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- Committer: Teddy Hogeborn
- Date: 2014-07-13 20:37:44 UTC
- mfrom: (237.7.258 trunk)
- Revision ID: teddy@recompile.se-20140713203744-538hqhk81vw9dixv
Merge from trunk.
- files added:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
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# Everything else is
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# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
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# Copyright © 2008-2014 Teddy Hogeborn
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# Copyright © 2008-2014 Björn Påhlsson
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16
#
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# This program is free software: you can redistribute it and/or modify
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18
# it under the terms of the GNU General Public License as published by
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
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from future_builtins import *
38
37
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import SocketServer as socketserver
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40
import socket
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41
import argparse
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65
import cPickle as pickle
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66
import multiprocessing
65
67
import types
68
import binascii
69
import tempfile
70
import itertools
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import collections
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72
67
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import dbus
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74
import dbus.service
82
88
except ImportError:
83
89
SO_BINDTODEVICE = None
84
90
85
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version = "1.4.1"
87
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
96
logger.addHandler(syslogger)
97
98
console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(console)
91
version = "1.6.5"
92
stored_state_file = "clients.pickle"
93
94
logger = logging.getLogger()
95
syslogger = None
96
97
try:
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.if_nametoindex)
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
108
interface))
109
interface_index = struct.unpack(str("I"),
110
ifreq[16:20])[0]
111
return interface_index
112
113
114
def initlogger(debug, level=logging.WARNING):
115
"""init logger and add loglevel"""
116
117
global syslogger
118
syslogger = (logging.handlers.SysLogHandler
119
(facility =
120
logging.handlers.SysLogHandler.LOG_DAEMON,
121
address = str("/dev/log")))
122
syslogger.setFormatter(logging.Formatter
123
('Mandos [%(process)d]: %(levelname)s:'
124
' %(message)s'))
125
logger.addHandler(syslogger)
126
127
if debug:
128
console = logging.StreamHandler()
129
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
130
' [%(process)d]:'
131
' %(levelname)s:'
132
' %(message)s'))
133
logger.addHandler(console)
134
logger.setLevel(level)
135
136
137
class PGPError(Exception):
138
"""Exception if encryption/decryption fails"""
139
pass
140
141
142
class PGPEngine(object):
143
"""A simple class for OpenPGP symmetric encryption & decryption"""
144
def __init__(self):
145
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
146
self.gnupgargs = ['--batch',
147
'--home', self.tempdir,
148
'--force-mdc',
149
'--quiet',
150
'--no-use-agent']
151
152
def __enter__(self):
153
return self
154
155
def __exit__(self, exc_type, exc_value, traceback):
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self._cleanup()
157
return False
158
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def __del__(self):
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self._cleanup()
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def _cleanup(self):
163
if self.tempdir is not None:
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# Delete contents of tempdir
165
for root, dirs, files in os.walk(self.tempdir,
166
topdown = False):
167
for filename in files:
168
os.remove(os.path.join(root, filename))
169
for dirname in dirs:
170
os.rmdir(os.path.join(root, dirname))
171
# Remove tempdir
172
os.rmdir(self.tempdir)
173
self.tempdir = None
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175
def password_encode(self, password):
176
# Passphrase can not be empty and can not contain newlines or
177
# NUL bytes. So we prefix it and hex encode it.
178
encoded = b"mandos" + binascii.hexlify(password)
179
if len(encoded) > 2048:
180
# GnuPG can't handle long passwords, so encode differently
181
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
182
.replace(b"\n", b"\\n")
183
.replace(b"\0", b"\\x00"))
184
return encoded
185
186
def encrypt(self, data, password):
187
passphrase = self.password_encode(password)
188
with tempfile.NamedTemporaryFile(dir=self.tempdir
189
) as passfile:
190
passfile.write(passphrase)
191
passfile.flush()
192
proc = subprocess.Popen(['gpg', '--symmetric',
193
'--passphrase-file',
194
passfile.name]
195
+ self.gnupgargs,
196
stdin = subprocess.PIPE,
197
stdout = subprocess.PIPE,
198
stderr = subprocess.PIPE)
199
ciphertext, err = proc.communicate(input = data)
200
if proc.returncode != 0:
201
raise PGPError(err)
202
return ciphertext
203
204
def decrypt(self, data, password):
205
passphrase = self.password_encode(password)
206
with tempfile.NamedTemporaryFile(dir = self.tempdir
207
) as passfile:
208
passfile.write(passphrase)
209
passfile.flush()
210
proc = subprocess.Popen(['gpg', '--decrypt',
211
'--passphrase-file',
212
passfile.name]
213
+ self.gnupgargs,
214
stdin = subprocess.PIPE,
215
stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
217
decrypted_plaintext, err = proc.communicate(input
218
= data)
219
if proc.returncode != 0:
220
raise PGPError(err)
221
return decrypted_plaintext
222
103
223
104
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class AvahiError(Exception):
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225
def __init__(self, value, *args, **kwargs):
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243
Used to optionally bind to the specified interface.
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name: string; Example: 'Mandos'
125
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type: string; Example: '_mandos._tcp'.
126
See <http://www.dns-sd.org/ServiceTypes.html>
246
See <https://www.iana.org/assignments/service-names-port-numbers>
127
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port: integer; what port to announce
128
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TXT: list of strings; TXT record for the service
129
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domain: string; Domain to publish on, default to .local if empty.
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255
server: D-Bus Server
136
256
bus: dbus.SystemBus()
137
257
"""
258
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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
139
260
servicetype = None, port = None, TXT = None,
140
261
domain = "", host = "", max_renames = 32768,
153
274
self.server = None
154
275
self.bus = bus
155
276
self.entry_group_state_changed_match = None
277
156
278
def rename(self):
157
279
"""Derived from the Avahi example code"""
158
280
if self.rename_count >= self.max_renames:
164
286
.GetAlternativeServiceName(self.name))
165
287
logger.info("Changing Zeroconf service name to %r ...",
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288
self.name)
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
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' %%(levelname)s: %%(message)s'
170
% self.name))
171
289
self.remove()
172
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try:
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self.add()
174
292
except dbus.exceptions.DBusException as error:
175
logger.critical("DBusException: %s", error)
293
logger.critical("D-Bus Exception", exc_info=error)
176
294
self.cleanup()
177
295
os._exit(1)
178
296
self.rename_count += 1
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179
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def remove(self):
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"""Derived from the Avahi example code"""
181
300
if self.entry_group_state_changed_match is not None:
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self.entry_group_state_changed_match = None
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303
if self.group is not None:
185
304
self.group.Reset()
305
186
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def add(self):
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"""Derived from the Avahi example code"""
188
308
self.remove()
193
313
avahi.DBUS_INTERFACE_ENTRY_GROUP)
194
314
self.entry_group_state_changed_match = (
195
315
self.group.connect_to_signal(
196
'StateChanged', self .entry_group_state_changed))
316
'StateChanged', self.entry_group_state_changed))
197
317
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
198
318
self.name, self.type)
199
319
self.group.AddService(
205
325
dbus.UInt16(self.port),
206
326
avahi.string_array_to_txt_array(self.TXT))
207
327
self.group.Commit()
328
208
329
def entry_group_state_changed(self, state, error):
209
330
"""Derived from the Avahi example code"""
210
331
logger.debug("Avahi entry group state change: %i", state)
217
338
elif state == avahi.ENTRY_GROUP_FAILURE:
218
339
logger.critical("Avahi: Error in group state changed %s",
219
340
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
341
raise AvahiGroupError("State changed: {0!s}"
342
.format(error))
343
222
344
def cleanup(self):
223
345
"""Derived from the Avahi example code"""
224
346
if self.group is not None:
225
347
try:
226
348
self.group.Free()
227
349
except (dbus.exceptions.UnknownMethodException,
228
dbus.exceptions.DBusException) as e:
350
dbus.exceptions.DBusException):
229
351
pass
230
352
self.group = None
231
353
self.remove()
354
232
355
def server_state_changed(self, state, error=None):
233
356
"""Derived from the Avahi example code"""
234
357
logger.debug("Avahi server state change: %i", state)
253
376
logger.debug("Unknown state: %r", state)
254
377
else:
255
378
logger.debug("Unknown state: %r: %r", state, error)
379
256
380
def activate(self):
257
381
"""Derived from the Avahi example code"""
258
382
if self.server is None:
266
390
self.server_state_changed(self.server.GetState())
267
391
268
392
269
def _timedelta_to_milliseconds(td):
393
class AvahiServiceToSyslog(AvahiService):
394
def rename(self):
395
"""Add the new name to the syslog messages"""
396
ret = AvahiService.rename(self)
397
syslogger.setFormatter(logging.Formatter
398
('Mandos ({0}) [%(process)d]:'
399
' %(levelname)s: %(message)s'
400
.format(self.name)))
401
return ret
402
403
404
def timedelta_to_milliseconds(td):
270
405
"Convert a datetime.timedelta() to milliseconds"
271
406
return ((td.days * 24 * 60 * 60 * 1000)
272
407
+ (td.seconds * 1000)
273
408
+ (td.microseconds // 1000))
274
409
410
275
411
class Client(object):
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412
"""A representation of a client host served by this server.
277
413
278
414
Attributes:
279
_approved: bool(); 'None' if not yet approved/disapproved
415
approved: bool(); 'None' if not yet approved/disapproved
280
416
approval_delay: datetime.timedelta(); Time to wait for approval
281
417
approval_duration: datetime.timedelta(); Duration of one approval
282
418
checker: subprocess.Popen(); a running checker process used
289
425
instance %(name)s can be used in the command.
290
426
checker_initiator_tag: a gobject event source tag, or None
291
427
created: datetime.datetime(); (UTC) object creation
428
client_structure: Object describing what attributes a client has
429
and is used for storing the client at exit
292
430
current_checker_command: string; current running checker_command
293
disable_hook: If set, called by disable() as disable_hook(self)
294
431
disable_initiator_tag: a gobject event source tag, or None
295
432
enabled: bool()
296
433
fingerprint: string (40 or 32 hexadecimal digits); used to
299
436
interval: datetime.timedelta(); How often to start a new checker
300
437
last_approval_request: datetime.datetime(); (UTC) or None
301
438
last_checked_ok: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
439
last_checker_status: integer between 0 and 255 reflecting exit
440
status of last checker. -1 reflects crashed
441
checker, -2 means no checker completed yet.
442
last_enabled: datetime.datetime(); (UTC) or None
303
443
name: string; from the config file, used in log messages and
304
444
D-Bus identifiers
305
445
secret: bytestring; sent verbatim (over TLS) to client
306
446
timeout: datetime.timedelta(); How long from last_checked_ok
307
447
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
448
extended_timeout: extra long timeout when secret has been sent
309
449
runtime_expansions: Allowed attributes for runtime expansion.
