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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.
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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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from __future__ import (division, absolute_import, print_function,
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unicode_literals)
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36
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from future_builtins import *
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import SocketServer as socketserver
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import socket
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import argparse
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import functools
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import cPickle as pickle
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import multiprocessing
67
import types
68
import binascii
69
import tempfile
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import itertools
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import collections
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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
if sys.version_info.major == 2:
92
str = unicode
93
94
version = "1.6.8"
95
stored_state_file = "clients.pickle"
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97
logger = logging.getLogger()
98
syslogger = None
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100
try:
101
if_nametoindex = (ctypes.cdll.LoadLibrary
102
(ctypes.util.find_library("c"))
103
.if_nametoindex)
104
except (OSError, AttributeError):
105
def if_nametoindex(interface):
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"Get an interface index the hard way, i.e. using fcntl()"
107
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
108
with contextlib.closing(socket.socket()) as s:
109
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
110
struct.pack(b"16s16x", interface))
111
interface_index = struct.unpack("I", ifreq[16:20])[0]
112
return interface_index
113
114
115
def initlogger(debug, level=logging.WARNING):
116
"""init logger and add loglevel"""
117
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global syslogger
119
syslogger = (logging.handlers.SysLogHandler
120
(facility =
121
logging.handlers.SysLogHandler.LOG_DAEMON,
122
address = "/dev/log"))
123
syslogger.setFormatter(logging.Formatter
124
('Mandos [%(process)d]: %(levelname)s:'
125
' %(message)s'))
126
logger.addHandler(syslogger)
127
128
if debug:
129
console = logging.StreamHandler()
130
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
131
' [%(process)d]:'
132
' %(levelname)s:'
133
' %(message)s'))
134
logger.addHandler(console)
135
logger.setLevel(level)
136
137
138
class PGPError(Exception):
139
"""Exception if encryption/decryption fails"""
140
pass
141
142
143
class PGPEngine(object):
144
"""A simple class for OpenPGP symmetric encryption & decryption"""
145
def __init__(self):
146
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
147
self.gnupgargs = ['--batch',
148
'--home', self.tempdir,
149
'--force-mdc',
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'--quiet',
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'--no-use-agent']
152
153
def __enter__(self):
154
return self
155
156
def __exit__(self, exc_type, exc_value, traceback):
157
self._cleanup()
158
return False
159
160
def __del__(self):
161
self._cleanup()
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def _cleanup(self):
164
if self.tempdir is not None:
165
# Delete contents of tempdir
166
for root, dirs, files in os.walk(self.tempdir,
167
topdown = False):
168
for filename in files:
169
os.remove(os.path.join(root, filename))
170
for dirname in dirs:
171
os.rmdir(os.path.join(root, dirname))
172
# Remove tempdir
173
os.rmdir(self.tempdir)
174
self.tempdir = None
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def password_encode(self, password):
177
# Passphrase can not be empty and can not contain newlines or
178
# NUL bytes. So we prefix it and hex encode it.
179
encoded = b"mandos" + binascii.hexlify(password)
180
if len(encoded) > 2048:
181
# GnuPG can't handle long passwords, so encode differently
182
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
183
.replace(b"\n", b"\\n")
184
.replace(b"\0", b"\\x00"))
185
return encoded
186
187
def encrypt(self, data, password):
188
passphrase = self.password_encode(password)
189
with tempfile.NamedTemporaryFile(dir=self.tempdir
190
) as passfile:
191
passfile.write(passphrase)
192
passfile.flush()
193
proc = subprocess.Popen(['gpg', '--symmetric',
194
'--passphrase-file',
195
passfile.name]
196
+ self.gnupgargs,
197
stdin = subprocess.PIPE,
198
stdout = subprocess.PIPE,
199
stderr = subprocess.PIPE)
200
ciphertext, err = proc.communicate(input = data)
201
if proc.returncode != 0:
202
raise PGPError(err)
203
return ciphertext
204
205
def decrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(dir = self.tempdir
208
) as passfile:
209
passfile.write(passphrase)
210
passfile.flush()
211
proc = subprocess.Popen(['gpg', '--decrypt',
212
'--passphrase-file',
213
passfile.name]
214
+ self.gnupgargs,
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
decrypted_plaintext, err = proc.communicate(input
219
= data)
220
if proc.returncode != 0:
221
raise PGPError(err)
222
return decrypted_plaintext
223
84
85
version = "1.3.1"
86
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#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'))
95
logger.addHandler(syslogger)
96
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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)
224
102
225
103
class AvahiError(Exception):
226
104
def __init__(self, value, *args, **kwargs):
227
105
self.value = value
228
return super(AvahiError, self).__init__(value, *args,
229
**kwargs)
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
230
109
231
110
class AvahiServiceError(AvahiError):
232
111
pass
243
122
Used to optionally bind to the specified interface.
244
123
name: string; Example: 'Mandos'
245
124
type: string; Example: '_mandos._tcp'.
246
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
247
126
port: integer; what port to announce
248
127
TXT: list of strings; TXT record for the service
249
128
domain: string; Domain to publish on, default to .local if empty.
255
134
server: D-Bus Server
256
135
bus: dbus.SystemBus()
257
136
"""
258
259
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
260
138
servicetype = None, port = None, TXT = None,
261
139
domain = "", host = "", max_renames = 32768,
274
152
self.server = None
275
153
self.bus = bus
276
154
self.entry_group_state_changed_match = None
277
278
155
def rename(self):
279
156
"""Derived from the Avahi example code"""
280
157
if self.rename_count >= self.max_renames:
282
159
" after %i retries, exiting.",
283
160
self.rename_count)
284
161
raise AvahiServiceError("Too many renames")
285
self.name = str(self.server
286
.GetAlternativeServiceName(self.name))
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
287
163
logger.info("Changing Zeroconf service name to %r ...",
288
164
self.name)
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
289
169
self.remove()
290
170
try:
291
171
self.add()
292
172
except dbus.exceptions.DBusException as error:
293
logger.critical("D-Bus Exception", exc_info=error)
173
logger.critical("DBusException: %s", error)
294
174
self.cleanup()
295
175
os._exit(1)
296
176
self.rename_count += 1
297
298
177
def remove(self):
299
178
"""Derived from the Avahi example code"""
300
179
if self.entry_group_state_changed_match is not None:
302
181
self.entry_group_state_changed_match = None
303
182
if self.group is not None:
304
183
self.group.Reset()
305
306
184
def add(self):
307
185
"""Derived from the Avahi example code"""
308
186
self.remove()
313
191
avahi.DBUS_INTERFACE_ENTRY_GROUP)
314
192
self.entry_group_state_changed_match = (
315
193
self.group.connect_to_signal(
316
'StateChanged', self.entry_group_state_changed))
194
'StateChanged', self .entry_group_state_changed))
317
195
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
318
196
self.name, self.type)
319
197
self.group.AddService(
325
203
dbus.UInt16(self.port),
326
204
avahi.string_array_to_txt_array(self.TXT))
327
205
self.group.Commit()
328
329
206
def entry_group_state_changed(self, state, error):
330
207
"""Derived from the Avahi example code"""
331
208
logger.debug("Avahi entry group state change: %i", state)
337
214
self.rename()
338
215
elif state == avahi.ENTRY_GROUP_FAILURE:
339
216
logger.critical("Avahi: Error in group state changed %s",
340
str(error))
341
raise AvahiGroupError("State changed: {!s}"
342
.format(error))
343
217
unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
344
220
def cleanup(self):
345
221
"""Derived from the Avahi example code"""
346
222
if self.group is not None:
347
223
try:
348
224
self.group.Free()
349
225
except (dbus.exceptions.UnknownMethodException,
350
dbus.exceptions.DBusException):
226
dbus.exceptions.DBusException) as e:
351
227
pass
352
228
self.group = None
353
229
self.remove()
354
355
230
def server_state_changed(self, state, error=None):
356
231
"""Derived from the Avahi example code"""
357
232
logger.debug("Avahi server state change: %i", state)
376
251
logger.debug("Unknown state: %r", state)
377
252
else:
378
253
logger.debug("Unknown state: %r: %r", state, error)
379
380
254
def activate(self):
381
255
"""Derived from the Avahi example code"""
382
256
if self.server is None:
390
264
self.server_state_changed(self.server.GetState())
391
265
392
266
393
class AvahiServiceToSyslog(AvahiService):
394
def rename(self):
395
"""Add the new name to the syslog messages"""
396
ret = AvahiService.rename(self)
397
syslogger.setFormatter(logging.Formatter
398
('Mandos ({}) [%(process)d]:'
399
' %(levelname)s: %(message)s'
400
.format(self.name)))
401
return ret
402
403
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
404
273
class Client(object):
405
274
"""A representation of a client host served by this server.
406
275
407
276
Attributes:
408
approved: bool(); 'None' if not yet approved/disapproved
277
_approved: bool(); 'None' if not yet approved/disapproved
409
278
approval_delay: datetime.timedelta(); Time to wait for approval
410
279
approval_duration: datetime.timedelta(); Duration of one approval
411
280
checker: subprocess.Popen(); a running checker process used
418
287
instance %(name)s can be used in the command.
419
288
checker_initiator_tag: a gobject event source tag, or None
420
289
created: datetime.datetime(); (UTC) object creation
421
client_structure: Object describing what attributes a client has
422
and is used for storing the client at exit
423
290
current_checker_command: string; current running checker_command
291
disable_hook: If set, called by disable() as disable_hook(self)
424
292
disable_initiator_tag: a gobject event source tag, or None
425
293
enabled: bool()
426
294
fingerprint: string (40 or 32 hexadecimal digits); used to
429
297
interval: datetime.timedelta(); How often to start a new checker
430
298
last_approval_request: datetime.datetime(); (UTC) or None
431
299
last_checked_ok: datetime.datetime(); (UTC) or None
432
last_checker_status: integer between 0 and 255 reflecting exit
433
status of last checker. -1 reflects crashed
434
checker, -2 means no checker completed yet.
435
last_enabled: datetime.datetime(); (UTC) or None
300
last_enabled: datetime.datetime(); (UTC)
436
301
name: string; from the config file, used in log messages and
437
302
D-Bus identifiers
438
303
secret: bytestring; sent verbatim (over TLS) to client
439
304
timeout: datetime.timedelta(); How long from last_checked_ok
440
305
until this client is disabled
441
extended_timeout: extra long timeout when secret has been sent
306
extended_timeout: extra long timeout when password has been sent
442
307
runtime_expansions: Allowed attributes for runtime expansion.
443
308
expires: datetime.datetime(); time (UTC) when a client will be
444
309
disabled, or None
445
server_settings: The server_settings dict from main()
446
310
"""
447
311
448
312
runtime_expansions = ("approval_delay", "approval_duration",
449
"created", "enabled", "expires",
450
"fingerprint", "host", "interval",
451
"last_approval_request", "last_checked_ok",
313
"created", "enabled", "fingerprint",
314
"host", "interval", "last_checked_ok",
452
315
"last_enabled", "name", "timeout")
453
client_defaults = { "timeout": "PT5M",
454
"extended_timeout": "PT15M",
455
"interval": "PT2M",
456
"checker": "fping -q -- %%(host)s",
457
"host": "",
458
"approval_delay": "PT0S",
459
"approval_duration": "PT1S",
460
"approved_by_default": "True",
461
"enabled": "True",
462
}
463
464
@staticmethod
465
def config_parser(config):
466
"""Construct a new dict of client settings of this form:
467
{ client_name: {setting_name: value, ...}, ...}
468
with exceptions for any special settings as defined above.
