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- Committer: teddy at bsnet
- Date: 2011-03-21 19:34:39 UTC
- Revision ID: teddy@fukt.bsnet.se-20110321193439-lkj3kwvhmujd8lwv
* plugins.d/mandos-client.c (good_interface): Reject non-ARP
interfaces.
interfaces.
- 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,
35
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unicode_literals)
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36
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from future_builtins import *
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39
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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
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import tempfile
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import itertools
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import collections
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65
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import dbus
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import dbus.service
88
81
except ImportError:
89
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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
99
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):
106
"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):
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"""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)
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logger.setLevel(level)
136
137
138
class PGPError(Exception):
139
"""Exception if encryption/decryption fails"""
140
pass
141
142
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class PGPEngine(object):
144
"""A simple class for OpenPGP symmetric encryption & decryption"""
145
def __init__(self):
146
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
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self.gnupgargs = ['--batch',
148
'--home', self.tempdir,
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'--force-mdc',
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'--quiet',
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'--no-use-agent']
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def __enter__(self):
154
return self
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156
def __exit__(self, exc_type, exc_value, traceback):
157
self._cleanup()
158
return False
159
160
def __del__(self):
161
self._cleanup()
162
163
def _cleanup(self):
164
if self.tempdir is not None:
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# Delete contents of tempdir
166
for root, dirs, files in os.walk(self.tempdir,
167
topdown = False):
168
for filename in files:
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os.remove(os.path.join(root, filename))
170
for dirname in dirs:
171
os.rmdir(os.path.join(root, dirname))
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# Remove tempdir
173
os.rmdir(self.tempdir)
174
self.tempdir = None
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176
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
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85
version = "1.3.0"
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,
273
151
self.group = None # our entry group
274
152
self.server = None
275
153
self.bus = bus
276
self.entry_group_state_changed_match = None
277
278
def rename(self, remove=True):
154
def rename(self):
279
155
"""Derived from the Avahi example code"""
280
156
if self.rename_count >= self.max_renames:
281
157
logger.critical("No suitable Zeroconf service name found"
282
158
" after %i retries, exiting.",
283
159
self.rename_count)
284
160
raise AvahiServiceError("Too many renames")
285
self.name = str(self.server
286
.GetAlternativeServiceName(self.name))
287
self.rename_count += 1
161
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
288
162
logger.info("Changing Zeroconf service name to %r ...",
289
163
self.name)
290
if remove:
291
self.remove()
164
syslogger.setFormatter(logging.Formatter
165
('Mandos (%s) [%%(process)d]:'
166
' %%(levelname)s: %%(message)s'
167
% self.name))
168
self.remove()
292
169
try:
293
170
self.add()
294
except dbus.exceptions.DBusException as error:
295
if (error.get_dbus_name()
296
== "org.freedesktop.Avahi.CollisionError"):
297
logger.info("Local Zeroconf service name collision.")
298
return self.rename(remove=False)
299
else:
300
logger.critical("D-Bus Exception", exc_info=error)
301
self.cleanup()
302
os._exit(1)
303
171
except dbus.exceptions.DBusException, error:
172
logger.critical("DBusException: %s", error)
173
self.cleanup()
174
os._exit(1)
175
self.rename_count += 1
304
176
def remove(self):
305
177
"""Derived from the Avahi example code"""
306
if self.entry_group_state_changed_match is not None:
307
self.entry_group_state_changed_match.remove()
308
self.entry_group_state_changed_match = None
309
178
if self.group is not None:
310
179
self.group.Reset()
311
312
180
def add(self):
313
181
"""Derived from the Avahi example code"""
314
self.remove()
315
182
if self.group is None:
316
183
self.group = dbus.Interface(
317
184
self.bus.get_object(avahi.DBUS_NAME,
318
185
self.server.EntryGroupNew()),
319
186
avahi.DBUS_INTERFACE_ENTRY_GROUP)
320
self.entry_group_state_changed_match = (
321
self.group.connect_to_signal(
322
'StateChanged', self.entry_group_state_changed))
187
self.group.connect_to_signal('StateChanged',
188
self
189
.entry_group_state_changed)
323
190
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
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191
self.name, self.type)
325
192
self.group.AddService(
331
198
dbus.UInt16(self.port),
332
199
avahi.string_array_to_txt_array(self.TXT))
333
200
self.group.Commit()
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335
201
def entry_group_state_changed(self, state, error):
336
202
"""Derived from the Avahi example code"""
337
203
logger.debug("Avahi entry group state change: %i", state)
343
209
self.rename()
344
210
elif state == avahi.ENTRY_GROUP_FAILURE:
345
211
logger.critical("Avahi: Error in group state changed %s",
346
str(error))
347
raise AvahiGroupError("State changed: {!s}"
348
.format(error))
349
212
unicode(error))
213
raise AvahiGroupError("State changed: %s"
214
% unicode(error))
350
215
def cleanup(self):
351
216
"""Derived from the Avahi example code"""
352
217
if self.group is not None:
353
try:
354
self.group.Free()
355
except (dbus.exceptions.UnknownMethodException,
356
dbus.exceptions.DBusException):
357
pass
218
self.group.Free()
358
219
self.group = None
359
self.remove()
360
361
def server_state_changed(self, state, error=None):
220
def server_state_changed(self, state):
362
221
"""Derived from the Avahi example code"""
363
222
logger.debug("Avahi server state change: %i", state)
364
bad_states = { avahi.SERVER_INVALID:
365
"Zeroconf server invalid",
366
avahi.SERVER_REGISTERING: None,
367
avahi.SERVER_COLLISION:
368
"Zeroconf server name collision",
369
avahi.SERVER_FAILURE:
370
"Zeroconf server failure" }
371
if state in bad_states:
372
if bad_states[state] is not None:
373
if error is None:
374
logger.error(bad_states[state])
375
else:
376
logger.error(bad_states[state] + ": %r", error)
377
self.cleanup()
223
if state == avahi.SERVER_COLLISION:
224
logger.error("Zeroconf server name collision")
225
self.remove()
378
226
elif state == avahi.SERVER_RUNNING:
379
227
self.add()
380
else:
381
if error is None:
382
logger.debug("Unknown state: %r", state)
383
else:
384
logger.debug("Unknown state: %r: %r", state, error)
385
386
228
def activate(self):
387
229
"""Derived from the Avahi example code"""
388
230
if self.server is None:
389
231
self.server = dbus.Interface(
390
232
self.bus.get_object(avahi.DBUS_NAME,
391
avahi.DBUS_PATH_SERVER,
392
follow_name_owner_changes=True),
233
avahi.DBUS_PATH_SERVER),
393
234
avahi.DBUS_INTERFACE_SERVER)
394
235
self.server.connect_to_signal("StateChanged",
395
236
self.server_state_changed)
396
237
self.server_state_changed(self.server.GetState())
397
238
398
239
399
class AvahiServiceToSyslog(AvahiService):
400
def rename(self, *args, **kwargs):
401
"""Add the new name to the syslog messages"""
402
ret = AvahiService.rename(self, *args, **kwargs)
403
syslogger.setFormatter(logging.Formatter
404
('Mandos ({}) [%(process)d]:'
405
' %(levelname)s: %(message)s'
406
.format(self.name)))
407
return ret
408
409
410
240
class Client(object):
411
241
"""A representation of a client host served by this server.
412
242
413
243
Attributes:
414
approved: bool(); 'None' if not yet approved/disapproved
244
_approved: bool(); 'None' if not yet approved/disapproved
415
245
approval_delay: datetime.timedelta(); Time to wait for approval
416
246
approval_duration: datetime.timedelta(); Duration of one approval
417
247
checker: subprocess.Popen(); a running checker process used
424
254
instance %(name)s can be used in the command.
425
255
checker_initiator_tag: a gobject event source tag, or None
426
256
created: datetime.datetime(); (UTC) object creation
427
client_structure: Object describing what attributes a client has
428
and is used for storing the client at exit
429
257
current_checker_command: string; current running checker_command
258
disable_hook: If set, called by disable() as disable_hook(self)
430
259
disable_initiator_tag: a gobject event source tag, or None
431
260
enabled: bool()
432
261
fingerprint: string (40 or 32 hexadecimal digits); used to
435
264
interval: datetime.timedelta(); How often to start a new checker
436
265
last_approval_request: datetime.datetime(); (UTC) or None
437
266
last_checked_ok: datetime.datetime(); (UTC) or None
438
last_checker_status: integer between 0 and 255 reflecting exit
439
status of last checker. -1 reflects crashed
440
checker, -2 means no checker completed yet.
441
last_enabled: datetime.datetime(); (UTC) or None
267
last_enabled: datetime.datetime(); (UTC)
442
268
name: string; from the config file, used in log messages and
443
269
D-Bus identifiers
444
270
secret: bytestring; sent verbatim (over TLS) to client
445
271
timeout: datetime.timedelta(); How long from last_checked_ok
446
272
until this client is disabled
447
extended_timeout: extra long timeout when secret has been sent
448
273
runtime_expansions: Allowed attributes for runtime expansion.
449
expires: datetime.datetime(); time (UTC) when a client will be
450
disabled, or None
451
server_settings: The server_settings dict from main()
452
274
"""
453
275
454
276
runtime_expansions = ("approval_delay", "approval_duration",
455
"created", "enabled", "expires",
456
"fingerprint", "host", "interval",
457
"last_approval_request", "last_checked_ok",
277
"created", "enabled", "fingerprint",
278
"host", "interval", "last_checked_ok",
458
279
"last_enabled", "name", "timeout")
459
client_defaults = { "timeout": "PT5M",
460
"extended_timeout": "PT15M",
461
"interval": "PT2M",
462
"checker": "fping -q -- %%(host)s",
463
"host": "",
464
"approval_delay": "PT0S",
465
"approval_duration": "PT1S",
466
"approved_by_default": "True",
467
"enabled": "True",
468
}
469
280
470
281
@staticmethod
471
def config_parser(config):
472
"""Construct a new dict of client settings of this form:
473
{ client_name: {setting_name: value, ...}, ...}
474
with exceptions for any special settings as defined above.
475
NOTE: Must be a pure function. Must return the same result
476
value given the same arguments.
477
"""
478
settings = {}
479
for client_name in config.sections():
480
section = dict(config.items(client_name))
481
client = settings[client_name] = {}
482
483
client["host"] = section["host"]
484
# Reformat values from string types to Python types
485
client["approved_by_default"] = config.getboolean(
486
client_name, "approved_by_default")
487
client["enabled"] = config.getboolean(client_name,
488
"enabled")
489
490
# Uppercase and remove spaces from fingerprint for later
491
# comparison purposes with return value from the
492
# fingerprint() function
493
client["fingerprint"] = (section["fingerprint"].upper()
494
.replace(" ", ""))
495
if "secret" in section:
496
client["secret"] = section["secret"].decode("base64")
497
elif "secfile" in section:
498
with open(os.path.expanduser(os.path.expandvars
499
(section["secfile"])),
500
"rb") as secfile:
501
client["secret"] = secfile.read()
502
else:
503
raise TypeError("No secret or secfile for section {}"
504
.format(section))
505
client["timeout"] = string_to_delta(section["timeout"])
506
client["extended_timeout"] = string_to_delta(
507
section["extended_timeout"])
508
client["interval"] = string_to_delta(section["interval"])
509
client["approval_delay"] = string_to_delta(
510
section["approval_delay"])
511
client["approval_duration"] = string_to_delta(
512
section["approval_duration"])
513
client["checker_command"] = section["checker"]
514
client["last_approval_request"] = None
515
client["last_checked_ok"] = None
516
client["last_checker_status"] = -2
517
518
return settings
519
520
def __init__(self, settings, name = None, server_settings=None):
282
def _timedelta_to_milliseconds(td):
283
"Convert a datetime.timedelta() to milliseconds"
284
return ((td.days * 24 * 60 * 60 * 1000)
285
+ (td.seconds * 1000)
286
+ (td.microseconds // 1000))
287
288
def timeout_milliseconds(self):
289
"Return the 'timeout' attribute in milliseconds"
290
return self._timedelta_to_milliseconds(self.timeout)
291
292
def interval_milliseconds(self):
293
"Return the 'interval' attribute in milliseconds"
294
return self._timedelta_to_milliseconds(self.interval)
295
296
def approval_delay_milliseconds(self):
297
return self._timedelta_to_milliseconds(self.approval_delay)
298
299
def __init__(self, name = None, disable_hook=None, config=None):
300
"""Note: the 'checker' key in 'config' sets the
301
'checker_command' attribute and *not* the 'checker'
302
attribute."""
