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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:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2014 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 = "1.6.5"
92
stored_state_file = "clients.pickle"
87
88
version = "1.4.1"
93
89
94
90
logger = logging.getLogger()
95
syslogger = None
96
97
try:
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.if_nametoindex)
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
108
interface))
109
interface_index = struct.unpack(str("I"),
110
ifreq[16:20])[0]
111
return interface_index
112
113
114
def initlogger(debug, level=logging.WARNING):
115
"""init logger and add loglevel"""
116
117
syslogger = (logging.handlers.SysLogHandler
118
(facility =
119
logging.handlers.SysLogHandler.LOG_DAEMON,
120
address = str("/dev/log")))
121
syslogger.setFormatter(logging.Formatter
122
('Mandos [%(process)d]: %(levelname)s:'
123
' %(message)s'))
124
logger.addHandler(syslogger)
125
126
if debug:
127
console = logging.StreamHandler()
128
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
129
' [%(process)d]:'
130
' %(levelname)s:'
131
' %(message)s'))
132
logger.addHandler(console)
133
logger.setLevel(level)
134
135
136
class PGPError(Exception):
137
"""Exception if encryption/decryption fails"""
138
pass
139
140
141
class PGPEngine(object):
142
"""A simple class for OpenPGP symmetric encryption & decryption"""
143
def __init__(self):
144
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
145
self.gnupgargs = ['--batch',
146
'--home', self.tempdir,
147
'--force-mdc',
148
'--quiet',
149
'--no-use-agent']
150
151
def __enter__(self):
152
return self
153
154
def __exit__(self, exc_type, exc_value, traceback):
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
encoded = b"mandos" + binascii.hexlify(password)
178
if len(encoded) > 2048:
179
# GnuPG can't handle long passwords, so encode differently
180
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
181
.replace(b"\n", b"\\n")
182
.replace(b"\0", b"\\x00"))
183
return encoded
184
185
def encrypt(self, data, password):
186
passphrase = self.password_encode(password)
187
with tempfile.NamedTemporaryFile(dir=self.tempdir
188
) as passfile:
189
passfile.write(passphrase)
190
passfile.flush()
191
proc = subprocess.Popen(['gpg', '--symmetric',
192
'--passphrase-file',
193
passfile.name]
194
+ self.gnupgargs,
195
stdin = subprocess.PIPE,
196
stdout = subprocess.PIPE,
197
stderr = subprocess.PIPE)
198
ciphertext, err = proc.communicate(input = data)
199
if proc.returncode != 0:
200
raise PGPError(err)
201
return ciphertext
202
203
def decrypt(self, data, password):
204
passphrase = self.password_encode(password)
205
with tempfile.NamedTemporaryFile(dir = self.tempdir
206
) as passfile:
207
passfile.write(passphrase)
208
passfile.flush()
209
proc = subprocess.Popen(['gpg', '--decrypt',
210
'--passphrase-file',
211
passfile.name]
212
+ self.gnupgargs,
213
stdin = subprocess.PIPE,
214
stdout = subprocess.PIPE,
215
stderr = subprocess.PIPE)
216
decrypted_plaintext, err = proc.communicate(input
217
= data)
218
if proc.returncode != 0:
219
raise PGPError(err)
220
return decrypted_plaintext
91
stored_state_path = "/var/lib/mandos/clients.pickle"
92
93
syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
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)
221
107
222
108
223
109
class AvahiError(Exception):
242
128
Used to optionally bind to the specified interface.
243
129
name: string; Example: 'Mandos'
244
130
type: string; Example: '_mandos._tcp'.
245
See <https://www.iana.org/assignments/service-names-port-numbers>
131
See <http://www.dns-sd.org/ServiceTypes.html>
246
132
port: integer; what port to announce
247
133
TXT: list of strings; TXT record for the service
248
134
domain: string; Domain to publish on, default to .local if empty.
254
140
server: D-Bus Server
255
141
bus: dbus.SystemBus()
256
142
"""
257
258
143
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
259
144
servicetype = None, port = None, TXT = None,
260
145
domain = "", host = "", max_renames = 32768,
273
158
self.server = None
274
159
self.bus = bus
275
160
self.entry_group_state_changed_match = None
276
277
161
def rename(self):
278
162
"""Derived from the Avahi example code"""
279
163
if self.rename_count >= self.max_renames:
289
173
try:
290
174
self.add()
291
175
except dbus.exceptions.DBusException as error:
292
logger.critical("D-Bus Exception", exc_info=error)
176
logger.critical("DBusException: %s", error)
293
177
self.cleanup()
294
178
os._exit(1)
295
179
self.rename_count += 1
296
297
180
def remove(self):
298
181
"""Derived from the Avahi example code"""
299
182
if self.entry_group_state_changed_match is not None:
301
184
self.entry_group_state_changed_match = None
302
185
if self.group is not None:
303
186
self.group.Reset()
304
305
187
def add(self):
306
188
"""Derived from the Avahi example code"""
307
189
self.remove()
324
206
dbus.UInt16(self.port),
325
207
avahi.string_array_to_txt_array(self.TXT))
326
208
self.group.Commit()
327
328
209
def entry_group_state_changed(self, state, error):
329
210
"""Derived from the Avahi example code"""
330
211
logger.debug("Avahi entry group state change: %i", state)
337
218
elif state == avahi.ENTRY_GROUP_FAILURE:
338
219
logger.critical("Avahi: Error in group state changed %s",
339
220
unicode(error))
340
raise AvahiGroupError("State changed: {0!s}"
341
.format(error))
342
221
raise AvahiGroupError("State changed: %s"
222
% unicode(error))
343
223
def cleanup(self):
344
224
"""Derived from the Avahi example code"""
345
225
if self.group is not None:
346
226
try:
347
227
self.group.Free()
348
228
except (dbus.exceptions.UnknownMethodException,
349
dbus.exceptions.DBusException):
229
dbus.exceptions.DBusException) as e:
350
230
pass
351
231
self.group = None
352
232
self.remove()
353
354
233
def server_state_changed(self, state, error=None):
355
234
"""Derived from the Avahi example code"""
356
235
logger.debug("Avahi server state change: %i", state)
375
254
logger.debug("Unknown state: %r", state)
376
255
else:
377
256
logger.debug("Unknown state: %r: %r", state, error)
378
379
257
def activate(self):
380
258
"""Derived from the Avahi example code"""
381
259
if self.server is None:
388
266
self.server_state_changed)
389
267
self.server_state_changed(self.server.GetState())
390
268
391
392
269
class AvahiServiceToSyslog(AvahiService):
393
270
def rename(self):
394
271
"""Add the new name to the syslog messages"""
395
272
ret = AvahiService.rename(self)
396
273
syslogger.setFormatter(logging.Formatter
397
('Mandos ({0}) [%(process)d]:'
398
' %(levelname)s: %(message)s'
399
.format(self.name)))
274
('Mandos (%s) [%%(process)d]:'
275
' %%(levelname)s: %%(message)s'
276
% self.name))
400
277
return ret
401
278
402
403
def timedelta_to_milliseconds(td):
279
def _timedelta_to_milliseconds(td):
404
280
"Convert a datetime.timedelta() to milliseconds"
405
281
return ((td.days * 24 * 60 * 60 * 1000)
406
282
+ (td.seconds * 1000)
407
283
+ (td.microseconds // 1000))
408
409
284
410
285
class Client(object):
411
286
"""A representation of a client host served by this server.
412
287
413
288
Attributes:
414
approved: bool(); 'None' if not yet approved/disapproved
289
_approved: bool(); 'None' if not yet approved/disapproved
415
290
approval_delay: datetime.timedelta(); Time to wait for approval
416
291
approval_duration: datetime.timedelta(); Duration of one approval
417
292
checker: subprocess.Popen(); a running checker process used
435
310
interval: datetime.timedelta(); How often to start a new checker
436
311
last_approval_request: datetime.datetime(); (UTC) or None
437
312
last_checked_ok: datetime.datetime(); (UTC) or None
438
last_checker_status: integer between 0 and 255 reflecting exit
439
status of last checker. -1 reflects crashed
440
checker, -2 means no checker completed yet.
441
last_enabled: datetime.datetime(); (UTC) or None
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)
442
317
name: string; from the config file, used in log messages and
443
318
D-Bus identifiers
444
319
secret: bytestring; sent verbatim (over TLS) to client
445
320
timeout: datetime.timedelta(); How long from last_checked_ok
446
321
until this client is disabled
447
extended_timeout: extra long timeout when secret has been sent
322
extended_timeout: extra long timeout when password has been sent
448
323
runtime_expansions: Allowed attributes for runtime expansion.