469
NOTE: Must be a pure function. Must return the same result
470
value given the same arguments.
471
"""
472
settings = {}
473
for client_name in config.sections():
474
section = dict(config.items(client_name))
475
client = settings[client_name] = {}
476
477
client["host"] = section["host"]
478
# Reformat values from string types to Python types
479
client["approved_by_default"] = config.getboolean(
480
client_name, "approved_by_default")
481
client["enabled"] = config.getboolean(client_name,
482
"enabled")
483
484
client["fingerprint"] = (section["fingerprint"].upper()
485
.replace(" ", ""))
486
if "secret" in section:
487
client["secret"] = section["secret"].decode("base64")
488
elif "secfile" in section:
489
with open(os.path.expanduser(os.path.expandvars
490
(section["secfile"])),
491
"rb") as secfile:
492
client["secret"] = secfile.read()
493
else:
494
raise TypeError("No secret or secfile for section {}"
495
.format(section))
496
client["timeout"] = string_to_delta(section["timeout"])
497
client["extended_timeout"] = string_to_delta(
498
section["extended_timeout"])
499
client["interval"] = string_to_delta(section["interval"])
500
client["approval_delay"] = string_to_delta(
501
section["approval_delay"])
502
client["approval_duration"] = string_to_delta(
503
section["approval_duration"])
504
client["checker_command"] = section["checker"]
505
client["last_approval_request"] = None
506
client["last_checked_ok"] = None
507
client["last_checker_status"] = -2
508
316
509
return settings
510
511
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."""
512
336
self.name = name
513
if server_settings is None:
514
server_settings = {}
515
self.server_settings = server_settings
516
# adding all client settings
517
for setting, value in settings.items():
518
setattr(self, setting, value)
519
520
if self.enabled:
521
if not hasattr(self, "last_enabled"):
522
self.last_enabled = datetime.datetime.utcnow()
523
if not hasattr(self, "expires"):
524
self.expires = (datetime.datetime.utcnow()
525
+ self.timeout)
526
else:
527
self.last_enabled = None
528
self.expires = None
529
337
if config is None:
338
config = {}
530
339
logger.debug("Creating client %r", self.name)
531
340
# Uppercase and remove spaces from fingerprint for later
532
341
# comparison purposes with return value from the fingerprint()
533
342
# function
343
self.fingerprint = (config["fingerprint"].upper()
344
.replace(" ", ""))
534
345
logger.debug(" Fingerprint: %s", self.fingerprint)
535
self.created = settings.get("created",
536
datetime.datetime.utcnow())
537
538
# 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
539
366
self.checker = None
540
367
self.checker_initiator_tag = None
541
368
self.disable_initiator_tag = None
369
self.expires = None
542
370
self.checker_callback_tag = None
371
self.checker_command = config["checker"]
543
372
self.current_checker_command = None
544
self.approved = None
373
self.last_connect = None
374
self._approved = None
375
self.approved_by_default = config.get("approved_by_default",
376
True)
545
377
self.approvals_pending = 0
546
self.changedstate = (multiprocessing_manager
547
.Condition(multiprocessing_manager
548
.Lock()))
549
self.client_structure = [attr for attr in
550
self.__dict__.iterkeys()
551
if not attr.startswith("_")]
552
self.client_structure.append("client_structure")
553
554
for name, t in inspect.getmembers(type(self),
555
lambda obj:
556
isinstance(obj,
557
property)):
558
if not name.startswith("_"):
559
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())
560
383
561
# Send notice to process children that client state has changed
562
384
def send_changedstate(self):
563
with self.changedstate:
564
self.changedstate.notify_all()
565
385
self.changedstate.acquire()
386
self.changedstate.notify_all()
387
self.changedstate.release()
388
566
389
def enable(self):
567
390
"""Start this client's checker and timeout hooks"""
568
391
if getattr(self, "enabled", False):
569
392
# Already enabled
570
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
571
401
self.expires = datetime.datetime.utcnow() + self.timeout
402
self.disable_initiator_tag = (gobject.timeout_add
403
(self.timeout_milliseconds(),
404
self.disable))
572
405
self.enabled = True
573
406
self.last_enabled = datetime.datetime.utcnow()
574
self.init_checker()
575
self.send_changedstate()
407
# Also start a new checker *right now*.
408
self.start_checker()
576
409
577
410
def disable(self, quiet=True):
578
411
"""Disable this client."""
579
412
if not getattr(self, "enabled", False):
580
413
return False
581
414
if not quiet:
415
self.send_changedstate()
416
if not quiet:
582
417
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", None) is not None:
418
if getattr(self, "disable_initiator_tag", False):
584
419
gobject.source_remove(self.disable_initiator_tag)
585
420
self.disable_initiator_tag = None
586
421
self.expires = None
587
if getattr(self, "checker_initiator_tag", None) is not None:
422
if getattr(self, "checker_initiator_tag", False):
588
423
gobject.source_remove(self.checker_initiator_tag)
589
424
self.checker_initiator_tag = None
590
425
self.stop_checker()
426
if self.disable_hook:
427
self.disable_hook(self)
591
428
self.enabled = False
592
if not quiet:
593
self.send_changedstate()
594
429
# Do not run this again if called by a gobject.timeout_add
595
430
return False
596
431
597
432
def __del__(self):
433
self.disable_hook = None
598
434
self.disable()
599
435
600
def init_checker(self):
601
# Schedule a new checker to be started an 'interval' from now,
602
# and every interval from then on.
603
if self.checker_initiator_tag is not None:
604
gobject.source_remove(self.checker_initiator_tag)
605
self.checker_initiator_tag = (gobject.timeout_add
606
(int(self.interval
607
.total_seconds() * 1000),
608
self.start_checker))
609
# Schedule a disable() when 'timeout' has passed
610
if self.disable_initiator_tag is not None:
611
gobject.source_remove(self.disable_initiator_tag)
612
self.disable_initiator_tag = (gobject.timeout_add
613
(int(self.timeout
614
.total_seconds() * 1000),
615
self.disable))
616
# Also start a new checker *right now*.
617
self.start_checker()
618
619
436
def checker_callback(self, pid, condition, command):
620
437
"""The checker has completed, so take appropriate actions."""
621
438
self.checker_callback_tag = None
622
439
self.checker = None
623
440
if os.WIFEXITED(condition):
624
self.last_checker_status = os.WEXITSTATUS(condition)
625
if self.last_checker_status == 0:
441
exitstatus = os.WEXITSTATUS(condition)
442
if exitstatus == 0:
626
443
logger.info("Checker for %(name)s succeeded",
627
444
vars(self))
628
445
self.checked_ok()
630
447
logger.info("Checker for %(name)s failed",
631
448
vars(self))
632
449
else:
633
self.last_checker_status = -1
634
450
logger.warning("Checker for %(name)s crashed?",
635
451
vars(self))
636
452
637
def checked_ok(self):
638
"""Assert that the client has been seen, alive and well."""
639
self.last_checked_ok = datetime.datetime.utcnow()
640
self.last_checker_status = 0
641
self.bump_timeout()
642
643
def bump_timeout(self, timeout=None):
644
"""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
"""
645
459
if timeout is None:
646
460
timeout = self.timeout
647
if self.disable_initiator_tag is not None:
648
gobject.source_remove(self.disable_initiator_tag)
649
self.disable_initiator_tag = None
650
if getattr(self, "enabled", False):
651
self.disable_initiator_tag = (gobject.timeout_add
652
(int(timeout.total_seconds()
653
* 1000), self.disable))
654
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))
655
467
656
468
def need_approval(self):
657
469
self.last_approval_request = datetime.datetime.utcnow()
662
474
If a checker already exists, leave it running and do
663
475
nothing."""
664
476
# The reason for not killing a running checker is that if we
665
# did that, and if a checker (for some reason) started running
666
# slowly and taking more than 'interval' time, then the client
667
# would inevitably timeout, since no checker would get a
668
# 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
669
481
# checkers alone, the checker would have to take more time
670
482
# than 'timeout' for the client to be disabled, which is as it
671
483
# should be.
673
485
# If a checker exists, make sure it is not a zombie
674
486
try:
675
487
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
676
except AttributeError:
677
pass
678
except OSError as error:
679
if error.errno != errno.ECHILD:
680
raise
488
except (AttributeError, OSError) as error:
489
if (isinstance(error, OSError)
490
and error.errno != errno.ECHILD):
491
raise error
681
492
else:
682
493
if pid:
683
494
logger.warning("Checker was a zombie")
686
497
self.current_checker_command)
687
498
# Start a new checker if needed
688
499
if self.checker is None:
689
# Escape attributes for the shell
690
escaped_attrs = { attr:
691
re.escape(str(getattr(self, attr)))
692
for attr in self.runtime_expansions }
693
500
try:
694
command = self.checker_command % escaped_attrs
695
except TypeError as error:
696
logger.error('Could not format string "%s"',
697
self.checker_command, exc_info=error)
698
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
699
519
self.current_checker_command = command
700
520
try:
701
521
logger.info("Starting checker %r for %s",
704
524
# in normal mode, that is already done by daemon(),
705
525
# and in debug mode we don't want to. (Stdin is
706
526
# always replaced by /dev/null.)
707
# The exception is when not debugging but nevertheless
708
# running in the foreground; use the previously
709
# created wnull.
710
popen_args = {}
711
if (not self.server_settings["debug"]
712
and self.server_settings["foreground"]):
713
popen_args.update({"stdout": wnull,
714
"stderr": wnull })
715
527
self.checker = subprocess.Popen(command,
716
528
close_fds=True,
717
shell=True, cwd="/",
718
**popen_args)
719
except OSError as error:
720
logger.error("Failed to start subprocess",
721
exc_info=error)
722
return True
723
self.checker_callback_tag = (gobject.child_watch_add
724
(self.checker.pid,
725
self.checker_callback,
726
data=command))
727
# The checker may have completed before the gobject
728
# watch was added. Check for this.
729
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.
