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- Committer: teddy at recompile
- Date: 2011-12-27 14:15:40 UTC
- Revision ID: teddy@recompile.se-20111227141540-ajrabf33q59jfa7t
Reorder TODO entries
- 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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17
# 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
55
56
import logging
56
57
import logging.handlers
57
58
import pwd
58
from contextlib import closing
59
import contextlib
59
60
import struct
60
61
import fcntl
61
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
67
import tempfile
62
68
63
69
import dbus
64
70
import dbus.service
69
75
import ctypes.util
70
76
import xml.dom.minidom
71
77
import inspect
78
import GnuPGInterface
72
79
73
80
try:
74
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
85
except ImportError:
79
86
SO_BINDTODEVICE = None
80
87
81
82
version = "1.0.13"
83
84
logger = logging.Logger(u'mandos')
88
version = "1.4.1"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
85
92
syslogger = (logging.handlers.SysLogHandler
86
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
87
address = "/dev/log"))
88
syslogger.setFormatter(logging.Formatter
89
(u'Mandos [%(process)d]: %(levelname)s:'
90
u' %(message)s'))
91
logger.addHandler(syslogger)
92
93
console = logging.StreamHandler()
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
u' %(levelname)s:'
96
u' %(message)s'))
97
logger.addHandler(console)
94
address = str("/dev/log")))
95
96
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
100
except (OSError, AttributeError):
101
def if_nametoindex(interface):
102
"Get an interface index the hard way, i.e. using fcntl()"
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
with contextlib.closing(socket.socket()) as s:
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
110
return interface_index
111
112
113
def initlogger(debug, level=logging.WARNING):
114
"""init logger and add loglevel"""
115
116
syslogger.setFormatter(logging.Formatter
117
('Mandos [%(process)d]: %(levelname)s:'
118
' %(message)s'))
119
logger.addHandler(syslogger)
120
121
if debug:
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
124
' [%(process)d]:'
125
' %(levelname)s:'
126
' %(message)s'))
127
logger.addHandler(console)
128
logger.setLevel(level)
129
130
131
class PGPError(Exception):
132
"""Exception if encryption/decryption fails"""
133
pass
134
135
136
class PGPEngine(object):
137
"""A simple class for OpenPGP symmetric encryption & decryption"""
138
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet'])
146
147
def __enter__(self):
148
return self
149
150
def __exit__ (self, exc_type, exc_value, traceback):
151
self._cleanup()
152
return False
153
154
def __del__(self):
155
self._cleanup()
156
157
def _cleanup(self):
158
if self.tempdir is not None:
159
# Delete contents of tempdir
160
for root, dirs, files in os.walk(self.tempdir,
161
topdown = False):
162
for filename in files:
163
os.remove(os.path.join(root, filename))
164
for dirname in dirs:
165
os.rmdir(os.path.join(root, dirname))
166
# Remove tempdir
167
os.rmdir(self.tempdir)
168
self.tempdir = None
169
170
def password_encode(self, password):
171
# Passphrase can not be empty and can not contain newlines or
172
# NUL bytes. So we prefix it and hex encode it.
173
return b"mandos" + binascii.hexlify(password)
174
175
def encrypt(self, data, password):
176
self.gnupg.passphrase = self.password_encode(password)
177
with open(os.devnull) as devnull:
178
try:
179
proc = self.gnupg.run(['--symmetric'],
180
create_fhs=['stdin', 'stdout'],
181
attach_fhs={'stderr': devnull})
182
with contextlib.closing(proc.handles['stdin']) as f:
183
f.write(data)
184
with contextlib.closing(proc.handles['stdout']) as f:
185
ciphertext = f.read()
186
proc.wait()
187
except IOError as e:
188
raise PGPError(e)
189
self.gnupg.passphrase = None
190
return ciphertext
191
192
def decrypt(self, data, password):
193
self.gnupg.passphrase = self.password_encode(password)
194
with open(os.devnull) as devnull:
195
try:
196
proc = self.gnupg.run(['--decrypt'],
197
create_fhs=['stdin', 'stdout'],
198
attach_fhs={'stderr': devnull})
199
with contextlib.closing(proc.handles['stdin'] ) as f:
200
f.write(data)
201
with contextlib.closing(proc.handles['stdout']) as f:
202
decrypted_plaintext = f.read()
203
proc.wait()
204
except IOError as e:
205
raise PGPError(e)
206
self.gnupg.passphrase = None
207
return decrypted_plaintext
208
209
98
210
99
211
class AvahiError(Exception):
100
212
def __init__(self, value, *args, **kwargs):
116
228
Attributes:
117
229
interface: integer; avahi.IF_UNSPEC or an interface index.
118
230
Used to optionally bind to the specified interface.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
231
name: string; Example: 'Mandos'
232
type: string; Example: '_mandos._tcp'.
121
233
See <http://www.dns-sd.org/ServiceTypes.html>
122
234
port: integer; what port to announce
123
235
TXT: list of strings; TXT record for the service
132
244
"""
133
245
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
134
246
servicetype = None, port = None, TXT = None,
135
domain = u"", host = u"", max_renames = 32768,
247
domain = "", host = "", max_renames = 32768,
136
248
protocol = avahi.PROTO_UNSPEC, bus = None):
137
249
self.interface = interface
138
250
self.name = name
147
259
self.group = None # our entry group
148
260
self.server = None
149
261
self.bus = bus
262
self.entry_group_state_changed_match = None
150
263
def rename(self):
151
264
"""Derived from the Avahi example code"""
152
265
if self.rename_count >= self.max_renames:
153
logger.critical(u"No suitable Zeroconf service name found"
154
u" after %i retries, exiting.",
266
logger.critical("No suitable Zeroconf service name found"
267
" after %i retries, exiting.",
155
268
self.rename_count)
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
158
logger.info(u"Changing Zeroconf service name to %r ...",
159
unicode(self.name))
160
syslogger.setFormatter(logging.Formatter
161
(u'Mandos (%s) [%%(process)d]:'
162
u' %%(levelname)s: %%(message)s'
163
% self.name))
269
raise AvahiServiceError("Too many renames")
270
self.name = unicode(self.server
271
.GetAlternativeServiceName(self.name))
272
logger.info("Changing Zeroconf service name to %r ...",
273
self.name)
164
274
self.remove()
165
self.add()
275
try:
276
self.add()
277
except dbus.exceptions.DBusException as error:
278
logger.critical("DBusException: %s", error)
279
self.cleanup()
280
os._exit(1)
166
281
self.rename_count += 1
167
282
def remove(self):
168
283
"""Derived from the Avahi example code"""
284
if self.entry_group_state_changed_match is not None:
285
self.entry_group_state_changed_match.remove()
286
self.entry_group_state_changed_match = None
169
287
if self.group is not None:
170
288
self.group.Reset()
171
289
def add(self):
172
290
"""Derived from the Avahi example code"""
291
self.remove()
173
292
if self.group is None:
174
293
self.group = dbus.Interface(
175
294
self.bus.get_object(avahi.DBUS_NAME,
176
295
self.server.EntryGroupNew()),
177
296
avahi.DBUS_INTERFACE_ENTRY_GROUP)
178
self.group.connect_to_signal('StateChanged',
179
self
180
.entry_group_state_changed)
181
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
297
self.entry_group_state_changed_match = (
298
self.group.connect_to_signal(
299
'StateChanged', self.entry_group_state_changed))
300
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
182
301
self.name, self.type)
183
302
self.group.AddService(
184
303
self.interface,
191
310
self.group.Commit()
192
311
def entry_group_state_changed(self, state, error):
193
312
"""Derived from the Avahi example code"""
194
logger.debug(u"Avahi state change: %i", state)
313
logger.debug("Avahi entry group state change: %i", state)
195
314
196
315
if state == avahi.ENTRY_GROUP_ESTABLISHED:
197
logger.debug(u"Zeroconf service established.")
316
logger.debug("Zeroconf service established.")
198
317
elif state == avahi.ENTRY_GROUP_COLLISION:
199
logger.warning(u"Zeroconf service name collision.")
318
logger.info("Zeroconf service name collision.")
200
319
self.rename()
201
320
elif state == avahi.ENTRY_GROUP_FAILURE:
202
logger.critical(u"Avahi: Error in group state changed %s",
321
logger.critical("Avahi: Error in group state changed %s",
203
322
unicode(error))
204
raise AvahiGroupError(u"State changed: %s"
323
raise AvahiGroupError("State changed: %s"
205
324
% unicode(error))
206
325
def cleanup(self):
207
326
"""Derived from the Avahi example code"""
208
327
if self.group is not None:
209
self.group.Free()
328
try:
329
self.group.Free()
330
except (dbus.exceptions.UnknownMethodException,
331
dbus.exceptions.DBusException):
332
pass
210
333
self.group = None
211
def server_state_changed(self, state):
334
self.remove()
335
def server_state_changed(self, state, error=None):
212
336
"""Derived from the Avahi example code"""
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
215
self.remove()
337
logger.debug("Avahi server state change: %i", state)
338
bad_states = { avahi.SERVER_INVALID:
339
"Zeroconf server invalid",
340
avahi.SERVER_REGISTERING: None,
341
avahi.SERVER_COLLISION:
342
"Zeroconf server name collision",
343
avahi.SERVER_FAILURE:
344
"Zeroconf server failure" }
345
if state in bad_states:
346
if bad_states[state] is not None:
347
if error is None:
348
logger.error(bad_states[state])
349
else:
350
logger.error(bad_states[state] + ": %r", error)
351
self.cleanup()
216
352
elif state == avahi.SERVER_RUNNING:
217
353
self.add()
354
else:
355
if error is None:
356
logger.debug("Unknown state: %r", state)
357
else:
358
logger.debug("Unknown state: %r: %r", state, error)
218
359
def activate(self):
219
360
"""Derived from the Avahi example code"""
220
361
if self.server is None:
221
362
self.server = dbus.Interface(
222
363
self.bus.get_object(avahi.DBUS_NAME,
223
avahi.DBUS_PATH_SERVER),
364
avahi.DBUS_PATH_SERVER,
365
follow_name_owner_changes=True),
224
366
avahi.DBUS_INTERFACE_SERVER)
225
self.server.connect_to_signal(u"StateChanged",
367
self.server.connect_to_signal("StateChanged",
226
368
self.server_state_changed)
227
369
self.server_state_changed(self.server.GetState())
228
370
371
class AvahiServiceToSyslog(AvahiService):
372
def rename(self):
373
"""Add the new name to the syslog messages"""
374
ret = AvahiService.rename(self)
375
syslogger.setFormatter(logging.Formatter
376
('Mandos (%s) [%%(process)d]:'
377
' %%(levelname)s: %%(message)s'
378
% self.name))
379
return ret
229
380
381
def timedelta_to_milliseconds(td):
382
"Convert a datetime.timedelta() to milliseconds"
383
return ((td.days * 24 * 60 * 60 * 1000)
384
+ (td.seconds * 1000)
385
+ (td.microseconds // 1000))
386
230
387
class Client(object):
231
388
"""A representation of a client host served by this server.
232
389
233
390
Attributes:
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
236
fingerprint: string (40 or 32 hexadecimal digits); used to
237
uniquely identify the client
238
secret: bytestring; sent verbatim (over TLS) to client
239
host: string; available for use by the checker command
240
created: datetime.datetime(); (UTC) object creation
241
last_enabled: datetime.datetime(); (UTC)
242
enabled: bool()
243
last_checked_ok: datetime.datetime(); (UTC) or None
244
timeout: datetime.timedelta(); How long from last_checked_ok
245
until this client is invalid
246
interval: datetime.timedelta(); How often to start a new checker
247
disable_hook: If set, called by disable() as disable_hook(self)
391
approved: bool(); 'None' if not yet approved/disapproved
392
approval_delay: datetime.timedelta(); Time to wait for approval
393
approval_duration: datetime.timedelta(); Duration of one approval
248
394
checker: subprocess.Popen(); a running checker process used
249
395
to see if the client lives.
250
396
'None' if no process is running.
251
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
253
checker_callback_tag: - '' -
254
checker_command: string; External command which is run to check if
255
client lives. %() expansions are done at
397
checker_callback_tag: a gobject event source tag, or None
398
checker_command: string; External command which is run to check
399
if client lives. %() expansions are done at
256
400
runtime with vars(self) as dict, so that for
257
401
instance %(name)s can be used in the command.
402
checker_initiator_tag: a gobject event source tag, or None
403
created: datetime.datetime(); (UTC) object creation
404
client_structure: Object describing what attributes a client has
405
and is used for storing the client at exit
258
406
current_checker_command: string; current running checker_command
407
disable_initiator_tag: a gobject event source tag, or None
408
enabled: bool()
409
fingerprint: string (40 or 32 hexadecimal digits); used to
410
uniquely identify the client
411
host: string; available for use by the checker command
412
interval: datetime.timedelta(); How often to start a new checker
413
last_approval_request: datetime.datetime(); (UTC) or None
414
last_checked_ok: datetime.datetime(); (UTC) or None
415
last_checker_status: integer between 0 and 255 reflecting exit
416
status of last checker. -1 reflects crashed
417
checker, or None.
418
last_enabled: datetime.datetime(); (UTC) or None
419
name: string; from the config file, used in log messages and
420
D-Bus identifiers
421
secret: bytestring; sent verbatim (over TLS) to client
422
timeout: datetime.timedelta(); How long from last_checked_ok
423
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
425
runtime_expansions: Allowed attributes for runtime expansion.
