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- Committer: Teddy Hogeborn
- Date: 2012-01-08 10:19:33 UTC
- Revision ID: teddy@recompile.se-20120108101933-xbtodqgepxax8hn1
Tags: version-1.5.2-1
* Makefile (version): Changed to "1.5.2".
* NEWS (Version 1.5.2): New entry.
* debian/changelog (1.5.2-1): - '' -
* NEWS (Version 1.5.2): New entry.
* debian/changelog (1.5.2-1): - '' -
- 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 © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
16
16
#
17
17
# 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
55
56
import logging
56
57
import logging.handlers
57
58
import pwd
58
from contextlib import closing
59
import contextlib
59
60
import struct
60
61
import fcntl
61
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
67
import tempfile
62
68
63
69
import dbus
64
70
import dbus.service
69
75
import ctypes.util
70
76
import xml.dom.minidom
71
77
import inspect
78
import GnuPGInterface
72
79
73
80
try:
74
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
85
except ImportError:
79
86
SO_BINDTODEVICE = None
80
87
81
82
version = "1.0.14"
83
84
logger = logging.Logger(u'mandos')
88
version = "1.5.2"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
85
92
syslogger = (logging.handlers.SysLogHandler
86
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
87
address = "/dev/log"))
88
syslogger.setFormatter(logging.Formatter
89
(u'Mandos [%(process)d]: %(levelname)s:'
90
u' %(message)s'))
91
logger.addHandler(syslogger)
92
93
console = logging.StreamHandler()
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
u' %(levelname)s:'
96
u' %(message)s'))
97
logger.addHandler(console)
94
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(debug, 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
if debug:
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
124
' [%(process)d]:'
125
' %(levelname)s:'
126
' %(message)s'))
127
logger.addHandler(console)
128
logger.setLevel(level)
129
130
131
class PGPError(Exception):
132
"""Exception if encryption/decryption fails"""
133
pass
134
135
136
class PGPEngine(object):
137
"""A simple class for OpenPGP symmetric encryption & decryption"""
138
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
147
148
def __enter__(self):
149
return self
150
151
def __exit__ (self, exc_type, exc_value, traceback):
152
self._cleanup()
153
return False
154
155
def __del__(self):
156
self._cleanup()
157
158
def _cleanup(self):
159
if self.tempdir is not None:
160
# Delete contents of tempdir
161
for root, dirs, files in os.walk(self.tempdir,
162
topdown = False):
163
for filename in files:
164
os.remove(os.path.join(root, filename))
165
for dirname in dirs:
166
os.rmdir(os.path.join(root, dirname))
167
# Remove tempdir
168
os.rmdir(self.tempdir)
169
self.tempdir = None
170
171
def password_encode(self, password):
172
# Passphrase can not be empty and can not contain newlines or
173
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
175
176
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
191
return ciphertext
192
193
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
208
return decrypted_plaintext
209
210
98
211
99
212
class AvahiError(Exception):
100
213
def __init__(self, value, *args, **kwargs):
116
229
Attributes:
117
230
interface: integer; avahi.IF_UNSPEC or an interface index.
118
231
Used to optionally bind to the specified interface.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
232
name: string; Example: 'Mandos'
233
type: string; Example: '_mandos._tcp'.
121
234
See <http://www.dns-sd.org/ServiceTypes.html>
122
235
port: integer; what port to announce
123
236
TXT: list of strings; TXT record for the service
132
245
"""
133
246
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
134
247
servicetype = None, port = None, TXT = None,
135
domain = u"", host = u"", max_renames = 32768,
248
domain = "", host = "", max_renames = 32768,
136
249
protocol = avahi.PROTO_UNSPEC, bus = None):
137
250
self.interface = interface
138
251
self.name = name
147
260
self.group = None # our entry group
148
261
self.server = None
149
262
self.bus = bus
263
self.entry_group_state_changed_match = None
150
264
def rename(self):
151
265
"""Derived from the Avahi example code"""
152
266
if self.rename_count >= self.max_renames:
153
logger.critical(u"No suitable Zeroconf service name found"
154
u" after %i retries, exiting.",
267
logger.critical("No suitable Zeroconf service name found"
268
" after %i retries, exiting.",
155
269
self.rename_count)
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
158
logger.info(u"Changing Zeroconf service name to %r ...",
159
unicode(self.name))
160
syslogger.setFormatter(logging.Formatter
161
(u'Mandos (%s) [%%(process)d]:'
162
u' %%(levelname)s: %%(message)s'
163
% self.name))
270
raise AvahiServiceError("Too many renames")
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
273
logger.info("Changing Zeroconf service name to %r ...",
274
self.name)
164
275
self.remove()
165
self.add()
276
try:
277
self.add()
278
except dbus.exceptions.DBusException as error:
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
166
282
self.rename_count += 1
167
283
def remove(self):
168
284
"""Derived from the Avahi example code"""
285
if self.entry_group_state_changed_match is not None:
286
self.entry_group_state_changed_match.remove()
287
self.entry_group_state_changed_match = None
169
288
if self.group is not None:
170
289
self.group.Reset()
171
290
def add(self):
172
291
"""Derived from the Avahi example code"""
292
self.remove()
173
293
if self.group is None:
174
294
self.group = dbus.Interface(
175
295
self.bus.get_object(avahi.DBUS_NAME,
176
296
self.server.EntryGroupNew()),
177
297
avahi.DBUS_INTERFACE_ENTRY_GROUP)
178
self.group.connect_to_signal('StateChanged',
179
self
180
.entry_group_state_changed)
181
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
298
self.entry_group_state_changed_match = (
299
self.group.connect_to_signal(
300
'StateChanged', self.entry_group_state_changed))
301
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
182
302
self.name, self.type)
183
303
self.group.AddService(
184
304
self.interface,
191
311
self.group.Commit()
192
312
def entry_group_state_changed(self, state, error):
193
313
"""Derived from the Avahi example code"""
194
logger.debug(u"Avahi state change: %i", state)
314
logger.debug("Avahi entry group state change: %i", state)
195
315
196
316
if state == avahi.ENTRY_GROUP_ESTABLISHED:
197
logger.debug(u"Zeroconf service established.")
317
logger.debug("Zeroconf service established.")
198
318
elif state == avahi.ENTRY_GROUP_COLLISION:
199
logger.warning(u"Zeroconf service name collision.")
319
logger.info("Zeroconf service name collision.")
200
320
self.rename()
201
321
elif state == avahi.ENTRY_GROUP_FAILURE:
202
logger.critical(u"Avahi: Error in group state changed %s",
322
logger.critical("Avahi: Error in group state changed %s",
203
323
unicode(error))
204
raise AvahiGroupError(u"State changed: %s"
324
raise AvahiGroupError("State changed: %s"
205
325
% unicode(error))
206
326
def cleanup(self):
207
327
"""Derived from the Avahi example code"""
208
328
if self.group is not None:
209
self.group.Free()
329
try:
330
self.group.Free()
331
except (dbus.exceptions.UnknownMethodException,
332
dbus.exceptions.DBusException):
333
pass
210
334
self.group = None
211
def server_state_changed(self, state):
335
self.remove()
336
def server_state_changed(self, state, error=None):
212
337
"""Derived from the Avahi example code"""
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
215
self.remove()
338
logger.debug("Avahi server state change: %i", state)
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"Zeroconf server failure" }
346
if state in bad_states:
347
if bad_states[state] is not None:
348
if error is None:
349
logger.error(bad_states[state])
350
else:
351
logger.error(bad_states[state] + ": %r", error)
352
self.cleanup()
216
353
elif state == avahi.SERVER_RUNNING:
217
354
self.add()
355
else:
356
if error is None:
357
logger.debug("Unknown state: %r", state)
358
else:
359
logger.debug("Unknown state: %r: %r", state, error)
218
360
def activate(self):
219
361
"""Derived from the Avahi example code"""
220
362
if self.server is None:
221
363
self.server = dbus.Interface(
222
364
self.bus.get_object(avahi.DBUS_NAME,
223
avahi.DBUS_PATH_SERVER),
365
avahi.DBUS_PATH_SERVER,
366
follow_name_owner_changes=True),
224
367
avahi.DBUS_INTERFACE_SERVER)
225
self.server.connect_to_signal(u"StateChanged",
368
self.server.connect_to_signal("StateChanged",
226
369
self.server_state_changed)
227
370
self.server_state_changed(self.server.GetState())
228
371
372
class AvahiServiceToSyslog(AvahiService):
373
def rename(self):
374
"""Add the new name to the syslog messages"""
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
380
return ret
229
381
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
387
230
388
class Client(object):
231
389
"""A representation of a client host served by this server.
232
390
233
391
Attributes:
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
236
fingerprint: string (40 or 32 hexadecimal digits); used to
237
uniquely identify the client
238
secret: bytestring; sent verbatim (over TLS) to client
239
host: string; available for use by the checker command
240
created: datetime.datetime(); (UTC) object creation
241
last_enabled: datetime.datetime(); (UTC)
242
enabled: bool()
243
last_checked_ok: datetime.datetime(); (UTC) or None
244
timeout: datetime.timedelta(); How long from last_checked_ok
245
until this client is invalid
246
interval: datetime.timedelta(); How often to start a new checker
247
disable_hook: If set, called by disable() as disable_hook(self)
392
approved: bool(); 'None' if not yet approved/disapproved
393
approval_delay: datetime.timedelta(); Time to wait for approval
394
approval_duration: datetime.timedelta(); Duration of one approval
248
395
checker: subprocess.Popen(); a running checker process used
249
396
to see if the client lives.
250
397
'None' if no process is running.
251
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
253
checker_callback_tag: - '' -
254
checker_command: string; External command which is run to check if
255
client lives. %() expansions are done at
398
checker_callback_tag: a gobject event source tag, or None
399
checker_command: string; External command which is run to check
400
if client lives. %() expansions are done at
256
401
runtime with vars(self) as dict, so that for
257
402
instance %(name)s can be used in the command.
403
checker_initiator_tag: a gobject event source tag, or None
404
created: datetime.datetime(); (UTC) object creation
405
client_structure: Object describing what attributes a client has
406
and is used for storing the client at exit
258
407
current_checker_command: string; current running checker_command
408
disable_initiator_tag: a gobject event source tag, or None
409
enabled: bool()
410
fingerprint: string (40 or 32 hexadecimal digits); used to
411
uniquely identify the client
412
host: string; available for use by the checker command
413
interval: datetime.timedelta(); How often to start a new checker
414
last_approval_request: datetime.datetime(); (UTC) or None
415
last_checked_ok: datetime.datetime(); (UTC) or None
416
last_checker_status: integer between 0 and 255 reflecting exit
417
status of last checker. -1 reflects crashed
418
checker, or None.
419
last_enabled: datetime.datetime(); (UTC) or None
420
name: string; from the config file, used in log messages and
421
D-Bus identifiers
422
secret: bytestring; sent verbatim (over TLS) to client
423
timeout: datetime.timedelta(); How long from last_checked_ok
424
until this client is disabled
425
extended_timeout: extra long timeout when secret has been sent
426
runtime_expansions: Allowed attributes for runtime expansion.
427
expires: datetime.datetime(); time (UTC) when a client will be
428
disabled, or None
259
429
"""
260
430
261
@staticmethod
262
def _timedelta_to_milliseconds(td):
263
"Convert a datetime.timedelta() to milliseconds"
264
return ((td.days * 24 * 60 * 60 * 1000)
265
+ (td.seconds * 1000)
266
+ (td.microseconds // 1000))
431
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
434
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
267
445
268
446
def timeout_milliseconds(self):
269
447
"Return the 'timeout' attribute in milliseconds"
270
return self._timedelta_to_milliseconds(self.timeout)
448
return timedelta_to_milliseconds(self.timeout)
449
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
271
453
272
454
def interval_milliseconds(self):
273
455
"Return the 'interval' attribute in milliseconds"
274
return self._timedelta_to_milliseconds(self.interval)
456
return timedelta_to_milliseconds(self.interval)
275
457
276
def __init__(self, name = None, disable_hook=None, config=None):
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
460
461
@staticmethod
462
def config_parser(config):
463
"""Construct a new dict of client settings of this form:
464
{ client_name: {setting_name: value, ...}, ...}
465
with exceptions for any special settings as defined above.
466
NOTE: Must be a pure function. Must return the same result
467
value given the same arguments.
