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- Committer: Björn Påhlsson
- Date: 2011-12-21 00:33:12 UTC
- mfrom: (505.2.13 mandos-client-network-hooks)
- Revision ID: belorn@recompile.se-20111221003312-jwn6d76u2c2lejoz
working new feature: network-hooks - Enables user-scripts to take up
interfaces during bootup
interfaces during bootup
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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16
#
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# This program is free software: you can redistribute it and/or modify
18
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# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
35
36
36
37
import SocketServer as socketserver
37
38
import socket
38
import optparse
39
import argparse
39
40
import datetime
40
41
import errno
41
42
import gnutls.crypto
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56
import logging
56
57
import logging.handlers
57
58
import pwd
58
from contextlib import closing
59
import contextlib
59
60
import struct
60
61
import fcntl
61
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
67
import tempfile
62
68
63
69
import dbus
64
70
import dbus.service
67
73
from dbus.mainloop.glib import DBusGMainLoop
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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
76
85
except ImportError:
77
86
SO_BINDTODEVICE = None
78
87
79
80
version = "1.0.8"
81
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logger = logging.Logger(u'mandos')
88
version = "1.4.1"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
83
92
syslogger = (logging.handlers.SysLogHandler
84
93
(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)
94
address = str("/dev/log")))
95
96
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
100
except (OSError, AttributeError):
101
def if_nametoindex(interface):
102
"Get an interface index the hard way, i.e. using fcntl()"
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
with contextlib.closing(socket.socket()) as s:
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
110
return interface_index
111
112
113
def initlogger(level=logging.WARNING):
114
"""init logger and add loglevel"""
115
116
syslogger.setFormatter(logging.Formatter
117
('Mandos [%(process)d]: %(levelname)s:'
118
' %(message)s'))
119
logger.addHandler(syslogger)
120
121
console = logging.StreamHandler()
122
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
123
' [%(process)d]:'
124
' %(levelname)s:'
125
' %(message)s'))
126
logger.addHandler(console)
127
logger.setLevel(level)
128
129
130
class PGPError(Exception):
131
"""Exception if encryption/decryption fails"""
132
pass
133
134
135
class PGPEngine(object):
136
"""A simple class for OpenPGP symmetric encryption & decryption"""
137
def __init__(self):
138
self.gnupg = GnuPGInterface.GnuPG()
139
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.gnupg.options.meta_interactive = False
142
self.gnupg.options.homedir = self.tempdir
143
self.gnupg.options.extra_args.extend(['--force-mdc',
144
'--quiet'])
145
146
def __enter__(self):
147
return self
148
149
def __exit__ (self, exc_type, exc_value, traceback):
150
self._cleanup()
151
return False
152
153
def __del__(self):
154
self._cleanup()
155
156
def _cleanup(self):
157
if self.tempdir is not None:
158
# Delete contents of tempdir
159
for root, dirs, files in os.walk(self.tempdir,
160
topdown = False):
161
for filename in files:
162
os.remove(os.path.join(root, filename))
163
for dirname in dirs:
164
os.rmdir(os.path.join(root, dirname))
165
# Remove tempdir
166
os.rmdir(self.tempdir)
167
self.tempdir = None
168
169
def password_encode(self, password):
170
# Passphrase can not be empty and can not contain newlines or
171
# NUL bytes. So we prefix it and hex encode it.
172
return b"mandos" + binascii.hexlify(password)
173
174
def encrypt(self, data, password):
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
177
try:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
182
f.write(data)
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
185
proc.wait()
186
except IOError as e:
187
raise PGPError(e)
188
self.gnupg.passphrase = None
189
return ciphertext
190
191
def decrypt(self, data, password):
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
194
try:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
199
f.write(data)
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
202
proc.wait()
203
except IOError as e:
204
raise PGPError(e)
205
self.gnupg.passphrase = None
206
return decrypted_plaintext
207
208
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
last_checker_status: integer between 0 and 255 reflecting exit
415
status of last checker. -1 reflects crashed
416
checker, or None.
417
last_enabled: datetime.datetime(); (UTC) or None
418
name: string; from the config file, used in log messages and
419
D-Bus identifiers
420
secret: bytestring; sent verbatim (over TLS) to client
421
timeout: datetime.timedelta(); How long from last_checked_ok
422
until this client is disabled
423
extended_timeout: extra long timeout when password has been sent
424
runtime_expansions: Allowed attributes for runtime expansion.
425
expires: datetime.datetime(); time (UTC) when a client will be
426
disabled, or None
256
427
"""
257
428
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))
429
runtime_expansions = ("approval_delay", "approval_duration",
430
"created", "enabled", "fingerprint",
431
"host", "interval", "last_checked_ok",
432
"last_enabled", "name", "timeout")
433
client_defaults = { "timeout": "5m",
434
"extended_timeout": "15m",
435
"interval": "2m",
436
"checker": "fping -q -- %%(host)s",
437
"host": "",
438
"approval_delay": "0s",
439
"approval_duration": "1s",
440
"approved_by_default": "True",
441
"enabled": "True",
442
}
264
443
265
444
def timeout_milliseconds(self):
266
445
"Return the 'timeout' attribute in milliseconds"
267
return self._datetime_to_milliseconds(self.timeout)
446
return timedelta_to_milliseconds(self.timeout)
447
448
def extended_timeout_milliseconds(self):
449
"Return the 'extended_timeout' attribute in milliseconds"
450
return timedelta_to_milliseconds(self.extended_timeout)
268
451
269
452
def interval_milliseconds(self):
270
453
"Return the 'interval' attribute in milliseconds"
271
return self._datetime_to_milliseconds(self.interval)
454
return timedelta_to_milliseconds(self.interval)
272
455
273
def __init__(self, name = None, disable_hook=None, config=None):
456
def approval_delay_milliseconds(self):
457
return timedelta_to_milliseconds(self.approval_delay)
458
459
@staticmethod
460
def config_parser(config):
461
""" Construct a new dict of client settings of this form:
462
{ client_name: {setting_name: value, ...}, ...}
463
with exceptions for any special settings as defined above"""
464
settings = {}
465
for client_name in config.sections():
466
section = dict(config.items(client_name))
467
client = settings[client_name] = {}
468
469
client["host"] = section["host"]
470
# Reformat values from string types to Python types
471
client["approved_by_default"] = config.getboolean(
472
client_name, "approved_by_default")
473
client["enabled"] = config.getboolean(client_name, "enabled")
474
475
client["fingerprint"] = (section["fingerprint"].upper()
476
.replace(" ", ""))
477
if "secret" in section:
478
client["secret"] = section["secret"].decode("base64")
479
elif "secfile" in section:
480
with open(os.path.expanduser(os.path.expandvars
481
(section["secfile"])),
482
"rb") as secfile:
483
client["secret"] = secfile.read()
484
else:
485
raise TypeError("No secret or secfile for section %s"
486
% section)
487
client["timeout"] = string_to_delta(section["timeout"])
488
client["extended_timeout"] = string_to_delta(
489
section["extended_timeout"])
490
client["interval"] = string_to_delta(section["interval"])
491
client["approval_delay"] = string_to_delta(
492
section["approval_delay"])
493
client["approval_duration"] = string_to_delta(
494
section["approval_duration"])
495
client["checker_command"] = section["checker"]
496
client["last_approval_request"] = None
497
client["last_checked_ok"] = None
498
client["last_checker_status"] = None
499
if client["enabled"]:
500
client["last_enabled"] = datetime.datetime.utcnow()
501
client["expires"] = (datetime.datetime.utcnow()
502
+ client["timeout"])
503
else:
504
client["last_enabled"] = None
505
client["expires"] = None
506
507
return settings
508
509
510
def __init__(self, settings, name = None):
274
511
"""Note: the 'checker' key in 'config' sets the
275
512
'checker_command' attribute and *not* the 'checker'
276
513
attribute."""
277
514
self.name = name
278
if config is None:
279
config = {}
280
logger.debug(u"Creating client %r", self.name)
515
# adding all client settings
516
for setting, value in settings.iteritems():
517
setattr(self, setting, value)
518
519
logger.debug("Creating client %r", self.name)
281
520
# Uppercase and remove spaces from fingerprint for later
282
521
# comparison purposes with return value from the fingerprint()
283
522
# 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:
293
self.secret = secfile.read()
294
else:
295
raise TypeError(u"No secret or secfile for client %s"
296
% self.name)
297
self.host = config.get(u"host", u"")
298
self.created = datetime.datetime.utcnow()
299
self.enabled = False
300
self.last_enabled = None
301
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
523
logger.debug(" Fingerprint: %s", self.fingerprint)
524
self.created = settings.get("created", datetime.datetime.utcnow())
525
526
# attributes specific for this server instance
305
527
self.checker = None
306
528
self.checker_initiator_tag = None
307
529
self.disable_initiator_tag = None
308
530
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
310
531
self.current_checker_command = None
311
self.last_connect = None
532
self.approved = None
533
self.approvals_pending = 0
534
self.changedstate = (multiprocessing_manager
535
.Condition(multiprocessing_manager
536
.Lock()))
537
self.client_structure = [attr for attr in
538
self.__dict__.iterkeys()
539
if not attr.startswith("_")]
540
self.client_structure.append("client_structure")
541
542
for name, t in inspect.getmembers(type(self),
543
lambda obj:
544
isinstance(obj,
545
property)):
546
if not name.startswith("_"):
547
self.client_structure.append(name)
548
549
# Send notice to process children that client state has changed
550
def send_changedstate(self):
551
with self.changedstate:
552
self.changedstate.notify_all()
312
553
313
554
def enable(self):
314
555
"""Start this client's checker and timeout hooks"""
556
if getattr(self, "enabled", False):
557
# Already enabled
558
return
559
self.send_changedstate()
560
self.expires = datetime.datetime.utcnow() + self.timeout
561
self.enabled = True
315
562
self.last_enabled = datetime.datetime.utcnow()
563
self.init_checker()
564
565
def disable(self, quiet=True):
566
"""Disable this client."""
567
if not getattr(self, "enabled", False):
568
return False
569
if not quiet:
570
self.send_changedstate()
571
if not quiet:
572
logger.info("Disabling client %s", self.name)
573
if getattr(self, "disable_initiator_tag", False):
574
gobject.source_remove(self.disable_initiator_tag)
575
self.disable_initiator_tag = None
576
self.expires = None
577
if getattr(self, "checker_initiator_tag", False):
578
gobject.source_remove(self.checker_initiator_tag)
579
self.checker_initiator_tag = None
580
self.stop_checker()
581
self.enabled = False
582
# Do not run this again if called by a gobject.timeout_add
583
return False
584
585
def __del__(self):
586
self.disable()
587
588
def init_checker(self):
316
589
# Schedule a new checker to be started an 'interval' from now,
317
590
# and every interval from then on.
318
591
self.checker_initiator_tag = (gobject.timeout_add
319
592
(self.interval_milliseconds(),
320
593
self.start_checker))
321
# Also start a new checker *right now*.
322
self.start_checker()
323
594
# Schedule a disable() when 'timeout' has passed
324
595
self.disable_initiator_tag = (gobject.timeout_add
325
596
(self.timeout_milliseconds(),
326
597
self.disable))
327
self.enabled = True
328
329
def disable(self):
330
"""Disable this client."""
331
if not getattr(self, "enabled", False):
332
return False
333
logger.info(u"Disabling client %s", self.name)
334
if getattr(self, u"disable_initiator_tag", False):
335
gobject.source_remove(self.disable_initiator_tag)
336
self.disable_initiator_tag = None
337
if getattr(self, u"checker_initiator_tag", False):
338
gobject.source_remove(self.checker_initiator_tag)
339
self.checker_initiator_tag = None
340
self.stop_checker()
341
if self.disable_hook:
342
self.disable_hook(self)
343
self.enabled = False
344
# Do not run this again if called by a gobject.timeout_add
345
return False
346
347
def __del__(self):
348
self.disable_hook = None
349
self.disable()
598
# Also start a new checker *right now*.
599
self.start_checker()
350
600
351
601
def checker_callback(self, pid, condition, command):
352
602
"""The checker has completed, so take appropriate actions."""
