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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
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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 = "1.6.9"
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"""
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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)
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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
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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_annotations({"org.freedesktop.DBus.Deprecated": "true",
817
"org.freedesktop.DBus.Property."
818
"EmitsChangedSignal": "false"})
819
@dbus_service_property("org.example.Interface", signature="b",
820
access="r")
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")
948
949
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
950
def PropertiesChanged(self, interface_name, changed_properties,
951
invalidated_properties):
952
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
953
standard.
954
"""
955
pass
701
all[name] = type(value)(value, variant_level=
702
value.variant_level+1)
703
return dbus.Dictionary(all, signature="sv")
956
704
957
705
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
958
706
out_signature="s",
959
707
path_keyword='object_path',
960
708
connection_keyword='connection')
961
709
def Introspect(self, object_path, connection):
962
"""Overloading of standard D-Bus method.
963
964
Inserts property tags and interface annotation tags.
710
"""Standard D-Bus method, overloaded to insert property tags.
965
711
"""
966
712
xmlstring = dbus.service.Object.Introspect(self, object_path,
967
713
connection)
974
720
e.setAttribute("access", prop._dbus_access)
975
721
return e
976
722
for if_tag in document.getElementsByTagName("interface"):
977
# Add property tags
978
723
for tag in (make_tag(document, name, prop)
979
724
for name, prop
980
in self._get_all_dbus_things("property")
725
in self._get_all_dbus_properties()
981
726
if prop._dbus_interface
982
727
== if_tag.getAttribute("name")):
983
728
if_tag.appendChild(tag)
984
# Add annotation tags
985
for typ in ("method", "signal", "property"):
986
for tag in if_tag.getElementsByTagName(typ):
987
annots = dict()
988
for name, prop in (self.
989
_get_all_dbus_things(typ)):
990
if (name == tag.getAttribute("name")
991
and prop._dbus_interface
992
== if_tag.getAttribute("name")):
993
annots.update(getattr
994
(prop,
995
"_dbus_annotations",
996
{}))
997
for name, value in annots.items():
998
ann_tag = document.createElement(
999
"annotation")
1000
ann_tag.setAttribute("name", name)
1001
ann_tag.setAttribute("value", value)
1002
tag.appendChild(ann_tag)
1003
# Add interface annotation tags
1004
for annotation, value in dict(
1005
itertools.chain.from_iterable(
1006
annotations().items()
1007
for name, annotations in
1008
self._get_all_dbus_things("interface")
1009
if name == if_tag.getAttribute("name")
1010
)).items():
1011
ann_tag = document.createElement("annotation")
1012
ann_tag.setAttribute("name", annotation)
1013
ann_tag.setAttribute("value", value)
1014
if_tag.appendChild(ann_tag)
1015
729
# Add the names to the return values for the
1016
730
# "org.freedesktop.DBus.Properties" methods
1017
731
if (if_tag.getAttribute("name")
1032
746
except (AttributeError, xml.dom.DOMException,
1033
747
xml.parsers.expat.ExpatError) as error:
1034
748
logger.error("Failed to override Introspection method",
1035
exc_info=error)
749
error)
1036
750
return xmlstring
1037
751
1038
752
1039
def datetime_to_dbus(dt, variant_level=0):
753
def datetime_to_dbus (dt, variant_level=0):
1040
754
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1041
755
if dt is None:
1042
756
return dbus.String("", variant_level = variant_level)
1043
757
return dbus.String(dt.isoformat(),
1044
758
variant_level=variant_level)
1045
759
1046
1047
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1048
"""A class decorator; applied to a subclass of
1049
dbus.service.Object, it will add alternate D-Bus attributes with
1050
interface names according to the "alt_interface_names" mapping.
1051
Usage:
1052
1053
@alternate_dbus_interfaces({"org.example.Interface":
1054
"net.example.AlternateInterface"})
1055
class SampleDBusObject(dbus.service.Object):
1056
@dbus.service.method("org.example.Interface")
1057
def SampleDBusMethod():
1058
pass
1059
1060
The above "SampleDBusMethod" on "SampleDBusObject" will be
1061
reachable via two interfaces: "org.example.Interface" and
1062
"net.example.AlternateInterface", the latter of which will have
1063
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1064
"true", unless "deprecate" is passed with a False value.
1065
1066
This works for methods and signals, and also for D-Bus properties
1067
(from DBusObjectWithProperties) and interfaces (from the
1068
dbus_interface_annotations decorator).
1069
"""
1070
def wrapper(cls):
1071
for orig_interface_name, alt_interface_name in (
1072
alt_interface_names.items()):
1073
attr = {}
1074
interface_names = set()
1075
# Go though all attributes of the class
1076
for attrname, attribute in inspect.getmembers(cls):
1077
# Ignore non-D-Bus attributes, and D-Bus attributes
1078
# with the wrong interface name
1079
if (not hasattr(attribute, "_dbus_interface")
1080
or not attribute._dbus_interface
1081
.startswith(orig_interface_name)):
1082
continue
1083
# Create an alternate D-Bus interface name based on
1084
# the current name
1085
alt_interface = (attribute._dbus_interface
1086
.replace(orig_interface_name,
1087
alt_interface_name))
1088
interface_names.add(alt_interface)
1089
# Is this a D-Bus signal?
1090
if getattr(attribute, "_dbus_is_signal", False):
1091
# Extract the original non-method undecorated
1092
# function by black magic
1093
nonmethod_func = (dict(
1094
zip(attribute.func_code.co_freevars,
1095
attribute.__closure__))["func"]
1096
.cell_contents)
1097
# Create a new, but exactly alike, function
1098
# object, and decorate it to be a new D-Bus signal
1099
# with the alternate D-Bus interface name
1100
new_function = (dbus.service.signal
1101
(alt_interface,
1102
attribute._dbus_signature)
1103
(types.FunctionType(
1104
nonmethod_func.func_code,
1105
nonmethod_func.func_globals,
1106
nonmethod_func.func_name,
1107
nonmethod_func.func_defaults,
1108
nonmethod_func.func_closure)))
1109
# Copy annotations, if any
1110
try:
1111
new_function._dbus_annotations = (
1112
dict(attribute._dbus_annotations))
1113
except AttributeError:
1114
pass
1115
# Define a creator of a function to call both the
1116
# original and alternate functions, so both the
1117
# original and alternate signals gets sent when
1118
# the function is called
1119
def fixscope(func1, func2):
1120
"""This function is a scope container to pass
1121
func1 and func2 to the "call_both" function
1122
outside of its arguments"""
1123
def call_both(*args, **kwargs):
1124
"""This function will emit two D-Bus
1125
signals by calling func1 and func2"""
1126
func1(*args, **kwargs)
1127
func2(*args, **kwargs)
1128
return call_both
1129
# Create the "call_both" function and add it to
1130
# the class
1131
attr[attrname] = fixscope(attribute, new_function)
1132
# Is this a D-Bus method?
1133
elif getattr(attribute, "_dbus_is_method", False):
1134
# Create a new, but exactly alike, function
1135
# object. Decorate it to be a new D-Bus method
1136
# with the alternate D-Bus interface name. Add it
1137
# to the class.
1138
attr[attrname] = (dbus.service.method
1139
(alt_interface,
1140
attribute._dbus_in_signature,
1141
attribute._dbus_out_signature)
1142
(types.FunctionType
1143
(attribute.func_code,
1144
attribute.func_globals,
1145
attribute.func_name,
1146
attribute.func_defaults,
1147
attribute.func_closure)))
1148
# Copy annotations, if any
1149
try:
1150
attr[attrname]._dbus_annotations = (
1151
dict(attribute._dbus_annotations))
1152
except AttributeError:
1153
pass
1154
# Is this a D-Bus property?
1155
elif getattr(attribute, "_dbus_is_property", False):
