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- Committer: Teddy Hogeborn
- Author(s): Robert Millan
- Date: 2012-05-12 19:54:59 UTC
- mto: (237.4.30 release)
- mto: This revision was merged to the branch mainline in revision 586.
- Revision ID: teddy@recompile.se-20120512195459-5h1pm9auzxcey6y0
* debian/changelog (1.5.3-1.2): New entry.
* debian/control (Package: mandos-client/Architecture): Changed to
"linux-any".
* debian/control (Package: mandos-client/Architecture): Changed to
"linux-any".
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
16
16
#
17
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# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
35
36
36
37
import SocketServer as socketserver
37
38
import socket
38
import optparse
39
import argparse
39
40
import datetime
40
41
import errno
41
42
import gnutls.crypto
55
56
import logging
56
57
import logging.handlers
57
58
import pwd
58
from contextlib import closing
59
import contextlib
59
60
import struct
60
61
import fcntl
61
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
67
import tempfile
62
68
63
69
import dbus
64
70
import dbus.service
69
75
import ctypes.util
70
76
import xml.dom.minidom
71
77
import inspect
78
import GnuPGInterface
72
79
73
80
try:
74
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
85
except ImportError:
79
86
SO_BINDTODEVICE = None
80
87
81
82
version = "1.0.12"
83
84
logger = logging.Logger(u'mandos')
88
version = "1.5.3"
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)
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logger.setLevel(level)
129
130
131
class PGPError(Exception):
132
"""Exception if encryption/decryption fails"""
133
pass
134
135
136
class PGPEngine(object):
137
"""A simple class for OpenPGP symmetric encryption & decryption"""
138
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
147
148
def __enter__(self):
149
return self
150
151
def __exit__ (self, exc_type, exc_value, traceback):
152
self._cleanup()
153
return False
154
155
def __del__(self):
156
self._cleanup()
157
158
def _cleanup(self):
159
if self.tempdir is not None:
160
# Delete contents of tempdir
161
for root, dirs, files in os.walk(self.tempdir,
162
topdown = False):
163
for filename in files:
164
os.remove(os.path.join(root, filename))
165
for dirname in dirs:
166
os.rmdir(os.path.join(root, dirname))
167
# Remove tempdir
168
os.rmdir(self.tempdir)
169
self.tempdir = None
170
171
def password_encode(self, password):
172
# Passphrase can not be empty and can not contain newlines or
173
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
175
176
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
191
return ciphertext
192
193
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
208
return decrypted_plaintext
209
210
98
211
99
212
class AvahiError(Exception):
100
213
def __init__(self, value, *args, **kwargs):
116
229
Attributes:
117
230
interface: integer; avahi.IF_UNSPEC or an interface index.
118
231
Used to optionally bind to the specified interface.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
232
name: string; Example: 'Mandos'
233
type: string; Example: '_mandos._tcp'.
121
234
See <http://www.dns-sd.org/ServiceTypes.html>
122
235
port: integer; what port to announce
123
236
TXT: list of strings; TXT record for the service
132
245
"""
133
246
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
134
247
servicetype = None, port = None, TXT = None,
135
domain = u"", host = u"", max_renames = 32768,
248
domain = "", host = "", max_renames = 32768,
136
249
protocol = avahi.PROTO_UNSPEC, bus = None):
137
250
self.interface = interface
138
251
self.name = name
147
260
self.group = None # our entry group
148
261
self.server = None
149
262
self.bus = bus
263
self.entry_group_state_changed_match = None
150
264
def rename(self):
151
265
"""Derived from the Avahi example code"""
152
266
if self.rename_count >= self.max_renames:
153
logger.critical(u"No suitable Zeroconf service name found"
154
u" after %i retries, exiting.",
267
logger.critical("No suitable Zeroconf service name found"
268
" after %i retries, exiting.",
155
269
self.rename_count)
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
158
logger.info(u"Changing Zeroconf service name to %r ...",
159
unicode(self.name))
160
syslogger.setFormatter(logging.Formatter
161
(u'Mandos (%s) [%%(process)d]:'
162
u' %%(levelname)s: %%(message)s'
163
% self.name))
270
raise AvahiServiceError("Too many renames")
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
273
logger.info("Changing Zeroconf service name to %r ...",
274
self.name)
164
275
self.remove()
165
self.add()
276
try:
277
self.add()
278
except dbus.exceptions.DBusException as error:
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
166
282
self.rename_count += 1
167
283
def remove(self):
168
284
"""Derived from the Avahi example code"""
285
if self.entry_group_state_changed_match is not None:
286
self.entry_group_state_changed_match.remove()
287
self.entry_group_state_changed_match = None
169
288
if self.group is not None:
170
289
self.group.Reset()
171
290
def add(self):
172
291
"""Derived from the Avahi example code"""
292
self.remove()
173
293
if self.group is None:
174
294
self.group = dbus.Interface(
175
295
self.bus.get_object(avahi.DBUS_NAME,
176
296
self.server.EntryGroupNew()),
177
297
avahi.DBUS_INTERFACE_ENTRY_GROUP)
178
self.group.connect_to_signal('StateChanged',
179
self
180
.entry_group_state_changed)
181
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
298
self.entry_group_state_changed_match = (
299
self.group.connect_to_signal(
300
'StateChanged', self.entry_group_state_changed))
301
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
182
302
self.name, self.type)
183
303
self.group.AddService(
184
304
self.interface,
191
311
self.group.Commit()
192
312
def entry_group_state_changed(self, state, error):
193
313
"""Derived from the Avahi example code"""
194
logger.debug(u"Avahi state change: %i", state)
314
logger.debug("Avahi entry group state change: %i", state)
195
315
196
316
if state == avahi.ENTRY_GROUP_ESTABLISHED:
197
logger.debug(u"Zeroconf service established.")
317
logger.debug("Zeroconf service established.")
198
318
elif state == avahi.ENTRY_GROUP_COLLISION:
199
logger.warning(u"Zeroconf service name collision.")
319
logger.info("Zeroconf service name collision.")
200
320
self.rename()
201
321
elif state == avahi.ENTRY_GROUP_FAILURE:
202
logger.critical(u"Avahi: Error in group state changed %s",
322
logger.critical("Avahi: Error in group state changed %s",
203
323
unicode(error))
204
raise AvahiGroupError(u"State changed: %s"
324
raise AvahiGroupError("State changed: %s"
205
325
% unicode(error))
206
326
def cleanup(self):
207
327
"""Derived from the Avahi example code"""
208
328
if self.group is not None:
209
self.group.Free()
329
try:
330
self.group.Free()
331
except (dbus.exceptions.UnknownMethodException,
332
dbus.exceptions.DBusException):
333
pass
210
334
self.group = None
211
def server_state_changed(self, state):
335
self.remove()
336
def server_state_changed(self, state, error=None):
212
337
"""Derived from the Avahi example code"""
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
215
self.remove()
338
logger.debug("Avahi server state change: %i", state)
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"Zeroconf server failure" }
346
if state in bad_states:
347
if bad_states[state] is not None:
348
if error is None:
349
logger.error(bad_states[state])
350
else:
351
logger.error(bad_states[state] + ": %r", error)
352
self.cleanup()
216
353
elif state == avahi.SERVER_RUNNING:
217
354
self.add()
355
else:
356
if error is None:
357
logger.debug("Unknown state: %r", state)
358
else:
359
logger.debug("Unknown state: %r: %r", state, error)
218
360
def activate(self):
219
361
"""Derived from the Avahi example code"""
220
362
if self.server is None:
221
363
self.server = dbus.Interface(
222
364
self.bus.get_object(avahi.DBUS_NAME,
223
avahi.DBUS_PATH_SERVER),
365
avahi.DBUS_PATH_SERVER,
366
follow_name_owner_changes=True),
224
367
avahi.DBUS_INTERFACE_SERVER)
225
self.server.connect_to_signal(u"StateChanged",
368
self.server.connect_to_signal("StateChanged",
226
369
self.server_state_changed)
227
370
self.server_state_changed(self.server.GetState())
228
371
372
class AvahiServiceToSyslog(AvahiService):
373
def rename(self):
374
"""Add the new name to the syslog messages"""
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
380
return ret
229
381
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
387
230
388
class Client(object):
231
389
"""A representation of a client host served by this server.
232
390
233
391
Attributes:
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
236
fingerprint: string (40 or 32 hexadecimal digits); used to
237
uniquely identify the client
238
secret: bytestring; sent verbatim (over TLS) to client
239
host: string; available for use by the checker command
240
created: datetime.datetime(); (UTC) object creation
241
last_enabled: datetime.datetime(); (UTC)
242
enabled: bool()
243
last_checked_ok: datetime.datetime(); (UTC) or None
244
timeout: datetime.timedelta(); How long from last_checked_ok
245
until this client is invalid
246
interval: datetime.timedelta(); How often to start a new checker
247
disable_hook: If set, called by disable() as disable_hook(self)
392
approved: bool(); 'None' if not yet approved/disapproved
393
approval_delay: datetime.timedelta(); Time to wait for approval
394
approval_duration: datetime.timedelta(); Duration of one approval
248
395
checker: subprocess.Popen(); a running checker process used
249
396
to see if the client lives.
250
397
'None' if no process is running.
251
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
253
checker_callback_tag: - '' -
254
checker_command: string; External command which is run to check if
255
client lives. %() expansions are done at
398
checker_callback_tag: a gobject event source tag, or None
399
checker_command: string; External command which is run to check
400
if client lives. %() expansions are done at
256
401
runtime with vars(self) as dict, so that for
257
402
instance %(name)s can be used in the command.
403
checker_initiator_tag: a gobject event source tag, or None
404
created: datetime.datetime(); (UTC) object creation
405
client_structure: Object describing what attributes a client has
406
and is used for storing the client at exit
258
407
current_checker_command: string; current running checker_command
408
disable_initiator_tag: a gobject event source tag, or None
409
enabled: bool()
410
fingerprint: string (40 or 32 hexadecimal digits); used to
411
uniquely identify the client
412
host: string; available for use by the checker command
413
interval: datetime.timedelta(); How often to start a new checker
414
last_approval_request: datetime.datetime(); (UTC) or None
415
last_checked_ok: datetime.datetime(); (UTC) or None
416
last_checker_status: integer between 0 and 255 reflecting exit
417
status of last checker. -1 reflects crashed
418
checker, -2 means no checker completed yet.
419
last_enabled: datetime.datetime(); (UTC) or None
420
name: string; from the config file, used in log messages and
421
D-Bus identifiers
422
secret: bytestring; sent verbatim (over TLS) to client
423
timeout: datetime.timedelta(); How long from last_checked_ok
424
until this client is disabled
425
extended_timeout: extra long timeout when secret has been sent
426
runtime_expansions: Allowed attributes for runtime expansion.
