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- Committer: Teddy Hogeborn
- Date: 2009-11-03 00:12:35 UTC
- Revision ID: teddy@fukt.bsnet.se-20091103001235-op9jfvtx6xvxch3h
* README (FAQ): Fix typo.
* mandos (main): Try to always do cleanup() before exit, since
otherwise the D-Bus bus name gets unregistered first.
* mandos (main): Try to always do cleanup() before exit, since
otherwise the D-Bus bus name gets unregistered first.
- files removed:
- 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 © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
14
# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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16
#
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# This program is free software: you can redistribute it and/or modify
18
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# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
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# <http://www.gnu.org/licenses/>.
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#
31
# Contact the authors at <mandos@recompile.se>.
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
#
33
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
34
from __future__ import division, with_statement, absolute_import
36
35
37
36
import SocketServer as socketserver
38
37
import socket
39
import argparse
38
import optparse
40
39
import datetime
41
40
import errno
42
41
import gnutls.crypto
56
55
import logging
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56
import logging.handlers
58
57
import pwd
59
import contextlib
58
from contextlib import closing
60
59
import struct
61
60
import fcntl
62
61
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
67
import tempfile
68
62
69
63
import dbus
70
64
import dbus.service
75
69
import ctypes.util
76
70
import xml.dom.minidom
77
71
import inspect
78
import GnuPGInterface
79
72
80
73
try:
81
74
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
78
except ImportError:
86
79
SO_BINDTODEVICE = None
87
80
88
version = "1.4.1"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
81
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version = "1.0.14"
83
84
logger = logging.Logger(u'mandos')
92
85
syslogger = (logging.handlers.SysLogHandler
93
86
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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
147
def __enter__(self):
148
return self
149
150
def __exit__ (self, exc_type, exc_value, traceback):
151
self._cleanup()
152
return False
153
154
def __del__(self):
155
self._cleanup()
156
157
def _cleanup(self):
158
if self.tempdir is not None:
159
# Delete contents of tempdir
160
for root, dirs, files in os.walk(self.tempdir,
161
topdown = False):
162
for filename in files:
163
os.remove(os.path.join(root, filename))
164
for dirname in dirs:
165
os.rmdir(os.path.join(root, dirname))
166
# Remove tempdir
167
os.rmdir(self.tempdir)
168
self.tempdir = None
169
170
def password_encode(self, password):
171
# Passphrase can not be empty and can not contain newlines or
172
# NUL bytes. So we prefix it and hex encode it.
173
return b"mandos" + binascii.hexlify(password)
174
175
def encrypt(self, data, password):
176
self.gnupg.passphrase = self.password_encode(password)
177
with open(os.devnull) as devnull:
178
try:
179
proc = self.gnupg.run(['--symmetric'],
180
create_fhs=['stdin', 'stdout'],
181
attach_fhs={'stderr': devnull})
182
with contextlib.closing(proc.handles['stdin']) as f:
183
f.write(data)
184
with contextlib.closing(proc.handles['stdout']) as f:
185
ciphertext = f.read()
186
proc.wait()
187
except IOError as e:
188
raise PGPError(e)
189
self.gnupg.passphrase = None
190
return ciphertext
191
192
def decrypt(self, data, password):
193
self.gnupg.passphrase = self.password_encode(password)
194
with open(os.devnull) as devnull:
195
try:
196
proc = self.gnupg.run(['--decrypt'],
197
create_fhs=['stdin', 'stdout'],
198
attach_fhs={'stderr': devnull})
199
with contextlib.closing(proc.handles['stdin'] ) as f:
200
f.write(data)
201
with contextlib.closing(proc.handles['stdout']) as f:
202
decrypted_plaintext = f.read()
203
proc.wait()
204
except IOError as e:
205
raise PGPError(e)
206
self.gnupg.passphrase = None
207
return decrypted_plaintext
208
209
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)
210
98
211
99
class AvahiError(Exception):
212
100
def __init__(self, value, *args, **kwargs):
228
116
Attributes:
229
117
interface: integer; avahi.IF_UNSPEC or an interface index.
230
118
Used to optionally bind to the specified interface.
231
name: string; Example: 'Mandos'
232
type: string; Example: '_mandos._tcp'.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
233
121
See <http://www.dns-sd.org/ServiceTypes.html>
234
122
port: integer; what port to announce
235
123
TXT: list of strings; TXT record for the service
244
132
"""
245
133
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
246
134
servicetype = None, port = None, TXT = None,
247
domain = "", host = "", max_renames = 32768,
135
domain = u"", host = u"", max_renames = 32768,
248
136
protocol = avahi.PROTO_UNSPEC, bus = None):
249
137
self.interface = interface
250
138
self.name = name
259
147
self.group = None # our entry group
260
148
self.server = None
261
149
self.bus = bus
262
self.entry_group_state_changed_match = None
263
150
def rename(self):
264
151
"""Derived from the Avahi example code"""
265
152
if self.rename_count >= self.max_renames:
266
logger.critical("No suitable Zeroconf service name found"
267
" after %i retries, exiting.",
153
logger.critical(u"No suitable Zeroconf service name found"
154
u" after %i retries, exiting.",
268
155
self.rename_count)
269
raise AvahiServiceError("Too many renames")
270
self.name = unicode(self.server
271
.GetAlternativeServiceName(self.name))
272
logger.info("Changing Zeroconf service name to %r ...",
273
self.name)
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))
274
164
self.remove()
275
try:
276
self.add()
277
except dbus.exceptions.DBusException as error:
278
logger.critical("DBusException: %s", error)
279
self.cleanup()
280
os._exit(1)
165
self.add()
281
166
self.rename_count += 1
282
167
def remove(self):
283
168
"""Derived from the Avahi example code"""
284
if self.entry_group_state_changed_match is not None:
285
self.entry_group_state_changed_match.remove()
286
self.entry_group_state_changed_match = None
287
169
if self.group is not None:
288
170
self.group.Reset()
289
171
def add(self):
290
172
"""Derived from the Avahi example code"""
291
self.remove()
292
173
if self.group is None:
293
174
self.group = dbus.Interface(
294
175
self.bus.get_object(avahi.DBUS_NAME,
295
176
self.server.EntryGroupNew()),
296
177
avahi.DBUS_INTERFACE_ENTRY_GROUP)
297
self.entry_group_state_changed_match = (
298
self.group.connect_to_signal(
299
'StateChanged', self.entry_group_state_changed))
300
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
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' ...",
301
182
self.name, self.type)
302
183
self.group.AddService(
303
184
self.interface,
310
191
self.group.Commit()
311
192
def entry_group_state_changed(self, state, error):
312
193
"""Derived from the Avahi example code"""
313
logger.debug("Avahi entry group state change: %i", state)
194
logger.debug(u"Avahi state change: %i", state)
314
195
315
196
if state == avahi.ENTRY_GROUP_ESTABLISHED:
316
logger.debug("Zeroconf service established.")
197
logger.debug(u"Zeroconf service established.")
317
198
elif state == avahi.ENTRY_GROUP_COLLISION:
318
logger.info("Zeroconf service name collision.")
199
logger.warning(u"Zeroconf service name collision.")
319
200
self.rename()
320
201
elif state == avahi.ENTRY_GROUP_FAILURE:
321
logger.critical("Avahi: Error in group state changed %s",
202
logger.critical(u"Avahi: Error in group state changed %s",
322
203
unicode(error))
323
raise AvahiGroupError("State changed: %s"
204
raise AvahiGroupError(u"State changed: %s"
324
205
% unicode(error))
325
206
def cleanup(self):
326
207
"""Derived from the Avahi example code"""
327
208
if self.group is not None:
328
try:
329
self.group.Free()
330
except (dbus.exceptions.UnknownMethodException,
331
dbus.exceptions.DBusException):
332
pass
209
self.group.Free()
333
210
self.group = None
334
self.remove()
335
def server_state_changed(self, state, error=None):
211
def server_state_changed(self, state):
336
212
"""Derived from the Avahi example code"""
337
logger.debug("Avahi server state change: %i", state)
338
bad_states = { avahi.SERVER_INVALID:
339
"Zeroconf server invalid",
340
avahi.SERVER_REGISTERING: None,
341
avahi.SERVER_COLLISION:
342
"Zeroconf server name collision",
343
avahi.SERVER_FAILURE:
344
"Zeroconf server failure" }
345
if state in bad_states:
346
if bad_states[state] is not None:
347
if error is None:
348
logger.error(bad_states[state])
349
else:
350
logger.error(bad_states[state] + ": %r", error)
351
self.cleanup()
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
215
self.remove()
352
216
elif state == avahi.SERVER_RUNNING:
353
217
self.add()
354
else:
355
if error is None:
356
logger.debug("Unknown state: %r", state)
357
else:
358
logger.debug("Unknown state: %r: %r", state, error)
359
218
def activate(self):
360
219
"""Derived from the Avahi example code"""
361
220
if self.server is None:
362
221
self.server = dbus.Interface(
363
222
self.bus.get_object(avahi.DBUS_NAME,
364
avahi.DBUS_PATH_SERVER,
365
follow_name_owner_changes=True),
223
avahi.DBUS_PATH_SERVER),
366
224
avahi.DBUS_INTERFACE_SERVER)
367
self.server.connect_to_signal("StateChanged",
225
self.server.connect_to_signal(u"StateChanged",
368
226
self.server_state_changed)
369
227
self.server_state_changed(self.server.GetState())
370
228
371
class AvahiServiceToSyslog(AvahiService):
372
def rename(self):
373
"""Add the new name to the syslog messages"""
374
ret = AvahiService.rename(self)
375
syslogger.setFormatter(logging.Formatter
376
('Mandos (%s) [%%(process)d]:'
377
' %%(levelname)s: %%(message)s'
378
% self.name))
379
return ret
380
229
381
def timedelta_to_milliseconds(td):
382
"Convert a datetime.timedelta() to milliseconds"
383
return ((td.days * 24 * 60 * 60 * 1000)
384
+ (td.seconds * 1000)
385
+ (td.microseconds // 1000))
386
387
230
class Client(object):
388
231
"""A representation of a client host served by this server.
389
232
390
233
Attributes:
391
approved: bool(); 'None' if not yet approved/disapproved
392
approval_delay: datetime.timedelta(); Time to wait for approval
393
approval_duration: datetime.timedelta(); Duration of one approval
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)
394
248
checker: subprocess.Popen(); a running checker process used
395
249
to see if the client lives.
396
250
'None' if no process is running.
397
checker_callback_tag: a gobject event source tag, or None
398
checker_command: string; External command which is run to check
399
if client lives. %() expansions are done at
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
400
256
runtime with vars(self) as dict, so that for
401
257
instance %(name)s can be used in the command.
402
checker_initiator_tag: a gobject event source tag, or None
403
created: datetime.datetime(); (UTC) object creation
404
client_structure: Object describing what attributes a client has
405
and is used for storing the client at exit
406
258
current_checker_command: string; current running checker_command
407
disable_initiator_tag: a gobject event source tag, or None
408
enabled: bool()
409
fingerprint: string (40 or 32 hexadecimal digits); used to
410
uniquely identify the client
411
host: string; available for use by the checker command
412
interval: datetime.timedelta(); How often to start a new checker
413
last_approval_request: datetime.datetime(); (UTC) or None
414
last_checked_ok: datetime.datetime(); (UTC) or None
415
last_checker_status: integer between 0 and 255 reflecting exit
416
status of last checker. -1 reflects crashed
417
checker, or None.
