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- Committer: Teddy Hogeborn
- Date: 2011-11-27 19:37:54 UTC
- mto: (237.12.11 mandos-persistent)
- mto: This revision was merged to the branch mainline in revision 290.
- Revision ID: teddy@recompile.se-20111127193754-4366e18gmi11kew0
* mandos (_timedelta_to_milliseconds): Renamed to
"timedelta_to_milliseconds";
all callers changed.
(Client._approved): Bug fix; renamed to "approved" without
underscore. All users changed.
(ProxyClient): Removed superfluous parens in "if" statements.
(ClientHandler.handle): Bug fix: Emit NewRequest signal *after*
client is found, not before.
"timedelta_to_milliseconds";
all callers changed.
(Client._approved): Bug fix; renamed to "approved" without
underscore. All users changed.
(ProxyClient): Removed superfluous parens in "if" statements.
(ClientHandler.handle): Bug fix: Emit NewRequest signal *after*
client is found, not before.
- files added:
- DBUS-API
- debian/source
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
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# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
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#
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
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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
67
73
from dbus.mainloop.glib import DBusGMainLoop
68
74
import ctypes
69
75
import ctypes.util
76
import xml.dom.minidom
77
import inspect
78
import GnuPGInterface
70
79
71
80
try:
72
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
86
SO_BINDTODEVICE = None
78
87
79
88
80
version = "1.0.11"
89
version = "1.4.1"
90
stored_state_file = "clients.pickle"
81
91
82
logger = logging.Logger(u'mandos')
92
logger = logging.getLogger()
83
93
syslogger = (logging.handlers.SysLogHandler
84
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
85
address = "/dev/log"))
86
syslogger.setFormatter(logging.Formatter
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
u' %(message)s'))
89
logger.addHandler(syslogger)
90
91
console = logging.StreamHandler()
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
95
logger.addHandler(console)
95
address = str("/dev/log")))
96
97
try:
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.if_nametoindex)
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
108
interface))
109
interface_index = struct.unpack(str("I"),
110
ifreq[16:20])[0]
111
return interface_index
112
113
114
def initlogger(level=logging.WARNING):
115
"""init logger and add loglevel"""
116
117
syslogger.setFormatter(logging.Formatter
118
('Mandos [%(process)d]: %(levelname)s:'
119
' %(message)s'))
120
logger.addHandler(syslogger)
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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)
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logger.setLevel(level)
129
130
131
class CryptoError(Exception):
132
pass
133
134
135
class Crypto(object):
136
"""A simple class for OpenPGP symmetric encryption & decryption"""
137
def __init__(self):
138
self.gnupg = GnuPGInterface.GnuPG()
139
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.gnupg.options.meta_interactive = False
142
self.gnupg.options.homedir = self.tempdir
143
self.gnupg.options.extra_args.extend(['--force-mdc',
144
'--quiet'])
145
146
def __enter__(self):
147
return self
148
149
def __exit__ (self, exc_type, exc_value, traceback):
150
self._cleanup()
151
return False
152
153
def __del__(self):
154
self._cleanup()
155
156
def _cleanup(self):
157
if self.tempdir is not None:
158
# Delete contents of tempdir
159
for root, dirs, files in os.walk(self.tempdir,
160
topdown = False):
161
for filename in files:
162
os.remove(os.path.join(root, filename))
163
for dirname in dirs:
164
os.rmdir(os.path.join(root, dirname))
165
# Remove tempdir
166
os.rmdir(self.tempdir)
167
self.tempdir = None
168
169
def password_encode(self, password):
170
# Passphrase can not be empty and can not contain newlines or
171
# NUL bytes. So we prefix it and hex encode it.
172
return b"mandos" + binascii.hexlify(password)
173
174
def encrypt(self, data, password):
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
177
try:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
182
f.write(data)
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
185
proc.wait()
186
except IOError as e:
187
raise CryptoError(e)
188
self.gnupg.passphrase = None
189
return ciphertext
190
191
def decrypt(self, data, password):
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
194
try:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
199
f.write(data)
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
202
proc.wait()
203
except IOError as e:
204
raise CryptoError(e)
205
self.gnupg.passphrase = None
206
return decrypted_plaintext
207
208
96
209
97
210
class AvahiError(Exception):
98
211
def __init__(self, value, *args, **kwargs):
114
227
Attributes:
115
228
interface: integer; avahi.IF_UNSPEC or an interface index.
116
229
Used to optionally bind to the specified interface.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
230
name: string; Example: 'Mandos'
231
type: string; Example: '_mandos._tcp'.
119
232
See <http://www.dns-sd.org/ServiceTypes.html>
120
233
port: integer; what port to announce
121
234
TXT: list of strings; TXT record for the service
130
243
"""
131
244
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
132
245
servicetype = None, port = None, TXT = None,
133
domain = u"", host = u"", max_renames = 32768,
246
domain = "", host = "", max_renames = 32768,
134
247
protocol = avahi.PROTO_UNSPEC, bus = None):
135
248
self.interface = interface
136
249
self.name = name
145
258
self.group = None # our entry group
146
259
self.server = None
147
260
self.bus = bus
261
self.entry_group_state_changed_match = None
148
262
def rename(self):
149
263
"""Derived from the Avahi example code"""
150
264
if self.rename_count >= self.max_renames:
151
logger.critical(u"No suitable Zeroconf service name found"
152
u" after %i retries, exiting.",
265
logger.critical("No suitable Zeroconf service name found"
266
" after %i retries, exiting.",
153
267
self.rename_count)
154
raise AvahiServiceError(u"Too many renames")
155
self.name = self.server.GetAlternativeServiceName(self.name)
156
logger.info(u"Changing Zeroconf service name to %r ...",
157
unicode(self.name))
158
syslogger.setFormatter(logging.Formatter
159
(u'Mandos (%s) [%%(process)d]:'
160
u' %%(levelname)s: %%(message)s'
161
% self.name))
268
raise AvahiServiceError("Too many renames")
269
self.name = unicode(self.server
270
.GetAlternativeServiceName(self.name))
271
logger.info("Changing Zeroconf service name to %r ...",
272
self.name)
162
273
self.remove()
163
self.add()
274
try:
275
self.add()
276
except dbus.exceptions.DBusException as error:
277
logger.critical("DBusException: %s", error)
278
self.cleanup()
279
os._exit(1)
164
280
self.rename_count += 1
165
281
def remove(self):
166
282
"""Derived from the Avahi example code"""
283
if self.entry_group_state_changed_match is not None:
284
self.entry_group_state_changed_match.remove()
285
self.entry_group_state_changed_match = None
167
286
if self.group is not None:
168
287
self.group.Reset()
169
288
def add(self):
170
289
"""Derived from the Avahi example code"""
290
self.remove()
171
291
if self.group is None:
172
292
self.group = dbus.Interface(
173
293
self.bus.get_object(avahi.DBUS_NAME,
174
294
self.server.EntryGroupNew()),
175
295
avahi.DBUS_INTERFACE_ENTRY_GROUP)
176
self.group.connect_to_signal('StateChanged',
177
self.entry_group_state_changed)
178
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
296
self.entry_group_state_changed_match = (
297
self.group.connect_to_signal(
298
'StateChanged', self.entry_group_state_changed))
299
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
179
300
self.name, self.type)
180
301
self.group.AddService(
181
302
self.interface,
188
309
self.group.Commit()
189
310
def entry_group_state_changed(self, state, error):
190
311
"""Derived from the Avahi example code"""
191
logger.debug(u"Avahi state change: %i", state)
312
logger.debug("Avahi entry group state change: %i", state)
192
313
193
314
if state == avahi.ENTRY_GROUP_ESTABLISHED:
194
logger.debug(u"Zeroconf service established.")
315
logger.debug("Zeroconf service established.")
195
316
elif state == avahi.ENTRY_GROUP_COLLISION:
196
logger.warning(u"Zeroconf service name collision.")
317
logger.info("Zeroconf service name collision.")
197
318
self.rename()
198
319
elif state == avahi.ENTRY_GROUP_FAILURE:
199
logger.critical(u"Avahi: Error in group state changed %s",
320
logger.critical("Avahi: Error in group state changed %s",
200
321
unicode(error))
201
raise AvahiGroupError(u"State changed: %s"
322
raise AvahiGroupError("State changed: %s"
202
323
% unicode(error))
203
324
def cleanup(self):
204
325
"""Derived from the Avahi example code"""
205
326
if self.group is not None:
206
self.group.Free()
327
try:
328
self.group.Free()
329
except (dbus.exceptions.UnknownMethodException,
330
dbus.exceptions.DBusException):
331
pass
207
332
self.group = None
208
def server_state_changed(self, state):
333
self.remove()
334
def server_state_changed(self, state, error=None):
209
335
"""Derived from the Avahi example code"""
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
212
self.remove()
336
logger.debug("Avahi server state change: %i", state)
337
bad_states = { avahi.SERVER_INVALID:
338
"Zeroconf server invalid",
339
avahi.SERVER_REGISTERING: None,
340
avahi.SERVER_COLLISION:
341
"Zeroconf server name collision",
342
avahi.SERVER_FAILURE:
343
"Zeroconf server failure" }
344
if state in bad_states:
345
if bad_states[state] is not None:
346
if error is None:
347
logger.error(bad_states[state])
348
else:
349
logger.error(bad_states[state] + ": %r", error)
350
self.cleanup()
213
351
elif state == avahi.SERVER_RUNNING:
214
352
self.add()
353
else:
354
if error is None:
355
logger.debug("Unknown state: %r", state)
356
else:
357
logger.debug("Unknown state: %r: %r", state, error)
215
358
def activate(self):
216
359
"""Derived from the Avahi example code"""
217
360
if self.server is None:
218
361
self.server = dbus.Interface(
219
362
self.bus.get_object(avahi.DBUS_NAME,
220
avahi.DBUS_PATH_SERVER),
363
avahi.DBUS_PATH_SERVER,
364
follow_name_owner_changes=True),
221
365
avahi.DBUS_INTERFACE_SERVER)
222
self.server.connect_to_signal(u"StateChanged",
366
self.server.connect_to_signal("StateChanged",
223
367
self.server_state_changed)
224
368
self.server_state_changed(self.server.GetState())
225
369
370
class AvahiServiceToSyslog(AvahiService):
371
def rename(self):
372
"""Add the new name to the syslog messages"""
373
ret = AvahiService.rename(self)
374
syslogger.setFormatter(logging.Formatter
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
377
% self.name))
378
return ret
226
379
380
def timedelta_to_milliseconds(td):
381
"Convert a datetime.timedelta() to milliseconds"
382
return ((td.days * 24 * 60 * 60 * 1000)
383
+ (td.seconds * 1000)
384
+ (td.microseconds // 1000))
385
227
386
class Client(object):
228
387
"""A representation of a client host served by this server.
229
388
230
389
Attributes:
231
name: string; from the config file, used in log messages and
232
D-Bus identifiers
233
fingerprint: string (40 or 32 hexadecimal digits); used to
234
uniquely identify the client
235
secret: bytestring; sent verbatim (over TLS) to client
236
host: string; available for use by the checker command
237
created: datetime.datetime(); (UTC) object creation
238
last_enabled: datetime.datetime(); (UTC)
239
enabled: bool()
240
last_checked_ok: datetime.datetime(); (UTC) or None
241
timeout: datetime.timedelta(); How long from last_checked_ok
242
until this client is invalid
243
interval: datetime.timedelta(); How often to start a new checker
244
disable_hook: If set, called by disable() as disable_hook(self)
390
approved: bool(); 'None' if not yet approved/disapproved
391
approval_delay: datetime.timedelta(); Time to wait for approval
392
approval_duration: datetime.timedelta(); Duration of one approval
245
393
checker: subprocess.Popen(); a running checker process used
246
394
to see if the client lives.
247
395
'None' if no process is running.
248
checker_initiator_tag: a gobject event source tag, or None
249
disable_initiator_tag: - '' -
250
checker_callback_tag: - '' -
251
checker_command: string; External command which is run to check if
252
client lives. %() expansions are done at
396
checker_callback_tag: a gobject event source tag, or None
397
checker_command: string; External command which is run to check
398
if client lives. %() expansions are done at
253
399
runtime with vars(self) as dict, so that for
254
400
instance %(name)s can be used in the command.
401
checker_initiator_tag: a gobject event source tag, or None
402
created: datetime.datetime(); (UTC) object creation
403
client_structure: Object describing what attributes a client has
404
and is used for storing the client at exit
255
405
current_checker_command: string; current running checker_command
406
disable_initiator_tag: a gobject event source tag, or None
407
enabled: bool()
408
fingerprint: string (40 or 32 hexadecimal digits); used to
409
uniquely identify the client
410
host: string; available for use by the checker command
411
interval: datetime.timedelta(); How often to start a new checker
412
last_approval_request: datetime.datetime(); (UTC) or None
413
last_checked_ok: datetime.datetime(); (UTC) or None
414
415
last_checker_status: integer between 0 and 255 reflecting exit
416
status of last checker. -1 reflects crashed
417
checker, or None.
418
last_enabled: datetime.datetime(); (UTC) or None
419
name: string; from the config file, used in log messages and
420
D-Bus identifiers
421
secret: bytestring; sent verbatim (over TLS) to client
422
timeout: datetime.timedelta(); How long from last_checked_ok
423
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
425
runtime_expansions: Allowed attributes for runtime expansion.
