To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 520
- compare with another revision
- download diff
- download tarball
- view history from revision 520
- 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:
- debian/mandos-client.examples
- 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 © 2008-2014 Teddy Hogeborn
15
# Copyright © 2008-2014 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
71
import collections
66
import hashlib
72
67
73
68
import dbus
74
69
import dbus.service
79
74
import ctypes.util
80
75
import xml.dom.minidom
81
76
import inspect
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 = "1.6.2"
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.tempdir = tempfile.mkdtemp(prefix="mandos-")
143
self.gnupgargs = ['--batch',
144
'--home', self.tempdir,
145
'--force-mdc',
146
'--quiet',
147
'--no-use-agent']
148
149
def __enter__(self):
150
return self
151
152
def __exit__(self, exc_type, exc_value, traceback):
153
self._cleanup()
154
return False
155
156
def __del__(self):
157
self._cleanup()
158
159
def _cleanup(self):
160
if self.tempdir is not None:
161
# Delete contents of tempdir
162
for root, dirs, files in os.walk(self.tempdir,
163
topdown = False):
164
for filename in files:
165
os.remove(os.path.join(root, filename))
166
for dirname in dirs:
167
os.rmdir(os.path.join(root, dirname))
168
# Remove tempdir
169
os.rmdir(self.tempdir)
170
self.tempdir = None
171
172
def password_encode(self, password):
173
# Passphrase can not be empty and can not contain newlines or
174
# NUL bytes. So we prefix it and hex encode it.
175
encoded = b"mandos" + binascii.hexlify(password)
176
if len(encoded) > 2048:
177
# GnuPG can't handle long passwords, so encode differently
178
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
179
.replace(b"\n", b"\\n")
180
.replace(b"\0", b"\\x00"))
181
return encoded
182
183
def encrypt(self, data, password):
184
passphrase = self.password_encode(password)
185
with tempfile.NamedTemporaryFile(dir=self.tempdir
186
) as passfile:
187
passfile.write(passphrase)
188
passfile.flush()
189
proc = subprocess.Popen(['gpg', '--symmetric',
190
'--passphrase-file',
191
passfile.name]
192
+ self.gnupgargs,
193
stdin = subprocess.PIPE,
194
stdout = subprocess.PIPE,
195
stderr = subprocess.PIPE)
196
ciphertext, err = proc.communicate(input = data)
197
if proc.returncode != 0:
198
raise PGPError(err)
199
return ciphertext
200
201
def decrypt(self, data, password):
202
passphrase = self.password_encode(password)
203
with tempfile.NamedTemporaryFile(dir = self.tempdir
204
) as passfile:
205
passfile.write(passphrase)
206
passfile.flush()
207
proc = subprocess.Popen(['gpg', '--decrypt',
208
'--passphrase-file',
209
passfile.name]
210
+ self.gnupgargs,
211
stdin = subprocess.PIPE,
212
stdout = subprocess.PIPE,
213
stderr = subprocess.PIPE)
214
decrypted_plaintext, err = proc.communicate(input
215
= data)
216
if proc.returncode != 0:
217
raise PGPError(err)
218
return decrypted_plaintext
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)
219
107
220
108
221
109
class AvahiError(Exception):
240
128
Used to optionally bind to the specified interface.
241
129
name: string; Example: 'Mandos'
242
130
type: string; Example: '_mandos._tcp'.
243
See <https://www.iana.org/assignments/service-names-port-numbers>
131
See <http://www.dns-sd.org/ServiceTypes.html>
244
132
port: integer; what port to announce
245
133
TXT: list of strings; TXT record for the service
246
134
domain: string; Domain to publish on, default to .local if empty.
252
140
server: D-Bus Server
253
141
bus: dbus.SystemBus()
254
142
"""
255
256
143
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
257
144
servicetype = None, port = None, TXT = None,
258
145
domain = "", host = "", max_renames = 32768,
271
158
self.server = None
272
159
self.bus = bus
273
160
self.entry_group_state_changed_match = None
274
275
161
def rename(self):
276
162
"""Derived from the Avahi example code"""
277
163
if self.rename_count >= self.max_renames:
287
173
try:
288
174
self.add()
289
175
except dbus.exceptions.DBusException as error:
290
logger.critical("D-Bus Exception", exc_info=error)
176
logger.critical("DBusException: %s", error)
291
177
self.cleanup()
292
178
os._exit(1)
293
179
self.rename_count += 1
294
295
180
def remove(self):
296
181
"""Derived from the Avahi example code"""
297
182
if self.entry_group_state_changed_match is not None:
299
184
self.entry_group_state_changed_match = None
300
185
if self.group is not None:
301
186
self.group.Reset()
302
303
187
def add(self):
304
188
"""Derived from the Avahi example code"""
305
189
self.remove()
322
206
dbus.UInt16(self.port),
323
207
avahi.string_array_to_txt_array(self.TXT))
324
208
self.group.Commit()
325
326
209
def entry_group_state_changed(self, state, error):
327
210
"""Derived from the Avahi example code"""
328
211
logger.debug("Avahi entry group state change: %i", state)
335
218
elif state == avahi.ENTRY_GROUP_FAILURE:
336
219
logger.critical("Avahi: Error in group state changed %s",
337
220
unicode(error))
338
raise AvahiGroupError("State changed: {0!s}"
339
.format(error))
340
221
raise AvahiGroupError("State changed: %s"
222
% unicode(error))
341
223
def cleanup(self):
342
224
"""Derived from the Avahi example code"""
343
225
if self.group is not None:
344
226
try:
345
227
self.group.Free()
346
228
except (dbus.exceptions.UnknownMethodException,
347
dbus.exceptions.DBusException):
229
dbus.exceptions.DBusException) as e:
348
230
pass
349
231
self.group = None
350
232
self.remove()
351
352
233
def server_state_changed(self, state, error=None):
353
234
"""Derived from the Avahi example code"""
354
235
logger.debug("Avahi server state change: %i", state)
373
254
logger.debug("Unknown state: %r", state)
374
255
else:
375
256
logger.debug("Unknown state: %r: %r", state, error)
376
377
257
def activate(self):
378
258
"""Derived from the Avahi example code"""
379
259
if self.server is None:
386
266
self.server_state_changed)
387
267
self.server_state_changed(self.server.GetState())
388
268
389
390
269
class AvahiServiceToSyslog(AvahiService):
391
270
def rename(self):
392
271
"""Add the new name to the syslog messages"""
393
272
ret = AvahiService.rename(self)
394
273
syslogger.setFormatter(logging.Formatter
395
('Mandos ({0}) [%(process)d]:'
396
' %(levelname)s: %(message)s'
397
.format(self.name)))
274
('Mandos (%s) [%%(process)d]:'
275
' %%(levelname)s: %%(message)s'
276
% self.name))
398
277
return ret
399
278
400
401
def timedelta_to_milliseconds(td):
279
def _timedelta_to_milliseconds(td):
402
280
"Convert a datetime.timedelta() to milliseconds"
403
281
return ((td.days * 24 * 60 * 60 * 1000)
404
282
+ (td.seconds * 1000)
405
283
+ (td.microseconds // 1000))
406
407
284
408
285
class Client(object):
409
286
"""A representation of a client host served by this server.
410
287
411
288
Attributes:
412
approved: bool(); 'None' if not yet approved/disapproved
289
_approved: bool(); 'None' if not yet approved/disapproved
413
290
approval_delay: datetime.timedelta(); Time to wait for approval
414
291
approval_duration: datetime.timedelta(); Duration of one approval
415
292
checker: subprocess.Popen(); a running checker process used
433
310
interval: datetime.timedelta(); How often to start a new checker
434
311
last_approval_request: datetime.datetime(); (UTC) or None
435
312
last_checked_ok: datetime.datetime(); (UTC) or None
436
last_checker_status: integer between 0 and 255 reflecting exit
437
status of last checker. -1 reflects crashed
438
checker, -2 means no checker completed yet.
439
last_enabled: datetime.datetime(); (UTC) or None
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)
440
317
name: string; from the config file, used in log messages and
441
318
D-Bus identifiers
442
319
secret: bytestring; sent verbatim (over TLS) to client
443
320
timeout: datetime.timedelta(); How long from last_checked_ok
444
321
until this client is disabled
445
extended_timeout: extra long timeout when secret has been sent
322
extended_timeout: extra long timeout when password has been sent
446
323
runtime_expansions: Allowed attributes for runtime expansion.
447
324
expires: datetime.datetime(); time (UTC) when a client will be
448
325
disabled, or None
449
server_settings: The server_settings dict from main()
450
326
"""
451
327
452
328
runtime_expansions = ("approval_delay", "approval_duration",
453
"created", "enabled", "expires",
454
"fingerprint", "host", "interval",
455
"last_approval_request", "last_checked_ok",
329
"created", "enabled", "fingerprint",
330
"host", "interval", "last_checked_ok",
456
331
"last_enabled", "name", "timeout")
457
client_defaults = { "timeout": "PT5M",
458
"extended_timeout": "PT15M",
459
"interval": "PT2M",
460
"checker": "fping -q -- %%(host)s",
461
"host": "",
462
"approval_delay": "PT0S",
463
"approval_duration": "PT1S",
464
"approved_by_default": "True",
465
"enabled": "True",
466
}
467
332
468
333
def timeout_milliseconds(self):
469
334
"Return the 'timeout' attribute in milliseconds"
470
return timedelta_to_milliseconds(self.timeout)
335
return _timedelta_to_milliseconds(self.timeout)
471
336
472
337
def extended_timeout_milliseconds(self):
473
338
"Return the 'extended_timeout' attribute in milliseconds"
474
return timedelta_to_milliseconds(self.extended_timeout)
339
return _timedelta_to_milliseconds(self.extended_timeout)
475
340
476
341
def interval_milliseconds(self):
477
342
"Return the 'interval' attribute in milliseconds"
478
return timedelta_to_milliseconds(self.interval)
343
return _timedelta_to_milliseconds(self.interval)
479
344
480
345
def approval_delay_milliseconds(self):
481
return timedelta_to_milliseconds(self.approval_delay)
482
483
@staticmethod
484
def config_parser(config):
485
"""Construct a new dict of client settings of this form:
486
{ client_name: {setting_name: value, ...}, ...}
487
with exceptions for any special settings as defined above.