449
324
expires: datetime.datetime(); time (UTC) when a client will be
450
325
disabled, or None
451
server_settings: The server_settings dict from main()
452
326
"""
453
327
454
328
runtime_expansions = ("approval_delay", "approval_duration",
455
"created", "enabled", "expires",
456
"fingerprint", "host", "interval",
457
"last_approval_request", "last_checked_ok",
329
"created", "enabled", "fingerprint",
330
"host", "interval", "last_checked_ok",
458
331
"last_enabled", "name", "timeout")
459
client_defaults = { "timeout": "PT5M",
460
"extended_timeout": "PT15M",
461
"interval": "PT2M",
462
"checker": "fping -q -- %%(host)s",
463
"host": "",
464
"approval_delay": "PT0S",
465
"approval_duration": "PT1S",
466
"approved_by_default": "True",
467
"enabled": "True",
468
}
469
332
470
333
def timeout_milliseconds(self):
471
334
"Return the 'timeout' attribute in milliseconds"
472
return timedelta_to_milliseconds(self.timeout)
335
return _timedelta_to_milliseconds(self.timeout)
473
336
474
337
def extended_timeout_milliseconds(self):
475
338
"Return the 'extended_timeout' attribute in milliseconds"
476
return timedelta_to_milliseconds(self.extended_timeout)
339
return _timedelta_to_milliseconds(self.extended_timeout)
477
340
478
341
def interval_milliseconds(self):
479
342
"Return the 'interval' attribute in milliseconds"
480
return timedelta_to_milliseconds(self.interval)
343
return _timedelta_to_milliseconds(self.interval)
481
344
482
345
def approval_delay_milliseconds(self):
483
return timedelta_to_milliseconds(self.approval_delay)
484
485
@staticmethod
486
def config_parser(config):
487
"""Construct a new dict of client settings of this form:
488
{ client_name: {setting_name: value, ...}, ...}
489
with exceptions for any special settings as defined above.
490
NOTE: Must be a pure function. Must return the same result
491
value given the same arguments.
492
"""
493
settings = {}
494
for client_name in config.sections():
495
section = dict(config.items(client_name))
496
client = settings[client_name] = {}
497
498
client["host"] = section["host"]
499
# Reformat values from string types to Python types
500
client["approved_by_default"] = config.getboolean(
501
client_name, "approved_by_default")
502
client["enabled"] = config.getboolean(client_name,
503
"enabled")
504
505
client["fingerprint"] = (section["fingerprint"].upper()
506
.replace(" ", ""))
507
if "secret" in section:
508
client["secret"] = section["secret"].decode("base64")
509
elif "secfile" in section:
510
with open(os.path.expanduser(os.path.expandvars
511
(section["secfile"])),
512
"rb") as secfile:
513
client["secret"] = secfile.read()
514
else:
515
raise TypeError("No secret or secfile for section {0}"
516
.format(section))
517
client["timeout"] = string_to_delta(section["timeout"])
518
client["extended_timeout"] = string_to_delta(
519
section["extended_timeout"])
520
client["interval"] = string_to_delta(section["interval"])
521
client["approval_delay"] = string_to_delta(
522
section["approval_delay"])
523
client["approval_duration"] = string_to_delta(
524
section["approval_duration"])
525
client["checker_command"] = section["checker"]
526
client["last_approval_request"] = None
527
client["last_checked_ok"] = None
528
client["last_checker_status"] = -2
529
530
return settings
531
532
def __init__(self, settings, name = None, server_settings=None):
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."""
533
352
self.name = name
534
if server_settings is None:
535
server_settings = {}
536
self.server_settings = server_settings
537
# adding all client settings
538
for setting, value in settings.iteritems():
539
setattr(self, setting, value)
540
541
if self.enabled:
542
if not hasattr(self, "last_enabled"):
543
self.last_enabled = datetime.datetime.utcnow()
544
if not hasattr(self, "expires"):
545
self.expires = (datetime.datetime.utcnow()
546
+ self.timeout)
547
else:
548
self.last_enabled = None
549
self.expires = None
550
353
if config is None:
354
config = {}
551
355
logger.debug("Creating client %r", self.name)
552
356
# Uppercase and remove spaces from fingerprint for later
553
357
# comparison purposes with return value from the fingerprint()
554
358
# function
359
self.fingerprint = (config["fingerprint"].upper()
360
.replace(" ", ""))
555
361
logger.debug(" Fingerprint: %s", self.fingerprint)
556
self.created = settings.get("created",
557
datetime.datetime.utcnow())
558
559
# 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"])
560
383
self.checker = None
561
384
self.checker_initiator_tag = None
562
385
self.disable_initiator_tag = None
386
self.expires = datetime.datetime.utcnow() + self.timeout
563
387
self.checker_callback_tag = None
388
self.checker_command = config["checker"]
564
389
self.current_checker_command = None
565
self.approved = None
390
self._approved = None
391
self.approved_by_default = config.get("approved_by_default",
392
True)
566
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"])
567
398
self.changedstate = (multiprocessing_manager
568
399
.Condition(multiprocessing_manager
569
400
.Lock()))
570
self.client_structure = [attr for attr in
571
self.__dict__.iterkeys()
572
if not attr.startswith("_")]
401
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
573
402
self.client_structure.append("client_structure")
574
403
404
575
405
for name, t in inspect.getmembers(type(self),
576
lambda obj:
577
isinstance(obj,
578
property)):
406
lambda obj: isinstance(obj, property)):
579
407
if not name.startswith("_"):
580
408
self.client_structure.append(name)
581
409
589
417
if getattr(self, "enabled", False):
590
418
# Already enabled
591
419
return
420
self.send_changedstate()
592
421
self.expires = datetime.datetime.utcnow() + self.timeout
593
422
self.enabled = True
594
423
self.last_enabled = datetime.datetime.utcnow()
595
424
self.init_checker()
596
self.send_changedstate()
597
425
598
426
def disable(self, quiet=True):
599
427
"""Disable this client."""
600
428
if not getattr(self, "enabled", False):
601
429
return False
602
430
if not quiet:
431
self.send_changedstate()
432
if not quiet:
603
433
logger.info("Disabling client %s", self.name)
604
if getattr(self, "disable_initiator_tag", None) is not None:
434
if getattr(self, "disable_initiator_tag", False):
605
435
gobject.source_remove(self.disable_initiator_tag)
606
436
self.disable_initiator_tag = None
607
437
self.expires = None
608
if getattr(self, "checker_initiator_tag", None) is not None:
438
if getattr(self, "checker_initiator_tag", False):
609
439
gobject.source_remove(self.checker_initiator_tag)
610
440
self.checker_initiator_tag = None
611
441
self.stop_checker()
612
442
self.enabled = False
613
if not quiet:
614
self.send_changedstate()
615
443
# Do not run this again if called by a gobject.timeout_add
616
444
return False
617
445
618
446
def __del__(self):
619
447
self.disable()
620
448
621
449
def init_checker(self):
622
450
# Schedule a new checker to be started an 'interval' from now,
623
451
# and every interval from then on.
624
if self.checker_initiator_tag is not None:
625
gobject.source_remove(self.checker_initiator_tag)
626
452
self.checker_initiator_tag = (gobject.timeout_add
627
453
(self.interval_milliseconds(),
628
454
self.start_checker))
629
455
# Schedule a disable() when 'timeout' has passed
630
if self.disable_initiator_tag is not None:
631
gobject.source_remove(self.disable_initiator_tag)
632
456
self.disable_initiator_tag = (gobject.timeout_add
633
457
(self.timeout_milliseconds(),
634
458
self.disable))
635
459
# Also start a new checker *right now*.
636
460
self.start_checker()
637
461
462
638
463
def checker_callback(self, pid, condition, command):
639
464
"""The checker has completed, so take appropriate actions."""
640
465
self.checker_callback_tag = None
641
466
self.checker = None
642
467
if os.WIFEXITED(condition):
643
self.last_checker_status = os.WEXITSTATUS(condition)
468
self.last_checker_status = os.WEXITSTATUS(condition)
644
469
if self.last_checker_status == 0:
645
470
logger.info("Checker for %(name)s succeeded",
646
471
vars(self))
653
478
logger.warning("Checker for %(name)s crashed?",
654
479
vars(self))
655
480
656
def checked_ok(self):
657
"""Assert that the client has been seen, alive and well."""
658
self.last_checked_ok = datetime.datetime.utcnow()
659
self.last_checker_status = 0
660
self.bump_timeout()
661
662
def bump_timeout(self, timeout=None):
663
"""Bump up the timeout for this client."""
481
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
"""
664
487
if timeout is None:
665
488
timeout = self.timeout
489
self.last_checked_ok = datetime.datetime.utcnow()
666
490
if self.disable_initiator_tag is not None:
667
491
gobject.source_remove(self.disable_initiator_tag)
668
self.disable_initiator_tag = None
669
492
if getattr(self, "enabled", False):
670
493
self.disable_initiator_tag = (gobject.timeout_add
671
(timedelta_to_milliseconds
494
(_timedelta_to_milliseconds
672
495
(timeout), self.disable))
673
496
self.expires = datetime.datetime.utcnow() + timeout
674
497
681
504
If a checker already exists, leave it running and do
682
505
nothing."""
