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- Committer: teddy at bsnet
- Date: 2011-11-12 18:14:55 UTC
- mto: This revision was merged to the branch mainline in revision 522.
- Revision ID: teddy@fukt.bsnet.se-20111112181455-8m6z4qrrib33bl2c
* plugins.d/mandos-client.c (SYNOPSIS, OPTIONS): Document
"--network-hook-dir"
option.
"--network-hook-dir"
option.
- 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 = "1.6.6"
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
437
311
last_approval_request: datetime.datetime(); (UTC) or None
438
312
last_checked_ok: datetime.datetime(); (UTC) or None
439
313
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
314
status of last checker. -1 reflect crashed
315
checker, 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()
401
self.client_structure = [attr for attr
402
in self.__dict__.iterkeys()
573
403
if not attr.startswith("_")]
574
404
self.client_structure.append("client_structure")
575
405
406
576
407
for name, t in inspect.getmembers(type(self),
577
408
lambda obj:
578
409
isinstance(obj,
590
421
if getattr(self, "enabled", False):
591
422
# Already enabled
592
423
return
424
self.send_changedstate()
593
425
self.expires = datetime.datetime.utcnow() + self.timeout
594
426
self.enabled = True
595
427
self.last_enabled = datetime.datetime.utcnow()
596
428
self.init_checker()
597
self.send_changedstate()
598
429
599
430
def disable(self, quiet=True):
600
431
"""Disable this client."""
601
432
if not getattr(self, "enabled", False):
602
433
return False
603
434
if not quiet:
435
self.send_changedstate()
436
if not quiet:
604
437
logger.info("Disabling client %s", self.name)
605
if getattr(self, "disable_initiator_tag", None) is not None:
438
if getattr(self, "disable_initiator_tag", False):
606
439
gobject.source_remove(self.disable_initiator_tag)
607
440
self.disable_initiator_tag = None
608
441
self.expires = None
609
if getattr(self, "checker_initiator_tag", None) is not None:
442
if getattr(self, "checker_initiator_tag", False):
610
443
gobject.source_remove(self.checker_initiator_tag)
611
444
self.checker_initiator_tag = None
612
445
self.stop_checker()
613
446
self.enabled = False
614
if not quiet:
615
self.send_changedstate()
616
447
# Do not run this again if called by a gobject.timeout_add
617
448
return False
618
449
619
450
def __del__(self):
620
451
self.disable()
621
452
622
453
def init_checker(self):
623
454
# Schedule a new checker to be started an 'interval' from now,
624
455
# and every interval from then on.
625
if self.checker_initiator_tag is not None:
626
gobject.source_remove(self.checker_initiator_tag)
627
456
self.checker_initiator_tag = (gobject.timeout_add
628
457
(self.interval_milliseconds(),
629
458
self.start_checker))
630
459
# 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
460
self.disable_initiator_tag = (gobject.timeout_add
634
461
(self.timeout_milliseconds(),
635
462
self.disable))
636
463
# Also start a new checker *right now*.
637
464
self.start_checker()
638
465
466
639
467
def checker_callback(self, pid, condition, command):
640
468
"""The checker has completed, so take appropriate actions."""
641
469
self.checker_callback_tag = None
642
470
self.checker = None
643
471
if os.WIFEXITED(condition):
644
self.last_checker_status = os.WEXITSTATUS(condition)
472
self.last_checker_status = os.WEXITSTATUS(condition)
645
473
if self.last_checker_status == 0:
646
474
logger.info("Checker for %(name)s succeeded",
647
475
vars(self))
654
482
logger.warning("Checker for %(name)s crashed?",
655
483
vars(self))
656
484
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."""
485
def checked_ok(self, timeout=None):
486
"""Bump up the timeout for this client.
487
488
This should only be called when the client has been seen,
489
alive and well.
490
"""
665
491
if timeout is None:
666
492
timeout = self.timeout
493
self.last_checked_ok = datetime.datetime.utcnow()
667
494
if self.disable_initiator_tag is not None:
668
495
gobject.source_remove(self.disable_initiator_tag)
669
self.disable_initiator_tag = None
670
496
if getattr(self, "enabled", False):
671
497
self.disable_initiator_tag = (gobject.timeout_add
672
(timedelta_to_milliseconds
498
(_timedelta_to_milliseconds
673
499
(timeout), self.disable))
674
500
self.expires = datetime.datetime.utcnow() + timeout
675
501
682
508
If a checker already exists, leave it running and do
683
509
nothing."""
684
510
# 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
511
# did that, then if a checker (for some reason) started
512
# running slowly and taking more than 'interval' time, the
513
# client would inevitably timeout, since no checker would get
514
# a chance to run to completion. If we instead leave running
689
515
# checkers alone, the checker would have to take more time
690
516
# than 'timeout' for the client to be disabled, which is as it
691
517
# should be.
693
519
# If a checker exists, make sure it is not a zombie
694
520
try:
695
521
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
522
except (AttributeError, OSError) as error:
523
if (isinstance(error, OSError)
524
and error.errno != errno.ECHILD):
525
raise error
701
526
else:
702
527
if pid:
703
528
logger.warning("Checker was a zombie")
706
531
self.current_checker_command)
707
532
# Start a new checker if needed
708
533
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
534
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
535
# In case checker_command has exactly one % operator
536
command = self.checker_command % self.host
537
except TypeError:
538
# Escape attributes for the shell
539
escaped_attrs = dict(
540
(attr,
541
re.escape(unicode(str(getattr(self, attr, "")),
542
errors=
543
'replace')))
544
for attr in
545
self.runtime_expansions)
546
547
try:
548
command = self.checker_command % escaped_attrs
549
except TypeError as error:
550
logger.error('Could not format string "%s":'
551
' %s', self.checker_command, error)
552
return True # Try again later
720
553
self.current_checker_command = command
721
554
try:
722
555
logger.info("Starting checker %r for %s",
725
558
# in normal mode, that is already done by daemon(),
726
559
# and in debug mode we don't want to. (Stdin is
727
560
# 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
561
self.checker = subprocess.Popen(command,
737
562
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:
563
shell=True, cwd="/")
564
self.checker_callback_tag = (gobject.child_watch_add
565
(self.checker.pid,
566
self.checker_callback,
567
data=command))