521
303
self.name = name
522
if server_settings is None:
523
server_settings = {}
524
self.server_settings = server_settings
525
# adding all client settings
526
for setting, value in settings.items():
527
setattr(self, setting, value)
528
529
if self.enabled:
530
if not hasattr(self, "last_enabled"):
531
self.last_enabled = datetime.datetime.utcnow()
532
if not hasattr(self, "expires"):
533
self.expires = (datetime.datetime.utcnow()
534
+ self.timeout)
535
else:
536
self.last_enabled = None
537
self.expires = None
538
304
if config is None:
305
config = {}
539
306
logger.debug("Creating client %r", self.name)
307
# Uppercase and remove spaces from fingerprint for later
308
# comparison purposes with return value from the fingerprint()
309
# function
310
self.fingerprint = (config["fingerprint"].upper()
311
.replace(" ", ""))
540
312
logger.debug(" Fingerprint: %s", self.fingerprint)
541
self.created = settings.get("created",
542
datetime.datetime.utcnow())
543
544
# attributes specific for this server instance
313
if "secret" in config:
314
self.secret = config["secret"].decode("base64")
315
elif "secfile" in config:
316
with open(os.path.expanduser(os.path.expandvars
317
(config["secfile"])),
318
"rb") as secfile:
319
self.secret = secfile.read()
320
else:
321
raise TypeError("No secret or secfile for client %s"
322
% self.name)
323
self.host = config.get("host", "")
324
self.created = datetime.datetime.utcnow()
325
self.enabled = False
326
self.last_approval_request = None
327
self.last_enabled = None
328
self.last_checked_ok = None
329
self.timeout = string_to_delta(config["timeout"])
330
self.interval = string_to_delta(config["interval"])
331
self.disable_hook = disable_hook
545
332
self.checker = None
546
333
self.checker_initiator_tag = None
547
334
self.disable_initiator_tag = None
548
335
self.checker_callback_tag = None
336
self.checker_command = config["checker"]
549
337
self.current_checker_command = None
550
self.approved = None
338
self.last_connect = None
339
self._approved = None
340
self.approved_by_default = config.get("approved_by_default",
341
True)
551
342
self.approvals_pending = 0
552
self.changedstate = (multiprocessing_manager
553
.Condition(multiprocessing_manager
554
.Lock()))
555
self.client_structure = [attr for attr in
556
self.__dict__.iterkeys()
557
if not attr.startswith("_")]
558
self.client_structure.append("client_structure")
559
560
for name, t in inspect.getmembers(type(self),
561
lambda obj:
562
isinstance(obj,
563
property)):
564
if not name.startswith("_"):
565
self.client_structure.append(name)
343
self.approval_delay = string_to_delta(
344
config["approval_delay"])
345
self.approval_duration = string_to_delta(
346
config["approval_duration"])
347
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
566
348
567
# Send notice to process children that client state has changed
568
349
def send_changedstate(self):
569
with self.changedstate:
570
self.changedstate.notify_all()
571
350
self.changedstate.acquire()
351
self.changedstate.notify_all()
352
self.changedstate.release()
353
572
354
def enable(self):
573
355
"""Start this client's checker and timeout hooks"""
574
356
if getattr(self, "enabled", False):
575
357
# Already enabled
576
358
return
577
self.expires = datetime.datetime.utcnow() + self.timeout
578
self.enabled = True
359
self.send_changedstate()
579
360
self.last_enabled = datetime.datetime.utcnow()
580
self.init_checker()
581
self.send_changedstate()
361
# Schedule a new checker to be started an 'interval' from now,
362
# and every interval from then on.
363
self.checker_initiator_tag = (gobject.timeout_add
364
(self.interval_milliseconds(),
365
self.start_checker))
366
# Schedule a disable() when 'timeout' has passed
367
self.disable_initiator_tag = (gobject.timeout_add
368
(self.timeout_milliseconds(),
369
self.disable))
370
self.enabled = True
371
# Also start a new checker *right now*.
372
self.start_checker()
582
373
583
374
def disable(self, quiet=True):
584
375
"""Disable this client."""
585
376
if not getattr(self, "enabled", False):
586
377
return False
587
378
if not quiet:
379
self.send_changedstate()
380
if not quiet:
588
381
logger.info("Disabling client %s", self.name)
589
if getattr(self, "disable_initiator_tag", None) is not None:
382
if getattr(self, "disable_initiator_tag", False):
590
383
gobject.source_remove(self.disable_initiator_tag)
591
384
self.disable_initiator_tag = None
592
self.expires = None
593
if getattr(self, "checker_initiator_tag", None) is not None:
385
if getattr(self, "checker_initiator_tag", False):
594
386
gobject.source_remove(self.checker_initiator_tag)
595
387
self.checker_initiator_tag = None
596
388
self.stop_checker()
389
if self.disable_hook:
390
self.disable_hook(self)
597
391
self.enabled = False
598
if not quiet:
599
self.send_changedstate()
600
392
# Do not run this again if called by a gobject.timeout_add
601
393
return False
602
394
603
395
def __del__(self):
396
self.disable_hook = None
604
397
self.disable()
605
398
606
def init_checker(self):
607
# Schedule a new checker to be started an 'interval' from now,
608
# and every interval from then on.
609
if self.checker_initiator_tag is not None:
610
gobject.source_remove(self.checker_initiator_tag)
611
self.checker_initiator_tag = (gobject.timeout_add
612
(int(self.interval
613
.total_seconds() * 1000),
614
self.start_checker))
615
# Schedule a disable() when 'timeout' has passed
616
if self.disable_initiator_tag is not None:
617
gobject.source_remove(self.disable_initiator_tag)
618
self.disable_initiator_tag = (gobject.timeout_add
619
(int(self.timeout
620
.total_seconds() * 1000),
621
self.disable))
622
# Also start a new checker *right now*.
623
self.start_checker()
624
625
399
def checker_callback(self, pid, condition, command):
626
400
"""The checker has completed, so take appropriate actions."""
627
401
self.checker_callback_tag = None
628
402
self.checker = None
629
403
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
631
if self.last_checker_status == 0:
404
exitstatus = os.WEXITSTATUS(condition)
405
if exitstatus == 0:
632
406
logger.info("Checker for %(name)s succeeded",
633
407
vars(self))
634
408
self.checked_ok()
636
410
logger.info("Checker for %(name)s failed",
637
411
vars(self))
638
412
else:
639
self.last_checker_status = -1
640
413
logger.warning("Checker for %(name)s crashed?",
641
414
vars(self))
642
415
643
416
def checked_ok(self):
644
"""Assert that the client has been seen, alive and well."""
417
"""Bump up the timeout for this client.
418
419
This should only be called when the client has been seen,
420
alive and well.
421
"""
645
422
self.last_checked_ok = datetime.datetime.utcnow()
646
self.last_checker_status = 0
647
self.bump_timeout()
648
649
def bump_timeout(self, timeout=None):
650
"""Bump up the timeout for this client."""
651
if timeout is None:
652
timeout = self.timeout
653
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = None
656
if getattr(self, "enabled", False):
657
self.disable_initiator_tag = (gobject.timeout_add
658
(int(timeout.total_seconds()
659
* 1000), self.disable))
660
self.expires = datetime.datetime.utcnow() + timeout
423
gobject.source_remove(self.disable_initiator_tag)
424
self.disable_initiator_tag = (gobject.timeout_add
425
(self.timeout_milliseconds(),
426
self.disable))
661
427
662
428
def need_approval(self):
663
429
self.last_approval_request = datetime.datetime.utcnow()
668
434
If a checker already exists, leave it running and do
669
435
nothing."""
670
436
# The reason for not killing a running checker is that if we
671
# did that, and if a checker (for some reason) started running
672
# slowly and taking more than 'interval' time, then the client
673
# would inevitably timeout, since no checker would get a
674
# chance to run to completion. If we instead leave running
437
# did that, then if a checker (for some reason) started
438
# running slowly and taking more than 'interval' time, the
439
# client would inevitably timeout, since no checker would get
440
# a chance to run to completion. If we instead leave running
675
441
# checkers alone, the checker would have to take more time
676
442
# than 'timeout' for the client to be disabled, which is as it
677
443
# should be.
679
445
# If a checker exists, make sure it is not a zombie
680
446
try:
681
447
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
except AttributeError:
683
pass
684
except OSError as error:
685
if error.errno != errno.ECHILD:
686
raise
448
except (AttributeError, OSError), error:
449
if (isinstance(error, OSError)
450
and error.errno != errno.ECHILD):
451
raise error
687
452
else:
688
453
if pid:
689
454
logger.warning("Checker was a zombie")
692
457
self.current_checker_command)
693
458
# Start a new checker if needed
694
459
if self.checker is None:
695
# Escape attributes for the shell
696
escaped_attrs = { attr:
697
re.escape(str(getattr(self, attr)))
698
for attr in self.runtime_expansions }
699
460
try:
700
command = self.checker_command % escaped_attrs
701
except TypeError as error:
702
logger.error('Could not format string "%s"',
703
self.checker_command, exc_info=error)
704
return True # Try again later
461
# In case checker_command has exactly one % operator
462
command = self.checker_command % self.host
463
except TypeError:
464
# Escape attributes for the shell
465
escaped_attrs = dict(
466
(attr,
467
re.escape(unicode(str(getattr(self, attr, "")),
468
errors=
469
'replace')))
470
for attr in
471
self.runtime_expansions)
472
473
try:
474
command = self.checker_command % escaped_attrs
475
except TypeError, error:
476
logger.error('Could not format string "%s":'
477
' %s', self.checker_command, error)
478
return True # Try again later
705
479
self.current_checker_command = command
706
480
try:
707
481
logger.info("Starting checker %r for %s",
710
484
# in normal mode, that is already done by daemon(),
711
485
# and in debug mode we don't want to. (Stdin is
712
486
# always replaced by /dev/null.)
713
# The exception is when not debugging but nevertheless
714
# running in the foreground; use the previously
715
# created wnull.
716
popen_args = {}
717
if (not self.server_settings["debug"]
718
and self.server_settings["foreground"]):
719
popen_args.update({"stdout": wnull,
720
"stderr": wnull })
721
487
self.checker = subprocess.Popen(command,
722
488
close_fds=True,
723
shell=True, cwd="/",
724
**popen_args)
725
except OSError as error:
726
logger.error("Failed to start subprocess",
727
exc_info=error)
728
return True
729
self.checker_callback_tag = (gobject.child_watch_add
730
(self.checker.pid,
731
self.checker_callback,
732
data=command))
733
# The checker may have completed before the gobject
734
# watch was added. Check for this.
735
try:
489
shell=True, cwd="/")
490
self.checker_callback_tag = (gobject.child_watch_add
491
(self.checker.pid,
492
self.checker_callback,
493
data=command))
494
# The checker may have completed before the gobject
495
# watch was added. Check for this.
736
496
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
737
except OSError as error:
738
if error.errno == errno.ECHILD:
739
# This should never happen
740
logger.error("Child process vanished",
741
exc_info=error)
742
return True
743
raise
744
if pid:
745
gobject.source_remove(self.checker_callback_tag)
746
self.checker_callback(pid, status, command)
497
if pid:
498
gobject.source_remove(self.checker_callback_tag)
499
self.checker_callback(pid, status, command)
500
except OSError, error:
501
logger.error("Failed to start subprocess: %s",
502
error)
747
503
# Re-run this periodically if run by gobject.timeout_add
748
504
return True
749
505
756
512
return
757
513
logger.debug("Stopping checker for %(name)s", vars(self))
758
514
try:
759
self.checker.terminate()
515
os.kill(self.checker.pid, signal.SIGTERM)
760
516
#time.sleep(0.5)
761
517
#if self.checker.poll() is None:
762
# self.checker.kill()
763
except OSError as error:
518
# os.kill(self.checker.pid, signal.SIGKILL)
519
except OSError, error:
764
520
if error.errno != errno.ESRCH: # No such process
765
521
raise
766
522
self.checker = None
767
523
768
769
524
def dbus_service_property(dbus_interface, signature="v",
770
525
access="readwrite", byte_arrays=False):
771
526
"""Decorators for marking methods of a DBusObjectWithProperties to
782
537
# "Set" method, so we fail early here:
783
538
if byte_arrays and signature != "ay":
784
539
raise ValueError("Byte arrays not supported for non-'ay'"
785
" signature {!r}".format(signature))
540
" signature %r" % signature)
786
541
def decorator(func):
787
542
func._dbus_is_property = True
788
543
func._dbus_interface = dbus_interface
796
551
return decorator
797
552
798
553
799
def dbus_interface_annotations(dbus_interface):
800
"""Decorator for marking functions returning interface annotations
801
802
Usage:
803
804
@dbus_interface_annotations("org.example.Interface")
805
def _foo(self): # Function name does not matter
806
return {"org.freedesktop.DBus.Deprecated": "true",
807
"org.freedesktop.DBus.Property.EmitsChangedSignal":
808
"false"}
809
"""
810
def decorator(func):
811
func._dbus_is_interface = True
812
func._dbus_interface = dbus_interface
813
func._dbus_name = dbus_interface
814
return func
815
return decorator
816
817
818
def dbus_annotations(annotations):
819
"""Decorator to annotate D-Bus methods, signals or properties
820
Usage:
821
822
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
823
"org.freedesktop.DBus.Property."
824
"EmitsChangedSignal": "false"})
825
@dbus_service_property("org.example.Interface", signature="b",
826
access="r")
827
def Property_dbus_property(self):
828
return dbus.Boolean(False)
829
"""
830
def decorator(func):
831
func._dbus_annotations = annotations
832
return func
833
return decorator
834
835
836
554
class DBusPropertyException(dbus.exceptions.DBusException):
837
555
"""A base class for D-Bus property-related exceptions
838
556
"""
839
pass
557
def __unicode__(self):
558
return unicode(str(self))
559
840
560
841
561
class DBusPropertyAccessException(DBusPropertyException):
842
562
"""A property's access permissions disallows an operation.
