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- Committer: Teddy Hogeborn
- Date: 2011-09-26 19:36:18 UTC
- mfrom: (24.1.184 mandos)
- Revision ID: teddy@fukt.bsnet.se-20110926193618-vtj5c9hena1maixx
Merge from Björn
- files removed:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python2.7
1
#!/usr/bin/python
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# -*- mode: python; coding: utf-8 -*-
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#
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# Mandos server - give out binary blobs to connecting clients.
11
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# "AvahiService" class, and some lines in "main".
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#
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# Everything else is
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# Copyright © 2008-2014 Teddy Hogeborn
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# Copyright © 2008-2014 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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#
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34
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from __future__ import (division, absolute_import, print_function,
35
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unicode_literals)
36
36
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from future_builtins import *
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39
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import SocketServer as socketserver
40
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import socket
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import argparse
64
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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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import collections
72
65
73
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import dbus
74
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import dbus.service
88
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except ImportError:
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SO_BINDTODEVICE = None
90
83
91
version = "1.6.8"
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(b"16s16x", interface))
108
interface_index = struct.unpack("I", ifreq[16:20])[0]
109
return interface_index
110
111
112
def initlogger(debug, level=logging.WARNING):
113
"""init logger and add loglevel"""
114
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global syslogger
116
syslogger = (logging.handlers.SysLogHandler
117
(facility =
118
logging.handlers.SysLogHandler.LOG_DAEMON,
119
address = "/dev/log"))
120
syslogger.setFormatter(logging.Formatter
121
('Mandos [%(process)d]: %(levelname)s:'
122
' %(message)s'))
123
logger.addHandler(syslogger)
124
125
if debug:
126
console = logging.StreamHandler()
127
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
128
' [%(process)d]:'
129
' %(levelname)s:'
130
' %(message)s'))
131
logger.addHandler(console)
132
logger.setLevel(level)
133
134
135
class PGPError(Exception):
136
"""Exception if encryption/decryption fails"""
137
pass
138
139
140
class PGPEngine(object):
141
"""A simple class for OpenPGP symmetric encryption & decryption"""
142
def __init__(self):
143
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
144
self.gnupgargs = ['--batch',
145
'--home', self.tempdir,
146
'--force-mdc',
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'--quiet',
148
'--no-use-agent']
149
150
def __enter__(self):
151
return self
152
153
def __exit__(self, exc_type, exc_value, traceback):
154
self._cleanup()
155
return False
156
157
def __del__(self):
158
self._cleanup()
159
160
def _cleanup(self):
161
if self.tempdir is not None:
162
# Delete contents of tempdir
163
for root, dirs, files in os.walk(self.tempdir,
164
topdown = False):
165
for filename in files:
166
os.remove(os.path.join(root, filename))
167
for dirname in dirs:
168
os.rmdir(os.path.join(root, dirname))
169
# Remove tempdir
170
os.rmdir(self.tempdir)
171
self.tempdir = None
172
173
def password_encode(self, password):
174
# Passphrase can not be empty and can not contain newlines or
175
# NUL bytes. So we prefix it and hex encode it.
176
encoded = b"mandos" + binascii.hexlify(password)
177
if len(encoded) > 2048:
178
# GnuPG can't handle long passwords, so encode differently
179
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
180
.replace(b"\n", b"\\n")
181
.replace(b"\0", b"\\x00"))
182
return encoded
183
184
def encrypt(self, data, password):
185
passphrase = self.password_encode(password)
186
with tempfile.NamedTemporaryFile(dir=self.tempdir
187
) as passfile:
188
passfile.write(passphrase)
189
passfile.flush()
190
proc = subprocess.Popen(['gpg', '--symmetric',
191
'--passphrase-file',
192
passfile.name]
193
+ self.gnupgargs,
194
stdin = subprocess.PIPE,
195
stdout = subprocess.PIPE,
196
stderr = subprocess.PIPE)
197
ciphertext, err = proc.communicate(input = data)
198
if proc.returncode != 0:
199
raise PGPError(err)
200
return ciphertext
201
202
def decrypt(self, data, password):
203
passphrase = self.password_encode(password)
204
with tempfile.NamedTemporaryFile(dir = self.tempdir
205
) as passfile:
206
passfile.write(passphrase)
207
passfile.flush()
208
proc = subprocess.Popen(['gpg', '--decrypt',
209
'--passphrase-file',
210
passfile.name]
211
+ self.gnupgargs,
212
stdin = subprocess.PIPE,
213
stdout = subprocess.PIPE,
214
stderr = subprocess.PIPE)
215
decrypted_plaintext, err = proc.communicate(input
216
= data)
217
if proc.returncode != 0:
218
raise PGPError(err)
219
return decrypted_plaintext
220
84
85
version = "1.3.1"
86
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
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logger.addHandler(syslogger)
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console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
221
102
222
103
class AvahiError(Exception):
223
104
def __init__(self, value, *args, **kwargs):
224
105
self.value = value
225
return super(AvahiError, self).__init__(value, *args,
226
**kwargs)
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
227
109
228
110
class AvahiServiceError(AvahiError):
229
111
pass
240
122
Used to optionally bind to the specified interface.
241
123
name: string; Example: 'Mandos'
242
124
type: string; Example: '_mandos._tcp'.
243
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
244
126
port: integer; what port to announce
245
127
TXT: list of strings; TXT record for the service
246
128
domain: string; Domain to publish on, default to .local if empty.
252
134
server: D-Bus Server
253
135
bus: dbus.SystemBus()
254
136
"""
255
256
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
257
138
servicetype = None, port = None, TXT = None,
258
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domain = "", host = "", max_renames = 32768,
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152
self.server = None
272
153
self.bus = bus
273
154
self.entry_group_state_changed_match = None
274
275
155
def rename(self):
276
156
"""Derived from the Avahi example code"""
277
157
if self.rename_count >= self.max_renames:
279
159
" after %i retries, exiting.",
280
160
self.rename_count)
281
161
raise AvahiServiceError("Too many renames")
282
self.name = unicode(self.server
283
.GetAlternativeServiceName(self.name))
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
284
163
logger.info("Changing Zeroconf service name to %r ...",
285
164
self.name)
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
286
169
self.remove()
287
170
try:
288
171
self.add()
289
172
except dbus.exceptions.DBusException as error:
290
logger.critical("D-Bus Exception", exc_info=error)
173
logger.critical("DBusException: %s", error)
291
174
self.cleanup()
292
175
os._exit(1)
293
176
self.rename_count += 1
294
295
177
def remove(self):
296
178
"""Derived from the Avahi example code"""
297
179
if self.entry_group_state_changed_match is not None:
299
181
self.entry_group_state_changed_match = None
300
182
if self.group is not None:
301
183
self.group.Reset()
302
303
184
def add(self):
304
185
"""Derived from the Avahi example code"""
305
186
self.remove()
310
191
avahi.DBUS_INTERFACE_ENTRY_GROUP)
311
192
self.entry_group_state_changed_match = (
312
193
self.group.connect_to_signal(
313
'StateChanged', self.entry_group_state_changed))
194
'StateChanged', self .entry_group_state_changed))
314
195
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
315
196
self.name, self.type)
316
197
self.group.AddService(
322
203
dbus.UInt16(self.port),
323
204
avahi.string_array_to_txt_array(self.TXT))
324
205
self.group.Commit()
325
326
206
def entry_group_state_changed(self, state, error):
327
207
"""Derived from the Avahi example code"""
328
208
logger.debug("Avahi entry group state change: %i", state)
335
215
elif state == avahi.ENTRY_GROUP_FAILURE:
336
216
logger.critical("Avahi: Error in group state changed %s",
337
217
unicode(error))
338
raise AvahiGroupError("State changed: {!s}"
339
.format(error))
340
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
341
220
def cleanup(self):
342
221
"""Derived from the Avahi example code"""
343
222
if self.group is not None:
344
223
try:
345
224
self.group.Free()
346
225
except (dbus.exceptions.UnknownMethodException,
347
dbus.exceptions.DBusException):
226
dbus.exceptions.DBusException) as e:
348
227
pass
349
228
self.group = None
350
229
self.remove()
351
352
230
def server_state_changed(self, state, error=None):
353
231
"""Derived from the Avahi example code"""
354
232
logger.debug("Avahi server state change: %i", state)
373
251
logger.debug("Unknown state: %r", state)
374
252
else:
375
253
logger.debug("Unknown state: %r: %r", state, error)
376
377
254
def activate(self):
378
255
"""Derived from the Avahi example code"""
379
256
if self.server is None:
387
264
self.server_state_changed(self.server.GetState())
388
265
389
266
390
class AvahiServiceToSyslog(AvahiService):
391
def rename(self):
392
"""Add the new name to the syslog messages"""
393
ret = AvahiService.rename(self)
394
syslogger.setFormatter(logging.Formatter
395
('Mandos ({}) [%(process)d]:'
396
' %(levelname)s: %(message)s'
397
.format(self.name)))
398
return ret
399
400
267
def _timedelta_to_milliseconds(td):
268
"Convert a datetime.timedelta() to milliseconds"
269
return ((td.days * 24 * 60 * 60 * 1000)
270
+ (td.seconds * 1000)
271
+ (td.microseconds // 1000))
272
401
273
class Client(object):
402
274
"""A representation of a client host served by this server.
403
275
404
276
Attributes:
405
approved: bool(); 'None' if not yet approved/disapproved
277
_approved: bool(); 'None' if not yet approved/disapproved
406
278
approval_delay: datetime.timedelta(); Time to wait for approval
407
279
approval_duration: datetime.timedelta(); Duration of one approval
408
280
checker: subprocess.Popen(); a running checker process used
415
287
instance %(name)s can be used in the command.
416
288
checker_initiator_tag: a gobject event source tag, or None
417
289
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
290
current_checker_command: string; current running checker_command
291
disable_hook: If set, called by disable() as disable_hook(self)
421
292
disable_initiator_tag: a gobject event source tag, or None
422
293
enabled: bool()
423
294
fingerprint: string (40 or 32 hexadecimal digits); used to
426
297
interval: datetime.timedelta(); How often to start a new checker
427
298
last_approval_request: datetime.datetime(); (UTC) or None
428
299
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
300
last_enabled: datetime.datetime(); (UTC)
433
301
name: string; from the config file, used in log messages and
434
302
D-Bus identifiers
435
303
secret: bytestring; sent verbatim (over TLS) to client
436
304
timeout: datetime.timedelta(); How long from last_checked_ok
437
305
until this client is disabled
438
extended_timeout: extra long timeout when secret has been sent
306
extended_timeout: extra long timeout when password has been sent
439
307
runtime_expansions: Allowed attributes for runtime expansion.
440
308
expires: datetime.datetime(); time (UTC) when a client will be
441
309
disabled, or None
442
server_settings: The server_settings dict from main()
443
310
"""
444
311
445
312
runtime_expansions = ("approval_delay", "approval_duration",
446
"created", "enabled", "expires",
447
"fingerprint", "host", "interval",
448
"last_approval_request", "last_checked_ok",
313
"created", "enabled", "fingerprint",
314
"host", "interval", "last_checked_ok",
449
315
"last_enabled", "name", "timeout")
450
client_defaults = { "timeout": "PT5M",
451
"extended_timeout": "PT15M",
452
"interval": "PT2M",
453
"checker": "fping -q -- %%(host)s",
454
"host": "",
455
"approval_delay": "PT0S",
456
"approval_duration": "PT1S",
457
"approved_by_default": "True",
458
"enabled": "True",
459
}
460
461
@staticmethod
462
def config_parser(config):
463
"""Construct a new dict of client settings of this form:
464
{ client_name: {setting_name: value, ...}, ...}
465
with exceptions for any special settings as defined above.
466
NOTE: Must be a pure function. Must return the same result
467
value given the same arguments.