426
expires: datetime.datetime(); time (UTC) when a client will be
427
disabled, or None
256
428
"""
257
429
258
@staticmethod
259
def _datetime_to_milliseconds(dt):
260
"Convert a datetime.datetime() to milliseconds"
261
return ((dt.days * 24 * 60 * 60 * 1000)
262
+ (dt.seconds * 1000)
263
+ (dt.microseconds // 1000))
430
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
433
"last_enabled", "name", "timeout")
264
434
265
435
def timeout_milliseconds(self):
266
436
"Return the 'timeout' attribute in milliseconds"
267
return self._datetime_to_milliseconds(self.timeout)
437
return timedelta_to_milliseconds(self.timeout)
438
439
def extended_timeout_milliseconds(self):
440
"Return the 'extended_timeout' attribute in milliseconds"
441
return timedelta_to_milliseconds(self.extended_timeout)
268
442
269
443
def interval_milliseconds(self):
270
444
"Return the 'interval' attribute in milliseconds"
271
return self._datetime_to_milliseconds(self.interval)
272
273
def __init__(self, name = None, disable_hook=None, config=None):
445
return timedelta_to_milliseconds(self.interval)
446
447
def approval_delay_milliseconds(self):
448
return timedelta_to_milliseconds(self.approval_delay)
449
450
def __init__(self, name = None, config=None):
274
451
"""Note: the 'checker' key in 'config' sets the
275
452
'checker_command' attribute and *not* the 'checker'
276
453
attribute."""
277
454
self.name = name
278
455
if config is None:
279
456
config = {}
280
logger.debug(u"Creating client %r", self.name)
457
logger.debug("Creating client %r", self.name)
281
458
# Uppercase and remove spaces from fingerprint for later
282
459
# comparison purposes with return value from the fingerprint()
283
460
# function
284
self.fingerprint = (config[u"fingerprint"].upper()
285
.replace(u" ", u""))
286
logger.debug(u" Fingerprint: %s", self.fingerprint)
287
if u"secret" in config:
288
self.secret = config[u"secret"].decode(u"base64")
289
elif u"secfile" in config:
290
with closing(open(os.path.expanduser
291
(os.path.expandvars
292
(config[u"secfile"])))) as secfile:
461
self.fingerprint = (config["fingerprint"].upper()
462
.replace(" ", ""))
463
logger.debug(" Fingerprint: %s", self.fingerprint)
464
if "secret" in config:
465
self.secret = config["secret"].decode("base64")
466
elif "secfile" in config:
467
with open(os.path.expanduser(os.path.expandvars
468
(config["secfile"])),
469
"rb") as secfile:
293
470
self.secret = secfile.read()
294
471
else:
295
raise TypeError(u"No secret or secfile for client %s"
472
raise TypeError("No secret or secfile for client %s"
296
473
% self.name)
297
self.host = config.get(u"host", u"")
474
self.host = config.get("host", "")
298
475
self.created = datetime.datetime.utcnow()
299
self.enabled = False
300
self.last_enabled = None
476
self.enabled = config.get("enabled", True)
477
self.last_approval_request = None
478
if self.enabled:
479
self.last_enabled = datetime.datetime.utcnow()
480
else:
481
self.last_enabled = None
301
482
self.last_checked_ok = None
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
304
self.disable_hook = disable_hook
483
self.last_checker_status = None
484
self.timeout = string_to_delta(config["timeout"])
485
self.extended_timeout = string_to_delta(config
486
["extended_timeout"])
487
self.interval = string_to_delta(config["interval"])
305
488
self.checker = None
306
489
self.checker_initiator_tag = None
307
490
self.disable_initiator_tag = None
491
if self.enabled:
492
self.expires = datetime.datetime.utcnow() + self.timeout
493
else:
494
self.expires = None
308
495
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
496
self.checker_command = config["checker"]
310
497
self.current_checker_command = None
311
self.last_connect = None
498
self.approved = None
499
self.approved_by_default = config.get("approved_by_default",
500
True)
501
self.approvals_pending = 0
502
self.approval_delay = string_to_delta(
503
config["approval_delay"])
504
self.approval_duration = string_to_delta(
505
config["approval_duration"])
506
self.changedstate = (multiprocessing_manager
507
.Condition(multiprocessing_manager
508
.Lock()))
509
self.client_structure = [attr for attr in
510
self.__dict__.iterkeys()
511
if not attr.startswith("_")]
512
self.client_structure.append("client_structure")
513
514
for name, t in inspect.getmembers(type(self),
515
lambda obj:
516
isinstance(obj,
517
property)):
518
if not name.startswith("_"):
519
self.client_structure.append(name)
520
521
# Send notice to process children that client state has changed
522
def send_changedstate(self):
523
with self.changedstate:
524
self.changedstate.notify_all()
312
525
313
526
def enable(self):
314
527
"""Start this client's checker and timeout hooks"""
315
if getattr(self, u"enabled", False):
528
if getattr(self, "enabled", False):
316
529
# Already enabled
317
530
return
531
self.send_changedstate()
532
self.expires = datetime.datetime.utcnow() + self.timeout
533
self.enabled = True
318
534
self.last_enabled = datetime.datetime.utcnow()
535
self.init_checker()
536
537
def disable(self, quiet=True):
538
"""Disable this client."""
539
if not getattr(self, "enabled", False):
540
return False
541
if not quiet:
542
self.send_changedstate()
543
if not quiet:
544
logger.info("Disabling client %s", self.name)
545
if getattr(self, "disable_initiator_tag", False):
546
gobject.source_remove(self.disable_initiator_tag)
547
self.disable_initiator_tag = None
548
self.expires = None
549
if getattr(self, "checker_initiator_tag", False):
550
gobject.source_remove(self.checker_initiator_tag)
551
self.checker_initiator_tag = None
552
self.stop_checker()
553
self.enabled = False
554
# Do not run this again if called by a gobject.timeout_add
555
return False
556
557
def __del__(self):
558
self.disable()
559
560
def init_checker(self):
319
561
# Schedule a new checker to be started an 'interval' from now,
320
562
# and every interval from then on.
321
563
self.checker_initiator_tag = (gobject.timeout_add
322
564
(self.interval_milliseconds(),
323
565
self.start_checker))
324
# Also start a new checker *right now*.
325
self.start_checker()
326
566
# Schedule a disable() when 'timeout' has passed
327
567
self.disable_initiator_tag = (gobject.timeout_add
328
568
(self.timeout_milliseconds(),
329
569
self.disable))
330
self.enabled = True
331
332
def disable(self):
333
"""Disable this client."""
334
if not getattr(self, "enabled", False):
335
return False
336
logger.info(u"Disabling client %s", self.name)
337
if getattr(self, u"disable_initiator_tag", False):
338
gobject.source_remove(self.disable_initiator_tag)
339
self.disable_initiator_tag = None
340
if getattr(self, u"checker_initiator_tag", False):
341
gobject.source_remove(self.checker_initiator_tag)
342
self.checker_initiator_tag = None
343
self.stop_checker()
344
if self.disable_hook:
345
self.disable_hook(self)
346
self.enabled = False
347
# Do not run this again if called by a gobject.timeout_add
348
return False
349
350
def __del__(self):
351
self.disable_hook = None
352
self.disable()
570
# Also start a new checker *right now*.
571
self.start_checker()
353
572
354
573
def checker_callback(self, pid, condition, command):
355
574
"""The checker has completed, so take appropriate actions."""
356
575
self.checker_callback_tag = None
357
576
self.checker = None
358
577
if os.WIFEXITED(condition):
359
exitstatus = os.WEXITSTATUS(condition)
360
if exitstatus == 0:
361
logger.info(u"Checker for %(name)s succeeded",
578
self.last_checker_status = os.WEXITSTATUS(condition)
579
if self.last_checker_status == 0:
580
logger.info("Checker for %(name)s succeeded",
362
581
vars(self))
363
582
self.checked_ok()
364
583
else:
365
logger.info(u"Checker for %(name)s failed",
584
logger.info("Checker for %(name)s failed",
366
585
vars(self))
367
586
else:
368
logger.warning(u"Checker for %(name)s crashed?",
587
self.last_checker_status = -1
588
logger.warning("Checker for %(name)s crashed?",
369
589
vars(self))
370
590
371
def checked_ok(self):
591
def checked_ok(self, timeout=None):
372
592
"""Bump up the timeout for this client.
373
593
374
594
This should only be called when the client has been seen,
375
595
alive and well.
376
596
"""
597
if timeout is None:
598
timeout = self.timeout
377
599
self.last_checked_ok = datetime.datetime.utcnow()
378
gobject.source_remove(self.disable_initiator_tag)
379
self.disable_initiator_tag = (gobject.timeout_add
380
(self.timeout_milliseconds(),
381
self.disable))
600
if self.disable_initiator_tag is not None:
601
gobject.source_remove(self.disable_initiator_tag)
602
if getattr(self, "enabled", False):
603
self.disable_initiator_tag = (gobject.timeout_add
604
(timedelta_to_milliseconds
605
(timeout), self.disable))
606
self.expires = datetime.datetime.utcnow() + timeout
607
608
def need_approval(self):
609
self.last_approval_request = datetime.datetime.utcnow()
382
610
383
611
def start_checker(self):
384
612
"""Start a new checker subprocess if one is not running.
391
619
# client would inevitably timeout, since no checker would get
392
620
# a chance to run to completion. If we instead leave running
393
621
# checkers alone, the checker would have to take more time
394
# than 'timeout' for the client to be declared invalid, which
395
# is as it should be.
622
# than 'timeout' for the client to be disabled, which is as it
623
# should be.
396
624
397
625
# If a checker exists, make sure it is not a zombie
398
if self.checker is not None:
626
try:
399
627
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
628
except (AttributeError, OSError) as error:
629
if (isinstance(error, OSError)
630
and error.errno != errno.ECHILD):
631
raise error
632
else:
400
633
if pid:
401
logger.warning(u"Checker was a zombie")
634
logger.warning("Checker was a zombie")
402
635
gobject.source_remove(self.checker_callback_tag)
403
636
self.checker_callback(pid, status,
404
637
self.current_checker_command)
409
642
command = self.checker_command % self.host
410
643
except TypeError:
411
644
# Escape attributes for the shell
412
escaped_attrs = dict((key,
413
re.escape(unicode(str(val),
414
errors=
415
u'replace')))
416
for key, val in
417
vars(self).iteritems())
645
escaped_attrs = dict(
646
(attr,
647
re.escape(unicode(str(getattr(self, attr, "")),
648
errors=
649
'replace')))
650
for attr in
651
self.runtime_expansions)
652
418
653
try:
419
654
command = self.checker_command % escaped_attrs
420
except TypeError, error:
421
logger.error(u'Could not format string "%s":'
422
u' %s', self.checker_command, error)
655
except TypeError as error:
656
logger.error('Could not format string "%s":'
657
' %s', self.checker_command, error)
423
658
return True # Try again later
424
659
self.current_checker_command = command
425
660
try:
426
logger.info(u"Starting checker %r for %s",
661
logger.info("Starting checker %r for %s",
427
662
command, self.name)
428
663
# We don't need to redirect stdout and stderr, since
429
664
# in normal mode, that is already done by daemon(),
431
666
# always replaced by /dev/null.)
432
667
self.checker = subprocess.Popen(command,
433
668
close_fds=True,
434
shell=True, cwd=u"/")
669
shell=True, cwd="/")
435
670
self.checker_callback_tag = (gobject.child_watch_add
436
671
(self.checker.pid,
437
672
self.checker_callback,
442
677
if pid:
443
678
gobject.source_remove(self.checker_callback_tag)
444
679
self.checker_callback(pid, status, command)
445
except OSError, error:
446
logger.error(u"Failed to start subprocess: %s",
680
except OSError as error:
681
logger.error("Failed to start subprocess: %s",
447
682
error)
448
683
# Re-run this periodically if run by gobject.timeout_add
449
684
return True
453
688
if self.checker_callback_tag:
454
689
gobject.source_remove(self.checker_callback_tag)
455
690
self.checker_callback_tag = None
456
if getattr(self, u"checker", None) is None:
691
if getattr(self, "checker", None) is None:
457
692
return
458
logger.debug(u"Stopping checker for %(name)s", vars(self))
693
logger.debug("Stopping checker for %(name)s", vars(self))
459
694
try:
460
695
os.kill(self.checker.pid, signal.SIGTERM)
461
#os.sleep(0.5)
696
#time.sleep(0.5)
462
697
#if self.checker.poll() is None:
463
698
# os.kill(self.checker.pid, signal.SIGKILL)
464
except OSError, error:
699
except OSError as error:
465
700
if error.errno != errno.ESRCH: # No such process
466
701
raise
467
702
self.checker = None
468
469
def still_valid(self):
470
"""Has the timeout not yet passed for this client?"""
471
if not getattr(self, u"enabled", False):
472
return False
473
now = datetime.datetime.utcnow()
474
if self.last_checked_ok is None:
475
return now < (self.created + self.timeout)
476
else:
477
return now < (self.last_checked_ok + self.timeout)
478
479
480
class ClientDBus(Client, dbus.service.Object):
703
704
705
def dbus_service_property(dbus_interface, signature="v",
706
access="readwrite", byte_arrays=False):
707
"""Decorators for marking methods of a DBusObjectWithProperties to
708
become properties on the D-Bus.