353
603
self.checker_callback_tag = None
354
604
self.checker = None
355
605
if os.WIFEXITED(condition):
356
exitstatus = os.WEXITSTATUS(condition)
357
if exitstatus == 0:
358
logger.info(u"Checker for %(name)s succeeded",
606
self.last_checker_status = os.WEXITSTATUS(condition)
607
if self.last_checker_status == 0:
608
logger.info("Checker for %(name)s succeeded",
359
609
vars(self))
360
610
self.checked_ok()
361
611
else:
362
logger.info(u"Checker for %(name)s failed",
612
logger.info("Checker for %(name)s failed",
363
613
vars(self))
364
614
else:
365
logger.warning(u"Checker for %(name)s crashed?",
615
self.last_checker_status = -1
616
logger.warning("Checker for %(name)s crashed?",
366
617
vars(self))
367
618
368
def checked_ok(self):
619
def checked_ok(self, timeout=None):
369
620
"""Bump up the timeout for this client.
370
621
371
622
This should only be called when the client has been seen,
372
623
alive and well.
373
624
"""
625
if timeout is None:
626
timeout = self.timeout
374
627
self.last_checked_ok = datetime.datetime.utcnow()
375
gobject.source_remove(self.disable_initiator_tag)
376
self.disable_initiator_tag = (gobject.timeout_add
377
(self.timeout_milliseconds(),
378
self.disable))
628
if self.disable_initiator_tag is not None:
629
gobject.source_remove(self.disable_initiator_tag)
630
if getattr(self, "enabled", False):
631
self.disable_initiator_tag = (gobject.timeout_add
632
(timedelta_to_milliseconds
633
(timeout), self.disable))
634
self.expires = datetime.datetime.utcnow() + timeout
635
636
def need_approval(self):
637
self.last_approval_request = datetime.datetime.utcnow()
379
638
380
639
def start_checker(self):
381
640
"""Start a new checker subprocess if one is not running.
388
647
# client would inevitably timeout, since no checker would get
389
648
# a chance to run to completion. If we instead leave running
390
649
# checkers alone, the checker would have to take more time
391
# than 'timeout' for the client to be declared invalid, which
392
# is as it should be.
650
# than 'timeout' for the client to be disabled, which is as it
651
# should be.
393
652
394
653
# If a checker exists, make sure it is not a zombie
395
if self.checker is not None:
654
try:
396
655
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
656
except (AttributeError, OSError) as error:
657
if (isinstance(error, OSError)
658
and error.errno != errno.ECHILD):
659
raise error
660
else:
397
661
if pid:
398
logger.warning(u"Checker was a zombie")
662
logger.warning("Checker was a zombie")
399
663
gobject.source_remove(self.checker_callback_tag)
400
664
self.checker_callback(pid, status,
401
665
self.current_checker_command)
406
670
command = self.checker_command % self.host
407
671
except TypeError:
408
672
# Escape attributes for the shell
409
escaped_attrs = dict((key,
410
re.escape(unicode(str(val),
411
errors=
412
u'replace')))
413
for key, val in
414
vars(self).iteritems())
673
escaped_attrs = dict(
674
(attr,
675
re.escape(unicode(str(getattr(self, attr, "")),
676
errors=
677
'replace')))
678
for attr in
679
self.runtime_expansions)
680
415
681
try:
416
682
command = self.checker_command % escaped_attrs
417
except TypeError, error:
418
logger.error(u'Could not format string "%s":'
419
u' %s', self.checker_command, error)
683
except TypeError as error:
684
logger.error('Could not format string "%s":'
685
' %s', self.checker_command, error)
420
686
return True # Try again later
421
687
self.current_checker_command = command
422
688
try:
423
logger.info(u"Starting checker %r for %s",
689
logger.info("Starting checker %r for %s",
424
690
command, self.name)
425
691
# We don't need to redirect stdout and stderr, since
426
692
# in normal mode, that is already done by daemon(),
428
694
# always replaced by /dev/null.)
429
695
self.checker = subprocess.Popen(command,
430
696
close_fds=True,
431
shell=True, cwd=u"/")
697
shell=True, cwd="/")
432
698
self.checker_callback_tag = (gobject.child_watch_add
433
699
(self.checker.pid,
434
700
self.checker_callback,
439
705
if pid:
440
706
gobject.source_remove(self.checker_callback_tag)
441
707
self.checker_callback(pid, status, command)
442
except OSError, error:
443
logger.error(u"Failed to start subprocess: %s",
708
except OSError as error:
709
logger.error("Failed to start subprocess: %s",
444
710
error)
445
711
# Re-run this periodically if run by gobject.timeout_add
446
712
return True
450
716
if self.checker_callback_tag:
451
717
gobject.source_remove(self.checker_callback_tag)
452
718
self.checker_callback_tag = None
453
if getattr(self, u"checker", None) is None:
719
if getattr(self, "checker", None) is None:
454
720
return
455
logger.debug(u"Stopping checker for %(name)s", vars(self))
721
logger.debug("Stopping checker for %(name)s", vars(self))
456
722
try:
457
723
os.kill(self.checker.pid, signal.SIGTERM)
458
#os.sleep(0.5)
724
#time.sleep(0.5)
459
725
#if self.checker.poll() is None:
460
726
# os.kill(self.checker.pid, signal.SIGKILL)
461
except OSError, error:
727
except OSError as error:
462
728
if error.errno != errno.ESRCH: # No such process
463
729
raise
464
730
self.checker = None
465
466
def still_valid(self):
467
"""Has the timeout not yet passed for this client?"""
468
if not getattr(self, u"enabled", False):
469
return False
470
now = datetime.datetime.utcnow()
471
if self.last_checked_ok is None:
472
return now < (self.created + self.timeout)
473
else:
474
return now < (self.last_checked_ok + self.timeout)
475
476
477
class ClientDBus(Client, dbus.service.Object):
731
732
733
def dbus_service_property(dbus_interface, signature="v",
734
access="readwrite", byte_arrays=False):
735
"""Decorators for marking methods of a DBusObjectWithProperties to
736
become properties on the D-Bus.
737
738
The decorated method will be called with no arguments by "Get"
739
and with one argument by "Set".
740
741
The parameters, where they are supported, are the same as
742
dbus.service.method, except there is only "signature", since the
743
type from Get() and the type sent to Set() is the same.
744
"""
745
# Encoding deeply encoded byte arrays is not supported yet by the
746
# "Set" method, so we fail early here:
747
if byte_arrays and signature != "ay":
748
raise ValueError("Byte arrays not supported for non-'ay'"
749
" signature %r" % signature)
750
def decorator(func):
751
func._dbus_is_property = True
752
func._dbus_interface = dbus_interface
753
func._dbus_signature = signature
754
func._dbus_access = access
755
func._dbus_name = func.__name__
756
if func._dbus_name.endswith("_dbus_property"):
757
func._dbus_name = func._dbus_name[:-14]
758
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
759
return func
760
return decorator
761
762
763
class DBusPropertyException(dbus.exceptions.DBusException):
764
"""A base class for D-Bus property-related exceptions
765
"""
766
def __unicode__(self):
767
return unicode(str(self))
768
769
770
class DBusPropertyAccessException(DBusPropertyException):
771
"""A property's access permissions disallows an operation.
772
"""
773
pass
774
775
776
class DBusPropertyNotFound(DBusPropertyException):
777
"""An attempt was made to access a non-existing property.
778
"""
779
pass
780
781
782
class DBusObjectWithProperties(dbus.service.Object):
783
"""A D-Bus object with properties.
784
785
Classes inheriting from this can use the dbus_service_property
786
decorator to expose methods as D-Bus properties. It exposes the
787
standard Get(), Set(), and GetAll() methods on the D-Bus.
788
"""
789
790
@staticmethod
791
def _is_dbus_property(obj):
792
return getattr(obj, "_dbus_is_property", False)
793
794
def _get_all_dbus_properties(self):
795
"""Returns a generator of (name, attribute) pairs
796
"""
797
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
798
for cls in self.__class__.__mro__
799
for name, prop in
800
inspect.getmembers(cls, self._is_dbus_property))
801
802
def _get_dbus_property(self, interface_name, property_name):
803
"""Returns a bound method if one exists which is a D-Bus
804
property with the specified name and interface.
805
"""
806
for cls in self.__class__.__mro__:
807
for name, value in (inspect.getmembers
808
(cls, self._is_dbus_property)):
809
if (value._dbus_name == property_name
810
and value._dbus_interface == interface_name):
811
return value.__get__(self)
812
813
# No such property
814
raise DBusPropertyNotFound(self.dbus_object_path + ":"
815
+ interface_name + "."
816
+ property_name)
817
818
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
819
out_signature="v")
820
def Get(self, interface_name, property_name):
821
"""Standard D-Bus property Get() method, see D-Bus standard.
822
"""
823
prop = self._get_dbus_property(interface_name, property_name)
824
if prop._dbus_access == "write":
825
raise DBusPropertyAccessException(property_name)
826
value = prop()
827
if not hasattr(value, "variant_level"):
828
return value
829
return type(value)(value, variant_level=value.variant_level+1)
830
831
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
832
def Set(self, interface_name, property_name, value):
833
"""Standard D-Bus property Set() method, see D-Bus standard.
834
"""
835
prop = self._get_dbus_property(interface_name, property_name)
836
if prop._dbus_access == "read":
837
raise DBusPropertyAccessException(property_name)
838
if prop._dbus_get_args_options["byte_arrays"]:
839
# The byte_arrays option is not supported yet on
840
# signatures other than "ay".
841
if prop._dbus_signature != "ay":
842
raise ValueError
843
value = dbus.ByteArray(''.join(unichr(byte)
844
for byte in value))
845
prop(value)
846
847
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
848
out_signature="a{sv}")
849
def GetAll(self, interface_name):
850
"""Standard D-Bus property GetAll() method, see D-Bus
851
standard.
852
853
Note: Will not include properties with access="write".
854
"""
855
properties = {}
856
for name, prop in self._get_all_dbus_properties():
857
if (interface_name
858
and interface_name != prop._dbus_interface):
859
# Interface non-empty but did not match
860
continue
861
# Ignore write-only properties
862
if prop._dbus_access == "write":
863
continue
864
value = prop()
865
if not hasattr(value, "variant_level"):
866
properties[name] = value
867
continue
868
properties[name] = type(value)(value, variant_level=
869
value.variant_level+1)
870
return dbus.Dictionary(properties, signature="sv")
871
872
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
873
out_signature="s",
874
path_keyword='object_path',
875
connection_keyword='connection')
876
def Introspect(self, object_path, connection):
877
"""Standard D-Bus method, overloaded to insert property tags.
878
"""
879
xmlstring = dbus.service.Object.Introspect(self, object_path,
880
connection)
881
try:
882
document = xml.dom.minidom.parseString(xmlstring)
883
def make_tag(document, name, prop):
884
e = document.createElement("property")
885
e.setAttribute("name", name)
886
e.setAttribute("type", prop._dbus_signature)
887
e.setAttribute("access", prop._dbus_access)
888
return e
889
for if_tag in document.getElementsByTagName("interface"):
890
for tag in (make_tag(document, name, prop)
891
for name, prop
892
in self._get_all_dbus_properties()
893
if prop._dbus_interface
894
== if_tag.getAttribute("name")):
895
if_tag.appendChild(tag)
896
# Add the names to the return values for the
897
# "org.freedesktop.DBus.Properties" methods
898
if (if_tag.getAttribute("name")
899
== "org.freedesktop.DBus.Properties"):
900
for cn in if_tag.getElementsByTagName("method"):
901
if cn.getAttribute("name") == "Get":
902
for arg in cn.getElementsByTagName("arg"):
903
if (arg.getAttribute("direction")
904
== "out"):
905
arg.setAttribute("name", "value")
906
elif cn.getAttribute("name") == "GetAll":
907
for arg in cn.getElementsByTagName("arg"):
908
if (arg.getAttribute("direction")
909
== "out"):
910
arg.setAttribute("name", "props")
911
xmlstring = document.toxml("utf-8")
912
document.unlink()
913
except (AttributeError, xml.dom.DOMException,
914
xml.parsers.expat.ExpatError) as error:
915
logger.error("Failed to override Introspection method",
916
error)
917
return xmlstring
918
919
920
def datetime_to_dbus (dt, variant_level=0):
921
"""Convert a UTC datetime.datetime() to a D-Bus type."""