468
"""
469
settings = {}
470
for client_name in config.sections():
471
section = dict(config.items(client_name))
472
client = settings[client_name] = {}
473
474
client["host"] = section["host"]
475
# Reformat values from string types to Python types
476
client["approved_by_default"] = config.getboolean(
477
client_name, "approved_by_default")
478
client["enabled"] = config.getboolean(client_name,
479
"enabled")
480
481
client["fingerprint"] = (section["fingerprint"].upper()
482
.replace(" ", ""))
483
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
485
elif "secfile" in section:
486
with open(os.path.expanduser(os.path.expandvars
487
(section["secfile"])),
488
"rb") as secfile:
489
client["secret"] = secfile.read()
490
else:
491
raise TypeError("No secret or secfile for section {}"
492
.format(section))
493
client["timeout"] = string_to_delta(section["timeout"])
494
client["extended_timeout"] = string_to_delta(
495
section["extended_timeout"])
496
client["interval"] = string_to_delta(section["interval"])
497
client["approval_delay"] = string_to_delta(
498
section["approval_delay"])
499
client["approval_duration"] = string_to_delta(
500
section["approval_duration"])
501
client["checker_command"] = section["checker"]
502
client["last_approval_request"] = None
503
client["last_checked_ok"] = None
504
client["last_checker_status"] = -2
505
316
506
return settings
507
508
def __init__(self, settings, name = None, server_settings=None):
317
def timeout_milliseconds(self):
318
"Return the 'timeout' attribute in milliseconds"
319
return _timedelta_to_milliseconds(self.timeout)
320
321
def extended_timeout_milliseconds(self):
322
"Return the 'extended_timeout' attribute in milliseconds"
323
return _timedelta_to_milliseconds(self.extended_timeout)
324
325
def interval_milliseconds(self):
326
"Return the 'interval' attribute in milliseconds"
327
return _timedelta_to_milliseconds(self.interval)
328
329
def approval_delay_milliseconds(self):
330
return _timedelta_to_milliseconds(self.approval_delay)
331
332
def __init__(self, name = None, disable_hook=None, config=None):
333
"""Note: the 'checker' key in 'config' sets the
334
'checker_command' attribute and *not* the 'checker'
335
attribute."""
509
336
self.name = name
510
if server_settings is None:
511
server_settings = {}
512
self.server_settings = server_settings
513
# adding all client settings
514
for setting, value in settings.items():
515
setattr(self, setting, value)
516
517
if self.enabled:
518
if not hasattr(self, "last_enabled"):
519
self.last_enabled = datetime.datetime.utcnow()
520
if not hasattr(self, "expires"):
521
self.expires = (datetime.datetime.utcnow()
522
+ self.timeout)
523
else:
524
self.last_enabled = None
525
self.expires = None
526
337
if config is None:
338
config = {}
527
339
logger.debug("Creating client %r", self.name)
528
340
# Uppercase and remove spaces from fingerprint for later
529
341
# comparison purposes with return value from the fingerprint()
530
342
# function
343
self.fingerprint = (config["fingerprint"].upper()
344
.replace(" ", ""))
531
345
logger.debug(" Fingerprint: %s", self.fingerprint)
532
self.created = settings.get("created",
533
datetime.datetime.utcnow())
534
535
# attributes specific for this server instance
346
if "secret" in config:
347
self.secret = config["secret"].decode("base64")
348
elif "secfile" in config:
349
with open(os.path.expanduser(os.path.expandvars
350
(config["secfile"])),
351
"rb") as secfile:
352
self.secret = secfile.read()
353
else:
354
raise TypeError("No secret or secfile for client %s"
355
% self.name)
356
self.host = config.get("host", "")
357
self.created = datetime.datetime.utcnow()
358
self.enabled = False
359
self.last_approval_request = None
360
self.last_enabled = None
361
self.last_checked_ok = None
362
self.timeout = string_to_delta(config["timeout"])
363
self.extended_timeout = string_to_delta(config["extended_timeout"])
364
self.interval = string_to_delta(config["interval"])
365
self.disable_hook = disable_hook
536
366
self.checker = None
537
367
self.checker_initiator_tag = None
538
368
self.disable_initiator_tag = None
369
self.expires = None
539
370
self.checker_callback_tag = None
371
self.checker_command = config["checker"]
540
372
self.current_checker_command = None
541
self.approved = None
373
self.last_connect = None
374
self._approved = None
375
self.approved_by_default = config.get("approved_by_default",
376
True)
542
377
self.approvals_pending = 0
543
self.changedstate = (multiprocessing_manager
544
.Condition(multiprocessing_manager
545
.Lock()))
546
self.client_structure = [attr for attr in
547
self.__dict__.iterkeys()
548
if not attr.startswith("_")]
549
self.client_structure.append("client_structure")
550
551
for name, t in inspect.getmembers(type(self),
552
lambda obj:
553
isinstance(obj,
554
property)):
555
if not name.startswith("_"):
556
self.client_structure.append(name)
378
self.approval_delay = string_to_delta(
379
config["approval_delay"])
380
self.approval_duration = string_to_delta(
381
config["approval_duration"])
382
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
557
383
558
# Send notice to process children that client state has changed
559
384
def send_changedstate(self):
560
with self.changedstate:
561
self.changedstate.notify_all()
562
385
self.changedstate.acquire()
386
self.changedstate.notify_all()
387
self.changedstate.release()
388
563
389
def enable(self):
564
390
"""Start this client's checker and timeout hooks"""
565
391
if getattr(self, "enabled", False):
566
392
# Already enabled
567
393
return
394
self.send_changedstate()
395
# Schedule a new checker to be started an 'interval' from now,
396
# and every interval from then on.
397
self.checker_initiator_tag = (gobject.timeout_add
398
(self.interval_milliseconds(),
399
self.start_checker))
400
# Schedule a disable() when 'timeout' has passed
568
401
self.expires = datetime.datetime.utcnow() + self.timeout
402
self.disable_initiator_tag = (gobject.timeout_add
403
(self.timeout_milliseconds(),
404
self.disable))
569
405
self.enabled = True
570
406
self.last_enabled = datetime.datetime.utcnow()
571
self.init_checker()
572
self.send_changedstate()
407
# Also start a new checker *right now*.
408
self.start_checker()
573
409
574
410
def disable(self, quiet=True):
575
411
"""Disable this client."""
576
412
if not getattr(self, "enabled", False):
577
413
return False
578
414
if not quiet:
415
self.send_changedstate()
416
if not quiet:
579
417
logger.info("Disabling client %s", self.name)
580
if getattr(self, "disable_initiator_tag", None) is not None:
418
if getattr(self, "disable_initiator_tag", False):
581
419
gobject.source_remove(self.disable_initiator_tag)
582
420
self.disable_initiator_tag = None
583
421
self.expires = None
584
if getattr(self, "checker_initiator_tag", None) is not None:
422
if getattr(self, "checker_initiator_tag", False):
585
423
gobject.source_remove(self.checker_initiator_tag)
586
424
self.checker_initiator_tag = None
587
425
self.stop_checker()
426
if self.disable_hook:
427
self.disable_hook(self)
588
428
self.enabled = False
589
if not quiet:
590
self.send_changedstate()
591
429
# Do not run this again if called by a gobject.timeout_add
592
430
return False
593
431
594
432
def __del__(self):
433
self.disable_hook = None
595
434
self.disable()
596
435
597
def init_checker(self):
598
# Schedule a new checker to be started an 'interval' from now,
599
# and every interval from then on.
600
if self.checker_initiator_tag is not None:
601
gobject.source_remove(self.checker_initiator_tag)
602
self.checker_initiator_tag = (gobject.timeout_add
603
(int(self.interval
604
.total_seconds() * 1000),
605
self.start_checker))
606
# Schedule a disable() when 'timeout' has passed
607
if self.disable_initiator_tag is not None:
608
gobject.source_remove(self.disable_initiator_tag)
609
self.disable_initiator_tag = (gobject.timeout_add
610
(int(self.timeout
611
.total_seconds() * 1000),
612
self.disable))
613
# Also start a new checker *right now*.
614
self.start_checker()
615
616
436
def checker_callback(self, pid, condition, command):
617
437
"""The checker has completed, so take appropriate actions."""
618
438
self.checker_callback_tag = None
619
439
self.checker = None
620
440
if os.WIFEXITED(condition):
621
self.last_checker_status = os.WEXITSTATUS(condition)
622
if self.last_checker_status == 0:
441
exitstatus = os.WEXITSTATUS(condition)
442
if exitstatus == 0:
623
443
logger.info("Checker for %(name)s succeeded",
624
444
vars(self))
625
445
self.checked_ok()
627
447
logger.info("Checker for %(name)s failed",
628
448
vars(self))
629
449
else:
630
self.last_checker_status = -1
631
450
logger.warning("Checker for %(name)s crashed?",
632
451
vars(self))
633
452
634
def checked_ok(self):
635
"""Assert that the client has been seen, alive and well."""
636
self.last_checked_ok = datetime.datetime.utcnow()
637
self.last_checker_status = 0
638
self.bump_timeout()
639
640
def bump_timeout(self, timeout=None):
641
"""Bump up the timeout for this client."""
453
def checked_ok(self, timeout=None):
454
"""Bump up the timeout for this client.
455
456
This should only be called when the client has been seen,
457
alive and well.
458
"""
642
459
if timeout is None:
643
460
timeout = self.timeout
644
if self.disable_initiator_tag is not None:
645
gobject.source_remove(self.disable_initiator_tag)
646
self.disable_initiator_tag = None
647
if getattr(self, "enabled", False):
648
self.disable_initiator_tag = (gobject.timeout_add
649
(int(timeout.total_seconds()
650
* 1000), self.disable))
651
self.expires = datetime.datetime.utcnow() + timeout
461
self.last_checked_ok = datetime.datetime.utcnow()
462
gobject.source_remove(self.disable_initiator_tag)
463
self.expires = datetime.datetime.utcnow() + timeout
464
self.disable_initiator_tag = (gobject.timeout_add
465
(_timedelta_to_milliseconds(timeout),
466
self.disable))
652
467
653
468
def need_approval(self):
654
469
self.last_approval_request = datetime.datetime.utcnow()
659
474
If a checker already exists, leave it running and do
660
475
nothing."""
661
476
# The reason for not killing a running checker is that if we
662
# did that, and if a checker (for some reason) started running
663
# slowly and taking more than 'interval' time, then the client
664
# would inevitably timeout, since no checker would get a
665
# chance to run to completion. If we instead leave running
477
# did that, then if a checker (for some reason) started
478
# running slowly and taking more than 'interval' time, the
479
# client would inevitably timeout, since no checker would get
480
# a chance to run to completion. If we instead leave running
666
481
# checkers alone, the checker would have to take more time
667
482
# than 'timeout' for the client to be disabled, which is as it
668
483
# should be.
670
485
# If a checker exists, make sure it is not a zombie
671
486
try:
672
487
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
673
except AttributeError:
674
pass
675
except OSError as error:
676
if error.errno != errno.ECHILD:
677
raise
488
except (AttributeError, OSError) as error:
489
if (isinstance(error, OSError)
490
and error.errno != errno.ECHILD):
491
raise error
678
492
else:
679
493
if pid:
680
494
logger.warning("Checker was a zombie")
683
497
self.current_checker_command)
684
498
# Start a new checker if needed
685
499
if self.checker is None:
686
# Escape attributes for the shell
687
escaped_attrs = { attr:
688
re.escape(unicode(getattr(self,
689
attr)))
690
for attr in self.runtime_expansions }
691
500
try:
692
command = self.checker_command % escaped_attrs
693
except TypeError as error:
694
logger.error('Could not format string "%s"',
695
self.checker_command, exc_info=error)
696
return True # Try again later
501
# In case checker_command has exactly one % operator
502
command = self.checker_command % self.host
503
except TypeError:
504
# Escape attributes for the shell
505
escaped_attrs = dict(
506
(attr,
507
re.escape(unicode(str(getattr(self, attr, "")),
508
errors=
509
'replace')))
510
for attr in
511
self.runtime_expansions)
512
513
try:
514
command = self.checker_command % escaped_attrs
515
except TypeError as error:
516
logger.error('Could not format string "%s":'
517
' %s', self.checker_command, error)
518
return True # Try again later
697
519
self.current_checker_command = command
698
520
try:
699
521
logger.info("Starting checker %r for %s",
702
524
# in normal mode, that is already done by daemon(),
703
525
# and in debug mode we don't want to. (Stdin is
704
526
# always replaced by /dev/null.)
705
# The exception is when not debugging but nevertheless
706
# running in the foreground; use the previously
707
# created wnull.
708
popen_args = {}
709
if (not self.server_settings["debug"]
710
and self.server_settings["foreground"]):
711
popen_args.update({"stdout": wnull,
712
"stderr": wnull })
713
527
self.checker = subprocess.Popen(command,
714
528
close_fds=True,
715
shell=True, cwd="/",
716
**popen_args)
717
except OSError as error:
718
logger.error("Failed to start subprocess",
719
exc_info=error)
720
return True
721
self.checker_callback_tag = (gobject.child_watch_add
722
(self.checker.pid,
723
self.checker_callback,
724
data=command))
