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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/source/local-options
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
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13
# Everything else is
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
14
# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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16
#
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# This program is free software: you can redistribute it and/or modify
18
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/>.
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#
31
# Contact the authors at <mandos@recompile.se>.
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
#
33
33
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
from future_builtins import *
38
39
37
import SocketServer as socketserver
40
38
import socket
41
39
import argparse
64
62
import functools
65
63
import cPickle as pickle
66
64
import multiprocessing
67
import types
68
import binascii
69
import tempfile
70
import itertools
71
65
72
66
import dbus
73
67
import dbus.service
78
72
import ctypes.util
79
73
import xml.dom.minidom
80
74
import inspect
81
import GnuPGInterface
82
75
83
76
try:
84
77
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
88
81
except ImportError:
89
82
SO_BINDTODEVICE = None
90
83
91
version = "1.5.3"
92
stored_state_file = "clients.pickle"
93
94
logger = logging.getLogger()
84
85
version = "1.3.0"
86
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
95
89
syslogger = (logging.handlers.SysLogHandler
96
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
97
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.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
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)
213
102
214
103
class AvahiError(Exception):
215
104
def __init__(self, value, *args, **kwargs):
245
134
server: D-Bus Server
246
135
bus: dbus.SystemBus()
247
136
"""
248
249
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
250
138
servicetype = None, port = None, TXT = None,
251
139
domain = "", host = "", max_renames = 32768,
264
152
self.server = None
265
153
self.bus = bus
266
154
self.entry_group_state_changed_match = None
267
268
155
def rename(self):
269
156
"""Derived from the Avahi example code"""
270
157
if self.rename_count >= self.max_renames:
272
159
" after %i retries, exiting.",
273
160
self.rename_count)
274
161
raise AvahiServiceError("Too many renames")
275
self.name = unicode(self.server
276
.GetAlternativeServiceName(self.name))
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
277
163
logger.info("Changing Zeroconf service name to %r ...",
278
164
self.name)
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
279
169
self.remove()
280
170
try:
281
171
self.add()
282
172
except dbus.exceptions.DBusException as error:
283
logger.critical("D-Bus Exception", exc_info=error)
173
logger.critical("DBusException: %s", error)
284
174
self.cleanup()
285
175
os._exit(1)
286
176
self.rename_count += 1
287
288
177
def remove(self):
289
178
"""Derived from the Avahi example code"""
290
179
if self.entry_group_state_changed_match is not None:
292
181
self.entry_group_state_changed_match = None
293
182
if self.group is not None:
294
183
self.group.Reset()
295
296
184
def add(self):
297
185
"""Derived from the Avahi example code"""
298
186
self.remove()
303
191
avahi.DBUS_INTERFACE_ENTRY_GROUP)
304
192
self.entry_group_state_changed_match = (
305
193
self.group.connect_to_signal(
306
'StateChanged', self.entry_group_state_changed))
194
'StateChanged', self .entry_group_state_changed))
307
195
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
308
196
self.name, self.type)
309
197
self.group.AddService(
315
203
dbus.UInt16(self.port),
316
204
avahi.string_array_to_txt_array(self.TXT))
317
205
self.group.Commit()
318
319
206
def entry_group_state_changed(self, state, error):
320
207
"""Derived from the Avahi example code"""
321
208
logger.debug("Avahi entry group state change: %i", state)
328
215
elif state == avahi.ENTRY_GROUP_FAILURE:
329
216
logger.critical("Avahi: Error in group state changed %s",
330
217
unicode(error))
331
raise AvahiGroupError("State changed: {0!s}"
332
.format(error))
333
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
334
220
def cleanup(self):
335
221
"""Derived from the Avahi example code"""
336
222
if self.group is not None:
337
223
try:
338
224
self.group.Free()
339
225
except (dbus.exceptions.UnknownMethodException,
340
dbus.exceptions.DBusException):
226
dbus.exceptions.DBusException) as e:
341
227
pass
342
228
self.group = None
343
229
self.remove()
344
345
230
def server_state_changed(self, state, error=None):
346
231
"""Derived from the Avahi example code"""
347
232
logger.debug("Avahi server state change: %i", state)
366
251
logger.debug("Unknown state: %r", state)
367
252
else:
368
253
logger.debug("Unknown state: %r: %r", state, error)
369
370
254
def activate(self):
371
255
"""Derived from the Avahi example code"""
372
256
if self.server is None:
380
264
self.server_state_changed(self.server.GetState())
381
265
382
266
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
401
267
class Client(object):
402
268
"""A representation of a client host served by this server.
403
269
404
270
Attributes:
405
approved: bool(); 'None' if not yet approved/disapproved
271
_approved: bool(); 'None' if not yet approved/disapproved
406
272
approval_delay: datetime.timedelta(); Time to wait for approval
407
273
approval_duration: datetime.timedelta(); Duration of one approval
408
274
checker: subprocess.Popen(); a running checker process used
415
281
instance %(name)s can be used in the command.
416
282
checker_initiator_tag: a gobject event source tag, or None
417
283
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
420
284
current_checker_command: string; current running checker_command
285
disable_hook: If set, called by disable() as disable_hook(self)
421
286
disable_initiator_tag: a gobject event source tag, or None
422
287
enabled: bool()
423
288
fingerprint: string (40 or 32 hexadecimal digits); used to
426
291
interval: datetime.timedelta(); How often to start a new checker
427
292
last_approval_request: datetime.datetime(); (UTC) or None
428
293
last_checked_ok: datetime.datetime(); (UTC) or None
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
294
last_enabled: datetime.datetime(); (UTC)
433
295
name: string; from the config file, used in log messages and
434
296
D-Bus identifiers
435
297
secret: bytestring; sent verbatim (over TLS) to client
436
298
timeout: datetime.timedelta(); How long from last_checked_ok
437
299
until this client is disabled
438
extended_timeout: extra long timeout when secret has been sent
439
300
runtime_expansions: Allowed attributes for runtime expansion.
