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- Committer: Björn Påhlsson
- Date: 2011-12-21 00:33:12 UTC
- mfrom: (505.2.13 mandos-client-network-hooks)
- Revision ID: belorn@recompile.se-20111221003312-jwn6d76u2c2lejoz
working new feature: network-hooks - Enables user-scripts to take up
interfaces during bootup
interfaces during bootup
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
16
#
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# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
35
36
36
37
import SocketServer as socketserver
37
38
import socket
38
import optparse
39
import argparse
39
40
import datetime
40
41
import errno
41
42
import gnutls.crypto
60
61
import fcntl
61
62
import functools
62
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
67
import tempfile
63
68
64
69
import dbus
65
70
import dbus.service
70
75
import ctypes.util
71
76
import xml.dom.minidom
72
77
import inspect
78
import GnuPGInterface
73
79
74
80
try:
75
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
79
85
except ImportError:
80
86
SO_BINDTODEVICE = None
81
87
82
83
version = "1.0.14"
84
85
logger = logging.Logger(u'mandos')
88
version = "1.4.1"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
86
92
syslogger = (logging.handlers.SysLogHandler
87
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
88
address = "/dev/log"))
89
syslogger.setFormatter(logging.Formatter
90
(u'Mandos [%(process)d]: %(levelname)s:'
91
u' %(message)s'))
92
logger.addHandler(syslogger)
93
94
console = logging.StreamHandler()
95
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
96
u' %(levelname)s:'
97
u' %(message)s'))
98
logger.addHandler(console)
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address = str("/dev/log")))
95
96
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
100
except (OSError, AttributeError):
101
def if_nametoindex(interface):
102
"Get an interface index the hard way, i.e. using fcntl()"
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
with contextlib.closing(socket.socket()) as s:
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
110
return interface_index
111
112
113
def initlogger(level=logging.WARNING):
114
"""init logger and add loglevel"""
115
116
syslogger.setFormatter(logging.Formatter
117
('Mandos [%(process)d]: %(levelname)s:'
118
' %(message)s'))
119
logger.addHandler(syslogger)
120
121
console = logging.StreamHandler()
122
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
123
' [%(process)d]:'
124
' %(levelname)s:'
125
' %(message)s'))
126
logger.addHandler(console)
127
logger.setLevel(level)
128
129
130
class PGPError(Exception):
131
"""Exception if encryption/decryption fails"""
132
pass
133
134
135
class PGPEngine(object):
136
"""A simple class for OpenPGP symmetric encryption & decryption"""
137
def __init__(self):
138
self.gnupg = GnuPGInterface.GnuPG()
139
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.gnupg.options.meta_interactive = False
142
self.gnupg.options.homedir = self.tempdir
143
self.gnupg.options.extra_args.extend(['--force-mdc',
144
'--quiet'])
145
146
def __enter__(self):
147
return self
148
149
def __exit__ (self, exc_type, exc_value, traceback):
150
self._cleanup()
151
return False
152
153
def __del__(self):
154
self._cleanup()
155
156
def _cleanup(self):
157
if self.tempdir is not None:
158
# Delete contents of tempdir
159
for root, dirs, files in os.walk(self.tempdir,
160
topdown = False):
161
for filename in files:
162
os.remove(os.path.join(root, filename))
163
for dirname in dirs:
164
os.rmdir(os.path.join(root, dirname))
165
# Remove tempdir
166
os.rmdir(self.tempdir)
167
self.tempdir = None
168
169
def password_encode(self, password):
170
# Passphrase can not be empty and can not contain newlines or
171
# NUL bytes. So we prefix it and hex encode it.
172
return b"mandos" + binascii.hexlify(password)
173
174
def encrypt(self, data, password):
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
177
try:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
182
f.write(data)
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
185
proc.wait()
186
except IOError as e:
187
raise PGPError(e)
188
self.gnupg.passphrase = None
189
return ciphertext
190
191
def decrypt(self, data, password):
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
194
try:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
199
f.write(data)
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
202
proc.wait()
203
except IOError as e:
204
raise PGPError(e)
205
self.gnupg.passphrase = None
206
return decrypted_plaintext
207
208
99
209
100
210
class AvahiError(Exception):
101
211
def __init__(self, value, *args, **kwargs):
117
227
Attributes:
118
228
interface: integer; avahi.IF_UNSPEC or an interface index.
119
229
Used to optionally bind to the specified interface.
120
name: string; Example: u'Mandos'
121
type: string; Example: u'_mandos._tcp'.
230
name: string; Example: 'Mandos'
231
type: string; Example: '_mandos._tcp'.
122
232
See <http://www.dns-sd.org/ServiceTypes.html>
123
233
port: integer; what port to announce
124
234
TXT: list of strings; TXT record for the service
133
243
"""
134
244
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
135
245
servicetype = None, port = None, TXT = None,
136
domain = u"", host = u"", max_renames = 32768,
246
domain = "", host = "", max_renames = 32768,
137
247
protocol = avahi.PROTO_UNSPEC, bus = None):
138
248
self.interface = interface
139
249
self.name = name
148
258
self.group = None # our entry group
149
259
self.server = None
150
260
self.bus = bus
261
self.entry_group_state_changed_match = None
151
262
def rename(self):
152
263
"""Derived from the Avahi example code"""
153
264
if self.rename_count >= self.max_renames:
154
logger.critical(u"No suitable Zeroconf service name found"
155
u" after %i retries, exiting.",
265
logger.critical("No suitable Zeroconf service name found"
266
" after %i retries, exiting.",
156
267
self.rename_count)
157
raise AvahiServiceError(u"Too many renames")
158
self.name = self.server.GetAlternativeServiceName(self.name)
159
logger.info(u"Changing Zeroconf service name to %r ...",
160
unicode(self.name))
161
syslogger.setFormatter(logging.Formatter
162
(u'Mandos (%s) [%%(process)d]:'
163
u' %%(levelname)s: %%(message)s'
164
% self.name))
268
raise AvahiServiceError("Too many renames")
269
self.name = unicode(self.server
270
.GetAlternativeServiceName(self.name))
271
logger.info("Changing Zeroconf service name to %r ...",
272
self.name)
165
273
self.remove()
166
self.add()
274
try:
275
self.add()
276
except dbus.exceptions.DBusException as error:
277
logger.critical("DBusException: %s", error)
278
self.cleanup()
279
os._exit(1)
167
280
self.rename_count += 1
168
281
def remove(self):
169
282
"""Derived from the Avahi example code"""
283
if self.entry_group_state_changed_match is not None:
284
self.entry_group_state_changed_match.remove()
285
self.entry_group_state_changed_match = None
170
286
if self.group is not None:
171
287
self.group.Reset()
172
288
def add(self):
173
289
"""Derived from the Avahi example code"""
290
self.remove()
174
291
if self.group is None:
175
292
self.group = dbus.Interface(
176
293
self.bus.get_object(avahi.DBUS_NAME,
177
294
self.server.EntryGroupNew()),
178
295
avahi.DBUS_INTERFACE_ENTRY_GROUP)
179
self.group.connect_to_signal('StateChanged',
180
self
181
.entry_group_state_changed)
182
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
296
self.entry_group_state_changed_match = (
297
self.group.connect_to_signal(
298
'StateChanged', self.entry_group_state_changed))
299
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
183
300
self.name, self.type)
184
301
self.group.AddService(
185
302
self.interface,
192
309
self.group.Commit()
193
310
def entry_group_state_changed(self, state, error):
194
311
"""Derived from the Avahi example code"""
195
logger.debug(u"Avahi state change: %i", state)
312
logger.debug("Avahi entry group state change: %i", state)
196
313
197
314
if state == avahi.ENTRY_GROUP_ESTABLISHED:
198
logger.debug(u"Zeroconf service established.")
315
logger.debug("Zeroconf service established.")
199
316
elif state == avahi.ENTRY_GROUP_COLLISION:
200
logger.warning(u"Zeroconf service name collision.")
317
logger.info("Zeroconf service name collision.")
201
318
self.rename()
202
319
elif state == avahi.ENTRY_GROUP_FAILURE:
203
logger.critical(u"Avahi: Error in group state changed %s",
320
logger.critical("Avahi: Error in group state changed %s",
204
321
unicode(error))
205
raise AvahiGroupError(u"State changed: %s"
322
raise AvahiGroupError("State changed: %s"
206
323
% unicode(error))
207
324
def cleanup(self):
208
325
"""Derived from the Avahi example code"""
209
326
if self.group is not None:
210
self.group.Free()
327
try:
328
self.group.Free()
329
except (dbus.exceptions.UnknownMethodException,
330
dbus.exceptions.DBusException):
331
pass
211
332
self.group = None
212
def server_state_changed(self, state):
333
self.remove()
334
def server_state_changed(self, state, error=None):
213
335
"""Derived from the Avahi example code"""
214
if state == avahi.SERVER_COLLISION:
215
logger.error(u"Zeroconf server name collision")
216
self.remove()
336
logger.debug("Avahi server state change: %i", state)
337
bad_states = { avahi.SERVER_INVALID:
338
"Zeroconf server invalid",
339
avahi.SERVER_REGISTERING: None,
340
avahi.SERVER_COLLISION:
341
"Zeroconf server name collision",
342
avahi.SERVER_FAILURE:
343
"Zeroconf server failure" }
344
if state in bad_states:
345
if bad_states[state] is not None:
346
if error is None:
347
logger.error(bad_states[state])
348
else:
349
logger.error(bad_states[state] + ": %r", error)
350
self.cleanup()
217
351
elif state == avahi.SERVER_RUNNING:
218
352
self.add()
353
else:
354
if error is None:
355
logger.debug("Unknown state: %r", state)
356
else:
357
logger.debug("Unknown state: %r: %r", state, error)
219
358
def activate(self):
220
359
"""Derived from the Avahi example code"""
221
360
if self.server is None:
222
361
self.server = dbus.Interface(
223
362
self.bus.get_object(avahi.DBUS_NAME,
224
avahi.DBUS_PATH_SERVER),
363
avahi.DBUS_PATH_SERVER,
364
follow_name_owner_changes=True),
225
365
avahi.DBUS_INTERFACE_SERVER)
226
self.server.connect_to_signal(u"StateChanged",
366
self.server.connect_to_signal("StateChanged",
227
367
self.server_state_changed)
228
368
self.server_state_changed(self.server.GetState())
229
369
370
class AvahiServiceToSyslog(AvahiService):
371
def rename(self):
372
"""Add the new name to the syslog messages"""
373
ret = AvahiService.rename(self)
374
syslogger.setFormatter(logging.Formatter
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
377
% self.name))
378
return ret
230
379
380
def timedelta_to_milliseconds(td):
381
"Convert a datetime.timedelta() to milliseconds"
382
return ((td.days * 24 * 60 * 60 * 1000)
383
+ (td.seconds * 1000)
384
+ (td.microseconds // 1000))
385
231
386
class Client(object):
232
387
"""A representation of a client host served by this server.
233
388
234
389
Attributes:
235
name: string; from the config file, used in log messages and
236
D-Bus identifiers
390
approved: bool(); 'None' if not yet approved/disapproved
391
approval_delay: datetime.timedelta(); Time to wait for approval
392
approval_duration: datetime.timedelta(); Duration of one approval
393
checker: subprocess.Popen(); a running checker process used
394
to see if the client lives.
395
'None' if no process is running.
396
checker_callback_tag: a gobject event source tag, or None
397
checker_command: string; External command which is run to check
398
if client lives. %() expansions are done at
399
runtime with vars(self) as dict, so that for
400
instance %(name)s can be used in the command.
401
checker_initiator_tag: a gobject event source tag, or None
402
created: datetime.datetime(); (UTC) object creation
403
client_structure: Object describing what attributes a client has
404
and is used for storing the client at exit
405
current_checker_command: string; current running checker_command
406
disable_initiator_tag: a gobject event source tag, or None
407
enabled: bool()
237
408
fingerprint: string (40 or 32 hexadecimal digits); used to
238
409
uniquely identify the client
239
secret: bytestring; sent verbatim (over TLS) to client
240
410
host: string; available for use by the checker command
241
created: datetime.datetime(); (UTC) object creation
242
last_enabled: datetime.datetime(); (UTC)
243
enabled: bool()
411
interval: datetime.timedelta(); How often to start a new checker
412
last_approval_request: datetime.datetime(); (UTC) or None
244
413
last_checked_ok: datetime.datetime(); (UTC) or None
414
last_checker_status: integer between 0 and 255 reflecting exit
415
status of last checker. -1 reflects crashed
416
checker, or None.
417
last_enabled: datetime.datetime(); (UTC) or None
418
name: string; from the config file, used in log messages and
419
D-Bus identifiers
420
secret: bytestring; sent verbatim (over TLS) to client
245
421
timeout: datetime.timedelta(); How long from last_checked_ok
246
422
until this client is disabled
247
interval: datetime.timedelta(); How often to start a new checker
248
disable_hook: If set, called by disable() as disable_hook(self)
249
checker: subprocess.Popen(); a running checker process used
250
to see if the client lives.
251
'None' if no process is running.
252
checker_initiator_tag: a gobject event source tag, or None
253
disable_initiator_tag: - '' -
254
checker_callback_tag: - '' -
255
checker_command: string; External command which is run to check if
256
client lives. %() expansions are done at
257
runtime with vars(self) as dict, so that for
258
instance %(name)s can be used in the command.
259
current_checker_command: string; current running checker_command
423
extended_timeout: extra long timeout when password has been sent
424
runtime_expansions: Allowed attributes for runtime expansion.