488
NOTE: Must be a pure function. Must return the same result
489
value given the same arguments.
490
"""
491
settings = {}
492
for client_name in config.sections():
493
section = dict(config.items(client_name))
494
client = settings[client_name] = {}
495
496
client["host"] = section["host"]
497
# Reformat values from string types to Python types
498
client["approved_by_default"] = config.getboolean(
499
client_name, "approved_by_default")
500
client["enabled"] = config.getboolean(client_name,
501
"enabled")
502
503
client["fingerprint"] = (section["fingerprint"].upper()
504
.replace(" ", ""))
505
if "secret" in section:
506
client["secret"] = section["secret"].decode("base64")
507
elif "secfile" in section:
508
with open(os.path.expanduser(os.path.expandvars
509
(section["secfile"])),
510
"rb") as secfile:
511
client["secret"] = secfile.read()
512
else:
513
raise TypeError("No secret or secfile for section {0}"
514
.format(section))
515
client["timeout"] = string_to_delta(section["timeout"])
516
client["extended_timeout"] = string_to_delta(
517
section["extended_timeout"])
518
client["interval"] = string_to_delta(section["interval"])
519
client["approval_delay"] = string_to_delta(
520
section["approval_delay"])
521
client["approval_duration"] = string_to_delta(
522
section["approval_duration"])
523
client["checker_command"] = section["checker"]
524
client["last_approval_request"] = None
525
client["last_checked_ok"] = None
526
client["last_checker_status"] = -2
527
528
return settings
529
530
def __init__(self, settings, name = None, server_settings=None):
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."""
531
352
self.name = name
532
if server_settings is None:
533
server_settings = {}
534
self.server_settings = server_settings
535
# adding all client settings
536
for setting, value in settings.iteritems():
537
setattr(self, setting, value)
538
539
if self.enabled:
540
if not hasattr(self, "last_enabled"):
541
self.last_enabled = datetime.datetime.utcnow()
542
if not hasattr(self, "expires"):
543
self.expires = (datetime.datetime.utcnow()
544
+ self.timeout)
545
else:
546
self.last_enabled = None
547
self.expires = None
548
353
if config is None:
354
config = {}
549
355
logger.debug("Creating client %r", self.name)
550
356
# Uppercase and remove spaces from fingerprint for later
551
357
# comparison purposes with return value from the fingerprint()
552
358
# function
359
self.fingerprint = (config["fingerprint"].upper()
360
.replace(" ", ""))
553
361
logger.debug(" Fingerprint: %s", self.fingerprint)
554
self.created = settings.get("created",
555
datetime.datetime.utcnow())
556
557
# 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"])
558
383
self.checker = None
559
384
self.checker_initiator_tag = None
560
385
self.disable_initiator_tag = None
386
self.expires = datetime.datetime.utcnow() + self.timeout
561
387
self.checker_callback_tag = None
388
self.checker_command = config["checker"]
562
389
self.current_checker_command = None
563
self.approved = None
390
self._approved = None
391
self.approved_by_default = config.get("approved_by_default",
392
True)
564
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"])
565
398
self.changedstate = (multiprocessing_manager
566
399
.Condition(multiprocessing_manager
567
400
.Lock()))
568
self.client_structure = [attr for attr in
569
self.__dict__.iterkeys()
570
if not attr.startswith("_")]
401
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
571
402
self.client_structure.append("client_structure")
572
403
404
573
405
for name, t in inspect.getmembers(type(self),
574
lambda obj:
575
isinstance(obj,
576
property)):
406
lambda obj: isinstance(obj, property)):
577
407
if not name.startswith("_"):
578
408
self.client_structure.append(name)
579
409
587
417
if getattr(self, "enabled", False):
588
418
# Already enabled
589
419
return
420
self.send_changedstate()
590
421
self.expires = datetime.datetime.utcnow() + self.timeout
591
422
self.enabled = True
592
423
self.last_enabled = datetime.datetime.utcnow()
593
424
self.init_checker()
594
self.send_changedstate()
595
425
596
426
def disable(self, quiet=True):
597
427
"""Disable this client."""
598
428
if not getattr(self, "enabled", False):
599
429
return False
600
430
if not quiet:
431
self.send_changedstate()
432
if not quiet:
601
433
logger.info("Disabling client %s", self.name)
602
if getattr(self, "disable_initiator_tag", None) is not None:
434
if getattr(self, "disable_initiator_tag", False):
603
435
gobject.source_remove(self.disable_initiator_tag)
604
436
self.disable_initiator_tag = None
605
437
self.expires = None
606
if getattr(self, "checker_initiator_tag", None) is not None:
438
if getattr(self, "checker_initiator_tag", False):
607
439
gobject.source_remove(self.checker_initiator_tag)
608
440
self.checker_initiator_tag = None
609
441
self.stop_checker()
610
442
self.enabled = False
611
if not quiet:
612
self.send_changedstate()
613
443
# Do not run this again if called by a gobject.timeout_add
614
444
return False
615
445
616
446
def __del__(self):
617
447
self.disable()
618
448
619
449
def init_checker(self):
620
450
# Schedule a new checker to be started an 'interval' from now,
621
451
# and every interval from then on.
622
if self.checker_initiator_tag is not None:
623
gobject.source_remove(self.checker_initiator_tag)
624
452
self.checker_initiator_tag = (gobject.timeout_add
625
453
(self.interval_milliseconds(),
626
454
self.start_checker))
627
455
# Schedule a disable() when 'timeout' has passed
628
if self.disable_initiator_tag is not None:
629
gobject.source_remove(self.disable_initiator_tag)
630
456
self.disable_initiator_tag = (gobject.timeout_add
631
457
(self.timeout_milliseconds(),
632
458
self.disable))
633
459
# Also start a new checker *right now*.
634
460
self.start_checker()
635
461
462
636
463
def checker_callback(self, pid, condition, command):
637
464
"""The checker has completed, so take appropriate actions."""
638
465
self.checker_callback_tag = None
639
466
self.checker = None
640
467
if os.WIFEXITED(condition):
641
self.last_checker_status = os.WEXITSTATUS(condition)
468
self.last_checker_status = os.WEXITSTATUS(condition)
642
469
if self.last_checker_status == 0:
643
470
logger.info("Checker for %(name)s succeeded",
644
471
vars(self))
651
478
logger.warning("Checker for %(name)s crashed?",
652
479
vars(self))
653
480
654
def checked_ok(self):
655
"""Assert that the client has been seen, alive and well."""
656
self.last_checked_ok = datetime.datetime.utcnow()
657
self.last_checker_status = 0
658
self.bump_timeout()
659
660
def bump_timeout(self, timeout=None):
661
"""Bump up the timeout for this client."""
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
"""
662
487
if timeout is None:
663
488
timeout = self.timeout
489
self.last_checked_ok = datetime.datetime.utcnow()
664
490
if self.disable_initiator_tag is not None:
665
491
gobject.source_remove(self.disable_initiator_tag)
666
self.disable_initiator_tag = None
667
492
if getattr(self, "enabled", False):
668
493
self.disable_initiator_tag = (gobject.timeout_add
669
(timedelta_to_milliseconds
494
(_timedelta_to_milliseconds
670
495
(timeout), self.disable))
671
496
self.expires = datetime.datetime.utcnow() + timeout
672
497
679
504
If a checker already exists, leave it running and do
680
505
nothing."""
