To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 389
- compare with another revision
- download diff
- download tarball
- view history from revision 389
- Committer: Teddy Hogeborn
- Date: 2009-10-18 08:47:40 UTC
- Revision ID: teddy@fukt.bsnet.se-20091018084740-fa1qgm22lg125r10
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
- files removed:
- DBUS-API
- debian/source
- 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
15
# Copyright © 2008,2009 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@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
57
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
82
version = "1.0.12"
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(level=logging.WARNING):
114
"""init logger and add loglevel"""
115
116
syslogger.setFormatter(logging.Formatter
117
('Mandos [%(process)d]: %(levelname)s:'
118
' %(message)s'))
119
logger.addHandler(syslogger)
120
121
console = logging.StreamHandler()
122
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
123
' [%(process)d]:'
124
' %(levelname)s:'
125
' %(message)s'))
126
logger.addHandler(console)
127
logger.setLevel(level)
128
129
130
class PGPError(Exception):
131
"""Exception if encryption/decryption fails"""
132
pass
133
134
135
class PGPEngine(object):
136
"""A simple class for OpenPGP symmetric encryption & decryption"""
137
def __init__(self):
138
self.gnupg = GnuPGInterface.GnuPG()
139
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.gnupg.options.meta_interactive = False
142
self.gnupg.options.homedir = self.tempdir
143
self.gnupg.options.extra_args.extend(['--force-mdc',
144
'--quiet'])
145
146
def __enter__(self):
147
return self
148
149
def __exit__ (self, exc_type, exc_value, traceback):
150
self._cleanup()
151
return False
152
153
def __del__(self):
154
self._cleanup()
155
156
def _cleanup(self):
157
if self.tempdir is not None:
158
# Delete contents of tempdir
159
for root, dirs, files in os.walk(self.tempdir,
160
topdown = False):
161
for filename in files:
162
os.remove(os.path.join(root, filename))
163
for dirname in dirs:
164
os.rmdir(os.path.join(root, dirname))
165
# Remove tempdir
166
os.rmdir(self.tempdir)
167
self.tempdir = None
168
169
def password_encode(self, password):
170
# Passphrase can not be empty and can not contain newlines or
171
# NUL bytes. So we prefix it and hex encode it.
172
return b"mandos" + binascii.hexlify(password)
173
174
def encrypt(self, data, password):
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
177
try:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
182
f.write(data)
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
185
proc.wait()
186
except IOError as e:
187
raise PGPError(e)
188
self.gnupg.passphrase = None
189
return ciphertext
190
191
def decrypt(self, data, password):
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
194
try:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
199
f.write(data)
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
202
proc.wait()
203
except IOError as e:
204
raise PGPError(e)
205
self.gnupg.passphrase = None
206
return decrypted_plaintext
207
208
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)
209
98
210
99
class AvahiError(Exception):
211
100
def __init__(self, value, *args, **kwargs):
227
116
Attributes:
228
117
interface: integer; avahi.IF_UNSPEC or an interface index.
229
118
Used to optionally bind to the specified interface.
230
name: string; Example: 'Mandos'
231
type: string; Example: '_mandos._tcp'.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
232
121
See <http://www.dns-sd.org/ServiceTypes.html>
233
122
port: integer; what port to announce
234
123
TXT: list of strings; TXT record for the service
243
132
"""
244
133
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
245
134
servicetype = None, port = None, TXT = None,
246
domain = "", host = "", max_renames = 32768,
135
domain = u"", host = u"", max_renames = 32768,
247
136
protocol = avahi.PROTO_UNSPEC, bus = None):
248
137
self.interface = interface
249
138
self.name = name
258
147
self.group = None # our entry group
259
148
self.server = None
260
149
self.bus = bus
261
self.entry_group_state_changed_match = None
262
150
def rename(self):
263
151
"""Derived from the Avahi example code"""
264
152
if self.rename_count >= self.max_renames:
265
logger.critical("No suitable Zeroconf service name found"
266
" after %i retries, exiting.",
153
logger.critical(u"No suitable Zeroconf service name found"
154
u" after %i retries, exiting.",
267
155
self.rename_count)
268
raise AvahiServiceError("Too many renames")
269
self.name = unicode(self.server
270
.GetAlternativeServiceName(self.name))
271
logger.info("Changing Zeroconf service name to %r ...",
272
self.name)
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))
273
164
self.remove()
274
try:
275
self.add()
276
except dbus.exceptions.DBusException as error:
277
logger.critical("DBusException: %s", error)
278
self.cleanup()
279
os._exit(1)
165
self.add()
280
166
self.rename_count += 1
281
167
def remove(self):
282
168
"""Derived from the Avahi example code"""
283
if self.entry_group_state_changed_match is not None:
284
self.entry_group_state_changed_match.remove()
285
self.entry_group_state_changed_match = None
286
169
if self.group is not None:
287
170
self.group.Reset()
288
171
def add(self):
289
172
"""Derived from the Avahi example code"""
290
self.remove()
291
173
if self.group is None:
292
174
self.group = dbus.Interface(
293
175
self.bus.get_object(avahi.DBUS_NAME,
294
176
self.server.EntryGroupNew()),
295
177
avahi.DBUS_INTERFACE_ENTRY_GROUP)
296
self.entry_group_state_changed_match = (
297
self.group.connect_to_signal(
298
'StateChanged', self.entry_group_state_changed))
299
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
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' ...",
300
182
self.name, self.type)
301
183
self.group.AddService(
302
184
self.interface,
309
191
self.group.Commit()
310
192
def entry_group_state_changed(self, state, error):
311
193
"""Derived from the Avahi example code"""
312
logger.debug("Avahi entry group state change: %i", state)
194
logger.debug(u"Avahi state change: %i", state)
313
195
314
196
if state == avahi.ENTRY_GROUP_ESTABLISHED:
315
logger.debug("Zeroconf service established.")
197
logger.debug(u"Zeroconf service established.")
316
198
elif state == avahi.ENTRY_GROUP_COLLISION:
317
logger.info("Zeroconf service name collision.")
199
logger.warning(u"Zeroconf service name collision.")
318
200
self.rename()
319
201
elif state == avahi.ENTRY_GROUP_FAILURE:
320
logger.critical("Avahi: Error in group state changed %s",
202
logger.critical(u"Avahi: Error in group state changed %s",
321
203
unicode(error))
322
raise AvahiGroupError("State changed: %s"
204
raise AvahiGroupError(u"State changed: %s"
323
205
% unicode(error))
324
206
def cleanup(self):
325
207
"""Derived from the Avahi example code"""
326
208
if self.group is not None:
327
try:
328
self.group.Free()
329
except (dbus.exceptions.UnknownMethodException,
330
dbus.exceptions.DBusException):
331
pass
209
self.group.Free()
332
210
self.group = None
333
self.remove()
334
def server_state_changed(self, state, error=None):
211
def server_state_changed(self, state):
335
212
"""Derived from the Avahi example code"""
336
logger.debug("Avahi server state change: %i", state)
337
bad_states = { avahi.SERVER_INVALID:
338
"Zeroconf server invalid",
339
avahi.SERVER_REGISTERING: None,
340
avahi.SERVER_COLLISION:
341
"Zeroconf server name collision",
342
avahi.SERVER_FAILURE:
343
"Zeroconf server failure" }
344
if state in bad_states:
345
if bad_states[state] is not None:
346
if error is None:
347
logger.error(bad_states[state])
348
else:
349
logger.error(bad_states[state] + ": %r", error)
350
self.cleanup()
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
215
self.remove()
351
216
elif state == avahi.SERVER_RUNNING:
352
217
self.add()
353
else:
354
if error is None:
355
logger.debug("Unknown state: %r", state)
356
else:
357
logger.debug("Unknown state: %r: %r", state, error)
358
218
def activate(self):
359
219
"""Derived from the Avahi example code"""
360
220
if self.server is None:
361
221
self.server = dbus.Interface(
362
222
self.bus.get_object(avahi.DBUS_NAME,
363
avahi.DBUS_PATH_SERVER,
364
follow_name_owner_changes=True),
223
avahi.DBUS_PATH_SERVER),
365
224
avahi.DBUS_INTERFACE_SERVER)
366
self.server.connect_to_signal("StateChanged",
225
self.server.connect_to_signal(u"StateChanged",
367
226
self.server_state_changed)
368
227
self.server_state_changed(self.server.GetState())
369
228
370
class AvahiServiceToSyslog(AvahiService):
371
def rename(self):
372
"""Add the new name to the syslog messages"""
373
ret = AvahiService.rename(self)
374
syslogger.setFormatter(logging.Formatter
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
377
% self.name))
378
return ret
379
229
380
def timedelta_to_milliseconds(td):
381
"Convert a datetime.timedelta() to milliseconds"
382
return ((td.days * 24 * 60 * 60 * 1000)
383
+ (td.seconds * 1000)
384
+ (td.microseconds // 1000))
385
386
230
class Client(object):
387
231
"""A representation of a client host served by this server.
388
232
389
233
Attributes:
390
approved: bool(); 'None' if not yet approved/disapproved
391
approval_delay: datetime.timedelta(); Time to wait for approval
392
approval_duration: datetime.timedelta(); Duration of one approval
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)
393
248
checker: subprocess.Popen(); a running checker process used
394
249
to see if the client lives.
395
250
'None' if no process is running.
396
checker_callback_tag: a gobject event source tag, or None
397
checker_command: string; External command which is run to check
398
if client lives. %() expansions are done at
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
399
256
runtime with vars(self) as dict, so that for
400
257
instance %(name)s can be used in the command.
401
checker_initiator_tag: a gobject event source tag, or None
402
created: datetime.datetime(); (UTC) object creation
403
client_structure: Object describing what attributes a client has
404
and is used for storing the client at exit
405
258
current_checker_command: string; current running checker_command
406
disable_initiator_tag: a gobject event source tag, or None
407
enabled: bool()
408
fingerprint: string (40 or 32 hexadecimal digits); used to
409
uniquely identify the client
410
host: string; available for use by the checker command
411
interval: datetime.timedelta(); How often to start a new checker
412
last_approval_request: datetime.datetime(); (UTC) or None
413
last_checked_ok: datetime.datetime(); (UTC) or None
414
last_checker_status: integer between 0 and 255 reflecting exit
415
status of last checker. -1 reflects crashed
416
checker, or None.
417
last_enabled: datetime.datetime(); (UTC) or None
418
name: string; from the config file, used in log messages and
419
D-Bus identifiers
420
secret: bytestring; sent verbatim (over TLS) to client
421
timeout: datetime.timedelta(); How long from last_checked_ok
422
until this client is disabled
423
extended_timeout: extra long timeout when password has been sent
424
runtime_expansions: Allowed attributes for runtime expansion.
425
expires: datetime.datetime(); time (UTC) when a client will be
426
disabled, or None
427
259
"""
428
260
429
runtime_expansions = ("approval_delay", "approval_duration",
430
"created", "enabled", "fingerprint",
431
"host", "interval", "last_checked_ok",
432
"last_enabled", "name", "timeout")
433
client_defaults = { "timeout": "5m",
434
"extended_timeout": "15m",
435
"interval": "2m",
436
"checker": "fping -q -- %%(host)s",
437
"host": "",
438
"approval_delay": "0s",
439
"approval_duration": "1s",
440
"approved_by_default": "True",
441
"enabled": "True",
442
}
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))
443
267
444
268
def timeout_milliseconds(self):
445
269
"Return the 'timeout' attribute in milliseconds"
446
return timedelta_to_milliseconds(self.timeout)
447
448
def extended_timeout_milliseconds(self):
449
"Return the 'extended_timeout' attribute in milliseconds"
450
return timedelta_to_milliseconds(self.extended_timeout)
270
return self._timedelta_to_milliseconds(self.timeout)
451
271
452
272
def interval_milliseconds(self):
453
273
"Return the 'interval' attribute in milliseconds"
454
return timedelta_to_milliseconds(self.interval)
274
return self._timedelta_to_milliseconds(self.interval)
455
275
456
def approval_delay_milliseconds(self):
457
return timedelta_to_milliseconds(self.approval_delay)
458
459
@staticmethod
460
def config_parser(config):
461
""" Construct a new dict of client settings of this form:
462
{ client_name: {setting_name: value, ...}, ...}
463
with exceptions for any special settings as defined above"""
464
settings = {}
465
for client_name in config.sections():
466
section = dict(config.items(client_name))
467
client = settings[client_name] = {}
468
469
client["host"] = section["host"]
470
# Reformat values from string types to Python types
471
client["approved_by_default"] = config.getboolean(
472
client_name, "approved_by_default")
473
client["enabled"] = config.getboolean(client_name, "enabled")
474
475
client["fingerprint"] = (section["fingerprint"].upper()
476
.replace(" ", ""))
477
if "secret" in section:
478
client["secret"] = section["secret"].decode("base64")
479
elif "secfile" in section:
480
with open(os.path.expanduser(os.path.expandvars
481
(section["secfile"])),
482
"rb") as secfile:
483
client["secret"] = secfile.read()
484
else:
485
raise TypeError("No secret or secfile for section %s"
486
% section)
487
client["timeout"] = string_to_delta(section["timeout"])
488
client["extended_timeout"] = string_to_delta(
489
section["extended_timeout"])
490
client["interval"] = string_to_delta(section["interval"])
491
client["approval_delay"] = string_to_delta(
492
section["approval_delay"])
493
client["approval_duration"] = string_to_delta(
494
section["approval_duration"])
495
client["checker_command"] = section["checker"]
496
client["last_approval_request"] = None
497
client["last_checked_ok"] = None
498
client["last_checker_status"] = None
499
if client["enabled"]:
500
client["last_enabled"] = datetime.datetime.utcnow()
501
client["expires"] = (datetime.datetime.utcnow()
502
+ client["timeout"])
503
else:
504
client["last_enabled"] = None
505
client["expires"] = None
506
507
return settings
508
509
510
def __init__(self, settings, name = None):
276
def __init__(self, name = None, disable_hook=None, config=None):
511
277
"""Note: the 'checker' key in 'config' sets the
512
278
'checker_command' attribute and *not* the 'checker'
513
279
attribute."""
