level=1)))
293
331
294
332
def disable(self):
295
333
"""Disable this client."""
296
334
if not getattr(self, "enabled", False):
297
335
return False
298
336
logger.info(u"Disabling client %s", self.name)
299
if getattr(self, "disable_initiator_tag", False):
337
if getattr(self, u"disable_initiator_tag", False):
300
338
gobject.source_remove(self.disable_initiator_tag)
301
339
self.disable_initiator_tag = None
302
if getattr(self, "checker_initiator_tag", False):
340
if getattr(self, u"checker_initiator_tag", False):
303
341
gobject.source_remove(self.checker_initiator_tag)
304
342
self.checker_initiator_tag = None
305
343
self.stop_checker()
306
344
if self.disable_hook:
307
345
self.disable_hook(self)
308
346
self.enabled = False
309
if self.use_dbus:
310
# Emit D-Bus signal
311
self.PropertyChanged(dbus.String(u"enabled"),
312
dbus.Boolean(False, variant_level=1))
313
347
# Do not run this again if called by a gobject.timeout_add
314
348
return False
315
349
321
355
"""The checker has completed, so take appropriate actions."""
322
356
self.checker_callback_tag = None
323
357
self.checker = None
324
if self.use_dbus:
325
# Emit D-Bus signal
326
self.PropertyChanged(dbus.String(u"checker_running"),
327
dbus.Boolean(False, variant_level=1))
328
358
if os.WIFEXITED(condition):
329
359
exitstatus = os.WEXITSTATUS(condition)
330
360
if exitstatus == 0:
334
364
else:
335
365
logger.info(u"Checker for %(name)s failed",
336
366
vars(self))
337
if self.use_dbus:
338
# Emit D-Bus signal
339
self.CheckerCompleted(dbus.Int16(exitstatus),
340
dbus.Int64(condition),
341
dbus.String(command))
342
367
else:
343
368
logger.warning(u"Checker for %(name)s crashed?",
344
369
vars(self))
345
if self.use_dbus:
346
# Emit D-Bus signal
347
self.CheckerCompleted(dbus.Int16(-1),
348
dbus.Int64(condition),
349
dbus.String(command))
350
370
351
371
def checked_ok(self):
352
372
"""Bump up the timeout for this client.
373
353
374
This should only be called when the client has been seen,
354
375
alive and well.
355
376
"""
358
379
self.disable_initiator_tag = (gobject.timeout_add
359
380
(self.timeout_milliseconds(),
360
381
self.disable))
361
if self.use_dbus:
362
# Emit D-Bus signal
363
self.PropertyChanged(
364
dbus.String(u"last_checked_ok"),
365
(_datetime_to_dbus(self.last_checked_ok,
366
variant_level=1)))
367
382
368
383
def start_checker(self):
369
384
"""Start a new checker subprocess if one is not running.
385
370
386
If a checker already exists, leave it running and do
371
387
nothing."""
372
388
# The reason for not killing a running checker is that if we
377
393
# checkers alone, the checker would have to take more time
378
394
# than 'timeout' for the client to be declared invalid, which
379
395
# is as it should be.
396
397
# If a checker exists, make sure it is not a zombie
398
if self.checker is not None:
399
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
400
if pid:
401
logger.warning(u"Checker was a zombie")
402
gobject.source_remove(self.checker_callback_tag)
403
self.checker_callback(pid, status,
404
self.current_checker_command)
405
# Start a new checker if needed
380
406
if self.checker is None:
381
407
try:
382
408
# In case checker_command has exactly one % operator
383
409
command = self.checker_command % self.host
384
410
except TypeError:
385
411
# Escape attributes for the shell
386
escaped_attrs = dict((key, re.escape(str(val)))
412
escaped_attrs = dict((key,
413
re.escape(unicode(str(val),
414
errors=
415
u'replace')))
387
416
for key, val in
388
417
vars(self).iteritems())
389
418
try:
392
421
logger.error(u'Could not format string "%s":'
393
422
u' %s', self.checker_command, error)
394
423
return True # Try again later
424
self.current_checker_command = command
395
425
try:
396
426
logger.info(u"Starting checker %r for %s",
397
427
command, self.name)
401
431
# always replaced by /dev/null.)
402
432
self.checker = subprocess.Popen(command,
403
433
close_fds=True,
404
shell=True, cwd="/")
405
if self.use_dbus:
406
# Emit D-Bus signal
407
self.CheckerStarted(command)
408
self.PropertyChanged(
409
dbus.String("checker_running"),
410
dbus.Boolean(True, variant_level=1))
434
shell=True, cwd=u"/")
411
435
self.checker_callback_tag = (gobject.child_watch_add
412
436
(self.checker.pid,
413
437
self.checker_callback,
414
438
data=command))
439
# The checker may have completed before the gobject
440
# watch was added. Check for this.
441
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
442
if pid:
443
gobject.source_remove(self.checker_callback_tag)
444
self.checker_callback(pid, status, command)
415
445
except OSError, error:
416
446
logger.error(u"Failed to start subprocess: %s",
417
447
error)
423
453
if self.checker_callback_tag:
424
454
gobject.source_remove(self.checker_callback_tag)
425
455
self.checker_callback_tag = None
426
if getattr(self, "checker", None) is None:
456
if getattr(self, u"checker", None) is None:
427
457
return
428
458
logger.debug(u"Stopping checker for %(name)s", vars(self))
429
459
try:
435
465
if error.errno != errno.ESRCH: # No such process
436
466
raise
437
467
self.checker = None
438
if self.use_dbus:
439
self.PropertyChanged(dbus.String(u"checker_running"),
440
dbus.Boolean(False, variant_level=1))
441
468
442
469
def still_valid(self):
443
470
"""Has the timeout not yet passed for this client?"""