922
if dt is None:
923
return dbus.String("", variant_level = variant_level)
924
return dbus.String(dt.isoformat(),
925
variant_level=variant_level)
926
927
928
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
929
.__metaclass__):
930
"""Applied to an empty subclass of a D-Bus object, this metaclass
931
will add additional D-Bus attributes matching a certain pattern.
932
"""
933
def __new__(mcs, name, bases, attr):
934
# Go through all the base classes which could have D-Bus
935
# methods, signals, or properties in them
936
for base in (b for b in bases
937
if issubclass(b, dbus.service.Object)):
938
# Go though all attributes of the base class
939
for attrname, attribute in inspect.getmembers(base):
940
# Ignore non-D-Bus attributes, and D-Bus attributes
941
# with the wrong interface name
942
if (not hasattr(attribute, "_dbus_interface")
943
or not attribute._dbus_interface
944
.startswith("se.recompile.Mandos")):
945
continue
946
# Create an alternate D-Bus interface name based on
947
# the current name
948
alt_interface = (attribute._dbus_interface
949
.replace("se.recompile.Mandos",
950
"se.bsnet.fukt.Mandos"))
951
# Is this a D-Bus signal?
952
if getattr(attribute, "_dbus_is_signal", False):
953
# Extract the original non-method function by
954
# black magic
955
nonmethod_func = (dict(
956
zip(attribute.func_code.co_freevars,
957
attribute.__closure__))["func"]
958
.cell_contents)
959
# Create a new, but exactly alike, function
960
# object, and decorate it to be a new D-Bus signal
961
# with the alternate D-Bus interface name
962
new_function = (dbus.service.signal
963
(alt_interface,
964
attribute._dbus_signature)
965
(types.FunctionType(
966
nonmethod_func.func_code,
967
nonmethod_func.func_globals,
968
nonmethod_func.func_name,
969
nonmethod_func.func_defaults,
970
nonmethod_func.func_closure)))
971
# Define a creator of a function to call both the
972
# old and new functions, so both the old and new
973
# signals gets sent when the function is called
974
def fixscope(func1, func2):
975
"""This function is a scope container to pass
976
func1 and func2 to the "call_both" function
977
outside of its arguments"""
978
def call_both(*args, **kwargs):
979
"""This function will emit two D-Bus
980
signals by calling func1 and func2"""
981
func1(*args, **kwargs)
982
func2(*args, **kwargs)
983
return call_both
984
# Create the "call_both" function and add it to
985
# the class
986
attr[attrname] = fixscope(attribute,
987
new_function)
988
# Is this a D-Bus method?
989
elif getattr(attribute, "_dbus_is_method", False):
990
# Create a new, but exactly alike, function
991
# object. Decorate it to be a new D-Bus method
992
# with the alternate D-Bus interface name. Add it
993
# to the class.
994
attr[attrname] = (dbus.service.method
995
(alt_interface,
996
attribute._dbus_in_signature,
997
attribute._dbus_out_signature)
998
(types.FunctionType
999
(attribute.func_code,
1000
attribute.func_globals,
1001
attribute.func_name,
1002
attribute.func_defaults,
1003
attribute.func_closure)))
1004
# Is this a D-Bus property?
1005
elif getattr(attribute, "_dbus_is_property", False):
1006
# Create a new, but exactly alike, function
1007
# object, and decorate it to be a new D-Bus
1008
# property with the alternate D-Bus interface
1009
# name. Add it to the class.
1010
attr[attrname] = (dbus_service_property
1011
(alt_interface,
1012
attribute._dbus_signature,
1013
attribute._dbus_access,
1014
attribute
1015
._dbus_get_args_options
1016
["byte_arrays"])
1017
(types.FunctionType
1018
(attribute.func_code,
1019
attribute.func_globals,
1020
attribute.func_name,
1021
attribute.func_defaults,
1022
attribute.func_closure)))
1023
return type.__new__(mcs, name, bases, attr)
1024
1025
1026
class ClientDBus(Client, DBusObjectWithProperties):
478
1027
"""A Client class using D-Bus
479
1028
480
1029
Attributes:
481
1030
dbus_object_path: dbus.ObjectPath
482
1031
bus: dbus.SystemBus()
483
1032
"""
1033
1034
runtime_expansions = (Client.runtime_expansions
1035
+ ("dbus_object_path",))
1036
484
1037
# dbus.service.Object doesn't use super(), so we can't either.
485
1038
486
1039
def __init__(self, bus = None, *args, **kwargs):
487
1040
self.bus = bus
488
1041
Client.__init__(self, *args, **kwargs)
1042
self._approvals_pending = 0
1043
1044
self._approvals_pending = 0
489
1045
# Only now, when this client is initialized, can it show up on
490
1046
# the D-Bus
1047
client_object_name = unicode(self.name).translate(
1048
{ord("."): ord("_"),
1049
ord("-"): ord("_")})
491
1050
self.dbus_object_path = (dbus.ObjectPath
492
(u"/clients/"
493
+ self.name.replace(u".", u"_")))
494
dbus.service.Object.__init__(self, self.bus,
495
self.dbus_object_path)
496
497
@staticmethod
498
def _datetime_to_dbus(dt, variant_level=0):
499
"""Convert a UTC datetime.datetime() to a D-Bus type."""
500
return dbus.String(dt.isoformat(),
501
variant_level=variant_level)
502
503
def enable(self):
504
oldstate = getattr(self, u"enabled", False)
505
r = Client.enable(self)
506
if oldstate != self.enabled:
507
# Emit D-Bus signals
508
self.PropertyChanged(dbus.String(u"enabled"),
509
dbus.Boolean(True, variant_level=1))
510
self.PropertyChanged(
511
dbus.String(u"last_enabled"),
512
self._datetime_to_dbus(self.last_enabled,
513
variant_level=1))
514
return r
515
516
def disable(self, signal = True):
517
oldstate = getattr(self, u"enabled", False)
518
r = Client.disable(self)
519
if signal and oldstate != self.enabled:
520
# Emit D-Bus signal
521
self.PropertyChanged(dbus.String(u"enabled"),
522
dbus.Boolean(False, variant_level=1))
523
return r
1051
("/clients/" + client_object_name))
1052
DBusObjectWithProperties.__init__(self, self.bus,
1053
self.dbus_object_path)
1054
1055
def notifychangeproperty(transform_func,
1056
dbus_name, type_func=lambda x: x,
1057
variant_level=1):
1058
""" Modify a variable so that it's a property which announces
1059
its changes to DBus.
1060
1061
transform_fun: Function that takes a value and a variant_level
1062
and transforms it to a D-Bus type.
1063
dbus_name: D-Bus name of the variable
1064
type_func: Function that transform the value before sending it
1065
to the D-Bus. Default: no transform
1066
variant_level: D-Bus variant level. Default: 1
1067
"""
1068
attrname = "_{0}".format(dbus_name)
1069
def setter(self, value):
1070
if hasattr(self, "dbus_object_path"):
1071
if (not hasattr(self, attrname) or
1072
type_func(getattr(self, attrname, None))
1073
!= type_func(value)):
1074
dbus_value = transform_func(type_func(value),
1075
variant_level
1076
=variant_level)
1077
self.PropertyChanged(dbus.String(dbus_name),
1078
dbus_value)
1079
setattr(self, attrname, value)
1080
1081
return property(lambda self: getattr(self, attrname), setter)
1082
1083
1084
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1085
approvals_pending = notifychangeproperty(dbus.Boolean,
1086
"ApprovalPending",
1087
type_func = bool)
1088
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1089
last_enabled = notifychangeproperty(datetime_to_dbus,
1090
"LastEnabled")
1091
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1092
type_func = lambda checker:
1093
checker is not None)
1094
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1095
"LastCheckedOK")
1096
last_approval_request = notifychangeproperty(
1097
datetime_to_dbus, "LastApprovalRequest")
1098
approved_by_default = notifychangeproperty(dbus.Boolean,
1099
"ApprovedByDefault")
1100
approval_delay = notifychangeproperty(dbus.UInt64,
1101
"ApprovalDelay",
1102
type_func =
1103
timedelta_to_milliseconds)
1104
approval_duration = notifychangeproperty(
1105
dbus.UInt64, "ApprovalDuration",
1106
type_func = timedelta_to_milliseconds)
1107
host = notifychangeproperty(dbus.String, "Host")
1108
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1109
type_func =
1110
timedelta_to_milliseconds)
1111
extended_timeout = notifychangeproperty(
1112
dbus.UInt64, "ExtendedTimeout",
1113
type_func = timedelta_to_milliseconds)
1114
interval = notifychangeproperty(dbus.UInt64,
1115
"Interval",
1116
type_func =
1117
timedelta_to_milliseconds)
1118
checker_command = notifychangeproperty(dbus.String, "Checker")
1119
1120
del notifychangeproperty
524
1121
525
1122
def __del__(self, *args, **kwargs):
526
1123
try:
527
1124
self.remove_from_connection()
528
1125
except LookupError:
529
1126
pass
530
if hasattr(dbus.service.Object, u"__del__"):
531
dbus.service.Object.__del__(self, *args, **kwargs)
1127
if hasattr(DBusObjectWithProperties, "__del__"):
1128
DBusObjectWithProperties.__del__(self, *args, **kwargs)
532
1129
Client.__del__(self, *args, **kwargs)
533
1130
534
1131
def checker_callback(self, pid, condition, command,
535
1132
*args, **kwargs):
536
1133
self.checker_callback_tag = None
537
1134
self.checker = None
538
# Emit D-Bus signal
539
self.PropertyChanged(dbus.String(u"checker_running"),
540
dbus.Boolean(False, variant_level=1))
541
1135
if os.WIFEXITED(condition):
542
1136
exitstatus = os.WEXITSTATUS(condition)
543
1137
# Emit D-Bus signal
553
1147
return Client.checker_callback(self, pid, condition, command,
554
1148
*args, **kwargs)
555
1149
556
def checked_ok(self, *args, **kwargs):
557
r = Client.checked_ok(self, *args, **kwargs)
558
# Emit D-Bus signal
559
self.PropertyChanged(
560
dbus.String(u"last_checked_ok"),
561
(self._datetime_to_dbus(self.last_checked_ok,
562
variant_level=1)))
563
return r
564
565
1150
def start_checker(self, *args, **kwargs):
566
1151
old_checker = self.checker
567
1152
if self.checker is not None:
574
1159
and old_checker_pid != self.checker.pid):
575
1160
# Emit D-Bus signal
576
1161
self.CheckerStarted(self.current_checker_command)
577
self.PropertyChanged(
578
dbus.String(u"checker_running"),
579
dbus.Boolean(True, variant_level=1))
580
return r
581
582
def stop_checker(self, *args, **kwargs):
583
old_checker = getattr(self, u"checker", None)
584
r = Client.stop_checker(self, *args, **kwargs)
585
if (old_checker is not None
586
and getattr(self, u"checker", None) is None):
587
self.PropertyChanged(dbus.String(u"checker_running"),
588
dbus.Boolean(False, variant_level=1))
589
return r
590
591
## D-Bus methods & signals
592
_interface = u"se.bsnet.fukt.Mandos.Client"
593
594
# CheckedOK - method
595
@dbus.service.method(_interface)
596
def CheckedOK(self):
597
return self.checked_ok()
1162
return r
1163
1164
def _reset_approved(self):
1165
self.approved = None
1166
return False
1167
1168
def approve(self, value=True):
1169
self.send_changedstate()
1170
self.approved = value
1171
gobject.timeout_add(timedelta_to_milliseconds
1172
(self.approval_duration),
1173
self._reset_approved)
1174
1175
1176
## D-Bus methods, signals & properties
1177
_interface = "se.recompile.Mandos.Client"
1178
1179
## Signals
598
1180
599
1181
# CheckerCompleted - signal
600
@dbus.service.signal(_interface, signature=u"nxs")
1182
@dbus.service.signal(_interface, signature="nxs")
601
1183
def CheckerCompleted(self, exitcode, waitstatus, command):
602
1184
"D-Bus signal"
603
1185
pass
604
1186
605
1187
# CheckerStarted - signal
606
@dbus.service.signal(_interface, signature=u"s")
1188
@dbus.service.signal(_interface, signature="s")
607
1189
def CheckerStarted(self, command):
608
1190
"D-Bus signal"
609
1191
pass
610
1192
611
# GetAllProperties - method
612
@dbus.service.method(_interface, out_signature=u"a{sv}")
613
def GetAllProperties(self):
614
"D-Bus method"
615
return dbus.Dictionary({
616
dbus.String(u"name"):
617
dbus.String(self.name, variant_level=1),
618
dbus.String(u"fingerprint"):
619
