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- Committer: Teddy Hogeborn
- Date: 2012-05-20 14:37:17 UTC
- mfrom: (237.4.31 release)
- Revision ID: teddy@recompile.se-20120520143717-48406ypmuwgwl32f
Merge from release branch.
- files added:
- debian/source/local-options
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2010 Teddy Hogeborn
15
# Copyright © 2008-2010 Björn Påhlsson
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# Copyright © 2008-2012 Teddy Hogeborn
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# Copyright © 2008-2012 Björn Påhlsson
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16
#
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# This program is free software: you can redistribute it and/or modify
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18
# 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/>.
30
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#
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# Contact the authors at <mandos@fukt.bsnet.se>.
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# Contact the authors at <mandos@recompile.se>.
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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
37
39
import SocketServer as socketserver
38
40
import socket
39
import optparse
41
import argparse
40
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import datetime
41
43
import errno
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44
import gnutls.crypto
62
64
import functools
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import cPickle as pickle
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66
import multiprocessing
67
import types
68
import binascii
69
import tempfile
70
import itertools
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71
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import dbus
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73
import dbus.service
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78
import ctypes.util
73
79
import xml.dom.minidom
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80
import inspect
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import GnuPGInterface
75
82
76
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try:
77
84
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
81
88
except ImportError:
82
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SO_BINDTODEVICE = None
83
90
84
85
version = "1.2.3"
86
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#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
91
version = "1.5.4"
92
stored_state_file = "clients.pickle"
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94
logger = logging.getLogger()
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syslogger = (logging.handlers.SysLogHandler
90
96
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
97
address = str("/dev/log")))
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)
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.gnupg = GnuPGInterface.GnuPG()
143
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
144
self.gnupg = GnuPGInterface.GnuPG()
145
self.gnupg.options.meta_interactive = False
146
self.gnupg.options.homedir = self.tempdir
147
self.gnupg.options.extra_args.extend(['--force-mdc',
148
'--quiet',
149
'--no-use-agent'])
150
151
def __enter__(self):
152
return self
153
154
def __exit__ (self, exc_type, exc_value, traceback):
155
self._cleanup()
156
return False
157
158
def __del__(self):
159
self._cleanup()
160
161
def _cleanup(self):
162
if self.tempdir is not None:
163
# Delete contents of tempdir
164
for root, dirs, files in os.walk(self.tempdir,
165
topdown = False):
166
for filename in files:
167
os.remove(os.path.join(root, filename))
168
for dirname in dirs:
169
os.rmdir(os.path.join(root, dirname))
170
# Remove tempdir
171
os.rmdir(self.tempdir)
172
self.tempdir = None
173
174
def password_encode(self, password):
175
# Passphrase can not be empty and can not contain newlines or
176
# NUL bytes. So we prefix it and hex encode it.
177
return b"mandos" + binascii.hexlify(password)
178
179
def encrypt(self, data, password):
180
self.gnupg.passphrase = self.password_encode(password)
181
with open(os.devnull, "w") as devnull:
182
try:
183
proc = self.gnupg.run(['--symmetric'],
184
create_fhs=['stdin', 'stdout'],
185
attach_fhs={'stderr': devnull})
186
with contextlib.closing(proc.handles['stdin']) as f:
187
f.write(data)
188
with contextlib.closing(proc.handles['stdout']) as f:
189
ciphertext = f.read()
190
proc.wait()
191
except IOError as e:
192
raise PGPError(e)
193
self.gnupg.passphrase = None
194
return ciphertext
195
196
def decrypt(self, data, password):
197
self.gnupg.passphrase = self.password_encode(password)
198
with open(os.devnull, "w") as devnull:
199
try:
200
proc = self.gnupg.run(['--decrypt'],
201
create_fhs=['stdin', 'stdout'],
202
attach_fhs={'stderr': devnull})
203
with contextlib.closing(proc.handles['stdin']) as f:
204
f.write(data)
205
with contextlib.closing(proc.handles['stdout']) as f:
206
decrypted_plaintext = f.read()
207
proc.wait()
208
except IOError as e:
209
raise PGPError(e)
210
self.gnupg.passphrase = None
211
return decrypted_plaintext
212
102
213
103
214
class AvahiError(Exception):
104
215
def __init__(self, value, *args, **kwargs):
134
245
server: D-Bus Server
135
246
bus: dbus.SystemBus()
136
247
"""
248
137
249
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
250
servicetype = None, port = None, TXT = None,
139
251
domain = "", host = "", max_renames = 32768,
151
263
self.group = None # our entry group
152
264
self.server = None
153
265
self.bus = bus
266
self.entry_group_state_changed_match = None
267
154
268
def rename(self):
155
269
"""Derived from the Avahi example code"""
156
270
if self.rename_count >= self.max_renames:
158
272
" after %i retries, exiting.",
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273
self.rename_count)
160
274
raise AvahiServiceError("Too many renames")
161
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
275
self.name = unicode(self.server
276
.GetAlternativeServiceName(self.name))
162
277
logger.info("Changing Zeroconf service name to %r ...",
163
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self.name)
164
syslogger.setFormatter(logging.Formatter
165
('Mandos (%s) [%%(process)d]:'
166
' %%(levelname)s: %%(message)s'
167
% self.name))
168
279
self.remove()
169
280
try:
170
281
self.add()
171
except dbus.exceptions.DBusException, error:
172
logger.critical("DBusException: %s", error)
282
except dbus.exceptions.DBusException as error:
283
logger.critical("D-Bus Exception", exc_info=error)
173
284
self.cleanup()
174
285
os._exit(1)
175
286
self.rename_count += 1
287
176
288
def remove(self):
177
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"""Derived from the Avahi example code"""
290
if self.entry_group_state_changed_match is not None:
291
self.entry_group_state_changed_match.remove()
292
self.entry_group_state_changed_match = None
178
293
if self.group is not None:
179
294
self.group.Reset()
295
180
296
def add(self):
181
297
"""Derived from the Avahi example code"""
298
self.remove()
182
299
if self.group is None:
183
300
self.group = dbus.Interface(
184
301
self.bus.get_object(avahi.DBUS_NAME,
185
302
self.server.EntryGroupNew()),
186
303
avahi.DBUS_INTERFACE_ENTRY_GROUP)
187
self.group.connect_to_signal('StateChanged',
188
self
189
.entry_group_state_changed)
304
self.entry_group_state_changed_match = (
305
self.group.connect_to_signal(
306
'StateChanged', self.entry_group_state_changed))
190
307
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
191
308
self.name, self.type)
192
309
self.group.AddService(
198
315
dbus.UInt16(self.port),
199
316
avahi.string_array_to_txt_array(self.TXT))
200
317
self.group.Commit()
318
201
319
def entry_group_state_changed(self, state, error):
202
320
"""Derived from the Avahi example code"""
203
321
logger.debug("Avahi entry group state change: %i", state)
210
328
elif state == avahi.ENTRY_GROUP_FAILURE:
211
329
logger.critical("Avahi: Error in group state changed %s",
212
330
unicode(error))
213
raise AvahiGroupError("State changed: %s"
214
% unicode(error))
331
raise AvahiGroupError("State changed: {0!s}"
332
.format(error))
333
215
334
def cleanup(self):
216
335
"""Derived from the Avahi example code"""
217
336
if self.group is not None:
218
self.group.Free()
337
try:
338
self.group.Free()
339
except (dbus.exceptions.UnknownMethodException,
340
dbus.exceptions.DBusException):
341
pass
219
342
self.group = None
220
def server_state_changed(self, state):
343
self.remove()
344
345
def server_state_changed(self, state, error=None):
221
346
"""Derived from the Avahi example code"""
222
347
logger.debug("Avahi server state change: %i", state)
223
if state == avahi.SERVER_COLLISION:
224
logger.error("Zeroconf server name collision")
225
self.remove()
348
bad_states = { avahi.SERVER_INVALID:
349
"Zeroconf server invalid",
350
avahi.SERVER_REGISTERING: None,
351
avahi.SERVER_COLLISION:
352
"Zeroconf server name collision",
353
avahi.SERVER_FAILURE:
354
"Zeroconf server failure" }
355
if state in bad_states:
356
if bad_states[state] is not None:
357
if error is None:
358
logger.error(bad_states[state])
359
else:
360
logger.error(bad_states[state] + ": %r", error)
361
self.cleanup()
226
362
elif state == avahi.SERVER_RUNNING:
227
363
self.add()
364
else:
365
if error is None:
366
logger.debug("Unknown state: %r", state)
367
else:
368
logger.debug("Unknown state: %r: %r", state, error)
369
228
370
def activate(self):
229
371
"""Derived from the Avahi example code"""
230
372
if self.server is None:
231
373
self.server = dbus.Interface(
232
374
self.bus.get_object(avahi.DBUS_NAME,
233
avahi.DBUS_PATH_SERVER),
375
avahi.DBUS_PATH_SERVER,
376
follow_name_owner_changes=True),
234
377
avahi.DBUS_INTERFACE_SERVER)
235
378
self.server.connect_to_signal("StateChanged",
236
379
self.server_state_changed)
237
380
self.server_state_changed(self.server.GetState())
238
381
239
382
383
class AvahiServiceToSyslog(AvahiService):
384
def rename(self):
385
"""Add the new name to the syslog messages"""
386
ret = AvahiService.rename(self)
387
syslogger.setFormatter(logging.Formatter
388
('Mandos ({0}) [%(process)d]:'
389
' %(levelname)s: %(message)s'
390
.format(self.name)))
391
return ret
392
393
394
def timedelta_to_milliseconds(td):
395
"Convert a datetime.timedelta() to milliseconds"
396
return ((td.days * 24 * 60 * 60 * 1000)
397
+ (td.seconds * 1000)
398
+ (td.microseconds // 1000))
399
400
240
401
class Client(object):
241
402
"""A representation of a client host served by this server.
242
403
243
404
Attributes:
244
_approved: bool(); 'None' if not yet approved/disapproved
405
approved: bool(); 'None' if not yet approved/disapproved
245
406
approval_delay: datetime.timedelta(); Time to wait for approval
246
407
approval_duration: datetime.timedelta(); Duration of one approval
247
408
checker: subprocess.Popen(); a running checker process used
254
415
instance %(name)s can be used in the command.
255
416
checker_initiator_tag: a gobject event source tag, or None
256
417
created: datetime.datetime(); (UTC) object creation
418
client_structure: Object describing what attributes a client has
419
and is used for storing the client at exit
257
420
current_checker_command: string; current running checker_command
258
disable_hook: If set, called by disable() as disable_hook(self)
259
421
disable_initiator_tag: a gobject event source tag, or None
260
422
enabled: bool()
261
423
fingerprint: string (40 or 32 hexadecimal digits); used to
264
426
interval: datetime.timedelta(); How often to start a new checker
265
427
last_approval_request: datetime.datetime(); (UTC) or None
266
428
last_checked_ok: datetime.datetime(); (UTC) or None
267
last_enabled: datetime.datetime(); (UTC)
429
last_checker_status: integer between 0 and 255 reflecting exit
430
status of last checker. -1 reflects crashed
431
checker, -2 means no checker completed yet.
432
last_enabled: datetime.datetime(); (UTC) or None
268
433
name: string; from the config file, used in log messages and
269
434
D-Bus identifiers
270
435
secret: bytestring; sent verbatim (over TLS) to client
271
436
timeout: datetime.timedelta(); How long from last_checked_ok
272
437
until this client is disabled
438
extended_timeout: extra long timeout when secret has been sent
273
439
runtime_expansions: Allowed attributes for runtime expansion.
