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- Committer: Teddy Hogeborn
- Date: 2014-07-16 23:44:54 UTC
- Revision ID: teddy@recompile.se-20140716234454-6erpylmbf5qzndf3
mandos-client: Fix bug with GPGME 1.5.0.
* initramfs-tools-hook: If GPGME is 1.5.0 or later, copy "gpgconfig"
to RAM file system and do what GPGME does:
run "gpgconfig" to find GnuPG binary.
* initramfs-tools-hook: If GPGME is 1.5.0 or later, copy "gpgconfig"
to RAM file system and do what GPGME does:
run "gpgconfig" to find GnuPG binary.
- files added:
- 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
#
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13
# Everything else is
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# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
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# Copyright © 2008-2014 Teddy Hogeborn
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# Copyright © 2008-2014 Björn Påhlsson
16
16
#
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# 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
64
66
import multiprocessing
65
67
import types
68
import binascii
69
import tempfile
70
import itertools
71
import collections
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72
67
73
import dbus
68
74
import dbus.service
82
88
except ImportError:
83
89
SO_BINDTODEVICE = None
84
90
85
86
version = "1.3.1"
87
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
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)
91
version = "1.6.6"
92
stored_state_file = "clients.pickle"
93
94
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']
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def __enter__(self):
153
return self
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def __exit__(self, exc_type, exc_value, traceback):
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self._cleanup()
157
return False
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def __del__(self):
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self._cleanup()
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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
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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,
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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
222
103
223
104
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class AvahiError(Exception):
105
225
def __init__(self, value, *args, **kwargs):
123
243
Used to optionally bind to the specified interface.
124
244
name: string; Example: 'Mandos'
125
245
type: string; Example: '_mandos._tcp'.
126
See <http://www.dns-sd.org/ServiceTypes.html>
246
See <https://www.iana.org/assignments/service-names-port-numbers>
127
247
port: integer; what port to announce
128
248
TXT: list of strings; TXT record for the service
129
249
domain: string; Domain to publish on, default to .local if empty.
135
255
server: D-Bus Server
136
256
bus: dbus.SystemBus()
137
257
"""
258
138
259
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
139
260
servicetype = None, port = None, TXT = None,
140
261
domain = "", host = "", max_renames = 32768,
153
274
self.server = None
154
275
self.bus = bus
155
276
self.entry_group_state_changed_match = None
277
156
278
def rename(self):
157
279
"""Derived from the Avahi example code"""
158
280
if self.rename_count >= self.max_renames:
164
286
.GetAlternativeServiceName(self.name))
165
287
logger.info("Changing Zeroconf service name to %r ...",
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288
self.name)
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
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' %%(levelname)s: %%(message)s'
170
% self.name))
171
289
self.remove()
172
290
try:
173
291
self.add()
174
292
except dbus.exceptions.DBusException as error:
175
logger.critical("DBusException: %s", error)
293
logger.critical("D-Bus Exception", exc_info=error)
176
294
self.cleanup()
177
295
os._exit(1)
178
296
self.rename_count += 1
297
179
298
def remove(self):
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"""Derived from the Avahi example code"""
181
300
if self.entry_group_state_changed_match is not None:
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302
self.entry_group_state_changed_match = None
184
303
if self.group is not None:
185
304
self.group.Reset()
305
186
306
def add(self):
187
307
"""Derived from the Avahi example code"""
188
308
self.remove()
193
313
avahi.DBUS_INTERFACE_ENTRY_GROUP)
194
314
self.entry_group_state_changed_match = (
195
315
self.group.connect_to_signal(
196
'StateChanged', self .entry_group_state_changed))
316
'StateChanged', self.entry_group_state_changed))
197
317
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
198
318
self.name, self.type)
199
319
self.group.AddService(
205
325
dbus.UInt16(self.port),
206
326
avahi.string_array_to_txt_array(self.TXT))
207
327
self.group.Commit()
328
208
329
def entry_group_state_changed(self, state, error):
209
330
"""Derived from the Avahi example code"""
210
331
logger.debug("Avahi entry group state change: %i", state)
217
338
elif state == avahi.ENTRY_GROUP_FAILURE:
218
339
logger.critical("Avahi: Error in group state changed %s",
219
340
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
341
raise AvahiGroupError("State changed: {0!s}"
342
.format(error))
343
222
344
def cleanup(self):
223
345
"""Derived from the Avahi example code"""
224
346
if self.group is not None:
225
347
try:
226
348
self.group.Free()
227
349
except (dbus.exceptions.UnknownMethodException,
228
dbus.exceptions.DBusException) as e:
350
dbus.exceptions.DBusException):
229
351
pass
230
352
self.group = None
231
353
self.remove()
354
232
355
def server_state_changed(self, state, error=None):
233
356
"""Derived from the Avahi example code"""
234
357
logger.debug("Avahi server state change: %i", state)
253
376
logger.debug("Unknown state: %r", state)
254
377
else:
255
378
logger.debug("Unknown state: %r: %r", state, error)
379
256
380
def activate(self):
257
381
"""Derived from the Avahi example code"""
258
382
if self.server is None:
266
390
self.server_state_changed(self.server.GetState())
267
391
268
392
269
def _timedelta_to_milliseconds(td):
393
class AvahiServiceToSyslog(AvahiService):
394
def rename(self):
395
"""Add the new name to the syslog messages"""
396
ret = AvahiService.rename(self)
397
syslogger.setFormatter(logging.Formatter
398
('Mandos ({0}) [%(process)d]:'
399
' %(levelname)s: %(message)s'
400
.format(self.name)))
401
return ret
402
403
404
def timedelta_to_milliseconds(td):
270
405
"Convert a datetime.timedelta() to milliseconds"
271
406
return ((td.days * 24 * 60 * 60 * 1000)
272
407
+ (td.seconds * 1000)
273
408
+ (td.microseconds // 1000))
274
409
410
275
411
class Client(object):
276
412
"""A representation of a client host served by this server.
277
413
278
414
Attributes:
279
_approved: bool(); 'None' if not yet approved/disapproved
415
approved: bool(); 'None' if not yet approved/disapproved
280
416
approval_delay: datetime.timedelta(); Time to wait for approval
281
417
approval_duration: datetime.timedelta(); Duration of one approval
282
418
checker: subprocess.Popen(); a running checker process used
289
425
instance %(name)s can be used in the command.
290
426
checker_initiator_tag: a gobject event source tag, or None
291
427
created: datetime.datetime(); (UTC) object creation
428
client_structure: Object describing what attributes a client has
429
and is used for storing the client at exit
292
430
current_checker_command: string; current running checker_command
293
disable_hook: If set, called by disable() as disable_hook(self)
294
431
disable_initiator_tag: a gobject event source tag, or None
295
432
enabled: bool()
296
433
fingerprint: string (40 or 32 hexadecimal digits); used to
299
436
interval: datetime.timedelta(); How often to start a new checker
300
437
last_approval_request: datetime.datetime(); (UTC) or None
301
438
last_checked_ok: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
439
last_checker_status: integer between 0 and 255 reflecting exit
440
status of last checker. -1 reflects crashed
441
checker, -2 means no checker completed yet.
