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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
global syslogger
118
syslogger = (logging.handlers.SysLogHandler
119
(facility =
120
logging.handlers.SysLogHandler.LOG_DAEMON,
121
address = str("/dev/log")))
122
syslogger.setFormatter(logging.Formatter
123
('Mandos [%(process)d]: %(levelname)s:'
124
' %(message)s'))
125
logger.addHandler(syslogger)
126
127
if debug:
128
console = logging.StreamHandler()
129
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
130
' [%(process)d]:'
131
' %(levelname)s:'
132
' %(message)s'))
133
logger.addHandler(console)
134
logger.setLevel(level)
135
136
137
class PGPError(Exception):
138
"""Exception if encryption/decryption fails"""
139
pass
140
141
142
class PGPEngine(object):
143
"""A simple class for OpenPGP symmetric encryption & decryption"""
144
def __init__(self):
145
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
146
self.gnupgargs = ['--batch',
147
'--home', self.tempdir,
148
'--force-mdc',
149
'--quiet',
150
'--no-use-agent']
151
152
def __enter__(self):
153
return self
154
155
def __exit__(self, exc_type, exc_value, traceback):
156
self._cleanup()
157
return False
158
159
def __del__(self):
160
self._cleanup()
161
162
def _cleanup(self):
163
if self.tempdir is not None:
164
# Delete contents of tempdir
165
for root, dirs, files in os.walk(self.tempdir,
166
topdown = False):
167
for filename in files:
168
os.remove(os.path.join(root, filename))
169
for dirname in dirs:
170
os.rmdir(os.path.join(root, dirname))
171
# Remove tempdir
172
os.rmdir(self.tempdir)
173
self.tempdir = None
174
175
def password_encode(self, password):
176
# Passphrase can not be empty and can not contain newlines or
177
# NUL bytes. So we prefix it and hex encode it.
178
encoded = b"mandos" + binascii.hexlify(password)
179
if len(encoded) > 2048:
180
# GnuPG can't handle long passwords, so encode differently
181
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
182
.replace(b"\n", b"\\n")
183
.replace(b"\0", b"\\x00"))
184
return encoded
185
186
def encrypt(self, data, password):
187
passphrase = self.password_encode(password)
188
with tempfile.NamedTemporaryFile(dir=self.tempdir
189
) as passfile:
190
passfile.write(passphrase)
191
passfile.flush()
192
proc = subprocess.Popen(['gpg', '--symmetric',
193
'--passphrase-file',
194
passfile.name]
195
+ self.gnupgargs,
196
stdin = subprocess.PIPE,
197
stdout = subprocess.PIPE,
198
stderr = subprocess.PIPE)
199
ciphertext, err = proc.communicate(input = data)
200
if proc.returncode != 0:
201
raise PGPError(err)
202
return ciphertext
203
204
def decrypt(self, data, password):
205
passphrase = self.password_encode(password)
206
with tempfile.NamedTemporaryFile(dir = self.tempdir
207
) as passfile:
208
passfile.write(passphrase)
209
passfile.flush()
210
proc = subprocess.Popen(['gpg', '--decrypt',
211
'--passphrase-file',
212
passfile.name]
213
+ self.gnupgargs,
214
stdin = subprocess.PIPE,
215
stdout = subprocess.PIPE,
216
stderr = subprocess.PIPE)
217
decrypted_plaintext, err = proc.communicate(input
218
= data)
219
if proc.returncode != 0:
220
raise PGPError(err)
221
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)
222
107
223
108
224
109
class AvahiError(Exception):
243
128
Used to optionally bind to the specified interface.
244
129
name: string; Example: 'Mandos'
245
130
type: string; Example: '_mandos._tcp'.
246
See <https://www.iana.org/assignments/service-names-port-numbers>
131
See <http://www.dns-sd.org/ServiceTypes.html>
247
132
port: integer; what port to announce
248
133
TXT: list of strings; TXT record for the service
249
134
domain: string; Domain to publish on, default to .local if empty.
255
140
server: D-Bus Server
256
141
bus: dbus.SystemBus()
257
142
"""
258
259
143
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
260
144
servicetype = None, port = None, TXT = None,
261
145
domain = "", host = "", max_renames = 32768,
274
158
self.server = None
275
159
self.bus = bus
276
160
self.entry_group_state_changed_match = None
277
278
161
def rename(self):
279
162
"""Derived from the Avahi example code"""
280
163
if self.rename_count >= self.max_renames:
290
173
try:
291
174
self.add()
292
175
except dbus.exceptions.DBusException as error:
293
logger.critical("D-Bus Exception", exc_info=error)
176
logger.critical("DBusException: %s", error)
294
177
self.cleanup()
295
178
os._exit(1)
296
179
self.rename_count += 1
297
298
180
def remove(self):
299
181
"""Derived from the Avahi example code"""
300
182
if self.entry_group_state_changed_match is not None:
302
184
self.entry_group_state_changed_match = None
303
185
if self.group is not None:
304
186
self.group.Reset()
305
306
187
def add(self):
307
188
"""Derived from the Avahi example code"""
308
189
self.remove()
325
206
dbus.UInt16(self.port),
326
207
avahi.string_array_to_txt_array(self.TXT))
327
208
self.group.Commit()
328
329
209
def entry_group_state_changed(self, state, error):
330
210
"""Derived from the Avahi example code"""
331
211
logger.debug("Avahi entry group state change: %i", state)
338
218
elif state == avahi.ENTRY_GROUP_FAILURE:
339
219
logger.critical("Avahi: Error in group state changed %s",
340
220
unicode(error))
341
raise AvahiGroupError("State changed: {0!s}"
342
.format(error))
343
221
raise AvahiGroupError("State changed: %s"
222
% unicode(error))
344
223
def cleanup(self):
345
224
"""Derived from the Avahi example code"""
346
225
if self.group is not None:
347
226
try:
348
227
self.group.Free()
349
228
except (dbus.exceptions.UnknownMethodException,
350
dbus.exceptions.DBusException):
229
dbus.exceptions.DBusException) as e:
351
230
pass
352
231
self.group = None
353
232
self.remove()
354
355
233
def server_state_changed(self, state, error=None):
356
234
"""Derived from the Avahi example code"""
357
235
logger.debug("Avahi server state change: %i", state)
376
254
logger.debug("Unknown state: %r", state)
377
255
else:
378
256
logger.debug("Unknown state: %r: %r", state, error)
379
380
257
def activate(self):
381
258
"""Derived from the Avahi example code"""
382
259
if self.server is None:
389
266
self.server_state_changed)
390
267
self.server_state_changed(self.server.GetState())
391
268
392
393
269
class AvahiServiceToSyslog(AvahiService):
394
270
def rename(self):
395
271
"""Add the new name to the syslog messages"""
396
272
ret = AvahiService.rename(self)
397
273
syslogger.setFormatter(logging.Formatter
398
('Mandos ({0}) [%(process)d]:'
399
' %(levelname)s: %(message)s'
400
.format(self.name)))
274
('Mandos (%s) [%%(process)d]:'
275
' %%(levelname)s: %%(message)s'
276
% self.name))
401
277
return ret
402
278
403
404
def timedelta_to_milliseconds(td):
279
def _timedelta_to_milliseconds(td):
405
280
"Convert a datetime.timedelta() to milliseconds"
406
281
return ((td.days * 24 * 60 * 60 * 1000)
407
282
+ (td.seconds * 1000)
408
283
+ (td.microseconds // 1000))
409
410
284
411
285
class Client(object):
412
286
"""A representation of a client host served by this server.
413
287
414
288
Attributes:
415
approved: bool(); 'None' if not yet approved/disapproved
289
_approved: bool(); 'None' if not yet approved/disapproved
416
290
approval_delay: datetime.timedelta(); Time to wait for approval
417
291
approval_duration: datetime.timedelta(); Duration of one approval
418
292
checker: subprocess.Popen(); a running checker process used
436
310
interval: datetime.timedelta(); How often to start a new checker
437
311
last_approval_request: datetime.datetime(); (UTC) or None
438
312
last_checked_ok: datetime.datetime(); (UTC) or None
439
last_checker_status: integer between 0 and 255 reflecting exit
440
status of last checker. -1 reflects crashed
441
checker, -2 means no checker completed yet.
442
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)
443
317
name: string; from the config file, used in log messages and
444
318
D-Bus identifiers
445
319
secret: bytestring; sent verbatim (over TLS) to client
446
320
timeout: datetime.timedelta(); How long from last_checked_ok
447
321
until this client is disabled
448
extended_timeout: extra long timeout when secret has been sent
322
extended_timeout: extra long timeout when password has been sent
449
323
runtime_expansions: Allowed attributes for runtime expansion.