dbus.String(self.fingerprint, variant_level=1),
620
dbus.String(u"host"):
621
dbus.String(self.host, variant_level=1),
622
dbus.String(u"created"):
623
self._datetime_to_dbus(self.created,
624
variant_level=1),
625
dbus.String(u"last_enabled"):
626
(self._datetime_to_dbus(self.last_enabled,
627
variant_level=1)
628
if self.last_enabled is not None
629
else dbus.Boolean(False, variant_level=1)),
630
dbus.String(u"enabled"):
631
dbus.Boolean(self.enabled, variant_level=1),
632
dbus.String(u"last_checked_ok"):
633
(self._datetime_to_dbus(self.last_checked_ok,
634
variant_level=1)
635
if self.last_checked_ok is not None
636
else dbus.Boolean (False, variant_level=1)),
637
dbus.String(u"timeout"):
638
dbus.UInt64(self.timeout_milliseconds(),
639
variant_level=1),
640
dbus.String(u"interval"):
641
dbus.UInt64(self.interval_milliseconds(),
642
variant_level=1),
643
dbus.String(u"checker"):
644
dbus.String(self.checker_command,
645
variant_level=1),
646
dbus.String(u"checker_running"):
647
dbus.Boolean(self.checker is not None,
648
variant_level=1),
649
dbus.String(u"object_path"):
650
dbus.ObjectPath(self.dbus_object_path,
651
variant_level=1)
652
}, signature=u"sv")
653
654
# IsStillValid - method
655
@dbus.service.method(_interface, out_signature=u"b")
656
def IsStillValid(self):
657
return self.still_valid()
658
659
1193
# PropertyChanged - signal
660
@dbus.service.signal(_interface, signature=u"sv")
1194
@dbus.service.signal(_interface, signature="sv")
661
1195
def PropertyChanged(self, property, value):
662
1196
"D-Bus signal"
663
1197
pass
664
1198
665
# ReceivedSecret - signal
1199
# GotSecret - signal
666
1200
@dbus.service.signal(_interface)
667
def ReceivedSecret(self):
668
"D-Bus signal"
1201
def GotSecret(self):
1202
"""D-Bus signal
1203
Is sent after a successful transfer of secret from the Mandos
1204
server to mandos-client
1205
"""
669
1206
pass
670
1207
671
1208
# Rejected - signal
672
@dbus.service.signal(_interface)
673
def Rejected(self):
674
"D-Bus signal"
675
pass
676
677
# SetChecker - method
678
@dbus.service.method(_interface, in_signature=u"s")
679
def SetChecker(self, checker):
680
"D-Bus setter method"
681
self.checker_command = checker
682
# Emit D-Bus signal
683
self.PropertyChanged(dbus.String(u"checker"),
684
dbus.String(self.checker_command,
685
variant_level=1))
686
687
# SetHost - method
688
@dbus.service.method(_interface, in_signature=u"s")
689
def SetHost(self, host):
690
"D-Bus setter method"
691
self.host = host
692
# Emit D-Bus signal
693
self.PropertyChanged(dbus.String(u"host"),
694
dbus.String(self.host, variant_level=1))
695
696
# SetInterval - method
697
@dbus.service.method(_interface, in_signature=u"t")
698
def SetInterval(self, milliseconds):
699
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
700
# Emit D-Bus signal
701
self.PropertyChanged(dbus.String(u"interval"),
702
(dbus.UInt64(self.interval_milliseconds(),
703
variant_level=1)))
704
705
# SetSecret - method
706
@dbus.service.method(_interface, in_signature=u"ay",
707
byte_arrays=True)
708
def SetSecret(self, secret):
709
"D-Bus setter method"
710
self.secret = str(secret)
711
712
# SetTimeout - method
713
@dbus.service.method(_interface, in_signature=u"t")
714
def SetTimeout(self, milliseconds):
715
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
716
# Emit D-Bus signal
717
self.PropertyChanged(dbus.String(u"timeout"),
718
(dbus.UInt64(self.timeout_milliseconds(),
719
variant_level=1)))
1209
@dbus.service.signal(_interface, signature="s")
1210
def Rejected(self, reason):
1211
"D-Bus signal"
1212
pass
1213
1214
# NeedApproval - signal
1215
@dbus.service.signal(_interface, signature="tb")
1216
def NeedApproval(self, timeout, default):
1217
"D-Bus signal"
1218
return self.need_approval()
1219
1220
# NeRwequest - signal
1221
@dbus.service.signal(_interface, signature="s")
1222
def NewRequest(self, ip):
1223
"""D-Bus signal
1224
Is sent after a client request a password.
1225
"""
1226
pass
1227
1228
## Methods
1229
1230
# Approve - method
1231
@dbus.service.method(_interface, in_signature="b")
1232
def Approve(self, value):
1233
self.approve(value)
1234
1235
# CheckedOK - method
1236
@dbus.service.method(_interface)
1237
def CheckedOK(self):
1238
self.checked_ok()
720
1239
721
1240
# Enable - method
722
1241
@dbus.service.method(_interface)
741
1260
def StopChecker(self):
742
1261
self.stop_checker()
743
1262
1263
## Properties
1264
1265
# ApprovalPending - property
1266
@dbus_service_property(_interface, signature="b", access="read")
1267
def ApprovalPending_dbus_property(self):
1268
return dbus.Boolean(bool(self.approvals_pending))
1269
1270
# ApprovedByDefault - property
1271
@dbus_service_property(_interface, signature="b",
1272
access="readwrite")
1273
def ApprovedByDefault_dbus_property(self, value=None):
1274
if value is None: # get
1275
return dbus.Boolean(self.approved_by_default)
1276
self.approved_by_default = bool(value)
1277
1278
# ApprovalDelay - property
1279
@dbus_service_property(_interface, signature="t",
1280
access="readwrite")
1281
def ApprovalDelay_dbus_property(self, value=None):
1282
if value is None: # get
1283
return dbus.UInt64(self.approval_delay_milliseconds())
1284
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1285
1286
# ApprovalDuration - property
1287
@dbus_service_property(_interface, signature="t",
1288
access="readwrite")
1289
def ApprovalDuration_dbus_property(self, value=None):
1290
if value is None: # get
1291
return dbus.UInt64(timedelta_to_milliseconds(
1292
self.approval_duration))
1293
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1294
1295
# Name - property
1296
@dbus_service_property(_interface, signature="s", access="read")
1297
def Name_dbus_property(self):
1298
return dbus.String(self.name)
1299
1300
# Fingerprint - property
1301
@dbus_service_property(_interface, signature="s", access="read")
1302
def Fingerprint_dbus_property(self):
1303
return dbus.String(self.fingerprint)
1304
1305
# Host - property
1306
@dbus_service_property(_interface, signature="s",
1307
access="readwrite")
1308
def Host_dbus_property(self, value=None):
1309
if value is None: # get
1310
return dbus.String(self.host)
1311
self.host = unicode(value)
1312
1313
# Created - property
1314
@dbus_service_property(_interface, signature="s", access="read")
1315
def Created_dbus_property(self):
1316
return datetime_to_dbus(self.created)
1317
1318
# LastEnabled - property
1319
@dbus_service_property(_interface, signature="s", access="read")
1320
def LastEnabled_dbus_property(self):
1321
return datetime_to_dbus(self.last_enabled)
1322
1323
# Enabled - property
1324
@dbus_service_property(_interface, signature="b",
1325
access="readwrite")
1326
def Enabled_dbus_property(self, value=None):
1327
if value is None: # get
1328
return dbus.Boolean(self.enabled)
1329
if value:
1330
self.enable()
1331
else:
1332
self.disable()
1333
1334
# LastCheckedOK - property
1335
@dbus_service_property(_interface, signature="s",
1336
access="readwrite")
1337
def LastCheckedOK_dbus_property(self, value=None):
1338
if value is not None:
1339
self.checked_ok()
1340
return
1341
return datetime_to_dbus(self.last_checked_ok)
1342
1343
# Expires - property
1344
@dbus_service_property(_interface, signature="s", access="read")
1345
def Expires_dbus_property(self):
1346
return datetime_to_dbus(self.expires)
1347
1348
# LastApprovalRequest - property
1349
@dbus_service_property(_interface, signature="s", access="read")
1350
def LastApprovalRequest_dbus_property(self):
1351
return datetime_to_dbus(self.last_approval_request)
1352
1353
# Timeout - property
1354
@dbus_service_property(_interface, signature="t",
1355
access="readwrite")
1356
def Timeout_dbus_property(self, value=None):
1357
if value is None: # get
1358
return dbus.UInt64(self.timeout_milliseconds())
1359
self.timeout = datetime.timedelta(0, 0, 0, value)
1360
if getattr(self, "disable_initiator_tag", None) is None:
1361
return
1362
# Reschedule timeout
1363
gobject.source_remove(self.disable_initiator_tag)
1364
self.disable_initiator_tag = None
1365
self.expires = None
1366
time_to_die = timedelta_to_milliseconds((self
1367
.last_checked_ok
1368
+ self.timeout)
1369
- datetime.datetime
1370
.utcnow())
1371
if time_to_die <= 0:
1372
# The timeout has passed
1373
self.disable()
1374
else:
1375
self.expires = (datetime.datetime.utcnow()
1376
+ datetime.timedelta(milliseconds =
1377
time_to_die))
1378
self.disable_initiator_tag = (gobject.timeout_add
1379
(time_to_die, self.disable))
1380
1381
# ExtendedTimeout - property
1382
@dbus_service_property(_interface, signature="t",
1383
access="readwrite")
1384
def ExtendedTimeout_dbus_property(self, value=None):
1385
if value is None: # get
1386
return dbus.UInt64(self.extended_timeout_milliseconds())
1387
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1388
1389
# Interval - property
1390
@dbus_service_property(_interface, signature="t",
1391
access="readwrite")
1392
def Interval_dbus_property(self, value=None):
1393
if value is None: # get
1394
return dbus.UInt64(self.interval_milliseconds())
1395
self.interval = datetime.timedelta(0, 0, 0, value)
1396
if getattr(self, "checker_initiator_tag", None) is None:
1397
return
1398
if self.enabled:
1399
# Reschedule checker run
1400
gobject.source_remove(self.checker_initiator_tag)
1401
self.checker_initiator_tag = (gobject.timeout_add
1402
(value, self.start_checker))
1403
self.start_checker() # Start one now, too
1404
1405
# Checker - property
1406
@dbus_service_property(_interface, signature="s",
1407
access="readwrite")
1408
def Checker_dbus_property(self, value=None):
1409
if value is None: # get
1410
return dbus.String(self.checker_command)
1411
self.checker_command = unicode(value)
1412
1413
# CheckerRunning - property
1414
@dbus_service_property(_interface, signature="b",
1415
access="readwrite")
1416
def CheckerRunning_dbus_property(self, value=None):
1417
if value is None: # get
1418
return dbus.Boolean(self.checker is not None)
1419
if value:
1420
self.start_checker()
1421
else:
1422
self.stop_checker()
1423
1424
# ObjectPath - property
1425
@dbus_service_property(_interface, signature="o", access="read")
1426
def ObjectPath_dbus_property(self):
1427
return self.dbus_object_path # is already a dbus.ObjectPath
1428
1429
# Secret = property
1430
@dbus_service_property(_interface, signature="ay",
1431
access="write", byte_arrays=True)
1432
def Secret_dbus_property(self, value):
1433
self.secret = str(value)
1434
744
1435
del _interface
745
1436
746
1437
1438
class ProxyClient(object):
1439
def __init__(self, child_pipe, fpr, address):
1440
self._pipe = child_pipe
1441
self._pipe.send(('init', fpr, address))
1442
if not self._pipe.recv():
1443
raise KeyError()
1444
1445
def __getattribute__(self, name):
1446
if name == '_pipe':
1447
return super(ProxyClient, self).__getattribute__(name)
1448
self._pipe.send(('getattr', name))
1449
data = self._pipe.recv()
1450
if data[0] == 'data':
1451
return data[1]
1452
if data[0] == 'function':
1453
def func(*args, **kwargs):
1454
self._pipe.send(('funcall', name, args, kwargs))
1455
return self._pipe.recv()[1]
1456
return func
1457
1458
def __setattr__(self, name, value):
1459
if name == '_pipe':
1460
return super(ProxyClient, self).__setattr__(name, value)
1461
self._pipe.send(('setattr', name, value))
1462
1463
1464
class ClientDBusTransitional(ClientDBus):
1465
__metaclass__ = AlternateDBusNamesMetaclass
1466
1467
747
1468
class ClientHandler(socketserver.BaseRequestHandler, object):
748
1469
"""A class to handle client connections.