442
last_enabled: datetime.datetime(); (UTC) or None
303
443
name: string; from the config file, used in log messages and
304
444
D-Bus identifiers
305
445
secret: bytestring; sent verbatim (over TLS) to client
306
446
timeout: datetime.timedelta(); How long from last_checked_ok
307
447
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
448
extended_timeout: extra long timeout when secret has been sent
309
449
runtime_expansions: Allowed attributes for runtime expansion.
310
450
expires: datetime.datetime(); time (UTC) when a client will be
311
451
disabled, or None
452
server_settings: The server_settings dict from main()
312
453
"""
313
454
314
455
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
456
"created", "enabled", "expires",
457
"fingerprint", "host", "interval",
458
"last_approval_request", "last_checked_ok",
317
459
"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
}
318
470
319
471
def timeout_milliseconds(self):
320
472
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
473
return timedelta_to_milliseconds(self.timeout)
322
474
323
475
def extended_timeout_milliseconds(self):
324
476
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
477
return timedelta_to_milliseconds(self.extended_timeout)
326
478
327
479
def interval_milliseconds(self):
328
480
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
481
return timedelta_to_milliseconds(self.interval)
330
482
331
483
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."""
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):
338
534
self.name = name
339
if config is None:
340
config = {}
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
341
552
logger.debug("Creating client %r", self.name)
342
553
# Uppercase and remove spaces from fingerprint for later
343
554
# comparison purposes with return value from the fingerprint()
344
555
# function
345
self.fingerprint = (config["fingerprint"].upper()
346
.replace(" ", ""))
347
556
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
557
self.created = settings.get("created",
558
datetime.datetime.utcnow())
559
560
# attributes specific for this server instance
369
561
self.checker = None
370
562
self.checker_initiator_tag = None
371
563
self.disable_initiator_tag = None
372
self.expires = None
373
564
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
375
565
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)
566
self.approved = None
380
567
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
568
self.changedstate = (multiprocessing_manager
386
569
.Condition(multiprocessing_manager
387
570
.Lock()))
571
self.client_structure = [attr for attr in
572
self.__dict__.iterkeys()
573
if not attr.startswith("_")]
574
self.client_structure.append("client_structure")
575
576
for name, t in inspect.getmembers(type(self),
577
lambda obj:
578
isinstance(obj,
579
property)):
580
if not name.startswith("_"):
581
self.client_structure.append(name)
388
582
583
# Send notice to process children that client state has changed
389
584
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
585
with self.changedstate:
586
self.changedstate.notify_all()
393
587
394
588
def enable(self):
395
589
"""Start this client's checker and timeout hooks"""
396
590
if getattr(self, "enabled", False):
397
591
# Already enabled
398
592
return
593
self.expires = datetime.datetime.utcnow() + self.timeout
594
self.enabled = True
595
self.last_enabled = datetime.datetime.utcnow()
596
self.init_checker()
399
597
self.send_changedstate()
598
599
def disable(self, quiet=True):
600
"""Disable this client."""
601
if not getattr(self, "enabled", False):
602
return False
603
if not quiet:
604
logger.info("Disabling client %s", self.name)
605
if getattr(self, "disable_initiator_tag", None) is not None:
606
gobject.source_remove(self.disable_initiator_tag)
607
self.disable_initiator_tag = None
608
self.expires = None
609
if getattr(self, "checker_initiator_tag", None) is not None:
610
gobject.source_remove(self.checker_initiator_tag)
611
self.checker_initiator_tag = None
612
self.stop_checker()
613
self.enabled = False
614
if not quiet:
615
self.send_changedstate()
616
# Do not run this again if called by a gobject.timeout_add
617
return False
618
619
def __del__(self):
620
self.disable()
621
622
def init_checker(self):
400
623
# Schedule a new checker to be started an 'interval' from now,
401
624
# and every interval from then on.
625
if self.checker_initiator_tag is not None:
626
gobject.source_remove(self.checker_initiator_tag)
402
627
self.checker_initiator_tag = (gobject.timeout_add
403
628
(self.interval_milliseconds(),
404
629
self.start_checker))
405
630
# Schedule a disable() when 'timeout' has passed
406
self.expires = datetime.datetime.utcnow() + self.timeout
631
if self.disable_initiator_tag is not None:
632
gobject.source_remove(self.disable_initiator_tag)
407
633
self.disable_initiator_tag = (gobject.timeout_add
408
634
(self.timeout_milliseconds(),
409
635
self.disable))
410
self.enabled = True
411
self.last_enabled = datetime.datetime.utcnow()
412
636
# Also start a new checker *right now*.
413
637
self.start_checker()
414
638
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
639
def checker_callback(self, pid, condition, command):
442
640
"""The checker has completed, so take appropriate actions."""
443
641
self.checker_callback_tag = None
444
642
self.checker = None
445
643
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
644
self.last_checker_status = os.WEXITSTATUS(condition)
645
if self.last_checker_status == 0:
448
646
logger.info("Checker for %(name)s succeeded",
449
647
vars(self))
450
648
self.checked_ok()
452
650
logger.info("Checker for %(name)s failed",
453
651
vars(self))
454
652
else:
653
self.last_checker_status = -1
455
654
logger.warning("Checker for %(name)s crashed?",
456
655
vars(self))
457
656
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
"""
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."""
464
665
if timeout is None:
465
666
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
gobject.source_remove(self.disable_initiator_tag)
468
self.expires = datetime.datetime.utcnow() + timeout
469
self.disable_initiator_tag = (gobject.timeout_add
470
(_timedelta_to_milliseconds
471
(timeout), self.disable))
667
if self.disable_initiator_tag is not None:
668
gobject.source_remove(self.disable_initiator_tag)
669
self.disable_initiator_tag = None
670
if getattr(self, "enabled", False):
671
self.disable_initiator_tag = (gobject.timeout_add
672
(timedelta_to_milliseconds
673
(timeout), self.disable))
674
self.expires = datetime.datetime.utcnow() + timeout
472
675
473
676
def need_approval(self):
474
677
self.last_approval_request = datetime.datetime.utcnow()
479
682
If a checker already exists, leave it running and do
480
683
nothing."""
481
684
# 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
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
486
689
# checkers alone, the checker would have to take more time
487
690
# than 'timeout' for the client to be disabled, which is as it
488
691
# should be.
490
693
# If a checker exists, make sure it is not a zombie
491
694
try:
492
695
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
696
except AttributeError:
697
pass
698
except OSError as error:
699
if error.errno != errno.ECHILD:
700
raise
497
701
else:
498
702
if pid:
499
703
logger.warning("Checker was a zombie")
502
706
self.current_checker_command)
503
707
# Start a new checker if needed
504
708
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)
505
714
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
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
524
720
self.current_checker_command = command
525
721
try:
526
722
logger.info("Starting checker %r for %s",
529
725
# in normal mode, that is already done by daemon(),
530
726
# and in debug mode we don't want to. (Stdin is
531
727
# 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 })
532
736
self.checker = subprocess.Popen(command,
533
737
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.