426
expires: datetime.datetime(); time (UTC) when a client will be
427
disabled, or None
259
428
"""
260
429
261
@staticmethod
262
def _timedelta_to_milliseconds(td):
263
"Convert a datetime.timedelta() to milliseconds"
264
return ((td.days * 24 * 60 * 60 * 1000)
265
+ (td.seconds * 1000)
266
+ (td.microseconds // 1000))
430
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
433
"last_enabled", "name", "timeout")
434
client_defaults = { "timeout": "5m",
435
"extended_timeout": "15m",
436
"interval": "2m",
437
"checker": "fping -q -- %%(host)s",
438
"host": "",
439
"approval_delay": "0s",
440
"approval_duration": "1s",
441
"approved_by_default": "True",
442
"enabled": "True",
443
}
267
444
268
445
def timeout_milliseconds(self):
269
446
"Return the 'timeout' attribute in milliseconds"
270
return self._timedelta_to_milliseconds(self.timeout)
447
return timedelta_to_milliseconds(self.timeout)
448
449
def extended_timeout_milliseconds(self):
450
"Return the 'extended_timeout' attribute in milliseconds"
451
return timedelta_to_milliseconds(self.extended_timeout)
271
452
272
453
def interval_milliseconds(self):
273
454
"Return the 'interval' attribute in milliseconds"
274
return self._timedelta_to_milliseconds(self.interval)
455
return timedelta_to_milliseconds(self.interval)
275
456
276
def __init__(self, name = None, disable_hook=None, config=None):
457
def approval_delay_milliseconds(self):
458
return timedelta_to_milliseconds(self.approval_delay)
459
460
@staticmethod
461
def config_parser(config):
462
""" Construct a new dict of client settings of this form:
463
{ client_name: {setting_name: value, ...}, ...}
464
with exceptions for any special settings as defined above"""
465
settings = {}
466
for client_name in config.sections():
467
section = dict(config.items(client_name))
468
client = settings[client_name] = {}
469
470
client["host"] = section["host"]
471
# Reformat values from string types to Python types
472
client["approved_by_default"] = config.getboolean(
473
client_name, "approved_by_default")
474
client["enabled"] = config.getboolean(client_name, "enabled")
475
476
client["fingerprint"] = (section["fingerprint"].upper()
477
.replace(" ", ""))
478
if "secret" in section:
479
client["secret"] = section["secret"].decode("base64")
480
elif "secfile" in section:
481
with open(os.path.expanduser(os.path.expandvars
482
(section["secfile"])),
483
"rb") as secfile:
484
client["secret"] = secfile.read()
485
else:
486
raise TypeError("No secret or secfile for section %s"
487
% section)
488
client["timeout"] = string_to_delta(section["timeout"])
489
client["extended_timeout"] = string_to_delta(
490
section["extended_timeout"])
491
client["interval"] = string_to_delta(section["interval"])
492
client["approval_delay"] = string_to_delta(
493
section["approval_delay"])
494
client["approval_duration"] = string_to_delta(
495
section["approval_duration"])
496
client["checker_command"] = section["checker"]
497
client["last_approval_request"] = None
498
client["last_checked_ok"] = None
499
client["last_checker_status"] = None
500
if client["enabled"]:
501
client["last_enabled"] = datetime.datetime.utcnow()
502
client["expires"] = (datetime.datetime.utcnow()
503
+ client["timeout"])
504
else:
505
client["last_enabled"] = None
506
client["expires"] = None
507
508
return settings
509
510
511
def __init__(self, settings, name = None):
277
512
"""Note: the 'checker' key in 'config' sets the
278
513
'checker_command' attribute and *not* the 'checker'
279
514
attribute."""
280
515
self.name = name
281
if config is None:
282
config = {}
283
logger.debug(u"Creating client %r", self.name)
516
# adding all client settings
517
for setting, value in settings.iteritems():
518
setattr(self, setting, value)
519
520
logger.debug("Creating client %r", self.name)
284
521
# Uppercase and remove spaces from fingerprint for later
285
522
# comparison purposes with return value from the fingerprint()
286
523
# function
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
289
logger.debug(u" Fingerprint: %s", self.fingerprint)
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
294
(os.path.expandvars
295
(config[u"secfile"])),
296
"rb")) as secfile:
297
self.secret = secfile.read()
298
else:
299
raise TypeError(u"No secret or secfile for client %s"
300
% self.name)
301
self.host = config.get(u"host", u"")
302
self.created = datetime.datetime.utcnow()
303
self.enabled = False
304
self.last_enabled = None
305
self.last_checked_ok = None
306
self.timeout = string_to_delta(config[u"timeout"])
307
self.interval = string_to_delta(config[u"interval"])
308
self.disable_hook = disable_hook
524
logger.debug(" Fingerprint: %s", self.fingerprint)
525
self.created = settings.get("created", datetime.datetime.utcnow())
526
527
# attributes specific for this server instance
309
528
self.checker = None
310
529
self.checker_initiator_tag = None
311
530
self.disable_initiator_tag = None
312
531
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
314
532
self.current_checker_command = None
315
self.last_connect = None
533
self.approved = None
534
self.approvals_pending = 0
535
self.changedstate = (multiprocessing_manager
536
.Condition(multiprocessing_manager
537
.Lock()))
538
self.client_structure = [attr for attr in
539
self.__dict__.iterkeys()
540
if not attr.startswith("_")]
541
self.client_structure.append("client_structure")
542
543
for name, t in inspect.getmembers(type(self),
544
lambda obj:
545
isinstance(obj,
546
property)):
547
if not name.startswith("_"):
548
self.client_structure.append(name)
549
550
# Send notice to process children that client state has changed
551
def send_changedstate(self):
552
with self.changedstate:
553
self.changedstate.notify_all()
316
554
317
555
def enable(self):
318
556
"""Start this client's checker and timeout hooks"""
319
if getattr(self, u"enabled", False):
557
if getattr(self, "enabled", False):
320
558
# Already enabled
321
559
return
560
self.send_changedstate()
561
self.expires = datetime.datetime.utcnow() + self.timeout
562
self.enabled = True
322
563
self.last_enabled = datetime.datetime.utcnow()
564
self.init_checker()
565
566
def disable(self, quiet=True):
567
"""Disable this client."""
568
if not getattr(self, "enabled", False):
569
return False
570
if not quiet:
571
self.send_changedstate()
572
if not quiet:
573
logger.info("Disabling client %s", self.name)
574
if getattr(self, "disable_initiator_tag", False):
575
gobject.source_remove(self.disable_initiator_tag)
576
self.disable_initiator_tag = None
577
self.expires = None
578
if getattr(self, "checker_initiator_tag", False):
579
gobject.source_remove(self.checker_initiator_tag)
580
self.checker_initiator_tag = None
581
self.stop_checker()
582
self.enabled = False
583
# Do not run this again if called by a gobject.timeout_add
584
return False
585
586
def __del__(self):
587
self.disable()
588
589
def init_checker(self):
323
590
# Schedule a new checker to be started an 'interval' from now,
324
591
# and every interval from then on.
325
592
self.checker_initiator_tag = (gobject.timeout_add
326
593
(self.interval_milliseconds(),
327
594
self.start_checker))
328
# Also start a new checker *right now*.
329
self.start_checker()
330
595
# Schedule a disable() when 'timeout' has passed
331
596
self.disable_initiator_tag = (gobject.timeout_add
332
597
(self.timeout_milliseconds(),
333
598
self.disable))
334
self.enabled = True
335
336
def disable(self):
337
"""Disable this client."""
338
if not getattr(self, "enabled", False):
339
return False
340
logger.info(u"Disabling client %s", self.name)
341
if getattr(self, u"disable_initiator_tag", False):
342
gobject.source_remove(self.disable_initiator_tag)
343
self.disable_initiator_tag = None
344
if getattr(self, u"checker_initiator_tag", False):
345
gobject.source_remove(self.checker_initiator_tag)
346
self.checker_initiator_tag = None
347
self.stop_checker()
348
if self.disable_hook:
349
self.disable_hook(self)
350
self.enabled = False
351
# Do not run this again if called by a gobject.timeout_add
352
return False
353
354
def __del__(self):
355
self.disable_hook = None
356
self.disable()
599
# Also start a new checker *right now*.
600
self.start_checker()
357
601
358
602
def checker_callback(self, pid, condition, command):
359
603
"""The checker has completed, so take appropriate actions."""
360
604
self.checker_callback_tag = None
361
605
self.checker = None
362
606
if os.WIFEXITED(condition):
363
exitstatus = os.WEXITSTATUS(condition)
364
if exitstatus == 0:
365
logger.info(u"Checker for %(name)s succeeded",
607
self.last_checker_status = os.WEXITSTATUS(condition)
608
if self.last_checker_status == 0:
609
logger.info("Checker for %(name)s succeeded",
366
610
vars(self))
367
611
self.checked_ok()
368
612
else:
369
logger.info(u"Checker for %(name)s failed",
613
logger.info("Checker for %(name)s failed",
370
614
vars(self))
371
615
else:
372
logger.warning(u"Checker for %(name)s crashed?",
616
self.last_checker_status = -1
617
logger.warning("Checker for %(name)s crashed?",
373
618
vars(self))
374
619
375
def checked_ok(self):
620
def checked_ok(self, timeout=None):
376
621
"""Bump up the timeout for this client.
377
622
378
623
This should only be called when the client has been seen,
379
624
alive and well.
380
625
"""
626
if timeout is None:
627
timeout = self.timeout
381
628
self.last_checked_ok = datetime.datetime.utcnow()
382
gobject.source_remove(self.disable_initiator_tag)
383
self.disable_initiator_tag = (gobject.timeout_add
384
(self.timeout_milliseconds(),
385
self.disable))
629
if self.disable_initiator_tag is not None:
630
gobject.source_remove(self.disable_initiator_tag)
631
if getattr(self, "enabled", False):
632
self.disable_initiator_tag = (gobject.timeout_add
633
(timedelta_to_milliseconds
634
(timeout), self.disable))
635
self.expires = datetime.datetime.utcnow() + timeout
636
637
def need_approval(self):
638
self.last_approval_request = datetime.datetime.utcnow()
386
639
387
640
def start_checker(self):
388
641
"""Start a new checker subprocess if one is not running.
395
648
# client would inevitably timeout, since no checker would get
396
649
# a chance to run to completion. If we instead leave running
397
650
# checkers alone, the checker would have to take more time
398
# than 'timeout' for the client to be declared invalid, which
399
# is as it should be.
651
# than 'timeout' for the client to be disabled, which is as it
652
# should be.
400
653
401
654
# If a checker exists, make sure it is not a zombie
402
655
try:
403
656
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
404
except (AttributeError, OSError), error:
657
except (AttributeError, OSError) as error:
405
658
if (isinstance(error, OSError)
406
659
and error.errno != errno.ECHILD):
407
660
raise error
408
661
else:
409
662
if pid:
410
logger.warning(u"Checker was a zombie")
663
logger.warning("Checker was a zombie")
411
664
gobject.source_remove(self.checker_callback_tag)
412
665
self.checker_callback(pid, status,
413
666
self.current_checker_command)
418
671
command = self.checker_command % self.host
419
672
except TypeError:
420
673
# Escape attributes for the shell
421
escaped_attrs = dict((key,
422
re.escape(unicode(str(val),
423
errors=
424
u'replace')))
425
for key, val in
426
vars(self).iteritems())
674
escaped_attrs = dict(
675
(attr,
676
re.escape(unicode(str(getattr(self, attr, "")),
677
errors=
678
'replace')))
679
for attr in
680
self.runtime_expansions)
681
427
682
try:
428
683
command = self.checker_command % escaped_attrs
429
except TypeError, error:
430
logger.error(u'Could not format string "%s":'
431
u' %s', self.checker_command, error)
684
except TypeError as error:
685
logger.error('Could not format string "%s":'
686
' %s', self.checker_command, error)
432
687
return True # Try again later
433
688
self.current_checker_command = command
434
689
try:
435
logger.info(u"Starting checker %r for %s",
690
logger.info("Starting checker %r for %s",
436
691
command, self.name)
437
692
# We don't need to redirect stdout and stderr, since
438
693
# in normal mode, that is already done by daemon(),
440
695
# always replaced by /dev/null.)
441
696
self.checker = subprocess.Popen(command,
442
697
close_fds=True,
443
shell=True, cwd=u"/")
698
shell=True, cwd="/")
444
699
self.checker_callback_tag = (gobject.child_watch_add
445
700
(self.checker.pid,
446
701
self.checker_callback,
451
706
if pid:
452
707
gobject.source_remove(self.checker_callback_tag)
453
708
self.checker_callback(pid, status, command)
454
except OSError, error:
455
logger.error(u"Failed to start subprocess: %s",
709
except OSError as error:
710
logger.error("Failed to start subprocess: %s",
456
711
error)
457
712
# Re-run this periodically if run by gobject.timeout_add
458
713
return True
462
717
if self.checker_callback_tag:
463
718
gobject.source_remove(self.checker_callback_tag)
464
719
self.checker_callback_tag = None
465
if getattr(self, u"checker", None) is None:
720
if getattr(self, "checker", None) is None:
466
721
return
467
logger.debug(u"Stopping checker for %(name)s", vars(self))
722
logger.debug("Stopping checker for %(name)s", vars(self))
468
723
try:
469
724
os.kill(self.checker.pid, signal.SIGTERM)
470
#os.sleep(0.5)
725
#time.sleep(0.5)
471
726
#if self.checker.poll() is None:
472
727
# os.kill(self.checker.pid, signal.SIGKILL)
473
except OSError, error:
728
except OSError as error:
474
729
if error.errno != errno.ESRCH: # No such process
475
730
raise
476
731
self.checker = None
477
478
def still_valid(self):
479
"""Has the timeout not yet passed for this client?"""
