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- Committer: Teddy Hogeborn
- Date: 2014-05-12 13:14:57 UTC
- mfrom: (237.4.43 release)
- Revision ID: teddy@recompile.se-20140512131457-yupek8sqkke2ini8
Merge from release branch.
- files added:
- debian/mandos-client.examples
- debian/upstream
- 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 © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
14
# Copyright © 2008-2014 Teddy Hogeborn
15
# Copyright © 2008-2014 Björn Påhlsson
16
16
#
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17
# 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
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
41
import argparse
63
65
import cPickle as pickle
64
66
import multiprocessing
65
67
import types
66
import hashlib
68
import binascii
69
import tempfile
70
import itertools
71
import collections
67
72
68
73
import dbus
69
74
import dbus.service
74
79
import ctypes.util
75
80
import xml.dom.minidom
76
81
import inspect
77
import Crypto.Cipher.AES
78
82
79
83
try:
80
84
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
84
88
except ImportError:
85
89
SO_BINDTODEVICE = None
86
90
87
88
version = "1.4.1"
89
90
stored_state_path = "/var/lib/mandos/clients.pickle"
91
92
#logger = logging.getLogger('mandos')
93
logger = logging.Logger('mandos')
94
syslogger = (logging.handlers.SysLogHandler
95
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
96
address = str("/dev/log")))
97
syslogger.setFormatter(logging.Formatter
98
('Mandos [%(process)d]: %(levelname)s:'
99
' %(message)s'))
100
logger.addHandler(syslogger)
101
102
console = logging.StreamHandler()
103
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
104
' %(levelname)s:'
105
' %(message)s'))
106
logger.addHandler(console)
91
version = "1.6.5"
92
stored_state_file = "clients.pickle"
93
94
logger = logging.getLogger()
95
syslogger = None
96
97
try:
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.if_nametoindex)
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
108
interface))
109
interface_index = struct.unpack(str("I"),
110
ifreq[16:20])[0]
111
return interface_index
112
113
114
def initlogger(debug, level=logging.WARNING):
115
"""init logger and add loglevel"""
116
117
syslogger = (logging.handlers.SysLogHandler
118
(facility =
119
logging.handlers.SysLogHandler.LOG_DAEMON,
120
address = str("/dev/log")))
121
syslogger.setFormatter(logging.Formatter
122
('Mandos [%(process)d]: %(levelname)s:'
123
' %(message)s'))
124
logger.addHandler(syslogger)
125
126
if debug:
127
console = logging.StreamHandler()
128
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
129
' [%(process)d]:'
130
' %(levelname)s:'
131
' %(message)s'))
132
logger.addHandler(console)
133
logger.setLevel(level)
134
135
136
class PGPError(Exception):
137
"""Exception if encryption/decryption fails"""
138
pass
139
140
141
class PGPEngine(object):
142
"""A simple class for OpenPGP symmetric encryption & decryption"""
143
def __init__(self):
144
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
145
self.gnupgargs = ['--batch',
146
'--home', self.tempdir,
147
'--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):
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self._cleanup()
156
return False
157
158
def __del__(self):
159
self._cleanup()
160
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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
encoded = b"mandos" + binascii.hexlify(password)
178
if len(encoded) > 2048:
179
# GnuPG can't handle long passwords, so encode differently
180
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
181
.replace(b"\n", b"\\n")
182
.replace(b"\0", b"\\x00"))
183
return encoded
184
185
def encrypt(self, data, password):
186
passphrase = self.password_encode(password)
187
with tempfile.NamedTemporaryFile(dir=self.tempdir
188
) as passfile:
189
passfile.write(passphrase)
190
passfile.flush()
191
proc = subprocess.Popen(['gpg', '--symmetric',
192
'--passphrase-file',
193
passfile.name]
194
+ self.gnupgargs,
195
stdin = subprocess.PIPE,
196
stdout = subprocess.PIPE,
197
stderr = subprocess.PIPE)
198
ciphertext, err = proc.communicate(input = data)
199
if proc.returncode != 0:
200
raise PGPError(err)
201
return ciphertext
202
203
def decrypt(self, data, password):
204
passphrase = self.password_encode(password)
205
with tempfile.NamedTemporaryFile(dir = self.tempdir
206
) as passfile:
207
passfile.write(passphrase)
208
passfile.flush()
209
proc = subprocess.Popen(['gpg', '--decrypt',
210
'--passphrase-file',
211
passfile.name]
212
+ self.gnupgargs,
213
stdin = subprocess.PIPE,
214
stdout = subprocess.PIPE,
215
stderr = subprocess.PIPE)
216
decrypted_plaintext, err = proc.communicate(input
217
= data)
218
if proc.returncode != 0:
219
raise PGPError(err)
220
return decrypted_plaintext
221
107
222
108
223
class AvahiError(Exception):
109
224
def __init__(self, value, *args, **kwargs):
127
242
Used to optionally bind to the specified interface.
128
243
name: string; Example: 'Mandos'
129
244
type: string; Example: '_mandos._tcp'.
130
See <http://www.dns-sd.org/ServiceTypes.html>
245
See <https://www.iana.org/assignments/service-names-port-numbers>
131
246
port: integer; what port to announce
132
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TXT: list of strings; TXT record for the service
133
248
domain: string; Domain to publish on, default to .local if empty.
139
254
server: D-Bus Server
140
255
bus: dbus.SystemBus()
141
256
"""
257
142
258
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
143
259
servicetype = None, port = None, TXT = None,
144
260
domain = "", host = "", max_renames = 32768,
157
273
self.server = None
158
274
self.bus = bus
159
275
self.entry_group_state_changed_match = None
276
160
277
def rename(self):
161
278
"""Derived from the Avahi example code"""
162
279
if self.rename_count >= self.max_renames:
168
285
.GetAlternativeServiceName(self.name))
169
286
logger.info("Changing Zeroconf service name to %r ...",
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287
self.name)
171
syslogger.setFormatter(logging.Formatter
172
('Mandos (%s) [%%(process)d]:'
173
' %%(levelname)s: %%(message)s'
174
% self.name))
175
288
self.remove()
176
289
try:
177
290
self.add()
178
291
except dbus.exceptions.DBusException as error:
179
logger.critical("DBusException: %s", error)
292
logger.critical("D-Bus Exception", exc_info=error)
180
293
self.cleanup()
181
294
os._exit(1)
182
295
self.rename_count += 1
296
183
297
def remove(self):
184
298
"""Derived from the Avahi example code"""
185
299
if self.entry_group_state_changed_match is not None:
187
301
self.entry_group_state_changed_match = None
188
302
if self.group is not None:
189
303
self.group.Reset()
304
190
305
def add(self):
191
306
"""Derived from the Avahi example code"""
192
307
self.remove()
197
312
avahi.DBUS_INTERFACE_ENTRY_GROUP)
198
313
self.entry_group_state_changed_match = (
199
314
self.group.connect_to_signal(
200
'StateChanged', self .entry_group_state_changed))
315
'StateChanged', self.entry_group_state_changed))
201
316
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
202
317
self.name, self.type)
203
318
self.group.AddService(
209
324
dbus.UInt16(self.port),
210
325
avahi.string_array_to_txt_array(self.TXT))
211
326
self.group.Commit()
327
212
328
def entry_group_state_changed(self, state, error):
213
329
"""Derived from the Avahi example code"""
214
330
logger.debug("Avahi entry group state change: %i", state)
221
337
elif state == avahi.ENTRY_GROUP_FAILURE:
222
338
logger.critical("Avahi: Error in group state changed %s",
223
339
unicode(error))
224
raise AvahiGroupError("State changed: %s"
225
% unicode(error))
340
raise AvahiGroupError("State changed: {0!s}"
341
.format(error))
342
226
343
def cleanup(self):
227
344
"""Derived from the Avahi example code"""
228
345
if self.group is not None:
229
346
try:
230
347
self.group.Free()
231
348
except (dbus.exceptions.UnknownMethodException,
232
dbus.exceptions.DBusException) as e:
349
dbus.exceptions.DBusException):
233
350
pass
234
351
self.group = None
235
352
self.remove()
353
236
354
def server_state_changed(self, state, error=None):
237
355
"""Derived from the Avahi example code"""
238
356
logger.debug("Avahi server state change: %i", state)
257
375
logger.debug("Unknown state: %r", state)
258
376
else:
259
377
logger.debug("Unknown state: %r: %r", state, error)
378
260
379
def activate(self):
261
380
"""Derived from the Avahi example code"""
262
381
if self.server is None:
270
389
self.server_state_changed(self.server.GetState())
271
390
272
391
273
def _timedelta_to_milliseconds(td):
392
class AvahiServiceToSyslog(AvahiService):
393
def rename(self):
394
"""Add the new name to the syslog messages"""
395
ret = AvahiService.rename(self)
396
syslogger.setFormatter(logging.Formatter
397
('Mandos ({0}) [%(process)d]:'
398
' %(levelname)s: %(message)s'
399
.format(self.name)))
400
return ret
401
402
403
def timedelta_to_milliseconds(td):
274
404
"Convert a datetime.timedelta() to milliseconds"
275
405
return ((td.days * 24 * 60 * 60 * 1000)
276
406
+ (td.seconds * 1000)
277
407
+ (td.microseconds // 1000))
278
408
409
279
410
class Client(object):
280
411
"""A representation of a client host served by this server.
281
412
282
413
Attributes:
283
_approved: bool(); 'None' if not yet approved/disapproved
414
approved: bool(); 'None' if not yet approved/disapproved
284
415
approval_delay: datetime.timedelta(); Time to wait for approval
285
416
approval_duration: datetime.timedelta(); Duration of one approval
286
417
checker: subprocess.Popen(); a running checker process used
304
435
interval: datetime.timedelta(); How often to start a new checker
305
436
last_approval_request: datetime.datetime(); (UTC) or None
306
437
last_checked_ok: datetime.datetime(); (UTC) or None
307
Last_checker_status: integer between 0 and 255 reflecting exit status
308
of last checker. -1 reflect crashed checker.
309
last_enabled: datetime.datetime(); (UTC)
438
last_checker_status: integer between 0 and 255 reflecting exit
439
status of last checker. -1 reflects crashed
440
checker, -2 means no checker completed yet.
441
last_enabled: datetime.datetime(); (UTC) or None
310
442
name: string; from the config file, used in log messages and
311
443
D-Bus identifiers
312
444
secret: bytestring; sent verbatim (over TLS) to client
313
445
timeout: datetime.timedelta(); How long from last_checked_ok
314
446
until this client is disabled
315
extended_timeout: extra long timeout when password has been sent
447
extended_timeout: extra long timeout when secret has been sent
316
448
runtime_expansions: Allowed attributes for runtime expansion.