444
if not getattr(self, "enabled", False):
471
if not getattr(self, u"enabled", False):
445
472
return False
446
473
now = datetime.datetime.utcnow()
447
474
if self.last_checked_ok is None:
448
475
return now < (self.created + self.timeout)
449
476
else:
450
477
return now < (self.last_checked_ok + self.timeout)
478
479
480
class ClientDBus(Client, dbus.service.Object):
481
"""A Client class using D-Bus
482
483
Attributes:
484
dbus_object_path: dbus.ObjectPath
485
bus: dbus.SystemBus()
486
"""
487
# dbus.service.Object doesn't use super(), so we can't either.
488
489
def __init__(self, bus = None, *args, **kwargs):
490
self.bus = bus
491
Client.__init__(self, *args, **kwargs)
492
# Only now, when this client is initialized, can it show up on
493
# the D-Bus
494
self.dbus_object_path = (dbus.ObjectPath
495
(u"/clients/"
496
+ self.name.replace(u".", u"_")))
497
dbus.service.Object.__init__(self, self.bus,
498
self.dbus_object_path)
499
500
@staticmethod
501
def _datetime_to_dbus(dt, variant_level=0):
502
"""Convert a UTC datetime.datetime() to a D-Bus type."""
503
return dbus.String(dt.isoformat(),
504
variant_level=variant_level)
505
506
def enable(self):
507
oldstate = getattr(self, u"enabled", False)
508
r = Client.enable(self)
509
if oldstate != self.enabled:
510
# Emit D-Bus signals
511
self.PropertyChanged(dbus.String(u"enabled"),
512
dbus.Boolean(True, variant_level=1))
513
self.PropertyChanged(
514
dbus.String(u"last_enabled"),
515
self._datetime_to_dbus(self.last_enabled,
516
variant_level=1))
517
return r
518
519
def disable(self, signal = True):
520
oldstate = getattr(self, u"enabled", False)
521
r = Client.disable(self)
522
if signal and oldstate != self.enabled:
523
# Emit D-Bus signal
524
self.PropertyChanged(dbus.String(u"enabled"),
525
dbus.Boolean(False, variant_level=1))
526
return r
527
528
def __del__(self, *args, **kwargs):
529
try:
530
self.remove_from_connection()
531
except LookupError:
532
pass
533
if hasattr(dbus.service.Object, u"__del__"):
534
dbus.service.Object.__del__(self, *args, **kwargs)
535
Client.__del__(self, *args, **kwargs)
536
537
def checker_callback(self, pid, condition, command,
538
*args, **kwargs):
539
self.checker_callback_tag = None
540
self.checker = None
541
# Emit D-Bus signal
542
self.PropertyChanged(dbus.String(u"checker_running"),
543
dbus.Boolean(False, variant_level=1))
544
if os.WIFEXITED(condition):
545
exitstatus = os.WEXITSTATUS(condition)
546
# Emit D-Bus signal
547
self.CheckerCompleted(dbus.Int16(exitstatus),
548
dbus.Int64(condition),
549
dbus.String(command))
550
else:
551
# Emit D-Bus signal
552
self.CheckerCompleted(dbus.Int16(-1),
553
dbus.Int64(condition),
554
dbus.String(command))
555
556
return Client.checker_callback(self, pid, condition, command,
557
*args, **kwargs)
558
559
def checked_ok(self, *args, **kwargs):
560
r = Client.checked_ok(self, *args, **kwargs)
561
# Emit D-Bus signal
562
self.PropertyChanged(
563
dbus.String(u"last_checked_ok"),
564
(self._datetime_to_dbus(self.last_checked_ok,
565
variant_level=1)))
566
return r
567
568
def start_checker(self, *args, **kwargs):
569
old_checker = self.checker
570
if self.checker is not None:
571
old_checker_pid = self.checker.pid
572
else:
573
old_checker_pid = None
574
r = Client.start_checker(self, *args, **kwargs)
575
# Only if new checker process was started
576
if (self.checker is not None
577
and old_checker_pid != self.checker.pid):
578
# Emit D-Bus signal
579
self.CheckerStarted(self.current_checker_command)
580
self.PropertyChanged(
581
dbus.String(u"checker_running"),
582
dbus.Boolean(True, variant_level=1))
583
return r
584
585
def stop_checker(self, *args, **kwargs):
586
old_checker = getattr(self, u"checker", None)
587
r = Client.stop_checker(self, *args, **kwargs)
588
if (old_checker is not None
589
and getattr(self, u"checker", None) is None):
590
self.PropertyChanged(dbus.String(u"checker_running"),
591
dbus.Boolean(False, variant_level=1))
592
return r
451
593
452
594
## D-Bus methods & signals
453
595
_interface = u"se.bsnet.fukt.Mandos.Client"
454
596
455
597
# CheckedOK - method
456
CheckedOK = dbus.service.method(_interface)(checked_ok)
457
CheckedOK.__name__ = "CheckedOK"
598
@dbus.service.method(_interface)
599
def CheckedOK(self):
600
return self.checked_ok()
458
601
459
602
# CheckerCompleted - signal
460