450
324
expires: datetime.datetime(); time (UTC) when a client will be
451
325
disabled, or None
452
server_settings: The server_settings dict from main()
453
326
"""
454
327
455
328
runtime_expansions = ("approval_delay", "approval_duration",
456
"created", "enabled", "expires",
457
"fingerprint", "host", "interval",
458
"last_approval_request", "last_checked_ok",
329
"created", "enabled", "fingerprint",
330
"host", "interval", "last_checked_ok",
459
331
"last_enabled", "name", "timeout")
460
client_defaults = { "timeout": "PT5M",
461
"extended_timeout": "PT15M",
462
"interval": "PT2M",
463
"checker": "fping -q -- %%(host)s",
464
"host": "",
465
"approval_delay": "PT0S",
466
"approval_duration": "PT1S",
467
"approved_by_default": "True",
468
"enabled": "True",
469
}
470
332
471
333
def timeout_milliseconds(self):
472
334
"Return the 'timeout' attribute in milliseconds"
473
return timedelta_to_milliseconds(self.timeout)
335
return _timedelta_to_milliseconds(self.timeout)
474
336
475
337
def extended_timeout_milliseconds(self):
476
338
"Return the 'extended_timeout' attribute in milliseconds"
477
return timedelta_to_milliseconds(self.extended_timeout)
339
return _timedelta_to_milliseconds(self.extended_timeout)
478
340
479
341
def interval_milliseconds(self):
480
342
"Return the 'interval' attribute in milliseconds"
481
return timedelta_to_milliseconds(self.interval)
343
return _timedelta_to_milliseconds(self.interval)
482
344
483
345
def approval_delay_milliseconds(self):
484
return timedelta_to_milliseconds(self.approval_delay)
485
486
@staticmethod
487
def config_parser(config):
488
"""Construct a new dict of client settings of this form:
489
{ client_name: {setting_name: value, ...}, ...}
490
with exceptions for any special settings as defined above.
491
NOTE: Must be a pure function. Must return the same result
492
value given the same arguments.
493
"""
494
settings = {}
495
for client_name in config.sections():
496
section = dict(config.items(client_name))
497
client = settings[client_name] = {}
498
499
client["host"] = section["host"]
500
# Reformat values from string types to Python types
501
client["approved_by_default"] = config.getboolean(
502
client_name, "approved_by_default")
503
client["enabled"] = config.getboolean(client_name,
504
"enabled")
505
506
client["fingerprint"] = (section["fingerprint"].upper()
507
.replace(" ", ""))
508
if "secret" in section:
509
client["secret"] = section["secret"].decode("base64")
510
elif "secfile" in section:
511
with open(os.path.expanduser(os.path.expandvars
512
(section["secfile"])),
513
"rb") as secfile:
514
client["secret"] = secfile.read()
515
else:
516
raise TypeError("No secret or secfile for section {0}"
517
.format(section))
518
client["timeout"] = string_to_delta(section["timeout"])
519
client["extended_timeout"] = string_to_delta(
520
section["extended_timeout"])
521
client["interval"] = string_to_delta(section["interval"])
522
client["approval_delay"] = string_to_delta(
523
section["approval_delay"])
524
client["approval_duration"] = string_to_delta(
525
section["approval_duration"])
526
client["checker_command"] = section["checker"]
527
client["last_approval_request"] = None
528
client["last_checked_ok"] = None
529
client["last_checker_status"] = -2
530
531
return settings
532
533
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."""
534
352
self.name = name
535
if server_settings is None:
536
server_settings = {}
537
self.server_settings = server_settings
538
# adding all client settings
539
for setting, value in settings.iteritems():
540
setattr(self, setting, value)
541
542
if self.enabled:
543
if not hasattr(self, "last_enabled"):
544
self.last_enabled = datetime.datetime.utcnow()
545
if not hasattr(self, "expires"):
546
self.expires = (datetime.datetime.utcnow()
547
+ self.timeout)
548
else:
549
self.last_enabled = None
550
self.expires = None
551
353
if config is None:
354
config = {}
552
355
logger.debug("Creating client %r", self.name)
553
356
# Uppercase and remove spaces from fingerprint for later
554
357
# comparison purposes with return value from the fingerprint()
555
358
# function
359
self.fingerprint = (config["fingerprint"].upper()
360
.replace(" ", ""))
556
361
logger.debug(" Fingerprint: %s", self.fingerprint)
557
self.created = settings.get("created",
558
datetime.datetime.utcnow())
559
560
# 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"])
561
383
self.checker = None
562
384
self.checker_initiator_tag = None
563
385
self.disable_initiator_tag = None
386
self.expires = datetime.datetime.utcnow() + self.timeout
564
387
self.checker_callback_tag = None
388
self.checker_command = config["checker"]
565
389
self.current_checker_command = None
566
self.approved = None
390
self._approved = None
391
self.approved_by_default = config.get("approved_by_default",
392
True)
567
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"])
568
398
self.changedstate = (multiprocessing_manager
569
399
.Condition(multiprocessing_manager
570
400
.Lock()))
571
self.client_structure = [attr for attr in
572
self.__dict__.iterkeys()
573
if not attr.startswith("_")]
401
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
574
402
self.client_structure.append("client_structure")
575
403
404
576
405
for name, t in inspect.getmembers(type(self),
577
lambda obj:
578
isinstance(obj,
579
property)):
406
lambda obj: isinstance(obj, property)):
580
407
if not name.startswith("_"):
581
408
self.client_structure.append(name)
582
409
590
417
if getattr(self, "enabled", False):
591
418
# Already enabled
592
419
return
420
self.send_changedstate()
593
421
self.expires = datetime.datetime.utcnow() + self.timeout
594
422
self.enabled = True
595
423
self.last_enabled = datetime.datetime.utcnow()
596
424
self.init_checker()
597
self.send_changedstate()
598
425
599
426
def disable(self, quiet=True):
600
427
"""Disable this client."""
601
428
if not getattr(self, "enabled", False):
602
429
return False
603
430
if not quiet:
431
self.send_changedstate()
432
if not quiet:
604
433
logger.info("Disabling client %s", self.name)
605
if getattr(self, "disable_initiator_tag", None) is not None:
434
if getattr(self, "disable_initiator_tag", False):
606
435
gobject.source_remove(self.disable_initiator_tag)
607
436
self.disable_initiator_tag = None
608
437
self.expires = None
609
if getattr(self, "checker_initiator_tag", None) is not None:
438
if getattr(self, "checker_initiator_tag", False):
610
439
gobject.source_remove(self.checker_initiator_tag)
611
440
self.checker_initiator_tag = None
612
441
self.stop_checker()
613
442
self.enabled = False
614
if not quiet:
615
self.send_changedstate()
616
443
# Do not run this again if called by a gobject.timeout_add
617
444
return False
618
445
619
446
def __del__(self):
620
447
self.disable()
621
448
622
449
def init_checker(self):
623
450
# Schedule a new checker to be started an 'interval' from now,
624
451
# and every interval from then on.
625
if self.checker_initiator_tag is not None:
626
gobject.source_remove(self.checker_initiator_tag)
627
452
self.checker_initiator_tag = (gobject.timeout_add
628
453
(self.interval_milliseconds(),
629
454
self.start_checker))
630
455
# Schedule a disable() when 'timeout' has passed
631
if self.disable_initiator_tag is not None:
632
gobject.source_remove(self.disable_initiator_tag)
633
456
self.disable_initiator_tag = (gobject.timeout_add
634
457
(self.timeout_milliseconds(),
635
458
self.disable))
636
459
# Also start a new checker *right now*.
637
460
self.start_checker()
638
461
462
639
463
def checker_callback(self, pid, condition, command):
640
464
"""The checker has completed, so take appropriate actions."""
641
465
self.checker_callback_tag = None
642
466
self.checker = None
643
467
if os.WIFEXITED(condition):
644
self.last_checker_status = os.WEXITSTATUS(condition)
468
self.last_checker_status = os.WEXITSTATUS(condition)
645
469
if self.last_checker_status == 0:
646
470
logger.info("Checker for %(name)s succeeded",
647
471
vars(self))
654
478
logger.warning("Checker for %(name)s crashed?",
655
479
vars(self))
656
480
657
def checked_ok(self):
658
"""Assert that the client has been seen, alive and well."""
659
self.last_checked_ok = datetime.datetime.utcnow()
660
self.last_checker_status = 0
661
self.bump_timeout()
662
663
def bump_timeout(self, timeout=None):
664
"""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
"""
665
487
if timeout is None:
666
488
timeout = self.timeout
489
self.last_checked_ok = datetime.datetime.utcnow()
667
490
if self.disable_initiator_tag is not None:
668
491
gobject.source_remove(self.disable_initiator_tag)
669
self.disable_initiator_tag = None
670
492
if getattr(self, "enabled", False):
671
493
self.disable_initiator_tag = (gobject.timeout_add
672
(timedelta_to_milliseconds
494
(_timedelta_to_milliseconds
673
495
(timeout), self.disable))
674
496
self.expires = datetime.datetime.utcnow() + timeout
675
497
682
504
If a checker already exists, leave it running and do
683
505
nothing."""
