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- Committer: Teddy Hogeborn
- Date: 2011-09-19 09:22:34 UTC
- mfrom: (24.1.181 mandos)
- Revision ID: teddy@fukt.bsnet.se-20110919092234-g03hzbsekt65a632
Merge from Björn
- files removed:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python2.7
1
#!/usr/bin/python
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2
# -*- mode: python; coding: utf-8 -*-
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3
#
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# Mandos server - give out binary blobs to connecting clients.
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# "AvahiService" class, and some lines in "main".
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#
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# Everything else is
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# Copyright © 2008-2014 Teddy Hogeborn
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# Copyright © 2008-2014 Björn Påhlsson
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# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@recompile.se>.
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# Contact the authors at <mandos@fukt.bsnet.se>.
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#
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34
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from __future__ import (division, absolute_import, print_function,
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unicode_literals)
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36
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from future_builtins import *
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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
69
import tempfile
70
import itertools
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import collections
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65
73
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import dbus
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67
import dbus.service
88
81
except ImportError:
89
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SO_BINDTODEVICE = None
90
83
91
if sys.version_info.major == 2:
92
str = unicode
93
94
version = "1.6.9"
95
stored_state_file = "clients.pickle"
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logger = logging.getLogger()
98
syslogger = None
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100
try:
101
if_nametoindex = (ctypes.cdll.LoadLibrary
102
(ctypes.util.find_library("c"))
103
.if_nametoindex)
104
except (OSError, AttributeError):
105
def if_nametoindex(interface):
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"Get an interface index the hard way, i.e. using fcntl()"
107
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
108
with contextlib.closing(socket.socket()) as s:
109
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
110
struct.pack(b"16s16x", interface))
111
interface_index = struct.unpack("I", ifreq[16:20])[0]
112
return interface_index
113
114
115
def initlogger(debug, level=logging.WARNING):
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"""init logger and add loglevel"""
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global syslogger
119
syslogger = (logging.handlers.SysLogHandler
120
(facility =
121
logging.handlers.SysLogHandler.LOG_DAEMON,
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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):
161
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
205
def decrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(dir = self.tempdir
208
) as passfile:
209
passfile.write(passphrase)
210
passfile.flush()
211
proc = subprocess.Popen(['gpg', '--decrypt',
212
'--passphrase-file',
213
passfile.name]
214
+ self.gnupgargs,
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
decrypted_plaintext, err = proc.communicate(input
219
= data)
220
if proc.returncode != 0:
221
raise PGPError(err)
222
return decrypted_plaintext
223
84
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version = "1.3.1"
86
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#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
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logger.addHandler(syslogger)
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console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
224
102
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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
110
class AvahiServiceError(AvahiError):
232
111
pass
243
122
Used to optionally bind to the specified interface.
244
123
name: string; Example: 'Mandos'
245
124
type: string; Example: '_mandos._tcp'.
246
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
247
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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
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
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servicetype = None, port = None, TXT = None,
261
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domain = "", host = "", max_renames = 32768,
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152
self.server = None
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153
self.bus = bus
276
154
self.entry_group_state_changed_match = None
277
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def rename(self, remove=True):
155
def rename(self):
279
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"""Derived from the Avahi example code"""
280
157
if self.rename_count >= self.max_renames:
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158
logger.critical("No suitable Zeroconf service name found"
282
159
" after %i retries, exiting.",
283
160
self.rename_count)
284
161
raise AvahiServiceError("Too many renames")
285
self.name = str(self.server
286
.GetAlternativeServiceName(self.name))
287
self.rename_count += 1
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
288
163
logger.info("Changing Zeroconf service name to %r ...",
289
164
self.name)
290
if remove:
291
self.remove()
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
292
170
try:
293
171
self.add()
294
172
except dbus.exceptions.DBusException as error:
295
if (error.get_dbus_name()
296
== "org.freedesktop.Avahi.CollisionError"):
297
logger.info("Local Zeroconf service name collision.")
298
return self.rename(remove=False)
299
else:
300
logger.critical("D-Bus Exception", exc_info=error)
301
self.cleanup()
302
os._exit(1)
303
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
304
177
def remove(self):
305
178
"""Derived from the Avahi example code"""
306
179
if self.entry_group_state_changed_match is not None:
308
181
self.entry_group_state_changed_match = None
309
182
if self.group is not None:
310
183
self.group.Reset()
311
312
184
def add(self):
313
185
"""Derived from the Avahi example code"""
314
186
self.remove()
319
191
avahi.DBUS_INTERFACE_ENTRY_GROUP)
320
192
self.entry_group_state_changed_match = (
321
193
self.group.connect_to_signal(
322
'StateChanged', self.entry_group_state_changed))
194
'StateChanged', self .entry_group_state_changed))
323
195
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
324
196
self.name, self.type)
325
197
self.group.AddService(
331
203
dbus.UInt16(self.port),
332
204
avahi.string_array_to_txt_array(self.TXT))
333
205
self.group.Commit()
334
335
206
def entry_group_state_changed(self, state, error):
336
207
"""Derived from the Avahi example code"""
337
208
logger.debug("Avahi entry group state change: %i", state)
343
214
self.rename()
344
215
elif state == avahi.ENTRY_GROUP_FAILURE:
345
216
logger.critical("Avahi: Error in group state changed %s",
346
str(error))
347
raise AvahiGroupError("State changed: {!s}"
348
.format(error))
349
217
unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
350
220
def cleanup(self):
351
221
"""Derived from the Avahi example code"""
352
222
if self.group is not None:
353
223
try:
354
224
self.group.Free()
355
225
except (dbus.exceptions.UnknownMethodException,
356
dbus.exceptions.DBusException):
226
dbus.exceptions.DBusException) as e:
357
227
pass
358
228
self.group = None
359
229
self.remove()
360
361
230
def server_state_changed(self, state, error=None):
362
231
"""Derived from the Avahi example code"""
363
232
logger.debug("Avahi server state change: %i", state)
382
251
logger.debug("Unknown state: %r", state)
383
252
else:
384
253
logger.debug("Unknown state: %r: %r", state, error)
385
386
254
def activate(self):
387
255
"""Derived from the Avahi example code"""
388
256
if self.server is None:
396
264
self.server_state_changed(self.server.GetState())
397
265
398
266
399
class AvahiServiceToSyslog(AvahiService):
400
def rename(self, *args, **kwargs):
401
"""Add the new name to the syslog messages"""
402
ret = AvahiService.rename(self, *args, **kwargs)
403
syslogger.setFormatter(logging.Formatter
404
('Mandos ({}) [%(process)d]:'
405
' %(levelname)s: %(message)s'
406
.format(self.name)))
407
return ret
408
409
410
267
class Client(object):
411
268
"""A representation of a client host served by this server.
412
269
413
270
Attributes:
414
approved: bool(); 'None' if not yet approved/disapproved
271
_approved: bool(); 'None' if not yet approved/disapproved
415
272
approval_delay: datetime.timedelta(); Time to wait for approval
416
273
approval_duration: datetime.timedelta(); Duration of one approval
417
274
checker: subprocess.Popen(); a running checker process used
424
281
instance %(name)s can be used in the command.
425
282
checker_initiator_tag: a gobject event source tag, or None
426
283
created: datetime.datetime(); (UTC) object creation
427
client_structure: Object describing what attributes a client has
428
and is used for storing the client at exit
429
284
current_checker_command: string; current running checker_command
285
disable_hook: If set, called by disable() as disable_hook(self)
430
286
disable_initiator_tag: a gobject event source tag, or None
431
287
enabled: bool()
432
288
fingerprint: string (40 or 32 hexadecimal digits); used to
435
291
interval: datetime.timedelta(); How often to start a new checker
436
292
last_approval_request: datetime.datetime(); (UTC) or None
437
293
last_checked_ok: datetime.datetime(); (UTC) or None
438
last_checker_status: integer between 0 and 255 reflecting exit
439
status of last checker. -1 reflects crashed
440
checker, -2 means no checker completed yet.
441
last_enabled: datetime.datetime(); (UTC) or None
294
last_enabled: datetime.datetime(); (UTC)
442
295
name: string; from the config file, used in log messages and
443
296
D-Bus identifiers
444
297
secret: bytestring; sent verbatim (over TLS) to client
445
298
timeout: datetime.timedelta(); How long from last_checked_ok
446
299
until this client is disabled
447
extended_timeout: extra long timeout when secret has been sent
300
extended_timeout: extra long timeout when password has been sent
448
301
runtime_expansions: Allowed attributes for runtime expansion.
449
302
expires: datetime.datetime(); time (UTC) when a client will be
450
303
disabled, or None
451
server_settings: The server_settings dict from main()
452
304
"""
453
305
454
306
runtime_expansions = ("approval_delay", "approval_duration",
455
"created", "enabled", "expires",
456
"fingerprint", "host", "interval",
457
"last_approval_request", "last_checked_ok",
307
"created", "enabled", "fingerprint",
308
"host", "interval", "last_checked_ok",
458
309
"last_enabled", "name", "timeout")
459
client_defaults = { "timeout": "PT5M",
460
"extended_timeout": "PT15M",
461
"interval": "PT2M",
462
"checker": "fping -q -- %%(host)s",
463
"host": "",
464
"approval_delay": "PT0S",
465
"approval_duration": "PT1S",
466
"approved_by_default": "True",
467
"enabled": "True",
468
}
469
310
470
311
@staticmethod
471
def config_parser(config):
472
"""Construct a new dict of client settings of this form:
473
{ client_name: {setting_name: value, ...}, ...}
474
with exceptions for any special settings as defined above.
475
NOTE: Must be a pure function. Must return the same result
476
value given the same arguments.
477
"""
478
settings = {}
479
for client_name in config.sections():
480
section = dict(config.items(client_name))
481
client = settings[client_name] = {}
482
483
client["host"] = section["host"]
484
# Reformat values from string types to Python types
485
client["approved_by_default"] = config.getboolean(
486
client_name, "approved_by_default")
487
client["enabled"] = config.getboolean(client_name,
488
"enabled")
489
490
# Uppercase and remove spaces from fingerprint for later
491
# comparison purposes with return value from the
492
# fingerprint() function
493
client["fingerprint"] = (section["fingerprint"].upper()
494
.replace(" ", ""))
495
if "secret" in section:
496
client["secret"] = section["secret"].decode("base64")
497
elif "secfile" in section:
498
with open(os.path.expanduser(os.path.expandvars
499
(section["secfile"])),
500
"rb") as secfile:
501
client["secret"] = secfile.read()
502
else:
503
raise TypeError("No secret or secfile for section {}"
504
.format(section))
505
client["timeout"] = string_to_delta(section["timeout"])
506
client["extended_timeout"] = string_to_delta(
507
section["extended_timeout"])
508
client["interval"] = string_to_delta(section["interval"])
509
client["approval_delay"] = string_to_delta(
510
section["approval_delay"])
511
client["approval_duration"] = string_to_delta(
512
section["approval_duration"])
513
client["checker_command"] = section["checker"]
514
client["last_approval_request"] = None
515
client["last_checked_ok"] = None
516
client["last_checker_status"] = -2
517
518
return settings
519
520
def __init__(self, settings, name = None, server_settings=None):
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."""