440
expires: datetime.datetime(); time (UTC) when a client will be
441
disabled, or None
274
442
"""
275
443
276
444
runtime_expansions = ("approval_delay", "approval_duration",
277
"created", "enabled", "fingerprint",
278
"host", "interval", "last_checked_ok",
445
"created", "enabled", "expires",
446
"fingerprint", "host", "interval",
447
"last_approval_request", "last_checked_ok",
279
448
"last_enabled", "name", "timeout")
280
281
@staticmethod
282
def _timedelta_to_milliseconds(td):
283
"Convert a datetime.timedelta() to milliseconds"
284
return ((td.days * 24 * 60 * 60 * 1000)
285
+ (td.seconds * 1000)
286
+ (td.microseconds // 1000))
449
client_defaults = { "timeout": "5m",
450
"extended_timeout": "15m",
451
"interval": "2m",
452
"checker": "fping -q -- %%(host)s",
453
"host": "",
454
"approval_delay": "0s",
455
"approval_duration": "1s",
456
"approved_by_default": "True",
457
"enabled": "True",
458
}
287
459
288
460
def timeout_milliseconds(self):
289
461
"Return the 'timeout' attribute in milliseconds"
290
return self._timedelta_to_milliseconds(self.timeout)
462
return timedelta_to_milliseconds(self.timeout)
463
464
def extended_timeout_milliseconds(self):
465
"Return the 'extended_timeout' attribute in milliseconds"
466
return timedelta_to_milliseconds(self.extended_timeout)
291
467
292
468
def interval_milliseconds(self):
293
469
"Return the 'interval' attribute in milliseconds"
294
return self._timedelta_to_milliseconds(self.interval)
295
470
return timedelta_to_milliseconds(self.interval)
471
296
472
def approval_delay_milliseconds(self):
297
return self._timedelta_to_milliseconds(self.approval_delay)
298
299
def __init__(self, name = None, disable_hook=None, config=None):
300
"""Note: the 'checker' key in 'config' sets the
301
'checker_command' attribute and *not* the 'checker'
302
attribute."""
473
return timedelta_to_milliseconds(self.approval_delay)
474
475
@staticmethod
476
def config_parser(config):
477
"""Construct a new dict of client settings of this form:
478
{ client_name: {setting_name: value, ...}, ...}
479
with exceptions for any special settings as defined above.
480
NOTE: Must be a pure function. Must return the same result
481
value given the same arguments.
482
"""
483
settings = {}
484
for client_name in config.sections():
485
section = dict(config.items(client_name))
486
client = settings[client_name] = {}
487
488
client["host"] = section["host"]
489
# Reformat values from string types to Python types
490
client["approved_by_default"] = config.getboolean(
491
client_name, "approved_by_default")
492
client["enabled"] = config.getboolean(client_name,
493
"enabled")
494
495
client["fingerprint"] = (section["fingerprint"].upper()
496
.replace(" ", ""))
497
if "secret" in section:
498
client["secret"] = section["secret"].decode("base64")
499
elif "secfile" in section:
500
with open(os.path.expanduser(os.path.expandvars
501
(section["secfile"])),
502
"rb") as secfile:
503
client["secret"] = secfile.read()
504
else:
505
raise TypeError("No secret or secfile for section {0}"
506
.format(section))
507
client["timeout"] = string_to_delta(section["timeout"])
508
client["extended_timeout"] = string_to_delta(
509
section["extended_timeout"])
510
client["interval"] = string_to_delta(section["interval"])
511
client["approval_delay"] = string_to_delta(
512
section["approval_delay"])
513
client["approval_duration"] = string_to_delta(
514
section["approval_duration"])
515
client["checker_command"] = section["checker"]
516
client["last_approval_request"] = None
517
client["last_checked_ok"] = None
518
client["last_checker_status"] = -2
519
520
return settings
521
522
def __init__(self, settings, name = None):
303
523
self.name = name
304
if config is None:
305
config = {}
524
# adding all client settings
525
for setting, value in settings.iteritems():
526
setattr(self, setting, value)
527
528
if self.enabled:
529
if not hasattr(self, "last_enabled"):
530
self.last_enabled = datetime.datetime.utcnow()
531
if not hasattr(self, "expires"):
532
self.expires = (datetime.datetime.utcnow()
533
+ self.timeout)
534
else:
535
self.last_enabled = None
536
self.expires = None
537
306
538
logger.debug("Creating client %r", self.name)
307
539
# Uppercase and remove spaces from fingerprint for later
308
540
# comparison purposes with return value from the fingerprint()
309
541
# function
310
self.fingerprint = (config["fingerprint"].upper()
311
.replace(" ", ""))
312
542
logger.debug(" Fingerprint: %s", self.fingerprint)
313
if "secret" in config:
314
self.secret = config["secret"].decode("base64")
315
elif "secfile" in config:
316
with open(os.path.expanduser(os.path.expandvars
317
(config["secfile"])),
318
"rb") as secfile:
319
self.secret = secfile.read()
320
else:
321
raise TypeError("No secret or secfile for client %s"
322
% self.name)
323
self.host = config.get("host", "")
324
self.created = datetime.datetime.utcnow()
325
self.enabled = False
326
self.last_approval_request = None
327
self.last_enabled = None
328
self.last_checked_ok = None
329
self.timeout = string_to_delta(config["timeout"])
330
self.interval = string_to_delta(config["interval"])
331
self.disable_hook = disable_hook
543
self.created = settings.get("created",
544
datetime.datetime.utcnow())
545
546
# attributes specific for this server instance
332
547
self.checker = None
333
548
self.checker_initiator_tag = None
334
549
self.disable_initiator_tag = None
335
550
self.checker_callback_tag = None
336
self.checker_command = config["checker"]
337
551
self.current_checker_command = None
338
self.last_connect = None
339
self._approved = None
340
self.approved_by_default = config.get("approved_by_default",
341
True)
552
self.approved = None
342
553
self.approvals_pending = 0
343
self.approval_delay = string_to_delta(
344
config["approval_delay"])
345
self.approval_duration = string_to_delta(
346
config["approval_duration"])
347
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
554
self.changedstate = (multiprocessing_manager
555
.Condition(multiprocessing_manager
556
.Lock()))
557
self.client_structure = [attr for attr in
558
self.__dict__.iterkeys()
559
if not attr.startswith("_")]
560
self.client_structure.append("client_structure")
561
562
for name, t in inspect.getmembers(type(self),
563
lambda obj:
564
isinstance(obj,
565
property)):
566
if not name.startswith("_"):
567
self.client_structure.append(name)
348
568
569
# Send notice to process children that client state has changed
349
570
def send_changedstate(self):
350
self.changedstate.acquire()
351
self.changedstate.notify_all()
352
self.changedstate.release()
353
571
with self.changedstate:
572
self.changedstate.notify_all()
573
354
574
def enable(self):
355
575
"""Start this client's checker and timeout hooks"""
356
576
if getattr(self, "enabled", False):
357
577
# Already enabled
358
578
return
359
self.send_changedstate()
579
self.expires = datetime.datetime.utcnow() + self.timeout
580
self.enabled = True
360
581
self.last_enabled = datetime.datetime.utcnow()
582
self.init_checker()
583
self.send_changedstate()
584
585
def disable(self, quiet=True):
586
"""Disable this client."""
587
if not getattr(self, "enabled", False):
588
return False
589
if not quiet:
590
logger.info("Disabling client %s", self.name)
591
if getattr(self, "disable_initiator_tag", None) is not None:
592
gobject.source_remove(self.disable_initiator_tag)
593
self.disable_initiator_tag = None
594
self.expires = None
595
if getattr(self, "checker_initiator_tag", None) is not None:
596
gobject.source_remove(self.checker_initiator_tag)
597
self.checker_initiator_tag = None
598
self.stop_checker()
599
self.enabled = False
600
if not quiet:
601
self.send_changedstate()
602
# Do not run this again if called by a gobject.timeout_add
603
return False
604
605
def __del__(self):
606
self.disable()
607
608
def init_checker(self):
361
609
# Schedule a new checker to be started an 'interval' from now,
362
610
# and every interval from then on.
611
if self.checker_initiator_tag is not None:
612
gobject.source_remove(self.checker_initiator_tag)
363
613
self.checker_initiator_tag = (gobject.timeout_add
364
614
(self.interval_milliseconds(),
365
615
self.start_checker))
366
616
# Schedule a disable() when 'timeout' has passed
617
if self.disable_initiator_tag is not None:
618
gobject.source_remove(self.disable_initiator_tag)
367
619
self.disable_initiator_tag = (gobject.timeout_add
368
620
(self.timeout_milliseconds(),
369
621
self.disable))
370
self.enabled = True
371
622
# Also start a new checker *right now*.
372
623
self.start_checker()
373
624
374
def disable(self, quiet=True):
375
"""Disable this client."""
376
if not getattr(self, "enabled", False):
377
return False
378
if not quiet:
379
self.send_changedstate()
380
if not quiet:
381
logger.info("Disabling client %s", self.name)
382
if getattr(self, "disable_initiator_tag", False):
383
gobject.source_remove(self.disable_initiator_tag)
384
self.disable_initiator_tag = None
385
if getattr(self, "checker_initiator_tag", False):
386
gobject.source_remove(self.checker_initiator_tag)
387
self.checker_initiator_tag = None
388
self.stop_checker()
389
if self.disable_hook:
390
self.disable_hook(self)
391
self.enabled = False
392
# Do not run this again if called by a gobject.timeout_add
393
return False
394
395
def __del__(self):
396
self.disable_hook = None
397
self.disable()
398
399
625
def checker_callback(self, pid, condition, command):
400
626
"""The checker has completed, so take appropriate actions."""
401
627
self.checker_callback_tag = None
402
628
self.checker = None
403
629
if os.WIFEXITED(condition):
404
exitstatus = os.WEXITSTATUS(condition)
405
if exitstatus == 0:
630
self.last_checker_status = os.WEXITSTATUS(condition)
631
if self.last_checker_status == 0:
406
632
logger.info("Checker for %(name)s succeeded",
407
633
vars(self))
408
634
self.checked_ok()
410
636
logger.info("Checker for %(name)s failed",
411
637
vars(self))
412
638
else:
639
self.last_checker_status = -1
413
640
logger.warning("Checker for %(name)s crashed?",
414
641
vars(self))
415
642
416
643
def checked_ok(self):
417
"""Bump up the timeout for this client.
418
419
This should only be called when the client has been seen,
420
alive and well.
421
"""
644
"""Assert that the client has been seen, alive and well."""
422
645
self.last_checked_ok = datetime.datetime.utcnow()
423
gobject.source_remove(self.disable_initiator_tag)
424
self.disable_initiator_tag = (gobject.timeout_add
425
(self.timeout_milliseconds(),
426
self.disable))
646
self.last_checker_status = 0
647
self.bump_timeout()
648
649
def bump_timeout(self, timeout=None):
650
"""Bump up the timeout for this client."""
651
if timeout is None:
652
timeout = self.timeout
653
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = None
656
if getattr(self, "enabled", False):
657
self.disable_initiator_tag = (gobject.timeout_add
658
(timedelta_to_milliseconds
659
(timeout), self.disable))
660
self.expires = datetime.datetime.utcnow() + timeout
427
661
428
662
def need_approval(self):
429
663
self.last_approval_request = datetime.datetime.utcnow()
434
668
If a checker already exists, leave it running and do
435
669
nothing."""