709
710
The decorated method will be called with no arguments by "Get"
711
and with one argument by "Set".
712
713
The parameters, where they are supported, are the same as
714
dbus.service.method, except there is only "signature", since the
715
type from Get() and the type sent to Set() is the same.
716
"""
717
# Encoding deeply encoded byte arrays is not supported yet by the
718
# "Set" method, so we fail early here:
719
if byte_arrays and signature != "ay":
720
raise ValueError("Byte arrays not supported for non-'ay'"
721
" signature %r" % signature)
722
def decorator(func):
723
func._dbus_is_property = True
724
func._dbus_interface = dbus_interface
725
func._dbus_signature = signature
726
func._dbus_access = access
727
func._dbus_name = func.__name__
728
if func._dbus_name.endswith("_dbus_property"):
729
func._dbus_name = func._dbus_name[:-14]
730
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
731
return func
732
return decorator
733
734
735
class DBusPropertyException(dbus.exceptions.DBusException):
736
"""A base class for D-Bus property-related exceptions
737
"""
738
def __unicode__(self):
739
return unicode(str(self))
740
741
742
class DBusPropertyAccessException(DBusPropertyException):
743
"""A property's access permissions disallows an operation.
744
"""
745
pass
746
747
748
class DBusPropertyNotFound(DBusPropertyException):
749
"""An attempt was made to access a non-existing property.
750
"""
751
pass
752
753
754
class DBusObjectWithProperties(dbus.service.Object):
755
"""A D-Bus object with properties.
756
757
Classes inheriting from this can use the dbus_service_property
758
decorator to expose methods as D-Bus properties. It exposes the
759
standard Get(), Set(), and GetAll() methods on the D-Bus.
760
"""
761
762
@staticmethod
763
def _is_dbus_property(obj):
764
return getattr(obj, "_dbus_is_property", False)
765
766
def _get_all_dbus_properties(self):
767
"""Returns a generator of (name, attribute) pairs
768
"""
769
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
770
for cls in self.__class__.__mro__
771
for name, prop in
772
inspect.getmembers(cls, self._is_dbus_property))
773
774
def _get_dbus_property(self, interface_name, property_name):
775
"""Returns a bound method if one exists which is a D-Bus
776
property with the specified name and interface.
777
"""
778
for cls in self.__class__.__mro__:
779
for name, value in (inspect.getmembers
780
(cls, self._is_dbus_property)):
781
if (value._dbus_name == property_name
782
and value._dbus_interface == interface_name):
783
return value.__get__(self)
784
785
# No such property
786
raise DBusPropertyNotFound(self.dbus_object_path + ":"
787
+ interface_name + "."
788
+ property_name)
789
790
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
791
out_signature="v")
792
def Get(self, interface_name, property_name):
793
"""Standard D-Bus property Get() method, see D-Bus standard.
794
"""
795
prop = self._get_dbus_property(interface_name, property_name)
796
if prop._dbus_access == "write":
797
raise DBusPropertyAccessException(property_name)
798
value = prop()
799
if not hasattr(value, "variant_level"):
800
return value
801
return type(value)(value, variant_level=value.variant_level+1)
802
803
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
804
def Set(self, interface_name, property_name, value):
805
"""Standard D-Bus property Set() method, see D-Bus standard.
806
"""
807
prop = self._get_dbus_property(interface_name, property_name)
808
if prop._dbus_access == "read":
809
raise DBusPropertyAccessException(property_name)
810
if prop._dbus_get_args_options["byte_arrays"]:
811
# The byte_arrays option is not supported yet on
812
# signatures other than "ay".
813
if prop._dbus_signature != "ay":
814
raise ValueError
815
value = dbus.ByteArray(''.join(unichr(byte)
816
for byte in value))
817
prop(value)
818
819
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
820
out_signature="a{sv}")
821
def GetAll(self, interface_name):
822
"""Standard D-Bus property GetAll() method, see D-Bus
823
standard.
824
825
Note: Will not include properties with access="write".
826
"""
827
properties = {}
828
for name, prop in self._get_all_dbus_properties():
829
if (interface_name
830
and interface_name != prop._dbus_interface):
831
# Interface non-empty but did not match
832
continue
833
# Ignore write-only properties
834
if prop._dbus_access == "write":
835
continue
836
value = prop()
837
if not hasattr(value, "variant_level"):
838
properties[name] = value
839
continue
840
properties[name] = type(value)(value, variant_level=
841
value.variant_level+1)
842
return dbus.Dictionary(properties, signature="sv")
843
844
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
845
out_signature="s",
846
path_keyword='object_path',
847
connection_keyword='connection')
848
def Introspect(self, object_path, connection):
849
"""Standard D-Bus method, overloaded to insert property tags.
850
"""
851
xmlstring = dbus.service.Object.Introspect(self, object_path,
852
connection)
853
try:
854
document = xml.dom.minidom.parseString(xmlstring)
855
def make_tag(document, name, prop):
856
e = document.createElement("property")
857
e.setAttribute("name", name)
858
e.setAttribute("type", prop._dbus_signature)
859
e.setAttribute("access", prop._dbus_access)
860
return e
861
for if_tag in document.getElementsByTagName("interface"):
862
for tag in (make_tag(document, name, prop)
863
for name, prop
864
in self._get_all_dbus_properties()
865
if prop._dbus_interface
866
== if_tag.getAttribute("name")):
867
if_tag.appendChild(tag)
868
# Add the names to the return values for the
869
# "org.freedesktop.DBus.Properties" methods
870
if (if_tag.getAttribute("name")
871
== "org.freedesktop.DBus.Properties"):
872
for cn in if_tag.getElementsByTagName("method"):
873
if cn.getAttribute("name") == "Get":
874
for arg in cn.getElementsByTagName("arg"):
875
if (arg.getAttribute("direction")
876
== "out"):
877
arg.setAttribute("name", "value")
878
elif cn.getAttribute("name") == "GetAll":
879
for arg in cn.getElementsByTagName("arg"):
880
if (arg.getAttribute("direction")
881
== "out"):
882
arg.setAttribute("name", "props")
883
xmlstring = document.toxml("utf-8")
884
document.unlink()
885
except (AttributeError, xml.dom.DOMException,
886
xml.parsers.expat.ExpatError) as error:
887
logger.error("Failed to override Introspection method",
888
error)
889
return xmlstring
890
891
892
def datetime_to_dbus (dt, variant_level=0):
893
"""Convert a UTC datetime.datetime() to a D-Bus type."""
894
if dt is None:
895
return dbus.String("", variant_level = variant_level)
896
return dbus.String(dt.isoformat(),
897
variant_level=variant_level)
898
899
900
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
901
.__metaclass__):
902
"""Applied to an empty subclass of a D-Bus object, this metaclass
903
will add additional D-Bus attributes matching a certain pattern.
904
"""
905
def __new__(mcs, name, bases, attr):
906
# Go through all the base classes which could have D-Bus
907
# methods, signals, or properties in them
908
for base in (b for b in bases
909
if issubclass(b, dbus.service.Object)):
910
# Go though all attributes of the base class
911
for attrname, attribute in inspect.getmembers(base):
912
# Ignore non-D-Bus attributes, and D-Bus attributes
913
# with the wrong interface name
914
if (not hasattr(attribute, "_dbus_interface")
915
or not attribute._dbus_interface
916
.startswith("se.recompile.Mandos")):
917
continue
918
# Create an alternate D-Bus interface name based on
919
# the current name
920
alt_interface = (attribute._dbus_interface
921
.replace("se.recompile.Mandos",
922
"se.bsnet.fukt.Mandos"))
923
# Is this a D-Bus signal?
924
if getattr(attribute, "_dbus_is_signal", False):
925
# Extract the original non-method function by
926
# black magic
927
nonmethod_func = (dict(
928
zip(attribute.func_code.co_freevars,
929
attribute.__closure__))["func"]
930
.cell_contents)
931
# Create a new, but exactly alike, function
932
# object, and decorate it to be a new D-Bus signal
933
# with the alternate D-Bus interface name
934
new_function = (dbus.service.signal
935
(alt_interface,
936
attribute._dbus_signature)
937
(types.FunctionType(
938
nonmethod_func.func_code,
939
nonmethod_func.func_globals,
940
nonmethod_func.func_name,
941
nonmethod_func.func_defaults,
942
nonmethod_func.func_closure)))
943
# Define a creator of a function to call both the
944
# old and new functions, so both the old and new
945
# signals gets sent when the function is called
946
def fixscope(func1, func2):
947
"""This function is a scope container to pass
948
func1 and func2 to the "call_both" function
949
outside of its arguments"""
950
def call_both(*args, **kwargs):
951
"""This function will emit two D-Bus
952
signals by calling func1 and func2"""
953
func1(*args, **kwargs)
954
func2(*args, **kwargs)
955
return call_both
956
# Create the "call_both" function and add it to
957
# the class
958
attr[attrname] = fixscope(attribute,
959
new_function)
960
# Is this a D-Bus method?
961
elif getattr(attribute, "_dbus_is_method", False):
962
# Create a new, but exactly alike, function
963
# object. Decorate it to be a new D-Bus method
964
# with the alternate D-Bus interface name. Add it
965
# to the class.
966
attr[attrname] = (dbus.service.method
967
(alt_interface,
968
attribute._dbus_in_signature,
969
attribute._dbus_out_signature)
970
(types.FunctionType
971
(attribute.func_code,
972
attribute.func_globals,
973
attribute.func_name,
974
attribute.func_defaults,
975
attribute.func_closure)))
976
# Is this a D-Bus property?
977
elif getattr(attribute, "_dbus_is_property", False):
978
# Create a new, but exactly alike, function
979
# object, and decorate it to be a new D-Bus
980
# property with the alternate D-Bus interface
981
# name. Add it to the class.
982
attr[attrname] = (dbus_service_property
983
(alt_interface,
984
attribute._dbus_signature,
985
attribute._dbus_access,
986
attribute
987
._dbus_get_args_options
988
["byte_arrays"])
989
(types.FunctionType
990
(attribute.func_code,
991
attribute.func_globals,
992
attribute.func_name,
993
attribute.func_defaults,
994
attribute.func_closure)))
995
return type.__new__(mcs, name, bases, attr)
996
997
998
class ClientDBus(Client, DBusObjectWithProperties):
481
999
"""A Client class using D-Bus
482
1000
483
1001
Attributes:
484
1002
dbus_object_path: dbus.ObjectPath
485
1003
bus: dbus.SystemBus()
486
1004
"""
1005
1006
runtime_expansions = (Client.runtime_expansions
1007
+ ("dbus_object_path",))
1008
487
1009
# dbus.service.Object doesn't use super(), so we can't either.
488
1010
489
1011
def __init__(self, bus = None, *args, **kwargs):
490
1012
self.bus = bus
491
1013
Client.__init__(self, *args, **kwargs)
1014
1015
self._approvals_pending = 0
492
1016
# Only now, when this client is initialized, can it show up on
493
1017
# the D-Bus
1018
client_object_name = unicode(self.name).translate(
1019
{ord("."): ord("_"),
1020
ord("-"): ord("_")})
494
1021
self.dbus_object_path = (dbus.ObjectPath
495
(u"/clients/"
496
+ self.name.replace(u".", u"_")))
497
dbus.service.Object.__init__(self, self.bus,
498
self.dbus_object_path)
499
500
@staticmethod
501
def _datetime_to_dbus(dt, variant_level=0):
502
"""Convert a UTC datetime.datetime() to a D-Bus type."""
503
return dbus.String(dt.isoformat(),
504
variant_level=variant_level)
505
506
def enable(self):
507
oldstate = getattr(self, u"enabled", False)
508
r = Client.enable(self)
509
if oldstate != self.enabled:
510
# Emit D-Bus signals
511
self.PropertyChanged(dbus.String(u"enabled"),
512
dbus.Boolean(True, variant_level=1))
513
self.PropertyChanged(
514
dbus.String(u"last_enabled"),
515
self._datetime_to_dbus(self.last_enabled,
516
variant_level=1))
517
return r
518
519
def disable(self, signal = True):
520
oldstate = getattr(self, u"enabled", False)
521
r = Client.disable(self)
522
if signal and oldstate != self.enabled:
523
# Emit D-Bus signal
524
self.PropertyChanged(dbus.String(u"enabled"),
525
dbus.Boolean(False, variant_level=1))
526
return r
1022
("/clients/" + client_object_name))
1023
DBusObjectWithProperties.__init__(self, self.bus,
1024
self.dbus_object_path)
1025
1026
def notifychangeproperty(transform_func,
1027
dbus_name, type_func=lambda x: x,
1028
variant_level=1):
1029
""" Modify a variable so that it's a property which announces
1030
its changes to DBus.
1031
1032
transform_fun: Function that takes a value and a variant_level
1033
and transforms it to a D-Bus type.