683
506
# The reason for not killing a running checker is that if we
684
# did that, and if a checker (for some reason) started running
685
# slowly and taking more than 'interval' time, then the client
686
# would inevitably timeout, since no checker would get a
687
# chance to run to completion. If we instead leave running
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
688
511
# checkers alone, the checker would have to take more time
689
512
# than 'timeout' for the client to be disabled, which is as it
690
513
# should be.
692
515
# If a checker exists, make sure it is not a zombie
693
516
try:
694
517
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
695
except AttributeError:
696
pass
697
except OSError as error:
698
if error.errno != errno.ECHILD:
699
raise
518
except (AttributeError, OSError) as error:
519
if (isinstance(error, OSError)
520
and error.errno != errno.ECHILD):
521
raise error
700
522
else:
701
523
if pid:
702
524
logger.warning("Checker was a zombie")
705
527
self.current_checker_command)
706
528
# Start a new checker if needed
707
529
if self.checker is None:
708
# Escape attributes for the shell
709
escaped_attrs = dict(
710
(attr, re.escape(unicode(getattr(self, attr))))
711
for attr in
712
self.runtime_expansions)
713
530
try:
714
command = self.checker_command % escaped_attrs
715
except TypeError as error:
716
logger.error('Could not format string "%s"',
717
self.checker_command, exc_info=error)
718
return True # Try again later
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
719
549
self.current_checker_command = command
720
550
try:
721
551
logger.info("Starting checker %r for %s",
724
554
# in normal mode, that is already done by daemon(),
725
555
# and in debug mode we don't want to. (Stdin is
726
556
# always replaced by /dev/null.)
727
# The exception is when not debugging but nevertheless
728
# running in the foreground; use the previously
729
# created wnull.
730
popen_args = {}
731
if (not self.server_settings["debug"]
732
and self.server_settings["foreground"]):
733
popen_args.update({"stdout": wnull,
734
"stderr": wnull })
735
557
self.checker = subprocess.Popen(command,
736
558
close_fds=True,
737
shell=True, cwd="/",
738
**popen_args)
739
except OSError as error:
740
logger.error("Failed to start subprocess",
741
exc_info=error)
742
return True
743
self.checker_callback_tag = (gobject.child_watch_add
744
(self.checker.pid,
745
self.checker_callback,
746
data=command))
747
# The checker may have completed before the gobject
748
# watch was added. Check for this.
749
try:
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.
750
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)
751
570
except OSError as error:
752
if error.errno == errno.ECHILD:
753
# This should never happen
754
logger.error("Child process vanished",
755
exc_info=error)
756
return True
757
raise
758
if pid:
759
gobject.source_remove(self.checker_callback_tag)
760
self.checker_callback(pid, status, command)
571
logger.error("Failed to start subprocess: %s",
572
error)
761
573
# Re-run this periodically if run by gobject.timeout_add
762
574
return True
763
575
770
582
return
771
583
logger.debug("Stopping checker for %(name)s", vars(self))
772
584
try:
773
self.checker.terminate()
585
os.kill(self.checker.pid, signal.SIGTERM)
774
586
#time.sleep(0.5)
775
587
#if self.checker.poll() is None:
776
# self.checker.kill()
588
# os.kill(self.checker.pid, signal.SIGKILL)
777
589
except OSError as error:
778
590
if error.errno != errno.ESRCH: # No such process
779
591
raise
780
592
self.checker = None
781
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
782
640
783
641
def dbus_service_property(dbus_interface, signature="v",
784
642
access="readwrite", byte_arrays=False):
796
654
# "Set" method, so we fail early here:
797
655
if byte_arrays and signature != "ay":
798
656
raise ValueError("Byte arrays not supported for non-'ay'"
799
" signature {0!r}".format(signature))
657
" signature %r" % signature)
800
658
def decorator(func):
801
659
func._dbus_is_property = True
802
660
func._dbus_interface = dbus_interface
810
668
return decorator
811
669
812
670
813
def dbus_interface_annotations(dbus_interface):
814
"""Decorator for marking functions returning interface annotations
815
816
Usage:
817
818
@dbus_interface_annotations("org.example.Interface")
819
def _foo(self): # Function name does not matter
820
return {"org.freedesktop.DBus.Deprecated": "true",
821
"org.freedesktop.DBus.Property.EmitsChangedSignal":
822
"false"}
823
"""
824
def decorator(func):
825
func._dbus_is_interface = True
826
func._dbus_interface = dbus_interface
827
func._dbus_name = dbus_interface
828
return func
829
return decorator
830
831
832
def dbus_annotations(annotations):
833
"""Decorator to annotate D-Bus methods, signals or properties
834
Usage:
835
836
@dbus_service_property("org.example.Interface", signature="b",
837
access="r")
838
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
839
"org.freedesktop.DBus.Property."
840
"EmitsChangedSignal": "false"})
841
def Property_dbus_property(self):
842
return dbus.Boolean(False)
843
"""
844
def decorator(func):
845
func._dbus_annotations = annotations
846
return func
847
return decorator
848
849
850
671
class DBusPropertyException(dbus.exceptions.DBusException):
851
672
"""A base class for D-Bus property-related exceptions
852
673
"""
875
696
"""
876
697
877
698
@staticmethod
878
def _is_dbus_thing(thing):
879
"""Returns a function testing if an attribute is a D-Bus thing
880
881
If called like _is_dbus_thing("method") it returns a function
882
suitable for use as predicate to inspect.getmembers().
883
"""
884
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
885
False)
699
def _is_dbus_property(obj):
700
return getattr(obj, "_dbus_is_property", False)
886
701
887
def _get_all_dbus_things(self, thing):
702
def _get_all_dbus_properties(self):
888
703
"""Returns a generator of (name, attribute) pairs
889
704
"""
890
return ((getattr(athing.__get__(self), "_dbus_name",
891
name),
892
athing.__get__(self))
705
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
893
706
for cls in self.__class__.__mro__
894
for name, athing in
895
inspect.getmembers(cls,
896
self._is_dbus_thing(thing)))
707
for name, prop in
708
inspect.getmembers(cls, self._is_dbus_property))
897
709
898
710
def _get_dbus_property(self, interface_name, property_name):
899
711
"""Returns a bound method if one exists which is a D-Bus
901
713
"""
902
714
for cls in self.__class__.__mro__:
903
715
for name, value in (inspect.getmembers
904
(cls,
905
self._is_dbus_thing("property"))):
716
(cls, self._is_dbus_property)):
906
717
if (value._dbus_name == property_name
907
718
and value._dbus_interface == interface_name):
908
719
return value.__get__(self)
936
747
# The byte_arrays option is not supported yet on
937
748
# signatures other than "ay".
938
749
if prop._dbus_signature != "ay":
939
raise ValueError("Byte arrays not supported for non-"
940
"'ay' signature {0!r}"
941
.format(prop._dbus_signature))
942
value = dbus.ByteArray(b''.join(chr(byte)
943
for byte in value))
750
raise ValueError
751
value = dbus.ByteArray(''.join(unichr(byte)
752
for byte in value))
944
753
prop(value)
945
754
946
755
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
951
760
952
761
Note: Will not include properties with access="write".
953
762
"""
954
properties = {}
955
for name, prop in self._get_all_dbus_things("property"):
763
all = {}
764
for name, prop in self._get_all_dbus_properties():
956
765
if (interface_name
957
766
and interface_name != prop._dbus_interface):
958
767
# Interface non-empty but did not match
962
771
continue
963
772
value = prop()
964
773
if not hasattr(value, "variant_level"):
965
properties[name] = value
774
all[name] = value
966
775
continue
967
properties[name] = type(value)(value, variant_level=
968
value.variant_level+1)
969
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")
970
779
971
780
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
972
781
out_signature="s",
973
782
path_keyword='object_path',
974
783
connection_keyword='connection')
975
784
def Introspect(self, object_path, connection):
976
"""Overloading of standard D-Bus method.
977
978
Inserts property tags and interface annotation tags.
785
"""Standard D-Bus method, overloaded to insert property tags.
979
786
"""
980
787
xmlstring = dbus.service.Object.Introspect(self, object_path,
981
788
connection)
988
795
e.setAttribute("access", prop._dbus_access)
989
796
return e
990
797
for if_tag in document.getElementsByTagName("interface"):
991
# Add property tags
992
798
for tag in (make_tag(document, name, prop)
993
799
for name, prop
994
in self._get_all_dbus_things("property")
800
in self._get_all_dbus_properties()
995
801
if prop._dbus_interface
996
802
== if_tag.getAttribute("name")):
997
803
if_tag.appendChild(tag)
998
# Add annotation tags
999
for typ in ("method", "signal", "property"):
1000
for tag in if_tag.getElementsByTagName(typ):
1001
annots = dict()
1002
for name, prop in (self.
1003
_get_all_dbus_things(typ)):
1004
if (name == tag.getAttribute("name")
1005
and prop._dbus_interface
1006
== if_tag.getAttribute("name")):
1007
annots.update(getattr
1008
(prop,
1009
"_dbus_annotations",
1010
{}))
1011
for name, value in annots.iteritems():
1012
ann_tag = document.createElement(
1013
"annotation")
1014
ann_tag.setAttribute("name", name)
1015
ann_tag.setAttribute("value", value)
1016
tag.appendChild(ann_tag)
1017
# Add interface annotation tags
1018
for annotation, value in dict(
1019
itertools.chain.from_iterable(
1020
annotations().iteritems()
1021
for name, annotations in
1022
self._get_all_dbus_things("interface")
1023
if name == if_tag.getAttribute("name")
1024
)).iteritems():
1025
ann_tag = document.createElement("annotation")
1026
ann_tag.setAttribute("name", annotation)
1027
ann_tag.setAttribute("value", value)
1028
if_tag.appendChild(ann_tag)
1029
804
# Add the names to the return values for the
1030
805
# "org.freedesktop.DBus.Properties" methods
1031
806
if (if_tag.getAttribute("name")
1046
821
except (AttributeError, xml.dom.DOMException,
1047
822
xml.parsers.expat.ExpatError) as error:
1048
823
logger.error("Failed to override Introspection method",
1049
exc_info=error)
824
error)
1050
825
return xmlstring
1051
826
1052
827
1053
def datetime_to_dbus(dt, variant_level=0):
828
def datetime_to_dbus (dt, variant_level=0):
1054
829
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1055
830
if dt is None:
1056
831
return dbus.String("", variant_level = variant_level)
1057
832
return dbus.String(dt.isoformat(),
1058
833
variant_level=variant_level)
1059
834
1060
1061
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1062
"""A class decorator; applied to a subclass of
1063
dbus.service.Object, it will add alternate D-Bus attributes with
1064
interface names according to the "alt_interface_names" mapping.