725
# The checker may have completed before the gobject
726
# watch was added. Check for this.
727
try:
529
shell=True, cwd="/")
530
self.checker_callback_tag = (gobject.child_watch_add
531
(self.checker.pid,
532
self.checker_callback,
533
data=command))
534
# The checker may have completed before the gobject
535
# watch was added. Check for this.
728
536
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
537
if pid:
538
gobject.source_remove(self.checker_callback_tag)
539
self.checker_callback(pid, status, command)
729
540
except OSError as error:
730
if error.errno == errno.ECHILD:
731
# This should never happen
732
logger.error("Child process vanished",
733
exc_info=error)
734
return True
735
raise
736
if pid:
737
gobject.source_remove(self.checker_callback_tag)
738
self.checker_callback(pid, status, command)
541
logger.error("Failed to start subprocess: %s",
542
error)
739
543
# Re-run this periodically if run by gobject.timeout_add
740
544
return True
741
545
748
552
return
749
553
logger.debug("Stopping checker for %(name)s", vars(self))
750
554
try:
751
self.checker.terminate()
555
os.kill(self.checker.pid, signal.SIGTERM)
752
556
#time.sleep(0.5)
753
557
#if self.checker.poll() is None:
754
# self.checker.kill()
558
# os.kill(self.checker.pid, signal.SIGKILL)
755
559
except OSError as error:
756
560
if error.errno != errno.ESRCH: # No such process
757
561
raise
758
562
self.checker = None
759
563
760
761
564
def dbus_service_property(dbus_interface, signature="v",
762
565
access="readwrite", byte_arrays=False):
763
566
"""Decorators for marking methods of a DBusObjectWithProperties to
774
577
# "Set" method, so we fail early here:
775
578
if byte_arrays and signature != "ay":
776
579
raise ValueError("Byte arrays not supported for non-'ay'"
777
" signature {!r}".format(signature))
580
" signature %r" % signature)
778
581
def decorator(func):
779
582
func._dbus_is_property = True
780
583
func._dbus_interface = dbus_interface
788
591
return decorator
789
592
790
593
791
def dbus_interface_annotations(dbus_interface):
792
"""Decorator for marking functions returning interface annotations
793
794
Usage:
795
796
@dbus_interface_annotations("org.example.Interface")
797
def _foo(self): # Function name does not matter
798
return {"org.freedesktop.DBus.Deprecated": "true",
799
"org.freedesktop.DBus.Property.EmitsChangedSignal":
800
"false"}
801
"""
802
def decorator(func):
803
func._dbus_is_interface = True
804
func._dbus_interface = dbus_interface
805
func._dbus_name = dbus_interface
806
return func
807
return decorator
808
809
810
def dbus_annotations(annotations):
811
"""Decorator to annotate D-Bus methods, signals or properties
812
Usage:
813
814
@dbus_service_property("org.example.Interface", signature="b",
815
access="r")
816
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
817
"org.freedesktop.DBus.Property."
818
"EmitsChangedSignal": "false"})
819
def Property_dbus_property(self):
820
return dbus.Boolean(False)
821
"""
822
def decorator(func):
823
func._dbus_annotations = annotations
824
return func
825
return decorator
826
827
828
594
class DBusPropertyException(dbus.exceptions.DBusException):
829
595
"""A base class for D-Bus property-related exceptions
830
596
"""
831
pass
597
def __unicode__(self):
598
return unicode(str(self))
599
832
600
833
601
class DBusPropertyAccessException(DBusPropertyException):
834
602
"""A property's access permissions disallows an operation.
844
612
845
613
class DBusObjectWithProperties(dbus.service.Object):
846
614
"""A D-Bus object with properties.
847
615
848
616
Classes inheriting from this can use the dbus_service_property
849
617
decorator to expose methods as D-Bus properties. It exposes the
850
618
standard Get(), Set(), and GetAll() methods on the D-Bus.
851
619
"""
852
620
853
621
@staticmethod
854
def _is_dbus_thing(thing):
855
"""Returns a function testing if an attribute is a D-Bus thing
856
857
If called like _is_dbus_thing("method") it returns a function
858
suitable for use as predicate to inspect.getmembers().
859
"""
860
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
861
False)
622
def _is_dbus_property(obj):
623
return getattr(obj, "_dbus_is_property", False)
862
624
863
def _get_all_dbus_things(self, thing):
625
def _get_all_dbus_properties(self):
864
626
"""Returns a generator of (name, attribute) pairs
865
627
"""
866
return ((getattr(athing.__get__(self), "_dbus_name",
867
name),
868
athing.__get__(self))
869
for cls in self.__class__.__mro__
870
for name, athing in
871
inspect.getmembers(cls,
872
self._is_dbus_thing(thing)))
628
return ((prop._dbus_name, prop)
629
for name, prop in
630
inspect.getmembers(self, self._is_dbus_property))
873
631
874
632
def _get_dbus_property(self, interface_name, property_name):
875
633
"""Returns a bound method if one exists which is a D-Bus
876
634
property with the specified name and interface.
877
635
"""
878
for cls in self.__class__.__mro__:
879
for name, value in (inspect.getmembers
880
(cls,
881
self._is_dbus_thing("property"))):
882
if (value._dbus_name == property_name
883
and value._dbus_interface == interface_name):
884
return value.__get__(self)
885
636
for name in (property_name,
637
property_name + "_dbus_property"):
638
prop = getattr(self, name, None)
639
if (prop is None
640
or not self._is_dbus_property(prop)
641
or prop._dbus_name != property_name
642
or (interface_name and prop._dbus_interface
643
and interface_name != prop._dbus_interface)):
644
continue
645
return prop
886
646
# No such property
887
647
raise DBusPropertyNotFound(self.dbus_object_path + ":"
888
648
+ interface_name + "."
912
672
# The byte_arrays option is not supported yet on
913
673
# signatures other than "ay".
914
674
if prop._dbus_signature != "ay":
915
raise ValueError("Byte arrays not supported for non-"
916
"'ay' signature {!r}"
917
.format(prop._dbus_signature))
918
value = dbus.ByteArray(b''.join(chr(byte)
919
for byte in value))
675
raise ValueError
676
value = dbus.ByteArray(''.join(unichr(byte)
677
for byte in value))
920
678
prop(value)
921
679
922
680
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
924
682
def GetAll(self, interface_name):
925
683
"""Standard D-Bus property GetAll() method, see D-Bus
926
684
standard.
927
685
928
686
Note: Will not include properties with access="write".
929
687
"""
930
properties = {}
931
for name, prop in self._get_all_dbus_things("property"):
688
all = {}
689
for name, prop in self._get_all_dbus_properties():
932
690
if (interface_name
933
691
and interface_name != prop._dbus_interface):
934
692
# Interface non-empty but did not match
938
696
continue
939
697
value = prop()
940
698
if not hasattr(value, "variant_level"):
941
properties[name] = value
699
all[name] = value
942
700
continue
943
properties[name] = type(value)(value, variant_level=
944
value.variant_level+1)
945
return dbus.Dictionary(properties, signature="sv")
701
all[name] = type(value)(value, variant_level=
702
value.variant_level+1)
703
return dbus.Dictionary(all, signature="sv")
946
704
947
705
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
948
706
out_signature="s",
949
707
path_keyword='object_path',
950
708
connection_keyword='connection')
951
709
def Introspect(self, object_path, connection):
952
"""Overloading of standard D-Bus method.
953
954
Inserts property tags and interface annotation tags.
710
"""Standard D-Bus method, overloaded to insert property tags.
955
711
"""
956
712
xmlstring = dbus.service.Object.Introspect(self, object_path,
957
713
connection)
964
720
e.setAttribute("access", prop._dbus_access)
965
721
return e
966
722
for if_tag in document.getElementsByTagName("interface"):
967
# Add property tags
968
723
for tag in (make_tag(document, name, prop)
969
724
for name, prop
970
in self._get_all_dbus_things("property")
725
in self._get_all_dbus_properties()
971
726
if prop._dbus_interface
972
727
== if_tag.getAttribute("name")):
973
728
if_tag.appendChild(tag)
974
# Add annotation tags
975
for typ in ("method", "signal", "property"):
976
for tag in if_tag.getElementsByTagName(typ):
977
annots = dict()
978
for name, prop in (self.
979
_get_all_dbus_things(typ)):
980
if (name == tag.getAttribute("name")
981
and prop._dbus_interface
982
== if_tag.getAttribute("name")):
983
annots.update(getattr
984
(prop,
985
"_dbus_annotations",
986
{}))
987
for name, value in annots.items():
988
ann_tag = document.createElement(
989
"annotation")
990
ann_tag.setAttribute("name", name)
991
ann_tag.setAttribute("value", value)
992
tag.appendChild(ann_tag)
993
# Add interface annotation tags
994
for annotation, value in dict(
995
itertools.chain.from_iterable(
996
annotations().items()
997
for name, annotations in
998
self._get_all_dbus_things("interface")
999
if name == if_tag.getAttribute("name")
1000
)).items():
1001
ann_tag = document.createElement("annotation")
1002
ann_tag.setAttribute("name", annotation)
1003
ann_tag.setAttribute("value", value)
1004
if_tag.appendChild(ann_tag)
1005
729
# Add the names to the return values for the
1006
730
# "org.freedesktop.DBus.Properties" methods
1007
731
if (if_tag.getAttribute("name")
1022
746
except (AttributeError, xml.dom.DOMException,
1023
747
xml.parsers.expat.ExpatError) as error:
1024
748
logger.error("Failed to override Introspection method",
1025
exc_info=error)
749
error)
1026
750
return xmlstring
1027
751
1028
752
1029
def datetime_to_dbus(dt, variant_level=0):
753
def datetime_to_dbus (dt, variant_level=0):
1030
754
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1031
755
if dt is None:
1032
756
return dbus.String("", variant_level = variant_level)
1033
757
return dbus.String(dt.isoformat(),
1034
758
variant_level=variant_level)
1035
759
1036
1037
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1038
"""A class decorator; applied to a subclass of
1039
dbus.service.Object, it will add alternate D-Bus attributes with
1040
interface names according to the "alt_interface_names" mapping.
1041
Usage:
1042
1043
@alternate_dbus_interfaces({"org.example.Interface":
1044
"net.example.AlternateInterface"})
1045
class SampleDBusObject(dbus.service.Object):
1046
@dbus.service.method("org.example.Interface")
1047
def SampleDBusMethod():
1048
pass
1049
1050
The above "SampleDBusMethod" on "SampleDBusObject" will be
1051
reachable via two interfaces: "org.example.Interface" and
1052
"net.example.AlternateInterface", the latter of which will have
1053
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1054
"true", unless "deprecate" is passed with a False value.
1055
1056
This works for methods and signals, and also for D-Bus properties
1057
(from DBusObjectWithProperties) and interfaces (from the
1058
dbus_interface_annotations decorator).
