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- Committer: Teddy Hogeborn
- Date: 2012-01-01 20:45:53 UTC
- Revision ID: teddy@recompile.se-20120101204553-f1zlty873gswtf5n
* README: Hint that the intro(8mandos) manual page is in the server
package.
package.
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
35
36
36
37
import SocketServer as socketserver
37
38
import socket
38
import optparse
39
import argparse
39
40
import datetime
40
41
import errno
41
42
import gnutls.crypto
55
56
import logging
56
57
import logging.handlers
57
58
import pwd
58
from contextlib import closing
59
import contextlib
59
60
import struct
60
61
import fcntl
61
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
67
import tempfile
62
68
63
69
import dbus
64
70
import dbus.service
67
73
from dbus.mainloop.glib import DBusGMainLoop
68
74
import ctypes
69
75
import ctypes.util
76
import xml.dom.minidom
77
import inspect
78
import GnuPGInterface
70
79
71
80
try:
72
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
76
85
except ImportError:
77
86
SO_BINDTODEVICE = None
78
87
79
80
version = "1.0.8"
81
82
logger = logging.Logger(u'mandos')
88
version = "1.5.0"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
83
92
syslogger = (logging.handlers.SysLogHandler
84
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
85
address = "/dev/log"))
86
syslogger.setFormatter(logging.Formatter
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
u' %(message)s'))
89
logger.addHandler(syslogger)
90
91
console = logging.StreamHandler()
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
95
logger.addHandler(console)
94
address = str("/dev/log")))
95
96
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
100
except (OSError, AttributeError):
101
def if_nametoindex(interface):
102
"Get an interface index the hard way, i.e. using fcntl()"
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
with contextlib.closing(socket.socket()) as s:
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
110
return interface_index
111
112
113
def initlogger(debug, level=logging.WARNING):
114
"""init logger and add loglevel"""
115
116
syslogger.setFormatter(logging.Formatter
117
('Mandos [%(process)d]: %(levelname)s:'
118
' %(message)s'))
119
logger.addHandler(syslogger)
120
121
if debug:
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
124
' [%(process)d]:'
125
' %(levelname)s:'
126
' %(message)s'))
127
logger.addHandler(console)
128
logger.setLevel(level)
129
130
131
class PGPError(Exception):
132
"""Exception if encryption/decryption fails"""
133
pass
134
135
136
class PGPEngine(object):
137
"""A simple class for OpenPGP symmetric encryption & decryption"""
138
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
147
148
def __enter__(self):
149
return self
150
151
def __exit__ (self, exc_type, exc_value, traceback):
152
self._cleanup()
153
return False
154
155
def __del__(self):
156
self._cleanup()
157
158
def _cleanup(self):
159
if self.tempdir is not None:
160
# Delete contents of tempdir
161
for root, dirs, files in os.walk(self.tempdir,
162
topdown = False):
163
for filename in files:
164
os.remove(os.path.join(root, filename))
165
for dirname in dirs:
166
os.rmdir(os.path.join(root, dirname))
167
# Remove tempdir
168
os.rmdir(self.tempdir)
169
self.tempdir = None
170
171
def password_encode(self, password):
172
# Passphrase can not be empty and can not contain newlines or
173
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
175
176
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
191
return ciphertext
192
193
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
208
return decrypted_plaintext
209
210
96
211
97
212
class AvahiError(Exception):
98
213
def __init__(self, value, *args, **kwargs):
114
229
Attributes:
115
230
interface: integer; avahi.IF_UNSPEC or an interface index.
116
231
Used to optionally bind to the specified interface.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
232
name: string; Example: 'Mandos'
233
type: string; Example: '_mandos._tcp'.
119
234
See <http://www.dns-sd.org/ServiceTypes.html>
120
235
port: integer; what port to announce
121
236
TXT: list of strings; TXT record for the service
130
245
"""
131
246
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
132
247
servicetype = None, port = None, TXT = None,
133
domain = u"", host = u"", max_renames = 32768,
248
domain = "", host = "", max_renames = 32768,
134
249
protocol = avahi.PROTO_UNSPEC, bus = None):
135
250
self.interface = interface
136
251
self.name = name
145
260
self.group = None # our entry group
146
261
self.server = None
147
262
self.bus = bus
263
self.entry_group_state_changed_match = None
148
264
def rename(self):
149
265
"""Derived from the Avahi example code"""
150
266
if self.rename_count >= self.max_renames:
151
logger.critical(u"No suitable Zeroconf service name found"
152
u" after %i retries, exiting.",
267
logger.critical("No suitable Zeroconf service name found"
268
" after %i retries, exiting.",
153
269
self.rename_count)
154
raise AvahiServiceError(u"Too many renames")
155
self.name = self.server.GetAlternativeServiceName(self.name)
156
logger.info(u"Changing Zeroconf service name to %r ...",
157
unicode(self.name))
158
syslogger.setFormatter(logging.Formatter
159
(u'Mandos (%s) [%%(process)d]:'
160
u' %%(levelname)s: %%(message)s'
161
% self.name))
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)
162
275
self.remove()
163
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)
164
282
self.rename_count += 1
165
283
def remove(self):
166
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
167
288
if self.group is not None:
168
289
self.group.Reset()
169
290
def add(self):
170
291
"""Derived from the Avahi example code"""
292
self.remove()
171
293
if self.group is None:
172
294
self.group = dbus.Interface(
173
295
self.bus.get_object(avahi.DBUS_NAME,
174
296
self.server.EntryGroupNew()),
175
297
avahi.DBUS_INTERFACE_ENTRY_GROUP)
176
self.group.connect_to_signal('StateChanged',
177
self.entry_group_state_changed)
178
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
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' ...",
179
302
self.name, self.type)
180
303
self.group.AddService(
181
304
self.interface,
188
311
self.group.Commit()
189
312
def entry_group_state_changed(self, state, error):
190
313
"""Derived from the Avahi example code"""
191
logger.debug(u"Avahi state change: %i", state)
314
logger.debug("Avahi entry group state change: %i", state)
192
315
193
316
if state == avahi.ENTRY_GROUP_ESTABLISHED:
194
logger.debug(u"Zeroconf service established.")
317
logger.debug("Zeroconf service established.")
195
318
elif state == avahi.ENTRY_GROUP_COLLISION:
196
logger.warning(u"Zeroconf service name collision.")
319
logger.info("Zeroconf service name collision.")
197
320
self.rename()
198
321
elif state == avahi.ENTRY_GROUP_FAILURE:
199
logger.critical(u"Avahi: Error in group state changed %s",
322
logger.critical("Avahi: Error in group state changed %s",
200
323
unicode(error))
201
raise AvahiGroupError(u"State changed: %s"
324
raise AvahiGroupError("State changed: %s"
202
325
% unicode(error))
203
326
def cleanup(self):
204
327
"""Derived from the Avahi example code"""
205
328
if self.group is not None:
206
self.group.Free()
329
try:
330
self.group.Free()
331
except (dbus.exceptions.UnknownMethodException,
332
dbus.exceptions.DBusException):
333
pass
207
334
self.group = None
208
def server_state_changed(self, state):
335
self.remove()
336
def server_state_changed(self, state, error=None):
209
337
"""Derived from the Avahi example code"""
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
212
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()
213
353
elif state == avahi.SERVER_RUNNING:
214
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)
215
360
def activate(self):
216
361
"""Derived from the Avahi example code"""
217
362
if self.server is None:
218
363
self.server = dbus.Interface(
219
364
self.bus.get_object(avahi.DBUS_NAME,
220
avahi.DBUS_PATH_SERVER),
365
avahi.DBUS_PATH_SERVER,
366
follow_name_owner_changes=True),
221
367
avahi.DBUS_INTERFACE_SERVER)
222
self.server.connect_to_signal(u"StateChanged",
368
self.server.connect_to_signal("StateChanged",
223
369
self.server_state_changed)
224
370
self.server_state_changed(self.server.GetState())
225
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
226
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
227
388
class Client(object):
228
389
"""A representation of a client host served by this server.
229
390
230
391
Attributes:
231
name: string; from the config file, used in log messages and
232
D-Bus identifiers
233
fingerprint: string (40 or 32 hexadecimal digits); used to
234
uniquely identify the client
235
secret: bytestring; sent verbatim (over TLS) to client
236
host: string; available for use by the checker command
237
created: datetime.datetime(); (UTC) object creation
238
last_enabled: datetime.datetime(); (UTC)
239
enabled: bool()
240
last_checked_ok: datetime.datetime(); (UTC) or None
241
timeout: datetime.timedelta(); How long from last_checked_ok
242
until this client is invalid
243
interval: datetime.timedelta(); How often to start a new checker
244
disable_hook: If set, called by disable() as disable_hook(self)
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
245
395
checker: subprocess.Popen(); a running checker process used
246
396
to see if the client lives.
247
397
'None' if no process is running.
248
checker_initiator_tag: a gobject event source tag, or None
249
disable_initiator_tag: - '' -
250
checker_callback_tag: - '' -
251
checker_command: string; External command which is run to check if
252
client lives. %() expansions are done at
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
253
401
runtime with vars(self) as dict, so that for
254
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
255
407
current_checker_command: string; current running checker_command
408
disable_initiator_tag: a gobject event source tag, or None
409
enabled: bool()
410
fingerprint: string (40 or 32 hexadecimal digits); used to
411
uniquely identify the client
412
host: string; available for use by the checker command
413
interval: datetime.timedelta(); How often to start a new checker
414
last_approval_request: datetime.datetime(); (UTC) or None
415
last_checked_ok: datetime.datetime(); (UTC) or None
416
last_checker_status: integer between 0 and 255 reflecting exit
417
status of last checker. -1 reflects crashed
418
checker, or None.
419
last_enabled: datetime.datetime(); (UTC) or None
420
name: string; from the config file, used in log messages and
421
D-Bus identifiers
422
secret: bytestring; sent verbatim (over TLS) to client
423
timeout: datetime.timedelta(); How long from last_checked_ok
424
until this client is disabled
425
extended_timeout: extra long timeout when password has been sent
426
runtime_expansions: Allowed attributes for runtime expansion.
427
expires: datetime.datetime(); time (UTC) when a client will be
428
disabled, or None
256
429
"""
257
430
258
@staticmethod
259
def _datetime_to_milliseconds(dt):
260
"Convert a datetime.datetime() to milliseconds"
261
return ((dt.days * 24 * 60 * 60 * 1000)
262
+ (dt.seconds * 1000)
263
+ (dt.microseconds // 1000))
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
}
264
445
265
446
def timeout_milliseconds(self):
266
447
"Return the 'timeout' attribute in milliseconds"
267
return self._datetime_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)
268
453
269
454
def interval_milliseconds(self):
270
455
"Return the 'interval' attribute in milliseconds"
271
return self._datetime_to_milliseconds(self.interval)
456
return timedelta_to_milliseconds(self.interval)
272
457
273
def __init__(self, name = None, disable_hook=None, config=None):
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
460
461
@staticmethod
462
def config_parser(config):
463
"""Construct a new dict of client settings of this form:
464
{ client_name: {setting_name: value, ...}, ...}
465
with exceptions for any special settings as defined above.
466
NOTE: Must be a pure function. Must return the same result
467
value given the same arguments.
468
"""
469
settings = {}
470
for client_name in config.sections():
471
section = dict(config.items(client_name))
472
client = settings[client_name] = {}
473
474
client["host"] = section["host"]
475
# Reformat values from string types to Python types
476
client["approved_by_default"] = config.getboolean(
477
client_name, "approved_by_default")
478
client["enabled"] = config.getboolean(client_name,
479
"enabled")
480
481
client["fingerprint"] = (section["fingerprint"].upper()
482
.replace(" ", ""))
483
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
485
elif "secfile" in section:
486
with open(os.path.expanduser(os.path.expandvars
487
(section["secfile"])),
488
"rb") as secfile:
489
client["secret"] = secfile.read()
490
else:
491
raise TypeError("No secret or secfile for section %s"
492
% section)
493
client["timeout"] = string_to_delta(section["timeout"])
494
client["extended_timeout"] = string_to_delta(
495
section["extended_timeout"])
496
client["interval"] = string_to_delta(section["interval"])
497
client["approval_delay"] = string_to_delta(
498
section["approval_delay"])
499
client["approval_duration"] = string_to_delta(
500
section["approval_duration"])
501
client["checker_command"] = section["checker"]
502
client["last_approval_request"] = None
503
client["last_checked_ok"] = None
504
client["last_checker_status"] = None
505
506
return settings
507
508
509
def __init__(self, settings, name = None):
274
510
"""Note: the 'checker' key in 'config' sets the
275
511
'checker_command' attribute and *not* the 'checker'
276
512
attribute."""