568
# The checker may have completed before the gobject
569
# watch was added. Check for this.
751
570
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
571
if pid:
572
gobject.source_remove(self.checker_callback_tag)
573
self.checker_callback(pid, status, command)
752
574
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)
575
logger.error("Failed to start subprocess: %s",
576
error)
762
577
# Re-run this periodically if run by gobject.timeout_add
763
578
return True
764
579
771
586
return
772
587
logger.debug("Stopping checker for %(name)s", vars(self))
773
588
try:
774
self.checker.terminate()
589
os.kill(self.checker.pid, signal.SIGTERM)
775
590
#time.sleep(0.5)
776
591
#if self.checker.poll() is None:
777
# self.checker.kill()
592
# os.kill(self.checker.pid, signal.SIGKILL)
778
593
except OSError as error:
779
594
if error.errno != errno.ESRCH: # No such process
780
595
raise
781
596
self.checker = None
782
597
598
# Encrypts a client secret and stores it in a varible
599
# encrypted_secret
600
def encrypt_secret(self, key):
601
# Encryption-key need to be of a specific size, so we hash
602
# supplied key
603
hasheng = hashlib.sha256()
604
hasheng.update(key)
605
encryptionkey = hasheng.digest()
606
607
# Create validation hash so we know at decryption if it was
608
# sucessful
609
hasheng = hashlib.sha256()
610
hasheng.update(self.secret)
611
validationhash = hasheng.digest()
612
613
# Encrypt secret
614
iv = os.urandom(Crypto.Cipher.AES.block_size)
615
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
616
Crypto.Cipher.AES.MODE_CFB, iv)
617
ciphertext = ciphereng.encrypt(validationhash+self.secret)
618
self.encrypted_secret = (ciphertext, iv)
619
620
# Decrypt a encrypted client secret
621
def decrypt_secret(self, key):
622
# Decryption-key need to be of a specific size, so we hash
623
# supplied key
624
hasheng = hashlib.sha256()
625
hasheng.update(key)
626
encryptionkey = hasheng.digest()
627
628
# Decrypt encrypted secret
629
ciphertext, iv = self.encrypted_secret
630
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
631
Crypto.Cipher.AES.MODE_CFB, iv)
632
plain = ciphereng.decrypt(ciphertext)
633
634
# Validate decrypted secret to know if it was succesful
635
hasheng = hashlib.sha256()
636
validationhash = plain[:hasheng.digest_size]
637
secret = plain[hasheng.digest_size:]
638
hasheng.update(secret)
639
640
# If validation fails, we use key as new secret. Otherwise, we
641
# use the decrypted secret
642
if hasheng.digest() == validationhash:
643
self.secret = secret
644
else:
645
self.secret = key
646
del self.encrypted_secret
647
783
648
784
649
def dbus_service_property(dbus_interface, signature="v",
785
650
access="readwrite", byte_arrays=False):
797
662
# "Set" method, so we fail early here:
798
663
if byte_arrays and signature != "ay":
799
664
raise ValueError("Byte arrays not supported for non-'ay'"
800
" signature {0!r}".format(signature))
665
" signature %r" % signature)
801
666
def decorator(func):
802
667
func._dbus_is_property = True
803
668
func._dbus_interface = dbus_interface
811
676
return decorator
812
677
813
678
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
679
class DBusPropertyException(dbus.exceptions.DBusException):
852
680
"""A base class for D-Bus property-related exceptions
853
681
"""
876
704
"""
877
705
878
706
@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)
707
def _is_dbus_property(obj):
708
return getattr(obj, "_dbus_is_property", False)
887
709
888
def _get_all_dbus_things(self, thing):
710
def _get_all_dbus_properties(self):
889
711
"""Returns a generator of (name, attribute) pairs
890
712
"""
891
return ((getattr(athing.__get__(self), "_dbus_name",
892
name),
893
athing.__get__(self))
713
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
894
714
for cls in self.__class__.__mro__
895
for name, athing in
896
inspect.getmembers(cls,
897
self._is_dbus_thing(thing)))
715
for name, prop in
716
inspect.getmembers(cls, self._is_dbus_property))
898
717
899
718
def _get_dbus_property(self, interface_name, property_name):
900
719
"""Returns a bound method if one exists which is a D-Bus
902
721
"""
903
722
for cls in self.__class__.__mro__:
904
723
for name, value in (inspect.getmembers
905
(cls,
906
self._is_dbus_thing("property"))):
724
(cls, self._is_dbus_property)):
907
725
if (value._dbus_name == property_name
908
726
and value._dbus_interface == interface_name):
909
727
return value.__get__(self)
937
755
# The byte_arrays option is not supported yet on
938
756
# signatures other than "ay".
939
757
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))
758
raise ValueError
759
value = dbus.ByteArray(''.join(unichr(byte)
760
for byte in value))
945
761
prop(value)
946
762
947
763
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
952
768
953
769
Note: Will not include properties with access="write".
954
770
"""
955
properties = {}
956
for name, prop in self._get_all_dbus_things("property"):
771
all = {}
772
for name, prop in self._get_all_dbus_properties():
957
773
if (interface_name
958
774
and interface_name != prop._dbus_interface):
959
775
# Interface non-empty but did not match
963
779
continue
964
780
value = prop()
965
781
if not hasattr(value, "variant_level"):
966
properties[name] = value
782
all[name] = value
967
783
continue
968
properties[name] = type(value)(value, variant_level=
969
value.variant_level+1)
970
return dbus.Dictionary(properties, signature="sv")
784
all[name] = type(value)(value, variant_level=
785
value.variant_level+1)
786
return dbus.Dictionary(all, signature="sv")
971
787
972
788
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
973
789
out_signature="s",
974
790
path_keyword='object_path',
975
791
connection_keyword='connection')
976
792
def Introspect(self, object_path, connection):
977
"""Overloading of standard D-Bus method.
978
979
Inserts property tags and interface annotation tags.
793
"""Standard D-Bus method, overloaded to insert property tags.
980
794
"""
981
795
xmlstring = dbus.service.Object.Introspect(self, object_path,
982
796
connection)
989
803
e.setAttribute("access", prop._dbus_access)
990
804
return e
991
805
for if_tag in document.getElementsByTagName("interface"):
992
# Add property tags
993
806
for tag in (make_tag(document, name, prop)
994
807
for name, prop
995
in self._get_all_dbus_things("property")
808
in self._get_all_dbus_properties()
996
809
if prop._dbus_interface
997
810
== if_tag.getAttribute("name")):
998
811
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
812
# Add the names to the return values for the
1031
813
# "org.freedesktop.DBus.Properties" methods
1032
814
if (if_tag.getAttribute("name")
1047
829
except (AttributeError, xml.dom.DOMException,
1048
830
xml.parsers.expat.ExpatError) as error:
1049
831
logger.error("Failed to override Introspection method",
1050
exc_info=error)
832
error)
1051
833
return xmlstring
1052
834
1053
835
1054
def datetime_to_dbus(dt, variant_level=0):
836
def datetime_to_dbus (dt, variant_level=0):
1055
837
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1056
838
if dt is None:
1057
839
return dbus.String("", variant_level = variant_level)
1058
840
return dbus.String(dt.isoformat(),
1059
841
variant_level=variant_level)
1060
842
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).
843
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
844
.__metaclass__):
845
"""Applied to an empty subclass of a D-Bus object, this metaclass
846
will add additional D-Bus attributes matching a certain pattern.
1084
847
"""
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):
848
def __new__(mcs, name, bases, attr):
849
# Go through all the base classes which could have D-Bus
850
# methods, signals, or properties in them
851
for base in (b for b in bases
852
if issubclass(b, dbus.service.Object)):
853
# Go though all attributes of the base class
854
for attrname, attribute in inspect.getmembers(base):
1092
855
# Ignore non-D-Bus attributes, and D-Bus attributes
1093
856
# with the wrong interface name
1094
857
if (not hasattr(attribute, "_dbus_interface")
1095
858
or not attribute._dbus_interface
1096
.startswith(orig_interface_name)):
859
.startswith("se.recompile.Mandos")):
1097
860
continue
1098
861
# Create an alternate D-Bus interface name based on
1099
862
# the current name
1100
863
alt_interface = (attribute._dbus_interface
1101
.replace(orig_interface_name,
1102
alt_interface_name))
1103
interface_names.add(alt_interface)
864
.replace("se.recompile.Mandos",
865
"se.bsnet.fukt.Mandos"))
1104
866
# Is this a D-Bus signal?
1105
867
if getattr(attribute, "_dbus_is_signal", False):
1106
# Extract the original non-method undecorated
1107
# function by black magic
868
# Extract the original non-method function by
869
# black magic
1108
870
nonmethod_func = (dict(
1109
871
zip(attribute.func_code.co_freevars,
1110
872
attribute.__closure__))["func"]
1121
883
nonmethod_func.func_name,
1122
884
nonmethod_func.func_defaults,
1123
885
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
886
# 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
887
# old and new functions, so both the old and new
888
# signals gets sent when the function is called
1134
889
def fixscope(func1, func2):
1135
890
"""This function is a scope container to pass
1136
891
func1 and func2 to the "call_both" function
1143
898
return call_both
1144
899
# Create the "call_both" function and add it to
1145
900
# the class
1146
attr[attrname] = fixscope(attribute, new_function)
901
attr[attrname] = fixscope(attribute,
902
new_function)