1059
"""
1060
def wrapper(cls):
1061
for orig_interface_name, alt_interface_name in (
1062
alt_interface_names.items()):
1063
attr = {}
1064
interface_names = set()
1065
# Go though all attributes of the class
1066
for attrname, attribute in inspect.getmembers(cls):
1067
# Ignore non-D-Bus attributes, and D-Bus attributes
1068
# with the wrong interface name
1069
if (not hasattr(attribute, "_dbus_interface")
1070
or not attribute._dbus_interface
1071
.startswith(orig_interface_name)):
1072
continue
1073
# Create an alternate D-Bus interface name based on
1074
# the current name
1075
alt_interface = (attribute._dbus_interface
1076
.replace(orig_interface_name,
1077
alt_interface_name))
1078
interface_names.add(alt_interface)
1079
# Is this a D-Bus signal?
1080
if getattr(attribute, "_dbus_is_signal", False):
1081
# Extract the original non-method undecorated
1082
# function by black magic
1083
nonmethod_func = (dict(
1084
zip(attribute.func_code.co_freevars,
1085
attribute.__closure__))["func"]
1086
.cell_contents)
1087
# Create a new, but exactly alike, function
1088
# object, and decorate it to be a new D-Bus signal
1089
# with the alternate D-Bus interface name
1090
new_function = (dbus.service.signal
1091
(alt_interface,
1092
attribute._dbus_signature)
1093
(types.FunctionType(
1094
nonmethod_func.func_code,
1095
nonmethod_func.func_globals,
1096
nonmethod_func.func_name,
1097
nonmethod_func.func_defaults,
1098
nonmethod_func.func_closure)))
1099
# Copy annotations, if any
1100
try:
1101
new_function._dbus_annotations = (
1102
dict(attribute._dbus_annotations))
1103
except AttributeError:
1104
pass
1105
# Define a creator of a function to call both the
1106
# original and alternate functions, so both the
1107
# original and alternate signals gets sent when
1108
# the function is called
1109
def fixscope(func1, func2):
1110
"""This function is a scope container to pass
1111
func1 and func2 to the "call_both" function
1112
outside of its arguments"""
1113
def call_both(*args, **kwargs):
1114
"""This function will emit two D-Bus
1115
signals by calling func1 and func2"""
1116
func1(*args, **kwargs)
1117
func2(*args, **kwargs)
1118
return call_both
1119
# Create the "call_both" function and add it to
1120
# the class
1121
attr[attrname] = fixscope(attribute, new_function)
1122
# Is this a D-Bus method?
1123
elif getattr(attribute, "_dbus_is_method", False):
1124
# Create a new, but exactly alike, function
1125
# object. Decorate it to be a new D-Bus method
1126
# with the alternate D-Bus interface name. Add it
1127
# to the class.
1128
attr[attrname] = (dbus.service.method
1129
(alt_interface,
1130
attribute._dbus_in_signature,
1131
attribute._dbus_out_signature)
1132
(types.FunctionType
1133
(attribute.func_code,
1134
attribute.func_globals,
1135
attribute.func_name,
1136
attribute.func_defaults,
1137
attribute.func_closure)))
1138
# Copy annotations, if any
1139
try:
1140
attr[attrname]._dbus_annotations = (
1141
dict(attribute._dbus_annotations))
1142
except AttributeError:
1143
pass
1144
# Is this a D-Bus property?
1145
elif getattr(attribute, "_dbus_is_property", False):
1146
# Create a new, but exactly alike, function
1147
# object, and decorate it to be a new D-Bus
1148
# property with the alternate D-Bus interface
1149
# name. Add it to the class.
1150
attr[attrname] = (dbus_service_property
1151
(alt_interface,
1152
attribute._dbus_signature,
1153
attribute._dbus_access,
1154
attribute
1155
._dbus_get_args_options
1156
["byte_arrays"])
1157
(types.FunctionType
1158
(attribute.func_code,
1159
attribute.func_globals,
1160
attribute.func_name,
1161
attribute.func_defaults,
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
1169
# Is this a D-Bus interface?
1170
elif getattr(attribute, "_dbus_is_interface", False):
1171
# Create a new, but exactly alike, function
1172
# object. Decorate it to be a new D-Bus interface
1173
# with the alternate D-Bus interface name. Add it
1174
# to the class.
1175
attr[attrname] = (dbus_interface_annotations
1176
(alt_interface)
1177
(types.FunctionType
1178
(attribute.func_code,
1179
attribute.func_globals,
1180
attribute.func_name,
1181
attribute.func_defaults,
1182
attribute.func_closure)))
1183
if deprecate:
1184
# Deprecate all alternate interfaces
1185
iname="_AlternateDBusNames_interface_annotation{}"
1186
for interface_name in interface_names:
1187
@dbus_interface_annotations(interface_name)
1188
def func(self):
1189
return { "org.freedesktop.DBus.Deprecated":
1190
"true" }
1191
# Find an unused name
1192
for aname in (iname.format(i)
1193
for i in itertools.count()):
1194
if aname not in attr:
1195
attr[aname] = func
1196
break
1197
if interface_names:
1198
# Replace the class with a new subclass of it with
1199
# methods, signals, etc. as created above.
1200
cls = type(b"{}Alternate".format(cls.__name__),
1201
(cls,), attr)
1202
return cls
1203
return wrapper
1204
1205
1206
@alternate_dbus_interfaces({"se.recompile.Mandos":
1207
"se.bsnet.fukt.Mandos"})
1208
760
class ClientDBus(Client, DBusObjectWithProperties):
1209
761
"""A Client class using D-Bus
1210
762
1219
771
# dbus.service.Object doesn't use super(), so we can't either.
1220
772
1221
773
def __init__(self, bus = None, *args, **kwargs):
774
self._approvals_pending = 0
1222
775
self.bus = bus
1223
776
Client.__init__(self, *args, **kwargs)
1224
777
# Only now, when this client is initialized, can it show up on
1230
783
("/clients/" + client_object_name))
1231
784
DBusObjectWithProperties.__init__(self, self.bus,
1232
785
self.dbus_object_path)
1233
786
1234
787
def notifychangeproperty(transform_func,
1235
788
dbus_name, type_func=lambda x: x,
1236
789
variant_level=1):
1237
""" Modify a variable so that it's a property which announces
1238
its changes to DBus.
1239
1240
transform_fun: Function that takes a value and a variant_level
1241
and transforms it to a D-Bus type.
1242
dbus_name: D-Bus name of the variable
790
""" Modify a variable so that its a property that announce its
791
changes to DBus.
792
transform_fun: Function that takes a value and transform it to
793
DBus type.
794
dbus_name: DBus name of the variable
1243
795
type_func: Function that transform the value before sending it
1244
to the D-Bus. Default: no transform
1245
variant_level: D-Bus variant level. Default: 1
796
to DBus
797
variant_level: DBus variant level. default: 1
1246
798
"""
1247
attrname = "_{}".format(dbus_name)
799
real_value = [None,]
1248
800
def setter(self, value):
801
old_value = real_value[0]
802
real_value[0] = value
1249
803
if hasattr(self, "dbus_object_path"):
1250
if (not hasattr(self, attrname) or
1251
type_func(getattr(self, attrname, None))
1252
!= type_func(value)):
1253
dbus_value = transform_func(type_func(value),
1254
variant_level
1255
=variant_level)
804
if type_func(old_value) != type_func(real_value[0]):
805
dbus_value = transform_func(type_func(real_value[0]),
806
variant_level)
1256
807
self.PropertyChanged(dbus.String(dbus_name),
1257
808
dbus_value)
1258
setattr(self, attrname, value)
1259
1260
return property(lambda self: getattr(self, attrname), setter)
1261
809
810
return property(lambda self: real_value[0], setter)
811
812
1262
813
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1263
814
approvals_pending = notifychangeproperty(dbus.Boolean,
1264
815
"ApprovalPending",
1267
818
last_enabled = notifychangeproperty(datetime_to_dbus,
1268
819
"LastEnabled")
1269
820
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1270
type_func = lambda checker:
1271
checker is not None)
821
type_func = lambda checker: checker is not None)
1272
822
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1273
823
"LastCheckedOK")
1274
last_checker_status = notifychangeproperty(dbus.Int16,
1275
"LastCheckerStatus")
1276
last_approval_request = notifychangeproperty(
1277
datetime_to_dbus, "LastApprovalRequest")
824
last_approval_request = notifychangeproperty(datetime_to_dbus,
825
"LastApprovalRequest")
1278
826
approved_by_default = notifychangeproperty(dbus.Boolean,
1279
827
"ApprovedByDefault")
1280
approval_delay = notifychangeproperty(dbus.UInt64,
1281
"ApprovalDelay",
1282
type_func =
1283
lambda td: td.total_seconds()
1284
* 1000)
1285
approval_duration = notifychangeproperty(
1286
dbus.UInt64, "ApprovalDuration",
1287
type_func = lambda td: td.total_seconds() * 1000)
828
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
829
type_func = _timedelta_to_milliseconds)
830
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
831
type_func = _timedelta_to_milliseconds)
1288
832
host = notifychangeproperty(dbus.String, "Host")
1289
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1290
type_func = lambda td:
1291
td.total_seconds() * 1000)
1292
extended_timeout = notifychangeproperty(
1293
dbus.UInt64, "ExtendedTimeout",
1294
type_func = lambda td: td.total_seconds() * 1000)
1295
interval = notifychangeproperty(dbus.UInt64,
1296
"Interval",
1297
type_func =
1298
lambda td: td.total_seconds()
1299
* 1000)
833
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
834
type_func = _timedelta_to_milliseconds)
835
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
836
type_func = _timedelta_to_milliseconds)
837
interval = notifychangeproperty(dbus.UInt16, "Interval",
838
type_func = _timedelta_to_milliseconds)
1300
839
checker_command = notifychangeproperty(dbus.String, "Checker")
1301
840
1302
841
del notifychangeproperty
1328
867
1329
868
return Client.checker_callback(self, pid, condition, command,
1330
869
*args, **kwargs)
1331
870
1332
871
def start_checker(self, *args, **kwargs):
1333
old_checker_pid = getattr(self.checker, "pid", None)
872
old_checker = self.checker
873
if self.checker is not None:
874
old_checker_pid = self.checker.pid
875
else:
876
old_checker_pid = None
1334
877
r = Client.start_checker(self, *args, **kwargs)
1335
878
# Only if new checker process was started
1336
879
if (self.checker is not None
1340
883
return r
1341
884
1342
885
def _reset_approved(self):
1343
self.approved = None
886
self._approved = None
1344
887
return False
1345
888
1346
889
def approve(self, value=True):
1347
self.approved = value
1348
gobject.timeout_add(int(self.approval_duration.total_seconds()
1349
* 1000), self._reset_approved)
1350
890
self.send_changedstate()
891
self._approved = value
892
gobject.timeout_add(_timedelta_to_milliseconds
893
(self.approval_duration),
894
self._reset_approved)
895
1351
896
1352
897
## D-Bus methods, signals & properties
1353
_interface = "se.recompile.Mandos.Client"
1354
1355
## Interfaces
1356
1357
@dbus_interface_annotations(_interface)
1358
def _foo(self):
1359
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1360
"false"}
898
_interface = "se.bsnet.fukt.Mandos.Client"
1361
899
1362
900
## Signals
1363
901
1455
993
access="readwrite")
1456
994
def ApprovalDelay_dbus_property(self, value=None):
1457
995
if value is None: # get
1458
return dbus.UInt64(self.approval_delay.total_seconds()
1459
* 1000)
996
return dbus.UInt64(self.approval_delay_milliseconds())
1460
997
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1461
998
1462
999
# ApprovalDuration - property
1464
1001
access="readwrite")
1465
1002
def ApprovalDuration_dbus_property(self, value=None):
1466
1003
if value is None: # get
1467
return dbus.UInt64(self.approval_duration.total_seconds()
1468
* 1000)
1004
return dbus.UInt64(_timedelta_to_milliseconds(
1005
self.approval_duration))
1469
1006
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1470
1007
1471
1008
# Name - property
1484
1021
def Host_dbus_property(self, value=None):
1485
1022
if value is None: # get
1486
1023
return dbus.String(self.host)
1487
self.host = unicode(value)
1024
self.host = value
1488
1025
1489
1026
# Created - property
1490
1027
@dbus_service_property(_interface, signature="s", access="read")
1491
1028
def Created_dbus_property(self):
1492
return datetime_to_dbus(self.created)
1029
return dbus.String(datetime_to_dbus(self.created))
1493
1030
1494
1031
# LastEnabled - property
1495
1032
@dbus_service_property(_interface, signature="s", access="read")
1516
1053
return
1517
1054
return datetime_to_dbus(self.last_checked_ok)
1518
1055
1519
# LastCheckerStatus - property
1520
@dbus_service_property(_interface, signature="n",
1521
access="read")
1522
def LastCheckerStatus_dbus_property(self):
1523
return dbus.Int16(self.last_checker_status)
1524
1525
1056
# Expires - property
1526
1057
@dbus_service_property(_interface, signature="s", access="read")
1527
1058
def Expires_dbus_property(self):
1537
1068
access="readwrite")
1538
1069
def Timeout_dbus_property(self, value=None):
1539
1070
if value is None: # get
1540
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1541
old_timeout = self.timeout
1071
return dbus.UInt64(self.timeout_milliseconds())
1542
1072
self.timeout = datetime.timedelta(0, 0, 0, value)
1543
# Reschedule disabling
1544
if self.enabled:
1545
now = datetime.datetime.utcnow()
1546
self.expires += self.timeout - old_timeout
1547
if self.expires <= now:
1548
# The timeout has passed
1549
self.disable()
1550
else:
1551
if (getattr(self, "disable_initiator_tag", None)
1552
is None):
1553
return
1554
gobject.source_remove(self.disable_initiator_tag)
1555
self.disable_initiator_tag = (
1556
gobject.timeout_add(
1557
int((self.expires - now).total_seconds()
1558
* 1000), self.disable))
1559
1073
if getattr(self, "disable_initiator_tag", None) is None:
1074
return
1075
# Reschedule timeout
1076
gobject.source_remove(self.disable_initiator_tag)
1077
self.disable_initiator_tag = None
1078
self.expires = None
1079
time_to_die = (self.