730
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)
731
540
except OSError as error:
732
if error.errno == errno.ECHILD:
733
# This should never happen
734
logger.error("Child process vanished",
735
exc_info=error)
736
return True
737
raise
738
if pid:
739
gobject.source_remove(self.checker_callback_tag)
740
self.checker_callback(pid, status, command)
541
logger.error("Failed to start subprocess: %s",
542
error)
741
543
# Re-run this periodically if run by gobject.timeout_add
742
544
return True
743
545
750
552
return
751
553
logger.debug("Stopping checker for %(name)s", vars(self))
752
554
try:
753
self.checker.terminate()
555
os.kill(self.checker.pid, signal.SIGTERM)
754
556
#time.sleep(0.5)
755
557
#if self.checker.poll() is None:
756
# self.checker.kill()
558
# os.kill(self.checker.pid, signal.SIGKILL)
757
559
except OSError as error:
758
560
if error.errno != errno.ESRCH: # No such process
759
561
raise
760
562
self.checker = None
761
563
762
763
564
def dbus_service_property(dbus_interface, signature="v",
764
565
access="readwrite", byte_arrays=False):
765
566
"""Decorators for marking methods of a DBusObjectWithProperties to
776
577
# "Set" method, so we fail early here:
777
578
if byte_arrays and signature != "ay":
778
579
raise ValueError("Byte arrays not supported for non-'ay'"
779
" signature {!r}".format(signature))
580
" signature %r" % signature)
780
581
def decorator(func):
781
582
func._dbus_is_property = True
782
583
func._dbus_interface = dbus_interface
790
591
return decorator
791
592
792
593
793
def dbus_interface_annotations(dbus_interface):
794
"""Decorator for marking functions returning interface annotations
795
796
Usage:
797
798
@dbus_interface_annotations("org.example.Interface")
799
def _foo(self): # Function name does not matter
800
return {"org.freedesktop.DBus.Deprecated": "true",
801
"org.freedesktop.DBus.Property.EmitsChangedSignal":
802
"false"}
803
"""
804
def decorator(func):
805
func._dbus_is_interface = True
806
func._dbus_interface = dbus_interface
807
func._dbus_name = dbus_interface
808
return func
809
return decorator
810
811
812
def dbus_annotations(annotations):
813
"""Decorator to annotate D-Bus methods, signals or properties
814
Usage:
815
816
@dbus_service_property("org.example.Interface", signature="b",
817
access="r")
818
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
819
"org.freedesktop.DBus.Property."
820
"EmitsChangedSignal": "false"})
821
def Property_dbus_property(self):
822
return dbus.Boolean(False)
823
"""
824
def decorator(func):
825
func._dbus_annotations = annotations
826
return func
827
return decorator
828
829
830
594
class DBusPropertyException(dbus.exceptions.DBusException):
831
595
"""A base class for D-Bus property-related exceptions
832
596
"""
833
pass
597
def __unicode__(self):
598
return unicode(str(self))
599
834
600
835
601
class DBusPropertyAccessException(DBusPropertyException):
836
602
"""A property's access permissions disallows an operation.
846
612
847
613
class DBusObjectWithProperties(dbus.service.Object):
848
614
"""A D-Bus object with properties.
849
615
850
616
Classes inheriting from this can use the dbus_service_property
851
617
decorator to expose methods as D-Bus properties. It exposes the
852
618
standard Get(), Set(), and GetAll() methods on the D-Bus.
853
619
"""
854
620
855
621
@staticmethod
856
def _is_dbus_thing(thing):
857
"""Returns a function testing if an attribute is a D-Bus thing
858
859
If called like _is_dbus_thing("method") it returns a function
860
suitable for use as predicate to inspect.getmembers().
861
"""
862
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
863
False)
622
def _is_dbus_property(obj):
623
return getattr(obj, "_dbus_is_property", False)
864
624
865
def _get_all_dbus_things(self, thing):
625
def _get_all_dbus_properties(self):
866
626
"""Returns a generator of (name, attribute) pairs
867
627
"""
868
return ((getattr(athing.__get__(self), "_dbus_name",
869
name),
870
athing.__get__(self))
871
for cls in self.__class__.__mro__
872
for name, athing in
873
inspect.getmembers(cls,
874
self._is_dbus_thing(thing)))
628
return ((prop._dbus_name, prop)
629
for name, prop in
630
inspect.getmembers(self, self._is_dbus_property))
875
631
876
632
def _get_dbus_property(self, interface_name, property_name):
877
633
"""Returns a bound method if one exists which is a D-Bus
878
634
property with the specified name and interface.
879
635
"""
880
for cls in self.__class__.__mro__:
881
for name, value in (inspect.getmembers
882
(cls,
883
self._is_dbus_thing("property"))):
884
if (value._dbus_name == property_name
885
and value._dbus_interface == interface_name):
886
return value.__get__(self)
887
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
888
646
# No such property
889
647
raise DBusPropertyNotFound(self.dbus_object_path + ":"
890
648
+ interface_name + "."
914
672
# The byte_arrays option is not supported yet on
915
673
# signatures other than "ay".
916
674
if prop._dbus_signature != "ay":
917
raise ValueError("Byte arrays not supported for non-"
918
"'ay' signature {!r}"
919
.format(prop._dbus_signature))
920
value = dbus.ByteArray(b''.join(chr(byte)
921
for byte in value))
675
raise ValueError
676
value = dbus.ByteArray(''.join(unichr(byte)
677
for byte in value))
922
678
prop(value)
923
679
924
680
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
926
682
def GetAll(self, interface_name):
927
683
"""Standard D-Bus property GetAll() method, see D-Bus
928
684
standard.
929
685
930
686
Note: Will not include properties with access="write".
931
687
"""
932
properties = {}
933
for name, prop in self._get_all_dbus_things("property"):
688
all = {}
689
for name, prop in self._get_all_dbus_properties():
934
690
if (interface_name
935
691
and interface_name != prop._dbus_interface):
936
692
# Interface non-empty but did not match
940
696
continue
941
697
value = prop()
942
698
if not hasattr(value, "variant_level"):
943
properties[name] = value
699
all[name] = value
944
700
continue
945
properties[name] = type(value)(value, variant_level=
946
value.variant_level+1)
947
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")
948
704
949
705
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
950
706
out_signature="s",
951
707
path_keyword='object_path',
952
708
connection_keyword='connection')
953
709
def Introspect(self, object_path, connection):
954
"""Overloading of standard D-Bus method.
955
956
Inserts property tags and interface annotation tags.
710
"""Standard D-Bus method, overloaded to insert property tags.
957
711
"""
958
712
xmlstring = dbus.service.Object.Introspect(self, object_path,
959
713
connection)
966
720
e.setAttribute("access", prop._dbus_access)
967
721
return e
968
722
for if_tag in document.getElementsByTagName("interface"):
969
# Add property tags
970
723
for tag in (make_tag(document, name, prop)
971
724
for name, prop
972
in self._get_all_dbus_things("property")
725
in self._get_all_dbus_properties()
973
726
if prop._dbus_interface
974
727
== if_tag.getAttribute("name")):
975
728
if_tag.appendChild(tag)
976
# Add annotation tags
977
for typ in ("method", "signal", "property"):
978
for tag in if_tag.getElementsByTagName(typ):
979
annots = dict()
980
for name, prop in (self.
981
_get_all_dbus_things(typ)):
982
if (name == tag.getAttribute("name")
983
and prop._dbus_interface
984
== if_tag.getAttribute("name")):
985
annots.update(getattr
986
(prop,
987
"_dbus_annotations",
988
{}))
989
for name, value in annots.items():
990
ann_tag = document.createElement(
991
"annotation")
992
ann_tag.setAttribute("name", name)
993
ann_tag.setAttribute("value", value)
994
tag.appendChild(ann_tag)
995
# Add interface annotation tags
996
for annotation, value in dict(
997
itertools.chain.from_iterable(
998
annotations().items()
999
for name, annotations in
1000
self._get_all_dbus_things("interface")
1001
if name == if_tag.getAttribute("name")
1002
)).items():
1003
ann_tag = document.createElement("annotation")
1004
ann_tag.setAttribute("name", annotation)
1005
ann_tag.setAttribute("value", value)
1006
if_tag.appendChild(ann_tag)
1007
729
# Add the names to the return values for the
1008
730
# "org.freedesktop.DBus.Properties" methods
1009
731
if (if_tag.getAttribute("name")
1024
746
except (AttributeError, xml.dom.DOMException,
1025
747
xml.parsers.expat.ExpatError) as error:
1026
748
logger.error("Failed to override Introspection method",
1027
exc_info=error)
749
error)
1028
750
return xmlstring
1029
751
1030
752
1031
def datetime_to_dbus(dt, variant_level=0):
753
def datetime_to_dbus (dt, variant_level=0):
1032
754
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1033
755
if dt is None:
1034
756
return dbus.String("", variant_level = variant_level)
1035
757
return dbus.String(dt.isoformat(),
1036
758
variant_level=variant_level)
1037
759
1038
1039
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1040
"""A class decorator; applied to a subclass of
1041
dbus.service.Object, it will add alternate D-Bus attributes with
1042
interface names according to the "alt_interface_names" mapping.
1043
Usage:
1044
1045
@alternate_dbus_interfaces({"org.example.Interface":
1046
"net.example.AlternateInterface"})
1047
class SampleDBusObject(dbus.service.Object):
1048
@dbus.service.method("org.example.Interface")
1049
def SampleDBusMethod():
1050
pass
1051
1052
The above "SampleDBusMethod" on "SampleDBusObject" will be
1053
reachable via two interfaces: "org.example.Interface" and
1054
"net.example.AlternateInterface", the latter of which will have
1055
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1056
"true", unless "deprecate" is passed with a False value.
1057
1058
This works for methods and signals, and also for D-Bus properties
1059
(from DBusObjectWithProperties) and interfaces (from the
1060
dbus_interface_annotations decorator).
1061
"""
1062
def wrapper(cls):
1063
for orig_interface_name, alt_interface_name in (
1064
alt_interface_names.items()):
1065
attr = {}
1066
interface_names = set()
1067
# Go though all attributes of the class
1068
for attrname, attribute in inspect.getmembers(cls):
1069
# Ignore non-D-Bus attributes, and D-Bus attributes
1070
# with the wrong interface name
1071
if (not hasattr(attribute, "_dbus_interface")
1072
or not attribute._dbus_interface
1073
.startswith(orig_interface_name)):
1074
continue
1075
# Create an alternate D-Bus interface name based on
1076
# the current name
1077
alt_interface = (attribute._dbus_interface
1078
.replace(orig_interface_name,
1079
alt_interface_name))
1080
interface_names.add(alt_interface)
1081
# Is this a D-Bus signal?
1082
if getattr(attribute, "_dbus_is_signal", False):
1083
# Extract the original non-method undecorated
1084
# function by black magic
1085
nonmethod_func = (dict(
1086
zip(attribute.func_code.co_freevars,
1087
attribute.__closure__))["func"]
1088
.cell_contents)
1089
# Create a new, but exactly alike, function
1090
# object, and decorate it to be a new D-Bus signal
1091
# with the alternate D-Bus interface name
1092
new_function = (dbus.service.signal
1093
(alt_interface,
1094
attribute._dbus_signature)
1095
(types.FunctionType(
1096
nonmethod_func.func_code,
1097
nonmethod_func.func_globals,
1098
nonmethod_func.func_name,
1099
nonmethod_func.func_defaults,
1100
nonmethod_func.func_closure)))
1101
# Copy annotations, if any
1102
try:
1103
new_function._dbus_annotations = (
1104
dict(attribute._dbus_annotations))
1105
except AttributeError:
1106
pass
1107
# Define a creator of a function to call both the
1108
# original and alternate functions, so both the
1109
# original and alternate signals gets sent when
1110
# the function is called
1111
def fixscope(func1, func2):
1112
"""This function is a scope container to pass
1113
func1 and func2 to the "call_both" function
1114
outside of its arguments"""
1115
def call_both(*args, **kwargs):
1116
"""This function will emit two D-Bus
1117
signals by calling func1 and func2"""
1118
func1(*args, **kwargs)
1119
func2(*args, **kwargs)
1120
return call_both
1121
# Create the "call_both" function and add it to
1122
# the class
1123
attr[attrname] = fixscope(attribute, new_function)