681
506
# The reason for not killing a running checker is that if we
682
# did that, and if a checker (for some reason) started running
683
# slowly and taking more than 'interval' time, then the client
684
# would inevitably timeout, since no checker would get a
685
# chance to run to completion. If we instead leave running
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
686
511
# checkers alone, the checker would have to take more time
687
512
# than 'timeout' for the client to be disabled, which is as it
688
513
# should be.
690
515
# If a checker exists, make sure it is not a zombie
691
516
try:
692
517
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
693
except AttributeError:
694
pass
695
except OSError as error:
696
if error.errno != errno.ECHILD:
697
raise
518
except (AttributeError, OSError) as error:
519
if (isinstance(error, OSError)
520
and error.errno != errno.ECHILD):
521
raise error
698
522
else:
699
523
if pid:
700
524
logger.warning("Checker was a zombie")
703
527
self.current_checker_command)
704
528
# Start a new checker if needed
705
529
if self.checker is None:
706
# Escape attributes for the shell
707
escaped_attrs = dict(
708
(attr, re.escape(unicode(getattr(self, attr))))
709
for attr in
710
self.runtime_expansions)
711
530
try:
712
command = self.checker_command % escaped_attrs
713
except TypeError as error:
714
logger.error('Could not format string "%s"',
715
self.checker_command, exc_info=error)
716
return True # Try again later
531
# In case checker_command has exactly one % operator
532
command = self.checker_command % self.host
533
except TypeError:
534
# Escape attributes for the shell
535
escaped_attrs = dict(
536
(attr,
537
re.escape(unicode(str(getattr(self, attr, "")),
538
errors=
539
'replace')))
540
for attr in
541
self.runtime_expansions)
542
543
try:
544
command = self.checker_command % escaped_attrs
545
except TypeError as error:
546
logger.error('Could not format string "%s":'
547
' %s', self.checker_command, error)
548
return True # Try again later
717
549
self.current_checker_command = command
718
550
try:
719
551
logger.info("Starting checker %r for %s",
722
554
# in normal mode, that is already done by daemon(),
723
555
# and in debug mode we don't want to. (Stdin is
724
556
# always replaced by /dev/null.)
725
# The exception is when not debugging but nevertheless
726
# running in the foreground; use the previously
727
# created wnull.
728
popen_args = {}
729
if (not self.server_settings["debug"]
730
and self.server_settings["foreground"]):
731
popen_args.update({"stdout": wnull,
732
"stderr": wnull })
733
557
self.checker = subprocess.Popen(command,
734
558
close_fds=True,
735
shell=True, cwd="/",
736
**popen_args)
737
except OSError as error:
738
logger.error("Failed to start subprocess",
739
exc_info=error)
740
return True
741
self.checker_callback_tag = (gobject.child_watch_add
742
(self.checker.pid,
743
self.checker_callback,
744
data=command))
745
# The checker may have completed before the gobject
746
# watch was added. Check for this.
747
try:
559
shell=True, cwd="/")
560
self.checker_callback_tag = (gobject.child_watch_add
561
(self.checker.pid,
562
self.checker_callback,
563
data=command))
564
# The checker may have completed before the gobject
565
# watch was added. Check for this.
748
566
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
567
if pid:
568
gobject.source_remove(self.checker_callback_tag)
569
self.checker_callback(pid, status, command)
749
570
except OSError as error:
750
if error.errno == errno.ECHILD:
751
# This should never happen
752
logger.error("Child process vanished",
753
exc_info=error)
754
return True
755
raise
756
if pid:
757
gobject.source_remove(self.checker_callback_tag)
758
self.checker_callback(pid, status, command)
571
logger.error("Failed to start subprocess: %s",
572
error)
759
573
# Re-run this periodically if run by gobject.timeout_add
760
574
return True
761
575
768
582
return
769
583
logger.debug("Stopping checker for %(name)s", vars(self))
770
584
try:
771
self.checker.terminate()
585
os.kill(self.checker.pid, signal.SIGTERM)
772
586
#time.sleep(0.5)
773
587
#if self.checker.poll() is None:
774
# self.checker.kill()
588
# os.kill(self.checker.pid, signal.SIGKILL)
775
589
except OSError as error:
776
590
if error.errno != errno.ESRCH: # No such process
777
591
raise
778
592
self.checker = None
779
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
780
640
781
641
def dbus_service_property(dbus_interface, signature="v",
782
642
access="readwrite", byte_arrays=False):
794
654
# "Set" method, so we fail early here:
795
655
if byte_arrays and signature != "ay":
796
656
raise ValueError("Byte arrays not supported for non-'ay'"
797
" signature {0!r}".format(signature))
657
" signature %r" % signature)
798
658
def decorator(func):
799
659
func._dbus_is_property = True
800
660
func._dbus_interface = dbus_interface
808
668
return decorator
809
669
810
670
811
def dbus_interface_annotations(dbus_interface):
812
"""Decorator for marking functions returning interface annotations
813
814
Usage:
815
816
@dbus_interface_annotations("org.example.Interface")
817
def _foo(self): # Function name does not matter
818
return {"org.freedesktop.DBus.Deprecated": "true",
819
"org.freedesktop.DBus.Property.EmitsChangedSignal":
820
"false"}
821
"""
822
def decorator(func):
823
func._dbus_is_interface = True
824
func._dbus_interface = dbus_interface
825
func._dbus_name = dbus_interface
826
return func
827
return decorator
828
829
830
def dbus_annotations(annotations):
831
"""Decorator to annotate D-Bus methods, signals or properties
832
Usage:
833
834
@dbus_service_property("org.example.Interface", signature="b",
835
access="r")
836
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
837
"org.freedesktop.DBus.Property."
838
"EmitsChangedSignal": "false"})
839
def Property_dbus_property(self):
840
return dbus.Boolean(False)
841
"""
842
def decorator(func):
843
func._dbus_annotations = annotations
844
return func
845
return decorator
846
847
848
671
class DBusPropertyException(dbus.exceptions.DBusException):
849
672
"""A base class for D-Bus property-related exceptions
850
673
"""
873
696
"""
874
697
875
698
@staticmethod
876
def _is_dbus_thing(thing):
877
"""Returns a function testing if an attribute is a D-Bus thing
878
879
If called like _is_dbus_thing("method") it returns a function
880
suitable for use as predicate to inspect.getmembers().
881
"""
882
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
883
False)
699
def _is_dbus_property(obj):
700
return getattr(obj, "_dbus_is_property", False)
884
701
885
def _get_all_dbus_things(self, thing):
702
def _get_all_dbus_properties(self):
886
703
"""Returns a generator of (name, attribute) pairs
887
704
"""
888
return ((getattr(athing.__get__(self), "_dbus_name",
889
name),
890
athing.__get__(self))
705
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
891
706
for cls in self.__class__.__mro__
892
for name, athing in
893
inspect.getmembers(cls,
894
self._is_dbus_thing(thing)))
707
for name, prop in
708
inspect.getmembers(cls, self._is_dbus_property))
895
709
896
710
def _get_dbus_property(self, interface_name, property_name):
897
711
"""Returns a bound method if one exists which is a D-Bus
899
713
"""
900
714
for cls in self.__class__.__mro__:
901
715
for name, value in (inspect.getmembers
902
(cls,
903
self._is_dbus_thing("property"))):
716
(cls, self._is_dbus_property)):
904
717
if (value._dbus_name == property_name
905
718
and value._dbus_interface == interface_name):
906
719
return value.__get__(self)
934
747
# The byte_arrays option is not supported yet on
935
748
# signatures other than "ay".
936
749
if prop._dbus_signature != "ay":
937
raise ValueError("Byte arrays not supported for non-"
938
"'ay' signature {0!r}"
939
.format(prop._dbus_signature))
940
value = dbus.ByteArray(b''.join(chr(byte)
941
for byte in value))
750
raise ValueError
751
value = dbus.ByteArray(''.join(unichr(byte)
752
for byte in value))
942
753
prop(value)
943
754
944
755
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
949
760
950
761
Note: Will not include properties with access="write".
951
762
"""
952
properties = {}
953
for name, prop in self._get_all_dbus_things("property"):
763
all = {}
764
for name, prop in self._get_all_dbus_properties():
954
765
if (interface_name
955
766
and interface_name != prop._dbus_interface):
956
767
# Interface non-empty but did not match
960
771
continue
961
772
value = prop()
962
773
if not hasattr(value, "variant_level"):
963
properties[name] = value
774
all[name] = value
964
775
continue
965
properties[name] = type(value)(value, variant_level=
966
value.variant_level+1)
967
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")
968
779
969
780
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
970
781
out_signature="s",
971
782
path_keyword='object_path',
972
783
connection_keyword='connection')
973
784
def Introspect(self, object_path, connection):
974
"""Overloading of standard D-Bus method.
975
976
Inserts property tags and interface annotation tags.
785
"""Standard D-Bus method, overloaded to insert property tags.
977
786
"""
978
787
xmlstring = dbus.service.Object.Introspect(self, object_path,
979
788
connection)
986
795
e.setAttribute("access", prop._dbus_access)
987
796
return e
988
797
for if_tag in document.getElementsByTagName("interface"):
989
# Add property tags
990
798
for tag in (make_tag(document, name, prop)
991
799
for name, prop
992
in self._get_all_dbus_things("property")
800
in self._get_all_dbus_properties()
993
801
if prop._dbus_interface
994
802
== if_tag.getAttribute("name")):
995
803
if_tag.appendChild(tag)
996
# Add annotation tags
997
for typ in ("method", "signal", "property"):
998
for tag in if_tag.getElementsByTagName(typ):
999
annots = dict()
1000
for name, prop in (self.
1001
_get_all_dbus_things(typ)):
1002
if (name == tag.getAttribute("name")
1003
and prop._dbus_interface
1004
== if_tag.getAttribute("name")):
1005
annots.update(getattr
1006
(prop,
1007
"_dbus_annotations",
1008
{}))
1009
for name, value in annots.iteritems():
1010
ann_tag = document.createElement(
1011
"annotation")
1012
ann_tag.setAttribute("name", name)
1013
ann_tag.setAttribute("value", value)
1014
tag.appendChild(ann_tag)
1015
# Add interface annotation tags
1016
for annotation, value in dict(
1017
itertools.chain.from_iterable(
1018
annotations().iteritems()
1019
for name, annotations in
1020
self._get_all_dbus_things("interface")
1021
if name == if_tag.getAttribute("name")
1022
)).iteritems():
1023
ann_tag = document.createElement("annotation")
1024
ann_tag.setAttribute("name", annotation)
1025
ann_tag.setAttribute("value", value)
1026
if_tag.appendChild(ann_tag)
1027
804
# Add the names to the return values for the
1028
805
# "org.freedesktop.DBus.Properties" methods
1029
806
if (if_tag.getAttribute("name")
1044
821
except (AttributeError, xml.dom.DOMException,
1045
822
xml.parsers.expat.ExpatError) as error:
1046
823
logger.error("Failed to override Introspection method",
1047
exc_info=error)
824
error)
1048
825
return xmlstring
1049
826
1050
827
1051
def datetime_to_dbus(dt, variant_level=0):
828
def datetime_to_dbus (dt, variant_level=0):
1052
829
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1053
830
if dt is None:
1054
831
return dbus.String("", variant_level = variant_level)
1055
832
return dbus.String(dt.isoformat(),
1056
833
variant_level=variant_level)
1057
834
1058
1059
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1060
"""A class decorator; applied to a subclass of
1061
dbus.service.Object, it will add alternate D-Bus attributes with
1062
interface names according to the "alt_interface_names" mapping.