310
450
expires: datetime.datetime(); time (UTC) when a client will be
311
451
disabled, or None
452
server_settings: The server_settings dict from main()
312
453
"""
313
454
314
455
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
456
"created", "enabled", "expires",
457
"fingerprint", "host", "interval",
458
"last_approval_request", "last_checked_ok",
317
459
"last_enabled", "name", "timeout")
460
client_defaults = { "timeout": "PT5M",
461
"extended_timeout": "PT15M",
462
"interval": "PT2M",
463
"checker": "fping -q -- %%(host)s",
464
"host": "",
465
"approval_delay": "PT0S",
466
"approval_duration": "PT1S",
467
"approved_by_default": "True",
468
"enabled": "True",
469
}
318
470
319
471
def timeout_milliseconds(self):
320
472
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
473
return timedelta_to_milliseconds(self.timeout)
322
474
323
475
def extended_timeout_milliseconds(self):
324
476
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
477
return timedelta_to_milliseconds(self.extended_timeout)
326
478
327
479
def interval_milliseconds(self):
328
480
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
481
return timedelta_to_milliseconds(self.interval)
330
482
331
483
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
333
334
def __init__(self, name = None, disable_hook=None, config=None):
335
"""Note: the 'checker' key in 'config' sets the
336
'checker_command' attribute and *not* the 'checker'
337
attribute."""
484
return timedelta_to_milliseconds(self.approval_delay)
485
486
@staticmethod
487
def config_parser(config):
488
"""Construct a new dict of client settings of this form:
489
{ client_name: {setting_name: value, ...}, ...}
490
with exceptions for any special settings as defined above.
491
NOTE: Must be a pure function. Must return the same result
492
value given the same arguments.
493
"""
494
settings = {}
495
for client_name in config.sections():
496
section = dict(config.items(client_name))
497
client = settings[client_name] = {}
498
499
client["host"] = section["host"]
500
# Reformat values from string types to Python types
501
client["approved_by_default"] = config.getboolean(
502
client_name, "approved_by_default")
503
client["enabled"] = config.getboolean(client_name,
504
"enabled")
505
506
client["fingerprint"] = (section["fingerprint"].upper()
507
.replace(" ", ""))
508
if "secret" in section:
509
client["secret"] = section["secret"].decode("base64")
510
elif "secfile" in section:
511
with open(os.path.expanduser(os.path.expandvars
512
(section["secfile"])),
513
"rb") as secfile:
514
client["secret"] = secfile.read()
515
else:
516
raise TypeError("No secret or secfile for section {0}"
517
.format(section))
518
client["timeout"] = string_to_delta(section["timeout"])
519
client["extended_timeout"] = string_to_delta(
520
section["extended_timeout"])
521
client["interval"] = string_to_delta(section["interval"])
522
client["approval_delay"] = string_to_delta(
523
section["approval_delay"])
524
client["approval_duration"] = string_to_delta(
525
section["approval_duration"])
526
client["checker_command"] = section["checker"]
527
client["last_approval_request"] = None
528
client["last_checked_ok"] = None
529
client["last_checker_status"] = -2
530
531
return settings
532
533
def __init__(self, settings, name = None, server_settings=None):
338
534
self.name = name
339
if config is None:
340
config = {}
535
if server_settings is None:
536
server_settings = {}
537
self.server_settings = server_settings
538
# adding all client settings
539
for setting, value in settings.iteritems():
540
setattr(self, setting, value)
541
542
if self.enabled:
543
if not hasattr(self, "last_enabled"):
544
self.last_enabled = datetime.datetime.utcnow()
545
if not hasattr(self, "expires"):
546
self.expires = (datetime.datetime.utcnow()
547
+ self.timeout)
548
else:
549
self.last_enabled = None
550
self.expires = None
551
341
552
logger.debug("Creating client %r", self.name)
342
553
# Uppercase and remove spaces from fingerprint for later
343
554
# comparison purposes with return value from the fingerprint()
344
555
# function
345
self.fingerprint = (config["fingerprint"].upper()
346
.replace(" ", ""))
347
556
logger.debug(" Fingerprint: %s", self.fingerprint)
348
if "secret" in config:
349
self.secret = config["secret"].decode("base64")
350
elif "secfile" in config:
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
353
"rb") as secfile:
354
self.secret = secfile.read()
355
else:
356
raise TypeError("No secret or secfile for client %s"
357
% self.name)
358
self.host = config.get("host", "")
359
self.created = datetime.datetime.utcnow()
360
self.enabled = False
361
self.last_approval_request = None
362
self.last_enabled = None
363
self.last_checked_ok = None
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
367
self.interval = string_to_delta(config["interval"])
368
self.disable_hook = disable_hook
557
self.created = settings.get("created",
558
datetime.datetime.utcnow())
559
560
# attributes specific for this server instance
369
561
self.checker = None
370
562
self.checker_initiator_tag = None
371
563
self.disable_initiator_tag = None
372
self.expires = None
373
564
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
375
565
self.current_checker_command = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
379
True)
566
self.approved = None
380
567
self.approvals_pending = 0
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
568
self.changedstate = (multiprocessing_manager
386
569
.Condition(multiprocessing_manager
387
570
.Lock()))
571
self.client_structure = [attr for attr in
572
self.__dict__.iterkeys()
573
if not attr.startswith("_")]
574
self.client_structure.append("client_structure")
575
576
for name, t in inspect.getmembers(type(self),
577
lambda obj:
578
isinstance(obj,
579
property)):
580
if not name.startswith("_"):
581
self.client_structure.append(name)
388
582
583
# Send notice to process children that client state has changed
389
584
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
585
with self.changedstate:
586
self.changedstate.notify_all()
393
587
394
588
def enable(self):
395
589
"""Start this client's checker and timeout hooks"""
396
590
if getattr(self, "enabled", False):
397
591
# Already enabled
398
592
return
593
self.expires = datetime.datetime.utcnow() + self.timeout
594
self.enabled = True
595
self.last_enabled = datetime.datetime.utcnow()
596
self.init_checker()
399
597
self.send_changedstate()
598
599
def disable(self, quiet=True):
600
"""Disable this client."""
601
if not getattr(self, "enabled", False):
602
return False
603
if not quiet:
604
logger.info("Disabling client %s", self.name)
605
if getattr(self, "disable_initiator_tag", None) is not None:
606
gobject.source_remove(self.disable_initiator_tag)
607
self.disable_initiator_tag = None
608
self.expires = None
609
if getattr(self, "checker_initiator_tag", None) is not None:
610
gobject.source_remove(self.checker_initiator_tag)
611
self.checker_initiator_tag = None
612
self.stop_checker()
613
self.enabled = False
614
if not quiet:
615
self.send_changedstate()
616
# Do not run this again if called by a gobject.timeout_add
617
return False
618
619
def __del__(self):
620
self.disable()
621
622
def init_checker(self):
400
623
# Schedule a new checker to be started an 'interval' from now,
401
624
# and every interval from then on.
625
if self.checker_initiator_tag is not None:
626
gobject.source_remove(self.checker_initiator_tag)
402
627
self.checker_initiator_tag = (gobject.timeout_add
403
628
(self.interval_milliseconds(),
404
629
self.start_checker))
405
630
# Schedule a disable() when 'timeout' has passed
406
self.expires = datetime.datetime.utcnow() + self.timeout
631
if self.disable_initiator_tag is not None:
632
gobject.source_remove(self.disable_initiator_tag)
407
633
self.disable_initiator_tag = (gobject.timeout_add
408
634
(self.timeout_milliseconds(),
409
635
self.disable))
410
self.enabled = True
411
self.last_enabled = datetime.datetime.utcnow()
412
636
# Also start a new checker *right now*.
413
637
self.start_checker()
414
638
415
def disable(self, quiet=True):
416
"""Disable this client."""
417
if not getattr(self, "enabled", False):
418
return False
419
if not quiet:
420
self.send_changedstate()
421
if not quiet:
422
logger.info("Disabling client %s", self.name)
423
if getattr(self, "disable_initiator_tag", False):
424
gobject.source_remove(self.disable_initiator_tag)
425
self.disable_initiator_tag = None
426
self.expires = None
427
if getattr(self, "checker_initiator_tag", False):
428
gobject.source_remove(self.checker_initiator_tag)
429
self.checker_initiator_tag = None
430
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
433
self.enabled = False
434
# Do not run this again if called by a gobject.timeout_add
435
return False
436
437
def __del__(self):
438
self.disable_hook = None
439
self.disable()
440
441
639
def checker_callback(self, pid, condition, command):
442
640
"""The checker has completed, so take appropriate actions."""
443
641
self.checker_callback_tag = None
444
642
self.checker = None
445
643
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
644
self.last_checker_status = os.WEXITSTATUS(condition)
645
if self.last_checker_status == 0:
448
646
logger.info("Checker for %(name)s succeeded",
449
647
vars(self))
450
648
self.checked_ok()
452
650
logger.info("Checker for %(name)s failed",
453
651
vars(self))
454
652
else:
653
self.last_checker_status = -1
455
654
logger.warning("Checker for %(name)s crashed?",
456
655
vars(self))
457
656
458
def checked_ok(self, timeout=None):
459
"""Bump up the timeout for this client.
460
461
This should only be called when the client has been seen,
462
alive and well.
463
"""
657
def checked_ok(self):
658
"""Assert that the client has been seen, alive and well."""
659
self.last_checked_ok = datetime.datetime.utcnow()
660
self.last_checker_status = 0
661
self.bump_timeout()
662
663
def bump_timeout(self, timeout=None):
664
"""Bump up the timeout for this client."""
464
665
if timeout is None:
465
666
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
667
if self.disable_initiator_tag is not None:
468
668
gobject.source_remove(self.disable_initiator_tag)
669
self.disable_initiator_tag = None
469
670
if getattr(self, "enabled", False):
470
671
self.disable_initiator_tag = (gobject.timeout_add
471
(_timedelta_to_milliseconds
672
(timedelta_to_milliseconds
472
673
(timeout), self.disable))
473
674
self.expires = datetime.datetime.utcnow() + timeout
474
675
481
682
If a checker already exists, leave it running and do
482
683
nothing."""