317
449
expires: datetime.datetime(); time (UTC) when a client will be
318
450
disabled, or None
451
server_settings: The server_settings dict from main()
319
452
"""
320
453
321
454
runtime_expansions = ("approval_delay", "approval_duration",
322
"created", "enabled", "fingerprint",
323
"host", "interval", "last_checked_ok",
455
"created", "enabled", "expires",
456
"fingerprint", "host", "interval",
457
"last_approval_request", "last_checked_ok",
324
458
"last_enabled", "name", "timeout")
459
client_defaults = { "timeout": "PT5M",
460
"extended_timeout": "PT15M",
461
"interval": "PT2M",
462
"checker": "fping -q -- %%(host)s",
463
"host": "",
464
"approval_delay": "PT0S",
465
"approval_duration": "PT1S",
466
"approved_by_default": "True",
467
"enabled": "True",
468
}
325
469
326
470
def timeout_milliseconds(self):
327
471
"Return the 'timeout' attribute in milliseconds"
328
return _timedelta_to_milliseconds(self.timeout)
472
return timedelta_to_milliseconds(self.timeout)
329
473
330
474
def extended_timeout_milliseconds(self):
331
475
"Return the 'extended_timeout' attribute in milliseconds"
332
return _timedelta_to_milliseconds(self.extended_timeout)
476
return timedelta_to_milliseconds(self.extended_timeout)
333
477
334
478
def interval_milliseconds(self):
335
479
"Return the 'interval' attribute in milliseconds"
336
return _timedelta_to_milliseconds(self.interval)
480
return timedelta_to_milliseconds(self.interval)
337
481
338
482
def approval_delay_milliseconds(self):
339
return _timedelta_to_milliseconds(self.approval_delay)
340
341
def __init__(self, name = None, config=None):
342
"""Note: the 'checker' key in 'config' sets the
343
'checker_command' attribute and *not* the 'checker'
344
attribute."""
483
return timedelta_to_milliseconds(self.approval_delay)
484
485
@staticmethod
486
def config_parser(config):
487
"""Construct a new dict of client settings of this form:
488
{ client_name: {setting_name: value, ...}, ...}
489
with exceptions for any special settings as defined above.
490
NOTE: Must be a pure function. Must return the same result
491
value given the same arguments.
492
"""
493
settings = {}
494
for client_name in config.sections():
495
section = dict(config.items(client_name))
496
client = settings[client_name] = {}
497
498
client["host"] = section["host"]
499
# Reformat values from string types to Python types
500
client["approved_by_default"] = config.getboolean(
501
client_name, "approved_by_default")
502
client["enabled"] = config.getboolean(client_name,
503
"enabled")
504
505
client["fingerprint"] = (section["fingerprint"].upper()
506
.replace(" ", ""))
507
if "secret" in section:
508
client["secret"] = section["secret"].decode("base64")
509
elif "secfile" in section:
510
with open(os.path.expanduser(os.path.expandvars
511
(section["secfile"])),
512
"rb") as secfile:
513
client["secret"] = secfile.read()
514
else:
515
raise TypeError("No secret or secfile for section {0}"
516
.format(section))
517
client["timeout"] = string_to_delta(section["timeout"])
518
client["extended_timeout"] = string_to_delta(
519
section["extended_timeout"])
520
client["interval"] = string_to_delta(section["interval"])
521
client["approval_delay"] = string_to_delta(
522
section["approval_delay"])
523
client["approval_duration"] = string_to_delta(
524
section["approval_duration"])
525
client["checker_command"] = section["checker"]
526
client["last_approval_request"] = None
527
client["last_checked_ok"] = None
528
client["last_checker_status"] = -2
529
530
return settings
531
532
def __init__(self, settings, name = None, server_settings=None):
345
533
self.name = name
346
if config is None:
347
config = {}
534
if server_settings is None:
535
server_settings = {}
536
self.server_settings = server_settings
537
# adding all client settings
538
for setting, value in settings.iteritems():
539
setattr(self, setting, value)
540
541
if self.enabled:
542
if not hasattr(self, "last_enabled"):
543
self.last_enabled = datetime.datetime.utcnow()
544
if not hasattr(self, "expires"):
545
self.expires = (datetime.datetime.utcnow()
546
+ self.timeout)
547
else:
548
self.last_enabled = None
549
self.expires = None
550
348
551
logger.debug("Creating client %r", self.name)
349
552
# Uppercase and remove spaces from fingerprint for later
350
553
# comparison purposes with return value from the fingerprint()
351
554
# function
352
self.fingerprint = (config["fingerprint"].upper()
353
.replace(" ", ""))
354
555
logger.debug(" Fingerprint: %s", self.fingerprint)
355
if "secret" in config:
356
self.secret = config["secret"].decode("base64")
357
elif "secfile" in config:
358
with open(os.path.expanduser(os.path.expandvars
359
(config["secfile"])),
360
"rb") as secfile:
361
self.secret = secfile.read()
362
else:
363
raise TypeError("No secret or secfile for client %s"
364
% self.name)
365
self.host = config.get("host", "")
366
self.created = datetime.datetime.utcnow()
367
self.enabled = True
368
self.last_approval_request = None
369
self.last_enabled = datetime.datetime.utcnow()
370
self.last_checked_ok = None
371
self.last_checker_status = 0
372
self.timeout = string_to_delta(config["timeout"])
373
self.extended_timeout = string_to_delta(config
374
["extended_timeout"])
375
self.interval = string_to_delta(config["interval"])
556
self.created = settings.get("created",
557
datetime.datetime.utcnow())
558
559
# attributes specific for this server instance
376
560
self.checker = None
377
561
self.checker_initiator_tag = None
378
562
self.disable_initiator_tag = None
379
self.expires = datetime.datetime.utcnow() + self.timeout
380
563
self.checker_callback_tag = None
381
self.checker_command = config["checker"]
382
564
self.current_checker_command = None
383
self._approved = None
384
self.approved_by_default = config.get("approved_by_default",
385
True)
565
self.approved = None
386
566
self.approvals_pending = 0
387
self.approval_delay = string_to_delta(
388
config["approval_delay"])
389
self.approval_duration = string_to_delta(
390
config["approval_duration"])
391
567
self.changedstate = (multiprocessing_manager
392
568
.Condition(multiprocessing_manager
393
569
.Lock()))
394
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
570
self.client_structure = [attr for attr in
571
self.__dict__.iterkeys()
572
if not attr.startswith("_")]
395
573
self.client_structure.append("client_structure")
396
397
574
398
575
for name, t in inspect.getmembers(type(self),
399
lambda obj: isinstance(obj, property)):
576
lambda obj:
577
isinstance(obj,
578
property)):
400
579
if not name.startswith("_"):
401
580
self.client_structure.append(name)
402
581
403
582
# Send notice to process children that client state has changed
404
583
def send_changedstate(self):
405
self.changedstate.acquire()
406
self.changedstate.notify_all()
407
self.changedstate.release()
584
with self.changedstate:
585
self.changedstate.notify_all()
408
586
409
587
def enable(self):
410
588
"""Start this client's checker and timeout hooks"""
411
589
if getattr(self, "enabled", False):
412
590
# Already enabled
413
591
return
414
self.send_changedstate()
415
592
self.expires = datetime.datetime.utcnow() + self.timeout
416
593
self.enabled = True
417
594
self.last_enabled = datetime.datetime.utcnow()
418
595
self.init_checker()
596
self.send_changedstate()
419
597
420
598
def disable(self, quiet=True):
421
599
"""Disable this client."""
422
600
if not getattr(self, "enabled", False):
423
601
return False
424
602
if not quiet:
425
self.send_changedstate()
426
if not quiet:
427
603
logger.info("Disabling client %s", self.name)
428
if getattr(self, "disable_initiator_tag", False):
604
if getattr(self, "disable_initiator_tag", None) is not None:
429
605
gobject.source_remove(self.disable_initiator_tag)
430
606
self.disable_initiator_tag = None
431
607
self.expires = None
432
if getattr(self, "checker_initiator_tag", False):
608
if getattr(self, "checker_initiator_tag", None) is not None:
433
609
gobject.source_remove(self.checker_initiator_tag)
434
610
self.checker_initiator_tag = None
435
611
self.stop_checker()
436
612
self.enabled = False
613
if not quiet:
614
self.send_changedstate()
437
615
# Do not run this again if called by a gobject.timeout_add
438
616
return False
439
617
440
618
def __del__(self):
441
619
self.disable()
442
620
443
621
def init_checker(self):
444
622
# Schedule a new checker to be started an 'interval' from now,
445
623
# and every interval from then on.
624
if self.checker_initiator_tag is not None:
625
gobject.source_remove(self.checker_initiator_tag)
446
626
self.checker_initiator_tag = (gobject.timeout_add
447
627
(self.interval_milliseconds(),
448
628
self.start_checker))
449
629
# Schedule a disable() when 'timeout' has passed
630
if self.disable_initiator_tag is not None:
631
gobject.source_remove(self.disable_initiator_tag)
450
632
self.disable_initiator_tag = (gobject.timeout_add
451
633
(self.timeout_milliseconds(),
452
634
self.disable))
453
635
# Also start a new checker *right now*.
454
636
self.start_checker()
455
456
637
457
638
def checker_callback(self, pid, condition, command):
458
639
"""The checker has completed, so take appropriate actions."""
459
640
self.checker_callback_tag = None
460
641
self.checker = None
461
642
if os.WIFEXITED(condition):
462
self.last_checker_status = os.WEXITSTATUS(condition)
643
self.last_checker_status = os.WEXITSTATUS(condition)
463
644
if self.last_checker_status == 0:
464
645
logger.info("Checker for %(name)s succeeded",
465
646
vars(self))
472
653
logger.warning("Checker for %(name)s crashed?",
473
654
vars(self))
474
655
475
def checked_ok(self, timeout=None):
476
"""Bump up the timeout for this client.
477
478
This should only be called when the client has been seen,
479
alive and well.
480
"""
656
def checked_ok(self):
657
"""Assert that the client has been seen, alive and well."""
658
self.last_checked_ok = datetime.datetime.utcnow()
659
self.last_checker_status = 0
660
self.bump_timeout()
661
662
def bump_timeout(self, timeout=None):
663
"""Bump up the timeout for this client."""
481
664
if timeout is None:
482
665
timeout = self.timeout
483
self.last_checked_ok = datetime.datetime.utcnow()
484
666
if self.disable_initiator_tag is not None:
485
667
gobject.source_remove(self.disable_initiator_tag)
668
self.disable_initiator_tag = None
486
669
if getattr(self, "enabled", False):
487
670
self.disable_initiator_tag = (gobject.timeout_add
488
(_timedelta_to_milliseconds
671
(timedelta_to_milliseconds
489
672
(timeout), self.disable))
490
673
self.expires = datetime.datetime.utcnow() + timeout
491
674
498
681
If a checker already exists, leave it running and do
499
682
nothing."""