1063
Usage:
1064
1065
@alternate_dbus_interfaces({"org.example.Interface":
1066
"net.example.AlternateInterface"})
1067
class SampleDBusObject(dbus.service.Object):
1068
@dbus.service.method("org.example.Interface")
1069
def SampleDBusMethod():
1070
pass
1071
1072
The above "SampleDBusMethod" on "SampleDBusObject" will be
1073
reachable via two interfaces: "org.example.Interface" and
1074
"net.example.AlternateInterface", the latter of which will have
1075
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1076
"true", unless "deprecate" is passed with a False value.
1077
1078
This works for methods and signals, and also for D-Bus properties
1079
(from DBusObjectWithProperties) and interfaces (from the
1080
dbus_interface_annotations decorator).
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.
1081
839
"""
1082
def wrapper(cls):
1083
for orig_interface_name, alt_interface_name in (
1084
alt_interface_names.iteritems()):
1085
attr = {}
1086
interface_names = set()
1087
# Go though all attributes of the class
1088
for attrname, attribute in inspect.getmembers(cls):
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):
1089
847
# Ignore non-D-Bus attributes, and D-Bus attributes
1090
848
# with the wrong interface name
1091
849
if (not hasattr(attribute, "_dbus_interface")
1092
850
or not attribute._dbus_interface
1093
.startswith(orig_interface_name)):
851
.startswith("se.recompile.Mandos")):
1094
852
continue
1095
853
# Create an alternate D-Bus interface name based on
1096
854
# the current name
1097
855
alt_interface = (attribute._dbus_interface
1098
.replace(orig_interface_name,
1099
alt_interface_name))
1100
interface_names.add(alt_interface)
856
.replace("se.recompile.Mandos",
857
"se.bsnet.fukt.Mandos"))
1101
858
# Is this a D-Bus signal?
1102
859
if getattr(attribute, "_dbus_is_signal", False):
1103
# Extract the original non-method undecorated
1104
# function by black magic
860
# Extract the original non-method function by
861
# black magic
1105
862
nonmethod_func = (dict(
1106
863
zip(attribute.func_code.co_freevars,
1107
864
attribute.__closure__))["func"]
1118
875
nonmethod_func.func_name,
1119
876
nonmethod_func.func_defaults,
1120
877
nonmethod_func.func_closure)))
1121
# Copy annotations, if any
1122
try:
1123
new_function._dbus_annotations = (
1124
dict(attribute._dbus_annotations))
1125
except AttributeError:
1126
pass
1127
878
# Define a creator of a function to call both the
1128
# original and alternate functions, so both the
1129
# original and alternate signals gets sent when
1130
# the function is called
879
# old and new functions, so both the old and new
880
# signals gets sent when the function is called
1131
881
def fixscope(func1, func2):
1132
882
"""This function is a scope container to pass
1133
883
func1 and func2 to the "call_both" function
1140
890
return call_both
1141
891
# Create the "call_both" function and add it to
1142
892
# the class
1143
attr[attrname] = fixscope(attribute, new_function)
893
attr[attrname] = fixscope(attribute,
894
new_function)
1144
895
# Is this a D-Bus method?
1145
896
elif getattr(attribute, "_dbus_is_method", False):
1146
897
# Create a new, but exactly alike, function
1157
908
attribute.func_name,
1158
909
attribute.func_defaults,
1159
910
attribute.func_closure)))
1160
# Copy annotations, if any
1161
try:
1162
attr[attrname]._dbus_annotations = (
1163
dict(attribute._dbus_annotations))
1164
except AttributeError:
1165
pass
1166
911
# Is this a D-Bus property?
1167
912
elif getattr(attribute, "_dbus_is_property", False):
1168
913
# Create a new, but exactly alike, function
1182
927
attribute.func_name,
1183
928
attribute.func_defaults,
1184
929
attribute.func_closure)))
1185
# Copy annotations, if any
1186
try:
1187
attr[attrname]._dbus_annotations = (
1188
dict(attribute._dbus_annotations))
1189
except AttributeError:
1190
pass
1191
# Is this a D-Bus interface?
1192
elif getattr(attribute, "_dbus_is_interface", False):
1193
# Create a new, but exactly alike, function
1194
# object. Decorate it to be a new D-Bus interface
1195
# with the alternate D-Bus interface name. Add it
1196
# to the class.
1197
attr[attrname] = (dbus_interface_annotations
1198
(alt_interface)
1199
(types.FunctionType
1200
(attribute.func_code,
1201
attribute.func_globals,
1202
attribute.func_name,
1203
attribute.func_defaults,
1204
attribute.func_closure)))
1205
if deprecate:
1206
# Deprecate all alternate interfaces
1207
iname="_AlternateDBusNames_interface_annotation{0}"
1208
for interface_name in interface_names:
1209
@dbus_interface_annotations(interface_name)
1210
def func(self):
1211
return { "org.freedesktop.DBus.Deprecated":
1212
"true" }
1213
# Find an unused name
1214
for aname in (iname.format(i)
1215
for i in itertools.count()):
1216
if aname not in attr:
1217
attr[aname] = func
1218
break
1219
if interface_names:
1220
# Replace the class with a new subclass of it with
1221
# methods, signals, etc. as created above.
1222
cls = type(b"{0}Alternate".format(cls.__name__),
1223
(cls,), attr)
1224
return cls
1225
return wrapper
1226
1227
1228
@alternate_dbus_interfaces({"se.recompile.Mandos":
1229
"se.bsnet.fukt.Mandos"})
930
return type.__new__(mcs, name, bases, attr)
931
1230
932
class ClientDBus(Client, DBusObjectWithProperties):
1231
933
"""A Client class using D-Bus
1232
934
1243
945
def __init__(self, bus = None, *args, **kwargs):
1244
946
self.bus = bus
1245
947
Client.__init__(self, *args, **kwargs)
948
949
self._approvals_pending = 0
1246
950
# Only now, when this client is initialized, can it show up on
1247
951
# the D-Bus
1248
952
client_object_name = unicode(self.name).translate(
1252
956
("/clients/" + client_object_name))
1253
957
DBusObjectWithProperties.__init__(self, self.bus,
1254
958
self.dbus_object_path)
1255
959
1256
960
def notifychangeproperty(transform_func,
1257
961
dbus_name, type_func=lambda x: x,
1258
962
variant_level=1):
1259
963
""" Modify a variable so that it's a property which announces
1260
964
its changes to DBus.
1261
965
1262
966
transform_fun: Function that takes a value and a variant_level
1263
967
and transforms it to a D-Bus type.