1156
# Create a new, but exactly alike, function
1157
# object, and decorate it to be a new D-Bus
1158
# property with the alternate D-Bus interface
1159
# name. Add it to the class.
1160
attr[attrname] = (dbus_service_property
1161
(alt_interface,
1162
attribute._dbus_signature,
1163
attribute._dbus_access,
1164
attribute
1165
._dbus_get_args_options
1166
["byte_arrays"])
1167
(types.FunctionType
1168
(attribute.func_code,
1169
attribute.func_globals,
1170
attribute.func_name,
1171
attribute.func_defaults,
1172
attribute.func_closure)))
1173
# Copy annotations, if any
1174
try:
1175
attr[attrname]._dbus_annotations = (
1176
dict(attribute._dbus_annotations))
1177
except AttributeError:
1178
pass
1179
# Is this a D-Bus interface?
1180
elif getattr(attribute, "_dbus_is_interface", False):
1181
# Create a new, but exactly alike, function
1182
# object. Decorate it to be a new D-Bus interface
1183
# with the alternate D-Bus interface name. Add it
1184
# to the class.
1185
attr[attrname] = (dbus_interface_annotations
1186
(alt_interface)
1187
(types.FunctionType
1188
(attribute.func_code,
1189
attribute.func_globals,
1190
attribute.func_name,
1191
attribute.func_defaults,
1192
attribute.func_closure)))
1193
if deprecate:
1194
# Deprecate all alternate interfaces
1195
iname="_AlternateDBusNames_interface_annotation{}"
1196
for interface_name in interface_names:
1197
@dbus_interface_annotations(interface_name)
1198
def func(self):
1199
return { "org.freedesktop.DBus.Deprecated":
1200
"true" }
1201
# Find an unused name
1202
for aname in (iname.format(i)
1203
for i in itertools.count()):
1204
if aname not in attr:
1205
attr[aname] = func
1206
break
1207
if interface_names:
1208
# Replace the class with a new subclass of it with
1209
# methods, signals, etc. as created above.
1210
cls = type(b"{}Alternate".format(cls.__name__),
1211
(cls,), attr)
1212
return cls
1213
return wrapper
1214
1215
1216
@alternate_dbus_interfaces({"se.recompile.Mandos":
1217
"se.bsnet.fukt.Mandos"})
1218
760
class ClientDBus(Client, DBusObjectWithProperties):
1219
761
"""A Client class using D-Bus
1220
762
1226
768
runtime_expansions = (Client.runtime_expansions
1227
769
+ ("dbus_object_path",))
1228
770
1229
_interface = "se.recompile.Mandos.Client"
1230
1231
771
# dbus.service.Object doesn't use super(), so we can't either.
1232
772
1233
773
def __init__(self, bus = None, *args, **kwargs):
774
self._approvals_pending = 0
1234
775
self.bus = bus
1235
776
Client.__init__(self, *args, **kwargs)
1236
777
# Only now, when this client is initialized, can it show up on
1237
778
# the D-Bus
1238
client_object_name = str(self.name).translate(
779
client_object_name = unicode(self.name).translate(
1239
780
{ord("."): ord("_"),
1240
781
ord("-"): ord("_")})
1241
782
self.dbus_object_path = (dbus.ObjectPath
1242
783
("/clients/" + client_object_name))
1243
784
DBusObjectWithProperties.__init__(self, self.bus,
1244
785
self.dbus_object_path)
1245
786
1246
787
def notifychangeproperty(transform_func,
1247
788
dbus_name, type_func=lambda x: x,
1248
variant_level=1, invalidate_only=False,
1249
_interface=_interface):
1250
""" Modify a variable so that it's a property which announces
1251
its changes to DBus.
1252
1253
transform_fun: Function that takes a value and a variant_level
1254
and transforms it to a D-Bus type.
1255
dbus_name: D-Bus name of the variable
789
variant_level=1):
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
1256
795
type_func: Function that transform the value before sending it
1257
to the D-Bus. Default: no transform
1258
variant_level: D-Bus variant level. Default: 1
796
to DBus
797
variant_level: DBus variant level. default: 1
1259
798
"""
1260
attrname = "_{}".format(dbus_name)
799
real_value = [None,]
1261
800
def setter(self, value):
801
old_value = real_value[0]
802
real_value[0] = value
1262
803
if hasattr(self, "dbus_object_path"):
1263
if (not hasattr(self, attrname) or
1264
type_func(getattr(self, attrname, None))
1265
!= type_func(value)):
1266
if invalidate_only:
1267
self.PropertiesChanged(_interface,
1268
dbus.Dictionary(),
1269
dbus.Array
1270
((dbus_name,)))
1271
else:
1272
dbus_value = transform_func(type_func(value),
1273
variant_level
1274
=variant_level)
1275
self.PropertyChanged(dbus.String(dbus_name),
1276
dbus_value)
1277
self.PropertiesChanged(_interface,
1278
dbus.Dictionary({
1279
dbus.String(dbus_name):
1280
dbus_value }), dbus.Array())
1281
setattr(self, attrname, value)
1282
1283
return property(lambda self: getattr(self, attrname), setter)
1284
804
if type_func(old_value) != type_func(real_value[0]):
805
dbus_value = transform_func(type_func(real_value[0]),
806
variant_level)
807
self.PropertyChanged(dbus.String(dbus_name),
808
dbus_value)
809
810
return property(lambda self: real_value[0], setter)
811
812
1285
813
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1286
814
approvals_pending = notifychangeproperty(dbus.Boolean,
1287
815
"ApprovalPending",
1290
818
last_enabled = notifychangeproperty(datetime_to_dbus,
1291
819
"LastEnabled")
1292
820
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1293
type_func = lambda checker:
1294
checker is not None)
821
type_func = lambda checker: checker is not None)
1295
822
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1296
823
"LastCheckedOK")
1297
last_checker_status = notifychangeproperty(dbus.Int16,
1298
"LastCheckerStatus")
1299
last_approval_request = notifychangeproperty(
1300
datetime_to_dbus, "LastApprovalRequest")
824
last_approval_request = notifychangeproperty(datetime_to_dbus,
825
"LastApprovalRequest")
1301
826
approved_by_default = notifychangeproperty(dbus.Boolean,
1302
827
"ApprovedByDefault")
1303
approval_delay = notifychangeproperty(dbus.UInt64,
1304
"ApprovalDelay",
1305
type_func =
1306
lambda td: td.total_seconds()
1307
* 1000)
1308
approval_duration = notifychangeproperty(
1309
dbus.UInt64, "ApprovalDuration",
1310
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)
1311
832
host = notifychangeproperty(dbus.String, "Host")
1312
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1313
type_func = lambda td:
1314
td.total_seconds() * 1000)
1315
extended_timeout = notifychangeproperty(
1316
dbus.UInt64, "ExtendedTimeout",
1317
type_func = lambda td: td.total_seconds() * 1000)
1318
interval = notifychangeproperty(dbus.UInt64,
1319
"Interval",
1320
type_func =
1321
lambda td: td.total_seconds()
1322
* 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)
1323
839
checker_command = notifychangeproperty(dbus.String, "Checker")
1324
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1325
invalidate_only=True)
1326
840
1327
841
del notifychangeproperty
1328
842
1353
867
1354
868
return Client.checker_callback(self, pid, condition, command,
1355
869
*args, **kwargs)
1356
870
1357
871
def start_checker(self, *args, **kwargs):
1358
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
1359
877
r = Client.start_checker(self, *args, **kwargs)
1360
878
# Only if new checker process was started
1361
879
if (self.checker is not None
1365
883
return r
1366
884
1367
885
def _reset_approved(self):
1368
self.approved = None
886
self._approved = None
1369
887
return False
1370
888
1371
889
def approve(self, value=True):
1372
self.approved = value
1373
gobject.timeout_add(int(self.approval_duration.total_seconds()
1374
* 1000), self._reset_approved)
1375
890