427
expires: datetime.datetime(); time (UTC) when a client will be
428
disabled, or None
259
429
"""
260
430
261
@staticmethod
262
def _timedelta_to_milliseconds(td):
263
"Convert a datetime.timedelta() to milliseconds"
264
return ((td.days * 24 * 60 * 60 * 1000)
265
+ (td.seconds * 1000)
266
+ (td.microseconds // 1000))
431
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
434
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
267
445
268
446
def timeout_milliseconds(self):
269
447
"Return the 'timeout' attribute in milliseconds"
270
return self._timedelta_to_milliseconds(self.timeout)
448
return timedelta_to_milliseconds(self.timeout)
449
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
271
453
272
454
def interval_milliseconds(self):
273
455
"Return the 'interval' attribute in milliseconds"
274
return self._timedelta_to_milliseconds(self.interval)
456
return timedelta_to_milliseconds(self.interval)
275
457
276
def __init__(self, name = None, disable_hook=None, config=None):
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
460
461
@staticmethod
462
def config_parser(config):
463
"""Construct a new dict of client settings of this form:
464
{ client_name: {setting_name: value, ...}, ...}
465
with exceptions for any special settings as defined above.
466
NOTE: Must be a pure function. Must return the same result
467
value given the same arguments.
468
"""
469
settings = {}
470
for client_name in config.sections():
471
section = dict(config.items(client_name))
472
client = settings[client_name] = {}
473
474
client["host"] = section["host"]
475
# Reformat values from string types to Python types
476
client["approved_by_default"] = config.getboolean(
477
client_name, "approved_by_default")
478
client["enabled"] = config.getboolean(client_name,
479
"enabled")
480
481
client["fingerprint"] = (section["fingerprint"].upper()
482
.replace(" ", ""))
483
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
485
elif "secfile" in section:
486
with open(os.path.expanduser(os.path.expandvars
487
(section["secfile"])),
488
"rb") as secfile:
489
client["secret"] = secfile.read()
490
else:
491
raise TypeError("No secret or secfile for section %s"
492
% section)
493
client["timeout"] = string_to_delta(section["timeout"])
494
client["extended_timeout"] = string_to_delta(
495
section["extended_timeout"])
496
client["interval"] = string_to_delta(section["interval"])
497
client["approval_delay"] = string_to_delta(
498
section["approval_delay"])
499
client["approval_duration"] = string_to_delta(
500
section["approval_duration"])
501
client["checker_command"] = section["checker"]
502
client["last_approval_request"] = None
503
client["last_checked_ok"] = None
504
client["last_checker_status"] = -2
505
506
return settings
507
508
509
def __init__(self, settings, name = None):
277
510
"""Note: the 'checker' key in 'config' sets the
278
511
'checker_command' attribute and *not* the 'checker'
279
512
attribute."""
280
513
self.name = name
281
if config is None:
282
config = {}
283
logger.debug(u"Creating client %r", self.name)
514
# adding all client settings
515
for setting, value in settings.iteritems():
516
setattr(self, setting, value)
517
518
if self.enabled:
519
if not hasattr(self, "last_enabled"):
520
self.last_enabled = datetime.datetime.utcnow()
521
if not hasattr(self, "expires"):
522
self.expires = (datetime.datetime.utcnow()
523
+ self.timeout)
524
else:
525
self.last_enabled = None
526
self.expires = None
527
528
logger.debug("Creating client %r", self.name)
284
529
# Uppercase and remove spaces from fingerprint for later
285
530
# comparison purposes with return value from the fingerprint()
286
531
# function
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
289
logger.debug(u" Fingerprint: %s", self.fingerprint)
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
294
(os.path.expandvars
295
(config[u"secfile"])),
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
532
logger.debug(" Fingerprint: %s", self.fingerprint)
533
self.created = settings.get("created",
534
datetime.datetime.utcnow())
535
536
# attributes specific for this server instance
309
537
self.checker = None
310
538
self.checker_initiator_tag = None
311
539
self.disable_initiator_tag = None
312
540
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
314
541
self.current_checker_command = None
315
self.last_connect = None
542
self.approved = None
543
self.approvals_pending = 0
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
549
if not attr.startswith("_")]
550
self.client_structure.append("client_structure")
551
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
556
if not name.startswith("_"):
557
self.client_structure.append(name)
558
559
# Send notice to process children that client state has changed
560
def send_changedstate(self):
561
with self.changedstate:
562
self.changedstate.notify_all()
316
563
317
564
def enable(self):
318
565
"""Start this client's checker and timeout hooks"""
319
if getattr(self, u"enabled", False):
566
if getattr(self, "enabled", False):
320
567
# Already enabled
321
568
return
569
self.send_changedstate()
570
self.expires = datetime.datetime.utcnow() + self.timeout
571
self.enabled = True
322
572
self.last_enabled = datetime.datetime.utcnow()
573
self.init_checker()
574
575
def disable(self, quiet=True):
576
"""Disable this client."""
577
if not getattr(self, "enabled", False):
578
return False
579
if not quiet:
580
self.send_changedstate()
581
if not quiet:
582
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
584
gobject.source_remove(self.disable_initiator_tag)
585
self.disable_initiator_tag = None
586
self.expires = None
587
if getattr(self, "checker_initiator_tag", False):
588
gobject.source_remove(self.checker_initiator_tag)
589
self.checker_initiator_tag = None
590
self.stop_checker()
591
self.enabled = False
592
# Do not run this again if called by a gobject.timeout_add
593
return False
594
595
def __del__(self):
596
self.disable()
597
598
def init_checker(self):
323
599
# Schedule a new checker to be started an 'interval' from now,
324
600
# and every interval from then on.
325
601
self.checker_initiator_tag = (gobject.timeout_add
326
602
(self.interval_milliseconds(),
327
603
self.start_checker))
328
# Also start a new checker *right now*.
329
self.start_checker()
330
604
# Schedule a disable() when 'timeout' has passed
331
605
self.disable_initiator_tag = (gobject.timeout_add
332
606
(self.timeout_milliseconds(),
333
607
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()
608
# Also start a new checker *right now*.
609
self.start_checker()
357
610
358
611
def checker_callback(self, pid, condition, command):
359
612
"""The checker has completed, so take appropriate actions."""
360
613
self.checker_callback_tag = None
361
614
self.checker = None
362
615
if os.WIFEXITED(condition):
363
exitstatus = os.WEXITSTATUS(condition)
364
if exitstatus == 0:
365
logger.info(u"Checker for %(name)s succeeded",
616
self.last_checker_status = os.WEXITSTATUS(condition)
617
if self.last_checker_status == 0:
618
logger.info("Checker for %(name)s succeeded",
366
619
vars(self))
367
620
self.checked_ok()
368
621
else:
369
logger.info(u"Checker for %(name)s failed",
622
logger.info("Checker for %(name)s failed",
370
623
vars(self))
371
624
else:
372
logger.warning(u"Checker for %(name)s crashed?",
625
self.last_checker_status = -1
626
logger.warning("Checker for %(name)s crashed?",
373
627
vars(self))
374
628
375
629
def checked_ok(self):
376
"""Bump up the timeout for this client.
377
378
This should only be called when the client has been seen,
379
alive and well.
380
"""
630
"""Assert that the client has been seen, alive and well."""
381
631
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))
632
self.last_checker_status = 0
633
self.bump_timeout()
634
635
def bump_timeout(self, timeout=None):
636
"""Bump up the timeout for this client."""
637
if timeout is None:
638
timeout = self.timeout
639
if self.disable_initiator_tag is not None:
640
gobject.source_remove(self.disable_initiator_tag)
641
if getattr(self, "enabled", False):
642
self.disable_initiator_tag = (gobject.timeout_add
643
(timedelta_to_milliseconds
644
(timeout), self.disable))
645
self.expires = datetime.datetime.utcnow() + timeout
646
647
def need_approval(self):
648
self.last_approval_request = datetime.datetime.utcnow()
386
649
387
650
def start_checker(self):
388
651
"""Start a new checker subprocess if one is not running.
395
658
# client would inevitably timeout, since no checker would get
396
659
# a chance to run to completion. If we instead leave running
397
660
# 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.
661
# than 'timeout' for the client to be disabled, which is as it
662
# should be.
400
663
401
664
# If a checker exists, make sure it is not a zombie
402
665
try:
403
666
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
404
except (AttributeError, OSError), error:
667
except (AttributeError, OSError) as error:
405
668
if (isinstance(error, OSError)
406
669
and error.errno != errno.ECHILD):
407
670
raise error
408
671
else:
409
672
if pid:
410
logger.warning(u"Checker was a zombie")
673
logger.warning("Checker was a zombie")
411
674
gobject.source_remove(self.checker_callback_tag)
412
675
self.checker_callback(pid, status,
413
676
self.current_checker_command)
418
681
command = self.checker_command % self.host
419
682
except TypeError:
420
683
# 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())
684
escaped_attrs = dict(
685
(attr,
686
re.escape(unicode(str(getattr(self, attr, "")),
687
errors=
688
'replace')))
689
for attr in
690
self.runtime_expansions)
691
427
692
try:
428
693
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)
694
except TypeError as error:
695
logger.error('Could not format string "%s":'
696
' %s', self.checker_command, error)
432
697
return True # Try again later
433
698
self.current_checker_command = command
434
699
try:
435
logger.info(u"Starting checker %r for %s",
700
logger.info("Starting checker %r for %s",
436
701
command, self.name)
437
702
# We don't need to redirect stdout and stderr, since
438
703
# in normal mode, that is already done by daemon(),
440
705
# always replaced by /dev/null.)
441
706
self.checker = subprocess.Popen(command,
442
707
close_fds=True,
443
shell=True, cwd=u"/")
708
shell=True, cwd="/")
444
709
self.checker_callback_tag = (gobject.child_watch_add
445
710
(self.checker.pid,
446
711
self.checker_callback,
451
716
if pid:
452
717
gobject.source_remove(self.checker_callback_tag)
453
718
self.checker_callback(pid, status, command)
454
except OSError, error:
455
logger.error(u"Failed to start subprocess: %s",
719
except OSError as error:
720
logger.error("Failed to start subprocess: %s",
456
721
error)
457
722
# Re-run this periodically if run by gobject.timeout_add
458
723
return True
462
727
if self.checker_callback_tag:
463
728
gobject.source_remove(self.checker_callback_tag)
464
729
self.checker_callback_tag = None
465
if getattr(self, u"checker", None) is None:
730
if getattr(self, "checker", None) is None:
466
731
return
467
logger.debug(u"Stopping checker for %(name)s", vars(self))
732
logger.debug("Stopping checker for %(name)s", vars(self))
468
733
try:
469
734
os.kill(self.checker.pid, signal.SIGTERM)
470
#os.sleep(0.5)
735
#time.sleep(0.5)
471
736
#if self.checker.poll() is None:
472
737
# os.kill(self.checker.pid, signal.SIGKILL)
473
except OSError, error:
738
except OSError as error:
474
739
if error.errno != errno.ESRCH: # No such process
475
740
raise
476
741
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):
742
743
744
def dbus_service_property(dbus_interface, signature="v",
745
access="readwrite", byte_arrays=False):
491
746
"""Decorators for marking methods of a DBusObjectWithProperties to
492
747
become properties on the D-Bus.