1147
903
# Is this a D-Bus method?
1148
904
elif getattr(attribute, "_dbus_is_method", False):
1149
905
# Create a new, but exactly alike, function
1160
916
attribute.func_name,
1161
917
attribute.func_defaults,
1162
918
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
919
# Is this a D-Bus property?
1170
920
elif getattr(attribute, "_dbus_is_property", False):
1171
921
# Create a new, but exactly alike, function
1185
935
attribute.func_name,
1186
936
attribute.func_defaults,
1187
937
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"})
938
return type.__new__(mcs, name, bases, attr)
939
1233
940
class ClientDBus(Client, DBusObjectWithProperties):
1234
941
"""A Client class using D-Bus
1235
942
1245
952
1246
953
def __init__(self, bus = None, *args, **kwargs):
1247
954
self.bus = bus
955
self._approvals_pending = 0
1248
956
Client.__init__(self, *args, **kwargs)
957
self.add_to_dbus()
958
959
def add_to_dbus(self):
1249
960
# Only now, when this client is initialized, can it show up on
1250
961
# the D-Bus
1251
962
client_object_name = unicode(self.name).translate(
1255
966
("/clients/" + client_object_name))
1256
967
DBusObjectWithProperties.__init__(self, self.bus,
1257
968
self.dbus_object_path)
1258
969
1259
970
def notifychangeproperty(transform_func,
1260
971
dbus_name, type_func=lambda x: x,
1261
972
variant_level=1):
1262
973
""" Modify a variable so that it's a property which announces
1263
974
its changes to DBus.
1264
975
1265
976
transform_fun: Function that takes a value and a variant_level
1266
977
and transforms it to a D-Bus type.
1267
978
dbus_name: D-Bus name of the variable
1284
995
1285
996
return property(lambda self: getattr(self, attrname), setter)
1286
997
998
1287
999
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1288
1000
approvals_pending = notifychangeproperty(dbus.Boolean,
1289
1001
"ApprovalPending",
1296
1008
checker is not None)
1297
1009
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1298
1010
"LastCheckedOK")
1299
last_checker_status = notifychangeproperty(dbus.Int16,
1300
"LastCheckerStatus")
1301
1011
last_approval_request = notifychangeproperty(
1302
1012
datetime_to_dbus, "LastApprovalRequest")
1303
1013
approved_by_default = notifychangeproperty(dbus.Boolean,
1304
1014
"ApprovedByDefault")
1305
approval_delay = notifychangeproperty(dbus.UInt64,
1015
approval_delay = notifychangeproperty(dbus.UInt16,
1306
1016
"ApprovalDelay",
1307
1017
type_func =
1308
timedelta_to_milliseconds)
1018
_timedelta_to_milliseconds)
1309
1019
approval_duration = notifychangeproperty(
1310
dbus.UInt64, "ApprovalDuration",
1311
type_func = timedelta_to_milliseconds)
1020
dbus.UInt16, "ApprovalDuration",
1021
type_func = _timedelta_to_milliseconds)
1312
1022
host = notifychangeproperty(dbus.String, "Host")
1313
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1023
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1314
1024
type_func =
1315
timedelta_to_milliseconds)
1025
_timedelta_to_milliseconds)
1316
1026
extended_timeout = notifychangeproperty(
1317
dbus.UInt64, "ExtendedTimeout",
1318
type_func = timedelta_to_milliseconds)
1319
interval = notifychangeproperty(dbus.UInt64,
1027
dbus.UInt16, "ExtendedTimeout",
1028
type_func = _timedelta_to_milliseconds)
1029
interval = notifychangeproperty(dbus.UInt16,
1320
1030
"Interval",
1321
1031
type_func =
1322
timedelta_to_milliseconds)
1032
_timedelta_to_milliseconds)
1323
1033
checker_command = notifychangeproperty(dbus.String, "Checker")
1324
1034
1325
1035
del notifychangeproperty
1353
1063
*args, **kwargs)
1354
1064
1355
1065
def start_checker(self, *args, **kwargs):
1356
old_checker_pid = getattr(self.checker, "pid", None)
1066
old_checker = self.checker
1067
if self.checker is not None:
1068
old_checker_pid = self.checker.pid
1069
else:
1070
old_checker_pid = None
1357
1071
r = Client.start_checker(self, *args, **kwargs)
1358
1072
# Only if new checker process was started
1359
1073
if (self.checker is not None
1363
1077
return r
1364
1078
1365
1079
def _reset_approved(self):
1366
self.approved = None
1080
self._approved = None
1367
1081
return False
1368
1082
1369
1083
def approve(self, value=True):
1370
self.approved = value
1371
gobject.timeout_add(timedelta_to_milliseconds
1084
self.send_changedstate()
1085
self._approved = value
1086
gobject.timeout_add(_timedelta_to_milliseconds
1372
1087
(self.approval_duration),
1373
1088
self._reset_approved)
1374
self.send_changedstate()
1089
1375
1090
1376
1091
## D-Bus methods, signals & properties
1377
1092
_interface = "se.recompile.Mandos.Client"
1378
1093
1379
## Interfaces
1380
1381
@dbus_interface_annotations(_interface)
1382
def _foo(self):
1383
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1384
"false"}
1385
1386
1094
## Signals
1387
1095
1388
1096
# CheckerCompleted - signal
1487
1195
access="readwrite")
1488
1196
def ApprovalDuration_dbus_property(self, value=None):
1489
1197
if value is None: # get
1490
return dbus.UInt64(timedelta_to_milliseconds(
1198
return dbus.UInt64(_timedelta_to_milliseconds(
1491
1199
self.approval_duration))
1492
1200
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1493
1201
1507
1215
def Host_dbus_property(self, value=None):
1508
1216
if value is None: # get
1509
1217
return dbus.String(self.host)
1510
self.host = unicode(value)
1218
self.host = value
1511
1219
1512
1220
# Created - property
1513
1221
@dbus_service_property(_interface, signature="s", access="read")
1514
1222
def Created_dbus_property(self):
1515
return datetime_to_dbus(self.created)
1223
return dbus.String(datetime_to_dbus(self.created))
1516
1224
1517
1225
# LastEnabled - property
1518
1226
@dbus_service_property(_interface, signature="s", access="read")
1539
1247
return
1540
1248
return datetime_to_dbus(self.last_checked_ok)
1541
1249
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
1250
# Expires - property
1549
1251
@dbus_service_property(_interface, signature="s", access="read")
1550
1252
def Expires_dbus_property(self):
1561
1263
def Timeout_dbus_property(self, value=None):
1562
1264
if value is None: # get
1563
1265
return dbus.UInt64(self.timeout_milliseconds())
1564
old_timeout = self.timeout
1565
1266
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))
1267
if getattr(self, "disable_initiator_tag", None) is None:
1268
return
1269
# Reschedule timeout
1270
gobject.source_remove(self.disable_initiator_tag)
1271
self.disable_initiator_tag = None
1272
self.expires = None
1273
time_to_die = _timedelta_to_milliseconds((self
1274
.last_checked_ok
1275
+ self.timeout)
1276
- datetime.datetime
1277
.utcnow())
1278
if time_to_die <= 0:
1279
# The timeout has passed
1280
self.disable()
1281
else:
1282
self.expires = (datetime.datetime.utcnow()
1283
+ datetime.timedelta(milliseconds =
1284
time_to_die))
1285
self.disable_initiator_tag = (gobject.timeout_add
1286
(time_to_die, self.disable))
1582
1287
1583
1288
# ExtendedTimeout - property
1584
1289
@dbus_service_property(_interface, signature="t",
1597
1302
self.interval = datetime.timedelta(0, 0, 0, value)
1598
1303
if getattr(self, "checker_initiator_tag", None) is None:
1599
1304
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
1305
# Reschedule checker run
1306
gobject.source_remove(self.checker_initiator_tag)
1307
self.checker_initiator_tag = (gobject.timeout_add
1308
(value, self.start_checker))
1309
self.start_checker() # Start one now, too
1606
1310
1607
1311
# Checker - property
1608
1312
@dbus_service_property(_interface, signature="s",
1610
1314
def Checker_dbus_property(self, value=None):
1611
1315
if value is None: # get
1612
1316
return dbus.String(self.checker_command)
1613
self.checker_command = unicode(value)
1317
self.checker_command = value
1614
1318
1615
1319
# CheckerRunning - property
1616
1320
@dbus_service_property(_interface, signature="b",
1645
1349
raise KeyError()
1646
1350
1647
1351
def __getattribute__(self, name):
1648
if name == '_pipe':
1352
if(name == '_pipe'):
1649
1353
return super(ProxyClient, self).__getattribute__(name)
1650
1354
self._pipe.send(('getattr', name))
1651
1355
data = self._pipe.recv()
1658
1362
return func
1659
1363
1660
1364
def __setattr__(self, name, value):
1661
if name == '_pipe':
1365
if(name == '_pipe'):
1662
1366
return super(ProxyClient, self).__setattr__(name, value)
1663
1367
self._pipe.send(('setattr', name, value))
1664
1368
1369
class ClientDBusTransitional(ClientDBus):
1370
__metaclass__ = AlternateDBusNamesMetaclass
1665
1371
1666
1372
class ClientHandler(socketserver.BaseRequestHandler, object):
1667
1373
"""A class to handle client connections.
