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- Committer: Teddy Hogeborn
- Date: 2011-02-27 17:26:35 UTC
- Revision ID: teddy@fukt.bsnet.se-20110227172635-hw1sire7k3vuo1co
Update copyright year to "2011" wherever appropriate.
- 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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3
#
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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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34
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from __future__ import (division, absolute_import, print_function,
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unicode_literals)
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36
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from future_builtins import *
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39
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import SocketServer as socketserver
40
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import socket
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import argparse
39
import optparse
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import datetime
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import errno
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import gnutls.crypto
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import functools
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import cPickle as pickle
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import multiprocessing
67
import types
68
import binascii
69
import tempfile
70
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:
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SO_BINDTODEVICE = None
90
83
91
version = "1.6.8"
92
stored_state_file = "clients.pickle"
93
94
logger = logging.getLogger()
95
syslogger = None
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97
try:
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.if_nametoindex)
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(b"16s16x", interface))
108
interface_index = struct.unpack("I", ifreq[16:20])[0]
109
return interface_index
110
111
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def initlogger(debug, level=logging.WARNING):
113
"""init logger and add loglevel"""
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global syslogger
116
syslogger = (logging.handlers.SysLogHandler
117
(facility =
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logging.handlers.SysLogHandler.LOG_DAEMON,
119
address = "/dev/log"))
120
syslogger.setFormatter(logging.Formatter
121
('Mandos [%(process)d]: %(levelname)s:'
122
' %(message)s'))
123
logger.addHandler(syslogger)
124
125
if debug:
126
console = logging.StreamHandler()
127
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
128
' [%(process)d]:'
129
' %(levelname)s:'
130
' %(message)s'))
131
logger.addHandler(console)
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logger.setLevel(level)
133
134
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class PGPError(Exception):
136
"""Exception if encryption/decryption fails"""
137
pass
138
139
140
class PGPEngine(object):
141
"""A simple class for OpenPGP symmetric encryption & decryption"""
142
def __init__(self):
143
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
144
self.gnupgargs = ['--batch',
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'--home', self.tempdir,
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'--force-mdc',
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'--quiet',
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'--no-use-agent']
149
150
def __enter__(self):
151
return self
152
153
def __exit__(self, exc_type, exc_value, traceback):
154
self._cleanup()
155
return False
156
157
def __del__(self):
158
self._cleanup()
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160
def _cleanup(self):
161
if self.tempdir is not None:
162
# Delete contents of tempdir
163
for root, dirs, files in os.walk(self.tempdir,
164
topdown = False):
165
for filename in files:
166
os.remove(os.path.join(root, filename))
167
for dirname in dirs:
168
os.rmdir(os.path.join(root, dirname))
169
# Remove tempdir
170
os.rmdir(self.tempdir)
171
self.tempdir = None
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173
def password_encode(self, password):
174
# Passphrase can not be empty and can not contain newlines or
175
# NUL bytes. So we prefix it and hex encode it.
176
encoded = b"mandos" + binascii.hexlify(password)
177
if len(encoded) > 2048:
178
# GnuPG can't handle long passwords, so encode differently
179
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
180
.replace(b"\n", b"\\n")
181
.replace(b"\0", b"\\x00"))
182
return encoded
183
184
def encrypt(self, data, password):
185
passphrase = self.password_encode(password)
186
with tempfile.NamedTemporaryFile(dir=self.tempdir
187
) as passfile:
188
passfile.write(passphrase)
189
passfile.flush()
190
proc = subprocess.Popen(['gpg', '--symmetric',
191
'--passphrase-file',
192
passfile.name]
193
+ self.gnupgargs,
194
stdin = subprocess.PIPE,
195
stdout = subprocess.PIPE,
196
stderr = subprocess.PIPE)
197
ciphertext, err = proc.communicate(input = data)
198
if proc.returncode != 0:
199
raise PGPError(err)
200
return ciphertext
201
202
def decrypt(self, data, password):
203
passphrase = self.password_encode(password)
204
with tempfile.NamedTemporaryFile(dir = self.tempdir
205
) as passfile:
206
passfile.write(passphrase)
207
passfile.flush()
208
proc = subprocess.Popen(['gpg', '--decrypt',
209
'--passphrase-file',
210
passfile.name]
211
+ self.gnupgargs,
212
stdin = subprocess.PIPE,
213
stdout = subprocess.PIPE,
214
stderr = subprocess.PIPE)
215
decrypted_plaintext, err = proc.communicate(input
216
= data)
217
if proc.returncode != 0:
218
raise PGPError(err)
219
return decrypted_plaintext
220
84
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version = "1.2.3"
86
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#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
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console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
221
102
222
103
class AvahiError(Exception):
223
104
def __init__(self, value, *args, **kwargs):
224
105
self.value = value
225
return super(AvahiError, self).__init__(value, *args,
226
**kwargs)
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
227
109
228
110
class AvahiServiceError(AvahiError):
229
111
pass
240
122
Used to optionally bind to the specified interface.
241
123
name: string; Example: 'Mandos'
242
124
type: string; Example: '_mandos._tcp'.
243
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
244
126
port: integer; what port to announce
245
127
TXT: list of strings; TXT record for the service
246
128
domain: string; Domain to publish on, default to .local if empty.
252
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server: D-Bus Server
253
135
bus: dbus.SystemBus()
254
136
"""
255
256
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
257
138
servicetype = None, port = None, TXT = None,
258
139
domain = "", host = "", max_renames = 32768,
270
151
self.group = None # our entry group
271
152
self.server = None
272
153
self.bus = bus
273
self.entry_group_state_changed_match = None
274
275
154
def rename(self):
276
155
"""Derived from the Avahi example code"""
277
156
if self.rename_count >= self.max_renames:
279
158
" after %i retries, exiting.",
280
159
self.rename_count)
281
160
raise AvahiServiceError("Too many renames")
282
self.name = unicode(self.server
283
.GetAlternativeServiceName(self.name))
161
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
284
162
logger.info("Changing Zeroconf service name to %r ...",
285
163
self.name)
164
syslogger.setFormatter(logging.Formatter
165
('Mandos (%s) [%%(process)d]:'
166
' %%(levelname)s: %%(message)s'
167
% self.name))
286
168
self.remove()
287
169
try:
288
170
self.add()
289
except dbus.exceptions.DBusException as error:
290
logger.critical("D-Bus Exception", exc_info=error)
171
except dbus.exceptions.DBusException, error:
172
logger.critical("DBusException: %s", error)
291
173
self.cleanup()
292
174
os._exit(1)
293
175
self.rename_count += 1
294
295
176
def remove(self):
296
177
"""Derived from the Avahi example code"""
297
if self.entry_group_state_changed_match is not None:
298
self.entry_group_state_changed_match.remove()
299
self.entry_group_state_changed_match = None
300
178
if self.group is not None:
301
179
self.group.Reset()
302
303
180
def add(self):
304
181
"""Derived from the Avahi example code"""
305
self.remove()
306
182
if self.group is None:
307
183
self.group = dbus.Interface(
308
184
self.bus.get_object(avahi.DBUS_NAME,
309
185
self.server.EntryGroupNew()),
310
186
avahi.DBUS_INTERFACE_ENTRY_GROUP)
311
self.entry_group_state_changed_match = (
312
self.group.connect_to_signal(
313
'StateChanged', self.entry_group_state_changed))
187
self.group.connect_to_signal('StateChanged',
188
self
189
.entry_group_state_changed)
314
190
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
315
191
self.name, self.type)
316
192
self.group.AddService(
322
198
dbus.UInt16(self.port),
323
199
avahi.string_array_to_txt_array(self.TXT))
324
200
self.group.Commit()
325
326
201
def entry_group_state_changed(self, state, error):
327
202
"""Derived from the Avahi example code"""
328
203
logger.debug("Avahi entry group state change: %i", state)
335
210
elif state == avahi.ENTRY_GROUP_FAILURE:
336
211
logger.critical("Avahi: Error in group state changed %s",
337
212
unicode(error))
338
raise AvahiGroupError("State changed: {!s}"
339
.format(error))
340
213
raise AvahiGroupError("State changed: %s"
214
% unicode(error))
341
215
def cleanup(self):
342
216
"""Derived from the Avahi example code"""
343
217
if self.group is not None:
344
try:
345
self.group.Free()
346
except (dbus.exceptions.UnknownMethodException,
347
dbus.exceptions.DBusException):
348
pass
218
self.group.Free()
349
219
self.group = None
350
self.remove()
351
352
def server_state_changed(self, state, error=None):
220
def server_state_changed(self, state):
353
221
"""Derived from the Avahi example code"""
354
222
logger.debug("Avahi server state change: %i", state)
355
bad_states = { avahi.SERVER_INVALID:
356
"Zeroconf server invalid",
357
avahi.SERVER_REGISTERING: None,
358
avahi.SERVER_COLLISION:
359
"Zeroconf server name collision",
360
avahi.SERVER_FAILURE:
361
"Zeroconf server failure" }
362
if state in bad_states:
363
if bad_states[state] is not None:
364
if error is None:
365
logger.error(bad_states[state])
366
else:
367
logger.error(bad_states[state] + ": %r", error)
368
self.cleanup()
223
if state == avahi.SERVER_COLLISION:
224
logger.error("Zeroconf server name collision")
225
self.remove()
369
226
elif state == avahi.SERVER_RUNNING:
370
227
self.add()
371
else:
372
if error is None:
373
logger.debug("Unknown state: %r", state)
374
else:
375
logger.debug("Unknown state: %r: %r", state, error)
376
377
228
def activate(self):
378
229
"""Derived from the Avahi example code"""
379
230
if self.server is None:
380
231
self.server = dbus.Interface(
381
232
self.bus.get_object(avahi.DBUS_NAME,
382
avahi.DBUS_PATH_SERVER,
383
follow_name_owner_changes=True),
233
avahi.DBUS_PATH_SERVER),
384
234
avahi.DBUS_INTERFACE_SERVER)
385
235
self.server.connect_to_signal("StateChanged",
386
236
self.server_state_changed)
387
237
self.server_state_changed(self.server.GetState())
388
238
389
239
390
class AvahiServiceToSyslog(AvahiService):
391
def rename(self):
392
"""Add the new name to the syslog messages"""
393
ret = AvahiService.rename(self)
394
syslogger.setFormatter(logging.Formatter
395
('Mandos ({}) [%(process)d]:'
396
' %(levelname)s: %(message)s'
397
.format(self.name)))
398
return ret
399
400
401
240
class Client(object):
402
241
"""A representation of a client host served by this server.
403
242
404
243
Attributes:
405
approved: bool(); 'None' if not yet approved/disapproved
244
_approved: bool(); 'None' if not yet approved/disapproved
406
245
approval_delay: datetime.timedelta(); Time to wait for approval
407
246
approval_duration: datetime.timedelta(); Duration of one approval
408
247
checker: subprocess.Popen(); a running checker process used
415
254
instance %(name)s can be used in the command.
416
255
checker_initiator_tag: a gobject event source tag, or None
417
256
created: datetime.datetime(); (UTC) object creation
418
client_structure: Object describing what attributes a client has
419
and is used for storing the client at exit
420
257
current_checker_command: string; current running checker_command
258
disable_hook: If set, called by disable() as disable_hook(self)
421
259
disable_initiator_tag: a gobject event source tag, or None
422
260
enabled: bool()
423
261
fingerprint: string (40 or 32 hexadecimal digits); used to
426
264
interval: datetime.timedelta(); How often to start a new checker
427
265
last_approval_request: datetime.datetime(); (UTC) or None
428
266
last_checked_ok: datetime.datetime(); (UTC) or None
429
last_checker_status: integer between 0 and 255 reflecting exit
430
status of last checker. -1 reflects crashed
431
checker, -2 means no checker completed yet.
432
last_enabled: datetime.datetime(); (UTC) or None
267
last_enabled: datetime.datetime(); (UTC)
433
268
name: string; from the config file, used in log messages and
434
269
D-Bus identifiers
435
270
secret: bytestring; sent verbatim (over TLS) to client
436
271
timeout: datetime.timedelta(); How long from last_checked_ok
437
272
until this client is disabled
438
extended_timeout: extra long timeout when secret has been sent
439
273
runtime_expansions: Allowed attributes for runtime expansion.
