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- Committer: Teddy Hogeborn
- Date: 2011-09-19 09:42:55 UTC
- Revision ID: teddy@fukt.bsnet.se-20110919094255-3lji3igz75uog8lh
* mandos-clients.conf.xml (OPTIONS): Moved up "extended_timeout" to
order options alphabetically.
* clients.conf: Language change in comment.
order options alphabetically.
* clients.conf: Language change in comment.
- files removed:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python2.7
1
#!/usr/bin/python
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# -*- mode: python; coding: utf-8 -*-
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#
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# Mandos server - give out binary blobs to connecting clients.
11
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# "AvahiService" class, and some lines in "main".
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#
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# Everything else is
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# Copyright © 2008-2014 Teddy Hogeborn
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# Copyright © 2008-2014 Björn Påhlsson
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# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@recompile.se>.
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# Contact the authors at <mandos@fukt.bsnet.se>.
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#
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from __future__ import (division, absolute_import, print_function,
35
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unicode_literals)
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36
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from future_builtins import *
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import SocketServer as socketserver
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import socket
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import argparse
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import functools
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import cPickle as pickle
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64
import multiprocessing
67
import types
68
import binascii
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import tempfile
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import itertools
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import collections
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65
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import dbus
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import dbus.service
88
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except ImportError:
89
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SO_BINDTODEVICE = None
90
83
91
if sys.version_info.major == 2:
92
str = unicode
93
94
version = "1.6.9"
95
stored_state_file = "clients.pickle"
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97
logger = logging.getLogger()
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syslogger = None
99
100
try:
101
if_nametoindex = (ctypes.cdll.LoadLibrary
102
(ctypes.util.find_library("c"))
103
.if_nametoindex)
104
except (OSError, AttributeError):
105
def if_nametoindex(interface):
106
"Get an interface index the hard way, i.e. using fcntl()"
107
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
108
with contextlib.closing(socket.socket()) as s:
109
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
110
struct.pack(b"16s16x", interface))
111
interface_index = struct.unpack("I", ifreq[16:20])[0]
112
return interface_index
113
114
115
def initlogger(debug, level=logging.WARNING):
116
"""init logger and add loglevel"""
117
118
global syslogger
119
syslogger = (logging.handlers.SysLogHandler
120
(facility =
121
logging.handlers.SysLogHandler.LOG_DAEMON,
122
address = "/dev/log"))
123
syslogger.setFormatter(logging.Formatter
124
('Mandos [%(process)d]: %(levelname)s:'
125
' %(message)s'))
126
logger.addHandler(syslogger)
127
128
if debug:
129
console = logging.StreamHandler()
130
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
131
' [%(process)d]:'
132
' %(levelname)s:'
133
' %(message)s'))
134
logger.addHandler(console)
135
logger.setLevel(level)
136
137
138
class PGPError(Exception):
139
"""Exception if encryption/decryption fails"""
140
pass
141
142
143
class PGPEngine(object):
144
"""A simple class for OpenPGP symmetric encryption & decryption"""
145
def __init__(self):
146
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
147
self.gnupgargs = ['--batch',
148
'--home', self.tempdir,
149
'--force-mdc',
150
'--quiet',
151
'--no-use-agent']
152
153
def __enter__(self):
154
return self
155
156
def __exit__(self, exc_type, exc_value, traceback):
157
self._cleanup()
158
return False
159
160
def __del__(self):
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self._cleanup()
162
163
def _cleanup(self):
164
if self.tempdir is not None:
165
# Delete contents of tempdir
166
for root, dirs, files in os.walk(self.tempdir,
167
topdown = False):
168
for filename in files:
169
os.remove(os.path.join(root, filename))
170
for dirname in dirs:
171
os.rmdir(os.path.join(root, dirname))
172
# Remove tempdir
173
os.rmdir(self.tempdir)
174
self.tempdir = None
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def password_encode(self, password):
177
# Passphrase can not be empty and can not contain newlines or
178
# NUL bytes. So we prefix it and hex encode it.
179
encoded = b"mandos" + binascii.hexlify(password)
180
if len(encoded) > 2048:
181
# GnuPG can't handle long passwords, so encode differently
182
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
183
.replace(b"\n", b"\\n")
184
.replace(b"\0", b"\\x00"))
185
return encoded
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187
def encrypt(self, data, password):
188
passphrase = self.password_encode(password)
189
with tempfile.NamedTemporaryFile(dir=self.tempdir
190
) as passfile:
191
passfile.write(passphrase)
192
passfile.flush()
193
proc = subprocess.Popen(['gpg', '--symmetric',
194
'--passphrase-file',
195
passfile.name]
196
+ self.gnupgargs,
197
stdin = subprocess.PIPE,
198
stdout = subprocess.PIPE,
199
stderr = subprocess.PIPE)
200
ciphertext, err = proc.communicate(input = data)
201
if proc.returncode != 0:
202
raise PGPError(err)
203
return ciphertext
204
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def decrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(dir = self.tempdir
208
) as passfile:
209
passfile.write(passphrase)
210
passfile.flush()
211
proc = subprocess.Popen(['gpg', '--decrypt',
212
'--passphrase-file',
213
passfile.name]
214
+ self.gnupgargs,
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
218
decrypted_plaintext, err = proc.communicate(input
219
= data)
220
if proc.returncode != 0:
221
raise PGPError(err)
222
return decrypted_plaintext
223
84
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version = "1.3.1"
86
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#logger = logging.getLogger('mandos')
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logger = logging.Logger('mandos')
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syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
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' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
224
102
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103
class AvahiError(Exception):
226
104
def __init__(self, value, *args, **kwargs):
227
105
self.value = value
228
return super(AvahiError, self).__init__(value, *args,
229
**kwargs)
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
230
109
231
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class AvahiServiceError(AvahiError):
232
111
pass
243
122
Used to optionally bind to the specified interface.
244
123
name: string; Example: 'Mandos'
245
124
type: string; Example: '_mandos._tcp'.
246
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
247
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port: integer; what port to announce
248
127
TXT: list of strings; TXT record for the service
249
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domain: string; Domain to publish on, default to .local if empty.
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server: D-Bus Server
256
135
bus: dbus.SystemBus()
257
136
"""
258
259
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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
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servicetype = None, port = None, TXT = None,
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domain = "", host = "", max_renames = 32768,
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self.server = None
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self.bus = bus
276
154
self.entry_group_state_changed_match = None
277
278
155
def rename(self):
279
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"""Derived from the Avahi example code"""
280
157
if self.rename_count >= self.max_renames:
282
159
" after %i retries, exiting.",
283
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self.rename_count)
284
161
raise AvahiServiceError("Too many renames")
285
self.name = str(self.server
286
.GetAlternativeServiceName(self.name))
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
287
163
logger.info("Changing Zeroconf service name to %r ...",
288
164
self.name)
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
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' %%(levelname)s: %%(message)s'
168
% self.name))
289
169
self.remove()
290
170
try:
291
171
self.add()
292
172
except dbus.exceptions.DBusException as error:
293
logger.critical("D-Bus Exception", exc_info=error)
173
logger.critical("DBusException: %s", error)
294
174
self.cleanup()
295
175
os._exit(1)
296
176
self.rename_count += 1
297
298
177
def remove(self):
299
178
"""Derived from the Avahi example code"""
300
179
if self.entry_group_state_changed_match is not None:
302
181
self.entry_group_state_changed_match = None
303
182
if self.group is not None:
304
183
self.group.Reset()
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306
184
def add(self):
307
185
"""Derived from the Avahi example code"""
308
186
self.remove()
313
191
avahi.DBUS_INTERFACE_ENTRY_GROUP)
314
192
self.entry_group_state_changed_match = (
315
193
self.group.connect_to_signal(
316
'StateChanged', self.entry_group_state_changed))
194
'StateChanged', self .entry_group_state_changed))
317
195
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
318
196
self.name, self.type)
319
197
self.group.AddService(
325
203
dbus.UInt16(self.port),
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204
avahi.string_array_to_txt_array(self.TXT))
327
205
self.group.Commit()
328
329
206
def entry_group_state_changed(self, state, error):
330
207
"""Derived from the Avahi example code"""
331
208
logger.debug("Avahi entry group state change: %i", state)
337
214
self.rename()
338
215
elif state == avahi.ENTRY_GROUP_FAILURE:
339
216
logger.critical("Avahi: Error in group state changed %s",
340
str(error))
341
raise AvahiGroupError("State changed: {!s}"
342
.format(error))
343
217
unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
344
220
def cleanup(self):
345
221
"""Derived from the Avahi example code"""
346
222
if self.group is not None:
347
223
try:
348
224
self.group.Free()
349
225
except (dbus.exceptions.UnknownMethodException,
350
dbus.exceptions.DBusException):
226
dbus.exceptions.DBusException) as e:
351
227
pass
352
228
self.group = None
353
229
self.remove()
354
355
230
def server_state_changed(self, state, error=None):
356
231
"""Derived from the Avahi example code"""
357
232
logger.debug("Avahi server state change: %i", state)
376
251
logger.debug("Unknown state: %r", state)
377
252
else:
378
253
logger.debug("Unknown state: %r: %r", state, error)
379
380
254
def activate(self):
381
255
"""Derived from the Avahi example code"""
382
256
if self.server is None:
390
264
self.server_state_changed(self.server.GetState())
391
265
392
266
393
class AvahiServiceToSyslog(AvahiService):
394
def rename(self):
395
"""Add the new name to the syslog messages"""
396
ret = AvahiService.rename(self)
397
syslogger.setFormatter(logging.Formatter
398
('Mandos ({}) [%(process)d]:'
399
' %(levelname)s: %(message)s'
400
.format(self.name)))
401
return ret
402
403
404
267
class Client(object):
405
268
"""A representation of a client host served by this server.
406
269
407
270
Attributes:
408
approved: bool(); 'None' if not yet approved/disapproved
271
_approved: bool(); 'None' if not yet approved/disapproved
409
272
approval_delay: datetime.timedelta(); Time to wait for approval
410
273
approval_duration: datetime.timedelta(); Duration of one approval
411
274
checker: subprocess.Popen(); a running checker process used
418
281
instance %(name)s can be used in the command.
419
282
checker_initiator_tag: a gobject event source tag, or None
420
283
created: datetime.datetime(); (UTC) object creation
421
client_structure: Object describing what attributes a client has
422
and is used for storing the client at exit
423
284
current_checker_command: string; current running checker_command
285
disable_hook: If set, called by disable() as disable_hook(self)
424
286
disable_initiator_tag: a gobject event source tag, or None
425
287
enabled: bool()
426
288
fingerprint: string (40 or 32 hexadecimal digits); used to
429
291
interval: datetime.timedelta(); How often to start a new checker
430
292
last_approval_request: datetime.datetime(); (UTC) or None
431
293
last_checked_ok: datetime.datetime(); (UTC) or None
432
last_checker_status: integer between 0 and 255 reflecting exit
433
status of last checker. -1 reflects crashed
434
checker, -2 means no checker completed yet.
435
last_enabled: datetime.datetime(); (UTC) or None
294
last_enabled: datetime.datetime(); (UTC)
436
295
name: string; from the config file, used in log messages and
437
296
D-Bus identifiers
438
297
secret: bytestring; sent verbatim (over TLS) to client
439
298
timeout: datetime.timedelta(); How long from last_checked_ok
440
299
until this client is disabled
441
extended_timeout: extra long timeout when secret has been sent
300
extended_timeout: extra long timeout when password has been sent
442
301
runtime_expansions: Allowed attributes for runtime expansion.
443
302
expires: datetime.datetime(); time (UTC) when a client will be
444
303
disabled, or None
445
server_settings: The server_settings dict from main()
446
304
"""
447
305
448
306
runtime_expansions = ("approval_delay", "approval_duration",
449
"created", "enabled", "expires",
450
"fingerprint", "host", "interval",
451
"last_approval_request", "last_checked_ok",
307
"created", "enabled", "fingerprint",
308
"host", "interval", "last_checked_ok",
452
309
"last_enabled", "name", "timeout")
453
client_defaults = { "timeout": "PT5M",
454
"extended_timeout": "PT15M",
455
"interval": "PT2M",
456
"checker": "fping -q -- %%(host)s",
457
"host": "",
458
"approval_delay": "PT0S",
459
"approval_duration": "PT1S",
460
"approved_by_default": "True",
461
"enabled": "True",
462
}
463
310
464
311
@staticmethod
465
def config_parser(config):
466
"""Construct a new dict of client settings of this form:
467
{ client_name: {setting_name: value, ...}, ...}
468
with exceptions for any special settings as defined above.
469
NOTE: Must be a pure function. Must return the same result
470
value given the same arguments.