1704
1410
logger.debug("Protocol version: %r", line)
1705
1411
try:
1706
1412
if int(line.strip().split()[0]) > 1:
1707
raise RuntimeError(line)
1413
raise RuntimeError
1708
1414
except (ValueError, IndexError, RuntimeError) as error:
1709
1415
logger.error("Unknown protocol version: %s", error)
1710
1416
return
1750
1456
client.Rejected("Disabled")
1751
1457
return
1752
1458
1753
if client.approved or not client.approval_delay:
1459
if client._approved or not client.approval_delay:
1754
1460
#We are approved or approval is disabled
1755
1461
break
1756
elif client.approved is None:
1462
elif client._approved is None:
1757
1463
logger.info("Client %s needs approval",
1758
1464
client.name)
1759
1465
if self.server.use_dbus:
1772
1478
#wait until timeout or approved
1773
1479
time = datetime.datetime.now()
1774
1480
client.changedstate.acquire()
1775
client.changedstate.wait(
1776
float(timedelta_to_milliseconds(delay)
1777
/ 1000))
1481
(client.changedstate.wait
1482
(float(client._timedelta_to_milliseconds(delay)
1483
/ 1000)))
1778
1484
client.changedstate.release()
1779
1485
time2 = datetime.datetime.now()
1780
1486
if (time2 - time) >= delay:
1796
1502
try:
1797
1503
sent = session.send(client.secret[sent_size:])
1798
1504
except gnutls.errors.GNUTLSError as error:
1799
logger.warning("gnutls send failed",
1800
exc_info=error)
1505
logger.warning("gnutls send failed")
1801
1506
return
1802
1507
logger.debug("Sent: %d, remaining: %d",
1803
1508
sent, len(client.secret)
1806
1511
1807
1512
logger.info("Sending secret to %s", client.name)
1808
1513
# bump the timeout using extended_timeout
1809
client.bump_timeout(client.extended_timeout)
1514
client.checked_ok(client.extended_timeout)
1810
1515
if self.server.use_dbus:
1811
1516
# Emit D-Bus signal
1812
1517
client.GotSecret()
1817
1522
try:
1818
1523
session.bye()
1819
1524
except gnutls.errors.GNUTLSError as error:
1820
logger.warning("GnuTLS bye failed",
1821
exc_info=error)
1525
logger.warning("GnuTLS bye failed")
1822
1526
1823
1527
@staticmethod
1824
1528
def peer_certificate(session):
1880
1584
# Convert the buffer to a Python bytestring
1881
1585
fpr = ctypes.string_at(buf, buf_len.value)
1882
1586
# Convert the bytestring to hexadecimal notation
1883
hex_fpr = binascii.hexlify(fpr).upper()
1587
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1884
1588
return hex_fpr
1885
1589
1886
1590
1889
1593
def sub_process_main(self, request, address):
1890
1594
try:
1891
1595
self.finish_request(request, address)
1892
except Exception:
1596
except:
1893
1597
self.handle_error(request, address)
1894
1598
self.close_request(request)
1895
1599
1896
1600
def process_request(self, request, address):
1897
1601
"""Start a new process to process the request."""
1898
1602
proc = multiprocessing.Process(target = self.sub_process_main,
1899
args = (request, address))
1603
args = (request,
1604
address))
1900
1605
proc.start()
1901
1606
return proc
1902
1607
1917
1622
1918
1623
def add_pipe(self, parent_pipe, proc):
1919
1624
"""Dummy function; override as necessary"""
1920
raise NotImplementedError()
1625
raise NotImplementedError
1921
1626
1922
1627
1923
1628
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1930
1635
use_ipv6: Boolean; to use IPv6 or not
1931
1636
"""
1932
1637
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
"""
1638
interface=None, use_ipv6=True):
1937
1639
self.interface = interface
1938
1640
if use_ipv6:
1939
1641
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
1642
socketserver.TCPServer.__init__(self, server_address,
1967
1643
RequestHandlerClass)
1968
1969
1644
def server_bind(self):
1970
1645
"""This overrides the normal server_bind() function
1971
1646
to bind to an interface if one was specified, and also NOT to
1979
1654
try:
1980
1655
self.socket.setsockopt(socket.SOL_SOCKET,
1981
1656
SO_BINDTODEVICE,
1982
str(self.interface + '\0'))
1657
str(self.interface
1658
+ '\0'))
1983
1659
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:
1660
if error[0] == errno.EPERM:
1661
logger.error("No permission to"
1662
" bind to interface %s",
1663
self.interface)
1664
elif error[0] == errno.ENOPROTOOPT:
1988
1665
logger.error("SO_BINDTODEVICE not available;"
1989
1666
" cannot bind to interface %s",
1990
1667
self.interface)
1991
elif error.errno == errno.ENODEV:
1992
logger.error("Interface %s does not exist,"
1993
" cannot bind", self.interface)
1994
1668
else:
1995
1669
raise
1996
1670
# Only bind(2) the socket if we really need to.
1999
1673
if self.address_family == socket.AF_INET6:
2000
1674
any_address = "::" # in6addr_any
2001
1675
else:
2002
any_address = "0.0.0.0" # INADDR_ANY
1676
any_address = socket.INADDR_ANY
2003
1677
self.server_address = (any_address,
2004
1678
self.server_address[1])
2005
1679
elif not self.server_address[1]:
2026
1700
"""
2027
1701
def __init__(self, server_address, RequestHandlerClass,
2028
1702
interface=None, use_ipv6=True, clients=None,
2029
gnutls_priority=None, use_dbus=True, socketfd=None):
1703
gnutls_priority=None, use_dbus=True):
2030
1704
self.enabled = False
2031
1705
self.clients = clients
2032
1706
if self.clients is None:
2036
1710
IPv6_TCPServer.__init__(self, server_address,
2037
1711
RequestHandlerClass,
2038
1712
interface = interface,
2039
use_ipv6 = use_ipv6,
2040
socketfd = socketfd)
1713
use_ipv6 = use_ipv6)
2041
1714
def server_activate(self):
2042
1715
if self.enabled:
2043
1716
return socketserver.TCPServer.server_activate(self)
2056
1729
2057
1730
def handle_ipc(self, source, condition, parent_pipe=None,
2058
1731
proc = None, client_object=None):
1732
condition_names = {
1733
gobject.IO_IN: "IN", # There is data to read.