483
684
# The reason for not killing a running checker is that if we
484
# did that, then if a checker (for some reason) started
485
# running slowly and taking more than 'interval' time, the
486
# client would inevitably timeout, since no checker would get
487
# a chance to run to completion. If we instead leave running
685
# did that, and if a checker (for some reason) started running
686
# slowly and taking more than 'interval' time, then the client
687
# would inevitably timeout, since no checker would get a
688
# chance to run to completion. If we instead leave running
488
689
# checkers alone, the checker would have to take more time
489
690
# than 'timeout' for the client to be disabled, which is as it
490
691
# should be.
492
693
# If a checker exists, make sure it is not a zombie
493
694
try:
494
695
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
495
except (AttributeError, OSError) as error:
496
if (isinstance(error, OSError)
497
and error.errno != errno.ECHILD):
498
raise error
696
except AttributeError:
697
pass
698
except OSError as error:
699
if error.errno != errno.ECHILD:
700
raise
499
701
else:
500
702
if pid:
501
703
logger.warning("Checker was a zombie")
504
706
self.current_checker_command)
505
707
# Start a new checker if needed
506
708
if self.checker is None:
709
# Escape attributes for the shell
710
escaped_attrs = dict(
711
(attr, re.escape(unicode(getattr(self, attr))))
712
for attr in
713
self.runtime_expansions)
507
714
try:
508
# In case checker_command has exactly one % operator
509
command = self.checker_command % self.host
510
except TypeError:
511
# Escape attributes for the shell
512
escaped_attrs = dict(
513
(attr,
514
re.escape(unicode(str(getattr(self, attr, "")),
515
errors=
516
'replace')))
517
for attr in
518
self.runtime_expansions)
519
520
try:
521
command = self.checker_command % escaped_attrs
522
except TypeError as error:
523
logger.error('Could not format string "%s":'
524
' %s', self.checker_command, error)
525
return True # Try again later
715
command = self.checker_command % escaped_attrs
716
except TypeError as error:
717
logger.error('Could not format string "%s"',
718
self.checker_command, exc_info=error)
719
return True # Try again later
526
720
self.current_checker_command = command
527
721
try:
528
722
logger.info("Starting checker %r for %s",
531
725
# in normal mode, that is already done by daemon(),
532
726
# and in debug mode we don't want to. (Stdin is
533
727
# always replaced by /dev/null.)
728
# The exception is when not debugging but nevertheless
729
# running in the foreground; use the previously
730
# created wnull.
731
popen_args = {}
732
if (not self.server_settings["debug"]
733
and self.server_settings["foreground"]):
734
popen_args.update({"stdout": wnull,
735
"stderr": wnull })
534
736
self.checker = subprocess.Popen(command,
535
737
close_fds=True,
536
shell=True, cwd="/")
537
self.checker_callback_tag = (gobject.child_watch_add
538
(self.checker.pid,
539
self.checker_callback,
540
data=command))
541
# The checker may have completed before the gobject
542
# watch was added. Check for this.
738
shell=True, cwd="/",
739
**popen_args)
740
except OSError as error:
741
logger.error("Failed to start subprocess",
742
exc_info=error)
743
return True
744
self.checker_callback_tag = (gobject.child_watch_add
745
(self.checker.pid,
746
self.checker_callback,
747
data=command))
748
# The checker may have completed before the gobject
749
# watch was added. Check for this.
750
try:
543
751
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
544
if pid:
545
gobject.source_remove(self.checker_callback_tag)
546
self.checker_callback(pid, status, command)
547
752
except OSError as error:
548
logger.error("Failed to start subprocess: %s",
549
error)
753
if error.errno == errno.ECHILD:
754
# This should never happen
755
logger.error("Child process vanished",
756
exc_info=error)
757
return True
758
raise
759
if pid:
760
gobject.source_remove(self.checker_callback_tag)
761
self.checker_callback(pid, status, command)
550
762
# Re-run this periodically if run by gobject.timeout_add
551
763
return True
552
764
559
771
return
560
772
logger.debug("Stopping checker for %(name)s", vars(self))
561
773
try:
562
os.kill(self.checker.pid, signal.SIGTERM)
774
self.checker.terminate()
563
775
#time.sleep(0.5)
564
776
#if self.checker.poll() is None:
565
# os.kill(self.checker.pid, signal.SIGKILL)
777
# self.checker.kill()
566
778
except OSError as error:
567
779
if error.errno != errno.ESRCH: # No such process
568
780
raise
585
797
# "Set" method, so we fail early here:
586
798
if byte_arrays and signature != "ay":
587
799
raise ValueError("Byte arrays not supported for non-'ay'"
588
" signature %r" % signature)
800
" signature {0!r}".format(signature))
589
801
def decorator(func):
590
802
func._dbus_is_property = True
591
803
func._dbus_interface = dbus_interface
599
811
return decorator
600
812
601
813
814
def dbus_interface_annotations(dbus_interface):
815
"""Decorator for marking functions returning interface annotations
816
817
Usage:
818
819
@dbus_interface_annotations("org.example.Interface")
820
def _foo(self): # Function name does not matter
821
return {"org.freedesktop.DBus.Deprecated": "true",
822
"org.freedesktop.DBus.Property.EmitsChangedSignal":
823
"false"}
824
"""
825
def decorator(func):
826
func._dbus_is_interface = True
827
func._dbus_interface = dbus_interface
828
func._dbus_name = dbus_interface
829
return func
830
return decorator
831
832
833
def dbus_annotations(annotations):
834
"""Decorator to annotate D-Bus methods, signals or properties
835
Usage:
836
837
@dbus_service_property("org.example.Interface", signature="b",
838
access="r")
839
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
840
"org.freedesktop.DBus.Property."
841
"EmitsChangedSignal": "false"})
842
def Property_dbus_property(self):
843
return dbus.Boolean(False)
844
"""
845
def decorator(func):
846
func._dbus_annotations = annotations
847
return func
848
return decorator
849
850
602
851
class DBusPropertyException(dbus.exceptions.DBusException):
603
852
"""A base class for D-Bus property-related exceptions
604
853
"""
627
876
"""
628
877
629
878
@staticmethod
630
def _is_dbus_property(obj):
631
return getattr(obj, "_dbus_is_property", False)
879
def _is_dbus_thing(thing):
880
"""Returns a function testing if an attribute is a D-Bus thing
881
882
If called like _is_dbus_thing("method") it returns a function
883
suitable for use as predicate to inspect.getmembers().
884
"""
885
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
886
False)
632
887
633
def _get_all_dbus_properties(self):
888
def _get_all_dbus_things(self, thing):
634
889
"""Returns a generator of (name, attribute) pairs
635
890
"""
636
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
891
return ((getattr(athing.__get__(self), "_dbus_name",
892
name),
893
athing.__get__(self))
637
894
for cls in self.__class__.__mro__
638
for name, prop in
639
inspect.getmembers(cls, self._is_dbus_property))
895
for name, athing in
896
inspect.getmembers(cls,
897
self._is_dbus_thing(thing)))
640
898
641
899
def _get_dbus_property(self, interface_name, property_name):
642
900
"""Returns a bound method if one exists which is a D-Bus
644
902
"""
645
903
for cls in self.__class__.__mro__:
646
904
for name, value in (inspect.getmembers
647
(cls, self._is_dbus_property)):
905
(cls,
906
self._is_dbus_thing("property"))):
648
907
if (value._dbus_name == property_name
649
908
and value._dbus_interface == interface_name):
650
909
return value.__get__(self)
678
937
# The byte_arrays option is not supported yet on
679
938
# signatures other than "ay".
680
939
if prop._dbus_signature != "ay":
681
raise ValueError
682
value = dbus.ByteArray(''.join(unichr(byte)
683
for byte in value))
940
raise ValueError("Byte arrays not supported for non-"
941
"'ay' signature {0!r}"
942
.format(prop._dbus_signature))
943
value = dbus.ByteArray(b''.join(chr(byte)
944
for byte in value))
684
945
prop(value)
685
946
686
947
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
691
952
692
953
Note: Will not include properties with access="write".
693
954
"""
694
all = {}
695
for name, prop in self._get_all_dbus_properties():
955
properties = {}
956
for name, prop in self._get_all_dbus_things("property"):
696
957
if (interface_name
697
958
and interface_name != prop._dbus_interface):
698
959
# Interface non-empty but did not match
702
963
continue
703
964
value = prop()
704
965
if not hasattr(value, "variant_level"):
705
all[name] = value
966
properties[name] = value
706
967
continue
707
all[name] = type(value)(value, variant_level=
708
value.variant_level+1)
709
return dbus.Dictionary(all, signature="sv")
968
properties[name] = type(value)(value, variant_level=
969
value.variant_level+1)
970
return dbus.Dictionary(properties, signature="sv")
710
971
711
972
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
712
973
out_signature="s",
713
974
path_keyword='object_path',
714
975
connection_keyword='connection')
715
976
def Introspect(self, object_path, connection):
716
"""Standard D-Bus method, overloaded to insert property tags.
977
"""Overloading of standard D-Bus method.
978
979
Inserts property tags and interface annotation tags.
717
980
"""
718
981
xmlstring = dbus.service.Object.Introspect(self, object_path,
719
982
connection)
726
989
e.setAttribute("access", prop._dbus_access)
727
990
return e
728
991
for if_tag in document.getElementsByTagName("interface"):
992
# Add property tags
729
993
for tag in (make_tag(document, name, prop)
730
994
for name, prop
731
in self._get_all_dbus_properties()
995
in self._get_all_dbus_things("property")
732
996
if prop._dbus_interface
733
997
== if_tag.getAttribute("name")):
734
998
if_tag.appendChild(tag)
999
# Add annotation tags
1000
for typ in ("method", "signal", "property"):
1001
for tag in if_tag.getElementsByTagName(typ):
1002
annots = dict()
1003
for name, prop in (self.
1004
_get_all_dbus_things(typ)):
1005
if (name == tag.getAttribute("name")
1006
and prop._dbus_interface
1007
== if_tag.getAttribute("name")):
1008
annots.update(getattr
1009
(prop,
1010
"_dbus_annotations",
1011
{}))
1012
for name, value in annots.iteritems():
1013
ann_tag = document.createElement(
1014
"annotation")
1015
ann_tag.setAttribute("name", name)
1016
ann_tag.setAttribute("value", value)
1017
tag.appendChild(ann_tag)
1018
# Add interface annotation tags
1019
for annotation, value in dict(
1020
itertools.chain.from_iterable(
1021
annotations().iteritems()
1022
for name, annotations in
1023
self._get_all_dbus_things("interface")
1024
if name == if_tag.getAttribute("name")
1025
)).iteritems():
1026
ann_tag = document.createElement("annotation")
1027
ann_tag.setAttribute("name", annotation)
1028
ann_tag.setAttribute("value", value)
1029
if_tag.appendChild(ann_tag)
735
1030
# Add the names to the return values for the
736
1031
# "org.freedesktop.DBus.Properties" methods
737
1032
if (if_tag.getAttribute("name")
752
1047
except (AttributeError, xml.dom.DOMException,
753
1048
xml.parsers.expat.ExpatError) as error:
754
1049
logger.error("Failed to override Introspection method",
755
error)
1050
exc_info=error)
756
1051
return xmlstring
757
1052
758
1053
759
def datetime_to_dbus (dt, variant_level=0):
1054
def datetime_to_dbus(dt, variant_level=0):
760
1055
"""Convert a UTC datetime.datetime() to a D-Bus type."""
761
1056
if dt is None:
762
1057
return dbus.String("", variant_level = variant_level)
763
1058
return dbus.String(dt.isoformat(),
764
1059
variant_level=variant_level)
765
1060
766
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
767
.__metaclass__):
768
"""Applied to an empty subclass of a D-Bus object, this metaclass
769
will add additional D-Bus attributes matching a certain pattern.
1061
1062
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1063
"""A class decorator; applied to a subclass of
1064
dbus.service.Object, it will add alternate D-Bus attributes with
1065
interface names according to the "alt_interface_names" mapping.