277
513
self.name = name
278
if config is None:
279
config = {}
280
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)
281
529
# Uppercase and remove spaces from fingerprint for later
282
530
# comparison purposes with return value from the fingerprint()
283
531
# function
284
self.fingerprint = (config[u"fingerprint"].upper()
285
.replace(u" ", u""))
286
logger.debug(u" Fingerprint: %s", self.fingerprint)
287
if u"secret" in config:
288
self.secret = config[u"secret"].decode(u"base64")
289
elif u"secfile" in config:
290
with closing(open(os.path.expanduser
291
(os.path.expandvars
292
(config[u"secfile"])))) as secfile:
293
self.secret = secfile.read()
294
else:
295
raise TypeError(u"No secret or secfile for client %s"
296
% self.name)
297
self.host = config.get(u"host", u"")
298
self.created = datetime.datetime.utcnow()
299
self.enabled = False
300
self.last_enabled = None
301
self.last_checked_ok = None
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
304
self.disable_hook = disable_hook
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
305
537
self.checker = None
306
538
self.checker_initiator_tag = None
307
539
self.disable_initiator_tag = None
308
540
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
310
541
self.current_checker_command = None
311
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()
312
563
313
564
def enable(self):
314
565
"""Start this client's checker and timeout hooks"""
566
if getattr(self, "enabled", False):
567
# Already enabled
568
return
569
self.send_changedstate()
570
self.expires = datetime.datetime.utcnow() + self.timeout
571
self.enabled = True
315
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):
316
599
# Schedule a new checker to be started an 'interval' from now,
317
600
# and every interval from then on.
318
601
self.checker_initiator_tag = (gobject.timeout_add
319
602
(self.interval_milliseconds(),
320
603
self.start_checker))
321
# Also start a new checker *right now*.
322
self.start_checker()
323
604
# Schedule a disable() when 'timeout' has passed
324
605
self.disable_initiator_tag = (gobject.timeout_add
325
606
(self.timeout_milliseconds(),
326
607
self.disable))
327
self.enabled = True
328
329
def disable(self):
330
"""Disable this client."""
331
if not getattr(self, "enabled", False):
332
return False
333
logger.info(u"Disabling client %s", self.name)
334
if getattr(self, u"disable_initiator_tag", False):
335
gobject.source_remove(self.disable_initiator_tag)
336
self.disable_initiator_tag = None
337
if getattr(self, u"checker_initiator_tag", False):
338
gobject.source_remove(self.checker_initiator_tag)
339
self.checker_initiator_tag = None
340
self.stop_checker()
341
if self.disable_hook:
342
self.disable_hook(self)
343
self.enabled = False
344
# Do not run this again if called by a gobject.timeout_add
345
return False
346
347
def __del__(self):
348
self.disable_hook = None
349
self.disable()
608
# Also start a new checker *right now*.
609
self.start_checker()
350
610
351
611
def checker_callback(self, pid, condition, command):
352
612
"""The checker has completed, so take appropriate actions."""
353
613
self.checker_callback_tag = None
354
614
self.checker = None
355
615
if os.WIFEXITED(condition):
356
exitstatus = os.WEXITSTATUS(condition)
357
if exitstatus == 0:
358
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",
359
619
vars(self))
360
620
self.checked_ok()
361
621
else:
362
logger.info(u"Checker for %(name)s failed",
622
logger.info("Checker for %(name)s failed",
363
623
vars(self))
364
624
else:
365
logger.warning(u"Checker for %(name)s crashed?",
625
self.last_checker_status = -1
626
logger.warning("Checker for %(name)s crashed?",
366
627
vars(self))
367
628
368
def checked_ok(self):
629
def checked_ok(self, timeout=None):
369
630
"""Bump up the timeout for this client.
370
631
371
632
This should only be called when the client has been seen,
372
633
alive and well.
373
634
"""
635
if timeout is None:
636
timeout = self.timeout
374
637
self.last_checked_ok = datetime.datetime.utcnow()
375
gobject.source_remove(self.disable_initiator_tag)
376
self.disable_initiator_tag = (gobject.timeout_add
377
(self.timeout_milliseconds(),
378
self.disable))
638
if self.disable_initiator_tag is not None:
639
gobject.source_remove(self.disable_initiator_tag)
640
if getattr(self, "enabled", False):
641
self.disable_initiator_tag = (gobject.timeout_add
642
(timedelta_to_milliseconds
643
(timeout), self.disable))
644
self.expires = datetime.datetime.utcnow() + timeout
645
646
def need_approval(self):
647
self.last_approval_request = datetime.datetime.utcnow()
379
648
380
649
def start_checker(self):
381
650
"""Start a new checker subprocess if one is not running.
388
657
# client would inevitably timeout, since no checker would get
389
658
# a chance to run to completion. If we instead leave running
390
659
# checkers alone, the checker would have to take more time
391
# than 'timeout' for the client to be declared invalid, which
392
# is as it should be.
660
# than 'timeout' for the client to be disabled, which is as it
661
# should be.
393
662
394
663
# If a checker exists, make sure it is not a zombie
395
if self.checker is not None:
664
try:
396
665
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
666
except (AttributeError, OSError) as error:
667
if (isinstance(error, OSError)
668
and error.errno != errno.ECHILD):
669
raise error
670
else:
397
671
if pid:
398
logger.warning(u"Checker was a zombie")
672
logger.warning("Checker was a zombie")
399
673
gobject.source_remove(self.checker_callback_tag)
400
674
self.checker_callback(pid, status,
401
675
self.current_checker_command)
406
680
command = self.checker_command % self.host
407
681
except TypeError:
408
682
# Escape attributes for the shell
409
escaped_attrs = dict((key,
410
re.escape(unicode(str(val),
411
errors=
412
u'replace')))
413
for key, val in
414
vars(self).iteritems())
683
escaped_attrs = dict(
684
(attr,
685
re.escape(unicode(str(getattr(self, attr, "")),
686
errors=
687
'replace')))
688
for attr in
689
self.runtime_expansions)
690
415
691
try:
416
692
command = self.checker_command % escaped_attrs
417
except TypeError, error:
418
logger.error(u'Could not format string "%s":'
419
u' %s', self.checker_command, error)
693
except TypeError as error:
694
logger.error('Could not format string "%s":'
695
' %s', self.checker_command, error)
420
696
return True # Try again later
421
697
self.current_checker_command = command
422
698
try:
423
logger.info(u"Starting checker %r for %s",
699
logger.info("Starting checker %r for %s",
424
700
command, self.name)
425
701
# We don't need to redirect stdout and stderr, since
426
702
# in normal mode, that is already done by daemon(),
428
704
# always replaced by /dev/null.)
429
705
self.checker = subprocess.Popen(command,
430
706
close_fds=True,
431
shell=True, cwd=u"/")
707
shell=True, cwd="/")
432
708
self.checker_callback_tag = (gobject.child_watch_add
433
709
(self.checker.pid,
434
710
self.checker_callback,
439
715
if pid:
440
716
gobject.source_remove(self.checker_callback_tag)
441
717
self.checker_callback(pid, status, command)
442
except OSError, error:
443
logger.error(u"Failed to start subprocess: %s",
718
except OSError as error:
719
logger.error("Failed to start subprocess: %s",
444
720
error)
445
721
# Re-run this periodically if run by gobject.timeout_add
446
722
return True
450
726
if self.checker_callback_tag:
451
727
gobject.source_remove(self.checker_callback_tag)
452
728
self.checker_callback_tag = None
453
if getattr(self, u"checker", None) is None:
729
if getattr(self, "checker", None) is None:
454
730
return
455
logger.debug(u"Stopping checker for %(name)s", vars(self))
731
logger.debug("Stopping checker for %(name)s", vars(self))
456
732
try:
457
733
os.kill(self.checker.pid, signal.SIGTERM)
458
#os.sleep(0.5)
734
#time.sleep(0.5)
459
735
#if self.checker.poll() is None:
460
736
# os.kill(self.checker.pid, signal.SIGKILL)
461
except OSError, error:
737
except OSError as error:
462
738
if error.errno != errno.ESRCH: # No such process
463
739
raise
464
740
self.checker = None
465
466
def still_valid(self):
467
"""Has the timeout not yet passed for this client?"""
468
if not getattr(self, u"enabled", False):
469
return False
470
now = datetime.datetime.utcnow()
471
if self.last_checked_ok is None:
472
return now < (self.created + self.timeout)
473
else:
474
return now < (self.last_checked_ok + self.timeout)
475
476
477
class ClientDBus(Client, dbus.service.Object):
741
742
743
def dbus_service_property(dbus_interface, signature="v",
744
access="readwrite", byte_arrays=False):
745
"""Decorators for marking methods of a DBusObjectWithProperties to
746
become properties on the D-Bus.
747
748
The decorated method will be called with no arguments by "Get"
749
and with one argument by "Set".
750
751
The parameters, where they are supported, are the same as
752
dbus.service.method, except there is only "signature", since the
753
type from Get() and the type sent to Set() is the same.
754
"""
755
# Encoding deeply encoded byte arrays is not supported yet by the
756
# "Set" method, so we fail early here:
757
if byte_arrays and signature != "ay":
758
raise ValueError("Byte arrays not supported for non-'ay'"
759
" signature %r" % signature)
760
def decorator(func):
761
func._dbus_is_property = True
762
func._dbus_interface = dbus_interface
763
func._dbus_signature = signature
764
func._dbus_access = access
765
func._dbus_name = func.__name__
766
if func._dbus_name.endswith("_dbus_property"):
767
func._dbus_name = func._dbus_name[:-14]
768
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
769
return func
770
return decorator
771
772
773
class DBusPropertyException(dbus.exceptions.DBusException):
774
"""A base class for D-Bus property-related exceptions
775
"""
776
def __unicode__(self):
777
return unicode(str(self))
778
779
780
class DBusPropertyAccessException(DBusPropertyException):
781
"""A property's access permissions disallows an operation.
782
"""
783
pass
784
785
786
class DBusPropertyNotFound(DBusPropertyException):
787
"""An attempt was made to access a non-existing property.
788
"""
789
pass
790
791
792
class DBusObjectWithProperties(dbus.service.Object):
793
"""A D-Bus object with properties.
794
795
Classes inheriting from this can use the dbus_service_property
796
decorator to expose methods as D-Bus properties. It exposes the
797
standard Get(), Set(), and GetAll() methods on the D-Bus.
798
"""
799
800
@staticmethod
801
def _is_dbus_property(obj):
802
return getattr(obj, "_dbus_is_property", False)
803
804
def _get_all_dbus_properties(self):
805
"""Returns a generator of (name, attribute) pairs
806
"""
807
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
808
for cls in self.__class__.__mro__
809
for name, prop in
810
inspect.getmembers(cls, self._is_dbus_property))
811
812
def _get_dbus_property(self, interface_name, property_name):
813
"""Returns a bound method if one exists which is a D-Bus
814
property with the specified name and interface.
815
"""
816
for cls in self.__class__.__mro__:
817
for name, value in (inspect.getmembers
818
(cls, self._is_dbus_property)):
819
if (value._dbus_name == property_name
820
and value._dbus_interface == interface_name):
821
return value.__get__(self)
822
823
# No such property
824
raise DBusPropertyNotFound(self.dbus_object_path + ":"
825
+ interface_name + "."
826
+ property_name)
827
828
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
829
out_signature="v")
830
def Get(self, interface_name, property_name):
831
"""Standard D-Bus property Get() method, see D-Bus standard.
832
"""
833
prop = self._get_dbus_property(interface_name, property_name)
834
if prop._dbus_access == "write":
835
raise DBusPropertyAccessException(property_name)
836
value = prop()
837
if not hasattr(value, "variant_level"):
838
return value
839
return type(value)(value, variant_level=value.variant_level+1)
840
841
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
842
def Set(self, interface_name, property_name, value):
843
"""Standard D-Bus property Set() method, see D-Bus standard.
844
"""
845
prop = self._get_dbus_property(interface_name, property_name)
846
if prop._dbus_access == "read":
847
raise DBusPropertyAccessException(property_name)
848
if prop._dbus_get_args_options["byte_arrays"]:
849
# The byte_arrays option is not supported yet on
850
# signatures other than "ay".
851
if prop._dbus_signature != "ay":
852
raise ValueError
853
value = dbus.ByteArray(b''.join(chr(byte)
854
for byte in value))
855
prop(value)
856
857
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
858
out_signature="a{sv}")
859
def GetAll(self, interface_name):
860
"""Standard D-Bus property GetAll() method, see D-Bus
861
standard.
862
863
Note: Will not include properties with access="write".
