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- Committer: Björn Påhlsson
- Date: 2011-11-09 17:16:03 UTC
- mfrom: (518.1.1 mandos-persistent)
- Revision ID: belorn@fukt.bsnet.se-20111109171603-srz21uoclpldp5ve
merge persistent state
- files removed:
- network-hooks.d
- files modified:
- DBUS-API
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
16
#
17
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
39
37
import SocketServer as socketserver
40
38
import socket
41
39
import argparse
65
63
import cPickle as pickle
66
64
import multiprocessing
67
65
import types
68
import binascii
69
import tempfile
70
import itertools
66
import hashlib
71
67
72
68
import dbus
73
69
import dbus.service
78
74
import ctypes.util
79
75
import xml.dom.minidom
80
76
import inspect
81
import GnuPGInterface
77
import Crypto.Cipher.AES
82
78
83
79
try:
84
80
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
88
84
except ImportError:
89
85
SO_BINDTODEVICE = None
90
86
91
version = "1.5.3"
92
stored_state_file = "clients.pickle"
87
88
version = "1.4.1"
93
89
94
90
logger = logging.getLogger()
91
stored_state_path = "/var/lib/mandos/clients.pickle"
92
95
93
syslogger = (logging.handlers.SysLogHandler
96
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
97
95
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
96
syslogger.setFormatter(logging.Formatter
97
('Mandos [%(process)d]: %(levelname)s:'
98
' %(message)s'))
99
logger.addHandler(syslogger)
100
101
console = logging.StreamHandler()
102
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
103
' [%(process)d]:'
104
' %(levelname)s:'
105
' %(message)s'))
106
logger.addHandler(console)
212
107
213
108
214
109
class AvahiError(Exception):
245
140
server: D-Bus Server
246
141
bus: dbus.SystemBus()
247
142
"""
248
249
143
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
250
144
servicetype = None, port = None, TXT = None,
251
145
domain = "", host = "", max_renames = 32768,
264
158
self.server = None
265
159
self.bus = bus
266
160
self.entry_group_state_changed_match = None
267
268
161
def rename(self):
269
162
"""Derived from the Avahi example code"""
270
163
if self.rename_count >= self.max_renames:
280
173
try:
281
174
self.add()
282
175
except dbus.exceptions.DBusException as error:
283
logger.critical("D-Bus Exception", exc_info=error)
176
logger.critical("DBusException: %s", error)
284
177
self.cleanup()
285
178
os._exit(1)
286
179
self.rename_count += 1
287
288
180
def remove(self):
289
181
"""Derived from the Avahi example code"""
290
182
if self.entry_group_state_changed_match is not None:
292
184
self.entry_group_state_changed_match = None
293
185
if self.group is not None:
294
186
self.group.Reset()
295
296
187
def add(self):
297
188
"""Derived from the Avahi example code"""
298
189
self.remove()
315
206
dbus.UInt16(self.port),
316
207
avahi.string_array_to_txt_array(self.TXT))
317
208
self.group.Commit()
318
319
209
def entry_group_state_changed(self, state, error):
320
210
"""Derived from the Avahi example code"""
321
211
logger.debug("Avahi entry group state change: %i", state)
328
218
elif state == avahi.ENTRY_GROUP_FAILURE:
329
219
logger.critical("Avahi: Error in group state changed %s",
330
220
unicode(error))
331
raise AvahiGroupError("State changed: {0!s}"
332
.format(error))
333
221
raise AvahiGroupError("State changed: %s"
222
% unicode(error))
334
223
def cleanup(self):
335
224
"""Derived from the Avahi example code"""
336
225
if self.group is not None:
337
226
try:
338
227
self.group.Free()
339
228
except (dbus.exceptions.UnknownMethodException,
340
dbus.exceptions.DBusException):
229
dbus.exceptions.DBusException) as e:
341
230
pass
342
231
self.group = None
343
232
self.remove()
344
345
233
def server_state_changed(self, state, error=None):
346
234
"""Derived from the Avahi example code"""
347
235
logger.debug("Avahi server state change: %i", state)
366
254
logger.debug("Unknown state: %r", state)
367
255
else:
368
256
logger.debug("Unknown state: %r: %r", state, error)
369
370
257
def activate(self):
371
258
"""Derived from the Avahi example code"""
372
259
if self.server is None:
384
271
"""Add the new name to the syslog messages"""
385
272
ret = AvahiService.rename(self)
386
273
syslogger.setFormatter(logging.Formatter
387
('Mandos ({0}) [%(process)d]:'
388
' %(levelname)s: %(message)s'
389
.format(self.name)))
274
('Mandos (%s) [%%(process)d]:'
275
' %%(levelname)s: %%(message)s'
276
% self.name))
390
277
return ret
391
278
392
def timedelta_to_milliseconds(td):
279
def _timedelta_to_milliseconds(td):
393
280
"Convert a datetime.timedelta() to milliseconds"
394
281
return ((td.days * 24 * 60 * 60 * 1000)
395
282
+ (td.seconds * 1000)
396
283
+ (td.microseconds // 1000))
397
284
398
285
class Client(object):
399
286
"""A representation of a client host served by this server.
400
287
401
288
Attributes:
402
approved: bool(); 'None' if not yet approved/disapproved
289
_approved: bool(); 'None' if not yet approved/disapproved
403
290
approval_delay: datetime.timedelta(); Time to wait for approval
404
291
approval_duration: datetime.timedelta(); Duration of one approval
405
292
checker: subprocess.Popen(); a running checker process used
423
310
interval: datetime.timedelta(); How often to start a new checker
424
311
last_approval_request: datetime.datetime(); (UTC) or None
425
312
last_checked_ok: datetime.datetime(); (UTC) or None
426
last_checker_status: integer between 0 and 255 reflecting exit
427
status of last checker. -1 reflects crashed
428
checker, -2 means no checker completed yet.
429
last_enabled: datetime.datetime(); (UTC) or None
313
last_checker_status: integer between 0 and 255 reflecting exit status
314
of last checker. -1 reflect crashed checker,
315
or None.
316
last_enabled: datetime.datetime(); (UTC)
430
317
name: string; from the config file, used in log messages and
431
318
D-Bus identifiers
432
319
secret: bytestring; sent verbatim (over TLS) to client
433
320
timeout: datetime.timedelta(); How long from last_checked_ok
434
321
until this client is disabled
435
extended_timeout: extra long timeout when secret has been sent
322
extended_timeout: extra long timeout when password has been sent
436
323
runtime_expansions: Allowed attributes for runtime expansion.
437
324
expires: datetime.datetime(); time (UTC) when a client will be
438
325
disabled, or None
442
329
"created", "enabled", "fingerprint",
443
330
"host", "interval", "last_checked_ok",
444
331
"last_enabled", "name", "timeout")
445
client_defaults = { "timeout": "5m",
446
"extended_timeout": "15m",
447
"interval": "2m",
448
"checker": "fping -q -- %%(host)s",
449
"host": "",
450
"approval_delay": "0s",
451
"approval_duration": "1s",
452
"approved_by_default": "True",
453
"enabled": "True",
454
}
455
332
456
333
def timeout_milliseconds(self):
457
334
"Return the 'timeout' attribute in milliseconds"
458
return timedelta_to_milliseconds(self.timeout)
335
return _timedelta_to_milliseconds(self.timeout)
459
336
460
337
def extended_timeout_milliseconds(self):
461
338
"Return the 'extended_timeout' attribute in milliseconds"
462
return timedelta_to_milliseconds(self.extended_timeout)
339
return _timedelta_to_milliseconds(self.extended_timeout)
463
340
464
341
def interval_milliseconds(self):
465
342
"Return the 'interval' attribute in milliseconds"
466
return timedelta_to_milliseconds(self.interval)
343
return _timedelta_to_milliseconds(self.interval)
467
344
468
345
def approval_delay_milliseconds(self):
469
return timedelta_to_milliseconds(self.approval_delay)
470
471
@staticmethod
472
def config_parser(config):
473
"""Construct a new dict of client settings of this form:
474
{ client_name: {setting_name: value, ...}, ...}
475
with exceptions for any special settings as defined above.
