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- Committer: Teddy Hogeborn
- Date: 2011-07-13 02:24:39 UTC
- mfrom: (24.1.174 mandos)
- Revision ID: teddy@fukt.bsnet.se-20110713022439-wbv6kghshdsc2x24
Merge from Björn.
- 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
#
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# Everything else is
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# Copyright © 2008-2014 Teddy Hogeborn
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# Copyright © 2008-2014 Björn Påhlsson
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# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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#
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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
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# <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@recompile.se>.
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# 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
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import socket
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39
import argparse
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62
import functools
65
63
import cPickle as pickle
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64
import multiprocessing
67
import types
68
import binascii
69
import tempfile
70
import itertools
71
import collections
72
65
73
66
import dbus
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67
import dbus.service
88
81
except ImportError:
89
82
SO_BINDTODEVICE = None
90
83
91
version = "1.6.3"
92
stored_state_file = "clients.pickle"
93
94
logger = logging.getLogger()
84
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version = "1.3.0"
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#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
encoded = b"mandos" + binascii.hexlify(password)
176
if len(encoded) > 2048:
177
# GnuPG can't handle long passwords, so encode differently
178
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
179
.replace(b"\n", b"\\n")
180
.replace(b"\0", b"\\x00"))
181
return encoded
182
183
def encrypt(self, data, password):
184
passphrase = self.password_encode(password)
185
with tempfile.NamedTemporaryFile(dir=self.tempdir
186
) as passfile:
187
passfile.write(passphrase)
188
passfile.flush()
189
proc = subprocess.Popen(['gpg', '--symmetric',
190
'--passphrase-file',
191
passfile.name]
192
+ self.gnupgargs,
193
stdin = subprocess.PIPE,
194
stdout = subprocess.PIPE,
195
stderr = subprocess.PIPE)
196
ciphertext, err = proc.communicate(input = data)
197
if proc.returncode != 0:
198
raise PGPError(err)
199
return ciphertext
200
201
def decrypt(self, data, password):
202
passphrase = self.password_encode(password)
203
with tempfile.NamedTemporaryFile(dir = self.tempdir
204
) as passfile:
205
passfile.write(passphrase)
206
passfile.flush()
207
proc = subprocess.Popen(['gpg', '--decrypt',
208
'--passphrase-file',
209
passfile.name]
210
+ self.gnupgargs,
211
stdin = subprocess.PIPE,
212
stdout = subprocess.PIPE,
213
stderr = subprocess.PIPE)
214
decrypted_plaintext, err = proc.communicate(input
215
= data)
216
if proc.returncode != 0:
217
raise PGPError(err)
218
return decrypted_plaintext
219
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)
220
102
221
103
class AvahiError(Exception):
222
104
def __init__(self, value, *args, **kwargs):
240
122
Used to optionally bind to the specified interface.
241
123
name: string; Example: 'Mandos'
242
124
type: string; Example: '_mandos._tcp'.
243
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
244
126
port: integer; what port to announce
245
127
TXT: list of strings; TXT record for the service
246
128
domain: string; Domain to publish on, default to .local if empty.
252
134
server: D-Bus Server
253
135
bus: dbus.SystemBus()
254
136
"""
255
256
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
257
138
servicetype = None, port = None, TXT = None,
258
139
domain = "", host = "", max_renames = 32768,
271
152
self.server = None
272
153
self.bus = bus
273
154
self.entry_group_state_changed_match = None
274
275
155
def rename(self):
276
156
"""Derived from the Avahi example code"""
277
157
if self.rename_count >= self.max_renames:
279
159
" after %i retries, exiting.",
280
160
self.rename_count)
281
161
raise AvahiServiceError("Too many renames")
282
self.name = unicode(self.server
283
.GetAlternativeServiceName(self.name))
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
284
163
logger.info("Changing Zeroconf service name to %r ...",
285
164
self.name)
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
286
169
self.remove()
287
170
try:
288
171
self.add()
289
172
except dbus.exceptions.DBusException as error:
290
logger.critical("D-Bus Exception", exc_info=error)
173
logger.critical("DBusException: %s", error)
291
174
self.cleanup()
292
175
os._exit(1)
293
176
self.rename_count += 1
294
295
177
def remove(self):
296
178
"""Derived from the Avahi example code"""
297
179
if self.entry_group_state_changed_match is not None:
299
181
self.entry_group_state_changed_match = None
300
182
if self.group is not None:
301
183
self.group.Reset()
302
303
184
def add(self):
304
185
"""Derived from the Avahi example code"""
305
186
self.remove()
310
191
avahi.DBUS_INTERFACE_ENTRY_GROUP)
311
192
self.entry_group_state_changed_match = (
312
193
self.group.connect_to_signal(
313
'StateChanged', self.entry_group_state_changed))
194
'StateChanged', self .entry_group_state_changed))
314
195
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
315
196
self.name, self.type)
316
197
self.group.AddService(
322
203
dbus.UInt16(self.port),
323
204
avahi.string_array_to_txt_array(self.TXT))
324
205
self.group.Commit()
325
326
206
def entry_group_state_changed(self, state, error):
327
207
"""Derived from the Avahi example code"""
328
208
logger.debug("Avahi entry group state change: %i", state)
335
215
elif state == avahi.ENTRY_GROUP_FAILURE:
336
216
logger.critical("Avahi: Error in group state changed %s",
337
217
unicode(error))
338
raise AvahiGroupError("State changed: {0!s}"
339
.format(error))
340
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
341
220
def cleanup(self):
342
221
"""Derived from the Avahi example code"""
343
222
if self.group is not None:
344
223
try:
345
224
self.group.Free()
346
225
except (dbus.exceptions.UnknownMethodException,
347
dbus.exceptions.DBusException):
226
dbus.exceptions.DBusException) as e:
348
227
pass
349
228
self.group = None
350
229
self.remove()
351
352
230
def server_state_changed(self, state, error=None):
353
231
"""Derived from the Avahi example code"""
354
232
logger.debug("Avahi server state change: %i", state)
373
251
logger.debug("Unknown state: %r", state)
374
252
else:
375
253
logger.debug("Unknown state: %r: %r", state, error)
376
377
254
def activate(self):
378
255
"""Derived from the Avahi example code"""
379
256
if self.server is None:
387
264
self.server_state_changed(self.server.GetState())
388
265
389
266
390
class AvahiServiceToSyslog(AvahiService):
391
def rename(self):
392
"""Add the new name to the syslog messages"""
393
ret = AvahiService.rename(self)
394
syslogger.setFormatter(logging.Formatter
395
('Mandos ({0}) [%(process)d]:'
396
' %(levelname)s: %(message)s'
397
.format(self.name)))
398
return ret
399
400
401
def timedelta_to_milliseconds(td):
402
"Convert a datetime.timedelta() to milliseconds"
403
return ((td.days * 24 * 60 * 60 * 1000)
404
+ (td.seconds * 1000)
405
+ (td.microseconds // 1000))
406
407
408
267
class Client(object):
409
268
"""A representation of a client host served by this server.
410
269
411
270
Attributes:
412
approved: bool(); 'None' if not yet approved/disapproved
271
_approved: bool(); 'None' if not yet approved/disapproved
413
272
approval_delay: datetime.timedelta(); Time to wait for approval
414
273
approval_duration: datetime.timedelta(); Duration of one approval
415
274
checker: subprocess.Popen(); a running checker process used
422
281
instance %(name)s can be used in the command.
423
282
checker_initiator_tag: a gobject event source tag, or None
424
283
created: datetime.datetime(); (UTC) object creation
425
client_structure: Object describing what attributes a client has
426
and is used for storing the client at exit
427
284
current_checker_command: string; current running checker_command
285
disable_hook: If set, called by disable() as disable_hook(self)
428
286
disable_initiator_tag: a gobject event source tag, or None
429
287
enabled: bool()
430
288
fingerprint: string (40 or 32 hexadecimal digits); used to
433
291
interval: datetime.timedelta(); How often to start a new checker
434
292
last_approval_request: datetime.datetime(); (UTC) or None
435
293
last_checked_ok: datetime.datetime(); (UTC) or None
436
last_checker_status: integer between 0 and 255 reflecting exit
437
status of last checker. -1 reflects crashed
438
checker, -2 means no checker completed yet.
439
last_enabled: datetime.datetime(); (UTC) or None
294
last_enabled: datetime.datetime(); (UTC)
440
295
name: string; from the config file, used in log messages and
441
296
D-Bus identifiers
442
297
secret: bytestring; sent verbatim (over TLS) to client
443
298
timeout: datetime.timedelta(); How long from last_checked_ok
444
299
until this client is disabled
445
extended_timeout: extra long timeout when secret has been sent
446
300
runtime_expansions: Allowed attributes for runtime expansion.
447
expires: datetime.datetime(); time (UTC) when a client will be
448
disabled, or None
449
server_settings: The server_settings dict from main()
450
301
"""
451
302
452
303
runtime_expansions = ("approval_delay", "approval_duration",
453
"created", "enabled", "expires",
454
"fingerprint", "host", "interval",
455
"last_approval_request", "last_checked_ok",
304
"created", "enabled", "fingerprint",
305
"host", "interval", "last_checked_ok",
456
306
"last_enabled", "name", "timeout")
457
client_defaults = { "timeout": "PT5M",
458
"extended_timeout": "PT15M",
459
"interval": "PT2M",
460
"checker": "fping -q -- %%(host)s",
461
"host": "",
462
"approval_delay": "PT0S",
463
"approval_duration": "PT1S",
464
"approved_by_default": "True",
465
"enabled": "True",
466
}
307
308
@staticmethod
309
def _timedelta_to_milliseconds(td):
310
"Convert a datetime.timedelta() to milliseconds"
311
return ((td.days * 24 * 60 * 60 * 1000)
312
+ (td.seconds * 1000)
313
+ (td.microseconds // 1000))
467
314
468
315
def timeout_milliseconds(self):
469
316
"Return the 'timeout' attribute in milliseconds"
470
return timedelta_to_milliseconds(self.timeout)
471
472
def extended_timeout_milliseconds(self):
473
"Return the 'extended_timeout' attribute in milliseconds"
474
return timedelta_to_milliseconds(self.extended_timeout)
317
return self._timedelta_to_milliseconds(self.timeout)
475
318
476
319
def interval_milliseconds(self):
477
320
"Return the 'interval' attribute in milliseconds"
478
return timedelta_to_milliseconds(self.interval)
479
321
return self._timedelta_to_milliseconds(self.interval)
322
480
323
def approval_delay_milliseconds(self):
481
return timedelta_to_milliseconds(self.approval_delay)
482
483
@staticmethod
484
def config_parser(config):
485
"""Construct a new dict of client settings of this form:
486
{ client_name: {setting_name: value, ...}, ...}
487
with exceptions for any special settings as defined above.
488
NOTE: Must be a pure function. Must return the same result
489
value given the same arguments.
490
"""
491
settings = {}
492
for client_name in config.sections():
493
section = dict(config.items(client_name))
494
client = settings[client_name] = {}
495
496
client["host"] = section["host"]
497
# Reformat values from string types to Python types
498
client["approved_by_default"] = config.getboolean(
499
client_name, "approved_by_default")
500
client["enabled"] = config.getboolean(client_name,
501
"enabled")
502
503
client["fingerprint"] = (section["fingerprint"].upper()
504
.replace(" ", ""))
505
if "secret" in section:
506
client["secret"] = section["secret"].decode("base64")
507
elif "secfile" in section:
508
with open(os.path.expanduser(os.path.expandvars
509
(section["secfile"])),
510
"rb") as secfile:
511
client["secret"] = secfile.read()
512
else:
513
raise TypeError("No secret or secfile for section {0}"
514
.format(section))
515
client["timeout"] = string_to_delta(section["timeout"])
516
client["extended_timeout"] = string_to_delta(
517
section["extended_timeout"])
518
client["interval"] = string_to_delta(section["interval"])
519
client["approval_delay"] = string_to_delta(
520
section["approval_delay"])
521
client["approval_duration"] = string_to_delta(
522
section["approval_duration"])
523
client["checker_command"] = section["checker"]
524
client["last_approval_request"] = None
525
client["last_checked_ok"] = None
526
client["last_checker_status"] = -2
527
528
return settings
529
530
def __init__(self, settings, name = None, server_settings=None):
324
return self._timedelta_to_milliseconds(self.approval_delay)
325
326
def __init__(self, name = None, disable_hook=None, config=None):
327
"""Note: the 'checker' key in 'config' sets the
328
'checker_command' attribute and *not* the 'checker'
329
attribute."""