480
if not getattr(self, u"enabled", False):
481
return False
482
now = datetime.datetime.utcnow()
483
if self.last_checked_ok is None:
484
return now < (self.created + self.timeout)
485
else:
486
return now < (self.last_checked_ok + self.timeout)
487
488
489
def dbus_service_property(dbus_interface, signature=u"v",
490
access=u"readwrite", byte_arrays=False):
732
733
734
def dbus_service_property(dbus_interface, signature="v",
735
access="readwrite", byte_arrays=False):
491
736
"""Decorators for marking methods of a DBusObjectWithProperties to
492
737
become properties on the D-Bus.
493
738
498
743
dbus.service.method, except there is only "signature", since the
499
744
type from Get() and the type sent to Set() is the same.
500
745
"""
746
# Encoding deeply encoded byte arrays is not supported yet by the
747
# "Set" method, so we fail early here:
748
if byte_arrays and signature != "ay":
749
raise ValueError("Byte arrays not supported for non-'ay'"
750
" signature %r" % signature)
501
751
def decorator(func):
502
752
func._dbus_is_property = True
503
753
func._dbus_interface = dbus_interface
504
754
func._dbus_signature = signature
505
755
func._dbus_access = access
506
756
func._dbus_name = func.__name__
507
if func._dbus_name.endswith(u"_dbus_property"):
757
if func._dbus_name.endswith("_dbus_property"):
508
758
func._dbus_name = func._dbus_name[:-14]
509
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
759
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
510
760
return func
511
761
return decorator
512
762
532
782
533
783
class DBusObjectWithProperties(dbus.service.Object):
534
784
"""A D-Bus object with properties.
535
785
536
786
Classes inheriting from this can use the dbus_service_property
537
787
decorator to expose methods as D-Bus properties. It exposes the
538
788
standard Get(), Set(), and GetAll() methods on the D-Bus.
540
790
541
791
@staticmethod
542
792
def _is_dbus_property(obj):
543
return getattr(obj, u"_dbus_is_property", False)
793
return getattr(obj, "_dbus_is_property", False)
544
794
545
795
def _get_all_dbus_properties(self):
546
796
"""Returns a generator of (name, attribute) pairs
547
797
"""
548
return ((prop._dbus_name, prop)
798
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
799
for cls in self.__class__.__mro__
549
800
for name, prop in
550
inspect.getmembers(self, self._is_dbus_property))
801
inspect.getmembers(cls, self._is_dbus_property))
551
802
552
803
def _get_dbus_property(self, interface_name, property_name):
553
804
"""Returns a bound method if one exists which is a D-Bus
554
805
property with the specified name and interface.
555
806
"""
556
for name in (property_name,
557
property_name + u"_dbus_property"):
558
prop = getattr(self, name, None)
559
if (prop is None
560
or not self._is_dbus_property(prop)
561
or prop._dbus_name != property_name
562
or (interface_name and prop._dbus_interface
563
and interface_name != prop._dbus_interface)):
564
continue
565
return prop
807
for cls in self.__class__.__mro__:
808
for name, value in (inspect.getmembers
809
(cls, self._is_dbus_property)):
810
if (value._dbus_name == property_name
811
and value._dbus_interface == interface_name):
812
return value.__get__(self)
813
566
814
# No such property
567
raise DBusPropertyNotFound(self.dbus_object_path + u":"
568
+ interface_name + u"."
815
raise DBusPropertyNotFound(self.dbus_object_path + ":"
816
+ interface_name + "."
569
817
+ property_name)
570
818
571
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
572
out_signature=u"v")
819
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
820
out_signature="v")
573
821
def Get(self, interface_name, property_name):
574
822
"""Standard D-Bus property Get() method, see D-Bus standard.
575
823
"""
576
824
prop = self._get_dbus_property(interface_name, property_name)
577
if prop._dbus_access == u"write":
825
if prop._dbus_access == "write":
578
826
raise DBusPropertyAccessException(property_name)
579
827
value = prop()
580
if not hasattr(value, u"variant_level"):
828
if not hasattr(value, "variant_level"):
581
829
return value
582
830
return type(value)(value, variant_level=value.variant_level+1)
583
831
584
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
832
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
585
833
def Set(self, interface_name, property_name, value):
586
834
"""Standard D-Bus property Set() method, see D-Bus standard.
587
835
"""
588
836
prop = self._get_dbus_property(interface_name, property_name)
589
if prop._dbus_access == u"read":
837
if prop._dbus_access == "read":
590
838
raise DBusPropertyAccessException(property_name)
591
if prop._dbus_get_args_options[u"byte_arrays"]:
839
if prop._dbus_get_args_options["byte_arrays"]:
840
# The byte_arrays option is not supported yet on
841
# signatures other than "ay".
842
if prop._dbus_signature != "ay":
843
raise ValueError
592
844
value = dbus.ByteArray(''.join(unichr(byte)
593
845
for byte in value))
594
846
prop(value)
595
847
596
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
597
out_signature=u"a{sv}")
848
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
849
out_signature="a{sv}")
598
850
def GetAll(self, interface_name):
599
851
"""Standard D-Bus property GetAll() method, see D-Bus
600
852
standard.
601
853
602
854
Note: Will not include properties with access="write".
603
855
"""
604
all = {}
856
properties = {}
605
857
for name, prop in self._get_all_dbus_properties():
606
858
if (interface_name
607
859
and interface_name != prop._dbus_interface):
608
860
# Interface non-empty but did not match
609
861
continue
610
862
# Ignore write-only properties
611
if prop._dbus_access == u"write":
863
if prop._dbus_access == "write":
612
864
continue
613
865
value = prop()
614
if not hasattr(value, u"variant_level"):
615
all[name] = value
866
if not hasattr(value, "variant_level"):
867
properties[name] = value
616
868
continue
617
all[name] = type(value)(value, variant_level=
618
value.variant_level+1)
619
return dbus.Dictionary(all, signature=u"sv")
869
properties[name] = type(value)(value, variant_level=
870
value.variant_level+1)
871
return dbus.Dictionary(properties, signature="sv")
620
872
621
873
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
622
out_signature=u"s",
874
out_signature="s",
623
875
path_keyword='object_path',
624
876
connection_keyword='connection')
625
877
def Introspect(self, object_path, connection):
630
882
try:
631
883
document = xml.dom.minidom.parseString(xmlstring)
632
884
def make_tag(document, name, prop):
633
e = document.createElement(u"property")
634
e.setAttribute(u"name", name)
635
e.setAttribute(u"type", prop._dbus_signature)
636
e.setAttribute(u"access", prop._dbus_access)
885
e = document.createElement("property")
886
e.setAttribute("name", name)
887
e.setAttribute("type", prop._dbus_signature)
888
e.setAttribute("access", prop._dbus_access)
637
889
return e
638
for if_tag in document.getElementsByTagName(u"interface"):
890
for if_tag in document.getElementsByTagName("interface"):
639
891
for tag in (make_tag(document, name, prop)
640
892
for name, prop
641
893
in self._get_all_dbus_properties()
642
894
if prop._dbus_interface
643
== if_tag.getAttribute(u"name")):
895
== if_tag.getAttribute("name")):
644
896
if_tag.appendChild(tag)
645
897
# Add the names to the return values for the
646
898
# "org.freedesktop.DBus.Properties" methods
647
if (if_tag.getAttribute(u"name")
648
== u"org.freedesktop.DBus.Properties"):
649
for cn in if_tag.getElementsByTagName(u"method"):
650
if cn.getAttribute(u"name") == u"Get":
651
for arg in cn.getElementsByTagName(u"arg"):
652
if (arg.getAttribute(u"direction")
653
== u"out"):
654
arg.setAttribute(u"name", u"value")
655
elif cn.getAttribute(u"name") == u"GetAll":
656
for arg in cn.getElementsByTagName(u"arg"):
657
if (arg.getAttribute(u"direction")
658
== u"out"):
659
arg.setAttribute(u"name", u"props")
660
xmlstring = document.toxml(u"utf-8")
899
if (if_tag.getAttribute("name")
900
== "org.freedesktop.DBus.Properties"):
901
for cn in if_tag.getElementsByTagName("method"):
902
if cn.getAttribute("name") == "Get":
903
for arg in cn.getElementsByTagName("arg"):
904
if (arg.getAttribute("direction")
905
== "out"):
906
arg.setAttribute("name", "value")
907
elif cn.getAttribute("name") == "GetAll":
908
for arg in cn.getElementsByTagName("arg"):
909
if (arg.getAttribute("direction")
910
== "out"):
911
arg.setAttribute("name", "props")
912
xmlstring = document.toxml("utf-8")
661
913
document.unlink()
662
914
except (AttributeError, xml.dom.DOMException,
663
xml.parsers.expat.ExpatError), error:
664
logger.error(u"Failed to override Introspection method",
915
xml.parsers.expat.ExpatError) as error:
916
logger.error("Failed to override Introspection method",
665
917
error)
666
918
return xmlstring
667
919
668
920
921
def datetime_to_dbus (dt, variant_level=0):
922
"""Convert a UTC datetime.datetime() to a D-Bus type."""
923
if dt is None:
924
return dbus.String("", variant_level = variant_level)
925
return dbus.String(dt.isoformat(),
926
variant_level=variant_level)
927
928
929
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
930
.__metaclass__):
931
"""Applied to an empty subclass of a D-Bus object, this metaclass
932
will add additional D-Bus attributes matching a certain pattern.
933
"""
934
def __new__(mcs, name, bases, attr):
935
# Go through all the base classes which could have D-Bus
936
# methods, signals, or properties in them
937
for base in (b for b in bases
938
if issubclass(b, dbus.service.Object)):
939
# Go though all attributes of the base class
940
for attrname, attribute in inspect.getmembers(base):
941
# Ignore non-D-Bus attributes, and D-Bus attributes
942
# with the wrong interface name
943
if (not hasattr(attribute, "_dbus_interface")
944
or not attribute._dbus_interface
945
.startswith("se.recompile.Mandos")):
946
continue
947
# Create an alternate D-Bus interface name based on
948
# the current name
949
alt_interface = (attribute._dbus_interface
950
.replace("se.recompile.Mandos",
951
"se.bsnet.fukt.Mandos"))
952
# Is this a D-Bus signal?
953
if getattr(attribute, "_dbus_is_signal", False):
954
# Extract the original non-method function by
955
# black magic
956
nonmethod_func = (dict(
957
zip(attribute.func_code.co_freevars,
958
attribute.__closure__))["func"]
959
.cell_contents)
960
# Create a new, but exactly alike, function
961
# object, and decorate it to be a new D-Bus signal
962
# with the alternate D-Bus interface name
963
new_function = (dbus.service.signal
964
(alt_interface,
965
attribute._dbus_signature)
966
(types.FunctionType(
967
nonmethod_func.func_code,
968
nonmethod_func.func_globals,
969
nonmethod_func.func_name,
970
nonmethod_func.func_defaults,
971
nonmethod_func.func_closure)))
972
# Define a creator of a function to call both the
973
# old and new functions, so both the old and new
974
# signals gets sent when the function is called
975
def fixscope(func1, func2):
976
"""This function is a scope container to pass
977
func1 and func2 to the "call_both" function
978
outside of its arguments"""
979
def call_both(*args, **kwargs):
980
"""This function will emit two D-Bus
981
signals by calling func1 and func2"""
982
func1(*args, **kwargs)
983
func2(*args, **kwargs)
984
return call_both
985
# Create the "call_both" function and add it to
986
# the class
987
attr[attrname] = fixscope(attribute,
988
new_function)
989
# Is this a D-Bus method?
990
elif getattr(attribute, "_dbus_is_method", False):
991
# Create a new, but exactly alike, function
992
# object. Decorate it to be a new D-Bus method
993
# with the alternate D-Bus interface name. Add it
994
# to the class.
995
attr[attrname] = (dbus.service.method
996
(alt_interface,
997
attribute._dbus_in_signature,
998
attribute._dbus_out_signature)
999
(types.FunctionType
1000
(attribute.func_code,
1001
attribute.func_globals,
1002
attribute.func_name,
1003
attribute.func_defaults,
1004
attribute.func_closure)))
1005
# Is this a D-Bus property?
1006
elif getattr(attribute, "_dbus_is_property", False):
1007
# Create a new, but exactly alike, function
1008
# object, and decorate it to be a new D-Bus
1009
# property with the alternate D-Bus interface
1010
# name. Add it to the class.
1011
attr[attrname] = (dbus_service_property
1012
(alt_interface,
1013
attribute._dbus_signature,
1014
attribute._dbus_access,
1015
attribute
1016
._dbus_get_args_options
1017
["byte_arrays"])
1018
(types.FunctionType
1019
(attribute.func_code,
1020
attribute.func_globals,
1021
attribute.func_name,
1022
attribute.func_defaults,
1023
attribute.func_closure)))
1024
return type.__new__(mcs, name, bases, attr)
1025
1026
669
1027
class ClientDBus(Client, DBusObjectWithProperties):
670
1028
"""A Client class using D-Bus
671
1029
673
1031
dbus_object_path: dbus.ObjectPath
674
1032
bus: dbus.SystemBus()
675
1033
"""
1034
1035
runtime_expansions = (Client.runtime_expansions
1036
+ ("dbus_object_path",))
1037
676
1038
# dbus.service.Object doesn't use super(), so we can't either.
677
1039
678
1040
def __init__(self, bus = None, *args, **kwargs):
679
1041
self.bus = bus
680
1042
Client.__init__(self, *args, **kwargs)
1043
self._approvals_pending = 0
1044
1045
self._approvals_pending = 0
681
1046
# Only now, when this client is initialized, can it show up on
682
1047
# the D-Bus
1048
client_object_name = unicode(self.name).translate(
1049
{ord("."): ord("_"),
1050
ord("-"): ord("_")})
683
1051
self.dbus_object_path = (dbus.ObjectPath
684
(u"/clients/"
685
+ self.name.replace(u".", u"_")))
1052
("/clients/" + client_object_name))
686
1053
DBusObjectWithProperties.__init__(self, self.bus,
687
1054
self.dbus_object_path)
688
689
@staticmethod
690
def _datetime_to_dbus(dt, variant_level=0):
691
"""Convert a UTC datetime.datetime() to a D-Bus type."""
