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- Committer: Teddy Hogeborn
- Date: 2011-02-27 17:26:35 UTC
- Revision ID: teddy@fukt.bsnet.se-20110227172635-hw1sire7k3vuo1co
Update copyright year to "2011" wherever appropriate.
- files removed:
- debian/source/local-options
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
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12
#
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# Everything else is
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# Copyright © 2008-2012 Teddy Hogeborn
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# Copyright © 2008-2012 Björn Påhlsson
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# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@recompile.se>.
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# Contact the authors at <mandos@fukt.bsnet.se>.
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32
#
33
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34
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from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
from future_builtins import *
38
39
37
import SocketServer as socketserver
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import socket
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import argparse
39
import optparse
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40
import datetime
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41
import errno
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42
import gnutls.crypto
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import functools
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import cPickle as pickle
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64
import multiprocessing
67
import types
68
import binascii
69
import tempfile
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import itertools
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65
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import dbus
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import dbus.service
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72
import ctypes.util
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import xml.dom.minidom
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import inspect
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import GnuPGInterface
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75
83
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try:
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SO_BINDTODEVICE = socket.SO_BINDTODEVICE
88
81
except ImportError:
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82
SO_BINDTODEVICE = None
90
83
91
version = "1.5.4"
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stored_state_file = "clients.pickle"
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logger = logging.getLogger()
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version = "1.2.3"
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#logger = logging.getLogger('mandos')
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logger = logging.Logger('mandos')
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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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91
address = str("/dev/log")))
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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
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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.gnupg = GnuPGInterface.GnuPG()
143
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
144
self.gnupg = GnuPGInterface.GnuPG()
145
self.gnupg.options.meta_interactive = False
146
self.gnupg.options.homedir = self.tempdir
147
self.gnupg.options.extra_args.extend(['--force-mdc',
148
'--quiet',
149
'--no-use-agent'])
150
151
def __enter__(self):
152
return self
153
154
def __exit__ (self, exc_type, exc_value, traceback):
155
self._cleanup()
156
return False
157
158
def __del__(self):
159
self._cleanup()
160
161
def _cleanup(self):
162
if self.tempdir is not None:
163
# Delete contents of tempdir
164
for root, dirs, files in os.walk(self.tempdir,
165
topdown = False):
166
for filename in files:
167
os.remove(os.path.join(root, filename))
168
for dirname in dirs:
169
os.rmdir(os.path.join(root, dirname))
170
# Remove tempdir
171
os.rmdir(self.tempdir)
172
self.tempdir = None
173
174
def password_encode(self, password):
175
# Passphrase can not be empty and can not contain newlines or
176
# NUL bytes. So we prefix it and hex encode it.
177
return b"mandos" + binascii.hexlify(password)
178
179
def encrypt(self, data, password):
180
self.gnupg.passphrase = self.password_encode(password)
181
with open(os.devnull, "w") as devnull:
182
try:
183
proc = self.gnupg.run(['--symmetric'],
184
create_fhs=['stdin', 'stdout'],
185
attach_fhs={'stderr': devnull})
186
with contextlib.closing(proc.handles['stdin']) as f:
187
f.write(data)
188
with contextlib.closing(proc.handles['stdout']) as f:
189
ciphertext = f.read()
190
proc.wait()
191
except IOError as e:
192
raise PGPError(e)
193
self.gnupg.passphrase = None
194
return ciphertext
195
196
def decrypt(self, data, password):
197
self.gnupg.passphrase = self.password_encode(password)
198
with open(os.devnull, "w") as devnull:
199
try:
200
proc = self.gnupg.run(['--decrypt'],
201
create_fhs=['stdin', 'stdout'],
202
attach_fhs={'stderr': devnull})
203
with contextlib.closing(proc.handles['stdin']) as f:
204
f.write(data)
205
with contextlib.closing(proc.handles['stdout']) as f:
206
decrypted_plaintext = f.read()
207
proc.wait()
208
except IOError as e:
209
raise PGPError(e)
210
self.gnupg.passphrase = None
211
return decrypted_plaintext
212
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
213
102
214
103
class AvahiError(Exception):
215
104
def __init__(self, value, *args, **kwargs):
245
134
server: D-Bus Server
246
135
bus: dbus.SystemBus()
247
136
"""
248
249
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
250
138
servicetype = None, port = None, TXT = None,
251
139
domain = "", host = "", max_renames = 32768,
263
151
self.group = None # our entry group
264
152
self.server = None
265
153
self.bus = bus
266
self.entry_group_state_changed_match = None
267
268
154
def rename(self):
269
155
"""Derived from the Avahi example code"""
270
156
if self.rename_count >= self.max_renames:
272
158
" after %i retries, exiting.",
273
159
self.rename_count)
274
160
raise AvahiServiceError("Too many renames")
275
self.name = unicode(self.server
276
.GetAlternativeServiceName(self.name))
161
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
277
162
logger.info("Changing Zeroconf service name to %r ...",
278
163
self.name)
164
syslogger.setFormatter(logging.Formatter
165
('Mandos (%s) [%%(process)d]:'
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' %%(levelname)s: %%(message)s'
167
% self.name))
279
168
self.remove()
280
169
try:
281
170
self.add()
282
except dbus.exceptions.DBusException as error:
283
logger.critical("D-Bus Exception", exc_info=error)
171
except dbus.exceptions.DBusException, error:
172
logger.critical("DBusException: %s", error)
284
173
self.cleanup()
285
174
os._exit(1)
286
175
self.rename_count += 1
287
288
176
def remove(self):
289
177
"""Derived from the Avahi example code"""
290
if self.entry_group_state_changed_match is not None:
291
self.entry_group_state_changed_match.remove()
292
self.entry_group_state_changed_match = None
293
178
if self.group is not None:
294
179
self.group.Reset()
295
296
180
def add(self):
297
181
"""Derived from the Avahi example code"""
298
self.remove()
299
182
if self.group is None:
300
183
self.group = dbus.Interface(
301
184
self.bus.get_object(avahi.DBUS_NAME,
302
185
self.server.EntryGroupNew()),
303
186
avahi.DBUS_INTERFACE_ENTRY_GROUP)
304
self.entry_group_state_changed_match = (
305
self.group.connect_to_signal(
306
'StateChanged', self.entry_group_state_changed))
187
self.group.connect_to_signal('StateChanged',
188
self
189
.entry_group_state_changed)
307
190
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
308
191
self.name, self.type)
309
192
self.group.AddService(
315
198
dbus.UInt16(self.port),
316
199
avahi.string_array_to_txt_array(self.TXT))
317
200
self.group.Commit()
318
319
201
def entry_group_state_changed(self, state, error):
320
202
"""Derived from the Avahi example code"""
321
203
logger.debug("Avahi entry group state change: %i", state)
328
210
elif state == avahi.ENTRY_GROUP_FAILURE:
329
211
logger.critical("Avahi: Error in group state changed %s",
330
212
unicode(error))
331
raise AvahiGroupError("State changed: {0!s}"
332
.format(error))
333
213
raise AvahiGroupError("State changed: %s"
214
% unicode(error))
334
215
def cleanup(self):
335
216
"""Derived from the Avahi example code"""
336
217
if self.group is not None:
337
try:
338
self.group.Free()
339
except (dbus.exceptions.UnknownMethodException,
340
dbus.exceptions.DBusException):
341
pass
218
self.group.Free()
342
219
self.group = None
343
self.remove()
344
345
def server_state_changed(self, state, error=None):
220
def server_state_changed(self, state):
346
221
"""Derived from the Avahi example code"""
347
222
logger.debug("Avahi server state change: %i", state)
348
bad_states = { avahi.SERVER_INVALID:
349
"Zeroconf server invalid",
350
avahi.SERVER_REGISTERING: None,
351
avahi.SERVER_COLLISION:
352
"Zeroconf server name collision",
353
avahi.SERVER_FAILURE:
354
"Zeroconf server failure" }
355
if state in bad_states:
356
if bad_states[state] is not None:
357
if error is None:
358
logger.error(bad_states[state])
359
else:
360
logger.error(bad_states[state] + ": %r", error)
361
self.cleanup()
223
if state == avahi.SERVER_COLLISION:
224
logger.error("Zeroconf server name collision")
225
self.remove()
362
226
elif state == avahi.SERVER_RUNNING:
363
227
self.add()
364
else:
365
if error is None:
366
logger.debug("Unknown state: %r", state)
367
else:
368
logger.debug("Unknown state: %r: %r", state, error)
369
370
228
def activate(self):
371
229
"""Derived from the Avahi example code"""
372
230
if self.server is None:
373
231
self.server = dbus.Interface(
374
232
self.bus.get_object(avahi.DBUS_NAME,
375
avahi.DBUS_PATH_SERVER,
376
follow_name_owner_changes=True),
233
avahi.DBUS_PATH_SERVER),
377
234
avahi.DBUS_INTERFACE_SERVER)
378
235
self.server.connect_to_signal("StateChanged",
379
236
self.server_state_changed)
380
237
self.server_state_changed(self.server.GetState())
381
238
382
239
383
class AvahiServiceToSyslog(AvahiService):
384
def rename(self):
385
"""Add the new name to the syslog messages"""
386
ret = AvahiService.rename(self)
387
syslogger.setFormatter(logging.Formatter
388
('Mandos ({0}) [%(process)d]:'
389
' %(levelname)s: %(message)s'
390
.format(self.name)))
391
return ret
392
393
394
def timedelta_to_milliseconds(td):
395
"Convert a datetime.timedelta() to milliseconds"
396
return ((td.days * 24 * 60 * 60 * 1000)
397
+ (td.seconds * 1000)
398
+ (td.microseconds // 1000))
399
400
401
240
class Client(object):
402
241
"""A representation of a client host served by this server.
403
242
404
243
Attributes:
405
approved: bool(); 'None' if not yet approved/disapproved
244
_approved: bool(); 'None' if not yet approved/disapproved
406
245
approval_delay: datetime.timedelta(); Time to wait for approval
407
246
approval_duration: datetime.timedelta(); Duration of one approval
408
247
checker: subprocess.Popen(); a running checker process used
415
254
instance %(name)s can be used in the command.
416
255
checker_initiator_tag: a gobject event source tag, or None
417
256
created: datetime.datetime(); (UTC) object creation
418
client_structure: Object describing what attributes a client has
419
and is used for storing the client at exit
420
257
current_checker_command: string; current running checker_command
258
disable_hook: If set, called by disable() as disable_hook(self)
421
259
disable_initiator_tag: a gobject event source tag, or None
422
260
enabled: bool()
423
261
fingerprint: string (40 or 32 hexadecimal digits); used to
426
264
interval: datetime.timedelta(); How often to start a new checker
427
265
last_approval_request: datetime.datetime(); (UTC) or None
428
266
last_checked_ok: datetime.datetime(); (UTC) or None
429
last_checker_status: integer between 0 and 255 reflecting exit
430
status of last checker. -1 reflects crashed
431
checker, -2 means no checker completed yet.
432
last_enabled: datetime.datetime(); (UTC) or None
267
last_enabled: datetime.datetime(); (UTC)
433
268
name: string; from the config file, used in log messages and
434
269
D-Bus identifiers
435
270
secret: bytestring; sent verbatim (over TLS) to client
436
271
timeout: datetime.timedelta(); How long from last_checked_ok
437
272
until this client is disabled
438
extended_timeout: extra long timeout when secret has been sent
439
273
runtime_expansions: Allowed attributes for runtime expansion.