1124
# Is this a D-Bus method?
1125
elif getattr(attribute, "_dbus_is_method", False):
1126
# Create a new, but exactly alike, function
1127
# object. Decorate it to be a new D-Bus method
1128
# with the alternate D-Bus interface name. Add it
1129
# to the class.
1130
attr[attrname] = (dbus.service.method
1131
(alt_interface,
1132
attribute._dbus_in_signature,
1133
attribute._dbus_out_signature)
1134
(types.FunctionType
1135
(attribute.func_code,
1136
attribute.func_globals,
1137
attribute.func_name,
1138
attribute.func_defaults,
1139
attribute.func_closure)))
1140
# Copy annotations, if any
1141
try:
1142
attr[attrname]._dbus_annotations = (
1143
dict(attribute._dbus_annotations))
1144
except AttributeError:
1145
pass
1146
# Is this a D-Bus property?
1147
elif getattr(attribute, "_dbus_is_property", False):
1148
# Create a new, but exactly alike, function
1149
# object, and decorate it to be a new D-Bus
1150
# property with the alternate D-Bus interface
1151
# name. Add it to the class.
1152
attr[attrname] = (dbus_service_property
1153
(alt_interface,
1154
attribute._dbus_signature,
1155
attribute._dbus_access,
1156
attribute
1157
._dbus_get_args_options
1158
["byte_arrays"])
1159
(types.FunctionType
1160
(attribute.func_code,
1161
attribute.func_globals,
1162
attribute.func_name,
1163
attribute.func_defaults,
1164
attribute.func_closure)))
1165
# Copy annotations, if any
1166
try:
1167
attr[attrname]._dbus_annotations = (
1168
dict(attribute._dbus_annotations))
1169
except AttributeError:
1170
pass
1171
# Is this a D-Bus interface?
1172
elif getattr(attribute, "_dbus_is_interface", False):
1173
# Create a new, but exactly alike, function
1174
# object. Decorate it to be a new D-Bus interface
1175
# with the alternate D-Bus interface name. Add it
1176
# to the class.
1177
attr[attrname] = (dbus_interface_annotations
1178
(alt_interface)
1179
(types.FunctionType
1180
(attribute.func_code,
1181
attribute.func_globals,
1182
attribute.func_name,
1183
attribute.func_defaults,
1184
attribute.func_closure)))
1185
if deprecate:
1186
# Deprecate all alternate interfaces
1187
iname="_AlternateDBusNames_interface_annotation{}"
1188
for interface_name in interface_names:
1189
@dbus_interface_annotations(interface_name)
1190
def func(self):
1191
return { "org.freedesktop.DBus.Deprecated":
1192
"true" }
1193
# Find an unused name
1194
for aname in (iname.format(i)
1195
for i in itertools.count()):
1196
if aname not in attr:
1197
attr[aname] = func
1198
break
1199
if interface_names:
1200
# Replace the class with a new subclass of it with
1201
# methods, signals, etc. as created above.
1202
cls = type(b"{}Alternate".format(cls.__name__),
1203
(cls,), attr)
1204
return cls
1205
return wrapper
1206
1207
1208
@alternate_dbus_interfaces({"se.recompile.Mandos":
1209
"se.bsnet.fukt.Mandos"})
1210
760
class ClientDBus(Client, DBusObjectWithProperties):
1211
761
"""A Client class using D-Bus
1212
762
1221
771
# dbus.service.Object doesn't use super(), so we can't either.
1222
772
1223
773
def __init__(self, bus = None, *args, **kwargs):
774
self._approvals_pending = 0
1224
775
self.bus = bus
1225
776
Client.__init__(self, *args, **kwargs)
1226
777
# Only now, when this client is initialized, can it show up on
1227
778
# the D-Bus
1228
client_object_name = str(self.name).translate(
779
client_object_name = unicode(self.name).translate(
1229
780
{ord("."): ord("_"),
1230
781
ord("-"): ord("_")})
1231
782
self.dbus_object_path = (dbus.ObjectPath
1232
783
("/clients/" + client_object_name))
1233
784
DBusObjectWithProperties.__init__(self, self.bus,
1234
785
self.dbus_object_path)
1235
786
1236
787
def notifychangeproperty(transform_func,
1237
788
dbus_name, type_func=lambda x: x,
1238
789
variant_level=1):
1239
""" Modify a variable so that it's a property which announces
1240
its changes to DBus.
1241
1242
transform_fun: Function that takes a value and a variant_level
1243
and transforms it to a D-Bus type.
1244
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
1245
795
type_func: Function that transform the value before sending it
1246
to the D-Bus. Default: no transform
1247
variant_level: D-Bus variant level. Default: 1
796
to DBus
797
variant_level: DBus variant level. default: 1
1248
798
"""
1249
attrname = "_{}".format(dbus_name)
799
real_value = [None,]
1250
800
def setter(self, value):
801
old_value = real_value[0]
802
real_value[0] = value
1251
803
if hasattr(self, "dbus_object_path"):
1252
if (not hasattr(self, attrname) or
1253
type_func(getattr(self, attrname, None))
1254
!= type_func(value)):
1255
dbus_value = transform_func(type_func(value),
1256
variant_level
1257
=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)
1258
807
self.PropertyChanged(dbus.String(dbus_name),
1259
808
dbus_value)
1260
setattr(self, attrname, value)
1261
1262
return property(lambda self: getattr(self, attrname), setter)
1263
809
810
return property(lambda self: real_value[0], setter)
811
812
1264
813
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1265
814
approvals_pending = notifychangeproperty(dbus.Boolean,
1266
815
"ApprovalPending",
1269
818
last_enabled = notifychangeproperty(datetime_to_dbus,
1270
819
"LastEnabled")
1271
820
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1272
type_func = lambda checker:
1273
checker is not None)
821
type_func = lambda checker: checker is not None)
1274
822
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1275
823
"LastCheckedOK")
1276
last_checker_status = notifychangeproperty(dbus.Int16,
1277
"LastCheckerStatus")
1278
last_approval_request = notifychangeproperty(
1279
datetime_to_dbus, "LastApprovalRequest")
824
last_approval_request = notifychangeproperty(datetime_to_dbus,
825
"LastApprovalRequest")
1280
826
approved_by_default = notifychangeproperty(dbus.Boolean,
1281
827
"ApprovedByDefault")
1282
approval_delay = notifychangeproperty(dbus.UInt64,
1283
"ApprovalDelay",
1284
type_func =
1285
lambda td: td.total_seconds()
1286
* 1000)
1287
approval_duration = notifychangeproperty(
1288
dbus.UInt64, "ApprovalDuration",
1289
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)
1290
832
host = notifychangeproperty(dbus.String, "Host")
1291
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1292
type_func = lambda td:
1293
td.total_seconds() * 1000)
1294
extended_timeout = notifychangeproperty(
1295
dbus.UInt64, "ExtendedTimeout",
1296
type_func = lambda td: td.total_seconds() * 1000)
1297
interval = notifychangeproperty(dbus.UInt64,
1298
"Interval",
1299
type_func =
1300
lambda td: td.total_seconds()
1301
* 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)
1302
839
checker_command = notifychangeproperty(dbus.String, "Checker")
1303
840
1304
841
del notifychangeproperty
1330
867
1331
868
return Client.checker_callback(self, pid, condition, command,
1332
869
*args, **kwargs)
1333
870
1334
871
def start_checker(self, *args, **kwargs):
1335
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
1336
877
r = Client.start_checker(self, *args, **kwargs)
1337
878
# Only if new checker process was started
1338
879
if (self.checker is not None
1342
883
return r
1343
884
1344
885
def _reset_approved(self):
1345
self.approved = None
886
self._approved = None
1346
887
return False
1347
888
1348
889
def approve(self, value=True):
1349
self.approved = value
1350
gobject.timeout_add(int(self.approval_duration.total_seconds()
1351
* 1000), self._reset_approved)
1352
890
self.send_changedstate()
891
self._approved = value
892
gobject.timeout_add(_timedelta_to_milliseconds
893
(self.approval_duration),
894
self._reset_approved)
895
1353
896
1354
897
## D-Bus methods, signals & properties
1355
_interface = "se.recompile.Mandos.Client"
1356
1357
## Interfaces
1358
1359
@dbus_interface_annotations(_interface)
1360
def _foo(self):
1361
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1362
"false"}
898
_interface = "se.bsnet.fukt.Mandos.Client"
1363
899
1364
900
## Signals
1365
901
1457
993
access="readwrite")
1458
994
def ApprovalDelay_dbus_property(self, value=None):
1459
995
if value is None: # get
1460
return dbus.UInt64(self.approval_delay.total_seconds()
1461
* 1000)
996
return dbus.UInt64(self.approval_delay_milliseconds())
1462
997
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1463
998
1464
999
# ApprovalDuration - property
1466
1001
access="readwrite")
1467
1002
def ApprovalDuration_dbus_property(self, value=None):
1468
1003
if value is None: # get
1469
return dbus.UInt64(self.approval_duration.total_seconds()
1470
* 1000)
1004
return dbus.UInt64(_timedelta_to_milliseconds(
1005
self.approval_duration))
1471
1006
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1472
1007
1473
1008
# Name - property
1486
1021
def Host_dbus_property(self, value=None):
1487
1022
if value is None: # get
1488
1023
return dbus.String(self.host)
1489
self.host = str(value)
1024
self.host = value
1490
1025
1491
1026
# Created - property
1492
1027
@dbus_service_property(_interface, signature="s", access="read")
1493
1028
def Created_dbus_property(self):
1494
return datetime_to_dbus(self.created)
1029
return dbus.String(datetime_to_dbus(self.created))
1495
1030
1496
1031
# LastEnabled - property
1497
1032
@dbus_service_property(_interface, signature="s", access="read")
1518
1053
return
1519
1054
return datetime_to_dbus(self.last_checked_ok)
1520
1055
1521
# LastCheckerStatus - property
1522
@dbus_service_property(_interface, signature="n",
1523
access="read")
1524
def LastCheckerStatus_dbus_property(self):
1525
return dbus.Int16(self.last_checker_status)
1526
1527
1056
# Expires - property
1528
1057
@dbus_service_property(_interface, signature="s", access="read")
1529
1058
def Expires_dbus_property(self):
1539
1068
access="readwrite")
1540
1069
def Timeout_dbus_property(self, value=None):