493
748
498
753
dbus.service.method, except there is only "signature", since the
499
754
type from Get() and the type sent to Set() is the same.
500
755
"""
756
# Encoding deeply encoded byte arrays is not supported yet by the
757
# "Set" method, so we fail early here:
758
if byte_arrays and signature != "ay":
759
raise ValueError("Byte arrays not supported for non-'ay'"
760
" signature %r" % signature)
501
761
def decorator(func):
502
762
func._dbus_is_property = True
503
763
func._dbus_interface = dbus_interface
504
764
func._dbus_signature = signature
505
765
func._dbus_access = access
506
766
func._dbus_name = func.__name__
507
if func._dbus_name.endswith(u"_dbus_property"):
767
if func._dbus_name.endswith("_dbus_property"):
508
768
func._dbus_name = func._dbus_name[:-14]
509
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
769
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
510
770
return func
511
771
return decorator
512
772
532
792
533
793
class DBusObjectWithProperties(dbus.service.Object):
534
794
"""A D-Bus object with properties.
535
795
536
796
Classes inheriting from this can use the dbus_service_property
537
797
decorator to expose methods as D-Bus properties. It exposes the
538
798
standard Get(), Set(), and GetAll() methods on the D-Bus.
540
800
541
801
@staticmethod
542
802
def _is_dbus_property(obj):
543
return getattr(obj, u"_dbus_is_property", False)
803
return getattr(obj, "_dbus_is_property", False)
544
804
545
805
def _get_all_dbus_properties(self):
546
806
"""Returns a generator of (name, attribute) pairs
547
807
"""
548
return ((prop._dbus_name, prop)
808
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
809
for cls in self.__class__.__mro__
549
810
for name, prop in
550
inspect.getmembers(self, self._is_dbus_property))
811
inspect.getmembers(cls, self._is_dbus_property))
551
812
552
813
def _get_dbus_property(self, interface_name, property_name):
553
814
"""Returns a bound method if one exists which is a D-Bus
554
815
property with the specified name and interface.
555
816
"""
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
817
for cls in self.__class__.__mro__:
818
for name, value in (inspect.getmembers
819
(cls, self._is_dbus_property)):
820
if (value._dbus_name == property_name
821
and value._dbus_interface == interface_name):
822
return value.__get__(self)
823
566
824
# No such property
567
raise DBusPropertyNotFound(self.dbus_object_path + u":"
568
+ interface_name + u"."
825
raise DBusPropertyNotFound(self.dbus_object_path + ":"
826
+ interface_name + "."
569
827
+ property_name)
570
828
571
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
572
out_signature=u"v")
829
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
830
out_signature="v")
573
831
def Get(self, interface_name, property_name):
574
832
"""Standard D-Bus property Get() method, see D-Bus standard.
575
833
"""
576
834
prop = self._get_dbus_property(interface_name, property_name)
577
if prop._dbus_access == u"write":
835
if prop._dbus_access == "write":
578
836
raise DBusPropertyAccessException(property_name)
579
837
value = prop()
580
if not hasattr(value, u"variant_level"):
838
if not hasattr(value, "variant_level"):
581
839
return value
582
840
return type(value)(value, variant_level=value.variant_level+1)
583
841
584
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
842
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
585
843
def Set(self, interface_name, property_name, value):
586
844
"""Standard D-Bus property Set() method, see D-Bus standard.
587
845
"""
588
846
prop = self._get_dbus_property(interface_name, property_name)
589
if prop._dbus_access == u"read":
847
if prop._dbus_access == "read":
590
848
raise DBusPropertyAccessException(property_name)
591
if prop._dbus_get_args_options[u"byte_arrays"]:
592
value = dbus.ByteArray(''.join(unichr(byte)
593
for byte in value))
849
if prop._dbus_get_args_options["byte_arrays"]:
850
# The byte_arrays option is not supported yet on
851
# signatures other than "ay".
852
if prop._dbus_signature != "ay":
853
raise ValueError
854
value = dbus.ByteArray(b''.join(chr(byte)
855
for byte in value))
594
856
prop(value)
595
857
596
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
597
out_signature=u"a{sv}")
858
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
859
out_signature="a{sv}")
598
860
def GetAll(self, interface_name):
599
861
"""Standard D-Bus property GetAll() method, see D-Bus
600
862
standard.
601
863
602
864
Note: Will not include properties with access="write".
603
865
"""
604
all = {}
866
properties = {}
605
867
for name, prop in self._get_all_dbus_properties():
606
868
if (interface_name
607
869
and interface_name != prop._dbus_interface):
608
870
# Interface non-empty but did not match
609
871
continue
610
872
# Ignore write-only properties
611
if prop._dbus_access == u"write":
873
if prop._dbus_access == "write":
612
874
continue
613
875
value = prop()
614
if not hasattr(value, u"variant_level"):
615
all[name] = value
876
if not hasattr(value, "variant_level"):
877
properties[name] = value
616
878
continue
617
all[name] = type(value)(value, variant_level=
618
value.variant_level+1)
619
return dbus.Dictionary(all, signature=u"sv")
879
properties[name] = type(value)(value, variant_level=
880
value.variant_level+1)
881
return dbus.Dictionary(properties, signature="sv")
620
882
621
883
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
622
out_signature=u"s",
884
out_signature="s",
623
885
path_keyword='object_path',
624
886
connection_keyword='connection')
625
887
def Introspect(self, object_path, connection):
630
892
try:
631
893
document = xml.dom.minidom.parseString(xmlstring)
632
894
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)
895
e = document.createElement("property")
896
e.setAttribute("name", name)
897
e.setAttribute("type", prop._dbus_signature)
898
e.setAttribute("access", prop._dbus_access)
637
899
return e
638
for if_tag in document.getElementsByTagName(u"interface"):
900
for if_tag in document.getElementsByTagName("interface"):
639
901
for tag in (make_tag(document, name, prop)
640
902
for name, prop
641
903
in self._get_all_dbus_properties()
642
904
if prop._dbus_interface
643
== if_tag.getAttribute(u"name")):
905
== if_tag.getAttribute("name")):
644
906
if_tag.appendChild(tag)
645
907
# Add the names to the return values for the
646
908
# "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")
909
if (if_tag.getAttribute("name")
910
== "org.freedesktop.DBus.Properties"):
911
for cn in if_tag.getElementsByTagName("method"):
912
if cn.getAttribute("name") == "Get":
913
for arg in cn.getElementsByTagName("arg"):
914
if (arg.getAttribute("direction")
915
== "out"):
916
arg.setAttribute("name", "value")
917
elif cn.getAttribute("name") == "GetAll":
918
for arg in cn.getElementsByTagName("arg"):
919
if (arg.getAttribute("direction")
920
== "out"):
921
arg.setAttribute("name", "props")
922
xmlstring = document.toxml("utf-8")
661
923
document.unlink()
662
924
except (AttributeError, xml.dom.DOMException,
663
xml.parsers.expat.ExpatError), error:
664
logger.error(u"Failed to override Introspection method",
925
xml.parsers.expat.ExpatError) as error:
926
logger.error("Failed to override Introspection method",
665
927
error)
666
928
return xmlstring
667
929
668
930
931
def datetime_to_dbus (dt, variant_level=0):
932
"""Convert a UTC datetime.datetime() to a D-Bus type."""
933
if dt is None:
934
return dbus.String("", variant_level = variant_level)
935
return dbus.String(dt.isoformat(),
936
variant_level=variant_level)
937
938
939
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
940
.__metaclass__):
941
"""Applied to an empty subclass of a D-Bus object, this metaclass
942
will add additional D-Bus attributes matching a certain pattern.
943
"""
944
def __new__(mcs, name, bases, attr):
945
# Go through all the base classes which could have D-Bus
946
# methods, signals, or properties in them
947
for base in (b for b in bases
948
if issubclass(b, dbus.service.Object)):
949
# Go though all attributes of the base class
950
for attrname, attribute in inspect.getmembers(base):
951
# Ignore non-D-Bus attributes, and D-Bus attributes
952
# with the wrong interface name
953
if (not hasattr(attribute, "_dbus_interface")
954
or not attribute._dbus_interface
955
.startswith("se.recompile.Mandos")):
956
continue
957
# Create an alternate D-Bus interface name based on
958
# the current name
959
alt_interface = (attribute._dbus_interface
960
.replace("se.recompile.Mandos",
961
"se.bsnet.fukt.Mandos"))
962
# Is this a D-Bus signal?
963
if getattr(attribute, "_dbus_is_signal", False):
964
# Extract the original non-method function by
965
# black magic
966
nonmethod_func = (dict(
967
zip(attribute.func_code.co_freevars,
968
attribute.__closure__))["func"]
969
.cell_contents)
970
# Create a new, but exactly alike, function
971
# object, and decorate it to be a new D-Bus signal
972
# with the alternate D-Bus interface name
973
new_function = (dbus.service.signal
974
(alt_interface,
975
attribute._dbus_signature)
976
(types.FunctionType(
977
nonmethod_func.func_code,
978
nonmethod_func.func_globals,
979
nonmethod_func.func_name,
980
nonmethod_func.func_defaults,
981
nonmethod_func.func_closure)))
982
# Define a creator of a function to call both the
983
# old and new functions, so both the old and new
984
# signals gets sent when the function is called
985
def fixscope(func1, func2):
986
"""This function is a scope container to pass
987
func1 and func2 to the "call_both" function
988
outside of its arguments"""
989
def call_both(*args, **kwargs):
990
"""This function will emit two D-Bus
991
signals by calling func1 and func2"""
992
func1(*args, **kwargs)
993
func2(*args, **kwargs)
994
return call_both
995
# Create the "call_both" function and add it to
996
# the class
997
attr[attrname] = fixscope(attribute,
998
new_function)
999
# Is this a D-Bus method?
1000
elif getattr(attribute, "_dbus_is_method", False):
1001
# Create a new, but exactly alike, function
1002
# object. Decorate it to be a new D-Bus method
1003
# with the alternate D-Bus interface name. Add it
1004
# to the class.
1005
attr[attrname] = (dbus.service.method
1006
(alt_interface,
1007
attribute._dbus_in_signature,
1008
attribute._dbus_out_signature)
1009
(types.FunctionType
1010
(attribute.func_code,
1011
attribute.func_globals,
1012
attribute.func_name,
1013
attribute.func_defaults,
1014
attribute.func_closure)))