749
1470
751
1472
Note: This will run in its own forked process."""
752
1473
753
1474
def handle(self):
754
logger.info(u"TCP connection from: %s",
755
unicode(self.client_address))
756
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
757
# Open IPC pipe to parent process
758
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1475
with contextlib.closing(self.server.child_pipe) as child_pipe:
1476
logger.info("TCP connection from: %s",
1477
unicode(self.client_address))
1478
logger.debug("Pipe FD: %d",
1479
self.server.child_pipe.fileno())
1480
759
1481
session = (gnutls.connection
760
1482
.ClientSession(self.request,
761
1483
gnutls.connection
762
1484
.X509Credentials()))
763
1485
764
line = self.request.makefile().readline()
765
logger.debug(u"Protocol version: %r", line)
766
try:
767
if int(line.strip().split()[0]) > 1:
768
raise RuntimeError
769
except (ValueError, IndexError, RuntimeError), error:
770
logger.error(u"Unknown protocol version: %s", error)
771
return
772
773
1486
# Note: gnutls.connection.X509Credentials is really a
774
1487
# generic GnuTLS certificate credentials object so long as
775
1488
# no X.509 keys are added to it. Therefore, we can use it
776
1489
# here despite using OpenPGP certificates.
777
1490
778
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
779
# u"+AES-256-CBC", u"+SHA1",
780
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
781
# u"+DHE-DSS"))
1491
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1492
# "+AES-256-CBC", "+SHA1",
1493
# "+COMP-NULL", "+CTYPE-OPENPGP",
1494
# "+DHE-DSS"))
782
1495
# Use a fallback default, since this MUST be set.
783
1496
priority = self.server.gnutls_priority
784
1497
if priority is None:
785
priority = u"NORMAL"
1498
priority = "NORMAL"
786
1499
(gnutls.library.functions
787
1500
.gnutls_priority_set_direct(session._c_object,
788
1501
priority, None))
789
1502
1503
# Start communication using the Mandos protocol
1504
# Get protocol number
1505
line = self.request.makefile().readline()
1506
logger.debug("Protocol version: %r", line)
1507
try:
1508
if int(line.strip().split()[0]) > 1:
1509
raise RuntimeError
1510
except (ValueError, IndexError, RuntimeError) as error:
1511
logger.error("Unknown protocol version: %s", error)
1512
return
1513
1514
# Start GnuTLS connection
790
1515
try:
791
1516
session.handshake()
792
except gnutls.errors.GNUTLSError, error:
793
logger.warning(u"Handshake failed: %s", error)
1517
except gnutls.errors.GNUTLSError as error:
1518
logger.warning("Handshake failed: %s", error)
794
1519
# Do not run session.bye() here: the session is not
795
1520
# established. Just abandon the request.
796
1521
return
797
logger.debug(u"Handshake succeeded")
1522
logger.debug("Handshake succeeded")
1523
1524
approval_required = False
798
1525
try:
799
fpr = self.fingerprint(self.peer_certificate(session))
800
except (TypeError, gnutls.errors.GNUTLSError), error:
801
logger.warning(u"Bad certificate: %s", error)
802
session.bye()
803
return
804
logger.debug(u"Fingerprint: %s", fpr)
1526
try:
1527
fpr = self.fingerprint(self.peer_certificate
1528
(session))
1529
except (TypeError,
1530
gnutls.errors.GNUTLSError) as error:
1531
logger.warning("Bad certificate: %s", error)
1532
return
1533
logger.debug("Fingerprint: %s", fpr)
1534
1535
try:
1536
client = ProxyClient(child_pipe, fpr,
1537
self.client_address)
1538
except KeyError:
1539
return
1540
1541
if self.server.use_dbus:
1542
# Emit D-Bus signal
1543
client.NewRequest(str(self.client_address))
1544
1545
if client.approval_delay:
1546
delay = client.approval_delay
1547
client.approvals_pending += 1
1548
approval_required = True
1549
1550
while True:
1551
if not client.enabled:
1552
logger.info("Client %s is disabled",
1553
client.name)
1554
if self.server.use_dbus:
1555
# Emit D-Bus signal
1556
client.Rejected("Disabled")
1557
return
1558
1559
if client.approved or not client.approval_delay:
1560
#We are approved or approval is disabled
1561
break
1562
elif client.approved is None:
1563
logger.info("Client %s needs approval",
1564
client.name)
1565
if self.server.use_dbus:
1566
# Emit D-Bus signal
1567
client.NeedApproval(
1568
client.approval_delay_milliseconds(),
1569
client.approved_by_default)
1570
else:
1571
logger.warning("Client %s was not approved",
1572
client.name)
1573
if self.server.use_dbus:
1574
# Emit D-Bus signal
1575
client.Rejected("Denied")
1576
return
1577
1578
#wait until timeout or approved
1579
time = datetime.datetime.now()
1580
client.changedstate.acquire()
1581
(client.changedstate.wait
1582
(float(client.timedelta_to_milliseconds(delay)
1583
/ 1000)))
1584
client.changedstate.release()
1585
time2 = datetime.datetime.now()
1586
if (time2 - time) >= delay:
1587
if not client.approved_by_default:
1588
logger.warning("Client %s timed out while"
1589
" waiting for approval",
1590
client.name)
1591
if self.server.use_dbus:
1592
# Emit D-Bus signal
1593
client.Rejected("Approval timed out")
1594
return
1595
else:
1596
break
1597
else:
1598
delay -= time2 - time
1599
1600
sent_size = 0
1601
while sent_size < len(client.secret):
1602
try:
1603
sent = session.send(client.secret[sent_size:])
1604
except gnutls.errors.GNUTLSError as error:
1605
logger.warning("gnutls send failed")
1606
return
1607
logger.debug("Sent: %d, remaining: %d",
1608
sent, len(client.secret)
1609
- (sent_size + sent))
1610
sent_size += sent
1611
1612
logger.info("Sending secret to %s", client.name)
1613
# bump the timeout using extended_timeout
1614
client.checked_ok(client.extended_timeout)
1615
if self.server.use_dbus:
1616
# Emit D-Bus signal
1617
client.GotSecret()
805
1618
806
for c in self.server.clients:
807
if c.fingerprint == fpr:
808
client = c
809
break
810
else:
811
ipc.write(u"NOTFOUND %s\n" % fpr)
812
session.bye()
813
return
814
# Have to check if client.still_valid(), since it is
815
# possible that the client timed out while establishing
816
# the GnuTLS session.
817
if not client.still_valid():
818
ipc.write(u"INVALID %s\n" % client.name)
819
session.bye()
820
return
821
ipc.write(u"SENDING %s\n" % client.name)
822
sent_size = 0
823
while sent_size < len(client.secret):
824
sent = session.send(client.secret[sent_size:])
825
logger.debug(u"Sent: %d, remaining: %d",
826
sent, len(client.secret)
827
- (sent_size + sent))
828
sent_size += sent
829
session.bye()
1619
finally:
1620
if approval_required:
1621
client.approvals_pending -= 1
1622
try:
1623
session.bye()
1624
except gnutls.errors.GNUTLSError as error:
1625
logger.warning("GnuTLS bye failed")
830
1626
831
1627
@staticmethod
832
1628
def peer_certificate(session):
842
1638
.gnutls_certificate_get_peers
843
1639
(session._c_object, ctypes.byref(list_size)))
844
1640
if not bool(cert_list) and list_size.value != 0:
845
raise gnutls.errors.GNUTLSError(u"error getting peer"
846
u" certificate")
1641
raise gnutls.errors.GNUTLSError("error getting peer"
1642
" certificate")
847
1643
if list_size.value == 0:
848
1644
return None
849
1645
cert = cert_list[0]
875
1671
if crtverify.value != 0:
876
1672
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
877
1673
raise (gnutls.errors.CertificateSecurityError
878
(u"Verify failed"))
1674
("Verify failed"))
879
1675
# New buffer for the fingerprint
880
1676
buf = ctypes.create_string_buffer(20)
881
1677
buf_len = ctypes.c_size_t()
888
1684
# Convert the buffer to a Python bytestring
889
1685
fpr = ctypes.string_at(buf, buf_len.value)
890
1686
# Convert the bytestring to hexadecimal notation
891
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1687
hex_fpr = binascii.hexlify(fpr).upper()
892
1688
return hex_fpr
893
1689
894
1690
895
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
896
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1691
class MultiprocessingMixIn(object):
1692
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1693
def sub_process_main(self, request, address):
1694
try:
1695
self.finish_request(request, address)
1696
except Exception:
1697
self.handle_error(request, address)
1698
self.close_request(request)
1699
1700
def process_request(self, request, address):
1701
"""Start a new process to process the request."""
1702
proc = multiprocessing.Process(target = self.sub_process_main,
1703
args = (request,
1704
address))
1705
proc.start()
1706
return proc
1707
1708
1709
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1710
""" adds a pipe to the MixIn """
897
1711
def process_request(self, request, client_address):
898
1712
"""Overrides and wraps the original process_request().
899
1713
900
This function creates a new pipe in self.pipe
1714
This function creates a new pipe in self.pipe
901
1715
"""
902
self.pipe = os.pipe()
903
super(ForkingMixInWithPipe,
904
self).process_request(request, client_address)
905
os.close(self.pipe[1]) # close write end
906
self.add_pipe(self.pipe[0])
907
def add_pipe(self, pipe):
1716
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1717
1718
proc = MultiprocessingMixIn.process_request(self, request,
1719
client_address)
1720
self.child_pipe.close()
1721
self.add_pipe(parent_pipe, proc)
1722
1723
def add_pipe(self, parent_pipe, proc):
908
1724
"""Dummy function; override as necessary"""
909
os.close(pipe)
910
911
912
class IPv6_TCPServer(ForkingMixInWithPipe,
1725
raise NotImplementedError
1726
1727
1728
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
913
1729
socketserver.TCPServer, object):
914
1730
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
915
1731
931
1747
bind to an address or port if they were not specified."""
