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- Committer: Teddy Hogeborn
- Date: 2013-12-15 22:21:28 UTC
- Revision ID: teddy@recompile.se-20131215222128-k6f1wbl6lv4v0kd8
Suppress spurious warnings when needed.
* plugin-runner.c (main): Suppress warning by -Wsign-conversion
generated by FD_SET, FD_CLR and FD_ISSET in
GNU libc before version 2.16.
* plugins.d/mandos-client.c (start_mandos_communication): Suppress
warning by -Wstrict-aliasing generated by IN6_IS_ADDR_LINKLOCAL.
* plugin-runner.c (main): Suppress warning by -Wsign-conversion
generated by FD_SET, FD_CLR and FD_ISSET in
GNU libc before version 2.16.
* plugins.d/mandos-client.c (start_mandos_communication): Suppress
warning by -Wstrict-aliasing generated by IN6_IS_ADDR_LINKLOCAL.
- files added:
- debian/mandos-client.examples
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
14
# Copyright © 2008-2013 Teddy Hogeborn
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# Copyright © 2008-2013 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
37
39
import SocketServer as socketserver
38
40
import socket
39
41
import argparse
63
65
import cPickle as pickle
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66
import multiprocessing
65
67
import types
68
import binascii
69
import tempfile
70
import itertools
71
import collections
66
72
67
73
import dbus
68
74
import dbus.service
82
88
except ImportError:
83
89
SO_BINDTODEVICE = None
84
90
85
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version = "1.4.0"
87
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
91
version = "1.6.2"
92
stored_state_file = "clients.pickle"
93
94
logger = logging.getLogger()
90
95
syslogger = (logging.handlers.SysLogHandler
91
96
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
97
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
96
logger.addHandler(syslogger)
97
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(console)
98
99
try:
100
if_nametoindex = (ctypes.cdll.LoadLibrary
101
(ctypes.util.find_library("c"))
102
.if_nametoindex)
103
except (OSError, AttributeError):
104
def if_nametoindex(interface):
105
"Get an interface index the hard way, i.e. using fcntl()"
106
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
107
with contextlib.closing(socket.socket()) as s:
108
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
109
struct.pack(str("16s16x"),
110
interface))
111
interface_index = struct.unpack(str("I"),
112
ifreq[16:20])[0]
113
return interface_index
114
115
116
def initlogger(debug, level=logging.WARNING):
117
"""init logger and add loglevel"""
118
119
syslogger.setFormatter(logging.Formatter
120
('Mandos [%(process)d]: %(levelname)s:'
121
' %(message)s'))
122
logger.addHandler(syslogger)
123
124
if debug:
125
console = logging.StreamHandler()
126
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
127
' [%(process)d]:'
128
' %(levelname)s:'
129
' %(message)s'))
130
logger.addHandler(console)
131
logger.setLevel(level)
132
133
134
class PGPError(Exception):
135
"""Exception if encryption/decryption fails"""
136
pass
137
138
139
class PGPEngine(object):
140
"""A simple class for OpenPGP symmetric encryption & decryption"""
141
def __init__(self):
142
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
143
self.gnupgargs = ['--batch',
144
'--home', self.tempdir,
145
'--force-mdc',
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'--quiet',
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'--no-use-agent']
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def __enter__(self):
150
return self
151
152
def __exit__(self, exc_type, exc_value, traceback):
153
self._cleanup()
154
return False
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def __del__(self):
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self._cleanup()
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def _cleanup(self):
160
if self.tempdir is not None:
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# Delete contents of tempdir
162
for root, dirs, files in os.walk(self.tempdir,
163
topdown = False):
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for filename in files:
165
os.remove(os.path.join(root, filename))
166
for dirname in dirs:
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os.rmdir(os.path.join(root, dirname))
168
# Remove tempdir
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os.rmdir(self.tempdir)
170
self.tempdir = None
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172
def password_encode(self, password):
173
# Passphrase can not be empty and can not contain newlines or
174
# NUL bytes. So we prefix it and hex encode it.
175
encoded = b"mandos" + binascii.hexlify(password)
176
if len(encoded) > 2048:
177
# GnuPG can't handle long passwords, so encode differently
178
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
179
.replace(b"\n", b"\\n")
180
.replace(b"\0", b"\\x00"))
181
return encoded
182
183
def encrypt(self, data, password):
184
passphrase = self.password_encode(password)
185
with tempfile.NamedTemporaryFile(dir=self.tempdir
186
) as passfile:
187
passfile.write(passphrase)
188
passfile.flush()
189
proc = subprocess.Popen(['gpg', '--symmetric',
190
'--passphrase-file',
191
passfile.name]
192
+ self.gnupgargs,
193
stdin = subprocess.PIPE,
194
stdout = subprocess.PIPE,
195
stderr = subprocess.PIPE)
196
ciphertext, err = proc.communicate(input = data)
197
if proc.returncode != 0:
198
raise PGPError(err)
199
return ciphertext
200
201
def decrypt(self, data, password):
202
passphrase = self.password_encode(password)
203
with tempfile.NamedTemporaryFile(dir = self.tempdir
204
) as passfile:
205
passfile.write(passphrase)
206
passfile.flush()
207
proc = subprocess.Popen(['gpg', '--decrypt',
208
'--passphrase-file',
209
passfile.name]
210
+ self.gnupgargs,
211
stdin = subprocess.PIPE,
212
stdout = subprocess.PIPE,
213
stderr = subprocess.PIPE)
214
decrypted_plaintext, err = proc.communicate(input
215
= data)
216
if proc.returncode != 0:
217
raise PGPError(err)
218
return decrypted_plaintext
219
103
220
104
221
class AvahiError(Exception):
105
222
def __init__(self, value, *args, **kwargs):
123
240
Used to optionally bind to the specified interface.
124
241
name: string; Example: 'Mandos'
125
242
type: string; Example: '_mandos._tcp'.
126
See <http://www.dns-sd.org/ServiceTypes.html>
243
See <https://www.iana.org/assignments/service-names-port-numbers>
127
244
port: integer; what port to announce
128
245
TXT: list of strings; TXT record for the service
129
246
domain: string; Domain to publish on, default to .local if empty.
135
252
server: D-Bus Server
136
253
bus: dbus.SystemBus()
137
254
"""
255
138
256
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
139
257
servicetype = None, port = None, TXT = None,
140
258
domain = "", host = "", max_renames = 32768,
153
271
self.server = None
154
272
self.bus = bus
155
273
self.entry_group_state_changed_match = None
274
156
275
def rename(self):
157
276
"""Derived from the Avahi example code"""
158
277
if self.rename_count >= self.max_renames:
164
283
.GetAlternativeServiceName(self.name))
165
284
logger.info("Changing Zeroconf service name to %r ...",
166
285
self.name)
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
169
' %%(levelname)s: %%(message)s'
170
% self.name))
171
286
self.remove()
172
287
try:
173
288
self.add()
174
289
except dbus.exceptions.DBusException as error:
175
logger.critical("DBusException: %s", error)
290
logger.critical("D-Bus Exception", exc_info=error)
176
291
self.cleanup()
177
292
os._exit(1)
178
293
self.rename_count += 1
294
179
295
def remove(self):
180
296
"""Derived from the Avahi example code"""
181
297
if self.entry_group_state_changed_match is not None:
183
299
self.entry_group_state_changed_match = None
184
300
if self.group is not None:
185
301
self.group.Reset()
302
186
303
def add(self):
187
304
"""Derived from the Avahi example code"""
188
305
self.remove()
193
310
avahi.DBUS_INTERFACE_ENTRY_GROUP)
194
311
self.entry_group_state_changed_match = (
195
312
self.group.connect_to_signal(
196
'StateChanged', self .entry_group_state_changed))
313
'StateChanged', self.entry_group_state_changed))
197
314
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
198
315
self.name, self.type)
199
316
self.group.AddService(
205
322
dbus.UInt16(self.port),
206
323
avahi.string_array_to_txt_array(self.TXT))
207
324
self.group.Commit()
325
208
326
def entry_group_state_changed(self, state, error):
209
327
"""Derived from the Avahi example code"""
210
328
logger.debug("Avahi entry group state change: %i", state)
217
335
elif state == avahi.ENTRY_GROUP_FAILURE:
218
336
logger.critical("Avahi: Error in group state changed %s",
219
337
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
338
raise AvahiGroupError("State changed: {0!s}"
339
.format(error))
340
222
341
def cleanup(self):
223
342
"""Derived from the Avahi example code"""
224
343
if self.group is not None:
225
344
try:
226
345
self.group.Free()
227
346
except (dbus.exceptions.UnknownMethodException,
228
dbus.exceptions.DBusException) as e:
347
dbus.exceptions.DBusException):
229
348
pass
230
349
self.group = None
231
350
self.remove()
351
232
352
def server_state_changed(self, state, error=None):
233
353
"""Derived from the Avahi example code"""
234
354
logger.debug("Avahi server state change: %i", state)
253
373
logger.debug("Unknown state: %r", state)
254
374
else:
255
375
logger.debug("Unknown state: %r: %r", state, error)
376
256
377
def activate(self):
257
378
"""Derived from the Avahi example code"""
258
379
if self.server is None:
266
387
self.server_state_changed(self.server.GetState())
267
388
268
389
269
def _timedelta_to_milliseconds(td):
390
class AvahiServiceToSyslog(AvahiService):
391
def rename(self):
392
"""Add the new name to the syslog messages"""
393
ret = AvahiService.rename(self)
394
syslogger.setFormatter(logging.Formatter
395
('Mandos ({0}) [%(process)d]:'
396
' %(levelname)s: %(message)s'
397
.format(self.name)))
398
return ret
399
400
401
def timedelta_to_milliseconds(td):
270
402
"Convert a datetime.timedelta() to milliseconds"
271
403
return ((td.days * 24 * 60 * 60 * 1000)
272
404
+ (td.seconds * 1000)
273
405
+ (td.microseconds // 1000))
274
406
407
275
408
class Client(object):
276
409
"""A representation of a client host served by this server.
277
410
278
411
Attributes:
279
_approved: bool(); 'None' if not yet approved/disapproved
412
approved: bool(); 'None' if not yet approved/disapproved
280
413
approval_delay: datetime.timedelta(); Time to wait for approval
281
414
approval_duration: datetime.timedelta(); Duration of one approval
282
415
checker: subprocess.Popen(); a running checker process used
289
422
instance %(name)s can be used in the command.
290
423
checker_initiator_tag: a gobject event source tag, or None
291
424
created: datetime.datetime(); (UTC) object creation
425
client_structure: Object describing what attributes a client has
426
and is used for storing the client at exit
292
427
current_checker_command: string; current running checker_command
293
disable_hook: If set, called by disable() as disable_hook(self)
294
428
disable_initiator_tag: a gobject event source tag, or None
295
429
enabled: bool()
296
430
fingerprint: string (40 or 32 hexadecimal digits); used to
299
433
interval: datetime.timedelta(); How often to start a new checker
300
434
last_approval_request: datetime.datetime(); (UTC) or None
301
435
last_checked_ok: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
436
last_checker_status: integer between 0 and 255 reflecting exit
437
status of last checker. -1 reflects crashed
438
checker, -2 means no checker completed yet.