1015
# Is this a D-Bus property?
1016
elif getattr(attribute, "_dbus_is_property", False):
1017
# Create a new, but exactly alike, function
1018
# object, and decorate it to be a new D-Bus
1019
# property with the alternate D-Bus interface
1020
# name. Add it to the class.
1021
attr[attrname] = (dbus_service_property
1022
(alt_interface,
1023
attribute._dbus_signature,
1024
attribute._dbus_access,
1025
attribute
1026
._dbus_get_args_options
1027
["byte_arrays"])
1028
(types.FunctionType
1029
(attribute.func_code,
1030
attribute.func_globals,
1031
attribute.func_name,
1032
attribute.func_defaults,
1033
attribute.func_closure)))
1034
return type.__new__(mcs, name, bases, attr)
1035
1036
669
1037
class ClientDBus(Client, DBusObjectWithProperties):
670
1038
"""A Client class using D-Bus
671
1039
673
1041
dbus_object_path: dbus.ObjectPath
674
1042
bus: dbus.SystemBus()
675
1043
"""
1044
1045
runtime_expansions = (Client.runtime_expansions
1046
+ ("dbus_object_path",))
1047
676
1048
# dbus.service.Object doesn't use super(), so we can't either.
677
1049
678
1050
def __init__(self, bus = None, *args, **kwargs):
680
1052
Client.__init__(self, *args, **kwargs)
681
1053
# Only now, when this client is initialized, can it show up on
682
1054
# the D-Bus
1055
client_object_name = unicode(self.name).translate(
1056
{ord("."): ord("_"),
1057
ord("-"): ord("_")})
683
1058
self.dbus_object_path = (dbus.ObjectPath
684
(u"/clients/"
685
+ self.name.replace(u".", u"_")))
1059
("/clients/" + client_object_name))
686
1060
DBusObjectWithProperties.__init__(self, self.bus,
687
1061
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
1062
1063
def notifychangeproperty(transform_func,
1064
dbus_name, type_func=lambda x: x,
1065
variant_level=1):
1066
""" Modify a variable so that it's a property which announces
1067
its changes to DBus.
1068
1069
transform_fun: Function that takes a value and a variant_level
1070
and transforms it to a D-Bus type.
1071
dbus_name: D-Bus name of the variable
1072
type_func: Function that transform the value before sending it
1073
to the D-Bus. Default: no transform
1074
variant_level: D-Bus variant level. Default: 1
1075
"""
1076
attrname = "_{0}".format(dbus_name)
1077
def setter(self, value):
1078
if hasattr(self, "dbus_object_path"):
1079
if (not hasattr(self, attrname) or
1080
type_func(getattr(self, attrname, None))
1081
!= type_func(value)):
1082
dbus_value = transform_func(type_func(value),
1083
variant_level
1084
=variant_level)
1085
self.PropertyChanged(dbus.String(dbus_name),
1086
dbus_value)
1087
setattr(self, attrname, value)
1088
1089
return property(lambda self: getattr(self, attrname), setter)
1090
1091
1092
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1093
approvals_pending = notifychangeproperty(dbus.Boolean,
1094
"ApprovalPending",
1095
type_func = bool)
1096
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1097
last_enabled = notifychangeproperty(datetime_to_dbus,
1098
"LastEnabled")
1099
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1100
type_func = lambda checker:
1101
checker is not None)
1102
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1103
"LastCheckedOK")
1104
last_checker_status = notifychangeproperty(dbus.Int16,
1105
"LastCheckerStatus")
1106
last_approval_request = notifychangeproperty(
1107
datetime_to_dbus, "LastApprovalRequest")
1108
approved_by_default = notifychangeproperty(dbus.Boolean,
1109
"ApprovedByDefault")
1110
approval_delay = notifychangeproperty(dbus.UInt64,
1111
"ApprovalDelay",
1112
type_func =
1113
timedelta_to_milliseconds)
1114
approval_duration = notifychangeproperty(
1115
dbus.UInt64, "ApprovalDuration",
1116
type_func = timedelta_to_milliseconds)
1117
host = notifychangeproperty(dbus.String, "Host")
1118
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1119
type_func =
1120
timedelta_to_milliseconds)
1121
extended_timeout = notifychangeproperty(
1122
dbus.UInt64, "ExtendedTimeout",
1123
type_func = timedelta_to_milliseconds)
1124
interval = notifychangeproperty(dbus.UInt64,
1125
"Interval",
1126
type_func =
1127
timedelta_to_milliseconds)
1128
checker_command = notifychangeproperty(dbus.String, "Checker")
1129
1130
del notifychangeproperty
716
1131
717
1132
def __del__(self, *args, **kwargs):
718
1133
try:
719
1134
self.remove_from_connection()
720
1135
except LookupError:
721
1136
pass
722
if hasattr(DBusObjectWithProperties, u"__del__"):
1137
if hasattr(DBusObjectWithProperties, "__del__"):
723
1138
DBusObjectWithProperties.__del__(self, *args, **kwargs)
724
1139
Client.__del__(self, *args, **kwargs)
725
1140
727
1142
*args, **kwargs):
728
1143
self.checker_callback_tag = None
729
1144
self.checker = None
730
# Emit D-Bus signal
731
self.PropertyChanged(dbus.String(u"checker_running"),
732
dbus.Boolean(False, variant_level=1))
733
1145
if os.WIFEXITED(condition):
734
1146
exitstatus = os.WEXITSTATUS(condition)
735
1147
# Emit D-Bus signal
745
1157
return Client.checker_callback(self, pid, condition, command,
746
1158
*args, **kwargs)
747
1159
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
1160
def start_checker(self, *args, **kwargs):
758
1161
old_checker = self.checker
759
1162
if self.checker is not None:
766
1169
and old_checker_pid != self.checker.pid):
767
1170
# Emit D-Bus signal
768
1171
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()
1172
return r
1173
1174
def _reset_approved(self):
1175
self.approved = None
1176
return False
1177
1178
def approve(self, value=True):
1179
self.send_changedstate()
1180
self.approved = value
1181
gobject.timeout_add(timedelta_to_milliseconds
1182
(self.approval_duration),
1183
self._reset_approved)
1184
1185
1186
## D-Bus methods, signals & properties
1187
_interface = "se.recompile.Mandos.Client"
1188
1189
## Signals
790
1190
791
1191
# CheckerCompleted - signal
792
@dbus.service.signal(_interface, signature=u"nxs")
1192
@dbus.service.signal(_interface, signature="nxs")
793
1193
def CheckerCompleted(self, exitcode, waitstatus, command):
794
1194
"D-Bus signal"
795
1195
pass
796
1196
797
1197
# CheckerStarted - signal
798
@dbus.service.signal(_interface, signature=u"s")
1198
@dbus.service.signal(_interface, signature="s")
799
1199
def CheckerStarted(self, command):
800
1200
"D-Bus signal"
801
1201
pass
802
1202
803
1203
# PropertyChanged - signal
804
@dbus.service.signal(_interface, signature=u"sv")
1204
@dbus.service.signal(_interface, signature="sv")
805
1205
def PropertyChanged(self, property, value):
806
1206
"D-Bus signal"
807
1207
pass
809
1209
# GotSecret - signal
810
1210
@dbus.service.signal(_interface)
811
1211
def GotSecret(self):
812
"D-Bus signal"
1212
"""D-Bus signal
1213
Is sent after a successful transfer of secret from the Mandos
1214
server to mandos-client
1215
"""
813
1216
pass
814
1217
815
1218
# Rejected - signal
816
@dbus.service.signal(_interface)
817
def Rejected(self):
1219
@dbus.service.signal(_interface, signature="s")
1220
def Rejected(self, reason):
818
1221
"D-Bus signal"
819
1222
pass
820
1223
1224
# NeedApproval - signal
1225
@dbus.service.signal(_interface, signature="tb")
1226
def NeedApproval(self, timeout, default):
1227
"D-Bus signal"
1228
return self.need_approval()
1229
1230
## Methods
1231
1232
# Approve - method
1233
@dbus.service.method(_interface, in_signature="b")
1234
def Approve(self, value):
1235
self.approve(value)
1236
1237
# CheckedOK - method
1238
@dbus.service.method(_interface)
1239
def CheckedOK(self):
1240
self.checked_ok()
1241
821
1242
# Enable - method
822
1243
@dbus.service.method(_interface)
823
1244
def Enable(self):
841
1262
def StopChecker(self):
842
1263
self.stop_checker()
843
1264
844
# name - property
845
@dbus_service_property(_interface, signature=u"s", access=u"read")
846
def name_dbus_property(self):
1265
## Properties
1266
1267
# ApprovalPending - property
1268
@dbus_service_property(_interface, signature="b", access="read")
1269
def ApprovalPending_dbus_property(self):
1270
return dbus.Boolean(bool(self.approvals_pending))
1271
1272
# ApprovedByDefault - property
1273
@dbus_service_property(_interface, signature="b",
1274
access="readwrite")
1275
def ApprovedByDefault_dbus_property(self, value=None):
1276
if value is None: # get
1277
return dbus.Boolean(self.approved_by_default)
1278
self.approved_by_default = bool(value)
1279
1280
# ApprovalDelay - property
1281
@dbus_service_property(_interface, signature="t",
1282
access="readwrite")
1283
def ApprovalDelay_dbus_property(self, value=None):
1284
if value is None: # get
1285
return dbus.UInt64(self.approval_delay_milliseconds())
1286
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1287
1288
# ApprovalDuration - property
1289
@dbus_service_property(_interface, signature="t",
1290
access="readwrite")
1291
def ApprovalDuration_dbus_property(self, value=None):
1292
if value is None: # get
1293
return dbus.UInt64(timedelta_to_milliseconds(
1294
self.approval_duration))
1295
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1296
1297
# Name - property
1298
@dbus_service_property(_interface, signature="s", access="read")
1299
def Name_dbus_property(self):
847
1300
return dbus.String(self.name)
848
1301
849
# fingerprint - property
850
@dbus_service_property(_interface, signature=u"s", access=u"read")
851
def fingerprint_dbus_property(self):
1302
# Fingerprint - property
1303
@dbus_service_property(_interface, signature="s", access="read")
1304
def Fingerprint_dbus_property(self):
852
1305
return dbus.String(self.fingerprint)
853
1306
854
# host - property
855
@dbus_service_property(_interface, signature=u"s",
856
access=u"readwrite")
857
def host_dbus_property(self, value=None):
1307
# Host - property
1308
@dbus_service_property(_interface, signature="s",
1309
access="readwrite")
1310
def Host_dbus_property(self, value=None):
858
1311
if value is None: # get
859
1312
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):
1313
self.host = unicode(value)
1314
1315
# Created - property
1316
@dbus_service_property(_interface, signature="s", access="read")
1317
def Created_dbus_property(self):
1318
return datetime_to_dbus(self.created)
1319
1320
# LastEnabled - property
1321
@dbus_service_property(_interface, signature="s", access="read")
1322
def LastEnabled_dbus_property(self):
1323
return datetime_to_dbus(self.last_enabled)
1324
1325
# Enabled - property
1326
@dbus_service_property(_interface, signature="b",
1327
access="readwrite")
1328
def Enabled_dbus_property(self, value=None):
881
1329
if value is None: # get
882
1330
return dbus.Boolean(self.enabled)
883
1331
if value:
885
1333
else:
886
1334
self.disable()
887
1335
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):
1336
# LastCheckedOK - property
1337
@dbus_service_property(_interface, signature="s",
1338
access="readwrite")
1339
def LastCheckedOK_dbus_property(self, value=None):
892
1340
if value is not None:
893
1341
self.checked_ok()
894
1342
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):
1343
return datetime_to_dbus(self.last_checked_ok)
1344
1345
# LastCheckerStatus - property
1346
@dbus_service_property(_interface, signature="n",
1347
access="read")
1348
def LastCheckerStatus_dbus_property(self):
1349
return dbus.Int16(self.last_checker_status)
1350
1351
# Expires - property
1352
@dbus_service_property(_interface, signature="s", access="read")
1353
def Expires_dbus_property(self):
1354
return datetime_to_dbus(self.expires)
1355
1356
# LastApprovalRequest - property
1357
@dbus_service_property(_interface, signature="s", access="read")
1358
def LastApprovalRequest_dbus_property(self):