864
"""
865
properties = {}
866
for name, prop in self._get_all_dbus_properties():
867
if (interface_name
868
and interface_name != prop._dbus_interface):
869
# Interface non-empty but did not match
870
continue
871
# Ignore write-only properties
872
if prop._dbus_access == "write":
873
continue
874
value = prop()
875
if not hasattr(value, "variant_level"):
876
properties[name] = value
877
continue
878
properties[name] = type(value)(value, variant_level=
879
value.variant_level+1)
880
return dbus.Dictionary(properties, signature="sv")
881
882
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
883
out_signature="s",
884
path_keyword='object_path',
885
connection_keyword='connection')
886
def Introspect(self, object_path, connection):
887
"""Standard D-Bus method, overloaded to insert property tags.
888
"""
889
xmlstring = dbus.service.Object.Introspect(self, object_path,
890
connection)
891
try:
892
document = xml.dom.minidom.parseString(xmlstring)
893
def make_tag(document, name, prop):
894
e = document.createElement("property")
895
e.setAttribute("name", name)
896
e.setAttribute("type", prop._dbus_signature)
897
e.setAttribute("access", prop._dbus_access)
898
return e
899
for if_tag in document.getElementsByTagName("interface"):
900
for tag in (make_tag(document, name, prop)
901
for name, prop
902
in self._get_all_dbus_properties()
903
if prop._dbus_interface
904
== if_tag.getAttribute("name")):
905
if_tag.appendChild(tag)
906
# Add the names to the return values for the
907
# "org.freedesktop.DBus.Properties" methods
908
if (if_tag.getAttribute("name")
909
== "org.freedesktop.DBus.Properties"):
910
for cn in if_tag.getElementsByTagName("method"):
911
if cn.getAttribute("name") == "Get":
912
for arg in cn.getElementsByTagName("arg"):
913
if (arg.getAttribute("direction")
914
== "out"):
915
arg.setAttribute("name", "value")
916
elif cn.getAttribute("name") == "GetAll":
917
for arg in cn.getElementsByTagName("arg"):
918
if (arg.getAttribute("direction")
919
== "out"):
920
arg.setAttribute("name", "props")
921
xmlstring = document.toxml("utf-8")
922
document.unlink()
923
except (AttributeError, xml.dom.DOMException,
924
xml.parsers.expat.ExpatError) as error:
925
logger.error("Failed to override Introspection method",
926
error)
927
return xmlstring
928
929
930
def datetime_to_dbus (dt, variant_level=0):
931
"""Convert a UTC datetime.datetime() to a D-Bus type."""
932
if dt is None:
933
return dbus.String("", variant_level = variant_level)
934
return dbus.String(dt.isoformat(),
935
variant_level=variant_level)
936
937
938
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
939
.__metaclass__):
940
"""Applied to an empty subclass of a D-Bus object, this metaclass
941
will add additional D-Bus attributes matching a certain pattern.
942
"""
943
def __new__(mcs, name, bases, attr):
944
# Go through all the base classes which could have D-Bus
945
# methods, signals, or properties in them
946
for base in (b for b in bases
947
if issubclass(b, dbus.service.Object)):
948
# Go though all attributes of the base class
949
for attrname, attribute in inspect.getmembers(base):
950
# Ignore non-D-Bus attributes, and D-Bus attributes
951
# with the wrong interface name
952
if (not hasattr(attribute, "_dbus_interface")
953
or not attribute._dbus_interface
954
.startswith("se.recompile.Mandos")):
955
continue
956
# Create an alternate D-Bus interface name based on
957
# the current name
958
alt_interface = (attribute._dbus_interface
959
.replace("se.recompile.Mandos",
960
"se.bsnet.fukt.Mandos"))
961
# Is this a D-Bus signal?
962
if getattr(attribute, "_dbus_is_signal", False):
963
# Extract the original non-method function by
964
# black magic
965
nonmethod_func = (dict(
966
zip(attribute.func_code.co_freevars,
967
attribute.__closure__))["func"]
968
.cell_contents)
969
# Create a new, but exactly alike, function
970
# object, and decorate it to be a new D-Bus signal
971
# with the alternate D-Bus interface name
972
new_function = (dbus.service.signal
973
(alt_interface,
974
attribute._dbus_signature)
975
(types.FunctionType(
976
nonmethod_func.func_code,
977
nonmethod_func.func_globals,
978
nonmethod_func.func_name,
979
nonmethod_func.func_defaults,
980
nonmethod_func.func_closure)))
981
# Define a creator of a function to call both the
982
# old and new functions, so both the old and new
983
# signals gets sent when the function is called
984
def fixscope(func1, func2):
985
"""This function is a scope container to pass
986
func1 and func2 to the "call_both" function
987
outside of its arguments"""
988
def call_both(*args, **kwargs):
989
"""This function will emit two D-Bus
990
signals by calling func1 and func2"""
991
func1(*args, **kwargs)
992
func2(*args, **kwargs)
993
return call_both
994
# Create the "call_both" function and add it to
995
# the class
996
attr[attrname] = fixscope(attribute,
997
new_function)
998
# Is this a D-Bus method?
999
elif getattr(attribute, "_dbus_is_method", False):
1000
# Create a new, but exactly alike, function
1001
# object. Decorate it to be a new D-Bus method
1002
# with the alternate D-Bus interface name. Add it
1003
# to the class.
1004
attr[attrname] = (dbus.service.method
1005
(alt_interface,
1006
attribute._dbus_in_signature,
1007
attribute._dbus_out_signature)
1008
(types.FunctionType
1009
(attribute.func_code,
1010
attribute.func_globals,
1011
attribute.func_name,
1012
attribute.func_defaults,
1013
attribute.func_closure)))
1014
# Is this a D-Bus property?
1015
elif getattr(attribute, "_dbus_is_property", False):
1016
# Create a new, but exactly alike, function
1017
# object, and decorate it to be a new D-Bus
1018
# property with the alternate D-Bus interface
1019
# name. Add it to the class.
1020
attr[attrname] = (dbus_service_property
1021
(alt_interface,
1022
attribute._dbus_signature,
1023
attribute._dbus_access,
1024
attribute
1025
._dbus_get_args_options
1026
["byte_arrays"])
1027
(types.FunctionType
1028
(attribute.func_code,
1029
attribute.func_globals,
1030
attribute.func_name,
1031
attribute.func_defaults,
1032
attribute.func_closure)))
1033
return type.__new__(mcs, name, bases, attr)
1034
1035
1036
class ClientDBus(Client, DBusObjectWithProperties):
478
1037
"""A Client class using D-Bus
479
1038
480
1039
Attributes:
481
1040
dbus_object_path: dbus.ObjectPath
482
1041
bus: dbus.SystemBus()
483
1042
"""
1043
1044
runtime_expansions = (Client.runtime_expansions
1045
+ ("dbus_object_path",))
1046
484
1047
# dbus.service.Object doesn't use super(), so we can't either.
485
1048
486
1049
def __init__(self, bus = None, *args, **kwargs):
487
1050
self.bus = bus
488
1051
Client.__init__(self, *args, **kwargs)
1052
self._approvals_pending = 0
1053
1054
self._approvals_pending = 0
489
1055
# Only now, when this client is initialized, can it show up on
490
1056
# the D-Bus
1057
client_object_name = unicode(self.name).translate(
1058
{ord("."): ord("_"),
1059
ord("-"): ord("_")})
491
1060
self.dbus_object_path = (dbus.ObjectPath
492
(u"/clients/"
493
+ self.name.replace(u".", u"_")))
494
dbus.service.Object.__init__(self, self.bus,
495
self.dbus_object_path)
496
497
@staticmethod
498
def _datetime_to_dbus(dt, variant_level=0):
499
"""Convert a UTC datetime.datetime() to a D-Bus type."""
500
return dbus.String(dt.isoformat(),
501
variant_level=variant_level)
502
503
def enable(self):
504
oldstate = getattr(self, u"enabled", False)
505
r = Client.enable(self)
506
if oldstate != self.enabled:
507
# Emit D-Bus signals
508
self.PropertyChanged(dbus.String(u"enabled"),
509
dbus.Boolean(True, variant_level=1))
510
self.PropertyChanged(
511
dbus.String(u"last_enabled"),
512
self._datetime_to_dbus(self.last_enabled,
513
variant_level=1))
514
return r
515
516
def disable(self, signal = True):
517
oldstate = getattr(self, u"enabled", False)
518
r = Client.disable(self)
519
if signal and oldstate != self.enabled:
520
# Emit D-Bus signal
521
self.PropertyChanged(dbus.String(u"enabled"),
522
dbus.Boolean(False, variant_level=1))
523
return r
1061
("/clients/" + client_object_name))
1062
DBusObjectWithProperties.__init__(self, self.bus,
1063
self.dbus_object_path)
1064
1065
def notifychangeproperty(transform_func,
1066
dbus_name, type_func=lambda x: x,
1067
variant_level=1):
1068
""" Modify a variable so that it's a property which announces
1069
its changes to DBus.
1070
1071
transform_fun: Function that takes a value and a variant_level
1072
and transforms it to a D-Bus type.