932
1748
if self.interface is not None:
933
1749
if SO_BINDTODEVICE is None:
934
logger.error(u"SO_BINDTODEVICE does not exist;"
935
u" cannot bind to interface %s",
1750
logger.error("SO_BINDTODEVICE does not exist;"
1751
" cannot bind to interface %s",
936
1752
self.interface)
937
1753
else:
938
1754
try:
939
1755
self.socket.setsockopt(socket.SOL_SOCKET,
940
1756
SO_BINDTODEVICE,
941
1757
str(self.interface
942
+ u'\0'))
943
except socket.error, error:
1758
+ '\0'))
1759
except socket.error as error:
944
1760
if error[0] == errno.EPERM:
945
logger.error(u"No permission to"
946
u" bind to interface %s",
1761
logger.error("No permission to"
1762
" bind to interface %s",
947
1763
self.interface)
948
1764
elif error[0] == errno.ENOPROTOOPT:
949
logger.error(u"SO_BINDTODEVICE not available;"
950
u" cannot bind to interface %s",
1765
logger.error("SO_BINDTODEVICE not available;"
1766
" cannot bind to interface %s",
951
1767
self.interface)
952
1768
else:
953
1769
raise
955
1771
if self.server_address[0] or self.server_address[1]:
956
1772
if not self.server_address[0]:
957
1773
if self.address_family == socket.AF_INET6:
958
any_address = u"::" # in6addr_any
1774
any_address = "::" # in6addr_any
959
1775
else:
960
1776
any_address = socket.INADDR_ANY
961
1777
self.server_address = (any_address,
979
1795
clients: set of Client objects
980
1796
gnutls_priority GnuTLS priority string
981
1797
use_dbus: Boolean; to emit D-Bus signals or not
982
clients: set of Client objects
983
gnutls_priority GnuTLS priority string
984
use_dbus: Boolean; to emit D-Bus signals or not
985
1798
986
1799
Assumes a gobject.MainLoop event loop.
987
1800
"""
990
1803
gnutls_priority=None, use_dbus=True):
991
1804
self.enabled = False
992
1805
self.clients = clients
1806
if self.clients is None:
1807
self.clients = {}
993
1808
self.use_dbus = use_dbus
994
1809
self.gnutls_priority = gnutls_priority
995
1810
IPv6_TCPServer.__init__(self, server_address,
999
1814
def server_activate(self):
1000
1815
if self.enabled:
1001
1816
return socketserver.TCPServer.server_activate(self)
1817
1002
1818
def enable(self):
1003
1819
self.enabled = True
1004
def add_pipe(self, pipe):
1820
1821
def add_pipe(self, parent_pipe, proc):
1005
1822
# Call "handle_ipc" for both data and EOF events
1006
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1007
self.handle_ipc)
1008
def handle_ipc(self, source, condition, file_objects={}):
1823
gobject.io_add_watch(parent_pipe.fileno(),
1824
gobject.IO_IN | gobject.IO_HUP,
1825
functools.partial(self.handle_ipc,
1826
parent_pipe =
1827
parent_pipe,
1828
proc = proc))
1829
1830
def handle_ipc(self, source, condition, parent_pipe=None,
1831
proc = None, client_object=None):
1009
1832
condition_names = {
1010
gobject.IO_IN: u"IN", # There is data to read.
1011
gobject.IO_OUT: u"OUT", # Data can be written (without
1833
gobject.IO_IN: "IN", # There is data to read.
1834
gobject.IO_OUT: "OUT", # Data can be written (without
1012
1835
# blocking).
1013
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1014
gobject.IO_ERR: u"ERR", # Error condition.
1015
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1836
gobject.IO_PRI: "PRI", # There is urgent data to read.
1837
gobject.IO_ERR: "ERR", # Error condition.
1838
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1016
1839
# broken, usually for pipes and
1017
1840
# sockets).
1018
1841
}
1020
1843
for cond, name in
1021
1844
condition_names.iteritems()
1022
1845
if cond & condition)
1023
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1024
conditions_string)
1025
1026
# Turn the pipe file descriptor into a Python file object
1027
if source not in file_objects:
1028
file_objects[source] = os.fdopen(source, u"r", 1)
1029
1030
# Read a line from the file object
1031
cmdline = file_objects[source].readline()
1032
if not cmdline: # Empty line means end of file
1033
# close the IPC pipe
1034
file_objects[source].close()
1035
del file_objects[source]
1036
1037
# Stop calling this function
1038
return False
1039
1040
logger.debug(u"IPC command: %r", cmdline)
1041
1042
# Parse and act on command
1043
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1044
1045
if cmd == u"NOTFOUND":
1046
logger.warning(u"Client not found for fingerprint: %s",
1047
args)
1048
if self.use_dbus:
1049
# Emit D-Bus signal
1050
mandos_dbus_service.ClientNotFound(args)
1051
elif cmd == u"INVALID":
1052
for client in self.clients:
1053
if client.name == args:
1054
logger.warning(u"Client %s is invalid", args)
1055
if self.use_dbus:
1056
# Emit D-Bus signal
1057
client.Rejected()
1058
break
1059
else:
1060
logger.error(u"Unknown client %s is invalid", args)
1061
elif cmd == u"SENDING":
1062
for client in self.clients:
1063
if client.name == args:
1064
logger.info(u"Sending secret to %s", client.name)
1065
client.checked_ok()
1066
if self.use_dbus:
1067
# Emit D-Bus signal
1068
client.ReceivedSecret()
1069
break
1070
else:
1071
logger.error(u"Sending secret to unknown client %s",
1072
args)
1073
else:
1074
logger.error(u"Unknown IPC command: %r", cmdline)
1075
1076
# Keep calling this function
1846
# error, or the other end of multiprocessing.Pipe has closed
1847
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1848
# Wait for other process to exit
1849
proc.join()
1850
return False
1851
1852
# Read a request from the child
1853
request = parent_pipe.recv()
1854
command = request[0]
1855
1856
if command == 'init':
1857
fpr = request[1]
1858
address = request[2]
1859
1860
for c in self.clients.itervalues():
1861
if c.fingerprint == fpr:
1862
client = c
1863
break
1864
else:
1865
logger.info("Client not found for fingerprint: %s, ad"
1866
"dress: %s", fpr, address)
1867
if self.use_dbus:
1868
# Emit D-Bus signal
1869
mandos_dbus_service.ClientNotFound(fpr,
1870
address[0])
1871
parent_pipe.send(False)
1872
return False
1873
1874
gobject.io_add_watch(parent_pipe.fileno(),
1875
gobject.IO_IN | gobject.IO_HUP,
1876
functools.partial(self.handle_ipc,
1877
parent_pipe =
1878
parent_pipe,
1879
proc = proc,
1880
client_object =
1881
client))
1882
parent_pipe.send(True)
1883
# remove the old hook in favor of the new above hook on
1884
# same fileno
1885
return False
1886
if command == 'funcall':
1887
funcname = request[1]
1888
args = request[2]
1889
kwargs = request[3]
1890
1891
parent_pipe.send(('data', getattr(client_object,
1892
funcname)(*args,
1893
**kwargs)))
1894
1895
if command == 'getattr':
1896
attrname = request[1]
1897
if callable(client_object.__getattribute__(attrname)):
1898
parent_pipe.send(('function',))
1899
else:
1900
parent_pipe.send(('data', client_object
1901
.__getattribute__(attrname)))
1902
1903
if command == 'setattr':
1904
attrname = request[1]
1905
value = request[2]
1906
setattr(client_object, attrname, value)
1907
1077
1908
return True
1078
1909
1079
1910
1080
1911
def string_to_delta(interval):
1081
1912
"""Parse a string and return a datetime.timedelta
1082
1913
1083
>>> string_to_delta(u'7d')
1914
>>> string_to_delta('7d')
1084
1915
datetime.timedelta(7)
1085
>>> string_to_delta(u'60s')
1916
>>> string_to_delta('60s')
1086
1917
datetime.timedelta(0, 60)
1087
>>> string_to_delta(u'60m')
1918
>>> string_to_delta('60m')
1088
1919
datetime.timedelta(0, 3600)
1089
>>> string_to_delta(u'24h')
1920
>>> string_to_delta('24h')
1090
1921
datetime.timedelta(1)
1091
>>> string_to_delta(u'1w')
1922
>>> string_to_delta('1w')
1092
1923
datetime.timedelta(7)
1093
>>> string_to_delta(u'5m 30s')
1924
>>> string_to_delta('5m 30s')
1094
1925
datetime.timedelta(0, 330)
1095
1926
"""
1096
1927
timevalue = datetime.timedelta(0)
1098
1929
try:
1099
1930
suffix = unicode(s[-1])
1100
1931
value = int(s[:-1])
1101
if suffix == u"d":
1932
if suffix == "d":
1102
1933
delta = datetime.timedelta(value)
1103
elif suffix == u"s":
1934
elif suffix == "s":
1104
1935
delta = datetime.timedelta(0, value)
1105
elif suffix == u"m":
1936
elif suffix == "m":
1106
1937
delta = datetime.timedelta(0, 0, 0, 0, value)
1107
elif suffix == u"h":
1938
elif suffix == "h":
1108
1939
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1109
elif suffix == u"w":
1940
elif suffix == "w":
1110
1941
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1111
1942
else:
1112
raise ValueError
1113
except (ValueError, IndexError):
1114
raise ValueError
1943
raise ValueError("Unknown suffix %r" % suffix)
1944
except (ValueError, IndexError) as e:
1945
raise ValueError(*(e.args))
1115
1946
timevalue += delta
1116
1947
return timevalue
1117
1948
1118
1949
1119
def if_nametoindex(interface):
1120
"""Call the C function if_nametoindex(), or equivalent
1121
1122
Note: This function cannot accept a unicode string."""
1123
global if_nametoindex
1124
try:
1125
if_nametoindex = (ctypes.cdll.LoadLibrary
1126
(ctypes.util.find_library(u"c"))
1127
.if_nametoindex)
1128
except (OSError, AttributeError):
1129
logger.warning(u"Doing if_nametoindex the hard way")
1130
def if_nametoindex(interface):
1131
"Get an interface index the hard way, i.e. using fcntl()"
1132
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1133
with closing(socket.socket()) as s:
1134
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1135
struct.pack(str(u"16s16x"),
1136
interface))
1137
interface_index = struct.unpack(str(u"I"),
1138
ifreq[16:20])[0]
1139
return interface_index
1140
return if_nametoindex(interface)
1141
1142
1143
1950
def daemon(nochdir = False, noclose = False):
1144
1951
"""See daemon(3). Standard BSD Unix function.