418
last_enabled: datetime.datetime(); (UTC) or None
419
name: string; from the config file, used in log messages and
420
D-Bus identifiers
421
secret: bytestring; sent verbatim (over TLS) to client
422
timeout: datetime.timedelta(); How long from last_checked_ok
423
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
425
runtime_expansions: Allowed attributes for runtime expansion.
426
expires: datetime.datetime(); time (UTC) when a client will be
427
disabled, or None
428
259
"""
429
260
430
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
433
"last_enabled", "name", "timeout")
434
client_defaults = { "timeout": "5m",
435
"extended_timeout": "15m",
436
"interval": "2m",
437
"checker": "fping -q -- %%(host)s",
438
"host": "",
439
"approval_delay": "0s",
440
"approval_duration": "1s",
441
"approved_by_default": "True",
442
"enabled": "True",
443
}
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))
444
267
445
268
def timeout_milliseconds(self):
446
269
"Return the 'timeout' attribute in milliseconds"
447
return timedelta_to_milliseconds(self.timeout)
448
449
def extended_timeout_milliseconds(self):
450
"Return the 'extended_timeout' attribute in milliseconds"
451
return timedelta_to_milliseconds(self.extended_timeout)
270
return self._timedelta_to_milliseconds(self.timeout)
452
271
453
272
def interval_milliseconds(self):
454
273
"Return the 'interval' attribute in milliseconds"
455
return timedelta_to_milliseconds(self.interval)
274
return self._timedelta_to_milliseconds(self.interval)
456
275
457
def approval_delay_milliseconds(self):
458
return timedelta_to_milliseconds(self.approval_delay)
459
460
@staticmethod
461
def config_parser(config):
462
""" Construct a new dict of client settings of this form:
463
{ client_name: {setting_name: value, ...}, ...}
464
with exceptions for any special settings as defined above"""
465
settings = {}
466
for client_name in config.sections():
467
section = dict(config.items(client_name))
468
client = settings[client_name] = {}
469
470
client["host"] = section["host"]
471
# Reformat values from string types to Python types
472
client["approved_by_default"] = config.getboolean(
473
client_name, "approved_by_default")
474
client["enabled"] = config.getboolean(client_name, "enabled")
475
476
client["fingerprint"] = (section["fingerprint"].upper()
477
.replace(" ", ""))
478
if "secret" in section:
479
client["secret"] = section["secret"].decode("base64")
480
elif "secfile" in section:
481
with open(os.path.expanduser(os.path.expandvars
482
(section["secfile"])),
483
"rb") as secfile:
484
client["secret"] = secfile.read()
485
else:
486
raise TypeError("No secret or secfile for section %s"
487
% section)
488
client["timeout"] = string_to_delta(section["timeout"])
489
client["extended_timeout"] = string_to_delta(
490
section["extended_timeout"])
491
client["interval"] = string_to_delta(section["interval"])
492
client["approval_delay"] = string_to_delta(
493
section["approval_delay"])
494
client["approval_duration"] = string_to_delta(
495
section["approval_duration"])
496
client["checker_command"] = section["checker"]
497
client["last_approval_request"] = None
498
client["last_checked_ok"] = None
499
client["last_checker_status"] = None
500
if client["enabled"]:
501
client["last_enabled"] = datetime.datetime.utcnow()
502
client["expires"] = (datetime.datetime.utcnow()
503
+ client["timeout"])
504
else:
505
client["last_enabled"] = None
506
client["expires"] = None
507
508
return settings
509
510
511
def __init__(self, settings, name = None):
276
def __init__(self, name = None, disable_hook=None, config=None):
512
277
"""Note: the 'checker' key in 'config' sets the
513
278
'checker_command' attribute and *not* the 'checker'
514
279
attribute."""
515
280
self.name = name
516
# adding all client settings
517
for setting, value in settings.iteritems():
518
setattr(self, setting, value)
519
520
logger.debug("Creating client %r", self.name)
281
if config is None:
282
config = {}
283
logger.debug(u"Creating client %r", self.name)
521
284
# Uppercase and remove spaces from fingerprint for later
522
285
# comparison purposes with return value from the fingerprint()
523
286
# function
524
logger.debug(" Fingerprint: %s", self.fingerprint)
525
self.created = settings.get("created", datetime.datetime.utcnow())
526
527
# attributes specific for this server instance
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
528
309
self.checker = None
529
310
self.checker_initiator_tag = None
530
311
self.disable_initiator_tag = None
531
312
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
532
314
self.current_checker_command = None
533
self.approved = None
534
self.approvals_pending = 0
535
self.changedstate = (multiprocessing_manager
536
.Condition(multiprocessing_manager
537
.Lock()))
538
self.client_structure = [attr for attr in
539
self.__dict__.iterkeys()
540
if not attr.startswith("_")]
541
self.client_structure.append("client_structure")
542
543
for name, t in inspect.getmembers(type(self),
544
lambda obj:
545
isinstance(obj,
546
property)):
547
if not name.startswith("_"):
548
self.client_structure.append(name)
549
550
# Send notice to process children that client state has changed
551
def send_changedstate(self):
552
with self.changedstate:
553
self.changedstate.notify_all()
315
self.last_connect = None
554
316
555
317
def enable(self):
556
318
"""Start this client's checker and timeout hooks"""
557
if getattr(self, "enabled", False):
319
if getattr(self, u"enabled", False):
558
320
# Already enabled
559
321
return
560
self.send_changedstate()
561
self.expires = datetime.datetime.utcnow() + self.timeout
562
self.enabled = True
563
322
self.last_enabled = datetime.datetime.utcnow()
564
self.init_checker()
565
566
def disable(self, quiet=True):
567
"""Disable this client."""
568
if not getattr(self, "enabled", False):
569
return False
570
if not quiet:
571
self.send_changedstate()
572
if not quiet:
573
logger.info("Disabling client %s", self.name)
574
if getattr(self, "disable_initiator_tag", False):
575
gobject.source_remove(self.disable_initiator_tag)
576
self.disable_initiator_tag = None
577
self.expires = None
578
if getattr(self, "checker_initiator_tag", False):
579
gobject.source_remove(self.checker_initiator_tag)
580
self.checker_initiator_tag = None
581
self.stop_checker()
582
self.enabled = False
583
# Do not run this again if called by a gobject.timeout_add
584
return False
585
586
def __del__(self):
587
self.disable()
588
589
def init_checker(self):
590
323
# Schedule a new checker to be started an 'interval' from now,
591
324
# and every interval from then on.
592
325
self.checker_initiator_tag = (gobject.timeout_add
596
329
self.disable_initiator_tag = (gobject.timeout_add
597
330
(self.timeout_milliseconds(),
598
331
self.disable))
332
self.enabled = True
599
333
# Also start a new checker *right now*.
600
334
self.start_checker()
601
335
336
def disable(self, log=True):
337
"""Disable this client."""
338
if not getattr(self, "enabled", False):
339
return False
340
if log:
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
602
359
def checker_callback(self, pid, condition, command):
603
360
"""The checker has completed, so take appropriate actions."""
604
361
self.checker_callback_tag = None
605
362
self.checker = None
606
363
if os.WIFEXITED(condition):
607
self.last_checker_status = os.WEXITSTATUS(condition)
608
if self.last_checker_status == 0:
609
logger.info("Checker for %(name)s succeeded",
364
exitstatus = os.WEXITSTATUS(condition)
365
if exitstatus == 0:
366
logger.info(u"Checker for %(name)s succeeded",
610
367
vars(self))
611
368
self.checked_ok()
612
369
else:
613
logger.info("Checker for %(name)s failed",
370
logger.info(u"Checker for %(name)s failed",
614
371
vars(self))
615
372
else:
616
self.last_checker_status = -1
617
logger.warning("Checker for %(name)s crashed?",
373
logger.warning(u"Checker for %(name)s crashed?",
618
374
vars(self))
619
375
620
def checked_ok(self, timeout=None):
376
def checked_ok(self):
621
377
"""Bump up the timeout for this client.
622
378
623
379
This should only be called when the client has been seen,
624
380
alive and well.
625
381
"""
626
if timeout is None:
627
timeout = self.timeout
628
382
self.last_checked_ok = datetime.datetime.utcnow()
629
if self.disable_initiator_tag is not None:
630
gobject.source_remove(self.disable_initiator_tag)
631
if getattr(self, "enabled", False):
632
self.disable_initiator_tag = (gobject.timeout_add
633
(timedelta_to_milliseconds
634
(timeout), self.disable))
635
self.expires = datetime.datetime.utcnow() + timeout
636
637
def need_approval(self):
638
self.last_approval_request = 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))
639
387
640
388
def start_checker(self):
641
389
"""Start a new checker subprocess if one is not running.
648
396
# client would inevitably timeout, since no checker would get
649
397
# a chance to run to completion. If we instead leave running
650
398
# checkers alone, the checker would have to take more time
651
# than 'timeout' for the client to be disabled, which is as it
652
# should be.
399
# than 'timeout' for the client to be declared invalid, which
400
# is as it should be.
653
401
654
402
# If a checker exists, make sure it is not a zombie
655
403
try:
656
404
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
657
except (AttributeError, OSError) as error:
405
except (AttributeError, OSError), error:
658
406
if (isinstance(error, OSError)
659
407
and error.errno != errno.ECHILD):
660
408
raise error
661
409
else:
662
410
if pid:
663
logger.warning("Checker was a zombie")
411
logger.warning(u"Checker was a zombie")
664
412
gobject.source_remove(self.checker_callback_tag)
665
413
self.checker_callback(pid, status,
666
414
self.current_checker_command)
671
419
command = self.checker_command % self.host
672
420
except TypeError:
673
421
# Escape attributes for the shell
674
escaped_attrs = dict(
675
(attr,
676
re.escape(unicode(str(getattr(self, attr, "")),
677
errors=
678
'replace')))
679
for attr in
680
self.runtime_expansions)
681
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())
682
428
try:
683
429
command = self.checker_command % escaped_attrs
684
except TypeError as error:
685
logger.error('Could not format string "%s":'
686
' %s', self.checker_command, error)
430
except TypeError, error:
431
logger.error(u'Could not format string "%s":'
432
u' %s', self.checker_command, error)
687
433
return True # Try again later
688
434
self.current_checker_command = command
689
435
try:
690
logger.info("Starting checker %r for %s",
436
logger.info(u"Starting checker %r for %s",
691
437
command, self.name)
692
438
# We don't need to redirect stdout and stderr, since
693
439
# in normal mode, that is already done by daemon(),
695
441
# always replaced by /dev/null.)
696
442
self.checker = subprocess.Popen(command,
697
443
close_fds=True,
698
shell=True, cwd="/")
444
shell=True, cwd=u"/")
699
445
self.checker_callback_tag = (gobject.child_watch_add
700
446
(self.checker.pid,
701
447
self.checker_callback,
706
452
if pid:
707
453
gobject.source_remove(self.checker_callback_tag)
708
454
self.checker_callback(pid, status, command)
709
except OSError as error:
710
logger.error("Failed to start subprocess: %s",
455
except OSError, error:
456
logger.error(u"Failed to start subprocess: %s",
711
457
error)
712
458
# Re-run this periodically if run by gobject.timeout_add
713
459
return True
717
463
if self.checker_callback_tag:
718
464
gobject.source_remove(self.checker_callback_tag)
719
465
self.checker_callback_tag = None
720
if getattr(self, "checker", None) is None:
466
if getattr(self, u"checker", None) is None:
721
467
return
722
logger.debug("Stopping checker for %(name)s", vars(self))
468
logger.debug(u"Stopping checker for %(name)s", vars(self))
723
469
try:
724
470
os.kill(self.checker.pid, signal.SIGTERM)
725
471
#time.sleep(0.5)
726
472
#if self.checker.poll() is None:
727
473
# os.kill(self.checker.pid, signal.SIGKILL)
728
except OSError as error:
474
except OSError, error:
729
475
if error.errno != errno.ESRCH: # No such process
730
476
raise
731
477
self.checker = None
732
733
734
def dbus_service_property(dbus_interface, signature="v",
735
access="readwrite", byte_arrays=False):
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):
736
492
"""Decorators for marking methods of a DBusObjectWithProperties to
737
493
become properties on the D-Bus.