521
337
self.name = name
522
if server_settings is None:
523
server_settings = {}
524
self.server_settings = server_settings
525
# adding all client settings
526
for setting, value in settings.items():
527
setattr(self, setting, value)
528
529
if self.enabled:
530
if not hasattr(self, "last_enabled"):
531
self.last_enabled = datetime.datetime.utcnow()
532
if not hasattr(self, "expires"):
533
self.expires = (datetime.datetime.utcnow()
534
+ self.timeout)
535
else:
536
self.last_enabled = None
537
self.expires = None
538
338
if config is None:
339
config = {}
539
340
logger.debug("Creating client %r", self.name)
341
# Uppercase and remove spaces from fingerprint for later
342
# comparison purposes with return value from the fingerprint()
343
# function
344
self.fingerprint = (config["fingerprint"].upper()
345
.replace(" ", ""))
540
346
logger.debug(" Fingerprint: %s", self.fingerprint)
541
self.created = settings.get("created",
542
datetime.datetime.utcnow())
543
544
# 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
545
367
self.checker = None
546
368
self.checker_initiator_tag = None
547
369
self.disable_initiator_tag = None
370
self.expires = None
548
371
self.checker_callback_tag = None
372
self.checker_command = config["checker"]
549
373
self.current_checker_command = None
550
self.approved = None
374
self.last_connect = None
375
self._approved = None
376
self.approved_by_default = config.get("approved_by_default",
377
True)
551
378
self.approvals_pending = 0
552
self.changedstate = (multiprocessing_manager
553
.Condition(multiprocessing_manager
554
.Lock()))
555
self.client_structure = [attr for attr in
556
self.__dict__.iterkeys()
557
if not attr.startswith("_")]
558
self.client_structure.append("client_structure")
559
560
for name, t in inspect.getmembers(type(self),
561
lambda obj:
562
isinstance(obj,
563
property)):
564
if not name.startswith("_"):
565
self.client_structure.append(name)
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())
566
384
567
# Send notice to process children that client state has changed
568
385
def send_changedstate(self):
569
with self.changedstate:
570
self.changedstate.notify_all()
571
386
self.changedstate.acquire()
387
self.changedstate.notify_all()
388
self.changedstate.release()
389
572
390
def enable(self):
573
391
"""Start this client's checker and timeout hooks"""
574
392
if getattr(self, "enabled", False):
575
393
# Already enabled
576
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
577
403
self.expires = datetime.datetime.utcnow() + self.timeout
404
self.disable_initiator_tag = (gobject.timeout_add
405
(self.timeout_milliseconds(),
406
self.disable))
578
407
self.enabled = True
579
self.last_enabled = datetime.datetime.utcnow()
580
self.init_checker()
581
self.send_changedstate()
408
# Also start a new checker *right now*.
409
self.start_checker()
582
410
583
411
def disable(self, quiet=True):
584
412
"""Disable this client."""
585
413
if not getattr(self, "enabled", False):
586
414
return False
587
415
if not quiet:
416
self.send_changedstate()
417
if not quiet:
588
418
logger.info("Disabling client %s", self.name)
589
if getattr(self, "disable_initiator_tag", None) is not None:
419
if getattr(self, "disable_initiator_tag", False):
590
420
gobject.source_remove(self.disable_initiator_tag)
591
421
self.disable_initiator_tag = None
592
422
self.expires = None
593
if getattr(self, "checker_initiator_tag", None) is not None:
423
if getattr(self, "checker_initiator_tag", False):
594
424
gobject.source_remove(self.checker_initiator_tag)
595
425
self.checker_initiator_tag = None
596
426
self.stop_checker()
427
if self.disable_hook:
428
self.disable_hook(self)
597
429
self.enabled = False
598
if not quiet:
599
self.send_changedstate()
600
430
# Do not run this again if called by a gobject.timeout_add
601
431
return False
602
432
603
433
def __del__(self):
434
self.disable_hook = None
604
435
self.disable()
605
436
606
def init_checker(self):
607
# Schedule a new checker to be started an 'interval' from now,
608
# and every interval from then on.
609
if self.checker_initiator_tag is not None:
610
gobject.source_remove(self.checker_initiator_tag)
611
self.checker_initiator_tag = (gobject.timeout_add
612
(int(self.interval
613
.total_seconds() * 1000),
614
self.start_checker))
615
# Schedule a disable() when 'timeout' has passed
616
if self.disable_initiator_tag is not None:
617
gobject.source_remove(self.disable_initiator_tag)
618
self.disable_initiator_tag = (gobject.timeout_add
619
(int(self.timeout
620
.total_seconds() * 1000),
621
self.disable))
622
# Also start a new checker *right now*.
623
self.start_checker()
624
625
437
def checker_callback(self, pid, condition, command):
626
438
"""The checker has completed, so take appropriate actions."""
627
439
self.checker_callback_tag = None
628
440
self.checker = None
629
441
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
631
if self.last_checker_status == 0:
442
exitstatus = os.WEXITSTATUS(condition)
443
if exitstatus == 0:
632
444
logger.info("Checker for %(name)s succeeded",
633
445
vars(self))
634
446
self.checked_ok()
636
448
logger.info("Checker for %(name)s failed",
637
449
vars(self))
638
450
else:
639
self.last_checker_status = -1
640
451
logger.warning("Checker for %(name)s crashed?",
641
452
vars(self))
642
453
643
def checked_ok(self):
644
"""Assert that the client has been seen, alive and well."""
645
self.last_checked_ok = datetime.datetime.utcnow()
646
self.last_checker_status = 0
647
self.bump_timeout()
648
649
def bump_timeout(self, timeout=None):
650
"""Bump up the timeout for this client."""
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
"""
651
460
if timeout is None:
652
461
timeout = self.timeout
653
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = None
656
if getattr(self, "enabled", False):
657
self.disable_initiator_tag = (gobject.timeout_add
658
(int(timeout.total_seconds()
659
* 1000), self.disable))
660
self.expires = datetime.datetime.utcnow() + timeout
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))
661
468
662
469
def need_approval(self):
663
470
self.last_approval_request = datetime.datetime.utcnow()
668
475
If a checker already exists, leave it running and do
669
476
nothing."""
670
477
# The reason for not killing a running checker is that if we
671
# did that, and if a checker (for some reason) started running
672
# slowly and taking more than 'interval' time, then the client
673
# would inevitably timeout, since no checker would get a
674
# chance to run to completion. If we instead leave running
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
675
482
# checkers alone, the checker would have to take more time
676
483
# than 'timeout' for the client to be disabled, which is as it
677
484
# should be.
679
486
# If a checker exists, make sure it is not a zombie
680
487
try:
681
488
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
except AttributeError:
683
pass
684
except OSError as error:
685
if error.errno != errno.ECHILD:
686
raise
489
except (AttributeError, OSError) as error:
490
if (isinstance(error, OSError)
491
and error.errno != errno.ECHILD):
492
raise error
687
493
else:
688
494
if pid:
689
495
logger.warning("Checker was a zombie")
692
498
self.current_checker_command)
693
499
# Start a new checker if needed
694
500
if self.checker is None:
695
# Escape attributes for the shell
696
escaped_attrs = { attr:
697
re.escape(str(getattr(self, attr)))
698
for attr in self.runtime_expansions }
699
501
try:
700
command = self.checker_command % escaped_attrs
701
except TypeError as error:
702
logger.error('Could not format string "%s"',
703
self.checker_command, exc_info=error)
704
return True # Try again later
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
705
520
self.current_checker_command = command
706
521
try:
707
522
logger.info("Starting checker %r for %s",
710
525
# in normal mode, that is already done by daemon(),
711
526
# and in debug mode we don't want to. (Stdin is
712
527
# always replaced by /dev/null.)
713
# The exception is when not debugging but nevertheless
714
# running in the foreground; use the previously
715
# created wnull.
716
popen_args = {}
717
if (not self.server_settings["debug"]
718
and self.server_settings["foreground"]):
719
popen_args.update({"stdout": wnull,
720
"stderr": wnull })
721
528
self.checker = subprocess.Popen(command,
722
529
close_fds=True,
723
shell=True, cwd="/",
724
**popen_args)
725
except OSError as error:
726
logger.error("Failed to start subprocess",
727
exc_info=error)
728
return True
729
self.checker_callback_tag = (gobject.child_watch_add
730
(self.checker.pid,
731
self.checker_callback,
732
data=command))
733
# The checker may have completed before the gobject
734
# watch was added. Check for this.
735
try:
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.
736
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)
737
541
except OSError as error:
738
if error.errno == errno.ECHILD:
739
# This should never happen
740
logger.error("Child process vanished",
741
exc_info=error)
742
return True
743
raise
744
if pid:
745
gobject.source_remove(self.checker_callback_tag)
746
self.checker_callback(pid, status, command)
542
logger.error("Failed to start subprocess: %s",
543
error)
747
544
# Re-run this periodically if run by gobject.timeout_add
748
545
return True
749
546
756
553
return
757
554
logger.debug("Stopping checker for %(name)s", vars(self))
758
555
try:
759
self.checker.terminate()
556
os.kill(self.checker.pid, signal.SIGTERM)
760
557
#time.sleep(0.5)
761
558
#if self.checker.poll() is None:
762
# self.checker.kill()
559
# os.kill(self.checker.pid, signal.SIGKILL)
763
560
except OSError as error:
764
561
if error.errno != errno.ESRCH: # No such process
765
562
raise
766
563
self.checker = None
767
564
768
769
565
def dbus_service_property(dbus_interface, signature="v",
770
566
access="readwrite", byte_arrays=False):
771
567
"""Decorators for marking methods of a DBusObjectWithProperties to
782
578
# "Set" method, so we fail early here:
783
579
if byte_arrays and signature != "ay":
784
580
raise ValueError("Byte arrays not supported for non-'ay'"
785
" signature {!r}".format(signature))
581
" signature %r" % signature)
786
582
def decorator(func):
787
583
func._dbus_is_property = True
788
584
func._dbus_interface = dbus_interface
796
592
return decorator
797
593
798
594
799
def dbus_interface_annotations(dbus_interface):
800
"""Decorator for marking functions returning interface annotations
801
802
Usage:
803
804
@dbus_interface_annotations("org.example.Interface")
805
def _foo(self): # Function name does not matter
806
return {"org.freedesktop.DBus.Deprecated": "true",
807
"org.freedesktop.DBus.Property.EmitsChangedSignal":
808
"false"}
809
"""
810
def decorator(func):
811
func._dbus_is_interface = True
812
func._dbus_interface = dbus_interface
813
func._dbus_name = dbus_interface
814
return func
815
return decorator
816
817
818
def dbus_annotations(annotations):
819
"""Decorator to annotate D-Bus methods, signals or properties
820
Usage:
821
822
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
823
"org.freedesktop.DBus.Property."
824
"EmitsChangedSignal": "false"})
825
@dbus_service_property("org.example.Interface", signature="b",
826
access="r")
827
def Property_dbus_property(self):
828
return dbus.Boolean(False)
829
"""
830
def decorator(func):
831
func._dbus_annotations = annotations
832
return func
833
return decorator
834
835
836
595
class DBusPropertyException(dbus.exceptions.DBusException):
837
596
"""A base class for D-Bus property-related exceptions
838
597
"""
839
pass
598
def __unicode__(self):
599
return unicode(str(self))
600
840
601
841
602
class DBusPropertyAccessException(DBusPropertyException):
842
603
"""A property's access permissions disallows an operation.