439
last_enabled: datetime.datetime(); (UTC) or None
303
440
name: string; from the config file, used in log messages and
304
441
D-Bus identifiers
305
442
secret: bytestring; sent verbatim (over TLS) to client
306
443
timeout: datetime.timedelta(); How long from last_checked_ok
307
444
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
445
extended_timeout: extra long timeout when secret has been sent
309
446
runtime_expansions: Allowed attributes for runtime expansion.
310
447
expires: datetime.datetime(); time (UTC) when a client will be
311
448
disabled, or None
449
server_settings: The server_settings dict from main()
312
450
"""
313
451
314
452
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
453
"created", "enabled", "expires",
454
"fingerprint", "host", "interval",
455
"last_approval_request", "last_checked_ok",
317
456
"last_enabled", "name", "timeout")
457
client_defaults = { "timeout": "PT5M",
458
"extended_timeout": "PT15M",
459
"interval": "PT2M",
460
"checker": "fping -q -- %%(host)s",
461
"host": "",
462
"approval_delay": "PT0S",
463
"approval_duration": "PT1S",
464
"approved_by_default": "True",
465
"enabled": "True",
466
}
318
467
319
468
def timeout_milliseconds(self):
320
469
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
470
return timedelta_to_milliseconds(self.timeout)
322
471
323
472
def extended_timeout_milliseconds(self):
324
473
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
474
return timedelta_to_milliseconds(self.extended_timeout)
326
475
327
476
def interval_milliseconds(self):
328
477
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
478
return timedelta_to_milliseconds(self.interval)
330
479
331
480
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
333
334
def __init__(self, name = None, disable_hook=None, config=None):
335
"""Note: the 'checker' key in 'config' sets the
336
'checker_command' attribute and *not* the 'checker'
337
attribute."""
481
return timedelta_to_milliseconds(self.approval_delay)
482
483
@staticmethod
484
def config_parser(config):
485
"""Construct a new dict of client settings of this form:
486
{ client_name: {setting_name: value, ...}, ...}
487
with exceptions for any special settings as defined above.
488
NOTE: Must be a pure function. Must return the same result
489
value given the same arguments.
490
"""
491
settings = {}
492
for client_name in config.sections():
493
section = dict(config.items(client_name))
494
client = settings[client_name] = {}
495
496
client["host"] = section["host"]
497
# Reformat values from string types to Python types
498
client["approved_by_default"] = config.getboolean(
499
client_name, "approved_by_default")
500
client["enabled"] = config.getboolean(client_name,
501
"enabled")
502
503
client["fingerprint"] = (section["fingerprint"].upper()
504
.replace(" ", ""))
505
if "secret" in section:
506
client["secret"] = section["secret"].decode("base64")
507
elif "secfile" in section:
508
with open(os.path.expanduser(os.path.expandvars
509
(section["secfile"])),
510
"rb") as secfile:
511
client["secret"] = secfile.read()
512
else:
513
raise TypeError("No secret or secfile for section {0}"
514
.format(section))
515
client["timeout"] = string_to_delta(section["timeout"])
516
client["extended_timeout"] = string_to_delta(
517
section["extended_timeout"])
518
client["interval"] = string_to_delta(section["interval"])
519
client["approval_delay"] = string_to_delta(
520
section["approval_delay"])
521
client["approval_duration"] = string_to_delta(
522
section["approval_duration"])
523
client["checker_command"] = section["checker"]
524
client["last_approval_request"] = None
525
client["last_checked_ok"] = None
526
client["last_checker_status"] = -2
527
528
return settings
529
530
def __init__(self, settings, name = None, server_settings=None):
338
531
self.name = name
339
if config is None:
340
config = {}
532
if server_settings is None:
533
server_settings = {}
534
self.server_settings = server_settings
535
# adding all client settings
536
for setting, value in settings.iteritems():
537
setattr(self, setting, value)
538
539
if self.enabled:
540
if not hasattr(self, "last_enabled"):
541
self.last_enabled = datetime.datetime.utcnow()
542
if not hasattr(self, "expires"):
543
self.expires = (datetime.datetime.utcnow()
544
+ self.timeout)
545
else:
546
self.last_enabled = None
547
self.expires = None
548
341
549
logger.debug("Creating client %r", self.name)
342
550
# Uppercase and remove spaces from fingerprint for later
343
551
# comparison purposes with return value from the fingerprint()
344
552
# function
345
self.fingerprint = (config["fingerprint"].upper()
346
.replace(" ", ""))
347
553
logger.debug(" Fingerprint: %s", self.fingerprint)
348
if "secret" in config:
349
self.secret = config["secret"].decode("base64")
350
elif "secfile" in config:
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
353
"rb") as secfile:
354
self.secret = secfile.read()
355
else:
356
raise TypeError("No secret or secfile for client %s"
357
% self.name)
358
self.host = config.get("host", "")
359
self.created = datetime.datetime.utcnow()
360
self.enabled = False
361
self.last_approval_request = None
362
self.last_enabled = None
363
self.last_checked_ok = None
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
367
self.interval = string_to_delta(config["interval"])
368
self.disable_hook = disable_hook
554
self.created = settings.get("created",
555
datetime.datetime.utcnow())
556
557
# attributes specific for this server instance
369
558
self.checker = None
370
559
self.checker_initiator_tag = None
371
560
self.disable_initiator_tag = None
372
self.expires = None
373
561
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
375
562
self.current_checker_command = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
379
True)
563
self.approved = None
380
564
self.approvals_pending = 0
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
565
self.changedstate = (multiprocessing_manager
386
566
.Condition(multiprocessing_manager
387
567
.Lock()))
568
self.client_structure = [attr for attr in
569
self.__dict__.iterkeys()
570
if not attr.startswith("_")]
571
self.client_structure.append("client_structure")
572
573
for name, t in inspect.getmembers(type(self),
574
lambda obj:
575
isinstance(obj,
576
property)):
577
if not name.startswith("_"):
578
self.client_structure.append(name)
388
579
580
# Send notice to process children that client state has changed
389
581
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
582
with self.changedstate:
583
self.changedstate.notify_all()
393
584
394
585
def enable(self):
395
586
"""Start this client's checker and timeout hooks"""
396
587
if getattr(self, "enabled", False):
397
588
# Already enabled
398
589
return
590
self.expires = datetime.datetime.utcnow() + self.timeout
591
self.enabled = True
592
self.last_enabled = datetime.datetime.utcnow()
593
self.init_checker()
399
594
self.send_changedstate()
595
596
def disable(self, quiet=True):
597
"""Disable this client."""
598
if not getattr(self, "enabled", False):
599
return False
600
if not quiet:
601
logger.info("Disabling client %s", self.name)
602
if getattr(self, "disable_initiator_tag", None) is not None:
603
gobject.source_remove(self.disable_initiator_tag)
604
self.disable_initiator_tag = None
605
self.expires = None
606
if getattr(self, "checker_initiator_tag", None) is not None:
607
gobject.source_remove(self.checker_initiator_tag)
608
self.checker_initiator_tag = None
609
self.stop_checker()
610
self.enabled = False
611
if not quiet:
612
self.send_changedstate()
613
# Do not run this again if called by a gobject.timeout_add
614
return False
615
616
def __del__(self):
617
self.disable()
618
619
def init_checker(self):
400
620
# Schedule a new checker to be started an 'interval' from now,
401
621
# and every interval from then on.
622
if self.checker_initiator_tag is not None:
623
gobject.source_remove(self.checker_initiator_tag)
402
624
self.checker_initiator_tag = (gobject.timeout_add
403
625
(self.interval_milliseconds(),
404
626
self.start_checker))
405
627
# Schedule a disable() when 'timeout' has passed
406
self.expires = datetime.datetime.utcnow() + self.timeout
628
if self.disable_initiator_tag is not None:
629
gobject.source_remove(self.disable_initiator_tag)
407
630
self.disable_initiator_tag = (gobject.timeout_add
408
631
(self.timeout_milliseconds(),
409
632
self.disable))
410
self.enabled = True
411
self.last_enabled = datetime.datetime.utcnow()
412
633
# Also start a new checker *right now*.
413
634
self.start_checker()
414
635
415
def disable(self, quiet=True):
416
"""Disable this client."""
417
if not getattr(self, "enabled", False):
418
return False
419
if not quiet:
420
self.send_changedstate()
421
if not quiet:
422
logger.info("Disabling client %s", self.name)
423
if getattr(self, "disable_initiator_tag", False):
424
gobject.source_remove(self.disable_initiator_tag)
425
self.disable_initiator_tag = None
426
self.expires = None
427
if getattr(self, "checker_initiator_tag", False):
428
gobject.source_remove(self.checker_initiator_tag)
429
self.checker_initiator_tag = None
430
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
433
self.enabled = False
434
# Do not run this again if called by a gobject.timeout_add
435
return False
436
437
def __del__(self):
438
self.disable_hook = None
439
self.disable()
440
441
636
def checker_callback(self, pid, condition, command):
442
637
"""The checker has completed, so take appropriate actions."""
443
638
self.checker_callback_tag = None
444
639
self.checker = None
445
640
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
641
self.last_checker_status = os.WEXITSTATUS(condition)
642
if self.last_checker_status == 0:
448
643
logger.info("Checker for %(name)s succeeded",
449
644
vars(self))
450
645
self.checked_ok()
452
647
logger.info("Checker for %(name)s failed",
453
648
vars(self))
454
649
else:
650
self.last_checker_status = -1
455
651
logger.warning("Checker for %(name)s crashed?",
456
652
vars(self))
457
653
458
def checked_ok(self, timeout=None):
459
"""Bump up the timeout for this client.
460
461
This should only be called when the client has been seen,
462
alive and well.
463
"""
654
def checked_ok(self):
655
"""Assert that the client has been seen, alive and well."""
656
self.last_checked_ok = datetime.datetime.utcnow()
657
self.last_checker_status = 0
658
self.bump_timeout()
659
660
def bump_timeout(self, timeout=None):
661
"""Bump up the timeout for this client."""
464
662
if timeout is None:
465
663
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
gobject.source_remove(self.disable_initiator_tag)
468
self.disable_initiator_tag = (gobject.timeout_add
469
(_timedelta_to_milliseconds
470
(timeout), self.disable))
471
self.expires = datetime.datetime.utcnow() + timeout
664
if self.disable_initiator_tag is not None:
665
gobject.source_remove(self.disable_initiator_tag)
666
self.disable_initiator_tag = None
667
if getattr(self, "enabled", False):
668
self.disable_initiator_tag = (gobject.timeout_add
669
(timedelta_to_milliseconds
670
(timeout), self.disable))
671
self.expires = datetime.datetime.utcnow() + timeout
472
672
473
673
def need_approval(self):
474
674
self.last_approval_request = datetime.datetime.utcnow()
479
679
If a checker already exists, leave it running and do
480
680
nothing."""