468
"""
469
settings = {}
470
for client_name in config.sections():
471
section = dict(config.items(client_name))
472
client = settings[client_name] = {}
473
474
client["host"] = section["host"]
475
# Reformat values from string types to Python types
476
client["approved_by_default"] = config.getboolean(
477
client_name, "approved_by_default")
478
client["enabled"] = config.getboolean(client_name,
479
"enabled")
480
481
client["fingerprint"] = (section["fingerprint"].upper()
482
.replace(" ", ""))
483
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
485
elif "secfile" in section:
486
with open(os.path.expanduser(os.path.expandvars
487
(section["secfile"])),
488
"rb") as secfile:
489
client["secret"] = secfile.read()
490
else:
491
raise TypeError("No secret or secfile for section %s"
492
% section)
493
client["timeout"] = string_to_delta(section["timeout"])
494
client["extended_timeout"] = string_to_delta(
495
section["extended_timeout"])
496
client["interval"] = string_to_delta(section["interval"])
497
client["approval_delay"] = string_to_delta(
498
section["approval_delay"])
499
client["approval_duration"] = string_to_delta(
500
section["approval_duration"])
501
client["checker_command"] = section["checker"]
502
client["last_approval_request"] = None
503
client["last_checked_ok"] = None
504
client["last_checker_status"] = None
505
506
return settings
507
508
509
def __init__(self, settings, name = None):
277
510
"""Note: the 'checker' key in 'config' sets the
278
511
'checker_command' attribute and *not* the 'checker'
279
512
attribute."""
280
513
self.name = name
281
if config is None:
282
config = {}
283
logger.debug(u"Creating client %r", self.name)
514
# adding all client settings
515
for setting, value in settings.iteritems():
516
setattr(self, setting, value)
517
518
if self.enabled:
519
if not hasattr(self, "last_enabled"):
520
self.last_enabled = datetime.datetime.utcnow()
521
if not hasattr(self, "expires"):
522
self.expires = (datetime.datetime.utcnow()
523
+ self.timeout)
524
else:
525
self.last_enabled = None
526
self.expires = None
527
528
logger.debug("Creating client %r", self.name)
284
529
# Uppercase and remove spaces from fingerprint for later
285
530
# comparison purposes with return value from the fingerprint()
286
531
# function
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
289
logger.debug(u" Fingerprint: %s", self.fingerprint)
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
294
(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
532
logger.debug(" Fingerprint: %s", self.fingerprint)
533
self.created = settings.get("created",
534
datetime.datetime.utcnow())
535
536
# attributes specific for this server instance
309
537
self.checker = None
310
538
self.checker_initiator_tag = None
311
539
self.disable_initiator_tag = None
312
540
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
314
541
self.current_checker_command = None
315
self.last_connect = None
542
self.approved = None
543
self.approvals_pending = 0
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
549
if not attr.startswith("_")]
550
self.client_structure.append("client_structure")
551
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
556
if not name.startswith("_"):
557
self.client_structure.append(name)
558
559
# Send notice to process children that client state has changed
560
def send_changedstate(self):
561
with self.changedstate:
562
self.changedstate.notify_all()
316
563
317
564
def enable(self):
318
565
"""Start this client's checker and timeout hooks"""
319
if getattr(self, u"enabled", False):
566
if getattr(self, "enabled", False):
320
567
# Already enabled
321
568
return
569
self.send_changedstate()
570
self.expires = datetime.datetime.utcnow() + self.timeout
571
self.enabled = True
322
572
self.last_enabled = datetime.datetime.utcnow()
573
self.init_checker()
574
575
def disable(self, quiet=True):
576
"""Disable this client."""
577
if not getattr(self, "enabled", False):
578
return False
579
if not quiet:
580
self.send_changedstate()
581
if not quiet:
582
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
584
gobject.source_remove(self.disable_initiator_tag)
585
self.disable_initiator_tag = None
586
self.expires = None
587
if getattr(self, "checker_initiator_tag", False):
588
gobject.source_remove(self.checker_initiator_tag)
589
self.checker_initiator_tag = None
590
self.stop_checker()
591
self.enabled = False
592
# Do not run this again if called by a gobject.timeout_add
593
return False
594
595
def __del__(self):
596
self.disable()
597
598
def init_checker(self):
323
599
# Schedule a new checker to be started an 'interval' from now,
324
600
# and every interval from then on.
325
601
self.checker_initiator_tag = (gobject.timeout_add
329
605
self.disable_initiator_tag = (gobject.timeout_add
330
606
(self.timeout_milliseconds(),
331
607
self.disable))
332
self.enabled = True
333
608
# Also start a new checker *right now*.
334
609
self.start_checker()
335
610
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
611
def checker_callback(self, pid, condition, command):
360
612
"""The checker has completed, so take appropriate actions."""
361
613
self.checker_callback_tag = None
362
614
self.checker = None
363
615
if os.WIFEXITED(condition):
364
exitstatus = os.WEXITSTATUS(condition)
365
if exitstatus == 0:
366
logger.info(u"Checker for %(name)s succeeded",
616
self.last_checker_status = os.WEXITSTATUS(condition)
617
if self.last_checker_status == 0:
618
logger.info("Checker for %(name)s succeeded",
367
619
vars(self))
368
620
self.checked_ok()
369
621
else:
370
logger.info(u"Checker for %(name)s failed",
622
logger.info("Checker for %(name)s failed",
371
623
vars(self))
372
624
else:
373
logger.warning(u"Checker for %(name)s crashed?",
625
self.last_checker_status = -1
626
logger.warning("Checker for %(name)s crashed?",
374
627
vars(self))
375
628
376
def checked_ok(self):
629
def checked_ok(self, timeout=None):
377
630
"""Bump up the timeout for this client.
378
631
379
632
This should only be called when the client has been seen,
380
633
alive and well.
381
634
"""
635
if timeout is None:
636
timeout = self.timeout
382
637
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))
638
if self.disable_initiator_tag is not None:
639
gobject.source_remove(self.disable_initiator_tag)
640
if getattr(self, "enabled", False):
641
self.disable_initiator_tag = (gobject.timeout_add
642
(timedelta_to_milliseconds
643
(timeout), self.disable))
644
self.expires = datetime.datetime.utcnow() + timeout
645
646
def need_approval(self):
647
self.last_approval_request = datetime.datetime.utcnow()
387
648
388
649
def start_checker(self):
389
650
"""Start a new checker subprocess if one is not running.
396
657
# client would inevitably timeout, since no checker would get
397
658
# a chance to run to completion. If we instead leave running
398
659
# checkers alone, the checker would have to take more time
399
# than 'timeout' for the client to be declared invalid, which
400
# is as it should be.
660
# than 'timeout' for the client to be disabled, which is as it
661
# should be.
401
662
402
663
# If a checker exists, make sure it is not a zombie
403
664
try:
404
665
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
405
except (AttributeError, OSError), error:
666
except (AttributeError, OSError) as error:
406
667
if (isinstance(error, OSError)
407
668
and error.errno != errno.ECHILD):
408
669
raise error
409
670
else:
410
671
if pid:
411
logger.warning(u"Checker was a zombie")
672
logger.warning("Checker was a zombie")
412
673
gobject.source_remove(self.checker_callback_tag)
413
674
self.checker_callback(pid, status,
414
675
self.current_checker_command)
419
680
command = self.checker_command % self.host
420
681
except TypeError:
421
682
# 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())
683
escaped_attrs = dict(
684
(attr,
685
re.escape(unicode(str(getattr(self, attr, "")),
686
errors=
687
'replace')))
688
for attr in
689
self.runtime_expansions)
690
428
691
try:
429
692
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)
693
except TypeError as error:
694
logger.error('Could not format string "%s":'
695
' %s', self.checker_command, error)
433
696
return True # Try again later
434
697
self.current_checker_command = command
435
698
try:
436
logger.info(u"Starting checker %r for %s",
699
logger.info("Starting checker %r for %s",
437
700
command, self.name)
438
701
# We don't need to redirect stdout and stderr, since
439
702
# in normal mode, that is already done by daemon(),
441
704
# always replaced by /dev/null.)
442
705
self.checker = subprocess.Popen(command,
443
706
close_fds=True,
444
shell=True, cwd=u"/")
707
shell=True, cwd="/")
445
708
self.checker_callback_tag = (gobject.child_watch_add
446
709
(self.checker.pid,
447
710
self.checker_callback,
452
715
if pid:
453
716
gobject.source_remove(self.checker_callback_tag)
454
717
self.checker_callback(pid, status, command)
455
except OSError, error:
456
logger.error(u"Failed to start subprocess: %s",
718
except OSError as error:
719
logger.error("Failed to start subprocess: %s",
457
720
error)
458
721
# Re-run this periodically if run by gobject.timeout_add
459
722
return True
463
726
if self.checker_callback_tag:
464
727
gobject.source_remove(self.checker_callback_tag)
465
728
self.checker_callback_tag = None
466
if getattr(self, u"checker", None) is None:
729
if getattr(self, "checker", None) is None:
467
730
return
468
logger.debug(u"Stopping checker for %(name)s", vars(self))
731
logger.debug("Stopping checker for %(name)s", vars(self))
469
732
try:
470
733
os.kill(self.checker.pid, signal.SIGTERM)
471
734
#time.sleep(0.5)
472
735
#if self.checker.poll() is None:
473
736
# os.kill(self.checker.pid, signal.SIGKILL)
474
except OSError, error:
737
except OSError as error:
475
738
if error.errno != errno.ESRCH: # No such process
476
739
raise
477
740
self.checker = None
478
479
def still_valid(self):
480
"""Has the timeout not yet passed for this client?"""
481
if not getattr(self, u"enabled", False):
482
return False
483
now = datetime.datetime.utcnow()
484
if self.last_checked_ok is None:
485
return now < (self.created + self.timeout)
486
else:
487
return now < (self.last_checked_ok + self.timeout)
488
489
490
def dbus_service_property(dbus_interface, signature=u"v",
491
access=u"readwrite", byte_arrays=False):
741
742
743
def dbus_service_property(dbus_interface, signature="v",
744
access="readwrite", byte_arrays=False):
492
745
"""Decorators for marking methods of a DBusObjectWithProperties to
493
746
become properties on the D-Bus.
494
747
499
752
dbus.service.method, except there is only "signature", since the
500
753
type from Get() and the type sent to Set() is the same.
501
754
"""
755
# Encoding deeply encoded byte arrays is not supported yet by the
756
# "Set" method, so we fail early here:
757
if byte_arrays and signature != "ay":
758
raise ValueError("Byte arrays not supported for non-'ay'"
759
" signature %r" % signature)
502
760
def decorator(func):
503
761
func._dbus_is_property = True
504
762
func._dbus_interface = dbus_interface
505
763
func._dbus_signature = signature
506
764
func._dbus_access = access
507
765
func._dbus_name = func.__name__
508
if func._dbus_name.endswith(u"_dbus_property"):
766
if func._dbus_name.endswith("_dbus_property"):
509
767
func._dbus_name = func._dbus_name[:-14]
510
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
768
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
511
769
return func
512
770
return decorator
513
771
533
791
534
792
class DBusObjectWithProperties(dbus.service.Object):
535
793
"""A D-Bus object with properties.
536
794
537
795
Classes inheriting from this can use the dbus_service_property
538
796
decorator to expose methods as D-Bus properties. It exposes the
539
797
standard Get(), Set(), and GetAll() methods on the D-Bus.
541
799
542
800
@staticmethod
543
801
def _is_dbus_property(obj):
544
return getattr(obj, u"_dbus_is_property", False)
802
return getattr(obj, "_dbus_is_property", False)
545
803
546
804
def _get_all_dbus_properties(self):
547
805
"""Returns a generator of (name, attribute) pairs
548
806
"""
549
return ((prop._dbus_name, prop)
807
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
808
for cls in self.__class__.__mro__
550
809
for name, prop in
551
inspect.getmembers(self, self._is_dbus_property))
810
inspect.getmembers(cls, self._is_dbus_property))
552
811
553
812
def _get_dbus_property(self, interface_name, property_name):
554
813
"""Returns a bound method if one exists which is a D-Bus
555
814
property with the specified name and interface.
556
815
"""
557
for name in (property_name,
558
property_name + u"_dbus_property"):
559
prop = getattr(self, name, None)
560
if (prop is None
561
or not self._is_dbus_property(prop)
562
or prop._dbus_name != property_name
563
or (interface_name and prop._dbus_interface
564
and interface_name != prop._dbus_interface)):
565
continue
566
return prop
816
for cls in self.__class__.__mro__:
817
for name, value in (inspect.getmembers
818
(cls, self._is_dbus_property)):
819
if (value._dbus_name == property_name
820
and value._dbus_interface == interface_name):
821
return value.__get__(self)
822
567
823
# No such property
568
raise DBusPropertyNotFound(self.dbus_object_path + u":"
569
+ interface_name + u"."
824
raise DBusPropertyNotFound(self.dbus_object_path + ":"
825
+ interface_name + "."
570
826
+ property_name)
571
827
572
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
573
out_signature=u"v")
828
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
829
out_signature="v")
574
830
def Get(self, interface_name, property_name):
575
831
"""Standard D-Bus property Get() method, see D-Bus standard.