@dbus.service.signal(_interface, signature="nxs")
603
@dbus.service.signal(_interface, signature=u"nxs")
461
604
def CheckerCompleted(self, exitcode, waitstatus, command):
462
605
"D-Bus signal"
463
606
pass
464
607
465
608
# CheckerStarted - signal
466
@dbus.service.signal(_interface, signature="s")
609
@dbus.service.signal(_interface, signature=u"s")
467
610
def CheckerStarted(self, command):
468
611
"D-Bus signal"
469
612
pass
470
613
471
614
# GetAllProperties - method
472
@dbus.service.method(_interface, out_signature="a{sv}")
615
@dbus.service.method(_interface, out_signature=u"a{sv}")
473
616
def GetAllProperties(self):
474
617
"D-Bus method"
475
618
return dbus.Dictionary({
476
dbus.String("name"):
619
dbus.String(u"name"):
477
620
dbus.String(self.name, variant_level=1),
478
dbus.String("fingerprint"):
621
dbus.String(u"fingerprint"):
479
622
dbus.String(self.fingerprint, variant_level=1),
480
dbus.String("host"):
623
dbus.String(u"host"):
481
624
dbus.String(self.host, variant_level=1),
482
dbus.String("created"):
483
_datetime_to_dbus(self.created, variant_level=1),
484
dbus.String("last_enabled"):
485
(_datetime_to_dbus(self.last_enabled,
486
variant_level=1)
625
dbus.String(u"created"):
626
self._datetime_to_dbus(self.created,
627
variant_level=1),
628
dbus.String(u"last_enabled"):
629
(self._datetime_to_dbus(self.last_enabled,
630
variant_level=1)
487
631
if self.last_enabled is not None
488
632
else dbus.Boolean(False, variant_level=1)),
489
dbus.String("enabled"):
633
dbus.String(u"enabled"):
490
634
dbus.Boolean(self.enabled, variant_level=1),
491
dbus.String("last_checked_ok"):
492
(_datetime_to_dbus(self.last_checked_ok,
493
variant_level=1)
635
dbus.String(u"last_checked_ok"):
636
(self._datetime_to_dbus(self.last_checked_ok,
637
variant_level=1)
494
638
if self.last_checked_ok is not None
495
639
else dbus.Boolean (False, variant_level=1)),
496
dbus.String("timeout"):
640
dbus.String(u"timeout"):
497
641
dbus.UInt64(self.timeout_milliseconds(),
498
642
variant_level=1),
499
dbus.String("interval"):
643
dbus.String(u"interval"):
500
644
dbus.UInt64(self.interval_milliseconds(),
501
645
variant_level=1),
502
dbus.String("checker"):
646
dbus.String(u"checker"):
503
647
dbus.String(self.checker_command,
504
648
variant_level=1),
505
dbus.String("checker_running"):
649
dbus.String(u"checker_running"):
506
650
dbus.Boolean(self.checker is not None,
507
651
variant_level=1),
508
dbus.String("object_path"):
652
dbus.String(u"object_path"):
509
653
dbus.ObjectPath(self.dbus_object_path,
510
654
variant_level=1)
511
}, signature="sv")
655
}, signature=u"sv")
512
656
513
657
# IsStillValid - method
514
IsStillValid = (dbus.service.method(_interface, out_signature="b")
515
(still_valid))
516
IsStillValid.__name__ = "IsStillValid"
658
@dbus.service.method(_interface, out_signature=u"b")
659
def IsStillValid(self):
660
return self.still_valid()
517
661
518
662
# PropertyChanged - signal
519
@dbus.service.signal(_interface, signature="sv")
663
@dbus.service.signal(_interface, signature=u"sv")
520
664
def PropertyChanged(self, property, value):
521
665
"D-Bus signal"
522
666
pass
523
667
668
# ReceivedSecret - signal
669
@dbus.service.signal(_interface)
670
def ReceivedSecret(self):
671
"D-Bus signal"
672
pass
673
674
# Rejected - signal
675
@dbus.service.signal(_interface)
676
def Rejected(self):
677
"D-Bus signal"
678
pass
679
524
680
# SetChecker - method
525
@dbus.service.method(_interface, in_signature="s")
681
@dbus.service.method(_interface, in_signature=u"s")
526
682
def SetChecker(self, checker):
527
683
"D-Bus setter method"
528
684
self.checker_command = checker
532
688
variant_level=1))
533
689
534
690
# SetHost - method
535
@dbus.service.method(_interface, in_signature="s")
691
@dbus.service.method(_interface, in_signature=u"s")
536
692
def SetHost(self, host):
537
693
"D-Bus setter method"
538
694
self.host = host
541
697
dbus.String(self.host, variant_level=1))
542
698
543
699
# SetInterval - method
544
@dbus.service.method(_interface, in_signature="t")
700
@dbus.service.method(_interface, in_signature=u"t")
545
701
def SetInterval(self, milliseconds):
546
702
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
547
703
# Emit D-Bus signal
550
706
variant_level=1)))
551
707
552
708
# SetSecret - method
553
@dbus.service.method(_interface, in_signature="ay",
709