476
NOTE: Must be a pure function. Must return the same result
477
value given the same arguments.
478
"""
479
settings = {}
480
for client_name in config.sections():
481
section = dict(config.items(client_name))
482
client = settings[client_name] = {}
483
484
client["host"] = section["host"]
485
# Reformat values from string types to Python types
486
client["approved_by_default"] = config.getboolean(
487
client_name, "approved_by_default")
488
client["enabled"] = config.getboolean(client_name,
489
"enabled")
490
491
client["fingerprint"] = (section["fingerprint"].upper()
492
.replace(" ", ""))
493
if "secret" in section:
494
client["secret"] = section["secret"].decode("base64")
495
elif "secfile" in section:
496
with open(os.path.expanduser(os.path.expandvars
497
(section["secfile"])),
498
"rb") as secfile:
499
client["secret"] = secfile.read()
500
else:
501
raise TypeError("No secret or secfile for section {0}"
502
.format(section))
503
client["timeout"] = string_to_delta(section["timeout"])
504
client["extended_timeout"] = string_to_delta(
505
section["extended_timeout"])
506
client["interval"] = string_to_delta(section["interval"])
507
client["approval_delay"] = string_to_delta(
508
section["approval_delay"])
509
client["approval_duration"] = string_to_delta(
510
section["approval_duration"])
511
client["checker_command"] = section["checker"]
512
client["last_approval_request"] = None
513
client["last_checked_ok"] = None
514
client["last_checker_status"] = -2
515
516
return settings
517
518
def __init__(self, settings, name = None):
346
return _timedelta_to_milliseconds(self.approval_delay)
347
348
def __init__(self, name = None, config=None):
349
"""Note: the 'checker' key in 'config' sets the
350
'checker_command' attribute and *not* the 'checker'
351
attribute."""
519
352
self.name = name
520
# adding all client settings
521
for setting, value in settings.iteritems():
522
setattr(self, setting, value)
523
524
if self.enabled:
525
if not hasattr(self, "last_enabled"):
526
self.last_enabled = datetime.datetime.utcnow()
527
if not hasattr(self, "expires"):
528
self.expires = (datetime.datetime.utcnow()
529
+ self.timeout)
530
else:
531
self.last_enabled = None
532
self.expires = None
533
353
if config is None:
354
config = {}
534
355
logger.debug("Creating client %r", self.name)
535
356
# Uppercase and remove spaces from fingerprint for later
536
357
# comparison purposes with return value from the fingerprint()
537
358
# function
359
self.fingerprint = (config["fingerprint"].upper()
360
.replace(" ", ""))
538
361
logger.debug(" Fingerprint: %s", self.fingerprint)
539
self.created = settings.get("created",
540
datetime.datetime.utcnow())
541
542
# attributes specific for this server instance
362
if "secret" in config:
363
self.secret = config["secret"].decode("base64")
364
elif "secfile" in config:
365
with open(os.path.expanduser(os.path.expandvars
366
(config["secfile"])),
367
"rb") as secfile:
368
self.secret = secfile.read()
369
else:
370
raise TypeError("No secret or secfile for client %s"
371
% self.name)
372
self.host = config.get("host", "")
373
self.created = datetime.datetime.utcnow()
374
self.enabled = True
375
self.last_approval_request = None
376
self.last_enabled = datetime.datetime.utcnow()
377
self.last_checked_ok = None
378
self.last_checker_status = None
379
self.timeout = string_to_delta(config["timeout"])
380
self.extended_timeout = string_to_delta(config
381
["extended_timeout"])
382
self.interval = string_to_delta(config["interval"])
543
383
self.checker = None
544
384
self.checker_initiator_tag = None
545
385
self.disable_initiator_tag = None
386
self.expires = datetime.datetime.utcnow() + self.timeout
546
387
self.checker_callback_tag = None
388
self.checker_command = config["checker"]
547
389
self.current_checker_command = None
548
self.approved = None
390
self._approved = None
391
self.approved_by_default = config.get("approved_by_default",
392
True)
549
393
self.approvals_pending = 0
394
self.approval_delay = string_to_delta(
395
config["approval_delay"])
396
self.approval_duration = string_to_delta(
397
config["approval_duration"])
550
398
self.changedstate = (multiprocessing_manager
551
399
.Condition(multiprocessing_manager
552
400
.Lock()))
553
self.client_structure = [attr for attr in
554
self.__dict__.iterkeys()
555
if not attr.startswith("_")]
401
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
556
402
self.client_structure.append("client_structure")
557
403
404
558
405
for name, t in inspect.getmembers(type(self),
559
lambda obj:
560
isinstance(obj,
561
property)):
406
lambda obj: isinstance(obj, property)):
562
407
if not name.startswith("_"):
563
408
self.client_structure.append(name)
564
409
572
417
if getattr(self, "enabled", False):
573
418
# Already enabled
574
419
return
420
self.send_changedstate()
575
421
self.expires = datetime.datetime.utcnow() + self.timeout
576
422
self.enabled = True
577
423
self.last_enabled = datetime.datetime.utcnow()
578
424
self.init_checker()
579
self.send_changedstate()
580
425
581
426
def disable(self, quiet=True):
582
427
"""Disable this client."""
583
428
if not getattr(self, "enabled", False):
584
429
return False
585
430
if not quiet:
431
self.send_changedstate()
432
if not quiet:
586
433
logger.info("Disabling client %s", self.name)
587
if getattr(self, "disable_initiator_tag", None) is not None:
434
if getattr(self, "disable_initiator_tag", False):
588
435
gobject.source_remove(self.disable_initiator_tag)
589
436
self.disable_initiator_tag = None
590
437
self.expires = None
591
if getattr(self, "checker_initiator_tag", None) is not None:
438
if getattr(self, "checker_initiator_tag", False):
592
439
gobject.source_remove(self.checker_initiator_tag)
593
440
self.checker_initiator_tag = None
594
441
self.stop_checker()
595
442
self.enabled = False
596
if not quiet:
597
self.send_changedstate()
598
443
# Do not run this again if called by a gobject.timeout_add
599
444
return False
600
445
601
446
def __del__(self):
602
447
self.disable()
603
448
604
449
def init_checker(self):
605
450
# Schedule a new checker to be started an 'interval' from now,
606
451
# and every interval from then on.
607
if self.checker_initiator_tag is not None:
608
gobject.source_remove(self.checker_initiator_tag)
609
452
self.checker_initiator_tag = (gobject.timeout_add
610
453
(self.interval_milliseconds(),
611
454
self.start_checker))
612
455
# Schedule a disable() when 'timeout' has passed
613
if self.disable_initiator_tag is not None:
614
gobject.source_remove(self.disable_initiator_tag)
615
456
self.disable_initiator_tag = (gobject.timeout_add
616
457
(self.timeout_milliseconds(),
617
458
self.disable))
618
459
# Also start a new checker *right now*.
619
460
self.start_checker()
620
461
462
621
463
def checker_callback(self, pid, condition, command):
622
464
"""The checker has completed, so take appropriate actions."""
623
465
self.checker_callback_tag = None
624
466
self.checker = None
625
467
if os.WIFEXITED(condition):
626
self.last_checker_status = os.WEXITSTATUS(condition)
468
self.last_checker_status = os.WEXITSTATUS(condition)
627
469
if self.last_checker_status == 0:
628
470
logger.info("Checker for %(name)s succeeded",
629
471
vars(self))
636
478
logger.warning("Checker for %(name)s crashed?",
637
479
vars(self))
638
480
639
def checked_ok(self):
640
"""Assert that the client has been seen, alive and well."""
641
self.last_checked_ok = datetime.datetime.utcnow()
642
self.last_checker_status = 0
643
self.bump_timeout()
644
645
def bump_timeout(self, timeout=None):
646
"""Bump up the timeout for this client."""
481
def checked_ok(self, timeout=None):
482
"""Bump up the timeout for this client.
483
484
This should only be called when the client has been seen,
485
alive and well.