1073
dbus_name: D-Bus name of the variable
1074
type_func: Function that transform the value before sending it
1075
to the D-Bus. Default: no transform
1076
variant_level: D-Bus variant level. Default: 1
1077
"""
1078
attrname = "_{0}".format(dbus_name)
1079
def setter(self, value):
1080
if hasattr(self, "dbus_object_path"):
1081
if (not hasattr(self, attrname) or
1082
type_func(getattr(self, attrname, None))
1083
!= type_func(value)):
1084
dbus_value = transform_func(type_func(value),
1085
variant_level
1086
=variant_level)
1087
self.PropertyChanged(dbus.String(dbus_name),
1088
dbus_value)
1089
setattr(self, attrname, value)
1090
1091
return property(lambda self: getattr(self, attrname), setter)
1092
1093
1094
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1095
approvals_pending = notifychangeproperty(dbus.Boolean,
1096
"ApprovalPending",
1097
type_func = bool)
1098
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1099
last_enabled = notifychangeproperty(datetime_to_dbus,
1100
"LastEnabled")
1101
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1102
type_func = lambda checker:
1103
checker is not None)
1104
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1105
"LastCheckedOK")
1106
last_approval_request = notifychangeproperty(
1107
datetime_to_dbus, "LastApprovalRequest")
1108
approved_by_default = notifychangeproperty(dbus.Boolean,
1109
"ApprovedByDefault")
1110
approval_delay = notifychangeproperty(dbus.UInt64,
1111
"ApprovalDelay",
1112
type_func =
1113
timedelta_to_milliseconds)
1114
approval_duration = notifychangeproperty(
1115
dbus.UInt64, "ApprovalDuration",
1116
type_func = timedelta_to_milliseconds)
1117
host = notifychangeproperty(dbus.String, "Host")
1118
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1119
type_func =
1120
timedelta_to_milliseconds)
1121
extended_timeout = notifychangeproperty(
1122
dbus.UInt64, "ExtendedTimeout",
1123
type_func = timedelta_to_milliseconds)
1124
interval = notifychangeproperty(dbus.UInt64,
1125
"Interval",
1126
type_func =
1127
timedelta_to_milliseconds)
1128
checker_command = notifychangeproperty(dbus.String, "Checker")
1129
1130
del notifychangeproperty
524
1131
525
1132
def __del__(self, *args, **kwargs):
526
1133
try:
527
1134
self.remove_from_connection()
528
1135
except LookupError:
529
1136
pass
530
if hasattr(dbus.service.Object, u"__del__"):
531
dbus.service.Object.__del__(self, *args, **kwargs)
1137
if hasattr(DBusObjectWithProperties, "__del__"):
1138
DBusObjectWithProperties.__del__(self, *args, **kwargs)
532
1139
Client.__del__(self, *args, **kwargs)
533
1140
534
1141
def checker_callback(self, pid, condition, command,
535
1142
*args, **kwargs):
536
1143
self.checker_callback_tag = None
537
1144
self.checker = None
538
# Emit D-Bus signal
539
self.PropertyChanged(dbus.String(u"checker_running"),
540
dbus.Boolean(False, variant_level=1))
541
1145
if os.WIFEXITED(condition):
542
1146
exitstatus = os.WEXITSTATUS(condition)
543
1147
# Emit D-Bus signal
553
1157
return Client.checker_callback(self, pid, condition, command,
554
1158
*args, **kwargs)
555
1159
556
def checked_ok(self, *args, **kwargs):
557
r = Client.checked_ok(self, *args, **kwargs)
558
# Emit D-Bus signal
559
self.PropertyChanged(
560
dbus.String(u"last_checked_ok"),
561
(self._datetime_to_dbus(self.last_checked_ok,
562
variant_level=1)))
563
return r
564
565
1160
def start_checker(self, *args, **kwargs):
566
1161
old_checker = self.checker
567
1162
if self.checker is not None:
574
1169
and old_checker_pid != self.checker.pid):
575
1170
# Emit D-Bus signal
576
1171
self.CheckerStarted(self.current_checker_command)
577
self.PropertyChanged(
578
dbus.String(u"checker_running"),
579
dbus.Boolean(True, variant_level=1))
580
return r
581
582
def stop_checker(self, *args, **kwargs):
583
old_checker = getattr(self, u"checker", None)
584
r = Client.stop_checker(self, *args, **kwargs)
585
if (old_checker is not None
586
and getattr(self, u"checker", None) is None):
587
self.PropertyChanged(dbus.String(u"checker_running"),
588
dbus.Boolean(False, variant_level=1))
589
return r
590
591
## D-Bus methods & signals
592
_interface = u"se.bsnet.fukt.Mandos.Client"
593
594
# CheckedOK - method
595
@dbus.service.method(_interface)
596
def CheckedOK(self):
597
return self.checked_ok()
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
598
1190
599
1191
# CheckerCompleted - signal
600
@dbus.service.signal(_interface, signature=u"nxs")
1192
@dbus.service.signal(_interface, signature="nxs")
601
1193
def CheckerCompleted(self, exitcode, waitstatus, command):
602
1194
"D-Bus signal"
603
1195
pass
604
1196
605
1197
# CheckerStarted - signal
606
@dbus.service.signal(_interface, signature=u"s")
1198
@dbus.service.signal(_interface, signature="s")
607
1199
def CheckerStarted(self, command):
608
1200
"D-Bus signal"
609
1201
pass
610
1202
611
# GetAllProperties - method
612
@dbus.service.method(_interface, out_signature=u"a{sv}")
613
def GetAllProperties(self):
614
"D-Bus method"
615
return dbus.Dictionary({
616
dbus.String(u"name"):
617
dbus.String(self.name, variant_level=1),
618
dbus.String(u"fingerprint"):
619
dbus.String(self.fingerprint, variant_level=1),
620
dbus.String(u"host"):
621
dbus.String(self.host, variant_level=1),
622
dbus.String(u"created"):
623
self._datetime_to_dbus(self.created,
624
variant_level=1),
625
dbus.String(u"last_enabled"):
626
(self._datetime_to_dbus(self.last_enabled,
627
variant_level=1)
628
if self.last_enabled is not None
629
else dbus.Boolean(False, variant_level=1)),
630
dbus.String(u"enabled"):
631
dbus.Boolean(self.enabled, variant_level=1),
632
dbus.String(u"last_checked_ok"):
633
(self._datetime_to_dbus(self.last_checked_ok,
634
variant_level=1)
635
if self.last_checked_ok is not None
636
else dbus.Boolean (False, variant_level=1)),
637
dbus.String(u"timeout"):
638
dbus.UInt64(self.timeout_milliseconds(),
639
variant_level=1),
640
dbus.String(u"interval"):
641
dbus.UInt64(self.interval_milliseconds(),
642
variant_level=1),
643
dbus.String(u"checker"):
644
dbus.String(self.checker_command,
645
variant_level=1),
646
dbus.String(u"checker_running"):
647
dbus.Boolean(self.checker is not None,
648
variant_level=1),
649
dbus.String(u"object_path"):
650
dbus.ObjectPath(self.dbus_object_path,
651
variant_level=1)
652
}, signature=u"sv")
653
654
# IsStillValid - method
655
@dbus.service.method(_interface, out_signature=u"b")
656
def IsStillValid(self):
657
return self.still_valid()
658
659
1203
# PropertyChanged - signal
660
@dbus.service.signal(_interface, signature=u"sv")
1204
@dbus.service.signal(_interface, signature="sv")
661
1205
def PropertyChanged(self, property, value):
662
1206
"D-Bus signal"
663
1207
pass
664
1208
665
# ReceivedSecret - signal
1209
# GotSecret - signal
666
1210
@dbus.service.signal(_interface)
667
def ReceivedSecret(self):
668
"D-Bus signal"
1211
def GotSecret(self):
1212
"""D-Bus signal
1213
Is sent after a successful transfer of secret from the Mandos
1214
server to mandos-client
1215
"""
669
1216
pass
670
1217
671
1218
# Rejected - signal
672
@dbus.service.signal(_interface)
673
def Rejected(self):
674
"D-Bus signal"
675
pass
676
677
# SetChecker - method
678
@dbus.service.method(_interface, in_signature=u"s")
679
def SetChecker(self, checker):
680
"D-Bus setter method"
681
self.checker_command = checker
682
# Emit D-Bus signal
683
self.PropertyChanged(dbus.String(u"checker"),
684
dbus.String(self.checker_command,
685
variant_level=1))
686
687
# SetHost - method
688
@dbus.service.method(_interface, in_signature=u"s")
689
def SetHost(self, host):
690
"D-Bus setter method"
691
self.host = host
692
# Emit D-Bus signal
693
self.PropertyChanged(dbus.String(u"host"),
694
dbus.String(self.host, variant_level=1))
695
696
# SetInterval - method
697
@dbus.service.method(_interface, in_signature=u"t")
698
def SetInterval(self, milliseconds):
699
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
700
# Emit D-Bus signal
701
self.PropertyChanged(dbus.String(u"interval"),
702
(dbus.UInt64(self.interval_milliseconds(),
703
variant_level=1)))
704
705
# SetSecret - method
706
@dbus.service.method(_interface, in_signature=u"ay",
707
byte_arrays=True)
708
def SetSecret(self, secret):
709
"D-Bus setter method"
710
self.secret = str(secret)
711
712
# SetTimeout - method
713
@dbus.service.method(_interface, in_signature=u"t")
714
def SetTimeout(self, milliseconds):
715
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
716
# Emit D-Bus signal
717
self.PropertyChanged(dbus.String(u"timeout"),
718
(dbus.UInt64(self.timeout_milliseconds(),
719
variant_level=1)))
1219
@dbus.service.signal(_interface, signature="s")
1220
def Rejected(self, reason):
1221
"D-Bus signal"
1222
pass
1223
1224
# NeedApproval - signal
1225
@dbus.service.signal(_interface, signature="tb")
1226
def NeedApproval(self, timeout, default):
1227
"D-Bus signal"
1228
return self.need_approval()
1229
1230
# NeRwequest - signal
1231
@dbus.service.signal(_interface, signature="s")
1232
def NewRequest(self, ip):
1233
"""D-Bus signal
1234
Is sent after a client request a password.
1235
"""
1236
pass
1237
1238
## Methods
1239
1240
# Approve - method
1241
@dbus.service.method(_interface, in_signature="b")
1242
def Approve(self, value):
1243
self.approve(value)
1244
1245
# CheckedOK - method
1246
@dbus.service.method(_interface)
1247
def CheckedOK(self):
1248
self.checked_ok()
720
1249
721
1250
# Enable - method
722
1251
@dbus.service.method(_interface)
741
1270
def StopChecker(self):
742
1271
self.stop_checker()
743
1272
1273
## Properties
1274
1275
# ApprovalPending - property
1276
@dbus_service_property(_interface, signature="b", access="read")
1277
def ApprovalPending_dbus_property(self):
1278
return dbus.Boolean(bool(self.approvals_pending))
1279
1280
# ApprovedByDefault - property
1281
@dbus_service_property(_interface, signature="b",
1282
access="readwrite")
1283
def ApprovedByDefault_dbus_property(self, value=None):
1284
if value is None: # get
1285
return dbus.Boolean(self.approved_by_default)
1286
self.approved_by_default = bool(value)
1287
1288
# ApprovalDelay - property
1289
@dbus_service_property(_interface, signature="t",
1290
access="readwrite")
1291
def ApprovalDelay_dbus_property(self, value=None):
1292
if value is None: # get
1293
return dbus.UInt64(self.approval_delay_milliseconds())
1294
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1295
1296
# ApprovalDuration - property
1297
@dbus_service_property(_interface, signature="t",
1298
access="readwrite")
1299
def ApprovalDuration_dbus_property(self, value=None):
1300
if value is None: # get
1301
return dbus.UInt64(timedelta_to_milliseconds(
1302
self.approval_duration))
1303
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1304
1305
# Name - property
1306
@dbus_service_property(_interface, signature="s", access="read")
1307
def Name_dbus_property(self):
1308
return dbus.String(self.name)
1309
1310
# Fingerprint - property
1311
@dbus_service_property(_interface, signature="s", access="read")
1312
def Fingerprint_dbus_property(self):
1313
return dbus.String(self.fingerprint)
1314
1315
# Host - property
1316
@dbus_service_property(_interface, signature="s",
1317
access="readwrite")
1318
def Host_dbus_property(self, value=None):
1319
if value is None: # get
1320
return dbus.String(self.host)
1321
self.host = unicode(value)
1322
1323
# Created - property
1324
@dbus_service_property(_interface, signature="s", access="read")
1325
def Created_dbus_property(self):
1326
return datetime_to_dbus(self.created)
1327
1328
# LastEnabled - property
1329
@dbus_service_property(_interface, signature="s", access="read")
1330
def LastEnabled_dbus_property(self):
1331
return datetime_to_dbus(self.last_enabled)
1332
1333
# Enabled - property
1334
@dbus_service_property(_interface, signature="b",
1335
access="readwrite")
1336
def Enabled_dbus_property(self, value=None):
1337
if value is None: # get
1338
return dbus.Boolean(self.enabled)
1339
if value:
1340
self.enable()
1341
else:
1342
self.disable()
1343
1344
# LastCheckedOK - property
1345
@dbus_service_property(_interface, signature="s",
1346
access="readwrite")
1347
def LastCheckedOK_dbus_property(self, value=None):
1348
if value is not None:
1349
self.checked_ok()
1350
return
1351
return datetime_to_dbus(self.last_checked_ok)
1352
1353
# Expires - property
1354
@dbus_service_property(_interface, signature="s", access="read")
1355
def Expires_dbus_property(self):
1356
return datetime_to_dbus(self.expires)
1357
1358
# LastApprovalRequest - property
1359
@dbus_service_property(_interface, signature="s", access="read")
1360
def LastApprovalRequest_dbus_property(self):
1361
return datetime_to_dbus(self.last_approval_request)
1362
1363
# Timeout - property
1364
@dbus_service_property(_interface, signature="t",
1365
access="readwrite")
1366
def Timeout_dbus_property(self, value=None):
1367
if value is None: # get
1368
return dbus.UInt64(self.timeout_milliseconds())
1369
self.timeout = datetime.timedelta(0, 0, 0, value)
1370
# Reschedule timeout
1371
if self.enabled:
1372
now = datetime.datetime.utcnow()
1373
time_to_die = timedelta_to_milliseconds(
1374
(self.last_checked_ok + self.timeout) - now)
1375
if time_to_die <= 0:
1376
# The timeout has passed
1377
self.disable()
1378
else:
1379
self.expires = (now +
1380
datetime.timedelta(milliseconds =
1381
time_to_die))
1382
if (getattr(self, "disable_initiator_tag", None)
1383
is None):
1384
return
1385
gobject.source_remove(self.disable_initiator_tag)
1386
self.disable_initiator_tag = (gobject.timeout_add
1387
(time_to_die,
1388
self.disable))
1389
1390
# ExtendedTimeout - property
1391
@dbus_service_property(_interface, signature="t",
1392
access="readwrite")
1393
def ExtendedTimeout_dbus_property(self, value=None):
1394
if value is None: # get
1395
return dbus.UInt64(self.extended_timeout_milliseconds())
1396
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1397
1398
# Interval - property
1399
@dbus_service_property(_interface, signature="t",
1400
access="readwrite")
1401
def Interval_dbus_property(self, value=None):
1402
if value is None: # get
1403
return dbus.UInt64(self.interval_milliseconds())
1404
self.interval = datetime.timedelta(0, 0, 0, value)
1405
if getattr(self, "checker_initiator_tag", None) is None:
1406
return
1407
if self.enabled:
1408
# Reschedule checker run
1409
gobject.source_remove(self.checker_initiator_tag)
1410
self.checker_initiator_tag = (gobject.timeout_add
1411
(value, self.start_checker))
1412
self.start_checker() # Start one now, too
1413
1414
# Checker - property
1415
@dbus_service_property(_interface, signature="s",
1416
access="readwrite")
1417
def Checker_dbus_property(self, value=None):
1418
if value is None: # get
1419
return dbus.String(self.checker_command)
1420
self.checker_command = unicode(value)
1421
1422
# CheckerRunning - property
1423
@dbus_service_property(_interface, signature="b",
1424
access="readwrite")
1425
def CheckerRunning_dbus_property(self, value=None):
1426
if value is None: # get
1427
return dbus.Boolean(self.checker is not None)
1428
if value:
1429
self.start_checker()
1430
else:
1431
self.stop_checker()
1432
1433
# ObjectPath - property
1434
@dbus_service_property(_interface, signature="o", access="read")
1435
def ObjectPath_dbus_property(self):
1436
return self.dbus_object_path # is already a dbus.ObjectPath
1437
1438
# Secret = property
1439
@dbus_service_property(_interface, signature="ay",
1440
access="write", byte_arrays=True)
1441
def Secret_dbus_property(self, value):
1442
self.secret = str(value)
1443
744
1444
del _interface
745
1445
746
1446
1447
class ProxyClient(object):
1448
def __init__(self, child_pipe, fpr, address):
1449
self._pipe = child_pipe
1450
self._pipe.send(('init', fpr, address))
1451
if not self._pipe.recv():
1452
raise KeyError()
1453
1454
def __getattribute__(self, name):
1455
if name == '_pipe':
1456
return super(ProxyClient, self).__getattribute__(name)
1457
self._pipe.send(('getattr', name))
1458
data = self._pipe.recv()
1459
if data[0] == 'data':
1460
return data[1]
1461
if data[0] == 'function':
1462
def func(*args, **kwargs):
1463
self._pipe.send(('funcall', name, args, kwargs))
1464
return self._pipe.recv()[1]
1465
return func
1466
1467
def __setattr__(self, name, value):
1468
if name == '_pipe':
1469
return super(ProxyClient, self).__setattr__(name, value)
1470
self._pipe.send(('setattr', name, value))
1471
1472
1473
class ClientDBusTransitional(ClientDBus):
1474
__metaclass__ = AlternateDBusNamesMetaclass
1475
1476
747
1477
class ClientHandler(socketserver.BaseRequestHandler, object):
748
1478
"""A class to handle client connections.