514
280
self.name = name
515
# adding all client settings
516
for setting, value in settings.iteritems():
517
setattr(self, setting, value)
518
519
logger.debug("Creating client %r", self.name)
281
if config is None:
282
config = {}
283
logger.debug(u"Creating client %r", self.name)
520
284
# Uppercase and remove spaces from fingerprint for later
521
285
# comparison purposes with return value from the fingerprint()
522
286
# function
523
logger.debug(" Fingerprint: %s", self.fingerprint)
524
self.created = settings.get("created", datetime.datetime.utcnow())
525
526
# 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
527
309
self.checker = None
528
310
self.checker_initiator_tag = None
529
311
self.disable_initiator_tag = None
530
312
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
531
314
self.current_checker_command = None
532
self.approved = None
533
self.approvals_pending = 0
534
self.changedstate = (multiprocessing_manager
535
.Condition(multiprocessing_manager
536
.Lock()))
537
self.client_structure = [attr for attr in
538
self.__dict__.iterkeys()
539
if not attr.startswith("_")]
540
self.client_structure.append("client_structure")
541
542
for name, t in inspect.getmembers(type(self),
543
lambda obj:
544
isinstance(obj,
545
property)):
546
if not name.startswith("_"):
547
self.client_structure.append(name)
548
549
# Send notice to process children that client state has changed
550
def send_changedstate(self):
551
with self.changedstate:
552
self.changedstate.notify_all()
315
self.last_connect = None
553
316
554
317
def enable(self):
555
318
"""Start this client's checker and timeout hooks"""
556
if getattr(self, "enabled", False):
319
if getattr(self, u"enabled", False):
557
320
# Already enabled
558
321
return
559
self.send_changedstate()
560
self.expires = datetime.datetime.utcnow() + self.timeout
561
self.enabled = True
562
322
self.last_enabled = datetime.datetime.utcnow()
563
self.init_checker()
564
565
def disable(self, quiet=True):
566
"""Disable this client."""
567
if not getattr(self, "enabled", False):
568
return False
569
if not quiet:
570
self.send_changedstate()
571
if not quiet:
572
logger.info("Disabling client %s", self.name)
573
if getattr(self, "disable_initiator_tag", False):
574
gobject.source_remove(self.disable_initiator_tag)
575
self.disable_initiator_tag = None
576
self.expires = None
577
if getattr(self, "checker_initiator_tag", False):
578
gobject.source_remove(self.checker_initiator_tag)
579
self.checker_initiator_tag = None
580
self.stop_checker()
581
self.enabled = False
582
# Do not run this again if called by a gobject.timeout_add
583
return False
584
585
def __del__(self):
586
self.disable()
587
588
def init_checker(self):
589
323
# Schedule a new checker to be started an 'interval' from now,
590
324
# and every interval from then on.
591
325
self.checker_initiator_tag = (gobject.timeout_add
592
326
(self.interval_milliseconds(),
593
327
self.start_checker))
328
# Also start a new checker *right now*.
329
self.start_checker()
594
330
# Schedule a disable() when 'timeout' has passed
595
331
self.disable_initiator_tag = (gobject.timeout_add
596
332
(self.timeout_milliseconds(),
597
333
self.disable))
598
# Also start a new checker *right now*.
599
self.start_checker()
334
self.enabled = True
335
336
def disable(self):
337
"""Disable this client."""
338
if not getattr(self, "enabled", False):
339
return False
340
logger.info(u"Disabling client %s", self.name)
341
if getattr(self, u"disable_initiator_tag", False):
342
gobject.source_remove(self.disable_initiator_tag)
343
self.disable_initiator_tag = None
344
if getattr(self, u"checker_initiator_tag", False):
345
gobject.source_remove(self.checker_initiator_tag)
346
self.checker_initiator_tag = None
347
self.stop_checker()
348
if self.disable_hook:
349
self.disable_hook(self)
350
self.enabled = False
351
# Do not run this again if called by a gobject.timeout_add
352
return False
353
354
def __del__(self):
355
self.disable_hook = None
356
self.disable()
600
357
601
358
def checker_callback(self, pid, condition, command):
602
359
"""The checker has completed, so take appropriate actions."""
603
360
self.checker_callback_tag = None
604
361
self.checker = None
605
362
if os.WIFEXITED(condition):
606
self.last_checker_status = os.WEXITSTATUS(condition)
607
if self.last_checker_status == 0:
608
logger.info("Checker for %(name)s succeeded",
363
exitstatus = os.WEXITSTATUS(condition)
364
if exitstatus == 0:
365
logger.info(u"Checker for %(name)s succeeded",
609
366
vars(self))
610
367
self.checked_ok()
611
368
else:
612
logger.info("Checker for %(name)s failed",
369
logger.info(u"Checker for %(name)s failed",
613
370
vars(self))
614
371
else:
615
self.last_checker_status = -1
616
logger.warning("Checker for %(name)s crashed?",
372
logger.warning(u"Checker for %(name)s crashed?",
617
373
vars(self))
618
374
619
def checked_ok(self, timeout=None):
375
def checked_ok(self):
620
376
"""Bump up the timeout for this client.
621
377
622
378
This should only be called when the client has been seen,
623
379
alive and well.
624
380
"""
625
if timeout is None:
626
timeout = self.timeout
627
381
self.last_checked_ok = datetime.datetime.utcnow()
628
if self.disable_initiator_tag is not None:
629
gobject.source_remove(self.disable_initiator_tag)
630
if getattr(self, "enabled", False):
631
self.disable_initiator_tag = (gobject.timeout_add
632
(timedelta_to_milliseconds
633
(timeout), self.disable))
634
self.expires = datetime.datetime.utcnow() + timeout
635
636
def need_approval(self):
637
self.last_approval_request = datetime.datetime.utcnow()
382
gobject.source_remove(self.disable_initiator_tag)
383
self.disable_initiator_tag = (gobject.timeout_add
384
(self.timeout_milliseconds(),
385
self.disable))
638
386
639
387
def start_checker(self):
640
388
"""Start a new checker subprocess if one is not running.
647
395
# client would inevitably timeout, since no checker would get
648
396
# a chance to run to completion. If we instead leave running
649
397
# checkers alone, the checker would have to take more time
650
# than 'timeout' for the client to be disabled, which is as it
651
# should be.
398
# than 'timeout' for the client to be declared invalid, which
399
# is as it should be.
652
400
653
401
# If a checker exists, make sure it is not a zombie
654
402
try:
655
403
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
656
except (AttributeError, OSError) as error:
404
except (AttributeError, OSError), error:
657
405
if (isinstance(error, OSError)
658
406
and error.errno != errno.ECHILD):
659
407
raise error
660
408
else:
661
409
if pid:
662
logger.warning("Checker was a zombie")
410
logger.warning(u"Checker was a zombie")
663
411
gobject.source_remove(self.checker_callback_tag)
664
412
self.checker_callback(pid, status,
665
413
self.current_checker_command)
670
418
command = self.checker_command % self.host
671
419
except TypeError:
672
420
# Escape attributes for the shell
673
escaped_attrs = dict(
674
(attr,
675
re.escape(unicode(str(getattr(self, attr, "")),
676
errors=
677
'replace')))
678
for attr in
679
self.runtime_expansions)
680
421
escaped_attrs = dict((key,
422
re.escape(unicode(str(val),
423
errors=
424
u'replace')))
425
for key, val in
426
vars(self).iteritems())
681
427
try:
682
428
command = self.checker_command % escaped_attrs
683
except TypeError as error:
684
logger.error('Could not format string "%s":'
685
' %s', self.checker_command, error)
429
except TypeError, error:
430
logger.error(u'Could not format string "%s":'
431
u' %s', self.checker_command, error)
686
432
return True # Try again later
687
433
self.current_checker_command = command
688
434
try:
689
logger.info("Starting checker %r for %s",
435
logger.info(u"Starting checker %r for %s",
690
436
command, self.name)
691
437
# We don't need to redirect stdout and stderr, since
692
438
# in normal mode, that is already done by daemon(),
694
440
# always replaced by /dev/null.)
695
441
self.checker = subprocess.Popen(command,
696
442
close_fds=True,
697
shell=True, cwd="/")
443
shell=True, cwd=u"/")
698
444
self.checker_callback_tag = (gobject.child_watch_add
699
445
(self.checker.pid,
700
446
self.checker_callback,
705
451
if pid:
706
452
gobject.source_remove(self.checker_callback_tag)
707
453
self.checker_callback(pid, status, command)
708
except OSError as error:
709
logger.error("Failed to start subprocess: %s",
454
except OSError, error:
455
logger.error(u"Failed to start subprocess: %s",
710
456
error)
711
457
# Re-run this periodically if run by gobject.timeout_add
712
458
return True
716
462
if self.checker_callback_tag:
717
463
gobject.source_remove(self.checker_callback_tag)
718
464
self.checker_callback_tag = None
719
if getattr(self, "checker", None) is None:
465
if getattr(self, u"checker", None) is None:
720
466
return
721
logger.debug("Stopping checker for %(name)s", vars(self))
467
logger.debug(u"Stopping checker for %(name)s", vars(self))
722
468
try:
723
469
os.kill(self.checker.pid, signal.SIGTERM)
724
#time.sleep(0.5)
470
#os.sleep(0.5)
725
471
#if self.checker.poll() is None:
726
472
# os.kill(self.checker.pid, signal.SIGKILL)
727
except OSError as error:
473
except OSError, error:
728
474
if error.errno != errno.ESRCH: # No such process
729
475
raise
730
476
self.checker = None
731
732
733
def dbus_service_property(dbus_interface, signature="v",
734
access="readwrite", byte_arrays=False):
477
478
def still_valid(self):
479
"""Has the timeout not yet passed for this client?"""
480
if not getattr(self, u"enabled", False):
481
return False
482
now = datetime.datetime.utcnow()
483
if self.last_checked_ok is None:
484
return now < (self.created + self.timeout)
485
else:
486
return now < (self.last_checked_ok + self.timeout)
487
488
489
def dbus_service_property(dbus_interface, signature=u"v",
490
access=u"readwrite", byte_arrays=False):
735
491
"""Decorators for marking methods of a DBusObjectWithProperties to
736
492
become properties on the D-Bus.
737
493
742
498
dbus.service.method, except there is only "signature", since the
743
499
type from Get() and the type sent to Set() is the same.
744
500
"""
745
# Encoding deeply encoded byte arrays is not supported yet by the
746
# "Set" method, so we fail early here:
747
if byte_arrays and signature != "ay":
748
raise ValueError("Byte arrays not supported for non-'ay'"
749
" signature %r" % signature)
750
501
def decorator(func):
751
502
func._dbus_is_property = True
752
503
func._dbus_interface = dbus_interface
753
504
func._dbus_signature = signature
754
505
func._dbus_access = access
755
506
func._dbus_name = func.__name__
756
if func._dbus_name.endswith("_dbus_property"):
507
if func._dbus_name.endswith(u"_dbus_property"):
757
508
func._dbus_name = func._dbus_name[:-14]
758
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
509
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
759
510
return func
760
511
return decorator
761
512
781
532
782
533
class DBusObjectWithProperties(dbus.service.Object):
783
534
"""A D-Bus object with properties.
784
535
785
536
Classes inheriting from this can use the dbus_service_property
786
537
decorator to expose methods as D-Bus properties. It exposes the
787
538
standard Get(), Set(), and GetAll() methods on the D-Bus.