440
expires: datetime.datetime(); time (UTC) when a client will be
441
disabled, or None
442
274
"""
443
275
444
276
runtime_expansions = ("approval_delay", "approval_duration",
445
"created", "enabled", "expires",
446
"fingerprint", "host", "interval",
447
"last_approval_request", "last_checked_ok",
277
"created", "enabled", "fingerprint",
278
"host", "interval", "last_checked_ok",
448
279
"last_enabled", "name", "timeout")
449
client_defaults = { "timeout": "5m",
450
"extended_timeout": "15m",
451
"interval": "2m",
452
"checker": "fping -q -- %%(host)s",
453
"host": "",
454
"approval_delay": "0s",
455
"approval_duration": "1s",
456
"approved_by_default": "True",
457
"enabled": "True",
458
}
280
281
@staticmethod
282
def _timedelta_to_milliseconds(td):
283
"Convert a datetime.timedelta() to milliseconds"
284
return ((td.days * 24 * 60 * 60 * 1000)
285
+ (td.seconds * 1000)
286
+ (td.microseconds // 1000))
459
287
460
288
def timeout_milliseconds(self):
461
289
"Return the 'timeout' attribute in milliseconds"
462
return timedelta_to_milliseconds(self.timeout)
463
464
def extended_timeout_milliseconds(self):
465
"Return the 'extended_timeout' attribute in milliseconds"
466
return timedelta_to_milliseconds(self.extended_timeout)
290
return self._timedelta_to_milliseconds(self.timeout)
467
291
468
292
def interval_milliseconds(self):
469
293
"Return the 'interval' attribute in milliseconds"
470
return timedelta_to_milliseconds(self.interval)
471
294
return self._timedelta_to_milliseconds(self.interval)
295
472
296
def approval_delay_milliseconds(self):
473
return timedelta_to_milliseconds(self.approval_delay)
474
475
@staticmethod
476
def config_parser(config):
477
"""Construct a new dict of client settings of this form:
478
{ client_name: {setting_name: value, ...}, ...}
479
with exceptions for any special settings as defined above.
480
NOTE: Must be a pure function. Must return the same result
481
value given the same arguments.
482
"""
483
settings = {}
484
for client_name in config.sections():
485
section = dict(config.items(client_name))
486
client = settings[client_name] = {}
487
488
client["host"] = section["host"]
489
# Reformat values from string types to Python types
490
client["approved_by_default"] = config.getboolean(
491
client_name, "approved_by_default")
492
client["enabled"] = config.getboolean(client_name,
493
"enabled")
494
495
client["fingerprint"] = (section["fingerprint"].upper()
496
.replace(" ", ""))
497
if "secret" in section:
498
client["secret"] = section["secret"].decode("base64")
499
elif "secfile" in section:
500
with open(os.path.expanduser(os.path.expandvars
501
(section["secfile"])),
502
"rb") as secfile:
503
client["secret"] = secfile.read()
504
else:
505
raise TypeError("No secret or secfile for section {0}"
506
.format(section))
507
client["timeout"] = string_to_delta(section["timeout"])
508
client["extended_timeout"] = string_to_delta(
509
section["extended_timeout"])
510
client["interval"] = string_to_delta(section["interval"])
511
client["approval_delay"] = string_to_delta(
512
section["approval_delay"])
513
client["approval_duration"] = string_to_delta(
514
section["approval_duration"])
515
client["checker_command"] = section["checker"]
516
client["last_approval_request"] = None
517
client["last_checked_ok"] = None
518
client["last_checker_status"] = -2
519
520
return settings
521
522
def __init__(self, settings, name = None):
297
return self._timedelta_to_milliseconds(self.approval_delay)
298
299
def __init__(self, name = None, disable_hook=None, config=None):
300
"""Note: the 'checker' key in 'config' sets the
301
'checker_command' attribute and *not* the 'checker'
302
attribute."""
523
303
self.name = name
524
# adding all client settings
525
for setting, value in settings.iteritems():
526
setattr(self, setting, value)
527
528
if self.enabled:
529
if not hasattr(self, "last_enabled"):
530
self.last_enabled = datetime.datetime.utcnow()
531
if not hasattr(self, "expires"):
532
self.expires = (datetime.datetime.utcnow()
533
+ self.timeout)
534
else:
535
self.last_enabled = None
536
self.expires = None
537
304
if config is None:
305
config = {}
538
306
logger.debug("Creating client %r", self.name)
539
307
# Uppercase and remove spaces from fingerprint for later
540
308
# comparison purposes with return value from the fingerprint()
541
309
# function
310
self.fingerprint = (config["fingerprint"].upper()
311
.replace(" ", ""))
542
312
logger.debug(" Fingerprint: %s", self.fingerprint)
543
self.created = settings.get("created",
544
datetime.datetime.utcnow())
545
546
# attributes specific for this server instance
313
if "secret" in config:
314
self.secret = config["secret"].decode("base64")
315
elif "secfile" in config:
316
with open(os.path.expanduser(os.path.expandvars
317
(config["secfile"])),
318
"rb") as secfile:
319
self.secret = secfile.read()
320
else:
321
raise TypeError("No secret or secfile for client %s"
322
% self.name)
323
self.host = config.get("host", "")
324
self.created = datetime.datetime.utcnow()
325
self.enabled = False
326
self.last_approval_request = None
327
self.last_enabled = None
328
self.last_checked_ok = None
329
self.timeout = string_to_delta(config["timeout"])
330
self.interval = string_to_delta(config["interval"])
331
self.disable_hook = disable_hook
547
332
self.checker = None
548
333
self.checker_initiator_tag = None
549
334
self.disable_initiator_tag = None
550
335
self.checker_callback_tag = None
336
self.checker_command = config["checker"]
551
337
self.current_checker_command = None
552
self.approved = None
338
self.last_connect = None
339
self._approved = None
340
self.approved_by_default = config.get("approved_by_default",
341
True)
553
342
self.approvals_pending = 0
554
self.changedstate = (multiprocessing_manager
555
.Condition(multiprocessing_manager
556
.Lock()))
557
self.client_structure = [attr for attr in
558
self.__dict__.iterkeys()
559
if not attr.startswith("_")]
560
self.client_structure.append("client_structure")
561
562
for name, t in inspect.getmembers(type(self),
563
lambda obj:
564
isinstance(obj,
565
property)):
566
if not name.startswith("_"):
567
self.client_structure.append(name)
343
self.approval_delay = string_to_delta(
344
config["approval_delay"])
345
self.approval_duration = string_to_delta(
346
config["approval_duration"])
347
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
568
348
569
# Send notice to process children that client state has changed
570
349
def send_changedstate(self):
571
with self.changedstate:
572
self.changedstate.notify_all()
573
350
self.changedstate.acquire()
351
self.changedstate.notify_all()
352
self.changedstate.release()
353
574
354
def enable(self):
575
355
"""Start this client's checker and timeout hooks"""
576
356
if getattr(self, "enabled", False):
577
357
# Already enabled
578
358
return
579
self.expires = datetime.datetime.utcnow() + self.timeout
580
self.enabled = True
359
self.send_changedstate()
581
360
self.last_enabled = datetime.datetime.utcnow()
582
self.init_checker()
583
self.send_changedstate()
584
585
def disable(self, quiet=True):
586
"""Disable this client."""
587
if not getattr(self, "enabled", False):
588
return False
589
if not quiet:
590
logger.info("Disabling client %s", self.name)
591
if getattr(self, "disable_initiator_tag", None) is not None:
592
gobject.source_remove(self.disable_initiator_tag)
593
self.disable_initiator_tag = None
594
self.expires = None
595
if getattr(self, "checker_initiator_tag", None) is not None:
596
gobject.source_remove(self.checker_initiator_tag)
597
self.checker_initiator_tag = None
598
self.stop_checker()
599
self.enabled = False
600
if not quiet:
601
self.send_changedstate()
602
# Do not run this again if called by a gobject.timeout_add
603
return False
604
605
def __del__(self):
606
self.disable()
607
608
def init_checker(self):
609
361
# Schedule a new checker to be started an 'interval' from now,
610
362
# and every interval from then on.
611
if self.checker_initiator_tag is not None:
612
gobject.source_remove(self.checker_initiator_tag)
613
363
self.checker_initiator_tag = (gobject.timeout_add
614
364
(self.interval_milliseconds(),
615
365
self.start_checker))
616
366
# Schedule a disable() when 'timeout' has passed
617
if self.disable_initiator_tag is not None:
618
gobject.source_remove(self.disable_initiator_tag)
619
367
self.disable_initiator_tag = (gobject.timeout_add
620
368
(self.timeout_milliseconds(),
621
369
self.disable))
370
self.enabled = True
622
371
# Also start a new checker *right now*.
623
372
self.start_checker()
624
373
374
def disable(self, quiet=True):
375
"""Disable this client."""
376
if not getattr(self, "enabled", False):
377
return False
378
if not quiet:
379
self.send_changedstate()
380
if not quiet:
381
logger.info("Disabling client %s", self.name)
382
if getattr(self, "disable_initiator_tag", False):
383
gobject.source_remove(self.disable_initiator_tag)
384
self.disable_initiator_tag = None
385
if getattr(self, "checker_initiator_tag", False):
386
gobject.source_remove(self.checker_initiator_tag)
387
self.checker_initiator_tag = None
388
self.stop_checker()
389
if self.disable_hook:
390
self.disable_hook(self)
391
self.enabled = False
392
# Do not run this again if called by a gobject.timeout_add
393
return False
394
395
def __del__(self):
396
self.disable_hook = None
397
self.disable()
398
625
399
def checker_callback(self, pid, condition, command):
626
400
"""The checker has completed, so take appropriate actions."""
627
401
self.checker_callback_tag = None
628
402
self.checker = None
629
403
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
631
if self.last_checker_status == 0:
404
exitstatus = os.WEXITSTATUS(condition)
405
if exitstatus == 0:
632
406
logger.info("Checker for %(name)s succeeded",
633
407
vars(self))
634
408
self.checked_ok()
636
410
logger.info("Checker for %(name)s failed",
637
411
vars(self))
638
412
else:
639
self.last_checker_status = -1
640
413
logger.warning("Checker for %(name)s crashed?",
641
414
vars(self))
642
415
643
416
def checked_ok(self):
644
"""Assert that the client has been seen, alive and well."""
417
"""Bump up the timeout for this client.
418
419
This should only be called when the client has been seen,
420
alive and well.
421
"""
645
422
self.last_checked_ok = datetime.datetime.utcnow()
646
self.last_checker_status = 0
647
self.bump_timeout()
648
649
def bump_timeout(self, timeout=None):
650
"""Bump up the timeout for this client."""
651
if timeout is None:
652
timeout = self.timeout
653
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = None
656
if getattr(self, "enabled", False):
657
self.disable_initiator_tag = (gobject.timeout_add
658
(timedelta_to_milliseconds
659
(timeout), self.disable))
660
self.expires = datetime.datetime.utcnow() + timeout
423
gobject.source_remove(self.disable_initiator_tag)
424
self.disable_initiator_tag = (gobject.timeout_add
425
(self.timeout_milliseconds(),
426
self.disable))
661
427
662
428
def need_approval(self):
663
429
self.last_approval_request = datetime.datetime.utcnow()
668
434
If a checker already exists, leave it running and do
669
435
nothing."""