481
681
# The reason for not killing a running checker is that if we
482
# did that, then if a checker (for some reason) started
483
# running slowly and taking more than 'interval' time, the
484
# client would inevitably timeout, since no checker would get
485
# a chance to run to completion. If we instead leave running
682
# did that, and if a checker (for some reason) started running
683
# slowly and taking more than 'interval' time, then the client
684
# would inevitably timeout, since no checker would get a
685
# chance to run to completion. If we instead leave running
486
686
# checkers alone, the checker would have to take more time
487
687
# than 'timeout' for the client to be disabled, which is as it
488
688
# should be.
490
690
# If a checker exists, make sure it is not a zombie
491
691
try:
492
692
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
493
except (AttributeError, OSError) as error:
494
if (isinstance(error, OSError)
495
and error.errno != errno.ECHILD):
496
raise error
693
except AttributeError:
694
pass
695
except OSError as error:
696
if error.errno != errno.ECHILD:
697
raise
497
698
else:
498
699
if pid:
499
700
logger.warning("Checker was a zombie")
502
703
self.current_checker_command)
503
704
# Start a new checker if needed
504
705
if self.checker is None:
706
# Escape attributes for the shell
707
escaped_attrs = dict(
708
(attr, re.escape(unicode(getattr(self, attr))))
709
for attr in
710
self.runtime_expansions)
505
711
try:
506
# In case checker_command has exactly one % operator
507
command = self.checker_command % self.host
508
except TypeError:
509
# Escape attributes for the shell
510
escaped_attrs = dict(
511
(attr,
512
re.escape(unicode(str(getattr(self, attr, "")),
513
errors=
514
'replace')))
515
for attr in
516
self.runtime_expansions)
517
518
try:
519
command = self.checker_command % escaped_attrs
520
except TypeError as error:
521
logger.error('Could not format string "%s":'
522
' %s', self.checker_command, error)
523
return True # Try again later
712
command = self.checker_command % escaped_attrs
713
except TypeError as error:
714
logger.error('Could not format string "%s"',
715
self.checker_command, exc_info=error)
716
return True # Try again later
524
717
self.current_checker_command = command
525
718
try:
526
719
logger.info("Starting checker %r for %s",
529
722
# in normal mode, that is already done by daemon(),
530
723
# and in debug mode we don't want to. (Stdin is
531
724
# always replaced by /dev/null.)
725
# The exception is when not debugging but nevertheless
726
# running in the foreground; use the previously
727
# created wnull.
728
popen_args = {}
729
if (not self.server_settings["debug"]
730
and self.server_settings["foreground"]):
731
popen_args.update({"stdout": wnull,
732
"stderr": wnull })
532
733
self.checker = subprocess.Popen(command,
533
734
close_fds=True,
534
shell=True, cwd="/")
535
self.checker_callback_tag = (gobject.child_watch_add
536
(self.checker.pid,
537
self.checker_callback,
538
data=command))
539
# The checker may have completed before the gobject
540
# watch was added. Check for this.
735
shell=True, cwd="/",
736
**popen_args)
737
except OSError as error:
738
logger.error("Failed to start subprocess",
739
exc_info=error)
740
return True
741
self.checker_callback_tag = (gobject.child_watch_add
742
(self.checker.pid,
743
self.checker_callback,
744
data=command))
745
# The checker may have completed before the gobject
746
# watch was added. Check for this.
747
try:
541
748
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
542
if pid:
543
gobject.source_remove(self.checker_callback_tag)
544
self.checker_callback(pid, status, command)
545
749
except OSError as error:
546
logger.error("Failed to start subprocess: %s",
547
error)
750
if error.errno == errno.ECHILD:
751
# This should never happen
752
logger.error("Child process vanished",
753
exc_info=error)
754
return True
755
raise
756
if pid:
757
gobject.source_remove(self.checker_callback_tag)
758
self.checker_callback(pid, status, command)
548
759
# Re-run this periodically if run by gobject.timeout_add
549
760
return True
550
761
557
768
return
558
769
logger.debug("Stopping checker for %(name)s", vars(self))
559
770
try:
560
os.kill(self.checker.pid, signal.SIGTERM)
771
self.checker.terminate()
561
772
#time.sleep(0.5)
562
773
#if self.checker.poll() is None:
563
# os.kill(self.checker.pid, signal.SIGKILL)
774
# self.checker.kill()
564
775
except OSError as error:
565
776
if error.errno != errno.ESRCH: # No such process
566
777
raise
583
794
# "Set" method, so we fail early here:
584
795
if byte_arrays and signature != "ay":
585
796
raise ValueError("Byte arrays not supported for non-'ay'"
586
" signature %r" % signature)
797
" signature {0!r}".format(signature))
587
798
def decorator(func):
588
799
func._dbus_is_property = True
589
800
func._dbus_interface = dbus_interface
597
808
return decorator
598
809
599
810
811
def dbus_interface_annotations(dbus_interface):
812
"""Decorator for marking functions returning interface annotations
813
814
Usage:
815
816
@dbus_interface_annotations("org.example.Interface")
817
def _foo(self): # Function name does not matter
818
return {"org.freedesktop.DBus.Deprecated": "true",
819
"org.freedesktop.DBus.Property.EmitsChangedSignal":
820
"false"}
821
"""
822
def decorator(func):
823
func._dbus_is_interface = True
824
func._dbus_interface = dbus_interface
825
func._dbus_name = dbus_interface
826
return func
827
return decorator
828
829
830
def dbus_annotations(annotations):
831
"""Decorator to annotate D-Bus methods, signals or properties
832
Usage:
833
834
@dbus_service_property("org.example.Interface", signature="b",
835
access="r")
836
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
837
"org.freedesktop.DBus.Property."
838
"EmitsChangedSignal": "false"})
839
def Property_dbus_property(self):
840
return dbus.Boolean(False)
841
"""
842
def decorator(func):
843
func._dbus_annotations = annotations
844
return func
845
return decorator
846
847
600
848
class DBusPropertyException(dbus.exceptions.DBusException):
601
849
"""A base class for D-Bus property-related exceptions
602
850
"""
625
873
"""
626
874
627
875
@staticmethod
628
def _is_dbus_property(obj):
629
return getattr(obj, "_dbus_is_property", False)
876
def _is_dbus_thing(thing):
877
"""Returns a function testing if an attribute is a D-Bus thing
878
879
If called like _is_dbus_thing("method") it returns a function
880
suitable for use as predicate to inspect.getmembers().
881
"""
882
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
883
False)
630
884
631
def _get_all_dbus_properties(self):
885
def _get_all_dbus_things(self, thing):
632
886
"""Returns a generator of (name, attribute) pairs
633
887
"""
634
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
888
return ((getattr(athing.__get__(self), "_dbus_name",
889
name),
890
athing.__get__(self))
635
891
for cls in self.__class__.__mro__
636
for name, prop in
637
inspect.getmembers(cls, self._is_dbus_property))
892
for name, athing in
893
inspect.getmembers(cls,
894
self._is_dbus_thing(thing)))
638
895
639
896
def _get_dbus_property(self, interface_name, property_name):
640
897
"""Returns a bound method if one exists which is a D-Bus
642
899
"""
643
900
for cls in self.__class__.__mro__:
644
901
for name, value in (inspect.getmembers
645
(cls, self._is_dbus_property)):
902
(cls,
903
self._is_dbus_thing("property"))):
646
904
if (value._dbus_name == property_name
647
905
and value._dbus_interface == interface_name):
648
906
return value.__get__(self)
677
935
# signatures other than "ay".
678
936
if prop._dbus_signature != "ay":
679
937
raise ValueError
680
value = dbus.ByteArray(''.join(unichr(byte)
681
for byte in value))
938
value = dbus.ByteArray(b''.join(chr(byte)
939
for byte in value))
682
940
prop(value)
683
941
684
942
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
689
947
690
948
Note: Will not include properties with access="write".
691
949
"""
692
all = {}
693
for name, prop in self._get_all_dbus_properties():
950
properties = {}
951
for name, prop in self._get_all_dbus_things("property"):
694
952
if (interface_name
695
953
and interface_name != prop._dbus_interface):
696
954
# Interface non-empty but did not match
700
958
continue
701
959
value = prop()
702
960
if not hasattr(value, "variant_level"):
703
all[name] = value
961
properties[name] = value
704
962
continue
705
all[name] = type(value)(value, variant_level=
706
value.variant_level+1)
707
return dbus.Dictionary(all, signature="sv")
963
properties[name] = type(value)(value, variant_level=
964
value.variant_level+1)
965
return dbus.Dictionary(properties, signature="sv")
708
966
709
967
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
710
968
out_signature="s",
711
969
path_keyword='object_path',
712
970
connection_keyword='connection')
713
971
def Introspect(self, object_path, connection):
714
"""Standard D-Bus method, overloaded to insert property tags.
972
"""Overloading of standard D-Bus method.
973
974
Inserts property tags and interface annotation tags.
715
975
"""
716
976
xmlstring = dbus.service.Object.Introspect(self, object_path,
717
977
connection)
724
984
e.setAttribute("access", prop._dbus_access)
725
985
return e
726
986
for if_tag in document.getElementsByTagName("interface"):
987
# Add property tags
727
988
for tag in (make_tag(document, name, prop)
728
989
for name, prop
729
in self._get_all_dbus_properties()
990
in self._get_all_dbus_things("property")
730
991
if prop._dbus_interface
731
992
== if_tag.getAttribute("name")):
732
993
if_tag.appendChild(tag)
994
# Add annotation tags
995
for typ in ("method", "signal", "property"):
996
for tag in if_tag.getElementsByTagName(typ):
997
annots = dict()
998
for name, prop in (self.