1065
Usage:
1066
1067
@alternate_dbus_interfaces({"org.example.Interface":
1068
"net.example.AlternateInterface"})
1069
class SampleDBusObject(dbus.service.Object):
1070
@dbus.service.method("org.example.Interface")
1071
def SampleDBusMethod():
1072
pass
1073
1074
The above "SampleDBusMethod" on "SampleDBusObject" will be
1075
reachable via two interfaces: "org.example.Interface" and
1076
"net.example.AlternateInterface", the latter of which will have
1077
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1078
"true", unless "deprecate" is passed with a False value.
1079
1080
This works for methods and signals, and also for D-Bus properties
1081
(from DBusObjectWithProperties) and interfaces (from the
1082
dbus_interface_annotations decorator).
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.
1083
839
"""
1084
def wrapper(cls):
1085
for orig_interface_name, alt_interface_name in (
1086
alt_interface_names.iteritems()):
1087
attr = {}
1088
interface_names = set()
1089
# Go though all attributes of the class
1090
for attrname, attribute in inspect.getmembers(cls):
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):
1091
847
# Ignore non-D-Bus attributes, and D-Bus attributes
1092
848
# with the wrong interface name
1093
849
if (not hasattr(attribute, "_dbus_interface")
1094
850
or not attribute._dbus_interface
1095
.startswith(orig_interface_name)):
851
.startswith("se.recompile.Mandos")):
1096
852
continue
1097
853
# Create an alternate D-Bus interface name based on
1098
854
# the current name
1099
855
alt_interface = (attribute._dbus_interface
1100
.replace(orig_interface_name,
1101
alt_interface_name))
1102
interface_names.add(alt_interface)
856
.replace("se.recompile.Mandos",
857
"se.bsnet.fukt.Mandos"))
1103
858
# Is this a D-Bus signal?
1104
859
if getattr(attribute, "_dbus_is_signal", False):
1105
# Extract the original non-method undecorated
1106
# function by black magic
860
# Extract the original non-method function by
861
# black magic
1107
862
nonmethod_func = (dict(
1108
863
zip(attribute.func_code.co_freevars,
1109
864
attribute.__closure__))["func"]
1120
875
nonmethod_func.func_name,
1121
876
nonmethod_func.func_defaults,
1122
877
nonmethod_func.func_closure)))
1123
# Copy annotations, if any
1124
try:
1125
new_function._dbus_annotations = (
1126
dict(attribute._dbus_annotations))
1127
except AttributeError:
1128
pass
1129
878
# Define a creator of a function to call both the
1130
# original and alternate functions, so both the
1131
# original and alternate signals gets sent when
1132
# the function is called
879
# old and new functions, so both the old and new
880
# signals gets sent when the function is called
1133
881
def fixscope(func1, func2):
1134
882
"""This function is a scope container to pass
1135
883
func1 and func2 to the "call_both" function
1142
890
return call_both
1143
891
# Create the "call_both" function and add it to
1144
892
# the class
1145
attr[attrname] = fixscope(attribute, new_function)
893
attr[attrname] = fixscope(attribute,
894
new_function)
1146
895
# Is this a D-Bus method?
1147
896
elif getattr(attribute, "_dbus_is_method", False):
1148
897
# Create a new, but exactly alike, function
1159
908
attribute.func_name,
1160
909
attribute.func_defaults,
1161
910
attribute.func_closure)))
1162
# Copy annotations, if any
1163
try:
1164
attr[attrname]._dbus_annotations = (
1165
dict(attribute._dbus_annotations))
1166
except AttributeError:
1167
pass
1168
911
# Is this a D-Bus property?
1169
912
elif getattr(attribute, "_dbus_is_property", False):
1170
913
# Create a new, but exactly alike, function
1184
927
attribute.func_name,
1185
928
attribute.func_defaults,
1186
929
attribute.func_closure)))
1187
# Copy annotations, if any
1188
try:
1189
attr[attrname]._dbus_annotations = (
1190
dict(attribute._dbus_annotations))
1191
except AttributeError:
1192
pass
1193
# Is this a D-Bus interface?
1194
elif getattr(attribute, "_dbus_is_interface", False):
1195
# Create a new, but exactly alike, function
1196
# object. Decorate it to be a new D-Bus interface
1197
# with the alternate D-Bus interface name. Add it
1198
# to the class.
1199
attr[attrname] = (dbus_interface_annotations
1200
(alt_interface)
1201
(types.FunctionType
1202
(attribute.func_code,
1203
attribute.func_globals,
1204
attribute.func_name,
1205
attribute.func_defaults,
1206
attribute.func_closure)))
1207
if deprecate:
1208
# Deprecate all alternate interfaces
1209
iname="_AlternateDBusNames_interface_annotation{0}"
1210
for interface_name in interface_names:
1211
@dbus_interface_annotations(interface_name)
1212
def func(self):
1213
return { "org.freedesktop.DBus.Deprecated":
1214
"true" }
1215
# Find an unused name
1216
for aname in (iname.format(i)
1217
for i in itertools.count()):
1218
if aname not in attr:
1219
attr[aname] = func
1220
break
1221
if interface_names:
1222
# Replace the class with a new subclass of it with
1223
# methods, signals, etc. as created above.
1224
cls = type(b"{0}Alternate".format(cls.__name__),
1225
(cls,), attr)
1226
return cls
1227
return wrapper
1228
1229
1230
@alternate_dbus_interfaces({"se.recompile.Mandos":
1231
"se.bsnet.fukt.Mandos"})
930
return type.__new__(mcs, name, bases, attr)
931
1232
932
class ClientDBus(Client, DBusObjectWithProperties):
1233
933
"""A Client class using D-Bus
1234
934
1245
945
def __init__(self, bus = None, *args, **kwargs):
1246
946
self.bus = bus
1247
947
Client.__init__(self, *args, **kwargs)
948
949
self._approvals_pending = 0
1248
950
# Only now, when this client is initialized, can it show up on
1249
951
# the D-Bus
1250
952
client_object_name = unicode(self.name).translate(
1254
956
("/clients/" + client_object_name))
1255
957
DBusObjectWithProperties.__init__(self, self.bus,
1256
958
self.dbus_object_path)
1257
959
1258
960
def notifychangeproperty(transform_func,
1259
961
dbus_name, type_func=lambda x: x,
1260
962
variant_level=1):
1261
963
""" Modify a variable so that it's a property which announces
1262
964
its changes to DBus.
1263
965
1264
966
transform_fun: Function that takes a value and a variant_level
1265
967
and transforms it to a D-Bus type.