471
"""
472
settings = {}
473
for client_name in config.sections():
474
section = dict(config.items(client_name))
475
client = settings[client_name] = {}
476
477
client["host"] = section["host"]
478
# Reformat values from string types to Python types
479
client["approved_by_default"] = config.getboolean(
480
client_name, "approved_by_default")
481
client["enabled"] = config.getboolean(client_name,
482
"enabled")
483
484
client["fingerprint"] = (section["fingerprint"].upper()
485
.replace(" ", ""))
486
if "secret" in section:
487
client["secret"] = section["secret"].decode("base64")
488
elif "secfile" in section:
489
with open(os.path.expanduser(os.path.expandvars
490
(section["secfile"])),
491
"rb") as secfile:
492
client["secret"] = secfile.read()
493
else:
494
raise TypeError("No secret or secfile for section {}"
495
.format(section))
496
client["timeout"] = string_to_delta(section["timeout"])
497
client["extended_timeout"] = string_to_delta(
498
section["extended_timeout"])
499
client["interval"] = string_to_delta(section["interval"])
500
client["approval_delay"] = string_to_delta(
501
section["approval_delay"])
502
client["approval_duration"] = string_to_delta(
503
section["approval_duration"])
504
client["checker_command"] = section["checker"]
505
client["last_approval_request"] = None
506
client["last_checked_ok"] = None
507
client["last_checker_status"] = -2
508
509
return settings
510
511
def __init__(self, settings, name = None, server_settings=None):
312
def _timedelta_to_milliseconds(td):
313
"Convert a datetime.timedelta() to milliseconds"
314
return ((td.days * 24 * 60 * 60 * 1000)
315
+ (td.seconds * 1000)
316
+ (td.microseconds // 1000))
317
318
def timeout_milliseconds(self):
319
"Return the 'timeout' attribute in milliseconds"
320
return self._timedelta_to_milliseconds(self.timeout)
321
322
def extended_timeout_milliseconds(self):
323
"Return the 'extended_timeout' attribute in milliseconds"
324
return self._timedelta_to_milliseconds(self.extended_timeout)
325
326
def interval_milliseconds(self):
327
"Return the 'interval' attribute in milliseconds"
328
return self._timedelta_to_milliseconds(self.interval)
329
330
def approval_delay_milliseconds(self):
331
return self._timedelta_to_milliseconds(self.approval_delay)
332
333
def __init__(self, name = None, disable_hook=None, config=None):
334
"""Note: the 'checker' key in 'config' sets the
335
'checker_command' attribute and *not* the 'checker'
336
attribute."""
512
337
self.name = name
513
if server_settings is None:
514
server_settings = {}
515
self.server_settings = server_settings
516
# adding all client settings
517
for setting, value in settings.items():
518
setattr(self, setting, value)
519
520
if self.enabled:
521
if not hasattr(self, "last_enabled"):
522
self.last_enabled = datetime.datetime.utcnow()
523
if not hasattr(self, "expires"):
524
self.expires = (datetime.datetime.utcnow()
525
+ self.timeout)
526
else:
527
self.last_enabled = None
528
self.expires = None
529
338
if config is None:
339
config = {}
530
340
logger.debug("Creating client %r", self.name)
531
341
# Uppercase and remove spaces from fingerprint for later
532
342
# comparison purposes with return value from the fingerprint()
533
343
# function
344
self.fingerprint = (config["fingerprint"].upper()
345
.replace(" ", ""))
534
346
logger.debug(" Fingerprint: %s", self.fingerprint)
535
self.created = settings.get("created",
536
datetime.datetime.utcnow())
537
538
# attributes specific for this server instance
347
if "secret" in config:
348
self.secret = config["secret"].decode("base64")
349
elif "secfile" in config:
350
with open(os.path.expanduser(os.path.expandvars
351
(config["secfile"])),
352
"rb") as secfile:
353
self.secret = secfile.read()
354
else:
355
raise TypeError("No secret or secfile for client %s"
356
% self.name)
357
self.host = config.get("host", "")
358
self.created = datetime.datetime.utcnow()
359
self.enabled = False
360
self.last_approval_request = None
361
self.last_enabled = None
362
self.last_checked_ok = None
363
self.timeout = string_to_delta(config["timeout"])
364
self.extended_timeout = string_to_delta(config["extended_timeout"])
365
self.interval = string_to_delta(config["interval"])
366
self.disable_hook = disable_hook
539
367
self.checker = None
540
368
self.checker_initiator_tag = None
541
369
self.disable_initiator_tag = None
370
self.expires = None
542
371
self.checker_callback_tag = None
372
self.checker_command = config["checker"]
543
373
self.current_checker_command = None
544
self.approved = None
374
self.last_connect = None
375
self._approved = None
376
self.approved_by_default = config.get("approved_by_default",
377
True)
545
378
self.approvals_pending = 0
546
self.changedstate = (multiprocessing_manager
547
.Condition(multiprocessing_manager
548
.Lock()))
549
self.client_structure = [attr for attr in
550
self.__dict__.iterkeys()
551
if not attr.startswith("_")]
552
self.client_structure.append("client_structure")
553
554
for name, t in inspect.getmembers(type(self),
555
lambda obj:
556
isinstance(obj,
557
property)):
558
if not name.startswith("_"):
559
self.client_structure.append(name)
379
self.approval_delay = string_to_delta(
380
config["approval_delay"])
381
self.approval_duration = string_to_delta(
382
config["approval_duration"])
383
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
560
384
561
# Send notice to process children that client state has changed
562
385
def send_changedstate(self):
563
with self.changedstate:
564
self.changedstate.notify_all()
565
386
self.changedstate.acquire()
387
self.changedstate.notify_all()
388
self.changedstate.release()
389
566
390
def enable(self):
567
391
"""Start this client's checker and timeout hooks"""
568
392
if getattr(self, "enabled", False):
569
393
# Already enabled
570
394
return
395
self.send_changedstate()
396
self.last_enabled = datetime.datetime.utcnow()
397
# Schedule a new checker to be started an 'interval' from now,
398
# and every interval from then on.
399
self.checker_initiator_tag = (gobject.timeout_add
400
(self.interval_milliseconds(),
401
self.start_checker))
402
# Schedule a disable() when 'timeout' has passed
571
403
self.expires = datetime.datetime.utcnow() + self.timeout
404
self.disable_initiator_tag = (gobject.timeout_add
405
(self.timeout_milliseconds(),
406
self.disable))
572
407
self.enabled = True
573
self.last_enabled = datetime.datetime.utcnow()
574
self.init_checker()
575
self.send_changedstate()
408
# Also start a new checker *right now*.
409
self.start_checker()
576
410
577
411
def disable(self, quiet=True):
578
412
"""Disable this client."""
579
413
if not getattr(self, "enabled", False):
580
414
return False
581
415
if not quiet:
416
self.send_changedstate()
417
if not quiet:
582
418
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", None) is not None:
419
if getattr(self, "disable_initiator_tag", False):
584
420
gobject.source_remove(self.disable_initiator_tag)
585
421
self.disable_initiator_tag = None
586
422
self.expires = None
587
if getattr(self, "checker_initiator_tag", None) is not None:
423
if getattr(self, "checker_initiator_tag", False):
588
424
gobject.source_remove(self.checker_initiator_tag)
589
425
self.checker_initiator_tag = None
590
426
self.stop_checker()
427
if self.disable_hook:
428
self.disable_hook(self)
591
429
self.enabled = False
592
if not quiet:
593
self.send_changedstate()
594
430
# Do not run this again if called by a gobject.timeout_add
595
431
return False
596
432
597
433
def __del__(self):
434
self.disable_hook = None
598
435
self.disable()
599
436
600
def init_checker(self):
601
# Schedule a new checker to be started an 'interval' from now,
602
# and every interval from then on.
603
if self.checker_initiator_tag is not None:
604
gobject.source_remove(self.checker_initiator_tag)
605
self.checker_initiator_tag = (gobject.timeout_add
606
(int(self.interval
607
.total_seconds() * 1000),
608
self.start_checker))
609
# Schedule a disable() when 'timeout' has passed
610
if self.disable_initiator_tag is not None:
611
gobject.source_remove(self.disable_initiator_tag)
612
self.disable_initiator_tag = (gobject.timeout_add
613
(int(self.timeout
614
.total_seconds() * 1000),
615
self.disable))
616
# Also start a new checker *right now*.
617
self.start_checker()
618
619
437
def checker_callback(self, pid, condition, command):
620
438
"""The checker has completed, so take appropriate actions."""
621
439
self.checker_callback_tag = None
622
440
self.checker = None
623
441
if os.WIFEXITED(condition):
624
self.last_checker_status = os.WEXITSTATUS(condition)
625
if self.last_checker_status == 0:
442
exitstatus = os.WEXITSTATUS(condition)
443
if exitstatus == 0:
626
444
logger.info("Checker for %(name)s succeeded",
627
445
vars(self))
628
446
self.checked_ok()
630
448
logger.info("Checker for %(name)s failed",
631
449
vars(self))
632
450
else:
633
self.last_checker_status = -1
634
451
logger.warning("Checker for %(name)s crashed?",
635
452
vars(self))
636
453
637
def checked_ok(self):
638
"""Assert that the client has been seen, alive and well."""
639
self.last_checked_ok = datetime.datetime.utcnow()
640
self.last_checker_status = 0
641
self.bump_timeout()
642
643
def bump_timeout(self, timeout=None):
644
"""Bump up the timeout for this client."""
454
def checked_ok(self, timeout=None):
455
"""Bump up the timeout for this client.
456
457
This should only be called when the client has been seen,
458
alive and well.
459
"""
645
460
if timeout is None:
646
461
timeout = self.timeout
647
if self.disable_initiator_tag is not None:
648
gobject.source_remove(self.disable_initiator_tag)
649
self.disable_initiator_tag = None
650
if getattr(self, "enabled", False):
651
self.disable_initiator_tag = (gobject.timeout_add
652
(int(timeout.total_seconds()
653
* 1000), self.disable))
654
self.expires = datetime.datetime.utcnow() + timeout
462
self.last_checked_ok = datetime.datetime.utcnow()
463
gobject.source_remove(self.disable_initiator_tag)
464
self.expires = datetime.datetime.utcnow() + timeout
465
self.disable_initiator_tag = (gobject.timeout_add
466
(self._timedelta_to_milliseconds(timeout),
467
self.disable))
655
468
656
469
def need_approval(self):
657
470
self.last_approval_request = datetime.datetime.utcnow()
662
475
If a checker already exists, leave it running and do
663
476
nothing."""
664
477
# The reason for not killing a running checker is that if we
665
# did that, and if a checker (for some reason) started running
666
# slowly and taking more than 'interval' time, then the client
667
# would inevitably timeout, since no checker would get a
668
# chance to run to completion. If we instead leave running
478
# did that, then if a checker (for some reason) started
479
# running slowly and taking more than 'interval' time, the
480
# client would inevitably timeout, since no checker would get
481
# a chance to run to completion. If we instead leave running
669
482
# checkers alone, the checker would have to take more time
670
483
# than 'timeout' for the client to be disabled, which is as it
671
484
# should be.
673
486
# If a checker exists, make sure it is not a zombie
674
487
try:
675
488
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
676
except AttributeError:
677
pass
678
except OSError as error:
679
if error.errno != errno.ECHILD:
680
raise
489
except (AttributeError, OSError) as error:
490
if (isinstance(error, OSError)
491
and error.errno != errno.ECHILD):
492
raise error
681
493
else:
682
494
if pid:
683
495
logger.warning("Checker was a zombie")
686
498
self.current_checker_command)
687
499
# Start a new checker if needed
688
500
if self.checker is None:
689
# Escape attributes for the shell
690
escaped_attrs = { attr:
691
re.escape(str(getattr(self, attr)))
692
for attr in self.runtime_expansions }
693
501
try:
694
command = self.checker_command % escaped_attrs
695
except TypeError as error:
696
logger.error('Could not format string "%s"',
697
self.checker_command, exc_info=error)
698
return True # Try again later
502
# In case checker_command has exactly one % operator
503
command = self.checker_command % self.host
504
except TypeError:
505
# Escape attributes for the shell
506
escaped_attrs = dict(
507
(attr,
508
re.escape(unicode(str(getattr(self, attr, "")),
509
errors=
510
'replace')))
511
for attr in
512
self.runtime_expansions)
513
514
try:
515
command = self.checker_command % escaped_attrs
516
except TypeError as error:
517
logger.error('Could not format string "%s":'
518
' %s', self.checker_command, error)
519
return True # Try again later
699
520
self.current_checker_command = command
700
521
try:
701
522
logger.info("Starting checker %r for %s",
704
525
# in normal mode, that is already done by daemon(),
705
526
# and in debug mode we don't want to. (Stdin is
706
527
# always replaced by /dev/null.)
707
# The exception is when not debugging but nevertheless
708
# running in the foreground; use the previously
709
# created wnull.
710
popen_args = {}
711
if (not self.server_settings["debug"]
712
and self.server_settings["foreground"]):
713
popen_args.update({"stdout": wnull,
714
"stderr": wnull })
715
528
self.checker = subprocess.Popen(command,
716
529
close_fds=True,
717
shell=True, cwd="/",
718
**popen_args)
719
except OSError as error:
720
logger.error("Failed to start subprocess",
721
exc_info=error)
722
return True
723
self.checker_callback_tag = (gobject.child_watch_add
724
(self.checker.pid,
725
self.checker_callback,
726
data=command))
727
# The checker may have completed before the gobject
728
# watch was added. Check for this.
729
try:
530
shell=True, cwd="/")
531
self.checker_callback_tag = (gobject.child_watch_add
532
(self.checker.pid,
533
self.checker_callback,
534
data=command))
535
# The checker may have completed before the gobject
536
# watch was added. Check for this.
730
537
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
538
if pid:
539
gobject.source_remove(self.checker_callback_tag)
540
self.checker_callback(pid, status, command)
731
541
except OSError as error:
732
if error.errno == errno.ECHILD:
733
# This should never happen
734
logger.error("Child process vanished",
735
exc_info=error)
736
return True
737
raise
738
if pid:
739
gobject.source_remove(self.checker_callback_tag)
740
self.checker_callback(pid, status, command)
542
logger.error("Failed to start subprocess: %s",
543
error)
741
544
# Re-run this periodically if run by gobject.timeout_add
742
545
return True
743
546
750
553
return
751
554
logger.debug("Stopping checker for %(name)s", vars(self))
752
555
try:
753
self.checker.terminate()
556
os.kill(self.checker.pid, signal.SIGTERM)
754
557
#time.sleep(0.5)
755
558
#if self.checker.poll() is None:
756
# self.checker.kill()
559
# os.kill(self.checker.pid, signal.SIGKILL)
757
560
except OSError as error:
758
561
if error.errno != errno.ESRCH: # No such process
759
562
raise
760
563
self.checker = None
761
564
762
763
565
def dbus_service_property(dbus_interface, signature="v",
764
566
access="readwrite", byte_arrays=False):
765
567
"""Decorators for marking methods of a DBusObjectWithProperties to
776
578
# "Set" method, so we fail early here:
777
579
if byte_arrays and signature != "ay":
778
580
raise ValueError("Byte arrays not supported for non-'ay'"
779
" signature {!r}".format(signature))
581
" signature %r" % signature)
780
582
def decorator(func):
781
583
func._dbus_is_property = True
782
584
func._dbus_interface = dbus_interface
790
592
return decorator
791
593
792
594
793
def dbus_interface_annotations(dbus_interface):
794
"""Decorator for marking functions returning interface annotations
795
796
Usage:
797
798
@dbus_interface_annotations("org.example.Interface")
799
def _foo(self): # Function name does not matter
800
return {"org.freedesktop.DBus.Deprecated": "true",
801
"org.freedesktop.DBus.Property.EmitsChangedSignal":
802
"false"}
803
"""
804
def decorator(func):
805
func._dbus_is_interface = True
806
func._dbus_interface = dbus_interface
807
func._dbus_name = dbus_interface
808
return func
809
return decorator
810
811
812
def dbus_annotations(annotations):
813
"""Decorator to annotate D-Bus methods, signals or properties
814
Usage:
815
816
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
817
"org.freedesktop.DBus.Property."