531
330
self.name = name
532
if server_settings is None:
533
server_settings = {}
534
self.server_settings = server_settings
535
# adding all client settings
536
for setting, value in settings.iteritems():
537
setattr(self, setting, value)
538
539
if self.enabled:
540
if not hasattr(self, "last_enabled"):
541
self.last_enabled = datetime.datetime.utcnow()
542
if not hasattr(self, "expires"):
543
self.expires = (datetime.datetime.utcnow()
544
+ self.timeout)
545
else:
546
self.last_enabled = None
547
self.expires = None
548
331
if config is None:
332
config = {}
549
333
logger.debug("Creating client %r", self.name)
550
334
# Uppercase and remove spaces from fingerprint for later
551
335
# comparison purposes with return value from the fingerprint()
552
336
# function
337
self.fingerprint = (config["fingerprint"].upper()
338
.replace(" ", ""))
553
339
logger.debug(" Fingerprint: %s", self.fingerprint)
554
self.created = settings.get("created",
555
datetime.datetime.utcnow())
556
557
# attributes specific for this server instance
340
if "secret" in config:
341
self.secret = config["secret"].decode("base64")
342
elif "secfile" in config:
343
with open(os.path.expanduser(os.path.expandvars
344
(config["secfile"])),
345
"rb") as secfile:
346
self.secret = secfile.read()
347
else:
348
raise TypeError("No secret or secfile for client %s"
349
% self.name)
350
self.host = config.get("host", "")
351
self.created = datetime.datetime.utcnow()
352
self.enabled = False
353
self.last_approval_request = None
354
self.last_enabled = None
355
self.last_checked_ok = None
356
self.timeout = string_to_delta(config["timeout"])
357
self.interval = string_to_delta(config["interval"])
358
self.disable_hook = disable_hook
558
359
self.checker = None
559
360
self.checker_initiator_tag = None
560
361
self.disable_initiator_tag = None
561
362
self.checker_callback_tag = None
363
self.checker_command = config["checker"]
562
364
self.current_checker_command = None
563
self.approved = None
365
self.last_connect = None
366
self._approved = None
367
self.approved_by_default = config.get("approved_by_default",
368
True)
564
369
self.approvals_pending = 0
565
self.changedstate = (multiprocessing_manager
566
.Condition(multiprocessing_manager
567
.Lock()))
568
self.client_structure = [attr for attr in
569
self.__dict__.iterkeys()
570
if not attr.startswith("_")]
571
self.client_structure.append("client_structure")
572
573
for name, t in inspect.getmembers(type(self),
574
lambda obj:
575
isinstance(obj,
576
property)):
577
if not name.startswith("_"):
578
self.client_structure.append(name)
370
self.approval_delay = string_to_delta(
371
config["approval_delay"])
372
self.approval_duration = string_to_delta(
373
config["approval_duration"])
374
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
579
375
580
# Send notice to process children that client state has changed
581
376
def send_changedstate(self):
582
with self.changedstate:
583
self.changedstate.notify_all()
584
377
self.changedstate.acquire()
378
self.changedstate.notify_all()
379
self.changedstate.release()
380
585
381
def enable(self):
586
382
"""Start this client's checker and timeout hooks"""
587
383
if getattr(self, "enabled", False):
588
384
# Already enabled
589
385
return
590
self.expires = datetime.datetime.utcnow() + self.timeout
591
self.enabled = True
386
self.send_changedstate()
592
387
self.last_enabled = datetime.datetime.utcnow()
593
self.init_checker()
594
self.send_changedstate()
595
596
def disable(self, quiet=True):
597
"""Disable this client."""
598
if not getattr(self, "enabled", False):
599
return False
600
if not quiet:
601
logger.info("Disabling client %s", self.name)
602
if getattr(self, "disable_initiator_tag", None) is not None:
603
gobject.source_remove(self.disable_initiator_tag)
604
self.disable_initiator_tag = None
605
self.expires = None
606
if getattr(self, "checker_initiator_tag", None) is not None:
607
gobject.source_remove(self.checker_initiator_tag)
608
self.checker_initiator_tag = None
609
self.stop_checker()
610
self.enabled = False
611
if not quiet:
612
self.send_changedstate()
613
# Do not run this again if called by a gobject.timeout_add
614
return False
615
616
def __del__(self):
617
self.disable()
618
619
def init_checker(self):
620
388
# Schedule a new checker to be started an 'interval' from now,
621
389
# and every interval from then on.
622
if self.checker_initiator_tag is not None:
623
gobject.source_remove(self.checker_initiator_tag)
624
390
self.checker_initiator_tag = (gobject.timeout_add
625
391
(self.interval_milliseconds(),
626
392
self.start_checker))
627
393
# Schedule a disable() when 'timeout' has passed
628
if self.disable_initiator_tag is not None:
629
gobject.source_remove(self.disable_initiator_tag)
630
394
self.disable_initiator_tag = (gobject.timeout_add
631
395
(self.timeout_milliseconds(),
632
396
self.disable))
397
self.enabled = True
633
398
# Also start a new checker *right now*.
634
399
self.start_checker()
635
400
401
def disable(self, quiet=True):
402
"""Disable this client."""
403
if not getattr(self, "enabled", False):
404
return False
405
if not quiet:
406
self.send_changedstate()
407
if not quiet:
408
logger.info("Disabling client %s", self.name)
409
if getattr(self, "disable_initiator_tag", False):
410
gobject.source_remove(self.disable_initiator_tag)
411
self.disable_initiator_tag = None
412
if getattr(self, "checker_initiator_tag", False):
413
gobject.source_remove(self.checker_initiator_tag)
414
self.checker_initiator_tag = None
415
self.stop_checker()
416
if self.disable_hook:
417
self.disable_hook(self)
418
self.enabled = False
419
# Do not run this again if called by a gobject.timeout_add
420
return False
421
422
def __del__(self):
423
self.disable_hook = None
424
self.disable()
425
636
426
def checker_callback(self, pid, condition, command):
637
427
"""The checker has completed, so take appropriate actions."""
638
428
self.checker_callback_tag = None
639
429
self.checker = None
640
430
if os.WIFEXITED(condition):
641
self.last_checker_status = os.WEXITSTATUS(condition)
642
if self.last_checker_status == 0:
431
exitstatus = os.WEXITSTATUS(condition)
432
if exitstatus == 0:
643
433
logger.info("Checker for %(name)s succeeded",
644
434
vars(self))
645
435
self.checked_ok()
647
437
logger.info("Checker for %(name)s failed",
648
438
vars(self))
649
439
else:
650
self.last_checker_status = -1
651
440
logger.warning("Checker for %(name)s crashed?",
652
441
vars(self))
653
442
654
443
def checked_ok(self):
655
"""Assert that the client has been seen, alive and well."""
444
"""Bump up the timeout for this client.
445
446
This should only be called when the client has been seen,
447
alive and well.
448
"""
656
449
self.last_checked_ok = datetime.datetime.utcnow()
657
self.last_checker_status = 0
658
self.bump_timeout()
659
660
def bump_timeout(self, timeout=None):
661
"""Bump up the timeout for this client."""
662
if timeout is None:
663
timeout = self.timeout
664
if self.disable_initiator_tag is not None:
665
gobject.source_remove(self.disable_initiator_tag)
666
self.disable_initiator_tag = None
667
if getattr(self, "enabled", False):
668
self.disable_initiator_tag = (gobject.timeout_add
669
(timedelta_to_milliseconds
670
(timeout), self.disable))
671
self.expires = datetime.datetime.utcnow() + timeout
450
gobject.source_remove(self.disable_initiator_tag)
451
self.disable_initiator_tag = (gobject.timeout_add
452
(self.timeout_milliseconds(),
453
self.disable))
672
454
673
455
def need_approval(self):
674
456
self.last_approval_request = datetime.datetime.utcnow()
679
461
If a checker already exists, leave it running and do
680
462
nothing."""
681
463
# The reason for not killing a running checker is that if we
682
# did that, and if a checker (for some reason) started running
683
# slowly and taking more than 'interval' time, then the client
684
# would inevitably timeout, since no checker would get a
685
# chance to run to completion. If we instead leave running
464
# did that, then if a checker (for some reason) started
465
# running slowly and taking more than 'interval' time, the
466
# client would inevitably timeout, since no checker would get
467
# a chance to run to completion. If we instead leave running
686
468
# checkers alone, the checker would have to take more time
687
469
# than 'timeout' for the client to be disabled, which is as it
688
470
# should be.
690
472
# If a checker exists, make sure it is not a zombie
691
473
try:
692
474
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
693
except AttributeError:
694
pass
695
except OSError as error:
696
if error.errno != errno.ECHILD:
697
raise
475
except (AttributeError, OSError) as error:
476
if (isinstance(error, OSError)
477
and error.errno != errno.ECHILD):
478
raise error
698
479
else:
699
480
if pid:
700
481
logger.warning("Checker was a zombie")
703
484
self.current_checker_command)
704
485
# Start a new checker if needed
705
486
if self.checker is None:
706
# Escape attributes for the shell
707
escaped_attrs = dict(
708
(attr, re.escape(unicode(getattr(self, attr))))
709
for attr in
710
self.runtime_expansions)
711
487
try:
712
command = self.checker_command % escaped_attrs
713
except TypeError as error:
714
logger.error('Could not format string "%s"',
715
self.checker_command, exc_info=error)
716
return True # Try again later
488
# In case checker_command has exactly one % operator
489
command = self.checker_command % self.host
490
except TypeError:
491
# Escape attributes for the shell
492
escaped_attrs = dict(
493
(attr,
494
re.escape(unicode(str(getattr(self, attr, "")),
495
errors=
496
'replace')))
497
for attr in
498
self.runtime_expansions)
499
500
try:
501
command = self.checker_command % escaped_attrs
502
except TypeError as error:
503
logger.error('Could not format string "%s":'
504
' %s', self.checker_command, error)
505
return True # Try again later
717
506
self.current_checker_command = command
718
507
try:
719
508
logger.info("Starting checker %r for %s",
722
511
# in normal mode, that is already done by daemon(),
723
512
# and in debug mode we don't want to. (Stdin is
724
513
# always replaced by /dev/null.)
725
# The exception is when not debugging but nevertheless
726
# running in the foreground; use the previously
727
# created wnull.
728
popen_args = {}
729
if (not self.server_settings["debug"]
730
and self.server_settings["foreground"]):
731
popen_args.update({"stdout": wnull,
732
"stderr": wnull })
733
514
self.checker = subprocess.Popen(command,
734
515
close_fds=True,
735
shell=True, cwd="/",
736
**popen_args)
737
except OSError as error:
738
logger.error("Failed to start subprocess",
739
exc_info=error)
740
return True
741
self.checker_callback_tag = (gobject.child_watch_add
742
(self.checker.pid,
743
self.checker_callback,
744
data=command))
745
# The checker may have completed before the gobject
746
# watch was added. Check for this.
747
try:
516
shell=True, cwd="/")
517
self.checker_callback_tag = (gobject.child_watch_add
518
(self.checker.pid,
519
self.checker_callback,
520
data=command))
521
# The checker may have completed before the gobject
522
# watch was added. Check for this.
748
523
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
524
if pid:
525
gobject.source_remove(self.checker_callback_tag)
526
self.checker_callback(pid, status, command)
749
527
except OSError as error:
750
if error.errno == errno.ECHILD:
751
# This should never happen
752
logger.error("Child process vanished",
753
exc_info=error)
754
return True
755
raise
756
if pid:
757
gobject.source_remove(self.checker_callback_tag)
758
self.checker_callback(pid, status, command)
528
logger.error("Failed to start subprocess: %s",
529
error)
759
530
# Re-run this periodically if run by gobject.timeout_add
760
531
return True
761
532
768
539
return
769
540
logger.debug("Stopping checker for %(name)s", vars(self))
770
541
try:
771
self.checker.terminate()
542
os.kill(self.checker.pid, signal.SIGTERM)
772
543
#time.sleep(0.5)
773
544
#if self.checker.poll() is None:
774
# self.checker.kill()
545
# os.kill(self.checker.pid, signal.SIGKILL)
775
546
except OSError as error:
776
547
if error.errno != errno.ESRCH: # No such process
777
548
raise
778
549
self.checker = None
779
550
780
781
551
def dbus_service_property(dbus_interface, signature="v",
782
552
access="readwrite", byte_arrays=False):
783
553
"""Decorators for marking methods of a DBusObjectWithProperties to
794
564
# "Set" method, so we fail early here:
795
565
if byte_arrays and signature != "ay":
796
566
raise ValueError("Byte arrays not supported for non-'ay'"
797
" signature {0!r}".format(signature))
567
" signature %r" % signature)
798
568
def decorator(func):
799
569
func._dbus_is_property = True
800
570
func._dbus_interface = dbus_interface
808
578
return decorator
809
579
810
580
811
def dbus_interface_annotations(dbus_interface):
812
"""Decorator for marking functions returning interface annotations
813
814
Usage:
815
816
@dbus_interface_annotations("org.example.Interface")
817
def _foo(self): # Function name does not matter
818
return {"org.freedesktop.DBus.Deprecated": "true",
819
"org.freedesktop.DBus.Property.EmitsChangedSignal":
820
"false"}
821
"""
822
def decorator(func):
823
func._dbus_is_interface = True
824
func._dbus_interface = dbus_interface
825
func._dbus_name = dbus_interface
826
return func
827
return decorator
828
829
830
def dbus_annotations(annotations):
831
"""Decorator to annotate D-Bus methods, signals or properties
832
Usage:
833
834
@dbus_service_property("org.example.Interface", signature="b",
835
access="r")
836
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
837
"org.freedesktop.DBus.Property."