1266
968
dbus_name: D-Bus name of the variable
1283
985
1284
986
return property(lambda self: getattr(self, attrname), setter)
1285
987
988
1286
989
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1287
990
approvals_pending = notifychangeproperty(dbus.Boolean,
1288
991
"ApprovalPending",
1295
998
checker is not None)
1296
999
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1297
1000
"LastCheckedOK")
1298
last_checker_status = notifychangeproperty(dbus.Int16,
1299
"LastCheckerStatus")
1300
1001
last_approval_request = notifychangeproperty(
1301
1002
datetime_to_dbus, "LastApprovalRequest")
1302
1003
approved_by_default = notifychangeproperty(dbus.Boolean,
1303
1004
"ApprovedByDefault")
1304
approval_delay = notifychangeproperty(dbus.UInt64,
1005
approval_delay = notifychangeproperty(dbus.UInt16,
1305
1006
"ApprovalDelay",
1306
1007
type_func =
1307
timedelta_to_milliseconds)
1008
_timedelta_to_milliseconds)
1308
1009
approval_duration = notifychangeproperty(
1309
dbus.UInt64, "ApprovalDuration",
1310
type_func = timedelta_to_milliseconds)
1010
dbus.UInt16, "ApprovalDuration",
1011
type_func = _timedelta_to_milliseconds)
1311
1012
host = notifychangeproperty(dbus.String, "Host")
1312
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1013
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1313
1014
type_func =
1314
timedelta_to_milliseconds)
1015
_timedelta_to_milliseconds)
1315
1016
extended_timeout = notifychangeproperty(
1316
dbus.UInt64, "ExtendedTimeout",
1317
type_func = timedelta_to_milliseconds)
1318
interval = notifychangeproperty(dbus.UInt64,
1017
dbus.UInt16, "ExtendedTimeout",
1018
type_func = _timedelta_to_milliseconds)
1019
interval = notifychangeproperty(dbus.UInt16,
1319
1020
"Interval",
1320
1021
type_func =
1321
timedelta_to_milliseconds)
1022
_timedelta_to_milliseconds)
1322
1023
checker_command = notifychangeproperty(dbus.String, "Checker")
1323
1024
1324
1025
del notifychangeproperty
1352
1053
*args, **kwargs)
1353
1054
1354
1055
def start_checker(self, *args, **kwargs):
1355
old_checker_pid = getattr(self.checker, "pid", None)
1056
old_checker = self.checker
1057
if self.checker is not None:
1058
old_checker_pid = self.checker.pid
1059
else:
1060
old_checker_pid = None
1356
1061
r = Client.start_checker(self, *args, **kwargs)
1357
1062
# Only if new checker process was started
1358
1063
if (self.checker is not None
1362
1067
return r
1363
1068
1364
1069
def _reset_approved(self):
1365
self.approved = None
1070
self._approved = None
1366
1071
return False
1367
1072
1368
1073
def approve(self, value=True):
1369
self.approved = value
1370
gobject.timeout_add(timedelta_to_milliseconds
1074
self.send_changedstate()
1075
self._approved = value
1076
gobject.timeout_add(_timedelta_to_milliseconds
1371
1077
(self.approval_duration),
1372
1078
self._reset_approved)
1373
self.send_changedstate()
1079
1374
1080
1375
1081
## D-Bus methods, signals & properties
1376
1082
_interface = "se.recompile.Mandos.Client"
1377
1083
1378
## Interfaces
1379
1380
@dbus_interface_annotations(_interface)
1381
def _foo(self):
1382
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1383
"false"}
1384
1385
1084
## Signals
1386
1085
1387
1086
# CheckerCompleted - signal
1486
1185
access="readwrite")
1487
1186
def ApprovalDuration_dbus_property(self, value=None):
1488
1187
if value is None: # get
1489
return dbus.UInt64(timedelta_to_milliseconds(
1188
return dbus.UInt64(_timedelta_to_milliseconds(
1490
1189
self.approval_duration))
1491
1190
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1492
1191
1506
1205
def Host_dbus_property(self, value=None):
1507
1206
if value is None: # get
1508
1207
return dbus.String(self.host)
1509
self.host = unicode(value)
1208
self.host = value
1510
1209
1511
1210
# Created - property
1512
1211
@dbus_service_property(_interface, signature="s", access="read")
1513
1212
def Created_dbus_property(self):
1514
return datetime_to_dbus(self.created)
1213
return dbus.String(datetime_to_dbus(self.created))
1515
1214
1516
1215
# LastEnabled - property
1517
1216
@dbus_service_property(_interface, signature="s", access="read")
1538
1237
return
1539
1238
return datetime_to_dbus(self.last_checked_ok)
1540
1239
1541
# LastCheckerStatus - property
1542
@dbus_service_property(_interface, signature="n",
1543
access="read")
1544
def LastCheckerStatus_dbus_property(self):
1545
return dbus.Int16(self.last_checker_status)
1546
1547
1240
# Expires - property
1548
1241
@dbus_service_property(_interface, signature="s", access="read")
1549
1242
def Expires_dbus_property(self):
1560
1253
def Timeout_dbus_property(self, value=None):
1561
1254
if value is None: # get
1562
1255
return dbus.UInt64(self.timeout_milliseconds())
1563
old_timeout = self.timeout
1564
1256
self.timeout = datetime.timedelta(0, 0, 0, value)
1565
# Reschedule disabling
1566
if self.enabled:
1567
now = datetime.datetime.utcnow()
1568
self.expires += self.timeout - old_timeout
1569
if self.expires <= now:
1570
# The timeout has passed
1571
self.disable()
1572
else:
1573
if (getattr(self, "disable_initiator_tag", None)
1574
is None):
1575
return
1576
gobject.source_remove(self.disable_initiator_tag)
1577
self.disable_initiator_tag = (
1578
gobject.timeout_add(
1579
timedelta_to_milliseconds(self.expires - now),
1580
self.disable))
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))
1581
1277
1582
1278
# ExtendedTimeout - property
1583
1279
@dbus_service_property(_interface, signature="t",
1596
1292
self.interval = datetime.timedelta(0, 0, 0, value)
1597
1293
if getattr(self, "checker_initiator_tag", None) is None:
1598
1294
return
1599
if self.enabled:
1600
# Reschedule checker run
1601
gobject.source_remove(self.checker_initiator_tag)
1602
self.checker_initiator_tag = (gobject.timeout_add
1603
(value, self.start_checker))
1604
self.start_checker() # Start one now, too
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
1605
1300
1606
1301
# Checker - property
1607
1302
@dbus_service_property(_interface, signature="s",
1609
1304
def Checker_dbus_property(self, value=None):
1610
1305
if value is None: # get
1611
1306
return dbus.String(self.checker_command)
1612
self.checker_command = unicode(value)
1307
self.checker_command = value
1613
1308
1614
1309
# CheckerRunning - property
1615
1310
@dbus_service_property(_interface, signature="b",
1644
1339
raise KeyError()
1645
1340
1646
1341
def __getattribute__(self, name):
1647
if name == '_pipe':
1342
if(name == '_pipe'):
1648
1343
return super(ProxyClient, self).__getattribute__(name)
1649
1344
self._pipe.send(('getattr', name))
1650
1345
data = self._pipe.recv()
1657
1352
return func
1658
1353
1659
1354
def __setattr__(self, name, value):
1660
if name == '_pipe':
1355
if(name == '_pipe'):
1661
1356
return super(ProxyClient, self).__setattr__(name, value)
1662
1357
self._pipe.send(('setattr', name, value))
1663
1358
1359
class ClientDBusTransitional(ClientDBus):
1360
__metaclass__ = AlternateDBusNamesMetaclass
1664
1361
1665
1362
class ClientHandler(socketserver.BaseRequestHandler, object):
1666
1363
"""A class to handle client connections.
1703
1400
logger.debug("Protocol version: %r", line)
1704
1401
try:
1705
1402
if int(line.strip().split()[0]) > 1:
1706
raise RuntimeError(line)
1403
raise RuntimeError
1707
1404
except (ValueError, IndexError, RuntimeError) as error:
1708
1405
logger.error("Unknown protocol version: %s", error)
1709
1406
return
1749
1446
client.Rejected("Disabled")
1750
1447
return
1751
1448
1752
if client.approved or not client.approval_delay:
1449
if client._approved or not client.approval_delay:
1753
1450
#We are approved or approval is disabled
1754
1451
break
1755
elif client.approved is None:
1452
elif client._approved is None:
1756
1453
logger.info("Client %s needs approval",
1757
1454
client.name)
1758
1455
if self.server.use_dbus:
1771
1468
#wait until timeout or approved
1772
1469
time = datetime.datetime.now()
1773
1470
client.changedstate.acquire()
1774
client.changedstate.wait(
1775
float(timedelta_to_milliseconds(delay)
1776
/ 1000))
1471
(client.changedstate.wait
1472
(float(client._timedelta_to_milliseconds(delay)
1473
/ 1000)))
1777
1474
client.changedstate.release()
1778
1475
time2 = datetime.datetime.now()
1779
1476
if (time2 - time) >= delay:
1795
1492
try:
1796
1493
sent = session.send(client.secret[sent_size:])
1797
1494
except gnutls.errors.GNUTLSError as error:
1798
logger.warning("gnutls send failed",
1799
exc_info=error)
1495
logger.warning("gnutls send failed")
1800
1496
return
1801
1497
logger.debug("Sent: %d, remaining: %d",
1802
1498
sent, len(client.secret)
1805
1501
1806
1502
logger.info("Sending secret to %s", client.name)
1807
1503
# bump the timeout using extended_timeout
1808
client.bump_timeout(client.extended_timeout)
1504
client.checked_ok(client.extended_timeout)
1809
1505
if self.server.use_dbus:
1810
1506
# Emit D-Bus signal
1811
1507
client.GotSecret()
1816
1512
try:
1817
1513
session.bye()
1818
1514
except gnutls.errors.GNUTLSError as error:
1819
logger.warning("GnuTLS bye failed",
1820
exc_info=error)
1515
logger.warning("GnuTLS bye failed")
1821
1516
1822
1517
@staticmethod
1823
1518
def peer_certificate(session):
1879
1574
# Convert the buffer to a Python bytestring
1880
1575
fpr = ctypes.string_at(buf, buf_len.value)
1881
1576
# Convert the bytestring to hexadecimal notation
1882
hex_fpr = binascii.hexlify(fpr).upper()
1577
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1883
1578
return hex_fpr
1884
1579
1885
1580
1888
1583
def sub_process_main(self, request, address):
1889
1584
try:
1890
1585
self.finish_request(request, address)
1891
except Exception:
1586
except:
1892
1587
self.handle_error(request, address)
1893
1588
self.close_request(request)
1894
1589
1895
1590
def process_request(self, request, address):
1896
1591
"""Start a new process to process the request."""
1897
1592
proc = multiprocessing.Process(target = self.sub_process_main,
1898
args = (request, address))
1593
args = (request,
1594
address))
1899
1595
proc.start()
1900
1596
return proc
1901
1597
1916
1612
1917
1613
def add_pipe(self, parent_pipe, proc):
1918
1614
"""Dummy function; override as necessary"""
1919
raise NotImplementedError()
1615
raise NotImplementedError
1920
1616
1921
1617
1922
1618
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1929
1625
use_ipv6: Boolean; to use IPv6 or not
1930
1626
"""
1931
1627
def __init__(self, server_address, RequestHandlerClass,
1932
interface=None, use_ipv6=True, socketfd=None):
1933
"""If socketfd is set, use that file descriptor instead of
1934
creating a new one with socket.socket().