1264
968
dbus_name: D-Bus name of the variable
1281
985
1282
986
return property(lambda self: getattr(self, attrname), setter)
1283
987
988
1284
989
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1285
990
approvals_pending = notifychangeproperty(dbus.Boolean,
1286
991
"ApprovalPending",
1293
998
checker is not None)
1294
999
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1295
1000
"LastCheckedOK")
1296
last_checker_status = notifychangeproperty(dbus.Int16,
1297
"LastCheckerStatus")
1298
1001
last_approval_request = notifychangeproperty(
1299
1002
datetime_to_dbus, "LastApprovalRequest")
1300
1003
approved_by_default = notifychangeproperty(dbus.Boolean,
1301
1004
"ApprovedByDefault")
1302
approval_delay = notifychangeproperty(dbus.UInt64,
1005
approval_delay = notifychangeproperty(dbus.UInt16,
1303
1006
"ApprovalDelay",
1304
1007
type_func =
1305
timedelta_to_milliseconds)
1008
_timedelta_to_milliseconds)
1306
1009
approval_duration = notifychangeproperty(
1307
dbus.UInt64, "ApprovalDuration",
1308
type_func = timedelta_to_milliseconds)
1010
dbus.UInt16, "ApprovalDuration",
1011
type_func = _timedelta_to_milliseconds)
1309
1012
host = notifychangeproperty(dbus.String, "Host")
1310
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1013
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1311
1014
type_func =
1312
timedelta_to_milliseconds)
1015
_timedelta_to_milliseconds)
1313
1016
extended_timeout = notifychangeproperty(
1314
dbus.UInt64, "ExtendedTimeout",
1315
type_func = timedelta_to_milliseconds)
1316
interval = notifychangeproperty(dbus.UInt64,
1017
dbus.UInt16, "ExtendedTimeout",
1018
type_func = _timedelta_to_milliseconds)
1019
interval = notifychangeproperty(dbus.UInt16,
1317
1020
"Interval",
1318
1021
type_func =
1319
timedelta_to_milliseconds)
1022
_timedelta_to_milliseconds)
1320
1023
checker_command = notifychangeproperty(dbus.String, "Checker")
1321
1024
1322
1025
del notifychangeproperty
1364
1067
return r
1365
1068
1366
1069
def _reset_approved(self):
1367
self.approved = None
1070
self._approved = None
1368
1071
return False
1369
1072
1370
1073
def approve(self, value=True):
1371
self.approved = value
1372
gobject.timeout_add(timedelta_to_milliseconds
1074
self.send_changedstate()
1075
self._approved = value
1076
gobject.timeout_add(_timedelta_to_milliseconds
1373
1077
(self.approval_duration),
1374
1078
self._reset_approved)
1375
self.send_changedstate()
1079
1376
1080
1377
1081
## D-Bus methods, signals & properties
1378
1082
_interface = "se.recompile.Mandos.Client"
1379
1083
1380
## Interfaces
1381
1382
@dbus_interface_annotations(_interface)
1383
def _foo(self):
1384
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1385
"false"}
1386
1387
1084
## Signals
1388
1085
1389
1086
# CheckerCompleted - signal
1488
1185
access="readwrite")
1489
1186
def ApprovalDuration_dbus_property(self, value=None):
1490
1187
if value is None: # get
1491
return dbus.UInt64(timedelta_to_milliseconds(
1188
return dbus.UInt64(_timedelta_to_milliseconds(
1492
1189
self.approval_duration))
1493
1190
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1494
1191
1508
1205
def Host_dbus_property(self, value=None):
1509
1206
if value is None: # get
1510
1207
return dbus.String(self.host)
1511
self.host = unicode(value)
1208
self.host = value
1512
1209
1513
1210
# Created - property
1514
1211
@dbus_service_property(_interface, signature="s", access="read")
1515
1212
def Created_dbus_property(self):
1516
return datetime_to_dbus(self.created)
1213
return dbus.String(datetime_to_dbus(self.created))
1517
1214
1518
1215
# LastEnabled - property
1519
1216
@dbus_service_property(_interface, signature="s", access="read")
1540
1237
return
1541
1238
return datetime_to_dbus(self.last_checked_ok)
1542
1239
1543
# LastCheckerStatus - property
1544
@dbus_service_property(_interface, signature="n",
1545
access="read")
1546
def LastCheckerStatus_dbus_property(self):
1547
return dbus.Int16(self.last_checker_status)
1548
1549
1240
# Expires - property
1550
1241
@dbus_service_property(_interface, signature="s", access="read")
1551
1242
def Expires_dbus_property(self):
1562
1253
def Timeout_dbus_property(self, value=None):
1563
1254
if value is None: # get
1564
1255
return dbus.UInt64(self.timeout_milliseconds())
1565
old_timeout = self.timeout
1566
1256
self.timeout = datetime.timedelta(0, 0, 0, value)
1567
# Reschedule disabling
1568
if self.enabled:
1569
now = datetime.datetime.utcnow()
1570
self.expires += self.timeout - old_timeout
1571
if self.expires <= now:
1572
# The timeout has passed
1573
self.disable()
1574
else:
1575
if (getattr(self, "disable_initiator_tag", None)
1576
is None):
1577
return
1578
gobject.source_remove(self.disable_initiator_tag)
1579
self.disable_initiator_tag = (
1580
gobject.timeout_add(
1581
timedelta_to_milliseconds(self.expires - now),
1582
self.disable))
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))
1583
1277
1584
1278
# ExtendedTimeout - property
1585
1279
@dbus_service_property(_interface, signature="t",
1598
1292
self.interval = datetime.timedelta(0, 0, 0, value)
1599
1293
if getattr(self, "checker_initiator_tag", None) is None:
1600
1294
return
1601
if self.enabled:
1602
# Reschedule checker run
1603
gobject.source_remove(self.checker_initiator_tag)
1604
self.checker_initiator_tag = (gobject.timeout_add
1605
(value, self.start_checker))
1606
self.start_checker() # Start one now, too
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
1607
1300
1608
1301
# Checker - property
1609
1302
@dbus_service_property(_interface, signature="s",
1611
1304
def Checker_dbus_property(self, value=None):
1612
1305
if value is None: # get
1613
1306
return dbus.String(self.checker_command)
1614
self.checker_command = unicode(value)
1307
self.checker_command = value
1615
1308
1616
1309
# CheckerRunning - property
1617
1310
@dbus_service_property(_interface, signature="b",
1646
1339
raise KeyError()
1647
1340
1648
1341
def __getattribute__(self, name):
1649
if name == '_pipe':
1342
if(name == '_pipe'):
1650
1343
return super(ProxyClient, self).__getattribute__(name)
1651
1344
self._pipe.send(('getattr', name))
1652
1345
data = self._pipe.recv()
1659
1352
return func
1660
1353
1661
1354
def __setattr__(self, name, value):
1662
if name == '_pipe':
1355
if(name == '_pipe'):
1663
1356
return super(ProxyClient, self).__setattr__(name, value)
1664
1357
self._pipe.send(('setattr', name, value))
1665
1358
1359
class ClientDBusTransitional(ClientDBus):
1360
__metaclass__ = AlternateDBusNamesMetaclass
1666
1361
1667
1362
class ClientHandler(socketserver.BaseRequestHandler, object):
1668
1363
"""A class to handle client connections.
1705
1400
logger.debug("Protocol version: %r", line)
1706
1401
try:
1707
1402
if int(line.strip().split()[0]) > 1:
1708
raise RuntimeError(line)
1403
raise RuntimeError
1709
1404
except (ValueError, IndexError, RuntimeError) as error:
1710
1405
logger.error("Unknown protocol version: %s", error)
1711
1406
return
1751
1446
client.Rejected("Disabled")
1752
1447
return
1753
1448
1754
if client.approved or not client.approval_delay:
1449
if client._approved or not client.approval_delay:
1755
1450
#We are approved or approval is disabled
1756
1451
break
1757
elif client.approved is None:
1452
elif client._approved is None:
1758
1453
logger.info("Client %s needs approval",
1759
1454
client.name)
1760
1455
if self.server.use_dbus:
1773
1468
#wait until timeout or approved
1774
1469
time = datetime.datetime.now()
1775
1470
client.changedstate.acquire()
1776
client.changedstate.wait(
1777
float(timedelta_to_milliseconds(delay)
1778
/ 1000))
1471
(client.changedstate.wait
1472
(float(client._timedelta_to_milliseconds(delay)
1473
/ 1000)))
1779
1474
client.changedstate.release()
1780
1475
time2 = datetime.datetime.now()
1781
1476
if (time2 - time) >= delay:
1797
1492
try:
1798
1493
sent = session.send(client.secret[sent_size:])
1799
1494
except gnutls.errors.GNUTLSError as error:
1800
logger.warning("gnutls send failed",
1801
exc_info=error)
1495
logger.warning("gnutls send failed")
1802
1496
return
1803
1497
logger.debug("Sent: %d, remaining: %d",
1804
1498
sent, len(client.secret)
1807
1501
1808
1502
logger.info("Sending secret to %s", client.name)
1809
1503
# bump the timeout using extended_timeout
1810
client.bump_timeout(client.extended_timeout)
1504
client.checked_ok(client.extended_timeout)
1811
1505
if self.server.use_dbus:
1812
1506
# Emit D-Bus signal
1813
1507
client.GotSecret()
1818
1512
try:
1819
1513
session.bye()
1820
1514
except gnutls.errors.GNUTLSError as error:
1821
logger.warning("GnuTLS bye failed",
1822
exc_info=error)
1515
logger.warning("GnuTLS bye failed")
1823
1516
1824
1517
@staticmethod
1825
1518
def peer_certificate(session):
1881
1574
# Convert the buffer to a Python bytestring
1882
1575
fpr = ctypes.string_at(buf, buf_len.value)
1883
1576
# Convert the bytestring to hexadecimal notation
1884
hex_fpr = binascii.hexlify(fpr).upper()
1577
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1885
1578
return hex_fpr
1886
1579
1887
1580
1890
1583
def sub_process_main(self, request, address):
1891
1584
try:
1892
1585
self.finish_request(request, address)
1893
except Exception:
1586
except:
1894
1587
self.handle_error(request, address)
1895
1588
self.close_request(request)
1896
1589
1897
1590
def process_request(self, request, address):
1898
1591
"""Start a new process to process the request."""
1899
1592
proc = multiprocessing.Process(target = self.sub_process_main,
1900
args = (request, address))
1593
args = (request,
1594
address))
1901
1595
proc.start()
1902
1596
return proc
1903
1597
1918
1612
1919
1613
def add_pipe(self, parent_pipe, proc):
1920
1614
"""Dummy function; override as necessary"""
1921
raise NotImplementedError()
1615
raise NotImplementedError
1922
1616
1923
1617
1924
1618
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1931
1625
use_ipv6: Boolean; to use IPv6 or not
1932
1626
"""
1933
1627
def __init__(self, server_address, RequestHandlerClass,
1934
interface=None, use_ipv6=True, socketfd=None):
1935
"""If socketfd is set, use that file descriptor instead of
1936
creating a new one with socket.socket().