749
1479
751
1481
Note: This will run in its own forked process."""
752
1482
753
1483
def handle(self):
754
logger.info(u"TCP connection from: %s",
755
unicode(self.client_address))
756
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
757
# Open IPC pipe to parent process
758
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1484
with contextlib.closing(self.server.child_pipe) as child_pipe:
1485
logger.info("TCP connection from: %s",
1486
unicode(self.client_address))
1487
logger.debug("Pipe FD: %d",
1488
self.server.child_pipe.fileno())
1489
759
1490
session = (gnutls.connection
760
1491
.ClientSession(self.request,
761
1492
gnutls.connection
762
1493
.X509Credentials()))
763
1494
764
line = self.request.makefile().readline()
765
logger.debug(u"Protocol version: %r", line)
766
try:
767
if int(line.strip().split()[0]) > 1:
768
raise RuntimeError
769
except (ValueError, IndexError, RuntimeError), error:
770
logger.error(u"Unknown protocol version: %s", error)
771
return
772
773
1495
# Note: gnutls.connection.X509Credentials is really a
774
1496
# generic GnuTLS certificate credentials object so long as
775
1497
# no X.509 keys are added to it. Therefore, we can use it
776
1498
# here despite using OpenPGP certificates.
777
1499
778
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
779
# u"+AES-256-CBC", u"+SHA1",
780
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
781
# u"+DHE-DSS"))
1500
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1501
# "+AES-256-CBC", "+SHA1",
1502
# "+COMP-NULL", "+CTYPE-OPENPGP",
1503
# "+DHE-DSS"))
782
1504
# Use a fallback default, since this MUST be set.
783
1505
priority = self.server.gnutls_priority
784
1506
if priority is None:
785
priority = u"NORMAL"
1507
priority = "NORMAL"
786
1508
(gnutls.library.functions
787
1509
.gnutls_priority_set_direct(session._c_object,
788
1510
priority, None))
789
1511
1512
# Start communication using the Mandos protocol
1513
# Get protocol number
1514
line = self.request.makefile().readline()
1515
logger.debug("Protocol version: %r", line)
1516
try:
1517
if int(line.strip().split()[0]) > 1:
1518
raise RuntimeError
1519
except (ValueError, IndexError, RuntimeError) as error:
1520
logger.error("Unknown protocol version: %s", error)
1521
return
1522
1523
# Start GnuTLS connection
790
1524
try:
791
1525
session.handshake()
792
except gnutls.errors.GNUTLSError, error:
793
logger.warning(u"Handshake failed: %s", error)
1526
except gnutls.errors.GNUTLSError as error:
1527
logger.warning("Handshake failed: %s", error)
794
1528
# Do not run session.bye() here: the session is not
795
1529
# established. Just abandon the request.
796
1530
return
797
logger.debug(u"Handshake succeeded")
1531
logger.debug("Handshake succeeded")
1532
1533
approval_required = False
798
1534
try:
799
fpr = self.fingerprint(self.peer_certificate(session))
800
except (TypeError, gnutls.errors.GNUTLSError), error:
801
logger.warning(u"Bad certificate: %s", error)
802
session.bye()
803
return
804
logger.debug(u"Fingerprint: %s", fpr)
1535
try:
1536
fpr = self.fingerprint(self.peer_certificate
1537
(session))
1538
except (TypeError,
1539
gnutls.errors.GNUTLSError) as error:
1540
logger.warning("Bad certificate: %s", error)
1541
return
1542
logger.debug("Fingerprint: %s", fpr)
1543
1544
try:
1545
client = ProxyClient(child_pipe, fpr,
1546
self.client_address)
1547
except KeyError:
1548
return
1549
1550
if self.server.use_dbus:
1551
# Emit D-Bus signal
1552
client.NewRequest(str(self.client_address))
1553
1554
if client.approval_delay:
1555
delay = client.approval_delay
1556
client.approvals_pending += 1
1557
approval_required = True
1558
1559
while True:
1560
if not client.enabled:
1561
logger.info("Client %s is disabled",
1562
client.name)
1563
if self.server.use_dbus:
1564
# Emit D-Bus signal
1565
client.Rejected("Disabled")
1566
return
1567
1568
if client.approved or not client.approval_delay:
1569
#We are approved or approval is disabled
1570
break
1571
elif client.approved is None:
1572
logger.info("Client %s needs approval",
1573
client.name)
1574
if self.server.use_dbus:
1575
# Emit D-Bus signal
1576
client.NeedApproval(
1577
client.approval_delay_milliseconds(),
1578
client.approved_by_default)
1579
else:
1580
logger.warning("Client %s was not approved",
1581
client.name)
1582
if self.server.use_dbus:
1583
# Emit D-Bus signal
1584
client.Rejected("Denied")
1585
return
1586
1587
#wait until timeout or approved
1588
time = datetime.datetime.now()
1589
client.changedstate.acquire()
1590
(client.changedstate.wait
1591
(float(client.timedelta_to_milliseconds(delay)
1592
/ 1000)))
1593
client.changedstate.release()
1594
time2 = datetime.datetime.now()
1595
if (time2 - time) >= delay:
1596
if not client.approved_by_default:
1597
logger.warning("Client %s timed out while"
1598
" waiting for approval",
1599
client.name)
1600
if self.server.use_dbus:
1601
# Emit D-Bus signal
1602
client.Rejected("Approval timed out")
1603
return
1604
else:
1605
break
1606
else:
1607
delay -= time2 - time
1608
1609
sent_size = 0
1610
while sent_size < len(client.secret):
1611
try:
1612
sent = session.send(client.secret[sent_size:])
1613
except gnutls.errors.GNUTLSError as error:
1614
logger.warning("gnutls send failed")
1615
return
1616
logger.debug("Sent: %d, remaining: %d",
1617
sent, len(client.secret)
1618
- (sent_size + sent))
1619
sent_size += sent
1620
1621
logger.info("Sending secret to %s", client.name)
1622
# bump the timeout using extended_timeout
1623
client.checked_ok(client.extended_timeout)
1624
if self.server.use_dbus:
1625
# Emit D-Bus signal
1626
client.GotSecret()
805
1627
806
for c in self.server.clients:
807
if c.fingerprint == fpr:
808
client = c
809
break
810
else:
811
ipc.write(u"NOTFOUND %s\n" % fpr)
812
session.bye()
813
return
814
# Have to check if client.still_valid(), since it is
815
# possible that the client timed out while establishing
816
# the GnuTLS session.
817
if not client.still_valid():
818
ipc.write(u"INVALID %s\n" % client.name)
819
session.bye()
820
return
821
ipc.write(u"SENDING %s\n" % client.name)
822
sent_size = 0
823
while sent_size < len(client.secret):
824
sent = session.send(client.secret[sent_size:])
825
logger.debug(u"Sent: %d, remaining: %d",
826
sent, len(client.secret)
827
- (sent_size + sent))
828
sent_size += sent
829
session.bye()
1628
finally:
1629
if approval_required:
1630
client.approvals_pending -= 1
1631
try:
1632
session.bye()
1633
except gnutls.errors.GNUTLSError as error:
1634
logger.warning("GnuTLS bye failed")
830
1635
831
1636
@staticmethod
832
1637
def peer_certificate(session):
842
1647
.gnutls_certificate_get_peers
843
1648
(session._c_object, ctypes.byref(list_size)))
844
1649
if not bool(cert_list) and list_size.value != 0:
845
raise gnutls.errors.GNUTLSError(u"error getting peer"
846
u" certificate")
1650
raise gnutls.errors.GNUTLSError("error getting peer"
1651
" certificate")
847
1652
if list_size.value == 0:
848
1653
return None
849
1654
cert = cert_list[0]
875
1680
if crtverify.value != 0:
876
1681
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
877
1682
raise (gnutls.errors.CertificateSecurityError
878
(u"Verify failed"))
1683
("Verify failed"))
879
1684
# New buffer for the fingerprint
880
1685
buf = ctypes.create_string_buffer(20)
881
1686
buf_len = ctypes.c_size_t()
888
1693
# Convert the buffer to a Python bytestring
889
1694
fpr = ctypes.string_at(buf, buf_len.value)
890
1695
# Convert the bytestring to hexadecimal notation
891
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1696
hex_fpr = binascii.hexlify(fpr).upper()
892
1697
return hex_fpr
893
1698
894
1699
895
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
896
"""Like socketserver.ForkingMixIn, but also pass a pipe.
1700
class MultiprocessingMixIn(object):
1701
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1702
def sub_process_main(self, request, address):
1703
try:
1704
self.finish_request(request, address)
1705
except Exception:
1706
self.handle_error(request, address)
1707
self.close_request(request)
897
1708
898
Assumes a gobject.MainLoop event loop.
899
"""
1709
def process_request(self, request, address):
1710
"""Start a new process to process the request."""
1711
proc = multiprocessing.Process(target = self.sub_process_main,
1712
args = (request,
1713
address))
1714
proc.start()
1715
return proc
1716
1717
1718
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1719
""" adds a pipe to the MixIn """
900
1720
def process_request(self, request, client_address):
901
1721
"""Overrides and wraps the original process_request().
902
1722
903
This function creates a new pipe in self.pipe
1723
This function creates a new pipe in self.pipe
904
1724
"""
905
self.pipe = os.pipe()
906
super(ForkingMixInWithPipe,
907
self).process_request(request, client_address)
908
os.close(self.pipe[1]) # close write end
909
# Call "handle_ipc" for both data and EOF events
910
gobject.io_add_watch(self.pipe[0],
911
gobject.IO_IN | gobject.IO_HUP,
912
self.handle_ipc)
913
def handle_ipc(source, condition):
1725
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1726
1727
proc = MultiprocessingMixIn.process_request(self, request,
1728
client_address)
1729
self.child_pipe.close()
1730
self.add_pipe(parent_pipe, proc)
1731
1732
def add_pipe(self, parent_pipe, proc):
914
1733
"""Dummy function; override as necessary"""
915
os.close(source)
916
return False
917
918
919
class IPv6_TCPServer(ForkingMixInWithPipe,
1734
raise NotImplementedError
1735
1736
1737
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
920
1738
socketserver.TCPServer, object):
921
1739
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
922
1740
924
1742
enabled: Boolean; whether this server is activated yet
925
1743
interface: None or a network interface name (string)
926
1744
use_ipv6: Boolean; to use IPv6 or not
927
----
928
clients: set of Client objects
929
gnutls_priority GnuTLS priority string
930
use_dbus: Boolean; to emit D-Bus signals or not
931
1745
"""
932
1746
def __init__(self, server_address, RequestHandlerClass,
933
interface=None, use_ipv6=True, clients=None,
934
gnutls_priority=None, use_dbus=True):
935
self.enabled = False
1747
interface=None, use_ipv6=True):
936
1748
self.interface = interface
937
1749
if use_ipv6:
938
1750
self.address_family = socket.AF_INET6
939
self.clients = clients
940
self.use_dbus = use_dbus
941
self.gnutls_priority = gnutls_priority
942
1751
socketserver.TCPServer.__init__(self, server_address,
943
1752
RequestHandlerClass)
944
1753
def server_bind(self):
947
1756
bind to an address or port if they were not specified."""