576
832
"""
577
833
prop = self._get_dbus_property(interface_name, property_name)
578
if prop._dbus_access == u"write":
834
if prop._dbus_access == "write":
579
835
raise DBusPropertyAccessException(property_name)
580
836
value = prop()
581
if not hasattr(value, u"variant_level"):
837
if not hasattr(value, "variant_level"):
582
838
return value
583
839
return type(value)(value, variant_level=value.variant_level+1)
584
840
585
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
841
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
586
842
def Set(self, interface_name, property_name, value):
587
843
"""Standard D-Bus property Set() method, see D-Bus standard.
588
844
"""
589
845
prop = self._get_dbus_property(interface_name, property_name)
590
if prop._dbus_access == u"read":
846
if prop._dbus_access == "read":
591
847
raise DBusPropertyAccessException(property_name)
592
if prop._dbus_get_args_options[u"byte_arrays"]:
593
value = dbus.ByteArray(''.join(unichr(byte)
594
for byte in value))
848
if prop._dbus_get_args_options["byte_arrays"]:
849
# The byte_arrays option is not supported yet on
850
# signatures other than "ay".
851
if prop._dbus_signature != "ay":
852
raise ValueError
853
value = dbus.ByteArray(b''.join(chr(byte)
854
for byte in value))
595
855
prop(value)
596
856
597
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
598
out_signature=u"a{sv}")
857
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
858
out_signature="a{sv}")
599
859
def GetAll(self, interface_name):
600
860
"""Standard D-Bus property GetAll() method, see D-Bus
601
861
standard.
602
862
603
863
Note: Will not include properties with access="write".
604
864
"""
605
all = {}
865
properties = {}
606
866
for name, prop in self._get_all_dbus_properties():
607
867
if (interface_name
608
868
and interface_name != prop._dbus_interface):
609
869
# Interface non-empty but did not match
610
870
continue
611
871
# Ignore write-only properties
612
if prop._dbus_access == u"write":
872
if prop._dbus_access == "write":
613
873
continue
614
874
value = prop()
615
if not hasattr(value, u"variant_level"):
616
all[name] = value
875
if not hasattr(value, "variant_level"):
876
properties[name] = value
617
877
continue
618
all[name] = type(value)(value, variant_level=
619
value.variant_level+1)
620
return dbus.Dictionary(all, signature=u"sv")
878
properties[name] = type(value)(value, variant_level=
879
value.variant_level+1)
880
return dbus.Dictionary(properties, signature="sv")
621
881
622
882
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
623
out_signature=u"s",
883
out_signature="s",
624
884
path_keyword='object_path',
625
885
connection_keyword='connection')
626
886
def Introspect(self, object_path, connection):
631
891
try:
632
892
document = xml.dom.minidom.parseString(xmlstring)
633
893
def make_tag(document, name, prop):
634
e = document.createElement(u"property")
635
e.setAttribute(u"name", name)
636
e.setAttribute(u"type", prop._dbus_signature)
637
e.setAttribute(u"access", prop._dbus_access)
894
e = document.createElement("property")
895
e.setAttribute("name", name)
896
e.setAttribute("type", prop._dbus_signature)
897
e.setAttribute("access", prop._dbus_access)
638
898
return e
639
for if_tag in document.getElementsByTagName(u"interface"):
899
for if_tag in document.getElementsByTagName("interface"):
640
900
for tag in (make_tag(document, name, prop)
641
901
for name, prop
642
902
in self._get_all_dbus_properties()
643
903
if prop._dbus_interface
644
== if_tag.getAttribute(u"name")):
904
== if_tag.getAttribute("name")):
645
905
if_tag.appendChild(tag)
646
906
# Add the names to the return values for the
647
907
# "org.freedesktop.DBus.Properties" methods
648
if (if_tag.getAttribute(u"name")
649
== u"org.freedesktop.DBus.Properties"):
650
for cn in if_tag.getElementsByTagName(u"method"):
651
if cn.getAttribute(u"name") == u"Get":
652
for arg in cn.getElementsByTagName(u"arg"):
653
if (arg.getAttribute(u"direction")
654
== u"out"):
655
arg.setAttribute(u"name", u"value")
656
elif cn.getAttribute(u"name") == u"GetAll":
657
for arg in cn.getElementsByTagName(u"arg"):
658
if (arg.getAttribute(u"direction")
659
== u"out"):
660
arg.setAttribute(u"name", u"props")
661
xmlstring = document.toxml(u"utf-8")
908
if (if_tag.getAttribute("name")
909
== "org.freedesktop.DBus.Properties"):
910
for cn in if_tag.getElementsByTagName("method"):
911
if cn.getAttribute("name") == "Get":
912
for arg in cn.getElementsByTagName("arg"):
913
if (arg.getAttribute("direction")
914
== "out"):
915
arg.setAttribute("name", "value")
916
elif cn.getAttribute("name") == "GetAll":
917
for arg in cn.getElementsByTagName("arg"):
918
if (arg.getAttribute("direction")
919
== "out"):
920
arg.setAttribute("name", "props")
921
xmlstring = document.toxml("utf-8")
662
922
document.unlink()
663
923
except (AttributeError, xml.dom.DOMException,
664
xml.parsers.expat.ExpatError), error:
665
logger.error(u"Failed to override Introspection method",
924
xml.parsers.expat.ExpatError) as error:
925
logger.error("Failed to override Introspection method",
666
926
error)
667
927
return xmlstring
668
928
669
929
930
def datetime_to_dbus (dt, variant_level=0):
931
"""Convert a UTC datetime.datetime() to a D-Bus type."""
932
if dt is None:
933
return dbus.String("", variant_level = variant_level)
934
return dbus.String(dt.isoformat(),
935
variant_level=variant_level)
936
937
938
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
939
.__metaclass__):
940
"""Applied to an empty subclass of a D-Bus object, this metaclass
941
will add additional D-Bus attributes matching a certain pattern.
942
"""
943
def __new__(mcs, name, bases, attr):
944
# Go through all the base classes which could have D-Bus
945
# methods, signals, or properties in them
946
for base in (b for b in bases
947
if issubclass(b, dbus.service.Object)):
948
# Go though all attributes of the base class
949
for attrname, attribute in inspect.getmembers(base):
950
# Ignore non-D-Bus attributes, and D-Bus attributes
951
# with the wrong interface name
952
if (not hasattr(attribute, "_dbus_interface")
953
or not attribute._dbus_interface
954
.startswith("se.recompile.Mandos")):
955
continue
956
# Create an alternate D-Bus interface name based on
957
# the current name
958
alt_interface = (attribute._dbus_interface
959
.replace("se.recompile.Mandos",
960
"se.bsnet.fukt.Mandos"))
961
# Is this a D-Bus signal?
962
if getattr(attribute, "_dbus_is_signal", False):
963
# Extract the original non-method function by
964
# black magic
965
nonmethod_func = (dict(
966
zip(attribute.func_code.co_freevars,
967
attribute.__closure__))["func"]
968
.cell_contents)
969
# Create a new, but exactly alike, function
970
# object, and decorate it to be a new D-Bus signal
971
# with the alternate D-Bus interface name
972
new_function = (dbus.service.signal
973
(alt_interface,
974
attribute._dbus_signature)
975
(types.FunctionType(
976
nonmethod_func.func_code,
977
nonmethod_func.func_globals,
978
nonmethod_func.func_name,
979
nonmethod_func.func_defaults,
980
nonmethod_func.func_closure)))
981
# Define a creator of a function to call both the
982
# old and new functions, so both the old and new
983
# signals gets sent when the function is called
984
def fixscope(func1, func2):
985
"""This function is a scope container to pass
986
func1 and func2 to the "call_both" function
987
outside of its arguments"""
988
def call_both(*args, **kwargs):
989
"""This function will emit two D-Bus
990
signals by calling func1 and func2"""
991
func1(*args, **kwargs)
992
func2(*args, **kwargs)
993
return call_both
994
# Create the "call_both" function and add it to
995
# the class
996
attr[attrname] = fixscope(attribute,
997
new_function)
998
# Is this a D-Bus method?
999
elif getattr(attribute, "_dbus_is_method", False):
1000
# Create a new, but exactly alike, function
1001
# object. Decorate it to be a new D-Bus method
1002
# with the alternate D-Bus interface name. Add it
1003
# to the class.
1004
attr[attrname] = (dbus.service.method
1005
(alt_interface,
1006
attribute._dbus_in_signature,
1007
attribute._dbus_out_signature)
1008
(types.FunctionType
1009
(attribute.func_code,
1010
attribute.func_globals,
1011
attribute.func_name,
1012
attribute.func_defaults,
1013
attribute.func_closure)))
1014
# Is this a D-Bus property?
1015
elif getattr(attribute, "_dbus_is_property", False):
1016
# Create a new, but exactly alike, function
1017
# object, and decorate it to be a new D-Bus
1018
# property with the alternate D-Bus interface
1019
# name. Add it to the class.
1020
attr[attrname] = (dbus_service_property
1021
(alt_interface,
1022
attribute._dbus_signature,
1023
attribute._dbus_access,
1024
attribute
1025
._dbus_get_args_options
1026
["byte_arrays"])
1027
(types.FunctionType
1028
(attribute.func_code,
1029
attribute.func_globals,
1030
attribute.func_name,
1031
attribute.func_defaults,
1032
attribute.func_closure)))
1033
return type.__new__(mcs, name, bases, attr)
1034
1035
670
1036
class ClientDBus(Client, DBusObjectWithProperties):
671
1037
"""A Client class using D-Bus
672
1038
674
1040
dbus_object_path: dbus.ObjectPath
675
1041
bus: dbus.SystemBus()
676
1042
"""
1043
1044
runtime_expansions = (Client.runtime_expansions
1045
+ ("dbus_object_path",))
1046
677
1047
# dbus.service.Object doesn't use super(), so we can't either.
678
1048
679
1049
def __init__(self, bus = None, *args, **kwargs):
681
1051
Client.__init__(self, *args, **kwargs)
682
1052
# Only now, when this client is initialized, can it show up on
683
1053
# the D-Bus
1054
client_object_name = unicode(self.name).translate(
1055
{ord("."): ord("_"),
1056
ord("-"): ord("_")})
684
1057
self.dbus_object_path = (dbus.ObjectPath
685
(u"/clients/"
686
+ self.name.replace(u".", u"_")))
1058
("/clients/" + client_object_name))
687
1059
DBusObjectWithProperties.__init__(self, self.bus,
688
1060
self.dbus_object_path)
689
690
@staticmethod
691
def _datetime_to_dbus(dt, variant_level=0):
692
"""Convert a UTC datetime.datetime() to a D-Bus type."""
693
return dbus.String(dt.isoformat(),
694
variant_level=variant_level)
695
696
def enable(self):
697
oldstate = getattr(self, u"enabled", False)
698
r = Client.enable(self)
699
if oldstate != self.enabled:
700
# Emit D-Bus signals
701
self.PropertyChanged(dbus.String(u"enabled"),
702
dbus.Boolean(True, variant_level=1))
703
self.PropertyChanged(
704
dbus.String(u"last_enabled"),
705
self._datetime_to_dbus(self.last_enabled,
706
variant_level=1))
707
return r
708
709
def disable(self, quiet = False):
710
oldstate = getattr(self, u"enabled", False)
711
r = Client.disable(self, quiet=quiet)
712
if not quiet and oldstate != self.enabled:
713
# Emit D-Bus signal
714
self.PropertyChanged(dbus.String(u"enabled"),
715
dbus.Boolean(False, variant_level=1))
716
return r
1061
1062
def notifychangeproperty(transform_func,
1063
dbus_name, type_func=lambda x: x,
1064
variant_level=1):
1065
""" Modify a variable so that it's a property which announces
1066
its changes to DBus.
1067
1068
transform_fun: Function that takes a value and a variant_level
1069
and transforms it to a D-Bus type.