436
670
# The reason for not killing a running checker is that if we
437
# did that, then if a checker (for some reason) started
438
# running slowly and taking more than 'interval' time, the
439
# client would inevitably timeout, since no checker would get
440
# a chance to run to completion. If we instead leave running
671
# did that, and if a checker (for some reason) started running
672
# slowly and taking more than 'interval' time, then the client
673
# would inevitably timeout, since no checker would get a
674
# chance to run to completion. If we instead leave running
441
675
# checkers alone, the checker would have to take more time
442
676
# than 'timeout' for the client to be disabled, which is as it
443
677
# should be.
445
679
# If a checker exists, make sure it is not a zombie
446
680
try:
447
681
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
448
except (AttributeError, OSError), error:
682
except (AttributeError, OSError) as error:
449
683
if (isinstance(error, OSError)
450
684
and error.errno != errno.ECHILD):
451
685
raise error
457
691
self.current_checker_command)
458
692
# Start a new checker if needed
459
693
if self.checker is None:
694
# Escape attributes for the shell
695
escaped_attrs = dict(
696
(attr, re.escape(unicode(getattr(self, attr))))
697
for attr in
698
self.runtime_expansions)
460
699
try:
461
# In case checker_command has exactly one % operator
462
command = self.checker_command % self.host
463
except TypeError:
464
# Escape attributes for the shell
465
escaped_attrs = dict(
466
(attr,
467
re.escape(unicode(str(getattr(self, attr, "")),
468
errors=
469
'replace')))
470
for attr in
471
self.runtime_expansions)
472
473
try:
474
command = self.checker_command % escaped_attrs
475
except TypeError, error:
476
logger.error('Could not format string "%s":'
477
' %s', self.checker_command, error)
478
return True # Try again later
700
command = self.checker_command % escaped_attrs
701
except TypeError as error:
702
logger.error('Could not format string "%s"',
703
self.checker_command, exc_info=error)
704
return True # Try again later
479
705
self.current_checker_command = command
480
706
try:
481
707
logger.info("Starting checker %r for %s",
487
713
self.checker = subprocess.Popen(command,
488
714
close_fds=True,
489
715
shell=True, cwd="/")
490
self.checker_callback_tag = (gobject.child_watch_add
491
(self.checker.pid,
492
self.checker_callback,
493
data=command))
494
# The checker may have completed before the gobject
495
# watch was added. Check for this.
496
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
497
if pid:
498
gobject.source_remove(self.checker_callback_tag)
499
self.checker_callback(pid, status, command)
500
except OSError, error:
501
logger.error("Failed to start subprocess: %s",
502
error)
716
except OSError as error:
717
logger.error("Failed to start subprocess",
718
exc_info=error)
719
self.checker_callback_tag = (gobject.child_watch_add
720
(self.checker.pid,
721
self.checker_callback,
722
data=command))
723
# The checker may have completed before the gobject
724
# watch was added. Check for this.
725
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
726
if pid:
727
gobject.source_remove(self.checker_callback_tag)
728
self.checker_callback(pid, status, command)
503
729
# Re-run this periodically if run by gobject.timeout_add
504
730
return True
505
731
512
738
return
513
739
logger.debug("Stopping checker for %(name)s", vars(self))
514
740
try:
515
os.kill(self.checker.pid, signal.SIGTERM)
741
self.checker.terminate()
516
742
#time.sleep(0.5)
517
743
#if self.checker.poll() is None:
518
# os.kill(self.checker.pid, signal.SIGKILL)
519
except OSError, error:
744
# self.checker.kill()
745
except OSError as error:
520
746
if error.errno != errno.ESRCH: # No such process
521
747
raise
522
748
self.checker = None
523
749
750
524
751
def dbus_service_property(dbus_interface, signature="v",
525
752
access="readwrite", byte_arrays=False):
526
753
"""Decorators for marking methods of a DBusObjectWithProperties to
537
764
# "Set" method, so we fail early here:
538
765
if byte_arrays and signature != "ay":
539
766
raise ValueError("Byte arrays not supported for non-'ay'"
540
" signature %r" % signature)
767
" signature {0!r}".format(signature))
541
768
def decorator(func):
542
769
func._dbus_is_property = True
543
770
func._dbus_interface = dbus_interface
551
778
return decorator
552
779
553
780
781
def dbus_interface_annotations(dbus_interface):
782
"""Decorator for marking functions returning interface annotations
783
784
Usage:
785
786
@dbus_interface_annotations("org.example.Interface")
787
def _foo(self): # Function name does not matter
788
return {"org.freedesktop.DBus.Deprecated": "true",
789
"org.freedesktop.DBus.Property.EmitsChangedSignal":
790
"false"}
791
"""
792
def decorator(func):
793
func._dbus_is_interface = True
794
func._dbus_interface = dbus_interface
795
func._dbus_name = dbus_interface
796
return func
797
return decorator
798
799
800
def dbus_annotations(annotations):
801
"""Decorator to annotate D-Bus methods, signals or properties
802
Usage:
803
804
@dbus_service_property("org.example.Interface", signature="b",
805
access="r")
806
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
807
"org.freedesktop.DBus.Property."
808
"EmitsChangedSignal": "false"})
809
def Property_dbus_property(self):
810
return dbus.Boolean(False)
811
"""
812
def decorator(func):
813
func._dbus_annotations = annotations
814
return func
815
return decorator
816
817
554
818
class DBusPropertyException(dbus.exceptions.DBusException):
555
819
"""A base class for D-Bus property-related exceptions
556
820
"""
572
836
573
837
class DBusObjectWithProperties(dbus.service.Object):
574
838
"""A D-Bus object with properties.
575
839
576
840
Classes inheriting from this can use the dbus_service_property
577
841
decorator to expose methods as D-Bus properties. It exposes the
578
842
standard Get(), Set(), and GetAll() methods on the D-Bus.
579
843
"""
580
844
581
845
@staticmethod
582
def _is_dbus_property(obj):
583
return getattr(obj, "_dbus_is_property", False)
846
def _is_dbus_thing(thing):
847
"""Returns a function testing if an attribute is a D-Bus thing
848
849
If called like _is_dbus_thing("method") it returns a function
850
suitable for use as predicate to inspect.getmembers().
851
"""
852
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
853
False)
584
854
585
def _get_all_dbus_properties(self):
855
def _get_all_dbus_things(self, thing):
586
856
"""Returns a generator of (name, attribute) pairs
587
857
"""
588
return ((prop._dbus_name, prop)
589
for name, prop in
590
inspect.getmembers(self, self._is_dbus_property))
858
return ((getattr(athing.__get__(self), "_dbus_name",
859
name),
860
athing.__get__(self))
861
for cls in self.__class__.__mro__
862
for name, athing in
863
inspect.getmembers(cls,
864
self._is_dbus_thing(thing)))
591
865
592
866
def _get_dbus_property(self, interface_name, property_name):
593
867
"""Returns a bound method if one exists which is a D-Bus
594
868
property with the specified name and interface.
595
869
"""
596
for name in (property_name,
597
property_name + "_dbus_property"):
598
prop = getattr(self, name, None)
599
if (prop is None
600
or not self._is_dbus_property(prop)
601
or prop._dbus_name != property_name
602
or (interface_name and prop._dbus_interface
603
and interface_name != prop._dbus_interface)):
604
continue
605
return prop
870
for cls in self.__class__.__mro__:
871
for name, value in (inspect.getmembers
872
(cls,
873
self._is_dbus_thing("property"))):
874
if (value._dbus_name == property_name
875
and value._dbus_interface == interface_name):
876
return value.__get__(self)
877
606
878
# No such property
607
879
raise DBusPropertyNotFound(self.dbus_object_path + ":"
608
880
+ interface_name + "."
633
905
# signatures other than "ay".
634
906
if prop._dbus_signature != "ay":
635
907
raise ValueError
636
value = dbus.ByteArray(''.join(unichr(byte)
637
for byte in value))
908
value = dbus.ByteArray(b''.join(chr(byte)
909
for byte in value))
638
910
prop(value)
639
911
640
912
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
642
914
def GetAll(self, interface_name):
643
915
"""Standard D-Bus property GetAll() method, see D-Bus
644
916
standard.
645
917
646
918
Note: Will not include properties with access="write".
647
919
"""
648
all = {}
649
for name, prop in self._get_all_dbus_properties():
920
properties = {}
921
for name, prop in self._get_all_dbus_things("property"):
650
922
if (interface_name
651
923
and interface_name != prop._dbus_interface):
652
924
# Interface non-empty but did not match
656
928
continue
657
929
value = prop()
658
930
if not hasattr(value, "variant_level"):
659
all[name] = value
931
properties[name] = value
660
932
continue
661
all[name] = type(value)(value, variant_level=
662
value.variant_level+1)
663
return dbus.Dictionary(all, signature="sv")
933
properties[name] = type(value)(value, variant_level=
934
value.variant_level+1)
935
return dbus.Dictionary(properties, signature="sv")
664
936
665
937
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
666
938
out_signature="s",
667
939
path_keyword='object_path',
668
940
connection_keyword='connection')
669
941
def Introspect(self, object_path, connection):
670
"""Standard D-Bus method, overloaded to insert property tags.
942
"""Overloading of standard D-Bus method.
943
944
Inserts property tags and interface annotation tags.
671
945
"""
672
946
xmlstring = dbus.service.Object.Introspect(self, object_path,
673
947
connection)
680
954
e.setAttribute("access", prop._dbus_access)
681
955
return e
682
956
for if_tag in document.getElementsByTagName("interface"):
957
# Add property tags
683
958
for tag in (make_tag(document, name, prop)
684
959
for name, prop
685
in self._get_all_dbus_properties()
960
in self._get_all_dbus_things("property")
686
961
if prop._dbus_interface
687
962
== if_tag.getAttribute("name")):
688
963
if_tag.appendChild(tag)
964
# Add annotation tags
965
for typ in ("method", "signal", "property"):
966
for tag in if_tag.getElementsByTagName(typ):
967
annots = dict()
968
for name, prop in (self.
969
_get_all_dbus_things(typ)):
970
if (name == tag.getAttribute("name")
971
and prop._dbus_interface
972
== if_tag.getAttribute("name")):
973
annots.update(getattr
974
(prop,
975
"_dbus_annotations",
976
{}))
977
for name, value in annots.iteritems():
978
ann_tag = document.createElement(
979
"annotation")
980
ann_tag.setAttribute("name", name)
981
ann_tag.setAttribute("value", value)
982
tag.appendChild(ann_tag)
983
# Add interface annotation tags
984
for annotation, value in dict(
985
itertools.chain.from_iterable(
986
annotations().iteritems()
987
for name, annotations in
988
self._get_all_dbus_things("interface")
989
if name == if_tag.getAttribute("name")
990
)).iteritems():
991
ann_tag = document.createElement("annotation")
992
ann_tag.setAttribute("name", annotation)
993
ann_tag.setAttribute("value", value)
994
if_tag.appendChild(ann_tag)
689
995
# Add the names to the return values for the
690
996
# "org.freedesktop.DBus.Properties" methods
691
997
if (if_tag.getAttribute("name")
704
1010
xmlstring = document.toxml("utf-8")
705
1011
document.unlink()
706
1012
except (AttributeError, xml.dom.DOMException,
707
xml.parsers.expat.ExpatError), error:
1013
xml.parsers.expat.ExpatError) as error:
708
1014
logger.error("Failed to override Introspection method",
709
error)
1015
exc_info=error)
710
1016
return xmlstring
711
1017
712
1018
1019
def datetime_to_dbus (dt, variant_level=0):
1020
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1021
if dt is None:
1022
return dbus.String("", variant_level = variant_level)
1023
return dbus.String(dt.isoformat(),
1024
variant_level=variant_level)
1025
1026
1027
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1028
"""A class decorator; applied to a subclass of
1029
dbus.service.Object, it will add alternate D-Bus attributes with
1030
interface names according to the "alt_interface_names" mapping.