486
"""
647
487
if timeout is None:
648
488
timeout = self.timeout
489
self.last_checked_ok = datetime.datetime.utcnow()
649
490
if self.disable_initiator_tag is not None:
650
491
gobject.source_remove(self.disable_initiator_tag)
651
self.disable_initiator_tag = None
652
492
if getattr(self, "enabled", False):
653
493
self.disable_initiator_tag = (gobject.timeout_add
654
(timedelta_to_milliseconds
494
(_timedelta_to_milliseconds
655
495
(timeout), self.disable))
656
496
self.expires = datetime.datetime.utcnow() + timeout
657
497
664
504
If a checker already exists, leave it running and do
665
505
nothing."""
666
506
# The reason for not killing a running checker is that if we
667
# did that, and if a checker (for some reason) started running
668
# slowly and taking more than 'interval' time, then the client
669
# would inevitably timeout, since no checker would get a
670
# chance to run to completion. If we instead leave running
507
# did that, then if a checker (for some reason) started
508
# running slowly and taking more than 'interval' time, the
509
# client would inevitably timeout, since no checker would get
510
# a chance to run to completion. If we instead leave running
671
511
# checkers alone, the checker would have to take more time
672
512
# than 'timeout' for the client to be disabled, which is as it
673
513
# should be.
703
543
try:
704
544
command = self.checker_command % escaped_attrs
705
545
except TypeError as error:
706
logger.error('Could not format string "%s"',
707
self.checker_command, exc_info=error)
546
logger.error('Could not format string "%s":'
547
' %s', self.checker_command, error)
708
548
return True # Try again later
709
549
self.current_checker_command = command
710
550
try:
728
568
gobject.source_remove(self.checker_callback_tag)
729
569
self.checker_callback(pid, status, command)
730
570
except OSError as error:
731
logger.error("Failed to start subprocess",
732
exc_info=error)
571
logger.error("Failed to start subprocess: %s",
572
error)
733
573
# Re-run this periodically if run by gobject.timeout_add
734
574
return True
735
575
742
582
return
743
583
logger.debug("Stopping checker for %(name)s", vars(self))
744
584
try:
745
self.checker.terminate()
585
os.kill(self.checker.pid, signal.SIGTERM)
746
586
#time.sleep(0.5)
747
587
#if self.checker.poll() is None:
748
# self.checker.kill()
588
# os.kill(self.checker.pid, signal.SIGKILL)
749
589
except OSError as error:
750
590
if error.errno != errno.ESRCH: # No such process
751
591
raise
752
592
self.checker = None
753
593
594
# Encrypts a client secret and stores it in a varible encrypted_secret
595
def encrypt_secret(self, key):
596
# Encryption-key need to be of a specific size, so we hash inputed key
597
hasheng = hashlib.sha256()
598
hasheng.update(key)
599
encryptionkey = hasheng.digest()
600
601
# Create validation hash so we know at decryption if it was sucessful
602
hasheng = hashlib.sha256()
603
hasheng.update(self.secret)
604
validationhash = hasheng.digest()
605
606
# Encrypt secret
607
iv = os.urandom(Crypto.Cipher.AES.block_size)
608
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
609
Crypto.Cipher.AES.MODE_CFB, iv)
610
ciphertext = ciphereng.encrypt(validationhash+self.secret)
611
self.encrypted_secret = (ciphertext, iv)
612
613
# Decrypt a encrypted client secret
614
def decrypt_secret(self, key):
615
# Decryption-key need to be of a specific size, so we hash inputed key
616
hasheng = hashlib.sha256()
617
hasheng.update(key)
618
encryptionkey = hasheng.digest()
619
620
# Decrypt encrypted secret
621
ciphertext, iv = self.encrypted_secret
622
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
623
Crypto.Cipher.AES.MODE_CFB, iv)
624
plain = ciphereng.decrypt(ciphertext)
625
626
# Validate decrypted secret to know if it was succesful
627
hasheng = hashlib.sha256()
628
validationhash = plain[:hasheng.digest_size]
629
secret = plain[hasheng.digest_size:]
630
hasheng.update(secret)
631
632
# if validation fails, we use key as new secret. Otherwhise, we use
633
# the decrypted secret
634
if hasheng.digest() == validationhash:
635
self.secret = secret
636
else:
637
self.secret = key
638
del self.encrypted_secret
639
754
640
755
641
def dbus_service_property(dbus_interface, signature="v",
756
642
access="readwrite", byte_arrays=False):
768
654
# "Set" method, so we fail early here:
769
655
if byte_arrays and signature != "ay":
770
656
raise ValueError("Byte arrays not supported for non-'ay'"
771
" signature {0!r}".format(signature))
657
" signature %r" % signature)
772
658
def decorator(func):
773
659
func._dbus_is_property = True
774
660
func._dbus_interface = dbus_interface
782
668
return decorator
783
669
784
670
785
def dbus_interface_annotations(dbus_interface):
786
"""Decorator for marking functions returning interface annotations
787
788
Usage:
789
790
@dbus_interface_annotations("org.example.Interface")
791
def _foo(self): # Function name does not matter
792
return {"org.freedesktop.DBus.Deprecated": "true",
793
"org.freedesktop.DBus.Property.EmitsChangedSignal":
794
"false"}
795
"""
796
def decorator(func):
797
func._dbus_is_interface = True
798
func._dbus_interface = dbus_interface
799
func._dbus_name = dbus_interface
800
return func
801
return decorator
802
803
804
def dbus_annotations(annotations):
805
"""Decorator to annotate D-Bus methods, signals or properties
806
Usage:
807
808
@dbus_service_property("org.example.Interface", signature="b",
809
access="r")
810
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
811
"org.freedesktop.DBus.Property."
812
"EmitsChangedSignal": "false"})
813
def Property_dbus_property(self):
814
return dbus.Boolean(False)
815
"""
816
def decorator(func):
817
func._dbus_annotations = annotations
818
return func
819
return decorator
820
821
822
671
class DBusPropertyException(dbus.exceptions.DBusException):
823
672
"""A base class for D-Bus property-related exceptions
824
673
"""
847
696
"""
848
697
849
698
@staticmethod
850
def _is_dbus_thing(thing):
851
"""Returns a function testing if an attribute is a D-Bus thing
852
853
If called like _is_dbus_thing("method") it returns a function
854
suitable for use as predicate to inspect.getmembers().
855
"""
856
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
857
False)
699
def _is_dbus_property(obj):
700
return getattr(obj, "_dbus_is_property", False)
858
701
859
def _get_all_dbus_things(self, thing):
702
def _get_all_dbus_properties(self):
860
703
"""Returns a generator of (name, attribute) pairs
861
704
"""
862
return ((getattr(athing.__get__(self), "_dbus_name",
863
name),
864
athing.__get__(self))
705
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
865
706
for cls in self.__class__.__mro__
866
for name, athing in
867
inspect.getmembers(cls,
868
self._is_dbus_thing(thing)))
707
for name, prop in
708
inspect.getmembers(cls, self._is_dbus_property))
869
709
870
710
def _get_dbus_property(self, interface_name, property_name):
871
711
"""Returns a bound method if one exists which is a D-Bus
873
713
"""
874
714
for cls in self.__class__.__mro__:
875
715
for name, value in (inspect.getmembers
876
(cls,
877
self._is_dbus_thing("property"))):
716
(cls, self._is_dbus_property)):
878
717
if (value._dbus_name == property_name
879
718
and value._dbus_interface == interface_name):
880
719
return value.__get__(self)
909
748
# signatures other than "ay".
910
749
if prop._dbus_signature != "ay":
911
750
raise ValueError
912
value = dbus.ByteArray(b''.join(chr(byte)
913
for byte in value))
751
value = dbus.ByteArray(''.join(unichr(byte)
752
for byte in value))
914
753
prop(value)
915
754
916
755
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
921
760
922
761
Note: Will not include properties with access="write".
