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- Committer: Teddy Hogeborn
- Date: 2011-03-08 11:08:35 UTC
- Revision ID: teddy@fukt.bsnet.se-20110308110835-3sh7b314tf7q3o1i
* plugins.d/password-prompt.c (conflict_detection): Check for both
"plymouth" and
"plymouthd".
"plymouth" and
"plymouthd".
- files removed:
- debian/mandos-client.examples
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2013 Teddy Hogeborn
15
# Copyright © 2008-2013 Björn Påhlsson
14
# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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16
#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# along with this program. If not, see
29
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# <http://www.gnu.org/licenses/>.
30
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#
31
# Contact the authors at <mandos@recompile.se>.
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
#
33
33
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
from future_builtins import *
38
39
37
import SocketServer as socketserver
40
38
import socket
41
import argparse
39
import optparse
42
40
import datetime
43
41
import errno
44
42
import gnutls.crypto
64
62
import functools
65
63
import cPickle as pickle
66
64
import multiprocessing
67
import types
68
import binascii
69
import tempfile
70
import itertools
71
import collections
72
65
73
66
import dbus
74
67
import dbus.service
88
81
except ImportError:
89
82
SO_BINDTODEVICE = None
90
83
91
version = "1.6.1"
92
stored_state_file = "clients.pickle"
93
94
logger = logging.getLogger()
84
85
version = "1.2.3"
86
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
95
89
syslogger = (logging.handlers.SysLogHandler
96
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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91
address = str("/dev/log")))
98
99
try:
100
if_nametoindex = (ctypes.cdll.LoadLibrary
101
(ctypes.util.find_library("c"))
102
.if_nametoindex)
103
except (OSError, AttributeError):
104
def if_nametoindex(interface):
105
"Get an interface index the hard way, i.e. using fcntl()"
106
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
107
with contextlib.closing(socket.socket()) as s:
108
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
109
struct.pack(str("16s16x"),
110
interface))
111
interface_index = struct.unpack(str("I"),
112
ifreq[16:20])[0]
113
return interface_index
114
115
116
def initlogger(debug, level=logging.WARNING):
117
"""init logger and add loglevel"""
118
119
syslogger.setFormatter(logging.Formatter
120
('Mandos [%(process)d]: %(levelname)s:'
121
' %(message)s'))
122
logger.addHandler(syslogger)
123
124
if debug:
125
console = logging.StreamHandler()
126
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
127
' [%(process)d]:'
128
' %(levelname)s:'
129
' %(message)s'))
130
logger.addHandler(console)
131
logger.setLevel(level)
132
133
134
class PGPError(Exception):
135
"""Exception if encryption/decryption fails"""
136
pass
137
138
139
class PGPEngine(object):
140
"""A simple class for OpenPGP symmetric encryption & decryption"""
141
def __init__(self):
142
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
143
self.gnupgargs = ['--batch',
144
'--home', self.tempdir,
145
'--force-mdc',
146
'--quiet',
147
'--no-use-agent']
148
149
def __enter__(self):
150
return self
151
152
def __exit__(self, exc_type, exc_value, traceback):
153
self._cleanup()
154
return False
155
156
def __del__(self):
157
self._cleanup()
158
159
def _cleanup(self):
160
if self.tempdir is not None:
161
# Delete contents of tempdir
162
for root, dirs, files in os.walk(self.tempdir,
163
topdown = False):
164
for filename in files:
165
os.remove(os.path.join(root, filename))
166
for dirname in dirs:
167
os.rmdir(os.path.join(root, dirname))
168
# Remove tempdir
169
os.rmdir(self.tempdir)
170
self.tempdir = None
171
172
def password_encode(self, password):
173
# Passphrase can not be empty and can not contain newlines or
174
# NUL bytes. So we prefix it and hex encode it.
175
return b"mandos" + binascii.hexlify(password)
176
177
def encrypt(self, data, password):
178
passphrase = self.password_encode(password)
179
with tempfile.NamedTemporaryFile(dir=self.tempdir
180
) as passfile:
181
passfile.write(passphrase)
182
passfile.flush()
183
proc = subprocess.Popen(['gpg', '--symmetric',
184
'--passphrase-file',
185
passfile.name]
186
+ self.gnupgargs,
187
stdin = subprocess.PIPE,
188
stdout = subprocess.PIPE,
189
stderr = subprocess.PIPE)
190
ciphertext, err = proc.communicate(input = data)
191
if proc.returncode != 0:
192
raise PGPError(err)
193
return ciphertext
194
195
def decrypt(self, data, password):
196
passphrase = self.password_encode(password)
197
with tempfile.NamedTemporaryFile(dir = self.tempdir
198
) as passfile:
199
passfile.write(passphrase)
200
passfile.flush()
201
proc = subprocess.Popen(['gpg', '--decrypt',
202
'--passphrase-file',
203
passfile.name]
204
+ self.gnupgargs,
205
stdin = subprocess.PIPE,
206
stdout = subprocess.PIPE,
207
stderr = subprocess.PIPE)
208
decrypted_plaintext, err = proc.communicate(input
209
= data)
210
if proc.returncode != 0:
211
raise PGPError(err)
212
return decrypted_plaintext
213
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
214
102
215
103
class AvahiError(Exception):
216
104
def __init__(self, value, *args, **kwargs):
234
122
Used to optionally bind to the specified interface.
235
123
name: string; Example: 'Mandos'
236
124
type: string; Example: '_mandos._tcp'.
237
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
238
126
port: integer; what port to announce
239
127
TXT: list of strings; TXT record for the service
240
128
domain: string; Domain to publish on, default to .local if empty.
246
134
server: D-Bus Server
247
135
bus: dbus.SystemBus()
248
136
"""
249
250
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
251
138
servicetype = None, port = None, TXT = None,
252
139
domain = "", host = "", max_renames = 32768,
264
151
self.group = None # our entry group
265
152
self.server = None
266
153
self.bus = bus
267
self.entry_group_state_changed_match = None
268
269
154
def rename(self):
270
155
"""Derived from the Avahi example code"""
271
156
if self.rename_count >= self.max_renames:
273
158
" after %i retries, exiting.",
274
159
self.rename_count)
275
160
raise AvahiServiceError("Too many renames")
276
self.name = unicode(self.server
277
.GetAlternativeServiceName(self.name))
161
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
278
162
logger.info("Changing Zeroconf service name to %r ...",
279
163
self.name)
164
syslogger.setFormatter(logging.Formatter
165
('Mandos (%s) [%%(process)d]:'
166
' %%(levelname)s: %%(message)s'
167
% self.name))
280
168
self.remove()
281
169
try:
282
170
self.add()
283
except dbus.exceptions.DBusException as error:
284
logger.critical("D-Bus Exception", exc_info=error)
171
except dbus.exceptions.DBusException, error:
172
logger.critical("DBusException: %s", error)
285
173
self.cleanup()
286
174
os._exit(1)
287
175
self.rename_count += 1
288
289
176
def remove(self):
290
177
"""Derived from the Avahi example code"""
291
if self.entry_group_state_changed_match is not None:
292
self.entry_group_state_changed_match.remove()
293
self.entry_group_state_changed_match = None
294
178
if self.group is not None:
295
179
self.group.Reset()
296
297
180
def add(self):
298
181
"""Derived from the Avahi example code"""
299
self.remove()
300
182
if self.group is None:
301
183
self.group = dbus.Interface(
302
184
self.bus.get_object(avahi.DBUS_NAME,
303
185
self.server.EntryGroupNew()),
304
186
avahi.DBUS_INTERFACE_ENTRY_GROUP)
305
self.entry_group_state_changed_match = (
306
self.group.connect_to_signal(
307
'StateChanged', self.entry_group_state_changed))
187
self.group.connect_to_signal('StateChanged',
188
self
189
.entry_group_state_changed)
308
190
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
309
191
self.name, self.type)
310
192
self.group.AddService(
316
198
dbus.UInt16(self.port),
317
199
avahi.string_array_to_txt_array(self.TXT))
318
200
self.group.Commit()
319
320
201
def entry_group_state_changed(self, state, error):
321
202
"""Derived from the Avahi example code"""
322
203
logger.debug("Avahi entry group state change: %i", state)
329
210
elif state == avahi.ENTRY_GROUP_FAILURE:
330
211
logger.critical("Avahi: Error in group state changed %s",
331
212
unicode(error))
332
raise AvahiGroupError("State changed: {0!s}"
333
.format(error))
334
213
raise AvahiGroupError("State changed: %s"
214
% unicode(error))
335
215
def cleanup(self):
336
216
"""Derived from the Avahi example code"""
337
217
if self.group is not None:
338
try:
339
self.group.Free()
340
except (dbus.exceptions.UnknownMethodException,
341
dbus.exceptions.DBusException):
342
pass
218
self.group.Free()
343
219
self.group = None
344
self.remove()
345
346
def server_state_changed(self, state, error=None):
220
def server_state_changed(self, state):
347
221
"""Derived from the Avahi example code"""
348
222
logger.debug("Avahi server state change: %i", state)
349
bad_states = { avahi.SERVER_INVALID:
350
"Zeroconf server invalid",
351
avahi.SERVER_REGISTERING: None,
352
avahi.SERVER_COLLISION:
353
"Zeroconf server name collision",
354
avahi.SERVER_FAILURE:
355
"Zeroconf server failure" }
356
if state in bad_states:
357
if bad_states[state] is not None:
358
if error is None:
359
logger.error(bad_states[state])
360
else:
361
logger.error(bad_states[state] + ": %r", error)
362
self.cleanup()
223
if state == avahi.SERVER_COLLISION:
224
logger.error("Zeroconf server name collision")
225
self.remove()
363
226
elif state == avahi.SERVER_RUNNING:
364
227
self.add()
365
else:
366
if error is None:
367
logger.debug("Unknown state: %r", state)
368
else:
369
logger.debug("Unknown state: %r: %r", state, error)
370
371
228
def activate(self):
372
229
"""Derived from the Avahi example code"""
373
230
if self.server is None:
374
231
self.server = dbus.Interface(
375
232
self.bus.get_object(avahi.DBUS_NAME,
376
avahi.DBUS_PATH_SERVER,
377
follow_name_owner_changes=True),
233
avahi.DBUS_PATH_SERVER),
378
234
avahi.DBUS_INTERFACE_SERVER)
379
235
self.server.connect_to_signal("StateChanged",
380
236
self.server_state_changed)
381
237
self.server_state_changed(self.server.GetState())
382
238
383
239
384
class AvahiServiceToSyslog(AvahiService):
385
def rename(self):
386
"""Add the new name to the syslog messages"""
387
ret = AvahiService.rename(self)
388
syslogger.setFormatter(logging.Formatter
389
('Mandos ({0}) [%(process)d]:'
390
' %(levelname)s: %(message)s'
391
.format(self.name)))
392
return ret
393
394
395
def timedelta_to_milliseconds(td):
396
"Convert a datetime.timedelta() to milliseconds"
397
return ((td.days * 24 * 60 * 60 * 1000)
398
+ (td.seconds * 1000)
399
+ (td.microseconds // 1000))
400
401
402
240
class Client(object):
403
241
"""A representation of a client host served by this server.
404
242
405
243
Attributes:
406
approved: bool(); 'None' if not yet approved/disapproved
244
_approved: bool(); 'None' if not yet approved/disapproved
407
245
approval_delay: datetime.timedelta(); Time to wait for approval
408
246
approval_duration: datetime.timedelta(); Duration of one approval
409
247
checker: subprocess.Popen(); a running checker process used
416
254
instance %(name)s can be used in the command.
417
255
checker_initiator_tag: a gobject event source tag, or None
418
256
created: datetime.datetime(); (UTC) object creation
419
client_structure: Object describing what attributes a client has
420
and is used for storing the client at exit
421
257
current_checker_command: string; current running checker_command
258
disable_hook: If set, called by disable() as disable_hook(self)
422
259
disable_initiator_tag: a gobject event source tag, or None
423
260
enabled: bool()
424
261
fingerprint: string (40 or 32 hexadecimal digits); used to
427
264
interval: datetime.timedelta(); How often to start a new checker
428
265
last_approval_request: datetime.datetime(); (UTC) or None
429
266
last_checked_ok: datetime.datetime(); (UTC) or None
430
last_checker_status: integer between 0 and 255 reflecting exit
431
status of last checker. -1 reflects crashed
432
checker, -2 means no checker completed yet.
433
last_enabled: datetime.datetime(); (UTC) or None
267
last_enabled: datetime.datetime(); (UTC)
434
268
name: string; from the config file, used in log messages and
435
269
D-Bus identifiers
436
270
secret: bytestring; sent verbatim (over TLS) to client
437
271
timeout: datetime.timedelta(); How long from last_checked_ok
438
272
until this client is disabled
439
extended_timeout: extra long timeout when secret has been sent
440
273
runtime_expansions: Allowed attributes for runtime expansion.