1145
1952
1148
1955
sys.exit()
1149
1956
os.setsid()
1150
1957
if not nochdir:
1151
os.chdir(u"/")
1958
os.chdir("/")
1152
1959
if os.fork():
1153
1960
sys.exit()
1154
1961
if not noclose:
1156
1963
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1157
1964
if not stat.S_ISCHR(os.fstat(null).st_mode):
1158
1965
raise OSError(errno.ENODEV,
1159
u"/dev/null not a character device")
1966
"%s not a character device"
1967
% os.path.devnull)
1160
1968
os.dup2(null, sys.stdin.fileno())
1161
1969
os.dup2(null, sys.stdout.fileno())
1162
1970
os.dup2(null, sys.stderr.fileno())
1166
1974
1167
1975
def main():
1168
1976
1169
######################################################################
1977
##################################################################
1170
1978
# Parsing of options, both command line and config file
1171
1979
1172
parser = optparse.OptionParser(version = "%%prog %s" % version)
1173
parser.add_option("-i", u"--interface", type=u"string",
1174
metavar="IF", help=u"Bind to interface IF")
1175
parser.add_option("-a", u"--address", type=u"string",
1176
help=u"Address to listen for requests on")
1177
parser.add_option("-p", u"--port", type=u"int",
1178
help=u"Port number to receive requests on")
1179
parser.add_option("--check", action=u"store_true",
1180
help=u"Run self-test")
1181
parser.add_option("--debug", action=u"store_true",
1182
help=u"Debug mode; run in foreground and log to"
1183
u" terminal")
1184
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1185
u" priority string (see GnuTLS documentation)")
1186
parser.add_option("--servicename", type=u"string",
1187
metavar=u"NAME", help=u"Zeroconf service name")
1188
parser.add_option("--configdir", type=u"string",
1189
default=u"/etc/mandos", metavar=u"DIR",
1190
help=u"Directory to search for configuration"
1191
u" files")
1192
parser.add_option("--no-dbus", action=u"store_false",
1193
dest=u"use_dbus", help=u"Do not provide D-Bus"
1194
u" system bus interface")
1195
parser.add_option("--no-ipv6", action=u"store_false",
1196
dest=u"use_ipv6", help=u"Do not use IPv6")
1197
options = parser.parse_args()[0]
1980
parser = argparse.ArgumentParser()
1981
parser.add_argument("-v", "--version", action="version",
1982
version = "%%(prog)s %s" % version,
1983
help="show version number and exit")
1984
parser.add_argument("-i", "--interface", metavar="IF",
1985
help="Bind to interface IF")
1986
parser.add_argument("-a", "--address",
1987
help="Address to listen for requests on")
1988
parser.add_argument("-p", "--port", type=int,
1989
help="Port number to receive requests on")
1990
parser.add_argument("--check", action="store_true",
1991
help="Run self-test")
1992
parser.add_argument("--debug", action="store_true",
1993
help="Debug mode; run in foreground and log"
1994
" to terminal")
1995
parser.add_argument("--debuglevel", metavar="LEVEL",
1996
help="Debug level for stdout output")
1997
parser.add_argument("--priority", help="GnuTLS"
1998
" priority string (see GnuTLS documentation)")
1999
parser.add_argument("--servicename",
2000
metavar="NAME", help="Zeroconf service name")
2001
parser.add_argument("--configdir",
2002
default="/etc/mandos", metavar="DIR",
2003
help="Directory to search for configuration"
2004
" files")
2005
parser.add_argument("--no-dbus", action="store_false",
2006
dest="use_dbus", help="Do not provide D-Bus"
2007
" system bus interface")
2008
parser.add_argument("--no-ipv6", action="store_false",
2009
dest="use_ipv6", help="Do not use IPv6")
2010
parser.add_argument("--no-restore", action="store_false",
2011
dest="restore", help="Do not restore stored"
2012
" state")
2013
parser.add_argument("--statedir", metavar="DIR",
2014
help="Directory to save/restore state in")
2015
2016
options = parser.parse_args()
1198
2017
1199
2018
if options.check:
1200
2019
import doctest
1202
2021
sys.exit()
1203
2022
1204
2023
# Default values for config file for server-global settings
1205
server_defaults = { u"interface": u"",
1206
u"address": u"",
1207
u"port": u"",
1208
u"debug": u"False",
1209
u"priority":
1210
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1211
u"servicename": u"Mandos",
1212
u"use_dbus": u"True",
1213
u"use_ipv6": u"True",
2024
server_defaults = { "interface": "",
2025
"address": "",
2026
"port": "",
2027
"debug": "False",
2028
"priority":
2029
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2030
"servicename": "Mandos",
2031
"use_dbus": "True",
2032
"use_ipv6": "True",
2033
"debuglevel": "",
2034
"restore": "True",
2035
"statedir": "/var/lib/mandos"
1214
2036
}
1215
2037
1216
2038
# Parse config file for server-global settings
1217
2039
server_config = configparser.SafeConfigParser(server_defaults)
1218
2040
del server_defaults
1219
2041
server_config.read(os.path.join(options.configdir,
1220
u"mandos.conf"))
2042
"mandos.conf"))
1221
2043
# Convert the SafeConfigParser object to a dict
1222
2044
server_settings = server_config.defaults()
1223
2045
# Use the appropriate methods on the non-string config options
1224
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1225
server_settings[option] = server_config.getboolean(u"DEFAULT",
2046
for option in ("debug", "use_dbus", "use_ipv6"):
2047
server_settings[option] = server_config.getboolean("DEFAULT",
1226
2048
option)
1227
2049
if server_settings["port"]:
1228
server_settings["port"] = server_config.getint(u"DEFAULT",
1229
u"port")
2050
server_settings["port"] = server_config.getint("DEFAULT",
2051
"port")
1230
2052
del server_config
1231
2053
1232
2054
# Override the settings from the config file with command line
1233
2055
# options, if set.
1234
for option in (u"interface", u"address", u"port", u"debug",
1235
u"priority", u"servicename", u"configdir",
1236
u"use_dbus", u"use_ipv6"):
2056
for option in ("interface", "address", "port", "debug",
2057
"priority", "servicename", "configdir",
2058
"use_dbus", "use_ipv6", "debuglevel", "restore",
2059
"statedir"):
1237
2060
value = getattr(options, option)
1238
2061
if value is not None:
1239
2062
server_settings[option] = value
1247
2070
##################################################################
1248
2071
1249
2072
# For convenience
1250
debug = server_settings[u"debug"]
1251
use_dbus = server_settings[u"use_dbus"]
1252
use_ipv6 = server_settings[u"use_ipv6"]
1253
1254
if not debug:
1255
syslogger.setLevel(logging.WARNING)
1256
console.setLevel(logging.WARNING)
1257
1258
if server_settings[u"servicename"] != u"Mandos":
2073
debug = server_settings["debug"]
2074
debuglevel = server_settings["debuglevel"]
2075
use_dbus = server_settings["use_dbus"]
2076
use_ipv6 = server_settings["use_ipv6"]
2077
stored_state_path = os.path.join(server_settings["statedir"],
2078
stored_state_file)
2079
2080
if debug:
2081
initlogger(logging.DEBUG)
2082
else:
2083
if not debuglevel:
2084
initlogger()
2085
else:
2086
level = getattr(logging, debuglevel.upper())
2087
initlogger(level)
2088
2089
if server_settings["servicename"] != "Mandos":
1259
2090
syslogger.setFormatter(logging.Formatter
1260
(u'Mandos (%s) [%%(process)d]:'
1261
u' %%(levelname)s: %%(message)s'
1262
% server_settings[u"servicename"]))
2091
('Mandos (%s) [%%(process)d]:'
2092
' %%(levelname)s: %%(message)s'
2093
% server_settings["servicename"]))
1263
2094
1264
2095
# Parse config file with clients
1265
client_defaults = { u"timeout": u"1h",
1266
u"interval": u"5m",
1267
u"checker": u"fping -q -- %%(host)s",
1268
u"host": u"",
1269
}
1270
client_config = configparser.SafeConfigParser(client_defaults)
1271
client_config.read(os.path.join(server_settings[u"configdir"],
1272
u"clients.conf"))
2096
client_config = configparser.SafeConfigParser(Client.client_defaults)
2097
client_config.read(os.path.join(server_settings["configdir"],
2098
"clients.conf"))
1273
2099
1274
2100
global mandos_dbus_service
1275
2101
mandos_dbus_service = None
1276
2102
1277
clients = set()
1278
tcp_server = MandosServer((server_settings[u"address"],
1279
server_settings[u"port"]),
2103
tcp_server = MandosServer((server_settings["address"],
2104
server_settings["port"]),
1280
2105
ClientHandler,
1281
interface=server_settings[u"interface"],
2106
interface=(server_settings["interface"]
2107
or None),
1282
2108
use_ipv6=use_ipv6,
1283
clients=clients,
1284
2109
gnutls_priority=
1285
server_settings[u"priority"],
2110
server_settings["priority"],
1286
2111
use_dbus=use_dbus)
1287
pidfilename = u"/var/run/mandos.pid"
1288
try:
1289
pidfile = open(pidfilename, u"w")
1290
except IOError:
1291
logger.error(u"Could not open file %r", pidfilename)
2112
if not debug:
2113
pidfilename = "/var/run/mandos.pid"
2114
try:
2115
pidfile = open(pidfilename, "w")
2116
except IOError:
2117
logger.error("Could not open file %r", pidfilename)
1292
2118
1293
2119
try:
1294
uid = pwd.getpwnam(u"_mandos").pw_uid
1295
gid = pwd.getpwnam(u"_mandos").pw_gid
2120
uid = pwd.getpwnam("_mandos").pw_uid
2121
gid = pwd.getpwnam("_mandos").pw_gid
1296
2122
except KeyError:
1297
2123
try:
1298
uid = pwd.getpwnam(u"mandos").pw_uid
1299
gid = pwd.getpwnam(u"mandos").pw_gid
2124
uid = pwd.getpwnam("mandos").pw_uid
2125
gid = pwd.getpwnam("mandos").pw_gid
1300
2126
except KeyError:
1301
2127
try:
1302
uid = pwd.getpwnam(u"nobody").pw_uid
1303
gid = pwd.getpwnam(u"nobody").pw_gid
2128
uid = pwd.getpwnam("nobody").pw_uid
2129
gid = pwd.getpwnam("nobody").pw_gid
1304
2130
except KeyError:
1305
2131
uid = 65534
1306
2132
gid = 65534
1307
2133
try:
1308
2134
os.setgid(gid)
1309
2135
os.setuid(uid)
1310
except OSError, error:
2136
except OSError as error:
1311
2137
if error[0] != errno.EPERM:
1312
2138
raise error
1313
2139
1314
# Enable all possible GnuTLS debugging
1315
2140
if debug:
2141
# Enable all possible GnuTLS debugging
2142
1316
2143
# "Use a log level over 10 to enable all debugging options."
1317
2144
# - GnuTLS manual
1318
2145
gnutls.library.functions.gnutls_global_set_log_level(11)
1319
2146
1320
2147
@gnutls.library.types.gnutls_log_func
1321
2148
def debug_gnutls(level, string):
1322
logger.debug(u"GnuTLS: %s", string[:-1])
2149
logger.debug("GnuTLS: %s", string[:-1])
1323
2150
1324
2151
(gnutls.library.functions
1325
2152
.gnutls_global_set_log_function(debug_gnutls))
2153
2154
# Redirect stdin so all checkers get /dev/null
2155
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2156
os.dup2(null, sys.stdin.fileno())
2157
if null > 2:
2158
os.close(null)
2159
else:
2160
# No console logging
2161
logger.removeHandler(console)
2162
2163
# Need to fork before connecting to D-Bus
2164
if not debug:
2165
# Close all input and output, do double fork, etc.
2166
daemon()
1326
2167
1327
2168
global main_loop
1328
2169
# From the Avahi example code
1331
2172
bus = dbus.SystemBus()
1332
2173
# End of Avahi example code
1333
2174
if use_dbus:
1334
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2175
try:
2176
bus_name = dbus.service.BusName("se.recompile.Mandos",
2177
bus, do_not_queue=True)
2178
old_bus_name = (dbus.service.BusName
2179
("se.bsnet.fukt.Mandos", bus,
2180
do_not_queue=True))
2181
except dbus.exceptions.NameExistsException as e:
2182
logger.error(unicode(e) + ", disabling D-Bus")
2183
use_dbus = False
2184
server_settings["use_dbus"] = False
2185
tcp_server.use_dbus = False
1335
2186
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1336
service = AvahiService(name = server_settings[u"servicename"],
1337
servicetype = u"_mandos._tcp",
1338
protocol = protocol, bus = bus)
2187
service = AvahiServiceToSyslog(name =
2188
server_settings["servicename"],
2189
servicetype = "_mandos._tcp",
2190
protocol = protocol, bus = bus)
1339
2191
if server_settings["interface"]:
1340
2192
service.interface = (if_nametoindex
1341
(str(server_settings[u"interface"])))
2193
(str(server_settings["interface"])))
2194
2195
global multiprocessing_manager
2196
multiprocessing_manager = multiprocessing.Manager()
1342
2197
1343
2198
client_class = Client
1344
2199
if use_dbus:
1345
client_class = functools.partial(ClientDBus, bus = bus)
1346
clients.update(set(
1347
client_class(name = section,
1348
config= dict(client_config.items(section)))
1349
for section in client_config.sections()))
1350
if not clients:
1351
logger.warning(u"No clients defined")
1352
1353
if debug:
1354
# Redirect stdin so all checkers get /dev/null
1355
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1356
os.dup2(null, sys.stdin.fileno())
1357
if null > 2:
1358
os.close(null)
1359
else:
1360
# No console logging
1361
logger.removeHandler(console)