1935
"""
1628
interface=None, use_ipv6=True):
1936
1629
self.interface = interface
1937
1630
if use_ipv6:
1938
1631
self.address_family = socket.AF_INET6
1939
if socketfd is not None:
1940
# Save the file descriptor
1941
self.socketfd = socketfd
1942
# Save the original socket.socket() function
1943
self.socket_socket = socket.socket
1944
# To implement --socket, we monkey patch socket.socket.
1945
#
1946
# (When socketserver.TCPServer is a new-style class, we
1947
# could make self.socket into a property instead of monkey
1948
# patching socket.socket.)
1949
#
1950
# Create a one-time-only replacement for socket.socket()
1951
@functools.wraps(socket.socket)
1952
def socket_wrapper(*args, **kwargs):
1953
# Restore original function so subsequent calls are
1954
# not affected.
1955
socket.socket = self.socket_socket
1956
del self.socket_socket
1957
# This time only, return a new socket object from the
1958
# saved file descriptor.
1959
return socket.fromfd(self.socketfd, *args, **kwargs)
1960
# Replace socket.socket() function with wrapper
1961
socket.socket = socket_wrapper
1962
# The socketserver.TCPServer.__init__ will call
1963
# socket.socket(), which might be our replacement,
1964
# socket_wrapper(), if socketfd was set.
1965
1632
socketserver.TCPServer.__init__(self, server_address,
1966
1633
RequestHandlerClass)
1967
1968
1634
def server_bind(self):
1969
1635
"""This overrides the normal server_bind() function
1970
1636
to bind to an interface if one was specified, and also NOT to
1978
1644
try:
1979
1645
self.socket.setsockopt(socket.SOL_SOCKET,
1980
1646
SO_BINDTODEVICE,
1981
str(self.interface + '\0'))
1647
str(self.interface
1648
+ '\0'))
1982
1649
except socket.error as error:
1983
if error.errno == errno.EPERM:
1984
logger.error("No permission to bind to"
1985
" interface %s", self.interface)
1986
elif error.errno == errno.ENOPROTOOPT:
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:
1987
1655
logger.error("SO_BINDTODEVICE not available;"
1988
1656
" cannot bind to interface %s",
1989
1657
self.interface)
1990
elif error.errno == errno.ENODEV:
1991
logger.error("Interface %s does not exist,"
1992
" cannot bind", self.interface)
1993
1658
else:
1994
1659
raise
1995
1660
# Only bind(2) the socket if we really need to.
1998
1663
if self.address_family == socket.AF_INET6:
1999
1664
any_address = "::" # in6addr_any
2000
1665
else:
2001
any_address = "0.0.0.0" # INADDR_ANY
1666
any_address = socket.INADDR_ANY
2002
1667
self.server_address = (any_address,
2003
1668
self.server_address[1])
2004
1669
elif not self.server_address[1]:
2025
1690
"""
2026
1691
def __init__(self, server_address, RequestHandlerClass,
2027
1692
interface=None, use_ipv6=True, clients=None,
2028
gnutls_priority=None, use_dbus=True, socketfd=None):
1693
gnutls_priority=None, use_dbus=True):
2029
1694
self.enabled = False
2030
1695
self.clients = clients
2031
1696
if self.clients is None:
2035
1700
IPv6_TCPServer.__init__(self, server_address,
2036
1701
RequestHandlerClass,
2037
1702
interface = interface,
2038
use_ipv6 = use_ipv6,
2039
socketfd = socketfd)
1703
use_ipv6 = use_ipv6)
2040
1704
def server_activate(self):
2041
1705
if self.enabled:
2042
1706
return socketserver.TCPServer.server_activate(self)
2055
1719
2056
1720
def handle_ipc(self, source, condition, parent_pipe=None,
2057
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)
2058
1736
# error, or the other end of multiprocessing.Pipe has closed
2059
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1737
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2060
1738
# Wait for other process to exit
2061
1739
proc.join()
2062
1740
return False
2120
1798
return True
2121
1799
2122
1800
2123
def rfc3339_duration_to_delta(duration):
2124
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2125
2126
>>> rfc3339_duration_to_delta("P7D")
2127
datetime.timedelta(7)
2128
>>> rfc3339_duration_to_delta("PT60S")
2129
datetime.timedelta(0, 60)
2130
>>> rfc3339_duration_to_delta("PT60M")
2131
datetime.timedelta(0, 3600)
2132
>>> rfc3339_duration_to_delta("PT24H")
2133
datetime.timedelta(1)
2134
>>> rfc3339_duration_to_delta("P1W")
2135
datetime.timedelta(7)
2136
>>> rfc3339_duration_to_delta("PT5M30S")
2137
datetime.timedelta(0, 330)
2138
>>> rfc3339_duration_to_delta("P1DT3M20S")
2139
datetime.timedelta(1, 200)
2140
"""
2141
2142
# Parsing an RFC 3339 duration with regular expressions is not
2143
# possible - there would have to be multiple places for the same
2144
# values, like seconds. The current code, while more esoteric, is
2145
# cleaner without depending on a parsing library. If Python had a
2146
# built-in library for parsing we would use it, but we'd like to
2147
# avoid excessive use of external libraries.
2148
2149
# New type for defining tokens, syntax, and semantics all-in-one
2150
Token = collections.namedtuple("Token",
2151
("regexp", # To match token; if
2152
# "value" is not None,
2153
# must have a "group"
2154
# containing digits
2155
"value", # datetime.timedelta or
2156
# None
2157
"followers")) # Tokens valid after
2158
# this token
2159
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2160
# the "duration" ABNF definition in RFC 3339, Appendix A.
2161
token_end = Token(re.compile(r"$"), None, frozenset())
2162
token_second = Token(re.compile(r"(\d+)S"),
2163
datetime.timedelta(seconds=1),
2164
frozenset((token_end,)))
2165
token_minute = Token(re.compile(r"(\d+)M"),
2166
datetime.timedelta(minutes=1),
2167
frozenset((token_second, token_end)))
2168
token_hour = Token(re.compile(r"(\d+)H"),
2169
datetime.timedelta(hours=1),
2170
frozenset((token_minute, token_end)))
2171
token_time = Token(re.compile(r"T"),
2172
None,
2173
frozenset((token_hour, token_minute,
2174
token_second)))
2175
token_day = Token(re.compile(r"(\d+)D"),
2176
datetime.timedelta(days=1),
2177
frozenset((token_time, token_end)))
2178
token_month = Token(re.compile(r"(\d+)M"),
2179
datetime.timedelta(weeks=4),
2180
frozenset((token_day, token_end)))
2181
token_year = Token(re.compile(r"(\d+)Y"),
2182
datetime.timedelta(weeks=52),
2183
frozenset((token_month, token_end)))
2184
token_week = Token(re.compile(r"(\d+)W"),
2185
datetime.timedelta(weeks=1),
2186
frozenset((token_end,)))
2187
token_duration = Token(re.compile(r"P"), None,
2188
frozenset((token_year, token_month,
2189
token_day, token_time,
2190
token_week))),
2191
# Define starting values
2192
value = datetime.timedelta() # Value so far
2193
found_token = None
2194
followers = frozenset(token_duration,) # Following valid tokens
2195
s = duration # String left to parse
2196
# Loop until end token is found
2197
while found_token is not token_end:
2198
# Search for any currently valid tokens
2199
for token in followers:
2200
match = token.regexp.match(s)
2201
if match is not None:
2202
# Token found
2203
if token.value is not None:
2204
# Value found, parse digits
2205
factor = int(match.group(1), 10)
2206
# Add to value so far
2207
value += factor * token.value
2208
# Strip token from string
2209
s = token.regexp.sub("", s, 1)
2210
# Go to found token
2211
found_token = token
2212
# Set valid next tokens
2213
followers = found_token.followers
2214
break
2215
else:
2216
# No currently valid tokens were found
2217
raise ValueError("Invalid RFC 3339 duration")
2218
# End token found
2219
return value
2220
2221
2222
1801
def string_to_delta(interval):
2223
1802
"""Parse a string and return a datetime.timedelta
2224
1803
2235
1814
>>> string_to_delta('5m 30s')
2236
1815
datetime.timedelta(0, 330)
2237
1816
"""
2238
2239
try:
2240
return rfc3339_duration_to_delta(interval)
2241
except ValueError:
2242
pass
2243
2244
1817
timevalue = datetime.timedelta(0)
2245
1818
for s in interval.split():
2246
1819
try:
2257
1830
elif suffix == "w":
2258
1831
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2259
1832
else:
2260
raise ValueError("Unknown suffix {0!r}"
2261
.format(suffix))
2262
except IndexError as e:
1833
raise ValueError("Unknown suffix %r" % suffix)
1834
except (ValueError, IndexError) as e:
2263
1835
raise ValueError(*(e.args))
2264
1836
timevalue += delta
2265
1837
return timevalue
2266
1838
2267
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
2268
1864
def daemon(nochdir = False, noclose = False):
2269
1865
"""See daemon(3). Standard BSD Unix function.