441
expires: datetime.datetime(); time (UTC) when a client will be
442
disabled, or None
443
server_settings: The server_settings dict from main()
444
274
"""
445
275
446
276
runtime_expansions = ("approval_delay", "approval_duration",
447
"created", "enabled", "expires",
448
"fingerprint", "host", "interval",
449
"last_approval_request", "last_checked_ok",
277
"created", "enabled", "fingerprint",
278
"host", "interval", "last_checked_ok",
450
279
"last_enabled", "name", "timeout")
451
client_defaults = { "timeout": "PT5M",
452
"extended_timeout": "PT15M",
453
"interval": "PT2M",
454
"checker": "fping -q -- %%(host)s",
455
"host": "",
456
"approval_delay": "PT0S",
457
"approval_duration": "PT1S",
458
"approved_by_default": "True",
459
"enabled": "True",
460
}
280
281
@staticmethod
282
def _timedelta_to_milliseconds(td):
283
"Convert a datetime.timedelta() to milliseconds"
284
return ((td.days * 24 * 60 * 60 * 1000)
285
+ (td.seconds * 1000)
286
+ (td.microseconds // 1000))
461
287
462
288
def timeout_milliseconds(self):
463
289
"Return the 'timeout' attribute in milliseconds"
464
return timedelta_to_milliseconds(self.timeout)
465
466
def extended_timeout_milliseconds(self):
467
"Return the 'extended_timeout' attribute in milliseconds"
468
return timedelta_to_milliseconds(self.extended_timeout)
290
return self._timedelta_to_milliseconds(self.timeout)
469
291
470
292
def interval_milliseconds(self):
471
293
"Return the 'interval' attribute in milliseconds"
472
return timedelta_to_milliseconds(self.interval)
473
294
return self._timedelta_to_milliseconds(self.interval)
295
474
296
def approval_delay_milliseconds(self):
475
return timedelta_to_milliseconds(self.approval_delay)
476
477
@staticmethod
478
def config_parser(config):
479
"""Construct a new dict of client settings of this form:
480
{ client_name: {setting_name: value, ...}, ...}
481
with exceptions for any special settings as defined above.
482
NOTE: Must be a pure function. Must return the same result
483
value given the same arguments.
484
"""
485
settings = {}
486
for client_name in config.sections():
487
section = dict(config.items(client_name))
488
client = settings[client_name] = {}
489
490
client["host"] = section["host"]
491
# Reformat values from string types to Python types
492
client["approved_by_default"] = config.getboolean(
493
client_name, "approved_by_default")
494
client["enabled"] = config.getboolean(client_name,
495
"enabled")
496
497
client["fingerprint"] = (section["fingerprint"].upper()
498
.replace(" ", ""))
499
if "secret" in section:
500
client["secret"] = section["secret"].decode("base64")
501
elif "secfile" in section:
502
with open(os.path.expanduser(os.path.expandvars
503
(section["secfile"])),
504
"rb") as secfile:
505
client["secret"] = secfile.read()
506
else:
507
raise TypeError("No secret or secfile for section {0}"
508
.format(section))
509
client["timeout"] = string_to_delta(section["timeout"])
510
client["extended_timeout"] = string_to_delta(
511
section["extended_timeout"])
512
client["interval"] = string_to_delta(section["interval"])
513
client["approval_delay"] = string_to_delta(
514
section["approval_delay"])
515
client["approval_duration"] = string_to_delta(
516
section["approval_duration"])
517
client["checker_command"] = section["checker"]
518
client["last_approval_request"] = None
519
client["last_checked_ok"] = None
520
client["last_checker_status"] = -2
521
522
return settings
523
524
def __init__(self, settings, name = None, server_settings=None):
297
return self._timedelta_to_milliseconds(self.approval_delay)
298
299
def __init__(self, name = None, disable_hook=None, config=None):
300
"""Note: the 'checker' key in 'config' sets the
301
'checker_command' attribute and *not* the 'checker'
302
attribute."""
525
303
self.name = name
526
if server_settings is None:
527
server_settings = {}
528
self.server_settings = server_settings
529
# adding all client settings
530
for setting, value in settings.iteritems():
531
setattr(self, setting, value)
532
533
if self.enabled:
534
if not hasattr(self, "last_enabled"):
535
self.last_enabled = datetime.datetime.utcnow()
536
if not hasattr(self, "expires"):
537
self.expires = (datetime.datetime.utcnow()
538
+ self.timeout)
539
else:
540
self.last_enabled = None
541
self.expires = None
542
304
if config is None:
305
config = {}
543
306
logger.debug("Creating client %r", self.name)
544
307
# Uppercase and remove spaces from fingerprint for later
545
308
# comparison purposes with return value from the fingerprint()
546
309
# function
310
self.fingerprint = (config["fingerprint"].upper()
311
.replace(" ", ""))
547
312
logger.debug(" Fingerprint: %s", self.fingerprint)
548
self.created = settings.get("created",
549
datetime.datetime.utcnow())
550
551
# attributes specific for this server instance
313
if "secret" in config:
314
self.secret = config["secret"].decode("base64")
315
elif "secfile" in config:
316
with open(os.path.expanduser(os.path.expandvars
317
(config["secfile"])),
318
"rb") as secfile:
319
self.secret = secfile.read()
320
else:
321
raise TypeError("No secret or secfile for client %s"
322
% self.name)
323
self.host = config.get("host", "")
324
self.created = datetime.datetime.utcnow()
325
self.enabled = False
326
self.last_approval_request = None
327
self.last_enabled = None
328
self.last_checked_ok = None
329
self.timeout = string_to_delta(config["timeout"])
330
self.interval = string_to_delta(config["interval"])
331
self.disable_hook = disable_hook
552
332
self.checker = None
553
333
self.checker_initiator_tag = None
554
334
self.disable_initiator_tag = None
555
335
self.checker_callback_tag = None
336
self.checker_command = config["checker"]
556
337
self.current_checker_command = None
557
self.approved = None
338
self.last_connect = None
339
self._approved = None
340
self.approved_by_default = config.get("approved_by_default",
341
True)
558
342
self.approvals_pending = 0
559
self.changedstate = (multiprocessing_manager
560
.Condition(multiprocessing_manager
561
.Lock()))
562
self.client_structure = [attr for attr in
563
self.__dict__.iterkeys()
564
if not attr.startswith("_")]
565
self.client_structure.append("client_structure")
566
567
for name, t in inspect.getmembers(type(self),
568
lambda obj:
569
isinstance(obj,
570
property)):
571
if not name.startswith("_"):
572
self.client_structure.append(name)
343
self.approval_delay = string_to_delta(
344
config["approval_delay"])
345
self.approval_duration = string_to_delta(
346
config["approval_duration"])
347
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
573
348
574
# Send notice to process children that client state has changed
575
349
def send_changedstate(self):
576
with self.changedstate:
577
self.changedstate.notify_all()
578
350
self.changedstate.acquire()
351
self.changedstate.notify_all()
352
self.changedstate.release()
353
579
354
def enable(self):
580
355
"""Start this client's checker and timeout hooks"""
581
356
if getattr(self, "enabled", False):
582
357
# Already enabled
583
358
return
584
self.expires = datetime.datetime.utcnow() + self.timeout
585
self.enabled = True
359
self.send_changedstate()
586
360
self.last_enabled = datetime.datetime.utcnow()
587
self.init_checker()
588
self.send_changedstate()
589
590
def disable(self, quiet=True):
591
"""Disable this client."""
592
if not getattr(self, "enabled", False):
593
return False
594
if not quiet:
595
logger.info("Disabling client %s", self.name)
596
if getattr(self, "disable_initiator_tag", None) is not None:
597
gobject.source_remove(self.disable_initiator_tag)
598
self.disable_initiator_tag = None
599
self.expires = None
600
if getattr(self, "checker_initiator_tag", None) is not None:
601
gobject.source_remove(self.checker_initiator_tag)
602
self.checker_initiator_tag = None
603
self.stop_checker()
604
self.enabled = False
605
if not quiet:
606
self.send_changedstate()
607
# Do not run this again if called by a gobject.timeout_add
608
return False
609
610
def __del__(self):
611
self.disable()
612
613
def init_checker(self):
614
361
# Schedule a new checker to be started an 'interval' from now,
615
362
# and every interval from then on.
616
if self.checker_initiator_tag is not None:
617
gobject.source_remove(self.checker_initiator_tag)
618
363
self.checker_initiator_tag = (gobject.timeout_add
619
364
(self.interval_milliseconds(),
620
365
self.start_checker))
621
366
# Schedule a disable() when 'timeout' has passed
622
if self.disable_initiator_tag is not None:
623
gobject.source_remove(self.disable_initiator_tag)
624
367
self.disable_initiator_tag = (gobject.timeout_add
625
368
(self.timeout_milliseconds(),
626
369
self.disable))
370
self.enabled = True
627
371
# Also start a new checker *right now*.
628
372
self.start_checker()
629
373
374
def disable(self, quiet=True):
375
"""Disable this client."""
376
if not getattr(self, "enabled", False):
377
return False
378
if not quiet:
379
self.send_changedstate()
380
if not quiet:
381
logger.info("Disabling client %s", self.name)
382
if getattr(self, "disable_initiator_tag", False):
383
gobject.source_remove(self.disable_initiator_tag)
384
self.disable_initiator_tag = None
385
if getattr(self, "checker_initiator_tag", False):
386
gobject.source_remove(self.checker_initiator_tag)
387
self.checker_initiator_tag = None
388
self.stop_checker()
389
if self.disable_hook:
390
self.disable_hook(self)
391
self.enabled = False
392
# Do not run this again if called by a gobject.timeout_add
393
return False
394
395
def __del__(self):
396
self.disable_hook = None
397
self.disable()
398
630
399
def checker_callback(self, pid, condition, command):
631
400
"""The checker has completed, so take appropriate actions."""
632
401
self.checker_callback_tag = None
633
402
self.checker = None
634
403
if os.WIFEXITED(condition):
635
self.last_checker_status = os.WEXITSTATUS(condition)
636
if self.last_checker_status == 0:
404
exitstatus = os.WEXITSTATUS(condition)
405
if exitstatus == 0:
637
406
logger.info("Checker for %(name)s succeeded",
638
407
vars(self))
639
408
self.checked_ok()
641
410
logger.info("Checker for %(name)s failed",
642
411
vars(self))
643
412
else:
644
self.last_checker_status = -1
645
413
logger.warning("Checker for %(name)s crashed?",
646
414
vars(self))
647
415
648
416
def checked_ok(self):
649
"""Assert that the client has been seen, alive and well."""
417
"""Bump up the timeout for this client.
418
419
This should only be called when the client has been seen,
420
alive and well.
421
"""
650
422
self.last_checked_ok = datetime.datetime.utcnow()
651
self.last_checker_status = 0
652
self.bump_timeout()
653
654
def bump_timeout(self, timeout=None):
655
"""Bump up the timeout for this client."""
656
if timeout is None:
657
timeout = self.timeout
658
if self.disable_initiator_tag is not None:
659
gobject.source_remove(self.disable_initiator_tag)
660
self.disable_initiator_tag = None
661
if getattr(self, "enabled", False):
662
self.disable_initiator_tag = (gobject.timeout_add
663
(timedelta_to_milliseconds
664
(timeout), self.disable))
665
self.expires = datetime.datetime.utcnow() + timeout
423
gobject.source_remove(self.disable_initiator_tag)
424
self.disable_initiator_tag = (gobject.timeout_add
425
(self.timeout_milliseconds(),
426
self.disable))
666
427
667
428
def need_approval(self):
668
429
self.last_approval_request = datetime.datetime.utcnow()
673
434
If a checker already exists, leave it running and do
674
435
nothing."""