425
expires: datetime.datetime(); time (UTC) when a client will be
426
disabled, or None
260
427
"""
261
428
262
@staticmethod
263
def _timedelta_to_milliseconds(td):
264
"Convert a datetime.timedelta() to milliseconds"
265
return ((td.days * 24 * 60 * 60 * 1000)
266
+ (td.seconds * 1000)
267
+ (td.microseconds // 1000))
429
runtime_expansions = ("approval_delay", "approval_duration",
430
"created", "enabled", "fingerprint",
431
"host", "interval", "last_checked_ok",
432
"last_enabled", "name", "timeout")
433
client_defaults = { "timeout": "5m",
434
"extended_timeout": "15m",
435
"interval": "2m",
436
"checker": "fping -q -- %%(host)s",
437
"host": "",
438
"approval_delay": "0s",
439
"approval_duration": "1s",
440
"approved_by_default": "True",
441
"enabled": "True",
442
}
268
443
269
444
def timeout_milliseconds(self):
270
445
"Return the 'timeout' attribute in milliseconds"
271
return self._timedelta_to_milliseconds(self.timeout)
446
return timedelta_to_milliseconds(self.timeout)
447
448
def extended_timeout_milliseconds(self):
449
"Return the 'extended_timeout' attribute in milliseconds"
450
return timedelta_to_milliseconds(self.extended_timeout)
272
451
273
452
def interval_milliseconds(self):
274
453
"Return the 'interval' attribute in milliseconds"
275
return self._timedelta_to_milliseconds(self.interval)
454
return timedelta_to_milliseconds(self.interval)
276
455
277
def __init__(self, name = None, disable_hook=None, config=None):
456
def approval_delay_milliseconds(self):
457
return timedelta_to_milliseconds(self.approval_delay)
458
459
@staticmethod
460
def config_parser(config):
461
""" Construct a new dict of client settings of this form:
462
{ client_name: {setting_name: value, ...}, ...}
463
with exceptions for any special settings as defined above"""
464
settings = {}
465
for client_name in config.sections():
466
section = dict(config.items(client_name))
467
client = settings[client_name] = {}
468
469
client["host"] = section["host"]
470
# Reformat values from string types to Python types
471
client["approved_by_default"] = config.getboolean(
472
client_name, "approved_by_default")
473
client["enabled"] = config.getboolean(client_name, "enabled")
474
475
client["fingerprint"] = (section["fingerprint"].upper()
476
.replace(" ", ""))
477
if "secret" in section:
478
client["secret"] = section["secret"].decode("base64")
479
elif "secfile" in section:
480
with open(os.path.expanduser(os.path.expandvars
481
(section["secfile"])),
482
"rb") as secfile:
483
client["secret"] = secfile.read()
484
else:
485
raise TypeError("No secret or secfile for section %s"
486
% section)
487
client["timeout"] = string_to_delta(section["timeout"])
488
client["extended_timeout"] = string_to_delta(
489
section["extended_timeout"])
490
client["interval"] = string_to_delta(section["interval"])
491
client["approval_delay"] = string_to_delta(
492
section["approval_delay"])
493
client["approval_duration"] = string_to_delta(
494
section["approval_duration"])
495
client["checker_command"] = section["checker"]
496
client["last_approval_request"] = None
497
client["last_checked_ok"] = None
498
client["last_checker_status"] = None
499
if client["enabled"]:
500
client["last_enabled"] = datetime.datetime.utcnow()
501
client["expires"] = (datetime.datetime.utcnow()
502
+ client["timeout"])
503
else:
504
client["last_enabled"] = None
505
client["expires"] = None
506
507
return settings
508
509
510
def __init__(self, settings, name = None):
278
511
"""Note: the 'checker' key in 'config' sets the
279
512
'checker_command' attribute and *not* the 'checker'
280
513
attribute."""
281
514
self.name = name
282
if config is None:
283
config = {}
284
logger.debug(u"Creating client %r", self.name)
515
# adding all client settings
516
for setting, value in settings.iteritems():
517
setattr(self, setting, value)
518
519
logger.debug("Creating client %r", self.name)
285
520
# Uppercase and remove spaces from fingerprint for later
286
521
# comparison purposes with return value from the fingerprint()
287
522
# function
288
self.fingerprint = (config[u"fingerprint"].upper()
289
.replace(u" ", u""))
290
logger.debug(u" Fingerprint: %s", self.fingerprint)
291
if u"secret" in config:
292
self.secret = config[u"secret"].decode(u"base64")
293
elif u"secfile" in config:
294
with open(os.path.expanduser(os.path.expandvars
295
(config[u"secfile"])),
296
"rb") as secfile:
297
self.secret = secfile.read()
298
else:
299
raise TypeError(u"No secret or secfile for client %s"
300
% self.name)
301
self.host = config.get(u"host", u"")
302
self.created = datetime.datetime.utcnow()
303
self.enabled = False
304
self.last_enabled = None
305
self.last_checked_ok = None
306
self.timeout = string_to_delta(config[u"timeout"])
307
self.interval = string_to_delta(config[u"interval"])
308
self.disable_hook = disable_hook
523
logger.debug(" Fingerprint: %s", self.fingerprint)
524
self.created = settings.get("created", datetime.datetime.utcnow())
525
526
# attributes specific for this server instance
309
527
self.checker = None
310
528
self.checker_initiator_tag = None
311
529
self.disable_initiator_tag = None
312
530
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
314
531
self.current_checker_command = None
315
self.last_connect = None
532
self.approved = None
533
self.approvals_pending = 0
534
self.changedstate = (multiprocessing_manager
535
.Condition(multiprocessing_manager
536
.Lock()))
537
self.client_structure = [attr for attr in
538
self.__dict__.iterkeys()
539
if not attr.startswith("_")]
540
self.client_structure.append("client_structure")
541
542
for name, t in inspect.getmembers(type(self),
543
lambda obj:
544
isinstance(obj,
545
property)):
546
if not name.startswith("_"):
547
self.client_structure.append(name)
548
549
# Send notice to process children that client state has changed
550
def send_changedstate(self):
551
with self.changedstate:
552
self.changedstate.notify_all()
316
553
317
554
def enable(self):
318
555
"""Start this client's checker and timeout hooks"""
319
if getattr(self, u"enabled", False):
556
if getattr(self, "enabled", False):
320
557
# Already enabled
321
558
return
559
self.send_changedstate()
560
self.expires = datetime.datetime.utcnow() + self.timeout
561
self.enabled = True
322
562
self.last_enabled = datetime.datetime.utcnow()
563
self.init_checker()
564
565
def disable(self, quiet=True):
566
"""Disable this client."""
567
if not getattr(self, "enabled", False):
568
return False
569
if not quiet:
570
self.send_changedstate()
571
if not quiet:
572
logger.info("Disabling client %s", self.name)
573
if getattr(self, "disable_initiator_tag", False):
574
gobject.source_remove(self.disable_initiator_tag)
575
self.disable_initiator_tag = None
576
self.expires = None
577
if getattr(self, "checker_initiator_tag", False):
578
gobject.source_remove(self.checker_initiator_tag)
579
self.checker_initiator_tag = None
580
self.stop_checker()
581
self.enabled = False
582
# Do not run this again if called by a gobject.timeout_add
583
return False
584
585
def __del__(self):
586
self.disable()
587
588
def init_checker(self):
323
589
# Schedule a new checker to be started an 'interval' from now,
324
590
# and every interval from then on.
325
591
self.checker_initiator_tag = (gobject.timeout_add
329
595
self.disable_initiator_tag = (gobject.timeout_add
330
596
(self.timeout_milliseconds(),
331
597
self.disable))
332
self.enabled = True
333
598
# Also start a new checker *right now*.
334
599
self.start_checker()
335
600
336
def disable(self, quiet=True):
337
"""Disable this client."""
338
if not getattr(self, "enabled", False):
339
return False
340
if not quiet:
341
logger.info(u"Disabling client %s", self.name)
342
if getattr(self, u"disable_initiator_tag", False):
343
gobject.source_remove(self.disable_initiator_tag)
344
self.disable_initiator_tag = None
345
if getattr(self, u"checker_initiator_tag", False):
346
gobject.source_remove(self.checker_initiator_tag)
347
self.checker_initiator_tag = None
348
self.stop_checker()
349
if self.disable_hook:
350
self.disable_hook(self)
351
self.enabled = False
352
# Do not run this again if called by a gobject.timeout_add
353
return False
354
355
def __del__(self):
356
self.disable_hook = None
357
self.disable()
358
359
601
def checker_callback(self, pid, condition, command):
360
602
"""The checker has completed, so take appropriate actions."""
361
603
self.checker_callback_tag = None
362
604
self.checker = None
363
605
if os.WIFEXITED(condition):
364
exitstatus = os.WEXITSTATUS(condition)
365
if exitstatus == 0:
366
logger.info(u"Checker for %(name)s succeeded",
606
self.last_checker_status = os.WEXITSTATUS(condition)
607
if self.last_checker_status == 0:
608
logger.info("Checker for %(name)s succeeded",
367
609
vars(self))
368
610
self.checked_ok()
369
611
else:
370
logger.info(u"Checker for %(name)s failed",
612
logger.info("Checker for %(name)s failed",
371
613
vars(self))
372
614
else:
373
logger.warning(u"Checker for %(name)s crashed?",
615
self.last_checker_status = -1
616
logger.warning("Checker for %(name)s crashed?",
374
617
vars(self))
375
618
376
def checked_ok(self):
619
def checked_ok(self, timeout=None):
377
620
"""Bump up the timeout for this client.
378
621
379
622
This should only be called when the client has been seen,
380
623
alive and well.
381
624
"""
625
if timeout is None:
626
timeout = self.timeout
382
627
self.last_checked_ok = datetime.datetime.utcnow()
383
gobject.source_remove(self.disable_initiator_tag)
384
self.disable_initiator_tag = (gobject.timeout_add
385
(self.timeout_milliseconds(),
386
self.disable))
628
if self.disable_initiator_tag is not None:
629
gobject.source_remove(self.disable_initiator_tag)
630
if getattr(self, "enabled", False):
631
self.disable_initiator_tag = (gobject.timeout_add
632
(timedelta_to_milliseconds
633
(timeout), self.disable))
634
self.expires = datetime.datetime.utcnow() + timeout
635
636
def need_approval(self):
637
self.last_approval_request = datetime.datetime.utcnow()
387
638
388
639
def start_checker(self):
389
640
"""Start a new checker subprocess if one is not running.
402
653
# If a checker exists, make sure it is not a zombie
403
654
try:
404
655
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
405
except (AttributeError, OSError), error:
656
except (AttributeError, OSError) as error:
406
657
if (isinstance(error, OSError)
407
658
and error.errno != errno.ECHILD):
408
659
raise error
409
660
else:
410
661
if pid:
411
logger.warning(u"Checker was a zombie")
662
logger.warning("Checker was a zombie")
412
663
gobject.source_remove(self.checker_callback_tag)
413
664
self.checker_callback(pid, status,
414
665
self.current_checker_command)
419
670
command = self.checker_command % self.host
420
671
except TypeError:
421
672
# Escape attributes for the shell
422
escaped_attrs = dict((key,
423
re.escape(unicode(str(val),
424
errors=
425
u'replace')))
426
for key, val in
427
vars(self).iteritems())
673
escaped_attrs = dict(
674
(attr,
675
re.escape(unicode(str(getattr(self, attr, "")),
676
errors=
677
'replace')))
678
for attr in
679
self.runtime_expansions)
680
428
681
try:
429
682
command = self.checker_command % escaped_attrs
430
except TypeError, error:
431
logger.error(u'Could not format string "%s":'
432
u' %s', self.checker_command, error)
683
except TypeError as error:
684
logger.error('Could not format string "%s":'
685
' %s', self.checker_command, error)
433
686
return True # Try again later
434
687
self.current_checker_command = command
435
688
try:
436
logger.info(u"Starting checker %r for %s",
689
logger.info("Starting checker %r for %s",
437
690
command, self.name)
438
691
# We don't need to redirect stdout and stderr, since
439
692
# in normal mode, that is already done by daemon(),
441
694
# always replaced by /dev/null.)
442
695
self.checker = subprocess.Popen(command,
443
696
close_fds=True,
444
shell=True, cwd=u"/")
697
shell=True, cwd="/")
445
698
self.checker_callback_tag = (gobject.child_watch_add
446
699
(self.checker.pid,
447
700
self.checker_callback,
452
705
if pid:
453
706
gobject.source_remove(self.checker_callback_tag)
454
707
self.checker_callback(pid, status, command)
455
except OSError, error:
456
logger.error(u"Failed to start subprocess: %s",
708
except OSError as error:
709
logger.error("Failed to start subprocess: %s",
457
710
error)
458
711
# Re-run this periodically if run by gobject.timeout_add
459
712
return True
463
716
if self.checker_callback_tag:
464
717
gobject.source_remove(self.checker_callback_tag)
465
718
self.checker_callback_tag = None
466
if getattr(self, u"checker", None) is None:
719
if getattr(self, "checker", None) is None:
467
720
return
468
logger.debug(u"Stopping checker for %(name)s", vars(self))
721
logger.debug("Stopping checker for %(name)s", vars(self))
469
722
try:
470
723
os.kill(self.checker.pid, signal.SIGTERM)
471
724
#time.sleep(0.5)
472
725
#if self.checker.poll() is None:
473
726
# os.kill(self.checker.pid, signal.SIGKILL)
474
except OSError, error:
727
except OSError as error:
475
728
if error.errno != errno.ESRCH: # No such process
476
729
raise
477
730
self.checker = None
478
731
479
732
480
def dbus_service_property(dbus_interface, signature=u"v",
481
access=u"readwrite", byte_arrays=False):
733
def dbus_service_property(dbus_interface, signature="v",
734
access="readwrite", byte_arrays=False):
482
735
"""Decorators for marking methods of a DBusObjectWithProperties to
483
736
become properties on the D-Bus.