500
683
# The reason for not killing a running checker is that if we
501
# did that, then if a checker (for some reason) started
502
# running slowly and taking more than 'interval' time, the
503
# client would inevitably timeout, since no checker would get
504
# a chance to run to completion. If we instead leave running
684
# did that, and if a checker (for some reason) started running
685
# slowly and taking more than 'interval' time, then the client
686
# would inevitably timeout, since no checker would get a
687
# chance to run to completion. If we instead leave running
505
688
# checkers alone, the checker would have to take more time
506
689
# than 'timeout' for the client to be disabled, which is as it
507
690
# should be.
509
692
# If a checker exists, make sure it is not a zombie
510
693
try:
511
694
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
512
except (AttributeError, OSError) as error:
513
if (isinstance(error, OSError)
514
and error.errno != errno.ECHILD):
515
raise error
695
except AttributeError:
696
pass
697
except OSError as error:
698
if error.errno != errno.ECHILD:
699
raise
516
700
else:
517
701
if pid:
518
702
logger.warning("Checker was a zombie")
521
705
self.current_checker_command)
522
706
# Start a new checker if needed
523
707
if self.checker is None:
708
# Escape attributes for the shell
709
escaped_attrs = dict(
710
(attr, re.escape(unicode(getattr(self, attr))))
711
for attr in
712
self.runtime_expansions)
524
713
try:
525
# In case checker_command has exactly one % operator
526
command = self.checker_command % self.host
527
except TypeError:
528
# Escape attributes for the shell
529
escaped_attrs = dict(
530
(attr,
531
re.escape(unicode(str(getattr(self, attr, "")),
532
errors=
533
'replace')))
534
for attr in
535
self.runtime_expansions)
536
537
try:
538
command = self.checker_command % escaped_attrs
539
except TypeError as error:
540
logger.error('Could not format string "%s":'
541
' %s', self.checker_command, error)
542
return True # Try again later
714
command = self.checker_command % escaped_attrs
715
except TypeError as error:
716
logger.error('Could not format string "%s"',
717
self.checker_command, exc_info=error)
718
return True # Try again later
543
719
self.current_checker_command = command
544
720
try:
545
721
logger.info("Starting checker %r for %s",
548
724
# in normal mode, that is already done by daemon(),
549
725
# and in debug mode we don't want to. (Stdin is
550
726
# always replaced by /dev/null.)
727
# The exception is when not debugging but nevertheless
728
# running in the foreground; use the previously
729
# created wnull.
730
popen_args = {}
731
if (not self.server_settings["debug"]
732
and self.server_settings["foreground"]):
733
popen_args.update({"stdout": wnull,
734
"stderr": wnull })
551
735
self.checker = subprocess.Popen(command,
552
736
close_fds=True,
553
shell=True, cwd="/")
554
self.checker_callback_tag = (gobject.child_watch_add
555
(self.checker.pid,
556
self.checker_callback,
557
data=command))
558
# The checker may have completed before the gobject
559
# watch was added. Check for this.
737
shell=True, cwd="/",
738
**popen_args)
739
except OSError as error:
740
logger.error("Failed to start subprocess",
741
exc_info=error)
742
return True
743
self.checker_callback_tag = (gobject.child_watch_add
744
(self.checker.pid,
745
self.checker_callback,
746
data=command))
747
# The checker may have completed before the gobject
748
# watch was added. Check for this.
749
try:
560
750
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
561
if pid:
562
gobject.source_remove(self.checker_callback_tag)
563
self.checker_callback(pid, status, command)
564
751
except OSError as error:
565
logger.error("Failed to start subprocess: %s",
566
error)
752
if error.errno == errno.ECHILD:
753
# This should never happen
754
logger.error("Child process vanished",
755
exc_info=error)
756
return True
757
raise
758
if pid:
759
gobject.source_remove(self.checker_callback_tag)
760
self.checker_callback(pid, status, command)
567
761
# Re-run this periodically if run by gobject.timeout_add
568
762
return True
569
763
576
770
return
577
771
logger.debug("Stopping checker for %(name)s", vars(self))
578
772
try:
579
os.kill(self.checker.pid, signal.SIGTERM)
773
self.checker.terminate()
580
774
#time.sleep(0.5)
581
775
#if self.checker.poll() is None:
582
# os.kill(self.checker.pid, signal.SIGKILL)
776
# self.checker.kill()
583
777
except OSError as error:
584
778
if error.errno != errno.ESRCH: # No such process
585
779
raise
586
780
self.checker = None
587
781
588
# Encrypts a client secret and stores it in a varible encrypted_secret
589
def encrypt_secret(self, key):
590
# Encryption-key need to be specific size, so we hash inputed key
591
hasheng = hashlib.sha256()
592
hasheng.update(key)
593
encryptionkey = hasheng.digest()
594
595
# Create validation hash so we know at decryption if it was sucessful
596
hasheng = hashlib.sha256()
597
hasheng.update(self.secret)
598
validationhash = hasheng.digest()
599
600
# Encrypt secret
601
iv = os.urandom(Crypto.Cipher.AES.block_size)
602
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
603
Crypto.Cipher.AES.MODE_CFB, iv)
604
ciphertext = ciphereng.encrypt(validationhash+self.secret)
605
self.encrypted_secret = (ciphertext, iv)
606
607
# Decrypt a encrypted client secret
608
def decrypt_secret(self, key):
609
# Decryption-key need to be specific size, so we hash inputed key
610
hasheng = hashlib.sha256()
611
hasheng.update(key)
612
encryptionkey = hasheng.digest()
613
614
# Decrypt encrypted secret
615
ciphertext, iv = self.encrypted_secret
616
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
617
Crypto.Cipher.AES.MODE_CFB, iv)
618
plain = ciphereng.decrypt(ciphertext)
619
620
# Validate decrypted secret to know if it was succesful
621
hasheng = hashlib.sha256()
622
validationhash = plain[:hasheng.digest_size]
623
secret = plain[hasheng.digest_size:]
624
hasheng.update(secret)
625
626
# if validation fails, we use key as new secret. Otherwhise, we use
627
# the decrypted secret
628
if hasheng.digest() == validationhash:
629
self.secret = secret
630
else:
631
self.secret = key
632
del self.encrypted_secret
633
634
782
635
783
def dbus_service_property(dbus_interface, signature="v",
636
784
access="readwrite", byte_arrays=False):
648
796
# "Set" method, so we fail early here:
649
797
if byte_arrays and signature != "ay":
650
798
raise ValueError("Byte arrays not supported for non-'ay'"
651
" signature %r" % signature)
799
" signature {0!r}".format(signature))
652
800
def decorator(func):
653
801
func._dbus_is_property = True
654
802
func._dbus_interface = dbus_interface
662
810
return decorator
663
811
664
812
813
def dbus_interface_annotations(dbus_interface):
814
"""Decorator for marking functions returning interface annotations
815
816
Usage:
817
818
@dbus_interface_annotations("org.example.Interface")
819
def _foo(self): # Function name does not matter
820
return {"org.freedesktop.DBus.Deprecated": "true",
821
"org.freedesktop.DBus.Property.EmitsChangedSignal":
822
"false"}
823
"""
824
def decorator(func):
825
func._dbus_is_interface = True
826
func._dbus_interface = dbus_interface
827
func._dbus_name = dbus_interface
828
return func
829
return decorator
830
831
832
def dbus_annotations(annotations):
833
"""Decorator to annotate D-Bus methods, signals or properties
834
Usage:
835
836
@dbus_service_property("org.example.Interface", signature="b",
837
access="r")
838
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
839
"org.freedesktop.DBus.Property."
840
"EmitsChangedSignal": "false"})
841
def Property_dbus_property(self):
842
return dbus.Boolean(False)
843
"""
844
def decorator(func):
845
func._dbus_annotations = annotations
846
return func
847
return decorator
848
849
665
850
class DBusPropertyException(dbus.exceptions.DBusException):
666
851
"""A base class for D-Bus property-related exceptions
667
852
"""
690
875
"""
691
876
692
877
@staticmethod
693
def _is_dbus_property(obj):
694
return getattr(obj, "_dbus_is_property", False)
878
def _is_dbus_thing(thing):
879
"""Returns a function testing if an attribute is a D-Bus thing
880
881
If called like _is_dbus_thing("method") it returns a function
882
suitable for use as predicate to inspect.getmembers().
883
"""
884
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
885
False)
695
886
696
def _get_all_dbus_properties(self):
887
def _get_all_dbus_things(self, thing):
697
888
"""Returns a generator of (name, attribute) pairs
698
889
"""
699
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
890
return ((getattr(athing.__get__(self), "_dbus_name",
891
name),
892
athing.__get__(self))
700
893
for cls in self.__class__.__mro__
701
for name, prop in
702
inspect.getmembers(cls, self._is_dbus_property))
894
for name, athing in
895
inspect.getmembers(cls,
896
self._is_dbus_thing(thing)))
703
897
704
898
def _get_dbus_property(self, interface_name, property_name):
705
899
"""Returns a bound method if one exists which is a D-Bus
707
901
"""
708
902
for cls in self.__class__.__mro__:
709
903
for name, value in (inspect.getmembers
710
(cls, self._is_dbus_property)):
904
(cls,
905
self._is_dbus_thing("property"))):
711
906
if (value._dbus_name == property_name
712
907
and value._dbus_interface == interface_name):
713
908
return value.__get__(self)
741
936
# The byte_arrays option is not supported yet on
742
937
# signatures other than "ay".
743
938
if prop._dbus_signature != "ay":
744
raise ValueError
745
value = dbus.ByteArray(''.join(unichr(byte)
746
for byte in value))
939
raise ValueError("Byte arrays not supported for non-"
940
"'ay' signature {0!r}"
941
.format(prop._dbus_signature))
942
value = dbus.ByteArray(b''.join(chr(byte)
943
for byte in value))
747
944
prop(value)
748
945
749
946
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
754
951
755
952
Note: Will not include properties with access="write".
756
953
"""
757
all = {}
758
for name, prop in self._get_all_dbus_properties():
954
properties = {}
955
for name, prop in self._get_all_dbus_things("property"):
759
956
if (interface_name
760
957
and interface_name != prop._dbus_interface):
761
958
# Interface non-empty but did not match
765
962
continue
766
963
value = prop()
767
964
if not hasattr(value, "variant_level"):
768
all[name] = value
965
properties[name] = value
769
966
continue
770
all[name] = type(value)(value, variant_level=
771
value.variant_level+1)
772
return dbus.Dictionary(all, signature="sv")
967
properties[name] = type(value)(value, variant_level=
968
value.variant_level+1)
969
return dbus.Dictionary(properties, signature="sv")
773
970
774
971
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
775
972
out_signature="s",
776
973
path_keyword='object_path',
777
974
connection_keyword='connection')
778
975
def Introspect(self, object_path, connection):
779
"""Standard D-Bus method, overloaded to insert property tags.
976
"""Overloading of standard D-Bus method.
977
978
Inserts property tags and interface annotation tags.
780
979
"""
781
980
xmlstring = dbus.service.Object.Introspect(self, object_path,
782
981
connection)
789
988
e.setAttribute("access", prop._dbus_access)
790
989
return e
791
990
for if_tag in document.getElementsByTagName("interface"):
991
# Add property tags
792
992
for tag in (make_tag(document, name, prop)
793
993
for name, prop
794
in self._get_all_dbus_properties()
994
in self._get_all_dbus_things("property")
795
995
if prop._dbus_interface
796
996
== if_tag.getAttribute("name")):
797
997
if_tag.appendChild(tag)
998
# Add annotation tags
999
for typ in ("method", "signal", "property"):
1000
for tag in if_tag.getElementsByTagName(typ):
1001
annots = dict()
1002
for name, prop in (self.
1003
_get_all_dbus_things(typ)):
1004
if (name == tag.getAttribute("name")
1005
and prop._dbus_interface
1006
== if_tag.getAttribute("name")):
1007
annots.update(getattr
1008
(prop,
1009
"_dbus_annotations",
1010
{}))
1011
for name, value in annots.iteritems():
1012
ann_tag = document.createElement(
1013
"annotation")
1014
ann_tag.setAttribute("name", name)
1015
ann_tag.setAttribute("value", value)
1016
tag.appendChild(ann_tag)
1017
# Add interface annotation tags
1018
for annotation, value in dict(
1019
itertools.chain.from_iterable(
1020
annotations().iteritems()
1021
for name, annotations in
1022
self._get_all_dbus_things("interface")
1023
if name == if_tag.getAttribute("name")
1024
)).iteritems():
1025
ann_tag = document.createElement("annotation")
1026
ann_tag.setAttribute("name", annotation)
1027
ann_tag.setAttribute("value", value)
1028
if_tag.appendChild(ann_tag)
798
1029
# Add the names to the return values for the
799
1030
# "org.freedesktop.DBus.Properties" methods
800
1031
if (if_tag.getAttribute("name")
815
1046
except (AttributeError, xml.dom.DOMException,
816
1047
xml.parsers.expat.ExpatError) as error:
817
1048
logger.error("Failed to override Introspection method",
818
error)
1049
exc_info=error)
819
1050
return xmlstring
820
1051
821
1052
822
def datetime_to_dbus (dt, variant_level=0):
1053
def datetime_to_dbus(dt, variant_level=0):
823
1054
"""Convert a UTC datetime.datetime() to a D-Bus type."""