675
436
# The reason for not killing a running checker is that if we
676
# did that, and if a checker (for some reason) started running
677
# slowly and taking more than 'interval' time, then the client
678
# would inevitably timeout, since no checker would get a
679
# chance to run to completion. If we instead leave running
437
# did that, then if a checker (for some reason) started
438
# running slowly and taking more than 'interval' time, the
439
# client would inevitably timeout, since no checker would get
440
# a chance to run to completion. If we instead leave running
680
441
# checkers alone, the checker would have to take more time
681
442
# than 'timeout' for the client to be disabled, which is as it
682
443
# should be.
684
445
# If a checker exists, make sure it is not a zombie
685
446
try:
686
447
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
687
except (AttributeError, OSError) as error:
448
except (AttributeError, OSError), error:
688
449
if (isinstance(error, OSError)
689
450
and error.errno != errno.ECHILD):
690
451
raise error
696
457
self.current_checker_command)
697
458
# Start a new checker if needed
698
459
if self.checker is None:
699
# Escape attributes for the shell
700
escaped_attrs = dict(
701
(attr, re.escape(unicode(getattr(self, attr))))
702
for attr in
703
self.runtime_expansions)
704
460
try:
705
command = self.checker_command % escaped_attrs
706
except TypeError as error:
707
logger.error('Could not format string "%s"',
708
self.checker_command, exc_info=error)
709
return True # Try again later
461
# In case checker_command has exactly one % operator
462
command = self.checker_command % self.host
463
except TypeError:
464
# Escape attributes for the shell
465
escaped_attrs = dict(
466
(attr,
467
re.escape(unicode(str(getattr(self, attr, "")),
468
errors=
469
'replace')))
470
for attr in
471
self.runtime_expansions)
472
473
try:
474
command = self.checker_command % escaped_attrs
475
except TypeError, error:
476
logger.error('Could not format string "%s":'
477
' %s', self.checker_command, error)
478
return True # Try again later
710
479
self.current_checker_command = command
711
480
try:
712
481
logger.info("Starting checker %r for %s",
715
484
# in normal mode, that is already done by daemon(),
716
485
# and in debug mode we don't want to. (Stdin is
717
486
# always replaced by /dev/null.)
718
# The exception is when not debugging but nevertheless
719
# running in the foreground; use the previously
720
# created wnull.
721
popen_args = {}
722
if (not self.server_settings["debug"]
723
and self.server_settings["foreground"]):
724
popen_args.update({"stdout": wnull,
725
"stderr": wnull })
726
487
self.checker = subprocess.Popen(command,
727
488
close_fds=True,
728
shell=True, cwd="/",
729
**popen_args)
730
except OSError as error:
731
logger.error("Failed to start subprocess",
732
exc_info=error)
733
return True
734
self.checker_callback_tag = (gobject.child_watch_add
735
(self.checker.pid,
736
self.checker_callback,
737
data=command))
738
# The checker may have completed before the gobject
739
# watch was added. Check for this.
740
try:
489
shell=True, cwd="/")
490
self.checker_callback_tag = (gobject.child_watch_add
491
(self.checker.pid,
492
self.checker_callback,
493
data=command))
494
# The checker may have completed before the gobject
495
# watch was added. Check for this.
741
496
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
742
except OSError as error:
743
if error.errno == errno.ECHILD:
744
# This should never happen
745
logger.error("Child process vanished",
746
exc_info=error)
747
return True
748
raise
749
if pid:
750
gobject.source_remove(self.checker_callback_tag)
751
self.checker_callback(pid, status, command)
497
if pid:
498
gobject.source_remove(self.checker_callback_tag)
499
self.checker_callback(pid, status, command)
500
except OSError, error:
501
logger.error("Failed to start subprocess: %s",
502
error)
752
503
# Re-run this periodically if run by gobject.timeout_add
753
504
return True
754
505
761
512
return
762
513
logger.debug("Stopping checker for %(name)s", vars(self))
763
514
try:
764
self.checker.terminate()
515
os.kill(self.checker.pid, signal.SIGTERM)
765
516
#time.sleep(0.5)
766
517
#if self.checker.poll() is None:
767
# self.checker.kill()
768
except OSError as error:
518
# os.kill(self.checker.pid, signal.SIGKILL)
519
except OSError, error:
769
520
if error.errno != errno.ESRCH: # No such process
770
521
raise
771
522
self.checker = None
772
523
773
774
524
def dbus_service_property(dbus_interface, signature="v",
775
525
access="readwrite", byte_arrays=False):
776
526
"""Decorators for marking methods of a DBusObjectWithProperties to
787
537
# "Set" method, so we fail early here:
788
538
if byte_arrays and signature != "ay":
789
539
raise ValueError("Byte arrays not supported for non-'ay'"
790
" signature {0!r}".format(signature))
540
" signature %r" % signature)
791
541
def decorator(func):
792
542
func._dbus_is_property = True
793
543
func._dbus_interface = dbus_interface
801
551
return decorator
802
552
803
553
804
def dbus_interface_annotations(dbus_interface):
805
"""Decorator for marking functions returning interface annotations
806
807
Usage:
808
809
@dbus_interface_annotations("org.example.Interface")
810
def _foo(self): # Function name does not matter
811
return {"org.freedesktop.DBus.Deprecated": "true",
812
"org.freedesktop.DBus.Property.EmitsChangedSignal":
813
"false"}
814
"""
815
def decorator(func):
816
func._dbus_is_interface = True
817
func._dbus_interface = dbus_interface
818
func._dbus_name = dbus_interface
819
return func
820
return decorator
821
822
823
def dbus_annotations(annotations):
824
"""Decorator to annotate D-Bus methods, signals or properties
825
Usage:
826
827
@dbus_service_property("org.example.Interface", signature="b",
828
access="r")
829
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
830
"org.freedesktop.DBus.Property."
831
"EmitsChangedSignal": "false"})
832
def Property_dbus_property(self):
833
return dbus.Boolean(False)
834
"""
835
def decorator(func):
836
func._dbus_annotations = annotations
837
return func
838
return decorator
839
840
841
554
class DBusPropertyException(dbus.exceptions.DBusException):
842
555
"""A base class for D-Bus property-related exceptions
843
556
"""
859
572
860
573
class DBusObjectWithProperties(dbus.service.Object):
861
574
"""A D-Bus object with properties.
862
575
863
576
Classes inheriting from this can use the dbus_service_property
864
577
decorator to expose methods as D-Bus properties. It exposes the
865
578
standard Get(), Set(), and GetAll() methods on the D-Bus.
866
579
"""
867
580
868
581
@staticmethod
869
def _is_dbus_thing(thing):
870
"""Returns a function testing if an attribute is a D-Bus thing
871
872
If called like _is_dbus_thing("method") it returns a function
873
suitable for use as predicate to inspect.getmembers().
874
"""
875
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
876
False)
582
def _is_dbus_property(obj):
583
return getattr(obj, "_dbus_is_property", False)
877
584
878
def _get_all_dbus_things(self, thing):
585
def _get_all_dbus_properties(self):
879
586
"""Returns a generator of (name, attribute) pairs
880
587
"""
881
return ((getattr(athing.__get__(self), "_dbus_name",
882
name),
883
athing.__get__(self))
884
for cls in self.__class__.__mro__
885
for name, athing in
886
inspect.getmembers(cls,
887
self._is_dbus_thing(thing)))
588
return ((prop._dbus_name, prop)
589
for name, prop in
590
inspect.getmembers(self, self._is_dbus_property))
888
591
889
592
def _get_dbus_property(self, interface_name, property_name):
890
593
"""Returns a bound method if one exists which is a D-Bus
891
594
property with the specified name and interface.
892
595
"""
893
for cls in self.__class__.__mro__:
894
for name, value in (inspect.getmembers
895
(cls,
896
self._is_dbus_thing("property"))):
897
if (value._dbus_name == property_name
898
and value._dbus_interface == interface_name):
899
return value.__get__(self)
900
596
for name in (property_name,
597
property_name + "_dbus_property"):
598
prop = getattr(self, name, None)
599
if (prop is None
600
or not self._is_dbus_property(prop)
601
or prop._dbus_name != property_name
602
or (interface_name and prop._dbus_interface
603
and interface_name != prop._dbus_interface)):
604
continue
605
return prop
901
606
# No such property
902
607
raise DBusPropertyNotFound(self.dbus_object_path + ":"
903
608
+ interface_name + "."
928
633
# signatures other than "ay".
929
634
if prop._dbus_signature != "ay":
930
635
raise ValueError
931
value = dbus.ByteArray(b''.join(chr(byte)
932
for byte in value))
636
value = dbus.ByteArray(''.join(unichr(byte)
637
for byte in value))
933
638
prop(value)
934
639
935
640
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
937
642
def GetAll(self, interface_name):
938
643
"""Standard D-Bus property GetAll() method, see D-Bus
939
644
standard.
940
645
941
646
Note: Will not include properties with access="write".
942
647
"""
943
properties = {}
944
for name, prop in self._get_all_dbus_things("property"):
648
all = {}
649
for name, prop in self._get_all_dbus_properties():
945
650
if (interface_name
946
651
and interface_name != prop._dbus_interface):
947
652
# Interface non-empty but did not match
951
656
continue
952
657
value = prop()
953
658
if not hasattr(value, "variant_level"):
954
properties[name] = value
659
all[name] = value
955
660
continue
956
properties[name] = type(value)(value, variant_level=
957
value.variant_level+1)
958
return dbus.Dictionary(properties, signature="sv")
661
all[name] = type(value)(value, variant_level=
662
value.variant_level+1)
663
return dbus.Dictionary(all, signature="sv")
959
664
960
665
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
961
666
out_signature="s",
962
667
path_keyword='object_path',
963
668
connection_keyword='connection')
964
669
def Introspect(self, object_path, connection):
965
"""Overloading of standard D-Bus method.
966
967
Inserts property tags and interface annotation tags.
670
"""Standard D-Bus method, overloaded to insert property tags.
968
671
"""
969
672
xmlstring = dbus.service.Object.Introspect(self, object_path,
970
673
connection)
977
680
e.setAttribute("access", prop._dbus_access)
978
681
return e
979
682
for if_tag in document.getElementsByTagName("interface"):
980
# Add property tags
981
683
for tag in (make_tag(document, name, prop)
982
684
for name, prop
983
in self._get_all_dbus_things("property")
685
in self._get_all_dbus_properties()
984
686
if prop._dbus_interface
985
687
== if_tag.getAttribute("name")):
986
688
if_tag.appendChild(tag)
987
# Add annotation tags
988
for typ in ("method", "signal", "property"):
989
for tag in if_tag.getElementsByTagName(typ):
990
annots = dict()
991
for name, prop in (self.
992
_get_all_dbus_things(typ)):
993
if (name == tag.getAttribute("name")
994
and prop._dbus_interface
995
== if_tag.getAttribute("name")):
996
annots.update(getattr
997
(prop,
998
"_dbus_annotations",
999
{}))
1000
for name, value in annots.iteritems():
1001
ann_tag = document.createElement(
1002
"annotation")
1003
ann_tag.setAttribute("name", name)
1004
ann_tag.setAttribute("value", value)
1005
tag.appendChild(ann_tag)
1006
# Add interface annotation tags
1007
for annotation, value in dict(
1008
itertools.chain.from_iterable(
1009
annotations().iteritems()
1010
for name, annotations in
1011
self._get_all_dbus_things("interface")
1012
if name == if_tag.getAttribute("name")
1013
)).iteritems():
1014
ann_tag = document.createElement("annotation")
1015
ann_tag.setAttribute("name", annotation)
1016
ann_tag.setAttribute("value", value)
1017
if_tag.appendChild(ann_tag)
1018
689
# Add the names to the return values for the
1019
690
# "org.freedesktop.DBus.Properties" methods
1020
691
if (if_tag.getAttribute("name")
1033
704
xmlstring = document.toxml("utf-8")
1034
705
document.unlink()
1035
706
except (AttributeError, xml.dom.DOMException,
1036
xml.parsers.expat.ExpatError) as error:
707
xml.parsers.expat.ExpatError), error:
1037
708
logger.error("Failed to override Introspection method",
1038
exc_info=error)
709
error)
1039
710
return xmlstring
1040
711
1041
712
1042
def datetime_to_dbus(dt, variant_level=0):
1043
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1044
if dt is None:
1045
return dbus.String("", variant_level = variant_level)
1046
return dbus.String(dt.isoformat(),
1047
variant_level=variant_level)
1048
1049
1050
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1051
"""A class decorator; applied to a subclass of
1052
dbus.service.Object, it will add alternate D-Bus attributes with
1053
interface names according to the "alt_interface_names" mapping.
1054
Usage:
1055
1056
@alternate_dbus_interfaces({"org.example.Interface":
1057
"net.example.AlternateInterface"})
1058
class SampleDBusObject(dbus.service.Object):
1059
@dbus.service.method("org.example.Interface")
1060
def SampleDBusMethod():
1061
pass
1062
1063
The above "SampleDBusMethod" on "SampleDBusObject" will be
1064
reachable via two interfaces: "org.example.Interface" and
1065
"net.example.AlternateInterface", the latter of which will have
1066
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1067
"true", unless "deprecate" is passed with a False value.
1068
1069
This works for methods and signals, and also for D-Bus properties
1070
(from DBusObjectWithProperties) and interfaces (from the
1071
dbus_interface_annotations decorator).