818
"EmitsChangedSignal": "false"})
819
@dbus_service_property("org.example.Interface", signature="b",
820
access="r")
821
def Property_dbus_property(self):
822
return dbus.Boolean(False)
823
"""
824
def decorator(func):
825
func._dbus_annotations = annotations
826
return func
827
return decorator
828
829
830
595
class DBusPropertyException(dbus.exceptions.DBusException):
831
596
"""A base class for D-Bus property-related exceptions
832
597
"""
833
pass
598
def __unicode__(self):
599
return unicode(str(self))
600
834
601
835
602
class DBusPropertyAccessException(DBusPropertyException):
836
603
"""A property's access permissions disallows an operation.
846
613
847
614
class DBusObjectWithProperties(dbus.service.Object):
848
615
"""A D-Bus object with properties.
849
616
850
617
Classes inheriting from this can use the dbus_service_property
851
618
decorator to expose methods as D-Bus properties. It exposes the
852
619
standard Get(), Set(), and GetAll() methods on the D-Bus.
853
620
"""
854
621
855
622
@staticmethod
856
def _is_dbus_thing(thing):
857
"""Returns a function testing if an attribute is a D-Bus thing
858
859
If called like _is_dbus_thing("method") it returns a function
860
suitable for use as predicate to inspect.getmembers().
861
"""
862
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
863
False)
623
def _is_dbus_property(obj):
624
return getattr(obj, "_dbus_is_property", False)
864
625
865
def _get_all_dbus_things(self, thing):
626
def _get_all_dbus_properties(self):
866
627
"""Returns a generator of (name, attribute) pairs
867
628
"""
868
return ((getattr(athing.__get__(self), "_dbus_name",
869
name),
870
athing.__get__(self))
871
for cls in self.__class__.__mro__
872
for name, athing in
873
inspect.getmembers(cls,
874
self._is_dbus_thing(thing)))
629
return ((prop._dbus_name, prop)
630
for name, prop in
631
inspect.getmembers(self, self._is_dbus_property))
875
632
876
633
def _get_dbus_property(self, interface_name, property_name):
877
634
"""Returns a bound method if one exists which is a D-Bus
878
635
property with the specified name and interface.
879
636
"""
880
for cls in self.__class__.__mro__:
881
for name, value in (inspect.getmembers
882
(cls,
883
self._is_dbus_thing("property"))):
884
if (value._dbus_name == property_name
885
and value._dbus_interface == interface_name):
886
return value.__get__(self)
887
637
for name in (property_name,
638
property_name + "_dbus_property"):
639
prop = getattr(self, name, None)
640
if (prop is None
641
or not self._is_dbus_property(prop)
642
or prop._dbus_name != property_name
643
or (interface_name and prop._dbus_interface
644
and interface_name != prop._dbus_interface)):
645
continue
646
return prop
888
647
# No such property
889
648
raise DBusPropertyNotFound(self.dbus_object_path + ":"
890
649
+ interface_name + "."
914
673
# The byte_arrays option is not supported yet on
915
674
# signatures other than "ay".
916
675
if prop._dbus_signature != "ay":
917
raise ValueError("Byte arrays not supported for non-"
918
"'ay' signature {!r}"
919
.format(prop._dbus_signature))
920
value = dbus.ByteArray(b''.join(chr(byte)
921
for byte in value))
676
raise ValueError
677
value = dbus.ByteArray(''.join(unichr(byte)
678
for byte in value))
922
679
prop(value)
923
680
924
681
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
926
683
def GetAll(self, interface_name):
927
684
"""Standard D-Bus property GetAll() method, see D-Bus
928
685
standard.
929
686
930
687
Note: Will not include properties with access="write".
931
688
"""
932
properties = {}
933
for name, prop in self._get_all_dbus_things("property"):
689
all = {}
690
for name, prop in self._get_all_dbus_properties():
934
691
if (interface_name
935
692
and interface_name != prop._dbus_interface):
936
693
# Interface non-empty but did not match
940
697
continue
941
698
value = prop()
942
699
if not hasattr(value, "variant_level"):
943
properties[name] = value
700
all[name] = value
944
701
continue
945
properties[name] = type(value)(value, variant_level=
946
value.variant_level+1)
947
return dbus.Dictionary(properties, signature="sv")
948
949
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
950
def PropertiesChanged(self, interface_name, changed_properties,
951
invalidated_properties):
952
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
953
standard.
954
"""
955
pass
702
all[name] = type(value)(value, variant_level=
703
value.variant_level+1)
704
return dbus.Dictionary(all, signature="sv")
956
705
957
706
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
958
707
out_signature="s",
959
708
path_keyword='object_path',
960
709
connection_keyword='connection')
961
710
def Introspect(self, object_path, connection):
962
"""Overloading of standard D-Bus method.
963
964
Inserts property tags and interface annotation tags.
711
"""Standard D-Bus method, overloaded to insert property tags.
965
712
"""
966
713
xmlstring = dbus.service.Object.Introspect(self, object_path,
967
714
connection)
974
721
e.setAttribute("access", prop._dbus_access)
975
722
return e
976
723
for if_tag in document.getElementsByTagName("interface"):
977
# Add property tags
978
724
for tag in (make_tag(document, name, prop)
979
725
for name, prop
980
in self._get_all_dbus_things("property")
726
in self._get_all_dbus_properties()
981
727
if prop._dbus_interface
982
728
== if_tag.getAttribute("name")):
983
729
if_tag.appendChild(tag)
984
# Add annotation tags
985
for typ in ("method", "signal", "property"):
986
for tag in if_tag.getElementsByTagName(typ):
987
annots = dict()
988
for name, prop in (self.
989
_get_all_dbus_things(typ)):
990
if (name == tag.getAttribute("name")
991
and prop._dbus_interface
992
== if_tag.getAttribute("name")):
993
annots.update(getattr
994
(prop,
995
"_dbus_annotations",
996
{}))
997
for name, value in annots.items():
998
ann_tag = document.createElement(
999
"annotation")
1000
ann_tag.setAttribute("name", name)
1001
ann_tag.setAttribute("value", value)
1002
tag.appendChild(ann_tag)
1003
# Add interface annotation tags
1004
for annotation, value in dict(
1005
itertools.chain.from_iterable(
1006
annotations().items()
1007
for name, annotations in
1008
self._get_all_dbus_things("interface")
1009
if name == if_tag.getAttribute("name")
1010
)).items():
1011
ann_tag = document.createElement("annotation")
1012
ann_tag.setAttribute("name", annotation)
1013
ann_tag.setAttribute("value", value)
1014
if_tag.appendChild(ann_tag)
1015
730
# Add the names to the return values for the
1016
731
# "org.freedesktop.DBus.Properties" methods
1017
732
if (if_tag.getAttribute("name")
1032
747
except (AttributeError, xml.dom.DOMException,
1033
748
xml.parsers.expat.ExpatError) as error:
1034
749
logger.error("Failed to override Introspection method",
1035
exc_info=error)
750
error)
1036
751
return xmlstring
1037
752
1038
753
1039
def datetime_to_dbus(dt, variant_level=0):
1040
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1041
if dt is None:
1042
return dbus.String("", variant_level = variant_level)
1043
return dbus.String(dt.isoformat(),
1044
variant_level=variant_level)
1045
1046
1047
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1048
"""A class decorator; applied to a subclass of
1049
dbus.service.Object, it will add alternate D-Bus attributes with
1050
interface names according to the "alt_interface_names" mapping.
1051
Usage:
1052
1053
@alternate_dbus_interfaces({"org.example.Interface":
1054
"net.example.AlternateInterface"})
1055
class SampleDBusObject(dbus.service.Object):
1056
@dbus.service.method("org.example.Interface")
1057
def SampleDBusMethod():
1058
pass
1059
1060
The above "SampleDBusMethod" on "SampleDBusObject" will be
1061
reachable via two interfaces: "org.example.Interface" and
1062
"net.example.AlternateInterface", the latter of which will have
1063
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1064
"true", unless "deprecate" is passed with a False value.
1065
1066
This works for methods and signals, and also for D-Bus properties
1067
(from DBusObjectWithProperties) and interfaces (from the
1068
dbus_interface_annotations decorator).
1069
"""
1070
def wrapper(cls):
1071
for orig_interface_name, alt_interface_name in (
1072
alt_interface_names.items()):
1073
attr = {}
1074
interface_names = set()
1075
# Go though all attributes of the class
1076
for attrname, attribute in inspect.getmembers(cls):
1077
# Ignore non-D-Bus attributes, and D-Bus attributes
1078
# with the wrong interface name
1079
if (not hasattr(attribute, "_dbus_interface")
1080
or not attribute._dbus_interface
1081
.startswith(orig_interface_name)):
1082
continue
1083
# Create an alternate D-Bus interface name based on
1084
# the current name
1085
alt_interface = (attribute._dbus_interface
1086
.replace(orig_interface_name,
1087
alt_interface_name))
1088
interface_names.add(alt_interface)
1089
# Is this a D-Bus signal?
1090
if getattr(attribute, "_dbus_is_signal", False):
1091
# Extract the original non-method undecorated
1092
# function by black magic
1093
nonmethod_func = (dict(
1094
zip(attribute.func_code.co_freevars,
1095
attribute.__closure__))["func"]
1096
.cell_contents)
1097
# Create a new, but exactly alike, function
1098
# object, and decorate it to be a new D-Bus signal
1099
# with the alternate D-Bus interface name
1100
new_function = (dbus.service.signal
1101
(alt_interface,
1102
attribute._dbus_signature)
1103
(types.FunctionType(
1104
nonmethod_func.func_code,
1105
nonmethod_func.func_globals,
1106
nonmethod_func.func_name,
1107
nonmethod_func.func_defaults,
1108
nonmethod_func.func_closure)))
1109
# Copy annotations, if any
1110
try:
1111
new_function._dbus_annotations = (
1112
dict(attribute._dbus_annotations))
1113
except AttributeError:
1114
pass
1115
# Define a creator of a function to call both the
1116
# original and alternate functions, so both the
1117
# original and alternate signals gets sent when
1118
# the function is called
1119
def fixscope(func1, func2):
1120
"""This function is a scope container to pass
1121
func1 and func2 to the "call_both" function
1122
outside of its arguments"""
1123
def call_both(*args, **kwargs):
1124
"""This function will emit two D-Bus
1125
signals by calling func1 and func2"""
1126
func1(*args, **kwargs)
1127
func2(*args, **kwargs)
1128
return call_both
1129
# Create the "call_both" function and add it to
1130
# the class
1131
attr[attrname] = fixscope(attribute, new_function)
1132
# Is this a D-Bus method?
1133
elif getattr(attribute, "_dbus_is_method", False):
1134
# Create a new, but exactly alike, function
1135
# object. Decorate it to be a new D-Bus method
1136
# with the alternate D-Bus interface name. Add it
1137
# to the class.
1138
attr[attrname] = (dbus.service.method
1139
(alt_interface,
1140
attribute._dbus_in_signature,
1141
attribute._dbus_out_signature)
1142
(types.FunctionType
1143
(attribute.func_code,
1144
attribute.func_globals,
1145
attribute.func_name,
1146
attribute.func_defaults,
1147
attribute.func_closure)))
1148
# Copy annotations, if any
1149
try:
1150
attr[attrname]._dbus_annotations = (
1151
dict(attribute._dbus_annotations))
1152
except AttributeError:
1153
pass
1154
# Is this a D-Bus property?
1155
elif getattr(attribute, "_dbus_is_property", False):