738
494
743
499
dbus.service.method, except there is only "signature", since the
744
500
type from Get() and the type sent to Set() is the same.
745
501
"""
746
# Encoding deeply encoded byte arrays is not supported yet by the
747
# "Set" method, so we fail early here:
748
if byte_arrays and signature != "ay":
749
raise ValueError("Byte arrays not supported for non-'ay'"
750
" signature %r" % signature)
751
502
def decorator(func):
752
503
func._dbus_is_property = True
753
504
func._dbus_interface = dbus_interface
754
505
func._dbus_signature = signature
755
506
func._dbus_access = access
756
507
func._dbus_name = func.__name__
757
if func._dbus_name.endswith("_dbus_property"):
508
if func._dbus_name.endswith(u"_dbus_property"):
758
509
func._dbus_name = func._dbus_name[:-14]
759
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
510
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
760
511
return func
761
512
return decorator
762
513
782
533
783
534
class DBusObjectWithProperties(dbus.service.Object):
784
535
"""A D-Bus object with properties.
785
536
786
537
Classes inheriting from this can use the dbus_service_property
787
538
decorator to expose methods as D-Bus properties. It exposes the
788
539
standard Get(), Set(), and GetAll() methods on the D-Bus.
790
541
791
542
@staticmethod
792
543
def _is_dbus_property(obj):
793
return getattr(obj, "_dbus_is_property", False)
544
return getattr(obj, u"_dbus_is_property", False)
794
545
795
546
def _get_all_dbus_properties(self):
796
547
"""Returns a generator of (name, attribute) pairs
797
548
"""
798
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
799
for cls in self.__class__.__mro__
549
return ((prop._dbus_name, prop)
800
550
for name, prop in
801
inspect.getmembers(cls, self._is_dbus_property))
551
inspect.getmembers(self, self._is_dbus_property))
802
552
803
553
def _get_dbus_property(self, interface_name, property_name):
804
554
"""Returns a bound method if one exists which is a D-Bus
805
555
property with the specified name and interface.
806
556
"""
807
for cls in self.__class__.__mro__:
808
for name, value in (inspect.getmembers
809
(cls, self._is_dbus_property)):
810
if (value._dbus_name == property_name
811
and value._dbus_interface == interface_name):
812
return value.__get__(self)
813
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
814
567
# No such property
815
raise DBusPropertyNotFound(self.dbus_object_path + ":"
816
+ interface_name + "."
568
raise DBusPropertyNotFound(self.dbus_object_path + u":"
569
+ interface_name + u"."
817
570
+ property_name)
818
571
819
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
820
out_signature="v")
572
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
573
out_signature=u"v")
821
574
def Get(self, interface_name, property_name):
822
575
"""Standard D-Bus property Get() method, see D-Bus standard.
823
576
"""
824
577
prop = self._get_dbus_property(interface_name, property_name)
825
if prop._dbus_access == "write":
578
if prop._dbus_access == u"write":
826
579
raise DBusPropertyAccessException(property_name)
827
580
value = prop()
828
if not hasattr(value, "variant_level"):
581
if not hasattr(value, u"variant_level"):
829
582
return value
830
583
return type(value)(value, variant_level=value.variant_level+1)
831
584
832
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
585
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
833
586
def Set(self, interface_name, property_name, value):
834
587
"""Standard D-Bus property Set() method, see D-Bus standard.
835
588
"""
836
589
prop = self._get_dbus_property(interface_name, property_name)
837
if prop._dbus_access == "read":
590
if prop._dbus_access == u"read":
838
591
raise DBusPropertyAccessException(property_name)
839
if prop._dbus_get_args_options["byte_arrays"]:
840
# The byte_arrays option is not supported yet on
841
# signatures other than "ay".
842
if prop._dbus_signature != "ay":
843
raise ValueError
592
if prop._dbus_get_args_options[u"byte_arrays"]:
844
593
value = dbus.ByteArray(''.join(unichr(byte)
845
594
for byte in value))
846
595
prop(value)
847
596
848
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
849
out_signature="a{sv}")
597
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
598
out_signature=u"a{sv}")
850
599
def GetAll(self, interface_name):
851
600
"""Standard D-Bus property GetAll() method, see D-Bus
852
601
standard.
853
602
854
603
Note: Will not include properties with access="write".
855
604
"""
856
properties = {}
605
all = {}
857
606
for name, prop in self._get_all_dbus_properties():
858
607
if (interface_name
859
608
and interface_name != prop._dbus_interface):
860
609
# Interface non-empty but did not match
861
610
continue
862
611
# Ignore write-only properties
863
if prop._dbus_access == "write":
612
if prop._dbus_access == u"write":
864
613
continue
865
614
value = prop()
866
if not hasattr(value, "variant_level"):
867
properties[name] = value
615
if not hasattr(value, u"variant_level"):
616
all[name] = value
868
617
continue
869
properties[name] = type(value)(value, variant_level=
870
value.variant_level+1)
871
return dbus.Dictionary(properties, signature="sv")
618
all[name] = type(value)(value, variant_level=
619
value.variant_level+1)
620
return dbus.Dictionary(all, signature=u"sv")
872
621
873
622
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
874
out_signature="s",
623
out_signature=u"s",
875
624
path_keyword='object_path',
876
625
connection_keyword='connection')
877
626
def Introspect(self, object_path, connection):
882
631
try:
883
632
document = xml.dom.minidom.parseString(xmlstring)
884
633
def make_tag(document, name, prop):
885
e = document.createElement("property")
886
e.setAttribute("name", name)
887
e.setAttribute("type", prop._dbus_signature)
888
e.setAttribute("access", prop._dbus_access)
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)
889
638
return e
890
for if_tag in document.getElementsByTagName("interface"):
639
for if_tag in document.getElementsByTagName(u"interface"):
891
640
for tag in (make_tag(document, name, prop)
892
641
for name, prop
893
642
in self._get_all_dbus_properties()
894
643
if prop._dbus_interface
895
== if_tag.getAttribute("name")):
644
== if_tag.getAttribute(u"name")):
896
645
if_tag.appendChild(tag)
897
646
# Add the names to the return values for the
898
647
# "org.freedesktop.DBus.Properties" methods
899
if (if_tag.getAttribute("name")
900
== "org.freedesktop.DBus.Properties"):
901
for cn in if_tag.getElementsByTagName("method"):
902
if cn.getAttribute("name") == "Get":
903
for arg in cn.getElementsByTagName("arg"):
904
if (arg.getAttribute("direction")
905
== "out"):
906
arg.setAttribute("name", "value")
907
elif cn.getAttribute("name") == "GetAll":
908
for arg in cn.getElementsByTagName("arg"):
909
if (arg.getAttribute("direction")
910
== "out"):
911
arg.setAttribute("name", "props")
912
xmlstring = document.toxml("utf-8")
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")
913
662
document.unlink()
914
663
except (AttributeError, xml.dom.DOMException,
915
xml.parsers.expat.ExpatError) as error:
916
logger.error("Failed to override Introspection method",
664
xml.parsers.expat.ExpatError), error:
665
logger.error(u"Failed to override Introspection method",
917
666
error)
918
667
return xmlstring
919
668
920
669
921
def datetime_to_dbus (dt, variant_level=0):
922
"""Convert a UTC datetime.datetime() to a D-Bus type."""
923
if dt is None:
924
return dbus.String("", variant_level = variant_level)
925
return dbus.String(dt.isoformat(),
926
variant_level=variant_level)
927
928
929
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
930
.__metaclass__):
931
"""Applied to an empty subclass of a D-Bus object, this metaclass
932
will add additional D-Bus attributes matching a certain pattern.
933
"""
934
def __new__(mcs, name, bases, attr):
935
# Go through all the base classes which could have D-Bus
936
# methods, signals, or properties in them
937
for base in (b for b in bases
938
if issubclass(b, dbus.service.Object)):
939
# Go though all attributes of the base class
940
for attrname, attribute in inspect.getmembers(base):
941
# Ignore non-D-Bus attributes, and D-Bus attributes
942
# with the wrong interface name
943
if (not hasattr(attribute, "_dbus_interface")
944
or not attribute._dbus_interface
945
.startswith("se.recompile.Mandos")):
946
continue
947
# Create an alternate D-Bus interface name based on
948
# the current name
949
alt_interface = (attribute._dbus_interface
950
.replace("se.recompile.Mandos",
951
"se.bsnet.fukt.Mandos"))
952
# Is this a D-Bus signal?
953
if getattr(attribute, "_dbus_is_signal", False):
954
# Extract the original non-method function by
955
# black magic
956
nonmethod_func = (dict(
957
zip(attribute.func_code.co_freevars,
958
attribute.__closure__))["func"]
959
.cell_contents)
960
# Create a new, but exactly alike, function
961
# object, and decorate it to be a new D-Bus signal
962
# with the alternate D-Bus interface name
963
new_function = (dbus.service.signal
964
(alt_interface,
965
attribute._dbus_signature)
966
(types.FunctionType(
967
nonmethod_func.func_code,
968
nonmethod_func.func_globals,
969
nonmethod_func.func_name,
970
nonmethod_func.func_defaults,
971
nonmethod_func.func_closure)))
972
# Define a creator of a function to call both the
973
# old and new functions, so both the old and new
974
# signals gets sent when the function is called
975
def fixscope(func1, func2):
976
"""This function is a scope container to pass
977
func1 and func2 to the "call_both" function
978
outside of its arguments"""
979
def call_both(*args, **kwargs):
980
"""This function will emit two D-Bus
981
signals by calling func1 and func2"""
982
func1(*args, **kwargs)
983
func2(*args, **kwargs)
984
return call_both
985
# Create the "call_both" function and add it to
986
# the class
987
attr[attrname] = fixscope(attribute,
988
new_function)
989
# Is this a D-Bus method?
990
elif getattr(attribute, "_dbus_is_method", False):
991
# Create a new, but exactly alike, function
992
# object. Decorate it to be a new D-Bus method
993
# with the alternate D-Bus interface name. Add it
994
# to the class.
995
attr[attrname] = (dbus.service.method
996
(alt_interface,
997
attribute._dbus_in_signature,
998
attribute._dbus_out_signature)
999
(types.FunctionType
1000
(attribute.func_code,
1001
attribute.func_globals,
1002
attribute.func_name,
1003
attribute.func_defaults,
1004
attribute.func_closure)))