1072
"""
1073
def wrapper(cls):
1074
for orig_interface_name, alt_interface_name in (
1075
alt_interface_names.iteritems()):
1076
attr = {}
1077
interface_names = set()
1078
# Go though all attributes of the class
1079
for attrname, attribute in inspect.getmembers(cls):
1080
# Ignore non-D-Bus attributes, and D-Bus attributes
1081
# with the wrong interface name
1082
if (not hasattr(attribute, "_dbus_interface")
1083
or not attribute._dbus_interface
1084
.startswith(orig_interface_name)):
1085
continue
1086
# Create an alternate D-Bus interface name based on
1087
# the current name
1088
alt_interface = (attribute._dbus_interface
1089
.replace(orig_interface_name,
1090
alt_interface_name))
1091
interface_names.add(alt_interface)
1092
# Is this a D-Bus signal?
1093
if getattr(attribute, "_dbus_is_signal", False):
1094
# Extract the original non-method undecorated
1095
# function by black magic
1096
nonmethod_func = (dict(
1097
zip(attribute.func_code.co_freevars,
1098
attribute.__closure__))["func"]
1099
.cell_contents)
1100
# Create a new, but exactly alike, function
1101
# object, and decorate it to be a new D-Bus signal
1102
# with the alternate D-Bus interface name
1103
new_function = (dbus.service.signal
1104
(alt_interface,
1105
attribute._dbus_signature)
1106
(types.FunctionType(
1107
nonmethod_func.func_code,
1108
nonmethod_func.func_globals,
1109
nonmethod_func.func_name,
1110
nonmethod_func.func_defaults,
1111
nonmethod_func.func_closure)))
1112
# Copy annotations, if any
1113
try:
1114
new_function._dbus_annotations = (
1115
dict(attribute._dbus_annotations))
1116
except AttributeError:
1117
pass
1118
# Define a creator of a function to call both the
1119
# original and alternate functions, so both the
1120
# original and alternate signals gets sent when
1121
# the function is called
1122
def fixscope(func1, func2):
1123
"""This function is a scope container to pass
1124
func1 and func2 to the "call_both" function
1125
outside of its arguments"""
1126
def call_both(*args, **kwargs):
1127
"""This function will emit two D-Bus
1128
signals by calling func1 and func2"""
1129
func1(*args, **kwargs)
1130
func2(*args, **kwargs)
1131
return call_both
1132
# Create the "call_both" function and add it to
1133
# the class
1134
attr[attrname] = fixscope(attribute, new_function)
1135
# Is this a D-Bus method?
1136
elif getattr(attribute, "_dbus_is_method", False):
1137
# Create a new, but exactly alike, function
1138
# object. Decorate it to be a new D-Bus method
1139
# with the alternate D-Bus interface name. Add it
1140
# to the class.
1141
attr[attrname] = (dbus.service.method
1142
(alt_interface,
1143
attribute._dbus_in_signature,
1144
attribute._dbus_out_signature)
1145
(types.FunctionType
1146
(attribute.func_code,
1147
attribute.func_globals,
1148
attribute.func_name,
1149
attribute.func_defaults,
1150
attribute.func_closure)))
1151
# Copy annotations, if any
1152
try:
1153
attr[attrname]._dbus_annotations = (
1154
dict(attribute._dbus_annotations))
1155
except AttributeError:
1156
pass
1157
# Is this a D-Bus property?
1158
elif getattr(attribute, "_dbus_is_property", False):
1159
# Create a new, but exactly alike, function
1160
# object, and decorate it to be a new D-Bus
1161
# property with the alternate D-Bus interface
1162
# name. Add it to the class.
1163
attr[attrname] = (dbus_service_property
1164
(alt_interface,
1165
attribute._dbus_signature,
1166
attribute._dbus_access,
1167
attribute
1168
._dbus_get_args_options
1169
["byte_arrays"])
1170
(types.FunctionType
1171
(attribute.func_code,
1172
attribute.func_globals,
1173
attribute.func_name,
1174
attribute.func_defaults,
1175
attribute.func_closure)))
1176
# Copy annotations, if any
1177
try:
1178
attr[attrname]._dbus_annotations = (
1179
dict(attribute._dbus_annotations))
1180
except AttributeError:
1181
pass
1182
# Is this a D-Bus interface?
1183
elif getattr(attribute, "_dbus_is_interface", False):
1184
# Create a new, but exactly alike, function
1185
# object. Decorate it to be a new D-Bus interface
1186
# with the alternate D-Bus interface name. Add it
1187
# to the class.
1188
attr[attrname] = (dbus_interface_annotations
1189
(alt_interface)
1190
(types.FunctionType
1191
(attribute.func_code,
1192
attribute.func_globals,
1193
attribute.func_name,
1194
attribute.func_defaults,
1195
attribute.func_closure)))
1196
if deprecate:
1197
# Deprecate all alternate interfaces
1198
iname="_AlternateDBusNames_interface_annotation{0}"
1199
for interface_name in interface_names:
1200
@dbus_interface_annotations(interface_name)
1201
def func(self):
1202
return { "org.freedesktop.DBus.Deprecated":
1203
"true" }
1204
# Find an unused name
1205
for aname in (iname.format(i)
1206
for i in itertools.count()):
1207
if aname not in attr:
1208
attr[aname] = func
1209
break
1210
if interface_names:
1211
# Replace the class with a new subclass of it with
1212
# methods, signals, etc. as created above.
1213
cls = type(b"{0}Alternate".format(cls.__name__),
1214
(cls,), attr)
1215
return cls
1216
return wrapper
1217
1218
1219
@alternate_dbus_interfaces({"se.recompile.Mandos":
1220
"se.bsnet.fukt.Mandos"})
1221
713
class ClientDBus(Client, DBusObjectWithProperties):
1222
714
"""A Client class using D-Bus
1223
715
1232
724
# dbus.service.Object doesn't use super(), so we can't either.
1233
725
1234
726
def __init__(self, bus = None, *args, **kwargs):
727
self._approvals_pending = 0
1235
728
self.bus = bus
1236
729
Client.__init__(self, *args, **kwargs)
1237
730
# Only now, when this client is initialized, can it show up on
1243
736
("/clients/" + client_object_name))
1244
737
DBusObjectWithProperties.__init__(self, self.bus,
1245
738
self.dbus_object_path)
1246
1247
def notifychangeproperty(transform_func,
1248
dbus_name, type_func=lambda x: x,
1249
variant_level=1):
1250
""" Modify a variable so that it's a property which announces
1251
its changes to DBus.
1252
1253
transform_fun: Function that takes a value and a variant_level
1254
and transforms it to a D-Bus type.
1255
dbus_name: D-Bus name of the variable
1256
type_func: Function that transform the value before sending it
1257
to the D-Bus. Default: no transform
1258
variant_level: D-Bus variant level. Default: 1
1259
"""
1260
attrname = "_{0}".format(dbus_name)
1261
def setter(self, value):
1262
if hasattr(self, "dbus_object_path"):
1263
if (not hasattr(self, attrname) or
1264
type_func(getattr(self, attrname, None))
1265
!= type_func(value)):
1266
dbus_value = transform_func(type_func(value),
1267
variant_level
1268
=variant_level)
1269
self.PropertyChanged(dbus.String(dbus_name),
1270
dbus_value)
1271
setattr(self, attrname, value)
1272
1273
return property(lambda self: getattr(self, attrname), setter)
1274
1275
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1276
approvals_pending = notifychangeproperty(dbus.Boolean,
1277
"ApprovalPending",
1278
type_func = bool)
1279
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1280
last_enabled = notifychangeproperty(datetime_to_dbus,
1281
"LastEnabled")
1282
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1283
type_func = lambda checker:
1284
checker is not None)
1285
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1286
"LastCheckedOK")
1287
last_checker_status = notifychangeproperty(dbus.Int16,
1288
"LastCheckerStatus")
1289
last_approval_request = notifychangeproperty(
1290
datetime_to_dbus, "LastApprovalRequest")
1291
approved_by_default = notifychangeproperty(dbus.Boolean,
1292
"ApprovedByDefault")
1293
approval_delay = notifychangeproperty(dbus.UInt64,
1294
"ApprovalDelay",
1295
type_func =
1296
timedelta_to_milliseconds)
1297
approval_duration = notifychangeproperty(
1298
dbus.UInt64, "ApprovalDuration",
1299
type_func = timedelta_to_milliseconds)
1300
host = notifychangeproperty(dbus.String, "Host")
1301
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1302
type_func =
1303
timedelta_to_milliseconds)
1304
extended_timeout = notifychangeproperty(
1305
dbus.UInt64, "ExtendedTimeout",
1306
type_func = timedelta_to_milliseconds)
1307
interval = notifychangeproperty(dbus.UInt64,
1308
"Interval",
1309
type_func =
1310
timedelta_to_milliseconds)
1311
checker_command = notifychangeproperty(dbus.String, "Checker")
1312
1313
del notifychangeproperty
739
740
def _get_approvals_pending(self):
741
return self._approvals_pending
742
def _set_approvals_pending(self, value):
743
old_value = self._approvals_pending
744
self._approvals_pending = value
745
bval = bool(value)
746
if (hasattr(self, "dbus_object_path")
747
and bval is not bool(old_value)):
748
dbus_bool = dbus.Boolean(bval, variant_level=1)
749
self.PropertyChanged(dbus.String("ApprovalPending"),
750
dbus_bool)
751
752
approvals_pending = property(_get_approvals_pending,
753
_set_approvals_pending)
754
del _get_approvals_pending, _set_approvals_pending
755
756
@staticmethod
757
def _datetime_to_dbus(dt, variant_level=0):
758
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
return dbus.String(dt.isoformat(),
760
variant_level=variant_level)
761
762
def enable(self):
763
oldstate = getattr(self, "enabled", False)
764
r = Client.enable(self)
765
if oldstate != self.enabled:
766
# Emit D-Bus signals
767
self.PropertyChanged(dbus.String("Enabled"),
768
dbus.Boolean(True, variant_level=1))
769
self.PropertyChanged(
770
dbus.String("LastEnabled"),
771
self._datetime_to_dbus(self.last_enabled,
772
variant_level=1))
773
return r
774
775
def disable(self, quiet = False):
776
oldstate = getattr(self, "enabled", False)
777
r = Client.disable(self, quiet=quiet)
778
if not quiet and oldstate != self.enabled:
779
# Emit D-Bus signal
780
self.PropertyChanged(dbus.String("Enabled"),
781
dbus.Boolean(False, variant_level=1))
782
return r
1314
783
1315
784
def __del__(self, *args, **kwargs):
1316
785
try:
1325
794
*args, **kwargs):
1326
795
self.checker_callback_tag = None
1327
796
self.checker = None
797
# Emit D-Bus signal
798
self.PropertyChanged(dbus.String("CheckerRunning"),
799
dbus.Boolean(False, variant_level=1))
1328
800
if os.WIFEXITED(condition):
1329
801
exitstatus = os.WEXITSTATUS(condition)
1330
802
# Emit D-Bus signal
1340
812
return Client.checker_callback(self, pid, condition, command,
1341
813
*args, **kwargs)
1342
814
815
def checked_ok(self, *args, **kwargs):
816
r = Client.checked_ok(self, *args, **kwargs)
817
# Emit D-Bus signal
818
self.PropertyChanged(
819
dbus.String("LastCheckedOK"),
820
(self._datetime_to_dbus(self.last_checked_ok,
821
variant_level=1)))
822
return r
823
824
def need_approval(self, *args, **kwargs):
825
r = Client.need_approval(self, *args, **kwargs)
826
# Emit D-Bus signal
827
self.PropertyChanged(
828
dbus.String("LastApprovalRequest"),
829
(self._datetime_to_dbus(self.last_approval_request,
830
variant_level=1)))
831
return r
832
1343
833
def start_checker(self, *args, **kwargs):
1344
834
old_checker = self.checker
1345
835
if self.checker is not None:
1352
842
and old_checker_pid != self.checker.pid):
1353
843
# Emit D-Bus signal
1354
844
self.CheckerStarted(self.current_checker_command)
845
self.PropertyChanged(
846
dbus.String("CheckerRunning"),
847
dbus.Boolean(True, variant_level=1))
1355
848
return r
1356
849
850
def stop_checker(self, *args, **kwargs):
851
old_checker = getattr(self, "checker", None)
852
r = Client.stop_checker(self, *args, **kwargs)
853
if (old_checker is not None
854
and getattr(self, "checker", None) is None):
855
self.PropertyChanged(dbus.String("CheckerRunning"),
856
dbus.Boolean(False, variant_level=1))
857
return r
858
1357
859
def _reset_approved(self):
1358
self.approved = None
860
self._approved = None
1359
861
return False
1360
862
1361
863
def approve(self, value=True):
1362
self.approved = value
1363
gobject.timeout_add(timedelta_to_milliseconds
864
self.send_changedstate()
865
self._approved = value
866
gobject.timeout_add(self._timedelta_to_milliseconds
1364
867
(self.approval_duration),
1365
868
self._reset_approved)
1366
self.send_changedstate()
869
1367
870
1368
871
## D-Bus methods, signals & properties
1369
_interface = "se.recompile.Mandos.Client"
1370
1371
## Interfaces
1372
1373
@dbus_interface_annotations(_interface)
1374
def _foo(self):
1375
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1376
"false"}
872
_interface = "se.bsnet.fukt.Mandos.Client"
1377
873
1378
874
## Signals
1379
875
1426
922
# CheckedOK - method
1427
923
@dbus.service.method(_interface)
1428
924
def CheckedOK(self):
1429
self.checked_ok()
925
return self.checked_ok()
1430
926
1431
927
# Enable - method
1432
928
@dbus.service.method(_interface)
1465
961
if value is None: # get
1466
962
return dbus.Boolean(self.approved_by_default)
1467
963
self.approved_by_default = bool(value)
964
# Emit D-Bus signal
965
self.PropertyChanged(dbus.String("ApprovedByDefault"),
966
dbus.Boolean(value, variant_level=1))
1468
967
1469
968
# ApprovalDelay - property
1470
969
@dbus_service_property(_interface, signature="t",
1473
972
if value is None: # get
1474
973
return dbus.UInt64(self.approval_delay_milliseconds())
1475
974
self.approval_delay = datetime.timedelta(0, 0, 0, value)
975
# Emit D-Bus signal
976
self.PropertyChanged(dbus.String("ApprovalDelay"),
977
dbus.UInt64(value, variant_level=1))
1476
978
1477
979
# ApprovalDuration - property
1478
980
@dbus_service_property(_interface, signature="t",
1479
981
access="readwrite")
1480
982
def ApprovalDuration_dbus_property(self, value=None):
1481
983
if value is None: # get
1482
return dbus.UInt64(timedelta_to_milliseconds(
984
return dbus.UInt64(self._timedelta_to_milliseconds(
1483
985
self.approval_duration))
1484
986
self.approval_duration = datetime.timedelta(0, 0, 0, value)
987
# Emit D-Bus signal
988
self.PropertyChanged(dbus.String("ApprovalDuration"),
989
dbus.UInt64(value, variant_level=1))
1485
990
1486
991
# Name - property
1487
992
@dbus_service_property(_interface, signature="s", access="read")
1499
1004
def Host_dbus_property(self, value=None):
1500
1005
if value is None: # get
1501
1006
return dbus.String(self.host)
1502
self.host = unicode(value)
1007
self.host = value
1008
# Emit D-Bus signal
1009
self.PropertyChanged(dbus.String("Host"),
1010
dbus.String(value, variant_level=1))
1503
1011
1504
1012
# Created - property
1505
1013
@dbus_service_property(_interface, signature="s", access="read")
1506
1014
def Created_dbus_property(self):
1507
return datetime_to_dbus(self.created)
1015
return dbus.String(self._datetime_to_dbus(self.created))
1508
1016
1509
1017
# LastEnabled - property
1510
1018
@dbus_service_property(_interface, signature="s", access="read")
1511
1019
def LastEnabled_dbus_property(self):
1512
return datetime_to_dbus(self.last_enabled)
1020
if self.last_enabled is None:
1021
return dbus.String("")
1022
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1513
1023
1514
1024
# Enabled - property
1515
1025
@dbus_service_property(_interface, signature="b",
1529
1039
if value is not None:
1530
1040
self.checked_ok()
1531
1041
return
1532
return datetime_to_dbus(self.last_checked_ok)
1533
1534
# LastCheckerStatus - property
1535
@dbus_service_property(_interface, signature="n",
1536
access="read")
1537
def LastCheckerStatus_dbus_property(self):
1538
return dbus.Int16(self.last_checker_status)
1539
1540
# Expires - property
1541
@dbus_service_property(_interface, signature="s", access="read")
1542
def Expires_dbus_property(self):
1543
return datetime_to_dbus(self.expires)
1042
if self.last_checked_ok is None:
1043
return dbus.String("")
1044
return dbus.String(self._datetime_to_dbus(self
1045
.last_checked_ok))
1544
1046
1545
1047
# LastApprovalRequest - property
1546
1048
@dbus_service_property(_interface, signature="s", access="read")
1547
1049
def LastApprovalRequest_dbus_property(self):
1548
return datetime_to_dbus(self.last_approval_request)
1050
if self.last_approval_request is None:
1051
return dbus.String("")
1052
return dbus.String(self.