838
"EmitsChangedSignal": "false"})
839
def Property_dbus_property(self):
840
return dbus.Boolean(False)
841
"""
842
def decorator(func):
843
func._dbus_annotations = annotations
844
return func
845
return decorator
846
847
848
581
class DBusPropertyException(dbus.exceptions.DBusException):
849
582
"""A base class for D-Bus property-related exceptions
850
583
"""
866
599
867
600
class DBusObjectWithProperties(dbus.service.Object):
868
601
"""A D-Bus object with properties.
869
602
870
603
Classes inheriting from this can use the dbus_service_property
871
604
decorator to expose methods as D-Bus properties. It exposes the
872
605
standard Get(), Set(), and GetAll() methods on the D-Bus.
873
606
"""
874
607
875
608
@staticmethod
876
def _is_dbus_thing(thing):
877
"""Returns a function testing if an attribute is a D-Bus thing
878
879
If called like _is_dbus_thing("method") it returns a function
880
suitable for use as predicate to inspect.getmembers().
881
"""
882
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
883
False)
609
def _is_dbus_property(obj):
610
return getattr(obj, "_dbus_is_property", False)
884
611
885
def _get_all_dbus_things(self, thing):
612
def _get_all_dbus_properties(self):
886
613
"""Returns a generator of (name, attribute) pairs
887
614
"""
888
return ((getattr(athing.__get__(self), "_dbus_name",
889
name),
890
athing.__get__(self))
891
for cls in self.__class__.__mro__
892
for name, athing in
893
inspect.getmembers(cls,
894
self._is_dbus_thing(thing)))
615
return ((prop._dbus_name, prop)
616
for name, prop in
617
inspect.getmembers(self, self._is_dbus_property))
895
618
896
619
def _get_dbus_property(self, interface_name, property_name):
897
620
"""Returns a bound method if one exists which is a D-Bus
898
621
property with the specified name and interface.
899
622
"""
900
for cls in self.__class__.__mro__:
901
for name, value in (inspect.getmembers
902
(cls,
903
self._is_dbus_thing("property"))):
904
if (value._dbus_name == property_name
905
and value._dbus_interface == interface_name):
906
return value.__get__(self)
907
623
for name in (property_name,
624
property_name + "_dbus_property"):
625
prop = getattr(self, name, None)
626
if (prop is None
627
or not self._is_dbus_property(prop)
628
or prop._dbus_name != property_name
629
or (interface_name and prop._dbus_interface
630
and interface_name != prop._dbus_interface)):
631
continue
632
return prop
908
633
# No such property
909
634
raise DBusPropertyNotFound(self.dbus_object_path + ":"
910
635
+ interface_name + "."
934
659
# The byte_arrays option is not supported yet on
935
660
# signatures other than "ay".
936
661
if prop._dbus_signature != "ay":
937
raise ValueError("Byte arrays not supported for non-"
938
"'ay' signature {0!r}"
939
.format(prop._dbus_signature))
940
value = dbus.ByteArray(b''.join(chr(byte)
941
for byte in value))
662
raise ValueError
663
value = dbus.ByteArray(''.join(unichr(byte)
664
for byte in value))
942
665
prop(value)
943
666
944
667
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
946
669
def GetAll(self, interface_name):
947
670
"""Standard D-Bus property GetAll() method, see D-Bus
948
671
standard.
949
672
950
673
Note: Will not include properties with access="write".
951
674
"""
952
properties = {}
953
for name, prop in self._get_all_dbus_things("property"):
675
all = {}
676
for name, prop in self._get_all_dbus_properties():
954
677
if (interface_name
955
678
and interface_name != prop._dbus_interface):
956
679
# Interface non-empty but did not match
960
683
continue
961
684
value = prop()
962
685
if not hasattr(value, "variant_level"):
963
properties[name] = value
686
all[name] = value
964
687
continue
965
properties[name] = type(value)(value, variant_level=
966
value.variant_level+1)
967
return dbus.Dictionary(properties, signature="sv")
688
all[name] = type(value)(value, variant_level=
689
value.variant_level+1)
690
return dbus.Dictionary(all, signature="sv")
968
691
969
692
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
970
693
out_signature="s",
971
694
path_keyword='object_path',
972
695
connection_keyword='connection')
973
696
def Introspect(self, object_path, connection):
974
"""Overloading of standard D-Bus method.
975
976
Inserts property tags and interface annotation tags.
697
"""Standard D-Bus method, overloaded to insert property tags.
977
698
"""
978
699
xmlstring = dbus.service.Object.Introspect(self, object_path,
979
700
connection)
986
707
e.setAttribute("access", prop._dbus_access)
987
708
return e
988
709
for if_tag in document.getElementsByTagName("interface"):
989
# Add property tags
990
710
for tag in (make_tag(document, name, prop)
991
711
for name, prop
992
in self._get_all_dbus_things("property")
712
in self._get_all_dbus_properties()
993
713
if prop._dbus_interface
994
714
== if_tag.getAttribute("name")):
995
715
if_tag.appendChild(tag)
996
# Add annotation tags
997
for typ in ("method", "signal", "property"):
998
for tag in if_tag.getElementsByTagName(typ):
999
annots = dict()
1000
for name, prop in (self.
1001
_get_all_dbus_things(typ)):
1002
if (name == tag.getAttribute("name")
1003
and prop._dbus_interface
1004
== if_tag.getAttribute("name")):
1005
annots.update(getattr
1006
(prop,
1007
"_dbus_annotations",
1008
{}))
1009
for name, value in annots.iteritems():
1010
ann_tag = document.createElement(
1011
"annotation")
1012
ann_tag.setAttribute("name", name)
1013
ann_tag.setAttribute("value", value)
1014
tag.appendChild(ann_tag)
1015
# Add interface annotation tags
1016
for annotation, value in dict(
1017
itertools.chain.from_iterable(
1018
annotations().iteritems()
1019
for name, annotations in
1020
self._get_all_dbus_things("interface")
1021
if name == if_tag.getAttribute("name")
1022
)).iteritems():
1023
ann_tag = document.createElement("annotation")
1024
ann_tag.setAttribute("name", annotation)
1025
ann_tag.setAttribute("value", value)
1026
if_tag.appendChild(ann_tag)
1027
716
# Add the names to the return values for the
1028
717
# "org.freedesktop.DBus.Properties" methods
1029
718
if (if_tag.getAttribute("name")
1044
733
except (AttributeError, xml.dom.DOMException,
1045
734
xml.parsers.expat.ExpatError) as error:
1046
735
logger.error("Failed to override Introspection method",
1047
exc_info=error)
736
error)
1048
737
return xmlstring
1049
738
1050
739
1051
def datetime_to_dbus(dt, variant_level=0):
1052
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1053
if dt is None:
1054
return dbus.String("", variant_level = variant_level)
1055
return dbus.String(dt.isoformat(),
1056
variant_level=variant_level)
1057
1058
1059
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1060
"""A class decorator; applied to a subclass of
1061
dbus.service.Object, it will add alternate D-Bus attributes with
1062
interface names according to the "alt_interface_names" mapping.
1063
Usage:
1064
1065
@alternate_dbus_interfaces({"org.example.Interface":
1066
"net.example.AlternateInterface"})
1067
class SampleDBusObject(dbus.service.Object):
1068
@dbus.service.method("org.example.Interface")
1069
def SampleDBusMethod():
1070
pass
1071
1072
The above "SampleDBusMethod" on "SampleDBusObject" will be
1073
reachable via two interfaces: "org.example.Interface" and
1074
"net.example.AlternateInterface", the latter of which will have
1075
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1076
"true", unless "deprecate" is passed with a False value.
1077
1078
This works for methods and signals, and also for D-Bus properties
1079
(from DBusObjectWithProperties) and interfaces (from the
1080
dbus_interface_annotations decorator).
1081
"""
1082
def wrapper(cls):
1083
for orig_interface_name, alt_interface_name in (
1084
alt_interface_names.iteritems()):
1085
attr = {}
1086
interface_names = set()
1087
# Go though all attributes of the class
1088
for attrname, attribute in inspect.getmembers(cls):
1089
# Ignore non-D-Bus attributes, and D-Bus attributes
1090
# with the wrong interface name
1091
if (not hasattr(attribute, "_dbus_interface")
1092
or not attribute._dbus_interface
1093
.startswith(orig_interface_name)):
1094
continue
1095
# Create an alternate D-Bus interface name based on
1096
# the current name
1097
alt_interface = (attribute._dbus_interface
1098
.replace(orig_interface_name,
1099
alt_interface_name))
1100
interface_names.add(alt_interface)
1101
# Is this a D-Bus signal?
1102
if getattr(attribute, "_dbus_is_signal", False):
1103
# Extract the original non-method undecorated
1104
# function by black magic
1105
nonmethod_func = (dict(
1106
zip(attribute.func_code.co_freevars,
1107
attribute.__closure__))["func"]
1108
.cell_contents)
1109
# Create a new, but exactly alike, function
1110
# object, and decorate it to be a new D-Bus signal
1111
# with the alternate D-Bus interface name
1112
new_function = (dbus.service.signal
1113
(alt_interface,
1114
attribute._dbus_signature)
1115
(types.FunctionType(
1116
nonmethod_func.func_code,
1117
nonmethod_func.func_globals,
1118
nonmethod_func.func_name,
1119
nonmethod_func.func_defaults,
1120
nonmethod_func.func_closure)))
1121
# Copy annotations, if any
1122
try:
1123
new_function._dbus_annotations = (
1124
dict(attribute._dbus_annotations))
1125
except AttributeError:
1126
pass
1127
# Define a creator of a function to call both the
1128
# original and alternate functions, so both the
1129
# original and alternate signals gets sent when
1130
# the function is called
1131
def fixscope(func1, func2):
1132
"""This function is a scope container to pass
1133
func1 and func2 to the "call_both" function
1134
outside of its arguments"""
1135
def call_both(*args, **kwargs):
1136
"""This function will emit two D-Bus
1137
signals by calling func1 and func2"""
1138
func1(*args, **kwargs)
1139
func2(*args, **kwargs)
1140
return call_both
1141
# Create the "call_both" function and add it to
1142
# the class
1143
attr[attrname] = fixscope(attribute, new_function)
1144
# Is this a D-Bus method?
1145
elif getattr(attribute, "_dbus_is_method", False):