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:
541
751
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
752
except OSError as error:
546
logger.error("Failed to start subprocess: %s",
547
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)
548
762
# Re-run this periodically if run by gobject.timeout_add
549
763
return True
550
764
557
771
return
558
772
logger.debug("Stopping checker for %(name)s", vars(self))
559
773
try:
560
os.kill(self.checker.pid, signal.SIGTERM)
774
self.checker.terminate()
561
775
#time.sleep(0.5)
562
776
#if self.checker.poll() is None:
563
# os.kill(self.checker.pid, signal.SIGKILL)
777
# self.checker.kill()
564
778
except OSError as error:
565
779
if error.errno != errno.ESRCH: # No such process
566
780
raise
583
797
# "Set" method, so we fail early here:
584
798
if byte_arrays and signature != "ay":
585
799
raise ValueError("Byte arrays not supported for non-'ay'"
586
" signature %r" % signature)
800
" signature {0!r}".format(signature))
587
801
def decorator(func):
588
802
func._dbus_is_property = True
589
803
func._dbus_interface = dbus_interface
597
811
return decorator
598
812
599
813
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
600
851
class DBusPropertyException(dbus.exceptions.DBusException):
601
852
"""A base class for D-Bus property-related exceptions
602
853
"""
625
876
"""
626
877
627
878
@staticmethod
628
def _is_dbus_property(obj):
629
return getattr(obj, "_dbus_is_property", False)
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)
630
887
631
def _get_all_dbus_properties(self):
888
def _get_all_dbus_things(self, thing):
632
889
"""Returns a generator of (name, attribute) pairs
633
890
"""
634
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
891
return ((getattr(athing.__get__(self), "_dbus_name",
892
name),
893
athing.__get__(self))
635
894
for cls in self.__class__.__mro__
636
for name, prop in
637
inspect.getmembers(cls, self._is_dbus_property))
895
for name, athing in
896
inspect.getmembers(cls,
897
self._is_dbus_thing(thing)))
638
898
639
899
def _get_dbus_property(self, interface_name, property_name):
640
900
"""Returns a bound method if one exists which is a D-Bus
642
902
"""
643
903
for cls in self.__class__.__mro__:
644
904
for name, value in (inspect.getmembers
645
(cls, self._is_dbus_property)):
905
(cls,
906
self._is_dbus_thing("property"))):
646
907
if (value._dbus_name == property_name
647
908
and value._dbus_interface == interface_name):
648
909
return value.__get__(self)
676
937
# The byte_arrays option is not supported yet on
677
938
# signatures other than "ay".
678
939
if prop._dbus_signature != "ay":
679
raise ValueError
680
value = dbus.ByteArray(''.join(unichr(byte)
681
for byte in value))
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))
682
945
prop(value)
683
946
684
947
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
689
952
690
953
Note: Will not include properties with access="write".
691
954
"""
692
all = {}
693
for name, prop in self._get_all_dbus_properties():
955
properties = {}
956
for name, prop in self._get_all_dbus_things("property"):
694
957
if (interface_name
695
958
and interface_name != prop._dbus_interface):
696
959
# Interface non-empty but did not match
700
963
continue
701
964
value = prop()
702
965
if not hasattr(value, "variant_level"):
703
all[name] = value
966
properties[name] = value
704
967
continue
705
all[name] = type(value)(value, variant_level=
706
value.variant_level+1)
707
return dbus.Dictionary(all, signature="sv")
968
properties[name] = type(value)(value, variant_level=
969
value.variant_level+1)
970
return dbus.Dictionary(properties, signature="sv")
708
971
709
972
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
710
973
out_signature="s",
711
974
path_keyword='object_path',
712
975
connection_keyword='connection')
713
976
def Introspect(self, object_path, connection):
714
"""Standard D-Bus method, overloaded to insert property tags.
977
"""Overloading of standard D-Bus method.
978
979
Inserts property tags and interface annotation tags.
715
980
"""
716
981
xmlstring = dbus.service.Object.Introspect(self, object_path,
717
982
connection)
724
989
e.setAttribute("access", prop._dbus_access)
725
990
return e
726
991
for if_tag in document.getElementsByTagName("interface"):
992
# Add property tags
727
993
for tag in (make_tag(document, name, prop)
728
994
for name, prop
729
in self._get_all_dbus_properties()
995
in self._get_all_dbus_things("property")
730
996
if prop._dbus_interface
731
997
== if_tag.getAttribute("name")):
732
998
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)
733
1030
# Add the names to the return values for the
734
1031
# "org.freedesktop.DBus.Properties" methods
735
1032
if (if_tag.getAttribute("name")
750
1047
except (AttributeError, xml.dom.DOMException,
751
1048
xml.parsers.expat.ExpatError) as error:
752
1049
logger.error("Failed to override Introspection method",
753
error)
1050
exc_info=error)
754
1051
return xmlstring
755
1052
756
1053
757
def datetime_to_dbus (dt, variant_level=0):
1054
def datetime_to_dbus(dt, variant_level=0):
758
1055
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
1056
if dt is None:
760
1057
return dbus.String("", variant_level = variant_level)
761
1058
return dbus.String(dt.isoformat(),
762
1059
variant_level=variant_level)
763
1060
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.
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).
768
1084
"""
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):
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):
776
1092
# Ignore non-D-Bus attributes, and D-Bus attributes
777
1093
# with the wrong interface name
778
1094
if (not hasattr(attribute, "_dbus_interface")
779
1095
or not attribute._dbus_interface
780
.startswith("se.recompile.Mandos")):
1096
.startswith(orig_interface_name)):
781
1097
continue
782
1098
# Create an alternate D-Bus interface name based on
783
1099
# the current name
784
1100
alt_interface = (attribute._dbus_interface
785
.replace("se.recompile.Mandos",
786
"se.bsnet.fukt.Mandos"))
1101
.replace(orig_interface_name,
1102
alt_interface_name))
1103
interface_names.add(alt_interface)
787
1104
# Is this a D-Bus signal?
788
1105
if getattr(attribute, "_dbus_is_signal", False):
789
# Extract the original non-method function by
790
# black magic
1106
# Extract the original non-method undecorated
1107
# function by black magic
791
1108
nonmethod_func = (dict(
792
1109
zip(attribute.func_code.co_freevars,
793
1110
attribute.__closure__))["func"]
804
1121
nonmethod_func.func_name,
805
1122
nonmethod_func.func_defaults,
806
1123
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
807
1130
# 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
1131
# original and alternate functions, so both the
1132
# original and alternate signals gets sent when
1133
# the function is called
810
1134
def fixscope(func1, func2):
811
1135
"""This function is a scope container to pass
812
1136
func1 and func2 to the "call_both" function
819
1143
return call_both
820
1144
# Create the "call_both" function and add it to
821
1145
# the class
822
attr[attrname] = fixscope(attribute,
823
new_function)
1146
attr[attrname] = fixscope(attribute, new_function)
824
1147
# Is this a D-Bus method?
825
1148
elif getattr(attribute, "_dbus_is_method", False):
826
1149
# Create a new, but exactly alike, function
837
1160
attribute.func_name,
838
1161
attribute.func_defaults,
839
1162
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
840
1169
# Is this a D-Bus property?
841
1170
elif getattr(attribute, "_dbus_is_property", False):
842
1171
# Create a new, but exactly alike, function
856
1185
attribute.func_name,
857
1186
attribute.func_defaults,
858
1187
attribute.func_closure)))
859
return type.__new__(mcs, name, bases, attr)
860
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"})
861
1233
class ClientDBus(Client, DBusObjectWithProperties):
862
1234
"""A Client class using D-Bus
863
1235
872
1244
# dbus.service.Object doesn't use super(), so we can't either.
873
1245
874
1246
def __init__(self, bus = None, *args, **kwargs):
875
self._approvals_pending = 0
876
1247
self.bus = bus
877
1248
Client.__init__(self, *args, **kwargs)
878
1249
# Only now, when this client is initialized, can it show up on
884
1255
("/clients/" + client_object_name))
885
1256
DBusObjectWithProperties.__init__(self, self.bus,
886
1257
self.dbus_object_path)
887
1258
888
1259
def notifychangeproperty(transform_func,
889
1260
dbus_name, type_func=lambda x: x,
890
1261
variant_level=1):
891
1262
""" Modify a variable so that it's a property which announces
892
1263
its changes to DBus.