440
expires: datetime.datetime(); time (UTC) when a client will be
441
disabled, or None
442
server_settings: The server_settings dict from main()
443
274
"""
444
275
445
276
runtime_expansions = ("approval_delay", "approval_duration",
446
"created", "enabled", "expires",
447
"fingerprint", "host", "interval",
448
"last_approval_request", "last_checked_ok",
277
"created", "enabled", "fingerprint",
278
"host", "interval", "last_checked_ok",
449
279
"last_enabled", "name", "timeout")
450
client_defaults = { "timeout": "PT5M",
451
"extended_timeout": "PT15M",
452
"interval": "PT2M",
453
"checker": "fping -q -- %%(host)s",
454
"host": "",
455
"approval_delay": "PT0S",
456
"approval_duration": "PT1S",
457
"approved_by_default": "True",
458
"enabled": "True",
459
}
460
280
461
281
@staticmethod
462
def config_parser(config):
463
"""Construct a new dict of client settings of this form:
464
{ client_name: {setting_name: value, ...}, ...}
465
with exceptions for any special settings as defined above.
466
NOTE: Must be a pure function. Must return the same result
467
value given the same arguments.
468
"""
469
settings = {}
470
for client_name in config.sections():
471
section = dict(config.items(client_name))
472
client = settings[client_name] = {}
473
474
client["host"] = section["host"]
475
# Reformat values from string types to Python types
476
client["approved_by_default"] = config.getboolean(
477
client_name, "approved_by_default")
478
client["enabled"] = config.getboolean(client_name,
479
"enabled")
480
481
client["fingerprint"] = (section["fingerprint"].upper()
482
.replace(" ", ""))
483
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
485
elif "secfile" in section:
486
with open(os.path.expanduser(os.path.expandvars
487
(section["secfile"])),
488
"rb") as secfile:
489
client["secret"] = secfile.read()
490
else:
491
raise TypeError("No secret or secfile for section {}"
492
.format(section))
493
client["timeout"] = string_to_delta(section["timeout"])
494
client["extended_timeout"] = string_to_delta(
495
section["extended_timeout"])
496
client["interval"] = string_to_delta(section["interval"])
497
client["approval_delay"] = string_to_delta(
498
section["approval_delay"])
499
client["approval_duration"] = string_to_delta(
500
section["approval_duration"])
501
client["checker_command"] = section["checker"]
502
client["last_approval_request"] = None
503
client["last_checked_ok"] = None
504
client["last_checker_status"] = -2
505
506
return settings
507
508
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."""
509
303
self.name = name
510
if server_settings is None:
511
server_settings = {}
512
self.server_settings = server_settings
513
# adding all client settings
514
for setting, value in settings.items():
515
setattr(self, setting, value)
516
517
if self.enabled:
518
if not hasattr(self, "last_enabled"):
519
self.last_enabled = datetime.datetime.utcnow()
520
if not hasattr(self, "expires"):
521
self.expires = (datetime.datetime.utcnow()
522
+ self.timeout)
523
else:
524
self.last_enabled = None
525
self.expires = None
526
304
if config is None:
305
config = {}
527
306
logger.debug("Creating client %r", self.name)
528
307
# Uppercase and remove spaces from fingerprint for later
529
308
# comparison purposes with return value from the fingerprint()
530
309
# function
310
self.fingerprint = (config["fingerprint"].upper()
311
.replace(" ", ""))
531
312
logger.debug(" Fingerprint: %s", self.fingerprint)
532
self.created = settings.get("created",
533
datetime.datetime.utcnow())
534
535
# 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
536
332
self.checker = None
537
333
self.checker_initiator_tag = None
538
334
self.disable_initiator_tag = None
539
335
self.checker_callback_tag = None
336
self.checker_command = config["checker"]
540
337
self.current_checker_command = None
541
self.approved = None
338
self.last_connect = None
339
self._approved = None
340
self.approved_by_default = config.get("approved_by_default",
341
True)
542
342
self.approvals_pending = 0
543
self.changedstate = (multiprocessing_manager
544
.Condition(multiprocessing_manager
545
.Lock()))
546
self.client_structure = [attr for attr in
547
self.__dict__.iterkeys()
548
if not attr.startswith("_")]
549
self.client_structure.append("client_structure")
550
551
for name, t in inspect.getmembers(type(self),
552
lambda obj:
553
isinstance(obj,
554
property)):
555
if not name.startswith("_"):
556
self.client_structure.append(name)
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())
557
348
558
# Send notice to process children that client state has changed
559
349
def send_changedstate(self):
560
with self.changedstate:
561
self.changedstate.notify_all()
562
350
self.changedstate.acquire()
351
self.changedstate.notify_all()
352
self.changedstate.release()
353
563
354
def enable(self):
564
355
"""Start this client's checker and timeout hooks"""
565
356
if getattr(self, "enabled", False):
566
357
# Already enabled
567
358
return
568
self.expires = datetime.datetime.utcnow() + self.timeout
569
self.enabled = True
359
self.send_changedstate()
570
360
self.last_enabled = datetime.datetime.utcnow()
571
self.init_checker()
572
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()
573
373
574
374
def disable(self, quiet=True):
575
375
"""Disable this client."""
576
376
if not getattr(self, "enabled", False):
577
377
return False
578
378
if not quiet:
379
self.send_changedstate()
380
if not quiet:
579
381
logger.info("Disabling client %s", self.name)
580
if getattr(self, "disable_initiator_tag", None) is not None:
382
if getattr(self, "disable_initiator_tag", False):
581
383
gobject.source_remove(self.disable_initiator_tag)
582
384
self.disable_initiator_tag = None
583
self.expires = None
584
if getattr(self, "checker_initiator_tag", None) is not None:
385
if getattr(self, "checker_initiator_tag", False):
585
386
gobject.source_remove(self.checker_initiator_tag)
586
387
self.checker_initiator_tag = None
587
388
self.stop_checker()
389
if self.disable_hook:
390
self.disable_hook(self)
588
391
self.enabled = False
589
if not quiet:
590
self.send_changedstate()
591
392
# Do not run this again if called by a gobject.timeout_add
592
393
return False
593
394
594
395
def __del__(self):
396
self.disable_hook = None
595
397
self.disable()
596
398
597
def init_checker(self):
598
# Schedule a new checker to be started an 'interval' from now,
599
# and every interval from then on.
600
if self.checker_initiator_tag is not None:
601
gobject.source_remove(self.checker_initiator_tag)
602
self.checker_initiator_tag = (gobject.timeout_add
603
(int(self.interval
604
.total_seconds() * 1000),
605
self.start_checker))
606
# Schedule a disable() when 'timeout' has passed
607
if self.disable_initiator_tag is not None:
608
gobject.source_remove(self.disable_initiator_tag)
609
self.disable_initiator_tag = (gobject.timeout_add
610
(int(self.timeout
611
.total_seconds() * 1000),
612
self.disable))
613
# Also start a new checker *right now*.
614
self.start_checker()
615
616
399
def checker_callback(self, pid, condition, command):
617
400
"""The checker has completed, so take appropriate actions."""
618
401
self.checker_callback_tag = None
619
402
self.checker = None
620
403
if os.WIFEXITED(condition):
621
self.last_checker_status = os.WEXITSTATUS(condition)
622
if self.last_checker_status == 0:
404
exitstatus = os.WEXITSTATUS(condition)
405
if exitstatus == 0:
623
406
logger.info("Checker for %(name)s succeeded",
624
407
vars(self))
625
408
self.checked_ok()
627
410
logger.info("Checker for %(name)s failed",
628
411
vars(self))
629
412
else:
630
self.last_checker_status = -1
631
413
logger.warning("Checker for %(name)s crashed?",
632
414
vars(self))
633
415
634
416
def checked_ok(self):
635
"""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
"""
636
422
self.last_checked_ok = datetime.datetime.utcnow()
637
self.last_checker_status = 0
638
self.bump_timeout()
639
640
def bump_timeout(self, timeout=None):
641
"""Bump up the timeout for this client."""
642
if timeout is None:
643
timeout = self.timeout
644
if self.disable_initiator_tag is not None:
645
gobject.source_remove(self.disable_initiator_tag)
646
self.disable_initiator_tag = None
647
if getattr(self, "enabled", False):
648
self.disable_initiator_tag = (gobject.timeout_add
649
(int(timeout.total_seconds()
650
* 1000), self.disable))
651
self.expires = datetime.datetime.utcnow() + timeout
423
gobject.source_remove(self.disable_initiator_tag)
424
self.disable_initiator_tag = (gobject.timeout_add
425
(self.timeout_milliseconds(),
426
self.disable))
652
427
653
428
def need_approval(self):
654
429
self.last_approval_request = datetime.datetime.utcnow()
659
434
If a checker already exists, leave it running and do
660
435
nothing."""
661
436
# The reason for not killing a running checker is that if we
662
# did that, and if a checker (for some reason) started running
663
# slowly and taking more than 'interval' time, then the client
664
# would inevitably timeout, since no checker would get a
665
# chance to run to completion. If we instead leave running
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
666
441
# checkers alone, the checker would have to take more time
667
442
# than 'timeout' for the client to be disabled, which is as it
668
443
# should be.
670
445
# If a checker exists, make sure it is not a zombie
671
446
try:
672
447
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
673
except AttributeError:
674
pass
675
except OSError as error:
676
if error.errno != errno.ECHILD:
677
raise
448
except (AttributeError, OSError), error:
449
if (isinstance(error, OSError)
450
and error.errno != errno.ECHILD):
451
raise error
678
452
else:
679
453
if pid:
680
454
logger.warning("Checker was a zombie")
683
457
self.current_checker_command)
684
458
# Start a new checker if needed
685
459
if self.checker is None:
686
# Escape attributes for the shell
687
escaped_attrs = { attr:
688
re.escape(unicode(getattr(self,
689
attr)))
690
for attr in self.runtime_expansions }
691
460
try:
692
command = self.checker_command % escaped_attrs
693
except TypeError as error:
694
logger.error('Could not format string "%s"',
695
self.checker_command, exc_info=error)
696
return True # Try again later
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
697
479
self.current_checker_command = command
698
480
try:
699
481
logger.info("Starting checker %r for %s",
702
484
# in normal mode, that is already done by daemon(),
703
485
# and in debug mode we don't want to. (Stdin is
704
486
# always replaced by /dev/null.)
705
# The exception is when not debugging but nevertheless
706
# running in the foreground; use the previously
707
# created wnull.
708
popen_args = {}
709
if (not self.server_settings["debug"]
710
and self.server_settings["foreground"]):
711
popen_args.update({"stdout": wnull,
712
"stderr": wnull })
713
487
self.checker = subprocess.Popen(command,
714
488
close_fds=True,
715
shell=True, cwd="/",
716
**popen_args)
717
except OSError as error:
718
logger.error("Failed to start subprocess",
719
exc_info=error)
720
return True
721
self.checker_callback_tag = (gobject.child_watch_add
722
(self.checker.pid,
723
self.checker_callback,
724
data=command))
725
# The checker may have completed before the gobject
726
# watch was added. Check for this.
727
try:
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.