852
613
853
614
class DBusObjectWithProperties(dbus.service.Object):
854
615
"""A D-Bus object with properties.
855
616
856
617
Classes inheriting from this can use the dbus_service_property
857
618
decorator to expose methods as D-Bus properties. It exposes the
858
619
standard Get(), Set(), and GetAll() methods on the D-Bus.
859
620
"""
860
621
861
622
@staticmethod
862
def _is_dbus_thing(thing):
863
"""Returns a function testing if an attribute is a D-Bus thing
864
865
If called like _is_dbus_thing("method") it returns a function
866
suitable for use as predicate to inspect.getmembers().
867
"""
868
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
869
False)
623
def _is_dbus_property(obj):
624
return getattr(obj, "_dbus_is_property", False)
870
625
871
def _get_all_dbus_things(self, thing):
626
def _get_all_dbus_properties(self):
872
627
"""Returns a generator of (name, attribute) pairs
873
628
"""
874
return ((getattr(athing.__get__(self), "_dbus_name",
875
name),
876
athing.__get__(self))
877
for cls in self.__class__.__mro__
878
for name, athing in
879
inspect.getmembers(cls,
880
self._is_dbus_thing(thing)))
629
return ((prop._dbus_name, prop)
630
for name, prop in
631
inspect.getmembers(self, self._is_dbus_property))
881
632
882
633
def _get_dbus_property(self, interface_name, property_name):
883
634
"""Returns a bound method if one exists which is a D-Bus
884
635
property with the specified name and interface.
885
636
"""
886
for cls in self.__class__.__mro__:
887
for name, value in (inspect.getmembers
888
(cls,
889
self._is_dbus_thing("property"))):
890
if (value._dbus_name == property_name
891
and value._dbus_interface == interface_name):
892
return value.__get__(self)
893
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
894
647
# No such property
895
648
raise DBusPropertyNotFound(self.dbus_object_path + ":"
896
649
+ interface_name + "."
920
673
# The byte_arrays option is not supported yet on
921
674
# signatures other than "ay".
922
675
if prop._dbus_signature != "ay":
923
raise ValueError("Byte arrays not supported for non-"
924
"'ay' signature {!r}"
925
.format(prop._dbus_signature))
926
value = dbus.ByteArray(b''.join(chr(byte)
927
for byte in value))
676
raise ValueError
677
value = dbus.ByteArray(''.join(unichr(byte)
678
for byte in value))
928
679
prop(value)
929
680
930
681
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
932
683
def GetAll(self, interface_name):
933
684
"""Standard D-Bus property GetAll() method, see D-Bus
934
685
standard.
935
686
936
687
Note: Will not include properties with access="write".
937
688
"""
938
properties = {}
939
for name, prop in self._get_all_dbus_things("property"):
689
all = {}
690
for name, prop in self._get_all_dbus_properties():
940
691
if (interface_name
941
692
and interface_name != prop._dbus_interface):
942
693
# Interface non-empty but did not match
946
697
continue
947
698
value = prop()
948
699
if not hasattr(value, "variant_level"):
949
properties[name] = value
700
all[name] = value
950
701
continue
951
properties[name] = type(value)(value, variant_level=
952
value.variant_level+1)
953
return dbus.Dictionary(properties, signature="sv")
954
955
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
956
def PropertiesChanged(self, interface_name, changed_properties,
957
invalidated_properties):
958
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
959
standard.
960
"""
961
pass
702
all[name] = type(value)(value, variant_level=
703
value.variant_level+1)
704
return dbus.Dictionary(all, signature="sv")
962
705
963
706
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
964
707
out_signature="s",
965
708
path_keyword='object_path',
966
709
connection_keyword='connection')
967
710
def Introspect(self, object_path, connection):
968
"""Overloading of standard D-Bus method.
969
970
Inserts property tags and interface annotation tags.
711
"""Standard D-Bus method, overloaded to insert property tags.
971
712
"""
972
713
xmlstring = dbus.service.Object.Introspect(self, object_path,
973
714
connection)
980
721
e.setAttribute("access", prop._dbus_access)
981
722
return e
982
723
for if_tag in document.getElementsByTagName("interface"):
983
# Add property tags
984
724
for tag in (make_tag(document, name, prop)
985
725
for name, prop
986
in self._get_all_dbus_things("property")
726
in self._get_all_dbus_properties()
987
727
if prop._dbus_interface
988
728
== if_tag.getAttribute("name")):
989
729
if_tag.appendChild(tag)
990
# Add annotation tags
991
for typ in ("method", "signal", "property"):
992
for tag in if_tag.getElementsByTagName(typ):
993
annots = dict()
994
for name, prop in (self.
995
_get_all_dbus_things(typ)):
996
if (name == tag.getAttribute("name")
997
and prop._dbus_interface
998
== if_tag.getAttribute("name")):
999
annots.update(getattr
1000
(prop,
1001
"_dbus_annotations",
1002
{}))
1003
for name, value in annots.items():
1004
ann_tag = document.createElement(
1005
"annotation")
1006
ann_tag.setAttribute("name", name)
1007
ann_tag.setAttribute("value", value)
1008
tag.appendChild(ann_tag)
1009
# Add interface annotation tags
1010
for annotation, value in dict(
1011
itertools.chain.from_iterable(
1012
annotations().items()
1013
for name, annotations in
1014
self._get_all_dbus_things("interface")
1015
if name == if_tag.getAttribute("name")
1016
)).items():
1017
ann_tag = document.createElement("annotation")
1018
ann_tag.setAttribute("name", annotation)
1019
ann_tag.setAttribute("value", value)
1020
if_tag.appendChild(ann_tag)
1021
730
# Add the names to the return values for the
1022
731
# "org.freedesktop.DBus.Properties" methods
1023
732
if (if_tag.getAttribute("name")
1038
747
except (AttributeError, xml.dom.DOMException,
1039
748
xml.parsers.expat.ExpatError) as error:
1040
749
logger.error("Failed to override Introspection method",
1041
exc_info=error)
750
error)
1042
751
return xmlstring
1043
752
1044
753
1045
def datetime_to_dbus(dt, variant_level=0):
1046
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1047
if dt is None:
1048
return dbus.String("", variant_level = variant_level)
1049
return dbus.String(dt.isoformat(),
1050
variant_level=variant_level)
1051
1052
1053
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1054
"""A class decorator; applied to a subclass of
1055
dbus.service.Object, it will add alternate D-Bus attributes with
1056
interface names according to the "alt_interface_names" mapping.
1057
Usage:
1058
1059
@alternate_dbus_interfaces({"org.example.Interface":
1060
"net.example.AlternateInterface"})
1061
class SampleDBusObject(dbus.service.Object):
1062
@dbus.service.method("org.example.Interface")
1063
def SampleDBusMethod():
1064
pass
1065
1066
The above "SampleDBusMethod" on "SampleDBusObject" will be
1067
reachable via two interfaces: "org.example.Interface" and
1068
"net.example.AlternateInterface", the latter of which will have
1069
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1070
"true", unless "deprecate" is passed with a False value.
1071
1072
This works for methods and signals, and also for D-Bus properties
1073
(from DBusObjectWithProperties) and interfaces (from the
1074
dbus_interface_annotations decorator).
1075
"""
1076
def wrapper(cls):
1077
for orig_interface_name, alt_interface_name in (
1078
alt_interface_names.items()):
1079
attr = {}
1080
interface_names = set()
1081
# Go though all attributes of the class
1082
for attrname, attribute in inspect.getmembers(cls):
1083
# Ignore non-D-Bus attributes, and D-Bus attributes
1084
# with the wrong interface name
1085
if (not hasattr(attribute, "_dbus_interface")
1086
or not attribute._dbus_interface
1087
.startswith(orig_interface_name)):
1088
continue
1089
# Create an alternate D-Bus interface name based on
1090
# the current name
1091
alt_interface = (attribute._dbus_interface
1092
.replace(orig_interface_name,
1093
alt_interface_name))
1094
interface_names.add(alt_interface)
1095
# Is this a D-Bus signal?
1096
if getattr(attribute, "_dbus_is_signal", False):
1097
# Extract the original non-method undecorated
1098
# function by black magic
1099
nonmethod_func = (dict(
1100
zip(attribute.func_code.co_freevars,
1101
attribute.__closure__))["func"]
1102
.cell_contents)
1103
# Create a new, but exactly alike, function
1104
# object, and decorate it to be a new D-Bus signal
1105
# with the alternate D-Bus interface name
1106
new_function = (dbus.service.signal
1107
(alt_interface,
1108
attribute._dbus_signature)
1109
(types.FunctionType(
1110
nonmethod_func.func_code,
1111
nonmethod_func.func_globals,
1112
nonmethod_func.func_name,
1113
nonmethod_func.func_defaults,
1114
nonmethod_func.func_closure)))
1115
# Copy annotations, if any
1116
try:
1117
new_function._dbus_annotations = (
1118
dict(attribute._dbus_annotations))
1119
except AttributeError:
1120
pass
1121
# Define a creator of a function to call both the
1122
# original and alternate functions, so both the
1123
# original and alternate signals gets sent when
1124
# the function is called
1125
def fixscope(func1, func2):
1126
"""This function is a scope container to pass
1127
func1 and func2 to the "call_both" function
1128
outside of its arguments"""
1129
def call_both(*args, **kwargs):
1130
"""This function will emit two D-Bus
1131
signals by calling func1 and func2"""
1132
func1(*args, **kwargs)
1133
func2(*args, **kwargs)
1134
return call_both
1135
# Create the "call_both" function and add it to
1136
# the class
1137
attr[attrname] = fixscope(attribute, new_function)
1138
# Is this a D-Bus method?
1139
elif getattr(attribute, "_dbus_is_method", False):
1140
# Create a new, but exactly alike, function
1141
# object. Decorate it to be a new D-Bus method
1142
# with the alternate D-Bus interface name. Add it
1143
# to the class.
1144
attr[attrname] = (dbus.service.method
1145
(alt_interface,
1146
attribute._dbus_in_signature,
1147
attribute._dbus_out_signature)
1148
(types.FunctionType
1149
(attribute.func_code,
1150
attribute.func_globals,
1151
attribute.func_name,
1152
attribute.func_defaults,
1153
attribute.func_closure)))
1154
# Copy annotations, if any
1155
try:
1156
attr[attrname]._dbus_annotations = (
1157
dict(attribute._dbus_annotations))
1158
except AttributeError:
1159
pass
1160
# Is this a D-Bus property?
1161
elif getattr(attribute, "_dbus_is_property", False):
1162
# Create a new, but exactly alike, function
1163
# object, and decorate it to be a new D-Bus
1164
# property with the alternate D-Bus interface
1165
# name. Add it to the class.
1166
attr[attrname] = (dbus_service_property
1167
(alt_interface,
1168
attribute._dbus_signature,
1169
attribute._dbus_access,
1170
attribute
1171
._dbus_get_args_options
1172
["byte_arrays"])
1173
(types.FunctionType
1174
(attribute.func_code,
1175
attribute.func_globals,
1176
attribute.func_name,
1177
attribute.func_defaults,
1178
attribute.func_closure)))
1179
# Copy annotations, if any
1180
try:
1181
attr[attrname]._dbus_annotations = (
1182
dict(attribute._dbus_annotations))
1183
except AttributeError:
1184
pass
1185
# Is this a D-Bus interface?
1186
elif getattr(attribute, "_dbus_is_interface", False):
1187
# Create a new, but exactly alike, function
1188
# object. Decorate it to be a new D-Bus interface
1189
# with the alternate D-Bus interface name. Add it
1190
# to the class.
1191
attr[attrname] = (dbus_interface_annotations
1192
(alt_interface)
1193
(types.FunctionType
1194
(attribute.func_code,
1195
attribute.func_globals,
1196
attribute.func_name,
1197
attribute.func_defaults,
1198
attribute.func_closure)))
1199
if deprecate:
1200
# Deprecate all alternate interfaces
1201
iname="_AlternateDBusNames_interface_annotation{}"
1202
for interface_name in interface_names:
1203
@dbus_interface_annotations(interface_name)
1204
def func(self):
1205
return { "org.freedesktop.DBus.Deprecated":
1206
"true" }
1207
# Find an unused name
1208
for aname in (iname.format(i)
1209
for i in itertools.count()):
1210
if aname not in attr:
1211
attr[aname] = func
1212
break
1213
if interface_names:
1214
# Replace the class with a new subclass of it with
1215
# methods, signals, etc. as created above.
1216
cls = type(b"{}Alternate".format(cls.__name__),
1217
(cls,), attr)
1218
return cls
1219
return wrapper
1220
1221
1222
@alternate_dbus_interfaces({"se.recompile.Mandos":
1223
"se.bsnet.fukt.Mandos"})
1224
754
class ClientDBus(Client, DBusObjectWithProperties):
1225
755
"""A Client class using D-Bus
1226
756
1232
762
runtime_expansions = (Client.runtime_expansions
1233
763
+ ("dbus_object_path",))
1234
764
1235
_interface = "se.recompile.Mandos.Client"
1236
1237
765
# dbus.service.Object doesn't use super(), so we can't either.
1238
766
1239
767
def __init__(self, bus = None, *args, **kwargs):
768
self._approvals_pending = 0
1240
769
self.bus = bus
1241
770
Client.__init__(self, *args, **kwargs)
1242
771
# Only now, when this client is initialized, can it show up on
1243
772
# the D-Bus
1244
client_object_name = str(self.name).translate(
773
client_object_name = unicode(self.name).translate(
1245
774
{ord("."): ord("_"),
1246
775
ord("-"): ord("_")})
1247
776
self.dbus_object_path = (dbus.ObjectPath
1248
777
("/clients/" + client_object_name))
1249
778
DBusObjectWithProperties.__init__(self, self.bus,
1250
779
self.dbus_object_path)
1251
1252
def notifychangeproperty(transform_func,
1253
dbus_name, type_func=lambda x: x,
1254
variant_level=1, invalidate_only=False,
1255
_interface=_interface):
1256
""" Modify a variable so that it's a property which announces
1257
its changes to DBus.
1258
1259
transform_fun: Function that takes a value and a variant_level
1260
and transforms it to a D-Bus type.
1261
dbus_name: D-Bus name of the variable
1262
type_func: Function that transform the value before sending it
1263
to the D-Bus. Default: no transform
1264
variant_level: D-Bus variant level. Default: 1
1265
"""
1266
attrname = "_{}".format(dbus_name)
1267
def setter(self, value):
1268
if hasattr(self, "dbus_object_path"):
1269
if (not hasattr(self, attrname) or
1270
type_func(getattr(self, attrname, None))
1271
!= type_func(value)):
1272
if invalidate_only:
1273
self.PropertiesChanged(_interface,
1274
dbus.Dictionary(),
1275
dbus.Array
1276
((dbus_name,)))
1277
else:
1278
dbus_value = transform_func(type_func(value),
1279
variant_level
1280
=variant_level)
1281
self.PropertyChanged(dbus.String(dbus_name),
1282
dbus_value)
1283
self.PropertiesChanged(_interface,
1284
dbus.Dictionary({
1285
dbus.String(dbus_name):
1286
dbus_value }), dbus.Array())
1287
setattr(self, attrname, value)
1288
1289
return property(lambda self: getattr(self, attrname), setter)
1290
1291
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1292
approvals_pending = notifychangeproperty(dbus.Boolean,
1293
"ApprovalPending",
1294
type_func = bool)
1295
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1296
last_enabled = notifychangeproperty(datetime_to_dbus,
1297
"LastEnabled")
1298
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1299
type_func = lambda checker:
1300
checker is not None)
1301
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1302
"LastCheckedOK")
1303
last_checker_status = notifychangeproperty(dbus.Int16,
1304
"LastCheckerStatus")
1305
last_approval_request = notifychangeproperty(
1306
datetime_to_dbus, "LastApprovalRequest")
1307
approved_by_default = notifychangeproperty(dbus.Boolean,
1308
"ApprovedByDefault")
1309
approval_delay = notifychangeproperty(dbus.UInt64,
1310
"ApprovalDelay",
1311
type_func =
1312
lambda td: td.total_seconds()
1313
* 1000)
1314
approval_duration = notifychangeproperty(
1315
dbus.UInt64, "ApprovalDuration",
1316
type_func = lambda td: td.total_seconds() * 1000)
1317
host = notifychangeproperty(dbus.String, "Host")
1318
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1319
type_func = lambda td:
1320
td.total_seconds() * 1000)
1321
extended_timeout = notifychangeproperty(
1322
dbus.UInt64, "ExtendedTimeout",
1323
type_func = lambda td: td.total_seconds() * 1000)
1324
interval = notifychangeproperty(dbus.UInt64,
1325
"Interval",
1326
type_func =
1327
lambda td: td.total_seconds()
1328
* 1000)
1329
checker_command = notifychangeproperty(dbus.String, "Checker")
1330
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1331
invalidate_only=True)
1332
1333
del notifychangeproperty
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
1334
836
1335
837
def __del__(self, *args, **kwargs):
1336
838
try:
1345
847
*args, **kwargs):
1346
848
self.checker_callback_tag = None
1347
849
self.checker = None
850
# Emit D-Bus signal
851
self.PropertyChanged(dbus.String("CheckerRunning"),
852
dbus.Boolean(False, variant_level=1))
1348
853
if os.WIFEXITED(condition):
1349
854
exitstatus = os.WEXITSTATUS(condition)
1350
855
# Emit D-Bus signal
1360
865
return Client.checker_callback(self, pid, condition, command,
1361
866
*args, **kwargs)
1362
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
1363
885
def start_checker(self, *args, **kwargs):
1364
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
1365
891
r = Client.start_checker(self, *args, **kwargs)
1366
892
# Only if new checker process was started
1367
893
if (self.checker is not None
1368
894
and old_checker_pid != self.checker.pid):
1369
895
# Emit D-Bus signal
1370
896
self.CheckerStarted(self.current_checker_command)
897
self.PropertyChanged(
898
dbus.String("CheckerRunning"),
899
dbus.Boolean(True, variant_level=1))
1371
900
return r
1372
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
1373
911
def _reset_approved(self):
1374
self.approved = None
912
self._approved = None
1375
913
return False
1376
914
1377
915
def approve(self, value=True):
1378
self.approved = value
1379
gobject.timeout_add(int(self.approval_duration.total_seconds()
1380
* 1000), self._reset_approved)
1381
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
1382
922
1383
923
## D-Bus methods, signals & properties
1384
1385
## Interfaces
924
_interface = "se.bsnet.fukt.Mandos.Client"
1386
925
1387
926
## Signals
1388
927
1399
938
pass
1400
939
1401
940
# PropertyChanged - signal
1402
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1403
941
@dbus.service.signal(_interface, signature="sv")
1404
942
def PropertyChanged(self, property, value):
1405
943
"D-Bus signal"
1474
1012
def ApprovedByDefault_dbus_property(self, value=None):
1475
1013
if value is None: # get
1476
1014
return dbus.Boolean(self.approved_by_default)
1015
old_value = self.approved_by_default
1477
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))
1478
1021
1479
1022
# ApprovalDelay - property
1480
1023
@dbus_service_property(_interface, signature="t",
1481
1024
access="readwrite")
1482
1025
def ApprovalDelay_dbus_property(self, value=None):
1483
1026
if value is None: # get
1484
return dbus.UInt64(self.approval_delay.total_seconds()
1485
* 1000)
1027
return dbus.UInt64(self.approval_delay_milliseconds())
1028
old_value = self.approval_delay
1486
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))
1487
1034
1488
1035
# ApprovalDuration - property
1489
1036
@dbus_service_property(_interface, signature="t",
1490
1037
access="readwrite")
1491
1038
def ApprovalDuration_dbus_property(self, value=None):
1492
1039
if value is None: # get
1493
return dbus.UInt64(self.approval_duration.total_seconds()
1494
* 1000)
1040
return dbus.UInt64(self._timedelta_to_milliseconds(
1041
self.approval_duration))
1042
old_value = self.approval_duration
1495
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))
1496
1048
1497
1049
# Name - property
1498
1050
@dbus_service_property(_interface, signature="s", access="read")
1510
1062
def Host_dbus_property(self, value=None):
1511
1063
if value is None: # get
1512
1064
return dbus.String(self.host)
1513
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))
1514
1071
1515
1072
# Created - property
1516
1073
@dbus_service_property(_interface, signature="s", access="read")
1517
1074
def Created_dbus_property(self):
1518
return datetime_to_dbus(self.created)
1075
return dbus.String(self._datetime_to_dbus(self.created))
1519
1076
1520
1077
# LastEnabled - property
1521
1078
@dbus_service_property(_interface, signature="s", access="read")
1522
1079
def LastEnabled_dbus_property(self):
1523
return datetime_to_dbus(self.last_enabled)
1080
return self._datetime_to_dbus(self.last_enabled)
1524
1081
1525
1082
# Enabled - property
1526
1083
@dbus_service_property(_interface, signature="b",
1540
1097
if value is not None:
1541
1098
self.checked_ok()
1542
1099
return
1543
return datetime_to_dbus(self.last_checked_ok)
1544
1545
# LastCheckerStatus - property
1546
@dbus_service_property(_interface, signature="n",
1547
access="read")
1548
def LastCheckerStatus_dbus_property(self):
1549
return dbus.Int16(self.last_checker_status)
1100
return self._datetime_to_dbus(self.last_checked_ok)
1550
1101
1551
1102
# Expires - property
1552
1103
@dbus_service_property(_interface, signature="s", access="read")
1553
1104
def Expires_dbus_property(self):
1554
return datetime_to_dbus(self.expires)
1105
return self._datetime_to_dbus(self.expires)
1555
1106
1556
1107
# LastApprovalRequest - property
1557
1108
@dbus_service_property(_interface, signature="s", access="read")
1558
1109
def LastApprovalRequest_dbus_property(self):