440
expires: datetime.datetime(); time (UTC) when a client will be
441
disabled, or None
442
301
"""
443
302
444
303
runtime_expansions = ("approval_delay", "approval_duration",
445
"created", "enabled", "expires",
446
"fingerprint", "host", "interval",
447
"last_approval_request", "last_checked_ok",
304
"created", "enabled", "fingerprint",
305
"host", "interval", "last_checked_ok",
448
306
"last_enabled", "name", "timeout")
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
}
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))
459
314
460
315
def timeout_milliseconds(self):
461
316
"Return the 'timeout' attribute in milliseconds"
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)
317
return self._timedelta_to_milliseconds(self.timeout)
467
318
468
319
def interval_milliseconds(self):
469
320
"Return the 'interval' attribute in milliseconds"
470
return timedelta_to_milliseconds(self.interval)
471
321
return self._timedelta_to_milliseconds(self.interval)
322
472
323
def approval_delay_milliseconds(self):
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):
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."""
523
330
self.name = name
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
331
if config is None:
332
config = {}
538
333
logger.debug("Creating client %r", self.name)
539
334
# Uppercase and remove spaces from fingerprint for later
540
335
# comparison purposes with return value from the fingerprint()
541
336
# function
337
self.fingerprint = (config["fingerprint"].upper()
338
.replace(" ", ""))
542
339
logger.debug(" Fingerprint: %s", self.fingerprint)
543
self.created = settings.get("created",
544
datetime.datetime.utcnow())
545
546
# 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
547
359
self.checker = None
548
360
self.checker_initiator_tag = None
549
361
self.disable_initiator_tag = None
550
362
self.checker_callback_tag = None
363
self.checker_command = config["checker"]
551
364
self.current_checker_command = None
552
self.approved = None
365
self.last_connect = None
366
self._approved = None
367
self.approved_by_default = config.get("approved_by_default",
368
True)
553
369
self.approvals_pending = 0
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)
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())
568
375
569
# Send notice to process children that client state has changed
570
376
def send_changedstate(self):
571
with self.changedstate:
572
self.changedstate.notify_all()
573
377
self.changedstate.acquire()
378
self.changedstate.notify_all()
379
self.changedstate.release()
380
574
381
def enable(self):
575
382
"""Start this client's checker and timeout hooks"""
576
383
if getattr(self, "enabled", False):
577
384
# Already enabled
578
385
return
579
self.expires = datetime.datetime.utcnow() + self.timeout
580
self.enabled = True
386
self.send_changedstate()
581
387
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):
609
388
# Schedule a new checker to be started an 'interval' from now,
610
389
# and every interval from then on.
611
if self.checker_initiator_tag is not None:
612
gobject.source_remove(self.checker_initiator_tag)
613
390
self.checker_initiator_tag = (gobject.timeout_add
614
391
(self.interval_milliseconds(),
615
392
self.start_checker))
616
393
# Schedule a disable() when 'timeout' has passed
617
if self.disable_initiator_tag is not None:
618
gobject.source_remove(self.disable_initiator_tag)
619
394
self.disable_initiator_tag = (gobject.timeout_add
620
395
(self.timeout_milliseconds(),
621
396
self.disable))
397
self.enabled = True
622
398
# Also start a new checker *right now*.
623
399
self.start_checker()
624
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
625
426
def checker_callback(self, pid, condition, command):
626
427
"""The checker has completed, so take appropriate actions."""
627
428
self.checker_callback_tag = None
628
429
self.checker = None
629
430
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
631
if self.last_checker_status == 0:
431
exitstatus = os.WEXITSTATUS(condition)
432
if exitstatus == 0:
632
433
logger.info("Checker for %(name)s succeeded",
633
434
vars(self))
634
435
self.checked_ok()
636
437
logger.info("Checker for %(name)s failed",
637
438
vars(self))
638
439
else:
639
self.last_checker_status = -1
640
440
logger.warning("Checker for %(name)s crashed?",
641
441
vars(self))
642
442
643
443
def checked_ok(self):
644
"""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
"""
645
449
self.last_checked_ok = datetime.datetime.utcnow()
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
450
gobject.source_remove(self.disable_initiator_tag)
451
self.disable_initiator_tag = (gobject.timeout_add
452
(self.timeout_milliseconds(),
453
self.disable))
661
454
662
455
def need_approval(self):
663
456
self.last_approval_request = datetime.datetime.utcnow()
668
461
If a checker already exists, leave it running and do
669
462
nothing."""
670
463
# The reason for not killing a running checker is that if we
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
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
675
468
# checkers alone, the checker would have to take more time
676
469
# than 'timeout' for the client to be disabled, which is as it
677
470
# should be.
691
484
self.current_checker_command)
692
485
# Start a new checker if needed
693
486
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)
699
487
try:
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
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
705
506
self.current_checker_command = command
706
507
try:
707
508
logger.info("Starting checker %r for %s",
713
514
self.checker = subprocess.Popen(command,
714
515
close_fds=True,
715
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.