484
737
491
744
"""
492
745
# Encoding deeply encoded byte arrays is not supported yet by the
493
746
# "Set" method, so we fail early here:
494
if byte_arrays and signature != u"ay":
495
raise ValueError(u"Byte arrays not supported for non-'ay'"
496
u" signature %r" % signature)
747
if byte_arrays and signature != "ay":
748
raise ValueError("Byte arrays not supported for non-'ay'"
749
" signature %r" % signature)
497
750
def decorator(func):
498
751
func._dbus_is_property = True
499
752
func._dbus_interface = dbus_interface
500
753
func._dbus_signature = signature
501
754
func._dbus_access = access
502
755
func._dbus_name = func.__name__
503
if func._dbus_name.endswith(u"_dbus_property"):
756
if func._dbus_name.endswith("_dbus_property"):
504
757
func._dbus_name = func._dbus_name[:-14]
505
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
758
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
506
759
return func
507
760
return decorator
508
761
528
781
529
782
class DBusObjectWithProperties(dbus.service.Object):
530
783
"""A D-Bus object with properties.
531
784
532
785
Classes inheriting from this can use the dbus_service_property
533
786
decorator to expose methods as D-Bus properties. It exposes the
534
787
standard Get(), Set(), and GetAll() methods on the D-Bus.
536
789
537
790
@staticmethod
538
791
def _is_dbus_property(obj):
539
return getattr(obj, u"_dbus_is_property", False)
792
return getattr(obj, "_dbus_is_property", False)
540
793
541
794
def _get_all_dbus_properties(self):
542
795
"""Returns a generator of (name, attribute) pairs
543
796
"""
544
return ((prop._dbus_name, prop)
797
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
798
for cls in self.__class__.__mro__
545
799
for name, prop in
546
inspect.getmembers(self, self._is_dbus_property))
800
inspect.getmembers(cls, self._is_dbus_property))
547
801
548
802
def _get_dbus_property(self, interface_name, property_name):
549
803
"""Returns a bound method if one exists which is a D-Bus
550
804
property with the specified name and interface.
551
805
"""
552
for name in (property_name,
553
property_name + u"_dbus_property"):
554
prop = getattr(self, name, None)
555
if (prop is None
556
or not self._is_dbus_property(prop)
557
or prop._dbus_name != property_name
558
or (interface_name and prop._dbus_interface
559
and interface_name != prop._dbus_interface)):
560
continue
561
return prop
806
for cls in self.__class__.__mro__:
807
for name, value in (inspect.getmembers
808
(cls, self._is_dbus_property)):
809
if (value._dbus_name == property_name
810
and value._dbus_interface == interface_name):
811
return value.__get__(self)
812
562
813
# No such property
563
raise DBusPropertyNotFound(self.dbus_object_path + u":"
564
+ interface_name + u"."
814
raise DBusPropertyNotFound(self.dbus_object_path + ":"
815
+ interface_name + "."
565
816
+ property_name)
566
817
567
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
568
out_signature=u"v")
818
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
819
out_signature="v")
569
820
def Get(self, interface_name, property_name):
570
821
"""Standard D-Bus property Get() method, see D-Bus standard.
571
822
"""
572
823
prop = self._get_dbus_property(interface_name, property_name)
573
if prop._dbus_access == u"write":
824
if prop._dbus_access == "write":
574
825
raise DBusPropertyAccessException(property_name)
575
826
value = prop()
576
if not hasattr(value, u"variant_level"):
827
if not hasattr(value, "variant_level"):
577
828
return value
578
829
return type(value)(value, variant_level=value.variant_level+1)
579
830
580
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
831
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
581
832
def Set(self, interface_name, property_name, value):
582
833
"""Standard D-Bus property Set() method, see D-Bus standard.
583
834
"""
584
835
prop = self._get_dbus_property(interface_name, property_name)
585
if prop._dbus_access == u"read":
836
if prop._dbus_access == "read":
586
837
raise DBusPropertyAccessException(property_name)
587
if prop._dbus_get_args_options[u"byte_arrays"]:
838
if prop._dbus_get_args_options["byte_arrays"]:
588
839
# The byte_arrays option is not supported yet on
589
840
# signatures other than "ay".
590
if prop._dbus_signature != u"ay":
841
if prop._dbus_signature != "ay":
591
842
raise ValueError
592
843
value = dbus.ByteArray(''.join(unichr(byte)
593
844
for byte in value))
594
845
prop(value)
595
846
596
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
597
out_signature=u"a{sv}")
847
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
848
out_signature="a{sv}")
598
849
def GetAll(self, interface_name):
599
850
"""Standard D-Bus property GetAll() method, see D-Bus
600
851
standard.
601
852
602
853
Note: Will not include properties with access="write".
603
854
"""
604
all = {}
855
properties = {}
605
856
for name, prop in self._get_all_dbus_properties():
606
857
if (interface_name
607
858
and interface_name != prop._dbus_interface):
608
859
# Interface non-empty but did not match
609
860
continue
610
861
# Ignore write-only properties
611
if prop._dbus_access == u"write":
862
if prop._dbus_access == "write":
612
863
continue
613
864
value = prop()
614
if not hasattr(value, u"variant_level"):
615
all[name] = value
865
if not hasattr(value, "variant_level"):
866
properties[name] = value
616
867
continue
617
all[name] = type(value)(value, variant_level=
618
value.variant_level+1)
619
return dbus.Dictionary(all, signature=u"sv")
868
properties[name] = type(value)(value, variant_level=
869
value.variant_level+1)
870
return dbus.Dictionary(properties, signature="sv")
620
871
621
872
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
622
out_signature=u"s",
873
out_signature="s",
623
874
path_keyword='object_path',
624
875
connection_keyword='connection')
625
876
def Introspect(self, object_path, connection):
630
881
try:
631
882
document = xml.dom.minidom.parseString(xmlstring)
632
883
def make_tag(document, name, prop):
633
e = document.createElement(u"property")
634
e.setAttribute(u"name", name)
635
e.setAttribute(u"type", prop._dbus_signature)
636
e.setAttribute(u"access", prop._dbus_access)
884
e = document.createElement("property")
885
e.setAttribute("name", name)
886
e.setAttribute("type", prop._dbus_signature)
887
e.setAttribute("access", prop._dbus_access)
637
888
return e
638
for if_tag in document.getElementsByTagName(u"interface"):
889
for if_tag in document.getElementsByTagName("interface"):
639
890
for tag in (make_tag(document, name, prop)
640
891
for name, prop
641
892
in self._get_all_dbus_properties()
642
893
if prop._dbus_interface
643
== if_tag.getAttribute(u"name")):
894
== if_tag.getAttribute("name")):
644
895
if_tag.appendChild(tag)
645
896
# Add the names to the return values for the
646
897
# "org.freedesktop.DBus.Properties" methods
647
if (if_tag.getAttribute(u"name")
648
== u"org.freedesktop.DBus.Properties"):
649
for cn in if_tag.getElementsByTagName(u"method"):
650
if cn.getAttribute(u"name") == u"Get":
651
for arg in cn.getElementsByTagName(u"arg"):
652
if (arg.getAttribute(u"direction")
653
== u"out"):
654
arg.setAttribute(u"name", u"value")
655
elif cn.getAttribute(u"name") == u"GetAll":
656
for arg in cn.getElementsByTagName(u"arg"):
657
if (arg.getAttribute(u"direction")
658
== u"out"):
659
arg.setAttribute(u"name", u"props")
660
xmlstring = document.toxml(u"utf-8")
898
if (if_tag.getAttribute("name")
899
== "org.freedesktop.DBus.Properties"):
900
for cn in if_tag.getElementsByTagName("method"):
901
if cn.getAttribute("name") == "Get":
902
for arg in cn.getElementsByTagName("arg"):
903
if (arg.getAttribute("direction")
904
== "out"):
905
arg.setAttribute("name", "value")
906
elif cn.getAttribute("name") == "GetAll":
907
for arg in cn.getElementsByTagName("arg"):
908
if (arg.getAttribute("direction")
909
== "out"):
910
arg.setAttribute("name", "props")
911
xmlstring = document.toxml("utf-8")
661
912
document.unlink()
662
913
except (AttributeError, xml.dom.DOMException,
663
xml.parsers.expat.ExpatError), error:
664
logger.error(u"Failed to override Introspection method",
914
xml.parsers.expat.ExpatError) as error:
915
logger.error("Failed to override Introspection method",
665
916
error)
666
917
return xmlstring
667
918
668
919
920
def datetime_to_dbus (dt, variant_level=0):
921
"""Convert a UTC datetime.datetime() to a D-Bus type."""
922
if dt is None:
923
return dbus.String("", variant_level = variant_level)
924
return dbus.String(dt.isoformat(),
925
variant_level=variant_level)
926
927
928
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
929
.__metaclass__):
930
"""Applied to an empty subclass of a D-Bus object, this metaclass
931
will add additional D-Bus attributes matching a certain pattern.
932
"""
933
def __new__(mcs, name, bases, attr):
934
# Go through all the base classes which could have D-Bus
935
# methods, signals, or properties in them
936
for base in (b for b in bases
937
if issubclass(b, dbus.service.Object)):
938
# Go though all attributes of the base class
939
for attrname, attribute in inspect.getmembers(base):
940
# Ignore non-D-Bus attributes, and D-Bus attributes
941
# with the wrong interface name
942
if (not hasattr(attribute, "_dbus_interface")
943
or not attribute._dbus_interface
944
.startswith("se.recompile.Mandos")):
945
continue
946
# Create an alternate D-Bus interface name based on
947
# the current name
948
alt_interface = (attribute._dbus_interface
949
.replace("se.recompile.Mandos",
950
"se.bsnet.fukt.Mandos"))
951
# Is this a D-Bus signal?
952
if getattr(attribute, "_dbus_is_signal", False):
953
# Extract the original non-method function by
954
# black magic
955
nonmethod_func = (dict(
956
zip(attribute.func_code.co_freevars,
957
attribute.__closure__))["func"]
958
.cell_contents)
959
# Create a new, but exactly alike, function
960
# object, and decorate it to be a new D-Bus signal
961
# with the alternate D-Bus interface name
962
new_function = (dbus.service.signal
963
(alt_interface,
964
attribute._dbus_signature)
965
(types.FunctionType(
966
nonmethod_func.func_code,
967
nonmethod_func.func_globals,
968
nonmethod_func.func_name,
969
nonmethod_func.func_defaults,
970
nonmethod_func.func_closure)))
971
# Define a creator of a function to call both the
972
# old and new functions, so both the old and new
973
# signals gets sent when the function is called
974
def fixscope(func1, func2):
975
"""This function is a scope container to pass
976
func1 and func2 to the "call_both" function
977
outside of its arguments"""
978
def call_both(*args, **kwargs):
979
"""This function will emit two D-Bus
980
signals by calling func1 and func2"""
981
func1(*args, **kwargs)
982
func2(*args, **kwargs)
983
return call_both
984
# Create the "call_both" function and add it to
985
# the class
986
attr[attrname] = fixscope(attribute,
987
new_function)
988
# Is this a D-Bus method?
989
elif getattr(attribute, "_dbus_is_method", False):
990
# Create a new, but exactly alike, function
991
# object. Decorate it to be a new D-Bus method
992
# with the alternate D-Bus interface name. Add it
993
# to the class.
994
attr[attrname] = (dbus.service.method
995
(alt_interface,
996
attribute._dbus_in_signature,
997
attribute._dbus_out_signature)
998
(types.FunctionType
999
(attribute.func_code,
1000
attribute.func_globals,
1001
attribute.func_name,
1002
attribute.func_defaults,
1003
attribute.func_closure)))
1004
# Is this a D-Bus property?
1005
elif getattr(attribute, "_dbus_is_property", False):
1006
# Create a new, but exactly alike, function
1007
# object, and decorate it to be a new D-Bus
1008
# property with the alternate D-Bus interface
1009
# name. Add it to the class.
1010
attr[attrname] = (dbus_service_property
1011
(alt_interface,
1012
attribute._dbus_signature,
1013
attribute._dbus_access,
1014
attribute
1015
._dbus_get_args_options
1016
["byte_arrays"])
1017
(types.FunctionType
1018
(attribute.func_code,
1019
attribute.func_globals,
1020
attribute.func_name,
1021
attribute.func_defaults,
1022
attribute.func_closure)))
1023
return type.__new__(mcs, name, bases, attr)
1024
1025
669
1026
class ClientDBus(Client, DBusObjectWithProperties):
670
1027
"""A Client class using D-Bus
671
1028
673
1030
dbus_object_path: dbus.ObjectPath
674
1031
bus: dbus.SystemBus()
675
1032
"""
1033
1034
runtime_expansions = (Client.runtime_expansions
1035
+ ("dbus_object_path",))
1036
676
1037
# dbus.service.Object doesn't use super(), so we can't either.
677
1038
678
1039
def __init__(self, bus = None, *args, **kwargs):
679
1040
self.bus = bus
680
1041
Client.__init__(self, *args, **kwargs)
1042
self._approvals_pending = 0
1043
1044
self._approvals_pending = 0
681
1045
# Only now, when this client is initialized, can it show up on
682
1046
# the D-Bus
1047
client_object_name = unicode(self.name).translate(
1048
{ord("."): ord("_"),
1049
ord("-"): ord("_")})
683
1050
self.dbus_object_path = (dbus.ObjectPath
684
(u"/clients/"
685
+ self.name.replace(u".", u"_")))
1051
("/clients/" + client_object_name))
686
1052
DBusObjectWithProperties.__init__(self, self.bus,
687
1053
self.dbus_object_path)
688
689
@staticmethod
690
def _datetime_to_dbus(dt, variant_level=0):
691
"""Convert a UTC datetime.datetime() to a D-Bus type."""