1031
Usage:
1032
1033
@alternate_dbus_names({"org.example.Interface":
1034
"net.example.AlternateInterface"})
1035
class SampleDBusObject(dbus.service.Object):
1036
@dbus.service.method("org.example.Interface")
1037
def SampleDBusMethod():
1038
pass
1039
1040
The above "SampleDBusMethod" on "SampleDBusObject" will be
1041
reachable via two interfaces: "org.example.Interface" and
1042
"net.example.AlternateInterface", the latter of which will have
1043
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1044
"true", unless "deprecate" is passed with a False value.
1045
1046
This works for methods and signals, and also for D-Bus properties
1047
(from DBusObjectWithProperties) and interfaces (from the
1048
dbus_interface_annotations decorator).
1049
"""
1050
def wrapper(cls):
1051
for orig_interface_name, alt_interface_name in (
1052
alt_interface_names.iteritems()):
1053
attr = {}
1054
interface_names = set()
1055
# Go though all attributes of the class
1056
for attrname, attribute in inspect.getmembers(cls):
1057
# Ignore non-D-Bus attributes, and D-Bus attributes
1058
# with the wrong interface name
1059
if (not hasattr(attribute, "_dbus_interface")
1060
or not attribute._dbus_interface
1061
.startswith(orig_interface_name)):
1062
continue
1063
# Create an alternate D-Bus interface name based on
1064
# the current name
1065
alt_interface = (attribute._dbus_interface
1066
.replace(orig_interface_name,
1067
alt_interface_name))
1068
interface_names.add(alt_interface)
1069
# Is this a D-Bus signal?
1070
if getattr(attribute, "_dbus_is_signal", False):
1071
# Extract the original non-method function by
1072
# black magic
1073
nonmethod_func = (dict(
1074
zip(attribute.func_code.co_freevars,
1075
attribute.__closure__))["func"]
1076
.cell_contents)
1077
# Create a new, but exactly alike, function
1078
# object, and decorate it to be a new D-Bus signal
1079
# with the alternate D-Bus interface name
1080
new_function = (dbus.service.signal
1081
(alt_interface,
1082
attribute._dbus_signature)
1083
(types.FunctionType(
1084
nonmethod_func.func_code,
1085
nonmethod_func.func_globals,
1086
nonmethod_func.func_name,
1087
nonmethod_func.func_defaults,
1088
nonmethod_func.func_closure)))
1089
# Copy annotations, if any
1090
try:
1091
new_function._dbus_annotations = (
1092
dict(attribute._dbus_annotations))
1093
except AttributeError:
1094
pass
1095
# Define a creator of a function to call both the
1096
# original and alternate functions, so both the
1097
# original and alternate signals gets sent when
1098
# the function is called
1099
def fixscope(func1, func2):
1100
"""This function is a scope container to pass
1101
func1 and func2 to the "call_both" function
1102
outside of its arguments"""
1103
def call_both(*args, **kwargs):
1104
"""This function will emit two D-Bus
1105
signals by calling func1 and func2"""
1106
func1(*args, **kwargs)
1107
func2(*args, **kwargs)
1108
return call_both
1109
# Create the "call_both" function and add it to
1110
# the class
1111
attr[attrname] = fixscope(attribute, new_function)
1112
# Is this a D-Bus method?
1113
elif getattr(attribute, "_dbus_is_method", False):
1114
# Create a new, but exactly alike, function
1115
# object. Decorate it to be a new D-Bus method
1116
# with the alternate D-Bus interface name. Add it
1117
# to the class.
1118
attr[attrname] = (dbus.service.method
1119
(alt_interface,
1120
attribute._dbus_in_signature,
1121
attribute._dbus_out_signature)
1122
(types.FunctionType
1123
(attribute.func_code,
1124
attribute.func_globals,
1125
attribute.func_name,
1126
attribute.func_defaults,
1127
attribute.func_closure)))
1128
# Copy annotations, if any
1129
try:
1130
attr[attrname]._dbus_annotations = (
1131
dict(attribute._dbus_annotations))
1132
except AttributeError:
1133
pass
1134
# Is this a D-Bus property?
1135
elif getattr(attribute, "_dbus_is_property", False):
1136
# Create a new, but exactly alike, function
1137
# object, and decorate it to be a new D-Bus
1138
# property with the alternate D-Bus interface
1139
# name. Add it to the class.
1140
attr[attrname] = (dbus_service_property
1141
(alt_interface,
1142
attribute._dbus_signature,
1143
attribute._dbus_access,
1144
attribute
1145
._dbus_get_args_options
1146
["byte_arrays"])
1147
(types.FunctionType
1148
(attribute.func_code,
1149
attribute.func_globals,
1150
attribute.func_name,
1151
attribute.func_defaults,
1152
attribute.func_closure)))
1153
# Copy annotations, if any
1154
try:
1155
attr[attrname]._dbus_annotations = (
1156
dict(attribute._dbus_annotations))
1157
except AttributeError:
1158
pass
1159
# Is this a D-Bus interface?
1160
elif getattr(attribute, "_dbus_is_interface", False):
1161
# Create a new, but exactly alike, function
1162
# object. Decorate it to be a new D-Bus interface
1163
# with the alternate D-Bus interface name. Add it
1164
# to the class.
1165
attr[attrname] = (dbus_interface_annotations
1166
(alt_interface)
1167
(types.FunctionType
1168
(attribute.func_code,
1169
attribute.func_globals,
1170
attribute.func_name,
1171
attribute.func_defaults,
1172
attribute.func_closure)))
1173
if deprecate:
1174
# Deprecate all alternate interfaces
1175
iname="_AlternateDBusNames_interface_annotation{0}"
1176
for interface_name in interface_names:
1177
@dbus_interface_annotations(interface_name)
1178
def func(self):
1179
return { "org.freedesktop.DBus.Deprecated":
1180
"true" }
1181
# Find an unused name
1182
for aname in (iname.format(i)
1183
for i in itertools.count()):
1184
if aname not in attr:
1185
attr[aname] = func
1186
break
1187
if interface_names:
1188
# Replace the class with a new subclass of it with
1189
# methods, signals, etc. as created above.
1190
cls = type(b"{0}Alternate".format(cls.__name__),
1191
(cls,), attr)
1192
return cls
1193
return wrapper
1194
1195
1196
@alternate_dbus_interfaces({"se.recompile.Mandos":
1197
"se.bsnet.fukt.Mandos"})
713
1198
class ClientDBus(Client, DBusObjectWithProperties):
714
1199
"""A Client class using D-Bus
715
1200
724
1209
# dbus.service.Object doesn't use super(), so we can't either.
725
1210
726
1211
def __init__(self, bus = None, *args, **kwargs):
727
self._approvals_pending = 0
728
1212
self.bus = bus
729
1213
Client.__init__(self, *args, **kwargs)
730
1214
# Only now, when this client is initialized, can it show up on
736
1220
("/clients/" + client_object_name))
737
1221
DBusObjectWithProperties.__init__(self, self.bus,
738
1222
self.dbus_object_path)
739
740
def _get_approvals_pending(self):
741
return self._approvals_pending
742
def _set_approvals_pending(self, value):
743
old_value = self._approvals_pending
744
self._approvals_pending = value
745
bval = bool(value)
746
if (hasattr(self, "dbus_object_path")
747
and bval is not bool(old_value)):
748
dbus_bool = dbus.Boolean(bval, variant_level=1)
749
self.PropertyChanged(dbus.String("ApprovalPending"),
750
dbus_bool)
751
752
approvals_pending = property(_get_approvals_pending,
753
_set_approvals_pending)
754
del _get_approvals_pending, _set_approvals_pending
755
756
@staticmethod
757
def _datetime_to_dbus(dt, variant_level=0):
758
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
return dbus.String(dt.isoformat(),
760
variant_level=variant_level)
761
762
def enable(self):
763
oldstate = getattr(self, "enabled", False)
764
r = Client.enable(self)
765
if oldstate != self.enabled:
766
# Emit D-Bus signals
767
self.PropertyChanged(dbus.String("Enabled"),
768
dbus.Boolean(True, variant_level=1))
769
self.PropertyChanged(
770
dbus.String("LastEnabled"),
771
self._datetime_to_dbus(self.last_enabled,
772
variant_level=1))
773
return r
774
775
def disable(self, quiet = False):
776
oldstate = getattr(self, "enabled", False)
777
r = Client.disable(self, quiet=quiet)
778
if not quiet and oldstate != self.enabled:
779
# Emit D-Bus signal
780
self.PropertyChanged(dbus.String("Enabled"),
781
dbus.Boolean(False, variant_level=1))
782
return r
1223
1224
def notifychangeproperty(transform_func,
1225
dbus_name, type_func=lambda x: x,
1226
variant_level=1):
1227
""" Modify a variable so that it's a property which announces
1228
its changes to DBus.
1229
1230
transform_fun: Function that takes a value and a variant_level
1231
and transforms it to a D-Bus type.