1146
# Create a new, but exactly alike, function
1147
# object. Decorate it to be a new D-Bus method
1148
# with the alternate D-Bus interface name. Add it
1149
# to the class.
1150
attr[attrname] = (dbus.service.method
1151
(alt_interface,
1152
attribute._dbus_in_signature,
1153
attribute._dbus_out_signature)
1154
(types.FunctionType
1155
(attribute.func_code,
1156
attribute.func_globals,
1157
attribute.func_name,
1158
attribute.func_defaults,
1159
attribute.func_closure)))
1160
# Copy annotations, if any
1161
try:
1162
attr[attrname]._dbus_annotations = (
1163
dict(attribute._dbus_annotations))
1164
except AttributeError:
1165
pass
1166
# Is this a D-Bus property?
1167
elif getattr(attribute, "_dbus_is_property", False):
1168
# Create a new, but exactly alike, function
1169
# object, and decorate it to be a new D-Bus
1170
# property with the alternate D-Bus interface
1171
# name. Add it to the class.
1172
attr[attrname] = (dbus_service_property
1173
(alt_interface,
1174
attribute._dbus_signature,
1175
attribute._dbus_access,
1176
attribute
1177
._dbus_get_args_options
1178
["byte_arrays"])
1179
(types.FunctionType
1180
(attribute.func_code,
1181
attribute.func_globals,
1182
attribute.func_name,
1183
attribute.func_defaults,
1184
attribute.func_closure)))
1185
# Copy annotations, if any
1186
try:
1187
attr[attrname]._dbus_annotations = (
1188
dict(attribute._dbus_annotations))
1189
except AttributeError:
1190
pass
1191
# Is this a D-Bus interface?
1192
elif getattr(attribute, "_dbus_is_interface", False):
1193
# Create a new, but exactly alike, function
1194
# object. Decorate it to be a new D-Bus interface
1195
# with the alternate D-Bus interface name. Add it
1196
# to the class.
1197
attr[attrname] = (dbus_interface_annotations
1198
(alt_interface)
1199
(types.FunctionType
1200
(attribute.func_code,
1201
attribute.func_globals,
1202
attribute.func_name,
1203
attribute.func_defaults,
1204
attribute.func_closure)))
1205
if deprecate:
1206
# Deprecate all alternate interfaces
1207
iname="_AlternateDBusNames_interface_annotation{0}"
1208
for interface_name in interface_names:
1209
@dbus_interface_annotations(interface_name)
1210
def func(self):
1211
return { "org.freedesktop.DBus.Deprecated":
1212
"true" }
1213
# Find an unused name
1214
for aname in (iname.format(i)
1215
for i in itertools.count()):
1216
if aname not in attr:
1217
attr[aname] = func
1218
break
1219
if interface_names:
1220
# Replace the class with a new subclass of it with
1221
# methods, signals, etc. as created above.
1222
cls = type(b"{0}Alternate".format(cls.__name__),
1223
(cls,), attr)
1224
return cls
1225
return wrapper
1226
1227
1228
@alternate_dbus_interfaces({"se.recompile.Mandos":
1229
"se.bsnet.fukt.Mandos"})
1230
740
class ClientDBus(Client, DBusObjectWithProperties):
1231
741
"""A Client class using D-Bus
1232
742
1241
751
# dbus.service.Object doesn't use super(), so we can't either.
1242
752
1243
753
def __init__(self, bus = None, *args, **kwargs):
754
self._approvals_pending = 0
1244
755
self.bus = bus
1245
756
Client.__init__(self, *args, **kwargs)
1246
757
# Only now, when this client is initialized, can it show up on
1252
763
("/clients/" + client_object_name))
1253
764
DBusObjectWithProperties.__init__(self, self.bus,
1254
765
self.dbus_object_path)
1255
1256
def notifychangeproperty(transform_func,
1257
dbus_name, type_func=lambda x: x,
1258
variant_level=1):
1259
""" Modify a variable so that it's a property which announces
1260
its changes to DBus.
1261
1262
transform_fun: Function that takes a value and a variant_level
1263
and transforms it to a D-Bus type.
1264
dbus_name: D-Bus name of the variable
1265
type_func: Function that transform the value before sending it
1266
to the D-Bus. Default: no transform
1267
variant_level: D-Bus variant level. Default: 1
1268
"""
1269
attrname = "_{0}".format(dbus_name)
1270
def setter(self, value):
1271
if hasattr(self, "dbus_object_path"):
1272
if (not hasattr(self, attrname) or
1273
type_func(getattr(self, attrname, None))
1274
!= type_func(value)):
1275
dbus_value = transform_func(type_func(value),
1276
variant_level
1277
=variant_level)
1278
self.PropertyChanged(dbus.String(dbus_name),
1279
dbus_value)
1280
setattr(self, attrname, value)
1281
1282
return property(lambda self: getattr(self, attrname), setter)
1283
1284
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1285
approvals_pending = notifychangeproperty(dbus.Boolean,
1286
"ApprovalPending",
1287
type_func = bool)
1288
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1289
last_enabled = notifychangeproperty(datetime_to_dbus,
1290
"LastEnabled")
1291
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1292
type_func = lambda checker:
1293
checker is not None)
1294
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1295
"LastCheckedOK")
1296
last_checker_status = notifychangeproperty(dbus.Int16,
1297
"LastCheckerStatus")
1298
last_approval_request = notifychangeproperty(
1299
datetime_to_dbus, "LastApprovalRequest")
1300
approved_by_default = notifychangeproperty(dbus.Boolean,
1301
"ApprovedByDefault")
1302
approval_delay = notifychangeproperty(dbus.UInt64,
1303
"ApprovalDelay",
1304
type_func =
1305
timedelta_to_milliseconds)
1306
approval_duration = notifychangeproperty(
1307
dbus.UInt64, "ApprovalDuration",
1308
type_func = timedelta_to_milliseconds)
1309
host = notifychangeproperty(dbus.String, "Host")
1310
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1311
type_func =
1312
timedelta_to_milliseconds)
1313
extended_timeout = notifychangeproperty(
1314
dbus.UInt64, "ExtendedTimeout",
1315
type_func = timedelta_to_milliseconds)
1316
interval = notifychangeproperty(dbus.UInt64,
1317
"Interval",
1318
type_func =
1319
timedelta_to_milliseconds)
1320
checker_command = notifychangeproperty(dbus.String, "Checker")
1321
1322
del notifychangeproperty
766
767
def _get_approvals_pending(self):
768
return self._approvals_pending
769
def _set_approvals_pending(self, value):
770
old_value = self._approvals_pending
771
self._approvals_pending = value
772
bval = bool(value)
773
if (hasattr(self, "dbus_object_path")
774
and bval is not bool(old_value)):
775
dbus_bool = dbus.Boolean(bval, variant_level=1)
776
self.PropertyChanged(dbus.String("ApprovalPending"),
777
dbus_bool)
778
779
approvals_pending = property(_get_approvals_pending,
780
_set_approvals_pending)
781
del _get_approvals_pending, _set_approvals_pending
782
783
@staticmethod
784
def _datetime_to_dbus(dt, variant_level=0):
785
"""Convert a UTC datetime.datetime() to a D-Bus type."""
786
return dbus.String(dt.isoformat(),
787
variant_level=variant_level)
788
789
def enable(self):
790
oldstate = getattr(self, "enabled", False)
791
r = Client.enable(self)
792
if oldstate != self.enabled:
793
# Emit D-Bus signals
794
self.PropertyChanged(dbus.String("Enabled"),
795
dbus.Boolean(True, variant_level=1))
796
self.PropertyChanged(
797
dbus.String("LastEnabled"),
798
self._datetime_to_dbus(self.last_enabled,
799
variant_level=1))
800
return r
801
802
def disable(self, quiet = False):
803
oldstate = getattr(self, "enabled", False)
804
r = Client.disable(self, quiet=quiet)
805
if not quiet and oldstate != self.enabled:
806
# Emit D-Bus signal
807
self.PropertyChanged(dbus.String("Enabled"),
808
dbus.Boolean(False, variant_level=1))
809
return r
1323
810
1324
811
def __del__(self, *args, **kwargs):
1325
812
try:
1334
821
*args, **kwargs):
1335
822
self.checker_callback_tag = None
1336
823
self.checker = None
824
# Emit D-Bus signal
825
self.PropertyChanged(dbus.String("CheckerRunning"),
826
dbus.Boolean(False, variant_level=1))
1337
827
if os.WIFEXITED(condition):
1338
828
exitstatus = os.WEXITSTATUS(condition)
1339
829
# Emit D-Bus signal
1349
839
return Client.checker_callback(self, pid, condition, command,
1350
840
*args, **kwargs)
1351
841
842
def checked_ok(self, *args, **kwargs):
843
Client.checked_ok(self, *args, **kwargs)
844
# Emit D-Bus signal
845
self.PropertyChanged(
846
dbus.String("LastCheckedOK"),
847
(self._datetime_to_dbus(self.last_checked_ok,
848
variant_level=1)))
849
850
def need_approval(self, *args, **kwargs):
851
r = Client.need_approval(self, *args, **kwargs)
852
# Emit D-Bus signal
853
self.PropertyChanged(
854
dbus.String("LastApprovalRequest"),
855
(self._datetime_to_dbus(self.last_approval_request,
856
variant_level=1)))
857
return r
858
1352
859
def start_checker(self, *args, **kwargs):
1353
860
old_checker = self.checker
1354
861
if self.checker is not None:
1361
868
and old_checker_pid != self.checker.pid):
1362
869
# Emit D-Bus signal
1363
870
self.CheckerStarted(self.current_checker_command)
871
self.PropertyChanged(
872
dbus.String("CheckerRunning"),
873
dbus.Boolean(True, variant_level=1))
1364
874
return r
1365
875
876
def stop_checker(self, *args, **kwargs):
877
old_checker = getattr(self, "checker", None)
878
r = Client.stop_checker(self, *args, **kwargs)
879
if (old_checker is not None
880
and getattr(self, "checker", None) is None):
881
self.PropertyChanged(dbus.String("CheckerRunning"),
882
dbus.Boolean(False, variant_level=1))
883
return r
884
1366
885
def _reset_approved(self):
1367
self.approved = None
886
self._approved = None
1368
887
return False
1369
888
1370
889
def approve(self, value=True):
1371
self.approved = value
1372
gobject.timeout_add(timedelta_to_milliseconds
890
self.send_changedstate()
891
self._approved = value
892
gobject.timeout_add(self._timedelta_to_milliseconds
1373
893
(self.approval_duration),
1374
894
self._reset_approved)
1375
self.send_changedstate()
895
1376
896
1377
897
## D-Bus methods, signals & properties
1378
_interface = "se.recompile.Mandos.Client"
1379
1380
## Interfaces
1381
1382
@dbus_interface_annotations(_interface)
1383
def _foo(self):
1384
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1385
"false"}
898
_interface = "se.bsnet.fukt.Mandos.Client"
1386
899
1387
900
## Signals
1388
901
1474
987
if value is None: # get
1475
988
return dbus.Boolean(self.approved_by_default)
1476
989
self.approved_by_default = bool(value)
990
# Emit D-Bus signal
991
self.PropertyChanged(dbus.String("ApprovedByDefault"),
992
dbus.Boolean(value, variant_level=1))
1477
993
1478
994
# ApprovalDelay - property
1479
995
@dbus_service_property(_interface, signature="t",
1482
998
if value is None: # get
1483
999
return dbus.UInt64(self.approval_delay_milliseconds())
1484
1000
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1001
# Emit D-Bus signal
1002
self.PropertyChanged(dbus.String("ApprovalDelay"),
1003
dbus.UInt64(value, variant_level=1))
1485
1004
1486
1005
# ApprovalDuration - property
1487
1006
@dbus_service_property(_interface, signature="t",
1488
1007
access="readwrite")
1489
1008
def ApprovalDuration_dbus_property(self, value=None):
1490
1009
if value is None: # get
1491
return dbus.UInt64(timedelta_to_milliseconds(
1010
return dbus.UInt64(self._timedelta_to_milliseconds(
1492
1011
self.approval_duration))
1493
1012
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1013
# Emit D-Bus signal
1014
self.PropertyChanged(dbus.String("ApprovalDuration"),
1015
dbus.UInt64(value, variant_level=1))
1494
1016
1495
1017
# Name - property
1496
1018
@dbus_service_property(_interface, signature="s", access="read")
1508
1030
def Host_dbus_property(self, value=None):
1509
1031
if value is None: # get
1510
1032
return dbus.String(self.host)
1511
self.host = unicode(value)
1033
self.host = value
1034
# Emit D-Bus signal
1035
self.PropertyChanged(dbus.String("Host"),
1036
dbus.String(value, variant_level=1))
1512
1037
1513
1038
# Created - property
1514
1039
@dbus_service_property(_interface, signature="s", access="read")
1515
1040
def Created_dbus_property(self):
1516
return datetime_to_dbus(self.created)
1041
return dbus.String(self._datetime_to_dbus(self.created))
1517
1042
1518
1043
# LastEnabled - property
1519
1044
@dbus_service_property(_interface, signature="s", access="read")
1520
1045
def LastEnabled_dbus_property(self):
1521
return datetime_to_dbus(self.last_enabled)
1046
if self.last_enabled is None:
1047
return dbus.String("")
1048
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1522
1049
1523
1050
# Enabled - property
1524
1051
@dbus_service_property(_interface, signature="b",
1538
1065
if value is not None:
1539
1066
self.checked_ok()
1540
1067
return
1541
return datetime_to_dbus(self.last_checked_ok)
1542
1543
# LastCheckerStatus - property
1544
@dbus_service_property(_interface, signature="n",
1545
access="read")
1546
def LastCheckerStatus_dbus_property(self):
1547
return dbus.Int16(self.last_checker_status)
1548
1549
# Expires - property
1550
@dbus_service_property(_interface, signature="s", access="read")
1551
def Expires_dbus_property(self):
1552
return datetime_to_dbus(self.expires)
1068
if self.last_checked_ok is None:
1069
return dbus.String("")
1070
return dbus.String(self._datetime_to_dbus(self
1071
.last_checked_ok))
1553
1072
1554
1073
# LastApprovalRequest - property
1555
1074
@dbus_service_property(_interface, signature="s", access="read")
1556
1075
def LastApprovalRequest_dbus_property(self):
1557
return datetime_to_dbus(self.last_approval_request)
1076
if self.last_approval_request is None:
1077
return dbus.String("")
1078
return dbus.String(self.