670
436
# The reason for not killing a running checker is that if we
671
# did that, and if a checker (for some reason) started running
672
# slowly and taking more than 'interval' time, then the client
673
# would inevitably timeout, since no checker would get a
674
# chance to run to completion. If we instead leave running
437
# did that, then if a checker (for some reason) started
438
# running slowly and taking more than 'interval' time, the
439
# client would inevitably timeout, since no checker would get
440
# a chance to run to completion. If we instead leave running
675
441
# checkers alone, the checker would have to take more time
676
442
# than 'timeout' for the client to be disabled, which is as it
677
443
# should be.
679
445
# If a checker exists, make sure it is not a zombie
680
446
try:
681
447
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
except (AttributeError, OSError) as error:
448
except (AttributeError, OSError), error:
683
449
if (isinstance(error, OSError)
684
450
and error.errno != errno.ECHILD):
685
451
raise error
691
457
self.current_checker_command)
692
458
# Start a new checker if needed
693
459
if self.checker is None:
694
# Escape attributes for the shell
695
escaped_attrs = dict(
696
(attr, re.escape(unicode(getattr(self, attr))))
697
for attr in
698
self.runtime_expansions)
699
460
try:
700
command = self.checker_command % escaped_attrs
701
except TypeError as error:
702
logger.error('Could not format string "%s"',
703
self.checker_command, exc_info=error)
704
return True # Try again later
461
# In case checker_command has exactly one % operator
462
command = self.checker_command % self.host
463
except TypeError:
464
# Escape attributes for the shell
465
escaped_attrs = dict(
466
(attr,
467
re.escape(unicode(str(getattr(self, attr, "")),
468
errors=
469
'replace')))
470
for attr in
471
self.runtime_expansions)
472
473
try:
474
command = self.checker_command % escaped_attrs
475
except TypeError, error:
476
logger.error('Could not format string "%s":'
477
' %s', self.checker_command, error)
478
return True # Try again later
705
479
self.current_checker_command = command
706
480
try:
707
481
logger.info("Starting checker %r for %s",
713
487
self.checker = subprocess.Popen(command,
714
488
close_fds=True,
715
489
shell=True, cwd="/")
716
except OSError as error:
717
logger.error("Failed to start subprocess",
718
exc_info=error)
719
self.checker_callback_tag = (gobject.child_watch_add
720
(self.checker.pid,
721
self.checker_callback,
722
data=command))
723
# The checker may have completed before the gobject
724
# watch was added. Check for this.
725
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
726
if pid:
727
gobject.source_remove(self.checker_callback_tag)
728
self.checker_callback(pid, status, command)
490
self.checker_callback_tag = (gobject.child_watch_add
491
(self.checker.pid,
492
self.checker_callback,
493
data=command))
494
# The checker may have completed before the gobject
495
# watch was added. Check for this.
496
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
497
if pid:
498
gobject.source_remove(self.checker_callback_tag)
499
self.checker_callback(pid, status, command)
500
except OSError, error:
501
logger.error("Failed to start subprocess: %s",
502
error)
729
503
# Re-run this periodically if run by gobject.timeout_add
730
504
return True
731
505
738
512
return
739
513
logger.debug("Stopping checker for %(name)s", vars(self))
740
514
try:
741
self.checker.terminate()
515
os.kill(self.checker.pid, signal.SIGTERM)
742
516
#time.sleep(0.5)
743
517
#if self.checker.poll() is None:
744
# self.checker.kill()
745
except OSError as error:
518
# os.kill(self.checker.pid, signal.SIGKILL)
519
except OSError, error:
746
520
if error.errno != errno.ESRCH: # No such process
747
521
raise
748
522
self.checker = None
749
523
750
751
524
def dbus_service_property(dbus_interface, signature="v",
752
525
access="readwrite", byte_arrays=False):
753
526
"""Decorators for marking methods of a DBusObjectWithProperties to
764
537
# "Set" method, so we fail early here:
765
538
if byte_arrays and signature != "ay":
766
539
raise ValueError("Byte arrays not supported for non-'ay'"
767
" signature {0!r}".format(signature))
540
" signature %r" % signature)
768
541
def decorator(func):
769
542
func._dbus_is_property = True
770
543
func._dbus_interface = dbus_interface
778
551
return decorator
779
552
780
553
781
def dbus_interface_annotations(dbus_interface):
782
"""Decorator for marking functions returning interface annotations
783
784
Usage:
785
786
@dbus_interface_annotations("org.example.Interface")
787
def _foo(self): # Function name does not matter
788
return {"org.freedesktop.DBus.Deprecated": "true",
789
"org.freedesktop.DBus.Property.EmitsChangedSignal":
790
"false"}
791
"""
792
def decorator(func):
793
func._dbus_is_interface = True
794
func._dbus_interface = dbus_interface
795
func._dbus_name = dbus_interface
796
return func
797
return decorator
798
799
800
def dbus_annotations(annotations):
801
"""Decorator to annotate D-Bus methods, signals or properties
802
Usage:
803
804
@dbus_service_property("org.example.Interface", signature="b",
805
access="r")
806
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
807
"org.freedesktop.DBus.Property."
808
"EmitsChangedSignal": "false"})
809
def Property_dbus_property(self):
810
return dbus.Boolean(False)
811
"""
812
def decorator(func):
813
func._dbus_annotations = annotations
814
return func
815
return decorator
816
817
818
554
class DBusPropertyException(dbus.exceptions.DBusException):
819
555
"""A base class for D-Bus property-related exceptions
820
556
"""
836
572
837
573
class DBusObjectWithProperties(dbus.service.Object):
838
574
"""A D-Bus object with properties.
839
575
840
576
Classes inheriting from this can use the dbus_service_property
841
577
decorator to expose methods as D-Bus properties. It exposes the
842
578
standard Get(), Set(), and GetAll() methods on the D-Bus.
843
579
"""
844
580
845
581
@staticmethod
846
def _is_dbus_thing(thing):
847
"""Returns a function testing if an attribute is a D-Bus thing
848
849
If called like _is_dbus_thing("method") it returns a function
850
suitable for use as predicate to inspect.getmembers().
851
"""
852
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
853
False)
582
def _is_dbus_property(obj):
583
return getattr(obj, "_dbus_is_property", False)
854
584
855
def _get_all_dbus_things(self, thing):
585
def _get_all_dbus_properties(self):
856
586
"""Returns a generator of (name, attribute) pairs
857
587
"""
858
return ((getattr(athing.__get__(self), "_dbus_name",
859
name),
860
athing.__get__(self))
861
for cls in self.__class__.__mro__
862
for name, athing in
863
inspect.getmembers(cls,
864
self._is_dbus_thing(thing)))
588
return ((prop._dbus_name, prop)
589
for name, prop in
590
inspect.getmembers(self, self._is_dbus_property))
865
591
866
592
def _get_dbus_property(self, interface_name, property_name):
867
593
"""Returns a bound method if one exists which is a D-Bus
868
594
property with the specified name and interface.
869
595
"""
870
for cls in self.__class__.__mro__:
871
for name, value in (inspect.getmembers
872
(cls,
873
self._is_dbus_thing("property"))):
874
if (value._dbus_name == property_name
875
and value._dbus_interface == interface_name):
876
return value.__get__(self)
877
596
for name in (property_name,
597
property_name + "_dbus_property"):
598
prop = getattr(self, name, None)
599
if (prop is None
600
or not self._is_dbus_property(prop)
601
or prop._dbus_name != property_name
602
or (interface_name and prop._dbus_interface
603
and interface_name != prop._dbus_interface)):
604
continue
605
return prop
878
606
# No such property
879
607
raise DBusPropertyNotFound(self.dbus_object_path + ":"
880
608
+ interface_name + "."
905
633
# signatures other than "ay".
906
634
if prop._dbus_signature != "ay":
907
635
raise ValueError
908
value = dbus.ByteArray(b''.join(chr(byte)
909
for byte in value))
636
value = dbus.ByteArray(''.join(unichr(byte)
637
for byte in value))
910
638
prop(value)
911
639
912
640
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
914
642
def GetAll(self, interface_name):
915
643
"""Standard D-Bus property GetAll() method, see D-Bus
916
644
standard.
917
645
918
646
Note: Will not include properties with access="write".
919
647
"""
920
properties = {}
921
for name, prop in self._get_all_dbus_things("property"):
648
all = {}
649
for name, prop in self._get_all_dbus_properties():
922
650
if (interface_name
923
651
and interface_name != prop._dbus_interface):
924
652
# Interface non-empty but did not match
928
656
continue
929
657
value = prop()
930
658
if not hasattr(value, "variant_level"):
931
properties[name] = value
659
all[name] = value
932
660
continue
933
properties[name] = type(value)(value, variant_level=
934
value.variant_level+1)
935
return dbus.Dictionary(properties, signature="sv")
661
all[name] = type(value)(value, variant_level=
662
value.variant_level+1)
663
return dbus.Dictionary(all, signature="sv")
936
664
937
665
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
938
666
out_signature="s",
939
667
path_keyword='object_path',
940
668
connection_keyword='connection')
941
669
def Introspect(self, object_path, connection):
942
"""Overloading of standard D-Bus method.
943
944
Inserts property tags and interface annotation tags.
670
"""Standard D-Bus method, overloaded to insert property tags.
945
671
"""
946
672
xmlstring = dbus.service.Object.Introspect(self, object_path,
947
673
connection)
954
680
e.setAttribute("access", prop._dbus_access)
955
681
return e
956
682
for if_tag in document.getElementsByTagName("interface"):
957
# Add property tags
958
683
for tag in (make_tag(document, name, prop)
959
684
for name, prop
960
in self._get_all_dbus_things("property")
685
in self._get_all_dbus_properties()
961
686
if prop._dbus_interface
962
687
== if_tag.getAttribute("name")):
963
688
if_tag.appendChild(tag)
964
# Add annotation tags
965
for typ in ("method", "signal", "property"):
966
for tag in if_tag.getElementsByTagName(typ):
967
annots = dict()
968
for name, prop in (self.
969
_get_all_dbus_things(typ)):
970
if (name == tag.getAttribute("name")
971
and prop._dbus_interface
972
== if_tag.getAttribute("name")):
973
annots.update(getattr
974
(prop,
975
"_dbus_annotations",
976
{}))
977
for name, value in annots.iteritems():
978
ann_tag = document.createElement(
979
"annotation")
980
ann_tag.setAttribute("name", name)
981
ann_tag.setAttribute("value", value)
982
tag.appendChild(ann_tag)
983
# Add interface annotation tags
984
for annotation, value in dict(
985
itertools.chain.from_iterable(
986
annotations().iteritems()
987
for name, annotations in
988
self._get_all_dbus_things("interface")
989
if name == if_tag.getAttribute("name")
990
)).iteritems():
991
ann_tag = document.createElement("annotation")
992
ann_tag.setAttribute("name", annotation)
993
ann_tag.setAttribute("value", value)
994
if_tag.appendChild(ann_tag)
995
689
# Add the names to the return values for the
996
690
# "org.freedesktop.DBus.Properties" methods
997
691
if (if_tag.getAttribute("name")
1010
704
xmlstring = document.toxml("utf-8")
1011
705
document.unlink()
1012
706
except (AttributeError, xml.dom.DOMException,
1013
xml.parsers.expat.ExpatError) as error:
707
xml.parsers.expat.ExpatError), error:
1014
708
logger.error("Failed to override Introspection method",
1015
exc_info=error)
709
error)
1016
710
return xmlstring
1017
711
1018
712
1019
def datetime_to_dbus (dt, variant_level=0):
1020
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1021
if dt is None:
1022
return dbus.String("", variant_level = variant_level)
1023
return dbus.String(dt.isoformat(),
1024
variant_level=variant_level)
1025
1026
1027
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1028
"""A class decorator; applied to a subclass of
1029
dbus.service.Object, it will add alternate D-Bus attributes with
1030
interface names according to the "alt_interface_names" mapping.