2270
1866
2278
1874
sys.exit()
2279
1875
if not noclose:
2280
1876
# Close all standard open file descriptors
2281
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1877
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2282
1878
if not stat.S_ISCHR(os.fstat(null).st_mode):
2283
1879
raise OSError(errno.ENODEV,
2284
"{0} not a character device"
2285
.format(os.devnull))
1880
"%s not a character device"
1881
% os.path.devnull)
2286
1882
os.dup2(null, sys.stdin.fileno())
2287
1883
os.dup2(null, sys.stdout.fileno())
2288
1884
os.dup2(null, sys.stderr.fileno())
2297
1893
2298
1894
parser = argparse.ArgumentParser()
2299
1895
parser.add_argument("-v", "--version", action="version",
2300
version = "%(prog)s {0}".format(version),
1896
version = "%%(prog)s %s" % version,
2301
1897
help="show version number and exit")
2302
1898
parser.add_argument("-i", "--interface", metavar="IF",
2303
1899
help="Bind to interface IF")
2309
1905
help="Run self-test")
2310
1906
parser.add_argument("--debug", action="store_true",
2311
1907
help="Debug mode; run in foreground and log"
2312
" to terminal", default=None)
1908
" to terminal")
2313
1909
parser.add_argument("--debuglevel", metavar="LEVEL",
2314
1910
help="Debug level for stdout output")
2315
1911
parser.add_argument("--priority", help="GnuTLS"
2322
1918
" files")
2323
1919
parser.add_argument("--no-dbus", action="store_false",
2324
1920
dest="use_dbus", help="Do not provide D-Bus"
2325
" system bus interface", default=None)
1921
" system bus interface")
2326
1922
parser.add_argument("--no-ipv6", action="store_false",
2327
dest="use_ipv6", help="Do not use IPv6",
2328
default=None)
1923
dest="use_ipv6", help="Do not use IPv6")
2329
1924
parser.add_argument("--no-restore", action="store_false",
2330
dest="restore", help="Do not restore stored"
2331
" state", default=None)
2332
parser.add_argument("--socket", type=int,
2333
help="Specify a file descriptor to a network"
2334
" socket to use instead of creating one")
2335
parser.add_argument("--statedir", metavar="DIR",
2336
help="Directory to save/restore state in")
2337
parser.add_argument("--foreground", action="store_true",
2338
help="Run in foreground", default=None)
2339
1925
dest="restore", help="Do not restore stored state",
1926
default=True)
1927
2340
1928
options = parser.parse_args()
2341
1929
2342
1930
if options.check:
2343
1931
import doctest
2344
fail_count, test_count = doctest.testmod()
2345
sys.exit(os.EX_OK if fail_count == 0 else 1)
1932
doctest.testmod()
1933
sys.exit()
2346
1934
2347
1935
# Default values for config file for server-global settings
2348
1936
server_defaults = { "interface": "",
2350
1938
"port": "",
2351
1939
"debug": "False",
2352
1940
"priority":
2353
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1941
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2354
1942
"servicename": "Mandos",
2355
1943
"use_dbus": "True",
2356
1944
"use_ipv6": "True",
2357
1945
"debuglevel": "",
2358
"restore": "True",
2359
"socket": "",
2360
"statedir": "/var/lib/mandos",
2361
"foreground": "False",
2362
1946
}
2363
1947
2364
1948
# Parse config file for server-global settings
2369
1953
# Convert the SafeConfigParser object to a dict
2370
1954
server_settings = server_config.defaults()
2371
1955
# Use the appropriate methods on the non-string config options
2372
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1956
for option in ("debug", "use_dbus", "use_ipv6"):
2373
1957
server_settings[option] = server_config.getboolean("DEFAULT",
2374
1958
option)
2375
1959
if server_settings["port"]:
2376
1960
server_settings["port"] = server_config.getint("DEFAULT",
2377
1961
"port")
2378
if server_settings["socket"]:
2379
server_settings["socket"] = server_config.getint("DEFAULT",
2380
"socket")
2381
# Later, stdin will, and stdout and stderr might, be dup'ed
2382
# over with an opened os.devnull. But we don't want this to
2383
# happen with a supplied network socket.
2384
if 0 <= server_settings["socket"] <= 2:
2385
server_settings["socket"] = os.dup(server_settings
2386
["socket"])
2387
1962
del server_config
2388
1963
2389
1964
# Override the settings from the config file with command line
2390
1965
# options, if set.
2391
1966
for option in ("interface", "address", "port", "debug",
2392
1967
"priority", "servicename", "configdir",
2393
"use_dbus", "use_ipv6", "debuglevel", "restore",
2394
"statedir", "socket", "foreground"):
1968
"use_dbus", "use_ipv6", "debuglevel", "restore"):
2395
1969
value = getattr(options, option)
2396
1970
if value is not None:
2397
1971
server_settings[option] = value
2400
1974
for option in server_settings.keys():
2401
1975
if type(server_settings[option]) is str:
2402
1976
server_settings[option] = unicode(server_settings[option])
2403
# Force all boolean options to be boolean
2404
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2405
"foreground"):
2406
server_settings[option] = bool(server_settings[option])
2407
# Debug implies foreground
2408
if server_settings["debug"]:
2409
server_settings["foreground"] = True
2410
1977
# Now we have our good server settings in "server_settings"
2411
1978
2412
1979
##################################################################
2416
1983
debuglevel = server_settings["debuglevel"]
2417
1984
use_dbus = server_settings["use_dbus"]
2418
1985
use_ipv6 = server_settings["use_ipv6"]
2419
stored_state_path = os.path.join(server_settings["statedir"],
2420
stored_state_file)
2421
foreground = server_settings["foreground"]
2422
2423
if debug:
2424
initlogger(debug, logging.DEBUG)
2425
else:
2426
if not debuglevel:
2427
initlogger(debug)
2428
else:
2429
level = getattr(logging, debuglevel.upper())
2430
initlogger(debug, level)
2431
1986
2432
1987
if server_settings["servicename"] != "Mandos":
2433
1988
syslogger.setFormatter(logging.Formatter
2434
('Mandos ({0}) [%(process)d]:'
2435
' %(levelname)s: %(message)s'
2436
.format(server_settings
2437
["servicename"])))
1989
('Mandos (%s) [%%(process)d]:'
1990
' %%(levelname)s: %%(message)s'
1991
% server_settings["servicename"]))
2438
1992
2439
1993
# Parse config file with clients
2440
client_config = configparser.SafeConfigParser(Client
2441
.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)
2442
2003
client_config.read(os.path.join(server_settings["configdir"],
2443
2004
"clients.conf"))
2444
2005
2453
2014
use_ipv6=use_ipv6,
2454
2015
gnutls_priority=
2455
2016
server_settings["priority"],
2456
use_dbus=use_dbus,
2457
socketfd=(server_settings["socket"]
2458
or None))
2459
if not foreground:
2460
pidfilename = "/run/mandos.pid"
2461
if not os.path.isdir("/run/."):
2462
pidfilename = "/var/run/mandos.pid"
2463
pidfile = None
2017
use_dbus=use_dbus)
2018
if not debug:
2019
pidfilename = "/var/run/mandos.pid"
2464
2020
try:
2465
2021
pidfile = open(pidfilename, "w")
2466
except IOError as e:
2467
logger.error("Could not open file %r", pidfilename,
2468
exc_info=e)
2022
except IOError:
2023
logger.error("Could not open file %r", pidfilename)
2469
2024
2470
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:
2471
2029
try:
2472
uid = pwd.getpwnam(name).pw_uid
2473
gid = pwd.getpwnam(name).pw_gid
2474
break
2030
uid = pwd.getpwnam("mandos").pw_uid
2031
gid = pwd.getpwnam("mandos").pw_gid
2475
2032
except KeyError:
2476
continue
2477
else:
2478
uid = 65534
2479
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
2480
2039
try:
2481
2040
os.setgid(gid)
2482
2041
os.setuid(uid)
2483
2042
except OSError as error:
2484
if error.errno != errno.EPERM:
2485
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)
2486
2051
2487
2052
if debug:
2053
logger.setLevel(logging.DEBUG)
2488
2054
# Enable all possible GnuTLS debugging
2489
2055
2490
2056
# "Use a log level over 10 to enable all debugging options."
2499
2065
.gnutls_global_set_log_function(debug_gnutls))
2500
2066
2501
2067
# Redirect stdin so all checkers get /dev/null
2502
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2068
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2503
2069
os.dup2(null, sys.stdin.fileno())
2504
2070
if null > 2:
2505
2071
os.close(null)
2072
else:
2073
# No console logging
2074
logger.removeHandler(console)
2506
2075
2507
2076
# Need to fork before connecting to D-Bus
2508
if not foreground:
2077
if not debug:
2509
2078
# Close all input and output, do double fork, etc.
2510
2079
daemon()
2511
2080
2512
# multiprocessing will use threads, so before we use gobject we
2513
# need to inform gobject that threads will be used.
2514
gobject.threads_init()
2515
2516
2081
global main_loop
2517
2082
# From the Avahi example code
2518
DBusGMainLoop(set_as_default=True)
2083
DBusGMainLoop(set_as_default=True )
2519
2084
main_loop = gobject.MainLoop()
2520
2085
bus = dbus.SystemBus()
2521
2086
# End of Avahi example code
2527
2092
("se.bsnet.fukt.Mandos", bus,
2528
2093
do_not_queue=True))
2529
2094
except dbus.exceptions.NameExistsException as e:
2530
logger.error("Disabling D-Bus:", exc_info=e)
2095
logger.error(unicode(e) + ", disabling D-Bus")
2531
2096
use_dbus = False
2532
2097
server_settings["use_dbus"] = False
2533
2098
tcp_server.use_dbus = False
2545
2110
2546
2111
client_class = Client
2547
2112
if use_dbus:
2548
client_class = functools.partial(ClientDBus, bus = bus)
2549
2550
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
2551
2133
old_client_settings = {}
2552
clients_data = {}
2553
2554
# This is used to redirect stdout and stderr for checker processes
2555
global wnull
2556
wnull = open(os.devnull, "w") # A writable /dev/null
2557
# Only used if server is running in foreground but not in debug
2558
# mode
2559
if debug or not foreground:
2560
wnull.close()
2561
2562
# Get client data and settings from last running state.
2134
clients_data = []
