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- Committer: teddy at recompile
- Date: 2012-01-01 17:38:33 UTC
- Revision ID: teddy@recompile.se-20120101173833-ai39bif1w0ftuyyh
* Makefile (install-server): Add intro(8mandos) man page.
* network-hooks.d/bridge: Add copyright info and year.
* network-hooks.d/openvpn: - '' -
* network-hooks.d/wireless: - '' -
* network-hooks.d/bridge: Add copyright info and year.
* network-hooks.d/openvpn: - '' -
* network-hooks.d/wireless: - '' -
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
35
36
36
37
import SocketServer as socketserver
37
38
import socket
38
import optparse
39
import argparse
39
40
import datetime
40
41
import errno
41
42
import gnutls.crypto
55
56
import logging
56
57
import logging.handlers
57
58
import pwd
58
from contextlib import closing
59
import contextlib
59
60
import struct
60
61
import fcntl
61
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
67
import tempfile
62
68
63
69
import dbus
64
70
import dbus.service
69
75
import ctypes.util
70
76
import xml.dom.minidom
71
77
import inspect
78
import GnuPGInterface
72
79
73
80
try:
74
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
85
except ImportError:
79
86
SO_BINDTODEVICE = None
80
87
81
82
version = "1.0.12"
83
84
logger = logging.Logger(u'mandos')
88
version = "1.5.0"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
85
92
syslogger = (logging.handlers.SysLogHandler
86
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
87
address = "/dev/log"))
88
syslogger.setFormatter(logging.Formatter
89
(u'Mandos [%(process)d]: %(levelname)s:'
90
u' %(message)s'))
91
logger.addHandler(syslogger)
92
93
console = logging.StreamHandler()
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
u' %(levelname)s:'
96
u' %(message)s'))
97
logger.addHandler(console)
94
address = str("/dev/log")))
95
96
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
100
except (OSError, AttributeError):
101
def if_nametoindex(interface):
102
"Get an interface index the hard way, i.e. using fcntl()"
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
with contextlib.closing(socket.socket()) as s:
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
110
return interface_index
111
112
113
def initlogger(debug, level=logging.WARNING):
114
"""init logger and add loglevel"""
115
116
syslogger.setFormatter(logging.Formatter
117
('Mandos [%(process)d]: %(levelname)s:'
118
' %(message)s'))
119
logger.addHandler(syslogger)
120
121
if debug:
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
124
' [%(process)d]:'
125
' %(levelname)s:'
126
' %(message)s'))
127
logger.addHandler(console)
128
logger.setLevel(level)
129
130
131
class PGPError(Exception):
132
"""Exception if encryption/decryption fails"""
133
pass
134
135
136
class PGPEngine(object):
137
"""A simple class for OpenPGP symmetric encryption & decryption"""
138
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
147
148
def __enter__(self):
149
return self
150
151
def __exit__ (self, exc_type, exc_value, traceback):
152
self._cleanup()
153
return False
154
155
def __del__(self):
156
self._cleanup()
157
158
def _cleanup(self):
159
if self.tempdir is not None:
160
# Delete contents of tempdir
161
for root, dirs, files in os.walk(self.tempdir,
162
topdown = False):
163
for filename in files:
164
os.remove(os.path.join(root, filename))
165
for dirname in dirs:
166
os.rmdir(os.path.join(root, dirname))
167
# Remove tempdir
168
os.rmdir(self.tempdir)
169
self.tempdir = None
170
171
def password_encode(self, password):
172
# Passphrase can not be empty and can not contain newlines or
173
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
175
176
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
191
return ciphertext
192
193
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
208
return decrypted_plaintext
209
210
98
211
99
212
class AvahiError(Exception):
100
213
def __init__(self, value, *args, **kwargs):
116
229
Attributes:
117
230
interface: integer; avahi.IF_UNSPEC or an interface index.
118
231
Used to optionally bind to the specified interface.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
232
name: string; Example: 'Mandos'
233
type: string; Example: '_mandos._tcp'.
121
234
See <http://www.dns-sd.org/ServiceTypes.html>
122
235
port: integer; what port to announce
123
236
TXT: list of strings; TXT record for the service
132
245
"""
133
246
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
134
247
servicetype = None, port = None, TXT = None,
135
domain = u"", host = u"", max_renames = 32768,
248
domain = "", host = "", max_renames = 32768,
136
249
protocol = avahi.PROTO_UNSPEC, bus = None):
137
250
self.interface = interface
138
251
self.name = name
147
260
self.group = None # our entry group
148
261
self.server = None
149
262
self.bus = bus
263
self.entry_group_state_changed_match = None
150
264
def rename(self):
151
265
"""Derived from the Avahi example code"""
152
266
if self.rename_count >= self.max_renames:
153
logger.critical(u"No suitable Zeroconf service name found"
154
u" after %i retries, exiting.",
267
logger.critical("No suitable Zeroconf service name found"
268
" after %i retries, exiting.",
155
269
self.rename_count)
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
158
logger.info(u"Changing Zeroconf service name to %r ...",
159
unicode(self.name))
160
syslogger.setFormatter(logging.Formatter
161
(u'Mandos (%s) [%%(process)d]:'
162
u' %%(levelname)s: %%(message)s'
163
% self.name))
270
raise AvahiServiceError("Too many renames")
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
273
logger.info("Changing Zeroconf service name to %r ...",
274
self.name)
164
275
self.remove()
165
self.add()
276
try:
277
self.add()
278
except dbus.exceptions.DBusException as error:
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
166
282
self.rename_count += 1
167
283
def remove(self):
168
284
"""Derived from the Avahi example code"""
285
if self.entry_group_state_changed_match is not None:
286
self.entry_group_state_changed_match.remove()
287
self.entry_group_state_changed_match = None
169
288
if self.group is not None:
170
289
self.group.Reset()
171
290
def add(self):
172
291
"""Derived from the Avahi example code"""
292
self.remove()
173
293
if self.group is None:
174
294
self.group = dbus.Interface(
175
295
self.bus.get_object(avahi.DBUS_NAME,
176
296
self.server.EntryGroupNew()),
177
297
avahi.DBUS_INTERFACE_ENTRY_GROUP)
178
self.group.connect_to_signal('StateChanged',
179
self
180
.entry_group_state_changed)
181
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
298
self.entry_group_state_changed_match = (
299
self.group.connect_to_signal(
300
'StateChanged', self.entry_group_state_changed))
301
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
182
302
self.name, self.type)
183
303
self.group.AddService(
184
304
self.interface,
191
311
self.group.Commit()
192
312
def entry_group_state_changed(self, state, error):
193
313
"""Derived from the Avahi example code"""
194
logger.debug(u"Avahi state change: %i", state)
314
logger.debug("Avahi entry group state change: %i", state)
195
315
196
316
if state == avahi.ENTRY_GROUP_ESTABLISHED:
197
logger.debug(u"Zeroconf service established.")
317
logger.debug("Zeroconf service established.")
198
318
elif state == avahi.ENTRY_GROUP_COLLISION:
199
logger.warning(u"Zeroconf service name collision.")
319
logger.info("Zeroconf service name collision.")
200
320
self.rename()
201
321
elif state == avahi.ENTRY_GROUP_FAILURE:
202
logger.critical(u"Avahi: Error in group state changed %s",
322
logger.critical("Avahi: Error in group state changed %s",
203
323
unicode(error))
204
raise AvahiGroupError(u"State changed: %s"
324
raise AvahiGroupError("State changed: %s"
205
325
% unicode(error))
206
326
def cleanup(self):
207
327
"""Derived from the Avahi example code"""
208
328
if self.group is not None:
209
self.group.Free()
329
try:
330
self.group.Free()
331
except (dbus.exceptions.UnknownMethodException,
332
dbus.exceptions.DBusException):
333
pass
210
334
self.group = None
211
def server_state_changed(self, state):
335
self.remove()
336
def server_state_changed(self, state, error=None):
212
337
"""Derived from the Avahi example code"""
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
215
self.remove()
338
logger.debug("Avahi server state change: %i", state)
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"Zeroconf server failure" }
346
if state in bad_states:
347
if bad_states[state] is not None:
348
if error is None:
349
logger.error(bad_states[state])
350
else:
351
logger.error(bad_states[state] + ": %r", error)
352
self.cleanup()
216
353
elif state == avahi.SERVER_RUNNING:
217
354
self.add()
355
else:
356
if error is None:
357
logger.debug("Unknown state: %r", state)
358
else:
359
logger.debug("Unknown state: %r: %r", state, error)
218
360
def activate(self):
219
361
"""Derived from the Avahi example code"""
220
362
if self.server is None:
221
363
self.server = dbus.Interface(
222
364
self.bus.get_object(avahi.DBUS_NAME,
223
avahi.DBUS_PATH_SERVER),
365
avahi.DBUS_PATH_SERVER,
366
follow_name_owner_changes=True),
224
367
avahi.DBUS_INTERFACE_SERVER)
225
self.server.connect_to_signal(u"StateChanged",
368
self.server.connect_to_signal("StateChanged",
226
369
self.server_state_changed)
227
370
self.server_state_changed(self.server.GetState())
228
371
372
class AvahiServiceToSyslog(AvahiService):
373
def rename(self):
374
"""Add the new name to the syslog messages"""
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
380
return ret
229
381
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
387
230
388
class Client(object):
231
389
"""A representation of a client host served by this server.
232
390
233
391
Attributes:
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
236
fingerprint: string (40 or 32 hexadecimal digits); used to
237
uniquely identify the client
238
secret: bytestring; sent verbatim (over TLS) to client
239
host: string; available for use by the checker command
240
created: datetime.datetime(); (UTC) object creation
241
last_enabled: datetime.datetime(); (UTC)
242
enabled: bool()
243
last_checked_ok: datetime.datetime(); (UTC) or None
244
timeout: datetime.timedelta(); How long from last_checked_ok
245
until this client is invalid
246
interval: datetime.timedelta(); How often to start a new checker
247
disable_hook: If set, called by disable() as disable_hook(self)
392
approved: bool(); 'None' if not yet approved/disapproved
393
approval_delay: datetime.timedelta(); Time to wait for approval
394
approval_duration: datetime.timedelta(); Duration of one approval
248
395
checker: subprocess.Popen(); a running checker process used
249
396
to see if the client lives.
250
397
'None' if no process is running.
251
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
253
checker_callback_tag: - '' -
254
checker_command: string; External command which is run to check if
255
client lives. %() expansions are done at
398
checker_callback_tag: a gobject event source tag, or None
399
checker_command: string; External command which is run to check
400
if client lives. %() expansions are done at
256
401
runtime with vars(self) as dict, so that for
257
402
instance %(name)s can be used in the command.
403
checker_initiator_tag: a gobject event source tag, or None
404
created: datetime.datetime(); (UTC) object creation
405
client_structure: Object describing what attributes a client has
406
and is used for storing the client at exit
258
407
current_checker_command: string; current running checker_command
408
disable_initiator_tag: a gobject event source tag, or None
409
enabled: bool()
410
fingerprint: string (40 or 32 hexadecimal digits); used to
411
uniquely identify the client
412
host: string; available for use by the checker command
413
interval: datetime.timedelta(); How often to start a new checker
414
last_approval_request: datetime.datetime(); (UTC) or None
415
last_checked_ok: datetime.datetime(); (UTC) or None
416
last_checker_status: integer between 0 and 255 reflecting exit
417
status of last checker. -1 reflects crashed
418
checker, or None.
419
last_enabled: datetime.datetime(); (UTC) or None
420
name: string; from the config file, used in log messages and
421
D-Bus identifiers
422
secret: bytestring; sent verbatim (over TLS) to client
423
timeout: datetime.timedelta(); How long from last_checked_ok
424
until this client is disabled
425
extended_timeout: extra long timeout when password has been sent
426
runtime_expansions: Allowed attributes for runtime expansion.
427
expires: datetime.datetime(); time (UTC) when a client will be
428
disabled, or None
259
429
"""
260
430
261
@staticmethod
262
def _timedelta_to_milliseconds(td):
263
"Convert a datetime.timedelta() to milliseconds"
264
return ((td.days * 24 * 60 * 60 * 1000)
265
+ (td.seconds * 1000)
266
+ (td.microseconds // 1000))
431
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
434
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
267
445
268
446
def timeout_milliseconds(self):
269
447
"Return the 'timeout' attribute in milliseconds"
270
return self._timedelta_to_milliseconds(self.timeout)
448
return timedelta_to_milliseconds(self.timeout)
449
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
271
453
272
454
def interval_milliseconds(self):
273
455
"Return the 'interval' attribute in milliseconds"
274
return self._timedelta_to_milliseconds(self.interval)
456
return timedelta_to_milliseconds(self.interval)
275
457
276
def __init__(self, name = None, disable_hook=None, config=None):
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
460
461
@staticmethod
462
def config_parser(config):
463
"""Construct a new dict of client settings of this form:
464
{ client_name: {setting_name: value, ...}, ...}
465
with exceptions for any special settings as defined above.
466
NOTE: Must be a pure function. Must return the same result
467
value given the same arguments.