852
572
853
573
class DBusObjectWithProperties(dbus.service.Object):
854
574
"""A D-Bus object with properties.
855
575
856
576
Classes inheriting from this can use the dbus_service_property
857
577
decorator to expose methods as D-Bus properties. It exposes the
858
578
standard Get(), Set(), and GetAll() methods on the D-Bus.
859
579
"""
860
580
861
581
@staticmethod
862
def _is_dbus_thing(thing):
863
"""Returns a function testing if an attribute is a D-Bus thing
864
865
If called like _is_dbus_thing("method") it returns a function
866
suitable for use as predicate to inspect.getmembers().
867
"""
868
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
869
False)
582
def _is_dbus_property(obj):
583
return getattr(obj, "_dbus_is_property", False)
870
584
871
def _get_all_dbus_things(self, thing):
585
def _get_all_dbus_properties(self):
872
586
"""Returns a generator of (name, attribute) pairs
873
587
"""
874
return ((getattr(athing.__get__(self), "_dbus_name",
875
name),
876
athing.__get__(self))
877
for cls in self.__class__.__mro__
878
for name, athing in
879
inspect.getmembers(cls,
880
self._is_dbus_thing(thing)))
588
return ((prop._dbus_name, prop)
589
for name, prop in
590
inspect.getmembers(self, self._is_dbus_property))
881
591
882
592
def _get_dbus_property(self, interface_name, property_name):
883
593
"""Returns a bound method if one exists which is a D-Bus
884
594
property with the specified name and interface.
885
595
"""
886
for cls in self.__class__.__mro__:
887
for name, value in (inspect.getmembers
888
(cls,
889
self._is_dbus_thing("property"))):
890
if (value._dbus_name == property_name
891
and value._dbus_interface == interface_name):
892
return value.__get__(self)
893
596
for name in (property_name,
597
property_name + "_dbus_property"):
598
prop = getattr(self, name, None)
599
if (prop is None
600
or not self._is_dbus_property(prop)
601
or prop._dbus_name != property_name
602
or (interface_name and prop._dbus_interface
603
and interface_name != prop._dbus_interface)):
604
continue
605
return prop
894
606
# No such property
895
607
raise DBusPropertyNotFound(self.dbus_object_path + ":"
896
608
+ interface_name + "."
920
632
# The byte_arrays option is not supported yet on
921
633
# signatures other than "ay".
922
634
if prop._dbus_signature != "ay":
923
raise ValueError("Byte arrays not supported for non-"
924
"'ay' signature {!r}"
925
.format(prop._dbus_signature))
926
value = dbus.ByteArray(b''.join(chr(byte)
927
for byte in value))
635
raise ValueError
636
value = dbus.ByteArray(''.join(unichr(byte)
637
for byte in value))
928
638
prop(value)
929
639
930
640
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
932
642
def GetAll(self, interface_name):
933
643
"""Standard D-Bus property GetAll() method, see D-Bus
934
644
standard.
935
645
936
646
Note: Will not include properties with access="write".
937
647
"""
938
properties = {}
939
for name, prop in self._get_all_dbus_things("property"):
648
all = {}
649
for name, prop in self._get_all_dbus_properties():
940
650
if (interface_name
941
651
and interface_name != prop._dbus_interface):
942
652
# Interface non-empty but did not match
946
656
continue
947
657
value = prop()
948
658
if not hasattr(value, "variant_level"):
949
properties[name] = value
659
all[name] = value
950
660
continue
951
properties[name] = type(value)(value, variant_level=
952
value.variant_level+1)
953
return dbus.Dictionary(properties, signature="sv")
954
955
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
956
def PropertiesChanged(self, interface_name, changed_properties,
957
invalidated_properties):
958
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
959
standard.
960
"""
961
pass
661
all[name] = type(value)(value, variant_level=
662
value.variant_level+1)
663
return dbus.Dictionary(all, signature="sv")
962
664
963
665
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
964
666
out_signature="s",
965
667
path_keyword='object_path',
966
668
connection_keyword='connection')
967
669
def Introspect(self, object_path, connection):
968
"""Overloading of standard D-Bus method.
969
970
Inserts property tags and interface annotation tags.
670
"""Standard D-Bus method, overloaded to insert property tags.
971
671
"""
972
672
xmlstring = dbus.service.Object.Introspect(self, object_path,
973
673
connection)
980
680
e.setAttribute("access", prop._dbus_access)
981
681
return e
982
682
for if_tag in document.getElementsByTagName("interface"):
983
# Add property tags
984
683
for tag in (make_tag(document, name, prop)
985
684
for name, prop
986
in self._get_all_dbus_things("property")
685
in self._get_all_dbus_properties()
987
686
if prop._dbus_interface
988
687
== if_tag.getAttribute("name")):
989
688
if_tag.appendChild(tag)
990
# Add annotation tags
991
for typ in ("method", "signal", "property"):
992
for tag in if_tag.getElementsByTagName(typ):
993
annots = dict()
994
for name, prop in (self.
995
_get_all_dbus_things(typ)):
996
if (name == tag.getAttribute("name")
997
and prop._dbus_interface
998
== if_tag.getAttribute("name")):
999
annots.update(getattr
1000
(prop,
1001
"_dbus_annotations",
1002
{}))
1003
for name, value in annots.items():
1004
ann_tag = document.createElement(
1005
"annotation")
1006
ann_tag.setAttribute("name", name)
1007
ann_tag.setAttribute("value", value)
1008
tag.appendChild(ann_tag)
1009
# Add interface annotation tags
1010
for annotation, value in dict(
1011
itertools.chain.from_iterable(
1012
annotations().items()
1013
for name, annotations in
1014
self._get_all_dbus_things("interface")
1015
if name == if_tag.getAttribute("name")
1016
)).items():
1017
ann_tag = document.createElement("annotation")
1018
ann_tag.setAttribute("name", annotation)
1019
ann_tag.setAttribute("value", value)
1020
if_tag.appendChild(ann_tag)
1021
689
# Add the names to the return values for the
1022
690
# "org.freedesktop.DBus.Properties" methods
1023
691
if (if_tag.getAttribute("name")
1036
704
xmlstring = document.toxml("utf-8")
1037
705
document.unlink()
1038
706
except (AttributeError, xml.dom.DOMException,
1039
xml.parsers.expat.ExpatError) as error:
707
xml.parsers.expat.ExpatError), error:
1040
708
logger.error("Failed to override Introspection method",
1041
exc_info=error)
709
error)
1042
710
return xmlstring
1043
711
1044
712
1045
def datetime_to_dbus(dt, variant_level=0):
1046
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1047
if dt is None:
1048
return dbus.String("", variant_level = variant_level)
1049
return dbus.String(dt.isoformat(),
1050
variant_level=variant_level)
1051
1052
1053
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1054
"""A class decorator; applied to a subclass of
1055
dbus.service.Object, it will add alternate D-Bus attributes with
1056
interface names according to the "alt_interface_names" mapping.
1057
Usage:
1058
1059
@alternate_dbus_interfaces({"org.example.Interface":
1060
"net.example.AlternateInterface"})
1061
class SampleDBusObject(dbus.service.Object):
1062
@dbus.service.method("org.example.Interface")
1063
def SampleDBusMethod():
1064
pass
1065
1066
The above "SampleDBusMethod" on "SampleDBusObject" will be
1067
reachable via two interfaces: "org.example.Interface" and
1068
"net.example.AlternateInterface", the latter of which will have
1069
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1070
"true", unless "deprecate" is passed with a False value.
1071
1072
This works for methods and signals, and also for D-Bus properties
1073
(from DBusObjectWithProperties) and interfaces (from the
1074
dbus_interface_annotations decorator).
1075
"""
1076
def wrapper(cls):
1077
for orig_interface_name, alt_interface_name in (
1078
alt_interface_names.items()):
1079
attr = {}
1080
interface_names = set()
1081
# Go though all attributes of the class
1082
for attrname, attribute in inspect.getmembers(cls):
1083
# Ignore non-D-Bus attributes, and D-Bus attributes
1084
# with the wrong interface name
1085
if (not hasattr(attribute, "_dbus_interface")
1086
or not attribute._dbus_interface
1087
.startswith(orig_interface_name)):
1088
continue
1089
# Create an alternate D-Bus interface name based on
1090
# the current name
1091
alt_interface = (attribute._dbus_interface
1092
.replace(orig_interface_name,
1093
alt_interface_name))
1094
interface_names.add(alt_interface)
1095
# Is this a D-Bus signal?
1096
if getattr(attribute, "_dbus_is_signal", False):
1097
# Extract the original non-method undecorated
1098
# function by black magic
1099
nonmethod_func = (dict(
1100
zip(attribute.func_code.co_freevars,
1101
attribute.__closure__))["func"]
1102
.cell_contents)
1103
# Create a new, but exactly alike, function
1104
# object, and decorate it to be a new D-Bus signal
1105
# with the alternate D-Bus interface name
1106
new_function = (dbus.service.signal
1107
(alt_interface,
1108
attribute._dbus_signature)
1109
(types.FunctionType(
1110
nonmethod_func.func_code,
1111
nonmethod_func.func_globals,
1112
nonmethod_func.func_name,
1113
nonmethod_func.func_defaults,
1114
nonmethod_func.func_closure)))
1115
# Copy annotations, if any
1116
try:
1117
new_function._dbus_annotations = (
1118
dict(attribute._dbus_annotations))
1119
except AttributeError:
1120
pass
1121
# Define a creator of a function to call both the
1122
# original and alternate functions, so both the
1123
# original and alternate signals gets sent when
1124
# the function is called
1125
def fixscope(func1, func2):
1126
"""This function is a scope container to pass
1127
func1 and func2 to the "call_both" function
1128
outside of its arguments"""
1129
def call_both(*args, **kwargs):
1130
"""This function will emit two D-Bus
1131
signals by calling func1 and func2"""
1132
func1(*args, **kwargs)
1133
func2(*args, **kwargs)
1134
return call_both
1135
# Create the "call_both" function and add it to
1136
# the class
1137
attr[attrname] = fixscope(attribute, new_function)
1138
# Is this a D-Bus method?
1139
elif getattr(attribute, "_dbus_is_method", False):
1140
# Create a new, but exactly alike, function
1141
# object. Decorate it to be a new D-Bus method
1142
# with the alternate D-Bus interface name. Add it
1143
# to the class.
1144
attr[attrname] = (dbus.service.method
1145
(alt_interface,
1146
attribute._dbus_in_signature,
1147
attribute._dbus_out_signature)
1148
(types.FunctionType
1149
(attribute.func_code,
1150
attribute.func_globals,
1151
attribute.func_name,
1152
attribute.func_defaults,
1153
attribute.func_closure)))
1154
# Copy annotations, if any
1155
try:
1156
attr[attrname]._dbus_annotations = (
1157
dict(attribute._dbus_annotations))
1158
except AttributeError:
1159
pass
1160
# Is this a D-Bus property?
1161
elif getattr(attribute, "_dbus_is_property", False):
1162
# Create a new, but exactly alike, function
1163
# object, and decorate it to be a new D-Bus
1164
# property with the alternate D-Bus interface
1165
# name. Add it to the class.
1166
attr[attrname] = (dbus_service_property
1167
(alt_interface,
1168
attribute._dbus_signature,
1169
attribute._dbus_access,
1170
attribute
1171
._dbus_get_args_options
1172
["byte_arrays"])
1173
(types.FunctionType
1174
(attribute.func_code,
1175
attribute.func_globals,
1176
attribute.func_name,
1177
attribute.func_defaults,
1178
attribute.func_closure)))
1179
# Copy annotations, if any
1180
try:
1181
attr[attrname]._dbus_annotations = (
1182
dict(attribute._dbus_annotations))
1183
except AttributeError:
1184
pass
1185
# Is this a D-Bus interface?
1186
elif getattr(attribute, "_dbus_is_interface", False):
1187
# Create a new, but exactly alike, function
1188
# object. Decorate it to be a new D-Bus interface
1189
# with the alternate D-Bus interface name. Add it
1190
# to the class.
1191
attr[attrname] = (dbus_interface_annotations
1192
(alt_interface)
1193
(types.FunctionType
1194
(attribute.func_code,
1195
attribute.func_globals,
1196
attribute.func_name,
1197
attribute.func_defaults,
1198
attribute.func_closure)))
1199
if deprecate:
1200
# Deprecate all alternate interfaces
1201
iname="_AlternateDBusNames_interface_annotation{}"
1202
for interface_name in interface_names:
1203
@dbus_interface_annotations(interface_name)
1204
def func(self):
1205
return { "org.freedesktop.DBus.Deprecated":
1206
"true" }
1207
# Find an unused name
1208
for aname in (iname.format(i)
1209
for i in itertools.count()):
1210
if aname not in attr:
1211
attr[aname] = func
1212
break
1213
if interface_names:
1214
# Replace the class with a new subclass of it with
1215
# methods, signals, etc. as created above.
1216
cls = type(b"{}Alternate".format(cls.__name__),
1217
(cls,), attr)
1218
return cls
1219
return wrapper
1220
1221
1222
@alternate_dbus_interfaces({"se.recompile.Mandos":
1223
"se.bsnet.fukt.Mandos"})
1224
713
class ClientDBus(Client, DBusObjectWithProperties):
1225
714
"""A Client class using D-Bus
1226
715
1232
721
runtime_expansions = (Client.runtime_expansions
1233
722
+ ("dbus_object_path",))
1234
723
1235
_interface = "se.recompile.Mandos.Client"
1236
1237
724
# dbus.service.Object doesn't use super(), so we can't either.
1238
725
1239
726
def __init__(self, bus = None, *args, **kwargs):
727
self._approvals_pending = 0
1240
728
self.bus = bus
1241
729
Client.__init__(self, *args, **kwargs)
1242
730
# Only now, when this client is initialized, can it show up on
1243
731
# the D-Bus
1244
client_object_name = str(self.name).translate(
732
client_object_name = unicode(self.name).translate(
1245
733
{ord("."): ord("_"),
1246
734
ord("-"): ord("_")})
1247
735
self.dbus_object_path = (dbus.ObjectPath
1248
736
("/clients/" + client_object_name))
1249
737
DBusObjectWithProperties.__init__(self, self.bus,
1250
738
self.dbus_object_path)
1251
1252
def notifychangeproperty(transform_func,
1253
dbus_name, type_func=lambda x: x,
1254
variant_level=1, invalidate_only=False,
1255
_interface=_interface):
1256
""" Modify a variable so that it's a property which announces
1257
its changes to DBus.