1232
dbus_name: D-Bus name of the variable
1233
type_func: Function that transform the value before sending it
1234
to the D-Bus. Default: no transform
1235
variant_level: D-Bus variant level. Default: 1
1236
"""
1237
attrname = "_{0}".format(dbus_name)
1238
def setter(self, value):
1239
if hasattr(self, "dbus_object_path"):
1240
if (not hasattr(self, attrname) or
1241
type_func(getattr(self, attrname, None))
1242
!= type_func(value)):
1243
dbus_value = transform_func(type_func(value),
1244
variant_level
1245
=variant_level)
1246
self.PropertyChanged(dbus.String(dbus_name),
1247
dbus_value)
1248
setattr(self, attrname, value)
1249
1250
return property(lambda self: getattr(self, attrname), setter)
1251
1252
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1253
approvals_pending = notifychangeproperty(dbus.Boolean,
1254
"ApprovalPending",
1255
type_func = bool)
1256
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1257
last_enabled = notifychangeproperty(datetime_to_dbus,
1258
"LastEnabled")
1259
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1260
type_func = lambda checker:
1261
checker is not None)
1262
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1263
"LastCheckedOK")
1264
last_checker_status = notifychangeproperty(dbus.Int16,
1265
"LastCheckerStatus")
1266
last_approval_request = notifychangeproperty(
1267
datetime_to_dbus, "LastApprovalRequest")
1268
approved_by_default = notifychangeproperty(dbus.Boolean,
1269
"ApprovedByDefault")
1270
approval_delay = notifychangeproperty(dbus.UInt64,
1271
"ApprovalDelay",
1272
type_func =
1273
timedelta_to_milliseconds)
1274
approval_duration = notifychangeproperty(
1275
dbus.UInt64, "ApprovalDuration",
1276
type_func = timedelta_to_milliseconds)
1277
host = notifychangeproperty(dbus.String, "Host")
1278
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1279
type_func =
1280
timedelta_to_milliseconds)
1281
extended_timeout = notifychangeproperty(
1282
dbus.UInt64, "ExtendedTimeout",
1283
type_func = timedelta_to_milliseconds)
1284
interval = notifychangeproperty(dbus.UInt64,
1285
"Interval",
1286
type_func =
1287
timedelta_to_milliseconds)
1288
checker_command = notifychangeproperty(dbus.String, "Checker")
1289
1290
del notifychangeproperty
783
1291
784
1292
def __del__(self, *args, **kwargs):
785
1293
try:
794
1302
*args, **kwargs):
795
1303
self.checker_callback_tag = None
796
1304
self.checker = None
797
# Emit D-Bus signal
798
self.PropertyChanged(dbus.String("CheckerRunning"),
799
dbus.Boolean(False, variant_level=1))
800
1305
if os.WIFEXITED(condition):
801
1306
exitstatus = os.WEXITSTATUS(condition)
802
1307
# Emit D-Bus signal
812
1317
return Client.checker_callback(self, pid, condition, command,
813
1318
*args, **kwargs)
814
1319
815
def checked_ok(self, *args, **kwargs):
816
r = Client.checked_ok(self, *args, **kwargs)
817
# Emit D-Bus signal
818
self.PropertyChanged(
819
dbus.String("LastCheckedOK"),
820
(self._datetime_to_dbus(self.last_checked_ok,
821
variant_level=1)))
822
return r
823
824
def need_approval(self, *args, **kwargs):
825
r = Client.need_approval(self, *args, **kwargs)
826
# Emit D-Bus signal
827
self.PropertyChanged(
828
dbus.String("LastApprovalRequest"),
829
(self._datetime_to_dbus(self.last_approval_request,
830
variant_level=1)))
831
return r
832
833
1320
def start_checker(self, *args, **kwargs):
834
1321
old_checker = self.checker
835
1322
if self.checker is not None:
842
1329
and old_checker_pid != self.checker.pid):
843
1330
# Emit D-Bus signal
844
1331
self.CheckerStarted(self.current_checker_command)
845
self.PropertyChanged(
846
dbus.String("CheckerRunning"),
847
dbus.Boolean(True, variant_level=1))
848
1332
return r
849
1333
850
def stop_checker(self, *args, **kwargs):
851
old_checker = getattr(self, "checker", None)
852
r = Client.stop_checker(self, *args, **kwargs)
853
if (old_checker is not None
854
and getattr(self, "checker", None) is None):
855
self.PropertyChanged(dbus.String("CheckerRunning"),
856
dbus.Boolean(False, variant_level=1))
857
return r
858
859
1334
def _reset_approved(self):
860
self._approved = None
1335
self.approved = None
861
1336
return False
862
1337
863
1338
def approve(self, value=True):
864
self.send_changedstate()
865
self._approved = value
866
gobject.timeout_add(self._timedelta_to_milliseconds
1339
self.approved = value
1340
gobject.timeout_add(timedelta_to_milliseconds
867
1341
(self.approval_duration),
868
1342
self._reset_approved)
869
1343
self.send_changedstate()
870
1344
871
1345
## D-Bus methods, signals & properties
872
_interface = "se.bsnet.fukt.Mandos.Client"
1346
_interface = "se.recompile.Mandos.Client"
1347
1348
## Interfaces
1349
1350
@dbus_interface_annotations(_interface)
1351
def _foo(self):
1352
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1353
"false"}
873
1354
874
1355
## Signals
875
1356
922
1403
# CheckedOK - method
923
1404
@dbus.service.method(_interface)
924
1405
def CheckedOK(self):
925
return self.checked_ok()
1406
self.checked_ok()
926
1407
927
1408
# Enable - method
928
1409
@dbus.service.method(_interface)
961
1442
if value is None: # get
962
1443
return dbus.Boolean(self.approved_by_default)
963
1444
self.approved_by_default = bool(value)
964
# Emit D-Bus signal
965
self.PropertyChanged(dbus.String("ApprovedByDefault"),
966
dbus.Boolean(value, variant_level=1))
967
1445
968
1446
# ApprovalDelay - property
969
1447
@dbus_service_property(_interface, signature="t",
972
1450
if value is None: # get
973
1451
return dbus.UInt64(self.approval_delay_milliseconds())
974
1452
self.approval_delay = datetime.timedelta(0, 0, 0, value)
975
# Emit D-Bus signal
976
self.PropertyChanged(dbus.String("ApprovalDelay"),
977
dbus.UInt64(value, variant_level=1))
978
1453
979
1454
# ApprovalDuration - property
980
1455
@dbus_service_property(_interface, signature="t",
981
1456
access="readwrite")
982
1457
def ApprovalDuration_dbus_property(self, value=None):
983
1458
if value is None: # get
984
return dbus.UInt64(self._timedelta_to_milliseconds(
1459
return dbus.UInt64(timedelta_to_milliseconds(
985
1460
self.approval_duration))
986
1461
self.approval_duration = datetime.timedelta(0, 0, 0, value)
987
# Emit D-Bus signal
988
self.PropertyChanged(dbus.String("ApprovalDuration"),
989
dbus.UInt64(value, variant_level=1))
990
1462
991
1463
# Name - property
992
1464
@dbus_service_property(_interface, signature="s", access="read")
1004
1476
def Host_dbus_property(self, value=None):
1005
1477
if value is None: # get
1006
1478
return dbus.String(self.host)
1007
self.host = value
1008
# Emit D-Bus signal
1009
self.PropertyChanged(dbus.String("Host"),
1010
dbus.String(value, variant_level=1))
1479
self.host = unicode(value)
1011
1480
1012
1481
# Created - property
1013
1482
@dbus_service_property(_interface, signature="s", access="read")
1014
1483
def Created_dbus_property(self):
1015
return dbus.String(self._datetime_to_dbus(self.created))
1484
return datetime_to_dbus(self.created)
1016
1485
1017
1486
# LastEnabled - property
1018
1487
@dbus_service_property(_interface, signature="s", access="read")
1019
1488
def LastEnabled_dbus_property(self):
1020
if self.last_enabled is None:
1021
return dbus.String("")
1022
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1489
return datetime_to_dbus(self.last_enabled)
1023
1490
1024
1491
# Enabled - property
1025
1492
@dbus_service_property(_interface, signature="b",
1039
1506
if value is not None:
1040
1507
self.checked_ok()
1041
1508
return
1042
if self.last_checked_ok is None:
1043
return dbus.String("")
1044
return dbus.String(self._datetime_to_dbus(self
1045
.last_checked_ok))
1509
return datetime_to_dbus(self.last_checked_ok)
1510
1511
# LastCheckerStatus - property
1512
@dbus_service_property(_interface, signature="n",
1513
access="read")
1514
def LastCheckerStatus_dbus_property(self):
1515
return dbus.Int16(self.last_checker_status)
1516
1517
# Expires - property
1518
@dbus_service_property(_interface, signature="s", access="read")
1519
def Expires_dbus_property(self):
1520
return datetime_to_dbus(self.expires)
1046
1521
1047
1522
# LastApprovalRequest - property
1048
1523
@dbus_service_property(_interface, signature="s", access="read")
1049
1524
def LastApprovalRequest_dbus_property(self):
1050
if self.last_approval_request is None:
1051
return dbus.String("")
1052
return dbus.String(self.
1053
_datetime_to_dbus(self
1054
.last_approval_request))
1525
return datetime_to_dbus(self.last_approval_request)
1055
1526
1056
1527
# Timeout - property
1057
1528
@dbus_service_property(_interface, signature="t",
1059
1530
def Timeout_dbus_property(self, value=None):
1060
1531
if value is None: # get
1061
1532
return dbus.UInt64(self.timeout_milliseconds())
1533
old_timeout = self.timeout
1062
1534
self.timeout = datetime.timedelta(0, 0, 0, value)
1063
# Emit D-Bus signal
1064
self.PropertyChanged(dbus.String("Timeout"),
1065
dbus.UInt64(value, variant_level=1))
1066
if getattr(self, "disable_initiator_tag", None) is None:
1067
return
1068
# Reschedule timeout
1069
gobject.source_remove(self.disable_initiator_tag)
1070
self.disable_initiator_tag = None
1071
time_to_die = (self.
1072
_timedelta_to_milliseconds((self
1073
.last_checked_ok
1074
+ self.timeout)
1075
- datetime.datetime
1076
.utcnow()))
1077
if time_to_die <= 0:
1078
# The timeout has passed
1079
self.disable()
1080
else:
1081
self.disable_initiator_tag = (gobject.timeout_add
1082
(time_to_die, self.disable))
1535
# Reschedule disabling
1536
if self.enabled:
1537
now = datetime.datetime.utcnow()
1538
self.expires += self.timeout - old_timeout
1539
if self.expires <= now:
1540
# The timeout has passed
1541
self.disable()
1542
else:
1543
if (getattr(self, "disable_initiator_tag", None)
1544
is None):
1545
return
1546
gobject.source_remove(self.disable_initiator_tag)
1547
self.disable_initiator_tag = (
1548
gobject.timeout_add(
1549
timedelta_to_milliseconds(self.expires - now),
1550
self.disable))
1551
1552
# ExtendedTimeout - property
1553
@dbus_service_property(_interface, signature="t",
1554
access="readwrite")
1555
def ExtendedTimeout_dbus_property(self, value=None):
1556
if value is None: # get
1557
return dbus.UInt64(self.extended_timeout_milliseconds())
1558
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1083
1559
1084
1560
# Interval - property
1085
1561
@dbus_service_property(_interface, signature="t",
1088
1564
if value is None: # get
1089
1565
return dbus.UInt64(self.interval_milliseconds())
1090
1566
self.interval = datetime.timedelta(0, 0, 0, value)
1091
# Emit D-Bus signal
1092
self.PropertyChanged(dbus.String("Interval"),
1093
dbus.UInt64(value, variant_level=1))
1094
1567
if getattr(self, "checker_initiator_tag", None) is None:
1095
1568
return
1096
# Reschedule checker run
1097
gobject.source_remove(self.checker_initiator_tag)
1098
self.checker_initiator_tag = (gobject.timeout_add
1099
(value, self.start_checker))
1100
self.start_checker() # Start one now, too
1101
1569
if self.enabled:
1570
# Reschedule checker run
1571
gobject.source_remove(self.checker_initiator_tag)
1572
self.checker_initiator_tag = (gobject.timeout_add
1573
(value, self.start_checker))
1574
self.start_checker() # Start one now, too
1575
1102
1576
# Checker - property
1103
1577
@dbus_service_property(_interface, signature="s",
1104
1578
access="readwrite")
1105
1579
def Checker_dbus_property(self, value=None):
1106
1580
if value is None: # get
1107
1581
return dbus.String(self.checker_command)
1108
self.checker_command = value
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Checker"),
1111
dbus.String(self.checker_command,
1112
variant_level=1))
1582
self.checker_command = unicode(value)
1113
1583
1114
1584
# CheckerRunning - property
1115
1585
@dbus_service_property(_interface, signature="b",
1142
1612
self._pipe.send(('init', fpr, address))
1143
1613
if not self._pipe.recv():
1144
1614
raise KeyError()
1145
1615
1146
1616
def __getattribute__(self, name):
1147
if(name == '_pipe'):
1617
if name == '_pipe':
1148
1618
return super(ProxyClient, self).__getattribute__(name)
1149
1619
self._pipe.send(('getattr', name))
1150
1620
data = self._pipe.recv()
1155
1625
self._pipe.send(('funcall', name, args, kwargs))
1156
1626
return self._pipe.recv()[1]
1157
1627
return func
1158
1628
1159
1629
def __setattr__(self, name, value):
1160
if(name == '_pipe'):
1630
if name == '_pipe':
1161
1631
return super(ProxyClient, self).__setattr__(name, value)
1162
1632
self._pipe.send(('setattr', name, value))
1163
1633
1174
1644
unicode(self.client_address))
1175
1645
logger.debug("Pipe FD: %d",
1176
1646
self.server.child_pipe.fileno())
1177
1647
1178
1648
session = (gnutls.connection
1179
1649
.ClientSession(self.request,
1180
1650
gnutls.connection
1181
1651
.X509Credentials()))