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)
716
527
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)
528
logger.error("Failed to start subprocess: %s",
529
error)
729
530
# Re-run this periodically if run by gobject.timeout_add
730
531
return True
731
532
738
539
return
739
540
logger.debug("Stopping checker for %(name)s", vars(self))
740
541
try:
741
self.checker.terminate()
542
os.kill(self.checker.pid, signal.SIGTERM)
742
543
#time.sleep(0.5)
743
544
#if self.checker.poll() is None:
744
# self.checker.kill()
545
# os.kill(self.checker.pid, signal.SIGKILL)
745
546
except OSError as error:
746
547
if error.errno != errno.ESRCH: # No such process
747
548
raise
748
549
self.checker = None
749
550
750
751
551
def dbus_service_property(dbus_interface, signature="v",
752
552
access="readwrite", byte_arrays=False):
753
553
"""Decorators for marking methods of a DBusObjectWithProperties to
764
564
# "Set" method, so we fail early here:
765
565
if byte_arrays and signature != "ay":
766
566
raise ValueError("Byte arrays not supported for non-'ay'"
767
" signature {0!r}".format(signature))
567
" signature %r" % signature)
768
568
def decorator(func):
769
569
func._dbus_is_property = True
770
570
func._dbus_interface = dbus_interface
778
578
return decorator
779
579
780
580
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
818
581
class DBusPropertyException(dbus.exceptions.DBusException):
819
582
"""A base class for D-Bus property-related exceptions
820
583
"""
836
599
837
600
class DBusObjectWithProperties(dbus.service.Object):
838
601
"""A D-Bus object with properties.
839
602
840
603
Classes inheriting from this can use the dbus_service_property
841
604
decorator to expose methods as D-Bus properties. It exposes the
842
605
standard Get(), Set(), and GetAll() methods on the D-Bus.
843
606
"""
844
607
845
608
@staticmethod
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)
609
def _is_dbus_property(obj):
610
return getattr(obj, "_dbus_is_property", False)
854
611
855
def _get_all_dbus_things(self, thing):
612
def _get_all_dbus_properties(self):
856
613
"""Returns a generator of (name, attribute) pairs
857
614
"""
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)))
615
return ((prop._dbus_name, prop)
616
for name, prop in
617
inspect.getmembers(self, self._is_dbus_property))
865
618
866
619
def _get_dbus_property(self, interface_name, property_name):
867
620
"""Returns a bound method if one exists which is a D-Bus
868
621
property with the specified name and interface.
869
622
"""
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
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
878
633
# No such property
879
634
raise DBusPropertyNotFound(self.dbus_object_path + ":"
880
635
+ interface_name + "."
905
660
# signatures other than "ay".
906
661
if prop._dbus_signature != "ay":
907
662
raise ValueError
908
value = dbus.ByteArray(b''.join(chr(byte)
909
for byte in value))
663
value = dbus.ByteArray(''.join(unichr(byte)
664
for byte in value))
910
665
prop(value)
911
666
912
667
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
914
669
def GetAll(self, interface_name):
915
670
"""Standard D-Bus property GetAll() method, see D-Bus
916
671
standard.
917
672
918
673
Note: Will not include properties with access="write".
919
674
"""
920
properties = {}
921
for name, prop in self._get_all_dbus_things("property"):
675
all = {}
676
for name, prop in self._get_all_dbus_properties():
922
677
if (interface_name
923
678
and interface_name != prop._dbus_interface):
924
679
# Interface non-empty but did not match
928
683
continue
929
684
value = prop()
930
685
if not hasattr(value, "variant_level"):
931
properties[name] = value
686
all[name] = value
932
687
continue
933
properties[name] = type(value)(value, variant_level=
934
value.variant_level+1)
935
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")
936
691
937
692
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
938
693
out_signature="s",
939
694
path_keyword='object_path',
940
695
connection_keyword='connection')
941
696
def Introspect(self, object_path, connection):
942
"""Overloading of standard D-Bus method.
943
944
Inserts property tags and interface annotation tags.
697
"""Standard D-Bus method, overloaded to insert property tags.
945
698
"""
946
699
xmlstring = dbus.service.Object.Introspect(self, object_path,
947
700
connection)
954
707
e.setAttribute("access", prop._dbus_access)
955
708
return e
956
709
for if_tag in document.getElementsByTagName("interface"):
957
# Add property tags
958
710
for tag in (make_tag(document, name, prop)
959
711
for name, prop
960
in self._get_all_dbus_things("property")
712
in self._get_all_dbus_properties()
961
713
if prop._dbus_interface
962
714
== if_tag.getAttribute("name")):
963
715
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)
995
716
# Add the names to the return values for the
996
717
# "org.freedesktop.DBus.Properties" methods
997
718
if (if_tag.getAttribute("name")
1012
733
except (AttributeError, xml.dom.DOMException,
1013
734
xml.parsers.expat.ExpatError) as error:
1014
735
logger.error("Failed to override Introspection method",
1015
exc_info=error)
736
error)
1016
737
return xmlstring
1017
738
1018
739
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"})
1198
740
class ClientDBus(Client, DBusObjectWithProperties):