1053
_datetime_to_dbus(self
1054
.last_approval_request))
1549
1055
1550
1056
# Timeout - property
1551
1057
@dbus_service_property(_interface, signature="t",
1553
1059
def Timeout_dbus_property(self, value=None):
1554
1060
if value is None: # get
1555
1061
return dbus.UInt64(self.timeout_milliseconds())
1556
old_timeout = self.timeout
1557
1062
self.timeout = datetime.timedelta(0, 0, 0, value)
1558
# Reschedule disabling
1559
if self.enabled:
1560
now = datetime.datetime.utcnow()
1561
self.expires += self.timeout - old_timeout
1562
if self.expires <= now:
1563
# The timeout has passed
1564
self.disable()
1565
else:
1566
if (getattr(self, "disable_initiator_tag", None)
1567
is None):
1568
return
1569
gobject.source_remove(self.disable_initiator_tag)
1570
self.disable_initiator_tag = (
1571
gobject.timeout_add(
1572
timedelta_to_milliseconds(self.expires - now),
1573
self.disable))
1574
1575
# ExtendedTimeout - property
1576
@dbus_service_property(_interface, signature="t",
1577
access="readwrite")
1578
def ExtendedTimeout_dbus_property(self, value=None):
1579
if value is None: # get
1580
return dbus.UInt64(self.extended_timeout_milliseconds())
1581
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1063
# Emit D-Bus signal
1064
self.PropertyChanged(dbus.String("Timeout"),
1065
dbus.UInt64(value, variant_level=1))
1066
if getattr(self, "disable_initiator_tag", None) is None:
1067
return
1068
# Reschedule timeout
1069
gobject.source_remove(self.disable_initiator_tag)
1070
self.disable_initiator_tag = None
1071
time_to_die = (self.
1072
_timedelta_to_milliseconds((self
1073
.last_checked_ok
1074
+ self.timeout)
1075
- datetime.datetime
1076
.utcnow()))
1077
if time_to_die <= 0:
1078
# The timeout has passed
1079
self.disable()
1080
else:
1081
self.disable_initiator_tag = (gobject.timeout_add
1082
(time_to_die, self.disable))
1582
1083
1583
1084
# Interval - property
1584
1085
@dbus_service_property(_interface, signature="t",
1587
1088
if value is None: # get
1588
1089
return dbus.UInt64(self.interval_milliseconds())
1589
1090
self.interval = datetime.timedelta(0, 0, 0, value)
1091
# Emit D-Bus signal
1092
self.PropertyChanged(dbus.String("Interval"),
1093
dbus.UInt64(value, variant_level=1))
1590
1094
if getattr(self, "checker_initiator_tag", None) is None:
1591
1095
return
1592
if self.enabled:
1593
# Reschedule checker run
1594
gobject.source_remove(self.checker_initiator_tag)
1595
self.checker_initiator_tag = (gobject.timeout_add
1596
(value, self.start_checker))
1597
self.start_checker() # Start one now, too
1598
1096
# Reschedule checker run
1097
gobject.source_remove(self.checker_initiator_tag)
1098
self.checker_initiator_tag = (gobject.timeout_add
1099
(value, self.start_checker))
1100
self.start_checker() # Start one now, too
1101
1599
1102
# Checker - property
1600
1103
@dbus_service_property(_interface, signature="s",
1601
1104
access="readwrite")
1602
1105
def Checker_dbus_property(self, value=None):
1603
1106
if value is None: # get
1604
1107
return dbus.String(self.checker_command)
1605
self.checker_command = unicode(value)
1108
self.checker_command = value
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Checker"),
1111
dbus.String(self.checker_command,
1112
variant_level=1))
1606
1113
1607
1114
# CheckerRunning - property
1608
1115
@dbus_service_property(_interface, signature="b",
1635
1142
self._pipe.send(('init', fpr, address))
1636
1143
if not self._pipe.recv():
1637
1144
raise KeyError()
1638
1145
1639
1146
def __getattribute__(self, name):
1640
if name == '_pipe':
1147
if(name == '_pipe'):
1641
1148
return super(ProxyClient, self).__getattribute__(name)
1642
1149
self._pipe.send(('getattr', name))
1643
1150
data = self._pipe.recv()
1648
1155
self._pipe.send(('funcall', name, args, kwargs))
1649
1156
return self._pipe.recv()[1]
1650
1157
return func
1651
1158
1652
1159
def __setattr__(self, name, value):
1653
if name == '_pipe':
1160
if(name == '_pipe'):
1654
1161
return super(ProxyClient, self).__setattr__(name, value)
1655
1162
self._pipe.send(('setattr', name, value))
1656
1163
1667
1174
unicode(self.client_address))
1668
1175
logger.debug("Pipe FD: %d",
1669
1176
self.server.child_pipe.fileno())
1670
1177
1671
1178
session = (gnutls.connection
1672
1179
.ClientSession(self.request,
1673
1180
gnutls.connection
1674
1181
.X509Credentials()))
1675
1182
1676
1183
# Note: gnutls.connection.X509Credentials is really a
1677
1184
# generic GnuTLS certificate credentials object so long as
1678
1185
# no X.509 keys are added to it. Therefore, we can use it
1679
1186
# here despite using OpenPGP certificates.
1680
1187
1681
1188
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1682
1189
# "+AES-256-CBC", "+SHA1",
1683
1190
# "+COMP-NULL", "+CTYPE-OPENPGP",
1689
1196
(gnutls.library.functions
1690
1197
.gnutls_priority_set_direct(session._c_object,
1691
1198
priority, None))
1692
1199
1693
1200
# Start communication using the Mandos protocol
1694
1201
# Get protocol number
1695
1202
line = self.request.makefile().readline()
1697
1204
try:
1698
1205
if int(line.strip().split()[0]) > 1:
1699
1206
raise RuntimeError
1700
except (ValueError, IndexError, RuntimeError) as error:
1207
except (ValueError, IndexError, RuntimeError), error:
1701
1208
logger.error("Unknown protocol version: %s", error)
1702
1209
return
1703
1210
1704
1211
# Start GnuTLS connection
1705
1212
try:
1706
1213
session.handshake()
1707
except gnutls.errors.GNUTLSError as error:
1214
except gnutls.errors.GNUTLSError, error:
1708
1215
logger.warning("Handshake failed: %s", error)
1709
1216
# Do not run session.bye() here: the session is not
1710
1217
# established. Just abandon the request.
1711
1218
return
1712
1219
logger.debug("Handshake succeeded")
1713
1220
1714
1221
approval_required = False
1715
1222
try:
1716
1223
try:
1717
1224
fpr = self.fingerprint(self.peer_certificate
1718
1225
(session))
1719
except (TypeError,
1720
gnutls.errors.GNUTLSError) as error:
1226
except (TypeError, gnutls.errors.GNUTLSError), error:
1721
1227
logger.warning("Bad certificate: %s", error)
1722
1228
return
1723
1229
logger.debug("Fingerprint: %s", fpr)
1724
1230
1725
1231
try:
1726
1232
client = ProxyClient(child_pipe, fpr,
1727
1233
self.client_address)
1735
1241
1736
1242
while True:
1737
1243
if not client.enabled:
1738
logger.info("Client %s is disabled",
1244
logger.warning("Client %s is disabled",
1739
1245
client.name)
1740
1246
if self.server.use_dbus:
1741
1247
# Emit D-Bus signal
1742
client.Rejected("Disabled")
1248
client.Rejected("Disabled")
1743
1249
return
1744
1250
1745
if client.approved or not client.approval_delay:
1251
if client._approved or not client.approval_delay:
1746
1252
#We are approved or approval is disabled
1747
1253
break
1748
elif client.approved is None:
1254
elif client._approved is None:
1749
1255
logger.info("Client %s needs approval",
1750
1256
client.name)
1751
1257
if self.server.use_dbus:
1762
1268
return
1763
1269
1764
1270
#wait until timeout or approved
1271
#x = float(client._timedelta_to_milliseconds(delay))
1765
1272
time = datetime.datetime.now()
1766
1273
client.changedstate.acquire()
1767
client.changedstate.wait(
1768
float(timedelta_to_milliseconds(delay)
1769
/ 1000))
1274
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1770
1275
client.changedstate.release()
1771
1276
time2 = datetime.datetime.now()
1772
1277
if (time2 - time) >= delay:
1787
1292
while sent_size < len(client.secret):
1788
1293
try:
1789
1294
sent = session.send(client.secret[sent_size:])
1790
except gnutls.errors.GNUTLSError as error:
1791
logger.warning("gnutls send failed",
1792
exc_info=error)
1295
except (gnutls.errors.GNUTLSError), error:
1296
logger.warning("gnutls send failed")
1793
1297
return
1794
1298
logger.debug("Sent: %d, remaining: %d",
1795
1299
sent, len(client.secret)
1796
1300
- (sent_size + sent))
1797
1301
sent_size += sent
1798
1302
1799
1303
logger.info("Sending secret to %s", client.name)
1800
# bump the timeout using extended_timeout
1801
client.bump_timeout(client.extended_timeout)
1304
# bump the timeout as if seen
1305
client.checked_ok()
1802
1306
if self.server.use_dbus:
1803
1307
# Emit D-Bus signal
1804
1308
client.GotSecret()
1808
1312
client.approvals_pending -= 1
1809
1313
try:
1810
1314
session.bye()
1811
except gnutls.errors.GNUTLSError as error:
1812
logger.warning("GnuTLS bye failed",
1813
exc_info=error)
1315
except (gnutls.errors.GNUTLSError), error:
1316
logger.warning("GnuTLS bye failed")
1814
1317
1815
1318
@staticmethod
1816
1319
def peer_certificate(session):
1872
1375
# Convert the buffer to a Python bytestring
1873
1376
fpr = ctypes.string_at(buf, buf_len.value)
1874
1377
# Convert the bytestring to hexadecimal notation
1875
hex_fpr = binascii.hexlify(fpr).upper()
1378
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1876
1379
return hex_fpr
1877
1380
1878
1381
1881
1384
def sub_process_main(self, request, address):
1882
1385
try:
1883
1386
self.finish_request(request, address)
1884
except Exception:
1387
except:
1885
1388
self.handle_error(request, address)
1886
1389
self.close_request(request)
1887
1390
1888
1391
def process_request(self, request, address):
1889
1392
"""Start a new process to process the request."""