1070
dbus_name: D-Bus name of the variable
1071
type_func: Function that transform the value before sending it
1072
to the D-Bus. Default: no transform
1073
variant_level: D-Bus variant level. Default: 1
1074
"""
1075
attrname = "_{0}".format(dbus_name)
1076
def setter(self, value):
1077
if hasattr(self, "dbus_object_path"):
1078
if (not hasattr(self, attrname) or
1079
type_func(getattr(self, attrname, None))
1080
!= type_func(value)):
1081
dbus_value = transform_func(type_func(value),
1082
variant_level
1083
=variant_level)
1084
self.PropertyChanged(dbus.String(dbus_name),
1085
dbus_value)
1086
setattr(self, attrname, value)
1087
1088
return property(lambda self: getattr(self, attrname), setter)
1089
1090
1091
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1092
approvals_pending = notifychangeproperty(dbus.Boolean,
1093
"ApprovalPending",
1094
type_func = bool)
1095
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1096
last_enabled = notifychangeproperty(datetime_to_dbus,
1097
"LastEnabled")
1098
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1099
type_func = lambda checker:
1100
checker is not None)
1101
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1102
"LastCheckedOK")
1103
last_approval_request = notifychangeproperty(
1104
datetime_to_dbus, "LastApprovalRequest")
1105
approved_by_default = notifychangeproperty(dbus.Boolean,
1106
"ApprovedByDefault")
1107
approval_delay = notifychangeproperty(dbus.UInt64,
1108
"ApprovalDelay",
1109
type_func =
1110
timedelta_to_milliseconds)
1111
approval_duration = notifychangeproperty(
1112
dbus.UInt64, "ApprovalDuration",
1113
type_func = timedelta_to_milliseconds)
1114
host = notifychangeproperty(dbus.String, "Host")
1115
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1116
type_func =
1117
timedelta_to_milliseconds)
1118
extended_timeout = notifychangeproperty(
1119
dbus.UInt64, "ExtendedTimeout",
1120
type_func = timedelta_to_milliseconds)
1121
interval = notifychangeproperty(dbus.UInt64,
1122
"Interval",
1123
type_func =
1124
timedelta_to_milliseconds)
1125
checker_command = notifychangeproperty(dbus.String, "Checker")
1126
1127
del notifychangeproperty
717
1128
718
1129
def __del__(self, *args, **kwargs):
719
1130
try:
720
1131
self.remove_from_connection()
721
1132
except LookupError:
722
1133
pass
723
if hasattr(DBusObjectWithProperties, u"__del__"):
1134
if hasattr(DBusObjectWithProperties, "__del__"):
724
1135
DBusObjectWithProperties.__del__(self, *args, **kwargs)
725
1136
Client.__del__(self, *args, **kwargs)
726
1137
728
1139
*args, **kwargs):
729
1140
self.checker_callback_tag = None
730
1141
self.checker = None
731
# Emit D-Bus signal
732
self.PropertyChanged(dbus.String(u"checker_running"),
733
dbus.Boolean(False, variant_level=1))
734
1142
if os.WIFEXITED(condition):
735
1143
exitstatus = os.WEXITSTATUS(condition)
736
1144
# Emit D-Bus signal
746
1154
return Client.checker_callback(self, pid, condition, command,
747
1155
*args, **kwargs)
748
1156
749
def checked_ok(self, *args, **kwargs):
750
r = Client.checked_ok(self, *args, **kwargs)
751
# Emit D-Bus signal
752
self.PropertyChanged(
753
dbus.String(u"last_checked_ok"),
754
(self._datetime_to_dbus(self.last_checked_ok,
755
variant_level=1)))
756
return r
757
758
1157
def start_checker(self, *args, **kwargs):
759
1158
old_checker = self.checker
760
1159
if self.checker is not None:
767
1166
and old_checker_pid != self.checker.pid):
768
1167
# Emit D-Bus signal
769
1168
self.CheckerStarted(self.current_checker_command)
770
self.PropertyChanged(
771
dbus.String(u"checker_running"),
772
dbus.Boolean(True, variant_level=1))
773
return r
774
775
def stop_checker(self, *args, **kwargs):
776
old_checker = getattr(self, u"checker", None)
777
r = Client.stop_checker(self, *args, **kwargs)
778
if (old_checker is not None
779
and getattr(self, u"checker", None) is None):
780
self.PropertyChanged(dbus.String(u"checker_running"),
781
dbus.Boolean(False, variant_level=1))
782
return r
783
784
## D-Bus methods & signals
785
_interface = u"se.bsnet.fukt.Mandos.Client"
786
787
# CheckedOK - method
788
@dbus.service.method(_interface)
789
def CheckedOK(self):
790
return self.checked_ok()
1169
return r
1170
1171
def _reset_approved(self):
1172
self.approved = None
1173
return False
1174
1175
def approve(self, value=True):
1176
self.send_changedstate()
1177
self.approved = value
1178
gobject.timeout_add(timedelta_to_milliseconds
1179
(self.approval_duration),
1180
self._reset_approved)
1181
1182
1183
## D-Bus methods, signals & properties
1184
_interface = "se.recompile.Mandos.Client"
1185
1186
## Signals
791
1187
792
1188
# CheckerCompleted - signal
793
@dbus.service.signal(_interface, signature=u"nxs")
1189
@dbus.service.signal(_interface, signature="nxs")
794
1190
def CheckerCompleted(self, exitcode, waitstatus, command):
795
1191
"D-Bus signal"
796
1192
pass
797
1193
798
1194
# CheckerStarted - signal
799
@dbus.service.signal(_interface, signature=u"s")
1195
@dbus.service.signal(_interface, signature="s")
800
1196
def CheckerStarted(self, command):
801
1197
"D-Bus signal"
802
1198
pass
803
1199
804
1200
# PropertyChanged - signal
805
@dbus.service.signal(_interface, signature=u"sv")
1201
@dbus.service.signal(_interface, signature="sv")
806
1202
def PropertyChanged(self, property, value):
807
1203
"D-Bus signal"
808
1204
pass
810
1206
# GotSecret - signal
811
1207
@dbus.service.signal(_interface)
812
1208
def GotSecret(self):
813
"D-Bus signal"
1209
"""D-Bus signal
1210
Is sent after a successful transfer of secret from the Mandos
1211
server to mandos-client
1212
"""
814
1213
pass
815
1214
816
1215
# Rejected - signal
817
@dbus.service.signal(_interface)
818
def Rejected(self):
1216
@dbus.service.signal(_interface, signature="s")
1217
def Rejected(self, reason):
819
1218
"D-Bus signal"
820
1219
pass
821
1220
1221
# NeedApproval - signal
1222
@dbus.service.signal(_interface, signature="tb")
1223
def NeedApproval(self, timeout, default):
1224
"D-Bus signal"
1225
return self.need_approval()
1226
1227
## Methods
1228
1229
# Approve - method
1230
@dbus.service.method(_interface, in_signature="b")
1231
def Approve(self, value):
1232
self.approve(value)
1233
1234
# CheckedOK - method
1235
@dbus.service.method(_interface)
1236
def CheckedOK(self):
1237
self.checked_ok()
1238
822
1239
# Enable - method
823
1240
@dbus.service.method(_interface)
824
1241
def Enable(self):
842
1259
def StopChecker(self):
843
1260
self.stop_checker()
844
1261
845
# name - property
846
@dbus_service_property(_interface, signature=u"s", access=u"read")
847
def name_dbus_property(self):
1262
## Properties
1263
1264
# ApprovalPending - property
1265
@dbus_service_property(_interface, signature="b", access="read")
1266
def ApprovalPending_dbus_property(self):
1267
return dbus.Boolean(bool(self.approvals_pending))
1268
1269
# ApprovedByDefault - property
1270
@dbus_service_property(_interface, signature="b",
1271
access="readwrite")
1272
def ApprovedByDefault_dbus_property(self, value=None):
1273
if value is None: # get
1274
return dbus.Boolean(self.approved_by_default)
1275
self.approved_by_default = bool(value)
1276
1277
# ApprovalDelay - property
1278
@dbus_service_property(_interface, signature="t",
1279
access="readwrite")
1280
def ApprovalDelay_dbus_property(self, value=None):
1281
if value is None: # get
1282
return dbus.UInt64(self.approval_delay_milliseconds())
1283
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1284
1285
# ApprovalDuration - property
1286
@dbus_service_property(_interface, signature="t",
1287
access="readwrite")
1288
def ApprovalDuration_dbus_property(self, value=None):
1289
if value is None: # get
1290
return dbus.UInt64(timedelta_to_milliseconds(
1291
self.approval_duration))
1292
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1293
1294
# Name - property
1295
@dbus_service_property(_interface, signature="s", access="read")
1296
def Name_dbus_property(self):
848
1297
return dbus.String(self.name)
849
1298
850
# fingerprint - property
851
@dbus_service_property(_interface, signature=u"s", access=u"read")
852
def fingerprint_dbus_property(self):
1299
# Fingerprint - property
1300
@dbus_service_property(_interface, signature="s", access="read")
1301
def Fingerprint_dbus_property(self):
853
1302
return dbus.String(self.fingerprint)
854
1303
855
# host - property
856
@dbus_service_property(_interface, signature=u"s",
857
access=u"readwrite")
858
def host_dbus_property(self, value=None):
1304
# Host - property
1305
@dbus_service_property(_interface, signature="s",
1306
access="readwrite")
1307
def Host_dbus_property(self, value=None):
859
1308
if value is None: # get
860
1309
return dbus.String(self.host)
861
self.host = value
862
# Emit D-Bus signal
863
self.PropertyChanged(dbus.String(u"host"),
864
dbus.String(value, variant_level=1))
865
866
# created - property
867
@dbus_service_property(_interface, signature=u"s", access=u"read")
868
def created_dbus_property(self):
869
return dbus.String(self._datetime_to_dbus(self.created))
870
871
# last_enabled - property
872
@dbus_service_property(_interface, signature=u"s", access=u"read")
873
def last_enabled_dbus_property(self):
874
if self.last_enabled is None:
875
return dbus.String(u"")
876
return dbus.String(self._datetime_to_dbus(self.last_enabled))
877
878
# enabled - property
879
@dbus_service_property(_interface, signature=u"b",
880
access=u"readwrite")
881
def enabled_dbus_property(self, value=None):
1310
self.host = unicode(value)
1311
1312
# Created - property
1313
@dbus_service_property(_interface, signature="s", access="read")
1314
def Created_dbus_property(self):
1315
return datetime_to_dbus(self.created)
1316
1317
# LastEnabled - property
1318
@dbus_service_property(_interface, signature="s", access="read")
1319
def LastEnabled_dbus_property(self):
1320
return datetime_to_dbus(self.last_enabled)
1321
1322
# Enabled - property
1323
@dbus_service_property(_interface, signature="b",
1324
access="readwrite")
1325
def Enabled_dbus_property(self, value=None):
882
1326
if value is None: # get
883
1327
return dbus.Boolean(self.enabled)
884
1328
if value:
886
1330
else:
887
1331
self.disable()
888
1332
889
# last_checked_ok - property
890
@dbus_service_property(_interface, signature=u"s",
891
access=u"readwrite")
892
def last_checked_ok_dbus_property(self, value=None):
1333
# LastCheckedOK - property
1334
@dbus_service_property(_interface, signature="s",
1335
access="readwrite")
1336
def LastCheckedOK_dbus_property(self, value=None):
893
1337
if value is not None:
894
1338
self.checked_ok()
895
1339
return
896
if self.last_checked_ok is None:
897
return dbus.String(u"")
898
return dbus.String(self._datetime_to_dbus(self
899
.last_checked_ok))
900
901
# timeout - property
902
@dbus_service_property(_interface, signature=u"t",
903
access=u"readwrite")
904
def timeout_dbus_property(self, value=None):
1340
return datetime_to_dbus(self.last_checked_ok)
1341
1342
# Expires - property
1343
@dbus_service_property(_interface, signature="s", access="read")
1344
def Expires_dbus_property(self):
1345
return datetime_to_dbus(self.expires)
1346
1347
# LastApprovalRequest - property
1348
@dbus_service_property(_interface, signature="s", access="read")
1349
def LastApprovalRequest_dbus_property(self):
1350
return datetime_to_dbus(self.last_approval_request)
1351
1352
# Timeout - property
1353
@dbus_service_property(_interface, signature="t",
1354
access="readwrite")
1355
def Timeout_dbus_property(self, value=None):
905
1356
if value is None: # get
906
1357
return dbus.UInt64(self.timeout_milliseconds())
907
1358
self.timeout = datetime.timedelta(0, 0, 0, value)
908
# Emit D-Bus signal
909
self.PropertyChanged(dbus.String(u"timeout"),
910
dbus.UInt64(value, variant_level=1))
911
if getattr(self, u"disable_initiator_tag", None) is None:
912
return
913
1359
# Reschedule timeout
914
gobject.source_remove(self.disable_initiator_tag)
915
self.disable_initiator_tag = None
916
time_to_die = (self.