1066
Usage:
1067
1068
@alternate_dbus_interfaces({"org.example.Interface":
1069
"net.example.AlternateInterface"})
1070
class SampleDBusObject(dbus.service.Object):
1071
@dbus.service.method("org.example.Interface")
1072
def SampleDBusMethod():
1073
pass
1074
1075
The above "SampleDBusMethod" on "SampleDBusObject" will be
1076
reachable via two interfaces: "org.example.Interface" and
1077
"net.example.AlternateInterface", the latter of which will have
1078
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1079
"true", unless "deprecate" is passed with a False value.
1080
1081
This works for methods and signals, and also for D-Bus properties
1082
(from DBusObjectWithProperties) and interfaces (from the
1083
dbus_interface_annotations decorator).
770
1084
"""
771
def __new__(mcs, name, bases, attr):
772
# Go through all the base classes which could have D-Bus
773
# methods, signals, or properties in them
774
for base in (b for b in bases
775
if issubclass(b, dbus.service.Object)):
776
# Go though all attributes of the base class
777
for attrname, attribute in inspect.getmembers(base):
1085
def wrapper(cls):
1086
for orig_interface_name, alt_interface_name in (
1087
alt_interface_names.iteritems()):
1088
attr = {}
1089
interface_names = set()
1090
# Go though all attributes of the class
1091
for attrname, attribute in inspect.getmembers(cls):
778
1092
# Ignore non-D-Bus attributes, and D-Bus attributes
779
1093
# with the wrong interface name
780
1094
if (not hasattr(attribute, "_dbus_interface")
781
1095
or not attribute._dbus_interface
782
.startswith("se.recompile.Mandos")):
1096
.startswith(orig_interface_name)):
783
1097
continue
784
1098
# Create an alternate D-Bus interface name based on
785
1099
# the current name
786
1100
alt_interface = (attribute._dbus_interface
787
.replace("se.recompile.Mandos",
788
"se.bsnet.fukt.Mandos"))
1101
.replace(orig_interface_name,
1102
alt_interface_name))
1103
interface_names.add(alt_interface)
789
1104
# Is this a D-Bus signal?
790
1105
if getattr(attribute, "_dbus_is_signal", False):
791
# Extract the original non-method function by
792
# black magic
1106
# Extract the original non-method undecorated
1107
# function by black magic
793
1108
nonmethod_func = (dict(
794
1109
zip(attribute.func_code.co_freevars,
795
1110
attribute.__closure__))["func"]
806
1121
nonmethod_func.func_name,
807
1122
nonmethod_func.func_defaults,
808
1123
nonmethod_func.func_closure)))
1124
# Copy annotations, if any
1125
try:
1126
new_function._dbus_annotations = (
1127
dict(attribute._dbus_annotations))
1128
except AttributeError:
1129
pass
809
1130
# Define a creator of a function to call both the
810
# old and new functions, so both the old and new
811
# signals gets sent when the function is called
1131
# original and alternate functions, so both the
1132
# original and alternate signals gets sent when
1133
# the function is called
812
1134
def fixscope(func1, func2):
813
1135
"""This function is a scope container to pass
814
1136
func1 and func2 to the "call_both" function
821
1143
return call_both
822
1144
# Create the "call_both" function and add it to
823
1145
# the class
824
attr[attrname] = fixscope(attribute,
825
new_function)
1146
attr[attrname] = fixscope(attribute, new_function)
826
1147
# Is this a D-Bus method?
827
1148
elif getattr(attribute, "_dbus_is_method", False):
828
1149
# Create a new, but exactly alike, function
839
1160
attribute.func_name,
840
1161
attribute.func_defaults,
841
1162
attribute.func_closure)))
1163
# Copy annotations, if any
1164
try:
1165
attr[attrname]._dbus_annotations = (
1166
dict(attribute._dbus_annotations))
1167
except AttributeError:
1168
pass
842
1169
# Is this a D-Bus property?
843
1170
elif getattr(attribute, "_dbus_is_property", False):
844
1171
# Create a new, but exactly alike, function
858
1185
attribute.func_name,
859
1186
attribute.func_defaults,
860
1187
attribute.func_closure)))
861
return type.__new__(mcs, name, bases, attr)
862
1188
# Copy annotations, if any
1189
try:
1190
attr[attrname]._dbus_annotations = (
1191
dict(attribute._dbus_annotations))
1192
except AttributeError:
1193
pass
1194
# Is this a D-Bus interface?
1195
elif getattr(attribute, "_dbus_is_interface", False):
1196
# Create a new, but exactly alike, function
1197
# object. Decorate it to be a new D-Bus interface
1198
# with the alternate D-Bus interface name. Add it
1199
# to the class.
1200
attr[attrname] = (dbus_interface_annotations
1201
(alt_interface)
1202
(types.FunctionType
1203
(attribute.func_code,
1204
attribute.func_globals,
1205
attribute.func_name,
1206
attribute.func_defaults,
1207
attribute.func_closure)))
1208
if deprecate:
1209
# Deprecate all alternate interfaces
1210
iname="_AlternateDBusNames_interface_annotation{0}"
1211
for interface_name in interface_names:
1212
@dbus_interface_annotations(interface_name)
1213
def func(self):
1214
return { "org.freedesktop.DBus.Deprecated":
1215
"true" }
1216
# Find an unused name
1217
for aname in (iname.format(i)
1218
for i in itertools.count()):
1219
if aname not in attr:
1220
attr[aname] = func
1221
break
1222
if interface_names:
1223
# Replace the class with a new subclass of it with
1224
# methods, signals, etc. as created above.
1225
cls = type(b"{0}Alternate".format(cls.__name__),
1226
(cls,), attr)
1227
return cls
1228
return wrapper
1229
1230
1231
@alternate_dbus_interfaces({"se.recompile.Mandos":
1232
"se.bsnet.fukt.Mandos"})
863
1233
class ClientDBus(Client, DBusObjectWithProperties):
864
1234
"""A Client class using D-Bus
865
1235
874
1244
# dbus.service.Object doesn't use super(), so we can't either.
875
1245
876
1246
def __init__(self, bus = None, *args, **kwargs):
877
self._approvals_pending = 0
878
1247
self.bus = bus
879
1248
Client.__init__(self, *args, **kwargs)
880
1249
# Only now, when this client is initialized, can it show up on
886
1255
("/clients/" + client_object_name))
887
1256
DBusObjectWithProperties.__init__(self, self.bus,
888
1257
self.dbus_object_path)
889
1258
890
1259
def notifychangeproperty(transform_func,
891
1260
dbus_name, type_func=lambda x: x,
892
1261
variant_level=1):
893
1262
""" Modify a variable so that it's a property which announces
894
1263
its changes to DBus.
895
1264
896
1265
transform_fun: Function that takes a value and a variant_level
897
1266
and transforms it to a D-Bus type.
898
1267
dbus_name: D-Bus name of the variable
915
1284
916
1285
return property(lambda self: getattr(self, attrname), setter)
917
1286
918
919
1287
expires = notifychangeproperty(datetime_to_dbus, "Expires")
920
1288
approvals_pending = notifychangeproperty(dbus.Boolean,
921
1289
"ApprovalPending",
928
1296
checker is not None)
929
1297
last_checked_ok = notifychangeproperty(datetime_to_dbus,
930
1298
"LastCheckedOK")
1299
last_checker_status = notifychangeproperty(dbus.Int16,
1300
"LastCheckerStatus")
931
1301
last_approval_request = notifychangeproperty(
932
1302
datetime_to_dbus, "LastApprovalRequest")
933
1303
approved_by_default = notifychangeproperty(dbus.Boolean,
934
1304
"ApprovedByDefault")
935
approval_delay = notifychangeproperty(dbus.UInt16,
1305
approval_delay = notifychangeproperty(dbus.UInt64,
936
1306
"ApprovalDelay",
937
1307
type_func =
938
_timedelta_to_milliseconds)
1308
timedelta_to_milliseconds)
939
1309
approval_duration = notifychangeproperty(
940
dbus.UInt16, "ApprovalDuration",
941
type_func = _timedelta_to_milliseconds)
1310
dbus.UInt64, "ApprovalDuration",
1311
type_func = timedelta_to_milliseconds)
942
1312
host = notifychangeproperty(dbus.String, "Host")
943
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1313
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
944
1314
type_func =
945
_timedelta_to_milliseconds)
1315
timedelta_to_milliseconds)
946
1316
extended_timeout = notifychangeproperty(
947
dbus.UInt16, "ExtendedTimeout",
948
type_func = _timedelta_to_milliseconds)
949
interval = notifychangeproperty(dbus.UInt16,
1317
dbus.UInt64, "ExtendedTimeout",
1318
type_func = timedelta_to_milliseconds)
1319
interval = notifychangeproperty(dbus.UInt64,
950
1320
"Interval",
951
1321
type_func =
952
_timedelta_to_milliseconds)
1322
timedelta_to_milliseconds)
953
1323
checker_command = notifychangeproperty(dbus.String, "Checker")
954
1324
955
1325
del notifychangeproperty
983
1353
*args, **kwargs)
984
1354
985
1355
def start_checker(self, *args, **kwargs):
986
old_checker = self.checker
987
if self.checker is not None:
988
old_checker_pid = self.checker.pid
989
else:
990
old_checker_pid = None
1356
old_checker_pid = getattr(self.checker, "pid", None)
991
1357
r = Client.start_checker(self, *args, **kwargs)
992
1358
# Only if new checker process was started
993
1359
if (self.checker is not None
997
1363
return r
998
1364
999
1365
def _reset_approved(self):
1000
self._approved = None
1366
self.approved = None
1001
1367
return False
1002
1368
1003
1369
def approve(self, value=True):
1004
self.send_changedstate()
1005
self._approved = value
1006
gobject.timeout_add(_timedelta_to_milliseconds
1370
self.approved = value
1371
gobject.timeout_add(timedelta_to_milliseconds
1007
1372
(self.approval_duration),
1008
1373
self._reset_approved)
1009
1374
self.send_changedstate()
1010
1375
1011
1376
## D-Bus methods, signals & properties
1012
1377
_interface = "se.recompile.Mandos.Client"
1013
1378
1379
## Interfaces
1380
1381
@dbus_interface_annotations(_interface)
1382
def _foo(self):
1383
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1384
"false"}
1385
1014
1386
## Signals
1015
1387
1016
1388
# CheckerCompleted - signal
1115
1487
access="readwrite")
1116
1488
def ApprovalDuration_dbus_property(self, value=None):
1117
1489
if value is None: # get
1118
return dbus.UInt64(_timedelta_to_milliseconds(
1490
return dbus.UInt64(timedelta_to_milliseconds(
1119
1491
self.approval_duration))
1120
1492
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1121
1493
1135
1507
def Host_dbus_property(self, value=None):
1136
1508
if value is None: # get
1137
1509
return dbus.String(self.host)
1138
self.host = value
1510
self.host = unicode(value)
1139
1511
1140
1512
# Created - property
1141
1513
@dbus_service_property(_interface, signature="s", access="read")
1142
1514
def Created_dbus_property(self):
1143
return dbus.String(datetime_to_dbus(self.created))
1515
return datetime_to_dbus(self.created)
1144
1516
1145
1517
# LastEnabled - property
1146
1518
@dbus_service_property(_interface, signature="s", access="read")
1167
1539
return
1168
1540
return datetime_to_dbus(self.last_checked_ok)
1169
1541
1542
# LastCheckerStatus - property
1543
@dbus_service_property(_interface, signature="n",
1544
access="read")
1545
def LastCheckerStatus_dbus_property(self):