684
506
# The reason for not killing a running checker is that if we
685
# did that, and if a checker (for some reason) started running
686
# slowly and taking more than 'interval' time, then the client
687
# would inevitably timeout, since no checker would get a
688
# 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
689
511
# checkers alone, the checker would have to take more time
690
512
# than 'timeout' for the client to be disabled, which is as it
691
513
# should be.
693
515
# If a checker exists, make sure it is not a zombie
694
516
try:
695
517
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
696
except AttributeError:
697
pass
698
except OSError as error:
699
if error.errno != errno.ECHILD:
700
raise
518
except (AttributeError, OSError) as error:
519
if (isinstance(error, OSError)
520
and error.errno != errno.ECHILD):
521
raise error
701
522
else:
702
523
if pid:
703
524
logger.warning("Checker was a zombie")
706
527
self.current_checker_command)
707
528
# Start a new checker if needed
708
529
if self.checker is None:
709
# Escape attributes for the shell
710
escaped_attrs = dict(
711
(attr, re.escape(unicode(getattr(self, attr))))
712
for attr in
713
self.runtime_expansions)
714
530
try:
715
command = self.checker_command % escaped_attrs
716
except TypeError as error:
717
logger.error('Could not format string "%s"',
718
self.checker_command, exc_info=error)
719
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
720
549
self.current_checker_command = command
721
550
try:
722
551
logger.info("Starting checker %r for %s",
725
554
# in normal mode, that is already done by daemon(),
726
555
# and in debug mode we don't want to. (Stdin is
727
556
# always replaced by /dev/null.)
728
# The exception is when not debugging but nevertheless
729
# running in the foreground; use the previously
730
# created wnull.
731
popen_args = {}
732
if (not self.server_settings["debug"]
733
and self.server_settings["foreground"]):
734
popen_args.update({"stdout": wnull,
735
"stderr": wnull })
736
557
self.checker = subprocess.Popen(command,
737
558
close_fds=True,
738
shell=True, cwd="/",
739
**popen_args)
740
except OSError as error:
741
logger.error("Failed to start subprocess",
742
exc_info=error)
743
return True
744
self.checker_callback_tag = (gobject.child_watch_add
745
(self.checker.pid,
746
self.checker_callback,
747
data=command))
748
# The checker may have completed before the gobject
749
# watch was added. Check for this.
750
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.
751
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)
752
570
except OSError as error:
753
if error.errno == errno.ECHILD:
754
# This should never happen
755
logger.error("Child process vanished",
756
exc_info=error)
757
return True
758
raise
759
if pid:
760
gobject.source_remove(self.checker_callback_tag)
761
self.checker_callback(pid, status, command)
571
logger.error("Failed to start subprocess: %s",
572
error)
762
573
# Re-run this periodically if run by gobject.timeout_add
763
574
return True
764
575
771
582
return
772
583
logger.debug("Stopping checker for %(name)s", vars(self))
773
584
try:
774
self.checker.terminate()
585
os.kill(self.checker.pid, signal.SIGTERM)
775
586
#time.sleep(0.5)
776
587
#if self.checker.poll() is None:
777
# self.checker.kill()
588
# os.kill(self.checker.pid, signal.SIGKILL)
778
589
except OSError as error:
779
590
if error.errno != errno.ESRCH: # No such process
780
591
raise
781
592
self.checker = None
782
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
783
640
784
641
def dbus_service_property(dbus_interface, signature="v",
785
642
access="readwrite", byte_arrays=False):
797
654
# "Set" method, so we fail early here:
798
655
if byte_arrays and signature != "ay":
799
656
raise ValueError("Byte arrays not supported for non-'ay'"
800
" signature {0!r}".format(signature))
657
" signature %r" % signature)
801
658
def decorator(func):
802
659
func._dbus_is_property = True
803
660
func._dbus_interface = dbus_interface
811
668
return decorator
812
669
813
670
814
def dbus_interface_annotations(dbus_interface):
815
"""Decorator for marking functions returning interface annotations
816
817
Usage:
818
819
@dbus_interface_annotations("org.example.Interface")
820
def _foo(self): # Function name does not matter
821
return {"org.freedesktop.DBus.Deprecated": "true",
822
"org.freedesktop.DBus.Property.EmitsChangedSignal":
823
"false"}
824
"""
825
def decorator(func):
826
func._dbus_is_interface = True
827
func._dbus_interface = dbus_interface
828
func._dbus_name = dbus_interface
829
return func
830
return decorator
831
832
833
def dbus_annotations(annotations):
834
"""Decorator to annotate D-Bus methods, signals or properties
835
Usage:
836
837
@dbus_service_property("org.example.Interface", signature="b",
838
access="r")
839
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
840
"org.freedesktop.DBus.Property."
841
"EmitsChangedSignal": "false"})
842
def Property_dbus_property(self):
843
return dbus.Boolean(False)
844
"""
845
def decorator(func):
846
func._dbus_annotations = annotations
847
return func
848
return decorator
849
850
851
671
class DBusPropertyException(dbus.exceptions.DBusException):
852
672
"""A base class for D-Bus property-related exceptions
853
673
"""
876
696
"""
877
697
878
698
@staticmethod
879
def _is_dbus_thing(thing):
880
"""Returns a function testing if an attribute is a D-Bus thing
881
882
If called like _is_dbus_thing("method") it returns a function
883
suitable for use as predicate to inspect.getmembers().
884
"""
885
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
886
False)
699
def _is_dbus_property(obj):
700
return getattr(obj, "_dbus_is_property", False)
887
701
888
def _get_all_dbus_things(self, thing):
702
def _get_all_dbus_properties(self):
889
703
"""Returns a generator of (name, attribute) pairs
890
704
"""
891
return ((getattr(athing.__get__(self), "_dbus_name",
892
name),
893
athing.__get__(self))
705
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
894
706
for cls in self.__class__.__mro__
895
for name, athing in
896
inspect.getmembers(cls,
897
self._is_dbus_thing(thing)))
707
for name, prop in
708
inspect.getmembers(cls, self._is_dbus_property))
898
709
899
710
def _get_dbus_property(self, interface_name, property_name):
900
711
"""Returns a bound method if one exists which is a D-Bus
902
713
"""
903
714
for cls in self.__class__.__mro__:
904
715
for name, value in (inspect.getmembers
905
(cls,
906
self._is_dbus_thing("property"))):
716
(cls, self._is_dbus_property)):
907
717
if (value._dbus_name == property_name
908
718
and value._dbus_interface == interface_name):
909
719
return value.__get__(self)
937
747
# The byte_arrays option is not supported yet on
938
748
# signatures other than "ay".
939
749
if prop._dbus_signature != "ay":
940
raise ValueError("Byte arrays not supported for non-"
941
"'ay' signature {0!r}"
942
.format(prop._dbus_signature))
943
value = dbus.ByteArray(b''.join(chr(byte)
944
for byte in value))
750
raise ValueError
751
value = dbus.ByteArray(''.join(unichr(byte)
752
for byte in value))
945
753
prop(value)
946
754
947
755
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
952
760
953
761
Note: Will not include properties with access="write".
954
762
"""
955
properties = {}
956
for name, prop in self._get_all_dbus_things("property"):
763
all = {}
764
for name, prop in self._get_all_dbus_properties():
957
765
if (interface_name
958
766
and interface_name != prop._dbus_interface):
959
767
# Interface non-empty but did not match
963
771
continue
964
772
value = prop()
965
773
if not hasattr(value, "variant_level"):
966
properties[name] = value
774
all[name] = value
967
775
continue
968
properties[name] = type(value)(value, variant_level=
969
value.variant_level+1)
970
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")
971
779
972
780
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
973
781
out_signature="s",
974
782
path_keyword='object_path',
975
783
connection_keyword='connection')
976
784
def Introspect(self, object_path, connection):
977
"""Overloading of standard D-Bus method.
978
979
Inserts property tags and interface annotation tags.
785
"""Standard D-Bus method, overloaded to insert property tags.
980
786
"""
981
787
xmlstring = dbus.service.Object.Introspect(self, object_path,
982
788
connection)
989
795
e.setAttribute("access", prop._dbus_access)
990
796
return e
991
797
for if_tag in document.getElementsByTagName("interface"):
992
# Add property tags
993
798
for tag in (make_tag(document, name, prop)
994
799
for name, prop
995
in self._get_all_dbus_things("property")
800
in self._get_all_dbus_properties()
996
801
if prop._dbus_interface
997
802
== if_tag.getAttribute("name")):
998
803
if_tag.appendChild(tag)
999
# Add annotation tags
1000
for typ in ("method", "signal", "property"):
1001
for tag in if_tag.getElementsByTagName(typ):
1002
annots = dict()
1003
for name, prop in (self.
1004
_get_all_dbus_things(typ)):
1005
if (name == tag.getAttribute("name")
1006
and prop._dbus_interface
1007
== if_tag.getAttribute("name")):
1008
annots.update(getattr
1009
(prop,
1010
"_dbus_annotations",
1011
{}))
1012
for name, value in annots.iteritems():
1013
ann_tag = document.createElement(
1014
"annotation")
1015
ann_tag.setAttribute("name", name)
1016
ann_tag.setAttribute("value", value)
1017
tag.appendChild(ann_tag)
1018
# Add interface annotation tags
1019
for annotation, value in dict(
1020
itertools.chain.from_iterable(
1021
annotations().iteritems()
1022
for name, annotations in
1023
self._get_all_dbus_things("interface")
1024
if name == if_tag.getAttribute("name")
1025
)).iteritems():
1026
ann_tag = document.createElement("annotation")
1027
ann_tag.setAttribute("name", annotation)
1028
ann_tag.setAttribute("value", value)
1029
if_tag.appendChild(ann_tag)
1030
804
# Add the names to the return values for the
1031
805
# "org.freedesktop.DBus.Properties" methods
1032
806
if (if_tag.getAttribute("name")
1047
821
except (AttributeError, xml.dom.DOMException,
1048
822
xml.parsers.expat.ExpatError) as error:
1049
823
logger.error("Failed to override Introspection method",
1050
exc_info=error)
824
error)
1051
825
return xmlstring
1052
826
1053
827
1054
def datetime_to_dbus(dt, variant_level=0):
828
def datetime_to_dbus (dt, variant_level=0):
1055
829
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1056
830
if dt is None:
1057
831
return dbus.String("", variant_level = variant_level)
1058
832
return dbus.String(dt.isoformat(),
1059
833
variant_level=variant_level)
1060
834
1061
1062
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1063
"""A class decorator; applied to a subclass of
1064
dbus.service.Object, it will add alternate D-Bus attributes with
1065
interface names according to the "alt_interface_names" mapping.