999
_get_all_dbus_things(typ)):
1000
if (name == tag.getAttribute("name")
1001
and prop._dbus_interface
1002
== if_tag.getAttribute("name")):
1003
annots.update(getattr
1004
(prop,
1005
"_dbus_annotations",
1006
{}))
1007
for name, value in annots.iteritems():
1008
ann_tag = document.createElement(
1009
"annotation")
1010
ann_tag.setAttribute("name", name)
1011
ann_tag.setAttribute("value", value)
1012
tag.appendChild(ann_tag)
1013
# Add interface annotation tags
1014
for annotation, value in dict(
1015
itertools.chain.from_iterable(
1016
annotations().iteritems()
1017
for name, annotations in
1018
self._get_all_dbus_things("interface")
1019
if name == if_tag.getAttribute("name")
1020
)).iteritems():
1021
ann_tag = document.createElement("annotation")
1022
ann_tag.setAttribute("name", annotation)
1023
ann_tag.setAttribute("value", value)
1024
if_tag.appendChild(ann_tag)
733
1025
# Add the names to the return values for the
734
1026
# "org.freedesktop.DBus.Properties" methods
735
1027
if (if_tag.getAttribute("name")
750
1042
except (AttributeError, xml.dom.DOMException,
751
1043
xml.parsers.expat.ExpatError) as error:
752
1044
logger.error("Failed to override Introspection method",
753
error)
1045
exc_info=error)
754
1046
return xmlstring
755
1047
756
1048
757
def datetime_to_dbus (dt, variant_level=0):
1049
def datetime_to_dbus(dt, variant_level=0):
758
1050
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
1051
if dt is None:
760
1052
return dbus.String("", variant_level = variant_level)
761
1053
return dbus.String(dt.isoformat(),
762
1054
variant_level=variant_level)
763
1055
764
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
765
.__metaclass__):
766
"""Applied to an empty subclass of a D-Bus object, this metaclass
767
will add additional D-Bus attributes matching a certain pattern.
1056
1057
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1058
"""A class decorator; applied to a subclass of
1059
dbus.service.Object, it will add alternate D-Bus attributes with
1060
interface names according to the "alt_interface_names" mapping.
1061
Usage:
1062
1063
@alternate_dbus_interfaces({"org.example.Interface":
1064
"net.example.AlternateInterface"})
1065
class SampleDBusObject(dbus.service.Object):
1066
@dbus.service.method("org.example.Interface")
1067
def SampleDBusMethod():
1068
pass
1069
1070
The above "SampleDBusMethod" on "SampleDBusObject" will be
1071
reachable via two interfaces: "org.example.Interface" and
1072
"net.example.AlternateInterface", the latter of which will have
1073
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1074
"true", unless "deprecate" is passed with a False value.
1075
1076
This works for methods and signals, and also for D-Bus properties
1077
(from DBusObjectWithProperties) and interfaces (from the
1078
dbus_interface_annotations decorator).
768
1079
"""
769
def __new__(mcs, name, bases, attr):
770
# Go through all the base classes which could have D-Bus
771
# methods, signals, or properties in them
772
for base in (b for b in bases
773
if issubclass(b, dbus.service.Object)):
774
# Go though all attributes of the base class
775
for attrname, attribute in inspect.getmembers(base):
1080
def wrapper(cls):
1081
for orig_interface_name, alt_interface_name in (
1082
alt_interface_names.iteritems()):
1083
attr = {}
1084
interface_names = set()
1085
# Go though all attributes of the class
1086
for attrname, attribute in inspect.getmembers(cls):
776
1087
# Ignore non-D-Bus attributes, and D-Bus attributes
777
1088
# with the wrong interface name
778
1089
if (not hasattr(attribute, "_dbus_interface")
779
1090
or not attribute._dbus_interface
780
.startswith("se.recompile.Mandos")):
1091
.startswith(orig_interface_name)):
781
1092
continue
782
1093
# Create an alternate D-Bus interface name based on
783
1094
# the current name
784
1095
alt_interface = (attribute._dbus_interface
785
.replace("se.recompile.Mandos",
786
"se.bsnet.fukt.Mandos"))
1096
.replace(orig_interface_name,
1097
alt_interface_name))
1098
interface_names.add(alt_interface)
787
1099
# Is this a D-Bus signal?
788
1100
if getattr(attribute, "_dbus_is_signal", False):
789
# Extract the original non-method function by
790
# black magic
1101
# Extract the original non-method undecorated
1102
# function by black magic
791
1103
nonmethod_func = (dict(
792
1104
zip(attribute.func_code.co_freevars,
793
1105
attribute.__closure__))["func"]
804
1116
nonmethod_func.func_name,
805
1117
nonmethod_func.func_defaults,
806
1118
nonmethod_func.func_closure)))
1119
# Copy annotations, if any
1120
try:
1121
new_function._dbus_annotations = (
1122
dict(attribute._dbus_annotations))
1123
except AttributeError:
1124
pass
807
1125
# Define a creator of a function to call both the
808
# old and new functions, so both the old and new
809
# signals gets sent when the function is called
1126
# original and alternate functions, so both the
1127
# original and alternate signals gets sent when
1128
# the function is called
810
1129
def fixscope(func1, func2):
811
1130
"""This function is a scope container to pass
812
1131
func1 and func2 to the "call_both" function
819
1138
return call_both
820
1139
# Create the "call_both" function and add it to
821
1140
# the class
822
attr[attrname] = fixscope(attribute,
823
new_function)
1141
attr[attrname] = fixscope(attribute, new_function)
824
1142
# Is this a D-Bus method?
825
1143
elif getattr(attribute, "_dbus_is_method", False):
826
1144
# Create a new, but exactly alike, function
837
1155
attribute.func_name,
838
1156
attribute.func_defaults,
839
1157
attribute.func_closure)))
1158
# Copy annotations, if any
1159
try:
1160
attr[attrname]._dbus_annotations = (
1161
dict(attribute._dbus_annotations))
1162
except AttributeError:
1163
pass
840
1164
# Is this a D-Bus property?
841
1165
elif getattr(attribute, "_dbus_is_property", False):
842
1166
# Create a new, but exactly alike, function
856
1180
attribute.func_name,
857
1181
attribute.func_defaults,
858
1182
attribute.func_closure)))
859
return type.__new__(mcs, name, bases, attr)
860
1183
# Copy annotations, if any
1184
try:
1185
attr[attrname]._dbus_annotations = (
1186
dict(attribute._dbus_annotations))
1187
except AttributeError:
1188
pass
1189
# Is this a D-Bus interface?
1190
elif getattr(attribute, "_dbus_is_interface", False):
1191
# Create a new, but exactly alike, function
1192
# object. Decorate it to be a new D-Bus interface
1193
# with the alternate D-Bus interface name. Add it
1194
# to the class.
1195
attr[attrname] = (dbus_interface_annotations
1196
(alt_interface)
1197
(types.FunctionType
1198
(attribute.func_code,
1199
attribute.func_globals,
1200
attribute.func_name,
1201
attribute.func_defaults,
1202
attribute.func_closure)))
1203
if deprecate:
1204
# Deprecate all alternate interfaces
1205
iname="_AlternateDBusNames_interface_annotation{0}"
1206
for interface_name in interface_names:
1207
@dbus_interface_annotations(interface_name)
1208
def func(self):
1209
return { "org.freedesktop.DBus.Deprecated":
1210
"true" }
1211
# Find an unused name
1212
for aname in (iname.format(i)
1213
for i in itertools.count()):
1214
if aname not in attr:
1215
attr[aname] = func
1216
break
1217
if interface_names:
1218
# Replace the class with a new subclass of it with
1219
# methods, signals, etc. as created above.
1220
cls = type(b"{0}Alternate".format(cls.__name__),
1221
(cls,), attr)
1222
return cls
1223
return wrapper
1224
1225
1226
@alternate_dbus_interfaces({"se.recompile.Mandos":
1227
"se.bsnet.fukt.Mandos"})
861
1228
class ClientDBus(Client, DBusObjectWithProperties):
862
1229
"""A Client class using D-Bus
863
1230
872
1239
# dbus.service.Object doesn't use super(), so we can't either.
873
1240
874
1241
def __init__(self, bus = None, *args, **kwargs):
875
self._approvals_pending = 0
876
1242
self.bus = bus
877
1243
Client.__init__(self, *args, **kwargs)
878
1244
# Only now, when this client is initialized, can it show up on
884
1250
("/clients/" + client_object_name))
885
1251
DBusObjectWithProperties.__init__(self, self.bus,
886
1252
self.dbus_object_path)
887
1253
888
1254
def notifychangeproperty(transform_func,
889
1255
dbus_name, type_func=lambda x: x,
890
1256
variant_level=1):
891
1257
""" Modify a variable so that it's a property which announces
892
1258
its changes to DBus.
893
1259
894
1260
transform_fun: Function that takes a value and a variant_level
895
1261
and transforms it to a D-Bus type.