self.send_changedstate()
891
self._approved = value
892
gobject.timeout_add(_timedelta_to_milliseconds
893
(self.approval_duration),
894
self._reset_approved)
895
1376
896
1377
897
## D-Bus methods, signals & properties
1378
1379
## Interfaces
898
_interface = "se.bsnet.fukt.Mandos.Client"
1380
899
1381
900
## Signals
1382
901
1393
912
pass
1394
913
1395
914
# PropertyChanged - signal
1396
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1397
915
@dbus.service.signal(_interface, signature="sv")
1398
916
def PropertyChanged(self, property, value):
1399
917
"D-Bus signal"
1475
993
access="readwrite")
1476
994
def ApprovalDelay_dbus_property(self, value=None):
1477
995
if value is None: # get
1478
return dbus.UInt64(self.approval_delay.total_seconds()
1479
* 1000)
996
return dbus.UInt64(self.approval_delay_milliseconds())
1480
997
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1481
998
1482
999
# ApprovalDuration - property
1484
1001
access="readwrite")
1485
1002
def ApprovalDuration_dbus_property(self, value=None):
1486
1003
if value is None: # get
1487
return dbus.UInt64(self.approval_duration.total_seconds()
1488
* 1000)
1004
return dbus.UInt64(_timedelta_to_milliseconds(
1005
self.approval_duration))
1489
1006
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1490
1007
1491
1008
# Name - property
1504
1021
def Host_dbus_property(self, value=None):
1505
1022
if value is None: # get
1506
1023
return dbus.String(self.host)
1507
self.host = str(value)
1024
self.host = value
1508
1025
1509
1026
# Created - property
1510
1027
@dbus_service_property(_interface, signature="s", access="read")
1511
1028
def Created_dbus_property(self):
1512
return datetime_to_dbus(self.created)
1029
return dbus.String(datetime_to_dbus(self.created))
1513
1030
1514
1031
# LastEnabled - property
1515
1032
@dbus_service_property(_interface, signature="s", access="read")
1536
1053
return
1537
1054
return datetime_to_dbus(self.last_checked_ok)
1538
1055
1539
# LastCheckerStatus - property
1540
@dbus_service_property(_interface, signature="n",
1541
access="read")
1542
def LastCheckerStatus_dbus_property(self):
1543
return dbus.Int16(self.last_checker_status)
1544
1545
1056
# Expires - property
1546
1057
@dbus_service_property(_interface, signature="s", access="read")
1547
1058
def Expires_dbus_property(self):
1557
1068
access="readwrite")
1558
1069
def Timeout_dbus_property(self, value=None):
1559
1070
if value is None: # get
1560
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1561
old_timeout = self.timeout
1071
return dbus.UInt64(self.timeout_milliseconds())
1562
1072
self.timeout = datetime.timedelta(0, 0, 0, value)
1563
# Reschedule disabling
1564
if self.enabled:
1565
now = datetime.datetime.utcnow()
1566
self.expires += self.timeout - old_timeout
1567
if self.expires <= now:
1568
# The timeout has passed
1569
self.disable()
1570
else:
1571
if (getattr(self, "disable_initiator_tag", None)
1572
is None):
1573
return
1574
gobject.source_remove(self.disable_initiator_tag)
1575
self.disable_initiator_tag = (
1576
gobject.timeout_add(
1577
int((self.expires - now).total_seconds()
1578
* 1000), self.disable))
1579
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
1580
1094
# ExtendedTimeout - property
1581
1095
@dbus_service_property(_interface, signature="t",
1582
1096
access="readwrite")
1583
1097
def ExtendedTimeout_dbus_property(self, value=None):
1584
1098
if value is None: # get
1585
return dbus.UInt64(self.extended_timeout.total_seconds()
1586
* 1000)
1099
return dbus.UInt64(self.extended_timeout_milliseconds())
1587
1100
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1588
1101
1589
1102
# Interval - property
1590
1103
@dbus_service_property(_interface, signature="t",
1591
1104
access="readwrite")
1592
1105
def Interval_dbus_property(self, value=None):
1593
1106
if value is None: # get
1594
return dbus.UInt64(self.interval.total_seconds() * 1000)
1107
return dbus.UInt64(self.interval_milliseconds())
1595
1108
self.interval = datetime.timedelta(0, 0, 0, value)
1596
1109
if getattr(self, "checker_initiator_tag", None) is None:
1597
1110
return
1598
if self.enabled:
1599
# Reschedule checker run
1600
gobject.source_remove(self.checker_initiator_tag)
1601
self.checker_initiator_tag = (gobject.timeout_add
1602
(value, self.start_checker))
1603
self.start_checker() # Start one now, too
1604
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
1605
1117
# Checker - property
1606
1118
@dbus_service_property(_interface, signature="s",
1607
1119
access="readwrite")
1608
1120
def Checker_dbus_property(self, value=None):
1609
1121
if value is None: # get
1610
1122
return dbus.String(self.checker_command)
1611
self.checker_command = str(value)
1123
self.checker_command = value
1612
1124
1613
1125
# CheckerRunning - property
1614
1126
@dbus_service_property(_interface, signature="b",
1630
1142
@dbus_service_property(_interface, signature="ay",
1631
1143
access="write", byte_arrays=True)
1632
1144
def Secret_dbus_property(self, value):
1633
self.secret = bytes(value)
1145
self.secret = str(value)
1634
1146
1635
1147
del _interface
1636
1148
1641
1153
self._pipe.send(('init', fpr, address))
1642
1154
if not self._pipe.recv():
1643
1155
raise KeyError()
1644
1156
1645
1157
def __getattribute__(self, name):
1646
if name == '_pipe':
1158
if(name == '_pipe'):
1647
1159
return super(ProxyClient, self).__getattribute__(name)
1648
1160
self._pipe.send(('getattr', name))
1649
1161
data = self._pipe.recv()
1654
1166
self._pipe.send(('funcall', name, args, kwargs))
1655
1167
return self._pipe.recv()[1]
1656
1168
return func
1657
1169
1658
1170
def __setattr__(self, name, value):
1659
if name == '_pipe':
1171
if(name == '_pipe'):
1660
1172
return super(ProxyClient, self).__setattr__(name, value)
1661
1173
self._pipe.send(('setattr', name, value))
1662
1174
1670
1182
def handle(self):
1671
1183
with contextlib.closing(self.server.child_pipe) as child_pipe:
1672
1184
logger.info("TCP connection from: %s",
1673
str(self.client_address))
1185
unicode(self.client_address))
1674
1186
logger.debug("Pipe FD: %d",
1675
1187
self.server.child_pipe.fileno())
1676
1188
1677
1189
session = (gnutls.connection
1678
1190
.ClientSession(self.request,
1679
1191
gnutls.connection
1680
1192
.X509Credentials()))
1681
1193
1682
1194
# Note: gnutls.connection.X509Credentials is really a
1683
1195
# generic GnuTLS certificate credentials object so long as
1684
1196
# no X.509 keys are added to it. Therefore, we can use it
1685
1197
# here despite using OpenPGP certificates.
1686
1198
1687
1199
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1688
1200
# "+AES-256-CBC", "+SHA1",
1689
1201
# "+COMP-NULL", "+CTYPE-OPENPGP",
1695
1207
(gnutls.library.functions
1696
1208
.gnutls_priority_set_direct(session._c_object,
1697
1209
priority, None))
1698
1210
1699
1211
# Start communication using the Mandos protocol
1700
1212
# Get protocol number
1701
1213
line = self.request.makefile().readline()
1702
1214
logger.debug("Protocol version: %r", line)
1703
1215
try:
1704
1216
if int(line.strip().split()[0]) > 1:
1705
raise RuntimeError(line)
1217
raise RuntimeError
1706
1218
except (ValueError, IndexError, RuntimeError) as error:
1707
1219
logger.error("Unknown protocol version: %s", error)
1708
1220
return
1709
1221
1710
1222
# Start GnuTLS connection
1711
1223
try:
1712
1224
session.handshake()