1182
1652
1183
1653
# Note: gnutls.connection.X509Credentials is really a
1184
1654
# generic GnuTLS certificate credentials object so long as
1185
1655
# no X.509 keys are added to it. Therefore, we can use it
1186
1656
# here despite using OpenPGP certificates.
1187
1657
1188
1658
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1189
1659
# "+AES-256-CBC", "+SHA1",
1190
1660
# "+COMP-NULL", "+CTYPE-OPENPGP",
1196
1666
(gnutls.library.functions
1197
1667
.gnutls_priority_set_direct(session._c_object,
1198
1668
priority, None))
1199
1669
1200
1670
# Start communication using the Mandos protocol
1201
1671
# Get protocol number
1202
1672
line = self.request.makefile().readline()
1204
1674
try:
1205
1675
if int(line.strip().split()[0]) > 1:
1206
1676
raise RuntimeError
1207
except (ValueError, IndexError, RuntimeError), error:
1677
except (ValueError, IndexError, RuntimeError) as error:
1208
1678
logger.error("Unknown protocol version: %s", error)
1209
1679
return
1210
1680
1211
1681
# Start GnuTLS connection
1212
1682
try:
1213
1683
session.handshake()
1214
except gnutls.errors.GNUTLSError, error:
1684
except gnutls.errors.GNUTLSError as error:
1215
1685
logger.warning("Handshake failed: %s", error)
1216
1686
# Do not run session.bye() here: the session is not
1217
1687
# established. Just abandon the request.
1218
1688
return
1219
1689
logger.debug("Handshake succeeded")
1220
1690
1221
1691
approval_required = False
1222
1692
try:
1223
1693
try:
1224
1694
fpr = self.fingerprint(self.peer_certificate
1225
1695
(session))
1226
except (TypeError, gnutls.errors.GNUTLSError), error:
1696
except (TypeError,
1697
gnutls.errors.GNUTLSError) as error:
1227
1698
logger.warning("Bad certificate: %s", error)
1228
1699
return
1229
1700
logger.debug("Fingerprint: %s", fpr)
1230
1701
1231
1702
try:
1232
1703
client = ProxyClient(child_pipe, fpr,
1233
1704
self.client_address)
1241
1712
1242
1713
while True:
1243
1714
if not client.enabled:
1244
logger.warning("Client %s is disabled",
1715
logger.info("Client %s is disabled",
1245
1716
client.name)
1246
1717
if self.server.use_dbus:
1247
1718
# Emit D-Bus signal
1248
client.Rejected("Disabled")
1719
client.Rejected("Disabled")
1249
1720
return
1250
1721
1251
if client._approved or not client.approval_delay:
1722
if client.approved or not client.approval_delay:
1252
1723
#We are approved or approval is disabled
1253
1724
break
1254
elif client._approved is None:
1725
elif client.approved is None:
1255
1726
logger.info("Client %s needs approval",
1256
1727
client.name)
1257
1728
if self.server.use_dbus:
1268
1739
return
1269
1740
1270
1741
#wait until timeout or approved
1271
#x = float(client._timedelta_to_milliseconds(delay))
1272
1742
time = datetime.datetime.now()
1273
1743
client.changedstate.acquire()
1274
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1744
client.changedstate.wait(
1745
float(timedelta_to_milliseconds(delay)
1746
/ 1000))
1275
1747
client.changedstate.release()
1276
1748
time2 = datetime.datetime.now()
1277
1749
if (time2 - time) >= delay:
1292
1764
while sent_size < len(client.secret):
1293
1765
try:
1294
1766
sent = session.send(client.secret[sent_size:])
1295
except (gnutls.errors.GNUTLSError), error:
1296
logger.warning("gnutls send failed")
1767
except gnutls.errors.GNUTLSError as error:
1768
logger.warning("gnutls send failed",
1769
exc_info=error)
1297
1770
return
1298
1771
logger.debug("Sent: %d, remaining: %d",
1299
1772
sent, len(client.secret)
1300
1773
- (sent_size + sent))
1301
1774
sent_size += sent
1302
1775
1303
1776
logger.info("Sending secret to %s", client.name)
1304
# bump the timeout as if seen
1305
client.checked_ok()
1777
# bump the timeout using extended_timeout
1778
client.bump_timeout(client.extended_timeout)
1306
1779
if self.server.use_dbus:
1307
1780
# Emit D-Bus signal
1308
1781
client.GotSecret()
1312
1785
client.approvals_pending -= 1
1313
1786
try:
1314
1787
session.bye()
1315
except (gnutls.errors.GNUTLSError), error:
1316
logger.warning("GnuTLS bye failed")
1788
except gnutls.errors.GNUTLSError as error:
1789
logger.warning("GnuTLS bye failed",
1790
exc_info=error)
1317
1791
1318
1792
@staticmethod
1319
1793
def peer_certificate(session):
1375
1849
# Convert the buffer to a Python bytestring
1376
1850
fpr = ctypes.string_at(buf, buf_len.value)
1377
1851
# Convert the bytestring to hexadecimal notation
1378
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1852
hex_fpr = binascii.hexlify(fpr).upper()
1379
1853
return hex_fpr
1380
1854
1381
1855
1384
1858
def sub_process_main(self, request, address):
1385
1859
try:
1386
1860
self.finish_request(request, address)
1387
except:
1861
except Exception:
1388
1862
self.handle_error(request, address)
1389
1863
self.close_request(request)
1390
1864
1391
1865
def process_request(self, request, address):
1392
1866
"""Start a new process to process the request."""
1393
multiprocessing.Process(target = self.sub_process_main,
1394
args = (request, address)).start()
1867
proc = multiprocessing.Process(target = self.sub_process_main,
1868
args = (request, address))
1869
proc.start()
1870
return proc
1871
1395
1872
1396
1873
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1397
1874
""" adds a pipe to the MixIn """
1401
1878
This function creates a new pipe in self.pipe
1402
1879
"""
1403
1880
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1404
1405
super(MultiprocessingMixInWithPipe,
1406
self).process_request(request, client_address)
1881
1882
proc = MultiprocessingMixIn.process_request(self, request,
1883
client_address)
1407
1884
self.child_pipe.close()
1408
self.add_pipe(parent_pipe)
1409
1410
def add_pipe(self, parent_pipe):
1885
self.add_pipe(parent_pipe, proc)
1886
1887
def add_pipe(self, parent_pipe, proc):
1411
1888
"""Dummy function; override as necessary"""
1412
pass
1889
raise NotImplementedError
1890
1413
1891
1414
1892
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1415
1893
socketserver.TCPServer, object):
1442
1920
SO_BINDTODEVICE,
1443
1921
str(self.interface
1444
1922
+ '\0'))
1445
except socket.error, error:
1446
if error[0] == errno.EPERM:
1923
except socket.error as error:
1924
if error.errno == errno.EPERM:
1447
1925
logger.error("No permission to"
1448
1926
" bind to interface %s",
1449
1927
self.interface)
1450
elif error[0] == errno.ENOPROTOOPT:
1928
elif error.errno == errno.ENOPROTOOPT:
1451
1929
logger.error("SO_BINDTODEVICE not available;"
1452
1930
" cannot bind to interface %s",
1453
1931
self.interface)
1932
elif error.errno == errno.ENODEV:
1933
logger.error("Interface %s does not"
1934
" exist, cannot bind",
1935
self.interface)
1454
1936
else:
1455
1937
raise
1456
1938
# Only bind(2) the socket if we really need to.
1490
1972
self.enabled = False
1491
1973
self.clients = clients
1492
1974
if self.clients is None:
1493
self.clients = set()
1975
self.clients = {}
1494
1976
self.use_dbus = use_dbus
1495
1977
self.gnutls_priority = gnutls_priority
1496
1978
IPv6_TCPServer.__init__(self, server_address,
1500
1982
def server_activate(self):
1501
1983
if self.enabled:
1502
1984
return socketserver.TCPServer.server_activate(self)
1985
1503
1986
def enable(self):
1504
1987
self.enabled = True
1505
def add_pipe(self, parent_pipe):
1988
1989
def add_pipe(self, parent_pipe, proc):
1506
1990
# Call "handle_ipc" for both data and EOF events
1507
1991
gobject.io_add_watch(parent_pipe.fileno(),
1508
1992
gobject.IO_IN | gobject.IO_HUP,
1509
1993
functools.partial(self.handle_ipc,
1510
parent_pipe = parent_pipe))
1511
1994
parent_pipe =
1995
parent_pipe,
1996
proc = proc))
1997
1512
1998
def handle_ipc(self, source, condition, parent_pipe=None,
1513
client_object=None):
1514
condition_names = {
1515
gobject.IO_IN: "IN", # There is data to read.
1516
gobject.IO_OUT: "OUT", # Data can be written (without
1517
# blocking).
1518
gobject.IO_PRI: "PRI", # There is urgent data to read.
1519
gobject.IO_ERR: "ERR", # Error condition.
1520
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1521
# broken, usually for pipes and
1522
# sockets).
1523
}
1524
conditions_string = ' | '.join(name
1525
for cond, name in
1526
condition_names.iteritems()
1527
if cond & condition)
1528
# error or the other end of multiprocessing.Pipe has closed
1529
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1999
proc = None, client_object=None):
2000
# error, or the other end of multiprocessing.Pipe has closed
2001
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2002
# Wait for other process to exit
2003
proc.join()
1530
2004
return False
1531
2005
1532
2006
# Read a request from the child
1537
2011
fpr = request[1]
1538
2012
address = request[2]
1539
2013
1540
for c in self.clients:
2014
for c in self.clients.itervalues():
1541
2015
if c.fingerprint == fpr:
1542
2016
client = c
1543
2017
break
1544
2018
else:
1545
logger.warning("Client not found for fingerprint: %s, ad"
1546
"dress: %s", fpr, address)
2019
logger.info("Client not found for fingerprint: %s, ad"
2020
"dress: %s", fpr, address)
1547
2021
if self.use_dbus:
1548
2022
# Emit D-Bus signal
1549
mandos_dbus_service.ClientNotFound(fpr, address[0])
2023
mandos_dbus_service.ClientNotFound(fpr,
2024
address[0])
1550
2025
parent_pipe.send(False)
1551
2026
return False
1552
2027
1553
2028
gobject.io_add_watch(parent_pipe.fileno(),
1554
2029
gobject.IO_IN | gobject.IO_HUP,
1555
2030
functools.partial(self.handle_ipc,
1556
parent_pipe = parent_pipe,
1557
client_object = client))
2031
parent_pipe =
2032
parent_pipe,
2033
proc = proc,
2034
client_object =
2035
client))
1558
2036
parent_pipe.send(True)
1559
# remove the old hook in favor of the new above hook on same fileno
2037
# remove the old hook in favor of the new above hook on
2038
# same fileno
1560
2039
return False
1561
2040
if command == 'funcall':
1562
2041
funcname = request[1]
1563
2042
args = request[2]
1564
2043
kwargs = request[3]
1565
2044
1566
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1567
2045
parent_pipe.send(('data', getattr(client_object,
2046
funcname)(*args,
2047
**kwargs)))
2048
1568
2049
if command == 'getattr':
1569
2050
attrname = request[1]
1570
2051
if callable(client_object.__getattribute__(attrname)):
1571
2052
parent_pipe.send(('function',))
1572
2053
else:
1573
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2054
parent_pipe.send(('data', client_object
2055
.__getattribute__(attrname)))
1574
2056
1575
2057
if command == 'setattr':
1576
2058
attrname = request[1]
1577
2059
value = request[2]
1578
2060
setattr(client_object, attrname, value)
1579
2061
1580
2062
return True
1581
2063
1582
2064
1612
2094
elif suffix == "w":
1613
2095
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1614
2096
else:
1615
raise ValueError("Unknown suffix %r" % suffix)
1616
except (ValueError, IndexError), e:
1617
raise ValueError(e.message)
2097
raise ValueError("Unknown suffix {0!r}"
2098
.format(suffix))
2099
except (ValueError, IndexError) as e:
2100
raise ValueError(*(e.args))
1618
2101
timevalue += delta
1619
2102
return timevalue
1620
2103
1621
2104
1622
def if_nametoindex(interface):
1623
"""Call the C function if_nametoindex(), or equivalent
1624
1625
Note: This function cannot accept a unicode string."""