728
496
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
729
except OSError as error:
730
if error.errno == errno.ECHILD:
731
# This should never happen
732
logger.error("Child process vanished",
733
exc_info=error)
734
return True
735
raise
736
if pid:
737
gobject.source_remove(self.checker_callback_tag)
738
self.checker_callback(pid, status, command)
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)
739
503
# Re-run this periodically if run by gobject.timeout_add
740
504
return True
741
505
748
512
return
749
513
logger.debug("Stopping checker for %(name)s", vars(self))
750
514
try:
751
self.checker.terminate()
515
os.kill(self.checker.pid, signal.SIGTERM)
752
516
#time.sleep(0.5)
753
517
#if self.checker.poll() is None:
754
# self.checker.kill()
755
except OSError as error:
518
# os.kill(self.checker.pid, signal.SIGKILL)
519
except OSError, error:
756
520
if error.errno != errno.ESRCH: # No such process
757
521
raise
758
522
self.checker = None
759
523
760
761
524
def dbus_service_property(dbus_interface, signature="v",
762
525
access="readwrite", byte_arrays=False):
763
526
"""Decorators for marking methods of a DBusObjectWithProperties to
774
537
# "Set" method, so we fail early here:
775
538
if byte_arrays and signature != "ay":
776
539
raise ValueError("Byte arrays not supported for non-'ay'"
777
" signature {!r}".format(signature))
540
" signature %r" % signature)
778
541
def decorator(func):
779
542
func._dbus_is_property = True
780
543
func._dbus_interface = dbus_interface
788
551
return decorator
789
552
790
553
791
def dbus_interface_annotations(dbus_interface):
792
"""Decorator for marking functions returning interface annotations
793
794
Usage:
795
796
@dbus_interface_annotations("org.example.Interface")
797
def _foo(self): # Function name does not matter
798
return {"org.freedesktop.DBus.Deprecated": "true",
799
"org.freedesktop.DBus.Property.EmitsChangedSignal":
800
"false"}
801
"""
802
def decorator(func):
803
func._dbus_is_interface = True
804
func._dbus_interface = dbus_interface
805
func._dbus_name = dbus_interface
806
return func
807
return decorator
808
809
810
def dbus_annotations(annotations):
811
"""Decorator to annotate D-Bus methods, signals or properties
812
Usage:
813
814
@dbus_service_property("org.example.Interface", signature="b",
815
access="r")
816
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
817
"org.freedesktop.DBus.Property."
818
"EmitsChangedSignal": "false"})
819
def Property_dbus_property(self):
820
return dbus.Boolean(False)
821
"""
822
def decorator(func):
823
func._dbus_annotations = annotations
824
return func
825
return decorator
826
827
828
554
class DBusPropertyException(dbus.exceptions.DBusException):
829
555
"""A base class for D-Bus property-related exceptions
830
556
"""
831
pass
557
def __unicode__(self):
558
return unicode(str(self))
559
832
560
833
561
class DBusPropertyAccessException(DBusPropertyException):
834
562
"""A property's access permissions disallows an operation.
844
572
845
573
class DBusObjectWithProperties(dbus.service.Object):
846
574
"""A D-Bus object with properties.
847
575
848
576
Classes inheriting from this can use the dbus_service_property
849
577
decorator to expose methods as D-Bus properties. It exposes the
850
578
standard Get(), Set(), and GetAll() methods on the D-Bus.
851
579
"""
852
580
853
581
@staticmethod
854
def _is_dbus_thing(thing):
855
"""Returns a function testing if an attribute is a D-Bus thing
856
857
If called like _is_dbus_thing("method") it returns a function
858
suitable for use as predicate to inspect.getmembers().
859
"""
860
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
861
False)
582
def _is_dbus_property(obj):
583
return getattr(obj, "_dbus_is_property", False)
862
584
863
def _get_all_dbus_things(self, thing):
585
def _get_all_dbus_properties(self):
864
586
"""Returns a generator of (name, attribute) pairs
865
587
"""
866
return ((getattr(athing.__get__(self), "_dbus_name",
867
name),
868
athing.__get__(self))
869
for cls in self.__class__.__mro__
870
for name, athing in
871
inspect.getmembers(cls,
872
self._is_dbus_thing(thing)))
588
return ((prop._dbus_name, prop)
589
for name, prop in
590
inspect.getmembers(self, self._is_dbus_property))
873
591
874
592
def _get_dbus_property(self, interface_name, property_name):
875
593
"""Returns a bound method if one exists which is a D-Bus
876
594
property with the specified name and interface.
877
595
"""
878
for cls in self.__class__.__mro__:
879
for name, value in (inspect.getmembers
880
(cls,
881
self._is_dbus_thing("property"))):
882
if (value._dbus_name == property_name
883
and value._dbus_interface == interface_name):
884
return value.__get__(self)
885
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
886
606
# No such property
887
607
raise DBusPropertyNotFound(self.dbus_object_path + ":"
888
608
+ interface_name + "."
912
632
# The byte_arrays option is not supported yet on
913
633
# signatures other than "ay".
914
634
if prop._dbus_signature != "ay":
915
raise ValueError("Byte arrays not supported for non-"
916
"'ay' signature {!r}"
917
.format(prop._dbus_signature))
918
value = dbus.ByteArray(b''.join(chr(byte)
919
for byte in value))
635
raise ValueError
636
value = dbus.ByteArray(''.join(unichr(byte)
637
for byte in value))
920
638
prop(value)
921
639
922
640
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
924
642
def GetAll(self, interface_name):
925
643
"""Standard D-Bus property GetAll() method, see D-Bus
926
644
standard.
927
645
928
646
Note: Will not include properties with access="write".
929
647
"""
930
properties = {}
931
for name, prop in self._get_all_dbus_things("property"):
648
all = {}
649
for name, prop in self._get_all_dbus_properties():
932
650
if (interface_name
933
651
and interface_name != prop._dbus_interface):
934
652
# Interface non-empty but did not match
938
656
continue
939
657
value = prop()
940
658
if not hasattr(value, "variant_level"):
941
properties[name] = value
659
all[name] = value
942
660
continue
943
properties[name] = type(value)(value, variant_level=
944
value.variant_level+1)
945
return dbus.Dictionary(properties, signature="sv")
661
all[name] = type(value)(value, variant_level=
662
value.variant_level+1)
663
return dbus.Dictionary(all, signature="sv")
946
664
947
665
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
948
666
out_signature="s",
949
667
path_keyword='object_path',
950
668
connection_keyword='connection')
951
669
def Introspect(self, object_path, connection):
952
"""Overloading of standard D-Bus method.
953
954
Inserts property tags and interface annotation tags.
670
"""Standard D-Bus method, overloaded to insert property tags.
955
671
"""
956
672
xmlstring = dbus.service.Object.Introspect(self, object_path,
957
673
connection)
964
680
e.setAttribute("access", prop._dbus_access)
965
681
return e
966
682
for if_tag in document.getElementsByTagName("interface"):
967
# Add property tags
968
683
for tag in (make_tag(document, name, prop)
969
684
for name, prop
970
in self._get_all_dbus_things("property")
685
in self._get_all_dbus_properties()
971
686
if prop._dbus_interface
972
687
== if_tag.getAttribute("name")):
973
688
if_tag.appendChild(tag)
974
# Add annotation tags
975
for typ in ("method", "signal", "property"):
976
for tag in if_tag.getElementsByTagName(typ):
977
annots = dict()
978
for name, prop in (self.
979
_get_all_dbus_things(typ)):
980
if (name == tag.getAttribute("name")
981
and prop._dbus_interface
982
== if_tag.getAttribute("name")):
983
annots.update(getattr
984
(prop,
985
"_dbus_annotations",
986
{}))
987
for name, value in annots.items():
988
ann_tag = document.createElement(
989
"annotation")
990
ann_tag.setAttribute("name", name)
991
ann_tag.setAttribute("value", value)
992
tag.appendChild(ann_tag)
993
# Add interface annotation tags
994
for annotation, value in dict(
995
itertools.chain.from_iterable(
996
annotations().items()
997
for name, annotations in
998
self._get_all_dbus_things("interface")
999
if name == if_tag.getAttribute("name")
1000
)).items():
1001
ann_tag = document.createElement("annotation")
1002
ann_tag.setAttribute("name", annotation)
1003
ann_tag.setAttribute("value", value)
1004
if_tag.appendChild(ann_tag)
1005
689
# Add the names to the return values for the
1006
690
# "org.freedesktop.DBus.Properties" methods
1007
691
if (if_tag.getAttribute("name")
1020
704
xmlstring = document.toxml("utf-8")
1021
705
document.unlink()
1022
706
except (AttributeError, xml.dom.DOMException,
1023
xml.parsers.expat.ExpatError) as error:
707
xml.parsers.expat.ExpatError), error:
1024
708
logger.error("Failed to override Introspection method",
1025
exc_info=error)
709
error)
1026
710
return xmlstring
1027
711
1028
712
1029
def datetime_to_dbus(dt, variant_level=0):
1030
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1031
if dt is None:
1032
return dbus.String("", variant_level = variant_level)
1033
return dbus.String(dt.isoformat(),
1034
variant_level=variant_level)
1035
1036
1037
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1038
"""A class decorator; applied to a subclass of
1039
dbus.service.Object, it will add alternate D-Bus attributes with
1040
interface names according to the "alt_interface_names" mapping.
1041
Usage:
1042
1043
@alternate_dbus_interfaces({"org.example.Interface":
1044
"net.example.AlternateInterface"})
1045
class SampleDBusObject(dbus.service.Object):
1046
@dbus.service.method("org.example.Interface")
1047
def SampleDBusMethod():
1048
pass
1049
1050
The above "SampleDBusMethod" on "SampleDBusObject" will be
1051
reachable via two interfaces: "org.example.Interface" and
1052
"net.example.AlternateInterface", the latter of which will have
1053
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1054
"true", unless "deprecate" is passed with a False value.
1055
1056
This works for methods and signals, and also for D-Bus properties
1057
(from DBusObjectWithProperties) and interfaces (from the
1058
dbus_interface_annotations decorator).
1059
"""
1060
def wrapper(cls):
1061
for orig_interface_name, alt_interface_name in (
1062
alt_interface_names.items()):
1063
attr = {}
1064
interface_names = set()
1065
# Go though all attributes of the class
1066
for attrname, attribute in inspect.getmembers(cls):
1067
# Ignore non-D-Bus attributes, and D-Bus attributes
1068
# with the wrong interface name
1069
if (not hasattr(attribute, "_dbus_interface")
1070
or not attribute._dbus_interface
1071
.startswith(orig_interface_name)):
1072
continue
1073
# Create an alternate D-Bus interface name based on
1074
# the current name
1075
alt_interface = (attribute._dbus_interface
1076
.replace(orig_interface_name,
1077
alt_interface_name))
1078
interface_names.add(alt_interface)
1079
# Is this a D-Bus signal?
1080
if getattr(attribute, "_dbus_is_signal", False):
1081
# Extract the original non-method undecorated
1082
# function by black magic
1083
nonmethod_func = (dict(
1084
zip(attribute.func_code.co_freevars,
1085
attribute.__closure__))["func"]
1086
.cell_contents)
1087
# Create a new, but exactly alike, function
1088
# object, and decorate it to be a new D-Bus signal
1089
# with the alternate D-Bus interface name
1090
new_function = (dbus.service.signal
1091
(alt_interface,
1092
attribute._dbus_signature)
1093
(types.FunctionType(
1094
nonmethod_func.func_code,
1095
nonmethod_func.func_globals,
1096
nonmethod_func.func_name,
1097
nonmethod_func.func_defaults,
1098
nonmethod_func.func_closure)))
1099
# Copy annotations, if any
1100
try:
1101
new_function._dbus_annotations = (
1102
dict(attribute._dbus_annotations))
1103
except AttributeError:
1104
pass
1105
# Define a creator of a function to call both the
1106
# original and alternate functions, so both the
1107
# original and alternate signals gets sent when
1108
# the function is called
1109
def fixscope(func1, func2):
1110
"""This function is a scope container to pass
1111
func1 and func2 to the "call_both" function
1112
outside of its arguments"""
1113
def call_both(*args, **kwargs):
1114
"""This function will emit two D-Bus
1115
signals by calling func1 and func2"""
1116
func1(*args, **kwargs)
1117
func2(*args, **kwargs)
1118
return call_both
1119
# Create the "call_both" function and add it to
1120
# the class
1121
attr[attrname] = fixscope(attribute, new_function)
1122
# Is this a D-Bus method?
1123
elif getattr(attribute, "_dbus_is_method", False):
1124
# Create a new, but exactly alike, function
1125
# object. Decorate it to be a new D-Bus method
1126
# with the alternate D-Bus interface name. Add it
1127
# to the class.
1128
attr[attrname] = (dbus.service.method
1129
(alt_interface,
1130
attribute._dbus_in_signature,
1131
attribute._dbus_out_signature)
1132
(types.FunctionType
1133
(attribute.func_code,
1134
attribute.func_globals,
1135
attribute.func_name,
1136
attribute.func_defaults,
1137
attribute.func_closure)))
1138
# Copy annotations, if any
1139
try:
1140
attr[attrname]._dbus_annotations = (
1141
dict(attribute._dbus_annotations))
1142
except AttributeError:
1143
pass
1144
# Is this a D-Bus property?
1145
elif getattr(attribute, "_dbus_is_property", False):
1146
# Create a new, but exactly alike, function
1147
# object, and decorate it to be a new D-Bus
1148
# property with the alternate D-Bus interface
1149
# name. Add it to the class.
1150
attr[attrname] = (dbus_service_property
1151
(alt_interface,
1152
attribute._dbus_signature,
1153
attribute._dbus_access,
1154
attribute
1155
._dbus_get_args_options
1156
["byte_arrays"])
1157
(types.FunctionType
1158
(attribute.func_code,
1159
attribute.func_globals,
1160
attribute.func_name,
1161
attribute.func_defaults,
1162
attribute.func_closure)))
1163
# Copy annotations, if any
1164
try:
1165
attr[attrname]._dbus_annotations = (
1166
dict(attribute._dbus_annotations))
1167
except AttributeError:
1168
pass
1169
# Is this a D-Bus interface?
1170
elif getattr(attribute, "_dbus_is_interface", False):
1171
# Create a new, but exactly alike, function
1172
# object. Decorate it to be a new D-Bus interface
1173
# with the alternate D-Bus interface name. Add it
1174
# to the class.
1175
attr[attrname] = (dbus_interface_annotations
1176
(alt_interface)
1177
(types.FunctionType
1178
(attribute.func_code,
1179
attribute.func_globals,
1180
attribute.func_name,
1181
attribute.func_defaults,
1182
attribute.func_closure)))
1183
if deprecate:
1184
# Deprecate all alternate interfaces
1185
iname="_AlternateDBusNames_interface_annotation{}"
1186
for interface_name in interface_names:
1187
@dbus_interface_annotations(interface_name)
1188
def func(self):
1189
return { "org.freedesktop.DBus.Deprecated":
1190
"true" }
1191
# Find an unused name
1192
for aname in (iname.format(i)
1193
for i in itertools.count()):
1194
if aname not in attr:
1195
attr[aname] = func
1196
break
1197
if interface_names:
1198
# Replace the class with a new subclass of it with
1199
# methods, signals, etc. as created above.
1200
cls = type(b"{}Alternate".format(cls.__name__),
1201
(cls,), attr)
1202
return cls
1203
return wrapper
1204
1205
1206
@alternate_dbus_interfaces({"se.recompile.Mandos":
1207
"se.bsnet.fukt.Mandos"})
1208
713
class ClientDBus(Client, DBusObjectWithProperties):
1209
714
"""A Client class using D-Bus
1210
715
1219
724
# dbus.service.Object doesn't use super(), so we can't either.
1220
725
1221
726
def __init__(self, bus = None, *args, **kwargs):
727
self._approvals_pending = 0
1222
728
self.bus = bus
1223
729
Client.__init__(self, *args, **kwargs)
1224
730
# Only now, when this client is initialized, can it show up on
1230
736
("/clients/" + client_object_name))
1231
737
DBusObjectWithProperties.__init__(self, self.bus,
1232
738
self.dbus_object_path)
1233
1234
def notifychangeproperty(transform_func,
1235
dbus_name, type_func=lambda x: x,
1236
variant_level=1):
1237
""" Modify a variable so that it's a property which announces
1238
its changes to DBus.
1239
1240
transform_fun: Function that takes a value and a variant_level
1241
and transforms it to a D-Bus type.
1242
dbus_name: D-Bus name of the variable
1243
type_func: Function that transform the value before sending it
1244
to the D-Bus. Default: no transform
1245
variant_level: D-Bus variant level. Default: 1
1246
"""
1247
attrname = "_{}".format(dbus_name)
1248
def setter(self, value):
1249
if hasattr(self, "dbus_object_path"):
1250
if (not hasattr(self, attrname) or
1251
type_func(getattr(self, attrname, None))
1252
!= type_func(value)):
1253
dbus_value = transform_func(type_func(value),
1254
variant_level
1255
=variant_level)
1256
self.PropertyChanged(dbus.String(dbus_name),
1257
dbus_value)
1258
setattr(self, attrname, value)
1259
1260
return property(lambda self: getattr(self, attrname), setter)
1261
1262
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1263
approvals_pending = notifychangeproperty(dbus.Boolean,
1264
"ApprovalPending",
1265
type_func = bool)
1266
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1267
last_enabled = notifychangeproperty(datetime_to_dbus,
1268
"LastEnabled")
1269
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1270
type_func = lambda checker:
1271
checker is not None)
1272
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1273
"LastCheckedOK")
1274
last_checker_status = notifychangeproperty(dbus.Int16,
1275
"LastCheckerStatus")
1276
last_approval_request = notifychangeproperty(
1277
datetime_to_dbus, "LastApprovalRequest")
1278
approved_by_default = notifychangeproperty(dbus.Boolean,
1279
"ApprovedByDefault")
1280
approval_delay = notifychangeproperty(dbus.UInt64,
1281
"ApprovalDelay",
1282
type_func =
1283
lambda td: td.total_seconds()
1284
* 1000)
1285
approval_duration = notifychangeproperty(
1286
dbus.UInt64, "ApprovalDuration",
1287
type_func = lambda td: td.total_seconds() * 1000)
1288
host = notifychangeproperty(dbus.String, "Host")
1289
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1290
type_func = lambda td:
1291
td.total_seconds() * 1000)
1292
extended_timeout = notifychangeproperty(
1293
dbus.UInt64, "ExtendedTimeout",
1294
type_func = lambda td: td.total_seconds() * 1000)
1295
interval = notifychangeproperty(dbus.UInt64,
1296
"Interval",
1297
type_func =
1298
lambda td: td.total_seconds()
1299
* 1000)
1300
checker_command = notifychangeproperty(dbus.String, "Checker")
1301
1302
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
1303
783
1304
784
def __del__(self, *args, **kwargs):
1305
785
try:
1314
794
*args, **kwargs):
1315
795
self.checker_callback_tag = None
1316
796
self.checker = None
797
# Emit D-Bus signal
798
self.PropertyChanged(dbus.String("CheckerRunning"),
799
dbus.Boolean(False, variant_level=1))
1317
800
if os.WIFEXITED(condition):
1318
801
exitstatus = os.WEXITSTATUS(condition)
1319
802
# Emit D-Bus signal
1329
812
return Client.checker_callback(self, pid, condition, command,
1330
813
*args, **kwargs)
1331
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
1332
833
def start_checker(self, *args, **kwargs):
1333
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
1334
839
r = Client.start_checker(self, *args, **kwargs)
1335
840
# Only if new checker process was started
1336
841
if (self.checker is not None
1337
842
and old_checker_pid != self.checker.pid):
1338
843
# Emit D-Bus signal
1339
844
self.CheckerStarted(self.current_checker_command)
845
self.PropertyChanged(
846
dbus.String("CheckerRunning"),
847
dbus.Boolean(True, variant_level=1))
1340
848
return r
1341
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
1342
859
def _reset_approved(self):
1343
self.approved = None
860
self._approved = None
1344
861
return False
1345
862
1346
863
def approve(self, value=True):
1347
self.approved = value
1348
gobject.timeout_add(int(self.approval_duration.total_seconds()
1349
* 1000), self._reset_approved)
1350
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
1351
870
1352
871
## D-Bus methods, signals & properties
1353
_interface = "se.recompile.Mandos.Client"
1354
1355
## Interfaces
1356
1357
@dbus_interface_annotations(_interface)
1358
def _foo(self):
1359
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1360
"false"}
872
_interface = "se.bsnet.fukt.Mandos.Client"
1361
873
1362
874
## Signals
1363
875
1410
922
# CheckedOK - method
1411
923
@dbus.service.method(_interface)
1412
924
def CheckedOK(self):
1413
self.checked_ok()
925
return self.checked_ok()
1414
926
1415
927
# Enable - method
1416
928
@dbus.service.method(_interface)
1449
961
if value is None: # get
1450
962
return dbus.Boolean(self.approved_by_default)
1451
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))
1452
967
1453
968
# ApprovalDelay - property
1454
969
@dbus_service_property(_interface, signature="t",
1455
970
access="readwrite")
1456
971
def ApprovalDelay_dbus_property(self, value=None):
1457
972
if value is None: # get
1458
return dbus.UInt64(self.approval_delay.total_seconds()
1459
* 1000)
973
return dbus.UInt64(self.approval_delay_milliseconds())
1460
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))
1461
978
1462
979
# ApprovalDuration - property
1463
980
@dbus_service_property(_interface, signature="t",
1464
981
access="readwrite")
1465
982
def ApprovalDuration_dbus_property(self, value=None):
1466
983
if value is None: # get
1467
return dbus.UInt64(self.approval_duration.total_seconds()
1468
* 1000)
984
return dbus.UInt64(self._timedelta_to_milliseconds(
985
self.approval_duration))
1469
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))
1470
990
1471
991
# Name - property
1472
992
@dbus_service_property(_interface, signature="s", access="read")
1484
1004
def Host_dbus_property(self, value=None):
1485
1005
if value is None: # get
1486
1006
return dbus.String(self.host)
1487
self.host = unicode(value)
1007
self.host = value
1008
# Emit D-Bus signal
1009
self.PropertyChanged(dbus.String("Host"),
1010
dbus.String(value, variant_level=1))
1488
1011
1489
1012
# Created - property
1490
1013
@dbus_service_property(_interface, signature="s", access="read")
1491
1014
def Created_dbus_property(self):
1492
return datetime_to_dbus(self.created)
1015
return dbus.String(self._datetime_to_dbus(self.created))
1493
1016
1494
1017
# LastEnabled - property
1495
1018
@dbus_service_property(_interface, signature="s", access="read")
1496
1019
def LastEnabled_dbus_property(self):
1497
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))
1498
1023
1499
1024
# Enabled - property
1500
1025
@dbus_service_property(_interface, signature="b",
1514
1039
if value is not None:
1515
1040
self.checked_ok()
1516
1041
return
1517
return datetime_to_dbus(self.last_checked_ok)
1518
1519
# LastCheckerStatus - property
1520
@dbus_service_property(_interface, signature="n",
1521
access="read")
1522
def LastCheckerStatus_dbus_property(self):
1523
return dbus.Int16(self.last_checker_status)
1524
1525
# Expires - property
1526
@dbus_service_property(_interface, signature="s", access="read")
1527
def Expires_dbus_property(self):
1528
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))
1529
1046
1530
1047
# LastApprovalRequest - property
1531
1048
@dbus_service_property(_interface, signature="s", access="read")
1532
1049
def LastApprovalRequest_dbus_property(self):
1533
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))
1534
1055
1535
1056
# Timeout - property
1536
1057
@dbus_service_property(_interface, signature="t",
1537
1058
access="readwrite")
1538
1059
def Timeout_dbus_property(self, value=None):
1539
1060
if value is None: # get
1540
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1541
old_timeout = self.timeout
1061
return dbus.UInt64(self.timeout_milliseconds())
1542
1062
self.timeout = datetime.timedelta(0, 0, 0, value)
1543
# Reschedule disabling
1544
if self.enabled:
1545
now = datetime.datetime.utcnow()
1546
self.expires += self.timeout - old_timeout
1547
if self.expires <= now:
1548
# The timeout has passed
1549
self.disable()
1550
else:
1551
if (getattr(self, "disable_initiator_tag", None)
1552
is None):
1553
return
1554
gobject.source_remove(self.disable_initiator_tag)
1555
self.disable_initiator_tag = (
1556
gobject.timeout_add(
1557
int((self.expires - now).total_seconds()
1558
* 1000), self.disable))
1559
1560
# ExtendedTimeout - property
1561
@dbus_service_property(_interface, signature="t",
1562
access="readwrite")
1563
def ExtendedTimeout_dbus_property(self, value=None):
1564
if value is None: # get
1565
return dbus.UInt64(self.extended_timeout.total_seconds()
1566
* 1000)
1567
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))
1568
1083
1569
1084
# Interval - property
1570
1085
@dbus_service_property(_interface, signature="t",
1571
1086
access="readwrite")
1572
1087
def Interval_dbus_property(self, value=None):
1573
1088
if value is None: # get
1574
return dbus.UInt64(self.interval.total_seconds() * 1000)
1089
return dbus.UInt64(self.interval_milliseconds())
1575
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))
1576
1094
if getattr(self, "checker_initiator_tag", None) is None:
1577
1095
return
1578
if self.enabled:
1579
# Reschedule checker run
1580
gobject.source_remove(self.checker_initiator_tag)
1581
self.checker_initiator_tag = (gobject.timeout_add
1582
(value, self.start_checker))
1583
self.start_checker() # Start one now, too
1584
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
1585
1102
# Checker - property
1586
1103
@dbus_service_property(_interface, signature="s",
1587
1104
access="readwrite")
1588
1105
def Checker_dbus_property(self, value=None):
1589
1106
if value is None: # get
1590
1107
return dbus.String(self.checker_command)
1591
self.checker_command = unicode(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))
1592
1113
1593
1114
# CheckerRunning - property
1594
1115
@dbus_service_property(_interface, signature="b",
1610
1131
@dbus_service_property(_interface, signature="ay",
1611
1132
access="write", byte_arrays=True)
1612
1133
def Secret_dbus_property(self, value):
1613
self.secret = bytes(value)
1134
self.secret = str(value)
1614
1135
1615
1136
del _interface
1616
1137
1621
1142
self._pipe.send(('init', fpr, address))
1622
1143
if not self._pipe.recv():
1623
1144
raise KeyError()
1624
1145
1625
1146
def __getattribute__(self, name):
1626
if name == '_pipe':
1147
if(name == '_pipe'):
1627
1148
return super(ProxyClient, self).__getattribute__(name)
1628
1149
self._pipe.send(('getattr', name))
1629
1150
data = self._pipe.recv()
1634
1155
self._pipe.send(('funcall', name, args, kwargs))
1635
1156
return self._pipe.recv()[1]
1636
1157
return func
1637
1158
1638
1159
def __setattr__(self, name, value):
1639
if name == '_pipe':
1160
if(name == '_pipe'):
1640
1161
return super(ProxyClient, self).__setattr__(name, value)
1641
1162
self._pipe.send(('setattr', name, value))
1642
1163
1653
1174
unicode(self.client_address))
1654
1175
logger.debug("Pipe FD: %d",
1655
1176
self.server.child_pipe.fileno())
1656
1177
1657
1178
session = (gnutls.connection
1658
1179
.ClientSession(self.request,
1659
1180
gnutls.connection
1660
1181
.X509Credentials()))