1890
proc = multiprocessing.Process(target = self.sub_process_main,
1891
args = (request, address))
1892
proc.start()
1893
return proc
1894
1393
multiprocessing.Process(target = self.sub_process_main,
1394
args = (request, address)).start()
1895
1395
1896
1396
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1897
1397
""" adds a pipe to the MixIn """
1901
1401
This function creates a new pipe in self.pipe
1902
1402
"""
1903
1403
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1904
1905
proc = MultiprocessingMixIn.process_request(self, request,
1906
client_address)
1404
1405
super(MultiprocessingMixInWithPipe,
1406
self).process_request(request, client_address)
1907
1407
self.child_pipe.close()
1908
self.add_pipe(parent_pipe, proc)
1909
1910
def add_pipe(self, parent_pipe, proc):
1408
self.add_pipe(parent_pipe)
1409
1410
def add_pipe(self, parent_pipe):
1911
1411
"""Dummy function; override as necessary"""
1912
1412
raise NotImplementedError
1913
1413
1914
1915
1414
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1916
1415
socketserver.TCPServer, object):
1917
1416
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1922
1421
use_ipv6: Boolean; to use IPv6 or not
1923
1422
"""
1924
1423
def __init__(self, server_address, RequestHandlerClass,
1925
interface=None, use_ipv6=True, socketfd=None):
1926
"""If socketfd is set, use that file descriptor instead of
1927
creating a new one with socket.socket().
1928
"""
1424
interface=None, use_ipv6=True):
1929
1425
self.interface = interface
1930
1426
if use_ipv6:
1931
1427
self.address_family = socket.AF_INET6
1932
if socketfd is not None:
1933
# Save the file descriptor
1934
self.socketfd = socketfd
1935
# Save the original socket.socket() function
1936
self.socket_socket = socket.socket
1937
# To implement --socket, we monkey patch socket.socket.
1938
#
1939
# (When socketserver.TCPServer is a new-style class, we
1940
# could make self.socket into a property instead of monkey
1941
# patching socket.socket.)
1942
#
1943
# Create a one-time-only replacement for socket.socket()
1944
@functools.wraps(socket.socket)
1945
def socket_wrapper(*args, **kwargs):
1946
# Restore original function so subsequent calls are
1947
# not affected.
1948
socket.socket = self.socket_socket
1949
del self.socket_socket
1950
# This time only, return a new socket object from the
1951
# saved file descriptor.
1952
return socket.fromfd(self.socketfd, *args, **kwargs)
1953
# Replace socket.socket() function with wrapper
1954
socket.socket = socket_wrapper
1955
# The socketserver.TCPServer.__init__ will call
1956
# socket.socket(), which might be our replacement,
1957
# socket_wrapper(), if socketfd was set.
1958
1428
socketserver.TCPServer.__init__(self, server_address,
1959
1429
RequestHandlerClass)
1960
1961
1430
def server_bind(self):
1962
1431
"""This overrides the normal server_bind() function
1963
1432
to bind to an interface if one was specified, and also NOT to
1971
1440
try:
1972
1441
self.socket.setsockopt(socket.SOL_SOCKET,
1973
1442
SO_BINDTODEVICE,
1974
str(self.interface + '\0'))
1975
except socket.error as error:
1976
if error.errno == errno.EPERM:
1977
logger.error("No permission to bind to"
1978
" interface %s", self.interface)
1979
elif error.errno == errno.ENOPROTOOPT:
1443
str(self.interface
1444
+ '\0'))
1445
except socket.error, error:
1446
if error[0] == errno.EPERM:
1447
logger.error("No permission to"
1448
" bind to interface %s",
1449
self.interface)
1450
elif error[0] == errno.ENOPROTOOPT:
1980
1451
logger.error("SO_BINDTODEVICE not available;"
1981
1452
" cannot bind to interface %s",
1982
1453
self.interface)
1983
elif error.errno == errno.ENODEV:
1984
logger.error("Interface %s does not exist,"
1985
" cannot bind", self.interface)
1986
1454
else:
1987
1455
raise
1988
1456
# Only bind(2) the socket if we really need to.
1991
1459
if self.address_family == socket.AF_INET6:
1992
1460
any_address = "::" # in6addr_any
1993
1461
else:
1994
any_address = "0.0.0.0" # INADDR_ANY
1462
any_address = socket.INADDR_ANY
1995
1463
self.server_address = (any_address,
1996
1464
self.server_address[1])
1997
1465
elif not self.server_address[1]:
2018
1486
"""
2019
1487
def __init__(self, server_address, RequestHandlerClass,
2020
1488
interface=None, use_ipv6=True, clients=None,
2021
gnutls_priority=None, use_dbus=True, socketfd=None):
1489
gnutls_priority=None, use_dbus=True):
2022
1490
self.enabled = False
2023
1491
self.clients = clients
2024
1492
if self.clients is None:
2025
self.clients = {}
1493
self.clients = set()
2026
1494
self.use_dbus = use_dbus
2027
1495
self.gnutls_priority = gnutls_priority
2028
1496
IPv6_TCPServer.__init__(self, server_address,
2029
1497
RequestHandlerClass,
2030
1498
interface = interface,
2031
use_ipv6 = use_ipv6,
2032
socketfd = socketfd)
1499
use_ipv6 = use_ipv6)
2033
1500
def server_activate(self):
2034
1501
if self.enabled:
2035
1502
return socketserver.TCPServer.server_activate(self)
2036
2037
1503
def enable(self):
2038
1504
self.enabled = True
2039
2040
def add_pipe(self, parent_pipe, proc):
1505
def add_pipe(self, parent_pipe):
2041
1506
# Call "handle_ipc" for both data and EOF events
2042
1507
gobject.io_add_watch(parent_pipe.fileno(),
2043
1508
gobject.IO_IN | gobject.IO_HUP,
2044
1509
functools.partial(self.handle_ipc,
2045
parent_pipe =
2046
parent_pipe,
2047
proc = proc))
2048
1510
parent_pipe = parent_pipe))
1511
2049
1512
def handle_ipc(self, source, condition, parent_pipe=None,
2050
proc = None, client_object=None):
2051
# error, or the other end of multiprocessing.Pipe has closed
2052
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2053
# Wait for other process to exit
2054
proc.join()
1513
client_object=None):
1514
condition_names = {
1515
gobject.IO_IN: "IN", # There is data to read.
1516
gobject.IO_OUT: "OUT", # Data can be written (without
1517
# blocking).
1518
gobject.IO_PRI: "PRI", # There is urgent data to read.
1519
gobject.IO_ERR: "ERR", # Error condition.
1520
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1521
# broken, usually for pipes and
1522
# sockets).
1523
}
1524
conditions_string = ' | '.join(name
1525
for cond, name in
1526
condition_names.iteritems()
1527
if cond & condition)
1528
# error or the other end of multiprocessing.Pipe has closed
1529
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2055
1530
return False
2056
1531
2057
1532
# Read a request from the child
2062
1537
fpr = request[1]
2063
1538
address = request[2]
2064
1539
2065
for c in self.clients.itervalues():
1540
for c in self.clients:
2066
1541
if c.fingerprint == fpr:
2067
1542
client = c
2068
1543
break
2069
1544
else:
2070
logger.info("Client not found for fingerprint: %s, ad"
2071
"dress: %s", fpr, address)
1545
logger.warning("Client not found for fingerprint: %s, ad"
1546
"dress: %s", fpr, address)
2072
1547
if self.use_dbus:
2073
1548
# Emit D-Bus signal
2074
mandos_dbus_service.ClientNotFound(fpr,
2075
address[0])
1549
mandos_dbus_service.ClientNotFound(fpr, address[0])
2076
1550
parent_pipe.send(False)
2077
1551
return False
2078
1552
2079
1553
gobject.io_add_watch(parent_pipe.fileno(),
2080
1554
gobject.IO_IN | gobject.IO_HUP,
2081
1555
functools.partial(self.handle_ipc,
2082
parent_pipe =
2083
parent_pipe,
2084
proc = proc,
2085
client_object =
2086
client))
1556
parent_pipe = parent_pipe,
1557
client_object = client))
2087
1558
parent_pipe.send(True)
2088
# remove the old hook in favor of the new above hook on
2089
# same fileno
1559
# remove the old hook in favor of the new above hook on same fileno
2090
1560
return False
2091
1561
if command == 'funcall':
2092
1562
funcname = request[1]
2093
1563
args = request[2]
2094
1564
kwargs = request[3]
2095
1565
2096
parent_pipe.send(('data', getattr(client_object,
2097
funcname)(*args,
2098
**kwargs)))
2099
1566
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1567
2100
1568
if command == 'getattr':
2101
1569
attrname = request[1]
2102
1570
if callable(client_object.__getattribute__(attrname)):
2103
1571
parent_pipe.send(('function',))
2104
1572
else:
2105
parent_pipe.send(('data', client_object
2106
.__getattribute__(attrname)))
1573
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2107
1574
2108
1575
if command == 'setattr':
2109
1576
attrname = request[1]
2110
1577
value = request[2]
2111
1578
setattr(client_object, attrname, value)
2112
1579
2113
1580
return True
2114
1581
2115
1582
2116
def rfc3339_duration_to_delta(duration):
2117
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2118
2119
>>> rfc3339_duration_to_delta("P7D")
2120
datetime.timedelta(7)
2121
>>> rfc3339_duration_to_delta("PT60S")
2122
datetime.timedelta(0, 60)
2123
>>> rfc3339_duration_to_delta("PT60M")
2124
datetime.timedelta(0, 3600)
2125
>>> rfc3339_duration_to_delta("PT24H")
2126
datetime.timedelta(1)
2127
>>> rfc3339_duration_to_delta("P1W")
2128
datetime.timedelta(7)
2129
>>> rfc3339_duration_to_delta("PT5M30S")
2130
datetime.timedelta(0, 330)
2131
>>> rfc3339_duration_to_delta("P1DT3M20S")
2132
datetime.timedelta(1, 200)
2133
"""
2134
2135
# Parsing an RFC 3339 duration with regular expressions is not
2136
# possible - there would have to be multiple places for the same
2137
# values, like seconds. The current code, while more esoteric, is
2138
# cleaner without depending on a parsing library. If Python had a
2139
# built-in library for parsing we would use it, but we'd like to
2140
# avoid excessive use of external libraries.
2141
2142
# New type for defining tokens, syntax, and semantics all-in-one
2143
Token = collections.namedtuple("Token",
2144
("regexp", # To match token; if
2145
# "value" is not None,
2146
# must have a "group"
2147
# containing digits
2148
"value", # datetime.timedelta or
2149
# None
2150
"followers")) # Tokens valid after
2151
# this token
2152
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2153
# the "duration" ABNF definition in RFC 3339, Appendix A.
2154
token_end = Token(re.compile(r"$"), None, frozenset())
2155
token_second = Token(re.compile(r"(\d+)S"),
2156
datetime.timedelta(seconds=1),
2157
frozenset((token_end,)))
2158
token_minute = Token(re.compile(r"(\d+)M"),
2159
datetime.timedelta(minutes=1),
2160
frozenset((token_second, token_end)))
2161
token_hour = Token(re.compile(r"(\d+)H"),
2162
datetime.timedelta(hours=1),
2163
frozenset((token_minute, token_end)))
2164
token_time = Token(re.compile(r"T"),
2165
None,
2166
frozenset((token_hour, token_minute,
2167
token_second)))
2168
token_day = Token(re.compile(r"(\d+)D"),
2169
datetime.timedelta(days=1),
2170
frozenset((token_time, token_end)))
2171
token_month = Token(re.compile(r"(\d+)M"),
2172
datetime.timedelta(weeks=4),
2173
frozenset((token_day, token_end)))
2174
token_year = Token(re.compile(r"(\d+)Y"),
2175
datetime.timedelta(weeks=52),
2176
frozenset((token_month, token_end)))
2177
token_week = Token(re.compile(r"(\d+)W"),
2178
datetime.timedelta(weeks=1),
2179
frozenset((token_end,)))
2180
token_duration = Token(re.compile(r"P"), None,
2181
frozenset((token_year, token_month,
2182
token_day, token_time,
2183
token_week))),
2184
# Define starting values
2185
value = datetime.timedelta() # Value so far
2186
found_token = None
2187
followers = frozenset(token_duration,) # Following valid tokens
2188
s = duration # String left to parse
2189
# Loop until end token is found
2190
while found_token is not token_end:
2191
# Search for any currently valid tokens
2192
for token in followers:
2193
match = token.regexp.match(s)
2194
if match is not None:
2195
# Token found
2196
if token.value is not None:
2197
# Value found, parse digits
2198
factor = int(match.group(1), 10)
2199
# Add to value so far
2200
value += factor * token.value
2201
# Strip token from string
2202
s = token.regexp.sub("", s, 1)
2203
# Go to found token
2204
found_token = token
2205
# Set valid next tokens
2206
followers = found_token.followers
2207
break
2208
else:
2209
# No currently valid tokens were found
2210
raise ValueError("Invalid RFC 3339 duration")
2211
# End token found
2212
return value
2213
2214
2215
1583
def string_to_delta(interval):
2216
1584
"""Parse a string and return a datetime.timedelta
2217
1585
2228
1596
>>> string_to_delta('5m 30s')
2229
1597
datetime.timedelta(0, 330)
2230
1598
"""
2231
2232
try:
2233
return rfc3339_duration_to_delta(interval)
2234
except ValueError:
2235
pass
2236
2237
1599
timevalue = datetime.timedelta(0)
2238
1600
for s in interval.split():
2239
1601
try:
2250
1612
elif suffix == "w":
2251
1613
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2252
1614
else:
2253
raise ValueError("Unknown suffix {0!r}"
2254
.format(suffix))
2255
except (ValueError, IndexError) as e:
1615
raise ValueError("Unknown suffix %r" % suffix)
1616
except (ValueError, IndexError), e:
2256
1617
raise ValueError(*(e.args))
2257
1618
timevalue += delta
2258
1619
return timevalue
2259
1620
2260
1621
1622
def if_nametoindex(interface):
1623
"""Call the C function if_nametoindex(), or equivalent
1624
1625
Note: This function cannot accept a unicode string."""