1156
# Create a new, but exactly alike, function
1157
# object, and decorate it to be a new D-Bus
1158
# property with the alternate D-Bus interface
1159
# name. Add it to the class.
1160
attr[attrname] = (dbus_service_property
1161
(alt_interface,
1162
attribute._dbus_signature,
1163
attribute._dbus_access,
1164
attribute
1165
._dbus_get_args_options
1166
["byte_arrays"])
1167
(types.FunctionType
1168
(attribute.func_code,
1169
attribute.func_globals,
1170
attribute.func_name,
1171
attribute.func_defaults,
1172
attribute.func_closure)))
1173
# Copy annotations, if any
1174
try:
1175
attr[attrname]._dbus_annotations = (
1176
dict(attribute._dbus_annotations))
1177
except AttributeError:
1178
pass
1179
# Is this a D-Bus interface?
1180
elif getattr(attribute, "_dbus_is_interface", False):
1181
# Create a new, but exactly alike, function
1182
# object. Decorate it to be a new D-Bus interface
1183
# with the alternate D-Bus interface name. Add it
1184
# to the class.
1185
attr[attrname] = (dbus_interface_annotations
1186
(alt_interface)
1187
(types.FunctionType
1188
(attribute.func_code,
1189
attribute.func_globals,
1190
attribute.func_name,
1191
attribute.func_defaults,
1192
attribute.func_closure)))
1193
if deprecate:
1194
# Deprecate all alternate interfaces
1195
iname="_AlternateDBusNames_interface_annotation{}"
1196
for interface_name in interface_names:
1197
@dbus_interface_annotations(interface_name)
1198
def func(self):
1199
return { "org.freedesktop.DBus.Deprecated":
1200
"true" }
1201
# Find an unused name
1202
for aname in (iname.format(i)
1203
for i in itertools.count()):
1204
if aname not in attr:
1205
attr[aname] = func
1206
break
1207
if interface_names:
1208
# Replace the class with a new subclass of it with
1209
# methods, signals, etc. as created above.
1210
cls = type(b"{}Alternate".format(cls.__name__),
1211
(cls,), attr)
1212
return cls
1213
return wrapper
1214
1215
1216
@alternate_dbus_interfaces({"se.recompile.Mandos":
1217
"se.bsnet.fukt.Mandos"})
1218
754
class ClientDBus(Client, DBusObjectWithProperties):
1219
755
"""A Client class using D-Bus
1220
756
1226
762
runtime_expansions = (Client.runtime_expansions
1227
763
+ ("dbus_object_path",))
1228
764
1229
_interface = "se.recompile.Mandos.Client"
1230
1231
765
# dbus.service.Object doesn't use super(), so we can't either.
1232
766
1233
767
def __init__(self, bus = None, *args, **kwargs):
768
self._approvals_pending = 0
1234
769
self.bus = bus
1235
770
Client.__init__(self, *args, **kwargs)
1236
771
# Only now, when this client is initialized, can it show up on
1237
772
# the D-Bus
1238
client_object_name = str(self.name).translate(
773
client_object_name = unicode(self.name).translate(
1239
774
{ord("."): ord("_"),
1240
775
ord("-"): ord("_")})
1241
776
self.dbus_object_path = (dbus.ObjectPath
1242
777
("/clients/" + client_object_name))
1243
778
DBusObjectWithProperties.__init__(self, self.bus,
1244
779
self.dbus_object_path)
1245
1246
def notifychangeproperty(transform_func,
1247
dbus_name, type_func=lambda x: x,
1248
variant_level=1, invalidate_only=False,
1249
_interface=_interface):
1250
""" Modify a variable so that it's a property which announces
1251
its changes to DBus.
1252
1253
transform_fun: Function that takes a value and a variant_level
1254
and transforms it to a D-Bus type.
1255
dbus_name: D-Bus name of the variable
1256
type_func: Function that transform the value before sending it
1257
to the D-Bus. Default: no transform
1258
variant_level: D-Bus variant level. Default: 1
1259
"""
1260
attrname = "_{}".format(dbus_name)
1261
def setter(self, value):
1262
if hasattr(self, "dbus_object_path"):
1263
if (not hasattr(self, attrname) or
1264
type_func(getattr(self, attrname, None))
1265
!= type_func(value)):
1266
if invalidate_only:
1267
self.PropertiesChanged(_interface,
1268
dbus.Dictionary(),
1269
dbus.Array
1270
((dbus_name,)))
1271
else:
1272
dbus_value = transform_func(type_func(value),
1273
variant_level
1274
=variant_level)
1275
self.PropertyChanged(dbus.String(dbus_name),
1276
dbus_value)
1277
self.PropertiesChanged(_interface,
1278
dbus.Dictionary({
1279
dbus.String(dbus_name):
1280
dbus_value }), dbus.Array())
1281
setattr(self, attrname, value)
1282
1283
return property(lambda self: getattr(self, attrname), setter)
1284
1285
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1286
approvals_pending = notifychangeproperty(dbus.Boolean,
1287
"ApprovalPending",
1288
type_func = bool)
1289
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1290
last_enabled = notifychangeproperty(datetime_to_dbus,
1291
"LastEnabled")
1292
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1293
type_func = lambda checker:
1294
checker is not None)
1295
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1296
"LastCheckedOK")
1297
last_checker_status = notifychangeproperty(dbus.Int16,
1298
"LastCheckerStatus")
1299
last_approval_request = notifychangeproperty(
1300
datetime_to_dbus, "LastApprovalRequest")
1301
approved_by_default = notifychangeproperty(dbus.Boolean,
1302
"ApprovedByDefault")
1303
approval_delay = notifychangeproperty(dbus.UInt64,
1304
"ApprovalDelay",
1305
type_func =
1306
lambda td: td.total_seconds()
1307
* 1000)
1308
approval_duration = notifychangeproperty(
1309
dbus.UInt64, "ApprovalDuration",
1310
type_func = lambda td: td.total_seconds() * 1000)
1311
host = notifychangeproperty(dbus.String, "Host")
1312
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1313
type_func = lambda td:
1314
td.total_seconds() * 1000)
1315
extended_timeout = notifychangeproperty(
1316
dbus.UInt64, "ExtendedTimeout",
1317
type_func = lambda td: td.total_seconds() * 1000)
1318
interval = notifychangeproperty(dbus.UInt64,
1319
"Interval",
1320
type_func =
1321
lambda td: td.total_seconds()
1322
* 1000)
1323
checker_command = notifychangeproperty(dbus.String, "Checker")
1324
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1325
invalidate_only=True)
1326
1327
del notifychangeproperty
780
def _set_expires(self, value):
781
old_value = getattr(self, "_expires", None)
782
self._expires = value
783
if hasattr(self, "dbus_object_path") and old_value != value:
784
dbus_time = (self._datetime_to_dbus(self._expires,
785
variant_level=1))
786
self.PropertyChanged(dbus.String("Expires"),
787
dbus_time)
788
expires = property(lambda self: self._expires, _set_expires)
789
del _set_expires
790
791
def _get_approvals_pending(self):
792
return self._approvals_pending
793
def _set_approvals_pending(self, value):
794
old_value = self._approvals_pending
795
self._approvals_pending = value
796
bval = bool(value)
797
if (hasattr(self, "dbus_object_path")
798
and bval is not bool(old_value)):
799
dbus_bool = dbus.Boolean(bval, variant_level=1)
800
self.PropertyChanged(dbus.String("ApprovalPending"),
801
dbus_bool)
802
803
approvals_pending = property(_get_approvals_pending,
804
_set_approvals_pending)
805
del _get_approvals_pending, _set_approvals_pending
806
807
@staticmethod
808
def _datetime_to_dbus(dt, variant_level=0):
809
"""Convert a UTC datetime.datetime() to a D-Bus type."""
810
if dt is None:
811
return dbus.String("", variant_level = variant_level)
812
return dbus.String(dt.isoformat(),
813
variant_level=variant_level)
814
815
def enable(self):
816
oldstate = getattr(self, "enabled", False)
817
r = Client.enable(self)
818
if oldstate != self.enabled:
819
# Emit D-Bus signals
820
self.PropertyChanged(dbus.String("Enabled"),
821
dbus.Boolean(True, variant_level=1))
822
self.PropertyChanged(
823
dbus.String("LastEnabled"),
824
self._datetime_to_dbus(self.last_enabled,
825
variant_level=1))
826
return r
827
828
def disable(self, quiet = False):
829
oldstate = getattr(self, "enabled", False)
830
r = Client.disable(self, quiet=quiet)
831
if not quiet and oldstate != self.enabled:
832
# Emit D-Bus signal
833
self.PropertyChanged(dbus.String("Enabled"),
834
dbus.Boolean(False, variant_level=1))
835
return r
1328
836
1329
837
def __del__(self, *args, **kwargs):
1330
838
try:
1339
847
*args, **kwargs):
1340
848
self.checker_callback_tag = None
1341
849
self.checker = None
850
# Emit D-Bus signal
851
self.PropertyChanged(dbus.String("CheckerRunning"),
852
dbus.Boolean(False, variant_level=1))
1342
853
if os.WIFEXITED(condition):
1343
854
exitstatus = os.WEXITSTATUS(condition)
1344
855
# Emit D-Bus signal
1354
865
return Client.checker_callback(self, pid, condition, command,
1355
866
*args, **kwargs)
1356
867
868
def checked_ok(self, *args, **kwargs):
869
Client.checked_ok(self, *args, **kwargs)
870
# Emit D-Bus signal
871
self.PropertyChanged(
872
dbus.String("LastCheckedOK"),
873
(self._datetime_to_dbus(self.last_checked_ok,
874
variant_level=1)))
875
876
def need_approval(self, *args, **kwargs):
877
r = Client.need_approval(self, *args, **kwargs)
878
# Emit D-Bus signal
879
self.PropertyChanged(
880
dbus.String("LastApprovalRequest"),
881
(self._datetime_to_dbus(self.last_approval_request,
882
variant_level=1)))
883
return r
884
1357
885
def start_checker(self, *args, **kwargs):
1358
old_checker_pid = getattr(self.checker, "pid", None)
886
old_checker = self.checker
887
if self.checker is not None:
888
old_checker_pid = self.checker.pid
889
else:
890
old_checker_pid = None
1359
891
r = Client.start_checker(self, *args, **kwargs)
1360
892
# Only if new checker process was started
1361
893
if (self.checker is not None
1362
894
and old_checker_pid != self.checker.pid):
1363
895
# Emit D-Bus signal
1364
896
self.CheckerStarted(self.current_checker_command)
897
self.PropertyChanged(
898
dbus.String("CheckerRunning"),
899
dbus.Boolean(True, variant_level=1))
1365
900
return r
1366
901
902
def stop_checker(self, *args, **kwargs):
903
old_checker = getattr(self, "checker", None)
904
r = Client.stop_checker(self, *args, **kwargs)
905
if (old_checker is not None
906
and getattr(self, "checker", None) is None):
907
self.PropertyChanged(dbus.String("CheckerRunning"),
908
dbus.Boolean(False, variant_level=1))
909
return r
910
1367
911
def _reset_approved(self):
1368
self.approved = None
912
self._approved = None
1369
913
return False
1370
914
1371
915
def approve(self, value=True):
1372
self.approved = value
1373
gobject.timeout_add(int(self.approval_duration.total_seconds()
1374
* 1000), self._reset_approved)
1375
916
self.send_changedstate()
917
self._approved = value
918
gobject.timeout_add(self._timedelta_to_milliseconds
919
(self.approval_duration),
920
self._reset_approved)
921
1376
922
1377
923
## D-Bus methods, signals & properties
1378
1379
## Interfaces
924
_interface = "se.bsnet.fukt.Mandos.Client"
1380
925
1381
926
## Signals
1382
927
1393
938
pass
1394
939
1395
940
# PropertyChanged - signal
1396
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1397
941
@dbus.service.signal(_interface, signature="sv")
1398
942
def PropertyChanged(self, property, value):
1399
943
"D-Bus signal"
1468
1012
def ApprovedByDefault_dbus_property(self, value=None):
1469
1013
if value is None: # get
1470
1014
return dbus.Boolean(self.approved_by_default)
1015
old_value = self.approved_by_default
1471
1016
self.approved_by_default = bool(value)
1017
# Emit D-Bus signal
1018
if old_value != self.approved_by_default:
1019
self.PropertyChanged(dbus.String("ApprovedByDefault"),
1020
dbus.Boolean(value, variant_level=1))
1472
1021
1473
1022
# ApprovalDelay - property
1474
1023
@dbus_service_property(_interface, signature="t",
1475
1024
access="readwrite")
1476
1025
def ApprovalDelay_dbus_property(self, value=None):
1477
1026
if value is None: # get
1478
return dbus.UInt64(self.approval_delay.total_seconds()
1479
* 1000)
1027
return dbus.UInt64(self.approval_delay_milliseconds())
1028
old_value = self.approval_delay
1480
1029
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1030
# Emit D-Bus signal
1031
if old_value != self.approval_delay:
1032
self.PropertyChanged(dbus.String("ApprovalDelay"),
1033
dbus.UInt64(value, variant_level=1))
1481
1034
1482
1035
# ApprovalDuration - property
1483
1036
@dbus_service_property(_interface, signature="t",
1484
1037
access="readwrite")
1485
1038
def ApprovalDuration_dbus_property(self, value=None):
1486
1039
if value is None: # get
1487
return dbus.UInt64(self.approval_duration.total_seconds()
1488
* 1000)
1040
return dbus.UInt64(self._timedelta_to_milliseconds(
1041
self.approval_duration))
1042
old_value = self.approval_duration
1489
1043
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1044
# Emit D-Bus signal
1045
if old_value != self.approval_duration:
1046
self.PropertyChanged(dbus.String("ApprovalDuration"),
1047
dbus.UInt64(value, variant_level=1))
1490
1048
1491
1049
# Name - property
1492
1050
@dbus_service_property(_interface, signature="s", access="read")
1504
1062
def Host_dbus_property(self, value=None):
1505
1063
if value is None: # get
1506
1064
return dbus.String(self.host)
1507
self.host = str(value)
1065
old_value = self.host
1066
self.host = value
1067
# Emit D-Bus signal
1068
if old_value != self.host:
1069
self.PropertyChanged(dbus.String("Host"),
1070
dbus.String(value, variant_level=1))
1508
1071
1509
1072
# Created - property
1510
1073
@dbus_service_property(_interface, signature="s", access="read")
1511
1074
def Created_dbus_property(self):
1512
return datetime_to_dbus(self.created)
1075
return dbus.String(self._datetime_to_dbus(self.created))
1513
1076
1514
1077
# LastEnabled - property
1515
1078
@dbus_service_property(_interface, signature="s", access="read")
1516
1079
def LastEnabled_dbus_property(self):
1517
return datetime_to_dbus(self.last_enabled)
1080
return self._datetime_to_dbus(self.last_enabled)
1518
1081
1519
1082
# Enabled - property
1520
1083
@dbus_service_property(_interface, signature="b",
1534
1097
if value is not None:
1535
1098
self.checked_ok()
1536
1099
return
1537
return datetime_to_dbus(self.last_checked_ok)
1538
1539
# LastCheckerStatus - property
1540
@dbus_service_property(_interface, signature="n",
1541
access="read")
1542
def LastCheckerStatus_dbus_property(self):
1543
return dbus.Int16(self.last_checker_status)
1100
return self._datetime_to_dbus(self.last_checked_ok)
1544
1101
1545
1102
# Expires - property
1546
1103
@dbus_service_property(_interface, signature="s", access="read")
1547
1104
def Expires_dbus_property(self):
1548
return datetime_to_dbus(self.expires)
1105
return self._datetime_to_dbus(self.expires)
1549
1106
1550
1107
# LastApprovalRequest - property
1551
1108
@dbus_service_property(_interface, signature="s", access="read")
1552
1109
def LastApprovalRequest_dbus_property(self):
1553
return datetime_to_dbus(self.last_approval_request)
1110
return self._datetime_to_dbus(self.last_approval_request)
1554
1111
1555
1112
# Timeout - property
1556
1113
@dbus_service_property(_interface, signature="t",
1557
1114
access="readwrite")
1558
1115
def Timeout_dbus_property(self, value=None):
1559
1116
if value is None: # get
1560
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1561
old_timeout = self.timeout
1117
return dbus.UInt64(self.timeout_milliseconds())
1118
old_value = self.timeout
1562
1119
self.timeout = datetime.timedelta(0, 0, 0, value)
1563
# Reschedule disabling
1564
if self.enabled:
1565
now = datetime.datetime.utcnow()
1566
self.expires += self.timeout - old_timeout
1567
if self.expires <= now:
1568
# The timeout has passed
1569
self.disable()
1570
else:
1571
if (getattr(self, "disable_initiator_tag", None)
1572
is None):
1573
return
1574
gobject.source_remove(self.disable_initiator_tag)
1575
self.disable_initiator_tag = (
1576
gobject.timeout_add(
1577
int((self.expires - now).total_seconds()
1578
* 1000), self.disable))
1579
1120
# Emit D-Bus signal
1121
if old_value != self.timeout:
1122
self.PropertyChanged(dbus.String("Timeout"),
1123
dbus.UInt64(value, variant_level=1))
1124
if getattr(self, "disable_initiator_tag", None) is None:
1125
return
1126
# Reschedule timeout
1127
gobject.source_remove(self.disable_initiator_tag)
1128
self.disable_initiator_tag = None
1129
self.expires = None
1130
time_to_die = (self.