1258
1259
transform_fun: Function that takes a value and a variant_level
1260
and transforms it to a D-Bus type.
1261
dbus_name: D-Bus name of the variable
1262
type_func: Function that transform the value before sending it
1263
to the D-Bus. Default: no transform
1264
variant_level: D-Bus variant level. Default: 1
1265
"""
1266
attrname = "_{}".format(dbus_name)
1267
def setter(self, value):
1268
if hasattr(self, "dbus_object_path"):
1269
if (not hasattr(self, attrname) or
1270
type_func(getattr(self, attrname, None))
1271
!= type_func(value)):
1272
if invalidate_only:
1273
self.PropertiesChanged(_interface,
1274
dbus.Dictionary(),
1275
dbus.Array
1276
((dbus_name,)))
1277
else:
1278
dbus_value = transform_func(type_func(value),
1279
variant_level
1280
=variant_level)
1281
self.PropertyChanged(dbus.String(dbus_name),
1282
dbus_value)
1283
self.PropertiesChanged(_interface,
1284
dbus.Dictionary({
1285
dbus.String(dbus_name):
1286
dbus_value }), dbus.Array())
1287
setattr(self, attrname, value)
1288
1289
return property(lambda self: getattr(self, attrname), setter)
1290
1291
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1292
approvals_pending = notifychangeproperty(dbus.Boolean,
1293
"ApprovalPending",
1294
type_func = bool)
1295
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1296
last_enabled = notifychangeproperty(datetime_to_dbus,
1297
"LastEnabled")
1298
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1299
type_func = lambda checker:
1300
checker is not None)
1301
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1302
"LastCheckedOK")
1303
last_checker_status = notifychangeproperty(dbus.Int16,
1304
"LastCheckerStatus")
1305
last_approval_request = notifychangeproperty(
1306
datetime_to_dbus, "LastApprovalRequest")
1307
approved_by_default = notifychangeproperty(dbus.Boolean,
1308
"ApprovedByDefault")
1309
approval_delay = notifychangeproperty(dbus.UInt64,
1310
"ApprovalDelay",
1311
type_func =
1312
lambda td: td.total_seconds()
1313
* 1000)
1314
approval_duration = notifychangeproperty(
1315
dbus.UInt64, "ApprovalDuration",
1316
type_func = lambda td: td.total_seconds() * 1000)
1317
host = notifychangeproperty(dbus.String, "Host")
1318
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1319
type_func = lambda td:
1320
td.total_seconds() * 1000)
1321
extended_timeout = notifychangeproperty(
1322
dbus.UInt64, "ExtendedTimeout",
1323
type_func = lambda td: td.total_seconds() * 1000)
1324
interval = notifychangeproperty(dbus.UInt64,
1325
"Interval",
1326
type_func =
1327
lambda td: td.total_seconds()
1328
* 1000)
1329
checker_command = notifychangeproperty(dbus.String, "Checker")
1330
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1331
invalidate_only=True)
1332
1333
del notifychangeproperty
739
740
def _get_approvals_pending(self):
741
return self._approvals_pending
742
def _set_approvals_pending(self, value):
743
old_value = self._approvals_pending
744
self._approvals_pending = value
745
bval = bool(value)
746
if (hasattr(self, "dbus_object_path")
747
and bval is not bool(old_value)):
748
dbus_bool = dbus.Boolean(bval, variant_level=1)
749
self.PropertyChanged(dbus.String("ApprovalPending"),
750
dbus_bool)
751
752
approvals_pending = property(_get_approvals_pending,
753
_set_approvals_pending)
754
del _get_approvals_pending, _set_approvals_pending
755
756
@staticmethod
757
def _datetime_to_dbus(dt, variant_level=0):
758
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
return dbus.String(dt.isoformat(),
760
variant_level=variant_level)
761
762
def enable(self):
763
oldstate = getattr(self, "enabled", False)
764
r = Client.enable(self)
765
if oldstate != self.enabled:
766
# Emit D-Bus signals
767
self.PropertyChanged(dbus.String("Enabled"),
768
dbus.Boolean(True, variant_level=1))
769
self.PropertyChanged(
770
dbus.String("LastEnabled"),
771
self._datetime_to_dbus(self.last_enabled,
772
variant_level=1))
773
return r
774
775
def disable(self, quiet = False):
776
oldstate = getattr(self, "enabled", False)
777
r = Client.disable(self, quiet=quiet)
778
if not quiet and oldstate != self.enabled:
779
# Emit D-Bus signal
780
self.PropertyChanged(dbus.String("Enabled"),
781
dbus.Boolean(False, variant_level=1))
782
return r
1334
783
1335
784
def __del__(self, *args, **kwargs):
1336
785
try:
1345
794
*args, **kwargs):
1346
795
self.checker_callback_tag = None
1347
796
self.checker = None
797
# Emit D-Bus signal
798
self.PropertyChanged(dbus.String("CheckerRunning"),
799
dbus.Boolean(False, variant_level=1))
1348
800
if os.WIFEXITED(condition):
1349
801
exitstatus = os.WEXITSTATUS(condition)
1350
802
# Emit D-Bus signal
1360
812
return Client.checker_callback(self, pid, condition, command,
1361
813
*args, **kwargs)
1362
814
815
def checked_ok(self, *args, **kwargs):
816
r = Client.checked_ok(self, *args, **kwargs)
817
# Emit D-Bus signal
818
self.PropertyChanged(
819
dbus.String("LastCheckedOK"),
820
(self._datetime_to_dbus(self.last_checked_ok,
821
variant_level=1)))
822
return r
823
824
def need_approval(self, *args, **kwargs):
825
r = Client.need_approval(self, *args, **kwargs)
826
# Emit D-Bus signal
827
self.PropertyChanged(
828
dbus.String("LastApprovalRequest"),
829
(self._datetime_to_dbus(self.last_approval_request,
830
variant_level=1)))
831
return r
832
1363
833
def start_checker(self, *args, **kwargs):
1364
old_checker_pid = getattr(self.checker, "pid", None)
834
old_checker = self.checker
835
if self.checker is not None:
836
old_checker_pid = self.checker.pid
837
else:
838
old_checker_pid = None
1365
839
r = Client.start_checker(self, *args, **kwargs)
1366
840
# Only if new checker process was started
1367
841
if (self.checker is not None
1368
842
and old_checker_pid != self.checker.pid):
1369
843
# Emit D-Bus signal
1370
844
self.CheckerStarted(self.current_checker_command)
845
self.PropertyChanged(
846
dbus.String("CheckerRunning"),
847
dbus.Boolean(True, variant_level=1))
1371
848
return r
1372
849
850
def stop_checker(self, *args, **kwargs):
851
old_checker = getattr(self, "checker", None)
852
r = Client.stop_checker(self, *args, **kwargs)
853
if (old_checker is not None
854
and getattr(self, "checker", None) is None):
855
self.PropertyChanged(dbus.String("CheckerRunning"),
856
dbus.Boolean(False, variant_level=1))
857
return r
858
1373
859
def _reset_approved(self):
1374
self.approved = None
860
self._approved = None
1375
861
return False
1376
862
1377
863
def approve(self, value=True):
1378
self.approved = value
1379
gobject.timeout_add(int(self.approval_duration.total_seconds()
1380
* 1000), self._reset_approved)
1381
864
self.send_changedstate()
865
self._approved = value
866
gobject.timeout_add(self._timedelta_to_milliseconds
867
(self.approval_duration),
868
self._reset_approved)
869
1382
870
1383
871
## D-Bus methods, signals & properties
1384
1385
## Interfaces
872
_interface = "se.bsnet.fukt.Mandos.Client"
1386
873
1387
874
## Signals
1388
875
1399
886
pass
1400
887
1401
888
# PropertyChanged - signal
1402
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1403
889
@dbus.service.signal(_interface, signature="sv")
1404
890
def PropertyChanged(self, property, value):
1405
891
"D-Bus signal"
1436
922
# CheckedOK - method
1437
923
@dbus.service.method(_interface)
1438
924
def CheckedOK(self):
1439
self.checked_ok()
925
return self.checked_ok()
1440
926
1441
927
# Enable - method
1442
928
@dbus.service.method(_interface)
1475
961
if value is None: # get
1476
962
return dbus.Boolean(self.approved_by_default)
1477
963
self.approved_by_default = bool(value)
964
# Emit D-Bus signal
965
self.PropertyChanged(dbus.String("ApprovedByDefault"),
966
dbus.Boolean(value, variant_level=1))
1478
967
1479
968
# ApprovalDelay - property
1480
969
@dbus_service_property(_interface, signature="t",
1481
970
access="readwrite")
1482
971
def ApprovalDelay_dbus_property(self, value=None):
1483
972
if value is None: # get
1484
return dbus.UInt64(self.approval_delay.total_seconds()
1485
* 1000)
973
return dbus.UInt64(self.approval_delay_milliseconds())
1486
974
self.approval_delay = datetime.timedelta(0, 0, 0, value)
975
# Emit D-Bus signal
976
self.PropertyChanged(dbus.String("ApprovalDelay"),
977
dbus.UInt64(value, variant_level=1))
1487
978
1488
979
# ApprovalDuration - property
1489
980
@dbus_service_property(_interface, signature="t",
1490
981
access="readwrite")
1491
982
def ApprovalDuration_dbus_property(self, value=None):
1492
983
if value is None: # get
1493
return dbus.UInt64(self.approval_duration.total_seconds()
1494
* 1000)
984
return dbus.UInt64(self._timedelta_to_milliseconds(
985
self.approval_duration))
1495
986
self.approval_duration = datetime.timedelta(0, 0, 0, value)
987
# Emit D-Bus signal
988
self.PropertyChanged(dbus.String("ApprovalDuration"),
989
dbus.UInt64(value, variant_level=1))
1496
990
1497
991
# Name - property
1498
992
@dbus_service_property(_interface, signature="s", access="read")
1510
1004
def Host_dbus_property(self, value=None):
1511
1005
if value is None: # get
1512
1006
return dbus.String(self.host)
1513
self.host = str(value)
1007
self.host = value
1008
# Emit D-Bus signal
1009
self.PropertyChanged(dbus.String("Host"),
1010
dbus.String(value, variant_level=1))
1514
1011
1515
1012
# Created - property
1516
1013
@dbus_service_property(_interface, signature="s", access="read")
1517
1014
def Created_dbus_property(self):
1518
return datetime_to_dbus(self.created)
1015
return dbus.String(self._datetime_to_dbus(self.created))
1519
1016
1520
1017
# LastEnabled - property
1521
1018
@dbus_service_property(_interface, signature="s", access="read")
1522
1019
def LastEnabled_dbus_property(self):
1523
return datetime_to_dbus(self.last_enabled)
1020
if self.last_enabled is None:
1021
return dbus.String("")
1022
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1524
1023
1525
1024
# Enabled - property
1526
1025
@dbus_service_property(_interface, signature="b",
1540
1039
if value is not None:
1541
1040
self.checked_ok()
1542
1041
return
1543
return datetime_to_dbus(self.last_checked_ok)
1544
1545
# LastCheckerStatus - property
1546
@dbus_service_property(_interface, signature="n",
1547
access="read")
1548
def LastCheckerStatus_dbus_property(self):
1549
return dbus.Int16(self.last_checker_status)
1550
1551
# Expires - property
1552
@dbus_service_property(_interface, signature="s", access="read")
1553
def Expires_dbus_property(self):
1554
return datetime_to_dbus(self.expires)
1042
if self.last_checked_ok is None:
1043
return dbus.String("")
1044
return dbus.String(self._datetime_to_dbus(self
1045
.last_checked_ok))
1555
1046
1556
1047
# LastApprovalRequest - property
1557
1048
@dbus_service_property(_interface, signature="s", access="read")
1558
1049
def LastApprovalRequest_dbus_property(self):
1559
return datetime_to_dbus(self.last_approval_request)
1050
if self.last_approval_request is None:
1051
return dbus.String("")
1052
return dbus.String(self.