1080
_timedelta_to_milliseconds((self
1081
.last_checked_ok
1082
+ self.timeout)
1083
- datetime.datetime
1084
.utcnow()))
1085
if time_to_die <= 0:
1086
# The timeout has passed
1087
self.disable()
1088
else:
1089
self.expires = (datetime.datetime.utcnow()
1090
+ datetime.timedelta(milliseconds = time_to_die))
1091
self.disable_initiator_tag = (gobject.timeout_add
1092
(time_to_die, self.disable))
1093
1560
1094
# ExtendedTimeout - property
1561
1095
@dbus_service_property(_interface, signature="t",
1562
1096
access="readwrite")
1563
1097
def ExtendedTimeout_dbus_property(self, value=None):
1564
1098
if value is None: # get
1565
return dbus.UInt64(self.extended_timeout.total_seconds()
1566
* 1000)
1099
return dbus.UInt64(self.extended_timeout_milliseconds())
1567
1100
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1568
1101
1569
1102
# Interval - property
1570
1103
@dbus_service_property(_interface, signature="t",
1571
1104
access="readwrite")
1572
1105
def Interval_dbus_property(self, value=None):
1573
1106
if value is None: # get
1574
return dbus.UInt64(self.interval.total_seconds() * 1000)
1107
return dbus.UInt64(self.interval_milliseconds())
1575
1108
self.interval = datetime.timedelta(0, 0, 0, value)
1576
1109
if getattr(self, "checker_initiator_tag", None) is None:
1577
1110
return
1578
if self.enabled:
1579
# Reschedule checker run
1580
gobject.source_remove(self.checker_initiator_tag)
1581
self.checker_initiator_tag = (gobject.timeout_add
1582
(value, self.start_checker))
1583
self.start_checker() # Start one now, too
1584
1111
# Reschedule checker run
1112
gobject.source_remove(self.checker_initiator_tag)
1113
self.checker_initiator_tag = (gobject.timeout_add
1114
(value, self.start_checker))
1115
self.start_checker() # Start one now, too
1116
1585
1117
# Checker - property
1586
1118
@dbus_service_property(_interface, signature="s",
1587
1119
access="readwrite")
1588
1120
def Checker_dbus_property(self, value=None):
1589
1121
if value is None: # get
1590
1122
return dbus.String(self.checker_command)
1591
self.checker_command = unicode(value)
1123
self.checker_command = value
1592
1124
1593
1125
# CheckerRunning - property
1594
1126
@dbus_service_property(_interface, signature="b",
1610
1142
@dbus_service_property(_interface, signature="ay",
1611
1143
access="write", byte_arrays=True)
1612
1144
def Secret_dbus_property(self, value):
1613
self.secret = bytes(value)
1145
self.secret = str(value)
1614
1146
1615
1147
del _interface
1616
1148
1621
1153
self._pipe.send(('init', fpr, address))
1622
1154
if not self._pipe.recv():
1623
1155
raise KeyError()
1624
1156
1625
1157
def __getattribute__(self, name):
1626
if name == '_pipe':
1158
if(name == '_pipe'):
1627
1159
return super(ProxyClient, self).__getattribute__(name)
1628
1160
self._pipe.send(('getattr', name))
1629
1161
data = self._pipe.recv()
1634
1166
self._pipe.send(('funcall', name, args, kwargs))
1635
1167
return self._pipe.recv()[1]
1636
1168
return func
1637
1169
1638
1170
def __setattr__(self, name, value):
1639
if name == '_pipe':
1171
if(name == '_pipe'):
1640
1172
return super(ProxyClient, self).__setattr__(name, value)
1641
1173
self._pipe.send(('setattr', name, value))
1642
1174
1653
1185
unicode(self.client_address))
1654
1186
logger.debug("Pipe FD: %d",
1655
1187
self.server.child_pipe.fileno())
1656
1188
1657
1189
session = (gnutls.connection
1658
1190
.ClientSession(self.request,
1659
1191
gnutls.connection
1660
1192
.X509Credentials()))
1661
1193
1662
1194
# Note: gnutls.connection.X509Credentials is really a
1663
1195
# generic GnuTLS certificate credentials object so long as
1664
1196
# no X.509 keys are added to it. Therefore, we can use it
1665
1197
# here despite using OpenPGP certificates.
1666
1198
1667
1199
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1668
1200
# "+AES-256-CBC", "+SHA1",
1669
1201
# "+COMP-NULL", "+CTYPE-OPENPGP",
1675
1207
(gnutls.library.functions
1676
1208
.gnutls_priority_set_direct(session._c_object,
1677
1209
priority, None))
1678
1210
1679
1211
# Start communication using the Mandos protocol
1680
1212
# Get protocol number
1681
1213
line = self.request.makefile().readline()
1682
1214
logger.debug("Protocol version: %r", line)
1683
1215
try:
1684
1216
if int(line.strip().split()[0]) > 1:
1685
raise RuntimeError(line)
1217
raise RuntimeError
1686
1218
except (ValueError, IndexError, RuntimeError) as error:
1687
1219
logger.error("Unknown protocol version: %s", error)
1688
1220
return
1689
1221
1690
1222
# Start GnuTLS connection
1691
1223
try:
1692
1224
session.handshake()
1696
1228
# established. Just abandon the request.
1697
1229
return
1698
1230
logger.debug("Handshake succeeded")
1699
1231
1700
1232
approval_required = False
1701
1233
try:
1702
1234
try:
1707
1239
logger.warning("Bad certificate: %s", error)
1708
1240
return
1709
1241
logger.debug("Fingerprint: %s", fpr)
1710
1242
1711
1243
try:
1712
1244
client = ProxyClient(child_pipe, fpr,
1713
1245
self.client_address)
1725
1257
client.name)
1726
1258
if self.server.use_dbus:
1727
1259
# Emit D-Bus signal
1728
client.Rejected("Disabled")
1260
client.Rejected("Disabled")
1729
1261
return
1730
1262
1731
if client.approved or not client.approval_delay:
1263
if client._approved or not client.approval_delay:
1732
1264
#We are approved or approval is disabled
1733
1265
break
1734
elif client.approved is None:
1266
elif client._approved is None:
1735
1267
logger.info("Client %s needs approval",
1736
1268
client.name)
1737
1269
if self.server.use_dbus:
1738
1270
# Emit D-Bus signal
1739
1271
client.NeedApproval(
1740
client.approval_delay.total_seconds()
1741
* 1000, client.approved_by_default)
1272
client.approval_delay_milliseconds(),
1273
client.approved_by_default)
1742
1274
else:
1743
1275
logger.warning("Client %s was not approved",
1744
1276
client.name)
1748
1280
return
1749
1281
1750
1282
#wait until timeout or approved
1283
#x = float(client._timedelta_to_milliseconds(delay))
1751
1284
time = datetime.datetime.now()
1752
1285
client.changedstate.acquire()
1753
client.changedstate.wait(delay.total_seconds())
1286
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1754
1287
client.changedstate.release()
1755
1288
time2 = datetime.datetime.now()
1756
1289
if (time2 - time) >= delay:
1772
1305
try:
1773
1306
sent = session.send(client.secret[sent_size:])
1774
1307
except gnutls.errors.GNUTLSError as error:
1775
logger.warning("gnutls send failed",
1776
exc_info=error)
1308
logger.warning("gnutls send failed")
1777
1309
return
1778
1310
logger.debug("Sent: %d, remaining: %d",
1779
1311
sent, len(client.secret)
1780
1312
- (sent_size + sent))
1781
1313
sent_size += sent
1782
1314
1783
1315
logger.info("Sending secret to %s", client.name)
1784
# bump the timeout using extended_timeout
1785
client.bump_timeout(client.extended_timeout)
1316
# bump the timeout as if seen
1317
client.checked_ok(client.extended_timeout)
1786
1318
if self.server.use_dbus:
1787
1319
# Emit D-Bus signal
1788
1320
client.GotSecret()
1793
1325
try:
1794
1326
session.bye()
1795
1327
except gnutls.errors.GNUTLSError as error:
1796
logger.warning("GnuTLS bye failed",
1797
exc_info=error)
1328
logger.warning("GnuTLS bye failed")
1798
1329
1799
1330
@staticmethod
1800
1331
def peer_certificate(session):
1856
1387
# Convert the buffer to a Python bytestring
1857
1388
fpr = ctypes.string_at(buf, buf_len.value)
1858
1389
# Convert the bytestring to hexadecimal notation
1859
hex_fpr = binascii.hexlify(fpr).upper()
1390
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1860
1391
return hex_fpr
1861
1392
1862
1393
1865
1396
def sub_process_main(self, request, address):
1866
1397
try:
1867
1398
self.finish_request(request, address)
1868
except Exception:
1399
except:
1869
1400
self.handle_error(request, address)
1870
1401
self.close_request(request)
1871
1402
1872
1403
def process_request(self, request, address):
1873
1404
"""Start a new process to process the request."""
1874
proc = multiprocessing.Process(target = self.sub_process_main,
1875
args = (request, address))
1876
proc.start()
1877
return proc
1878
1405
multiprocessing.Process(target = self.sub_process_main,
1406
args = (request, address)).start()
1879
1407
1880
1408
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1881
1409
""" adds a pipe to the MixIn """
1885
1413
This function creates a new pipe in self.pipe
1886
1414
"""
1887
1415
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1888
1889
proc = MultiprocessingMixIn.process_request(self, request,
1890
client_address)
1416
1417
super(MultiprocessingMixInWithPipe,
1418
self).process_request(request, client_address)
1891
1419
self.child_pipe.close()
1892
self.add_pipe(parent_pipe, proc)
1893
1894
def add_pipe(self, parent_pipe, proc):
1420
self.add_pipe(parent_pipe)
1421
1422
def add_pipe(self, parent_pipe):
1895
1423
"""Dummy function; override as necessary"""
1896
raise NotImplementedError()
1897
1424
raise NotImplementedError
1898
1425
1899
1426
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1900
1427
socketserver.TCPServer, object):
1906
1433
use_ipv6: Boolean; to use IPv6 or not
1907
1434
"""
1908
1435
def __init__(self, server_address, RequestHandlerClass,
1909
interface=None, use_ipv6=True, socketfd=None):
1910
"""If socketfd is set, use that file descriptor instead of
1911
creating a new one with socket.socket().