1937
"""
1628
interface=None, use_ipv6=True):
1938
1629
self.interface = interface
1939
1630
if use_ipv6:
1940
1631
self.address_family = socket.AF_INET6
1941
if socketfd is not None:
1942
# Save the file descriptor
1943
self.socketfd = socketfd
1944
# Save the original socket.socket() function
1945
self.socket_socket = socket.socket
1946
# To implement --socket, we monkey patch socket.socket.
1947
#
1948
# (When socketserver.TCPServer is a new-style class, we
1949
# could make self.socket into a property instead of monkey
1950
# patching socket.socket.)
1951
#
1952
# Create a one-time-only replacement for socket.socket()
1953
@functools.wraps(socket.socket)
1954
def socket_wrapper(*args, **kwargs):
1955
# Restore original function so subsequent calls are
1956
# not affected.
1957
socket.socket = self.socket_socket
1958
del self.socket_socket
1959
# This time only, return a new socket object from the
1960
# saved file descriptor.
1961
return socket.fromfd(self.socketfd, *args, **kwargs)
1962
# Replace socket.socket() function with wrapper
1963
socket.socket = socket_wrapper
1964
# The socketserver.TCPServer.__init__ will call
1965
# socket.socket(), which might be our replacement,
1966
# socket_wrapper(), if socketfd was set.
1967
1632
socketserver.TCPServer.__init__(self, server_address,
1968
1633
RequestHandlerClass)
1969
1970
1634
def server_bind(self):
1971
1635
"""This overrides the normal server_bind() function
1972
1636
to bind to an interface if one was specified, and also NOT to
1980
1644
try:
1981
1645
self.socket.setsockopt(socket.SOL_SOCKET,
1982
1646
SO_BINDTODEVICE,
1983
str(self.interface + '\0'))
1647
str(self.interface
1648
+ '\0'))
1984
1649
except socket.error as error:
1985
if error.errno == errno.EPERM:
1986
logger.error("No permission to bind to"
1987
" interface %s", self.interface)
1988
elif error.errno == errno.ENOPROTOOPT:
1650
if error[0] == errno.EPERM:
1651
logger.error("No permission to"
1652
" bind to interface %s",
1653
self.interface)
1654
elif error[0] == errno.ENOPROTOOPT:
1989
1655
logger.error("SO_BINDTODEVICE not available;"
1990
1656
" cannot bind to interface %s",
1991
1657
self.interface)
1992
elif error.errno == errno.ENODEV:
1993
logger.error("Interface %s does not exist,"
1994
" cannot bind", self.interface)
1995
1658
else:
1996
1659
raise
1997
1660
# Only bind(2) the socket if we really need to.
2000
1663
if self.address_family == socket.AF_INET6:
2001
1664
any_address = "::" # in6addr_any
2002
1665
else:
2003
any_address = "0.0.0.0" # INADDR_ANY
1666
any_address = socket.INADDR_ANY
2004
1667
self.server_address = (any_address,
2005
1668
self.server_address[1])
2006
1669
elif not self.server_address[1]:
2027
1690
"""
2028
1691
def __init__(self, server_address, RequestHandlerClass,
2029
1692
interface=None, use_ipv6=True, clients=None,
2030
gnutls_priority=None, use_dbus=True, socketfd=None):
1693
gnutls_priority=None, use_dbus=True):
2031
1694
self.enabled = False
2032
1695
self.clients = clients
2033
1696
if self.clients is None:
2037
1700
IPv6_TCPServer.__init__(self, server_address,
2038
1701
RequestHandlerClass,
2039
1702
interface = interface,
2040
use_ipv6 = use_ipv6,
2041
socketfd = socketfd)
1703
use_ipv6 = use_ipv6)
2042
1704
def server_activate(self):
2043
1705
if self.enabled:
2044
1706
return socketserver.TCPServer.server_activate(self)
2057
1719
2058
1720
def handle_ipc(self, source, condition, parent_pipe=None,
2059
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)
2060
1736
# error, or the other end of multiprocessing.Pipe has closed
2061
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1737
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2062
1738
# Wait for other process to exit
2063
1739
proc.join()
2064
1740
return False
2122
1798
return True
2123
1799
2124
1800
2125
def rfc3339_duration_to_delta(duration):
2126
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2127
2128
>>> rfc3339_duration_to_delta("P7D")
2129
datetime.timedelta(7)
2130
>>> rfc3339_duration_to_delta("PT60S")
2131
datetime.timedelta(0, 60)
2132
>>> rfc3339_duration_to_delta("PT60M")
2133
datetime.timedelta(0, 3600)
2134
>>> rfc3339_duration_to_delta("PT24H")
2135
datetime.timedelta(1)
2136
>>> rfc3339_duration_to_delta("P1W")
2137
datetime.timedelta(7)
2138
>>> rfc3339_duration_to_delta("PT5M30S")
2139
datetime.timedelta(0, 330)
2140
>>> rfc3339_duration_to_delta("P1DT3M20S")
2141
datetime.timedelta(1, 200)
2142
"""
2143
2144
# Parsing an RFC 3339 duration with regular expressions is not
2145
# possible - there would have to be multiple places for the same
2146
# values, like seconds. The current code, while more esoteric, is
2147
# cleaner without depending on a parsing library. If Python had a
2148
# built-in library for parsing we would use it, but we'd like to
2149
# avoid excessive use of external libraries.
2150
2151
# New type for defining tokens, syntax, and semantics all-in-one
2152
Token = collections.namedtuple("Token",
2153
("regexp", # To match token; if
2154
# "value" is not None,
2155
# must have a "group"
2156
# containing digits
2157
"value", # datetime.timedelta or
2158
# None
2159
"followers")) # Tokens valid after
2160
# this token
2161
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2162
# the "duration" ABNF definition in RFC 3339, Appendix A.
2163
token_end = Token(re.compile(r"$"), None, frozenset())
2164
token_second = Token(re.compile(r"(\d+)S"),
2165
datetime.timedelta(seconds=1),
2166
frozenset((token_end,)))
2167
token_minute = Token(re.compile(r"(\d+)M"),
2168
datetime.timedelta(minutes=1),
2169
frozenset((token_second, token_end)))
2170
token_hour = Token(re.compile(r"(\d+)H"),
2171
datetime.timedelta(hours=1),
2172
frozenset((token_minute, token_end)))
2173
token_time = Token(re.compile(r"T"),
2174
None,
2175
frozenset((token_hour, token_minute,
2176
token_second)))
2177
token_day = Token(re.compile(r"(\d+)D"),
2178
datetime.timedelta(days=1),
2179
frozenset((token_time, token_end)))
2180
token_month = Token(re.compile(r"(\d+)M"),
2181
datetime.timedelta(weeks=4),
2182
frozenset((token_day, token_end)))
2183
token_year = Token(re.compile(r"(\d+)Y"),
2184
datetime.timedelta(weeks=52),
2185
frozenset((token_month, token_end)))
2186
token_week = Token(re.compile(r"(\d+)W"),
2187
datetime.timedelta(weeks=1),
2188
frozenset((token_end,)))
2189
token_duration = Token(re.compile(r"P"), None,
2190
frozenset((token_year, token_month,
2191
token_day, token_time,
2192
token_week))),
2193
# Define starting values
2194
value = datetime.timedelta() # Value so far
2195
found_token = None
2196
followers = frozenset(token_duration,) # Following valid tokens
2197
s = duration # String left to parse
2198
# Loop until end token is found
2199
while found_token is not token_end:
2200
# Search for any currently valid tokens
2201
for token in followers:
2202
match = token.regexp.match(s)
2203
if match is not None:
2204
# Token found
2205
if token.value is not None:
2206
# Value found, parse digits
2207
factor = int(match.group(1), 10)
2208
# Add to value so far
2209
value += factor * token.value
2210
# Strip token from string
2211
s = token.regexp.sub("", s, 1)
2212
# Go to found token
2213
found_token = token
2214
# Set valid next tokens
2215
followers = found_token.followers
2216
break
2217
else:
2218
# No currently valid tokens were found
2219
raise ValueError("Invalid RFC 3339 duration")
2220
# End token found
2221
return value
2222
2223
2224
1801
def string_to_delta(interval):
2225
1802
"""Parse a string and return a datetime.timedelta
2226
1803
2237
1814
>>> string_to_delta('5m 30s')
2238
1815
datetime.timedelta(0, 330)
2239
1816
"""
2240
2241
try:
2242
return rfc3339_duration_to_delta(interval)
2243
except ValueError:
2244
pass
2245
2246
1817
timevalue = datetime.timedelta(0)
2247
1818
for s in interval.split():
2248
1819
try:
2259
1830
elif suffix == "w":
2260
1831
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2261
1832
else:
2262
raise ValueError("Unknown suffix {0!r}"
2263
.format(suffix))
2264
except IndexError as e:
1833
raise ValueError("Unknown suffix %r" % suffix)
1834
except (ValueError, IndexError) as e:
2265
1835
raise ValueError(*(e.args))
2266
1836
timevalue += delta
2267
1837
return timevalue
2268
1838
2269
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
2270
1864
def daemon(nochdir = False, noclose = False):
2271
1865
"""See daemon(3). Standard BSD Unix function.