1626
global if_nametoindex
1627
try:
1628
if_nametoindex = (ctypes.cdll.LoadLibrary
1629
(ctypes.util.find_library("c"))
1630
.if_nametoindex)
1631
except (OSError, AttributeError):
1632
logger.warning("Doing if_nametoindex the hard way")
1633
def if_nametoindex(interface):
1634
"Get an interface index the hard way, i.e. using fcntl()"
1635
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1636
with contextlib.closing(socket.socket()) as s:
1637
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
struct.pack(str("16s16x"),
1639
interface))
1640
interface_index = struct.unpack(str("I"),
1641
ifreq[16:20])[0]
1642
return interface_index
1643
return if_nametoindex(interface)
1644
1645
1646
2105
def daemon(nochdir = False, noclose = False):
1647
2106
"""See daemon(3). Standard BSD Unix function.
1648
2107
1656
2115
sys.exit()
1657
2116
if not noclose:
1658
2117
# Close all standard open file descriptors
1659
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2118
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1660
2119
if not stat.S_ISCHR(os.fstat(null).st_mode):
1661
2120
raise OSError(errno.ENODEV,
1662
"%s not a character device"
1663
% os.path.devnull)
2121
"{0} not a character device"
2122
.format(os.devnull))
1664
2123
os.dup2(null, sys.stdin.fileno())
1665
2124
os.dup2(null, sys.stdout.fileno())
1666
2125
os.dup2(null, sys.stderr.fileno())
1673
2132
##################################################################
1674
2133
# Parsing of options, both command line and config file
1675
2134
1676
parser = optparse.OptionParser(version = "%%prog %s" % version)
1677
parser.add_option("-i", "--interface", type="string",
1678
metavar="IF", help="Bind to interface IF")
1679
parser.add_option("-a", "--address", type="string",
1680
help="Address to listen for requests on")
1681
parser.add_option("-p", "--port", type="int",
1682
help="Port number to receive requests on")
1683
parser.add_option("--check", action="store_true",
1684
help="Run self-test")
1685
parser.add_option("--debug", action="store_true",
1686
help="Debug mode; run in foreground and log to"
1687
" terminal")
1688
parser.add_option("--debuglevel", type="string", metavar="LEVEL",
1689
help="Debug level for stdout output")
1690
parser.add_option("--priority", type="string", help="GnuTLS"
1691
" priority string (see GnuTLS documentation)")
1692
parser.add_option("--servicename", type="string",
1693
metavar="NAME", help="Zeroconf service name")
1694
parser.add_option("--configdir", type="string",
1695
default="/etc/mandos", metavar="DIR",
1696
help="Directory to search for configuration"
1697
" files")
1698
parser.add_option("--no-dbus", action="store_false",
1699
dest="use_dbus", help="Do not provide D-Bus"
1700
" system bus interface")
1701
parser.add_option("--no-ipv6", action="store_false",
1702
dest="use_ipv6", help="Do not use IPv6")
1703
options = parser.parse_args()[0]
2135
parser = argparse.ArgumentParser()
2136
parser.add_argument("-v", "--version", action="version",
2137
version = "%(prog)s {0}".format(version),
2138
help="show version number and exit")
2139
parser.add_argument("-i", "--interface", metavar="IF",
2140
help="Bind to interface IF")
2141
parser.add_argument("-a", "--address",
2142
help="Address to listen for requests on")
2143
parser.add_argument("-p", "--port", type=int,
2144
help="Port number to receive requests on")
2145
parser.add_argument("--check", action="store_true",
2146
help="Run self-test")
2147
parser.add_argument("--debug", action="store_true",
2148
help="Debug mode; run in foreground and log"
2149
" to terminal")
2150
parser.add_argument("--debuglevel", metavar="LEVEL",
2151
help="Debug level for stdout output")
2152
parser.add_argument("--priority", help="GnuTLS"
2153
" priority string (see GnuTLS documentation)")
2154
parser.add_argument("--servicename",
2155
metavar="NAME", help="Zeroconf service name")
2156
parser.add_argument("--configdir",
2157
default="/etc/mandos", metavar="DIR",
2158
help="Directory to search for configuration"
2159
" files")
2160
parser.add_argument("--no-dbus", action="store_false",
2161
dest="use_dbus", help="Do not provide D-Bus"
2162
" system bus interface")
2163
parser.add_argument("--no-ipv6", action="store_false",
2164
dest="use_ipv6", help="Do not use IPv6")
2165
parser.add_argument("--no-restore", action="store_false",
2166
dest="restore", help="Do not restore stored"
2167
" state")
2168
parser.add_argument("--statedir", metavar="DIR",
2169
help="Directory to save/restore state in")
2170
2171
options = parser.parse_args()
1704
2172
1705
2173
if options.check:
1706
2174
import doctest
1718
2186
"use_dbus": "True",
1719
2187
"use_ipv6": "True",
1720
2188
"debuglevel": "",
2189
"restore": "True",
2190
"statedir": "/var/lib/mandos"
1721
2191
}
1722
2192
1723
2193
# Parse config file for server-global settings
1740
2210
# options, if set.
1741
2211
for option in ("interface", "address", "port", "debug",
1742
2212
"priority", "servicename", "configdir",
1743
"use_dbus", "use_ipv6", "debuglevel"):
2213
"use_dbus", "use_ipv6", "debuglevel", "restore",
2214
"statedir"):
1744
2215
value = getattr(options, option)
1745
2216
if value is not None:
1746
2217
server_settings[option] = value
1758
2229
debuglevel = server_settings["debuglevel"]
1759
2230
use_dbus = server_settings["use_dbus"]
1760
2231
use_ipv6 = server_settings["use_ipv6"]
1761
2232
stored_state_path = os.path.join(server_settings["statedir"],
2233
stored_state_file)
2234
2235
if debug:
2236
initlogger(debug, logging.DEBUG)
2237
else:
2238
if not debuglevel:
2239
initlogger(debug)
2240
else:
2241
level = getattr(logging, debuglevel.upper())
2242
initlogger(debug, level)
2243
1762
2244
if server_settings["servicename"] != "Mandos":
1763
2245
syslogger.setFormatter(logging.Formatter
1764
('Mandos (%s) [%%(process)d]:'
1765
' %%(levelname)s: %%(message)s'
1766
% server_settings["servicename"]))
2246
('Mandos ({0}) [%(process)d]:'
2247
' %(levelname)s: %(message)s'
2248
.format(server_settings
2249
["servicename"])))
1767
2250
1768
2251
# Parse config file with clients
1769
client_defaults = { "timeout": "1h",
1770
"interval": "5m",
1771
"checker": "fping -q -- %%(host)s",
1772
"host": "",
1773
"approval_delay": "0s",
1774
"approval_duration": "1s",
1775
}
1776
client_config = configparser.SafeConfigParser(client_defaults)
2252
client_config = configparser.SafeConfigParser(Client
2253
.client_defaults)
1777
2254
client_config.read(os.path.join(server_settings["configdir"],
1778
2255
"clients.conf"))
1779
2256
1793
2270
pidfilename = "/var/run/mandos.pid"
1794
2271
try:
1795
2272
pidfile = open(pidfilename, "w")
1796
except IOError:
1797
logger.error("Could not open file %r", pidfilename)
2273
except IOError as e:
2274
logger.error("Could not open file %r", pidfilename,
2275
exc_info=e)
1798
2276
1799
try:
1800
uid = pwd.getpwnam("_mandos").pw_uid
1801
gid = pwd.getpwnam("_mandos").pw_gid
1802
except KeyError:
2277
for name in ("_mandos", "mandos", "nobody"):
1803
2278
try:
1804
uid = pwd.getpwnam("mandos").pw_uid
1805
gid = pwd.getpwnam("mandos").pw_gid
2279
uid = pwd.getpwnam(name).pw_uid
2280
gid = pwd.getpwnam(name).pw_gid
2281
break
1806
2282
except KeyError:
1807
try:
1808
uid = pwd.getpwnam("nobody").pw_uid
1809
gid = pwd.getpwnam("nobody").pw_gid
1810
except KeyError:
1811
uid = 65534
1812
gid = 65534
2283
continue
2284
else:
2285
uid = 65534
2286
gid = 65534
1813
2287
try:
1814
2288
os.setgid(gid)
1815
2289
os.setuid(uid)
1816
except OSError, error:
1817
if error[0] != errno.EPERM:
2290
except OSError as error:
2291
if error.errno != errno.EPERM:
1818
2292
raise error
1819
2293
1820
if not debug and not debuglevel:
1821
syslogger.setLevel(logging.WARNING)
1822
console.setLevel(logging.WARNING)
1823
if debuglevel:
1824
level = getattr(logging, debuglevel.upper())
1825
syslogger.setLevel(level)
1826
console.setLevel(level)
1827
1828
2294
if debug:
1829
2295
# Enable all possible GnuTLS debugging
1830
2296
1840
2306
.gnutls_global_set_log_function(debug_gnutls))
1841
2307
1842
2308
# Redirect stdin so all checkers get /dev/null
1843
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2309
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1844
2310
os.dup2(null, sys.stdin.fileno())
1845
2311
if null > 2:
1846
2312
os.close(null)
1847
else:
1848
# No console logging
1849
logger.removeHandler(console)
1850
2313
1851
2314
# Need to fork before connecting to D-Bus
1852
2315
if not debug:
1853
2316
# Close all input and output, do double fork, etc.
1854
2317
daemon()
1855
2318
2319
gobject.threads_init()
2320
1856
2321
global main_loop
1857
2322
# From the Avahi example code
1858
DBusGMainLoop(set_as_default=True )
2323
DBusGMainLoop(set_as_default=True)
1859
2324
main_loop = gobject.MainLoop()
1860
2325
bus = dbus.SystemBus()
1861
2326
# End of Avahi example code
1862
2327
if use_dbus:
1863
2328
try:
1864
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2329
bus_name = dbus.service.BusName("se.recompile.Mandos",
1865
2330
bus, do_not_queue=True)
1866
except dbus.exceptions.NameExistsException, e:
1867
logger.error(unicode(e) + ", disabling D-Bus")
2331
old_bus_name = (dbus.service.BusName
2332
("se.bsnet.fukt.Mandos", bus,
2333
do_not_queue=True))
2334
except dbus.exceptions.NameExistsException as e:
2335
logger.error("Disabling D-Bus:", exc_info=e)
1868
2336
use_dbus = False
1869
2337
server_settings["use_dbus"] = False
1870
2338
tcp_server.use_dbus = False
1871
2339
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1872
service = AvahiService(name = server_settings["servicename"],
1873
servicetype = "_mandos._tcp",
1874
protocol = protocol, bus = bus)
2340
service = AvahiServiceToSyslog(name =
2341
server_settings["servicename"],
2342
servicetype = "_mandos._tcp",
2343
protocol = protocol, bus = bus)
1875
2344
if server_settings["interface"]:
1876
2345
service.interface = (if_nametoindex
1877
2346
(str(server_settings["interface"])))
1882
2351
client_class = Client
1883
2352
if use_dbus:
1884
2353
client_class = functools.partial(ClientDBus, bus = bus)
1885
def client_config_items(config, section):
1886
special_settings = {
1887
"approved_by_default":
1888
lambda: config.getboolean(section,
1889
"approved_by_default"),
1890
}
1891
for name, value in config.items(section):
2354
2355
client_settings = Client.config_parser(client_config)