1912
"""
1436
interface=None, use_ipv6=True):
1913
1437
self.interface = interface
1914
1438
if use_ipv6:
1915
1439
self.address_family = socket.AF_INET6
1916
if socketfd is not None:
1917
# Save the file descriptor
1918
self.socketfd = socketfd
1919
# Save the original socket.socket() function
1920
self.socket_socket = socket.socket
1921
# To implement --socket, we monkey patch socket.socket.
1922
#
1923
# (When socketserver.TCPServer is a new-style class, we
1924
# could make self.socket into a property instead of monkey
1925
# patching socket.socket.)
1926
#
1927
# Create a one-time-only replacement for socket.socket()
1928
@functools.wraps(socket.socket)
1929
def socket_wrapper(*args, **kwargs):
1930
# Restore original function so subsequent calls are
1931
# not affected.
1932
socket.socket = self.socket_socket
1933
del self.socket_socket
1934
# This time only, return a new socket object from the
1935
# saved file descriptor.
1936
return socket.fromfd(self.socketfd, *args, **kwargs)
1937
# Replace socket.socket() function with wrapper
1938
socket.socket = socket_wrapper
1939
# The socketserver.TCPServer.__init__ will call
1940
# socket.socket(), which might be our replacement,
1941
# socket_wrapper(), if socketfd was set.
1942
1440
socketserver.TCPServer.__init__(self, server_address,
1943
1441
RequestHandlerClass)
1944
1945
1442
def server_bind(self):
1946
1443
"""This overrides the normal server_bind() function
1947
1444
to bind to an interface if one was specified, and also NOT to
1955
1452
try:
1956
1453
self.socket.setsockopt(socket.SOL_SOCKET,
1957
1454
SO_BINDTODEVICE,
1958
(self.interface + "\0")
1959
.encode("utf-8"))
1455
str(self.interface
1456
+ '\0'))
1960
1457
except socket.error as error:
1961
if error.errno == errno.EPERM:
1962
logger.error("No permission to bind to"
1963
" interface %s", self.interface)
1964
elif error.errno == errno.ENOPROTOOPT:
1458
if error[0] == errno.EPERM:
1459
logger.error("No permission to"
1460
" bind to interface %s",
1461
self.interface)
1462
elif error[0] == errno.ENOPROTOOPT:
1965
1463
logger.error("SO_BINDTODEVICE not available;"
1966
1464
" cannot bind to interface %s",
1967
1465
self.interface)
1968
elif error.errno == errno.ENODEV:
1969
logger.error("Interface %s does not exist,"
1970
" cannot bind", self.interface)
1971
1466
else:
1972
1467
raise
1973
1468
# Only bind(2) the socket if we really need to.
1976
1471
if self.address_family == socket.AF_INET6:
1977
1472
any_address = "::" # in6addr_any
1978
1473
else:
1979
any_address = "0.0.0.0" # INADDR_ANY
1474
any_address = socket.INADDR_ANY
1980
1475
self.server_address = (any_address,
1981
1476
self.server_address[1])
1982
1477
elif not self.server_address[1]:
2003
1498
"""
2004
1499
def __init__(self, server_address, RequestHandlerClass,
2005
1500
interface=None, use_ipv6=True, clients=None,
2006
gnutls_priority=None, use_dbus=True, socketfd=None):
1501
gnutls_priority=None, use_dbus=True):
2007
1502
self.enabled = False
2008
1503
self.clients = clients
2009
1504
if self.clients is None:
2010
self.clients = {}
1505
self.clients = set()
2011
1506
self.use_dbus = use_dbus
2012
1507
self.gnutls_priority = gnutls_priority
2013
1508
IPv6_TCPServer.__init__(self, server_address,
2014
1509
RequestHandlerClass,
2015
1510
interface = interface,
2016
use_ipv6 = use_ipv6,
2017
socketfd = socketfd)
1511
use_ipv6 = use_ipv6)
2018
1512
def server_activate(self):
2019
1513
if self.enabled:
2020
1514
return socketserver.TCPServer.server_activate(self)
2021
2022
1515
def enable(self):
2023
1516
self.enabled = True
2024
2025
def add_pipe(self, parent_pipe, proc):
1517
def add_pipe(self, parent_pipe):
2026
1518
# Call "handle_ipc" for both data and EOF events
2027
1519
gobject.io_add_watch(parent_pipe.fileno(),
2028
1520
gobject.IO_IN | gobject.IO_HUP,
2029
1521
functools.partial(self.handle_ipc,
2030
parent_pipe =
2031
parent_pipe,
2032
proc = proc))
2033
1522
parent_pipe = parent_pipe))
1523
2034
1524
def handle_ipc(self, source, condition, parent_pipe=None,
2035
proc = None, client_object=None):
2036
# error, or the other end of multiprocessing.Pipe has closed
2037
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2038
# Wait for other process to exit
2039
proc.join()
1525
client_object=None):
1526
condition_names = {
1527
gobject.IO_IN: "IN", # There is data to read.
1528
gobject.IO_OUT: "OUT", # Data can be written (without
1529
# blocking).
1530
gobject.IO_PRI: "PRI", # There is urgent data to read.
1531
gobject.IO_ERR: "ERR", # Error condition.
1532
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1533
# broken, usually for pipes and
1534
# sockets).
1535
}
1536
conditions_string = ' | '.join(name
1537
for cond, name in
1538
condition_names.iteritems()
1539
if cond & condition)
1540
# error or the other end of multiprocessing.Pipe has closed
1541
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2040
1542
return False
2041
1543
2042
1544
# Read a request from the child
2047
1549
fpr = request[1]
2048
1550
address = request[2]
2049
1551
2050
for c in self.clients.itervalues():
1552
for c in self.clients:
2051
1553
if c.fingerprint == fpr:
2052
1554
client = c
2053
1555
break
2056
1558
"dress: %s", fpr, address)
2057
1559
if self.use_dbus:
2058
1560
# Emit D-Bus signal
2059
mandos_dbus_service.ClientNotFound(fpr,
2060
address[0])
1561
mandos_dbus_service.ClientNotFound(fpr, address[0])
2061
1562
parent_pipe.send(False)
2062
1563
return False
2063
1564
2064
1565
gobject.io_add_watch(parent_pipe.fileno(),
2065
1566
gobject.IO_IN | gobject.IO_HUP,
2066
1567
functools.partial(self.handle_ipc,
2067
parent_pipe =
2068
parent_pipe,
2069
proc = proc,
2070
client_object =
2071
client))
1568
parent_pipe = parent_pipe,
1569
client_object = client))
2072
1570
parent_pipe.send(True)
2073
# remove the old hook in favor of the new above hook on
2074
# same fileno
1571
# remove the old hook in favor of the new above hook on same fileno
2075
1572
return False
2076
1573
if command == 'funcall':
2077
1574
funcname = request[1]
2078
1575
args = request[2]
2079
1576
kwargs = request[3]
2080
1577
2081
parent_pipe.send(('data', getattr(client_object,
2082
funcname)(*args,
2083
**kwargs)))
2084
1578
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1579
2085
1580
if command == 'getattr':
2086
1581
attrname = request[1]
2087
1582
if callable(client_object.__getattribute__(attrname)):
2088
1583
parent_pipe.send(('function',))
2089
1584
else:
2090
parent_pipe.send(('data', client_object
2091
.__getattribute__(attrname)))
1585
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2092
1586
2093
1587
if command == 'setattr':
2094
1588
attrname = request[1]
2095
1589
value = request[2]
2096
1590
setattr(client_object, attrname, value)
2097
1591
2098
1592
return True
2099
1593
2100
1594
2101
def rfc3339_duration_to_delta(duration):
2102
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2103
2104
>>> rfc3339_duration_to_delta("P7D")
2105
datetime.timedelta(7)
2106
>>> rfc3339_duration_to_delta("PT60S")
2107
datetime.timedelta(0, 60)
2108
>>> rfc3339_duration_to_delta("PT60M")
2109
datetime.timedelta(0, 3600)
2110
>>> rfc3339_duration_to_delta("PT24H")
2111
datetime.timedelta(1)
2112
>>> rfc3339_duration_to_delta("P1W")
2113
datetime.timedelta(7)
2114
>>> rfc3339_duration_to_delta("PT5M30S")
2115
datetime.timedelta(0, 330)
2116
>>> rfc3339_duration_to_delta("P1DT3M20S")
2117
datetime.timedelta(1, 200)
2118
"""
2119
2120
# Parsing an RFC 3339 duration with regular expressions is not
2121
# possible - there would have to be multiple places for the same
2122
# values, like seconds. The current code, while more esoteric, is
2123
# cleaner without depending on a parsing library. If Python had a
2124
# built-in library for parsing we would use it, but we'd like to
2125
# avoid excessive use of external libraries.
2126
2127
# New type for defining tokens, syntax, and semantics all-in-one
2128
Token = collections.namedtuple("Token",
2129
("regexp", # To match token; if
2130
# "value" is not None,
2131
# must have a "group"
2132
# containing digits
2133
"value", # datetime.timedelta or
2134
# None
2135
"followers")) # Tokens valid after
2136
# this token
2137
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2138
# the "duration" ABNF definition in RFC 3339, Appendix A.
2139
token_end = Token(re.compile(r"$"), None, frozenset())
2140
token_second = Token(re.compile(r"(\d+)S"),
2141
datetime.timedelta(seconds=1),
2142
frozenset((token_end,)))
2143
token_minute = Token(re.compile(r"(\d+)M"),
2144
datetime.timedelta(minutes=1),
2145
frozenset((token_second, token_end)))
2146
token_hour = Token(re.compile(r"(\d+)H"),
2147
datetime.timedelta(hours=1),
2148
frozenset((token_minute, token_end)))
2149
token_time = Token(re.compile(r"T"),
2150
None,
2151
frozenset((token_hour, token_minute,
2152
token_second)))
2153
token_day = Token(re.compile(r"(\d+)D"),
2154
datetime.timedelta(days=1),
2155
frozenset((token_time, token_end)))
2156
token_month = Token(re.compile(r"(\d+)M"),
2157
datetime.timedelta(weeks=4),
2158
frozenset((token_day, token_end)))
2159
token_year = Token(re.compile(r"(\d+)Y"),
2160
datetime.timedelta(weeks=52),
2161
frozenset((token_month, token_end)))
2162
token_week = Token(re.compile(r"(\d+)W"),
2163
datetime.timedelta(weeks=1),
2164
frozenset((token_end,)))
2165
token_duration = Token(re.compile(r"P"), None,
2166
frozenset((token_year, token_month,
2167
token_day, token_time,
2168
token_week)))
2169
# Define starting values
2170
value = datetime.timedelta() # Value so far
2171
found_token = None
2172
followers = frozenset((token_duration,)) # Following valid tokens
2173
s = duration # String left to parse
2174
# Loop until end token is found
2175
while found_token is not token_end:
2176
# Search for any currently valid tokens
2177
for token in followers:
2178
match = token.regexp.match(s)
2179
if match is not None:
2180
# Token found
2181
if token.value is not None:
2182
# Value found, parse digits
2183
factor = int(match.group(1), 10)
2184
# Add to value so far
2185
value += factor * token.value
2186
# Strip token from string
2187
s = token.regexp.sub("", s, 1)
2188
# Go to found token
2189
found_token = token
2190
# Set valid next tokens
2191
followers = found_token.followers
2192
break
2193
else:
2194
# No currently valid tokens were found
2195
raise ValueError("Invalid RFC 3339 duration")
2196
# End token found
2197
return value
2198
2199
2200
1595
def string_to_delta(interval):
2201
1596
"""Parse a string and return a datetime.timedelta
2202
1597
2213
1608
>>> string_to_delta('5m 30s')
2214
1609
datetime.timedelta(0, 330)
2215
1610
"""
2216
2217
try:
2218
return rfc3339_duration_to_delta(interval)
2219
except ValueError:
2220
pass
2221
2222
1611
timevalue = datetime.timedelta(0)
2223
1612
for s in interval.split():
2224
1613
try:
2225
suffix = s[-1]
1614
suffix = unicode(s[-1])
2226
1615
value = int(s[:-1])
2227
1616
if suffix == "d":
2228
1617
delta = datetime.timedelta(value)
2235
1624
elif suffix == "w":
2236
1625
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2237
1626
else:
2238
raise ValueError("Unknown suffix {!r}"
2239
.format(suffix))
2240
except IndexError as e:
1627
raise ValueError("Unknown suffix %r" % suffix)
1628
except (ValueError, IndexError) as e:
2241
1629
raise ValueError(*(e.args))
2242
1630
timevalue += delta
2243
1631
return timevalue
2244
1632
2245
1633
1634
def if_nametoindex(interface):
1635
"""Call the C function if_nametoindex(), or equivalent
1636
1637
Note: This function cannot accept a unicode string."""
1638
global if_nametoindex
1639
try:
1640
if_nametoindex = (ctypes.cdll.LoadLibrary
1641
(ctypes.util.find_library("c"))
1642
.if_nametoindex)
1643
except (OSError, AttributeError):
1644
logger.warning("Doing if_nametoindex the hard way")
1645
def if_nametoindex(interface):
1646
"Get an interface index the hard way, i.e. using fcntl()"
1647
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1648
with contextlib.closing(socket.socket()) as s:
1649
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1650
struct.pack(str("16s16x"),
1651
interface))
1652
interface_index = struct.unpack(str("I"),
1653
ifreq[16:20])[0]
1654
return interface_index
1655
return if_nametoindex(interface)
1656
1657
2246
1658
def daemon(nochdir = False, noclose = False):
2247
1659
"""See daemon(3). Standard BSD Unix function.