468
"""
469
settings = {}
470
for client_name in config.sections():
471
section = dict(config.items(client_name))
472
client = settings[client_name] = {}
473
474
client["host"] = section["host"]
475
# Reformat values from string types to Python types
476
client["approved_by_default"] = config.getboolean(
477
client_name, "approved_by_default")
478
client["enabled"] = config.getboolean(client_name,
479
"enabled")
480
481
client["fingerprint"] = (section["fingerprint"].upper()
482
.replace(" ", ""))
483
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
485
elif "secfile" in section:
486
with open(os.path.expanduser(os.path.expandvars
487
(section["secfile"])),
488
"rb") as secfile:
489
client["secret"] = secfile.read()
490
else:
491
raise TypeError("No secret or secfile for section %s"
492
% section)
493
client["timeout"] = string_to_delta(section["timeout"])
494
client["extended_timeout"] = string_to_delta(
495
section["extended_timeout"])
496
client["interval"] = string_to_delta(section["interval"])
497
client["approval_delay"] = string_to_delta(
498
section["approval_delay"])
499
client["approval_duration"] = string_to_delta(
500
section["approval_duration"])
501
client["checker_command"] = section["checker"]
502
client["last_approval_request"] = None
503
client["last_checked_ok"] = None
504
client["last_checker_status"] = None
505
506
return settings
507
508
509
def __init__(self, settings, name = None):
277
510
"""Note: the 'checker' key in 'config' sets the
278
511
'checker_command' attribute and *not* the 'checker'
279
512
attribute."""
280
513
self.name = name
281
if config is None:
282
config = {}
283
logger.debug(u"Creating client %r", self.name)
514
# adding all client settings
515
for setting, value in settings.iteritems():
516
setattr(self, setting, value)
517
518
if self.enabled:
519
if not hasattr(self, "last_enabled"):
520
self.last_enabled = datetime.datetime.utcnow()
521
if not hasattr(self, "expires"):
522
self.expires = (datetime.datetime.utcnow()
523
+ self.timeout)
524
else:
525
self.last_enabled = None
526
self.expires = None
527
528
logger.debug("Creating client %r", self.name)
284
529
# Uppercase and remove spaces from fingerprint for later
285
530
# comparison purposes with return value from the fingerprint()
286
531
# function
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
289
logger.debug(u" Fingerprint: %s", self.fingerprint)
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
294
(os.path.expandvars
295
(config[u"secfile"])))) as secfile:
296
self.secret = secfile.read()
297
else:
298
raise TypeError(u"No secret or secfile for client %s"
299
% self.name)
300
self.host = config.get(u"host", u"")
301
self.created = datetime.datetime.utcnow()
302
self.enabled = False
303
self.last_enabled = None
304
self.last_checked_ok = None
305
self.timeout = string_to_delta(config[u"timeout"])
306
self.interval = string_to_delta(config[u"interval"])
307
self.disable_hook = disable_hook
532
logger.debug(" Fingerprint: %s", self.fingerprint)
533
self.created = settings.get("created",
534
datetime.datetime.utcnow())
535
536
# attributes specific for this server instance
308
537
self.checker = None
309
538
self.checker_initiator_tag = None
310
539
self.disable_initiator_tag = None
311
540
self.checker_callback_tag = None
312
self.checker_command = config[u"checker"]
313
541
self.current_checker_command = None
314
self.last_connect = None
542
self.approved = None
543
self.approvals_pending = 0
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
549
if not attr.startswith("_")]
550
self.client_structure.append("client_structure")
551
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
556
if not name.startswith("_"):
557
self.client_structure.append(name)
558
559
# Send notice to process children that client state has changed
560
def send_changedstate(self):
561
with self.changedstate:
562
self.changedstate.notify_all()
315
563
316
564
def enable(self):
317
565
"""Start this client's checker and timeout hooks"""
318
if getattr(self, u"enabled", False):
566
if getattr(self, "enabled", False):
319
567
# Already enabled
320
568
return
569
self.send_changedstate()
570
self.expires = datetime.datetime.utcnow() + self.timeout
571
self.enabled = True
321
572
self.last_enabled = datetime.datetime.utcnow()
573
self.init_checker()
574
575
def disable(self, quiet=True):
576
"""Disable this client."""
577
if not getattr(self, "enabled", False):
578
return False
579
if not quiet:
580
self.send_changedstate()
581
if not quiet:
582
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
584
gobject.source_remove(self.disable_initiator_tag)
585
self.disable_initiator_tag = None
586
self.expires = None
587
if getattr(self, "checker_initiator_tag", False):
588
gobject.source_remove(self.checker_initiator_tag)
589
self.checker_initiator_tag = None
590
self.stop_checker()
591
self.enabled = False
592
# Do not run this again if called by a gobject.timeout_add
593
return False
594
595
def __del__(self):
596
self.disable()
597
598
def init_checker(self):
322
599
# Schedule a new checker to be started an 'interval' from now,
323
600
# and every interval from then on.
324
601
self.checker_initiator_tag = (gobject.timeout_add
325
602
(self.interval_milliseconds(),
326
603
self.start_checker))
327
# Also start a new checker *right now*.
328
self.start_checker()
329
604
# Schedule a disable() when 'timeout' has passed
330
605
self.disable_initiator_tag = (gobject.timeout_add
331
606
(self.timeout_milliseconds(),
332
607
self.disable))
333
self.enabled = True
334
335
def disable(self):
336
"""Disable this client."""
337
if not getattr(self, "enabled", False):
338
return False
339
logger.info(u"Disabling client %s", self.name)
340
if getattr(self, u"disable_initiator_tag", False):
341
gobject.source_remove(self.disable_initiator_tag)
342
self.disable_initiator_tag = None
343
if getattr(self, u"checker_initiator_tag", False):
344
gobject.source_remove(self.checker_initiator_tag)
345
self.checker_initiator_tag = None
346
self.stop_checker()
347
if self.disable_hook:
348
self.disable_hook(self)
349
self.enabled = False
350
# Do not run this again if called by a gobject.timeout_add
351
return False
352
353
def __del__(self):
354
self.disable_hook = None
355
self.disable()
608
# Also start a new checker *right now*.
609
self.start_checker()
356
610
357
611
def checker_callback(self, pid, condition, command):
358
612
"""The checker has completed, so take appropriate actions."""
359
613
self.checker_callback_tag = None
360
614
self.checker = None
361
615
if os.WIFEXITED(condition):
362
exitstatus = os.WEXITSTATUS(condition)
363
if exitstatus == 0:
364
logger.info(u"Checker for %(name)s succeeded",
616
self.last_checker_status = os.WEXITSTATUS(condition)
617
if self.last_checker_status == 0:
618
logger.info("Checker for %(name)s succeeded",
365
619
vars(self))
366
620
self.checked_ok()
367
621
else:
368
logger.info(u"Checker for %(name)s failed",
622
logger.info("Checker for %(name)s failed",
369
623
vars(self))
370
624
else:
371
logger.warning(u"Checker for %(name)s crashed?",
625
self.last_checker_status = -1
626
logger.warning("Checker for %(name)s crashed?",
372
627
vars(self))
373
628
374
def checked_ok(self):
629
def checked_ok(self, timeout=None):
375
630
"""Bump up the timeout for this client.
376
631
377
632
This should only be called when the client has been seen,
378
633
alive and well.
379
634
"""
635
if timeout is None:
636
timeout = self.timeout
380
637
self.last_checked_ok = datetime.datetime.utcnow()
381
gobject.source_remove(self.disable_initiator_tag)
382
self.disable_initiator_tag = (gobject.timeout_add
383
(self.timeout_milliseconds(),
384
self.disable))
638
if self.disable_initiator_tag is not None:
639
gobject.source_remove(self.disable_initiator_tag)
640
if getattr(self, "enabled", False):
641
self.disable_initiator_tag = (gobject.timeout_add
642
(timedelta_to_milliseconds
643
(timeout), self.disable))
644
self.expires = datetime.datetime.utcnow() + timeout
645
646
def need_approval(self):
647
self.last_approval_request = datetime.datetime.utcnow()
385
648
386
649
def start_checker(self):
387
650
"""Start a new checker subprocess if one is not running.
394
657
# client would inevitably timeout, since no checker would get
395
658
# a chance to run to completion. If we instead leave running
396
659
# checkers alone, the checker would have to take more time
397
# than 'timeout' for the client to be declared invalid, which
398
# is as it should be.
660
# than 'timeout' for the client to be disabled, which is as it
661
# should be.
399
662
400
663
# If a checker exists, make sure it is not a zombie
401
if self.checker is not None:
664
try:
402
665
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
666
except (AttributeError, OSError) as error:
667
if (isinstance(error, OSError)
668
and error.errno != errno.ECHILD):
669
raise error
670
else:
403
671
if pid:
404
logger.warning(u"Checker was a zombie")
672
logger.warning("Checker was a zombie")
405
673
gobject.source_remove(self.checker_callback_tag)
406
674
self.checker_callback(pid, status,
407
675
self.current_checker_command)
412
680
command = self.checker_command % self.host
413
681
except TypeError:
414
682
# Escape attributes for the shell
415
escaped_attrs = dict((key,
416
re.escape(unicode(str(val),
417
errors=
418
u'replace')))
419
for key, val in
420
vars(self).iteritems())
683
escaped_attrs = dict(
684
(attr,
685
re.escape(unicode(str(getattr(self, attr, "")),
686
errors=
687
'replace')))
688
for attr in
689
self.runtime_expansions)
690
421
691
try:
422
692
command = self.checker_command % escaped_attrs
423
except TypeError, error:
424
logger.error(u'Could not format string "%s":'
425
u' %s', self.checker_command, error)
693
except TypeError as error:
694
logger.error('Could not format string "%s":'
695
' %s', self.checker_command, error)
426
696
return True # Try again later
427
697
self.current_checker_command = command
428
698
try:
429
logger.info(u"Starting checker %r for %s",
699
logger.info("Starting checker %r for %s",
430
700
command, self.name)
431
701
# We don't need to redirect stdout and stderr, since
432
702
# in normal mode, that is already done by daemon(),
434
704
# always replaced by /dev/null.)
435
705
self.checker = subprocess.Popen(command,
436
706
close_fds=True,
437
shell=True, cwd=u"/")
707
shell=True, cwd="/")
438
708
self.checker_callback_tag = (gobject.child_watch_add
439
709
(self.checker.pid,
440
710
self.checker_callback,
445
715
if pid:
446
716
gobject.source_remove(self.checker_callback_tag)
447
717
self.checker_callback(pid, status, command)
448
except OSError, error:
449
logger.error(u"Failed to start subprocess: %s",
718
except OSError as error:
719
logger.error("Failed to start subprocess: %s",
450
720
error)
451
721
# Re-run this periodically if run by gobject.timeout_add
452
722
return True
456
726
if self.checker_callback_tag:
457
727
gobject.source_remove(self.checker_callback_tag)
458
728
self.checker_callback_tag = None
459
if getattr(self, u"checker", None) is None:
729
if getattr(self, "checker", None) is None:
460
730
return
461
logger.debug(u"Stopping checker for %(name)s", vars(self))
731
logger.debug("Stopping checker for %(name)s", vars(self))
462
732
try:
463
733
os.kill(self.checker.pid, signal.SIGTERM)
464
#os.sleep(0.5)
734
#time.sleep(0.5)
465
735
#if self.checker.poll() is None:
466
736
# os.kill(self.checker.pid, signal.SIGKILL)
467
except OSError, error:
737
except OSError as error:
468
738
if error.errno != errno.ESRCH: # No such process
469
739
raise
470
740
self.checker = None
471
472
def still_valid(self):
473
"""Has the timeout not yet passed for this client?"""
474
if not getattr(self, u"enabled", False):
475
return False
476
now = datetime.datetime.utcnow()
477
if self.last_checked_ok is None:
478
return now < (self.created + self.timeout)
479
else:
480
return now < (self.last_checked_ok + self.timeout)
481
482
483
def dbus_service_property(dbus_interface, signature=u"v",
484
access=u"readwrite", byte_arrays=False):
741
742
743
def dbus_service_property(dbus_interface, signature="v",
744
access="readwrite", byte_arrays=False):
485
745
"""Decorators for marking methods of a DBusObjectWithProperties to
486
746
become properties on the D-Bus.
487
747
492
752
dbus.service.method, except there is only "signature", since the
493
753
type from Get() and the type sent to Set() is the same.
494
754
"""
755
# Encoding deeply encoded byte arrays is not supported yet by the
756
# "Set" method, so we fail early here:
757
if byte_arrays and signature != "ay":
758
raise ValueError("Byte arrays not supported for non-'ay'"
759
" signature %r" % signature)
495
760
def decorator(func):
496
761
func._dbus_is_property = True
497
762
func._dbus_interface = dbus_interface
498
763
func._dbus_signature = signature
499
764
func._dbus_access = access
500
765
func._dbus_name = func.__name__
501
if func._dbus_name.endswith(u"_dbus_property"):
766
if func._dbus_name.endswith("_dbus_property"):
502
767
func._dbus_name = func._dbus_name[:-14]
503
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
768
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
504
769
return func
505
770
return decorator
506
771
526
791
527
792
class DBusObjectWithProperties(dbus.service.Object):
528
793
"""A D-Bus object with properties.
529
794
530
795
Classes inheriting from this can use the dbus_service_property
531
796
decorator to expose methods as D-Bus properties. It exposes the
532
797
standard Get(), Set(), and GetAll() methods on the D-Bus.