692
return dbus.String(dt.isoformat(),
693
variant_level=variant_level)
694
695
def enable(self):
696
oldstate = getattr(self, u"enabled", False)
697
r = Client.enable(self)
698
if oldstate != self.enabled:
699
# Emit D-Bus signals
700
self.PropertyChanged(dbus.String(u"enabled"),
701
dbus.Boolean(True, variant_level=1))
702
self.PropertyChanged(
703
dbus.String(u"last_enabled"),
704
self._datetime_to_dbus(self.last_enabled,
705
variant_level=1))
706
return r
707
708
def disable(self, quiet = False):
709
oldstate = getattr(self, u"enabled", False)
710
r = Client.disable(self, quiet=quiet)
711
if not quiet and oldstate != self.enabled:
712
# Emit D-Bus signal
713
self.PropertyChanged(dbus.String(u"enabled"),
714
dbus.Boolean(False, variant_level=1))
715
return r
1054
1055
def notifychangeproperty(transform_func,
1056
dbus_name, type_func=lambda x: x,
1057
variant_level=1):
1058
""" Modify a variable so that it's a property which announces
1059
its changes to DBus.
1060
1061
transform_fun: Function that takes a value and a variant_level
1062
and transforms it to a D-Bus type.
1063
dbus_name: D-Bus name of the variable
1064
type_func: Function that transform the value before sending it
1065
to the D-Bus. Default: no transform
1066
variant_level: D-Bus variant level. Default: 1
1067
"""
1068
attrname = "_{0}".format(dbus_name)
1069
def setter(self, value):
1070
if hasattr(self, "dbus_object_path"):
1071
if (not hasattr(self, attrname) or
1072
type_func(getattr(self, attrname, None))
1073
!= type_func(value)):
1074
dbus_value = transform_func(type_func(value),
1075
variant_level
1076
=variant_level)
1077
self.PropertyChanged(dbus.String(dbus_name),
1078
dbus_value)
1079
setattr(self, attrname, value)
1080
1081
return property(lambda self: getattr(self, attrname), setter)
1082
1083
1084
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1085
approvals_pending = notifychangeproperty(dbus.Boolean,
1086
"ApprovalPending",
1087
type_func = bool)
1088
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1089
last_enabled = notifychangeproperty(datetime_to_dbus,
1090
"LastEnabled")
1091
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1092
type_func = lambda checker:
1093
checker is not None)
1094
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1095
"LastCheckedOK")
1096
last_approval_request = notifychangeproperty(
1097
datetime_to_dbus, "LastApprovalRequest")
1098
approved_by_default = notifychangeproperty(dbus.Boolean,
1099
"ApprovedByDefault")
1100
approval_delay = notifychangeproperty(dbus.UInt64,
1101
"ApprovalDelay",
1102
type_func =
1103
timedelta_to_milliseconds)
1104
approval_duration = notifychangeproperty(
1105
dbus.UInt64, "ApprovalDuration",
1106
type_func = timedelta_to_milliseconds)
1107
host = notifychangeproperty(dbus.String, "Host")
1108
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1109
type_func =
1110
timedelta_to_milliseconds)
1111
extended_timeout = notifychangeproperty(
1112
dbus.UInt64, "ExtendedTimeout",
1113
type_func = timedelta_to_milliseconds)
1114
interval = notifychangeproperty(dbus.UInt64,
1115
"Interval",
1116
type_func =
1117
timedelta_to_milliseconds)
1118
checker_command = notifychangeproperty(dbus.String, "Checker")
1119
1120
del notifychangeproperty
716
1121
717
1122
def __del__(self, *args, **kwargs):
718
1123
try:
719
1124
self.remove_from_connection()
720
1125
except LookupError:
721
1126
pass
722
if hasattr(DBusObjectWithProperties, u"__del__"):
1127
if hasattr(DBusObjectWithProperties, "__del__"):
723
1128
DBusObjectWithProperties.__del__(self, *args, **kwargs)
724
1129
Client.__del__(self, *args, **kwargs)
725
1130
727
1132
*args, **kwargs):
728
1133
self.checker_callback_tag = None
729
1134
self.checker = None
730
# Emit D-Bus signal
731
self.PropertyChanged(dbus.String(u"checker_running"),
732
dbus.Boolean(False, variant_level=1))
733
1135
if os.WIFEXITED(condition):
734
1136
exitstatus = os.WEXITSTATUS(condition)
735
1137
# Emit D-Bus signal
745
1147
return Client.checker_callback(self, pid, condition, command,
746
1148
*args, **kwargs)
747
1149
748
def checked_ok(self, *args, **kwargs):
749
r = Client.checked_ok(self, *args, **kwargs)
750
# Emit D-Bus signal
751
self.PropertyChanged(
752
dbus.String(u"last_checked_ok"),
753
(self._datetime_to_dbus(self.last_checked_ok,
754
variant_level=1)))
755
return r
756
757
1150
def start_checker(self, *args, **kwargs):
758
1151
old_checker = self.checker
759
1152
if self.checker is not None:
766
1159
and old_checker_pid != self.checker.pid):
767
1160
# Emit D-Bus signal
768
1161
self.CheckerStarted(self.current_checker_command)
769
self.PropertyChanged(
770
dbus.String(u"checker_running"),
771
dbus.Boolean(True, variant_level=1))
772
return r
773
774
def stop_checker(self, *args, **kwargs):
775
old_checker = getattr(self, u"checker", None)
776
r = Client.stop_checker(self, *args, **kwargs)
777
if (old_checker is not None
778
and getattr(self, u"checker", None) is None):
779
self.PropertyChanged(dbus.String(u"checker_running"),
780
dbus.Boolean(False, variant_level=1))
781
return r
782
783
## D-Bus methods & signals
784
_interface = u"se.bsnet.fukt.Mandos.Client"
785
786
# CheckedOK - method
787
@dbus.service.method(_interface)
788
def CheckedOK(self):
789
return self.checked_ok()
1162
return r
1163
1164
def _reset_approved(self):
1165
self.approved = None
1166
return False
1167
1168
def approve(self, value=True):
1169
self.send_changedstate()
1170
self.approved = value
1171
gobject.timeout_add(timedelta_to_milliseconds
1172
(self.approval_duration),
1173
self._reset_approved)
1174
1175
1176
## D-Bus methods, signals & properties
1177
_interface = "se.recompile.Mandos.Client"
1178
1179
## Signals
790
1180
791
1181
# CheckerCompleted - signal
792
@dbus.service.signal(_interface, signature=u"nxs")
1182
@dbus.service.signal(_interface, signature="nxs")
793
1183
def CheckerCompleted(self, exitcode, waitstatus, command):
794
1184
"D-Bus signal"
795
1185
pass
796
1186
797
1187
# CheckerStarted - signal
798
@dbus.service.signal(_interface, signature=u"s")
1188
@dbus.service.signal(_interface, signature="s")
799
1189
def CheckerStarted(self, command):
800
1190
"D-Bus signal"
801
1191
pass
802
1192
803
1193
# PropertyChanged - signal
804
@dbus.service.signal(_interface, signature=u"sv")
1194
@dbus.service.signal(_interface, signature="sv")
805
1195
def PropertyChanged(self, property, value):
806
1196
"D-Bus signal"
807
1197
pass
809
1199
# GotSecret - signal
810
1200
@dbus.service.signal(_interface)
811
1201
def GotSecret(self):
812
"D-Bus signal"
1202
"""D-Bus signal
1203
Is sent after a successful transfer of secret from the Mandos
1204
server to mandos-client
1205
"""
813
1206
pass
814
1207
815
1208
# Rejected - signal
816
@dbus.service.signal(_interface)
817
def Rejected(self):
818
"D-Bus signal"
819
pass
1209
@dbus.service.signal(_interface, signature="s")
1210
def Rejected(self, reason):
1211
"D-Bus signal"
1212
pass
1213
1214
# NeedApproval - signal
1215
@dbus.service.signal(_interface, signature="tb")
1216
def NeedApproval(self, timeout, default):
1217
"D-Bus signal"
1218
return self.need_approval()
1219
1220
# NeRwequest - signal
1221
@dbus.service.signal(_interface, signature="s")
1222
def NewRequest(self, ip):
1223
"""D-Bus signal
1224
Is sent after a client request a password.
1225
"""
1226
pass
1227
1228
## Methods
1229
1230
# Approve - method
1231
@dbus.service.method(_interface, in_signature="b")
1232
def Approve(self, value):
1233
self.approve(value)
1234
1235
# CheckedOK - method
1236
@dbus.service.method(_interface)
1237
def CheckedOK(self):
1238
self.checked_ok()
820
1239
821
1240
# Enable - method
822
1241
@dbus.service.method(_interface)
841
1260
def StopChecker(self):
842
1261
self.stop_checker()
843
1262
844
# name - property
845
@dbus_service_property(_interface, signature=u"s", access=u"read")
846
def name_dbus_property(self):
1263
## Properties
1264
1265
# ApprovalPending - property
1266
@dbus_service_property(_interface, signature="b", access="read")
1267
def ApprovalPending_dbus_property(self):
1268
return dbus.Boolean(bool(self.approvals_pending))
1269
1270
# ApprovedByDefault - property
1271
@dbus_service_property(_interface, signature="b",
1272
access="readwrite")
1273
def ApprovedByDefault_dbus_property(self, value=None):
1274
if value is None: # get
1275
return dbus.Boolean(self.approved_by_default)
1276
self.approved_by_default = bool(value)
1277
1278
# ApprovalDelay - property
1279
@dbus_service_property(_interface, signature="t",
1280
access="readwrite")
1281
def ApprovalDelay_dbus_property(self, value=None):
1282
if value is None: # get
1283
return dbus.UInt64(self.approval_delay_milliseconds())
1284
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1285
1286
# ApprovalDuration - property
1287
@dbus_service_property(_interface, signature="t",
1288
access="readwrite")
1289
def ApprovalDuration_dbus_property(self, value=None):
1290
if value is None: # get
1291
return dbus.UInt64(timedelta_to_milliseconds(
1292
self.approval_duration))
1293
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1294
1295
# Name - property
1296
@dbus_service_property(_interface, signature="s", access="read")
1297
def Name_dbus_property(self):
847
1298
return dbus.String(self.name)
848
1299
849
# fingerprint - property
850
@dbus_service_property(_interface, signature=u"s", access=u"read")
851
def fingerprint_dbus_property(self):
1300
# Fingerprint - property
1301
@dbus_service_property(_interface, signature="s", access="read")
1302
def Fingerprint_dbus_property(self):
852
1303
return dbus.String(self.fingerprint)
853
1304
854
# host - property
855
@dbus_service_property(_interface, signature=u"s",
856
access=u"readwrite")
857
def host_dbus_property(self, value=None):
1305
# Host - property
1306
@dbus_service_property(_interface, signature="s",
1307
access="readwrite")
1308
def Host_dbus_property(self, value=None):
858
1309
if value is None: # get
859
1310
return dbus.String(self.host)
860
self.host = value
861
# Emit D-Bus signal
862
self.PropertyChanged(dbus.String(u"host"),
863
dbus.String(value, variant_level=1))
864
865
# created - property
866
@dbus_service_property(_interface, signature=u"s", access=u"read")
867
def created_dbus_property(self):
868
return dbus.String(self._datetime_to_dbus(self.created))
869
870
# last_enabled - property
871
@dbus_service_property(_interface, signature=u"s", access=u"read")
872
def last_enabled_dbus_property(self):
873
if self.last_enabled is None:
874
return dbus.String(u"")
875
return dbus.String(self._datetime_to_dbus(self.last_enabled))
876
877
# enabled - property
878
@dbus_service_property(_interface, signature=u"b",
879
access=u"readwrite")
880
def enabled_dbus_property(self, value=None):
1311
self.host = unicode(value)
1312
1313
# Created - property
1314
@dbus_service_property(_interface, signature="s", access="read")
1315
def Created_dbus_property(self):
1316
return datetime_to_dbus(self.created)
1317
1318
# LastEnabled - property
1319
@dbus_service_property(_interface, signature="s", access="read")
1320
def LastEnabled_dbus_property(self):
1321
return datetime_to_dbus(self.last_enabled)
1322
1323
# Enabled - property
1324
@dbus_service_property(_interface, signature="b",
1325
access="readwrite")
1326
def Enabled_dbus_property(self, value=None):
881
1327
if value is None: # get
882
1328
return dbus.Boolean(self.enabled)
883
1329
if value:
885
1331
else:
886
1332
self.disable()
887
1333
888
# last_checked_ok - property
889
@dbus_service_property(_interface, signature=u"s",
890
access=u"readwrite")
891
def last_checked_ok_dbus_property(self, value=None):
1334
# LastCheckedOK - property
1335
@dbus_service_property(_interface, signature="s",
1336
access="readwrite")
1337
def LastCheckedOK_dbus_property(self, value=None):
892
1338
if value is not None:
893
1339
self.checked_ok()
894
1340
return
895
if self.last_checked_ok is None:
896
return dbus.String(u"")
897
return dbus.String(self._datetime_to_dbus(self
898
.last_checked_ok))
899
900
# timeout - property
901
@dbus_service_property(_interface, signature=u"t",
902
access=u"readwrite")
903
def timeout_dbus_property(self, value=None):
1341
return datetime_to_dbus(self.last_checked_ok)
1342
1343
# Expires - property
1344
@dbus_service_property(_interface, signature="s", access="read")
1345
def Expires_dbus_property(self):
1346
return datetime_to_dbus(self.expires)
1347
1348
# LastApprovalRequest - property
1349
@dbus_service_property(_interface, signature="s", access="read")
1350
def LastApprovalRequest_dbus_property(self):
1351
return datetime_to_dbus(self.last_approval_request)
1352
1353
# Timeout - property
1354
@dbus_service_property(_interface, signature="t",
1355
access="readwrite")
1356
def Timeout_dbus_property(self, value=None):
904
1357
if value is None: # get
905
1358
return dbus.UInt64(self.timeout_milliseconds())
906
1359
self.timeout = datetime.timedelta(0, 0, 0, value)
907
# Emit D-Bus signal
908
self.PropertyChanged(dbus.String(u"timeout"),
909
dbus.UInt64(value, variant_level=1))
910
if getattr(self, u"disable_initiator_tag", None) is None:
1360
if getattr(self, "disable_initiator_tag", None) is None:
911
1361
return
912
1362
# Reschedule timeout
913
1363
gobject.source_remove(self.disable_initiator_tag)
914
1364
self.disable_initiator_tag = None
915
time_to_die = (self.