692
return dbus.String(dt.isoformat(),
693
variant_level=variant_level)
694
695
def enable(self):
696
oldstate = getattr(self, u"enabled", False)
697
r = Client.enable(self)
698
if oldstate != self.enabled:
699
# Emit D-Bus signals
700
self.PropertyChanged(dbus.String(u"enabled"),
701
dbus.Boolean(True, variant_level=1))
702
self.PropertyChanged(
703
dbus.String(u"last_enabled"),
704
self._datetime_to_dbus(self.last_enabled,
705
variant_level=1))
706
return r
707
708
def disable(self, signal = True):
709
oldstate = getattr(self, u"enabled", False)
710
r = Client.disable(self)
711
if signal and oldstate != self.enabled:
712
# Emit D-Bus signal
713
self.PropertyChanged(dbus.String(u"enabled"),
714
dbus.Boolean(False, variant_level=1))
715
return r
1055
1056
def notifychangeproperty(transform_func,
1057
dbus_name, type_func=lambda x: x,
1058
variant_level=1):
1059
""" Modify a variable so that it's a property which announces
1060
its changes to DBus.
1061
1062
transform_fun: Function that takes a value and a variant_level
1063
and transforms it to a D-Bus type.
1064
dbus_name: D-Bus name of the variable
1065
type_func: Function that transform the value before sending it
1066
to the D-Bus. Default: no transform
1067
variant_level: D-Bus variant level. Default: 1
1068
"""
1069
attrname = "_{0}".format(dbus_name)
1070
def setter(self, value):
1071
if hasattr(self, "dbus_object_path"):
1072
if (not hasattr(self, attrname) or
1073
type_func(getattr(self, attrname, None))
1074
!= type_func(value)):
1075
dbus_value = transform_func(type_func(value),
1076
variant_level
1077
=variant_level)
1078
self.PropertyChanged(dbus.String(dbus_name),
1079
dbus_value)
1080
setattr(self, attrname, value)
1081
1082
return property(lambda self: getattr(self, attrname), setter)
1083
1084
1085
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1086
approvals_pending = notifychangeproperty(dbus.Boolean,
1087
"ApprovalPending",
1088
type_func = bool)
1089
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1090
last_enabled = notifychangeproperty(datetime_to_dbus,
1091
"LastEnabled")
1092
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1093
type_func = lambda checker:
1094
checker is not None)
1095
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1096
"LastCheckedOK")
1097
last_approval_request = notifychangeproperty(
1098
datetime_to_dbus, "LastApprovalRequest")
1099
approved_by_default = notifychangeproperty(dbus.Boolean,
1100
"ApprovedByDefault")
1101
approval_delay = notifychangeproperty(dbus.UInt64,
1102
"ApprovalDelay",
1103
type_func =
1104
timedelta_to_milliseconds)
1105
approval_duration = notifychangeproperty(
1106
dbus.UInt64, "ApprovalDuration",
1107
type_func = timedelta_to_milliseconds)
1108
host = notifychangeproperty(dbus.String, "Host")
1109
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1110
type_func =
1111
timedelta_to_milliseconds)
1112
extended_timeout = notifychangeproperty(
1113
dbus.UInt64, "ExtendedTimeout",
1114
type_func = timedelta_to_milliseconds)
1115
interval = notifychangeproperty(dbus.UInt64,
1116
"Interval",
1117
type_func =
1118
timedelta_to_milliseconds)
1119
checker_command = notifychangeproperty(dbus.String, "Checker")
1120
1121
del notifychangeproperty
716
1122
717
1123
def __del__(self, *args, **kwargs):
718
1124
try:
719
1125
self.remove_from_connection()
720
1126
except LookupError:
721
1127
pass
722
if hasattr(DBusObjectWithProperties, u"__del__"):
1128
if hasattr(DBusObjectWithProperties, "__del__"):
723
1129
DBusObjectWithProperties.__del__(self, *args, **kwargs)
724
1130
Client.__del__(self, *args, **kwargs)
725
1131
727
1133
*args, **kwargs):
728
1134
self.checker_callback_tag = None
729
1135
self.checker = None
730
# Emit D-Bus signal
731
self.PropertyChanged(dbus.String(u"checker_running"),
732
dbus.Boolean(False, variant_level=1))
733
1136
if os.WIFEXITED(condition):
734
1137
exitstatus = os.WEXITSTATUS(condition)
735
1138
# Emit D-Bus signal
745
1148
return Client.checker_callback(self, pid, condition, command,
746
1149
*args, **kwargs)
747
1150
748
def checked_ok(self, *args, **kwargs):
749
r = Client.checked_ok(self, *args, **kwargs)
750
# Emit D-Bus signal
751
self.PropertyChanged(
752
dbus.String(u"last_checked_ok"),
753
(self._datetime_to_dbus(self.last_checked_ok,
754
variant_level=1)))
755
return r
756
757
1151
def start_checker(self, *args, **kwargs):
758
1152
old_checker = self.checker
759
1153
if self.checker is not None:
766
1160
and old_checker_pid != self.checker.pid):
767
1161
# Emit D-Bus signal
768
1162
self.CheckerStarted(self.current_checker_command)
769
self.PropertyChanged(
770
dbus.String(u"checker_running"),
771
dbus.Boolean(True, variant_level=1))
772
return r
773
774
def stop_checker(self, *args, **kwargs):
775
old_checker = getattr(self, u"checker", None)
776
r = Client.stop_checker(self, *args, **kwargs)
777
if (old_checker is not None
778
and getattr(self, u"checker", None) is None):
779
self.PropertyChanged(dbus.String(u"checker_running"),
780
dbus.Boolean(False, variant_level=1))
781
return r
782
783
## D-Bus methods & signals
784
_interface = u"se.bsnet.fukt.Mandos.Client"
785
786
# CheckedOK - method
787
@dbus.service.method(_interface)
788
def CheckedOK(self):
789
return self.checked_ok()
1163
return r
1164
1165
def _reset_approved(self):
1166
self.approved = None
1167
return False
1168
1169
def approve(self, value=True):
1170
self.send_changedstate()
1171
self.approved = value
1172
gobject.timeout_add(timedelta_to_milliseconds
1173
(self.approval_duration),
1174
self._reset_approved)
1175
1176
1177
## D-Bus methods, signals & properties
1178
_interface = "se.recompile.Mandos.Client"
1179
1180
## Signals
790
1181
791
1182
# CheckerCompleted - signal
792
@dbus.service.signal(_interface, signature=u"nxs")
1183
@dbus.service.signal(_interface, signature="nxs")
793
1184
def CheckerCompleted(self, exitcode, waitstatus, command):
794
1185
"D-Bus signal"
795
1186
pass
796
1187
797
1188
# CheckerStarted - signal
798
@dbus.service.signal(_interface, signature=u"s")
1189
@dbus.service.signal(_interface, signature="s")
799
1190
def CheckerStarted(self, command):
800
1191
"D-Bus signal"
801
1192
pass
802
1193
803
1194
# PropertyChanged - signal
804
@dbus.service.signal(_interface, signature=u"sv")
1195
@dbus.service.signal(_interface, signature="sv")
805
1196
def PropertyChanged(self, property, value):
806
1197
"D-Bus signal"
807
1198
pass
809
1200
# GotSecret - signal
810
1201
@dbus.service.signal(_interface)
811
1202
def GotSecret(self):
812
"D-Bus signal"
1203
"""D-Bus signal
1204
Is sent after a successful transfer of secret from the Mandos
1205
server to mandos-client
1206
"""
813
1207
pass
814
1208
815
1209
# Rejected - signal
816
@dbus.service.signal(_interface)
817
def Rejected(self):
818
"D-Bus signal"
819
pass
1210
@dbus.service.signal(_interface, signature="s")
1211
def Rejected(self, reason):
1212
"D-Bus signal"
1213
pass
1214
1215
# NeedApproval - signal
1216
@dbus.service.signal(_interface, signature="tb")
1217
def NeedApproval(self, timeout, default):
1218
"D-Bus signal"
1219
return self.need_approval()
1220
1221
# NeRwequest - signal
1222
@dbus.service.signal(_interface, signature="s")
1223
def NewRequest(self, ip):
1224
"""D-Bus signal
1225
Is sent after a client request a password.
1226
"""
1227
pass
1228
1229
## Methods
1230
1231
# Approve - method
1232
@dbus.service.method(_interface, in_signature="b")
1233
def Approve(self, value):
1234
self.approve(value)
1235
1236
# CheckedOK - method
1237
@dbus.service.method(_interface)
1238
def CheckedOK(self):
1239
self.checked_ok()
820
1240
821
1241
# Enable - method
822
1242
@dbus.service.method(_interface)
841
1261
def StopChecker(self):
842
1262
self.stop_checker()
843
1263
844
# name - property
845
@dbus_service_property(_interface, signature=u"s", access=u"read")
846
def name_dbus_property(self):
1264
## Properties
1265
1266
# ApprovalPending - property
1267
@dbus_service_property(_interface, signature="b", access="read")
1268
def ApprovalPending_dbus_property(self):
1269
return dbus.Boolean(bool(self.approvals_pending))
1270
1271
# ApprovedByDefault - property
1272
@dbus_service_property(_interface, signature="b",
1273
access="readwrite")
1274
def ApprovedByDefault_dbus_property(self, value=None):
1275
if value is None: # get
1276
return dbus.Boolean(self.approved_by_default)
1277
self.approved_by_default = bool(value)
1278
1279
# ApprovalDelay - property
1280
@dbus_service_property(_interface, signature="t",
1281
access="readwrite")
1282
def ApprovalDelay_dbus_property(self, value=None):
1283
if value is None: # get
1284
return dbus.UInt64(self.approval_delay_milliseconds())
1285
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1286
1287
# ApprovalDuration - property
1288
@dbus_service_property(_interface, signature="t",
1289
access="readwrite")
1290
def ApprovalDuration_dbus_property(self, value=None):
1291
if value is None: # get
1292
return dbus.UInt64(timedelta_to_milliseconds(
1293
self.approval_duration))
1294
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1295
1296
# Name - property
1297
@dbus_service_property(_interface, signature="s", access="read")
1298
def Name_dbus_property(self):
847
1299
return dbus.String(self.name)
848
1300
849
# fingerprint - property
850
@dbus_service_property(_interface, signature=u"s", access=u"read")
851
def fingerprint_dbus_property(self):
1301
# Fingerprint - property
1302
@dbus_service_property(_interface, signature="s", access="read")
1303
def Fingerprint_dbus_property(self):
852
1304
return dbus.String(self.fingerprint)
853
1305
854
# host - property
855
@dbus_service_property(_interface, signature=u"s",
856
access=u"readwrite")
857
def host_dbus_property(self, value=None):
1306
# Host - property
1307
@dbus_service_property(_interface, signature="s",
1308
access="readwrite")
1309
def Host_dbus_property(self, value=None):
858
1310
if value is None: # get
859
1311
return dbus.String(self.host)
860
self.host = value
861
# Emit D-Bus signal
862
self.PropertyChanged(dbus.String(u"host"),
863
dbus.String(value, variant_level=1))
864
865
# created - property
866
@dbus_service_property(_interface, signature=u"s", access=u"read")
867
def created_dbus_property(self):
868
return dbus.String(self._datetime_to_dbus(self.created))
869
870
# last_enabled - property
871
@dbus_service_property(_interface, signature=u"s", access=u"read")
872
def last_enabled_dbus_property(self):
873
if self.last_enabled is None:
874
return dbus.String(u"")
875
return dbus.String(self._datetime_to_dbus(self.last_enabled))
876
877
# enabled - property
878
@dbus_service_property(_interface, signature=u"b",
879
access=u"readwrite")
880
def enabled_dbus_property(self, value=None):
1312
self.host = unicode(value)
1313
1314
# Created - property
1315
@dbus_service_property(_interface, signature="s", access="read")
1316
def Created_dbus_property(self):
1317
return datetime_to_dbus(self.created)
1318
1319
# LastEnabled - property
1320
@dbus_service_property(_interface, signature="s", access="read")
1321
def LastEnabled_dbus_property(self):
1322
return datetime_to_dbus(self.last_enabled)
1323
1324
# Enabled - property
1325
@dbus_service_property(_interface, signature="b",
1326
access="readwrite")
1327
def Enabled_dbus_property(self, value=None):
881
1328
if value is None: # get
882
1329
return dbus.Boolean(self.enabled)
883
1330
if value:
885
1332
else:
886
1333
self.disable()
887
1334
888
# last_checked_ok - property
889
@dbus_service_property(_interface, signature=u"s",
890
access=u"readwrite")
891
def last_checked_ok_dbus_property(self, value=None):
1335
# LastCheckedOK - property
1336
@dbus_service_property(_interface, signature="s",
1337
access="readwrite")
1338
def LastCheckedOK_dbus_property(self, value=None):
892
1339
if value is not None:
893
1340
self.checked_ok()
894
1341
return
895
if self.last_checked_ok is None:
896
return dbus.String(u"")
897
return dbus.String(self._datetime_to_dbus(self
898
.last_checked_ok))
899
900
# timeout - property
901
@dbus_service_property(_interface, signature=u"t",
902
access=u"readwrite")
903
def timeout_dbus_property(self, value=None):
1342
return datetime_to_dbus(self.last_checked_ok)
1343
1344
# Expires - property
1345
@dbus_service_property(_interface, signature="s", access="read")
1346
def Expires_dbus_property(self):
1347
return datetime_to_dbus(self.expires)
1348
1349
# LastApprovalRequest - property
1350
@dbus_service_property(_interface, signature="s", access="read")
1351
def LastApprovalRequest_dbus_property(self):
1352
return datetime_to_dbus(self.last_approval_request)
1353
1354
# Timeout - property
1355
@dbus_service_property(_interface, signature="t",
1356
access="readwrite")
1357
def Timeout_dbus_property(self, value=None):
904
1358
if value is None: # get
905
1359
return dbus.UInt64(self.timeout_milliseconds())
906
1360
self.timeout = datetime.timedelta(0, 0, 0, value)
907
# Emit D-Bus signal
908
self.PropertyChanged(dbus.String(u"timeout"),
909
dbus.UInt64(value, variant_level=1))
910
if getattr(self, u"disable_initiator_tag", None) is None:
1361
if getattr(self, "disable_initiator_tag", None) is None:
911
1362
return
912
1363
# Reschedule timeout
913
1364
gobject.source_remove(self.disable_initiator_tag)
914
1365
self.disable_initiator_tag = None
915
time_to_die = (self.