1541
1070
if value is None: # get
1542
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1543
old_timeout = self.timeout
1071
return dbus.UInt64(self.timeout_milliseconds())
1544
1072
self.timeout = datetime.timedelta(0, 0, 0, value)
1545
# Reschedule disabling
1546
if self.enabled:
1547
now = datetime.datetime.utcnow()
1548
self.expires += self.timeout - old_timeout
1549
if self.expires <= now:
1550
# The timeout has passed
1551
self.disable()
1552
else:
1553
if (getattr(self, "disable_initiator_tag", None)
1554
is None):
1555
return
1556
gobject.source_remove(self.disable_initiator_tag)
1557
self.disable_initiator_tag = (
1558
gobject.timeout_add(
1559
int((self.expires - now).total_seconds()
1560
* 1000), self.disable))
1561
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
1562
1094
# ExtendedTimeout - property
1563
1095
@dbus_service_property(_interface, signature="t",
1564
1096
access="readwrite")
1565
1097
def ExtendedTimeout_dbus_property(self, value=None):
1566
1098
if value is None: # get
1567
return dbus.UInt64(self.extended_timeout.total_seconds()
1568
* 1000)
1099
return dbus.UInt64(self.extended_timeout_milliseconds())
1569
1100
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1570
1101
1571
1102
# Interval - property
1572
1103
@dbus_service_property(_interface, signature="t",
1573
1104
access="readwrite")
1574
1105
def Interval_dbus_property(self, value=None):
1575
1106
if value is None: # get
1576
return dbus.UInt64(self.interval.total_seconds() * 1000)
1107
return dbus.UInt64(self.interval_milliseconds())
1577
1108
self.interval = datetime.timedelta(0, 0, 0, value)
1578
1109
if getattr(self, "checker_initiator_tag", None) is None:
1579
1110
return
1580
if self.enabled:
1581
# Reschedule checker run
1582
gobject.source_remove(self.checker_initiator_tag)
1583
self.checker_initiator_tag = (gobject.timeout_add
1584
(value, self.start_checker))
1585
self.start_checker() # Start one now, too
1586
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
1587
1117
# Checker - property
1588
1118
@dbus_service_property(_interface, signature="s",
1589
1119
access="readwrite")
1590
1120
def Checker_dbus_property(self, value=None):
1591
1121
if value is None: # get
1592
1122
return dbus.String(self.checker_command)
1593
self.checker_command = str(value)
1123
self.checker_command = value
1594
1124
1595
1125
# CheckerRunning - property
1596
1126
@dbus_service_property(_interface, signature="b",
1612
1142
@dbus_service_property(_interface, signature="ay",
1613
1143
access="write", byte_arrays=True)
1614
1144
def Secret_dbus_property(self, value):
1615
self.secret = bytes(value)
1145
self.secret = str(value)
1616
1146
1617
1147
del _interface
1618
1148
1623
1153
self._pipe.send(('init', fpr, address))
1624
1154
if not self._pipe.recv():
1625
1155
raise KeyError()
1626
1156
1627
1157
def __getattribute__(self, name):
1628
if name == '_pipe':
1158
if(name == '_pipe'):
1629
1159
return super(ProxyClient, self).__getattribute__(name)
1630
1160
self._pipe.send(('getattr', name))
1631
1161
data = self._pipe.recv()
1636
1166
self._pipe.send(('funcall', name, args, kwargs))
1637
1167
return self._pipe.recv()[1]
1638
1168
return func
1639
1169
1640
1170
def __setattr__(self, name, value):
1641
if name == '_pipe':
1171
if(name == '_pipe'):
1642
1172
return super(ProxyClient, self).__setattr__(name, value)
1643
1173
self._pipe.send(('setattr', name, value))
1644
1174
1652
1182
def handle(self):
1653
1183
with contextlib.closing(self.server.child_pipe) as child_pipe:
1654
1184
logger.info("TCP connection from: %s",
1655
str(self.client_address))
1185
unicode(self.client_address))
1656
1186
logger.debug("Pipe FD: %d",
1657
1187
self.server.child_pipe.fileno())
1658
1188
1659
1189
session = (gnutls.connection
1660
1190
.ClientSession(self.request,
1661
1191
gnutls.connection
1662
1192
.X509Credentials()))
1663
1193
1664
1194
# Note: gnutls.connection.X509Credentials is really a
1665
1195
# generic GnuTLS certificate credentials object so long as
1666
1196
# no X.509 keys are added to it. Therefore, we can use it
1667
1197
# here despite using OpenPGP certificates.
1668
1198
1669
1199
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1670
1200
# "+AES-256-CBC", "+SHA1",
1671
1201
# "+COMP-NULL", "+CTYPE-OPENPGP",
1677
1207
(gnutls.library.functions
1678
1208
.gnutls_priority_set_direct(session._c_object,
1679
1209
priority, None))
1680
1210
1681
1211
# Start communication using the Mandos protocol
1682
1212
# Get protocol number
1683
1213
line = self.request.makefile().readline()
1684
1214
logger.debug("Protocol version: %r", line)
1685
1215
try:
1686
1216
if int(line.strip().split()[0]) > 1:
1687
raise RuntimeError(line)
1217
raise RuntimeError
1688
1218
except (ValueError, IndexError, RuntimeError) as error:
1689
1219
logger.error("Unknown protocol version: %s", error)
1690
1220
return
1691
1221
1692
1222
# Start GnuTLS connection
1693
1223
try:
1694
1224
session.handshake()
1698
1228
# established. Just abandon the request.
1699
1229
return
1700
1230
logger.debug("Handshake succeeded")
1701
1231
1702
1232
approval_required = False
1703
1233
try:
1704
1234
try:
1709
1239
logger.warning("Bad certificate: %s", error)
1710
1240
return
1711
1241
logger.debug("Fingerprint: %s", fpr)
1712
1242
1713
1243
try:
1714
1244
client = ProxyClient(child_pipe, fpr,
1715
1245
self.client_address)
1727
1257
client.name)
1728
1258
if self.server.use_dbus:
1729
1259
# Emit D-Bus signal
1730
client.Rejected("Disabled")
1260
client.Rejected("Disabled")
1731
1261
return
1732
1262
1733
if client.approved or not client.approval_delay:
1263
if client._approved or not client.approval_delay:
1734
1264
#We are approved or approval is disabled
1735
1265
break
1736
elif client.approved is None:
1266
elif client._approved is None:
1737
1267
logger.info("Client %s needs approval",
1738
1268
client.name)
1739
1269
if self.server.use_dbus:
1740
1270
# Emit D-Bus signal
1741
1271
client.NeedApproval(
1742
client.approval_delay.total_seconds()
1743
* 1000, client.approved_by_default)
1272
client.approval_delay_milliseconds(),
1273
client.approved_by_default)
1744
1274
else:
1745
1275
logger.warning("Client %s was not approved",
1746
1276
client.name)
1750
1280
return
1751
1281
1752
1282
#wait until timeout or approved
1283
#x = float(client._timedelta_to_milliseconds(delay))
1753
1284
time = datetime.datetime.now()
1754
1285
client.changedstate.acquire()
1755
client.changedstate.wait(delay.total_seconds())
1286
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1756
1287
client.changedstate.release()
1757
1288
time2 = datetime.datetime.now()
1758
1289
if (time2 - time) >= delay:
1774
1305
try:
1775
1306
sent = session.send(client.secret[sent_size:])
1776
1307
except gnutls.errors.GNUTLSError as error:
1777
logger.warning("gnutls send failed",
1778
exc_info=error)
1308
logger.warning("gnutls send failed")
1779
1309
return
1780
1310
logger.debug("Sent: %d, remaining: %d",
1781
1311
sent, len(client.secret)
1782
1312
- (sent_size + sent))
1783
1313
sent_size += sent
1784
1314
1785
1315
logger.info("Sending secret to %s", client.name)
1786
# bump the timeout using extended_timeout
1787
client.bump_timeout(client.extended_timeout)
1316
# bump the timeout as if seen
1317
client.checked_ok(client.extended_timeout)
1788
1318
if self.server.use_dbus:
1789
1319
# Emit D-Bus signal
1790
1320
client.GotSecret()
1795
1325
try:
1796
1326
session.bye()
1797
1327
except gnutls.errors.GNUTLSError as error:
1798
logger.warning("GnuTLS bye failed",
1799
exc_info=error)
1328
logger.warning("GnuTLS bye failed")
1800
1329
1801
1330
@staticmethod
1802
1331
def peer_certificate(session):
1858
1387
# Convert the buffer to a Python bytestring
1859
1388
fpr = ctypes.string_at(buf, buf_len.value)
1860
1389
# Convert the bytestring to hexadecimal notation
1861
hex_fpr = binascii.hexlify(fpr).upper()
1390
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1862
1391
return hex_fpr
1863
1392
1864
1393
1867
1396
def sub_process_main(self, request, address):
1868
1397
try:
1869
1398
self.finish_request(request, address)
1870
except Exception:
1399
except:
1871
1400
self.handle_error(request, address)
1872
1401
self.close_request(request)
1873
1402
1874
1403
def process_request(self, request, address):
1875
1404
"""Start a new process to process the request."""
1876
proc = multiprocessing.Process(target = self.sub_process_main,
1877
args = (request, address))
1878
proc.start()
1879
return proc
1880
1405
multiprocessing.Process(target = self.sub_process_main,
1406
args = (request, address)).start()
1881
1407
1882
1408
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1883
1409
""" adds a pipe to the MixIn """
1887
1413
This function creates a new pipe in self.pipe
1888
1414
"""
1889
1415
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1890
1891
proc = MultiprocessingMixIn.process_request(self, request,
1892
client_address)
1416
1417
super(MultiprocessingMixInWithPipe,
1418
self).process_request(request, client_address)
1893
1419
self.child_pipe.close()
1894
self.add_pipe(parent_pipe, proc)
1895
1896
def add_pipe(self, parent_pipe, proc):
1420
self.add_pipe(parent_pipe)
1421
1422
def add_pipe(self, parent_pipe):
1897
1423
"""Dummy function; override as necessary"""
1898
raise NotImplementedError()
1899
1424
raise NotImplementedError
1900
1425
1901
1426
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1902
1427
socketserver.TCPServer, object):
1908
1433
use_ipv6: Boolean; to use IPv6 or not
1909
1434
"""
1910
1435
def __init__(self, server_address, RequestHandlerClass,
1911
interface=None, use_ipv6=True, socketfd=None):
1912
"""If socketfd is set, use that file descriptor instead of
1913
creating a new one with socket.socket().