1034
dbus_name: D-Bus name of the variable
1035
type_func: Function that transform the value before sending it
1036
to the D-Bus. Default: no transform
1037
variant_level: D-Bus variant level. Default: 1
1038
"""
1039
attrname = "_{0}".format(dbus_name)
1040
def setter(self, value):
1041
if hasattr(self, "dbus_object_path"):
1042
if (not hasattr(self, attrname) or
1043
type_func(getattr(self, attrname, None))
1044
!= type_func(value)):
1045
dbus_value = transform_func(type_func(value),
1046
variant_level
1047
=variant_level)
1048
self.PropertyChanged(dbus.String(dbus_name),
1049
dbus_value)
1050
setattr(self, attrname, value)
1051
1052
return property(lambda self: getattr(self, attrname), setter)
1053
1054
1055
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1056
approvals_pending = notifychangeproperty(dbus.Boolean,
1057
"ApprovalPending",
1058
type_func = bool)
1059
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1060
last_enabled = notifychangeproperty(datetime_to_dbus,
1061
"LastEnabled")
1062
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1063
type_func = lambda checker:
1064
checker is not None)
1065
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1066
"LastCheckedOK")
1067
last_approval_request = notifychangeproperty(
1068
datetime_to_dbus, "LastApprovalRequest")
1069
approved_by_default = notifychangeproperty(dbus.Boolean,
1070
"ApprovedByDefault")
1071
approval_delay = notifychangeproperty(dbus.UInt16,
1072
"ApprovalDelay",
1073
type_func =
1074
timedelta_to_milliseconds)
1075
approval_duration = notifychangeproperty(
1076
dbus.UInt16, "ApprovalDuration",
1077
type_func = timedelta_to_milliseconds)
1078
host = notifychangeproperty(dbus.String, "Host")
1079
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1080
type_func =
1081
timedelta_to_milliseconds)
1082
extended_timeout = notifychangeproperty(
1083
dbus.UInt16, "ExtendedTimeout",
1084
type_func = timedelta_to_milliseconds)
1085
interval = notifychangeproperty(dbus.UInt16,
1086
"Interval",
1087
type_func =
1088
timedelta_to_milliseconds)
1089
checker_command = notifychangeproperty(dbus.String, "Checker")
1090
1091
del notifychangeproperty
527
1092
528
1093
def __del__(self, *args, **kwargs):
529
1094
try:
530
1095
self.remove_from_connection()
531
1096
except LookupError:
532
1097
pass
533
if hasattr(dbus.service.Object, u"__del__"):
534
dbus.service.Object.__del__(self, *args, **kwargs)
1098
if hasattr(DBusObjectWithProperties, "__del__"):
1099
DBusObjectWithProperties.__del__(self, *args, **kwargs)
535
1100
Client.__del__(self, *args, **kwargs)
536
1101
537
1102
def checker_callback(self, pid, condition, command,
538
1103
*args, **kwargs):
539
1104
self.checker_callback_tag = None
540
1105
self.checker = None
541
# Emit D-Bus signal
542
self.PropertyChanged(dbus.String(u"checker_running"),
543
dbus.Boolean(False, variant_level=1))
544
1106
if os.WIFEXITED(condition):
545
1107
exitstatus = os.WEXITSTATUS(condition)
546
1108
# Emit D-Bus signal
556
1118
return Client.checker_callback(self, pid, condition, command,
557
1119
*args, **kwargs)
558
1120
559
def checked_ok(self, *args, **kwargs):
560
r = Client.checked_ok(self, *args, **kwargs)
561
# Emit D-Bus signal
562
self.PropertyChanged(
563
dbus.String(u"last_checked_ok"),
564
(self._datetime_to_dbus(self.last_checked_ok,
565
variant_level=1)))
566
return r
567
568
1121
def start_checker(self, *args, **kwargs):
569
1122
old_checker = self.checker
570
1123
if self.checker is not None:
577
1130
and old_checker_pid != self.checker.pid):
578
1131
# Emit D-Bus signal
579
1132
self.CheckerStarted(self.current_checker_command)
580
self.PropertyChanged(
581
dbus.String(u"checker_running"),
582
dbus.Boolean(True, variant_level=1))
583
return r
584
585
def stop_checker(self, *args, **kwargs):
586
old_checker = getattr(self, u"checker", None)
587
r = Client.stop_checker(self, *args, **kwargs)
588
if (old_checker is not None
589
and getattr(self, u"checker", None) is None):
590
self.PropertyChanged(dbus.String(u"checker_running"),
591
dbus.Boolean(False, variant_level=1))
592
return r
593
594
## D-Bus methods & signals
595
_interface = u"se.bsnet.fukt.Mandos.Client"
596
597
# CheckedOK - method
598
@dbus.service.method(_interface)
599
def CheckedOK(self):
600
return self.checked_ok()
1133
return r
1134
1135
def _reset_approved(self):
1136
self.approved = None
1137
return False
1138
1139
def approve(self, value=True):
1140
self.send_changedstate()
1141
self.approved = value
1142
gobject.timeout_add(timedelta_to_milliseconds
1143
(self.approval_duration),
1144
self._reset_approved)
1145
1146
1147
## D-Bus methods, signals & properties
1148
_interface = "se.recompile.Mandos.Client"
1149
1150
## Signals
601
1151
602
1152
# CheckerCompleted - signal
603
@dbus.service.signal(_interface, signature=u"nxs")
1153
@dbus.service.signal(_interface, signature="nxs")
604
1154
def CheckerCompleted(self, exitcode, waitstatus, command):
605
1155
"D-Bus signal"
606
1156
pass
607
1157
608
1158
# CheckerStarted - signal
609
@dbus.service.signal(_interface, signature=u"s")
1159
@dbus.service.signal(_interface, signature="s")
610
1160
def CheckerStarted(self, command):
611
1161
"D-Bus signal"
612
1162
pass
613
1163
614
# GetAllProperties - method
615
@dbus.service.method(_interface, out_signature=u"a{sv}")
616
def GetAllProperties(self):
617
"D-Bus method"
618
return dbus.Dictionary({
619
dbus.String(u"name"):
620
dbus.String(self.name, variant_level=1),
621
dbus.String(u"fingerprint"):
622
dbus.String(self.fingerprint, variant_level=1),
623
dbus.String(u"host"):
624
dbus.String(self.host, variant_level=1),
625
dbus.String(u"created"):
626
self._datetime_to_dbus(self.created,
627
variant_level=1),
628
dbus.String(u"last_enabled"):
629
(self._datetime_to_dbus(self.last_enabled,
630
variant_level=1)
631
if self.last_enabled is not None
632
else dbus.Boolean(False, variant_level=1)),
633
dbus.String(u"enabled"):
634
dbus.Boolean(self.enabled, variant_level=1),
635
dbus.String(u"last_checked_ok"):
636
(self._datetime_to_dbus(self.last_checked_ok,
637
variant_level=1)
638
if self.last_checked_ok is not None
639
else dbus.Boolean (False, variant_level=1)),
640
dbus.String(u"timeout"):
641
dbus.UInt64(self.timeout_milliseconds(),
642
variant_level=1),
643
dbus.String(u"interval"):
644
dbus.UInt64(self.interval_milliseconds(),
645
variant_level=1),
646
dbus.String(u"checker"):
647
dbus.String(self.checker_command,
648
variant_level=1),
649
dbus.String(u"checker_running"):
650
dbus.Boolean(self.checker is not None,
651
variant_level=1),
652
dbus.String(u"object_path"):
653
dbus.ObjectPath(self.dbus_object_path,
654
variant_level=1)
655
}, signature=u"sv")
656
657
# IsStillValid - method
658
@dbus.service.method(_interface, out_signature=u"b")
659
def IsStillValid(self):
660
return self.still_valid()
661
662
1164
# PropertyChanged - signal
663
@dbus.service.signal(_interface, signature=u"sv")
1165
@dbus.service.signal(_interface, signature="sv")
664
1166
def PropertyChanged(self, property, value):
665
1167
"D-Bus signal"
666
1168
pass
667
1169
668
# ReceivedSecret - signal
1170
# GotSecret - signal
669
1171
@dbus.service.signal(_interface)
670
def ReceivedSecret(self):
671
"D-Bus signal"
1172
def GotSecret(self):
1173
"""D-Bus signal
1174
Is sent after a successful transfer of secret from the Mandos
1175
server to mandos-client
1176
"""
672
1177
pass
673
1178
674
1179
# Rejected - signal
675
@dbus.service.signal(_interface)
676
def Rejected(self):
677
"D-Bus signal"
678
pass
679
680
# SetChecker - method
681
@dbus.service.method(_interface, in_signature=u"s")
682
def SetChecker(self, checker):
683
"D-Bus setter method"
684
self.checker_command = checker
685
# Emit D-Bus signal
686
self.PropertyChanged(dbus.String(u"checker"),
687
dbus.String(self.checker_command,
688
variant_level=1))
689
690
# SetHost - method
691
@dbus.service.method(_interface, in_signature=u"s")
692
def SetHost(self, host):
693
"D-Bus setter method"
694
self.host = host
695
# Emit D-Bus signal
696
self.PropertyChanged(dbus.String(u"host"),
697
dbus.String(self.host, variant_level=1))
698
699
# SetInterval - method
700
@dbus.service.method(_interface, in_signature=u"t")
701
def SetInterval(self, milliseconds):
702
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
703
# Emit D-Bus signal
704
self.PropertyChanged(dbus.String(u"interval"),
705
(dbus.UInt64(self.interval_milliseconds(),
706
variant_level=1)))
707
708
# SetSecret - method
709
@dbus.service.method(_interface, in_signature=u"ay",
710
byte_arrays=True)
711
def SetSecret(self, secret):
712
"D-Bus setter method"
713
self.secret = str(secret)
714
715
# SetTimeout - method
716
@dbus.service.method(_interface, in_signature=u"t")
717
def SetTimeout(self, milliseconds):
718
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
719
# Emit D-Bus signal
720
self.PropertyChanged(dbus.String(u"timeout"),
721
(dbus.UInt64(self.timeout_milliseconds(),
722
variant_level=1)))
1180
@dbus.service.signal(_interface, signature="s")
1181
def Rejected(self, reason):
1182
"D-Bus signal"
1183
pass
1184
1185
# NeedApproval - signal
1186
@dbus.service.signal(_interface, signature="tb")
1187
def NeedApproval(self, timeout, default):
1188
"D-Bus signal"
1189
return self.need_approval()
1190
1191
# NeRwequest - signal
1192
@dbus.service.signal(_interface, signature="s")
1193
def NewRequest(self, ip):
1194
"""D-Bus signal
1195
Is sent after a client request a password.