916
_timedelta_to_milliseconds((self
917
.last_checked_ok
918
+ self.timeout)
919
- datetime.datetime
920
.utcnow()))
1366
self.expires = None
1367
time_to_die = timedelta_to_milliseconds((self
1368
.last_checked_ok
1369
+ self.timeout)
1370
- datetime.datetime
1371
.utcnow())
921
1372
if time_to_die <= 0:
922
1373
# The timeout has passed
923
1374
self.disable()
924
1375
else:
1376
self.expires = (datetime.datetime.utcnow()
1377
+ datetime.timedelta(milliseconds =
1378
time_to_die))
925
1379
self.disable_initiator_tag = (gobject.timeout_add
926
1380
(time_to_die, self.disable))
927
1381
928
# interval - property
929
@dbus_service_property(_interface, signature=u"t",
930
access=u"readwrite")
931
def interval_dbus_property(self, value=None):
1382
# ExtendedTimeout - property
1383
@dbus_service_property(_interface, signature="t",
1384
access="readwrite")
1385
def ExtendedTimeout_dbus_property(self, value=None):
1386
if value is None: # get
1387
return dbus.UInt64(self.extended_timeout_milliseconds())
1388
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1389
1390
# Interval - property
1391
@dbus_service_property(_interface, signature="t",
1392
access="readwrite")
1393
def Interval_dbus_property(self, value=None):
932
1394
if value is None: # get
933
1395
return dbus.UInt64(self.interval_milliseconds())
934
1396
self.interval = datetime.timedelta(0, 0, 0, value)
935
# Emit D-Bus signal
936
self.PropertyChanged(dbus.String(u"interval"),
937
dbus.UInt64(value, variant_level=1))
938
if getattr(self, u"checker_initiator_tag", None) is None:
1397
if getattr(self, "checker_initiator_tag", None) is None:
939
1398
return
940
# Reschedule checker run
941
gobject.source_remove(self.checker_initiator_tag)
942
self.checker_initiator_tag = (gobject.timeout_add
943
(value, self.start_checker))
944
self.start_checker() # Start one now, too
945
946
# checker - property
947
@dbus_service_property(_interface, signature=u"s",
948
access=u"readwrite")
949
def checker_dbus_property(self, value=None):
1399
if self.enabled:
1400
# Reschedule checker run
1401
gobject.source_remove(self.checker_initiator_tag)
1402
self.checker_initiator_tag = (gobject.timeout_add
1403
(value, self.start_checker))
1404
self.start_checker() # Start one now, too
1405
1406
# Checker - property
1407
@dbus_service_property(_interface, signature="s",
1408
access="readwrite")
1409
def Checker_dbus_property(self, value=None):
950
1410
if value is None: # get
951
1411
return dbus.String(self.checker_command)
952
self.checker_command = value
953
# Emit D-Bus signal
954
self.PropertyChanged(dbus.String(u"checker"),
955
dbus.String(self.checker_command,
956
variant_level=1))
1412
self.checker_command = unicode(value)
957
1413
958
# checker_running - property
959
@dbus_service_property(_interface, signature=u"b",
960
access=u"readwrite")
961
def checker_running_dbus_property(self, value=None):
1414
# CheckerRunning - property
1415
@dbus_service_property(_interface, signature="b",
1416
access="readwrite")
1417
def CheckerRunning_dbus_property(self, value=None):
962
1418
if value is None: # get
963
1419
return dbus.Boolean(self.checker is not None)
964
1420
if value:
966
1422
else:
967
1423
self.stop_checker()
968
1424
969
# object_path - property
970
@dbus_service_property(_interface, signature=u"o", access=u"read")
971
def object_path_dbus_property(self):
1425
# ObjectPath - property
1426
@dbus_service_property(_interface, signature="o", access="read")
1427
def ObjectPath_dbus_property(self):
972
1428
return self.dbus_object_path # is already a dbus.ObjectPath
973
1429
974
# secret = property
975
@dbus_service_property(_interface, signature=u"ay",
976
access=u"write", byte_arrays=True)
977
def secret_dbus_property(self, value):
1430
# Secret = property
1431
@dbus_service_property(_interface, signature="ay",
1432
access="write", byte_arrays=True)
1433
def Secret_dbus_property(self, value):
978
1434
self.secret = str(value)
979
1435
980
1436
del _interface
981
1437
982
1438
1439
class ProxyClient(object):
1440
def __init__(self, child_pipe, fpr, address):
1441
self._pipe = child_pipe
1442
self._pipe.send(('init', fpr, address))
1443
if not self._pipe.recv():
1444
raise KeyError()
1445
1446
def __getattribute__(self, name):
1447
if name == '_pipe':
1448
return super(ProxyClient, self).__getattribute__(name)
1449
self._pipe.send(('getattr', name))
1450
data = self._pipe.recv()
1451
if data[0] == 'data':
1452
return data[1]
1453
if data[0] == 'function':
1454
def func(*args, **kwargs):
1455
self._pipe.send(('funcall', name, args, kwargs))
1456
return self._pipe.recv()[1]
1457
return func
1458
1459
def __setattr__(self, name, value):
1460
if name == '_pipe':
1461
return super(ProxyClient, self).__setattr__(name, value)
1462
self._pipe.send(('setattr', name, value))
1463
1464
1465
class ClientDBusTransitional(ClientDBus):
1466
__metaclass__ = AlternateDBusNamesMetaclass
1467
1468
983
1469
class ClientHandler(socketserver.BaseRequestHandler, object):
984
1470
"""A class to handle client connections.
985
1471
987
1473
Note: This will run in its own forked process."""
988
1474
989
1475
def handle(self):
990
logger.info(u"TCP connection from: %s",
991
unicode(self.client_address))
992
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
993
# Open IPC pipe to parent process
994
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1476
with contextlib.closing(self.server.child_pipe) as child_pipe:
1477
logger.info("TCP connection from: %s",
1478
unicode(self.client_address))
1479
logger.debug("Pipe FD: %d",
1480
self.server.child_pipe.fileno())
1481
995
1482
session = (gnutls.connection
996
1483
.ClientSession(self.request,
997
1484
gnutls.connection
998
1485
.X509Credentials()))
999
1486
1000
line = self.request.makefile().readline()
1001
logger.debug(u"Protocol version: %r", line)
1002
try:
1003
if int(line.strip().split()[0]) > 1:
1004
raise RuntimeError
1005
except (ValueError, IndexError, RuntimeError), error:
1006
logger.error(u"Unknown protocol version: %s", error)
1007
return
1008
1009
1487
# Note: gnutls.connection.X509Credentials is really a
1010
1488
# generic GnuTLS certificate credentials object so long as
1011
1489
# no X.509 keys are added to it. Therefore, we can use it
1012
1490
# here despite using OpenPGP certificates.
1013
1491
1014
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1015
# u"+AES-256-CBC", u"+SHA1",
1016
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1017
# u"+DHE-DSS"))
1492
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1493
# "+AES-256-CBC", "+SHA1",
1494
# "+COMP-NULL", "+CTYPE-OPENPGP",
1495
# "+DHE-DSS"))
1018
1496
# Use a fallback default, since this MUST be set.
1019
1497
priority = self.server.gnutls_priority
1020
1498
if priority is None:
1021
priority = u"NORMAL"
1499
priority = "NORMAL"
1022
1500
(gnutls.library.functions
1023
1501
.gnutls_priority_set_direct(session._c_object,
1024
1502
priority, None))
1025
1503
1504
# Start communication using the Mandos protocol
1505
# Get protocol number
1506
line = self.request.makefile().readline()
1507
logger.debug("Protocol version: %r", line)
1508
try:
1509
if int(line.strip().split()[0]) > 1:
1510
raise RuntimeError
1511
except (ValueError, IndexError, RuntimeError) as error:
1512
logger.error("Unknown protocol version: %s", error)
1513
return
1514
1515
# Start GnuTLS connection
1026
1516
try:
1027
1517
session.handshake()
1028
except gnutls.errors.GNUTLSError, error:
1029
logger.warning(u"Handshake failed: %s", error)
1518
except gnutls.errors.GNUTLSError as error:
1519
logger.warning("Handshake failed: %s", error)
1030
1520
# Do not run session.bye() here: the session is not
1031
1521
# established. Just abandon the request.
1032
1522
return
1033
logger.debug(u"Handshake succeeded")
1523
logger.debug("Handshake succeeded")
1524
1525
approval_required = False
1034
1526
try:
1035
fpr = self.fingerprint(self.peer_certificate(session))
1036
except (TypeError, gnutls.errors.GNUTLSError), error:
1037
logger.warning(u"Bad certificate: %s", error)
1038
session.bye()
1039
return
1040
logger.debug(u"Fingerprint: %s", fpr)
1527
try:
1528
fpr = self.fingerprint(self.peer_certificate
1529
(session))
1530
except (TypeError,
1531
gnutls.errors.GNUTLSError) as error:
1532
logger.warning("Bad certificate: %s", error)
1533
return
1534
logger.debug("Fingerprint: %s", fpr)
1535
1536
try:
1537
client = ProxyClient(child_pipe, fpr,
1538
self.client_address)
1539
except KeyError:
1540
return
1541
1542
if self.server.use_dbus:
1543
# Emit D-Bus signal
1544
client.NewRequest(str(self.client_address))
1545
1546
if client.approval_delay:
1547
delay = client.approval_delay
1548
client.approvals_pending += 1
1549
approval_required = True
1550
1551
while True:
1552
if not client.enabled:
1553
logger.info("Client %s is disabled",
1554
client.name)
1555
if self.server.use_dbus:
1556
# Emit D-Bus signal
1557
client.Rejected("Disabled")
1558
return
1559
1560
if client.approved or not client.approval_delay:
1561
#We are approved or approval is disabled
1562
break
1563
elif client.approved is None:
1564
logger.info("Client %s needs approval",
1565
client.name)
1566
if self.server.use_dbus:
1567
# Emit D-Bus signal
1568
client.NeedApproval(
1569
client.approval_delay_milliseconds(),
1570
client.approved_by_default)
1571
else:
1572
logger.warning("Client %s was not approved",
1573
client.name)
1574
if self.server.use_dbus:
1575
# Emit D-Bus signal
1576
client.Rejected("Denied")
1577
return
1578
1579
#wait until timeout or approved
1580
time = datetime.datetime.now()
1581
client.changedstate.acquire()
1582
(client.changedstate.wait
1583
(float(client.timedelta_to_milliseconds(delay)
1584
/ 1000)))
1585
client.changedstate.release()
1586
time2 = datetime.datetime.now()
1587
if (time2 - time) >= delay:
1588
if not client.approved_by_default:
1589
logger.warning("Client %s timed out while"
1590
" waiting for approval",
1591
client.name)
1592
if self.server.use_dbus:
1593
# Emit D-Bus signal
1594
client.Rejected("Approval timed out")
1595
return
1596
else:
1597
break
1598
else:
1599
delay -= time2 - time
1600
1601
sent_size = 0
1602
while sent_size < len(client.secret):
1603
try:
1604
sent = session.send(client.secret[sent_size:])
1605
except gnutls.errors.GNUTLSError as error:
1606
logger.warning("gnutls send failed")
1607
return
1608
logger.debug("Sent: %d, remaining: %d",
1609
sent, len(client.secret)
1610
- (sent_size + sent))
1611
sent_size += sent
1612
1613
logger.info("Sending secret to %s", client.name)
1614
# bump the timeout using extended_timeout
1615
client.checked_ok(client.extended_timeout)
1616
if self.server.use_dbus:
1617
# Emit D-Bus signal
1618
client.GotSecret()
1041
1619
1042
for c in self.server.clients:
1043
if c.fingerprint == fpr:
1044
client = c
1045
break
1046
else:
1047
ipc.write(u"NOTFOUND %s %s\n"
1048
% (fpr, unicode(self.client_address)))
1049
session.bye()