@dbus.service.method(_interface, in_signature=u"ay",
554
710
byte_arrays=True)
555
711
def SetSecret(self, secret):
556
712
"D-Bus setter method"
557
713
self.secret = str(secret)
558
714
559
715
# SetTimeout - method
560
@dbus.service.method(_interface, in_signature="t")
716
@dbus.service.method(_interface, in_signature=u"t")
561
717
def SetTimeout(self, milliseconds):
562
718
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
563
719
# Emit D-Bus signal
566
722
variant_level=1)))
567
723
568
724
# Enable - method
569
Enable = dbus.service.method(_interface)(enable)
570
Enable.__name__ = "Enable"
725
@dbus.service.method(_interface)
726
def Enable(self):
727
"D-Bus method"
728
self.enable()
571
729
572
730
# StartChecker - method
573
731
@dbus.service.method(_interface)
582
740
self.disable()
583
741
584
742
# StopChecker - method
585
StopChecker = dbus.service.method(_interface)(stop_checker)
586
StopChecker.__name__ = "StopChecker"
743
@dbus.service.method(_interface)
744
def StopChecker(self):
745
self.stop_checker()
587
746
588
747
del _interface
589
748
590
749
591
def peer_certificate(session):
592
"Return the peer's OpenPGP certificate as a bytestring"
593
# If not an OpenPGP certificate...
594
if (gnutls.library.functions
595
.gnutls_certificate_type_get(session._c_object)
596
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
597
# ...do the normal thing
598
return session.peer_certificate
599
list_size = ctypes.c_uint(1)
600
cert_list = (gnutls.library.functions
601
.gnutls_certificate_get_peers
602
(session._c_object, ctypes.byref(list_size)))
603
if not bool(cert_list) and list_size.value != 0:
604
raise gnutls.errors.GNUTLSError("error getting peer"
605
" certificate")
606
if list_size.value == 0:
607
return None
608
cert = cert_list[0]
609
return ctypes.string_at(cert.data, cert.size)
610
611
612
def fingerprint(openpgp):
613
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
614
# New GnuTLS "datum" with the OpenPGP public key
615
datum = (gnutls.library.types
616
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
617
ctypes.POINTER
618
(ctypes.c_ubyte)),
619
ctypes.c_uint(len(openpgp))))
620
# New empty GnuTLS certificate
621
crt = gnutls.library.types.gnutls_openpgp_crt_t()
622
(gnutls.library.functions
623
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
624
# Import the OpenPGP public key into the certificate
625
(gnutls.library.functions
626
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
627
gnutls.library.constants
628
.GNUTLS_OPENPGP_FMT_RAW))
629
# Verify the self signature in the key
630
crtverify = ctypes.c_uint()
631
(gnutls.library.functions
632
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
633
if crtverify.value != 0:
634
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
635
raise gnutls.errors.CertificateSecurityError("Verify failed")
636
# New buffer for the fingerprint
637
buf = ctypes.create_string_buffer(20)
638
buf_len = ctypes.c_size_t()
639
# Get the fingerprint from the certificate into the buffer
640
(gnutls.library.functions
641
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
642
ctypes.byref(buf_len)))
643
# Deinit the certificate
644
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
645
# Convert the buffer to a Python bytestring
646
fpr = ctypes.string_at(buf, buf_len.value)
647
# Convert the bytestring to hexadecimal notation
648
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
649
return hex_fpr
650
651
652
class TCP_handler(SocketServer.BaseRequestHandler, object):
653
"""A TCP request handler class.
654
Instantiated by IPv6_TCPServer for each request to handle it.
750
class ClientHandler(socketserver.BaseRequestHandler, object):
751
"""A class to handle client connections.
752
753
Instantiated once for each connection to handle it.
655
754
Note: This will run in its own forked process."""
656
755
657
756
def handle(self):
658
757
logger.info(u"TCP connection from: %s",
659
758
unicode(self.client_address))
660
session = (gnutls.connection
661
.ClientSession(self.request,
662
gnutls.connection
663
.X509Credentials()))
664
665
line = self.request.makefile().readline()
666
logger.debug(u"Protocol version: %r", line)
667
try:
668
if int(line.strip().split()[0]) > 1:
669
raise RuntimeError
670
except (ValueError, IndexError, RuntimeError), error:
671
logger.error(u"Unknown protocol version: %s", error)