896
1262
dbus_name: D-Bus name of the variable
913
1279
914
1280
return property(lambda self: getattr(self, attrname), setter)
915
1281
916
917
1282
expires = notifychangeproperty(datetime_to_dbus, "Expires")
918
1283
approvals_pending = notifychangeproperty(dbus.Boolean,
919
1284
"ApprovalPending",
926
1291
checker is not None)
927
1292
last_checked_ok = notifychangeproperty(datetime_to_dbus,
928
1293
"LastCheckedOK")
1294
last_checker_status = notifychangeproperty(dbus.Int16,
1295
"LastCheckerStatus")
929
1296
last_approval_request = notifychangeproperty(
930
1297
datetime_to_dbus, "LastApprovalRequest")
931
1298
approved_by_default = notifychangeproperty(dbus.Boolean,
932
1299
"ApprovedByDefault")
933
approval_delay = notifychangeproperty(dbus.UInt16,
1300
approval_delay = notifychangeproperty(dbus.UInt64,
934
1301
"ApprovalDelay",
935
1302
type_func =
936
_timedelta_to_milliseconds)
1303
timedelta_to_milliseconds)
937
1304
approval_duration = notifychangeproperty(
938
dbus.UInt16, "ApprovalDuration",
939
type_func = _timedelta_to_milliseconds)
1305
dbus.UInt64, "ApprovalDuration",
1306
type_func = timedelta_to_milliseconds)
940
1307
host = notifychangeproperty(dbus.String, "Host")
941
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1308
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
942
1309
type_func =
943
_timedelta_to_milliseconds)
1310
timedelta_to_milliseconds)
944
1311
extended_timeout = notifychangeproperty(
945
dbus.UInt16, "ExtendedTimeout",
946
type_func = _timedelta_to_milliseconds)
947
interval = notifychangeproperty(dbus.UInt16,
1312
dbus.UInt64, "ExtendedTimeout",
1313
type_func = timedelta_to_milliseconds)
1314
interval = notifychangeproperty(dbus.UInt64,
948
1315
"Interval",
949
1316
type_func =
950
_timedelta_to_milliseconds)
1317
timedelta_to_milliseconds)
951
1318
checker_command = notifychangeproperty(dbus.String, "Checker")
952
1319
953
1320
del notifychangeproperty
995
1362
return r
996
1363
997
1364
def _reset_approved(self):
998
self._approved = None
1365
self.approved = None
999
1366
return False
1000
1367
1001
1368
def approve(self, value=True):
1002
self.send_changedstate()
1003
self._approved = value
1004
gobject.timeout_add(_timedelta_to_milliseconds
1369
self.approved = value
1370
gobject.timeout_add(timedelta_to_milliseconds
1005
1371
(self.approval_duration),
1006
1372
self._reset_approved)
1007
1373
self.send_changedstate()
1008
1374
1009
1375
## D-Bus methods, signals & properties
1010
1376
_interface = "se.recompile.Mandos.Client"
1011
1377
1378
## Interfaces
1379
1380
@dbus_interface_annotations(_interface)
1381
def _foo(self):
1382
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1383
"false"}
1384
1012
1385
## Signals
1013
1386
1014
1387
# CheckerCompleted - signal
1113
1486
access="readwrite")
1114
1487
def ApprovalDuration_dbus_property(self, value=None):
1115
1488
if value is None: # get
1116
return dbus.UInt64(_timedelta_to_milliseconds(
1489
return dbus.UInt64(timedelta_to_milliseconds(
1117
1490
self.approval_duration))
1118
1491
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1119
1492
1133
1506
def Host_dbus_property(self, value=None):
1134
1507
if value is None: # get
1135
1508
return dbus.String(self.host)
1136
self.host = value
1509
self.host = unicode(value)
1137
1510
1138
1511
# Created - property
1139
1512
@dbus_service_property(_interface, signature="s", access="read")
1140
1513
def Created_dbus_property(self):
1141
return dbus.String(datetime_to_dbus(self.created))
1514
return datetime_to_dbus(self.created)
1142
1515
1143
1516
# LastEnabled - property
1144
1517
@dbus_service_property(_interface, signature="s", access="read")
1165
1538
return
1166
1539
return datetime_to_dbus(self.last_checked_ok)
1167
1540
1541
# LastCheckerStatus - property
1542
@dbus_service_property(_interface, signature="n",
1543
access="read")
1544
def LastCheckerStatus_dbus_property(self):
1545
return dbus.Int16(self.last_checker_status)
1546
1168
1547
# Expires - property
1169
1548
@dbus_service_property(_interface, signature="s", access="read")
1170
1549
def Expires_dbus_property(self):
1181
1560
def Timeout_dbus_property(self, value=None):
1182
1561
if value is None: # get
1183
1562
return dbus.UInt64(self.timeout_milliseconds())
1563
old_timeout = self.timeout
1184
1564
self.timeout = datetime.timedelta(0, 0, 0, value)
1185
if getattr(self, "disable_initiator_tag", None) is None:
1186
return
1187
# Reschedule timeout
1188
gobject.source_remove(self.disable_initiator_tag)
1189
self.disable_initiator_tag = None
1190
self.expires = None
1191
time_to_die = _timedelta_to_milliseconds((self
1192
.last_checked_ok
1193
+ self.timeout)
1194
- datetime.datetime
1195
.utcnow())
1196
if time_to_die <= 0:
1197
# The timeout has passed
1198
self.disable()
1199
else:
1200
self.expires = (datetime.datetime.utcnow()
1201
+ datetime.timedelta(milliseconds =
1202
time_to_die))
1203
self.disable_initiator_tag = (gobject.timeout_add
1204
(time_to_die, self.disable))
1565
# Reschedule disabling
1566
if self.enabled:
1567
now = datetime.datetime.utcnow()
1568
self.expires += self.timeout - old_timeout
1569
if self.expires <= now:
1570
# The timeout has passed
1571
self.disable()
1572
else:
1573
if (getattr(self, "disable_initiator_tag", None)
1574
is None):
1575
return
1576
gobject.source_remove(self.disable_initiator_tag)
1577
self.disable_initiator_tag = (
1578
gobject.timeout_add(
1579
timedelta_to_milliseconds(self.expires - now),
1580
self.disable))
1205
1581
1206
1582
# ExtendedTimeout - property
1207
1583
@dbus_service_property(_interface, signature="t",
1220
1596
self.interval = datetime.timedelta(0, 0, 0, value)
1221
1597
if getattr(self, "checker_initiator_tag", None) is None:
1222
1598
return
1223
# Reschedule checker run
1224
gobject.source_remove(self.checker_initiator_tag)
1225
self.checker_initiator_tag = (gobject.timeout_add
1226
(value, self.start_checker))
1227
self.start_checker() # Start one now, too
1599
if self.enabled:
1600
# Reschedule checker run
1601
gobject.source_remove(self.checker_initiator_tag)
1602
self.checker_initiator_tag = (gobject.timeout_add
1603
(value, self.start_checker))
1604
self.start_checker() # Start one now, too
1228
1605
1229
1606
# Checker - property
1230
1607
@dbus_service_property(_interface, signature="s",
1232
1609
def Checker_dbus_property(self, value=None):
1233
1610
if value is None: # get
1234
1611
return dbus.String(self.checker_command)
1235
self.checker_command = value
1612
self.checker_command = unicode(value)
1236
1613
1237
1614
# CheckerRunning - property
1238
1615
@dbus_service_property(_interface, signature="b",
1267
1644
raise KeyError()
1268
1645
1269
1646
def __getattribute__(self, name):
1270
if(name == '_pipe'):
1647
if name == '_pipe':
1271
1648
return super(ProxyClient, self).__getattribute__(name)
1272
1649
self._pipe.send(('getattr', name))
1273
1650
data = self._pipe.recv()
1280
1657
return func
1281
1658
1282
1659
def __setattr__(self, name, value):
1283
if(name == '_pipe'):
1660
if name == '_pipe':
1284
1661
return super(ProxyClient, self).__setattr__(name, value)
1285
1662
self._pipe.send(('setattr', name, value))
1286
1663
1287
class ClientDBusTransitional(ClientDBus):
1288
__metaclass__ = AlternateDBusNamesMetaclass
1289
1664
1290
1665
class ClientHandler(socketserver.BaseRequestHandler, object):
1291
1666
"""A class to handle client connections.
1328
1703
logger.debug("Protocol version: %r", line)
1329
1704
try:
1330
1705
if int(line.strip().split()[0]) > 1:
1331
raise RuntimeError
1706
raise RuntimeError(line)
1332
1707
except (ValueError, IndexError, RuntimeError) as error:
1333
1708
logger.error("Unknown protocol version: %s", error)
1334
1709
return
1374
1749
client.Rejected("Disabled")
1375
1750
return
1376
1751
1377
if client._approved or not client.approval_delay:
1752
if client.approved or not client.approval_delay:
1378
1753
#We are approved or approval is disabled
1379
1754
break
1380
elif client._approved is None:
1755
elif client.approved is None:
1381
1756
logger.info("Client %s needs approval",
1382
1757
client.name)
1383
1758
if self.server.use_dbus:
1396
1771
#wait until timeout or approved
1397
1772
time = datetime.datetime.now()
1398
1773
client.changedstate.acquire()
1399
(client.changedstate.wait
1400
(float(client._timedelta_to_milliseconds(delay)
1401
/ 1000)))
1774
client.changedstate.wait(
1775
float(timedelta_to_milliseconds(delay)
1776
/ 1000))
1402
1777
client.changedstate.release()
1403
1778
time2 = datetime.datetime.now()
1404
1779
if (time2 - time) >= delay:
1420
1795
try:
1421
1796
sent = session.send(client.secret[sent_size:])
1422
1797
except gnutls.errors.GNUTLSError as error:
1423
logger.warning("gnutls send failed")
1798
logger.warning("gnutls send failed",
1799
exc_info=error)
1424
1800
return
1425
1801
logger.debug("Sent: %d, remaining: %d",
1426
1802
sent, len(client.secret)
1429
1805
1430
1806
logger.info("Sending secret to %s", client.name)
1431
1807
# bump the timeout using extended_timeout
1432
client.checked_ok(client.extended_timeout)
1808
client.bump_timeout(client.extended_timeout)
1433
1809
if self.server.use_dbus:
1434
1810
# Emit D-Bus signal
1435
1811
client.GotSecret()
1440
1816
try:
1441
1817
session.bye()
1442
1818
except gnutls.errors.GNUTLSError as error:
1443
logger.warning("GnuTLS bye failed")
1819
logger.warning("GnuTLS bye failed",
1820
exc_info=error)
1444
1821
1445
1822
@staticmethod
1446
1823
def peer_certificate(session):
1502
1879
# Convert the buffer to a Python bytestring
1503
1880
fpr = ctypes.string_at(buf, buf_len.value)
1504
1881
# Convert the bytestring to hexadecimal notation
1505
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1882
hex_fpr = binascii.hexlify(fpr).upper()
1506
1883
return hex_fpr
1507
1884
1508
1885
1511
1888
def sub_process_main(self, request, address):
1512
1889
try:
1513
1890
self.finish_request(request, address)
1514
except:
1891
except Exception:
1515
1892
self.handle_error(request, address)
1516
1893
self.close_request(request)
1517
1894
1518
1895
def process_request(self, request, address):
1519
1896
"""Start a new process to process the request."""
1520
1897
proc = multiprocessing.Process(target = self.sub_process_main,
1521
args = (request,
1522
address))
1898
args = (request, address))
1523
1899
proc.start()
1524
1900
return proc
1525
1901
1540
1916
1541
1917
def add_pipe(self, parent_pipe, proc):
1542
1918
"""Dummy function; override as necessary"""
1543
raise NotImplementedError
1919
raise NotImplementedError()
1544
1920
1545
1921
1546
1922
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1553
1929
use_ipv6: Boolean; to use IPv6 or not
1554
1930
"""
1555
1931
def __init__(self, server_address, RequestHandlerClass,
1556
interface=None, use_ipv6=True):
1932
interface=None, use_ipv6=True, socketfd=None):
1933
"""If socketfd is set, use that file descriptor instead of
1934
creating a new one with socket.socket().