1031
Usage:
1032
1033
@alternate_dbus_names({"org.example.Interface":
1034
"net.example.AlternateInterface"})
1035
class SampleDBusObject(dbus.service.Object):
1036
@dbus.service.method("org.example.Interface")
1037
def SampleDBusMethod():
1038
pass
1039
1040
The above "SampleDBusMethod" on "SampleDBusObject" will be
1041
reachable via two interfaces: "org.example.Interface" and
1042
"net.example.AlternateInterface", the latter of which will have
1043
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1044
"true", unless "deprecate" is passed with a False value.
1045
1046
This works for methods and signals, and also for D-Bus properties
1047
(from DBusObjectWithProperties) and interfaces (from the
1048
dbus_interface_annotations decorator).
1049
"""
1050
def wrapper(cls):
1051
for orig_interface_name, alt_interface_name in (
1052
alt_interface_names.iteritems()):
1053
attr = {}
1054
interface_names = set()
1055
# Go though all attributes of the class
1056
for attrname, attribute in inspect.getmembers(cls):
1057
# Ignore non-D-Bus attributes, and D-Bus attributes
1058
# with the wrong interface name
1059
if (not hasattr(attribute, "_dbus_interface")
1060
or not attribute._dbus_interface
1061
.startswith(orig_interface_name)):
1062
continue
1063
# Create an alternate D-Bus interface name based on
1064
# the current name
1065
alt_interface = (attribute._dbus_interface
1066
.replace(orig_interface_name,
1067
alt_interface_name))
1068
interface_names.add(alt_interface)
1069
# Is this a D-Bus signal?
1070
if getattr(attribute, "_dbus_is_signal", False):
1071
# Extract the original non-method function by
1072
# black magic
1073
nonmethod_func = (dict(
1074
zip(attribute.func_code.co_freevars,
1075
attribute.__closure__))["func"]
1076
.cell_contents)
1077
# Create a new, but exactly alike, function
1078
# object, and decorate it to be a new D-Bus signal
1079
# with the alternate D-Bus interface name
1080
new_function = (dbus.service.signal
1081
(alt_interface,
1082
attribute._dbus_signature)
1083
(types.FunctionType(
1084
nonmethod_func.func_code,
1085
nonmethod_func.func_globals,
1086
nonmethod_func.func_name,
1087
nonmethod_func.func_defaults,
1088
nonmethod_func.func_closure)))
1089
# Copy annotations, if any
1090
try:
1091
new_function._dbus_annotations = (
1092
dict(attribute._dbus_annotations))
1093
except AttributeError:
1094
pass
1095
# Define a creator of a function to call both the
1096
# original and alternate functions, so both the
1097
# original and alternate signals gets sent when
1098
# the function is called
1099
def fixscope(func1, func2):
1100
"""This function is a scope container to pass
1101
func1 and func2 to the "call_both" function
1102
outside of its arguments"""
1103
def call_both(*args, **kwargs):
1104
"""This function will emit two D-Bus
1105
signals by calling func1 and func2"""
1106
func1(*args, **kwargs)
1107
func2(*args, **kwargs)
1108
return call_both
1109
# Create the "call_both" function and add it to
1110
# the class
1111
attr[attrname] = fixscope(attribute, new_function)
1112
# Is this a D-Bus method?
1113
elif getattr(attribute, "_dbus_is_method", False):
1114
# Create a new, but exactly alike, function
1115
# object. Decorate it to be a new D-Bus method
1116
# with the alternate D-Bus interface name. Add it
1117
# to the class.
1118
attr[attrname] = (dbus.service.method
1119
(alt_interface,
1120
attribute._dbus_in_signature,
1121
attribute._dbus_out_signature)
1122
(types.FunctionType
1123
(attribute.func_code,
1124
attribute.func_globals,
1125
attribute.func_name,
1126
attribute.func_defaults,
1127
attribute.func_closure)))
1128
# Copy annotations, if any
1129
try:
1130
attr[attrname]._dbus_annotations = (
1131
dict(attribute._dbus_annotations))
1132
except AttributeError:
1133
pass
1134
# Is this a D-Bus property?
1135
elif getattr(attribute, "_dbus_is_property", False):
1136
# Create a new, but exactly alike, function
1137
# object, and decorate it to be a new D-Bus
1138
# property with the alternate D-Bus interface
1139
# name. Add it to the class.
1140
attr[attrname] = (dbus_service_property
1141
(alt_interface,
1142
attribute._dbus_signature,
1143
attribute._dbus_access,
1144
attribute
1145
._dbus_get_args_options
1146
["byte_arrays"])
1147
(types.FunctionType
1148
(attribute.func_code,
1149
attribute.func_globals,
1150
attribute.func_name,
1151
attribute.func_defaults,
1152
attribute.func_closure)))
1153
# Copy annotations, if any
1154
try:
1155
attr[attrname]._dbus_annotations = (
1156
dict(attribute._dbus_annotations))
1157
except AttributeError:
1158
pass
1159
# Is this a D-Bus interface?
1160
elif getattr(attribute, "_dbus_is_interface", False):
1161
# Create a new, but exactly alike, function
1162
# object. Decorate it to be a new D-Bus interface
1163
# with the alternate D-Bus interface name. Add it
1164
# to the class.
1165
attr[attrname] = (dbus_interface_annotations
1166
(alt_interface)
1167
(types.FunctionType
1168
(attribute.func_code,
1169
attribute.func_globals,
1170
attribute.func_name,
1171
attribute.func_defaults,
1172
attribute.func_closure)))
1173
if deprecate:
1174
# Deprecate all alternate interfaces
1175
iname="_AlternateDBusNames_interface_annotation{0}"
1176
for interface_name in interface_names:
1177
@dbus_interface_annotations(interface_name)
1178
def func(self):
1179
return { "org.freedesktop.DBus.Deprecated":
1180
"true" }
1181
# Find an unused name
1182
for aname in (iname.format(i)
1183
for i in itertools.count()):
1184
if aname not in attr:
1185
attr[aname] = func
1186
break
1187
if interface_names:
1188
# Replace the class with a new subclass of it with
1189
# methods, signals, etc. as created above.
1190
cls = type(b"{0}Alternate".format(cls.__name__),
1191
(cls,), attr)
1192
return cls
1193
return wrapper
1194
1195
1196
@alternate_dbus_interfaces({"se.recompile.Mandos":
1197
"se.bsnet.fukt.Mandos"})
1198
713
class ClientDBus(Client, DBusObjectWithProperties):
1199
714
"""A Client class using D-Bus
1200
715
1209
724
# dbus.service.Object doesn't use super(), so we can't either.
1210
725
1211
726
def __init__(self, bus = None, *args, **kwargs):
727
self._approvals_pending = 0
1212
728
self.bus = bus
1213
729
Client.__init__(self, *args, **kwargs)
1214
730
# Only now, when this client is initialized, can it show up on
1220
736
("/clients/" + client_object_name))
1221
737
DBusObjectWithProperties.__init__(self, self.bus,
1222
738
self.dbus_object_path)
1223
1224
def notifychangeproperty(transform_func,
1225
dbus_name, type_func=lambda x: x,
1226
variant_level=1):
1227
""" Modify a variable so that it's a property which announces
1228
its changes to DBus.
1229
1230
transform_fun: Function that takes a value and a variant_level
1231
and transforms it to a D-Bus type.
1232
dbus_name: D-Bus name of the variable
1233
type_func: Function that transform the value before sending it
1234
to the D-Bus. Default: no transform
1235
variant_level: D-Bus variant level. Default: 1
1236
"""
1237
attrname = "_{0}".format(dbus_name)
1238
def setter(self, value):
1239
if hasattr(self, "dbus_object_path"):
1240
if (not hasattr(self, attrname) or
1241
type_func(getattr(self, attrname, None))
1242
!= type_func(value)):
1243
dbus_value = transform_func(type_func(value),
1244
variant_level
1245
=variant_level)
1246
self.PropertyChanged(dbus.String(dbus_name),
1247
dbus_value)
1248
setattr(self, attrname, value)
1249
1250
return property(lambda self: getattr(self, attrname), setter)
1251
1252
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1253
approvals_pending = notifychangeproperty(dbus.Boolean,
1254
"ApprovalPending",
1255
type_func = bool)
1256
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1257
last_enabled = notifychangeproperty(datetime_to_dbus,
1258
"LastEnabled")
1259
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1260
type_func = lambda checker:
1261
checker is not None)
1262
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1263
"LastCheckedOK")
1264
last_checker_status = notifychangeproperty(dbus.Int16,
1265
"LastCheckerStatus")
1266
last_approval_request = notifychangeproperty(
1267
datetime_to_dbus, "LastApprovalRequest")
1268
approved_by_default = notifychangeproperty(dbus.Boolean,
1269
"ApprovedByDefault")
1270
approval_delay = notifychangeproperty(dbus.UInt64,
1271
"ApprovalDelay",
1272
type_func =
1273
timedelta_to_milliseconds)
1274
approval_duration = notifychangeproperty(
1275
dbus.UInt64, "ApprovalDuration",
1276
type_func = timedelta_to_milliseconds)
1277
host = notifychangeproperty(dbus.String, "Host")
1278
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1279
type_func =
1280
timedelta_to_milliseconds)
1281
extended_timeout = notifychangeproperty(
1282
dbus.UInt64, "ExtendedTimeout",
1283
type_func = timedelta_to_milliseconds)
1284
interval = notifychangeproperty(dbus.UInt64,
1285
"Interval",
1286
type_func =
1287
timedelta_to_milliseconds)
1288
checker_command = notifychangeproperty(dbus.String, "Checker")
1289
1290
del notifychangeproperty
739
740
def _get_approvals_pending(self):
741
return self._approvals_pending
742
def _set_approvals_pending(self, value):
743
old_value = self._approvals_pending
744
self._approvals_pending = value
745
bval = bool(value)
746
if (hasattr(self, "dbus_object_path")
747
and bval is not bool(old_value)):
748
dbus_bool = dbus.Boolean(bval, variant_level=1)
749
self.PropertyChanged(dbus.String("ApprovalPending"),
750
dbus_bool)
751
752
approvals_pending = property(_get_approvals_pending,
753
_set_approvals_pending)
754
del _get_approvals_pending, _set_approvals_pending
755
756
@staticmethod
757
def _datetime_to_dbus(dt, variant_level=0):
758
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
return dbus.String(dt.isoformat(),
760
variant_level=variant_level)
761
762
def enable(self):
763
oldstate = getattr(self, "enabled", False)
764
r = Client.enable(self)
765
if oldstate != self.enabled:
766
# Emit D-Bus signals
767
self.PropertyChanged(dbus.String("Enabled"),
768
dbus.Boolean(True, variant_level=1))
769
self.PropertyChanged(
770
dbus.String("LastEnabled"),
771
self._datetime_to_dbus(self.last_enabled,
772
variant_level=1))
773
return r
774
775
def disable(self, quiet = False):
776
oldstate = getattr(self, "enabled", False)
777
r = Client.disable(self, quiet=quiet)
778
if not quiet and oldstate != self.enabled:
779
# Emit D-Bus signal
780
self.PropertyChanged(dbus.String("Enabled"),
781
dbus.Boolean(False, variant_level=1))
782
return r
1291
783
1292
784