1053
_datetime_to_dbus(self
1054
.last_approval_request))
1560
1055
1561
1056
# Timeout - property
1562
1057
@dbus_service_property(_interface, signature="t",
1563
1058
access="readwrite")
1564
1059
def Timeout_dbus_property(self, value=None):
1565
1060
if value is None: # get
1566
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1567
old_timeout = self.timeout
1061
return dbus.UInt64(self.timeout_milliseconds())
1568
1062
self.timeout = datetime.timedelta(0, 0, 0, value)
1569
# Reschedule disabling
1570
if self.enabled:
1571
now = datetime.datetime.utcnow()
1572
self.expires += self.timeout - old_timeout
1573
if self.expires <= now:
1574
# The timeout has passed
1575
self.disable()
1576
else:
1577
if (getattr(self, "disable_initiator_tag", None)
1578
is None):
1579
return
1580
gobject.source_remove(self.disable_initiator_tag)
1581
self.disable_initiator_tag = (
1582
gobject.timeout_add(
1583
int((self.expires - now).total_seconds()
1584
* 1000), self.disable))
1585
1586
# ExtendedTimeout - property
1587
@dbus_service_property(_interface, signature="t",
1588
access="readwrite")
1589
def ExtendedTimeout_dbus_property(self, value=None):
1590
if value is None: # get
1591
return dbus.UInt64(self.extended_timeout.total_seconds()
1592
* 1000)
1593
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1063
# Emit D-Bus signal
1064
self.PropertyChanged(dbus.String("Timeout"),
1065
dbus.UInt64(value, variant_level=1))
1066
if getattr(self, "disable_initiator_tag", None) is None:
1067
return
1068
# Reschedule timeout
1069
gobject.source_remove(self.disable_initiator_tag)
1070
self.disable_initiator_tag = None
1071
time_to_die = (self.
1072
_timedelta_to_milliseconds((self
1073
.last_checked_ok
1074
+ self.timeout)
1075
- datetime.datetime
1076
.utcnow()))
1077
if time_to_die <= 0:
1078
# The timeout has passed
1079
self.disable()
1080
else:
1081
self.disable_initiator_tag = (gobject.timeout_add
1082
(time_to_die, self.disable))
1594
1083
1595
1084
# Interval - property
1596
1085
@dbus_service_property(_interface, signature="t",
1597
1086
access="readwrite")
1598
1087
def Interval_dbus_property(self, value=None):
1599
1088
if value is None: # get
1600
return dbus.UInt64(self.interval.total_seconds() * 1000)
1089
return dbus.UInt64(self.interval_milliseconds())
1601
1090
self.interval = datetime.timedelta(0, 0, 0, value)
1091
# Emit D-Bus signal
1092
self.PropertyChanged(dbus.String("Interval"),
1093
dbus.UInt64(value, variant_level=1))
1602
1094
if getattr(self, "checker_initiator_tag", None) is None:
1603
1095
return
1604
if self.enabled:
1605
# Reschedule checker run
1606
gobject.source_remove(self.checker_initiator_tag)
1607
self.checker_initiator_tag = (gobject.timeout_add
1608
(value, self.start_checker))
1609
self.start_checker() # Start one now, too
1610
1096
# Reschedule checker run
1097
gobject.source_remove(self.checker_initiator_tag)
1098
self.checker_initiator_tag = (gobject.timeout_add
1099
(value, self.start_checker))
1100
self.start_checker() # Start one now, too
1101
1611
1102
# Checker - property
1612
1103
@dbus_service_property(_interface, signature="s",
1613
1104
access="readwrite")
1614
1105
def Checker_dbus_property(self, value=None):
1615
1106
if value is None: # get
1616
1107
return dbus.String(self.checker_command)
1617
self.checker_command = str(value)
1108
self.checker_command = value
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Checker"),
1111
dbus.String(self.checker_command,
1112
variant_level=1))
1618
1113
1619
1114
# CheckerRunning - property
1620
1115
@dbus_service_property(_interface, signature="b",
1636
1131
@dbus_service_property(_interface, signature="ay",
1637
1132
access="write", byte_arrays=True)
1638
1133
def Secret_dbus_property(self, value):
1639
self.secret = bytes(value)
1134
self.secret = str(value)
1640
1135
1641
1136
del _interface
1642
1137
1647
1142
self._pipe.send(('init', fpr, address))
1648
1143
if not self._pipe.recv():
1649
1144
raise KeyError()
1650
1145
1651
1146
def __getattribute__(self, name):
1652
if name == '_pipe':
1147
if(name == '_pipe'):
1653
1148
return super(ProxyClient, self).__getattribute__(name)
1654
1149
self._pipe.send(('getattr', name))
1655
1150
data = self._pipe.recv()
1660
1155
self._pipe.send(('funcall', name, args, kwargs))
1661
1156
return self._pipe.recv()[1]
1662
1157
return func
1663
1158
1664
1159
def __setattr__(self, name, value):
1665
if name == '_pipe':
1160
if(name == '_pipe'):
1666
1161
return super(ProxyClient, self).__setattr__(name, value)
1667
1162
self._pipe.send(('setattr', name, value))
1668
1163
1676
1171
def handle(self):
1677
1172
with contextlib.closing(self.server.child_pipe) as child_pipe:
1678
1173
logger.info("TCP connection from: %s",
1679
str(self.client_address))
1174
unicode(self.client_address))
1680
1175
logger.debug("Pipe FD: %d",
1681
1176
self.server.child_pipe.fileno())
1682
1177
1683
1178
session = (gnutls.connection
1684
1179
.ClientSession(self.request,
1685
1180
gnutls.connection
1686
1181
.X509Credentials()))
1687
1182
1688
1183
# Note: gnutls.connection.X509Credentials is really a
1689
1184
# generic GnuTLS certificate credentials object so long as
1690
1185
# no X.509 keys are added to it. Therefore, we can use it
1691
1186
# here despite using OpenPGP certificates.
1692
1187
1693
1188
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1694
1189
# "+AES-256-CBC", "+SHA1",
1695
1190
# "+COMP-NULL", "+CTYPE-OPENPGP",
1701
1196
(gnutls.library.functions
1702
1197
.gnutls_priority_set_direct(session._c_object,
1703
1198
priority, None))
1704
1199
1705
1200
# Start communication using the Mandos protocol
1706
1201
# Get protocol number
1707
1202
line = self.request.makefile().readline()
1708
1203
logger.debug("Protocol version: %r", line)
1709
1204
try:
1710
1205
if int(line.strip().split()[0]) > 1:
1711
raise RuntimeError(line)
1712
except (ValueError, IndexError, RuntimeError) as error:
1206
raise RuntimeError
1207
except (ValueError, IndexError, RuntimeError), error:
1713
1208
logger.error("Unknown protocol version: %s", error)
1714
1209
return
1715
1210
1716
1211
# Start GnuTLS connection
1717
1212
try:
1718
1213
session.handshake()
1719
except gnutls.errors.GNUTLSError as error:
1214
except gnutls.errors.GNUTLSError, error:
1720
1215
logger.warning("Handshake failed: %s", error)
1721
1216
# Do not run session.bye() here: the session is not
1722
1217
# established. Just abandon the request.
1723
1218
return
1724
1219
logger.debug("Handshake succeeded")
1725
1220
1726
1221
approval_required = False
1727
1222
try:
1728
1223
try:
1729
1224
fpr = self.fingerprint(self.peer_certificate
1730
1225
(session))
1731
except (TypeError,
1732
gnutls.errors.GNUTLSError) as error:
1226
except (TypeError, gnutls.errors.GNUTLSError), error:
1733
1227
logger.warning("Bad certificate: %s", error)
1734
1228
return
1735
1229
logger.debug("Fingerprint: %s", fpr)
1736
1230
1737
1231
try:
1738
1232
client = ProxyClient(child_pipe, fpr,
1739
1233
self.client_address)
1747
1241
1748
1242
while True:
1749
1243
if not client.enabled:
1750
logger.info("Client %s is disabled",
1244
logger.warning("Client %s is disabled",
1751
1245
client.name)
1752
1246
if self.server.use_dbus:
1753
1247
# Emit D-Bus signal
1754
client.Rejected("Disabled")
1248
client.Rejected("Disabled")
1755
1249
return
1756
1250
1757
if client.approved or not client.approval_delay:
1251
if client._approved or not client.approval_delay:
1758
1252
#We are approved or approval is disabled
1759
1253
break
1760
elif client.approved is None:
1254
elif client._approved is None:
1761
1255
logger.info("Client %s needs approval",
1762
1256
client.name)
1763
1257
if self.server.use_dbus:
1764
1258
# Emit D-Bus signal
1765
1259
client.NeedApproval(
1766
client.approval_delay.total_seconds()
1767
* 1000, client.approved_by_default)
1260
client.approval_delay_milliseconds(),
1261
client.approved_by_default)
1768
1262
else:
1769
1263
logger.warning("Client %s was not approved",
1770
1264
client.name)
1774
1268
return
1775
1269
1776
1270
#wait until timeout or approved
1271
#x = float(client._timedelta_to_milliseconds(delay))
1777
1272
time = datetime.datetime.now()
1778
1273
client.changedstate.acquire()
1779
client.changedstate.wait(delay.total_seconds())
1274
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1780
1275
client.changedstate.release()
1781
1276
time2 = datetime.datetime.now()
1782
1277
if (time2 - time) >= delay:
1797
1292
while sent_size < len(client.secret):
1798
1293
try:
1799
1294
sent = session.send(client.secret[sent_size:])
1800
except gnutls.errors.GNUTLSError as error:
1801
logger.warning("gnutls send failed",
1802
exc_info=error)
1295
except (gnutls.errors.GNUTLSError), error:
1296
logger.warning("gnutls send failed")
1803
1297
return
1804
1298
logger.debug("Sent: %d, remaining: %d",
1805
1299
sent, len(client.secret)
1806
1300
- (sent_size + sent))
1807
1301
sent_size += sent
1808
1302
1809
1303
logger.info("Sending secret to %s", client.name)
1810
# bump the timeout using extended_timeout
1811
client.bump_timeout(client.extended_timeout)
1304
# bump the timeout as if seen
1305
client.checked_ok()
1812
1306
if self.server.use_dbus:
1813
1307
# Emit D-Bus signal
1814
1308
client.GotSecret()
1818
1312
client.approvals_pending -= 1
1819
1313
try:
1820
1314
session.bye()
1821
except gnutls.errors.GNUTLSError as error:
1822
logger.warning("GnuTLS bye failed",
1823
exc_info=error)
1315
except (gnutls.errors.GNUTLSError), error:
1316
logger.warning("GnuTLS bye failed")
1824
1317
1825
1318
@staticmethod
1826
1319
def peer_certificate(session):
1882
1375
# Convert the buffer to a Python bytestring
1883
1376
fpr = ctypes.string_at(buf, buf_len.value)
1884
1377
# Convert the bytestring to hexadecimal notation
1885
hex_fpr = binascii.hexlify(fpr).upper()
1378
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1886
1379
return hex_fpr
1887
1380
1888
1381
1891
1384
def sub_process_main(self, request, address):
1892
1385
try:
1893
1386
self.finish_request(request, address)
1894
except Exception:
1387
except:
1895
1388
self.handle_error(request, address)
1896
1389
self.close_request(request)
1897
1390
1898
1391
def process_request(self, request, address):
1899
1392
"""Start a new process to process the request."""
1900
proc = multiprocessing.Process(target = self.sub_process_main,
1901
args = (request, address))
1902
proc.start()
1903
return proc
1904
1393
multiprocessing.Process(target = self.sub_process_main,
1394
args = (request, address)).start()
1905
1395
1906
1396
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1907
1397
""" adds a pipe to the MixIn """
1911
1401
This function creates a new pipe in self.pipe
1912
1402
"""
1913
1403
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1914
1915
proc = MultiprocessingMixIn.process_request(self, request,
1916
client_address)
1404
1405
super(MultiprocessingMixInWithPipe,
1406
self).process_request(request, client_address)
1917
1407
self.child_pipe.close()
1918
self.add_pipe(parent_pipe, proc)
1919
1920
def add_pipe(self, parent_pipe, proc):
1408
self.add_pipe(parent_pipe)
1409
1410
def add_pipe(self, parent_pipe):
1921
1411
"""Dummy function; override as necessary"""
1922
raise NotImplementedError()
1923
1412
raise NotImplementedError
1924
1413
1925
1414
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1926
1415
socketserver.TCPServer, object):
1932
1421
use_ipv6: Boolean; to use IPv6 or not
1933
1422
"""
1934
1423
def __init__(self, server_address, RequestHandlerClass,
1935
interface=None, use_ipv6=True, socketfd=None):
1936
"""If socketfd is set, use that file descriptor instead of
1937
creating a new one with socket.socket().