672
return
673
674
# Note: gnutls.connection.X509Credentials is really a generic
675
# GnuTLS certificate credentials object so long as no X.509
676
# keys are added to it. Therefore, we can use it here despite
677
# using OpenPGP certificates.
678
679
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
680
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
681
# "+DHE-DSS"))
682
# Use a fallback default, since this MUST be set.
683
priority = self.server.settings.get("priority", "NORMAL")
684
(gnutls.library.functions
685
.gnutls_priority_set_direct(session._c_object,
686
priority, None))
687
688
try:
689
session.handshake()
690
except gnutls.errors.GNUTLSError, error:
691
logger.warning(u"Handshake failed: %s", error)
692
# Do not run session.bye() here: the session is not
693
# established. Just abandon the request.
694
return
695
logger.debug(u"Handshake succeeded")
696
try:
697
fpr = fingerprint(peer_certificate(session))
698
except (TypeError, gnutls.errors.GNUTLSError), error:
699
logger.warning(u"Bad certificate: %s", error)
700
session.bye()
701
return
702
logger.debug(u"Fingerprint: %s", fpr)
703
704
for c in self.server.clients:
705
if c.fingerprint == fpr:
706
client = c
707
break
708
else:
709
logger.warning(u"Client not found for fingerprint: %s",
710
fpr)
711
session.bye()
712
return
713
# Have to check if client.still_valid(), since it is possible
714
# that the client timed out while establishing the GnuTLS
715
# session.
716
if not client.still_valid():
717
logger.warning(u"Client %(name)s is invalid",
718
vars(client))
719
session.bye()
720
return
721
## This won't work here, since we're in a fork.
722
# client.checked_ok()
723
sent_size = 0
724
while sent_size < len(client.secret):
725
sent = session.send(client.secret[sent_size:])
726
logger.debug(u"Sent: %d, remaining: %d",
727
sent, len(client.secret)
728
- (sent_size + sent))
729
sent_size += sent
730
session.bye()
731
732
733
class IPv6_TCPServer(SocketServer.ForkingMixIn,
734
SocketServer.TCPServer, object):
735
"""IPv6 TCP server. Accepts 'None' as address and/or port.
759
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
760
# Open IPC pipe to parent process
761
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
762
session = (gnutls.connection
763
.ClientSession(self.request,
764
gnutls.connection
765
.X509Credentials()))
766
767
line = self.request.makefile().readline()
768
logger.debug(u"Protocol version: %r", line)
769
try:
770
if int(line.strip().split()[0]) > 1:
771
raise RuntimeError
772
except (ValueError, IndexError, RuntimeError), error:
773
logger.error(u"Unknown protocol version: %s", error)
774
return
775
776
# Note: gnutls.connection.X509Credentials is really a
777
# generic GnuTLS certificate credentials object so long as
778
# no X.509 keys are added to it. Therefore, we can use it
779
# here despite using OpenPGP certificates.
780
781
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
782
# u"+AES-256-CBC", u"+SHA1",
783
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
784
# u"+DHE-DSS"))
785
# Use a fallback default, since this MUST be set.
786
priority = self.server.gnutls_priority
787
if priority is None:
788
priority = u"NORMAL"
789
(gnutls.library.functions
790
.gnutls_priority_set_direct(session._c_object,
791
priority, None))
792
793
try:
794
session.handshake()
795
except gnutls.errors.GNUTLSError, error:
796
logger.warning(u"Handshake failed: %s", error)
797
# Do not run session.bye() here: the session is not
798
# established. Just abandon the request.
799
return
800
logger.debug(u"Handshake succeeded")
801
try:
802
fpr = self.fingerprint(self.peer_certificate(session))
803
except (TypeError, gnutls.errors.GNUTLSError), error:
804
logger.warning(u"Bad certificate: %s", error)
805
session.bye()
806
return
807
logger.debug(u"Fingerprint: %s", fpr)
808
809
for c in self.server.clients:
810
if c.fingerprint == fpr:
811
client = c
812
break
813
else:
814
ipc.write(u"NOTFOUND %s\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
736
919
Attributes:
737
settings: Server settings
738
clients: Set() of Client objects
739
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
740
923
"""
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)
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)
751
931
def server_bind(self):
752
932
"""This overrides the normal server_bind() function
753
933
to bind to an interface if one was specified, and also NOT to
754
934
bind to an address or port if they were not specified."""
755
if self.settings["interface"]:
756
# 25 is from /usr/include/asm-i486/socket.h
757
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
758
try:
759
self.socket.setsockopt(socket.SOL_SOCKET,
760
SO_BINDTODEVICE,
761
self.settings["interface"])
762
except socket.error, error:
763
if error[0] == errno.EPERM:
764
logger.error(u"No permission to"
765
u" bind to interface %s",
766
self.settings["interface"])
767
else:
768
raise
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
769
957
# Only bind(2) the socket if we really need to.
770
958
if self.server_address[0] or self.server_address[1]:
771
959
if not self.server_address[0]:
772
in6addr_any = "::"
773
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,
774
965
self.server_address[1])
775
966
elif not self.server_address[1]:
776
967
self.server_address = (self.server_address[0],
777
968
0)
778
# if self.settings["interface"]:
969
# if self.interface:
779
970
# self.server_address = (self.server_address[0],
780
971
# 0, # port
781
972
# 0, # flowinfo
782
973
# if_nametoindex
783
# (self.settings
784
# ["interface"]))
785
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)
786
1004
def server_activate(self):
787
1005
if self.enabled:
788
return super(IPv6_TCPServer, self).server_activate()
1006
return socketserver.TCPServer.server_activate(self)
789
1007
def enable(self):
790
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
791
1083
792
1084
793
1085
def string_to_delta(interval):
794
1086
"""Parse a string and return a datetime.timedelta
795
1087
796
>>> string_to_delta('7d')
1088
>>> string_to_delta(u'7d')
797
1089
datetime.timedelta(7)
798
>>> string_to_delta('60s')
1090
>>> string_to_delta(u'60s')
799
1091
datetime.timedelta(0, 60)
800
>>> string_to_delta('60m')
1092
>>> string_to_delta(u'60m')
801
1093
datetime.timedelta(0, 3600)
802
>>> string_to_delta('24h')
1094
>>> string_to_delta(u'24h')
803
1095
datetime.timedelta(1)
804
1096
>>> string_to_delta(u'1w')
805
1097
datetime.timedelta(7)
806
>>> string_to_delta('5m 30s')
1098
>>> string_to_delta(u'5m 30s')
807
1099
datetime.timedelta(0, 330)
808
1100
"""
809
1101
timevalue = datetime.timedelta(0)
829
1121
return timevalue
830
1122
831
1123
832
def server_state_changed(state):
833
"""Derived from the Avahi example code"""
834
if state == avahi.SERVER_COLLISION:
835
logger.error(u"Zeroconf server name collision")
836
service.remove()
837
elif state == avahi.SERVER_RUNNING:
838
service.add()
839
840
841
def entry_group_state_changed(state, error):
842
"""Derived from the Avahi example code"""
843
logger.debug(u"Avahi state change: %i", state)
844
845
if state == avahi.ENTRY_GROUP_ESTABLISHED:
846
logger.debug(u"Zeroconf service established.")
847
elif state == avahi.ENTRY_GROUP_COLLISION:
848
logger.warning(u"Zeroconf service name collision.")
849
service.rename()
850
elif state == avahi.ENTRY_GROUP_FAILURE:
851
logger.critical(u"Avahi: Error in group state changed %s",
852
unicode(error))
853
raise AvahiGroupError(u"State changed: %s" % unicode(error))
854
855
1124
def if_nametoindex(interface):
856
"""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."""
857
1128
global if_nametoindex
858
1129
try:
859
1130
if_nametoindex = (ctypes.cdll.LoadLibrary
860
(ctypes.util.find_library("c"))
1131
(ctypes.util.find_library(u"c"))
861
1132
.if_nametoindex)
862
1133
except (OSError, AttributeError):
863
if "struct" not in sys.modules:
864
import struct
865
if "fcntl" not in sys.modules:
866
import fcntl
1134
logger.warning(u"Doing if_nametoindex the hard way")
867
1135
def if_nametoindex(interface):
868
1136
"Get an interface index the hard way, i.e. using fcntl()"
869
1137
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
870
1138
with closing(socket.socket()) as s:
871
1139
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
872
struct.pack("16s16x", interface))
873
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]
874
1144
return interface_index
875
1145
return if_nametoindex(interface)
876
1146
877
1147
878
1148
def daemon(nochdir = False, noclose = False):
879
1149
"""See daemon(3). Standard BSD Unix function.
1150
880
1151
This should really exist as os.daemon, but it doesn't (yet)."""
881
1152
if os.fork():
882
1153
sys.exit()
883
1154
os.setsid()
884
1155
if not nochdir:
885
os.chdir("/")
1156
os.chdir(u"/")
886
1157
if os.fork():
887
1158
sys.exit()
888
1159
if not noclose:
890
1161
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
891
1162
if not stat.S_ISCHR(os.fstat(null).st_mode):
892
1163
raise OSError(errno.ENODEV,
893
"/dev/null not a character device")
1164
u"/dev/null not a character device")
894
1165
os.dup2(null, sys.stdin.fileno())
895
1166
os.dup2(null, sys.stdout.fileno())
896
1167
os.dup2(null, sys.stderr.fileno())
899
1170
900
1171
901
1172
def main():
1173
1174
######################################################################
1175
# Parsing of options, both command line and config file
1176
902
1177
parser = optparse.OptionParser(version = "%%prog %s" % version)
903
parser.add_option("-i", "--interface", type="string",
904
metavar="IF", help="Bind to interface IF")
905
parser.add_option("-a", "--address", type="string",
906
help="Address to listen for requests on")
907
parser.add_option("-p", "--port", type="int",
908
help="Port number to receive requests on")
909
parser.add_option("--check", action="store_true",
910
help="Run self-test")
911
parser.add_option("--debug", action="store_true",
912
help="Debug mode; run in foreground and log to"
913
" terminal")
914
parser.add_option("--priority", type="string", help="GnuTLS"
915
" priority string (see GnuTLS documentation)")
916
parser.add_option("--servicename", type="string", metavar="NAME",
917
help="Zeroconf service name")
918
parser.add_option("--configdir", type="string",
919
default="/etc/mandos", metavar="DIR",
920
help="Directory to search for configuration"
921
" files")
922
parser.add_option("--no-dbus", action="store_false",
923
dest="use_dbus",
924
help="Do not provide D-Bus system bus"
925
" interface")
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")
926
1202
options = parser.parse_args()[0]
927
1203
928
1204
if options.check:
931
1207
sys.exit()
932
1208
933
1209
# Default values for config file for server-global settings
934
server_defaults = { "interface": "",
935
"address": "",
936
"port": "",
937
"debug": "False",
938
"priority":
939
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
940
"servicename": "Mandos",
941
"use_dbus": "True",
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",
942
1219
}
943
1220
944
1221
# Parse config file for server-global settings
945
server_config = ConfigParser.SafeConfigParser(server_defaults)
1222
server_config = configparser.SafeConfigParser(server_defaults)
946
1223
del server_defaults
947
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1224
server_config.read(os.path.join(options.configdir,
1225
u"mandos.conf"))
948
1226
# Convert the SafeConfigParser object to a dict
949
1227
server_settings = server_config.defaults()
950
1228
# Use the appropriate methods on the non-string config options
951
server_settings["debug"] = server_config.getboolean("DEFAULT",
952
"debug")
953
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
954
"use_dbus")
1229
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1230
server_settings[option] = server_config.getboolean(u"DEFAULT",
1231
option)
955
1232
if server_settings["port"]:
956
server_settings["port"] = server_config.getint("DEFAULT",
957
"port")
1233
server_settings["port"] = server_config.getint(u"DEFAULT",
1234
u"port")