789
540
790
541
@staticmethod
791
542
def _is_dbus_property(obj):
792
return getattr(obj, "_dbus_is_property", False)
543
return getattr(obj, u"_dbus_is_property", False)
793
544
794
545
def _get_all_dbus_properties(self):
795
546
"""Returns a generator of (name, attribute) pairs
796
547
"""
797
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
798
for cls in self.__class__.__mro__
548
return ((prop._dbus_name, prop)
799
549
for name, prop in
800
inspect.getmembers(cls, self._is_dbus_property))
550
inspect.getmembers(self, self._is_dbus_property))
801
551
802
552
def _get_dbus_property(self, interface_name, property_name):
803
553
"""Returns a bound method if one exists which is a D-Bus
804
554
property with the specified name and interface.
805
555
"""
806
for cls in self.__class__.__mro__:
807
for name, value in (inspect.getmembers
808
(cls, self._is_dbus_property)):
809
if (value._dbus_name == property_name
810
and value._dbus_interface == interface_name):
811
return value.__get__(self)
812
556
for name in (property_name,
557
property_name + u"_dbus_property"):
558
prop = getattr(self, name, None)
559
if (prop is None
560
or not self._is_dbus_property(prop)
561
or prop._dbus_name != property_name
562
or (interface_name and prop._dbus_interface
563
and interface_name != prop._dbus_interface)):
564
continue
565
return prop
813
566
# No such property
814
raise DBusPropertyNotFound(self.dbus_object_path + ":"
815
+ interface_name + "."
567
raise DBusPropertyNotFound(self.dbus_object_path + u":"
568
+ interface_name + u"."
816
569
+ property_name)
817
570
818
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
819
out_signature="v")
571
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
572
out_signature=u"v")
820
573
def Get(self, interface_name, property_name):
821
574
"""Standard D-Bus property Get() method, see D-Bus standard.
822
575
"""
823
576
prop = self._get_dbus_property(interface_name, property_name)
824
if prop._dbus_access == "write":
577
if prop._dbus_access == u"write":
825
578
raise DBusPropertyAccessException(property_name)
826
579
value = prop()
827
if not hasattr(value, "variant_level"):
580
if not hasattr(value, u"variant_level"):
828
581
return value
829
582
return type(value)(value, variant_level=value.variant_level+1)
830
583
831
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
584
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
832
585
def Set(self, interface_name, property_name, value):
833
586
"""Standard D-Bus property Set() method, see D-Bus standard.
834
587
"""
835
588
prop = self._get_dbus_property(interface_name, property_name)
836
if prop._dbus_access == "read":
589
if prop._dbus_access == u"read":
837
590
raise DBusPropertyAccessException(property_name)
838
if prop._dbus_get_args_options["byte_arrays"]:
839
# The byte_arrays option is not supported yet on
840
# signatures other than "ay".
841
if prop._dbus_signature != "ay":
842
raise ValueError
591
if prop._dbus_get_args_options[u"byte_arrays"]:
843
592
value = dbus.ByteArray(''.join(unichr(byte)
844
593
for byte in value))
845
594
prop(value)
846
595
847
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
848
out_signature="a{sv}")
596
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
597
out_signature=u"a{sv}")
849
598
def GetAll(self, interface_name):
850
599
"""Standard D-Bus property GetAll() method, see D-Bus
851
600
standard.
852
601
853
602
Note: Will not include properties with access="write".
854
603
"""
855
properties = {}
604
all = {}
856
605
for name, prop in self._get_all_dbus_properties():
857
606
if (interface_name
858
607
and interface_name != prop._dbus_interface):
859
608
# Interface non-empty but did not match
860
609
continue
861
610
# Ignore write-only properties
862
if prop._dbus_access == "write":
611
if prop._dbus_access == u"write":
863
612
continue
864
613
value = prop()
865
if not hasattr(value, "variant_level"):
866
properties[name] = value
614
if not hasattr(value, u"variant_level"):
615
all[name] = value
867
616
continue
868
properties[name] = type(value)(value, variant_level=
869
value.variant_level+1)
870
return dbus.Dictionary(properties, signature="sv")
617
all[name] = type(value)(value, variant_level=
618
value.variant_level+1)
619
return dbus.Dictionary(all, signature=u"sv")
871
620
872
621
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
873
out_signature="s",
622
out_signature=u"s",
874
623
path_keyword='object_path',
875
624
connection_keyword='connection')
876
625
def Introspect(self, object_path, connection):
881
630
try:
882
631
document = xml.dom.minidom.parseString(xmlstring)
883
632
def make_tag(document, name, prop):
884
e = document.createElement("property")
885
e.setAttribute("name", name)
886
e.setAttribute("type", prop._dbus_signature)
887
e.setAttribute("access", prop._dbus_access)
633
e = document.createElement(u"property")
634
e.setAttribute(u"name", name)
635
e.setAttribute(u"type", prop._dbus_signature)
636
e.setAttribute(u"access", prop._dbus_access)
888
637
return e
889
for if_tag in document.getElementsByTagName("interface"):
638
for if_tag in document.getElementsByTagName(u"interface"):
890
639
for tag in (make_tag(document, name, prop)
891
640
for name, prop
892
641
in self._get_all_dbus_properties()
893
642
if prop._dbus_interface
894
== if_tag.getAttribute("name")):
643
== if_tag.getAttribute(u"name")):
895
644
if_tag.appendChild(tag)
896
645
# Add the names to the return values for the
897
646
# "org.freedesktop.DBus.Properties" methods
898
if (if_tag.getAttribute("name")
899
== "org.freedesktop.DBus.Properties"):
900
for cn in if_tag.getElementsByTagName("method"):
901
if cn.getAttribute("name") == "Get":
902
for arg in cn.getElementsByTagName("arg"):
903
if (arg.getAttribute("direction")
904
== "out"):
905
arg.setAttribute("name", "value")
906
elif cn.getAttribute("name") == "GetAll":
907
for arg in cn.getElementsByTagName("arg"):
908
if (arg.getAttribute("direction")
909
== "out"):
910
arg.setAttribute("name", "props")
911
xmlstring = document.toxml("utf-8")
647
if (if_tag.getAttribute(u"name")
648
== u"org.freedesktop.DBus.Properties"):
649
for cn in if_tag.getElementsByTagName(u"method"):
650
if cn.getAttribute(u"name") == u"Get":
651
for arg in cn.getElementsByTagName(u"arg"):
652
if (arg.getAttribute(u"direction")
653
== u"out"):
654
arg.setAttribute(u"name", u"value")
655
elif cn.getAttribute(u"name") == u"GetAll":
656
for arg in cn.getElementsByTagName(u"arg"):
657
if (arg.getAttribute(u"direction")
658
== u"out"):
659
arg.setAttribute(u"name", u"props")
660
xmlstring = document.toxml(u"utf-8")
912
661
document.unlink()
913
662
except (AttributeError, xml.dom.DOMException,
914
xml.parsers.expat.ExpatError) as error:
915
logger.error("Failed to override Introspection method",
663
xml.parsers.expat.ExpatError), error:
664
logger.error(u"Failed to override Introspection method",
916
665
error)
917
666
return xmlstring
918
667
919
668
920
def datetime_to_dbus (dt, variant_level=0):
921
"""Convert a UTC datetime.datetime() to a D-Bus type."""
922
if dt is None:
923
return dbus.String("", variant_level = variant_level)
924
return dbus.String(dt.isoformat(),
925
variant_level=variant_level)
926
927
928
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
929
.__metaclass__):
930
"""Applied to an empty subclass of a D-Bus object, this metaclass
931
will add additional D-Bus attributes matching a certain pattern.
932
"""
933
def __new__(mcs, name, bases, attr):
934
# Go through all the base classes which could have D-Bus
935
# methods, signals, or properties in them
936
for base in (b for b in bases
937
if issubclass(b, dbus.service.Object)):
938
# Go though all attributes of the base class
939
for attrname, attribute in inspect.getmembers(base):
940
# Ignore non-D-Bus attributes, and D-Bus attributes
941
# with the wrong interface name
942
if (not hasattr(attribute, "_dbus_interface")
943
or not attribute._dbus_interface
944
.startswith("se.recompile.Mandos")):
945
continue
946
# Create an alternate D-Bus interface name based on
947
# the current name
948
alt_interface = (attribute._dbus_interface
949
.replace("se.recompile.Mandos",
950
"se.bsnet.fukt.Mandos"))
951
# Is this a D-Bus signal?
952
if getattr(attribute, "_dbus_is_signal", False):
953
# Extract the original non-method function by
954
# black magic
955
nonmethod_func = (dict(
956
zip(attribute.func_code.co_freevars,
957
attribute.__closure__))["func"]
958
.cell_contents)
959
# Create a new, but exactly alike, function
960
# object, and decorate it to be a new D-Bus signal
961
# with the alternate D-Bus interface name
962
new_function = (dbus.service.signal
963
(alt_interface,
964
attribute._dbus_signature)
965
(types.FunctionType(
966
nonmethod_func.func_code,
967
nonmethod_func.func_globals,
968
nonmethod_func.func_name,
969
nonmethod_func.func_defaults,
970
nonmethod_func.func_closure)))
971
# Define a creator of a function to call both the
972
# old and new functions, so both the old and new
973
# signals gets sent when the function is called
974
def fixscope(func1, func2):
975
"""This function is a scope container to pass
976
func1 and func2 to the "call_both" function
977
outside of its arguments"""
978
def call_both(*args, **kwargs):
979
"""This function will emit two D-Bus
980
signals by calling func1 and func2"""
981
func1(*args, **kwargs)
982
func2(*args, **kwargs)
983
return call_both
984
# Create the "call_both" function and add it to
985
# the class
986
attr[attrname] = fixscope(attribute,
987
new_function)
988
# Is this a D-Bus method?
989
elif getattr(attribute, "_dbus_is_method", False):
990
# Create a new, but exactly alike, function
991
# object. Decorate it to be a new D-Bus method
992
# with the alternate D-Bus interface name. Add it
993
# to the class.
994
attr[attrname] = (dbus.service.method
995
(alt_interface,
996
attribute._dbus_in_signature,
997
attribute._dbus_out_signature)
998
(types.FunctionType
999
(attribute.func_code,
1000
attribute.func_globals,
1001
attribute.func_name,
1002
attribute.func_defaults,
1003
attribute.func_closure)))
1004
# Is this a D-Bus property?
1005
elif getattr(attribute, "_dbus_is_property", False):
1006
# Create a new, but exactly alike, function
1007
# object, and decorate it to be a new D-Bus
1008
# property with the alternate D-Bus interface
1009
# name. Add it to the class.
1010
attr[attrname] = (dbus_service_property
1011
(alt_interface,
1012
attribute._dbus_signature,
1013
attribute._dbus_access,
1014
attribute
1015
._dbus_get_args_options
1016
["byte_arrays"])
1017
(types.FunctionType
1018
(attribute.func_code,
1019
attribute.func_globals,
1020
attribute.func_name,
1021
attribute.func_defaults,
1022
attribute.func_closure)))
1023
return type.__new__(mcs, name, bases, attr)
1024
1025
1026
669
class ClientDBus(Client, DBusObjectWithProperties):
1027
670
"""A Client class using D-Bus
1028
671
1030
673
dbus_object_path: dbus.ObjectPath
1031
674
bus: dbus.SystemBus()
1032
675
"""
1033
1034
runtime_expansions = (Client.runtime_expansions
1035
+ ("dbus_object_path",))
1036
1037
676
# dbus.service.Object doesn't use super(), so we can't either.
1038
677
1039
678
def __init__(self, bus = None, *args, **kwargs):
1040
679
self.bus = bus
1041
680
Client.__init__(self, *args, **kwargs)
1042
self._approvals_pending = 0
1043
1044
self._approvals_pending = 0
1045
681
# Only now, when this client is initialized, can it show up on
1046
682
# the D-Bus
1047
client_object_name = unicode(self.name).translate(
1048
{ord("."): ord("_"),
1049
ord("-"): ord("_")})
1050
683
self.dbus_object_path = (dbus.ObjectPath
1051
("/clients/" + client_object_name))
684
(u"/clients/"
685
+ self.name.replace(u".", u"_")))
1052
686
DBusObjectWithProperties.__init__(self, self.bus,
1053
687
self.dbus_object_path)
1054
1055
def notifychangeproperty(transform_func,
1056
dbus_name, type_func=lambda x: x,
1057
variant_level=1):
1058
""" Modify a variable so that it's a property which announces
1059
its changes to DBus.
1060
1061
transform_fun: Function that takes a value and a variant_level
1062
and transforms it to a D-Bus type.