534
799
535
800
@staticmethod
536
801
def _is_dbus_property(obj):
537
return getattr(obj, u"_dbus_is_property", False)
802
return getattr(obj, "_dbus_is_property", False)
538
803
539
804
def _get_all_dbus_properties(self):
540
805
"""Returns a generator of (name, attribute) pairs
541
806
"""
542
return ((prop._dbus_name, prop)
807
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
808
for cls in self.__class__.__mro__
543
809
for name, prop in
544
inspect.getmembers(self, self._is_dbus_property))
810
inspect.getmembers(cls, self._is_dbus_property))
545
811
546
812
def _get_dbus_property(self, interface_name, property_name):
547
813
"""Returns a bound method if one exists which is a D-Bus
548
814
property with the specified name and interface.
549
815
"""
550
for name in (property_name,
551
property_name + u"_dbus_property"):
552
prop = getattr(self, name, None)
553
if (prop is None
554
or not self._is_dbus_property(prop)
555
or prop._dbus_name != property_name
556
or (interface_name and prop._dbus_interface
557
and interface_name != prop._dbus_interface)):
558
continue
559
return prop
816
for cls in self.__class__.__mro__:
817
for name, value in (inspect.getmembers
818
(cls, self._is_dbus_property)):
819
if (value._dbus_name == property_name
820
and value._dbus_interface == interface_name):
821
return value.__get__(self)
822
560
823
# No such property
561
raise DBusPropertyNotFound(self.dbus_object_path + u":"
562
+ interface_name + u"."
824
raise DBusPropertyNotFound(self.dbus_object_path + ":"
825
+ interface_name + "."
563
826
+ property_name)
564
827
565
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
566
out_signature=u"v")
828
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
829
out_signature="v")
567
830
def Get(self, interface_name, property_name):
568
831
"""Standard D-Bus property Get() method, see D-Bus standard.
569
832
"""
570
833
prop = self._get_dbus_property(interface_name, property_name)
571
if prop._dbus_access == u"write":
834
if prop._dbus_access == "write":
572
835
raise DBusPropertyAccessException(property_name)
573
836
value = prop()
574
if not hasattr(value, u"variant_level"):
837
if not hasattr(value, "variant_level"):
575
838
return value
576
839
return type(value)(value, variant_level=value.variant_level+1)
577
840
578
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
841
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
579
842
def Set(self, interface_name, property_name, value):
580
843
"""Standard D-Bus property Set() method, see D-Bus standard.
581
844
"""
582
845
prop = self._get_dbus_property(interface_name, property_name)
583
if prop._dbus_access == u"read":
846
if prop._dbus_access == "read":
584
847
raise DBusPropertyAccessException(property_name)
585
if prop._dbus_get_args_options[u"byte_arrays"]:
586
value = dbus.ByteArray(''.join(unichr(byte)
587
for byte in value))
848
if prop._dbus_get_args_options["byte_arrays"]:
849
# The byte_arrays option is not supported yet on
850
# signatures other than "ay".
851
if prop._dbus_signature != "ay":
852
raise ValueError
853
value = dbus.ByteArray(b''.join(chr(byte)
854
for byte in value))
588
855
prop(value)
589
856
590
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
591
out_signature=u"a{sv}")
857
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
858
out_signature="a{sv}")
592
859
def GetAll(self, interface_name):
593
860
"""Standard D-Bus property GetAll() method, see D-Bus
594
861
standard.
595
862
596
863
Note: Will not include properties with access="write".
597
864
"""
598
all = {}
865
properties = {}
599
866
for name, prop in self._get_all_dbus_properties():
600
867
if (interface_name
601
868
and interface_name != prop._dbus_interface):
602
869
# Interface non-empty but did not match
603
870
continue
604
871
# Ignore write-only properties
605
if prop._dbus_access == u"write":
872
if prop._dbus_access == "write":
606
873
continue
607
874
value = prop()
608
if not hasattr(value, u"variant_level"):
609
all[name] = value
875
if not hasattr(value, "variant_level"):
876
properties[name] = value
610
877
continue
611
all[name] = type(value)(value, variant_level=
612
value.variant_level+1)
613
return dbus.Dictionary(all, signature=u"sv")
878
properties[name] = type(value)(value, variant_level=
879
value.variant_level+1)
880
return dbus.Dictionary(properties, signature="sv")
614
881
615
882
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
616
out_signature=u"s",
883
out_signature="s",
617
884
path_keyword='object_path',
618
885
connection_keyword='connection')
619
886
def Introspect(self, object_path, connection):
620
887
"""Standard D-Bus method, overloaded to insert property tags.
621
888
"""
622
889
xmlstring = dbus.service.Object.Introspect(self, object_path,
623
connection)
624
document = xml.dom.minidom.parseString(xmlstring)
625
del xmlstring
626
def make_tag(document, name, prop):
627
e = document.createElement(u"property")
628
e.setAttribute(u"name", name)
629
e.setAttribute(u"type", prop._dbus_signature)
630
e.setAttribute(u"access", prop._dbus_access)
631
return e
632
for if_tag in document.getElementsByTagName(u"interface"):
633
for tag in (make_tag(document, name, prop)
634
for name, prop
635
in self._get_all_dbus_properties()
636
if prop._dbus_interface
637
== if_tag.getAttribute(u"name")):
638
if_tag.appendChild(tag)
639
xmlstring = document.toxml(u"utf-8")
640
document.unlink()
890
connection)
891
try:
892
document = xml.dom.minidom.parseString(xmlstring)
893
def make_tag(document, name, prop):
894
e = document.createElement("property")
895
e.setAttribute("name", name)
896
e.setAttribute("type", prop._dbus_signature)
897
e.setAttribute("access", prop._dbus_access)
898
return e
899
for if_tag in document.getElementsByTagName("interface"):
900
for tag in (make_tag(document, name, prop)
901
for name, prop
902
in self._get_all_dbus_properties()
903
if prop._dbus_interface
904
== if_tag.getAttribute("name")):
905
if_tag.appendChild(tag)
906
# Add the names to the return values for the
907
# "org.freedesktop.DBus.Properties" methods
908
if (if_tag.getAttribute("name")
909
== "org.freedesktop.DBus.Properties"):
910
for cn in if_tag.getElementsByTagName("method"):
911
if cn.getAttribute("name") == "Get":
912
for arg in cn.getElementsByTagName("arg"):
913
if (arg.getAttribute("direction")
914
== "out"):
915
arg.setAttribute("name", "value")
916
elif cn.getAttribute("name") == "GetAll":
917
for arg in cn.getElementsByTagName("arg"):
918
if (arg.getAttribute("direction")
919
== "out"):
920
arg.setAttribute("name", "props")
921
xmlstring = document.toxml("utf-8")
922
document.unlink()
923
except (AttributeError, xml.dom.DOMException,
924
xml.parsers.expat.ExpatError) as error:
925
logger.error("Failed to override Introspection method",
926
error)
641
927
return xmlstring
642
928
643
929
930
def datetime_to_dbus (dt, variant_level=0):
931
"""Convert a UTC datetime.datetime() to a D-Bus type."""
932
if dt is None:
933
return dbus.String("", variant_level = variant_level)
934
return dbus.String(dt.isoformat(),
935
variant_level=variant_level)
936
937
938
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
939
.__metaclass__):
940
"""Applied to an empty subclass of a D-Bus object, this metaclass
941
will add additional D-Bus attributes matching a certain pattern.
942
"""
943
def __new__(mcs, name, bases, attr):
944
# Go through all the base classes which could have D-Bus
945
# methods, signals, or properties in them
946
for base in (b for b in bases
947
if issubclass(b, dbus.service.Object)):
948
# Go though all attributes of the base class
949
for attrname, attribute in inspect.getmembers(base):
950
# Ignore non-D-Bus attributes, and D-Bus attributes
951
# with the wrong interface name
952
if (not hasattr(attribute, "_dbus_interface")
953
or not attribute._dbus_interface
954
.startswith("se.recompile.Mandos")):
955
continue
956
# Create an alternate D-Bus interface name based on
957
# the current name
958
alt_interface = (attribute._dbus_interface
959
.replace("se.recompile.Mandos",
960
"se.bsnet.fukt.Mandos"))
961
# Is this a D-Bus signal?
962
if getattr(attribute, "_dbus_is_signal", False):
963
# Extract the original non-method function by
964
# black magic
965
nonmethod_func = (dict(
966
zip(attribute.func_code.co_freevars,
967
attribute.__closure__))["func"]
968
.cell_contents)
969
# Create a new, but exactly alike, function
970
# object, and decorate it to be a new D-Bus signal
971
# with the alternate D-Bus interface name
972
new_function = (dbus.service.signal
973
(alt_interface,
974
attribute._dbus_signature)
975
(types.FunctionType(
976
nonmethod_func.func_code,
977
nonmethod_func.func_globals,
978
nonmethod_func.func_name,
979
nonmethod_func.func_defaults,
980
nonmethod_func.func_closure)))
981
# Define a creator of a function to call both the
982
# old and new functions, so both the old and new
983
# signals gets sent when the function is called
984
def fixscope(func1, func2):
985
"""This function is a scope container to pass
986
func1 and func2 to the "call_both" function
987
outside of its arguments"""
988
def call_both(*args, **kwargs):
989
"""This function will emit two D-Bus
990
signals by calling func1 and func2"""
991
func1(*args, **kwargs)
992
func2(*args, **kwargs)
993
return call_both
994
# Create the "call_both" function and add it to
995
# the class
996
attr[attrname] = fixscope(attribute,
997
new_function)
998
# Is this a D-Bus method?
999
elif getattr(attribute, "_dbus_is_method", False):
1000
# Create a new, but exactly alike, function
1001
# object. Decorate it to be a new D-Bus method
1002
# with the alternate D-Bus interface name. Add it
1003
# to the class.
1004
attr[attrname] = (dbus.service.method
1005
(alt_interface,
1006
attribute._dbus_in_signature,
1007
attribute._dbus_out_signature)
1008
(types.FunctionType
1009
(attribute.func_code,
1010
attribute.func_globals,
1011
attribute.func_name,
1012
attribute.func_defaults,
1013
attribute.func_closure)))
1014
# Is this a D-Bus property?
1015
elif getattr(attribute, "_dbus_is_property", False):
1016
# Create a new, but exactly alike, function
1017
# object, and decorate it to be a new D-Bus
1018
# property with the alternate D-Bus interface
1019
# name. Add it to the class.
1020
attr[attrname] = (dbus_service_property
1021
(alt_interface,
1022
attribute._dbus_signature,
1023
attribute._dbus_access,
1024
attribute
1025
._dbus_get_args_options
1026
["byte_arrays"])
1027
(types.FunctionType
1028
(attribute.func_code,
1029
attribute.func_globals,
1030
attribute.func_name,
1031
attribute.func_defaults,
1032
attribute.func_closure)))
1033
return type.__new__(mcs, name, bases, attr)
1034
1035
644
1036
class ClientDBus(Client, DBusObjectWithProperties):
645
1037
"""A Client class using D-Bus
646
1038
648
1040
dbus_object_path: dbus.ObjectPath
649
1041
bus: dbus.SystemBus()
650
1042
"""
1043
1044
runtime_expansions = (Client.runtime_expansions
1045
+ ("dbus_object_path",))
1046
651
1047
# dbus.service.Object doesn't use super(), so we can't either.
652
1048
653
1049
def __init__(self, bus = None, *args, **kwargs):
654
1050
self.bus = bus
655
1051
Client.__init__(self, *args, **kwargs)
1052
self._approvals_pending = 0
1053
1054
self._approvals_pending = 0
656
1055
# Only now, when this client is initialized, can it show up on
657
1056
# the D-Bus
1057
client_object_name = unicode(self.name).translate(
1058
{ord("."): ord("_"),
1059
ord("-"): ord("_")})
658
1060
self.dbus_object_path = (dbus.ObjectPath
659
(u"/clients/"
660
+ self.name.replace(u".", u"_")))
1061
("/clients/" + client_object_name))
661
1062
DBusObjectWithProperties.__init__(self, self.bus,
662
1063
self.dbus_object_path)
663
664
@staticmethod
665
def _datetime_to_dbus(dt, variant_level=0):
666
"""Convert a UTC datetime.datetime() to a D-Bus type."""
667
return dbus.String(dt.isoformat(),
668
variant_level=variant_level)
669
670
def enable(self):
671
oldstate = getattr(self, u"enabled", False)
672
r = Client.enable(self)
673
if oldstate != self.enabled:
674
# Emit D-Bus signals
675
self.PropertyChanged(dbus.String(u"enabled"),
676
dbus.Boolean(True, variant_level=1))
677
self.PropertyChanged(
678
dbus.String(u"last_enabled"),
679
self._datetime_to_dbus(self.last_enabled,
680
variant_level=1))
681
return r
682
683
def disable(self, signal = True):
684
oldstate = getattr(self, u"enabled", False)
685
r = Client.disable(self)
686
if signal and oldstate != self.enabled:
687
# Emit D-Bus signal
688
self.PropertyChanged(dbus.String(u"enabled"),
689
dbus.Boolean(False, variant_level=1))
690
return r
1064
1065
def notifychangeproperty(transform_func,
1066
dbus_name, type_func=lambda x: x,
1067
variant_level=1):
1068
""" Modify a variable so that it's a property which announces
1069
its changes to DBus.