917
_timedelta_to_milliseconds((self
918
.last_checked_ok
919
+ self.timeout)
920
- datetime.datetime
921
.utcnow()))
922
if time_to_die <= 0:
923
# The timeout has passed
924
self.disable()
925
else:
926
self.disable_initiator_tag = (gobject.timeout_add
927
(time_to_die, self.disable))
928
929
# interval - property
930
@dbus_service_property(_interface, signature=u"t",
931
access=u"readwrite")
932
def interval_dbus_property(self, value=None):
1360
if self.enabled:
1361
now = datetime.datetime.utcnow()
1362
time_to_die = timedelta_to_milliseconds(
1363
(self.last_checked_ok + self.timeout) - now)
1364
if time_to_die <= 0:
1365
# The timeout has passed
1366
self.disable()
1367
else:
1368
self.expires = (now +
1369
datetime.timedelta(milliseconds =
1370
time_to_die))
1371
if (getattr(self, "disable_initiator_tag", None)
1372
is None):
1373
return
1374
gobject.source_remove(self.disable_initiator_tag)
1375
self.disable_initiator_tag = (gobject.timeout_add
1376
(time_to_die,
1377
self.disable))
1378
1379
# ExtendedTimeout - property
1380
@dbus_service_property(_interface, signature="t",
1381
access="readwrite")
1382
def ExtendedTimeout_dbus_property(self, value=None):
1383
if value is None: # get
1384
return dbus.UInt64(self.extended_timeout_milliseconds())
1385
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1386
1387
# Interval - property
1388
@dbus_service_property(_interface, signature="t",
1389
access="readwrite")
1390
def Interval_dbus_property(self, value=None):
933
1391
if value is None: # get
934
1392
return dbus.UInt64(self.interval_milliseconds())
935
1393
self.interval = datetime.timedelta(0, 0, 0, value)
936
# Emit D-Bus signal
937
self.PropertyChanged(dbus.String(u"interval"),
938
dbus.UInt64(value, variant_level=1))
939
if getattr(self, u"checker_initiator_tag", None) is None:
1394
if getattr(self, "checker_initiator_tag", None) is None:
940
1395
return
941
# Reschedule checker run
942
gobject.source_remove(self.checker_initiator_tag)
943
self.checker_initiator_tag = (gobject.timeout_add
944
(value, self.start_checker))
945
self.start_checker() # Start one now, too
946
947
# checker - property
948
@dbus_service_property(_interface, signature=u"s",
949
access=u"readwrite")
950
def checker_dbus_property(self, value=None):
1396
if self.enabled:
1397
# Reschedule checker run
1398
gobject.source_remove(self.checker_initiator_tag)
1399
self.checker_initiator_tag = (gobject.timeout_add
1400
(value, self.start_checker))
1401
self.start_checker() # Start one now, too
1402
1403
# Checker - property
1404
@dbus_service_property(_interface, signature="s",
1405
access="readwrite")
1406
def Checker_dbus_property(self, value=None):
951
1407
if value is None: # get
952
1408
return dbus.String(self.checker_command)
953
self.checker_command = value
954
# Emit D-Bus signal
955
self.PropertyChanged(dbus.String(u"checker"),
956
dbus.String(self.checker_command,
957
variant_level=1))
1409
self.checker_command = unicode(value)
958
1410
959
# checker_running - property
960
@dbus_service_property(_interface, signature=u"b",
961
access=u"readwrite")
962
def checker_running_dbus_property(self, value=None):
1411
# CheckerRunning - property
1412
@dbus_service_property(_interface, signature="b",
1413
access="readwrite")
1414
def CheckerRunning_dbus_property(self, value=None):
963
1415
if value is None: # get
964
1416
return dbus.Boolean(self.checker is not None)
965
1417
if value:
967
1419
else:
968
1420
self.stop_checker()
969
1421
970
# object_path - property
971
@dbus_service_property(_interface, signature=u"o", access=u"read")
972
def object_path_dbus_property(self):
1422
# ObjectPath - property
1423
@dbus_service_property(_interface, signature="o", access="read")
1424
def ObjectPath_dbus_property(self):
973
1425
return self.dbus_object_path # is already a dbus.ObjectPath
974
1426
975
# secret = property
976
@dbus_service_property(_interface, signature=u"ay",
977
access=u"write", byte_arrays=True)
978
def secret_dbus_property(self, value):
1427
# Secret = property
1428
@dbus_service_property(_interface, signature="ay",
1429
access="write", byte_arrays=True)
1430
def Secret_dbus_property(self, value):
979
1431
self.secret = str(value)
980
1432
981
1433
del _interface
982
1434
983
1435
1436
class ProxyClient(object):
1437
def __init__(self, child_pipe, fpr, address):
1438
self._pipe = child_pipe
1439
self._pipe.send(('init', fpr, address))
1440
if not self._pipe.recv():
1441
raise KeyError()
1442
1443
def __getattribute__(self, name):
1444
if name == '_pipe':
1445
return super(ProxyClient, self).__getattribute__(name)
1446
self._pipe.send(('getattr', name))
1447
data = self._pipe.recv()
1448
if data[0] == 'data':
1449
return data[1]
1450
if data[0] == 'function':
1451
def func(*args, **kwargs):
1452
self._pipe.send(('funcall', name, args, kwargs))
1453
return self._pipe.recv()[1]
1454
return func
1455
1456
def __setattr__(self, name, value):
1457
if name == '_pipe':
1458
return super(ProxyClient, self).__setattr__(name, value)
1459
self._pipe.send(('setattr', name, value))
1460
1461
1462
class ClientDBusTransitional(ClientDBus):
1463
__metaclass__ = AlternateDBusNamesMetaclass
1464
1465
984
1466
class ClientHandler(socketserver.BaseRequestHandler, object):
985
1467
"""A class to handle client connections.
986
1468
988
1470
Note: This will run in its own forked process."""
989
1471
990
1472
def handle(self):
991
logger.info(u"TCP connection from: %s",
992
unicode(self.client_address))
993
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
994
# Open IPC pipe to parent process
995
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1473
with contextlib.closing(self.server.child_pipe) as child_pipe:
1474
logger.info("TCP connection from: %s",
1475
unicode(self.client_address))
1476
logger.debug("Pipe FD: %d",
1477
self.server.child_pipe.fileno())
1478
996
1479
session = (gnutls.connection
997
1480
.ClientSession(self.request,
998
1481
gnutls.connection
999
1482
.X509Credentials()))
1000
1483
1001
line = self.request.makefile().readline()
1002
logger.debug(u"Protocol version: %r", line)
1003
try:
1004
if int(line.strip().split()[0]) > 1:
1005
raise RuntimeError
1006
except (ValueError, IndexError, RuntimeError), error:
1007
logger.error(u"Unknown protocol version: %s", error)
1008
return
1009
1010
1484
# Note: gnutls.connection.X509Credentials is really a
1011
1485
# generic GnuTLS certificate credentials object so long as
1012
1486
# no X.509 keys are added to it. Therefore, we can use it
1013
1487
# here despite using OpenPGP certificates.
1014
1488
1015
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1016
# u"+AES-256-CBC", u"+SHA1",
1017
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1018
# u"+DHE-DSS"))
1489
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1490
# "+AES-256-CBC", "+SHA1",
1491
# "+COMP-NULL", "+CTYPE-OPENPGP",
1492
# "+DHE-DSS"))
1019
1493
# Use a fallback default, since this MUST be set.
1020
1494
priority = self.server.gnutls_priority
1021
1495
if priority is None:
1022
priority = u"NORMAL"
1496
priority = "NORMAL"
1023
1497
(gnutls.library.functions
1024
1498
.gnutls_priority_set_direct(session._c_object,
1025
1499
priority, None))
1026
1500
1501
# Start communication using the Mandos protocol
1502
# Get protocol number
1503
line = self.request.makefile().readline()
1504
logger.debug("Protocol version: %r", line)
1505
try:
1506
if int(line.strip().split()[0]) > 1:
1507
raise RuntimeError
1508
except (ValueError, IndexError, RuntimeError) as error:
1509
logger.error("Unknown protocol version: %s", error)
1510
return
1511
1512
# Start GnuTLS connection
1027
1513
try:
1028
1514
session.handshake()
1029
except gnutls.errors.GNUTLSError, error:
1030
logger.warning(u"Handshake failed: %s", error)
1515
except gnutls.errors.GNUTLSError as error:
1516
logger.warning("Handshake failed: %s", error)
1031
1517
# Do not run session.bye() here: the session is not
1032
1518
# established. Just abandon the request.
1033
1519
return
1034
logger.debug(u"Handshake succeeded")
1520
logger.debug("Handshake succeeded")
1521
1522
approval_required = False
1035
1523
try:
1036
fpr = self.fingerprint(self.peer_certificate(session))
1037
except (TypeError, gnutls.errors.GNUTLSError), error:
1038
logger.warning(u"Bad certificate: %s", error)
1039
session.bye()
1040
return
1041
logger.debug(u"Fingerprint: %s", fpr)
1524
try:
1525
fpr = self.fingerprint(self.peer_certificate
1526
(session))
1527
except (TypeError,
1528
gnutls.errors.GNUTLSError) as error:
1529
logger.warning("Bad certificate: %s", error)
1530
return
1531
logger.debug("Fingerprint: %s", fpr)
1532
1533
try:
1534
client = ProxyClient(child_pipe, fpr,
1535
self.client_address)
1536
except KeyError:
1537
return
1538
1539
if client.approval_delay:
1540
delay = client.approval_delay
1541
client.approvals_pending += 1
1542
approval_required = True
1543
1544
while True:
1545
if not client.enabled:
1546
logger.info("Client %s is disabled",
1547
client.name)
1548
if self.server.use_dbus:
1549
# Emit D-Bus signal
1550
client.Rejected("Disabled")
1551
return
1552
1553
if client.approved or not client.approval_delay:
1554
#We are approved or approval is disabled
1555
break
1556
elif client.approved is None:
1557
logger.info("Client %s needs approval",
1558
client.name)
1559
if self.server.use_dbus:
1560
# Emit D-Bus signal
1561
client.NeedApproval(
1562
client.approval_delay_milliseconds(),
1563
client.approved_by_default)
1564
else:
1565
logger.warning("Client %s was not approved",
1566
client.name)
1567
if self.server.use_dbus:
1568
# Emit D-Bus signal
1569
client.Rejected("Denied")
1570
return
1571
1572
#wait until timeout or approved
1573
time = datetime.datetime.now()
1574
client.changedstate.acquire()
1575
(client.changedstate.wait
1576
(float(client.timedelta_to_milliseconds(delay)
1577
/ 1000)))
1578
client.changedstate.release()
1579
time2 = datetime.datetime.now()
1580
if (time2 - time) >= delay:
1581
if not client.approved_by_default:
1582
logger.warning("Client %s timed out while"
1583
" waiting for approval",
1584
client.name)
1585
if self.server.use_dbus:
1586
# Emit D-Bus signal
1587
client.Rejected("Approval timed out")
1588
return
1589
else:
1590
break
1591
else:
1592
delay -= time2 - time
1593
1594
sent_size = 0
1595
while sent_size < len(client.secret):
1596
try:
1597
sent = session.send(client.secret[sent_size:])
1598
except gnutls.errors.GNUTLSError as error:
1599
logger.warning("gnutls send failed")
1600
return
1601
logger.debug("Sent: %d, remaining: %d",
1602
sent, len(client.secret)
1603
- (sent_size + sent))
1604
sent_size += sent
1605
1606
logger.info("Sending secret to %s", client.name)
1607
# bump the timeout using extended_timeout
1608
client.checked_ok(client.extended_timeout)
1609
if self.server.use_dbus:
1610
# Emit D-Bus signal
1611
client.GotSecret()
1042
1612
1043
for c in self.server.clients:
1044
if c.fingerprint == fpr:
1045
client = c
1046
break
1047
else:
1048
ipc.write(u"NOTFOUND %s %s\n"
1049
% (fpr, unicode(self.client_address)))
1050
session.bye()
1051
return
1052
# Have to check if client.still_valid(), since it is
1053
# possible that the client timed out while establishing
1054
# the GnuTLS session.
1055
if not client.still_valid():
1056
ipc.write(u"INVALID %s\n" % client.name)
1057
session.bye()
1058
return
1059
ipc.write(u"SENDING %s\n" % client.name)
1060
sent_size = 0
1061
while sent_size < len(client.secret):
1062
sent = session.send(client.secret[sent_size:])
1063
logger.debug(u"Sent: %d, remaining: %d",
1064
sent, len(client.secret)
1065
- (sent_size + sent))
1066
sent_size += sent
1067
session.bye()
1613
finally:
1614
if approval_required:
1615
client.approvals_pending -= 1
1616
try:
1617
session.bye()
1618
except gnutls.errors.GNUTLSError as error:
1619
logger.warning("GnuTLS bye failed")
1068
1620
1069
1621
@staticmethod
1070
1622
def peer_certificate(session):
1080
1632
.gnutls_certificate_get_peers
1081
1633
(session._c_object, ctypes.byref(list_size)))
1082
1634
if not bool(cert_list) and list_size.value != 0:
1083
raise gnutls.errors.GNUTLSError(u"error getting peer"
1084
u" certificate")
1635
raise gnutls.errors.GNUTLSError("error getting peer"
1636
" certificate")
1085
1637
if list_size.value == 0:
1086
1638
return None
1087
1639
cert = cert_list[0]
1113
1665
if crtverify.value != 0:
1114
1666
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1115
1667
raise (gnutls.errors.CertificateSecurityError
1116
(u"Verify failed"))
1668
("Verify failed"))
1117
1669
# New buffer for the fingerprint
1118
1670
buf = ctypes.create_string_buffer(20)
1119
1671
buf_len = ctypes.c_size_t()
1126
1678
# Convert the buffer to a Python bytestring
1127
1679
fpr = ctypes.string_at(buf, buf_len.value)
1128
1680
# Convert the bytestring to hexadecimal notation
1129
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1681
hex_fpr = binascii.hexlify(fpr).upper()
1130
1682
return hex_fpr
1131
1683
1132
1684
1133
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1134
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1685
class MultiprocessingMixIn(object):
1686
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1687
def sub_process_main(self, request, address):
1688
try:
1689
self.finish_request(request, address)
1690
except Exception:
1691
self.handle_error(request, address)
1692
self.close_request(request)
1693
1694
def process_request(self, request, address):
1695
"""Start a new process to process the request."""