def __del__(self, *args, **kwargs):
1293
785
try:
1302
794
*args, **kwargs):
1303
795
self.checker_callback_tag = None
1304
796
self.checker = None
797
# Emit D-Bus signal
798
self.PropertyChanged(dbus.String("CheckerRunning"),
799
dbus.Boolean(False, variant_level=1))
1305
800
if os.WIFEXITED(condition):
1306
801
exitstatus = os.WEXITSTATUS(condition)
1307
802
# Emit D-Bus signal
1317
812
return Client.checker_callback(self, pid, condition, command,
1318
813
*args, **kwargs)
1319
814
815
def checked_ok(self, *args, **kwargs):
816
r = Client.checked_ok(self, *args, **kwargs)
817
# Emit D-Bus signal
818
self.PropertyChanged(
819
dbus.String("LastCheckedOK"),
820
(self._datetime_to_dbus(self.last_checked_ok,
821
variant_level=1)))
822
return r
823
824
def need_approval(self, *args, **kwargs):
825
r = Client.need_approval(self, *args, **kwargs)
826
# Emit D-Bus signal
827
self.PropertyChanged(
828
dbus.String("LastApprovalRequest"),
829
(self._datetime_to_dbus(self.last_approval_request,
830
variant_level=1)))
831
return r
832
1320
833
def start_checker(self, *args, **kwargs):
1321
834
old_checker = self.checker
1322
835
if self.checker is not None:
1329
842
and old_checker_pid != self.checker.pid):
1330
843
# Emit D-Bus signal
1331
844
self.CheckerStarted(self.current_checker_command)
845
self.PropertyChanged(
846
dbus.String("CheckerRunning"),
847
dbus.Boolean(True, variant_level=1))
1332
848
return r
1333
849
850
def stop_checker(self, *args, **kwargs):
851
old_checker = getattr(self, "checker", None)
852
r = Client.stop_checker(self, *args, **kwargs)
853
if (old_checker is not None
854
and getattr(self, "checker", None) is None):
855
self.PropertyChanged(dbus.String("CheckerRunning"),
856
dbus.Boolean(False, variant_level=1))
857
return r
858
1334
859
def _reset_approved(self):
1335
self.approved = None
860
self._approved = None
1336
861
return False
1337
862
1338
863
def approve(self, value=True):
1339
self.approved = value
1340
gobject.timeout_add(timedelta_to_milliseconds
864
self.send_changedstate()
865
self._approved = value
866
gobject.timeout_add(self._timedelta_to_milliseconds
1341
867
(self.approval_duration),
1342
868
self._reset_approved)
1343
self.send_changedstate()
869
1344
870
1345
871
## D-Bus methods, signals & properties
1346
_interface = "se.recompile.Mandos.Client"
1347
1348
## Interfaces
1349
1350
@dbus_interface_annotations(_interface)
1351
def _foo(self):
1352
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1353
"false"}
872
_interface = "se.bsnet.fukt.Mandos.Client"
1354
873
1355
874
## Signals
1356
875
1403
922
# CheckedOK - method
1404
923
@dbus.service.method(_interface)
1405
924
def CheckedOK(self):
1406
self.checked_ok()
925
return self.checked_ok()
1407
926
1408
927
# Enable - method
1409
928
@dbus.service.method(_interface)
1442
961
if value is None: # get
1443
962
return dbus.Boolean(self.approved_by_default)
1444
963
self.approved_by_default = bool(value)
964
# Emit D-Bus signal
965
self.PropertyChanged(dbus.String("ApprovedByDefault"),
966
dbus.Boolean(value, variant_level=1))
1445
967
1446
968
# ApprovalDelay - property
1447
969
@dbus_service_property(_interface, signature="t",
1450
972
if value is None: # get
1451
973
return dbus.UInt64(self.approval_delay_milliseconds())
1452
974
self.approval_delay = datetime.timedelta(0, 0, 0, value)
975
# Emit D-Bus signal
976
self.PropertyChanged(dbus.String("ApprovalDelay"),
977
dbus.UInt64(value, variant_level=1))
1453
978
1454
979
# ApprovalDuration - property
1455
980
@dbus_service_property(_interface, signature="t",
1456
981
access="readwrite")
1457
982
def ApprovalDuration_dbus_property(self, value=None):
1458
983
if value is None: # get
1459
return dbus.UInt64(timedelta_to_milliseconds(
984
return dbus.UInt64(self._timedelta_to_milliseconds(
1460
985
self.approval_duration))
1461
986
self.approval_duration = datetime.timedelta(0, 0, 0, value)
987
# Emit D-Bus signal
988
self.PropertyChanged(dbus.String("ApprovalDuration"),
989
dbus.UInt64(value, variant_level=1))
1462
990
1463
991
# Name - property
1464
992
@dbus_service_property(_interface, signature="s", access="read")
1476
1004
def Host_dbus_property(self, value=None):
1477
1005
if value is None: # get
1478
1006
return dbus.String(self.host)
1479
self.host = unicode(value)
1007
self.host = value
1008
# Emit D-Bus signal
1009
self.PropertyChanged(dbus.String("Host"),
1010
dbus.String(value, variant_level=1))
1480
1011
1481
1012
# Created - property
1482
1013
@dbus_service_property(_interface, signature="s", access="read")
1483
1014
def Created_dbus_property(self):
1484
return datetime_to_dbus(self.created)
1015
return dbus.String(self._datetime_to_dbus(self.created))
1485
1016
1486
1017
# LastEnabled - property
1487
1018
@dbus_service_property(_interface, signature="s", access="read")
1488
1019
def LastEnabled_dbus_property(self):
1489
return datetime_to_dbus(self.last_enabled)
1020
if self.last_enabled is None:
1021
return dbus.String("")
1022
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1490
1023
1491
1024
# Enabled - property
1492
1025
@dbus_service_property(_interface, signature="b",
1506
1039
if value is not None:
1507
1040
self.checked_ok()
1508
1041
return
1509
return datetime_to_dbus(self.last_checked_ok)
1510
1511
# LastCheckerStatus - property
1512
@dbus_service_property(_interface, signature="n",
1513
access="read")
1514
def LastCheckerStatus_dbus_property(self):
1515
return dbus.Int16(self.last_checker_status)
1516
1517
# Expires - property
1518
@dbus_service_property(_interface, signature="s", access="read")
1519
def Expires_dbus_property(self):
1520
return datetime_to_dbus(self.expires)
1042
if self.last_checked_ok is None:
1043
return dbus.String("")
1044
return dbus.String(self._datetime_to_dbus(self
1045
.last_checked_ok))
1521
1046
1522
1047
# LastApprovalRequest - property
1523
1048
@dbus_service_property(_interface, signature="s", access="read")
1524
1049
def LastApprovalRequest_dbus_property(self):
1525
return datetime_to_dbus(self.last_approval_request)
1050
if self.last_approval_request is None:
1051
return dbus.String("")
1052
return dbus.String(self.
1053
_datetime_to_dbus(self
1054
.last_approval_request))
1526
1055
1527
1056
# Timeout - property
1528
1057
@dbus_service_property(_interface, signature="t",
1530
1059
def Timeout_dbus_property(self, value=None):
1531
1060
if value is None: # get
1532
1061
return dbus.UInt64(self.timeout_milliseconds())
1533
old_timeout = self.timeout
1534
1062
self.timeout = datetime.timedelta(0, 0, 0, value)
1535
# Reschedule disabling
1536
if self.enabled:
1537
now = datetime.datetime.utcnow()
1538
self.expires += self.timeout - old_timeout
1539
if self.expires <= now:
1540
# The timeout has passed
1541
self.disable()
1542
else:
1543
if (getattr(self, "disable_initiator_tag", None)
1544
is None):
1545
return
1546
gobject.source_remove(self.disable_initiator_tag)
1547
self.disable_initiator_tag = (
1548
gobject.timeout_add(
1549
timedelta_to_milliseconds(self.expires - now),
1550
self.disable))
1551
1552
# ExtendedTimeout - property
1553
@dbus_service_property(_interface, signature="t",
1554
access="readwrite")
1555
def ExtendedTimeout_dbus_property(self, value=None):
1556
if value is None: # get
1557
return dbus.UInt64(self.extended_timeout_milliseconds())
1558
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1063
# Emit D-Bus signal
1064
self.PropertyChanged(dbus.String("Timeout"),
1065
dbus.UInt64(value, variant_level=1))
1066
if getattr(self, "disable_initiator_tag", None) is None:
1067
return
1068
# Reschedule timeout
1069
gobject.source_remove(self.disable_initiator_tag)
1070
self.disable_initiator_tag = None
1071
time_to_die = (self.
1072
_timedelta_to_milliseconds((self
1073
.last_checked_ok
1074
+ self.timeout)
1075
- datetime.datetime
1076
.utcnow()))
1077
if time_to_die <= 0:
1078
# The timeout has passed
1079
self.disable()
1080
else:
1081
self.disable_initiator_tag = (gobject.timeout_add
1082
(time_to_die, self.disable))
1559
1083
1560
1084
# Interval - property
1561
1085
@dbus_service_property(_interface, signature="t",
1564
1088
if value is None: # get
1565
1089
return dbus.UInt64(self.interval_milliseconds())
1566
1090
self.interval = datetime.timedelta(0, 0, 0, value)
1091
# Emit D-Bus signal
1092
self.PropertyChanged(dbus.String("Interval"),
1093
dbus.UInt64(value, variant_level=1))
1567
1094
if getattr(self, "checker_initiator_tag", None) is None:
1568
1095
return
1569
if self.enabled:
1570
# Reschedule checker run
1571
gobject.source_remove(self.checker_initiator_tag)
1572
self.checker_initiator_tag = (gobject.timeout_add
1573
(value, self.start_checker))
1574
self.start_checker() # Start one now, too
1575
1096
# Reschedule checker run
1097
gobject.source_remove(self.checker_initiator_tag)
1098
self.checker_initiator_tag = (gobject.timeout_add
1099
(value, self.start_checker))
1100
self.start_checker() # Start one now, too
1101
1576
1102
# Checker - property
1577
1103
@dbus_service_property(_interface, signature="s",
1578
1104
access="readwrite")
1579
1105
def Checker_dbus_property(self, value=None):
1580
1106
if value is None: # get
1581
1107
return dbus.String(self.checker_command)
1582
self.checker_command = unicode(value)
1108
self.checker_command = value
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Checker"),
1111
dbus.String(self.checker_command,
1112
variant_level=1))
1583
1113
1584
1114
# CheckerRunning - property
1585
1115
@dbus_service_property(_interface, signature="b",
1612
1142
self._pipe.send(('init', fpr, address))
1613
1143
if not self._pipe.recv():
1614
1144
raise KeyError()
1615
1145
1616
1146
def __getattribute__(self, name):
1617
if name == '_pipe':
1147
if(name == '_pipe'):
1618
1148
return super(ProxyClient, self).__getattribute__(name)
1619
1149
self._pipe.send(('getattr', name))
1620
1150
data = self._pipe.recv()
1625
1155
self._pipe.send(('funcall', name, args, kwargs))
1626
1156
return self._pipe.recv()[1]
1627
1157
return func
1628
1158
1629
1159
def __setattr__(self, name, value):
1630
if name == '_pipe':
1160
if(name == '_pipe'):
1631
1161
return super(ProxyClient, self).__setattr__(name, value)
1632
1162
self._pipe.send(('setattr', name, value))
1633
1163
1644
1174
unicode(self.client_address))
1645
1175
logger.debug("Pipe FD: %d",
1646
1176
self.server.child_pipe.fileno())
1647
1177
1648
1178
session = (gnutls.connection
1649
1179
.ClientSession(self.request,
1650
1180
gnutls.connection
1651
1181
.X509Credentials()))