1938
"""
1424
interface=None, use_ipv6=True):
1939
1425
self.interface = interface
1940
1426
if use_ipv6:
1941
1427
self.address_family = socket.AF_INET6
1942
if socketfd is not None:
1943
# Save the file descriptor
1944
self.socketfd = socketfd
1945
# Save the original socket.socket() function
1946
self.socket_socket = socket.socket
1947
# To implement --socket, we monkey patch socket.socket.
1948
#
1949
# (When socketserver.TCPServer is a new-style class, we
1950
# could make self.socket into a property instead of monkey
1951
# patching socket.socket.)
1952
#
1953
# Create a one-time-only replacement for socket.socket()
1954
@functools.wraps(socket.socket)
1955
def socket_wrapper(*args, **kwargs):
1956
# Restore original function so subsequent calls are
1957
# not affected.
1958
socket.socket = self.socket_socket
1959
del self.socket_socket
1960
# This time only, return a new socket object from the
1961
# saved file descriptor.
1962
return socket.fromfd(self.socketfd, *args, **kwargs)
1963
# Replace socket.socket() function with wrapper
1964
socket.socket = socket_wrapper
1965
# The socketserver.TCPServer.__init__ will call
1966
# socket.socket(), which might be our replacement,
1967
# socket_wrapper(), if socketfd was set.
1968
1428
socketserver.TCPServer.__init__(self, server_address,
1969
1429
RequestHandlerClass)
1970
1971
1430
def server_bind(self):
1972
1431
"""This overrides the normal server_bind() function
1973
1432
to bind to an interface if one was specified, and also NOT to
1981
1440
try:
1982
1441
self.socket.setsockopt(socket.SOL_SOCKET,
1983
1442
SO_BINDTODEVICE,
1984
(self.interface + "\0")
1985
.encode("utf-8"))
1986
except socket.error as error:
1987
if error.errno == errno.EPERM:
1988
logger.error("No permission to bind to"
1989
" interface %s", self.interface)
1990
elif error.errno == errno.ENOPROTOOPT:
1443
str(self.interface
1444
+ '\0'))
1445
except socket.error, error:
1446
if error[0] == errno.EPERM:
1447
logger.error("No permission to"
1448
" bind to interface %s",
1449
self.interface)
1450
elif error[0] == errno.ENOPROTOOPT:
1991
1451
logger.error("SO_BINDTODEVICE not available;"
1992
1452
" cannot bind to interface %s",
1993
1453
self.interface)
1994
elif error.errno == errno.ENODEV:
1995
logger.error("Interface %s does not exist,"
1996
" cannot bind", self.interface)
1997
1454
else:
1998
1455
raise
1999
1456
# Only bind(2) the socket if we really need to.
2002
1459
if self.address_family == socket.AF_INET6:
2003
1460
any_address = "::" # in6addr_any
2004
1461
else:
2005
any_address = "0.0.0.0" # INADDR_ANY
1462
any_address = socket.INADDR_ANY
2006
1463
self.server_address = (any_address,
2007
1464
self.server_address[1])
2008
1465
elif not self.server_address[1]:
2029
1486
"""
2030
1487
def __init__(self, server_address, RequestHandlerClass,
2031
1488
interface=None, use_ipv6=True, clients=None,
2032
gnutls_priority=None, use_dbus=True, socketfd=None):
1489
gnutls_priority=None, use_dbus=True):
2033
1490
self.enabled = False
2034
1491
self.clients = clients
2035
1492
if self.clients is None:
2036
self.clients = {}
1493
self.clients = set()
2037
1494
self.use_dbus = use_dbus
2038
1495
self.gnutls_priority = gnutls_priority
2039
1496
IPv6_TCPServer.__init__(self, server_address,
2040
1497
RequestHandlerClass,
2041
1498
interface = interface,
2042
use_ipv6 = use_ipv6,
2043
socketfd = socketfd)
1499
use_ipv6 = use_ipv6)
2044
1500
def server_activate(self):
2045
1501
if self.enabled:
2046
1502
return socketserver.TCPServer.server_activate(self)
2047
2048
1503
def enable(self):
2049
1504
self.enabled = True
2050
2051
def add_pipe(self, parent_pipe, proc):
1505
def add_pipe(self, parent_pipe):
2052
1506
# Call "handle_ipc" for both data and EOF events
2053
1507
gobject.io_add_watch(parent_pipe.fileno(),
2054
1508
gobject.IO_IN | gobject.IO_HUP,
2055
1509
functools.partial(self.handle_ipc,
2056
parent_pipe =
2057
parent_pipe,
2058
proc = proc))
2059
1510
parent_pipe = parent_pipe))
1511
2060
1512
def handle_ipc(self, source, condition, parent_pipe=None,
2061
proc = None, client_object=None):
2062
# error, or the other end of multiprocessing.Pipe has closed
2063
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2064
# Wait for other process to exit
2065
proc.join()
1513
client_object=None):
1514
condition_names = {
1515
gobject.IO_IN: "IN", # There is data to read.
1516
gobject.IO_OUT: "OUT", # Data can be written (without
1517
# blocking).
1518
gobject.IO_PRI: "PRI", # There is urgent data to read.
1519
gobject.IO_ERR: "ERR", # Error condition.
1520
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1521
# broken, usually for pipes and
1522
# sockets).
1523
}
1524
conditions_string = ' | '.join(name
1525
for cond, name in
1526
condition_names.iteritems()
1527
if cond & condition)
1528
# error or the other end of multiprocessing.Pipe has closed
1529
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2066
1530
return False
2067
1531
2068
1532
# Read a request from the child
2073
1537
fpr = request[1]
2074
1538
address = request[2]
2075
1539
2076
for c in self.clients.itervalues():
1540
for c in self.clients:
2077
1541
if c.fingerprint == fpr:
2078
1542
client = c
2079
1543
break
2080
1544
else:
2081
logger.info("Client not found for fingerprint: %s, ad"
2082
"dress: %s", fpr, address)
1545
logger.warning("Client not found for fingerprint: %s, ad"
1546
"dress: %s", fpr, address)
2083
1547
if self.use_dbus:
2084
1548
# Emit D-Bus signal
2085
mandos_dbus_service.ClientNotFound(fpr,
2086
address[0])
1549
mandos_dbus_service.ClientNotFound(fpr, address[0])
2087
1550
parent_pipe.send(False)
2088
1551
return False
2089
1552
2090
1553
gobject.io_add_watch(parent_pipe.fileno(),
2091
1554
gobject.IO_IN | gobject.IO_HUP,
2092
1555
functools.partial(self.handle_ipc,
2093
parent_pipe =
2094
parent_pipe,
2095
proc = proc,
2096
client_object =
2097
client))
1556
parent_pipe = parent_pipe,
1557
client_object = client))
2098
1558
parent_pipe.send(True)
2099
# remove the old hook in favor of the new above hook on
2100
# same fileno
1559
# remove the old hook in favor of the new above hook on same fileno
2101
1560
return False
2102
1561
if command == 'funcall':
2103
1562
funcname = request[1]
2104
1563
args = request[2]
2105
1564
kwargs = request[3]
2106
1565
2107
parent_pipe.send(('data', getattr(client_object,
2108
funcname)(*args,
2109
**kwargs)))
2110
1566
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1567
2111
1568
if command == 'getattr':
2112
1569
attrname = request[1]
2113
1570
if callable(client_object.__getattribute__(attrname)):
2114
1571
parent_pipe.send(('function',))
2115
1572
else:
2116
parent_pipe.send(('data', client_object
2117
.__getattribute__(attrname)))
1573
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2118
1574
2119
1575
if command == 'setattr':
2120
1576
attrname = request[1]
2121
1577
value = request[2]
2122
1578
setattr(client_object, attrname, value)
2123
1579
2124
1580
return True
2125
1581
2126
1582
2127
def rfc3339_duration_to_delta(duration):
2128
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2129
2130
>>> rfc3339_duration_to_delta("P7D")
2131
datetime.timedelta(7)
2132
>>> rfc3339_duration_to_delta("PT60S")
2133
datetime.timedelta(0, 60)
2134
>>> rfc3339_duration_to_delta("PT60M")
2135
datetime.timedelta(0, 3600)
2136
>>> rfc3339_duration_to_delta("PT24H")
2137
datetime.timedelta(1)
2138
>>> rfc3339_duration_to_delta("P1W")
2139
datetime.timedelta(7)
2140
>>> rfc3339_duration_to_delta("PT5M30S")
2141
datetime.timedelta(0, 330)
2142
>>> rfc3339_duration_to_delta("P1DT3M20S")
2143
datetime.timedelta(1, 200)
2144
"""
2145
2146
# Parsing an RFC 3339 duration with regular expressions is not
2147
# possible - there would have to be multiple places for the same
2148
# values, like seconds. The current code, while more esoteric, is
2149
# cleaner without depending on a parsing library. If Python had a
2150
# built-in library for parsing we would use it, but we'd like to
2151
# avoid excessive use of external libraries.
2152
2153
# New type for defining tokens, syntax, and semantics all-in-one
2154
Token = collections.namedtuple("Token",
2155
("regexp", # To match token; if
2156
# "value" is not None,
2157
# must have a "group"
2158
# containing digits
2159
"value", # datetime.timedelta or
2160
# None
2161
"followers")) # Tokens valid after
2162
# this token
2163
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2164
# the "duration" ABNF definition in RFC 3339, Appendix A.
2165
token_end = Token(re.compile(r"$"), None, frozenset())
2166
token_second = Token(re.compile(r"(\d+)S"),
2167
datetime.timedelta(seconds=1),
2168
frozenset((token_end,)))
2169
token_minute = Token(re.compile(r"(\d+)M"),
2170
datetime.timedelta(minutes=1),
2171
frozenset((token_second, token_end)))
2172
token_hour = Token(re.compile(r"(\d+)H"),
2173
datetime.timedelta(hours=1),
2174
frozenset((token_minute, token_end)))
2175
token_time = Token(re.compile(r"T"),
2176
None,
2177
frozenset((token_hour, token_minute,
2178
token_second)))
2179
token_day = Token(re.compile(r"(\d+)D"),
2180
datetime.timedelta(days=1),
2181
frozenset((token_time, token_end)))
2182
token_month = Token(re.compile(r"(\d+)M"),
2183
datetime.timedelta(weeks=4),
2184
frozenset((token_day, token_end)))
2185
token_year = Token(re.compile(r"(\d+)Y"),
2186
datetime.timedelta(weeks=52),
2187
frozenset((token_month, token_end)))
2188
token_week = Token(re.compile(r"(\d+)W"),
2189
datetime.timedelta(weeks=1),
2190
frozenset((token_end,)))
2191
token_duration = Token(re.compile(r"P"), None,
2192
frozenset((token_year, token_month,
2193
token_day, token_time,
2194
token_week)))
2195
# Define starting values
2196
value = datetime.timedelta() # Value so far
2197
found_token = None
2198
followers = frozenset((token_duration,)) # Following valid tokens
2199
s = duration # String left to parse
2200
# Loop until end token is found
2201
while found_token is not token_end:
2202
# Search for any currently valid tokens
2203
for token in followers:
2204
match = token.regexp.match(s)
2205
if match is not None:
2206
# Token found
2207
if token.value is not None:
2208
# Value found, parse digits
2209
factor = int(match.group(1), 10)
2210
# Add to value so far
2211
value += factor * token.value
2212
# Strip token from string
2213
s = token.regexp.sub("", s, 1)
2214
# Go to found token
2215
found_token = token
2216
# Set valid next tokens
2217
followers = found_token.followers
2218
break
2219
else:
2220
# No currently valid tokens were found
2221
raise ValueError("Invalid RFC 3339 duration")
2222
# End token found
2223
return value
2224
2225
2226
1583
def string_to_delta(interval):
2227
1584
"""Parse a string and return a datetime.timedelta
2228
1585
2239
1596
>>> string_to_delta('5m 30s')
2240
1597
datetime.timedelta(0, 330)
2241
1598
"""
2242
2243
try:
2244
return rfc3339_duration_to_delta(interval)
2245
except ValueError:
2246
pass
2247
2248
1599
timevalue = datetime.timedelta(0)
2249
1600
for s in interval.split():
2250
1601
try:
2251
suffix = s[-1]
1602
suffix = unicode(s[-1])
2252
1603
value = int(s[:-1])
2253
1604
if suffix == "d":
2254
1605
delta = datetime.timedelta(value)
2261
1612
elif suffix == "w":
2262
1613
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2263
1614
else:
2264
raise ValueError("Unknown suffix {!r}"
2265
.format(suffix))
2266
except IndexError as e:
1615
raise ValueError("Unknown suffix %r" % suffix)
1616
except (ValueError, IndexError), e:
2267
1617
raise ValueError(*(e.args))
2268
1618
timevalue += delta
2269
1619
return timevalue
2270
1620
2271
1621
1622
def if_nametoindex(interface):
1623
"""Call the C function if_nametoindex(), or equivalent
1624
1625
Note: This function cannot accept a unicode string."""