1914
"""
1436
interface=None, use_ipv6=True):
1915
1437
self.interface = interface
1916
1438
if use_ipv6:
1917
1439
self.address_family = socket.AF_INET6
1918
if socketfd is not None:
1919
# Save the file descriptor
1920
self.socketfd = socketfd
1921
# Save the original socket.socket() function
1922
self.socket_socket = socket.socket
1923
# To implement --socket, we monkey patch socket.socket.
1924
#
1925
# (When socketserver.TCPServer is a new-style class, we
1926
# could make self.socket into a property instead of monkey
1927
# patching socket.socket.)
1928
#
1929
# Create a one-time-only replacement for socket.socket()
1930
@functools.wraps(socket.socket)
1931
def socket_wrapper(*args, **kwargs):
1932
# Restore original function so subsequent calls are
1933
# not affected.
1934
socket.socket = self.socket_socket
1935
del self.socket_socket
1936
# This time only, return a new socket object from the
1937
# saved file descriptor.
1938
return socket.fromfd(self.socketfd, *args, **kwargs)
1939
# Replace socket.socket() function with wrapper
1940
socket.socket = socket_wrapper
1941
# The socketserver.TCPServer.__init__ will call
1942
# socket.socket(), which might be our replacement,
1943
# socket_wrapper(), if socketfd was set.
1944
1440
socketserver.TCPServer.__init__(self, server_address,
1945
1441
RequestHandlerClass)
1946
1947
1442
def server_bind(self):
1948
1443
"""This overrides the normal server_bind() function
1949
1444
to bind to an interface if one was specified, and also NOT to
1957
1452
try:
1958
1453
self.socket.setsockopt(socket.SOL_SOCKET,
1959
1454
SO_BINDTODEVICE,
1960
(self.interface + "\0")
1961
.encode("utf-8"))
1455
str(self.interface
1456
+ '\0'))
1962
1457
except socket.error as error:
1963
if error.errno == errno.EPERM:
1964
logger.error("No permission to bind to"
1965
" interface %s", self.interface)
1966
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:
1967
1463
logger.error("SO_BINDTODEVICE not available;"
1968
1464
" cannot bind to interface %s",
1969
1465
self.interface)
1970
elif error.errno == errno.ENODEV:
1971
logger.error("Interface %s does not exist,"
1972
" cannot bind", self.interface)
1973
1466
else:
1974
1467
raise
1975
1468
# Only bind(2) the socket if we really need to.
1978
1471
if self.address_family == socket.AF_INET6:
1979
1472
any_address = "::" # in6addr_any
1980
1473
else:
1981
any_address = "0.0.0.0" # INADDR_ANY
1474
any_address = socket.INADDR_ANY
1982
1475
self.server_address = (any_address,
1983
1476
self.server_address[1])
1984
1477
elif not self.server_address[1]:
2005
1498
"""
2006
1499
def __init__(self, server_address, RequestHandlerClass,
2007
1500
interface=None, use_ipv6=True, clients=None,
2008
gnutls_priority=None, use_dbus=True, socketfd=None):
1501
gnutls_priority=None, use_dbus=True):
2009
1502
self.enabled = False
2010
1503
self.clients = clients
2011
1504
if self.clients is None:
2012
self.clients = {}
1505
self.clients = set()
2013
1506
self.use_dbus = use_dbus
2014
1507
self.gnutls_priority = gnutls_priority
2015
1508
IPv6_TCPServer.__init__(self, server_address,
2016
1509
RequestHandlerClass,
2017
1510
interface = interface,
2018
use_ipv6 = use_ipv6,
2019
socketfd = socketfd)
1511
use_ipv6 = use_ipv6)
2020
1512
def server_activate(self):
2021
1513
if self.enabled:
2022
1514
return socketserver.TCPServer.server_activate(self)
2023
2024
1515
def enable(self):
2025
1516
self.enabled = True
2026
2027
def add_pipe(self, parent_pipe, proc):
1517
def add_pipe(self, parent_pipe):
2028
1518
# Call "handle_ipc" for both data and EOF events
2029
1519
gobject.io_add_watch(parent_pipe.fileno(),
2030
1520
gobject.IO_IN | gobject.IO_HUP,
2031
1521
functools.partial(self.handle_ipc,
2032
parent_pipe =
2033
parent_pipe,
2034
proc = proc))
2035
1522
parent_pipe = parent_pipe))
1523
2036
1524
def handle_ipc(self, source, condition, parent_pipe=None,
2037
proc = None, client_object=None):
2038
# error, or the other end of multiprocessing.Pipe has closed
2039
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2040
# Wait for other process to exit
2041
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):
2042
1542
return False
2043
1543
2044
1544
# Read a request from the child
2049
1549
fpr = request[1]
2050
1550
address = request[2]
2051
1551
2052
for c in self.clients.itervalues():
1552
for c in self.clients:
2053
1553
if c.fingerprint == fpr:
2054
1554
client = c
2055
1555
break
2058
1558
"dress: %s", fpr, address)
2059
1559
if self.use_dbus:
2060
1560
# Emit D-Bus signal
2061
mandos_dbus_service.ClientNotFound(fpr,
2062
address[0])
1561
mandos_dbus_service.ClientNotFound(fpr, address[0])
2063
1562
parent_pipe.send(False)
2064
1563
return False
2065
1564
2066
1565
gobject.io_add_watch(parent_pipe.fileno(),
2067
1566
gobject.IO_IN | gobject.IO_HUP,
2068
1567
functools.partial(self.handle_ipc,
2069
parent_pipe =
2070
parent_pipe,
2071
proc = proc,
2072
client_object =
2073
client))
1568
parent_pipe = parent_pipe,
1569
client_object = client))
2074
1570
parent_pipe.send(True)
2075
# remove the old hook in favor of the new above hook on
2076
# same fileno
1571
# remove the old hook in favor of the new above hook on same fileno
2077
1572
return False
2078
1573
if command == 'funcall':
2079
1574
funcname = request[1]
2080
1575
args = request[2]
2081
1576
kwargs = request[3]
2082
1577
2083
parent_pipe.send(('data', getattr(client_object,
2084
funcname)(*args,
2085
**kwargs)))
2086
1578
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1579
2087
1580
if command == 'getattr':
2088
1581
attrname = request[1]
2089
1582
if callable(client_object.__getattribute__(attrname)):
2090
1583
parent_pipe.send(('function',))
2091
1584
else:
2092
parent_pipe.send(('data', client_object
2093
.__getattribute__(attrname)))
1585
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2094
1586
2095
1587
if command == 'setattr':
2096
1588
attrname = request[1]
2097
1589
value = request[2]
2098
1590
setattr(client_object, attrname, value)
2099
1591
2100
1592
return True
2101
1593
2102
1594
2103
def rfc3339_duration_to_delta(duration):
2104
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2105
2106
>>> rfc3339_duration_to_delta("P7D")
2107
datetime.timedelta(7)
2108
>>> rfc3339_duration_to_delta("PT60S")
2109
datetime.timedelta(0, 60)
2110
>>> rfc3339_duration_to_delta("PT60M")
2111
datetime.timedelta(0, 3600)
2112
>>> rfc3339_duration_to_delta("PT24H")
2113
datetime.timedelta(1)
2114
>>> rfc3339_duration_to_delta("P1W")
2115
datetime.timedelta(7)
2116
>>> rfc3339_duration_to_delta("PT5M30S")
2117
datetime.timedelta(0, 330)
2118
>>> rfc3339_duration_to_delta("P1DT3M20S")
2119
datetime.timedelta(1, 200)
2120
"""
2121
2122
# Parsing an RFC 3339 duration with regular expressions is not
2123
# possible - there would have to be multiple places for the same
2124
# values, like seconds. The current code, while more esoteric, is
2125
# cleaner without depending on a parsing library. If Python had a
2126
# built-in library for parsing we would use it, but we'd like to
2127
# avoid excessive use of external libraries.
2128
2129
# New type for defining tokens, syntax, and semantics all-in-one
2130
Token = collections.namedtuple("Token",
2131
("regexp", # To match token; if
2132
# "value" is not None,
2133
# must have a "group"
2134
# containing digits
2135
"value", # datetime.timedelta or
2136
# None
2137
"followers")) # Tokens valid after
2138
# this token
2139
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2140
# the "duration" ABNF definition in RFC 3339, Appendix A.
2141
token_end = Token(re.compile(r"$"), None, frozenset())
2142
token_second = Token(re.compile(r"(\d+)S"),
2143
datetime.timedelta(seconds=1),
2144
frozenset((token_end,)))
2145
token_minute = Token(re.compile(r"(\d+)M"),
2146
datetime.timedelta(minutes=1),
2147
frozenset((token_second, token_end)))
2148
token_hour = Token(re.compile(r"(\d+)H"),
2149
datetime.timedelta(hours=1),
2150
frozenset((token_minute, token_end)))
2151
token_time = Token(re.compile(r"T"),
2152
None,
2153
frozenset((token_hour, token_minute,
2154
token_second)))
2155
token_day = Token(re.compile(r"(\d+)D"),
2156
datetime.timedelta(days=1),
2157
frozenset((token_time, token_end)))
2158
token_month = Token(re.compile(r"(\d+)M"),
2159
datetime.timedelta(weeks=4),
2160
frozenset((token_day, token_end)))
2161
token_year = Token(re.compile(r"(\d+)Y"),
2162
datetime.timedelta(weeks=52),
2163
frozenset((token_month, token_end)))
2164
token_week = Token(re.compile(r"(\d+)W"),
2165
datetime.timedelta(weeks=1),
2166
frozenset((token_end,)))
2167
token_duration = Token(re.compile(r"P"), None,
2168
frozenset((token_year, token_month,
2169
token_day, token_time,
2170
token_week)))
2171
# Define starting values
2172
value = datetime.timedelta() # Value so far
2173
found_token = None
2174
followers = frozenset((token_duration,)) # Following valid tokens
2175
s = duration # String left to parse
2176
# Loop until end token is found
2177
while found_token is not token_end:
2178
# Search for any currently valid tokens
2179
for token in followers:
2180
match = token.regexp.match(s)
2181
if match is not None:
2182
# Token found
2183
if token.value is not None:
2184
# Value found, parse digits
2185
factor = int(match.group(1), 10)
2186
# Add to value so far
2187
value += factor * token.value
2188
# Strip token from string
2189
s = token.regexp.sub("", s, 1)
2190
# Go to found token
2191
found_token = token
2192
# Set valid next tokens
2193
followers = found_token.followers
2194
break
2195
else:
2196
# No currently valid tokens were found
2197
raise ValueError("Invalid RFC 3339 duration")
2198
# End token found
2199
return value
2200
2201
2202
1595
def string_to_delta(interval):
2203
1596
"""Parse a string and return a datetime.timedelta
2204
1597
2215
1608
>>> string_to_delta('5m 30s')
2216
1609
datetime.timedelta(0, 330)
2217
1610
"""
2218
2219
try:
2220
return rfc3339_duration_to_delta(interval)
2221
except ValueError:
2222
pass
2223
2224
1611
timevalue = datetime.timedelta(0)
2225
1612
for s in interval.split():
2226
1613
try:
2227
suffix = s[-1]
1614
suffix = unicode(s[-1])
2228
1615
value = int(s[:-1])
2229
1616
if suffix == "d":
2230
1617
delta = datetime.timedelta(value)
2237
1624
elif suffix == "w":
2238
1625
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2239
1626
else:
2240
raise ValueError("Unknown suffix {!r}"
2241
.format(suffix))
2242
except IndexError as e:
1627
raise ValueError("Unknown suffix %r" % suffix)
1628
except (ValueError, IndexError) as e:
2243
1629
raise ValueError(*(e.args))
2244
1630
timevalue += delta
2245
1631
return timevalue
2246
1632
2247
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
2248
1658
def daemon(nochdir = False, noclose = False):
2249
1659
"""See daemon(3). Standard BSD Unix function.