2248
1660
2256
1668
sys.exit()
2257
1669
if not noclose:
2258
1670
# Close all standard open file descriptors
2259
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1671
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2260
1672
if not stat.S_ISCHR(os.fstat(null).st_mode):
2261
raise OSError(errno.ENODEV, "{} not a character device"
2262
.format(os.devnull))
1673
raise OSError(errno.ENODEV,
1674
"%s not a character device"
1675
% os.path.devnull)
2263
1676
os.dup2(null, sys.stdin.fileno())
2264
1677
os.dup2(null, sys.stdout.fileno())
2265
1678
os.dup2(null, sys.stderr.fileno())
2274
1687
2275
1688
parser = argparse.ArgumentParser()
2276
1689
parser.add_argument("-v", "--version", action="version",
2277
version = "%(prog)s {}".format(version),
1690
version = "%%(prog)s %s" % version,
2278
1691
help="show version number and exit")
2279
1692
parser.add_argument("-i", "--interface", metavar="IF",
2280
1693
help="Bind to interface IF")
2286
1699
help="Run self-test")
2287
1700
parser.add_argument("--debug", action="store_true",
2288
1701
help="Debug mode; run in foreground and log"
2289
" to terminal", default=None)
1702
" to terminal")
2290
1703
parser.add_argument("--debuglevel", metavar="LEVEL",
2291
1704
help="Debug level for stdout output")
2292
1705
parser.add_argument("--priority", help="GnuTLS"
2299
1712
" files")
2300
1713
parser.add_argument("--no-dbus", action="store_false",
2301
1714
dest="use_dbus", help="Do not provide D-Bus"
2302
" system bus interface", default=None)
1715
" system bus interface")
2303
1716
parser.add_argument("--no-ipv6", action="store_false",
2304
dest="use_ipv6", help="Do not use IPv6",
2305
default=None)
2306
parser.add_argument("--no-restore", action="store_false",
2307
dest="restore", help="Do not restore stored"
2308
" state", default=None)
2309
parser.add_argument("--socket", type=int,
2310
help="Specify a file descriptor to a network"
2311
" socket to use instead of creating one")
2312
parser.add_argument("--statedir", metavar="DIR",
2313
help="Directory to save/restore state in")
2314
parser.add_argument("--foreground", action="store_true",
2315
help="Run in foreground", default=None)
2316
parser.add_argument("--no-zeroconf", action="store_false",
2317
dest="zeroconf", help="Do not use Zeroconf",
2318
default=None)
2319
1717
dest="use_ipv6", help="Do not use IPv6")
2320
1718
options = parser.parse_args()
2321
1719
2322
1720
if options.check:
2323
1721
import doctest
2324
fail_count, test_count = doctest.testmod()
2325
sys.exit(os.EX_OK if fail_count == 0 else 1)
1722
doctest.testmod()
1723
sys.exit()
2326
1724
2327
1725
# Default values for config file for server-global settings
2328
1726
server_defaults = { "interface": "",
2330
1728
"port": "",
2331
1729
"debug": "False",
2332
1730
"priority":
2333
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1731
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2334
1732
"servicename": "Mandos",
2335
1733
"use_dbus": "True",
2336
1734
"use_ipv6": "True",
2337
1735
"debuglevel": "",
2338
"restore": "True",
2339
"socket": "",
2340
"statedir": "/var/lib/mandos",
2341
"foreground": "False",
2342
"zeroconf": "True",
2343
1736
}
2344
1737
2345
1738
# Parse config file for server-global settings
2350
1743
# Convert the SafeConfigParser object to a dict
2351
1744
server_settings = server_config.defaults()
2352
1745
# Use the appropriate methods on the non-string config options
2353
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1746
for option in ("debug", "use_dbus", "use_ipv6"):
2354
1747
server_settings[option] = server_config.getboolean("DEFAULT",
2355
1748
option)
2356
1749
if server_settings["port"]:
2357
1750
server_settings["port"] = server_config.getint("DEFAULT",
2358
1751
"port")
2359
if server_settings["socket"]:
2360
server_settings["socket"] = server_config.getint("DEFAULT",
2361
"socket")
2362
# Later, stdin will, and stdout and stderr might, be dup'ed
2363
# over with an opened os.devnull. But we don't want this to
2364
# happen with a supplied network socket.
2365
if 0 <= server_settings["socket"] <= 2:
2366
server_settings["socket"] = os.dup(server_settings
2367
["socket"])
2368
1752
del server_config
2369
1753
2370
1754
# Override the settings from the config file with command line
2371
1755
# options, if set.
2372
1756
for option in ("interface", "address", "port", "debug",
2373
1757
"priority", "servicename", "configdir",
2374
"use_dbus", "use_ipv6", "debuglevel", "restore",
2375
"statedir", "socket", "foreground", "zeroconf"):
1758
"use_dbus", "use_ipv6", "debuglevel"):
2376
1759
value = getattr(options, option)
2377
1760
if value is not None:
2378
1761
server_settings[option] = value
2379
1762
del options
2380
1763
# Force all strings to be unicode
2381
1764
for option in server_settings.keys():
2382
if isinstance(server_settings[option], bytes):
2383
server_settings[option] = (server_settings[option]
2384
.decode("utf-8"))
2385
# Force all boolean options to be boolean
2386
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2387
"foreground", "zeroconf"):
2388
server_settings[option] = bool(server_settings[option])
2389
# Debug implies foreground
2390
if server_settings["debug"]:
2391
server_settings["foreground"] = True
1765
if type(server_settings[option]) is str:
1766
server_settings[option] = unicode(server_settings[option])
2392
1767
# Now we have our good server settings in "server_settings"
2393
1768
2394
1769
##################################################################
2395
1770
2396
if (not server_settings["zeroconf"] and
2397
not (server_settings["port"]
2398
or server_settings["socket"] != "")):
2399
parser.error("Needs port or socket to work without"
2400
" Zeroconf")
2401
2402
1771
# For convenience
2403
1772
debug = server_settings["debug"]
2404
1773
debuglevel = server_settings["debuglevel"]
2405
1774
use_dbus = server_settings["use_dbus"]
2406
1775
use_ipv6 = server_settings["use_ipv6"]
2407
stored_state_path = os.path.join(server_settings["statedir"],
2408
stored_state_file)
2409
foreground = server_settings["foreground"]
2410
zeroconf = server_settings["zeroconf"]
2411
2412
if debug:
2413
initlogger(debug, logging.DEBUG)
2414
else:
2415
if not debuglevel:
2416
initlogger(debug)
2417
else:
2418
level = getattr(logging, debuglevel.upper())
2419
initlogger(debug, level)
2420
1776
2421
1777
if server_settings["servicename"] != "Mandos":
2422
1778
syslogger.setFormatter(logging.Formatter
2423
('Mandos ({}) [%(process)d]:'
2424
' %(levelname)s: %(message)s'
2425
.format(server_settings
2426
["servicename"])))
1779
('Mandos (%s) [%%(process)d]:'
1780
' %%(levelname)s: %%(message)s'
1781
% server_settings["servicename"]))
2427
1782
2428
1783
# Parse config file with clients
2429
client_config = configparser.SafeConfigParser(Client
2430
.client_defaults)
1784
client_defaults = { "timeout": "5m",
1785
"extended_timeout": "15m",
1786
"interval": "2m",
1787
"checker": "fping -q -- %%(host)s",
1788
"host": "",
1789
"approval_delay": "0s",
1790
"approval_duration": "1s",
1791
}
1792
client_config = configparser.SafeConfigParser(client_defaults)
2431
1793
client_config.read(os.path.join(server_settings["configdir"],
2432
1794
"clients.conf"))
2433
1795
2434
1796
global mandos_dbus_service
2435
1797
mandos_dbus_service = None
2436
1798
2437
socketfd = None
2438
if server_settings["socket"] != "":
2439
socketfd = server_settings["socket"]
2440
1799
tcp_server = MandosServer((server_settings["address"],
2441
1800
server_settings["port"]),
2442
1801
ClientHandler,
2445
1804
use_ipv6=use_ipv6,
2446
1805
gnutls_priority=
2447
1806
server_settings["priority"],
2448
use_dbus=use_dbus,
2449
socketfd=socketfd)
2450
if not foreground:
2451
pidfilename = "/run/mandos.pid"
2452
if not os.path.isdir("/run/."):
2453
pidfilename = "/var/run/mandos.pid"
2454
pidfile = None
1807
use_dbus=use_dbus)
1808
if not debug:
1809
pidfilename = "/var/run/mandos.pid"
2455
1810
try:
2456
1811
pidfile = open(pidfilename, "w")
2457
except IOError as e:
2458
logger.error("Could not open file %r", pidfilename,
2459
exc_info=e)
1812
except IOError:
1813
logger.error("Could not open file %r", pidfilename)
2460
1814
2461
for name in ("_mandos", "mandos", "nobody"):
1815
try:
1816
uid = pwd.getpwnam("_mandos").pw_uid
1817
gid = pwd.getpwnam("_mandos").pw_gid
1818
except KeyError:
2462
1819
try:
2463
uid = pwd.getpwnam(name).pw_uid
2464
gid = pwd.getpwnam(name).pw_gid
2465
break
1820
uid = pwd.getpwnam("mandos").pw_uid
1821
gid = pwd.getpwnam("mandos").pw_gid
2466
1822
except KeyError:
2467
continue
2468
else:
2469
uid = 65534
2470
gid = 65534
1823
try:
1824
uid = pwd.getpwnam("nobody").pw_uid
1825
gid = pwd.getpwnam("nobody").pw_gid
1826
except KeyError:
1827
uid = 65534
1828
gid = 65534
2471
1829
try:
2472
1830
os.setgid(gid)
2473
1831
os.setuid(uid)
2474
1832
except OSError as error:
2475
if error.errno != errno.EPERM:
2476
raise
1833
if error[0] != errno.EPERM:
1834
raise error
2477
1835
1836
if not debug and not debuglevel:
1837
syslogger.setLevel(logging.WARNING)
1838
console.setLevel(logging.WARNING)
1839
if debuglevel:
1840
level = getattr(logging, debuglevel.upper())
1841
syslogger.setLevel(level)
1842
console.setLevel(level)
1843
2478
1844
if debug:
2479
1845
# Enable all possible GnuTLS debugging
2480
1846
2490
1856
.gnutls_global_set_log_function(debug_gnutls))
2491
1857
2492
1858
# Redirect stdin so all checkers get /dev/null
2493
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1859
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2494
1860
os.dup2(null, sys.stdin.fileno())
2495
1861
if null > 2:
2496
1862
os.close(null)
1863
else:
1864
# No console logging
1865
logger.removeHandler(console)
2497
1866
2498
1867
# Need to fork before connecting to D-Bus
2499
if not foreground:
1868
if not debug:
2500
1869
# Close all input and output, do double fork, etc.
2501
1870
daemon()
2502
1871
2503
# multiprocessing will use threads, so before we use gobject we
2504
# need to inform gobject that threads will be used.
2505
gobject.threads_init()
2506
2507
1872
global main_loop
2508
1873
# From the Avahi example code
2509
DBusGMainLoop(set_as_default=True)
1874
DBusGMainLoop(set_as_default=True )
2510
1875
main_loop = gobject.MainLoop()
2511
1876
bus = dbus.SystemBus()
2512
1877
# End of Avahi example code
2513
1878
if use_dbus:
2514
1879
try:
2515
bus_name = dbus.service.BusName("se.recompile.Mandos",
1880
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2516
1881
bus, do_not_queue=True)
2517
old_bus_name = (dbus.service.BusName
2518
("se.bsnet.fukt.Mandos", bus,
2519
do_not_queue=True))
2520
1882
except dbus.exceptions.NameExistsException as e:
2521
logger.error("Disabling D-Bus:", exc_info=e)
1883
logger.error(unicode(e) + ", disabling D-Bus")
2522
1884
use_dbus = False
2523
1885
server_settings["use_dbus"] = False
2524
1886
tcp_server.use_dbus = False
2525
if zeroconf:
2526
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2527
service = AvahiServiceToSyslog(name =
2528
server_settings["servicename"],
2529
servicetype = "_mandos._tcp",
2530
protocol = protocol, bus = bus)
2531
if server_settings["interface"]:
2532
service.interface = (if_nametoindex
2533
(server_settings["interface"]
2534
.encode("utf-8")))
1887
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1888
service = AvahiService(name = server_settings["servicename"],
1889
servicetype = "_mandos._tcp",
1890
protocol = protocol, bus = bus)
1891
if server_settings["interface"]:
1892
service.interface = (if_nametoindex
1893
(str(server_settings["interface"])))
2535
1894
2536
1895
global multiprocessing_manager
2537
1896
multiprocessing_manager = multiprocessing.Manager()
2539
1898
client_class = Client
2540
1899
if use_dbus:
2541
1900
client_class = functools.partial(ClientDBus, bus = bus)
2542
2543
client_settings = Client.config_parser(client_config)
2544
old_client_settings = {}
2545
clients_data = {}
2546
2547
# This is used to redirect stdout and stderr for checker processes
2548
global wnull
2549
wnull = open(os.devnull, "w") # A writable /dev/null
2550
# Only used if server is running in foreground but not in debug
2551
# mode
2552
if debug or not foreground:
2553
wnull.close()