1196
"""
1197
pass
1198
1199
## Methods
1200
1201
# Approve - method
1202
@dbus.service.method(_interface, in_signature="b")
1203
def Approve(self, value):
1204
self.approve(value)
1205
1206
# CheckedOK - method
1207
@dbus.service.method(_interface)
1208
def CheckedOK(self):
1209
self.checked_ok()
723
1210
724
1211
# Enable - method
725
1212
@dbus.service.method(_interface)
744
1231
def StopChecker(self):
745
1232
self.stop_checker()
746
1233
1234
## Properties
1235
1236
# ApprovalPending - property
1237
@dbus_service_property(_interface, signature="b", access="read")
1238
def ApprovalPending_dbus_property(self):
1239
return dbus.Boolean(bool(self.approvals_pending))
1240
1241
# ApprovedByDefault - property
1242
@dbus_service_property(_interface, signature="b",
1243
access="readwrite")
1244
def ApprovedByDefault_dbus_property(self, value=None):
1245
if value is None: # get
1246
return dbus.Boolean(self.approved_by_default)
1247
self.approved_by_default = bool(value)
1248
1249
# ApprovalDelay - property
1250
@dbus_service_property(_interface, signature="t",
1251
access="readwrite")
1252
def ApprovalDelay_dbus_property(self, value=None):
1253
if value is None: # get
1254
return dbus.UInt64(self.approval_delay_milliseconds())
1255
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1256
1257
# ApprovalDuration - property
1258
@dbus_service_property(_interface, signature="t",
1259
access="readwrite")
1260
def ApprovalDuration_dbus_property(self, value=None):
1261
if value is None: # get
1262
return dbus.UInt64(timedelta_to_milliseconds(
1263
self.approval_duration))
1264
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1265
1266
# Name - property
1267
@dbus_service_property(_interface, signature="s", access="read")
1268
def Name_dbus_property(self):
1269
return dbus.String(self.name)
1270
1271
# Fingerprint - property
1272
@dbus_service_property(_interface, signature="s", access="read")
1273
def Fingerprint_dbus_property(self):
1274
return dbus.String(self.fingerprint)
1275
1276
# Host - property
1277
@dbus_service_property(_interface, signature="s",
1278
access="readwrite")
1279
def Host_dbus_property(self, value=None):
1280
if value is None: # get
1281
return dbus.String(self.host)
1282
self.host = value
1283
1284
# Created - property
1285
@dbus_service_property(_interface, signature="s", access="read")
1286
def Created_dbus_property(self):
1287
return datetime_to_dbus(self.created)
1288
1289
# LastEnabled - property
1290
@dbus_service_property(_interface, signature="s", access="read")
1291
def LastEnabled_dbus_property(self):
1292
return datetime_to_dbus(self.last_enabled)
1293
1294
# Enabled - property
1295
@dbus_service_property(_interface, signature="b",
1296
access="readwrite")
1297
def Enabled_dbus_property(self, value=None):
1298
if value is None: # get
1299
return dbus.Boolean(self.enabled)
1300
if value:
1301
self.enable()
1302
else:
1303
self.disable()
1304
1305
# LastCheckedOK - property
1306
@dbus_service_property(_interface, signature="s",
1307
access="readwrite")
1308
def LastCheckedOK_dbus_property(self, value=None):
1309
if value is not None:
1310
self.checked_ok()
1311
return
1312
return datetime_to_dbus(self.last_checked_ok)
1313
1314
# Expires - property
1315
@dbus_service_property(_interface, signature="s", access="read")
1316
def Expires_dbus_property(self):
1317
return datetime_to_dbus(self.expires)
1318
1319
# LastApprovalRequest - property
1320
@dbus_service_property(_interface, signature="s", access="read")
1321
def LastApprovalRequest_dbus_property(self):
1322
return datetime_to_dbus(self.last_approval_request)
1323
1324
# Timeout - property
1325
@dbus_service_property(_interface, signature="t",
1326
access="readwrite")
1327
def Timeout_dbus_property(self, value=None):
1328
if value is None: # get
1329
return dbus.UInt64(self.timeout_milliseconds())
1330
self.timeout = datetime.timedelta(0, 0, 0, value)
1331
if getattr(self, "disable_initiator_tag", None) is None:
1332
return
1333
# Reschedule timeout
1334
gobject.source_remove(self.disable_initiator_tag)
1335
self.disable_initiator_tag = None
1336
self.expires = None
1337
time_to_die = timedelta_to_milliseconds((self
1338
.last_checked_ok
1339
+ self.timeout)
1340
- datetime.datetime
1341
.utcnow())
1342
if time_to_die <= 0:
1343
# The timeout has passed
1344
self.disable()
1345
else:
1346
self.expires = (datetime.datetime.utcnow()
1347
+ datetime.timedelta(milliseconds =
1348
time_to_die))
1349
self.disable_initiator_tag = (gobject.timeout_add
1350
(time_to_die, self.disable))
1351
1352
# ExtendedTimeout - property
1353
@dbus_service_property(_interface, signature="t",
1354
access="readwrite")
1355
def ExtendedTimeout_dbus_property(self, value=None):
1356
if value is None: # get
1357
return dbus.UInt64(self.extended_timeout_milliseconds())
1358
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1359
1360
# Interval - property
1361
@dbus_service_property(_interface, signature="t",
1362
access="readwrite")
1363
def Interval_dbus_property(self, value=None):
1364
if value is None: # get
1365
return dbus.UInt64(self.interval_milliseconds())
1366
self.interval = datetime.timedelta(0, 0, 0, value)
1367
if getattr(self, "checker_initiator_tag", None) is None:
1368
return
1369
if self.enabled:
1370
# Reschedule checker run
1371
gobject.source_remove(self.checker_initiator_tag)
1372
self.checker_initiator_tag = (gobject.timeout_add
1373
(value, self.start_checker))
1374
self.start_checker() # Start one now, too
1375
1376
# Checker - property
1377
@dbus_service_property(_interface, signature="s",
1378
access="readwrite")
1379
def Checker_dbus_property(self, value=None):
1380
if value is None: # get
1381
return dbus.String(self.checker_command)
1382
self.checker_command = value
1383
1384
# CheckerRunning - property
1385
@dbus_service_property(_interface, signature="b",
1386
access="readwrite")
1387
def CheckerRunning_dbus_property(self, value=None):
1388
if value is None: # get
1389
return dbus.Boolean(self.checker is not None)
1390
if value:
1391
self.start_checker()
1392
else:
1393
self.stop_checker()
1394
1395
# ObjectPath - property
1396
@dbus_service_property(_interface, signature="o", access="read")
1397
def ObjectPath_dbus_property(self):
1398
return self.dbus_object_path # is already a dbus.ObjectPath
1399
1400
# Secret = property
1401
@dbus_service_property(_interface, signature="ay",
1402
access="write", byte_arrays=True)
1403
def Secret_dbus_property(self, value):
1404
self.secret = str(value)
1405
747
1406
del _interface
748
1407
749
1408
1409
class ProxyClient(object):
1410
def __init__(self, child_pipe, fpr, address):
1411
self._pipe = child_pipe
1412
self._pipe.send(('init', fpr, address))
1413
if not self._pipe.recv():
1414
raise KeyError()
1415
1416
def __getattribute__(self, name):
1417
if name == '_pipe':
1418
return super(ProxyClient, self).__getattribute__(name)
1419
self._pipe.send(('getattr', name))
1420
data = self._pipe.recv()
1421
if data[0] == 'data':
1422
return data[1]
1423
if data[0] == 'function':
1424
def func(*args, **kwargs):
1425
self._pipe.send(('funcall', name, args, kwargs))
1426
return self._pipe.recv()[1]
1427
return func
1428
1429
def __setattr__(self, name, value):
1430
if name == '_pipe':
1431
return super(ProxyClient, self).__setattr__(name, value)
1432
self._pipe.send(('setattr', name, value))
1433
1434
1435
class ClientDBusTransitional(ClientDBus):
1436
__metaclass__ = AlternateDBusNamesMetaclass
1437
1438
750
1439
class ClientHandler(socketserver.BaseRequestHandler, object):
751
1440
"""A class to handle client connections.
752
1441
754
1443
Note: This will run in its own forked process."""
755
1444
756
1445
def handle(self):
757
logger.info(u"TCP connection from: %s",
758
unicode(self.client_address))
759
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
760
# Open IPC pipe to parent process
761
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1446
with contextlib.closing(self.server.child_pipe) as child_pipe:
1447
logger.info("TCP connection from: %s",
1448
unicode(self.client_address))
1449
logger.debug("Pipe FD: %d",
1450
self.server.child_pipe.fileno())
1451
762
1452
session = (gnutls.connection
763
1453
.ClientSession(self.request,
764
1454
gnutls.connection
765
1455
.X509Credentials()))
766
1456
767
line = self.request.makefile().readline()
768
logger.debug(u"Protocol version: %r", line)
769
try:
770
if int(line.strip().split()[0]) > 1:
771
raise RuntimeError
772
except (ValueError, IndexError, RuntimeError), error:
773
logger.error(u"Unknown protocol version: %s", error)
774
return
775
776
1457
# Note: gnutls.connection.X509Credentials is really a
777
1458
# generic GnuTLS certificate credentials object so long as
778
1459
# no X.509 keys are added to it. Therefore, we can use it
779
1460
# here despite using OpenPGP certificates.
780
1461
781
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
782
# u"+AES-256-CBC", u"+SHA1",
783
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
784
# u"+DHE-DSS"))
1462
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1463
# "+AES-256-CBC", "+SHA1",
1464
# "+COMP-NULL", "+CTYPE-OPENPGP",
1465
# "+DHE-DSS"))
785
1466
# Use a fallback default, since this MUST be set.
786
1467
priority = self.server.gnutls_priority
787
1468
if priority is None:
788
priority = u"NORMAL"
1469
priority = "NORMAL"
789
1470
(gnutls.library.functions
790
1471
.gnutls_priority_set_direct(session._c_object,
791
1472
priority, None))
792
1473
1474
# Start communication using the Mandos protocol
1475
# Get protocol number
1476
line = self.request.makefile().readline()
1477
logger.debug("Protocol version: %r", line)
1478
try:
1479
if int(line.strip().split()[0]) > 1:
1480
raise RuntimeError
1481
except (ValueError, IndexError, RuntimeError) as error:
1482
logger.error("Unknown protocol version: %s", error)
1483
return
1484
1485
# Start GnuTLS connection
793
1486
try:
794
1487
session.handshake()
795
except gnutls.errors.GNUTLSError, error:
796
logger.warning(u"Handshake failed: %s", error)
1488
except gnutls.errors.GNUTLSError as error:
1489
logger.warning("Handshake failed: %s", error)
797
1490
# Do not run session.bye() here: the session is not
798
1491
# established. Just abandon the request.
799
1492
return
800
logger.debug(u"Handshake succeeded")
1493
logger.debug("Handshake succeeded")
1494
1495
approval_required = False
801
1496
try:
802
fpr = self.fingerprint(self.peer_certificate(session))
803
except (TypeError, gnutls.errors.GNUTLSError), error:
804
logger.warning(u"Bad certificate: %s", error)
805
session.bye()
806
return
807
logger.debug(u"Fingerprint: %s", fpr)
1497
try:
1498
fpr = self.fingerprint(self.peer_certificate
1499
(session))
1500
except (TypeError,
1501
gnutls.errors.GNUTLSError) as error:
1502
logger.warning("Bad certificate: %s", error)
1503
return
1504
logger.debug("Fingerprint: %s", fpr)
1505
1506
try:
1507
client = ProxyClient(child_pipe, fpr,
1508
self.client_address)
1509
except KeyError:
1510
return
1511
1512
if self.server.use_dbus:
1513
# Emit D-Bus signal
1514
client.NewRequest(str(self.client_address))
1515
1516
if client.approval_delay:
1517
delay = client.approval_delay
1518
client.approvals_pending += 1
1519
approval_required = True
1520
1521
while True:
1522
if not client.enabled:
1523
logger.info("Client %s is disabled",
1524
client.name)
1525
if self.server.use_dbus:
1526
# Emit D-Bus signal
1527
client.Rejected("Disabled")
1528
return
1529
1530
if client.approved or not client.approval_delay:
1531
#We are approved or approval is disabled
1532
break
1533
elif client.approved is None:
1534
logger.info("Client %s needs approval",
1535
client.name)
1536
if self.server.use_dbus:
1537
# Emit D-Bus signal
1538
client.NeedApproval(
1539
client.approval_delay_milliseconds(),
1540
client.approved_by_default)
1541
else:
1542
logger.warning("Client %s was not approved",
1543
client.name)
1544
if self.server.use_dbus:
1545
# Emit D-Bus signal
1546
client.Rejected("Denied")
1547
return
1548
1549
#wait until timeout or approved
1550
time = datetime.datetime.now()
1551
client.changedstate.acquire()
1552
(client.changedstate.wait
1553
(float(client.timedelta_to_milliseconds(delay)
1554
/ 1000)))
1555
client.changedstate.release()
1556
time2 = datetime.datetime.now()
1557
if (time2 - time) >= delay:
1558
if not client.approved_by_default:
1559
logger.warning("Client %s timed out while"
1560
" waiting for approval",
1561
client.name)
1562
if self.server.use_dbus:
1563
# Emit D-Bus signal
1564
client.Rejected("Approval timed out")
1565
return
1566
else:
1567
break
1568
else:
1569
delay -= time2 - time
1570
1571
sent_size = 0
1572
while sent_size < len(client.secret):
1573
try:
1574
sent = session.send(client.secret[sent_size:])
1575
except gnutls.errors.GNUTLSError as error:
1576
logger.warning("gnutls send failed")
1577
return
1578
logger.debug("Sent: %d, remaining: %d",
1579
sent, len(client.secret)
1580
- (sent_size + sent))
1581
sent_size += sent
1582
1583
logger.info("Sending secret to %s", client.name)
1584
# bump the timeout using extended_timeout
1585
client.checked_ok(client.extended_timeout)
1586
if self.server.use_dbus:
1587
# Emit D-Bus signal
1588
client.GotSecret()
808
1589
809
for c in self.server.clients:
810
if c.fingerprint == fpr:
811
client = c
812
break
813
else:
814
ipc.write(u"NOTFOUND %s %s\n"
815
% (fpr, unicode(self.client_address)))
816
session.bye()
817
return
818
# Have to check if client.still_valid(), since it is
819
# possible that the client timed out while establishing
820
# the GnuTLS session.
821
if not client.still_valid():
822
ipc.write(u"INVALID %s\n" % client.name)
823
session.bye()
824
return
825
ipc.write(u"SENDING %s\n" % client.name)
826
sent_size = 0
827
while sent_size < len(client.secret):
828
sent = session.send(client.secret[sent_size:])
829
logger.debug(u"Sent: %d, remaining: %d",
830
sent, len(client.secret)
831
- (sent_size + sent))
832
sent_size += sent
833
session.bye()
1590
finally:
1591
if approval_required:
1592
client.approvals_pending -= 1
1593
try:
1594
session.bye()
1595
except gnutls.errors.GNUTLSError as error:
1596
logger.warning("GnuTLS bye failed")
834
1597
835
1598
@staticmethod
836
1599
def peer_certificate(session):
846
1609
.gnutls_certificate_get_peers
847
1610
(session._c_object, ctypes.byref(list_size)))
848
1611
if not bool(cert_list) and list_size.value != 0:
849
raise gnutls.errors.GNUTLSError(u"error getting peer"
850
u" certificate")
1612
raise gnutls.errors.GNUTLSError("error getting peer"
1613
" certificate")
851
1614
if list_size.value == 0:
852
1615
return None
853
1616
cert = cert_list[0]
879
1642
if crtverify.value != 0:
880
1643
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
881
1644
raise (gnutls.errors.CertificateSecurityError
882
(u"Verify failed"))
1645
("Verify failed"))
883
1646
# New buffer for the fingerprint
884
1647
buf = ctypes.create_string_buffer(20)
885
1648
buf_len = ctypes.c_size_t()
892
1655
# Convert the buffer to a Python bytestring
893
1656
fpr = ctypes.string_at(buf, buf_len.value)
894
1657
# Convert the bytestring to hexadecimal notation
895
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1658
hex_fpr = binascii.hexlify(fpr).upper()
896
1659
return hex_fpr
897
1660
898
1661
899
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
900
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1662
class MultiprocessingMixIn(object):
1663
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1664
def sub_process_main(self, request, address):
1665
try:
1666
self.finish_request(request, address)
1667
except:
1668
self.handle_error(request, address)
1669
self.close_request(request)
1670
1671
def process_request(self, request, address):
1672
"""Start a new process to process the request."""