824
1055
if dt is None:
825
1056
return dbus.String("", variant_level = variant_level)
826
1057
return dbus.String(dt.isoformat(),
827
1058
variant_level=variant_level)
828
1059
829
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
830
.__metaclass__):
831
"""Applied to an empty subclass of a D-Bus object, this metaclass
832
will add additional D-Bus attributes matching a certain pattern.
1060
1061
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1062
"""A class decorator; applied to a subclass of
1063
dbus.service.Object, it will add alternate D-Bus attributes with
1064
interface names according to the "alt_interface_names" mapping.
1065
Usage:
1066
1067
@alternate_dbus_interfaces({"org.example.Interface":
1068
"net.example.AlternateInterface"})
1069
class SampleDBusObject(dbus.service.Object):
1070
@dbus.service.method("org.example.Interface")
1071
def SampleDBusMethod():
1072
pass
1073
1074
The above "SampleDBusMethod" on "SampleDBusObject" will be
1075
reachable via two interfaces: "org.example.Interface" and
1076
"net.example.AlternateInterface", the latter of which will have
1077
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1078
"true", unless "deprecate" is passed with a False value.
1079
1080
This works for methods and signals, and also for D-Bus properties
1081
(from DBusObjectWithProperties) and interfaces (from the
1082
dbus_interface_annotations decorator).
833
1083
"""
834
def __new__(mcs, name, bases, attr):
835
# Go through all the base classes which could have D-Bus
836
# methods, signals, or properties in them
837
for base in (b for b in bases
838
if issubclass(b, dbus.service.Object)):
839
# Go though all attributes of the base class
840
for attrname, attribute in inspect.getmembers(base):
1084
def wrapper(cls):
1085
for orig_interface_name, alt_interface_name in (
1086
alt_interface_names.iteritems()):
1087
attr = {}
1088
interface_names = set()
1089
# Go though all attributes of the class
1090
for attrname, attribute in inspect.getmembers(cls):
841
1091
# Ignore non-D-Bus attributes, and D-Bus attributes
842
1092
# with the wrong interface name
843
1093
if (not hasattr(attribute, "_dbus_interface")
844
1094
or not attribute._dbus_interface
845
.startswith("se.recompile.Mandos")):
1095
.startswith(orig_interface_name)):
846
1096
continue
847
1097
# Create an alternate D-Bus interface name based on
848
1098
# the current name
849
1099
alt_interface = (attribute._dbus_interface
850
.replace("se.recompile.Mandos",
851
"se.bsnet.fukt.Mandos"))
1100
.replace(orig_interface_name,
1101
alt_interface_name))
1102
interface_names.add(alt_interface)
852
1103
# Is this a D-Bus signal?
853
1104
if getattr(attribute, "_dbus_is_signal", False):
854
# Extract the original non-method function by
855
# black magic
1105
# Extract the original non-method undecorated
1106
# function by black magic
856
1107
nonmethod_func = (dict(
857
1108
zip(attribute.func_code.co_freevars,
858
1109
attribute.__closure__))["func"]
869
1120
nonmethod_func.func_name,
870
1121
nonmethod_func.func_defaults,
871
1122
nonmethod_func.func_closure)))
1123
# Copy annotations, if any
1124
try:
1125
new_function._dbus_annotations = (
1126
dict(attribute._dbus_annotations))
1127
except AttributeError:
1128
pass
872
1129
# Define a creator of a function to call both the
873
# old and new functions, so both the old and new
874
# signals gets sent when the function is called
1130
# original and alternate functions, so both the
1131
# original and alternate signals gets sent when
1132
# the function is called
875
1133
def fixscope(func1, func2):
876
1134
"""This function is a scope container to pass
877
1135
func1 and func2 to the "call_both" function
884
1142
return call_both
885
1143
# Create the "call_both" function and add it to
886
1144
# the class
887
attr[attrname] = fixscope(attribute,
888
new_function)
1145
attr[attrname] = fixscope(attribute, new_function)
889
1146
# Is this a D-Bus method?
890
1147
elif getattr(attribute, "_dbus_is_method", False):
891
1148
# Create a new, but exactly alike, function
902
1159
attribute.func_name,
903
1160
attribute.func_defaults,
904
1161
attribute.func_closure)))
1162
# Copy annotations, if any
1163
try:
1164
attr[attrname]._dbus_annotations = (
1165
dict(attribute._dbus_annotations))
1166
except AttributeError:
1167
pass
905
1168
# Is this a D-Bus property?
906
1169
elif getattr(attribute, "_dbus_is_property", False):
907
1170
# Create a new, but exactly alike, function
921
1184
attribute.func_name,
922
1185
attribute.func_defaults,
923
1186
attribute.func_closure)))
924
return type.__new__(mcs, name, bases, attr)
925
1187
# Copy annotations, if any
1188
try:
1189
attr[attrname]._dbus_annotations = (
1190
dict(attribute._dbus_annotations))
1191
except AttributeError:
1192
pass
1193
# Is this a D-Bus interface?
1194
elif getattr(attribute, "_dbus_is_interface", False):
1195
# Create a new, but exactly alike, function
1196
# object. Decorate it to be a new D-Bus interface
1197
# with the alternate D-Bus interface name. Add it
1198
# to the class.
1199
attr[attrname] = (dbus_interface_annotations
1200
(alt_interface)
1201
(types.FunctionType
1202
(attribute.func_code,
1203
attribute.func_globals,
1204
attribute.func_name,
1205
attribute.func_defaults,
1206
attribute.func_closure)))
1207
if deprecate:
1208
# Deprecate all alternate interfaces
1209
iname="_AlternateDBusNames_interface_annotation{0}"
1210
for interface_name in interface_names:
1211
@dbus_interface_annotations(interface_name)
1212
def func(self):
1213
return { "org.freedesktop.DBus.Deprecated":
1214
"true" }
1215
# Find an unused name
1216
for aname in (iname.format(i)
1217
for i in itertools.count()):
1218
if aname not in attr:
1219
attr[aname] = func
1220
break
1221
if interface_names:
1222
# Replace the class with a new subclass of it with
1223
# methods, signals, etc. as created above.
1224
cls = type(b"{0}Alternate".format(cls.__name__),
1225
(cls,), attr)
1226
return cls
1227
return wrapper
1228
1229
1230
@alternate_dbus_interfaces({"se.recompile.Mandos":
1231
"se.bsnet.fukt.Mandos"})
926
1232
class ClientDBus(Client, DBusObjectWithProperties):
927
1233
"""A Client class using D-Bus
928
1234
939
1245
def __init__(self, bus = None, *args, **kwargs):
940
1246
self.bus = bus
941
1247
Client.__init__(self, *args, **kwargs)
942
943
self._approvals_pending = 0
944
1248
# Only now, when this client is initialized, can it show up on
945
1249
# the D-Bus
946
1250
client_object_name = unicode(self.name).translate(
950
1254
("/clients/" + client_object_name))
951
1255
DBusObjectWithProperties.__init__(self, self.bus,
952
1256
self.dbus_object_path)
953
1257
954
1258
def notifychangeproperty(transform_func,
955
1259
dbus_name, type_func=lambda x: x,
956
1260
variant_level=1):
957
1261
""" Modify a variable so that it's a property which announces
958
1262
its changes to DBus.
959
1263
960
1264
transform_fun: Function that takes a value and a variant_level
961
1265
and transforms it to a D-Bus type.
962
1266
dbus_name: D-Bus name of the variable
979
1283
980
1284
return property(lambda self: getattr(self, attrname), setter)
981
1285
982
983
1286
expires = notifychangeproperty(datetime_to_dbus, "Expires")
984
1287
approvals_pending = notifychangeproperty(dbus.Boolean,
985
1288
"ApprovalPending",
992
1295
checker is not None)
993
1296
last_checked_ok = notifychangeproperty(datetime_to_dbus,
994
1297
"LastCheckedOK")
1298
last_checker_status = notifychangeproperty(dbus.Int16,
1299
"LastCheckerStatus")
995
1300
last_approval_request = notifychangeproperty(
996
1301
datetime_to_dbus, "LastApprovalRequest")
997
1302
approved_by_default = notifychangeproperty(dbus.Boolean,
998
1303
"ApprovedByDefault")
999
approval_delay = notifychangeproperty(dbus.UInt16,
1304
approval_delay = notifychangeproperty(dbus.UInt64,
1000
1305
"ApprovalDelay",
1001
1306
type_func =
1002
_timedelta_to_milliseconds)
1307
timedelta_to_milliseconds)
1003
1308
approval_duration = notifychangeproperty(
1004
dbus.UInt16, "ApprovalDuration",
1005
type_func = _timedelta_to_milliseconds)
1309
dbus.UInt64, "ApprovalDuration",
1310
type_func = timedelta_to_milliseconds)
1006
1311
host = notifychangeproperty(dbus.String, "Host")
1007
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1312
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1008
1313
type_func =
1009
_timedelta_to_milliseconds)
1314
timedelta_to_milliseconds)
1010
1315
extended_timeout = notifychangeproperty(
1011
dbus.UInt16, "ExtendedTimeout",
1012
type_func = _timedelta_to_milliseconds)
1013
interval = notifychangeproperty(dbus.UInt16,
1316
dbus.UInt64, "ExtendedTimeout",
1317
type_func = timedelta_to_milliseconds)
1318
interval = notifychangeproperty(dbus.UInt64,
1014
1319
"Interval",
1015
1320
type_func =
1016
_timedelta_to_milliseconds)
1321
timedelta_to_milliseconds)
1017
1322
checker_command = notifychangeproperty(dbus.String, "Checker")
1018
1323
1019
1324
del notifychangeproperty
1047
1352
*args, **kwargs)
1048
1353
1049
1354
def start_checker(self, *args, **kwargs):
1050
old_checker = self.checker
1051
if self.checker is not None:
1052
old_checker_pid = self.checker.pid
1053
else:
1054
old_checker_pid = None
1355
old_checker_pid = getattr(self.checker, "pid", None)
1055
1356
r = Client.start_checker(self, *args, **kwargs)
1056
1357
# Only if new checker process was started
1057
1358
if (self.checker is not None
1061
1362
return r
1062
1363
1063
1364
def _reset_approved(self):
1064
self._approved = None
1365
self.approved = None
1065
1366
return False
1066
1367
1067
1368
def approve(self, value=True):
1068
self.send_changedstate()
1069
self._approved = value
1070
gobject.timeout_add(_timedelta_to_milliseconds
1369
self.approved = value
1370
gobject.timeout_add(timedelta_to_milliseconds
1071
1371
(self.approval_duration),
1072
1372
self._reset_approved)
1073
1373
self.send_changedstate()
1074
1374
1075
1375
## D-Bus methods, signals & properties
1076
1376
_interface = "se.recompile.Mandos.Client"
1077
1377
1378
## Interfaces
1379
1380
@dbus_interface_annotations(_interface)
1381
def _foo(self):
1382
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1383
"false"}
1384
1078
1385
## Signals
1079
1386
1080
1387
# CheckerCompleted - signal
1179
1486
access="readwrite")
1180
1487
def ApprovalDuration_dbus_property(self, value=None):
1181
1488
if value is None: # get
1182
return dbus.UInt64(_timedelta_to_milliseconds(
1489
return dbus.UInt64(timedelta_to_milliseconds(
1183
1490
self.approval_duration))
1184
1491
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1185
1492
1199
1506
def Host_dbus_property(self, value=None):
1200
1507
if value is None: # get
1201
1508
return dbus.String(self.host)
1202
self.host = value
1509
self.host = unicode(value)
1203
1510
1204
1511
# Created - property
1205
1512
@dbus_service_property(_interface, signature="s", access="read")
1206
1513
def Created_dbus_property(self):
1207
return dbus.String(datetime_to_dbus(self.created))