1734
gobject.IO_OUT: "OUT", # Data can be written (without
1735
# blocking).
1736
gobject.IO_PRI: "PRI", # There is urgent data to read.
1737
gobject.IO_ERR: "ERR", # Error condition.
1738
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1739
# broken, usually for pipes and
1740
# sockets).
1741
}
1742
conditions_string = ' | '.join(name
1743
for cond, name in
1744
condition_names.iteritems()
1745
if cond & condition)
2059
1746
# error, or the other end of multiprocessing.Pipe has closed
2060
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1747
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2061
1748
# Wait for other process to exit
2062
1749
proc.join()
2063
1750
return False
2121
1808
return True
2122
1809
2123
1810
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
1811
def string_to_delta(interval):
2224
1812
"""Parse a string and return a datetime.timedelta
2225
1813
2236
1824
>>> string_to_delta('5m 30s')
2237
1825
datetime.timedelta(0, 330)
2238
1826
"""
2239
2240
try:
2241
return rfc3339_duration_to_delta(interval)
2242
except ValueError:
2243
pass
2244
2245
1827
timevalue = datetime.timedelta(0)
2246
1828
for s in interval.split():
2247
1829
try:
2258
1840
elif suffix == "w":
2259
1841
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2260
1842
else:
2261
raise ValueError("Unknown suffix {0!r}"
2262
.format(suffix))
2263
except IndexError as e:
1843
raise ValueError("Unknown suffix %r" % suffix)
1844
except (ValueError, IndexError) as e:
2264
1845
raise ValueError(*(e.args))
2265
1846
timevalue += delta
2266
1847
return timevalue
2267
1848
2268
1849
1850
def if_nametoindex(interface):
1851
"""Call the C function if_nametoindex(), or equivalent
1852
1853
Note: This function cannot accept a unicode string."""
1854
global if_nametoindex
1855
try:
1856
if_nametoindex = (ctypes.cdll.LoadLibrary
1857
(ctypes.util.find_library("c"))
1858
.if_nametoindex)
1859
except (OSError, AttributeError):
1860
logger.warning("Doing if_nametoindex the hard way")
1861
def if_nametoindex(interface):
1862
"Get an interface index the hard way, i.e. using fcntl()"
1863
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1864
with contextlib.closing(socket.socket()) as s:
1865
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1866
struct.pack(str("16s16x"),
1867
interface))
1868
interface_index = struct.unpack(str("I"),
1869
ifreq[16:20])[0]
1870
return interface_index
1871
return if_nametoindex(interface)
1872
1873
2269
1874
def daemon(nochdir = False, noclose = False):
2270
1875
"""See daemon(3). Standard BSD Unix function.
2271
1876
2279
1884
sys.exit()
2280
1885
if not noclose:
2281
1886
# Close all standard open file descriptors
2282
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1887
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2283
1888
if not stat.S_ISCHR(os.fstat(null).st_mode):
2284
1889
raise OSError(errno.ENODEV,
2285
"{0} not a character device"
2286
.format(os.devnull))
1890
"%s not a character device"
1891
% os.path.devnull)
2287
1892
os.dup2(null, sys.stdin.fileno())
2288
1893
os.dup2(null, sys.stdout.fileno())
2289
1894
os.dup2(null, sys.stderr.fileno())
2298
1903
2299
1904
parser = argparse.ArgumentParser()
2300
1905
parser.add_argument("-v", "--version", action="version",
2301
version = "%(prog)s {0}".format(version),
1906
version = "%%(prog)s %s" % version,
2302
1907
help="show version number and exit")
2303
1908
parser.add_argument("-i", "--interface", metavar="IF",
2304
1909
help="Bind to interface IF")
2310
1915
help="Run self-test")
2311
1916
parser.add_argument("--debug", action="store_true",
2312
1917
help="Debug mode; run in foreground and log"
2313
" to terminal", default=None)
1918
" to terminal")
2314
1919
parser.add_argument("--debuglevel", metavar="LEVEL",
2315
1920
help="Debug level for stdout output")
2316
1921
parser.add_argument("--priority", help="GnuTLS"
2323
1928
" files")
2324
1929
parser.add_argument("--no-dbus", action="store_false",
2325
1930
dest="use_dbus", help="Do not provide D-Bus"
2326
" system bus interface", default=None)
1931
" system bus interface")
2327
1932
parser.add_argument("--no-ipv6", action="store_false",
2328
dest="use_ipv6", help="Do not use IPv6",
2329
default=None)
1933
dest="use_ipv6", help="Do not use IPv6")
2330
1934
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
parser.add_argument("--no-zeroconf", action="store_false",
2341
dest="zeroconf", help="Do not use Zeroconf",
2342
default=None)
2343
1935
dest="restore",
1936
help="Do not restore stored state",
1937
default=True)
1938
2344
1939
options = parser.parse_args()
2345
1940
2346
1941
if options.check:
2347
1942
import doctest
2348
fail_count, test_count = doctest.testmod()
2349
sys.exit(os.EX_OK if fail_count == 0 else 1)
1943
doctest.testmod()
1944
sys.exit()
2350
1945
2351
1946
# Default values for config file for server-global settings
2352
1947
server_defaults = { "interface": "",
2354
1949
"port": "",
2355
1950
"debug": "False",
2356
1951
"priority":
2357
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1952
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2358
1953
"servicename": "Mandos",
2359
1954
"use_dbus": "True",
2360
1955
"use_ipv6": "True",
2361
1956
"debuglevel": "",
2362
"restore": "True",
2363
"socket": "",
2364
"statedir": "/var/lib/mandos",
2365
"foreground": "False",
2366
"zeroconf": "True",
2367
1957
}
2368
1958
2369
1959
# Parse config file for server-global settings
2374
1964
# Convert the SafeConfigParser object to a dict
2375
1965
server_settings = server_config.defaults()
2376
1966
# Use the appropriate methods on the non-string config options
2377
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1967
for option in ("debug", "use_dbus", "use_ipv6"):
2378
1968
server_settings[option] = server_config.getboolean("DEFAULT",
2379
1969
option)
2380
1970
if server_settings["port"]:
2381
1971
server_settings["port"] = server_config.getint("DEFAULT",
2382
1972
"port")
2383
if server_settings["socket"]:
2384
server_settings["socket"] = server_config.getint("DEFAULT",
2385
"socket")
2386
# Later, stdin will, and stdout and stderr might, be dup'ed
2387
# over with an opened os.devnull. But we don't want this to
2388
# happen with a supplied network socket.
2389
if 0 <= server_settings["socket"] <= 2:
2390
server_settings["socket"] = os.dup(server_settings
2391
["socket"])