1079
_datetime_to_dbus(self
1080
.last_approval_request))
1558
1081
1559
1082
# Timeout - property
1560
1083
@dbus_service_property(_interface, signature="t",
1562
1085
def Timeout_dbus_property(self, value=None):
1563
1086
if value is None: # get
1564
1087
return dbus.UInt64(self.timeout_milliseconds())
1565
old_timeout = self.timeout
1566
1088
self.timeout = datetime.timedelta(0, 0, 0, value)
1567
# Reschedule disabling
1568
if self.enabled:
1569
now = datetime.datetime.utcnow()
1570
self.expires += self.timeout - old_timeout
1571
if self.expires <= now:
1572
# The timeout has passed
1573
self.disable()
1574
else:
1575
if (getattr(self, "disable_initiator_tag", None)
1576
is None):
1577
return
1578
gobject.source_remove(self.disable_initiator_tag)
1579
self.disable_initiator_tag = (
1580
gobject.timeout_add(
1581
timedelta_to_milliseconds(self.expires - now),
1582
self.disable))
1583
1584
# ExtendedTimeout - property
1585
@dbus_service_property(_interface, signature="t",
1586
access="readwrite")
1587
def ExtendedTimeout_dbus_property(self, value=None):
1588
if value is None: # get
1589
return dbus.UInt64(self.extended_timeout_milliseconds())
1590
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1089
# Emit D-Bus signal
1090
self.PropertyChanged(dbus.String("Timeout"),
1091
dbus.UInt64(value, variant_level=1))
1092
if getattr(self, "disable_initiator_tag", None) is None:
1093
return
1094
# Reschedule timeout
1095
gobject.source_remove(self.disable_initiator_tag)
1096
self.disable_initiator_tag = None
1097
time_to_die = (self.
1098
_timedelta_to_milliseconds((self
1099
.last_checked_ok
1100
+ self.timeout)
1101
- datetime.datetime
1102
.utcnow()))
1103
if time_to_die <= 0:
1104
# The timeout has passed
1105
self.disable()
1106
else:
1107
self.disable_initiator_tag = (gobject.timeout_add
1108
(time_to_die, self.disable))
1591
1109
1592
1110
# Interval - property
1593
1111
@dbus_service_property(_interface, signature="t",
1596
1114
if value is None: # get
1597
1115
return dbus.UInt64(self.interval_milliseconds())
1598
1116
self.interval = datetime.timedelta(0, 0, 0, value)
1117
# Emit D-Bus signal
1118
self.PropertyChanged(dbus.String("Interval"),
1119
dbus.UInt64(value, variant_level=1))
1599
1120
if getattr(self, "checker_initiator_tag", None) is None:
1600
1121
return
1601
if self.enabled:
1602
# Reschedule checker run
1603
gobject.source_remove(self.checker_initiator_tag)
1604
self.checker_initiator_tag = (gobject.timeout_add
1605
(value, self.start_checker))
1606
self.start_checker() # Start one now, too
1607
1122
# Reschedule checker run
1123
gobject.source_remove(self.checker_initiator_tag)
1124
self.checker_initiator_tag = (gobject.timeout_add
1125
(value, self.start_checker))
1126
self.start_checker() # Start one now, too
1127
1608
1128
# Checker - property
1609
1129
@dbus_service_property(_interface, signature="s",
1610
1130
access="readwrite")
1611
1131
def Checker_dbus_property(self, value=None):
1612
1132
if value is None: # get
1613
1133
return dbus.String(self.checker_command)
1614
self.checker_command = unicode(value)
1134
self.checker_command = value
1135
# Emit D-Bus signal
1136
self.PropertyChanged(dbus.String("Checker"),
1137
dbus.String(self.checker_command,
1138
variant_level=1))
1615
1139
1616
1140
# CheckerRunning - property
1617
1141
@dbus_service_property(_interface, signature="b",
1644
1168
self._pipe.send(('init', fpr, address))
1645
1169
if not self._pipe.recv():
1646
1170
raise KeyError()
1647
1171
1648
1172
def __getattribute__(self, name):
1649
if name == '_pipe':
1173
if(name == '_pipe'):
1650
1174
return super(ProxyClient, self).__getattribute__(name)
1651
1175
self._pipe.send(('getattr', name))
1652
1176
data = self._pipe.recv()
1657
1181
self._pipe.send(('funcall', name, args, kwargs))
1658
1182
return self._pipe.recv()[1]
1659
1183
return func
1660
1184
1661
1185
def __setattr__(self, name, value):
1662
if name == '_pipe':
1186
if(name == '_pipe'):
1663
1187
return super(ProxyClient, self).__setattr__(name, value)
1664
1188
self._pipe.send(('setattr', name, value))
1665
1189
1676
1200
unicode(self.client_address))
1677
1201
logger.debug("Pipe FD: %d",
1678
1202
self.server.child_pipe.fileno())
1679
1203
1680
1204
session = (gnutls.connection
1681
1205
.ClientSession(self.request,
1682
1206
gnutls.connection
1683
1207
.X509Credentials()))
1684
1208
1685
1209
# Note: gnutls.connection.X509Credentials is really a
1686
1210
# generic GnuTLS certificate credentials object so long as
1687
1211
# no X.509 keys are added to it. Therefore, we can use it
1688
1212
# here despite using OpenPGP certificates.
1689
1213
1690
1214
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1691
1215
# "+AES-256-CBC", "+SHA1",
1692
1216
# "+COMP-NULL", "+CTYPE-OPENPGP",
1698
1222
(gnutls.library.functions
1699
1223
.gnutls_priority_set_direct(session._c_object,
1700
1224
priority, None))
1701
1225
1702
1226
# Start communication using the Mandos protocol
1703
1227
# Get protocol number
1704
1228
line = self.request.makefile().readline()
1705
1229
logger.debug("Protocol version: %r", line)
1706
1230
try:
1707
1231
if int(line.strip().split()[0]) > 1:
1708
raise RuntimeError(line)
1232
raise RuntimeError
1709
1233
except (ValueError, IndexError, RuntimeError) as error:
1710
1234
logger.error("Unknown protocol version: %s", error)
1711
1235
return
1712
1236
1713
1237
# Start GnuTLS connection
1714
1238
try:
1715
1239
session.handshake()
1719
1243
# established. Just abandon the request.
1720
1244
return
1721
1245
logger.debug("Handshake succeeded")
1722
1246
1723
1247
approval_required = False
1724
1248
try:
1725
1249
try:
1730
1254
logger.warning("Bad certificate: %s", error)
1731
1255
return
1732
1256
logger.debug("Fingerprint: %s", fpr)
1733
1257
1734
1258
try:
1735
1259
client = ProxyClient(child_pipe, fpr,
1736
1260
self.client_address)
1748
1272
client.name)
1749
1273
if self.server.use_dbus:
1750
1274
# Emit D-Bus signal
1751
client.Rejected("Disabled")
1275
client.Rejected("Disabled")
1752
1276
return
1753
1277
1754
if client.approved or not client.approval_delay:
1278
if client._approved or not client.approval_delay:
1755
1279
#We are approved or approval is disabled
1756
1280
break
1757
elif client.approved is None:
1281
elif client._approved is None:
1758
1282
logger.info("Client %s needs approval",
1759
1283
client.name)
1760
1284
if self.server.use_dbus:
1771
1295
return
1772
1296
1773
1297
#wait until timeout or approved
1298
#x = float(client._timedelta_to_milliseconds(delay))
1774
1299
time = datetime.datetime.now()
1775
1300
client.changedstate.acquire()
1776
client.changedstate.wait(
1777
float(timedelta_to_milliseconds(delay)
1778
/ 1000))
1301
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1779
1302
client.changedstate.release()
1780
1303
time2 = datetime.datetime.now()
1781
1304
if (time2 - time) >= delay:
1797
1320
try:
1798
1321
sent = session.send(client.secret[sent_size:])
1799
1322
except gnutls.errors.GNUTLSError as error:
1800
logger.warning("gnutls send failed",
1801
exc_info=error)
1323
logger.warning("gnutls send failed")
1802
1324
return
1803
1325
logger.debug("Sent: %d, remaining: %d",
1804
1326
sent, len(client.secret)
1805
1327
- (sent_size + sent))
1806
1328
sent_size += sent
1807
1329
1808
1330
logger.info("Sending secret to %s", client.name)
1809
# bump the timeout using extended_timeout
1810
client.bump_timeout(client.extended_timeout)
1331
# bump the timeout as if seen
1332
client.checked_ok()
1811
1333
if self.server.use_dbus:
1812
1334
# Emit D-Bus signal
1813
1335
client.GotSecret()
1818
1340
try:
1819
1341
session.bye()
1820
1342
except gnutls.errors.GNUTLSError as error:
1821
logger.warning("GnuTLS bye failed",
1822
exc_info=error)
1343
logger.warning("GnuTLS bye failed")
1823
1344
1824
1345
@staticmethod
1825
1346
def peer_certificate(session):
1881
1402
# Convert the buffer to a Python bytestring
1882
1403
fpr = ctypes.string_at(buf, buf_len.value)
1883
1404
# Convert the bytestring to hexadecimal notation
1884
hex_fpr = binascii.hexlify(fpr).upper()
1405
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1885
1406
return hex_fpr
1886
1407
1887
1408
1890
1411
def sub_process_main(self, request, address):
1891
1412
try:
1892
1413
self.finish_request(request, address)
1893
except Exception:
1414
except:
1894
1415
self.handle_error(request, address)
1895
1416
self.close_request(request)
1896
1417
1897
1418
def process_request(self, request, address):
1898
1419
"""Start a new process to process the request."""
1899
proc = multiprocessing.Process(target = self.sub_process_main,
1900
args = (request, address))
1901
proc.start()
1902
return proc
1903
1420
multiprocessing.Process(target = self.sub_process_main,
1421
args = (request, address)).start()
1904
1422
1905
1423
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1906
1424
""" adds a pipe to the MixIn """
1910
1428
This function creates a new pipe in self.pipe
1911
1429
"""
1912
1430
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1913
1914
proc = MultiprocessingMixIn.process_request(self, request,
1915
client_address)
1431
1432
super(MultiprocessingMixInWithPipe,
1433
self).process_request(request, client_address)
1916
1434
self.child_pipe.close()
1917
self.add_pipe(parent_pipe, proc)
1918
1919
def add_pipe(self, parent_pipe, proc):
1435
self.add_pipe(parent_pipe)
1436
1437
def add_pipe(self, parent_pipe):
1920
1438
"""Dummy function; override as necessary"""
1921
raise NotImplementedError()
1922
1439
raise NotImplementedError
1923
1440
1924
1441
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1925
1442
socketserver.TCPServer, object):
1931
1448
use_ipv6: Boolean; to use IPv6 or not
1932
1449
"""
1933
1450
def __init__(self, server_address, RequestHandlerClass,
1934
interface=None, use_ipv6=True, socketfd=None):
1935
"""If socketfd is set, use that file descriptor instead of
1936
creating a new one with socket.socket().