1131
_timedelta_to_milliseconds((self
1132
.last_checked_ok
1133
+ self.timeout)
1134
- datetime.datetime
1135
.utcnow()))
1136
if time_to_die <= 0:
1137
# The timeout has passed
1138
self.disable()
1139
else:
1140
self.expires = (datetime.datetime.utcnow()
1141
+ datetime.timedelta(milliseconds = time_to_die))
1142
self.disable_initiator_tag = (gobject.timeout_add
1143
(time_to_die, self.disable))
1144
1580
1145
# ExtendedTimeout - property
1581
1146
@dbus_service_property(_interface, signature="t",
1582
1147
access="readwrite")
1583
1148
def ExtendedTimeout_dbus_property(self, value=None):
1584
1149
if value is None: # get
1585
return dbus.UInt64(self.extended_timeout.total_seconds()
1586
* 1000)
1150
return dbus.UInt64(self.extended_timeout_milliseconds())
1151
old_value = self.extended_timeout
1587
1152
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1588
1153
# Emit D-Bus signal
1154
if old_value != self.extended_timeout:
1155
self.PropertyChanged(dbus.String("ExtendedTimeout"),
1156
dbus.UInt64(value, variant_level=1))
1157
1589
1158
# Interval - property
1590
1159
@dbus_service_property(_interface, signature="t",
1591
1160
access="readwrite")
1592
1161
def Interval_dbus_property(self, value=None):
1593
1162
if value is None: # get
1594
return dbus.UInt64(self.interval.total_seconds() * 1000)
1163
return dbus.UInt64(self.interval_milliseconds())
1164
old_value = self.interval
1595
1165
self.interval = datetime.timedelta(0, 0, 0, value)
1166
# Emit D-Bus signal
1167
if old_value != self.interval:
1168
self.PropertyChanged(dbus.String("Interval"),
1169
dbus.UInt64(value, variant_level=1))
1596
1170
if getattr(self, "checker_initiator_tag", None) is None:
1597
1171
return
1598
if self.enabled:
1599
# Reschedule checker run
1600
gobject.source_remove(self.checker_initiator_tag)
1601
self.checker_initiator_tag = (gobject.timeout_add
1602
(value, self.start_checker))
1603
self.start_checker() # Start one now, too
1604
1172
# Reschedule checker run
1173
gobject.source_remove(self.checker_initiator_tag)
1174
self.checker_initiator_tag = (gobject.timeout_add
1175
(value, self.start_checker))
1176
self.start_checker() # Start one now, too
1177
1605
1178
# Checker - property
1606
1179
@dbus_service_property(_interface, signature="s",
1607
1180
access="readwrite")
1608
1181
def Checker_dbus_property(self, value=None):
1609
1182
if value is None: # get
1610
1183
return dbus.String(self.checker_command)
1611
self.checker_command = str(value)
1184
old_value = self.checker_command
1185
self.checker_command = value
1186
# Emit D-Bus signal
1187
if old_value != self.checker_command:
1188
self.PropertyChanged(dbus.String("Checker"),
1189
dbus.String(self.checker_command,
1190
variant_level=1))
1612
1191
1613
1192
# CheckerRunning - property
1614
1193
@dbus_service_property(_interface, signature="b",
1630
1209
@dbus_service_property(_interface, signature="ay",
1631
1210
access="write", byte_arrays=True)
1632
1211
def Secret_dbus_property(self, value):
1633
self.secret = bytes(value)
1212
self.secret = str(value)
1634
1213
1635
1214
del _interface
1636
1215
1641
1220
self._pipe.send(('init', fpr, address))
1642
1221
if not self._pipe.recv():
1643
1222
raise KeyError()
1644
1223
1645
1224
def __getattribute__(self, name):
1646
if name == '_pipe':
1225
if(name == '_pipe'):
1647
1226
return super(ProxyClient, self).__getattribute__(name)
1648
1227
self._pipe.send(('getattr', name))
1649
1228
data = self._pipe.recv()
1654
1233
self._pipe.send(('funcall', name, args, kwargs))
1655
1234
return self._pipe.recv()[1]
1656
1235
return func
1657
1236
1658
1237
def __setattr__(self, name, value):
1659
if name == '_pipe':
1238
if(name == '_pipe'):
1660
1239
return super(ProxyClient, self).__setattr__(name, value)
1661
1240
self._pipe.send(('setattr', name, value))
1662
1241
1670
1249
def handle(self):
1671
1250
with contextlib.closing(self.server.child_pipe) as child_pipe:
1672
1251
logger.info("TCP connection from: %s",
1673
str(self.client_address))
1252
unicode(self.client_address))
1674
1253
logger.debug("Pipe FD: %d",
1675
1254
self.server.child_pipe.fileno())
1676
1255
1677
1256
session = (gnutls.connection
1678
1257
.ClientSession(self.request,
1679
1258
gnutls.connection
1680
1259
.X509Credentials()))
1681
1260
1682
1261
# Note: gnutls.connection.X509Credentials is really a
1683
1262
# generic GnuTLS certificate credentials object so long as
1684
1263
# no X.509 keys are added to it. Therefore, we can use it
1685
1264
# here despite using OpenPGP certificates.
1686
1265
1687
1266
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1688
1267
# "+AES-256-CBC", "+SHA1",
1689
1268
# "+COMP-NULL", "+CTYPE-OPENPGP",
1695
1274
(gnutls.library.functions
1696
1275
.gnutls_priority_set_direct(session._c_object,
1697
1276
priority, None))
1698
1277
1699
1278
# Start communication using the Mandos protocol
1700
1279
# Get protocol number
1701
1280
line = self.request.makefile().readline()
1702
1281
logger.debug("Protocol version: %r", line)
1703
1282
try:
1704
1283
if int(line.strip().split()[0]) > 1:
1705
raise RuntimeError(line)
1284
raise RuntimeError
1706
1285
except (ValueError, IndexError, RuntimeError) as error:
1707
1286
logger.error("Unknown protocol version: %s", error)
1708
1287
return
1709
1288
1710
1289
# Start GnuTLS connection
1711
1290
try:
1712
1291
session.handshake()
1716
1295
# established. Just abandon the request.
1717
1296
return
1718
1297
logger.debug("Handshake succeeded")
1719
1298
1720
1299
approval_required = False
1721
1300
try:
1722
1301
try:
1727
1306
logger.warning("Bad certificate: %s", error)
1728
1307
return
1729
1308
logger.debug("Fingerprint: %s", fpr)
1730
1309
1731
1310
try:
1732
1311
client = ProxyClient(child_pipe, fpr,
1733
1312
self.client_address)
1745
1324
client.name)
1746
1325
if self.server.use_dbus:
1747
1326
# Emit D-Bus signal
1748
client.Rejected("Disabled")
1327
client.Rejected("Disabled")
1749
1328
return
1750
1329
1751
if client.approved or not client.approval_delay:
1330
if client._approved or not client.approval_delay:
1752
1331
#We are approved or approval is disabled
1753
1332
break
1754
elif client.approved is None:
1333
elif client._approved is None:
1755
1334
logger.info("Client %s needs approval",
1756
1335
client.name)
1757
1336
if self.server.use_dbus:
1758
1337
# Emit D-Bus signal
1759
1338
client.NeedApproval(
1760
client.approval_delay.total_seconds()
1761
* 1000, client.approved_by_default)
1339
client.approval_delay_milliseconds(),
1340
client.approved_by_default)
1762
1341
else:
1763
1342
logger.warning("Client %s was not approved",
1764
1343
client.name)
1768
1347
return
1769
1348
1770
1349
#wait until timeout or approved
1350
#x = float(client._timedelta_to_milliseconds(delay))
1771
1351
time = datetime.datetime.now()
1772
1352
client.changedstate.acquire()
1773
client.changedstate.wait(delay.total_seconds())
1353
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1774
1354
client.changedstate.release()
1775
1355
time2 = datetime.datetime.now()
1776
1356
if (time2 - time) >= delay:
1792
1372
try:
1793
1373
sent = session.send(client.secret[sent_size:])
1794
1374
except gnutls.errors.GNUTLSError as error:
1795
logger.warning("gnutls send failed",
1796
exc_info=error)
1375
logger.warning("gnutls send failed")
1797
1376
return
1798
1377
logger.debug("Sent: %d, remaining: %d",
1799
1378
sent, len(client.secret)
1800
1379
- (sent_size + sent))
1801
1380
sent_size += sent
1802
1381
1803
1382
logger.info("Sending secret to %s", client.name)
1804
# bump the timeout using extended_timeout
1805
client.bump_timeout(client.extended_timeout)
1383
# bump the timeout as if seen
1384
client.checked_ok(client.extended_timeout)
1806
1385
if self.server.use_dbus:
1807
1386
# Emit D-Bus signal
1808
1387
client.GotSecret()
1813
1392
try:
1814
1393
session.bye()
1815
1394
except gnutls.errors.GNUTLSError as error:
1816
logger.warning("GnuTLS bye failed",
1817
exc_info=error)
1395
logger.warning("GnuTLS bye failed")
1818
1396
1819
1397
@staticmethod
1820
1398
def peer_certificate(session):
1876
1454
# Convert the buffer to a Python bytestring
1877
1455
fpr = ctypes.string_at(buf, buf_len.value)
1878
1456
# Convert the bytestring to hexadecimal notation
1879
hex_fpr = binascii.hexlify(fpr).upper()
1457
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1880
1458
return hex_fpr
1881
1459
1882
1460
1885
1463
def sub_process_main(self, request, address):
1886
1464
try:
1887
1465
self.finish_request(request, address)
1888
except Exception:
1466
except:
1889
1467
self.handle_error(request, address)
1890
1468
self.close_request(request)
1891
1469
1892
1470
def process_request(self, request, address):
1893
1471
"""Start a new process to process the request."""