1559
return datetime_to_dbus(self.last_approval_request)
1110
return self._datetime_to_dbus(self.last_approval_request)
1560
1111
1561
1112
# Timeout - property
1562
1113
@dbus_service_property(_interface, signature="t",
1563
1114
access="readwrite")
1564
1115
def Timeout_dbus_property(self, value=None):
1565
1116
if value is None: # get
1566
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1567
old_timeout = self.timeout
1117
return dbus.UInt64(self.timeout_milliseconds())
1118
old_value = self.timeout
1568
1119
self.timeout = datetime.timedelta(0, 0, 0, value)
1569
# Reschedule disabling
1570
if self.enabled:
1571
now = datetime.datetime.utcnow()
1572
self.expires += self.timeout - old_timeout
1573
if self.expires <= now:
1574
# The timeout has passed
1575
self.disable()
1576
else:
1577
if (getattr(self, "disable_initiator_tag", None)
1578
is None):
1579
return
1580
gobject.source_remove(self.disable_initiator_tag)
1581
self.disable_initiator_tag = (
1582
gobject.timeout_add(
1583
int((self.expires - now).total_seconds()
1584
* 1000), self.disable))
1585
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
1586
1145
# ExtendedTimeout - property
1587
1146
@dbus_service_property(_interface, signature="t",
1588
1147
access="readwrite")
1589
1148
def ExtendedTimeout_dbus_property(self, value=None):
1590
1149
if value is None: # get
1591
return dbus.UInt64(self.extended_timeout.total_seconds()
1592
* 1000)
1150
return dbus.UInt64(self.extended_timeout_milliseconds())
1151
old_value = self.extended_timeout
1593
1152
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1594
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
1595
1158
# Interval - property
1596
1159
@dbus_service_property(_interface, signature="t",
1597
1160
access="readwrite")
1598
1161
def Interval_dbus_property(self, value=None):
1599
1162
if value is None: # get
1600
return dbus.UInt64(self.interval.total_seconds() * 1000)
1163
return dbus.UInt64(self.interval_milliseconds())
1164
old_value = self.interval
1601
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))
1602
1170
if getattr(self, "checker_initiator_tag", None) is None:
1603
1171
return
1604
if self.enabled:
1605
# Reschedule checker run
1606
gobject.source_remove(self.checker_initiator_tag)
1607
self.checker_initiator_tag = (gobject.timeout_add
1608
(value, self.start_checker))
1609
self.start_checker() # Start one now, too
1610
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
1611
1178
# Checker - property
1612
1179
@dbus_service_property(_interface, signature="s",
1613
1180
access="readwrite")
1614
1181
def Checker_dbus_property(self, value=None):
1615
1182
if value is None: # get
1616
1183
return dbus.String(self.checker_command)
1617
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))
1618
1191
1619
1192
# CheckerRunning - property
1620
1193
@dbus_service_property(_interface, signature="b",
1636
1209
@dbus_service_property(_interface, signature="ay",
1637
1210
access="write", byte_arrays=True)
1638
1211
def Secret_dbus_property(self, value):
1639
self.secret = bytes(value)
1212
self.secret = str(value)
1640
1213
1641
1214
del _interface
1642
1215
1647
1220
self._pipe.send(('init', fpr, address))
1648
1221
if not self._pipe.recv():
1649
1222
raise KeyError()
1650
1223
1651
1224
def __getattribute__(self, name):
1652
if name == '_pipe':
1225
if(name == '_pipe'):
1653
1226
return super(ProxyClient, self).__getattribute__(name)
1654
1227
self._pipe.send(('getattr', name))
1655
1228
data = self._pipe.recv()
1660
1233
self._pipe.send(('funcall', name, args, kwargs))
1661
1234
return self._pipe.recv()[1]
1662
1235
return func
1663
1236
1664
1237
def __setattr__(self, name, value):
1665
if name == '_pipe':
1238
if(name == '_pipe'):
1666
1239
return super(ProxyClient, self).__setattr__(name, value)
1667
1240
self._pipe.send(('setattr', name, value))
1668
1241
1676
1249
def handle(self):
1677
1250
with contextlib.closing(self.server.child_pipe) as child_pipe:
1678
1251
logger.info("TCP connection from: %s",
1679
str(self.client_address))
1252
unicode(self.client_address))
1680
1253
logger.debug("Pipe FD: %d",
1681
1254
self.server.child_pipe.fileno())
1682
1255
1683
1256
session = (gnutls.connection
1684
1257
.ClientSession(self.request,
1685
1258
gnutls.connection
1686
1259
.X509Credentials()))
1687
1260
1688
1261
# Note: gnutls.connection.X509Credentials is really a
1689
1262
# generic GnuTLS certificate credentials object so long as
1690
1263
# no X.509 keys are added to it. Therefore, we can use it
1691
1264
# here despite using OpenPGP certificates.
1692
1265
1693
1266
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1694
1267
# "+AES-256-CBC", "+SHA1",
1695
1268
# "+COMP-NULL", "+CTYPE-OPENPGP",
1701
1274
(gnutls.library.functions
1702
1275
.gnutls_priority_set_direct(session._c_object,
1703
1276
priority, None))
1704
1277
1705
1278
# Start communication using the Mandos protocol
1706
1279
# Get protocol number
1707
1280
line = self.request.makefile().readline()
1708
1281
logger.debug("Protocol version: %r", line)
1709
1282
try:
1710
1283
if int(line.strip().split()[0]) > 1:
1711
raise RuntimeError(line)
1284
raise RuntimeError
1712
1285
except (ValueError, IndexError, RuntimeError) as error:
1713
1286
logger.error("Unknown protocol version: %s", error)
1714
1287
return
1715
1288
1716
1289
# Start GnuTLS connection
1717
1290
try:
1718
1291
session.handshake()
1722
1295
# established. Just abandon the request.
1723
1296
return
1724
1297
logger.debug("Handshake succeeded")
1725
1298
1726
1299
approval_required = False
1727
1300
try:
1728
1301
try:
1733
1306
logger.warning("Bad certificate: %s", error)
1734
1307
return
1735
1308
logger.debug("Fingerprint: %s", fpr)
1736
1309
1737
1310
try:
1738
1311
client = ProxyClient(child_pipe, fpr,
1739
1312
self.client_address)
1751
1324
client.name)
1752
1325
if self.server.use_dbus:
1753
1326
# Emit D-Bus signal
1754
client.Rejected("Disabled")
1327
client.Rejected("Disabled")
1755
1328
return
1756
1329
1757
if client.approved or not client.approval_delay:
1330
if client._approved or not client.approval_delay:
1758
1331
#We are approved or approval is disabled
1759
1332
break
1760
elif client.approved is None:
1333
elif client._approved is None:
1761
1334
logger.info("Client %s needs approval",
1762
1335
client.name)
1763
1336
if self.server.use_dbus:
1764
1337
# Emit D-Bus signal
1765
1338
client.NeedApproval(
1766
client.approval_delay.total_seconds()
1767
* 1000, client.approved_by_default)
1339
client.approval_delay_milliseconds(),
1340
client.approved_by_default)
1768
1341
else:
1769
1342
logger.warning("Client %s was not approved",
1770
1343
client.name)
1774
1347
return
1775
1348
1776
1349
#wait until timeout or approved
1350
#x = float(client._timedelta_to_milliseconds(delay))
1777
1351
time = datetime.datetime.now()
1778
1352
client.changedstate.acquire()
1779
client.changedstate.wait(delay.total_seconds())
1353
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1780
1354
client.changedstate.release()
1781
1355
time2 = datetime.datetime.now()
1782
1356
if (time2 - time) >= delay:
1798
1372
try:
1799
1373
sent = session.send(client.secret[sent_size:])
1800
1374
except gnutls.errors.GNUTLSError as error:
1801
logger.warning("gnutls send failed",
1802
exc_info=error)
1375
logger.warning("gnutls send failed")
1803
1376
return
1804
1377
logger.debug("Sent: %d, remaining: %d",
1805
1378
sent, len(client.secret)
1806
1379
- (sent_size + sent))
1807
1380
sent_size += sent
1808
1381
1809
1382
logger.info("Sending secret to %s", client.name)
1810
# bump the timeout using extended_timeout
1811
client.bump_timeout(client.extended_timeout)
1383
# bump the timeout as if seen
1384
client.checked_ok(client.extended_timeout)
1812
1385
if self.server.use_dbus:
1813
1386
# Emit D-Bus signal
1814
1387
client.GotSecret()
1819
1392
try:
1820
1393
session.bye()
1821
1394
except gnutls.errors.GNUTLSError as error:
1822
logger.warning("GnuTLS bye failed",
1823
exc_info=error)
1395
logger.warning("GnuTLS bye failed")
1824
1396
1825
1397
@staticmethod
1826
1398
def peer_certificate(session):
1882
1454
# Convert the buffer to a Python bytestring
1883
1455
fpr = ctypes.string_at(buf, buf_len.value)
1884
1456
# Convert the bytestring to hexadecimal notation
1885
hex_fpr = binascii.hexlify(fpr).upper()
1457
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1886
1458
return hex_fpr
1887
1459
1888
1460
1891
1463
def sub_process_main(self, request, address):
1892
1464
try:
1893
1465
self.finish_request(request, address)
1894
except Exception:
1466
except:
1895
1467
self.handle_error(request, address)
1896
1468
self.close_request(request)
1897
1469
1898
1470
def process_request(self, request, address):
1899
1471
"""Start a new process to process the request."""
1900
proc = multiprocessing.Process(target = self.sub_process_main,
1901
args = (request, address))
1902
proc.start()
1903
return proc
1904
1472
multiprocessing.Process(target = self.sub_process_main,
1473
args = (request, address)).start()
1905
1474
1906
1475
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1907
1476
""" adds a pipe to the MixIn """
1911
1480
This function creates a new pipe in self.pipe
1912
1481
"""
1913
1482
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1914
1915
proc = MultiprocessingMixIn.process_request(self, request,
1916
client_address)
1483
1484
super(MultiprocessingMixInWithPipe,
1485
self).process_request(request, client_address)
1917
1486
self.child_pipe.close()
1918
self.add_pipe(parent_pipe, proc)
1919
1920
def add_pipe(self, parent_pipe, proc):
1487
self.add_pipe(parent_pipe)
1488
1489
def add_pipe(self, parent_pipe):
1921
1490
"""Dummy function; override as necessary"""
1922
raise NotImplementedError()
1923
1491
raise NotImplementedError
1924
1492
1925
1493
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1926
1494
socketserver.TCPServer, object):
1932
1500
use_ipv6: Boolean; to use IPv6 or not
1933
1501
"""
1934
1502
def __init__(self, server_address, RequestHandlerClass,
1935
interface=None, use_ipv6=True, socketfd=None):
1936
"""If socketfd is set, use that file descriptor instead of
1937
creating a new one with socket.socket().