1937
"""
1451
interface=None, use_ipv6=True):
1938
1452
self.interface = interface
1939
1453
if use_ipv6:
1940
1454
self.address_family = socket.AF_INET6
1941
if socketfd is not None:
1942
# Save the file descriptor
1943
self.socketfd = socketfd
1944
# Save the original socket.socket() function
1945
self.socket_socket = socket.socket
1946
# To implement --socket, we monkey patch socket.socket.
1947
#
1948
# (When socketserver.TCPServer is a new-style class, we
1949
# could make self.socket into a property instead of monkey
1950
# patching socket.socket.)
1951
#
1952
# Create a one-time-only replacement for socket.socket()
1953
@functools.wraps(socket.socket)
1954
def socket_wrapper(*args, **kwargs):
1955
# Restore original function so subsequent calls are
1956
# not affected.
1957
socket.socket = self.socket_socket
1958
del self.socket_socket
1959
# This time only, return a new socket object from the
1960
# saved file descriptor.
1961
return socket.fromfd(self.socketfd, *args, **kwargs)
1962
# Replace socket.socket() function with wrapper
1963
socket.socket = socket_wrapper
1964
# The socketserver.TCPServer.__init__ will call
1965
# socket.socket(), which might be our replacement,
1966
# socket_wrapper(), if socketfd was set.
1967
1455
socketserver.TCPServer.__init__(self, server_address,
1968
1456
RequestHandlerClass)
1969
1970
1457
def server_bind(self):
1971
1458
"""This overrides the normal server_bind() function
1972
1459
to bind to an interface if one was specified, and also NOT to
1980
1467
try:
1981
1468
self.socket.setsockopt(socket.SOL_SOCKET,
1982
1469
SO_BINDTODEVICE,
1983
str(self.interface + '\0'))
1470
str(self.interface
1471
+ '\0'))
1984
1472
except socket.error as error:
1985
if error.errno == errno.EPERM:
1986
logger.error("No permission to bind to"
1987
" interface %s", self.interface)
1988
elif error.errno == errno.ENOPROTOOPT:
1473
if error[0] == errno.EPERM:
1474
logger.error("No permission to"
1475
" bind to interface %s",
1476
self.interface)
1477
elif error[0] == errno.ENOPROTOOPT:
1989
1478
logger.error("SO_BINDTODEVICE not available;"
1990
1479
" cannot bind to interface %s",
1991
1480
self.interface)
1992
elif error.errno == errno.ENODEV:
1993
logger.error("Interface %s does not exist,"
1994
" cannot bind", self.interface)
1995
1481
else:
1996
1482
raise
1997
1483
# Only bind(2) the socket if we really need to.
2000
1486
if self.address_family == socket.AF_INET6:
2001
1487
any_address = "::" # in6addr_any
2002
1488
else:
2003
any_address = "0.0.0.0" # INADDR_ANY
1489
any_address = socket.INADDR_ANY
2004
1490
self.server_address = (any_address,
2005
1491
self.server_address[1])
2006
1492
elif not self.server_address[1]:
2027
1513
"""
2028
1514
def __init__(self, server_address, RequestHandlerClass,
2029
1515
interface=None, use_ipv6=True, clients=None,
2030
gnutls_priority=None, use_dbus=True, socketfd=None):
1516
gnutls_priority=None, use_dbus=True):
2031
1517
self.enabled = False
2032
1518
self.clients = clients
2033
1519
if self.clients is None:
2034
self.clients = {}
1520
self.clients = set()
2035
1521
self.use_dbus = use_dbus
2036
1522
self.gnutls_priority = gnutls_priority
2037
1523
IPv6_TCPServer.__init__(self, server_address,
2038
1524
RequestHandlerClass,
2039
1525
interface = interface,
2040
use_ipv6 = use_ipv6,
2041
socketfd = socketfd)
1526
use_ipv6 = use_ipv6)
2042
1527
def server_activate(self):
2043
1528
if self.enabled:
2044
1529
return socketserver.TCPServer.server_activate(self)
2045
2046
1530
def enable(self):
2047
1531
self.enabled = True
2048
2049
def add_pipe(self, parent_pipe, proc):
1532
def add_pipe(self, parent_pipe):
2050
1533
# Call "handle_ipc" for both data and EOF events
2051
1534
gobject.io_add_watch(parent_pipe.fileno(),
2052
1535
gobject.IO_IN | gobject.IO_HUP,
2053
1536
functools.partial(self.handle_ipc,
2054
parent_pipe =
2055
parent_pipe,
2056
proc = proc))
2057
1537
parent_pipe = parent_pipe))
1538
2058
1539
def handle_ipc(self, source, condition, parent_pipe=None,
2059
proc = None, client_object=None):
2060
# error, or the other end of multiprocessing.Pipe has closed
2061
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2062
# Wait for other process to exit
2063
proc.join()
1540
client_object=None):
1541
condition_names = {
1542
gobject.IO_IN: "IN", # There is data to read.
1543
gobject.IO_OUT: "OUT", # Data can be written (without
1544
# blocking).
1545
gobject.IO_PRI: "PRI", # There is urgent data to read.
1546
gobject.IO_ERR: "ERR", # Error condition.
1547
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1548
# broken, usually for pipes and
1549
# sockets).
1550
}
1551
conditions_string = ' | '.join(name
1552
for cond, name in
1553
condition_names.iteritems()
1554
if cond & condition)
1555
# error or the other end of multiprocessing.Pipe has closed
1556
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2064
1557
return False
2065
1558
2066
1559
# Read a request from the child
2071
1564
fpr = request[1]
2072
1565
address = request[2]
2073
1566
2074
for c in self.clients.itervalues():
1567
for c in self.clients:
2075
1568
if c.fingerprint == fpr:
2076
1569
client = c
2077
1570
break
2080
1573
"dress: %s", fpr, address)
2081
1574
if self.use_dbus:
2082
1575
# Emit D-Bus signal
2083
mandos_dbus_service.ClientNotFound(fpr,
2084
address[0])
1576
mandos_dbus_service.ClientNotFound(fpr, address[0])
2085
1577
parent_pipe.send(False)
2086
1578
return False
2087
1579
2088
1580
gobject.io_add_watch(parent_pipe.fileno(),
2089
1581
gobject.IO_IN | gobject.IO_HUP,
2090
1582
functools.partial(self.handle_ipc,
2091
parent_pipe =
2092
parent_pipe,
2093
proc = proc,
2094
client_object =
2095
client))
1583
parent_pipe = parent_pipe,
1584
client_object = client))
2096
1585
parent_pipe.send(True)
2097
# remove the old hook in favor of the new above hook on
2098
# same fileno
1586
# remove the old hook in favor of the new above hook on same fileno
2099
1587
return False
2100
1588
if command == 'funcall':
2101
1589
funcname = request[1]
2102
1590
args = request[2]
2103
1591
kwargs = request[3]
2104
1592
2105
parent_pipe.send(('data', getattr(client_object,
2106
funcname)(*args,
2107
**kwargs)))
2108
1593
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1594
2109
1595
if command == 'getattr':
2110
1596
attrname = request[1]
2111
1597
if callable(client_object.__getattribute__(attrname)):
2112
1598
parent_pipe.send(('function',))
2113
1599
else:
2114
parent_pipe.send(('data', client_object
2115
.__getattribute__(attrname)))
1600
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2116
1601
2117
1602
if command == 'setattr':
2118
1603
attrname = request[1]
2119
1604
value = request[2]
2120
1605
setattr(client_object, attrname, value)
2121
1606
2122
1607
return True
2123
1608
2124
1609
2125
def rfc3339_duration_to_delta(duration):
2126
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2127
2128
>>> rfc3339_duration_to_delta("P7D")
2129
datetime.timedelta(7)
2130
>>> rfc3339_duration_to_delta("PT60S")
2131
datetime.timedelta(0, 60)
2132
>>> rfc3339_duration_to_delta("PT60M")
2133
datetime.timedelta(0, 3600)
2134
>>> rfc3339_duration_to_delta("PT24H")
2135
datetime.timedelta(1)
2136
>>> rfc3339_duration_to_delta("P1W")
2137
datetime.timedelta(7)
2138
>>> rfc3339_duration_to_delta("PT5M30S")
2139
datetime.timedelta(0, 330)
2140
>>> rfc3339_duration_to_delta("P1DT3M20S")
2141
datetime.timedelta(1, 200)
2142
"""
2143
2144
# Parsing an RFC 3339 duration with regular expressions is not
2145
# possible - there would have to be multiple places for the same
2146
# values, like seconds. The current code, while more esoteric, is
2147
# cleaner without depending on a parsing library. If Python had a
2148
# built-in library for parsing we would use it, but we'd like to
2149
# avoid excessive use of external libraries.
2150
2151
# New type for defining tokens, syntax, and semantics all-in-one
2152
Token = collections.namedtuple("Token",
2153
("regexp", # To match token; if
2154
# "value" is not None,
2155
# must have a "group"
2156
# containing digits
2157
"value", # datetime.timedelta or
2158
# None
2159
"followers")) # Tokens valid after
2160
# this token
2161
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2162
# the "duration" ABNF definition in RFC 3339, Appendix A.
2163
token_end = Token(re.compile(r"$"), None, frozenset())
2164
token_second = Token(re.compile(r"(\d+)S"),
2165
datetime.timedelta(seconds=1),
2166
frozenset((token_end,)))
2167
token_minute = Token(re.compile(r"(\d+)M"),
2168
datetime.timedelta(minutes=1),
2169
frozenset((token_second, token_end)))
2170
token_hour = Token(re.compile(r"(\d+)H"),
2171
datetime.timedelta(hours=1),
2172
frozenset((token_minute, token_end)))
2173
token_time = Token(re.compile(r"T"),
2174
None,
2175
frozenset((token_hour, token_minute,
2176
token_second)))
2177
token_day = Token(re.compile(r"(\d+)D"),
2178
datetime.timedelta(days=1),
2179
frozenset((token_time, token_end)))
2180
token_month = Token(re.compile(r"(\d+)M"),
2181
datetime.timedelta(weeks=4),
2182
frozenset((token_day, token_end)))
2183
token_year = Token(re.compile(r"(\d+)Y"),
2184
datetime.timedelta(weeks=52),
2185
frozenset((token_month, token_end)))
2186
token_week = Token(re.compile(r"(\d+)W"),
2187
datetime.timedelta(weeks=1),
2188
frozenset((token_end,)))
2189
token_duration = Token(re.compile(r"P"), None,
2190
frozenset((token_year, token_month,
2191
token_day, token_time,
2192
token_week))),
2193
# Define starting values
2194
value = datetime.timedelta() # Value so far
2195
found_token = None
2196
followers = frozenset(token_duration,) # Following valid tokens
2197
s = duration # String left to parse
2198
# Loop until end token is found
2199
while found_token is not token_end:
2200
# Search for any currently valid tokens
2201
for token in followers:
2202
match = token.regexp.match(s)
2203
if match is not None:
2204
# Token found
2205
if token.value is not None:
2206
# Value found, parse digits
2207
factor = int(match.group(1), 10)
2208
# Add to value so far
2209
value += factor * token.value
2210
# Strip token from string
2211
s = token.regexp.sub("", s, 1)
2212
# Go to found token
2213
found_token = token
2214
# Set valid next tokens
2215
followers = found_token.followers
2216
break
2217
else:
2218
# No currently valid tokens were found
2219
raise ValueError("Invalid RFC 3339 duration")
2220
# End token found
2221
return value
2222
2223
2224
1610
def string_to_delta(interval):
2225
1611
"""Parse a string and return a datetime.timedelta
2226
1612
2237
1623
>>> string_to_delta('5m 30s')
2238
1624
datetime.timedelta(0, 330)
2239
1625
"""
2240
2241
try:
2242
return rfc3339_duration_to_delta(interval)
2243
except ValueError:
2244
pass
2245
2246
1626
timevalue = datetime.timedelta(0)
2247
1627
for s in interval.split():
2248
1628
try:
2259
1639
elif suffix == "w":
2260
1640
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2261
1641
else:
2262
raise ValueError("Unknown suffix {0!r}"
2263
.format(suffix))
2264
except IndexError as e:
1642
raise ValueError("Unknown suffix %r" % suffix)
1643
except (ValueError, IndexError) as e:
2265
1644
raise ValueError(*(e.args))
2266
1645
timevalue += delta
2267
1646
return timevalue
2268
1647
2269
1648
1649
def if_nametoindex(interface):
1650
"""Call the C function if_nametoindex(), or equivalent
1651
1652
Note: This function cannot accept a unicode string."""