2272
1866
2280
1874
sys.exit()
2281
1875
if not noclose:
2282
1876
# Close all standard open file descriptors
2283
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1877
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2284
1878
if not stat.S_ISCHR(os.fstat(null).st_mode):
2285
1879
raise OSError(errno.ENODEV,
2286
"{0} not a character device"
2287
.format(os.devnull))
1880
"%s not a character device"
1881
% os.path.devnull)
2288
1882
os.dup2(null, sys.stdin.fileno())
2289
1883
os.dup2(null, sys.stdout.fileno())
2290
1884
os.dup2(null, sys.stderr.fileno())
2299
1893
2300
1894
parser = argparse.ArgumentParser()
2301
1895
parser.add_argument("-v", "--version", action="version",
2302
version = "%(prog)s {0}".format(version),
1896
version = "%%(prog)s %s" % version,
2303
1897
help="show version number and exit")
2304
1898
parser.add_argument("-i", "--interface", metavar="IF",
2305
1899
help="Bind to interface IF")
2311
1905
help="Run self-test")
2312
1906
parser.add_argument("--debug", action="store_true",
2313
1907
help="Debug mode; run in foreground and log"
2314
" to terminal", default=None)
1908
" to terminal")
2315
1909
parser.add_argument("--debuglevel", metavar="LEVEL",
2316
1910
help="Debug level for stdout output")
2317
1911
parser.add_argument("--priority", help="GnuTLS"
2324
1918
" files")
2325
1919
parser.add_argument("--no-dbus", action="store_false",
2326
1920
dest="use_dbus", help="Do not provide D-Bus"
2327
" system bus interface", default=None)
1921
" system bus interface")
2328
1922
parser.add_argument("--no-ipv6", action="store_false",
2329
dest="use_ipv6", help="Do not use IPv6",
2330
default=None)
1923
dest="use_ipv6", help="Do not use IPv6")
2331
1924
parser.add_argument("--no-restore", action="store_false",
2332
dest="restore", help="Do not restore stored"
2333
" state", default=None)
2334
parser.add_argument("--socket", type=int,
2335
help="Specify a file descriptor to a network"
2336
" socket to use instead of creating one")
2337
parser.add_argument("--statedir", metavar="DIR",
2338
help="Directory to save/restore state in")
2339
parser.add_argument("--foreground", action="store_true",
2340
help="Run in foreground", default=None)
2341
1925
dest="restore", help="Do not restore stored state",
1926
default=True)
1927
2342
1928
options = parser.parse_args()
2343
1929
2344
1930
if options.check:
2352
1938
"port": "",
2353
1939
"debug": "False",
2354
1940
"priority":
2355
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1941
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2356
1942
"servicename": "Mandos",
2357
1943
"use_dbus": "True",
2358
1944
"use_ipv6": "True",
2359
1945
"debuglevel": "",
2360
"restore": "True",
2361
"socket": "",
2362
"statedir": "/var/lib/mandos",
2363
"foreground": "False",
2364
1946
}
2365
1947
2366
1948
# Parse config file for server-global settings
2371
1953
# Convert the SafeConfigParser object to a dict
2372
1954
server_settings = server_config.defaults()
2373
1955
# Use the appropriate methods on the non-string config options
2374
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1956
for option in ("debug", "use_dbus", "use_ipv6"):
2375
1957
server_settings[option] = server_config.getboolean("DEFAULT",
2376
1958
option)
2377
1959
if server_settings["port"]:
2378
1960
server_settings["port"] = server_config.getint("DEFAULT",
2379
1961
"port")
2380
if server_settings["socket"]:
2381
server_settings["socket"] = server_config.getint("DEFAULT",
2382
"socket")
2383
# Later, stdin will, and stdout and stderr might, be dup'ed
2384
# over with an opened os.devnull. But we don't want this to
2385
# happen with a supplied network socket.
2386
if 0 <= server_settings["socket"] <= 2:
2387
server_settings["socket"] = os.dup(server_settings
2388
["socket"])
2389
1962
del server_config
2390
1963
2391
1964
# Override the settings from the config file with command line
2392
1965
# options, if set.
2393
1966
for option in ("interface", "address", "port", "debug",
2394
1967
"priority", "servicename", "configdir",
2395
"use_dbus", "use_ipv6", "debuglevel", "restore",
2396
"statedir", "socket", "foreground"):
1968
"use_dbus", "use_ipv6", "debuglevel", "restore"):
2397
1969
value = getattr(options, option)
2398
1970
if value is not None:
2399
1971
server_settings[option] = value
2402
1974
for option in server_settings.keys():
2403
1975
if type(server_settings[option]) is str:
2404
1976
server_settings[option] = unicode(server_settings[option])
2405
# Force all boolean options to be boolean
2406
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2407
"foreground"):
2408
server_settings[option] = bool(server_settings[option])
2409
# Debug implies foreground
2410
if server_settings["debug"]:
2411
server_settings["foreground"] = True
2412
1977
# Now we have our good server settings in "server_settings"
2413
1978
2414
1979
##################################################################
2418
1983
debuglevel = server_settings["debuglevel"]
2419
1984
use_dbus = server_settings["use_dbus"]
2420
1985
use_ipv6 = server_settings["use_ipv6"]
2421
stored_state_path = os.path.join(server_settings["statedir"],
2422
stored_state_file)
2423
foreground = server_settings["foreground"]
2424
2425
if debug:
2426
initlogger(debug, logging.DEBUG)
2427
else:
2428
if not debuglevel:
2429
initlogger(debug)
2430
else:
2431
level = getattr(logging, debuglevel.upper())
2432
initlogger(debug, level)
2433
1986
2434
1987
if server_settings["servicename"] != "Mandos":
2435
1988
syslogger.setFormatter(logging.Formatter
2436
('Mandos ({0}) [%(process)d]:'
2437
' %(levelname)s: %(message)s'
2438
.format(server_settings
2439
["servicename"])))
1989
('Mandos (%s) [%%(process)d]:'
1990
' %%(levelname)s: %%(message)s'
1991
% server_settings["servicename"]))
2440
1992
2441
1993
# Parse config file with clients
2442
client_config = configparser.SafeConfigParser(Client
2443
.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)
2444
2003
client_config.read(os.path.join(server_settings["configdir"],
2445
2004
"clients.conf"))
2446
2005
2455
2014
use_ipv6=use_ipv6,
2456
2015
gnutls_priority=
2457
2016
server_settings["priority"],
2458
use_dbus=use_dbus,
2459
socketfd=(server_settings["socket"]
2460
or None))
2461
if not foreground:
2462
pidfilename = "/run/mandos.pid"
2463
if not os.path.isdir("/run/."):
2464
pidfilename = "/var/run/mandos.pid"
2465
pidfile = None
2017
use_dbus=use_dbus)
2018
if not debug:
2019
pidfilename = "/var/run/mandos.pid"
2466
2020
try:
2467
2021
pidfile = open(pidfilename, "w")
2468
except IOError as e:
2469
logger.error("Could not open file %r", pidfilename,
2470
exc_info=e)
2022
except IOError:
2023
logger.error("Could not open file %r", pidfilename)
2471
2024
2472
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:
2473
2029
try:
2474
uid = pwd.getpwnam(name).pw_uid
2475
gid = pwd.getpwnam(name).pw_gid
2476
break
2030
uid = pwd.getpwnam("mandos").pw_uid
2031
gid = pwd.getpwnam("mandos").pw_gid
2477
2032
except KeyError:
2478
continue
2479
else:
2480
uid = 65534
2481
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
2482
2039
try:
2483
2040
os.setgid(gid)
2484
2041
os.setuid(uid)
2485
2042
except OSError as error:
2486
if error.errno != errno.EPERM:
2487
raise
2043
if error[0] != errno.EPERM:
2044
raise error
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)
2488
2051
2489
2052
if debug:
2053
logger.setLevel(logging.DEBUG)
2490
2054
# Enable all possible GnuTLS debugging
2491
2055
2492
2056
# "Use a log level over 10 to enable all debugging options."
2501
2065
.gnutls_global_set_log_function(debug_gnutls))
2502
2066
2503
2067
# Redirect stdin so all checkers get /dev/null
2504
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2068
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2505
2069
os.dup2(null, sys.stdin.fileno())
2506
2070
if null > 2:
2507
2071
os.close(null)
2072
else:
2073
# No console logging
2074
logger.removeHandler(console)
2508
2075
2509
2076
# Need to fork before connecting to D-Bus
2510
if not foreground:
2077
if not debug:
2511
2078
# Close all input and output, do double fork, etc.
2512
2079
daemon()
2513
2080
2514
# multiprocessing will use threads, so before we use gobject we
2515
# need to inform gobject that threads will be used.
2516
gobject.threads_init()
2517
2518
2081
global main_loop
2519
2082
# From the Avahi example code
2520
DBusGMainLoop(set_as_default=True)
2083
DBusGMainLoop(set_as_default=True )
2521
2084
main_loop = gobject.MainLoop()
2522
2085
bus = dbus.SystemBus()
2523
2086
# End of Avahi example code
2529
2092
("se.bsnet.fukt.Mandos", bus,
2530
2093
do_not_queue=True))
2531
2094
except dbus.exceptions.NameExistsException as e:
2532
logger.error("Disabling D-Bus:", exc_info=e)
2095
logger.error(unicode(e) + ", disabling D-Bus")
2533
2096
use_dbus = False
2534
2097
server_settings["use_dbus"] = False
2535
2098
tcp_server.use_dbus = False
2547
2110
2548
2111
client_class = Client
2549
2112
if use_dbus:
2550
client_class = functools.partial(ClientDBus, bus = bus)
2551
2552
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
2553
2133
old_client_settings = {}
2554
clients_data = {}
2555
2556
# This is used to redirect stdout and stderr for checker processes
2557
global wnull
2558
wnull = open(os.devnull, "w") # A writable /dev/null
2559
# Only used if server is running in foreground but not in debug
2560
# mode
2561
if debug or not foreground:
2562
wnull.close()
2563
2564
# Get client data and settings from last running state.
2134
clients_data = []