1514
return datetime_to_dbus(self.created)
1208
1515
1209
1516
# LastEnabled - property
1210
1517
@dbus_service_property(_interface, signature="s", access="read")
1231
1538
return
1232
1539
return datetime_to_dbus(self.last_checked_ok)
1233
1540
1541
# LastCheckerStatus - property
1542
@dbus_service_property(_interface, signature="n",
1543
access="read")
1544
def LastCheckerStatus_dbus_property(self):
1545
return dbus.Int16(self.last_checker_status)
1546
1234
1547
# Expires - property
1235
1548
@dbus_service_property(_interface, signature="s", access="read")
1236
1549
def Expires_dbus_property(self):
1247
1560
def Timeout_dbus_property(self, value=None):
1248
1561
if value is None: # get
1249
1562
return dbus.UInt64(self.timeout_milliseconds())
1563
old_timeout = self.timeout
1250
1564
self.timeout = datetime.timedelta(0, 0, 0, value)
1251
if getattr(self, "disable_initiator_tag", None) is None:
1252
return
1253
# Reschedule timeout
1254
gobject.source_remove(self.disable_initiator_tag)
1255
self.disable_initiator_tag = None
1256
self.expires = None
1257
time_to_die = _timedelta_to_milliseconds((self
1258
.last_checked_ok
1259
+ self.timeout)
1260
- datetime.datetime
1261
.utcnow())
1262
if time_to_die <= 0:
1263
# The timeout has passed
1264
self.disable()
1265
else:
1266
self.expires = (datetime.datetime.utcnow()
1267
+ datetime.timedelta(milliseconds =
1268
time_to_die))
1269
self.disable_initiator_tag = (gobject.timeout_add
1270
(time_to_die, self.disable))
1565
# Reschedule disabling
1566
if self.enabled:
1567
now = datetime.datetime.utcnow()
1568
self.expires += self.timeout - old_timeout
1569
if self.expires <= now:
1570
# The timeout has passed
1571
self.disable()
1572
else:
1573
if (getattr(self, "disable_initiator_tag", None)
1574
is None):
1575
return
1576
gobject.source_remove(self.disable_initiator_tag)
1577
self.disable_initiator_tag = (
1578
gobject.timeout_add(
1579
timedelta_to_milliseconds(self.expires - now),
1580
self.disable))
1271
1581
1272
1582
# ExtendedTimeout - property
1273
1583
@dbus_service_property(_interface, signature="t",
1286
1596
self.interval = datetime.timedelta(0, 0, 0, value)
1287
1597
if getattr(self, "checker_initiator_tag", None) is None:
1288
1598
return
1289
# Reschedule checker run
1290
gobject.source_remove(self.checker_initiator_tag)
1291
self.checker_initiator_tag = (gobject.timeout_add
1292
(value, self.start_checker))
1293
self.start_checker() # Start one now, too
1599
if self.enabled:
1600
# Reschedule checker run
1601
gobject.source_remove(self.checker_initiator_tag)
1602
self.checker_initiator_tag = (gobject.timeout_add
1603
(value, self.start_checker))
1604
self.start_checker() # Start one now, too
1294
1605
1295
1606
# Checker - property
1296
1607
@dbus_service_property(_interface, signature="s",
1298
1609
def Checker_dbus_property(self, value=None):
1299
1610
if value is None: # get
1300
1611
return dbus.String(self.checker_command)
1301
self.checker_command = value
1612
self.checker_command = unicode(value)
1302
1613
1303
1614
# CheckerRunning - property
1304
1615
@dbus_service_property(_interface, signature="b",
1333
1644
raise KeyError()
1334
1645
1335
1646
def __getattribute__(self, name):
1336
if(name == '_pipe'):
1647
if name == '_pipe':
1337
1648
return super(ProxyClient, self).__getattribute__(name)
1338
1649
self._pipe.send(('getattr', name))
1339
1650
data = self._pipe.recv()
1346
1657
return func
1347
1658
1348
1659
def __setattr__(self, name, value):
1349
if(name == '_pipe'):
1660
if name == '_pipe':
1350
1661
return super(ProxyClient, self).__setattr__(name, value)
1351
1662
self._pipe.send(('setattr', name, value))
1352
1663
1353
class ClientDBusTransitional(ClientDBus):
1354
__metaclass__ = AlternateDBusNamesMetaclass
1355
1664
1356
1665
class ClientHandler(socketserver.BaseRequestHandler, object):
1357
1666
"""A class to handle client connections.
1394
1703
logger.debug("Protocol version: %r", line)
1395
1704
try:
1396
1705
if int(line.strip().split()[0]) > 1:
1397
raise RuntimeError
1706
raise RuntimeError(line)
1398
1707
except (ValueError, IndexError, RuntimeError) as error:
1399
1708
logger.error("Unknown protocol version: %s", error)
1400
1709
return
1440
1749
client.Rejected("Disabled")
1441
1750
return
1442
1751
1443
if client._approved or not client.approval_delay:
1752
if client.approved or not client.approval_delay:
1444
1753
#We are approved or approval is disabled
1445
1754
break
1446
elif client._approved is None:
1755
elif client.approved is None:
1447
1756
logger.info("Client %s needs approval",
1448
1757
client.name)
1449
1758
if self.server.use_dbus:
1462
1771
#wait until timeout or approved
1463
1772
time = datetime.datetime.now()
1464
1773
client.changedstate.acquire()
1465
(client.changedstate.wait
1466
(float(client._timedelta_to_milliseconds(delay)
1467
/ 1000)))
1774
client.changedstate.wait(
1775
float(timedelta_to_milliseconds(delay)
1776
/ 1000))
1468
1777
client.changedstate.release()
1469
1778
time2 = datetime.datetime.now()
1470
1779
if (time2 - time) >= delay:
1486
1795
try:
1487
1796
sent = session.send(client.secret[sent_size:])
1488
1797
except gnutls.errors.GNUTLSError as error:
1489
logger.warning("gnutls send failed")
1798
logger.warning("gnutls send failed",
1799
exc_info=error)
1490
1800
return
1491
1801
logger.debug("Sent: %d, remaining: %d",
1492
1802
sent, len(client.secret)
1495
1805
1496
1806
logger.info("Sending secret to %s", client.name)
1497
1807
# bump the timeout using extended_timeout
1498
client.checked_ok(client.extended_timeout)
1808
client.bump_timeout(client.extended_timeout)
1499
1809
if self.server.use_dbus:
1500
1810
# Emit D-Bus signal
1501
1811
client.GotSecret()
1506
1816
try:
1507
1817
session.bye()
1508
1818
except gnutls.errors.GNUTLSError as error:
1509
logger.warning("GnuTLS bye failed")
1819
logger.warning("GnuTLS bye failed",
1820
exc_info=error)
1510
1821
1511
1822
@staticmethod
1512
1823
def peer_certificate(session):
1568
1879
# Convert the buffer to a Python bytestring
1569
1880
fpr = ctypes.string_at(buf, buf_len.value)
1570
1881
# Convert the bytestring to hexadecimal notation
1571
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1882
hex_fpr = binascii.hexlify(fpr).upper()
1572
1883
return hex_fpr
1573
1884
1574
1885
1577
1888
def sub_process_main(self, request, address):
1578
1889
try:
1579
1890
self.finish_request(request, address)
1580
except:
1891
except Exception:
1581
1892
self.handle_error(request, address)
1582
1893
self.close_request(request)
1583
1894
1584
1895
def process_request(self, request, address):
1585
1896
"""Start a new process to process the request."""
1586
1897
proc = multiprocessing.Process(target = self.sub_process_main,
1587
args = (request,
1588
address))
1898
args = (request, address))
1589
1899
proc.start()
1590
1900
return proc
1591
1901
1606
1916
1607
1917
def add_pipe(self, parent_pipe, proc):
1608
1918
"""Dummy function; override as necessary"""
1609
raise NotImplementedError
1919
raise NotImplementedError()
1610
1920
1611
1921
1612
1922
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1619
1929
use_ipv6: Boolean; to use IPv6 or not
1620
1930
"""
1621
1931
def __init__(self, server_address, RequestHandlerClass,
1622
interface=None, use_ipv6=True):
1932
interface=None, use_ipv6=True, socketfd=None):
1933
"""If socketfd is set, use that file descriptor instead of
1934
creating a new one with socket.socket().
1935
"""
1623
1936
self.interface = interface
1624
1937
if use_ipv6:
1625
1938
self.address_family = socket.AF_INET6
1939
if socketfd is not None:
1940
# Save the file descriptor
1941
self.socketfd = socketfd
1942
# Save the original socket.socket() function
1943
self.socket_socket = socket.socket
1944
# To implement --socket, we monkey patch socket.socket.
1945
#
1946
# (When socketserver.TCPServer is a new-style class, we
1947
# could make self.socket into a property instead of monkey
1948
# patching socket.socket.)
1949
#
1950
# Create a one-time-only replacement for socket.socket()
1951
@functools.wraps(socket.socket)
1952
def socket_wrapper(*args, **kwargs):
1953
# Restore original function so subsequent calls are
1954
# not affected.
1955
socket.socket = self.socket_socket
1956
del self.socket_socket
1957
# This time only, return a new socket object from the
1958
# saved file descriptor.
1959
return socket.fromfd(self.socketfd, *args, **kwargs)
1960
# Replace socket.socket() function with wrapper
1961
socket.socket = socket_wrapper
1962
# The socketserver.TCPServer.__init__ will call
1963
# socket.socket(), which might be our replacement,
1964
# socket_wrapper(), if socketfd was set.
1626
1965
socketserver.TCPServer.__init__(self, server_address,
1627
1966
RequestHandlerClass)
1967
1628
1968
def server_bind(self):
1629
1969
"""This overrides the normal server_bind() function
1630
1970
to bind to an interface if one was specified, and also NOT to
1638
1978
try:
1639
1979
self.socket.setsockopt(socket.SOL_SOCKET,
1640
1980
SO_BINDTODEVICE,
1641
str(self.interface
1642
+ '\0'))
1981
str(self.interface + '\0'))
1643
1982
except socket.error as error:
1644
if error[0] == errno.EPERM:
1645
logger.error("No permission to"
1646
" bind to interface %s",
1647
self.interface)
1648
elif error[0] == errno.ENOPROTOOPT:
1983
if error.errno == errno.EPERM:
1984
logger.error("No permission to bind to"
1985
" interface %s", self.interface)
1986
elif error.errno == errno.ENOPROTOOPT:
1649
1987
logger.error("SO_BINDTODEVICE not available;"
1650
1988
" cannot bind to interface %s",
1651
1989
self.interface)
1990
elif error.errno == errno.ENODEV:
1991
logger.error("Interface %s does not exist,"
1992
" cannot bind", self.interface)
1652
1993
else:
1653
1994
raise
1654
1995
# Only bind(2) the socket if we really need to.
1657
1998
if self.address_family == socket.AF_INET6:
1658
1999
any_address = "::" # in6addr_any
1659
2000
else:
1660
any_address = socket.INADDR_ANY
2001
any_address = "0.0.0.0" # INADDR_ANY
1661
2002
self.server_address = (any_address,
1662
2003
self.server_address[1])
1663
2004
elif not self.server_address[1]:
1684
2025
"""
1685
2026
def __init__(self, server_address, RequestHandlerClass,
1686
2027
interface=None, use_ipv6=True, clients=None,
1687
gnutls_priority=None, use_dbus=True):
2028
gnutls_priority=None, use_dbus=True, socketfd=None):
1688
2029
self.enabled = False
1689
2030
self.clients = clients
1690
2031
if self.clients is None:
1694
2035
IPv6_TCPServer.__init__(self, server_address,
1695
2036
RequestHandlerClass,
1696
2037
interface = interface,
1697
use_ipv6 = use_ipv6)
2038
use_ipv6 = use_ipv6,
2039
socketfd = socketfd)
1698
2040
def server_activate(self):
1699
2041
if self.enabled:
1700
2042
return socketserver.TCPServer.server_activate(self)
1713
2055
1714
2056
def handle_ipc(self, source, condition, parent_pipe=None,
1715
2057
proc = None, client_object=None):
1716
condition_names = {
1717
gobject.IO_IN: "IN", # There is data to read.