1066
Usage:
1067
1068
@alternate_dbus_interfaces({"org.example.Interface":
1069
"net.example.AlternateInterface"})
1070
class SampleDBusObject(dbus.service.Object):
1071
@dbus.service.method("org.example.Interface")
1072
def SampleDBusMethod():
1073
pass
1074
1075
The above "SampleDBusMethod" on "SampleDBusObject" will be
1076
reachable via two interfaces: "org.example.Interface" and
1077
"net.example.AlternateInterface", the latter of which will have
1078
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1079
"true", unless "deprecate" is passed with a False value.
1080
1081
This works for methods and signals, and also for D-Bus properties
1082
(from DBusObjectWithProperties) and interfaces (from the
1083
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.
1084
839
"""
1085
def wrapper(cls):
1086
for orig_interface_name, alt_interface_name in (
1087
alt_interface_names.iteritems()):
1088
attr = {}
1089
interface_names = set()
1090
# Go though all attributes of the class
1091
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):
1092
847
# Ignore non-D-Bus attributes, and D-Bus attributes
1093
848
# with the wrong interface name
1094
849
if (not hasattr(attribute, "_dbus_interface")
1095
850
or not attribute._dbus_interface
1096
.startswith(orig_interface_name)):
851
.startswith("se.recompile.Mandos")):
1097
852
continue
1098
853
# Create an alternate D-Bus interface name based on
1099
854
# the current name
1100
855
alt_interface = (attribute._dbus_interface
1101
.replace(orig_interface_name,
1102
alt_interface_name))
1103
interface_names.add(alt_interface)
856
.replace("se.recompile.Mandos",
857
"se.bsnet.fukt.Mandos"))
1104
858
# Is this a D-Bus signal?
1105
859
if getattr(attribute, "_dbus_is_signal", False):
1106
# Extract the original non-method undecorated
1107
# function by black magic
860
# Extract the original non-method function by
861
# black magic
1108
862
nonmethod_func = (dict(
1109
863
zip(attribute.func_code.co_freevars,
1110
864
attribute.__closure__))["func"]
1121
875
nonmethod_func.func_name,
1122
876
nonmethod_func.func_defaults,
1123
877
nonmethod_func.func_closure)))
1124
# Copy annotations, if any
1125
try:
1126
new_function._dbus_annotations = (
1127
dict(attribute._dbus_annotations))
1128
except AttributeError:
1129
pass
1130
878
# Define a creator of a function to call both the
1131
# original and alternate functions, so both the
1132
# original and alternate signals gets sent when
1133
# the function is called
879
# old and new functions, so both the old and new
880
# signals gets sent when the function is called
1134
881
def fixscope(func1, func2):
1135
882
"""This function is a scope container to pass
1136
883
func1 and func2 to the "call_both" function
1143
890
return call_both
1144
891
# Create the "call_both" function and add it to
1145
892
# the class
1146
attr[attrname] = fixscope(attribute, new_function)
893
attr[attrname] = fixscope(attribute,
894
new_function)
1147
895
# Is this a D-Bus method?
1148
896
elif getattr(attribute, "_dbus_is_method", False):
1149
897
# Create a new, but exactly alike, function
1160
908
attribute.func_name,
1161
909
attribute.func_defaults,
1162
910
attribute.func_closure)))
1163
# Copy annotations, if any
1164
try:
1165
attr[attrname]._dbus_annotations = (
1166
dict(attribute._dbus_annotations))
1167
except AttributeError:
1168
pass
1169
911
# Is this a D-Bus property?
1170
912
elif getattr(attribute, "_dbus_is_property", False):
1171
913
# Create a new, but exactly alike, function
1185
927
attribute.func_name,
1186
928
attribute.func_defaults,
1187
929
attribute.func_closure)))
1188
# Copy annotations, if any
1189
try:
1190
attr[attrname]._dbus_annotations = (
1191
dict(attribute._dbus_annotations))
1192
except AttributeError:
1193
pass
1194
# Is this a D-Bus interface?
1195
elif getattr(attribute, "_dbus_is_interface", False):
1196
# Create a new, but exactly alike, function
1197
# object. Decorate it to be a new D-Bus interface
1198
# with the alternate D-Bus interface name. Add it
1199
# to the class.
1200
attr[attrname] = (dbus_interface_annotations
1201
(alt_interface)
1202
(types.FunctionType
1203
(attribute.func_code,
1204
attribute.func_globals,
1205
attribute.func_name,
1206
attribute.func_defaults,
1207
attribute.func_closure)))
1208
if deprecate:
1209
# Deprecate all alternate interfaces
1210
iname="_AlternateDBusNames_interface_annotation{0}"
1211
for interface_name in interface_names:
1212
@dbus_interface_annotations(interface_name)
1213
def func(self):
1214
return { "org.freedesktop.DBus.Deprecated":
1215
"true" }
1216
# Find an unused name
1217
for aname in (iname.format(i)
1218
for i in itertools.count()):
1219
if aname not in attr:
1220
attr[aname] = func
1221
break
1222
if interface_names:
1223
# Replace the class with a new subclass of it with
1224
# methods, signals, etc. as created above.
1225
cls = type(b"{0}Alternate".format(cls.__name__),
1226
(cls,), attr)
1227
return cls
1228
return wrapper
1229
1230
1231
@alternate_dbus_interfaces({"se.recompile.Mandos":
1232
"se.bsnet.fukt.Mandos"})
930
return type.__new__(mcs, name, bases, attr)
931
1233
932
class ClientDBus(Client, DBusObjectWithProperties):
1234
933
"""A Client class using D-Bus
1235
934
1246
945
def __init__(self, bus = None, *args, **kwargs):
1247
946
self.bus = bus
1248
947
Client.__init__(self, *args, **kwargs)
948
949
self._approvals_pending = 0
1249
950
# Only now, when this client is initialized, can it show up on
1250
951
# the D-Bus
1251
952
client_object_name = unicode(self.name).translate(
1255
956
("/clients/" + client_object_name))
1256
957
DBusObjectWithProperties.__init__(self, self.bus,
1257
958
self.dbus_object_path)
1258
959
1259
960
def notifychangeproperty(transform_func,
1260
961
dbus_name, type_func=lambda x: x,
1261
962
variant_level=1):
1262
963
""" Modify a variable so that it's a property which announces
1263
964
its changes to DBus.
1264
965
1265
966
transform_fun: Function that takes a value and a variant_level
1266
967
and transforms it to a D-Bus type.