948
1757
if self.interface is not None:
949
1758
if SO_BINDTODEVICE is None:
950
logger.error(u"SO_BINDTODEVICE does not exist;"
951
u" cannot bind to interface %s",
1759
logger.error("SO_BINDTODEVICE does not exist;"
1760
" cannot bind to interface %s",
952
1761
self.interface)
953
1762
else:
954
1763
try:
955
1764
self.socket.setsockopt(socket.SOL_SOCKET,
956
1765
SO_BINDTODEVICE,
957
1766
str(self.interface
958
+ u'\0'))
959
except socket.error, error:
1767
+ '\0'))
1768
except socket.error as error:
960
1769
if error[0] == errno.EPERM:
961
logger.error(u"No permission to"
962
u" bind to interface %s",
1770
logger.error("No permission to"
1771
" bind to interface %s",
963
1772
self.interface)
964
1773
elif error[0] == errno.ENOPROTOOPT:
965
logger.error(u"SO_BINDTODEVICE not available;"
966
u" cannot bind to interface %s",
1774
logger.error("SO_BINDTODEVICE not available;"
1775
" cannot bind to interface %s",
967
1776
self.interface)
968
1777
else:
969
1778
raise
971
1780
if self.server_address[0] or self.server_address[1]:
972
1781
if not self.server_address[0]:
973
1782
if self.address_family == socket.AF_INET6:
974
any_address = u"::" # in6addr_any
1783
any_address = "::" # in6addr_any
975
1784
else:
976
1785
any_address = socket.INADDR_ANY
977
1786
self.server_address = (any_address,
986
1795
# if_nametoindex
987
1796
# (self.interface))
988
1797
return socketserver.TCPServer.server_bind(self)
1798
1799
1800
class MandosServer(IPv6_TCPServer):
1801
"""Mandos server.
1802
1803
Attributes:
1804
clients: set of Client objects
1805
gnutls_priority GnuTLS priority string
1806
use_dbus: Boolean; to emit D-Bus signals or not
1807
1808
Assumes a gobject.MainLoop event loop.
1809
"""
1810
def __init__(self, server_address, RequestHandlerClass,
1811
interface=None, use_ipv6=True, clients=None,
1812
gnutls_priority=None, use_dbus=True):
1813
self.enabled = False
1814
self.clients = clients
1815
if self.clients is None:
1816
self.clients = {}
1817
self.use_dbus = use_dbus
1818
self.gnutls_priority = gnutls_priority
1819
IPv6_TCPServer.__init__(self, server_address,
1820
RequestHandlerClass,
1821
interface = interface,
1822
use_ipv6 = use_ipv6)
989
1823
def server_activate(self):
990
1824
if self.enabled:
991
1825
return socketserver.TCPServer.server_activate(self)
1826
992
1827
def enable(self):
993
1828
self.enabled = True
994
def handle_ipc(self, source, condition, file_objects={}):
1829
1830
def add_pipe(self, parent_pipe, proc):
1831
# Call "handle_ipc" for both data and EOF events
1832
gobject.io_add_watch(parent_pipe.fileno(),
1833
gobject.IO_IN | gobject.IO_HUP,
1834
functools.partial(self.handle_ipc,
1835
parent_pipe =
1836
parent_pipe,
1837
proc = proc))
1838
1839
def handle_ipc(self, source, condition, parent_pipe=None,
1840
proc = None, client_object=None):
995
1841
condition_names = {
996
gobject.IO_IN: u"IN", # There is data to read.
997
gobject.IO_OUT: u"OUT", # Data can be written (without
1842
gobject.IO_IN: "IN", # There is data to read.
1843
gobject.IO_OUT: "OUT", # Data can be written (without
998
1844
# blocking).
999
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1000
gobject.IO_ERR: u"ERR", # Error condition.
1001
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1845
gobject.IO_PRI: "PRI", # There is urgent data to read.
1846
gobject.IO_ERR: "ERR", # Error condition.
1847
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1002
1848
# broken, usually for pipes and
1003
1849
# sockets).
1004
1850
}
1006
1852
for cond, name in
1007
1853
condition_names.iteritems()
1008
1854
if cond & condition)
1009
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1010
conditions_string)
1011
1012
# Turn the pipe file descriptor into a Python file object
1013
if source not in file_objects:
1014
file_objects[source] = os.fdopen(source, u"r", 1)
1015
1016
# Read a line from the file object
1017
cmdline = file_objects[source].readline()
1018
if not cmdline: # Empty line means end of file
1019
# close the IPC pipe
1020
file_objects[source].close()
1021
del file_objects[source]
1022
1023
# Stop calling this function
1024
return False
1025
1026
logger.debug(u"IPC command: %r", cmdline)
1027
1028
# Parse and act on command
1029
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1030
1031
if cmd == u"NOTFOUND":
1032
logger.warning(u"Client not found for fingerprint: %s",
1033
args)
1034
if self.use_dbus:
1035
# Emit D-Bus signal
1036
mandos_dbus_service.ClientNotFound(args)
1037
elif cmd == u"INVALID":
1038
for client in self.clients:
1039
if client.name == args:
1040
logger.warning(u"Client %s is invalid", args)
1041
if self.use_dbus:
1042
# Emit D-Bus signal
1043
client.Rejected()
1044
break
1045
else:
1046
logger.error(u"Unknown client %s is invalid", args)
1047
elif cmd == u"SENDING":
1048
for client in self.clients:
1049
if client.name == args:
1050
logger.info(u"Sending secret to %s", client.name)
1051
client.checked_ok()
1052
if self.use_dbus:
1053
# Emit D-Bus signal
1054
client.ReceivedSecret()
1055
break
1056
else:
1057
logger.error(u"Sending secret to unknown client %s",
1058
args)
1059
else:
1060
logger.error(u"Unknown IPC command: %r", cmdline)
1061
1062
# Keep calling this function
1855
# error, or the other end of multiprocessing.Pipe has closed
1856
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1857
# Wait for other process to exit
1858
proc.join()
1859
return False
1860
1861
# Read a request from the child
1862
request = parent_pipe.recv()
1863
command = request[0]
1864
1865
if command == 'init':
1866
fpr = request[1]
1867
address = request[2]
1868
1869
for c in self.clients.itervalues():
1870
if c.fingerprint == fpr:
1871
client = c
1872
break
1873
else:
1874
logger.info("Client not found for fingerprint: %s, ad"
1875
"dress: %s", fpr, address)
1876
if self.use_dbus:
1877
# Emit D-Bus signal
1878
mandos_dbus_service.ClientNotFound(fpr,
1879
address[0])
1880
parent_pipe.send(False)
1881
return False
1882
1883
gobject.io_add_watch(parent_pipe.fileno(),
1884
gobject.IO_IN | gobject.IO_HUP,
1885
functools.partial(self.handle_ipc,
1886
parent_pipe =
1887
parent_pipe,
1888
proc = proc,
1889
client_object =
1890
client))
1891
parent_pipe.send(True)
1892
# remove the old hook in favor of the new above hook on
1893
# same fileno
1894
return False
1895
if command == 'funcall':
1896
funcname = request[1]
1897
args = request[2]
1898
kwargs = request[3]
1899
1900
parent_pipe.send(('data', getattr(client_object,
1901
funcname)(*args,
1902
**kwargs)))
1903
1904
if command == 'getattr':
1905
attrname = request[1]
1906
if callable(client_object.__getattribute__(attrname)):
1907
parent_pipe.send(('function',))
1908
else:
1909
parent_pipe.send(('data', client_object
1910
.__getattribute__(attrname)))
1911
1912
if command == 'setattr':
1913
attrname = request[1]
1914
value = request[2]
1915
setattr(client_object, attrname, value)
1916
1063
1917
return True
1064
1918
1065
1919
1066
1920
def string_to_delta(interval):
1067
1921
"""Parse a string and return a datetime.timedelta
1068
1922
1069
>>> string_to_delta(u'7d')
1923
>>> string_to_delta('7d')
1070
1924
datetime.timedelta(7)
1071
>>> string_to_delta(u'60s')
1925
>>> string_to_delta('60s')
1072
1926
datetime.timedelta(0, 60)
1073
>>> string_to_delta(u'60m')
1927
>>> string_to_delta('60m')
1074
1928
datetime.timedelta(0, 3600)
1075
>>> string_to_delta(u'24h')
1929
>>> string_to_delta('24h')
1076
1930
datetime.timedelta(1)
1077
>>> string_to_delta(u'1w')
1931
>>> string_to_delta('1w')
1078
1932
datetime.timedelta(7)
1079
>>> string_to_delta(u'5m 30s')
1933
>>> string_to_delta('5m 30s')
1080
1934
datetime.timedelta(0, 330)
1081
1935
"""
1082
1936
timevalue = datetime.timedelta(0)
1084
1938
try:
1085
1939
suffix = unicode(s[-1])
1086
1940
value = int(s[:-1])
1087
if suffix == u"d":
1941
if suffix == "d":
1088
1942
delta = datetime.timedelta(value)
1089
elif suffix == u"s":
1943
elif suffix == "s":
1090
1944
delta = datetime.timedelta(0, value)
1091
elif suffix == u"m":
1945
elif suffix == "m":
1092
1946
delta = datetime.timedelta(0, 0, 0, 0, value)
1093
elif suffix == u"h":
1947
elif suffix == "h":
1094
1948
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1095
elif suffix == u"w":
1949
elif suffix == "w":
1096
1950
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1097
1951
else:
1098
raise ValueError
1099
except (ValueError, IndexError):
1100
raise ValueError
1952
raise ValueError("Unknown suffix %r" % suffix)
1953
except (ValueError, IndexError) as e:
1954
raise ValueError(*(e.args))
1101
1955
timevalue += delta
1102
1956
return timevalue
1103
1957
1104
1958
1105
def if_nametoindex(interface):
1106
"""Call the C function if_nametoindex(), or equivalent
1107
1108
Note: This function cannot accept a unicode string."""
1109
global if_nametoindex
1110
try:
1111
if_nametoindex = (ctypes.cdll.LoadLibrary
1112
(ctypes.util.find_library(u"c"))
1113
.if_nametoindex)
1114
except (OSError, AttributeError):
1115
logger.warning(u"Doing if_nametoindex the hard way")
1116
def if_nametoindex(interface):
1117
"Get an interface index the hard way, i.e. using fcntl()"
1118
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1119
with closing(socket.socket()) as s:
1120
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1121
struct.pack(str(u"16s16x"),
1122
interface))
1123
interface_index = struct.unpack(str(u"I"),
1124
ifreq[16:20])[0]
1125
return interface_index
1126
return if_nametoindex(interface)
1127
1128
1129
1959
def daemon(nochdir = False, noclose = False):
1130
1960
"""See daemon(3). Standard BSD Unix function.