1626
global if_nametoindex
1627
try:
1628
if_nametoindex = (ctypes.cdll.LoadLibrary
1629
(ctypes.util.find_library("c"))
1630
.if_nametoindex)
1631
except (OSError, AttributeError):
1632
logger.warning("Doing if_nametoindex the hard way")
1633
def if_nametoindex(interface):
1634
"Get an interface index the hard way, i.e. using fcntl()"
1635
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1636
with contextlib.closing(socket.socket()) as s:
1637
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
struct.pack(str("16s16x"),
1639
interface))
1640
interface_index = struct.unpack(str("I"),
1641
ifreq[16:20])[0]
1642
return interface_index
1643
return if_nametoindex(interface)
1644
1645
2272
1646
def daemon(nochdir = False, noclose = False):
2273
1647
"""See daemon(3). Standard BSD Unix function.
2274
1648
2282
1656
sys.exit()
2283
1657
if not noclose:
2284
1658
# Close all standard open file descriptors
2285
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1659
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2286
1660
if not stat.S_ISCHR(os.fstat(null).st_mode):
2287
raise OSError(errno.ENODEV, "{} not a character device"
2288
.format(os.devnull))
1661
raise OSError(errno.ENODEV,
1662
"%s not a character device"
1663
% os.path.devnull)
2289
1664
os.dup2(null, sys.stdin.fileno())
2290
1665
os.dup2(null, sys.stdout.fileno())
2291
1666
os.dup2(null, sys.stderr.fileno())
2300
1675
2301
1676
parser = argparse.ArgumentParser()
2302
1677
parser.add_argument("-v", "--version", action="version",
2303
version = "%(prog)s {}".format(version),
1678
version = "%%(prog)s %s" % version,
2304
1679
help="show version number and exit")
2305
1680
parser.add_argument("-i", "--interface", metavar="IF",
2306
1681
help="Bind to interface IF")
2312
1687
help="Run self-test")
2313
1688
parser.add_argument("--debug", action="store_true",
2314
1689
help="Debug mode; run in foreground and log"
2315
" to terminal", default=None)
1690
" to terminal")
2316
1691
parser.add_argument("--debuglevel", metavar="LEVEL",
2317
1692
help="Debug level for stdout output")
2318
1693
parser.add_argument("--priority", help="GnuTLS"
2325
1700
" files")
2326
1701
parser.add_argument("--no-dbus", action="store_false",
2327
1702
dest="use_dbus", help="Do not provide D-Bus"
2328
" system bus interface", default=None)
1703
" system bus interface")
2329
1704
parser.add_argument("--no-ipv6", action="store_false",
2330
dest="use_ipv6", help="Do not use IPv6",
2331
default=None)
2332
parser.add_argument("--no-restore", action="store_false",
2333
dest="restore", help="Do not restore stored"
2334
" state", default=None)
2335
parser.add_argument("--socket", type=int,
2336
help="Specify a file descriptor to a network"
2337
" socket to use instead of creating one")
2338
parser.add_argument("--statedir", metavar="DIR",
2339
help="Directory to save/restore state in")
2340
parser.add_argument("--foreground", action="store_true",
2341
help="Run in foreground", default=None)
2342
parser.add_argument("--no-zeroconf", action="store_false",
2343
dest="zeroconf", help="Do not use Zeroconf",
2344
default=None)
2345
1705
dest="use_ipv6", help="Do not use IPv6")
2346
1706
options = parser.parse_args()
2347
1707
2348
1708
if options.check:
2349
1709
import doctest
2350
fail_count, test_count = doctest.testmod()
2351
sys.exit(os.EX_OK if fail_count == 0 else 1)
1710
doctest.testmod()
1711
sys.exit()
2352
1712
2353
1713
# Default values for config file for server-global settings
2354
1714
server_defaults = { "interface": "",
2356
1716
"port": "",
2357
1717
"debug": "False",
2358
1718
"priority":
2359
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1719
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2360
1720
"servicename": "Mandos",
2361
1721
"use_dbus": "True",
2362
1722
"use_ipv6": "True",
2363
1723
"debuglevel": "",
2364
"restore": "True",
2365
"socket": "",
2366
"statedir": "/var/lib/mandos",
2367
"foreground": "False",
2368
"zeroconf": "True",
2369
1724
}
2370
1725
2371
1726
# Parse config file for server-global settings
2376
1731
# Convert the SafeConfigParser object to a dict
2377
1732
server_settings = server_config.defaults()
2378
1733
# Use the appropriate methods on the non-string config options
2379
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1734
for option in ("debug", "use_dbus", "use_ipv6"):
2380
1735
server_settings[option] = server_config.getboolean("DEFAULT",
2381
1736
option)
2382
1737
if server_settings["port"]:
2383
1738
server_settings["port"] = server_config.getint("DEFAULT",
2384
1739
"port")
2385
if server_settings["socket"]:
2386
server_settings["socket"] = server_config.getint("DEFAULT",
2387
"socket")
2388
# Later, stdin will, and stdout and stderr might, be dup'ed
2389
# over with an opened os.devnull. But we don't want this to
2390
# happen with a supplied network socket.
2391
if 0 <= server_settings["socket"] <= 2:
2392
server_settings["socket"] = os.dup(server_settings
2393
["socket"])
2394
1740
del server_config
2395
1741
2396
1742
# Override the settings from the config file with command line
2397
1743
# options, if set.
2398
1744
for option in ("interface", "address", "port", "debug",
2399
1745
"priority", "servicename", "configdir",
2400
"use_dbus", "use_ipv6", "debuglevel", "restore",
2401
"statedir", "socket", "foreground", "zeroconf"):
1746
"use_dbus", "use_ipv6", "debuglevel"):
2402
1747
value = getattr(options, option)
2403
1748
if value is not None:
2404
1749
server_settings[option] = value
2405
1750
del options
2406
1751
# Force all strings to be unicode
2407
1752
for option in server_settings.keys():
2408
if isinstance(server_settings[option], bytes):
2409
server_settings[option] = (server_settings[option]
2410
.decode("utf-8"))
2411
# Force all boolean options to be boolean
2412
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2413
"foreground", "zeroconf"):
2414
server_settings[option] = bool(server_settings[option])
2415
# Debug implies foreground
2416
if server_settings["debug"]:
2417
server_settings["foreground"] = True
1753
if type(server_settings[option]) is str:
1754
server_settings[option] = unicode(server_settings[option])
2418
1755
# Now we have our good server settings in "server_settings"
2419
1756
2420
1757
##################################################################
2421
1758
2422
if (not server_settings["zeroconf"] and
2423
not (server_settings["port"]
2424
or server_settings["socket"] != "")):
2425
parser.error("Needs port or socket to work without"
2426
" Zeroconf")
2427
2428
1759
# For convenience
2429
1760
debug = server_settings["debug"]
2430
1761
debuglevel = server_settings["debuglevel"]
2431
1762
use_dbus = server_settings["use_dbus"]
2432
1763
use_ipv6 = server_settings["use_ipv6"]
2433
stored_state_path = os.path.join(server_settings["statedir"],
2434
stored_state_file)
2435
foreground = server_settings["foreground"]
2436
zeroconf = server_settings["zeroconf"]
2437
2438
if debug:
2439
initlogger(debug, logging.DEBUG)
2440
else:
2441
if not debuglevel:
2442
initlogger(debug)
2443
else:
2444
level = getattr(logging, debuglevel.upper())
2445
initlogger(debug, level)
2446
1764
2447
1765
if server_settings["servicename"] != "Mandos":
2448
1766
syslogger.setFormatter(logging.Formatter
2449
('Mandos ({}) [%(process)d]:'
2450
' %(levelname)s: %(message)s'
2451
.format(server_settings
2452
["servicename"])))
1767
('Mandos (%s) [%%(process)d]:'
1768
' %%(levelname)s: %%(message)s'
1769
% server_settings["servicename"]))
2453
1770
2454
1771
# Parse config file with clients
2455
client_config = configparser.SafeConfigParser(Client
2456
.client_defaults)
1772
client_defaults = { "timeout": "1h",
1773
"interval": "5m",
1774
"checker": "fping -q -- %%(host)s",
1775
"host": "",
1776
"approval_delay": "0s",
1777
"approval_duration": "1s",
1778
}
1779
client_config = configparser.SafeConfigParser(client_defaults)
2457
1780
client_config.read(os.path.join(server_settings["configdir"],
2458
1781
"clients.conf"))
2459
1782
2460
1783
global mandos_dbus_service
2461
1784
mandos_dbus_service = None
2462
1785
2463
socketfd = None
2464
if server_settings["socket"] != "":
2465
socketfd = server_settings["socket"]
2466
1786
tcp_server = MandosServer((server_settings["address"],
2467
1787
server_settings["port"]),
2468
1788
ClientHandler,
2471
1791
use_ipv6=use_ipv6,
2472
1792
gnutls_priority=
2473
1793
server_settings["priority"],
2474
use_dbus=use_dbus,
2475
socketfd=socketfd)
2476
if not foreground:
2477
pidfilename = "/run/mandos.pid"
2478
if not os.path.isdir("/run/."):
2479
pidfilename = "/var/run/mandos.pid"
2480
pidfile = None
1794
use_dbus=use_dbus)
1795
if not debug:
1796
pidfilename = "/var/run/mandos.pid"
2481
1797
try:
2482
1798
pidfile = open(pidfilename, "w")
2483
except IOError as e:
2484
logger.error("Could not open file %r", pidfilename,
2485
exc_info=e)
1799
except IOError:
1800
logger.error("Could not open file %r", pidfilename)
2486
1801
2487
for name in ("_mandos", "mandos", "nobody"):
1802
try:
1803
uid = pwd.getpwnam("_mandos").pw_uid
1804
gid = pwd.getpwnam("_mandos").pw_gid
1805
except KeyError:
2488
1806
try:
2489
uid = pwd.getpwnam(name).pw_uid
2490
gid = pwd.getpwnam(name).pw_gid
2491
break
1807
uid = pwd.getpwnam("mandos").pw_uid
1808
gid = pwd.getpwnam("mandos").pw_gid
2492
1809
except KeyError:
2493
continue
2494
else:
2495
uid = 65534
2496
gid = 65534
1810
try:
1811
uid = pwd.getpwnam("nobody").pw_uid
1812
gid = pwd.getpwnam("nobody").pw_gid
1813
except KeyError:
1814
uid = 65534
1815
gid = 65534
2497
1816
try:
2498
1817
os.setgid(gid)
2499
1818
os.setuid(uid)
2500
except OSError as error:
2501
if error.errno != errno.EPERM:
2502
raise
1819
except OSError, error:
1820
if error[0] != errno.EPERM:
1821
raise error
2503
1822
1823
if not debug and not debuglevel:
1824
syslogger.setLevel(logging.WARNING)
1825
console.setLevel(logging.WARNING)
1826
if debuglevel:
1827
level = getattr(logging, debuglevel.upper())
1828
syslogger.setLevel(level)
1829
console.setLevel(level)
1830
2504
1831
if debug:
2505
1832
# Enable all possible GnuTLS debugging
2506
1833
2516
1843
.gnutls_global_set_log_function(debug_gnutls))
2517
1844
2518
1845
# Redirect stdin so all checkers get /dev/null
2519
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1846
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2520
1847
os.dup2(null, sys.stdin.fileno())
2521
1848
if null > 2:
2522
1849
os.close(null)
1850
else:
1851
# No console logging
1852
logger.removeHandler(console)
2523
1853
2524
1854
# Need to fork before connecting to D-Bus
2525
if not foreground:
1855
if not debug:
2526
1856
# Close all input and output, do double fork, etc.
2527
1857
daemon()
2528
1858
2529
# multiprocessing will use threads, so before we use gobject we
2530
# need to inform gobject that threads will be used.
2531
gobject.threads_init()
2532
2533
1859
global main_loop
2534
1860
# From the Avahi example code
2535
DBusGMainLoop(set_as_default=True)
1861
DBusGMainLoop(set_as_default=True )
2536
1862
main_loop = gobject.MainLoop()
2537
1863
bus = dbus.SystemBus()
2538
1864
# End of Avahi example code
2539
1865
if use_dbus:
2540
1866
try:
2541
bus_name = dbus.service.BusName("se.recompile.Mandos",
1867
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2542
1868
bus, do_not_queue=True)
2543
old_bus_name = (dbus.service.BusName
2544
("se.bsnet.fukt.Mandos", bus,
2545
do_not_queue=True))
2546
except dbus.exceptions.NameExistsException as e:
2547
logger.error("Disabling D-Bus:", exc_info=e)
1869
except dbus.exceptions.NameExistsException, e:
1870
logger.error(unicode(e) + ", disabling D-Bus")
2548
1871
use_dbus = False
2549
1872
server_settings["use_dbus"] = False
2550
1873
tcp_server.use_dbus = False
2551
if zeroconf:
2552
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2553
service = AvahiServiceToSyslog(name =
2554
server_settings["servicename"],
2555
servicetype = "_mandos._tcp",
2556
protocol = protocol, bus = bus)
2557
if server_settings["interface"]:
2558
service.interface = (if_nametoindex
2559
(server_settings["interface"]
2560
.encode("utf-8")))
1874
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1875
service = AvahiService(name = server_settings["servicename"],
1876
servicetype = "_mandos._tcp",
1877
protocol = protocol, bus = bus)
1878
if server_settings["interface"]:
1879
service.interface = (if_nametoindex
1880
(str(server_settings["interface"])))
2561
1881
2562
1882
global multiprocessing_manager
2563
1883
multiprocessing_manager = multiprocessing.Manager()
2565
1885
client_class = Client
2566
1886
if use_dbus:
2567
1887
client_class = functools.partial(ClientDBus, bus = bus)
2568
2569
client_settings = Client.config_parser(client_config)
2570
old_client_settings = {}
2571
clients_data = {}
2572
2573
# This is used to redirect stdout and stderr for checker processes
2574
global wnull
2575
wnull = open(os.devnull, "w") # A writable /dev/null
2576
# Only used if server is running in foreground but not in debug
2577
# mode
2578
if debug or not foreground:
2579
wnull.close()