1673
proc = multiprocessing.Process(target = self.sub_process_main,
1674
args = (request,
1675
address))
1676
proc.start()
1677
return proc
1678
1679
1680
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1681
""" adds a pipe to the MixIn """
901
1682
def process_request(self, request, client_address):
902
1683
"""Overrides and wraps the original process_request().
903
1684
904
1685
This function creates a new pipe in self.pipe
905
1686
"""
906
self.pipe = os.pipe()
907
super(ForkingMixInWithPipe,
908
self).process_request(request, client_address)
909
os.close(self.pipe[1]) # close write end
910
self.add_pipe(self.pipe[0])
911
def add_pipe(self, pipe):
1687
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1688
1689
proc = MultiprocessingMixIn.process_request(self, request,
1690
client_address)
1691
self.child_pipe.close()
1692
self.add_pipe(parent_pipe, proc)
1693
1694
def add_pipe(self, parent_pipe, proc):
912
1695
"""Dummy function; override as necessary"""
913
os.close(pipe)
914
915
916
class IPv6_TCPServer(ForkingMixInWithPipe,
1696
raise NotImplementedError
1697
1698
1699
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
917
1700
socketserver.TCPServer, object):
918
1701
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
919
1702
935
1718
bind to an address or port if they were not specified."""
936
1719
if self.interface is not None:
937
1720
if SO_BINDTODEVICE is None:
938
logger.error(u"SO_BINDTODEVICE does not exist;"
939
u" cannot bind to interface %s",
1721
logger.error("SO_BINDTODEVICE does not exist;"
1722
" cannot bind to interface %s",
940
1723
self.interface)
941
1724
else:
942
1725
try:
943
1726
self.socket.setsockopt(socket.SOL_SOCKET,
944
1727
SO_BINDTODEVICE,
945
1728
str(self.interface
946
+ u'\0'))
947
except socket.error, error:
1729
+ '\0'))
1730
except socket.error as error:
948
1731
if error[0] == errno.EPERM:
949
logger.error(u"No permission to"
950
u" bind to interface %s",
1732
logger.error("No permission to"
1733
" bind to interface %s",
951
1734
self.interface)
952
1735
elif error[0] == errno.ENOPROTOOPT:
953
logger.error(u"SO_BINDTODEVICE not available;"
954
u" cannot bind to interface %s",
1736
logger.error("SO_BINDTODEVICE not available;"
1737
" cannot bind to interface %s",
955
1738
self.interface)
956
1739
else:
957
1740
raise
959
1742
if self.server_address[0] or self.server_address[1]:
960
1743
if not self.server_address[0]:
961
1744
if self.address_family == socket.AF_INET6:
962
any_address = u"::" # in6addr_any
1745
any_address = "::" # in6addr_any
963
1746
else:
964
1747
any_address = socket.INADDR_ANY
965
1748
self.server_address = (any_address,
983
1766
clients: set of Client objects
984
1767
gnutls_priority GnuTLS priority string
985
1768
use_dbus: Boolean; to emit D-Bus signals or not
986
clients: set of Client objects
987
gnutls_priority GnuTLS priority string
988
use_dbus: Boolean; to emit D-Bus signals or not
989
1769
990
1770
Assumes a gobject.MainLoop event loop.
991
1771
"""
995
1775
self.enabled = False
996
1776
self.clients = clients
997
1777
if self.clients is None:
998
self.clients = set()
1778
self.clients = {}
999
1779
self.use_dbus = use_dbus
1000
1780
self.gnutls_priority = gnutls_priority
1001
1781
IPv6_TCPServer.__init__(self, server_address,
1005
1785
def server_activate(self):
1006
1786
if self.enabled:
1007
1787
return socketserver.TCPServer.server_activate(self)
1788
1008
1789
def enable(self):
1009
1790
self.enabled = True
1010
def add_pipe(self, pipe):
1791
1792
def add_pipe(self, parent_pipe, proc):
1011
1793
# Call "handle_ipc" for both data and EOF events
1012
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1013
self.handle_ipc)
1014
def handle_ipc(self, source, condition, file_objects={}):
1794
gobject.io_add_watch(parent_pipe.fileno(),
1795
gobject.IO_IN | gobject.IO_HUP,
1796
functools.partial(self.handle_ipc,
1797
parent_pipe =
1798
parent_pipe,
1799
proc = proc))
1800
1801
def handle_ipc(self, source, condition, parent_pipe=None,
1802
proc = None, client_object=None):
1015
1803
condition_names = {
1016
gobject.IO_IN: u"IN", # There is data to read.
1017
gobject.IO_OUT: u"OUT", # Data can be written (without
1804
gobject.IO_IN: "IN", # There is data to read.
1805
gobject.IO_OUT: "OUT", # Data can be written (without
1018
1806
# blocking).
1019
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1020
gobject.IO_ERR: u"ERR", # Error condition.
1021
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1807
gobject.IO_PRI: "PRI", # There is urgent data to read.
1808
gobject.IO_ERR: "ERR", # Error condition.
1809
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1022
1810
# broken, usually for pipes and
1023
1811
# sockets).
1024
1812
}
1026
1814
for cond, name in
1027
1815
condition_names.iteritems()
1028
1816
if cond & condition)
1029
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1030
conditions_string)
1031
1032
# Turn the pipe file descriptor into a Python file object
1033
if source not in file_objects:
1034
file_objects[source] = os.fdopen(source, u"r", 1)
1035
1036
# Read a line from the file object
1037
cmdline = file_objects[source].readline()
1038
if not cmdline: # Empty line means end of file
1039
# close the IPC pipe
1040
file_objects[source].close()
1041
del file_objects[source]
1042
1043
# Stop calling this function
1044
return False
1045
1046
logger.debug(u"IPC command: %r", cmdline)
1047
1048
# Parse and act on command
1049
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1050
1051
if cmd == u"NOTFOUND":
1052
logger.warning(u"Client not found for fingerprint: %s",
1053
args)
1054
if self.use_dbus:
1055
# Emit D-Bus signal
1056
mandos_dbus_service.ClientNotFound(args)
1057
elif cmd == u"INVALID":
1058
for client in self.clients:
1059
if client.name == args:
1060
logger.warning(u"Client %s is invalid", args)
1061
if self.use_dbus:
1062
# Emit D-Bus signal
1063
client.Rejected()
1064
break
1065
else:
1066
logger.error(u"Unknown client %s is invalid", args)
1067
elif cmd == u"SENDING":
1068
for client in self.clients:
1069
if client.name == args:
1070
logger.info(u"Sending secret to %s", client.name)
1071
client.checked_ok()
1072
if self.use_dbus:
1073
# Emit D-Bus signal
1074
client.ReceivedSecret()
1075
break
1076
else:
1077
logger.error(u"Sending secret to unknown client %s",
1078
args)
1079
else:
1080
logger.error(u"Unknown IPC command: %r", cmdline)
1081
1082
# Keep calling this function
1817
# error, or the other end of multiprocessing.Pipe has closed
1818
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1819
# Wait for other process to exit
1820
proc.join()
1821
return False
1822
1823
# Read a request from the child
1824
request = parent_pipe.recv()
1825
command = request[0]
1826
1827
if command == 'init':
1828
fpr = request[1]
1829
address = request[2]
1830
1831
for c in self.clients.itervalues():
1832
if c.fingerprint == fpr:
1833
client = c
1834
break
1835
else:
1836
logger.info("Client not found for fingerprint: %s, ad"
1837
"dress: %s", fpr, address)
1838
if self.use_dbus:
1839
# Emit D-Bus signal
1840
mandos_dbus_service.ClientNotFound(fpr,
1841
address[0])
1842
parent_pipe.send(False)
1843
return False
1844
1845
gobject.io_add_watch(parent_pipe.fileno(),
1846
gobject.IO_IN | gobject.IO_HUP,
1847
functools.partial(self.handle_ipc,
1848
parent_pipe =
1849
parent_pipe,
1850
proc = proc,
1851
client_object =
1852
client))
1853
parent_pipe.send(True)
1854
# remove the old hook in favor of the new above hook on
1855
# same fileno
1856
return False
1857
if command == 'funcall':
1858
funcname = request[1]
1859
args = request[2]
1860
kwargs = request[3]
1861
1862
parent_pipe.send(('data', getattr(client_object,
1863
funcname)(*args,
1864
**kwargs)))
1865
1866
if command == 'getattr':
1867
attrname = request[1]
1868
if callable(client_object.__getattribute__(attrname)):
1869
parent_pipe.send(('function',))
1870
else:
1871
parent_pipe.send(('data', client_object
1872
.__getattribute__(attrname)))
1873
1874
if command == 'setattr':
1875
attrname = request[1]
1876
value = request[2]
1877
setattr(client_object, attrname, value)
1878
1083
1879
return True
1084
1880
1085
1881
1086
1882
def string_to_delta(interval):
1087
1883
"""Parse a string and return a datetime.timedelta
1088
1884
1089
>>> string_to_delta(u'7d')
1885
>>> string_to_delta('7d')
1090
1886
datetime.timedelta(7)
1091
>>> string_to_delta(u'60s')
1887
>>> string_to_delta('60s')
1092
1888
datetime.timedelta(0, 60)
1093
>>> string_to_delta(u'60m')
1889
>>> string_to_delta('60m')
1094
1890
datetime.timedelta(0, 3600)
1095
>>> string_to_delta(u'24h')
1891
>>> string_to_delta('24h')
1096
1892
datetime.timedelta(1)
1097
>>> string_to_delta(u'1w')
1893
>>> string_to_delta('1w')
1098
1894
datetime.timedelta(7)
1099
>>> string_to_delta(u'5m 30s')
1895
>>> string_to_delta('5m 30s')
1100
1896
datetime.timedelta(0, 330)
1101
1897
"""
1102
1898
timevalue = datetime.timedelta(0)
1104
1900
try:
1105
1901
suffix = unicode(s[-1])
1106
1902
value = int(s[:-1])
1107
if suffix == u"d":
1903
if suffix == "d":
1108
1904
delta = datetime.timedelta(value)
1109
elif suffix == u"s":
1905
elif suffix == "s":
1110
1906
delta = datetime.timedelta(0, value)
1111
elif suffix == u"m":
1907
elif suffix == "m":
1112
1908
delta = datetime.timedelta(0, 0, 0, 0, value)
1113
elif suffix == u"h":
1909
elif suffix == "h":
1114
1910
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1115
elif suffix == u"w":
1911
elif suffix == "w":
1116
1912
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1117
1913
else:
1118
raise ValueError
1119
except (ValueError, IndexError):
1120
raise ValueError
1914
raise ValueError("Unknown suffix %r" % suffix)
1915
except (ValueError, IndexError) as e:
1916
raise ValueError(*(e.args))
1121
1917
timevalue += delta
1122
1918
return timevalue
1123
1919
1124
1920
1125
def if_nametoindex(interface):
1126
"""Call the C function if_nametoindex(), or equivalent
1127
1128
Note: This function cannot accept a unicode string."""
1129
global if_nametoindex
1130
try:
1131
if_nametoindex = (ctypes.cdll.LoadLibrary
1132
(ctypes.util.find_library(u"c"))
1133
.if_nametoindex)
1134
except (OSError, AttributeError):
1135
logger.warning(u"Doing if_nametoindex the hard way")
1136
def if_nametoindex(interface):
1137
"Get an interface index the hard way, i.e. using fcntl()"
1138
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1139
with closing(socket.socket()) as s:
1140
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1141
struct.pack(str(u"16s16x"),
1142
interface))
1143
interface_index = struct.unpack(str(u"I"),
1144
ifreq[16:20])[0]
1145
return interface_index
1146
return if_nametoindex(interface)
1147
1148
1149
1921
def daemon(nochdir = False, noclose = False):
1150
1922
"""See daemon(3). Standard BSD Unix function.