1718
gobject.IO_OUT: "OUT", # Data can be written (without
1719
# blocking).
1720
gobject.IO_PRI: "PRI", # There is urgent data to read.
1721
gobject.IO_ERR: "ERR", # Error condition.
1722
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1723
# broken, usually for pipes and
1724
# sockets).
1725
}
1726
conditions_string = ' | '.join(name
1727
for cond, name in
1728
condition_names.iteritems()
1729
if cond & condition)
1730
2058
# error, or the other end of multiprocessing.Pipe has closed
1731
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2059
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1732
2060
# Wait for other process to exit
1733
2061
proc.join()
1734
2062
return False
1792
2120
return True
1793
2121
1794
2122
2123
def rfc3339_duration_to_delta(duration):
2124
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2125
2126
>>> rfc3339_duration_to_delta("P7D")
2127
datetime.timedelta(7)
2128
>>> rfc3339_duration_to_delta("PT60S")
2129
datetime.timedelta(0, 60)
2130
>>> rfc3339_duration_to_delta("PT60M")
2131
datetime.timedelta(0, 3600)
2132
>>> rfc3339_duration_to_delta("PT24H")
2133
datetime.timedelta(1)
2134
>>> rfc3339_duration_to_delta("P1W")
2135
datetime.timedelta(7)
2136
>>> rfc3339_duration_to_delta("PT5M30S")
2137
datetime.timedelta(0, 330)
2138
>>> rfc3339_duration_to_delta("P1DT3M20S")
2139
datetime.timedelta(1, 200)
2140
"""
2141
2142
# Parsing an RFC 3339 duration with regular expressions is not
2143
# possible - there would have to be multiple places for the same
2144
# values, like seconds. The current code, while more esoteric, is
2145
# cleaner without depending on a parsing library. If Python had a
2146
# built-in library for parsing we would use it, but we'd like to
2147
# avoid excessive use of external libraries.
2148
2149
# New type for defining tokens, syntax, and semantics all-in-one
2150
Token = collections.namedtuple("Token",
2151
("regexp", # To match token; if
2152
# "value" is not None,
2153
# must have a "group"
2154
# containing digits
2155
"value", # datetime.timedelta or
2156
# None
2157
"followers")) # Tokens valid after
2158
# this token
2159
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2160
# the "duration" ABNF definition in RFC 3339, Appendix A.
2161
token_end = Token(re.compile(r"$"), None, frozenset())
2162
token_second = Token(re.compile(r"(\d+)S"),
2163
datetime.timedelta(seconds=1),
2164
frozenset((token_end,)))
2165
token_minute = Token(re.compile(r"(\d+)M"),
2166
datetime.timedelta(minutes=1),
2167
frozenset((token_second, token_end)))
2168
token_hour = Token(re.compile(r"(\d+)H"),
2169
datetime.timedelta(hours=1),
2170
frozenset((token_minute, token_end)))
2171
token_time = Token(re.compile(r"T"),
2172
None,
2173
frozenset((token_hour, token_minute,
2174
token_second)))
2175
token_day = Token(re.compile(r"(\d+)D"),
2176
datetime.timedelta(days=1),
2177
frozenset((token_time, token_end)))
2178
token_month = Token(re.compile(r"(\d+)M"),
2179
datetime.timedelta(weeks=4),
2180
frozenset((token_day, token_end)))
2181
token_year = Token(re.compile(r"(\d+)Y"),
2182
datetime.timedelta(weeks=52),
2183
frozenset((token_month, token_end)))
2184
token_week = Token(re.compile(r"(\d+)W"),
2185
datetime.timedelta(weeks=1),
2186
frozenset((token_end,)))
2187
token_duration = Token(re.compile(r"P"), None,
2188
frozenset((token_year, token_month,
2189
token_day, token_time,
2190
token_week))),
2191
# Define starting values
2192
value = datetime.timedelta() # Value so far
2193
found_token = None
2194
followers = frozenset(token_duration,) # Following valid tokens
2195
s = duration # String left to parse
2196
# Loop until end token is found
2197
while found_token is not token_end:
2198
# Search for any currently valid tokens
2199
for token in followers:
2200
match = token.regexp.match(s)
2201
if match is not None:
2202
# Token found
2203
if token.value is not None:
2204
# Value found, parse digits
2205
factor = int(match.group(1), 10)
2206
# Add to value so far
2207
value += factor * token.value
2208
# Strip token from string
2209
s = token.regexp.sub("", s, 1)
2210
# Go to found token
2211
found_token = token
2212
# Set valid next tokens
2213
followers = found_token.followers
2214
break
2215
else:
2216
# No currently valid tokens were found
2217
raise ValueError("Invalid RFC 3339 duration")
2218
# End token found
2219
return value
2220
2221
1795
2222
def string_to_delta(interval):
1796
2223
"""Parse a string and return a datetime.timedelta
1797
2224
1808
2235
>>> string_to_delta('5m 30s')
1809
2236
datetime.timedelta(0, 330)
1810
2237
"""
2238
2239
try:
2240
return rfc3339_duration_to_delta(interval)
2241
except ValueError:
2242
pass
2243
1811
2244
timevalue = datetime.timedelta(0)
1812
2245
for s in interval.split():
1813
2246
try:
1824
2257
elif suffix == "w":
1825
2258
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1826
2259
else:
1827
raise ValueError("Unknown suffix %r" % suffix)
1828
except (ValueError, IndexError) as e:
2260
raise ValueError("Unknown suffix {0!r}"
2261
.format(suffix))
2262
except IndexError as e:
1829
2263
raise ValueError(*(e.args))
1830
2264
timevalue += delta
1831
2265
return timevalue
1832
2266
1833
2267
1834
def if_nametoindex(interface):
1835
"""Call the C function if_nametoindex(), or equivalent
1836
1837
Note: This function cannot accept a unicode string."""
1838
global if_nametoindex
1839
try:
1840
if_nametoindex = (ctypes.cdll.LoadLibrary
1841
(ctypes.util.find_library("c"))
1842
.if_nametoindex)
1843
except (OSError, AttributeError):
1844
logger.warning("Doing if_nametoindex the hard way")
1845
def if_nametoindex(interface):
1846
"Get an interface index the hard way, i.e. using fcntl()"
1847
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1848
with contextlib.closing(socket.socket()) as s:
1849
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1850
struct.pack(str("16s16x"),
1851
interface))
1852
interface_index = struct.unpack(str("I"),
1853
ifreq[16:20])[0]
1854
return interface_index
1855
return if_nametoindex(interface)
1856
1857
1858
2268
def daemon(nochdir = False, noclose = False):
1859
2269
"""See daemon(3). Standard BSD Unix function.
1860
2270
1868
2278
sys.exit()
1869
2279
if not noclose:
1870
2280
# Close all standard open file descriptors
1871
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2281
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1872
2282
if not stat.S_ISCHR(os.fstat(null).st_mode):
1873
2283
raise OSError(errno.ENODEV,
1874
"%s not a character device"
1875
% os.path.devnull)
2284
"{0} not a character device"
2285
.format(os.devnull))
1876
2286
os.dup2(null, sys.stdin.fileno())
1877
2287
os.dup2(null, sys.stdout.fileno())
1878
2288
os.dup2(null, sys.stderr.fileno())
1887
2297
1888
2298
parser = argparse.ArgumentParser()
1889
2299
parser.add_argument("-v", "--version", action="version",
1890
version = "%%(prog)s %s" % version,
2300
version = "%(prog)s {0}".format(version),
1891
2301
help="show version number and exit")
1892
2302
parser.add_argument("-i", "--interface", metavar="IF",
1893
2303
help="Bind to interface IF")
1899
2309
help="Run self-test")
1900
2310
parser.add_argument("--debug", action="store_true",
1901
2311
help="Debug mode; run in foreground and log"
1902
" to terminal")
2312
" to terminal", default=None)
1903
2313
parser.add_argument("--debuglevel", metavar="LEVEL",
1904
2314
help="Debug level for stdout output")
1905
2315
parser.add_argument("--priority", help="GnuTLS"
1912
2322
" files")
1913
2323
parser.add_argument("--no-dbus", action="store_false",
1914
2324
dest="use_dbus", help="Do not provide D-Bus"
1915
" system bus interface")
2325
" system bus interface", default=None)
1916
2326
parser.add_argument("--no-ipv6", action="store_false",
1917
dest="use_ipv6", help="Do not use IPv6")
2327
dest="use_ipv6", help="Do not use IPv6",
2328
default=None)
1918
2329
parser.add_argument("--no-restore", action="store_false",
1919
dest="restore", help="Do not restore old state",
1920
default=True)
1921
2330
dest="restore", help="Do not restore stored"
2331
" state", default=None)
2332
parser.add_argument("--socket", type=int,
2333
help="Specify a file descriptor to a network"
2334
" socket to use instead of creating one")
2335
parser.add_argument("--statedir", metavar="DIR",
2336
help="Directory to save/restore state in")
2337
parser.add_argument("--foreground", action="store_true",
2338
help="Run in foreground", default=None)
2339
1922
2340
options = parser.parse_args()
1923
2341
1924
2342
if options.check:
1925
2343
import doctest
1926
doctest.testmod()
1927
sys.exit()
2344
fail_count, test_count = doctest.testmod()
2345
sys.exit(os.EX_OK if fail_count == 0 else 1)
1928
2346
1929
2347
# Default values for config file for server-global settings
1930
2348
server_defaults = { "interface": "",
1932
2350
"port": "",
1933
2351
"debug": "False",
1934
2352
"priority":
1935
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2353
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1936
2354
"servicename": "Mandos",
1937
2355
"use_dbus": "True",
1938
2356
"use_ipv6": "True",
1939
2357
"debuglevel": "",
2358
"restore": "True",
2359
"socket": "",
2360
"statedir": "/var/lib/mandos",
2361
"foreground": "False",
1940
2362
}
1941
2363
1942
2364
# Parse config file for server-global settings
1947
2369
# Convert the SafeConfigParser object to a dict
1948
2370
server_settings = server_config.defaults()
1949
2371
# Use the appropriate methods on the non-string config options
1950
for option in ("debug", "use_dbus", "use_ipv6"):
2372
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1951
2373
server_settings[option] = server_config.getboolean("DEFAULT",
1952
2374
option)
1953
2375
if server_settings["port"]:
1954
2376
server_settings["port"] = server_config.getint("DEFAULT",
1955
2377
"port")
2378
if server_settings["socket"]:
2379
server_settings["socket"] = server_config.getint("DEFAULT",
2380
"socket")