2554
2555
# Get client data and settings from last running state.
2556
if server_settings["restore"]:
2557
try:
2558
with open(stored_state_path, "rb") as stored_state:
2559
clients_data, old_client_settings = (pickle.load
2560
(stored_state))
2561
os.remove(stored_state_path)
2562
except IOError as e:
2563
if e.errno == errno.ENOENT:
2564
logger.warning("Could not load persistent state: {}"
2565
.format(os.strerror(e.errno)))
2566
else:
2567
logger.critical("Could not load persistent state:",
2568
exc_info=e)
2569
raise
2570
except EOFError as e:
2571
logger.warning("Could not load persistent state: "
2572
"EOFError:", exc_info=e)
2573
2574
with PGPEngine() as pgp:
2575
for client_name, client in clients_data.items():
2576
# Skip removed clients
2577
if client_name not in client_settings:
2578
continue
2579
2580
# Decide which value to use after restoring saved state.
2581
# We have three different values: Old config file,
2582
# new config file, and saved state.
2583
# New config value takes precedence if it differs from old
2584
# config value, otherwise use saved state.
2585
for name, value in client_settings[client_name].items():
2586
try:
2587
# For each value in new config, check if it
2588
# differs from the old config value (Except for
2589
# the "secret" attribute)
2590
if (name != "secret" and
2591
value != old_client_settings[client_name]
2592
[name]):
2593
client[name] = value
2594
except KeyError:
2595
pass
2596
2597
# Clients who has passed its expire date can still be
2598
# enabled if its last checker was successful. Clients
2599
# whose checker succeeded before we stored its state is
2600
# assumed to have successfully run all checkers during
2601
# downtime.
2602
if client["enabled"]:
2603
if datetime.datetime.utcnow() >= client["expires"]:
2604
if not client["last_checked_ok"]:
2605
logger.warning(
2606
"disabling client {} - Client never "
2607
"performed a successful checker"
2608
.format(client_name))
2609
client["enabled"] = False
2610
elif client["last_checker_status"] != 0:
2611
logger.warning(
2612
"disabling client {} - Client last"
2613
" checker failed with error code {}"
2614
.format(client_name,
2615
client["last_checker_status"]))
2616
client["enabled"] = False
2617
else:
2618
client["expires"] = (datetime.datetime
2619
.utcnow()
2620
+ client["timeout"])
2621
logger.debug("Last checker succeeded,"
2622
" keeping {} enabled"
2623
.format(client_name))
1901
def client_config_items(config, section):
1902
special_settings = {
1903
"approved_by_default":
1904
lambda: config.getboolean(section,
1905
"approved_by_default"),
1906
}
1907
for name, value in config.items(section):
2624
1908
try:
2625
client["secret"] = (
2626
pgp.decrypt(client["encrypted_secret"],
2627
client_settings[client_name]
2628
["secret"]))
2629
except PGPError:
2630
# If decryption fails, we use secret from new settings
2631
logger.debug("Failed to decrypt {} old secret"
2632
.format(client_name))
2633
client["secret"] = (
2634
client_settings[client_name]["secret"])
2635
2636
# Add/remove clients based on new changes made to config
2637
for client_name in (set(old_client_settings)
2638
- set(client_settings)):
2639
del clients_data[client_name]
2640
for client_name in (set(client_settings)
2641
- set(old_client_settings)):
2642
clients_data[client_name] = client_settings[client_name]
2643
2644
# Create all client objects
2645
for client_name, client in clients_data.items():
2646
tcp_server.clients[client_name] = client_class(
2647
name = client_name, settings = client,
2648
server_settings = server_settings)
2649
1909
yield (name, special_settings[name]())
1910
except KeyError:
1911
yield (name, value)
1912
1913
tcp_server.clients.update(set(
1914
client_class(name = section,
1915
config= dict(client_config_items(
1916
client_config, section)))
1917
for section in client_config.sections()))
2650
1918
if not tcp_server.clients:
2651
1919
logger.warning("No clients defined")
2652
2653
if not foreground:
2654
if pidfile is not None:
2655
try:
2656
with pidfile:
2657
pid = os.getpid()
2658
pidfile.write("{}\n".format(pid).encode("utf-8"))
2659
except IOError:
2660
logger.error("Could not write to file %r with PID %d",
2661
pidfilename, pid)
2662
del pidfile
1920
1921
if not debug:
1922
try:
1923
with pidfile:
1924
pid = os.getpid()
1925
pidfile.write(str(pid) + "\n".encode("utf-8"))
1926
del pidfile
1927
except IOError:
1928
logger.error("Could not write to file %r with PID %d",
1929
pidfilename, pid)
1930
except NameError:
1931
# "pidfile" was never created
1932
pass
2663
1933
del pidfilename
2664
1934
1935
signal.signal(signal.SIGINT, signal.SIG_IGN)
1936
2665
1937
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2666
1938
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2667
1939
2668
1940
if use_dbus:
2669
@alternate_dbus_interfaces({"se.recompile.Mandos":
2670
"se.bsnet.fukt.Mandos"})
2671
class MandosDBusService(DBusObjectWithProperties):
1941
class MandosDBusService(dbus.service.Object):
2672
1942
"""A D-Bus proxy object"""
2673
1943
def __init__(self):
2674
1944
dbus.service.Object.__init__(self, bus, "/")
2675
_interface = "se.recompile.Mandos"
2676
2677
@dbus_interface_annotations(_interface)
2678
def _foo(self):
2679
return { "org.freedesktop.DBus.Property"
2680
".EmitsChangedSignal":
2681
"false"}
1945
_interface = "se.bsnet.fukt.Mandos"
2682
1946
2683
1947
@dbus.service.signal(_interface, signature="o")
2684
1948
def ClientAdded(self, objpath):
2699
1963
def GetAllClients(self):
2700
1964
"D-Bus method"
2701
1965
return dbus.Array(c.dbus_object_path
2702
for c in
2703
tcp_server.clients.itervalues())
1966
for c in tcp_server.clients)
2704
1967
2705
1968
@dbus.service.method(_interface,
2706
1969
out_signature="a{oa{sv}}")
2708
1971
"D-Bus method"
2709
1972
return dbus.Dictionary(
2710
1973
((c.dbus_object_path, c.GetAll(""))
2711
for c in tcp_server.clients.itervalues()),
1974
for c in tcp_server.clients),
2712
1975
signature="oa{sv}")
2713
1976
2714
1977
@dbus.service.method(_interface, in_signature="o")
2715
1978
def RemoveClient(self, object_path):
2716
1979
"D-Bus method"
2717
for c in tcp_server.clients.itervalues():
1980
for c in tcp_server.clients:
2718
1981
if c.dbus_object_path == object_path:
2719
del tcp_server.clients[c.name]
1982
tcp_server.clients.remove(c)
2720
1983
c.remove_from_connection()
2721
1984
# Don't signal anything except ClientRemoved
2722
1985
c.disable(quiet=True)
2731
1994
2732
1995
def cleanup():
2733
1996
"Cleanup function; run on exit"
2734
if zeroconf:
2735
service.cleanup()
2736
2737
multiprocessing.active_children()
2738
wnull.close()
2739
if not (tcp_server.clients or client_settings):
2740
return
2741
2742
# Store client before exiting. Secrets are encrypted with key
2743
# based on what config file has. If config file is
2744
# removed/edited, old secret will thus be unrecovable.
2745
clients = {}
2746
with PGPEngine() as pgp:
2747
for client in tcp_server.clients.itervalues():
2748
key = client_settings[client.name]["secret"]
2749
client.encrypted_secret = pgp.encrypt(client.secret,
2750
key)
2751
client_dict = {}
2752
2753
# A list of attributes that can not be pickled
2754
# + secret.
2755
exclude = { "bus", "changedstate", "secret",
2756
"checker", "server_settings" }
2757
for name, typ in (inspect.getmembers
2758
(dbus.service.Object)):
2759
exclude.add(name)
2760
2761
client_dict["encrypted_secret"] = (client
2762
.encrypted_secret)
2763
for attr in client.client_structure:
2764
if attr not in exclude:
2765
client_dict[attr] = getattr(client, attr)
2766
2767
clients[client.name] = client_dict
2768
del client_settings[client.name]["secret"]
2769
2770
try:
2771
with (tempfile.NamedTemporaryFile
2772
(mode='wb', suffix=".pickle", prefix='clients-',
2773
dir=os.path.dirname(stored_state_path),
2774
delete=False)) as stored_state:
2775
pickle.dump((clients, client_settings), stored_state)
2776
tempname=stored_state.name
2777
os.rename(tempname, stored_state_path)
2778
except (IOError, OSError) as e:
2779
if not debug:
2780
try:
2781
os.remove(tempname)
2782
except NameError:
2783
pass
2784
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2785
logger.warning("Could not save persistent state: {}"
2786
.format(os.strerror(e.errno)))
2787
else:
2788
logger.warning("Could not save persistent state:",
2789
exc_info=e)
2790
raise
2791
2792
# Delete all clients, and settings from config
1997
service.cleanup()
1998
2793
1999
while tcp_server.clients:
2794
name, client = tcp_server.clients.popitem()
2000
client = tcp_server.clients.pop()
2795
2001
if use_dbus:
2796
2002
client.remove_from_connection()
2003
client.disable_hook = None
2797
2004
# Don't signal anything except ClientRemoved
2798
2005
client.disable(quiet=True)
2799
2006
if use_dbus:
2800
2007
# Emit D-Bus signal
2801
mandos_dbus_service.ClientRemoved(client
2802
.dbus_object_path,
2008
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2803
2009
client.name)
2804
client_settings.clear()
2805
2010
2806
2011
atexit.register(cleanup)
2807
2012
2808
for client in tcp_server.clients.itervalues():
2013
for client in tcp_server.clients:
2809
2014
if use_dbus:
2810
2015
# Emit D-Bus signal
2811
2016
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2812
# Need to initiate checking of clients
2813
if client.enabled:
2814
client.init_checker()
2017
client.enable()
2815
2018
2816
2019
tcp_server.enable()
2817
2020
tcp_server.server_activate()
2818
2021
2819
2022
# Find out what port we got
2820
if zeroconf:
2821
service.port = tcp_server.socket.getsockname()[1]
2023
service.port = tcp_server.socket.getsockname()[1]
2822
2024
if use_ipv6:
2823
2025
logger.info("Now listening on address %r, port %d,"
2824
" flowinfo %d, scope_id %d",
2825
*tcp_server.socket.getsockname())
2026
" flowinfo %d, scope_id %d"
2027
% tcp_server.socket.getsockname())
2826
2028
else: # IPv4
2827
logger.info("Now listening on address %r, port %d",
2828
*tcp_server.socket.getsockname())
2029
logger.info("Now listening on address %r, port %d"
2030
% tcp_server.socket.getsockname())
2829
2031
2830
2032
#service.interface = tcp_server.socket.getsockname()[3]
2831
2033
2832
2034
try:
2833
if zeroconf:
2834
# From the Avahi example code
2835
try:
2836
service.activate()
2837
except dbus.exceptions.DBusException as error:
2838
logger.critical("D-Bus Exception", exc_info=error)
2839
cleanup()
2840
sys.exit(1)
2841
# End of Avahi example code
2035
# From the Avahi example code
2036
try:
2037
service.activate()
2038
except dbus.exceptions.DBusException as error:
2039
logger.critical("DBusException: %s", error)
2040
cleanup()
2041
sys.exit(1)
2042
# End of Avahi example code
2842
2043
2843
2044
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2844
2045
lambda *args, **kwargs:
2848
2049
logger.debug("Starting main loop")
2849
2050
main_loop.run()
2850
2051
except AvahiError as error:
2851
logger.critical("Avahi Error", exc_info=error)
2052
logger.critical("AvahiError: %s", error)
2852
2053
cleanup()
2853
2054
sys.exit(1)
2854
2055
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0