1151
1923
1154
1926
sys.exit()
1155
1927
os.setsid()
1156
1928
if not nochdir:
1157
os.chdir(u"/")
1929
os.chdir("/")
1158
1930
if os.fork():
1159
1931
sys.exit()
1160
1932
if not noclose:
1162
1934
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1163
1935
if not stat.S_ISCHR(os.fstat(null).st_mode):
1164
1936
raise OSError(errno.ENODEV,
1165
u"/dev/null not a character device")
1937
"%s not a character device"
1938
% os.path.devnull)
1166
1939
os.dup2(null, sys.stdin.fileno())
1167
1940
os.dup2(null, sys.stdout.fileno())
1168
1941
os.dup2(null, sys.stderr.fileno())
1172
1945
1173
1946
def main():
1174
1947
1175
######################################################################
1948
##################################################################
1176
1949
# Parsing of options, both command line and config file
1177
1950
1178
parser = optparse.OptionParser(version = "%%prog %s" % version)
1179
parser.add_option("-i", u"--interface", type=u"string",
1180
metavar="IF", help=u"Bind to interface IF")
1181
parser.add_option("-a", u"--address", type=u"string",
1182
help=u"Address to listen for requests on")
1183
parser.add_option("-p", u"--port", type=u"int",
1184
help=u"Port number to receive requests on")
1185
parser.add_option("--check", action=u"store_true",
1186
help=u"Run self-test")
1187
parser.add_option("--debug", action=u"store_true",
1188
help=u"Debug mode; run in foreground and log to"
1189
u" terminal")
1190
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1191
u" priority string (see GnuTLS documentation)")
1192
parser.add_option("--servicename", type=u"string",
1193
metavar=u"NAME", help=u"Zeroconf service name")
1194
parser.add_option("--configdir", type=u"string",
1195
default=u"/etc/mandos", metavar=u"DIR",
1196
help=u"Directory to search for configuration"
1197
u" files")
1198
parser.add_option("--no-dbus", action=u"store_false",
1199
dest=u"use_dbus", help=u"Do not provide D-Bus"
1200
u" system bus interface")
1201
parser.add_option("--no-ipv6", action=u"store_false",
1202
dest=u"use_ipv6", help=u"Do not use IPv6")
1203
options = parser.parse_args()[0]
1951
parser = argparse.ArgumentParser()
1952
parser.add_argument("-v", "--version", action="version",
1953
version = "%%(prog)s %s" % version,
1954
help="show version number and exit")
1955
parser.add_argument("-i", "--interface", metavar="IF",
1956
help="Bind to interface IF")
1957
parser.add_argument("-a", "--address",
1958
help="Address to listen for requests on")
1959
parser.add_argument("-p", "--port", type=int,
1960
help="Port number to receive requests on")
1961
parser.add_argument("--check", action="store_true",
1962
help="Run self-test")
1963
parser.add_argument("--debug", action="store_true",
1964
help="Debug mode; run in foreground and log"
1965
" to terminal")
1966
parser.add_argument("--debuglevel", metavar="LEVEL",
1967
help="Debug level for stdout output")
1968
parser.add_argument("--priority", help="GnuTLS"
1969
" priority string (see GnuTLS documentation)")
1970
parser.add_argument("--servicename",
1971
metavar="NAME", help="Zeroconf service name")
1972
parser.add_argument("--configdir",
1973
default="/etc/mandos", metavar="DIR",
1974
help="Directory to search for configuration"
1975
" files")
1976
parser.add_argument("--no-dbus", action="store_false",
1977
dest="use_dbus", help="Do not provide D-Bus"
1978
" system bus interface")
1979
parser.add_argument("--no-ipv6", action="store_false",
1980
dest="use_ipv6", help="Do not use IPv6")
1981
parser.add_argument("--no-restore", action="store_false",
1982
dest="restore", help="Do not restore stored"
1983
" state")
1984
parser.add_argument("--statedir", metavar="DIR",
1985
help="Directory to save/restore state in")
1986
1987
options = parser.parse_args()
1204
1988
1205
1989
if options.check:
1206
1990
import doctest
1208
1992
sys.exit()
1209
1993
1210
1994
# Default values for config file for server-global settings
1211
server_defaults = { u"interface": u"",
1212
u"address": u"",
1213
u"port": u"",
1214
u"debug": u"False",
1215
u"priority":
1216
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1217
u"servicename": u"Mandos",
1218
u"use_dbus": u"True",
1219
u"use_ipv6": u"True",
1995
server_defaults = { "interface": "",
1996
"address": "",
1997
"port": "",
1998
"debug": "False",
1999
"priority":
2000
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2001
"servicename": "Mandos",
2002
"use_dbus": "True",
2003
"use_ipv6": "True",
2004
"debuglevel": "",
2005
"restore": "True",
2006
"statedir": "/var/lib/mandos"
1220
2007
}
1221
2008
1222
2009
# Parse config file for server-global settings
1223
2010
server_config = configparser.SafeConfigParser(server_defaults)
1224
2011
del server_defaults
1225
2012
server_config.read(os.path.join(options.configdir,
1226
u"mandos.conf"))
2013
"mandos.conf"))
1227
2014
# Convert the SafeConfigParser object to a dict
1228
2015
server_settings = server_config.defaults()
1229
2016
# Use the appropriate methods on the non-string config options
1230
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1231
server_settings[option] = server_config.getboolean(u"DEFAULT",
2017
for option in ("debug", "use_dbus", "use_ipv6"):
2018
server_settings[option] = server_config.getboolean("DEFAULT",
1232
2019
option)
1233
2020
if server_settings["port"]:
1234
server_settings["port"] = server_config.getint(u"DEFAULT",
1235
u"port")
2021
server_settings["port"] = server_config.getint("DEFAULT",
2022
"port")
1236
2023
del server_config
1237
2024
1238
2025
# Override the settings from the config file with command line
1239
2026
# options, if set.
1240
for option in (u"interface", u"address", u"port", u"debug",
1241
u"priority", u"servicename", u"configdir",
1242
u"use_dbus", u"use_ipv6"):
2027
for option in ("interface", "address", "port", "debug",
2028
"priority", "servicename", "configdir",
2029
"use_dbus", "use_ipv6", "debuglevel", "restore",
2030
"statedir"):
1243
2031
value = getattr(options, option)
1244
2032
if value is not None:
1245
2033
server_settings[option] = value
1253
2041
##################################################################
1254
2042
1255
2043
# For convenience
1256
debug = server_settings[u"debug"]
1257
use_dbus = server_settings[u"use_dbus"]
1258
use_ipv6 = server_settings[u"use_ipv6"]
1259
1260
if not debug:
1261
syslogger.setLevel(logging.WARNING)
1262
console.setLevel(logging.WARNING)
1263
1264
if server_settings[u"servicename"] != u"Mandos":
2044
debug = server_settings["debug"]
2045
debuglevel = server_settings["debuglevel"]
2046
use_dbus = server_settings["use_dbus"]
2047
use_ipv6 = server_settings["use_ipv6"]
2048
stored_state_path = os.path.join(server_settings["statedir"],
2049
stored_state_file)
2050
2051
if debug:
2052
initlogger(logging.DEBUG)
2053
else:
2054
if not debuglevel:
2055
initlogger()
2056
else:
2057
level = getattr(logging, debuglevel.upper())
2058
initlogger(level)
2059
2060
if server_settings["servicename"] != "Mandos":
1265
2061
syslogger.setFormatter(logging.Formatter
1266
(u'Mandos (%s) [%%(process)d]:'
1267
u' %%(levelname)s: %%(message)s'
1268
% server_settings[u"servicename"]))
2062
('Mandos (%s) [%%(process)d]:'
2063
' %%(levelname)s: %%(message)s'
2064
% server_settings["servicename"]))
1269
2065
1270
2066
# Parse config file with clients
1271
client_defaults = { u"timeout": u"1h",
1272
u"interval": u"5m",
1273
u"checker": u"fping -q -- %%(host)s",
1274
u"host": u"",
2067
client_defaults = { "timeout": "5m",
2068
"extended_timeout": "15m",
2069
"interval": "2m",
2070
"checker": "fping -q -- %%(host)s",
2071
"host": "",
2072
"approval_delay": "0s",
2073
"approval_duration": "1s",
1275
2074
}
1276
2075
client_config = configparser.SafeConfigParser(client_defaults)
1277
client_config.read(os.path.join(server_settings[u"configdir"],
1278
u"clients.conf"))
2076
client_config.read(os.path.join(server_settings["configdir"],
2077
"clients.conf"))
1279
2078
1280
2079
global mandos_dbus_service
1281
2080
mandos_dbus_service = None
1282
2081
1283
tcp_server = MandosServer((server_settings[u"address"],
1284
server_settings[u"port"]),
2082
tcp_server = MandosServer((server_settings["address"],
2083
server_settings["port"]),
1285
2084
ClientHandler,
1286
interface=server_settings[u"interface"],
2085
interface=(server_settings["interface"]
2086
or None),
1287
2087
use_ipv6=use_ipv6,
1288
2088
gnutls_priority=
1289
server_settings[u"priority"],
2089
server_settings["priority"],
1290
2090
use_dbus=use_dbus)
1291
pidfilename = u"/var/run/mandos.pid"
1292
try:
1293
pidfile = open(pidfilename, u"w")
1294
except IOError:
1295
logger.error(u"Could not open file %r", pidfilename)
2091
if not debug:
2092
pidfilename = "/var/run/mandos.pid"
2093
try:
2094
pidfile = open(pidfilename, "w")
2095
except IOError:
2096
logger.error("Could not open file %r", pidfilename)
1296
2097
1297
2098
try:
1298
uid = pwd.getpwnam(u"_mandos").pw_uid
1299
gid = pwd.getpwnam(u"_mandos").pw_gid
2099
uid = pwd.getpwnam("_mandos").pw_uid
2100
gid = pwd.getpwnam("_mandos").pw_gid
1300
2101
except KeyError:
1301
2102
try:
1302
uid = pwd.getpwnam(u"mandos").pw_uid
1303
gid = pwd.getpwnam(u"mandos").pw_gid
2103
uid = pwd.getpwnam("mandos").pw_uid
2104
gid = pwd.getpwnam("mandos").pw_gid
1304
2105
except KeyError:
1305
2106
try:
1306
uid = pwd.getpwnam(u"nobody").pw_uid
1307
gid = pwd.getpwnam(u"nobody").pw_gid
2107
uid = pwd.getpwnam("nobody").pw_uid
2108
gid = pwd.getpwnam("nobody").pw_gid
1308
2109
except KeyError:
1309
2110
uid = 65534
1310
2111
gid = 65534
1311
2112
try:
1312
2113
os.setgid(gid)
1313
2114
os.setuid(uid)
1314
except OSError, error:
2115
except OSError as error:
1315
2116
if error[0] != errno.EPERM:
1316
2117
raise error
1317
2118
1318
# Enable all possible GnuTLS debugging
1319
2119
if debug:
2120
# Enable all possible GnuTLS debugging
2121
1320
2122
# "Use a log level over 10 to enable all debugging options."
1321
2123
# - GnuTLS manual
1322
2124
gnutls.library.functions.gnutls_global_set_log_level(11)
1323
2125
1324
2126
@gnutls.library.types.gnutls_log_func
1325
2127
def debug_gnutls(level, string):
1326
logger.debug(u"GnuTLS: %s", string[:-1])
2128
logger.debug("GnuTLS: %s", string[:-1])
1327
2129
1328
2130
(gnutls.library.functions
1329
2131
.gnutls_global_set_log_function(debug_gnutls))
2132
2133
# Redirect stdin so all checkers get /dev/null
2134
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2135
os.dup2(null, sys.stdin.fileno())
2136
if null > 2:
2137
os.close(null)
2138
else:
2139
# No console logging
2140
logger.removeHandler(console)
2141
2142
# Need to fork before connecting to D-Bus
2143
if not debug:
2144
# Close all input and output, do double fork, etc.
2145
daemon()
1330
2146
1331
2147
global main_loop
1332
2148
# From the Avahi example code
1335
2151
bus = dbus.SystemBus()
1336
2152
# End of Avahi example code
1337
2153
if use_dbus:
1338
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2154
try:
2155
bus_name = dbus.service.BusName("se.recompile.Mandos",
2156
bus, do_not_queue=True)
2157
old_bus_name = (dbus.service.BusName
2158
("se.bsnet.fukt.Mandos", bus,
2159
do_not_queue=True))
2160
except dbus.exceptions.NameExistsException as e:
2161
logger.error(unicode(e) + ", disabling D-Bus")
2162
use_dbus = False
2163
server_settings["use_dbus"] = False
2164
tcp_server.use_dbus = False
1339
2165
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1340
service = AvahiService(name = server_settings[u"servicename"],
1341
servicetype = u"_mandos._tcp",
1342
protocol = protocol, bus = bus)
2166
service = AvahiServiceToSyslog(name =
2167
server_settings["servicename"],
2168
servicetype = "_mandos._tcp",
2169
protocol = protocol, bus = bus)
1343
2170
if server_settings["interface"]:
1344
2171
service.interface = (if_nametoindex
1345
(str(server_settings[u"interface"])))
2172
(str(server_settings["interface"])))
2173
2174
global multiprocessing_manager
2175
multiprocessing_manager = multiprocessing.Manager()
1346
2176
1347
2177
client_class = Client
1348
2178
if use_dbus:
1349
client_class = functools.partial(ClientDBus, bus = bus)
1350
tcp_server.clients.update(set(
1351
client_class(name = section,
1352
config= dict(client_config.items(section)))
1353
for section in client_config.sections()))
2179
client_class = functools.partial(ClientDBusTransitional,
2180
bus = bus)
2181
2182
special_settings = {
2183
# Some settings need to be accessd by special methods;
2184
# booleans need .getboolean(), etc. Here is a list of them:
2185
"approved_by_default":
2186
lambda section:
2187
client_config.getboolean(section, "approved_by_default"),
2188
"enabled":
2189
lambda section:
2190
client_config.getboolean(section, "enabled"),
2191
}
2192
# Construct a new dict of client settings of this form:
2193
# { client_name: {setting_name: value, ...}, ...}
2194
# with exceptions for any special settings as defined above
2195
client_settings = dict((clientname,
2196
dict((setting,
2197
(value
2198
if setting not in special_settings
2199
else special_settings[setting]
2200
(clientname)))
2201
for setting, value in
2202
client_config.items(clientname)))
2203
for clientname in client_config.sections())
2204
2205
old_client_settings = {}
2206
clients_data = []