1050
return
1051
# Have to check if client.still_valid(), since it is
1052
# possible that the client timed out while establishing
1053
# the GnuTLS session.
1054
if not client.still_valid():
1055
ipc.write(u"INVALID %s\n" % client.name)
1056
session.bye()
1057
return
1058
ipc.write(u"SENDING %s\n" % client.name)
1059
sent_size = 0
1060
while sent_size < len(client.secret):
1061
sent = session.send(client.secret[sent_size:])
1062
logger.debug(u"Sent: %d, remaining: %d",
1063
sent, len(client.secret)
1064
- (sent_size + sent))
1065
sent_size += sent
1066
session.bye()
1620
finally:
1621
if approval_required:
1622
client.approvals_pending -= 1
1623
try:
1624
session.bye()
1625
except gnutls.errors.GNUTLSError as error:
1626
logger.warning("GnuTLS bye failed")
1067
1627
1068
1628
@staticmethod
1069
1629
def peer_certificate(session):
1079
1639
.gnutls_certificate_get_peers
1080
1640
(session._c_object, ctypes.byref(list_size)))
1081
1641
if not bool(cert_list) and list_size.value != 0:
1082
raise gnutls.errors.GNUTLSError(u"error getting peer"
1083
u" certificate")
1642
raise gnutls.errors.GNUTLSError("error getting peer"
1643
" certificate")
1084
1644
if list_size.value == 0:
1085
1645
return None
1086
1646
cert = cert_list[0]
1112
1672
if crtverify.value != 0:
1113
1673
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1114
1674
raise (gnutls.errors.CertificateSecurityError
1115
(u"Verify failed"))
1675
("Verify failed"))
1116
1676
# New buffer for the fingerprint
1117
1677
buf = ctypes.create_string_buffer(20)
1118
1678
buf_len = ctypes.c_size_t()
1125
1685
# Convert the buffer to a Python bytestring
1126
1686
fpr = ctypes.string_at(buf, buf_len.value)
1127
1687
# Convert the bytestring to hexadecimal notation
1128
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1688
hex_fpr = binascii.hexlify(fpr).upper()
1129
1689
return hex_fpr
1130
1690
1131
1691
1132
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1133
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1692
class MultiprocessingMixIn(object):
1693
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1694
def sub_process_main(self, request, address):
1695
try:
1696
self.finish_request(request, address)
1697
except Exception:
1698
self.handle_error(request, address)
1699
self.close_request(request)
1700
1701
def process_request(self, request, address):
1702
"""Start a new process to process the request."""
1703
proc = multiprocessing.Process(target = self.sub_process_main,
1704
args = (request,
1705
address))
1706
proc.start()
1707
return proc
1708
1709
1710
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1711
""" adds a pipe to the MixIn """
1134
1712
def process_request(self, request, client_address):
1135
1713
"""Overrides and wraps the original process_request().
1136
1714
1137
1715
This function creates a new pipe in self.pipe
1138
1716
"""
1139
self.pipe = os.pipe()
1140
super(ForkingMixInWithPipe,
1141
self).process_request(request, client_address)
1142
os.close(self.pipe[1]) # close write end
1143
self.add_pipe(self.pipe[0])
1144
def add_pipe(self, pipe):
1717
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1718
1719
proc = MultiprocessingMixIn.process_request(self, request,
1720
client_address)
1721
self.child_pipe.close()
1722
self.add_pipe(parent_pipe, proc)
1723
1724
def add_pipe(self, parent_pipe, proc):
1145
1725
"""Dummy function; override as necessary"""
1146
os.close(pipe)
1147
1148
1149
class IPv6_TCPServer(ForkingMixInWithPipe,
1726
raise NotImplementedError
1727
1728
1729
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1150
1730
socketserver.TCPServer, object):
1151
1731
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1152
1732
1168
1748
bind to an address or port if they were not specified."""
1169
1749
if self.interface is not None:
1170
1750
if SO_BINDTODEVICE is None:
1171
logger.error(u"SO_BINDTODEVICE does not exist;"
1172
u" cannot bind to interface %s",
1751
logger.error("SO_BINDTODEVICE does not exist;"
1752
" cannot bind to interface %s",
1173
1753
self.interface)
1174
1754
else:
1175
1755
try:
1176
1756
self.socket.setsockopt(socket.SOL_SOCKET,
1177
1757
SO_BINDTODEVICE,
1178
1758
str(self.interface
1179
+ u'\0'))
1180
except socket.error, error:
1759
+ '\0'))
1760
except socket.error as error:
1181
1761
if error[0] == errno.EPERM:
1182
logger.error(u"No permission to"
1183
u" bind to interface %s",
1762
logger.error("No permission to"
1763
" bind to interface %s",
1184
1764
self.interface)
1185
1765
elif error[0] == errno.ENOPROTOOPT:
1186
logger.error(u"SO_BINDTODEVICE not available;"
1187
u" cannot bind to interface %s",
1766
logger.error("SO_BINDTODEVICE not available;"
1767
" cannot bind to interface %s",
1188
1768
self.interface)
1189
1769
else:
1190
1770
raise
1192
1772
if self.server_address[0] or self.server_address[1]:
1193
1773
if not self.server_address[0]:
1194
1774
if self.address_family == socket.AF_INET6:
1195
any_address = u"::" # in6addr_any
1775
any_address = "::" # in6addr_any
1196
1776
else:
1197
1777
any_address = socket.INADDR_ANY
1198
1778
self.server_address = (any_address,
1225
1805
self.enabled = False
1226
1806
self.clients = clients
1227
1807
if self.clients is None:
1228
self.clients = set()
1808
self.clients = {}
1229
1809
self.use_dbus = use_dbus
1230
1810
self.gnutls_priority = gnutls_priority
1231
1811
IPv6_TCPServer.__init__(self, server_address,
1235
1815
def server_activate(self):
1236
1816
if self.enabled:
1237
1817
return socketserver.TCPServer.server_activate(self)
1818
1238
1819
def enable(self):
1239
1820
self.enabled = True
1240
def add_pipe(self, pipe):
1821
1822
def add_pipe(self, parent_pipe, proc):
1241
1823
# Call "handle_ipc" for both data and EOF events
1242
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1243
self.handle_ipc)
1244
def handle_ipc(self, source, condition, file_objects={}):
1824
gobject.io_add_watch(parent_pipe.fileno(),
1825
gobject.IO_IN | gobject.IO_HUP,
1826
functools.partial(self.handle_ipc,
1827
parent_pipe =
1828
parent_pipe,
1829
proc = proc))
1830
1831
def handle_ipc(self, source, condition, parent_pipe=None,
1832
proc = None, client_object=None):
1245
1833
condition_names = {
1246
gobject.IO_IN: u"IN", # There is data to read.
1247
gobject.IO_OUT: u"OUT", # Data can be written (without
1834
gobject.IO_IN: "IN", # There is data to read.
1835
gobject.IO_OUT: "OUT", # Data can be written (without
1248
1836
# blocking).
1249
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1250
gobject.IO_ERR: u"ERR", # Error condition.
1251
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1837
gobject.IO_PRI: "PRI", # There is urgent data to read.
1838
gobject.IO_ERR: "ERR", # Error condition.
1839
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1252
1840
# broken, usually for pipes and
1253
1841
# sockets).
1254
1842
}
1256
1844
for cond, name in
1257
1845
condition_names.iteritems()
1258
1846
if cond & condition)
1259
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1260
conditions_string)
1261
1262
# Turn the pipe file descriptor into a Python file object
1263
if source not in file_objects:
1264
file_objects[source] = os.fdopen(source, u"r", 1)
1265
1266
# Read a line from the file object
1267
cmdline = file_objects[source].readline()
1268
if not cmdline: # Empty line means end of file
1269
# close the IPC pipe
1270
file_objects[source].close()
1271
del file_objects[source]
1272
1273
# Stop calling this function
1274
return False
1275
1276
logger.debug(u"IPC command: %r", cmdline)
1277
1278
# Parse and act on command
1279
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1280
1281
if cmd == u"NOTFOUND":
1282
logger.warning(u"Client not found for fingerprint: %s",
1283
args)
1284
if self.use_dbus:
1285
# Emit D-Bus signal
1286
mandos_dbus_service.ClientNotFound(args)
1287
elif cmd == u"INVALID":
1288
for client in self.clients:
1289
if client.name == args:
1290
logger.warning(u"Client %s is invalid", args)
1291
if self.use_dbus:
1292
# Emit D-Bus signal
1293
client.Rejected()
1294
break
1295
else:
1296
logger.error(u"Unknown client %s is invalid", args)
1297
elif cmd == u"SENDING":
1298
for client in self.clients:
1299
if client.name == args:
1300
logger.info(u"Sending secret to %s", client.name)
1301
client.checked_ok()
1302
if self.use_dbus:
1303
# Emit D-Bus signal
1304
client.GotSecret()
1305
break
1306
else:
1307
logger.error(u"Sending secret to unknown client %s",
1308
args)
1309
else:
1310
logger.error(u"Unknown IPC command: %r", cmdline)
1311
1312
# Keep calling this function
1847
# error, or the other end of multiprocessing.Pipe has closed
1848
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1849
# Wait for other process to exit
1850
proc.join()
1851
return False
1852
1853
# Read a request from the child
1854
request = parent_pipe.recv()
1855
command = request[0]
1856
1857
if command == 'init':
1858
fpr = request[1]
1859
address = request[2]
1860
1861
for c in self.clients.itervalues():
1862
if c.fingerprint == fpr:
1863
client = c
1864
break
1865
else:
1866
logger.info("Client not found for fingerprint: %s, ad"
1867
"dress: %s", fpr, address)
1868
if self.use_dbus:
1869
# Emit D-Bus signal
1870
mandos_dbus_service.ClientNotFound(fpr,
1871
address[0])
1872
parent_pipe.send(False)
1873
return False
1874
1875
gobject.io_add_watch(parent_pipe.fileno(),
1876
gobject.IO_IN | gobject.IO_HUP,
1877
functools.partial(self.handle_ipc,
1878
parent_pipe =
1879
parent_pipe,
1880
proc = proc,
1881
client_object =
1882
client))
1883
parent_pipe.send(True)
1884
# remove the old hook in favor of the new above hook on
1885
# same fileno
1886
return False
1887
if command == 'funcall':
1888
funcname = request[1]
1889
args = request[2]
1890
kwargs = request[3]
1891
1892
parent_pipe.send(('data', getattr(client_object,
1893
funcname)(*args,
1894
**kwargs)))
1895
1896
if command == 'getattr':
1897
attrname = request[1]
1898
if callable(client_object.__getattribute__(attrname)):
1899
parent_pipe.send(('function',))
1900
else:
1901
parent_pipe.send(('data', client_object
1902
.__getattribute__(attrname)))
1903
1904
if command == 'setattr':
1905
attrname = request[1]
1906
value = request[2]
1907
setattr(client_object, attrname, value)
1908
1313
1909
return True
1314
1910
1315
1911
1316
1912
def string_to_delta(interval):
1317
1913
"""Parse a string and return a datetime.timedelta
1318
1914
1319
>>> string_to_delta(u'7d')
1915
>>> string_to_delta('7d')
1320
1916
datetime.timedelta(7)
1321
>>> string_to_delta(u'60s')
1917
>>> string_to_delta('60s')
1322
1918
datetime.timedelta(0, 60)
1323
>>> string_to_delta(u'60m')
1919
>>> string_to_delta('60m')
1324
1920
datetime.timedelta(0, 3600)
1325
>>> string_to_delta(u'24h')
1921
>>> string_to_delta('24h')
1326
1922
datetime.timedelta(1)
1327
>>> string_to_delta(u'1w')
1923
>>> string_to_delta('1w')
1328
1924
datetime.timedelta(7)
1329
>>> string_to_delta(u'5m 30s')
1925
>>> string_to_delta('5m 30s')
1330
1926
datetime.timedelta(0, 330)
1331
1927
"""
1332
1928
timevalue = datetime.timedelta(0)
1334
1930
try:
1335
1931
suffix = unicode(s[-1])
1336
1932
value = int(s[:-1])
1337
if suffix == u"d":
1933
if suffix == "d":
1338
1934
delta = datetime.timedelta(value)
1339
elif suffix == u"s":
1935
elif suffix == "s":
1340
1936
delta = datetime.timedelta(0, value)
1341
elif suffix == u"m":
1937
elif suffix == "m":
1342
1938
delta = datetime.timedelta(0, 0, 0, 0, value)
1343
elif suffix == u"h":
1939
elif suffix == "h":
1344
1940
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1345
elif suffix == u"w":
1941
elif suffix == "w":
1346
1942
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1347
1943
else:
1348
raise ValueError
1349
except (ValueError, IndexError):
1350
raise ValueError
1944
raise ValueError("Unknown suffix %r" % suffix)
1945
except (ValueError, IndexError) as e:
1946
raise ValueError(*(e.args))
1351
1947
timevalue += delta
1352
1948
return timevalue
1353
1949
1354
1950
1355
def if_nametoindex(interface):
1356
"""Call the C function if_nametoindex(), or equivalent
1357
1358
Note: This function cannot accept a unicode string."""