958
1235
del server_config
959
1236
960
1237
# Override the settings from the config file with command line
961
1238
# options, if set.
962
for option in ("interface", "address", "port", "debug",
963
"priority", "servicename", "configdir",
964
"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"):
965
1242
value = getattr(options, option)
966
1243
if value is not None:
967
1244
server_settings[option] = value
968
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])
969
1250
# Now we have our good server settings in "server_settings"
970
1251
1252
##################################################################
1253
971
1254
# For convenience
972
debug = server_settings["debug"]
973
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"]
974
1258
975
1259
if not debug:
976
1260
syslogger.setLevel(logging.WARNING)
977
1261
console.setLevel(logging.WARNING)
978
1262
979
if server_settings["servicename"] != "Mandos":
1263
if server_settings[u"servicename"] != u"Mandos":
980
1264
syslogger.setFormatter(logging.Formatter
981
('Mandos (%s): %%(levelname)s:'
982
' %%(message)s'
983
% server_settings["servicename"]))
1265
(u'Mandos (%s) [%%(process)d]:'
1266
u' %%(levelname)s: %%(message)s'
1267
% server_settings[u"servicename"]))
984
1268
985
1269
# Parse config file with clients
986
client_defaults = { "timeout": "1h",
987
"interval": "5m",
988
"checker": "fping -q -- %%(host)s",
989
"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"",
990
1274
}
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"
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"
1002
1291
try:
1003
pidfile = open(pidfilename, "w")
1292
pidfile = open(pidfilename, u"w")
1004
1293
except IOError:
1005
logger.error("Could not open file %r", pidfilename)
1294
logger.error(u"Could not open file %r", pidfilename)
1006
1295
1007
1296
try:
1008
uid = pwd.getpwnam("_mandos").pw_uid
1009
gid = pwd.getpwnam("_mandos").pw_gid
1297
uid = pwd.getpwnam(u"_mandos").pw_uid
1298
gid = pwd.getpwnam(u"_mandos").pw_gid
1010
1299
except KeyError:
1011
1300
try:
1012
uid = pwd.getpwnam("mandos").pw_uid
1013
gid = pwd.getpwnam("mandos").pw_gid
1301
uid = pwd.getpwnam(u"mandos").pw_uid
1302
gid = pwd.getpwnam(u"mandos").pw_gid
1014
1303
except KeyError:
1015
1304
try:
1016
uid = pwd.getpwnam("nobody").pw_uid
1017
gid = pwd.getpwnam("nogroup").pw_gid
1305
uid = pwd.getpwnam(u"nobody").pw_uid
1306
gid = pwd.getpwnam(u"nobody").pw_gid
1018
1307
except KeyError:
1019
1308
uid = 65534
1020
1309
gid = 65534
1033
1322
1034
1323
@gnutls.library.types.gnutls_log_func
1035
1324
def debug_gnutls(level, string):
1036
logger.debug("GnuTLS: %s", string[:-1])
1325
logger.debug(u"GnuTLS: %s", string[:-1])
1037
1326
1038
1327
(gnutls.library.functions
1039
1328
.gnutls_global_set_log_function(debug_gnutls))
1040
1329
1041
global service
1042
service = AvahiService(name = server_settings["servicename"],
1043
servicetype = "_mandos._tcp", )
1044
if server_settings["interface"]:
1045
service.interface = (if_nametoindex
1046
(server_settings["interface"]))
1047
1048
1330
global main_loop
1049
global bus
1050
global server
1051
1331
# From the Avahi example code
1052
1332
DBusGMainLoop(set_as_default=True )
1053
1333
main_loop = gobject.MainLoop()
1054
1334
bus = dbus.SystemBus()
1055
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1056
avahi.DBUS_PATH_SERVER),
1057
avahi.DBUS_INTERFACE_SERVER)
1058
1335
# End of Avahi example code
1059
1336
if use_dbus:
1060
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"])))
1061
1345
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:
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:
1068
1354
logger.warning(u"No clients defined")
1069
1355
1070
1356
if debug:
1080
1366
daemon()
1081
1367
1082
1368
try:
1083
pid = os.getpid()
1084
pidfile.write(str(pid) + "\n")
1085
pidfile.close()
1369
with closing(pidfile):
1370
pid = os.getpid()
1371
pidfile.write(str(pid) + "\n")
1086
1372
del pidfile
1087
1373
except IOError:
1088
1374
logger.error(u"Could not write to file %r with PID %d",
1094
1380
1095
1381