1131
1961
1134
1964
sys.exit()
1135
1965
os.setsid()
1136
1966
if not nochdir:
1137
os.chdir(u"/")
1967
os.chdir("/")
1138
1968
if os.fork():
1139
1969
sys.exit()
1140
1970
if not noclose:
1142
1972
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1143
1973
if not stat.S_ISCHR(os.fstat(null).st_mode):
1144
1974
raise OSError(errno.ENODEV,
1145
u"/dev/null not a character device")
1975
"%s not a character device"
1976
% os.path.devnull)
1146
1977
os.dup2(null, sys.stdin.fileno())
1147
1978
os.dup2(null, sys.stdout.fileno())
1148
1979
os.dup2(null, sys.stderr.fileno())
1152
1983
1153
1984
def main():
1154
1985
1155
######################################################################
1986
##################################################################
1156
1987
# Parsing of options, both command line and config file
1157
1988
1158
parser = optparse.OptionParser(version = "%%prog %s" % version)
1159
parser.add_option("-i", u"--interface", type=u"string",
1160
metavar="IF", help=u"Bind to interface IF")
1161
parser.add_option("-a", u"--address", type=u"string",
1162
help=u"Address to listen for requests on")
1163
parser.add_option("-p", u"--port", type=u"int",
1164
help=u"Port number to receive requests on")
1165
parser.add_option("--check", action=u"store_true",
1166
help=u"Run self-test")
1167
parser.add_option("--debug", action=u"store_true",
1168
help=u"Debug mode; run in foreground and log to"
1169
u" terminal")
1170
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1171
u" priority string (see GnuTLS documentation)")
1172
parser.add_option("--servicename", type=u"string",
1173
metavar=u"NAME", help=u"Zeroconf service name")
1174
parser.add_option("--configdir", type=u"string",
1175
default=u"/etc/mandos", metavar=u"DIR",
1176
help=u"Directory to search for configuration"
1177
u" files")
1178
parser.add_option("--no-dbus", action=u"store_false",
1179
dest=u"use_dbus", help=u"Do not provide D-Bus"
1180
u" system bus interface")
1181
parser.add_option("--no-ipv6", action=u"store_false",
1182
dest=u"use_ipv6", help=u"Do not use IPv6")
1183
options = parser.parse_args()[0]
1989
parser = argparse.ArgumentParser()
1990
parser.add_argument("-v", "--version", action="version",
1991
version = "%%(prog)s %s" % version,
1992
help="show version number and exit")
1993
parser.add_argument("-i", "--interface", metavar="IF",
1994
help="Bind to interface IF")
1995
parser.add_argument("-a", "--address",
1996
help="Address to listen for requests on")
1997
parser.add_argument("-p", "--port", type=int,
1998
help="Port number to receive requests on")
1999
parser.add_argument("--check", action="store_true",
2000
help="Run self-test")
2001
parser.add_argument("--debug", action="store_true",
2002
help="Debug mode; run in foreground and log"
2003
" to terminal")
2004
parser.add_argument("--debuglevel", metavar="LEVEL",
2005
help="Debug level for stdout output")
2006
parser.add_argument("--priority", help="GnuTLS"
2007
" priority string (see GnuTLS documentation)")
2008
parser.add_argument("--servicename",
2009
metavar="NAME", help="Zeroconf service name")
2010
parser.add_argument("--configdir",
2011
default="/etc/mandos", metavar="DIR",
2012
help="Directory to search for configuration"
2013
" files")
2014
parser.add_argument("--no-dbus", action="store_false",
2015
dest="use_dbus", help="Do not provide D-Bus"
2016
" system bus interface")
2017
parser.add_argument("--no-ipv6", action="store_false",
2018
dest="use_ipv6", help="Do not use IPv6")
2019
parser.add_argument("--no-restore", action="store_false",
2020
dest="restore", help="Do not restore stored"
2021
" state")
2022
parser.add_argument("--statedir", metavar="DIR",
2023
help="Directory to save/restore state in")
2024
2025
options = parser.parse_args()
1184
2026
1185
2027
if options.check:
1186
2028
import doctest
1188
2030
sys.exit()
1189
2031
1190
2032
# Default values for config file for server-global settings
1191
server_defaults = { u"interface": u"",
1192
u"address": u"",
1193
u"port": u"",
1194
u"debug": u"False",
1195
u"priority":
1196
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1197
u"servicename": u"Mandos",
1198
u"use_dbus": u"True",
1199
u"use_ipv6": u"True",
2033
server_defaults = { "interface": "",
2034
"address": "",
2035
"port": "",
2036
"debug": "False",
2037
"priority":
2038
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2039
"servicename": "Mandos",
2040
"use_dbus": "True",
2041
"use_ipv6": "True",
2042
"debuglevel": "",
2043
"restore": "True",
2044
"statedir": "/var/lib/mandos"
1200
2045
}
1201
2046
1202
2047
# Parse config file for server-global settings
1203
2048
server_config = configparser.SafeConfigParser(server_defaults)
1204
2049
del server_defaults
1205
2050
server_config.read(os.path.join(options.configdir,
1206
u"mandos.conf"))
2051
"mandos.conf"))
1207
2052
# Convert the SafeConfigParser object to a dict
1208
2053
server_settings = server_config.defaults()
1209
2054
# Use the appropriate methods on the non-string config options
1210
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1211
server_settings[option] = server_config.getboolean(u"DEFAULT",
2055
for option in ("debug", "use_dbus", "use_ipv6"):
2056
server_settings[option] = server_config.getboolean("DEFAULT",
1212
2057
option)
1213
2058
if server_settings["port"]:
1214
server_settings["port"] = server_config.getint(u"DEFAULT",
1215
u"port")
2059
server_settings["port"] = server_config.getint("DEFAULT",
2060
"port")
1216
2061
del server_config
1217
2062
1218
2063
# Override the settings from the config file with command line
1219
2064
# options, if set.
1220
for option in (u"interface", u"address", u"port", u"debug",
1221
u"priority", u"servicename", u"configdir",
1222
u"use_dbus", u"use_ipv6"):
2065
for option in ("interface", "address", "port", "debug",
2066
"priority", "servicename", "configdir",
2067
"use_dbus", "use_ipv6", "debuglevel", "restore",
2068
"statedir"):
1223
2069
value = getattr(options, option)
1224
2070
if value is not None:
1225
2071
server_settings[option] = value
1233
2079
##################################################################
1234
2080
1235
2081
# For convenience
1236
debug = server_settings[u"debug"]
1237
use_dbus = server_settings[u"use_dbus"]
1238
use_ipv6 = server_settings[u"use_ipv6"]
1239
1240
if not debug:
1241
syslogger.setLevel(logging.WARNING)
1242
console.setLevel(logging.WARNING)
1243
1244
if server_settings[u"servicename"] != u"Mandos":
2082
debug = server_settings["debug"]
2083
debuglevel = server_settings["debuglevel"]
2084
use_dbus = server_settings["use_dbus"]
2085
use_ipv6 = server_settings["use_ipv6"]
2086
stored_state_path = os.path.join(server_settings["statedir"],
2087
stored_state_file)
2088
2089
if debug:
2090
initlogger(debug, logging.DEBUG)
2091
else:
2092
if not debuglevel:
2093
initlogger(debug)
2094
else:
2095
level = getattr(logging, debuglevel.upper())
2096
initlogger(debug, level)
2097
2098
if server_settings["servicename"] != "Mandos":
1245
2099
syslogger.setFormatter(logging.Formatter
1246
(u'Mandos (%s) [%%(process)d]:'
1247
u' %%(levelname)s: %%(message)s'
1248
% server_settings[u"servicename"]))
2100
('Mandos (%s) [%%(process)d]:'
2101
' %%(levelname)s: %%(message)s'
2102
% server_settings["servicename"]))
1249
2103
1250
2104
# Parse config file with clients
1251
client_defaults = { u"timeout": u"1h",
1252
u"interval": u"5m",
1253
u"checker": u"fping -q -- %%(host)s",
1254
u"host": u"",
1255
}
1256
client_config = configparser.SafeConfigParser(client_defaults)
1257
client_config.read(os.path.join(server_settings[u"configdir"],
1258
u"clients.conf"))
2105
client_config = configparser.SafeConfigParser(Client
2106
.client_defaults)
2107
client_config.read(os.path.join(server_settings["configdir"],
2108
"clients.conf"))
1259
2109
1260
2110
global mandos_dbus_service
1261
2111
mandos_dbus_service = None
1262
2112
1263
clients = set()
1264
tcp_server = IPv6_TCPServer((server_settings[u"address"],
1265
server_settings[u"port"]),
1266
ClientHandler,
1267
interface=
1268
server_settings[u"interface"],
1269
use_ipv6=use_ipv6,
1270
clients=clients,
1271
gnutls_priority=
1272
server_settings[u"priority"],
1273
use_dbus=use_dbus)
1274
pidfilename = u"/var/run/mandos.pid"
1275
try:
1276
pidfile = open(pidfilename, u"w")
1277
except IOError:
1278
logger.error(u"Could not open file %r", pidfilename)
2113
tcp_server = MandosServer((server_settings["address"],
2114
server_settings["port"]),
2115
ClientHandler,
2116
interface=(server_settings["interface"]
2117
or None),
2118
use_ipv6=use_ipv6,
2119
gnutls_priority=
2120
server_settings["priority"],
2121
use_dbus=use_dbus)
2122
if not debug:
2123
pidfilename = "/var/run/mandos.pid"
2124
try:
2125
pidfile = open(pidfilename, "w")
2126
except IOError:
2127
logger.error("Could not open file %r", pidfilename)
1279
2128
1280
2129
try:
1281
uid = pwd.getpwnam(u"_mandos").pw_uid
1282
gid = pwd.getpwnam(u"_mandos").pw_gid
2130
uid = pwd.getpwnam("_mandos").pw_uid
2131
gid = pwd.getpwnam("_mandos").pw_gid
1283
2132
except KeyError:
1284
2133
try:
1285
uid = pwd.getpwnam(u"mandos").pw_uid
1286
gid = pwd.getpwnam(u"mandos").pw_gid
2134
uid = pwd.getpwnam("mandos").pw_uid
2135
gid = pwd.getpwnam("mandos").pw_gid
1287
2136
except KeyError:
1288
2137
try:
1289
uid = pwd.getpwnam(u"nobody").pw_uid
1290
gid = pwd.getpwnam(u"nobody").pw_gid
2138
uid = pwd.getpwnam("nobody").pw_uid
2139
gid = pwd.getpwnam("nobody").pw_gid
1291
2140
except KeyError:
1292
2141
uid = 65534
1293
2142
gid = 65534
1294
2143
try:
1295
2144
os.setgid(gid)
1296
2145
os.setuid(uid)
1297
except OSError, error:
2146
except OSError as error:
1298
2147
if error[0] != errno.EPERM:
1299
2148
raise error
1300
2149
1301
# Enable all possible GnuTLS debugging
1302
2150
if debug:
2151
# Enable all possible GnuTLS debugging
2152
1303
2153
# "Use a log level over 10 to enable all debugging options."
1304
2154
# - GnuTLS manual
1305
2155
gnutls.library.functions.gnutls_global_set_log_level(11)
1306
2156
1307
2157
@gnutls.library.types.gnutls_log_func
1308
2158
def debug_gnutls(level, string):
1309
logger.debug(u"GnuTLS: %s", string[:-1])
2159
logger.debug("GnuTLS: %s", string[:-1])
1310
2160
1311
2161
(gnutls.library.functions
1312
2162
.gnutls_global_set_log_function(debug_gnutls))
2163
2164
# Redirect stdin so all checkers get /dev/null
2165
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2166
os.dup2(null, sys.stdin.fileno())
2167
if null > 2:
2168
os.close(null)
2169
2170
# Need to fork before connecting to D-Bus
2171
if not debug:
2172
# Close all input and output, do double fork, etc.
2173
daemon()
2174
2175
gobject.threads_init()
1313
2176
1314
2177
global main_loop
1315
2178
# From the Avahi example code
1318
2181
bus = dbus.SystemBus()
1319
2182
# End of Avahi example code
1320
2183
if use_dbus:
1321
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2184
try:
2185
bus_name = dbus.service.BusName("se.recompile.Mandos",
2186
bus, do_not_queue=True)
2187
old_bus_name = (dbus.service.BusName
2188
("se.bsnet.fukt.Mandos", bus,
2189
do_not_queue=True))
2190
except dbus.exceptions.NameExistsException as e:
2191
logger.error(unicode(e) + ", disabling D-Bus")
2192
use_dbus = False
2193
server_settings["use_dbus"] = False
2194
tcp_server.use_dbus = False
1322
2195
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1323
service = AvahiService(name = server_settings[u"servicename"],
1324
servicetype = u"_mandos._tcp",
1325
protocol = protocol, bus = bus)
2196
service = AvahiServiceToSyslog(name =
2197
server_settings["servicename"],
2198
servicetype = "_mandos._tcp",
2199
protocol = protocol, bus = bus)
1326
2200
if server_settings["interface"]:
1327
2201
service.interface = (if_nametoindex
1328
(str(server_settings[u"interface"])))
2202
(str(server_settings["interface"])))
2203
2204
global multiprocessing_manager
2205
multiprocessing_manager = multiprocessing.Manager()
1329
2206
1330
2207
client_class = Client
1331
2208
if use_dbus:
1332
client_class = functools.partial(ClientDBus, bus = bus)
1333
clients.update(set(
1334
client_class(name = section,
1335
config= dict(client_config.items(section)))
1336
for section in client_config.sections()))
1337
if not clients:
1338
logger.warning(u"No clients defined")
1339
1340
if debug:
1341
# Redirect stdin so all checkers get /dev/null
1342
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1343
os.dup2(null, sys.stdin.fileno())
1344
if null > 2:
1345
os.close(null)
1346
else:
1347
# No console logging
1348
logger.removeHandler(console)