2381
# Later, stdin will, and stdout and stderr might, be dup'ed
2382
# over with an opened os.devnull. But we don't want this to
2383
# happen with a supplied network socket.
2384
if 0 <= server_settings["socket"] <= 2:
2385
server_settings["socket"] = os.dup(server_settings
2386
["socket"])
1956
2387
del server_config
1957
2388
1958
2389
# Override the settings from the config file with command line
1959
2390
# options, if set.
1960
2391
for option in ("interface", "address", "port", "debug",
1961
2392
"priority", "servicename", "configdir",
1962
"use_dbus", "use_ipv6", "debuglevel", "restore"):
2393
"use_dbus", "use_ipv6", "debuglevel", "restore",
2394
"statedir", "socket", "foreground"):
1963
2395
value = getattr(options, option)
1964
2396
if value is not None:
1965
2397
server_settings[option] = value
1968
2400
for option in server_settings.keys():
1969
2401
if type(server_settings[option]) is str:
1970
2402
server_settings[option] = unicode(server_settings[option])
2403
# Force all boolean options to be boolean
2404
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2405
"foreground"):
2406
server_settings[option] = bool(server_settings[option])
2407
# Debug implies foreground
2408
if server_settings["debug"]:
2409
server_settings["foreground"] = True
1971
2410
# Now we have our good server settings in "server_settings"
1972
2411
1973
2412
##################################################################
1977
2416
debuglevel = server_settings["debuglevel"]
1978
2417
use_dbus = server_settings["use_dbus"]
1979
2418
use_ipv6 = server_settings["use_ipv6"]
2419
stored_state_path = os.path.join(server_settings["statedir"],
2420
stored_state_file)
2421
foreground = server_settings["foreground"]
2422
2423
if debug:
2424
initlogger(debug, logging.DEBUG)
2425
else:
2426
if not debuglevel:
2427
initlogger(debug)
2428
else:
2429
level = getattr(logging, debuglevel.upper())
2430
initlogger(debug, level)
1980
2431
1981
2432
if server_settings["servicename"] != "Mandos":
1982
2433
syslogger.setFormatter(logging.Formatter
1983
('Mandos (%s) [%%(process)d]:'
1984
' %%(levelname)s: %%(message)s'
1985
% server_settings["servicename"]))
2434
('Mandos ({0}) [%(process)d]:'
2435
' %(levelname)s: %(message)s'
2436
.format(server_settings
2437
["servicename"])))
1986
2438
1987
2439
# Parse config file with clients
1988
client_defaults = { "timeout": "5m",
1989
"extended_timeout": "15m",
1990
"interval": "2m",
1991
"checker": "fping -q -- %%(host)s",
1992
"host": "",
1993
"approval_delay": "0s",
1994
"approval_duration": "1s",
1995
}
1996
client_config = configparser.SafeConfigParser(client_defaults)
2440
client_config = configparser.SafeConfigParser(Client
2441
.client_defaults)
1997
2442
client_config.read(os.path.join(server_settings["configdir"],
1998
2443
"clients.conf"))
1999
2444
2008
2453
use_ipv6=use_ipv6,
2009
2454
gnutls_priority=
2010
2455
server_settings["priority"],
2011
use_dbus=use_dbus)
2012
if not debug:
2013
pidfilename = "/var/run/mandos.pid"
2456
use_dbus=use_dbus,
2457
socketfd=(server_settings["socket"]
2458
or None))
2459
if not foreground:
2460
pidfilename = "/run/mandos.pid"
2461
if not os.path.isdir("/run/."):
2462
pidfilename = "/var/run/mandos.pid"
2463
pidfile = None
2014
2464
try:
2015
2465
pidfile = open(pidfilename, "w")
2016
except IOError:
2017
logger.error("Could not open file %r", pidfilename)
2466
except IOError as e:
2467
logger.error("Could not open file %r", pidfilename,
2468
exc_info=e)
2018
2469
2019
try:
2020
uid = pwd.getpwnam("_mandos").pw_uid
2021
gid = pwd.getpwnam("_mandos").pw_gid
2022
except KeyError:
2470
for name in ("_mandos", "mandos", "nobody"):
2023
2471
try:
2024
uid = pwd.getpwnam("mandos").pw_uid
2025
gid = pwd.getpwnam("mandos").pw_gid
2472
uid = pwd.getpwnam(name).pw_uid
2473
gid = pwd.getpwnam(name).pw_gid
2474
break
2026
2475
except KeyError:
2027
try:
2028
uid = pwd.getpwnam("nobody").pw_uid
2029
gid = pwd.getpwnam("nobody").pw_gid
2030
except KeyError:
2031
uid = 65534
2032
gid = 65534
2476
continue
2477
else:
2478
uid = 65534
2479
gid = 65534
2033
2480
try:
2034
2481
os.setgid(gid)
2035
2482
os.setuid(uid)
2036
2483
except OSError as error:
2037
if error[0] != errno.EPERM:
2038
raise error
2039
2040
if not debug and not debuglevel:
2041
syslogger.setLevel(logging.WARNING)
2042
console.setLevel(logging.WARNING)
2043
if debuglevel:
2044
level = getattr(logging, debuglevel.upper())
2045
syslogger.setLevel(level)
2046
console.setLevel(level)
2484
if error.errno != errno.EPERM:
2485
raise
2047
2486
2048
2487
if debug:
2049
2488
# Enable all possible GnuTLS debugging
2060
2499
.gnutls_global_set_log_function(debug_gnutls))
2061
2500
2062
2501
# Redirect stdin so all checkers get /dev/null
2063
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2502
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2064
2503
os.dup2(null, sys.stdin.fileno())
2065
2504
if null > 2:
2066
2505
os.close(null)
2067
else:
2068
# No console logging
2069
logger.removeHandler(console)
2070
2506
2071
2507
# Need to fork before connecting to D-Bus
2072
if not debug:
2508
if not foreground:
2073
2509
# Close all input and output, do double fork, etc.
2074
2510
daemon()
2075
2511
2512
# multiprocessing will use threads, so before we use gobject we
2513
# need to inform gobject that threads will be used.
2514
gobject.threads_init()
2515
2076
2516
global main_loop
2077
2517
# From the Avahi example code
2078
DBusGMainLoop(set_as_default=True )
2518
DBusGMainLoop(set_as_default=True)
2079
2519
main_loop = gobject.MainLoop()
2080
2520
bus = dbus.SystemBus()
2081
2521
# End of Avahi example code
2087
2527
("se.bsnet.fukt.Mandos", bus,
2088
2528
do_not_queue=True))
2089
2529
except dbus.exceptions.NameExistsException as e:
2090
logger.error(unicode(e) + ", disabling D-Bus")
2530
logger.error("Disabling D-Bus:", exc_info=e)
2091
2531
use_dbus = False
2092
2532
server_settings["use_dbus"] = False
2093
2533
tcp_server.use_dbus = False
2094
2534
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2095
service = AvahiService(name = server_settings["servicename"],
2096
servicetype = "_mandos._tcp",
2097
protocol = protocol, bus = bus)
2535
service = AvahiServiceToSyslog(name =
2536
server_settings["servicename"],
2537
servicetype = "_mandos._tcp",
2538
protocol = protocol, bus = bus)
2098
2539
if server_settings["interface"]:
2099
2540
service.interface = (if_nametoindex
2100
2541
(str(server_settings["interface"])))
2104
2545
2105
2546
client_class = Client
2106
2547
if use_dbus:
2107
client_class = functools.partial(ClientDBusTransitional,
2108
bus = bus)
2109
2110
special_settings = {
2111
# Some settings need to be accessd by special methods;
2112
# booleans need .getboolean(), etc. Here is a list of them:
2113
"approved_by_default":
2114
lambda section:
2115
client_config.getboolean(section, "approved_by_default"),
2116
}
2117
# Construct a new dict of client settings of this form:
2118
# { client_name: {setting_name: value, ...}, ...}
2119
# with exceptions for any special settings as defined above
2120
client_settings = dict((clientname,
2121
dict((setting,
2122
(value if setting not in special_settings
2123
else special_settings[setting](clientname)))
2124
for setting, value in client_config.items(clientname)))
2125
for clientname in client_config.sections())
2126
2548
client_class = functools.partial(ClientDBus, bus = bus)
2549
2550
client_settings = Client.config_parser(client_config)
2127
2551
old_client_settings = {}
2128
clients_data = []
2129
2552
clients_data = {}
2553
2554
# This is used to redirect stdout and stderr for checker processes
2555
global wnull
2556
wnull = open(os.devnull, "w") # A writable /dev/null
2557
# Only used if server is running in foreground but not in debug
2558
# mode
2559
if debug or not foreground:
2560
wnull.close()
2561
2562
# Get client data and settings from last running state.
2130
2563
if server_settings["restore"]:
2131
2564
try:
2132
2565
with open(stored_state_path, "rb") as stored_state:
2133
clients_data, old_client_settings = pickle.load(stored_state)
2566
clients_data, old_client_settings = (pickle.load
2567
(stored_state))
2134
2568
os.remove(stored_state_path)
2135
2569
except IOError as e:
2136
logger.warning("Could not load persistant state: {0}".format(e))
2137
if e.errno != errno.ENOENT:
2570
if e.errno == errno.ENOENT:
2571
logger.warning("Could not load persistent state: {0}"
2572
.format(os.strerror(e.errno)))
2573
else:
2574
logger.critical("Could not load persistent state:",
2575
exc_info=e)
2138
2576
raise
2139
2140
for client in clients_data:
2141
client_name = client["name"]
2142
2143
# Decide which value to use after restoring saved state.
2144
# We have three different values: Old config file,
2145
# new config file, and saved state.
2146
# New config value takes precedence if it differs from old
2147
# config value, otherwise use saved state.
2148
for name, value in client_settings[client_name].items():
2577
except EOFError as e:
2578
logger.warning("Could not load persistent state: "
2579
"EOFError:", exc_info=e)
2580
2581
with PGPEngine() as pgp:
2582
for client_name, client in clients_data.iteritems():
2583
# Skip removed clients
2584
if client_name not in client_settings:
2585
continue
2586
2587
# Decide which value to use after restoring saved state.
2588
# We have three different values: Old config file,
2589
# new config file, and saved state.
2590
# New config value takes precedence if it differs from old
2591
# config value, otherwise use saved state.
2592
for name, value in client_settings[client_name].items():
2593
try:
2594
# For each value in new config, check if it
2595
# differs from the old config value (Except for
2596
# the "secret" attribute)
2597
if (name != "secret" and
2598
value != old_client_settings[client_name]
2599
[name]):
2600
client[name] = value
2601
except KeyError:
2602
pass
2603
2604
# Clients who has passed its expire date can still be
2605
# enabled if its last checker was successful. Clients
2606
# whose checker succeeded before we stored its state is
2607
# assumed to have successfully run all checkers during
2608
# downtime.
2609
if client["enabled"]:
2610
if datetime.datetime.utcnow() >= client["expires"]:
2611
if not client["last_checked_ok"]:
2612
logger.warning(
2613
"disabling client {0} - Client never "
2614
"performed a successful checker"
2615
.format(client_name))
2616
client["enabled"] = False
2617
elif client["last_checker_status"] != 0:
2618
logger.warning(
2619
"disabling client {0} - Client "
2620
"last checker failed with error code {1}"
2621
.format(client_name,
2622
client["last_checker_status"]))
2623
client["enabled"] = False
2624
else:
2625
client["expires"] = (datetime.datetime
2626
.utcnow()
2627
+ client["timeout"])
2628
logger.debug("Last checker succeeded,"
2629
" keeping {0} enabled"
2630
.format(client_name))
2149
2631
try:
2150
# For each value in new config, check if it differs
2151
# from the old config value (Except for the "secret"
2152
# attribute)
2153
if name != "secret" and value != old_client_settings[client_name][name]:
2154
setattr(client, name, value)
2155
except KeyError:
2156
pass
2157
2158
# Clients who has passed its expire date, can still be enabled if its
2159
# last checker was sucessful. Clients who checkers failed before we
2160
# stored it state is asumed to had failed checker during downtime.
2161
if client["enabled"] and client["last_checked_ok"]:
2162
if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2163
> client["interval"]):
2164
if client["last_checker_status"] != 0:
2165
client["enabled"] = False
2166
else:
2167
client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2168
2169
client["changedstate"] = (multiprocessing_manager
2170
.Condition(multiprocessing_manager
2171
.Lock()))
2172
if use_dbus:
2173
new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2174
tcp_server.clients[client_name] = new_client
2175
new_client.bus = bus
2176
for name, value in client.iteritems():
2177
setattr(new_client, name, value)
2178
client_object_name = unicode(client_name).translate(
2179
{ord("."): ord("_"),
2180
ord("-"): ord("_")})
2181
new_client.dbus_object_path = (dbus.ObjectPath
2182
("/clients/" + client_object_name))
2183
DBusObjectWithProperties.__init__(new_client,
2184
new_client.bus,
2185
new_client.dbus_object_path)
2186
else:
2187
tcp_server.clients[client_name] = Client.__new__(Client)
2188
for name, value in client.iteritems():
2189
setattr(tcp_server.clients[client_name], name, value)
2190
2191
tcp_server.clients[client_name].decrypt_secret(
2192
client_settings[client_name]["secret"])
2193
2194
# Create/remove clients based on new changes made to config
2195
for clientname in set(old_client_settings) - set(client_settings):
2196
del tcp_server.clients[clientname]
2197
for clientname in set(client_settings) - set(old_client_settings):
2198
tcp_server.clients[clientname] = (client_class(name = clientname,
2199
config =
2200
client_settings
2201
[clientname]))
2202
2203
2632
client["secret"] = (
2633
pgp.decrypt(client["encrypted_secret"],
2634
client_settings[client_name]
2635
["secret"]))
2636
except PGPError:
2637
# If decryption fails, we use secret from new settings
2638
logger.debug("Failed to decrypt {0} old secret"
2639
.format(client_name))
2640
client["secret"] = (
2641
client_settings[client_name]["secret"])
2642
2643
# Add/remove clients based on new changes made to config
2644
for client_name in (set(old_client_settings)
2645
- set(client_settings)):
2646
del clients_data[client_name]
2647
for client_name in (set(client_settings)
2648
- set(old_client_settings)):
2649
clients_data[client_name] = client_settings[client_name]
2650
2651
# Create all client objects
2652
for client_name, client in clients_data.iteritems():
2653
tcp_server.clients[client_name] = client_class(
2654
name = client_name, settings = client,
2655
server_settings = server_settings)
2656
2204
2657
if not tcp_server.clients:
2205
2658
logger.warning("No clients defined")
2206
2207
if not debug:
2208
try:
2209
with pidfile:
2210
pid = os.getpid()
2211
pidfile.write(str(pid) + "\n".encode("utf-8"))
2212
del pidfile
2213
except IOError:
2214
logger.error("Could not write to file %r with PID %d",
2215
pidfilename, pid)
2216
except NameError:
2217
# "pidfile" was never created
2218
pass
2659
2660
if not foreground:
2661
if pidfile is not None:
2662
try:
2663
with pidfile:
2664
pid = os.getpid()
2665
pidfile.write(str(pid) + "\n".encode("utf-8"))
2666
except IOError:
2667
logger.error("Could not write to file %r with PID %d",
2668
pidfilename, pid)
2669
del pidfile
2219
2670
del pidfilename
2220
2221
signal.signal(signal.SIGINT, signal.SIG_IGN)
2222
2671
2223
2672
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2224
2673
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2225
2674
2226
2675
if use_dbus:
2227
class MandosDBusService(dbus.service.Object):
2676
@alternate_dbus_interfaces({"se.recompile.Mandos":
2677
"se.bsnet.fukt.Mandos"})
2678
class MandosDBusService(DBusObjectWithProperties):
2228
2679
"""A D-Bus proxy object"""
2229
2680
def __init__(self):
2230
2681
dbus.service.Object.__init__(self, bus, "/")
2231
2682
_interface = "se.recompile.Mandos"
2232
2683
2684
@dbus_interface_annotations(_interface)
2685
def _foo(self):
2686
return { "org.freedesktop.DBus.Property"
2687
".EmitsChangedSignal":
2688
"false"}
2689
2233
2690
@dbus.service.signal(_interface, signature="o")
2234
2691
def ClientAdded(self, objpath):
2235
2692
"D-Bus signal"
2277
2734
2278
2735
del _interface
2279
2736
2280
class MandosDBusServiceTransitional(MandosDBusService):
2281
__metaclass__ = AlternateDBusNamesMetaclass
2282
mandos_dbus_service = MandosDBusServiceTransitional()
2737
mandos_dbus_service = MandosDBusService()
2283
2738
2284
2739
def cleanup():
2285
2740
"Cleanup function; run on exit"
2286
2741
service.cleanup()
2287
2742
2288
2743
multiprocessing.active_children()
2744
wnull.close()
2289
2745
if not (tcp_server.clients or client_settings):
2290
2746
return
2291
2292
# Store client before exiting. Secrets are encrypted with key based
2293
# on what config file has. If config file is removed/edited, old
2294
# secret will thus be unrecovable.
2295
clients = []
2296
for client in tcp_server.clients.itervalues():
2297
client.encrypt_secret(client_settings[client.name]["secret"])
2298
2299
client_dict = {}
2300
2301
# A list of attributes that will not be stored when shuting down.
2302
exclude = set(("bus", "changedstate", "secret"))
2303
for name, typ in inspect.getmembers(dbus.service.Object):
2304
exclude.add(name)
2305
2306
client_dict["encrypted_secret"] = client.encrypted_secret
2307
for attr in client.client_structure:
2308
if attr not in exclude:
2309
client_dict[attr] = getattr(client, attr)
2310
2311
clients.append(client_dict)
2312
del client_settings[client.name]["secret"]
2313
2747
2748
# Store client before exiting. Secrets are encrypted with key
2749
# based on what config file has. If config file is
2750
# removed/edited, old secret will thus be unrecovable.
2751
clients = {}
2752
with PGPEngine() as pgp:
2753
for client in tcp_server.clients.itervalues():
2754
key = client_settings[client.name]["secret"]
2755
client.encrypted_secret = pgp.encrypt(client.secret,
2756
key)
2757
client_dict = {}
2758
2759
# A list of attributes that can not be pickled
2760
# + secret.
2761
exclude = set(("bus", "changedstate", "secret",
2762
"checker", "server_settings"))
2763
for name, typ in (inspect.getmembers
2764
(dbus.service.Object)):
2765
exclude.add(name)
2766
2767
client_dict["encrypted_secret"] = (client
2768
.encrypted_secret)
2769
for attr in client.client_structure:
2770
if attr not in exclude:
2771
client_dict[attr] = getattr(client, attr)
2772
2773
clients[client.name] = client_dict
2774
del client_settings[client.name]["secret"]
2775
2314
2776
try:
2315
with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2777
with (tempfile.NamedTemporaryFile
2778
(mode='wb', suffix=".pickle", prefix='clients-',
2779
dir=os.path.dirname(stored_state_path),
2780
delete=False)) as stored_state:
2316
2781
pickle.dump((clients, client_settings), stored_state)
2317
except IOError as e:
2318
logger.warning("Could not save persistant state: {0}".format(e))
2319
if e.errno != errno.ENOENT:
2782
tempname=stored_state.name
2783
os.rename(tempname, stored_state_path)
2784
except (IOError, OSError) as e:
2785
if not debug:
2786
try:
2787
os.remove(tempname)
2788
except NameError:
2789
pass
2790
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2791
logger.warning("Could not save persistent state: {0}"
2792
.format(os.strerror(e.errno)))
2793
else:
2794
logger.warning("Could not save persistent state:",
2795
exc_info=e)
2320
2796
raise
2321
2797
2322
2798
# Delete all clients, and settings from config
2323
2799
while tcp_server.clients:
2324
2800
name, client = tcp_server.clients.popitem()
2329
2805
if use_dbus:
2330
2806
# Emit D-Bus signal
2331
2807
mandos_dbus_service.ClientRemoved(client
2332
.dbus_object_path,
2333
client.name)
2808
.dbus_object_path,
2809
client.name)
2334
2810
client_settings.clear()
2335
2811
2336
2812
atexit.register(cleanup)
2342
2818
# Need to initiate checking of clients
2343
2819
if client.enabled:
2344
2820
client.init_checker()
2345
2346
2821
2347
2822
tcp_server.enable()
2348
2823
tcp_server.server_activate()
2351
2826
service.port = tcp_server.socket.getsockname()[1]
2352
2827
if use_ipv6:
2353
2828
logger.info("Now listening on address %r, port %d,"
2354
" flowinfo %d, scope_id %d"
2355
% tcp_server.socket.getsockname())
2829
" flowinfo %d, scope_id %d",
2830
*tcp_server.socket.getsockname())
2356
2831
else: # IPv4
2357
logger.info("Now listening on address %r, port %d"
2358
% tcp_server.socket.getsockname())
2832
logger.info("Now listening on address %r, port %d",
2833
*tcp_server.socket.getsockname())
2359
2834
2360
2835
#service.interface = tcp_server.socket.getsockname()[3]
2361
2836
2364
2839
try:
2365
2840
service.activate()
2366
2841
except dbus.exceptions.DBusException as error:
2367
logger.critical("DBusException: %s", error)
2842
logger.critical("D-Bus Exception", exc_info=error)
2368
2843
cleanup()
2369
2844
sys.exit(1)
2370
2845
# End of Avahi example code
2377
2852
logger.debug("Starting main loop")
2378
2853
main_loop.run()
2379
2854
except AvahiError as error:
2380
logger.critical("AvahiError: %s", error)
2855
logger.critical("Avahi Error", exc_info=error)
2381
2856
cleanup()
2382
2857
sys.exit(1)
2383
2858
except KeyboardInterrupt:
2388
2863
# Must run before the D-Bus bus name gets deregistered
2389
2864
cleanup()
2390
2865
2391
2392
2866
if __name__ == '__main__':
2393
2867
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0