1653
global if_nametoindex
1654
try:
1655
if_nametoindex = (ctypes.cdll.LoadLibrary
1656
(ctypes.util.find_library("c"))
1657
.if_nametoindex)
1658
except (OSError, AttributeError):
1659
logger.warning("Doing if_nametoindex the hard way")
1660
def if_nametoindex(interface):
1661
"Get an interface index the hard way, i.e. using fcntl()"
1662
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1663
with contextlib.closing(socket.socket()) as s:
1664
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1665
struct.pack(str("16s16x"),
1666
interface))
1667
interface_index = struct.unpack(str("I"),
1668
ifreq[16:20])[0]
1669
return interface_index
1670
return if_nametoindex(interface)
1671
1672
2270
1673
def daemon(nochdir = False, noclose = False):
2271
1674
"""See daemon(3). Standard BSD Unix function.
2272
1675
2280
1683
sys.exit()
2281
1684
if not noclose:
2282
1685
# Close all standard open file descriptors
2283
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1686
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2284
1687
if not stat.S_ISCHR(os.fstat(null).st_mode):
2285
1688
raise OSError(errno.ENODEV,
2286
"{0} not a character device"
2287
.format(os.devnull))
1689
"%s not a character device"
1690
% os.path.devnull)
2288
1691
os.dup2(null, sys.stdin.fileno())
2289
1692
os.dup2(null, sys.stdout.fileno())
2290
1693
os.dup2(null, sys.stderr.fileno())
2299
1702
2300
1703
parser = argparse.ArgumentParser()
2301
1704
parser.add_argument("-v", "--version", action="version",
2302
version = "%(prog)s {0}".format(version),
1705
version = "%%(prog)s %s" % version,
2303
1706
help="show version number and exit")
2304
1707
parser.add_argument("-i", "--interface", metavar="IF",
2305
1708
help="Bind to interface IF")
2311
1714
help="Run self-test")
2312
1715
parser.add_argument("--debug", action="store_true",
2313
1716
help="Debug mode; run in foreground and log"
2314
" to terminal", default=None)
1717
" to terminal")
2315
1718
parser.add_argument("--debuglevel", metavar="LEVEL",
2316
1719
help="Debug level for stdout output")
2317
1720
parser.add_argument("--priority", help="GnuTLS"
2324
1727
" files")
2325
1728
parser.add_argument("--no-dbus", action="store_false",
2326
1729
dest="use_dbus", help="Do not provide D-Bus"
2327
" system bus interface", default=None)
1730
" system bus interface")
2328
1731
parser.add_argument("--no-ipv6", action="store_false",
2329
dest="use_ipv6", help="Do not use IPv6",
2330
default=None)
2331
parser.add_argument("--no-restore", action="store_false",
2332
dest="restore", help="Do not restore stored"
2333
" state", default=None)
2334
parser.add_argument("--socket", type=int,
2335
help="Specify a file descriptor to a network"
2336
" socket to use instead of creating one")
2337
parser.add_argument("--statedir", metavar="DIR",
2338
help="Directory to save/restore state in")
2339
parser.add_argument("--foreground", action="store_true",
2340
help="Run in foreground", default=None)
2341
1732
dest="use_ipv6", help="Do not use IPv6")
2342
1733
options = parser.parse_args()
2343
1734
2344
1735
if options.check:
2352
1743
"port": "",
2353
1744
"debug": "False",
2354
1745
"priority":
2355
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1746
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2356
1747
"servicename": "Mandos",
2357
1748
"use_dbus": "True",
2358
1749
"use_ipv6": "True",
2359
1750
"debuglevel": "",
2360
"restore": "True",
2361
"socket": "",
2362
"statedir": "/var/lib/mandos",
2363
"foreground": "False",
2364
1751
}
2365
1752
2366
1753
# Parse config file for server-global settings
2371
1758
# Convert the SafeConfigParser object to a dict
2372
1759
server_settings = server_config.defaults()
2373
1760
# Use the appropriate methods on the non-string config options
2374
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1761
for option in ("debug", "use_dbus", "use_ipv6"):
2375
1762
server_settings[option] = server_config.getboolean("DEFAULT",
2376
1763
option)
2377
1764
if server_settings["port"]:
2378
1765
server_settings["port"] = server_config.getint("DEFAULT",
2379
1766
"port")
2380
if server_settings["socket"]:
2381
server_settings["socket"] = server_config.getint("DEFAULT",
2382
"socket")
2383
# Later, stdin will, and stdout and stderr might, be dup'ed
2384
# over with an opened os.devnull. But we don't want this to
2385
# happen with a supplied network socket.
2386
if 0 <= server_settings["socket"] <= 2:
2387
server_settings["socket"] = os.dup(server_settings
2388
["socket"])
2389
1767
del server_config
2390
1768
2391
1769
# Override the settings from the config file with command line
2392
1770
# options, if set.
2393
1771
for option in ("interface", "address", "port", "debug",
2394
1772
"priority", "servicename", "configdir",
2395
"use_dbus", "use_ipv6", "debuglevel", "restore",
2396
"statedir", "socket", "foreground"):
1773
"use_dbus", "use_ipv6", "debuglevel"):
2397
1774
value = getattr(options, option)
2398
1775
if value is not None:
2399
1776
server_settings[option] = value
2402
1779
for option in server_settings.keys():
2403
1780
if type(server_settings[option]) is str:
2404
1781
server_settings[option] = unicode(server_settings[option])
2405
# Force all boolean options to be boolean
2406
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2407
"foreground"):
2408
server_settings[option] = bool(server_settings[option])
2409
# Debug implies foreground
2410
if server_settings["debug"]:
2411
server_settings["foreground"] = True
2412
1782
# Now we have our good server settings in "server_settings"
2413
1783
2414
1784
##################################################################
2418
1788
debuglevel = server_settings["debuglevel"]
2419
1789
use_dbus = server_settings["use_dbus"]
2420
1790
use_ipv6 = server_settings["use_ipv6"]
2421
stored_state_path = os.path.join(server_settings["statedir"],
2422
stored_state_file)
2423
foreground = server_settings["foreground"]
2424
2425
if debug:
2426
initlogger(debug, logging.DEBUG)
2427
else:
2428
if not debuglevel:
2429
initlogger(debug)
2430
else:
2431
level = getattr(logging, debuglevel.upper())
2432
initlogger(debug, level)
2433
1791
2434
1792
if server_settings["servicename"] != "Mandos":
2435
1793
syslogger.setFormatter(logging.Formatter
2436
('Mandos ({0}) [%(process)d]:'
2437
' %(levelname)s: %(message)s'
2438
.format(server_settings
2439
["servicename"])))
1794
('Mandos (%s) [%%(process)d]:'
1795
' %%(levelname)s: %%(message)s'
1796
% server_settings["servicename"]))
2440
1797
2441
1798
# Parse config file with clients
2442
client_config = configparser.SafeConfigParser(Client
2443
.client_defaults)
1799
client_defaults = { "timeout": "1h",
1800
"interval": "5m",
1801
"checker": "fping -q -- %%(host)s",
1802
"host": "",
1803
"approval_delay": "0s",
1804
"approval_duration": "1s",
1805
}
1806
client_config = configparser.SafeConfigParser(client_defaults)
2444
1807
client_config.read(os.path.join(server_settings["configdir"],
2445
1808
"clients.conf"))
2446
1809
2455
1818
use_ipv6=use_ipv6,
2456
1819
gnutls_priority=
2457
1820
server_settings["priority"],
2458
use_dbus=use_dbus,
2459
socketfd=(server_settings["socket"]
2460
or None))
2461
if not foreground:
2462
pidfilename = "/run/mandos.pid"
2463
if not os.path.isdir("/run/."):
2464
pidfilename = "/var/run/mandos.pid"
2465
pidfile = None
1821
use_dbus=use_dbus)
1822
if not debug:
1823
pidfilename = "/var/run/mandos.pid"
2466
1824
try:
2467
1825
pidfile = open(pidfilename, "w")
2468
except IOError as e:
2469
logger.error("Could not open file %r", pidfilename,
2470
exc_info=e)
1826
except IOError:
1827
logger.error("Could not open file %r", pidfilename)
2471
1828
2472
for name in ("_mandos", "mandos", "nobody"):
1829
try:
1830
uid = pwd.getpwnam("_mandos").pw_uid
1831
gid = pwd.getpwnam("_mandos").pw_gid
1832
except KeyError:
2473
1833
try:
2474
uid = pwd.getpwnam(name).pw_uid
2475
gid = pwd.getpwnam(name).pw_gid
2476
break
1834
uid = pwd.getpwnam("mandos").pw_uid
1835
gid = pwd.getpwnam("mandos").pw_gid
2477
1836
except KeyError:
2478
continue
2479
else:
2480
uid = 65534
2481
gid = 65534
1837
try:
1838
uid = pwd.getpwnam("nobody").pw_uid
1839
gid = pwd.getpwnam("nobody").pw_gid
1840
except KeyError:
1841
uid = 65534
1842
gid = 65534
2482
1843
try:
2483
1844
os.setgid(gid)
2484
1845
os.setuid(uid)
2485
1846
except OSError as error:
2486
if error.errno != errno.EPERM:
2487
raise
1847
if error[0] != errno.EPERM:
1848
raise error
2488
1849
1850
if not debug and not debuglevel:
1851
syslogger.setLevel(logging.WARNING)
1852
console.setLevel(logging.WARNING)
1853
if debuglevel:
1854
level = getattr(logging, debuglevel.upper())
1855
syslogger.setLevel(level)
1856
console.setLevel(level)
1857
2489
1858
if debug:
2490
1859
# Enable all possible GnuTLS debugging
2491
1860
2501
1870
.gnutls_global_set_log_function(debug_gnutls))
2502
1871
2503
1872
# Redirect stdin so all checkers get /dev/null
2504
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1873
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2505
1874
os.dup2(null, sys.stdin.fileno())
2506
1875
if null > 2:
2507
1876
os.close(null)
1877
else:
1878
# No console logging
1879
logger.removeHandler(console)
2508
1880
2509
1881
# Need to fork before connecting to D-Bus
2510
if not foreground:
1882
if not debug:
2511
1883
# Close all input and output, do double fork, etc.
2512
1884
daemon()
2513
1885
2514
# multiprocessing will use threads, so before we use gobject we
2515
# need to inform gobject that threads will be used.
2516
gobject.threads_init()
2517
2518
1886
global main_loop
2519
1887
# From the Avahi example code
2520
DBusGMainLoop(set_as_default=True)
1888
DBusGMainLoop(set_as_default=True )
2521
1889
main_loop = gobject.MainLoop()
2522
1890
bus = dbus.SystemBus()
2523
1891
# End of Avahi example code
2524
1892
if use_dbus:
2525
1893
try:
2526
bus_name = dbus.service.BusName("se.recompile.Mandos",
1894
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2527
1895
bus, do_not_queue=True)
2528
old_bus_name = (dbus.service.BusName
2529
("se.bsnet.fukt.Mandos", bus,
2530
do_not_queue=True))
2531
1896
except dbus.exceptions.NameExistsException as e:
2532
logger.error("Disabling D-Bus:", exc_info=e)
1897
logger.error(unicode(e) + ", disabling D-Bus")
2533
1898
use_dbus = False
2534
1899
server_settings["use_dbus"] = False
2535
1900
tcp_server.use_dbus = False
2536
1901
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2537
service = AvahiServiceToSyslog(name =
2538
server_settings["servicename"],
2539
servicetype = "_mandos._tcp",
2540
protocol = protocol, bus = bus)
1902
service = AvahiService(name = server_settings["servicename"],
1903
servicetype = "_mandos._tcp",
1904
protocol = protocol, bus = bus)
2541
1905
if server_settings["interface"]:
2542
1906
service.interface = (if_nametoindex
2543
1907
(str(server_settings["interface"])))
2548
1912
client_class = Client
2549
1913
if use_dbus:
2550
1914
client_class = functools.partial(ClientDBus, bus = bus)
2551
2552
client_settings = Client.config_parser(client_config)
2553
old_client_settings = {}
2554
clients_data = {}
2555
2556
# This is used to redirect stdout and stderr for checker processes
2557
global wnull
2558
wnull = open(os.devnull, "w") # A writable /dev/null
2559
# Only used if server is running in foreground but not in debug
2560
# mode
2561
if debug or not foreground:
2562
wnull.close()