1661
1182
1662
1183
# Note: gnutls.connection.X509Credentials is really a
1663
1184
# generic GnuTLS certificate credentials object so long as
1664
1185
# no X.509 keys are added to it. Therefore, we can use it
1665
1186
# here despite using OpenPGP certificates.
1666
1187
1667
1188
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1668
1189
# "+AES-256-CBC", "+SHA1",
1669
1190
# "+COMP-NULL", "+CTYPE-OPENPGP",
1675
1196
(gnutls.library.functions
1676
1197
.gnutls_priority_set_direct(session._c_object,
1677
1198
priority, None))
1678
1199
1679
1200
# Start communication using the Mandos protocol
1680
1201
# Get protocol number
1681
1202
line = self.request.makefile().readline()
1682
1203
logger.debug("Protocol version: %r", line)
1683
1204
try:
1684
1205
if int(line.strip().split()[0]) > 1:
1685
raise RuntimeError(line)
1686
except (ValueError, IndexError, RuntimeError) as error:
1206
raise RuntimeError
1207
except (ValueError, IndexError, RuntimeError), error:
1687
1208
logger.error("Unknown protocol version: %s", error)
1688
1209
return
1689
1210
1690
1211
# Start GnuTLS connection
1691
1212
try:
1692
1213
session.handshake()
1693
except gnutls.errors.GNUTLSError as error:
1214
except gnutls.errors.GNUTLSError, error:
1694
1215
logger.warning("Handshake failed: %s", error)
1695
1216
# Do not run session.bye() here: the session is not
1696
1217
# established. Just abandon the request.
1697
1218
return
1698
1219
logger.debug("Handshake succeeded")
1699
1220
1700
1221
approval_required = False
1701
1222
try:
1702
1223
try:
1703
1224
fpr = self.fingerprint(self.peer_certificate
1704
1225
(session))
1705
except (TypeError,
1706
gnutls.errors.GNUTLSError) as error:
1226
except (TypeError, gnutls.errors.GNUTLSError), error:
1707
1227
logger.warning("Bad certificate: %s", error)
1708
1228
return
1709
1229
logger.debug("Fingerprint: %s", fpr)
1710
1230
1711
1231
try:
1712
1232
client = ProxyClient(child_pipe, fpr,
1713
1233
self.client_address)
1721
1241
1722
1242
while True:
1723
1243
if not client.enabled:
1724
logger.info("Client %s is disabled",
1244
logger.warning("Client %s is disabled",
1725
1245
client.name)
1726
1246
if self.server.use_dbus:
1727
1247
# Emit D-Bus signal
1728
client.Rejected("Disabled")
1248
client.Rejected("Disabled")
1729
1249
return
1730
1250
1731
if client.approved or not client.approval_delay:
1251
if client._approved or not client.approval_delay:
1732
1252
#We are approved or approval is disabled
1733
1253
break
1734
elif client.approved is None:
1254
elif client._approved is None:
1735
1255
logger.info("Client %s needs approval",
1736
1256
client.name)
1737
1257
if self.server.use_dbus:
1738
1258
# Emit D-Bus signal
1739
1259
client.NeedApproval(
1740
client.approval_delay.total_seconds()
1741
* 1000, client.approved_by_default)
1260
client.approval_delay_milliseconds(),
1261
client.approved_by_default)
1742
1262
else:
1743
1263
logger.warning("Client %s was not approved",
1744
1264
client.name)
1748
1268
return
1749
1269
1750
1270
#wait until timeout or approved
1271
#x = float(client._timedelta_to_milliseconds(delay))
1751
1272
time = datetime.datetime.now()
1752
1273
client.changedstate.acquire()
1753
client.changedstate.wait(delay.total_seconds())
1274
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1754
1275
client.changedstate.release()
1755
1276
time2 = datetime.datetime.now()
1756
1277
if (time2 - time) >= delay:
1771
1292
while sent_size < len(client.secret):
1772
1293
try:
1773
1294
sent = session.send(client.secret[sent_size:])
1774
except gnutls.errors.GNUTLSError as error:
1775
logger.warning("gnutls send failed",
1776
exc_info=error)
1295
except (gnutls.errors.GNUTLSError), error:
1296
logger.warning("gnutls send failed")
1777
1297
return
1778
1298
logger.debug("Sent: %d, remaining: %d",
1779
1299
sent, len(client.secret)
1780
1300
- (sent_size + sent))
1781
1301
sent_size += sent
1782
1302
1783
1303
logger.info("Sending secret to %s", client.name)
1784
# bump the timeout using extended_timeout
1785
client.bump_timeout(client.extended_timeout)
1304
# bump the timeout as if seen
1305
client.checked_ok()
1786
1306
if self.server.use_dbus:
1787
1307
# Emit D-Bus signal
1788
1308
client.GotSecret()
1792
1312
client.approvals_pending -= 1
1793
1313
try:
1794
1314
session.bye()
1795
except gnutls.errors.GNUTLSError as error:
1796
logger.warning("GnuTLS bye failed",
1797
exc_info=error)
1315
except (gnutls.errors.GNUTLSError), error:
1316
logger.warning("GnuTLS bye failed")
1798
1317
1799
1318
@staticmethod
1800
1319
def peer_certificate(session):
1856
1375
# Convert the buffer to a Python bytestring
1857
1376
fpr = ctypes.string_at(buf, buf_len.value)
1858
1377
# Convert the bytestring to hexadecimal notation
1859
hex_fpr = binascii.hexlify(fpr).upper()
1378
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1860
1379
return hex_fpr
1861
1380
1862
1381
1865
1384
def sub_process_main(self, request, address):
1866
1385
try:
1867
1386
self.finish_request(request, address)
1868
except Exception:
1387
except:
1869
1388
self.handle_error(request, address)
1870
1389
self.close_request(request)
1871
1390
1872
1391
def process_request(self, request, address):
1873
1392
"""Start a new process to process the request."""
1874
proc = multiprocessing.Process(target = self.sub_process_main,
1875
args = (request, address))
1876
proc.start()
1877
return proc
1878
1393
multiprocessing.Process(target = self.sub_process_main,
1394
args = (request, address)).start()
1879
1395
1880
1396
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1881
1397
""" adds a pipe to the MixIn """
1885
1401
This function creates a new pipe in self.pipe
1886
1402
"""
1887
1403
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1888
1889
proc = MultiprocessingMixIn.process_request(self, request,
1890
client_address)
1404
1405
super(MultiprocessingMixInWithPipe,
1406
self).process_request(request, client_address)
1891
1407
self.child_pipe.close()
1892
self.add_pipe(parent_pipe, proc)
1893
1894
def add_pipe(self, parent_pipe, proc):
1408
self.add_pipe(parent_pipe)
1409
1410
def add_pipe(self, parent_pipe):
1895
1411
"""Dummy function; override as necessary"""
1896
raise NotImplementedError()
1897
1412
raise NotImplementedError
1898
1413
1899
1414
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1900
1415
socketserver.TCPServer, object):
1906
1421
use_ipv6: Boolean; to use IPv6 or not
1907
1422
"""
1908
1423
def __init__(self, server_address, RequestHandlerClass,
1909
interface=None, use_ipv6=True, socketfd=None):
1910
"""If socketfd is set, use that file descriptor instead of
1911
creating a new one with socket.socket().
1912
"""
1424
interface=None, use_ipv6=True):
1913
1425
self.interface = interface
1914
1426
if use_ipv6:
1915
1427
self.address_family = socket.AF_INET6
1916
if socketfd is not None:
1917
# Save the file descriptor
1918
self.socketfd = socketfd
1919
# Save the original socket.socket() function
1920
self.socket_socket = socket.socket
1921
# To implement --socket, we monkey patch socket.socket.
1922
#
1923
# (When socketserver.TCPServer is a new-style class, we
1924
# could make self.socket into a property instead of monkey
1925
# patching socket.socket.)
1926
#
1927
# Create a one-time-only replacement for socket.socket()
1928
@functools.wraps(socket.socket)
1929
def socket_wrapper(*args, **kwargs):
1930
# Restore original function so subsequent calls are
1931
# not affected.
1932
socket.socket = self.socket_socket
1933
del self.socket_socket
1934
# This time only, return a new socket object from the
1935
# saved file descriptor.
1936
return socket.fromfd(self.socketfd, *args, **kwargs)
1937
# Replace socket.socket() function with wrapper
1938
socket.socket = socket_wrapper
1939
# The socketserver.TCPServer.__init__ will call
1940
# socket.socket(), which might be our replacement,
1941
# socket_wrapper(), if socketfd was set.
1942
1428
socketserver.TCPServer.__init__(self, server_address,
1943
1429
RequestHandlerClass)
1944
1945
1430
def server_bind(self):
1946
1431
"""This overrides the normal server_bind() function
1947
1432
to bind to an interface if one was specified, and also NOT to
1955
1440
try:
1956
1441
self.socket.setsockopt(socket.SOL_SOCKET,
1957
1442
SO_BINDTODEVICE,
1958
(self.interface + "\0")
1959
.encode("utf-8"))
1960
except socket.error as error:
1961
if error.errno == errno.EPERM:
1962
logger.error("No permission to bind to"
1963
" interface %s", self.interface)
1964
elif error.errno == errno.ENOPROTOOPT:
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:
1965
1451
logger.error("SO_BINDTODEVICE not available;"
1966
1452
" cannot bind to interface %s",
1967
1453
self.interface)
1968
elif error.errno == errno.ENODEV:
1969
logger.error("Interface %s does not exist,"
1970
" cannot bind", self.interface)
1971
1454
else:
1972
1455
raise
1973
1456
# Only bind(2) the socket if we really need to.
1976
1459
if self.address_family == socket.AF_INET6:
1977
1460
any_address = "::" # in6addr_any
1978
1461
else:
1979
any_address = "0.0.0.0" # INADDR_ANY
1462
any_address = socket.INADDR_ANY
1980
1463
self.server_address = (any_address,
1981
1464
self.server_address[1])
1982
1465
elif not self.server_address[1]:
2003
1486
"""
2004
1487
def __init__(self, server_address, RequestHandlerClass,
2005
1488
interface=None, use_ipv6=True, clients=None,
2006
gnutls_priority=None, use_dbus=True, socketfd=None):
1489
gnutls_priority=None, use_dbus=True):
2007
1490
self.enabled = False
2008
1491
self.clients = clients
2009
1492
if self.clients is None:
2010
self.clients = {}
1493
self.clients = set()
2011
1494
self.use_dbus = use_dbus
2012
1495
self.gnutls_priority = gnutls_priority
2013
1496
IPv6_TCPServer.__init__(self, server_address,
2014
1497
RequestHandlerClass,
2015
1498
interface = interface,
2016
use_ipv6 = use_ipv6,
2017
socketfd = socketfd)
1499
use_ipv6 = use_ipv6)
2018
1500
def server_activate(self):
2019
1501
if self.enabled:
2020
1502
return socketserver.TCPServer.server_activate(self)
2021
2022
1503
def enable(self):
2023
1504
self.enabled = True
2024
2025
def add_pipe(self, parent_pipe, proc):
1505
def add_pipe(self, parent_pipe):
2026
1506
# Call "handle_ipc" for both data and EOF events
2027
1507
gobject.io_add_watch(parent_pipe.fileno(),
2028
1508
gobject.IO_IN | gobject.IO_HUP,
2029
1509
functools.partial(self.handle_ipc,
2030
parent_pipe =
2031
parent_pipe,
2032
proc = proc))
2033
1510
parent_pipe = parent_pipe))
1511
2034
1512
def handle_ipc(self, source, condition, parent_pipe=None,
2035
proc = None, client_object=None):
2036
# error, or the other end of multiprocessing.Pipe has closed
2037
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2038
# Wait for other process to exit
2039
proc.join()
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):
2040
1530
return False
2041
1531
2042
1532
# Read a request from the child
2047
1537
fpr = request[1]
2048
1538
address = request[2]
2049
1539
2050
for c in self.clients.itervalues():
1540
for c in self.clients:
2051
1541
if c.fingerprint == fpr:
2052
1542
client = c
2053
1543
break
2054
1544
else:
2055
logger.info("Client not found for fingerprint: %s, ad"
2056
"dress: %s", fpr, address)
1545
logger.warning("Client not found for fingerprint: %s, ad"
1546
"dress: %s", fpr, address)
2057
1547
if self.use_dbus:
2058
1548
# Emit D-Bus signal
2059
mandos_dbus_service.ClientNotFound(fpr,
2060
address[0])
1549
mandos_dbus_service.ClientNotFound(fpr, address[0])
2061
1550
parent_pipe.send(False)
2062
1551
return False
2063
1552
2064
1553
gobject.io_add_watch(parent_pipe.fileno(),
2065
1554
gobject.IO_IN | gobject.IO_HUP,
2066
1555
functools.partial(self.handle_ipc,
2067
parent_pipe =
2068
parent_pipe,
2069
proc = proc,
2070
client_object =
2071
client))
1556
parent_pipe = parent_pipe,
1557
client_object = client))
2072
1558
parent_pipe.send(True)
2073
# remove the old hook in favor of the new above hook on
2074
# same fileno
1559
# remove the old hook in favor of the new above hook on same fileno
2075
1560
return False
2076
1561
if command == 'funcall':
2077
1562
funcname = request[1]
2078
1563
args = request[2]
2079
1564
kwargs = request[3]
2080
1565
2081
parent_pipe.send(('data', getattr(client_object,
2082
funcname)(*args,
2083
**kwargs)))
2084
1566
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1567
2085
1568
if command == 'getattr':
2086
1569
attrname = request[1]
2087
1570
if callable(client_object.__getattribute__(attrname)):
2088
1571
parent_pipe.send(('function',))
2089
1572
else:
2090
parent_pipe.send(('data', client_object
2091
.__getattribute__(attrname)))
1573
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2092
1574
2093
1575
if command == 'setattr':
2094
1576
attrname = request[1]
2095
1577
value = request[2]
2096
1578
setattr(client_object, attrname, value)
2097
1579
2098
1580
return True
2099
1581
2100
1582
2101
def rfc3339_duration_to_delta(duration):
2102
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2103
2104
>>> rfc3339_duration_to_delta("P7D")
2105
datetime.timedelta(7)
2106
>>> rfc3339_duration_to_delta("PT60S")
2107
datetime.timedelta(0, 60)
2108
>>> rfc3339_duration_to_delta("PT60M")
2109
datetime.timedelta(0, 3600)
2110
>>> rfc3339_duration_to_delta("PT24H")
2111
datetime.timedelta(1)
2112
>>> rfc3339_duration_to_delta("P1W")
2113
datetime.timedelta(7)
2114
>>> rfc3339_duration_to_delta("PT5M30S")
2115
datetime.timedelta(0, 330)
2116
>>> rfc3339_duration_to_delta("P1DT3M20S")
2117
datetime.timedelta(1, 200)
2118
"""
2119
2120
# Parsing an RFC 3339 duration with regular expressions is not
2121
# possible - there would have to be multiple places for the same
2122
# values, like seconds. The current code, while more esoteric, is
2123
# cleaner without depending on a parsing library. If Python had a
2124
# built-in library for parsing we would use it, but we'd like to
2125
# avoid excessive use of external libraries.
2126
2127
# New type for defining tokens, syntax, and semantics all-in-one
2128
Token = collections.namedtuple("Token",
2129
("regexp", # To match token; if
2130
# "value" is not None,
2131
# must have a "group"
2132
# containing digits
2133
"value", # datetime.timedelta or
2134
# None
2135
"followers")) # Tokens valid after
2136
# this token
2137
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2138
# the "duration" ABNF definition in RFC 3339, Appendix A.
2139
token_end = Token(re.compile(r"$"), None, frozenset())
2140
token_second = Token(re.compile(r"(\d+)S"),
2141
datetime.timedelta(seconds=1),
2142
frozenset((token_end,)))
2143
token_minute = Token(re.compile(r"(\d+)M"),
2144
datetime.timedelta(minutes=1),
2145
frozenset((token_second, token_end)))
2146
token_hour = Token(re.compile(r"(\d+)H"),
2147
datetime.timedelta(hours=1),
2148
frozenset((token_minute, token_end)))
2149
token_time = Token(re.compile(r"T"),
2150
None,
2151
frozenset((token_hour, token_minute,
2152
token_second)))
2153
token_day = Token(re.compile(r"(\d+)D"),
2154
datetime.timedelta(days=1),
2155
frozenset((token_time, token_end)))
2156
token_month = Token(re.compile(r"(\d+)M"),
2157
datetime.timedelta(weeks=4),
2158
frozenset((token_day, token_end)))
2159
token_year = Token(re.compile(r"(\d+)Y"),
2160
datetime.timedelta(weeks=52),
2161
frozenset((token_month, token_end)))
2162
token_week = Token(re.compile(r"(\d+)W"),
2163
datetime.timedelta(weeks=1),
2164
frozenset((token_end,)))
2165
token_duration = Token(re.compile(r"P"), None,
2166
frozenset((token_year, token_month,
2167
token_day, token_time,
2168
token_week)))
2169
# Define starting values
2170
value = datetime.timedelta() # Value so far
2171
found_token = None
2172
followers = frozenset((token_duration,)) # Following valid tokens
2173
s = duration # String left to parse
2174
# Loop until end token is found
2175
while found_token is not token_end:
2176
# Search for any currently valid tokens
2177
for token in followers:
2178
match = token.regexp.match(s)
2179
if match is not None:
2180
# Token found
2181
if token.value is not None:
2182
# Value found, parse digits
2183
factor = int(match.group(1), 10)
2184
# Add to value so far
2185
value += factor * token.value
2186
# Strip token from string
2187
s = token.regexp.sub("", s, 1)
2188
# Go to found token
2189
found_token = token
2190
# Set valid next tokens
2191
followers = found_token.followers
2192
break
2193
else:
2194
# No currently valid tokens were found
2195
raise ValueError("Invalid RFC 3339 duration")
2196
# End token found
2197
return value
2198
2199
2200
1583
def string_to_delta(interval):
2201
1584
"""Parse a string and return a datetime.timedelta
2202
1585
2213
1596
>>> string_to_delta('5m 30s')
2214
1597
datetime.timedelta(0, 330)
2215
1598
"""
2216
2217
try:
2218
return rfc3339_duration_to_delta(interval)
2219
except ValueError:
2220
pass
2221
2222
1599
timevalue = datetime.timedelta(0)
2223
1600
for s in interval.split():
2224
1601
try:
2225
suffix = s[-1]
1602
suffix = unicode(s[-1])
2226
1603
value = int(s[:-1])
2227
1604
if suffix == "d":
2228
1605
delta = datetime.timedelta(value)
2235
1612
elif suffix == "w":
2236
1613
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2237
1614
else:
2238
raise ValueError("Unknown suffix {!r}"
2239
.format(suffix))
2240
except IndexError as e:
1615
raise ValueError("Unknown suffix %r" % suffix)
1616
except (ValueError, IndexError), e:
2241
1617
raise ValueError(*(e.args))
2242
1618
timevalue += delta
2243
1619
return timevalue
2244
1620
2245
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
2246
1646
def daemon(nochdir = False, noclose = False):
2247
1647
"""See daemon(3). Standard BSD Unix function.