923
762
"""
924
properties = {}
925
for name, prop in self._get_all_dbus_things("property"):
763
all = {}
764
for name, prop in self._get_all_dbus_properties():
926
765
if (interface_name
927
766
and interface_name != prop._dbus_interface):
928
767
# Interface non-empty but did not match
932
771
continue
933
772
value = prop()
934
773
if not hasattr(value, "variant_level"):
935
properties[name] = value
774
all[name] = value
936
775
continue
937
properties[name] = type(value)(value, variant_level=
938
value.variant_level+1)
939
return dbus.Dictionary(properties, signature="sv")
776
all[name] = type(value)(value, variant_level=
777
value.variant_level+1)
778
return dbus.Dictionary(all, signature="sv")
940
779
941
780
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
942
781
out_signature="s",
943
782
path_keyword='object_path',
944
783
connection_keyword='connection')
945
784
def Introspect(self, object_path, connection):
946
"""Overloading of standard D-Bus method.
947
948
Inserts property tags and interface annotation tags.
785
"""Standard D-Bus method, overloaded to insert property tags.
949
786
"""
950
787
xmlstring = dbus.service.Object.Introspect(self, object_path,
951
788
connection)
958
795
e.setAttribute("access", prop._dbus_access)
959
796
return e
960
797
for if_tag in document.getElementsByTagName("interface"):
961
# Add property tags
962
798
for tag in (make_tag(document, name, prop)
963
799
for name, prop
964
in self._get_all_dbus_things("property")
800
in self._get_all_dbus_properties()
965
801
if prop._dbus_interface
966
802
== if_tag.getAttribute("name")):
967
803
if_tag.appendChild(tag)
968
# Add annotation tags
969
for typ in ("method", "signal", "property"):
970
for tag in if_tag.getElementsByTagName(typ):
971
annots = dict()
972
for name, prop in (self.
973
_get_all_dbus_things(typ)):
974
if (name == tag.getAttribute("name")
975
and prop._dbus_interface
976
== if_tag.getAttribute("name")):
977
annots.update(getattr
978
(prop,
979
"_dbus_annotations",
980
{}))
981
for name, value in annots.iteritems():
982
ann_tag = document.createElement(
983
"annotation")
984
ann_tag.setAttribute("name", name)
985
ann_tag.setAttribute("value", value)
986
tag.appendChild(ann_tag)
987
# Add interface annotation tags
988
for annotation, value in dict(
989
itertools.chain.from_iterable(
990
annotations().iteritems()
991
for name, annotations in
992
self._get_all_dbus_things("interface")
993
if name == if_tag.getAttribute("name")
994
)).iteritems():
995
ann_tag = document.createElement("annotation")
996
ann_tag.setAttribute("name", annotation)
997
ann_tag.setAttribute("value", value)
998
if_tag.appendChild(ann_tag)
999
804
# Add the names to the return values for the
1000
805
# "org.freedesktop.DBus.Properties" methods
1001
806
if (if_tag.getAttribute("name")
1016
821
except (AttributeError, xml.dom.DOMException,
1017
822
xml.parsers.expat.ExpatError) as error:
1018
823
logger.error("Failed to override Introspection method",
1019
exc_info=error)
824
error)
1020
825
return xmlstring
1021
826
1022
827
1027
832
return dbus.String(dt.isoformat(),
1028
833
variant_level=variant_level)
1029
834
1030
1031
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1032
"""A class decorator; applied to a subclass of
1033
dbus.service.Object, it will add alternate D-Bus attributes with
1034
interface names according to the "alt_interface_names" mapping.
1035
Usage:
1036
1037
@alternate_dbus_names({"org.example.Interface":
1038
"net.example.AlternateInterface"})
1039
class SampleDBusObject(dbus.service.Object):
1040
@dbus.service.method("org.example.Interface")
1041
def SampleDBusMethod():
1042
pass
1043
1044
The above "SampleDBusMethod" on "SampleDBusObject" will be
1045
reachable via two interfaces: "org.example.Interface" and
1046
"net.example.AlternateInterface", the latter of which will have
1047
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1048
"true", unless "deprecate" is passed with a False value.
1049
1050
This works for methods and signals, and also for D-Bus properties
1051
(from DBusObjectWithProperties) and interfaces (from the
1052
dbus_interface_annotations decorator).
835
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
836
.__metaclass__):
837
"""Applied to an empty subclass of a D-Bus object, this metaclass
838
will add additional D-Bus attributes matching a certain pattern.
1053
839
"""
1054
def wrapper(cls):
1055
for orig_interface_name, alt_interface_name in (
1056
alt_interface_names.iteritems()):
1057
attr = {}
1058
interface_names = set()
1059
# Go though all attributes of the class
1060
for attrname, attribute in inspect.getmembers(cls):
840
def __new__(mcs, name, bases, attr):
841
# Go through all the base classes which could have D-Bus
842
# methods, signals, or properties in them
843
for base in (b for b in bases
844
if issubclass(b, dbus.service.Object)):
845
# Go though all attributes of the base class
846
for attrname, attribute in inspect.getmembers(base):
1061
847
# Ignore non-D-Bus attributes, and D-Bus attributes
1062
848
# with the wrong interface name
1063
849
if (not hasattr(attribute, "_dbus_interface")
1064
850
or not attribute._dbus_interface
1065
.startswith(orig_interface_name)):
851
.startswith("se.recompile.Mandos")):
1066
852
continue
1067
853
# Create an alternate D-Bus interface name based on
1068
854
# the current name
1069
855
alt_interface = (attribute._dbus_interface
1070
.replace(orig_interface_name,
1071
alt_interface_name))
1072
interface_names.add(alt_interface)
856
.replace("se.recompile.Mandos",
857
"se.bsnet.fukt.Mandos"))
1073
858
# Is this a D-Bus signal?
1074
859
if getattr(attribute, "_dbus_is_signal", False):
1075
860
# Extract the original non-method function by
1090
875
nonmethod_func.func_name,
1091
876
nonmethod_func.func_defaults,
1092
877
nonmethod_func.func_closure)))
1093
# Copy annotations, if any
1094
try:
1095
new_function._dbus_annotations = (
1096
dict(attribute._dbus_annotations))
1097
except AttributeError:
1098
pass
1099
878
# Define a creator of a function to call both the
1100
# original and alternate functions, so both the
1101
# original and alternate signals gets sent when
1102
# the function is called
879
# old and new functions, so both the old and new
880
# signals gets sent when the function is called
1103
881
def fixscope(func1, func2):
1104
882
"""This function is a scope container to pass
1105
883
func1 and func2 to the "call_both" function
1112
890
return call_both
1113
891
# Create the "call_both" function and add it to
1114
892
# the class
1115
attr[attrname] = fixscope(attribute, new_function)
893
attr[attrname] = fixscope(attribute,
894
new_function)
1116
895
# Is this a D-Bus method?
1117
896
elif getattr(attribute, "_dbus_is_method", False):
1118
897
# Create a new, but exactly alike, function
1129
908
attribute.func_name,
1130
909
attribute.func_defaults,
1131
910
attribute.func_closure)))
1132
# Copy annotations, if any
1133
try:
1134
attr[attrname]._dbus_annotations = (
1135
dict(attribute._dbus_annotations))
1136
except AttributeError:
1137
pass
1138
911
# Is this a D-Bus property?
1139
912
elif getattr(attribute, "_dbus_is_property", False):
1140
913
# Create a new, but exactly alike, function
1154
927
attribute.func_name,
1155
928
attribute.func_defaults,
1156
929
attribute.func_closure)))
1157
# Copy annotations, if any
1158
try:
1159
attr[attrname]._dbus_annotations = (
1160
dict(attribute._dbus_annotations))
1161
except AttributeError:
1162
pass
1163
# Is this a D-Bus interface?
1164
elif getattr(attribute, "_dbus_is_interface", False):
1165
# Create a new, but exactly alike, function
1166
# object. Decorate it to be a new D-Bus interface
1167
# with the alternate D-Bus interface name. Add it
1168
# to the class.
1169
attr[attrname] = (dbus_interface_annotations
1170
(alt_interface)
1171
(types.FunctionType
1172
(attribute.func_code,
1173
attribute.func_globals,
1174
attribute.func_name,
1175
attribute.func_defaults,
1176
attribute.func_closure)))
1177
if deprecate:
1178
# Deprecate all alternate interfaces
1179
iname="_AlternateDBusNames_interface_annotation{0}"
1180
for interface_name in interface_names:
1181
@dbus_interface_annotations(interface_name)
1182
def func(self):
1183
return { "org.freedesktop.DBus.Deprecated":
1184
"true" }
1185
# Find an unused name
1186
for aname in (iname.format(i)
1187
for i in itertools.count()):
1188
if aname not in attr:
1189
attr[aname] = func
1190
break
1191
if interface_names:
1192
# Replace the class with a new subclass of it with
1193
# methods, signals, etc. as created above.
1194
cls = type(b"{0}Alternate".format(cls.__name__),
1195
(cls,), attr)
1196
return cls
1197
return wrapper
1198
1199
1200
@alternate_dbus_interfaces({"se.recompile.Mandos":
1201
"se.bsnet.fukt.Mandos"})
930
return type.__new__(mcs, name, bases, attr)
931
1202
932
class ClientDBus(Client, DBusObjectWithProperties):
1203
933
"""A Client class using D-Bus
1204
934
1215
945
def __init__(self, bus = None, *args, **kwargs):
1216
946
self.bus = bus
1217
947
Client.__init__(self, *args, **kwargs)
948
949
self._approvals_pending = 0
1218
950
# Only now, when this client is initialized, can it show up on
1219
951
# the D-Bus
1220
952
client_object_name = unicode(self.name).translate(
1224
956
("/clients/" + client_object_name))
1225
957
DBusObjectWithProperties.__init__(self, self.bus,
1226
958
self.dbus_object_path)
1227
959
1228
960
def notifychangeproperty(transform_func,
1229
961
dbus_name, type_func=lambda x: x,
1230
962
variant_level=1):
1231
963
""" Modify a variable so that it's a property which announces
1232
964
its changes to DBus.
1233
965
1234
966
transform_fun: Function that takes a value and a variant_level
1235
967
and transforms it to a D-Bus type.
1236
968
dbus_name: D-Bus name of the variable
1253
985
1254
986
return property(lambda self: getattr(self, attrname), setter)
1255
987
988
1256
989
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1257
990
approvals_pending = notifychangeproperty(dbus.Boolean,
1258
991
"ApprovalPending",
1265
998
checker is not None)
1266
999
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1267
1000
"LastCheckedOK")
1268
last_checker_status = notifychangeproperty(dbus.Int16,
1269
"LastCheckerStatus")
1270
1001
last_approval_request = notifychangeproperty(
1271
1002
datetime_to_dbus, "LastApprovalRequest")
1272
1003
approved_by_default = notifychangeproperty(dbus.Boolean,
1273
1004
"ApprovedByDefault")
1274
approval_delay = notifychangeproperty(dbus.UInt64,
1005
approval_delay = notifychangeproperty(dbus.UInt16,
1275
1006
"ApprovalDelay",
1276
1007
type_func =
1277
timedelta_to_milliseconds)
1008
_timedelta_to_milliseconds)
1278
1009
approval_duration = notifychangeproperty(
1279
dbus.UInt64, "ApprovalDuration",
1280
type_func = timedelta_to_milliseconds)
1010
dbus.UInt16, "ApprovalDuration",
1011
type_func = _timedelta_to_milliseconds)
1281
1012
host = notifychangeproperty(dbus.String, "Host")
1282
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1013
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1283
1014
type_func =
1284
timedelta_to_milliseconds)
1015
_timedelta_to_milliseconds)
1285
1016
extended_timeout = notifychangeproperty(
1286
dbus.UInt64, "ExtendedTimeout",
1287
type_func = timedelta_to_milliseconds)
1288
interval = notifychangeproperty(dbus.UInt64,
1017
dbus.UInt16, "ExtendedTimeout",
1018
type_func = _timedelta_to_milliseconds)
1019
interval = notifychangeproperty(dbus.UInt16,
1289
1020
"Interval",
1290
1021
type_func =
1291
timedelta_to_milliseconds)
1022
_timedelta_to_milliseconds)
1292
1023
checker_command = notifychangeproperty(dbus.String, "Checker")
1293
1024
1294
1025
del notifychangeproperty
1336
1067
return r
1337
1068
1338
1069
def _reset_approved(self):
1339
self.approved = None
1070
self._approved = None
1340
1071
return False
1341
1072
1342
1073
def approve(self, value=True):
1343
self.approved = value
1344
gobject.timeout_add(timedelta_to_milliseconds
1074
self.send_changedstate()
1075
self._approved = value
1076
gobject.timeout_add(_timedelta_to_milliseconds
1345
1077
(self.approval_duration),
1346
1078
self._reset_approved)
1347
self.send_changedstate()
1079
1348
1080
1349
1081
## D-Bus methods, signals & properties
1350
1082
_interface = "se.recompile.Mandos.Client"
1351
1083
1352
## Interfaces
1353
1354
@dbus_interface_annotations(_interface)
1355
def _foo(self):
1356
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1357
"false"}
1358
1359
1084
## Signals
1360
1085
1361
1086
# CheckerCompleted - signal
1460
1185
access="readwrite")
1461
1186
def ApprovalDuration_dbus_property(self, value=None):
1462
1187
if value is None: # get
1463
return dbus.UInt64(timedelta_to_milliseconds(
1188
return dbus.UInt64(_timedelta_to_milliseconds(
1464
1189
self.approval_duration))
1465
1190
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1466
1191
1480
1205
def Host_dbus_property(self, value=None):
1481
1206
if value is None: # get
1482
1207
return dbus.String(self.host)
1483
self.host = unicode(value)
1208
self.host = value
1484
1209
1485
1210
# Created - property
1486
1211
@dbus_service_property(_interface, signature="s", access="read")
1487
1212
def Created_dbus_property(self):
1488
return datetime_to_dbus(self.created)
1213
return dbus.String(datetime_to_dbus(self.created))
1489
1214
1490
1215
# LastEnabled - property
1491
1216
@dbus_service_property(_interface, signature="s", access="read")
1512
1237
return
1513
1238
return datetime_to_dbus(self.last_checked_ok)
1514
1239
1515
# LastCheckerStatus - property
1516
@dbus_service_property(_interface, signature="n",
1517
access="read")
1518
def LastCheckerStatus_dbus_property(self):
1519
return dbus.Int16(self.last_checker_status)
1520
1521
1240
# Expires - property
1522
1241
@dbus_service_property(_interface, signature="s", access="read")
1523
1242
def Expires_dbus_property(self):
1534
1253
def Timeout_dbus_property(self, value=None):
1535
1254
if value is None: # get
1536
1255
return dbus.UInt64(self.timeout_milliseconds())
1537
old_timeout = self.timeout
1538
1256
self.timeout = datetime.timedelta(0, 0, 0, value)
1539
# Reschedule disabling
1540
if self.enabled:
1541
now = datetime.datetime.utcnow()
1542
self.expires += self.timeout - old_timeout
1543
if self.expires <= now:
1544
# The timeout has passed
1545
self.disable()
1546
else:
1547
if (getattr(self, "disable_initiator_tag", None)
1548
is None):
1549
return
1550
gobject.source_remove(self.disable_initiator_tag)
1551
self.disable_initiator_tag = (
1552
gobject.timeout_add(
1553
timedelta_to_milliseconds(self.expires - now),
1554
self.disable))
1257
if getattr(self, "disable_initiator_tag", None) is None:
1258
return
1259
# Reschedule timeout
1260
gobject.source_remove(self.disable_initiator_tag)
1261
self.disable_initiator_tag = None
1262
self.expires = None
1263
time_to_die = _timedelta_to_milliseconds((self
1264
.last_checked_ok
1265
+ self.timeout)
1266
- datetime.datetime
1267
.utcnow())
1268
if time_to_die <= 0:
1269
# The timeout has passed
1270
self.disable()
1271
else:
1272
self.expires = (datetime.datetime.utcnow()
1273
+ datetime.timedelta(milliseconds =
1274
time_to_die))
1275
self.disable_initiator_tag = (gobject.timeout_add
1276
(time_to_die, self.disable))
1555
1277
1556
1278
# ExtendedTimeout - property
1557
1279
@dbus_service_property(_interface, signature="t",
1570
1292
self.interval = datetime.timedelta(0, 0, 0, value)
1571
1293
if getattr(self, "checker_initiator_tag", None) is None:
1572
1294
return
1573
if self.enabled:
1574
# Reschedule checker run
1575
gobject.source_remove(self.checker_initiator_tag)
1576
self.checker_initiator_tag = (gobject.timeout_add
1577
(value, self.start_checker))
1578
self.start_checker() # Start one now, too
1295
# Reschedule checker run
1296
gobject.source_remove(self.checker_initiator_tag)
1297
self.checker_initiator_tag = (gobject.timeout_add
1298
(value, self.start_checker))
1299
self.start_checker() # Start one now, too
1579
1300
1580
1301
# Checker - property
1581
1302
@dbus_service_property(_interface, signature="s",
1583
1304
def Checker_dbus_property(self, value=None):
1584
1305
if value is None: # get
1585
1306
return dbus.String(self.checker_command)
1586
self.checker_command = unicode(value)
1307
self.checker_command = value
1587
1308
1588
1309
# CheckerRunning - property
1589
1310
@dbus_service_property(_interface, signature="b",
1618
1339
raise KeyError()
1619
1340
1620
1341
def __getattribute__(self, name):
1621
if name == '_pipe':
1342
if(name == '_pipe'):
1622
1343
return super(ProxyClient, self).__getattribute__(name)
1623
1344
self._pipe.send(('getattr', name))
1624
1345
data = self._pipe.recv()
1631
1352
return func
1632
1353
1633
1354
def __setattr__(self, name, value):
1634
if name == '_pipe':
1355
if(name == '_pipe'):
1635
1356
return super(ProxyClient, self).__setattr__(name, value)
1636
1357
self._pipe.send(('setattr', name, value))
1637
1358
1359
class ClientDBusTransitional(ClientDBus):
1360
__metaclass__ = AlternateDBusNamesMetaclass
1638
1361
1639
1362
class ClientHandler(socketserver.BaseRequestHandler, object):
1640
1363
"""A class to handle client connections.