1359
global if_nametoindex
1360
try:
1361
if_nametoindex = (ctypes.cdll.LoadLibrary
1362
(ctypes.util.find_library(u"c"))
1363
.if_nametoindex)
1364
except (OSError, AttributeError):
1365
logger.warning(u"Doing if_nametoindex the hard way")
1366
def if_nametoindex(interface):
1367
"Get an interface index the hard way, i.e. using fcntl()"
1368
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1369
with closing(socket.socket()) as s:
1370
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1371
struct.pack(str(u"16s16x"),
1372
interface))
1373
interface_index = struct.unpack(str(u"I"),
1374
ifreq[16:20])[0]
1375
return interface_index
1376
return if_nametoindex(interface)
1377
1378
1379
1951
def daemon(nochdir = False, noclose = False):
1380
1952
"""See daemon(3). Standard BSD Unix function.
1381
1953
1384
1956
sys.exit()
1385
1957
os.setsid()
1386
1958
if not nochdir:
1387
os.chdir(u"/")
1959
os.chdir("/")
1388
1960
if os.fork():
1389
1961
sys.exit()
1390
1962
if not noclose:
1392
1964
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1393
1965
if not stat.S_ISCHR(os.fstat(null).st_mode):
1394
1966
raise OSError(errno.ENODEV,
1395
u"%s not a character device"
1967
"%s not a character device"
1396
1968
% os.path.devnull)
1397
1969
os.dup2(null, sys.stdin.fileno())
1398
1970
os.dup2(null, sys.stdout.fileno())
1406
1978
##################################################################
1407
1979
# Parsing of options, both command line and config file
1408
1980
1409
parser = optparse.OptionParser(version = "%%prog %s" % version)
1410
parser.add_option("-i", u"--interface", type=u"string",
1411
metavar="IF", help=u"Bind to interface IF")
1412
parser.add_option("-a", u"--address", type=u"string",
1413
help=u"Address to listen for requests on")
1414
parser.add_option("-p", u"--port", type=u"int",
1415
help=u"Port number to receive requests on")
1416
parser.add_option("--check", action=u"store_true",
1417
help=u"Run self-test")
1418
parser.add_option("--debug", action=u"store_true",
1419
help=u"Debug mode; run in foreground and log to"
1420
u" terminal")
1421
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1422
u" priority string (see GnuTLS documentation)")
1423
parser.add_option("--servicename", type=u"string",
1424
metavar=u"NAME", help=u"Zeroconf service name")
1425
parser.add_option("--configdir", type=u"string",
1426
default=u"/etc/mandos", metavar=u"DIR",
1427
help=u"Directory to search for configuration"
1428
u" files")
1429
parser.add_option("--no-dbus", action=u"store_false",
1430
dest=u"use_dbus", help=u"Do not provide D-Bus"
1431
u" system bus interface")
1432
parser.add_option("--no-ipv6", action=u"store_false",
1433
dest=u"use_ipv6", help=u"Do not use IPv6")
1434
options = parser.parse_args()[0]
1981
parser = argparse.ArgumentParser()
1982
parser.add_argument("-v", "--version", action="version",
1983
version = "%%(prog)s %s" % version,
1984
help="show version number and exit")
1985
parser.add_argument("-i", "--interface", metavar="IF",
1986
help="Bind to interface IF")
1987
parser.add_argument("-a", "--address",
1988
help="Address to listen for requests on")
1989
parser.add_argument("-p", "--port", type=int,
1990
help="Port number to receive requests on")
1991
parser.add_argument("--check", action="store_true",
1992
help="Run self-test")
1993
parser.add_argument("--debug", action="store_true",
1994
help="Debug mode; run in foreground and log"
1995
" to terminal")
1996
parser.add_argument("--debuglevel", metavar="LEVEL",
1997
help="Debug level for stdout output")
1998
parser.add_argument("--priority", help="GnuTLS"
1999
" priority string (see GnuTLS documentation)")
2000
parser.add_argument("--servicename",
2001
metavar="NAME", help="Zeroconf service name")
2002
parser.add_argument("--configdir",
2003
default="/etc/mandos", metavar="DIR",
2004
help="Directory to search for configuration"
2005
" files")
2006
parser.add_argument("--no-dbus", action="store_false",
2007
dest="use_dbus", help="Do not provide D-Bus"
2008
" system bus interface")
2009
parser.add_argument("--no-ipv6", action="store_false",
2010
dest="use_ipv6", help="Do not use IPv6")
2011
parser.add_argument("--no-restore", action="store_false",
2012
dest="restore", help="Do not restore stored"
2013
" state")
2014
parser.add_argument("--statedir", metavar="DIR",
2015
help="Directory to save/restore state in")
2016
2017
options = parser.parse_args()
1435
2018
1436
2019
if options.check:
1437
2020
import doctest
1439
2022
sys.exit()
1440
2023
1441
2024
# Default values for config file for server-global settings
1442
server_defaults = { u"interface": u"",
1443
u"address": u"",
1444
u"port": u"",
1445
u"debug": u"False",
1446
u"priority":
1447
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1448
u"servicename": u"Mandos",
1449
u"use_dbus": u"True",
1450
u"use_ipv6": u"True",
2025
server_defaults = { "interface": "",
2026
"address": "",
2027
"port": "",
2028
"debug": "False",
2029
"priority":
2030
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2031
"servicename": "Mandos",
2032
"use_dbus": "True",
2033
"use_ipv6": "True",
2034
"debuglevel": "",
2035
"restore": "True",
2036
"statedir": "/var/lib/mandos"
1451
2037
}
1452
2038
1453
2039
# Parse config file for server-global settings
1454
2040
server_config = configparser.SafeConfigParser(server_defaults)
1455
2041
del server_defaults
1456
2042
server_config.read(os.path.join(options.configdir,
1457
u"mandos.conf"))
2043
"mandos.conf"))
1458
2044
# Convert the SafeConfigParser object to a dict
1459
2045
server_settings = server_config.defaults()
1460
2046
# Use the appropriate methods on the non-string config options
1461
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1462
server_settings[option] = server_config.getboolean(u"DEFAULT",
2047
for option in ("debug", "use_dbus", "use_ipv6"):
2048
server_settings[option] = server_config.getboolean("DEFAULT",
1463
2049
option)
1464
2050
if server_settings["port"]:
1465
server_settings["port"] = server_config.getint(u"DEFAULT",
1466
u"port")
2051
server_settings["port"] = server_config.getint("DEFAULT",
2052
"port")
1467
2053
del server_config
1468
2054
1469
2055
# Override the settings from the config file with command line
1470
2056
# options, if set.
1471
for option in (u"interface", u"address", u"port", u"debug",
1472
u"priority", u"servicename", u"configdir",
1473
u"use_dbus", u"use_ipv6"):
2057
for option in ("interface", "address", "port", "debug",
2058
"priority", "servicename", "configdir",
2059
"use_dbus", "use_ipv6", "debuglevel", "restore",
2060
"statedir"):
1474
2061
value = getattr(options, option)
1475
2062
if value is not None:
1476
2063
server_settings[option] = value
1484
2071
##################################################################
1485
2072
1486
2073
# For convenience
1487
debug = server_settings[u"debug"]
1488
use_dbus = server_settings[u"use_dbus"]
1489
use_ipv6 = server_settings[u"use_ipv6"]
1490
1491
if not debug:
1492
syslogger.setLevel(logging.WARNING)
1493
console.setLevel(logging.WARNING)
1494
1495
if server_settings[u"servicename"] != u"Mandos":
2074
debug = server_settings["debug"]
2075
debuglevel = server_settings["debuglevel"]
2076
use_dbus = server_settings["use_dbus"]
2077
use_ipv6 = server_settings["use_ipv6"]
2078
stored_state_path = os.path.join(server_settings["statedir"],
2079
stored_state_file)
2080
2081
if debug:
2082
initlogger(debug, logging.DEBUG)
2083
else:
2084
if not debuglevel:
2085
initlogger(debug)
2086
else:
2087
level = getattr(logging, debuglevel.upper())
2088
initlogger(debug, level)
2089
2090
if server_settings["servicename"] != "Mandos":
1496
2091
syslogger.setFormatter(logging.Formatter
1497
(u'Mandos (%s) [%%(process)d]:'
1498
u' %%(levelname)s: %%(message)s'
1499
% server_settings[u"servicename"]))
2092
('Mandos (%s) [%%(process)d]:'
2093
' %%(levelname)s: %%(message)s'
2094
% server_settings["servicename"]))
1500
2095
1501
2096
# Parse config file with clients
1502
client_defaults = { u"timeout": u"1h",
1503
u"interval": u"5m",
1504
u"checker": u"fping -q -- %%(host)s",
1505
u"host": u"",
1506
}
1507
client_config = configparser.SafeConfigParser(client_defaults)
1508
client_config.read(os.path.join(server_settings[u"configdir"],
1509
u"clients.conf"))
2097
client_config = configparser.SafeConfigParser(Client.client_defaults)
2098
client_config.read(os.path.join(server_settings["configdir"],
2099
"clients.conf"))
1510
2100
1511
2101
global mandos_dbus_service
1512
2102
mandos_dbus_service = None
1513
2103
1514
tcp_server = MandosServer((server_settings[u"address"],
1515
server_settings[u"port"]),
2104
tcp_server = MandosServer((server_settings["address"],
2105
server_settings["port"]),
1516
2106
ClientHandler,
1517
interface=server_settings[u"interface"],
2107
interface=(server_settings["interface"]
2108
or None),
1518
2109
use_ipv6=use_ipv6,
1519
2110
gnutls_priority=
1520
server_settings[u"priority"],
2111
server_settings["priority"],
1521
2112
use_dbus=use_dbus)
1522
pidfilename = u"/var/run/mandos.pid"
1523
try:
1524
pidfile = open(pidfilename, u"w")
1525
except IOError:
1526
logger.error(u"Could not open file %r", pidfilename)
2113
if not debug:
2114
pidfilename = "/var/run/mandos.pid"
2115
try:
2116
pidfile = open(pidfilename, "w")
2117
except IOError:
2118
logger.error("Could not open file %r", pidfilename)
1527
2119
1528
2120
try:
1529
uid = pwd.getpwnam(u"_mandos").pw_uid
1530
gid = pwd.getpwnam(u"_mandos").pw_gid
2121
uid = pwd.getpwnam("_mandos").pw_uid
2122
gid = pwd.getpwnam("_mandos").pw_gid
1531
2123
except KeyError:
1532
2124
try:
1533
uid = pwd.getpwnam(u"mandos").pw_uid
1534
gid = pwd.getpwnam(u"mandos").pw_gid
2125
uid = pwd.getpwnam("mandos").pw_uid
2126
gid = pwd.getpwnam("mandos").pw_gid
1535
2127
except KeyError:
1536
2128
try:
1537
uid = pwd.getpwnam(u"nobody").pw_uid
1538
gid = pwd.getpwnam(u"nobody").pw_gid
2129
uid = pwd.getpwnam("nobody").pw_uid
2130
gid = pwd.getpwnam("nobody").pw_gid
1539
2131
except KeyError:
1540
2132
uid = 65534
1541
2133
gid = 65534
1542
2134
try:
1543
2135
os.setgid(gid)
1544
2136
os.setuid(uid)
1545
except OSError, error:
2137
except OSError as error:
1546
2138
if error[0] != errno.EPERM:
1547
2139
raise error
1548
2140
1549
# Enable all possible GnuTLS debugging
1550
2141
if debug:
2142
# Enable all possible GnuTLS debugging
2143
1551
2144
# "Use a log level over 10 to enable all debugging options."
1552
2145
# - GnuTLS manual
1553
2146
gnutls.library.functions.gnutls_global_set_log_level(11)
1554
2147
1555
2148
@gnutls.library.types.gnutls_log_func
1556
2149
def debug_gnutls(level, string):
1557
logger.debug(u"GnuTLS: %s", string[:-1])
2150
logger.debug("GnuTLS: %s", string[:-1])
1558
2151
1559
2152
(gnutls.library.functions
1560
2153
.gnutls_global_set_log_function(debug_gnutls))
2154
2155
# Redirect stdin so all checkers get /dev/null
2156
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2157
os.dup2(null, sys.stdin.fileno())
2158
if null > 2:
2159
os.close(null)
2160
2161
# Need to fork before connecting to D-Bus
2162
if not debug:
2163
# Close all input and output, do double fork, etc.
2164
daemon()
2165
2166
gobject.threads_init()
1561
2167
1562
2168
global main_loop
1563
2169
# From the Avahi example code
1566
2172
bus = dbus.SystemBus()
1567
2173
# End of Avahi example code
1568
2174
if use_dbus:
1569
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
1570
2186
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1571
service = AvahiService(name = server_settings[u"servicename"],
1572
servicetype = u"_mandos._tcp",
1573
protocol = protocol, bus = bus)
2187
service = AvahiServiceToSyslog(name =
2188
server_settings["servicename"],
2189
servicetype = "_mandos._tcp",
2190
protocol = protocol, bus = bus)
1574
2191
if server_settings["interface"]:
1575
2192
service.interface = (if_nametoindex
1576
(str(server_settings[u"interface"])))
2193
(str(server_settings["interface"])))
2194
2195
global multiprocessing_manager
2196
multiprocessing_manager = multiprocessing.Manager()
1577
2197
1578
2198
client_class = Client
1579
2199
if use_dbus:
1580
client_class = functools.partial(ClientDBus, bus = bus)
1581
tcp_server.clients.update(set(
1582
client_class(name = section,
1583
config= dict(client_config.items(section)))
1584
for section in client_config.sections()))
2200
client_class = functools.partial(ClientDBusTransitional,
2201
bus = bus)
2202
2203
client_settings = Client.config_parser(client_config)