916
_timedelta_to_milliseconds((self
917
.last_checked_ok
918
+ self.timeout)
919
- datetime.datetime
920
.utcnow()))
1365
self.expires = None
1366
time_to_die = timedelta_to_milliseconds((self
1367
.last_checked_ok
1368
+ self.timeout)
1369
- datetime.datetime
1370
.utcnow())
921
1371
if time_to_die <= 0:
922
1372
# The timeout has passed
923
1373
self.disable()
924
1374
else:
1375
self.expires = (datetime.datetime.utcnow()
1376
+ datetime.timedelta(milliseconds =
1377
time_to_die))
925
1378
self.disable_initiator_tag = (gobject.timeout_add
926
1379
(time_to_die, self.disable))
927
1380
928
# interval - property
929
@dbus_service_property(_interface, signature=u"t",
930
access=u"readwrite")
931
def interval_dbus_property(self, value=None):
1381
# ExtendedTimeout - property
1382
@dbus_service_property(_interface, signature="t",
1383
access="readwrite")
1384
def ExtendedTimeout_dbus_property(self, value=None):
1385
if value is None: # get
1386
return dbus.UInt64(self.extended_timeout_milliseconds())
1387
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1388
1389
# Interval - property
1390
@dbus_service_property(_interface, signature="t",
1391
access="readwrite")
1392
def Interval_dbus_property(self, value=None):
932
1393
if value is None: # get
933
1394
return dbus.UInt64(self.interval_milliseconds())
934
1395
self.interval = datetime.timedelta(0, 0, 0, value)
935
# Emit D-Bus signal
936
self.PropertyChanged(dbus.String(u"interval"),
937
dbus.UInt64(value, variant_level=1))
938
if getattr(self, u"checker_initiator_tag", None) is None:
1396
if getattr(self, "checker_initiator_tag", None) is None:
939
1397
return
940
# Reschedule checker run
941
gobject.source_remove(self.checker_initiator_tag)
942
self.checker_initiator_tag = (gobject.timeout_add
943
(value, self.start_checker))
944
self.start_checker() # Start one now, too
945
946
# checker - property
947
@dbus_service_property(_interface, signature=u"s",
948
access=u"readwrite")
949
def checker_dbus_property(self, value=None):
1398
if self.enabled:
1399
# Reschedule checker run
1400
gobject.source_remove(self.checker_initiator_tag)
1401
self.checker_initiator_tag = (gobject.timeout_add
1402
(value, self.start_checker))
1403
self.start_checker() # Start one now, too
1404
1405
# Checker - property
1406
@dbus_service_property(_interface, signature="s",
1407
access="readwrite")
1408
def Checker_dbus_property(self, value=None):
950
1409
if value is None: # get
951
1410
return dbus.String(self.checker_command)
952
self.checker_command = value
953
# Emit D-Bus signal
954
self.PropertyChanged(dbus.String(u"checker"),
955
dbus.String(self.checker_command,
956
variant_level=1))
1411
self.checker_command = unicode(value)
957
1412
958
# checker_running - property
959
@dbus_service_property(_interface, signature=u"b",
960
access=u"readwrite")
961
def checker_running_dbus_property(self, value=None):
1413
# CheckerRunning - property
1414
@dbus_service_property(_interface, signature="b",
1415
access="readwrite")
1416
def CheckerRunning_dbus_property(self, value=None):
962
1417
if value is None: # get
963
1418
return dbus.Boolean(self.checker is not None)
964
1419
if value:
966
1421
else:
967
1422
self.stop_checker()
968
1423
969
# object_path - property
970
@dbus_service_property(_interface, signature=u"o", access=u"read")
971
def object_path_dbus_property(self):
1424
# ObjectPath - property
1425
@dbus_service_property(_interface, signature="o", access="read")
1426
def ObjectPath_dbus_property(self):
972
1427
return self.dbus_object_path # is already a dbus.ObjectPath
973
1428
974
# secret = property
975
@dbus_service_property(_interface, signature=u"ay",
976
access=u"write", byte_arrays=True)
977
def secret_dbus_property(self, value):
1429
# Secret = property
1430
@dbus_service_property(_interface, signature="ay",
1431
access="write", byte_arrays=True)
1432
def Secret_dbus_property(self, value):
978
1433
self.secret = str(value)
979
1434
980
1435
del _interface
981
1436
982
1437
1438
class ProxyClient(object):
1439
def __init__(self, child_pipe, fpr, address):
1440
self._pipe = child_pipe
1441
self._pipe.send(('init', fpr, address))
1442
if not self._pipe.recv():
1443
raise KeyError()
1444
1445
def __getattribute__(self, name):
1446
if name == '_pipe':
1447
return super(ProxyClient, self).__getattribute__(name)
1448
self._pipe.send(('getattr', name))
1449
data = self._pipe.recv()
1450
if data[0] == 'data':
1451
return data[1]
1452
if data[0] == 'function':
1453
def func(*args, **kwargs):
1454
self._pipe.send(('funcall', name, args, kwargs))
1455
return self._pipe.recv()[1]
1456
return func
1457
1458
def __setattr__(self, name, value):
1459
if name == '_pipe':
1460
return super(ProxyClient, self).__setattr__(name, value)
1461
self._pipe.send(('setattr', name, value))
1462
1463
1464
class ClientDBusTransitional(ClientDBus):
1465
__metaclass__ = AlternateDBusNamesMetaclass
1466
1467
983
1468
class ClientHandler(socketserver.BaseRequestHandler, object):
984
1469
"""A class to handle client connections.
985
1470
987
1472
Note: This will run in its own forked process."""
988
1473
989
1474
def handle(self):
990
logger.info(u"TCP connection from: %s",
991
unicode(self.client_address))
992
logger.debug(u"IPC Pipe FD: %d", self.server.child_pipe[1])
993
# Open IPC pipe to parent process
994
with contextlib.nested(os.fdopen(self.server.child_pipe[1],
995
u"w", 1),
996
os.fdopen(self.server.parent_pipe[0],
997
u"r", 0)) as (ipc,
998
ipc_return):
1475
with contextlib.closing(self.server.child_pipe) as child_pipe:
1476
logger.info("TCP connection from: %s",
1477
unicode(self.client_address))
1478
logger.debug("Pipe FD: %d",
1479
self.server.child_pipe.fileno())
1480
999
1481
session = (gnutls.connection
1000
1482
.ClientSession(self.request,
1001
1483
gnutls.connection
1002
1484
.X509Credentials()))
1003
1485
1004
line = self.request.makefile().readline()
1005
logger.debug(u"Protocol version: %r", line)
1006
try:
1007
if int(line.strip().split()[0]) > 1:
1008
raise RuntimeError
1009
except (ValueError, IndexError, RuntimeError), error:
1010
logger.error(u"Unknown protocol version: %s", error)
1011
return
1012
1013
1486
# Note: gnutls.connection.X509Credentials is really a
1014
1487
# generic GnuTLS certificate credentials object so long as
1015
1488
# no X.509 keys are added to it. Therefore, we can use it
1016
1489
# here despite using OpenPGP certificates.
1017
1490
1018
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1019
# u"+AES-256-CBC", u"+SHA1",
1020
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1021
# u"+DHE-DSS"))
1491
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1492
# "+AES-256-CBC", "+SHA1",
1493
# "+COMP-NULL", "+CTYPE-OPENPGP",
1494
# "+DHE-DSS"))
1022
1495
# Use a fallback default, since this MUST be set.
1023
1496
priority = self.server.gnutls_priority
1024
1497
if priority is None:
1025
priority = u"NORMAL"
1498
priority = "NORMAL"
1026
1499
(gnutls.library.functions
1027
1500
.gnutls_priority_set_direct(session._c_object,
1028
1501
priority, None))
1029
1502
1503
# Start communication using the Mandos protocol
1504
# Get protocol number
1505
line = self.request.makefile().readline()
1506
logger.debug("Protocol version: %r", line)
1507
try:
1508
if int(line.strip().split()[0]) > 1:
1509
raise RuntimeError
1510
except (ValueError, IndexError, RuntimeError) as error:
1511
logger.error("Unknown protocol version: %s", error)
1512
return
1513
1514
# Start GnuTLS connection
1030
1515
try:
1031
1516
session.handshake()
1032
except gnutls.errors.GNUTLSError, error:
1033
logger.warning(u"Handshake failed: %s", error)
1517
except gnutls.errors.GNUTLSError as error:
1518
logger.warning("Handshake failed: %s", error)
1034
1519
# Do not run session.bye() here: the session is not
1035
1520
# established. Just abandon the request.
1036
1521
return
1037
logger.debug(u"Handshake succeeded")
1522
logger.debug("Handshake succeeded")
1523
1524
approval_required = False
1038
1525
try:
1039
1526
try:
1040
1527
fpr = self.fingerprint(self.peer_certificate
1041
1528
(session))
1042
except (TypeError, gnutls.errors.GNUTLSError), error:
1043
logger.warning(u"Bad certificate: %s", error)
1044
return
1045
logger.debug(u"Fingerprint: %s", fpr)
1046
1047
for c in self.server.clients:
1048
if c.fingerprint == fpr:
1049
client = c
1529
except (TypeError,
1530
gnutls.errors.GNUTLSError) as error:
1531
logger.warning("Bad certificate: %s", error)
1532
return
1533
logger.debug("Fingerprint: %s", fpr)
1534
1535
try:
1536
client = ProxyClient(child_pipe, fpr,
1537
self.client_address)
1538
except KeyError:
1539
return
1540
1541
if self.server.use_dbus:
1542
# Emit D-Bus signal
1543
client.NewRequest(str(self.client_address))
1544
1545
if client.approval_delay:
1546
delay = client.approval_delay
1547
client.approvals_pending += 1
1548
approval_required = True
1549
1550
while True:
1551
if not client.enabled:
1552
logger.info("Client %s is disabled",
1553
client.name)
1554
if self.server.use_dbus:
1555
# Emit D-Bus signal
1556
client.Rejected("Disabled")
1557
return
1558
1559
if client.approved or not client.approval_delay:
1560
#We are approved or approval is disabled
1050
1561
break
1051
else:
1052
ipc.write(u"NOTFOUND %s %s\n"
1053
% (fpr, unicode(self.client_address)))