2248
1648
2256
1656
sys.exit()
2257
1657
if not noclose:
2258
1658
# Close all standard open file descriptors
2259
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1659
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2260
1660
if not stat.S_ISCHR(os.fstat(null).st_mode):
2261
raise OSError(errno.ENODEV, "{} not a character device"
2262
.format(os.devnull))
1661
raise OSError(errno.ENODEV,
1662
"%s not a character device"
1663
% os.path.devnull)
2263
1664
os.dup2(null, sys.stdin.fileno())
2264
1665
os.dup2(null, sys.stdout.fileno())
2265
1666
os.dup2(null, sys.stderr.fileno())
2272
1673
##################################################################
2273
1674
# Parsing of options, both command line and config file
2274
1675
2275
parser = argparse.ArgumentParser()
2276
parser.add_argument("-v", "--version", action="version",
2277
version = "%(prog)s {}".format(version),
2278
help="show version number and exit")
2279
parser.add_argument("-i", "--interface", metavar="IF",
2280
help="Bind to interface IF")
2281
parser.add_argument("-a", "--address",
2282
help="Address to listen for requests on")
2283
parser.add_argument("-p", "--port", type=int,
2284
help="Port number to receive requests on")
2285
parser.add_argument("--check", action="store_true",
2286
help="Run self-test")
2287
parser.add_argument("--debug", action="store_true",
2288
help="Debug mode; run in foreground and log"
2289
" to terminal", default=None)
2290
parser.add_argument("--debuglevel", metavar="LEVEL",
2291
help="Debug level for stdout output")
2292
parser.add_argument("--priority", help="GnuTLS"
2293
" priority string (see GnuTLS documentation)")
2294
parser.add_argument("--servicename",
2295
metavar="NAME", help="Zeroconf service name")
2296
parser.add_argument("--configdir",
2297
default="/etc/mandos", metavar="DIR",
2298
help="Directory to search for configuration"
2299
" files")
2300
parser.add_argument("--no-dbus", action="store_false",
2301
dest="use_dbus", help="Do not provide D-Bus"
2302
" system bus interface", default=None)
2303
parser.add_argument("--no-ipv6", action="store_false",
2304
dest="use_ipv6", help="Do not use IPv6",
2305
default=None)
2306
parser.add_argument("--no-restore", action="store_false",
2307
dest="restore", help="Do not restore stored"
2308
" state", default=None)
2309
parser.add_argument("--socket", type=int,
2310
help="Specify a file descriptor to a network"
2311
" socket to use instead of creating one")
2312
parser.add_argument("--statedir", metavar="DIR",
2313
help="Directory to save/restore state in")
2314
parser.add_argument("--foreground", action="store_true",
2315
help="Run in foreground", default=None)
2316
parser.add_argument("--no-zeroconf", action="store_false",
2317
dest="zeroconf", help="Do not use Zeroconf",
2318
default=None)
2319
2320
options = parser.parse_args()
1676
parser = optparse.OptionParser(version = "%%prog %s" % version)
1677
parser.add_option("-i", "--interface", type="string",
1678
metavar="IF", help="Bind to interface IF")
1679
parser.add_option("-a", "--address", type="string",
1680
help="Address to listen for requests on")
1681
parser.add_option("-p", "--port", type="int",
1682
help="Port number to receive requests on")
1683
parser.add_option("--check", action="store_true",
1684
help="Run self-test")
1685
parser.add_option("--debug", action="store_true",
1686
help="Debug mode; run in foreground and log to"
1687
" terminal")
1688
parser.add_option("--debuglevel", type="string", metavar="LEVEL",
1689
help="Debug level for stdout output")
1690
parser.add_option("--priority", type="string", help="GnuTLS"
1691
" priority string (see GnuTLS documentation)")
1692
parser.add_option("--servicename", type="string",
1693
metavar="NAME", help="Zeroconf service name")
1694
parser.add_option("--configdir", type="string",
1695
default="/etc/mandos", metavar="DIR",
1696
help="Directory to search for configuration"
1697
" files")
1698
parser.add_option("--no-dbus", action="store_false",
1699
dest="use_dbus", help="Do not provide D-Bus"
1700
" system bus interface")
1701
parser.add_option("--no-ipv6", action="store_false",
1702
dest="use_ipv6", help="Do not use IPv6")
1703
options = parser.parse_args()[0]
2321
1704
2322
1705
if options.check:
2323
1706
import doctest
2324
fail_count, test_count = doctest.testmod()
2325
sys.exit(os.EX_OK if fail_count == 0 else 1)
1707
doctest.testmod()
1708
sys.exit()
2326
1709
2327
1710
# Default values for config file for server-global settings
2328
1711
server_defaults = { "interface": "",
2330
1713
"port": "",
2331
1714
"debug": "False",
2332
1715
"priority":
2333
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1716
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2334
1717
"servicename": "Mandos",
2335
1718
"use_dbus": "True",
2336
1719
"use_ipv6": "True",
2337
1720
"debuglevel": "",
2338
"restore": "True",
2339
"socket": "",
2340
"statedir": "/var/lib/mandos",
2341
"foreground": "False",
2342
"zeroconf": "True",
2343
1721
}
2344
1722
2345
1723
# Parse config file for server-global settings
2350
1728
# Convert the SafeConfigParser object to a dict
2351
1729
server_settings = server_config.defaults()
2352
1730
# Use the appropriate methods on the non-string config options
2353
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1731
for option in ("debug", "use_dbus", "use_ipv6"):
2354
1732
server_settings[option] = server_config.getboolean("DEFAULT",
2355
1733
option)
2356
1734
if server_settings["port"]:
2357
1735
server_settings["port"] = server_config.getint("DEFAULT",
2358
1736
"port")
2359
if server_settings["socket"]:
2360
server_settings["socket"] = server_config.getint("DEFAULT",
2361
"socket")
2362
# Later, stdin will, and stdout and stderr might, be dup'ed
2363
# over with an opened os.devnull. But we don't want this to
2364
# happen with a supplied network socket.
2365
if 0 <= server_settings["socket"] <= 2:
2366
server_settings["socket"] = os.dup(server_settings
2367
["socket"])
2368
1737
del server_config
2369
1738
2370
1739
# Override the settings from the config file with command line
2371
1740
# options, if set.
2372
1741
for option in ("interface", "address", "port", "debug",
2373
1742
"priority", "servicename", "configdir",
2374
"use_dbus", "use_ipv6", "debuglevel", "restore",
2375
"statedir", "socket", "foreground", "zeroconf"):
1743
"use_dbus", "use_ipv6", "debuglevel"):
2376
1744
value = getattr(options, option)
2377
1745
if value is not None:
2378
1746
server_settings[option] = value
2379
1747
del options
2380
1748
# Force all strings to be unicode
2381
1749
for option in server_settings.keys():
2382
if isinstance(server_settings[option], bytes):
2383
server_settings[option] = (server_settings[option]
2384
.decode("utf-8"))
2385
# Force all boolean options to be boolean
2386
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2387
"foreground", "zeroconf"):
2388
server_settings[option] = bool(server_settings[option])
2389
# Debug implies foreground
2390
if server_settings["debug"]:
2391
server_settings["foreground"] = True
1750
if type(server_settings[option]) is str:
1751
server_settings[option] = unicode(server_settings[option])
2392
1752
# Now we have our good server settings in "server_settings"
2393
1753
2394
1754
##################################################################
2395
1755
2396
if (not server_settings["zeroconf"] and
2397
not (server_settings["port"]
2398
or server_settings["socket"] != "")):
2399
parser.error("Needs port or socket to work without"
2400
" Zeroconf")
2401
2402
1756
# For convenience
2403
1757
debug = server_settings["debug"]
2404
1758
debuglevel = server_settings["debuglevel"]
2405
1759
use_dbus = server_settings["use_dbus"]
2406
1760
use_ipv6 = server_settings["use_ipv6"]
2407
stored_state_path = os.path.join(server_settings["statedir"],
2408
stored_state_file)
2409
foreground = server_settings["foreground"]
2410
zeroconf = server_settings["zeroconf"]
2411
2412
if debug:
2413
initlogger(debug, logging.DEBUG)
2414
else:
2415
if not debuglevel:
2416
initlogger(debug)
2417
else:
2418
level = getattr(logging, debuglevel.upper())
2419
initlogger(debug, level)
2420
1761
2421
1762
if server_settings["servicename"] != "Mandos":
2422
1763
syslogger.setFormatter(logging.Formatter
2423
('Mandos ({}) [%(process)d]:'
2424
' %(levelname)s: %(message)s'
2425
.format(server_settings
2426
["servicename"])))
1764
('Mandos (%s) [%%(process)d]:'
1765
' %%(levelname)s: %%(message)s'
1766
% server_settings["servicename"]))
2427
1767
2428
1768
# Parse config file with clients
2429
client_config = configparser.SafeConfigParser(Client
2430
.client_defaults)
1769
client_defaults = { "timeout": "1h",
1770
"interval": "5m",
1771
"checker": "fping -q -- %%(host)s",
1772
"host": "",
1773
"approval_delay": "0s",
1774
"approval_duration": "1s",
1775
}
1776
client_config = configparser.SafeConfigParser(client_defaults)
2431
1777
client_config.read(os.path.join(server_settings["configdir"],
2432
1778
"clients.conf"))
2433
1779
2434
1780
global mandos_dbus_service
2435
1781
mandos_dbus_service = None
2436
1782
2437
socketfd = None
2438
if server_settings["socket"] != "":
2439
socketfd = server_settings["socket"]
2440
1783
tcp_server = MandosServer((server_settings["address"],
2441
1784
server_settings["port"]),
2442
1785
ClientHandler,
2445
1788
use_ipv6=use_ipv6,
2446
1789
gnutls_priority=
2447
1790
server_settings["priority"],
2448
use_dbus=use_dbus,
2449
socketfd=socketfd)
2450
if not foreground:
2451
pidfilename = "/run/mandos.pid"
2452
if not os.path.isdir("/run/."):
2453
pidfilename = "/var/run/mandos.pid"
2454
pidfile = None
1791
use_dbus=use_dbus)
1792
if not debug:
1793
pidfilename = "/var/run/mandos.pid"
2455
1794
try:
2456
1795
pidfile = open(pidfilename, "w")
2457
except IOError as e:
2458
logger.error("Could not open file %r", pidfilename,
2459
exc_info=e)
1796
except IOError:
1797
logger.error("Could not open file %r", pidfilename)
2460
1798
2461
for name in ("_mandos", "mandos", "nobody"):
1799
try:
1800
uid = pwd.getpwnam("_mandos").pw_uid
1801
gid = pwd.getpwnam("_mandos").pw_gid
1802
except KeyError:
2462
1803
try:
2463
uid = pwd.getpwnam(name).pw_uid
2464
gid = pwd.getpwnam(name).pw_gid
2465
break
1804
uid = pwd.getpwnam("mandos").pw_uid
1805
gid = pwd.getpwnam("mandos").pw_gid
2466
1806
except KeyError:
2467
continue
2468
else:
2469
uid = 65534
2470
gid = 65534
1807
try:
1808
uid = pwd.getpwnam("nobody").pw_uid
1809
gid = pwd.getpwnam("nobody").pw_gid
1810
except KeyError:
1811
uid = 65534
1812
gid = 65534
2471
1813
try:
2472
1814
os.setgid(gid)
2473
1815
os.setuid(uid)
2474
except OSError as error:
2475
if error.errno != errno.EPERM:
2476
raise
1816
except OSError, error:
1817
if error[0] != errno.EPERM:
1818
raise error
2477
1819
1820
if not debug and not debuglevel:
1821
syslogger.setLevel(logging.WARNING)
1822
console.setLevel(logging.WARNING)
1823
if debuglevel:
1824
level = getattr(logging, debuglevel.upper())
1825
syslogger.setLevel(level)
1826
console.setLevel(level)
1827
2478
1828
if debug:
2479
1829
# Enable all possible GnuTLS debugging
2480
1830
2490
1840
.gnutls_global_set_log_function(debug_gnutls))
2491
1841
2492
1842
# Redirect stdin so all checkers get /dev/null
2493
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1843
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2494
1844
os.dup2(null, sys.stdin.fileno())
2495
1845
if null > 2:
2496
1846
os.close(null)
1847
else:
1848
# No console logging
1849
logger.removeHandler(console)
2497
1850
2498
1851
# Need to fork before connecting to D-Bus
2499
if not foreground:
1852
if not debug:
2500
1853
# Close all input and output, do double fork, etc.
2501
1854
daemon()
2502
1855
2503
# multiprocessing will use threads, so before we use gobject we
2504
# need to inform gobject that threads will be used.
2505
gobject.threads_init()
2506
2507
1856
global main_loop
2508
1857
# From the Avahi example code
2509
DBusGMainLoop(set_as_default=True)
1858
DBusGMainLoop(set_as_default=True )
2510
1859
main_loop = gobject.MainLoop()
2511
1860
bus = dbus.SystemBus()
2512
1861
# End of Avahi example code
2513
1862
if use_dbus:
2514
1863
try:
2515
bus_name = dbus.service.BusName("se.recompile.Mandos",
1864
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2516
1865
bus, do_not_queue=True)
2517
old_bus_name = (dbus.service.BusName
2518
("se.bsnet.fukt.Mandos", bus,
2519
do_not_queue=True))
2520
except dbus.exceptions.NameExistsException as e:
2521
logger.error("Disabling D-Bus:", exc_info=e)
1866
except dbus.exceptions.NameExistsException, e:
1867
logger.error(unicode(e) + ", disabling D-Bus")
2522
1868
use_dbus = False
2523
1869
server_settings["use_dbus"] = False
2524
1870
tcp_server.use_dbus = False
2525
if zeroconf:
2526
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2527
service = AvahiServiceToSyslog(name =
2528
server_settings["servicename"],
2529
servicetype = "_mandos._tcp",
2530
protocol = protocol, bus = bus)
2531
if server_settings["interface"]:
2532
service.interface = (if_nametoindex
2533
(server_settings["interface"]
2534
.encode("utf-8")))
1871
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1872
service = AvahiService(name = server_settings["servicename"],
1873
servicetype = "_mandos._tcp",
1874
protocol = protocol, bus = bus)
1875
if server_settings["interface"]:
1876
service.interface = (if_nametoindex
1877
(str(server_settings["interface"])))
2535
1878
2536
1879
global multiprocessing_manager
2537
1880
multiprocessing_manager = multiprocessing.Manager()
2539
1882
client_class = Client
2540
1883
if use_dbus:
2541
1884
client_class = functools.partial(ClientDBus, bus = bus)
2542
2543
client_settings = Client.config_parser(client_config)
2544
old_client_settings = {}
2545
clients_data = {}
2546
2547
# This is used to redirect stdout and stderr for checker processes
2548
global wnull
2549
wnull = open(os.devnull, "w") # A writable /dev/null
2550
# Only used if server is running in foreground but not in debug
2551
# mode
2552
if debug or not foreground:
2553
wnull.close()