2135
2136
# Get client data and settings from last running state.
2563
2137
if server_settings["restore"]:
2564
2138
try:
2565
2139
with open(stored_state_path, "rb") as stored_state:
2566
clients_data, old_client_settings = (pickle.load
2567
(stored_state))
2140
clients_data, old_client_settings = pickle.load(stored_state)
2568
2141
os.remove(stored_state_path)
2569
2142
except IOError as e:
2570
if e.errno == errno.ENOENT:
2571
logger.warning("Could not load persistent state: {0}"
2572
.format(os.strerror(e.errno)))
2573
else:
2574
logger.critical("Could not load persistent state:",
2575
exc_info=e)
2143
logger.warning("Could not load persistant state: {0}".format(e))
2144
if e.errno != errno.ENOENT:
2576
2145
raise
2577
except EOFError as e:
2578
logger.warning("Could not load persistent state: "
2579
"EOFError:", exc_info=e)
2580
2581
with PGPEngine() as pgp:
2582
for client_name, client in clients_data.iteritems():
2583
# Skip removed clients
2584
if client_name not in client_settings:
2585
continue
2586
2587
# Decide which value to use after restoring saved state.
2588
# We have three different values: Old config file,
2589
# new config file, and saved state.
2590
# New config value takes precedence if it differs from old
2591
# config value, otherwise use saved state.
2592
for name, value in client_settings[client_name].items():
2593
try:
2594
# For each value in new config, check if it
2595
# differs from the old config value (Except for
2596
# the "secret" attribute)
2597
if (name != "secret" and
2598
value != old_client_settings[client_name]
2599
[name]):
2600
client[name] = value
2601
except KeyError:
2602
pass
2603
2604
# Clients who has passed its expire date can still be
2605
# enabled if its last checker was successful. Clients
2606
# whose checker succeeded before we stored its state is
2607
# assumed to have successfully run all checkers during
2608
# downtime.
2609
if client["enabled"]:
2610
if datetime.datetime.utcnow() >= client["expires"]:
2611
if not client["last_checked_ok"]:
2612
logger.warning(
2613
"disabling client {0} - Client never "
2614
"performed a successful checker"
2615
.format(client_name))
2616
client["enabled"] = False
2617
elif client["last_checker_status"] != 0:
2618
logger.warning(
2619
"disabling client {0} - Client "
2620
"last checker failed with error code {1}"
2621
.format(client_name,
2622
client["last_checker_status"]))
2623
client["enabled"] = False
2624
else:
2625
client["expires"] = (datetime.datetime
2626
.utcnow()
2627
+ client["timeout"])
2628
logger.debug("Last checker succeeded,"
2629
" keeping {0} enabled"
2630
.format(client_name))
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():
2631
2156
try:
2632
client["secret"] = (
2633
pgp.decrypt(client["encrypted_secret"],
2634
client_settings[client_name]
2635
["secret"]))
2636
except PGPError:
2637
# If decryption fails, we use secret from new settings
2638
logger.debug("Failed to decrypt {0} old secret"
2639
.format(client_name))
2640
client["secret"] = (
2641
client_settings[client_name]["secret"])
2642
2643
# Add/remove clients based on new changes made to config
2644
for client_name in (set(old_client_settings)
2645
- set(client_settings)):
2646
del clients_data[client_name]
2647
for client_name in (set(client_settings)
2648
- set(old_client_settings)):
2649
clients_data[client_name] = client_settings[client_name]
2650
2651
# Create all client objects
2652
for client_name, client in clients_data.iteritems():
2653
tcp_server.clients[client_name] = client_class(
2654
name = client_name, settings = client,
2655
server_settings = server_settings)
2656
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
2657
2211
if not tcp_server.clients:
2658
2212
logger.warning("No clients defined")
2659
2660
if not foreground:
2661
if pidfile is not None:
2662
try:
2663
with pidfile:
2664
pid = os.getpid()
2665
pidfile.write(str(pid) + "\n".encode("utf-8"))
2666
except IOError:
2667
logger.error("Could not write to file %r with PID %d",
2668
pidfilename, pid)
2669
del pidfile
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
2670
2226
del pidfilename
2227
2228
signal.signal(signal.SIGINT, signal.SIG_IGN)
2671
2229
2672
2230
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2673
2231
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2674
2232
2675
2233
if use_dbus:
2676
@alternate_dbus_interfaces({"se.recompile.Mandos":
2677
"se.bsnet.fukt.Mandos"})
2678
class MandosDBusService(DBusObjectWithProperties):
2234
class MandosDBusService(dbus.service.Object):
2679
2235
"""A D-Bus proxy object"""
2680
2236
def __init__(self):
2681
2237
dbus.service.Object.__init__(self, bus, "/")
2682
2238
_interface = "se.recompile.Mandos"
2683
2239
2684
@dbus_interface_annotations(_interface)
2685
def _foo(self):
2686
return { "org.freedesktop.DBus.Property"
2687
".EmitsChangedSignal":
2688
"false"}
2689
2690
2240
@dbus.service.signal(_interface, signature="o")
2691
2241
def ClientAdded(self, objpath):
2692
2242
"D-Bus signal"
2734
2284
2735
2285
del _interface
2736
2286
2737
mandos_dbus_service = MandosDBusService()
2287
class MandosDBusServiceTransitional(MandosDBusService):
2288
__metaclass__ = AlternateDBusNamesMetaclass
2289
mandos_dbus_service = MandosDBusServiceTransitional()
2738
2290
2739
2291
def cleanup():
2740
2292
"Cleanup function; run on exit"
2741
2293
service.cleanup()
2742
2294
2743
2295
multiprocessing.active_children()
2744
wnull.close()
2745
2296
if not (tcp_server.clients or client_settings):
2746
2297
return
2747
2748
# Store client before exiting. Secrets are encrypted with key
2749
# based on what config file has. If config file is
2750
# removed/edited, old secret will thus be unrecovable.
2751
clients = {}
2752
with PGPEngine() as pgp:
2753
for client in tcp_server.clients.itervalues():
2754
key = client_settings[client.name]["secret"]
2755
client.encrypted_secret = pgp.encrypt(client.secret,
2756
key)
2757
client_dict = {}
2758
2759
# A list of attributes that can not be pickled
2760
# + secret.
2761
exclude = set(("bus", "changedstate", "secret",
2762
"checker", "server_settings"))
2763
for name, typ in (inspect.getmembers
2764
(dbus.service.Object)):
2765
exclude.add(name)
2766
2767
client_dict["encrypted_secret"] = (client
2768
.encrypted_secret)
2769
for attr in client.client_structure:
2770
if attr not in exclude:
2771
client_dict[attr] = getattr(client, attr)
2772
2773
clients[client.name] = client_dict
2774
del client_settings[client.name]["secret"]
2775
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
2776
2321
try:
2777
with (tempfile.NamedTemporaryFile
2778
(mode='wb', suffix=".pickle", prefix='clients-',
2779
dir=os.path.dirname(stored_state_path),
2780
delete=False)) as stored_state:
2322
with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2781
2323
pickle.dump((clients, client_settings), stored_state)
2782
tempname=stored_state.name
2783
os.rename(tempname, stored_state_path)
2784
except (IOError, OSError) as e:
2785
if not debug:
2786
try:
2787
os.remove(tempname)
2788
except NameError:
2789
pass
2790
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2791
logger.warning("Could not save persistent state: {0}"
2792
.format(os.strerror(e.errno)))
2793
else:
2794
logger.warning("Could not save persistent state:",
2795
exc_info=e)
2324
except IOError as e:
2325
logger.warning("Could not save persistant state: {0}".format(e))
2326
if e.errno != errno.ENOENT:
2796
2327
raise
2797
2328
2798
2329
# Delete all clients, and settings from config
2799
2330
while tcp_server.clients:
2800
2331
name, client = tcp_server.clients.popitem()
2818
2349
# Need to initiate checking of clients
2819
2350
if client.enabled:
2820
2351
client.init_checker()
2352
2821
2353
2822
2354
tcp_server.enable()
2823
2355
tcp_server.server_activate()
2826
2358
service.port = tcp_server.socket.getsockname()[1]
2827
2359
if use_ipv6:
2828
2360
logger.info("Now listening on address %r, port %d,"
2829
" flowinfo %d, scope_id %d",
2830
*tcp_server.socket.getsockname())
2361
" flowinfo %d, scope_id %d"
2362
% tcp_server.socket.getsockname())
2831
2363
else: # IPv4
2832
logger.info("Now listening on address %r, port %d",
2833
*tcp_server.socket.getsockname())
2364
logger.info("Now listening on address %r, port %d"
2365
% tcp_server.socket.getsockname())
2834
2366
2835
2367
#service.interface = tcp_server.socket.getsockname()[3]
2836
2368
2839
2371
try:
2840
2372
service.activate()
2841
2373
except dbus.exceptions.DBusException as error:
2842
logger.critical("D-Bus Exception", exc_info=error)
2374
logger.critical("DBusException: %s", error)
2843
2375
cleanup()
2844
2376
sys.exit(1)
2845
2377
# End of Avahi example code
2852
2384
logger.debug("Starting main loop")
2853
2385
main_loop.run()
2854
2386
except AvahiError as error:
2855
logger.critical("Avahi Error", exc_info=error)
2387
logger.critical("AvahiError: %s", error)
2856
2388
cleanup()
2857
2389
sys.exit(1)
2858
2390
except KeyboardInterrupt:
2863
2395
# Must run before the D-Bus bus name gets deregistered
2864
2396
cleanup()
2865
2397
2398
2866
2399
if __name__ == '__main__':
2867
2400
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0