1546
return dbus.Int16(self.last_checker_status)
1547
1170
1548
# Expires - property
1171
1549
@dbus_service_property(_interface, signature="s", access="read")
1172
1550
def Expires_dbus_property(self):
1183
1561
def Timeout_dbus_property(self, value=None):
1184
1562
if value is None: # get
1185
1563
return dbus.UInt64(self.timeout_milliseconds())
1564
old_timeout = self.timeout
1186
1565
self.timeout = datetime.timedelta(0, 0, 0, value)
1187
if getattr(self, "disable_initiator_tag", None) is None:
1188
return
1189
# Reschedule timeout
1190
gobject.source_remove(self.disable_initiator_tag)
1191
self.disable_initiator_tag = None
1192
self.expires = None
1193
time_to_die = _timedelta_to_milliseconds((self
1194
.last_checked_ok
1195
+ self.timeout)
1196
- datetime.datetime
1197
.utcnow())
1198
if time_to_die <= 0:
1199
# The timeout has passed
1200
self.disable()
1201
else:
1202
self.expires = (datetime.datetime.utcnow()
1203
+ datetime.timedelta(milliseconds =
1204
time_to_die))
1205
self.disable_initiator_tag = (gobject.timeout_add
1206
(time_to_die, self.disable))
1566
# Reschedule disabling
1567
if self.enabled:
1568
now = datetime.datetime.utcnow()
1569
self.expires += self.timeout - old_timeout
1570
if self.expires <= now:
1571
# The timeout has passed
1572
self.disable()
1573
else:
1574
if (getattr(self, "disable_initiator_tag", None)
1575
is None):
1576
return
1577
gobject.source_remove(self.disable_initiator_tag)
1578
self.disable_initiator_tag = (
1579
gobject.timeout_add(
1580
timedelta_to_milliseconds(self.expires - now),
1581
self.disable))
1207
1582
1208
1583
# ExtendedTimeout - property
1209
1584
@dbus_service_property(_interface, signature="t",
1222
1597
self.interval = datetime.timedelta(0, 0, 0, value)
1223
1598
if getattr(self, "checker_initiator_tag", None) is None:
1224
1599
return
1225
# Reschedule checker run
1226
gobject.source_remove(self.checker_initiator_tag)
1227
self.checker_initiator_tag = (gobject.timeout_add
1228
(value, self.start_checker))
1229
self.start_checker() # Start one now, too
1600
if self.enabled:
1601
# Reschedule checker run
1602
gobject.source_remove(self.checker_initiator_tag)
1603
self.checker_initiator_tag = (gobject.timeout_add
1604
(value, self.start_checker))
1605
self.start_checker() # Start one now, too
1230
1606
1231
1607
# Checker - property
1232
1608
@dbus_service_property(_interface, signature="s",
1234
1610
def Checker_dbus_property(self, value=None):
1235
1611
if value is None: # get
1236
1612
return dbus.String(self.checker_command)
1237
self.checker_command = value
1613
self.checker_command = unicode(value)
1238
1614
1239
1615
# CheckerRunning - property
1240
1616
@dbus_service_property(_interface, signature="b",
1269
1645
raise KeyError()
1270
1646
1271
1647
def __getattribute__(self, name):
1272
if(name == '_pipe'):
1648
if name == '_pipe':
1273
1649
return super(ProxyClient, self).__getattribute__(name)
1274
1650
self._pipe.send(('getattr', name))
1275
1651
data = self._pipe.recv()
1282
1658
return func
1283
1659
1284
1660
def __setattr__(self, name, value):
1285
if(name == '_pipe'):
1661
if name == '_pipe':
1286
1662
return super(ProxyClient, self).__setattr__(name, value)
1287
1663
self._pipe.send(('setattr', name, value))
1288
1664
1289
class ClientDBusTransitional(ClientDBus):
1290
__metaclass__ = AlternateDBusNamesMetaclass
1291
1665
1292
1666
class ClientHandler(socketserver.BaseRequestHandler, object):
1293
1667
"""A class to handle client connections.
1330
1704
logger.debug("Protocol version: %r", line)
1331
1705
try:
1332
1706
if int(line.strip().split()[0]) > 1:
1333
raise RuntimeError
1707
raise RuntimeError(line)
1334
1708
except (ValueError, IndexError, RuntimeError) as error:
1335
1709
logger.error("Unknown protocol version: %s", error)
1336
1710
return
1376
1750
client.Rejected("Disabled")
1377
1751
return
1378
1752
1379
if client._approved or not client.approval_delay:
1753
if client.approved or not client.approval_delay:
1380
1754
#We are approved or approval is disabled
1381
1755
break
1382
elif client._approved is None:
1756
elif client.approved is None:
1383
1757
logger.info("Client %s needs approval",
1384
1758
client.name)
1385
1759
if self.server.use_dbus:
1398
1772
#wait until timeout or approved
1399
1773
time = datetime.datetime.now()
1400
1774
client.changedstate.acquire()
1401
(client.changedstate.wait
1402
(float(client._timedelta_to_milliseconds(delay)
1403
/ 1000)))
1775
client.changedstate.wait(
1776
float(timedelta_to_milliseconds(delay)
1777
/ 1000))
1404
1778
client.changedstate.release()
1405
1779
time2 = datetime.datetime.now()
1406
1780
if (time2 - time) >= delay:
1422
1796
try:
1423
1797
sent = session.send(client.secret[sent_size:])
1424
1798
except gnutls.errors.GNUTLSError as error:
1425
logger.warning("gnutls send failed")
1799
logger.warning("gnutls send failed",
1800
exc_info=error)
1426
1801
return
1427
1802
logger.debug("Sent: %d, remaining: %d",
1428
1803
sent, len(client.secret)
1431
1806
1432
1807
logger.info("Sending secret to %s", client.name)
1433
1808
# bump the timeout using extended_timeout
1434
client.checked_ok(client.extended_timeout)
1809
client.bump_timeout(client.extended_timeout)
1435
1810
if self.server.use_dbus:
1436
1811
# Emit D-Bus signal
1437
1812
client.GotSecret()
1442
1817
try:
1443
1818
session.bye()
1444
1819
except gnutls.errors.GNUTLSError as error:
1445
logger.warning("GnuTLS bye failed")
1820
logger.warning("GnuTLS bye failed",
1821
exc_info=error)
1446
1822
1447
1823
@staticmethod
1448
1824
def peer_certificate(session):
1504
1880
# Convert the buffer to a Python bytestring
1505
1881
fpr = ctypes.string_at(buf, buf_len.value)
1506
1882
# Convert the bytestring to hexadecimal notation
1507
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1883
hex_fpr = binascii.hexlify(fpr).upper()
1508
1884
return hex_fpr
1509
1885
1510
1886
1513
1889
def sub_process_main(self, request, address):
1514
1890
try:
1515
1891
self.finish_request(request, address)
1516
except:
1892
except Exception:
1517
1893
self.handle_error(request, address)
1518
1894
self.close_request(request)
1519
1895
1520
1896
def process_request(self, request, address):
1521
1897
"""Start a new process to process the request."""
1522
1898
proc = multiprocessing.Process(target = self.sub_process_main,
1523
args = (request,
1524
address))
1899
args = (request, address))
1525
1900
proc.start()
1526
1901
return proc
1527
1902
1542
1917
1543
1918
def add_pipe(self, parent_pipe, proc):
1544
1919
"""Dummy function; override as necessary"""
1545
raise NotImplementedError
1920
raise NotImplementedError()
1546
1921
1547
1922
1548
1923
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1555
1930
use_ipv6: Boolean; to use IPv6 or not
1556
1931
"""
1557
1932
def __init__(self, server_address, RequestHandlerClass,
1558
interface=None, use_ipv6=True):
1933
interface=None, use_ipv6=True, socketfd=None):
1934
"""If socketfd is set, use that file descriptor instead of
1935
creating a new one with socket.socket().
1936
"""
1559
1937
self.interface = interface
1560
1938
if use_ipv6:
1561
1939
self.address_family = socket.AF_INET6
1940
if socketfd is not None:
1941
# Save the file descriptor
1942
self.socketfd = socketfd
1943
# Save the original socket.socket() function
1944
self.socket_socket = socket.socket
1945
# To implement --socket, we monkey patch socket.socket.
1946
#
1947
# (When socketserver.TCPServer is a new-style class, we
1948
# could make self.socket into a property instead of monkey
1949
# patching socket.socket.)
1950
#
1951
# Create a one-time-only replacement for socket.socket()
1952
@functools.wraps(socket.socket)
1953
def socket_wrapper(*args, **kwargs):
1954
# Restore original function so subsequent calls are
1955
# not affected.
1956
socket.socket = self.socket_socket
1957
del self.socket_socket
1958
# This time only, return a new socket object from the
1959
# saved file descriptor.
1960
return socket.fromfd(self.socketfd, *args, **kwargs)
1961
# Replace socket.socket() function with wrapper
1962
socket.socket = socket_wrapper
1963
# The socketserver.TCPServer.__init__ will call
1964
# socket.socket(), which might be our replacement,
1965
# socket_wrapper(), if socketfd was set.
1562
1966
socketserver.TCPServer.__init__(self, server_address,
1563
1967
RequestHandlerClass)
1968
1564
1969
def server_bind(self):
1565
1970
"""This overrides the normal server_bind() function
1566
1971
to bind to an interface if one was specified, and also NOT to
1574
1979
try:
1575
1980
self.socket.setsockopt(socket.SOL_SOCKET,
1576
1981
SO_BINDTODEVICE,
1577
str(self.interface
1578
+ '\0'))
1982
str(self.interface + '\0'))
1579
1983
except socket.error as error:
1580
if error[0] == errno.EPERM:
1581
logger.error("No permission to"
1582
" bind to interface %s",
1583
self.interface)
1584
elif error[0] == errno.ENOPROTOOPT:
1984
if error.errno == errno.EPERM:
1985
logger.error("No permission to bind to"
1986
" interface %s", self.interface)
1987
elif error.errno == errno.ENOPROTOOPT:
1585
1988
logger.error("SO_BINDTODEVICE not available;"
1586
1989
" cannot bind to interface %s",
1587
1990
self.interface)
1991
elif error.errno == errno.ENODEV:
1992
logger.error("Interface %s does not exist,"
1993
" cannot bind", self.interface)
1588
1994
else:
1589
1995
raise
1590
1996
# Only bind(2) the socket if we really need to.
1593
1999
if self.address_family == socket.AF_INET6:
1594
2000
any_address = "::" # in6addr_any
1595
2001
else:
1596
any_address = socket.INADDR_ANY
2002
any_address = "0.0.0.0" # INADDR_ANY
1597
2003
self.server_address = (any_address,
1598
2004
self.server_address[1])
1599
2005
elif not self.server_address[1]:
1620
2026
"""
1621
2027
def __init__(self, server_address, RequestHandlerClass,
1622
2028
interface=None, use_ipv6=True, clients=None,
1623
gnutls_priority=None, use_dbus=True):
2029
gnutls_priority=None, use_dbus=True, socketfd=None):
1624
2030
self.enabled = False
1625
2031
self.clients = clients
1626
2032
if self.clients is None:
1627
self.clients = set()
2033
self.clients = {}
1628
2034
self.use_dbus = use_dbus
1629
2035
self.gnutls_priority = gnutls_priority
1630
2036
IPv6_TCPServer.__init__(self, server_address,
1631
2037
RequestHandlerClass,
1632
2038
interface = interface,
1633
use_ipv6 = use_ipv6)
2039
use_ipv6 = use_ipv6,
2040
socketfd = socketfd)
1634
2041
def server_activate(self):
1635
2042
if self.enabled:
1636
2043
return socketserver.TCPServer.server_activate(self)
1649
2056
1650
2057
def handle_ipc(self, source, condition, parent_pipe=None,
1651
2058
proc = None, client_object=None):
1652
condition_names = {
1653
gobject.IO_IN: "IN", # There is data to read.