1267
968
dbus_name: D-Bus name of the variable
1284
985
1285
986
return property(lambda self: getattr(self, attrname), setter)
1286
987
988
1287
989
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1288
990
approvals_pending = notifychangeproperty(dbus.Boolean,
1289
991
"ApprovalPending",
1296
998
checker is not None)
1297
999
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1298
1000
"LastCheckedOK")
1299
last_checker_status = notifychangeproperty(dbus.Int16,
1300
"LastCheckerStatus")
1301
1001
last_approval_request = notifychangeproperty(
1302
1002
datetime_to_dbus, "LastApprovalRequest")
1303
1003
approved_by_default = notifychangeproperty(dbus.Boolean,
1304
1004
"ApprovedByDefault")
1305
approval_delay = notifychangeproperty(dbus.UInt64,
1005
approval_delay = notifychangeproperty(dbus.UInt16,
1306
1006
"ApprovalDelay",
1307
1007
type_func =
1308
timedelta_to_milliseconds)
1008
_timedelta_to_milliseconds)
1309
1009
approval_duration = notifychangeproperty(
1310
dbus.UInt64, "ApprovalDuration",
1311
type_func = timedelta_to_milliseconds)
1010
dbus.UInt16, "ApprovalDuration",
1011
type_func = _timedelta_to_milliseconds)
1312
1012
host = notifychangeproperty(dbus.String, "Host")
1313
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1013
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1314
1014
type_func =
1315
timedelta_to_milliseconds)
1015
_timedelta_to_milliseconds)
1316
1016
extended_timeout = notifychangeproperty(
1317
dbus.UInt64, "ExtendedTimeout",
1318
type_func = timedelta_to_milliseconds)
1319
interval = notifychangeproperty(dbus.UInt64,
1017
dbus.UInt16, "ExtendedTimeout",
1018
type_func = _timedelta_to_milliseconds)
1019
interval = notifychangeproperty(dbus.UInt16,
1320
1020
"Interval",
1321
1021
type_func =
1322
timedelta_to_milliseconds)
1022
_timedelta_to_milliseconds)
1323
1023
checker_command = notifychangeproperty(dbus.String, "Checker")
1324
1024
1325
1025
del notifychangeproperty
1353
1053
*args, **kwargs)
1354
1054
1355
1055
def start_checker(self, *args, **kwargs):
1356
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
1357
1061
r = Client.start_checker(self, *args, **kwargs)
1358
1062
# Only if new checker process was started
1359
1063
if (self.checker is not None
1363
1067
return r
1364
1068
1365
1069
def _reset_approved(self):
1366
self.approved = None
1070
self._approved = None
1367
1071
return False
1368
1072
1369
1073
def approve(self, value=True):
1370
self.approved = value
1371
gobject.timeout_add(timedelta_to_milliseconds
1074
self.send_changedstate()
1075
self._approved = value
1076
gobject.timeout_add(_timedelta_to_milliseconds
1372
1077
(self.approval_duration),
1373
1078
self._reset_approved)
1374
self.send_changedstate()
1079
1375
1080
1376
1081
## D-Bus methods, signals & properties
1377
1082
_interface = "se.recompile.Mandos.Client"
1378
1083
1379
## Interfaces
1380
1381
@dbus_interface_annotations(_interface)
1382
def _foo(self):
1383
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1384
"false"}
1385
1386
1084
## Signals
1387
1085
1388
1086
# CheckerCompleted - signal
1487
1185
access="readwrite")
1488
1186
def ApprovalDuration_dbus_property(self, value=None):
1489
1187
if value is None: # get
1490
return dbus.UInt64(timedelta_to_milliseconds(
1188
return dbus.UInt64(_timedelta_to_milliseconds(
1491
1189
self.approval_duration))
1492
1190
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1493
1191
1507
1205
def Host_dbus_property(self, value=None):
1508
1206
if value is None: # get
1509
1207
return dbus.String(self.host)
1510
self.host = unicode(value)
1208
self.host = value
1511
1209
1512
1210
# Created - property
1513
1211
@dbus_service_property(_interface, signature="s", access="read")
1514
1212
def Created_dbus_property(self):
1515
return datetime_to_dbus(self.created)
1213
return dbus.String(datetime_to_dbus(self.created))
1516
1214
1517
1215
# LastEnabled - property
1518
1216
@dbus_service_property(_interface, signature="s", access="read")
1539
1237
return
1540
1238
return datetime_to_dbus(self.last_checked_ok)
1541
1239
1542
# LastCheckerStatus - property
1543
@dbus_service_property(_interface, signature="n",
1544
access="read")
1545
def LastCheckerStatus_dbus_property(self):
1546
return dbus.Int16(self.last_checker_status)
1547
1548
1240
# Expires - property
1549
1241
@dbus_service_property(_interface, signature="s", access="read")
1550
1242
def Expires_dbus_property(self):
1561
1253
def Timeout_dbus_property(self, value=None):
1562
1254
if value is None: # get
1563
1255
return dbus.UInt64(self.timeout_milliseconds())
1564
old_timeout = self.timeout
1565
1256
self.timeout = datetime.timedelta(0, 0, 0, value)
1566
# Reschedule disabling
1567
if self.enabled:
1568
now = datetime.datetime.utcnow()
1569
self.expires += self.timeout - old_timeout
1570
if self.expires <= now:
1571
# The timeout has passed
1572
self.disable()
1573
else:
1574
if (getattr(self, "disable_initiator_tag", None)
1575
is None):
1576
return
1577
gobject.source_remove(self.disable_initiator_tag)
1578
self.disable_initiator_tag = (
1579
gobject.timeout_add(
1580
timedelta_to_milliseconds(self.expires - now),
1581
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))
1582
1277
1583
1278
# ExtendedTimeout - property
1584
1279
@dbus_service_property(_interface, signature="t",
1597
1292
self.interval = datetime.timedelta(0, 0, 0, value)
1598
1293
if getattr(self, "checker_initiator_tag", None) is None:
1599
1294
return
1600
if self.enabled:
1601
# Reschedule checker run
1602
gobject.source_remove(self.checker_initiator_tag)
1603
self.checker_initiator_tag = (gobject.timeout_add
1604
(value, self.start_checker))
1605
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
1606
1300
1607
1301
# Checker - property
1608
1302
@dbus_service_property(_interface, signature="s",
1610
1304
def Checker_dbus_property(self, value=None):
1611
1305
if value is None: # get
1612
1306
return dbus.String(self.checker_command)
1613
self.checker_command = unicode(value)
1307
self.checker_command = value
1614
1308
1615
1309
# CheckerRunning - property
1616
1310
@dbus_service_property(_interface, signature="b",
1645
1339
raise KeyError()
1646
1340
1647
1341
def __getattribute__(self, name):
1648
if name == '_pipe':
1342
if(name == '_pipe'):
1649
1343
return super(ProxyClient, self).__getattribute__(name)
1650
1344
self._pipe.send(('getattr', name))
1651
1345
data = self._pipe.recv()
1658
1352
return func
1659
1353
1660
1354
def __setattr__(self, name, value):
1661
if name == '_pipe':
1355
if(name == '_pipe'):
1662
1356
return super(ProxyClient, self).__setattr__(name, value)
1663
1357
self._pipe.send(('setattr', name, value))
1664
1358
1359
class ClientDBusTransitional(ClientDBus):
1360
__metaclass__ = AlternateDBusNamesMetaclass
1665
1361
1666
1362
class ClientHandler(socketserver.BaseRequestHandler, object):
1667
1363
"""A class to handle client connections.
1704
1400
logger.debug("Protocol version: %r", line)
1705
1401
try:
1706
1402
if int(line.strip().split()[0]) > 1:
1707
raise RuntimeError(line)
1403
raise RuntimeError
1708
1404
except (ValueError, IndexError, RuntimeError) as error:
1709
1405
logger.error("Unknown protocol version: %s", error)
1710
1406
return
1750
1446
client.Rejected("Disabled")
1751
1447
return
1752
1448
1753
if client.approved or not client.approval_delay:
1449
if client._approved or not client.approval_delay:
1754
1450
#We are approved or approval is disabled
1755
1451
break
1756
elif client.approved is None:
1452
elif client._approved is None:
1757
1453
logger.info("Client %s needs approval",
1758
1454
client.name)
1759
1455
if self.server.use_dbus:
1772
1468
#wait until timeout or approved
1773
1469
time = datetime.datetime.now()
1774
1470
client.changedstate.acquire()
1775
client.changedstate.wait(
1776
float(timedelta_to_milliseconds(delay)
1777
/ 1000))
1471
(client.changedstate.wait
1472
(float(client._timedelta_to_milliseconds(delay)
1473
/ 1000)))
1778
1474
client.changedstate.release()
1779
1475
time2 = datetime.datetime.now()
1780
1476
if (time2 - time) >= delay:
1796
1492
try:
1797
1493
sent = session.send(client.secret[sent_size:])
1798
1494
except gnutls.errors.GNUTLSError as error:
1799
logger.warning("gnutls send failed",
1800
exc_info=error)
1495
logger.warning("gnutls send failed")
1801
1496
return
1802
1497
logger.debug("Sent: %d, remaining: %d",
1803
1498
sent, len(client.secret)
1806
1501
1807
1502
logger.info("Sending secret to %s", client.name)
1808
1503
# bump the timeout using extended_timeout
1809
client.bump_timeout(client.extended_timeout)
1504
client.checked_ok(client.extended_timeout)
1810
1505
if self.server.use_dbus:
1811
1506
# Emit D-Bus signal
1812
1507
client.GotSecret()
1817
1512
try:
1818
1513
session.bye()
1819
1514
except gnutls.errors.GNUTLSError as error:
1820
logger.warning("GnuTLS bye failed",
1821
exc_info=error)
1515
logger.warning("GnuTLS bye failed")
1822
1516
1823
1517
@staticmethod
1824
1518
def peer_certificate(session):
1880
1574
# Convert the buffer to a Python bytestring
1881
1575
fpr = ctypes.string_at(buf, buf_len.value)
1882
1576
# Convert the bytestring to hexadecimal notation
1883
hex_fpr = binascii.hexlify(fpr).upper()
1577
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1884
1578
return hex_fpr
1885
1579
1886
1580
1889
1583
def sub_process_main(self, request, address):
1890
1584
try:
1891
1585
self.finish_request(request, address)
1892
except Exception:
1586
except:
1893
1587
self.handle_error(request, address)
1894
1588
self.close_request(request)
1895
1589
1896
1590
def process_request(self, request, address):
1897
1591
"""Start a new process to process the request."""
1898
1592
proc = multiprocessing.Process(target = self.sub_process_main,
1899
args = (request, address))
1593
args = (request,
1594
address))
1900
1595
proc.start()
1901
1596
return proc
1902
1597
1917
1612
1918
1613
def add_pipe(self, parent_pipe, proc):
1919
1614
"""Dummy function; override as necessary"""
1920
raise NotImplementedError()
1615
raise NotImplementedError
1921
1616
1922
1617
1923
1618
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1930
1625
use_ipv6: Boolean; to use IPv6 or not
1931
1626
"""
1932
1627
def __init__(self, server_address, RequestHandlerClass,
1933
interface=None, use_ipv6=True, socketfd=None):
1934
"""If socketfd is set, use that file descriptor instead of
1935
creating a new one with socket.socket().