893
894
transform_fun: Function that takes a value and transforms it
895
to a D-Bus type.
1264
1265
transform_fun: Function that takes a value and a variant_level
1266
and transforms it to a D-Bus type.
896
1267
dbus_name: D-Bus name of the variable
897
1268
type_func: Function that transform the value before sending it
898
1269
to the D-Bus. Default: no transform
905
1276
type_func(getattr(self, attrname, None))
906
1277
!= type_func(value)):
907
1278
dbus_value = transform_func(type_func(value),
908
variant_level)
1279
variant_level
1280
=variant_level)
909
1281
self.PropertyChanged(dbus.String(dbus_name),
910
1282
dbus_value)
911
1283
setattr(self, attrname, value)
912
1284
913
1285
return property(lambda self: getattr(self, attrname), setter)
914
1286
915
916
1287
expires = notifychangeproperty(datetime_to_dbus, "Expires")
917
1288
approvals_pending = notifychangeproperty(dbus.Boolean,
918
1289
"ApprovalPending",
925
1296
checker is not None)
926
1297
last_checked_ok = notifychangeproperty(datetime_to_dbus,
927
1298
"LastCheckedOK")
1299
last_checker_status = notifychangeproperty(dbus.Int16,
1300
"LastCheckerStatus")
928
1301
last_approval_request = notifychangeproperty(
929
1302
datetime_to_dbus, "LastApprovalRequest")
930
1303
approved_by_default = notifychangeproperty(dbus.Boolean,
931
1304
"ApprovedByDefault")
932
approval_delay = notifychangeproperty(dbus.UInt16,
1305
approval_delay = notifychangeproperty(dbus.UInt64,
933
1306
"ApprovalDelay",
934
1307
type_func =
935
_timedelta_to_milliseconds)
1308
timedelta_to_milliseconds)
936
1309
approval_duration = notifychangeproperty(
937
dbus.UInt16, "ApprovalDuration",
938
type_func = _timedelta_to_milliseconds)
1310
dbus.UInt64, "ApprovalDuration",
1311
type_func = timedelta_to_milliseconds)
939
1312
host = notifychangeproperty(dbus.String, "Host")
940
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1313
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
941
1314
type_func =
942
_timedelta_to_milliseconds)
1315
timedelta_to_milliseconds)
943
1316
extended_timeout = notifychangeproperty(
944
dbus.UInt16, "ExtendedTimeout",
945
type_func = _timedelta_to_milliseconds)
946
interval = notifychangeproperty(dbus.UInt16,
1317
dbus.UInt64, "ExtendedTimeout",
1318
type_func = timedelta_to_milliseconds)
1319
interval = notifychangeproperty(dbus.UInt64,
947
1320
"Interval",
948
1321
type_func =
949
_timedelta_to_milliseconds)
1322
timedelta_to_milliseconds)
950
1323
checker_command = notifychangeproperty(dbus.String, "Checker")
951
1324
952
1325
del notifychangeproperty
980
1353
*args, **kwargs)
981
1354
982
1355
def start_checker(self, *args, **kwargs):
983
old_checker = self.checker
984
if self.checker is not None:
985
old_checker_pid = self.checker.pid
986
else:
987
old_checker_pid = None
1356
old_checker_pid = getattr(self.checker, "pid", None)
988
1357
r = Client.start_checker(self, *args, **kwargs)
989
1358
# Only if new checker process was started
990
1359
if (self.checker is not None
994
1363
return r
995
1364
996
1365
def _reset_approved(self):
997
self._approved = None
1366
self.approved = None
998
1367
return False
999
1368
1000
1369
def approve(self, value=True):
1001
self.send_changedstate()
1002
self._approved = value
1003
gobject.timeout_add(_timedelta_to_milliseconds
1370
self.approved = value
1371
gobject.timeout_add(timedelta_to_milliseconds
1004
1372
(self.approval_duration),
1005
1373
self._reset_approved)
1006
1374
self.send_changedstate()
1007
1375
1008
1376
## D-Bus methods, signals & properties
1009
1377
_interface = "se.recompile.Mandos.Client"
1010
1378
1379
## Interfaces
1380
1381
@dbus_interface_annotations(_interface)
1382
def _foo(self):
1383
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1384
"false"}
1385
1011
1386
## Signals
1012
1387
1013
1388
# CheckerCompleted - signal
1112
1487
access="readwrite")
1113
1488
def ApprovalDuration_dbus_property(self, value=None):
1114
1489
if value is None: # get
1115
return dbus.UInt64(_timedelta_to_milliseconds(
1490
return dbus.UInt64(timedelta_to_milliseconds(
1116
1491
self.approval_duration))
1117
1492
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1118
1493
1132
1507
def Host_dbus_property(self, value=None):
1133
1508
if value is None: # get
1134
1509
return dbus.String(self.host)
1135
self.host = value
1510
self.host = unicode(value)
1136
1511
1137
1512
# Created - property
1138
1513
@dbus_service_property(_interface, signature="s", access="read")
1139
1514
def Created_dbus_property(self):
1140
return dbus.String(datetime_to_dbus(self.created))
1515
return datetime_to_dbus(self.created)
1141
1516
1142
1517
# LastEnabled - property
1143
1518
@dbus_service_property(_interface, signature="s", access="read")
1164
1539
return
1165
1540
return datetime_to_dbus(self.last_checked_ok)
1166
1541
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
1167
1548
# Expires - property
1168
1549
@dbus_service_property(_interface, signature="s", access="read")
1169
1550
def Expires_dbus_property(self):
1180
1561
def Timeout_dbus_property(self, value=None):
1181
1562
if value is None: # get
1182
1563
return dbus.UInt64(self.timeout_milliseconds())
1564
old_timeout = self.timeout
1183
1565
self.timeout = datetime.timedelta(0, 0, 0, value)
1184
if getattr(self, "disable_initiator_tag", None) is None:
1185
return
1186
# Reschedule timeout
1187
gobject.source_remove(self.disable_initiator_tag)
1188
self.disable_initiator_tag = None
1189
self.expires = None
1190
time_to_die = (self.