2563
2564
# Get client data and settings from last running state.
2565
if server_settings["restore"]:
2566
try:
2567
with open(stored_state_path, "rb") as stored_state:
2568
clients_data, old_client_settings = (pickle.load
2569
(stored_state))
2570
os.remove(stored_state_path)
2571
except IOError as e:
2572
if e.errno == errno.ENOENT:
2573
logger.warning("Could not load persistent state: {0}"
2574
.format(os.strerror(e.errno)))
2575
else:
2576
logger.critical("Could not load persistent state:",
2577
exc_info=e)
2578
raise
2579
except EOFError as e:
2580
logger.warning("Could not load persistent state: "
2581
"EOFError:", exc_info=e)
2582
2583
with PGPEngine() as pgp:
2584
for client_name, client in clients_data.iteritems():
2585
# Skip removed clients
2586
if client_name not in client_settings:
2587
continue
2588
2589
# Decide which value to use after restoring saved state.
2590
# We have three different values: Old config file,
2591
# new config file, and saved state.
2592
# New config value takes precedence if it differs from old
2593
# config value, otherwise use saved state.
2594
for name, value in client_settings[client_name].items():
2595
try:
2596
# For each value in new config, check if it
2597
# differs from the old config value (Except for
2598
# the "secret" attribute)
2599
if (name != "secret" and
2600
value != old_client_settings[client_name]
2601
[name]):
2602
client[name] = value
2603
except KeyError:
2604
pass
2605
2606
# Clients who has passed its expire date can still be
2607
# enabled if its last checker was successful. Clients
2608
# whose checker succeeded before we stored its state is
2609
# assumed to have successfully run all checkers during
2610
# downtime.
2611
if client["enabled"]:
2612
if datetime.datetime.utcnow() >= client["expires"]:
2613
if not client["last_checked_ok"]:
2614
logger.warning(
2615
"disabling client {0} - Client never "
2616
"performed a successful checker"
2617
.format(client_name))
2618
client["enabled"] = False
2619
elif client["last_checker_status"] != 0:
2620
logger.warning(
2621
"disabling client {0} - Client "
2622
"last checker failed with error code {1}"
2623
.format(client_name,
2624
client["last_checker_status"]))
2625
client["enabled"] = False
2626
else:
2627
client["expires"] = (datetime.datetime
2628
.utcnow()
2629
+ client["timeout"])
2630
logger.debug("Last checker succeeded,"
2631
" keeping {0} enabled"
2632
.format(client_name))
1915
def client_config_items(config, section):
1916
special_settings = {
1917
"approved_by_default":
1918
lambda: config.getboolean(section,
1919
"approved_by_default"),
1920
}
1921
for name, value in config.items(section):
2633
1922
try:
2634
client["secret"] = (
2635
pgp.decrypt(client["encrypted_secret"],
2636
client_settings[client_name]
2637
["secret"]))
2638
except PGPError:
2639
# If decryption fails, we use secret from new settings
2640
logger.debug("Failed to decrypt {0} old secret"
2641
.format(client_name))
2642
client["secret"] = (
2643
client_settings[client_name]["secret"])
2644
2645
# Add/remove clients based on new changes made to config
2646
for client_name in (set(old_client_settings)
2647
- set(client_settings)):
2648
del clients_data[client_name]
2649
for client_name in (set(client_settings)
2650
- set(old_client_settings)):
2651
clients_data[client_name] = client_settings[client_name]
2652
2653
# Create all client objects
2654
for client_name, client in clients_data.iteritems():
2655
tcp_server.clients[client_name] = client_class(
2656
name = client_name, settings = client,
2657
server_settings = server_settings)
2658
1923
yield (name, special_settings[name]())
1924
except KeyError:
1925
yield (name, value)
1926
1927
tcp_server.clients.update(set(
1928
client_class(name = section,
1929
config= dict(client_config_items(
1930
client_config, section)))
1931
for section in client_config.sections()))
2659
1932
if not tcp_server.clients:
2660
1933
logger.warning("No clients defined")
2661
2662
if not foreground:
2663
if pidfile is not None:
2664
try:
2665
with pidfile:
2666
pid = os.getpid()
2667
pidfile.write(str(pid) + "\n".encode("utf-8"))
2668
except IOError:
2669
logger.error("Could not write to file %r with PID %d",
2670
pidfilename, pid)
2671
del pidfile
1934
1935
if not debug:
1936
try:
1937
with pidfile:
1938
pid = os.getpid()
1939
pidfile.write(str(pid) + "\n".encode("utf-8"))
1940
del pidfile
1941
except IOError:
1942
logger.error("Could not write to file %r with PID %d",
1943
pidfilename, pid)
1944
except NameError:
1945
# "pidfile" was never created
1946
pass
2672
1947
del pidfilename
2673
1948
1949
signal.signal(signal.SIGINT, signal.SIG_IGN)
1950
2674
1951
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2675
1952
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2676
1953
2677
1954
if use_dbus:
2678
@alternate_dbus_interfaces({"se.recompile.Mandos":
2679
"se.bsnet.fukt.Mandos"})
2680
class MandosDBusService(DBusObjectWithProperties):
1955
class MandosDBusService(dbus.service.Object):
2681
1956
"""A D-Bus proxy object"""
2682
1957
def __init__(self):
2683
1958
dbus.service.Object.__init__(self, bus, "/")
2684
_interface = "se.recompile.Mandos"
2685
2686
@dbus_interface_annotations(_interface)
2687
def _foo(self):
2688
return { "org.freedesktop.DBus.Property"
2689
".EmitsChangedSignal":
2690
"false"}
1959
_interface = "se.bsnet.fukt.Mandos"
2691
1960
2692
1961
@dbus.service.signal(_interface, signature="o")
2693
1962
def ClientAdded(self, objpath):
2708
1977
def GetAllClients(self):
2709
1978
"D-Bus method"
2710
1979
return dbus.Array(c.dbus_object_path
2711
for c in
2712
tcp_server.clients.itervalues())
1980
for c in tcp_server.clients)
2713
1981
2714
1982
@dbus.service.method(_interface,
2715
1983
out_signature="a{oa{sv}}")
2717
1985
"D-Bus method"
2718
1986
return dbus.Dictionary(
2719
1987
((c.dbus_object_path, c.GetAll(""))
2720
for c in tcp_server.clients.itervalues()),
1988
for c in tcp_server.clients),
2721
1989
signature="oa{sv}")
2722
1990
2723
1991
@dbus.service.method(_interface, in_signature="o")
2724
1992
def RemoveClient(self, object_path):
2725
1993
"D-Bus method"
2726
for c in tcp_server.clients.itervalues():
1994
for c in tcp_server.clients:
2727
1995
if c.dbus_object_path == object_path:
2728
del tcp_server.clients[c.name]
1996
tcp_server.clients.remove(c)
2729
1997
c.remove_from_connection()
2730
1998
# Don't signal anything except ClientRemoved
2731
1999
c.disable(quiet=True)
2742
2010
"Cleanup function; run on exit"
2743
2011
service.cleanup()
2744
2012
2745
multiprocessing.active_children()
2746
wnull.close()
2747
if not (tcp_server.clients or client_settings):
2748
return
2749
2750
# Store client before exiting. Secrets are encrypted with key
2751
# based on what config file has. If config file is
2752
# removed/edited, old secret will thus be unrecovable.
2753
clients = {}
2754
with PGPEngine() as pgp:
2755
for client in tcp_server.clients.itervalues():
2756
key = client_settings[client.name]["secret"]
2757
client.encrypted_secret = pgp.encrypt(client.secret,
2758
key)
2759
client_dict = {}
2760
2761
# A list of attributes that can not be pickled
2762
# + secret.
2763
exclude = set(("bus", "changedstate", "secret",
2764
"checker", "server_settings"))
2765
for name, typ in (inspect.getmembers
2766
(dbus.service.Object)):
2767
exclude.add(name)
2768
2769
client_dict["encrypted_secret"] = (client
2770
.encrypted_secret)
2771
for attr in client.client_structure:
2772
if attr not in exclude:
2773
client_dict[attr] = getattr(client, attr)
2774
2775
clients[client.name] = client_dict
2776
del client_settings[client.name]["secret"]
2777
2778
try:
2779
with (tempfile.NamedTemporaryFile
2780
(mode='wb', suffix=".pickle", prefix='clients-',
2781
dir=os.path.dirname(stored_state_path),
2782
delete=False)) as stored_state:
2783
pickle.dump((clients, client_settings), stored_state)
2784
tempname=stored_state.name
2785
os.rename(tempname, stored_state_path)
2786
except (IOError, OSError) as e:
2787
if not debug:
2788
try:
2789
os.remove(tempname)
2790
except NameError:
2791
pass
2792
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2793
logger.warning("Could not save persistent state: {0}"
2794
.format(os.strerror(e.errno)))
2795
else:
2796
logger.warning("Could not save persistent state:",
2797
exc_info=e)
2798
raise
2799
2800
# Delete all clients, and settings from config
2801
2013
while tcp_server.clients:
2802
name, client = tcp_server.clients.popitem()
2014
client = tcp_server.clients.pop()
2803
2015
if use_dbus:
2804
2016
client.remove_from_connection()
2017
client.disable_hook = None
2805
2018
# Don't signal anything except ClientRemoved
2806
2019
client.disable(quiet=True)
2807
2020
if use_dbus:
2808
2021
# Emit D-Bus signal
2809
mandos_dbus_service.ClientRemoved(client
2810
.dbus_object_path,
2022
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2811
2023
client.name)
2812
client_settings.clear()
2813
2024
2814
2025
atexit.register(cleanup)
2815
2026
2816
for client in tcp_server.clients.itervalues():
2027
for client in tcp_server.clients:
2817
2028
if use_dbus:
2818
2029
# Emit D-Bus signal
2819
2030
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2820
# Need to initiate checking of clients
2821
if client.enabled:
2822
client.init_checker()
2031
client.enable()
2823
2032
2824
2033
tcp_server.enable()
2825
2034
tcp_server.server_activate()
2828
2037
service.port = tcp_server.socket.getsockname()[1]
2829
2038
if use_ipv6:
2830
2039
logger.info("Now listening on address %r, port %d,"
2831
" flowinfo %d, scope_id %d",
2832
*tcp_server.socket.getsockname())
2040
" flowinfo %d, scope_id %d"
2041
% tcp_server.socket.getsockname())
2833
2042
else: # IPv4
2834
logger.info("Now listening on address %r, port %d",
2835
*tcp_server.socket.getsockname())
2043
logger.info("Now listening on address %r, port %d"
2044
% tcp_server.socket.getsockname())
2836
2045
2837
2046
#service.interface = tcp_server.socket.getsockname()[3]
2838
2047
2841
2050
try:
2842
2051
service.activate()
2843
2052
except dbus.exceptions.DBusException as error:
2844
logger.critical("D-Bus Exception", exc_info=error)
2053
logger.critical("DBusException: %s", error)
2845
2054
cleanup()
2846
2055
sys.exit(1)
2847
2056
# End of Avahi example code
2854
2063
logger.debug("Starting main loop")
2855
2064
main_loop.run()
2856
2065
except AvahiError as error:
2857
logger.critical("Avahi Error", exc_info=error)
2066
logger.critical("AvahiError: %s", error)
2858
2067
cleanup()
2859
2068
sys.exit(1)
2860
2069
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0