2392
1973
del server_config
2393
1974
2394
1975
# Override the settings from the config file with command line
2395
1976
# options, if set.
2396
1977
for option in ("interface", "address", "port", "debug",
2397
1978
"priority", "servicename", "configdir",
2398
"use_dbus", "use_ipv6", "debuglevel", "restore",
2399
"statedir", "socket", "foreground", "zeroconf"):
1979
"use_dbus", "use_ipv6", "debuglevel", "restore"):
2400
1980
value = getattr(options, option)
2401
1981
if value is not None:
2402
1982
server_settings[option] = value
2405
1985
for option in server_settings.keys():
2406
1986
if type(server_settings[option]) is str:
2407
1987
server_settings[option] = unicode(server_settings[option])
2408
# Force all boolean options to be boolean
2409
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2410
"foreground", "zeroconf"):
2411
server_settings[option] = bool(server_settings[option])
2412
# Debug implies foreground
2413
if server_settings["debug"]:
2414
server_settings["foreground"] = True
2415
1988
# Now we have our good server settings in "server_settings"
2416
1989
2417
1990
##################################################################
2418
1991
2419
if (not server_settings["zeroconf"] and
2420
not (server_settings["port"]
2421
or server_settings["socket"] != "")):
2422
parser.error("Needs port or socket to work without"
2423
" Zeroconf")
2424
2425
1992
# For convenience
2426
1993
debug = server_settings["debug"]
2427
1994
debuglevel = server_settings["debuglevel"]
2428
1995
use_dbus = server_settings["use_dbus"]
2429
1996
use_ipv6 = server_settings["use_ipv6"]
2430
stored_state_path = os.path.join(server_settings["statedir"],
2431
stored_state_file)
2432
foreground = server_settings["foreground"]
2433
zeroconf = server_settings["zeroconf"]
2434
2435
if debug:
2436
initlogger(debug, logging.DEBUG)
2437
else:
2438
if not debuglevel:
2439
initlogger(debug)
2440
else:
2441
level = getattr(logging, debuglevel.upper())
2442
initlogger(debug, level)
2443
1997
2444
1998
if server_settings["servicename"] != "Mandos":
2445
1999
syslogger.setFormatter(logging.Formatter
2446
('Mandos ({0}) [%(process)d]:'
2447
' %(levelname)s: %(message)s'
2448
.format(server_settings
2449
["servicename"])))
2000
('Mandos (%s) [%%(process)d]:'
2001
' %%(levelname)s: %%(message)s'
2002
% server_settings["servicename"]))
2450
2003
2451
2004
# Parse config file with clients
2452
client_config = configparser.SafeConfigParser(Client
2453
.client_defaults)
2005
client_defaults = { "timeout": "5m",
2006
"extended_timeout": "15m",
2007
"interval": "2m",
2008
"checker": "fping -q -- %%(host)s",
2009
"host": "",
2010
"approval_delay": "0s",
2011
"approval_duration": "1s",
2012
}
2013
client_config = configparser.SafeConfigParser(client_defaults)
2454
2014
client_config.read(os.path.join(server_settings["configdir"],
2455
2015
"clients.conf"))
2456
2016
2457
2017
global mandos_dbus_service
2458
2018
mandos_dbus_service = None
2459
2019
2460
socketfd = None
2461
if server_settings["socket"] != "":
2462
socketfd = server_settings["socket"]
2463
2020
tcp_server = MandosServer((server_settings["address"],
2464
2021
server_settings["port"]),
2465
2022
ClientHandler,
2468
2025
use_ipv6=use_ipv6,
2469
2026
gnutls_priority=
2470
2027
server_settings["priority"],
2471
use_dbus=use_dbus,
2472
socketfd=socketfd)
2473
if not foreground:
2474
pidfilename = "/run/mandos.pid"
2475
if not os.path.isdir("/run/."):
2476
pidfilename = "/var/run/mandos.pid"
2477
pidfile = None
2028
use_dbus=use_dbus)
2029
if not debug:
2030
pidfilename = "/var/run/mandos.pid"
2478
2031
try:
2479
2032
pidfile = open(pidfilename, "w")
2480
except IOError as e:
2481
logger.error("Could not open file %r", pidfilename,
2482
exc_info=e)
2033
except IOError:
2034
logger.error("Could not open file %r", pidfilename)
2483
2035
2484
for name in ("_mandos", "mandos", "nobody"):
2036
try:
2037
uid = pwd.getpwnam("_mandos").pw_uid
2038
gid = pwd.getpwnam("_mandos").pw_gid
2039
except KeyError:
2485
2040
try:
2486
uid = pwd.getpwnam(name).pw_uid
2487
gid = pwd.getpwnam(name).pw_gid
2488
break
2041
uid = pwd.getpwnam("mandos").pw_uid
2042
gid = pwd.getpwnam("mandos").pw_gid
2489
2043
except KeyError:
2490
continue
2491
else:
2492
uid = 65534
2493
gid = 65534
2044
try:
2045
uid = pwd.getpwnam("nobody").pw_uid
2046
gid = pwd.getpwnam("nobody").pw_gid
2047
except KeyError:
2048
uid = 65534
2049
gid = 65534
2494
2050
try:
2495
2051
os.setgid(gid)
2496
2052
os.setuid(uid)
2497
2053
except OSError as error:
2498
if error.errno != errno.EPERM:
2499
raise
2054
if error[0] != errno.EPERM:
2055
raise error
2056
2057
if not debug and not debuglevel:
2058
logger.setLevel(logging.WARNING)
2059
if debuglevel:
2060
level = getattr(logging, debuglevel.upper())
2061
logger.setLevel(level)
2500
2062
2501
2063
if debug:
2064
logger.setLevel(logging.DEBUG)
2502
2065
# Enable all possible GnuTLS debugging
2503
2066
2504
2067
# "Use a log level over 10 to enable all debugging options."
2513
2076
.gnutls_global_set_log_function(debug_gnutls))
2514
2077
2515
2078
# Redirect stdin so all checkers get /dev/null
2516
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2079
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2517
2080
os.dup2(null, sys.stdin.fileno())
2518
2081
if null > 2:
2519
2082
os.close(null)
2083
else:
2084
# No console logging
2085
logger.removeHandler(console)
2520
2086
2521
2087
# Need to fork before connecting to D-Bus
2522
if not foreground:
2088
if not debug:
2523
2089
# Close all input and output, do double fork, etc.
2524
2090
daemon()
2525
2091
2526
# multiprocessing will use threads, so before we use gobject we
2527
# need to inform gobject that threads will be used.
2528
gobject.threads_init()
2529
2530
2092
global main_loop
2531
2093
# From the Avahi example code
2532
DBusGMainLoop(set_as_default=True)
2094
DBusGMainLoop(set_as_default=True )
2533
2095
main_loop = gobject.MainLoop()
2534
2096
bus = dbus.SystemBus()
2535
2097
# End of Avahi example code
2541
2103
("se.bsnet.fukt.Mandos", bus,
2542
2104
do_not_queue=True))
2543
2105
except dbus.exceptions.NameExistsException as e:
2544
logger.error("Disabling D-Bus:", exc_info=e)
2106
logger.error(unicode(e) + ", disabling D-Bus")
2545
2107
use_dbus = False
2546
2108
server_settings["use_dbus"] = False
2547
2109
tcp_server.use_dbus = False
2548
if zeroconf:
2549
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2550
service = AvahiServiceToSyslog(name =
2551
server_settings["servicename"],
2552
servicetype = "_mandos._tcp",
2553
protocol = protocol, bus = bus)
2554
if server_settings["interface"]:
2555
service.interface = (if_nametoindex
2556
(str(server_settings["interface"])))
2110
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2111
service = AvahiServiceToSyslog(name =
2112
server_settings["servicename"],
2113
servicetype = "_mandos._tcp",
2114
protocol = protocol, bus = bus)
2115
if server_settings["interface"]:
2116
service.interface = (if_nametoindex
2117
(str(server_settings["interface"])))
2557
2118
2558
2119
global multiprocessing_manager
2559
2120
multiprocessing_manager = multiprocessing.Manager()
2560
2121
2561
2122
client_class = Client
2562
2123
if use_dbus:
2563
client_class = functools.partial(ClientDBus, bus = bus)
2564
2565
client_settings = Client.config_parser(client_config)
2124
client_class = functools.partial(ClientDBusTransitional,
2125
bus = bus)
2126
2127
special_settings = {
2128
# Some settings need to be accessd by special methods;
2129
# booleans need .getboolean(), etc. Here is a list of them:
2130
"approved_by_default":
2131
lambda section:
2132
client_config.getboolean(section, "approved_by_default"),
2133
}
2134
# Construct a new dict of client settings of this form:
2135
# { client_name: {setting_name: value, ...}, ...}
2136
# with exceptions for any special settings as defined above
2137
client_settings = dict((clientname,
2138
dict((setting,
2139
(value if
2140
setting not in special_settings
2141
else special_settings[setting]
2142
(clientname)))
2143
for setting, value
2144
in client_config.items(clientname)))
2145
for clientname in client_config.sections())
2146
2566
2147
old_client_settings = {}
2567
clients_data = {}
2568
2569
# This is used to redirect stdout and stderr for checker processes
2570
global wnull
2571
wnull = open(os.devnull, "w") # A writable /dev/null
2572
# Only used if server is running in foreground but not in debug
2573
# mode
2574
if debug or not foreground:
2575
wnull.close()