1936
"""
1628
interface=None, use_ipv6=True):
1937
1629
self.interface = interface
1938
1630
if use_ipv6:
1939
1631
self.address_family = socket.AF_INET6
1940
if socketfd is not None:
1941
# Save the file descriptor
1942
self.socketfd = socketfd
1943
# Save the original socket.socket() function
1944
self.socket_socket = socket.socket
1945
# To implement --socket, we monkey patch socket.socket.
1946
#
1947
# (When socketserver.TCPServer is a new-style class, we
1948
# could make self.socket into a property instead of monkey
1949
# patching socket.socket.)
1950
#
1951
# Create a one-time-only replacement for socket.socket()
1952
@functools.wraps(socket.socket)
1953
def socket_wrapper(*args, **kwargs):
1954
# Restore original function so subsequent calls are
1955
# not affected.
1956
socket.socket = self.socket_socket
1957
del self.socket_socket
1958
# This time only, return a new socket object from the
1959
# saved file descriptor.
1960
return socket.fromfd(self.socketfd, *args, **kwargs)
1961
# Replace socket.socket() function with wrapper
1962
socket.socket = socket_wrapper
1963
# The socketserver.TCPServer.__init__ will call
1964
# socket.socket(), which might be our replacement,
1965
# socket_wrapper(), if socketfd was set.
1966
1632
socketserver.TCPServer.__init__(self, server_address,
1967
1633
RequestHandlerClass)
1968
1969
1634
def server_bind(self):
1970
1635
"""This overrides the normal server_bind() function
1971
1636
to bind to an interface if one was specified, and also NOT to
1979
1644
try:
1980
1645
self.socket.setsockopt(socket.SOL_SOCKET,
1981
1646
SO_BINDTODEVICE,
1982
str(self.interface + '\0'))
1647
str(self.interface
1648
+ '\0'))
1983
1649
except socket.error as error:
1984
if error.errno == errno.EPERM:
1985
logger.error("No permission to bind to"
1986
" interface %s", self.interface)
1987
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:
1988
1655
logger.error("SO_BINDTODEVICE not available;"
1989
1656
" cannot bind to interface %s",
1990
1657
self.interface)
1991
elif error.errno == errno.ENODEV:
1992
logger.error("Interface %s does not exist,"
1993
" cannot bind", self.interface)
1994
1658
else:
1995
1659
raise
1996
1660
# Only bind(2) the socket if we really need to.
1999
1663
if self.address_family == socket.AF_INET6:
2000
1664
any_address = "::" # in6addr_any
2001
1665
else:
2002
any_address = "0.0.0.0" # INADDR_ANY
1666
any_address = socket.INADDR_ANY
2003
1667
self.server_address = (any_address,
2004
1668
self.server_address[1])
2005
1669
elif not self.server_address[1]:
2026
1690
"""
2027
1691
def __init__(self, server_address, RequestHandlerClass,
2028
1692
interface=None, use_ipv6=True, clients=None,
2029
gnutls_priority=None, use_dbus=True, socketfd=None):
1693
gnutls_priority=None, use_dbus=True):
2030
1694
self.enabled = False
2031
1695
self.clients = clients
2032
1696
if self.clients is None:
2036
1700
IPv6_TCPServer.__init__(self, server_address,
2037
1701
RequestHandlerClass,
2038
1702
interface = interface,
2039
use_ipv6 = use_ipv6,
2040
socketfd = socketfd)
1703
use_ipv6 = use_ipv6)
2041
1704
def server_activate(self):
2042
1705
if self.enabled:
2043
1706
return socketserver.TCPServer.server_activate(self)
2056
1719
2057
1720
def handle_ipc(self, source, condition, parent_pipe=None,
2058
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)
2059
1736
# error, or the other end of multiprocessing.Pipe has closed
2060
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1737
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2061
1738
# Wait for other process to exit
2062
1739
proc.join()
2063
1740
return False
2121
1798
return True
2122
1799
2123
1800
2124
def rfc3339_duration_to_delta(duration):
2125
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2126
2127
>>> rfc3339_duration_to_delta("P7D")
2128
datetime.timedelta(7)
2129
>>> rfc3339_duration_to_delta("PT60S")
2130
datetime.timedelta(0, 60)
2131
>>> rfc3339_duration_to_delta("PT60M")
2132
datetime.timedelta(0, 3600)
2133
>>> rfc3339_duration_to_delta("PT24H")
2134
datetime.timedelta(1)
2135
>>> rfc3339_duration_to_delta("P1W")
2136
datetime.timedelta(7)
2137
>>> rfc3339_duration_to_delta("PT5M30S")
2138
datetime.timedelta(0, 330)
2139
>>> rfc3339_duration_to_delta("P1DT3M20S")
2140
datetime.timedelta(1, 200)
2141
"""
2142
2143
# Parsing an RFC 3339 duration with regular expressions is not
2144
# possible - there would have to be multiple places for the same
2145
# values, like seconds. The current code, while more esoteric, is
2146
# cleaner without depending on a parsing library. If Python had a
2147
# built-in library for parsing we would use it, but we'd like to
2148
# avoid excessive use of external libraries.
2149
2150
# New type for defining tokens, syntax, and semantics all-in-one
2151
Token = collections.namedtuple("Token",
2152
("regexp", # To match token; if
2153
# "value" is not None,
2154
# must have a "group"
2155
# containing digits
2156
"value", # datetime.timedelta or
2157
# None
2158
"followers")) # Tokens valid after
2159
# this token
2160
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2161
# the "duration" ABNF definition in RFC 3339, Appendix A.
2162
token_end = Token(re.compile(r"$"), None, frozenset())
2163
token_second = Token(re.compile(r"(\d+)S"),
2164
datetime.timedelta(seconds=1),
2165
frozenset((token_end,)))
2166
token_minute = Token(re.compile(r"(\d+)M"),
2167
datetime.timedelta(minutes=1),
2168
frozenset((token_second, token_end)))
2169
token_hour = Token(re.compile(r"(\d+)H"),
2170
datetime.timedelta(hours=1),
2171
frozenset((token_minute, token_end)))
2172
token_time = Token(re.compile(r"T"),
2173
None,
2174
frozenset((token_hour, token_minute,
2175
token_second)))
2176
token_day = Token(re.compile(r"(\d+)D"),
2177
datetime.timedelta(days=1),
2178
frozenset((token_time, token_end)))
2179
token_month = Token(re.compile(r"(\d+)M"),
2180
datetime.timedelta(weeks=4),
2181
frozenset((token_day, token_end)))
2182
token_year = Token(re.compile(r"(\d+)Y"),
2183
datetime.timedelta(weeks=52),
2184
frozenset((token_month, token_end)))
2185
token_week = Token(re.compile(r"(\d+)W"),
2186
datetime.timedelta(weeks=1),
2187
frozenset((token_end,)))
2188
token_duration = Token(re.compile(r"P"), None,
2189
frozenset((token_year, token_month,
2190
token_day, token_time,
2191
token_week))),
2192
# Define starting values
2193
value = datetime.timedelta() # Value so far
2194
found_token = None
2195
followers = frozenset(token_duration,) # Following valid tokens
2196
s = duration # String left to parse
2197
# Loop until end token is found
2198
while found_token is not token_end:
2199
# Search for any currently valid tokens
2200
for token in followers:
2201
match = token.regexp.match(s)
2202
if match is not None:
2203
# Token found
2204
if token.value is not None:
2205
# Value found, parse digits
2206
factor = int(match.group(1), 10)
2207
# Add to value so far
2208
value += factor * token.value
2209
# Strip token from string
2210
s = token.regexp.sub("", s, 1)
2211
# Go to found token
2212
found_token = token
2213
# Set valid next tokens
2214
followers = found_token.followers
2215
break
2216
else:
2217
# No currently valid tokens were found
2218
raise ValueError("Invalid RFC 3339 duration")
2219
# End token found
2220
return value
2221
2222
2223
1801
def string_to_delta(interval):
2224
1802
"""Parse a string and return a datetime.timedelta
2225
1803
2236
1814
>>> string_to_delta('5m 30s')
2237
1815
datetime.timedelta(0, 330)
2238
1816
"""
2239
2240
try:
2241
return rfc3339_duration_to_delta(interval)
2242
except ValueError:
2243
pass
2244
2245
1817
timevalue = datetime.timedelta(0)
2246
1818
for s in interval.split():
2247
1819
try:
2258
1830
elif suffix == "w":
2259
1831
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2260
1832
else:
2261
raise ValueError("Unknown suffix {0!r}"
2262
.format(suffix))
2263
except IndexError as e:
1833
raise ValueError("Unknown suffix %r" % suffix)
1834
except (ValueError, IndexError) as e:
2264
1835
raise ValueError(*(e.args))
2265
1836
timevalue += delta
2266
1837
return timevalue
2267
1838
2268
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
2269
1864
def daemon(nochdir = False, noclose = False):
2270
1865
"""See daemon(3). Standard BSD Unix function.