1191
_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))
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))
1205
1582
1206
1583
# ExtendedTimeout - property
1207
1584
@dbus_service_property(_interface, signature="t",
1220
1597
self.interval = datetime.timedelta(0, 0, 0, value)
1221
1598
if getattr(self, "checker_initiator_tag", None) is None:
1222
1599
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
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
1228
1606
1229
1607
# Checker - property
1230
1608
@dbus_service_property(_interface, signature="s",
1232
1610
def Checker_dbus_property(self, value=None):
1233
1611
if value is None: # get
1234
1612
return dbus.String(self.checker_command)
1235
self.checker_command = value
1613
self.checker_command = unicode(value)
1236
1614
1237
1615
# CheckerRunning - property
1238
1616
@dbus_service_property(_interface, signature="b",
1267
1645
raise KeyError()
1268
1646
1269
1647
def __getattribute__(self, name):
1270
if(name == '_pipe'):
1648
if name == '_pipe':
1271
1649
return super(ProxyClient, self).__getattribute__(name)
1272
1650
self._pipe.send(('getattr', name))
1273
1651
data = self._pipe.recv()
1280
1658
return func
1281
1659
1282
1660
def __setattr__(self, name, value):
1283
if(name == '_pipe'):
1661
if name == '_pipe':
1284
1662
return super(ProxyClient, self).__setattr__(name, value)
1285
1663
self._pipe.send(('setattr', name, value))
1286
1664
1287
class ClientDBusTransitional(ClientDBus):
1288
__metaclass__ = AlternateDBusNamesMetaclass
1289
1665
1290
1666
class ClientHandler(socketserver.BaseRequestHandler, object):
1291
1667
"""A class to handle client connections.
1328
1704
logger.debug("Protocol version: %r", line)
1329
1705
try:
1330
1706
if int(line.strip().split()[0]) > 1:
1331
raise RuntimeError
1707
raise RuntimeError(line)
1332
1708
except (ValueError, IndexError, RuntimeError) as error:
1333
1709
logger.error("Unknown protocol version: %s", error)
1334
1710
return
1374
1750
client.Rejected("Disabled")
1375
1751
return
1376
1752
1377
if client._approved or not client.approval_delay:
1753
if client.approved or not client.approval_delay:
1378
1754
#We are approved or approval is disabled
1379
1755
break
1380
elif client._approved is None:
1756
elif client.approved is None:
1381
1757
logger.info("Client %s needs approval",
1382
1758
client.name)
1383
1759
if self.server.use_dbus:
1394
1770
return
1395
1771
1396
1772
#wait until timeout or approved
1397
#x = float(client
1398
# ._timedelta_to_milliseconds(delay))
1399
1773
time = datetime.datetime.now()
1400
1774
client.changedstate.acquire()
1401
(client.changedstate.wait
1402
(float(client._timedelta_to_milliseconds(delay)
1403
/ 1000)))
1775
client.changedstate.wait(
1776
float(timedelta_to_milliseconds(delay)
1777
/ 1000))
1404
1778
client.changedstate.release()
1405
1779
time2 = datetime.datetime.now()
1406
1780
if (time2 - time) >= delay:
1422
1796
try:
1423
1797
sent = session.send(client.secret[sent_size:])
1424
1798
except gnutls.errors.GNUTLSError as error:
1425
logger.warning("gnutls send failed")
1799
logger.warning("gnutls send failed",
1800
exc_info=error)
1426
1801
return
1427
1802
logger.debug("Sent: %d, remaining: %d",
1428
1803
sent, len(client.secret)
1430
1805
sent_size += sent
1431
1806
1432
1807
logger.info("Sending secret to %s", client.name)
1433
# bump the timeout as if seen
1434
client.checked_ok(client.extended_timeout)
1808
# bump the timeout using extended_timeout
1809
client.bump_timeout(client.extended_timeout)
1435
1810
if self.server.use_dbus:
1436
1811
# Emit D-Bus signal
1437
1812
client.GotSecret()
1442
1817
try:
1443
1818
session.bye()
1444
1819
except gnutls.errors.GNUTLSError as error:
1445
logger.warning("GnuTLS bye failed")
1820
logger.warning("GnuTLS bye failed",
1821
exc_info=error)
1446
1822
1447
1823
@staticmethod
1448
1824
def peer_certificate(session):
1504
1880
# Convert the buffer to a Python bytestring
1505
1881
fpr = ctypes.string_at(buf, buf_len.value)
1506
1882
# Convert the bytestring to hexadecimal notation
1507
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1883
hex_fpr = binascii.hexlify(fpr).upper()
1508
1884
return hex_fpr
1509
1885
1510
1886
1513
1889
def sub_process_main(self, request, address):
1514
1890
try:
1515
1891
self.finish_request(request, address)
1516
except:
1892
except Exception:
1517
1893
self.handle_error(request, address)
1518
1894
self.close_request(request)
1519
1895
1520
1896
def process_request(self, request, address):
1521
1897
"""Start a new process to process the request."""
1522
multiprocessing.Process(target = self.sub_process_main,
1523
args = (request, address)).start()
1898
proc = multiprocessing.Process(target = self.sub_process_main,
1899
args = (request, address))
1900
proc.start()
1901
return proc
1524
1902
1525
1903
1526
1904
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1532
1910
"""
1533
1911
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1534
1912
1535
super(MultiprocessingMixInWithPipe,
1536
self).process_request(request, client_address)
1913
proc = MultiprocessingMixIn.process_request(self, request,
1914
client_address)
1537
1915
self.child_pipe.close()
1538
self.add_pipe(parent_pipe)
1916
self.add_pipe(parent_pipe, proc)
1539
1917
1540
def add_pipe(self, parent_pipe):
1918
def add_pipe(self, parent_pipe, proc):
1541
1919
"""Dummy function; override as necessary"""
1542
raise NotImplementedError
1920
raise NotImplementedError()
1543
1921
1544
1922
1545
1923
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1552
1930
use_ipv6: Boolean; to use IPv6 or not
1553
1931
"""
1554
1932
def __init__(self, server_address, RequestHandlerClass,
1555
interface=None, use_ipv6=True):
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
"""
1556
1937
self.interface = interface
1557
1938
if use_ipv6:
1558
1939
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.
1559
1966
socketserver.TCPServer.__init__(self, server_address,
1560
1967
RequestHandlerClass)
1968
1561
1969
def server_bind(self):
1562
1970
"""This overrides the normal server_bind() function
1563
1971
to bind to an interface if one was specified, and also NOT to
1571
1979
try:
1572
1980
self.socket.setsockopt(socket.SOL_SOCKET,
1573
1981
SO_BINDTODEVICE,
1574
str(self.interface
1575
+ '\0'))
1982
str(self.interface + '\0'))
1576
1983
except socket.error as error:
1577
if error[0] == errno.EPERM:
1578
logger.error("No permission to"
1579
" bind to interface %s",
1580
self.interface)
1581
elif error[0] == errno.ENOPROTOOPT:
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:
1582
1988
logger.error("SO_BINDTODEVICE not available;"
1583
1989
" cannot bind to interface %s",
1584
1990
self.interface)
1991
elif error.errno == errno.ENODEV:
1992
logger.error("Interface %s does not exist,"
1993
" cannot bind", self.interface)
1585
1994
else:
1586
1995
raise
1587
1996
# Only bind(2) the socket if we really need to.
1590
1999
if self.address_family == socket.AF_INET6:
1591
2000
any_address = "::" # in6addr_any
1592
2001
else:
1593
any_address = socket.INADDR_ANY
2002
any_address = "0.0.0.0" # INADDR_ANY
1594
2003
self.server_address = (any_address,
1595
2004
self.server_address[1])
1596
2005
elif not self.server_address[1]:
1617
2026
"""
1618
2027
def __init__(self, server_address, RequestHandlerClass,
1619
2028
interface=None, use_ipv6=True, clients=None,
1620
gnutls_priority=None, use_dbus=True):
2029
gnutls_priority=None, use_dbus=True, socketfd=None):
1621
2030
self.enabled = False
1622
2031
self.clients = clients
1623
2032
if self.clients is None:
1624
self.clients = set()
2033
self.clients = {}
1625
2034
self.use_dbus = use_dbus
1626
2035
self.gnutls_priority = gnutls_priority
1627
2036
IPv6_TCPServer.__init__(self, server_address,
1628
2037
RequestHandlerClass,
1629
2038
interface = interface,
1630
use_ipv6 = use_ipv6)
2039
use_ipv6 = use_ipv6,
2040
socketfd = socketfd)
1631
2041
def server_activate(self):
1632
2042
if self.enabled:
1633
2043
return socketserver.TCPServer.server_activate(self)
2044
1634
2045
def enable(self):
1635
2046
self.enabled = True
1636
def add_pipe(self, parent_pipe):
2047
2048
def add_pipe(self, parent_pipe, proc):
1637
2049
# Call "handle_ipc" for both data and EOF events
1638
2050
gobject.io_add_watch(parent_pipe.fileno(),
1639
2051
gobject.IO_IN | gobject.IO_HUP,
1640
2052
functools.partial(self.handle_ipc,
1641
2053
parent_pipe =
1642
parent_pipe))
1643
2054
parent_pipe,
2055
proc = proc))
2056
1644
2057
def handle_ipc(self, source, condition, parent_pipe=None,
1645
client_object=None):
1646
condition_names = {
1647
gobject.IO_IN: "IN", # There is data to read.
1648
gobject.IO_OUT: "OUT", # Data can be written (without
1649
# blocking).
1650
gobject.IO_PRI: "PRI", # There is urgent data to read.
1651
gobject.IO_ERR: "ERR", # Error condition.
1652
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1653
# broken, usually for pipes and
1654
# sockets).
1655
}
1656
conditions_string = ' | '.join(name
1657
for cond, name in
1658
condition_names.iteritems()
1659
if cond & condition)
1660
# error or the other end of multiprocessing.Pipe has closed
1661
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2058
proc = None, client_object=None):
2059
# error, or the other end of multiprocessing.Pipe has closed
2060
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2061
# Wait for other process to exit
2062
proc.join()
1662
2063
return False
1663
2064
1664
2065
# Read a request from the child
1669
2070
fpr = request[1]
1670
2071
address = request[2]
1671
2072
1672
for c in self.clients:
2073
for c in self.clients.itervalues():
1673
2074
if c.fingerprint == fpr:
1674
2075
client = c
1675
2076
break
1688
2089
functools.partial(self.handle_ipc,
1689
2090
parent_pipe =
1690
2091
parent_pipe,
2092
proc = proc,
1691
2093
client_object =
1692
2094
client))
1693
2095
parent_pipe.send(True)
1719
2121
return True
1720
2122
1721
2123
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
1722
2223
def string_to_delta(interval):
1723
2224
"""Parse a string and return a datetime.timedelta
1724
2225
1735
2236
>>> string_to_delta('5m 30s')
1736
2237
datetime.timedelta(0, 330)
1737
2238
"""
2239
2240
try:
2241
return rfc3339_duration_to_delta(interval)
2242
except ValueError:
2243
pass
2244
1738
2245
timevalue = datetime.timedelta(0)
1739
2246
for s in interval.split():
1740
2247
try:
1751
2258
elif suffix == "w":
1752
2259
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1753
2260
else:
1754
raise ValueError("Unknown suffix %r" % suffix)
1755
except (ValueError, IndexError) as e:
2261
raise ValueError("Unknown suffix {0!r}"
2262
.format(suffix))
2263
except IndexError as e:
1756
2264
raise ValueError(*(e.args))
1757
2265
timevalue += delta
1758
2266
return timevalue
1759
2267
1760
2268
1761
def if_nametoindex(interface):
1762
"""Call the C function if_nametoindex(), or equivalent
1763
1764
Note: This function cannot accept a unicode string."""
1765
global if_nametoindex
1766
try:
1767
if_nametoindex = (ctypes.cdll.LoadLibrary
1768
(ctypes.util.find_library("c"))
1769
.if_nametoindex)
1770
except (OSError, AttributeError):
1771
logger.warning("Doing if_nametoindex the hard way")
1772
def if_nametoindex(interface):
1773
"Get an interface index the hard way, i.e. using fcntl()"
1774
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1775
with contextlib.closing(socket.socket()) as s:
1776
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1777
struct.pack(str("16s16x"),
1778
interface))
1779
interface_index = struct.unpack(str("I"),
1780
ifreq[16:20])[0]
1781
return interface_index
1782
return if_nametoindex(interface)
1783
1784
1785
2269
def daemon(nochdir = False, noclose = False):
1786
2270
"""See daemon(3). Standard BSD Unix function.
1787
2271
1795
2279
sys.exit()
1796
2280
if not noclose:
1797
2281
# Close all standard open file descriptors
1798
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2282
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1799
2283
if not stat.S_ISCHR(os.fstat(null).st_mode):
1800
2284
raise OSError(errno.ENODEV,
1801
"%s not a character device"
1802
% os.path.devnull)
2285
"{0} not a character device"
2286
.format(os.devnull))
1803
2287
os.dup2(null, sys.stdin.fileno())
1804
2288
os.dup2(null, sys.stdout.fileno())
1805
2289
os.dup2(null, sys.stderr.fileno())
1814
2298
1815
2299
parser = argparse.ArgumentParser()
1816
2300
parser.add_argument("-v", "--version", action="version",
1817
version = "%%(prog)s %s" % version,
2301
version = "%(prog)s {0}".format(version),
1818
2302
help="show version number and exit")
1819
2303
parser.add_argument("-i", "--interface", metavar="IF",
1820
2304
help="Bind to interface IF")
1826
2310
help="Run self-test")
1827
2311
parser.add_argument("--debug", action="store_true",
1828
2312
help="Debug mode; run in foreground and log"
1829
" to terminal")
2313
" to terminal", default=None)
1830
2314
parser.add_argument("--debuglevel", metavar="LEVEL",
1831
2315
help="Debug level for stdout output")
1832
2316
parser.add_argument("--priority", help="GnuTLS"
1839
2323
" files")
1840
2324
parser.add_argument("--no-dbus", action="store_false",
1841
2325
dest="use_dbus", help="Do not provide D-Bus"
1842
" system bus interface")
2326
" system bus interface", default=None)
1843
2327
parser.add_argument("--no-ipv6", action="store_false",
1844
dest="use_ipv6", help="Do not use IPv6")
2328
dest="use_ipv6", help="Do not use IPv6",
2329
default=None)
2330
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
1845
2344
options = parser.parse_args()
1846
2345
1847
2346
if options.check:
1848
2347
import doctest
1849
doctest.testmod()
1850
sys.exit()
2348
fail_count, test_count = doctest.testmod()
2349
sys.exit(os.EX_OK if fail_count == 0 else 1)
1851
2350
1852
2351
# Default values for config file for server-global settings
1853
2352
server_defaults = { "interface": "",
1855
2354
"port": "",
1856
2355
"debug": "False",
1857
2356
"priority":
1858
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2357
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1859
2358
"servicename": "Mandos",
1860
2359
"use_dbus": "True",
1861
2360
"use_ipv6": "True",
1862
2361
"debuglevel": "",
2362
"restore": "True",
2363
"socket": "",
2364
"statedir": "/var/lib/mandos",
2365
"foreground": "False",
2366
"zeroconf": "True",
1863
2367
}
1864
2368
1865
2369
# Parse config file for server-global settings
1870
2374
# Convert the SafeConfigParser object to a dict
1871
2375
server_settings = server_config.defaults()
1872
2376
# Use the appropriate methods on the non-string config options
1873
for option in ("debug", "use_dbus", "use_ipv6"):
2377
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1874
2378
server_settings[option] = server_config.getboolean("DEFAULT",
1875
2379
option)
1876
2380
if server_settings["port"]:
1877
2381
server_settings["port"] = server_config.getint("DEFAULT",
1878
2382
"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"])