1359
return datetime_to_dbus(self.last_approval_request)
1360
1361
# Timeout - property
1362
@dbus_service_property(_interface, signature="t",
1363
access="readwrite")
1364
def Timeout_dbus_property(self, value=None):
904
1365
if value is None: # get
905
1366
return dbus.UInt64(self.timeout_milliseconds())
906
1367
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:
911
return
912
1368
# Reschedule timeout
913
gobject.source_remove(self.disable_initiator_tag)
914
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()))
921
if time_to_die <= 0:
922
# The timeout has passed
923
self.disable()
924
else:
925
self.disable_initiator_tag = (gobject.timeout_add
926
(time_to_die, self.disable))
927
928
# interval - property
929
@dbus_service_property(_interface, signature=u"t",
930
access=u"readwrite")
931
def interval_dbus_property(self, value=None):
1369
if self.enabled:
1370
now = datetime.datetime.utcnow()
1371
time_to_die = timedelta_to_milliseconds(
1372
(self.last_checked_ok + self.timeout) - now)
1373
if time_to_die <= 0:
1374
# The timeout has passed
1375
self.disable()
1376
else:
1377
self.expires = (now +
1378
datetime.timedelta(milliseconds =
1379
time_to_die))
1380
if (getattr(self, "disable_initiator_tag", None)
1381
is None):
1382
return
1383
gobject.source_remove(self.disable_initiator_tag)
1384
self.disable_initiator_tag = (gobject.timeout_add
1385
(time_to_die,
1386
self.disable))
1387
1388
# ExtendedTimeout - property
1389
@dbus_service_property(_interface, signature="t",
1390
access="readwrite")
1391
def ExtendedTimeout_dbus_property(self, value=None):
1392
if value is None: # get
1393
return dbus.UInt64(self.extended_timeout_milliseconds())
1394
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1395
1396
# Interval - property
1397
@dbus_service_property(_interface, signature="t",
1398
access="readwrite")
1399
def Interval_dbus_property(self, value=None):
932
1400
if value is None: # get
933
1401
return dbus.UInt64(self.interval_milliseconds())
934
1402
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:
1403
if getattr(self, "checker_initiator_tag", None) is None:
939
1404
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):
1405
if self.enabled:
1406
# Reschedule checker run
1407
gobject.source_remove(self.checker_initiator_tag)
1408
self.checker_initiator_tag = (gobject.timeout_add
1409
(value, self.start_checker))
1410
self.start_checker() # Start one now, too
1411
1412
# Checker - property
1413
@dbus_service_property(_interface, signature="s",
1414
access="readwrite")
1415
def Checker_dbus_property(self, value=None):
950
1416
if value is None: # get
951
1417
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))
1418
self.checker_command = unicode(value)
957
1419
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):
1420
# CheckerRunning - property
1421
@dbus_service_property(_interface, signature="b",
1422
access="readwrite")
1423
def CheckerRunning_dbus_property(self, value=None):
962
1424
if value is None: # get
963
1425
return dbus.Boolean(self.checker is not None)
964
1426
if value:
966
1428
else:
967
1429
self.stop_checker()
968
1430
969
# object_path - property
970
@dbus_service_property(_interface, signature=u"o", access=u"read")
971
def object_path_dbus_property(self):
1431
# ObjectPath - property
1432
@dbus_service_property(_interface, signature="o", access="read")
1433
def ObjectPath_dbus_property(self):
972
1434
return self.dbus_object_path # is already a dbus.ObjectPath
973
1435
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):
1436
# Secret = property
1437
@dbus_service_property(_interface, signature="ay",
1438
access="write", byte_arrays=True)
1439
def Secret_dbus_property(self, value):
978
1440
self.secret = str(value)
979
1441
980
1442
del _interface
981
1443
982
1444
1445
class ProxyClient(object):
1446
def __init__(self, child_pipe, fpr, address):
1447
self._pipe = child_pipe
1448
self._pipe.send(('init', fpr, address))
1449
if not self._pipe.recv():
1450
raise KeyError()
1451
1452
def __getattribute__(self, name):
1453
if name == '_pipe':
1454
return super(ProxyClient, self).__getattribute__(name)
1455
self._pipe.send(('getattr', name))
1456
data = self._pipe.recv()
1457
if data[0] == 'data':
1458
return data[1]
1459
if data[0] == 'function':
1460
def func(*args, **kwargs):
1461
self._pipe.send(('funcall', name, args, kwargs))
1462
return self._pipe.recv()[1]
1463
return func
1464
1465
def __setattr__(self, name, value):
1466
if name == '_pipe':
1467
return super(ProxyClient, self).__setattr__(name, value)
1468
self._pipe.send(('setattr', name, value))
1469
1470
1471
class ClientDBusTransitional(ClientDBus):
1472
__metaclass__ = AlternateDBusNamesMetaclass
1473
1474
983
1475
class ClientHandler(socketserver.BaseRequestHandler, object):
984
1476
"""A class to handle client connections.
985
1477
987
1479
Note: This will run in its own forked process."""
988
1480
989
1481
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:
1482
with contextlib.closing(self.server.child_pipe) as child_pipe:
1483
logger.info("TCP connection from: %s",
1484
unicode(self.client_address))
1485
logger.debug("Pipe FD: %d",
1486
self.server.child_pipe.fileno())
1487
995
1488
session = (gnutls.connection
996
1489
.ClientSession(self.request,
997
1490
gnutls.connection
998
1491
.X509Credentials()))
999
1492
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
1493
# Note: gnutls.connection.X509Credentials is really a
1010
1494
# generic GnuTLS certificate credentials object so long as
1011
1495
# no X.509 keys are added to it. Therefore, we can use it
1012
1496
# here despite using OpenPGP certificates.
1013
1497
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"))
1498
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1499
# "+AES-256-CBC", "+SHA1",
1500
# "+COMP-NULL", "+CTYPE-OPENPGP",
1501
# "+DHE-DSS"))
1018
1502
# Use a fallback default, since this MUST be set.
1019
1503
priority = self.server.gnutls_priority
1020
1504
if priority is None:
1021
priority = u"NORMAL"
1505
priority = "NORMAL"
1022
1506
(gnutls.library.functions
1023
1507
.gnutls_priority_set_direct(session._c_object,
1024
1508
priority, None))
1025
1509
1510
# Start communication using the Mandos protocol
1511
# Get protocol number
1512
line = self.request.makefile().readline()
1513
logger.debug("Protocol version: %r", line)
1514
try:
1515
if int(line.strip().split()[0]) > 1:
1516
raise RuntimeError
1517
except (ValueError, IndexError, RuntimeError) as error:
1518
logger.error("Unknown protocol version: %s", error)
1519
return
1520
1521
# Start GnuTLS connection
1026
1522
try:
1027
1523
session.handshake()
1028
except gnutls.errors.GNUTLSError, error:
1029
logger.warning(u"Handshake failed: %s", error)
1524
except gnutls.errors.GNUTLSError as error:
1525
logger.warning("Handshake failed: %s", error)
1030
1526
# Do not run session.bye() here: the session is not
1031
1527
# established. Just abandon the request.
1032
1528
return
1033
logger.debug(u"Handshake succeeded")
1529
logger.debug("Handshake succeeded")
1530
1531
approval_required = False
1034
1532
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)
1533
try:
1534
fpr = self.fingerprint(self.peer_certificate
1535
(session))
1536
except (TypeError,
1537
gnutls.errors.GNUTLSError) as error:
1538
logger.warning("Bad certificate: %s", error)
1539
return
1540
logger.debug("Fingerprint: %s", fpr)
1541
1542
try:
1543
client = ProxyClient(child_pipe, fpr,
1544
self.client_address)
1545
except KeyError:
1546
return
1547
1548
if client.approval_delay:
1549
delay = client.approval_delay
1550
client.approvals_pending += 1
1551
approval_required = True
1552
1553
while True:
1554
if not client.enabled:
1555
logger.info("Client %s is disabled",
1556
client.name)
1557
if self.server.use_dbus:
1558
# Emit D-Bus signal
1559
client.Rejected("Disabled")
1560
return
1561
1562
if client.approved or not client.approval_delay:
1563
#We are approved or approval is disabled
1564
break
1565
elif client.approved is None:
1566
logger.info("Client %s needs approval",
1567
client.name)
1568
if self.server.use_dbus:
1569
# Emit D-Bus signal
1570
client.NeedApproval(
1571
client.approval_delay_milliseconds(),
1572
client.approved_by_default)
1573
else:
1574
logger.warning("Client %s was not approved",
1575
client.name)
1576
if self.server.use_dbus:
1577
# Emit D-Bus signal
1578
client.Rejected("Denied")
1579
return
1580
1581
#wait until timeout or approved
1582
time = datetime.datetime.now()
1583
client.changedstate.acquire()
1584
(client.changedstate.wait
1585
(float(client.timedelta_to_milliseconds(delay)
1586
/ 1000)))
1587
client.changedstate.release()
1588
time2 = datetime.datetime.now()
1589
if (time2 - time) >= delay:
1590
if not client.approved_by_default:
1591
logger.warning("Client %s timed out while"
1592
" waiting for approval",
1593
client.name)
1594
if self.server.use_dbus:
1595
# Emit D-Bus signal
1596
client.Rejected("Approval timed out")
1597
return
1598
else:
1599
break
1600
else:
1601
delay -= time2 - time
1602
1603
sent_size = 0
1604
while sent_size < len(client.secret):
1605
try:
1606
sent = session.send(client.secret[sent_size:])
1607
except gnutls.errors.GNUTLSError as error:
1608
logger.warning("gnutls send failed")
1609
return
1610
logger.debug("Sent: %d, remaining: %d",
1611
sent, len(client.secret)
1612
- (sent_size + sent))
1613
sent_size += sent
1614
1615
logger.info("Sending secret to %s", client.name)
1616
# bump the timeout using extended_timeout
1617
client.bump_timeout(client.extended_timeout)
1618
if self.server.use_dbus:
1619
# Emit D-Bus signal
1620
client.GotSecret()
1041
1621
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()
1622
finally:
1623
if approval_required:
1624
client.approvals_pending -= 1
1625
try:
1626
session.bye()
1627
except gnutls.errors.GNUTLSError as error:
1628
logger.warning("GnuTLS bye failed")
1067
1629
1068
1630
@staticmethod
1069
1631
def peer_certificate(session):
1079
1641
.gnutls_certificate_get_peers
1080
1642
(session._c_object, ctypes.byref(list_size)))
1081
1643
if not bool(cert_list) and list_size.value != 0:
1082
raise gnutls.errors.GNUTLSError(u"error getting peer"
1083
u" certificate")
1644
raise gnutls.errors.GNUTLSError("error getting peer"
1645
" certificate")
1084
1646
if list_size.value == 0:
1085
1647
return None
1086
1648
cert = cert_list[0]
1112
1674
if crtverify.value != 0:
1113
1675
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1114
1676
raise (gnutls.errors.CertificateSecurityError
1115
(u"Verify failed"))
1677
("Verify failed"))
1116
1678
# New buffer for the fingerprint
1117
1679
buf = ctypes.create_string_buffer(20)
1118
1680
buf_len = ctypes.c_size_t()
1125
1687
# Convert the buffer to a Python bytestring
1126
1688
fpr = ctypes.string_at(buf, buf_len.value)
1127
1689
# Convert the bytestring to hexadecimal notation
1128
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1690
hex_fpr = binascii.hexlify(fpr).upper()
1129
1691
return hex_fpr
1130
1692
1131
1693
1132
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1133
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1694
class MultiprocessingMixIn(object):
1695
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1696
def sub_process_main(self, request, address):
1697
try:
1698
self.finish_request(request, address)
1699
except Exception:
1700
self.handle_error(request, address)
1701
self.close_request(request)
1702
1703
def process_request(self, request, address):
1704
"""Start a new process to process the request."""