1070
1071
transform_fun: Function that takes a value and a variant_level
1072
and transforms it to a D-Bus type.
1073
dbus_name: D-Bus name of the variable
1074
type_func: Function that transform the value before sending it
1075
to the D-Bus. Default: no transform
1076
variant_level: D-Bus variant level. Default: 1
1077
"""
1078
attrname = "_{0}".format(dbus_name)
1079
def setter(self, value):
1080
if hasattr(self, "dbus_object_path"):
1081
if (not hasattr(self, attrname) or
1082
type_func(getattr(self, attrname, None))
1083
!= type_func(value)):
1084
dbus_value = transform_func(type_func(value),
1085
variant_level
1086
=variant_level)
1087
self.PropertyChanged(dbus.String(dbus_name),
1088
dbus_value)
1089
setattr(self, attrname, value)
1090
1091
return property(lambda self: getattr(self, attrname), setter)
1092
1093
1094
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1095
approvals_pending = notifychangeproperty(dbus.Boolean,
1096
"ApprovalPending",
1097
type_func = bool)
1098
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1099
last_enabled = notifychangeproperty(datetime_to_dbus,
1100
"LastEnabled")
1101
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1102
type_func = lambda checker:
1103
checker is not None)
1104
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1105
"LastCheckedOK")
1106
last_approval_request = notifychangeproperty(
1107
datetime_to_dbus, "LastApprovalRequest")
1108
approved_by_default = notifychangeproperty(dbus.Boolean,
1109
"ApprovedByDefault")
1110
approval_delay = notifychangeproperty(dbus.UInt64,
1111
"ApprovalDelay",
1112
type_func =
1113
timedelta_to_milliseconds)
1114
approval_duration = notifychangeproperty(
1115
dbus.UInt64, "ApprovalDuration",
1116
type_func = timedelta_to_milliseconds)
1117
host = notifychangeproperty(dbus.String, "Host")
1118
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1119
type_func =
1120
timedelta_to_milliseconds)
1121
extended_timeout = notifychangeproperty(
1122
dbus.UInt64, "ExtendedTimeout",
1123
type_func = timedelta_to_milliseconds)
1124
interval = notifychangeproperty(dbus.UInt64,
1125
"Interval",
1126
type_func =
1127
timedelta_to_milliseconds)
1128
checker_command = notifychangeproperty(dbus.String, "Checker")
1129
1130
del notifychangeproperty
691
1131
692
1132
def __del__(self, *args, **kwargs):
693
1133
try:
694
1134
self.remove_from_connection()
695
1135
except LookupError:
696
1136
pass
697
if hasattr(DBusObjectWithProperties, u"__del__"):
1137
if hasattr(DBusObjectWithProperties, "__del__"):
698
1138
DBusObjectWithProperties.__del__(self, *args, **kwargs)
699
1139
Client.__del__(self, *args, **kwargs)
700
1140
702
1142
*args, **kwargs):
703
1143
self.checker_callback_tag = None
704
1144
self.checker = None
705
# Emit D-Bus signal
706
self.PropertyChanged(dbus.String(u"checker_running"),
707
dbus.Boolean(False, variant_level=1))
708
1145
if os.WIFEXITED(condition):
709
1146
exitstatus = os.WEXITSTATUS(condition)
710
1147
# Emit D-Bus signal
720
1157
return Client.checker_callback(self, pid, condition, command,
721
1158
*args, **kwargs)
722
1159
723
def checked_ok(self, *args, **kwargs):
724
r = Client.checked_ok(self, *args, **kwargs)
725
# Emit D-Bus signal
726
self.PropertyChanged(
727
dbus.String(u"last_checked_ok"),
728
(self._datetime_to_dbus(self.last_checked_ok,
729
variant_level=1)))
730
return r
731
732
1160
def start_checker(self, *args, **kwargs):
733
1161
old_checker = self.checker
734
1162
if self.checker is not None:
741
1169
and old_checker_pid != self.checker.pid):
742
1170
# Emit D-Bus signal
743
1171
self.CheckerStarted(self.current_checker_command)
744
self.PropertyChanged(
745
dbus.String(u"checker_running"),
746
dbus.Boolean(True, variant_level=1))
747
return r
748
749
def stop_checker(self, *args, **kwargs):
750
old_checker = getattr(self, u"checker", None)
751
r = Client.stop_checker(self, *args, **kwargs)
752
if (old_checker is not None
753
and getattr(self, u"checker", None) is None):
754
self.PropertyChanged(dbus.String(u"checker_running"),
755
dbus.Boolean(False, variant_level=1))
756
return r
757
758
## D-Bus methods & signals
759
_interface = u"se.bsnet.fukt.Mandos.Client"
760
761
# CheckedOK - method
762
@dbus.service.method(_interface)
763
def CheckedOK(self):
764
return self.checked_ok()
1172
return r
1173
1174
def _reset_approved(self):
1175
self.approved = None
1176
return False
1177
1178
def approve(self, value=True):
1179
self.send_changedstate()
1180
self.approved = value
1181
gobject.timeout_add(timedelta_to_milliseconds
1182
(self.approval_duration),
1183
self._reset_approved)
1184
1185
1186
## D-Bus methods, signals & properties
1187
_interface = "se.recompile.Mandos.Client"
1188
1189
## Signals
765
1190
766
1191
# CheckerCompleted - signal
767
@dbus.service.signal(_interface, signature=u"nxs")
1192
@dbus.service.signal(_interface, signature="nxs")
768
1193
def CheckerCompleted(self, exitcode, waitstatus, command):
769
1194
"D-Bus signal"
770
1195
pass
771
1196
772
1197
# CheckerStarted - signal
773
@dbus.service.signal(_interface, signature=u"s")
1198
@dbus.service.signal(_interface, signature="s")
774
1199
def CheckerStarted(self, command):
775
1200
"D-Bus signal"
776
1201
pass
777
1202
778
1203
# PropertyChanged - signal
779
@dbus.service.signal(_interface, signature=u"sv")
1204
@dbus.service.signal(_interface, signature="sv")
780
1205
def PropertyChanged(self, property, value):
781
1206
"D-Bus signal"
782
1207
pass
783
1208
784
# ReceivedSecret - signal
1209
# GotSecret - signal
785
1210
@dbus.service.signal(_interface)
786
def ReceivedSecret(self):
787
"D-Bus signal"
1211
def GotSecret(self):
1212
"""D-Bus signal
1213
Is sent after a successful transfer of secret from the Mandos
1214
server to mandos-client
1215
"""
788
1216
pass
789
1217
790
1218
# Rejected - signal
791
@dbus.service.signal(_interface)
792
def Rejected(self):
793
"D-Bus signal"
794
pass
1219
@dbus.service.signal(_interface, signature="s")
1220
def Rejected(self, reason):
1221
"D-Bus signal"
1222
pass
1223
1224
# NeedApproval - signal
1225
@dbus.service.signal(_interface, signature="tb")
1226
def NeedApproval(self, timeout, default):
1227
"D-Bus signal"
1228
return self.need_approval()
1229
1230
# NeRwequest - signal
1231
@dbus.service.signal(_interface, signature="s")
1232
def NewRequest(self, ip):
1233
"""D-Bus signal
1234
Is sent after a client request a password.
1235
"""
1236
pass
1237
1238
## Methods
1239
1240
# Approve - method
1241
@dbus.service.method(_interface, in_signature="b")
1242
def Approve(self, value):
1243
self.approve(value)
1244
1245
# CheckedOK - method
1246
@dbus.service.method(_interface)
1247
def CheckedOK(self):
1248
self.checked_ok()
795
1249
796
1250
# Enable - method
797
1251
@dbus.service.method(_interface)
816
1270
def StopChecker(self):
817
1271
self.stop_checker()
818
1272
819
# name - property
820
@dbus_service_property(_interface, signature=u"s", access=u"read")
821
def name_dbus_property(self):
1273
## Properties
1274
1275
# ApprovalPending - property
1276
@dbus_service_property(_interface, signature="b", access="read")
1277
def ApprovalPending_dbus_property(self):
1278
return dbus.Boolean(bool(self.approvals_pending))
1279
1280
# ApprovedByDefault - property
1281
@dbus_service_property(_interface, signature="b",
1282
access="readwrite")
1283
def ApprovedByDefault_dbus_property(self, value=None):
1284
if value is None: # get
1285
return dbus.Boolean(self.approved_by_default)
1286
self.approved_by_default = bool(value)
1287
1288
# ApprovalDelay - property
1289
@dbus_service_property(_interface, signature="t",
1290
access="readwrite")
1291
def ApprovalDelay_dbus_property(self, value=None):
1292
if value is None: # get
1293
return dbus.UInt64(self.approval_delay_milliseconds())
1294
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1295
1296
# ApprovalDuration - property
1297
@dbus_service_property(_interface, signature="t",
1298
access="readwrite")
1299
def ApprovalDuration_dbus_property(self, value=None):
1300
if value is None: # get
1301
return dbus.UInt64(timedelta_to_milliseconds(
1302
self.approval_duration))
1303
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1304
1305
# Name - property
1306
@dbus_service_property(_interface, signature="s", access="read")
1307
def Name_dbus_property(self):
822
1308
return dbus.String(self.name)
823
1309
824
# fingerprint - property
825
@dbus_service_property(_interface, signature=u"s", access=u"read")
826
def fingerprint_dbus_property(self):
1310
# Fingerprint - property
1311
@dbus_service_property(_interface, signature="s", access="read")
1312
def Fingerprint_dbus_property(self):
827
1313
return dbus.String(self.fingerprint)
828
1314
829
# host - property
830
@dbus_service_property(_interface, signature=u"s",
831
access=u"readwrite")
832
def host_dbus_property(self, value=None):
1315
# Host - property
1316
@dbus_service_property(_interface, signature="s",
1317
access="readwrite")
1318
def Host_dbus_property(self, value=None):
833
1319
if value is None: # get
834
1320
return dbus.String(self.host)
835
self.host = value
836
# Emit D-Bus signal
837
self.PropertyChanged(dbus.String(u"host"),
838
dbus.String(value, variant_level=1))
839
840
# created - property
841
@dbus_service_property(_interface, signature=u"s", access=u"read")
842
def created_dbus_property(self):
843
return dbus.String(self._datetime_to_dbus(self.created))
844
845
# last_enabled - property
846
@dbus_service_property(_interface, signature=u"s", access=u"read")
847
def last_enabled_dbus_property(self):
848
if self.last_enabled is None:
849
return dbus.String(u"")
850
return dbus.String(self._datetime_to_dbus(self.last_enabled))
851
852
# enabled - property
853
@dbus_service_property(_interface, signature=u"b",
854
access=u"readwrite")
855
def enabled_dbus_property(self, value=None):
1321
self.host = unicode(value)
1322
1323
# Created - property
1324
@dbus_service_property(_interface, signature="s", access="read")
1325
def Created_dbus_property(self):
1326
return datetime_to_dbus(self.created)
1327
1328
# LastEnabled - property
1329
@dbus_service_property(_interface, signature="s", access="read")
1330
def LastEnabled_dbus_property(self):
1331
return datetime_to_dbus(self.last_enabled)
1332
1333
# Enabled - property
1334
@dbus_service_property(_interface, signature="b",
1335
access="readwrite")
1336
def Enabled_dbus_property(self, value=None):
856
1337
if value is None: # get
857
1338
return dbus.Boolean(self.enabled)
858
1339
if value:
860
1341
else:
861
1342
self.disable()
862
1343
863
# last_checked_ok - property
864
@dbus_service_property(_interface, signature=u"s",
865
access=u"readwrite")
866
def last_checked_ok_dbus_property(self, value=None):
1344
# LastCheckedOK - property
1345
@dbus_service_property(_interface, signature="s",
1346
access="readwrite")
1347
def LastCheckedOK_dbus_property(self, value=None):
867
1348
if value is not None:
868
1349
self.checked_ok()
869
1350
return
870
if self.last_checked_ok is None:
871
return dbus.String(u"")
872
return dbus.String(self._datetime_to_dbus(self
873
.last_checked_ok))
874
875
# timeout - property
876
@dbus_service_property(_interface, signature=u"t",
877
access=u"readwrite")
878
def timeout_dbus_property(self, value=None):
1351
return datetime_to_dbus(self.last_checked_ok)
1352
1353
# Expires - property
1354
@dbus_service_property(_interface, signature="s", access="read")
1355
def Expires_dbus_property(self):
1356
return datetime_to_dbus(self.expires)
1357
1358
# LastApprovalRequest - property
1359
@dbus_service_property(_interface, signature="s", access="read")
1360
def LastApprovalRequest_dbus_property(self):
1361
return datetime_to_dbus(self.last_approval_request)
1362
1363
# Timeout - property
1364
@dbus_service_property(_interface, signature="t",
1365
access="readwrite")
1366
def Timeout_dbus_property(self, value=None):
879
1367
if value is None: # get
880
1368
return dbus.UInt64(self.timeout_milliseconds())
881
1369
self.timeout = datetime.timedelta(0, 0, 0, value)
882
# Emit D-Bus signal
883
self.PropertyChanged(dbus.String(u"timeout"),
884
dbus.UInt64(value, variant_level=1))
885
if getattr(self, u"disable_initiator_tag", None) is None:
886
return
887
1370
# Reschedule timeout
888
gobject.source_remove(self.disable_initiator_tag)
889
self.disable_initiator_tag = None
890
time_to_die = (self.