1199
741
"""A Client class using D-Bus
1200
742
1209
751
# dbus.service.Object doesn't use super(), so we can't either.
1210
752
1211
753
def __init__(self, bus = None, *args, **kwargs):
754
self._approvals_pending = 0
1212
755
self.bus = bus
1213
756
Client.__init__(self, *args, **kwargs)
1214
757
# Only now, when this client is initialized, can it show up on
1220
763
("/clients/" + client_object_name))
1221
764
DBusObjectWithProperties.__init__(self, self.bus,
1222
765
self.dbus_object_path)
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
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
1291
810
1292
811
def __del__(self, *args, **kwargs):
1293
812
try:
1302
821
*args, **kwargs):
1303
822
self.checker_callback_tag = None
1304
823
self.checker = None
824
# Emit D-Bus signal
825
self.PropertyChanged(dbus.String("CheckerRunning"),
826
dbus.Boolean(False, variant_level=1))
1305
827
if os.WIFEXITED(condition):
1306
828
exitstatus = os.WEXITSTATUS(condition)
1307
829
# Emit D-Bus signal
1317
839
return Client.checker_callback(self, pid, condition, command,
1318
840
*args, **kwargs)
1319
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
1320
859
def start_checker(self, *args, **kwargs):
1321
860
old_checker = self.checker
1322
861
if self.checker is not None:
1329
868
and old_checker_pid != self.checker.pid):
1330
869
# Emit D-Bus signal
1331
870
self.CheckerStarted(self.current_checker_command)
871
self.PropertyChanged(
872
dbus.String("CheckerRunning"),
873
dbus.Boolean(True, variant_level=1))
1332
874
return r
1333
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
1334
885
def _reset_approved(self):
1335
self.approved = None
886
self._approved = None
1336
887
return False
1337
888
1338
889
def approve(self, value=True):
1339
self.approved = value
1340
gobject.timeout_add(timedelta_to_milliseconds
890
self.send_changedstate()
891
self._approved = value
892
gobject.timeout_add(self._timedelta_to_milliseconds
1341
893
(self.approval_duration),
1342
894
self._reset_approved)
1343
self.send_changedstate()
895
1344
896
1345
897
## D-Bus methods, signals & properties
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"}
898
_interface = "se.bsnet.fukt.Mandos.Client"
1354
899
1355
900
## Signals
1356
901
1442
987
if value is None: # get
1443
988
return dbus.Boolean(self.approved_by_default)
1444
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))
1445
993
1446
994
# ApprovalDelay - property
1447
995
@dbus_service_property(_interface, signature="t",
1450
998
if value is None: # get
1451
999
return dbus.UInt64(self.approval_delay_milliseconds())
1452
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))
1453
1004
1454
1005
# ApprovalDuration - property
1455
1006
@dbus_service_property(_interface, signature="t",
1456
1007
access="readwrite")
1457
1008
def ApprovalDuration_dbus_property(self, value=None):
1458
1009
if value is None: # get
1459
return dbus.UInt64(timedelta_to_milliseconds(
1010
return dbus.UInt64(self._timedelta_to_milliseconds(
1460
1011
self.approval_duration))
1461
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))
1462
1016
1463
1017
# Name - property
1464
1018
@dbus_service_property(_interface, signature="s", access="read")
1476
1030
def Host_dbus_property(self, value=None):
1477
1031
if value is None: # get
1478
1032
return dbus.String(self.host)
1479
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))
1480
1037
1481
1038
# Created - property
1482
1039
@dbus_service_property(_interface, signature="s", access="read")
1483
1040
def Created_dbus_property(self):
1484
return datetime_to_dbus(self.created)
1041
return dbus.String(self._datetime_to_dbus(self.created))
1485
1042
1486
1043
# LastEnabled - property
1487
1044
@dbus_service_property(_interface, signature="s", access="read")
1488
1045
def LastEnabled_dbus_property(self):
1489
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))
1490
1049
1491
1050
# Enabled - property
1492
1051
@dbus_service_property(_interface, signature="b",
1506
1065
if value is not None:
1507
1066
self.checked_ok()
1508
1067
return
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)
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))
1521
1072
1522
1073
# LastApprovalRequest - property
1523
1074
@dbus_service_property(_interface, signature="s", access="read")
1524
1075
def LastApprovalRequest_dbus_property(self):
1525
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))
1526
1081
1527
1082
# Timeout - property
1528
1083
@dbus_service_property(_interface, signature="t",
1530
1085
def Timeout_dbus_property(self, value=None):
1531
1086
if value is None: # get
1532
1087
return dbus.UInt64(self.timeout_milliseconds())
1533
old_timeout = self.timeout
1534
1088
self.timeout = datetime.timedelta(0, 0, 0, value)
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)
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))
1559
1109
1560
1110
# Interval - property
1561
1111
@dbus_service_property(_interface, signature="t",
1564
1114
if value is None: # get
1565
1115
return dbus.UInt64(self.interval_milliseconds())
1566
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))
1567
1120
if getattr(self, "checker_initiator_tag", None) is None:
1568
1121
return
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
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
1576
1128
# Checker - property
1577
1129
@dbus_service_property(_interface, signature="s",
1578
1130
access="readwrite")
1579
1131
def Checker_dbus_property(self, value=None):
1580
1132
if value is None: # get
1581
1133
return dbus.String(self.checker_command)
1582
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))
1583
1139
1584
1140
# CheckerRunning - property
1585
1141
@dbus_service_property(_interface, signature="b",
1612
1168
self._pipe.send(('init', fpr, address))
1613
1169
if not self._pipe.recv():
1614
1170
raise KeyError()
1615
1171
1616
1172
def __getattribute__(self, name):
1617
if name == '_pipe':
1173
if(name == '_pipe'):
1618
1174
return super(ProxyClient, self).__getattribute__(name)
1619
1175
self._pipe.send(('getattr', name))
1620
1176
data = self._pipe.recv()
1625
1181
self._pipe.send(('funcall', name, args, kwargs))
1626
1182
return self._pipe.recv()[1]
1627
1183
return func
1628
1184
1629
1185
def __setattr__(self, name, value):
1630
if name == '_pipe':
1186
if(name == '_pipe'):
1631
1187
return super(ProxyClient, self).__setattr__(name, value)
1632
1188
self._pipe.send(('setattr', name, value))
1633
1189
1644
1200
unicode(self.client_address))
1645
1201
logger.debug("Pipe FD: %d",
1646
1202
self.server.child_pipe.fileno())
1647
1203
1648
1204
session = (gnutls.connection
1649
1205
.ClientSession(self.request,
1650
1206
gnutls.connection
1651
1207
.X509Credentials()))