2356
old_client_settings = {}
2357
clients_data = {}
2358
2359
# Get client data and settings from last running state.
2360
if server_settings["restore"]:
2361
try:
2362
with open(stored_state_path, "rb") as stored_state:
2363
clients_data, old_client_settings = (pickle.load
2364
(stored_state))
2365
os.remove(stored_state_path)
2366
except IOError as e:
2367
if e.errno == errno.ENOENT:
2368
logger.warning("Could not load persistent state: {0}"
2369
.format(os.strerror(e.errno)))
2370
else:
2371
logger.critical("Could not load persistent state:",
2372
exc_info=e)
2373
raise
2374
except EOFError as e:
2375
logger.warning("Could not load persistent state: "
2376
"EOFError:", exc_info=e)
2377
2378
with PGPEngine() as pgp:
2379
for client_name, client in clients_data.iteritems():
2380
# Decide which value to use after restoring saved state.
2381
# We have three different values: Old config file,
2382
# new config file, and saved state.
2383
# New config value takes precedence if it differs from old
2384
# config value, otherwise use saved state.
2385
for name, value in client_settings[client_name].items():
2386
try:
2387
# For each value in new config, check if it
2388
# differs from the old config value (Except for
2389
# the "secret" attribute)
2390
if (name != "secret" and
2391
value != old_client_settings[client_name]
2392
[name]):
2393
client[name] = value
2394
except KeyError:
2395
pass
2396
2397
# Clients who has passed its expire date can still be
2398
# enabled if its last checker was successful. Clients
2399
# whose checker succeeded before we stored its state is
2400
# assumed to have successfully run all checkers during
2401
# downtime.
2402
if client["enabled"]:
2403
if datetime.datetime.utcnow() >= client["expires"]:
2404
if not client["last_checked_ok"]:
2405
logger.warning(
2406
"disabling client {0} - Client never "
2407
"performed a successful checker"
2408
.format(client_name))
2409
client["enabled"] = False
2410
elif client["last_checker_status"] != 0:
2411
logger.warning(
2412
"disabling client {0} - Client "
2413
"last checker failed with error code {1}"
2414
.format(client_name,
2415
client["last_checker_status"]))
2416
client["enabled"] = False
2417
else:
2418
client["expires"] = (datetime.datetime
2419
.utcnow()
2420
+ client["timeout"])
2421
logger.debug("Last checker succeeded,"
2422
" keeping {0} enabled"
2423
.format(client_name))
1892
2424
try:
1893
yield (name, special_settings[name]())
1894
except KeyError:
1895
yield (name, value)
1896
1897
tcp_server.clients.update(set(
1898
client_class(name = section,
1899
config= dict(client_config_items(
1900
client_config, section)))
1901
for section in client_config.sections()))
2425
client["secret"] = (
2426
pgp.decrypt(client["encrypted_secret"],
2427
client_settings[client_name]
2428
["secret"]))
2429
except PGPError:
2430
# If decryption fails, we use secret from new settings
2431
logger.debug("Failed to decrypt {0} old secret"
2432
.format(client_name))
2433
client["secret"] = (
2434
client_settings[client_name]["secret"])
2435
2436
# Add/remove clients based on new changes made to config
2437
for client_name in (set(old_client_settings)
2438
- set(client_settings)):
2439
del clients_data[client_name]
2440
for client_name in (set(client_settings)
2441
- set(old_client_settings)):
2442
clients_data[client_name] = client_settings[client_name]
2443
2444
# Create all client objects
2445
for client_name, client in clients_data.iteritems():
2446
tcp_server.clients[client_name] = client_class(
2447
name = client_name, settings = client)
2448
1902
2449
if not tcp_server.clients:
1903
2450
logger.warning("No clients defined")
1904
2451
1905
2452
if not debug:
1906
2453
try:
1907
2454
with pidfile:
1915
2462
# "pidfile" was never created
1916
2463
pass
1917
2464
del pidfilename
1918
1919
signal.signal(signal.SIGINT, signal.SIG_IGN)
1920
2465
1921
2466
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1922
2467
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1923
2468
1924
2469
if use_dbus:
1925
class MandosDBusService(dbus.service.Object):
2470
@alternate_dbus_interfaces({"se.recompile.Mandos":
2471
"se.bsnet.fukt.Mandos"})
2472
class MandosDBusService(DBusObjectWithProperties):
1926
2473
"""A D-Bus proxy object"""
1927
2474
def __init__(self):
1928
2475
dbus.service.Object.__init__(self, bus, "/")
1929
_interface = "se.bsnet.fukt.Mandos"
2476
_interface = "se.recompile.Mandos"
2477
2478
@dbus_interface_annotations(_interface)
2479
def _foo(self):
2480
return { "org.freedesktop.DBus.Property"
2481
".EmitsChangedSignal":
2482
"false"}
1930
2483
1931
2484
@dbus.service.signal(_interface, signature="o")
1932
2485
def ClientAdded(self, objpath):
1947
2500
def GetAllClients(self):
1948
2501
"D-Bus method"
1949
2502
return dbus.Array(c.dbus_object_path
1950
for c in tcp_server.clients)
2503
for c in
2504
tcp_server.clients.itervalues())
1951
2505
1952
2506
@dbus.service.method(_interface,
1953
2507
out_signature="a{oa{sv}}")
1955
2509
"D-Bus method"
1956
2510
return dbus.Dictionary(
1957
2511
((c.dbus_object_path, c.GetAll(""))
1958
for c in tcp_server.clients),
2512
for c in tcp_server.clients.itervalues()),
1959
2513
signature="oa{sv}")
1960
2514
1961
2515
@dbus.service.method(_interface, in_signature="o")
1962
2516
def RemoveClient(self, object_path):
1963
2517
"D-Bus method"
1964
for c in tcp_server.clients:
2518
for c in tcp_server.clients.itervalues():
1965
2519
if c.dbus_object_path == object_path:
1966
tcp_server.clients.remove(c)
2520
del tcp_server.clients[c.name]
1967
2521
c.remove_from_connection()
1968
2522
# Don't signal anything except ClientRemoved
1969
2523
c.disable(quiet=True)
1980
2534
"Cleanup function; run on exit"
1981
2535
service.cleanup()
1982
2536
2537
multiprocessing.active_children()
2538
if not (tcp_server.clients or client_settings):
2539
return
2540
2541
# Store client before exiting. Secrets are encrypted with key
2542
# based on what config file has. If config file is
2543
# removed/edited, old secret will thus be unrecovable.
2544
clients = {}
2545
with PGPEngine() as pgp:
2546
for client in tcp_server.clients.itervalues():
2547
key = client_settings[client.name]["secret"]
2548
client.encrypted_secret = pgp.encrypt(client.secret,
2549
key)
2550
client_dict = {}
2551
2552
# A list of attributes that can not be pickled
2553
# + secret.
2554
exclude = set(("bus", "changedstate", "secret",
2555
"checker"))
2556
for name, typ in (inspect.getmembers
2557
(dbus.service.Object)):
2558
exclude.add(name)
2559
2560
client_dict["encrypted_secret"] = (client
2561
.encrypted_secret)
2562
for attr in client.client_structure:
2563
if attr not in exclude:
2564
client_dict[attr] = getattr(client, attr)
2565
2566
clients[client.name] = client_dict
2567
del client_settings[client.name]["secret"]
2568
2569
try:
2570
with (tempfile.NamedTemporaryFile
2571
(mode='wb', suffix=".pickle", prefix='clients-',
2572
dir=os.path.dirname(stored_state_path),
2573
delete=False)) as stored_state:
2574
pickle.dump((clients, client_settings), stored_state)
2575
tempname=stored_state.name
2576
os.rename(tempname, stored_state_path)
2577
except (IOError, OSError) as e:
2578
if not debug:
2579
try:
2580
os.remove(tempname)
2581
except NameError:
2582
pass
2583
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2584
logger.warning("Could not save persistent state: {0}"
2585
.format(os.strerror(e.errno)))
2586
else:
2587
logger.warning("Could not save persistent state:",
2588
exc_info=e)
2589
raise e
2590
2591
# Delete all clients, and settings from config
1983
2592
while tcp_server.clients:
1984
client = tcp_server.clients.pop()
2593
name, client = tcp_server.clients.popitem()
1985
2594
if use_dbus:
1986
2595
client.remove_from_connection()
1987
client.disable_hook = None
1988
2596
# Don't signal anything except ClientRemoved
1989
2597
client.disable(quiet=True)
1990
2598
if use_dbus:
1991
2599
# Emit D-Bus signal
1992
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2600
mandos_dbus_service.ClientRemoved(client
2601
.dbus_object_path,
1993
2602
client.name)
2603
client_settings.clear()
1994
2604
1995
2605
atexit.register(cleanup)
1996
2606
1997
for client in tcp_server.clients:
2607
for client in tcp_server.clients.itervalues():
1998
2608
if use_dbus:
1999
2609
# Emit D-Bus signal
2000
2610
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2001
client.enable()
2611
# Need to initiate checking of clients
2612
if client.enabled:
2613
client.init_checker()
2002
2614
2003
2615
tcp_server.enable()
2004
2616
tcp_server.server_activate()
2007
2619
service.port = tcp_server.socket.getsockname()[1]
2008
2620
if use_ipv6:
2009
2621
logger.info("Now listening on address %r, port %d,"
2010
" flowinfo %d, scope_id %d"
2011
% tcp_server.socket.getsockname())
2622
" flowinfo %d, scope_id %d",
2623
*tcp_server.socket.getsockname())
2012
2624
else: # IPv4
2013
logger.info("Now listening on address %r, port %d"
2014
% tcp_server.socket.getsockname())
2625
logger.info("Now listening on address %r, port %d",
2626
*tcp_server.socket.getsockname())
2015
2627
2016
2628
#service.interface = tcp_server.socket.getsockname()[3]
2017
2629
2019
2631
# From the Avahi example code
2020
2632
try:
2021
2633
service.activate()
2022
except dbus.exceptions.DBusException, error:
2023
logger.critical("DBusException: %s", error)
2634
except dbus.exceptions.DBusException as error:
2635
logger.critical("D-Bus Exception", exc_info=error)
2024
2636
cleanup()
2025
2637
sys.exit(1)
2026
2638
# End of Avahi example code
2032
2644
2033
2645
logger.debug("Starting main loop")
2034
2646
main_loop.run()
2035
except AvahiError, error:
2036
logger.critical("AvahiError: %s", error)
2647
except AvahiError as error:
2648
logger.critical("Avahi Error", exc_info=error)
2037
2649
cleanup()
2038
2650
sys.exit(1)
2039
2651
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0