1705
proc = multiprocessing.Process(target = self.sub_process_main,
1706
args = (request,
1707
address))
1708
proc.start()
1709
return proc
1710
1711
1712
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1713
""" adds a pipe to the MixIn """
1134
1714
def process_request(self, request, client_address):
1135
1715
"""Overrides and wraps the original process_request().
1136
1716
1137
1717
This function creates a new pipe in self.pipe
1138
1718
"""
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):
1719
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1720
1721
proc = MultiprocessingMixIn.process_request(self, request,
1722
client_address)
1723
self.child_pipe.close()
1724
self.add_pipe(parent_pipe, proc)
1725
1726
def add_pipe(self, parent_pipe, proc):
1145
1727
"""Dummy function; override as necessary"""
1146
os.close(pipe)
1147
1148
1149
class IPv6_TCPServer(ForkingMixInWithPipe,
1728
raise NotImplementedError
1729
1730
1731
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1150
1732
socketserver.TCPServer, object):
1151
1733
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1152
1734
1168
1750
bind to an address or port if they were not specified."""
1169
1751
if self.interface is not None:
1170
1752
if SO_BINDTODEVICE is None:
1171
logger.error(u"SO_BINDTODEVICE does not exist;"
1172
u" cannot bind to interface %s",
1753
logger.error("SO_BINDTODEVICE does not exist;"
1754
" cannot bind to interface %s",
1173
1755
self.interface)
1174
1756
else:
1175
1757
try:
1176
1758
self.socket.setsockopt(socket.SOL_SOCKET,
1177
1759
SO_BINDTODEVICE,
1178
1760
str(self.interface
1179
+ u'\0'))
1180
except socket.error, error:
1761
+ '\0'))
1762
except socket.error as error:
1181
1763
if error[0] == errno.EPERM:
1182
logger.error(u"No permission to"
1183
u" bind to interface %s",
1764
logger.error("No permission to"
1765
" bind to interface %s",
1184
1766
self.interface)
1185
1767
elif error[0] == errno.ENOPROTOOPT:
1186
logger.error(u"SO_BINDTODEVICE not available;"
1187
u" cannot bind to interface %s",
1768
logger.error("SO_BINDTODEVICE not available;"
1769
" cannot bind to interface %s",
1188
1770
self.interface)
1189
1771
else:
1190
1772
raise
1192
1774
if self.server_address[0] or self.server_address[1]:
1193
1775
if not self.server_address[0]:
1194
1776
if self.address_family == socket.AF_INET6:
1195
any_address = u"::" # in6addr_any
1777
any_address = "::" # in6addr_any
1196
1778
else:
1197
1779
any_address = socket.INADDR_ANY
1198
1780
self.server_address = (any_address,
1225
1807
self.enabled = False
1226
1808
self.clients = clients
1227
1809
if self.clients is None:
1228
self.clients = set()
1810
self.clients = {}
1229
1811
self.use_dbus = use_dbus
1230
1812
self.gnutls_priority = gnutls_priority
1231
1813
IPv6_TCPServer.__init__(self, server_address,
1235
1817
def server_activate(self):
1236
1818
if self.enabled:
1237
1819
return socketserver.TCPServer.server_activate(self)
1820
1238
1821
def enable(self):
1239
1822
self.enabled = True
1240
def add_pipe(self, pipe):
1823
1824
def add_pipe(self, parent_pipe, proc):
1241
1825
# 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={}):
1826
gobject.io_add_watch(parent_pipe.fileno(),
1827
gobject.IO_IN | gobject.IO_HUP,
1828
functools.partial(self.handle_ipc,
1829
parent_pipe =
1830
parent_pipe,
1831
proc = proc))
1832
1833
def handle_ipc(self, source, condition, parent_pipe=None,
1834
proc = None, client_object=None):
1245
1835
condition_names = {
1246
gobject.IO_IN: u"IN", # There is data to read.
1247
gobject.IO_OUT: u"OUT", # Data can be written (without
1836
gobject.IO_IN: "IN", # There is data to read.
1837
gobject.IO_OUT: "OUT", # Data can be written (without
1248
1838
# 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
1839
gobject.IO_PRI: "PRI", # There is urgent data to read.
1840
gobject.IO_ERR: "ERR", # Error condition.
1841
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1252
1842
# broken, usually for pipes and
1253
1843
# sockets).
1254
1844
}
1256
1846
for cond, name in
1257
1847
condition_names.iteritems()
1258
1848
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
1849
# error, or the other end of multiprocessing.Pipe has closed
1850
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1851
# Wait for other process to exit
1852
proc.join()
1853
return False
1854
1855
# Read a request from the child
1856
request = parent_pipe.recv()
1857
command = request[0]
1858
1859
if command == 'init':
1860
fpr = request[1]
1861
address = request[2]
1862
1863
for c in self.clients.itervalues():
1864
if c.fingerprint == fpr:
1865
client = c
1866
break
1867
else:
1868
logger.info("Client not found for fingerprint: %s, ad"
1869
"dress: %s", fpr, address)
1870
if self.use_dbus:
1871
# Emit D-Bus signal
1872
mandos_dbus_service.ClientNotFound(fpr,
1873
address[0])
1874
parent_pipe.send(False)
1875
return False
1876
1877
gobject.io_add_watch(parent_pipe.fileno(),
1878
gobject.IO_IN | gobject.IO_HUP,
1879
functools.partial(self.handle_ipc,
1880
parent_pipe =
1881
parent_pipe,
1882
proc = proc,
1883
client_object =
1884
client))
1885
parent_pipe.send(True)
1886
# remove the old hook in favor of the new above hook on
1887
# same fileno
1888
return False
1889
if command == 'funcall':
1890
funcname = request[1]
1891
args = request[2]
1892
kwargs = request[3]
1893
1894
parent_pipe.send(('data', getattr(client_object,
1895
funcname)(*args,
1896
**kwargs)))
1897
1898
if command == 'getattr':
1899
attrname = request[1]
1900
if callable(client_object.__getattribute__(attrname)):
1901
parent_pipe.send(('function',))
1902
else:
1903
parent_pipe.send(('data', client_object
1904
.__getattribute__(attrname)))
1905
1906
if command == 'setattr':
1907
attrname = request[1]
1908
value = request[2]
1909
setattr(client_object, attrname, value)
1910
1313
1911
return True
1314
1912
1315
1913
1316
1914
def string_to_delta(interval):
1317
1915
"""Parse a string and return a datetime.timedelta
1318
1916
1319
>>> string_to_delta(u'7d')
1917
>>> string_to_delta('7d')
1320
1918
datetime.timedelta(7)
1321
>>> string_to_delta(u'60s')
1919
>>> string_to_delta('60s')
1322
1920
datetime.timedelta(0, 60)
1323
>>> string_to_delta(u'60m')
1921
>>> string_to_delta('60m')
1324
1922
datetime.timedelta(0, 3600)
1325
>>> string_to_delta(u'24h')
1923
>>> string_to_delta('24h')
1326
1924
datetime.timedelta(1)
1327
>>> string_to_delta(u'1w')
1925
>>> string_to_delta('1w')
1328
1926
datetime.timedelta(7)
1329
>>> string_to_delta(u'5m 30s')
1927
>>> string_to_delta('5m 30s')
1330
1928
datetime.timedelta(0, 330)
1331
1929
"""
1332
1930
timevalue = datetime.timedelta(0)
1334
1932
try:
1335
1933
suffix = unicode(s[-1])
1336
1934
value = int(s[:-1])
1337
if suffix == u"d":
1935
if suffix == "d":
1338
1936
delta = datetime.timedelta(value)
1339
elif suffix == u"s":
1937
elif suffix == "s":
1340
1938
delta = datetime.timedelta(0, value)
1341
elif suffix == u"m":
1939
elif suffix == "m":
1342
1940
delta = datetime.timedelta(0, 0, 0, 0, value)
1343
elif suffix == u"h":
1941
elif suffix == "h":
1344
1942
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1345
elif suffix == u"w":
1943
elif suffix == "w":
1346
1944
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1347
1945
else:
1348
raise ValueError
1349
except (ValueError, IndexError):
1350
raise ValueError
1946
raise ValueError("Unknown suffix %r" % suffix)
1947
except (ValueError, IndexError) as e:
1948
raise ValueError(*(e.args))
1351
1949
timevalue += delta
1352
1950
return timevalue
1353
1951
1354
1952
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
1953
def daemon(nochdir = False, noclose = False):
1380
1954
"""See daemon(3). Standard BSD Unix function.