1938
"""
1503
interface=None, use_ipv6=True):
1939
1504
self.interface = interface
1940
1505
if use_ipv6:
1941
1506
self.address_family = socket.AF_INET6
1942
if socketfd is not None:
1943
# Save the file descriptor
1944
self.socketfd = socketfd
1945
# Save the original socket.socket() function
1946
self.socket_socket = socket.socket
1947
# To implement --socket, we monkey patch socket.socket.
1948
#
1949
# (When socketserver.TCPServer is a new-style class, we
1950
# could make self.socket into a property instead of monkey
1951
# patching socket.socket.)
1952
#
1953
# Create a one-time-only replacement for socket.socket()
1954
@functools.wraps(socket.socket)
1955
def socket_wrapper(*args, **kwargs):
1956
# Restore original function so subsequent calls are
1957
# not affected.
1958
socket.socket = self.socket_socket
1959
del self.socket_socket
1960
# This time only, return a new socket object from the
1961
# saved file descriptor.
1962
return socket.fromfd(self.socketfd, *args, **kwargs)
1963
# Replace socket.socket() function with wrapper
1964
socket.socket = socket_wrapper
1965
# The socketserver.TCPServer.__init__ will call
1966
# socket.socket(), which might be our replacement,
1967
# socket_wrapper(), if socketfd was set.
1968
1507
socketserver.TCPServer.__init__(self, server_address,
1969
1508
RequestHandlerClass)
1970
1971
1509
def server_bind(self):
1972
1510
"""This overrides the normal server_bind() function
1973
1511
to bind to an interface if one was specified, and also NOT to
1981
1519
try:
1982
1520
self.socket.setsockopt(socket.SOL_SOCKET,
1983
1521
SO_BINDTODEVICE,
1984
(self.interface + "\0")
1985
.encode("utf-8"))
1522
str(self.interface
1523
+ '\0'))
1986
1524
except socket.error as error:
1987
if error.errno == errno.EPERM:
1988
logger.error("No permission to bind to"
1989
" interface %s", self.interface)
1990
elif error.errno == errno.ENOPROTOOPT:
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:
1991
1530
logger.error("SO_BINDTODEVICE not available;"
1992
1531
" cannot bind to interface %s",
1993
1532
self.interface)
1994
elif error.errno == errno.ENODEV:
1995
logger.error("Interface %s does not exist,"
1996
" cannot bind", self.interface)
1997
1533
else:
1998
1534
raise
1999
1535
# Only bind(2) the socket if we really need to.
2002
1538
if self.address_family == socket.AF_INET6:
2003
1539
any_address = "::" # in6addr_any
2004
1540
else:
2005
any_address = "0.0.0.0" # INADDR_ANY
1541
any_address = socket.INADDR_ANY
2006
1542
self.server_address = (any_address,
2007
1543
self.server_address[1])
2008
1544
elif not self.server_address[1]:
2029
1565
"""
2030
1566
def __init__(self, server_address, RequestHandlerClass,
2031
1567
interface=None, use_ipv6=True, clients=None,
2032
gnutls_priority=None, use_dbus=True, socketfd=None):
1568
gnutls_priority=None, use_dbus=True):
2033
1569
self.enabled = False
2034
1570
self.clients = clients
2035
1571
if self.clients is None:
2036
self.clients = {}
1572
self.clients = set()
2037
1573
self.use_dbus = use_dbus
2038
1574
self.gnutls_priority = gnutls_priority
2039
1575
IPv6_TCPServer.__init__(self, server_address,
2040
1576
RequestHandlerClass,
2041
1577
interface = interface,
2042
use_ipv6 = use_ipv6,
2043
socketfd = socketfd)
1578
use_ipv6 = use_ipv6)
2044
1579
def server_activate(self):
2045
1580
if self.enabled:
2046
1581
return socketserver.TCPServer.server_activate(self)
2047
2048
1582
def enable(self):
2049
1583
self.enabled = True
2050
2051
def add_pipe(self, parent_pipe, proc):
1584
def add_pipe(self, parent_pipe):
2052
1585
# Call "handle_ipc" for both data and EOF events
2053
1586
gobject.io_add_watch(parent_pipe.fileno(),
2054
1587
gobject.IO_IN | gobject.IO_HUP,
2055
1588
functools.partial(self.handle_ipc,
2056
parent_pipe =
2057
parent_pipe,
2058
proc = proc))
2059
1589
parent_pipe = parent_pipe))
1590
2060
1591
def handle_ipc(self, source, condition, parent_pipe=None,
2061
proc = None, client_object=None):
2062
# error, or the other end of multiprocessing.Pipe has closed
2063
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2064
# Wait for other process to exit
2065
proc.join()
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):
2066
1609
return False
2067
1610
2068
1611
# Read a request from the child
2073
1616
fpr = request[1]
2074
1617
address = request[2]
2075
1618
2076
for c in self.clients.itervalues():
1619
for c in self.clients:
2077
1620
if c.fingerprint == fpr:
2078
1621
client = c
2079
1622
break
2082
1625
"dress: %s", fpr, address)
2083
1626
if self.use_dbus:
2084
1627
# Emit D-Bus signal
2085
mandos_dbus_service.ClientNotFound(fpr,
2086
address[0])
1628
mandos_dbus_service.ClientNotFound(fpr, address[0])
2087
1629
parent_pipe.send(False)
2088
1630
return False
2089
1631
2090
1632
gobject.io_add_watch(parent_pipe.fileno(),
2091
1633
gobject.IO_IN | gobject.IO_HUP,
2092
1634
functools.partial(self.handle_ipc,
2093
parent_pipe =
2094
parent_pipe,
2095
proc = proc,
2096
client_object =
2097
client))
1635
parent_pipe = parent_pipe,
1636
client_object = client))
2098
1637
parent_pipe.send(True)
2099
# remove the old hook in favor of the new above hook on
2100
# same fileno
1638
# remove the old hook in favor of the new above hook on same fileno
2101
1639
return False
2102
1640
if command == 'funcall':
2103
1641
funcname = request[1]
2104
1642
args = request[2]
2105
1643
kwargs = request[3]
2106
1644
2107
parent_pipe.send(('data', getattr(client_object,
2108
funcname)(*args,
2109
**kwargs)))
2110
1645
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1646
2111
1647
if command == 'getattr':
2112
1648
attrname = request[1]
2113
1649
if callable(client_object.__getattribute__(attrname)):
2114
1650
parent_pipe.send(('function',))
2115
1651
else:
2116
parent_pipe.send(('data', client_object
2117
.__getattribute__(attrname)))
1652
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2118
1653
2119
1654
if command == 'setattr':
2120
1655
attrname = request[1]
2121
1656
value = request[2]
2122
1657
setattr(client_object, attrname, value)
2123
1658
2124
1659
return True
2125
1660
2126
1661
2127
def rfc3339_duration_to_delta(duration):
2128
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2129
2130
>>> rfc3339_duration_to_delta("P7D")
2131
datetime.timedelta(7)
2132
>>> rfc3339_duration_to_delta("PT60S")
2133
datetime.timedelta(0, 60)
2134
>>> rfc3339_duration_to_delta("PT60M")
2135
datetime.timedelta(0, 3600)
2136
>>> rfc3339_duration_to_delta("PT24H")
2137
datetime.timedelta(1)
2138
>>> rfc3339_duration_to_delta("P1W")
2139
datetime.timedelta(7)
2140
>>> rfc3339_duration_to_delta("PT5M30S")
2141
datetime.timedelta(0, 330)
2142
>>> rfc3339_duration_to_delta("P1DT3M20S")
2143
datetime.timedelta(1, 200)
2144
"""
2145
2146
# Parsing an RFC 3339 duration with regular expressions is not
2147
# possible - there would have to be multiple places for the same
2148
# values, like seconds. The current code, while more esoteric, is
2149
# cleaner without depending on a parsing library. If Python had a
2150
# built-in library for parsing we would use it, but we'd like to
2151
# avoid excessive use of external libraries.
2152
2153
# New type for defining tokens, syntax, and semantics all-in-one
2154
Token = collections.namedtuple("Token",
2155
("regexp", # To match token; if
2156
# "value" is not None,
2157
# must have a "group"
2158
# containing digits
2159
"value", # datetime.timedelta or
2160
# None
2161
"followers")) # Tokens valid after
2162
# this token
2163
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2164
# the "duration" ABNF definition in RFC 3339, Appendix A.
2165
token_end = Token(re.compile(r"$"), None, frozenset())
2166
token_second = Token(re.compile(r"(\d+)S"),
2167
datetime.timedelta(seconds=1),
2168
frozenset((token_end,)))
2169
token_minute = Token(re.compile(r"(\d+)M"),
2170
datetime.timedelta(minutes=1),
2171
frozenset((token_second, token_end)))
2172
token_hour = Token(re.compile(r"(\d+)H"),
2173
datetime.timedelta(hours=1),
2174
frozenset((token_minute, token_end)))
2175
token_time = Token(re.compile(r"T"),
2176
None,
2177
frozenset((token_hour, token_minute,
2178
token_second)))
2179
token_day = Token(re.compile(r"(\d+)D"),
2180
datetime.timedelta(days=1),
2181
frozenset((token_time, token_end)))
2182
token_month = Token(re.compile(r"(\d+)M"),
2183
datetime.timedelta(weeks=4),
2184
frozenset((token_day, token_end)))
2185
token_year = Token(re.compile(r"(\d+)Y"),
2186
datetime.timedelta(weeks=52),
2187
frozenset((token_month, token_end)))
2188
token_week = Token(re.compile(r"(\d+)W"),
2189
datetime.timedelta(weeks=1),
2190
frozenset((token_end,)))
2191
token_duration = Token(re.compile(r"P"), None,
2192
frozenset((token_year, token_month,
2193
token_day, token_time,
2194
token_week)))
2195
# Define starting values
2196
value = datetime.timedelta() # Value so far
2197
found_token = None
2198
followers = frozenset((token_duration,)) # Following valid tokens
2199
s = duration # String left to parse
2200
# Loop until end token is found
2201
while found_token is not token_end:
2202
# Search for any currently valid tokens
2203
for token in followers:
2204
match = token.regexp.match(s)
2205
if match is not None:
2206
# Token found
2207
if token.value is not None:
2208
# Value found, parse digits
2209
factor = int(match.group(1), 10)
2210
# Add to value so far
2211
value += factor * token.value
2212
# Strip token from string
2213
s = token.regexp.sub("", s, 1)
2214
# Go to found token
2215
found_token = token
2216
# Set valid next tokens
2217
followers = found_token.followers
2218
break
2219
else:
2220
# No currently valid tokens were found
2221
raise ValueError("Invalid RFC 3339 duration")
2222
# End token found
2223
return value
2224
2225
2226
1662
def string_to_delta(interval):
2227
1663
"""Parse a string and return a datetime.timedelta
2228
1664
2239
1675
>>> string_to_delta('5m 30s')
2240
1676
datetime.timedelta(0, 330)
2241
1677
"""
2242
2243
try:
2244
return rfc3339_duration_to_delta(interval)
2245
except ValueError:
2246
pass
2247
2248
1678
timevalue = datetime.timedelta(0)
2249
1679
for s in interval.split():
2250
1680
try:
2251
suffix = s[-1]
1681
suffix = unicode(s[-1])
2252
1682
value = int(s[:-1])
2253
1683
if suffix == "d":
2254
1684
delta = datetime.timedelta(value)
2261
1691
elif suffix == "w":
2262
1692
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2263
1693
else:
2264
raise ValueError("Unknown suffix {!r}"
2265
.format(suffix))
2266
except IndexError as e:
1694
raise ValueError("Unknown suffix %r" % suffix)
1695
except (ValueError, IndexError) as e:
2267
1696
raise ValueError(*(e.args))
2268
1697
timevalue += delta
2269
1698
return timevalue
2270
1699
2271
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
2272
1725
def daemon(nochdir = False, noclose = False):
2273
1726
"""See daemon(3). Standard BSD Unix function.