1935
"""
1557
1936
self.interface = interface
1558
1937
if use_ipv6:
1559
1938
self.address_family = socket.AF_INET6
1939
if socketfd is not None:
1940
# Save the file descriptor
1941
self.socketfd = socketfd
1942
# Save the original socket.socket() function
1943
self.socket_socket = socket.socket
1944
# To implement --socket, we monkey patch socket.socket.
1945
#
1946
# (When socketserver.TCPServer is a new-style class, we
1947
# could make self.socket into a property instead of monkey
1948
# patching socket.socket.)
1949
#
1950
# Create a one-time-only replacement for socket.socket()
1951
@functools.wraps(socket.socket)
1952
def socket_wrapper(*args, **kwargs):
1953
# Restore original function so subsequent calls are
1954
# not affected.
1955
socket.socket = self.socket_socket
1956
del self.socket_socket
1957
# This time only, return a new socket object from the
1958
# saved file descriptor.
1959
return socket.fromfd(self.socketfd, *args, **kwargs)
1960
# Replace socket.socket() function with wrapper
1961
socket.socket = socket_wrapper
1962
# The socketserver.TCPServer.__init__ will call
1963
# socket.socket(), which might be our replacement,
1964
# socket_wrapper(), if socketfd was set.
1560
1965
socketserver.TCPServer.__init__(self, server_address,
1561
1966
RequestHandlerClass)
1967
1562
1968
def server_bind(self):
1563
1969
"""This overrides the normal server_bind() function
1564
1970
to bind to an interface if one was specified, and also NOT to
1572
1978
try:
1573
1979
self.socket.setsockopt(socket.SOL_SOCKET,
1574
1980
SO_BINDTODEVICE,
1575
str(self.interface
1576
+ '\0'))
1981
str(self.interface + '\0'))
1577
1982
except socket.error as error:
1578
if error[0] == errno.EPERM:
1579
logger.error("No permission to"
1580
" bind to interface %s",
1581
self.interface)
1582
elif error[0] == errno.ENOPROTOOPT:
1983
if error.errno == errno.EPERM:
1984
logger.error("No permission to bind to"
1985
" interface %s", self.interface)
1986
elif error.errno == errno.ENOPROTOOPT:
1583
1987
logger.error("SO_BINDTODEVICE not available;"
1584
1988
" cannot bind to interface %s",
1585
1989
self.interface)
1990
elif error.errno == errno.ENODEV:
1991
logger.error("Interface %s does not exist,"
1992
" cannot bind", self.interface)
1586
1993
else:
1587
1994
raise
1588
1995
# Only bind(2) the socket if we really need to.
1591
1998
if self.address_family == socket.AF_INET6:
1592
1999
any_address = "::" # in6addr_any
1593
2000
else:
1594
any_address = socket.INADDR_ANY
2001
any_address = "0.0.0.0" # INADDR_ANY
1595
2002
self.server_address = (any_address,
1596
2003
self.server_address[1])
1597
2004
elif not self.server_address[1]:
1618
2025
"""
1619
2026
def __init__(self, server_address, RequestHandlerClass,
1620
2027
interface=None, use_ipv6=True, clients=None,
1621
gnutls_priority=None, use_dbus=True):
2028
gnutls_priority=None, use_dbus=True, socketfd=None):
1622
2029
self.enabled = False
1623
2030
self.clients = clients
1624
2031
if self.clients is None:
1625
self.clients = set()
2032
self.clients = {}
1626
2033
self.use_dbus = use_dbus
1627
2034
self.gnutls_priority = gnutls_priority
1628
2035
IPv6_TCPServer.__init__(self, server_address,
1629
2036
RequestHandlerClass,
1630
2037
interface = interface,
1631
use_ipv6 = use_ipv6)
2038
use_ipv6 = use_ipv6,
2039
socketfd = socketfd)
1632
2040
def server_activate(self):
1633
2041
if self.enabled:
1634
2042
return socketserver.TCPServer.server_activate(self)
1647
2055
1648
2056
def handle_ipc(self, source, condition, parent_pipe=None,
1649
2057
proc = None, client_object=None):
1650
condition_names = {
1651
gobject.IO_IN: "IN", # There is data to read.
1652
gobject.IO_OUT: "OUT", # Data can be written (without
1653
# blocking).
1654
gobject.IO_PRI: "PRI", # There is urgent data to read.
1655
gobject.IO_ERR: "ERR", # Error condition.
1656
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1657
# broken, usually for pipes and
1658
# sockets).
1659
}
1660
conditions_string = ' | '.join(name
1661
for cond, name in
1662
condition_names.iteritems()
1663
if cond & condition)
1664
2058
# error, or the other end of multiprocessing.Pipe has closed
1665
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2059
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1666
2060
# Wait for other process to exit
1667
2061
proc.join()
1668
2062
return False
1675
2069
fpr = request[1]
1676
2070
address = request[2]
1677
2071
1678
for c in self.clients:
2072
for c in self.clients.itervalues():
1679
2073
if c.fingerprint == fpr:
1680
2074
client = c
1681
2075
break
1726
2120
return True
1727
2121
1728
2122
2123
def rfc3339_duration_to_delta(duration):
2124
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2125
2126
>>> rfc3339_duration_to_delta("P7D")
2127
datetime.timedelta(7)
2128
>>> rfc3339_duration_to_delta("PT60S")
2129
datetime.timedelta(0, 60)
2130
>>> rfc3339_duration_to_delta("PT60M")
2131
datetime.timedelta(0, 3600)
2132
>>> rfc3339_duration_to_delta("PT24H")
2133
datetime.timedelta(1)
2134
>>> rfc3339_duration_to_delta("P1W")
2135
datetime.timedelta(7)
2136
>>> rfc3339_duration_to_delta("PT5M30S")
2137
datetime.timedelta(0, 330)
2138
>>> rfc3339_duration_to_delta("P1DT3M20S")
2139
datetime.timedelta(1, 200)
2140
"""
2141
2142
# Parsing an RFC 3339 duration with regular expressions is not
2143
# possible - there would have to be multiple places for the same
2144
# values, like seconds. The current code, while more esoteric, is
2145
# cleaner without depending on a parsing library. If Python had a
2146
# built-in library for parsing we would use it, but we'd like to
2147
# avoid excessive use of external libraries.
2148
2149
# New type for defining tokens, syntax, and semantics all-in-one
2150
Token = collections.namedtuple("Token",
2151
("regexp", # To match token; if
2152
# "value" is not None,
2153
# must have a "group"
2154
# containing digits
2155
"value", # datetime.timedelta or
2156
# None
2157
"followers")) # Tokens valid after
2158
# this token
2159
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2160
# the "duration" ABNF definition in RFC 3339, Appendix A.
2161
token_end = Token(re.compile(r"$"), None, frozenset())
2162
token_second = Token(re.compile(r"(\d+)S"),
2163
datetime.timedelta(seconds=1),
2164
frozenset((token_end,)))
2165
token_minute = Token(re.compile(r"(\d+)M"),
2166
datetime.timedelta(minutes=1),
2167
frozenset((token_second, token_end)))
2168
token_hour = Token(re.compile(r"(\d+)H"),
2169
datetime.timedelta(hours=1),
2170
frozenset((token_minute, token_end)))
2171
token_time = Token(re.compile(r"T"),
2172
None,
2173
frozenset((token_hour, token_minute,
2174
token_second)))
2175
token_day = Token(re.compile(r"(\d+)D"),
2176
datetime.timedelta(days=1),
2177
frozenset((token_time, token_end)))
2178
token_month = Token(re.compile(r"(\d+)M"),
2179
datetime.timedelta(weeks=4),
2180
frozenset((token_day, token_end)))
2181
token_year = Token(re.compile(r"(\d+)Y"),
2182
datetime.timedelta(weeks=52),
2183
frozenset((token_month, token_end)))
2184
token_week = Token(re.compile(r"(\d+)W"),
2185
datetime.timedelta(weeks=1),
2186
frozenset((token_end,)))
2187
token_duration = Token(re.compile(r"P"), None,
2188
frozenset((token_year, token_month,
2189
token_day, token_time,
2190
token_week))),
2191
# Define starting values
2192
value = datetime.timedelta() # Value so far
2193
found_token = None
2194
followers = frozenset(token_duration,) # Following valid tokens
2195
s = duration # String left to parse
2196
# Loop until end token is found
2197
while found_token is not token_end:
2198
# Search for any currently valid tokens
2199
for token in followers:
2200
match = token.regexp.match(s)
2201
if match is not None:
2202
# Token found
2203
if token.value is not None:
2204
# Value found, parse digits
2205
factor = int(match.group(1), 10)
2206
# Add to value so far
2207
value += factor * token.value
2208
# Strip token from string
2209
s = token.regexp.sub("", s, 1)
2210
# Go to found token
2211
found_token = token
2212
# Set valid next tokens
2213
followers = found_token.followers
2214
break
2215
else:
2216
# No currently valid tokens were found
2217
raise ValueError("Invalid RFC 3339 duration")
2218
# End token found
2219
return value
2220
2221
1729
2222
def string_to_delta(interval):
1730
2223
"""Parse a string and return a datetime.timedelta
1731
2224
1742
2235
>>> string_to_delta('5m 30s')
1743
2236
datetime.timedelta(0, 330)
1744
2237
"""
2238
2239
try:
2240
return rfc3339_duration_to_delta(interval)
2241
except ValueError:
2242
pass
2243
1745
2244
timevalue = datetime.timedelta(0)
1746
2245
for s in interval.split():
1747
2246
try:
1758
2257
elif suffix == "w":
1759
2258
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1760
2259
else:
1761
raise ValueError("Unknown suffix %r" % suffix)
1762
except (ValueError, IndexError) as e:
2260
raise ValueError("Unknown suffix {0!r}"
2261
.format(suffix))
2262
except IndexError as e:
1763
2263
raise ValueError(*(e.args))
1764
2264
timevalue += delta
1765
2265
return timevalue
1766
2266
1767
2267
1768
def if_nametoindex(interface):
1769
"""Call the C function if_nametoindex(), or equivalent
1770
1771
Note: This function cannot accept a unicode string."""
1772
global if_nametoindex
1773
try:
1774
if_nametoindex = (ctypes.cdll.LoadLibrary
1775
(ctypes.util.find_library("c"))
1776
.if_nametoindex)
1777
except (OSError, AttributeError):
1778
logger.warning("Doing if_nametoindex the hard way")
1779
def if_nametoindex(interface):
1780
"Get an interface index the hard way, i.e. using fcntl()"
1781
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1782
with contextlib.closing(socket.socket()) as s:
1783
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1784
struct.pack(str("16s16x"),
1785
interface))
1786
interface_index = struct.unpack(str("I"),
1787
ifreq[16:20])[0]
1788
return interface_index
1789
return if_nametoindex(interface)
1790
1791
1792
2268
def daemon(nochdir = False, noclose = False):
1793
2269
"""See daemon(3). Standard BSD Unix function.