1054
return
1055
# Have to check if client.enabled, since it is
1056
# possible that the client was disabled since the
1057
# GnuTLS session was established.
1058
ipc.write(u"GETATTR enabled %s\n" % fpr)
1059
enabled = pickle.load(ipc_return)
1060
if not enabled:
1061
ipc.write(u"DISABLED %s\n" % client.name)
1062
return
1063
ipc.write(u"SENDING %s\n" % client.name)
1562
elif client.approved is None:
1563
logger.info("Client %s needs approval",
1564
client.name)
1565
if self.server.use_dbus:
1566
# Emit D-Bus signal
1567
client.NeedApproval(
1568
client.approval_delay_milliseconds(),
1569
client.approved_by_default)
1570
else:
1571
logger.warning("Client %s was not approved",
1572
client.name)
1573
if self.server.use_dbus:
1574
# Emit D-Bus signal
1575
client.Rejected("Denied")
1576
return
1577
1578
#wait until timeout or approved
1579
time = datetime.datetime.now()
1580
client.changedstate.acquire()
1581
(client.changedstate.wait
1582
(float(client.timedelta_to_milliseconds(delay)
1583
/ 1000)))
1584
client.changedstate.release()
1585
time2 = datetime.datetime.now()
1586
if (time2 - time) >= delay:
1587
if not client.approved_by_default:
1588
logger.warning("Client %s timed out while"
1589
" waiting for approval",
1590
client.name)
1591
if self.server.use_dbus:
1592
# Emit D-Bus signal
1593
client.Rejected("Approval timed out")
1594
return
1595
else:
1596
break
1597
else:
1598
delay -= time2 - time
1599
1064
1600
sent_size = 0
1065
1601
while sent_size < len(client.secret):
1066
sent = session.send(client.secret[sent_size:])
1067
logger.debug(u"Sent: %d, remaining: %d",
1602
try:
1603
sent = session.send(client.secret[sent_size:])
1604
except gnutls.errors.GNUTLSError as error:
1605
logger.warning("gnutls send failed")
1606
return
1607
logger.debug("Sent: %d, remaining: %d",
1068
1608
sent, len(client.secret)
1069
1609
- (sent_size + sent))
1070
1610
sent_size += sent
1611
1612
logger.info("Sending secret to %s", client.name)
1613
# bump the timeout using extended_timeout
1614
client.checked_ok(client.extended_timeout)
1615
if self.server.use_dbus:
1616
# Emit D-Bus signal
1617
client.GotSecret()
1618
1071
1619
finally:
1072
session.bye()
1620
if approval_required:
1621
client.approvals_pending -= 1
1622
try:
1623
session.bye()
1624
except gnutls.errors.GNUTLSError as error:
1625
logger.warning("GnuTLS bye failed")
1073
1626
1074
1627
@staticmethod
1075
1628
def peer_certificate(session):
1085
1638
.gnutls_certificate_get_peers
1086
1639
(session._c_object, ctypes.byref(list_size)))
1087
1640
if not bool(cert_list) and list_size.value != 0:
1088
raise gnutls.errors.GNUTLSError(u"error getting peer"
1089
u" certificate")
1641
raise gnutls.errors.GNUTLSError("error getting peer"
1642
" certificate")
1090
1643
if list_size.value == 0:
1091
1644
return None
1092
1645
cert = cert_list[0]
1118
1671
if crtverify.value != 0:
1119
1672
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1120
1673
raise (gnutls.errors.CertificateSecurityError
1121
(u"Verify failed"))
1674
("Verify failed"))
1122
1675
# New buffer for the fingerprint
1123
1676
buf = ctypes.create_string_buffer(20)
1124
1677
buf_len = ctypes.c_size_t()
1131
1684
# Convert the buffer to a Python bytestring
1132
1685
fpr = ctypes.string_at(buf, buf_len.value)
1133
1686
# Convert the bytestring to hexadecimal notation
1134
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1687
hex_fpr = binascii.hexlify(fpr).upper()
1135
1688
return hex_fpr
1136
1689
1137
1690
1138
class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):
1139
"""Like socketserver.ForkingMixIn, but also pass a pipe pair."""
1691
class MultiprocessingMixIn(object):
1692
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1693
def sub_process_main(self, request, address):
1694
try:
1695
self.finish_request(request, address)
1696
except Exception:
1697
self.handle_error(request, address)
1698
self.close_request(request)
1699
1700
def process_request(self, request, address):
1701
"""Start a new process to process the request."""
1702
proc = multiprocessing.Process(target = self.sub_process_main,
1703
args = (request,
1704
address))
1705
proc.start()
1706
return proc
1707
1708
1709
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1710
""" adds a pipe to the MixIn """
1140
1711
def process_request(self, request, client_address):
1141
1712
"""Overrides and wraps the original process_request().
1142
1713
1143
1714
This function creates a new pipe in self.pipe
1144
1715
"""
1145
self.child_pipe = os.pipe() # Child writes here
1146
self.parent_pipe = os.pipe() # Parent writes here
1147
super(ForkingMixInWithPipes,
1148
self).process_request(request, client_address)
1149
# Close unused ends for parent
1150
os.close(self.parent_pipe[0]) # close read end
1151
os.close(self.child_pipe[1]) # close write end
1152
self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])
1153
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1716
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1717
1718
proc = MultiprocessingMixIn.process_request(self, request,
1719
client_address)
1720
self.child_pipe.close()
1721
self.add_pipe(parent_pipe, proc)
1722
1723
def add_pipe(self, parent_pipe, proc):
1154
1724
"""Dummy function; override as necessary"""
1155
os.close(child_pipe_fd)
1156
os.close(parent_pipe_fd)
1157
1158
1159
class IPv6_TCPServer(ForkingMixInWithPipes,
1725
raise NotImplementedError
1726
1727
1728
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1160
1729
socketserver.TCPServer, object):
1161
1730
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1162
1731
1178
1747
bind to an address or port if they were not specified."""
1179
1748
if self.interface is not None:
1180
1749
if SO_BINDTODEVICE is None:
1181
logger.error(u"SO_BINDTODEVICE does not exist;"
1182
u" cannot bind to interface %s",
1750
logger.error("SO_BINDTODEVICE does not exist;"
1751
" cannot bind to interface %s",
1183
1752
self.interface)
1184
1753
else:
1185
1754
try:
1186
1755
self.socket.setsockopt(socket.SOL_SOCKET,
1187
1756
SO_BINDTODEVICE,
1188
1757
str(self.interface
1189
+ u'\0'))
1190
except socket.error, error:
1758
+ '\0'))
1759
except socket.error as error:
1191
1760
if error[0] == errno.EPERM:
1192
logger.error(u"No permission to"
1193
u" bind to interface %s",
1761
logger.error("No permission to"
1762
" bind to interface %s",
1194
1763
self.interface)
1195
1764
elif error[0] == errno.ENOPROTOOPT:
1196
logger.error(u"SO_BINDTODEVICE not available;"
1197
u" cannot bind to interface %s",
1765
logger.error("SO_BINDTODEVICE not available;"
1766
" cannot bind to interface %s",
1198
1767
self.interface)
1199
1768
else:
1200
1769
raise
1202
1771
if self.server_address[0] or self.server_address[1]:
1203
1772
if not self.server_address[0]:
1204
1773
if self.address_family == socket.AF_INET6:
1205
any_address = u"::" # in6addr_any
1774
any_address = "::" # in6addr_any
1206
1775
else:
1207
1776
any_address = socket.INADDR_ANY
1208
1777
self.server_address = (any_address,
1235
1804
self.enabled = False
1236
1805
self.clients = clients
1237
1806
if self.clients is None:
1238
self.clients = set()
1807
self.clients = {}
1239
1808
self.use_dbus = use_dbus
1240
1809
self.gnutls_priority = gnutls_priority
1241
1810
IPv6_TCPServer.__init__(self, server_address,
1245
1814
def server_activate(self):
1246
1815
if self.enabled:
1247
1816
return socketserver.TCPServer.server_activate(self)
1817
1248
1818
def enable(self):
1249
1819
self.enabled = True
1250
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1820
1821
def add_pipe(self, parent_pipe, proc):
1251
1822
# Call "handle_ipc" for both data and EOF events
1252
gobject.io_add_watch(child_pipe_fd,
1823
gobject.io_add_watch(parent_pipe.fileno(),
1253
1824
gobject.IO_IN | gobject.IO_HUP,
1254
1825
functools.partial(self.handle_ipc,
1255
reply_fd
1256
=parent_pipe_fd))
1257
def handle_ipc(self, source, condition, reply_fd=None,
1258
file_objects={}):
1826
parent_pipe =
1827
parent_pipe,
1828
proc = proc))
1829
1830
def handle_ipc(self, source, condition, parent_pipe=None,
1831
proc = None, client_object=None):
1259
1832
condition_names = {
1260
gobject.IO_IN: u"IN", # There is data to read.
1261
gobject.IO_OUT: u"OUT", # Data can be written (without
1833
gobject.IO_IN: "IN", # There is data to read.
1834
gobject.IO_OUT: "OUT", # Data can be written (without
1262
1835
# blocking).
1263
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1264
gobject.IO_ERR: u"ERR", # Error condition.
1265
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1836
gobject.IO_PRI: "PRI", # There is urgent data to read.
1837
gobject.IO_ERR: "ERR", # Error condition.
1838
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1266
1839
# broken, usually for pipes and
1267
1840
# sockets).
1268
1841
}
1270
1843
for cond, name in
1271
1844
condition_names.iteritems()
1272
1845
if cond & condition)
1273
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1274
conditions_string)
1275
1276
# Turn the pipe file descriptors into Python file objects
1277
if source not in file_objects:
1278
file_objects[source] = os.fdopen(source, u"r", 1)
1279
if reply_fd not in file_objects:
1280
file_objects[reply_fd] = os.fdopen(reply_fd, u"w", 0)
1281
1282
# Read a line from the file object
1283
cmdline = file_objects[source].readline()
1284
if not cmdline: # Empty line means end of file
1285
# close the IPC pipes
1286
file_objects[source].close()
1287
del file_objects[source]
1288
file_objects[reply_fd].close()
1289
del file_objects[reply_fd]
1290
1291
# Stop calling this function
1292
return False
1293
1294
logger.debug(u"IPC command: %r", cmdline)
1295
1296
# Parse and act on command
1297
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1298
1299
if cmd == u"NOTFOUND":
1300
fpr, address = args.split(None, 1)
1301
logger.warning(u"Client not found for fingerprint: %s, ad"
1302
u"dress: %s", fpr, address)
1303
if self.use_dbus:
1304
# Emit D-Bus signal
1305
mandos_dbus_service.ClientNotFound(fpr, address)
1306
elif cmd == u"DISABLED":
1307
for client in self.clients:
1308
if client.name == args:
1309
logger.warning(u"Client %s is disabled", args)
1310
if self.use_dbus:
1311
# Emit D-Bus signal
1312
client.Rejected()
1313
break
1314
else:
1315
logger.error(u"Unknown client %s is disabled", args)
1316
elif cmd == u"SENDING":
1317
for client in self.clients:
1318
if client.name == args:
1319
logger.info(u"Sending secret to %s", client.name)
1320
client.checked_ok()
1321
if self.use_dbus:
1322
# Emit D-Bus signal
1323
client.GotSecret()
1324
break
1325
else:
1326
logger.error(u"Sending secret to unknown client %s",
1327
args)
1328
elif cmd == u"GETATTR":
1329
attr_name, fpr = args.split(None, 1)
1330
for client in self.clients:
1331
if client.fingerprint == fpr:
1332
attr_value = getattr(client, attr_name, None)
1333
logger.debug("IPC reply: %r", attr_value)
1334
pickle.dump(attr_value, file_objects[reply_fd])
1335
break
1336
else:
1337
logger.error(u"Client %s on address %s requesting "
1338
u"attribute %s not found", fpr, address,
1339
attr_name)
1340
pickle.dump(None, file_objects[reply_fd])
1341
else:
1342
logger.error(u"Unknown IPC command: %r", cmdline)
1343
1344
# Keep calling this function
1846
# error, or the other end of multiprocessing.Pipe has closed
1847
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1848
# Wait for other process to exit
1849
proc.join()
1850
return False
1851
1852
# Read a request from the child
1853
request = parent_pipe.recv()
1854
command = request[0]
1855
1856
if command == 'init':
1857
fpr = request[1]
1858
address = request[2]
1859
1860
for c in self.clients.itervalues():
1861
if c.fingerprint == fpr:
1862
client = c
1863
break
1864
else:
1865
logger.info("Client not found for fingerprint: %s, ad"
1866
"dress: %s", fpr, address)
1867
if self.use_dbus:
1868
# Emit D-Bus signal
1869
mandos_dbus_service.ClientNotFound(fpr,
1870
address[0])
1871
parent_pipe.send(False)
1872
return False
1873
1874
gobject.io_add_watch(parent_pipe.fileno(),
1875
gobject.IO_IN | gobject.IO_HUP,
1876
functools.partial(self.handle_ipc,
1877
parent_pipe =
1878
parent_pipe,
1879
proc = proc,
1880
client_object =
1881
client))
1882
parent_pipe.send(True)
1883
# remove the old hook in favor of the new above hook on
1884
# same fileno
1885
return False
1886
if command == 'funcall':
1887
funcname = request[1]
1888
args = request[2]
1889
kwargs = request[3]
1890
1891
parent_pipe.send(('data', getattr(client_object,
1892
funcname)(*args,
1893
**kwargs)))
1894
1895
if command == 'getattr':
1896
attrname = request[1]
1897
if callable(client_object.__getattribute__(attrname)):
1898
parent_pipe.send(('function',))
1899
else:
1900
parent_pipe.send(('data', client_object
1901
.__getattribute__(attrname)))
1902
1903
if command == 'setattr':
1904
attrname = request[1]
1905
value = request[2]
1906
setattr(client_object, attrname, value)
1907
1345
1908
return True
1346
1909
1347
1910
1348
1911
def string_to_delta(interval):
1349
1912
"""Parse a string and return a datetime.timedelta
1350
1913
1351
>>> string_to_delta(u'7d')
1914
>>> string_to_delta('7d')
1352
1915
datetime.timedelta(7)
1353
>>> string_to_delta(u'60s')
1916
>>> string_to_delta('60s')
1354
1917
datetime.timedelta(0, 60)
1355
>>> string_to_delta(u'60m')
1918
>>> string_to_delta('60m')
1356
1919
datetime.timedelta(0, 3600)
1357
>>> string_to_delta(u'24h')
1920
>>> string_to_delta('24h')
1358
1921
datetime.timedelta(1)
1359
>>> string_to_delta(u'1w')
1922
>>> string_to_delta('1w')
1360
1923
datetime.timedelta(7)
1361
>>> string_to_delta(u'5m 30s')
1924
>>> string_to_delta('5m 30s')
1362
1925
datetime.timedelta(0, 330)
1363
1926
"""
1364
1927
timevalue = datetime.timedelta(0)
1366
1929
try:
1367
1930
suffix = unicode(s[-1])
1368
1931
value = int(s[:-1])
1369
if suffix == u"d":
1932
if suffix == "d":
1370
1933
delta = datetime.timedelta(value)
1371
elif suffix == u"s":
1934
elif suffix == "s":
1372
1935
delta = datetime.timedelta(0, value)
1373
elif suffix == u"m":
1936
elif suffix == "m":
1374
1937
delta = datetime.timedelta(0, 0, 0, 0, value)
1375
elif suffix == u"h":
1938
elif suffix == "h":
1376
1939
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1377
elif suffix == u"w":
1940
elif suffix == "w":
1378
1941
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1379
1942
else:
1380
raise ValueError(u"Unknown suffix %r" % suffix)
1381
except (ValueError, IndexError), e:
1382
raise ValueError(e.message)
1943
raise ValueError("Unknown suffix %r" % suffix)
1944
except (ValueError, IndexError) as e:
1945
raise ValueError(*(e.args))
1383
1946
timevalue += delta
1384
1947
return timevalue
1385
1948
1386
1949
1387
def if_nametoindex(interface):
1388
"""Call the C function if_nametoindex(), or equivalent
1389
1390
Note: This function cannot accept a unicode string."""