2271
1866
2279
1874
sys.exit()
2280
1875
if not noclose:
2281
1876
# Close all standard open file descriptors
2282
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1877
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2283
1878
if not stat.S_ISCHR(os.fstat(null).st_mode):
2284
1879
raise OSError(errno.ENODEV,
2285
"{0} not a character device"
2286
.format(os.devnull))
1880
"%s not a character device"
1881
% os.path.devnull)
2287
1882
os.dup2(null, sys.stdin.fileno())
2288
1883
os.dup2(null, sys.stdout.fileno())
2289
1884
os.dup2(null, sys.stderr.fileno())
2298
1893
2299
1894
parser = argparse.ArgumentParser()
2300
1895
parser.add_argument("-v", "--version", action="version",
2301
version = "%(prog)s {0}".format(version),
1896
version = "%%(prog)s %s" % version,
2302
1897
help="show version number and exit")
2303
1898
parser.add_argument("-i", "--interface", metavar="IF",
2304
1899
help="Bind to interface IF")
2310
1905
help="Run self-test")
2311
1906
parser.add_argument("--debug", action="store_true",
2312
1907
help="Debug mode; run in foreground and log"
2313
" to terminal", default=None)
1908
" to terminal")
2314
1909
parser.add_argument("--debuglevel", metavar="LEVEL",
2315
1910
help="Debug level for stdout output")
2316
1911
parser.add_argument("--priority", help="GnuTLS"
2323
1918
" files")
2324
1919
parser.add_argument("--no-dbus", action="store_false",
2325
1920
dest="use_dbus", help="Do not provide D-Bus"
2326
" system bus interface", default=None)
1921
" system bus interface")
2327
1922
parser.add_argument("--no-ipv6", action="store_false",
2328
dest="use_ipv6", help="Do not use IPv6",
2329
default=None)
1923
dest="use_ipv6", help="Do not use IPv6")
2330
1924
parser.add_argument("--no-restore", action="store_false",
2331
dest="restore", help="Do not restore stored"
2332
" state", default=None)
2333
parser.add_argument("--socket", type=int,
2334
help="Specify a file descriptor to a network"
2335
" socket to use instead of creating one")
2336
parser.add_argument("--statedir", metavar="DIR",
2337
help="Directory to save/restore state in")
2338
parser.add_argument("--foreground", action="store_true",
2339
help="Run in foreground", default=None)
2340
1925
dest="restore", help="Do not restore stored state",
1926
default=True)
1927
2341
1928
options = parser.parse_args()
2342
1929
2343
1930
if options.check:
2344
1931
import doctest
2345
fail_count, test_count = doctest.testmod()
2346
sys.exit(os.EX_OK if fail_count == 0 else 1)
1932
doctest.testmod()
1933
sys.exit()
2347
1934
2348
1935
# Default values for config file for server-global settings
2349
1936
server_defaults = { "interface": "",
2351
1938
"port": "",
2352
1939
"debug": "False",
2353
1940
"priority":
2354
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1941
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2355
1942
"servicename": "Mandos",
2356
1943
"use_dbus": "True",
2357
1944
"use_ipv6": "True",
2358
1945
"debuglevel": "",
2359
"restore": "True",
2360
"socket": "",
2361
"statedir": "/var/lib/mandos",
2362
"foreground": "False",
2363
1946
}
2364
1947
2365
1948
# Parse config file for server-global settings
2370
1953
# Convert the SafeConfigParser object to a dict
2371
1954
server_settings = server_config.defaults()
2372
1955
# Use the appropriate methods on the non-string config options
2373
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1956
for option in ("debug", "use_dbus", "use_ipv6"):
2374
1957
server_settings[option] = server_config.getboolean("DEFAULT",
2375
1958
option)
2376
1959
if server_settings["port"]:
2377
1960
server_settings["port"] = server_config.getint("DEFAULT",
2378
1961
"port")
2379
if server_settings["socket"]:
2380
server_settings["socket"] = server_config.getint("DEFAULT",
2381
"socket")
2382
# Later, stdin will, and stdout and stderr might, be dup'ed
2383
# over with an opened os.devnull. But we don't want this to
2384
# happen with a supplied network socket.
2385
if 0 <= server_settings["socket"] <= 2:
2386
server_settings["socket"] = os.dup(server_settings
2387
["socket"])
2388
1962
del server_config
2389
1963
2390
1964
# Override the settings from the config file with command line
2391
1965
# options, if set.
2392
1966
for option in ("interface", "address", "port", "debug",
2393
1967
"priority", "servicename", "configdir",
2394
"use_dbus", "use_ipv6", "debuglevel", "restore",
2395
"statedir", "socket", "foreground"):
1968
"use_dbus", "use_ipv6", "debuglevel", "restore"):
2396
1969
value = getattr(options, option)
2397
1970
if value is not None:
2398
1971
server_settings[option] = value
2401
1974
for option in server_settings.keys():
2402
1975
if type(server_settings[option]) is str:
2403
1976
server_settings[option] = unicode(server_settings[option])
2404
# Force all boolean options to be boolean
2405
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2406
"foreground"):
2407
server_settings[option] = bool(server_settings[option])
2408
# Debug implies foreground
2409
if server_settings["debug"]:
2410
server_settings["foreground"] = True
2411
1977
# Now we have our good server settings in "server_settings"
2412
1978
2413
1979
##################################################################
2417
1983
debuglevel = server_settings["debuglevel"]
2418
1984
use_dbus = server_settings["use_dbus"]
2419
1985
use_ipv6 = server_settings["use_ipv6"]
2420
stored_state_path = os.path.join(server_settings["statedir"],
2421
stored_state_file)
2422
foreground = server_settings["foreground"]
2423
2424
if debug:
2425
initlogger(debug, logging.DEBUG)
2426
else:
2427
if not debuglevel:
2428
initlogger(debug)
2429
else:
2430
level = getattr(logging, debuglevel.upper())
2431
initlogger(debug, level)
2432
1986
2433
1987
if server_settings["servicename"] != "Mandos":
2434
1988
syslogger.setFormatter(logging.Formatter
2435
('Mandos ({0}) [%(process)d]:'
2436
' %(levelname)s: %(message)s'
2437
.format(server_settings
2438
["servicename"])))
1989
('Mandos (%s) [%%(process)d]:'
1990
' %%(levelname)s: %%(message)s'
1991
% server_settings["servicename"]))
2439
1992
2440
1993
# Parse config file with clients
2441
client_config = configparser.SafeConfigParser(Client
2442
.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)
2443
2003
client_config.read(os.path.join(server_settings["configdir"],
2444
2004
"clients.conf"))
2445
2005
2454
2014
use_ipv6=use_ipv6,
2455
2015
gnutls_priority=
2456
2016
server_settings["priority"],
2457
use_dbus=use_dbus,
2458
socketfd=(server_settings["socket"]
2459
or None))
2460
if not foreground:
2461
pidfilename = "/run/mandos.pid"
2462
if not os.path.isdir("/run/."):
2463
pidfilename = "/var/run/mandos.pid"
2464
pidfile = None
2017
use_dbus=use_dbus)
2018
if not debug:
2019
pidfilename = "/var/run/mandos.pid"
2465
2020
try:
2466
2021
pidfile = open(pidfilename, "w")
2467
except IOError as e:
2468
logger.error("Could not open file %r", pidfilename,
2469
exc_info=e)
2022
except IOError:
2023
logger.error("Could not open file %r", pidfilename)
2470
2024
2471
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:
2472
2029
try:
2473
uid = pwd.getpwnam(name).pw_uid
2474
gid = pwd.getpwnam(name).pw_gid
2475
break
2030
uid = pwd.getpwnam("mandos").pw_uid
2031
gid = pwd.getpwnam("mandos").pw_gid
2476
2032
except KeyError:
2477
continue
2478
else:
2479
uid = 65534
2480
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
2481
2039
try:
2482
2040
os.setgid(gid)
2483
2041
os.setuid(uid)
2484
2042
except OSError as error:
2485
if error.errno != errno.EPERM:
2486
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)
2487
2051
2488
2052
if debug:
2053
logger.setLevel(logging.DEBUG)
2489
2054
# Enable all possible GnuTLS debugging
2490
2055
2491
2056
# "Use a log level over 10 to enable all debugging options."
2500
2065
.gnutls_global_set_log_function(debug_gnutls))
2501
2066
2502
2067
# Redirect stdin so all checkers get /dev/null
2503
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2068
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2504
2069
os.dup2(null, sys.stdin.fileno())
2505
2070
if null > 2:
2506
2071
os.close(null)
2072
else:
2073
# No console logging
2074
logger.removeHandler(console)
2507
2075
2508
2076
# Need to fork before connecting to D-Bus
2509
if not foreground:
2077
if not debug:
2510
2078
# Close all input and output, do double fork, etc.
2511
2079
daemon()
2512
2080
2513
# multiprocessing will use threads, so before we use gobject we
2514
# need to inform gobject that threads will be used.
2515
gobject.threads_init()
2516
2517
2081
global main_loop
2518
2082
# From the Avahi example code
2519
DBusGMainLoop(set_as_default=True)
2083
DBusGMainLoop(set_as_default=True )
2520
2084
main_loop = gobject.MainLoop()
2521
2085
bus = dbus.SystemBus()
2522
2086
# End of Avahi example code
2528
2092
("se.bsnet.fukt.Mandos", bus,
2529
2093
do_not_queue=True))
2530
2094
except dbus.exceptions.NameExistsException as e:
2531
logger.error("Disabling D-Bus:", exc_info=e)
2095
logger.error(unicode(e) + ", disabling D-Bus")
2532
2096
use_dbus = False
2533
2097
server_settings["use_dbus"] = False
2534
2098
tcp_server.use_dbus = False
2546
2110
2547
2111
client_class = Client
2548
2112
if use_dbus:
2549
client_class = functools.partial(ClientDBus, bus = bus)
2550
2551
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
2552
2133
old_client_settings = {}
2553
clients_data = {}
2554
2555
# This is used to redirect stdout and stderr for checker processes
2556
global wnull
2557
wnull = open(os.devnull, "w") # A writable /dev/null
2558
# Only used if server is running in foreground but not in debug
2559
# mode
2560
if debug or not foreground:
2561
wnull.close()
2562
2563
# Get client data and settings from last running state.
2134
clients_data = []