2250
1660
2258
1668
sys.exit()
2259
1669
if not noclose:
2260
1670
# Close all standard open file descriptors
2261
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1671
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2262
1672
if not stat.S_ISCHR(os.fstat(null).st_mode):
2263
raise OSError(errno.ENODEV, "{} not a character device"
2264
.format(os.devnull))
1673
raise OSError(errno.ENODEV,
1674
"%s not a character device"
1675
% os.path.devnull)
2265
1676
os.dup2(null, sys.stdin.fileno())
2266
1677
os.dup2(null, sys.stdout.fileno())
2267
1678
os.dup2(null, sys.stderr.fileno())
2276
1687
2277
1688
parser = argparse.ArgumentParser()
2278
1689
parser.add_argument("-v", "--version", action="version",
2279
version = "%(prog)s {}".format(version),
1690
version = "%%(prog)s %s" % version,
2280
1691
help="show version number and exit")
2281
1692
parser.add_argument("-i", "--interface", metavar="IF",
2282
1693
help="Bind to interface IF")
2288
1699
help="Run self-test")
2289
1700
parser.add_argument("--debug", action="store_true",
2290
1701
help="Debug mode; run in foreground and log"
2291
" to terminal", default=None)
1702
" to terminal")
2292
1703
parser.add_argument("--debuglevel", metavar="LEVEL",
2293
1704
help="Debug level for stdout output")
2294
1705
parser.add_argument("--priority", help="GnuTLS"
2301
1712
" files")
2302
1713
parser.add_argument("--no-dbus", action="store_false",
2303
1714
dest="use_dbus", help="Do not provide D-Bus"
2304
" system bus interface", default=None)
1715
" system bus interface")
2305
1716
parser.add_argument("--no-ipv6", action="store_false",
2306
dest="use_ipv6", help="Do not use IPv6",
2307
default=None)
2308
parser.add_argument("--no-restore", action="store_false",
2309
dest="restore", help="Do not restore stored"
2310
" state", default=None)
2311
parser.add_argument("--socket", type=int,
2312
help="Specify a file descriptor to a network"
2313
" socket to use instead of creating one")
2314
parser.add_argument("--statedir", metavar="DIR",
2315
help="Directory to save/restore state in")
2316
parser.add_argument("--foreground", action="store_true",
2317
help="Run in foreground", default=None)
2318
parser.add_argument("--no-zeroconf", action="store_false",
2319
dest="zeroconf", help="Do not use Zeroconf",
2320
default=None)
2321
1717
dest="use_ipv6", help="Do not use IPv6")
2322
1718
options = parser.parse_args()
2323
1719
2324
1720
if options.check:
2325
1721
import doctest
2326
fail_count, test_count = doctest.testmod()
2327
sys.exit(os.EX_OK if fail_count == 0 else 1)
1722
doctest.testmod()
1723
sys.exit()
2328
1724
2329
1725
# Default values for config file for server-global settings
2330
1726
server_defaults = { "interface": "",
2332
1728
"port": "",
2333
1729
"debug": "False",
2334
1730
"priority":
2335
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1731
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2336
1732
"servicename": "Mandos",
2337
1733
"use_dbus": "True",
2338
1734
"use_ipv6": "True",
2339
1735
"debuglevel": "",
2340
"restore": "True",
2341
"socket": "",
2342
"statedir": "/var/lib/mandos",
2343
"foreground": "False",
2344
"zeroconf": "True",
2345
1736
}
2346
1737
2347
1738
# Parse config file for server-global settings
2352
1743
# Convert the SafeConfigParser object to a dict
2353
1744
server_settings = server_config.defaults()
2354
1745
# Use the appropriate methods on the non-string config options
2355
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1746
for option in ("debug", "use_dbus", "use_ipv6"):
2356
1747
server_settings[option] = server_config.getboolean("DEFAULT",
2357
1748
option)
2358
1749
if server_settings["port"]:
2359
1750
server_settings["port"] = server_config.getint("DEFAULT",
2360
1751
"port")
2361
if server_settings["socket"]:
2362
server_settings["socket"] = server_config.getint("DEFAULT",
2363
"socket")
2364
# Later, stdin will, and stdout and stderr might, be dup'ed
2365
# over with an opened os.devnull. But we don't want this to
2366
# happen with a supplied network socket.
2367
if 0 <= server_settings["socket"] <= 2:
2368
server_settings["socket"] = os.dup(server_settings
2369
["socket"])
2370
1752
del server_config
2371
1753
2372
1754
# Override the settings from the config file with command line
2373
1755
# options, if set.
2374
1756
for option in ("interface", "address", "port", "debug",
2375
1757
"priority", "servicename", "configdir",
2376
"use_dbus", "use_ipv6", "debuglevel", "restore",
2377
"statedir", "socket", "foreground", "zeroconf"):
1758
"use_dbus", "use_ipv6", "debuglevel"):
2378
1759
value = getattr(options, option)
2379
1760
if value is not None:
2380
1761
server_settings[option] = value
2381
1762
del options
2382
1763
# Force all strings to be unicode
2383
1764
for option in server_settings.keys():
2384
if isinstance(server_settings[option], bytes):
2385
server_settings[option] = (server_settings[option]
2386
.decode("utf-8"))
2387
# Force all boolean options to be boolean
2388
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2389
"foreground", "zeroconf"):
2390
server_settings[option] = bool(server_settings[option])
2391
# Debug implies foreground
2392
if server_settings["debug"]:
2393
server_settings["foreground"] = True
1765
if type(server_settings[option]) is str:
1766
server_settings[option] = unicode(server_settings[option])
2394
1767
# Now we have our good server settings in "server_settings"
2395
1768
2396
1769
##################################################################
2397
1770
2398
if (not server_settings["zeroconf"] and
2399
not (server_settings["port"]
2400
or server_settings["socket"] != "")):
2401
parser.error("Needs port or socket to work without"
2402
" Zeroconf")
2403
2404
1771
# For convenience
2405
1772
debug = server_settings["debug"]
2406
1773
debuglevel = server_settings["debuglevel"]
2407
1774
use_dbus = server_settings["use_dbus"]
2408
1775
use_ipv6 = server_settings["use_ipv6"]
2409
stored_state_path = os.path.join(server_settings["statedir"],
2410
stored_state_file)
2411
foreground = server_settings["foreground"]
2412
zeroconf = server_settings["zeroconf"]
2413
2414
if debug:
2415
initlogger(debug, logging.DEBUG)
2416
else:
2417
if not debuglevel:
2418
initlogger(debug)
2419
else:
2420
level = getattr(logging, debuglevel.upper())
2421
initlogger(debug, level)
2422
1776
2423
1777
if server_settings["servicename"] != "Mandos":
2424
1778
syslogger.setFormatter(logging.Formatter
2425
('Mandos ({}) [%(process)d]:'
2426
' %(levelname)s: %(message)s'
2427
.format(server_settings
2428
["servicename"])))
1779
('Mandos (%s) [%%(process)d]:'
1780
' %%(levelname)s: %%(message)s'
1781
% server_settings["servicename"]))
2429
1782
2430
1783
# Parse config file with clients
2431
client_config = configparser.SafeConfigParser(Client
2432
.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)
2433
1793
client_config.read(os.path.join(server_settings["configdir"],
2434
1794
"clients.conf"))
2435
1795
2436
1796
global mandos_dbus_service
2437
1797
mandos_dbus_service = None
2438
1798
2439
socketfd = None
2440
if server_settings["socket"] != "":
2441
socketfd = server_settings["socket"]
2442
1799
tcp_server = MandosServer((server_settings["address"],
2443
1800
server_settings["port"]),
2444
1801
ClientHandler,
2447
1804
use_ipv6=use_ipv6,
2448
1805
gnutls_priority=
2449
1806
server_settings["priority"],
2450
use_dbus=use_dbus,
2451
socketfd=socketfd)
2452
if not foreground:
2453
pidfilename = "/run/mandos.pid"
2454
if not os.path.isdir("/run/."):
2455
pidfilename = "/var/run/mandos.pid"
2456
pidfile = None
1807
use_dbus=use_dbus)
1808
if not debug:
1809
pidfilename = "/var/run/mandos.pid"
2457
1810
try:
2458
1811
pidfile = open(pidfilename, "w")
2459
except IOError as e:
2460
logger.error("Could not open file %r", pidfilename,
2461
exc_info=e)
1812
except IOError:
1813
logger.error("Could not open file %r", pidfilename)
2462
1814
2463
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:
2464
1819
try:
2465
uid = pwd.getpwnam(name).pw_uid
2466
gid = pwd.getpwnam(name).pw_gid
2467
break
1820
uid = pwd.getpwnam("mandos").pw_uid
1821
gid = pwd.getpwnam("mandos").pw_gid
2468
1822
except KeyError:
2469
continue
2470
else:
2471
uid = 65534
2472
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
2473
1829
try:
2474
1830
os.setgid(gid)
2475
1831
os.setuid(uid)
2476
1832
except OSError as error:
2477
if error.errno != errno.EPERM:
2478
raise
1833
if error[0] != errno.EPERM:
1834
raise error
2479
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
2480
1844
if debug:
2481
1845
# Enable all possible GnuTLS debugging
2482
1846
2492
1856
.gnutls_global_set_log_function(debug_gnutls))
2493
1857
2494
1858
# Redirect stdin so all checkers get /dev/null
2495
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1859
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2496
1860
os.dup2(null, sys.stdin.fileno())
2497
1861
if null > 2:
2498
1862
os.close(null)
1863
else:
1864
# No console logging
1865
logger.removeHandler(console)
2499
1866
2500
1867
# Need to fork before connecting to D-Bus
2501
if not foreground:
1868
if not debug:
2502
1869
# Close all input and output, do double fork, etc.
2503
1870
daemon()
2504
1871
2505
# multiprocessing will use threads, so before we use gobject we
2506
# need to inform gobject that threads will be used.
2507
gobject.threads_init()
2508
2509
1872
global main_loop
2510
1873
# From the Avahi example code
2511
DBusGMainLoop(set_as_default=True)
1874
DBusGMainLoop(set_as_default=True )
2512
1875
main_loop = gobject.MainLoop()
2513
1876
bus = dbus.SystemBus()
2514
1877
# End of Avahi example code
2515
1878
if use_dbus:
2516
1879
try:
2517
bus_name = dbus.service.BusName("se.recompile.Mandos",
1880
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2518
1881
bus, do_not_queue=True)
2519
old_bus_name = (dbus.service.BusName
2520
("se.bsnet.fukt.Mandos", bus,
2521
do_not_queue=True))
2522
1882
except dbus.exceptions.NameExistsException as e:
2523
logger.error("Disabling D-Bus:", exc_info=e)
1883
logger.error(unicode(e) + ", disabling D-Bus")
2524
1884
use_dbus = False
2525
1885
server_settings["use_dbus"] = False
2526
1886
tcp_server.use_dbus = False
2527
if zeroconf:
2528
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2529
service = AvahiServiceToSyslog(name =
2530
server_settings["servicename"],
2531
servicetype = "_mandos._tcp",
2532
protocol = protocol, bus = bus)
2533
if server_settings["interface"]:
2534
service.interface = (if_nametoindex
2535
(server_settings["interface"]
2536
.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"])))
2537
1894
2538
1895
global multiprocessing_manager
2539
1896
multiprocessing_manager = multiprocessing.Manager()
2541
1898
client_class = Client
2542
1899
if use_dbus:
2543
1900
client_class = functools.partial(ClientDBus, bus = bus)
2544
2545
client_settings = Client.config_parser(client_config)
2546
old_client_settings = {}
2547
clients_data = {}
2548
2549
# This is used to redirect stdout and stderr for checker processes
2550
global wnull
2551
wnull = open(os.devnull, "w") # A writable /dev/null
2552
# Only used if server is running in foreground but not in debug
2553
# mode
2554
if debug or not foreground:
2555
wnull.close()