1381
1955
1384
1958
sys.exit()
1385
1959
os.setsid()
1386
1960
if not nochdir:
1387
os.chdir(u"/")
1961
os.chdir("/")
1388
1962
if os.fork():
1389
1963
sys.exit()
1390
1964
if not noclose:
1392
1966
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1393
1967
if not stat.S_ISCHR(os.fstat(null).st_mode):
1394
1968
raise OSError(errno.ENODEV,
1395
u"%s not a character device"
1969
"%s not a character device"
1396
1970
% os.path.devnull)
1397
1971
os.dup2(null, sys.stdin.fileno())
1398
1972
os.dup2(null, sys.stdout.fileno())
1406
1980
##################################################################
1407
1981
# Parsing of options, both command line and config file
1408
1982
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]
1983
parser = argparse.ArgumentParser()
1984
parser.add_argument("-v", "--version", action="version",
1985
version = "%%(prog)s %s" % version,
1986
help="show version number and exit")
1987
parser.add_argument("-i", "--interface", metavar="IF",
1988
help="Bind to interface IF")
1989
parser.add_argument("-a", "--address",
1990
help="Address to listen for requests on")
1991
parser.add_argument("-p", "--port", type=int,
1992
help="Port number to receive requests on")
1993
parser.add_argument("--check", action="store_true",
1994
help="Run self-test")
1995
parser.add_argument("--debug", action="store_true",
1996
help="Debug mode; run in foreground and log"
1997
" to terminal")
1998
parser.add_argument("--debuglevel", metavar="LEVEL",
1999
help="Debug level for stdout output")
2000
parser.add_argument("--priority", help="GnuTLS"
2001
" priority string (see GnuTLS documentation)")
2002
parser.add_argument("--servicename",
2003
metavar="NAME", help="Zeroconf service name")
2004
parser.add_argument("--configdir",
2005
default="/etc/mandos", metavar="DIR",
2006
help="Directory to search for configuration"
2007
" files")
2008
parser.add_argument("--no-dbus", action="store_false",
2009
dest="use_dbus", help="Do not provide D-Bus"
2010
" system bus interface")
2011
parser.add_argument("--no-ipv6", action="store_false",
2012
dest="use_ipv6", help="Do not use IPv6")
2013
parser.add_argument("--no-restore", action="store_false",
2014
dest="restore", help="Do not restore stored"
2015
" state")
2016
parser.add_argument("--statedir", metavar="DIR",
2017
help="Directory to save/restore state in")
2018
2019
options = parser.parse_args()
1435
2020
1436
2021
if options.check:
1437
2022
import doctest
1439
2024
sys.exit()
1440
2025
1441
2026
# 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",
2027
server_defaults = { "interface": "",
2028
"address": "",
2029
"port": "",
2030
"debug": "False",
2031
"priority":
2032
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2033
"servicename": "Mandos",
2034
"use_dbus": "True",
2035
"use_ipv6": "True",
2036
"debuglevel": "",
2037
"restore": "True",
2038
"statedir": "/var/lib/mandos"
1451
2039
}
1452
2040
1453
2041
# Parse config file for server-global settings
1454
2042
server_config = configparser.SafeConfigParser(server_defaults)
1455
2043
del server_defaults
1456
2044
server_config.read(os.path.join(options.configdir,
1457
u"mandos.conf"))
2045
"mandos.conf"))
1458
2046
# Convert the SafeConfigParser object to a dict
1459
2047
server_settings = server_config.defaults()
1460
2048
# 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",
2049
for option in ("debug", "use_dbus", "use_ipv6"):
2050
server_settings[option] = server_config.getboolean("DEFAULT",
1463
2051
option)
1464
2052
if server_settings["port"]:
1465
server_settings["port"] = server_config.getint(u"DEFAULT",
1466
u"port")
2053
server_settings["port"] = server_config.getint("DEFAULT",
2054
"port")
1467
2055
del server_config
1468
2056
1469
2057
# Override the settings from the config file with command line
1470
2058
# 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"):
2059
for option in ("interface", "address", "port", "debug",
2060
"priority", "servicename", "configdir",
2061
"use_dbus", "use_ipv6", "debuglevel", "restore",
2062
"statedir"):
1474
2063
value = getattr(options, option)
1475
2064
if value is not None:
1476
2065
server_settings[option] = value
1484
2073
##################################################################
1485
2074
1486
2075
# 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":
2076
debug = server_settings["debug"]
2077
debuglevel = server_settings["debuglevel"]
2078
use_dbus = server_settings["use_dbus"]
2079
use_ipv6 = server_settings["use_ipv6"]
2080
stored_state_path = os.path.join(server_settings["statedir"],
2081
stored_state_file)
2082
2083
if debug:
2084
initlogger(debug, logging.DEBUG)
2085
else:
2086
if not debuglevel:
2087
initlogger(debug)
2088
else:
2089
level = getattr(logging, debuglevel.upper())
2090
initlogger(debug, level)
2091
2092
if server_settings["servicename"] != "Mandos":
1496
2093
syslogger.setFormatter(logging.Formatter
1497
(u'Mandos (%s) [%%(process)d]:'
1498
u' %%(levelname)s: %%(message)s'
1499
% server_settings[u"servicename"]))
2094
('Mandos (%s) [%%(process)d]:'
2095
' %%(levelname)s: %%(message)s'
2096
% server_settings["servicename"]))
1500
2097
1501
2098
# 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"))
2099
client_config = configparser.SafeConfigParser(Client
2100
.client_defaults)
2101
client_config.read(os.path.join(server_settings["configdir"],
2102
"clients.conf"))
1510
2103
1511
2104
global mandos_dbus_service
1512
2105
mandos_dbus_service = None
1513
2106
1514
tcp_server = MandosServer((server_settings[u"address"],
1515
server_settings[u"port"]),
2107
tcp_server = MandosServer((server_settings["address"],
2108
server_settings["port"]),
1516
2109
ClientHandler,
1517
interface=server_settings[u"interface"],
2110
interface=(server_settings["interface"]
2111
or None),
1518
2112
use_ipv6=use_ipv6,
1519
2113
gnutls_priority=
1520
server_settings[u"priority"],
2114
server_settings["priority"],
1521
2115
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)
2116
if not debug:
2117
pidfilename = "/var/run/mandos.pid"
2118
try:
2119
pidfile = open(pidfilename, "w")
2120
except IOError:
2121
logger.error("Could not open file %r", pidfilename)
1527
2122
1528
2123
try:
1529
uid = pwd.getpwnam(u"_mandos").pw_uid
1530
gid = pwd.getpwnam(u"_mandos").pw_gid
2124
uid = pwd.getpwnam("_mandos").pw_uid
2125
gid = pwd.getpwnam("_mandos").pw_gid
1531
2126
except KeyError:
1532
2127
try:
1533
uid = pwd.getpwnam(u"mandos").pw_uid
1534
gid = pwd.getpwnam(u"mandos").pw_gid
2128
uid = pwd.getpwnam("mandos").pw_uid
2129
gid = pwd.getpwnam("mandos").pw_gid
1535
2130
except KeyError:
1536
2131
try:
1537
uid = pwd.getpwnam(u"nobody").pw_uid
1538
gid = pwd.getpwnam(u"nobody").pw_gid
2132
uid = pwd.getpwnam("nobody").pw_uid
2133
gid = pwd.getpwnam("nobody").pw_gid
1539
2134
except KeyError:
1540
2135
uid = 65534
1541
2136
gid = 65534
1542
2137
try:
1543
2138
os.setgid(gid)
1544
2139
os.setuid(uid)
1545
except OSError, error:
2140
except OSError as error:
1546
2141
if error[0] != errno.EPERM:
1547
2142
raise error
1548
2143
1549
# Enable all possible GnuTLS debugging
1550
2144
if debug:
2145
# Enable all possible GnuTLS debugging
2146
1551
2147
# "Use a log level over 10 to enable all debugging options."
1552
2148
# - GnuTLS manual
1553
2149
gnutls.library.functions.gnutls_global_set_log_level(11)
1554
2150
1555
2151
@gnutls.library.types.gnutls_log_func
1556
2152
def debug_gnutls(level, string):
1557
logger.debug(u"GnuTLS: %s", string[:-1])
2153
logger.debug("GnuTLS: %s", string[:-1])
1558
2154
1559
2155
(gnutls.library.functions
1560
2156
.gnutls_global_set_log_function(debug_gnutls))
2157
2158
# Redirect stdin so all checkers get /dev/null
2159
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2160
os.dup2(null, sys.stdin.fileno())
2161
if null > 2:
2162
os.close(null)
2163
2164
# Need to fork before connecting to D-Bus
2165
if not debug:
2166
# Close all input and output, do double fork, etc.
2167
daemon()
2168
2169
gobject.threads_init()
1561
2170
1562
2171
global main_loop
1563
2172
# From the Avahi example code
1566
2175
bus = dbus.SystemBus()
1567
2176
# End of Avahi example code
1568
2177
if use_dbus:
1569
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2178
try:
2179
bus_name = dbus.service.BusName("se.recompile.Mandos",
2180
bus, do_not_queue=True)
2181
old_bus_name = (dbus.service.BusName
2182
("se.bsnet.fukt.Mandos", bus,
2183
do_not_queue=True))
2184
except dbus.exceptions.NameExistsException as e:
2185
logger.error(unicode(e) + ", disabling D-Bus")
2186
use_dbus = False
2187
server_settings["use_dbus"] = False
2188
tcp_server.use_dbus = False
1570
2189
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)
2190
service = AvahiServiceToSyslog(name =
2191
server_settings["servicename"],
2192
servicetype = "_mandos._tcp",
2193
protocol = protocol, bus = bus)
1574
2194
if server_settings["interface"]:
1575
2195
service.interface = (if_nametoindex
1576
(str(server_settings[u"interface"])))
2196
(str(server_settings["interface"])))
2197
2198
global multiprocessing_manager
2199
multiprocessing_manager = multiprocessing.Manager()
1577
2200
1578
2201
client_class = Client
1579
2202
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()))
2203
client_class = functools.partial(ClientDBusTransitional,
2204
bus = bus)
2205
2206
client_settings = Client.config_parser(client_config)
2207
old_client_settings = {}
2208
clients_data = {}
2209
2210
# Get client data and settings from last running state.
2211
if server_settings["restore"]:
2212
try:
2213
with open(stored_state_path, "rb") as stored_state:
2214
clients_data, old_client_settings = (pickle.load
2215
(stored_state))
2216
os.remove(stored_state_path)
2217
except IOError as e:
2218
logger.warning("Could not load persistent state: {0}"
2219
.format(e))
2220
if e.errno != errno.ENOENT:
2221
raise
2222
except EOFError as e:
2223
logger.warning("Could not load persistent state: "
2224
"EOFError: {0}".format(e))
2225
2226
with PGPEngine() as pgp:
2227
for client_name, client in clients_data.iteritems():