1696
proc = multiprocessing.Process(target = self.sub_process_main,
1697
args = (request,
1698
address))
1699
proc.start()
1700
return proc
1701
1702
1703
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1704
""" adds a pipe to the MixIn """
1135
1705
def process_request(self, request, client_address):
1136
1706
"""Overrides and wraps the original process_request().
1137
1707
1138
1708
This function creates a new pipe in self.pipe
1139
1709
"""
1140
self.pipe = os.pipe()
1141
super(ForkingMixInWithPipe,
1142
self).process_request(request, client_address)
1143
os.close(self.pipe[1]) # close write end
1144
self.add_pipe(self.pipe[0])
1145
def add_pipe(self, pipe):
1710
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1711
1712
proc = MultiprocessingMixIn.process_request(self, request,
1713
client_address)
1714
self.child_pipe.close()
1715
self.add_pipe(parent_pipe, proc)
1716
1717
def add_pipe(self, parent_pipe, proc):
1146
1718
"""Dummy function; override as necessary"""
1147
os.close(pipe)
1148
1149
1150
class IPv6_TCPServer(ForkingMixInWithPipe,
1719
raise NotImplementedError
1720
1721
1722
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1151
1723
socketserver.TCPServer, object):
1152
1724
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1153
1725
1169
1741
bind to an address or port if they were not specified."""
1170
1742
if self.interface is not None:
1171
1743
if SO_BINDTODEVICE is None:
1172
logger.error(u"SO_BINDTODEVICE does not exist;"
1173
u" cannot bind to interface %s",
1744
logger.error("SO_BINDTODEVICE does not exist;"
1745
" cannot bind to interface %s",
1174
1746
self.interface)
1175
1747
else:
1176
1748
try:
1177
1749
self.socket.setsockopt(socket.SOL_SOCKET,
1178
1750
SO_BINDTODEVICE,
1179
1751
str(self.interface
1180
+ u'\0'))
1181
except socket.error, error:
1752
+ '\0'))
1753
except socket.error as error:
1182
1754
if error[0] == errno.EPERM:
1183
logger.error(u"No permission to"
1184
u" bind to interface %s",
1755
logger.error("No permission to"
1756
" bind to interface %s",
1185
1757
self.interface)
1186
1758
elif error[0] == errno.ENOPROTOOPT:
1187
logger.error(u"SO_BINDTODEVICE not available;"
1188
u" cannot bind to interface %s",
1759
logger.error("SO_BINDTODEVICE not available;"
1760
" cannot bind to interface %s",
1189
1761
self.interface)
1190
1762
else:
1191
1763
raise
1193
1765
if self.server_address[0] or self.server_address[1]:
1194
1766
if not self.server_address[0]:
1195
1767
if self.address_family == socket.AF_INET6:
1196
any_address = u"::" # in6addr_any
1768
any_address = "::" # in6addr_any
1197
1769
else:
1198
1770
any_address = socket.INADDR_ANY
1199
1771
self.server_address = (any_address,
1226
1798
self.enabled = False
1227
1799
self.clients = clients
1228
1800
if self.clients is None:
1229
self.clients = set()
1801
self.clients = {}
1230
1802
self.use_dbus = use_dbus
1231
1803
self.gnutls_priority = gnutls_priority
1232
1804
IPv6_TCPServer.__init__(self, server_address,
1236
1808
def server_activate(self):
1237
1809
if self.enabled:
1238
1810
return socketserver.TCPServer.server_activate(self)
1811
1239
1812
def enable(self):
1240
1813
self.enabled = True
1241
def add_pipe(self, pipe):
1814
1815
def add_pipe(self, parent_pipe, proc):
1242
1816
# Call "handle_ipc" for both data and EOF events
1243
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1244
self.handle_ipc)
1245
def handle_ipc(self, source, condition, file_objects={}):
1817
gobject.io_add_watch(parent_pipe.fileno(),
1818
gobject.IO_IN | gobject.IO_HUP,
1819
functools.partial(self.handle_ipc,
1820
parent_pipe =
1821
parent_pipe,
1822
proc = proc))
1823
1824
def handle_ipc(self, source, condition, parent_pipe=None,
1825
proc = None, client_object=None):
1246
1826
condition_names = {
1247
gobject.IO_IN: u"IN", # There is data to read.
1248
gobject.IO_OUT: u"OUT", # Data can be written (without
1827
gobject.IO_IN: "IN", # There is data to read.
1828
gobject.IO_OUT: "OUT", # Data can be written (without
1249
1829
# blocking).
1250
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1251
gobject.IO_ERR: u"ERR", # Error condition.
1252
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1830
gobject.IO_PRI: "PRI", # There is urgent data to read.
1831
gobject.IO_ERR: "ERR", # Error condition.
1832
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1253
1833
# broken, usually for pipes and
1254
1834
# sockets).
1255
1835
}
1257
1837
for cond, name in
1258
1838
condition_names.iteritems()
1259
1839
if cond & condition)
1260
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1261
conditions_string)
1262
1263
# Turn the pipe file descriptor into a Python file object
1264
if source not in file_objects:
1265
file_objects[source] = os.fdopen(source, u"r", 1)
1266
1267
# Read a line from the file object
1268
cmdline = file_objects[source].readline()
1269
if not cmdline: # Empty line means end of file
1270
# close the IPC pipe
1271
file_objects[source].close()
1272
del file_objects[source]
1273
1274
# Stop calling this function
1275
return False
1276
1277
logger.debug(u"IPC command: %r", cmdline)
1278
1279
# Parse and act on command
1280
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1281
1282
if cmd == u"NOTFOUND":
1283
logger.warning(u"Client not found for fingerprint: %s",
1284
args)
1285
if self.use_dbus:
1286
# Emit D-Bus signal
1287
mandos_dbus_service.ClientNotFound(args)
1288
elif cmd == u"INVALID":
1289
for client in self.clients:
1290
if client.name == args:
1291
logger.warning(u"Client %s is invalid", args)
1292
if self.use_dbus:
1293
# Emit D-Bus signal
1294
client.Rejected()
1295
break
1296
else:
1297
logger.error(u"Unknown client %s is invalid", args)
1298
elif cmd == u"SENDING":
1299
for client in self.clients:
1300
if client.name == args:
1301
logger.info(u"Sending secret to %s", client.name)
1302
client.checked_ok()
1303
if self.use_dbus:
1304
# Emit D-Bus signal
1305
client.GotSecret()
1306
break
1307
else:
1308
logger.error(u"Sending secret to unknown client %s",
1309
args)
1310
else:
1311
logger.error(u"Unknown IPC command: %r", cmdline)
1312
1313
# Keep calling this function
1840
# error, or the other end of multiprocessing.Pipe has closed
1841
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1842
# Wait for other process to exit
1843
proc.join()
1844
return False
1845
1846
# Read a request from the child
1847
request = parent_pipe.recv()
1848
command = request[0]
1849
1850
if command == 'init':
1851
fpr = request[1]
1852
address = request[2]
1853
1854
for c in self.clients.itervalues():
1855
if c.fingerprint == fpr:
1856
client = c
1857
break
1858
else:
1859
logger.info("Client not found for fingerprint: %s, ad"
1860
"dress: %s", fpr, address)
1861
if self.use_dbus:
1862
# Emit D-Bus signal
1863
mandos_dbus_service.ClientNotFound(fpr,
1864
address[0])
1865
parent_pipe.send(False)
1866
return False
1867
1868
gobject.io_add_watch(parent_pipe.fileno(),
1869
gobject.IO_IN | gobject.IO_HUP,
1870
functools.partial(self.handle_ipc,
1871
parent_pipe =
1872
parent_pipe,
1873
proc = proc,
1874
client_object =
1875
client))
1876
parent_pipe.send(True)
1877
# remove the old hook in favor of the new above hook on
1878
# same fileno
1879
return False
1880
if command == 'funcall':
1881
funcname = request[1]
1882
args = request[2]
1883
kwargs = request[3]
1884
1885
parent_pipe.send(('data', getattr(client_object,
1886
funcname)(*args,
1887
**kwargs)))
1888
1889
if command == 'getattr':
1890
attrname = request[1]
1891
if callable(client_object.__getattribute__(attrname)):
1892
parent_pipe.send(('function',))
1893
else:
1894
parent_pipe.send(('data', client_object
1895
.__getattribute__(attrname)))
1896
1897
if command == 'setattr':
1898
attrname = request[1]
1899
value = request[2]
1900
setattr(client_object, attrname, value)
1901
1314
1902
return True
1315
1903
1316
1904
1317
1905
def string_to_delta(interval):
1318
1906
"""Parse a string and return a datetime.timedelta
1319
1907
1320
>>> string_to_delta(u'7d')
1908
>>> string_to_delta('7d')
1321
1909
datetime.timedelta(7)
1322
>>> string_to_delta(u'60s')
1910
>>> string_to_delta('60s')
1323
1911
datetime.timedelta(0, 60)
1324
>>> string_to_delta(u'60m')
1912
>>> string_to_delta('60m')
1325
1913
datetime.timedelta(0, 3600)
1326
>>> string_to_delta(u'24h')
1914
>>> string_to_delta('24h')
1327
1915
datetime.timedelta(1)
1328
>>> string_to_delta(u'1w')
1916
>>> string_to_delta('1w')
1329
1917
datetime.timedelta(7)
1330
>>> string_to_delta(u'5m 30s')
1918
>>> string_to_delta('5m 30s')
1331
1919
datetime.timedelta(0, 330)
1332
1920
"""
1333
1921
timevalue = datetime.timedelta(0)
1335
1923
try:
1336
1924
suffix = unicode(s[-1])
1337
1925
value = int(s[:-1])
1338
if suffix == u"d":
1926
if suffix == "d":
1339
1927
delta = datetime.timedelta(value)
1340
elif suffix == u"s":
1928
elif suffix == "s":
1341
1929
delta = datetime.timedelta(0, value)
1342
elif suffix == u"m":
1930
elif suffix == "m":
1343
1931
delta = datetime.timedelta(0, 0, 0, 0, value)
1344
elif suffix == u"h":
1932
elif suffix == "h":
1345
1933
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1346
elif suffix == u"w":
1934
elif suffix == "w":
1347
1935
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1348
1936
else:
1349
raise ValueError(u"Unknown suffix %r" % suffix)
1350
except (ValueError, IndexError), e:
1351
raise ValueError(e.message)
1937
raise ValueError("Unknown suffix %r" % suffix)
1938
except (ValueError, IndexError) as e:
1939
raise ValueError(*(e.args))
1352
1940
timevalue += delta
1353
1941
return timevalue
1354
1942
1355
1943
1356
def if_nametoindex(interface):
1357
"""Call the C function if_nametoindex(), or equivalent
1358
1359
Note: This function cannot accept a unicode string."""
1360
global if_nametoindex
1361
try:
1362
if_nametoindex = (ctypes.cdll.LoadLibrary
1363
(ctypes.util.find_library(u"c"))
1364
.if_nametoindex)
1365
except (OSError, AttributeError):
1366
logger.warning(u"Doing if_nametoindex the hard way")
1367
def if_nametoindex(interface):
1368
"Get an interface index the hard way, i.e. using fcntl()"
1369
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1370
with closing(socket.socket()) as s:
1371
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1372
struct.pack(str(u"16s16x"),
1373
interface))
1374
interface_index = struct.unpack(str(u"I"),
1375
ifreq[16:20])[0]
1376
return interface_index
1377
return if_nametoindex(interface)
1378
1379
1380
1944
def daemon(nochdir = False, noclose = False):
1381
1945
"""See daemon(3). Standard BSD Unix function.