1063
dbus_name: D-Bus name of the variable
1064
type_func: Function that transform the value before sending it
1065
to the D-Bus. Default: no transform
1066
variant_level: D-Bus variant level. Default: 1
1067
"""
1068
attrname = "_{0}".format(dbus_name)
1069
def setter(self, value):
1070
if hasattr(self, "dbus_object_path"):
1071
if (not hasattr(self, attrname) or
1072
type_func(getattr(self, attrname, None))
1073
!= type_func(value)):
1074
dbus_value = transform_func(type_func(value),
1075
variant_level
1076
=variant_level)
1077
self.PropertyChanged(dbus.String(dbus_name),
1078
dbus_value)
1079
setattr(self, attrname, value)
1080
1081
return property(lambda self: getattr(self, attrname), setter)
1082
1083
1084
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1085
approvals_pending = notifychangeproperty(dbus.Boolean,
1086
"ApprovalPending",
1087
type_func = bool)
1088
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1089
last_enabled = notifychangeproperty(datetime_to_dbus,
1090
"LastEnabled")
1091
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1092
type_func = lambda checker:
1093
checker is not None)
1094
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1095
"LastCheckedOK")
1096
last_approval_request = notifychangeproperty(
1097
datetime_to_dbus, "LastApprovalRequest")
1098
approved_by_default = notifychangeproperty(dbus.Boolean,
1099
"ApprovedByDefault")
1100
approval_delay = notifychangeproperty(dbus.UInt64,
1101
"ApprovalDelay",
1102
type_func =
1103
timedelta_to_milliseconds)
1104
approval_duration = notifychangeproperty(
1105
dbus.UInt64, "ApprovalDuration",
1106
type_func = timedelta_to_milliseconds)
1107
host = notifychangeproperty(dbus.String, "Host")
1108
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1109
type_func =
1110
timedelta_to_milliseconds)
1111
extended_timeout = notifychangeproperty(
1112
dbus.UInt64, "ExtendedTimeout",
1113
type_func = timedelta_to_milliseconds)
1114
interval = notifychangeproperty(dbus.UInt64,
1115
"Interval",
1116
type_func =
1117
timedelta_to_milliseconds)
1118
checker_command = notifychangeproperty(dbus.String, "Checker")
1119
1120
del notifychangeproperty
688
689
@staticmethod
690
def _datetime_to_dbus(dt, variant_level=0):
691
"""Convert a UTC datetime.datetime() to a D-Bus type."""
692
return dbus.String(dt.isoformat(),
693
variant_level=variant_level)
694
695
def enable(self):
696
oldstate = getattr(self, u"enabled", False)
697
r = Client.enable(self)
698
if oldstate != self.enabled:
699
# Emit D-Bus signals
700
self.PropertyChanged(dbus.String(u"enabled"),
701
dbus.Boolean(True, variant_level=1))
702
self.PropertyChanged(
703
dbus.String(u"last_enabled"),
704
self._datetime_to_dbus(self.last_enabled,
705
variant_level=1))
706
return r
707
708
def disable(self, signal = True):
709
oldstate = getattr(self, u"enabled", False)
710
r = Client.disable(self)
711
if signal and oldstate != self.enabled:
712
# Emit D-Bus signal
713
self.PropertyChanged(dbus.String(u"enabled"),
714
dbus.Boolean(False, variant_level=1))
715
return r
1121
716
1122
717
def __del__(self, *args, **kwargs):
1123
718
try:
1124
719
self.remove_from_connection()
1125
720
except LookupError:
1126
721
pass
1127
if hasattr(DBusObjectWithProperties, "__del__"):
722
if hasattr(DBusObjectWithProperties, u"__del__"):
1128
723
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1129
724
Client.__del__(self, *args, **kwargs)
1130
725
1132
727
*args, **kwargs):
1133
728
self.checker_callback_tag = None
1134
729
self.checker = None
730
# Emit D-Bus signal
731
self.PropertyChanged(dbus.String(u"checker_running"),
732
dbus.Boolean(False, variant_level=1))
1135
733
if os.WIFEXITED(condition):
1136
734
exitstatus = os.WEXITSTATUS(condition)
1137
735
# Emit D-Bus signal
1147
745
return Client.checker_callback(self, pid, condition, command,
1148
746
*args, **kwargs)
1149
747
748
def checked_ok(self, *args, **kwargs):
749
r = Client.checked_ok(self, *args, **kwargs)
750
# Emit D-Bus signal
751
self.PropertyChanged(
752
dbus.String(u"last_checked_ok"),
753
(self._datetime_to_dbus(self.last_checked_ok,
754
variant_level=1)))
755
return r
756
1150
757
def start_checker(self, *args, **kwargs):
1151
758
old_checker = self.checker
1152
759
if self.checker is not None:
1159
766
and old_checker_pid != self.checker.pid):
1160
767
# Emit D-Bus signal
1161
768
self.CheckerStarted(self.current_checker_command)
1162
return r
1163
1164
def _reset_approved(self):
1165
self.approved = None
1166
return False
1167
1168
def approve(self, value=True):
1169
self.send_changedstate()
1170
self.approved = value
1171
gobject.timeout_add(timedelta_to_milliseconds
1172
(self.approval_duration),
1173
self._reset_approved)
1174
1175
1176
## D-Bus methods, signals & properties
1177
_interface = "se.recompile.Mandos.Client"
1178
1179
## Signals
769
self.PropertyChanged(
770
dbus.String(u"checker_running"),
771
dbus.Boolean(True, variant_level=1))
772
return r
773
774
def stop_checker(self, *args, **kwargs):
775
old_checker = getattr(self, u"checker", None)
776
r = Client.stop_checker(self, *args, **kwargs)
777
if (old_checker is not None
778
and getattr(self, u"checker", None) is None):
779
self.PropertyChanged(dbus.String(u"checker_running"),
780
dbus.Boolean(False, variant_level=1))
781
return r
782
783
## D-Bus methods & signals
784
_interface = u"se.bsnet.fukt.Mandos.Client"
785
786
# CheckedOK - method
787
@dbus.service.method(_interface)
788
def CheckedOK(self):
789
return self.checked_ok()
1180
790
1181
791
# CheckerCompleted - signal
1182
@dbus.service.signal(_interface, signature="nxs")
792
@dbus.service.signal(_interface, signature=u"nxs")
1183
793
def CheckerCompleted(self, exitcode, waitstatus, command):
1184
794
"D-Bus signal"
1185
795
pass
1186
796
1187
797
# CheckerStarted - signal
1188
@dbus.service.signal(_interface, signature="s")
798
@dbus.service.signal(_interface, signature=u"s")
1189
799
def CheckerStarted(self, command):
1190
800
"D-Bus signal"
1191
801
pass
1192
802
1193
803
# PropertyChanged - signal
1194
@dbus.service.signal(_interface, signature="sv")
804
@dbus.service.signal(_interface, signature=u"sv")
1195
805
def PropertyChanged(self, property, value):
1196
806
"D-Bus signal"
1197
807
pass
1199
809
# GotSecret - signal
1200
810
@dbus.service.signal(_interface)
1201
811
def GotSecret(self):
1202
"""D-Bus signal
1203
Is sent after a successful transfer of secret from the Mandos
1204
server to mandos-client
1205
"""
812
"D-Bus signal"
1206
813
pass
1207
814
1208
815
# Rejected - signal
1209
@dbus.service.signal(_interface, signature="s")
1210
def Rejected(self, reason):
1211
"D-Bus signal"
1212
pass
1213
1214
# NeedApproval - signal
1215
@dbus.service.signal(_interface, signature="tb")
1216
def NeedApproval(self, timeout, default):
1217
"D-Bus signal"
1218
return self.need_approval()
1219
1220
# NeRwequest - signal
1221
@dbus.service.signal(_interface, signature="s")
1222
def NewRequest(self, ip):
1223
"""D-Bus signal
1224
Is sent after a client request a password.
1225
"""
1226
pass
1227
1228
## Methods
1229
1230
# Approve - method
1231
@dbus.service.method(_interface, in_signature="b")
1232
def Approve(self, value):
1233
self.approve(value)
1234
1235
# CheckedOK - method
1236
@dbus.service.method(_interface)
1237
def CheckedOK(self):
1238
self.checked_ok()
816
@dbus.service.signal(_interface)
817
def Rejected(self):
818
"D-Bus signal"
819
pass
1239
820
1240
821
# Enable - method
1241
822
@dbus.service.method(_interface)
1260
841
def StopChecker(self):
1261
842
self.stop_checker()
1262
843
1263
## Properties
1264
1265
# ApprovalPending - property
1266
@dbus_service_property(_interface, signature="b", access="read")
1267
def ApprovalPending_dbus_property(self):
1268
return dbus.Boolean(bool(self.approvals_pending))
1269
1270
# ApprovedByDefault - property
1271
@dbus_service_property(_interface, signature="b",
1272
access="readwrite")
1273
def ApprovedByDefault_dbus_property(self, value=None):
1274
if value is None: # get
1275
return dbus.Boolean(self.approved_by_default)
1276
self.approved_by_default = bool(value)
1277
1278
# ApprovalDelay - property
1279
@dbus_service_property(_interface, signature="t",
1280
access="readwrite")
1281
def ApprovalDelay_dbus_property(self, value=None):
1282
if value is None: # get
1283
return dbus.UInt64(self.approval_delay_milliseconds())
1284
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1285
1286
# ApprovalDuration - property
1287
@dbus_service_property(_interface, signature="t",
1288
access="readwrite")
1289
def ApprovalDuration_dbus_property(self, value=None):
1290
if value is None: # get
1291
return dbus.UInt64(timedelta_to_milliseconds(
1292
self.approval_duration))
1293
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1294
1295
# Name - property
1296
@dbus_service_property(_interface, signature="s", access="read")
1297
def Name_dbus_property(self):
844
# name - property
845
@dbus_service_property(_interface, signature=u"s", access=u"read")
846
def name_dbus_property(self):
1298
847
return dbus.String(self.name)
1299
848
1300
# Fingerprint - property
1301
@dbus_service_property(_interface, signature="s", access="read")
1302
def Fingerprint_dbus_property(self):
849
# fingerprint - property
850
@dbus_service_property(_interface, signature=u"s", access=u"read")
851
def fingerprint_dbus_property(self):
1303
852
return dbus.String(self.fingerprint)
1304
853
1305
# Host - property
1306
@dbus_service_property(_interface, signature="s",
1307
access="readwrite")
1308
def Host_dbus_property(self, value=None):
854
# host - property
855
@dbus_service_property(_interface, signature=u"s",
856
access=u"readwrite")
857
def host_dbus_property(self, value=None):
1309
858
if value is None: # get
1310
859
return dbus.String(self.host)
1311
self.host = unicode(value)
1312
1313
# Created - property
1314
@dbus_service_property(_interface, signature="s", access="read")
1315
def Created_dbus_property(self):
1316
return datetime_to_dbus(self.created)
1317
1318
# LastEnabled - property
1319
@dbus_service_property(_interface, signature="s", access="read")
1320
def LastEnabled_dbus_property(self):
1321
return datetime_to_dbus(self.last_enabled)
1322
1323
# Enabled - property
1324
@dbus_service_property(_interface, signature="b",
1325
access="readwrite")
1326
def Enabled_dbus_property(self, value=None):
860
self.host = value
861
# Emit D-Bus signal
862
self.PropertyChanged(dbus.String(u"host"),
863
dbus.String(value, variant_level=1))
864
865
# created - property
866
@dbus_service_property(_interface, signature=u"s", access=u"read")
867
def created_dbus_property(self):
868
return dbus.String(self._datetime_to_dbus(self.created))
869
870
# last_enabled - property
871
@dbus_service_property(_interface, signature=u"s", access=u"read")
872
def last_enabled_dbus_property(self):
873
if self.last_enabled is None:
874
return dbus.String(u"")
875
return dbus.String(self._datetime_to_dbus(self.last_enabled))
876
877
# enabled - property
878
@dbus_service_property(_interface, signature=u"b",
879
access=u"readwrite")
880
def enabled_dbus_property(self, value=None):
1327
881
if value is None: # get
1328
882
return dbus.Boolean(self.enabled)
1329
883
if value:
1331
885
else:
1332
886
self.disable()
1333
887
1334
# LastCheckedOK - property
1335
@dbus_service_property(_interface, signature="s",
1336
access="readwrite")
1337
def LastCheckedOK_dbus_property(self, value=None):
888
# last_checked_ok - property
889
@dbus_service_property(_interface, signature=u"s",
890
access=u"readwrite")
891
def last_checked_ok_dbus_property(self, value=None):
1338
892
if value is not None:
1339
893
self.checked_ok()
1340
894
return
1341
return datetime_to_dbus(self.last_checked_ok)
1342
1343
# Expires - property
1344
@dbus_service_property(_interface, signature="s", access="read")
1345
def Expires_dbus_property(self):
1346
return datetime_to_dbus(self.expires)
1347
1348
# LastApprovalRequest - property
1349
@dbus_service_property(_interface, signature="s", access="read")
1350
def LastApprovalRequest_dbus_property(self):
1351
return datetime_to_dbus(self.last_approval_request)
1352
1353
# Timeout - property
1354
@dbus_service_property(_interface, signature="t",
1355
access="readwrite")
1356
def Timeout_dbus_property(self, value=None):
895
if self.last_checked_ok is None:
896
return dbus.String(u"")
897
return dbus.String(self._datetime_to_dbus(self
898
.last_checked_ok))
899
900
# timeout - property
901
@dbus_service_property(_interface, signature=u"t",
902
access=u"readwrite")
903
def timeout_dbus_property(self, value=None):
1357
904
if value is None: # get
1358
905
return dbus.UInt64(self.timeout_milliseconds())
1359
906
self.timeout = datetime.timedelta(0, 0, 0, value)
1360
if getattr(self, "disable_initiator_tag", None) is None:
907
# Emit D-Bus signal
908
self.PropertyChanged(dbus.String(u"timeout"),
909
dbus.UInt64(value, variant_level=1))
910
if getattr(self, u"disable_initiator_tag", None) is None:
1361
911
return
1362
912
# Reschedule timeout
1363
913
gobject.source_remove(self.disable_initiator_tag)
1364
914
self.disable_initiator_tag = None
1365
self.expires = None
1366
time_to_die = timedelta_to_milliseconds((self
1367
.last_checked_ok
1368
+ self.timeout)
1369
- datetime.datetime
1370
.utcnow())
915
time_to_die = (self.