1652
1182
1653
1183
# Note: gnutls.connection.X509Credentials is really a
1654
1184
# generic GnuTLS certificate credentials object so long as
1655
1185
# no X.509 keys are added to it. Therefore, we can use it
1656
1186
# here despite using OpenPGP certificates.
1657
1187
1658
1188
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1659
1189
# "+AES-256-CBC", "+SHA1",
1660
1190
# "+COMP-NULL", "+CTYPE-OPENPGP",
1666
1196
(gnutls.library.functions
1667
1197
.gnutls_priority_set_direct(session._c_object,
1668
1198
priority, None))
1669
1199
1670
1200
# Start communication using the Mandos protocol
1671
1201
# Get protocol number
1672
1202
line = self.request.makefile().readline()
1674
1204
try:
1675
1205
if int(line.strip().split()[0]) > 1:
1676
1206
raise RuntimeError
1677
except (ValueError, IndexError, RuntimeError) as error:
1207
except (ValueError, IndexError, RuntimeError), error:
1678
1208
logger.error("Unknown protocol version: %s", error)
1679
1209
return
1680
1210
1681
1211
# Start GnuTLS connection
1682
1212
try:
1683
1213
session.handshake()
1684
except gnutls.errors.GNUTLSError as error:
1214
except gnutls.errors.GNUTLSError, error:
1685
1215
logger.warning("Handshake failed: %s", error)
1686
1216
# Do not run session.bye() here: the session is not
1687
1217
# established. Just abandon the request.
1688
1218
return
1689
1219
logger.debug("Handshake succeeded")
1690
1220
1691
1221
approval_required = False
1692
1222
try:
1693
1223
try:
1694
1224
fpr = self.fingerprint(self.peer_certificate
1695
1225
(session))
1696
except (TypeError,
1697
gnutls.errors.GNUTLSError) as error:
1226
except (TypeError, gnutls.errors.GNUTLSError), error:
1698
1227
logger.warning("Bad certificate: %s", error)
1699
1228
return
1700
1229
logger.debug("Fingerprint: %s", fpr)
1701
1230
1702
1231
try:
1703
1232
client = ProxyClient(child_pipe, fpr,
1704
1233
self.client_address)
1712
1241
1713
1242
while True:
1714
1243
if not client.enabled:
1715
logger.info("Client %s is disabled",
1244
logger.warning("Client %s is disabled",
1716
1245
client.name)
1717
1246
if self.server.use_dbus:
1718
1247
# Emit D-Bus signal
1719
client.Rejected("Disabled")
1248
client.Rejected("Disabled")
1720
1249
return
1721
1250
1722
if client.approved or not client.approval_delay:
1251
if client._approved or not client.approval_delay:
1723
1252
#We are approved or approval is disabled
1724
1253
break
1725
elif client.approved is None:
1254
elif client._approved is None:
1726
1255
logger.info("Client %s needs approval",
1727
1256
client.name)
1728
1257
if self.server.use_dbus:
1739
1268
return
1740
1269
1741
1270
#wait until timeout or approved
1271
#x = float(client._timedelta_to_milliseconds(delay))
1742
1272
time = datetime.datetime.now()
1743
1273
client.changedstate.acquire()
1744
client.changedstate.wait(
1745
float(timedelta_to_milliseconds(delay)
1746
/ 1000))
1274
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1747
1275
client.changedstate.release()
1748
1276
time2 = datetime.datetime.now()
1749
1277
if (time2 - time) >= delay:
1764
1292
while sent_size < len(client.secret):
1765
1293
try:
1766
1294
sent = session.send(client.secret[sent_size:])
1767
except gnutls.errors.GNUTLSError as error:
1768
logger.warning("gnutls send failed",
1769
exc_info=error)
1295
except (gnutls.errors.GNUTLSError), error:
1296
logger.warning("gnutls send failed")
1770
1297
return
1771
1298
logger.debug("Sent: %d, remaining: %d",
1772
1299
sent, len(client.secret)
1773
1300
- (sent_size + sent))
1774
1301
sent_size += sent
1775
1302
1776
1303
logger.info("Sending secret to %s", client.name)
1777
# bump the timeout using extended_timeout
1778
client.bump_timeout(client.extended_timeout)
1304
# bump the timeout as if seen
1305
client.checked_ok()
1779
1306
if self.server.use_dbus:
1780
1307
# Emit D-Bus signal
1781
1308
client.GotSecret()
1785
1312
client.approvals_pending -= 1
1786
1313
try:
1787
1314
session.bye()
1788
except gnutls.errors.GNUTLSError as error:
1789
logger.warning("GnuTLS bye failed",
1790
exc_info=error)
1315
except (gnutls.errors.GNUTLSError), error:
1316
logger.warning("GnuTLS bye failed")
1791
1317
1792
1318
@staticmethod
1793
1319
def peer_certificate(session):
1849
1375
# Convert the buffer to a Python bytestring
1850
1376
fpr = ctypes.string_at(buf, buf_len.value)
1851
1377
# Convert the bytestring to hexadecimal notation
1852
hex_fpr = binascii.hexlify(fpr).upper()
1378
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1853
1379
return hex_fpr
1854
1380
1855
1381
1858
1384
def sub_process_main(self, request, address):
1859
1385
try:
1860
1386
self.finish_request(request, address)
1861
except Exception:
1387
except:
1862
1388
self.handle_error(request, address)
1863
1389
self.close_request(request)
1864
1390
1865
1391
def process_request(self, request, address):
1866
1392
"""Start a new process to process the request."""
1867
proc = multiprocessing.Process(target = self.sub_process_main,
1868
args = (request, address))
1869
proc.start()
1870
return proc
1871
1393
multiprocessing.Process(target = self.sub_process_main,
1394
args = (request, address)).start()
1872
1395
1873
1396
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1874
1397
""" adds a pipe to the MixIn """
1878
1401
This function creates a new pipe in self.pipe
1879
1402
"""
1880
1403
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1881
1882
proc = MultiprocessingMixIn.process_request(self, request,
1883
client_address)
1404
1405
super(MultiprocessingMixInWithPipe,
1406
self).process_request(request, client_address)
1884
1407
self.child_pipe.close()
1885
self.add_pipe(parent_pipe, proc)
1886
1887
def add_pipe(self, parent_pipe, proc):
1408
self.add_pipe(parent_pipe)
1409
1410
def add_pipe(self, parent_pipe):
1888
1411
"""Dummy function; override as necessary"""
1889
1412
raise NotImplementedError
1890
1413
1891
1892
1414
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1893
1415
socketserver.TCPServer, object):
1894
1416
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1920
1442
SO_BINDTODEVICE,
1921
1443
str(self.interface
1922
1444
+ '\0'))
1923
except socket.error as error:
1924
if error.errno == errno.EPERM:
1445
except socket.error, error:
1446
if error[0] == errno.EPERM:
1925
1447
logger.error("No permission to"
1926
1448
" bind to interface %s",
1927
1449
self.interface)
1928
elif error.errno == errno.ENOPROTOOPT:
1450
elif error[0] == errno.ENOPROTOOPT:
1929
1451
logger.error("SO_BINDTODEVICE not available;"
1930
1452
" cannot bind to interface %s",
1931
1453
self.interface)
1932
elif error.errno == errno.ENODEV:
1933
logger.error("Interface %s does not"
1934
" exist, cannot bind",
1935
self.interface)
1936
1454
else:
1937
1455
raise
1938
1456
# Only bind(2) the socket if we really need to.
1972
1490
self.enabled = False
1973
1491
self.clients = clients
1974
1492
if self.clients is None:
1975
self.clients = {}
1493
self.clients = set()
1976
1494
self.use_dbus = use_dbus
1977
1495
self.gnutls_priority = gnutls_priority
1978
1496
IPv6_TCPServer.__init__(self, server_address,
1982
1500
def server_activate(self):
1983
1501
if self.enabled:
1984
1502
return socketserver.TCPServer.server_activate(self)
1985
1986
1503
def enable(self):
1987
1504
self.enabled = True
1988
1989
def add_pipe(self, parent_pipe, proc):
1505
def add_pipe(self, parent_pipe):
1990
1506
# Call "handle_ipc" for both data and EOF events
1991
1507
gobject.io_add_watch(parent_pipe.fileno(),
1992
1508
gobject.IO_IN | gobject.IO_HUP,
1993
1509
functools.partial(self.handle_ipc,
1994
parent_pipe =
1995
parent_pipe,
1996
proc = proc))
1997
1510
parent_pipe = parent_pipe))
1511
1998
1512
def handle_ipc(self, source, condition, parent_pipe=None,
1999
proc = None, client_object=None):
2000
# error, or the other end of multiprocessing.Pipe has closed
2001
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2002
# Wait for other process to exit
2003
proc.join()
1513
client_object=None):
1514
condition_names = {
1515
gobject.IO_IN: "IN", # There is data to read.
1516
gobject.IO_OUT: "OUT", # Data can be written (without
1517
# blocking).
1518
gobject.IO_PRI: "PRI", # There is urgent data to read.
1519
gobject.IO_ERR: "ERR", # Error condition.
1520
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1521
# broken, usually for pipes and
1522
# sockets).
1523
}
1524
conditions_string = ' | '.join(name
1525
for cond, name in
1526
condition_names.iteritems()
1527
if cond & condition)
1528
# error or the other end of multiprocessing.Pipe has closed
1529
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2004
1530
return False
2005
1531
2006
1532
# Read a request from the child
2011
1537
fpr = request[1]
2012
1538
address = request[2]
2013
1539
2014
for c in self.clients.itervalues():
1540
for c in self.clients:
2015
1541
if c.fingerprint == fpr:
2016
1542
client = c
2017
1543
break
2018
1544
else:
2019
logger.info("Client not found for fingerprint: %s, ad"
2020
"dress: %s", fpr, address)
1545
logger.warning("Client not found for fingerprint: %s, ad"
1546
"dress: %s", fpr, address)
2021
1547
if self.use_dbus:
2022
1548
# Emit D-Bus signal
2023
mandos_dbus_service.ClientNotFound(fpr,
2024
address[0])
1549
mandos_dbus_service.ClientNotFound(fpr, address[0])
2025
1550
parent_pipe.send(False)
2026
1551
return False
2027
1552
2028
1553
gobject.io_add_watch(parent_pipe.fileno(),
2029
1554
gobject.IO_IN | gobject.IO_HUP,
2030
1555
functools.partial(self.handle_ipc,
2031
parent_pipe =
2032
parent_pipe,
2033
proc = proc,
2034
client_object =
2035
client))
1556
parent_pipe = parent_pipe,
1557
client_object = client))
2036
1558
parent_pipe.send(True)
2037
# remove the old hook in favor of the new above hook on
2038
# same fileno
1559
# remove the old hook in favor of the new above hook on same fileno
2039
1560
return False
2040
1561
if command == 'funcall':
2041
1562
funcname = request[1]
2042
1563
args = request[2]
2043
1564
kwargs = request[3]
2044
1565
2045
parent_pipe.send(('data', getattr(client_object,
2046
funcname)(*args,
2047
**kwargs)))
2048
1566
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1567
2049
1568
if command == 'getattr':
2050
1569
attrname = request[1]
2051
1570
if callable(client_object.__getattribute__(attrname)):
2052
1571
parent_pipe.send(('function',))
2053
1572
else:
2054
parent_pipe.send(('data', client_object
2055
.__getattribute__(attrname)))
1573
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2056
1574
2057
1575
if command == 'setattr':
2058
1576
attrname = request[1]
2059
1577
value = request[2]
2060
1578
setattr(client_object, attrname, value)
2061
1579
2062
1580
return True
2063
1581
2064
1582
2094
1612
elif suffix == "w":
2095
1613
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2096
1614
else:
2097
raise ValueError("Unknown suffix {0!r}"
2098
.format(suffix))
2099
except (ValueError, IndexError) as e:
1615
raise ValueError("Unknown suffix %r" % suffix)
1616
except (ValueError, IndexError), e:
2100
1617
raise ValueError(*(e.args))
2101
1618
timevalue += delta
2102
1619
return timevalue
2103
1620
2104
1621
1622
def if_nametoindex(interface):
1623
"""Call the C function if_nametoindex(), or equivalent
1624
1625
Note: This function cannot accept a unicode string."""