1005
# Is this a D-Bus property?
1006
elif getattr(attribute, "_dbus_is_property", False):
1007
# Create a new, but exactly alike, function
1008
# object, and decorate it to be a new D-Bus
1009
# property with the alternate D-Bus interface
1010
# name. Add it to the class.
1011
attr[attrname] = (dbus_service_property
1012
(alt_interface,
1013
attribute._dbus_signature,
1014
attribute._dbus_access,
1015
attribute
1016
._dbus_get_args_options
1017
["byte_arrays"])
1018
(types.FunctionType
1019
(attribute.func_code,
1020
attribute.func_globals,
1021
attribute.func_name,
1022
attribute.func_defaults,
1023
attribute.func_closure)))
1024
return type.__new__(mcs, name, bases, attr)
1025
1026
1027
670
class ClientDBus(Client, DBusObjectWithProperties):
1028
671
"""A Client class using D-Bus
1029
672
1031
674
dbus_object_path: dbus.ObjectPath
1032
675
bus: dbus.SystemBus()
1033
676
"""
1034
1035
runtime_expansions = (Client.runtime_expansions
1036
+ ("dbus_object_path",))
1037
1038
677
# dbus.service.Object doesn't use super(), so we can't either.
1039
678
1040
679
def __init__(self, bus = None, *args, **kwargs):
1041
680
self.bus = bus
1042
681
Client.__init__(self, *args, **kwargs)
1043
self._approvals_pending = 0
1044
1045
self._approvals_pending = 0
1046
682
# Only now, when this client is initialized, can it show up on
1047
683
# the D-Bus
1048
client_object_name = unicode(self.name).translate(
1049
{ord("."): ord("_"),
1050
ord("-"): ord("_")})
1051
684
self.dbus_object_path = (dbus.ObjectPath
1052
("/clients/" + client_object_name))
685
(u"/clients/"
686
+ self.name.replace(u".", u"_")))
1053
687
DBusObjectWithProperties.__init__(self, self.bus,
1054
688
self.dbus_object_path)
1055
1056
def notifychangeproperty(transform_func,
1057
dbus_name, type_func=lambda x: x,
1058
variant_level=1):
1059
""" Modify a variable so that it's a property which announces
1060
its changes to DBus.
1061
1062
transform_fun: Function that takes a value and a variant_level
1063
and transforms it to a D-Bus type.
1064
dbus_name: D-Bus name of the variable
1065
type_func: Function that transform the value before sending it
1066
to the D-Bus. Default: no transform
1067
variant_level: D-Bus variant level. Default: 1
1068
"""
1069
attrname = "_{0}".format(dbus_name)
1070
def setter(self, value):
1071
if hasattr(self, "dbus_object_path"):
1072
if (not hasattr(self, attrname) or
1073
type_func(getattr(self, attrname, None))
1074
!= type_func(value)):
1075
dbus_value = transform_func(type_func(value),
1076
variant_level
1077
=variant_level)
1078
self.PropertyChanged(dbus.String(dbus_name),
1079
dbus_value)
1080
setattr(self, attrname, value)
1081
1082
return property(lambda self: getattr(self, attrname), setter)
1083
1084
1085
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1086
approvals_pending = notifychangeproperty(dbus.Boolean,
1087
"ApprovalPending",
1088
type_func = bool)
1089
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1090
last_enabled = notifychangeproperty(datetime_to_dbus,
1091
"LastEnabled")
1092
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1093
type_func = lambda checker:
1094
checker is not None)
1095
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1096
"LastCheckedOK")
1097
last_approval_request = notifychangeproperty(
1098
datetime_to_dbus, "LastApprovalRequest")
1099
approved_by_default = notifychangeproperty(dbus.Boolean,
1100
"ApprovedByDefault")
1101
approval_delay = notifychangeproperty(dbus.UInt64,
1102
"ApprovalDelay",
1103
type_func =
1104
timedelta_to_milliseconds)
1105
approval_duration = notifychangeproperty(
1106
dbus.UInt64, "ApprovalDuration",
1107
type_func = timedelta_to_milliseconds)
1108
host = notifychangeproperty(dbus.String, "Host")
1109
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1110
type_func =
1111
timedelta_to_milliseconds)
1112
extended_timeout = notifychangeproperty(
1113
dbus.UInt64, "ExtendedTimeout",
1114
type_func = timedelta_to_milliseconds)
1115
interval = notifychangeproperty(dbus.UInt64,
1116
"Interval",
1117
type_func =
1118
timedelta_to_milliseconds)
1119
checker_command = notifychangeproperty(dbus.String, "Checker")
1120
1121
del notifychangeproperty
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, signal = True):
710
oldstate = getattr(self, u"enabled", False)
711
r = Client.disable(self, log=signal)
712
if signal 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
1122
717
1123
718
def __del__(self, *args, **kwargs):
1124
719
try:
1125
720
self.remove_from_connection()
1126
721
except LookupError:
1127
722
pass
1128
if hasattr(DBusObjectWithProperties, "__del__"):
723
if hasattr(DBusObjectWithProperties, u"__del__"):
1129
724
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1130
725
Client.__del__(self, *args, **kwargs)
1131
726
1133
728
*args, **kwargs):
1134
729
self.checker_callback_tag = None
1135
730
self.checker = None
731
# Emit D-Bus signal
732
self.PropertyChanged(dbus.String(u"checker_running"),
733
dbus.Boolean(False, variant_level=1))
1136
734
if os.WIFEXITED(condition):
1137
735
exitstatus = os.WEXITSTATUS(condition)
1138
736
# Emit D-Bus signal
1148
746
return Client.checker_callback(self, pid, condition, command,
1149
747
*args, **kwargs)
1150
748
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
1151
758
def start_checker(self, *args, **kwargs):
1152
759
old_checker = self.checker
1153
760
if self.checker is not None:
1160
767
and old_checker_pid != self.checker.pid):
1161
768
# Emit D-Bus signal
1162
769
self.CheckerStarted(self.current_checker_command)
1163
return r
1164
1165
def _reset_approved(self):
1166
self.approved = None
1167
return False
1168
1169
def approve(self, value=True):
1170
self.send_changedstate()
1171
self.approved = value
1172
gobject.timeout_add(timedelta_to_milliseconds
1173
(self.approval_duration),
1174
self._reset_approved)
1175
1176
1177
## D-Bus methods, signals & properties
1178
_interface = "se.recompile.Mandos.Client"
1179
1180
## Signals
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()
1181
791
1182
792
# CheckerCompleted - signal
1183
@dbus.service.signal(_interface, signature="nxs")
793
@dbus.service.signal(_interface, signature=u"nxs")
1184
794
def CheckerCompleted(self, exitcode, waitstatus, command):
1185
795
"D-Bus signal"
1186
796
pass
1187
797
1188
798
# CheckerStarted - signal
1189
@dbus.service.signal(_interface, signature="s")
799
@dbus.service.signal(_interface, signature=u"s")
1190
800
def CheckerStarted(self, command):
1191
801
"D-Bus signal"
1192
802
pass
1193
803
1194
804
# PropertyChanged - signal
1195
@dbus.service.signal(_interface, signature="sv")
805
@dbus.service.signal(_interface, signature=u"sv")
1196
806
def PropertyChanged(self, property, value):
1197
807
"D-Bus signal"
1198
808
pass
1200
810
# GotSecret - signal
1201
811
@dbus.service.signal(_interface)
1202
812
def GotSecret(self):
1203
"""D-Bus signal
1204
Is sent after a successful transfer of secret from the Mandos
1205
server to mandos-client
1206
"""
813
"D-Bus signal"
1207
814
pass
1208
815
1209
816
# Rejected - signal
1210
@dbus.service.signal(_interface, signature="s")
1211
def Rejected(self, reason):
1212
"D-Bus signal"
1213
pass
1214
1215
# NeedApproval - signal
1216
@dbus.service.signal(_interface, signature="tb")
1217
def NeedApproval(self, timeout, default):
1218
"D-Bus signal"
1219
return self.need_approval()
1220
1221
# NeRwequest - signal
1222
@dbus.service.signal(_interface, signature="s")
1223
def NewRequest(self, ip):
1224
"""D-Bus signal
1225
Is sent after a client request a password.
1226
"""
1227
pass
1228
1229
## Methods
1230
1231
# Approve - method
1232
@dbus.service.method(_interface, in_signature="b")
1233
def Approve(self, value):
1234
self.approve(value)
1235
1236
# CheckedOK - method
1237
@dbus.service.method(_interface)
1238
def CheckedOK(self):
1239
self.checked_ok()
817
@dbus.service.signal(_interface)
818
def Rejected(self):
819
"D-Bus signal"
820
pass
1240
821
1241
822
# Enable - method
1242
823
@dbus.service.method(_interface)
1261
842
def StopChecker(self):
1262
843
self.stop_checker()
1263
844
1264
## Properties
1265
1266
# ApprovalPending - property
1267
@dbus_service_property(_interface, signature="b", access="read")
1268
def ApprovalPending_dbus_property(self):
1269
return dbus.Boolean(bool(self.approvals_pending))
1270
1271
# ApprovedByDefault - property
1272
@dbus_service_property(_interface, signature="b",
1273
access="readwrite")
1274
def ApprovedByDefault_dbus_property(self, value=None):
1275
if value is None: # get
1276
return dbus.Boolean(self.approved_by_default)
1277
self.approved_by_default = bool(value)
1278
1279
# ApprovalDelay - property
1280
@dbus_service_property(_interface, signature="t",
1281
access="readwrite")
1282
def ApprovalDelay_dbus_property(self, value=None):
1283
if value is None: # get
1284
return dbus.UInt64(self.approval_delay_milliseconds())
1285
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1286
1287
# ApprovalDuration - property
1288
@dbus_service_property(_interface, signature="t",
1289
access="readwrite")
1290
def ApprovalDuration_dbus_property(self, value=None):
1291
if value is None: # get
1292
return dbus.UInt64(timedelta_to_milliseconds(
1293
self.approval_duration))
1294
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1295
1296
# Name - property
1297
@dbus_service_property(_interface, signature="s", access="read")
1298
def Name_dbus_property(self):
845
# name - property
846
@dbus_service_property(_interface, signature=u"s", access=u"read")
847
def name_dbus_property(self):
1299
848
return dbus.String(self.name)
1300
849
1301
# Fingerprint - property
1302
@dbus_service_property(_interface, signature="s", access="read")
1303
def Fingerprint_dbus_property(self):
850
# fingerprint - property
851
@dbus_service_property(_interface, signature=u"s", access=u"read")
852
def fingerprint_dbus_property(self):
1304
853
return dbus.String(self.fingerprint)
1305
854
1306
# Host - property
1307
@dbus_service_property(_interface, signature="s",
1308
access="readwrite")
1309
def Host_dbus_property(self, value=None):
855
# host - property
856
@dbus_service_property(_interface, signature=u"s",
857
access=u"readwrite")
858
def host_dbus_property(self, value=None):
1310
859
if value is None: # get
1311
860
return dbus.String(self.host)
1312
self.host = unicode(value)
1313
1314
# Created - property
1315
@dbus_service_property(_interface, signature="s", access="read")
1316
def Created_dbus_property(self):
1317
return datetime_to_dbus(self.created)
1318
1319
# LastEnabled - property
1320
@dbus_service_property(_interface, signature="s", access="read")
1321
def LastEnabled_dbus_property(self):
1322
return datetime_to_dbus(self.last_enabled)
1323
1324
# Enabled - property
1325
@dbus_service_property(_interface, signature="b",
1326
access="readwrite")
1327
def Enabled_dbus_property(self, value=None):
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):
1328
882
if value is None: # get
1329
883
return dbus.Boolean(self.enabled)
1330
884
if value:
1332
886
else:
1333
887
self.disable()
1334
888
1335
# LastCheckedOK - property
1336
@dbus_service_property(_interface, signature="s",
1337
access="readwrite")
1338
def LastCheckedOK_dbus_property(self, value=None):
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):
1339
893
if value is not None:
1340
894
self.checked_ok()
1341
895
return
1342
return datetime_to_dbus(self.last_checked_ok)
1343
1344
# Expires - property
1345
@dbus_service_property(_interface, signature="s", access="read")
1346
def Expires_dbus_property(self):
1347
return datetime_to_dbus(self.expires)
1348
1349
# LastApprovalRequest - property
1350
@dbus_service_property(_interface, signature="s", access="read")
1351
def LastApprovalRequest_dbus_property(self):
1352
return datetime_to_dbus(self.last_approval_request)
1353
1354
# Timeout - property
1355
@dbus_service_property(_interface, signature="t",
1356
access="readwrite")
1357
def Timeout_dbus_property(self, value=None):
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):
1358
905
if value is None: # get
1359
906
return dbus.UInt64(self.timeout_milliseconds())
1360
907
self.timeout = datetime.timedelta(0, 0, 0, value)
1361
if getattr(self, "disable_initiator_tag", None) is None:
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:
1362
912
return
1363
913
# Reschedule timeout
1364
914
gobject.source_remove(self.disable_initiator_tag)
1365
915
self.disable_initiator_tag = None
1366
self.expires = None
1367
time_to_die = timedelta_to_milliseconds((self
1368
.last_checked_ok
1369
+ self.timeout)
1370
- datetime.datetime
1371
.utcnow())
916
time_to_die = (self.