1716
1228
# established. Just abandon the request.
1717
1229
return
1718
1230
logger.debug("Handshake succeeded")
1719
1231
1720
1232
approval_required = False
1721
1233
try:
1722
1234
try:
1727
1239
logger.warning("Bad certificate: %s", error)
1728
1240
return
1729
1241
logger.debug("Fingerprint: %s", fpr)
1730
1242
1731
1243
try:
1732
1244
client = ProxyClient(child_pipe, fpr,
1733
1245
self.client_address)
1745
1257
client.name)
1746
1258
if self.server.use_dbus:
1747
1259
# Emit D-Bus signal
1748
client.Rejected("Disabled")
1260
client.Rejected("Disabled")
1749
1261
return
1750
1262
1751
if client.approved or not client.approval_delay:
1263
if client._approved or not client.approval_delay:
1752
1264
#We are approved or approval is disabled
1753
1265
break
1754
elif client.approved is None:
1266
elif client._approved is None:
1755
1267
logger.info("Client %s needs approval",
1756
1268
client.name)
1757
1269
if self.server.use_dbus:
1758
1270
# Emit D-Bus signal
1759
1271
client.NeedApproval(
1760
client.approval_delay.total_seconds()
1761
* 1000, client.approved_by_default)
1272
client.approval_delay_milliseconds(),
1273
client.approved_by_default)
1762
1274
else:
1763
1275
logger.warning("Client %s was not approved",
1764
1276
client.name)
1768
1280
return
1769
1281
1770
1282
#wait until timeout or approved
1283
#x = float(client._timedelta_to_milliseconds(delay))
1771
1284
time = datetime.datetime.now()
1772
1285
client.changedstate.acquire()
1773
client.changedstate.wait(delay.total_seconds())
1286
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1774
1287
client.changedstate.release()
1775
1288
time2 = datetime.datetime.now()
1776
1289
if (time2 - time) >= delay:
1792
1305
try:
1793
1306
sent = session.send(client.secret[sent_size:])
1794
1307
except gnutls.errors.GNUTLSError as error:
1795
logger.warning("gnutls send failed",
1796
exc_info=error)
1308
logger.warning("gnutls send failed")
1797
1309
return
1798
1310
logger.debug("Sent: %d, remaining: %d",
1799
1311
sent, len(client.secret)
1800
1312
- (sent_size + sent))
1801
1313
sent_size += sent
1802
1314
1803
1315
logger.info("Sending secret to %s", client.name)
1804
# bump the timeout using extended_timeout
1805
client.bump_timeout(client.extended_timeout)
1316
# bump the timeout as if seen
1317
client.checked_ok(client.extended_timeout)
1806
1318
if self.server.use_dbus:
1807
1319
# Emit D-Bus signal
1808
1320
client.GotSecret()
1813
1325
try:
1814
1326
session.bye()
1815
1327
except gnutls.errors.GNUTLSError as error:
1816
logger.warning("GnuTLS bye failed",
1817
exc_info=error)
1328
logger.warning("GnuTLS bye failed")
1818
1329
1819
1330
@staticmethod
1820
1331
def peer_certificate(session):
1876
1387
# Convert the buffer to a Python bytestring
1877
1388
fpr = ctypes.string_at(buf, buf_len.value)
1878
1389
# Convert the bytestring to hexadecimal notation
1879
hex_fpr = binascii.hexlify(fpr).upper()
1390
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1880
1391
return hex_fpr
1881
1392
1882
1393
1885
1396
def sub_process_main(self, request, address):
1886
1397
try:
1887
1398
self.finish_request(request, address)
1888
except Exception:
1399
except:
1889
1400
self.handle_error(request, address)
1890
1401
self.close_request(request)
1891
1402
1892
1403
def process_request(self, request, address):
1893
1404
"""Start a new process to process the request."""
1894
proc = multiprocessing.Process(target = self.sub_process_main,
1895
args = (request, address))
1896
proc.start()
1897
return proc
1898
1405
multiprocessing.Process(target = self.sub_process_main,
1406
args = (request, address)).start()
1899
1407
1900
1408
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1901
1409
""" adds a pipe to the MixIn """
1905
1413
This function creates a new pipe in self.pipe
1906
1414
"""
1907
1415
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1908
1909
proc = MultiprocessingMixIn.process_request(self, request,
1910
client_address)
1416
1417
super(MultiprocessingMixInWithPipe,
1418
self).process_request(request, client_address)
1911
1419
self.child_pipe.close()
1912
self.add_pipe(parent_pipe, proc)
1913
1914
def add_pipe(self, parent_pipe, proc):
1420
self.add_pipe(parent_pipe)
1421
1422
def add_pipe(self, parent_pipe):
1915
1423
"""Dummy function; override as necessary"""
1916
raise NotImplementedError()
1917
1424
raise NotImplementedError
1918
1425
1919
1426
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1920
1427
socketserver.TCPServer, object):
1926
1433
use_ipv6: Boolean; to use IPv6 or not
1927
1434
"""
1928
1435
def __init__(self, server_address, RequestHandlerClass,
1929
interface=None, use_ipv6=True, socketfd=None):
1930
"""If socketfd is set, use that file descriptor instead of
1931
creating a new one with socket.socket().
1932
"""
1436
interface=None, use_ipv6=True):
1933
1437
self.interface = interface
1934
1438
if use_ipv6:
1935
1439
self.address_family = socket.AF_INET6
1936
if socketfd is not None:
1937
# Save the file descriptor
1938
self.socketfd = socketfd
1939
# Save the original socket.socket() function
1940
self.socket_socket = socket.socket
1941
# To implement --socket, we monkey patch socket.socket.
1942
#
1943
# (When socketserver.TCPServer is a new-style class, we
1944
# could make self.socket into a property instead of monkey
1945
# patching socket.socket.)
1946
#
1947
# Create a one-time-only replacement for socket.socket()
1948
@functools.wraps(socket.socket)
1949
def socket_wrapper(*args, **kwargs):
1950
# Restore original function so subsequent calls are
1951
# not affected.
1952
socket.socket = self.socket_socket
1953
del self.socket_socket
1954
# This time only, return a new socket object from the
1955
# saved file descriptor.
1956
return socket.fromfd(self.socketfd, *args, **kwargs)
1957
# Replace socket.socket() function with wrapper
1958
socket.socket = socket_wrapper
1959
# The socketserver.TCPServer.__init__ will call
1960
# socket.socket(), which might be our replacement,
1961
# socket_wrapper(), if socketfd was set.
1962
1440
socketserver.TCPServer.__init__(self, server_address,
1963
1441
RequestHandlerClass)
1964
1965
1442
def server_bind(self):
1966
1443
"""This overrides the normal server_bind() function
1967
1444
to bind to an interface if one was specified, and also NOT to
1975
1452
try:
1976
1453
self.socket.setsockopt(socket.SOL_SOCKET,
1977
1454
SO_BINDTODEVICE,
1978
(self.interface + "\0")
1979
.encode("utf-8"))
1455
str(self.interface
1456
+ '\0'))
1980
1457
except socket.error as error:
1981
if error.errno == errno.EPERM:
1982
logger.error("No permission to bind to"
1983
" interface %s", self.interface)
1984
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:
1985
1463
logger.error("SO_BINDTODEVICE not available;"
1986
1464
" cannot bind to interface %s",
1987
1465
self.interface)
1988
elif error.errno == errno.ENODEV:
1989
logger.error("Interface %s does not exist,"
1990
" cannot bind", self.interface)
1991
1466
else:
1992
1467
raise
1993
1468
# Only bind(2) the socket if we really need to.
1996
1471
if self.address_family == socket.AF_INET6:
1997
1472
any_address = "::" # in6addr_any
1998
1473
else:
1999
any_address = "0.0.0.0" # INADDR_ANY
1474
any_address = socket.INADDR_ANY
2000
1475
self.server_address = (any_address,
2001
1476
self.server_address[1])
2002
1477
elif not self.server_address[1]:
2023
1498
"""
2024
1499
def __init__(self, server_address, RequestHandlerClass,
2025
1500
interface=None, use_ipv6=True, clients=None,
2026
gnutls_priority=None, use_dbus=True, socketfd=None):
1501
gnutls_priority=None, use_dbus=True):
2027
1502
self.enabled = False
2028
1503
self.clients = clients
2029
1504
if self.clients is None:
2030
self.clients = {}
1505
self.clients = set()
2031
1506
self.use_dbus = use_dbus
2032
1507
self.gnutls_priority = gnutls_priority
2033
1508
IPv6_TCPServer.__init__(self, server_address,
2034
1509
RequestHandlerClass,
2035
1510
interface = interface,
2036
use_ipv6 = use_ipv6,
2037
socketfd = socketfd)
1511
use_ipv6 = use_ipv6)
2038
1512
def server_activate(self):
2039
1513
if self.enabled:
2040
1514
return socketserver.TCPServer.server_activate(self)
2041
2042
1515
def enable(self):
2043
1516
self.enabled = True
2044
2045
def add_pipe(self, parent_pipe, proc):
1517
def add_pipe(self, parent_pipe):
2046
1518
# Call "handle_ipc" for both data and EOF events
2047
1519
gobject.io_add_watch(parent_pipe.fileno(),
2048
1520
gobject.IO_IN | gobject.IO_HUP,
2049
1521
functools.partial(self.handle_ipc,
2050
parent_pipe =
2051
parent_pipe,
2052
proc = proc))
2053
1522
parent_pipe = parent_pipe))
1523
2054
1524
def handle_ipc(self, source, condition, parent_pipe=None,
2055
proc = None, client_object=None):
2056
# error, or the other end of multiprocessing.Pipe has closed
2057
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2058
# Wait for other process to exit
2059
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):
2060
1542
return False
2061
1543
2062
1544
# Read a request from the child
2067
1549
fpr = request[1]
2068
1550
address = request[2]
2069
1551
2070
for c in self.clients.itervalues():
1552
for c in self.clients:
2071
1553
if c.fingerprint == fpr:
2072
1554
client = c
2073
1555
break
2076
1558
"dress: %s", fpr, address)
2077
1559
if self.use_dbus:
2078
1560
# Emit D-Bus signal
2079
mandos_dbus_service.ClientNotFound(fpr,
2080
address[0])
1561
mandos_dbus_service.ClientNotFound(fpr, address[0])
2081
1562
parent_pipe.send(False)
2082
1563
return False
2083
1564
2084
1565
gobject.io_add_watch(parent_pipe.fileno(),
2085
1566
gobject.IO_IN | gobject.IO_HUP,
2086
1567
functools.partial(self.handle_ipc,
2087
parent_pipe =
2088
parent_pipe,
2089
proc = proc,
2090
client_object =
2091
client))
1568
parent_pipe = parent_pipe,
1569
client_object = client))
2092
1570
parent_pipe.send(True)
2093
# remove the old hook in favor of the new above hook on
2094
# same fileno
1571
# remove the old hook in favor of the new above hook on same fileno
2095
1572
return False
2096
1573
if command == 'funcall':
2097
1574
funcname = request[1]
2098
1575
args = request[2]
2099
1576
kwargs = request[3]
2100
1577
2101
parent_pipe.send(('data', getattr(client_object,
2102
funcname)(*args,
2103
**kwargs)))
2104
1578
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1579
2105
1580
if command == 'getattr':
2106
1581
attrname = request[1]
2107
1582
if callable(client_object.__getattribute__(attrname)):
2108
1583
parent_pipe.send(('function',))
2109
1584
else:
2110
parent_pipe.send(('data', client_object
2111
.__getattribute__(attrname)))
1585
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2112
1586
2113
1587
if command == 'setattr':
2114
1588
attrname = request[1]
2115
1589
value = request[2]
2116
1590
setattr(client_object, attrname, value)
2117
1591
2118
1592
return True
2119
1593
2120
1594
2121
def rfc3339_duration_to_delta(duration):
2122
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2123
2124
>>> rfc3339_duration_to_delta("P7D")
2125
datetime.timedelta(7)
2126
>>> rfc3339_duration_to_delta("PT60S")
2127
datetime.timedelta(0, 60)
2128
>>> rfc3339_duration_to_delta("PT60M")
2129
datetime.timedelta(0, 3600)
2130
>>> rfc3339_duration_to_delta("PT24H")
2131
datetime.timedelta(1)
2132
>>> rfc3339_duration_to_delta("P1W")
2133
datetime.timedelta(7)
2134
>>> rfc3339_duration_to_delta("PT5M30S")
2135
datetime.timedelta(0, 330)
2136
>>> rfc3339_duration_to_delta("P1DT3M20S")
2137
datetime.timedelta(1, 200)
2138
"""
2139
2140
# Parsing an RFC 3339 duration with regular expressions is not
2141
# possible - there would have to be multiple places for the same
2142
# values, like seconds. The current code, while more esoteric, is
2143
# cleaner without depending on a parsing library. If Python had a
2144
# built-in library for parsing we would use it, but we'd like to
2145
# avoid excessive use of external libraries.
2146
2147
# New type for defining tokens, syntax, and semantics all-in-one
2148
Token = collections.namedtuple("Token",
2149
("regexp", # To match token; if
2150
# "value" is not None,
2151
# must have a "group"
2152
# containing digits
2153
"value", # datetime.timedelta or
2154
# None
2155
"followers")) # Tokens valid after
2156
# this token
2157
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2158
# the "duration" ABNF definition in RFC 3339, Appendix A.
2159
token_end = Token(re.compile(r"$"), None, frozenset())
2160
token_second = Token(re.compile(r"(\d+)S"),
2161
datetime.timedelta(seconds=1),
2162
frozenset((token_end,)))
2163
token_minute = Token(re.compile(r"(\d+)M"),
2164
datetime.timedelta(minutes=1),
2165
frozenset((token_second, token_end)))
2166
token_hour = Token(re.compile(r"(\d+)H"),
2167
datetime.timedelta(hours=1),
2168
frozenset((token_minute, token_end)))
2169
token_time = Token(re.compile(r"T"),
2170
None,
2171
frozenset((token_hour, token_minute,
2172
token_second)))
2173
token_day = Token(re.compile(r"(\d+)D"),
2174
datetime.timedelta(days=1),
2175
frozenset((token_time, token_end)))
2176
token_month = Token(re.compile(r"(\d+)M"),
2177
datetime.timedelta(weeks=4),
2178
frozenset((token_day, token_end)))
2179
token_year = Token(re.compile(r"(\d+)Y"),
2180
datetime.timedelta(weeks=52),
2181
frozenset((token_month, token_end)))
2182
token_week = Token(re.compile(r"(\d+)W"),
2183
datetime.timedelta(weeks=1),
2184
frozenset((token_end,)))
2185
token_duration = Token(re.compile(r"P"), None,
2186
frozenset((token_year, token_month,
2187
token_day, token_time,
2188
token_week)))
2189
# Define starting values
2190
value = datetime.timedelta() # Value so far
2191
found_token = None
2192
followers = frozenset((token_duration,)) # Following valid tokens
2193
s = duration # String left to parse
2194
# Loop until end token is found
2195
while found_token is not token_end:
2196
# Search for any currently valid tokens
2197
for token in followers:
2198
match = token.regexp.match(s)
2199
if match is not None:
2200
# Token found
2201
if token.value is not None:
2202
# Value found, parse digits
2203
factor = int(match.group(1), 10)
2204
# Add to value so far
2205
value += factor * token.value
2206
# Strip token from string
2207
s = token.regexp.sub("", s, 1)
2208
# Go to found token
2209
found_token = token
2210
# Set valid next tokens
2211
followers = found_token.followers
2212
break
2213
else:
2214
# No currently valid tokens were found
2215
raise ValueError("Invalid RFC 3339 duration")
2216
# End token found
2217
return value
2218
2219
2220
1595
def string_to_delta(interval):
2221
1596
"""Parse a string and return a datetime.timedelta
2222
1597
2233
1608
>>> string_to_delta('5m 30s')
2234
1609
datetime.timedelta(0, 330)
2235
1610
"""
2236
2237
try:
2238
return rfc3339_duration_to_delta(interval)
2239
except ValueError:
2240
pass
2241
2242
1611
timevalue = datetime.timedelta(0)
2243
1612
for s in interval.split():
2244
1613
try:
2245
suffix = s[-1]
1614
suffix = unicode(s[-1])
2246
1615
value = int(s[:-1])
2247
1616
if suffix == "d":
2248
1617
delta = datetime.timedelta(value)
2255
1624
elif suffix == "w":
2256
1625
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2257
1626
else:
2258
raise ValueError("Unknown suffix {!r}"
2259
.format(suffix))
2260
except IndexError as e:
1627
raise ValueError("Unknown suffix %r" % suffix)
1628
except (ValueError, IndexError) as e:
2261
1629
raise ValueError(*(e.args))
2262
1630
timevalue += delta
2263
1631
return timevalue
2264
1632
2265
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
2266
1658
def daemon(nochdir = False, noclose = False):
2267
1659
"""See daemon(3). Standard BSD Unix function.