2274
1727
2282
1735
sys.exit()
2283
1736
if not noclose:
2284
1737
# Close all standard open file descriptors
2285
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1738
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2286
1739
if not stat.S_ISCHR(os.fstat(null).st_mode):
2287
raise OSError(errno.ENODEV, "{} not a character device"
2288
.format(os.devnull))
1740
raise OSError(errno.ENODEV,
1741
"%s not a character device"
1742
% os.path.devnull)
2289
1743
os.dup2(null, sys.stdin.fileno())
2290
1744
os.dup2(null, sys.stdout.fileno())
2291
1745
os.dup2(null, sys.stderr.fileno())
2300
1754
2301
1755
parser = argparse.ArgumentParser()
2302
1756
parser.add_argument("-v", "--version", action="version",
2303
version = "%(prog)s {}".format(version),
1757
version = "%%(prog)s %s" % version,
2304
1758
help="show version number and exit")
2305
1759
parser.add_argument("-i", "--interface", metavar="IF",
2306
1760
help="Bind to interface IF")
2312
1766
help="Run self-test")
2313
1767
parser.add_argument("--debug", action="store_true",
2314
1768
help="Debug mode; run in foreground and log"
2315
" to terminal", default=None)
1769
" to terminal")
2316
1770
parser.add_argument("--debuglevel", metavar="LEVEL",
2317
1771
help="Debug level for stdout output")
2318
1772
parser.add_argument("--priority", help="GnuTLS"
2325
1779
" files")
2326
1780
parser.add_argument("--no-dbus", action="store_false",
2327
1781
dest="use_dbus", help="Do not provide D-Bus"
2328
" system bus interface", default=None)
1782
" system bus interface")
2329
1783
parser.add_argument("--no-ipv6", action="store_false",
2330
dest="use_ipv6", help="Do not use IPv6",
2331
default=None)
2332
parser.add_argument("--no-restore", action="store_false",
2333
dest="restore", help="Do not restore stored"
2334
" state", default=None)
2335
parser.add_argument("--socket", type=int,
2336
help="Specify a file descriptor to a network"
2337
" socket to use instead of creating one")
2338
parser.add_argument("--statedir", metavar="DIR",
2339
help="Directory to save/restore state in")
2340
parser.add_argument("--foreground", action="store_true",
2341
help="Run in foreground", default=None)
2342
parser.add_argument("--no-zeroconf", action="store_false",
2343
dest="zeroconf", help="Do not use Zeroconf",
2344
default=None)
2345
1784
dest="use_ipv6", help="Do not use IPv6")
2346
1785
options = parser.parse_args()
2347
1786
2348
1787
if options.check:
2349
1788
import doctest
2350
fail_count, test_count = doctest.testmod()
2351
sys.exit(os.EX_OK if fail_count == 0 else 1)
1789
doctest.testmod()
1790
sys.exit()
2352
1791
2353
1792
# Default values for config file for server-global settings
2354
1793
server_defaults = { "interface": "",
2356
1795
"port": "",
2357
1796
"debug": "False",
2358
1797
"priority":
2359
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2360
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1798
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2361
1799
"servicename": "Mandos",
2362
1800
"use_dbus": "True",
2363
1801
"use_ipv6": "True",
2364
1802
"debuglevel": "",
2365
"restore": "True",
2366
"socket": "",
2367
"statedir": "/var/lib/mandos",
2368
"foreground": "False",
2369
"zeroconf": "True",
2370
1803
}
2371
1804
2372
1805
# Parse config file for server-global settings
2377
1810
# Convert the SafeConfigParser object to a dict
2378
1811
server_settings = server_config.defaults()
2379
1812
# Use the appropriate methods on the non-string config options
2380
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1813
for option in ("debug", "use_dbus", "use_ipv6"):
2381
1814
server_settings[option] = server_config.getboolean("DEFAULT",
2382
1815
option)
2383
1816
if server_settings["port"]:
2384
1817
server_settings["port"] = server_config.getint("DEFAULT",
2385
1818
"port")
2386
if server_settings["socket"]:
2387
server_settings["socket"] = server_config.getint("DEFAULT",
2388
"socket")
2389
# Later, stdin will, and stdout and stderr might, be dup'ed
2390
# over with an opened os.devnull. But we don't want this to
2391
# happen with a supplied network socket.
2392
if 0 <= server_settings["socket"] <= 2:
2393
server_settings["socket"] = os.dup(server_settings
2394
["socket"])
2395
1819
del server_config
2396
1820
2397
1821
# Override the settings from the config file with command line
2398
1822
# options, if set.
2399
1823
for option in ("interface", "address", "port", "debug",
2400
1824
"priority", "servicename", "configdir",
2401
"use_dbus", "use_ipv6", "debuglevel", "restore",
2402
"statedir", "socket", "foreground", "zeroconf"):
1825
"use_dbus", "use_ipv6", "debuglevel"):
2403
1826
value = getattr(options, option)
2404
1827
if value is not None:
2405
1828
server_settings[option] = value
2406
1829
del options
2407
1830
# Force all strings to be unicode
2408
1831
for option in server_settings.keys():
2409
if isinstance(server_settings[option], bytes):
2410
server_settings[option] = (server_settings[option]
2411
.decode("utf-8"))
2412
# Force all boolean options to be boolean
2413
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2414
"foreground", "zeroconf"):
2415
server_settings[option] = bool(server_settings[option])
2416
# Debug implies foreground
2417
if server_settings["debug"]:
2418
server_settings["foreground"] = True
1832
if type(server_settings[option]) is str:
1833
server_settings[option] = unicode(server_settings[option])
2419
1834
# Now we have our good server settings in "server_settings"
2420
1835
2421
1836
##################################################################
2422
1837
2423
if (not server_settings["zeroconf"] and
2424
not (server_settings["port"]
2425
or server_settings["socket"] != "")):
2426
parser.error("Needs port or socket to work without"
2427
" Zeroconf")
2428
2429
1838
# For convenience
2430
1839
debug = server_settings["debug"]
2431
1840
debuglevel = server_settings["debuglevel"]
2432
1841
use_dbus = server_settings["use_dbus"]
2433
1842
use_ipv6 = server_settings["use_ipv6"]
2434
stored_state_path = os.path.join(server_settings["statedir"],
2435
stored_state_file)
2436
foreground = server_settings["foreground"]
2437
zeroconf = server_settings["zeroconf"]
2438
2439
if debug:
2440
initlogger(debug, logging.DEBUG)
2441
else:
2442
if not debuglevel:
2443
initlogger(debug)
2444
else:
2445
level = getattr(logging, debuglevel.upper())
2446
initlogger(debug, level)
2447
1843
2448
1844
if server_settings["servicename"] != "Mandos":
2449
1845
syslogger.setFormatter(logging.Formatter
2450
('Mandos ({}) [%(process)d]:'
2451
' %(levelname)s: %(message)s'
2452
.format(server_settings
2453
["servicename"])))
1846
('Mandos (%s) [%%(process)d]:'
1847
' %%(levelname)s: %%(message)s'
1848
% server_settings["servicename"]))
2454
1849
2455
1850
# Parse config file with clients
2456
client_config = configparser.SafeConfigParser(Client
2457
.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)
2458
1860
client_config.read(os.path.join(server_settings["configdir"],
2459
1861
"clients.conf"))
2460
1862
2461
1863
global mandos_dbus_service
2462
1864
mandos_dbus_service = None
2463
1865
2464
socketfd = None
2465
if server_settings["socket"] != "":
2466
socketfd = server_settings["socket"]
2467
1866
tcp_server = MandosServer((server_settings["address"],
2468
1867
server_settings["port"]),
2469
1868
ClientHandler,
2472
1871
use_ipv6=use_ipv6,
2473
1872
gnutls_priority=
2474
1873
server_settings["priority"],
2475
use_dbus=use_dbus,
2476
socketfd=socketfd)
2477
if not foreground:
2478
pidfilename = "/run/mandos.pid"
2479
if not os.path.isdir("/run/."):
2480
pidfilename = "/var/run/mandos.pid"
2481
pidfile = None
1874
use_dbus=use_dbus)
1875
if not debug:
1876
pidfilename = "/var/run/mandos.pid"
2482
1877
try:
2483
1878
pidfile = open(pidfilename, "w")
2484
except IOError as e:
2485
logger.error("Could not open file %r", pidfilename,
2486
exc_info=e)
1879
except IOError:
1880
logger.error("Could not open file %r", pidfilename)
2487
1881
2488
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:
2489
1886
try:
2490
uid = pwd.getpwnam(name).pw_uid
2491
gid = pwd.getpwnam(name).pw_gid
2492
break
1887
uid = pwd.getpwnam("mandos").pw_uid
1888
gid = pwd.getpwnam("mandos").pw_gid
2493
1889
except KeyError:
2494
continue
2495
else:
2496
uid = 65534
2497
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
2498
1896
try:
2499
1897
os.setgid(gid)
2500
1898
os.setuid(uid)
2501
1899
except OSError as error:
2502
if error.errno != errno.EPERM:
2503
raise
1900
if error[0] != errno.EPERM:
1901
raise error
2504
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
2505
1911
if debug:
2506
1912
# Enable all possible GnuTLS debugging
2507
1913
2517
1923
.gnutls_global_set_log_function(debug_gnutls))
2518
1924
2519
1925
# Redirect stdin so all checkers get /dev/null
2520
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1926
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2521
1927
os.dup2(null, sys.stdin.fileno())
2522
1928
if null > 2:
2523
1929
os.close(null)
1930
else:
1931
# No console logging
1932
logger.removeHandler(console)
2524
1933
2525
1934
# Need to fork before connecting to D-Bus
2526
if not foreground:
1935
if not debug:
2527
1936
# Close all input and output, do double fork, etc.
2528
1937
daemon()
2529
1938
2530
# multiprocessing will use threads, so before we use gobject we
2531
# need to inform gobject that threads will be used.
2532
gobject.threads_init()
2533
2534
1939
global main_loop
2535
1940
# From the Avahi example code
2536
DBusGMainLoop(set_as_default=True)
1941
DBusGMainLoop(set_as_default=True )
2537
1942
main_loop = gobject.MainLoop()
2538
1943
bus = dbus.SystemBus()
2539
1944
# End of Avahi example code
2540
1945
if use_dbus:
2541
1946
try:
2542
bus_name = dbus.service.BusName("se.recompile.Mandos",
1947
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2543
1948
bus, do_not_queue=True)
2544
old_bus_name = (dbus.service.BusName
2545
("se.bsnet.fukt.Mandos", bus,
2546
do_not_queue=True))
2547
1949
except dbus.exceptions.NameExistsException as e:
2548
logger.error("Disabling D-Bus:", exc_info=e)
1950
logger.error(unicode(e) + ", disabling D-Bus")
2549
1951
use_dbus = False
2550
1952
server_settings["use_dbus"] = False
2551
1953
tcp_server.use_dbus = False
2552
if zeroconf:
2553
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2554
service = AvahiServiceToSyslog(name =
2555
server_settings["servicename"],
2556
servicetype = "_mandos._tcp",
2557
protocol = protocol, bus = bus)
2558
if server_settings["interface"]:
2559
service.interface = (if_nametoindex
2560
(server_settings["interface"]
2561
.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"])))
2562
1961
2563
1962
global multiprocessing_manager
2564
1963
multiprocessing_manager = multiprocessing.Manager()
2566
1965
client_class = Client
2567
1966
if use_dbus:
2568
1967
client_class = functools.partial(ClientDBus, bus = bus)
2569
2570
client_settings = Client.config_parser(client_config)
2571
old_client_settings = {}
2572
clients_data = {}
2573
2574
# This is used to redirect stdout and stderr for checker processes
2575
global wnull
2576
wnull = open(os.devnull, "w") # A writable /dev/null
2577
# Only used if server is running in foreground but not in debug
2578
# mode
2579
if debug or not foreground:
2580
wnull.close()