1723
1446
client.Rejected("Disabled")
1724
1447
return
1725
1448
1726
if client.approved or not client.approval_delay:
1449
if client._approved or not client.approval_delay:
1727
1450
#We are approved or approval is disabled
1728
1451
break
1729
elif client.approved is None:
1452
elif client._approved is None:
1730
1453
logger.info("Client %s needs approval",
1731
1454
client.name)
1732
1455
if self.server.use_dbus:
1745
1468
#wait until timeout or approved
1746
1469
time = datetime.datetime.now()
1747
1470
client.changedstate.acquire()
1748
client.changedstate.wait(
1749
float(timedelta_to_milliseconds(delay)
1750
/ 1000))
1471
(client.changedstate.wait
1472
(float(client._timedelta_to_milliseconds(delay)
1473
/ 1000)))
1751
1474
client.changedstate.release()
1752
1475
time2 = datetime.datetime.now()
1753
1476
if (time2 - time) >= delay:
1769
1492
try:
1770
1493
sent = session.send(client.secret[sent_size:])
1771
1494
except gnutls.errors.GNUTLSError as error:
1772
logger.warning("gnutls send failed",
1773
exc_info=error)
1495
logger.warning("gnutls send failed")
1774
1496
return
1775
1497
logger.debug("Sent: %d, remaining: %d",
1776
1498
sent, len(client.secret)
1779
1501
1780
1502
logger.info("Sending secret to %s", client.name)
1781
1503
# bump the timeout using extended_timeout
1782
client.bump_timeout(client.extended_timeout)
1504
client.checked_ok(client.extended_timeout)
1783
1505
if self.server.use_dbus:
1784
1506
# Emit D-Bus signal
1785
1507
client.GotSecret()
1790
1512
try:
1791
1513
session.bye()
1792
1514
except gnutls.errors.GNUTLSError as error:
1793
logger.warning("GnuTLS bye failed",
1794
exc_info=error)
1515
logger.warning("GnuTLS bye failed")
1795
1516
1796
1517
@staticmethod
1797
1518
def peer_certificate(session):
1853
1574
# Convert the buffer to a Python bytestring
1854
1575
fpr = ctypes.string_at(buf, buf_len.value)
1855
1576
# Convert the bytestring to hexadecimal notation
1856
hex_fpr = binascii.hexlify(fpr).upper()
1577
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1857
1578
return hex_fpr
1858
1579
1859
1580
1862
1583
def sub_process_main(self, request, address):
1863
1584
try:
1864
1585
self.finish_request(request, address)
1865
except Exception:
1586
except:
1866
1587
self.handle_error(request, address)
1867
1588
self.close_request(request)
1868
1589
1869
1590
def process_request(self, request, address):
1870
1591
"""Start a new process to process the request."""
1871
1592
proc = multiprocessing.Process(target = self.sub_process_main,
1872
args = (request, address))
1593
args = (request,
1594
address))
1873
1595
proc.start()
1874
1596
return proc
1875
1597
1997
1719
1998
1720
def handle_ipc(self, source, condition, parent_pipe=None,
1999
1721
proc = None, client_object=None):
1722
condition_names = {
1723
gobject.IO_IN: "IN", # There is data to read.
1724
gobject.IO_OUT: "OUT", # Data can be written (without
1725
# blocking).
1726
gobject.IO_PRI: "PRI", # There is urgent data to read.
1727
gobject.IO_ERR: "ERR", # Error condition.
1728
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1729
# broken, usually for pipes and
1730
# sockets).
1731
}
1732
conditions_string = ' | '.join(name
1733
for cond, name in
1734
condition_names.iteritems()
1735
if cond & condition)
2000
1736
# error, or the other end of multiprocessing.Pipe has closed
2001
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1737
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2002
1738
# Wait for other process to exit
2003
1739
proc.join()
2004
1740
return False
2094
1830
elif suffix == "w":
2095
1831
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2096
1832
else:
2097
raise ValueError("Unknown suffix {0!r}"
2098
.format(suffix))
1833
raise ValueError("Unknown suffix %r" % suffix)
2099
1834
except (ValueError, IndexError) as e:
2100
1835
raise ValueError(*(e.args))
2101
1836
timevalue += delta
2102
1837
return timevalue
2103
1838
2104
1839
1840
def if_nametoindex(interface):
1841
"""Call the C function if_nametoindex(), or equivalent
1842
1843
Note: This function cannot accept a unicode string."""
1844
global if_nametoindex
1845
try:
1846
if_nametoindex = (ctypes.cdll.LoadLibrary
1847
(ctypes.util.find_library("c"))
1848
.if_nametoindex)
1849
except (OSError, AttributeError):
1850
logger.warning("Doing if_nametoindex the hard way")
1851
def if_nametoindex(interface):
1852
"Get an interface index the hard way, i.e. using fcntl()"
1853
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1854
with contextlib.closing(socket.socket()) as s:
1855
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1856
struct.pack(str("16s16x"),
1857
interface))
1858
interface_index = struct.unpack(str("I"),
1859
ifreq[16:20])[0]
1860
return interface_index
1861
return if_nametoindex(interface)
1862
1863
2105
1864
def daemon(nochdir = False, noclose = False):
2106
1865
"""See daemon(3). Standard BSD Unix function.