917
_timedelta_to_milliseconds((self
918
.last_checked_ok
919
+ self.timeout)
920
- datetime.datetime
921
.utcnow()))
1372
922
if time_to_die <= 0:
1373
923
# The timeout has passed
1374
924
self.disable()
1375
925
else:
1376
self.expires = (datetime.datetime.utcnow()
1377
+ datetime.timedelta(milliseconds =
1378
time_to_die))
1379
926
self.disable_initiator_tag = (gobject.timeout_add
1380
927
(time_to_die, self.disable))
1381
928
1382
# ExtendedTimeout - property
1383
@dbus_service_property(_interface, signature="t",
1384
access="readwrite")
1385
def ExtendedTimeout_dbus_property(self, value=None):
1386
if value is None: # get
1387
return dbus.UInt64(self.extended_timeout_milliseconds())
1388
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1389
1390
# Interval - property
1391
@dbus_service_property(_interface, signature="t",
1392
access="readwrite")
1393
def Interval_dbus_property(self, value=None):
929
# interval - property
930
@dbus_service_property(_interface, signature=u"t",
931
access=u"readwrite")
932
def interval_dbus_property(self, value=None):
1394
933
if value is None: # get
1395
934
return dbus.UInt64(self.interval_milliseconds())
1396
935
self.interval = datetime.timedelta(0, 0, 0, value)
1397
if getattr(self, "checker_initiator_tag", None) is None:
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:
1398
940
return
1399
if self.enabled:
1400
# Reschedule checker run
1401
gobject.source_remove(self.checker_initiator_tag)
1402
self.checker_initiator_tag = (gobject.timeout_add
1403
(value, self.start_checker))
1404
self.start_checker() # Start one now, too
1405
1406
# Checker - property
1407
@dbus_service_property(_interface, signature="s",
1408
access="readwrite")
1409
def Checker_dbus_property(self, value=None):
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):
1410
951
if value is None: # get
1411
952
return dbus.String(self.checker_command)
1412
self.checker_command = unicode(value)
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))
1413
958
1414
# CheckerRunning - property
1415
@dbus_service_property(_interface, signature="b",
1416
access="readwrite")
1417
def CheckerRunning_dbus_property(self, value=None):
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):
1418
963
if value is None: # get
1419
964
return dbus.Boolean(self.checker is not None)
1420
965
if value:
1422
967
else:
1423
968
self.stop_checker()
1424
969
1425
# ObjectPath - property
1426
@dbus_service_property(_interface, signature="o", access="read")
1427
def ObjectPath_dbus_property(self):
970
# object_path - property
971
@dbus_service_property(_interface, signature=u"o", access=u"read")
972
def object_path_dbus_property(self):
1428
973
return self.dbus_object_path # is already a dbus.ObjectPath
1429
974
1430
# Secret = property
1431
@dbus_service_property(_interface, signature="ay",
1432
access="write", byte_arrays=True)
1433
def Secret_dbus_property(self, value):
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):
1434
979
self.secret = str(value)
1435
980
1436
981
del _interface
1437
982
1438
983
1439
class ProxyClient(object):
1440
def __init__(self, child_pipe, fpr, address):
1441
self._pipe = child_pipe
1442
self._pipe.send(('init', fpr, address))
1443
if not self._pipe.recv():
1444
raise KeyError()
1445
1446
def __getattribute__(self, name):
1447
if name == '_pipe':
1448
return super(ProxyClient, self).__getattribute__(name)
1449
self._pipe.send(('getattr', name))
1450
data = self._pipe.recv()
1451
if data[0] == 'data':
1452
return data[1]
1453
if data[0] == 'function':
1454
def func(*args, **kwargs):
1455
self._pipe.send(('funcall', name, args, kwargs))
1456
return self._pipe.recv()[1]
1457
return func
1458
1459
def __setattr__(self, name, value):
1460
if name == '_pipe':
1461
return super(ProxyClient, self).__setattr__(name, value)
1462
self._pipe.send(('setattr', name, value))
1463
1464
1465
class ClientDBusTransitional(ClientDBus):
1466
__metaclass__ = AlternateDBusNamesMetaclass
1467
1468
1469
984
class ClientHandler(socketserver.BaseRequestHandler, object):
1470
985
"""A class to handle client connections.
1471
986
1473
988
Note: This will run in its own forked process."""
1474
989
1475
990
def handle(self):
1476
with contextlib.closing(self.server.child_pipe) as child_pipe:
1477
logger.info("TCP connection from: %s",
1478
unicode(self.client_address))
1479
logger.debug("Pipe FD: %d",
1480
self.server.child_pipe.fileno())
1481
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:
1482
996
session = (gnutls.connection
1483
997
.ClientSession(self.request,
1484
998
gnutls.connection
1485
999
.X509Credentials()))
1486
1000
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
1487
1010
# Note: gnutls.connection.X509Credentials is really a
1488
1011
# generic GnuTLS certificate credentials object so long as
1489
1012
# no X.509 keys are added to it. Therefore, we can use it
1490
1013
# here despite using OpenPGP certificates.
1491
1014
1492
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1493
# "+AES-256-CBC", "+SHA1",
1494
# "+COMP-NULL", "+CTYPE-OPENPGP",
1495
# "+DHE-DSS"))
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"))
1496
1019
# Use a fallback default, since this MUST be set.
1497
1020
priority = self.server.gnutls_priority
1498
1021
if priority is None:
1499
priority = "NORMAL"
1022
priority = u"NORMAL"
1500
1023
(gnutls.library.functions
1501
1024
.gnutls_priority_set_direct(session._c_object,
1502
1025
priority, None))
1503
1026
1504
# Start communication using the Mandos protocol
1505
# Get protocol number
1506
line = self.request.makefile().readline()
1507
logger.debug("Protocol version: %r", line)
1508
try:
1509
if int(line.strip().split()[0]) > 1:
1510
raise RuntimeError
1511
except (ValueError, IndexError, RuntimeError) as error:
1512
logger.error("Unknown protocol version: %s", error)
1513
return
1514
1515
# Start GnuTLS connection
1516
1027
try:
1517
1028
session.handshake()
1518
except gnutls.errors.GNUTLSError as error:
1519
logger.warning("Handshake failed: %s", error)
1029
except gnutls.errors.GNUTLSError, error:
1030
logger.warning(u"Handshake failed: %s", error)
1520
1031
# Do not run session.bye() here: the session is not
1521
1032
# established. Just abandon the request.
1522
1033
return
1523
logger.debug("Handshake succeeded")
1524
1525
approval_required = False
1034
logger.debug(u"Handshake succeeded")
1526
1035
try:
1527
try:
1528
fpr = self.fingerprint(self.peer_certificate
1529
(session))
1530
except (TypeError,
1531
gnutls.errors.GNUTLSError) as error:
1532
logger.warning("Bad certificate: %s", error)
1533
return
1534
logger.debug("Fingerprint: %s", fpr)
1535
1536
try:
1537
client = ProxyClient(child_pipe, fpr,
1538
self.client_address)
1539
except KeyError:
1540
return
1541
1542
if self.server.use_dbus:
1543
# Emit D-Bus signal
1544
client.NewRequest(str(self.client_address))
1545
1546
if client.approval_delay:
1547
delay = client.approval_delay
1548
client.approvals_pending += 1
1549
approval_required = True
1550
1551
while True:
1552
if not client.enabled:
1553
logger.info("Client %s is disabled",
1554
client.name)
1555
if self.server.use_dbus:
1556
# Emit D-Bus signal
1557
client.Rejected("Disabled")
1558
return
1559
1560
if client.approved or not client.approval_delay:
1561
#We are approved or approval is disabled
1562
break
1563
elif client.approved is None:
1564
logger.info("Client %s needs approval",
1565
client.name)
1566
if self.server.use_dbus:
1567
# Emit D-Bus signal
1568
client.NeedApproval(
1569
client.approval_delay_milliseconds(),
1570
client.approved_by_default)
1571
else:
1572
logger.warning("Client %s was not approved",
1573
client.name)
1574
if self.server.use_dbus:
1575
# Emit D-Bus signal
1576
client.Rejected("Denied")
1577
return
1578
1579
#wait until timeout or approved
1580
time = datetime.datetime.now()
1581
client.changedstate.acquire()
1582
(client.changedstate.wait
1583
(float(client.timedelta_to_milliseconds(delay)
1584
/ 1000)))
1585
client.changedstate.release()
1586
time2 = datetime.datetime.now()
1587
if (time2 - time) >= delay:
1588
if not client.approved_by_default:
1589
logger.warning("Client %s timed out while"
1590
" waiting for approval",
1591
client.name)
1592
if self.server.use_dbus:
1593
# Emit D-Bus signal
1594
client.Rejected("Approval timed out")
1595
return
1596
else:
1597
break
1598
else:
1599
delay -= time2 - time
1600
1601
sent_size = 0
1602
while sent_size < len(client.secret):
1603
try:
1604
sent = session.send(client.secret[sent_size:])
1605
except gnutls.errors.GNUTLSError as error:
1606
logger.warning("gnutls send failed")
1607
return
1608
logger.debug("Sent: %d, remaining: %d",
1609
sent, len(client.secret)
1610
- (sent_size + sent))
1611
sent_size += sent
1612
1613
logger.info("Sending secret to %s", client.name)
1614
# bump the timeout using extended_timeout
1615
client.checked_ok(client.extended_timeout)
1616
if self.server.use_dbus:
1617
# Emit D-Bus signal
1618
client.GotSecret()
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)
1619
1042
1620
finally:
1621
if approval_required:
1622
client.approvals_pending -= 1
1623
try:
1624
session.bye()
1625
except gnutls.errors.GNUTLSError as error:
1626
logger.warning("GnuTLS bye failed")
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()
1627
1068
1628
1069
@staticmethod
1629
1070
def peer_certificate(session):
1639
1080
.gnutls_certificate_get_peers
1640
1081
(session._c_object, ctypes.byref(list_size)))
1641
1082
if not bool(cert_list) and list_size.value != 0:
1642
raise gnutls.errors.GNUTLSError("error getting peer"
1643
" certificate")
1083
raise gnutls.errors.GNUTLSError(u"error getting peer"
1084
u" certificate")
1644
1085
if list_size.value == 0:
1645
1086
return None
1646
1087
cert = cert_list[0]
1672
1113
if crtverify.value != 0:
1673
1114
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1674
1115
raise (gnutls.errors.CertificateSecurityError
1675
("Verify failed"))
1116
(u"Verify failed"))
1676
1117
# New buffer for the fingerprint
1677
1118
buf = ctypes.create_string_buffer(20)
1678
1119
buf_len = ctypes.c_size_t()
1685
1126
# Convert the buffer to a Python bytestring
1686
1127
fpr = ctypes.string_at(buf, buf_len.value)
1687
1128
# Convert the bytestring to hexadecimal notation
1688
hex_fpr = binascii.hexlify(fpr).upper()
1129
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1689
1130
return hex_fpr
1690
1131
1691
1132
1692
class MultiprocessingMixIn(object):
1693
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1694
def sub_process_main(self, request, address):
1695
try:
1696
self.finish_request(request, address)
1697
except Exception:
1698
self.handle_error(request, address)
1699
self.close_request(request)
1700
1701
def process_request(self, request, address):
1702
"""Start a new process to process the request."""