1626
global if_nametoindex
1627
try:
1628
if_nametoindex = (ctypes.cdll.LoadLibrary
1629
(ctypes.util.find_library("c"))
1630
.if_nametoindex)
1631
except (OSError, AttributeError):
1632
logger.warning("Doing if_nametoindex the hard way")
1633
def if_nametoindex(interface):
1634
"Get an interface index the hard way, i.e. using fcntl()"
1635
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1636
with contextlib.closing(socket.socket()) as s:
1637
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
struct.pack(str("16s16x"),
1639
interface))
1640
interface_index = struct.unpack(str("I"),
1641
ifreq[16:20])[0]
1642
return interface_index
1643
return if_nametoindex(interface)
1644
1645
2105
1646
def daemon(nochdir = False, noclose = False):
2106
1647
"""See daemon(3). Standard BSD Unix function.
2107
1648
2115
1656
sys.exit()
2116
1657
if not noclose:
2117
1658
# Close all standard open file descriptors
2118
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1659
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2119
1660
if not stat.S_ISCHR(os.fstat(null).st_mode):
2120
1661
raise OSError(errno.ENODEV,
2121
"{0} not a character device"
2122
.format(os.devnull))
1662
"%s not a character device"
1663
% os.path.devnull)
2123
1664
os.dup2(null, sys.stdin.fileno())
2124
1665
os.dup2(null, sys.stdout.fileno())
2125
1666
os.dup2(null, sys.stderr.fileno())
2132
1673
##################################################################
2133
1674
# Parsing of options, both command line and config file
2134
1675
2135
parser = argparse.ArgumentParser()
2136
parser.add_argument("-v", "--version", action="version",
2137
version = "%(prog)s {0}".format(version),
2138
help="show version number and exit")
2139
parser.add_argument("-i", "--interface", metavar="IF",
2140
help="Bind to interface IF")
2141
parser.add_argument("-a", "--address",
2142
help="Address to listen for requests on")
2143
parser.add_argument("-p", "--port", type=int,
2144
help="Port number to receive requests on")
2145
parser.add_argument("--check", action="store_true",
2146
help="Run self-test")
2147
parser.add_argument("--debug", action="store_true",
2148
help="Debug mode; run in foreground and log"
2149
" to terminal")
2150
parser.add_argument("--debuglevel", metavar="LEVEL",
2151
help="Debug level for stdout output")
2152
parser.add_argument("--priority", help="GnuTLS"
2153
" priority string (see GnuTLS documentation)")
2154
parser.add_argument("--servicename",
2155
metavar="NAME", help="Zeroconf service name")
2156
parser.add_argument("--configdir",
2157
default="/etc/mandos", metavar="DIR",
2158
help="Directory to search for configuration"
2159
" files")
2160
parser.add_argument("--no-dbus", action="store_false",
2161
dest="use_dbus", help="Do not provide D-Bus"
2162
" system bus interface")
2163
parser.add_argument("--no-ipv6", action="store_false",
2164
dest="use_ipv6", help="Do not use IPv6")
2165
parser.add_argument("--no-restore", action="store_false",
2166
dest="restore", help="Do not restore stored"
2167
" state")
2168
parser.add_argument("--statedir", metavar="DIR",
2169
help="Directory to save/restore state in")
2170
2171
options = parser.parse_args()
1676
parser = optparse.OptionParser(version = "%%prog %s" % version)
1677
parser.add_option("-i", "--interface", type="string",
1678
metavar="IF", help="Bind to interface IF")
1679
parser.add_option("-a", "--address", type="string",
1680
help="Address to listen for requests on")
1681
parser.add_option("-p", "--port", type="int",
1682
help="Port number to receive requests on")
1683
parser.add_option("--check", action="store_true",
1684
help="Run self-test")
1685
parser.add_option("--debug", action="store_true",
1686
help="Debug mode; run in foreground and log to"
1687
" terminal")
1688
parser.add_option("--debuglevel", type="string", metavar="LEVEL",
1689
help="Debug level for stdout output")
1690
parser.add_option("--priority", type="string", help="GnuTLS"
1691
" priority string (see GnuTLS documentation)")
1692
parser.add_option("--servicename", type="string",
1693
metavar="NAME", help="Zeroconf service name")
1694
parser.add_option("--configdir", type="string",
1695
default="/etc/mandos", metavar="DIR",
1696
help="Directory to search for configuration"
1697
" files")
1698
parser.add_option("--no-dbus", action="store_false",
1699
dest="use_dbus", help="Do not provide D-Bus"
1700
" system bus interface")
1701
parser.add_option("--no-ipv6", action="store_false",
1702
dest="use_ipv6", help="Do not use IPv6")
1703
options = parser.parse_args()[0]
2172
1704
2173
1705
if options.check:
2174
1706
import doctest
2186
1718
"use_dbus": "True",
2187
1719
"use_ipv6": "True",
2188
1720
"debuglevel": "",
2189
"restore": "True",
2190
"statedir": "/var/lib/mandos"
2191
1721
}
2192
1722
2193
1723
# Parse config file for server-global settings
2210
1740
# options, if set.
2211
1741
for option in ("interface", "address", "port", "debug",
2212
1742
"priority", "servicename", "configdir",
2213
"use_dbus", "use_ipv6", "debuglevel", "restore",
2214
"statedir"):
1743
"use_dbus", "use_ipv6", "debuglevel"):
2215
1744
value = getattr(options, option)
2216
1745
if value is not None:
2217
1746
server_settings[option] = value
2229
1758
debuglevel = server_settings["debuglevel"]
2230
1759
use_dbus = server_settings["use_dbus"]
2231
1760
use_ipv6 = server_settings["use_ipv6"]
2232
stored_state_path = os.path.join(server_settings["statedir"],
2233
stored_state_file)
2234
2235
if debug:
2236
initlogger(debug, logging.DEBUG)
2237
else:
2238
if not debuglevel:
2239
initlogger(debug)
2240
else:
2241
level = getattr(logging, debuglevel.upper())
2242
initlogger(debug, level)
2243
1761
2244
1762
if server_settings["servicename"] != "Mandos":
2245
1763
syslogger.setFormatter(logging.Formatter
2246
('Mandos ({0}) [%(process)d]:'
2247
' %(levelname)s: %(message)s'
2248
.format(server_settings
2249
["servicename"])))
1764
('Mandos (%s) [%%(process)d]:'
1765
' %%(levelname)s: %%(message)s'
1766
% server_settings["servicename"]))
2250
1767
2251
1768
# Parse config file with clients
2252
client_config = configparser.SafeConfigParser(Client
2253
.client_defaults)
1769
client_defaults = { "timeout": "1h",
1770
"interval": "5m",
1771
"checker": "fping -q -- %%(host)s",
1772
"host": "",
1773
"approval_delay": "0s",
1774
"approval_duration": "1s",
1775
}
1776
client_config = configparser.SafeConfigParser(client_defaults)
2254
1777
client_config.read(os.path.join(server_settings["configdir"],
2255
1778
"clients.conf"))
2256
1779
2270
1793
pidfilename = "/var/run/mandos.pid"
2271
1794
try:
2272
1795
pidfile = open(pidfilename, "w")
2273
except IOError as e:
2274
logger.error("Could not open file %r", pidfilename,
2275
exc_info=e)
1796
except IOError:
1797
logger.error("Could not open file %r", pidfilename)
2276
1798
2277
for name in ("_mandos", "mandos", "nobody"):
1799
try:
1800
uid = pwd.getpwnam("_mandos").pw_uid
1801
gid = pwd.getpwnam("_mandos").pw_gid
1802
except KeyError:
2278
1803
try:
2279
uid = pwd.getpwnam(name).pw_uid
2280
gid = pwd.getpwnam(name).pw_gid
2281
break
1804
uid = pwd.getpwnam("mandos").pw_uid
1805
gid = pwd.getpwnam("mandos").pw_gid
2282
1806
except KeyError:
2283
continue
2284
else:
2285
uid = 65534
2286
gid = 65534
1807
try:
1808
uid = pwd.getpwnam("nobody").pw_uid
1809
gid = pwd.getpwnam("nobody").pw_gid
1810
except KeyError:
1811
uid = 65534
1812
gid = 65534
2287
1813
try:
2288
1814
os.setgid(gid)
2289
1815
os.setuid(uid)
2290
except OSError as error:
2291
if error.errno != errno.EPERM:
1816
except OSError, error:
1817
if error[0] != errno.EPERM:
2292
1818
raise error
2293
1819
1820
if not debug and not debuglevel:
1821
syslogger.setLevel(logging.WARNING)
1822
console.setLevel(logging.WARNING)
1823
if debuglevel:
1824
level = getattr(logging, debuglevel.upper())
1825
syslogger.setLevel(level)
1826
console.setLevel(level)
1827
2294
1828
if debug:
2295
1829
# Enable all possible GnuTLS debugging
2296
1830
2306
1840
.gnutls_global_set_log_function(debug_gnutls))
2307
1841
2308
1842
# Redirect stdin so all checkers get /dev/null
2309
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1843
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2310
1844
os.dup2(null, sys.stdin.fileno())
2311
1845
if null > 2:
2312
1846
os.close(null)
1847
else:
1848
# No console logging
1849
logger.removeHandler(console)
2313
1850
2314
1851
# Need to fork before connecting to D-Bus
2315
1852
if not debug:
2316
1853
# Close all input and output, do double fork, etc.
2317
1854
daemon()
2318
1855
2319
gobject.threads_init()
2320
2321
1856
global main_loop
2322
1857
# From the Avahi example code
2323
DBusGMainLoop(set_as_default=True)
1858
DBusGMainLoop(set_as_default=True )
2324
1859
main_loop = gobject.MainLoop()
2325
1860
bus = dbus.SystemBus()
2326
1861
# End of Avahi example code
2327
1862
if use_dbus:
2328
1863
try:
2329
bus_name = dbus.service.BusName("se.recompile.Mandos",
1864
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2330
1865
bus, do_not_queue=True)
2331
old_bus_name = (dbus.service.BusName
2332
("se.bsnet.fukt.Mandos", bus,
2333
do_not_queue=True))
2334
except dbus.exceptions.NameExistsException as e:
2335
logger.error("Disabling D-Bus:", exc_info=e)
1866
except dbus.exceptions.NameExistsException, e:
1867
logger.error(unicode(e) + ", disabling D-Bus")
2336
1868
use_dbus = False
2337
1869
server_settings["use_dbus"] = False
2338
1870
tcp_server.use_dbus = False
2339
1871
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2340
service = AvahiServiceToSyslog(name =
2341
server_settings["servicename"],
2342
servicetype = "_mandos._tcp",
2343
protocol = protocol, bus = bus)
1872
service = AvahiService(name = server_settings["servicename"],
1873
servicetype = "_mandos._tcp",
1874
protocol = protocol, bus = bus)
2344
1875
if server_settings["interface"]:
2345
1876
service.interface = (if_nametoindex
2346
1877
(str(server_settings["interface"])))
2351
1882
client_class = Client
2352
1883
if use_dbus:
2353
1884
client_class = functools.partial(ClientDBus, bus = bus)
2354
2355
client_settings = Client.config_parser(client_config)