916
_timedelta_to_milliseconds((self
917
.last_checked_ok
918
+ self.timeout)
919
- datetime.datetime
920
.utcnow()))
1371
921
if time_to_die <= 0:
1372
922
# The timeout has passed
1373
923
self.disable()
1374
924
else:
1375
self.expires = (datetime.datetime.utcnow()
1376
+ datetime.timedelta(milliseconds =
1377
time_to_die))
1378
925
self.disable_initiator_tag = (gobject.timeout_add
1379
926
(time_to_die, self.disable))
1380
927
1381
# ExtendedTimeout - property
1382
@dbus_service_property(_interface, signature="t",
1383
access="readwrite")
1384
def ExtendedTimeout_dbus_property(self, value=None):
1385
if value is None: # get
1386
return dbus.UInt64(self.extended_timeout_milliseconds())
1387
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1388
1389
# Interval - property
1390
@dbus_service_property(_interface, signature="t",
1391
access="readwrite")
1392
def Interval_dbus_property(self, value=None):
928
# interval - property
929
@dbus_service_property(_interface, signature=u"t",
930
access=u"readwrite")
931
def interval_dbus_property(self, value=None):
1393
932
if value is None: # get
1394
933
return dbus.UInt64(self.interval_milliseconds())
1395
934
self.interval = datetime.timedelta(0, 0, 0, value)
1396
if getattr(self, "checker_initiator_tag", None) is None:
935
# Emit D-Bus signal
936
self.PropertyChanged(dbus.String(u"interval"),
937
dbus.UInt64(value, variant_level=1))
938
if getattr(self, u"checker_initiator_tag", None) is None:
1397
939
return
1398
if self.enabled:
1399
# Reschedule checker run
1400
gobject.source_remove(self.checker_initiator_tag)
1401
self.checker_initiator_tag = (gobject.timeout_add
1402
(value, self.start_checker))
1403
self.start_checker() # Start one now, too
1404
1405
# Checker - property
1406
@dbus_service_property(_interface, signature="s",
1407
access="readwrite")
1408
def Checker_dbus_property(self, value=None):
940
# Reschedule checker run
941
gobject.source_remove(self.checker_initiator_tag)
942
self.checker_initiator_tag = (gobject.timeout_add
943
(value, self.start_checker))
944
self.start_checker() # Start one now, too
945
946
# checker - property
947
@dbus_service_property(_interface, signature=u"s",
948
access=u"readwrite")
949
def checker_dbus_property(self, value=None):
1409
950
if value is None: # get
1410
951
return dbus.String(self.checker_command)
1411
self.checker_command = unicode(value)
952
self.checker_command = value
953
# Emit D-Bus signal
954
self.PropertyChanged(dbus.String(u"checker"),
955
dbus.String(self.checker_command,
956
variant_level=1))
1412
957
1413
# CheckerRunning - property
1414
@dbus_service_property(_interface, signature="b",
1415
access="readwrite")
1416
def CheckerRunning_dbus_property(self, value=None):
958
# checker_running - property
959
@dbus_service_property(_interface, signature=u"b",
960
access=u"readwrite")
961
def checker_running_dbus_property(self, value=None):
1417
962
if value is None: # get
1418
963
return dbus.Boolean(self.checker is not None)
1419
964
if value:
1421
966
else:
1422
967
self.stop_checker()
1423
968
1424
# ObjectPath - property
1425
@dbus_service_property(_interface, signature="o", access="read")
1426
def ObjectPath_dbus_property(self):
969
# object_path - property
970
@dbus_service_property(_interface, signature=u"o", access=u"read")
971
def object_path_dbus_property(self):
1427
972
return self.dbus_object_path # is already a dbus.ObjectPath
1428
973
1429
# Secret = property
1430
@dbus_service_property(_interface, signature="ay",
1431
access="write", byte_arrays=True)
1432
def Secret_dbus_property(self, value):
974
# secret = property
975
@dbus_service_property(_interface, signature=u"ay",
976
access=u"write", byte_arrays=True)
977
def secret_dbus_property(self, value):
1433
978
self.secret = str(value)
1434
979
1435
980
del _interface
1436
981
1437
982
1438
class ProxyClient(object):
1439
def __init__(self, child_pipe, fpr, address):
1440
self._pipe = child_pipe
1441
self._pipe.send(('init', fpr, address))
1442
if not self._pipe.recv():
1443
raise KeyError()
1444
1445
def __getattribute__(self, name):
1446
if name == '_pipe':
1447
return super(ProxyClient, self).__getattribute__(name)
1448
self._pipe.send(('getattr', name))
1449
data = self._pipe.recv()
1450
if data[0] == 'data':
1451
return data[1]
1452
if data[0] == 'function':
1453
def func(*args, **kwargs):
1454
self._pipe.send(('funcall', name, args, kwargs))
1455
return self._pipe.recv()[1]
1456
return func
1457
1458
def __setattr__(self, name, value):
1459
if name == '_pipe':
1460
return super(ProxyClient, self).__setattr__(name, value)
1461
self._pipe.send(('setattr', name, value))
1462
1463
1464
class ClientDBusTransitional(ClientDBus):
1465
__metaclass__ = AlternateDBusNamesMetaclass
1466
1467
1468
983
class ClientHandler(socketserver.BaseRequestHandler, object):
1469
984
"""A class to handle client connections.
1470
985
1472
987
Note: This will run in its own forked process."""
1473
988
1474
989
def handle(self):
1475
with contextlib.closing(self.server.child_pipe) as child_pipe:
1476
logger.info("TCP connection from: %s",
1477
unicode(self.client_address))
1478
logger.debug("Pipe FD: %d",
1479
self.server.child_pipe.fileno())
1480
990
logger.info(u"TCP connection from: %s",
991
unicode(self.client_address))
992
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
993
# Open IPC pipe to parent process
994
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1481
995
session = (gnutls.connection
1482
996
.ClientSession(self.request,
1483
997
gnutls.connection
1484
998
.X509Credentials()))
1485
999
1000
line = self.request.makefile().readline()
1001
logger.debug(u"Protocol version: %r", line)
1002
try:
1003
if int(line.strip().split()[0]) > 1:
1004
raise RuntimeError
1005
except (ValueError, IndexError, RuntimeError), error:
1006
logger.error(u"Unknown protocol version: %s", error)
1007
return
1008
1486
1009
# Note: gnutls.connection.X509Credentials is really a
1487
1010
# generic GnuTLS certificate credentials object so long as
1488
1011
# no X.509 keys are added to it. Therefore, we can use it
1489
1012
# here despite using OpenPGP certificates.
1490
1013
1491
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1492
# "+AES-256-CBC", "+SHA1",
1493
# "+COMP-NULL", "+CTYPE-OPENPGP",
1494
# "+DHE-DSS"))
1014
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1015
# u"+AES-256-CBC", u"+SHA1",
1016
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1017
# u"+DHE-DSS"))
1495
1018
# Use a fallback default, since this MUST be set.
1496
1019
priority = self.server.gnutls_priority
1497
1020
if priority is None:
1498
priority = "NORMAL"
1021
priority = u"NORMAL"
1499
1022
(gnutls.library.functions
1500
1023
.gnutls_priority_set_direct(session._c_object,
1501
1024
priority, None))
1502
1025
1503
# Start communication using the Mandos protocol
1504
# Get protocol number
1505
line = self.request.makefile().readline()
1506
logger.debug("Protocol version: %r", line)
1507
try:
1508
if int(line.strip().split()[0]) > 1:
1509
raise RuntimeError
1510
except (ValueError, IndexError, RuntimeError) as error:
1511
logger.error("Unknown protocol version: %s", error)
1512
return
1513
1514
# Start GnuTLS connection
1515
1026
try:
1516
1027
session.handshake()
1517
except gnutls.errors.GNUTLSError as error:
1518
logger.warning("Handshake failed: %s", error)
1028
except gnutls.errors.GNUTLSError, error:
1029
logger.warning(u"Handshake failed: %s", error)
1519
1030
# Do not run session.bye() here: the session is not
1520
1031
# established. Just abandon the request.
1521
1032
return
1522
logger.debug("Handshake succeeded")
1523
1524
approval_required = False
1033
logger.debug(u"Handshake succeeded")
1525
1034
try:
1526
try:
1527
fpr = self.fingerprint(self.peer_certificate
1528
(session))
1529
except (TypeError,
1530
gnutls.errors.GNUTLSError) as error:
1531
logger.warning("Bad certificate: %s", error)
1532
return
1533
logger.debug("Fingerprint: %s", fpr)
1534
1535
try:
1536
client = ProxyClient(child_pipe, fpr,
1537
self.client_address)
1538
except KeyError:
1539
return
1540
1541
if self.server.use_dbus:
1542
# Emit D-Bus signal
1543
client.NewRequest(str(self.client_address))
1544
1545
if client.approval_delay:
1546
delay = client.approval_delay
1547
client.approvals_pending += 1
1548
approval_required = True
1549
1550
while True:
1551
if not client.enabled:
1552
logger.info("Client %s is disabled",
1553
client.name)
1554
if self.server.use_dbus:
1555
# Emit D-Bus signal
1556
client.Rejected("Disabled")
1557
return
1558
1559
if client.approved or not client.approval_delay:
1560
#We are approved or approval is disabled
1561
break
1562
elif client.approved is None:
1563
logger.info("Client %s needs approval",
1564
client.name)
1565
if self.server.use_dbus:
1566
# Emit D-Bus signal
1567
client.NeedApproval(
1568
client.approval_delay_milliseconds(),
1569
client.approved_by_default)
1570
else:
1571
logger.warning("Client %s was not approved",
1572
client.name)
1573
if self.server.use_dbus:
1574
# Emit D-Bus signal
1575
client.Rejected("Denied")
1576
return
1577
1578
#wait until timeout or approved
1579
time = datetime.datetime.now()
1580
client.changedstate.acquire()
1581
(client.changedstate.wait
1582
(float(client.timedelta_to_milliseconds(delay)
1583
/ 1000)))
1584
client.changedstate.release()
1585
time2 = datetime.datetime.now()
1586
if (time2 - time) >= delay:
1587
if not client.approved_by_default:
1588
logger.warning("Client %s timed out while"
1589
" waiting for approval",
1590
client.name)
1591
if self.server.use_dbus:
1592
# Emit D-Bus signal
1593
client.Rejected("Approval timed out")
1594
return
1595
else:
1596
break
1597
else:
1598
delay -= time2 - time
1599
1600
sent_size = 0
1601
while sent_size < len(client.secret):
1602
try:
1603
sent = session.send(client.secret[sent_size:])
1604
except gnutls.errors.GNUTLSError as error:
1605
logger.warning("gnutls send failed")
1606
return
1607
logger.debug("Sent: %d, remaining: %d",
1608
sent, len(client.secret)
1609
- (sent_size + sent))
1610
sent_size += sent
1611
1612
logger.info("Sending secret to %s", client.name)
1613
# bump the timeout using extended_timeout
1614
client.checked_ok(client.extended_timeout)
1615
if self.server.use_dbus:
1616
# Emit D-Bus signal
1617
client.GotSecret()
1035
fpr = self.fingerprint(self.peer_certificate(session))
1036
except (TypeError, gnutls.errors.GNUTLSError), error:
1037
logger.warning(u"Bad certificate: %s", error)
1038
session.bye()
1039
return
1040
logger.debug(u"Fingerprint: %s", fpr)
1618
1041
1619
finally:
1620
if approval_required:
1621
client.approvals_pending -= 1
1622
try:
1623
session.bye()
1624
except gnutls.errors.GNUTLSError as error:
1625
logger.warning("GnuTLS bye failed")
1042
for c in self.server.clients:
1043
if c.fingerprint == fpr:
1044
client = c
1045
break
1046
else:
1047
ipc.write(u"NOTFOUND %s %s\n"
1048
% (fpr, unicode(self.client_address)))
1049
session.bye()