1382
1946
1385
1949
sys.exit()
1386
1950
os.setsid()
1387
1951
if not nochdir:
1388
os.chdir(u"/")
1952
os.chdir("/")
1389
1953
if os.fork():
1390
1954
sys.exit()
1391
1955
if not noclose:
1393
1957
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1394
1958
if not stat.S_ISCHR(os.fstat(null).st_mode):
1395
1959
raise OSError(errno.ENODEV,
1396
u"%s not a character device"
1960
"%s not a character device"
1397
1961
% os.path.devnull)
1398
1962
os.dup2(null, sys.stdin.fileno())
1399
1963
os.dup2(null, sys.stdout.fileno())
1407
1971
##################################################################
1408
1972
# Parsing of options, both command line and config file
1409
1973
1410
parser = optparse.OptionParser(version = "%%prog %s" % version)
1411
parser.add_option("-i", u"--interface", type=u"string",
1412
metavar="IF", help=u"Bind to interface IF")
1413
parser.add_option("-a", u"--address", type=u"string",
1414
help=u"Address to listen for requests on")
1415
parser.add_option("-p", u"--port", type=u"int",
1416
help=u"Port number to receive requests on")
1417
parser.add_option("--check", action=u"store_true",
1418
help=u"Run self-test")
1419
parser.add_option("--debug", action=u"store_true",
1420
help=u"Debug mode; run in foreground and log to"
1421
u" terminal")
1422
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1423
u" priority string (see GnuTLS documentation)")
1424
parser.add_option("--servicename", type=u"string",
1425
metavar=u"NAME", help=u"Zeroconf service name")
1426
parser.add_option("--configdir", type=u"string",
1427
default=u"/etc/mandos", metavar=u"DIR",
1428
help=u"Directory to search for configuration"
1429
u" files")
1430
parser.add_option("--no-dbus", action=u"store_false",
1431
dest=u"use_dbus", help=u"Do not provide D-Bus"
1432
u" system bus interface")
1433
parser.add_option("--no-ipv6", action=u"store_false",
1434
dest=u"use_ipv6", help=u"Do not use IPv6")
1435
options = parser.parse_args()[0]
1974
parser = argparse.ArgumentParser()
1975
parser.add_argument("-v", "--version", action="version",
1976
version = "%%(prog)s %s" % version,
1977
help="show version number and exit")
1978
parser.add_argument("-i", "--interface", metavar="IF",
1979
help="Bind to interface IF")
1980
parser.add_argument("-a", "--address",
1981
help="Address to listen for requests on")
1982
parser.add_argument("-p", "--port", type=int,
1983
help="Port number to receive requests on")
1984
parser.add_argument("--check", action="store_true",
1985
help="Run self-test")
1986
parser.add_argument("--debug", action="store_true",
1987
help="Debug mode; run in foreground and log"
1988
" to terminal")
1989
parser.add_argument("--debuglevel", metavar="LEVEL",
1990
help="Debug level for stdout output")
1991
parser.add_argument("--priority", help="GnuTLS"
1992
" priority string (see GnuTLS documentation)")
1993
parser.add_argument("--servicename",
1994
metavar="NAME", help="Zeroconf service name")
1995
parser.add_argument("--configdir",
1996
default="/etc/mandos", metavar="DIR",
1997
help="Directory to search for configuration"
1998
" files")
1999
parser.add_argument("--no-dbus", action="store_false",
2000
dest="use_dbus", help="Do not provide D-Bus"
2001
" system bus interface")
2002
parser.add_argument("--no-ipv6", action="store_false",
2003
dest="use_ipv6", help="Do not use IPv6")
2004
parser.add_argument("--no-restore", action="store_false",
2005
dest="restore", help="Do not restore stored"
2006
" state")
2007
parser.add_argument("--statedir", metavar="DIR",
2008
help="Directory to save/restore state in")
2009
2010
options = parser.parse_args()
1436
2011
1437
2012
if options.check:
1438
2013
import doctest
1440
2015
sys.exit()
1441
2016
1442
2017
# Default values for config file for server-global settings
1443
server_defaults = { u"interface": u"",
1444
u"address": u"",
1445
u"port": u"",
1446
u"debug": u"False",
1447
u"priority":
1448
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1449
u"servicename": u"Mandos",
1450
u"use_dbus": u"True",
1451
u"use_ipv6": u"True",
2018
server_defaults = { "interface": "",
2019
"address": "",
2020
"port": "",
2021
"debug": "False",
2022
"priority":
2023
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2024
"servicename": "Mandos",
2025
"use_dbus": "True",
2026
"use_ipv6": "True",
2027
"debuglevel": "",
2028
"restore": "True",
2029
"statedir": "/var/lib/mandos"
1452
2030
}
1453
2031
1454
2032
# Parse config file for server-global settings
1455
2033
server_config = configparser.SafeConfigParser(server_defaults)
1456
2034
del server_defaults
1457
2035
server_config.read(os.path.join(options.configdir,
1458
u"mandos.conf"))
2036
"mandos.conf"))
1459
2037
# Convert the SafeConfigParser object to a dict
1460
2038
server_settings = server_config.defaults()
1461
2039
# Use the appropriate methods on the non-string config options
1462
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1463
server_settings[option] = server_config.getboolean(u"DEFAULT",
2040
for option in ("debug", "use_dbus", "use_ipv6"):
2041
server_settings[option] = server_config.getboolean("DEFAULT",
1464
2042
option)
1465
2043
if server_settings["port"]:
1466
server_settings["port"] = server_config.getint(u"DEFAULT",
1467
u"port")
2044
server_settings["port"] = server_config.getint("DEFAULT",
2045
"port")
1468
2046
del server_config
1469
2047
1470
2048
# Override the settings from the config file with command line
1471
2049
# options, if set.
1472
for option in (u"interface", u"address", u"port", u"debug",
1473
u"priority", u"servicename", u"configdir",
1474
u"use_dbus", u"use_ipv6"):
2050
for option in ("interface", "address", "port", "debug",
2051
"priority", "servicename", "configdir",
2052
"use_dbus", "use_ipv6", "debuglevel", "restore",
2053
"statedir"):
1475
2054
value = getattr(options, option)
1476
2055
if value is not None:
1477
2056
server_settings[option] = value
1485
2064
##################################################################
1486
2065
1487
2066
# For convenience
1488
debug = server_settings[u"debug"]
1489
use_dbus = server_settings[u"use_dbus"]
1490
use_ipv6 = server_settings[u"use_ipv6"]
1491
1492
if not debug:
1493
syslogger.setLevel(logging.WARNING)
1494
console.setLevel(logging.WARNING)
1495
1496
if server_settings[u"servicename"] != u"Mandos":
2067
debug = server_settings["debug"]
2068
debuglevel = server_settings["debuglevel"]
2069
use_dbus = server_settings["use_dbus"]
2070
use_ipv6 = server_settings["use_ipv6"]
2071
stored_state_path = os.path.join(server_settings["statedir"],
2072
stored_state_file)
2073
2074
if debug:
2075
initlogger(debug, logging.DEBUG)
2076
else:
2077
if not debuglevel:
2078
initlogger(debug)
2079
else:
2080
level = getattr(logging, debuglevel.upper())
2081
initlogger(debug, level)
2082
2083
if server_settings["servicename"] != "Mandos":
1497
2084
syslogger.setFormatter(logging.Formatter
1498
(u'Mandos (%s) [%%(process)d]:'
1499
u' %%(levelname)s: %%(message)s'
1500
% server_settings[u"servicename"]))
2085
('Mandos (%s) [%%(process)d]:'
2086
' %%(levelname)s: %%(message)s'
2087
% server_settings["servicename"]))
1501
2088
1502
2089
# Parse config file with clients
1503
client_defaults = { u"timeout": u"1h",
1504
u"interval": u"5m",
1505
u"checker": u"fping -q -- %%(host)s",
1506
u"host": u"",
1507
}
1508
client_config = configparser.SafeConfigParser(client_defaults)
1509
client_config.read(os.path.join(server_settings[u"configdir"],
1510
u"clients.conf"))
2090
client_config = configparser.SafeConfigParser(Client
2091
.client_defaults)
2092
client_config.read(os.path.join(server_settings["configdir"],
2093
"clients.conf"))
1511
2094
1512
2095
global mandos_dbus_service
1513
2096
mandos_dbus_service = None
1514
2097
1515
tcp_server = MandosServer((server_settings[u"address"],
1516
server_settings[u"port"]),
2098
tcp_server = MandosServer((server_settings["address"],
2099
server_settings["port"]),
1517
2100
ClientHandler,
1518
interface=server_settings[u"interface"],
2101
interface=(server_settings["interface"]
2102
or None),
1519
2103
use_ipv6=use_ipv6,
1520
2104
gnutls_priority=
1521
server_settings[u"priority"],
2105
server_settings["priority"],
1522
2106
use_dbus=use_dbus)
1523
pidfilename = u"/var/run/mandos.pid"
1524
try:
1525
pidfile = open(pidfilename, u"w")
1526
except IOError:
1527
logger.error(u"Could not open file %r", pidfilename)
2107
if not debug:
2108
pidfilename = "/var/run/mandos.pid"
2109
try:
2110
pidfile = open(pidfilename, "w")
2111
except IOError:
2112
logger.error("Could not open file %r", pidfilename)
1528
2113
1529
2114
try:
1530
uid = pwd.getpwnam(u"_mandos").pw_uid
1531
gid = pwd.getpwnam(u"_mandos").pw_gid
2115
uid = pwd.getpwnam("_mandos").pw_uid
2116
gid = pwd.getpwnam("_mandos").pw_gid
1532
2117
except KeyError:
1533
2118
try:
1534
uid = pwd.getpwnam(u"mandos").pw_uid
1535
gid = pwd.getpwnam(u"mandos").pw_gid
2119
uid = pwd.getpwnam("mandos").pw_uid
2120
gid = pwd.getpwnam("mandos").pw_gid
1536
2121
except KeyError:
1537
2122
try:
1538
uid = pwd.getpwnam(u"nobody").pw_uid
1539
gid = pwd.getpwnam(u"nobody").pw_gid
2123
uid = pwd.getpwnam("nobody").pw_uid
2124
gid = pwd.getpwnam("nobody").pw_gid
1540
2125
except KeyError:
1541
2126
uid = 65534
1542
2127
gid = 65534
1543
2128
try:
1544
2129
os.setgid(gid)
1545
2130
os.setuid(uid)
1546
except OSError, error:
2131
except OSError as error:
1547
2132
if error[0] != errno.EPERM:
1548
2133
raise error
1549
2134
1550
# Enable all possible GnuTLS debugging
1551
2135
if debug:
2136
# Enable all possible GnuTLS debugging
2137
1552
2138
# "Use a log level over 10 to enable all debugging options."
1553
2139
# - GnuTLS manual
1554
2140
gnutls.library.functions.gnutls_global_set_log_level(11)
1555
2141
1556
2142
@gnutls.library.types.gnutls_log_func
1557
2143
def debug_gnutls(level, string):
1558
logger.debug(u"GnuTLS: %s", string[:-1])
2144
logger.debug("GnuTLS: %s", string[:-1])
1559
2145
1560
2146
(gnutls.library.functions
1561
2147
.gnutls_global_set_log_function(debug_gnutls))
2148
2149
# Redirect stdin so all checkers get /dev/null
2150
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2151
os.dup2(null, sys.stdin.fileno())
2152
if null > 2:
2153
os.close(null)
2154
2155
# Need to fork before connecting to D-Bus
2156
if not debug:
2157
# Close all input and output, do double fork, etc.
2158
daemon()
2159
2160
gobject.threads_init()
1562
2161
1563
2162
global main_loop
1564
2163
# From the Avahi example code
1568
2167
# End of Avahi example code
1569
2168
if use_dbus:
1570
2169
try:
1571
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
2170
bus_name = dbus.service.BusName("se.recompile.Mandos",
1572
2171
bus, do_not_queue=True)
1573
except dbus.exceptions.NameExistsException, e:
1574
logger.error(unicode(e) + u", disabling D-Bus")
2172
old_bus_name = (dbus.service.BusName
2173
("se.bsnet.fukt.Mandos", bus,
2174
do_not_queue=True))
2175
except dbus.exceptions.NameExistsException as e:
2176
logger.error(unicode(e) + ", disabling D-Bus")
1575
2177
use_dbus = False
1576
server_settings[u"use_dbus"] = False
2178
server_settings["use_dbus"] = False
1577
2179
tcp_server.use_dbus = False
1578
2180
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1579
service = AvahiService(name = server_settings[u"servicename"],
1580
servicetype = u"_mandos._tcp",
1581
protocol = protocol, bus = bus)
2181
service = AvahiServiceToSyslog(name =
2182
server_settings["servicename"],
2183
servicetype = "_mandos._tcp",
2184
protocol = protocol, bus = bus)
1582
2185
if server_settings["interface"]:
1583
2186
service.interface = (if_nametoindex
1584
(str(server_settings[u"interface"])))
2187
(str(server_settings["interface"])))
2188
2189
global multiprocessing_manager
2190
multiprocessing_manager = multiprocessing.Manager()
1585
2191
1586
2192
client_class = Client
1587
2193
if use_dbus:
1588
client_class = functools.partial(ClientDBus, bus = bus)
1589
tcp_server.clients.update(set(
1590
client_class(name = section,
1591
config= dict(client_config.items(section)))
1592
for section in client_config.sections()))
2194
client_class = functools.partial(ClientDBusTransitional,
2195
bus = bus)
2196
2197
client_settings = Client.config_parser(client_config)