891
_timedelta_to_milliseconds((self
892
.last_checked_ok
893
+ self.timeout)
894
- datetime.datetime
895
.utcnow()))
896
if time_to_die <= 0:
897
# The timeout has passed
898
self.disable()
899
else:
900
self.disable_initiator_tag = (gobject.timeout_add
901
(time_to_die, self.disable))
902
903
# interval - property
904
@dbus_service_property(_interface, signature=u"t",
905
access=u"readwrite")
906
def interval_dbus_property(self, value=None):
1371
if self.enabled:
1372
now = datetime.datetime.utcnow()
1373
time_to_die = timedelta_to_milliseconds(
1374
(self.last_checked_ok + self.timeout) - now)
1375
if time_to_die <= 0:
1376
# The timeout has passed
1377
self.disable()
1378
else:
1379
self.expires = (now +
1380
datetime.timedelta(milliseconds =
1381
time_to_die))
1382
if (getattr(self, "disable_initiator_tag", None)
1383
is None):
1384
return
1385
gobject.source_remove(self.disable_initiator_tag)
1386
self.disable_initiator_tag = (gobject.timeout_add
1387
(time_to_die,
1388
self.disable))
1389
1390
# ExtendedTimeout - property
1391
@dbus_service_property(_interface, signature="t",
1392
access="readwrite")
1393
def ExtendedTimeout_dbus_property(self, value=None):
1394
if value is None: # get
1395
return dbus.UInt64(self.extended_timeout_milliseconds())
1396
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1397
1398
# Interval - property
1399
@dbus_service_property(_interface, signature="t",
1400
access="readwrite")
1401
def Interval_dbus_property(self, value=None):
907
1402
if value is None: # get
908
1403
return dbus.UInt64(self.interval_milliseconds())
909
1404
self.interval = datetime.timedelta(0, 0, 0, value)
910
# Emit D-Bus signal
911
self.PropertyChanged(dbus.String(u"interval"),
912
dbus.UInt64(value, variant_level=1))
913
if getattr(self, u"checker_initiator_tag", None) is None:
1405
if getattr(self, "checker_initiator_tag", None) is None:
914
1406
return
915
# Reschedule checker run
916
gobject.source_remove(self.checker_initiator_tag)
917
self.checker_initiator_tag = (gobject.timeout_add
918
(value, self.start_checker))
919
self.start_checker() # Start one now, too
920
921
# checker - property
922
@dbus_service_property(_interface, signature=u"s",
923
access=u"readwrite")
924
def checker_dbus_property(self, value=None):
1407
if self.enabled:
1408
# Reschedule checker run
1409
gobject.source_remove(self.checker_initiator_tag)
1410
self.checker_initiator_tag = (gobject.timeout_add
1411
(value, self.start_checker))
1412
self.start_checker() # Start one now, too
1413
1414
# Checker - property
1415
@dbus_service_property(_interface, signature="s",
1416
access="readwrite")
1417
def Checker_dbus_property(self, value=None):
925
1418
if value is None: # get
926
1419
return dbus.String(self.checker_command)
927
self.checker_command = value
928
# Emit D-Bus signal
929
self.PropertyChanged(dbus.String(u"checker"),
930
dbus.String(self.checker_command,
931
variant_level=1))
1420
self.checker_command = unicode(value)
932
1421
933
# checker_running - property
934
@dbus_service_property(_interface, signature=u"b",
935
access=u"readwrite")
936
def checker_running_dbus_property(self, value=None):
1422
# CheckerRunning - property
1423
@dbus_service_property(_interface, signature="b",
1424
access="readwrite")
1425
def CheckerRunning_dbus_property(self, value=None):
937
1426
if value is None: # get
938
1427
return dbus.Boolean(self.checker is not None)
939
1428
if value:
941
1430
else:
942
1431
self.stop_checker()
943
1432
944
# object_path - property
945
@dbus_service_property(_interface, signature=u"o", access=u"read")
946
def object_path_dbus_property(self):
1433
# ObjectPath - property
1434
@dbus_service_property(_interface, signature="o", access="read")
1435
def ObjectPath_dbus_property(self):
947
1436
return self.dbus_object_path # is already a dbus.ObjectPath
948
1437
949
# secret = property
950
@dbus_service_property(_interface, signature=u"ay",
951
access=u"write", byte_arrays=True)
952
def secret_dbus_property(self, value):
1438
# Secret = property
1439
@dbus_service_property(_interface, signature="ay",
1440
access="write", byte_arrays=True)
1441
def Secret_dbus_property(self, value):
953
1442
self.secret = str(value)
954
1443
955
1444
del _interface
956
1445
957
1446
1447
class ProxyClient(object):
1448
def __init__(self, child_pipe, fpr, address):
1449
self._pipe = child_pipe
1450
self._pipe.send(('init', fpr, address))
1451
if not self._pipe.recv():
1452
raise KeyError()
1453
1454
def __getattribute__(self, name):
1455
if name == '_pipe':
1456
return super(ProxyClient, self).__getattribute__(name)
1457
self._pipe.send(('getattr', name))
1458
data = self._pipe.recv()
1459
if data[0] == 'data':
1460
return data[1]
1461
if data[0] == 'function':
1462
def func(*args, **kwargs):
1463
self._pipe.send(('funcall', name, args, kwargs))
1464
return self._pipe.recv()[1]
1465
return func
1466
1467
def __setattr__(self, name, value):
1468
if name == '_pipe':
1469
return super(ProxyClient, self).__setattr__(name, value)
1470
self._pipe.send(('setattr', name, value))
1471
1472
1473
class ClientDBusTransitional(ClientDBus):
1474
__metaclass__ = AlternateDBusNamesMetaclass
1475
1476
958
1477
class ClientHandler(socketserver.BaseRequestHandler, object):
959
1478
"""A class to handle client connections.
960
1479
962
1481
Note: This will run in its own forked process."""
963
1482
964
1483
def handle(self):
965
logger.info(u"TCP connection from: %s",
966
unicode(self.client_address))
967
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
968
# Open IPC pipe to parent process
969
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1484
with contextlib.closing(self.server.child_pipe) as child_pipe:
1485
logger.info("TCP connection from: %s",
1486
unicode(self.client_address))
1487
logger.debug("Pipe FD: %d",
1488
self.server.child_pipe.fileno())
1489
970
1490
session = (gnutls.connection
971
1491
.ClientSession(self.request,
972
1492
gnutls.connection
973
1493
.X509Credentials()))
974
1494
975
line = self.request.makefile().readline()
976
logger.debug(u"Protocol version: %r", line)
977
try:
978
if int(line.strip().split()[0]) > 1:
979
raise RuntimeError
980
except (ValueError, IndexError, RuntimeError), error:
981
logger.error(u"Unknown protocol version: %s", error)
982
return
983
984
1495
# Note: gnutls.connection.X509Credentials is really a
985
1496
# generic GnuTLS certificate credentials object so long as
986
1497
# no X.509 keys are added to it. Therefore, we can use it
987
1498
# here despite using OpenPGP certificates.
988
1499
989
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
990
# u"+AES-256-CBC", u"+SHA1",
991
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
992
# u"+DHE-DSS"))
1500
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1501
# "+AES-256-CBC", "+SHA1",
1502
# "+COMP-NULL", "+CTYPE-OPENPGP",
1503
# "+DHE-DSS"))
993
1504
# Use a fallback default, since this MUST be set.
994
1505
priority = self.server.gnutls_priority
995
1506
if priority is None:
996
priority = u"NORMAL"
1507
priority = "NORMAL"
997
1508
(gnutls.library.functions
998
1509
.gnutls_priority_set_direct(session._c_object,
999
1510
priority, None))
1000
1511
1512
# Start communication using the Mandos protocol
1513
# Get protocol number
1514
line = self.request.makefile().readline()
1515
logger.debug("Protocol version: %r", line)
1516
try:
1517
if int(line.strip().split()[0]) > 1:
1518
raise RuntimeError
1519
except (ValueError, IndexError, RuntimeError) as error:
1520
logger.error("Unknown protocol version: %s", error)
1521
return
1522
1523
# Start GnuTLS connection
1001
1524
try:
1002
1525
session.handshake()
1003
except gnutls.errors.GNUTLSError, error:
1004
logger.warning(u"Handshake failed: %s", error)
1526
except gnutls.errors.GNUTLSError as error:
1527
logger.warning("Handshake failed: %s", error)
1005
1528
# Do not run session.bye() here: the session is not
1006
1529
# established. Just abandon the request.
1007
1530
return
1008
logger.debug(u"Handshake succeeded")
1531
logger.debug("Handshake succeeded")
1532
1533
approval_required = False
1009
1534
try:
1010
fpr = self.fingerprint(self.peer_certificate(session))
1011
except (TypeError, gnutls.errors.GNUTLSError), error:
1012
logger.warning(u"Bad certificate: %s", error)
1013
session.bye()
1014
return
1015
logger.debug(u"Fingerprint: %s", fpr)
1535
try:
1536
fpr = self.fingerprint(self.peer_certificate
1537
(session))
1538
except (TypeError,
1539
gnutls.errors.GNUTLSError) as error:
1540
logger.warning("Bad certificate: %s", error)
1541
return
1542
logger.debug("Fingerprint: %s", fpr)
1543
1544
try:
1545
client = ProxyClient(child_pipe, fpr,
1546
self.client_address)
1547
except KeyError:
1548
return
1549
1550
if self.server.use_dbus:
1551
# Emit D-Bus signal
1552
client.NewRequest(str(self.client_address))
1553
1554
if client.approval_delay:
1555
delay = client.approval_delay
1556
client.approvals_pending += 1
1557
approval_required = True
1558
1559
while True:
1560
if not client.enabled:
1561
logger.info("Client %s is disabled",
1562
client.name)
1563
if self.server.use_dbus:
1564
# Emit D-Bus signal
1565
client.Rejected("Disabled")
1566
return
1567
1568
if client.approved or not client.approval_delay:
1569
#We are approved or approval is disabled
1570
break
1571
elif client.approved is None:
1572
logger.info("Client %s needs approval",
1573
client.name)
1574
if self.server.use_dbus:
1575
# Emit D-Bus signal
1576
client.NeedApproval(
1577
client.approval_delay_milliseconds(),
1578
client.approved_by_default)
1579
else:
1580
logger.warning("Client %s was not approved",
1581
client.name)
1582
if self.server.use_dbus:
1583
# Emit D-Bus signal
1584
client.Rejected("Denied")
1585
return
1586
1587
#wait until timeout or approved
1588
time = datetime.datetime.now()
1589
client.changedstate.acquire()
1590
(client.changedstate.wait
1591
(float(client.timedelta_to_milliseconds(delay)
1592
/ 1000)))
1593
client.changedstate.release()
1594
time2 = datetime.datetime.now()
1595
if (time2 - time) >= delay:
1596
if not client.approved_by_default:
1597
logger.warning("Client %s timed out while"
1598
" waiting for approval",
1599
client.name)
1600
if self.server.use_dbus:
1601
# Emit D-Bus signal
1602
client.Rejected("Approval timed out")
1603
return
1604
else:
1605
break
1606
else:
1607
delay -= time2 - time
1608
1609
sent_size = 0
1610
while sent_size < len(client.secret):
1611
try:
1612
sent = session.send(client.secret[sent_size:])
1613
except gnutls.errors.GNUTLSError as error:
1614
logger.warning("gnutls send failed")
1615
return
1616
logger.debug("Sent: %d, remaining: %d",
1617
sent, len(client.secret)
1618
- (sent_size + sent))
1619
sent_size += sent
1620
1621
logger.info("Sending secret to %s", client.name)
1622
# bump the timeout using extended_timeout
1623
client.checked_ok(client.extended_timeout)
1624
if self.server.use_dbus:
1625
# Emit D-Bus signal
1626
client.GotSecret()
1016
1627
1017
for c in self.server.clients:
1018
if c.fingerprint == fpr:
1019
client = c
1020
break
1021
else:
1022
ipc.write(u"NOTFOUND %s %s\n"
1023
% (fpr, unicode(self.client_address)))
1024
session.bye()
1025
return
1026
# Have to check if client.still_valid(), since it is
1027
# possible that the client timed out while establishing
1028
# the GnuTLS session.
1029
if not client.still_valid():
1030
ipc.write(u"INVALID %s\n" % client.name)
1031
session.bye()
1032
return
1033
ipc.write(u"SENDING %s\n" % client.name)
1034
sent_size = 0
1035
while sent_size < len(client.secret):
1036
sent = session.send(client.secret[sent_size:])
1037
logger.debug(u"Sent: %d, remaining: %d",
1038
sent, len(client.secret)
1039
- (sent_size + sent))
1040
sent_size += sent
1041
session.bye()
1628
finally:
1629
if approval_required:
1630
client.approvals_pending -= 1
1631
try:
1632
session.bye()
1633
except gnutls.errors.GNUTLSError as error:
1634
logger.warning("GnuTLS bye failed")
1042
1635
1043
1636
@staticmethod
1044
1637
def peer_certificate(session):
1054
1647
.gnutls_certificate_get_peers
1055
1648
(session._c_object, ctypes.byref(list_size)))
1056
1649
if not bool(cert_list) and list_size.value != 0:
1057
raise gnutls.errors.GNUTLSError(u"error getting peer"
1058
u" certificate")
1650
raise gnutls.errors.GNUTLSError("error getting peer"
1651
" certificate")
1059
1652
if list_size.value == 0:
1060
1653
return None
1061
1654
cert = cert_list[0]
1087
1680
if crtverify.value != 0:
1088
1681
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1089
1682
raise (gnutls.errors.CertificateSecurityError
1090
(u"Verify failed"))
1683
("Verify failed"))
1091
1684
# New buffer for the fingerprint
1092
1685
buf = ctypes.create_string_buffer(20)
1093
1686
buf_len = ctypes.c_size_t()
1100
1693
# Convert the buffer to a Python bytestring
1101
1694
fpr = ctypes.string_at(buf, buf_len.value)
1102
1695
# Convert the bytestring to hexadecimal notation
1103
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1696
hex_fpr = binascii.hexlify(fpr).upper()
1104
1697
return hex_fpr
1105
1698
1106
1699
1107
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1108
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1700
class MultiprocessingMixIn(object):
1701
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1702
def sub_process_main(self, request, address):
1703
try:
1704
self.finish_request(request, address)
1705
except Exception:
1706
self.handle_error(request, address)
1707
self.close_request(request)
1708
1709
def process_request(self, request, address):
1710
"""Start a new process to process the request."""