2135
2136
# Get client data and settings from last running state.
2565
2137
if server_settings["restore"]:
2566
2138
try:
2567
2139
with open(stored_state_path, "rb") as stored_state:
2568
clients_data, old_client_settings = (pickle.load
2569
(stored_state))
2140
clients_data, old_client_settings = pickle.load(stored_state)
2570
2141
os.remove(stored_state_path)
2571
2142
except IOError as e:
2572
if e.errno == errno.ENOENT:
2573
logger.warning("Could not load persistent state: {0}"
2574
.format(os.strerror(e.errno)))
2575
else:
2576
logger.critical("Could not load persistent state:",
2577
exc_info=e)
2143
logger.warning("Could not load persistant state: {0}".format(e))
2144
if e.errno != errno.ENOENT:
2578
2145
raise
2579
except EOFError as e:
2580
logger.warning("Could not load persistent state: "
2581
"EOFError:", exc_info=e)
2582
2583
with PGPEngine() as pgp:
2584
for client_name, client in clients_data.iteritems():
2585
# Skip removed clients
2586
if client_name not in client_settings:
2587
continue
2588
2589
# Decide which value to use after restoring saved state.
2590
# We have three different values: Old config file,
2591
# new config file, and saved state.
2592
# New config value takes precedence if it differs from old
2593
# config value, otherwise use saved state.
2594
for name, value in client_settings[client_name].items():
2595
try:
2596
# For each value in new config, check if it
2597
# differs from the old config value (Except for
2598
# the "secret" attribute)
2599
if (name != "secret" and
2600
value != old_client_settings[client_name]
2601
[name]):
2602
client[name] = value
2603
except KeyError:
2604
pass
2605
2606
# Clients who has passed its expire date can still be
2607
# enabled if its last checker was successful. Clients
2608
# whose checker succeeded before we stored its state is
2609
# assumed to have successfully run all checkers during
2610
# downtime.
2611
if client["enabled"]:
2612
if datetime.datetime.utcnow() >= client["expires"]:
2613
if not client["last_checked_ok"]:
2614
logger.warning(
2615
"disabling client {0} - Client never "
2616
"performed a successful checker"
2617
.format(client_name))
2618
client["enabled"] = False
2619
elif client["last_checker_status"] != 0:
2620
logger.warning(
2621
"disabling client {0} - Client "
2622
"last checker failed with error code {1}"
2623
.format(client_name,
2624
client["last_checker_status"]))
2625
client["enabled"] = False
2626
else:
2627
client["expires"] = (datetime.datetime
2628
.utcnow()
2629
+ client["timeout"])
2630
logger.debug("Last checker succeeded,"
2631
" keeping {0} enabled"
2632
.format(client_name))
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():
2633
2156
try:
2634
client["secret"] = (
2635
pgp.decrypt(client["encrypted_secret"],
2636
client_settings[client_name]
2637
["secret"]))
2638
except PGPError:
2639
# If decryption fails, we use secret from new settings
2640
logger.debug("Failed to decrypt {0} old secret"
2641
.format(client_name))
2642
client["secret"] = (
2643
client_settings[client_name]["secret"])
2644
2645
# Add/remove clients based on new changes made to config
2646
for client_name in (set(old_client_settings)
2647
- set(client_settings)):
2648
del clients_data[client_name]
2649
for client_name in (set(client_settings)
2650
- set(old_client_settings)):
2651
clients_data[client_name] = client_settings[client_name]
2652
2653
# Create all client objects
2654
for client_name, client in clients_data.iteritems():
2655
tcp_server.clients[client_name] = client_class(
2656
name = client_name, settings = client,
2657
server_settings = server_settings)
2658
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
2659
2211
if not tcp_server.clients:
2660
2212
logger.warning("No clients defined")
2661
2662
if not foreground:
2663
if pidfile is not None:
2664
try:
2665
with pidfile:
2666
pid = os.getpid()
2667
pidfile.write(str(pid) + "\n".encode("utf-8"))
2668
except IOError:
2669
logger.error("Could not write to file %r with PID %d",
2670
pidfilename, pid)
2671
del pidfile
2213
2214
if not debug:
2215
try:
2216
with pidfile:
2217
pid = os.getpid()
2218
pidfile.write(str(pid) + "\n".encode("utf-8"))
2219
del pidfile
2220
except IOError:
2221
logger.error("Could not write to file %r with PID %d",
2222
pidfilename, pid)
2223
except NameError:
2224
# "pidfile" was never created
2225
pass
2672
2226
del pidfilename
2227
2228
signal.signal(signal.SIGINT, signal.SIG_IGN)
2673
2229
2674
2230
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2675
2231
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2676
2232
2677
2233
if use_dbus:
2678
@alternate_dbus_interfaces({"se.recompile.Mandos":
2679
"se.bsnet.fukt.Mandos"})
2680
class MandosDBusService(DBusObjectWithProperties):
2234
class MandosDBusService(dbus.service.Object):
2681
2235
"""A D-Bus proxy object"""
2682
2236
def __init__(self):
2683
2237
dbus.service.Object.__init__(self, bus, "/")
2684
2238
_interface = "se.recompile.Mandos"
2685
2239
2686
@dbus_interface_annotations(_interface)
2687
def _foo(self):
2688
return { "org.freedesktop.DBus.Property"
2689
".EmitsChangedSignal":
2690
"false"}
2691
2692
2240
@dbus.service.signal(_interface, signature="o")
2693
2241
def ClientAdded(self, objpath):
2694
2242
"D-Bus signal"
2736
2284
2737
2285
del _interface
2738
2286
2739
mandos_dbus_service = MandosDBusService()
2287
class MandosDBusServiceTransitional(MandosDBusService):
2288
__metaclass__ = AlternateDBusNamesMetaclass
2289
mandos_dbus_service = MandosDBusServiceTransitional()
2740
2290
2741
2291
def cleanup():
2742
2292
"Cleanup function; run on exit"
2743
2293
service.cleanup()
2744
2294
2745
2295
multiprocessing.active_children()
2746
wnull.close()
2747
2296
if not (tcp_server.clients or client_settings):
2748
2297
return
2749
2750
# Store client before exiting. Secrets are encrypted with key
2751
# based on what config file has. If config file is
2752
# removed/edited, old secret will thus be unrecovable.
2753
clients = {}
2754
with PGPEngine() as pgp:
2755
for client in tcp_server.clients.itervalues():
2756
key = client_settings[client.name]["secret"]
2757
client.encrypted_secret = pgp.encrypt(client.secret,
2758
key)
2759
client_dict = {}
2760
2761
# A list of attributes that can not be pickled
2762
# + secret.
2763
exclude = set(("bus", "changedstate", "secret",
2764
"checker", "server_settings"))
2765
for name, typ in (inspect.getmembers
2766
(dbus.service.Object)):
2767
exclude.add(name)
2768
2769
client_dict["encrypted_secret"] = (client
2770
.encrypted_secret)
2771
for attr in client.client_structure:
2772
if attr not in exclude:
2773
client_dict[attr] = getattr(client, attr)
2774
2775
clients[client.name] = client_dict
2776
del client_settings[client.name]["secret"]
2777
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
2778
2321
try:
2779
with (tempfile.NamedTemporaryFile
2780
(mode='wb', suffix=".pickle", prefix='clients-',
2781
dir=os.path.dirname(stored_state_path),
2782
delete=False)) as stored_state:
2322
with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2783
2323
pickle.dump((clients, client_settings), stored_state)
2784
tempname=stored_state.name
2785
os.rename(tempname, stored_state_path)
2786
except (IOError, OSError) as e:
2787
if not debug:
2788
try:
2789
os.remove(tempname)
2790
except NameError:
2791
pass
2792
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2793
logger.warning("Could not save persistent state: {0}"
2794
.format(os.strerror(e.errno)))
2795
else:
2796
logger.warning("Could not save persistent state:",
2797
exc_info=e)
2324
except IOError as e:
2325
logger.warning("Could not save persistant state: {0}".format(e))
2326
if e.errno != errno.ENOENT:
2798
2327
raise
2799
2328
2800
2329
# Delete all clients, and settings from config
2801
2330
while tcp_server.clients:
2802
2331
name, client = tcp_server.clients.popitem()
2820
2349
# Need to initiate checking of clients
2821
2350
if client.enabled:
2822
2351
client.init_checker()
2352
2823
2353
2824
2354
tcp_server.enable()
2825
2355
tcp_server.server_activate()
2828
2358
service.port = tcp_server.socket.getsockname()[1]
2829
2359
if use_ipv6:
2830
2360
logger.info("Now listening on address %r, port %d,"
2831
" flowinfo %d, scope_id %d",
2832
*tcp_server.socket.getsockname())
2361
" flowinfo %d, scope_id %d"
2362
% tcp_server.socket.getsockname())
2833
2363
else: # IPv4
2834
logger.info("Now listening on address %r, port %d",
2835
*tcp_server.socket.getsockname())
2364
logger.info("Now listening on address %r, port %d"
2365
% tcp_server.socket.getsockname())
2836
2366
2837
2367
#service.interface = tcp_server.socket.getsockname()[3]
2838
2368
2841
2371
try:
2842
2372
service.activate()
2843
2373
except dbus.exceptions.DBusException as error:
2844
logger.critical("D-Bus Exception", exc_info=error)
2374
logger.critical("DBusException: %s", error)
2845
2375
cleanup()
2846
2376
sys.exit(1)
2847
2377
# End of Avahi example code
2854
2384
logger.debug("Starting main loop")
2855
2385
main_loop.run()
2856
2386
except AvahiError as error:
2857
logger.critical("Avahi Error", exc_info=error)
2387
logger.critical("AvahiError: %s", error)
2858
2388
cleanup()
2859
2389
sys.exit(1)
2860
2390
except KeyboardInterrupt:
2865
2395
# Must run before the D-Bus bus name gets deregistered
2866
2396
cleanup()
2867
2397
2398
2868
2399
if __name__ == '__main__':
2869
2400
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0