2228
# Decide which value to use after restoring saved state.
2229
# We have three different values: Old config file,
2230
# new config file, and saved state.
2231
# New config value takes precedence if it differs from old
2232
# config value, otherwise use saved state.
2233
for name, value in client_settings[client_name].items():
2234
try:
2235
# For each value in new config, check if it
2236
# differs from the old config value (Except for
2237
# the "secret" attribute)
2238
if (name != "secret" and
2239
value != old_client_settings[client_name]
2240
[name]):
2241
client[name] = value
2242
except KeyError:
2243
pass
2244
2245
# Clients who has passed its expire date can still be
2246
# enabled if its last checker was successful. Clients
2247
# whose checker succeeded before we stored its state is
2248
# assumed to have successfully run all checkers during
2249
# downtime.
2250
if client["enabled"]:
2251
if datetime.datetime.utcnow() >= client["expires"]:
2252
if not client["last_checked_ok"]:
2253
logger.warning(
2254
"disabling client {0} - Client never "
2255
"performed a successful checker"
2256
.format(client_name))
2257
client["enabled"] = False
2258
elif client["last_checker_status"] != 0:
2259
logger.warning(
2260
"disabling client {0} - Client "
2261
"last checker failed with error code {1}"
2262
.format(client_name,
2263
client["last_checker_status"]))
2264
client["enabled"] = False
2265
else:
2266
client["expires"] = (datetime.datetime
2267
.utcnow()
2268
+ client["timeout"])
2269
logger.debug("Last checker succeeded,"
2270
" keeping {0} enabled"
2271
.format(client_name))
2272
try:
2273
client["secret"] = (
2274
pgp.decrypt(client["encrypted_secret"],
2275
client_settings[client_name]
2276
["secret"]))
2277
except PGPError:
2278
# If decryption fails, we use secret from new settings
2279
logger.debug("Failed to decrypt {0} old secret"
2280
.format(client_name))
2281
client["secret"] = (
2282
client_settings[client_name]["secret"])
2283
2284
2285
# Add/remove clients based on new changes made to config
2286
for client_name in (set(old_client_settings)
2287
- set(client_settings)):
2288
del clients_data[client_name]
2289
for client_name in (set(client_settings)
2290
- set(old_client_settings)):
2291
clients_data[client_name] = client_settings[client_name]
2292
2293
# Create all client objects
2294
for client_name, client in clients_data.iteritems():
2295
tcp_server.clients[client_name] = client_class(
2296
name = client_name, settings = client)
2297
1585
2298
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()
2299
logger.warning("No clients defined")
1616
2300
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
2301
if not debug:
2302
try:
2303
with pidfile:
2304
pid = os.getpid()
2305
pidfile.write(str(pid) + "\n".encode("utf-8"))
2306
del pidfile
2307
except IOError:
2308
logger.error("Could not write to file %r with PID %d",
2309
pidfilename, pid)
2310
except NameError:
2311
# "pidfile" was never created
2312
pass
2313
del pidfilename
1625
2314
signal.signal(signal.SIGINT, signal.SIG_IGN)
2315
1626
2316
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1627
2317
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1628
2318
1630
2320
class MandosDBusService(dbus.service.Object):
1631
2321
"""A D-Bus proxy object"""
1632
2322
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")
2323
dbus.service.Object.__init__(self, bus, "/")
2324
_interface = "se.recompile.Mandos"
2325
2326
@dbus.service.signal(_interface, signature="o")
2327
def ClientAdded(self, objpath):
2328
"D-Bus signal"
2329
pass
2330
2331
@dbus.service.signal(_interface, signature="ss")
2332
def ClientNotFound(self, fingerprint, address):
2333
"D-Bus signal"
2334
pass
2335
2336
@dbus.service.signal(_interface, signature="os")
1647
2337
def ClientRemoved(self, objpath, name):
1648
2338
"D-Bus signal"
1649
2339
pass
1650
2340
1651
@dbus.service.method(_interface, out_signature=u"ao")
2341
@dbus.service.method(_interface, out_signature="ao")
1652
2342
def GetAllClients(self):
1653
2343
"D-Bus method"
1654
2344
return dbus.Array(c.dbus_object_path
1655
for c in tcp_server.clients)
2345
for c in
2346
tcp_server.clients.itervalues())
1656
2347
1657
2348
@dbus.service.method(_interface,
1658
out_signature=u"a{oa{sv}}")
2349
out_signature="a{oa{sv}}")
1659
2350
def GetAllClientsWithProperties(self):
1660
2351
"D-Bus method"
1661
2352
return dbus.Dictionary(
1662
((c.dbus_object_path, c.GetAll(u""))
1663
for c in tcp_server.clients),
1664
signature=u"oa{sv}")
2353
((c.dbus_object_path, c.GetAll(""))
2354
for c in tcp_server.clients.itervalues()),
2355
signature="oa{sv}")
1665
2356
1666
@dbus.service.method(_interface, in_signature=u"o")
2357
@dbus.service.method(_interface, in_signature="o")
1667
2358
def RemoveClient(self, object_path):
1668
2359
"D-Bus method"
1669
for c in tcp_server.clients:
2360
for c in tcp_server.clients.itervalues():
1670
2361
if c.dbus_object_path == object_path:
1671
tcp_server.clients.remove(c)
2362
del tcp_server.clients[c.name]
1672
2363
c.remove_from_connection()
1673
2364
# Don't signal anything except ClientRemoved
1674
c.disable(signal=False)
2365
c.disable(quiet=True)
1675
2366
# Emit D-Bus signal
1676
2367
self.ClientRemoved(object_path, c.name)
1677
2368
return
1678
raise KeyError
2369
raise KeyError(object_path)
1679
2370
1680
2371
del _interface
1681
2372
1682
mandos_dbus_service = MandosDBusService()
1683
1684
for client in tcp_server.clients:
2373
class MandosDBusServiceTransitional(MandosDBusService):
2374
__metaclass__ = AlternateDBusNamesMetaclass
2375
mandos_dbus_service = MandosDBusServiceTransitional()
2376
2377
def cleanup():
2378
"Cleanup function; run on exit"
2379
service.cleanup()
2380
2381
multiprocessing.active_children()
2382
if not (tcp_server.clients or client_settings):
2383
return
2384
2385
# Store client before exiting. Secrets are encrypted with key
2386
# based on what config file has. If config file is
2387
# removed/edited, old secret will thus be unrecovable.
2388
clients = {}
2389
with PGPEngine() as pgp:
2390
for client in tcp_server.clients.itervalues():
2391
key = client_settings[client.name]["secret"]
2392
client.encrypted_secret = pgp.encrypt(client.secret,
2393
key)
2394
client_dict = {}
2395
2396
# A list of attributes that can not be pickled
2397
# + secret.
2398
exclude = set(("bus", "changedstate", "secret",
2399
"checker"))
2400
for name, typ in (inspect.getmembers
2401
(dbus.service.Object)):
2402
exclude.add(name)
2403
2404
client_dict["encrypted_secret"] = (client
2405
.encrypted_secret)
2406
for attr in client.client_structure:
2407
if attr not in exclude:
2408
client_dict[attr] = getattr(client, attr)
2409
2410
clients[client.name] = client_dict
2411
del client_settings[client.name]["secret"]
2412
2413
try:
2414
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2415
prefix="clients-",
2416
dir=os.path.dirname
2417
(stored_state_path))
2418
with os.fdopen(tempfd, "wb") as stored_state:
2419
pickle.dump((clients, client_settings), stored_state)
2420
os.rename(tempname, stored_state_path)
2421
except (IOError, OSError) as e:
2422
logger.warning("Could not save persistent state: {0}"
2423
.format(e))
2424
if not debug:
2425
try:
2426
os.remove(tempname)
2427
except NameError:
2428
pass
2429
if e.errno not in set((errno.ENOENT, errno.EACCES,
2430
errno.EEXIST)):
2431
raise e
2432
2433
# Delete all clients, and settings from config
2434
while tcp_server.clients:
2435
name, client = tcp_server.clients.popitem()
2436
if use_dbus:
2437
client.remove_from_connection()
2438
# Don't signal anything except ClientRemoved
2439
client.disable(quiet=True)
2440
if use_dbus:
2441
# Emit D-Bus signal
2442
mandos_dbus_service.ClientRemoved(client
2443
.dbus_object_path,
2444
client.name)
2445
client_settings.clear()
2446
2447
atexit.register(cleanup)
2448
2449
for client in tcp_server.clients.itervalues():
1685
2450
if use_dbus:
1686
2451
# Emit D-Bus signal
1687
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1688
client.GetAll(u""))
1689
client.enable()
2452
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2453
# Need to initiate checking of clients
2454
if client.enabled:
2455
client.init_checker()
1690
2456
1691
2457
tcp_server.enable()
1692
2458
tcp_server.server_activate()
1694
2460
# Find out what port we got
1695
2461
service.port = tcp_server.socket.getsockname()[1]
1696
2462
if use_ipv6:
1697
logger.info(u"Now listening on address %r, port %d,"
2463
logger.info("Now listening on address %r, port %d,"
1698
2464
" flowinfo %d, scope_id %d"
1699
2465
% tcp_server.socket.getsockname())
1700
2466
else: # IPv4
1701
logger.info(u"Now listening on address %r, port %d"
2467
logger.info("Now listening on address %r, port %d"
1702
2468
% tcp_server.socket.getsockname())
1703
2469
1704
2470
#service.interface = tcp_server.socket.getsockname()[3]
1707
2473
# From the Avahi example code
1708
2474
try:
1709
2475
service.activate()
1710
except dbus.exceptions.DBusException, error:
1711
logger.critical(u"DBusException: %s", error)
2476
except dbus.exceptions.DBusException as error:
2477
logger.critical("DBusException: %s", error)
2478
cleanup()
1712
2479
sys.exit(1)
1713
2480
# End of Avahi example code
1714
2481
1717
2484
(tcp_server.handle_request
1718
2485
(*args[2:], **kwargs) or True))
1719
2486
1720
logger.debug(u"Starting main loop")
2487
logger.debug("Starting main loop")
1721
2488
main_loop.run()
1722
except AvahiError, error:
1723
logger.critical(u"AvahiError: %s", error)
2489
except AvahiError as error:
2490
logger.critical("AvahiError: %s", error)
2491
cleanup()
1724
2492
sys.exit(1)
1725
2493
except KeyboardInterrupt:
1726
2494
if debug:
1727
print >> sys.stderr
1728
logger.debug(u"Server received KeyboardInterrupt")
1729
logger.debug(u"Server exiting")
2495
print("", file=sys.stderr)
2496
logger.debug("Server received KeyboardInterrupt")
2497
logger.debug("Server exiting")
2498
# Must run before the D-Bus bus name gets deregistered
2499
cleanup()
1730
2500
1731
2501
if __name__ == '__main__':
1732
2502
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0