1050
return
1051
# Have to check if client.still_valid(), since it is
1052
# possible that the client timed out while establishing
1053
# the GnuTLS session.
1054
if not client.still_valid():
1055
ipc.write(u"INVALID %s\n" % client.name)
1056
session.bye()
1057
return
1058
ipc.write(u"SENDING %s\n" % client.name)
1059
sent_size = 0
1060
while sent_size < len(client.secret):
1061
sent = session.send(client.secret[sent_size:])
1062
logger.debug(u"Sent: %d, remaining: %d",
1063
sent, len(client.secret)
1064
- (sent_size + sent))
1065
sent_size += sent
1066
session.bye()
1626
1067
1627
1068
@staticmethod
1628
1069
def peer_certificate(session):
1638
1079
.gnutls_certificate_get_peers
1639
1080
(session._c_object, ctypes.byref(list_size)))
1640
1081
if not bool(cert_list) and list_size.value != 0:
1641
raise gnutls.errors.GNUTLSError("error getting peer"
1642
" certificate")
1082
raise gnutls.errors.GNUTLSError(u"error getting peer"
1083
u" certificate")
1643
1084
if list_size.value == 0:
1644
1085
return None
1645
1086
cert = cert_list[0]
1671
1112
if crtverify.value != 0:
1672
1113
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1673
1114
raise (gnutls.errors.CertificateSecurityError
1674
("Verify failed"))
1115
(u"Verify failed"))
1675
1116
# New buffer for the fingerprint
1676
1117
buf = ctypes.create_string_buffer(20)
1677
1118
buf_len = ctypes.c_size_t()
1684
1125
# Convert the buffer to a Python bytestring
1685
1126
fpr = ctypes.string_at(buf, buf_len.value)
1686
1127
# Convert the bytestring to hexadecimal notation
1687
hex_fpr = binascii.hexlify(fpr).upper()
1128
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1688
1129
return hex_fpr
1689
1130
1690
1131
1691
class MultiprocessingMixIn(object):
1692
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1693
def sub_process_main(self, request, address):
1694
try:
1695
self.finish_request(request, address)
1696
except Exception:
1697
self.handle_error(request, address)
1698
self.close_request(request)
1699
1700
def process_request(self, request, address):
1701
"""Start a new process to process the request."""
1702
proc = multiprocessing.Process(target = self.sub_process_main,
1703
args = (request,
1704
address))
1705
proc.start()
1706
return proc
1707
1708
1709
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1710
""" adds a pipe to the MixIn """
1132
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1133
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1711
1134
def process_request(self, request, client_address):
1712
1135
"""Overrides and wraps the original process_request().
1713
1136
1714
1137
This function creates a new pipe in self.pipe
1715
1138
"""
1716
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1717
1718
proc = MultiprocessingMixIn.process_request(self, request,
1719
client_address)
1720
self.child_pipe.close()
1721
self.add_pipe(parent_pipe, proc)
1722
1723
def add_pipe(self, parent_pipe, proc):
1139
self.pipe = os.pipe()
1140
super(ForkingMixInWithPipe,
1141
self).process_request(request, client_address)
1142
os.close(self.pipe[1]) # close write end
1143
self.add_pipe(self.pipe[0])
1144
def add_pipe(self, pipe):
1724
1145
"""Dummy function; override as necessary"""
1725
raise NotImplementedError
1726
1727
1728
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1146
os.close(pipe)
1147
1148
1149
class IPv6_TCPServer(ForkingMixInWithPipe,
1729
1150
socketserver.TCPServer, object):
1730
1151
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1731
1152
1747
1168
bind to an address or port if they were not specified."""
1748
1169
if self.interface is not None:
1749
1170
if SO_BINDTODEVICE is None:
1750
logger.error("SO_BINDTODEVICE does not exist;"
1751
" cannot bind to interface %s",
1171
logger.error(u"SO_BINDTODEVICE does not exist;"
1172
u" cannot bind to interface %s",
1752
1173
self.interface)
1753
1174
else:
1754
1175
try:
1755
1176
self.socket.setsockopt(socket.SOL_SOCKET,
1756
1177
SO_BINDTODEVICE,
1757
1178
str(self.interface
1758
+ '\0'))
1759
except socket.error as error:
1179
+ u'\0'))
1180
except socket.error, error:
1760
1181
if error[0] == errno.EPERM:
1761
logger.error("No permission to"
1762
" bind to interface %s",
1182
logger.error(u"No permission to"
1183
u" bind to interface %s",
1763
1184
self.interface)
1764
1185
elif error[0] == errno.ENOPROTOOPT:
1765
logger.error("SO_BINDTODEVICE not available;"
1766
" cannot bind to interface %s",
1186
logger.error(u"SO_BINDTODEVICE not available;"
1187
u" cannot bind to interface %s",
1767
1188
self.interface)
1768
1189
else:
1769
1190
raise
1771
1192
if self.server_address[0] or self.server_address[1]:
1772
1193
if not self.server_address[0]:
1773
1194
if self.address_family == socket.AF_INET6:
1774
any_address = "::" # in6addr_any
1195
any_address = u"::" # in6addr_any
1775
1196
else:
1776
1197
any_address = socket.INADDR_ANY
1777
1198
self.server_address = (any_address,
1804
1225
self.enabled = False
1805
1226
self.clients = clients
1806
1227
if self.clients is None:
1807
self.clients = {}
1228
self.clients = set()
1808
1229
self.use_dbus = use_dbus
1809
1230
self.gnutls_priority = gnutls_priority
1810
1231
IPv6_TCPServer.__init__(self, server_address,
1814
1235
def server_activate(self):
1815
1236
if self.enabled:
1816
1237
return socketserver.TCPServer.server_activate(self)
1817
1818
1238
def enable(self):
1819
1239
self.enabled = True
1820
1821
def add_pipe(self, parent_pipe, proc):
1240
def add_pipe(self, pipe):
1822
1241
# Call "handle_ipc" for both data and EOF events
1823
gobject.io_add_watch(parent_pipe.fileno(),
1824
gobject.IO_IN | gobject.IO_HUP,
1825
functools.partial(self.handle_ipc,
1826
parent_pipe =
1827
parent_pipe,
1828
proc = proc))
1829
1830
def handle_ipc(self, source, condition, parent_pipe=None,
1831
proc = None, client_object=None):
1242
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1243
self.handle_ipc)
1244
def handle_ipc(self, source, condition, file_objects={}):
1832
1245
condition_names = {
1833
gobject.IO_IN: "IN", # There is data to read.
1834
gobject.IO_OUT: "OUT", # Data can be written (without
1246
gobject.IO_IN: u"IN", # There is data to read.
1247
gobject.IO_OUT: u"OUT", # Data can be written (without
1835
1248
# blocking).
1836
gobject.IO_PRI: "PRI", # There is urgent data to read.
1837
gobject.IO_ERR: "ERR", # Error condition.
1838
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1249
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1250
gobject.IO_ERR: u"ERR", # Error condition.
1251
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1839
1252
# broken, usually for pipes and
1840
1253
# sockets).
1841
1254
}
1843
1256
for cond, name in
1844
1257
condition_names.iteritems()
1845
1258
if cond & condition)
1846
# error, or the other end of multiprocessing.Pipe has closed
1847
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1848
# Wait for other process to exit
1849
proc.join()
1850
return False
1851
1852
# Read a request from the child
1853
request = parent_pipe.recv()
1854
command = request[0]
1855
1856
if command == 'init':
1857
fpr = request[1]
1858
address = request[2]
1859
1860
for c in self.clients.itervalues():
1861
if c.fingerprint == fpr:
1862
client = c
1863
break
1864
else:
1865
logger.info("Client not found for fingerprint: %s, ad"
1866
"dress: %s", fpr, address)
1867
if self.use_dbus:
1868
# Emit D-Bus signal
1869
mandos_dbus_service.ClientNotFound(fpr,
1870
address[0])
1871
parent_pipe.send(False)
1872
return False
1873
1874
gobject.io_add_watch(parent_pipe.fileno(),
1875
gobject.IO_IN | gobject.IO_HUP,
1876
functools.partial(self.handle_ipc,
1877
parent_pipe =
1878
parent_pipe,
1879
proc = proc,
1880
client_object =
1881
client))
1882
parent_pipe.send(True)
1883
# remove the old hook in favor of the new above hook on
1884
# same fileno
1885
return False
1886
if command == 'funcall':
1887
funcname = request[1]
1888
args = request[2]
1889
kwargs = request[3]
1890
1891
parent_pipe.send(('data', getattr(client_object,
1892
funcname)(*args,
1893
**kwargs)))
1894
1895
if command == 'getattr':
1896
attrname = request[1]
1897
if callable(client_object.__getattribute__(attrname)):
1898
parent_pipe.send(('function',))
1899
else:
1900
parent_pipe.send(('data', client_object
1901
.__getattribute__(attrname)))
1902
1903
if command == 'setattr':
1904
attrname = request[1]
1905
value = request[2]
1906
setattr(client_object, attrname, value)
1907
1259
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1260
conditions_string)
1261
1262
# Turn the pipe file descriptor into a Python file object
1263
if source not in file_objects:
1264
file_objects[source] = os.fdopen(source, u"r", 1)
1265
1266
# Read a line from the file object
1267
cmdline = file_objects[source].readline()
1268
if not cmdline: # Empty line means end of file
1269
# close the IPC pipe
1270
file_objects[source].close()
1271
del file_objects[source]
1272
1273
# Stop calling this function
1274
return False
1275
1276
logger.debug(u"IPC command: %r", cmdline)
1277
1278
# Parse and act on command
1279
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1280
1281
if cmd == u"NOTFOUND":
1282
logger.warning(u"Client not found for fingerprint: %s",
1283
args)
1284
if self.use_dbus:
1285
# Emit D-Bus signal
1286
mandos_dbus_service.ClientNotFound(args)
1287
elif cmd == u"INVALID":
1288
for client in self.clients:
1289
if client.name == args:
1290
logger.warning(u"Client %s is invalid", args)
1291
if self.use_dbus:
1292
# Emit D-Bus signal
1293
client.Rejected()
1294
break
1295
else:
1296
logger.error(u"Unknown client %s is invalid", args)
1297
elif cmd == u"SENDING":
1298
for client in self.clients:
1299
if client.name == args:
1300
logger.info(u"Sending secret to %s", client.name)
1301
client.checked_ok()
1302
if self.use_dbus:
1303
# Emit D-Bus signal
1304
client.GotSecret()
1305
break
1306
else:
1307
logger.error(u"Sending secret to unknown client %s",
1308
args)
1309
else:
1310
logger.error(u"Unknown IPC command: %r", cmdline)
1311
1312
# Keep calling this function
1908
1313
return True
1909
1314
1910
1315
1911
1316
def string_to_delta(interval):
1912
1317
"""Parse a string and return a datetime.timedelta
1913
1318
1914
>>> string_to_delta('7d')
1319
>>> string_to_delta(u'7d')
1915
1320
datetime.timedelta(7)
1916
>>> string_to_delta('60s')
1321
>>> string_to_delta(u'60s')
1917
1322
datetime.timedelta(0, 60)
1918
>>> string_to_delta('60m')
1323
>>> string_to_delta(u'60m')
1919
1324
datetime.timedelta(0, 3600)
1920
>>> string_to_delta('24h')
1325
>>> string_to_delta(u'24h')
1921
1326
datetime.timedelta(1)
1922
>>> string_to_delta('1w')
1327
>>> string_to_delta(u'1w')
1923
1328
datetime.timedelta(7)
1924
>>> string_to_delta('5m 30s')
1329
>>> string_to_delta(u'5m 30s')
1925
1330
datetime.timedelta(0, 330)
1926
1331
"""
1927
1332
timevalue = datetime.timedelta(0)
1929
1334
try:
1930
1335
suffix = unicode(s[-1])
1931
1336
value = int(s[:-1])
1932
if suffix == "d":
1337
if suffix == u"d":
1933
1338
delta = datetime.timedelta(value)
1934
elif suffix == "s":
1339
elif suffix == u"s":
1935
1340
delta = datetime.timedelta(0, value)
1936
elif suffix == "m":
1341
elif suffix == u"m":
1937
1342
delta = datetime.timedelta(0, 0, 0, 0, value)
1938
elif suffix == "h":
1343
elif suffix == u"h":
1939
1344
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1940
elif suffix == "w":
1345
elif suffix == u"w":
1941
1346
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1942
1347
else:
1943
raise ValueError("Unknown suffix %r" % suffix)
1944
except (ValueError, IndexError) as e:
1945
raise ValueError(*(e.args))
1348
raise ValueError
1349
except (ValueError, IndexError):
1350
raise ValueError
1946
1351
timevalue += delta
1947
1352
return timevalue
1948
1353
1949
1354
1355
def if_nametoindex(interface):
1356
"""Call the C function if_nametoindex(), or equivalent
1357
1358
Note: This function cannot accept a unicode string."""