1711
proc = multiprocessing.Process(target = self.sub_process_main,
1712
args = (request,
1713
address))
1714
proc.start()
1715
return proc
1716
1717
1718
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1719
""" adds a pipe to the MixIn """
1109
1720
def process_request(self, request, client_address):
1110
1721
"""Overrides and wraps the original process_request().
1111
1722
1112
1723
This function creates a new pipe in self.pipe
1113
1724
"""
1114
self.pipe = os.pipe()
1115
super(ForkingMixInWithPipe,
1116
self).process_request(request, client_address)
1117
os.close(self.pipe[1]) # close write end
1118
self.add_pipe(self.pipe[0])
1119
def add_pipe(self, pipe):
1725
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1726
1727
proc = MultiprocessingMixIn.process_request(self, request,
1728
client_address)
1729
self.child_pipe.close()
1730
self.add_pipe(parent_pipe, proc)
1731
1732
def add_pipe(self, parent_pipe, proc):
1120
1733
"""Dummy function; override as necessary"""
1121
os.close(pipe)
1122
1123
1124
class IPv6_TCPServer(ForkingMixInWithPipe,
1734
raise NotImplementedError
1735
1736
1737
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1125
1738
socketserver.TCPServer, object):
1126
1739
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1127
1740
1143
1756
bind to an address or port if they were not specified."""
1144
1757
if self.interface is not None:
1145
1758
if SO_BINDTODEVICE is None:
1146
logger.error(u"SO_BINDTODEVICE does not exist;"
1147
u" cannot bind to interface %s",
1759
logger.error("SO_BINDTODEVICE does not exist;"
1760
" cannot bind to interface %s",
1148
1761
self.interface)
1149
1762
else:
1150
1763
try:
1151
1764
self.socket.setsockopt(socket.SOL_SOCKET,
1152
1765
SO_BINDTODEVICE,
1153
1766
str(self.interface
1154
+ u'\0'))
1155
except socket.error, error:
1767
+ '\0'))
1768
except socket.error as error:
1156
1769
if error[0] == errno.EPERM:
1157
logger.error(u"No permission to"
1158
u" bind to interface %s",
1770
logger.error("No permission to"
1771
" bind to interface %s",
1159
1772
self.interface)
1160
1773
elif error[0] == errno.ENOPROTOOPT:
1161
logger.error(u"SO_BINDTODEVICE not available;"
1162
u" cannot bind to interface %s",
1774
logger.error("SO_BINDTODEVICE not available;"
1775
" cannot bind to interface %s",
1163
1776
self.interface)
1164
1777
else:
1165
1778
raise
1167
1780
if self.server_address[0] or self.server_address[1]:
1168
1781
if not self.server_address[0]:
1169
1782
if self.address_family == socket.AF_INET6:
1170
any_address = u"::" # in6addr_any
1783
any_address = "::" # in6addr_any
1171
1784
else:
1172
1785
any_address = socket.INADDR_ANY
1173
1786
self.server_address = (any_address,
1200
1813
self.enabled = False
1201
1814
self.clients = clients
1202
1815
if self.clients is None:
1203
self.clients = set()
1816
self.clients = {}
1204
1817
self.use_dbus = use_dbus
1205
1818
self.gnutls_priority = gnutls_priority
1206
1819
IPv6_TCPServer.__init__(self, server_address,
1210
1823
def server_activate(self):
1211
1824
if self.enabled:
1212
1825
return socketserver.TCPServer.server_activate(self)
1826
1213
1827
def enable(self):
1214
1828
self.enabled = True
1215
def add_pipe(self, pipe):
1829
1830
def add_pipe(self, parent_pipe, proc):
1216
1831
# Call "handle_ipc" for both data and EOF events
1217
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1218
self.handle_ipc)
1219
def handle_ipc(self, source, condition, file_objects={}):
1832
gobject.io_add_watch(parent_pipe.fileno(),
1833
gobject.IO_IN | gobject.IO_HUP,
1834
functools.partial(self.handle_ipc,
1835
parent_pipe =
1836
parent_pipe,
1837
proc = proc))
1838
1839
def handle_ipc(self, source, condition, parent_pipe=None,
1840
proc = None, client_object=None):
1220
1841
condition_names = {
1221
gobject.IO_IN: u"IN", # There is data to read.
1222
gobject.IO_OUT: u"OUT", # Data can be written (without
1842
gobject.IO_IN: "IN", # There is data to read.
1843
gobject.IO_OUT: "OUT", # Data can be written (without
1223
1844
# blocking).
1224
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1225
gobject.IO_ERR: u"ERR", # Error condition.
1226
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1845
gobject.IO_PRI: "PRI", # There is urgent data to read.
1846
gobject.IO_ERR: "ERR", # Error condition.
1847
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1227
1848
# broken, usually for pipes and
1228
1849
# sockets).
1229
1850
}
1231
1852
for cond, name in
1232
1853
condition_names.iteritems()
1233
1854
if cond & condition)
1234
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1235
conditions_string)
1236
1237
# Turn the pipe file descriptor into a Python file object
1238
if source not in file_objects:
1239
file_objects[source] = os.fdopen(source, u"r", 1)
1240
1241
# Read a line from the file object
1242
cmdline = file_objects[source].readline()
1243
if not cmdline: # Empty line means end of file
1244
# close the IPC pipe
1245
file_objects[source].close()
1246
del file_objects[source]
1247
1248
# Stop calling this function
1249
return False
1250
1251
logger.debug(u"IPC command: %r", cmdline)
1252
1253
# Parse and act on command
1254
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1255
1256
if cmd == u"NOTFOUND":
1257
logger.warning(u"Client not found for fingerprint: %s",
1258
args)
1259
if self.use_dbus:
1260
# Emit D-Bus signal
1261
mandos_dbus_service.ClientNotFound(args)
1262
elif cmd == u"INVALID":
1263
for client in self.clients:
1264
if client.name == args:
1265
logger.warning(u"Client %s is invalid", args)
1266
if self.use_dbus:
1267
# Emit D-Bus signal
1268
client.Rejected()
1269
break
1270
else:
1271
logger.error(u"Unknown client %s is invalid", args)
1272
elif cmd == u"SENDING":
1273
for client in self.clients:
1274
if client.name == args:
1275
logger.info(u"Sending secret to %s", client.name)
1276
client.checked_ok()
1277
if self.use_dbus:
1278
# Emit D-Bus signal
1279
client.ReceivedSecret()
1280
break
1281
else:
1282
logger.error(u"Sending secret to unknown client %s",
1283
args)
1284
else:
1285
logger.error(u"Unknown IPC command: %r", cmdline)
1286
1287
# Keep calling this function
1855
# error, or the other end of multiprocessing.Pipe has closed
1856
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1857
# Wait for other process to exit
1858
proc.join()
1859
return False
1860
1861
# Read a request from the child
1862
request = parent_pipe.recv()
1863
command = request[0]
1864
1865
if command == 'init':
1866
fpr = request[1]
1867
address = request[2]
1868
1869
for c in self.clients.itervalues():
1870
if c.fingerprint == fpr:
1871
client = c
1872
break
1873
else:
1874
logger.info("Client not found for fingerprint: %s, ad"
1875
"dress: %s", fpr, address)
1876
if self.use_dbus:
1877
# Emit D-Bus signal
1878
mandos_dbus_service.ClientNotFound(fpr,
1879
address[0])
1880
parent_pipe.send(False)
1881
return False
1882
1883
gobject.io_add_watch(parent_pipe.fileno(),
1884
gobject.IO_IN | gobject.IO_HUP,
1885
functools.partial(self.handle_ipc,
1886
parent_pipe =
1887
parent_pipe,
1888
proc = proc,
1889
client_object =
1890
client))
1891
parent_pipe.send(True)
1892
# remove the old hook in favor of the new above hook on
1893
# same fileno
1894
return False
1895
if command == 'funcall':
1896
funcname = request[1]
1897
args = request[2]
1898
kwargs = request[3]
1899
1900
parent_pipe.send(('data', getattr(client_object,
1901
funcname)(*args,
1902
**kwargs)))
1903
1904
if command == 'getattr':
1905
attrname = request[1]
1906
if callable(client_object.__getattribute__(attrname)):
1907
parent_pipe.send(('function',))
1908
else:
1909
parent_pipe.send(('data', client_object
1910
.__getattribute__(attrname)))
1911
1912
if command == 'setattr':
1913
attrname = request[1]
1914
value = request[2]
1915
setattr(client_object, attrname, value)
1916
1288
1917
return True
1289
1918
1290
1919
1291
1920
def string_to_delta(interval):
1292
1921
"""Parse a string and return a datetime.timedelta
1293
1922
1294
>>> string_to_delta(u'7d')
1923
>>> string_to_delta('7d')
1295
1924
datetime.timedelta(7)
1296
>>> string_to_delta(u'60s')
1925
>>> string_to_delta('60s')
1297
1926
datetime.timedelta(0, 60)
1298
>>> string_to_delta(u'60m')
1927
>>> string_to_delta('60m')
1299
1928
datetime.timedelta(0, 3600)
1300
>>> string_to_delta(u'24h')
1929
>>> string_to_delta('24h')
1301
1930
datetime.timedelta(1)
1302
>>> string_to_delta(u'1w')
1931
>>> string_to_delta('1w')
1303
1932
datetime.timedelta(7)
1304
>>> string_to_delta(u'5m 30s')
1933
>>> string_to_delta('5m 30s')
1305
1934
datetime.timedelta(0, 330)
1306
1935
"""
1307
1936
timevalue = datetime.timedelta(0)
1309
1938
try:
1310
1939
suffix = unicode(s[-1])
1311
1940
value = int(s[:-1])
1312
if suffix == u"d":
1941
if suffix == "d":
1313
1942
delta = datetime.timedelta(value)
1314
elif suffix == u"s":
1943
elif suffix == "s":
1315
1944
delta = datetime.timedelta(0, value)
1316
elif suffix == u"m":
1945
elif suffix == "m":
1317
1946
delta = datetime.timedelta(0, 0, 0, 0, value)
1318
elif suffix == u"h":
1947
elif suffix == "h":
1319
1948
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1320
elif suffix == u"w":
1949
elif suffix == "w":
1321
1950
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1322
1951
else:
1323
raise ValueError
1324
except (ValueError, IndexError):
1325
raise ValueError
1952
raise ValueError("Unknown suffix %r" % suffix)
1953
except (ValueError, IndexError) as e:
1954
raise ValueError(*(e.args))
1326
1955
timevalue += delta
1327
1956
return timevalue
1328
1957
1329
1958
1330
def if_nametoindex(interface):
1331
"""Call the C function if_nametoindex(), or equivalent
1332
1333
Note: This function cannot accept a unicode string."""
1334
global if_nametoindex
1335
try:
1336
if_nametoindex = (ctypes.cdll.LoadLibrary
1337
(ctypes.util.find_library(u"c"))
1338
.if_nametoindex)
1339
except (OSError, AttributeError):
1340
logger.warning(u"Doing if_nametoindex the hard way")
1341
def if_nametoindex(interface):
1342
"Get an interface index the hard way, i.e. using fcntl()"
1343
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1344
with closing(socket.socket()) as s:
1345
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1346
struct.pack(str(u"16s16x"),
1347
interface))
1348
interface_index = struct.unpack(str(u"I"),
1349
ifreq[16:20])[0]
1350
return interface_index
1351
return if_nametoindex(interface)
1352
1353
1354
1959
def daemon(nochdir = False, noclose = False):
1355
1960
"""See daemon(3). Standard BSD Unix function.