1652
1208
1653
1209
# Note: gnutls.connection.X509Credentials is really a
1654
1210
# generic GnuTLS certificate credentials object so long as
1655
1211
# no X.509 keys are added to it. Therefore, we can use it
1656
1212
# here despite using OpenPGP certificates.
1657
1213
1658
1214
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1659
1215
# "+AES-256-CBC", "+SHA1",
1660
1216
# "+COMP-NULL", "+CTYPE-OPENPGP",
1666
1222
(gnutls.library.functions
1667
1223
.gnutls_priority_set_direct(session._c_object,
1668
1224
priority, None))
1669
1225
1670
1226
# Start communication using the Mandos protocol
1671
1227
# Get protocol number
1672
1228
line = self.request.makefile().readline()
1677
1233
except (ValueError, IndexError, RuntimeError) as error:
1678
1234
logger.error("Unknown protocol version: %s", error)
1679
1235
return
1680
1236
1681
1237
# Start GnuTLS connection
1682
1238
try:
1683
1239
session.handshake()
1687
1243
# established. Just abandon the request.
1688
1244
return
1689
1245
logger.debug("Handshake succeeded")
1690
1246
1691
1247
approval_required = False
1692
1248
try:
1693
1249
try:
1698
1254
logger.warning("Bad certificate: %s", error)
1699
1255
return
1700
1256
logger.debug("Fingerprint: %s", fpr)
1701
1257
1702
1258
try:
1703
1259
client = ProxyClient(child_pipe, fpr,
1704
1260
self.client_address)
1716
1272
client.name)
1717
1273
if self.server.use_dbus:
1718
1274
# Emit D-Bus signal
1719
client.Rejected("Disabled")
1275
client.Rejected("Disabled")
1720
1276
return
1721
1277
1722
if client.approved or not client.approval_delay:
1278
if client._approved or not client.approval_delay:
1723
1279
#We are approved or approval is disabled
1724
1280
break
1725
elif client.approved is None:
1281
elif client._approved is None:
1726
1282
logger.info("Client %s needs approval",
1727
1283
client.name)
1728
1284
if self.server.use_dbus:
1739
1295
return
1740
1296
1741
1297
#wait until timeout or approved
1298
#x = float(client._timedelta_to_milliseconds(delay))
1742
1299
time = datetime.datetime.now()
1743
1300
client.changedstate.acquire()
1744
client.changedstate.wait(
1745
float(timedelta_to_milliseconds(delay)
1746
/ 1000))
1301
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1747
1302
client.changedstate.release()
1748
1303
time2 = datetime.datetime.now()
1749
1304
if (time2 - time) >= delay:
1765
1320
try:
1766
1321
sent = session.send(client.secret[sent_size:])
1767
1322
except gnutls.errors.GNUTLSError as error:
1768
logger.warning("gnutls send failed",
1769
exc_info=error)
1323
logger.warning("gnutls send failed")
1770
1324
return
1771
1325
logger.debug("Sent: %d, remaining: %d",
1772
1326
sent, len(client.secret)
1773
1327
- (sent_size + sent))
1774
1328
sent_size += sent
1775
1329
1776
1330
logger.info("Sending secret to %s", client.name)
1777
# bump the timeout using extended_timeout
1778
client.bump_timeout(client.extended_timeout)
1331
# bump the timeout as if seen
1332
client.checked_ok()
1779
1333
if self.server.use_dbus:
1780
1334
# Emit D-Bus signal
1781
1335
client.GotSecret()
1786
1340
try:
1787
1341
session.bye()
1788
1342
except gnutls.errors.GNUTLSError as error:
1789
logger.warning("GnuTLS bye failed",
1790
exc_info=error)
1343
logger.warning("GnuTLS bye failed")
1791
1344
1792
1345
@staticmethod
1793
1346
def peer_certificate(session):
1849
1402
# Convert the buffer to a Python bytestring
1850
1403
fpr = ctypes.string_at(buf, buf_len.value)
1851
1404
# Convert the bytestring to hexadecimal notation
1852
hex_fpr = binascii.hexlify(fpr).upper()
1405
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1853
1406
return hex_fpr
1854
1407
1855
1408
1858
1411
def sub_process_main(self, request, address):
1859
1412
try:
1860
1413
self.finish_request(request, address)
1861
except Exception:
1414
except:
1862
1415
self.handle_error(request, address)
1863
1416
self.close_request(request)
1864
1417
1865
1418
def process_request(self, request, address):
1866
1419
"""Start a new process to process the request."""