2556
2557
# Get client data and settings from last running state.
2558
if server_settings["restore"]:
2559
try:
2560
with open(stored_state_path, "rb") as stored_state:
2561
clients_data, old_client_settings = (pickle.load
2562
(stored_state))
2563
os.remove(stored_state_path)
2564
except IOError as e:
2565
if e.errno == errno.ENOENT:
2566
logger.warning("Could not load persistent state: {}"
2567
.format(os.strerror(e.errno)))
2568
else:
2569
logger.critical("Could not load persistent state:",
2570
exc_info=e)
2571
raise
2572
except EOFError as e:
2573
logger.warning("Could not load persistent state: "
2574
"EOFError:", exc_info=e)
2575
2576
with PGPEngine() as pgp:
2577
for client_name, client in clients_data.items():
2578
# Skip removed clients
2579
if client_name not in client_settings:
2580
continue
2581
2582
# Decide which value to use after restoring saved state.
2583
# We have three different values: Old config file,
2584
# new config file, and saved state.
2585
# New config value takes precedence if it differs from old
2586
# config value, otherwise use saved state.
2587
for name, value in client_settings[client_name].items():
2588
try:
2589
# For each value in new config, check if it
2590
# differs from the old config value (Except for
2591
# the "secret" attribute)
2592
if (name != "secret" and
2593
value != old_client_settings[client_name]
2594
[name]):
2595
client[name] = value
2596
except KeyError:
2597
pass
2598
2599
# Clients who has passed its expire date can still be
2600
# enabled if its last checker was successful. Clients
2601
# whose checker succeeded before we stored its state is
2602
# assumed to have successfully run all checkers during
2603
# downtime.
2604
if client["enabled"]:
2605
if datetime.datetime.utcnow() >= client["expires"]:
2606
if not client["last_checked_ok"]:
2607
logger.warning(
2608
"disabling client {} - Client never "
2609
"performed a successful checker"
2610
.format(client_name))
2611
client["enabled"] = False
2612
elif client["last_checker_status"] != 0:
2613
logger.warning(
2614
"disabling client {} - Client last"
2615
" checker failed with error code {}"
2616
.format(client_name,
2617
client["last_checker_status"]))
2618
client["enabled"] = False
2619
else:
2620
client["expires"] = (datetime.datetime
2621
.utcnow()
2622
+ client["timeout"])
2623
logger.debug("Last checker succeeded,"
2624
" keeping {} enabled"
2625
.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):
2626
1908
try:
2627
client["secret"] = (
2628
pgp.decrypt(client["encrypted_secret"],
2629
client_settings[client_name]
2630
["secret"]))
2631
except PGPError:
2632
# If decryption fails, we use secret from new settings
2633
logger.debug("Failed to decrypt {} old secret"
2634
.format(client_name))
2635
client["secret"] = (
2636
client_settings[client_name]["secret"])
2637
2638
# Add/remove clients based on new changes made to config
2639
for client_name in (set(old_client_settings)
2640
- set(client_settings)):
2641
del clients_data[client_name]
2642
for client_name in (set(client_settings)
2643
- set(old_client_settings)):
2644
clients_data[client_name] = client_settings[client_name]
2645
2646
# Create all client objects
2647
for client_name, client in clients_data.items():
2648
tcp_server.clients[client_name] = client_class(
2649
name = client_name, settings = client,
2650
server_settings = server_settings)
2651
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()))
2652
1918
if not tcp_server.clients:
2653
1919
logger.warning("No clients defined")
2654
2655
if not foreground:
2656
if pidfile is not None:
2657
try:
2658
with pidfile:
2659
pid = os.getpid()
2660
pidfile.write("{}\n".format(pid).encode("utf-8"))
2661
except IOError:
2662
logger.error("Could not write to file %r with PID %d",
2663
pidfilename, pid)
2664
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
2665
1933
del pidfilename
2666
1934
1935
signal.signal(signal.SIGINT, signal.SIG_IGN)
1936
2667
1937
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2668
1938
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2669
1939
2670
1940
if use_dbus:
2671
@alternate_dbus_interfaces({"se.recompile.Mandos":
2672
"se.bsnet.fukt.Mandos"})
2673
class MandosDBusService(DBusObjectWithProperties):
1941
class MandosDBusService(dbus.service.Object):
2674
1942
"""A D-Bus proxy object"""
2675
1943
def __init__(self):
2676
1944
dbus.service.Object.__init__(self, bus, "/")
2677
_interface = "se.recompile.Mandos"
2678
2679
@dbus_interface_annotations(_interface)
2680
def _foo(self):
2681
return { "org.freedesktop.DBus.Property"
2682
".EmitsChangedSignal":
2683
"false"}
1945
_interface = "se.bsnet.fukt.Mandos"
2684
1946
2685
1947
@dbus.service.signal(_interface, signature="o")
2686
1948
def ClientAdded(self, objpath):
2701
1963
def GetAllClients(self):
2702
1964
"D-Bus method"
2703
1965
return dbus.Array(c.dbus_object_path
2704
for c in
2705
tcp_server.clients.itervalues())
1966
for c in tcp_server.clients)
2706
1967
2707
1968
@dbus.service.method(_interface,
2708
1969
out_signature="a{oa{sv}}")
2710
1971
"D-Bus method"
2711
1972
return dbus.Dictionary(
2712
1973
((c.dbus_object_path, c.GetAll(""))
2713
for c in tcp_server.clients.itervalues()),
1974
for c in tcp_server.clients),
2714
1975
signature="oa{sv}")
2715
1976
2716
1977
@dbus.service.method(_interface, in_signature="o")
2717
1978
def RemoveClient(self, object_path):
2718
1979
"D-Bus method"
2719
for c in tcp_server.clients.itervalues():
1980
for c in tcp_server.clients:
2720
1981
if c.dbus_object_path == object_path:
2721
del tcp_server.clients[c.name]
1982
tcp_server.clients.remove(c)
2722
1983
c.remove_from_connection()
2723
1984
# Don't signal anything except ClientRemoved
2724
1985
c.disable(quiet=True)
2733
1994
2734
1995
def cleanup():
2735
1996
"Cleanup function; run on exit"
2736
if zeroconf:
2737
service.cleanup()
2738
2739
multiprocessing.active_children()
2740
wnull.close()
2741
if not (tcp_server.clients or client_settings):
2742
return
2743
2744
# Store client before exiting. Secrets are encrypted with key
2745
# based on what config file has. If config file is
2746
# removed/edited, old secret will thus be unrecovable.
2747
clients = {}
2748
with PGPEngine() as pgp:
2749
for client in tcp_server.clients.itervalues():
2750
key = client_settings[client.name]["secret"]
2751
client.encrypted_secret = pgp.encrypt(client.secret,
2752
key)
2753
client_dict = {}
2754
2755
# A list of attributes that can not be pickled
2756
# + secret.
2757
exclude = { "bus", "changedstate", "secret",
2758
"checker", "server_settings" }
2759
for name, typ in (inspect.getmembers
2760
(dbus.service.Object)):
2761
exclude.add(name)
2762
2763
client_dict["encrypted_secret"] = (client
2764
.encrypted_secret)
2765
for attr in client.client_structure:
2766
if attr not in exclude:
2767
client_dict[attr] = getattr(client, attr)
2768
2769
clients[client.name] = client_dict
2770
del client_settings[client.name]["secret"]
2771
2772
try:
2773
with (tempfile.NamedTemporaryFile
2774
(mode='wb', suffix=".pickle", prefix='clients-',
2775
dir=os.path.dirname(stored_state_path),
2776
delete=False)) as stored_state:
2777
pickle.dump((clients, client_settings), stored_state)
2778
tempname=stored_state.name
2779
os.rename(tempname, stored_state_path)
2780
except (IOError, OSError) as e:
2781
if not debug:
2782
try:
2783
os.remove(tempname)
2784
except NameError:
2785
pass
2786
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2787
logger.warning("Could not save persistent state: {}"
2788
.format(os.strerror(e.errno)))
2789
else:
2790
logger.warning("Could not save persistent state:",
2791
exc_info=e)
2792
raise
2793
2794
# Delete all clients, and settings from config
1997
service.cleanup()
1998
2795
1999
while tcp_server.clients:
2796
name, client = tcp_server.clients.popitem()
2000
client = tcp_server.clients.pop()
2797
2001
if use_dbus:
2798
2002
client.remove_from_connection()
2003
client.disable_hook = None
2799
2004
# Don't signal anything except ClientRemoved
2800
2005
client.disable(quiet=True)
2801
2006
if use_dbus:
2802
2007
# Emit D-Bus signal
2803
mandos_dbus_service.ClientRemoved(client
2804
.dbus_object_path,
2008
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2805
2009
client.name)
2806
client_settings.clear()
2807
2010
2808
2011
atexit.register(cleanup)
2809
2012
2810
for client in tcp_server.clients.itervalues():
2013
for client in tcp_server.clients:
2811
2014
if use_dbus:
2812
2015
# Emit D-Bus signal
2813
2016
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2814
# Need to initiate checking of clients
2815
if client.enabled:
2816
client.init_checker()
2017
client.enable()
2817
2018
2818
2019
tcp_server.enable()
2819
2020
tcp_server.server_activate()
2820
2021
2821
2022
# Find out what port we got
2822
if zeroconf:
2823
service.port = tcp_server.socket.getsockname()[1]
2023
service.port = tcp_server.socket.getsockname()[1]
2824
2024
if use_ipv6:
2825
2025
logger.info("Now listening on address %r, port %d,"
2826
" flowinfo %d, scope_id %d",
2827
*tcp_server.socket.getsockname())
2026
" flowinfo %d, scope_id %d"
2027
% tcp_server.socket.getsockname())
2828
2028
else: # IPv4
2829
logger.info("Now listening on address %r, port %d",
2830
*tcp_server.socket.getsockname())
2029
logger.info("Now listening on address %r, port %d"
2030
% tcp_server.socket.getsockname())
2831
2031
2832
2032
#service.interface = tcp_server.socket.getsockname()[3]
2833
2033
2834
2034
try:
2835
if zeroconf:
2836
# From the Avahi example code
2837
try:
2838
service.activate()
2839
except dbus.exceptions.DBusException as error:
2840
logger.critical("D-Bus Exception", exc_info=error)
2841
cleanup()
2842
sys.exit(1)
2843
# 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
2844
2043
2845
2044
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2846
2045
lambda *args, **kwargs:
2850
2049
logger.debug("Starting main loop")
2851
2050
main_loop.run()
2852
2051
except AvahiError as error:
2853
logger.critical("Avahi Error", exc_info=error)
2052
logger.critical("AvahiError: %s", error)
2854
2053
cleanup()
2855
2054
sys.exit(1)
2856
2055
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0