1794
2270
1802
2278
sys.exit()
1803
2279
if not noclose:
1804
2280
# Close all standard open file descriptors
1805
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2281
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1806
2282
if not stat.S_ISCHR(os.fstat(null).st_mode):
1807
2283
raise OSError(errno.ENODEV,
1808
"%s not a character device"
1809
% os.path.devnull)
2284
"{0} not a character device"
2285
.format(os.devnull))
1810
2286
os.dup2(null, sys.stdin.fileno())
1811
2287
os.dup2(null, sys.stdout.fileno())
1812
2288
os.dup2(null, sys.stderr.fileno())
1821
2297
1822
2298
parser = argparse.ArgumentParser()
1823
2299
parser.add_argument("-v", "--version", action="version",
1824
version = "%%(prog)s %s" % version,
2300
version = "%(prog)s {0}".format(version),
1825
2301
help="show version number and exit")
1826
2302
parser.add_argument("-i", "--interface", metavar="IF",
1827
2303
help="Bind to interface IF")
1833
2309
help="Run self-test")
1834
2310
parser.add_argument("--debug", action="store_true",
1835
2311
help="Debug mode; run in foreground and log"
1836
" to terminal")
2312
" to terminal", default=None)
1837
2313
parser.add_argument("--debuglevel", metavar="LEVEL",
1838
2314
help="Debug level for stdout output")
1839
2315
parser.add_argument("--priority", help="GnuTLS"
1846
2322
" files")
1847
2323
parser.add_argument("--no-dbus", action="store_false",
1848
2324
dest="use_dbus", help="Do not provide D-Bus"
1849
" system bus interface")
2325
" system bus interface", default=None)
1850
2326
parser.add_argument("--no-ipv6", action="store_false",
1851
dest="use_ipv6", help="Do not use IPv6")
2327
dest="use_ipv6", help="Do not use IPv6",
2328
default=None)
2329
parser.add_argument("--no-restore", action="store_false",
2330
dest="restore", help="Do not restore stored"
2331
" state", default=None)
2332
parser.add_argument("--socket", type=int,
2333
help="Specify a file descriptor to a network"
2334
" socket to use instead of creating one")
2335
parser.add_argument("--statedir", metavar="DIR",
2336
help="Directory to save/restore state in")
2337
parser.add_argument("--foreground", action="store_true",
2338
help="Run in foreground", default=None)
2339
1852
2340
options = parser.parse_args()
1853
2341
1854
2342
if options.check:
1862
2350
"port": "",
1863
2351
"debug": "False",
1864
2352
"priority":
1865
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2353
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1866
2354
"servicename": "Mandos",
1867
2355
"use_dbus": "True",
1868
2356
"use_ipv6": "True",
1869
2357
"debuglevel": "",
2358
"restore": "True",
2359
"socket": "",
2360
"statedir": "/var/lib/mandos",
2361
"foreground": "False",
1870
2362
}
1871
2363
1872
2364
# Parse config file for server-global settings
1877
2369
# Convert the SafeConfigParser object to a dict
1878
2370
server_settings = server_config.defaults()
1879
2371
# Use the appropriate methods on the non-string config options
1880
for option in ("debug", "use_dbus", "use_ipv6"):
2372
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1881
2373
server_settings[option] = server_config.getboolean("DEFAULT",
1882
2374
option)
1883
2375
if server_settings["port"]:
1884
2376
server_settings["port"] = server_config.getint("DEFAULT",
1885
2377
"port")
2378
if server_settings["socket"]:
2379
server_settings["socket"] = server_config.getint("DEFAULT",
2380
"socket")
2381
# Later, stdin will, and stdout and stderr might, be dup'ed
2382
# over with an opened os.devnull. But we don't want this to
2383
# happen with a supplied network socket.
2384
if 0 <= server_settings["socket"] <= 2:
2385
server_settings["socket"] = os.dup(server_settings
2386
["socket"])
1886
2387
del server_config
1887
2388
1888
2389
# Override the settings from the config file with command line
1889
2390
# options, if set.
1890
2391
for option in ("interface", "address", "port", "debug",
1891
2392
"priority", "servicename", "configdir",
1892
"use_dbus", "use_ipv6", "debuglevel"):
2393
"use_dbus", "use_ipv6", "debuglevel", "restore",
2394
"statedir", "socket", "foreground"):
1893
2395
value = getattr(options, option)
1894
2396
if value is not None:
1895
2397
server_settings[option] = value
1898
2400
for option in server_settings.keys():
1899
2401
if type(server_settings[option]) is str:
1900
2402
server_settings[option] = unicode(server_settings[option])
2403
# Force all boolean options to be boolean
2404
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2405
"foreground"):
2406
server_settings[option] = bool(server_settings[option])
2407
# Debug implies foreground
2408
if server_settings["debug"]:
2409
server_settings["foreground"] = True
1901
2410
# Now we have our good server settings in "server_settings"
1902
2411
1903
2412
##################################################################
1907
2416
debuglevel = server_settings["debuglevel"]
1908
2417
use_dbus = server_settings["use_dbus"]
1909
2418
use_ipv6 = server_settings["use_ipv6"]
2419
stored_state_path = os.path.join(server_settings["statedir"],
2420
stored_state_file)
2421
foreground = server_settings["foreground"]
2422
2423
if debug:
2424
initlogger(debug, logging.DEBUG)
2425
else:
2426
if not debuglevel:
2427
initlogger(debug)
2428
else:
2429
level = getattr(logging, debuglevel.upper())
2430
initlogger(debug, level)
1910
2431
1911
2432
if server_settings["servicename"] != "Mandos":
1912
2433
syslogger.setFormatter(logging.Formatter
1913
('Mandos (%s) [%%(process)d]:'
1914
' %%(levelname)s: %%(message)s'
1915
% server_settings["servicename"]))
2434
('Mandos ({0}) [%(process)d]:'
2435
' %(levelname)s: %(message)s'
2436
.format(server_settings
2437
["servicename"])))
1916
2438
1917
2439
# Parse config file with clients
1918
client_defaults = { "timeout": "5m",
1919
"extended_timeout": "15m",
1920
"interval": "2m",
1921
"checker": "fping -q -- %%(host)s",
1922
"host": "",
1923
"approval_delay": "0s",
1924
"approval_duration": "1s",
1925
}
1926
client_config = configparser.SafeConfigParser(client_defaults)
2440
client_config = configparser.SafeConfigParser(Client
2441
.client_defaults)
1927
2442
client_config.read(os.path.join(server_settings["configdir"],
1928
2443
"clients.conf"))
1929
2444
1938
2453
use_ipv6=use_ipv6,
1939
2454
gnutls_priority=
1940
2455
server_settings["priority"],
1941
use_dbus=use_dbus)
1942
if not debug:
1943
pidfilename = "/var/run/mandos.pid"
2456
use_dbus=use_dbus,
2457
socketfd=(server_settings["socket"]
2458
or None))
2459
if not foreground:
2460
pidfilename = "/run/mandos.pid"
2461
if not os.path.isdir("/run/."):
2462
pidfilename = "/var/run/mandos.pid"
2463
pidfile = None
1944
2464
try:
1945
2465
pidfile = open(pidfilename, "w")
1946
except IOError:
1947
logger.error("Could not open file %r", pidfilename)
2466
except IOError as e:
2467
logger.error("Could not open file %r", pidfilename,
2468
exc_info=e)
1948
2469
1949
try:
1950
uid = pwd.getpwnam("_mandos").pw_uid
1951
gid = pwd.getpwnam("_mandos").pw_gid
1952
except KeyError:
2470
for name in ("_mandos", "mandos", "nobody"):
1953
2471
try:
1954
uid = pwd.getpwnam("mandos").pw_uid
1955
gid = pwd.getpwnam("mandos").pw_gid
2472
uid = pwd.getpwnam(name).pw_uid
2473
gid = pwd.getpwnam(name).pw_gid
2474
break
1956
2475
except KeyError:
1957
try:
1958
uid = pwd.getpwnam("nobody").pw_uid
1959
gid = pwd.getpwnam("nobody").pw_gid
1960
except KeyError:
1961
uid = 65534
1962
gid = 65534
2476
continue
2477
else:
2478
uid = 65534
2479
gid = 65534
1963
2480
try:
1964
2481
os.setgid(gid)
1965
2482
os.setuid(uid)
1966
2483
except OSError as error:
1967
if error[0] != errno.EPERM:
1968
raise error
1969
1970
if not debug and not debuglevel:
1971
syslogger.setLevel(logging.WARNING)
1972
console.setLevel(logging.WARNING)
1973
if debuglevel:
1974
level = getattr(logging, debuglevel.upper())
1975
syslogger.setLevel(level)
1976
console.setLevel(level)
2484
if error.errno != errno.EPERM:
2485
raise
1977
2486
1978
2487
if debug:
1979
2488
# Enable all possible GnuTLS debugging
1990
2499
.gnutls_global_set_log_function(debug_gnutls))
1991
2500
1992
2501
# Redirect stdin so all checkers get /dev/null
1993
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2502
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1994
2503
os.dup2(null, sys.stdin.fileno())
1995
2504
if null > 2:
1996
2505
os.close(null)
1997
else:
1998
# No console logging
1999
logger.removeHandler(console)
2000
2506
2001
2507
# Need to fork before connecting to D-Bus
2002
if not debug:
2508
if not foreground:
2003
2509
# Close all input and output, do double fork, etc.
2004
2510
daemon()
2005
2511
2512
# multiprocessing will use threads, so before we use gobject we
2513
# need to inform gobject that threads will be used.
2514
gobject.threads_init()
2515
2006
2516
global main_loop
2007
2517
# From the Avahi example code
2008
DBusGMainLoop(set_as_default=True )
2518
DBusGMainLoop(set_as_default=True)
2009
2519
main_loop = gobject.MainLoop()
2010
2520
bus = dbus.SystemBus()
2011
2521
# End of Avahi example code
2017
2527
("se.bsnet.fukt.Mandos", bus,
2018
2528
do_not_queue=True))
2019
2529
except dbus.exceptions.NameExistsException as e:
2020
logger.error(unicode(e) + ", disabling D-Bus")
2530
logger.error("Disabling D-Bus:", exc_info=e)
2021
2531
use_dbus = False
2022
2532
server_settings["use_dbus"] = False
2023
2533
tcp_server.use_dbus = False
2024
2534
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2025
service = AvahiService(name = server_settings["servicename"],
2026
servicetype = "_mandos._tcp",
2027
protocol = protocol, bus = bus)
2535
service = AvahiServiceToSyslog(name =
2536
server_settings["servicename"],
2537
servicetype = "_mandos._tcp",
2538
protocol = protocol, bus = bus)
2028
2539
if server_settings["interface"]:
2029
2540
service.interface = (if_nametoindex
2030
2541
(str(server_settings["interface"])))
2034
2545
2035
2546
client_class = Client
2036
2547
if use_dbus:
2037
client_class = functools.partial(ClientDBusTransitional,
2038
bus = bus)
2039
def client_config_items(config, section):
2040
special_settings = {
2041
"approved_by_default":
2042
lambda: config.getboolean(section,
2043
"approved_by_default"),
2044
}
2045
for name, value in config.items(section):
2548
client_class = functools.partial(ClientDBus, bus = bus)
2549
2550
client_settings = Client.config_parser(client_config)
2551
old_client_settings = {}
2552
clients_data = {}
2553
2554
# This is used to redirect stdout and stderr for checker processes
2555
global wnull
2556
wnull = open(os.devnull, "w") # A writable /dev/null
2557
# Only used if server is running in foreground but not in debug
2558
# mode
2559
if debug or not foreground:
2560
wnull.close()
2561
2562
# Get client data and settings from last running state.
2563
if server_settings["restore"]:
2564
try:
2565
with open(stored_state_path, "rb") as stored_state:
2566
clients_data, old_client_settings = (pickle.load
2567
(stored_state))
2568
os.remove(stored_state_path)
2569
except IOError as e:
2570
if e.errno == errno.ENOENT:
2571
logger.warning("Could not load persistent state: {0}"
2572
.format(os.strerror(e.errno)))
2573
else:
2574
logger.critical("Could not load persistent state:",
2575
exc_info=e)
2576
raise
2577
except EOFError as e:
2578
logger.warning("Could not load persistent state: "
2579
"EOFError:", exc_info=e)
2580
2581
with PGPEngine() as pgp:
2582
for client_name, client in clients_data.iteritems():
2583
# Skip removed clients
2584
if client_name not in client_settings:
2585
continue
2586
2587
# Decide which value to use after restoring saved state.
2588
# We have three different values: Old config file,
2589
# new config file, and saved state.
2590
# New config value takes precedence if it differs from old
2591
# config value, otherwise use saved state.
2592
for name, value in client_settings[client_name].items():
2593
try:
2594
# For each value in new config, check if it
2595
# differs from the old config value (Except for
2596
# the "secret" attribute)
2597
if (name != "secret" and
2598
value != old_client_settings[client_name]
2599
[name]):
2600
client[name] = value
2601
except KeyError:
2602
pass
2603
2604
# Clients who has passed its expire date can still be
2605
# enabled if its last checker was successful. Clients
2606
# whose checker succeeded before we stored its state is
2607
# assumed to have successfully run all checkers during
2608
# downtime.
2609
if client["enabled"]:
2610
if datetime.datetime.utcnow() >= client["expires"]:
2611
if not client["last_checked_ok"]:
2612
logger.warning(
2613
"disabling client {0} - Client never "
2614
"performed a successful checker"
2615
.format(client_name))
2616
client["enabled"] = False
2617
elif client["last_checker_status"] != 0:
2618
logger.warning(
2619
"disabling client {0} - Client "
2620
"last checker failed with error code {1}"
2621
.format(client_name,
2622
client["last_checker_status"]))
2623
client["enabled"] = False
2624
else:
2625
client["expires"] = (datetime.datetime
2626
.utcnow()
2627
+ client["timeout"])
2628
logger.debug("Last checker succeeded,"
2629
" keeping {0} enabled"
2630
.format(client_name))
2046
2631
try:
2047
yield (name, special_settings[name]())
2048
except KeyError:
2049
yield (name, value)
2050
2051
tcp_server.clients.update(set(
2052
client_class(name = section,
2053
config= dict(client_config_items(
2054
client_config, section)))
2055
for section in client_config.sections()))
2632
client["secret"] = (
2633
pgp.decrypt(client["encrypted_secret"],
2634
client_settings[client_name]
2635
["secret"]))
2636
except PGPError:
2637
# If decryption fails, we use secret from new settings
2638
logger.debug("Failed to decrypt {0} old secret"
2639
.format(client_name))
2640
client["secret"] = (
2641
client_settings[client_name]["secret"])
2642
2643
# Add/remove clients based on new changes made to config
2644
for client_name in (set(old_client_settings)
2645
- set(client_settings)):
2646
del clients_data[client_name]
2647
for client_name in (set(client_settings)
2648
- set(old_client_settings)):
2649
clients_data[client_name] = client_settings[client_name]
2650
2651
# Create all client objects
2652
for client_name, client in clients_data.iteritems():
2653
tcp_server.clients[client_name] = client_class(
2654
name = client_name, settings = client,
2655
server_settings = server_settings)
2656
2056
2657
if not tcp_server.clients:
2057
2658
logger.warning("No clients defined")
2058
2059
if not debug:
2060
try:
2061
with pidfile:
2062
pid = os.getpid()
2063
pidfile.write(str(pid) + "\n".encode("utf-8"))
2064
del pidfile
2065
except IOError:
2066
logger.error("Could not write to file %r with PID %d",
2067
pidfilename, pid)
2068
except NameError:
2069
# "pidfile" was never created
2070
pass
2659
2660
if not foreground:
2661
if pidfile is not None:
2662
try:
2663
with pidfile:
2664
pid = os.getpid()
2665
pidfile.write(str(pid) + "\n".encode("utf-8"))
2666
except IOError:
2667
logger.error("Could not write to file %r with PID %d",
2668
pidfilename, pid)
2669
del pidfile
2071
2670
del pidfilename
2072
2073
signal.signal(signal.SIGINT, signal.SIG_IGN)
2074
2671
2075
2672
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2076
2673
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2077
2674
2078
2675
if use_dbus:
2079
class MandosDBusService(dbus.service.Object):
2676
@alternate_dbus_interfaces({"se.recompile.Mandos":
2677
"se.bsnet.fukt.Mandos"})
2678
class MandosDBusService(DBusObjectWithProperties):
2080
2679
"""A D-Bus proxy object"""
2081
2680
def __init__(self):
2082
2681
dbus.service.Object.__init__(self, bus, "/")
2083
2682
_interface = "se.recompile.Mandos"
2084
2683
2684
@dbus_interface_annotations(_interface)
2685
def _foo(self):
2686
return { "org.freedesktop.DBus.Property"
2687
".EmitsChangedSignal":
2688
"false"}
2689
2085
2690
@dbus.service.signal(_interface, signature="o")
2086
2691
def ClientAdded(self, objpath):
2087
2692
"D-Bus signal"
2101
2706
def GetAllClients(self):
2102
2707
"D-Bus method"
2103
2708
return dbus.Array(c.dbus_object_path
2104
for c in tcp_server.clients)
2709
for c in
2710
tcp_server.clients.itervalues())
2105
2711
2106
2712
@dbus.service.method(_interface,
2107
2713
out_signature="a{oa{sv}}")
2109
2715
"D-Bus method"
2110
2716
return dbus.Dictionary(
2111
2717
((c.dbus_object_path, c.GetAll(""))
2112
for c in tcp_server.clients),
2718
for c in tcp_server.clients.itervalues()),
2113
2719
signature="oa{sv}")
2114
2720
2115
2721
@dbus.service.method(_interface, in_signature="o")
2116
2722
def RemoveClient(self, object_path):
2117
2723
"D-Bus method"
2118
for c in tcp_server.clients:
2724
for c in tcp_server.clients.itervalues():
2119
2725
if c.dbus_object_path == object_path:
2120
tcp_server.clients.remove(c)
2726
del tcp_server.clients[c.name]
2121
2727
c.remove_from_connection()
2122
2728
# Don't signal anything except ClientRemoved
2123
2729
c.disable(quiet=True)
2128
2734
2129
2735
del _interface
2130
2736
2131
class MandosDBusServiceTransitional(MandosDBusService):
2132
__metaclass__ = AlternateDBusNamesMetaclass
2133
mandos_dbus_service = MandosDBusServiceTransitional()
2737
mandos_dbus_service = MandosDBusService()
2134
2738
2135
2739
def cleanup():
2136
2740
"Cleanup function; run on exit"
2137
2741
service.cleanup()
2138
2742
2139
2743
multiprocessing.active_children()
2744
wnull.close()
2745
if not (tcp_server.clients or client_settings):
2746
return
2747
2748
# Store client before exiting. Secrets are encrypted with key
2749
# based on what config file has. If config file is
2750
# removed/edited, old secret will thus be unrecovable.
2751
clients = {}
2752
with PGPEngine() as pgp:
2753
for client in tcp_server.clients.itervalues():
2754
key = client_settings[client.name]["secret"]
2755
client.encrypted_secret = pgp.encrypt(client.secret,
2756
key)
2757
client_dict = {}
2758
2759
# A list of attributes that can not be pickled
2760
# + secret.
2761
exclude = set(("bus", "changedstate", "secret",
2762
"checker", "server_settings"))
2763
for name, typ in (inspect.getmembers
2764
(dbus.service.Object)):
2765
exclude.add(name)
2766
2767
client_dict["encrypted_secret"] = (client
2768
.encrypted_secret)
2769
for attr in client.client_structure:
2770
if attr not in exclude:
2771
client_dict[attr] = getattr(client, attr)
2772
2773
clients[client.name] = client_dict
2774
del client_settings[client.name]["secret"]
2775
2776
try:
2777
with (tempfile.NamedTemporaryFile
2778
(mode='wb', suffix=".pickle", prefix='clients-',
2779
dir=os.path.dirname(stored_state_path),
2780
delete=False)) as stored_state:
2781
pickle.dump((clients, client_settings), stored_state)
2782
tempname=stored_state.name
2783
os.rename(tempname, stored_state_path)
2784
except (IOError, OSError) as e:
2785
if not debug:
2786
try:
2787
os.remove(tempname)
2788
except NameError:
2789
pass
2790
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2791
logger.warning("Could not save persistent state: {0}"
2792
.format(os.strerror(e.errno)))
2793
else:
2794
logger.warning("Could not save persistent state:",
2795
exc_info=e)
2796
raise
2797
2798
# Delete all clients, and settings from config
2140
2799
while tcp_server.clients:
2141
client = tcp_server.clients.pop()
2800
name, client = tcp_server.clients.popitem()
2142
2801
if use_dbus:
2143
2802
client.remove_from_connection()
2144
client.disable_hook = None
2145
2803
# Don't signal anything except ClientRemoved
2146
2804
client.disable(quiet=True)
2147
2805
if use_dbus:
2149
2807
mandos_dbus_service.ClientRemoved(client
2150
2808
.dbus_object_path,
2151
2809
client.name)
2810
client_settings.clear()
2152
2811
2153
2812
atexit.register(cleanup)
2154
2813
2155
for client in tcp_server.clients:
2814
for client in tcp_server.clients.itervalues():
2156
2815
if use_dbus:
2157
2816
# Emit D-Bus signal
2158
2817
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2159
client.enable()
2818
# Need to initiate checking of clients
2819
if client.enabled:
2820
client.init_checker()
2160
2821
2161
2822
tcp_server.enable()
2162
2823
tcp_server.server_activate()
2165
2826
service.port = tcp_server.socket.getsockname()[1]
2166
2827
if use_ipv6:
2167
2828
logger.info("Now listening on address %r, port %d,"
2168
" flowinfo %d, scope_id %d"
2169
% tcp_server.socket.getsockname())
2829
" flowinfo %d, scope_id %d",
2830
*tcp_server.socket.getsockname())
2170
2831
else: # IPv4
2171
logger.info("Now listening on address %r, port %d"
2172
% tcp_server.socket.getsockname())
2832
logger.info("Now listening on address %r, port %d",
2833
*tcp_server.socket.getsockname())
2173
2834
2174
2835
#service.interface = tcp_server.socket.getsockname()[3]
2175
2836
2178
2839
try:
2179
2840
service.activate()
2180
2841
except dbus.exceptions.DBusException as error:
2181
logger.critical("DBusException: %s", error)
2842
logger.critical("D-Bus Exception", exc_info=error)
2182
2843
cleanup()
2183
2844
sys.exit(1)
2184
2845
# End of Avahi example code
2191
2852
logger.debug("Starting main loop")
2192
2853
main_loop.run()
2193
2854
except AvahiError as error:
2194
logger.critical("AvahiError: %s", error)
2855
logger.critical("Avahi Error", exc_info=error)
2195
2856
cleanup()
2196
2857
sys.exit(1)
2197
2858
except KeyboardInterrupt:
2202
2863
# Must run before the D-Bus bus name gets deregistered
2203
2864
cleanup()
2204
2865
2205
2206
2866
if __name__ == '__main__':
2207
2867
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0