1703
proc = multiprocessing.Process(target = self.sub_process_main,
1704
args = (request,
1705
address))
1706
proc.start()
1707
return proc
1708
1709
1710
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1711
""" adds a pipe to the MixIn """
1133
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1134
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1712
1135
def process_request(self, request, client_address):
1713
1136
"""Overrides and wraps the original process_request().
1714
1137
1715
1138
This function creates a new pipe in self.pipe
1716
1139
"""
1717
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1718
1719
proc = MultiprocessingMixIn.process_request(self, request,
1720
client_address)
1721
self.child_pipe.close()
1722
self.add_pipe(parent_pipe, proc)
1723
1724
def add_pipe(self, parent_pipe, proc):
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):
1725
1146
"""Dummy function; override as necessary"""
1726
raise NotImplementedError
1727
1728
1729
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1147
os.close(pipe)
1148
1149
1150
class IPv6_TCPServer(ForkingMixInWithPipe,
1730
1151
socketserver.TCPServer, object):
1731
1152
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1732
1153
1748
1169
bind to an address or port if they were not specified."""
1749
1170
if self.interface is not None:
1750
1171
if SO_BINDTODEVICE is None:
1751
logger.error("SO_BINDTODEVICE does not exist;"
1752
" cannot bind to interface %s",
1172
logger.error(u"SO_BINDTODEVICE does not exist;"
1173
u" cannot bind to interface %s",
1753
1174
self.interface)
1754
1175
else:
1755
1176
try:
1756
1177
self.socket.setsockopt(socket.SOL_SOCKET,
1757
1178
SO_BINDTODEVICE,
1758
1179
str(self.interface
1759
+ '\0'))
1760
except socket.error as error:
1180
+ u'\0'))
1181
except socket.error, error:
1761
1182
if error[0] == errno.EPERM:
1762
logger.error("No permission to"
1763
" bind to interface %s",
1183
logger.error(u"No permission to"
1184
u" bind to interface %s",
1764
1185
self.interface)
1765
1186
elif error[0] == errno.ENOPROTOOPT:
1766
logger.error("SO_BINDTODEVICE not available;"
1767
" cannot bind to interface %s",
1187
logger.error(u"SO_BINDTODEVICE not available;"
1188
u" cannot bind to interface %s",
1768
1189
self.interface)
1769
1190
else:
1770
1191
raise
1772
1193
if self.server_address[0] or self.server_address[1]:
1773
1194
if not self.server_address[0]:
1774
1195
if self.address_family == socket.AF_INET6:
1775
any_address = "::" # in6addr_any
1196
any_address = u"::" # in6addr_any
1776
1197
else:
1777
1198
any_address = socket.INADDR_ANY
1778
1199
self.server_address = (any_address,
1805
1226
self.enabled = False
1806
1227
self.clients = clients
1807
1228
if self.clients is None:
1808
self.clients = {}
1229
self.clients = set()
1809
1230
self.use_dbus = use_dbus
1810
1231
self.gnutls_priority = gnutls_priority
1811
1232
IPv6_TCPServer.__init__(self, server_address,
1815
1236
def server_activate(self):
1816
1237
if self.enabled:
1817
1238
return socketserver.TCPServer.server_activate(self)
1818
1819
1239
def enable(self):
1820
1240
self.enabled = True
1821
1822
def add_pipe(self, parent_pipe, proc):
1241
def add_pipe(self, pipe):
1823
1242
# Call "handle_ipc" for both data and EOF events
1824
gobject.io_add_watch(parent_pipe.fileno(),
1825
gobject.IO_IN | gobject.IO_HUP,
1826
functools.partial(self.handle_ipc,
1827
parent_pipe =
1828
parent_pipe,
1829
proc = proc))
1830
1831
def handle_ipc(self, source, condition, parent_pipe=None,
1832
proc = None, client_object=None):
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={}):
1833
1246
condition_names = {
1834
gobject.IO_IN: "IN", # There is data to read.
1835
gobject.IO_OUT: "OUT", # Data can be written (without
1247
gobject.IO_IN: u"IN", # There is data to read.
1248
gobject.IO_OUT: u"OUT", # Data can be written (without
1836
1249
# blocking).
1837
gobject.IO_PRI: "PRI", # There is urgent data to read.
1838
gobject.IO_ERR: "ERR", # Error condition.
1839
gobject.IO_HUP: "HUP" # Hung up (the connection has been
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
1840
1253
# broken, usually for pipes and
1841
1254
# sockets).
1842
1255
}
1844
1257
for cond, name in
1845
1258
condition_names.iteritems()
1846
1259
if cond & condition)
1847
# error, or the other end of multiprocessing.Pipe has closed
1848
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1849
# Wait for other process to exit
1850
proc.join()
1851
return False
1852
1853
# Read a request from the child
1854
request = parent_pipe.recv()
1855
command = request[0]
1856
1857
if command == 'init':
1858
fpr = request[1]
1859
address = request[2]
1860
1861
for c in self.clients.itervalues():
1862
if c.fingerprint == fpr:
1863
client = c
1864
break
1865
else:
1866
logger.info("Client not found for fingerprint: %s, ad"
1867
"dress: %s", fpr, address)
1868
if self.use_dbus:
1869
# Emit D-Bus signal
1870
mandos_dbus_service.ClientNotFound(fpr,
1871
address[0])
1872
parent_pipe.send(False)
1873
return False
1874
1875
gobject.io_add_watch(parent_pipe.fileno(),
1876
gobject.IO_IN | gobject.IO_HUP,
1877
functools.partial(self.handle_ipc,
1878
parent_pipe =
1879
parent_pipe,
1880
proc = proc,
1881
client_object =
1882
client))
1883
parent_pipe.send(True)
1884
# remove the old hook in favor of the new above hook on
1885
# same fileno
1886
return False
1887
if command == 'funcall':
1888
funcname = request[1]
1889
args = request[2]
1890
kwargs = request[3]
1891
1892
parent_pipe.send(('data', getattr(client_object,
1893
funcname)(*args,
1894
**kwargs)))
1895
1896
if command == 'getattr':
1897
attrname = request[1]
1898
if callable(client_object.__getattribute__(attrname)):
1899
parent_pipe.send(('function',))
1900
else:
1901
parent_pipe.send(('data', client_object
1902
.__getattribute__(attrname)))
1903
1904
if command == 'setattr':
1905
attrname = request[1]
1906
value = request[2]
1907
setattr(client_object, attrname, value)
1908
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
1909
1314
return True
1910
1315
1911
1316
1912
1317
def string_to_delta(interval):
1913
1318
"""Parse a string and return a datetime.timedelta
1914
1319
1915
>>> string_to_delta('7d')
1320
>>> string_to_delta(u'7d')
1916
1321
datetime.timedelta(7)
1917
>>> string_to_delta('60s')
1322
>>> string_to_delta(u'60s')
1918
1323
datetime.timedelta(0, 60)
1919
>>> string_to_delta('60m')
1324
>>> string_to_delta(u'60m')
1920
1325
datetime.timedelta(0, 3600)
1921
>>> string_to_delta('24h')
1326
>>> string_to_delta(u'24h')
1922
1327
datetime.timedelta(1)
1923
>>> string_to_delta('1w')
1328
>>> string_to_delta(u'1w')
1924
1329
datetime.timedelta(7)
1925
>>> string_to_delta('5m 30s')
1330
>>> string_to_delta(u'5m 30s')
1926
1331
datetime.timedelta(0, 330)
1927
1332
"""
1928
1333
timevalue = datetime.timedelta(0)
1930
1335
try:
1931
1336
suffix = unicode(s[-1])
1932
1337
value = int(s[:-1])
1933
if suffix == "d":
1338
if suffix == u"d":
1934
1339
delta = datetime.timedelta(value)
1935
elif suffix == "s":
1340
elif suffix == u"s":
1936
1341
delta = datetime.timedelta(0, value)
1937
elif suffix == "m":
1342
elif suffix == u"m":
1938
1343
delta = datetime.timedelta(0, 0, 0, 0, value)
1939
elif suffix == "h":
1344
elif suffix == u"h":
1940
1345
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1941
elif suffix == "w":
1346
elif suffix == u"w":
1942
1347
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1943
1348
else:
1944
raise ValueError("Unknown suffix %r" % suffix)
1945
except (ValueError, IndexError) as e:
1946
raise ValueError(*(e.args))
1349
raise ValueError(u"Unknown suffix %r" % suffix)
1350
except (ValueError, IndexError), e:
1351
raise ValueError(e.message)
1947
1352
timevalue += delta
1948
1353
return timevalue
1949
1354
1950
1355
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
1951
1380
def daemon(nochdir = False, noclose = False):
1952
1381
"""See daemon(3). Standard BSD Unix function.