1626
global if_nametoindex
1627
try:
1628
if_nametoindex = (ctypes.cdll.LoadLibrary
1629
(ctypes.util.find_library("c"))
1630
.if_nametoindex)
1631
except (OSError, AttributeError):
1632
logger.warning("Doing if_nametoindex the hard way")
1633
def if_nametoindex(interface):
1634
"Get an interface index the hard way, i.e. using fcntl()"
1635
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1636
with contextlib.closing(socket.socket()) as s:
1637
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
struct.pack(str("16s16x"),
1639
interface))
1640
interface_index = struct.unpack(str("I"),
1641
ifreq[16:20])[0]
1642
return interface_index
1643
return if_nametoindex(interface)
1644
1645
2261
1646
def daemon(nochdir = False, noclose = False):
2262
1647
"""See daemon(3). Standard BSD Unix function.
2263
1648
2271
1656
sys.exit()
2272
1657
if not noclose:
2273
1658
# Close all standard open file descriptors
2274
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1659
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2275
1660
if not stat.S_ISCHR(os.fstat(null).st_mode):
2276
1661
raise OSError(errno.ENODEV,
2277
"{0} not a character device"
2278
.format(os.devnull))
1662
"%s not a character device"
1663
% os.path.devnull)
2279
1664
os.dup2(null, sys.stdin.fileno())
2280
1665
os.dup2(null, sys.stdout.fileno())
2281
1666
os.dup2(null, sys.stderr.fileno())
2288
1673
##################################################################
2289
1674
# Parsing of options, both command line and config file
2290
1675
2291
parser = argparse.ArgumentParser()
2292
parser.add_argument("-v", "--version", action="version",
2293
version = "%(prog)s {0}".format(version),
2294
help="show version number and exit")
2295
parser.add_argument("-i", "--interface", metavar="IF",
2296
help="Bind to interface IF")
2297
parser.add_argument("-a", "--address",
2298
help="Address to listen for requests on")
2299
parser.add_argument("-p", "--port", type=int,
2300
help="Port number to receive requests on")
2301
parser.add_argument("--check", action="store_true",
2302
help="Run self-test")
2303
parser.add_argument("--debug", action="store_true",
2304
help="Debug mode; run in foreground and log"
2305
" to terminal", default=None)
2306
parser.add_argument("--debuglevel", metavar="LEVEL",
2307
help="Debug level for stdout output")
2308
parser.add_argument("--priority", help="GnuTLS"
2309
" priority string (see GnuTLS documentation)")
2310
parser.add_argument("--servicename",
2311
metavar="NAME", help="Zeroconf service name")
2312
parser.add_argument("--configdir",
2313
default="/etc/mandos", metavar="DIR",
2314
help="Directory to search for configuration"
2315
" files")
2316
parser.add_argument("--no-dbus", action="store_false",
2317
dest="use_dbus", help="Do not provide D-Bus"
2318
" system bus interface", default=None)
2319
parser.add_argument("--no-ipv6", action="store_false",
2320
dest="use_ipv6", help="Do not use IPv6",
2321
default=None)
2322
parser.add_argument("--no-restore", action="store_false",
2323
dest="restore", help="Do not restore stored"
2324
" state", default=None)
2325
parser.add_argument("--socket", type=int,
2326
help="Specify a file descriptor to a network"
2327
" socket to use instead of creating one")
2328
parser.add_argument("--statedir", metavar="DIR",
2329
help="Directory to save/restore state in")
2330
parser.add_argument("--foreground", action="store_true",
2331
help="Run in foreground", default=None)
2332
2333
options = parser.parse_args()
1676
parser = optparse.OptionParser(version = "%%prog %s" % version)
1677
parser.add_option("-i", "--interface", type="string",
1678
metavar="IF", help="Bind to interface IF")
1679
parser.add_option("-a", "--address", type="string",
1680
help="Address to listen for requests on")
1681
parser.add_option("-p", "--port", type="int",
1682
help="Port number to receive requests on")
1683
parser.add_option("--check", action="store_true",
1684
help="Run self-test")
1685
parser.add_option("--debug", action="store_true",
1686
help="Debug mode; run in foreground and log to"
1687
" terminal")
1688
parser.add_option("--debuglevel", type="string", metavar="LEVEL",
1689
help="Debug level for stdout output")
1690
parser.add_option("--priority", type="string", help="GnuTLS"
1691
" priority string (see GnuTLS documentation)")
1692
parser.add_option("--servicename", type="string",
1693
metavar="NAME", help="Zeroconf service name")
1694
parser.add_option("--configdir", type="string",
1695
default="/etc/mandos", metavar="DIR",
1696
help="Directory to search for configuration"
1697
" files")
1698
parser.add_option("--no-dbus", action="store_false",
1699
dest="use_dbus", help="Do not provide D-Bus"
1700
" system bus interface")
1701
parser.add_option("--no-ipv6", action="store_false",
1702
dest="use_ipv6", help="Do not use IPv6")
1703
options = parser.parse_args()[0]
2334
1704
2335
1705
if options.check:
2336
1706
import doctest
2343
1713
"port": "",
2344
1714
"debug": "False",
2345
1715
"priority":
2346
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224",
1716
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2347
1717
"servicename": "Mandos",
2348
1718
"use_dbus": "True",
2349
1719
"use_ipv6": "True",
2350
1720
"debuglevel": "",
2351
"restore": "True",
2352
"socket": "",
2353
"statedir": "/var/lib/mandos",
2354
"foreground": "False",
2355
1721
}
2356
1722
2357
1723
# Parse config file for server-global settings
2362
1728
# Convert the SafeConfigParser object to a dict
2363
1729
server_settings = server_config.defaults()
2364
1730
# Use the appropriate methods on the non-string config options
2365
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1731
for option in ("debug", "use_dbus", "use_ipv6"):
2366
1732
server_settings[option] = server_config.getboolean("DEFAULT",
2367
1733
option)
2368
1734
if server_settings["port"]:
2369
1735
server_settings["port"] = server_config.getint("DEFAULT",
2370
1736
"port")
2371
if server_settings["socket"]:
2372
server_settings["socket"] = server_config.getint("DEFAULT",
2373
"socket")
2374
# Later, stdin will, and stdout and stderr might, be dup'ed
2375
# over with an opened os.devnull. But we don't want this to
2376
# happen with a supplied network socket.
2377
if 0 <= server_settings["socket"] <= 2:
2378
server_settings["socket"] = os.dup(server_settings
2379
["socket"])
2380
1737
del server_config
2381
1738
2382
1739
# Override the settings from the config file with command line
2383
1740
# options, if set.
2384
1741
for option in ("interface", "address", "port", "debug",
2385
1742
"priority", "servicename", "configdir",
2386
"use_dbus", "use_ipv6", "debuglevel", "restore",
2387
"statedir", "socket", "foreground"):
1743
"use_dbus", "use_ipv6", "debuglevel"):
2388
1744
value = getattr(options, option)
2389
1745
if value is not None:
2390
1746
server_settings[option] = value
2393
1749
for option in server_settings.keys():
2394
1750
if type(server_settings[option]) is str:
2395
1751
server_settings[option] = unicode(server_settings[option])
2396
# Force all boolean options to be boolean
2397
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2398
"foreground"):
2399
server_settings[option] = bool(server_settings[option])
2400
# Debug implies foreground
2401
if server_settings["debug"]:
2402
server_settings["foreground"] = True
2403
1752
# Now we have our good server settings in "server_settings"
2404
1753
2405
1754
##################################################################
2409
1758
debuglevel = server_settings["debuglevel"]
2410
1759
use_dbus = server_settings["use_dbus"]
2411
1760
use_ipv6 = server_settings["use_ipv6"]
2412
stored_state_path = os.path.join(server_settings["statedir"],
2413
stored_state_file)
2414
foreground = server_settings["foreground"]
2415
2416
if debug:
2417
initlogger(debug, logging.DEBUG)
2418
else:
2419
if not debuglevel:
2420
initlogger(debug)
2421
else:
2422
level = getattr(logging, debuglevel.upper())
2423
initlogger(debug, level)
2424
1761
2425
1762
if server_settings["servicename"] != "Mandos":
2426
1763
syslogger.setFormatter(logging.Formatter
2427
('Mandos ({0}) [%(process)d]:'
2428
' %(levelname)s: %(message)s'
2429
.format(server_settings
2430
["servicename"])))
1764
('Mandos (%s) [%%(process)d]:'
1765
' %%(levelname)s: %%(message)s'
1766
% server_settings["servicename"]))
2431
1767
2432
1768
# Parse config file with clients
2433
client_config = configparser.SafeConfigParser(Client
2434
.client_defaults)
1769
client_defaults = { "timeout": "1h",
1770
"interval": "5m",
1771
"checker": "fping -q -- %%(host)s",
1772
"host": "",
1773
"approval_delay": "0s",
1774
"approval_duration": "1s",
1775
}
1776
client_config = configparser.SafeConfigParser(client_defaults)
2435
1777
client_config.read(os.path.join(server_settings["configdir"],
2436
1778
"clients.conf"))
2437
1779
2446
1788
use_ipv6=use_ipv6,
2447
1789
gnutls_priority=
2448
1790
server_settings["priority"],
2449
use_dbus=use_dbus,
2450
socketfd=(server_settings["socket"]
2451
or None))
2452
if not foreground:
2453
pidfilename = "/run/mandos.pid"
2454
pidfile = None
1791
use_dbus=use_dbus)
1792
if not debug:
1793
pidfilename = "/var/run/mandos.pid"
2455
1794
try:
2456
1795
pidfile = open(pidfilename, "w")
2457
except IOError as e:
2458
logger.error("Could not open file %r", pidfilename,
2459
exc_info=e)
1796
except IOError:
1797
logger.error("Could not open file %r", pidfilename)
2460
1798
2461
for name in ("_mandos", "mandos", "nobody"):
1799
try:
1800
uid = pwd.getpwnam("_mandos").pw_uid
1801
gid = pwd.getpwnam("_mandos").pw_gid
1802
except KeyError:
2462
1803
try:
2463
uid = pwd.getpwnam(name).pw_uid
2464
gid = pwd.getpwnam(name).pw_gid
2465
break
1804
uid = pwd.getpwnam("mandos").pw_uid
1805
gid = pwd.getpwnam("mandos").pw_gid
2466
1806
except KeyError:
2467
continue
2468
else:
2469
uid = 65534
2470
gid = 65534
1807
try:
1808
uid = pwd.getpwnam("nobody").pw_uid
1809
gid = pwd.getpwnam("nobody").pw_gid
1810
except KeyError:
1811
uid = 65534
1812
gid = 65534
2471
1813
try:
2472
1814
os.setgid(gid)
2473
1815
os.setuid(uid)
2474
except OSError as error:
2475
if error.errno != errno.EPERM:
1816
except OSError, error:
1817
if error[0] != errno.EPERM:
2476
1818
raise error
2477
1819
1820
if not debug and not debuglevel:
1821
syslogger.setLevel(logging.WARNING)
1822
console.setLevel(logging.WARNING)
1823
if debuglevel:
1824
level = getattr(logging, debuglevel.upper())
1825
syslogger.setLevel(level)
1826
console.setLevel(level)
1827
2478
1828
if debug:
2479
1829
# Enable all possible GnuTLS debugging
2480
1830
2490
1840
.gnutls_global_set_log_function(debug_gnutls))
2491
1841
2492
1842
# Redirect stdin so all checkers get /dev/null
2493
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1843
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2494
1844
os.dup2(null, sys.stdin.fileno())
2495
1845
if null > 2:
2496
1846
os.close(null)
1847
else:
1848
# No console logging
1849
logger.removeHandler(console)
2497
1850
2498
1851
# Need to fork before connecting to D-Bus
2499
if not foreground:
1852
if not debug:
2500
1853
# Close all input and output, do double fork, etc.
2501
1854
daemon()