2207
2208
# Get client data and settings from last running state.
2209
if server_settings["restore"]:
2210
try:
2211
with open(stored_state_path, "rb") as stored_state:
2212
clients_data, old_client_settings = (pickle.load
2213
(stored_state))
2214
os.remove(stored_state_path)
2215
except IOError as e:
2216
logger.warning("Could not load persistent state: {0}"
2217
.format(e))
2218
if e.errno != errno.ENOENT:
2219
raise
2220
2221
with Crypto() as crypt:
2222
for client in clients_data:
2223
client_name = client["name"]
2224
2225
# Decide which value to use after restoring saved state.
2226
# We have three different values: Old config file,
2227
# new config file, and saved state.
2228
# New config value takes precedence if it differs from old
2229
# config value, otherwise use saved state.
2230
for name, value in client_settings[client_name].items():
2231
try:
2232
# For each value in new config, check if it
2233
# differs from the old config value (Except for
2234
# the "secret" attribute)
2235
if (name != "secret" and
2236
value != old_client_settings[client_name]
2237
[name]):
2238
setattr(client, name, value)
2239
except KeyError:
2240
pass
2241
2242
# Clients who has passed its expire date can still be
2243
# enabled if its last checker was sucessful. Clients
2244
# whose checker failed before we stored its state is
2245
# assumed to have failed all checkers during downtime.
2246
if client["enabled"] and client["last_checked_ok"]:
2247
if ((datetime.datetime.utcnow()
2248
- client["last_checked_ok"])
2249
> client["interval"]):
2250
if client["last_checker_status"] != 0:
2251
client["enabled"] = False
2252
else:
2253
client["expires"] = (datetime.datetime
2254
.utcnow()
2255
+ client["timeout"])
2256
2257
client["changedstate"] = (multiprocessing_manager
2258
.Condition
2259
(multiprocessing_manager
2260
.Lock()))
2261
if use_dbus:
2262
new_client = (ClientDBusTransitional.__new__
2263
(ClientDBusTransitional))
2264
tcp_server.clients[client_name] = new_client
2265
new_client.bus = bus
2266
for name, value in client.iteritems():
2267
setattr(new_client, name, value)
2268
client_object_name = unicode(client_name).translate(
2269
{ord("."): ord("_"),
2270
ord("-"): ord("_")})
2271
new_client.dbus_object_path = (dbus.ObjectPath
2272
("/clients/"
2273
+ client_object_name))
2274
DBusObjectWithProperties.__init__(new_client,
2275
new_client.bus,
2276
new_client
2277
.dbus_object_path)
2278
else:
2279
tcp_server.clients[client_name] = (Client.__new__
2280
(Client))
2281
for name, value in client.iteritems():
2282
setattr(tcp_server.clients[client_name],
2283
name, value)
2284
2285
try:
2286
tcp_server.clients[client_name].secret = (
2287
crypt.decrypt(tcp_server.clients[client_name]
2288
.encrypted_secret,
2289
client_settings[client_name]
2290
["secret"]))
2291
except CryptoError:
2292
# If decryption fails, we use secret from new settings
2293
tcp_server.clients[client_name].secret = (
2294
client_settings[client_name]["secret"])
2295
2296
# Create/remove clients based on new changes made to config
2297
for clientname in set(old_client_settings) - set(client_settings):
2298
del tcp_server.clients[clientname]
2299
for clientname in set(client_settings) - set(old_client_settings):
2300
tcp_server.clients[clientname] = (client_class(name
2301
= clientname,
2302
config =
2303
client_settings
2304
[clientname]))
2305
1354
2306
if not tcp_server.clients:
1355
logger.warning(u"No clients defined")
1356
1357
if debug:
1358
# Redirect stdin so all checkers get /dev/null
1359
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1360
os.dup2(null, sys.stdin.fileno())
1361
if null > 2:
1362
os.close(null)
1363
else:
1364
# No console logging
1365
logger.removeHandler(console)
1366
# Close all input and output, do double fork, etc.
1367
daemon()
1368
1369
try:
1370
with closing(pidfile):
1371
pid = os.getpid()
1372
pidfile.write(str(pid) + "\n")
1373
del pidfile
1374
except IOError:
1375
logger.error(u"Could not write to file %r with PID %d",
1376
pidfilename, pid)
1377
except NameError:
1378
# "pidfile" was never created
1379
pass
1380
del pidfilename
1381
1382
def cleanup():
1383
"Cleanup function; run on exit"
1384
service.cleanup()
2307
logger.warning("No clients defined")
1385
2308
1386
while tcp_server.clients:
1387
client = tcp_server.clients.pop()
1388
client.disable_hook = None
1389
client.disable()
1390
1391
atexit.register(cleanup)
1392
1393
2309
if not debug:
2310
try:
2311
with pidfile:
2312
pid = os.getpid()
2313
pidfile.write(str(pid) + "\n".encode("utf-8"))
2314
del pidfile
2315
except IOError:
2316
logger.error("Could not write to file %r with PID %d",
2317
pidfilename, pid)
2318
except NameError:
2319
# "pidfile" was never created
2320
pass
2321
del pidfilename
2322
1394
2323
signal.signal(signal.SIGINT, signal.SIG_IGN)
2324
1395
2325
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1396
2326
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1397
2327
1399
2329
class MandosDBusService(dbus.service.Object):
1400
2330
"""A D-Bus proxy object"""
1401
2331
def __init__(self):
1402
dbus.service.Object.__init__(self, bus, u"/")
1403
_interface = u"se.bsnet.fukt.Mandos"
1404
1405
@dbus.service.signal(_interface, signature=u"oa{sv}")
1406
def ClientAdded(self, objpath, properties):
1407
"D-Bus signal"
1408
pass
1409
1410
@dbus.service.signal(_interface, signature=u"s")
1411
def ClientNotFound(self, fingerprint):
1412
"D-Bus signal"
1413
pass
1414
1415
@dbus.service.signal(_interface, signature=u"os")
2332
dbus.service.Object.__init__(self, bus, "/")
2333
_interface = "se.recompile.Mandos"
2334
2335
@dbus.service.signal(_interface, signature="o")
2336
def ClientAdded(self, objpath):
2337
"D-Bus signal"
2338
pass
2339
2340
@dbus.service.signal(_interface, signature="ss")
2341
def ClientNotFound(self, fingerprint, address):
2342
"D-Bus signal"
2343
pass
2344
2345
@dbus.service.signal(_interface, signature="os")
1416
2346
def ClientRemoved(self, objpath, name):
1417
2347
"D-Bus signal"
1418
2348
pass
1419
2349
1420
@dbus.service.method(_interface, out_signature=u"ao")
2350
@dbus.service.method(_interface, out_signature="ao")
1421
2351
def GetAllClients(self):
1422
2352
"D-Bus method"
1423
2353
return dbus.Array(c.dbus_object_path
1424
for c in tcp_server.clients)
2354
for c in
2355
tcp_server.clients.itervalues())
1425
2356
1426
2357
@dbus.service.method(_interface,
1427
out_signature=u"a{oa{sv}}")
2358
out_signature="a{oa{sv}}")
1428
2359
def GetAllClientsWithProperties(self):
1429
2360
"D-Bus method"
1430
2361
return dbus.Dictionary(
1431
((c.dbus_object_path, c.GetAllProperties())
1432
for c in tcp_server.clients),
1433
signature=u"oa{sv}")
2362
((c.dbus_object_path, c.GetAll(""))
2363
for c in tcp_server.clients.itervalues()),
2364
signature="oa{sv}")
1434
2365
1435
@dbus.service.method(_interface, in_signature=u"o")
2366
@dbus.service.method(_interface, in_signature="o")
1436
2367
def RemoveClient(self, object_path):
1437
2368
"D-Bus method"
1438
for c in tcp_server.clients:
2369
for c in tcp_server.clients.itervalues():
1439
2370
if c.dbus_object_path == object_path:
1440
tcp_server.clients.remove(c)
2371
del tcp_server.clients[c.name]
1441
2372
c.remove_from_connection()
1442
2373
# Don't signal anything except ClientRemoved
1443
c.disable(signal=False)
2374
c.disable(quiet=True)
1444
2375
# Emit D-Bus signal
1445
2376
self.ClientRemoved(object_path, c.name)
1446
2377
return
1447
raise KeyError
2378
raise KeyError(object_path)
1448
2379
1449
2380
del _interface
1450
2381
1451
mandos_dbus_service = MandosDBusService()
1452
1453
for client in tcp_server.clients:
2382
class MandosDBusServiceTransitional(MandosDBusService):
2383
__metaclass__ = AlternateDBusNamesMetaclass
2384
mandos_dbus_service = MandosDBusServiceTransitional()
2385
2386
def cleanup():
2387
"Cleanup function; run on exit"
2388
service.cleanup()
2389
2390
multiprocessing.active_children()
2391
if not (tcp_server.clients or client_settings):
2392
return
2393
2394
# Store client before exiting. Secrets are encrypted with key
2395
# based on what config file has. If config file is
2396
# removed/edited, old secret will thus be unrecovable.
2397
clients = []
2398
with Crypto() as crypt:
2399
for client in tcp_server.clients.itervalues():
2400
key = client_settings[client.name]["secret"]
2401
client.encrypted_secret = crypt.encrypt(client.secret,
2402
key)
2403
client_dict = {}
2404
2405
# A list of attributes that will not be stored when
2406
# shutting down.
2407
exclude = set(("bus", "changedstate", "secret"))
2408
for name, typ in (inspect.getmembers
2409
(dbus.service.Object)):
2410
exclude.add(name)
2411
2412
client_dict["encrypted_secret"] = (client
2413
.encrypted_secret)
2414
for attr in client.client_structure:
2415
if attr not in exclude:
2416
client_dict[attr] = getattr(client, attr)
2417
2418
clients.append(client_dict)
2419
del client_settings[client.name]["secret"]
2420
2421
try:
2422
with os.fdopen(os.open(stored_state_path,
2423
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2424
0600), "wb") as stored_state:
2425
pickle.dump((clients, client_settings), stored_state)
2426
except (IOError, OSError) as e:
2427
logger.warning("Could not save persistent state: {0}"
2428
.format(e))
2429
if e.errno not in (errno.ENOENT, errno.EACCES):
2430
raise
2431
2432
# Delete all clients, and settings from config
2433
while tcp_server.clients:
2434
name, client = tcp_server.clients.popitem()
2435
if use_dbus:
2436
client.remove_from_connection()
2437
# Don't signal anything except ClientRemoved
2438
client.disable(quiet=True)
2439
if use_dbus:
2440
# Emit D-Bus signal
2441
mandos_dbus_service.ClientRemoved(client
2442
.dbus_object_path,
2443
client.name)
2444
client_settings.clear()
2445
2446
atexit.register(cleanup)
2447
2448
for client in tcp_server.clients.itervalues():
1454
2449
if use_dbus:
1455
2450
# Emit D-Bus signal
1456
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1457
client.GetAllProperties())
1458
client.enable()
2451
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2452
# Need to initiate checking of clients
2453
if client.enabled:
2454
client.init_checker()
1459
2455
1460
2456
tcp_server.enable()
1461
2457
tcp_server.server_activate()
1463
2459
# Find out what port we got
1464
2460
service.port = tcp_server.socket.getsockname()[1]
1465
2461
if use_ipv6:
1466
logger.info(u"Now listening on address %r, port %d,"
2462
logger.info("Now listening on address %r, port %d,"
1467
2463
" flowinfo %d, scope_id %d"
1468
2464
% tcp_server.socket.getsockname())
1469
2465
else: # IPv4
1470
logger.info(u"Now listening on address %r, port %d"
2466
logger.info("Now listening on address %r, port %d"
1471
2467
% tcp_server.socket.getsockname())
1472
2468
1473
2469
#service.interface = tcp_server.socket.getsockname()[3]
1476
2472
# From the Avahi example code
1477
2473
try:
1478
2474
service.activate()
1479
except dbus.exceptions.DBusException, error:
1480
logger.critical(u"DBusException: %s", error)
2475
except dbus.exceptions.DBusException as error:
2476
logger.critical("DBusException: %s", error)
2477
cleanup()
1481
2478
sys.exit(1)
1482
2479
# End of Avahi example code
1483
2480
1486
2483
(tcp_server.handle_request
1487
2484
(*args[2:], **kwargs) or True))
1488
2485
1489
logger.debug(u"Starting main loop")
2486
logger.debug("Starting main loop")
1490
2487
main_loop.run()
1491
except AvahiError, error:
1492
logger.critical(u"AvahiError: %s", error)
2488
except AvahiError as error:
2489
logger.critical("AvahiError: %s", error)
2490
cleanup()
1493
2491
sys.exit(1)
1494
2492
except KeyboardInterrupt:
1495
2493
if debug:
1496
print >> sys.stderr
1497
logger.debug(u"Server received KeyboardInterrupt")
1498
logger.debug(u"Server exiting")
2494
print("", file=sys.stderr)
2495
logger.debug("Server received KeyboardInterrupt")
2496
logger.debug("Server exiting")
2497
# Must run before the D-Bus bus name gets deregistered
2498
cleanup()
2499
1499
2500
1500
2501
if __name__ == '__main__':
1501
2502
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0