2576
2577
# Get client data and settings from last running state.
2148
clients_data = []
2149
2150
# Get client data and settings from last running state.
2578
2151
if server_settings["restore"]:
2579
2152
try:
2580
2153
with open(stored_state_path, "rb") as stored_state:
2581
clients_data, old_client_settings = (pickle.load
2582
(stored_state))
2154
clients_data, old_client_settings = (
2155
pickle.load(stored_state))
2583
2156
os.remove(stored_state_path)
2584
2157
except IOError as e:
2585
if e.errno == errno.ENOENT:
2586
logger.warning("Could not load persistent state: {0}"
2587
.format(os.strerror(e.errno)))
2588
else:
2589
logger.critical("Could not load persistent state:",
2590
exc_info=e)
2158
logger.warning("Could not load persistant state: {0}"
2159
.format(e))
2160
if e.errno != errno.ENOENT:
2591
2161
raise
2592
except EOFError as e:
2593
logger.warning("Could not load persistent state: "
2594
"EOFError:", exc_info=e)
2595
2596
with PGPEngine() as pgp:
2597
for client_name, client in clients_data.iteritems():
2598
# Skip removed clients
2599
if client_name not in client_settings:
2600
continue
2601
2602
# Decide which value to use after restoring saved state.
2603
# We have three different values: Old config file,
2604
# new config file, and saved state.
2605
# New config value takes precedence if it differs from old
2606
# config value, otherwise use saved state.
2607
for name, value in client_settings[client_name].items():
2608
try:
2609
# For each value in new config, check if it
2610
# differs from the old config value (Except for
2611
# the "secret" attribute)
2612
if (name != "secret" and
2613
value != old_client_settings[client_name]
2614
[name]):
2615
client[name] = value
2616
except KeyError:
2617
pass
2618
2619
# Clients who has passed its expire date can still be
2620
# enabled if its last checker was successful. Clients
2621
# whose checker succeeded before we stored its state is
2622
# assumed to have successfully run all checkers during
2623
# downtime.
2624
if client["enabled"]:
2625
if datetime.datetime.utcnow() >= client["expires"]:
2626
if not client["last_checked_ok"]:
2627
logger.warning(
2628
"disabling client {0} - Client never "
2629
"performed a successful checker"
2630
.format(client_name))
2631
client["enabled"] = False
2632
elif client["last_checker_status"] != 0:
2633
logger.warning(
2634
"disabling client {0} - Client "
2635
"last checker failed with error code {1}"
2636
.format(client_name,
2637
client["last_checker_status"]))
2638
client["enabled"] = False
2639
else:
2640
client["expires"] = (datetime.datetime
2641
.utcnow()
2642
+ client["timeout"])
2643
logger.debug("Last checker succeeded,"
2644
" keeping {0} enabled"
2645
.format(client_name))
2162
2163
for client in clients_data:
2164
client_name = client["name"]
2165
2166
# Decide which value to use after restoring saved state.
2167
# We have three different values: Old config file,
2168
# new config file, and saved state.
2169
# New config value takes precedence if it differs from old
2170
# config value, otherwise use saved state.
2171
for name, value in client_settings[client_name].items():
2646
2172
try:
2647
client["secret"] = (
2648
pgp.decrypt(client["encrypted_secret"],
2649
client_settings[client_name]
2650
["secret"]))
2651
except PGPError:
2652
# If decryption fails, we use secret from new settings
2653
logger.debug("Failed to decrypt {0} old secret"
2654
.format(client_name))
2655
client["secret"] = (
2656
client_settings[client_name]["secret"])
2657
2658
# Add/remove clients based on new changes made to config
2659
for client_name in (set(old_client_settings)
2660
- set(client_settings)):
2661
del clients_data[client_name]
2662
for client_name in (set(client_settings)
2663
- set(old_client_settings)):
2664
clients_data[client_name] = client_settings[client_name]
2665
2666
# Create all client objects
2667
for client_name, client in clients_data.iteritems():
2668
tcp_server.clients[client_name] = client_class(
2669
name = client_name, settings = client,
2670
server_settings = server_settings)
2173
# For each value in new config, check if it differs
2174
# from the old config value (Except for the "secret"
2175
# attribute)
2176
if (name != "secret" and
2177
value != old_client_settings[client_name][name]):
2178
setattr(client, name, value)
2179
except KeyError:
2180
pass
2181
2182
# Clients who has passed its expire date, can still be enabled
2183
# if its last checker was sucessful. Clients who checkers
2184
# failed before we stored it state is asumed to had failed
2185
# checker during downtime.
2186
if client["enabled"] and client["last_checked_ok"]:
2187
if ((datetime.datetime.utcnow()
2188
- client["last_checked_ok"]) > client["interval"]):
2189
if client["last_checker_status"] != 0:
2190
client["enabled"] = False
2191
else:
2192
client["expires"] = (datetime.datetime.utcnow()
2193
+ client["timeout"])
2194
2195
client["changedstate"] = (multiprocessing_manager
2196
.Condition(multiprocessing_manager
2197
.Lock()))
2198
if use_dbus:
2199
new_client = ClientDBusTransitional.__new__(
2200
ClientDBusTransitional)
2201
tcp_server.clients[client_name] = new_client
2202
new_client.bus = bus
2203
for name, value in client.iteritems():
2204
setattr(new_client, name, value)
2205
new_client._approvals_pending = 0
2206
new_client.add_to_dbus()
2207
else:
2208
tcp_server.clients[client_name] = Client.__new__(Client)
2209
for name, value in client.iteritems():
2210
setattr(tcp_server.clients[client_name], name, value)
2211
2212
tcp_server.clients[client_name].decrypt_secret(
2213
client_settings[client_name]["secret"])
2214
2215
# Create/remove clients based on new changes made to config
2216
for clientname in set(old_client_settings) - set(client_settings):
2217
del tcp_server.clients[clientname]
2218
for clientname in set(client_settings) - set(old_client_settings):
2219
tcp_server.clients[clientname] = client_class(name
2220
= clientname,
2221
config =
2222
client_settings
2223
[clientname])
2671
2224
2672
2225
if not tcp_server.clients:
2673
2226
logger.warning("No clients defined")
2674
2675
if not foreground:
2676
if pidfile is not None:
2677
try:
2678
with pidfile:
2679
pid = os.getpid()
2680
pidfile.write(str(pid) + "\n".encode("utf-8"))
2681
except IOError:
2682
logger.error("Could not write to file %r with PID %d",
2683
pidfilename, pid)
2684
del pidfile
2227
2228
if not debug:
2229
try:
2230
with pidfile:
2231
pid = os.getpid()
2232
pidfile.write(str(pid) + "\n".encode("utf-8"))
2233
del pidfile
2234
except IOError:
2235
logger.error("Could not write to file %r with PID %d",
2236
pidfilename, pid)
2237
except NameError:
2238
# "pidfile" was never created
2239
pass
2685
2240
del pidfilename
2241
2242
signal.signal(signal.SIGINT, signal.SIG_IGN)
2686
2243
2687
2244
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2688
2245
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2689
2246
2690
2247
if use_dbus:
2691
@alternate_dbus_interfaces({"se.recompile.Mandos":
2692
"se.bsnet.fukt.Mandos"})
2693
class MandosDBusService(DBusObjectWithProperties):
2248
class MandosDBusService(dbus.service.Object):
2694
2249
"""A D-Bus proxy object"""
2695
2250
def __init__(self):
2696
2251
dbus.service.Object.__init__(self, bus, "/")
2697
2252
_interface = "se.recompile.Mandos"
2698
2253
2699
@dbus_interface_annotations(_interface)
2700
def _foo(self):
2701
return { "org.freedesktop.DBus.Property"
2702
".EmitsChangedSignal":
2703
"false"}
2704
2705
2254
@dbus.service.signal(_interface, signature="o")
2706
2255
def ClientAdded(self, objpath):
2707
2256
"D-Bus signal"
2749
2298
2750
2299
del _interface
2751
2300
2752
mandos_dbus_service = MandosDBusService()
2301
class MandosDBusServiceTransitional(MandosDBusService):
2302
__metaclass__ = AlternateDBusNamesMetaclass
2303
mandos_dbus_service = MandosDBusServiceTransitional()
2753
2304
2754
2305
def cleanup():
2755
2306
"Cleanup function; run on exit"
2756
if zeroconf:
2757
service.cleanup()
2307
service.cleanup()
2758
2308
2759
2309
multiprocessing.active_children()
2760
wnull.close()
2761
2310
if not (tcp_server.clients or client_settings):
2762
2311
return
2763
2312
2764
2313
# Store client before exiting. Secrets are encrypted with key
2765
2314
# based on what config file has. If config file is
2766
2315
# removed/edited, old secret will thus be unrecovable.
2767
clients = {}
2768
with PGPEngine() as pgp:
2769
for client in tcp_server.clients.itervalues():
2770
key = client_settings[client.name]["secret"]
2771
client.encrypted_secret = pgp.encrypt(client.secret,
2772
key)
2773
client_dict = {}
2774
2775
# A list of attributes that can not be pickled
2776
# + secret.
2777
exclude = set(("bus", "changedstate", "secret",
2778
"checker", "server_settings"))
2779
for name, typ in (inspect.getmembers
2780
(dbus.service.Object)):
2781
exclude.add(name)
2782
2783
client_dict["encrypted_secret"] = (client
2784
.encrypted_secret)
2785
for attr in client.client_structure:
2786
if attr not in exclude:
2787
client_dict[attr] = getattr(client, attr)
2788
2789
clients[client.name] = client_dict
2790
del client_settings[client.name]["secret"]
2791
2316
clients = []
2317
for client in tcp_server.clients.itervalues():
2318
client.encrypt_secret(
2319
client_settings[client.name]["secret"])
2320
2321
client_dict = {}
2322
2323
# A list of attributes that will not be stored when
2324
# shutting down.
2325
exclude = set(("bus", "changedstate", "secret"))
2326
for name, typ in inspect.getmembers(dbus.service.Object):
2327
exclude.add(name)
2328
2329
client_dict["encrypted_secret"] = client.encrypted_secret
2330
for attr in client.client_structure:
2331
if attr not in exclude:
2332
client_dict[attr] = getattr(client, attr)
2333
2334
clients.append(client_dict)
2335
del client_settings[client.name]["secret"]
2336
2792
2337
try:
2793
with (tempfile.NamedTemporaryFile
2794
(mode='wb', suffix=".pickle", prefix='clients-',
2795
dir=os.path.dirname(stored_state_path),
2796
delete=False)) as stored_state:
2338
with os.fdopen(os.open(stored_state_path,
2339
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2340
stat.S_IRUSR | stat.S_IWUSR),
2341
"wb") as stored_state:
2797
2342
pickle.dump((clients, client_settings), stored_state)
2798
tempname=stored_state.name
2799
os.rename(tempname, stored_state_path)
2800
except (IOError, OSError) as e:
2801
if not debug:
2802
try:
2803
os.remove(tempname)
2804
except NameError:
2805
pass
2806
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2807
logger.warning("Could not save persistent state: {0}"
2808
.format(os.strerror(e.errno)))
2809
else:
2810
logger.warning("Could not save persistent state:",
2811
exc_info=e)
2343
except IOError as e:
2344
logger.warning("Could not save persistant state: {0}"
2345
.format(e))
2346
if e.errno != errno.ENOENT:
2812
2347
raise
2813
2348
2814
2349
# Delete all clients, and settings from config
2815
2350
while tcp_server.clients:
2816
2351
name, client = tcp_server.clients.popitem()
2834
2369
# Need to initiate checking of clients
2835
2370
if client.enabled:
2836
2371
client.init_checker()
2372
2837
2373
2838
2374
tcp_server.enable()
2839
2375
tcp_server.server_activate()
2840
2376
2841
2377
# Find out what port we got
2842
if zeroconf:
2843
service.port = tcp_server.socket.getsockname()[1]
2378
service.port = tcp_server.socket.getsockname()[1]
2844
2379
if use_ipv6:
2845
2380
logger.info("Now listening on address %r, port %d,"
2846
" flowinfo %d, scope_id %d",
2847
*tcp_server.socket.getsockname())
2381
" flowinfo %d, scope_id %d"
2382
% tcp_server.socket.getsockname())
2848
2383
else: # IPv4
2849
logger.info("Now listening on address %r, port %d",
2850
*tcp_server.socket.getsockname())
2384
logger.info("Now listening on address %r, port %d"
2385
% tcp_server.socket.getsockname())
2851
2386
2852
2387
#service.interface = tcp_server.socket.getsockname()[3]
2853
2388
2854
2389
try:
2855
if zeroconf:
2856
# From the Avahi example code
2857
try:
2858
service.activate()
2859
except dbus.exceptions.DBusException as error:
2860
logger.critical("D-Bus Exception", exc_info=error)
2861
cleanup()
2862
sys.exit(1)
2863
# End of Avahi example code
2390
# From the Avahi example code
2391
try:
2392
service.activate()
2393
except dbus.exceptions.DBusException as error:
2394
logger.critical("DBusException: %s", error)
2395
cleanup()
2396
sys.exit(1)
2397
# End of Avahi example code
2864
2398
2865
2399
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2866
2400
lambda *args, **kwargs:
2870
2404
logger.debug("Starting main loop")
2871
2405
main_loop.run()
2872
2406
except AvahiError as error:
2873
logger.critical("Avahi Error", exc_info=error)
2407
logger.critical("AvahiError: %s", error)
2874
2408
cleanup()
2875
2409
sys.exit(1)
2876
2410
except KeyboardInterrupt:
2881
2415
# Must run before the D-Bus bus name gets deregistered
2882
2416
cleanup()
2883
2417
2418
2884
2419
if __name__ == '__main__':
2885
2420
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0