1391
global if_nametoindex
1392
try:
1393
if_nametoindex = (ctypes.cdll.LoadLibrary
1394
(ctypes.util.find_library(u"c"))
1395
.if_nametoindex)
1396
except (OSError, AttributeError):
1397
logger.warning(u"Doing if_nametoindex the hard way")
1398
def if_nametoindex(interface):
1399
"Get an interface index the hard way, i.e. using fcntl()"
1400
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1401
with contextlib.closing(socket.socket()) as s:
1402
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1403
struct.pack(str(u"16s16x"),
1404
interface))
1405
interface_index = struct.unpack(str(u"I"),
1406
ifreq[16:20])[0]
1407
return interface_index
1408
return if_nametoindex(interface)
1409
1410
1411
1950
def daemon(nochdir = False, noclose = False):
1412
1951
"""See daemon(3). Standard BSD Unix function.
1413
1952
1416
1955
sys.exit()
1417
1956
os.setsid()
1418
1957
if not nochdir:
1419
os.chdir(u"/")
1958
os.chdir("/")
1420
1959
if os.fork():
1421
1960
sys.exit()
1422
1961
if not noclose:
1424
1963
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1425
1964
if not stat.S_ISCHR(os.fstat(null).st_mode):
1426
1965
raise OSError(errno.ENODEV,
1427
u"%s not a character device"
1966
"%s not a character device"
1428
1967
% os.path.devnull)
1429
1968
os.dup2(null, sys.stdin.fileno())
1430
1969
os.dup2(null, sys.stdout.fileno())
1438
1977
##################################################################
1439
1978
# Parsing of options, both command line and config file
1440
1979
1441
parser = optparse.OptionParser(version = "%%prog %s" % version)
1442
parser.add_option("-i", u"--interface", type=u"string",
1443
metavar="IF", help=u"Bind to interface IF")
1444
parser.add_option("-a", u"--address", type=u"string",
1445
help=u"Address to listen for requests on")
1446
parser.add_option("-p", u"--port", type=u"int",
1447
help=u"Port number to receive requests on")
1448
parser.add_option("--check", action=u"store_true",
1449
help=u"Run self-test")
1450
parser.add_option("--debug", action=u"store_true",
1451
help=u"Debug mode; run in foreground and log to"
1452
u" terminal")
1453
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1454
u" priority string (see GnuTLS documentation)")
1455
parser.add_option("--servicename", type=u"string",
1456
metavar=u"NAME", help=u"Zeroconf service name")
1457
parser.add_option("--configdir", type=u"string",
1458
default=u"/etc/mandos", metavar=u"DIR",
1459
help=u"Directory to search for configuration"
1460
u" files")
1461
parser.add_option("--no-dbus", action=u"store_false",
1462
dest=u"use_dbus", help=u"Do not provide D-Bus"
1463
u" system bus interface")
1464
parser.add_option("--no-ipv6", action=u"store_false",
1465
dest=u"use_ipv6", help=u"Do not use IPv6")
1466
options = parser.parse_args()[0]
1980
parser = argparse.ArgumentParser()
1981
parser.add_argument("-v", "--version", action="version",
1982
version = "%%(prog)s %s" % version,
1983
help="show version number and exit")
1984
parser.add_argument("-i", "--interface", metavar="IF",
1985
help="Bind to interface IF")
1986
parser.add_argument("-a", "--address",
1987
help="Address to listen for requests on")
1988
parser.add_argument("-p", "--port", type=int,
1989
help="Port number to receive requests on")
1990
parser.add_argument("--check", action="store_true",
1991
help="Run self-test")
1992
parser.add_argument("--debug", action="store_true",
1993
help="Debug mode; run in foreground and log"
1994
" to terminal")
1995
parser.add_argument("--debuglevel", metavar="LEVEL",
1996
help="Debug level for stdout output")
1997
parser.add_argument("--priority", help="GnuTLS"
1998
" priority string (see GnuTLS documentation)")
1999
parser.add_argument("--servicename",
2000
metavar="NAME", help="Zeroconf service name")
2001
parser.add_argument("--configdir",
2002
default="/etc/mandos", metavar="DIR",
2003
help="Directory to search for configuration"
2004
" files")
2005
parser.add_argument("--no-dbus", action="store_false",
2006
dest="use_dbus", help="Do not provide D-Bus"
2007
" system bus interface")
2008
parser.add_argument("--no-ipv6", action="store_false",
2009
dest="use_ipv6", help="Do not use IPv6")
2010
parser.add_argument("--no-restore", action="store_false",
2011
dest="restore", help="Do not restore stored"
2012
" state")
2013
parser.add_argument("--statedir", metavar="DIR",
2014
help="Directory to save/restore state in")
2015
2016
options = parser.parse_args()
1467
2017
1468
2018
if options.check:
1469
2019
import doctest
1471
2021
sys.exit()
1472
2022
1473
2023
# Default values for config file for server-global settings
1474
server_defaults = { u"interface": u"",
1475
u"address": u"",
1476
u"port": u"",
1477
u"debug": u"False",
1478
u"priority":
1479
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1480
u"servicename": u"Mandos",
1481
u"use_dbus": u"True",
1482
u"use_ipv6": u"True",
2024
server_defaults = { "interface": "",
2025
"address": "",
2026
"port": "",
2027
"debug": "False",
2028
"priority":
2029
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2030
"servicename": "Mandos",
2031
"use_dbus": "True",
2032
"use_ipv6": "True",
2033
"debuglevel": "",
2034
"restore": "True",
2035
"statedir": "/var/lib/mandos"
1483
2036
}
1484
2037
1485
2038
# Parse config file for server-global settings
1486
2039
server_config = configparser.SafeConfigParser(server_defaults)
1487
2040
del server_defaults
1488
2041
server_config.read(os.path.join(options.configdir,
1489
u"mandos.conf"))
2042
"mandos.conf"))
1490
2043
# Convert the SafeConfigParser object to a dict
1491
2044
server_settings = server_config.defaults()
1492
2045
# Use the appropriate methods on the non-string config options
1493
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1494
server_settings[option] = server_config.getboolean(u"DEFAULT",
2046
for option in ("debug", "use_dbus", "use_ipv6"):
2047
server_settings[option] = server_config.getboolean("DEFAULT",
1495
2048
option)
1496
2049
if server_settings["port"]:
1497
server_settings["port"] = server_config.getint(u"DEFAULT",
1498
u"port")
2050
server_settings["port"] = server_config.getint("DEFAULT",
2051
"port")
1499
2052
del server_config
1500
2053
1501
2054
# Override the settings from the config file with command line
1502
2055
# options, if set.
1503
for option in (u"interface", u"address", u"port", u"debug",
1504
u"priority", u"servicename", u"configdir",
1505
u"use_dbus", u"use_ipv6"):
2056
for option in ("interface", "address", "port", "debug",
2057
"priority", "servicename", "configdir",
2058
"use_dbus", "use_ipv6", "debuglevel", "restore",
2059
"statedir"):
1506
2060
value = getattr(options, option)
1507
2061
if value is not None:
1508
2062
server_settings[option] = value
1516
2070
##################################################################
1517
2071
1518
2072
# For convenience
1519
debug = server_settings[u"debug"]
1520
use_dbus = server_settings[u"use_dbus"]
1521
use_ipv6 = server_settings[u"use_ipv6"]
1522
1523
if not debug:
1524
syslogger.setLevel(logging.WARNING)
1525
console.setLevel(logging.WARNING)
1526
1527
if server_settings[u"servicename"] != u"Mandos":
2073
debug = server_settings["debug"]
2074
debuglevel = server_settings["debuglevel"]
2075
use_dbus = server_settings["use_dbus"]
2076
use_ipv6 = server_settings["use_ipv6"]
2077
stored_state_path = os.path.join(server_settings["statedir"],
2078
stored_state_file)
2079
2080
if debug:
2081
initlogger(logging.DEBUG)
2082
else:
2083
if not debuglevel:
2084
initlogger()
2085
else:
2086
level = getattr(logging, debuglevel.upper())
2087
initlogger(level)
2088
2089
if server_settings["servicename"] != "Mandos":
1528
2090
syslogger.setFormatter(logging.Formatter
1529
(u'Mandos (%s) [%%(process)d]:'
1530
u' %%(levelname)s: %%(message)s'
1531
% server_settings[u"servicename"]))
2091
('Mandos (%s) [%%(process)d]:'
2092
' %%(levelname)s: %%(message)s'
2093
% server_settings["servicename"]))
1532
2094
1533
2095
# Parse config file with clients
1534
client_defaults = { u"timeout": u"1h",
1535
u"interval": u"5m",
1536
u"checker": u"fping -q -- %%(host)s",
1537
u"host": u"",
1538
}
1539
client_config = configparser.SafeConfigParser(client_defaults)
1540
client_config.read(os.path.join(server_settings[u"configdir"],
1541
u"clients.conf"))
2096
client_config = configparser.SafeConfigParser(Client.client_defaults)
2097
client_config.read(os.path.join(server_settings["configdir"],
2098
"clients.conf"))
1542
2099
1543
2100
global mandos_dbus_service
1544
2101
mandos_dbus_service = None
1545
2102
1546
tcp_server = MandosServer((server_settings[u"address"],
1547
server_settings[u"port"]),
2103
tcp_server = MandosServer((server_settings["address"],
2104
server_settings["port"]),
1548
2105
ClientHandler,
1549
interface=server_settings[u"interface"],
2106
interface=(server_settings["interface"]
2107
or None),
1550
2108
use_ipv6=use_ipv6,
1551
2109
gnutls_priority=
1552
server_settings[u"priority"],
2110
server_settings["priority"],
1553
2111
use_dbus=use_dbus)
1554
pidfilename = u"/var/run/mandos.pid"
1555
try:
1556
pidfile = open(pidfilename, u"w")
1557
except IOError:
1558
logger.error(u"Could not open file %r", pidfilename)
2112
if not debug:
2113
pidfilename = "/var/run/mandos.pid"
2114
try:
2115
pidfile = open(pidfilename, "w")
2116
except IOError:
2117
logger.error("Could not open file %r", pidfilename)
1559
2118
1560
2119
try:
1561
uid = pwd.getpwnam(u"_mandos").pw_uid
1562
gid = pwd.getpwnam(u"_mandos").pw_gid
2120
uid = pwd.getpwnam("_mandos").pw_uid
2121
gid = pwd.getpwnam("_mandos").pw_gid
1563
2122
except KeyError:
1564
2123
try:
1565
uid = pwd.getpwnam(u"mandos").pw_uid
1566
gid = pwd.getpwnam(u"mandos").pw_gid
2124
uid = pwd.getpwnam("mandos").pw_uid
2125
gid = pwd.getpwnam("mandos").pw_gid
1567
2126
except KeyError:
1568
2127
try:
1569
uid = pwd.getpwnam(u"nobody").pw_uid
1570
gid = pwd.getpwnam(u"nobody").pw_gid
2128
uid = pwd.getpwnam("nobody").pw_uid
2129
gid = pwd.getpwnam("nobody").pw_gid
1571
2130
except KeyError:
1572
2131
uid = 65534
1573
2132
gid = 65534
1574
2133
try:
1575
2134
os.setgid(gid)
1576
2135
os.setuid(uid)
1577
except OSError, error:
2136
except OSError as error:
1578
2137
if error[0] != errno.EPERM:
1579
2138
raise error
1580
2139
1581
# Enable all possible GnuTLS debugging
1582
2140
if debug:
2141
# Enable all possible GnuTLS debugging
2142
1583
2143
# "Use a log level over 10 to enable all debugging options."
1584
2144
# - GnuTLS manual
1585
2145
gnutls.library.functions.gnutls_global_set_log_level(11)
1586
2146
1587
2147
@gnutls.library.types.gnutls_log_func
1588
2148
def debug_gnutls(level, string):
1589
logger.debug(u"GnuTLS: %s", string[:-1])
2149
logger.debug("GnuTLS: %s", string[:-1])
1590
2150
1591
2151
(gnutls.library.functions
1592
2152
.gnutls_global_set_log_function(debug_gnutls))
2153
2154
# Redirect stdin so all checkers get /dev/null
2155
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2156
os.dup2(null, sys.stdin.fileno())
2157
if null > 2:
2158
os.close(null)
2159
else:
2160
# No console logging
2161
logger.removeHandler(console)
2162
2163
# Need to fork before connecting to D-Bus
2164
if not debug:
2165
# Close all input and output, do double fork, etc.
2166
daemon()
1593
2167
1594
2168
global main_loop
1595
2169
# From the Avahi example code
1599
2173
# End of Avahi example code
1600
2174
if use_dbus:
1601
2175
try:
1602
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
2176
bus_name = dbus.service.BusName("se.recompile.Mandos",
1603
2177
bus, do_not_queue=True)
1604
except dbus.exceptions.NameExistsException, e:
1605
logger.error(unicode(e) + u", disabling D-Bus")
2178
old_bus_name = (dbus.service.BusName
2179
("se.bsnet.fukt.Mandos", bus,
2180
do_not_queue=True))
2181
except dbus.exceptions.NameExistsException as e:
2182
logger.error(unicode(e) + ", disabling D-Bus")
1606
2183
use_dbus = False
1607
server_settings[u"use_dbus"] = False
2184
server_settings["use_dbus"] = False
1608
2185
tcp_server.use_dbus = False
1609
2186
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1610
service = AvahiService(name = server_settings[u"servicename"],
1611
servicetype = u"_mandos._tcp",
1612
protocol = protocol, bus = bus)
2187
service = AvahiServiceToSyslog(name =
2188
server_settings["servicename"],
2189
servicetype = "_mandos._tcp",
2190
protocol = protocol, bus = bus)
1613
2191
if server_settings["interface"]:
1614
2192
service.interface = (if_nametoindex
1615
(str(server_settings[u"interface"])))
2193
(str(server_settings["interface"])))
2194
2195
global multiprocessing_manager
2196
multiprocessing_manager = multiprocessing.Manager()
1616
2197
1617
2198
client_class = Client
1618
2199
if use_dbus:
1619
client_class = functools.partial(ClientDBus, bus = bus)
1620
tcp_server.clients.update(set(
1621
client_class(name = section,
1622
config= dict(client_config.items(section)))
1623
for section in client_config.sections()))
2200
client_class = functools.partial(ClientDBusTransitional,
2201
bus = bus)
2202
2203
client_settings = Client.config_parser(client_config)
2204
old_client_settings = {}
2205
clients_data = {}
2206
2207
# Get client data and settings from last running state.
2208
if server_settings["restore"]:
2209
try:
2210
with open(stored_state_path, "rb") as stored_state:
2211
clients_data, old_client_settings = (pickle.load
2212
(stored_state))
2213
os.remove(stored_state_path)
2214
except IOError as e:
2215
logger.warning("Could not load persistent state: {0}"
2216
.format(e))
2217
if e.errno != errno.ENOENT:
2218
raise
2219
2220
with PGPEngine() as pgp:
2221
for client_name, client in clients_data.iteritems():
2222
# Decide which value to use after restoring saved state.
2223
# We have three different values: Old config file,
2224
# new config file, and saved state.
2225
# New config value takes precedence if it differs from old
2226
# config value, otherwise use saved state.
2227
for name, value in client_settings[client_name].items():
2228
try:
2229
# For each value in new config, check if it
2230
# differs from the old config value (Except for
2231
# the "secret" attribute)
2232
if (name != "secret" and
2233
value != old_client_settings[client_name]
2234
[name]):
2235
client[name] = value
2236
except KeyError:
2237
pass
2238
2239
# Clients who has passed its expire date can still be
2240
# enabled if its last checker was successful. Clients
2241
# whose checker failed before we stored its state is
2242
# assumed to have failed all checkers during downtime.
2243
if client["enabled"]:
2244
if datetime.datetime.utcnow() >= client["expires"]:
2245
if not client["last_checked_ok"]:
2246
logger.warning(
2247
"disabling client {0} - Client never "
2248
"performed a successfull checker"
2249
.format(client["name"]))
2250
client["enabled"] = False
2251
elif client["last_checker_status"] != 0:
2252
logger.warning(
2253
"disabling client {0} - Client "
2254
"last checker failed with error code {1}"
2255
.format(client["name"],
2256
client["last_checker_status"]))
2257
client["enabled"] = False
2258
else:
2259
client["expires"] = (datetime.datetime
2260
.utcnow()
2261
+ client["timeout"])
2262
2263
try:
2264
client["secret"] = (
2265
pgp.decrypt(client["encrypted_secret"],
2266
client_settings[client_name]
2267
["secret"]))
2268
except PGPError:
2269
# If decryption fails, we use secret from new settings
2270
logger.debug("Failed to decrypt {0} old secret"
2271
.format(client_name))
2272
client["secret"] = (
2273
client_settings[client_name]["secret"])
2274
2275
2276
# Add/remove clients based on new changes made to config
2277
for client_name in set(old_client_settings) - set(client_settings):
2278
del clients_data[client_name]
2279
for client_name in set(client_settings) - set(old_client_settings):
2280
clients_data[client_name] = client_settings[client_name]
2281
2282
# Create clients all clients
2283
for client_name, client in clients_data.iteritems():
2284
tcp_server.clients[client_name] = client_class(
2285
name = client_name, settings = client)
2286
1624
2287
if not tcp_server.clients:
1625
logger.warning(u"No clients defined")
1626
1627
if debug:
1628
# Redirect stdin so all checkers get /dev/null
1629
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1630
os.dup2(null, sys.stdin.fileno())
1631
if null > 2:
1632
os.close(null)
1633
else:
1634
# No console logging
1635
logger.removeHandler(console)
1636
# Close all input and output, do double fork, etc.
1637
daemon()
1638
1639
try:
1640
with pidfile:
1641
pid = os.getpid()
1642
pidfile.write(str(pid) + "\n")
1643
del pidfile
1644
except IOError:
1645
logger.error(u"Could not write to file %r with PID %d",
1646
pidfilename, pid)
1647
except NameError:
1648
# "pidfile" was never created
1649
pass
1650
del pidfilename
1651
2288
logger.warning("No clients defined")
2289
1652
2290
if not debug:
2291
try:
2292
with pidfile:
2293
pid = os.getpid()
2294
pidfile.write(str(pid) + "\n".encode("utf-8"))
2295
del pidfile
2296
except IOError:
2297
logger.error("Could not write to file %r with PID %d",
2298
pidfilename, pid)
2299
except NameError:
2300
# "pidfile" was never created
2301
pass
2302
del pidfilename
1653
2303
signal.signal(signal.SIGINT, signal.SIG_IGN)
2304
1654
2305
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1655
2306
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1656
2307
1658
2309
class MandosDBusService(dbus.service.Object):
1659
2310
"""A D-Bus proxy object"""
1660
2311
def __init__(self):
1661
dbus.service.Object.__init__(self, bus, u"/")
1662
_interface = u"se.bsnet.fukt.Mandos"
2312
dbus.service.Object.__init__(self, bus, "/")
2313
_interface = "se.recompile.Mandos"
1663
2314
1664
@dbus.service.signal(_interface, signature=u"o")
2315
@dbus.service.signal(_interface, signature="o")
1665
2316
def ClientAdded(self, objpath):
1666
2317
"D-Bus signal"
1667
2318
pass
1668
2319
1669
@dbus.service.signal(_interface, signature=u"ss")
2320
@dbus.service.signal(_interface, signature="ss")
1670
2321
def ClientNotFound(self, fingerprint, address):
1671
2322
"D-Bus signal"
1672
2323
pass
1673
2324
1674
@dbus.service.signal(_interface, signature=u"os")
2325
@dbus.service.signal(_interface, signature="os")
1675
2326
def ClientRemoved(self, objpath, name):
1676
2327
"D-Bus signal"
1677
2328
pass
1678
2329
1679
@dbus.service.method(_interface, out_signature=u"ao")
2330
@dbus.service.method(_interface, out_signature="ao")
1680
2331
def GetAllClients(self):
1681
2332
"D-Bus method"
1682
2333
return dbus.Array(c.dbus_object_path
1683
for c in tcp_server.clients)
2334
for c in
2335
tcp_server.clients.itervalues())
1684
2336
1685
2337
@dbus.service.method(_interface,
1686
out_signature=u"a{oa{sv}}")
2338
out_signature="a{oa{sv}}")
1687
2339
def GetAllClientsWithProperties(self):
1688
2340
"D-Bus method"
1689
2341
return dbus.Dictionary(
1690
((c.dbus_object_path, c.GetAll(u""))
1691
for c in tcp_server.clients),
1692
signature=u"oa{sv}")
2342
((c.dbus_object_path, c.GetAll(""))
2343
for c in tcp_server.clients.itervalues()),
2344
signature="oa{sv}")
1693
2345
1694
@dbus.service.method(_interface, in_signature=u"o")
2346
@dbus.service.method(_interface, in_signature="o")
1695
2347
def RemoveClient(self, object_path):
1696
2348
"D-Bus method"
1697
for c in tcp_server.clients:
2349
for c in tcp_server.clients.itervalues():
1698
2350
if c.dbus_object_path == object_path:
1699
tcp_server.clients.remove(c)
2351
del tcp_server.clients[c.name]
1700
2352
c.remove_from_connection()
1701
2353
# Don't signal anything except ClientRemoved
1702
2354
c.disable(quiet=True)
1707
2359
1708
2360
del _interface
1709
2361
1710
mandos_dbus_service = MandosDBusService()
2362
class MandosDBusServiceTransitional(MandosDBusService):
2363
__metaclass__ = AlternateDBusNamesMetaclass
2364
mandos_dbus_service = MandosDBusServiceTransitional()
1711
2365
1712
2366
def cleanup():
1713
2367
"Cleanup function; run on exit"
1714
2368
service.cleanup()
1715
2369
2370
multiprocessing.active_children()
2371
if not (tcp_server.clients or client_settings):
2372
return
2373
2374
# Store client before exiting. Secrets are encrypted with key
2375
# based on what config file has. If config file is
2376
# removed/edited, old secret will thus be unrecovable.
2377
clients = {}
2378
with PGPEngine() as pgp:
2379
for client in tcp_server.clients.itervalues():
2380
key = client_settings[client.name]["secret"]
2381
client.encrypted_secret = pgp.encrypt(client.secret,
2382
key)
2383
client_dict = {}
2384
2385
# A list of attributes that can not be pickled
2386
# + secret.
2387
exclude = set(("bus", "changedstate", "secret",
2388
"checker"))
2389
for name, typ in (inspect.getmembers
2390
(dbus.service.Object)):
2391
exclude.add(name)
2392
2393
client_dict["encrypted_secret"] = (client
2394
.encrypted_secret)
2395
for attr in client.client_structure:
2396
if attr not in exclude:
2397
client_dict[attr] = getattr(client, attr)
2398
2399
clients[client.name] = client_dict
2400
del client_settings[client.name]["secret"]
2401
2402
try:
2403
with os.fdopen(os.open(stored_state_path,
2404
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2405
0600), "wb") as stored_state:
2406
pickle.dump((clients, client_settings), stored_state)
2407
except (IOError, OSError) as e:
2408
logger.warning("Could not save persistent state: {0}"
2409
.format(e))
2410
if e.errno not in (errno.ENOENT, errno.EACCES):
2411
raise
2412
2413
# Delete all clients, and settings from config
1716
2414
while tcp_server.clients:
1717
client = tcp_server.clients.pop()
2415
name, client = tcp_server.clients.popitem()
1718
2416
if use_dbus:
1719
2417
client.remove_from_connection()
1720
client.disable_hook = None
1721
2418
# Don't signal anything except ClientRemoved
1722
2419
client.disable(quiet=True)
1723
2420
if use_dbus:
1724
2421
# Emit D-Bus signal
1725
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2422
mandos_dbus_service.ClientRemoved(client
2423
.dbus_object_path,
1726
2424
client.name)
2425
client_settings.clear()
1727
2426
1728
2427
atexit.register(cleanup)
1729
2428
1730
for client in tcp_server.clients:
2429
for client in tcp_server.clients.itervalues():
1731
2430
if use_dbus:
1732
2431
# Emit D-Bus signal
1733
2432
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1734
client.enable()
2433
# Need to initiate checking of clients
2434
if client.enabled:
2435
client.init_checker()
1735
2436
1736
2437
tcp_server.enable()
1737
2438
tcp_server.server_activate()
1739
2440
# Find out what port we got
1740
2441
service.port = tcp_server.socket.getsockname()[1]
1741
2442
if use_ipv6:
1742
logger.info(u"Now listening on address %r, port %d,"
2443
logger.info("Now listening on address %r, port %d,"
1743
2444
" flowinfo %d, scope_id %d"
1744
2445
% tcp_server.socket.getsockname())
1745
2446
else: # IPv4
1746
logger.info(u"Now listening on address %r, port %d"
2447
logger.info("Now listening on address %r, port %d"
1747
2448
% tcp_server.socket.getsockname())
1748
2449
1749
2450
#service.interface = tcp_server.socket.getsockname()[3]
1752
2453
# From the Avahi example code
1753
2454
try:
1754
2455
service.activate()
1755
except dbus.exceptions.DBusException, error:
1756
logger.critical(u"DBusException: %s", error)
2456
except dbus.exceptions.DBusException as error:
2457
logger.critical("DBusException: %s", error)
1757
2458
cleanup()
1758
2459
sys.exit(1)
1759
2460
# End of Avahi example code
1763
2464
(tcp_server.handle_request
1764
2465
(*args[2:], **kwargs) or True))
1765
2466
1766
logger.debug(u"Starting main loop")
2467
logger.debug("Starting main loop")
1767
2468
main_loop.run()
1768
except AvahiError, error:
1769
logger.critical(u"AvahiError: %s", error)
2469
except AvahiError as error:
2470
logger.critical("AvahiError: %s", error)
1770
2471
cleanup()
1771
2472
sys.exit(1)
1772
2473
except KeyboardInterrupt:
1773
2474
if debug:
1774
print >> sys.stderr
1775
logger.debug(u"Server received KeyboardInterrupt")
1776
logger.debug(u"Server exiting")
2475
print("", file=sys.stderr)
2476
logger.debug("Server received KeyboardInterrupt")
2477
logger.debug("Server exiting")
1777
2478
# Must run before the D-Bus bus name gets deregistered
1778
2479
cleanup()
1779
2480
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0