1894
proc = multiprocessing.Process(target = self.sub_process_main,
1895
args = (request, address))
1896
proc.start()
1897
return proc
1898
1472
multiprocessing.Process(target = self.sub_process_main,
1473
args = (request, address)).start()
1899
1474
1900
1475
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1901
1476
""" adds a pipe to the MixIn """
1905
1480
This function creates a new pipe in self.pipe
1906
1481
"""
1907
1482
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1908
1909
proc = MultiprocessingMixIn.process_request(self, request,
1910
client_address)
1483
1484
super(MultiprocessingMixInWithPipe,
1485
self).process_request(request, client_address)
1911
1486
self.child_pipe.close()
1912
self.add_pipe(parent_pipe, proc)
1913
1914
def add_pipe(self, parent_pipe, proc):
1487
self.add_pipe(parent_pipe)
1488
1489
def add_pipe(self, parent_pipe):
1915
1490
"""Dummy function; override as necessary"""
1916
raise NotImplementedError()
1917
1491
raise NotImplementedError
1918
1492
1919
1493
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1920
1494
socketserver.TCPServer, object):
1926
1500
use_ipv6: Boolean; to use IPv6 or not
1927
1501
"""
1928
1502
def __init__(self, server_address, RequestHandlerClass,
1929
interface=None, use_ipv6=True, socketfd=None):
1930
"""If socketfd is set, use that file descriptor instead of
1931
creating a new one with socket.socket().
1932
"""
1503
interface=None, use_ipv6=True):
1933
1504
self.interface = interface
1934
1505
if use_ipv6:
1935
1506
self.address_family = socket.AF_INET6
1936
if socketfd is not None:
1937
# Save the file descriptor
1938
self.socketfd = socketfd
1939
# Save the original socket.socket() function
1940
self.socket_socket = socket.socket
1941
# To implement --socket, we monkey patch socket.socket.
1942
#
1943
# (When socketserver.TCPServer is a new-style class, we
1944
# could make self.socket into a property instead of monkey
1945
# patching socket.socket.)
1946
#
1947
# Create a one-time-only replacement for socket.socket()
1948
@functools.wraps(socket.socket)
1949
def socket_wrapper(*args, **kwargs):
1950
# Restore original function so subsequent calls are
1951
# not affected.
1952
socket.socket = self.socket_socket
1953
del self.socket_socket
1954
# This time only, return a new socket object from the
1955
# saved file descriptor.
1956
return socket.fromfd(self.socketfd, *args, **kwargs)
1957
# Replace socket.socket() function with wrapper
1958
socket.socket = socket_wrapper
1959
# The socketserver.TCPServer.__init__ will call
1960
# socket.socket(), which might be our replacement,
1961
# socket_wrapper(), if socketfd was set.
1962
1507
socketserver.TCPServer.__init__(self, server_address,
1963
1508
RequestHandlerClass)
1964
1965
1509
def server_bind(self):
1966
1510
"""This overrides the normal server_bind() function
1967
1511
to bind to an interface if one was specified, and also NOT to
1975
1519
try:
1976
1520
self.socket.setsockopt(socket.SOL_SOCKET,
1977
1521
SO_BINDTODEVICE,
1978
(self.interface + "\0")
1979
.encode("utf-8"))
1522
str(self.interface
1523
+ '\0'))
1980
1524
except socket.error as error:
1981
if error.errno == errno.EPERM:
1982
logger.error("No permission to bind to"
1983
" interface %s", self.interface)
1984
elif error.errno == errno.ENOPROTOOPT:
1525
if error[0] == errno.EPERM:
1526
logger.error("No permission to"
1527
" bind to interface %s",
1528
self.interface)
1529
elif error[0] == errno.ENOPROTOOPT:
1985
1530
logger.error("SO_BINDTODEVICE not available;"
1986
1531
" cannot bind to interface %s",
1987
1532
self.interface)
1988
elif error.errno == errno.ENODEV:
1989
logger.error("Interface %s does not exist,"
1990
" cannot bind", self.interface)
1991
1533
else:
1992
1534
raise
1993
1535
# Only bind(2) the socket if we really need to.
1996
1538
if self.address_family == socket.AF_INET6:
1997
1539
any_address = "::" # in6addr_any
1998
1540
else:
1999
any_address = "0.0.0.0" # INADDR_ANY
1541
any_address = socket.INADDR_ANY
2000
1542
self.server_address = (any_address,
2001
1543
self.server_address[1])
2002
1544
elif not self.server_address[1]:
2023
1565
"""
2024
1566
def __init__(self, server_address, RequestHandlerClass,
2025
1567
interface=None, use_ipv6=True, clients=None,
2026
gnutls_priority=None, use_dbus=True, socketfd=None):
1568
gnutls_priority=None, use_dbus=True):
2027
1569
self.enabled = False
2028
1570
self.clients = clients
2029
1571
if self.clients is None:
2030
self.clients = {}
1572
self.clients = set()
2031
1573
self.use_dbus = use_dbus
2032
1574
self.gnutls_priority = gnutls_priority
2033
1575
IPv6_TCPServer.__init__(self, server_address,
2034
1576
RequestHandlerClass,
2035
1577
interface = interface,
2036
use_ipv6 = use_ipv6,
2037
socketfd = socketfd)
1578
use_ipv6 = use_ipv6)
2038
1579
def server_activate(self):
2039
1580
if self.enabled:
2040
1581
return socketserver.TCPServer.server_activate(self)
2041
2042
1582
def enable(self):
2043
1583
self.enabled = True
2044
2045
def add_pipe(self, parent_pipe, proc):
1584
def add_pipe(self, parent_pipe):
2046
1585
# Call "handle_ipc" for both data and EOF events
2047
1586
gobject.io_add_watch(parent_pipe.fileno(),
2048
1587
gobject.IO_IN | gobject.IO_HUP,
2049
1588
functools.partial(self.handle_ipc,
2050
parent_pipe =
2051
parent_pipe,
2052
proc = proc))
2053
1589
parent_pipe = parent_pipe))
1590
2054
1591
def handle_ipc(self, source, condition, parent_pipe=None,
2055
proc = None, client_object=None):
2056
# error, or the other end of multiprocessing.Pipe has closed
2057
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2058
# Wait for other process to exit
2059
proc.join()
1592
client_object=None):
1593
condition_names = {
1594
gobject.IO_IN: "IN", # There is data to read.
1595
gobject.IO_OUT: "OUT", # Data can be written (without
1596
# blocking).
1597
gobject.IO_PRI: "PRI", # There is urgent data to read.
1598
gobject.IO_ERR: "ERR", # Error condition.
1599
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1600
# broken, usually for pipes and
1601
# sockets).
1602
}
1603
conditions_string = ' | '.join(name
1604
for cond, name in
1605
condition_names.iteritems()
1606
if cond & condition)
1607
# error or the other end of multiprocessing.Pipe has closed
1608
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2060
1609
return False
2061
1610
2062
1611
# Read a request from the child
2067
1616
fpr = request[1]
2068
1617
address = request[2]
2069
1618
2070
for c in self.clients.itervalues():
1619
for c in self.clients:
2071
1620
if c.fingerprint == fpr:
2072
1621
client = c
2073
1622
break
2076
1625
"dress: %s", fpr, address)
2077
1626
if self.use_dbus:
2078
1627
# Emit D-Bus signal
2079
mandos_dbus_service.ClientNotFound(fpr,
2080
address[0])
1628
mandos_dbus_service.ClientNotFound(fpr, address[0])
2081
1629
parent_pipe.send(False)
2082
1630
return False
2083
1631
2084
1632
gobject.io_add_watch(parent_pipe.fileno(),
2085
1633
gobject.IO_IN | gobject.IO_HUP,
2086
1634
functools.partial(self.handle_ipc,
2087
parent_pipe =
2088
parent_pipe,
2089
proc = proc,
2090
client_object =
2091
client))
1635
parent_pipe = parent_pipe,
1636
client_object = client))
2092
1637
parent_pipe.send(True)
2093
# remove the old hook in favor of the new above hook on
2094
# same fileno
1638
# remove the old hook in favor of the new above hook on same fileno
2095
1639
return False
2096
1640
if command == 'funcall':
2097
1641
funcname = request[1]
2098
1642
args = request[2]
2099
1643
kwargs = request[3]
2100
1644
2101
parent_pipe.send(('data', getattr(client_object,
2102
funcname)(*args,
2103
**kwargs)))
2104
1645
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1646
2105
1647
if command == 'getattr':
2106
1648
attrname = request[1]
2107
1649
if callable(client_object.__getattribute__(attrname)):
2108
1650
parent_pipe.send(('function',))
2109
1651
else:
2110
parent_pipe.send(('data', client_object
2111
.__getattribute__(attrname)))
1652
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2112
1653
2113
1654
if command == 'setattr':
2114
1655
attrname = request[1]
2115
1656
value = request[2]
2116
1657
setattr(client_object, attrname, value)
2117
1658
2118
1659
return True
2119
1660
2120
1661
2121
def rfc3339_duration_to_delta(duration):
2122
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2123
2124
>>> rfc3339_duration_to_delta("P7D")
2125
datetime.timedelta(7)
2126
>>> rfc3339_duration_to_delta("PT60S")
2127
datetime.timedelta(0, 60)
2128
>>> rfc3339_duration_to_delta("PT60M")
2129
datetime.timedelta(0, 3600)
2130
>>> rfc3339_duration_to_delta("PT24H")
2131
datetime.timedelta(1)
2132
>>> rfc3339_duration_to_delta("P1W")
2133
datetime.timedelta(7)
2134
>>> rfc3339_duration_to_delta("PT5M30S")
2135
datetime.timedelta(0, 330)
2136
>>> rfc3339_duration_to_delta("P1DT3M20S")
2137
datetime.timedelta(1, 200)
2138
"""
2139
2140
# Parsing an RFC 3339 duration with regular expressions is not
2141
# possible - there would have to be multiple places for the same
2142
# values, like seconds. The current code, while more esoteric, is
2143
# cleaner without depending on a parsing library. If Python had a
2144
# built-in library for parsing we would use it, but we'd like to
2145
# avoid excessive use of external libraries.
2146
2147
# New type for defining tokens, syntax, and semantics all-in-one
2148
Token = collections.namedtuple("Token",
2149
("regexp", # To match token; if
2150
# "value" is not None,
2151
# must have a "group"
2152
# containing digits
2153
"value", # datetime.timedelta or
2154
# None
2155
"followers")) # Tokens valid after
2156
# this token
2157
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2158
# the "duration" ABNF definition in RFC 3339, Appendix A.
2159
token_end = Token(re.compile(r"$"), None, frozenset())
2160
token_second = Token(re.compile(r"(\d+)S"),
2161
datetime.timedelta(seconds=1),
2162
frozenset((token_end,)))
2163
token_minute = Token(re.compile(r"(\d+)M"),
2164
datetime.timedelta(minutes=1),
2165
frozenset((token_second, token_end)))
2166
token_hour = Token(re.compile(r"(\d+)H"),
2167
datetime.timedelta(hours=1),
2168
frozenset((token_minute, token_end)))
2169
token_time = Token(re.compile(r"T"),
2170
None,
2171
frozenset((token_hour, token_minute,
2172
token_second)))
2173
token_day = Token(re.compile(r"(\d+)D"),
2174
datetime.timedelta(days=1),
2175
frozenset((token_time, token_end)))
2176
token_month = Token(re.compile(r"(\d+)M"),
2177
datetime.timedelta(weeks=4),
2178
frozenset((token_day, token_end)))
2179
token_year = Token(re.compile(r"(\d+)Y"),
2180
datetime.timedelta(weeks=52),
2181
frozenset((token_month, token_end)))
2182
token_week = Token(re.compile(r"(\d+)W"),
2183
datetime.timedelta(weeks=1),
2184
frozenset((token_end,)))
2185
token_duration = Token(re.compile(r"P"), None,
2186
frozenset((token_year, token_month,
2187
token_day, token_time,
2188
token_week)))
2189
# Define starting values
2190
value = datetime.timedelta() # Value so far
2191
found_token = None
2192
followers = frozenset((token_duration,)) # Following valid tokens
2193
s = duration # String left to parse
2194
# Loop until end token is found
2195
while found_token is not token_end:
2196
# Search for any currently valid tokens
2197
for token in followers:
2198
match = token.regexp.match(s)
2199
if match is not None:
2200
# Token found
2201
if token.value is not None:
2202
# Value found, parse digits
2203
factor = int(match.group(1), 10)
2204
# Add to value so far
2205
value += factor * token.value
2206
# Strip token from string
2207
s = token.regexp.sub("", s, 1)
2208
# Go to found token
2209
found_token = token
2210
# Set valid next tokens
2211
followers = found_token.followers
2212
break
2213
else:
2214
# No currently valid tokens were found
2215
raise ValueError("Invalid RFC 3339 duration")
2216
# End token found
2217
return value
2218
2219
2220
1662
def string_to_delta(interval):
2221
1663
"""Parse a string and return a datetime.timedelta
2222
1664
2233
1675
>>> string_to_delta('5m 30s')
2234
1676
datetime.timedelta(0, 330)
2235
1677
"""
2236
2237
try:
2238
return rfc3339_duration_to_delta(interval)
2239
except ValueError:
2240
pass
2241
2242
1678
timevalue = datetime.timedelta(0)
2243
1679
for s in interval.split():
2244
1680
try:
2245
suffix = s[-1]
1681
suffix = unicode(s[-1])
2246
1682
value = int(s[:-1])
2247
1683
if suffix == "d":
2248
1684
delta = datetime.timedelta(value)
2255
1691
elif suffix == "w":
2256
1692
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2257
1693
else:
2258
raise ValueError("Unknown suffix {!r}"
2259
.format(suffix))
2260
except IndexError as e:
1694
raise ValueError("Unknown suffix %r" % suffix)
1695
except (ValueError, IndexError) as e:
2261
1696
raise ValueError(*(e.args))
2262
1697
timevalue += delta
2263
1698
return timevalue
2264
1699
2265
1700
1701
def if_nametoindex(interface):
1702
"""Call the C function if_nametoindex(), or equivalent
1703
1704
Note: This function cannot accept a unicode string."""