2502
1855
2503
# multiprocessing will use threads, so before we use gobject we
2504
# need to inform gobject that threads will be used.
2505
gobject.threads_init()
2506
2507
1856
global main_loop
2508
1857
# From the Avahi example code
2509
DBusGMainLoop(set_as_default=True)
1858
DBusGMainLoop(set_as_default=True )
2510
1859
main_loop = gobject.MainLoop()
2511
1860
bus = dbus.SystemBus()
2512
1861
# End of Avahi example code
2513
1862
if use_dbus:
2514
1863
try:
2515
bus_name = dbus.service.BusName("se.recompile.Mandos",
1864
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2516
1865
bus, do_not_queue=True)
2517
old_bus_name = (dbus.service.BusName
2518
("se.bsnet.fukt.Mandos", bus,
2519
do_not_queue=True))
2520
except dbus.exceptions.NameExistsException as e:
2521
logger.error("Disabling D-Bus:", exc_info=e)
1866
except dbus.exceptions.NameExistsException, e:
1867
logger.error(unicode(e) + ", disabling D-Bus")
2522
1868
use_dbus = False
2523
1869
server_settings["use_dbus"] = False
2524
1870
tcp_server.use_dbus = False
2525
1871
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2526
service = AvahiServiceToSyslog(name =
2527
server_settings["servicename"],
2528
servicetype = "_mandos._tcp",
2529
protocol = protocol, bus = bus)
1872
service = AvahiService(name = server_settings["servicename"],
1873
servicetype = "_mandos._tcp",
1874
protocol = protocol, bus = bus)
2530
1875
if server_settings["interface"]:
2531
1876
service.interface = (if_nametoindex
2532
1877
(str(server_settings["interface"])))
2537
1882
client_class = Client
2538
1883
if use_dbus:
2539
1884
client_class = functools.partial(ClientDBus, bus = bus)
2540
2541
client_settings = Client.config_parser(client_config)
2542
old_client_settings = {}
2543
clients_data = {}
2544
2545
# This is used to redirect stdout and stderr for checker processes
2546
global wnull
2547
wnull = open(os.devnull, "w") # A writable /dev/null
2548
# Only used if server is running in foreground but not in debug
2549
# mode
2550
if debug or not foreground:
2551
wnull.close()
2552
2553
# Get client data and settings from last running state.
2554
if server_settings["restore"]:
2555
try:
2556
with open(stored_state_path, "rb") as stored_state:
2557
clients_data, old_client_settings = (pickle.load
2558
(stored_state))
2559
os.remove(stored_state_path)
2560
except IOError as e:
2561
if e.errno == errno.ENOENT:
2562
logger.warning("Could not load persistent state: {0}"
2563
.format(os.strerror(e.errno)))
2564
else:
2565
logger.critical("Could not load persistent state:",
2566
exc_info=e)
2567
raise
2568
except EOFError as e:
2569
logger.warning("Could not load persistent state: "
2570
"EOFError:", exc_info=e)
2571
2572
with PGPEngine() as pgp:
2573
for client_name, client in clients_data.iteritems():
2574
# Skip removed clients
2575
if client_name not in client_settings:
2576
continue
2577
2578
# Decide which value to use after restoring saved state.
2579
# We have three different values: Old config file,
2580
# new config file, and saved state.
2581
# New config value takes precedence if it differs from old
2582
# config value, otherwise use saved state.
2583
for name, value in client_settings[client_name].items():
2584
try:
2585
# For each value in new config, check if it
2586
# differs from the old config value (Except for
2587
# the "secret" attribute)
2588
if (name != "secret" and
2589
value != old_client_settings[client_name]
2590
[name]):
2591
client[name] = value
2592
except KeyError:
2593
pass
2594
2595
# Clients who has passed its expire date can still be
2596
# enabled if its last checker was successful. Clients
2597
# whose checker succeeded before we stored its state is
2598
# assumed to have successfully run all checkers during
2599
# downtime.
2600
if client["enabled"]:
2601
if datetime.datetime.utcnow() >= client["expires"]:
2602
if not client["last_checked_ok"]:
2603
logger.warning(
2604
"disabling client {0} - Client never "
2605
"performed a successful checker"
2606
.format(client_name))
2607
client["enabled"] = False
2608
elif client["last_checker_status"] != 0:
2609
logger.warning(
2610
"disabling client {0} - Client "
2611
"last checker failed with error code {1}"
2612
.format(client_name,
2613
client["last_checker_status"]))
2614
client["enabled"] = False
2615
else:
2616
client["expires"] = (datetime.datetime
2617
.utcnow()
2618
+ client["timeout"])
2619
logger.debug("Last checker succeeded,"
2620
" keeping {0} enabled"
2621
.format(client_name))
1885
def client_config_items(config, section):
1886
special_settings = {
1887
"approved_by_default":
1888
lambda: config.getboolean(section,
1889
"approved_by_default"),
1890
}
1891
for name, value in config.items(section):
2622
1892
try:
2623
client["secret"] = (
2624
pgp.decrypt(client["encrypted_secret"],
2625
client_settings[client_name]
2626
["secret"]))
2627
except PGPError:
2628
# If decryption fails, we use secret from new settings
2629
logger.debug("Failed to decrypt {0} old secret"
2630
.format(client_name))
2631
client["secret"] = (
2632
client_settings[client_name]["secret"])
2633
2634
# Add/remove clients based on new changes made to config
2635
for client_name in (set(old_client_settings)
2636
- set(client_settings)):
2637
del clients_data[client_name]
2638
for client_name in (set(client_settings)
2639
- set(old_client_settings)):
2640
clients_data[client_name] = client_settings[client_name]
2641
2642
# Create all client objects
2643
for client_name, client in clients_data.iteritems():
2644
tcp_server.clients[client_name] = client_class(
2645
name = client_name, settings = client,
2646
server_settings = server_settings)
2647
1893
yield (name, special_settings[name]())
1894
except KeyError:
1895
yield (name, value)
1896
1897
tcp_server.clients.update(set(
1898
client_class(name = section,
1899
config= dict(client_config_items(
1900
client_config, section)))
1901
for section in client_config.sections()))
2648
1902
if not tcp_server.clients:
2649
1903
logger.warning("No clients defined")
2650
2651
if not foreground:
2652
if pidfile is not None:
2653
try:
2654
with pidfile:
2655
pid = os.getpid()
2656
pidfile.write(str(pid) + "\n".encode("utf-8"))
2657
except IOError:
2658
logger.error("Could not write to file %r with PID %d",
2659
pidfilename, pid)
2660
del pidfile
1904
1905
if not debug:
1906
try:
1907
with pidfile:
1908
pid = os.getpid()
1909
pidfile.write(str(pid) + "\n".encode("utf-8"))
1910
del pidfile
1911
except IOError:
1912
logger.error("Could not write to file %r with PID %d",
1913
pidfilename, pid)
1914
except NameError:
1915
# "pidfile" was never created
1916
pass
2661
1917
del pidfilename
2662
1918
1919
signal.signal(signal.SIGINT, signal.SIG_IGN)
1920
2663
1921
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2664
1922
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2665
1923
2666
1924
if use_dbus:
2667
@alternate_dbus_interfaces({"se.recompile.Mandos":
2668
"se.bsnet.fukt.Mandos"})
2669
class MandosDBusService(DBusObjectWithProperties):
1925
class MandosDBusService(dbus.service.Object):
2670
1926
"""A D-Bus proxy object"""
2671
1927
def __init__(self):
2672
1928
dbus.service.Object.__init__(self, bus, "/")
2673
_interface = "se.recompile.Mandos"
2674
2675
@dbus_interface_annotations(_interface)
2676
def _foo(self):
2677
return { "org.freedesktop.DBus.Property"
2678
".EmitsChangedSignal":
2679
"false"}
1929
_interface = "se.bsnet.fukt.Mandos"
2680
1930
2681
1931
@dbus.service.signal(_interface, signature="o")
2682
1932
def ClientAdded(self, objpath):
2697
1947
def GetAllClients(self):
2698
1948
"D-Bus method"
2699
1949
return dbus.Array(c.dbus_object_path
2700
for c in
2701
tcp_server.clients.itervalues())
1950
for c in tcp_server.clients)
2702
1951
2703
1952
@dbus.service.method(_interface,
2704
1953
out_signature="a{oa{sv}}")
2706
1955
"D-Bus method"
2707
1956
return dbus.Dictionary(
2708
1957
((c.dbus_object_path, c.GetAll(""))
2709
for c in tcp_server.clients.itervalues()),
1958
for c in tcp_server.clients),
2710
1959
signature="oa{sv}")
2711
1960
2712
1961
@dbus.service.method(_interface, in_signature="o")
2713
1962
def RemoveClient(self, object_path):
2714
1963
"D-Bus method"
2715
for c in tcp_server.clients.itervalues():
1964
for c in tcp_server.clients:
2716
1965
if c.dbus_object_path == object_path:
2717
del tcp_server.clients[c.name]
1966
tcp_server.clients.remove(c)
2718
1967
c.remove_from_connection()
2719
1968
# Don't signal anything except ClientRemoved
2720
1969
c.disable(quiet=True)
2731
1980
"Cleanup function; run on exit"
2732
1981
service.cleanup()
2733
1982
2734
multiprocessing.active_children()
2735
wnull.close()
2736
if not (tcp_server.clients or client_settings):
2737
return
2738
2739
# Store client before exiting. Secrets are encrypted with key
2740
# based on what config file has. If config file is
2741
# removed/edited, old secret will thus be unrecovable.
2742
clients = {}
2743
with PGPEngine() as pgp:
2744
for client in tcp_server.clients.itervalues():
2745
key = client_settings[client.name]["secret"]
2746
client.encrypted_secret = pgp.encrypt(client.secret,
2747
key)
2748
client_dict = {}
2749
2750
# A list of attributes that can not be pickled
2751
# + secret.
2752
exclude = set(("bus", "changedstate", "secret",
2753
"checker", "server_settings"))
2754
for name, typ in (inspect.getmembers
2755
(dbus.service.Object)):
2756
exclude.add(name)
2757
2758
client_dict["encrypted_secret"] = (client
2759
.encrypted_secret)
2760
for attr in client.client_structure:
2761
if attr not in exclude:
2762
client_dict[attr] = getattr(client, attr)
2763
2764
clients[client.name] = client_dict
2765
del client_settings[client.name]["secret"]
2766
2767
try:
2768
with (tempfile.NamedTemporaryFile
2769
(mode='wb', suffix=".pickle", prefix='clients-',
2770
dir=os.path.dirname(stored_state_path),
2771
delete=False)) as stored_state:
2772
pickle.dump((clients, client_settings), stored_state)
2773
tempname=stored_state.name
2774
os.rename(tempname, stored_state_path)
2775
except (IOError, OSError) as e:
2776
if not debug:
2777
try:
2778
os.remove(tempname)
2779
except NameError:
2780
pass
2781
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2782
logger.warning("Could not save persistent state: {0}"
2783
.format(os.strerror(e.errno)))
2784
else:
2785
logger.warning("Could not save persistent state:",
2786
exc_info=e)
2787
raise e
2788
2789
# Delete all clients, and settings from config
2790
1983
while tcp_server.clients:
2791
name, client = tcp_server.clients.popitem()
1984
client = tcp_server.clients.pop()
2792
1985
if use_dbus:
2793
1986
client.remove_from_connection()
1987
client.disable_hook = None
2794
1988
# Don't signal anything except ClientRemoved
2795
1989
client.disable(quiet=True)
2796
1990
if use_dbus:
2797
1991
# Emit D-Bus signal
2798
mandos_dbus_service.ClientRemoved(client
2799
.dbus_object_path,
1992
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2800
1993
client.name)
2801
client_settings.clear()
2802
1994
2803
1995
atexit.register(cleanup)
2804
1996
2805
for client in tcp_server.clients.itervalues():
1997
for client in tcp_server.clients:
2806
1998
if use_dbus:
2807
1999
# Emit D-Bus signal
2808
2000
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2809
# Need to initiate checking of clients
2810
if client.enabled:
2811
client.init_checker()
2001
client.enable()
2812
2002
2813
2003
tcp_server.enable()
2814
2004
tcp_server.server_activate()
2817
2007
service.port = tcp_server.socket.getsockname()[1]
2818
2008
if use_ipv6:
2819
2009
logger.info("Now listening on address %r, port %d,"
2820
" flowinfo %d, scope_id %d",
2821
*tcp_server.socket.getsockname())
2010
" flowinfo %d, scope_id %d"
2011
% tcp_server.socket.getsockname())
2822
2012
else: # IPv4
2823
logger.info("Now listening on address %r, port %d",
2824
*tcp_server.socket.getsockname())
2013
logger.info("Now listening on address %r, port %d"
2014
% tcp_server.socket.getsockname())
2825
2015
2826
2016
#service.interface = tcp_server.socket.getsockname()[3]
2827
2017
2829
2019
# From the Avahi example code
2830
2020
try:
2831
2021
service.activate()
2832
except dbus.exceptions.DBusException as error:
2833
logger.critical("D-Bus Exception", exc_info=error)
2022
except dbus.exceptions.DBusException, error:
2023
logger.critical("DBusException: %s", error)
2834
2024
cleanup()
2835
2025
sys.exit(1)
2836
2026
# End of Avahi example code
2842
2032
2843
2033
logger.debug("Starting main loop")
2844
2034
main_loop.run()
2845
except AvahiError as error:
2846
logger.critical("Avahi Error", exc_info=error)
2035
except AvahiError, error:
2036
logger.critical("AvahiError: %s", error)
2847
2037
cleanup()
2848
2038
sys.exit(1)
2849
2039
except KeyboardInterrupt:
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