1356
1961
1359
1964
sys.exit()
1360
1965
os.setsid()
1361
1966
if not nochdir:
1362
os.chdir(u"/")
1967
os.chdir("/")
1363
1968
if os.fork():
1364
1969
sys.exit()
1365
1970
if not noclose:
1367
1972
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1368
1973
if not stat.S_ISCHR(os.fstat(null).st_mode):
1369
1974
raise OSError(errno.ENODEV,
1370
u"/dev/null not a character device")
1975
"%s not a character device"
1976
% os.path.devnull)
1371
1977
os.dup2(null, sys.stdin.fileno())
1372
1978
os.dup2(null, sys.stdout.fileno())
1373
1979
os.dup2(null, sys.stderr.fileno())
1380
1986
##################################################################
1381
1987
# Parsing of options, both command line and config file
1382
1988
1383
parser = optparse.OptionParser(version = "%%prog %s" % version)
1384
parser.add_option("-i", u"--interface", type=u"string",
1385
metavar="IF", help=u"Bind to interface IF")
1386
parser.add_option("-a", u"--address", type=u"string",
1387
help=u"Address to listen for requests on")
1388
parser.add_option("-p", u"--port", type=u"int",
1389
help=u"Port number to receive requests on")
1390
parser.add_option("--check", action=u"store_true",
1391
help=u"Run self-test")
1392
parser.add_option("--debug", action=u"store_true",
1393
help=u"Debug mode; run in foreground and log to"
1394
u" terminal")
1395
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1396
u" priority string (see GnuTLS documentation)")
1397
parser.add_option("--servicename", type=u"string",
1398
metavar=u"NAME", help=u"Zeroconf service name")
1399
parser.add_option("--configdir", type=u"string",
1400
default=u"/etc/mandos", metavar=u"DIR",
1401
help=u"Directory to search for configuration"
1402
u" files")
1403
parser.add_option("--no-dbus", action=u"store_false",
1404
dest=u"use_dbus", help=u"Do not provide D-Bus"
1405
u" system bus interface")
1406
parser.add_option("--no-ipv6", action=u"store_false",
1407
dest=u"use_ipv6", help=u"Do not use IPv6")
1408
options = parser.parse_args()[0]
1989
parser = argparse.ArgumentParser()
1990
parser.add_argument("-v", "--version", action="version",
1991
version = "%%(prog)s %s" % version,
1992
help="show version number and exit")
1993
parser.add_argument("-i", "--interface", metavar="IF",
1994
help="Bind to interface IF")
1995
parser.add_argument("-a", "--address",
1996
help="Address to listen for requests on")
1997
parser.add_argument("-p", "--port", type=int,
1998
help="Port number to receive requests on")
1999
parser.add_argument("--check", action="store_true",
2000
help="Run self-test")
2001
parser.add_argument("--debug", action="store_true",
2002
help="Debug mode; run in foreground and log"
2003
" to terminal")
2004
parser.add_argument("--debuglevel", metavar="LEVEL",
2005
help="Debug level for stdout output")
2006
parser.add_argument("--priority", help="GnuTLS"
2007
" priority string (see GnuTLS documentation)")
2008
parser.add_argument("--servicename",
2009
metavar="NAME", help="Zeroconf service name")
2010
parser.add_argument("--configdir",
2011
default="/etc/mandos", metavar="DIR",
2012
help="Directory to search for configuration"
2013
" files")
2014
parser.add_argument("--no-dbus", action="store_false",
2015
dest="use_dbus", help="Do not provide D-Bus"
2016
" system bus interface")
2017
parser.add_argument("--no-ipv6", action="store_false",
2018
dest="use_ipv6", help="Do not use IPv6")
2019
parser.add_argument("--no-restore", action="store_false",
2020
dest="restore", help="Do not restore stored"
2021
" state")
2022
parser.add_argument("--statedir", metavar="DIR",
2023
help="Directory to save/restore state in")
2024
2025
options = parser.parse_args()
1409
2026
1410
2027
if options.check:
1411
2028
import doctest
1413
2030
sys.exit()
1414
2031
1415
2032
# Default values for config file for server-global settings
1416
server_defaults = { u"interface": u"",
1417
u"address": u"",
1418
u"port": u"",
1419
u"debug": u"False",
1420
u"priority":
1421
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1422
u"servicename": u"Mandos",
1423
u"use_dbus": u"True",
1424
u"use_ipv6": u"True",
2033
server_defaults = { "interface": "",
2034
"address": "",
2035
"port": "",
2036
"debug": "False",
2037
"priority":
2038
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2039
"servicename": "Mandos",
2040
"use_dbus": "True",
2041
"use_ipv6": "True",
2042
"debuglevel": "",
2043
"restore": "True",
2044
"statedir": "/var/lib/mandos"
1425
2045
}
1426
2046
1427
2047
# Parse config file for server-global settings
1428
2048
server_config = configparser.SafeConfigParser(server_defaults)
1429
2049
del server_defaults
1430
2050
server_config.read(os.path.join(options.configdir,
1431
u"mandos.conf"))
2051
"mandos.conf"))
1432
2052
# Convert the SafeConfigParser object to a dict
1433
2053
server_settings = server_config.defaults()
1434
2054
# Use the appropriate methods on the non-string config options
1435
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1436
server_settings[option] = server_config.getboolean(u"DEFAULT",
2055
for option in ("debug", "use_dbus", "use_ipv6"):
2056
server_settings[option] = server_config.getboolean("DEFAULT",
1437
2057
option)
1438
2058
if server_settings["port"]:
1439
server_settings["port"] = server_config.getint(u"DEFAULT",
1440
u"port")
2059
server_settings["port"] = server_config.getint("DEFAULT",
2060
"port")
1441
2061
del server_config
1442
2062
1443
2063
# Override the settings from the config file with command line
1444
2064
# options, if set.
1445
for option in (u"interface", u"address", u"port", u"debug",
1446
u"priority", u"servicename", u"configdir",
1447
u"use_dbus", u"use_ipv6"):
2065
for option in ("interface", "address", "port", "debug",
2066
"priority", "servicename", "configdir",
2067
"use_dbus", "use_ipv6", "debuglevel", "restore",
2068
"statedir"):
1448
2069
value = getattr(options, option)
1449
2070
if value is not None:
1450
2071
server_settings[option] = value
1458
2079
##################################################################
1459
2080
1460
2081
# For convenience
1461
debug = server_settings[u"debug"]
1462
use_dbus = server_settings[u"use_dbus"]
1463
use_ipv6 = server_settings[u"use_ipv6"]
1464
1465
if not debug:
1466
syslogger.setLevel(logging.WARNING)
1467
console.setLevel(logging.WARNING)
1468
1469
if server_settings[u"servicename"] != u"Mandos":
2082
debug = server_settings["debug"]
2083
debuglevel = server_settings["debuglevel"]
2084
use_dbus = server_settings["use_dbus"]
2085
use_ipv6 = server_settings["use_ipv6"]
2086
stored_state_path = os.path.join(server_settings["statedir"],
2087
stored_state_file)
2088
2089
if debug:
2090
initlogger(debug, logging.DEBUG)
2091
else:
2092
if not debuglevel:
2093
initlogger(debug)
2094
else:
2095
level = getattr(logging, debuglevel.upper())
2096
initlogger(debug, level)
2097
2098
if server_settings["servicename"] != "Mandos":
1470
2099
syslogger.setFormatter(logging.Formatter
1471
(u'Mandos (%s) [%%(process)d]:'
1472
u' %%(levelname)s: %%(message)s'
1473
% server_settings[u"servicename"]))
2100
('Mandos (%s) [%%(process)d]:'
2101
' %%(levelname)s: %%(message)s'
2102
% server_settings["servicename"]))
1474
2103
1475
2104
# Parse config file with clients
1476
client_defaults = { u"timeout": u"1h",
1477
u"interval": u"5m",
1478
u"checker": u"fping -q -- %%(host)s",
1479
u"host": u"",
1480
}
1481
client_config = configparser.SafeConfigParser(client_defaults)
1482
client_config.read(os.path.join(server_settings[u"configdir"],
1483
u"clients.conf"))
2105
client_config = configparser.SafeConfigParser(Client
2106
.client_defaults)
2107
client_config.read(os.path.join(server_settings["configdir"],
2108
"clients.conf"))
1484
2109
1485
2110
global mandos_dbus_service
1486
2111
mandos_dbus_service = None
1487
2112
1488
tcp_server = MandosServer((server_settings[u"address"],
1489
server_settings[u"port"]),
2113
tcp_server = MandosServer((server_settings["address"],
2114
server_settings["port"]),
1490
2115
ClientHandler,
1491
interface=server_settings[u"interface"],
2116
interface=(server_settings["interface"]
2117
or None),
1492
2118
use_ipv6=use_ipv6,
1493
2119
gnutls_priority=
1494
server_settings[u"priority"],
2120
server_settings["priority"],
1495
2121
use_dbus=use_dbus)
1496
pidfilename = u"/var/run/mandos.pid"
1497
try:
1498
pidfile = open(pidfilename, u"w")
1499
except IOError:
1500
logger.error(u"Could not open file %r", pidfilename)
2122
if not debug:
2123
pidfilename = "/var/run/mandos.pid"
2124
try:
2125
pidfile = open(pidfilename, "w")
2126
except IOError:
2127
logger.error("Could not open file %r", pidfilename)
1501
2128
1502
2129
try:
1503
uid = pwd.getpwnam(u"_mandos").pw_uid
1504
gid = pwd.getpwnam(u"_mandos").pw_gid
2130
uid = pwd.getpwnam("_mandos").pw_uid
2131
gid = pwd.getpwnam("_mandos").pw_gid
1505
2132
except KeyError:
1506
2133
try:
1507
uid = pwd.getpwnam(u"mandos").pw_uid
1508
gid = pwd.getpwnam(u"mandos").pw_gid
2134
uid = pwd.getpwnam("mandos").pw_uid
2135
gid = pwd.getpwnam("mandos").pw_gid
1509
2136
except KeyError:
1510
2137
try:
1511
uid = pwd.getpwnam(u"nobody").pw_uid
1512
gid = pwd.getpwnam(u"nobody").pw_gid
2138
uid = pwd.getpwnam("nobody").pw_uid
2139
gid = pwd.getpwnam("nobody").pw_gid
1513
2140
except KeyError:
1514
2141
uid = 65534
1515
2142
gid = 65534
1516
2143
try:
1517
2144
os.setgid(gid)
1518
2145
os.setuid(uid)
1519
except OSError, error:
2146
except OSError as error:
1520
2147
if error[0] != errno.EPERM:
1521
2148
raise error
1522
2149
1523
# Enable all possible GnuTLS debugging
1524
2150
if debug:
2151
# Enable all possible GnuTLS debugging
2152
1525
2153
# "Use a log level over 10 to enable all debugging options."
1526
2154
# - GnuTLS manual
1527
2155
gnutls.library.functions.gnutls_global_set_log_level(11)
1528
2156
1529
2157
@gnutls.library.types.gnutls_log_func
1530
2158
def debug_gnutls(level, string):
1531
logger.debug(u"GnuTLS: %s", string[:-1])
2159
logger.debug("GnuTLS: %s", string[:-1])
1532
2160
1533
2161
(gnutls.library.functions
1534
2162
.gnutls_global_set_log_function(debug_gnutls))
2163
2164
# Redirect stdin so all checkers get /dev/null
2165
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2166
os.dup2(null, sys.stdin.fileno())
2167
if null > 2:
2168
os.close(null)
2169
2170
# Need to fork before connecting to D-Bus
2171
if not debug:
2172
# Close all input and output, do double fork, etc.
2173
daemon()
2174
2175
gobject.threads_init()
1535
2176
1536
2177
global main_loop
1537
2178
# From the Avahi example code
1540
2181
bus = dbus.SystemBus()
1541
2182
# End of Avahi example code
1542
2183
if use_dbus:
1543
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2184
try:
2185
bus_name = dbus.service.BusName("se.recompile.Mandos",
2186
bus, do_not_queue=True)
2187
old_bus_name = (dbus.service.BusName
2188
("se.bsnet.fukt.Mandos", bus,
2189
do_not_queue=True))
2190
except dbus.exceptions.NameExistsException as e:
2191
logger.error(unicode(e) + ", disabling D-Bus")
2192
use_dbus = False
2193
server_settings["use_dbus"] = False
2194
tcp_server.use_dbus = False
1544
2195
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1545
service = AvahiService(name = server_settings[u"servicename"],
1546
servicetype = u"_mandos._tcp",
1547
protocol = protocol, bus = bus)
2196
service = AvahiServiceToSyslog(name =
2197
server_settings["servicename"],
2198
servicetype = "_mandos._tcp",
2199
protocol = protocol, bus = bus)
1548
2200
if server_settings["interface"]:
1549
2201
service.interface = (if_nametoindex
1550
(str(server_settings[u"interface"])))
2202
(str(server_settings["interface"])))
2203
2204
global multiprocessing_manager
2205
multiprocessing_manager = multiprocessing.Manager()
1551
2206
1552
2207
client_class = Client
1553
2208
if use_dbus:
1554
client_class = functools.partial(ClientDBus, bus = bus)
1555
tcp_server.clients.update(set(
1556
client_class(name = section,
1557
config= dict(client_config.items(section)))
1558
for section in client_config.sections()))
2209
client_class = functools.partial(ClientDBusTransitional,
2210
bus = bus)
2211
2212
client_settings = Client.config_parser(client_config)