2135
2136
# Get client data and settings from last running state.
2564
2137
if server_settings["restore"]:
2565
2138
try:
2566
2139
with open(stored_state_path, "rb") as stored_state:
2567
clients_data, old_client_settings = (pickle.load
2568
(stored_state))
2140
clients_data, old_client_settings = pickle.load(stored_state)
2569
2141
os.remove(stored_state_path)
2570
2142
except IOError as e:
2571
if e.errno == errno.ENOENT:
2572
logger.warning("Could not load persistent state: {0}"
2573
.format(os.strerror(e.errno)))
2574
else:
2575
logger.critical("Could not load persistent state:",
2576
exc_info=e)
2143
logger.warning("Could not load persistant state: {0}".format(e))
2144
if e.errno != errno.ENOENT:
2577
2145
raise
2578
except EOFError as e:
2579
logger.warning("Could not load persistent state: "
2580
"EOFError:", exc_info=e)
2581
2582
with PGPEngine() as pgp:
2583
for client_name, client in clients_data.iteritems():
2584
# Skip removed clients
2585
if client_name not in client_settings:
2586
continue
2587
2588
# Decide which value to use after restoring saved state.
2589
# We have three different values: Old config file,
2590
# new config file, and saved state.
2591
# New config value takes precedence if it differs from old
2592
# config value, otherwise use saved state.
2593
for name, value in client_settings[client_name].items():
2594
try:
2595
# For each value in new config, check if it
2596
# differs from the old config value (Except for
2597
# the "secret" attribute)
2598
if (name != "secret" and
2599
value != old_client_settings[client_name]
2600
[name]):
2601
client[name] = value
2602
except KeyError:
2603
pass
2604
2605
# Clients who has passed its expire date can still be
2606
# enabled if its last checker was successful. Clients
2607
# whose checker succeeded before we stored its state is
2608
# assumed to have successfully run all checkers during
2609
# downtime.
2610
if client["enabled"]:
2611
if datetime.datetime.utcnow() >= client["expires"]:
2612
if not client["last_checked_ok"]:
2613
logger.warning(
2614
"disabling client {0} - Client never "
2615
"performed a successful checker"
2616
.format(client_name))
2617
client["enabled"] = False
2618
elif client["last_checker_status"] != 0:
2619
logger.warning(
2620
"disabling client {0} - Client "
2621
"last checker failed with error code {1}"
2622
.format(client_name,
2623
client["last_checker_status"]))
2624
client["enabled"] = False
2625
else:
2626
client["expires"] = (datetime.datetime
2627
.utcnow()
2628
+ client["timeout"])
2629
logger.debug("Last checker succeeded,"
2630
" keeping {0} enabled"
2631
.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():
2632
2156
try:
2633
client["secret"] = (
2634
pgp.decrypt(client["encrypted_secret"],
2635
client_settings[client_name]
2636
["secret"]))
2637
except PGPError:
2638
# If decryption fails, we use secret from new settings
2639
logger.debug("Failed to decrypt {0} old secret"
2640
.format(client_name))
2641
client["secret"] = (
2642
client_settings[client_name]["secret"])
2643
2644
# Add/remove clients based on new changes made to config
2645
for client_name in (set(old_client_settings)
2646
- set(client_settings)):
2647
del clients_data[client_name]
2648
for client_name in (set(client_settings)
2649
- set(old_client_settings)):
2650
clients_data[client_name] = client_settings[client_name]
2651
2652
# Create all client objects
2653
for client_name, client in clients_data.iteritems():
2654
tcp_server.clients[client_name] = client_class(
2655
name = client_name, settings = client,
2656
server_settings = server_settings)
2657
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
2658
2211
if not tcp_server.clients:
2659
2212
logger.warning("No clients defined")
2660
2661
if not foreground:
2662
if pidfile is not None:
2663
try:
2664
with pidfile:
2665
pid = os.getpid()
2666
pidfile.write(str(pid) + "\n".encode("utf-8"))
2667
except IOError:
2668
logger.error("Could not write to file %r with PID %d",
2669
pidfilename, pid)
2670
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
2671
2226
del pidfilename
2227
2228
signal.signal(signal.SIGINT, signal.SIG_IGN)
2672
2229
2673
2230
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2674
2231
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2675
2232
2676
2233
if use_dbus:
2677
@alternate_dbus_interfaces({"se.recompile.Mandos":
2678
"se.bsnet.fukt.Mandos"})
2679
class MandosDBusService(DBusObjectWithProperties):
2234
class MandosDBusService(dbus.service.Object):
2680
2235
"""A D-Bus proxy object"""
2681
2236
def __init__(self):
2682
2237
dbus.service.Object.__init__(self, bus, "/")
2683
2238
_interface = "se.recompile.Mandos"
2684
2239
2685
@dbus_interface_annotations(_interface)
2686
def _foo(self):
2687
return { "org.freedesktop.DBus.Property"
2688
".EmitsChangedSignal":
2689
"false"}
2690
2691
2240
@dbus.service.signal(_interface, signature="o")
2692
2241
def ClientAdded(self, objpath):
2693
2242
"D-Bus signal"
2735
2284
2736
2285
del _interface
2737
2286
2738
mandos_dbus_service = MandosDBusService()
2287
class MandosDBusServiceTransitional(MandosDBusService):
2288
__metaclass__ = AlternateDBusNamesMetaclass
2289
mandos_dbus_service = MandosDBusServiceTransitional()
2739
2290
2740
2291
def cleanup():
2741
2292
"Cleanup function; run on exit"
2742
2293
service.cleanup()
2743
2294
2744
2295
multiprocessing.active_children()
2745
wnull.close()
2746
2296
if not (tcp_server.clients or client_settings):
2747
2297
return
2748
2749
# Store client before exiting. Secrets are encrypted with key
2750
# based on what config file has. If config file is
2751
# removed/edited, old secret will thus be unrecovable.
2752
clients = {}
2753
with PGPEngine() as pgp:
2754
for client in tcp_server.clients.itervalues():
2755
key = client_settings[client.name]["secret"]
2756
client.encrypted_secret = pgp.encrypt(client.secret,
2757
key)
2758
client_dict = {}
2759
2760
# A list of attributes that can not be pickled
2761
# + secret.
2762
exclude = set(("bus", "changedstate", "secret",
2763
"checker", "server_settings"))
2764
for name, typ in (inspect.getmembers
2765
(dbus.service.Object)):
2766
exclude.add(name)
2767
2768
client_dict["encrypted_secret"] = (client
2769
.encrypted_secret)
2770
for attr in client.client_structure:
2771
if attr not in exclude:
2772
client_dict[attr] = getattr(client, attr)
2773
2774
clients[client.name] = client_dict
2775
del client_settings[client.name]["secret"]
2776
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
2777
2321
try:
2778
with (tempfile.NamedTemporaryFile
2779
(mode='wb', suffix=".pickle", prefix='clients-',
2780
dir=os.path.dirname(stored_state_path),
2781
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:
2782
2323
pickle.dump((clients, client_settings), stored_state)
2783
tempname=stored_state.name
2784
os.rename(tempname, stored_state_path)
2785
except (IOError, OSError) as e:
2786
if not debug:
2787
try:
2788
os.remove(tempname)
2789
except NameError:
2790
pass
2791
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2792
logger.warning("Could not save persistent state: {0}"
2793
.format(os.strerror(e.errno)))
2794
else:
2795
logger.warning("Could not save persistent state:",
2796
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:
2797
2327
raise
2798
2328
2799
2329
# Delete all clients, and settings from config
2800
2330
while tcp_server.clients:
2801
2331
name, client = tcp_server.clients.popitem()
2819
2349
# Need to initiate checking of clients
2820
2350
if client.enabled:
2821
2351
client.init_checker()
2352
2822
2353
2823
2354
tcp_server.enable()
2824
2355
tcp_server.server_activate()
2827
2358
service.port = tcp_server.socket.getsockname()[1]
2828
2359
if use_ipv6:
2829
2360
logger.info("Now listening on address %r, port %d,"
2830
" flowinfo %d, scope_id %d",
2831
*tcp_server.socket.getsockname())
2361
" flowinfo %d, scope_id %d"
2362
% tcp_server.socket.getsockname())
2832
2363
else: # IPv4
2833
logger.info("Now listening on address %r, port %d",
2834
*tcp_server.socket.getsockname())
2364
logger.info("Now listening on address %r, port %d"
2365
% tcp_server.socket.getsockname())
2835
2366
2836
2367
#service.interface = tcp_server.socket.getsockname()[3]
2837
2368
2840
2371
try:
2841
2372
service.activate()
2842
2373
except dbus.exceptions.DBusException as error:
2843
logger.critical("D-Bus Exception", exc_info=error)
2374
logger.critical("DBusException: %s", error)
2844
2375
cleanup()
2845
2376
sys.exit(1)
2846
2377
# End of Avahi example code
2853
2384
logger.debug("Starting main loop")
2854
2385
main_loop.run()
2855
2386
except AvahiError as error:
2856
logger.critical("Avahi Error", exc_info=error)
2387
logger.critical("AvahiError: %s", error)
2857
2388
cleanup()
2858
2389
sys.exit(1)
2859
2390
except KeyboardInterrupt:
2864
2395
# Must run before the D-Bus bus name gets deregistered
2865
2396
cleanup()
2866
2397
2398
2867
2399
if __name__ == '__main__':
2868
2400
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0