1654
gobject.IO_OUT: "OUT", # Data can be written (without
1655
# blocking).
1656
gobject.IO_PRI: "PRI", # There is urgent data to read.
1657
gobject.IO_ERR: "ERR", # Error condition.
1658
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1659
# broken, usually for pipes and
1660
# sockets).
1661
}
1662
conditions_string = ' | '.join(name
1663
for cond, name in
1664
condition_names.iteritems()
1665
if cond & condition)
1666
2059
# error, or the other end of multiprocessing.Pipe has closed
1667
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2060
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1668
2061
# Wait for other process to exit
1669
2062
proc.join()
1670
2063
return False
1677
2070
fpr = request[1]
1678
2071
address = request[2]
1679
2072
1680
for c in self.clients:
2073
for c in self.clients.itervalues():
1681
2074
if c.fingerprint == fpr:
1682
2075
client = c
1683
2076
break
1728
2121
return True
1729
2122
1730
2123
2124
def rfc3339_duration_to_delta(duration):
2125
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2126
2127
>>> rfc3339_duration_to_delta("P7D")
2128
datetime.timedelta(7)
2129
>>> rfc3339_duration_to_delta("PT60S")
2130
datetime.timedelta(0, 60)
2131
>>> rfc3339_duration_to_delta("PT60M")
2132
datetime.timedelta(0, 3600)
2133
>>> rfc3339_duration_to_delta("PT24H")
2134
datetime.timedelta(1)
2135
>>> rfc3339_duration_to_delta("P1W")
2136
datetime.timedelta(7)
2137
>>> rfc3339_duration_to_delta("PT5M30S")
2138
datetime.timedelta(0, 330)
2139
>>> rfc3339_duration_to_delta("P1DT3M20S")
2140
datetime.timedelta(1, 200)
2141
"""
2142
2143
# Parsing an RFC 3339 duration with regular expressions is not
2144
# possible - there would have to be multiple places for the same
2145
# values, like seconds. The current code, while more esoteric, is
2146
# cleaner without depending on a parsing library. If Python had a
2147
# built-in library for parsing we would use it, but we'd like to
2148
# avoid excessive use of external libraries.
2149
2150
# New type for defining tokens, syntax, and semantics all-in-one
2151
Token = collections.namedtuple("Token",
2152
("regexp", # To match token; if
2153
# "value" is not None,
2154
# must have a "group"
2155
# containing digits
2156
"value", # datetime.timedelta or
2157
# None
2158
"followers")) # Tokens valid after
2159
# this token
2160
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2161
# the "duration" ABNF definition in RFC 3339, Appendix A.
2162
token_end = Token(re.compile(r"$"), None, frozenset())
2163
token_second = Token(re.compile(r"(\d+)S"),
2164
datetime.timedelta(seconds=1),
2165
frozenset((token_end,)))
2166
token_minute = Token(re.compile(r"(\d+)M"),
2167
datetime.timedelta(minutes=1),
2168
frozenset((token_second, token_end)))
2169
token_hour = Token(re.compile(r"(\d+)H"),
2170
datetime.timedelta(hours=1),
2171
frozenset((token_minute, token_end)))
2172
token_time = Token(re.compile(r"T"),
2173
None,
2174
frozenset((token_hour, token_minute,
2175
token_second)))
2176
token_day = Token(re.compile(r"(\d+)D"),
2177
datetime.timedelta(days=1),
2178
frozenset((token_time, token_end)))
2179
token_month = Token(re.compile(r"(\d+)M"),
2180
datetime.timedelta(weeks=4),
2181
frozenset((token_day, token_end)))
2182
token_year = Token(re.compile(r"(\d+)Y"),
2183
datetime.timedelta(weeks=52),
2184
frozenset((token_month, token_end)))
2185
token_week = Token(re.compile(r"(\d+)W"),
2186
datetime.timedelta(weeks=1),
2187
frozenset((token_end,)))
2188
token_duration = Token(re.compile(r"P"), None,
2189
frozenset((token_year, token_month,
2190
token_day, token_time,
2191
token_week))),
2192
# Define starting values
2193
value = datetime.timedelta() # Value so far
2194
found_token = None
2195
followers = frozenset(token_duration,) # Following valid tokens
2196
s = duration # String left to parse
2197
# Loop until end token is found
2198
while found_token is not token_end:
2199
# Search for any currently valid tokens
2200
for token in followers:
2201
match = token.regexp.match(s)
2202
if match is not None:
2203
# Token found
2204
if token.value is not None:
2205
# Value found, parse digits
2206
factor = int(match.group(1), 10)
2207
# Add to value so far
2208
value += factor * token.value
2209
# Strip token from string
2210
s = token.regexp.sub("", s, 1)
2211
# Go to found token
2212
found_token = token
2213
# Set valid next tokens
2214
followers = found_token.followers
2215
break
2216
else:
2217
# No currently valid tokens were found
2218
raise ValueError("Invalid RFC 3339 duration")
2219
# End token found
2220
return value
2221
2222
1731
2223
def string_to_delta(interval):
1732
2224
"""Parse a string and return a datetime.timedelta
1733
2225
1744
2236
>>> string_to_delta('5m 30s')
1745
2237
datetime.timedelta(0, 330)
1746
2238
"""
2239
2240
try:
2241
return rfc3339_duration_to_delta(interval)
2242
except ValueError:
2243
pass
2244
1747
2245
timevalue = datetime.timedelta(0)
1748
2246
for s in interval.split():
1749
2247
try:
1760
2258
elif suffix == "w":
1761
2259
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1762
2260
else:
1763
raise ValueError("Unknown suffix %r" % suffix)
1764
except (ValueError, IndexError) as e:
2261
raise ValueError("Unknown suffix {0!r}"
2262
.format(suffix))
2263
except IndexError as e:
1765
2264
raise ValueError(*(e.args))
1766
2265
timevalue += delta
1767
2266
return timevalue
1768
2267
1769
2268
1770
def if_nametoindex(interface):
1771
"""Call the C function if_nametoindex(), or equivalent
1772
1773
Note: This function cannot accept a unicode string."""
1774
global if_nametoindex
1775
try:
1776
if_nametoindex = (ctypes.cdll.LoadLibrary
1777
(ctypes.util.find_library("c"))
1778
.if_nametoindex)
1779
except (OSError, AttributeError):
1780
logger.warning("Doing if_nametoindex the hard way")
1781
def if_nametoindex(interface):
1782
"Get an interface index the hard way, i.e. using fcntl()"
1783
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1784
with contextlib.closing(socket.socket()) as s:
1785
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1786
struct.pack(str("16s16x"),
1787
interface))
1788
interface_index = struct.unpack(str("I"),
1789
ifreq[16:20])[0]
1790
return interface_index
1791
return if_nametoindex(interface)
1792
1793
1794
2269
def daemon(nochdir = False, noclose = False):
1795
2270
"""See daemon(3). Standard BSD Unix function.
1796
2271
1804
2279
sys.exit()
1805
2280
if not noclose:
1806
2281
# Close all standard open file descriptors
1807
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2282
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1808
2283
if not stat.S_ISCHR(os.fstat(null).st_mode):
1809
2284
raise OSError(errno.ENODEV,
1810
"%s not a character device"
1811
% os.path.devnull)
2285
"{0} not a character device"
2286
.format(os.devnull))
1812
2287
os.dup2(null, sys.stdin.fileno())
1813
2288
os.dup2(null, sys.stdout.fileno())
1814
2289
os.dup2(null, sys.stderr.fileno())
1823
2298
1824
2299
parser = argparse.ArgumentParser()
1825
2300
parser.add_argument("-v", "--version", action="version",
1826
version = "%%(prog)s %s" % version,
2301
version = "%(prog)s {0}".format(version),
1827
2302
help="show version number and exit")
1828
2303
parser.add_argument("-i", "--interface", metavar="IF",
1829
2304
help="Bind to interface IF")
1835
2310
help="Run self-test")
1836
2311
parser.add_argument("--debug", action="store_true",
1837
2312
help="Debug mode; run in foreground and log"
1838
" to terminal")
2313
" to terminal", default=None)
1839
2314
parser.add_argument("--debuglevel", metavar="LEVEL",
1840
2315
help="Debug level for stdout output")
1841
2316
parser.add_argument("--priority", help="GnuTLS"
1848
2323
" files")
1849
2324
parser.add_argument("--no-dbus", action="store_false",
1850
2325
dest="use_dbus", help="Do not provide D-Bus"
1851
" system bus interface")
2326
" system bus interface", default=None)
1852
2327
parser.add_argument("--no-ipv6", action="store_false",
1853
dest="use_ipv6", help="Do not use IPv6")
2328
dest="use_ipv6", help="Do not use IPv6",
2329
default=None)
2330
parser.add_argument("--no-restore", action="store_false",
2331
dest="restore", help="Do not restore stored"
2332
" state", default=None)
2333
parser.add_argument("--socket", type=int,
2334
help="Specify a file descriptor to a network"
2335
" socket to use instead of creating one")
2336
parser.add_argument("--statedir", metavar="DIR",
2337
help="Directory to save/restore state in")
2338
parser.add_argument("--foreground", action="store_true",
2339
help="Run in foreground", default=None)
2340
parser.add_argument("--no-zeroconf", action="store_false",
2341
dest="zeroconf", help="Do not use Zeroconf",
2342
default=None)
2343
1854
2344
options = parser.parse_args()
1855
2345
1856
2346
if options.check:
1857
2347
import doctest
1858
doctest.testmod()
1859
sys.exit()
2348
fail_count, test_count = doctest.testmod()
2349
sys.exit(os.EX_OK if fail_count == 0 else 1)
1860
2350
1861
2351
# Default values for config file for server-global settings
1862
2352
server_defaults = { "interface": "",
1864
2354
"port": "",
1865
2355
"debug": "False",
1866
2356
"priority":
1867
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2357
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1868
2358
"servicename": "Mandos",
1869
2359
"use_dbus": "True",
1870
2360
"use_ipv6": "True",
1871
2361
"debuglevel": "",
2362
"restore": "True",
2363
"socket": "",
2364
"statedir": "/var/lib/mandos",
2365
"foreground": "False",
2366
"zeroconf": "True",
1872
2367
}
1873
2368
1874
2369
# Parse config file for server-global settings
1879
2374
# Convert the SafeConfigParser object to a dict
1880
2375
server_settings = server_config.defaults()
1881
2376
# Use the appropriate methods on the non-string config options
1882
for option in ("debug", "use_dbus", "use_ipv6"):
2377
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1883
2378
server_settings[option] = server_config.getboolean("DEFAULT",
1884
2379
option)
1885
2380
if server_settings["port"]:
1886
2381
server_settings["port"] = server_config.getint("DEFAULT",
1887
2382
"port")
2383
if server_settings["socket"]:
2384
server_settings["socket"] = server_config.getint("DEFAULT",
2385
"socket")