1349
# Close all input and output, do double fork, etc.
1350
daemon()
1351
1352
try:
1353
with closing(pidfile):
1354
pid = os.getpid()
1355
pidfile.write(str(pid) + "\n")
1356
del pidfile
1357
except IOError:
1358
logger.error(u"Could not write to file %r with PID %d",
1359
pidfilename, pid)
1360
except NameError:
1361
# "pidfile" was never created
1362
pass
1363
del pidfilename
1364
1365
def cleanup():
1366
"Cleanup function; run on exit"
1367
service.cleanup()
2209
client_class = functools.partial(ClientDBusTransitional,
2210
bus = bus)
2211
2212
client_settings = Client.config_parser(client_config)
2213
old_client_settings = {}
2214
clients_data = {}
2215
2216
# Get client data and settings from last running state.
2217
if server_settings["restore"]:
2218
try:
2219
with open(stored_state_path, "rb") as stored_state:
2220
clients_data, old_client_settings = (pickle.load
2221
(stored_state))
2222
os.remove(stored_state_path)
2223
except IOError as e:
2224
logger.warning("Could not load persistent state: {0}"
2225
.format(e))
2226
if e.errno != errno.ENOENT:
2227
raise
2228
except EOFError as e:
2229
logger.warning("Could not load persistent state: "
2230
"EOFError: {0}".format(e))
2231
2232
with PGPEngine() as pgp:
2233
for client_name, client in clients_data.iteritems():
2234
# Decide which value to use after restoring saved state.
2235
# We have three different values: Old config file,
2236
# new config file, and saved state.
2237
# New config value takes precedence if it differs from old
2238
# config value, otherwise use saved state.
2239
for name, value in client_settings[client_name].items():
2240
try:
2241
# For each value in new config, check if it
2242
# differs from the old config value (Except for
2243
# the "secret" attribute)
2244
if (name != "secret" and
2245
value != old_client_settings[client_name]
2246
[name]):
2247
client[name] = value
2248
except KeyError:
2249
pass
2250
2251
# Clients who has passed its expire date can still be
2252
# enabled if its last checker was successful. Clients
2253
# whose checker failed before we stored its state is
2254
# assumed to have failed all checkers during downtime.
2255
if client["enabled"]:
2256
if datetime.datetime.utcnow() >= client["expires"]:
2257
if not client["last_checked_ok"]:
2258
logger.warning(
2259
"disabling client {0} - Client never "
2260
"performed a successfull checker"
2261
.format(client["name"]))
2262
client["enabled"] = False
2263
elif client["last_checker_status"] != 0:
2264
logger.warning(
2265
"disabling client {0} - Client "
2266
"last checker failed with error code {1}"
2267
.format(client["name"],
2268
client["last_checker_status"]))
2269
client["enabled"] = False
2270
else:
2271
client["expires"] = (datetime.datetime
2272
.utcnow()
2273
+ client["timeout"])
2274
logger.debug("Last checker succeeded,"
2275
" keeping {0} enabled"
2276
.format(client["name"]))
2277
try:
2278
client["secret"] = (
2279
pgp.decrypt(client["encrypted_secret"],
2280
client_settings[client_name]
2281
["secret"]))
2282
except PGPError:
2283
# If decryption fails, we use secret from new settings
2284
logger.debug("Failed to decrypt {0} old secret"
2285
.format(client_name))
2286
client["secret"] = (
2287
client_settings[client_name]["secret"])
2288
2289
2290
# Add/remove clients based on new changes made to config
2291
for client_name in (set(old_client_settings)
2292
- set(client_settings)):
2293
del clients_data[client_name]
2294
for client_name in (set(client_settings)
2295
- set(old_client_settings)):
2296
clients_data[client_name] = client_settings[client_name]
2297
2298
# Create clients all clients
2299
for client_name, client in clients_data.iteritems():
2300
tcp_server.clients[client_name] = client_class(
2301
name = client_name, settings = client)
2302
2303
if not tcp_server.clients:
2304
logger.warning("No clients defined")
1368
2305
1369
while clients:
1370
client = clients.pop()
1371
client.disable_hook = None
1372
client.disable()
1373
1374
atexit.register(cleanup)
1375
1376
2306
if not debug:
2307
try:
2308
with pidfile:
2309
pid = os.getpid()
2310
pidfile.write(str(pid) + "\n".encode("utf-8"))
2311
del pidfile
2312
except IOError:
2313
logger.error("Could not write to file %r with PID %d",
2314
pidfilename, pid)
2315
except NameError:
2316
# "pidfile" was never created
2317
pass
2318
del pidfilename
1377
2319
signal.signal(signal.SIGINT, signal.SIG_IGN)
2320
1378
2321
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1379
2322
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1380
2323
1382
2325
class MandosDBusService(dbus.service.Object):
1383
2326
"""A D-Bus proxy object"""
1384
2327
def __init__(self):
1385
dbus.service.Object.__init__(self, bus, u"/")
1386
_interface = u"se.bsnet.fukt.Mandos"
1387
1388
@dbus.service.signal(_interface, signature=u"oa{sv}")
1389
def ClientAdded(self, objpath, properties):
1390
"D-Bus signal"
1391
pass
1392
1393
@dbus.service.signal(_interface, signature=u"s")
1394
def ClientNotFound(self, fingerprint):
1395
"D-Bus signal"
1396
pass
1397
1398
@dbus.service.signal(_interface, signature=u"os")
2328
dbus.service.Object.__init__(self, bus, "/")
2329
_interface = "se.recompile.Mandos"
2330
2331
@dbus.service.signal(_interface, signature="o")
2332
def ClientAdded(self, objpath):
2333
"D-Bus signal"
2334
pass
2335
2336
@dbus.service.signal(_interface, signature="ss")
2337
def ClientNotFound(self, fingerprint, address):
2338
"D-Bus signal"
2339
pass
2340
2341
@dbus.service.signal(_interface, signature="os")
1399
2342
def ClientRemoved(self, objpath, name):
1400
2343
"D-Bus signal"
1401
2344
pass
1402
2345
1403
@dbus.service.method(_interface, out_signature=u"ao")
2346
@dbus.service.method(_interface, out_signature="ao")
1404
2347
def GetAllClients(self):
1405
2348
"D-Bus method"
1406
return dbus.Array(c.dbus_object_path for c in clients)
2349
return dbus.Array(c.dbus_object_path
2350
for c in
2351
tcp_server.clients.itervalues())
1407
2352
1408
2353
@dbus.service.method(_interface,
1409
out_signature=u"a{oa{sv}}")
2354
out_signature="a{oa{sv}}")
1410
2355
def GetAllClientsWithProperties(self):
1411
2356
"D-Bus method"
1412
2357
return dbus.Dictionary(
1413
((c.dbus_object_path, c.GetAllProperties())
1414
for c in clients),
1415
signature=u"oa{sv}")
2358
((c.dbus_object_path, c.GetAll(""))
2359
for c in tcp_server.clients.itervalues()),
2360
signature="oa{sv}")
1416
2361
1417
@dbus.service.method(_interface, in_signature=u"o")
2362
@dbus.service.method(_interface, in_signature="o")
1418
2363
def RemoveClient(self, object_path):
1419
2364
"D-Bus method"
1420
for c in clients:
2365
for c in tcp_server.clients.itervalues():
1421
2366
if c.dbus_object_path == object_path:
1422
clients.remove(c)
2367
del tcp_server.clients[c.name]
1423
2368
c.remove_from_connection()
1424
2369
# Don't signal anything except ClientRemoved
1425
c.disable(signal=False)
2370
c.disable(quiet=True)
1426
2371
# Emit D-Bus signal
1427
2372
self.ClientRemoved(object_path, c.name)
1428
2373
return
1429
raise KeyError
2374
raise KeyError(object_path)
1430
2375
1431
2376
del _interface
1432
2377
1433
mandos_dbus_service = MandosDBusService()
1434
1435
for client in clients:
2378
class MandosDBusServiceTransitional(MandosDBusService):
2379
__metaclass__ = AlternateDBusNamesMetaclass
2380
mandos_dbus_service = MandosDBusServiceTransitional()
2381
2382
def cleanup():
2383
"Cleanup function; run on exit"
2384
service.cleanup()
2385
2386
multiprocessing.active_children()
2387
if not (tcp_server.clients or client_settings):
2388
return
2389
2390
# Store client before exiting. Secrets are encrypted with key
2391
# based on what config file has. If config file is
2392
# removed/edited, old secret will thus be unrecovable.
2393
clients = {}
2394
with PGPEngine() as pgp:
2395
for client in tcp_server.clients.itervalues():
2396
key = client_settings[client.name]["secret"]
2397
client.encrypted_secret = pgp.encrypt(client.secret,
2398
key)
2399
client_dict = {}
2400
2401
# A list of attributes that can not be pickled
2402
# + secret.
2403
exclude = set(("bus", "changedstate", "secret",
2404
"checker"))
2405
for name, typ in (inspect.getmembers
2406
(dbus.service.Object)):
2407
exclude.add(name)
2408
2409
client_dict["encrypted_secret"] = (client
2410
.encrypted_secret)
2411
for attr in client.client_structure:
2412
if attr not in exclude:
2413
client_dict[attr] = getattr(client, attr)
2414
2415
clients[client.name] = client_dict
2416
del client_settings[client.name]["secret"]
2417
2418
try:
2419
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2420
prefix="clients-",
2421
dir=os.path.dirname
2422
(stored_state_path))
2423
with os.fdopen(tempfd, "wb") as stored_state:
2424
pickle.dump((clients, client_settings), stored_state)
2425
os.rename(tempname, stored_state_path)
2426
except (IOError, OSError) as e:
2427
logger.warning("Could not save persistent state: {0}"
2428
.format(e))
2429
if not debug:
2430
try:
2431
os.remove(tempname)
2432
except NameError:
2433
pass
2434
if e.errno not in set((errno.ENOENT, errno.EACCES,
2435
errno.EEXIST)):
2436
raise e
2437
2438
# Delete all clients, and settings from config
2439
while tcp_server.clients:
2440
name, client = tcp_server.clients.popitem()
2441
if use_dbus:
2442
client.remove_from_connection()
2443
# Don't signal anything except ClientRemoved
2444
client.disable(quiet=True)
2445
if use_dbus:
2446
# Emit D-Bus signal
2447
mandos_dbus_service.ClientRemoved(client
2448
.dbus_object_path,
2449
client.name)
2450
client_settings.clear()
2451
2452
atexit.register(cleanup)
2453
2454
for client in tcp_server.clients.itervalues():
1436
2455
if use_dbus:
1437
2456
# Emit D-Bus signal
1438
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1439
client.GetAllProperties())
1440
client.enable()
2457
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2458
# Need to initiate checking of clients
2459
if client.enabled:
2460
client.init_checker()
1441
2461
1442
2462
tcp_server.enable()
1443
2463
tcp_server.server_activate()
1445
2465
# Find out what port we got
1446
2466
service.port = tcp_server.socket.getsockname()[1]
1447
2467
if use_ipv6:
1448
logger.info(u"Now listening on address %r, port %d,"
2468
logger.info("Now listening on address %r, port %d,"
1449
2469
" flowinfo %d, scope_id %d"
1450
2470
% tcp_server.socket.getsockname())
1451
2471
else: # IPv4
1452
logger.info(u"Now listening on address %r, port %d"
2472
logger.info("Now listening on address %r, port %d"
1453
2473
% tcp_server.socket.getsockname())
1454
2474
1455
2475
#service.interface = tcp_server.socket.getsockname()[3]
1458
2478
# From the Avahi example code
1459
2479
try:
1460
2480
service.activate()
1461
except dbus.exceptions.DBusException, error:
1462
logger.critical(u"DBusException: %s", error)
2481
except dbus.exceptions.DBusException as error:
2482
logger.critical("DBusException: %s", error)
2483
cleanup()
1463
2484
sys.exit(1)
1464
2485
# End of Avahi example code
1465
2486
1468
2489
(tcp_server.handle_request
1469
2490
(*args[2:], **kwargs) or True))
1470
2491
1471
logger.debug(u"Starting main loop")
2492
logger.debug("Starting main loop")
1472
2493
main_loop.run()
1473
except AvahiError, error:
1474
logger.critical(u"AvahiError: %s", error)
2494
except AvahiError as error:
2495
logger.critical("AvahiError: %s", error)
2496
cleanup()
1475
2497
sys.exit(1)
1476
2498
except KeyboardInterrupt:
1477
2499
if debug:
1478
print >> sys.stderr
1479
logger.debug(u"Server received KeyboardInterrupt")
1480
logger.debug(u"Server exiting")
2500
print("", file=sys.stderr)
2501
logger.debug("Server received KeyboardInterrupt")
2502
logger.debug("Server exiting")
2503
# Must run before the D-Bus bus name gets deregistered
2504
cleanup()
1481
2505
1482
2506
if __name__ == '__main__':
1483
2507
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0