1867
proc = multiprocessing.Process(target = self.sub_process_main,
1868
args = (request, address))
1869
proc.start()
1870
return proc
1871
1420
multiprocessing.Process(target = self.sub_process_main,
1421
args = (request, address)).start()
1872
1422
1873
1423
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1874
1424
""" adds a pipe to the MixIn """
1878
1428
This function creates a new pipe in self.pipe
1879
1429
"""
1880
1430
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1881
1882
proc = MultiprocessingMixIn.process_request(self, request,
1883
client_address)
1431
1432
super(MultiprocessingMixInWithPipe,
1433
self).process_request(request, client_address)
1884
1434
self.child_pipe.close()
1885
self.add_pipe(parent_pipe, proc)
1886
1887
def add_pipe(self, parent_pipe, proc):
1435
self.add_pipe(parent_pipe)
1436
1437
def add_pipe(self, parent_pipe):
1888
1438
"""Dummy function; override as necessary"""
1889
1439
raise NotImplementedError
1890
1440
1891
1892
1441
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1893
1442
socketserver.TCPServer, object):
1894
1443
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1921
1470
str(self.interface
1922
1471
+ '\0'))
1923
1472
except socket.error as error:
1924
if error.errno == errno.EPERM:
1473
if error[0] == errno.EPERM:
1925
1474
logger.error("No permission to"
1926
1475
" bind to interface %s",
1927
1476
self.interface)
1928
elif error.errno == errno.ENOPROTOOPT:
1477
elif error[0] == errno.ENOPROTOOPT:
1929
1478
logger.error("SO_BINDTODEVICE not available;"
1930
1479
" cannot bind to interface %s",
1931
1480
self.interface)
1932
elif error.errno == errno.ENODEV:
1933
logger.error("Interface %s does not"
1934
" exist, cannot bind",
1935
self.interface)
1936
1481
else:
1937
1482
raise
1938
1483
# Only bind(2) the socket if we really need to.
1972
1517
self.enabled = False
1973
1518
self.clients = clients
1974
1519
if self.clients is None:
1975
self.clients = {}
1520
self.clients = set()
1976
1521
self.use_dbus = use_dbus
1977
1522
self.gnutls_priority = gnutls_priority
1978
1523
IPv6_TCPServer.__init__(self, server_address,
1982
1527
def server_activate(self):
1983
1528
if self.enabled:
1984
1529
return socketserver.TCPServer.server_activate(self)
1985
1986
1530
def enable(self):
1987
1531
self.enabled = True
1988
1989
def add_pipe(self, parent_pipe, proc):
1532
def add_pipe(self, parent_pipe):
1990
1533
# Call "handle_ipc" for both data and EOF events
1991
1534
gobject.io_add_watch(parent_pipe.fileno(),
1992
1535
gobject.IO_IN | gobject.IO_HUP,
1993
1536
functools.partial(self.handle_ipc,
1994
parent_pipe =
1995
parent_pipe,
1996
proc = proc))
1997
1537
parent_pipe = parent_pipe))
1538
1998
1539
def handle_ipc(self, source, condition, parent_pipe=None,
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()
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):
2004
1557
return False
2005
1558
2006
1559
# Read a request from the child
2011
1564
fpr = request[1]
2012
1565
address = request[2]
2013
1566
2014
for c in self.clients.itervalues():
1567
for c in self.clients:
2015
1568
if c.fingerprint == fpr:
2016
1569
client = c
2017
1570
break
2020
1573
"dress: %s", fpr, address)
2021
1574
if self.use_dbus:
2022
1575
# Emit D-Bus signal
2023
mandos_dbus_service.ClientNotFound(fpr,
2024
address[0])
1576
mandos_dbus_service.ClientNotFound(fpr, address[0])
2025
1577
parent_pipe.send(False)
2026
1578
return False
2027
1579
2028
1580
gobject.io_add_watch(parent_pipe.fileno(),
2029
1581
gobject.IO_IN | gobject.IO_HUP,
2030
1582
functools.partial(self.handle_ipc,
2031
parent_pipe =
2032
parent_pipe,
2033
proc = proc,
2034
client_object =
2035
client))
1583
parent_pipe = parent_pipe,
1584
client_object = client))
2036
1585
parent_pipe.send(True)
2037
# remove the old hook in favor of the new above hook on
2038
# same fileno
1586
# remove the old hook in favor of the new above hook on same fileno
2039
1587
return False
2040
1588
if command == 'funcall':
2041
1589
funcname = request[1]
2042
1590
args = request[2]
2043
1591
kwargs = request[3]
2044
1592
2045
parent_pipe.send(('data', getattr(client_object,
2046
funcname)(*args,
2047
**kwargs)))
2048
1593
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1594
2049
1595
if command == 'getattr':
2050
1596
attrname = request[1]
2051
1597
if callable(client_object.__getattribute__(attrname)):
2052
1598
parent_pipe.send(('function',))
2053
1599
else:
2054
parent_pipe.send(('data', client_object
2055
.__getattribute__(attrname)))
1600
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2056
1601
2057
1602
if command == 'setattr':
2058
1603
attrname = request[1]
2059
1604
value = request[2]
2060
1605
setattr(client_object, attrname, value)
2061
1606
2062
1607
return True
2063
1608
2064
1609
2094
1639
elif suffix == "w":
2095
1640
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2096
1641
else:
2097
raise ValueError("Unknown suffix {0!r}"
2098
.format(suffix))
1642
raise ValueError("Unknown suffix %r" % suffix)
2099
1643
except (ValueError, IndexError) as e:
2100
1644
raise ValueError(*(e.args))
2101
1645
timevalue += delta
2102
1646
return timevalue
2103
1647
2104
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
2105
1673
def daemon(nochdir = False, noclose = False):
2106
1674
"""See daemon(3). Standard BSD Unix function.