2356
old_client_settings = {}
2357
clients_data = {}
2358
2359
# Get client data and settings from last running state.
2360
if server_settings["restore"]:
2361
try:
2362
with open(stored_state_path, "rb") as stored_state:
2363
clients_data, old_client_settings = (pickle.load
2364
(stored_state))
2365
os.remove(stored_state_path)
2366
except IOError as e:
2367
if e.errno == errno.ENOENT:
2368
logger.warning("Could not load persistent state: {0}"
2369
.format(os.strerror(e.errno)))
2370
else:
2371
logger.critical("Could not load persistent state:",
2372
exc_info=e)
2373
raise
2374
except EOFError as e:
2375
logger.warning("Could not load persistent state: "
2376
"EOFError:", exc_info=e)
2377
2378
with PGPEngine() as pgp:
2379
for client_name, client in clients_data.iteritems():
2380
# Decide which value to use after restoring saved state.
2381
# We have three different values: Old config file,
2382
# new config file, and saved state.
2383
# New config value takes precedence if it differs from old
2384
# config value, otherwise use saved state.
2385
for name, value in client_settings[client_name].items():
2386
try:
2387
# For each value in new config, check if it
2388
# differs from the old config value (Except for
2389
# the "secret" attribute)
2390
if (name != "secret" and
2391
value != old_client_settings[client_name]
2392
[name]):
2393
client[name] = value
2394
except KeyError:
2395
pass
2396
2397
# Clients who has passed its expire date can still be
2398
# enabled if its last checker was successful. Clients
2399
# whose checker succeeded before we stored its state is
2400
# assumed to have successfully run all checkers during
2401
# downtime.
2402
if client["enabled"]:
2403
if datetime.datetime.utcnow() >= client["expires"]:
2404
if not client["last_checked_ok"]:
2405
logger.warning(
2406
"disabling client {0} - Client never "
2407
"performed a successful checker"
2408
.format(client_name))
2409
client["enabled"] = False
2410
elif client["last_checker_status"] != 0:
2411
logger.warning(
2412
"disabling client {0} - Client "
2413
"last checker failed with error code {1}"
2414
.format(client_name,
2415
client["last_checker_status"]))
2416
client["enabled"] = False
2417
else:
2418
client["expires"] = (datetime.datetime
2419
.utcnow()
2420
+ client["timeout"])
2421
logger.debug("Last checker succeeded,"
2422
" keeping {0} enabled"
2423
.format(client_name))
1885
def client_config_items(config, section):
1886
special_settings = {
1887
"approved_by_default":
1888
lambda: config.getboolean(section,
1889
"approved_by_default"),
1890
}
1891
for name, value in config.items(section):
2424
1892
try:
2425
client["secret"] = (
2426
pgp.decrypt(client["encrypted_secret"],
2427
client_settings[client_name]
2428
["secret"]))
2429
except PGPError:
2430
# If decryption fails, we use secret from new settings
2431
logger.debug("Failed to decrypt {0} old secret"
2432
.format(client_name))
2433
client["secret"] = (
2434
client_settings[client_name]["secret"])
2435
2436
# Add/remove clients based on new changes made to config
2437
for client_name in (set(old_client_settings)
2438
- set(client_settings)):
2439
del clients_data[client_name]
2440
for client_name in (set(client_settings)
2441
- set(old_client_settings)):
2442
clients_data[client_name] = client_settings[client_name]
2443
2444
# Create all client objects
2445
for client_name, client in clients_data.iteritems():
2446
tcp_server.clients[client_name] = client_class(
2447
name = client_name, settings = client)
2448
1893
yield (name, special_settings[name]())
1894
except KeyError:
1895
yield (name, value)
1896
1897
tcp_server.clients.update(set(
1898
client_class(name = section,
1899
config= dict(client_config_items(
1900
client_config, section)))
1901
for section in client_config.sections()))
2449
1902
if not tcp_server.clients:
2450
1903
logger.warning("No clients defined")
2451
1904
2452
1905
if not debug:
2453
1906
try:
2454
1907
with pidfile:
2462
1915
# "pidfile" was never created
2463
1916
pass
2464
1917
del pidfilename
2465
1918
1919
signal.signal(signal.SIGINT, signal.SIG_IGN)
1920
2466
1921
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2467
1922
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2468
1923
2469
1924
if use_dbus:
2470
@alternate_dbus_interfaces({"se.recompile.Mandos":
2471
"se.bsnet.fukt.Mandos"})
2472
class MandosDBusService(DBusObjectWithProperties):
1925
class MandosDBusService(dbus.service.Object):
2473
1926
"""A D-Bus proxy object"""
2474
1927
def __init__(self):
2475
1928
dbus.service.Object.__init__(self, bus, "/")
2476
_interface = "se.recompile.Mandos"
2477
2478
@dbus_interface_annotations(_interface)
2479
def _foo(self):
2480
return { "org.freedesktop.DBus.Property"
2481
".EmitsChangedSignal":
2482
"false"}
1929
_interface = "se.bsnet.fukt.Mandos"
2483
1930
2484
1931
@dbus.service.signal(_interface, signature="o")
2485
1932
def ClientAdded(self, objpath):
2500
1947
def GetAllClients(self):
2501
1948
"D-Bus method"
2502
1949
return dbus.Array(c.dbus_object_path
2503
for c in
2504
tcp_server.clients.itervalues())
1950
for c in tcp_server.clients)
2505
1951
2506
1952
@dbus.service.method(_interface,
2507
1953
out_signature="a{oa{sv}}")
2509
1955
"D-Bus method"
2510
1956
return dbus.Dictionary(
2511
1957
((c.dbus_object_path, c.GetAll(""))
2512
for c in tcp_server.clients.itervalues()),
1958
for c in tcp_server.clients),
2513
1959
signature="oa{sv}")
2514
1960
2515
1961
@dbus.service.method(_interface, in_signature="o")
2516
1962
def RemoveClient(self, object_path):
2517
1963
"D-Bus method"
2518
for c in tcp_server.clients.itervalues():
1964
for c in tcp_server.clients:
2519
1965
if c.dbus_object_path == object_path:
2520
del tcp_server.clients[c.name]
1966
tcp_server.clients.remove(c)
2521
1967
c.remove_from_connection()
2522
1968
# Don't signal anything except ClientRemoved
2523
1969
c.disable(quiet=True)
2534
1980
"Cleanup function; run on exit"
2535
1981
service.cleanup()
2536
1982
2537
multiprocessing.active_children()
2538
if not (tcp_server.clients or client_settings):
2539
return
2540
2541
# Store client before exiting. Secrets are encrypted with key
2542
# based on what config file has. If config file is
2543
# removed/edited, old secret will thus be unrecovable.
2544
clients = {}
2545
with PGPEngine() as pgp:
2546
for client in tcp_server.clients.itervalues():
2547
key = client_settings[client.name]["secret"]
2548
client.encrypted_secret = pgp.encrypt(client.secret,
2549
key)
2550
client_dict = {}
2551
2552
# A list of attributes that can not be pickled
2553
# + secret.
2554
exclude = set(("bus", "changedstate", "secret",
2555
"checker"))
2556
for name, typ in (inspect.getmembers
2557
(dbus.service.Object)):
2558
exclude.add(name)
2559
2560
client_dict["encrypted_secret"] = (client
2561
.encrypted_secret)
2562
for attr in client.client_structure:
2563
if attr not in exclude:
2564
client_dict[attr] = getattr(client, attr)
2565
2566
clients[client.name] = client_dict
2567
del client_settings[client.name]["secret"]
2568
2569
try:
2570
with (tempfile.NamedTemporaryFile
2571
(mode='wb', suffix=".pickle", prefix='clients-',
2572
dir=os.path.dirname(stored_state_path),
2573
delete=False)) as stored_state:
2574
pickle.dump((clients, client_settings), stored_state)
2575
tempname=stored_state.name
2576
os.rename(tempname, stored_state_path)
2577
except (IOError, OSError) as e:
2578
if not debug:
2579
try:
2580
os.remove(tempname)
2581
except NameError:
2582
pass
2583
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2584
logger.warning("Could not save persistent state: {0}"
2585
.format(os.strerror(e.errno)))
2586
else:
2587
logger.warning("Could not save persistent state:",
2588
exc_info=e)
2589
raise e
2590
2591
# Delete all clients, and settings from config
2592
1983
while tcp_server.clients:
2593
name, client = tcp_server.clients.popitem()
1984
client = tcp_server.clients.pop()
2594
1985
if use_dbus:
2595
1986
client.remove_from_connection()
1987
client.disable_hook = None
2596
1988
# Don't signal anything except ClientRemoved
2597
1989
client.disable(quiet=True)
2598
1990
if use_dbus:
2599
1991
# Emit D-Bus signal
2600
mandos_dbus_service.ClientRemoved(client
2601
.dbus_object_path,
1992
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2602
1993
client.name)
2603
client_settings.clear()
2604
1994
2605
1995
atexit.register(cleanup)
2606
1996
2607
for client in tcp_server.clients.itervalues():
1997
for client in tcp_server.clients:
2608
1998
if use_dbus:
2609
1999
# Emit D-Bus signal
2610
2000
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2611
# Need to initiate checking of clients
2612
if client.enabled:
2613
client.init_checker()
2001
client.enable()
2614
2002
2615
2003
tcp_server.enable()
2616
2004
tcp_server.server_activate()
2619
2007
service.port = tcp_server.socket.getsockname()[1]
2620
2008
if use_ipv6:
2621
2009
logger.info("Now listening on address %r, port %d,"
2622
" flowinfo %d, scope_id %d",
2623
*tcp_server.socket.getsockname())
2010
" flowinfo %d, scope_id %d"
2011
% tcp_server.socket.getsockname())
2624
2012
else: # IPv4
2625
logger.info("Now listening on address %r, port %d",
2626
*tcp_server.socket.getsockname())
2013
logger.info("Now listening on address %r, port %d"
2014
% tcp_server.socket.getsockname())
2627
2015
2628
2016
#service.interface = tcp_server.socket.getsockname()[3]
2629
2017
2631
2019
# From the Avahi example code
2632
2020
try:
2633
2021
service.activate()
2634
except dbus.exceptions.DBusException as error:
2635
logger.critical("D-Bus Exception", exc_info=error)
2022
except dbus.exceptions.DBusException, error:
2023
logger.critical("DBusException: %s", error)
2636
2024
cleanup()
2637
2025
sys.exit(1)
2638
2026
# End of Avahi example code
2644
2032
2645
2033
logger.debug("Starting main loop")
2646
2034
main_loop.run()
2647
except AvahiError as error:
2648
logger.critical("Avahi Error", exc_info=error)
2035
except AvahiError, error:
2036
logger.critical("AvahiError: %s", error)
2649
2037
cleanup()
2650
2038
sys.exit(1)
2651
2039
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0