2268
1660
2276
1668
sys.exit()
2277
1669
if not noclose:
2278
1670
# Close all standard open file descriptors
2279
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1671
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2280
1672
if not stat.S_ISCHR(os.fstat(null).st_mode):
2281
raise OSError(errno.ENODEV, "{} not a character device"
2282
.format(os.devnull))
1673
raise OSError(errno.ENODEV,
1674
"%s not a character device"
1675
% os.path.devnull)
2283
1676
os.dup2(null, sys.stdin.fileno())
2284
1677
os.dup2(null, sys.stdout.fileno())
2285
1678
os.dup2(null, sys.stderr.fileno())
2294
1687
2295
1688
parser = argparse.ArgumentParser()
2296
1689
parser.add_argument("-v", "--version", action="version",
2297
version = "%(prog)s {}".format(version),
1690
version = "%%(prog)s %s" % version,
2298
1691
help="show version number and exit")
2299
1692
parser.add_argument("-i", "--interface", metavar="IF",
2300
1693
help="Bind to interface IF")
2306
1699
help="Run self-test")
2307
1700
parser.add_argument("--debug", action="store_true",
2308
1701
help="Debug mode; run in foreground and log"
2309
" to terminal", default=None)
1702
" to terminal")
2310
1703
parser.add_argument("--debuglevel", metavar="LEVEL",
2311
1704
help="Debug level for stdout output")
2312
1705
parser.add_argument("--priority", help="GnuTLS"
2319
1712
" files")
2320
1713
parser.add_argument("--no-dbus", action="store_false",
2321
1714
dest="use_dbus", help="Do not provide D-Bus"
2322
" system bus interface", default=None)
1715
" system bus interface")
2323
1716
parser.add_argument("--no-ipv6", action="store_false",
2324
dest="use_ipv6", help="Do not use IPv6",
2325
default=None)
2326
parser.add_argument("--no-restore", action="store_false",
2327
dest="restore", help="Do not restore stored"
2328
" state", default=None)
2329
parser.add_argument("--socket", type=int,
2330
help="Specify a file descriptor to a network"
2331
" socket to use instead of creating one")
2332
parser.add_argument("--statedir", metavar="DIR",
2333
help="Directory to save/restore state in")
2334
parser.add_argument("--foreground", action="store_true",
2335
help="Run in foreground", default=None)
2336
parser.add_argument("--no-zeroconf", action="store_false",
2337
dest="zeroconf", help="Do not use Zeroconf",
2338
default=None)
2339
1717
dest="use_ipv6", help="Do not use IPv6")
2340
1718
options = parser.parse_args()
2341
1719
2342
1720
if options.check:
2343
1721
import doctest
2344
fail_count, test_count = doctest.testmod()
2345
sys.exit(os.EX_OK if fail_count == 0 else 1)
1722
doctest.testmod()
1723
sys.exit()
2346
1724
2347
1725
# Default values for config file for server-global settings
2348
1726
server_defaults = { "interface": "",
2350
1728
"port": "",
2351
1729
"debug": "False",
2352
1730
"priority":
2353
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1731
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2354
1732
"servicename": "Mandos",
2355
1733
"use_dbus": "True",
2356
1734
"use_ipv6": "True",
2357
1735
"debuglevel": "",
2358
"restore": "True",
2359
"socket": "",
2360
"statedir": "/var/lib/mandos",
2361
"foreground": "False",
2362
"zeroconf": "True",
2363
1736
}
2364
1737
2365
1738
# Parse config file for server-global settings
2370
1743
# Convert the SafeConfigParser object to a dict
2371
1744
server_settings = server_config.defaults()
2372
1745
# Use the appropriate methods on the non-string config options
2373
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1746
for option in ("debug", "use_dbus", "use_ipv6"):
2374
1747
server_settings[option] = server_config.getboolean("DEFAULT",
2375
1748
option)
2376
1749
if server_settings["port"]:
2377
1750
server_settings["port"] = server_config.getint("DEFAULT",
2378
1751
"port")
2379
if server_settings["socket"]:
2380
server_settings["socket"] = server_config.getint("DEFAULT",
2381
"socket")
2382
# Later, stdin will, and stdout and stderr might, be dup'ed
2383
# over with an opened os.devnull. But we don't want this to
2384
# happen with a supplied network socket.
2385
if 0 <= server_settings["socket"] <= 2:
2386
server_settings["socket"] = os.dup(server_settings
2387
["socket"])
2388
1752
del server_config
2389
1753
2390
1754
# Override the settings from the config file with command line
2391
1755
# options, if set.
2392
1756
for option in ("interface", "address", "port", "debug",
2393
1757
"priority", "servicename", "configdir",
2394
"use_dbus", "use_ipv6", "debuglevel", "restore",
2395
"statedir", "socket", "foreground", "zeroconf"):
1758
"use_dbus", "use_ipv6", "debuglevel"):
2396
1759
value = getattr(options, option)
2397
1760
if value is not None:
2398
1761
server_settings[option] = value
2399
1762
del options
2400
1763
# Force all strings to be unicode
2401
1764
for option in server_settings.keys():
2402
if isinstance(server_settings[option], bytes):
2403
server_settings[option] = (server_settings[option]
2404
.decode("utf-8"))
2405
# Force all boolean options to be boolean
2406
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2407
"foreground", "zeroconf"):
2408
server_settings[option] = bool(server_settings[option])
2409
# Debug implies foreground
2410
if server_settings["debug"]:
2411
server_settings["foreground"] = True
1765
if type(server_settings[option]) is str:
1766
server_settings[option] = unicode(server_settings[option])
2412
1767
# Now we have our good server settings in "server_settings"
2413
1768
2414
1769
##################################################################
2415
1770
2416
if (not server_settings["zeroconf"] and
2417
not (server_settings["port"]
2418
or server_settings["socket"] != "")):
2419
parser.error("Needs port or socket to work without"
2420
" Zeroconf")
2421
2422
1771
# For convenience
2423
1772
debug = server_settings["debug"]
2424
1773
debuglevel = server_settings["debuglevel"]
2425
1774
use_dbus = server_settings["use_dbus"]
2426
1775
use_ipv6 = server_settings["use_ipv6"]
2427
stored_state_path = os.path.join(server_settings["statedir"],
2428
stored_state_file)
2429
foreground = server_settings["foreground"]
2430
zeroconf = server_settings["zeroconf"]
2431
2432
if debug:
2433
initlogger(debug, logging.DEBUG)
2434
else:
2435
if not debuglevel:
2436
initlogger(debug)
2437
else:
2438
level = getattr(logging, debuglevel.upper())
2439
initlogger(debug, level)
2440
1776