1879
2392
del server_config
1880
2393
1881
2394
# Override the settings from the config file with command line
1882
2395
# options, if set.
1883
2396
for option in ("interface", "address", "port", "debug",
1884
2397
"priority", "servicename", "configdir",
1885
"use_dbus", "use_ipv6", "debuglevel"):
2398
"use_dbus", "use_ipv6", "debuglevel", "restore",
2399
"statedir", "socket", "foreground", "zeroconf"):
1886
2400
value = getattr(options, option)
1887
2401
if value is not None:
1888
2402
server_settings[option] = value
1891
2405
for option in server_settings.keys():
1892
2406
if type(server_settings[option]) is str:
1893
2407
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
1894
2415
# Now we have our good server settings in "server_settings"
1895
2416
1896
2417
##################################################################
1897
2418
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
1898
2425
# For convenience
1899
2426
debug = server_settings["debug"]
1900
2427
debuglevel = server_settings["debuglevel"]
1901
2428
use_dbus = server_settings["use_dbus"]
1902
2429
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)
1903
2443
1904
2444
if server_settings["servicename"] != "Mandos":
1905
2445
syslogger.setFormatter(logging.Formatter
1906
('Mandos (%s) [%%(process)d]:'
1907
' %%(levelname)s: %%(message)s'
1908
% server_settings["servicename"]))
2446
('Mandos ({0}) [%(process)d]:'
2447
' %(levelname)s: %(message)s'
2448
.format(server_settings
2449
["servicename"])))
1909
2450
1910
2451
# Parse config file with clients
1911
client_defaults = { "timeout": "5m",
1912
"extended_timeout": "15m",
1913
"interval": "2m",
1914
"checker": "fping -q -- %%(host)s",
1915
"host": "",
1916
"approval_delay": "0s",
1917
"approval_duration": "1s",
1918
}
1919
client_config = configparser.SafeConfigParser(client_defaults)
2452
client_config = configparser.SafeConfigParser(Client
2453
.client_defaults)
1920
2454
client_config.read(os.path.join(server_settings["configdir"],
1921
2455
"clients.conf"))
1922
2456
1923
2457
global mandos_dbus_service
1924
2458
mandos_dbus_service = None
1925
2459
2460
socketfd = None
2461
if server_settings["socket"] != "":
2462
socketfd = server_settings["socket"]
1926
2463
tcp_server = MandosServer((server_settings["address"],
1927
2464
server_settings["port"]),
1928
2465
ClientHandler,
1931
2468
use_ipv6=use_ipv6,
1932
2469
gnutls_priority=
1933
2470
server_settings["priority"],
1934
use_dbus=use_dbus)
1935
if not debug:
1936
pidfilename = "/var/run/mandos.pid"
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
1937
2478
try:
1938
2479
pidfile = open(pidfilename, "w")
1939
except IOError:
1940
logger.error("Could not open file %r", pidfilename)
2480
except IOError as e:
2481
logger.error("Could not open file %r", pidfilename,
2482
exc_info=e)
1941
2483
1942
try:
1943
uid = pwd.getpwnam("_mandos").pw_uid
1944
gid = pwd.getpwnam("_mandos").pw_gid
1945
except KeyError:
2484
for name in ("_mandos", "mandos", "nobody"):
1946
2485
try:
1947
uid = pwd.getpwnam("mandos").pw_uid
1948
gid = pwd.getpwnam("mandos").pw_gid
2486
uid = pwd.getpwnam(name).pw_uid
2487
gid = pwd.getpwnam(name).pw_gid
2488
break
1949
2489
except KeyError:
1950
try:
1951
uid = pwd.getpwnam("nobody").pw_uid
1952
gid = pwd.getpwnam("nobody").pw_gid
1953
except KeyError:
1954
uid = 65534
1955
gid = 65534
2490
continue
2491
else:
2492
uid = 65534
2493
gid = 65534
1956
2494
try:
1957
2495
os.setgid(gid)
1958
2496
os.setuid(uid)
1959
2497
except OSError as error:
1960
if error[0] != errno.EPERM:
1961
raise error
1962
1963
if not debug and not debuglevel:
1964
syslogger.setLevel(logging.WARNING)
1965
console.setLevel(logging.WARNING)
1966
if debuglevel:
1967
level = getattr(logging, debuglevel.upper())
1968
syslogger.setLevel(level)
1969
console.setLevel(level)
2498
if error.errno != errno.EPERM:
2499
raise
1970
2500
1971
2501
if debug:
1972
2502
# Enable all possible GnuTLS debugging
1983
2513
.gnutls_global_set_log_function(debug_gnutls))
1984
2514
1985
2515
# Redirect stdin so all checkers get /dev/null
1986
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2516
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1987
2517
os.dup2(null, sys.stdin.fileno())
1988
2518
if null > 2:
1989
2519
os.close(null)
1990
else:
1991
# No console logging
1992
logger.removeHandler(console)
1993
2520
1994
2521
# Need to fork before connecting to D-Bus
1995
if not debug:
2522
if not foreground:
1996
2523
# Close all input and output, do double fork, etc.
1997
2524
daemon()
1998
2525
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
1999
2530
global main_loop
2000
2531
# From the Avahi example code
2001
DBusGMainLoop(set_as_default=True )
2532
DBusGMainLoop(set_as_default=True)
2002
2533
main_loop = gobject.MainLoop()
2003
2534
bus = dbus.SystemBus()
2004
2535
# End of Avahi example code
2010
2541
("se.bsnet.fukt.Mandos", bus,
2011
2542
do_not_queue=True))
2012
2543
except dbus.exceptions.NameExistsException as e:
2013
logger.error(unicode(e) + ", disabling D-Bus")
2544
logger.error("Disabling D-Bus:", exc_info=e)
2014
2545
use_dbus = False
2015
2546
server_settings["use_dbus"] = False
2016
2547
tcp_server.use_dbus = False
2017
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2018
service = AvahiService(name = server_settings["servicename"],
2019
servicetype = "_mandos._tcp",
2020
protocol = protocol, bus = bus)
2021
if server_settings["interface"]:
2022
service.interface = (if_nametoindex
2023
(str(server_settings["interface"])))
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"])))
2024
2557
2025
2558
global multiprocessing_manager
2026
2559
multiprocessing_manager = multiprocessing.Manager()
2027
2560
2028
2561
client_class = Client
2029
2562
if use_dbus:
2030
client_class = functools.partial(ClientDBusTransitional,
2031
bus = bus)
2032
def client_config_items(config, section):
2033
special_settings = {
2034
"approved_by_default":
2035
lambda: config.getboolean(section,
2036
"approved_by_default"),
2037
}
2038
for name, value in config.items(section):
2563
client_class = functools.partial(ClientDBus, bus = bus)
2564
2565
client_settings = Client.config_parser(client_config)
2566
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.