2198
old_client_settings = {}
2199
clients_data = {}
2200
2201
# Get client data and settings from last running state.
2202
if server_settings["restore"]:
2203
try:
2204
with open(stored_state_path, "rb") as stored_state:
2205
clients_data, old_client_settings = (pickle.load
2206
(stored_state))
2207
os.remove(stored_state_path)
2208
except IOError as e:
2209
logger.warning("Could not load persistent state: {0}"
2210
.format(e))
2211
if e.errno != errno.ENOENT:
2212
raise
2213
except EOFError as e:
2214
logger.warning("Could not load persistent state: "
2215
"EOFError: {0}".format(e))
2216
2217
with PGPEngine() as pgp:
2218
for client_name, client in clients_data.iteritems():
2219
# Decide which value to use after restoring saved state.
2220
# We have three different values: Old config file,
2221
# new config file, and saved state.
2222
# New config value takes precedence if it differs from old
2223
# config value, otherwise use saved state.
2224
for name, value in client_settings[client_name].items():
2225
try:
2226
# For each value in new config, check if it
2227
# differs from the old config value (Except for
2228
# the "secret" attribute)
2229
if (name != "secret" and
2230
value != old_client_settings[client_name]
2231
[name]):
2232
client[name] = value
2233
except KeyError:
2234
pass
2235
2236
# Clients who has passed its expire date can still be
2237
# enabled if its last checker was successful. Clients
2238
# whose checker succeeded before we stored its state is
2239
# assumed to have successfully run all checkers during
2240
# downtime.
2241
if client["enabled"]:
2242
if datetime.datetime.utcnow() >= client["expires"]:
2243
if not client["last_checked_ok"]:
2244
logger.warning(
2245
"disabling client {0} - Client never "
2246
"performed a successful checker"
2247
.format(client_name))
2248
client["enabled"] = False
2249
elif client["last_checker_status"] != 0:
2250
logger.warning(
2251
"disabling client {0} - Client "
2252
"last checker failed with error code {1}"
2253
.format(client_name,
2254
client["last_checker_status"]))
2255
client["enabled"] = False
2256
else:
2257
client["expires"] = (datetime.datetime
2258
.utcnow()
2259
+ client["timeout"])
2260
logger.debug("Last checker succeeded,"
2261
" keeping {0} enabled"
2262
.format(client_name))
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)
2278
- set(client_settings)):
2279
del clients_data[client_name]
2280
for client_name in (set(client_settings)
2281
- set(old_client_settings)):
2282
clients_data[client_name] = client_settings[client_name]
2283
2284
# Create all client objects
2285
for client_name, client in clients_data.iteritems():
2286
tcp_server.clients[client_name] = client_class(
2287
name = client_name, settings = client)
2288
1593
2289
if not tcp_server.clients:
1594
logger.warning(u"No clients defined")
1595
1596
if debug:
1597
# Redirect stdin so all checkers get /dev/null
1598
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1599
os.dup2(null, sys.stdin.fileno())
1600
if null > 2:
1601
os.close(null)
1602
else:
1603
# No console logging
1604
logger.removeHandler(console)
1605
# Close all input and output, do double fork, etc.
1606
daemon()
1607
1608
try:
1609
with closing(pidfile):
1610
pid = os.getpid()
1611
pidfile.write(str(pid) + "\n")
1612
del pidfile
1613
except IOError:
1614
logger.error(u"Could not write to file %r with PID %d",
1615
pidfilename, pid)
1616
except NameError:
1617
# "pidfile" was never created
1618
pass
1619
del pidfilename
1620
2290
logger.warning("No clients defined")
2291
1621
2292
if not debug:
2293
try:
2294
with pidfile:
2295
pid = os.getpid()
2296
pidfile.write(str(pid) + "\n".encode("utf-8"))
2297
del pidfile
2298
except IOError:
2299
logger.error("Could not write to file %r with PID %d",
2300
pidfilename, pid)
2301
except NameError:
2302
# "pidfile" was never created
2303
pass
2304
del pidfilename
1622
2305
signal.signal(signal.SIGINT, signal.SIG_IGN)
2306
1623
2307
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1624
2308
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1625
2309
1627
2311
class MandosDBusService(dbus.service.Object):
1628
2312
"""A D-Bus proxy object"""
1629
2313
def __init__(self):
1630
dbus.service.Object.__init__(self, bus, u"/")
1631
_interface = u"se.bsnet.fukt.Mandos"
1632
1633
@dbus.service.signal(_interface, signature=u"oa{sv}")
1634
def ClientAdded(self, objpath, properties):
1635
"D-Bus signal"
1636
pass
1637
1638
@dbus.service.signal(_interface, signature=u"s")
1639
def ClientNotFound(self, fingerprint):
1640
"D-Bus signal"
1641
pass
1642
1643
@dbus.service.signal(_interface, signature=u"os")
2314
dbus.service.Object.__init__(self, bus, "/")
2315
_interface = "se.recompile.Mandos"
2316
2317
@dbus.service.signal(_interface, signature="o")
2318
def ClientAdded(self, objpath):
2319
"D-Bus signal"
2320
pass
2321
2322
@dbus.service.signal(_interface, signature="ss")
2323
def ClientNotFound(self, fingerprint, address):
2324
"D-Bus signal"
2325
pass
2326
2327
@dbus.service.signal(_interface, signature="os")
1644
2328
def ClientRemoved(self, objpath, name):
1645
2329
"D-Bus signal"
1646
2330
pass
1647
2331
1648
@dbus.service.method(_interface, out_signature=u"ao")
2332
@dbus.service.method(_interface, out_signature="ao")
1649
2333
def GetAllClients(self):
1650
2334
"D-Bus method"
1651
2335
return dbus.Array(c.dbus_object_path
1652
for c in tcp_server.clients)
2336
for c in
2337
tcp_server.clients.itervalues())
1653
2338
1654
2339
@dbus.service.method(_interface,
1655
out_signature=u"a{oa{sv}}")
2340
out_signature="a{oa{sv}}")
1656
2341
def GetAllClientsWithProperties(self):
1657
2342
"D-Bus method"
1658
2343
return dbus.Dictionary(
1659
((c.dbus_object_path, c.GetAll(u""))
1660
for c in tcp_server.clients),
1661
signature=u"oa{sv}")
2344
((c.dbus_object_path, c.GetAll(""))
2345
for c in tcp_server.clients.itervalues()),
2346
signature="oa{sv}")
1662
2347
1663
@dbus.service.method(_interface, in_signature=u"o")
2348
@dbus.service.method(_interface, in_signature="o")
1664
2349
def RemoveClient(self, object_path):
1665
2350
"D-Bus method"
1666
for c in tcp_server.clients:
2351
for c in tcp_server.clients.itervalues():
1667
2352
if c.dbus_object_path == object_path:
1668
tcp_server.clients.remove(c)
2353
del tcp_server.clients[c.name]
1669
2354
c.remove_from_connection()
1670
2355
# Don't signal anything except ClientRemoved
1671
2356
c.disable(quiet=True)
1676
2361
1677
2362
del _interface
1678
2363
1679
mandos_dbus_service = MandosDBusService()
2364
class MandosDBusServiceTransitional(MandosDBusService):
2365
__metaclass__ = AlternateDBusNamesMetaclass
2366
mandos_dbus_service = MandosDBusServiceTransitional()
1680
2367
1681
2368
def cleanup():
1682
2369
"Cleanup function; run on exit"
1683
2370
service.cleanup()
1684
2371
2372
multiprocessing.active_children()
2373
if not (tcp_server.clients or client_settings):
2374
return
2375
2376
# Store client before exiting. Secrets are encrypted with key
2377
# based on what config file has. If config file is
2378
# removed/edited, old secret will thus be unrecovable.
2379
clients = {}
2380
with PGPEngine() as pgp:
2381
for client in tcp_server.clients.itervalues():
2382
key = client_settings[client.name]["secret"]
2383
client.encrypted_secret = pgp.encrypt(client.secret,
2384
key)
2385
client_dict = {}
2386
2387
# A list of attributes that can not be pickled
2388
# + secret.
2389
exclude = set(("bus", "changedstate", "secret",
2390
"checker"))
2391
for name, typ in (inspect.getmembers
2392
(dbus.service.Object)):
2393
exclude.add(name)
2394
2395
client_dict["encrypted_secret"] = (client
2396
.encrypted_secret)
2397
for attr in client.client_structure:
2398
if attr not in exclude:
2399
client_dict[attr] = getattr(client, attr)
2400
2401
clients[client.name] = client_dict
2402
del client_settings[client.name]["secret"]
2403
2404
try:
2405
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2406
prefix="clients-",
2407
dir=os.path.dirname
2408
(stored_state_path))
2409
with os.fdopen(tempfd, "wb") as stored_state:
2410
pickle.dump((clients, client_settings), stored_state)
2411
os.rename(tempname, stored_state_path)
2412
except (IOError, OSError) as e:
2413
logger.warning("Could not save persistent state: {0}"
2414
.format(e))
2415
if not debug:
2416
try:
2417
os.remove(tempname)
2418
except NameError:
2419
pass
2420
if e.errno not in set((errno.ENOENT, errno.EACCES,
2421
errno.EEXIST)):
2422
raise e
2423
2424
# Delete all clients, and settings from config
1685
2425
while tcp_server.clients:
1686
client = tcp_server.clients.pop()
2426
name, client = tcp_server.clients.popitem()
1687
2427
if use_dbus:
1688
2428
client.remove_from_connection()
1689
client.disable_hook = None
1690
2429
# Don't signal anything except ClientRemoved
1691
2430
client.disable(quiet=True)
1692
2431
if use_dbus:
1693
2432
# Emit D-Bus signal
1694
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2433
mandos_dbus_service.ClientRemoved(client
2434
.dbus_object_path,
1695
2435
client.name)
2436
client_settings.clear()
1696
2437
1697
2438
atexit.register(cleanup)
1698
2439
1699
for client in tcp_server.clients:
2440
for client in tcp_server.clients.itervalues():
1700
2441
if use_dbus:
1701
2442
# Emit D-Bus signal
1702
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1703
client.GetAll(u""))
1704
client.enable()
2443
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2444
# Need to initiate checking of clients
2445
if client.enabled:
2446
client.init_checker()
1705
2447
1706
2448
tcp_server.enable()
1707
2449
tcp_server.server_activate()
1709
2451
# Find out what port we got
1710
2452
service.port = tcp_server.socket.getsockname()[1]
1711
2453
if use_ipv6:
1712
logger.info(u"Now listening on address %r, port %d,"
2454
logger.info("Now listening on address %r, port %d,"
1713
2455
" flowinfo %d, scope_id %d"
1714
2456
% tcp_server.socket.getsockname())
1715
2457
else: # IPv4
1716
logger.info(u"Now listening on address %r, port %d"
2458
logger.info("Now listening on address %r, port %d"
1717
2459
% tcp_server.socket.getsockname())
1718
2460
1719
2461
#service.interface = tcp_server.socket.getsockname()[3]
1722
2464
# From the Avahi example code
1723
2465
try:
1724
2466
service.activate()
1725
except dbus.exceptions.DBusException, error:
1726
logger.critical(u"DBusException: %s", error)
2467
except dbus.exceptions.DBusException as error:
2468
logger.critical("DBusException: %s", error)
1727
2469
cleanup()
1728
2470
sys.exit(1)
1729
2471
# End of Avahi example code
1733
2475
(tcp_server.handle_request
1734
2476
(*args[2:], **kwargs) or True))
1735
2477
1736
logger.debug(u"Starting main loop")
2478
logger.debug("Starting main loop")
1737
2479
main_loop.run()
1738
except AvahiError, error:
1739
logger.critical(u"AvahiError: %s", error)
2480
except AvahiError as error:
2481
logger.critical("AvahiError: %s", error)
1740
2482
cleanup()
1741
2483
sys.exit(1)
1742
2484
except KeyboardInterrupt:
1743
2485
if debug:
1744
print >> sys.stderr
1745
logger.debug(u"Server received KeyboardInterrupt")
1746
logger.debug(u"Server exiting")
2486
print("", file=sys.stderr)
2487
logger.debug("Server received KeyboardInterrupt")
2488
logger.debug("Server exiting")
1747
2489
# Must run before the D-Bus bus name gets deregistered
1748
2490
cleanup()
1749
2491
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0