2213
old_client_settings = {}
2214
clients_data = {}
2215
2216
# Get client data and settings from last running state.
2217
if server_settings["restore"]:
2218
try:
2219
with open(stored_state_path, "rb") as stored_state:
2220
clients_data, old_client_settings = (pickle.load
2221
(stored_state))
2222
os.remove(stored_state_path)
2223
except IOError as e:
2224
logger.warning("Could not load persistent state: {0}"
2225
.format(e))
2226
if e.errno != errno.ENOENT:
2227
raise
2228
except EOFError as e:
2229
logger.warning("Could not load persistent state: "
2230
"EOFError: {0}".format(e))
2231
2232
with PGPEngine() as pgp:
2233
for client_name, client in clients_data.iteritems():
2234
# Decide which value to use after restoring saved state.
2235
# We have three different values: Old config file,
2236
# new config file, and saved state.
2237
# New config value takes precedence if it differs from old
2238
# config value, otherwise use saved state.
2239
for name, value in client_settings[client_name].items():
2240
try:
2241
# For each value in new config, check if it
2242
# differs from the old config value (Except for
2243
# the "secret" attribute)
2244
if (name != "secret" and
2245
value != old_client_settings[client_name]
2246
[name]):
2247
client[name] = value
2248
except KeyError:
2249
pass
2250
2251
# Clients who has passed its expire date can still be
2252
# enabled if its last checker was successful. Clients
2253
# whose checker failed before we stored its state is
2254
# assumed to have failed all checkers during downtime.
2255
if client["enabled"]:
2256
if datetime.datetime.utcnow() >= client["expires"]:
2257
if not client["last_checked_ok"]:
2258
logger.warning(
2259
"disabling client {0} - Client never "
2260
"performed a successfull checker"
2261
.format(client["name"]))
2262
client["enabled"] = False
2263
elif client["last_checker_status"] != 0:
2264
logger.warning(
2265
"disabling client {0} - Client "
2266
"last checker failed with error code {1}"
2267
.format(client["name"],
2268
client["last_checker_status"]))
2269
client["enabled"] = False
2270
else:
2271
client["expires"] = (datetime.datetime
2272
.utcnow()
2273
+ client["timeout"])
2274
logger.debug("Last checker succeeded,"
2275
" keeping {0} enabled"
2276
.format(client["name"]))
2277
try:
2278
client["secret"] = (
2279
pgp.decrypt(client["encrypted_secret"],
2280
client_settings[client_name]
2281
["secret"]))
2282
except PGPError:
2283
# If decryption fails, we use secret from new settings
2284
logger.debug("Failed to decrypt {0} old secret"
2285
.format(client_name))
2286
client["secret"] = (
2287
client_settings[client_name]["secret"])
2288
2289
2290
# Add/remove clients based on new changes made to config
2291
for client_name in (set(old_client_settings)
2292
- set(client_settings)):
2293
del clients_data[client_name]
2294
for client_name in (set(client_settings)
2295
- set(old_client_settings)):
2296
clients_data[client_name] = client_settings[client_name]
2297
2298
# Create clients all clients
2299
for client_name, client in clients_data.iteritems():
2300
tcp_server.clients[client_name] = client_class(
2301
name = client_name, settings = client)
2302
1559
2303
if not tcp_server.clients:
1560
logger.warning(u"No clients defined")
1561
1562
if debug:
1563
# Redirect stdin so all checkers get /dev/null
1564
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1565
os.dup2(null, sys.stdin.fileno())
1566
if null > 2:
1567
os.close(null)
1568
else:
1569
# No console logging
1570
logger.removeHandler(console)
1571
# Close all input and output, do double fork, etc.
1572
daemon()
1573
1574
try:
1575
with closing(pidfile):
1576
pid = os.getpid()
1577
pidfile.write(str(pid) + "\n")
1578
del pidfile
1579
except IOError:
1580
logger.error(u"Could not write to file %r with PID %d",
1581
pidfilename, pid)
1582
except NameError:
1583
# "pidfile" was never created
1584
pass
1585
del pidfilename
1586
1587
def cleanup():
1588
"Cleanup function; run on exit"
1589
service.cleanup()
2304
logger.warning("No clients defined")
1590
2305
1591
while tcp_server.clients:
1592
client = tcp_server.clients.pop()
1593
client.disable_hook = None
1594
client.disable()
1595
1596
atexit.register(cleanup)
1597
1598
2306
if not debug:
2307
try:
2308
with pidfile:
2309
pid = os.getpid()
2310
pidfile.write(str(pid) + "\n".encode("utf-8"))
2311
del pidfile
2312
except IOError:
2313
logger.error("Could not write to file %r with PID %d",
2314
pidfilename, pid)
2315
except NameError:
2316
# "pidfile" was never created
2317
pass
2318
del pidfilename
1599
2319
signal.signal(signal.SIGINT, signal.SIG_IGN)
2320
1600
2321
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1601
2322
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1602
2323
1604
2325
class MandosDBusService(dbus.service.Object):
1605
2326
"""A D-Bus proxy object"""
1606
2327
def __init__(self):
1607
dbus.service.Object.__init__(self, bus, u"/")
1608
_interface = u"se.bsnet.fukt.Mandos"
1609
1610
@dbus.service.signal(_interface, signature=u"oa{sv}")
1611
def ClientAdded(self, objpath, properties):
1612
"D-Bus signal"
1613
pass
1614
1615
@dbus.service.signal(_interface, signature=u"s")
1616
def ClientNotFound(self, fingerprint):
1617
"D-Bus signal"
1618
pass
1619
1620
@dbus.service.signal(_interface, signature=u"os")
2328
dbus.service.Object.__init__(self, bus, "/")
2329
_interface = "se.recompile.Mandos"
2330
2331
@dbus.service.signal(_interface, signature="o")
2332
def ClientAdded(self, objpath):
2333
"D-Bus signal"
2334
pass
2335
2336
@dbus.service.signal(_interface, signature="ss")
2337
def ClientNotFound(self, fingerprint, address):
2338
"D-Bus signal"
2339
pass
2340
2341
@dbus.service.signal(_interface, signature="os")
1621
2342
def ClientRemoved(self, objpath, name):
1622
2343
"D-Bus signal"
1623
2344
pass
1624
2345
1625
@dbus.service.method(_interface, out_signature=u"ao")
2346
@dbus.service.method(_interface, out_signature="ao")
1626
2347
def GetAllClients(self):
1627
2348
"D-Bus method"
1628
2349
return dbus.Array(c.dbus_object_path
1629
for c in tcp_server.clients)
2350
for c in
2351
tcp_server.clients.itervalues())
1630
2352
1631
2353
@dbus.service.method(_interface,
1632
out_signature=u"a{oa{sv}}")
2354
out_signature="a{oa{sv}}")
1633
2355
def GetAllClientsWithProperties(self):
1634
2356
"D-Bus method"
1635
2357
return dbus.Dictionary(
1636
((c.dbus_object_path, c.GetAll(u""))
1637
for c in tcp_server.clients),
1638
signature=u"oa{sv}")
2358
((c.dbus_object_path, c.GetAll(""))
2359
for c in tcp_server.clients.itervalues()),
2360
signature="oa{sv}")
1639
2361
1640
@dbus.service.method(_interface, in_signature=u"o")
2362
@dbus.service.method(_interface, in_signature="o")
1641
2363
def RemoveClient(self, object_path):
1642
2364
"D-Bus method"
1643
for c in tcp_server.clients:
2365
for c in tcp_server.clients.itervalues():
1644
2366
if c.dbus_object_path == object_path:
1645
tcp_server.clients.remove(c)
2367
del tcp_server.clients[c.name]
1646
2368
c.remove_from_connection()
1647
2369
# Don't signal anything except ClientRemoved
1648
c.disable(signal=False)
2370
c.disable(quiet=True)
1649
2371
# Emit D-Bus signal
1650
2372
self.ClientRemoved(object_path, c.name)
1651
2373
return
1652
raise KeyError
2374
raise KeyError(object_path)
1653
2375
1654
2376
del _interface
1655
2377
1656
mandos_dbus_service = MandosDBusService()
1657
1658
for client in tcp_server.clients:
2378
class MandosDBusServiceTransitional(MandosDBusService):
2379
__metaclass__ = AlternateDBusNamesMetaclass
2380
mandos_dbus_service = MandosDBusServiceTransitional()
2381
2382
def cleanup():
2383
"Cleanup function; run on exit"
2384
service.cleanup()
2385
2386
multiprocessing.active_children()
2387
if not (tcp_server.clients or client_settings):
2388
return
2389
2390
# Store client before exiting. Secrets are encrypted with key
2391
# based on what config file has. If config file is
2392
# removed/edited, old secret will thus be unrecovable.
2393
clients = {}
2394
with PGPEngine() as pgp:
2395
for client in tcp_server.clients.itervalues():
2396
key = client_settings[client.name]["secret"]
2397
client.encrypted_secret = pgp.encrypt(client.secret,
2398
key)
2399
client_dict = {}
2400
2401
# A list of attributes that can not be pickled
2402
# + secret.
2403
exclude = set(("bus", "changedstate", "secret",
2404
"checker"))
2405
for name, typ in (inspect.getmembers
2406
(dbus.service.Object)):
2407
exclude.add(name)
2408
2409
client_dict["encrypted_secret"] = (client
2410
.encrypted_secret)
2411
for attr in client.client_structure:
2412
if attr not in exclude:
2413
client_dict[attr] = getattr(client, attr)
2414
2415
clients[client.name] = client_dict
2416
del client_settings[client.name]["secret"]
2417
2418
try:
2419
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2420
prefix="clients-",
2421
dir=os.path.dirname
2422
(stored_state_path))
2423
with os.fdopen(tempfd, "wb") as stored_state:
2424
pickle.dump((clients, client_settings), stored_state)
2425
os.rename(tempname, stored_state_path)
2426
except (IOError, OSError) as e:
2427
logger.warning("Could not save persistent state: {0}"
2428
.format(e))
2429
if not debug:
2430
try:
2431
os.remove(tempname)
2432
except NameError:
2433
pass
2434
if e.errno not in set((errno.ENOENT, errno.EACCES,
2435
errno.EEXIST)):
2436
raise e
2437
2438
# Delete all clients, and settings from config
2439
while tcp_server.clients:
2440
name, client = tcp_server.clients.popitem()
2441
if use_dbus:
2442
client.remove_from_connection()
2443
# Don't signal anything except ClientRemoved
2444
client.disable(quiet=True)
2445
if use_dbus:
2446
# Emit D-Bus signal
2447
mandos_dbus_service.ClientRemoved(client
2448
.dbus_object_path,
2449
client.name)
2450
client_settings.clear()
2451
2452
atexit.register(cleanup)
2453
2454
for client in tcp_server.clients.itervalues():
1659
2455
if use_dbus:
1660
2456
# Emit D-Bus signal
1661
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1662
client.GetAll(u""))
1663
client.enable()
2457
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2458
# Need to initiate checking of clients
2459
if client.enabled:
2460
client.init_checker()
1664
2461
1665
2462
tcp_server.enable()
1666
2463
tcp_server.server_activate()
1668
2465
# Find out what port we got
1669
2466
service.port = tcp_server.socket.getsockname()[1]
1670
2467
if use_ipv6:
1671
logger.info(u"Now listening on address %r, port %d,"
2468
logger.info("Now listening on address %r, port %d,"
1672
2469
" flowinfo %d, scope_id %d"
1673
2470
% tcp_server.socket.getsockname())
1674
2471
else: # IPv4
1675
logger.info(u"Now listening on address %r, port %d"
2472
logger.info("Now listening on address %r, port %d"
1676
2473
% tcp_server.socket.getsockname())
1677
2474
1678
2475
#service.interface = tcp_server.socket.getsockname()[3]
1681
2478
# From the Avahi example code
1682
2479
try:
1683
2480
service.activate()
1684
except dbus.exceptions.DBusException, error:
1685
logger.critical(u"DBusException: %s", error)
2481
except dbus.exceptions.DBusException as error:
2482
logger.critical("DBusException: %s", error)
2483
cleanup()
1686
2484
sys.exit(1)
1687
2485
# End of Avahi example code
1688
2486
1691
2489
(tcp_server.handle_request
1692
2490
(*args[2:], **kwargs) or True))
1693
2491
1694
logger.debug(u"Starting main loop")
2492
logger.debug("Starting main loop")
1695
2493
main_loop.run()
1696
except AvahiError, error:
1697
logger.critical(u"AvahiError: %s", error)
2494
except AvahiError as error:
2495
logger.critical("AvahiError: %s", error)
2496
cleanup()
1698
2497
sys.exit(1)
1699
2498
except KeyboardInterrupt:
1700
2499
if debug:
1701
print >> sys.stderr
1702
logger.debug(u"Server received KeyboardInterrupt")
1703
logger.debug(u"Server exiting")
2500
print("", file=sys.stderr)
2501
logger.debug("Server received KeyboardInterrupt")
2502
logger.debug("Server exiting")
2503
# Must run before the D-Bus bus name gets deregistered
2504
cleanup()
1704
2505
1705
2506
if __name__ == '__main__':
1706
2507
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0