1705
global if_nametoindex
1706
try:
1707
if_nametoindex = (ctypes.cdll.LoadLibrary
1708
(ctypes.util.find_library("c"))
1709
.if_nametoindex)
1710
except (OSError, AttributeError):
1711
logger.warning("Doing if_nametoindex the hard way")
1712
def if_nametoindex(interface):
1713
"Get an interface index the hard way, i.e. using fcntl()"
1714
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1715
with contextlib.closing(socket.socket()) as s:
1716
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1717
struct.pack(str("16s16x"),
1718
interface))
1719
interface_index = struct.unpack(str("I"),
1720
ifreq[16:20])[0]
1721
return interface_index
1722
return if_nametoindex(interface)
1723
1724
2266
1725
def daemon(nochdir = False, noclose = False):
2267
1726
"""See daemon(3). Standard BSD Unix function.
2268
1727
2276
1735
sys.exit()
2277
1736
if not noclose:
2278
1737
# Close all standard open file descriptors
2279
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1738
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2280
1739
if not stat.S_ISCHR(os.fstat(null).st_mode):
2281
raise OSError(errno.ENODEV, "{} not a character device"
2282
.format(os.devnull))
1740
raise OSError(errno.ENODEV,
1741
"%s not a character device"
1742
% os.path.devnull)
2283
1743
os.dup2(null, sys.stdin.fileno())
2284
1744
os.dup2(null, sys.stdout.fileno())
2285
1745
os.dup2(null, sys.stderr.fileno())
2294
1754
2295
1755
parser = argparse.ArgumentParser()
2296
1756
parser.add_argument("-v", "--version", action="version",
2297
version = "%(prog)s {}".format(version),
1757
version = "%%(prog)s %s" % version,
2298
1758
help="show version number and exit")
2299
1759
parser.add_argument("-i", "--interface", metavar="IF",
2300
1760
help="Bind to interface IF")
2306
1766
help="Run self-test")
2307
1767
parser.add_argument("--debug", action="store_true",
2308
1768
help="Debug mode; run in foreground and log"
2309
" to terminal", default=None)
1769
" to terminal")
2310
1770
parser.add_argument("--debuglevel", metavar="LEVEL",
2311
1771
help="Debug level for stdout output")
2312
1772
parser.add_argument("--priority", help="GnuTLS"
2319
1779
" files")
2320
1780
parser.add_argument("--no-dbus", action="store_false",
2321
1781
dest="use_dbus", help="Do not provide D-Bus"
2322
" system bus interface", default=None)
1782
" system bus interface")
2323
1783
parser.add_argument("--no-ipv6", action="store_false",
2324
dest="use_ipv6", help="Do not use IPv6",
2325
default=None)
2326
parser.add_argument("--no-restore", action="store_false",
2327
dest="restore", help="Do not restore stored"
2328
" state", default=None)
2329
parser.add_argument("--socket", type=int,
2330
help="Specify a file descriptor to a network"
2331
" socket to use instead of creating one")
2332
parser.add_argument("--statedir", metavar="DIR",
2333
help="Directory to save/restore state in")
2334
parser.add_argument("--foreground", action="store_true",
2335
help="Run in foreground", default=None)
2336
parser.add_argument("--no-zeroconf", action="store_false",
2337
dest="zeroconf", help="Do not use Zeroconf",
2338
default=None)
2339
1784
dest="use_ipv6", help="Do not use IPv6")
2340
1785
options = parser.parse_args()
2341
1786
2342
1787
if options.check:
2343
1788
import doctest
2344
fail_count, test_count = doctest.testmod()
2345
sys.exit(os.EX_OK if fail_count == 0 else 1)
1789
doctest.testmod()
1790
sys.exit()
2346
1791
2347
1792
# Default values for config file for server-global settings
2348
1793
server_defaults = { "interface": "",
2350
1795
"port": "",
2351
1796
"debug": "False",
2352
1797
"priority":
2353
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1798
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2354
1799
"servicename": "Mandos",
2355
1800
"use_dbus": "True",
2356
1801
"use_ipv6": "True",
2357
1802
"debuglevel": "",
2358
"restore": "True",
2359
"socket": "",
2360
"statedir": "/var/lib/mandos",
2361
"foreground": "False",
2362
"zeroconf": "True",
2363
1803
}
2364
1804
2365
1805
# Parse config file for server-global settings
2370
1810
# Convert the SafeConfigParser object to a dict
2371
1811
server_settings = server_config.defaults()
2372
1812
# Use the appropriate methods on the non-string config options
2373
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1813
for option in ("debug", "use_dbus", "use_ipv6"):
2374
1814
server_settings[option] = server_config.getboolean("DEFAULT",
2375
1815
option)
2376
1816
if server_settings["port"]:
2377
1817
server_settings["port"] = server_config.getint("DEFAULT",
2378
1818
"port")
2379
if server_settings["socket"]:
2380
server_settings["socket"] = server_config.getint("DEFAULT",
2381
"socket")
2382
# Later, stdin will, and stdout and stderr might, be dup'ed
2383
# over with an opened os.devnull. But we don't want this to
2384
# happen with a supplied network socket.
2385
if 0 <= server_settings["socket"] <= 2:
2386
server_settings["socket"] = os.dup(server_settings
2387
["socket"])
2388
1819
del server_config
2389
1820
2390
1821
# Override the settings from the config file with command line
2391
1822
# options, if set.
2392
1823
for option in ("interface", "address", "port", "debug",
2393
1824
"priority", "servicename", "configdir",
2394
"use_dbus", "use_ipv6", "debuglevel", "restore",
2395
"statedir", "socket", "foreground", "zeroconf"):
1825
"use_dbus", "use_ipv6", "debuglevel"):
2396
1826
value = getattr(options, option)
2397
1827
if value is not None:
2398
1828
server_settings[option] = value
2399
1829
del options
2400
1830
# Force all strings to be unicode
2401
1831
for option in server_settings.keys():
2402
if isinstance(server_settings[option], bytes):
2403
server_settings[option] = (server_settings[option]
2404
.decode("utf-8"))
2405
# Force all boolean options to be boolean
2406
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2407
"foreground", "zeroconf"):
2408
server_settings[option] = bool(server_settings[option])
2409
# Debug implies foreground
2410
if server_settings["debug"]:
2411
server_settings["foreground"] = True
1832
if type(server_settings[option]) is str:
1833
server_settings[option] = unicode(server_settings[option])
2412
1834
# Now we have our good server settings in "server_settings"
2413
1835
2414
1836
##################################################################
2415
1837
2416
if (not server_settings["zeroconf"] and
2417
not (server_settings["port"]
2418
or server_settings["socket"] != "")):
2419
parser.error("Needs port or socket to work without"
2420
" Zeroconf")
2421
2422
1838
# For convenience
2423
1839
debug = server_settings["debug"]
2424
1840
debuglevel = server_settings["debuglevel"]
2425
1841
use_dbus = server_settings["use_dbus"]
2426
1842
use_ipv6 = server_settings["use_ipv6"]
2427
stored_state_path = os.path.join(server_settings["statedir"],
2428
stored_state_file)
2429
foreground = server_settings["foreground"]
2430
zeroconf = server_settings["zeroconf"]
2431
2432
if debug:
2433
initlogger(debug, logging.DEBUG)
2434
else:
2435
if not debuglevel:
2436
initlogger(debug)
2437
else:
2438
level = getattr(logging, debuglevel.upper())
2439
initlogger(debug, level)
2440
1843
2441
1844
if server_settings["servicename"] != "Mandos":
2442
1845
syslogger.setFormatter(logging.Formatter
2443
('Mandos ({}) [%(process)d]:'
2444
' %(levelname)s: %(message)s'
2445
.format(server_settings
2446
["servicename"])))
1846
('Mandos (%s) [%%(process)d]:'
1847
' %%(levelname)s: %%(message)s'
1848
% server_settings["servicename"]))
2447
1849
2448
1850
# Parse config file with clients
2449
client_config = configparser.SafeConfigParser(Client
2450
.client_defaults)
1851
client_defaults = { "timeout": "5m",
1852
"extended_timeout": "15m",
1853
"interval": "2m",
1854
"checker": "fping -q -- %%(host)s",
1855
"host": "",
1856
"approval_delay": "0s",
1857
"approval_duration": "1s",
1858
}
1859
client_config = configparser.SafeConfigParser(client_defaults)
2451
1860
client_config.read(os.path.join(server_settings["configdir"],
2452
1861
"clients.conf"))
2453
1862
2454
1863
global mandos_dbus_service
2455
1864
mandos_dbus_service = None
2456
1865
2457
socketfd = None
2458
if server_settings["socket"] != "":
2459
socketfd = server_settings["socket"]
2460
1866
tcp_server = MandosServer((server_settings["address"],
2461
1867
server_settings["port"]),
2462
1868
ClientHandler,
2465
1871
use_ipv6=use_ipv6,
2466
1872
gnutls_priority=
2467
1873
server_settings["priority"],
2468
use_dbus=use_dbus,
2469
socketfd=socketfd)
2470
if not foreground:
2471
pidfilename = "/run/mandos.pid"
2472
if not os.path.isdir("/run/."):
2473
pidfilename = "/var/run/mandos.pid"
2474
pidfile = None
1874
use_dbus=use_dbus)
1875
if not debug:
1876
pidfilename = "/var/run/mandos.pid"
2475
1877
try:
2476
1878
pidfile = open(pidfilename, "w")
2477
except IOError as e:
2478
logger.error("Could not open file %r", pidfilename,
2479
exc_info=e)
1879
except IOError:
1880
logger.error("Could not open file %r", pidfilename)
2480
1881
2481
for name in ("_mandos", "mandos", "nobody"):
1882
try:
1883
uid = pwd.getpwnam("_mandos").pw_uid
1884
gid = pwd.getpwnam("_mandos").pw_gid
1885
except KeyError:
2482
1886
try:
2483
uid = pwd.getpwnam(name).pw_uid
2484
gid = pwd.getpwnam(name).pw_gid
2485
break
1887
uid = pwd.getpwnam("mandos").pw_uid
1888
gid = pwd.getpwnam("mandos").pw_gid
2486
1889
except KeyError:
2487
continue
2488
else:
2489
uid = 65534
2490
gid = 65534
1890
try:
1891
uid = pwd.getpwnam("nobody").pw_uid
1892
gid = pwd.getpwnam("nobody").pw_gid
1893
except KeyError:
1894
uid = 65534
1895
gid = 65534
2491
1896
try:
2492
1897
os.setgid(gid)
2493
1898
os.setuid(uid)
2494
1899
except OSError as error:
2495
if error.errno != errno.EPERM:
2496
raise
1900
if error[0] != errno.EPERM:
1901
raise error
2497
1902
1903
if not debug and not debuglevel:
1904
syslogger.setLevel(logging.WARNING)
1905
console.setLevel(logging.WARNING)
1906
if debuglevel:
1907
level = getattr(logging, debuglevel.upper())
1908
syslogger.setLevel(level)
1909
console.setLevel(level)
1910
2498
1911
if debug:
2499
1912
# Enable all possible GnuTLS debugging
2500
1913
2510
1923
.gnutls_global_set_log_function(debug_gnutls))
2511
1924
2512
1925
# Redirect stdin so all checkers get /dev/null
2513
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1926
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2514
1927
os.dup2(null, sys.stdin.fileno())
2515
1928
if null > 2:
2516
1929
os.close(null)
1930
else:
1931
# No console logging
1932
logger.removeHandler(console)
2517
1933
2518
1934
# Need to fork before connecting to D-Bus
2519
if not foreground:
1935
if not debug:
2520
1936
# Close all input and output, do double fork, etc.
2521
1937
daemon()