def cleanup():
1096
1382
"Cleanup function; run on exit"
1097
global group
1098
# From the Avahi example code
1099
if not group is None:
1100
group.Free()
1101
group = None
1102
# End of Avahi example code
1383
service.cleanup()
1103
1384
1104
while clients:
1105
client = clients.pop()
1385
while tcp_server.clients:
1386
client = tcp_server.clients.pop()
1106
1387
client.disable_hook = None
1107
1388
client.disable()
1108
1389
1114
1395
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1115
1396
1116
1397
if use_dbus:
1117
class MandosServer(dbus.service.Object):
1398
class MandosDBusService(dbus.service.Object):
1118
1399
"""A D-Bus proxy object"""
1119
1400
def __init__(self):
1120
dbus.service.Object.__init__(self, bus, "/")
1401
dbus.service.Object.__init__(self, bus, u"/")
1121
1402
_interface = u"se.bsnet.fukt.Mandos"
1122
1403
1123
@dbus.service.signal(_interface, signature="oa{sv}")
1404
@dbus.service.signal(_interface, signature=u"oa{sv}")
1124
1405
def ClientAdded(self, objpath, properties):
1125
1406
"D-Bus signal"
1126
1407
pass
1127
1408
1128
@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")
1129
1415
def ClientRemoved(self, objpath, name):
1130
1416
"D-Bus signal"
1131
1417
pass
1132
1418
1133
@dbus.service.method(_interface, out_signature="ao")
1419
@dbus.service.method(_interface, out_signature=u"ao")
1134
1420
def GetAllClients(self):
1135
1421
"D-Bus method"
1136
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)
1137
1424
1138
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1425
@dbus.service.method(_interface,
1426
out_signature=u"a{oa{sv}}")
1139
1427
def GetAllClientsWithProperties(self):
1140
1428
"D-Bus method"
1141
1429
return dbus.Dictionary(
1142
1430
((c.dbus_object_path, c.GetAllProperties())
1143
for c in clients),
1144
signature="oa{sv}")
1431
for c in tcp_server.clients),
1432
signature=u"oa{sv}")
1145
1433
1146
@dbus.service.method(_interface, in_signature="o")
1434
@dbus.service.method(_interface, in_signature=u"o")
1147
1435
def RemoveClient(self, object_path):
1148
1436
"D-Bus method"
1149
for c in clients:
1437
for c in tcp_server.clients:
1150
1438
if c.dbus_object_path == object_path:
1151
clients.remove(c)
1439
tcp_server.clients.remove(c)
1440
c.remove_from_connection()
1152
1441
# Don't signal anything except ClientRemoved
1153
c.use_dbus = False
1154
c.disable()
1442
c.disable(signal=False)
1155
1443
# Emit D-Bus signal
1156
1444
self.ClientRemoved(object_path, c.name)
1157
1445
return
1159
1447
1160
1448
del _interface
1161
1449
1162
mandos_server = MandosServer()
1450
mandos_dbus_service = MandosDBusService()
1163
1451
1164
for client in clients:
1452
for client in tcp_server.clients:
1165
1453
if use_dbus:
1166
1454
# Emit D-Bus signal
1167
mandos_server.ClientAdded(client.dbus_object_path,
1168
client.GetAllProperties())
1455
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1456
client.GetAllProperties())
1169
1457
client.enable()
1170
1458
1171
1459
tcp_server.enable()
1173
1461
1174
1462
# Find out what port we got
1175
1463
service.port = tcp_server.socket.getsockname()[1]
1176
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1177
u" scope_id %d" % tcp_server.socket.getsockname())
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())
1178
1471
1179
1472
#service.interface = tcp_server.socket.getsockname()[3]
1180
1473
1181
1474
try:
1182
1475
# From the Avahi example code
1183
server.connect_to_signal("StateChanged", server_state_changed)
1184
1476
try:
1185
server_state_changed(server.GetState())
1477
service.activate()
1186
1478
except dbus.exceptions.DBusException, error:
1187
1479
logger.critical(u"DBusException: %s", error)
1188
1480
sys.exit(1)
1201
1493
except KeyboardInterrupt:
1202
1494
if debug:
1203
1495
print >> sys.stderr
1204
logger.debug("Server received KeyboardInterrupt")
1205
logger.debug("Server exiting")
1496
logger.debug(u"Server received KeyboardInterrupt")
1497
logger.debug(u"Server exiting")
1206
1498
1207
1499
if __name__ == '__main__':
1208
1500
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0