1359
global if_nametoindex
1360
try:
1361
if_nametoindex = (ctypes.cdll.LoadLibrary
1362
(ctypes.util.find_library(u"c"))
1363
.if_nametoindex)
1364
except (OSError, AttributeError):
1365
logger.warning(u"Doing if_nametoindex the hard way")
1366
def if_nametoindex(interface):
1367
"Get an interface index the hard way, i.e. using fcntl()"
1368
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1369
with closing(socket.socket()) as s:
1370
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1371
struct.pack(str(u"16s16x"),
1372
interface))
1373
interface_index = struct.unpack(str(u"I"),
1374
ifreq[16:20])[0]
1375
return interface_index
1376
return if_nametoindex(interface)
1377
1378
1950
1379
def daemon(nochdir = False, noclose = False):
1951
1380
"""See daemon(3). Standard BSD Unix function.
1952
1381
1955
1384
sys.exit()
1956
1385
os.setsid()
1957
1386
if not nochdir:
1958
os.chdir("/")
1387
os.chdir(u"/")
1959
1388
if os.fork():
1960
1389
sys.exit()
1961
1390
if not noclose:
1963
1392
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1964
1393
if not stat.S_ISCHR(os.fstat(null).st_mode):
1965
1394
raise OSError(errno.ENODEV,
1966
"%s not a character device"
1395
u"%s not a character device"
1967
1396
% os.path.devnull)
1968
1397
os.dup2(null, sys.stdin.fileno())
1969
1398
os.dup2(null, sys.stdout.fileno())
1977
1406
##################################################################
1978
1407
# Parsing of options, both command line and config file
1979
1408
1980
parser = argparse.ArgumentParser()
1981
parser.add_argument("-v", "--version", action="version",
1982
version = "%%(prog)s %s" % version,
1983
help="show version number and exit")
1984
parser.add_argument("-i", "--interface", metavar="IF",
1985
help="Bind to interface IF")
1986
parser.add_argument("-a", "--address",
1987
help="Address to listen for requests on")
1988
parser.add_argument("-p", "--port", type=int,
1989
help="Port number to receive requests on")
1990
parser.add_argument("--check", action="store_true",
1991
help="Run self-test")
1992
parser.add_argument("--debug", action="store_true",
1993
help="Debug mode; run in foreground and log"
1994
" to terminal")
1995
parser.add_argument("--debuglevel", metavar="LEVEL",
1996
help="Debug level for stdout output")
1997
parser.add_argument("--priority", help="GnuTLS"
1998
" priority string (see GnuTLS documentation)")
1999
parser.add_argument("--servicename",
2000
metavar="NAME", help="Zeroconf service name")
2001
parser.add_argument("--configdir",
2002
default="/etc/mandos", metavar="DIR",
2003
help="Directory to search for configuration"
2004
" files")
2005
parser.add_argument("--no-dbus", action="store_false",
2006
dest="use_dbus", help="Do not provide D-Bus"
2007
" system bus interface")
2008
parser.add_argument("--no-ipv6", action="store_false",
2009
dest="use_ipv6", help="Do not use IPv6")
2010
parser.add_argument("--no-restore", action="store_false",
2011
dest="restore", help="Do not restore stored"
2012
" state")
2013
parser.add_argument("--statedir", metavar="DIR",
2014
help="Directory to save/restore state in")
2015
2016
options = parser.parse_args()
1409
parser = optparse.OptionParser(version = "%%prog %s" % version)
1410
parser.add_option("-i", u"--interface", type=u"string",
1411
metavar="IF", help=u"Bind to interface IF")
1412
parser.add_option("-a", u"--address", type=u"string",
1413
help=u"Address to listen for requests on")
1414
parser.add_option("-p", u"--port", type=u"int",
1415
help=u"Port number to receive requests on")
1416
parser.add_option("--check", action=u"store_true",
1417
help=u"Run self-test")
1418
parser.add_option("--debug", action=u"store_true",
1419
help=u"Debug mode; run in foreground and log to"
1420
u" terminal")
1421
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1422
u" priority string (see GnuTLS documentation)")
1423
parser.add_option("--servicename", type=u"string",
1424
metavar=u"NAME", help=u"Zeroconf service name")
1425
parser.add_option("--configdir", type=u"string",
1426
default=u"/etc/mandos", metavar=u"DIR",
1427
help=u"Directory to search for configuration"
1428
u" files")
1429
parser.add_option("--no-dbus", action=u"store_false",
1430
dest=u"use_dbus", help=u"Do not provide D-Bus"
1431
u" system bus interface")
1432
parser.add_option("--no-ipv6", action=u"store_false",
1433
dest=u"use_ipv6", help=u"Do not use IPv6")
1434
options = parser.parse_args()[0]
2017
1435
2018
1436
if options.check:
2019
1437
import doctest
2021
1439
sys.exit()
2022
1440
2023
1441
# Default values for config file for server-global settings
2024
server_defaults = { "interface": "",
2025
"address": "",
2026
"port": "",
2027
"debug": "False",
2028
"priority":
2029
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2030
"servicename": "Mandos",
2031
"use_dbus": "True",
2032
"use_ipv6": "True",
2033
"debuglevel": "",
2034
"restore": "True",
2035
"statedir": "/var/lib/mandos"
1442
server_defaults = { u"interface": u"",
1443
u"address": u"",
1444
u"port": u"",
1445
u"debug": u"False",
1446
u"priority":
1447
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1448
u"servicename": u"Mandos",
1449
u"use_dbus": u"True",
1450
u"use_ipv6": u"True",
2036
1451
}
2037
1452
2038
1453
# Parse config file for server-global settings
2039
1454
server_config = configparser.SafeConfigParser(server_defaults)
2040
1455
del server_defaults
2041
1456
server_config.read(os.path.join(options.configdir,
2042
"mandos.conf"))
1457
u"mandos.conf"))
2043
1458
# Convert the SafeConfigParser object to a dict
2044
1459
server_settings = server_config.defaults()
2045
1460
# Use the appropriate methods on the non-string config options
2046
for option in ("debug", "use_dbus", "use_ipv6"):
2047
server_settings[option] = server_config.getboolean("DEFAULT",
1461
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1462
server_settings[option] = server_config.getboolean(u"DEFAULT",
2048
1463
option)
2049
1464
if server_settings["port"]:
2050
server_settings["port"] = server_config.getint("DEFAULT",
2051
"port")
1465
server_settings["port"] = server_config.getint(u"DEFAULT",
1466
u"port")
2052
1467
del server_config
2053
1468
2054
1469
# Override the settings from the config file with command line
2055
1470
# options, if set.
2056
for option in ("interface", "address", "port", "debug",
2057
"priority", "servicename", "configdir",
2058
"use_dbus", "use_ipv6", "debuglevel", "restore",
2059
"statedir"):
1471
for option in (u"interface", u"address", u"port", u"debug",
1472
u"priority", u"servicename", u"configdir",
1473
u"use_dbus", u"use_ipv6"):
2060
1474
value = getattr(options, option)
2061
1475
if value is not None:
2062
1476
server_settings[option] = value
2070
1484
##################################################################
2071
1485
2072
1486
# For convenience
2073
debug = server_settings["debug"]
2074
debuglevel = server_settings["debuglevel"]
2075
use_dbus = server_settings["use_dbus"]
2076
use_ipv6 = server_settings["use_ipv6"]
2077
stored_state_path = os.path.join(server_settings["statedir"],
2078
stored_state_file)
2079
2080
if debug:
2081
initlogger(logging.DEBUG)
2082
else:
2083
if not debuglevel:
2084
initlogger()
2085
else:
2086
level = getattr(logging, debuglevel.upper())
2087
initlogger(level)
2088
2089
if server_settings["servicename"] != "Mandos":
1487
debug = server_settings[u"debug"]
1488
use_dbus = server_settings[u"use_dbus"]
1489
use_ipv6 = server_settings[u"use_ipv6"]
1490
1491
if not debug:
1492
syslogger.setLevel(logging.WARNING)
1493
console.setLevel(logging.WARNING)
1494
1495
if server_settings[u"servicename"] != u"Mandos":
2090
1496
syslogger.setFormatter(logging.Formatter
2091
('Mandos (%s) [%%(process)d]:'
2092
' %%(levelname)s: %%(message)s'
2093
% server_settings["servicename"]))
1497
(u'Mandos (%s) [%%(process)d]:'
1498
u' %%(levelname)s: %%(message)s'
1499
% server_settings[u"servicename"]))
2094
1500
2095
1501
# Parse config file with clients
2096
client_config = configparser.SafeConfigParser(Client.client_defaults)
2097
client_config.read(os.path.join(server_settings["configdir"],
2098
"clients.conf"))
1502
client_defaults = { u"timeout": u"1h",
1503
u"interval": u"5m",
1504
u"checker": u"fping -q -- %%(host)s",
1505
u"host": u"",
1506
}
1507
client_config = configparser.SafeConfigParser(client_defaults)
1508
client_config.read(os.path.join(server_settings[u"configdir"],
1509
u"clients.conf"))
2099
1510
2100
1511
global mandos_dbus_service
2101
1512
mandos_dbus_service = None
2102
1513
2103
tcp_server = MandosServer((server_settings["address"],
2104
server_settings["port"]),
1514
tcp_server = MandosServer((server_settings[u"address"],
1515
server_settings[u"port"]),
2105
1516
ClientHandler,
2106
interface=(server_settings["interface"]
2107
or None),
1517
interface=server_settings[u"interface"],
2108
1518
use_ipv6=use_ipv6,
2109
1519
gnutls_priority=
2110
server_settings["priority"],
1520
server_settings[u"priority"],
2111
1521
use_dbus=use_dbus)
2112
if not debug:
2113
pidfilename = "/var/run/mandos.pid"
2114
try:
2115
pidfile = open(pidfilename, "w")
2116
except IOError:
2117
logger.error("Could not open file %r", pidfilename)
1522
pidfilename = u"/var/run/mandos.pid"
1523
try:
1524
pidfile = open(pidfilename, u"w")
1525
except IOError:
1526
logger.error(u"Could not open file %r", pidfilename)
2118
1527
2119
1528
try:
2120
uid = pwd.getpwnam("_mandos").pw_uid
2121
gid = pwd.getpwnam("_mandos").pw_gid
1529
uid = pwd.getpwnam(u"_mandos").pw_uid
1530
gid = pwd.getpwnam(u"_mandos").pw_gid
2122
1531
except KeyError:
2123
1532
try:
2124
uid = pwd.getpwnam("mandos").pw_uid
2125
gid = pwd.getpwnam("mandos").pw_gid
1533
uid = pwd.getpwnam(u"mandos").pw_uid
1534
gid = pwd.getpwnam(u"mandos").pw_gid
2126
1535
except KeyError:
2127
1536
try:
2128
uid = pwd.getpwnam("nobody").pw_uid
2129
gid = pwd.getpwnam("nobody").pw_gid
1537
uid = pwd.getpwnam(u"nobody").pw_uid
1538
gid = pwd.getpwnam(u"nobody").pw_gid
2130
1539
except KeyError:
2131
1540
uid = 65534
2132
1541
gid = 65534
2133
1542
try:
2134
1543
os.setgid(gid)
2135
1544
os.setuid(uid)
2136
except OSError as error:
1545
except OSError, error:
2137
1546
if error[0] != errno.EPERM:
2138
1547
raise error
2139
1548
1549
# Enable all possible GnuTLS debugging
2140
1550
if debug:
2141
# Enable all possible GnuTLS debugging
2142
2143
1551
# "Use a log level over 10 to enable all debugging options."
2144
1552
# - GnuTLS manual
2145
1553
gnutls.library.functions.gnutls_global_set_log_level(11)
2146
1554
2147
1555
@gnutls.library.types.gnutls_log_func
2148
1556
def debug_gnutls(level, string):
2149
logger.debug("GnuTLS: %s", string[:-1])
1557
logger.debug(u"GnuTLS: %s", string[:-1])
2150
1558
2151
1559
(gnutls.library.functions
2152
1560
.gnutls_global_set_log_function(debug_gnutls))
2153
2154
# Redirect stdin so all checkers get /dev/null
2155
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2156
os.dup2(null, sys.stdin.fileno())
2157
if null > 2:
2158
os.close(null)
2159
else:
2160
# No console logging
2161
logger.removeHandler(console)
2162
2163
# Need to fork before connecting to D-Bus
2164
if not debug:
2165
# Close all input and output, do double fork, etc.
2166
daemon()
2167
1561
2168
1562
global main_loop
2169
1563
# From the Avahi example code
2172
1566
bus = dbus.SystemBus()
2173
1567
# End of Avahi example code
2174
1568
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
1569
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2186
1570
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)
1571
service = AvahiService(name = server_settings[u"servicename"],
1572
servicetype = u"_mandos._tcp",
1573
protocol = protocol, bus = bus)
2191
1574
if server_settings["interface"]:
2192
1575
service.interface = (if_nametoindex
2193
(str(server_settings["interface"])))
2194
2195
global multiprocessing_manager
2196
multiprocessing_manager = multiprocessing.Manager()
1576
(str(server_settings[u"interface"])))
2197
1577
2198
1578
client_class = Client
2199
1579
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
2220
with PGPEngine() as pgp:
2221
for client_name, client in clients_data.iteritems():
2222
# Decide which value to use after restoring saved state.
2223
# We have three different values: Old config file,
2224
# new config file, and saved state.
2225
# New config value takes precedence if it differs from old
2226
# config value, otherwise use saved state.
2227
for name, value in client_settings[client_name].items():
2228
try:
2229
# For each value in new config, check if it
2230
# differs from the old config value (Except for
2231
# the "secret" attribute)
2232
if (name != "secret" and
2233
value != old_client_settings[client_name]
2234
[name]):
2235
client[name] = value
2236
except KeyError:
2237
pass
2238
2239
# Clients who has passed its expire date can still be
2240
# enabled if its last checker was successful. Clients
2241
# whose checker failed before we stored its state is
2242
# assumed to have failed all checkers during downtime.
2243
if client["enabled"]:
2244
if datetime.datetime.utcnow() >= client["expires"]:
2245
if not client["last_checked_ok"]:
2246
logger.warning(
2247
"disabling client {0} - Client never "
2248
"performed a successfull checker"
2249
.format(client["name"]))
2250
client["enabled"] = False
2251
elif client["last_checker_status"] != 0:
2252
logger.warning(
2253
"disabling client {0} - Client "
2254
"last checker failed with error code {1}"
2255
.format(client["name"],
2256
client["last_checker_status"]))
2257
client["enabled"] = False
2258
else:
2259
client["expires"] = (datetime.datetime
2260
.utcnow()
2261
+ client["timeout"])
2262
2263
try:
2264
client["secret"] = (
2265
pgp.decrypt(client["encrypted_secret"],
2266
client_settings[client_name]
2267
["secret"]))
2268
except PGPError:
2269
# If decryption fails, we use secret from new settings
2270
logger.debug("Failed to decrypt {0} old secret"
2271
.format(client_name))
2272
client["secret"] = (
2273
client_settings[client_name]["secret"])
2274
2275
2276
# Add/remove clients based on new changes made to config
2277
for client_name in set(old_client_settings) - set(client_settings):
2278
del clients_data[client_name]
2279
for client_name in set(client_settings) - set(old_client_settings):
2280
clients_data[client_name] = client_settings[client_name]
2281
2282
# Create clients all clients
2283
for client_name, client in clients_data.iteritems():
2284
tcp_server.clients[client_name] = client_class(
2285
name = client_name, settings = client)
2286
1580
client_class = functools.partial(ClientDBus, bus = bus)
1581
tcp_server.clients.update(set(
1582
client_class(name = section,
1583
config= dict(client_config.items(section)))
1584
for section in client_config.sections()))
2287
1585
if not tcp_server.clients:
2288
logger.warning("No clients defined")
1586
logger.warning(u"No clients defined")
1587
1588
if debug:
1589
# Redirect stdin so all checkers get /dev/null
1590
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1591
os.dup2(null, sys.stdin.fileno())
1592
if null > 2:
1593
os.close(null)
1594
else:
1595
# No console logging
1596
logger.removeHandler(console)
1597
# Close all input and output, do double fork, etc.
1598
daemon()
1599
1600
try:
1601
with closing(pidfile):
1602
pid = os.getpid()
1603
pidfile.write(str(pid) + "\n")
1604
del pidfile
1605
except IOError:
1606
logger.error(u"Could not write to file %r with PID %d",
1607
pidfilename, pid)
1608
except NameError:
1609
# "pidfile" was never created
1610
pass
1611
del pidfilename
1612
1613
def cleanup():
1614
"Cleanup function; run on exit"
1615
service.cleanup()
2289
1616
1617
while tcp_server.clients:
1618
client = tcp_server.clients.pop()
1619
client.disable_hook = None
1620
client.disable()
1621
1622
atexit.register(cleanup)
1623
2290
1624
if not debug:
2291
try:
2292
with pidfile:
2293
pid = os.getpid()
2294
pidfile.write(str(pid) + "\n".encode("utf-8"))
2295
del pidfile
2296
except IOError:
2297
logger.error("Could not write to file %r with PID %d",
2298
pidfilename, pid)
2299
except NameError:
2300
# "pidfile" was never created
2301
pass
2302
del pidfilename
2303
1625
signal.signal(signal.SIGINT, signal.SIG_IGN)
2304
2305
1626
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2306
1627
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2307
1628
2309
1630
class MandosDBusService(dbus.service.Object):
2310
1631
"""A D-Bus proxy object"""
2311
1632
def __init__(self):
2312
dbus.service.Object.__init__(self, bus, "/")
2313
_interface = "se.recompile.Mandos"
2314
2315
@dbus.service.signal(_interface, signature="o")
2316
def ClientAdded(self, objpath):
2317
"D-Bus signal"
2318
pass
2319
2320
@dbus.service.signal(_interface, signature="ss")
2321
def ClientNotFound(self, fingerprint, address):
2322
"D-Bus signal"
2323
pass
2324
2325
@dbus.service.signal(_interface, signature="os")
1633
dbus.service.Object.__init__(self, bus, u"/")
1634
_interface = u"se.bsnet.fukt.Mandos"
1635
1636
@dbus.service.signal(_interface, signature=u"oa{sv}")
1637
def ClientAdded(self, objpath, properties):
1638
"D-Bus signal"
1639
pass
1640
1641
@dbus.service.signal(_interface, signature=u"s")
1642
def ClientNotFound(self, fingerprint):
1643
"D-Bus signal"
1644
pass
1645
1646
@dbus.service.signal(_interface, signature=u"os")
2326
1647
def ClientRemoved(self, objpath, name):
2327
1648
"D-Bus signal"
2328
1649
pass
2329
1650
2330
@dbus.service.method(_interface, out_signature="ao")
1651
@dbus.service.method(_interface, out_signature=u"ao")
2331
1652
def GetAllClients(self):
2332
1653
"D-Bus method"
2333
1654
return dbus.Array(c.dbus_object_path
2334
for c in
2335
tcp_server.clients.itervalues())
1655
for c in tcp_server.clients)
2336
1656
2337
1657
@dbus.service.method(_interface,
2338
out_signature="a{oa{sv}}")
1658
out_signature=u"a{oa{sv}}")
2339
1659
def GetAllClientsWithProperties(self):
2340
1660
"D-Bus method"
2341
1661
return dbus.Dictionary(
2342
((c.dbus_object_path, c.GetAll(""))
2343
for c in tcp_server.clients.itervalues()),
2344
signature="oa{sv}")
1662
((c.dbus_object_path, c.GetAll(u""))
1663
for c in tcp_server.clients),
1664
signature=u"oa{sv}")
2345
1665
2346
@dbus.service.method(_interface, in_signature="o")
1666
@dbus.service.method(_interface, in_signature=u"o")
2347
1667
def RemoveClient(self, object_path):
2348
1668
"D-Bus method"
2349
for c in tcp_server.clients.itervalues():
1669
for c in tcp_server.clients:
2350
1670
if c.dbus_object_path == object_path:
2351
del tcp_server.clients[c.name]
1671
tcp_server.clients.remove(c)
2352
1672
c.remove_from_connection()
2353
1673
# Don't signal anything except ClientRemoved
2354
c.disable(quiet=True)
1674
c.disable(signal=False)
2355
1675
# Emit D-Bus signal
2356
1676
self.ClientRemoved(object_path, c.name)
2357
1677
return
2358
raise KeyError(object_path)
1678
raise KeyError
2359
1679
2360
1680
del _interface
2361
1681
2362
class MandosDBusServiceTransitional(MandosDBusService):
2363
__metaclass__ = AlternateDBusNamesMetaclass
2364
mandos_dbus_service = MandosDBusServiceTransitional()
2365
2366
def cleanup():
2367
"Cleanup function; run on exit"
2368
service.cleanup()
2369
2370
multiprocessing.active_children()
2371
if not (tcp_server.clients or client_settings):
2372
return
2373
2374
# Store client before exiting. Secrets are encrypted with key
2375
# based on what config file has. If config file is
2376
# removed/edited, old secret will thus be unrecovable.
2377
clients = {}
2378
with PGPEngine() as pgp:
2379
for client in tcp_server.clients.itervalues():
2380
key = client_settings[client.name]["secret"]
2381
client.encrypted_secret = pgp.encrypt(client.secret,
2382
key)
2383
client_dict = {}
2384
2385
# A list of attributes that can not be pickled
2386
# + secret.
2387
exclude = set(("bus", "changedstate", "secret",
2388
"checker"))
2389
for name, typ in (inspect.getmembers
2390
(dbus.service.Object)):
2391
exclude.add(name)
2392
2393
client_dict["encrypted_secret"] = (client
2394
.encrypted_secret)
2395
for attr in client.client_structure:
2396
if attr not in exclude:
2397
client_dict[attr] = getattr(client, attr)
2398
2399
clients[client.name] = client_dict
2400
del client_settings[client.name]["secret"]
2401
2402
try:
2403
with os.fdopen(os.open(stored_state_path,
2404
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2405
0600), "wb") as stored_state:
2406
pickle.dump((clients, client_settings), stored_state)
2407
except (IOError, OSError) as e:
2408
logger.warning("Could not save persistent state: {0}"
2409
.format(e))
2410
if e.errno not in (errno.ENOENT, errno.EACCES):
2411
raise
2412
2413
# Delete all clients, and settings from config
2414
while tcp_server.clients:
2415
name, client = tcp_server.clients.popitem()
2416
if use_dbus:
2417
client.remove_from_connection()
2418
# Don't signal anything except ClientRemoved
2419
client.disable(quiet=True)
2420
if use_dbus:
2421
# Emit D-Bus signal
2422
mandos_dbus_service.ClientRemoved(client
2423
.dbus_object_path,
2424
client.name)
2425
client_settings.clear()
2426
2427
atexit.register(cleanup)
2428
2429
for client in tcp_server.clients.itervalues():
1682
mandos_dbus_service = MandosDBusService()
1683
1684
for client in tcp_server.clients:
2430
1685
if use_dbus:
2431
1686
# Emit D-Bus signal
2432
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2433
# Need to initiate checking of clients
2434
if client.enabled:
2435
client.init_checker()
1687
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1688
client.GetAll(u""))
1689
client.enable()
2436
1690
2437
1691
tcp_server.enable()
2438
1692
tcp_server.server_activate()
2440
1694
# Find out what port we got
2441
1695
service.port = tcp_server.socket.getsockname()[1]
2442
1696
if use_ipv6:
2443
logger.info("Now listening on address %r, port %d,"
1697
logger.info(u"Now listening on address %r, port %d,"
2444
1698
" flowinfo %d, scope_id %d"
2445
1699
% tcp_server.socket.getsockname())
2446
1700
else: # IPv4
2447
logger.info("Now listening on address %r, port %d"
1701
logger.info(u"Now listening on address %r, port %d"
2448
1702
% tcp_server.socket.getsockname())
2449
1703
2450
1704
#service.interface = tcp_server.socket.getsockname()[3]
2453
1707
# From the Avahi example code
2454
1708
try:
2455
1709
service.activate()
2456
except dbus.exceptions.DBusException as error:
2457
logger.critical("DBusException: %s", error)
2458
cleanup()
1710
except dbus.exceptions.DBusException, error:
1711
logger.critical(u"DBusException: %s", error)
2459
1712
sys.exit(1)
2460
1713
# End of Avahi example code
2461
1714
2464
1717
(tcp_server.handle_request
2465
1718
(*args[2:], **kwargs) or True))
2466
1719
2467
logger.debug("Starting main loop")
1720
logger.debug(u"Starting main loop")
2468
1721
main_loop.run()
2469
except AvahiError as error:
2470
logger.critical("AvahiError: %s", error)
2471
cleanup()
1722
except AvahiError, error:
1723
logger.critical(u"AvahiError: %s", error)
2472
1724
sys.exit(1)
2473
1725
except KeyboardInterrupt:
2474
1726
if debug:
2475
print("", file=sys.stderr)
2476
logger.debug("Server received KeyboardInterrupt")
2477
logger.debug("Server exiting")
2478
# Must run before the D-Bus bus name gets deregistered
2479
cleanup()
1727
print >> sys.stderr
1728
logger.debug(u"Server received KeyboardInterrupt")
1729
logger.debug(u"Server exiting")
2480
1730
2481
1731
if __name__ == '__main__':
2482
1732
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0