1953
1382
1956
1385
sys.exit()
1957
1386
os.setsid()
1958
1387
if not nochdir:
1959
os.chdir("/")
1388
os.chdir(u"/")
1960
1389
if os.fork():
1961
1390
sys.exit()
1962
1391
if not noclose:
1964
1393
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1965
1394
if not stat.S_ISCHR(os.fstat(null).st_mode):
1966
1395
raise OSError(errno.ENODEV,
1967
"%s not a character device"
1396
u"%s not a character device"
1968
1397
% os.path.devnull)
1969
1398
os.dup2(null, sys.stdin.fileno())
1970
1399
os.dup2(null, sys.stdout.fileno())
1978
1407
##################################################################
1979
1408
# Parsing of options, both command line and config file
1980
1409
1981
parser = argparse.ArgumentParser()
1982
parser.add_argument("-v", "--version", action="version",
1983
version = "%%(prog)s %s" % version,
1984
help="show version number and exit")
1985
parser.add_argument("-i", "--interface", metavar="IF",
1986
help="Bind to interface IF")
1987
parser.add_argument("-a", "--address",
1988
help="Address to listen for requests on")
1989
parser.add_argument("-p", "--port", type=int,
1990
help="Port number to receive requests on")
1991
parser.add_argument("--check", action="store_true",
1992
help="Run self-test")
1993
parser.add_argument("--debug", action="store_true",
1994
help="Debug mode; run in foreground and log"
1995
" to terminal")
1996
parser.add_argument("--debuglevel", metavar="LEVEL",
1997
help="Debug level for stdout output")
1998
parser.add_argument("--priority", help="GnuTLS"
1999
" priority string (see GnuTLS documentation)")
2000
parser.add_argument("--servicename",
2001
metavar="NAME", help="Zeroconf service name")
2002
parser.add_argument("--configdir",
2003
default="/etc/mandos", metavar="DIR",
2004
help="Directory to search for configuration"
2005
" files")
2006
parser.add_argument("--no-dbus", action="store_false",
2007
dest="use_dbus", help="Do not provide D-Bus"
2008
" system bus interface")
2009
parser.add_argument("--no-ipv6", action="store_false",
2010
dest="use_ipv6", help="Do not use IPv6")
2011
parser.add_argument("--no-restore", action="store_false",
2012
dest="restore", help="Do not restore stored"
2013
" state")
2014
parser.add_argument("--statedir", metavar="DIR",
2015
help="Directory to save/restore state in")
2016
2017
options = parser.parse_args()
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]
2018
1436
2019
1437
if options.check:
2020
1438
import doctest
2022
1440
sys.exit()
2023
1441
2024
1442
# Default values for config file for server-global settings
2025
server_defaults = { "interface": "",
2026
"address": "",
2027
"port": "",
2028
"debug": "False",
2029
"priority":
2030
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2031
"servicename": "Mandos",
2032
"use_dbus": "True",
2033
"use_ipv6": "True",
2034
"debuglevel": "",
2035
"restore": "True",
2036
"statedir": "/var/lib/mandos"
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",
2037
1452
}
2038
1453
2039
1454
# Parse config file for server-global settings
2040
1455
server_config = configparser.SafeConfigParser(server_defaults)
2041
1456
del server_defaults
2042
1457
server_config.read(os.path.join(options.configdir,
2043
"mandos.conf"))
1458
u"mandos.conf"))
2044
1459
# Convert the SafeConfigParser object to a dict
2045
1460
server_settings = server_config.defaults()
2046
1461
# Use the appropriate methods on the non-string config options
2047
for option in ("debug", "use_dbus", "use_ipv6"):
2048
server_settings[option] = server_config.getboolean("DEFAULT",
1462
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1463
server_settings[option] = server_config.getboolean(u"DEFAULT",
2049
1464
option)
2050
1465
if server_settings["port"]:
2051
server_settings["port"] = server_config.getint("DEFAULT",
2052
"port")
1466
server_settings["port"] = server_config.getint(u"DEFAULT",
1467
u"port")
2053
1468
del server_config
2054
1469
2055
1470
# Override the settings from the config file with command line
2056
1471
# options, if set.
2057
for option in ("interface", "address", "port", "debug",
2058
"priority", "servicename", "configdir",
2059
"use_dbus", "use_ipv6", "debuglevel", "restore",
2060
"statedir"):
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"):
2061
1475
value = getattr(options, option)
2062
1476
if value is not None:
2063
1477
server_settings[option] = value
2071
1485
##################################################################
2072
1486
2073
1487
# For convenience
2074
debug = server_settings["debug"]
2075
debuglevel = server_settings["debuglevel"]
2076
use_dbus = server_settings["use_dbus"]
2077
use_ipv6 = server_settings["use_ipv6"]
2078
stored_state_path = os.path.join(server_settings["statedir"],
2079
stored_state_file)
2080
2081
if debug:
2082
initlogger(debug, logging.DEBUG)
2083
else:
2084
if not debuglevel:
2085
initlogger(debug)
2086
else:
2087
level = getattr(logging, debuglevel.upper())
2088
initlogger(debug, level)
2089
2090
if server_settings["servicename"] != "Mandos":
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":
2091
1497
syslogger.setFormatter(logging.Formatter
2092
('Mandos (%s) [%%(process)d]:'
2093
' %%(levelname)s: %%(message)s'
2094
% server_settings["servicename"]))
1498
(u'Mandos (%s) [%%(process)d]:'
1499
u' %%(levelname)s: %%(message)s'
1500
% server_settings[u"servicename"]))
2095
1501
2096
1502
# Parse config file with clients
2097
client_config = configparser.SafeConfigParser(Client.client_defaults)
2098
client_config.read(os.path.join(server_settings["configdir"],
2099
"clients.conf"))
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"))
2100
1511
2101
1512
global mandos_dbus_service
2102
1513
mandos_dbus_service = None
2103
1514
2104
tcp_server = MandosServer((server_settings["address"],
2105
server_settings["port"]),
1515
tcp_server = MandosServer((server_settings[u"address"],
1516
server_settings[u"port"]),
2106
1517
ClientHandler,
2107
interface=(server_settings["interface"]
2108
or None),
1518
interface=server_settings[u"interface"],
2109
1519
use_ipv6=use_ipv6,
2110
1520
gnutls_priority=
2111
server_settings["priority"],
1521
server_settings[u"priority"],
2112
1522
use_dbus=use_dbus)
2113
if not debug:
2114
pidfilename = "/var/run/mandos.pid"
2115
try:
2116
pidfile = open(pidfilename, "w")
2117
except IOError:
2118
logger.error("Could not open file %r", pidfilename)
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)
2119
1528
2120
1529
try:
2121
uid = pwd.getpwnam("_mandos").pw_uid
2122
gid = pwd.getpwnam("_mandos").pw_gid
1530
uid = pwd.getpwnam(u"_mandos").pw_uid
1531
gid = pwd.getpwnam(u"_mandos").pw_gid
2123
1532
except KeyError:
2124
1533
try:
2125
uid = pwd.getpwnam("mandos").pw_uid
2126
gid = pwd.getpwnam("mandos").pw_gid
1534
uid = pwd.getpwnam(u"mandos").pw_uid
1535
gid = pwd.getpwnam(u"mandos").pw_gid
2127
1536
except KeyError:
2128
1537
try:
2129
uid = pwd.getpwnam("nobody").pw_uid
2130
gid = pwd.getpwnam("nobody").pw_gid
1538
uid = pwd.getpwnam(u"nobody").pw_uid
1539
gid = pwd.getpwnam(u"nobody").pw_gid
2131
1540
except KeyError:
2132
1541
uid = 65534
2133
1542
gid = 65534
2134
1543
try:
2135
1544
os.setgid(gid)
2136
1545
os.setuid(uid)
2137
except OSError as error:
1546
except OSError, error:
2138
1547
if error[0] != errno.EPERM:
2139
1548
raise error
2140
1549
1550
# Enable all possible GnuTLS debugging
2141
1551
if debug:
2142
# Enable all possible GnuTLS debugging
2143
2144
1552
# "Use a log level over 10 to enable all debugging options."
2145
1553
# - GnuTLS manual
2146
1554
gnutls.library.functions.gnutls_global_set_log_level(11)
2147
1555
2148
1556
@gnutls.library.types.gnutls_log_func
2149
1557
def debug_gnutls(level, string):
2150
logger.debug("GnuTLS: %s", string[:-1])
1558
logger.debug(u"GnuTLS: %s", string[:-1])
2151
1559
2152
1560
(gnutls.library.functions
2153
1561
.gnutls_global_set_log_function(debug_gnutls))
2154
2155
# Redirect stdin so all checkers get /dev/null
2156
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2157
os.dup2(null, sys.stdin.fileno())
2158
if null > 2:
2159
os.close(null)
2160
2161
# Need to fork before connecting to D-Bus
2162
if not debug:
2163
# Close all input and output, do double fork, etc.
2164
daemon()
2165
2166
gobject.threads_init()
2167
1562
2168
1563
global main_loop
2169
1564
# From the Avahi example code
2172
1567
bus = dbus.SystemBus()
2173
1568
# End of Avahi example code
2174
1569
if use_dbus:
2175
try:
2176
bus_name = dbus.service.BusName("se.recompile.Mandos",
2177
bus, do_not_queue=True)
2178
old_bus_name = (dbus.service.BusName
2179
("se.bsnet.fukt.Mandos", bus,
2180
do_not_queue=True))
2181
except dbus.exceptions.NameExistsException as e:
2182
logger.error(unicode(e) + ", disabling D-Bus")
2183
use_dbus = False
2184
server_settings["use_dbus"] = False
2185
tcp_server.use_dbus = False
1570
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2186
1571
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2187
service = AvahiServiceToSyslog(name =
2188
server_settings["servicename"],
2189
servicetype = "_mandos._tcp",
2190
protocol = protocol, bus = bus)
1572
service = AvahiService(name = server_settings[u"servicename"],
1573
servicetype = u"_mandos._tcp",
1574
protocol = protocol, bus = bus)
2191
1575
if server_settings["interface"]:
2192
1576
service.interface = (if_nametoindex
2193
(str(server_settings["interface"])))
2194
2195
global multiprocessing_manager
2196
multiprocessing_manager = multiprocessing.Manager()
1577
(str(server_settings[u"interface"])))
2197
1578
2198
1579
client_class = Client
2199
1580
if use_dbus:
2200
client_class = functools.partial(ClientDBusTransitional,
2201
bus = bus)
2202
2203
client_settings = Client.config_parser(client_config)
2204
old_client_settings = {}
2205
clients_data = {}
2206
2207
# Get client data and settings from last running state.
2208
if server_settings["restore"]:
2209
try:
2210
with open(stored_state_path, "rb") as stored_state:
2211
clients_data, old_client_settings = (pickle.load
2212
(stored_state))
2213
os.remove(stored_state_path)
2214
except IOError as e:
2215
logger.warning("Could not load persistent state: {0}"
2216
.format(e))
2217
if e.errno != errno.ENOENT:
2218
raise
2219
except EOFError as e:
2220
logger.warning("Could not load persistent state: "
2221
"EOFError: {0}".format(e))
2222
2223
with PGPEngine() as pgp:
2224
for client_name, client in clients_data.iteritems():
2225
# Decide which value to use after restoring saved state.
2226
# We have three different values: Old config file,
2227
# new config file, and saved state.
2228
# New config value takes precedence if it differs from old
2229
# config value, otherwise use saved state.
2230
for name, value in client_settings[client_name].items():
2231
try:
2232
# For each value in new config, check if it
2233
# differs from the old config value (Except for
2234
# the "secret" attribute)
2235
if (name != "secret" and
2236
value != old_client_settings[client_name]
2237
[name]):
2238
client[name] = value
2239
except KeyError:
2240
pass
2241
2242
# Clients who has passed its expire date can still be
2243
# enabled if its last checker was successful. Clients
2244
# whose checker failed before we stored its state is
2245
# assumed to have failed all checkers during downtime.
2246
if client["enabled"]:
2247
if datetime.datetime.utcnow() >= client["expires"]:
2248
if not client["last_checked_ok"]:
2249
logger.warning(
2250
"disabling client {0} - Client never "
2251
"performed a successfull checker"
2252
.format(client["name"]))
2253
client["enabled"] = False
2254
elif client["last_checker_status"] != 0:
2255
logger.warning(
2256
"disabling client {0} - Client "
2257
"last checker failed with error code {1}"
2258
.format(client["name"],
2259
client["last_checker_status"]))
2260
client["enabled"] = False
2261
else:
2262
client["expires"] = (datetime.datetime
2263
.utcnow()
2264
+ client["timeout"])
2265
2266
try:
2267
client["secret"] = (
2268
pgp.decrypt(client["encrypted_secret"],
2269
client_settings[client_name]
2270
["secret"]))
2271
except PGPError:
2272
# If decryption fails, we use secret from new settings
2273
logger.debug("Failed to decrypt {0} old secret"
2274
.format(client_name))
2275
client["secret"] = (
2276
client_settings[client_name]["secret"])
2277
2278
2279
# Add/remove clients based on new changes made to config
2280
for client_name in set(old_client_settings) - set(client_settings):
2281
del clients_data[client_name]
2282
for client_name in set(client_settings) - set(old_client_settings):
2283
clients_data[client_name] = client_settings[client_name]
2284
2285
# Create clients all clients
2286
for client_name, client in clients_data.iteritems():
2287
tcp_server.clients[client_name] = client_class(
2288
name = client_name, settings = client)
2289
1581
client_class = functools.partial(ClientDBus, bus = bus)
1582
tcp_server.clients.update(set(
1583
client_class(name = section,
1584
config= dict(client_config.items(section)))
1585
for section in client_config.sections()))
2290
1586
if not tcp_server.clients:
2291
logger.warning("No clients defined")
2292
1587
logger.warning(u"No clients defined")
1588
1589
if debug:
1590
# Redirect stdin so all checkers get /dev/null
1591
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1592
os.dup2(null, sys.stdin.fileno())
1593
if null > 2:
1594
os.close(null)
1595
else:
1596
# No console logging
1597
logger.removeHandler(console)
1598
# Close all input and output, do double fork, etc.
1599
daemon()
1600
1601
try:
1602
with closing(pidfile):
1603
pid = os.getpid()
1604
pidfile.write(str(pid) + "\n")
1605
del pidfile
1606
except IOError:
1607
logger.error(u"Could not write to file %r with PID %d",
1608
pidfilename, pid)
1609
except NameError:
1610
# "pidfile" was never created
1611
pass
1612
del pidfilename
1613
2293
1614
if not debug:
2294
try:
2295
with pidfile:
2296
pid = os.getpid()
2297
pidfile.write(str(pid) + "\n".encode("utf-8"))
2298
del pidfile
2299
except IOError:
2300
logger.error("Could not write to file %r with PID %d",
2301
pidfilename, pid)
2302
except NameError:
2303
# "pidfile" was never created
2304
pass
2305
del pidfilename
2306
1615
signal.signal(signal.SIGINT, signal.SIG_IGN)
2307
2308
1616
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2309
1617
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2310
1618
2312
1620
class MandosDBusService(dbus.service.Object):
2313
1621
"""A D-Bus proxy object"""
2314
1622
def __init__(self):
2315
dbus.service.Object.__init__(self, bus, "/")
2316
_interface = "se.recompile.Mandos"
2317
2318
@dbus.service.signal(_interface, signature="o")
2319
def ClientAdded(self, objpath):
2320
"D-Bus signal"
2321
pass
2322
2323
@dbus.service.signal(_interface, signature="ss")
2324
def ClientNotFound(self, fingerprint, address):
2325
"D-Bus signal"
2326
pass
2327
2328
@dbus.service.signal(_interface, signature="os")
1623
dbus.service.Object.__init__(self, bus, u"/")
1624
_interface = u"se.bsnet.fukt.Mandos"
1625
1626
@dbus.service.signal(_interface, signature=u"oa{sv}")
1627
def ClientAdded(self, objpath, properties):
1628
"D-Bus signal"
1629
pass
1630
1631
@dbus.service.signal(_interface, signature=u"s")
1632
def ClientNotFound(self, fingerprint):
1633
"D-Bus signal"
1634
pass
1635
1636
@dbus.service.signal(_interface, signature=u"os")
2329
1637
def ClientRemoved(self, objpath, name):
2330
1638
"D-Bus signal"
2331
1639
pass
2332
1640
2333
@dbus.service.method(_interface, out_signature="ao")
1641
@dbus.service.method(_interface, out_signature=u"ao")
2334
1642
def GetAllClients(self):
2335
1643
"D-Bus method"
2336
1644
return dbus.Array(c.dbus_object_path
2337
for c in
2338
tcp_server.clients.itervalues())
1645
for c in tcp_server.clients)
2339
1646
2340
1647
@dbus.service.method(_interface,
2341
out_signature="a{oa{sv}}")
1648
out_signature=u"a{oa{sv}}")
2342
1649
def GetAllClientsWithProperties(self):
2343
1650
"D-Bus method"
2344
1651
return dbus.Dictionary(
2345
((c.dbus_object_path, c.GetAll(""))
2346
for c in tcp_server.clients.itervalues()),
2347
signature="oa{sv}")
1652
((c.dbus_object_path, c.GetAll(u""))
1653
for c in tcp_server.clients),
1654
signature=u"oa{sv}")
2348
1655
2349
@dbus.service.method(_interface, in_signature="o")
1656
@dbus.service.method(_interface, in_signature=u"o")
2350
1657
def RemoveClient(self, object_path):
2351
1658
"D-Bus method"
2352
for c in tcp_server.clients.itervalues():
1659
for c in tcp_server.clients:
2353
1660
if c.dbus_object_path == object_path:
2354
del tcp_server.clients[c.name]
1661
tcp_server.clients.remove(c)
2355
1662
c.remove_from_connection()
2356
1663
# Don't signal anything except ClientRemoved
2357
c.disable(quiet=True)
1664
c.disable(signal=False)
2358
1665
# Emit D-Bus signal
2359
1666
self.ClientRemoved(object_path, c.name)
2360
1667
return
2362
1669
2363
1670
del _interface
2364
1671
2365
class MandosDBusServiceTransitional(MandosDBusService):
2366
__metaclass__ = AlternateDBusNamesMetaclass
2367
mandos_dbus_service = MandosDBusServiceTransitional()
1672
mandos_dbus_service = MandosDBusService()
2368
1673
2369
1674
def cleanup():
2370
1675
"Cleanup function; run on exit"
2371
1676
service.cleanup()
2372
1677
2373
multiprocessing.active_children()
2374
if not (tcp_server.clients or client_settings):
2375
return
2376
2377
# Store client before exiting. Secrets are encrypted with key
2378
# based on what config file has. If config file is
2379
# removed/edited, old secret will thus be unrecovable.
2380
clients = {}
2381
with PGPEngine() as pgp:
2382
for client in tcp_server.clients.itervalues():
2383
key = client_settings[client.name]["secret"]
2384
client.encrypted_secret = pgp.encrypt(client.secret,
2385
key)
2386
client_dict = {}
2387
2388
# A list of attributes that can not be pickled
2389
# + secret.
2390
exclude = set(("bus", "changedstate", "secret",
2391
"checker"))
2392
for name, typ in (inspect.getmembers
2393
(dbus.service.Object)):
2394
exclude.add(name)
2395
2396
client_dict["encrypted_secret"] = (client
2397
.encrypted_secret)
2398
for attr in client.client_structure:
2399
if attr not in exclude:
2400
client_dict[attr] = getattr(client, attr)
2401
2402
clients[client.name] = client_dict
2403
del client_settings[client.name]["secret"]
2404
2405
try:
2406
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2407
prefix="clients-",
2408
dir=os.path.dirname
2409
(stored_state_path))
2410
with os.fdopen(tempfd, "wb") as stored_state:
2411
pickle.dump((clients, client_settings), stored_state)
2412
os.rename(tempname, stored_state_path)
2413
except (IOError, OSError) as e:
2414
logger.warning("Could not save persistent state: {0}"
2415
.format(e))
2416
if not debug:
2417
try:
2418
os.remove(tempname)
2419
except NameError:
2420
pass
2421
if e.errno not in set((errno.ENOENT, errno.EACCES,
2422
errno.EEXIST)):
2423
raise e
2424
2425
# Delete all clients, and settings from config
2426
1678
while tcp_server.clients:
2427
name, client = tcp_server.clients.popitem()
2428
if use_dbus:
2429
client.remove_from_connection()
1679
client = tcp_server.clients.pop()
1680
client.remove_from_connection()
1681
client.disable_hook = None
2430
1682
# Don't signal anything except ClientRemoved
2431
client.disable(quiet=True)
1683
client.disable(signal=False)
2432
1684
if use_dbus:
2433
1685
# Emit D-Bus signal
2434
mandos_dbus_service.ClientRemoved(client
2435
.dbus_object_path,
1686
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2436
1687
client.name)
2437
client_settings.clear()
2438
1688
2439
1689
atexit.register(cleanup)
2440
1690
2441
for client in tcp_server.clients.itervalues():
1691
for client in tcp_server.clients:
2442
1692
if use_dbus:
2443
1693
# Emit D-Bus signal
2444
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2445
# Need to initiate checking of clients
2446
if client.enabled:
2447
client.init_checker()
1694
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1695
client.GetAll(u""))
1696
client.enable()
2448
1697
2449
1698
tcp_server.enable()
2450
1699
tcp_server.server_activate()
2452
1701
# Find out what port we got
2453
1702
service.port = tcp_server.socket.getsockname()[1]
2454
1703
if use_ipv6:
2455
logger.info("Now listening on address %r, port %d,"
1704
logger.info(u"Now listening on address %r, port %d,"
2456
1705
" flowinfo %d, scope_id %d"
2457
1706
% tcp_server.socket.getsockname())
2458
1707
else: # IPv4
2459
logger.info("Now listening on address %r, port %d"
1708
logger.info(u"Now listening on address %r, port %d"
2460
1709
% tcp_server.socket.getsockname())
2461
1710
2462
1711
#service.interface = tcp_server.socket.getsockname()[3]
2465
1714
# From the Avahi example code
2466
1715
try:
2467
1716
service.activate()
2468
except dbus.exceptions.DBusException as error:
2469
logger.critical("DBusException: %s", error)
1717
except dbus.exceptions.DBusException, error:
1718
logger.critical(u"DBusException: %s", error)
2470
1719
cleanup()
2471
1720
sys.exit(1)
2472
1721
# End of Avahi example code
2476
1725
(tcp_server.handle_request
2477
1726
(*args[2:], **kwargs) or True))
2478
1727
2479
logger.debug("Starting main loop")
1728
logger.debug(u"Starting main loop")
2480
1729
main_loop.run()
2481
except AvahiError as error:
2482
logger.critical("AvahiError: %s", error)
1730
except AvahiError, error:
1731
logger.critical(u"AvahiError: %s", error)
2483
1732
cleanup()
2484
1733
sys.exit(1)
2485
1734
except KeyboardInterrupt:
2486
1735
if debug:
2487
print("", file=sys.stderr)
2488
logger.debug("Server received KeyboardInterrupt")
2489
logger.debug("Server exiting")
1736
print >> sys.stderr
1737
logger.debug(u"Server received KeyboardInterrupt")
1738
logger.debug(u"Server exiting")
2490
1739
# Must run before the D-Bus bus name gets deregistered
2491
1740
cleanup()
2492
1741
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0