2580
2581
# Get client data and settings from last running state.
2582
if server_settings["restore"]:
2583
try:
2584
with open(stored_state_path, "rb") as stored_state:
2585
clients_data, old_client_settings = (pickle.load
2586
(stored_state))
2587
os.remove(stored_state_path)
2588
except IOError as e:
2589
if e.errno == errno.ENOENT:
2590
logger.warning("Could not load persistent state: {}"
2591
.format(os.strerror(e.errno)))
2592
else:
2593
logger.critical("Could not load persistent state:",
2594
exc_info=e)
2595
raise
2596
except EOFError as e:
2597
logger.warning("Could not load persistent state: "
2598
"EOFError:", exc_info=e)
2599
2600
with PGPEngine() as pgp:
2601
for client_name, client in clients_data.items():
2602
# Skip removed clients
2603
if client_name not in client_settings:
2604
continue
2605
2606
# Decide which value to use after restoring saved state.
2607
# We have three different values: Old config file,
2608
# new config file, and saved state.
2609
# New config value takes precedence if it differs from old
2610
# config value, otherwise use saved state.
2611
for name, value in client_settings[client_name].items():
2612
try:
2613
# For each value in new config, check if it
2614
# differs from the old config value (Except for
2615
# the "secret" attribute)
2616
if (name != "secret" and
2617
value != old_client_settings[client_name]
2618
[name]):
2619
client[name] = value
2620
except KeyError:
2621
pass
2622
2623
# Clients who has passed its expire date can still be
2624
# enabled if its last checker was successful. Clients
2625
# whose checker succeeded before we stored its state is
2626
# assumed to have successfully run all checkers during
2627
# downtime.
2628
if client["enabled"]:
2629
if datetime.datetime.utcnow() >= client["expires"]:
2630
if not client["last_checked_ok"]:
2631
logger.warning(
2632
"disabling client {} - Client never "
2633
"performed a successful checker"
2634
.format(client_name))
2635
client["enabled"] = False
2636
elif client["last_checker_status"] != 0:
2637
logger.warning(
2638
"disabling client {} - Client last"
2639
" checker failed with error code {}"
2640
.format(client_name,
2641
client["last_checker_status"]))
2642
client["enabled"] = False
2643
else:
2644
client["expires"] = (datetime.datetime
2645
.utcnow()
2646
+ client["timeout"])
2647
logger.debug("Last checker succeeded,"
2648
" keeping {} enabled"
2649
.format(client_name))
1888
def client_config_items(config, section):
1889
special_settings = {
1890
"approved_by_default":
1891
lambda: config.getboolean(section,
1892
"approved_by_default"),
1893
}
1894
for name, value in config.items(section):
2650
1895
try:
2651
client["secret"] = (
2652
pgp.decrypt(client["encrypted_secret"],
2653
client_settings[client_name]
2654
["secret"]))
2655
except PGPError:
2656
# If decryption fails, we use secret from new settings
2657
logger.debug("Failed to decrypt {} old secret"
2658
.format(client_name))
2659
client["secret"] = (
2660
client_settings[client_name]["secret"])
2661
2662
# Add/remove clients based on new changes made to config
2663
for client_name in (set(old_client_settings)
2664
- set(client_settings)):
2665
del clients_data[client_name]
2666
for client_name in (set(client_settings)
2667
- set(old_client_settings)):
2668
clients_data[client_name] = client_settings[client_name]
2669
2670
# Create all client objects
2671
for client_name, client in clients_data.items():
2672
tcp_server.clients[client_name] = client_class(
2673
name = client_name, settings = client,
2674
server_settings = server_settings)
2675
1896
yield (name, special_settings[name]())
1897
except KeyError:
1898
yield (name, value)
1899
1900
tcp_server.clients.update(set(
1901
client_class(name = section,
1902
config= dict(client_config_items(
1903
client_config, section)))
1904
for section in client_config.sections()))
2676
1905
if not tcp_server.clients:
2677
1906
logger.warning("No clients defined")
2678
2679
if not foreground:
2680
if pidfile is not None:
2681
try:
2682
with pidfile:
2683
pid = os.getpid()
2684
pidfile.write("{}\n".format(pid).encode("utf-8"))
2685
except IOError:
2686
logger.error("Could not write to file %r with PID %d",
2687
pidfilename, pid)
2688
del pidfile
1907
1908
if not debug:
1909
try:
1910
with pidfile:
1911
pid = os.getpid()
1912
pidfile.write(str(pid) + "\n".encode("utf-8"))
1913
del pidfile
1914
except IOError:
1915
logger.error("Could not write to file %r with PID %d",
1916
pidfilename, pid)
1917
except NameError:
1918
# "pidfile" was never created
1919
pass
2689
1920
del pidfilename
2690
1921
1922
signal.signal(signal.SIGINT, signal.SIG_IGN)
1923
2691
1924
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2692
1925
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2693
1926
2694
1927
if use_dbus:
2695
@alternate_dbus_interfaces({"se.recompile.Mandos":
2696
"se.bsnet.fukt.Mandos"})
2697
class MandosDBusService(DBusObjectWithProperties):
1928
class MandosDBusService(dbus.service.Object):
2698
1929
"""A D-Bus proxy object"""
2699
1930
def __init__(self):
2700
1931
dbus.service.Object.__init__(self, bus, "/")
2701
_interface = "se.recompile.Mandos"
2702
2703
@dbus_interface_annotations(_interface)
2704
def _foo(self):
2705
return { "org.freedesktop.DBus.Property"
2706
".EmitsChangedSignal":
2707
"false"}
1932
_interface = "se.bsnet.fukt.Mandos"
2708
1933
2709
1934
@dbus.service.signal(_interface, signature="o")
2710
1935
def ClientAdded(self, objpath):
2725
1950
def GetAllClients(self):
2726
1951
"D-Bus method"
2727
1952
return dbus.Array(c.dbus_object_path
2728
for c in
2729
tcp_server.clients.itervalues())
1953
for c in tcp_server.clients)
2730
1954
2731
1955
@dbus.service.method(_interface,
2732
1956
out_signature="a{oa{sv}}")
2733
1957
def GetAllClientsWithProperties(self):
2734
1958
"D-Bus method"
2735
1959
return dbus.Dictionary(
2736
{ c.dbus_object_path: c.GetAll("")
2737
for c in tcp_server.clients.itervalues() },
1960
((c.dbus_object_path, c.GetAll(""))
1961
for c in tcp_server.clients),
2738
1962
signature="oa{sv}")
2739
1963
2740
1964
@dbus.service.method(_interface, in_signature="o")
2741
1965
def RemoveClient(self, object_path):
2742
1966
"D-Bus method"
2743
for c in tcp_server.clients.itervalues():
1967
for c in tcp_server.clients:
2744
1968
if c.dbus_object_path == object_path:
2745
del tcp_server.clients[c.name]
1969
tcp_server.clients.remove(c)
2746
1970
c.remove_from_connection()
2747
1971
# Don't signal anything except ClientRemoved
2748
1972
c.disable(quiet=True)
2757
1981
2758
1982
def cleanup():
2759
1983
"Cleanup function; run on exit"
2760
if zeroconf:
2761
service.cleanup()
2762
2763
multiprocessing.active_children()
2764
wnull.close()
2765
if not (tcp_server.clients or client_settings):
2766
return
2767
2768
# Store client before exiting. Secrets are encrypted with key
2769
# based on what config file has. If config file is
2770
# removed/edited, old secret will thus be unrecovable.
2771
clients = {}
2772
with PGPEngine() as pgp:
2773
for client in tcp_server.clients.itervalues():
2774
key = client_settings[client.name]["secret"]
2775
client.encrypted_secret = pgp.encrypt(client.secret,
2776
key)
2777
client_dict = {}
2778
2779
# A list of attributes that can not be pickled
2780
# + secret.
2781
exclude = { "bus", "changedstate", "secret",
2782
"checker", "server_settings" }
2783
for name, typ in (inspect.getmembers
2784
(dbus.service.Object)):
2785
exclude.add(name)
2786
2787
client_dict["encrypted_secret"] = (client
2788
.encrypted_secret)
2789
for attr in client.client_structure:
2790
if attr not in exclude:
2791
client_dict[attr] = getattr(client, attr)
2792
2793
clients[client.name] = client_dict
2794
del client_settings[client.name]["secret"]
2795
2796
try:
2797
with (tempfile.NamedTemporaryFile
2798
(mode='wb', suffix=".pickle", prefix='clients-',
2799
dir=os.path.dirname(stored_state_path),
2800
delete=False)) as stored_state:
2801
pickle.dump((clients, client_settings), stored_state)
2802
tempname=stored_state.name
2803
os.rename(tempname, stored_state_path)
2804
except (IOError, OSError) as e:
2805
if not debug:
2806
try:
2807
os.remove(tempname)
2808
except NameError:
2809
pass
2810
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2811
logger.warning("Could not save persistent state: {}"
2812
.format(os.strerror(e.errno)))
2813
else:
2814
logger.warning("Could not save persistent state:",
2815
exc_info=e)
2816
raise
2817
2818
# Delete all clients, and settings from config
1984
service.cleanup()
1985
2819
1986
while tcp_server.clients:
2820
name, client = tcp_server.clients.popitem()
1987
client = tcp_server.clients.pop()
2821
1988
if use_dbus:
2822
1989
client.remove_from_connection()
1990
client.disable_hook = None
2823
1991
# Don't signal anything except ClientRemoved
2824
1992
client.disable(quiet=True)
2825
1993
if use_dbus:
2826
1994
# Emit D-Bus signal
2827
mandos_dbus_service.ClientRemoved(client
2828
.dbus_object_path,
1995
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2829
1996
client.name)
2830
client_settings.clear()
2831
1997
2832
1998
atexit.register(cleanup)
2833
1999
2834
for client in tcp_server.clients.itervalues():
2000
for client in tcp_server.clients:
2835
2001
if use_dbus:
2836
2002
# Emit D-Bus signal
2837
2003
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2838
# Need to initiate checking of clients
2839
if client.enabled:
2840
client.init_checker()
2004
client.enable()
2841
2005
2842
2006
tcp_server.enable()
2843
2007
tcp_server.server_activate()
2844
2008
2845
2009
# Find out what port we got
2846
if zeroconf:
2847
service.port = tcp_server.socket.getsockname()[1]
2010
service.port = tcp_server.socket.getsockname()[1]
2848
2011
if use_ipv6:
2849
2012
logger.info("Now listening on address %r, port %d,"
2850
" flowinfo %d, scope_id %d",
2851
*tcp_server.socket.getsockname())
2013
" flowinfo %d, scope_id %d"
2014
% tcp_server.socket.getsockname())
2852
2015
else: # IPv4
2853
logger.info("Now listening on address %r, port %d",
2854
*tcp_server.socket.getsockname())
2016
logger.info("Now listening on address %r, port %d"
2017
% tcp_server.socket.getsockname())
2855
2018
2856
2019
#service.interface = tcp_server.socket.getsockname()[3]
2857
2020
2858
2021
try:
2859
if zeroconf:
2860
# From the Avahi example code
2861
try:
2862
service.activate()
2863
except dbus.exceptions.DBusException as error:
2864
logger.critical("D-Bus Exception", exc_info=error)
2865
cleanup()
2866
sys.exit(1)
2867
# End of Avahi example code
2022
# From the Avahi example code
2023
try:
2024
service.activate()
2025
except dbus.exceptions.DBusException, error:
2026
logger.critical("DBusException: %s", error)
2027
cleanup()
2028
sys.exit(1)
2029
# End of Avahi example code
2868
2030
2869
2031
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2870
2032
lambda *args, **kwargs:
2873
2035
2874
2036
logger.debug("Starting main loop")
2875
2037
main_loop.run()
2876
except AvahiError as error:
2877
logger.critical("Avahi Error", exc_info=error)
2038
except AvahiError, error:
2039
logger.critical("AvahiError: %s", error)
2878
2040
cleanup()
2879
2041
sys.exit(1)
2880
2042
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0