1362
# Close all input and output, do double fork, etc.
1363
daemon()
1364
1365
try:
1366
with closing(pidfile):
1367
pid = os.getpid()
1368
pidfile.write(str(pid) + "\n")
1369
del pidfile
1370
except IOError:
1371
logger.error(u"Could not write to file %r with PID %d",
1372
pidfilename, pid)
1373
except NameError:
1374
# "pidfile" was never created
1375
pass
1376
del pidfilename
1377
1378
def cleanup():
1379
"Cleanup function; run on exit"
1380
service.cleanup()
2200
client_class = functools.partial(ClientDBusTransitional,
2201
bus = bus)
2202
2203
client_settings = Client.config_parser(client_config)
2204
old_client_settings = {}
2205
clients_data = {}
2206
2207
# Get client data and settings from last running state.
2208
if server_settings["restore"]:
2209
try:
2210
with open(stored_state_path, "rb") as stored_state:
2211
clients_data, old_client_settings = (pickle.load
2212
(stored_state))
2213
os.remove(stored_state_path)
2214
except IOError as e:
2215
logger.warning("Could not load persistent state: {0}"
2216
.format(e))
2217
if e.errno != errno.ENOENT:
2218
raise
2219
2220
with PGPEngine() as pgp:
2221
for client_name, client in clients_data.iteritems():
2222
# Decide which value to use after restoring saved state.
2223
# We have three different values: Old config file,
2224
# new config file, and saved state.
2225
# New config value takes precedence if it differs from old
2226
# config value, otherwise use saved state.
2227
for name, value in client_settings[client_name].items():
2228
try:
2229
# For each value in new config, check if it
2230
# differs from the old config value (Except for
2231
# the "secret" attribute)
2232
if (name != "secret" and
2233
value != old_client_settings[client_name]
2234
[name]):
2235
client[name] = value
2236
except KeyError:
2237
pass
2238
2239
# Clients who has passed its expire date can still be
2240
# enabled if its last checker was successful. Clients
2241
# whose checker failed before we stored its state is
2242
# assumed to have failed all checkers during downtime.
2243
if client["enabled"]:
2244
if datetime.datetime.utcnow() >= client["expires"]:
2245
if not client["last_checked_ok"]:
2246
logger.warning(
2247
"disabling client {0} - Client never "
2248
"performed a successfull checker"
2249
.format(client["name"]))
2250
client["enabled"] = False
2251
elif client["last_checker_status"] != 0:
2252
logger.warning(
2253
"disabling client {0} - Client "
2254
"last checker failed with error code {1}"
2255
.format(client["name"],
2256
client["last_checker_status"]))
2257
client["enabled"] = False
2258
else:
2259
client["expires"] = (datetime.datetime
2260
.utcnow()
2261
+ client["timeout"])
2262
2263
try:
2264
client["secret"] = (
2265
pgp.decrypt(client["encrypted_secret"],
2266
client_settings[client_name]
2267
["secret"]))
2268
except PGPError:
2269
# If decryption fails, we use secret from new settings
2270
logger.debug("Failed to decrypt {0} old secret"
2271
.format(client_name))
2272
client["secret"] = (
2273
client_settings[client_name]["secret"])
2274
2275
2276
# Add/remove clients based on new changes made to config
2277
for client_name in set(old_client_settings) - set(client_settings):
2278
del clients_data[client_name]
2279
for client_name in set(client_settings) - set(old_client_settings):
2280
clients_data[client_name] = client_settings[client_name]
2281
2282
# Create clients all clients
2283
for client_name, client in clients_data.iteritems():
2284
tcp_server.clients[client_name] = client_class(
2285
name = client_name, settings = client)
2286
2287
if not tcp_server.clients:
2288
logger.warning("No clients defined")
1381
2289
1382
while clients:
1383
client = clients.pop()
1384
client.disable_hook = None
1385
client.disable()
1386
1387
atexit.register(cleanup)
1388
1389
2290
if not debug:
2291
try:
2292
with pidfile:
2293
pid = os.getpid()
2294
pidfile.write(str(pid) + "\n".encode("utf-8"))
2295
del pidfile
2296
except IOError:
2297
logger.error("Could not write to file %r with PID %d",
2298
pidfilename, pid)
2299
except NameError:
2300
# "pidfile" was never created
2301
pass
2302
del pidfilename
1390
2303
signal.signal(signal.SIGINT, signal.SIG_IGN)
2304
1391
2305
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1392
2306
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1393
2307
1395
2309
class MandosDBusService(dbus.service.Object):
1396
2310
"""A D-Bus proxy object"""
1397
2311
def __init__(self):
1398
dbus.service.Object.__init__(self, bus, u"/")
1399
_interface = u"se.bsnet.fukt.Mandos"
1400
1401
@dbus.service.signal(_interface, signature=u"oa{sv}")
1402
def ClientAdded(self, objpath, properties):
1403
"D-Bus signal"
1404
pass
1405
1406
@dbus.service.signal(_interface, signature=u"s")
1407
def ClientNotFound(self, fingerprint):
1408
"D-Bus signal"
1409
pass
1410
1411
@dbus.service.signal(_interface, signature=u"os")
2312
dbus.service.Object.__init__(self, bus, "/")
2313
_interface = "se.recompile.Mandos"
2314
2315
@dbus.service.signal(_interface, signature="o")
2316
def ClientAdded(self, objpath):
2317
"D-Bus signal"
2318
pass
2319
2320
@dbus.service.signal(_interface, signature="ss")
2321
def ClientNotFound(self, fingerprint, address):
2322
"D-Bus signal"
2323
pass
2324
2325
@dbus.service.signal(_interface, signature="os")
1412
2326
def ClientRemoved(self, objpath, name):
1413
2327
"D-Bus signal"
1414
2328
pass
1415
2329
1416
@dbus.service.method(_interface, out_signature=u"ao")
2330
@dbus.service.method(_interface, out_signature="ao")
1417
2331
def GetAllClients(self):
1418
2332
"D-Bus method"
1419
return dbus.Array(c.dbus_object_path for c in clients)
2333
return dbus.Array(c.dbus_object_path
2334
for c in
2335
tcp_server.clients.itervalues())
1420
2336
1421
2337
@dbus.service.method(_interface,
1422
out_signature=u"a{oa{sv}}")
2338
out_signature="a{oa{sv}}")
1423
2339
def GetAllClientsWithProperties(self):
1424
2340
"D-Bus method"
1425
2341
return dbus.Dictionary(
1426
((c.dbus_object_path, c.GetAllProperties())
1427
for c in clients),
1428
signature=u"oa{sv}")
2342
((c.dbus_object_path, c.GetAll(""))
2343
for c in tcp_server.clients.itervalues()),
2344
signature="oa{sv}")
1429
2345
1430
@dbus.service.method(_interface, in_signature=u"o")
2346
@dbus.service.method(_interface, in_signature="o")
1431
2347
def RemoveClient(self, object_path):
1432
2348
"D-Bus method"
1433
for c in clients:
2349
for c in tcp_server.clients.itervalues():
1434
2350
if c.dbus_object_path == object_path:
1435
clients.remove(c)
2351
del tcp_server.clients[c.name]
1436
2352
c.remove_from_connection()
1437
2353
# Don't signal anything except ClientRemoved
1438
c.disable(signal=False)
2354
c.disable(quiet=True)
1439
2355
# Emit D-Bus signal
1440
2356
self.ClientRemoved(object_path, c.name)
1441
2357
return
1442
raise KeyError
2358
raise KeyError(object_path)
1443
2359
1444
2360
del _interface
1445
2361
1446
mandos_dbus_service = MandosDBusService()
1447
1448
for client in clients:
2362
class MandosDBusServiceTransitional(MandosDBusService):
2363
__metaclass__ = AlternateDBusNamesMetaclass
2364
mandos_dbus_service = MandosDBusServiceTransitional()
2365
2366
def cleanup():
2367
"Cleanup function; run on exit"
2368
service.cleanup()
2369
2370
multiprocessing.active_children()
2371
if not (tcp_server.clients or client_settings):
2372
return
2373
2374
# Store client before exiting. Secrets are encrypted with key
2375
# based on what config file has. If config file is
2376
# removed/edited, old secret will thus be unrecovable.
2377
clients = {}
2378
with PGPEngine() as pgp:
2379
for client in tcp_server.clients.itervalues():
2380
key = client_settings[client.name]["secret"]
2381
client.encrypted_secret = pgp.encrypt(client.secret,
2382
key)
2383
client_dict = {}
2384
2385
# A list of attributes that can not be pickled
2386
# + secret.
2387
exclude = set(("bus", "changedstate", "secret",
2388
"checker"))
2389
for name, typ in (inspect.getmembers
2390
(dbus.service.Object)):
2391
exclude.add(name)
2392
2393
client_dict["encrypted_secret"] = (client
2394
.encrypted_secret)
2395
for attr in client.client_structure:
2396
if attr not in exclude:
2397
client_dict[attr] = getattr(client, attr)
2398
2399
clients[client.name] = client_dict
2400
del client_settings[client.name]["secret"]
2401
2402
try:
2403
with os.fdopen(os.open(stored_state_path,
2404
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2405
0600), "wb") as stored_state:
2406
pickle.dump((clients, client_settings), stored_state)
2407
except (IOError, OSError) as e:
2408
logger.warning("Could not save persistent state: {0}"
2409
.format(e))
2410
if e.errno not in (errno.ENOENT, errno.EACCES):
2411
raise
2412
2413
# Delete all clients, and settings from config
2414
while tcp_server.clients:
2415
name, client = tcp_server.clients.popitem()
2416
if use_dbus:
2417
client.remove_from_connection()
2418
# Don't signal anything except ClientRemoved
2419
client.disable(quiet=True)
2420
if use_dbus:
2421
# Emit D-Bus signal
2422
mandos_dbus_service.ClientRemoved(client
2423
.dbus_object_path,
2424
client.name)
2425
client_settings.clear()
2426
2427
atexit.register(cleanup)
2428
2429
for client in tcp_server.clients.itervalues():
1449
2430
if use_dbus:
1450
2431
# Emit D-Bus signal
1451
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1452
client.GetAllProperties())
1453
client.enable()
2432
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2433
# Need to initiate checking of clients
2434
if client.enabled:
2435
client.init_checker()
1454
2436
1455
2437
tcp_server.enable()
1456
2438
tcp_server.server_activate()
1458
2440
# Find out what port we got
1459
2441
service.port = tcp_server.socket.getsockname()[1]
1460
2442
if use_ipv6:
1461
logger.info(u"Now listening on address %r, port %d,"
2443
logger.info("Now listening on address %r, port %d,"
1462
2444
" flowinfo %d, scope_id %d"
1463
2445
% tcp_server.socket.getsockname())
1464
2446
else: # IPv4
1465
logger.info(u"Now listening on address %r, port %d"
2447
logger.info("Now listening on address %r, port %d"
1466
2448
% tcp_server.socket.getsockname())
1467
2449
1468
2450
#service.interface = tcp_server.socket.getsockname()[3]
1471
2453
# From the Avahi example code
1472
2454
try:
1473
2455
service.activate()
1474
except dbus.exceptions.DBusException, error:
1475
logger.critical(u"DBusException: %s", error)
2456
except dbus.exceptions.DBusException as error:
2457
logger.critical("DBusException: %s", error)
2458
cleanup()
1476
2459
sys.exit(1)
1477
2460
# End of Avahi example code
1478
2461
1481
2464
(tcp_server.handle_request
1482
2465
(*args[2:], **kwargs) or True))
1483
2466
1484
logger.debug(u"Starting main loop")
2467
logger.debug("Starting main loop")
1485
2468
main_loop.run()
1486
except AvahiError, error:
1487
logger.critical(u"AvahiError: %s", error)
2469
except AvahiError as error:
2470
logger.critical("AvahiError: %s", error)
2471
cleanup()
1488
2472
sys.exit(1)
1489
2473
except KeyboardInterrupt:
1490
2474
if debug:
1491
print >> sys.stderr
1492
logger.debug(u"Server received KeyboardInterrupt")
1493
logger.debug(u"Server exiting")
2475
print("", file=sys.stderr)
2476
logger.debug("Server received KeyboardInterrupt")
2477
logger.debug("Server exiting")
2478
# Must run before the D-Bus bus name gets deregistered
2479
cleanup()
1494
2480
1495
2481
if __name__ == '__main__':
1496
2482
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0