2441
1777
if server_settings["servicename"] != "Mandos":
2442
1778
syslogger.setFormatter(logging.Formatter
2443
('Mandos ({}) [%(process)d]:'
2444
' %(levelname)s: %(message)s'
2445
.format(server_settings
2446
["servicename"])))
1779
('Mandos (%s) [%%(process)d]:'
1780
' %%(levelname)s: %%(message)s'
1781
% server_settings["servicename"]))
2447
1782
2448
1783
# Parse config file with clients
2449
client_config = configparser.SafeConfigParser(Client
2450
.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)
2451
1793
client_config.read(os.path.join(server_settings["configdir"],
2452
1794
"clients.conf"))
2453
1795
2454
1796
global mandos_dbus_service
2455
1797
mandos_dbus_service = None
2456
1798
2457
socketfd = None
2458
if server_settings["socket"] != "":
2459
socketfd = server_settings["socket"]
2460
1799
tcp_server = MandosServer((server_settings["address"],
2461
1800
server_settings["port"]),
2462
1801
ClientHandler,
2465
1804
use_ipv6=use_ipv6,
2466
1805
gnutls_priority=
2467
1806
server_settings["priority"],
2468
use_dbus=use_dbus,
2469
socketfd=socketfd)
2470
if not foreground:
2471
pidfilename = "/run/mandos.pid"
2472
if not os.path.isdir("/run/."):
2473
pidfilename = "/var/run/mandos.pid"
2474
pidfile = None
1807
use_dbus=use_dbus)
1808
if not debug:
1809
pidfilename = "/var/run/mandos.pid"
2475
1810
try:
2476
1811
pidfile = open(pidfilename, "w")
2477
except IOError as e:
2478
logger.error("Could not open file %r", pidfilename,
2479
exc_info=e)
1812
except IOError:
1813
logger.error("Could not open file %r", pidfilename)
2480
1814
2481
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:
2482
1819
try:
2483
uid = pwd.getpwnam(name).pw_uid
2484
gid = pwd.getpwnam(name).pw_gid
2485
break
1820
uid = pwd.getpwnam("mandos").pw_uid
1821
gid = pwd.getpwnam("mandos").pw_gid
2486
1822
except KeyError:
2487
continue
2488
else:
2489
uid = 65534
2490
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
2491
1829
try:
2492
1830
os.setgid(gid)
2493
1831
os.setuid(uid)
2494
1832
except OSError as error:
2495
if error.errno != errno.EPERM:
2496
raise
1833
if error[0] != errno.EPERM:
1834
raise error
2497
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
2498
1844
if debug:
2499
1845
# Enable all possible GnuTLS debugging
2500
1846
2510
1856
.gnutls_global_set_log_function(debug_gnutls))
2511
1857
2512
1858
# Redirect stdin so all checkers get /dev/null
2513
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1859
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2514
1860
os.dup2(null, sys.stdin.fileno())
2515
1861
if null > 2:
2516
1862
os.close(null)
1863
else:
1864
# No console logging
1865
logger.removeHandler(console)
2517
1866
2518
1867
# Need to fork before connecting to D-Bus
2519
if not foreground:
1868
if not debug:
2520
1869
# Close all input and output, do double fork, etc.
2521
1870
daemon()
2522
1871
2523
# multiprocessing will use threads, so before we use gobject we
2524
# need to inform gobject that threads will be used.
2525
gobject.threads_init()
2526
2527
1872
global main_loop
2528
1873
# From the Avahi example code
2529
DBusGMainLoop(set_as_default=True)
1874
DBusGMainLoop(set_as_default=True )
2530
1875
main_loop = gobject.MainLoop()
2531
1876
bus = dbus.SystemBus()
2532
1877
# End of Avahi example code
2533
1878
if use_dbus:
2534
1879
try:
2535
bus_name = dbus.service.BusName("se.recompile.Mandos",
1880
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2536
1881
bus, do_not_queue=True)
2537
old_bus_name = (dbus.service.BusName
2538
("se.bsnet.fukt.Mandos", bus,
2539
do_not_queue=True))
2540
1882
except dbus.exceptions.NameExistsException as e:
2541
logger.error("Disabling D-Bus:", exc_info=e)
1883
logger.error(unicode(e) + ", disabling D-Bus")
2542
1884
use_dbus = False
2543
1885
server_settings["use_dbus"] = False
2544
1886
tcp_server.use_dbus = False
2545
if zeroconf:
2546
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2547
service = AvahiServiceToSyslog(name =
2548
server_settings["servicename"],
2549
servicetype = "_mandos._tcp",
2550
protocol = protocol, bus = bus)
2551
if server_settings["interface"]:
2552
service.interface = (if_nametoindex
2553
(server_settings["interface"]
2554
.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"])))
2555
1894
2556
1895
global multiprocessing_manager
2557
1896
multiprocessing_manager = multiprocessing.Manager()
2559
1898
client_class = Client
2560
1899
if use_dbus:
2561
1900
client_class = functools.partial(ClientDBus, bus = bus)
2562
2563
client_settings = Client.config_parser(client_config)
2564
old_client_settings = {}
2565
clients_data = {}
2566
2567
# This is used to redirect stdout and stderr for checker processes
2568
global wnull
2569
wnull = open(os.devnull, "w") # A writable /dev/null
2570
# Only used if server is running in foreground but not in debug
2571
# mode
2572
if debug or not foreground:
2573
wnull.close()
2574
2575
# Get client data and settings from last running state.
2576
if server_settings["restore"]:
2577
try:
2578
with open(stored_state_path, "rb") as stored_state:
2579
clients_data, old_client_settings = (pickle.load
2580
(stored_state))
2581
os.remove(stored_state_path)
2582
except IOError as e:
2583
if e.errno == errno.ENOENT:
2584
logger.warning("Could not load persistent state: {}"
2585
.format(os.strerror(e.errno)))
2586
else:
2587
logger.critical("Could not load persistent state:",
2588
exc_info=e)
2589
raise
2590
except EOFError as e:
2591
logger.warning("Could not load persistent state: "
2592
"EOFError:", exc_info=e)
2593
2594
with PGPEngine() as pgp:
2595
for client_name, client in clients_data.items():
2596
# Skip removed clients
2597
if client_name not in client_settings:
2598
continue
2599
2600
# Decide which value to use after restoring saved state.
2601
# We have three different values: Old config file,
2602
# new config file, and saved state.
2603
# New config value takes precedence if it differs from old
2604
# config value, otherwise use saved state.
2605
for name, value in client_settings[client_name].items():
2606
try:
2607
# For each value in new config, check if it
2608
# differs from the old config value (Except for
2609
# the "secret" attribute)
2610
if (name != "secret" and
2611
value != old_client_settings[client_name]
2612
[name]):
2613
client[name] = value
2614
except KeyError:
2615
pass
2616
2617
# Clients who has passed its expire date can still be
2618
# enabled if its last checker was successful. Clients
2619
# whose checker succeeded before we stored its state is
2620
# assumed to have successfully run all checkers during
2621
# downtime.
2622
if client["enabled"]:
2623
if datetime.datetime.utcnow() >= client["expires"]:
2624
if not client["last_checked_ok"]:
2625
logger.warning(
2626
"disabling client {} - Client never "
2627
"performed a successful checker"
2628
.format(client_name))
2629
client["enabled"] = False
2630
elif client["last_checker_status"] != 0:
2631
logger.warning(
2632
"disabling client {} - Client last"
2633
" checker failed with error code {}"
2634
.format(client_name,
2635
client["last_checker_status"]))
2636
client["enabled"] = False
2637
else:
2638
client["expires"] = (datetime.datetime
2639
.utcnow()
2640
+ client["timeout"])
2641
logger.debug("Last checker succeeded,"
2642
" keeping {} enabled"
2643
.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):
2644
1908
try:
2645
client["secret"] = (
2646
pgp.decrypt(client["encrypted_secret"],
2647
client_settings[client_name]
2648
["secret"]))
2649
except PGPError:
2650
# If decryption fails, we use secret from new settings
2651
logger.debug("Failed to decrypt {} old secret"
2652
.format(client_name))
2653
client["secret"] = (
2654
client_settings[client_name]["secret"])
2655
2656
# Add/remove clients based on new changes made to config
2657
for client_name in (set(old_client_settings)
2658
- set(client_settings)):
2659
del clients_data[client_name]
2660
for client_name in (set(client_settings)
2661
- set(old_client_settings)):
2662
clients_data[client_name] = client_settings[client_name]
2663
2664
# Create all client objects
2665
for client_name, client in clients_data.items():
2666
tcp_server.clients[client_name] = client_class(
2667
name = client_name, settings = client,
2668
server_settings = server_settings)
2669
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()))
2670
1918
if not tcp_server.clients:
2671
1919
logger.warning("No clients defined")
2672
2673
if not foreground:
2674
if pidfile is not None:
2675
try:
2676
with pidfile:
2677
pid = os.getpid()
2678
pidfile.write("{}\n".format(pid).encode("utf-8"))
2679
except IOError:
2680
logger.error("Could not write to file %r with PID %d",
2681
pidfilename, pid)
2682
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
2683
1933
del pidfilename
2684
1934
1935
signal.signal(signal.SIGINT, signal.SIG_IGN)
1936
2685
1937
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2686
1938
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2687
1939
2688
1940
if use_dbus:
2689
@alternate_dbus_interfaces({"se.recompile.Mandos":
2690
"se.bsnet.fukt.Mandos"})
2691
class MandosDBusService(DBusObjectWithProperties):
1941
class MandosDBusService(dbus.service.Object):
2692
1942
"""A D-Bus proxy object"""
2693
1943
def __init__(self):
2694
1944
dbus.service.Object.__init__(self, bus, "/")
2695
_interface = "se.recompile.Mandos"
2696
2697
@dbus_interface_annotations(_interface)
2698
def _foo(self):
2699
return { "org.freedesktop.DBus.Property"
2700
".EmitsChangedSignal":
2701
"false"}
1945
_interface = "se.bsnet.fukt.Mandos"
2702
1946
2703
1947
@dbus.service.signal(_interface, signature="o")
2704
1948
def ClientAdded(self, objpath):
2719
1963
def GetAllClients(self):
2720
1964
"D-Bus method"
2721
1965
return dbus.Array(c.dbus_object_path
2722
for c in
2723
tcp_server.clients.itervalues())
1966
for c in tcp_server.clients)
2724
1967
2725
1968
@dbus.service.method(_interface,
2726
1969
out_signature="a{oa{sv}}")
2727
1970
def GetAllClientsWithProperties(self):
2728
1971
"D-Bus method"
2729
1972
return dbus.Dictionary(
2730
{ c.dbus_object_path: c.GetAll("")
2731
for c in tcp_server.clients.itervalues() },
1973
((c.dbus_object_path, c.GetAll(""))
1974
for c in tcp_server.clients),
2732
1975
signature="oa{sv}")
2733
1976
2734
1977
@dbus.service.method(_interface, in_signature="o")
2735
1978
def RemoveClient(self, object_path):
2736
1979
"D-Bus method"
2737
for c in tcp_server.clients.itervalues():
1980
for c in tcp_server.clients:
2738
1981
if c.dbus_object_path == object_path:
2739
del tcp_server.clients[c.name]
1982
tcp_server.clients.remove(c)
2740
1983
c.remove_from_connection()
2741
1984
# Don't signal anything except ClientRemoved
2742
1985
c.disable(quiet=True)
2751
1994
2752
1995
def cleanup():
2753
1996
"Cleanup function; run on exit"
2754
if zeroconf:
2755
service.cleanup()
2756
2757
multiprocessing.active_children()
2758
wnull.close()
2759
if not (tcp_server.clients or client_settings):
2760
return
2761
2762
# Store client before exiting. Secrets are encrypted with key
2763
# based on what config file has. If config file is
2764
# removed/edited, old secret will thus be unrecovable.
2765
clients = {}
2766
with PGPEngine() as pgp:
2767
for client in tcp_server.clients.itervalues():
2768
key = client_settings[client.name]["secret"]
2769
client.encrypted_secret = pgp.encrypt(client.secret,
2770
key)
2771
client_dict = {}
2772
2773
# A list of attributes that can not be pickled
2774
# + secret.
2775
exclude = { "bus", "changedstate", "secret",
2776
"checker", "server_settings" }
2777
for name, typ in (inspect.getmembers
2778
(dbus.service.Object)):
2779
exclude.add(name)
2780
2781
client_dict["encrypted_secret"] = (client
2782
.encrypted_secret)
2783
for attr in client.client_structure:
2784
if attr not in exclude:
2785
client_dict[attr] = getattr(client, attr)
2786
2787
clients[client.name] = client_dict
2788
del client_settings[client.name]["secret"]
2789
2790
try:
2791
with (tempfile.NamedTemporaryFile
2792
(mode='wb', suffix=".pickle", prefix='clients-',
2793
dir=os.path.dirname(stored_state_path),
2794
delete=False)) as stored_state:
2795
pickle.dump((clients, client_settings), stored_state)
2796
tempname=stored_state.name
2797
os.rename(tempname, stored_state_path)
2798
except (IOError, OSError) as e:
2799
if not debug:
2800
try:
2801
os.remove(tempname)
2802
except NameError:
2803
pass
2804
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2805
logger.warning("Could not save persistent state: {}"
2806
.format(os.strerror(e.errno)))
2807
else:
2808
logger.warning("Could not save persistent state:",
2809
exc_info=e)
2810
raise
2811
2812
# Delete all clients, and settings from config
1997
service.cleanup()
1998
2813
1999
while tcp_server.clients:
2814
name, client = tcp_server.clients.popitem()
2000
client = tcp_server.clients.pop()
2815
2001
if use_dbus:
2816
2002
client.remove_from_connection()
2003
client.disable_hook = None
2817
2004
# Don't signal anything except ClientRemoved
2818
2005
client.disable(quiet=True)
2819
2006
if use_dbus:
2820
2007
# Emit D-Bus signal
2821
mandos_dbus_service.ClientRemoved(client
2822
.dbus_object_path,
2008
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2823
2009
client.name)
2824
client_settings.clear()
2825
2010
2826
2011
atexit.register(cleanup)
2827
2012
2828
for client in tcp_server.clients.itervalues():
2013
for client in tcp_server.clients:
2829
2014
if use_dbus:
2830
2015
# Emit D-Bus signal
2831
2016
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2832
# Need to initiate checking of clients
2833
if client.enabled:
2834
client.init_checker()
2017
client.enable()
2835
2018
2836
2019
tcp_server.enable()
2837
2020
tcp_server.server_activate()
2838
2021
2839
2022
# Find out what port we got
2840
if zeroconf:
2841
service.port = tcp_server.socket.getsockname()[1]
2023
service.port = tcp_server.socket.getsockname()[1]
2842
2024
if use_ipv6:
2843
2025
logger.info("Now listening on address %r, port %d,"
2844
" flowinfo %d, scope_id %d",
2845
*tcp_server.socket.getsockname())
2026
" flowinfo %d, scope_id %d"
2027
% tcp_server.socket.getsockname())
2846
2028
else: # IPv4
2847
logger.info("Now listening on address %r, port %d",
2848
*tcp_server.socket.getsockname())
2029
logger.info("Now listening on address %r, port %d"
2030
% tcp_server.socket.getsockname())
2849
2031
2850
2032
#service.interface = tcp_server.socket.getsockname()[3]
2851
2033
2852
2034
try:
2853
if zeroconf:
2854
# From the Avahi example code
2855
try:
2856
service.activate()
2857
except dbus.exceptions.DBusException as error:
2858
logger.critical("D-Bus Exception", exc_info=error)
2859
cleanup()
2860
sys.exit(1)
2861
# 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
2862
2043
2863
2044
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2864
2045
lambda *args, **kwargs:
2868
2049
logger.debug("Starting main loop")
2869
2050
main_loop.run()
2870
2051
except AvahiError as error:
2871
logger.critical("Avahi Error", exc_info=error)
2052
logger.critical("AvahiError: %s", error)
2872
2053
cleanup()
2873
2054
sys.exit(1)
2874
2055
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0