2107
1675
2115
1683
sys.exit()
2116
1684
if not noclose:
2117
1685
# Close all standard open file descriptors
2118
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1686
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2119
1687
if not stat.S_ISCHR(os.fstat(null).st_mode):
2120
1688
raise OSError(errno.ENODEV,
2121
"{0} not a character device"
2122
.format(os.devnull))
1689
"%s not a character device"
1690
% os.path.devnull)
2123
1691
os.dup2(null, sys.stdin.fileno())
2124
1692
os.dup2(null, sys.stdout.fileno())
2125
1693
os.dup2(null, sys.stderr.fileno())
2134
1702
2135
1703
parser = argparse.ArgumentParser()
2136
1704
parser.add_argument("-v", "--version", action="version",
2137
version = "%(prog)s {0}".format(version),
1705
version = "%%(prog)s %s" % version,
2138
1706
help="show version number and exit")
2139
1707
parser.add_argument("-i", "--interface", metavar="IF",
2140
1708
help="Bind to interface IF")
2162
1730
" system bus interface")
2163
1731
parser.add_argument("--no-ipv6", action="store_false",
2164
1732
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
1733
options = parser.parse_args()
2172
1734
2173
1735
if options.check:
2186
1748
"use_dbus": "True",
2187
1749
"use_ipv6": "True",
2188
1750
"debuglevel": "",
2189
"restore": "True",
2190
"statedir": "/var/lib/mandos"
2191
1751
}
2192
1752
2193
1753
# Parse config file for server-global settings
2210
1770
# options, if set.
2211
1771
for option in ("interface", "address", "port", "debug",
2212
1772
"priority", "servicename", "configdir",
2213
"use_dbus", "use_ipv6", "debuglevel", "restore",
2214
"statedir"):
1773
"use_dbus", "use_ipv6", "debuglevel"):
2215
1774
value = getattr(options, option)
2216
1775
if value is not None:
2217
1776
server_settings[option] = value
2229
1788
debuglevel = server_settings["debuglevel"]
2230
1789
use_dbus = server_settings["use_dbus"]
2231
1790
use_ipv6 = server_settings["use_ipv6"]
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
1791
2244
1792
if server_settings["servicename"] != "Mandos":
2245
1793
syslogger.setFormatter(logging.Formatter
2246
('Mandos ({0}) [%(process)d]:'
2247
' %(levelname)s: %(message)s'
2248
.format(server_settings
2249
["servicename"])))
1794
('Mandos (%s) [%%(process)d]:'
1795
' %%(levelname)s: %%(message)s'
1796
% server_settings["servicename"]))
2250
1797
2251
1798
# Parse config file with clients
2252
client_config = configparser.SafeConfigParser(Client
2253
.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)
2254
1807
client_config.read(os.path.join(server_settings["configdir"],
2255
1808
"clients.conf"))
2256
1809
2270
1823
pidfilename = "/var/run/mandos.pid"
2271
1824
try:
2272
1825
pidfile = open(pidfilename, "w")
2273
except IOError as e:
2274
logger.error("Could not open file %r", pidfilename,
2275
exc_info=e)
1826
except IOError:
1827
logger.error("Could not open file %r", pidfilename)
2276
1828
2277
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:
2278
1833
try:
2279
uid = pwd.getpwnam(name).pw_uid
2280
gid = pwd.getpwnam(name).pw_gid
2281
break
1834
uid = pwd.getpwnam("mandos").pw_uid
1835
gid = pwd.getpwnam("mandos").pw_gid
2282
1836
except KeyError:
2283
continue
2284
else:
2285
uid = 65534
2286
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
2287
1843
try:
2288
1844
os.setgid(gid)
2289
1845
os.setuid(uid)
2290
1846
except OSError as error:
2291
if error.errno != errno.EPERM:
1847
if error[0] != errno.EPERM:
2292
1848
raise error
2293
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
2294
1858
if debug:
2295
1859
# Enable all possible GnuTLS debugging
2296
1860
2306
1870
.gnutls_global_set_log_function(debug_gnutls))
2307
1871
2308
1872
# Redirect stdin so all checkers get /dev/null
2309
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1873
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2310
1874
os.dup2(null, sys.stdin.fileno())
2311
1875
if null > 2:
2312
1876
os.close(null)
1877
else:
1878
# No console logging
1879
logger.removeHandler(console)
2313
1880
2314
1881
# Need to fork before connecting to D-Bus
2315
1882
if not debug:
2316
1883
# Close all input and output, do double fork, etc.
2317
1884
daemon()
2318
1885
2319
gobject.threads_init()
2320
2321
1886
global main_loop
2322
1887
# From the Avahi example code
2323
DBusGMainLoop(set_as_default=True)
1888
DBusGMainLoop(set_as_default=True )
2324
1889
main_loop = gobject.MainLoop()
2325
1890
bus = dbus.SystemBus()
2326
1891
# End of Avahi example code
2327
1892
if use_dbus:
2328
1893
try:
2329
bus_name = dbus.service.BusName("se.recompile.Mandos",
1894
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2330
1895
bus, do_not_queue=True)
2331
old_bus_name = (dbus.service.BusName
2332
("se.bsnet.fukt.Mandos", bus,
2333
do_not_queue=True))
2334
1896
except dbus.exceptions.NameExistsException as e:
2335
logger.error("Disabling D-Bus:", exc_info=e)
1897
logger.error(unicode(e) + ", disabling D-Bus")
2336
1898
use_dbus = False
2337
1899
server_settings["use_dbus"] = False
2338
1900
tcp_server.use_dbus = False
2339
1901
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2340
service = AvahiServiceToSyslog(name =
2341
server_settings["servicename"],
2342
servicetype = "_mandos._tcp",
2343
protocol = protocol, bus = bus)
1902
service = AvahiService(name = server_settings["servicename"],
1903
servicetype = "_mandos._tcp",
1904
protocol = protocol, bus = bus)
2344
1905
if server_settings["interface"]:
2345
1906
service.interface = (if_nametoindex
2346
1907
(str(server_settings["interface"])))
2351
1912
client_class = Client
2352
1913
if use_dbus:
2353
1914
client_class = functools.partial(ClientDBus, bus = bus)
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))
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):
2424
1922
try:
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
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()))
2449
1932
if not tcp_server.clients:
2450
1933
logger.warning("No clients defined")
2451
1934
2452
1935
if not debug:
2453
1936
try:
2454
1937
with pidfile:
2462
1945
# "pidfile" was never created
2463
1946
pass
2464
1947
del pidfilename
2465
1948
1949
signal.signal(signal.SIGINT, signal.SIG_IGN)
1950
2466
1951
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2467
1952
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2468
1953
2469
1954
if use_dbus:
2470
@alternate_dbus_interfaces({"se.recompile.Mandos":
2471
"se.bsnet.fukt.Mandos"})
2472
class MandosDBusService(DBusObjectWithProperties):
1955
class MandosDBusService(dbus.service.Object):
2473
1956
"""A D-Bus proxy object"""
2474
1957
def __init__(self):
2475
1958
dbus.service.Object.__init__(self, bus, "/")
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"}
1959
_interface = "se.bsnet.fukt.Mandos"
2483
1960
2484
1961
@dbus.service.signal(_interface, signature="o")
2485
1962
def ClientAdded(self, objpath):
2500
1977
def GetAllClients(self):
2501
1978
"D-Bus method"
2502
1979
return dbus.Array(c.dbus_object_path
2503
for c in
2504
tcp_server.clients.itervalues())
1980
for c in tcp_server.clients)
2505
1981
2506
1982
@dbus.service.method(_interface,
2507
1983
out_signature="a{oa{sv}}")
2509
1985
"D-Bus method"
2510
1986
return dbus.Dictionary(
2511
1987
((c.dbus_object_path, c.GetAll(""))
2512
for c in tcp_server.clients.itervalues()),
1988
for c in tcp_server.clients),
2513
1989
signature="oa{sv}")
2514
1990
2515
1991
@dbus.service.method(_interface, in_signature="o")
2516
1992
def RemoveClient(self, object_path):
2517
1993
"D-Bus method"
2518
for c in tcp_server.clients.itervalues():
1994
for c in tcp_server.clients:
2519
1995
if c.dbus_object_path == object_path:
2520
del tcp_server.clients[c.name]
1996
tcp_server.clients.remove(c)
2521
1997
c.remove_from_connection()
2522
1998
# Don't signal anything except ClientRemoved
2523
1999
c.disable(quiet=True)
2534
2010
"Cleanup function; run on exit"
2535
2011
service.cleanup()
2536
2012
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
2592
2013
while tcp_server.clients:
2593
name, client = tcp_server.clients.popitem()
2014
client = tcp_server.clients.pop()
2594
2015
if use_dbus:
2595
2016
client.remove_from_connection()
2017
client.disable_hook = None
2596
2018
# Don't signal anything except ClientRemoved
2597
2019
client.disable(quiet=True)
2598
2020
if use_dbus:
2599
2021
# Emit D-Bus signal
2600
mandos_dbus_service.ClientRemoved(client
2601
.dbus_object_path,
2022
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2602
2023
client.name)
2603
client_settings.clear()
2604
2024
2605
2025
atexit.register(cleanup)
2606
2026
2607
for client in tcp_server.clients.itervalues():
2027
for client in tcp_server.clients:
2608
2028
if use_dbus:
2609
2029
# Emit D-Bus signal
2610
2030
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2611
# Need to initiate checking of clients
2612
if client.enabled:
2613
client.init_checker()
2031
client.enable()
2614
2032
2615
2033
tcp_server.enable()
2616
2034
tcp_server.server_activate()
2619
2037
service.port = tcp_server.socket.getsockname()[1]
2620
2038
if use_ipv6:
2621
2039
logger.info("Now listening on address %r, port %d,"
2622
" flowinfo %d, scope_id %d",
2623
*tcp_server.socket.getsockname())
2040
" flowinfo %d, scope_id %d"
2041
% tcp_server.socket.getsockname())
2624
2042
else: # IPv4
2625
logger.info("Now listening on address %r, port %d",
2626
*tcp_server.socket.getsockname())
2043
logger.info("Now listening on address %r, port %d"
2044
% tcp_server.socket.getsockname())
2627
2045
2628
2046
#service.interface = tcp_server.socket.getsockname()[3]
2629
2047
2632
2050
try:
2633
2051
service.activate()
2634
2052
except dbus.exceptions.DBusException as error:
2635
logger.critical("D-Bus Exception", exc_info=error)
2053
logger.critical("DBusException: %s", error)
2636
2054
cleanup()
2637
2055
sys.exit(1)
2638
2056
# End of Avahi example code
2645
2063
logger.debug("Starting main loop")
2646
2064
main_loop.run()
2647
2065
except AvahiError as error:
2648
logger.critical("Avahi Error", exc_info=error)
2066
logger.critical("AvahiError: %s", error)
2649
2067
cleanup()
2650
2068
sys.exit(1)
2651
2069
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0