2554
2555
# Get client data and settings from last running state.
2556
if server_settings["restore"]:
2557
try:
2558
with open(stored_state_path, "rb") as stored_state:
2559
clients_data, old_client_settings = (pickle.load
2560
(stored_state))
2561
os.remove(stored_state_path)
2562
except IOError as e:
2563
if e.errno == errno.ENOENT:
2564
logger.warning("Could not load persistent state: {}"
2565
.format(os.strerror(e.errno)))
2566
else:
2567
logger.critical("Could not load persistent state:",
2568
exc_info=e)
2569
raise
2570
except EOFError as e:
2571
logger.warning("Could not load persistent state: "
2572
"EOFError:", exc_info=e)
2573
2574
with PGPEngine() as pgp:
2575
for client_name, client in clients_data.items():
2576
# Skip removed clients
2577
if client_name not in client_settings:
2578
continue
2579
2580
# Decide which value to use after restoring saved state.
2581
# We have three different values: Old config file,
2582
# new config file, and saved state.
2583
# New config value takes precedence if it differs from old
2584
# config value, otherwise use saved state.
2585
for name, value in client_settings[client_name].items():
2586
try:
2587
# For each value in new config, check if it
2588
# differs from the old config value (Except for
2589
# the "secret" attribute)
2590
if (name != "secret" and
2591
value != old_client_settings[client_name]
2592
[name]):
2593
client[name] = value
2594
except KeyError:
2595
pass
2596
2597
# Clients who has passed its expire date can still be
2598
# enabled if its last checker was successful. Clients
2599
# whose checker succeeded before we stored its state is
2600
# assumed to have successfully run all checkers during
2601
# downtime.
2602
if client["enabled"]:
2603
if datetime.datetime.utcnow() >= client["expires"]:
2604
if not client["last_checked_ok"]:
2605
logger.warning(
2606
"disabling client {} - Client never "
2607
"performed a successful checker"
2608
.format(client_name))
2609
client["enabled"] = False
2610
elif client["last_checker_status"] != 0:
2611
logger.warning(
2612
"disabling client {} - Client last"
2613
" checker failed with error code {}"
2614
.format(client_name,
2615
client["last_checker_status"]))
2616
client["enabled"] = False
2617
else:
2618
client["expires"] = (datetime.datetime
2619
.utcnow()
2620
+ client["timeout"])
2621
logger.debug("Last checker succeeded,"
2622
" keeping {} enabled"
2623
.format(client_name))
1885
def client_config_items(config, section):
1886
special_settings = {
1887
"approved_by_default":
1888
lambda: config.getboolean(section,
1889
"approved_by_default"),
1890
}
1891
for name, value in config.items(section):
2624
1892
try:
2625
client["secret"] = (
2626
pgp.decrypt(client["encrypted_secret"],
2627
client_settings[client_name]
2628
["secret"]))
2629
except PGPError:
2630
# If decryption fails, we use secret from new settings
2631
logger.debug("Failed to decrypt {} old secret"
2632
.format(client_name))
2633
client["secret"] = (
2634
client_settings[client_name]["secret"])
2635
2636
# Add/remove clients based on new changes made to config
2637
for client_name in (set(old_client_settings)
2638
- set(client_settings)):
2639
del clients_data[client_name]
2640
for client_name in (set(client_settings)
2641
- set(old_client_settings)):
2642
clients_data[client_name] = client_settings[client_name]
2643
2644
# Create all client objects
2645
for client_name, client in clients_data.items():
2646
tcp_server.clients[client_name] = client_class(
2647
name = client_name, settings = client,
2648
server_settings = server_settings)
2649
1893
yield (name, special_settings[name]())
1894
except KeyError:
1895
yield (name, value)
1896
1897
tcp_server.clients.update(set(
1898
client_class(name = section,
1899
config= dict(client_config_items(
1900
client_config, section)))
1901
for section in client_config.sections()))
2650
1902
if not tcp_server.clients:
2651
1903
logger.warning("No clients defined")
2652
2653
if not foreground:
2654
if pidfile is not None:
2655
try:
2656
with pidfile:
2657
pid = os.getpid()
2658
pidfile.write("{}\n".format(pid).encode("utf-8"))
2659
except IOError:
2660
logger.error("Could not write to file %r with PID %d",
2661
pidfilename, pid)
2662
del pidfile
1904
1905
if not debug:
1906
try:
1907
with pidfile:
1908
pid = os.getpid()
1909
pidfile.write(str(pid) + "\n".encode("utf-8"))
1910
del pidfile
1911
except IOError:
1912
logger.error("Could not write to file %r with PID %d",
1913
pidfilename, pid)
1914
except NameError:
1915
# "pidfile" was never created
1916
pass
2663
1917
del pidfilename
2664
1918
1919
signal.signal(signal.SIGINT, signal.SIG_IGN)
1920
2665
1921
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2666
1922
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2667
1923
2668
1924
if use_dbus:
2669
@alternate_dbus_interfaces({"se.recompile.Mandos":
2670
"se.bsnet.fukt.Mandos"})
2671
class MandosDBusService(DBusObjectWithProperties):
1925
class MandosDBusService(dbus.service.Object):
2672
1926
"""A D-Bus proxy object"""
2673
1927
def __init__(self):
2674
1928
dbus.service.Object.__init__(self, bus, "/")
2675
_interface = "se.recompile.Mandos"
2676
2677
@dbus_interface_annotations(_interface)
2678
def _foo(self):
2679
return { "org.freedesktop.DBus.Property"
2680
".EmitsChangedSignal":
2681
"false"}
1929
_interface = "se.bsnet.fukt.Mandos"
2682
1930
2683
1931
@dbus.service.signal(_interface, signature="o")
2684
1932
def ClientAdded(self, objpath):
2699
1947
def GetAllClients(self):
2700
1948
"D-Bus method"
2701
1949
return dbus.Array(c.dbus_object_path
2702
for c in
2703
tcp_server.clients.itervalues())
1950
for c in tcp_server.clients)
2704
1951
2705
1952
@dbus.service.method(_interface,
2706
1953
out_signature="a{oa{sv}}")
2708
1955
"D-Bus method"
2709
1956
return dbus.Dictionary(
2710
1957
((c.dbus_object_path, c.GetAll(""))
2711
for c in tcp_server.clients.itervalues()),
1958
for c in tcp_server.clients),
2712
1959
signature="oa{sv}")
2713
1960
2714
1961
@dbus.service.method(_interface, in_signature="o")
2715
1962
def RemoveClient(self, object_path):
2716
1963
"D-Bus method"
2717
for c in tcp_server.clients.itervalues():
1964
for c in tcp_server.clients:
2718
1965
if c.dbus_object_path == object_path:
2719
del tcp_server.clients[c.name]
1966
tcp_server.clients.remove(c)
2720
1967
c.remove_from_connection()
2721
1968
# Don't signal anything except ClientRemoved
2722
1969
c.disable(quiet=True)
2731
1978
2732
1979
def cleanup():
2733
1980
"Cleanup function; run on exit"
2734
if zeroconf:
2735
service.cleanup()
2736
2737
multiprocessing.active_children()
2738
wnull.close()
2739
if not (tcp_server.clients or client_settings):
2740
return
2741
2742
# Store client before exiting. Secrets are encrypted with key
2743
# based on what config file has. If config file is
2744
# removed/edited, old secret will thus be unrecovable.
2745
clients = {}
2746
with PGPEngine() as pgp:
2747
for client in tcp_server.clients.itervalues():
2748
key = client_settings[client.name]["secret"]
2749
client.encrypted_secret = pgp.encrypt(client.secret,
2750
key)
2751
client_dict = {}
2752
2753
# A list of attributes that can not be pickled
2754
# + secret.
2755
exclude = { "bus", "changedstate", "secret",
2756
"checker", "server_settings" }
2757
for name, typ in (inspect.getmembers
2758
(dbus.service.Object)):
2759
exclude.add(name)
2760
2761
client_dict["encrypted_secret"] = (client
2762
.encrypted_secret)
2763
for attr in client.client_structure:
2764
if attr not in exclude:
2765
client_dict[attr] = getattr(client, attr)
2766
2767
clients[client.name] = client_dict
2768
del client_settings[client.name]["secret"]
2769
2770
try:
2771
with (tempfile.NamedTemporaryFile
2772
(mode='wb', suffix=".pickle", prefix='clients-',
2773
dir=os.path.dirname(stored_state_path),
2774
delete=False)) as stored_state:
2775
pickle.dump((clients, client_settings), stored_state)
2776
tempname=stored_state.name
2777
os.rename(tempname, stored_state_path)
2778
except (IOError, OSError) as e:
2779
if not debug:
2780
try:
2781
os.remove(tempname)
2782
except NameError:
2783
pass
2784
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2785
logger.warning("Could not save persistent state: {}"
2786
.format(os.strerror(e.errno)))
2787
else:
2788
logger.warning("Could not save persistent state:",
2789
exc_info=e)
2790
raise
2791
2792
# Delete all clients, and settings from config
1981
service.cleanup()
1982
2793
1983
while tcp_server.clients:
2794
name, client = tcp_server.clients.popitem()
1984
client = tcp_server.clients.pop()
2795
1985
if use_dbus:
2796
1986
client.remove_from_connection()
1987
client.disable_hook = None
2797
1988
# Don't signal anything except ClientRemoved
2798
1989
client.disable(quiet=True)
2799
1990
if use_dbus:
2800
1991
# Emit D-Bus signal
2801
mandos_dbus_service.ClientRemoved(client
2802
.dbus_object_path,
1992
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2803
1993
client.name)
2804
client_settings.clear()
2805
1994
2806
1995
atexit.register(cleanup)
2807
1996
2808
for client in tcp_server.clients.itervalues():
1997
for client in tcp_server.clients:
2809
1998
if use_dbus:
2810
1999
# Emit D-Bus signal
2811
2000
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2812
# Need to initiate checking of clients
2813
if client.enabled:
2814
client.init_checker()
2001
client.enable()
2815
2002
2816
2003
tcp_server.enable()
2817
2004
tcp_server.server_activate()
2818
2005
2819
2006
# Find out what port we got
2820
if zeroconf:
2821
service.port = tcp_server.socket.getsockname()[1]
2007
service.port = tcp_server.socket.getsockname()[1]
2822
2008
if use_ipv6:
2823
2009
logger.info("Now listening on address %r, port %d,"
2824
" flowinfo %d, scope_id %d",
2825
*tcp_server.socket.getsockname())
2010
" flowinfo %d, scope_id %d"
2011
% tcp_server.socket.getsockname())
2826
2012
else: # IPv4
2827
logger.info("Now listening on address %r, port %d",
2828
*tcp_server.socket.getsockname())
2013
logger.info("Now listening on address %r, port %d"
2014
% tcp_server.socket.getsockname())
2829
2015
2830
2016
#service.interface = tcp_server.socket.getsockname()[3]
2831
2017
2832
2018
try:
2833
if zeroconf:
2834
# From the Avahi example code
2835
try:
2836
service.activate()
2837
except dbus.exceptions.DBusException as error:
2838
logger.critical("D-Bus Exception", exc_info=error)
2839
cleanup()
2840
sys.exit(1)
2841
# End of Avahi example code
2019
# From the Avahi example code
2020
try:
2021
service.activate()
2022
except dbus.exceptions.DBusException, error:
2023
logger.critical("DBusException: %s", error)
2024
cleanup()
2025
sys.exit(1)
2026
# End of Avahi example code
2842
2027
2843
2028
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2844
2029
lambda *args, **kwargs:
2847
2032
2848
2033
logger.debug("Starting main loop")
2849
2034
main_loop.run()
2850
except AvahiError as error:
2851
logger.critical("Avahi Error", exc_info=error)
2035
except AvahiError, error:
2036
logger.critical("AvahiError: %s", error)
2852
2037
cleanup()
2853
2038
sys.exit(1)
2854
2039
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0