2578
if server_settings["restore"]:
2579
try:
2580
with open(stored_state_path, "rb") as stored_state:
2581
clients_data, old_client_settings = (pickle.load
2582
(stored_state))
2583
os.remove(stored_state_path)
2584
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)
2591
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))
2039
2646
try:
2040
yield (name, special_settings[name]())
2041
except KeyError:
2042
yield (name, value)
2043
2044
tcp_server.clients.update(set(
2045
client_class(name = section,
2046
config= dict(client_config_items(
2047
client_config, section)))
2048
for section in client_config.sections()))
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)
2671
2049
2672
if not tcp_server.clients:
2050
2673
logger.warning("No clients defined")
2051
2052
if not debug:
2053
try:
2054
with pidfile:
2055
pid = os.getpid()
2056
pidfile.write(str(pid) + "\n".encode("utf-8"))
2057
del pidfile
2058
except IOError:
2059
logger.error("Could not write to file %r with PID %d",
2060
pidfilename, pid)
2061
except NameError:
2062
# "pidfile" was never created
2063
pass
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
2064
2685
del pidfilename
2065
2066
signal.signal(signal.SIGINT, signal.SIG_IGN)
2067
2686
2068
2687
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2069
2688
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2070
2689
2071
2690
if use_dbus:
2072
class MandosDBusService(dbus.service.Object):
2691
@alternate_dbus_interfaces({"se.recompile.Mandos":
2692
"se.bsnet.fukt.Mandos"})
2693
class MandosDBusService(DBusObjectWithProperties):
2073
2694
"""A D-Bus proxy object"""
2074
2695
def __init__(self):
2075
2696
dbus.service.Object.__init__(self, bus, "/")
2076
2697
_interface = "se.recompile.Mandos"
2077
2698
2699
@dbus_interface_annotations(_interface)
2700
def _foo(self):
2701
return { "org.freedesktop.DBus.Property"
2702
".EmitsChangedSignal":
2703
"false"}
2704
2078
2705
@dbus.service.signal(_interface, signature="o")
2079
2706
def ClientAdded(self, objpath):
2080
2707
"D-Bus signal"
2094
2721
def GetAllClients(self):
2095
2722
"D-Bus method"
2096
2723
return dbus.Array(c.dbus_object_path
2097
for c in tcp_server.clients)
2724
for c in
2725
tcp_server.clients.itervalues())
2098
2726
2099
2727
@dbus.service.method(_interface,
2100
2728
out_signature="a{oa{sv}}")
2102
2730
"D-Bus method"
2103
2731
return dbus.Dictionary(
2104
2732
((c.dbus_object_path, c.GetAll(""))
2105
for c in tcp_server.clients),
2733
for c in tcp_server.clients.itervalues()),
2106
2734
signature="oa{sv}")
2107
2735
2108
2736
@dbus.service.method(_interface, in_signature="o")
2109
2737
def RemoveClient(self, object_path):
2110
2738
"D-Bus method"
2111
for c in tcp_server.clients:
2739
for c in tcp_server.clients.itervalues():
2112
2740
if c.dbus_object_path == object_path:
2113
tcp_server.clients.remove(c)
2741
del tcp_server.clients[c.name]
2114
2742
c.remove_from_connection()
2115
2743
# Don't signal anything except ClientRemoved
2116
2744
c.disable(quiet=True)
2121
2749
2122
2750
del _interface
2123
2751
2124
class MandosDBusServiceTransitional(MandosDBusService):
2125
__metaclass__ = AlternateDBusNamesMetaclass
2126
mandos_dbus_service = MandosDBusServiceTransitional()
2752
mandos_dbus_service = MandosDBusService()
2127
2753
2128
2754
def cleanup():
2129
2755
"Cleanup function; run on exit"
2130
service.cleanup()
2131
2756
if zeroconf:
2757
service.cleanup()
2758
2759
multiprocessing.active_children()
2760
wnull.close()
2761
if not (tcp_server.clients or client_settings):
2762
return
2763
2764
# Store client before exiting. Secrets are encrypted with key
2765
# based on what config file has. If config file is
2766
# 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
2792
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:
2797
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)
2812
raise
2813
2814
# Delete all clients, and settings from config
2132
2815
while tcp_server.clients:
2133
client = tcp_server.clients.pop()
2816
name, client = tcp_server.clients.popitem()
2134
2817
if use_dbus:
2135
2818
client.remove_from_connection()
2136
client.disable_hook = None
2137
2819
# Don't signal anything except ClientRemoved
2138
2820
client.disable(quiet=True)
2139
2821
if use_dbus:
2141
2823
mandos_dbus_service.ClientRemoved(client
2142
2824
.dbus_object_path,
2143
2825
client.name)
2826
client_settings.clear()
2144
2827
2145
2828
atexit.register(cleanup)
2146
2829
2147
for client in tcp_server.clients:
2830
for client in tcp_server.clients.itervalues():
2148
2831
if use_dbus:
2149
2832
# Emit D-Bus signal
2150
2833
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2151
client.enable()
2834
# Need to initiate checking of clients
2835
if client.enabled:
2836
client.init_checker()
2152
2837
2153
2838
tcp_server.enable()
2154
2839
tcp_server.server_activate()
2155
2840
2156
2841
# Find out what port we got
2157
service.port = tcp_server.socket.getsockname()[1]
2842
if zeroconf:
2843
service.port = tcp_server.socket.getsockname()[1]
2158
2844
if use_ipv6:
2159
2845
logger.info("Now listening on address %r, port %d,"
2160
" flowinfo %d, scope_id %d"
2161
% tcp_server.socket.getsockname())
2846
" flowinfo %d, scope_id %d",
2847
*tcp_server.socket.getsockname())
2162
2848
else: # IPv4
2163
logger.info("Now listening on address %r, port %d"
2164
% tcp_server.socket.getsockname())
2849
logger.info("Now listening on address %r, port %d",
2850
*tcp_server.socket.getsockname())
2165
2851
2166
2852
#service.interface = tcp_server.socket.getsockname()[3]
2167
2853
2168
2854
try:
2169
# From the Avahi example code
2170
try:
2171
service.activate()
2172
except dbus.exceptions.DBusException as error:
2173
logger.critical("DBusException: %s", error)
2174
cleanup()
2175
sys.exit(1)
2176
# End of Avahi example code
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
2177
2864
2178
2865
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2179
2866
lambda *args, **kwargs:
2183
2870
logger.debug("Starting main loop")
2184
2871
main_loop.run()
2185
2872
except AvahiError as error:
2186
logger.critical("AvahiError: %s", error)
2873
logger.critical("Avahi Error", exc_info=error)
2187
2874
cleanup()
2188
2875
sys.exit(1)
2189
2876
except KeyboardInterrupt:
2194
2881
# Must run before the D-Bus bus name gets deregistered
2195
2882
cleanup()
2196
2883
2197
2198
2884
if __name__ == '__main__':
2199
2885
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0