2522
1938
2523
# multiprocessing will use threads, so before we use gobject we
2524
# need to inform gobject that threads will be used.
2525
gobject.threads_init()
2526
2527
1939
global main_loop
2528
1940
# From the Avahi example code
2529
DBusGMainLoop(set_as_default=True)
1941
DBusGMainLoop(set_as_default=True )
2530
1942
main_loop = gobject.MainLoop()
2531
1943
bus = dbus.SystemBus()
2532
1944
# End of Avahi example code
2533
1945
if use_dbus:
2534
1946
try:
2535
bus_name = dbus.service.BusName("se.recompile.Mandos",
1947
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2536
1948
bus, do_not_queue=True)
2537
old_bus_name = (dbus.service.BusName
2538
("se.bsnet.fukt.Mandos", bus,
2539
do_not_queue=True))
2540
1949
except dbus.exceptions.NameExistsException as e:
2541
logger.error("Disabling D-Bus:", exc_info=e)
1950
logger.error(unicode(e) + ", disabling D-Bus")
2542
1951
use_dbus = False
2543
1952
server_settings["use_dbus"] = False
2544
1953
tcp_server.use_dbus = False
2545
if zeroconf:
2546
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2547
service = AvahiServiceToSyslog(name =
2548
server_settings["servicename"],
2549
servicetype = "_mandos._tcp",
2550
protocol = protocol, bus = bus)
2551
if server_settings["interface"]:
2552
service.interface = (if_nametoindex
2553
(server_settings["interface"]
2554
.encode("utf-8")))
1954
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1955
service = AvahiService(name = server_settings["servicename"],
1956
servicetype = "_mandos._tcp",
1957
protocol = protocol, bus = bus)
1958
if server_settings["interface"]:
1959
service.interface = (if_nametoindex
1960
(str(server_settings["interface"])))
2555
1961
2556
1962
global multiprocessing_manager
2557
1963
multiprocessing_manager = multiprocessing.Manager()
2559
1965
client_class = Client
2560
1966
if use_dbus:
2561
1967
client_class = functools.partial(ClientDBus, bus = bus)
2562
2563
client_settings = Client.config_parser(client_config)
2564
old_client_settings = {}
2565
clients_data = {}
2566
2567
# This is used to redirect stdout and stderr for checker processes
2568
global wnull
2569
wnull = open(os.devnull, "w") # A writable /dev/null
2570
# Only used if server is running in foreground but not in debug
2571
# mode
2572
if debug or not foreground:
2573
wnull.close()
2574
2575
# Get client data and settings from last running state.
2576
if server_settings["restore"]:
2577
try:
2578
with open(stored_state_path, "rb") as stored_state:
2579
clients_data, old_client_settings = (pickle.load
2580
(stored_state))
2581
os.remove(stored_state_path)
2582
except IOError as e:
2583
if e.errno == errno.ENOENT:
2584
logger.warning("Could not load persistent state: {}"
2585
.format(os.strerror(e.errno)))
2586
else:
2587
logger.critical("Could not load persistent state:",
2588
exc_info=e)
2589
raise
2590
except EOFError as e:
2591
logger.warning("Could not load persistent state: "
2592
"EOFError:", exc_info=e)
2593
2594
with PGPEngine() as pgp:
2595
for client_name, client in clients_data.items():
2596
# Skip removed clients
2597
if client_name not in client_settings:
2598
continue
2599
2600
# Decide which value to use after restoring saved state.
2601
# We have three different values: Old config file,
2602
# new config file, and saved state.
2603
# New config value takes precedence if it differs from old
2604
# config value, otherwise use saved state.
2605
for name, value in client_settings[client_name].items():
2606
try:
2607
# For each value in new config, check if it
2608
# differs from the old config value (Except for
2609
# the "secret" attribute)
2610
if (name != "secret" and
2611
value != old_client_settings[client_name]
2612
[name]):
2613
client[name] = value
2614
except KeyError:
2615
pass
2616
2617
# Clients who has passed its expire date can still be
2618
# enabled if its last checker was successful. Clients
2619
# whose checker succeeded before we stored its state is
2620
# assumed to have successfully run all checkers during
2621
# downtime.
2622
if client["enabled"]:
2623
if datetime.datetime.utcnow() >= client["expires"]:
2624
if not client["last_checked_ok"]:
2625
logger.warning(
2626
"disabling client {} - Client never "
2627
"performed a successful checker"
2628
.format(client_name))
2629
client["enabled"] = False
2630
elif client["last_checker_status"] != 0:
2631
logger.warning(
2632
"disabling client {} - Client last"
2633
" checker failed with error code {}"
2634
.format(client_name,
2635
client["last_checker_status"]))
2636
client["enabled"] = False
2637
else:
2638
client["expires"] = (datetime.datetime
2639
.utcnow()
2640
+ client["timeout"])
2641
logger.debug("Last checker succeeded,"
2642
" keeping {} enabled"
2643
.format(client_name))
1968
def client_config_items(config, section):
1969
special_settings = {
1970
"approved_by_default":
1971
lambda: config.getboolean(section,
1972
"approved_by_default"),
1973
}
1974
for name, value in config.items(section):
2644
1975
try:
2645
client["secret"] = (
2646
pgp.decrypt(client["encrypted_secret"],
2647
client_settings[client_name]
2648
["secret"]))
2649
except PGPError:
2650
# If decryption fails, we use secret from new settings
2651
logger.debug("Failed to decrypt {} old secret"
2652
.format(client_name))
2653
client["secret"] = (
2654
client_settings[client_name]["secret"])
2655
2656
# Add/remove clients based on new changes made to config
2657
for client_name in (set(old_client_settings)
2658
- set(client_settings)):
2659
del clients_data[client_name]
2660
for client_name in (set(client_settings)
2661
- set(old_client_settings)):
2662
clients_data[client_name] = client_settings[client_name]
2663
2664
# Create all client objects
2665
for client_name, client in clients_data.items():
2666
tcp_server.clients[client_name] = client_class(
2667
name = client_name, settings = client,
2668
server_settings = server_settings)
2669
1976
yield (name, special_settings[name]())
1977
except KeyError:
1978
yield (name, value)
1979
1980
tcp_server.clients.update(set(
1981
client_class(name = section,
1982
config= dict(client_config_items(
1983
client_config, section)))
1984
for section in client_config.sections()))
2670
1985
if not tcp_server.clients:
2671
1986
logger.warning("No clients defined")
2672
2673
if not foreground:
2674
if pidfile is not None:
2675
try:
2676
with pidfile:
2677
pid = os.getpid()
2678
pidfile.write("{}\n".format(pid).encode("utf-8"))
2679
except IOError:
2680
logger.error("Could not write to file %r with PID %d",
2681
pidfilename, pid)
2682
del pidfile
1987
1988
if not debug:
1989
try:
1990
with pidfile:
1991
pid = os.getpid()
1992
pidfile.write(str(pid) + "\n".encode("utf-8"))
1993
del pidfile
1994
except IOError:
1995
logger.error("Could not write to file %r with PID %d",
1996
pidfilename, pid)
1997
except NameError:
1998
# "pidfile" was never created
1999
pass
2683
2000
del pidfilename
2684
2001
2002
signal.signal(signal.SIGINT, signal.SIG_IGN)
2003
2685
2004
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2686
2005
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2687
2006
2688
2007
if use_dbus:
2689
@alternate_dbus_interfaces({"se.recompile.Mandos":
2690
"se.bsnet.fukt.Mandos"})
2691
class MandosDBusService(DBusObjectWithProperties):
2008
class MandosDBusService(dbus.service.Object):
2692
2009
"""A D-Bus proxy object"""
2693
2010
def __init__(self):
2694
2011
dbus.service.Object.__init__(self, bus, "/")
2695
_interface = "se.recompile.Mandos"
2696
2697
@dbus_interface_annotations(_interface)
2698
def _foo(self):
2699
return { "org.freedesktop.DBus.Property"
2700
".EmitsChangedSignal":
2701
"false"}
2012
_interface = "se.bsnet.fukt.Mandos"
2702
2013
2703
2014
@dbus.service.signal(_interface, signature="o")
2704
2015
def ClientAdded(self, objpath):
2719
2030
def GetAllClients(self):
2720
2031
"D-Bus method"
2721
2032
return dbus.Array(c.dbus_object_path
2722
for c in
2723
tcp_server.clients.itervalues())
2033
for c in tcp_server.clients)
2724
2034
2725
2035
@dbus.service.method(_interface,
2726
2036
out_signature="a{oa{sv}}")
2727
2037
def GetAllClientsWithProperties(self):
2728
2038
"D-Bus method"
2729
2039
return dbus.Dictionary(
2730
{ c.dbus_object_path: c.GetAll("")
2731
for c in tcp_server.clients.itervalues() },
2040
((c.dbus_object_path, c.GetAll(""))
2041
for c in tcp_server.clients),
2732
2042
signature="oa{sv}")
2733
2043
2734
2044
@dbus.service.method(_interface, in_signature="o")
2735
2045
def RemoveClient(self, object_path):
2736
2046
"D-Bus method"
2737
for c in tcp_server.clients.itervalues():
2047
for c in tcp_server.clients:
2738
2048
if c.dbus_object_path == object_path:
2739
del tcp_server.clients[c.name]
2049
tcp_server.clients.remove(c)
2740
2050
c.remove_from_connection()
2741
2051
# Don't signal anything except ClientRemoved
2742
2052
c.disable(quiet=True)
2751
2061
2752
2062
def cleanup():
2753
2063
"Cleanup function; run on exit"
2754
if zeroconf:
2755
service.cleanup()
2756
2757
multiprocessing.active_children()
2758
wnull.close()
2759
if not (tcp_server.clients or client_settings):
2760
return
2761
2762
# Store client before exiting. Secrets are encrypted with key
2763
# based on what config file has. If config file is
2764
# removed/edited, old secret will thus be unrecovable.
2765
clients = {}
2766
with PGPEngine() as pgp:
2767
for client in tcp_server.clients.itervalues():
2768
key = client_settings[client.name]["secret"]
2769
client.encrypted_secret = pgp.encrypt(client.secret,
2770
key)
2771
client_dict = {}
2772
2773
# A list of attributes that can not be pickled
2774
# + secret.
2775
exclude = { "bus", "changedstate", "secret",
2776
"checker", "server_settings" }
2777
for name, typ in (inspect.getmembers
2778
(dbus.service.Object)):
2779
exclude.add(name)
2780
2781
client_dict["encrypted_secret"] = (client
2782
.encrypted_secret)
2783
for attr in client.client_structure:
2784
if attr not in exclude:
2785
client_dict[attr] = getattr(client, attr)
2786
2787
clients[client.name] = client_dict
2788
del client_settings[client.name]["secret"]
2789
2790
try:
2791
with (tempfile.NamedTemporaryFile
2792
(mode='wb', suffix=".pickle", prefix='clients-',
2793
dir=os.path.dirname(stored_state_path),
2794
delete=False)) as stored_state:
2795
pickle.dump((clients, client_settings), stored_state)
2796
tempname=stored_state.name
2797
os.rename(tempname, stored_state_path)
2798
except (IOError, OSError) as e:
2799
if not debug:
2800
try:
2801
os.remove(tempname)
2802
except NameError:
2803
pass
2804
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2805
logger.warning("Could not save persistent state: {}"
2806
.format(os.strerror(e.errno)))
2807
else:
2808
logger.warning("Could not save persistent state:",
2809
exc_info=e)
2810
raise
2811
2812
# Delete all clients, and settings from config
2064
service.cleanup()
2065
2813
2066
while tcp_server.clients:
2814
name, client = tcp_server.clients.popitem()
2067
client = tcp_server.clients.pop()
2815
2068
if use_dbus:
2816
2069
client.remove_from_connection()
2070
client.disable_hook = None
2817
2071
# Don't signal anything except ClientRemoved
2818
2072
client.disable(quiet=True)
2819
2073
if use_dbus:
2820
2074
# Emit D-Bus signal
2821
mandos_dbus_service.ClientRemoved(client
2822
.dbus_object_path,
2075
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2823
2076
client.name)
2824
client_settings.clear()
2825
2077
2826
2078
atexit.register(cleanup)
2827
2079
2828
for client in tcp_server.clients.itervalues():
2080
for client in tcp_server.clients:
2829
2081
if use_dbus:
2830
2082
# Emit D-Bus signal
2831
2083
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2832
# Need to initiate checking of clients
2833
if client.enabled:
2834
client.init_checker()
2084
client.enable()
2835
2085
2836
2086
tcp_server.enable()
2837
2087
tcp_server.server_activate()
2838
2088
2839
2089
# Find out what port we got
2840
if zeroconf:
2841
service.port = tcp_server.socket.getsockname()[1]
2090
service.port = tcp_server.socket.getsockname()[1]
2842
2091
if use_ipv6:
2843
2092
logger.info("Now listening on address %r, port %d,"
2844
" flowinfo %d, scope_id %d",
2845
*tcp_server.socket.getsockname())
2093
" flowinfo %d, scope_id %d"
2094
% tcp_server.socket.getsockname())
2846
2095
else: # IPv4
2847
logger.info("Now listening on address %r, port %d",
2848
*tcp_server.socket.getsockname())
2096
logger.info("Now listening on address %r, port %d"
2097
% tcp_server.socket.getsockname())
2849
2098
2850
2099
#service.interface = tcp_server.socket.getsockname()[3]
2851
2100
2852
2101
try:
2853
if zeroconf:
2854
# From the Avahi example code
2855
try:
2856
service.activate()
2857
except dbus.exceptions.DBusException as error:
2858
logger.critical("D-Bus Exception", exc_info=error)
2859
cleanup()
2860
sys.exit(1)
2861
# End of Avahi example code
2102
# From the Avahi example code
2103
try:
2104
service.activate()
2105
except dbus.exceptions.DBusException as error:
2106
logger.critical("DBusException: %s", error)
2107
cleanup()
2108
sys.exit(1)
2109
# End of Avahi example code
2862
2110
2863
2111
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2864
2112
lambda *args, **kwargs:
2868
2116
logger.debug("Starting main loop")
2869
2117
main_loop.run()
2870
2118
except AvahiError as error:
2871
logger.critical("Avahi Error", exc_info=error)
2119
logger.critical("AvahiError: %s", error)
2872
2120
cleanup()
2873
2121
sys.exit(1)
2874
2122
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0