2386
# Later, stdin will, and stdout and stderr might, be dup'ed
2387
# over with an opened os.devnull. But we don't want this to
2388
# happen with a supplied network socket.
2389
if 0 <= server_settings["socket"] <= 2:
2390
server_settings["socket"] = os.dup(server_settings
2391
["socket"])
1888
2392
del server_config
1889
2393
1890
2394
# Override the settings from the config file with command line
1891
2395
# options, if set.
1892
2396
for option in ("interface", "address", "port", "debug",
1893
2397
"priority", "servicename", "configdir",
1894
"use_dbus", "use_ipv6", "debuglevel"):
2398
"use_dbus", "use_ipv6", "debuglevel", "restore",
2399
"statedir", "socket", "foreground", "zeroconf"):
1895
2400
value = getattr(options, option)
1896
2401
if value is not None:
1897
2402
server_settings[option] = value
1900
2405
for option in server_settings.keys():
1901
2406
if type(server_settings[option]) is str:
1902
2407
server_settings[option] = unicode(server_settings[option])
2408
# Force all boolean options to be boolean
2409
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2410
"foreground", "zeroconf"):
2411
server_settings[option] = bool(server_settings[option])
2412
# Debug implies foreground
2413
if server_settings["debug"]:
2414
server_settings["foreground"] = True
1903
2415
# Now we have our good server settings in "server_settings"
1904
2416
1905
2417
##################################################################
1906
2418
2419
if (not server_settings["zeroconf"] and
2420
not (server_settings["port"]
2421
or server_settings["socket"] != "")):
2422
parser.error("Needs port or socket to work without"
2423
" Zeroconf")
2424
1907
2425
# For convenience
1908
2426
debug = server_settings["debug"]
1909
2427
debuglevel = server_settings["debuglevel"]
1910
2428
use_dbus = server_settings["use_dbus"]
1911
2429
use_ipv6 = server_settings["use_ipv6"]
2430
stored_state_path = os.path.join(server_settings["statedir"],
2431
stored_state_file)
2432
foreground = server_settings["foreground"]
2433
zeroconf = server_settings["zeroconf"]
2434
2435
if debug:
2436
initlogger(debug, logging.DEBUG)
2437
else:
2438
if not debuglevel:
2439
initlogger(debug)
2440
else:
2441
level = getattr(logging, debuglevel.upper())
2442
initlogger(debug, level)
1912
2443
1913
2444
if server_settings["servicename"] != "Mandos":
1914
2445
syslogger.setFormatter(logging.Formatter
1915
('Mandos (%s) [%%(process)d]:'
1916
' %%(levelname)s: %%(message)s'
1917
% server_settings["servicename"]))
2446
('Mandos ({0}) [%(process)d]:'
2447
' %(levelname)s: %(message)s'
2448
.format(server_settings
2449
["servicename"])))
1918
2450
1919
2451
# Parse config file with clients
1920
client_defaults = { "timeout": "5m",
1921
"extended_timeout": "15m",
1922
"interval": "2m",
1923
"checker": "fping -q -- %%(host)s",
1924
"host": "",
1925
"approval_delay": "0s",
1926
"approval_duration": "1s",
1927
}
1928
client_config = configparser.SafeConfigParser(client_defaults)
2452
client_config = configparser.SafeConfigParser(Client
2453
.client_defaults)
1929
2454
client_config.read(os.path.join(server_settings["configdir"],
1930
2455
"clients.conf"))
1931
2456
1932
2457
global mandos_dbus_service
1933
2458
mandos_dbus_service = None
1934
2459
2460
socketfd = None
2461
if server_settings["socket"] != "":
2462
socketfd = server_settings["socket"]
1935
2463
tcp_server = MandosServer((server_settings["address"],
1936
2464
server_settings["port"]),
1937
2465
ClientHandler,
1940
2468
use_ipv6=use_ipv6,
1941
2469
gnutls_priority=
1942
2470
server_settings["priority"],
1943
use_dbus=use_dbus)
1944
if not debug:
1945
pidfilename = "/var/run/mandos.pid"
2471
use_dbus=use_dbus,
2472
socketfd=socketfd)
2473
if not foreground:
2474
pidfilename = "/run/mandos.pid"
2475
if not os.path.isdir("/run/."):
2476
pidfilename = "/var/run/mandos.pid"
2477
pidfile = None
1946
2478
try:
1947
2479
pidfile = open(pidfilename, "w")
1948
except IOError:
1949
logger.error("Could not open file %r", pidfilename)
2480
except IOError as e:
2481
logger.error("Could not open file %r", pidfilename,
2482
exc_info=e)
1950
2483
1951
try:
1952
uid = pwd.getpwnam("_mandos").pw_uid
1953
gid = pwd.getpwnam("_mandos").pw_gid
1954
except KeyError:
2484
for name in ("_mandos", "mandos", "nobody"):
1955
2485
try:
1956
uid = pwd.getpwnam("mandos").pw_uid
1957
gid = pwd.getpwnam("mandos").pw_gid
2486
uid = pwd.getpwnam(name).pw_uid
2487
gid = pwd.getpwnam(name).pw_gid
2488
break
1958
2489
except KeyError:
1959
try:
1960
uid = pwd.getpwnam("nobody").pw_uid
1961
gid = pwd.getpwnam("nobody").pw_gid
1962
except KeyError:
1963
uid = 65534
1964
gid = 65534
2490
continue
2491
else:
2492
uid = 65534
2493
gid = 65534
1965
2494
try:
1966
2495
os.setgid(gid)
1967
2496
os.setuid(uid)
1968
2497
except OSError as error:
1969
if error[0] != errno.EPERM:
1970
raise error
1971
1972
if not debug and not debuglevel:
1973
syslogger.setLevel(logging.WARNING)
1974
console.setLevel(logging.WARNING)
1975
if debuglevel:
1976
level = getattr(logging, debuglevel.upper())
1977
syslogger.setLevel(level)
1978
console.setLevel(level)
2498
if error.errno != errno.EPERM:
2499
raise
1979
2500
1980
2501
if debug:
1981
2502
# Enable all possible GnuTLS debugging
1992
2513
.gnutls_global_set_log_function(debug_gnutls))
1993
2514
1994
2515
# Redirect stdin so all checkers get /dev/null
1995
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2516
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1996
2517
os.dup2(null, sys.stdin.fileno())
1997
2518
if null > 2:
1998
2519
os.close(null)
1999
else:
2000
# No console logging
2001
logger.removeHandler(console)
2002
2520
2003
2521
# Need to fork before connecting to D-Bus
2004
if not debug:
2522
if not foreground:
2005
2523
# Close all input and output, do double fork, etc.
2006
2524
daemon()
2007
2525
2526
# multiprocessing will use threads, so before we use gobject we
2527
# need to inform gobject that threads will be used.
2528
gobject.threads_init()
2529
2008
2530
global main_loop
2009
2531
# From the Avahi example code
2010
DBusGMainLoop(set_as_default=True )
2532
DBusGMainLoop(set_as_default=True)
2011
2533
main_loop = gobject.MainLoop()
2012
2534
bus = dbus.SystemBus()
2013
2535
# End of Avahi example code
2019
2541
("se.bsnet.fukt.Mandos", bus,
2020
2542
do_not_queue=True))
2021
2543
except dbus.exceptions.NameExistsException as e:
2022
logger.error(unicode(e) + ", disabling D-Bus")
2544
logger.error("Disabling D-Bus:", exc_info=e)
2023
2545
use_dbus = False
2024
2546
server_settings["use_dbus"] = False
2025
2547
tcp_server.use_dbus = False
2026
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2027
service = AvahiService(name = server_settings["servicename"],
2028
servicetype = "_mandos._tcp",
2029
protocol = protocol, bus = bus)
2030
if server_settings["interface"]:
2031
service.interface = (if_nametoindex
2032
(str(server_settings["interface"])))
2548
if zeroconf:
2549
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2550
service = AvahiServiceToSyslog(name =
2551
server_settings["servicename"],
2552
servicetype = "_mandos._tcp",
2553
protocol = protocol, bus = bus)
2554
if server_settings["interface"]:
2555
service.interface = (if_nametoindex
2556
(str(server_settings["interface"])))
2033
2557
2034
2558
global multiprocessing_manager
2035
2559
multiprocessing_manager = multiprocessing.Manager()
2036
2560
2037
2561
client_class = Client
2038
2562
if use_dbus:
2039
client_class = functools.partial(ClientDBusTransitional,
2040
bus = bus)
2041
def client_config_items(config, section):
2042
special_settings = {
2043
"approved_by_default":
2044
lambda: config.getboolean(section,
2045
"approved_by_default"),
2046
}
2047
for name, value in config.items(section):
2563
client_class = functools.partial(ClientDBus, bus = bus)
2564
2565
client_settings = Client.config_parser(client_config)
2566
old_client_settings = {}
2567
clients_data = {}
2568
2569
# This is used to redirect stdout and stderr for checker processes
2570
global wnull
2571
wnull = open(os.devnull, "w") # A writable /dev/null
2572
# Only used if server is running in foreground but not in debug
2573
# mode
2574
if debug or not foreground:
2575
wnull.close()
2576
2577
# Get client data and settings from last running state.
2578
if server_settings["restore"]:
2579
try:
2580
with open(stored_state_path, "rb") as stored_state:
2581
clients_data, old_client_settings = (pickle.load
2582
(stored_state))
2583
os.remove(stored_state_path)
2584
except IOError as e:
2585
if e.errno == errno.ENOENT:
2586
logger.warning("Could not load persistent state: {0}"
2587
.format(os.strerror(e.errno)))
2588
else:
2589
logger.critical("Could not load persistent state:",
2590
exc_info=e)
2591
raise
2592
except EOFError as e:
2593
logger.warning("Could not load persistent state: "
2594
"EOFError:", exc_info=e)
2595
2596
with PGPEngine() as pgp:
2597
for client_name, client in clients_data.iteritems():
2598
# Skip removed clients
2599
if client_name not in client_settings:
2600
continue
2601
2602
# Decide which value to use after restoring saved state.
2603
# We have three different values: Old config file,
2604
# new config file, and saved state.
2605
# New config value takes precedence if it differs from old
2606
# config value, otherwise use saved state.
2607
for name, value in client_settings[client_name].items():
2608
try:
2609
# For each value in new config, check if it
2610
# differs from the old config value (Except for
2611
# the "secret" attribute)
2612
if (name != "secret" and
2613
value != old_client_settings[client_name]
2614
[name]):
2615
client[name] = value
2616
except KeyError:
2617
pass
2618
2619
# Clients who has passed its expire date can still be
2620
# enabled if its last checker was successful. Clients
2621
# whose checker succeeded before we stored its state is
2622
# assumed to have successfully run all checkers during
2623
# downtime.
2624
if client["enabled"]:
2625
if datetime.datetime.utcnow() >= client["expires"]:
2626
if not client["last_checked_ok"]:
2627
logger.warning(
2628
"disabling client {0} - Client never "
2629
"performed a successful checker"
2630
.format(client_name))
2631
client["enabled"] = False
2632
elif client["last_checker_status"] != 0:
2633
logger.warning(
2634
"disabling client {0} - Client "
2635
"last checker failed with error code {1}"
2636
.format(client_name,
2637
client["last_checker_status"]))
2638
client["enabled"] = False
2639
else:
2640
client["expires"] = (datetime.datetime
2641
.utcnow()
2642
+ client["timeout"])
2643
logger.debug("Last checker succeeded,"
2644
" keeping {0} enabled"
2645
.format(client_name))
2048
2646
try:
2049
yield (name, special_settings[name]())
2050
except KeyError:
2051
yield (name, value)
2052
2053
tcp_server.clients.update(set(
2054
client_class(name = section,
2055
config= dict(client_config_items(
2056
client_config, section)))
2057
for section in client_config.sections()))
2647
client["secret"] = (
2648
pgp.decrypt(client["encrypted_secret"],
2649
client_settings[client_name]
2650
["secret"]))
2651
except PGPError:
2652
# If decryption fails, we use secret from new settings
2653
logger.debug("Failed to decrypt {0} old secret"
2654
.format(client_name))
2655
client["secret"] = (
2656
client_settings[client_name]["secret"])
2657
2658
# Add/remove clients based on new changes made to config
2659
for client_name in (set(old_client_settings)
2660
- set(client_settings)):
2661
del clients_data[client_name]
2662
for client_name in (set(client_settings)
2663
- set(old_client_settings)):
2664
clients_data[client_name] = client_settings[client_name]
2665
2666
# Create all client objects
2667
for client_name, client in clients_data.iteritems():
2668
tcp_server.clients[client_name] = client_class(
2669
name = client_name, settings = client,
2670
server_settings = server_settings)
2671
2058
2672
if not tcp_server.clients:
2059
2673
logger.warning("No clients defined")
2060
2061
if not debug:
2062
try:
2063
with pidfile:
2064
pid = os.getpid()
2065
pidfile.write(str(pid) + "\n".encode("utf-8"))
2066
del pidfile
2067
except IOError:
2068
logger.error("Could not write to file %r with PID %d",
2069
pidfilename, pid)
2070
except NameError:
2071
# "pidfile" was never created
2072
pass
2674
2675
if not foreground:
2676
if pidfile is not None:
2677
try:
2678
with pidfile:
2679
pid = os.getpid()
2680
pidfile.write(str(pid) + "\n".encode("utf-8"))
2681
except IOError:
2682
logger.error("Could not write to file %r with PID %d",
2683
pidfilename, pid)
2684
del pidfile
2073
2685
del pidfilename
2074
2075
signal.signal(signal.SIGINT, signal.SIG_IGN)
2076
2686
2077
2687
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2078
2688
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2079
2689
2080
2690
if use_dbus:
2081
class MandosDBusService(dbus.service.Object):
2691
@alternate_dbus_interfaces({"se.recompile.Mandos":
2692
"se.bsnet.fukt.Mandos"})
2693
class MandosDBusService(DBusObjectWithProperties):
2082
2694
"""A D-Bus proxy object"""
2083
2695
def __init__(self):
2084
2696
dbus.service.Object.__init__(self, bus, "/")
2085
2697
_interface = "se.recompile.Mandos"
2086
2698
2699
@dbus_interface_annotations(_interface)
2700
def _foo(self):
2701
return { "org.freedesktop.DBus.Property"
2702
".EmitsChangedSignal":
2703
"false"}
2704
2087
2705
@dbus.service.signal(_interface, signature="o")
2088
2706
def ClientAdded(self, objpath):
2089
2707
"D-Bus signal"
2103
2721
def GetAllClients(self):
2104
2722
"D-Bus method"
2105
2723
return dbus.Array(c.dbus_object_path
2106
for c in tcp_server.clients)
2724
for c in
2725
tcp_server.clients.itervalues())
2107
2726
2108
2727
@dbus.service.method(_interface,
2109
2728
out_signature="a{oa{sv}}")
2111
2730
"D-Bus method"
2112
2731
return dbus.Dictionary(
2113
2732
((c.dbus_object_path, c.GetAll(""))
2114
for c in tcp_server.clients),
2733
for c in tcp_server.clients.itervalues()),
2115
2734
signature="oa{sv}")
2116
2735
2117
2736
@dbus.service.method(_interface, in_signature="o")
2118
2737
def RemoveClient(self, object_path):
2119
2738
"D-Bus method"
2120
for c in tcp_server.clients:
2739
for c in tcp_server.clients.itervalues():
2121
2740
if c.dbus_object_path == object_path:
2122
tcp_server.clients.remove(c)
2741
del tcp_server.clients[c.name]
2123
2742
c.remove_from_connection()
2124
2743
# Don't signal anything except ClientRemoved
2125
2744
c.disable(quiet=True)
2130
2749
2131
2750
del _interface
2132
2751
2133
class MandosDBusServiceTransitional(MandosDBusService):
2134
__metaclass__ = AlternateDBusNamesMetaclass
2135
mandos_dbus_service = MandosDBusServiceTransitional()
2752
mandos_dbus_service = MandosDBusService()
2136
2753
2137
2754
def cleanup():
2138
2755
"Cleanup function; run on exit"
2139
service.cleanup()
2756
if zeroconf:
2757
service.cleanup()
2140
2758
2141
2759
multiprocessing.active_children()
2760
wnull.close()
2761
if not (tcp_server.clients or client_settings):
2762
return
2763
2764
# Store client before exiting. Secrets are encrypted with key
2765
# based on what config file has. If config file is
2766
# removed/edited, old secret will thus be unrecovable.
2767
clients = {}
2768
with PGPEngine() as pgp:
2769
for client in tcp_server.clients.itervalues():
2770
key = client_settings[client.name]["secret"]
2771
client.encrypted_secret = pgp.encrypt(client.secret,
2772
key)
2773
client_dict = {}
2774
2775
# A list of attributes that can not be pickled
2776
# + secret.
2777
exclude = set(("bus", "changedstate", "secret",
2778
"checker", "server_settings"))
2779
for name, typ in (inspect.getmembers
2780
(dbus.service.Object)):
2781
exclude.add(name)
2782
2783
client_dict["encrypted_secret"] = (client
2784
.encrypted_secret)
2785
for attr in client.client_structure:
2786
if attr not in exclude:
2787
client_dict[attr] = getattr(client, attr)
2788
2789
clients[client.name] = client_dict
2790
del client_settings[client.name]["secret"]
2791
2792
try:
2793
with (tempfile.NamedTemporaryFile
2794
(mode='wb', suffix=".pickle", prefix='clients-',
2795
dir=os.path.dirname(stored_state_path),
2796
delete=False)) as stored_state:
2797
pickle.dump((clients, client_settings), stored_state)
2798
tempname=stored_state.name
2799
os.rename(tempname, stored_state_path)
2800
except (IOError, OSError) as e:
2801
if not debug:
2802
try:
2803
os.remove(tempname)
2804
except NameError:
2805
pass
2806
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2807
logger.warning("Could not save persistent state: {0}"
2808
.format(os.strerror(e.errno)))
2809
else:
2810
logger.warning("Could not save persistent state:",
2811
exc_info=e)
2812
raise
2813
2814
# Delete all clients, and settings from config
2142
2815
while tcp_server.clients:
2143
client = tcp_server.clients.pop()
2816
name, client = tcp_server.clients.popitem()
2144
2817
if use_dbus:
2145
2818
client.remove_from_connection()
2146
client.disable_hook = None
2147
2819
# Don't signal anything except ClientRemoved
2148
2820
client.disable(quiet=True)
2149
2821
if use_dbus:
2151
2823
mandos_dbus_service.ClientRemoved(client
2152
2824
.dbus_object_path,
2153
2825
client.name)
2826
client_settings.clear()
2154
2827
2155
2828
atexit.register(cleanup)
2156
2829
2157
for client in tcp_server.clients:
2830
for client in tcp_server.clients.itervalues():
2158
2831
if use_dbus:
2159
2832
# Emit D-Bus signal
2160
2833
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2161
client.enable()
2834
# Need to initiate checking of clients
2835
if client.enabled:
2836
client.init_checker()
2162
2837
2163
2838
tcp_server.enable()
2164
2839
tcp_server.server_activate()
2165
2840
2166
2841
# Find out what port we got
2167
service.port = tcp_server.socket.getsockname()[1]
2842
if zeroconf:
2843
service.port = tcp_server.socket.getsockname()[1]
2168
2844
if use_ipv6:
2169
2845
logger.info("Now listening on address %r, port %d,"
2170
" flowinfo %d, scope_id %d"
2171
% tcp_server.socket.getsockname())
2846
" flowinfo %d, scope_id %d",
2847
*tcp_server.socket.getsockname())
2172
2848
else: # IPv4
2173
logger.info("Now listening on address %r, port %d"
2174
% tcp_server.socket.getsockname())
2849
logger.info("Now listening on address %r, port %d",
2850
*tcp_server.socket.getsockname())
2175
2851
2176
2852
#service.interface = tcp_server.socket.getsockname()[3]
2177
2853
2178
2854
try:
2179
# From the Avahi example code
2180
try:
2181
service.activate()
2182
except dbus.exceptions.DBusException as error:
2183
logger.critical("DBusException: %s", error)
2184
cleanup()
2185
sys.exit(1)
2186
# End of Avahi example code
2855
if zeroconf:
2856
# From the Avahi example code
2857
try:
2858
service.activate()
2859
except dbus.exceptions.DBusException as error:
2860
logger.critical("D-Bus Exception", exc_info=error)
2861
cleanup()
2862
sys.exit(1)
2863
# End of Avahi example code
2187
2864
2188
2865
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2189
2866
lambda *args, **kwargs:
2193
2870
logger.debug("Starting main loop")
2194
2871
main_loop.run()
2195
2872
except AvahiError as error:
2196
logger.critical("AvahiError: %s", error)
2873
logger.critical("Avahi Error", exc_info=error)
2197
2874
cleanup()
2198
2875
sys.exit(1)
2199
2876
except KeyboardInterrupt:
2204
2881
# Must run before the D-Bus bus name gets deregistered
2205
2882
cleanup()
2206
2883
2207
2208
2884
if __name__ == '__main__':
2209
2885
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0