2581
2582
# Get client data and settings from last running state.
2583
if server_settings["restore"]:
2584
try:
2585
with open(stored_state_path, "rb") as stored_state:
2586
clients_data, old_client_settings = (pickle.load
2587
(stored_state))
2588
os.remove(stored_state_path)
2589
except IOError as e:
2590
if e.errno == errno.ENOENT:
2591
logger.warning("Could not load persistent state: {}"
2592
.format(os.strerror(e.errno)))
2593
else:
2594
logger.critical("Could not load persistent state:",
2595
exc_info=e)
2596
raise
2597
except EOFError as e:
2598
logger.warning("Could not load persistent state: "
2599
"EOFError:", exc_info=e)
2600
2601
with PGPEngine() as pgp:
2602
for client_name, client in clients_data.items():
2603
# Skip removed clients
2604
if client_name not in client_settings:
2605
continue
2606
2607
# Decide which value to use after restoring saved state.
2608
# We have three different values: Old config file,
2609
# new config file, and saved state.
2610
# New config value takes precedence if it differs from old
2611
# config value, otherwise use saved state.
2612
for name, value in client_settings[client_name].items():
2613
try:
2614
# For each value in new config, check if it
2615
# differs from the old config value (Except for
2616
# the "secret" attribute)
2617
if (name != "secret" and
2618
value != old_client_settings[client_name]
2619
[name]):
2620
client[name] = value
2621
except KeyError:
2622
pass
2623
2624
# Clients who has passed its expire date can still be
2625
# enabled if its last checker was successful. Clients
2626
# whose checker succeeded before we stored its state is
2627
# assumed to have successfully run all checkers during
2628
# downtime.
2629
if client["enabled"]:
2630
if datetime.datetime.utcnow() >= client["expires"]:
2631
if not client["last_checked_ok"]:
2632
logger.warning(
2633
"disabling client {} - Client never "
2634
"performed a successful checker"
2635
.format(client_name))
2636
client["enabled"] = False
2637
elif client["last_checker_status"] != 0:
2638
logger.warning(
2639
"disabling client {} - Client last"
2640
" checker failed with error code {}"
2641
.format(client_name,
2642
client["last_checker_status"]))
2643
client["enabled"] = False
2644
else:
2645
client["expires"] = (datetime.datetime
2646
.utcnow()
2647
+ client["timeout"])
2648
logger.debug("Last checker succeeded,"
2649
" keeping {} enabled"
2650
.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):
2651
1975
try:
2652
client["secret"] = (
2653
pgp.decrypt(client["encrypted_secret"],
2654
client_settings[client_name]
2655
["secret"]))
2656
except PGPError:
2657
# If decryption fails, we use secret from new settings
2658
logger.debug("Failed to decrypt {} old secret"
2659
.format(client_name))
2660
client["secret"] = (
2661
client_settings[client_name]["secret"])
2662
2663
# Add/remove clients based on new changes made to config
2664
for client_name in (set(old_client_settings)
2665
- set(client_settings)):
2666
del clients_data[client_name]
2667
for client_name in (set(client_settings)
2668
- set(old_client_settings)):
2669
clients_data[client_name] = client_settings[client_name]
2670
2671
# Create all client objects
2672
for client_name, client in clients_data.items():
2673
tcp_server.clients[client_name] = client_class(
2674
name = client_name, settings = client,
2675
server_settings = server_settings)
2676
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()))
2677
1985
if not tcp_server.clients:
2678
1986
logger.warning("No clients defined")
2679
2680
if not foreground:
2681
if pidfile is not None:
2682
try:
2683
with pidfile:
2684
pid = os.getpid()
2685
pidfile.write("{}\n".format(pid).encode("utf-8"))
2686
except IOError:
2687
logger.error("Could not write to file %r with PID %d",
2688
pidfilename, pid)
2689
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
2690
2000
del pidfilename
2691
2001
2002
signal.signal(signal.SIGINT, signal.SIG_IGN)
2003
2692
2004
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2693
2005
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2694
2006
2695
2007
if use_dbus:
2696
@alternate_dbus_interfaces({"se.recompile.Mandos":
2697
"se.bsnet.fukt.Mandos"})
2698
class MandosDBusService(DBusObjectWithProperties):
2008
class MandosDBusService(dbus.service.Object):
2699
2009
"""A D-Bus proxy object"""
2700
2010
def __init__(self):
2701
2011
dbus.service.Object.__init__(self, bus, "/")
2702
_interface = "se.recompile.Mandos"
2703
2704
@dbus_interface_annotations(_interface)
2705
def _foo(self):
2706
return { "org.freedesktop.DBus.Property"
2707
".EmitsChangedSignal":
2708
"false"}
2012
_interface = "se.bsnet.fukt.Mandos"
2709
2013
2710
2014
@dbus.service.signal(_interface, signature="o")
2711
2015
def ClientAdded(self, objpath):
2726
2030
def GetAllClients(self):
2727
2031
"D-Bus method"
2728
2032
return dbus.Array(c.dbus_object_path
2729
for c in
2730
tcp_server.clients.itervalues())
2033
for c in tcp_server.clients)
2731
2034
2732
2035
@dbus.service.method(_interface,
2733
2036
out_signature="a{oa{sv}}")
2734
2037
def GetAllClientsWithProperties(self):
2735
2038
"D-Bus method"
2736
2039
return dbus.Dictionary(
2737
{ c.dbus_object_path: c.GetAll("")
2738
for c in tcp_server.clients.itervalues() },
2040
((c.dbus_object_path, c.GetAll(""))
2041
for c in tcp_server.clients),
2739
2042
signature="oa{sv}")
2740
2043
2741
2044
@dbus.service.method(_interface, in_signature="o")
2742
2045
def RemoveClient(self, object_path):
2743
2046
"D-Bus method"
2744
for c in tcp_server.clients.itervalues():
2047
for c in tcp_server.clients:
2745
2048
if c.dbus_object_path == object_path:
2746
del tcp_server.clients[c.name]
2049
tcp_server.clients.remove(c)
2747
2050
c.remove_from_connection()
2748
2051
# Don't signal anything except ClientRemoved
2749
2052
c.disable(quiet=True)
2758
2061
2759
2062
def cleanup():
2760
2063
"Cleanup function; run on exit"
2761
if zeroconf:
2762
service.cleanup()
2763
2764
multiprocessing.active_children()
2765
wnull.close()
2766
if not (tcp_server.clients or client_settings):
2767
return
2768
2769
# Store client before exiting. Secrets are encrypted with key
2770
# based on what config file has. If config file is
2771
# removed/edited, old secret will thus be unrecovable.
2772
clients = {}
2773
with PGPEngine() as pgp:
2774
for client in tcp_server.clients.itervalues():
2775
key = client_settings[client.name]["secret"]
2776
client.encrypted_secret = pgp.encrypt(client.secret,
2777
key)
2778
client_dict = {}
2779
2780
# A list of attributes that can not be pickled
2781
# + secret.
2782
exclude = { "bus", "changedstate", "secret",
2783
"checker", "server_settings" }
2784
for name, typ in (inspect.getmembers
2785
(dbus.service.Object)):
2786
exclude.add(name)
2787
2788
client_dict["encrypted_secret"] = (client
2789
.encrypted_secret)
2790
for attr in client.client_structure:
2791
if attr not in exclude:
2792
client_dict[attr] = getattr(client, attr)
2793
2794
clients[client.name] = client_dict
2795
del client_settings[client.name]["secret"]
2796
2797
try:
2798
with (tempfile.NamedTemporaryFile
2799
(mode='wb', suffix=".pickle", prefix='clients-',
2800
dir=os.path.dirname(stored_state_path),
2801
delete=False)) as stored_state:
2802
pickle.dump((clients, client_settings), stored_state)
2803
tempname=stored_state.name
2804
os.rename(tempname, stored_state_path)
2805
except (IOError, OSError) as e:
2806
if not debug:
2807
try:
2808
os.remove(tempname)
2809
except NameError:
2810
pass
2811
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2812
logger.warning("Could not save persistent state: {}"
2813
.format(os.strerror(e.errno)))
2814
else:
2815
logger.warning("Could not save persistent state:",
2816
exc_info=e)
2817
raise
2818
2819
# Delete all clients, and settings from config
2064
service.cleanup()
2065
2820
2066
while tcp_server.clients:
2821
name, client = tcp_server.clients.popitem()
2067
client = tcp_server.clients.pop()
2822
2068
if use_dbus:
2823
2069
client.remove_from_connection()
2070
client.disable_hook = None
2824
2071
# Don't signal anything except ClientRemoved
2825
2072
client.disable(quiet=True)
2826
2073
if use_dbus:
2827
2074
# Emit D-Bus signal
2828
mandos_dbus_service.ClientRemoved(client
2829
.dbus_object_path,
2075
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2830
2076
client.name)
2831
client_settings.clear()
2832
2077
2833
2078
atexit.register(cleanup)
2834
2079
2835
for client in tcp_server.clients.itervalues():
2080
for client in tcp_server.clients:
2836
2081
if use_dbus:
2837
2082
# Emit D-Bus signal
2838
2083
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2839
# Need to initiate checking of clients
2840
if client.enabled:
2841
client.init_checker()
2084
client.enable()
2842
2085
2843
2086
tcp_server.enable()
2844
2087
tcp_server.server_activate()
2845
2088
2846
2089
# Find out what port we got
2847
if zeroconf:
2848
service.port = tcp_server.socket.getsockname()[1]
2090
service.port = tcp_server.socket.getsockname()[1]
2849
2091
if use_ipv6:
2850
2092
logger.info("Now listening on address %r, port %d,"
2851
" flowinfo %d, scope_id %d",
2852
*tcp_server.socket.getsockname())
2093
" flowinfo %d, scope_id %d"
2094
% tcp_server.socket.getsockname())
2853
2095
else: # IPv4
2854
logger.info("Now listening on address %r, port %d",
2855
*tcp_server.socket.getsockname())
2096
logger.info("Now listening on address %r, port %d"
2097
% tcp_server.socket.getsockname())
2856
2098
2857
2099
#service.interface = tcp_server.socket.getsockname()[3]
2858
2100
2859
2101
try:
2860
if zeroconf:
2861
# From the Avahi example code
2862
try:
2863
service.activate()
2864
except dbus.exceptions.DBusException as error:
2865
logger.critical("D-Bus Exception", exc_info=error)
2866
cleanup()
2867
sys.exit(1)
2868
# 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
2869
2110
2870
2111
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2871
2112
lambda *args, **kwargs:
2875
2116
logger.debug("Starting main loop")
2876
2117
main_loop.run()
2877
2118
except AvahiError as error:
2878
logger.critical("Avahi Error", exc_info=error)
2119
logger.critical("AvahiError: %s", error)
2879
2120
cleanup()
2880
2121
sys.exit(1)
2881
2122
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0