2204
old_client_settings = {}
2205
clients_data = {}
2206
2207
# Get client data and settings from last running state.
2208
if server_settings["restore"]:
2209
try:
2210
with open(stored_state_path, "rb") as stored_state:
2211
clients_data, old_client_settings = (pickle.load
2212
(stored_state))
2213
os.remove(stored_state_path)
2214
except IOError as e:
2215
logger.warning("Could not load persistent state: {0}"
2216
.format(e))
2217
if e.errno != errno.ENOENT:
2218
raise
2219
except EOFError as e:
2220
logger.warning("Could not load persistent state: "
2221
"EOFError: {0}".format(e))
2222
2223
with PGPEngine() as pgp:
2224
for client_name, client in clients_data.iteritems():
2225
# Decide which value to use after restoring saved state.
2226
# We have three different values: Old config file,
2227
# new config file, and saved state.
2228
# New config value takes precedence if it differs from old
2229
# config value, otherwise use saved state.
2230
for name, value in client_settings[client_name].items():
2231
try:
2232
# For each value in new config, check if it
2233
# differs from the old config value (Except for
2234
# the "secret" attribute)
2235
if (name != "secret" and
2236
value != old_client_settings[client_name]
2237
[name]):
2238
client[name] = value
2239
except KeyError:
2240
pass
2241
2242
# Clients who has passed its expire date can still be
2243
# enabled if its last checker was successful. Clients
2244
# whose checker failed before we stored its state is
2245
# assumed to have failed all checkers during downtime.
2246
if client["enabled"]:
2247
if datetime.datetime.utcnow() >= client["expires"]:
2248
if not client["last_checked_ok"]:
2249
logger.warning(
2250
"disabling client {0} - Client never "
2251
"performed a successfull checker"
2252
.format(client["name"]))
2253
client["enabled"] = False
2254
elif client["last_checker_status"] != 0:
2255
logger.warning(
2256
"disabling client {0} - Client "
2257
"last checker failed with error code {1}"
2258
.format(client["name"],
2259
client["last_checker_status"]))
2260
client["enabled"] = False
2261
else:
2262
client["expires"] = (datetime.datetime
2263
.utcnow()
2264
+ client["timeout"])
2265
2266
try:
2267
client["secret"] = (
2268
pgp.decrypt(client["encrypted_secret"],
2269
client_settings[client_name]
2270
["secret"]))
2271
except PGPError:
2272
# If decryption fails, we use secret from new settings
2273
logger.debug("Failed to decrypt {0} old secret"
2274
.format(client_name))
2275
client["secret"] = (
2276
client_settings[client_name]["secret"])
2277
2278
2279
# Add/remove clients based on new changes made to config
2280
for client_name in set(old_client_settings) - set(client_settings):
2281
del clients_data[client_name]
2282
for client_name in set(client_settings) - set(old_client_settings):
2283
clients_data[client_name] = client_settings[client_name]
2284
2285
# Create clients all clients
2286
for client_name, client in clients_data.iteritems():
2287
tcp_server.clients[client_name] = client_class(
2288
name = client_name, settings = client)
2289
1585
2290
if not tcp_server.clients:
1586
logger.warning(u"No clients defined")
1587
1588
if debug:
1589
# Redirect stdin so all checkers get /dev/null
1590
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1591
os.dup2(null, sys.stdin.fileno())
1592
if null > 2:
1593
os.close(null)
1594
else:
1595
# No console logging
1596
logger.removeHandler(console)
1597
# Close all input and output, do double fork, etc.
1598
daemon()
1599
1600
try:
1601
with closing(pidfile):
1602
pid = os.getpid()
1603
pidfile.write(str(pid) + "\n")
1604
del pidfile
1605
except IOError:
1606
logger.error(u"Could not write to file %r with PID %d",
1607
pidfilename, pid)
1608
except NameError:
1609
# "pidfile" was never created
1610
pass
1611
del pidfilename
1612
1613
def cleanup():
1614
"Cleanup function; run on exit"
1615
service.cleanup()
2291
logger.warning("No clients defined")
1616
2292
1617
while tcp_server.clients:
1618
client = tcp_server.clients.pop()
1619
client.disable_hook = None
1620
client.disable()
1621
1622
atexit.register(cleanup)
1623
1624
2293
if not debug:
2294
try:
2295
with pidfile:
2296
pid = os.getpid()
2297
pidfile.write(str(pid) + "\n".encode("utf-8"))
2298
del pidfile
2299
except IOError:
2300
logger.error("Could not write to file %r with PID %d",
2301
pidfilename, pid)
2302
except NameError:
2303
# "pidfile" was never created
2304
pass
2305
del pidfilename
1625
2306
signal.signal(signal.SIGINT, signal.SIG_IGN)
2307
1626
2308
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1627
2309
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1628
2310
1630
2312
class MandosDBusService(dbus.service.Object):
1631
2313
"""A D-Bus proxy object"""
1632
2314
def __init__(self):
1633
dbus.service.Object.__init__(self, bus, u"/")
1634
_interface = u"se.bsnet.fukt.Mandos"
1635
1636
@dbus.service.signal(_interface, signature=u"oa{sv}")
1637
def ClientAdded(self, objpath, properties):
1638
"D-Bus signal"
1639
pass
1640
1641
@dbus.service.signal(_interface, signature=u"s")
1642
def ClientNotFound(self, fingerprint):
1643
"D-Bus signal"
1644
pass
1645
1646
@dbus.service.signal(_interface, signature=u"os")
2315
dbus.service.Object.__init__(self, bus, "/")
2316
_interface = "se.recompile.Mandos"
2317
2318
@dbus.service.signal(_interface, signature="o")
2319
def ClientAdded(self, objpath):
2320
"D-Bus signal"
2321
pass
2322
2323
@dbus.service.signal(_interface, signature="ss")
2324
def ClientNotFound(self, fingerprint, address):
2325
"D-Bus signal"
2326
pass
2327
2328
@dbus.service.signal(_interface, signature="os")
1647
2329
def ClientRemoved(self, objpath, name):
1648
2330
"D-Bus signal"
1649
2331
pass
1650
2332
1651
@dbus.service.method(_interface, out_signature=u"ao")
2333
@dbus.service.method(_interface, out_signature="ao")
1652
2334
def GetAllClients(self):
1653
2335
"D-Bus method"
1654
2336
return dbus.Array(c.dbus_object_path
1655
for c in tcp_server.clients)
2337
for c in
2338
tcp_server.clients.itervalues())
1656
2339
1657
2340
@dbus.service.method(_interface,
1658
out_signature=u"a{oa{sv}}")
2341
out_signature="a{oa{sv}}")
1659
2342
def GetAllClientsWithProperties(self):
1660
2343
"D-Bus method"
1661
2344
return dbus.Dictionary(
1662
((c.dbus_object_path, c.GetAll(u""))
1663
for c in tcp_server.clients),
1664
signature=u"oa{sv}")
2345
((c.dbus_object_path, c.GetAll(""))
2346
for c in tcp_server.clients.itervalues()),
2347
signature="oa{sv}")
1665
2348
1666
@dbus.service.method(_interface, in_signature=u"o")
2349
@dbus.service.method(_interface, in_signature="o")
1667
2350
def RemoveClient(self, object_path):
1668
2351
"D-Bus method"
1669
for c in tcp_server.clients:
2352
for c in tcp_server.clients.itervalues():
1670
2353
if c.dbus_object_path == object_path:
1671
tcp_server.clients.remove(c)
2354
del tcp_server.clients[c.name]
1672
2355
c.remove_from_connection()
1673
2356
# Don't signal anything except ClientRemoved
1674
c.disable(signal=False)
2357
c.disable(quiet=True)
1675
2358
# Emit D-Bus signal
1676
2359
self.ClientRemoved(object_path, c.name)
1677
2360
return
1678
raise KeyError
2361
raise KeyError(object_path)
1679
2362
1680
2363
del _interface
1681
2364
1682
mandos_dbus_service = MandosDBusService()
1683
1684
for client in tcp_server.clients:
2365
class MandosDBusServiceTransitional(MandosDBusService):
2366
__metaclass__ = AlternateDBusNamesMetaclass
2367
mandos_dbus_service = MandosDBusServiceTransitional()
2368
2369
def cleanup():
2370
"Cleanup function; run on exit"
2371
service.cleanup()
2372
2373
multiprocessing.active_children()
2374
if not (tcp_server.clients or client_settings):
2375
return
2376
2377
# Store client before exiting. Secrets are encrypted with key
2378
# based on what config file has. If config file is
2379
# removed/edited, old secret will thus be unrecovable.
2380
clients = {}
2381
with PGPEngine() as pgp:
2382
for client in tcp_server.clients.itervalues():
2383
key = client_settings[client.name]["secret"]
2384
client.encrypted_secret = pgp.encrypt(client.secret,
2385
key)
2386
client_dict = {}
2387
2388
# A list of attributes that can not be pickled
2389
# + secret.
2390
exclude = set(("bus", "changedstate", "secret",
2391
"checker"))
2392
for name, typ in (inspect.getmembers
2393
(dbus.service.Object)):
2394
exclude.add(name)
2395
2396
client_dict["encrypted_secret"] = (client
2397
.encrypted_secret)
2398
for attr in client.client_structure:
2399
if attr not in exclude:
2400
client_dict[attr] = getattr(client, attr)
2401
2402
clients[client.name] = client_dict
2403
del client_settings[client.name]["secret"]
2404
2405
try:
2406
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2407
prefix="clients-",
2408
dir=os.path.dirname
2409
(stored_state_path))
2410
with os.fdopen(tempfd, "wb") as stored_state:
2411
pickle.dump((clients, client_settings), stored_state)
2412
os.rename(tempname, stored_state_path)
2413
except (IOError, OSError) as e:
2414
logger.warning("Could not save persistent state: {0}"
2415
.format(e))
2416
if not debug:
2417
try:
2418
os.remove(tempname)
2419
except NameError:
2420
pass
2421
if e.errno not in set((errno.ENOENT, errno.EACCES,
2422
errno.EEXIST)):
2423
raise e
2424
2425
# Delete all clients, and settings from config
2426
while tcp_server.clients:
2427
name, client = tcp_server.clients.popitem()
2428
if use_dbus:
2429
client.remove_from_connection()
2430
# Don't signal anything except ClientRemoved
2431
client.disable(quiet=True)
2432
if use_dbus:
2433
# Emit D-Bus signal
2434
mandos_dbus_service.ClientRemoved(client
2435
.dbus_object_path,
2436
client.name)
2437
client_settings.clear()
2438
2439
atexit.register(cleanup)
2440
2441
for client in tcp_server.clients.itervalues():
1685
2442
if use_dbus:
1686
2443
# Emit D-Bus signal
1687
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1688
client.GetAll(u""))
1689
client.enable()
2444
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2445
# Need to initiate checking of clients
2446
if client.enabled:
2447
client.init_checker()
1690
2448
1691
2449
tcp_server.enable()
1692
2450
tcp_server.server_activate()
1694
2452
# Find out what port we got
1695
2453
service.port = tcp_server.socket.getsockname()[1]
1696
2454
if use_ipv6:
1697
logger.info(u"Now listening on address %r, port %d,"
2455
logger.info("Now listening on address %r, port %d,"
1698
2456
" flowinfo %d, scope_id %d"
1699
2457
% tcp_server.socket.getsockname())
1700
2458
else: # IPv4
1701
logger.info(u"Now listening on address %r, port %d"
2459
logger.info("Now listening on address %r, port %d"
1702
2460
% tcp_server.socket.getsockname())
1703
2461
1704
2462
#service.interface = tcp_server.socket.getsockname()[3]
1707
2465
# From the Avahi example code
1708
2466
try:
1709
2467
service.activate()
1710
except dbus.exceptions.DBusException, error:
1711
logger.critical(u"DBusException: %s", error)
2468
except dbus.exceptions.DBusException as error:
2469
logger.critical("DBusException: %s", error)
2470
cleanup()
1712
2471
sys.exit(1)
1713
2472
# End of Avahi example code
1714
2473
1717
2476
(tcp_server.handle_request
1718
2477
(*args[2:], **kwargs) or True))
1719
2478
1720
logger.debug(u"Starting main loop")
2479
logger.debug("Starting main loop")
1721
2480
main_loop.run()
1722
except AvahiError, error:
1723
logger.critical(u"AvahiError: %s", error)
2481
except AvahiError as error:
2482
logger.critical("AvahiError: %s", error)
2483
cleanup()
1724
2484
sys.exit(1)
1725
2485
except KeyboardInterrupt:
1726
2486
if debug:
1727
print >> sys.stderr
1728
logger.debug(u"Server received KeyboardInterrupt")
1729
logger.debug(u"Server exiting")
2487
print("", file=sys.stderr)
2488
logger.debug("Server received KeyboardInterrupt")
2489
logger.debug("Server exiting")
2490
# Must run before the D-Bus bus name gets deregistered
2491
cleanup()
1730
2492
1731
2493
if __name__ == '__main__':
1732
2494
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0