2107
1866
2115
1874
sys.exit()
2116
1875
if not noclose:
2117
1876
# Close all standard open file descriptors
2118
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1877
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2119
1878
if not stat.S_ISCHR(os.fstat(null).st_mode):
2120
1879
raise OSError(errno.ENODEV,
2121
"{0} not a character device"
2122
.format(os.devnull))
1880
"%s not a character device"
1881
% os.path.devnull)
2123
1882
os.dup2(null, sys.stdin.fileno())
2124
1883
os.dup2(null, sys.stdout.fileno())
2125
1884
os.dup2(null, sys.stderr.fileno())
2134
1893
2135
1894
parser = argparse.ArgumentParser()
2136
1895
parser.add_argument("-v", "--version", action="version",
2137
version = "%(prog)s {0}".format(version),
1896
version = "%%(prog)s %s" % version,
2138
1897
help="show version number and exit")
2139
1898
parser.add_argument("-i", "--interface", metavar="IF",
2140
1899
help="Bind to interface IF")
2163
1922
parser.add_argument("--no-ipv6", action="store_false",
2164
1923
dest="use_ipv6", help="Do not use IPv6")
2165
1924
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
1925
dest="restore", help="Do not restore stored state",
1926
default=True)
1927
2171
1928
options = parser.parse_args()
2172
1929
2173
1930
if options.check:
2186
1943
"use_dbus": "True",
2187
1944
"use_ipv6": "True",
2188
1945
"debuglevel": "",
2189
"restore": "True",
2190
"statedir": "/var/lib/mandos"
2191
1946
}
2192
1947
2193
1948
# Parse config file for server-global settings
2210
1965
# options, if set.
2211
1966
for option in ("interface", "address", "port", "debug",
2212
1967
"priority", "servicename", "configdir",
2213
"use_dbus", "use_ipv6", "debuglevel", "restore",
2214
"statedir"):
1968
"use_dbus", "use_ipv6", "debuglevel", "restore"):
2215
1969
value = getattr(options, option)
2216
1970
if value is not None:
2217
1971
server_settings[option] = value
2229
1983
debuglevel = server_settings["debuglevel"]
2230
1984
use_dbus = server_settings["use_dbus"]
2231
1985
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
1986
2244
1987
if server_settings["servicename"] != "Mandos":
2245
1988
syslogger.setFormatter(logging.Formatter
2246
('Mandos ({0}) [%(process)d]:'
2247
' %(levelname)s: %(message)s'
2248
.format(server_settings
2249
["servicename"])))
1989
('Mandos (%s) [%%(process)d]:'
1990
' %%(levelname)s: %%(message)s'
1991
% server_settings["servicename"]))
2250
1992
2251
1993
# Parse config file with clients
2252
client_config = configparser.SafeConfigParser(Client
2253
.client_defaults)
1994
client_defaults = { "timeout": "5m",
1995
"extended_timeout": "15m",
1996
"interval": "2m",
1997
"checker": "fping -q -- %%(host)s",
1998
"host": "",
1999
"approval_delay": "0s",
2000
"approval_duration": "1s",
2001
}
2002
client_config = configparser.SafeConfigParser(client_defaults)
2254
2003
client_config.read(os.path.join(server_settings["configdir"],
2255
2004
"clients.conf"))
2256
2005
2270
2019
pidfilename = "/var/run/mandos.pid"
2271
2020
try:
2272
2021
pidfile = open(pidfilename, "w")
2273
except IOError as e:
2274
logger.error("Could not open file %r", pidfilename,
2275
exc_info=e)
2022
except IOError:
2023
logger.error("Could not open file %r", pidfilename)
2276
2024
2277
for name in ("_mandos", "mandos", "nobody"):
2025
try:
2026
uid = pwd.getpwnam("_mandos").pw_uid
2027
gid = pwd.getpwnam("_mandos").pw_gid
2028
except KeyError:
2278
2029
try:
2279
uid = pwd.getpwnam(name).pw_uid
2280
gid = pwd.getpwnam(name).pw_gid
2281
break
2030
uid = pwd.getpwnam("mandos").pw_uid
2031
gid = pwd.getpwnam("mandos").pw_gid
2282
2032
except KeyError:
2283
continue
2284
else:
2285
uid = 65534
2286
gid = 65534
2033
try:
2034
uid = pwd.getpwnam("nobody").pw_uid
2035
gid = pwd.getpwnam("nobody").pw_gid
2036
except KeyError:
2037
uid = 65534
2038
gid = 65534
2287
2039
try:
2288
2040
os.setgid(gid)
2289
2041
os.setuid(uid)
2291
2043
if error[0] != errno.EPERM:
2292
2044
raise error
2293
2045
2046
if not debug and not debuglevel:
2047
logger.setLevel(logging.WARNING)
2048
if debuglevel:
2049
level = getattr(logging, debuglevel.upper())
2050
logger.setLevel(level)
2051
2294
2052
if debug:
2053
logger.setLevel(logging.DEBUG)
2295
2054
# Enable all possible GnuTLS debugging
2296
2055
2297
2056
# "Use a log level over 10 to enable all debugging options."
2306
2065
.gnutls_global_set_log_function(debug_gnutls))
2307
2066
2308
2067
# Redirect stdin so all checkers get /dev/null
2309
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2068
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2310
2069
os.dup2(null, sys.stdin.fileno())
2311
2070
if null > 2:
2312
2071
os.close(null)
2072
else:
2073
# No console logging
2074
logger.removeHandler(console)
2313
2075
2314
2076
# Need to fork before connecting to D-Bus
2315
2077
if not debug:
2316
2078
# Close all input and output, do double fork, etc.
2317
2079
daemon()
2318
2080
2319
gobject.threads_init()
2320
2321
2081
global main_loop
2322
2082
# From the Avahi example code
2323
DBusGMainLoop(set_as_default=True)
2083
DBusGMainLoop(set_as_default=True )
2324
2084
main_loop = gobject.MainLoop()
2325
2085
bus = dbus.SystemBus()
2326
2086
# End of Avahi example code
2332
2092
("se.bsnet.fukt.Mandos", bus,
2333
2093
do_not_queue=True))
2334
2094
except dbus.exceptions.NameExistsException as e:
2335
logger.error("Disabling D-Bus:", exc_info=e)
2095
logger.error(unicode(e) + ", disabling D-Bus")
2336
2096
use_dbus = False
2337
2097
server_settings["use_dbus"] = False
2338
2098
tcp_server.use_dbus = False
2350
2110
2351
2111
client_class = Client
2352
2112
if use_dbus:
2353
client_class = functools.partial(ClientDBus, bus = bus)
2354
2355
client_settings = Client.config_parser(client_config)
2113
client_class = functools.partial(ClientDBusTransitional,
2114
bus = bus)
2115
2116
special_settings = {
2117
# Some settings need to be accessd by special methods;
2118
# booleans need .getboolean(), etc. Here is a list of them:
2119
"approved_by_default":
2120
lambda section:
2121
client_config.getboolean(section, "approved_by_default"),
2122
}
2123
# Construct a new dict of client settings of this form:
2124
# { client_name: {setting_name: value, ...}, ...}
2125
# with exceptions for any special settings as defined above
2126
client_settings = dict((clientname,
2127
dict((setting,
2128
(value if setting not in special_settings
2129
else special_settings[setting](clientname)))
2130
for setting, value in client_config.items(clientname)))
2131
for clientname in client_config.sections())
2132
2356
2133
old_client_settings = {}
2357
clients_data = {}
2358
2359
# Get client data and settings from last running state.
2134
clients_data = []
2135
2136
# Get client data and settings from last running state.
2360
2137
if server_settings["restore"]:
2361
2138
try:
2362
2139
with open(stored_state_path, "rb") as stored_state:
2363
clients_data, old_client_settings = (pickle.load
2364
(stored_state))
2140
clients_data, old_client_settings = pickle.load(stored_state)
2365
2141
os.remove(stored_state_path)
2366
2142
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)
2143
logger.warning("Could not load persistant state: {0}".format(e))
2144
if e.errno != errno.ENOENT:
2373
2145
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))
2146
2147
for client in clients_data:
2148
client_name = client["name"]
2149
2150
# Decide which value to use after restoring saved state.
2151
# We have three different values: Old config file,
2152
# new config file, and saved state.
2153
# New config value takes precedence if it differs from old
2154
# config value, otherwise use saved state.
2155
for name, value in client_settings[client_name].items():
2424
2156
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
2157
# For each value in new config, check if it differs
2158
# from the old config value (Except for the "secret"
2159
# attribute)
2160
if name != "secret" and value != old_client_settings[client_name][name]:
2161
setattr(client, name, value)
2162
except KeyError:
2163
pass
2164
2165
# Clients who has passed its expire date, can still be enabled if its
2166
# last checker was sucessful. Clients who checkers failed before we
2167
# stored it state is asumed to had failed checker during downtime.
2168
if client["enabled"] and client["last_checked_ok"]:
2169
if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2170
> client["interval"]):
2171
if client["last_checker_status"] != 0:
2172
client["enabled"] = False
2173
else:
2174
client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2175
2176
client["changedstate"] = (multiprocessing_manager
2177
.Condition(multiprocessing_manager
2178
.Lock()))
2179
if use_dbus:
2180
new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2181
tcp_server.clients[client_name] = new_client
2182
new_client.bus = bus
2183
for name, value in client.iteritems():
2184
setattr(new_client, name, value)
2185
client_object_name = unicode(client_name).translate(
2186
{ord("."): ord("_"),
2187
ord("-"): ord("_")})
2188
new_client.dbus_object_path = (dbus.ObjectPath
2189
("/clients/" + client_object_name))
2190
DBusObjectWithProperties.__init__(new_client,
2191
new_client.bus,
2192
new_client.dbus_object_path)
2193
else:
2194
tcp_server.clients[client_name] = Client.__new__(Client)
2195
for name, value in client.iteritems():
2196
setattr(tcp_server.clients[client_name], name, value)
2197
2198
tcp_server.clients[client_name].decrypt_secret(
2199
client_settings[client_name]["secret"])
2200
2201
# Create/remove clients based on new changes made to config
2202
for clientname in set(old_client_settings) - set(client_settings):
2203
del tcp_server.clients[clientname]
2204
for clientname in set(client_settings) - set(old_client_settings):
2205
tcp_server.clients[clientname] = (client_class(name = clientname,
2206
config =
2207
client_settings
2208
[clientname]))
2209
2210
2449
2211
if not tcp_server.clients:
2450
2212
logger.warning("No clients defined")
2451
2213
2452
2214
if not debug:
2453
2215
try:
2454
2216
with pidfile:
2462
2224
# "pidfile" was never created
2463
2225
pass
2464
2226
del pidfilename
2227
2465
2228
signal.signal(signal.SIGINT, signal.SIG_IGN)
2466
2229
2467
2230
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2468
2231
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2469
2232
2470
2233
if use_dbus:
2471
@alternate_dbus_interfaces({"se.recompile.Mandos":
2472
"se.bsnet.fukt.Mandos"})
2473
class MandosDBusService(DBusObjectWithProperties):
2234
class MandosDBusService(dbus.service.Object):
2474
2235
"""A D-Bus proxy object"""
2475
2236
def __init__(self):
2476
2237
dbus.service.Object.__init__(self, bus, "/")
2477
2238
_interface = "se.recompile.Mandos"
2478
2239
2479
@dbus_interface_annotations(_interface)
2480
def _foo(self):
2481
return { "org.freedesktop.DBus.Property"
2482
".EmitsChangedSignal":
2483
"false"}
2484
2485
2240
@dbus.service.signal(_interface, signature="o")
2486
2241
def ClientAdded(self, objpath):
2487
2242
"D-Bus signal"
2529
2284
2530
2285
del _interface
2531
2286
2532
mandos_dbus_service = MandosDBusService()
2287
class MandosDBusServiceTransitional(MandosDBusService):
2288
__metaclass__ = AlternateDBusNamesMetaclass
2289
mandos_dbus_service = MandosDBusServiceTransitional()
2533
2290
2534
2291
def cleanup():
2535
2292
"Cleanup function; run on exit"
2538
2295
multiprocessing.active_children()
2539
2296
if not (tcp_server.clients or client_settings):
2540
2297
return
2541
2542
# Store client before exiting. Secrets are encrypted with key
2543
# based on what config file has. If config file is
2544
# removed/edited, old secret will thus be unrecovable.
2545
clients = {}
2546
with PGPEngine() as pgp:
2547
for client in tcp_server.clients.itervalues():
2548
key = client_settings[client.name]["secret"]
2549
client.encrypted_secret = pgp.encrypt(client.secret,
2550
key)
2551
client_dict = {}
2552
2553
# A list of attributes that can not be pickled
2554
# + secret.
2555
exclude = set(("bus", "changedstate", "secret",
2556
"checker"))
2557
for name, typ in (inspect.getmembers
2558
(dbus.service.Object)):
2559
exclude.add(name)
2560
2561
client_dict["encrypted_secret"] = (client
2562
.encrypted_secret)
2563
for attr in client.client_structure:
2564
if attr not in exclude:
2565
client_dict[attr] = getattr(client, attr)
2566
2567
clients[client.name] = client_dict
2568
del client_settings[client.name]["secret"]
2569
2298
2299
# Store client before exiting. Secrets are encrypted with key based
2300
# on what config file has. If config file is removed/edited, old
2301
# secret will thus be unrecovable.
2302
clients = []
2303
for client in tcp_server.clients.itervalues():
2304
client.encrypt_secret(client_settings[client.name]["secret"])
2305
2306
client_dict = {}
2307
2308
# A list of attributes that will not be stored when shuting down.
2309
exclude = set(("bus", "changedstate", "secret"))
2310
for name, typ in inspect.getmembers(dbus.service.Object):
2311
exclude.add(name)
2312
2313
client_dict["encrypted_secret"] = client.encrypted_secret
2314
for attr in client.client_structure:
2315
if attr not in exclude:
2316
client_dict[attr] = getattr(client, attr)
2317
2318
clients.append(client_dict)
2319
del client_settings[client.name]["secret"]
2320
2570
2321
try:
2571
with (tempfile.NamedTemporaryFile
2572
(mode='wb', suffix=".pickle", prefix='clients-',
2573
dir=os.path.dirname(stored_state_path),
2574
delete=False)) as stored_state:
2322
with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2575
2323
pickle.dump((clients, client_settings), stored_state)
2576
tempname=stored_state.name
2577
os.rename(tempname, stored_state_path)
2578
except (IOError, OSError) as e:
2579
if not debug:
2580
try:
2581
os.remove(tempname)
2582
except NameError:
2583
pass
2584
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2585
logger.warning("Could not save persistent state: {0}"
2586
.format(os.strerror(e.errno)))
2587
else:
2588
logger.warning("Could not save persistent state:",
2589
exc_info=e)
2590
raise e
2591
2324
except IOError as e:
2325
logger.warning("Could not save persistant state: {0}".format(e))
2326
if e.errno != errno.ENOENT:
2327
raise
2328
2592
2329
# Delete all clients, and settings from config
2593
2330
while tcp_server.clients:
2594
2331
name, client = tcp_server.clients.popitem()
2612
2349
# Need to initiate checking of clients
2613
2350
if client.enabled:
2614
2351
client.init_checker()
2352
2615
2353
2616
2354
tcp_server.enable()
2617
2355
tcp_server.server_activate()
2620
2358
service.port = tcp_server.socket.getsockname()[1]
2621
2359
if use_ipv6:
2622
2360
logger.info("Now listening on address %r, port %d,"
2623
" flowinfo %d, scope_id %d",
2624
*tcp_server.socket.getsockname())
2361
" flowinfo %d, scope_id %d"
2362
% tcp_server.socket.getsockname())
2625
2363
else: # IPv4
2626
logger.info("Now listening on address %r, port %d",
2627
*tcp_server.socket.getsockname())
2364
logger.info("Now listening on address %r, port %d"
2365
% tcp_server.socket.getsockname())
2628
2366
2629
2367
#service.interface = tcp_server.socket.getsockname()[3]
2630
2368
2633
2371
try:
2634
2372
service.activate()
2635
2373
except dbus.exceptions.DBusException as error:
2636
logger.critical("D-Bus Exception", exc_info=error)
2374
logger.critical("DBusException: %s", error)
2637
2375
cleanup()
2638
2376
sys.exit(1)
2639
2377
# End of Avahi example code
2646
2384
logger.debug("Starting main loop")
2647
2385
main_loop.run()
2648
2386
except AvahiError as error:
2649
logger.critical("Avahi Error", exc_info=error)
2387
logger.critical("AvahiError: %s", error)
2650
2388
cleanup()
2651
2389
sys.exit(1)
2652
2390
except KeyboardInterrupt:
2657
2395
# Must run before the D-Bus bus name gets deregistered
2658
2396
cleanup()
2659
2397
2398
2660
2399
if __name__ == '__main__':
2661
2400
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0